/**
 * Make a map and return a function for checking if a key
 * is in that map.
 * IMPORTANT: all calls of this function must be prefixed with
 * \/\*#\_\_PURE\_\_\*\/
 * So that rollup can tree-shake them if necessary.
 */
function makeMap(str, expectsLowerCase) {
    const map = Object.create(null);
    const list = str.split(',');
    for (let i = 0; i < list.length; i++) {
        map[list[i]] = true;
    }
    return expectsLowerCase ? val => !!map[val.toLowerCase()] : val => !!map[val];
}

/**
 * dev only flag -> name mapping
 */
const PatchFlagNames = {
    [1 /* TEXT */]: `TEXT`,
    [2 /* CLASS */]: `CLASS`,
    [4 /* STYLE */]: `STYLE`,
    [8 /* PROPS */]: `PROPS`,
    [16 /* FULL_PROPS */]: `FULL_PROPS`,
    [32 /* HYDRATE_EVENTS */]: `HYDRATE_EVENTS`,
    [64 /* STABLE_FRAGMENT */]: `STABLE_FRAGMENT`,
    [128 /* KEYED_FRAGMENT */]: `KEYED_FRAGMENT`,
    [256 /* UNKEYED_FRAGMENT */]: `UNKEYED_FRAGMENT`,
    [512 /* NEED_PATCH */]: `NEED_PATCH`,
    [1024 /* DYNAMIC_SLOTS */]: `DYNAMIC_SLOTS`,
    [2048 /* DEV_ROOT_FRAGMENT */]: `DEV_ROOT_FRAGMENT`,
    [-1 /* HOISTED */]: `HOISTED`,
    [-2 /* BAIL */]: `BAIL`
};

/**
 * Dev only
 */
const slotFlagsText = {
    [1 /* STABLE */]: 'STABLE',
    [2 /* DYNAMIC */]: 'DYNAMIC',
    [3 /* FORWARDED */]: 'FORWARDED'
};

const GLOBALS_WHITE_LISTED = 'Infinity,undefined,NaN,isFinite,isNaN,parseFloat,parseInt,decodeURI,' +
    'decodeURIComponent,encodeURI,encodeURIComponent,Math,Number,Date,Array,' +
    'Object,Boolean,String,RegExp,Map,Set,JSON,Intl,BigInt';
const isGloballyWhitelisted = /*#__PURE__*/ makeMap(GLOBALS_WHITE_LISTED);

const range = 2;
function generateCodeFrame(source, start = 0, end = source.length) {
    // Split the content into individual lines but capture the newline sequence
    // that separated each line. This is important because the actual sequence is
    // needed to properly take into account the full line length for offset
    // comparison
    let lines = source.split(/(\r?\n)/);
    // Separate the lines and newline sequences into separate arrays for easier referencing
    const newlineSequences = lines.filter((_, idx) => idx % 2 === 1);
    lines = lines.filter((_, idx) => idx % 2 === 0);
    let count = 0;
    const res = [];
    for (let i = 0; i < lines.length; i++) {
        count +=
            lines[i].length +
                ((newlineSequences[i] && newlineSequences[i].length) || 0);
        if (count >= start) {
            for (let j = i - range; j <= i + range || end > count; j++) {
                if (j < 0 || j >= lines.length)
                    continue;
                const line = j + 1;
                res.push(`${line}${' '.repeat(Math.max(3 - String(line).length, 0))}|  ${lines[j]}`);
                const lineLength = lines[j].length;
                const newLineSeqLength = (newlineSequences[j] && newlineSequences[j].length) || 0;
                if (j === i) {
                    // push underline
                    const pad = start - (count - (lineLength + newLineSeqLength));
                    const length = Math.max(1, end > count ? lineLength - pad : end - start);
                    res.push(`   |  ` + ' '.repeat(pad) + '^'.repeat(length));
                }
                else if (j > i) {
                    if (end > count) {
                        const length = Math.max(Math.min(end - count, lineLength), 1);
                        res.push(`   |  ` + '^'.repeat(length));
                    }
                    count += lineLength + newLineSeqLength;
                }
            }
            break;
        }
    }
    return res.join('\n');
}

/**
 * On the client we only need to offer special cases for boolean attributes that
 * have different names from their corresponding dom properties:
 * - itemscope -> N/A
 * - allowfullscreen -> allowFullscreen
 * - formnovalidate -> formNoValidate
 * - ismap -> isMap
 * - nomodule -> noModule
 * - novalidate -> noValidate
 * - readonly -> readOnly
 */
const specialBooleanAttrs = `itemscope,allowfullscreen,formnovalidate,ismap,nomodule,novalidate,readonly`;
/**
 * The full list is needed during SSR to produce the correct initial markup.
 */
const isBooleanAttr = /*#__PURE__*/ makeMap(specialBooleanAttrs +
    `,async,autofocus,autoplay,controls,default,defer,disabled,hidden,` +
    `loop,open,required,reversed,scoped,seamless,` +
    `checked,muted,multiple,selected`);
const unsafeAttrCharRE = /[>/="'\u0009\u000a\u000c\u0020]/;
const attrValidationCache = {};
function isSSRSafeAttrName(name) {
    if (attrValidationCache.hasOwnProperty(name)) {
        return attrValidationCache[name];
    }
    const isUnsafe = unsafeAttrCharRE.test(name);
    if (isUnsafe) {
        console.error(`unsafe attribute name: ${name}`);
    }
    return (attrValidationCache[name] = !isUnsafe);
}
const propsToAttrMap = {
    acceptCharset: 'accept-charset',
    className: 'class',
    htmlFor: 'for',
    httpEquiv: 'http-equiv'
};
/**
 * CSS properties that accept plain numbers
 */
const isNoUnitNumericStyleProp = /*#__PURE__*/ makeMap(`animation-iteration-count,border-image-outset,border-image-slice,` +
    `border-image-width,box-flex,box-flex-group,box-ordinal-group,column-count,` +
    `columns,flex,flex-grow,flex-positive,flex-shrink,flex-negative,flex-order,` +
    `grid-row,grid-row-end,grid-row-span,grid-row-start,grid-column,` +
    `grid-column-end,grid-column-span,grid-column-start,font-weight,line-clamp,` +
    `line-height,opacity,order,orphans,tab-size,widows,z-index,zoom,` +
    // SVG
    `fill-opacity,flood-opacity,stop-opacity,stroke-dasharray,stroke-dashoffset,` +
    `stroke-miterlimit,stroke-opacity,stroke-width`);
/**
 * Known attributes, this is used for stringification of runtime static nodes
 * so that we don't stringify bindings that cannot be set from HTML.
 * Don't also forget to allow `data-*` and `aria-*`!
 * Generated from https://developer.mozilla.org/en-US/docs/Web/HTML/Attributes
 */
const isKnownHtmlAttr = /*#__PURE__*/ makeMap(`accept,accept-charset,accesskey,action,align,allow,alt,async,` +
    `autocapitalize,autocomplete,autofocus,autoplay,background,bgcolor,` +
    `border,buffered,capture,challenge,charset,checked,cite,class,code,` +
    `codebase,color,cols,colspan,content,contenteditable,contextmenu,controls,` +
    `coords,crossorigin,csp,data,datetime,decoding,default,defer,dir,dirname,` +
    `disabled,download,draggable,dropzone,enctype,enterkeyhint,for,form,` +
    `formaction,formenctype,formmethod,formnovalidate,formtarget,headers,` +
    `height,hidden,high,href,hreflang,http-equiv,icon,id,importance,integrity,` +
    `ismap,itemprop,keytype,kind,label,lang,language,loading,list,loop,low,` +
    `manifest,max,maxlength,minlength,media,min,multiple,muted,name,novalidate,` +
    `open,optimum,pattern,ping,placeholder,poster,preload,radiogroup,readonly,` +
    `referrerpolicy,rel,required,reversed,rows,rowspan,sandbox,scope,scoped,` +
    `selected,shape,size,sizes,slot,span,spellcheck,src,srcdoc,srclang,srcset,` +
    `start,step,style,summary,tabindex,target,title,translate,type,usemap,` +
    `value,width,wrap`);
/**
 * Generated from https://developer.mozilla.org/en-US/docs/Web/SVG/Attribute
 */
const isKnownSvgAttr = /*#__PURE__*/ makeMap(`xmlns,accent-height,accumulate,additive,alignment-baseline,alphabetic,amplitude,` +
    `arabic-form,ascent,attributeName,attributeType,azimuth,baseFrequency,` +
    `baseline-shift,baseProfile,bbox,begin,bias,by,calcMode,cap-height,class,` +
    `clip,clipPathUnits,clip-path,clip-rule,color,color-interpolation,` +
    `color-interpolation-filters,color-profile,color-rendering,` +
    `contentScriptType,contentStyleType,crossorigin,cursor,cx,cy,d,decelerate,` +
    `descent,diffuseConstant,direction,display,divisor,dominant-baseline,dur,dx,` +
    `dy,edgeMode,elevation,enable-background,end,exponent,fill,fill-opacity,` +
    `fill-rule,filter,filterRes,filterUnits,flood-color,flood-opacity,` +
    `font-family,font-size,font-size-adjust,font-stretch,font-style,` +
    `font-variant,font-weight,format,from,fr,fx,fy,g1,g2,glyph-name,` +
    `glyph-orientation-horizontal,glyph-orientation-vertical,glyphRef,` +
    `gradientTransform,gradientUnits,hanging,height,href,hreflang,horiz-adv-x,` +
    `horiz-origin-x,id,ideographic,image-rendering,in,in2,intercept,k,k1,k2,k3,` +
    `k4,kernelMatrix,kernelUnitLength,kerning,keyPoints,keySplines,keyTimes,` +
    `lang,lengthAdjust,letter-spacing,lighting-color,limitingConeAngle,local,` +
    `marker-end,marker-mid,marker-start,markerHeight,markerUnits,markerWidth,` +
    `mask,maskContentUnits,maskUnits,mathematical,max,media,method,min,mode,` +
    `name,numOctaves,offset,opacity,operator,order,orient,orientation,origin,` +
    `overflow,overline-position,overline-thickness,panose-1,paint-order,path,` +
    `pathLength,patternContentUnits,patternTransform,patternUnits,ping,` +
    `pointer-events,points,pointsAtX,pointsAtY,pointsAtZ,preserveAlpha,` +
    `preserveAspectRatio,primitiveUnits,r,radius,referrerPolicy,refX,refY,rel,` +
    `rendering-intent,repeatCount,repeatDur,requiredExtensions,requiredFeatures,` +
    `restart,result,rotate,rx,ry,scale,seed,shape-rendering,slope,spacing,` +
    `specularConstant,specularExponent,speed,spreadMethod,startOffset,` +
    `stdDeviation,stemh,stemv,stitchTiles,stop-color,stop-opacity,` +
    `strikethrough-position,strikethrough-thickness,string,stroke,` +
    `stroke-dasharray,stroke-dashoffset,stroke-linecap,stroke-linejoin,` +
    `stroke-miterlimit,stroke-opacity,stroke-width,style,surfaceScale,` +
    `systemLanguage,tabindex,tableValues,target,targetX,targetY,text-anchor,` +
    `text-decoration,text-rendering,textLength,to,transform,transform-origin,` +
    `type,u1,u2,underline-position,underline-thickness,unicode,unicode-bidi,` +
    `unicode-range,units-per-em,v-alphabetic,v-hanging,v-ideographic,` +
    `v-mathematical,values,vector-effect,version,vert-adv-y,vert-origin-x,` +
    `vert-origin-y,viewBox,viewTarget,visibility,width,widths,word-spacing,` +
    `writing-mode,x,x-height,x1,x2,xChannelSelector,xlink:actuate,xlink:arcrole,` +
    `xlink:href,xlink:role,xlink:show,xlink:title,xlink:type,xml:base,xml:lang,` +
    `xml:space,y,y1,y2,yChannelSelector,z,zoomAndPan`);

function normalizeStyle(value) {
    if (isArray(value)) {
        const res = {};
        for (let i = 0; i < value.length; i++) {
            const item = value[i];
            const normalized = isString(item)
                ? parseStringStyle(item)
                : normalizeStyle(item);
            if (normalized) {
                for (const key in normalized) {
                    res[key] = normalized[key];
                }
            }
        }
        return res;
    }
    else if (isString(value)) {
        return value;
    }
    else if (isObject(value)) {
        return value;
    }
}
const listDelimiterRE = /;(?![^(]*\))/g;
const propertyDelimiterRE = /:(.+)/;
function parseStringStyle(cssText) {
    const ret = {};
    cssText.split(listDelimiterRE).forEach(item => {
        if (item) {
            const tmp = item.split(propertyDelimiterRE);
            tmp.length > 1 && (ret[tmp[0].trim()] = tmp[1].trim());
        }
    });
    return ret;
}
function stringifyStyle(styles) {
    let ret = '';
    if (!styles || isString(styles)) {
        return ret;
    }
    for (const key in styles) {
        const value = styles[key];
        const normalizedKey = key.startsWith(`--`) ? key : hyphenate(key);
        if (isString(value) ||
            (typeof value === 'number' && isNoUnitNumericStyleProp(normalizedKey))) {
            // only render valid values
            ret += `${normalizedKey}:${value};`;
        }
    }
    return ret;
}
function normalizeClass(value) {
    let res = '';
    if (isString(value)) {
        res = value;
    }
    else if (isArray(value)) {
        for (let i = 0; i < value.length; i++) {
            const normalized = normalizeClass(value[i]);
            if (normalized) {
                res += normalized + ' ';
            }
        }
    }
    else if (isObject(value)) {
        for (const name in value) {
            if (value[name]) {
                res += name + ' ';
            }
        }
    }
    return res.trim();
}

// These tag configs are shared between compiler-dom and runtime-dom, so they
// https://developer.mozilla.org/en-US/docs/Web/HTML/Element
const HTML_TAGS = 'html,body,base,head,link,meta,style,title,address,article,aside,footer,' +
    'header,h1,h2,h3,h4,h5,h6,nav,section,div,dd,dl,dt,figcaption,' +
    'figure,picture,hr,img,li,main,ol,p,pre,ul,a,b,abbr,bdi,bdo,br,cite,code,' +
    'data,dfn,em,i,kbd,mark,q,rp,rt,ruby,s,samp,small,span,strong,sub,sup,' +
    'time,u,var,wbr,area,audio,map,track,video,embed,object,param,source,' +
    'canvas,script,noscript,del,ins,caption,col,colgroup,table,thead,tbody,td,' +
    'th,tr,button,datalist,fieldset,form,input,label,legend,meter,optgroup,' +
    'option,output,progress,select,textarea,details,dialog,menu,' +
    'summary,template,blockquote,iframe,tfoot';
// https://developer.mozilla.org/en-US/docs/Web/SVG/Element
const SVG_TAGS = 'svg,animate,animateMotion,animateTransform,circle,clipPath,color-profile,' +
    'defs,desc,discard,ellipse,feBlend,feColorMatrix,feComponentTransfer,' +
    'feComposite,feConvolveMatrix,feDiffuseLighting,feDisplacementMap,' +
    'feDistanceLight,feDropShadow,feFlood,feFuncA,feFuncB,feFuncG,feFuncR,' +
    'feGaussianBlur,feImage,feMerge,feMergeNode,feMorphology,feOffset,' +
    'fePointLight,feSpecularLighting,feSpotLight,feTile,feTurbulence,filter,' +
    'foreignObject,g,hatch,hatchpath,image,line,linearGradient,marker,mask,' +
    'mesh,meshgradient,meshpatch,meshrow,metadata,mpath,path,pattern,' +
    'polygon,polyline,radialGradient,rect,set,solidcolor,stop,switch,symbol,' +
    'text,textPath,title,tspan,unknown,use,view';
const VOID_TAGS = 'area,base,br,col,embed,hr,img,input,link,meta,param,source,track,wbr';
/**
 * Compiler only.
 * Do NOT use in runtime code paths unless behind `true` flag.
 */
const isHTMLTag = /*#__PURE__*/ makeMap(HTML_TAGS);
/**
 * Compiler only.
 * Do NOT use in runtime code paths unless behind `true` flag.
 */
const isSVGTag = /*#__PURE__*/ makeMap(SVG_TAGS);
/**
 * Compiler only.
 * Do NOT use in runtime code paths unless behind `true` flag.
 */
const isVoidTag = /*#__PURE__*/ makeMap(VOID_TAGS);

const escapeRE = /["'&<>]/;
function escapeHtml(string) {
    const str = '' + string;
    const match = escapeRE.exec(str);
    if (!match) {
        return str;
    }
    let html = '';
    let escaped;
    let index;
    let lastIndex = 0;
    for (index = match.index; index < str.length; index++) {
        switch (str.charCodeAt(index)) {
            case 34: // "
                escaped = '&quot;';
                break;
            case 38: // &
                escaped = '&amp;';
                break;
            case 39: // '
                escaped = '&#39;';
                break;
            case 60: // <
                escaped = '&lt;';
                break;
            case 62: // >
                escaped = '&gt;';
                break;
            default:
                continue;
        }
        if (lastIndex !== index) {
            html += str.slice(lastIndex, index);
        }
        lastIndex = index + 1;
        html += escaped;
    }
    return lastIndex !== index ? html + str.slice(lastIndex, index) : html;
}

/**
 * For converting {{ interpolation }} values to displayed strings.
 * @private
 */
const toDisplayString = (val) => {
    return isString(val)
        ? val
        : val == null
            ? ''
            : isArray(val) ||
                (isObject(val) &&
                    (val.toString === objectToString || !isFunction(val.toString)))
                ? JSON.stringify(val, replacer, 2)
                : String(val);
};
const replacer = (_key, val) => {
    // can't use isRef here since @vue/shared has no deps
    if (val && val.__v_isRef) {
        return replacer(_key, val.value);
    }
    else if (isMap(val)) {
        return {
            [`Map(${val.size})`]: [...val.entries()].reduce((entries, [key, val]) => {
                entries[`${key} =>`] = val;
                return entries;
            }, {})
        };
    }
    else if (isSet(val)) {
        return {
            [`Set(${val.size})`]: [...val.values()]
        };
    }
    else if (isObject(val) && !isArray(val) && !isPlainObject(val)) {
        return String(val);
    }
    return val;
};

const EMPTY_OBJ = Object.freeze({})
    ;
Object.freeze([]) ;
const NOOP = () => { };
/**
 * Always return false.
 */
const NO = () => false;
const onRE = /^on[^a-z]/;
const isOn = (key) => onRE.test(key);
const extend = Object.assign;
const hasOwnProperty = Object.prototype.hasOwnProperty;
const hasOwn = (val, key) => hasOwnProperty.call(val, key);
const isArray = Array.isArray;
const isMap = (val) => toTypeString(val) === '[object Map]';
const isSet = (val) => toTypeString(val) === '[object Set]';
const isFunction = (val) => typeof val === 'function';
const isString = (val) => typeof val === 'string';
const isSymbol = (val) => typeof val === 'symbol';
const isObject = (val) => val !== null && typeof val === 'object';
const objectToString = Object.prototype.toString;
const toTypeString = (value) => objectToString.call(value);
const isPlainObject = (val) => toTypeString(val) === '[object Object]';
const isReservedProp = /*#__PURE__*/ makeMap(
// the leading comma is intentional so empty string "" is also included
',key,ref,ref_for,ref_key,' +
    'onVnodeBeforeMount,onVnodeMounted,' +
    'onVnodeBeforeUpdate,onVnodeUpdated,' +
    'onVnodeBeforeUnmount,onVnodeUnmounted');
const isBuiltInDirective = /*#__PURE__*/ makeMap('bind,cloak,else-if,else,for,html,if,model,on,once,pre,show,slot,text,memo');
const cacheStringFunction = (fn) => {
    const cache = Object.create(null);
    return ((str) => {
        const hit = cache[str];
        return hit || (cache[str] = fn(str));
    });
};
const camelizeRE = /-(\w)/g;
/**
 * @private
 */
const camelize = cacheStringFunction((str) => {
    return str.replace(camelizeRE, (_, c) => (c ? c.toUpperCase() : ''));
});
const hyphenateRE = /\B([A-Z])/g;
/**
 * @private
 */
const hyphenate = cacheStringFunction((str) => str.replace(hyphenateRE, '-$1').toLowerCase());
/**
 * @private
 */
const capitalize = cacheStringFunction((str) => str.charAt(0).toUpperCase() + str.slice(1));
/**
 * @private
 */
const toHandlerKey = cacheStringFunction((str) => str ? `on${capitalize(str)}` : ``);
const identRE = /^[_$a-zA-Z\xA0-\uFFFF][_$a-zA-Z0-9\xA0-\uFFFF]*$/;
function genPropsAccessExp(name) {
    return identRE.test(name)
        ? `__props.${name}`
        : `__props[${JSON.stringify(name)}]`;
}

function defaultOnError(error) {
    throw error;
}
function defaultOnWarn(msg) {
    console.warn(`[Vue warn] ${msg.message}`);
}
function createCompilerError(code, loc, messages, additionalMessage) {
    const msg = (messages || errorMessages)[code] + (additionalMessage || ``)
        ;
    const error = new SyntaxError(String(msg));
    error.code = code;
    error.loc = loc;
    return error;
}
const errorMessages = {
    // parse errors
    [0 /* ABRUPT_CLOSING_OF_EMPTY_COMMENT */]: 'Illegal comment.',
    [1 /* CDATA_IN_HTML_CONTENT */]: 'CDATA section is allowed only in XML context.',
    [2 /* DUPLICATE_ATTRIBUTE */]: 'Duplicate attribute.',
    [3 /* END_TAG_WITH_ATTRIBUTES */]: 'End tag cannot have attributes.',
    [4 /* END_TAG_WITH_TRAILING_SOLIDUS */]: "Illegal '/' in tags.",
    [5 /* EOF_BEFORE_TAG_NAME */]: 'Unexpected EOF in tag.',
    [6 /* EOF_IN_CDATA */]: 'Unexpected EOF in CDATA section.',
    [7 /* EOF_IN_COMMENT */]: 'Unexpected EOF in comment.',
    [8 /* EOF_IN_SCRIPT_HTML_COMMENT_LIKE_TEXT */]: 'Unexpected EOF in script.',
    [9 /* EOF_IN_TAG */]: 'Unexpected EOF in tag.',
    [10 /* INCORRECTLY_CLOSED_COMMENT */]: 'Incorrectly closed comment.',
    [11 /* INCORRECTLY_OPENED_COMMENT */]: 'Incorrectly opened comment.',
    [12 /* INVALID_FIRST_CHARACTER_OF_TAG_NAME */]: "Illegal tag name. Use '&lt;' to print '<'.",
    [13 /* MISSING_ATTRIBUTE_VALUE */]: 'Attribute value was expected.',
    [14 /* MISSING_END_TAG_NAME */]: 'End tag name was expected.',
    [15 /* MISSING_WHITESPACE_BETWEEN_ATTRIBUTES */]: 'Whitespace was expected.',
    [16 /* NESTED_COMMENT */]: "Unexpected '<!--' in comment.",
    [17 /* UNEXPECTED_CHARACTER_IN_ATTRIBUTE_NAME */]: 'Attribute name cannot contain U+0022 ("), U+0027 (\'), and U+003C (<).',
    [18 /* UNEXPECTED_CHARACTER_IN_UNQUOTED_ATTRIBUTE_VALUE */]: 'Unquoted attribute value cannot contain U+0022 ("), U+0027 (\'), U+003C (<), U+003D (=), and U+0060 (`).',
    [19 /* UNEXPECTED_EQUALS_SIGN_BEFORE_ATTRIBUTE_NAME */]: "Attribute name cannot start with '='.",
    [21 /* UNEXPECTED_QUESTION_MARK_INSTEAD_OF_TAG_NAME */]: "'<?' is allowed only in XML context.",
    [20 /* UNEXPECTED_NULL_CHARACTER */]: `Unexpected null character.`,
    [22 /* UNEXPECTED_SOLIDUS_IN_TAG */]: "Illegal '/' in tags.",
    // Vue-specific parse errors
    [23 /* X_INVALID_END_TAG */]: 'Invalid end tag.',
    [24 /* X_MISSING_END_TAG */]: 'Element is missing end tag.',
    [25 /* X_MISSING_INTERPOLATION_END */]: 'Interpolation end sign was not found.',
    [27 /* X_MISSING_DYNAMIC_DIRECTIVE_ARGUMENT_END */]: 'End bracket for dynamic directive argument was not found. ' +
        'Note that dynamic directive argument cannot contain spaces.',
    [26 /* X_MISSING_DIRECTIVE_NAME */]: 'Legal directive name was expected.',
    // transform errors
    [28 /* X_V_IF_NO_EXPRESSION */]: `v-if/v-else-if is missing expression.`,
    [29 /* X_V_IF_SAME_KEY */]: `v-if/else branches must use unique keys.`,
    [30 /* X_V_ELSE_NO_ADJACENT_IF */]: `v-else/v-else-if has no adjacent v-if or v-else-if.`,
    [31 /* X_V_FOR_NO_EXPRESSION */]: `v-for is missing expression.`,
    [32 /* X_V_FOR_MALFORMED_EXPRESSION */]: `v-for has invalid expression.`,
    [33 /* X_V_FOR_TEMPLATE_KEY_PLACEMENT */]: `<template v-for> key should be placed on the <template> tag.`,
    [34 /* X_V_BIND_NO_EXPRESSION */]: `v-bind is missing expression.`,
    [35 /* X_V_ON_NO_EXPRESSION */]: `v-on is missing expression.`,
    [36 /* X_V_SLOT_UNEXPECTED_DIRECTIVE_ON_SLOT_OUTLET */]: `Unexpected custom directive on <slot> outlet.`,
    [37 /* X_V_SLOT_MIXED_SLOT_USAGE */]: `Mixed v-slot usage on both the component and nested <template>.` +
        `When there are multiple named slots, all slots should use <template> ` +
        `syntax to avoid scope ambiguity.`,
    [38 /* X_V_SLOT_DUPLICATE_SLOT_NAMES */]: `Duplicate slot names found. `,
    [39 /* X_V_SLOT_EXTRANEOUS_DEFAULT_SLOT_CHILDREN */]: `Extraneous children found when component already has explicitly named ` +
        `default slot. These children will be ignored.`,
    [40 /* X_V_SLOT_MISPLACED */]: `v-slot can only be used on components or <template> tags.`,
    [41 /* X_V_MODEL_NO_EXPRESSION */]: `v-model is missing expression.`,
    [42 /* X_V_MODEL_MALFORMED_EXPRESSION */]: `v-model value must be a valid JavaScript member expression.`,
    [43 /* X_V_MODEL_ON_SCOPE_VARIABLE */]: `v-model cannot be used on v-for or v-slot scope variables because they are not writable.`,
    [44 /* X_INVALID_EXPRESSION */]: `Error parsing JavaScript expression: `,
    [45 /* X_KEEP_ALIVE_INVALID_CHILDREN */]: `<KeepAlive> expects exactly one child component.`,
    // generic errors
    [46 /* X_PREFIX_ID_NOT_SUPPORTED */]: `"prefixIdentifiers" option is not supported in this build of compiler.`,
    [47 /* X_MODULE_MODE_NOT_SUPPORTED */]: `ES module mode is not supported in this build of compiler.`,
    [48 /* X_CACHE_HANDLER_NOT_SUPPORTED */]: `"cacheHandlers" option is only supported when the "prefixIdentifiers" option is enabled.`,
    [49 /* X_SCOPE_ID_NOT_SUPPORTED */]: `"scopeId" option is only supported in module mode.`,
    // just to fulfill types
    [50 /* __EXTEND_POINT__ */]: ``
};

const FRAGMENT = Symbol(`Fragment` );
const TELEPORT = Symbol(`Teleport` );
const SUSPENSE = Symbol(`Suspense` );
const KEEP_ALIVE = Symbol(`KeepAlive` );
const BASE_TRANSITION = Symbol(`BaseTransition` );
const OPEN_BLOCK = Symbol(`openBlock` );
const CREATE_BLOCK = Symbol(`createBlock` );
const CREATE_ELEMENT_BLOCK = Symbol(`createElementBlock` );
const CREATE_VNODE = Symbol(`createVNode` );
const CREATE_ELEMENT_VNODE = Symbol(`createElementVNode` );
const CREATE_COMMENT = Symbol(`createCommentVNode` );
const CREATE_TEXT = Symbol(`createTextVNode` );
const CREATE_STATIC = Symbol(`createStaticVNode` );
const RESOLVE_COMPONENT = Symbol(`resolveComponent` );
const RESOLVE_DYNAMIC_COMPONENT = Symbol(`resolveDynamicComponent` );
const RESOLVE_DIRECTIVE = Symbol(`resolveDirective` );
const RESOLVE_FILTER = Symbol(`resolveFilter` );
const WITH_DIRECTIVES = Symbol(`withDirectives` );
const RENDER_LIST = Symbol(`renderList` );
const RENDER_SLOT = Symbol(`renderSlot` );
const CREATE_SLOTS = Symbol(`createSlots` );
const TO_DISPLAY_STRING = Symbol(`toDisplayString` );
const MERGE_PROPS = Symbol(`mergeProps` );
const NORMALIZE_CLASS = Symbol(`normalizeClass` );
const NORMALIZE_STYLE = Symbol(`normalizeStyle` );
const NORMALIZE_PROPS = Symbol(`normalizeProps` );
const GUARD_REACTIVE_PROPS = Symbol(`guardReactiveProps` );
const TO_HANDLERS = Symbol(`toHandlers` );
const CAMELIZE = Symbol(`camelize` );
const CAPITALIZE = Symbol(`capitalize` );
const TO_HANDLER_KEY = Symbol(`toHandlerKey` );
const SET_BLOCK_TRACKING = Symbol(`setBlockTracking` );
const PUSH_SCOPE_ID = Symbol(`pushScopeId` );
const POP_SCOPE_ID = Symbol(`popScopeId` );
const WITH_CTX = Symbol(`withCtx` );
const UNREF = Symbol(`unref` );
const IS_REF = Symbol(`isRef` );
const WITH_MEMO = Symbol(`withMemo` );
const IS_MEMO_SAME = Symbol(`isMemoSame` );
// Name mapping for runtime helpers that need to be imported from 'vue' in
// generated code. Make sure these are correctly exported in the runtime!
// Using `any` here because TS doesn't allow symbols as index type.
const helperNameMap = {
    [FRAGMENT]: `Fragment`,
    [TELEPORT]: `Teleport`,
    [SUSPENSE]: `Suspense`,
    [KEEP_ALIVE]: `KeepAlive`,
    [BASE_TRANSITION]: `BaseTransition`,
    [OPEN_BLOCK]: `openBlock`,
    [CREATE_BLOCK]: `createBlock`,
    [CREATE_ELEMENT_BLOCK]: `createElementBlock`,
    [CREATE_VNODE]: `createVNode`,
    [CREATE_ELEMENT_VNODE]: `createElementVNode`,
    [CREATE_COMMENT]: `createCommentVNode`,
    [CREATE_TEXT]: `createTextVNode`,
    [CREATE_STATIC]: `createStaticVNode`,
    [RESOLVE_COMPONENT]: `resolveComponent`,
    [RESOLVE_DYNAMIC_COMPONENT]: `resolveDynamicComponent`,
    [RESOLVE_DIRECTIVE]: `resolveDirective`,
    [RESOLVE_FILTER]: `resolveFilter`,
    [WITH_DIRECTIVES]: `withDirectives`,
    [RENDER_LIST]: `renderList`,
    [RENDER_SLOT]: `renderSlot`,
    [CREATE_SLOTS]: `createSlots`,
    [TO_DISPLAY_STRING]: `toDisplayString`,
    [MERGE_PROPS]: `mergeProps`,
    [NORMALIZE_CLASS]: `normalizeClass`,
    [NORMALIZE_STYLE]: `normalizeStyle`,
    [NORMALIZE_PROPS]: `normalizeProps`,
    [GUARD_REACTIVE_PROPS]: `guardReactiveProps`,
    [TO_HANDLERS]: `toHandlers`,
    [CAMELIZE]: `camelize`,
    [CAPITALIZE]: `capitalize`,
    [TO_HANDLER_KEY]: `toHandlerKey`,
    [SET_BLOCK_TRACKING]: `setBlockTracking`,
    [PUSH_SCOPE_ID]: `pushScopeId`,
    [POP_SCOPE_ID]: `popScopeId`,
    [WITH_CTX]: `withCtx`,
    [UNREF]: `unref`,
    [IS_REF]: `isRef`,
    [WITH_MEMO]: `withMemo`,
    [IS_MEMO_SAME]: `isMemoSame`
};
function registerRuntimeHelpers(helpers) {
    Object.getOwnPropertySymbols(helpers).forEach(s => {
        helperNameMap[s] = helpers[s];
    });
}

// AST Utilities ---------------------------------------------------------------
// Some expressions, e.g. sequence and conditional expressions, are never
// associated with template nodes, so their source locations are just a stub.
// Container types like CompoundExpression also don't need a real location.
const locStub = {
    source: '',
    start: { line: 1, column: 1, offset: 0 },
    end: { line: 1, column: 1, offset: 0 }
};
function createRoot(children, loc = locStub) {
    return {
        type: 0 /* ROOT */,
        children,
        helpers: [],
        components: [],
        directives: [],
        hoists: [],
        imports: [],
        cached: 0,
        temps: 0,
        codegenNode: undefined,
        loc
    };
}
function createVNodeCall(context, tag, props, children, patchFlag, dynamicProps, directives, isBlock = false, disableTracking = false, isComponent = false, loc = locStub) {
    if (context) {
        if (isBlock) {
            context.helper(OPEN_BLOCK);
            context.helper(getVNodeBlockHelper(context.inSSR, isComponent));
        }
        else {
            context.helper(getVNodeHelper(context.inSSR, isComponent));
        }
        if (directives) {
            context.helper(WITH_DIRECTIVES);
        }
    }
    return {
        type: 13 /* VNODE_CALL */,
        tag,
        props,
        children,
        patchFlag,
        dynamicProps,
        directives,
        isBlock,
        disableTracking,
        isComponent,
        loc
    };
}
function createArrayExpression(elements, loc = locStub) {
    return {
        type: 17 /* JS_ARRAY_EXPRESSION */,
        loc,
        elements
    };
}
function createObjectExpression(properties, loc = locStub) {
    return {
        type: 15 /* JS_OBJECT_EXPRESSION */,
        loc,
        properties
    };
}
function createObjectProperty(key, value) {
    return {
        type: 16 /* JS_PROPERTY */,
        loc: locStub,
        key: isString(key) ? createSimpleExpression(key, true) : key,
        value
    };
}
function createSimpleExpression(content, isStatic = false, loc = locStub, constType = 0 /* NOT_CONSTANT */) {
    return {
        type: 4 /* SIMPLE_EXPRESSION */,
        loc,
        content,
        isStatic,
        constType: isStatic ? 3 /* CAN_STRINGIFY */ : constType
    };
}
function createInterpolation(content, loc) {
    return {
        type: 5 /* INTERPOLATION */,
        loc,
        content: isString(content)
            ? createSimpleExpression(content, false, loc)
            : content
    };
}
function createCompoundExpression(children, loc = locStub) {
    return {
        type: 8 /* COMPOUND_EXPRESSION */,
        loc,
        children
    };
}
function createCallExpression(callee, args = [], loc = locStub) {
    return {
        type: 14 /* JS_CALL_EXPRESSION */,
        loc,
        callee,
        arguments: args
    };
}
function createFunctionExpression(params, returns = undefined, newline = false, isSlot = false, loc = locStub) {
    return {
        type: 18 /* JS_FUNCTION_EXPRESSION */,
        params,
        returns,
        newline,
        isSlot,
        loc
    };
}
function createConditionalExpression(test, consequent, alternate, newline = true) {
    return {
        type: 19 /* JS_CONDITIONAL_EXPRESSION */,
        test,
        consequent,
        alternate,
        newline,
        loc: locStub
    };
}
function createCacheExpression(index, value, isVNode = false) {
    return {
        type: 20 /* JS_CACHE_EXPRESSION */,
        index,
        value,
        isVNode,
        loc: locStub
    };
}
function createBlockStatement(body) {
    return {
        type: 21 /* JS_BLOCK_STATEMENT */,
        body,
        loc: locStub
    };
}
function createTemplateLiteral(elements) {
    return {
        type: 22 /* JS_TEMPLATE_LITERAL */,
        elements,
        loc: locStub
    };
}
function createIfStatement(test, consequent, alternate) {
    return {
        type: 23 /* JS_IF_STATEMENT */,
        test,
        consequent,
        alternate,
        loc: locStub
    };
}
function createAssignmentExpression(left, right) {
    return {
        type: 24 /* JS_ASSIGNMENT_EXPRESSION */,
        left,
        right,
        loc: locStub
    };
}
function createSequenceExpression(expressions) {
    return {
        type: 25 /* JS_SEQUENCE_EXPRESSION */,
        expressions,
        loc: locStub
    };
}
function createReturnStatement(returns) {
    return {
        type: 26 /* JS_RETURN_STATEMENT */,
        returns,
        loc: locStub
    };
}

const lineBreak = /\r\n?|[\n\u2028\u2029]/;
const lineBreakG = new RegExp(lineBreak.source, "g");
function isNewLine(code) {
  switch (code) {
    case 10:
    case 13:
    case 8232:
    case 8233:
      return true;

    default:
      return false;
  }
}
const skipWhiteSpace = /(?:\s|\/\/.*|\/\*[^]*?\*\/)*/g;
const skipWhiteSpaceInLine = /(?:[^\S\n\r\u2028\u2029]|\/\/.*|\/\*.*?\*\/)*/y;
const skipWhiteSpaceToLineBreak = new RegExp("(?=(" + skipWhiteSpaceInLine.source + "))\\1" + /(?=[\n\r\u2028\u2029]|\/\*(?!.*?\*\/)|$)/.source, "y");
function isWhitespace(code) {
  switch (code) {
    case 0x0009:
    case 0x000b:
    case 0x000c:
    case 32:
    case 160:
    case 5760:
    case 0x2000:
    case 0x2001:
    case 0x2002:
    case 0x2003:
    case 0x2004:
    case 0x2005:
    case 0x2006:
    case 0x2007:
    case 0x2008:
    case 0x2009:
    case 0x200a:
    case 0x202f:
    case 0x205f:
    case 0x3000:
    case 0xfeff:
      return true;

    default:
      return false;
  }
}

class Position {
  constructor(line, col) {
    this.line = void 0;
    this.column = void 0;
    this.line = line;
    this.column = col;
  }

}
class SourceLocation {
  constructor(start, end) {
    this.start = void 0;
    this.end = void 0;
    this.filename = void 0;
    this.identifierName = void 0;
    this.start = start;
    this.end = end;
  }

}
function getLineInfo(input, offset) {
  let line = 1;
  let lineStart = 0;
  let match;
  lineBreakG.lastIndex = 0;

  while ((match = lineBreakG.exec(input)) && match.index < offset) {
    line++;
    lineStart = lineBreakG.lastIndex;
  }

  return new Position(line, offset - lineStart);
}

class BaseParser {
  constructor() {
    this.sawUnambiguousESM = false;
    this.ambiguousScriptDifferentAst = false;
  }

  hasPlugin(name) {
    return this.plugins.has(name);
  }

  getPluginOption(plugin, name) {
    if (this.hasPlugin(plugin)) return this.plugins.get(plugin)[name];
  }

}

function setTrailingComments(node, comments) {
  if (node.trailingComments === undefined) {
    node.trailingComments = comments;
  } else {
    node.trailingComments.unshift(...comments);
  }
}

function setLeadingComments(node, comments) {
  if (node.leadingComments === undefined) {
    node.leadingComments = comments;
  } else {
    node.leadingComments.unshift(...comments);
  }
}

function setInnerComments(node, comments) {
  if (node.innerComments === undefined) {
    node.innerComments = comments;
  } else {
    node.innerComments.unshift(...comments);
  }
}

function adjustInnerComments(node, elements, commentWS) {
  let lastElement = null;
  let i = elements.length;

  while (lastElement === null && i > 0) {
    lastElement = elements[--i];
  }

  if (lastElement === null || lastElement.start > commentWS.start) {
    setInnerComments(node, commentWS.comments);
  } else {
    setTrailingComments(lastElement, commentWS.comments);
  }
}

class CommentsParser extends BaseParser {
  addComment(comment) {
    if (this.filename) comment.loc.filename = this.filename;
    this.state.comments.push(comment);
  }

  processComment(node) {
    const {
      commentStack
    } = this.state;
    const commentStackLength = commentStack.length;
    if (commentStackLength === 0) return;
    let i = commentStackLength - 1;
    const lastCommentWS = commentStack[i];

    if (lastCommentWS.start === node.end) {
      lastCommentWS.leadingNode = node;
      i--;
    }

    const {
      start: nodeStart
    } = node;

    for (; i >= 0; i--) {
      const commentWS = commentStack[i];
      const commentEnd = commentWS.end;

      if (commentEnd > nodeStart) {
        commentWS.containingNode = node;
        this.finalizeComment(commentWS);
        commentStack.splice(i, 1);
      } else {
        if (commentEnd === nodeStart) {
          commentWS.trailingNode = node;
        }

        break;
      }
    }
  }

  finalizeComment(commentWS) {
    const {
      comments
    } = commentWS;

    if (commentWS.leadingNode !== null || commentWS.trailingNode !== null) {
      if (commentWS.leadingNode !== null) {
        setTrailingComments(commentWS.leadingNode, comments);
      }

      if (commentWS.trailingNode !== null) {
        setLeadingComments(commentWS.trailingNode, comments);
      }
    } else {
      const {
        containingNode: node,
        start: commentStart
      } = commentWS;

      if (this.input.charCodeAt(commentStart - 1) === 44) {
        switch (node.type) {
          case "ObjectExpression":
          case "ObjectPattern":
          case "RecordExpression":
            adjustInnerComments(node, node.properties, commentWS);
            break;

          case "CallExpression":
          case "OptionalCallExpression":
            adjustInnerComments(node, node.arguments, commentWS);
            break;

          case "FunctionDeclaration":
          case "FunctionExpression":
          case "ArrowFunctionExpression":
          case "ObjectMethod":
          case "ClassMethod":
          case "ClassPrivateMethod":
            adjustInnerComments(node, node.params, commentWS);
            break;

          case "ArrayExpression":
          case "ArrayPattern":
          case "TupleExpression":
            adjustInnerComments(node, node.elements, commentWS);
            break;

          case "ExportNamedDeclaration":
          case "ImportDeclaration":
            adjustInnerComments(node, node.specifiers, commentWS);
            break;

          default:
            {
              setInnerComments(node, comments);
            }
        }
      } else {
        setInnerComments(node, comments);
      }
    }
  }

  finalizeRemainingComments() {
    const {
      commentStack
    } = this.state;

    for (let i = commentStack.length - 1; i >= 0; i--) {
      this.finalizeComment(commentStack[i]);
    }

    this.state.commentStack = [];
  }

  resetPreviousNodeTrailingComments(node) {
    const {
      commentStack
    } = this.state;
    const {
      length
    } = commentStack;
    if (length === 0) return;
    const commentWS = commentStack[length - 1];

    if (commentWS.leadingNode === node) {
      commentWS.leadingNode = null;
    }
  }

  takeSurroundingComments(node, start, end) {
    const {
      commentStack
    } = this.state;
    const commentStackLength = commentStack.length;
    if (commentStackLength === 0) return;
    let i = commentStackLength - 1;

    for (; i >= 0; i--) {
      const commentWS = commentStack[i];
      const commentEnd = commentWS.end;
      const commentStart = commentWS.start;

      if (commentStart === end) {
        commentWS.leadingNode = node;
      } else if (commentEnd === start) {
        commentWS.trailingNode = node;
      } else if (commentEnd < start) {
        break;
      }
    }
  }

}

const ErrorCodes = Object.freeze({
  SyntaxError: "BABEL_PARSER_SYNTAX_ERROR",
  SourceTypeModuleError: "BABEL_PARSER_SOURCETYPE_MODULE_REQUIRED"
});

const ErrorMessages = makeErrorTemplates({
  AccessorIsGenerator: "A %0ter cannot be a generator.",
  ArgumentsInClass: "'arguments' is only allowed in functions and class methods.",
  AsyncFunctionInSingleStatementContext: "Async functions can only be declared at the top level or inside a block.",
  AwaitBindingIdentifier: "Can not use 'await' as identifier inside an async function.",
  AwaitBindingIdentifierInStaticBlock: "Can not use 'await' as identifier inside a static block.",
  AwaitExpressionFormalParameter: "'await' is not allowed in async function parameters.",
  AwaitNotInAsyncContext: "'await' is only allowed within async functions and at the top levels of modules.",
  AwaitNotInAsyncFunction: "'await' is only allowed within async functions.",
  BadGetterArity: "A 'get' accesor must not have any formal parameters.",
  BadSetterArity: "A 'set' accesor must have exactly one formal parameter.",
  BadSetterRestParameter: "A 'set' accesor function argument must not be a rest parameter.",
  ConstructorClassField: "Classes may not have a field named 'constructor'.",
  ConstructorClassPrivateField: "Classes may not have a private field named '#constructor'.",
  ConstructorIsAccessor: "Class constructor may not be an accessor.",
  ConstructorIsAsync: "Constructor can't be an async function.",
  ConstructorIsGenerator: "Constructor can't be a generator.",
  DeclarationMissingInitializer: "'%0' require an initialization value.",
  DecoratorBeforeExport: "Decorators must be placed *before* the 'export' keyword. You can set the 'decoratorsBeforeExport' option to false to use the 'export @decorator class {}' syntax.",
  DecoratorConstructor: "Decorators can't be used with a constructor. Did you mean '@dec class { ... }'?",
  DecoratorExportClass: "Using the export keyword between a decorator and a class is not allowed. Please use `export @dec class` instead.",
  DecoratorSemicolon: "Decorators must not be followed by a semicolon.",
  DecoratorStaticBlock: "Decorators can't be used with a static block.",
  DeletePrivateField: "Deleting a private field is not allowed.",
  DestructureNamedImport: "ES2015 named imports do not destructure. Use another statement for destructuring after the import.",
  DuplicateConstructor: "Duplicate constructor in the same class.",
  DuplicateDefaultExport: "Only one default export allowed per module.",
  DuplicateExport: "`%0` has already been exported. Exported identifiers must be unique.",
  DuplicateProto: "Redefinition of __proto__ property.",
  DuplicateRegExpFlags: "Duplicate regular expression flag.",
  ElementAfterRest: "Rest element must be last element.",
  EscapedCharNotAnIdentifier: "Invalid Unicode escape.",
  ExportBindingIsString: "A string literal cannot be used as an exported binding without `from`.\n- Did you mean `export { '%0' as '%1' } from 'some-module'`?",
  ExportDefaultFromAsIdentifier: "'from' is not allowed as an identifier after 'export default'.",
  ForInOfLoopInitializer: "'%0' loop variable declaration may not have an initializer.",
  ForOfAsync: "The left-hand side of a for-of loop may not be 'async'.",
  ForOfLet: "The left-hand side of a for-of loop may not start with 'let'.",
  GeneratorInSingleStatementContext: "Generators can only be declared at the top level or inside a block.",
  IllegalBreakContinue: "Unsyntactic %0.",
  IllegalLanguageModeDirective: "Illegal 'use strict' directive in function with non-simple parameter list.",
  IllegalReturn: "'return' outside of function.",
  ImportBindingIsString: 'A string literal cannot be used as an imported binding.\n- Did you mean `import { "%0" as foo }`?',
  ImportCallArgumentTrailingComma: "Trailing comma is disallowed inside import(...) arguments.",
  ImportCallArity: "`import()` requires exactly %0.",
  ImportCallNotNewExpression: "Cannot use new with import(...).",
  ImportCallSpreadArgument: "`...` is not allowed in `import()`.",
  InvalidBigIntLiteral: "Invalid BigIntLiteral.",
  InvalidCodePoint: "Code point out of bounds.",
  InvalidDecimal: "Invalid decimal.",
  InvalidDigit: "Expected number in radix %0.",
  InvalidEscapeSequence: "Bad character escape sequence.",
  InvalidEscapeSequenceTemplate: "Invalid escape sequence in template.",
  InvalidEscapedReservedWord: "Escape sequence in keyword %0.",
  InvalidIdentifier: "Invalid identifier %0.",
  InvalidLhs: "Invalid left-hand side in %0.",
  InvalidLhsBinding: "Binding invalid left-hand side in %0.",
  InvalidNumber: "Invalid number.",
  InvalidOrMissingExponent: "Floating-point numbers require a valid exponent after the 'e'.",
  InvalidOrUnexpectedToken: "Unexpected character '%0'.",
  InvalidParenthesizedAssignment: "Invalid parenthesized assignment pattern.",
  InvalidPrivateFieldResolution: "Private name #%0 is not defined.",
  InvalidPropertyBindingPattern: "Binding member expression.",
  InvalidRecordProperty: "Only properties and spread elements are allowed in record definitions.",
  InvalidRestAssignmentPattern: "Invalid rest operator's argument.",
  LabelRedeclaration: "Label '%0' is already declared.",
  LetInLexicalBinding: "'let' is not allowed to be used as a name in 'let' or 'const' declarations.",
  LineTerminatorBeforeArrow: "No line break is allowed before '=>'.",
  MalformedRegExpFlags: "Invalid regular expression flag.",
  MissingClassName: "A class name is required.",
  MissingEqInAssignment: "Only '=' operator can be used for specifying default value.",
  MissingSemicolon: "Missing semicolon.",
  MissingUnicodeEscape: "Expecting Unicode escape sequence \\uXXXX.",
  MixingCoalesceWithLogical: "Nullish coalescing operator(??) requires parens when mixing with logical operators.",
  ModuleAttributeDifferentFromType: "The only accepted module attribute is `type`.",
  ModuleAttributeInvalidValue: "Only string literals are allowed as module attribute values.",
  ModuleAttributesWithDuplicateKeys: 'Duplicate key "%0" is not allowed in module attributes.',
  ModuleExportNameHasLoneSurrogate: "An export name cannot include a lone surrogate, found '\\u%0'.",
  ModuleExportUndefined: "Export '%0' is not defined.",
  MultipleDefaultsInSwitch: "Multiple default clauses.",
  NewlineAfterThrow: "Illegal newline after throw.",
  NoCatchOrFinally: "Missing catch or finally clause.",
  NumberIdentifier: "Identifier directly after number.",
  NumericSeparatorInEscapeSequence: "Numeric separators are not allowed inside unicode escape sequences or hex escape sequences.",
  ObsoleteAwaitStar: "'await*' has been removed from the async functions proposal. Use Promise.all() instead.",
  OptionalChainingNoNew: "Constructors in/after an Optional Chain are not allowed.",
  OptionalChainingNoTemplate: "Tagged Template Literals are not allowed in optionalChain.",
  OverrideOnConstructor: "'override' modifier cannot appear on a constructor declaration.",
  ParamDupe: "Argument name clash.",
  PatternHasAccessor: "Object pattern can't contain getter or setter.",
  PatternHasMethod: "Object pattern can't contain methods.",
  PipeBodyIsTighter: "Unexpected %0 after pipeline body; any %0 expression acting as Hack-style pipe body must be parenthesized due to its loose operator precedence.",
  PipeTopicRequiresHackPipes: 'Topic reference is used, but the pipelineOperator plugin was not passed a "proposal": "hack" or "smart" option.',
  PipeTopicUnbound: "Topic reference is unbound; it must be inside a pipe body.",
  PipeTopicUnconfiguredToken: 'Invalid topic token %0. In order to use %0 as a topic reference, the pipelineOperator plugin must be configured with { "proposal": "hack", "topicToken": "%0" }.',
  PipeTopicUnused: "Hack-style pipe body does not contain a topic reference; Hack-style pipes must use topic at least once.",
  PipeUnparenthesizedBody: "Hack-style pipe body cannot be an unparenthesized %0 expression; please wrap it in parentheses.",
  PipelineBodyNoArrow: 'Unexpected arrow "=>" after pipeline body; arrow function in pipeline body must be parenthesized.',
  PipelineBodySequenceExpression: "Pipeline body may not be a comma-separated sequence expression.",
  PipelineHeadSequenceExpression: "Pipeline head should not be a comma-separated sequence expression.",
  PipelineTopicUnused: "Pipeline is in topic style but does not use topic reference.",
  PrimaryTopicNotAllowed: "Topic reference was used in a lexical context without topic binding.",
  PrimaryTopicRequiresSmartPipeline: 'Topic reference is used, but the pipelineOperator plugin was not passed a "proposal": "hack" or "smart" option.',
  PrivateInExpectedIn: "Private names are only allowed in property accesses (`obj.#%0`) or in `in` expressions (`#%0 in obj`).",
  PrivateNameRedeclaration: "Duplicate private name #%0.",
  RecordExpressionBarIncorrectEndSyntaxType: "Record expressions ending with '|}' are only allowed when the 'syntaxType' option of the 'recordAndTuple' plugin is set to 'bar'.",
  RecordExpressionBarIncorrectStartSyntaxType: "Record expressions starting with '{|' are only allowed when the 'syntaxType' option of the 'recordAndTuple' plugin is set to 'bar'.",
  RecordExpressionHashIncorrectStartSyntaxType: "Record expressions starting with '#{' are only allowed when the 'syntaxType' option of the 'recordAndTuple' plugin is set to 'hash'.",
  RecordNoProto: "'__proto__' is not allowed in Record expressions.",
  RestTrailingComma: "Unexpected trailing comma after rest element.",
  SloppyFunction: "In non-strict mode code, functions can only be declared at top level, inside a block, or as the body of an if statement.",
  StaticPrototype: "Classes may not have static property named prototype.",
  StrictDelete: "Deleting local variable in strict mode.",
  StrictEvalArguments: "Assigning to '%0' in strict mode.",
  StrictEvalArgumentsBinding: "Binding '%0' in strict mode.",
  StrictFunction: "In strict mode code, functions can only be declared at top level or inside a block.",
  StrictNumericEscape: "The only valid numeric escape in strict mode is '\\0'.",
  StrictOctalLiteral: "Legacy octal literals are not allowed in strict mode.",
  StrictWith: "'with' in strict mode.",
  SuperNotAllowed: "`super()` is only valid inside a class constructor of a subclass. Maybe a typo in the method name ('constructor') or not extending another class?",
  SuperPrivateField: "Private fields can't be accessed on super.",
  TrailingDecorator: "Decorators must be attached to a class element.",
  TupleExpressionBarIncorrectEndSyntaxType: "Tuple expressions ending with '|]' are only allowed when the 'syntaxType' option of the 'recordAndTuple' plugin is set to 'bar'.",
  TupleExpressionBarIncorrectStartSyntaxType: "Tuple expressions starting with '[|' are only allowed when the 'syntaxType' option of the 'recordAndTuple' plugin is set to 'bar'.",
  TupleExpressionHashIncorrectStartSyntaxType: "Tuple expressions starting with '#[' are only allowed when the 'syntaxType' option of the 'recordAndTuple' plugin is set to 'hash'.",
  UnexpectedArgumentPlaceholder: "Unexpected argument placeholder.",
  UnexpectedAwaitAfterPipelineBody: 'Unexpected "await" after pipeline body; await must have parentheses in minimal proposal.',
  UnexpectedDigitAfterHash: "Unexpected digit after hash token.",
  UnexpectedImportExport: "'import' and 'export' may only appear at the top level.",
  UnexpectedKeyword: "Unexpected keyword '%0'.",
  UnexpectedLeadingDecorator: "Leading decorators must be attached to a class declaration.",
  UnexpectedLexicalDeclaration: "Lexical declaration cannot appear in a single-statement context.",
  UnexpectedNewTarget: "`new.target` can only be used in functions or class properties.",
  UnexpectedNumericSeparator: "A numeric separator is only allowed between two digits.",
  UnexpectedPrivateField: "Private names can only be used as the name of a class element (i.e. class C { #p = 42; #m() {} } )\n or a property of member expression (i.e. this.#p).",
  UnexpectedReservedWord: "Unexpected reserved word '%0'.",
  UnexpectedSuper: "'super' is only allowed in object methods and classes.",
  UnexpectedToken: "Unexpected token '%0'.",
  UnexpectedTokenUnaryExponentiation: "Illegal expression. Wrap left hand side or entire exponentiation in parentheses.",
  UnsupportedBind: "Binding should be performed on object property.",
  UnsupportedDecoratorExport: "A decorated export must export a class declaration.",
  UnsupportedDefaultExport: "Only expressions, functions or classes are allowed as the `default` export.",
  UnsupportedImport: "`import` can only be used in `import()` or `import.meta`.",
  UnsupportedMetaProperty: "The only valid meta property for %0 is %0.%1.",
  UnsupportedParameterDecorator: "Decorators cannot be used to decorate parameters.",
  UnsupportedPropertyDecorator: "Decorators cannot be used to decorate object literal properties.",
  UnsupportedSuper: "'super' can only be used with function calls (i.e. super()) or in property accesses (i.e. super.prop or super[prop]).",
  UnterminatedComment: "Unterminated comment.",
  UnterminatedRegExp: "Unterminated regular expression.",
  UnterminatedString: "Unterminated string constant.",
  UnterminatedTemplate: "Unterminated template.",
  VarRedeclaration: "Identifier '%0' has already been declared.",
  YieldBindingIdentifier: "Can not use 'yield' as identifier inside a generator.",
  YieldInParameter: "Yield expression is not allowed in formal parameters.",
  ZeroDigitNumericSeparator: "Numeric separator can not be used after leading 0."
}, ErrorCodes.SyntaxError);
const SourceTypeModuleErrorMessages = makeErrorTemplates({
  ImportMetaOutsideModule: `import.meta may appear only with 'sourceType: "module"'`,
  ImportOutsideModule: `'import' and 'export' may appear only with 'sourceType: "module"'`
}, ErrorCodes.SourceTypeModuleError);

function keepReasonCodeCompat(reasonCode, syntaxPlugin) {
  {
    if (syntaxPlugin === "flow" && reasonCode === "PatternIsOptional") {
      return "OptionalBindingPattern";
    }
  }
  return reasonCode;
}

function makeErrorTemplates(messages, code, syntaxPlugin) {
  const templates = {};
  Object.keys(messages).forEach(reasonCode => {
    templates[reasonCode] = Object.freeze({
      code,
      reasonCode: keepReasonCodeCompat(reasonCode, syntaxPlugin),
      template: messages[reasonCode]
    });
  });
  return Object.freeze(templates);
}
class ParserError extends CommentsParser {
  getLocationForPosition(pos) {
    let loc;
    if (pos === this.state.start) loc = this.state.startLoc;else if (pos === this.state.lastTokStart) loc = this.state.lastTokStartLoc;else if (pos === this.state.end) loc = this.state.endLoc;else if (pos === this.state.lastTokEnd) loc = this.state.lastTokEndLoc;else loc = getLineInfo(this.input, pos);
    return loc;
  }

  raise(pos, {
    code,
    reasonCode,
    template
  }, ...params) {
    return this.raiseWithData(pos, {
      code,
      reasonCode
    }, template, ...params);
  }

  raiseOverwrite(pos, {
    code,
    template
  }, ...params) {
    const loc = this.getLocationForPosition(pos);
    const message = template.replace(/%(\d+)/g, (_, i) => params[i]) + ` (${loc.line}:${loc.column})`;

    if (this.options.errorRecovery) {
      const errors = this.state.errors;

      for (let i = errors.length - 1; i >= 0; i--) {
        const error = errors[i];

        if (error.pos === pos) {
          return Object.assign(error, {
            message
          });
        } else if (error.pos < pos) {
          break;
        }
      }
    }

    return this._raise({
      code,
      loc,
      pos
    }, message);
  }

  raiseWithData(pos, data, errorTemplate, ...params) {
    const loc = this.getLocationForPosition(pos);
    const message = errorTemplate.replace(/%(\d+)/g, (_, i) => params[i]) + ` (${loc.line}:${loc.column})`;
    return this._raise(Object.assign({
      loc,
      pos
    }, data), message);
  }

  _raise(errorContext, message) {
    const err = new SyntaxError(message);
    Object.assign(err, errorContext);

    if (this.options.errorRecovery) {
      if (!this.isLookahead) this.state.errors.push(err);
      return err;
    } else {
      throw err;
    }
  }

}

var estree = (superClass => class extends superClass {
  parseRegExpLiteral({
    pattern,
    flags
  }) {
    let regex = null;

    try {
      regex = new RegExp(pattern, flags);
    } catch (e) {}

    const node = this.estreeParseLiteral(regex);
    node.regex = {
      pattern,
      flags
    };
    return node;
  }

  parseBigIntLiteral(value) {
    let bigInt;

    try {
      bigInt = BigInt(value);
    } catch (_unused) {
      bigInt = null;
    }

    const node = this.estreeParseLiteral(bigInt);
    node.bigint = String(node.value || value);
    return node;
  }

  parseDecimalLiteral(value) {
    const decimal = null;
    const node = this.estreeParseLiteral(decimal);
    node.decimal = String(node.value || value);
    return node;
  }

  estreeParseLiteral(value) {
    return this.parseLiteral(value, "Literal");
  }

  parseStringLiteral(value) {
    return this.estreeParseLiteral(value);
  }

  parseNumericLiteral(value) {
    return this.estreeParseLiteral(value);
  }

  parseNullLiteral() {
    return this.estreeParseLiteral(null);
  }

  parseBooleanLiteral(value) {
    return this.estreeParseLiteral(value);
  }

  directiveToStmt(directive) {
    const directiveLiteral = directive.value;
    const stmt = this.startNodeAt(directive.start, directive.loc.start);
    const expression = this.startNodeAt(directiveLiteral.start, directiveLiteral.loc.start);
    expression.value = directiveLiteral.extra.expressionValue;
    expression.raw = directiveLiteral.extra.raw;
    stmt.expression = this.finishNodeAt(expression, "Literal", directiveLiteral.end, directiveLiteral.loc.end);
    stmt.directive = directiveLiteral.extra.raw.slice(1, -1);
    return this.finishNodeAt(stmt, "ExpressionStatement", directive.end, directive.loc.end);
  }

  initFunction(node, isAsync) {
    super.initFunction(node, isAsync);
    node.expression = false;
  }

  checkDeclaration(node) {
    if (node != null && this.isObjectProperty(node)) {
      this.checkDeclaration(node.value);
    } else {
      super.checkDeclaration(node);
    }
  }

  getObjectOrClassMethodParams(method) {
    return method.value.params;
  }

  isValidDirective(stmt) {
    var _stmt$expression$extr;

    return stmt.type === "ExpressionStatement" && stmt.expression.type === "Literal" && typeof stmt.expression.value === "string" && !((_stmt$expression$extr = stmt.expression.extra) != null && _stmt$expression$extr.parenthesized);
  }

  parseBlockBody(node, ...args) {
    super.parseBlockBody(node, ...args);
    const directiveStatements = node.directives.map(d => this.directiveToStmt(d));
    node.body = directiveStatements.concat(node.body);
    delete node.directives;
  }

  pushClassMethod(classBody, method, isGenerator, isAsync, isConstructor, allowsDirectSuper) {
    this.parseMethod(method, isGenerator, isAsync, isConstructor, allowsDirectSuper, "ClassMethod", true);

    if (method.typeParameters) {
      method.value.typeParameters = method.typeParameters;
      delete method.typeParameters;
    }

    classBody.body.push(method);
  }

  parsePrivateName() {
    const node = super.parsePrivateName();
    {
      if (!this.getPluginOption("estree", "classFeatures")) {
        return node;
      }
    }
    return this.convertPrivateNameToPrivateIdentifier(node);
  }

  convertPrivateNameToPrivateIdentifier(node) {
    const name = super.getPrivateNameSV(node);
    node = node;
    delete node.id;
    node.name = name;
    node.type = "PrivateIdentifier";
    return node;
  }

  isPrivateName(node) {
    {
      if (!this.getPluginOption("estree", "classFeatures")) {
        return super.isPrivateName(node);
      }
    }
    return node.type === "PrivateIdentifier";
  }

  getPrivateNameSV(node) {
    {
      if (!this.getPluginOption("estree", "classFeatures")) {
        return super.getPrivateNameSV(node);
      }
    }
    return node.name;
  }

  parseLiteral(value, type) {
    const node = super.parseLiteral(value, type);
    node.raw = node.extra.raw;
    delete node.extra;
    return node;
  }

  parseFunctionBody(node, allowExpression, isMethod = false) {
    super.parseFunctionBody(node, allowExpression, isMethod);
    node.expression = node.body.type !== "BlockStatement";
  }

  parseMethod(node, isGenerator, isAsync, isConstructor, allowDirectSuper, type, inClassScope = false) {
    let funcNode = this.startNode();
    funcNode.kind = node.kind;
    funcNode = super.parseMethod(funcNode, isGenerator, isAsync, isConstructor, allowDirectSuper, type, inClassScope);
    funcNode.type = "FunctionExpression";
    delete funcNode.kind;
    node.value = funcNode;

    if (type === "ClassPrivateMethod") {
      node.computed = false;
    }

    type = "MethodDefinition";
    return this.finishNode(node, type);
  }

  parseClassProperty(...args) {
    const propertyNode = super.parseClassProperty(...args);
    {
      if (!this.getPluginOption("estree", "classFeatures")) {
        return propertyNode;
      }
    }
    propertyNode.type = "PropertyDefinition";
    return propertyNode;
  }

  parseClassPrivateProperty(...args) {
    const propertyNode = super.parseClassPrivateProperty(...args);
    {
      if (!this.getPluginOption("estree", "classFeatures")) {
        return propertyNode;
      }
    }
    propertyNode.type = "PropertyDefinition";
    propertyNode.computed = false;
    return propertyNode;
  }

  parseObjectMethod(prop, isGenerator, isAsync, isPattern, isAccessor) {
    const node = super.parseObjectMethod(prop, isGenerator, isAsync, isPattern, isAccessor);

    if (node) {
      node.type = "Property";
      if (node.kind === "method") node.kind = "init";
      node.shorthand = false;
    }

    return node;
  }

  parseObjectProperty(prop, startPos, startLoc, isPattern, refExpressionErrors) {
    const node = super.parseObjectProperty(prop, startPos, startLoc, isPattern, refExpressionErrors);

    if (node) {
      node.kind = "init";
      node.type = "Property";
    }

    return node;
  }

  isAssignable(node, isBinding) {
    if (node != null && this.isObjectProperty(node)) {
      return this.isAssignable(node.value, isBinding);
    }

    return super.isAssignable(node, isBinding);
  }

  toAssignable(node, isLHS = false) {
    if (node != null && this.isObjectProperty(node)) {
      this.toAssignable(node.value, isLHS);
      return node;
    }

    return super.toAssignable(node, isLHS);
  }

  toAssignableObjectExpressionProp(prop, ...args) {
    if (prop.kind === "get" || prop.kind === "set") {
      this.raise(prop.key.start, ErrorMessages.PatternHasAccessor);
    } else if (prop.method) {
      this.raise(prop.key.start, ErrorMessages.PatternHasMethod);
    } else {
      super.toAssignableObjectExpressionProp(prop, ...args);
    }
  }

  finishCallExpression(node, optional) {
    super.finishCallExpression(node, optional);

    if (node.callee.type === "Import") {
      node.type = "ImportExpression";
      node.source = node.arguments[0];

      if (this.hasPlugin("importAssertions")) {
        var _node$arguments$;

        node.attributes = (_node$arguments$ = node.arguments[1]) != null ? _node$arguments$ : null;
      }

      delete node.arguments;
      delete node.callee;
    }

    return node;
  }

  toReferencedArguments(node) {
    if (node.type === "ImportExpression") {
      return;
    }

    super.toReferencedArguments(node);
  }

  parseExport(node) {
    super.parseExport(node);

    switch (node.type) {
      case "ExportAllDeclaration":
        node.exported = null;
        break;

      case "ExportNamedDeclaration":
        if (node.specifiers.length === 1 && node.specifiers[0].type === "ExportNamespaceSpecifier") {
          node.type = "ExportAllDeclaration";
          node.exported = node.specifiers[0].exported;
          delete node.specifiers;
        }

        break;
    }

    return node;
  }

  parseSubscript(base, startPos, startLoc, noCalls, state) {
    const node = super.parseSubscript(base, startPos, startLoc, noCalls, state);

    if (state.optionalChainMember) {
      if (node.type === "OptionalMemberExpression" || node.type === "OptionalCallExpression") {
        node.type = node.type.substring(8);
      }

      if (state.stop) {
        const chain = this.startNodeAtNode(node);
        chain.expression = node;
        return this.finishNode(chain, "ChainExpression");
      }
    } else if (node.type === "MemberExpression" || node.type === "CallExpression") {
      node.optional = false;
    }

    return node;
  }

  hasPropertyAsPrivateName(node) {
    if (node.type === "ChainExpression") {
      node = node.expression;
    }

    return super.hasPropertyAsPrivateName(node);
  }

  isOptionalChain(node) {
    return node.type === "ChainExpression";
  }

  isObjectProperty(node) {
    return node.type === "Property" && node.kind === "init" && !node.method;
  }

  isObjectMethod(node) {
    return node.method || node.kind === "get" || node.kind === "set";
  }

});

class TokContext {
  constructor(token, preserveSpace) {
    this.token = void 0;
    this.preserveSpace = void 0;
    this.token = token;
    this.preserveSpace = !!preserveSpace;
  }

}
const types = {
  brace: new TokContext("{"),
  template: new TokContext("`", true)
};

const beforeExpr = true;
const startsExpr = true;
const isLoop = true;
const isAssign = true;
const prefix = true;
const postfix = true;
class ExportedTokenType {
  constructor(label, conf = {}) {
    this.label = void 0;
    this.keyword = void 0;
    this.beforeExpr = void 0;
    this.startsExpr = void 0;
    this.rightAssociative = void 0;
    this.isLoop = void 0;
    this.isAssign = void 0;
    this.prefix = void 0;
    this.postfix = void 0;
    this.binop = void 0;
    this.label = label;
    this.keyword = conf.keyword;
    this.beforeExpr = !!conf.beforeExpr;
    this.startsExpr = !!conf.startsExpr;
    this.rightAssociative = !!conf.rightAssociative;
    this.isLoop = !!conf.isLoop;
    this.isAssign = !!conf.isAssign;
    this.prefix = !!conf.prefix;
    this.postfix = !!conf.postfix;
    this.binop = conf.binop != null ? conf.binop : null;
    {
      this.updateContext = null;
    }
  }

}
const keywords$1 = new Map();

function createKeyword(name, options = {}) {
  options.keyword = name;
  const token = createToken(name, options);
  keywords$1.set(name, token);
  return token;
}

function createBinop(name, binop) {
  return createToken(name, {
    beforeExpr,
    binop
  });
}

let tokenTypeCounter = -1;
const tokenTypes = [];
const tokenLabels = [];
const tokenBinops = [];
const tokenBeforeExprs = [];
const tokenStartsExprs = [];
const tokenPrefixes = [];

function createToken(name, options = {}) {
  var _options$binop, _options$beforeExpr, _options$startsExpr, _options$prefix;

  ++tokenTypeCounter;
  tokenLabels.push(name);
  tokenBinops.push((_options$binop = options.binop) != null ? _options$binop : -1);
  tokenBeforeExprs.push((_options$beforeExpr = options.beforeExpr) != null ? _options$beforeExpr : false);
  tokenStartsExprs.push((_options$startsExpr = options.startsExpr) != null ? _options$startsExpr : false);
  tokenPrefixes.push((_options$prefix = options.prefix) != null ? _options$prefix : false);
  tokenTypes.push(new ExportedTokenType(name, options));
  return tokenTypeCounter;
}

function createKeywordLike(name, options = {}) {
  var _options$binop2, _options$beforeExpr2, _options$startsExpr2, _options$prefix2;

  ++tokenTypeCounter;
  keywords$1.set(name, tokenTypeCounter);
  tokenLabels.push(name);
  tokenBinops.push((_options$binop2 = options.binop) != null ? _options$binop2 : -1);
  tokenBeforeExprs.push((_options$beforeExpr2 = options.beforeExpr) != null ? _options$beforeExpr2 : false);
  tokenStartsExprs.push((_options$startsExpr2 = options.startsExpr) != null ? _options$startsExpr2 : false);
  tokenPrefixes.push((_options$prefix2 = options.prefix) != null ? _options$prefix2 : false);
  tokenTypes.push(new ExportedTokenType("name", options));
  return tokenTypeCounter;
}

const tt = {
  bracketL: createToken("[", {
    beforeExpr,
    startsExpr
  }),
  bracketHashL: createToken("#[", {
    beforeExpr,
    startsExpr
  }),
  bracketBarL: createToken("[|", {
    beforeExpr,
    startsExpr
  }),
  bracketR: createToken("]"),
  bracketBarR: createToken("|]"),
  braceL: createToken("{", {
    beforeExpr,
    startsExpr
  }),
  braceBarL: createToken("{|", {
    beforeExpr,
    startsExpr
  }),
  braceHashL: createToken("#{", {
    beforeExpr,
    startsExpr
  }),
  braceR: createToken("}", {
    beforeExpr
  }),
  braceBarR: createToken("|}"),
  parenL: createToken("(", {
    beforeExpr,
    startsExpr
  }),
  parenR: createToken(")"),
  comma: createToken(",", {
    beforeExpr
  }),
  semi: createToken(";", {
    beforeExpr
  }),
  colon: createToken(":", {
    beforeExpr
  }),
  doubleColon: createToken("::", {
    beforeExpr
  }),
  dot: createToken("."),
  question: createToken("?", {
    beforeExpr
  }),
  questionDot: createToken("?."),
  arrow: createToken("=>", {
    beforeExpr
  }),
  template: createToken("template"),
  ellipsis: createToken("...", {
    beforeExpr
  }),
  backQuote: createToken("`", {
    startsExpr
  }),
  dollarBraceL: createToken("${", {
    beforeExpr,
    startsExpr
  }),
  at: createToken("@"),
  hash: createToken("#", {
    startsExpr
  }),
  interpreterDirective: createToken("#!..."),
  eq: createToken("=", {
    beforeExpr,
    isAssign
  }),
  assign: createToken("_=", {
    beforeExpr,
    isAssign
  }),
  slashAssign: createToken("_=", {
    beforeExpr,
    isAssign
  }),
  xorAssign: createToken("_=", {
    beforeExpr,
    isAssign
  }),
  moduloAssign: createToken("_=", {
    beforeExpr,
    isAssign
  }),
  incDec: createToken("++/--", {
    prefix,
    postfix,
    startsExpr
  }),
  bang: createToken("!", {
    beforeExpr,
    prefix,
    startsExpr
  }),
  tilde: createToken("~", {
    beforeExpr,
    prefix,
    startsExpr
  }),
  pipeline: createBinop("|>", 0),
  nullishCoalescing: createBinop("??", 1),
  logicalOR: createBinop("||", 1),
  logicalAND: createBinop("&&", 2),
  bitwiseOR: createBinop("|", 3),
  bitwiseXOR: createBinop("^", 4),
  bitwiseAND: createBinop("&", 5),
  equality: createBinop("==/!=/===/!==", 6),
  lt: createBinop("</>/<=/>=", 7),
  gt: createBinop("</>/<=/>=", 7),
  relational: createBinop("</>/<=/>=", 7),
  bitShift: createBinop("<</>>/>>>", 8),
  plusMin: createToken("+/-", {
    beforeExpr,
    binop: 9,
    prefix,
    startsExpr
  }),
  modulo: createToken("%", {
    binop: 10,
    startsExpr
  }),
  star: createToken("*", {
    binop: 10
  }),
  slash: createBinop("/", 10),
  exponent: createToken("**", {
    beforeExpr,
    binop: 11,
    rightAssociative: true
  }),
  _in: createKeyword("in", {
    beforeExpr,
    binop: 7
  }),
  _instanceof: createKeyword("instanceof", {
    beforeExpr,
    binop: 7
  }),
  _break: createKeyword("break"),
  _case: createKeyword("case", {
    beforeExpr
  }),
  _catch: createKeyword("catch"),
  _continue: createKeyword("continue"),
  _debugger: createKeyword("debugger"),
  _default: createKeyword("default", {
    beforeExpr
  }),
  _else: createKeyword("else", {
    beforeExpr
  }),
  _finally: createKeyword("finally"),
  _function: createKeyword("function", {
    startsExpr
  }),
  _if: createKeyword("if"),
  _return: createKeyword("return", {
    beforeExpr
  }),
  _switch: createKeyword("switch"),
  _throw: createKeyword("throw", {
    beforeExpr,
    prefix,
    startsExpr
  }),
  _try: createKeyword("try"),
  _var: createKeyword("var"),
  _const: createKeyword("const"),
  _with: createKeyword("with"),
  _new: createKeyword("new", {
    beforeExpr,
    startsExpr
  }),
  _this: createKeyword("this", {
    startsExpr
  }),
  _super: createKeyword("super", {
    startsExpr
  }),
  _class: createKeyword("class", {
    startsExpr
  }),
  _extends: createKeyword("extends", {
    beforeExpr
  }),
  _export: createKeyword("export"),
  _import: createKeyword("import", {
    startsExpr
  }),
  _null: createKeyword("null", {
    startsExpr
  }),
  _true: createKeyword("true", {
    startsExpr
  }),
  _false: createKeyword("false", {
    startsExpr
  }),
  _typeof: createKeyword("typeof", {
    beforeExpr,
    prefix,
    startsExpr
  }),
  _void: createKeyword("void", {
    beforeExpr,
    prefix,
    startsExpr
  }),
  _delete: createKeyword("delete", {
    beforeExpr,
    prefix,
    startsExpr
  }),
  _do: createKeyword("do", {
    isLoop,
    beforeExpr
  }),
  _for: createKeyword("for", {
    isLoop
  }),
  _while: createKeyword("while", {
    isLoop
  }),
  _as: createKeywordLike("as", {
    startsExpr
  }),
  _assert: createKeywordLike("assert", {
    startsExpr
  }),
  _async: createKeywordLike("async", {
    startsExpr
  }),
  _await: createKeywordLike("await", {
    startsExpr
  }),
  _from: createKeywordLike("from", {
    startsExpr
  }),
  _get: createKeywordLike("get", {
    startsExpr
  }),
  _let: createKeywordLike("let", {
    startsExpr
  }),
  _meta: createKeywordLike("meta", {
    startsExpr
  }),
  _of: createKeywordLike("of", {
    startsExpr
  }),
  _sent: createKeywordLike("sent", {
    startsExpr
  }),
  _set: createKeywordLike("set", {
    startsExpr
  }),
  _static: createKeywordLike("static", {
    startsExpr
  }),
  _yield: createKeywordLike("yield", {
    startsExpr
  }),
  _asserts: createKeywordLike("asserts", {
    startsExpr
  }),
  _checks: createKeywordLike("checks", {
    startsExpr
  }),
  _exports: createKeywordLike("exports", {
    startsExpr
  }),
  _global: createKeywordLike("global", {
    startsExpr
  }),
  _implements: createKeywordLike("implements", {
    startsExpr
  }),
  _intrinsic: createKeywordLike("intrinsic", {
    startsExpr
  }),
  _infer: createKeywordLike("infer", {
    startsExpr
  }),
  _is: createKeywordLike("is", {
    startsExpr
  }),
  _mixins: createKeywordLike("mixins", {
    startsExpr
  }),
  _proto: createKeywordLike("proto", {
    startsExpr
  }),
  _require: createKeywordLike("require", {
    startsExpr
  }),
  _keyof: createKeywordLike("keyof", {
    startsExpr
  }),
  _readonly: createKeywordLike("readonly", {
    startsExpr
  }),
  _unique: createKeywordLike("unique", {
    startsExpr
  }),
  _abstract: createKeywordLike("abstract", {
    startsExpr
  }),
  _declare: createKeywordLike("declare", {
    startsExpr
  }),
  _enum: createKeywordLike("enum", {
    startsExpr
  }),
  _module: createKeywordLike("module", {
    startsExpr
  }),
  _namespace: createKeywordLike("namespace", {
    startsExpr
  }),
  _interface: createKeywordLike("interface", {
    startsExpr
  }),
  _type: createKeywordLike("type", {
    startsExpr
  }),
  _opaque: createKeywordLike("opaque", {
    startsExpr
  }),
  name: createToken("name", {
    startsExpr
  }),
  string: createToken("string", {
    startsExpr
  }),
  num: createToken("num", {
    startsExpr
  }),
  bigint: createToken("bigint", {
    startsExpr
  }),
  decimal: createToken("decimal", {
    startsExpr
  }),
  regexp: createToken("regexp", {
    startsExpr
  }),
  privateName: createToken("#name", {
    startsExpr
  }),
  eof: createToken("eof"),
  jsxName: createToken("jsxName"),
  jsxText: createToken("jsxText", {
    beforeExpr: true
  }),
  jsxTagStart: createToken("jsxTagStart", {
    startsExpr: true
  }),
  jsxTagEnd: createToken("jsxTagEnd"),
  placeholder: createToken("%%", {
    startsExpr: true
  })
};
function tokenIsIdentifier(token) {
  return token >= 87 && token <= 122;
}
function tokenKeywordOrIdentifierIsKeyword(token) {
  return token <= 86;
}
function tokenIsKeywordOrIdentifier(token) {
  return token >= 52 && token <= 122;
}
function tokenIsLiteralPropertyName(token) {
  return token >= 52 && token <= 126;
}
function tokenComesBeforeExpression(token) {
  return tokenBeforeExprs[token];
}
function tokenCanStartExpression(token) {
  return tokenStartsExprs[token];
}
function tokenIsAssignment(token) {
  return token >= 27 && token <= 31;
}
function tokenIsFlowInterfaceOrTypeOrOpaque(token) {
  return token >= 119 && token <= 121;
}
function tokenIsLoop(token) {
  return token >= 84 && token <= 86;
}
function tokenIsKeyword(token) {
  return token >= 52 && token <= 86;
}
function tokenIsOperator(token) {
  return token >= 35 && token <= 53;
}
function tokenIsPostfix(token) {
  return token === 32;
}
function tokenIsPrefix(token) {
  return tokenPrefixes[token];
}
function tokenIsTSTypeOperator(token) {
  return token >= 111 && token <= 113;
}
function tokenIsTSDeclarationStart(token) {
  return token >= 114 && token <= 120;
}
function tokenLabelName(token) {
  return tokenLabels[token];
}
function tokenOperatorPrecedence(token) {
  return tokenBinops[token];
}
function tokenIsRightAssociative(token) {
  return token === 51;
}
function getExportedToken(token) {
  return tokenTypes[token];
}
function isTokenType(obj) {
  return typeof obj === "number";
}
{
  tokenTypes[8].updateContext = context => {
    context.pop();
  };

  tokenTypes[5].updateContext = tokenTypes[7].updateContext = tokenTypes[23].updateContext = context => {
    context.push(types.brace);
  };

  tokenTypes[22].updateContext = context => {
    if (context[context.length - 1] === types.template) {
      context.pop();
    } else {
      context.push(types.template);
    }
  };

  tokenTypes[132].updateContext = context => {
    context.push(types.j_expr, types.j_oTag);
  };
}

let nonASCIIidentifierStartChars = "\xaa\xb5\xba\xc0-\xd6\xd8-\xf6\xf8-\u02c1\u02c6-\u02d1\u02e0-\u02e4\u02ec\u02ee\u0370-\u0374\u0376\u0377\u037a-\u037d\u037f\u0386\u0388-\u038a\u038c\u038e-\u03a1\u03a3-\u03f5\u03f7-\u0481\u048a-\u052f\u0531-\u0556\u0559\u0560-\u0588\u05d0-\u05ea\u05ef-\u05f2\u0620-\u064a\u066e\u066f\u0671-\u06d3\u06d5\u06e5\u06e6\u06ee\u06ef\u06fa-\u06fc\u06ff\u0710\u0712-\u072f\u074d-\u07a5\u07b1\u07ca-\u07ea\u07f4\u07f5\u07fa\u0800-\u0815\u081a\u0824\u0828\u0840-\u0858\u0860-\u086a\u0870-\u0887\u0889-\u088e\u08a0-\u08c9\u0904-\u0939\u093d\u0950\u0958-\u0961\u0971-\u0980\u0985-\u098c\u098f\u0990\u0993-\u09a8\u09aa-\u09b0\u09b2\u09b6-\u09b9\u09bd\u09ce\u09dc\u09dd\u09df-\u09e1\u09f0\u09f1\u09fc\u0a05-\u0a0a\u0a0f\u0a10\u0a13-\u0a28\u0a2a-\u0a30\u0a32\u0a33\u0a35\u0a36\u0a38\u0a39\u0a59-\u0a5c\u0a5e\u0a72-\u0a74\u0a85-\u0a8d\u0a8f-\u0a91\u0a93-\u0aa8\u0aaa-\u0ab0\u0ab2\u0ab3\u0ab5-\u0ab9\u0abd\u0ad0\u0ae0\u0ae1\u0af9\u0b05-\u0b0c\u0b0f\u0b10\u0b13-\u0b28\u0b2a-\u0b30\u0b32\u0b33\u0b35-\u0b39\u0b3d\u0b5c\u0b5d\u0b5f-\u0b61\u0b71\u0b83\u0b85-\u0b8a\u0b8e-\u0b90\u0b92-\u0b95\u0b99\u0b9a\u0b9c\u0b9e\u0b9f\u0ba3\u0ba4\u0ba8-\u0baa\u0bae-\u0bb9\u0bd0\u0c05-\u0c0c\u0c0e-\u0c10\u0c12-\u0c28\u0c2a-\u0c39\u0c3d\u0c58-\u0c5a\u0c5d\u0c60\u0c61\u0c80\u0c85-\u0c8c\u0c8e-\u0c90\u0c92-\u0ca8\u0caa-\u0cb3\u0cb5-\u0cb9\u0cbd\u0cdd\u0cde\u0ce0\u0ce1\u0cf1\u0cf2\u0d04-\u0d0c\u0d0e-\u0d10\u0d12-\u0d3a\u0d3d\u0d4e\u0d54-\u0d56\u0d5f-\u0d61\u0d7a-\u0d7f\u0d85-\u0d96\u0d9a-\u0db1\u0db3-\u0dbb\u0dbd\u0dc0-\u0dc6\u0e01-\u0e30\u0e32\u0e33\u0e40-\u0e46\u0e81\u0e82\u0e84\u0e86-\u0e8a\u0e8c-\u0ea3\u0ea5\u0ea7-\u0eb0\u0eb2\u0eb3\u0ebd\u0ec0-\u0ec4\u0ec6\u0edc-\u0edf\u0f00\u0f40-\u0f47\u0f49-\u0f6c\u0f88-\u0f8c\u1000-\u102a\u103f\u1050-\u1055\u105a-\u105d\u1061\u1065\u1066\u106e-\u1070\u1075-\u1081\u108e\u10a0-\u10c5\u10c7\u10cd\u10d0-\u10fa\u10fc-\u1248\u124a-\u124d\u1250-\u1256\u1258\u125a-\u125d\u1260-\u1288\u128a-\u128d\u1290-\u12b0\u12b2-\u12b5\u12b8-\u12be\u12c0\u12c2-\u12c5\u12c8-\u12d6\u12d8-\u1310\u1312-\u1315\u1318-\u135a\u1380-\u138f\u13a0-\u13f5\u13f8-\u13fd\u1401-\u166c\u166f-\u167f\u1681-\u169a\u16a0-\u16ea\u16ee-\u16f8\u1700-\u1711\u171f-\u1731\u1740-\u1751\u1760-\u176c\u176e-\u1770\u1780-\u17b3\u17d7\u17dc\u1820-\u1878\u1880-\u18a8\u18aa\u18b0-\u18f5\u1900-\u191e\u1950-\u196d\u1970-\u1974\u1980-\u19ab\u19b0-\u19c9\u1a00-\u1a16\u1a20-\u1a54\u1aa7\u1b05-\u1b33\u1b45-\u1b4c\u1b83-\u1ba0\u1bae\u1baf\u1bba-\u1be5\u1c00-\u1c23\u1c4d-\u1c4f\u1c5a-\u1c7d\u1c80-\u1c88\u1c90-\u1cba\u1cbd-\u1cbf\u1ce9-\u1cec\u1cee-\u1cf3\u1cf5\u1cf6\u1cfa\u1d00-\u1dbf\u1e00-\u1f15\u1f18-\u1f1d\u1f20-\u1f45\u1f48-\u1f4d\u1f50-\u1f57\u1f59\u1f5b\u1f5d\u1f5f-\u1f7d\u1f80-\u1fb4\u1fb6-\u1fbc\u1fbe\u1fc2-\u1fc4\u1fc6-\u1fcc\u1fd0-\u1fd3\u1fd6-\u1fdb\u1fe0-\u1fec\u1ff2-\u1ff4\u1ff6-\u1ffc\u2071\u207f\u2090-\u209c\u2102\u2107\u210a-\u2113\u2115\u2118-\u211d\u2124\u2126\u2128\u212a-\u2139\u213c-\u213f\u2145-\u2149\u214e\u2160-\u2188\u2c00-\u2ce4\u2ceb-\u2cee\u2cf2\u2cf3\u2d00-\u2d25\u2d27\u2d2d\u2d30-\u2d67\u2d6f\u2d80-\u2d96\u2da0-\u2da6\u2da8-\u2dae\u2db0-\u2db6\u2db8-\u2dbe\u2dc0-\u2dc6\u2dc8-\u2dce\u2dd0-\u2dd6\u2dd8-\u2dde\u3005-\u3007\u3021-\u3029\u3031-\u3035\u3038-\u303c\u3041-\u3096\u309b-\u309f\u30a1-\u30fa\u30fc-\u30ff\u3105-\u312f\u3131-\u318e\u31a0-\u31bf\u31f0-\u31ff\u3400-\u4dbf\u4e00-\ua48c\ua4d0-\ua4fd\ua500-\ua60c\ua610-\ua61f\ua62a\ua62b\ua640-\ua66e\ua67f-\ua69d\ua6a0-\ua6ef\ua717-\ua71f\ua722-\ua788\ua78b-\ua7ca\ua7d0\ua7d1\ua7d3\ua7d5-\ua7d9\ua7f2-\ua801\ua803-\ua805\ua807-\ua80a\ua80c-\ua822\ua840-\ua873\ua882-\ua8b3\ua8f2-\ua8f7\ua8fb\ua8fd\ua8fe\ua90a-\ua925\ua930-\ua946\ua960-\ua97c\ua984-\ua9b2\ua9cf\ua9e0-\ua9e4\ua9e6-\ua9ef\ua9fa-\ua9fe\uaa00-\uaa28\uaa40-\uaa42\uaa44-\uaa4b\uaa60-\uaa76\uaa7a\uaa7e-\uaaaf\uaab1\uaab5\uaab6\uaab9-\uaabd\uaac0\uaac2\uaadb-\uaadd\uaae0-\uaaea\uaaf2-\uaaf4\uab01-\uab06\uab09-\uab0e\uab11-\uab16\uab20-\uab26\uab28-\uab2e\uab30-\uab5a\uab5c-\uab69\uab70-\uabe2\uac00-\ud7a3\ud7b0-\ud7c6\ud7cb-\ud7fb\uf900-\ufa6d\ufa70-\ufad9\ufb00-\ufb06\ufb13-\ufb17\ufb1d\ufb1f-\ufb28\ufb2a-\ufb36\ufb38-\ufb3c\ufb3e\ufb40\ufb41\ufb43\ufb44\ufb46-\ufbb1\ufbd3-\ufd3d\ufd50-\ufd8f\ufd92-\ufdc7\ufdf0-\ufdfb\ufe70-\ufe74\ufe76-\ufefc\uff21-\uff3a\uff41-\uff5a\uff66-\uffbe\uffc2-\uffc7\uffca-\uffcf\uffd2-\uffd7\uffda-\uffdc";
let nonASCIIidentifierChars = "\u200c\u200d\xb7\u0300-\u036f\u0387\u0483-\u0487\u0591-\u05bd\u05bf\u05c1\u05c2\u05c4\u05c5\u05c7\u0610-\u061a\u064b-\u0669\u0670\u06d6-\u06dc\u06df-\u06e4\u06e7\u06e8\u06ea-\u06ed\u06f0-\u06f9\u0711\u0730-\u074a\u07a6-\u07b0\u07c0-\u07c9\u07eb-\u07f3\u07fd\u0816-\u0819\u081b-\u0823\u0825-\u0827\u0829-\u082d\u0859-\u085b\u0898-\u089f\u08ca-\u08e1\u08e3-\u0903\u093a-\u093c\u093e-\u094f\u0951-\u0957\u0962\u0963\u0966-\u096f\u0981-\u0983\u09bc\u09be-\u09c4\u09c7\u09c8\u09cb-\u09cd\u09d7\u09e2\u09e3\u09e6-\u09ef\u09fe\u0a01-\u0a03\u0a3c\u0a3e-\u0a42\u0a47\u0a48\u0a4b-\u0a4d\u0a51\u0a66-\u0a71\u0a75\u0a81-\u0a83\u0abc\u0abe-\u0ac5\u0ac7-\u0ac9\u0acb-\u0acd\u0ae2\u0ae3\u0ae6-\u0aef\u0afa-\u0aff\u0b01-\u0b03\u0b3c\u0b3e-\u0b44\u0b47\u0b48\u0b4b-\u0b4d\u0b55-\u0b57\u0b62\u0b63\u0b66-\u0b6f\u0b82\u0bbe-\u0bc2\u0bc6-\u0bc8\u0bca-\u0bcd\u0bd7\u0be6-\u0bef\u0c00-\u0c04\u0c3c\u0c3e-\u0c44\u0c46-\u0c48\u0c4a-\u0c4d\u0c55\u0c56\u0c62\u0c63\u0c66-\u0c6f\u0c81-\u0c83\u0cbc\u0cbe-\u0cc4\u0cc6-\u0cc8\u0cca-\u0ccd\u0cd5\u0cd6\u0ce2\u0ce3\u0ce6-\u0cef\u0d00-\u0d03\u0d3b\u0d3c\u0d3e-\u0d44\u0d46-\u0d48\u0d4a-\u0d4d\u0d57\u0d62\u0d63\u0d66-\u0d6f\u0d81-\u0d83\u0dca\u0dcf-\u0dd4\u0dd6\u0dd8-\u0ddf\u0de6-\u0def\u0df2\u0df3\u0e31\u0e34-\u0e3a\u0e47-\u0e4e\u0e50-\u0e59\u0eb1\u0eb4-\u0ebc\u0ec8-\u0ecd\u0ed0-\u0ed9\u0f18\u0f19\u0f20-\u0f29\u0f35\u0f37\u0f39\u0f3e\u0f3f\u0f71-\u0f84\u0f86\u0f87\u0f8d-\u0f97\u0f99-\u0fbc\u0fc6\u102b-\u103e\u1040-\u1049\u1056-\u1059\u105e-\u1060\u1062-\u1064\u1067-\u106d\u1071-\u1074\u1082-\u108d\u108f-\u109d\u135d-\u135f\u1369-\u1371\u1712-\u1715\u1732-\u1734\u1752\u1753\u1772\u1773\u17b4-\u17d3\u17dd\u17e0-\u17e9\u180b-\u180d\u180f-\u1819\u18a9\u1920-\u192b\u1930-\u193b\u1946-\u194f\u19d0-\u19da\u1a17-\u1a1b\u1a55-\u1a5e\u1a60-\u1a7c\u1a7f-\u1a89\u1a90-\u1a99\u1ab0-\u1abd\u1abf-\u1ace\u1b00-\u1b04\u1b34-\u1b44\u1b50-\u1b59\u1b6b-\u1b73\u1b80-\u1b82\u1ba1-\u1bad\u1bb0-\u1bb9\u1be6-\u1bf3\u1c24-\u1c37\u1c40-\u1c49\u1c50-\u1c59\u1cd0-\u1cd2\u1cd4-\u1ce8\u1ced\u1cf4\u1cf7-\u1cf9\u1dc0-\u1dff\u203f\u2040\u2054\u20d0-\u20dc\u20e1\u20e5-\u20f0\u2cef-\u2cf1\u2d7f\u2de0-\u2dff\u302a-\u302f\u3099\u309a\ua620-\ua629\ua66f\ua674-\ua67d\ua69e\ua69f\ua6f0\ua6f1\ua802\ua806\ua80b\ua823-\ua827\ua82c\ua880\ua881\ua8b4-\ua8c5\ua8d0-\ua8d9\ua8e0-\ua8f1\ua8ff-\ua909\ua926-\ua92d\ua947-\ua953\ua980-\ua983\ua9b3-\ua9c0\ua9d0-\ua9d9\ua9e5\ua9f0-\ua9f9\uaa29-\uaa36\uaa43\uaa4c\uaa4d\uaa50-\uaa59\uaa7b-\uaa7d\uaab0\uaab2-\uaab4\uaab7\uaab8\uaabe\uaabf\uaac1\uaaeb-\uaaef\uaaf5\uaaf6\uabe3-\uabea\uabec\uabed\uabf0-\uabf9\ufb1e\ufe00-\ufe0f\ufe20-\ufe2f\ufe33\ufe34\ufe4d-\ufe4f\uff10-\uff19\uff3f";
const nonASCIIidentifierStart = new RegExp("[" + nonASCIIidentifierStartChars + "]");
const nonASCIIidentifier = new RegExp("[" + nonASCIIidentifierStartChars + nonASCIIidentifierChars + "]");
nonASCIIidentifierStartChars = nonASCIIidentifierChars = null;
const astralIdentifierStartCodes = [0, 11, 2, 25, 2, 18, 2, 1, 2, 14, 3, 13, 35, 122, 70, 52, 268, 28, 4, 48, 48, 31, 14, 29, 6, 37, 11, 29, 3, 35, 5, 7, 2, 4, 43, 157, 19, 35, 5, 35, 5, 39, 9, 51, 13, 10, 2, 14, 2, 6, 2, 1, 2, 10, 2, 14, 2, 6, 2, 1, 68, 310, 10, 21, 11, 7, 25, 5, 2, 41, 2, 8, 70, 5, 3, 0, 2, 43, 2, 1, 4, 0, 3, 22, 11, 22, 10, 30, 66, 18, 2, 1, 11, 21, 11, 25, 71, 55, 7, 1, 65, 0, 16, 3, 2, 2, 2, 28, 43, 28, 4, 28, 36, 7, 2, 27, 28, 53, 11, 21, 11, 18, 14, 17, 111, 72, 56, 50, 14, 50, 14, 35, 349, 41, 7, 1, 79, 28, 11, 0, 9, 21, 43, 17, 47, 20, 28, 22, 13, 52, 58, 1, 3, 0, 14, 44, 33, 24, 27, 35, 30, 0, 3, 0, 9, 34, 4, 0, 13, 47, 15, 3, 22, 0, 2, 0, 36, 17, 2, 24, 85, 6, 2, 0, 2, 3, 2, 14, 2, 9, 8, 46, 39, 7, 3, 1, 3, 21, 2, 6, 2, 1, 2, 4, 4, 0, 19, 0, 13, 4, 159, 52, 19, 3, 21, 2, 31, 47, 21, 1, 2, 0, 185, 46, 42, 3, 37, 47, 21, 0, 60, 42, 14, 0, 72, 26, 38, 6, 186, 43, 117, 63, 32, 7, 3, 0, 3, 7, 2, 1, 2, 23, 16, 0, 2, 0, 95, 7, 3, 38, 17, 0, 2, 0, 29, 0, 11, 39, 8, 0, 22, 0, 12, 45, 20, 0, 19, 72, 264, 8, 2, 36, 18, 0, 50, 29, 113, 6, 2, 1, 2, 37, 22, 0, 26, 5, 2, 1, 2, 31, 15, 0, 328, 18, 190, 0, 80, 921, 103, 110, 18, 195, 2637, 96, 16, 1070, 4050, 582, 8634, 568, 8, 30, 18, 78, 18, 29, 19, 47, 17, 3, 32, 20, 6, 18, 689, 63, 129, 74, 6, 0, 67, 12, 65, 1, 2, 0, 29, 6135, 9, 1237, 43, 8, 8936, 3, 2, 6, 2, 1, 2, 290, 46, 2, 18, 3, 9, 395, 2309, 106, 6, 12, 4, 8, 8, 9, 5991, 84, 2, 70, 2, 1, 3, 0, 3, 1, 3, 3, 2, 11, 2, 0, 2, 6, 2, 64, 2, 3, 3, 7, 2, 6, 2, 27, 2, 3, 2, 4, 2, 0, 4, 6, 2, 339, 3, 24, 2, 24, 2, 30, 2, 24, 2, 30, 2, 24, 2, 30, 2, 24, 2, 30, 2, 24, 2, 7, 1845, 30, 482, 44, 11, 6, 17, 0, 322, 29, 19, 43, 1269, 6, 2, 3, 2, 1, 2, 14, 2, 196, 60, 67, 8, 0, 1205, 3, 2, 26, 2, 1, 2, 0, 3, 0, 2, 9, 2, 3, 2, 0, 2, 0, 7, 0, 5, 0, 2, 0, 2, 0, 2, 2, 2, 1, 2, 0, 3, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 1, 2, 0, 3, 3, 2, 6, 2, 3, 2, 3, 2, 0, 2, 9, 2, 16, 6, 2, 2, 4, 2, 16, 4421, 42719, 33, 4152, 8, 221, 3, 5761, 15, 7472, 3104, 541, 1507, 4938];
const astralIdentifierCodes = [509, 0, 227, 0, 150, 4, 294, 9, 1368, 2, 2, 1, 6, 3, 41, 2, 5, 0, 166, 1, 574, 3, 9, 9, 370, 1, 154, 10, 50, 3, 123, 2, 54, 14, 32, 10, 3, 1, 11, 3, 46, 10, 8, 0, 46, 9, 7, 2, 37, 13, 2, 9, 6, 1, 45, 0, 13, 2, 49, 13, 9, 3, 2, 11, 83, 11, 7, 0, 161, 11, 6, 9, 7, 3, 56, 1, 2, 6, 3, 1, 3, 2, 10, 0, 11, 1, 3, 6, 4, 4, 193, 17, 10, 9, 5, 0, 82, 19, 13, 9, 214, 6, 3, 8, 28, 1, 83, 16, 16, 9, 82, 12, 9, 9, 84, 14, 5, 9, 243, 14, 166, 9, 71, 5, 2, 1, 3, 3, 2, 0, 2, 1, 13, 9, 120, 6, 3, 6, 4, 0, 29, 9, 41, 6, 2, 3, 9, 0, 10, 10, 47, 15, 406, 7, 2, 7, 17, 9, 57, 21, 2, 13, 123, 5, 4, 0, 2, 1, 2, 6, 2, 0, 9, 9, 49, 4, 2, 1, 2, 4, 9, 9, 330, 3, 19306, 9, 87, 9, 39, 4, 60, 6, 26, 9, 1014, 0, 2, 54, 8, 3, 82, 0, 12, 1, 19628, 1, 4706, 45, 3, 22, 543, 4, 4, 5, 9, 7, 3, 6, 31, 3, 149, 2, 1418, 49, 513, 54, 5, 49, 9, 0, 15, 0, 23, 4, 2, 14, 1361, 6, 2, 16, 3, 6, 2, 1, 2, 4, 262, 6, 10, 9, 357, 0, 62, 13, 1495, 6, 110, 6, 6, 9, 4759, 9, 787719, 239];

function isInAstralSet(code, set) {
  let pos = 0x10000;

  for (let i = 0, length = set.length; i < length; i += 2) {
    pos += set[i];
    if (pos > code) return false;
    pos += set[i + 1];
    if (pos >= code) return true;
  }

  return false;
}

function isIdentifierStart(code) {
  if (code < 65) return code === 36;
  if (code <= 90) return true;
  if (code < 97) return code === 95;
  if (code <= 122) return true;

  if (code <= 0xffff) {
    return code >= 0xaa && nonASCIIidentifierStart.test(String.fromCharCode(code));
  }

  return isInAstralSet(code, astralIdentifierStartCodes);
}
function isIdentifierChar(code) {
  if (code < 48) return code === 36;
  if (code < 58) return true;
  if (code < 65) return false;
  if (code <= 90) return true;
  if (code < 97) return code === 95;
  if (code <= 122) return true;

  if (code <= 0xffff) {
    return code >= 0xaa && nonASCIIidentifier.test(String.fromCharCode(code));
  }

  return isInAstralSet(code, astralIdentifierStartCodes) || isInAstralSet(code, astralIdentifierCodes);
}

const reservedWords = {
  keyword: ["break", "case", "catch", "continue", "debugger", "default", "do", "else", "finally", "for", "function", "if", "return", "switch", "throw", "try", "var", "const", "while", "with", "new", "this", "super", "class", "extends", "export", "import", "null", "true", "false", "in", "instanceof", "typeof", "void", "delete"],
  strict: ["implements", "interface", "let", "package", "private", "protected", "public", "static", "yield"],
  strictBind: ["eval", "arguments"]
};
const keywords = new Set(reservedWords.keyword);
const reservedWordsStrictSet = new Set(reservedWords.strict);
const reservedWordsStrictBindSet = new Set(reservedWords.strictBind);
function isReservedWord(word, inModule) {
  return inModule && word === "await" || word === "enum";
}
function isStrictReservedWord(word, inModule) {
  return isReservedWord(word, inModule) || reservedWordsStrictSet.has(word);
}
function isStrictBindOnlyReservedWord(word) {
  return reservedWordsStrictBindSet.has(word);
}
function isStrictBindReservedWord(word, inModule) {
  return isStrictReservedWord(word, inModule) || isStrictBindOnlyReservedWord(word);
}
function isKeyword(word) {
  return keywords.has(word);
}

function isIteratorStart(current, next) {
  return current === 64 && next === 64;
}
const reservedWordLikeSet = new Set(["break", "case", "catch", "continue", "debugger", "default", "do", "else", "finally", "for", "function", "if", "return", "switch", "throw", "try", "var", "const", "while", "with", "new", "this", "super", "class", "extends", "export", "import", "null", "true", "false", "in", "instanceof", "typeof", "void", "delete", "implements", "interface", "let", "package", "private", "protected", "public", "static", "yield", "eval", "arguments", "enum", "await"]);
function canBeReservedWord(word) {
  return reservedWordLikeSet.has(word);
}

const SCOPE_OTHER = 0b000000000,
      SCOPE_PROGRAM = 0b000000001,
      SCOPE_FUNCTION = 0b000000010,
      SCOPE_ARROW = 0b000000100,
      SCOPE_SIMPLE_CATCH = 0b000001000,
      SCOPE_SUPER = 0b000010000,
      SCOPE_DIRECT_SUPER = 0b000100000,
      SCOPE_CLASS = 0b001000000,
      SCOPE_STATIC_BLOCK = 0b010000000,
      SCOPE_TS_MODULE = 0b100000000,
      SCOPE_VAR = SCOPE_PROGRAM | SCOPE_FUNCTION | SCOPE_TS_MODULE;
const BIND_KIND_VALUE = 0b000000000001,
      BIND_KIND_TYPE = 0b000000000010,
      BIND_SCOPE_VAR = 0b000000000100,
      BIND_SCOPE_LEXICAL = 0b000000001000,
      BIND_SCOPE_FUNCTION = 0b000000010000,
      BIND_FLAGS_NONE = 0b000001000000,
      BIND_FLAGS_CLASS = 0b000010000000,
      BIND_FLAGS_TS_ENUM = 0b000100000000,
      BIND_FLAGS_TS_CONST_ENUM = 0b001000000000,
      BIND_FLAGS_TS_EXPORT_ONLY = 0b010000000000,
      BIND_FLAGS_FLOW_DECLARE_FN = 0b100000000000;
const BIND_CLASS = BIND_KIND_VALUE | BIND_KIND_TYPE | BIND_SCOPE_LEXICAL | BIND_FLAGS_CLASS,
      BIND_LEXICAL = BIND_KIND_VALUE | 0 | BIND_SCOPE_LEXICAL | 0,
      BIND_VAR = BIND_KIND_VALUE | 0 | BIND_SCOPE_VAR | 0,
      BIND_FUNCTION = BIND_KIND_VALUE | 0 | BIND_SCOPE_FUNCTION | 0,
      BIND_TS_INTERFACE = 0 | BIND_KIND_TYPE | 0 | BIND_FLAGS_CLASS,
      BIND_TS_TYPE = 0 | BIND_KIND_TYPE | 0 | 0,
      BIND_TS_ENUM = BIND_KIND_VALUE | BIND_KIND_TYPE | BIND_SCOPE_LEXICAL | BIND_FLAGS_TS_ENUM,
      BIND_TS_AMBIENT = 0 | 0 | 0 | BIND_FLAGS_TS_EXPORT_ONLY,
      BIND_NONE = 0 | 0 | 0 | BIND_FLAGS_NONE,
      BIND_OUTSIDE = BIND_KIND_VALUE | 0 | 0 | BIND_FLAGS_NONE,
      BIND_TS_CONST_ENUM = BIND_TS_ENUM | BIND_FLAGS_TS_CONST_ENUM,
      BIND_TS_NAMESPACE = 0 | 0 | 0 | BIND_FLAGS_TS_EXPORT_ONLY,
      BIND_FLOW_DECLARE_FN = BIND_FLAGS_FLOW_DECLARE_FN;
const CLASS_ELEMENT_FLAG_STATIC = 0b100,
      CLASS_ELEMENT_KIND_GETTER = 0b010,
      CLASS_ELEMENT_KIND_SETTER = 0b001,
      CLASS_ELEMENT_KIND_ACCESSOR = CLASS_ELEMENT_KIND_GETTER | CLASS_ELEMENT_KIND_SETTER;
const CLASS_ELEMENT_STATIC_GETTER = CLASS_ELEMENT_KIND_GETTER | CLASS_ELEMENT_FLAG_STATIC,
      CLASS_ELEMENT_STATIC_SETTER = CLASS_ELEMENT_KIND_SETTER | CLASS_ELEMENT_FLAG_STATIC,
      CLASS_ELEMENT_INSTANCE_GETTER = CLASS_ELEMENT_KIND_GETTER,
      CLASS_ELEMENT_INSTANCE_SETTER = CLASS_ELEMENT_KIND_SETTER,
      CLASS_ELEMENT_OTHER = 0;

class Scope {
  constructor(flags) {
    this.var = new Set();
    this.lexical = new Set();
    this.functions = new Set();
    this.flags = flags;
  }

}
class ScopeHandler {
  constructor(raise, inModule) {
    this.scopeStack = [];
    this.undefinedExports = new Map();
    this.undefinedPrivateNames = new Map();
    this.raise = raise;
    this.inModule = inModule;
  }

  get inFunction() {
    return (this.currentVarScopeFlags() & SCOPE_FUNCTION) > 0;
  }

  get allowSuper() {
    return (this.currentThisScopeFlags() & SCOPE_SUPER) > 0;
  }

  get allowDirectSuper() {
    return (this.currentThisScopeFlags() & SCOPE_DIRECT_SUPER) > 0;
  }

  get inClass() {
    return (this.currentThisScopeFlags() & SCOPE_CLASS) > 0;
  }

  get inClassAndNotInNonArrowFunction() {
    const flags = this.currentThisScopeFlags();
    return (flags & SCOPE_CLASS) > 0 && (flags & SCOPE_FUNCTION) === 0;
  }

  get inStaticBlock() {
    for (let i = this.scopeStack.length - 1;; i--) {
      const {
        flags
      } = this.scopeStack[i];

      if (flags & SCOPE_STATIC_BLOCK) {
        return true;
      }

      if (flags & (SCOPE_VAR | SCOPE_CLASS)) {
        return false;
      }
    }
  }

  get inNonArrowFunction() {
    return (this.currentThisScopeFlags() & SCOPE_FUNCTION) > 0;
  }

  get treatFunctionsAsVar() {
    return this.treatFunctionsAsVarInScope(this.currentScope());
  }

  createScope(flags) {
    return new Scope(flags);
  }

  enter(flags) {
    this.scopeStack.push(this.createScope(flags));
  }

  exit() {
    this.scopeStack.pop();
  }

  treatFunctionsAsVarInScope(scope) {
    return !!(scope.flags & SCOPE_FUNCTION || !this.inModule && scope.flags & SCOPE_PROGRAM);
  }

  declareName(name, bindingType, pos) {
    let scope = this.currentScope();

    if (bindingType & BIND_SCOPE_LEXICAL || bindingType & BIND_SCOPE_FUNCTION) {
      this.checkRedeclarationInScope(scope, name, bindingType, pos);

      if (bindingType & BIND_SCOPE_FUNCTION) {
        scope.functions.add(name);
      } else {
        scope.lexical.add(name);
      }

      if (bindingType & BIND_SCOPE_LEXICAL) {
        this.maybeExportDefined(scope, name);
      }
    } else if (bindingType & BIND_SCOPE_VAR) {
      for (let i = this.scopeStack.length - 1; i >= 0; --i) {
        scope = this.scopeStack[i];
        this.checkRedeclarationInScope(scope, name, bindingType, pos);
        scope.var.add(name);
        this.maybeExportDefined(scope, name);
        if (scope.flags & SCOPE_VAR) break;
      }
    }

    if (this.inModule && scope.flags & SCOPE_PROGRAM) {
      this.undefinedExports.delete(name);
    }
  }

  maybeExportDefined(scope, name) {
    if (this.inModule && scope.flags & SCOPE_PROGRAM) {
      this.undefinedExports.delete(name);
    }
  }

  checkRedeclarationInScope(scope, name, bindingType, pos) {
    if (this.isRedeclaredInScope(scope, name, bindingType)) {
      this.raise(pos, ErrorMessages.VarRedeclaration, name);
    }
  }

  isRedeclaredInScope(scope, name, bindingType) {
    if (!(bindingType & BIND_KIND_VALUE)) return false;

    if (bindingType & BIND_SCOPE_LEXICAL) {
      return scope.lexical.has(name) || scope.functions.has(name) || scope.var.has(name);
    }

    if (bindingType & BIND_SCOPE_FUNCTION) {
      return scope.lexical.has(name) || !this.treatFunctionsAsVarInScope(scope) && scope.var.has(name);
    }

    return scope.lexical.has(name) && !(scope.flags & SCOPE_SIMPLE_CATCH && scope.lexical.values().next().value === name) || !this.treatFunctionsAsVarInScope(scope) && scope.functions.has(name);
  }

  checkLocalExport(id) {
    const {
      name
    } = id;
    const topLevelScope = this.scopeStack[0];

    if (!topLevelScope.lexical.has(name) && !topLevelScope.var.has(name) && !topLevelScope.functions.has(name)) {
      this.undefinedExports.set(name, id.start);
    }
  }

  currentScope() {
    return this.scopeStack[this.scopeStack.length - 1];
  }

  currentVarScopeFlags() {
    for (let i = this.scopeStack.length - 1;; i--) {
      const {
        flags
      } = this.scopeStack[i];

      if (flags & SCOPE_VAR) {
        return flags;
      }
    }
  }

  currentThisScopeFlags() {
    for (let i = this.scopeStack.length - 1;; i--) {
      const {
        flags
      } = this.scopeStack[i];

      if (flags & (SCOPE_VAR | SCOPE_CLASS) && !(flags & SCOPE_ARROW)) {
        return flags;
      }
    }
  }

}

class FlowScope extends Scope {
  constructor(...args) {
    super(...args);
    this.declareFunctions = new Set();
  }

}

class FlowScopeHandler extends ScopeHandler {
  createScope(flags) {
    return new FlowScope(flags);
  }

  declareName(name, bindingType, pos) {
    const scope = this.currentScope();

    if (bindingType & BIND_FLAGS_FLOW_DECLARE_FN) {
      this.checkRedeclarationInScope(scope, name, bindingType, pos);
      this.maybeExportDefined(scope, name);
      scope.declareFunctions.add(name);
      return;
    }

    super.declareName(...arguments);
  }

  isRedeclaredInScope(scope, name, bindingType) {
    if (super.isRedeclaredInScope(...arguments)) return true;

    if (bindingType & BIND_FLAGS_FLOW_DECLARE_FN) {
      return !scope.declareFunctions.has(name) && (scope.lexical.has(name) || scope.functions.has(name));
    }

    return false;
  }

  checkLocalExport(id) {
    if (!this.scopeStack[0].declareFunctions.has(id.name)) {
      super.checkLocalExport(id);
    }
  }

}

class State {
  constructor() {
    this.strict = void 0;
    this.curLine = void 0;
    this.lineStart = void 0;
    this.startLoc = void 0;
    this.endLoc = void 0;
    this.errors = [];
    this.potentialArrowAt = -1;
    this.noArrowAt = [];
    this.noArrowParamsConversionAt = [];
    this.maybeInArrowParameters = false;
    this.inType = false;
    this.noAnonFunctionType = false;
    this.hasFlowComment = false;
    this.isAmbientContext = false;
    this.inAbstractClass = false;
    this.topicContext = {
      maxNumOfResolvableTopics: 0,
      maxTopicIndex: null
    };
    this.soloAwait = false;
    this.inFSharpPipelineDirectBody = false;
    this.labels = [];
    this.decoratorStack = [[]];
    this.comments = [];
    this.commentStack = [];
    this.pos = 0;
    this.type = 129;
    this.value = null;
    this.start = 0;
    this.end = 0;
    this.lastTokEndLoc = null;
    this.lastTokStartLoc = null;
    this.lastTokStart = 0;
    this.lastTokEnd = 0;
    this.context = [types.brace];
    this.canStartJSXElement = true;
    this.containsEsc = false;
    this.strictErrors = new Map();
    this.tokensLength = 0;
  }

  init({
    strictMode,
    sourceType,
    startLine,
    startColumn
  }) {
    this.strict = strictMode === false ? false : strictMode === true ? true : sourceType === "module";
    this.curLine = startLine;
    this.lineStart = -startColumn;
    this.startLoc = this.endLoc = new Position(startLine, startColumn);
  }

  curPosition() {
    return new Position(this.curLine, this.pos - this.lineStart);
  }

  clone(skipArrays) {
    const state = new State();
    const keys = Object.keys(this);

    for (let i = 0, length = keys.length; i < length; i++) {
      const key = keys[i];
      let val = this[key];

      if (!skipArrays && Array.isArray(val)) {
        val = val.slice();
      }

      state[key] = val;
    }

    return state;
  }

}

var _isDigit = function isDigit(code) {
  return code >= 48 && code <= 57;
};
const VALID_REGEX_FLAGS = new Set([103, 109, 115, 105, 121, 117, 100]);
const forbiddenNumericSeparatorSiblings = {
  decBinOct: [46, 66, 69, 79, 95, 98, 101, 111],
  hex: [46, 88, 95, 120]
};
const allowedNumericSeparatorSiblings = {};
allowedNumericSeparatorSiblings.bin = [48, 49];
allowedNumericSeparatorSiblings.oct = [...allowedNumericSeparatorSiblings.bin, 50, 51, 52, 53, 54, 55];
allowedNumericSeparatorSiblings.dec = [...allowedNumericSeparatorSiblings.oct, 56, 57];
allowedNumericSeparatorSiblings.hex = [...allowedNumericSeparatorSiblings.dec, 65, 66, 67, 68, 69, 70, 97, 98, 99, 100, 101, 102];
class Token {
  constructor(state) {
    this.type = state.type;
    this.value = state.value;
    this.start = state.start;
    this.end = state.end;
    this.loc = new SourceLocation(state.startLoc, state.endLoc);
  }

}
class Tokenizer extends ParserError {
  constructor(options, input) {
    super();
    this.isLookahead = void 0;
    this.tokens = [];
    this.state = new State();
    this.state.init(options);
    this.input = input;
    this.length = input.length;
    this.isLookahead = false;
  }

  pushToken(token) {
    this.tokens.length = this.state.tokensLength;
    this.tokens.push(token);
    ++this.state.tokensLength;
  }

  next() {
    this.checkKeywordEscapes();

    if (this.options.tokens) {
      this.pushToken(new Token(this.state));
    }

    this.state.lastTokEnd = this.state.end;
    this.state.lastTokStart = this.state.start;
    this.state.lastTokEndLoc = this.state.endLoc;
    this.state.lastTokStartLoc = this.state.startLoc;
    this.nextToken();
  }

  eat(type) {
    if (this.match(type)) {
      this.next();
      return true;
    } else {
      return false;
    }
  }

  match(type) {
    return this.state.type === type;
  }

  createLookaheadState(state) {
    return {
      pos: state.pos,
      value: null,
      type: state.type,
      start: state.start,
      end: state.end,
      lastTokEnd: state.end,
      context: [this.curContext()],
      inType: state.inType
    };
  }

  lookahead() {
    const old = this.state;
    this.state = this.createLookaheadState(old);
    this.isLookahead = true;
    this.nextToken();
    this.isLookahead = false;
    const curr = this.state;
    this.state = old;
    return curr;
  }

  nextTokenStart() {
    return this.nextTokenStartSince(this.state.pos);
  }

  nextTokenStartSince(pos) {
    skipWhiteSpace.lastIndex = pos;
    return skipWhiteSpace.test(this.input) ? skipWhiteSpace.lastIndex : pos;
  }

  lookaheadCharCode() {
    return this.input.charCodeAt(this.nextTokenStart());
  }

  codePointAtPos(pos) {
    let cp = this.input.charCodeAt(pos);

    if ((cp & 0xfc00) === 0xd800 && ++pos < this.input.length) {
      const trail = this.input.charCodeAt(pos);

      if ((trail & 0xfc00) === 0xdc00) {
        cp = 0x10000 + ((cp & 0x3ff) << 10) + (trail & 0x3ff);
      }
    }

    return cp;
  }

  setStrict(strict) {
    this.state.strict = strict;

    if (strict) {
      this.state.strictErrors.forEach((message, pos) => this.raise(pos, message));
      this.state.strictErrors.clear();
    }
  }

  curContext() {
    return this.state.context[this.state.context.length - 1];
  }

  nextToken() {
    const curContext = this.curContext();
    if (!curContext.preserveSpace) this.skipSpace();
    this.state.start = this.state.pos;
    if (!this.isLookahead) this.state.startLoc = this.state.curPosition();

    if (this.state.pos >= this.length) {
      this.finishToken(129);
      return;
    }

    if (curContext === types.template) {
      this.readTmplToken();
    } else {
      this.getTokenFromCode(this.codePointAtPos(this.state.pos));
    }
  }

  skipBlockComment() {
    let startLoc;
    if (!this.isLookahead) startLoc = this.state.curPosition();
    const start = this.state.pos;
    const end = this.input.indexOf("*/", start + 2);
    if (end === -1) throw this.raise(start, ErrorMessages.UnterminatedComment);
    this.state.pos = end + 2;
    lineBreakG.lastIndex = start + 2;

    while (lineBreakG.test(this.input) && lineBreakG.lastIndex <= end) {
      ++this.state.curLine;
      this.state.lineStart = lineBreakG.lastIndex;
    }

    if (this.isLookahead) return;
    const comment = {
      type: "CommentBlock",
      value: this.input.slice(start + 2, end),
      start,
      end: end + 2,
      loc: new SourceLocation(startLoc, this.state.curPosition())
    };
    if (this.options.tokens) this.pushToken(comment);
    return comment;
  }

  skipLineComment(startSkip) {
    const start = this.state.pos;
    let startLoc;
    if (!this.isLookahead) startLoc = this.state.curPosition();
    let ch = this.input.charCodeAt(this.state.pos += startSkip);

    if (this.state.pos < this.length) {
      while (!isNewLine(ch) && ++this.state.pos < this.length) {
        ch = this.input.charCodeAt(this.state.pos);
      }
    }

    if (this.isLookahead) return;
    const end = this.state.pos;
    const value = this.input.slice(start + startSkip, end);
    const comment = {
      type: "CommentLine",
      value,
      start,
      end,
      loc: new SourceLocation(startLoc, this.state.curPosition())
    };
    if (this.options.tokens) this.pushToken(comment);
    return comment;
  }

  skipSpace() {
    const spaceStart = this.state.pos;
    const comments = [];

    loop: while (this.state.pos < this.length) {
      const ch = this.input.charCodeAt(this.state.pos);

      switch (ch) {
        case 32:
        case 160:
        case 9:
          ++this.state.pos;
          break;

        case 13:
          if (this.input.charCodeAt(this.state.pos + 1) === 10) {
            ++this.state.pos;
          }

        case 10:
        case 8232:
        case 8233:
          ++this.state.pos;
          ++this.state.curLine;
          this.state.lineStart = this.state.pos;
          break;

        case 47:
          switch (this.input.charCodeAt(this.state.pos + 1)) {
            case 42:
              {
                const comment = this.skipBlockComment();

                if (comment !== undefined) {
                  this.addComment(comment);
                  if (this.options.attachComment) comments.push(comment);
                }

                break;
              }

            case 47:
              {
                const comment = this.skipLineComment(2);

                if (comment !== undefined) {
                  this.addComment(comment);
                  if (this.options.attachComment) comments.push(comment);
                }

                break;
              }

            default:
              break loop;
          }

          break;

        default:
          if (isWhitespace(ch)) {
            ++this.state.pos;
          } else if (ch === 45 && !this.inModule) {
            const pos = this.state.pos;

            if (this.input.charCodeAt(pos + 1) === 45 && this.input.charCodeAt(pos + 2) === 62 && (spaceStart === 0 || this.state.lineStart > spaceStart)) {
              const comment = this.skipLineComment(3);

              if (comment !== undefined) {
                this.addComment(comment);
                if (this.options.attachComment) comments.push(comment);
              }
            } else {
              break loop;
            }
          } else if (ch === 60 && !this.inModule) {
            const pos = this.state.pos;

            if (this.input.charCodeAt(pos + 1) === 33 && this.input.charCodeAt(pos + 2) === 45 && this.input.charCodeAt(pos + 3) === 45) {
              const comment = this.skipLineComment(4);

              if (comment !== undefined) {
                this.addComment(comment);
                if (this.options.attachComment) comments.push(comment);
              }
            } else {
              break loop;
            }
          } else {
            break loop;
          }

      }
    }

    if (comments.length > 0) {
      const end = this.state.pos;
      const CommentWhitespace = {
        start: spaceStart,
        end,
        comments,
        leadingNode: null,
        trailingNode: null,
        containingNode: null
      };
      this.state.commentStack.push(CommentWhitespace);
    }
  }

  finishToken(type, val) {
    this.state.end = this.state.pos;
    const prevType = this.state.type;
    this.state.type = type;
    this.state.value = val;

    if (!this.isLookahead) {
      this.state.endLoc = this.state.curPosition();
      this.updateContext(prevType);
    }
  }

  replaceToken(type) {
    this.state.type = type;
    this.updateContext();
  }

  readToken_numberSign() {
    if (this.state.pos === 0 && this.readToken_interpreter()) {
      return;
    }

    const nextPos = this.state.pos + 1;
    const next = this.codePointAtPos(nextPos);

    if (next >= 48 && next <= 57) {
      throw this.raise(this.state.pos, ErrorMessages.UnexpectedDigitAfterHash);
    }

    if (next === 123 || next === 91 && this.hasPlugin("recordAndTuple")) {
      this.expectPlugin("recordAndTuple");

      if (this.getPluginOption("recordAndTuple", "syntaxType") !== "hash") {
        throw this.raise(this.state.pos, next === 123 ? ErrorMessages.RecordExpressionHashIncorrectStartSyntaxType : ErrorMessages.TupleExpressionHashIncorrectStartSyntaxType);
      }

      this.state.pos += 2;

      if (next === 123) {
        this.finishToken(7);
      } else {
        this.finishToken(1);
      }
    } else if (isIdentifierStart(next)) {
      ++this.state.pos;
      this.finishToken(128, this.readWord1(next));
    } else if (next === 92) {
      ++this.state.pos;
      this.finishToken(128, this.readWord1());
    } else {
      this.finishOp(25, 1);
    }
  }

  readToken_dot() {
    const next = this.input.charCodeAt(this.state.pos + 1);

    if (next >= 48 && next <= 57) {
      this.readNumber(true);
      return;
    }

    if (next === 46 && this.input.charCodeAt(this.state.pos + 2) === 46) {
      this.state.pos += 3;
      this.finishToken(21);
    } else {
      ++this.state.pos;
      this.finishToken(16);
    }
  }

  readToken_slash() {
    const next = this.input.charCodeAt(this.state.pos + 1);

    if (next === 61) {
      this.finishOp(29, 2);
    } else {
      this.finishOp(50, 1);
    }
  }

  readToken_interpreter() {
    if (this.state.pos !== 0 || this.length < 2) return false;
    let ch = this.input.charCodeAt(this.state.pos + 1);
    if (ch !== 33) return false;
    const start = this.state.pos;
    this.state.pos += 1;

    while (!isNewLine(ch) && ++this.state.pos < this.length) {
      ch = this.input.charCodeAt(this.state.pos);
    }

    const value = this.input.slice(start + 2, this.state.pos);
    this.finishToken(26, value);
    return true;
  }

  readToken_mult_modulo(code) {
    let type = code === 42 ? 49 : 48;
    let width = 1;
    let next = this.input.charCodeAt(this.state.pos + 1);

    if (code === 42 && next === 42) {
      width++;
      next = this.input.charCodeAt(this.state.pos + 2);
      type = 51;
    }

    if (next === 61 && !this.state.inType) {
      width++;
      type = code === 37 ? 31 : 28;
    }

    this.finishOp(type, width);
  }

  readToken_pipe_amp(code) {
    const next = this.input.charCodeAt(this.state.pos + 1);

    if (next === code) {
      if (this.input.charCodeAt(this.state.pos + 2) === 61) {
        this.finishOp(28, 3);
      } else {
        this.finishOp(code === 124 ? 37 : 38, 2);
      }

      return;
    }

    if (code === 124) {
      if (next === 62) {
        this.finishOp(35, 2);
        return;
      }

      if (this.hasPlugin("recordAndTuple") && next === 125) {
        if (this.getPluginOption("recordAndTuple", "syntaxType") !== "bar") {
          throw this.raise(this.state.pos, ErrorMessages.RecordExpressionBarIncorrectEndSyntaxType);
        }

        this.state.pos += 2;
        this.finishToken(9);
        return;
      }

      if (this.hasPlugin("recordAndTuple") && next === 93) {
        if (this.getPluginOption("recordAndTuple", "syntaxType") !== "bar") {
          throw this.raise(this.state.pos, ErrorMessages.TupleExpressionBarIncorrectEndSyntaxType);
        }

        this.state.pos += 2;
        this.finishToken(4);
        return;
      }
    }

    if (next === 61) {
      this.finishOp(28, 2);
      return;
    }

    this.finishOp(code === 124 ? 39 : 41, 1);
  }

  readToken_caret() {
    const next = this.input.charCodeAt(this.state.pos + 1);

    if (next === 61 && !this.state.inType) {
      this.finishOp(30, 2);
    } else {
      this.finishOp(40, 1);
    }
  }

  readToken_plus_min(code) {
    const next = this.input.charCodeAt(this.state.pos + 1);

    if (next === code) {
      this.finishOp(32, 2);
      return;
    }

    if (next === 61) {
      this.finishOp(28, 2);
    } else {
      this.finishOp(47, 1);
    }
  }

  readToken_lt() {
    const {
      pos
    } = this.state;
    const next = this.input.charCodeAt(pos + 1);

    if (next === 60) {
      if (this.input.charCodeAt(pos + 2) === 61) {
        this.finishOp(28, 3);
        return;
      }

      this.finishOp(46, 2);
      return;
    }

    if (next === 61) {
      this.finishOp(45, 2);
      return;
    }

    this.finishOp(43, 1);
  }

  readToken_gt() {
    const {
      pos
    } = this.state;
    const next = this.input.charCodeAt(pos + 1);

    if (next === 62) {
      const size = this.input.charCodeAt(pos + 2) === 62 ? 3 : 2;

      if (this.input.charCodeAt(pos + size) === 61) {
        this.finishOp(28, size + 1);
        return;
      }

      this.finishOp(46, size);
      return;
    }

    if (next === 61) {
      this.finishOp(45, 2);
      return;
    }

    this.finishOp(44, 1);
  }

  readToken_eq_excl(code) {
    const next = this.input.charCodeAt(this.state.pos + 1);

    if (next === 61) {
      this.finishOp(42, this.input.charCodeAt(this.state.pos + 2) === 61 ? 3 : 2);
      return;
    }

    if (code === 61 && next === 62) {
      this.state.pos += 2;
      this.finishToken(19);
      return;
    }

    this.finishOp(code === 61 ? 27 : 33, 1);
  }

  readToken_question() {
    const next = this.input.charCodeAt(this.state.pos + 1);
    const next2 = this.input.charCodeAt(this.state.pos + 2);

    if (next === 63) {
      if (next2 === 61) {
        this.finishOp(28, 3);
      } else {
        this.finishOp(36, 2);
      }
    } else if (next === 46 && !(next2 >= 48 && next2 <= 57)) {
      this.state.pos += 2;
      this.finishToken(18);
    } else {
      ++this.state.pos;
      this.finishToken(17);
    }
  }

  getTokenFromCode(code) {
    switch (code) {
      case 46:
        this.readToken_dot();
        return;

      case 40:
        ++this.state.pos;
        this.finishToken(10);
        return;

      case 41:
        ++this.state.pos;
        this.finishToken(11);
        return;

      case 59:
        ++this.state.pos;
        this.finishToken(13);
        return;

      case 44:
        ++this.state.pos;
        this.finishToken(12);
        return;

      case 91:
        if (this.hasPlugin("recordAndTuple") && this.input.charCodeAt(this.state.pos + 1) === 124) {
          if (this.getPluginOption("recordAndTuple", "syntaxType") !== "bar") {
            throw this.raise(this.state.pos, ErrorMessages.TupleExpressionBarIncorrectStartSyntaxType);
          }

          this.state.pos += 2;
          this.finishToken(2);
        } else {
          ++this.state.pos;
          this.finishToken(0);
        }

        return;

      case 93:
        ++this.state.pos;
        this.finishToken(3);
        return;

      case 123:
        if (this.hasPlugin("recordAndTuple") && this.input.charCodeAt(this.state.pos + 1) === 124) {
          if (this.getPluginOption("recordAndTuple", "syntaxType") !== "bar") {
            throw this.raise(this.state.pos, ErrorMessages.RecordExpressionBarIncorrectStartSyntaxType);
          }

          this.state.pos += 2;
          this.finishToken(6);
        } else {
          ++this.state.pos;
          this.finishToken(5);
        }

        return;

      case 125:
        ++this.state.pos;
        this.finishToken(8);
        return;

      case 58:
        if (this.hasPlugin("functionBind") && this.input.charCodeAt(this.state.pos + 1) === 58) {
          this.finishOp(15, 2);
        } else {
          ++this.state.pos;
          this.finishToken(14);
        }

        return;

      case 63:
        this.readToken_question();
        return;

      case 96:
        ++this.state.pos;
        this.finishToken(22);
        return;

      case 48:
        {
          const next = this.input.charCodeAt(this.state.pos + 1);

          if (next === 120 || next === 88) {
            this.readRadixNumber(16);
            return;
          }

          if (next === 111 || next === 79) {
            this.readRadixNumber(8);
            return;
          }

          if (next === 98 || next === 66) {
            this.readRadixNumber(2);
            return;
          }
        }

      case 49:
      case 50:
      case 51:
      case 52:
      case 53:
      case 54:
      case 55:
      case 56:
      case 57:
        this.readNumber(false);
        return;

      case 34:
      case 39:
        this.readString(code);
        return;

      case 47:
        this.readToken_slash();
        return;

      case 37:
      case 42:
        this.readToken_mult_modulo(code);
        return;

      case 124:
      case 38:
        this.readToken_pipe_amp(code);
        return;

      case 94:
        this.readToken_caret();
        return;

      case 43:
      case 45:
        this.readToken_plus_min(code);
        return;

      case 60:
        this.readToken_lt();
        return;

      case 62:
        this.readToken_gt();
        return;

      case 61:
      case 33:
        this.readToken_eq_excl(code);
        return;

      case 126:
        this.finishOp(34, 1);
        return;

      case 64:
        ++this.state.pos;
        this.finishToken(24);
        return;

      case 35:
        this.readToken_numberSign();
        return;

      case 92:
        this.readWord();
        return;

      default:
        if (isIdentifierStart(code)) {
          this.readWord(code);
          return;
        }

    }

    throw this.raise(this.state.pos, ErrorMessages.InvalidOrUnexpectedToken, String.fromCodePoint(code));
  }

  finishOp(type, size) {
    const str = this.input.slice(this.state.pos, this.state.pos + size);
    this.state.pos += size;
    this.finishToken(type, str);
  }

  readRegexp() {
    const start = this.state.start + 1;
    let escaped, inClass;
    let {
      pos
    } = this.state;

    for (;; ++pos) {
      if (pos >= this.length) {
        throw this.raise(start, ErrorMessages.UnterminatedRegExp);
      }

      const ch = this.input.charCodeAt(pos);

      if (isNewLine(ch)) {
        throw this.raise(start, ErrorMessages.UnterminatedRegExp);
      }

      if (escaped) {
        escaped = false;
      } else {
        if (ch === 91) {
          inClass = true;
        } else if (ch === 93 && inClass) {
          inClass = false;
        } else if (ch === 47 && !inClass) {
          break;
        }

        escaped = ch === 92;
      }
    }

    const content = this.input.slice(start, pos);
    ++pos;
    let mods = "";

    while (pos < this.length) {
      const cp = this.codePointAtPos(pos);
      const char = String.fromCharCode(cp);

      if (VALID_REGEX_FLAGS.has(cp)) {
        if (mods.includes(char)) {
          this.raise(pos + 1, ErrorMessages.DuplicateRegExpFlags);
        }
      } else if (isIdentifierChar(cp) || cp === 92) {
        this.raise(pos + 1, ErrorMessages.MalformedRegExpFlags);
      } else {
        break;
      }

      ++pos;
      mods += char;
    }

    this.state.pos = pos;
    this.finishToken(127, {
      pattern: content,
      flags: mods
    });
  }

  readInt(radix, len, forceLen, allowNumSeparator = true) {
    const start = this.state.pos;
    const forbiddenSiblings = radix === 16 ? forbiddenNumericSeparatorSiblings.hex : forbiddenNumericSeparatorSiblings.decBinOct;
    const allowedSiblings = radix === 16 ? allowedNumericSeparatorSiblings.hex : radix === 10 ? allowedNumericSeparatorSiblings.dec : radix === 8 ? allowedNumericSeparatorSiblings.oct : allowedNumericSeparatorSiblings.bin;
    let invalid = false;
    let total = 0;

    for (let i = 0, e = len == null ? Infinity : len; i < e; ++i) {
      const code = this.input.charCodeAt(this.state.pos);
      let val;

      if (code === 95) {
        const prev = this.input.charCodeAt(this.state.pos - 1);
        const next = this.input.charCodeAt(this.state.pos + 1);

        if (allowedSiblings.indexOf(next) === -1) {
          this.raise(this.state.pos, ErrorMessages.UnexpectedNumericSeparator);
        } else if (forbiddenSiblings.indexOf(prev) > -1 || forbiddenSiblings.indexOf(next) > -1 || Number.isNaN(next)) {
          this.raise(this.state.pos, ErrorMessages.UnexpectedNumericSeparator);
        }

        if (!allowNumSeparator) {
          this.raise(this.state.pos, ErrorMessages.NumericSeparatorInEscapeSequence);
        }

        ++this.state.pos;
        continue;
      }

      if (code >= 97) {
        val = code - 97 + 10;
      } else if (code >= 65) {
        val = code - 65 + 10;
      } else if (_isDigit(code)) {
        val = code - 48;
      } else {
        val = Infinity;
      }

      if (val >= radix) {
        if (this.options.errorRecovery && val <= 9) {
          val = 0;
          this.raise(this.state.start + i + 2, ErrorMessages.InvalidDigit, radix);
        } else if (forceLen) {
          val = 0;
          invalid = true;
        } else {
          break;
        }
      }

      ++this.state.pos;
      total = total * radix + val;
    }

    if (this.state.pos === start || len != null && this.state.pos - start !== len || invalid) {
      return null;
    }

    return total;
  }

  readRadixNumber(radix) {
    const start = this.state.pos;
    let isBigInt = false;
    this.state.pos += 2;
    const val = this.readInt(radix);

    if (val == null) {
      this.raise(this.state.start + 2, ErrorMessages.InvalidDigit, radix);
    }

    const next = this.input.charCodeAt(this.state.pos);

    if (next === 110) {
      ++this.state.pos;
      isBigInt = true;
    } else if (next === 109) {
      throw this.raise(start, ErrorMessages.InvalidDecimal);
    }

    if (isIdentifierStart(this.codePointAtPos(this.state.pos))) {
      throw this.raise(this.state.pos, ErrorMessages.NumberIdentifier);
    }

    if (isBigInt) {
      const str = this.input.slice(start, this.state.pos).replace(/[_n]/g, "");
      this.finishToken(125, str);
      return;
    }

    this.finishToken(124, val);
  }

  readNumber(startsWithDot) {
    const start = this.state.pos;
    let isFloat = false;
    let isBigInt = false;
    let isDecimal = false;
    let hasExponent = false;
    let isOctal = false;

    if (!startsWithDot && this.readInt(10) === null) {
      this.raise(start, ErrorMessages.InvalidNumber);
    }

    const hasLeadingZero = this.state.pos - start >= 2 && this.input.charCodeAt(start) === 48;

    if (hasLeadingZero) {
      const integer = this.input.slice(start, this.state.pos);
      this.recordStrictModeErrors(start, ErrorMessages.StrictOctalLiteral);

      if (!this.state.strict) {
        const underscorePos = integer.indexOf("_");

        if (underscorePos > 0) {
          this.raise(underscorePos + start, ErrorMessages.ZeroDigitNumericSeparator);
        }
      }

      isOctal = hasLeadingZero && !/[89]/.test(integer);
    }

    let next = this.input.charCodeAt(this.state.pos);

    if (next === 46 && !isOctal) {
      ++this.state.pos;
      this.readInt(10);
      isFloat = true;
      next = this.input.charCodeAt(this.state.pos);
    }

    if ((next === 69 || next === 101) && !isOctal) {
      next = this.input.charCodeAt(++this.state.pos);

      if (next === 43 || next === 45) {
        ++this.state.pos;
      }

      if (this.readInt(10) === null) {
        this.raise(start, ErrorMessages.InvalidOrMissingExponent);
      }

      isFloat = true;
      hasExponent = true;
      next = this.input.charCodeAt(this.state.pos);
    }

    if (next === 110) {
      if (isFloat || hasLeadingZero) {
        this.raise(start, ErrorMessages.InvalidBigIntLiteral);
      }

      ++this.state.pos;
      isBigInt = true;
    }

    if (next === 109) {
      this.expectPlugin("decimal", this.state.pos);

      if (hasExponent || hasLeadingZero) {
        this.raise(start, ErrorMessages.InvalidDecimal);
      }

      ++this.state.pos;
      isDecimal = true;
    }

    if (isIdentifierStart(this.codePointAtPos(this.state.pos))) {
      throw this.raise(this.state.pos, ErrorMessages.NumberIdentifier);
    }

    const str = this.input.slice(start, this.state.pos).replace(/[_mn]/g, "");

    if (isBigInt) {
      this.finishToken(125, str);
      return;
    }

    if (isDecimal) {
      this.finishToken(126, str);
      return;
    }

    const val = isOctal ? parseInt(str, 8) : parseFloat(str);
    this.finishToken(124, val);
  }

  readCodePoint(throwOnInvalid) {
    const ch = this.input.charCodeAt(this.state.pos);
    let code;

    if (ch === 123) {
      const codePos = ++this.state.pos;
      code = this.readHexChar(this.input.indexOf("}", this.state.pos) - this.state.pos, true, throwOnInvalid);
      ++this.state.pos;

      if (code !== null && code > 0x10ffff) {
        if (throwOnInvalid) {
          this.raise(codePos, ErrorMessages.InvalidCodePoint);
        } else {
          return null;
        }
      }
    } else {
      code = this.readHexChar(4, false, throwOnInvalid);
    }

    return code;
  }

  readString(quote) {
    let out = "",
        chunkStart = ++this.state.pos;

    for (;;) {
      if (this.state.pos >= this.length) {
        throw this.raise(this.state.start, ErrorMessages.UnterminatedString);
      }

      const ch = this.input.charCodeAt(this.state.pos);
      if (ch === quote) break;

      if (ch === 92) {
        out += this.input.slice(chunkStart, this.state.pos);
        out += this.readEscapedChar(false);
        chunkStart = this.state.pos;
      } else if (ch === 8232 || ch === 8233) {
        ++this.state.pos;
        ++this.state.curLine;
        this.state.lineStart = this.state.pos;
      } else if (isNewLine(ch)) {
        throw this.raise(this.state.start, ErrorMessages.UnterminatedString);
      } else {
        ++this.state.pos;
      }
    }

    out += this.input.slice(chunkStart, this.state.pos++);
    this.finishToken(123, out);
  }

  readTmplToken() {
    let out = "",
        chunkStart = this.state.pos,
        containsInvalid = false;

    for (;;) {
      if (this.state.pos >= this.length) {
        throw this.raise(this.state.start, ErrorMessages.UnterminatedTemplate);
      }

      const ch = this.input.charCodeAt(this.state.pos);

      if (ch === 96 || ch === 36 && this.input.charCodeAt(this.state.pos + 1) === 123) {
        if (this.state.pos === this.state.start && this.match(20)) {
          if (ch === 36) {
            this.state.pos += 2;
            this.finishToken(23);
            return;
          } else {
            ++this.state.pos;
            this.finishToken(22);
            return;
          }
        }

        out += this.input.slice(chunkStart, this.state.pos);
        this.finishToken(20, containsInvalid ? null : out);
        return;
      }

      if (ch === 92) {
        out += this.input.slice(chunkStart, this.state.pos);
        const escaped = this.readEscapedChar(true);

        if (escaped === null) {
          containsInvalid = true;
        } else {
          out += escaped;
        }

        chunkStart = this.state.pos;
      } else if (isNewLine(ch)) {
        out += this.input.slice(chunkStart, this.state.pos);
        ++this.state.pos;

        switch (ch) {
          case 13:
            if (this.input.charCodeAt(this.state.pos) === 10) {
              ++this.state.pos;
            }

          case 10:
            out += "\n";
            break;

          default:
            out += String.fromCharCode(ch);
            break;
        }

        ++this.state.curLine;
        this.state.lineStart = this.state.pos;
        chunkStart = this.state.pos;
      } else {
        ++this.state.pos;
      }
    }
  }

  recordStrictModeErrors(pos, message) {
    if (this.state.strict && !this.state.strictErrors.has(pos)) {
      this.raise(pos, message);
    } else {
      this.state.strictErrors.set(pos, message);
    }
  }

  readEscapedChar(inTemplate) {
    const throwOnInvalid = !inTemplate;
    const ch = this.input.charCodeAt(++this.state.pos);
    ++this.state.pos;

    switch (ch) {
      case 110:
        return "\n";

      case 114:
        return "\r";

      case 120:
        {
          const code = this.readHexChar(2, false, throwOnInvalid);
          return code === null ? null : String.fromCharCode(code);
        }

      case 117:
        {
          const code = this.readCodePoint(throwOnInvalid);
          return code === null ? null : String.fromCodePoint(code);
        }

      case 116:
        return "\t";

      case 98:
        return "\b";

      case 118:
        return "\u000b";

      case 102:
        return "\f";

      case 13:
        if (this.input.charCodeAt(this.state.pos) === 10) {
          ++this.state.pos;
        }

      case 10:
        this.state.lineStart = this.state.pos;
        ++this.state.curLine;

      case 8232:
      case 8233:
        return "";

      case 56:
      case 57:
        if (inTemplate) {
          return null;
        } else {
          this.recordStrictModeErrors(this.state.pos - 1, ErrorMessages.StrictNumericEscape);
        }

      default:
        if (ch >= 48 && ch <= 55) {
          const codePos = this.state.pos - 1;
          const match = this.input.substr(this.state.pos - 1, 3).match(/^[0-7]+/);
          let octalStr = match[0];
          let octal = parseInt(octalStr, 8);

          if (octal > 255) {
            octalStr = octalStr.slice(0, -1);
            octal = parseInt(octalStr, 8);
          }

          this.state.pos += octalStr.length - 1;
          const next = this.input.charCodeAt(this.state.pos);

          if (octalStr !== "0" || next === 56 || next === 57) {
            if (inTemplate) {
              return null;
            } else {
              this.recordStrictModeErrors(codePos, ErrorMessages.StrictNumericEscape);
            }
          }

          return String.fromCharCode(octal);
        }

        return String.fromCharCode(ch);
    }
  }

  readHexChar(len, forceLen, throwOnInvalid) {
    const codePos = this.state.pos;
    const n = this.readInt(16, len, forceLen, false);

    if (n === null) {
      if (throwOnInvalid) {
        this.raise(codePos, ErrorMessages.InvalidEscapeSequence);
      } else {
        this.state.pos = codePos - 1;
      }
    }

    return n;
  }

  readWord1(firstCode) {
    this.state.containsEsc = false;
    let word = "";
    const start = this.state.pos;
    let chunkStart = this.state.pos;

    if (firstCode !== undefined) {
      this.state.pos += firstCode <= 0xffff ? 1 : 2;
    }

    while (this.state.pos < this.length) {
      const ch = this.codePointAtPos(this.state.pos);

      if (isIdentifierChar(ch)) {
        this.state.pos += ch <= 0xffff ? 1 : 2;
      } else if (ch === 92) {
        this.state.containsEsc = true;
        word += this.input.slice(chunkStart, this.state.pos);
        const escStart = this.state.pos;
        const identifierCheck = this.state.pos === start ? isIdentifierStart : isIdentifierChar;

        if (this.input.charCodeAt(++this.state.pos) !== 117) {
          this.raise(this.state.pos, ErrorMessages.MissingUnicodeEscape);
          chunkStart = this.state.pos - 1;
          continue;
        }

        ++this.state.pos;
        const esc = this.readCodePoint(true);

        if (esc !== null) {
          if (!identifierCheck(esc)) {
            this.raise(escStart, ErrorMessages.EscapedCharNotAnIdentifier);
          }

          word += String.fromCodePoint(esc);
        }

        chunkStart = this.state.pos;
      } else {
        break;
      }
    }

    return word + this.input.slice(chunkStart, this.state.pos);
  }

  readWord(firstCode) {
    const word = this.readWord1(firstCode);
    const type = keywords$1.get(word);

    if (type !== undefined) {
      this.finishToken(type, tokenLabelName(type));
    } else {
      this.finishToken(122, word);
    }
  }

  checkKeywordEscapes() {
    const {
      type
    } = this.state;

    if (tokenIsKeyword(type) && this.state.containsEsc) {
      this.raise(this.state.start, ErrorMessages.InvalidEscapedReservedWord, tokenLabelName(type));
    }
  }

  updateContext(prevType) {
    const {
      context,
      type
    } = this.state;

    switch (type) {
      case 8:
        context.pop();
        break;

      case 5:
      case 7:
      case 23:
        context.push(types.brace);
        break;

      case 22:
        if (context[context.length - 1] === types.template) {
          context.pop();
        } else {
          context.push(types.template);
        }

        break;
    }
  }

}

class ClassScope {
  constructor() {
    this.privateNames = new Set();
    this.loneAccessors = new Map();
    this.undefinedPrivateNames = new Map();
  }

}
class ClassScopeHandler {
  constructor(raise) {
    this.stack = [];
    this.undefinedPrivateNames = new Map();
    this.raise = raise;
  }

  current() {
    return this.stack[this.stack.length - 1];
  }

  enter() {
    this.stack.push(new ClassScope());
  }

  exit() {
    const oldClassScope = this.stack.pop();
    const current = this.current();

    for (const [name, pos] of Array.from(oldClassScope.undefinedPrivateNames)) {
      if (current) {
        if (!current.undefinedPrivateNames.has(name)) {
          current.undefinedPrivateNames.set(name, pos);
        }
      } else {
        this.raise(pos, ErrorMessages.InvalidPrivateFieldResolution, name);
      }
    }
  }

  declarePrivateName(name, elementType, pos) {
    const classScope = this.current();
    let redefined = classScope.privateNames.has(name);

    if (elementType & CLASS_ELEMENT_KIND_ACCESSOR) {
      const accessor = redefined && classScope.loneAccessors.get(name);

      if (accessor) {
        const oldStatic = accessor & CLASS_ELEMENT_FLAG_STATIC;
        const newStatic = elementType & CLASS_ELEMENT_FLAG_STATIC;
        const oldKind = accessor & CLASS_ELEMENT_KIND_ACCESSOR;
        const newKind = elementType & CLASS_ELEMENT_KIND_ACCESSOR;
        redefined = oldKind === newKind || oldStatic !== newStatic;
        if (!redefined) classScope.loneAccessors.delete(name);
      } else if (!redefined) {
        classScope.loneAccessors.set(name, elementType);
      }
    }

    if (redefined) {
      this.raise(pos, ErrorMessages.PrivateNameRedeclaration, name);
    }

    classScope.privateNames.add(name);
    classScope.undefinedPrivateNames.delete(name);
  }

  usePrivateName(name, pos) {
    let classScope;

    for (classScope of this.stack) {
      if (classScope.privateNames.has(name)) return;
    }

    if (classScope) {
      classScope.undefinedPrivateNames.set(name, pos);
    } else {
      this.raise(pos, ErrorMessages.InvalidPrivateFieldResolution, name);
    }
  }

}

const kExpression = 0,
      kMaybeArrowParameterDeclaration = 1,
      kMaybeAsyncArrowParameterDeclaration = 2,
      kParameterDeclaration = 3;

class ExpressionScope {
  constructor(type = kExpression) {
    this.type = void 0;
    this.type = type;
  }

  canBeArrowParameterDeclaration() {
    return this.type === kMaybeAsyncArrowParameterDeclaration || this.type === kMaybeArrowParameterDeclaration;
  }

  isCertainlyParameterDeclaration() {
    return this.type === kParameterDeclaration;
  }

}

class ArrowHeadParsingScope extends ExpressionScope {
  constructor(type) {
    super(type);
    this.errors = new Map();
  }

  recordDeclarationError(pos, template) {
    this.errors.set(pos, template);
  }

  clearDeclarationError(pos) {
    this.errors.delete(pos);
  }

  iterateErrors(iterator) {
    this.errors.forEach(iterator);
  }

}

class ExpressionScopeHandler {
  constructor(raise) {
    this.stack = [new ExpressionScope()];
    this.raise = raise;
  }

  enter(scope) {
    this.stack.push(scope);
  }

  exit() {
    this.stack.pop();
  }

  recordParameterInitializerError(pos, template) {
    const {
      stack
    } = this;
    let i = stack.length - 1;
    let scope = stack[i];

    while (!scope.isCertainlyParameterDeclaration()) {
      if (scope.canBeArrowParameterDeclaration()) {
        scope.recordDeclarationError(pos, template);
      } else {
        return;
      }

      scope = stack[--i];
    }

    this.raise(pos, template);
  }

  recordParenthesizedIdentifierError(pos, template) {
    const {
      stack
    } = this;
    const scope = stack[stack.length - 1];

    if (scope.isCertainlyParameterDeclaration()) {
      this.raise(pos, template);
    } else if (scope.canBeArrowParameterDeclaration()) {
      scope.recordDeclarationError(pos, template);
    } else {
      return;
    }
  }

  recordAsyncArrowParametersError(pos, template) {
    const {
      stack
    } = this;
    let i = stack.length - 1;
    let scope = stack[i];

    while (scope.canBeArrowParameterDeclaration()) {
      if (scope.type === kMaybeAsyncArrowParameterDeclaration) {
        scope.recordDeclarationError(pos, template);
      }

      scope = stack[--i];
    }
  }

  validateAsPattern() {
    const {
      stack
    } = this;
    const currentScope = stack[stack.length - 1];
    if (!currentScope.canBeArrowParameterDeclaration()) return;
    currentScope.iterateErrors((template, pos) => {
      this.raise(pos, template);
      let i = stack.length - 2;
      let scope = stack[i];

      while (scope.canBeArrowParameterDeclaration()) {
        scope.clearDeclarationError(pos);
        scope = stack[--i];
      }
    });
  }

}
function newParameterDeclarationScope() {
  return new ExpressionScope(kParameterDeclaration);
}
function newArrowHeadScope() {
  return new ArrowHeadParsingScope(kMaybeArrowParameterDeclaration);
}
function newAsyncArrowScope() {
  return new ArrowHeadParsingScope(kMaybeAsyncArrowParameterDeclaration);
}
function newExpressionScope() {
  return new ExpressionScope();
}

const PARAM = 0b0000,
      PARAM_YIELD = 0b0001,
      PARAM_AWAIT = 0b0010,
      PARAM_RETURN = 0b0100,
      PARAM_IN = 0b1000;
class ProductionParameterHandler {
  constructor() {
    this.stacks = [];
  }

  enter(flags) {
    this.stacks.push(flags);
  }

  exit() {
    this.stacks.pop();
  }

  currentFlags() {
    return this.stacks[this.stacks.length - 1];
  }

  get hasAwait() {
    return (this.currentFlags() & PARAM_AWAIT) > 0;
  }

  get hasYield() {
    return (this.currentFlags() & PARAM_YIELD) > 0;
  }

  get hasReturn() {
    return (this.currentFlags() & PARAM_RETURN) > 0;
  }

  get hasIn() {
    return (this.currentFlags() & PARAM_IN) > 0;
  }

}
function functionFlags(isAsync, isGenerator) {
  return (isAsync ? PARAM_AWAIT : 0) | (isGenerator ? PARAM_YIELD : 0);
}

class UtilParser extends Tokenizer {
  addExtra(node, key, val) {
    if (!node) return;
    const extra = node.extra = node.extra || {};
    extra[key] = val;
  }

  isContextual(token) {
    return this.state.type === token && !this.state.containsEsc;
  }

  isUnparsedContextual(nameStart, name) {
    const nameEnd = nameStart + name.length;

    if (this.input.slice(nameStart, nameEnd) === name) {
      const nextCh = this.input.charCodeAt(nameEnd);
      return !(isIdentifierChar(nextCh) || (nextCh & 0xfc00) === 0xd800);
    }

    return false;
  }

  isLookaheadContextual(name) {
    const next = this.nextTokenStart();
    return this.isUnparsedContextual(next, name);
  }

  eatContextual(token) {
    if (this.isContextual(token)) {
      this.next();
      return true;
    }

    return false;
  }

  expectContextual(token, template) {
    if (!this.eatContextual(token)) this.unexpected(null, template);
  }

  canInsertSemicolon() {
    return this.match(129) || this.match(8) || this.hasPrecedingLineBreak();
  }

  hasPrecedingLineBreak() {
    return lineBreak.test(this.input.slice(this.state.lastTokEnd, this.state.start));
  }

  hasFollowingLineBreak() {
    skipWhiteSpaceToLineBreak.lastIndex = this.state.end;
    return skipWhiteSpaceToLineBreak.test(this.input);
  }

  isLineTerminator() {
    return this.eat(13) || this.canInsertSemicolon();
  }

  semicolon(allowAsi = true) {
    if (allowAsi ? this.isLineTerminator() : this.eat(13)) return;
    this.raise(this.state.lastTokEnd, ErrorMessages.MissingSemicolon);
  }

  expect(type, pos) {
    this.eat(type) || this.unexpected(pos, type);
  }

  assertNoSpace(message = "Unexpected space.") {
    if (this.state.start > this.state.lastTokEnd) {
      this.raise(this.state.lastTokEnd, {
        code: ErrorCodes.SyntaxError,
        reasonCode: "UnexpectedSpace",
        template: message
      });
    }
  }

  unexpected(pos, messageOrType = {
    code: ErrorCodes.SyntaxError,
    reasonCode: "UnexpectedToken",
    template: "Unexpected token"
  }) {
    if (isTokenType(messageOrType)) {
      messageOrType = {
        code: ErrorCodes.SyntaxError,
        reasonCode: "UnexpectedToken",
        template: `Unexpected token, expected "${tokenLabelName(messageOrType)}"`
      };
    }

    throw this.raise(pos != null ? pos : this.state.start, messageOrType);
  }

  expectPlugin(name, pos) {
    if (!this.hasPlugin(name)) {
      throw this.raiseWithData(pos != null ? pos : this.state.start, {
        missingPlugin: [name]
      }, `This experimental syntax requires enabling the parser plugin: '${name}'`);
    }

    return true;
  }

  expectOnePlugin(names, pos) {
    if (!names.some(n => this.hasPlugin(n))) {
      throw this.raiseWithData(pos != null ? pos : this.state.start, {
        missingPlugin: names
      }, `This experimental syntax requires enabling one of the following parser plugin(s): '${names.join(", ")}'`);
    }
  }

  tryParse(fn, oldState = this.state.clone()) {
    const abortSignal = {
      node: null
    };

    try {
      const node = fn((node = null) => {
        abortSignal.node = node;
        throw abortSignal;
      });

      if (this.state.errors.length > oldState.errors.length) {
        const failState = this.state;
        this.state = oldState;
        this.state.tokensLength = failState.tokensLength;
        return {
          node,
          error: failState.errors[oldState.errors.length],
          thrown: false,
          aborted: false,
          failState
        };
      }

      return {
        node,
        error: null,
        thrown: false,
        aborted: false,
        failState: null
      };
    } catch (error) {
      const failState = this.state;
      this.state = oldState;

      if (error instanceof SyntaxError) {
        return {
          node: null,
          error,
          thrown: true,
          aborted: false,
          failState
        };
      }

      if (error === abortSignal) {
        return {
          node: abortSignal.node,
          error: null,
          thrown: false,
          aborted: true,
          failState
        };
      }

      throw error;
    }
  }

  checkExpressionErrors(refExpressionErrors, andThrow) {
    if (!refExpressionErrors) return false;
    const {
      shorthandAssign,
      doubleProto,
      optionalParameters
    } = refExpressionErrors;
    const hasErrors = shorthandAssign + doubleProto + optionalParameters > -3;

    if (!andThrow) {
      return hasErrors;
    } else if (hasErrors) {
      if (shorthandAssign >= 0) {
        this.unexpected(shorthandAssign);
      }

      if (doubleProto >= 0) {
        this.raise(doubleProto, ErrorMessages.DuplicateProto);
      }

      if (optionalParameters >= 0) {
        this.unexpected(optionalParameters);
      }
    }
  }

  isLiteralPropertyName() {
    return tokenIsLiteralPropertyName(this.state.type);
  }

  isPrivateName(node) {
    return node.type === "PrivateName";
  }

  getPrivateNameSV(node) {
    return node.id.name;
  }

  hasPropertyAsPrivateName(node) {
    return (node.type === "MemberExpression" || node.type === "OptionalMemberExpression") && this.isPrivateName(node.property);
  }

  isOptionalChain(node) {
    return node.type === "OptionalMemberExpression" || node.type === "OptionalCallExpression";
  }

  isObjectProperty(node) {
    return node.type === "ObjectProperty";
  }

  isObjectMethod(node) {
    return node.type === "ObjectMethod";
  }

  initializeScopes(inModule = this.options.sourceType === "module") {
    const oldLabels = this.state.labels;
    this.state.labels = [];
    const oldExportedIdentifiers = this.exportedIdentifiers;
    this.exportedIdentifiers = new Set();
    const oldInModule = this.inModule;
    this.inModule = inModule;
    const oldScope = this.scope;
    const ScopeHandler = this.getScopeHandler();
    this.scope = new ScopeHandler(this.raise.bind(this), this.inModule);
    const oldProdParam = this.prodParam;
    this.prodParam = new ProductionParameterHandler();
    const oldClassScope = this.classScope;
    this.classScope = new ClassScopeHandler(this.raise.bind(this));
    const oldExpressionScope = this.expressionScope;
    this.expressionScope = new ExpressionScopeHandler(this.raise.bind(this));
    return () => {
      this.state.labels = oldLabels;
      this.exportedIdentifiers = oldExportedIdentifiers;
      this.inModule = oldInModule;
      this.scope = oldScope;
      this.prodParam = oldProdParam;
      this.classScope = oldClassScope;
      this.expressionScope = oldExpressionScope;
    };
  }

  enterInitialScopes() {
    let paramFlags = PARAM;

    if (this.inModule) {
      paramFlags |= PARAM_AWAIT;
    }

    this.scope.enter(SCOPE_PROGRAM);
    this.prodParam.enter(paramFlags);
  }

}
class ExpressionErrors {
  constructor() {
    this.shorthandAssign = -1;
    this.doubleProto = -1;
    this.optionalParameters = -1;
  }

}

class Node {
  constructor(parser, pos, loc) {
    this.type = "";
    this.start = pos;
    this.end = 0;
    this.loc = new SourceLocation(loc);
    if (parser != null && parser.options.ranges) this.range = [pos, 0];
    if (parser != null && parser.filename) this.loc.filename = parser.filename;
  }

}

const NodePrototype = Node.prototype;
{
  NodePrototype.__clone = function () {
    const newNode = new Node();
    const keys = Object.keys(this);

    for (let i = 0, length = keys.length; i < length; i++) {
      const key = keys[i];

      if (key !== "leadingComments" && key !== "trailingComments" && key !== "innerComments") {
        newNode[key] = this[key];
      }
    }

    return newNode;
  };
}

function clonePlaceholder(node) {
  return cloneIdentifier(node);
}

function cloneIdentifier(node) {
  const {
    type,
    start,
    end,
    loc,
    range,
    extra,
    name
  } = node;
  const cloned = Object.create(NodePrototype);
  cloned.type = type;
  cloned.start = start;
  cloned.end = end;
  cloned.loc = loc;
  cloned.range = range;
  cloned.extra = extra;
  cloned.name = name;

  if (type === "Placeholder") {
    cloned.expectedNode = node.expectedNode;
  }

  return cloned;
}
function cloneStringLiteral(node) {
  const {
    type,
    start,
    end,
    loc,
    range,
    extra
  } = node;

  if (type === "Placeholder") {
    return clonePlaceholder(node);
  }

  const cloned = Object.create(NodePrototype);
  cloned.type = "StringLiteral";
  cloned.start = start;
  cloned.end = end;
  cloned.loc = loc;
  cloned.range = range;
  cloned.extra = extra;
  cloned.value = node.value;
  return cloned;
}
class NodeUtils extends UtilParser {
  startNode() {
    return new Node(this, this.state.start, this.state.startLoc);
  }

  startNodeAt(pos, loc) {
    return new Node(this, pos, loc);
  }

  startNodeAtNode(type) {
    return this.startNodeAt(type.start, type.loc.start);
  }

  finishNode(node, type) {
    return this.finishNodeAt(node, type, this.state.lastTokEnd, this.state.lastTokEndLoc);
  }

  finishNodeAt(node, type, pos, loc) {

    node.type = type;
    node.end = pos;
    node.loc.end = loc;
    if (this.options.ranges) node.range[1] = pos;
    if (this.options.attachComment) this.processComment(node);
    return node;
  }

  resetStartLocation(node, start, startLoc) {
    node.start = start;
    node.loc.start = startLoc;
    if (this.options.ranges) node.range[0] = start;
  }

  resetEndLocation(node, end = this.state.lastTokEnd, endLoc = this.state.lastTokEndLoc) {
    node.end = end;
    node.loc.end = endLoc;
    if (this.options.ranges) node.range[1] = end;
  }

  resetStartLocationFromNode(node, locationNode) {
    this.resetStartLocation(node, locationNode.start, locationNode.loc.start);
  }

}

const reservedTypes = new Set(["_", "any", "bool", "boolean", "empty", "extends", "false", "interface", "mixed", "null", "number", "static", "string", "true", "typeof", "void"]);
const FlowErrors = makeErrorTemplates({
  AmbiguousConditionalArrow: "Ambiguous expression: wrap the arrow functions in parentheses to disambiguate.",
  AmbiguousDeclareModuleKind: "Found both `declare module.exports` and `declare export` in the same module. Modules can only have 1 since they are either an ES module or they are a CommonJS module.",
  AssignReservedType: "Cannot overwrite reserved type %0.",
  DeclareClassElement: "The `declare` modifier can only appear on class fields.",
  DeclareClassFieldInitializer: "Initializers are not allowed in fields with the `declare` modifier.",
  DuplicateDeclareModuleExports: "Duplicate `declare module.exports` statement.",
  EnumBooleanMemberNotInitialized: "Boolean enum members need to be initialized. Use either `%0 = true,` or `%0 = false,` in enum `%1`.",
  EnumDuplicateMemberName: "Enum member names need to be unique, but the name `%0` has already been used before in enum `%1`.",
  EnumInconsistentMemberValues: "Enum `%0` has inconsistent member initializers. Either use no initializers, or consistently use literals (either booleans, numbers, or strings) for all member initializers.",
  EnumInvalidExplicitType: "Enum type `%1` is not valid. Use one of `boolean`, `number`, `string`, or `symbol` in enum `%0`.",
  EnumInvalidExplicitTypeUnknownSupplied: "Supplied enum type is not valid. Use one of `boolean`, `number`, `string`, or `symbol` in enum `%0`.",
  EnumInvalidMemberInitializerPrimaryType: "Enum `%0` has type `%2`, so the initializer of `%1` needs to be a %2 literal.",
  EnumInvalidMemberInitializerSymbolType: "Symbol enum members cannot be initialized. Use `%1,` in enum `%0`.",
  EnumInvalidMemberInitializerUnknownType: "The enum member initializer for `%1` needs to be a literal (either a boolean, number, or string) in enum `%0`.",
  EnumInvalidMemberName: "Enum member names cannot start with lowercase 'a' through 'z'. Instead of using `%0`, consider using `%1`, in enum `%2`.",
  EnumNumberMemberNotInitialized: "Number enum members need to be initialized, e.g. `%1 = 1` in enum `%0`.",
  EnumStringMemberInconsistentlyInitailized: "String enum members need to consistently either all use initializers, or use no initializers, in enum `%0`.",
  GetterMayNotHaveThisParam: "A getter cannot have a `this` parameter.",
  ImportTypeShorthandOnlyInPureImport: "The `type` and `typeof` keywords on named imports can only be used on regular `import` statements. It cannot be used with `import type` or `import typeof` statements.",
  InexactInsideExact: "Explicit inexact syntax cannot appear inside an explicit exact object type.",
  InexactInsideNonObject: "Explicit inexact syntax cannot appear in class or interface definitions.",
  InexactVariance: "Explicit inexact syntax cannot have variance.",
  InvalidNonTypeImportInDeclareModule: "Imports within a `declare module` body must always be `import type` or `import typeof`.",
  MissingTypeParamDefault: "Type parameter declaration needs a default, since a preceding type parameter declaration has a default.",
  NestedDeclareModule: "`declare module` cannot be used inside another `declare module`.",
  NestedFlowComment: "Cannot have a flow comment inside another flow comment.",
  PatternIsOptional: "A binding pattern parameter cannot be optional in an implementation signature.",
  SetterMayNotHaveThisParam: "A setter cannot have a `this` parameter.",
  SpreadVariance: "Spread properties cannot have variance.",
  ThisParamAnnotationRequired: "A type annotation is required for the `this` parameter.",
  ThisParamBannedInConstructor: "Constructors cannot have a `this` parameter; constructors don't bind `this` like other functions.",
  ThisParamMayNotBeOptional: "The `this` parameter cannot be optional.",
  ThisParamMustBeFirst: "The `this` parameter must be the first function parameter.",
  ThisParamNoDefault: "The `this` parameter may not have a default value.",
  TypeBeforeInitializer: "Type annotations must come before default assignments, e.g. instead of `age = 25: number` use `age: number = 25`.",
  TypeCastInPattern: "The type cast expression is expected to be wrapped with parenthesis.",
  UnexpectedExplicitInexactInObject: "Explicit inexact syntax must appear at the end of an inexact object.",
  UnexpectedReservedType: "Unexpected reserved type %0.",
  UnexpectedReservedUnderscore: "`_` is only allowed as a type argument to call or new.",
  UnexpectedSpaceBetweenModuloChecks: "Spaces between `%` and `checks` are not allowed here.",
  UnexpectedSpreadType: "Spread operator cannot appear in class or interface definitions.",
  UnexpectedSubtractionOperand: 'Unexpected token, expected "number" or "bigint".',
  UnexpectedTokenAfterTypeParameter: "Expected an arrow function after this type parameter declaration.",
  UnexpectedTypeParameterBeforeAsyncArrowFunction: "Type parameters must come after the async keyword, e.g. instead of `<T> async () => {}`, use `async <T>() => {}`.",
  UnsupportedDeclareExportKind: "`declare export %0` is not supported. Use `%1` instead.",
  UnsupportedStatementInDeclareModule: "Only declares and type imports are allowed inside declare module.",
  UnterminatedFlowComment: "Unterminated flow-comment."
}, ErrorCodes.SyntaxError, "flow");

function isEsModuleType(bodyElement) {
  return bodyElement.type === "DeclareExportAllDeclaration" || bodyElement.type === "DeclareExportDeclaration" && (!bodyElement.declaration || bodyElement.declaration.type !== "TypeAlias" && bodyElement.declaration.type !== "InterfaceDeclaration");
}

function hasTypeImportKind(node) {
  return node.importKind === "type" || node.importKind === "typeof";
}

function isMaybeDefaultImport(type) {
  return tokenIsKeywordOrIdentifier(type) && type !== 91;
}

const exportSuggestions = {
  const: "declare export var",
  let: "declare export var",
  type: "export type",
  interface: "export interface"
};

function partition(list, test) {
  const list1 = [];
  const list2 = [];

  for (let i = 0; i < list.length; i++) {
    (test(list[i], i, list) ? list1 : list2).push(list[i]);
  }

  return [list1, list2];
}

const FLOW_PRAGMA_REGEX = /\*?\s*@((?:no)?flow)\b/;
var flow = (superClass => class extends superClass {
  constructor(...args) {
    super(...args);
    this.flowPragma = undefined;
  }

  getScopeHandler() {
    return FlowScopeHandler;
  }

  shouldParseTypes() {
    return this.getPluginOption("flow", "all") || this.flowPragma === "flow";
  }

  shouldParseEnums() {
    return !!this.getPluginOption("flow", "enums");
  }

  finishToken(type, val) {
    if (type !== 123 && type !== 13 && type !== 26) {
      if (this.flowPragma === undefined) {
        this.flowPragma = null;
      }
    }

    return super.finishToken(type, val);
  }

  addComment(comment) {
    if (this.flowPragma === undefined) {
      const matches = FLOW_PRAGMA_REGEX.exec(comment.value);

      if (!matches) ; else if (matches[1] === "flow") {
        this.flowPragma = "flow";
      } else if (matches[1] === "noflow") {
        this.flowPragma = "noflow";
      } else {
        throw new Error("Unexpected flow pragma");
      }
    }

    return super.addComment(comment);
  }

  flowParseTypeInitialiser(tok) {
    const oldInType = this.state.inType;
    this.state.inType = true;
    this.expect(tok || 14);
    const type = this.flowParseType();
    this.state.inType = oldInType;
    return type;
  }

  flowParsePredicate() {
    const node = this.startNode();
    const moduloPos = this.state.start;
    this.next();
    this.expectContextual(101);

    if (this.state.lastTokStart > moduloPos + 1) {
      this.raise(moduloPos, FlowErrors.UnexpectedSpaceBetweenModuloChecks);
    }

    if (this.eat(10)) {
      node.value = this.parseExpression();
      this.expect(11);
      return this.finishNode(node, "DeclaredPredicate");
    } else {
      return this.finishNode(node, "InferredPredicate");
    }
  }

  flowParseTypeAndPredicateInitialiser() {
    const oldInType = this.state.inType;
    this.state.inType = true;
    this.expect(14);
    let type = null;
    let predicate = null;

    if (this.match(48)) {
      this.state.inType = oldInType;
      predicate = this.flowParsePredicate();
    } else {
      type = this.flowParseType();
      this.state.inType = oldInType;

      if (this.match(48)) {
        predicate = this.flowParsePredicate();
      }
    }

    return [type, predicate];
  }

  flowParseDeclareClass(node) {
    this.next();
    this.flowParseInterfaceish(node, true);
    return this.finishNode(node, "DeclareClass");
  }

  flowParseDeclareFunction(node) {
    this.next();
    const id = node.id = this.parseIdentifier();
    const typeNode = this.startNode();
    const typeContainer = this.startNode();

    if (this.match(43)) {
      typeNode.typeParameters = this.flowParseTypeParameterDeclaration();
    } else {
      typeNode.typeParameters = null;
    }

    this.expect(10);
    const tmp = this.flowParseFunctionTypeParams();
    typeNode.params = tmp.params;
    typeNode.rest = tmp.rest;
    typeNode.this = tmp._this;
    this.expect(11);
    [typeNode.returnType, node.predicate] = this.flowParseTypeAndPredicateInitialiser();
    typeContainer.typeAnnotation = this.finishNode(typeNode, "FunctionTypeAnnotation");
    id.typeAnnotation = this.finishNode(typeContainer, "TypeAnnotation");
    this.resetEndLocation(id);
    this.semicolon();
    this.scope.declareName(node.id.name, BIND_FLOW_DECLARE_FN, node.id.start);
    return this.finishNode(node, "DeclareFunction");
  }

  flowParseDeclare(node, insideModule) {
    if (this.match(74)) {
      return this.flowParseDeclareClass(node);
    } else if (this.match(62)) {
      return this.flowParseDeclareFunction(node);
    } else if (this.match(68)) {
      return this.flowParseDeclareVariable(node);
    } else if (this.eatContextual(117)) {
      if (this.match(16)) {
        return this.flowParseDeclareModuleExports(node);
      } else {
        if (insideModule) {
          this.raise(this.state.lastTokStart, FlowErrors.NestedDeclareModule);
        }

        return this.flowParseDeclareModule(node);
      }
    } else if (this.isContextual(120)) {
      return this.flowParseDeclareTypeAlias(node);
    } else if (this.isContextual(121)) {
      return this.flowParseDeclareOpaqueType(node);
    } else if (this.isContextual(119)) {
      return this.flowParseDeclareInterface(node);
    } else if (this.match(76)) {
      return this.flowParseDeclareExportDeclaration(node, insideModule);
    } else {
      throw this.unexpected();
    }
  }

  flowParseDeclareVariable(node) {
    this.next();
    node.id = this.flowParseTypeAnnotatableIdentifier(true);
    this.scope.declareName(node.id.name, BIND_VAR, node.id.start);
    this.semicolon();
    return this.finishNode(node, "DeclareVariable");
  }

  flowParseDeclareModule(node) {
    this.scope.enter(SCOPE_OTHER);

    if (this.match(123)) {
      node.id = this.parseExprAtom();
    } else {
      node.id = this.parseIdentifier();
    }

    const bodyNode = node.body = this.startNode();
    const body = bodyNode.body = [];
    this.expect(5);

    while (!this.match(8)) {
      let bodyNode = this.startNode();

      if (this.match(77)) {
        this.next();

        if (!this.isContextual(120) && !this.match(81)) {
          this.raise(this.state.lastTokStart, FlowErrors.InvalidNonTypeImportInDeclareModule);
        }

        this.parseImport(bodyNode);
      } else {
        this.expectContextual(115, FlowErrors.UnsupportedStatementInDeclareModule);
        bodyNode = this.flowParseDeclare(bodyNode, true);
      }

      body.push(bodyNode);
    }

    this.scope.exit();
    this.expect(8);
    this.finishNode(bodyNode, "BlockStatement");
    let kind = null;
    let hasModuleExport = false;
    body.forEach(bodyElement => {
      if (isEsModuleType(bodyElement)) {
        if (kind === "CommonJS") {
          this.raise(bodyElement.start, FlowErrors.AmbiguousDeclareModuleKind);
        }

        kind = "ES";
      } else if (bodyElement.type === "DeclareModuleExports") {
        if (hasModuleExport) {
          this.raise(bodyElement.start, FlowErrors.DuplicateDeclareModuleExports);
        }

        if (kind === "ES") {
          this.raise(bodyElement.start, FlowErrors.AmbiguousDeclareModuleKind);
        }

        kind = "CommonJS";
        hasModuleExport = true;
      }
    });
    node.kind = kind || "CommonJS";
    return this.finishNode(node, "DeclareModule");
  }

  flowParseDeclareExportDeclaration(node, insideModule) {
    this.expect(76);

    if (this.eat(59)) {
      if (this.match(62) || this.match(74)) {
        node.declaration = this.flowParseDeclare(this.startNode());
      } else {
        node.declaration = this.flowParseType();
        this.semicolon();
      }

      node.default = true;
      return this.finishNode(node, "DeclareExportDeclaration");
    } else {
      if (this.match(69) || this.isLet() || (this.isContextual(120) || this.isContextual(119)) && !insideModule) {
        const label = this.state.value;
        const suggestion = exportSuggestions[label];
        throw this.raise(this.state.start, FlowErrors.UnsupportedDeclareExportKind, label, suggestion);
      }

      if (this.match(68) || this.match(62) || this.match(74) || this.isContextual(121)) {
        node.declaration = this.flowParseDeclare(this.startNode());
        node.default = false;
        return this.finishNode(node, "DeclareExportDeclaration");
      } else if (this.match(49) || this.match(5) || this.isContextual(119) || this.isContextual(120) || this.isContextual(121)) {
        node = this.parseExport(node);

        if (node.type === "ExportNamedDeclaration") {
          node.type = "ExportDeclaration";
          node.default = false;
          delete node.exportKind;
        }

        node.type = "Declare" + node.type;
        return node;
      }
    }

    throw this.unexpected();
  }

  flowParseDeclareModuleExports(node) {
    this.next();
    this.expectContextual(102);
    node.typeAnnotation = this.flowParseTypeAnnotation();
    this.semicolon();
    return this.finishNode(node, "DeclareModuleExports");
  }

  flowParseDeclareTypeAlias(node) {
    this.next();
    this.flowParseTypeAlias(node);
    node.type = "DeclareTypeAlias";
    return node;
  }

  flowParseDeclareOpaqueType(node) {
    this.next();
    this.flowParseOpaqueType(node, true);
    node.type = "DeclareOpaqueType";
    return node;
  }

  flowParseDeclareInterface(node) {
    this.next();
    this.flowParseInterfaceish(node);
    return this.finishNode(node, "DeclareInterface");
  }

  flowParseInterfaceish(node, isClass = false) {
    node.id = this.flowParseRestrictedIdentifier(!isClass, true);
    this.scope.declareName(node.id.name, isClass ? BIND_FUNCTION : BIND_LEXICAL, node.id.start);

    if (this.match(43)) {
      node.typeParameters = this.flowParseTypeParameterDeclaration();
    } else {
      node.typeParameters = null;
    }

    node.extends = [];
    node.implements = [];
    node.mixins = [];

    if (this.eat(75)) {
      do {
        node.extends.push(this.flowParseInterfaceExtends());
      } while (!isClass && this.eat(12));
    }

    if (this.isContextual(108)) {
      this.next();

      do {
        node.mixins.push(this.flowParseInterfaceExtends());
      } while (this.eat(12));
    }

    if (this.isContextual(104)) {
      this.next();

      do {
        node.implements.push(this.flowParseInterfaceExtends());
      } while (this.eat(12));
    }

    node.body = this.flowParseObjectType({
      allowStatic: isClass,
      allowExact: false,
      allowSpread: false,
      allowProto: isClass,
      allowInexact: false
    });
  }

  flowParseInterfaceExtends() {
    const node = this.startNode();
    node.id = this.flowParseQualifiedTypeIdentifier();

    if (this.match(43)) {
      node.typeParameters = this.flowParseTypeParameterInstantiation();
    } else {
      node.typeParameters = null;
    }

    return this.finishNode(node, "InterfaceExtends");
  }

  flowParseInterface(node) {
    this.flowParseInterfaceish(node);
    return this.finishNode(node, "InterfaceDeclaration");
  }

  checkNotUnderscore(word) {
    if (word === "_") {
      this.raise(this.state.start, FlowErrors.UnexpectedReservedUnderscore);
    }
  }

  checkReservedType(word, startLoc, declaration) {
    if (!reservedTypes.has(word)) return;
    this.raise(startLoc, declaration ? FlowErrors.AssignReservedType : FlowErrors.UnexpectedReservedType, word);
  }

  flowParseRestrictedIdentifier(liberal, declaration) {
    this.checkReservedType(this.state.value, this.state.start, declaration);
    return this.parseIdentifier(liberal);
  }

  flowParseTypeAlias(node) {
    node.id = this.flowParseRestrictedIdentifier(false, true);
    this.scope.declareName(node.id.name, BIND_LEXICAL, node.id.start);

    if (this.match(43)) {
      node.typeParameters = this.flowParseTypeParameterDeclaration();
    } else {
      node.typeParameters = null;
    }

    node.right = this.flowParseTypeInitialiser(27);
    this.semicolon();
    return this.finishNode(node, "TypeAlias");
  }

  flowParseOpaqueType(node, declare) {
    this.expectContextual(120);
    node.id = this.flowParseRestrictedIdentifier(true, true);
    this.scope.declareName(node.id.name, BIND_LEXICAL, node.id.start);

    if (this.match(43)) {
      node.typeParameters = this.flowParseTypeParameterDeclaration();
    } else {
      node.typeParameters = null;
    }

    node.supertype = null;

    if (this.match(14)) {
      node.supertype = this.flowParseTypeInitialiser(14);
    }

    node.impltype = null;

    if (!declare) {
      node.impltype = this.flowParseTypeInitialiser(27);
    }

    this.semicolon();
    return this.finishNode(node, "OpaqueType");
  }

  flowParseTypeParameter(requireDefault = false) {
    const nodeStart = this.state.start;
    const node = this.startNode();
    const variance = this.flowParseVariance();
    const ident = this.flowParseTypeAnnotatableIdentifier();
    node.name = ident.name;
    node.variance = variance;
    node.bound = ident.typeAnnotation;

    if (this.match(27)) {
      this.eat(27);
      node.default = this.flowParseType();
    } else {
      if (requireDefault) {
        this.raise(nodeStart, FlowErrors.MissingTypeParamDefault);
      }
    }

    return this.finishNode(node, "TypeParameter");
  }

  flowParseTypeParameterDeclaration() {
    const oldInType = this.state.inType;
    const node = this.startNode();
    node.params = [];
    this.state.inType = true;

    if (this.match(43) || this.match(132)) {
      this.next();
    } else {
      this.unexpected();
    }

    let defaultRequired = false;

    do {
      const typeParameter = this.flowParseTypeParameter(defaultRequired);
      node.params.push(typeParameter);

      if (typeParameter.default) {
        defaultRequired = true;
      }

      if (!this.match(44)) {
        this.expect(12);
      }
    } while (!this.match(44));

    this.expect(44);
    this.state.inType = oldInType;
    return this.finishNode(node, "TypeParameterDeclaration");
  }

  flowParseTypeParameterInstantiation() {
    const node = this.startNode();
    const oldInType = this.state.inType;
    node.params = [];
    this.state.inType = true;
    this.expect(43);
    const oldNoAnonFunctionType = this.state.noAnonFunctionType;
    this.state.noAnonFunctionType = false;

    while (!this.match(44)) {
      node.params.push(this.flowParseType());

      if (!this.match(44)) {
        this.expect(12);
      }
    }

    this.state.noAnonFunctionType = oldNoAnonFunctionType;
    this.expect(44);
    this.state.inType = oldInType;
    return this.finishNode(node, "TypeParameterInstantiation");
  }

  flowParseTypeParameterInstantiationCallOrNew() {
    const node = this.startNode();
    const oldInType = this.state.inType;
    node.params = [];
    this.state.inType = true;
    this.expect(43);

    while (!this.match(44)) {
      node.params.push(this.flowParseTypeOrImplicitInstantiation());

      if (!this.match(44)) {
        this.expect(12);
      }
    }

    this.expect(44);
    this.state.inType = oldInType;
    return this.finishNode(node, "TypeParameterInstantiation");
  }

  flowParseInterfaceType() {
    const node = this.startNode();
    this.expectContextual(119);
    node.extends = [];

    if (this.eat(75)) {
      do {
        node.extends.push(this.flowParseInterfaceExtends());
      } while (this.eat(12));
    }

    node.body = this.flowParseObjectType({
      allowStatic: false,
      allowExact: false,
      allowSpread: false,
      allowProto: false,
      allowInexact: false
    });
    return this.finishNode(node, "InterfaceTypeAnnotation");
  }

  flowParseObjectPropertyKey() {
    return this.match(124) || this.match(123) ? this.parseExprAtom() : this.parseIdentifier(true);
  }

  flowParseObjectTypeIndexer(node, isStatic, variance) {
    node.static = isStatic;

    if (this.lookahead().type === 14) {
      node.id = this.flowParseObjectPropertyKey();
      node.key = this.flowParseTypeInitialiser();
    } else {
      node.id = null;
      node.key = this.flowParseType();
    }

    this.expect(3);
    node.value = this.flowParseTypeInitialiser();
    node.variance = variance;
    return this.finishNode(node, "ObjectTypeIndexer");
  }

  flowParseObjectTypeInternalSlot(node, isStatic) {
    node.static = isStatic;
    node.id = this.flowParseObjectPropertyKey();
    this.expect(3);
    this.expect(3);

    if (this.match(43) || this.match(10)) {
      node.method = true;
      node.optional = false;
      node.value = this.flowParseObjectTypeMethodish(this.startNodeAt(node.start, node.loc.start));
    } else {
      node.method = false;

      if (this.eat(17)) {
        node.optional = true;
      }

      node.value = this.flowParseTypeInitialiser();
    }

    return this.finishNode(node, "ObjectTypeInternalSlot");
  }

  flowParseObjectTypeMethodish(node) {
    node.params = [];
    node.rest = null;
    node.typeParameters = null;
    node.this = null;

    if (this.match(43)) {
      node.typeParameters = this.flowParseTypeParameterDeclaration();
    }

    this.expect(10);

    if (this.match(72)) {
      node.this = this.flowParseFunctionTypeParam(true);
      node.this.name = null;

      if (!this.match(11)) {
        this.expect(12);
      }
    }

    while (!this.match(11) && !this.match(21)) {
      node.params.push(this.flowParseFunctionTypeParam(false));

      if (!this.match(11)) {
        this.expect(12);
      }
    }

    if (this.eat(21)) {
      node.rest = this.flowParseFunctionTypeParam(false);
    }

    this.expect(11);
    node.returnType = this.flowParseTypeInitialiser();
    return this.finishNode(node, "FunctionTypeAnnotation");
  }

  flowParseObjectTypeCallProperty(node, isStatic) {
    const valueNode = this.startNode();
    node.static = isStatic;
    node.value = this.flowParseObjectTypeMethodish(valueNode);
    return this.finishNode(node, "ObjectTypeCallProperty");
  }

  flowParseObjectType({
    allowStatic,
    allowExact,
    allowSpread,
    allowProto,
    allowInexact
  }) {
    const oldInType = this.state.inType;
    this.state.inType = true;
    const nodeStart = this.startNode();
    nodeStart.callProperties = [];
    nodeStart.properties = [];
    nodeStart.indexers = [];
    nodeStart.internalSlots = [];
    let endDelim;
    let exact;
    let inexact = false;

    if (allowExact && this.match(6)) {
      this.expect(6);
      endDelim = 9;
      exact = true;
    } else {
      this.expect(5);
      endDelim = 8;
      exact = false;
    }

    nodeStart.exact = exact;

    while (!this.match(endDelim)) {
      let isStatic = false;
      let protoStart = null;
      let inexactStart = null;
      const node = this.startNode();

      if (allowProto && this.isContextual(109)) {
        const lookahead = this.lookahead();

        if (lookahead.type !== 14 && lookahead.type !== 17) {
          this.next();
          protoStart = this.state.start;
          allowStatic = false;
        }
      }

      if (allowStatic && this.isContextual(98)) {
        const lookahead = this.lookahead();

        if (lookahead.type !== 14 && lookahead.type !== 17) {
          this.next();
          isStatic = true;
        }
      }

      const variance = this.flowParseVariance();

      if (this.eat(0)) {
        if (protoStart != null) {
          this.unexpected(protoStart);
        }

        if (this.eat(0)) {
          if (variance) {
            this.unexpected(variance.start);
          }

          nodeStart.internalSlots.push(this.flowParseObjectTypeInternalSlot(node, isStatic));
        } else {
          nodeStart.indexers.push(this.flowParseObjectTypeIndexer(node, isStatic, variance));
        }
      } else if (this.match(10) || this.match(43)) {
        if (protoStart != null) {
          this.unexpected(protoStart);
        }

        if (variance) {
          this.unexpected(variance.start);
        }

        nodeStart.callProperties.push(this.flowParseObjectTypeCallProperty(node, isStatic));
      } else {
        let kind = "init";

        if (this.isContextual(92) || this.isContextual(97)) {
          const lookahead = this.lookahead();

          if (tokenIsLiteralPropertyName(lookahead.type)) {
            kind = this.state.value;
            this.next();
          }
        }

        const propOrInexact = this.flowParseObjectTypeProperty(node, isStatic, protoStart, variance, kind, allowSpread, allowInexact != null ? allowInexact : !exact);

        if (propOrInexact === null) {
          inexact = true;
          inexactStart = this.state.lastTokStart;
        } else {
          nodeStart.properties.push(propOrInexact);
        }
      }

      this.flowObjectTypeSemicolon();

      if (inexactStart && !this.match(8) && !this.match(9)) {
        this.raise(inexactStart, FlowErrors.UnexpectedExplicitInexactInObject);
      }
    }

    this.expect(endDelim);

    if (allowSpread) {
      nodeStart.inexact = inexact;
    }

    const out = this.finishNode(nodeStart, "ObjectTypeAnnotation");
    this.state.inType = oldInType;
    return out;
  }

  flowParseObjectTypeProperty(node, isStatic, protoStart, variance, kind, allowSpread, allowInexact) {
    if (this.eat(21)) {
      const isInexactToken = this.match(12) || this.match(13) || this.match(8) || this.match(9);

      if (isInexactToken) {
        if (!allowSpread) {
          this.raise(this.state.lastTokStart, FlowErrors.InexactInsideNonObject);
        } else if (!allowInexact) {
          this.raise(this.state.lastTokStart, FlowErrors.InexactInsideExact);
        }

        if (variance) {
          this.raise(variance.start, FlowErrors.InexactVariance);
        }

        return null;
      }

      if (!allowSpread) {
        this.raise(this.state.lastTokStart, FlowErrors.UnexpectedSpreadType);
      }

      if (protoStart != null) {
        this.unexpected(protoStart);
      }

      if (variance) {
        this.raise(variance.start, FlowErrors.SpreadVariance);
      }

      node.argument = this.flowParseType();
      return this.finishNode(node, "ObjectTypeSpreadProperty");
    } else {
      node.key = this.flowParseObjectPropertyKey();
      node.static = isStatic;
      node.proto = protoStart != null;
      node.kind = kind;
      let optional = false;

      if (this.match(43) || this.match(10)) {
        node.method = true;

        if (protoStart != null) {
          this.unexpected(protoStart);
        }

        if (variance) {
          this.unexpected(variance.start);
        }

        node.value = this.flowParseObjectTypeMethodish(this.startNodeAt(node.start, node.loc.start));

        if (kind === "get" || kind === "set") {
          this.flowCheckGetterSetterParams(node);
        }

        if (!allowSpread && node.key.name === "constructor" && node.value.this) {
          this.raise(node.value.this.start, FlowErrors.ThisParamBannedInConstructor);
        }
      } else {
        if (kind !== "init") this.unexpected();
        node.method = false;

        if (this.eat(17)) {
          optional = true;
        }

        node.value = this.flowParseTypeInitialiser();
        node.variance = variance;
      }

      node.optional = optional;
      return this.finishNode(node, "ObjectTypeProperty");
    }
  }

  flowCheckGetterSetterParams(property) {
    const paramCount = property.kind === "get" ? 0 : 1;
    const start = property.start;
    const length = property.value.params.length + (property.value.rest ? 1 : 0);

    if (property.value.this) {
      this.raise(property.value.this.start, property.kind === "get" ? FlowErrors.GetterMayNotHaveThisParam : FlowErrors.SetterMayNotHaveThisParam);
    }

    if (length !== paramCount) {
      if (property.kind === "get") {
        this.raise(start, ErrorMessages.BadGetterArity);
      } else {
        this.raise(start, ErrorMessages.BadSetterArity);
      }
    }

    if (property.kind === "set" && property.value.rest) {
      this.raise(start, ErrorMessages.BadSetterRestParameter);
    }
  }

  flowObjectTypeSemicolon() {
    if (!this.eat(13) && !this.eat(12) && !this.match(8) && !this.match(9)) {
      this.unexpected();
    }
  }

  flowParseQualifiedTypeIdentifier(startPos, startLoc, id) {
    startPos = startPos || this.state.start;
    startLoc = startLoc || this.state.startLoc;
    let node = id || this.flowParseRestrictedIdentifier(true);

    while (this.eat(16)) {
      const node2 = this.startNodeAt(startPos, startLoc);
      node2.qualification = node;
      node2.id = this.flowParseRestrictedIdentifier(true);
      node = this.finishNode(node2, "QualifiedTypeIdentifier");
    }

    return node;
  }

  flowParseGenericType(startPos, startLoc, id) {
    const node = this.startNodeAt(startPos, startLoc);
    node.typeParameters = null;
    node.id = this.flowParseQualifiedTypeIdentifier(startPos, startLoc, id);

    if (this.match(43)) {
      node.typeParameters = this.flowParseTypeParameterInstantiation();
    }

    return this.finishNode(node, "GenericTypeAnnotation");
  }

  flowParseTypeofType() {
    const node = this.startNode();
    this.expect(81);
    node.argument = this.flowParsePrimaryType();
    return this.finishNode(node, "TypeofTypeAnnotation");
  }

  flowParseTupleType() {
    const node = this.startNode();
    node.types = [];
    this.expect(0);

    while (this.state.pos < this.length && !this.match(3)) {
      node.types.push(this.flowParseType());
      if (this.match(3)) break;
      this.expect(12);
    }

    this.expect(3);
    return this.finishNode(node, "TupleTypeAnnotation");
  }

  flowParseFunctionTypeParam(first) {
    let name = null;
    let optional = false;
    let typeAnnotation = null;
    const node = this.startNode();
    const lh = this.lookahead();
    const isThis = this.state.type === 72;

    if (lh.type === 14 || lh.type === 17) {
      if (isThis && !first) {
        this.raise(node.start, FlowErrors.ThisParamMustBeFirst);
      }

      name = this.parseIdentifier(isThis);

      if (this.eat(17)) {
        optional = true;

        if (isThis) {
          this.raise(node.start, FlowErrors.ThisParamMayNotBeOptional);
        }
      }

      typeAnnotation = this.flowParseTypeInitialiser();
    } else {
      typeAnnotation = this.flowParseType();
    }

    node.name = name;
    node.optional = optional;
    node.typeAnnotation = typeAnnotation;
    return this.finishNode(node, "FunctionTypeParam");
  }

  reinterpretTypeAsFunctionTypeParam(type) {
    const node = this.startNodeAt(type.start, type.loc.start);
    node.name = null;
    node.optional = false;
    node.typeAnnotation = type;
    return this.finishNode(node, "FunctionTypeParam");
  }

  flowParseFunctionTypeParams(params = []) {
    let rest = null;
    let _this = null;

    if (this.match(72)) {
      _this = this.flowParseFunctionTypeParam(true);
      _this.name = null;

      if (!this.match(11)) {
        this.expect(12);
      }
    }

    while (!this.match(11) && !this.match(21)) {
      params.push(this.flowParseFunctionTypeParam(false));

      if (!this.match(11)) {
        this.expect(12);
      }
    }

    if (this.eat(21)) {
      rest = this.flowParseFunctionTypeParam(false);
    }

    return {
      params,
      rest,
      _this
    };
  }

  flowIdentToTypeAnnotation(startPos, startLoc, node, id) {
    switch (id.name) {
      case "any":
        return this.finishNode(node, "AnyTypeAnnotation");

      case "bool":
      case "boolean":
        return this.finishNode(node, "BooleanTypeAnnotation");

      case "mixed":
        return this.finishNode(node, "MixedTypeAnnotation");

      case "empty":
        return this.finishNode(node, "EmptyTypeAnnotation");

      case "number":
        return this.finishNode(node, "NumberTypeAnnotation");

      case "string":
        return this.finishNode(node, "StringTypeAnnotation");

      case "symbol":
        return this.finishNode(node, "SymbolTypeAnnotation");

      default:
        this.checkNotUnderscore(id.name);
        return this.flowParseGenericType(startPos, startLoc, id);
    }
  }

  flowParsePrimaryType() {
    const startPos = this.state.start;
    const startLoc = this.state.startLoc;
    const node = this.startNode();
    let tmp;
    let type;
    let isGroupedType = false;
    const oldNoAnonFunctionType = this.state.noAnonFunctionType;

    switch (this.state.type) {
      case 5:
        return this.flowParseObjectType({
          allowStatic: false,
          allowExact: false,
          allowSpread: true,
          allowProto: false,
          allowInexact: true
        });

      case 6:
        return this.flowParseObjectType({
          allowStatic: false,
          allowExact: true,
          allowSpread: true,
          allowProto: false,
          allowInexact: false
        });

      case 0:
        this.state.noAnonFunctionType = false;
        type = this.flowParseTupleType();
        this.state.noAnonFunctionType = oldNoAnonFunctionType;
        return type;

      case 43:
        node.typeParameters = this.flowParseTypeParameterDeclaration();
        this.expect(10);
        tmp = this.flowParseFunctionTypeParams();
        node.params = tmp.params;
        node.rest = tmp.rest;
        node.this = tmp._this;
        this.expect(11);
        this.expect(19);
        node.returnType = this.flowParseType();
        return this.finishNode(node, "FunctionTypeAnnotation");

      case 10:
        this.next();

        if (!this.match(11) && !this.match(21)) {
          if (tokenIsIdentifier(this.state.type) || this.match(72)) {
            const token = this.lookahead().type;
            isGroupedType = token !== 17 && token !== 14;
          } else {
            isGroupedType = true;
          }
        }

        if (isGroupedType) {
          this.state.noAnonFunctionType = false;
          type = this.flowParseType();
          this.state.noAnonFunctionType = oldNoAnonFunctionType;

          if (this.state.noAnonFunctionType || !(this.match(12) || this.match(11) && this.lookahead().type === 19)) {
            this.expect(11);
            return type;
          } else {
            this.eat(12);
          }
        }

        if (type) {
          tmp = this.flowParseFunctionTypeParams([this.reinterpretTypeAsFunctionTypeParam(type)]);
        } else {
          tmp = this.flowParseFunctionTypeParams();
        }

        node.params = tmp.params;
        node.rest = tmp.rest;
        node.this = tmp._this;
        this.expect(11);
        this.expect(19);
        node.returnType = this.flowParseType();
        node.typeParameters = null;
        return this.finishNode(node, "FunctionTypeAnnotation");

      case 123:
        return this.parseLiteral(this.state.value, "StringLiteralTypeAnnotation");

      case 79:
      case 80:
        node.value = this.match(79);
        this.next();
        return this.finishNode(node, "BooleanLiteralTypeAnnotation");

      case 47:
        if (this.state.value === "-") {
          this.next();

          if (this.match(124)) {
            return this.parseLiteralAtNode(-this.state.value, "NumberLiteralTypeAnnotation", node);
          }

          if (this.match(125)) {
            return this.parseLiteralAtNode(-this.state.value, "BigIntLiteralTypeAnnotation", node);
          }

          throw this.raise(this.state.start, FlowErrors.UnexpectedSubtractionOperand);
        }

        throw this.unexpected();

      case 124:
        return this.parseLiteral(this.state.value, "NumberLiteralTypeAnnotation");

      case 125:
        return this.parseLiteral(this.state.value, "BigIntLiteralTypeAnnotation");

      case 82:
        this.next();
        return this.finishNode(node, "VoidTypeAnnotation");

      case 78:
        this.next();
        return this.finishNode(node, "NullLiteralTypeAnnotation");

      case 72:
        this.next();
        return this.finishNode(node, "ThisTypeAnnotation");

      case 49:
        this.next();
        return this.finishNode(node, "ExistsTypeAnnotation");

      case 81:
        return this.flowParseTypeofType();

      default:
        if (tokenIsKeyword(this.state.type)) {
          const label = tokenLabelName(this.state.type);
          this.next();
          return super.createIdentifier(node, label);
        } else if (tokenIsIdentifier(this.state.type)) {
          if (this.isContextual(119)) {
            return this.flowParseInterfaceType();
          }

          return this.flowIdentToTypeAnnotation(startPos, startLoc, node, this.parseIdentifier());
        }

    }

    throw this.unexpected();
  }

  flowParsePostfixType() {
    const startPos = this.state.start;
    const startLoc = this.state.startLoc;
    let type = this.flowParsePrimaryType();
    let seenOptionalIndexedAccess = false;

    while ((this.match(0) || this.match(18)) && !this.canInsertSemicolon()) {
      const node = this.startNodeAt(startPos, startLoc);
      const optional = this.eat(18);
      seenOptionalIndexedAccess = seenOptionalIndexedAccess || optional;
      this.expect(0);

      if (!optional && this.match(3)) {
        node.elementType = type;
        this.next();
        type = this.finishNode(node, "ArrayTypeAnnotation");
      } else {
        node.objectType = type;
        node.indexType = this.flowParseType();
        this.expect(3);

        if (seenOptionalIndexedAccess) {
          node.optional = optional;
          type = this.finishNode(node, "OptionalIndexedAccessType");
        } else {
          type = this.finishNode(node, "IndexedAccessType");
        }
      }
    }

    return type;
  }

  flowParsePrefixType() {
    const node = this.startNode();

    if (this.eat(17)) {
      node.typeAnnotation = this.flowParsePrefixType();
      return this.finishNode(node, "NullableTypeAnnotation");
    } else {
      return this.flowParsePostfixType();
    }
  }

  flowParseAnonFunctionWithoutParens() {
    const param = this.flowParsePrefixType();

    if (!this.state.noAnonFunctionType && this.eat(19)) {
      const node = this.startNodeAt(param.start, param.loc.start);
      node.params = [this.reinterpretTypeAsFunctionTypeParam(param)];
      node.rest = null;
      node.this = null;
      node.returnType = this.flowParseType();
      node.typeParameters = null;
      return this.finishNode(node, "FunctionTypeAnnotation");
    }

    return param;
  }

  flowParseIntersectionType() {
    const node = this.startNode();
    this.eat(41);
    const type = this.flowParseAnonFunctionWithoutParens();
    node.types = [type];

    while (this.eat(41)) {
      node.types.push(this.flowParseAnonFunctionWithoutParens());
    }

    return node.types.length === 1 ? type : this.finishNode(node, "IntersectionTypeAnnotation");
  }

  flowParseUnionType() {
    const node = this.startNode();
    this.eat(39);
    const type = this.flowParseIntersectionType();
    node.types = [type];

    while (this.eat(39)) {
      node.types.push(this.flowParseIntersectionType());
    }

    return node.types.length === 1 ? type : this.finishNode(node, "UnionTypeAnnotation");
  }

  flowParseType() {
    const oldInType = this.state.inType;
    this.state.inType = true;
    const type = this.flowParseUnionType();
    this.state.inType = oldInType;
    return type;
  }

  flowParseTypeOrImplicitInstantiation() {
    if (this.state.type === 122 && this.state.value === "_") {
      const startPos = this.state.start;
      const startLoc = this.state.startLoc;
      const node = this.parseIdentifier();
      return this.flowParseGenericType(startPos, startLoc, node);
    } else {
      return this.flowParseType();
    }
  }

  flowParseTypeAnnotation() {
    const node = this.startNode();
    node.typeAnnotation = this.flowParseTypeInitialiser();
    return this.finishNode(node, "TypeAnnotation");
  }

  flowParseTypeAnnotatableIdentifier(allowPrimitiveOverride) {
    const ident = allowPrimitiveOverride ? this.parseIdentifier() : this.flowParseRestrictedIdentifier();

    if (this.match(14)) {
      ident.typeAnnotation = this.flowParseTypeAnnotation();
      this.resetEndLocation(ident);
    }

    return ident;
  }

  typeCastToParameter(node) {
    node.expression.typeAnnotation = node.typeAnnotation;
    this.resetEndLocation(node.expression, node.typeAnnotation.end, node.typeAnnotation.loc.end);
    return node.expression;
  }

  flowParseVariance() {
    let variance = null;

    if (this.match(47)) {
      variance = this.startNode();

      if (this.state.value === "+") {
        variance.kind = "plus";
      } else {
        variance.kind = "minus";
      }

      this.next();
      this.finishNode(variance, "Variance");
    }

    return variance;
  }

  parseFunctionBody(node, allowExpressionBody, isMethod = false) {
    if (allowExpressionBody) {
      return this.forwardNoArrowParamsConversionAt(node, () => super.parseFunctionBody(node, true, isMethod));
    }

    return super.parseFunctionBody(node, false, isMethod);
  }

  parseFunctionBodyAndFinish(node, type, isMethod = false) {
    if (this.match(14)) {
      const typeNode = this.startNode();
      [typeNode.typeAnnotation, node.predicate] = this.flowParseTypeAndPredicateInitialiser();
      node.returnType = typeNode.typeAnnotation ? this.finishNode(typeNode, "TypeAnnotation") : null;
    }

    super.parseFunctionBodyAndFinish(node, type, isMethod);
  }

  parseStatement(context, topLevel) {
    if (this.state.strict && this.isContextual(119)) {
      const lookahead = this.lookahead();

      if (tokenIsKeywordOrIdentifier(lookahead.type)) {
        const node = this.startNode();
        this.next();
        return this.flowParseInterface(node);
      }
    } else if (this.shouldParseEnums() && this.isContextual(116)) {
      const node = this.startNode();
      this.next();
      return this.flowParseEnumDeclaration(node);
    }

    const stmt = super.parseStatement(context, topLevel);

    if (this.flowPragma === undefined && !this.isValidDirective(stmt)) {
      this.flowPragma = null;
    }

    return stmt;
  }

  parseExpressionStatement(node, expr) {
    if (expr.type === "Identifier") {
      if (expr.name === "declare") {
        if (this.match(74) || tokenIsIdentifier(this.state.type) || this.match(62) || this.match(68) || this.match(76)) {
          return this.flowParseDeclare(node);
        }
      } else if (tokenIsIdentifier(this.state.type)) {
        if (expr.name === "interface") {
          return this.flowParseInterface(node);
        } else if (expr.name === "type") {
          return this.flowParseTypeAlias(node);
        } else if (expr.name === "opaque") {
          return this.flowParseOpaqueType(node, false);
        }
      }
    }

    return super.parseExpressionStatement(node, expr);
  }

  shouldParseExportDeclaration() {
    const {
      type
    } = this.state;

    if (tokenIsFlowInterfaceOrTypeOrOpaque(type) || this.shouldParseEnums() && type === 116) {
      return !this.state.containsEsc;
    }

    return super.shouldParseExportDeclaration();
  }

  isExportDefaultSpecifier() {
    const {
      type
    } = this.state;

    if (tokenIsFlowInterfaceOrTypeOrOpaque(type) || this.shouldParseEnums() && type === 116) {
      return this.state.containsEsc;
    }

    return super.isExportDefaultSpecifier();
  }

  parseExportDefaultExpression() {
    if (this.shouldParseEnums() && this.isContextual(116)) {
      const node = this.startNode();
      this.next();
      return this.flowParseEnumDeclaration(node);
    }

    return super.parseExportDefaultExpression();
  }

  parseConditional(expr, startPos, startLoc, refExpressionErrors) {
    if (!this.match(17)) return expr;

    if (this.state.maybeInArrowParameters) {
      const nextCh = this.lookaheadCharCode();

      if (nextCh === 44 || nextCh === 61 || nextCh === 58 || nextCh === 41) {
        this.setOptionalParametersError(refExpressionErrors);
        return expr;
      }
    }

    this.expect(17);
    const state = this.state.clone();
    const originalNoArrowAt = this.state.noArrowAt;
    const node = this.startNodeAt(startPos, startLoc);
    let {
      consequent,
      failed
    } = this.tryParseConditionalConsequent();
    let [valid, invalid] = this.getArrowLikeExpressions(consequent);

    if (failed || invalid.length > 0) {
      const noArrowAt = [...originalNoArrowAt];

      if (invalid.length > 0) {
        this.state = state;
        this.state.noArrowAt = noArrowAt;

        for (let i = 0; i < invalid.length; i++) {
          noArrowAt.push(invalid[i].start);
        }

        ({
          consequent,
          failed
        } = this.tryParseConditionalConsequent());
        [valid, invalid] = this.getArrowLikeExpressions(consequent);
      }

      if (failed && valid.length > 1) {
        this.raise(state.start, FlowErrors.AmbiguousConditionalArrow);
      }

      if (failed && valid.length === 1) {
        this.state = state;
        noArrowAt.push(valid[0].start);
        this.state.noArrowAt = noArrowAt;
        ({
          consequent,
          failed
        } = this.tryParseConditionalConsequent());
      }
    }

    this.getArrowLikeExpressions(consequent, true);
    this.state.noArrowAt = originalNoArrowAt;
    this.expect(14);
    node.test = expr;
    node.consequent = consequent;
    node.alternate = this.forwardNoArrowParamsConversionAt(node, () => this.parseMaybeAssign(undefined, undefined));
    return this.finishNode(node, "ConditionalExpression");
  }

  tryParseConditionalConsequent() {
    this.state.noArrowParamsConversionAt.push(this.state.start);
    const consequent = this.parseMaybeAssignAllowIn();
    const failed = !this.match(14);
    this.state.noArrowParamsConversionAt.pop();
    return {
      consequent,
      failed
    };
  }

  getArrowLikeExpressions(node, disallowInvalid) {
    const stack = [node];
    const arrows = [];

    while (stack.length !== 0) {
      const node = stack.pop();

      if (node.type === "ArrowFunctionExpression") {
        if (node.typeParameters || !node.returnType) {
          this.finishArrowValidation(node);
        } else {
          arrows.push(node);
        }

        stack.push(node.body);
      } else if (node.type === "ConditionalExpression") {
        stack.push(node.consequent);
        stack.push(node.alternate);
      }
    }

    if (disallowInvalid) {
      arrows.forEach(node => this.finishArrowValidation(node));
      return [arrows, []];
    }

    return partition(arrows, node => node.params.every(param => this.isAssignable(param, true)));
  }

  finishArrowValidation(node) {
    var _node$extra;

    this.toAssignableList(node.params, (_node$extra = node.extra) == null ? void 0 : _node$extra.trailingComma, false);
    this.scope.enter(SCOPE_FUNCTION | SCOPE_ARROW);
    super.checkParams(node, false, true);
    this.scope.exit();
  }

  forwardNoArrowParamsConversionAt(node, parse) {
    let result;

    if (this.state.noArrowParamsConversionAt.indexOf(node.start) !== -1) {
      this.state.noArrowParamsConversionAt.push(this.state.start);
      result = parse();
      this.state.noArrowParamsConversionAt.pop();
    } else {
      result = parse();
    }

    return result;
  }

  parseParenItem(node, startPos, startLoc) {
    node = super.parseParenItem(node, startPos, startLoc);

    if (this.eat(17)) {
      node.optional = true;
      this.resetEndLocation(node);
    }

    if (this.match(14)) {
      const typeCastNode = this.startNodeAt(startPos, startLoc);
      typeCastNode.expression = node;
      typeCastNode.typeAnnotation = this.flowParseTypeAnnotation();
      return this.finishNode(typeCastNode, "TypeCastExpression");
    }

    return node;
  }

  assertModuleNodeAllowed(node) {
    if (node.type === "ImportDeclaration" && (node.importKind === "type" || node.importKind === "typeof") || node.type === "ExportNamedDeclaration" && node.exportKind === "type" || node.type === "ExportAllDeclaration" && node.exportKind === "type") {
      return;
    }

    super.assertModuleNodeAllowed(node);
  }

  parseExport(node) {
    const decl = super.parseExport(node);

    if (decl.type === "ExportNamedDeclaration" || decl.type === "ExportAllDeclaration") {
      decl.exportKind = decl.exportKind || "value";
    }

    return decl;
  }

  parseExportDeclaration(node) {
    if (this.isContextual(120)) {
      node.exportKind = "type";
      const declarationNode = this.startNode();
      this.next();

      if (this.match(5)) {
        node.specifiers = this.parseExportSpecifiers(true);
        this.parseExportFrom(node);
        return null;
      } else {
        return this.flowParseTypeAlias(declarationNode);
      }
    } else if (this.isContextual(121)) {
      node.exportKind = "type";
      const declarationNode = this.startNode();
      this.next();
      return this.flowParseOpaqueType(declarationNode, false);
    } else if (this.isContextual(119)) {
      node.exportKind = "type";
      const declarationNode = this.startNode();
      this.next();
      return this.flowParseInterface(declarationNode);
    } else if (this.shouldParseEnums() && this.isContextual(116)) {
      node.exportKind = "value";
      const declarationNode = this.startNode();
      this.next();
      return this.flowParseEnumDeclaration(declarationNode);
    } else {
      return super.parseExportDeclaration(node);
    }
  }

  eatExportStar(node) {
    if (super.eatExportStar(...arguments)) return true;

    if (this.isContextual(120) && this.lookahead().type === 49) {
      node.exportKind = "type";
      this.next();
      this.next();
      return true;
    }

    return false;
  }

  maybeParseExportNamespaceSpecifier(node) {
    const pos = this.state.start;
    const hasNamespace = super.maybeParseExportNamespaceSpecifier(node);

    if (hasNamespace && node.exportKind === "type") {
      this.unexpected(pos);
    }

    return hasNamespace;
  }

  parseClassId(node, isStatement, optionalId) {
    super.parseClassId(node, isStatement, optionalId);

    if (this.match(43)) {
      node.typeParameters = this.flowParseTypeParameterDeclaration();
    }
  }

  parseClassMember(classBody, member, state) {
    const pos = this.state.start;

    if (this.isContextual(115)) {
      if (this.parseClassMemberFromModifier(classBody, member)) {
        return;
      }

      member.declare = true;
    }

    super.parseClassMember(classBody, member, state);

    if (member.declare) {
      if (member.type !== "ClassProperty" && member.type !== "ClassPrivateProperty" && member.type !== "PropertyDefinition") {
        this.raise(pos, FlowErrors.DeclareClassElement);
      } else if (member.value) {
        this.raise(member.value.start, FlowErrors.DeclareClassFieldInitializer);
      }
    }
  }

  isIterator(word) {
    return word === "iterator" || word === "asyncIterator";
  }

  readIterator() {
    const word = super.readWord1();
    const fullWord = "@@" + word;

    if (!this.isIterator(word) || !this.state.inType) {
      this.raise(this.state.pos, ErrorMessages.InvalidIdentifier, fullWord);
    }

    this.finishToken(122, fullWord);
  }

  getTokenFromCode(code) {
    const next = this.input.charCodeAt(this.state.pos + 1);

    if (code === 123 && next === 124) {
      return this.finishOp(6, 2);
    } else if (this.state.inType && (code === 62 || code === 60)) {
      return this.finishOp(code === 62 ? 44 : 43, 1);
    } else if (this.state.inType && code === 63) {
      if (next === 46) {
        return this.finishOp(18, 2);
      }

      return this.finishOp(17, 1);
    } else if (isIteratorStart(code, next)) {
      this.state.pos += 2;
      return this.readIterator();
    } else {
      return super.getTokenFromCode(code);
    }
  }

  isAssignable(node, isBinding) {
    if (node.type === "TypeCastExpression") {
      return this.isAssignable(node.expression, isBinding);
    } else {
      return super.isAssignable(node, isBinding);
    }
  }

  toAssignable(node, isLHS = false) {
    if (node.type === "TypeCastExpression") {
      return super.toAssignable(this.typeCastToParameter(node), isLHS);
    } else {
      return super.toAssignable(node, isLHS);
    }
  }

  toAssignableList(exprList, trailingCommaPos, isLHS) {
    for (let i = 0; i < exprList.length; i++) {
      const expr = exprList[i];

      if ((expr == null ? void 0 : expr.type) === "TypeCastExpression") {
        exprList[i] = this.typeCastToParameter(expr);
      }
    }

    return super.toAssignableList(exprList, trailingCommaPos, isLHS);
  }

  toReferencedList(exprList, isParenthesizedExpr) {
    for (let i = 0; i < exprList.length; i++) {
      var _expr$extra;

      const expr = exprList[i];

      if (expr && expr.type === "TypeCastExpression" && !((_expr$extra = expr.extra) != null && _expr$extra.parenthesized) && (exprList.length > 1 || !isParenthesizedExpr)) {
        this.raise(expr.typeAnnotation.start, FlowErrors.TypeCastInPattern);
      }
    }

    return exprList;
  }

  parseArrayLike(close, canBePattern, isTuple, refExpressionErrors) {
    const node = super.parseArrayLike(close, canBePattern, isTuple, refExpressionErrors);

    if (canBePattern && !this.state.maybeInArrowParameters) {
      this.toReferencedList(node.elements);
    }

    return node;
  }

  checkLVal(expr, ...args) {
    if (expr.type !== "TypeCastExpression") {
      return super.checkLVal(expr, ...args);
    }
  }

  parseClassProperty(node) {
    if (this.match(14)) {
      node.typeAnnotation = this.flowParseTypeAnnotation();
    }

    return super.parseClassProperty(node);
  }

  parseClassPrivateProperty(node) {
    if (this.match(14)) {
      node.typeAnnotation = this.flowParseTypeAnnotation();
    }

    return super.parseClassPrivateProperty(node);
  }

  isClassMethod() {
    return this.match(43) || super.isClassMethod();
  }

  isClassProperty() {
    return this.match(14) || super.isClassProperty();
  }

  isNonstaticConstructor(method) {
    return !this.match(14) && super.isNonstaticConstructor(method);
  }

  pushClassMethod(classBody, method, isGenerator, isAsync, isConstructor, allowsDirectSuper) {
    if (method.variance) {
      this.unexpected(method.variance.start);
    }

    delete method.variance;

    if (this.match(43)) {
      method.typeParameters = this.flowParseTypeParameterDeclaration();
    }

    super.pushClassMethod(classBody, method, isGenerator, isAsync, isConstructor, allowsDirectSuper);

    if (method.params && isConstructor) {
      const params = method.params;

      if (params.length > 0 && this.isThisParam(params[0])) {
        this.raise(method.start, FlowErrors.ThisParamBannedInConstructor);
      }
    } else if (method.type === "MethodDefinition" && isConstructor && method.value.params) {
      const params = method.value.params;

      if (params.length > 0 && this.isThisParam(params[0])) {
        this.raise(method.start, FlowErrors.ThisParamBannedInConstructor);
      }
    }
  }

  pushClassPrivateMethod(classBody, method, isGenerator, isAsync) {
    if (method.variance) {
      this.unexpected(method.variance.start);
    }

    delete method.variance;

    if (this.match(43)) {
      method.typeParameters = this.flowParseTypeParameterDeclaration();
    }

    super.pushClassPrivateMethod(classBody, method, isGenerator, isAsync);
  }

  parseClassSuper(node) {
    super.parseClassSuper(node);

    if (node.superClass && this.match(43)) {
      node.superTypeParameters = this.flowParseTypeParameterInstantiation();
    }

    if (this.isContextual(104)) {
      this.next();
      const implemented = node.implements = [];

      do {
        const node = this.startNode();
        node.id = this.flowParseRestrictedIdentifier(true);

        if (this.match(43)) {
          node.typeParameters = this.flowParseTypeParameterInstantiation();
        } else {
          node.typeParameters = null;
        }

        implemented.push(this.finishNode(node, "ClassImplements"));
      } while (this.eat(12));
    }
  }

  checkGetterSetterParams(method) {
    super.checkGetterSetterParams(method);
    const params = this.getObjectOrClassMethodParams(method);

    if (params.length > 0) {
      const param = params[0];

      if (this.isThisParam(param) && method.kind === "get") {
        this.raise(param.start, FlowErrors.GetterMayNotHaveThisParam);
      } else if (this.isThisParam(param)) {
        this.raise(param.start, FlowErrors.SetterMayNotHaveThisParam);
      }
    }
  }

  parsePropertyNamePrefixOperator(node) {
    node.variance = this.flowParseVariance();
  }

  parseObjPropValue(prop, startPos, startLoc, isGenerator, isAsync, isPattern, isAccessor, refExpressionErrors) {
    if (prop.variance) {
      this.unexpected(prop.variance.start);
    }

    delete prop.variance;
    let typeParameters;

    if (this.match(43) && !isAccessor) {
      typeParameters = this.flowParseTypeParameterDeclaration();
      if (!this.match(10)) this.unexpected();
    }

    super.parseObjPropValue(prop, startPos, startLoc, isGenerator, isAsync, isPattern, isAccessor, refExpressionErrors);

    if (typeParameters) {
      (prop.value || prop).typeParameters = typeParameters;
    }
  }

  parseAssignableListItemTypes(param) {
    if (this.eat(17)) {
      if (param.type !== "Identifier") {
        this.raise(param.start, FlowErrors.PatternIsOptional);
      }

      if (this.isThisParam(param)) {
        this.raise(param.start, FlowErrors.ThisParamMayNotBeOptional);
      }

      param.optional = true;
    }

    if (this.match(14)) {
      param.typeAnnotation = this.flowParseTypeAnnotation();
    } else if (this.isThisParam(param)) {
      this.raise(param.start, FlowErrors.ThisParamAnnotationRequired);
    }

    if (this.match(27) && this.isThisParam(param)) {
      this.raise(param.start, FlowErrors.ThisParamNoDefault);
    }

    this.resetEndLocation(param);
    return param;
  }

  parseMaybeDefault(startPos, startLoc, left) {
    const node = super.parseMaybeDefault(startPos, startLoc, left);

    if (node.type === "AssignmentPattern" && node.typeAnnotation && node.right.start < node.typeAnnotation.start) {
      this.raise(node.typeAnnotation.start, FlowErrors.TypeBeforeInitializer);
    }

    return node;
  }

  shouldParseDefaultImport(node) {
    if (!hasTypeImportKind(node)) {
      return super.shouldParseDefaultImport(node);
    }

    return isMaybeDefaultImport(this.state.type);
  }

  parseImportSpecifierLocal(node, specifier, type, contextDescription) {
    specifier.local = hasTypeImportKind(node) ? this.flowParseRestrictedIdentifier(true, true) : this.parseIdentifier();
    this.checkLVal(specifier.local, contextDescription, BIND_LEXICAL);
    node.specifiers.push(this.finishNode(specifier, type));
  }

  maybeParseDefaultImportSpecifier(node) {
    node.importKind = "value";
    let kind = null;

    if (this.match(81)) {
      kind = "typeof";
    } else if (this.isContextual(120)) {
      kind = "type";
    }

    if (kind) {
      const lh = this.lookahead();
      const {
        type
      } = lh;

      if (kind === "type" && type === 49) {
        this.unexpected(lh.start);
      }

      if (isMaybeDefaultImport(type) || type === 5 || type === 49) {
        this.next();
        node.importKind = kind;
      }
    }

    return super.maybeParseDefaultImportSpecifier(node);
  }

  parseImportSpecifier(specifier, importedIsString, isInTypeOnlyImport, isMaybeTypeOnly) {
    const firstIdent = specifier.imported;
    let specifierTypeKind = null;

    if (firstIdent.type === "Identifier") {
      if (firstIdent.name === "type") {
        specifierTypeKind = "type";
      } else if (firstIdent.name === "typeof") {
        specifierTypeKind = "typeof";
      }
    }

    let isBinding = false;

    if (this.isContextual(87) && !this.isLookaheadContextual("as")) {
      const as_ident = this.parseIdentifier(true);

      if (specifierTypeKind !== null && !tokenIsKeywordOrIdentifier(this.state.type)) {
        specifier.imported = as_ident;
        specifier.importKind = specifierTypeKind;
        specifier.local = cloneIdentifier(as_ident);
      } else {
        specifier.imported = firstIdent;
        specifier.importKind = null;
        specifier.local = this.parseIdentifier();
      }
    } else {
      if (specifierTypeKind !== null && tokenIsKeywordOrIdentifier(this.state.type)) {
        specifier.imported = this.parseIdentifier(true);
        specifier.importKind = specifierTypeKind;
      } else {
        if (importedIsString) {
          throw this.raise(specifier.start, ErrorMessages.ImportBindingIsString, firstIdent.value);
        }

        specifier.imported = firstIdent;
        specifier.importKind = null;
      }

      if (this.eatContextual(87)) {
        specifier.local = this.parseIdentifier();
      } else {
        isBinding = true;
        specifier.local = cloneIdentifier(specifier.imported);
      }
    }

    const specifierIsTypeImport = hasTypeImportKind(specifier);

    if (isInTypeOnlyImport && specifierIsTypeImport) {
      this.raise(specifier.start, FlowErrors.ImportTypeShorthandOnlyInPureImport);
    }

    if (isInTypeOnlyImport || specifierIsTypeImport) {
      this.checkReservedType(specifier.local.name, specifier.local.start, true);
    }

    if (isBinding && !isInTypeOnlyImport && !specifierIsTypeImport) {
      this.checkReservedWord(specifier.local.name, specifier.start, true, true);
    }

    this.checkLVal(specifier.local, "import specifier", BIND_LEXICAL);
    return this.finishNode(specifier, "ImportSpecifier");
  }

  parseBindingAtom() {
    switch (this.state.type) {
      case 72:
        return this.parseIdentifier(true);

      default:
        return super.parseBindingAtom();
    }
  }

  parseFunctionParams(node, allowModifiers) {
    const kind = node.kind;

    if (kind !== "get" && kind !== "set" && this.match(43)) {
      node.typeParameters = this.flowParseTypeParameterDeclaration();
    }

    super.parseFunctionParams(node, allowModifiers);
  }

  parseVarId(decl, kind) {
    super.parseVarId(decl, kind);

    if (this.match(14)) {
      decl.id.typeAnnotation = this.flowParseTypeAnnotation();
      this.resetEndLocation(decl.id);
    }
  }

  parseAsyncArrowFromCallExpression(node, call) {
    if (this.match(14)) {
      const oldNoAnonFunctionType = this.state.noAnonFunctionType;
      this.state.noAnonFunctionType = true;
      node.returnType = this.flowParseTypeAnnotation();
      this.state.noAnonFunctionType = oldNoAnonFunctionType;
    }

    return super.parseAsyncArrowFromCallExpression(node, call);
  }

  shouldParseAsyncArrow() {
    return this.match(14) || super.shouldParseAsyncArrow();
  }

  parseMaybeAssign(refExpressionErrors, afterLeftParse) {
    var _jsx;

    let state = null;
    let jsx;

    if (this.hasPlugin("jsx") && (this.match(132) || this.match(43))) {
      state = this.state.clone();
      jsx = this.tryParse(() => super.parseMaybeAssign(refExpressionErrors, afterLeftParse), state);
      if (!jsx.error) return jsx.node;
      const {
        context
      } = this.state;
      const curContext = context[context.length - 1];

      if (curContext === types.j_oTag) {
        context.length -= 2;
      } else if (curContext === types.j_expr) {
        context.length -= 1;
      }
    }

    if ((_jsx = jsx) != null && _jsx.error || this.match(43)) {
      var _jsx2, _jsx3;

      state = state || this.state.clone();
      let typeParameters;
      const arrow = this.tryParse(abort => {
        var _arrowExpression$extr;

        typeParameters = this.flowParseTypeParameterDeclaration();
        const arrowExpression = this.forwardNoArrowParamsConversionAt(typeParameters, () => {
          const result = super.parseMaybeAssign(refExpressionErrors, afterLeftParse);
          this.resetStartLocationFromNode(result, typeParameters);
          return result;
        });
        if ((_arrowExpression$extr = arrowExpression.extra) != null && _arrowExpression$extr.parenthesized) abort();
        const expr = this.maybeUnwrapTypeCastExpression(arrowExpression);
        if (expr.type !== "ArrowFunctionExpression") abort();
        expr.typeParameters = typeParameters;
        this.resetStartLocationFromNode(expr, typeParameters);
        return arrowExpression;
      }, state);
      let arrowExpression = null;

      if (arrow.node && this.maybeUnwrapTypeCastExpression(arrow.node).type === "ArrowFunctionExpression") {
        if (!arrow.error && !arrow.aborted) {
          if (arrow.node.async) {
            this.raise(typeParameters.start, FlowErrors.UnexpectedTypeParameterBeforeAsyncArrowFunction);
          }

          return arrow.node;
        }

        arrowExpression = arrow.node;
      }

      if ((_jsx2 = jsx) != null && _jsx2.node) {
        this.state = jsx.failState;
        return jsx.node;
      }

      if (arrowExpression) {
        this.state = arrow.failState;
        return arrowExpression;
      }

      if ((_jsx3 = jsx) != null && _jsx3.thrown) throw jsx.error;
      if (arrow.thrown) throw arrow.error;
      throw this.raise(typeParameters.start, FlowErrors.UnexpectedTokenAfterTypeParameter);
    }

    return super.parseMaybeAssign(refExpressionErrors, afterLeftParse);
  }

  parseArrow(node) {
    if (this.match(14)) {
      const result = this.tryParse(() => {
        const oldNoAnonFunctionType = this.state.noAnonFunctionType;
        this.state.noAnonFunctionType = true;
        const typeNode = this.startNode();
        [typeNode.typeAnnotation, node.predicate] = this.flowParseTypeAndPredicateInitialiser();
        this.state.noAnonFunctionType = oldNoAnonFunctionType;
        if (this.canInsertSemicolon()) this.unexpected();
        if (!this.match(19)) this.unexpected();
        return typeNode;
      });
      if (result.thrown) return null;
      if (result.error) this.state = result.failState;
      node.returnType = result.node.typeAnnotation ? this.finishNode(result.node, "TypeAnnotation") : null;
    }

    return super.parseArrow(node);
  }

  shouldParseArrow(params) {
    return this.match(14) || super.shouldParseArrow(params);
  }

  setArrowFunctionParameters(node, params) {
    if (this.state.noArrowParamsConversionAt.indexOf(node.start) !== -1) {
      node.params = params;
    } else {
      super.setArrowFunctionParameters(node, params);
    }
  }

  checkParams(node, allowDuplicates, isArrowFunction) {
    if (isArrowFunction && this.state.noArrowParamsConversionAt.indexOf(node.start) !== -1) {
      return;
    }

    for (let i = 0; i < node.params.length; i++) {
      if (this.isThisParam(node.params[i]) && i > 0) {
        this.raise(node.params[i].start, FlowErrors.ThisParamMustBeFirst);
      }
    }

    return super.checkParams(...arguments);
  }

  parseParenAndDistinguishExpression(canBeArrow) {
    return super.parseParenAndDistinguishExpression(canBeArrow && this.state.noArrowAt.indexOf(this.state.start) === -1);
  }

  parseSubscripts(base, startPos, startLoc, noCalls) {
    if (base.type === "Identifier" && base.name === "async" && this.state.noArrowAt.indexOf(startPos) !== -1) {
      this.next();
      const node = this.startNodeAt(startPos, startLoc);
      node.callee = base;
      node.arguments = this.parseCallExpressionArguments(11, false);
      base = this.finishNode(node, "CallExpression");
    } else if (base.type === "Identifier" && base.name === "async" && this.match(43)) {
      const state = this.state.clone();
      const arrow = this.tryParse(abort => this.parseAsyncArrowWithTypeParameters(startPos, startLoc) || abort(), state);
      if (!arrow.error && !arrow.aborted) return arrow.node;
      const result = this.tryParse(() => super.parseSubscripts(base, startPos, startLoc, noCalls), state);
      if (result.node && !result.error) return result.node;

      if (arrow.node) {
        this.state = arrow.failState;
        return arrow.node;
      }

      if (result.node) {
        this.state = result.failState;
        return result.node;
      }

      throw arrow.error || result.error;
    }

    return super.parseSubscripts(base, startPos, startLoc, noCalls);
  }

  parseSubscript(base, startPos, startLoc, noCalls, subscriptState) {
    if (this.match(18) && this.isLookaheadToken_lt()) {
      subscriptState.optionalChainMember = true;

      if (noCalls) {
        subscriptState.stop = true;
        return base;
      }

      this.next();
      const node = this.startNodeAt(startPos, startLoc);
      node.callee = base;
      node.typeArguments = this.flowParseTypeParameterInstantiation();
      this.expect(10);
      node.arguments = this.parseCallExpressionArguments(11, false);
      node.optional = true;
      return this.finishCallExpression(node, true);
    } else if (!noCalls && this.shouldParseTypes() && this.match(43)) {
      const node = this.startNodeAt(startPos, startLoc);
      node.callee = base;
      const result = this.tryParse(() => {
        node.typeArguments = this.flowParseTypeParameterInstantiationCallOrNew();
        this.expect(10);
        node.arguments = this.parseCallExpressionArguments(11, false);
        if (subscriptState.optionalChainMember) node.optional = false;
        return this.finishCallExpression(node, subscriptState.optionalChainMember);
      });

      if (result.node) {
        if (result.error) this.state = result.failState;
        return result.node;
      }
    }

    return super.parseSubscript(base, startPos, startLoc, noCalls, subscriptState);
  }

  parseNewArguments(node) {
    let targs = null;

    if (this.shouldParseTypes() && this.match(43)) {
      targs = this.tryParse(() => this.flowParseTypeParameterInstantiationCallOrNew()).node;
    }

    node.typeArguments = targs;
    super.parseNewArguments(node);
  }

  parseAsyncArrowWithTypeParameters(startPos, startLoc) {
    const node = this.startNodeAt(startPos, startLoc);
    this.parseFunctionParams(node);
    if (!this.parseArrow(node)) return;
    return this.parseArrowExpression(node, undefined, true);
  }

  readToken_mult_modulo(code) {
    const next = this.input.charCodeAt(this.state.pos + 1);

    if (code === 42 && next === 47 && this.state.hasFlowComment) {
      this.state.hasFlowComment = false;
      this.state.pos += 2;
      this.nextToken();
      return;
    }

    super.readToken_mult_modulo(code);
  }

  readToken_pipe_amp(code) {
    const next = this.input.charCodeAt(this.state.pos + 1);

    if (code === 124 && next === 125) {
      this.finishOp(9, 2);
      return;
    }

    super.readToken_pipe_amp(code);
  }

  parseTopLevel(file, program) {
    const fileNode = super.parseTopLevel(file, program);

    if (this.state.hasFlowComment) {
      this.raise(this.state.pos, FlowErrors.UnterminatedFlowComment);
    }

    return fileNode;
  }

  skipBlockComment() {
    if (this.hasPlugin("flowComments") && this.skipFlowComment()) {
      if (this.state.hasFlowComment) {
        this.unexpected(null, FlowErrors.NestedFlowComment);
      }

      this.hasFlowCommentCompletion();
      this.state.pos += this.skipFlowComment();
      this.state.hasFlowComment = true;
      return;
    }

    if (this.state.hasFlowComment) {
      const end = this.input.indexOf("*-/", this.state.pos += 2);

      if (end === -1) {
        throw this.raise(this.state.pos - 2, ErrorMessages.UnterminatedComment);
      }

      this.state.pos = end + 3;
      return;
    }

    return super.skipBlockComment();
  }

  skipFlowComment() {
    const {
      pos
    } = this.state;
    let shiftToFirstNonWhiteSpace = 2;

    while ([32, 9].includes(this.input.charCodeAt(pos + shiftToFirstNonWhiteSpace))) {
      shiftToFirstNonWhiteSpace++;
    }

    const ch2 = this.input.charCodeAt(shiftToFirstNonWhiteSpace + pos);
    const ch3 = this.input.charCodeAt(shiftToFirstNonWhiteSpace + pos + 1);

    if (ch2 === 58 && ch3 === 58) {
      return shiftToFirstNonWhiteSpace + 2;
    }

    if (this.input.slice(shiftToFirstNonWhiteSpace + pos, shiftToFirstNonWhiteSpace + pos + 12) === "flow-include") {
      return shiftToFirstNonWhiteSpace + 12;
    }

    if (ch2 === 58 && ch3 !== 58) {
      return shiftToFirstNonWhiteSpace;
    }

    return false;
  }

  hasFlowCommentCompletion() {
    const end = this.input.indexOf("*/", this.state.pos);

    if (end === -1) {
      throw this.raise(this.state.pos, ErrorMessages.UnterminatedComment);
    }
  }

  flowEnumErrorBooleanMemberNotInitialized(pos, {
    enumName,
    memberName
  }) {
    this.raise(pos, FlowErrors.EnumBooleanMemberNotInitialized, memberName, enumName);
  }

  flowEnumErrorInvalidMemberName(pos, {
    enumName,
    memberName
  }) {
    const suggestion = memberName[0].toUpperCase() + memberName.slice(1);
    this.raise(pos, FlowErrors.EnumInvalidMemberName, memberName, suggestion, enumName);
  }

  flowEnumErrorDuplicateMemberName(pos, {
    enumName,
    memberName
  }) {
    this.raise(pos, FlowErrors.EnumDuplicateMemberName, memberName, enumName);
  }

  flowEnumErrorInconsistentMemberValues(pos, {
    enumName
  }) {
    this.raise(pos, FlowErrors.EnumInconsistentMemberValues, enumName);
  }

  flowEnumErrorInvalidExplicitType(pos, {
    enumName,
    suppliedType
  }) {
    return this.raise(pos, suppliedType === null ? FlowErrors.EnumInvalidExplicitTypeUnknownSupplied : FlowErrors.EnumInvalidExplicitType, enumName, suppliedType);
  }

  flowEnumErrorInvalidMemberInitializer(pos, {
    enumName,
    explicitType,
    memberName
  }) {
    let message = null;

    switch (explicitType) {
      case "boolean":
      case "number":
      case "string":
        message = FlowErrors.EnumInvalidMemberInitializerPrimaryType;
        break;

      case "symbol":
        message = FlowErrors.EnumInvalidMemberInitializerSymbolType;
        break;

      default:
        message = FlowErrors.EnumInvalidMemberInitializerUnknownType;
    }

    return this.raise(pos, message, enumName, memberName, explicitType);
  }

  flowEnumErrorNumberMemberNotInitialized(pos, {
    enumName,
    memberName
  }) {
    this.raise(pos, FlowErrors.EnumNumberMemberNotInitialized, enumName, memberName);
  }

  flowEnumErrorStringMemberInconsistentlyInitailized(pos, {
    enumName
  }) {
    this.raise(pos, FlowErrors.EnumStringMemberInconsistentlyInitailized, enumName);
  }

  flowEnumMemberInit() {
    const startPos = this.state.start;

    const endOfInit = () => this.match(12) || this.match(8);

    switch (this.state.type) {
      case 124:
        {
          const literal = this.parseNumericLiteral(this.state.value);

          if (endOfInit()) {
            return {
              type: "number",
              pos: literal.start,
              value: literal
            };
          }

          return {
            type: "invalid",
            pos: startPos
          };
        }

      case 123:
        {
          const literal = this.parseStringLiteral(this.state.value);

          if (endOfInit()) {
            return {
              type: "string",
              pos: literal.start,
              value: literal
            };
          }

          return {
            type: "invalid",
            pos: startPos
          };
        }

      case 79:
      case 80:
        {
          const literal = this.parseBooleanLiteral(this.match(79));

          if (endOfInit()) {
            return {
              type: "boolean",
              pos: literal.start,
              value: literal
            };
          }

          return {
            type: "invalid",
            pos: startPos
          };
        }

      default:
        return {
          type: "invalid",
          pos: startPos
        };
    }
  }

  flowEnumMemberRaw() {
    const pos = this.state.start;
    const id = this.parseIdentifier(true);
    const init = this.eat(27) ? this.flowEnumMemberInit() : {
      type: "none",
      pos
    };
    return {
      id,
      init
    };
  }

  flowEnumCheckExplicitTypeMismatch(pos, context, expectedType) {
    const {
      explicitType
    } = context;

    if (explicitType === null) {
      return;
    }

    if (explicitType !== expectedType) {
      this.flowEnumErrorInvalidMemberInitializer(pos, context);
    }
  }

  flowEnumMembers({
    enumName,
    explicitType
  }) {
    const seenNames = new Set();
    const members = {
      booleanMembers: [],
      numberMembers: [],
      stringMembers: [],
      defaultedMembers: []
    };
    let hasUnknownMembers = false;

    while (!this.match(8)) {
      if (this.eat(21)) {
        hasUnknownMembers = true;
        break;
      }

      const memberNode = this.startNode();
      const {
        id,
        init
      } = this.flowEnumMemberRaw();
      const memberName = id.name;

      if (memberName === "") {
        continue;
      }

      if (/^[a-z]/.test(memberName)) {
        this.flowEnumErrorInvalidMemberName(id.start, {
          enumName,
          memberName
        });
      }

      if (seenNames.has(memberName)) {
        this.flowEnumErrorDuplicateMemberName(id.start, {
          enumName,
          memberName
        });
      }

      seenNames.add(memberName);
      const context = {
        enumName,
        explicitType,
        memberName
      };
      memberNode.id = id;

      switch (init.type) {
        case "boolean":
          {
            this.flowEnumCheckExplicitTypeMismatch(init.pos, context, "boolean");
            memberNode.init = init.value;
            members.booleanMembers.push(this.finishNode(memberNode, "EnumBooleanMember"));
            break;
          }

        case "number":
          {
            this.flowEnumCheckExplicitTypeMismatch(init.pos, context, "number");
            memberNode.init = init.value;
            members.numberMembers.push(this.finishNode(memberNode, "EnumNumberMember"));
            break;
          }

        case "string":
          {
            this.flowEnumCheckExplicitTypeMismatch(init.pos, context, "string");
            memberNode.init = init.value;
            members.stringMembers.push(this.finishNode(memberNode, "EnumStringMember"));
            break;
          }

        case "invalid":
          {
            throw this.flowEnumErrorInvalidMemberInitializer(init.pos, context);
          }

        case "none":
          {
            switch (explicitType) {
              case "boolean":
                this.flowEnumErrorBooleanMemberNotInitialized(init.pos, context);
                break;

              case "number":
                this.flowEnumErrorNumberMemberNotInitialized(init.pos, context);
                break;

              default:
                members.defaultedMembers.push(this.finishNode(memberNode, "EnumDefaultedMember"));
            }
          }
      }

      if (!this.match(8)) {
        this.expect(12);
      }
    }

    return {
      members,
      hasUnknownMembers
    };
  }

  flowEnumStringMembers(initializedMembers, defaultedMembers, {
    enumName
  }) {
    if (initializedMembers.length === 0) {
      return defaultedMembers;
    } else if (defaultedMembers.length === 0) {
      return initializedMembers;
    } else if (defaultedMembers.length > initializedMembers.length) {
      for (const member of initializedMembers) {
        this.flowEnumErrorStringMemberInconsistentlyInitailized(member.start, {
          enumName
        });
      }

      return defaultedMembers;
    } else {
      for (const member of defaultedMembers) {
        this.flowEnumErrorStringMemberInconsistentlyInitailized(member.start, {
          enumName
        });
      }

      return initializedMembers;
    }
  }

  flowEnumParseExplicitType({
    enumName
  }) {
    if (this.eatContextual(95)) {
      if (!tokenIsIdentifier(this.state.type)) {
        throw this.flowEnumErrorInvalidExplicitType(this.state.start, {
          enumName,
          suppliedType: null
        });
      }

      const {
        value
      } = this.state;
      this.next();

      if (value !== "boolean" && value !== "number" && value !== "string" && value !== "symbol") {
        this.flowEnumErrorInvalidExplicitType(this.state.start, {
          enumName,
          suppliedType: value
        });
      }

      return value;
    }

    return null;
  }

  flowEnumBody(node, {
    enumName,
    nameLoc
  }) {
    const explicitType = this.flowEnumParseExplicitType({
      enumName
    });
    this.expect(5);
    const {
      members,
      hasUnknownMembers
    } = this.flowEnumMembers({
      enumName,
      explicitType
    });
    node.hasUnknownMembers = hasUnknownMembers;

    switch (explicitType) {
      case "boolean":
        node.explicitType = true;
        node.members = members.booleanMembers;
        this.expect(8);
        return this.finishNode(node, "EnumBooleanBody");

      case "number":
        node.explicitType = true;
        node.members = members.numberMembers;
        this.expect(8);
        return this.finishNode(node, "EnumNumberBody");

      case "string":
        node.explicitType = true;
        node.members = this.flowEnumStringMembers(members.stringMembers, members.defaultedMembers, {
          enumName
        });
        this.expect(8);
        return this.finishNode(node, "EnumStringBody");

      case "symbol":
        node.members = members.defaultedMembers;
        this.expect(8);
        return this.finishNode(node, "EnumSymbolBody");

      default:
        {
          const empty = () => {
            node.members = [];
            this.expect(8);
            return this.finishNode(node, "EnumStringBody");
          };

          node.explicitType = false;
          const boolsLen = members.booleanMembers.length;
          const numsLen = members.numberMembers.length;
          const strsLen = members.stringMembers.length;
          const defaultedLen = members.defaultedMembers.length;

          if (!boolsLen && !numsLen && !strsLen && !defaultedLen) {
            return empty();
          } else if (!boolsLen && !numsLen) {
            node.members = this.flowEnumStringMembers(members.stringMembers, members.defaultedMembers, {
              enumName
            });
            this.expect(8);
            return this.finishNode(node, "EnumStringBody");
          } else if (!numsLen && !strsLen && boolsLen >= defaultedLen) {
            for (const member of members.defaultedMembers) {
              this.flowEnumErrorBooleanMemberNotInitialized(member.start, {
                enumName,
                memberName: member.id.name
              });
            }

            node.members = members.booleanMembers;
            this.expect(8);
            return this.finishNode(node, "EnumBooleanBody");
          } else if (!boolsLen && !strsLen && numsLen >= defaultedLen) {
            for (const member of members.defaultedMembers) {
              this.flowEnumErrorNumberMemberNotInitialized(member.start, {
                enumName,
                memberName: member.id.name
              });
            }

            node.members = members.numberMembers;
            this.expect(8);
            return this.finishNode(node, "EnumNumberBody");
          } else {
            this.flowEnumErrorInconsistentMemberValues(nameLoc, {
              enumName
            });
            return empty();
          }
        }
    }
  }

  flowParseEnumDeclaration(node) {
    const id = this.parseIdentifier();
    node.id = id;
    node.body = this.flowEnumBody(this.startNode(), {
      enumName: id.name,
      nameLoc: id.start
    });
    return this.finishNode(node, "EnumDeclaration");
  }

  isLookaheadToken_lt() {
    const next = this.nextTokenStart();

    if (this.input.charCodeAt(next) === 60) {
      const afterNext = this.input.charCodeAt(next + 1);
      return afterNext !== 60 && afterNext !== 61;
    }

    return false;
  }

  maybeUnwrapTypeCastExpression(node) {
    return node.type === "TypeCastExpression" ? node.expression : node;
  }

});

const entities = {
  quot: "\u0022",
  amp: "&",
  apos: "\u0027",
  lt: "<",
  gt: ">",
  nbsp: "\u00A0",
  iexcl: "\u00A1",
  cent: "\u00A2",
  pound: "\u00A3",
  curren: "\u00A4",
  yen: "\u00A5",
  brvbar: "\u00A6",
  sect: "\u00A7",
  uml: "\u00A8",
  copy: "\u00A9",
  ordf: "\u00AA",
  laquo: "\u00AB",
  not: "\u00AC",
  shy: "\u00AD",
  reg: "\u00AE",
  macr: "\u00AF",
  deg: "\u00B0",
  plusmn: "\u00B1",
  sup2: "\u00B2",
  sup3: "\u00B3",
  acute: "\u00B4",
  micro: "\u00B5",
  para: "\u00B6",
  middot: "\u00B7",
  cedil: "\u00B8",
  sup1: "\u00B9",
  ordm: "\u00BA",
  raquo: "\u00BB",
  frac14: "\u00BC",
  frac12: "\u00BD",
  frac34: "\u00BE",
  iquest: "\u00BF",
  Agrave: "\u00C0",
  Aacute: "\u00C1",
  Acirc: "\u00C2",
  Atilde: "\u00C3",
  Auml: "\u00C4",
  Aring: "\u00C5",
  AElig: "\u00C6",
  Ccedil: "\u00C7",
  Egrave: "\u00C8",
  Eacute: "\u00C9",
  Ecirc: "\u00CA",
  Euml: "\u00CB",
  Igrave: "\u00CC",
  Iacute: "\u00CD",
  Icirc: "\u00CE",
  Iuml: "\u00CF",
  ETH: "\u00D0",
  Ntilde: "\u00D1",
  Ograve: "\u00D2",
  Oacute: "\u00D3",
  Ocirc: "\u00D4",
  Otilde: "\u00D5",
  Ouml: "\u00D6",
  times: "\u00D7",
  Oslash: "\u00D8",
  Ugrave: "\u00D9",
  Uacute: "\u00DA",
  Ucirc: "\u00DB",
  Uuml: "\u00DC",
  Yacute: "\u00DD",
  THORN: "\u00DE",
  szlig: "\u00DF",
  agrave: "\u00E0",
  aacute: "\u00E1",
  acirc: "\u00E2",
  atilde: "\u00E3",
  auml: "\u00E4",
  aring: "\u00E5",
  aelig: "\u00E6",
  ccedil: "\u00E7",
  egrave: "\u00E8",
  eacute: "\u00E9",
  ecirc: "\u00EA",
  euml: "\u00EB",
  igrave: "\u00EC",
  iacute: "\u00ED",
  icirc: "\u00EE",
  iuml: "\u00EF",
  eth: "\u00F0",
  ntilde: "\u00F1",
  ograve: "\u00F2",
  oacute: "\u00F3",
  ocirc: "\u00F4",
  otilde: "\u00F5",
  ouml: "\u00F6",
  divide: "\u00F7",
  oslash: "\u00F8",
  ugrave: "\u00F9",
  uacute: "\u00FA",
  ucirc: "\u00FB",
  uuml: "\u00FC",
  yacute: "\u00FD",
  thorn: "\u00FE",
  yuml: "\u00FF",
  OElig: "\u0152",
  oelig: "\u0153",
  Scaron: "\u0160",
  scaron: "\u0161",
  Yuml: "\u0178",
  fnof: "\u0192",
  circ: "\u02C6",
  tilde: "\u02DC",
  Alpha: "\u0391",
  Beta: "\u0392",
  Gamma: "\u0393",
  Delta: "\u0394",
  Epsilon: "\u0395",
  Zeta: "\u0396",
  Eta: "\u0397",
  Theta: "\u0398",
  Iota: "\u0399",
  Kappa: "\u039A",
  Lambda: "\u039B",
  Mu: "\u039C",
  Nu: "\u039D",
  Xi: "\u039E",
  Omicron: "\u039F",
  Pi: "\u03A0",
  Rho: "\u03A1",
  Sigma: "\u03A3",
  Tau: "\u03A4",
  Upsilon: "\u03A5",
  Phi: "\u03A6",
  Chi: "\u03A7",
  Psi: "\u03A8",
  Omega: "\u03A9",
  alpha: "\u03B1",
  beta: "\u03B2",
  gamma: "\u03B3",
  delta: "\u03B4",
  epsilon: "\u03B5",
  zeta: "\u03B6",
  eta: "\u03B7",
  theta: "\u03B8",
  iota: "\u03B9",
  kappa: "\u03BA",
  lambda: "\u03BB",
  mu: "\u03BC",
  nu: "\u03BD",
  xi: "\u03BE",
  omicron: "\u03BF",
  pi: "\u03C0",
  rho: "\u03C1",
  sigmaf: "\u03C2",
  sigma: "\u03C3",
  tau: "\u03C4",
  upsilon: "\u03C5",
  phi: "\u03C6",
  chi: "\u03C7",
  psi: "\u03C8",
  omega: "\u03C9",
  thetasym: "\u03D1",
  upsih: "\u03D2",
  piv: "\u03D6",
  ensp: "\u2002",
  emsp: "\u2003",
  thinsp: "\u2009",
  zwnj: "\u200C",
  zwj: "\u200D",
  lrm: "\u200E",
  rlm: "\u200F",
  ndash: "\u2013",
  mdash: "\u2014",
  lsquo: "\u2018",
  rsquo: "\u2019",
  sbquo: "\u201A",
  ldquo: "\u201C",
  rdquo: "\u201D",
  bdquo: "\u201E",
  dagger: "\u2020",
  Dagger: "\u2021",
  bull: "\u2022",
  hellip: "\u2026",
  permil: "\u2030",
  prime: "\u2032",
  Prime: "\u2033",
  lsaquo: "\u2039",
  rsaquo: "\u203A",
  oline: "\u203E",
  frasl: "\u2044",
  euro: "\u20AC",
  image: "\u2111",
  weierp: "\u2118",
  real: "\u211C",
  trade: "\u2122",
  alefsym: "\u2135",
  larr: "\u2190",
  uarr: "\u2191",
  rarr: "\u2192",
  darr: "\u2193",
  harr: "\u2194",
  crarr: "\u21B5",
  lArr: "\u21D0",
  uArr: "\u21D1",
  rArr: "\u21D2",
  dArr: "\u21D3",
  hArr: "\u21D4",
  forall: "\u2200",
  part: "\u2202",
  exist: "\u2203",
  empty: "\u2205",
  nabla: "\u2207",
  isin: "\u2208",
  notin: "\u2209",
  ni: "\u220B",
  prod: "\u220F",
  sum: "\u2211",
  minus: "\u2212",
  lowast: "\u2217",
  radic: "\u221A",
  prop: "\u221D",
  infin: "\u221E",
  ang: "\u2220",
  and: "\u2227",
  or: "\u2228",
  cap: "\u2229",
  cup: "\u222A",
  int: "\u222B",
  there4: "\u2234",
  sim: "\u223C",
  cong: "\u2245",
  asymp: "\u2248",
  ne: "\u2260",
  equiv: "\u2261",
  le: "\u2264",
  ge: "\u2265",
  sub: "\u2282",
  sup: "\u2283",
  nsub: "\u2284",
  sube: "\u2286",
  supe: "\u2287",
  oplus: "\u2295",
  otimes: "\u2297",
  perp: "\u22A5",
  sdot: "\u22C5",
  lceil: "\u2308",
  rceil: "\u2309",
  lfloor: "\u230A",
  rfloor: "\u230B",
  lang: "\u2329",
  rang: "\u232A",
  loz: "\u25CA",
  spades: "\u2660",
  clubs: "\u2663",
  hearts: "\u2665",
  diams: "\u2666"
};

const HEX_NUMBER = /^[\da-fA-F]+$/;
const DECIMAL_NUMBER = /^\d+$/;
const JsxErrors = makeErrorTemplates({
  AttributeIsEmpty: "JSX attributes must only be assigned a non-empty expression.",
  MissingClosingTagElement: "Expected corresponding JSX closing tag for <%0>.",
  MissingClosingTagFragment: "Expected corresponding JSX closing tag for <>.",
  UnexpectedSequenceExpression: "Sequence expressions cannot be directly nested inside JSX. Did you mean to wrap it in parentheses (...)?",
  UnsupportedJsxValue: "JSX value should be either an expression or a quoted JSX text.",
  UnterminatedJsxContent: "Unterminated JSX contents.",
  UnwrappedAdjacentJSXElements: "Adjacent JSX elements must be wrapped in an enclosing tag. Did you want a JSX fragment <>...</>?"
}, ErrorCodes.SyntaxError, "jsx");
types.j_oTag = new TokContext("<tag");
types.j_cTag = new TokContext("</tag");
types.j_expr = new TokContext("<tag>...</tag>", true);

function isFragment(object) {
  return object ? object.type === "JSXOpeningFragment" || object.type === "JSXClosingFragment" : false;
}

function getQualifiedJSXName(object) {
  if (object.type === "JSXIdentifier") {
    return object.name;
  }

  if (object.type === "JSXNamespacedName") {
    return object.namespace.name + ":" + object.name.name;
  }

  if (object.type === "JSXMemberExpression") {
    return getQualifiedJSXName(object.object) + "." + getQualifiedJSXName(object.property);
  }

  throw new Error("Node had unexpected type: " + object.type);
}

var jsx = (superClass => class extends superClass {
  jsxReadToken() {
    let out = "";
    let chunkStart = this.state.pos;

    for (;;) {
      if (this.state.pos >= this.length) {
        throw this.raise(this.state.start, JsxErrors.UnterminatedJsxContent);
      }

      const ch = this.input.charCodeAt(this.state.pos);

      switch (ch) {
        case 60:
        case 123:
          if (this.state.pos === this.state.start) {
            if (ch === 60 && this.state.canStartJSXElement) {
              ++this.state.pos;
              return this.finishToken(132);
            }

            return super.getTokenFromCode(ch);
          }

          out += this.input.slice(chunkStart, this.state.pos);
          return this.finishToken(131, out);

        case 38:
          out += this.input.slice(chunkStart, this.state.pos);
          out += this.jsxReadEntity();
          chunkStart = this.state.pos;
          break;

        case 62:
        case 125:

        default:
          if (isNewLine(ch)) {
            out += this.input.slice(chunkStart, this.state.pos);
            out += this.jsxReadNewLine(true);
            chunkStart = this.state.pos;
          } else {
            ++this.state.pos;
          }

      }
    }
  }

  jsxReadNewLine(normalizeCRLF) {
    const ch = this.input.charCodeAt(this.state.pos);
    let out;
    ++this.state.pos;

    if (ch === 13 && this.input.charCodeAt(this.state.pos) === 10) {
      ++this.state.pos;
      out = normalizeCRLF ? "\n" : "\r\n";
    } else {
      out = String.fromCharCode(ch);
    }

    ++this.state.curLine;
    this.state.lineStart = this.state.pos;
    return out;
  }

  jsxReadString(quote) {
    let out = "";
    let chunkStart = ++this.state.pos;

    for (;;) {
      if (this.state.pos >= this.length) {
        throw this.raise(this.state.start, ErrorMessages.UnterminatedString);
      }

      const ch = this.input.charCodeAt(this.state.pos);
      if (ch === quote) break;

      if (ch === 38) {
        out += this.input.slice(chunkStart, this.state.pos);
        out += this.jsxReadEntity();
        chunkStart = this.state.pos;
      } else if (isNewLine(ch)) {
        out += this.input.slice(chunkStart, this.state.pos);
        out += this.jsxReadNewLine(false);
        chunkStart = this.state.pos;
      } else {
        ++this.state.pos;
      }
    }

    out += this.input.slice(chunkStart, this.state.pos++);
    return this.finishToken(123, out);
  }

  jsxReadEntity() {
    let str = "";
    let count = 0;
    let entity;
    let ch = this.input[this.state.pos];
    const startPos = ++this.state.pos;

    while (this.state.pos < this.length && count++ < 10) {
      ch = this.input[this.state.pos++];

      if (ch === ";") {
        if (str[0] === "#") {
          if (str[1] === "x") {
            str = str.substr(2);

            if (HEX_NUMBER.test(str)) {
              entity = String.fromCodePoint(parseInt(str, 16));
            }
          } else {
            str = str.substr(1);

            if (DECIMAL_NUMBER.test(str)) {
              entity = String.fromCodePoint(parseInt(str, 10));
            }
          }
        } else {
          entity = entities[str];
        }

        break;
      }

      str += ch;
    }

    if (!entity) {
      this.state.pos = startPos;
      return "&";
    }

    return entity;
  }

  jsxReadWord() {
    let ch;
    const start = this.state.pos;

    do {
      ch = this.input.charCodeAt(++this.state.pos);
    } while (isIdentifierChar(ch) || ch === 45);

    return this.finishToken(130, this.input.slice(start, this.state.pos));
  }

  jsxParseIdentifier() {
    const node = this.startNode();

    if (this.match(130)) {
      node.name = this.state.value;
    } else if (tokenIsKeyword(this.state.type)) {
      node.name = tokenLabelName(this.state.type);
    } else {
      this.unexpected();
    }

    this.next();
    return this.finishNode(node, "JSXIdentifier");
  }

  jsxParseNamespacedName() {
    const startPos = this.state.start;
    const startLoc = this.state.startLoc;
    const name = this.jsxParseIdentifier();
    if (!this.eat(14)) return name;
    const node = this.startNodeAt(startPos, startLoc);
    node.namespace = name;
    node.name = this.jsxParseIdentifier();
    return this.finishNode(node, "JSXNamespacedName");
  }

  jsxParseElementName() {
    const startPos = this.state.start;
    const startLoc = this.state.startLoc;
    let node = this.jsxParseNamespacedName();

    if (node.type === "JSXNamespacedName") {
      return node;
    }

    while (this.eat(16)) {
      const newNode = this.startNodeAt(startPos, startLoc);
      newNode.object = node;
      newNode.property = this.jsxParseIdentifier();
      node = this.finishNode(newNode, "JSXMemberExpression");
    }

    return node;
  }

  jsxParseAttributeValue() {
    let node;

    switch (this.state.type) {
      case 5:
        node = this.startNode();
        this.next();
        node = this.jsxParseExpressionContainer(node);

        if (node.expression.type === "JSXEmptyExpression") {
          this.raise(node.start, JsxErrors.AttributeIsEmpty);
        }

        return node;

      case 132:
      case 123:
        return this.parseExprAtom();

      default:
        throw this.raise(this.state.start, JsxErrors.UnsupportedJsxValue);
    }
  }

  jsxParseEmptyExpression() {
    const node = this.startNodeAt(this.state.lastTokEnd, this.state.lastTokEndLoc);
    return this.finishNodeAt(node, "JSXEmptyExpression", this.state.start, this.state.startLoc);
  }

  jsxParseSpreadChild(node) {
    this.next();
    node.expression = this.parseExpression();
    this.expect(8);
    return this.finishNode(node, "JSXSpreadChild");
  }

  jsxParseExpressionContainer(node) {
    if (this.match(8)) {
      node.expression = this.jsxParseEmptyExpression();
    } else {
      const expression = this.parseExpression();
      node.expression = expression;
    }

    this.expect(8);
    return this.finishNode(node, "JSXExpressionContainer");
  }

  jsxParseAttribute() {
    const node = this.startNode();

    if (this.eat(5)) {
      this.expect(21);
      node.argument = this.parseMaybeAssignAllowIn();
      this.expect(8);
      return this.finishNode(node, "JSXSpreadAttribute");
    }

    node.name = this.jsxParseNamespacedName();
    node.value = this.eat(27) ? this.jsxParseAttributeValue() : null;
    return this.finishNode(node, "JSXAttribute");
  }

  jsxParseOpeningElementAt(startPos, startLoc) {
    const node = this.startNodeAt(startPos, startLoc);

    if (this.match(133)) {
      this.expect(133);
      return this.finishNode(node, "JSXOpeningFragment");
    }

    node.name = this.jsxParseElementName();
    return this.jsxParseOpeningElementAfterName(node);
  }

  jsxParseOpeningElementAfterName(node) {
    const attributes = [];

    while (!this.match(50) && !this.match(133)) {
      attributes.push(this.jsxParseAttribute());
    }

    node.attributes = attributes;
    node.selfClosing = this.eat(50);
    this.expect(133);
    return this.finishNode(node, "JSXOpeningElement");
  }

  jsxParseClosingElementAt(startPos, startLoc) {
    const node = this.startNodeAt(startPos, startLoc);

    if (this.match(133)) {
      this.expect(133);
      return this.finishNode(node, "JSXClosingFragment");
    }

    node.name = this.jsxParseElementName();
    this.expect(133);
    return this.finishNode(node, "JSXClosingElement");
  }

  jsxParseElementAt(startPos, startLoc) {
    const node = this.startNodeAt(startPos, startLoc);
    const children = [];
    const openingElement = this.jsxParseOpeningElementAt(startPos, startLoc);
    let closingElement = null;

    if (!openingElement.selfClosing) {
      contents: for (;;) {
        switch (this.state.type) {
          case 132:
            startPos = this.state.start;
            startLoc = this.state.startLoc;
            this.next();

            if (this.eat(50)) {
              closingElement = this.jsxParseClosingElementAt(startPos, startLoc);
              break contents;
            }

            children.push(this.jsxParseElementAt(startPos, startLoc));
            break;

          case 131:
            children.push(this.parseExprAtom());
            break;

          case 5:
            {
              const node = this.startNode();
              this.next();

              if (this.match(21)) {
                children.push(this.jsxParseSpreadChild(node));
              } else {
                children.push(this.jsxParseExpressionContainer(node));
              }

              break;
            }

          default:
            throw this.unexpected();
        }
      }

      if (isFragment(openingElement) && !isFragment(closingElement)) {
        this.raise(closingElement.start, JsxErrors.MissingClosingTagFragment);
      } else if (!isFragment(openingElement) && isFragment(closingElement)) {
        this.raise(closingElement.start, JsxErrors.MissingClosingTagElement, getQualifiedJSXName(openingElement.name));
      } else if (!isFragment(openingElement) && !isFragment(closingElement)) {
        if (getQualifiedJSXName(closingElement.name) !== getQualifiedJSXName(openingElement.name)) {
          this.raise(closingElement.start, JsxErrors.MissingClosingTagElement, getQualifiedJSXName(openingElement.name));
        }
      }
    }

    if (isFragment(openingElement)) {
      node.openingFragment = openingElement;
      node.closingFragment = closingElement;
    } else {
      node.openingElement = openingElement;
      node.closingElement = closingElement;
    }

    node.children = children;

    if (this.match(43)) {
      throw this.raise(this.state.start, JsxErrors.UnwrappedAdjacentJSXElements);
    }

    return isFragment(openingElement) ? this.finishNode(node, "JSXFragment") : this.finishNode(node, "JSXElement");
  }

  jsxParseElement() {
    const startPos = this.state.start;
    const startLoc = this.state.startLoc;
    this.next();
    return this.jsxParseElementAt(startPos, startLoc);
  }

  parseExprAtom(refExpressionErrors) {
    if (this.match(131)) {
      return this.parseLiteral(this.state.value, "JSXText");
    } else if (this.match(132)) {
      return this.jsxParseElement();
    } else if (this.match(43) && this.input.charCodeAt(this.state.pos) !== 33) {
      this.replaceToken(132);
      return this.jsxParseElement();
    } else {
      return super.parseExprAtom(refExpressionErrors);
    }
  }

  getTokenFromCode(code) {
    const context = this.curContext();

    if (context === types.j_expr) {
      return this.jsxReadToken();
    }

    if (context === types.j_oTag || context === types.j_cTag) {
      if (isIdentifierStart(code)) {
        return this.jsxReadWord();
      }

      if (code === 62) {
        ++this.state.pos;
        return this.finishToken(133);
      }

      if ((code === 34 || code === 39) && context === types.j_oTag) {
        return this.jsxReadString(code);
      }
    }

    if (code === 60 && this.state.canStartJSXElement && this.input.charCodeAt(this.state.pos + 1) !== 33) {
      ++this.state.pos;
      return this.finishToken(132);
    }

    return super.getTokenFromCode(code);
  }

  updateContext(prevType) {
    super.updateContext(prevType);
    const {
      context,
      type
    } = this.state;

    if (type === 50 && prevType === 132) {
      context.splice(-2, 2, types.j_cTag);
      this.state.canStartJSXElement = false;
    } else if (type === 132) {
      context.push(types.j_expr, types.j_oTag);
    } else if (type === 133) {
      const out = context.pop();

      if (out === types.j_oTag && prevType === 50 || out === types.j_cTag) {
        context.pop();
        this.state.canStartJSXElement = context[context.length - 1] === types.j_expr;
      } else {
        this.state.canStartJSXElement = true;
      }
    } else {
      this.state.canStartJSXElement = tokenComesBeforeExpression(type);
    }
  }

});

class TypeScriptScope extends Scope {
  constructor(...args) {
    super(...args);
    this.types = new Set();
    this.enums = new Set();
    this.constEnums = new Set();
    this.classes = new Set();
    this.exportOnlyBindings = new Set();
  }

}

class TypeScriptScopeHandler extends ScopeHandler {
  createScope(flags) {
    return new TypeScriptScope(flags);
  }

  declareName(name, bindingType, pos) {
    const scope = this.currentScope();

    if (bindingType & BIND_FLAGS_TS_EXPORT_ONLY) {
      this.maybeExportDefined(scope, name);
      scope.exportOnlyBindings.add(name);
      return;
    }

    super.declareName(...arguments);

    if (bindingType & BIND_KIND_TYPE) {
      if (!(bindingType & BIND_KIND_VALUE)) {
        this.checkRedeclarationInScope(scope, name, bindingType, pos);
        this.maybeExportDefined(scope, name);
      }

      scope.types.add(name);
    }

    if (bindingType & BIND_FLAGS_TS_ENUM) scope.enums.add(name);
    if (bindingType & BIND_FLAGS_TS_CONST_ENUM) scope.constEnums.add(name);
    if (bindingType & BIND_FLAGS_CLASS) scope.classes.add(name);
  }

  isRedeclaredInScope(scope, name, bindingType) {
    if (scope.enums.has(name)) {
      if (bindingType & BIND_FLAGS_TS_ENUM) {
        const isConst = !!(bindingType & BIND_FLAGS_TS_CONST_ENUM);
        const wasConst = scope.constEnums.has(name);
        return isConst !== wasConst;
      }

      return true;
    }

    if (bindingType & BIND_FLAGS_CLASS && scope.classes.has(name)) {
      if (scope.lexical.has(name)) {
        return !!(bindingType & BIND_KIND_VALUE);
      } else {
        return false;
      }
    }

    if (bindingType & BIND_KIND_TYPE && scope.types.has(name)) {
      return true;
    }

    return super.isRedeclaredInScope(...arguments);
  }

  checkLocalExport(id) {
    const topLevelScope = this.scopeStack[0];
    const {
      name
    } = id;

    if (!topLevelScope.types.has(name) && !topLevelScope.exportOnlyBindings.has(name)) {
      super.checkLocalExport(id);
    }
  }

}

function nonNull(x) {
  if (x == null) {
    throw new Error(`Unexpected ${x} value.`);
  }

  return x;
}

function assert(x) {
  if (!x) {
    throw new Error("Assert fail");
  }
}

const TSErrors = makeErrorTemplates({
  AbstractMethodHasImplementation: "Method '%0' cannot have an implementation because it is marked abstract.",
  AbstractPropertyHasInitializer: "Property '%0' cannot have an initializer because it is marked abstract.",
  AccesorCannotDeclareThisParameter: "'get' and 'set' accessors cannot declare 'this' parameters.",
  AccesorCannotHaveTypeParameters: "An accessor cannot have type parameters.",
  ClassMethodHasDeclare: "Class methods cannot have the 'declare' modifier.",
  ClassMethodHasReadonly: "Class methods cannot have the 'readonly' modifier.",
  ConstructorHasTypeParameters: "Type parameters cannot appear on a constructor declaration.",
  DeclareAccessor: "'declare' is not allowed in %0ters.",
  DeclareClassFieldHasInitializer: "Initializers are not allowed in ambient contexts.",
  DeclareFunctionHasImplementation: "An implementation cannot be declared in ambient contexts.",
  DuplicateAccessibilityModifier: "Accessibility modifier already seen.",
  DuplicateModifier: "Duplicate modifier: '%0'.",
  EmptyHeritageClauseType: "'%0' list cannot be empty.",
  EmptyTypeArguments: "Type argument list cannot be empty.",
  EmptyTypeParameters: "Type parameter list cannot be empty.",
  ExpectedAmbientAfterExportDeclare: "'export declare' must be followed by an ambient declaration.",
  ImportAliasHasImportType: "An import alias can not use 'import type'.",
  IncompatibleModifiers: "'%0' modifier cannot be used with '%1' modifier.",
  IndexSignatureHasAbstract: "Index signatures cannot have the 'abstract' modifier.",
  IndexSignatureHasAccessibility: "Index signatures cannot have an accessibility modifier ('%0').",
  IndexSignatureHasDeclare: "Index signatures cannot have the 'declare' modifier.",
  IndexSignatureHasOverride: "'override' modifier cannot appear on an index signature.",
  IndexSignatureHasStatic: "Index signatures cannot have the 'static' modifier.",
  InvalidModifierOnTypeMember: "'%0' modifier cannot appear on a type member.",
  InvalidModifiersOrder: "'%0' modifier must precede '%1' modifier.",
  InvalidTupleMemberLabel: "Tuple members must be labeled with a simple identifier.",
  MissingInterfaceName: "'interface' declarations must be followed by an identifier.",
  MixedLabeledAndUnlabeledElements: "Tuple members must all have names or all not have names.",
  NonAbstractClassHasAbstractMethod: "Abstract methods can only appear within an abstract class.",
  NonClassMethodPropertyHasAbstractModifer: "'abstract' modifier can only appear on a class, method, or property declaration.",
  OptionalTypeBeforeRequired: "A required element cannot follow an optional element.",
  OverrideNotInSubClass: "This member cannot have an 'override' modifier because its containing class does not extend another class.",
  PatternIsOptional: "A binding pattern parameter cannot be optional in an implementation signature.",
  PrivateElementHasAbstract: "Private elements cannot have the 'abstract' modifier.",
  PrivateElementHasAccessibility: "Private elements cannot have an accessibility modifier ('%0').",
  ReadonlyForMethodSignature: "'readonly' modifier can only appear on a property declaration or index signature.",
  ReservedArrowTypeParam: "This syntax is reserved in files with the .mts or .cts extension. Add a trailing comma, as in `<T,>() => ...`.",
  ReservedTypeAssertion: "This syntax is reserved in files with the .mts or .cts extension. Use an `as` expression instead.",
  SetAccesorCannotHaveOptionalParameter: "A 'set' accessor cannot have an optional parameter.",
  SetAccesorCannotHaveRestParameter: "A 'set' accessor cannot have rest parameter.",
  SetAccesorCannotHaveReturnType: "A 'set' accessor cannot have a return type annotation.",
  StaticBlockCannotHaveModifier: "Static class blocks cannot have any modifier.",
  TypeAnnotationAfterAssign: "Type annotations must come before default assignments, e.g. instead of `age = 25: number` use `age: number = 25`.",
  TypeImportCannotSpecifyDefaultAndNamed: "A type-only import can specify a default import or named bindings, but not both.",
  TypeModifierIsUsedInTypeExports: "The 'type' modifier cannot be used on a named export when 'export type' is used on its export statement.",
  TypeModifierIsUsedInTypeImports: "The 'type' modifier cannot be used on a named import when 'import type' is used on its import statement.",
  UnexpectedParameterModifier: "A parameter property is only allowed in a constructor implementation.",
  UnexpectedReadonly: "'readonly' type modifier is only permitted on array and tuple literal types.",
  UnexpectedTypeAnnotation: "Did not expect a type annotation here.",
  UnexpectedTypeCastInParameter: "Unexpected type cast in parameter position.",
  UnsupportedImportTypeArgument: "Argument in a type import must be a string literal.",
  UnsupportedParameterPropertyKind: "A parameter property may not be declared using a binding pattern.",
  UnsupportedSignatureParameterKind: "Name in a signature must be an Identifier, ObjectPattern or ArrayPattern, instead got %0."
}, ErrorCodes.SyntaxError, "typescript");

function keywordTypeFromName(value) {
  switch (value) {
    case "any":
      return "TSAnyKeyword";

    case "boolean":
      return "TSBooleanKeyword";

    case "bigint":
      return "TSBigIntKeyword";

    case "never":
      return "TSNeverKeyword";

    case "number":
      return "TSNumberKeyword";

    case "object":
      return "TSObjectKeyword";

    case "string":
      return "TSStringKeyword";

    case "symbol":
      return "TSSymbolKeyword";

    case "undefined":
      return "TSUndefinedKeyword";

    case "unknown":
      return "TSUnknownKeyword";

    default:
      return undefined;
  }
}

function tsIsAccessModifier(modifier) {
  return modifier === "private" || modifier === "public" || modifier === "protected";
}

var typescript = (superClass => class extends superClass {
  getScopeHandler() {
    return TypeScriptScopeHandler;
  }

  tsIsIdentifier() {
    return tokenIsIdentifier(this.state.type);
  }

  tsTokenCanFollowModifier() {
    return (this.match(0) || this.match(5) || this.match(49) || this.match(21) || this.match(128) || this.isLiteralPropertyName()) && !this.hasPrecedingLineBreak();
  }

  tsNextTokenCanFollowModifier() {
    this.next();
    return this.tsTokenCanFollowModifier();
  }

  tsParseModifier(allowedModifiers, stopOnStartOfClassStaticBlock) {
    if (!tokenIsIdentifier(this.state.type)) {
      return undefined;
    }

    const modifier = this.state.value;

    if (allowedModifiers.indexOf(modifier) !== -1) {
      if (stopOnStartOfClassStaticBlock && this.tsIsStartOfStaticBlocks()) {
        return undefined;
      }

      if (this.tsTryParse(this.tsNextTokenCanFollowModifier.bind(this))) {
        return modifier;
      }
    }

    return undefined;
  }

  tsParseModifiers(modified, allowedModifiers, disallowedModifiers, errorTemplate, stopOnStartOfClassStaticBlock) {
    const enforceOrder = (pos, modifier, before, after) => {
      if (modifier === before && modified[after]) {
        this.raise(pos, TSErrors.InvalidModifiersOrder, before, after);
      }
    };

    const incompatible = (pos, modifier, mod1, mod2) => {
      if (modified[mod1] && modifier === mod2 || modified[mod2] && modifier === mod1) {
        this.raise(pos, TSErrors.IncompatibleModifiers, mod1, mod2);
      }
    };

    for (;;) {
      const startPos = this.state.start;
      const modifier = this.tsParseModifier(allowedModifiers.concat(disallowedModifiers != null ? disallowedModifiers : []), stopOnStartOfClassStaticBlock);
      if (!modifier) break;

      if (tsIsAccessModifier(modifier)) {
        if (modified.accessibility) {
          this.raise(startPos, TSErrors.DuplicateAccessibilityModifier);
        } else {
          enforceOrder(startPos, modifier, modifier, "override");
          enforceOrder(startPos, modifier, modifier, "static");
          enforceOrder(startPos, modifier, modifier, "readonly");
          modified.accessibility = modifier;
        }
      } else {
        if (Object.hasOwnProperty.call(modified, modifier)) {
          this.raise(startPos, TSErrors.DuplicateModifier, modifier);
        } else {
          enforceOrder(startPos, modifier, "static", "readonly");
          enforceOrder(startPos, modifier, "static", "override");
          enforceOrder(startPos, modifier, "override", "readonly");
          enforceOrder(startPos, modifier, "abstract", "override");
          incompatible(startPos, modifier, "declare", "override");
          incompatible(startPos, modifier, "static", "abstract");
        }

        modified[modifier] = true;
      }

      if (disallowedModifiers != null && disallowedModifiers.includes(modifier)) {
        this.raise(startPos, errorTemplate, modifier);
      }
    }
  }

  tsIsListTerminator(kind) {
    switch (kind) {
      case "EnumMembers":
      case "TypeMembers":
        return this.match(8);

      case "HeritageClauseElement":
        return this.match(5);

      case "TupleElementTypes":
        return this.match(3);

      case "TypeParametersOrArguments":
        return this.match(44);
    }

    throw new Error("Unreachable");
  }

  tsParseList(kind, parseElement) {
    const result = [];

    while (!this.tsIsListTerminator(kind)) {
      result.push(parseElement());
    }

    return result;
  }

  tsParseDelimitedList(kind, parseElement, refTrailingCommaPos) {
    return nonNull(this.tsParseDelimitedListWorker(kind, parseElement, true, refTrailingCommaPos));
  }

  tsParseDelimitedListWorker(kind, parseElement, expectSuccess, refTrailingCommaPos) {
    const result = [];
    let trailingCommaPos = -1;

    for (;;) {
      if (this.tsIsListTerminator(kind)) {
        break;
      }

      trailingCommaPos = -1;
      const element = parseElement();

      if (element == null) {
        return undefined;
      }

      result.push(element);

      if (this.eat(12)) {
        trailingCommaPos = this.state.lastTokStart;
        continue;
      }

      if (this.tsIsListTerminator(kind)) {
        break;
      }

      if (expectSuccess) {
        this.expect(12);
      }

      return undefined;
    }

    if (refTrailingCommaPos) {
      refTrailingCommaPos.value = trailingCommaPos;
    }

    return result;
  }

  tsParseBracketedList(kind, parseElement, bracket, skipFirstToken, refTrailingCommaPos) {
    if (!skipFirstToken) {
      if (bracket) {
        this.expect(0);
      } else {
        this.expect(43);
      }
    }

    const result = this.tsParseDelimitedList(kind, parseElement, refTrailingCommaPos);

    if (bracket) {
      this.expect(3);
    } else {
      this.expect(44);
    }

    return result;
  }

  tsParseImportType() {
    const node = this.startNode();
    this.expect(77);
    this.expect(10);

    if (!this.match(123)) {
      this.raise(this.state.start, TSErrors.UnsupportedImportTypeArgument);
    }

    node.argument = this.parseExprAtom();
    this.expect(11);

    if (this.eat(16)) {
      node.qualifier = this.tsParseEntityName(true);
    }

    if (this.match(43)) {
      node.typeParameters = this.tsParseTypeArguments();
    }

    return this.finishNode(node, "TSImportType");
  }

  tsParseEntityName(allowReservedWords) {
    let entity = this.parseIdentifier();

    while (this.eat(16)) {
      const node = this.startNodeAtNode(entity);
      node.left = entity;
      node.right = this.parseIdentifier(allowReservedWords);
      entity = this.finishNode(node, "TSQualifiedName");
    }

    return entity;
  }

  tsParseTypeReference() {
    const node = this.startNode();
    node.typeName = this.tsParseEntityName(false);

    if (!this.hasPrecedingLineBreak() && this.match(43)) {
      node.typeParameters = this.tsParseTypeArguments();
    }

    return this.finishNode(node, "TSTypeReference");
  }

  tsParseThisTypePredicate(lhs) {
    this.next();
    const node = this.startNodeAtNode(lhs);
    node.parameterName = lhs;
    node.typeAnnotation = this.tsParseTypeAnnotation(false);
    node.asserts = false;
    return this.finishNode(node, "TSTypePredicate");
  }

  tsParseThisTypeNode() {
    const node = this.startNode();
    this.next();
    return this.finishNode(node, "TSThisType");
  }

  tsParseTypeQuery() {
    const node = this.startNode();
    this.expect(81);

    if (this.match(77)) {
      node.exprName = this.tsParseImportType();
    } else {
      node.exprName = this.tsParseEntityName(true);
    }

    return this.finishNode(node, "TSTypeQuery");
  }

  tsParseTypeParameter() {
    const node = this.startNode();
    node.name = this.tsParseTypeParameterName();
    node.constraint = this.tsEatThenParseType(75);
    node.default = this.tsEatThenParseType(27);
    return this.finishNode(node, "TSTypeParameter");
  }

  tsTryParseTypeParameters() {
    if (this.match(43)) {
      return this.tsParseTypeParameters();
    }
  }

  tsParseTypeParameters() {
    const node = this.startNode();

    if (this.match(43) || this.match(132)) {
      this.next();
    } else {
      this.unexpected();
    }

    const refTrailingCommaPos = {
      value: -1
    };
    node.params = this.tsParseBracketedList("TypeParametersOrArguments", this.tsParseTypeParameter.bind(this), false, true, refTrailingCommaPos);

    if (node.params.length === 0) {
      this.raise(node.start, TSErrors.EmptyTypeParameters);
    }

    if (refTrailingCommaPos.value !== -1) {
      this.addExtra(node, "trailingComma", refTrailingCommaPos.value);
    }

    return this.finishNode(node, "TSTypeParameterDeclaration");
  }

  tsTryNextParseConstantContext() {
    if (this.lookahead().type === 69) {
      this.next();
      return this.tsParseTypeReference();
    }

    return null;
  }

  tsFillSignature(returnToken, signature) {
    const returnTokenRequired = returnToken === 19;
    signature.typeParameters = this.tsTryParseTypeParameters();
    this.expect(10);
    signature.parameters = this.tsParseBindingListForSignature();

    if (returnTokenRequired) {
      signature.typeAnnotation = this.tsParseTypeOrTypePredicateAnnotation(returnToken);
    } else if (this.match(returnToken)) {
      signature.typeAnnotation = this.tsParseTypeOrTypePredicateAnnotation(returnToken);
    }
  }

  tsParseBindingListForSignature() {
    return this.parseBindingList(11, 41).map(pattern => {
      if (pattern.type !== "Identifier" && pattern.type !== "RestElement" && pattern.type !== "ObjectPattern" && pattern.type !== "ArrayPattern") {
        this.raise(pattern.start, TSErrors.UnsupportedSignatureParameterKind, pattern.type);
      }

      return pattern;
    });
  }

  tsParseTypeMemberSemicolon() {
    if (!this.eat(12) && !this.isLineTerminator()) {
      this.expect(13);
    }
  }

  tsParseSignatureMember(kind, node) {
    this.tsFillSignature(14, node);
    this.tsParseTypeMemberSemicolon();
    return this.finishNode(node, kind);
  }

  tsIsUnambiguouslyIndexSignature() {
    this.next();

    if (tokenIsIdentifier(this.state.type)) {
      this.next();
      return this.match(14);
    }

    return false;
  }

  tsTryParseIndexSignature(node) {
    if (!(this.match(0) && this.tsLookAhead(this.tsIsUnambiguouslyIndexSignature.bind(this)))) {
      return undefined;
    }

    this.expect(0);
    const id = this.parseIdentifier();
    id.typeAnnotation = this.tsParseTypeAnnotation();
    this.resetEndLocation(id);
    this.expect(3);
    node.parameters = [id];
    const type = this.tsTryParseTypeAnnotation();
    if (type) node.typeAnnotation = type;
    this.tsParseTypeMemberSemicolon();
    return this.finishNode(node, "TSIndexSignature");
  }

  tsParsePropertyOrMethodSignature(node, readonly) {
    if (this.eat(17)) node.optional = true;
    const nodeAny = node;

    if (this.match(10) || this.match(43)) {
      if (readonly) {
        this.raise(node.start, TSErrors.ReadonlyForMethodSignature);
      }

      const method = nodeAny;

      if (method.kind && this.match(43)) {
        this.raise(this.state.pos, TSErrors.AccesorCannotHaveTypeParameters);
      }

      this.tsFillSignature(14, method);
      this.tsParseTypeMemberSemicolon();

      if (method.kind === "get") {
        if (method.parameters.length > 0) {
          this.raise(this.state.pos, ErrorMessages.BadGetterArity);

          if (this.isThisParam(method.parameters[0])) {
            this.raise(this.state.pos, TSErrors.AccesorCannotDeclareThisParameter);
          }
        }
      } else if (method.kind === "set") {
        if (method.parameters.length !== 1) {
          this.raise(this.state.pos, ErrorMessages.BadSetterArity);
        } else {
          const firstParameter = method.parameters[0];

          if (this.isThisParam(firstParameter)) {
            this.raise(this.state.pos, TSErrors.AccesorCannotDeclareThisParameter);
          }

          if (firstParameter.type === "Identifier" && firstParameter.optional) {
            this.raise(this.state.pos, TSErrors.SetAccesorCannotHaveOptionalParameter);
          }

          if (firstParameter.type === "RestElement") {
            this.raise(this.state.pos, TSErrors.SetAccesorCannotHaveRestParameter);
          }
        }

        if (method.typeAnnotation) {
          this.raise(method.typeAnnotation.start, TSErrors.SetAccesorCannotHaveReturnType);
        }
      } else {
        method.kind = "method";
      }

      return this.finishNode(method, "TSMethodSignature");
    } else {
      const property = nodeAny;
      if (readonly) property.readonly = true;
      const type = this.tsTryParseTypeAnnotation();
      if (type) property.typeAnnotation = type;
      this.tsParseTypeMemberSemicolon();
      return this.finishNode(property, "TSPropertySignature");
    }
  }

  tsParseTypeMember() {
    const node = this.startNode();

    if (this.match(10) || this.match(43)) {
      return this.tsParseSignatureMember("TSCallSignatureDeclaration", node);
    }

    if (this.match(71)) {
      const id = this.startNode();
      this.next();

      if (this.match(10) || this.match(43)) {
        return this.tsParseSignatureMember("TSConstructSignatureDeclaration", node);
      } else {
        node.key = this.createIdentifier(id, "new");
        return this.tsParsePropertyOrMethodSignature(node, false);
      }
    }

    this.tsParseModifiers(node, ["readonly"], ["declare", "abstract", "private", "protected", "public", "static", "override"], TSErrors.InvalidModifierOnTypeMember);
    const idx = this.tsTryParseIndexSignature(node);

    if (idx) {
      return idx;
    }

    this.parsePropertyName(node);

    if (!node.computed && node.key.type === "Identifier" && (node.key.name === "get" || node.key.name === "set") && this.tsTokenCanFollowModifier()) {
      node.kind = node.key.name;
      this.parsePropertyName(node);
    }

    return this.tsParsePropertyOrMethodSignature(node, !!node.readonly);
  }

  tsParseTypeLiteral() {
    const node = this.startNode();
    node.members = this.tsParseObjectTypeMembers();
    return this.finishNode(node, "TSTypeLiteral");
  }

  tsParseObjectTypeMembers() {
    this.expect(5);
    const members = this.tsParseList("TypeMembers", this.tsParseTypeMember.bind(this));
    this.expect(8);
    return members;
  }

  tsIsStartOfMappedType() {
    this.next();

    if (this.eat(47)) {
      return this.isContextual(112);
    }

    if (this.isContextual(112)) {
      this.next();
    }

    if (!this.match(0)) {
      return false;
    }

    this.next();

    if (!this.tsIsIdentifier()) {
      return false;
    }

    this.next();
    return this.match(52);
  }

  tsParseMappedTypeParameter() {
    const node = this.startNode();
    node.name = this.tsParseTypeParameterName();
    node.constraint = this.tsExpectThenParseType(52);
    return this.finishNode(node, "TSTypeParameter");
  }

  tsParseMappedType() {
    const node = this.startNode();
    this.expect(5);

    if (this.match(47)) {
      node.readonly = this.state.value;
      this.next();
      this.expectContextual(112);
    } else if (this.eatContextual(112)) {
      node.readonly = true;
    }

    this.expect(0);
    node.typeParameter = this.tsParseMappedTypeParameter();
    node.nameType = this.eatContextual(87) ? this.tsParseType() : null;
    this.expect(3);

    if (this.match(47)) {
      node.optional = this.state.value;
      this.next();
      this.expect(17);
    } else if (this.eat(17)) {
      node.optional = true;
    }

    node.typeAnnotation = this.tsTryParseType();
    this.semicolon();
    this.expect(8);
    return this.finishNode(node, "TSMappedType");
  }

  tsParseTupleType() {
    const node = this.startNode();
    node.elementTypes = this.tsParseBracketedList("TupleElementTypes", this.tsParseTupleElementType.bind(this), true, false);
    let seenOptionalElement = false;
    let labeledElements = null;
    node.elementTypes.forEach(elementNode => {
      var _labeledElements;

      let {
        type
      } = elementNode;

      if (seenOptionalElement && type !== "TSRestType" && type !== "TSOptionalType" && !(type === "TSNamedTupleMember" && elementNode.optional)) {
        this.raise(elementNode.start, TSErrors.OptionalTypeBeforeRequired);
      }

      seenOptionalElement = seenOptionalElement || type === "TSNamedTupleMember" && elementNode.optional || type === "TSOptionalType";

      if (type === "TSRestType") {
        elementNode = elementNode.typeAnnotation;
        type = elementNode.type;
      }

      const isLabeled = type === "TSNamedTupleMember";
      labeledElements = (_labeledElements = labeledElements) != null ? _labeledElements : isLabeled;

      if (labeledElements !== isLabeled) {
        this.raise(elementNode.start, TSErrors.MixedLabeledAndUnlabeledElements);
      }
    });
    return this.finishNode(node, "TSTupleType");
  }

  tsParseTupleElementType() {
    const {
      start: startPos,
      startLoc
    } = this.state;
    const rest = this.eat(21);
    let type = this.tsParseType();
    const optional = this.eat(17);
    const labeled = this.eat(14);

    if (labeled) {
      const labeledNode = this.startNodeAtNode(type);
      labeledNode.optional = optional;

      if (type.type === "TSTypeReference" && !type.typeParameters && type.typeName.type === "Identifier") {
        labeledNode.label = type.typeName;
      } else {
        this.raise(type.start, TSErrors.InvalidTupleMemberLabel);
        labeledNode.label = type;
      }

      labeledNode.elementType = this.tsParseType();
      type = this.finishNode(labeledNode, "TSNamedTupleMember");
    } else if (optional) {
      const optionalTypeNode = this.startNodeAtNode(type);
      optionalTypeNode.typeAnnotation = type;
      type = this.finishNode(optionalTypeNode, "TSOptionalType");
    }

    if (rest) {
      const restNode = this.startNodeAt(startPos, startLoc);
      restNode.typeAnnotation = type;
      type = this.finishNode(restNode, "TSRestType");
    }

    return type;
  }

  tsParseParenthesizedType() {
    const node = this.startNode();
    this.expect(10);
    node.typeAnnotation = this.tsParseType();
    this.expect(11);
    return this.finishNode(node, "TSParenthesizedType");
  }

  tsParseFunctionOrConstructorType(type, abstract) {
    const node = this.startNode();

    if (type === "TSConstructorType") {
      node.abstract = !!abstract;
      if (abstract) this.next();
      this.next();
    }

    this.tsFillSignature(19, node);
    return this.finishNode(node, type);
  }

  tsParseLiteralTypeNode() {
    const node = this.startNode();

    node.literal = (() => {
      switch (this.state.type) {
        case 124:
        case 125:
        case 123:
        case 79:
        case 80:
          return this.parseExprAtom();

        default:
          throw this.unexpected();
      }
    })();

    return this.finishNode(node, "TSLiteralType");
  }

  tsParseTemplateLiteralType() {
    const node = this.startNode();
    node.literal = this.parseTemplate(false);
    return this.finishNode(node, "TSLiteralType");
  }

  parseTemplateSubstitution() {
    if (this.state.inType) return this.tsParseType();
    return super.parseTemplateSubstitution();
  }

  tsParseThisTypeOrThisTypePredicate() {
    const thisKeyword = this.tsParseThisTypeNode();

    if (this.isContextual(107) && !this.hasPrecedingLineBreak()) {
      return this.tsParseThisTypePredicate(thisKeyword);
    } else {
      return thisKeyword;
    }
  }

  tsParseNonArrayType() {
    switch (this.state.type) {
      case 123:
      case 124:
      case 125:
      case 79:
      case 80:
        return this.tsParseLiteralTypeNode();

      case 47:
        if (this.state.value === "-") {
          const node = this.startNode();
          const nextToken = this.lookahead();

          if (nextToken.type !== 124 && nextToken.type !== 125) {
            throw this.unexpected();
          }

          node.literal = this.parseMaybeUnary();
          return this.finishNode(node, "TSLiteralType");
        }

        break;

      case 72:
        return this.tsParseThisTypeOrThisTypePredicate();

      case 81:
        return this.tsParseTypeQuery();

      case 77:
        return this.tsParseImportType();

      case 5:
        return this.tsLookAhead(this.tsIsStartOfMappedType.bind(this)) ? this.tsParseMappedType() : this.tsParseTypeLiteral();

      case 0:
        return this.tsParseTupleType();

      case 10:
        return this.tsParseParenthesizedType();

      case 22:
        return this.tsParseTemplateLiteralType();

      default:
        {
          const {
            type
          } = this.state;

          if (tokenIsIdentifier(type) || type === 82 || type === 78) {
            const nodeType = type === 82 ? "TSVoidKeyword" : type === 78 ? "TSNullKeyword" : keywordTypeFromName(this.state.value);

            if (nodeType !== undefined && this.lookaheadCharCode() !== 46) {
              const node = this.startNode();
              this.next();
              return this.finishNode(node, nodeType);
            }

            return this.tsParseTypeReference();
          }
        }
    }

    throw this.unexpected();
  }

  tsParseArrayTypeOrHigher() {
    let type = this.tsParseNonArrayType();

    while (!this.hasPrecedingLineBreak() && this.eat(0)) {
      if (this.match(3)) {
        const node = this.startNodeAtNode(type);
        node.elementType = type;
        this.expect(3);
        type = this.finishNode(node, "TSArrayType");
      } else {
        const node = this.startNodeAtNode(type);
        node.objectType = type;
        node.indexType = this.tsParseType();
        this.expect(3);
        type = this.finishNode(node, "TSIndexedAccessType");
      }
    }

    return type;
  }

  tsParseTypeOperator() {
    const node = this.startNode();
    const operator = this.state.value;
    this.next();
    node.operator = operator;
    node.typeAnnotation = this.tsParseTypeOperatorOrHigher();

    if (operator === "readonly") {
      this.tsCheckTypeAnnotationForReadOnly(node);
    }

    return this.finishNode(node, "TSTypeOperator");
  }

  tsCheckTypeAnnotationForReadOnly(node) {
    switch (node.typeAnnotation.type) {
      case "TSTupleType":
      case "TSArrayType":
        return;

      default:
        this.raise(node.start, TSErrors.UnexpectedReadonly);
    }
  }

  tsParseInferType() {
    const node = this.startNode();
    this.expectContextual(106);
    const typeParameter = this.startNode();
    typeParameter.name = this.tsParseTypeParameterName();
    node.typeParameter = this.finishNode(typeParameter, "TSTypeParameter");
    return this.finishNode(node, "TSInferType");
  }

  tsParseTypeOperatorOrHigher() {
    const isTypeOperator = tokenIsTSTypeOperator(this.state.type) && !this.state.containsEsc;
    return isTypeOperator ? this.tsParseTypeOperator() : this.isContextual(106) ? this.tsParseInferType() : this.tsParseArrayTypeOrHigher();
  }

  tsParseUnionOrIntersectionType(kind, parseConstituentType, operator) {
    const node = this.startNode();
    const hasLeadingOperator = this.eat(operator);
    const types = [];

    do {
      types.push(parseConstituentType());
    } while (this.eat(operator));

    if (types.length === 1 && !hasLeadingOperator) {
      return types[0];
    }

    node.types = types;
    return this.finishNode(node, kind);
  }

  tsParseIntersectionTypeOrHigher() {
    return this.tsParseUnionOrIntersectionType("TSIntersectionType", this.tsParseTypeOperatorOrHigher.bind(this), 41);
  }

  tsParseUnionTypeOrHigher() {
    return this.tsParseUnionOrIntersectionType("TSUnionType", this.tsParseIntersectionTypeOrHigher.bind(this), 39);
  }

  tsIsStartOfFunctionType() {
    if (this.match(43)) {
      return true;
    }

    return this.match(10) && this.tsLookAhead(this.tsIsUnambiguouslyStartOfFunctionType.bind(this));
  }

  tsSkipParameterStart() {
    if (tokenIsIdentifier(this.state.type) || this.match(72)) {
      this.next();
      return true;
    }

    if (this.match(5)) {
      let braceStackCounter = 1;
      this.next();

      while (braceStackCounter > 0) {
        if (this.match(5)) {
          ++braceStackCounter;
        } else if (this.match(8)) {
          --braceStackCounter;
        }

        this.next();
      }

      return true;
    }

    if (this.match(0)) {
      let braceStackCounter = 1;
      this.next();

      while (braceStackCounter > 0) {
        if (this.match(0)) {
          ++braceStackCounter;
        } else if (this.match(3)) {
          --braceStackCounter;
        }

        this.next();
      }

      return true;
    }

    return false;
  }

  tsIsUnambiguouslyStartOfFunctionType() {
    this.next();

    if (this.match(11) || this.match(21)) {
      return true;
    }

    if (this.tsSkipParameterStart()) {
      if (this.match(14) || this.match(12) || this.match(17) || this.match(27)) {
        return true;
      }

      if (this.match(11)) {
        this.next();

        if (this.match(19)) {
          return true;
        }
      }
    }

    return false;
  }

  tsParseTypeOrTypePredicateAnnotation(returnToken) {
    return this.tsInType(() => {
      const t = this.startNode();
      this.expect(returnToken);
      const node = this.startNode();
      const asserts = !!this.tsTryParse(this.tsParseTypePredicateAsserts.bind(this));

      if (asserts && this.match(72)) {
        let thisTypePredicate = this.tsParseThisTypeOrThisTypePredicate();

        if (thisTypePredicate.type === "TSThisType") {
          node.parameterName = thisTypePredicate;
          node.asserts = true;
          node.typeAnnotation = null;
          thisTypePredicate = this.finishNode(node, "TSTypePredicate");
        } else {
          this.resetStartLocationFromNode(thisTypePredicate, node);
          thisTypePredicate.asserts = true;
        }

        t.typeAnnotation = thisTypePredicate;
        return this.finishNode(t, "TSTypeAnnotation");
      }

      const typePredicateVariable = this.tsIsIdentifier() && this.tsTryParse(this.tsParseTypePredicatePrefix.bind(this));

      if (!typePredicateVariable) {
        if (!asserts) {
          return this.tsParseTypeAnnotation(false, t);
        }

        node.parameterName = this.parseIdentifier();
        node.asserts = asserts;
        node.typeAnnotation = null;
        t.typeAnnotation = this.finishNode(node, "TSTypePredicate");
        return this.finishNode(t, "TSTypeAnnotation");
      }

      const type = this.tsParseTypeAnnotation(false);
      node.parameterName = typePredicateVariable;
      node.typeAnnotation = type;
      node.asserts = asserts;
      t.typeAnnotation = this.finishNode(node, "TSTypePredicate");
      return this.finishNode(t, "TSTypeAnnotation");
    });
  }

  tsTryParseTypeOrTypePredicateAnnotation() {
    return this.match(14) ? this.tsParseTypeOrTypePredicateAnnotation(14) : undefined;
  }

  tsTryParseTypeAnnotation() {
    return this.match(14) ? this.tsParseTypeAnnotation() : undefined;
  }

  tsTryParseType() {
    return this.tsEatThenParseType(14);
  }

  tsParseTypePredicatePrefix() {
    const id = this.parseIdentifier();

    if (this.isContextual(107) && !this.hasPrecedingLineBreak()) {
      this.next();
      return id;
    }
  }

  tsParseTypePredicateAsserts() {
    if (this.state.type !== 100) {
      return false;
    }

    const containsEsc = this.state.containsEsc;
    this.next();

    if (!tokenIsIdentifier(this.state.type) && !this.match(72)) {
      return false;
    }

    if (containsEsc) {
      this.raise(this.state.lastTokStart, ErrorMessages.InvalidEscapedReservedWord, "asserts");
    }

    return true;
  }

  tsParseTypeAnnotation(eatColon = true, t = this.startNode()) {
    this.tsInType(() => {
      if (eatColon) this.expect(14);
      t.typeAnnotation = this.tsParseType();
    });
    return this.finishNode(t, "TSTypeAnnotation");
  }

  tsParseType() {
    assert(this.state.inType);
    const type = this.tsParseNonConditionalType();

    if (this.hasPrecedingLineBreak() || !this.eat(75)) {
      return type;
    }

    const node = this.startNodeAtNode(type);
    node.checkType = type;
    node.extendsType = this.tsParseNonConditionalType();
    this.expect(17);
    node.trueType = this.tsParseType();
    this.expect(14);
    node.falseType = this.tsParseType();
    return this.finishNode(node, "TSConditionalType");
  }

  isAbstractConstructorSignature() {
    return this.isContextual(114) && this.lookahead().type === 71;
  }

  tsParseNonConditionalType() {
    if (this.tsIsStartOfFunctionType()) {
      return this.tsParseFunctionOrConstructorType("TSFunctionType");
    }

    if (this.match(71)) {
      return this.tsParseFunctionOrConstructorType("TSConstructorType");
    } else if (this.isAbstractConstructorSignature()) {
      return this.tsParseFunctionOrConstructorType("TSConstructorType", true);
    }

    return this.tsParseUnionTypeOrHigher();
  }

  tsParseTypeAssertion() {
    if (this.getPluginOption("typescript", "disallowAmbiguousJSXLike")) {
      this.raise(this.state.start, TSErrors.ReservedTypeAssertion);
    }

    const node = this.startNode();

    const _const = this.tsTryNextParseConstantContext();

    node.typeAnnotation = _const || this.tsNextThenParseType();
    this.expect(44);
    node.expression = this.parseMaybeUnary();
    return this.finishNode(node, "TSTypeAssertion");
  }

  tsParseHeritageClause(descriptor) {
    const originalStart = this.state.start;
    const delimitedList = this.tsParseDelimitedList("HeritageClauseElement", this.tsParseExpressionWithTypeArguments.bind(this));

    if (!delimitedList.length) {
      this.raise(originalStart, TSErrors.EmptyHeritageClauseType, descriptor);
    }

    return delimitedList;
  }

  tsParseExpressionWithTypeArguments() {
    const node = this.startNode();
    node.expression = this.tsParseEntityName(false);

    if (this.match(43)) {
      node.typeParameters = this.tsParseTypeArguments();
    }

    return this.finishNode(node, "TSExpressionWithTypeArguments");
  }

  tsParseInterfaceDeclaration(node) {
    if (tokenIsIdentifier(this.state.type)) {
      node.id = this.parseIdentifier();
      this.checkLVal(node.id, "typescript interface declaration", BIND_TS_INTERFACE);
    } else {
      node.id = null;
      this.raise(this.state.start, TSErrors.MissingInterfaceName);
    }

    node.typeParameters = this.tsTryParseTypeParameters();

    if (this.eat(75)) {
      node.extends = this.tsParseHeritageClause("extends");
    }

    const body = this.startNode();
    body.body = this.tsInType(this.tsParseObjectTypeMembers.bind(this));
    node.body = this.finishNode(body, "TSInterfaceBody");
    return this.finishNode(node, "TSInterfaceDeclaration");
  }

  tsParseTypeAliasDeclaration(node) {
    node.id = this.parseIdentifier();
    this.checkLVal(node.id, "typescript type alias", BIND_TS_TYPE);
    node.typeParameters = this.tsTryParseTypeParameters();
    node.typeAnnotation = this.tsInType(() => {
      this.expect(27);

      if (this.isContextual(105) && this.lookahead().type !== 16) {
        const node = this.startNode();
        this.next();
        return this.finishNode(node, "TSIntrinsicKeyword");
      }

      return this.tsParseType();
    });
    this.semicolon();
    return this.finishNode(node, "TSTypeAliasDeclaration");
  }

  tsInNoContext(cb) {
    const oldContext = this.state.context;
    this.state.context = [oldContext[0]];

    try {
      return cb();
    } finally {
      this.state.context = oldContext;
    }
  }

  tsInType(cb) {
    const oldInType = this.state.inType;
    this.state.inType = true;

    try {
      return cb();
    } finally {
      this.state.inType = oldInType;
    }
  }

  tsEatThenParseType(token) {
    return !this.match(token) ? undefined : this.tsNextThenParseType();
  }

  tsExpectThenParseType(token) {
    return this.tsDoThenParseType(() => this.expect(token));
  }

  tsNextThenParseType() {
    return this.tsDoThenParseType(() => this.next());
  }

  tsDoThenParseType(cb) {
    return this.tsInType(() => {
      cb();
      return this.tsParseType();
    });
  }

  tsParseEnumMember() {
    const node = this.startNode();
    node.id = this.match(123) ? this.parseExprAtom() : this.parseIdentifier(true);

    if (this.eat(27)) {
      node.initializer = this.parseMaybeAssignAllowIn();
    }

    return this.finishNode(node, "TSEnumMember");
  }

  tsParseEnumDeclaration(node, isConst) {
    if (isConst) node.const = true;
    node.id = this.parseIdentifier();
    this.checkLVal(node.id, "typescript enum declaration", isConst ? BIND_TS_CONST_ENUM : BIND_TS_ENUM);
    this.expect(5);
    node.members = this.tsParseDelimitedList("EnumMembers", this.tsParseEnumMember.bind(this));
    this.expect(8);
    return this.finishNode(node, "TSEnumDeclaration");
  }

  tsParseModuleBlock() {
    const node = this.startNode();
    this.scope.enter(SCOPE_OTHER);
    this.expect(5);
    this.parseBlockOrModuleBlockBody(node.body = [], undefined, true, 8);
    this.scope.exit();
    return this.finishNode(node, "TSModuleBlock");
  }

  tsParseModuleOrNamespaceDeclaration(node, nested = false) {
    node.id = this.parseIdentifier();

    if (!nested) {
      this.checkLVal(node.id, "module or namespace declaration", BIND_TS_NAMESPACE);
    }

    if (this.eat(16)) {
      const inner = this.startNode();
      this.tsParseModuleOrNamespaceDeclaration(inner, true);
      node.body = inner;
    } else {
      this.scope.enter(SCOPE_TS_MODULE);
      this.prodParam.enter(PARAM);
      node.body = this.tsParseModuleBlock();
      this.prodParam.exit();
      this.scope.exit();
    }

    return this.finishNode(node, "TSModuleDeclaration");
  }

  tsParseAmbientExternalModuleDeclaration(node) {
    if (this.isContextual(103)) {
      node.global = true;
      node.id = this.parseIdentifier();
    } else if (this.match(123)) {
      node.id = this.parseExprAtom();
    } else {
      this.unexpected();
    }

    if (this.match(5)) {
      this.scope.enter(SCOPE_TS_MODULE);
      this.prodParam.enter(PARAM);
      node.body = this.tsParseModuleBlock();
      this.prodParam.exit();
      this.scope.exit();
    } else {
      this.semicolon();
    }

    return this.finishNode(node, "TSModuleDeclaration");
  }

  tsParseImportEqualsDeclaration(node, isExport) {
    node.isExport = isExport || false;
    node.id = this.parseIdentifier();
    this.checkLVal(node.id, "import equals declaration", BIND_LEXICAL);
    this.expect(27);
    const moduleReference = this.tsParseModuleReference();

    if (node.importKind === "type" && moduleReference.type !== "TSExternalModuleReference") {
      this.raise(moduleReference.start, TSErrors.ImportAliasHasImportType);
    }

    node.moduleReference = moduleReference;
    this.semicolon();
    return this.finishNode(node, "TSImportEqualsDeclaration");
  }

  tsIsExternalModuleReference() {
    return this.isContextual(110) && this.lookaheadCharCode() === 40;
  }

  tsParseModuleReference() {
    return this.tsIsExternalModuleReference() ? this.tsParseExternalModuleReference() : this.tsParseEntityName(false);
  }

  tsParseExternalModuleReference() {
    const node = this.startNode();
    this.expectContextual(110);
    this.expect(10);

    if (!this.match(123)) {
      throw this.unexpected();
    }

    node.expression = this.parseExprAtom();
    this.expect(11);
    return this.finishNode(node, "TSExternalModuleReference");
  }

  tsLookAhead(f) {
    const state = this.state.clone();
    const res = f();
    this.state = state;
    return res;
  }

  tsTryParseAndCatch(f) {
    const result = this.tryParse(abort => f() || abort());
    if (result.aborted || !result.node) return undefined;
    if (result.error) this.state = result.failState;
    return result.node;
  }

  tsTryParse(f) {
    const state = this.state.clone();
    const result = f();

    if (result !== undefined && result !== false) {
      return result;
    } else {
      this.state = state;
      return undefined;
    }
  }

  tsTryParseDeclare(nany) {
    if (this.isLineTerminator()) {
      return;
    }

    let starttype = this.state.type;
    let kind;

    if (this.isContextual(93)) {
      starttype = 68;
      kind = "let";
    }

    return this.tsInAmbientContext(() => {
      switch (starttype) {
        case 62:
          nany.declare = true;
          return this.parseFunctionStatement(nany, false, true);

        case 74:
          nany.declare = true;
          return this.parseClass(nany, true, false);

        case 69:
          if (this.match(69) && this.isLookaheadContextual("enum")) {
            this.expect(69);
            this.expectContextual(116);
            return this.tsParseEnumDeclaration(nany, true);
          }

        case 68:
          kind = kind || this.state.value;
          return this.parseVarStatement(nany, kind);

        case 103:
          return this.tsParseAmbientExternalModuleDeclaration(nany);

        default:
          {
            if (tokenIsIdentifier(starttype)) {
              return this.tsParseDeclaration(nany, this.state.value, true);
            }
          }
      }
    });
  }

  tsTryParseExportDeclaration() {
    return this.tsParseDeclaration(this.startNode(), this.state.value, true);
  }

  tsParseExpressionStatement(node, expr) {
    switch (expr.name) {
      case "declare":
        {
          const declaration = this.tsTryParseDeclare(node);

          if (declaration) {
            declaration.declare = true;
            return declaration;
          }

          break;
        }

      case "global":
        if (this.match(5)) {
          this.scope.enter(SCOPE_TS_MODULE);
          this.prodParam.enter(PARAM);
          const mod = node;
          mod.global = true;
          mod.id = expr;
          mod.body = this.tsParseModuleBlock();
          this.scope.exit();
          this.prodParam.exit();
          return this.finishNode(mod, "TSModuleDeclaration");
        }

        break;

      default:
        return this.tsParseDeclaration(node, expr.name, false);
    }
  }

  tsParseDeclaration(node, value, next) {
    switch (value) {
      case "abstract":
        if (this.tsCheckLineTerminator(next) && (this.match(74) || tokenIsIdentifier(this.state.type))) {
          return this.tsParseAbstractDeclaration(node);
        }

        break;

      case "enum":
        if (next || tokenIsIdentifier(this.state.type)) {
          if (next) this.next();
          return this.tsParseEnumDeclaration(node, false);
        }

        break;

      case "interface":
        if (this.tsCheckLineTerminator(next) && tokenIsIdentifier(this.state.type)) {
          return this.tsParseInterfaceDeclaration(node);
        }

        break;

      case "module":
        if (this.tsCheckLineTerminator(next)) {
          if (this.match(123)) {
            return this.tsParseAmbientExternalModuleDeclaration(node);
          } else if (tokenIsIdentifier(this.state.type)) {
            return this.tsParseModuleOrNamespaceDeclaration(node);
          }
        }

        break;

      case "namespace":
        if (this.tsCheckLineTerminator(next) && tokenIsIdentifier(this.state.type)) {
          return this.tsParseModuleOrNamespaceDeclaration(node);
        }

        break;

      case "type":
        if (this.tsCheckLineTerminator(next) && tokenIsIdentifier(this.state.type)) {
          return this.tsParseTypeAliasDeclaration(node);
        }

        break;
    }
  }

  tsCheckLineTerminator(next) {
    if (next) {
      if (this.hasFollowingLineBreak()) return false;
      this.next();
      return true;
    }

    return !this.isLineTerminator();
  }

  tsTryParseGenericAsyncArrowFunction(startPos, startLoc) {
    if (!this.match(43)) {
      return undefined;
    }

    const oldMaybeInArrowParameters = this.state.maybeInArrowParameters;
    this.state.maybeInArrowParameters = true;
    const res = this.tsTryParseAndCatch(() => {
      const node = this.startNodeAt(startPos, startLoc);
      node.typeParameters = this.tsParseTypeParameters();
      super.parseFunctionParams(node);
      node.returnType = this.tsTryParseTypeOrTypePredicateAnnotation();
      this.expect(19);
      return node;
    });
    this.state.maybeInArrowParameters = oldMaybeInArrowParameters;

    if (!res) {
      return undefined;
    }

    return this.parseArrowExpression(res, null, true);
  }

  tsParseTypeArguments() {
    const node = this.startNode();
    node.params = this.tsInType(() => this.tsInNoContext(() => {
      this.expect(43);
      return this.tsParseDelimitedList("TypeParametersOrArguments", this.tsParseType.bind(this));
    }));

    if (node.params.length === 0) {
      this.raise(node.start, TSErrors.EmptyTypeArguments);
    }

    this.expect(44);
    return this.finishNode(node, "TSTypeParameterInstantiation");
  }

  tsIsDeclarationStart() {
    return tokenIsTSDeclarationStart(this.state.type);
  }

  isExportDefaultSpecifier() {
    if (this.tsIsDeclarationStart()) return false;
    return super.isExportDefaultSpecifier();
  }

  parseAssignableListItem(allowModifiers, decorators) {
    const startPos = this.state.start;
    const startLoc = this.state.startLoc;
    let accessibility;
    let readonly = false;
    let override = false;

    if (allowModifiers !== undefined) {
      const modified = {};
      this.tsParseModifiers(modified, ["public", "private", "protected", "override", "readonly"]);
      accessibility = modified.accessibility;
      override = modified.override;
      readonly = modified.readonly;

      if (allowModifiers === false && (accessibility || readonly || override)) {
        this.raise(startPos, TSErrors.UnexpectedParameterModifier);
      }
    }

    const left = this.parseMaybeDefault();
    this.parseAssignableListItemTypes(left);
    const elt = this.parseMaybeDefault(left.start, left.loc.start, left);

    if (accessibility || readonly || override) {
      const pp = this.startNodeAt(startPos, startLoc);

      if (decorators.length) {
        pp.decorators = decorators;
      }

      if (accessibility) pp.accessibility = accessibility;
      if (readonly) pp.readonly = readonly;
      if (override) pp.override = override;

      if (elt.type !== "Identifier" && elt.type !== "AssignmentPattern") {
        this.raise(pp.start, TSErrors.UnsupportedParameterPropertyKind);
      }

      pp.parameter = elt;
      return this.finishNode(pp, "TSParameterProperty");
    }

    if (decorators.length) {
      left.decorators = decorators;
    }

    return elt;
  }

  parseFunctionBodyAndFinish(node, type, isMethod = false) {
    if (this.match(14)) {
      node.returnType = this.tsParseTypeOrTypePredicateAnnotation(14);
    }

    const bodilessType = type === "FunctionDeclaration" ? "TSDeclareFunction" : type === "ClassMethod" || type === "ClassPrivateMethod" ? "TSDeclareMethod" : undefined;

    if (bodilessType && !this.match(5) && this.isLineTerminator()) {
      this.finishNode(node, bodilessType);
      return;
    }

    if (bodilessType === "TSDeclareFunction" && this.state.isAmbientContext) {
      this.raise(node.start, TSErrors.DeclareFunctionHasImplementation);

      if (node.declare) {
        super.parseFunctionBodyAndFinish(node, bodilessType, isMethod);
        return;
      }
    }

    super.parseFunctionBodyAndFinish(node, type, isMethod);
  }

  registerFunctionStatementId(node) {
    if (!node.body && node.id) {
      this.checkLVal(node.id, "function name", BIND_TS_AMBIENT);
    } else {
      super.registerFunctionStatementId(...arguments);
    }
  }

  tsCheckForInvalidTypeCasts(items) {
    items.forEach(node => {
      if ((node == null ? void 0 : node.type) === "TSTypeCastExpression") {
        this.raise(node.typeAnnotation.start, TSErrors.UnexpectedTypeAnnotation);
      }
    });
  }

  toReferencedList(exprList, isInParens) {
    this.tsCheckForInvalidTypeCasts(exprList);
    return exprList;
  }

  parseArrayLike(...args) {
    const node = super.parseArrayLike(...args);

    if (node.type === "ArrayExpression") {
      this.tsCheckForInvalidTypeCasts(node.elements);
    }

    return node;
  }

  parseSubscript(base, startPos, startLoc, noCalls, state) {
    if (!this.hasPrecedingLineBreak() && this.match(33)) {
      this.state.canStartJSXElement = false;
      this.next();
      const nonNullExpression = this.startNodeAt(startPos, startLoc);
      nonNullExpression.expression = base;
      return this.finishNode(nonNullExpression, "TSNonNullExpression");
    }

    let isOptionalCall = false;

    if (this.match(18) && this.lookaheadCharCode() === 60) {
      if (noCalls) {
        state.stop = true;
        return base;
      }

      state.optionalChainMember = isOptionalCall = true;
      this.next();
    }

    if (this.match(43)) {
      let missingParenErrorPos;
      const result = this.tsTryParseAndCatch(() => {
        if (!noCalls && this.atPossibleAsyncArrow(base)) {
          const asyncArrowFn = this.tsTryParseGenericAsyncArrowFunction(startPos, startLoc);

          if (asyncArrowFn) {
            return asyncArrowFn;
          }
        }

        const node = this.startNodeAt(startPos, startLoc);
        node.callee = base;
        const typeArguments = this.tsParseTypeArguments();

        if (typeArguments) {
          if (isOptionalCall && !this.match(10)) {
            missingParenErrorPos = this.state.pos;
            this.unexpected();
          }

          if (!noCalls && this.eat(10)) {
            node.arguments = this.parseCallExpressionArguments(11, false);
            this.tsCheckForInvalidTypeCasts(node.arguments);
            node.typeParameters = typeArguments;

            if (state.optionalChainMember) {
              node.optional = isOptionalCall;
            }

            return this.finishCallExpression(node, state.optionalChainMember);
          } else if (this.match(22)) {
            const result = this.parseTaggedTemplateExpression(base, startPos, startLoc, state);
            result.typeParameters = typeArguments;
            return result;
          }
        }

        this.unexpected();
      });

      if (missingParenErrorPos) {
        this.unexpected(missingParenErrorPos, 10);
      }

      if (result) return result;
    }

    return super.parseSubscript(base, startPos, startLoc, noCalls, state);
  }

  parseNewArguments(node) {
    if (this.match(43)) {
      const typeParameters = this.tsTryParseAndCatch(() => {
        const args = this.tsParseTypeArguments();
        if (!this.match(10)) this.unexpected();
        return args;
      });

      if (typeParameters) {
        node.typeParameters = typeParameters;
      }
    }

    super.parseNewArguments(node);
  }

  parseExprOp(left, leftStartPos, leftStartLoc, minPrec) {
    if (tokenOperatorPrecedence(52) > minPrec && !this.hasPrecedingLineBreak() && this.isContextual(87)) {
      const node = this.startNodeAt(leftStartPos, leftStartLoc);
      node.expression = left;

      const _const = this.tsTryNextParseConstantContext();

      if (_const) {
        node.typeAnnotation = _const;
      } else {
        node.typeAnnotation = this.tsNextThenParseType();
      }

      this.finishNode(node, "TSAsExpression");
      this.reScan_lt_gt();
      return this.parseExprOp(node, leftStartPos, leftStartLoc, minPrec);
    }

    return super.parseExprOp(left, leftStartPos, leftStartLoc, minPrec);
  }

  checkReservedWord(word, startLoc, checkKeywords, isBinding) {}

  checkDuplicateExports() {}

  parseImport(node) {
    node.importKind = "value";

    if (tokenIsIdentifier(this.state.type) || this.match(49) || this.match(5)) {
      let ahead = this.lookahead();

      if (this.isContextual(120) && ahead.type !== 12 && ahead.type !== 91 && ahead.type !== 27) {
        node.importKind = "type";
        this.next();
        ahead = this.lookahead();
      }

      if (tokenIsIdentifier(this.state.type) && ahead.type === 27) {
        return this.tsParseImportEqualsDeclaration(node);
      }
    }

    const importNode = super.parseImport(node);

    if (importNode.importKind === "type" && importNode.specifiers.length > 1 && importNode.specifiers[0].type === "ImportDefaultSpecifier") {
      this.raise(importNode.start, TSErrors.TypeImportCannotSpecifyDefaultAndNamed);
    }

    return importNode;
  }

  parseExport(node) {
    if (this.match(77)) {
      this.next();

      if (this.isContextual(120) && this.lookaheadCharCode() !== 61) {
        node.importKind = "type";
        this.next();
      } else {
        node.importKind = "value";
      }

      return this.tsParseImportEqualsDeclaration(node, true);
    } else if (this.eat(27)) {
      const assign = node;
      assign.expression = this.parseExpression();
      this.semicolon();
      return this.finishNode(assign, "TSExportAssignment");
    } else if (this.eatContextual(87)) {
      const decl = node;
      this.expectContextual(118);
      decl.id = this.parseIdentifier();
      this.semicolon();
      return this.finishNode(decl, "TSNamespaceExportDeclaration");
    } else {
      if (this.isContextual(120) && this.lookahead().type === 5) {
        this.next();
        node.exportKind = "type";
      } else {
        node.exportKind = "value";
      }

      return super.parseExport(node);
    }
  }

  isAbstractClass() {
    return this.isContextual(114) && this.lookahead().type === 74;
  }

  parseExportDefaultExpression() {
    if (this.isAbstractClass()) {
      const cls = this.startNode();
      this.next();
      cls.abstract = true;
      this.parseClass(cls, true, true);
      return cls;
    }

    if (this.match(119)) {
      const interfaceNode = this.startNode();
      this.next();
      const result = this.tsParseInterfaceDeclaration(interfaceNode);
      if (result) return result;
    }

    return super.parseExportDefaultExpression();
  }

  parseStatementContent(context, topLevel) {
    if (this.state.type === 69) {
      const ahead = this.lookahead();

      if (ahead.type === 116) {
        const node = this.startNode();
        this.next();
        this.expectContextual(116);
        return this.tsParseEnumDeclaration(node, true);
      }
    }

    return super.parseStatementContent(context, topLevel);
  }

  parseAccessModifier() {
    return this.tsParseModifier(["public", "protected", "private"]);
  }

  tsHasSomeModifiers(member, modifiers) {
    return modifiers.some(modifier => {
      if (tsIsAccessModifier(modifier)) {
        return member.accessibility === modifier;
      }

      return !!member[modifier];
    });
  }

  tsIsStartOfStaticBlocks() {
    return this.isContextual(98) && this.lookaheadCharCode() === 123;
  }

  parseClassMember(classBody, member, state) {
    const modifiers = ["declare", "private", "public", "protected", "override", "abstract", "readonly", "static"];
    this.tsParseModifiers(member, modifiers, undefined, undefined, true);

    const callParseClassMemberWithIsStatic = () => {
      if (this.tsIsStartOfStaticBlocks()) {
        this.next();
        this.next();

        if (this.tsHasSomeModifiers(member, modifiers)) {
          this.raise(this.state.pos, TSErrors.StaticBlockCannotHaveModifier);
        }

        this.parseClassStaticBlock(classBody, member);
      } else {
        this.parseClassMemberWithIsStatic(classBody, member, state, !!member.static);
      }
    };

    if (member.declare) {
      this.tsInAmbientContext(callParseClassMemberWithIsStatic);
    } else {
      callParseClassMemberWithIsStatic();
    }
  }

  parseClassMemberWithIsStatic(classBody, member, state, isStatic) {
    const idx = this.tsTryParseIndexSignature(member);

    if (idx) {
      classBody.body.push(idx);

      if (member.abstract) {
        this.raise(member.start, TSErrors.IndexSignatureHasAbstract);
      }

      if (member.accessibility) {
        this.raise(member.start, TSErrors.IndexSignatureHasAccessibility, member.accessibility);
      }

      if (member.declare) {
        this.raise(member.start, TSErrors.IndexSignatureHasDeclare);
      }

      if (member.override) {
        this.raise(member.start, TSErrors.IndexSignatureHasOverride);
      }

      return;
    }

    if (!this.state.inAbstractClass && member.abstract) {
      this.raise(member.start, TSErrors.NonAbstractClassHasAbstractMethod);
    }

    if (member.override) {
      if (!state.hadSuperClass) {
        this.raise(member.start, TSErrors.OverrideNotInSubClass);
      }
    }

    super.parseClassMemberWithIsStatic(classBody, member, state, isStatic);
  }

  parsePostMemberNameModifiers(methodOrProp) {
    const optional = this.eat(17);
    if (optional) methodOrProp.optional = true;

    if (methodOrProp.readonly && this.match(10)) {
      this.raise(methodOrProp.start, TSErrors.ClassMethodHasReadonly);
    }

    if (methodOrProp.declare && this.match(10)) {
      this.raise(methodOrProp.start, TSErrors.ClassMethodHasDeclare);
    }
  }

  parseExpressionStatement(node, expr) {
    const decl = expr.type === "Identifier" ? this.tsParseExpressionStatement(node, expr) : undefined;
    return decl || super.parseExpressionStatement(node, expr);
  }

  shouldParseExportDeclaration() {
    if (this.tsIsDeclarationStart()) return true;
    return super.shouldParseExportDeclaration();
  }

  parseConditional(expr, startPos, startLoc, refExpressionErrors) {
    if (!this.state.maybeInArrowParameters || !this.match(17)) {
      return super.parseConditional(expr, startPos, startLoc, refExpressionErrors);
    }

    const result = this.tryParse(() => super.parseConditional(expr, startPos, startLoc));

    if (!result.node) {
      if (result.error) {
        super.setOptionalParametersError(refExpressionErrors, result.error);
      }

      return expr;
    }

    if (result.error) this.state = result.failState;
    return result.node;
  }

  parseParenItem(node, startPos, startLoc) {
    node = super.parseParenItem(node, startPos, startLoc);

    if (this.eat(17)) {
      node.optional = true;
      this.resetEndLocation(node);
    }

    if (this.match(14)) {
      const typeCastNode = this.startNodeAt(startPos, startLoc);
      typeCastNode.expression = node;
      typeCastNode.typeAnnotation = this.tsParseTypeAnnotation();
      return this.finishNode(typeCastNode, "TSTypeCastExpression");
    }

    return node;
  }

  parseExportDeclaration(node) {
    const startPos = this.state.start;
    const startLoc = this.state.startLoc;
    const isDeclare = this.eatContextual(115);

    if (isDeclare && (this.isContextual(115) || !this.shouldParseExportDeclaration())) {
      throw this.raise(this.state.start, TSErrors.ExpectedAmbientAfterExportDeclare);
    }

    let declaration;

    if (tokenIsIdentifier(this.state.type)) {
      declaration = this.tsTryParseExportDeclaration();
    }

    if (!declaration) {
      declaration = super.parseExportDeclaration(node);
    }

    if (declaration && (declaration.type === "TSInterfaceDeclaration" || declaration.type === "TSTypeAliasDeclaration" || isDeclare)) {
      node.exportKind = "type";
    }

    if (declaration && isDeclare) {
      this.resetStartLocation(declaration, startPos, startLoc);
      declaration.declare = true;
    }

    return declaration;
  }

  parseClassId(node, isStatement, optionalId) {
    if ((!isStatement || optionalId) && this.isContextual(104)) {
      return;
    }

    super.parseClassId(node, isStatement, optionalId, node.declare ? BIND_TS_AMBIENT : BIND_CLASS);
    const typeParameters = this.tsTryParseTypeParameters();
    if (typeParameters) node.typeParameters = typeParameters;
  }

  parseClassPropertyAnnotation(node) {
    if (!node.optional && this.eat(33)) {
      node.definite = true;
    }

    const type = this.tsTryParseTypeAnnotation();
    if (type) node.typeAnnotation = type;
  }

  parseClassProperty(node) {
    this.parseClassPropertyAnnotation(node);

    if (this.state.isAmbientContext && this.match(27)) {
      this.raise(this.state.start, TSErrors.DeclareClassFieldHasInitializer);
    }

    if (node.abstract && this.match(27)) {
      const {
        key
      } = node;
      this.raise(this.state.start, TSErrors.AbstractPropertyHasInitializer, key.type === "Identifier" && !node.computed ? key.name : `[${this.input.slice(key.start, key.end)}]`);
    }

    return super.parseClassProperty(node);
  }

  parseClassPrivateProperty(node) {
    if (node.abstract) {
      this.raise(node.start, TSErrors.PrivateElementHasAbstract);
    }

    if (node.accessibility) {
      this.raise(node.start, TSErrors.PrivateElementHasAccessibility, node.accessibility);
    }

    this.parseClassPropertyAnnotation(node);
    return super.parseClassPrivateProperty(node);
  }

  pushClassMethod(classBody, method, isGenerator, isAsync, isConstructor, allowsDirectSuper) {
    const typeParameters = this.tsTryParseTypeParameters();

    if (typeParameters && isConstructor) {
      this.raise(typeParameters.start, TSErrors.ConstructorHasTypeParameters);
    }

    if (method.declare && (method.kind === "get" || method.kind === "set")) {
      this.raise(method.start, TSErrors.DeclareAccessor, method.kind);
    }

    if (typeParameters) method.typeParameters = typeParameters;
    super.pushClassMethod(classBody, method, isGenerator, isAsync, isConstructor, allowsDirectSuper);
  }

  pushClassPrivateMethod(classBody, method, isGenerator, isAsync) {
    const typeParameters = this.tsTryParseTypeParameters();
    if (typeParameters) method.typeParameters = typeParameters;
    super.pushClassPrivateMethod(classBody, method, isGenerator, isAsync);
  }

  declareClassPrivateMethodInScope(node, kind) {
    if (node.type === "TSDeclareMethod") return;
    if (node.type === "MethodDefinition" && !node.value.body) return;
    super.declareClassPrivateMethodInScope(node, kind);
  }

  parseClassSuper(node) {
    super.parseClassSuper(node);

    if (node.superClass && this.match(43)) {
      node.superTypeParameters = this.tsParseTypeArguments();
    }

    if (this.eatContextual(104)) {
      node.implements = this.tsParseHeritageClause("implements");
    }
  }

  parseObjPropValue(prop, ...args) {
    const typeParameters = this.tsTryParseTypeParameters();
    if (typeParameters) prop.typeParameters = typeParameters;
    super.parseObjPropValue(prop, ...args);
  }

  parseFunctionParams(node, allowModifiers) {
    const typeParameters = this.tsTryParseTypeParameters();
    if (typeParameters) node.typeParameters = typeParameters;
    super.parseFunctionParams(node, allowModifiers);
  }

  parseVarId(decl, kind) {
    super.parseVarId(decl, kind);

    if (decl.id.type === "Identifier" && this.eat(33)) {
      decl.definite = true;
    }

    const type = this.tsTryParseTypeAnnotation();

    if (type) {
      decl.id.typeAnnotation = type;
      this.resetEndLocation(decl.id);
    }
  }

  parseAsyncArrowFromCallExpression(node, call) {
    if (this.match(14)) {
      node.returnType = this.tsParseTypeAnnotation();
    }

    return super.parseAsyncArrowFromCallExpression(node, call);
  }

  parseMaybeAssign(...args) {
    var _jsx, _jsx2, _typeCast, _jsx3, _typeCast2, _jsx4, _typeCast3;

    let state;
    let jsx;
    let typeCast;

    if (this.hasPlugin("jsx") && (this.match(132) || this.match(43))) {
      state = this.state.clone();
      jsx = this.tryParse(() => super.parseMaybeAssign(...args), state);
      if (!jsx.error) return jsx.node;
      const {
        context
      } = this.state;

      if (context[context.length - 1] === types.j_oTag) {
        context.length -= 2;
      } else if (context[context.length - 1] === types.j_expr) {
        context.length -= 1;
      }
    }

    if (!((_jsx = jsx) != null && _jsx.error) && !this.match(43)) {
      return super.parseMaybeAssign(...args);
    }

    let typeParameters;
    state = state || this.state.clone();
    const arrow = this.tryParse(abort => {
      var _expr$extra, _typeParameters;

      typeParameters = this.tsParseTypeParameters();
      const expr = super.parseMaybeAssign(...args);

      if (expr.type !== "ArrowFunctionExpression" || (_expr$extra = expr.extra) != null && _expr$extra.parenthesized) {
        abort();
      }

      if (((_typeParameters = typeParameters) == null ? void 0 : _typeParameters.params.length) !== 0) {
        this.resetStartLocationFromNode(expr, typeParameters);
      }

      expr.typeParameters = typeParameters;
      return expr;
    }, state);

    if (!arrow.error && !arrow.aborted) {
      if (typeParameters) this.reportReservedArrowTypeParam(typeParameters);
      return arrow.node;
    }

    if (!jsx) {
      assert(!this.hasPlugin("jsx"));
      typeCast = this.tryParse(() => super.parseMaybeAssign(...args), state);
      if (!typeCast.error) return typeCast.node;
    }

    if ((_jsx2 = jsx) != null && _jsx2.node) {
      this.state = jsx.failState;
      return jsx.node;
    }

    if (arrow.node) {
      this.state = arrow.failState;
      if (typeParameters) this.reportReservedArrowTypeParam(typeParameters);
      return arrow.node;
    }

    if ((_typeCast = typeCast) != null && _typeCast.node) {
      this.state = typeCast.failState;
      return typeCast.node;
    }

    if ((_jsx3 = jsx) != null && _jsx3.thrown) throw jsx.error;
    if (arrow.thrown) throw arrow.error;
    if ((_typeCast2 = typeCast) != null && _typeCast2.thrown) throw typeCast.error;
    throw ((_jsx4 = jsx) == null ? void 0 : _jsx4.error) || arrow.error || ((_typeCast3 = typeCast) == null ? void 0 : _typeCast3.error);
  }

  reportReservedArrowTypeParam(node) {
    var _node$extra;

    if (node.params.length === 1 && !((_node$extra = node.extra) != null && _node$extra.trailingComma) && this.getPluginOption("typescript", "disallowAmbiguousJSXLike")) {
      this.raise(node.start, TSErrors.ReservedArrowTypeParam);
    }
  }

  parseMaybeUnary(refExpressionErrors) {
    if (!this.hasPlugin("jsx") && this.match(43)) {
      return this.tsParseTypeAssertion();
    } else {
      return super.parseMaybeUnary(refExpressionErrors);
    }
  }

  parseArrow(node) {
    if (this.match(14)) {
      const result = this.tryParse(abort => {
        const returnType = this.tsParseTypeOrTypePredicateAnnotation(14);
        if (this.canInsertSemicolon() || !this.match(19)) abort();
        return returnType;
      });
      if (result.aborted) return;

      if (!result.thrown) {
        if (result.error) this.state = result.failState;
        node.returnType = result.node;
      }
    }

    return super.parseArrow(node);
  }

  parseAssignableListItemTypes(param) {
    if (this.eat(17)) {
      if (param.type !== "Identifier" && !this.state.isAmbientContext && !this.state.inType) {
        this.raise(param.start, TSErrors.PatternIsOptional);
      }

      param.optional = true;
    }

    const type = this.tsTryParseTypeAnnotation();
    if (type) param.typeAnnotation = type;
    this.resetEndLocation(param);
    return param;
  }

  isAssignable(node, isBinding) {
    switch (node.type) {
      case "TSTypeCastExpression":
        return this.isAssignable(node.expression, isBinding);

      case "TSParameterProperty":
        return true;

      default:
        return super.isAssignable(node, isBinding);
    }
  }

  toAssignable(node, isLHS = false) {
    switch (node.type) {
      case "TSTypeCastExpression":
        return super.toAssignable(this.typeCastToParameter(node), isLHS);

      case "TSParameterProperty":
        return super.toAssignable(node, isLHS);

      case "ParenthesizedExpression":
        return this.toAssignableParenthesizedExpression(node, isLHS);

      case "TSAsExpression":
      case "TSNonNullExpression":
      case "TSTypeAssertion":
        node.expression = this.toAssignable(node.expression, isLHS);
        return node;

      default:
        return super.toAssignable(node, isLHS);
    }
  }

  toAssignableParenthesizedExpression(node, isLHS) {
    switch (node.expression.type) {
      case "TSAsExpression":
      case "TSNonNullExpression":
      case "TSTypeAssertion":
      case "ParenthesizedExpression":
        node.expression = this.toAssignable(node.expression, isLHS);
        return node;

      default:
        return super.toAssignable(node, isLHS);
    }
  }

  checkLVal(expr, contextDescription, ...args) {
    var _expr$extra2;

    switch (expr.type) {
      case "TSTypeCastExpression":
        return;

      case "TSParameterProperty":
        this.checkLVal(expr.parameter, "parameter property", ...args);
        return;

      case "TSAsExpression":
      case "TSTypeAssertion":
        if (!args[0] && contextDescription !== "parenthesized expression" && !((_expr$extra2 = expr.extra) != null && _expr$extra2.parenthesized)) {
          this.raise(expr.start, ErrorMessages.InvalidLhs, contextDescription);
          break;
        }

        this.checkLVal(expr.expression, "parenthesized expression", ...args);
        return;

      case "TSNonNullExpression":
        this.checkLVal(expr.expression, contextDescription, ...args);
        return;

      default:
        super.checkLVal(expr, contextDescription, ...args);
        return;
    }
  }

  parseBindingAtom() {
    switch (this.state.type) {
      case 72:
        return this.parseIdentifier(true);

      default:
        return super.parseBindingAtom();
    }
  }

  parseMaybeDecoratorArguments(expr) {
    if (this.match(43)) {
      const typeArguments = this.tsParseTypeArguments();

      if (this.match(10)) {
        const call = super.parseMaybeDecoratorArguments(expr);
        call.typeParameters = typeArguments;
        return call;
      }

      this.unexpected(this.state.start, 10);
    }

    return super.parseMaybeDecoratorArguments(expr);
  }

  checkCommaAfterRest(close) {
    if (this.state.isAmbientContext && this.match(12) && this.lookaheadCharCode() === close) {
      this.next();
    } else {
      super.checkCommaAfterRest(close);
    }
  }

  isClassMethod() {
    return this.match(43) || super.isClassMethod();
  }

  isClassProperty() {
    return this.match(33) || this.match(14) || super.isClassProperty();
  }

  parseMaybeDefault(...args) {
    const node = super.parseMaybeDefault(...args);

    if (node.type === "AssignmentPattern" && node.typeAnnotation && node.right.start < node.typeAnnotation.start) {
      this.raise(node.typeAnnotation.start, TSErrors.TypeAnnotationAfterAssign);
    }

    return node;
  }

  getTokenFromCode(code) {
    if (this.state.inType) {
      if (code === 62) {
        return this.finishOp(44, 1);
      }

      if (code === 60) {
        return this.finishOp(43, 1);
      }
    }

    return super.getTokenFromCode(code);
  }

  reScan_lt_gt() {
    const {
      type
    } = this.state;

    if (type === 43) {
      this.state.pos -= 1;
      this.readToken_lt();
    } else if (type === 44) {
      this.state.pos -= 1;
      this.readToken_gt();
    }
  }

  toAssignableList(exprList) {
    for (let i = 0; i < exprList.length; i++) {
      const expr = exprList[i];
      if (!expr) continue;

      switch (expr.type) {
        case "TSTypeCastExpression":
          exprList[i] = this.typeCastToParameter(expr);
          break;

        case "TSAsExpression":
        case "TSTypeAssertion":
          if (!this.state.maybeInArrowParameters) {
            exprList[i] = this.typeCastToParameter(expr);
          } else {
            this.raise(expr.start, TSErrors.UnexpectedTypeCastInParameter);
          }

          break;
      }
    }

    return super.toAssignableList(...arguments);
  }

  typeCastToParameter(node) {
    node.expression.typeAnnotation = node.typeAnnotation;
    this.resetEndLocation(node.expression, node.typeAnnotation.end, node.typeAnnotation.loc.end);
    return node.expression;
  }

  shouldParseArrow(params) {
    if (this.match(14)) {
      return params.every(expr => this.isAssignable(expr, true));
    }

    return super.shouldParseArrow(params);
  }

  shouldParseAsyncArrow() {
    return this.match(14) || super.shouldParseAsyncArrow();
  }

  canHaveLeadingDecorator() {
    return super.canHaveLeadingDecorator() || this.isAbstractClass();
  }

  jsxParseOpeningElementAfterName(node) {
    if (this.match(43)) {
      const typeArguments = this.tsTryParseAndCatch(() => this.tsParseTypeArguments());
      if (typeArguments) node.typeParameters = typeArguments;
    }

    return super.jsxParseOpeningElementAfterName(node);
  }

  getGetterSetterExpectedParamCount(method) {
    const baseCount = super.getGetterSetterExpectedParamCount(method);
    const params = this.getObjectOrClassMethodParams(method);
    const firstParam = params[0];
    const hasContextParam = firstParam && this.isThisParam(firstParam);
    return hasContextParam ? baseCount + 1 : baseCount;
  }

  parseCatchClauseParam() {
    const param = super.parseCatchClauseParam();
    const type = this.tsTryParseTypeAnnotation();

    if (type) {
      param.typeAnnotation = type;
      this.resetEndLocation(param);
    }

    return param;
  }

  tsInAmbientContext(cb) {
    const oldIsAmbientContext = this.state.isAmbientContext;
    this.state.isAmbientContext = true;

    try {
      return cb();
    } finally {
      this.state.isAmbientContext = oldIsAmbientContext;
    }
  }

  parseClass(node, ...args) {
    const oldInAbstractClass = this.state.inAbstractClass;
    this.state.inAbstractClass = !!node.abstract;

    try {
      return super.parseClass(node, ...args);
    } finally {
      this.state.inAbstractClass = oldInAbstractClass;
    }
  }

  tsParseAbstractDeclaration(node) {
    if (this.match(74)) {
      node.abstract = true;
      return this.parseClass(node, true, false);
    } else if (this.isContextual(119)) {
      if (!this.hasFollowingLineBreak()) {
        node.abstract = true;
        this.raise(node.start, TSErrors.NonClassMethodPropertyHasAbstractModifer);
        this.next();
        return this.tsParseInterfaceDeclaration(node);
      }
    } else {
      this.unexpected(null, 74);
    }
  }

  parseMethod(...args) {
    const method = super.parseMethod(...args);

    if (method.abstract) {
      const hasBody = this.hasPlugin("estree") ? !!method.value.body : !!method.body;

      if (hasBody) {
        const {
          key
        } = method;
        this.raise(method.start, TSErrors.AbstractMethodHasImplementation, key.type === "Identifier" && !method.computed ? key.name : `[${this.input.slice(key.start, key.end)}]`);
      }
    }

    return method;
  }

  tsParseTypeParameterName() {
    const typeName = this.parseIdentifier();
    return typeName.name;
  }

  shouldParseAsAmbientContext() {
    return !!this.getPluginOption("typescript", "dts");
  }

  parse() {
    if (this.shouldParseAsAmbientContext()) {
      this.state.isAmbientContext = true;
    }

    return super.parse();
  }

  getExpression() {
    if (this.shouldParseAsAmbientContext()) {
      this.state.isAmbientContext = true;
    }

    return super.getExpression();
  }

  parseExportSpecifier(node, isString, isInTypeExport, isMaybeTypeOnly) {
    if (!isString && isMaybeTypeOnly) {
      this.parseTypeOnlyImportExportSpecifier(node, false, isInTypeExport);
      return this.finishNode(node, "ExportSpecifier");
    }

    node.exportKind = "value";
    return super.parseExportSpecifier(node, isString, isInTypeExport, isMaybeTypeOnly);
  }

  parseImportSpecifier(specifier, importedIsString, isInTypeOnlyImport, isMaybeTypeOnly) {
    if (!importedIsString && isMaybeTypeOnly) {
      this.parseTypeOnlyImportExportSpecifier(specifier, true, isInTypeOnlyImport);
      return this.finishNode(specifier, "ImportSpecifier");
    }

    specifier.importKind = "value";
    return super.parseImportSpecifier(specifier, importedIsString, isInTypeOnlyImport, isMaybeTypeOnly);
  }

  parseTypeOnlyImportExportSpecifier(node, isImport, isInTypeOnlyImportExport) {
    const leftOfAsKey = isImport ? "imported" : "local";
    const rightOfAsKey = isImport ? "local" : "exported";
    let leftOfAs = node[leftOfAsKey];
    let rightOfAs;
    let hasTypeSpecifier = false;
    let canParseAsKeyword = true;
    const pos = leftOfAs.start;

    if (this.isContextual(87)) {
      const firstAs = this.parseIdentifier();

      if (this.isContextual(87)) {
        const secondAs = this.parseIdentifier();

        if (tokenIsKeywordOrIdentifier(this.state.type)) {
          hasTypeSpecifier = true;
          leftOfAs = firstAs;
          rightOfAs = this.parseIdentifier();
          canParseAsKeyword = false;
        } else {
          rightOfAs = secondAs;
          canParseAsKeyword = false;
        }
      } else if (tokenIsKeywordOrIdentifier(this.state.type)) {
        canParseAsKeyword = false;
        rightOfAs = this.parseIdentifier();
      } else {
        hasTypeSpecifier = true;
        leftOfAs = firstAs;
      }
    } else if (tokenIsKeywordOrIdentifier(this.state.type)) {
      hasTypeSpecifier = true;
      leftOfAs = this.parseIdentifier();
    }

    if (hasTypeSpecifier && isInTypeOnlyImportExport) {
      this.raise(pos, isImport ? TSErrors.TypeModifierIsUsedInTypeImports : TSErrors.TypeModifierIsUsedInTypeExports);
    }

    node[leftOfAsKey] = leftOfAs;
    node[rightOfAsKey] = rightOfAs;
    const kindKey = isImport ? "importKind" : "exportKind";
    node[kindKey] = hasTypeSpecifier ? "type" : "value";

    if (canParseAsKeyword && this.eatContextual(87)) {
      node[rightOfAsKey] = isImport ? this.parseIdentifier() : this.parseModuleExportName();
    }

    if (!node[rightOfAsKey]) {
      node[rightOfAsKey] = cloneIdentifier(node[leftOfAsKey]);
    }

    if (isImport) {
      this.checkLVal(node[rightOfAsKey], "import specifier", BIND_LEXICAL);
    }
  }

});

const PlaceHolderErrors = makeErrorTemplates({
  ClassNameIsRequired: "A class name is required."
}, ErrorCodes.SyntaxError);
var placeholders = (superClass => class extends superClass {
  parsePlaceholder(expectedNode) {
    if (this.match(134)) {
      const node = this.startNode();
      this.next();
      this.assertNoSpace("Unexpected space in placeholder.");
      node.name = super.parseIdentifier(true);
      this.assertNoSpace("Unexpected space in placeholder.");
      this.expect(134);
      return this.finishPlaceholder(node, expectedNode);
    }
  }

  finishPlaceholder(node, expectedNode) {
    const isFinished = !!(node.expectedNode && node.type === "Placeholder");
    node.expectedNode = expectedNode;
    return isFinished ? node : this.finishNode(node, "Placeholder");
  }

  getTokenFromCode(code) {
    if (code === 37 && this.input.charCodeAt(this.state.pos + 1) === 37) {
      return this.finishOp(134, 2);
    }

    return super.getTokenFromCode(...arguments);
  }

  parseExprAtom() {
    return this.parsePlaceholder("Expression") || super.parseExprAtom(...arguments);
  }

  parseIdentifier() {
    return this.parsePlaceholder("Identifier") || super.parseIdentifier(...arguments);
  }

  checkReservedWord(word) {
    if (word !== undefined) super.checkReservedWord(...arguments);
  }

  parseBindingAtom() {
    return this.parsePlaceholder("Pattern") || super.parseBindingAtom(...arguments);
  }

  checkLVal(expr) {
    if (expr.type !== "Placeholder") super.checkLVal(...arguments);
  }

  toAssignable(node) {
    if (node && node.type === "Placeholder" && node.expectedNode === "Expression") {
      node.expectedNode = "Pattern";
      return node;
    }

    return super.toAssignable(...arguments);
  }

  isLet(context) {
    if (super.isLet(context)) {
      return true;
    }

    if (!this.isContextual(93)) {
      return false;
    }

    if (context) return false;
    const nextToken = this.lookahead();

    if (nextToken.type === 134) {
      return true;
    }

    return false;
  }

  verifyBreakContinue(node) {
    if (node.label && node.label.type === "Placeholder") return;
    super.verifyBreakContinue(...arguments);
  }

  parseExpressionStatement(node, expr) {
    if (expr.type !== "Placeholder" || expr.extra && expr.extra.parenthesized) {
      return super.parseExpressionStatement(...arguments);
    }

    if (this.match(14)) {
      const stmt = node;
      stmt.label = this.finishPlaceholder(expr, "Identifier");
      this.next();
      stmt.body = this.parseStatement("label");
      return this.finishNode(stmt, "LabeledStatement");
    }

    this.semicolon();
    node.name = expr.name;
    return this.finishPlaceholder(node, "Statement");
  }

  parseBlock() {
    return this.parsePlaceholder("BlockStatement") || super.parseBlock(...arguments);
  }

  parseFunctionId() {
    return this.parsePlaceholder("Identifier") || super.parseFunctionId(...arguments);
  }

  parseClass(node, isStatement, optionalId) {
    const type = isStatement ? "ClassDeclaration" : "ClassExpression";
    this.next();
    this.takeDecorators(node);
    const oldStrict = this.state.strict;
    const placeholder = this.parsePlaceholder("Identifier");

    if (placeholder) {
      if (this.match(75) || this.match(134) || this.match(5)) {
        node.id = placeholder;
      } else if (optionalId || !isStatement) {
        node.id = null;
        node.body = this.finishPlaceholder(placeholder, "ClassBody");
        return this.finishNode(node, type);
      } else {
        this.unexpected(null, PlaceHolderErrors.ClassNameIsRequired);
      }
    } else {
      this.parseClassId(node, isStatement, optionalId);
    }

    this.parseClassSuper(node);
    node.body = this.parsePlaceholder("ClassBody") || this.parseClassBody(!!node.superClass, oldStrict);
    return this.finishNode(node, type);
  }

  parseExport(node) {
    const placeholder = this.parsePlaceholder("Identifier");
    if (!placeholder) return super.parseExport(...arguments);

    if (!this.isContextual(91) && !this.match(12)) {
      node.specifiers = [];
      node.source = null;
      node.declaration = this.finishPlaceholder(placeholder, "Declaration");
      return this.finishNode(node, "ExportNamedDeclaration");
    }

    this.expectPlugin("exportDefaultFrom");
    const specifier = this.startNode();
    specifier.exported = placeholder;
    node.specifiers = [this.finishNode(specifier, "ExportDefaultSpecifier")];
    return super.parseExport(node);
  }

  isExportDefaultSpecifier() {
    if (this.match(59)) {
      const next = this.nextTokenStart();

      if (this.isUnparsedContextual(next, "from")) {
        if (this.input.startsWith(tokenLabelName(134), this.nextTokenStartSince(next + 4))) {
          return true;
        }
      }
    }

    return super.isExportDefaultSpecifier();
  }

  maybeParseExportDefaultSpecifier(node) {
    if (node.specifiers && node.specifiers.length > 0) {
      return true;
    }

    return super.maybeParseExportDefaultSpecifier(...arguments);
  }

  checkExport(node) {
    const {
      specifiers
    } = node;

    if (specifiers != null && specifiers.length) {
      node.specifiers = specifiers.filter(node => node.exported.type === "Placeholder");
    }

    super.checkExport(node);
    node.specifiers = specifiers;
  }

  parseImport(node) {
    const placeholder = this.parsePlaceholder("Identifier");
    if (!placeholder) return super.parseImport(...arguments);
    node.specifiers = [];

    if (!this.isContextual(91) && !this.match(12)) {
      node.source = this.finishPlaceholder(placeholder, "StringLiteral");
      this.semicolon();
      return this.finishNode(node, "ImportDeclaration");
    }

    const specifier = this.startNodeAtNode(placeholder);
    specifier.local = placeholder;
    this.finishNode(specifier, "ImportDefaultSpecifier");
    node.specifiers.push(specifier);

    if (this.eat(12)) {
      const hasStarImport = this.maybeParseStarImportSpecifier(node);
      if (!hasStarImport) this.parseNamedImportSpecifiers(node);
    }

    this.expectContextual(91);
    node.source = this.parseImportSource();
    this.semicolon();
    return this.finishNode(node, "ImportDeclaration");
  }

  parseImportSource() {
    return this.parsePlaceholder("StringLiteral") || super.parseImportSource(...arguments);
  }

});

var v8intrinsic = (superClass => class extends superClass {
  parseV8Intrinsic() {
    if (this.match(48)) {
      const v8IntrinsicStart = this.state.start;
      const node = this.startNode();
      this.next();

      if (tokenIsIdentifier(this.state.type)) {
        const name = this.parseIdentifierName(this.state.start);
        const identifier = this.createIdentifier(node, name);
        identifier.type = "V8IntrinsicIdentifier";

        if (this.match(10)) {
          return identifier;
        }
      }

      this.unexpected(v8IntrinsicStart);
    }
  }

  parseExprAtom() {
    return this.parseV8Intrinsic() || super.parseExprAtom(...arguments);
  }

});

function hasPlugin(plugins, name) {
  return plugins.some(plugin => {
    if (Array.isArray(plugin)) {
      return plugin[0] === name;
    } else {
      return plugin === name;
    }
  });
}
function getPluginOption(plugins, name, option) {
  const plugin = plugins.find(plugin => {
    if (Array.isArray(plugin)) {
      return plugin[0] === name;
    } else {
      return plugin === name;
    }
  });

  if (plugin && Array.isArray(plugin)) {
    return plugin[1][option];
  }

  return null;
}
const PIPELINE_PROPOSALS = ["minimal", "fsharp", "hack", "smart"];
const TOPIC_TOKENS = ["^", "%", "#"];
const RECORD_AND_TUPLE_SYNTAX_TYPES = ["hash", "bar"];
function validatePlugins(plugins) {
  if (hasPlugin(plugins, "decorators")) {
    if (hasPlugin(plugins, "decorators-legacy")) {
      throw new Error("Cannot use the decorators and decorators-legacy plugin together");
    }

    const decoratorsBeforeExport = getPluginOption(plugins, "decorators", "decoratorsBeforeExport");

    if (decoratorsBeforeExport == null) {
      throw new Error("The 'decorators' plugin requires a 'decoratorsBeforeExport' option," + " whose value must be a boolean. If you are migrating from" + " Babylon/Babel 6 or want to use the old decorators proposal, you" + " should use the 'decorators-legacy' plugin instead of 'decorators'.");
    } else if (typeof decoratorsBeforeExport !== "boolean") {
      throw new Error("'decoratorsBeforeExport' must be a boolean.");
    }
  }

  if (hasPlugin(plugins, "flow") && hasPlugin(plugins, "typescript")) {
    throw new Error("Cannot combine flow and typescript plugins.");
  }

  if (hasPlugin(plugins, "placeholders") && hasPlugin(plugins, "v8intrinsic")) {
    throw new Error("Cannot combine placeholders and v8intrinsic plugins.");
  }

  if (hasPlugin(plugins, "pipelineOperator")) {
    const proposal = getPluginOption(plugins, "pipelineOperator", "proposal");

    if (!PIPELINE_PROPOSALS.includes(proposal)) {
      const proposalList = PIPELINE_PROPOSALS.map(p => `"${p}"`).join(", ");
      throw new Error(`"pipelineOperator" requires "proposal" option whose value must be one of: ${proposalList}.`);
    }

    const tupleSyntaxIsHash = hasPlugin(plugins, "recordAndTuple") && getPluginOption(plugins, "recordAndTuple", "syntaxType") === "hash";

    if (proposal === "hack") {
      if (hasPlugin(plugins, "placeholders")) {
        throw new Error("Cannot combine placeholders plugin and Hack-style pipes.");
      }

      if (hasPlugin(plugins, "v8intrinsic")) {
        throw new Error("Cannot combine v8intrinsic plugin and Hack-style pipes.");
      }

      const topicToken = getPluginOption(plugins, "pipelineOperator", "topicToken");

      if (!TOPIC_TOKENS.includes(topicToken)) {
        const tokenList = TOPIC_TOKENS.map(t => `"${t}"`).join(", ");
        throw new Error(`"pipelineOperator" in "proposal": "hack" mode also requires a "topicToken" option whose value must be one of: ${tokenList}.`);
      }

      if (topicToken === "#" && tupleSyntaxIsHash) {
        throw new Error('Plugin conflict between `["pipelineOperator", { proposal: "hack", topicToken: "#" }]` and `["recordAndtuple", { syntaxType: "hash"}]`.');
      }
    } else if (proposal === "smart" && tupleSyntaxIsHash) {
      throw new Error('Plugin conflict between `["pipelineOperator", { proposal: "smart" }]` and `["recordAndtuple", { syntaxType: "hash"}]`.');
    }
  }

  if (hasPlugin(plugins, "moduleAttributes")) {
    {
      if (hasPlugin(plugins, "importAssertions")) {
        throw new Error("Cannot combine importAssertions and moduleAttributes plugins.");
      }

      const moduleAttributesVerionPluginOption = getPluginOption(plugins, "moduleAttributes", "version");

      if (moduleAttributesVerionPluginOption !== "may-2020") {
        throw new Error("The 'moduleAttributes' plugin requires a 'version' option," + " representing the last proposal update. Currently, the" + " only supported value is 'may-2020'.");
      }
    }
  }

  if (hasPlugin(plugins, "recordAndTuple") && !RECORD_AND_TUPLE_SYNTAX_TYPES.includes(getPluginOption(plugins, "recordAndTuple", "syntaxType"))) {
    throw new Error("'recordAndTuple' requires 'syntaxType' option whose value should be one of: " + RECORD_AND_TUPLE_SYNTAX_TYPES.map(p => `'${p}'`).join(", "));
  }

  if (hasPlugin(plugins, "asyncDoExpressions") && !hasPlugin(plugins, "doExpressions")) {
    const error = new Error("'asyncDoExpressions' requires 'doExpressions', please add 'doExpressions' to parser plugins.");
    error.missingPlugins = "doExpressions";
    throw error;
  }
}
const mixinPlugins = {
  estree,
  jsx,
  flow,
  typescript,
  v8intrinsic,
  placeholders
};
const mixinPluginNames = Object.keys(mixinPlugins);

const defaultOptions = {
  sourceType: "script",
  sourceFilename: undefined,
  startColumn: 0,
  startLine: 1,
  allowAwaitOutsideFunction: false,
  allowReturnOutsideFunction: false,
  allowImportExportEverywhere: false,
  allowSuperOutsideMethod: false,
  allowUndeclaredExports: false,
  plugins: [],
  strictMode: null,
  ranges: false,
  tokens: false,
  createParenthesizedExpressions: false,
  errorRecovery: false,
  attachComment: true
};
function getOptions(opts) {
  const options = {};

  for (const key of Object.keys(defaultOptions)) {
    options[key] = opts && opts[key] != null ? opts[key] : defaultOptions[key];
  }

  return options;
}

const unwrapParenthesizedExpression = node => {
  return node.type === "ParenthesizedExpression" ? unwrapParenthesizedExpression(node.expression) : node;
};

class LValParser extends NodeUtils {
  toAssignable(node, isLHS = false) {
    var _node$extra, _node$extra3;

    let parenthesized = undefined;

    if (node.type === "ParenthesizedExpression" || (_node$extra = node.extra) != null && _node$extra.parenthesized) {
      parenthesized = unwrapParenthesizedExpression(node);

      if (isLHS) {
        if (parenthesized.type === "Identifier") {
          this.expressionScope.recordParenthesizedIdentifierError(node.start, ErrorMessages.InvalidParenthesizedAssignment);
        } else if (parenthesized.type !== "MemberExpression") {
          this.raise(node.start, ErrorMessages.InvalidParenthesizedAssignment);
        }
      } else {
        this.raise(node.start, ErrorMessages.InvalidParenthesizedAssignment);
      }
    }

    switch (node.type) {
      case "Identifier":
      case "ObjectPattern":
      case "ArrayPattern":
      case "AssignmentPattern":
      case "RestElement":
        break;

      case "ObjectExpression":
        node.type = "ObjectPattern";

        for (let i = 0, length = node.properties.length, last = length - 1; i < length; i++) {
          var _node$extra2;

          const prop = node.properties[i];
          const isLast = i === last;
          this.toAssignableObjectExpressionProp(prop, isLast, isLHS);

          if (isLast && prop.type === "RestElement" && (_node$extra2 = node.extra) != null && _node$extra2.trailingComma) {
            this.raiseRestNotLast(node.extra.trailingComma);
          }
        }

        break;

      case "ObjectProperty":
        this.toAssignable(node.value, isLHS);
        break;

      case "SpreadElement":
        {
          this.checkToRestConversion(node);
          node.type = "RestElement";
          const arg = node.argument;
          this.toAssignable(arg, isLHS);
          break;
        }

      case "ArrayExpression":
        node.type = "ArrayPattern";
        this.toAssignableList(node.elements, (_node$extra3 = node.extra) == null ? void 0 : _node$extra3.trailingComma, isLHS);
        break;

      case "AssignmentExpression":
        if (node.operator !== "=") {
          this.raise(node.left.end, ErrorMessages.MissingEqInAssignment);
        }

        node.type = "AssignmentPattern";
        delete node.operator;
        this.toAssignable(node.left, isLHS);
        break;

      case "ParenthesizedExpression":
        this.toAssignable(parenthesized, isLHS);
        break;
    }

    return node;
  }

  toAssignableObjectExpressionProp(prop, isLast, isLHS) {
    if (prop.type === "ObjectMethod") {
      const error = prop.kind === "get" || prop.kind === "set" ? ErrorMessages.PatternHasAccessor : ErrorMessages.PatternHasMethod;
      this.raise(prop.key.start, error);
    } else if (prop.type === "SpreadElement" && !isLast) {
      this.raiseRestNotLast(prop.start);
    } else {
      this.toAssignable(prop, isLHS);
    }
  }

  toAssignableList(exprList, trailingCommaPos, isLHS) {
    let end = exprList.length;

    if (end) {
      const last = exprList[end - 1];

      if ((last == null ? void 0 : last.type) === "RestElement") {
        --end;
      } else if ((last == null ? void 0 : last.type) === "SpreadElement") {
        last.type = "RestElement";
        let arg = last.argument;
        this.toAssignable(arg, isLHS);
        arg = unwrapParenthesizedExpression(arg);

        if (arg.type !== "Identifier" && arg.type !== "MemberExpression" && arg.type !== "ArrayPattern" && arg.type !== "ObjectPattern") {
          this.unexpected(arg.start);
        }

        if (trailingCommaPos) {
          this.raiseTrailingCommaAfterRest(trailingCommaPos);
        }

        --end;
      }
    }

    for (let i = 0; i < end; i++) {
      const elt = exprList[i];

      if (elt) {
        this.toAssignable(elt, isLHS);

        if (elt.type === "RestElement") {
          this.raiseRestNotLast(elt.start);
        }
      }
    }

    return exprList;
  }

  isAssignable(node, isBinding) {
    switch (node.type) {
      case "Identifier":
      case "ObjectPattern":
      case "ArrayPattern":
      case "AssignmentPattern":
      case "RestElement":
        return true;

      case "ObjectExpression":
        {
          const last = node.properties.length - 1;
          return node.properties.every((prop, i) => {
            return prop.type !== "ObjectMethod" && (i === last || prop.type !== "SpreadElement") && this.isAssignable(prop);
          });
        }

      case "ObjectProperty":
        return this.isAssignable(node.value);

      case "SpreadElement":
        return this.isAssignable(node.argument);

      case "ArrayExpression":
        return node.elements.every(element => element === null || this.isAssignable(element));

      case "AssignmentExpression":
        return node.operator === "=";

      case "ParenthesizedExpression":
        return this.isAssignable(node.expression);

      case "MemberExpression":
      case "OptionalMemberExpression":
        return !isBinding;

      default:
        return false;
    }
  }

  toReferencedList(exprList, isParenthesizedExpr) {
    return exprList;
  }

  toReferencedListDeep(exprList, isParenthesizedExpr) {
    this.toReferencedList(exprList, isParenthesizedExpr);

    for (const expr of exprList) {
      if ((expr == null ? void 0 : expr.type) === "ArrayExpression") {
        this.toReferencedListDeep(expr.elements);
      }
    }
  }

  parseSpread(refExpressionErrors, refNeedsArrowPos) {
    const node = this.startNode();
    this.next();
    node.argument = this.parseMaybeAssignAllowIn(refExpressionErrors, undefined, refNeedsArrowPos);
    return this.finishNode(node, "SpreadElement");
  }

  parseRestBinding() {
    const node = this.startNode();
    this.next();
    node.argument = this.parseBindingAtom();
    return this.finishNode(node, "RestElement");
  }

  parseBindingAtom() {
    switch (this.state.type) {
      case 0:
        {
          const node = this.startNode();
          this.next();
          node.elements = this.parseBindingList(3, 93, true);
          return this.finishNode(node, "ArrayPattern");
        }

      case 5:
        return this.parseObjectLike(8, true);
    }

    return this.parseIdentifier();
  }

  parseBindingList(close, closeCharCode, allowEmpty, allowModifiers) {
    const elts = [];
    let first = true;

    while (!this.eat(close)) {
      if (first) {
        first = false;
      } else {
        this.expect(12);
      }

      if (allowEmpty && this.match(12)) {
        elts.push(null);
      } else if (this.eat(close)) {
        break;
      } else if (this.match(21)) {
        elts.push(this.parseAssignableListItemTypes(this.parseRestBinding()));
        this.checkCommaAfterRest(closeCharCode);
        this.expect(close);
        break;
      } else {
        const decorators = [];

        if (this.match(24) && this.hasPlugin("decorators")) {
          this.raise(this.state.start, ErrorMessages.UnsupportedParameterDecorator);
        }

        while (this.match(24)) {
          decorators.push(this.parseDecorator());
        }

        elts.push(this.parseAssignableListItem(allowModifiers, decorators));
      }
    }

    return elts;
  }

  parseBindingRestProperty(prop) {
    this.next();
    prop.argument = this.parseIdentifier();
    this.checkCommaAfterRest(125);
    return this.finishNode(prop, "RestElement");
  }

  parseBindingProperty() {
    const prop = this.startNode();
    const {
      type,
      start: startPos,
      startLoc
    } = this.state;

    if (type === 21) {
      return this.parseBindingRestProperty(prop);
    } else {
      this.parsePropertyName(prop);
    }

    prop.method = false;
    this.parseObjPropValue(prop, startPos, startLoc, false, false, true, false);
    return prop;
  }

  parseAssignableListItem(allowModifiers, decorators) {
    const left = this.parseMaybeDefault();
    this.parseAssignableListItemTypes(left);
    const elt = this.parseMaybeDefault(left.start, left.loc.start, left);

    if (decorators.length) {
      left.decorators = decorators;
    }

    return elt;
  }

  parseAssignableListItemTypes(param) {
    return param;
  }

  parseMaybeDefault(startPos, startLoc, left) {
    var _startLoc, _startPos, _left;

    startLoc = (_startLoc = startLoc) != null ? _startLoc : this.state.startLoc;
    startPos = (_startPos = startPos) != null ? _startPos : this.state.start;
    left = (_left = left) != null ? _left : this.parseBindingAtom();
    if (!this.eat(27)) return left;
    const node = this.startNodeAt(startPos, startLoc);
    node.left = left;
    node.right = this.parseMaybeAssignAllowIn();
    return this.finishNode(node, "AssignmentPattern");
  }

  checkLVal(expr, contextDescription, bindingType = BIND_NONE, checkClashes, disallowLetBinding, strictModeChanged = false) {
    switch (expr.type) {
      case "Identifier":
        {
          const {
            name
          } = expr;

          if (this.state.strict && (strictModeChanged ? isStrictBindReservedWord(name, this.inModule) : isStrictBindOnlyReservedWord(name))) {
            this.raise(expr.start, bindingType === BIND_NONE ? ErrorMessages.StrictEvalArguments : ErrorMessages.StrictEvalArgumentsBinding, name);
          }

          if (checkClashes) {
            if (checkClashes.has(name)) {
              this.raise(expr.start, ErrorMessages.ParamDupe);
            } else {
              checkClashes.add(name);
            }
          }

          if (disallowLetBinding && name === "let") {
            this.raise(expr.start, ErrorMessages.LetInLexicalBinding);
          }

          if (!(bindingType & BIND_NONE)) {
            this.scope.declareName(name, bindingType, expr.start);
          }

          break;
        }

      case "MemberExpression":
        if (bindingType !== BIND_NONE) {
          this.raise(expr.start, ErrorMessages.InvalidPropertyBindingPattern);
        }

        break;

      case "ObjectPattern":
        for (let prop of expr.properties) {
          if (this.isObjectProperty(prop)) prop = prop.value;else if (this.isObjectMethod(prop)) continue;
          this.checkLVal(prop, "object destructuring pattern", bindingType, checkClashes, disallowLetBinding);
        }

        break;

      case "ArrayPattern":
        for (const elem of expr.elements) {
          if (elem) {
            this.checkLVal(elem, "array destructuring pattern", bindingType, checkClashes, disallowLetBinding);
          }
        }

        break;

      case "AssignmentPattern":
        this.checkLVal(expr.left, "assignment pattern", bindingType, checkClashes);
        break;

      case "RestElement":
        this.checkLVal(expr.argument, "rest element", bindingType, checkClashes);
        break;

      case "ParenthesizedExpression":
        this.checkLVal(expr.expression, "parenthesized expression", bindingType, checkClashes);
        break;

      default:
        {
          this.raise(expr.start, bindingType === BIND_NONE ? ErrorMessages.InvalidLhs : ErrorMessages.InvalidLhsBinding, contextDescription);
        }
    }
  }

  checkToRestConversion(node) {
    if (node.argument.type !== "Identifier" && node.argument.type !== "MemberExpression") {
      this.raise(node.argument.start, ErrorMessages.InvalidRestAssignmentPattern);
    }
  }

  checkCommaAfterRest(close) {
    if (this.match(12)) {
      if (this.lookaheadCharCode() === close) {
        this.raiseTrailingCommaAfterRest(this.state.start);
      } else {
        this.raiseRestNotLast(this.state.start);
      }
    }
  }

  raiseRestNotLast(pos) {
    throw this.raise(pos, ErrorMessages.ElementAfterRest);
  }

  raiseTrailingCommaAfterRest(pos) {
    this.raise(pos, ErrorMessages.RestTrailingComma);
  }

}

const invalidHackPipeBodies = new Map([["ArrowFunctionExpression", "arrow function"], ["AssignmentExpression", "assignment"], ["ConditionalExpression", "conditional"], ["YieldExpression", "yield"]]);
class ExpressionParser extends LValParser {
  checkProto(prop, isRecord, protoRef, refExpressionErrors) {
    if (prop.type === "SpreadElement" || this.isObjectMethod(prop) || prop.computed || prop.shorthand) {
      return;
    }

    const key = prop.key;
    const name = key.type === "Identifier" ? key.name : key.value;

    if (name === "__proto__") {
      if (isRecord) {
        this.raise(key.start, ErrorMessages.RecordNoProto);
        return;
      }

      if (protoRef.used) {
        if (refExpressionErrors) {
          if (refExpressionErrors.doubleProto === -1) {
            refExpressionErrors.doubleProto = key.start;
          }
        } else {
          this.raise(key.start, ErrorMessages.DuplicateProto);
        }
      }

      protoRef.used = true;
    }
  }

  shouldExitDescending(expr, potentialArrowAt) {
    return expr.type === "ArrowFunctionExpression" && expr.start === potentialArrowAt;
  }

  getExpression() {
    this.enterInitialScopes();
    this.nextToken();
    const expr = this.parseExpression();

    if (!this.match(129)) {
      this.unexpected();
    }

    this.finalizeRemainingComments();
    expr.comments = this.state.comments;
    expr.errors = this.state.errors;

    if (this.options.tokens) {
      expr.tokens = this.tokens;
    }

    return expr;
  }

  parseExpression(disallowIn, refExpressionErrors) {
    if (disallowIn) {
      return this.disallowInAnd(() => this.parseExpressionBase(refExpressionErrors));
    }

    return this.allowInAnd(() => this.parseExpressionBase(refExpressionErrors));
  }

  parseExpressionBase(refExpressionErrors) {
    const startPos = this.state.start;
    const startLoc = this.state.startLoc;
    const expr = this.parseMaybeAssign(refExpressionErrors);

    if (this.match(12)) {
      const node = this.startNodeAt(startPos, startLoc);
      node.expressions = [expr];

      while (this.eat(12)) {
        node.expressions.push(this.parseMaybeAssign(refExpressionErrors));
      }

      this.toReferencedList(node.expressions);
      return this.finishNode(node, "SequenceExpression");
    }

    return expr;
  }

  parseMaybeAssignDisallowIn(refExpressionErrors, afterLeftParse) {
    return this.disallowInAnd(() => this.parseMaybeAssign(refExpressionErrors, afterLeftParse));
  }

  parseMaybeAssignAllowIn(refExpressionErrors, afterLeftParse) {
    return this.allowInAnd(() => this.parseMaybeAssign(refExpressionErrors, afterLeftParse));
  }

  setOptionalParametersError(refExpressionErrors, resultError) {
    var _resultError$pos;

    refExpressionErrors.optionalParameters = (_resultError$pos = resultError == null ? void 0 : resultError.pos) != null ? _resultError$pos : this.state.start;
  }

  parseMaybeAssign(refExpressionErrors, afterLeftParse) {
    const startPos = this.state.start;
    const startLoc = this.state.startLoc;

    if (this.isContextual(99)) {
      if (this.prodParam.hasYield) {
        let left = this.parseYield();

        if (afterLeftParse) {
          left = afterLeftParse.call(this, left, startPos, startLoc);
        }

        return left;
      }
    }

    let ownExpressionErrors;

    if (refExpressionErrors) {
      ownExpressionErrors = false;
    } else {
      refExpressionErrors = new ExpressionErrors();
      ownExpressionErrors = true;
    }

    const {
      type
    } = this.state;

    if (type === 10 || tokenIsIdentifier(type)) {
      this.state.potentialArrowAt = this.state.start;
    }

    let left = this.parseMaybeConditional(refExpressionErrors);

    if (afterLeftParse) {
      left = afterLeftParse.call(this, left, startPos, startLoc);
    }

    if (tokenIsAssignment(this.state.type)) {
      const node = this.startNodeAt(startPos, startLoc);
      const operator = this.state.value;
      node.operator = operator;

      if (this.match(27)) {
        node.left = this.toAssignable(left, true);

        if (refExpressionErrors.doubleProto >= startPos) {
          refExpressionErrors.doubleProto = -1;
        }

        if (refExpressionErrors.shorthandAssign >= startPos) {
          refExpressionErrors.shorthandAssign = -1;
        }
      } else {
        node.left = left;
      }

      this.checkLVal(left, "assignment expression");
      this.next();
      node.right = this.parseMaybeAssign();
      return this.finishNode(node, "AssignmentExpression");
    } else if (ownExpressionErrors) {
      this.checkExpressionErrors(refExpressionErrors, true);
    }

    return left;
  }

  parseMaybeConditional(refExpressionErrors) {
    const startPos = this.state.start;
    const startLoc = this.state.startLoc;
    const potentialArrowAt = this.state.potentialArrowAt;
    const expr = this.parseExprOps(refExpressionErrors);

    if (this.shouldExitDescending(expr, potentialArrowAt)) {
      return expr;
    }

    return this.parseConditional(expr, startPos, startLoc, refExpressionErrors);
  }

  parseConditional(expr, startPos, startLoc, refExpressionErrors) {
    if (this.eat(17)) {
      const node = this.startNodeAt(startPos, startLoc);
      node.test = expr;
      node.consequent = this.parseMaybeAssignAllowIn();
      this.expect(14);
      node.alternate = this.parseMaybeAssign();
      return this.finishNode(node, "ConditionalExpression");
    }

    return expr;
  }

  parseMaybeUnaryOrPrivate(refExpressionErrors) {
    return this.match(128) ? this.parsePrivateName() : this.parseMaybeUnary(refExpressionErrors);
  }

  parseExprOps(refExpressionErrors) {
    const startPos = this.state.start;
    const startLoc = this.state.startLoc;
    const potentialArrowAt = this.state.potentialArrowAt;
    const expr = this.parseMaybeUnaryOrPrivate(refExpressionErrors);

    if (this.shouldExitDescending(expr, potentialArrowAt)) {
      return expr;
    }

    return this.parseExprOp(expr, startPos, startLoc, -1);
  }

  parseExprOp(left, leftStartPos, leftStartLoc, minPrec) {
    if (this.isPrivateName(left)) {
      const value = this.getPrivateNameSV(left);
      const {
        start
      } = left;

      if (minPrec >= tokenOperatorPrecedence(52) || !this.prodParam.hasIn || !this.match(52)) {
        this.raise(start, ErrorMessages.PrivateInExpectedIn, value);
      }

      this.classScope.usePrivateName(value, start);
    }

    const op = this.state.type;

    if (tokenIsOperator(op) && (this.prodParam.hasIn || !this.match(52))) {
      let prec = tokenOperatorPrecedence(op);

      if (prec > minPrec) {
        if (op === 35) {
          this.expectPlugin("pipelineOperator");

          if (this.state.inFSharpPipelineDirectBody) {
            return left;
          }

          this.checkPipelineAtInfixOperator(left, leftStartPos);
        }

        const node = this.startNodeAt(leftStartPos, leftStartLoc);
        node.left = left;
        node.operator = this.state.value;
        const logical = op === 37 || op === 38;
        const coalesce = op === 36;

        if (coalesce) {
          prec = tokenOperatorPrecedence(38);
        }

        this.next();

        if (op === 35 && this.getPluginOption("pipelineOperator", "proposal") === "minimal") {
          if (this.state.type === 90 && this.prodParam.hasAwait) {
            throw this.raise(this.state.start, ErrorMessages.UnexpectedAwaitAfterPipelineBody);
          }
        }

        node.right = this.parseExprOpRightExpr(op, prec);
        this.finishNode(node, logical || coalesce ? "LogicalExpression" : "BinaryExpression");
        const nextOp = this.state.type;

        if (coalesce && (nextOp === 37 || nextOp === 38) || logical && nextOp === 36) {
          throw this.raise(this.state.start, ErrorMessages.MixingCoalesceWithLogical);
        }

        return this.parseExprOp(node, leftStartPos, leftStartLoc, minPrec);
      }
    }

    return left;
  }

  parseExprOpRightExpr(op, prec) {
    const startPos = this.state.start;
    const startLoc = this.state.startLoc;

    switch (op) {
      case 35:
        switch (this.getPluginOption("pipelineOperator", "proposal")) {
          case "hack":
            return this.withTopicBindingContext(() => {
              return this.parseHackPipeBody();
            });

          case "smart":
            return this.withTopicBindingContext(() => {
              if (this.prodParam.hasYield && this.isContextual(99)) {
                throw this.raise(this.state.start, ErrorMessages.PipeBodyIsTighter, this.state.value);
              }

              return this.parseSmartPipelineBodyInStyle(this.parseExprOpBaseRightExpr(op, prec), startPos, startLoc);
            });

          case "fsharp":
            return this.withSoloAwaitPermittingContext(() => {
              return this.parseFSharpPipelineBody(prec);
            });
        }

      default:
        return this.parseExprOpBaseRightExpr(op, prec);
    }
  }

  parseExprOpBaseRightExpr(op, prec) {
    const startPos = this.state.start;
    const startLoc = this.state.startLoc;
    return this.parseExprOp(this.parseMaybeUnaryOrPrivate(), startPos, startLoc, tokenIsRightAssociative(op) ? prec - 1 : prec);
  }

  parseHackPipeBody() {
    var _body$extra;

    const {
      start
    } = this.state;
    const body = this.parseMaybeAssign();

    if (invalidHackPipeBodies.has(body.type) && !((_body$extra = body.extra) != null && _body$extra.parenthesized)) {
      this.raise(start, ErrorMessages.PipeUnparenthesizedBody, invalidHackPipeBodies.get(body.type));
    }

    if (!this.topicReferenceWasUsedInCurrentContext()) {
      this.raise(start, ErrorMessages.PipeTopicUnused);
    }

    return body;
  }

  checkExponentialAfterUnary(node) {
    if (this.match(51)) {
      this.raise(node.argument.start, ErrorMessages.UnexpectedTokenUnaryExponentiation);
    }
  }

  parseMaybeUnary(refExpressionErrors, sawUnary) {
    const startPos = this.state.start;
    const startLoc = this.state.startLoc;
    const isAwait = this.isContextual(90);

    if (isAwait && this.isAwaitAllowed()) {
      this.next();
      const expr = this.parseAwait(startPos, startLoc);
      if (!sawUnary) this.checkExponentialAfterUnary(expr);
      return expr;
    }

    const update = this.match(32);
    const node = this.startNode();

    if (tokenIsPrefix(this.state.type)) {
      node.operator = this.state.value;
      node.prefix = true;

      if (this.match(66)) {
        this.expectPlugin("throwExpressions");
      }

      const isDelete = this.match(83);
      this.next();
      node.argument = this.parseMaybeUnary(null, true);
      this.checkExpressionErrors(refExpressionErrors, true);

      if (this.state.strict && isDelete) {
        const arg = node.argument;

        if (arg.type === "Identifier") {
          this.raise(node.start, ErrorMessages.StrictDelete);
        } else if (this.hasPropertyAsPrivateName(arg)) {
          this.raise(node.start, ErrorMessages.DeletePrivateField);
        }
      }

      if (!update) {
        if (!sawUnary) this.checkExponentialAfterUnary(node);
        return this.finishNode(node, "UnaryExpression");
      }
    }

    const expr = this.parseUpdate(node, update, refExpressionErrors);

    if (isAwait) {
      const {
        type
      } = this.state;
      const startsExpr = this.hasPlugin("v8intrinsic") ? tokenCanStartExpression(type) : tokenCanStartExpression(type) && !this.match(48);

      if (startsExpr && !this.isAmbiguousAwait()) {
        this.raiseOverwrite(startPos, ErrorMessages.AwaitNotInAsyncContext);
        return this.parseAwait(startPos, startLoc);
      }
    }

    return expr;
  }

  parseUpdate(node, update, refExpressionErrors) {
    if (update) {
      this.checkLVal(node.argument, "prefix operation");
      return this.finishNode(node, "UpdateExpression");
    }

    const startPos = this.state.start;
    const startLoc = this.state.startLoc;
    let expr = this.parseExprSubscripts(refExpressionErrors);
    if (this.checkExpressionErrors(refExpressionErrors, false)) return expr;

    while (tokenIsPostfix(this.state.type) && !this.canInsertSemicolon()) {
      const node = this.startNodeAt(startPos, startLoc);
      node.operator = this.state.value;
      node.prefix = false;
      node.argument = expr;
      this.checkLVal(expr, "postfix operation");
      this.next();
      expr = this.finishNode(node, "UpdateExpression");
    }

    return expr;
  }

  parseExprSubscripts(refExpressionErrors) {
    const startPos = this.state.start;
    const startLoc = this.state.startLoc;
    const potentialArrowAt = this.state.potentialArrowAt;
    const expr = this.parseExprAtom(refExpressionErrors);

    if (this.shouldExitDescending(expr, potentialArrowAt)) {
      return expr;
    }

    return this.parseSubscripts(expr, startPos, startLoc);
  }

  parseSubscripts(base, startPos, startLoc, noCalls) {
    const state = {
      optionalChainMember: false,
      maybeAsyncArrow: this.atPossibleAsyncArrow(base),
      stop: false
    };

    do {
      base = this.parseSubscript(base, startPos, startLoc, noCalls, state);
      state.maybeAsyncArrow = false;
    } while (!state.stop);

    return base;
  }

  parseSubscript(base, startPos, startLoc, noCalls, state) {
    if (!noCalls && this.eat(15)) {
      return this.parseBind(base, startPos, startLoc, noCalls, state);
    } else if (this.match(22)) {
      return this.parseTaggedTemplateExpression(base, startPos, startLoc, state);
    }

    let optional = false;

    if (this.match(18)) {
      if (noCalls && this.lookaheadCharCode() === 40) {
        state.stop = true;
        return base;
      }

      state.optionalChainMember = optional = true;
      this.next();
    }

    if (!noCalls && this.match(10)) {
      return this.parseCoverCallAndAsyncArrowHead(base, startPos, startLoc, state, optional);
    } else {
      const computed = this.eat(0);

      if (computed || optional || this.eat(16)) {
        return this.parseMember(base, startPos, startLoc, state, computed, optional);
      } else {
        state.stop = true;
        return base;
      }
    }
  }

  parseMember(base, startPos, startLoc, state, computed, optional) {
    const node = this.startNodeAt(startPos, startLoc);
    node.object = base;
    node.computed = computed;
    const privateName = !computed && this.match(128) && this.state.value;
    const property = computed ? this.parseExpression() : privateName ? this.parsePrivateName() : this.parseIdentifier(true);

    if (privateName !== false) {
      if (node.object.type === "Super") {
        this.raise(startPos, ErrorMessages.SuperPrivateField);
      }

      this.classScope.usePrivateName(privateName, property.start);
    }

    node.property = property;

    if (computed) {
      this.expect(3);
    }

    if (state.optionalChainMember) {
      node.optional = optional;
      return this.finishNode(node, "OptionalMemberExpression");
    } else {
      return this.finishNode(node, "MemberExpression");
    }
  }

  parseBind(base, startPos, startLoc, noCalls, state) {
    const node = this.startNodeAt(startPos, startLoc);
    node.object = base;
    node.callee = this.parseNoCallExpr();
    state.stop = true;
    return this.parseSubscripts(this.finishNode(node, "BindExpression"), startPos, startLoc, noCalls);
  }

  parseCoverCallAndAsyncArrowHead(base, startPos, startLoc, state, optional) {
    const oldMaybeInArrowParameters = this.state.maybeInArrowParameters;
    let refExpressionErrors = null;
    this.state.maybeInArrowParameters = true;
    this.next();
    let node = this.startNodeAt(startPos, startLoc);
    node.callee = base;

    if (state.maybeAsyncArrow) {
      this.expressionScope.enter(newAsyncArrowScope());
      refExpressionErrors = new ExpressionErrors();
    }

    if (state.optionalChainMember) {
      node.optional = optional;
    }

    if (optional) {
      node.arguments = this.parseCallExpressionArguments(11);
    } else {
      node.arguments = this.parseCallExpressionArguments(11, base.type === "Import", base.type !== "Super", node, refExpressionErrors);
    }

    this.finishCallExpression(node, state.optionalChainMember);

    if (state.maybeAsyncArrow && this.shouldParseAsyncArrow() && !optional) {
      state.stop = true;
      this.expressionScope.validateAsPattern();
      this.expressionScope.exit();
      node = this.parseAsyncArrowFromCallExpression(this.startNodeAt(startPos, startLoc), node);
    } else {
      if (state.maybeAsyncArrow) {
        this.checkExpressionErrors(refExpressionErrors, true);
        this.expressionScope.exit();
      }

      this.toReferencedArguments(node);
    }

    this.state.maybeInArrowParameters = oldMaybeInArrowParameters;
    return node;
  }

  toReferencedArguments(node, isParenthesizedExpr) {
    this.toReferencedListDeep(node.arguments, isParenthesizedExpr);
  }

  parseTaggedTemplateExpression(base, startPos, startLoc, state) {
    const node = this.startNodeAt(startPos, startLoc);
    node.tag = base;
    node.quasi = this.parseTemplate(true);

    if (state.optionalChainMember) {
      this.raise(startPos, ErrorMessages.OptionalChainingNoTemplate);
    }

    return this.finishNode(node, "TaggedTemplateExpression");
  }

  atPossibleAsyncArrow(base) {
    return base.type === "Identifier" && base.name === "async" && this.state.lastTokEnd === base.end && !this.canInsertSemicolon() && base.end - base.start === 5 && base.start === this.state.potentialArrowAt;
  }

  finishCallExpression(node, optional) {
    if (node.callee.type === "Import") {
      if (node.arguments.length === 2) {
        {
          if (!this.hasPlugin("moduleAttributes")) {
            this.expectPlugin("importAssertions");
          }
        }
      }

      if (node.arguments.length === 0 || node.arguments.length > 2) {
        this.raise(node.start, ErrorMessages.ImportCallArity, this.hasPlugin("importAssertions") || this.hasPlugin("moduleAttributes") ? "one or two arguments" : "one argument");
      } else {
        for (const arg of node.arguments) {
          if (arg.type === "SpreadElement") {
            this.raise(arg.start, ErrorMessages.ImportCallSpreadArgument);
          }
        }
      }
    }

    return this.finishNode(node, optional ? "OptionalCallExpression" : "CallExpression");
  }

  parseCallExpressionArguments(close, dynamicImport, allowPlaceholder, nodeForExtra, refExpressionErrors) {
    const elts = [];
    let first = true;
    const oldInFSharpPipelineDirectBody = this.state.inFSharpPipelineDirectBody;
    this.state.inFSharpPipelineDirectBody = false;

    while (!this.eat(close)) {
      if (first) {
        first = false;
      } else {
        this.expect(12);

        if (this.match(close)) {
          if (dynamicImport && !this.hasPlugin("importAssertions") && !this.hasPlugin("moduleAttributes")) {
            this.raise(this.state.lastTokStart, ErrorMessages.ImportCallArgumentTrailingComma);
          }

          if (nodeForExtra) {
            this.addExtra(nodeForExtra, "trailingComma", this.state.lastTokStart);
          }

          this.next();
          break;
        }
      }

      elts.push(this.parseExprListItem(false, refExpressionErrors, allowPlaceholder));
    }

    this.state.inFSharpPipelineDirectBody = oldInFSharpPipelineDirectBody;
    return elts;
  }

  shouldParseAsyncArrow() {
    return this.match(19) && !this.canInsertSemicolon();
  }

  parseAsyncArrowFromCallExpression(node, call) {
    var _call$extra;

    this.resetPreviousNodeTrailingComments(call);
    this.expect(19);
    this.parseArrowExpression(node, call.arguments, true, (_call$extra = call.extra) == null ? void 0 : _call$extra.trailingComma);

    if (call.innerComments) {
      setInnerComments(node, call.innerComments);
    }

    if (call.callee.trailingComments) {
      setInnerComments(node, call.callee.trailingComments);
    }

    return node;
  }

  parseNoCallExpr() {
    const startPos = this.state.start;
    const startLoc = this.state.startLoc;
    return this.parseSubscripts(this.parseExprAtom(), startPos, startLoc, true);
  }

  parseExprAtom(refExpressionErrors) {
    let node;
    const {
      type
    } = this.state;

    switch (type) {
      case 73:
        return this.parseSuper();

      case 77:
        node = this.startNode();
        this.next();

        if (this.match(16)) {
          return this.parseImportMetaProperty(node);
        }

        if (!this.match(10)) {
          this.raise(this.state.lastTokStart, ErrorMessages.UnsupportedImport);
        }

        return this.finishNode(node, "Import");

      case 72:
        node = this.startNode();
        this.next();
        return this.finishNode(node, "ThisExpression");

      case 84:
        {
          return this.parseDo(this.startNode(), false);
        }

      case 50:
      case 29:
        {
          this.readRegexp();
          return this.parseRegExpLiteral(this.state.value);
        }

      case 124:
        return this.parseNumericLiteral(this.state.value);

      case 125:
        return this.parseBigIntLiteral(this.state.value);

      case 126:
        return this.parseDecimalLiteral(this.state.value);

      case 123:
        return this.parseStringLiteral(this.state.value);

      case 78:
        return this.parseNullLiteral();

      case 79:
        return this.parseBooleanLiteral(true);

      case 80:
        return this.parseBooleanLiteral(false);

      case 10:
        {
          const canBeArrow = this.state.potentialArrowAt === this.state.start;
          return this.parseParenAndDistinguishExpression(canBeArrow);
        }

      case 2:
      case 1:
        {
          return this.parseArrayLike(this.state.type === 2 ? 4 : 3, false, true);
        }

      case 0:
        {
          return this.parseArrayLike(3, true, false, refExpressionErrors);
        }

      case 6:
      case 7:
        {
          return this.parseObjectLike(this.state.type === 6 ? 9 : 8, false, true);
        }

      case 5:
        {
          return this.parseObjectLike(8, false, false, refExpressionErrors);
        }

      case 62:
        return this.parseFunctionOrFunctionSent();

      case 24:
        this.parseDecorators();

      case 74:
        node = this.startNode();
        this.takeDecorators(node);
        return this.parseClass(node, false);

      case 71:
        return this.parseNewOrNewTarget();

      case 22:
        return this.parseTemplate(false);

      case 15:
        {
          node = this.startNode();
          this.next();
          node.object = null;
          const callee = node.callee = this.parseNoCallExpr();

          if (callee.type === "MemberExpression") {
            return this.finishNode(node, "BindExpression");
          } else {
            throw this.raise(callee.start, ErrorMessages.UnsupportedBind);
          }
        }

      case 128:
        {
          this.raise(this.state.start, ErrorMessages.PrivateInExpectedIn, this.state.value);
          return this.parsePrivateName();
        }

      case 31:
        {
          return this.parseTopicReferenceThenEqualsSign(48, "%");
        }

      case 30:
        {
          return this.parseTopicReferenceThenEqualsSign(40, "^");
        }

      case 40:
      case 48:
      case 25:
        {
          const pipeProposal = this.getPluginOption("pipelineOperator", "proposal");

          if (pipeProposal) {
            return this.parseTopicReference(pipeProposal);
          } else {
            throw this.unexpected();
          }
        }

      case 43:
        {
          const lookaheadCh = this.input.codePointAt(this.nextTokenStart());

          if (isIdentifierStart(lookaheadCh) || lookaheadCh === 62) {
            this.expectOnePlugin(["jsx", "flow", "typescript"]);
            break;
          } else {
            throw this.unexpected();
          }
        }

      default:
        if (tokenIsIdentifier(type)) {
          if (this.isContextual(117) && this.lookaheadCharCode() === 123 && !this.hasFollowingLineBreak()) {
            return this.parseModuleExpression();
          }

          const canBeArrow = this.state.potentialArrowAt === this.state.start;
          const containsEsc = this.state.containsEsc;
          const id = this.parseIdentifier();

          if (!containsEsc && id.name === "async" && !this.canInsertSemicolon()) {
            const {
              type
            } = this.state;

            if (type === 62) {
              this.resetPreviousNodeTrailingComments(id);
              this.next();
              return this.parseFunction(this.startNodeAtNode(id), undefined, true);
            } else if (tokenIsIdentifier(type)) {
              if (this.lookaheadCharCode() === 61) {
                return this.parseAsyncArrowUnaryFunction(this.startNodeAtNode(id));
              } else {
                return id;
              }
            } else if (type === 84) {
              this.resetPreviousNodeTrailingComments(id);
              return this.parseDo(this.startNodeAtNode(id), true);
            }
          }

          if (canBeArrow && this.match(19) && !this.canInsertSemicolon()) {
            this.next();
            return this.parseArrowExpression(this.startNodeAtNode(id), [id], false);
          }

          return id;
        } else {
          throw this.unexpected();
        }

    }
  }

  parseTopicReferenceThenEqualsSign(topicTokenType, topicTokenValue) {
    const pipeProposal = this.getPluginOption("pipelineOperator", "proposal");

    if (pipeProposal) {
      this.state.type = topicTokenType;
      this.state.value = topicTokenValue;
      this.state.pos--;
      this.state.end--;
      this.state.endLoc.column--;
      return this.parseTopicReference(pipeProposal);
    } else {
      throw this.unexpected();
    }
  }

  parseTopicReference(pipeProposal) {
    const node = this.startNode();
    const start = this.state.start;
    const tokenType = this.state.type;
    this.next();
    return this.finishTopicReference(node, start, pipeProposal, tokenType);
  }

  finishTopicReference(node, start, pipeProposal, tokenType) {
    if (this.testTopicReferenceConfiguration(pipeProposal, start, tokenType)) {
      let nodeType;

      if (pipeProposal === "smart") {
        nodeType = "PipelinePrimaryTopicReference";
      } else {
        nodeType = "TopicReference";
      }

      if (!this.topicReferenceIsAllowedInCurrentContext()) {
        if (pipeProposal === "smart") {
          this.raise(start, ErrorMessages.PrimaryTopicNotAllowed);
        } else {
          this.raise(start, ErrorMessages.PipeTopicUnbound);
        }
      }

      this.registerTopicReference();
      return this.finishNode(node, nodeType);
    } else {
      throw this.raise(start, ErrorMessages.PipeTopicUnconfiguredToken, tokenLabelName(tokenType));
    }
  }

  testTopicReferenceConfiguration(pipeProposal, start, tokenType) {
    switch (pipeProposal) {
      case "hack":
        {
          const pluginTopicToken = this.getPluginOption("pipelineOperator", "topicToken");
          return tokenLabelName(tokenType) === pluginTopicToken;
        }

      case "smart":
        return tokenType === 25;

      default:
        throw this.raise(start, ErrorMessages.PipeTopicRequiresHackPipes);
    }
  }

  parseAsyncArrowUnaryFunction(node) {
    this.prodParam.enter(functionFlags(true, this.prodParam.hasYield));
    const params = [this.parseIdentifier()];
    this.prodParam.exit();

    if (this.hasPrecedingLineBreak()) {
      this.raise(this.state.pos, ErrorMessages.LineTerminatorBeforeArrow);
    }

    this.expect(19);
    this.parseArrowExpression(node, params, true);
    return node;
  }

  parseDo(node, isAsync) {
    this.expectPlugin("doExpressions");

    if (isAsync) {
      this.expectPlugin("asyncDoExpressions");
    }

    node.async = isAsync;
    this.next();
    const oldLabels = this.state.labels;
    this.state.labels = [];

    if (isAsync) {
      this.prodParam.enter(PARAM_AWAIT);
      node.body = this.parseBlock();
      this.prodParam.exit();
    } else {
      node.body = this.parseBlock();
    }

    this.state.labels = oldLabels;
    return this.finishNode(node, "DoExpression");
  }

  parseSuper() {
    const node = this.startNode();
    this.next();

    if (this.match(10) && !this.scope.allowDirectSuper && !this.options.allowSuperOutsideMethod) {
      this.raise(node.start, ErrorMessages.SuperNotAllowed);
    } else if (!this.scope.allowSuper && !this.options.allowSuperOutsideMethod) {
      this.raise(node.start, ErrorMessages.UnexpectedSuper);
    }

    if (!this.match(10) && !this.match(0) && !this.match(16)) {
      this.raise(node.start, ErrorMessages.UnsupportedSuper);
    }

    return this.finishNode(node, "Super");
  }

  parsePrivateName() {
    const node = this.startNode();
    const id = this.startNodeAt(this.state.start + 1, new Position(this.state.curLine, this.state.start + 1 - this.state.lineStart));
    const name = this.state.value;
    this.next();
    node.id = this.createIdentifier(id, name);
    return this.finishNode(node, "PrivateName");
  }

  parseFunctionOrFunctionSent() {
    const node = this.startNode();
    this.next();

    if (this.prodParam.hasYield && this.match(16)) {
      const meta = this.createIdentifier(this.startNodeAtNode(node), "function");
      this.next();

      if (this.match(96)) {
        this.expectPlugin("functionSent");
      } else if (!this.hasPlugin("functionSent")) {
        this.unexpected();
      }

      return this.parseMetaProperty(node, meta, "sent");
    }

    return this.parseFunction(node);
  }

  parseMetaProperty(node, meta, propertyName) {
    node.meta = meta;
    const containsEsc = this.state.containsEsc;
    node.property = this.parseIdentifier(true);

    if (node.property.name !== propertyName || containsEsc) {
      this.raise(node.property.start, ErrorMessages.UnsupportedMetaProperty, meta.name, propertyName);
    }

    return this.finishNode(node, "MetaProperty");
  }

  parseImportMetaProperty(node) {
    const id = this.createIdentifier(this.startNodeAtNode(node), "import");
    this.next();

    if (this.isContextual(94)) {
      if (!this.inModule) {
        this.raise(id.start, SourceTypeModuleErrorMessages.ImportMetaOutsideModule);
      }

      this.sawUnambiguousESM = true;
    }

    return this.parseMetaProperty(node, id, "meta");
  }

  parseLiteralAtNode(value, type, node) {
    this.addExtra(node, "rawValue", value);
    this.addExtra(node, "raw", this.input.slice(node.start, this.state.end));
    node.value = value;
    this.next();
    return this.finishNode(node, type);
  }

  parseLiteral(value, type) {
    const node = this.startNode();
    return this.parseLiteralAtNode(value, type, node);
  }

  parseStringLiteral(value) {
    return this.parseLiteral(value, "StringLiteral");
  }

  parseNumericLiteral(value) {
    return this.parseLiteral(value, "NumericLiteral");
  }

  parseBigIntLiteral(value) {
    return this.parseLiteral(value, "BigIntLiteral");
  }

  parseDecimalLiteral(value) {
    return this.parseLiteral(value, "DecimalLiteral");
  }

  parseRegExpLiteral(value) {
    const node = this.parseLiteral(value.value, "RegExpLiteral");
    node.pattern = value.pattern;
    node.flags = value.flags;
    return node;
  }

  parseBooleanLiteral(value) {
    const node = this.startNode();
    node.value = value;
    this.next();
    return this.finishNode(node, "BooleanLiteral");
  }

  parseNullLiteral() {
    const node = this.startNode();
    this.next();
    return this.finishNode(node, "NullLiteral");
  }

  parseParenAndDistinguishExpression(canBeArrow) {
    const startPos = this.state.start;
    const startLoc = this.state.startLoc;
    let val;
    this.next();
    this.expressionScope.enter(newArrowHeadScope());
    const oldMaybeInArrowParameters = this.state.maybeInArrowParameters;
    const oldInFSharpPipelineDirectBody = this.state.inFSharpPipelineDirectBody;
    this.state.maybeInArrowParameters = true;
    this.state.inFSharpPipelineDirectBody = false;
    const innerStartPos = this.state.start;
    const innerStartLoc = this.state.startLoc;
    const exprList = [];
    const refExpressionErrors = new ExpressionErrors();
    let first = true;
    let spreadStart;
    let optionalCommaStart;

    while (!this.match(11)) {
      if (first) {
        first = false;
      } else {
        this.expect(12, refExpressionErrors.optionalParameters === -1 ? null : refExpressionErrors.optionalParameters);

        if (this.match(11)) {
          optionalCommaStart = this.state.start;
          break;
        }
      }

      if (this.match(21)) {
        const spreadNodeStartPos = this.state.start;
        const spreadNodeStartLoc = this.state.startLoc;
        spreadStart = this.state.start;
        exprList.push(this.parseParenItem(this.parseRestBinding(), spreadNodeStartPos, spreadNodeStartLoc));
        this.checkCommaAfterRest(41);
        break;
      } else {
        exprList.push(this.parseMaybeAssignAllowIn(refExpressionErrors, this.parseParenItem));
      }
    }

    const innerEndPos = this.state.lastTokEnd;
    const innerEndLoc = this.state.lastTokEndLoc;
    this.expect(11);
    this.state.maybeInArrowParameters = oldMaybeInArrowParameters;
    this.state.inFSharpPipelineDirectBody = oldInFSharpPipelineDirectBody;
    let arrowNode = this.startNodeAt(startPos, startLoc);

    if (canBeArrow && this.shouldParseArrow(exprList) && (arrowNode = this.parseArrow(arrowNode))) {
      this.expressionScope.validateAsPattern();
      this.expressionScope.exit();
      this.parseArrowExpression(arrowNode, exprList, false);
      return arrowNode;
    }

    this.expressionScope.exit();

    if (!exprList.length) {
      this.unexpected(this.state.lastTokStart);
    }

    if (optionalCommaStart) this.unexpected(optionalCommaStart);
    if (spreadStart) this.unexpected(spreadStart);
    this.checkExpressionErrors(refExpressionErrors, true);
    this.toReferencedListDeep(exprList, true);

    if (exprList.length > 1) {
      val = this.startNodeAt(innerStartPos, innerStartLoc);
      val.expressions = exprList;
      this.finishNode(val, "SequenceExpression");
      this.resetEndLocation(val, innerEndPos, innerEndLoc);
    } else {
      val = exprList[0];
    }

    if (!this.options.createParenthesizedExpressions) {
      this.addExtra(val, "parenthesized", true);
      this.addExtra(val, "parenStart", startPos);
      this.takeSurroundingComments(val, startPos, this.state.lastTokEnd);
      return val;
    }

    const parenExpression = this.startNodeAt(startPos, startLoc);
    parenExpression.expression = val;
    this.finishNode(parenExpression, "ParenthesizedExpression");
    return parenExpression;
  }

  shouldParseArrow(params) {
    return !this.canInsertSemicolon();
  }

  parseArrow(node) {
    if (this.eat(19)) {
      return node;
    }
  }

  parseParenItem(node, startPos, startLoc) {
    return node;
  }

  parseNewOrNewTarget() {
    const node = this.startNode();
    this.next();

    if (this.match(16)) {
      const meta = this.createIdentifier(this.startNodeAtNode(node), "new");
      this.next();
      const metaProp = this.parseMetaProperty(node, meta, "target");

      if (!this.scope.inNonArrowFunction && !this.scope.inClass) {
        this.raise(metaProp.start, ErrorMessages.UnexpectedNewTarget);
      }

      return metaProp;
    }

    return this.parseNew(node);
  }

  parseNew(node) {
    node.callee = this.parseNoCallExpr();

    if (node.callee.type === "Import") {
      this.raise(node.callee.start, ErrorMessages.ImportCallNotNewExpression);
    } else if (this.isOptionalChain(node.callee)) {
      this.raise(this.state.lastTokEnd, ErrorMessages.OptionalChainingNoNew);
    } else if (this.eat(18)) {
      this.raise(this.state.start, ErrorMessages.OptionalChainingNoNew);
    }

    this.parseNewArguments(node);
    return this.finishNode(node, "NewExpression");
  }

  parseNewArguments(node) {
    if (this.eat(10)) {
      const args = this.parseExprList(11);
      this.toReferencedList(args);
      node.arguments = args;
    } else {
      node.arguments = [];
    }
  }

  parseTemplateElement(isTagged) {
    const elem = this.startNode();

    if (this.state.value === null) {
      if (!isTagged) {
        this.raise(this.state.start + 1, ErrorMessages.InvalidEscapeSequenceTemplate);
      }
    }

    elem.value = {
      raw: this.input.slice(this.state.start, this.state.end).replace(/\r\n?/g, "\n"),
      cooked: this.state.value
    };
    this.next();
    elem.tail = this.match(22);
    return this.finishNode(elem, "TemplateElement");
  }

  parseTemplate(isTagged) {
    const node = this.startNode();
    this.next();
    node.expressions = [];
    let curElt = this.parseTemplateElement(isTagged);
    node.quasis = [curElt];

    while (!curElt.tail) {
      this.expect(23);
      node.expressions.push(this.parseTemplateSubstitution());
      this.expect(8);
      node.quasis.push(curElt = this.parseTemplateElement(isTagged));
    }

    this.next();
    return this.finishNode(node, "TemplateLiteral");
  }

  parseTemplateSubstitution() {
    return this.parseExpression();
  }

  parseObjectLike(close, isPattern, isRecord, refExpressionErrors) {
    if (isRecord) {
      this.expectPlugin("recordAndTuple");
    }

    const oldInFSharpPipelineDirectBody = this.state.inFSharpPipelineDirectBody;
    this.state.inFSharpPipelineDirectBody = false;
    const propHash = Object.create(null);
    let first = true;
    const node = this.startNode();
    node.properties = [];
    this.next();

    while (!this.match(close)) {
      if (first) {
        first = false;
      } else {
        this.expect(12);

        if (this.match(close)) {
          this.addExtra(node, "trailingComma", this.state.lastTokStart);
          break;
        }
      }

      let prop;

      if (isPattern) {
        prop = this.parseBindingProperty();
      } else {
        prop = this.parsePropertyDefinition(refExpressionErrors);
        this.checkProto(prop, isRecord, propHash, refExpressionErrors);
      }

      if (isRecord && !this.isObjectProperty(prop) && prop.type !== "SpreadElement") {
        this.raise(prop.start, ErrorMessages.InvalidRecordProperty);
      }

      if (prop.shorthand) {
        this.addExtra(prop, "shorthand", true);
      }

      node.properties.push(prop);
    }

    this.next();
    this.state.inFSharpPipelineDirectBody = oldInFSharpPipelineDirectBody;
    let type = "ObjectExpression";

    if (isPattern) {
      type = "ObjectPattern";
    } else if (isRecord) {
      type = "RecordExpression";
    }

    return this.finishNode(node, type);
  }

  maybeAsyncOrAccessorProp(prop) {
    return !prop.computed && prop.key.type === "Identifier" && (this.isLiteralPropertyName() || this.match(0) || this.match(49));
  }

  parsePropertyDefinition(refExpressionErrors) {
    let decorators = [];

    if (this.match(24)) {
      if (this.hasPlugin("decorators")) {
        this.raise(this.state.start, ErrorMessages.UnsupportedPropertyDecorator);
      }

      while (this.match(24)) {
        decorators.push(this.parseDecorator());
      }
    }

    const prop = this.startNode();
    let isAsync = false;
    let isAccessor = false;
    let startPos;
    let startLoc;

    if (this.match(21)) {
      if (decorators.length) this.unexpected();
      return this.parseSpread();
    }

    if (decorators.length) {
      prop.decorators = decorators;
      decorators = [];
    }

    prop.method = false;

    if (refExpressionErrors) {
      startPos = this.state.start;
      startLoc = this.state.startLoc;
    }

    let isGenerator = this.eat(49);
    this.parsePropertyNamePrefixOperator(prop);
    const containsEsc = this.state.containsEsc;
    const key = this.parsePropertyName(prop);

    if (!isGenerator && !containsEsc && this.maybeAsyncOrAccessorProp(prop)) {
      const keyName = key.name;

      if (keyName === "async" && !this.hasPrecedingLineBreak()) {
        isAsync = true;
        this.resetPreviousNodeTrailingComments(key);
        isGenerator = this.eat(49);
        this.parsePropertyName(prop);
      }

      if (keyName === "get" || keyName === "set") {
        isAccessor = true;
        this.resetPreviousNodeTrailingComments(key);
        prop.kind = keyName;

        if (this.match(49)) {
          isGenerator = true;
          this.raise(this.state.pos, ErrorMessages.AccessorIsGenerator, keyName);
          this.next();
        }

        this.parsePropertyName(prop);
      }
    }

    this.parseObjPropValue(prop, startPos, startLoc, isGenerator, isAsync, false, isAccessor, refExpressionErrors);
    return prop;
  }

  getGetterSetterExpectedParamCount(method) {
    return method.kind === "get" ? 0 : 1;
  }

  getObjectOrClassMethodParams(method) {
    return method.params;
  }

  checkGetterSetterParams(method) {
    var _params;

    const paramCount = this.getGetterSetterExpectedParamCount(method);
    const params = this.getObjectOrClassMethodParams(method);
    const start = method.start;

    if (params.length !== paramCount) {
      if (method.kind === "get") {
        this.raise(start, ErrorMessages.BadGetterArity);
      } else {
        this.raise(start, ErrorMessages.BadSetterArity);
      }
    }

    if (method.kind === "set" && ((_params = params[params.length - 1]) == null ? void 0 : _params.type) === "RestElement") {
      this.raise(start, ErrorMessages.BadSetterRestParameter);
    }
  }

  parseObjectMethod(prop, isGenerator, isAsync, isPattern, isAccessor) {
    if (isAccessor) {
      this.parseMethod(prop, isGenerator, false, false, false, "ObjectMethod");
      this.checkGetterSetterParams(prop);
      return prop;
    }

    if (isAsync || isGenerator || this.match(10)) {
      if (isPattern) this.unexpected();
      prop.kind = "method";
      prop.method = true;
      return this.parseMethod(prop, isGenerator, isAsync, false, false, "ObjectMethod");
    }
  }

  parseObjectProperty(prop, startPos, startLoc, isPattern, refExpressionErrors) {
    prop.shorthand = false;

    if (this.eat(14)) {
      prop.value = isPattern ? this.parseMaybeDefault(this.state.start, this.state.startLoc) : this.parseMaybeAssignAllowIn(refExpressionErrors);
      return this.finishNode(prop, "ObjectProperty");
    }

    if (!prop.computed && prop.key.type === "Identifier") {
      this.checkReservedWord(prop.key.name, prop.key.start, true, false);

      if (isPattern) {
        prop.value = this.parseMaybeDefault(startPos, startLoc, cloneIdentifier(prop.key));
      } else if (this.match(27) && refExpressionErrors) {
        if (refExpressionErrors.shorthandAssign === -1) {
          refExpressionErrors.shorthandAssign = this.state.start;
        }

        prop.value = this.parseMaybeDefault(startPos, startLoc, cloneIdentifier(prop.key));
      } else {
        prop.value = cloneIdentifier(prop.key);
      }

      prop.shorthand = true;
      return this.finishNode(prop, "ObjectProperty");
    }
  }

  parseObjPropValue(prop, startPos, startLoc, isGenerator, isAsync, isPattern, isAccessor, refExpressionErrors) {
    const node = this.parseObjectMethod(prop, isGenerator, isAsync, isPattern, isAccessor) || this.parseObjectProperty(prop, startPos, startLoc, isPattern, refExpressionErrors);
    if (!node) this.unexpected();
    return node;
  }

  parsePropertyName(prop) {
    if (this.eat(0)) {
      prop.computed = true;
      prop.key = this.parseMaybeAssignAllowIn();
      this.expect(3);
    } else {
      const {
        type,
        value
      } = this.state;
      let key;

      if (tokenIsKeywordOrIdentifier(type)) {
        key = this.parseIdentifier(true);
      } else {
        switch (type) {
          case 124:
            key = this.parseNumericLiteral(value);
            break;

          case 123:
            key = this.parseStringLiteral(value);
            break;

          case 125:
            key = this.parseBigIntLiteral(value);
            break;

          case 126:
            key = this.parseDecimalLiteral(value);
            break;

          case 128:
            {
              const privateKeyPos = this.state.start + 1;
              this.raise(privateKeyPos, ErrorMessages.UnexpectedPrivateField);
              key = this.parsePrivateName();
              break;
            }

          default:
            throw this.unexpected();
        }
      }

      prop.key = key;

      if (type !== 128) {
        prop.computed = false;
      }
    }

    return prop.key;
  }

  initFunction(node, isAsync) {
    node.id = null;
    node.generator = false;
    node.async = !!isAsync;
  }

  parseMethod(node, isGenerator, isAsync, isConstructor, allowDirectSuper, type, inClassScope = false) {
    this.initFunction(node, isAsync);
    node.generator = !!isGenerator;
    const allowModifiers = isConstructor;
    this.scope.enter(SCOPE_FUNCTION | SCOPE_SUPER | (inClassScope ? SCOPE_CLASS : 0) | (allowDirectSuper ? SCOPE_DIRECT_SUPER : 0));
    this.prodParam.enter(functionFlags(isAsync, node.generator));
    this.parseFunctionParams(node, allowModifiers);
    this.parseFunctionBodyAndFinish(node, type, true);
    this.prodParam.exit();
    this.scope.exit();
    return node;
  }

  parseArrayLike(close, canBePattern, isTuple, refExpressionErrors) {
    if (isTuple) {
      this.expectPlugin("recordAndTuple");
    }

    const oldInFSharpPipelineDirectBody = this.state.inFSharpPipelineDirectBody;
    this.state.inFSharpPipelineDirectBody = false;
    const node = this.startNode();
    this.next();
    node.elements = this.parseExprList(close, !isTuple, refExpressionErrors, node);
    this.state.inFSharpPipelineDirectBody = oldInFSharpPipelineDirectBody;
    return this.finishNode(node, isTuple ? "TupleExpression" : "ArrayExpression");
  }

  parseArrowExpression(node, params, isAsync, trailingCommaPos) {
    this.scope.enter(SCOPE_FUNCTION | SCOPE_ARROW);
    let flags = functionFlags(isAsync, false);

    if (!this.match(0) && this.prodParam.hasIn) {
      flags |= PARAM_IN;
    }

    this.prodParam.enter(flags);
    this.initFunction(node, isAsync);
    const oldMaybeInArrowParameters = this.state.maybeInArrowParameters;

    if (params) {
      this.state.maybeInArrowParameters = true;
      this.setArrowFunctionParameters(node, params, trailingCommaPos);
    }

    this.state.maybeInArrowParameters = false;
    this.parseFunctionBody(node, true);
    this.prodParam.exit();
    this.scope.exit();
    this.state.maybeInArrowParameters = oldMaybeInArrowParameters;
    return this.finishNode(node, "ArrowFunctionExpression");
  }

  setArrowFunctionParameters(node, params, trailingCommaPos) {
    node.params = this.toAssignableList(params, trailingCommaPos, false);
  }

  parseFunctionBodyAndFinish(node, type, isMethod = false) {
    this.parseFunctionBody(node, false, isMethod);
    this.finishNode(node, type);
  }

  parseFunctionBody(node, allowExpression, isMethod = false) {
    const isExpression = allowExpression && !this.match(5);
    this.expressionScope.enter(newExpressionScope());

    if (isExpression) {
      node.body = this.parseMaybeAssign();
      this.checkParams(node, false, allowExpression, false);
    } else {
      const oldStrict = this.state.strict;
      const oldLabels = this.state.labels;
      this.state.labels = [];
      this.prodParam.enter(this.prodParam.currentFlags() | PARAM_RETURN);
      node.body = this.parseBlock(true, false, hasStrictModeDirective => {
        const nonSimple = !this.isSimpleParamList(node.params);

        if (hasStrictModeDirective && nonSimple) {
          const errorPos = (node.kind === "method" || node.kind === "constructor") && !!node.key ? node.key.end : node.start;
          this.raise(errorPos, ErrorMessages.IllegalLanguageModeDirective);
        }

        const strictModeChanged = !oldStrict && this.state.strict;
        this.checkParams(node, !this.state.strict && !allowExpression && !isMethod && !nonSimple, allowExpression, strictModeChanged);

        if (this.state.strict && node.id) {
          this.checkLVal(node.id, "function name", BIND_OUTSIDE, undefined, undefined, strictModeChanged);
        }
      });
      this.prodParam.exit();
      this.state.labels = oldLabels;
    }

    this.expressionScope.exit();
  }

  isSimpleParamList(params) {
    for (let i = 0, len = params.length; i < len; i++) {
      if (params[i].type !== "Identifier") return false;
    }

    return true;
  }

  checkParams(node, allowDuplicates, isArrowFunction, strictModeChanged = true) {
    const checkClashes = new Set();

    for (const param of node.params) {
      this.checkLVal(param, "function parameter list", BIND_VAR, allowDuplicates ? null : checkClashes, undefined, strictModeChanged);
    }
  }

  parseExprList(close, allowEmpty, refExpressionErrors, nodeForExtra) {
    const elts = [];
    let first = true;

    while (!this.eat(close)) {
      if (first) {
        first = false;
      } else {
        this.expect(12);

        if (this.match(close)) {
          if (nodeForExtra) {
            this.addExtra(nodeForExtra, "trailingComma", this.state.lastTokStart);
          }

          this.next();
          break;
        }
      }

      elts.push(this.parseExprListItem(allowEmpty, refExpressionErrors));
    }

    return elts;
  }

  parseExprListItem(allowEmpty, refExpressionErrors, allowPlaceholder) {
    let elt;

    if (this.match(12)) {
      if (!allowEmpty) {
        this.raise(this.state.pos, ErrorMessages.UnexpectedToken, ",");
      }

      elt = null;
    } else if (this.match(21)) {
      const spreadNodeStartPos = this.state.start;
      const spreadNodeStartLoc = this.state.startLoc;
      elt = this.parseParenItem(this.parseSpread(refExpressionErrors), spreadNodeStartPos, spreadNodeStartLoc);
    } else if (this.match(17)) {
      this.expectPlugin("partialApplication");

      if (!allowPlaceholder) {
        this.raise(this.state.start, ErrorMessages.UnexpectedArgumentPlaceholder);
      }

      const node = this.startNode();
      this.next();
      elt = this.finishNode(node, "ArgumentPlaceholder");
    } else {
      elt = this.parseMaybeAssignAllowIn(refExpressionErrors, this.parseParenItem);
    }

    return elt;
  }

  parseIdentifier(liberal) {
    const node = this.startNode();
    const name = this.parseIdentifierName(node.start, liberal);
    return this.createIdentifier(node, name);
  }

  createIdentifier(node, name) {
    node.name = name;
    node.loc.identifierName = name;
    return this.finishNode(node, "Identifier");
  }

  parseIdentifierName(pos, liberal) {
    let name;
    const {
      start,
      type
    } = this.state;

    if (tokenIsKeywordOrIdentifier(type)) {
      name = this.state.value;
    } else {
      throw this.unexpected();
    }

    const tokenIsKeyword = tokenKeywordOrIdentifierIsKeyword(type);

    if (liberal) {
      if (tokenIsKeyword) {
        this.replaceToken(122);
      }
    } else {
      this.checkReservedWord(name, start, tokenIsKeyword, false);
    }

    this.next();
    return name;
  }

  checkReservedWord(word, startLoc, checkKeywords, isBinding) {
    if (word.length > 10) {
      return;
    }

    if (!canBeReservedWord(word)) {
      return;
    }

    if (word === "yield") {
      if (this.prodParam.hasYield) {
        this.raise(startLoc, ErrorMessages.YieldBindingIdentifier);
        return;
      }
    } else if (word === "await") {
      if (this.prodParam.hasAwait) {
        this.raise(startLoc, ErrorMessages.AwaitBindingIdentifier);
        return;
      } else if (this.scope.inStaticBlock) {
        this.raise(startLoc, ErrorMessages.AwaitBindingIdentifierInStaticBlock);
        return;
      } else {
        this.expressionScope.recordAsyncArrowParametersError(startLoc, ErrorMessages.AwaitBindingIdentifier);
      }
    } else if (word === "arguments") {
      if (this.scope.inClassAndNotInNonArrowFunction) {
        this.raise(startLoc, ErrorMessages.ArgumentsInClass);
        return;
      }
    }

    if (checkKeywords && isKeyword(word)) {
      this.raise(startLoc, ErrorMessages.UnexpectedKeyword, word);
      return;
    }

    const reservedTest = !this.state.strict ? isReservedWord : isBinding ? isStrictBindReservedWord : isStrictReservedWord;

    if (reservedTest(word, this.inModule)) {
      this.raise(startLoc, ErrorMessages.UnexpectedReservedWord, word);
    }
  }

  isAwaitAllowed() {
    if (this.prodParam.hasAwait) return true;

    if (this.options.allowAwaitOutsideFunction && !this.scope.inFunction) {
      return true;
    }

    return false;
  }

  parseAwait(startPos, startLoc) {
    const node = this.startNodeAt(startPos, startLoc);
    this.expressionScope.recordParameterInitializerError(node.start, ErrorMessages.AwaitExpressionFormalParameter);

    if (this.eat(49)) {
      this.raise(node.start, ErrorMessages.ObsoleteAwaitStar);
    }

    if (!this.scope.inFunction && !this.options.allowAwaitOutsideFunction) {
      if (this.isAmbiguousAwait()) {
        this.ambiguousScriptDifferentAst = true;
      } else {
        this.sawUnambiguousESM = true;
      }
    }

    if (!this.state.soloAwait) {
      node.argument = this.parseMaybeUnary(null, true);
    }

    return this.finishNode(node, "AwaitExpression");
  }

  isAmbiguousAwait() {
    return this.hasPrecedingLineBreak() || this.match(47) || this.match(10) || this.match(0) || this.match(22) || this.match(127) || this.match(50) || this.hasPlugin("v8intrinsic") && this.match(48);
  }

  parseYield() {
    const node = this.startNode();
    this.expressionScope.recordParameterInitializerError(node.start, ErrorMessages.YieldInParameter);
    this.next();
    let delegating = false;
    let argument = null;

    if (!this.hasPrecedingLineBreak()) {
      delegating = this.eat(49);

      switch (this.state.type) {
        case 13:
        case 129:
        case 8:
        case 11:
        case 3:
        case 9:
        case 14:
        case 12:
          if (!delegating) break;

        default:
          argument = this.parseMaybeAssign();
      }
    }

    node.delegate = delegating;
    node.argument = argument;
    return this.finishNode(node, "YieldExpression");
  }

  checkPipelineAtInfixOperator(left, leftStartPos) {
    if (this.getPluginOption("pipelineOperator", "proposal") === "smart") {
      if (left.type === "SequenceExpression") {
        this.raise(leftStartPos, ErrorMessages.PipelineHeadSequenceExpression);
      }
    }
  }

  checkHackPipeBodyEarlyErrors(startPos) {
    if (!this.topicReferenceWasUsedInCurrentContext()) {
      this.raise(startPos, ErrorMessages.PipeTopicUnused);
    }
  }

  parseSmartPipelineBodyInStyle(childExpr, startPos, startLoc) {
    const bodyNode = this.startNodeAt(startPos, startLoc);

    if (this.isSimpleReference(childExpr)) {
      bodyNode.callee = childExpr;
      return this.finishNode(bodyNode, "PipelineBareFunction");
    } else {
      this.checkSmartPipeTopicBodyEarlyErrors(startPos);
      bodyNode.expression = childExpr;
      return this.finishNode(bodyNode, "PipelineTopicExpression");
    }
  }

  isSimpleReference(expression) {
    switch (expression.type) {
      case "MemberExpression":
        return !expression.computed && this.isSimpleReference(expression.object);

      case "Identifier":
        return true;

      default:
        return false;
    }
  }

  checkSmartPipeTopicBodyEarlyErrors(startPos) {
    if (this.match(19)) {
      throw this.raise(this.state.start, ErrorMessages.PipelineBodyNoArrow);
    } else if (!this.topicReferenceWasUsedInCurrentContext()) {
      this.raise(startPos, ErrorMessages.PipelineTopicUnused);
    }
  }

  withTopicBindingContext(callback) {
    const outerContextTopicState = this.state.topicContext;
    this.state.topicContext = {
      maxNumOfResolvableTopics: 1,
      maxTopicIndex: null
    };

    try {
      return callback();
    } finally {
      this.state.topicContext = outerContextTopicState;
    }
  }

  withSmartMixTopicForbiddingContext(callback) {
    const proposal = this.getPluginOption("pipelineOperator", "proposal");

    if (proposal === "smart") {
      const outerContextTopicState = this.state.topicContext;
      this.state.topicContext = {
        maxNumOfResolvableTopics: 0,
        maxTopicIndex: null
      };

      try {
        return callback();
      } finally {
        this.state.topicContext = outerContextTopicState;
      }
    } else {
      return callback();
    }
  }

  withSoloAwaitPermittingContext(callback) {
    const outerContextSoloAwaitState = this.state.soloAwait;
    this.state.soloAwait = true;

    try {
      return callback();
    } finally {
      this.state.soloAwait = outerContextSoloAwaitState;
    }
  }

  allowInAnd(callback) {
    const flags = this.prodParam.currentFlags();
    const prodParamToSet = PARAM_IN & ~flags;

    if (prodParamToSet) {
      this.prodParam.enter(flags | PARAM_IN);

      try {
        return callback();
      } finally {
        this.prodParam.exit();
      }
    }

    return callback();
  }

  disallowInAnd(callback) {
    const flags = this.prodParam.currentFlags();
    const prodParamToClear = PARAM_IN & flags;

    if (prodParamToClear) {
      this.prodParam.enter(flags & ~PARAM_IN);

      try {
        return callback();
      } finally {
        this.prodParam.exit();
      }
    }

    return callback();
  }

  registerTopicReference() {
    this.state.topicContext.maxTopicIndex = 0;
  }

  topicReferenceIsAllowedInCurrentContext() {
    return this.state.topicContext.maxNumOfResolvableTopics >= 1;
  }

  topicReferenceWasUsedInCurrentContext() {
    return this.state.topicContext.maxTopicIndex != null && this.state.topicContext.maxTopicIndex >= 0;
  }

  parseFSharpPipelineBody(prec) {
    const startPos = this.state.start;
    const startLoc = this.state.startLoc;
    this.state.potentialArrowAt = this.state.start;
    const oldInFSharpPipelineDirectBody = this.state.inFSharpPipelineDirectBody;
    this.state.inFSharpPipelineDirectBody = true;
    const ret = this.parseExprOp(this.parseMaybeUnaryOrPrivate(), startPos, startLoc, prec);
    this.state.inFSharpPipelineDirectBody = oldInFSharpPipelineDirectBody;
    return ret;
  }

  parseModuleExpression() {
    this.expectPlugin("moduleBlocks");
    const node = this.startNode();
    this.next();
    this.eat(5);
    const revertScopes = this.initializeScopes(true);
    this.enterInitialScopes();
    const program = this.startNode();

    try {
      node.body = this.parseProgram(program, 8, "module");
    } finally {
      revertScopes();
    }

    this.eat(8);
    return this.finishNode(node, "ModuleExpression");
  }

  parsePropertyNamePrefixOperator(prop) {}

}

const loopLabel = {
  kind: "loop"
},
      switchLabel = {
  kind: "switch"
};
const FUNC_NO_FLAGS = 0b000,
      FUNC_STATEMENT = 0b001,
      FUNC_HANGING_STATEMENT = 0b010,
      FUNC_NULLABLE_ID = 0b100;
const loneSurrogate = /[\uD800-\uDFFF]/u;
const keywordRelationalOperator = /in(?:stanceof)?/y;

function babel7CompatTokens(tokens) {
  for (let i = 0; i < tokens.length; i++) {
    const token = tokens[i];
    const {
      type
    } = token;

    if (type === 128) {
      {
        const {
          loc,
          start,
          value,
          end
        } = token;
        const hashEndPos = start + 1;
        const hashEndLoc = new Position(loc.start.line, loc.start.column + 1);
        tokens.splice(i, 1, new Token({
          type: getExportedToken(25),
          value: "#",
          start: start,
          end: hashEndPos,
          startLoc: loc.start,
          endLoc: hashEndLoc
        }), new Token({
          type: getExportedToken(122),
          value: value,
          start: hashEndPos,
          end: end,
          startLoc: hashEndLoc,
          endLoc: loc.end
        }));
        i++;
        continue;
      }
    }

    if (typeof type === "number") {
      token.type = getExportedToken(type);
    }
  }

  return tokens;
}

class StatementParser extends ExpressionParser {
  parseTopLevel(file, program) {
    file.program = this.parseProgram(program);
    file.comments = this.state.comments;
    if (this.options.tokens) file.tokens = babel7CompatTokens(this.tokens);
    return this.finishNode(file, "File");
  }

  parseProgram(program, end = 129, sourceType = this.options.sourceType) {
    program.sourceType = sourceType;
    program.interpreter = this.parseInterpreterDirective();
    this.parseBlockBody(program, true, true, end);

    if (this.inModule && !this.options.allowUndeclaredExports && this.scope.undefinedExports.size > 0) {
      for (const [name] of Array.from(this.scope.undefinedExports)) {
        const pos = this.scope.undefinedExports.get(name);
        this.raise(pos, ErrorMessages.ModuleExportUndefined, name);
      }
    }

    return this.finishNode(program, "Program");
  }

  stmtToDirective(stmt) {
    const directive = stmt;
    directive.type = "Directive";
    directive.value = directive.expression;
    delete directive.expression;
    const directiveLiteral = directive.value;
    const expressionValue = directiveLiteral.value;
    const raw = this.input.slice(directiveLiteral.start, directiveLiteral.end);
    const val = directiveLiteral.value = raw.slice(1, -1);
    this.addExtra(directiveLiteral, "raw", raw);
    this.addExtra(directiveLiteral, "rawValue", val);
    this.addExtra(directiveLiteral, "expressionValue", expressionValue);
    directiveLiteral.type = "DirectiveLiteral";
    return directive;
  }

  parseInterpreterDirective() {
    if (!this.match(26)) {
      return null;
    }

    const node = this.startNode();
    node.value = this.state.value;
    this.next();
    return this.finishNode(node, "InterpreterDirective");
  }

  isLet(context) {
    if (!this.isContextual(93)) {
      return false;
    }

    return this.isLetKeyword(context);
  }

  isLetKeyword(context) {
    const next = this.nextTokenStart();
    const nextCh = this.codePointAtPos(next);

    if (nextCh === 92 || nextCh === 91) {
      return true;
    }

    if (context) return false;
    if (nextCh === 123) return true;

    if (isIdentifierStart(nextCh)) {
      keywordRelationalOperator.lastIndex = next;

      if (keywordRelationalOperator.test(this.input)) {
        const endCh = this.codePointAtPos(keywordRelationalOperator.lastIndex);

        if (!isIdentifierChar(endCh) && endCh !== 92) {
          return false;
        }
      }

      return true;
    }

    return false;
  }

  parseStatement(context, topLevel) {
    if (this.match(24)) {
      this.parseDecorators(true);
    }

    return this.parseStatementContent(context, topLevel);
  }

  parseStatementContent(context, topLevel) {
    let starttype = this.state.type;
    const node = this.startNode();
    let kind;

    if (this.isLet(context)) {
      starttype = 68;
      kind = "let";
    }

    switch (starttype) {
      case 54:
        return this.parseBreakContinueStatement(node, true);

      case 57:
        return this.parseBreakContinueStatement(node, false);

      case 58:
        return this.parseDebuggerStatement(node);

      case 84:
        return this.parseDoStatement(node);

      case 85:
        return this.parseForStatement(node);

      case 62:
        if (this.lookaheadCharCode() === 46) break;

        if (context) {
          if (this.state.strict) {
            this.raise(this.state.start, ErrorMessages.StrictFunction);
          } else if (context !== "if" && context !== "label") {
            this.raise(this.state.start, ErrorMessages.SloppyFunction);
          }
        }

        return this.parseFunctionStatement(node, false, !context);

      case 74:
        if (context) this.unexpected();
        return this.parseClass(node, true);

      case 63:
        return this.parseIfStatement(node);

      case 64:
        return this.parseReturnStatement(node);

      case 65:
        return this.parseSwitchStatement(node);

      case 66:
        return this.parseThrowStatement(node);

      case 67:
        return this.parseTryStatement(node);

      case 69:
      case 68:
        kind = kind || this.state.value;

        if (context && kind !== "var") {
          this.raise(this.state.start, ErrorMessages.UnexpectedLexicalDeclaration);
        }

        return this.parseVarStatement(node, kind);

      case 86:
        return this.parseWhileStatement(node);

      case 70:
        return this.parseWithStatement(node);

      case 5:
        return this.parseBlock();

      case 13:
        return this.parseEmptyStatement(node);

      case 77:
        {
          const nextTokenCharCode = this.lookaheadCharCode();

          if (nextTokenCharCode === 40 || nextTokenCharCode === 46) {
            break;
          }
        }

      case 76:
        {
          if (!this.options.allowImportExportEverywhere && !topLevel) {
            this.raise(this.state.start, ErrorMessages.UnexpectedImportExport);
          }

          this.next();
          let result;

          if (starttype === 77) {
            result = this.parseImport(node);

            if (result.type === "ImportDeclaration" && (!result.importKind || result.importKind === "value")) {
              this.sawUnambiguousESM = true;
            }
          } else {
            result = this.parseExport(node);

            if (result.type === "ExportNamedDeclaration" && (!result.exportKind || result.exportKind === "value") || result.type === "ExportAllDeclaration" && (!result.exportKind || result.exportKind === "value") || result.type === "ExportDefaultDeclaration") {
              this.sawUnambiguousESM = true;
            }
          }

          this.assertModuleNodeAllowed(node);
          return result;
        }

      default:
        {
          if (this.isAsyncFunction()) {
            if (context) {
              this.raise(this.state.start, ErrorMessages.AsyncFunctionInSingleStatementContext);
            }

            this.next();
            return this.parseFunctionStatement(node, true, !context);
          }
        }
    }

    const maybeName = this.state.value;
    const expr = this.parseExpression();

    if (tokenIsIdentifier(starttype) && expr.type === "Identifier" && this.eat(14)) {
      return this.parseLabeledStatement(node, maybeName, expr, context);
    } else {
      return this.parseExpressionStatement(node, expr);
    }
  }

  assertModuleNodeAllowed(node) {
    if (!this.options.allowImportExportEverywhere && !this.inModule) {
      this.raise(node.start, SourceTypeModuleErrorMessages.ImportOutsideModule);
    }
  }

  takeDecorators(node) {
    const decorators = this.state.decoratorStack[this.state.decoratorStack.length - 1];

    if (decorators.length) {
      node.decorators = decorators;
      this.resetStartLocationFromNode(node, decorators[0]);
      this.state.decoratorStack[this.state.decoratorStack.length - 1] = [];
    }
  }

  canHaveLeadingDecorator() {
    return this.match(74);
  }

  parseDecorators(allowExport) {
    const currentContextDecorators = this.state.decoratorStack[this.state.decoratorStack.length - 1];

    while (this.match(24)) {
      const decorator = this.parseDecorator();
      currentContextDecorators.push(decorator);
    }

    if (this.match(76)) {
      if (!allowExport) {
        this.unexpected();
      }

      if (this.hasPlugin("decorators") && !this.getPluginOption("decorators", "decoratorsBeforeExport")) {
        this.raise(this.state.start, ErrorMessages.DecoratorExportClass);
      }
    } else if (!this.canHaveLeadingDecorator()) {
      throw this.raise(this.state.start, ErrorMessages.UnexpectedLeadingDecorator);
    }
  }

  parseDecorator() {
    this.expectOnePlugin(["decorators-legacy", "decorators"]);
    const node = this.startNode();
    this.next();

    if (this.hasPlugin("decorators")) {
      this.state.decoratorStack.push([]);
      const startPos = this.state.start;
      const startLoc = this.state.startLoc;
      let expr;

      if (this.eat(10)) {
        expr = this.parseExpression();
        this.expect(11);
      } else {
        expr = this.parseIdentifier(false);

        while (this.eat(16)) {
          const node = this.startNodeAt(startPos, startLoc);
          node.object = expr;
          node.property = this.parseIdentifier(true);
          node.computed = false;
          expr = this.finishNode(node, "MemberExpression");
        }
      }

      node.expression = this.parseMaybeDecoratorArguments(expr);
      this.state.decoratorStack.pop();
    } else {
      node.expression = this.parseExprSubscripts();
    }

    return this.finishNode(node, "Decorator");
  }

  parseMaybeDecoratorArguments(expr) {
    if (this.eat(10)) {
      const node = this.startNodeAtNode(expr);
      node.callee = expr;
      node.arguments = this.parseCallExpressionArguments(11, false);
      this.toReferencedList(node.arguments);
      return this.finishNode(node, "CallExpression");
    }

    return expr;
  }

  parseBreakContinueStatement(node, isBreak) {
    this.next();

    if (this.isLineTerminator()) {
      node.label = null;
    } else {
      node.label = this.parseIdentifier();
      this.semicolon();
    }

    this.verifyBreakContinue(node, isBreak);
    return this.finishNode(node, isBreak ? "BreakStatement" : "ContinueStatement");
  }

  verifyBreakContinue(node, isBreak) {
    let i;

    for (i = 0; i < this.state.labels.length; ++i) {
      const lab = this.state.labels[i];

      if (node.label == null || lab.name === node.label.name) {
        if (lab.kind != null && (isBreak || lab.kind === "loop")) break;
        if (node.label && isBreak) break;
      }
    }

    if (i === this.state.labels.length) {
      this.raise(node.start, ErrorMessages.IllegalBreakContinue, isBreak ? "break" : "continue");
    }
  }

  parseDebuggerStatement(node) {
    this.next();
    this.semicolon();
    return this.finishNode(node, "DebuggerStatement");
  }

  parseHeaderExpression() {
    this.expect(10);
    const val = this.parseExpression();
    this.expect(11);
    return val;
  }

  parseDoStatement(node) {
    this.next();
    this.state.labels.push(loopLabel);
    node.body = this.withSmartMixTopicForbiddingContext(() => this.parseStatement("do"));
    this.state.labels.pop();
    this.expect(86);
    node.test = this.parseHeaderExpression();
    this.eat(13);
    return this.finishNode(node, "DoWhileStatement");
  }

  parseForStatement(node) {
    this.next();
    this.state.labels.push(loopLabel);
    let awaitAt = -1;

    if (this.isAwaitAllowed() && this.eatContextual(90)) {
      awaitAt = this.state.lastTokStart;
    }

    this.scope.enter(SCOPE_OTHER);
    this.expect(10);

    if (this.match(13)) {
      if (awaitAt > -1) {
        this.unexpected(awaitAt);
      }

      return this.parseFor(node, null);
    }

    const startsWithLet = this.isContextual(93);
    const isLet = startsWithLet && this.isLetKeyword();

    if (this.match(68) || this.match(69) || isLet) {
      const init = this.startNode();
      const kind = isLet ? "let" : this.state.value;
      this.next();
      this.parseVar(init, true, kind);
      this.finishNode(init, "VariableDeclaration");

      if ((this.match(52) || this.isContextual(95)) && init.declarations.length === 1) {
        return this.parseForIn(node, init, awaitAt);
      }

      if (awaitAt > -1) {
        this.unexpected(awaitAt);
      }

      return this.parseFor(node, init);
    }

    const startsWithAsync = this.isContextual(89);
    const refExpressionErrors = new ExpressionErrors();
    const init = this.parseExpression(true, refExpressionErrors);
    const isForOf = this.isContextual(95);

    if (isForOf) {
      if (startsWithLet) {
        this.raise(init.start, ErrorMessages.ForOfLet);
      } else if (awaitAt === -1 && startsWithAsync && init.type === "Identifier") {
        this.raise(init.start, ErrorMessages.ForOfAsync);
      }
    }

    if (isForOf || this.match(52)) {
      this.toAssignable(init, true);
      const description = isForOf ? "for-of statement" : "for-in statement";
      this.checkLVal(init, description);
      return this.parseForIn(node, init, awaitAt);
    } else {
      this.checkExpressionErrors(refExpressionErrors, true);
    }

    if (awaitAt > -1) {
      this.unexpected(awaitAt);
    }

    return this.parseFor(node, init);
  }

  parseFunctionStatement(node, isAsync, declarationPosition) {
    this.next();
    return this.parseFunction(node, FUNC_STATEMENT | (declarationPosition ? 0 : FUNC_HANGING_STATEMENT), isAsync);
  }

  parseIfStatement(node) {
    this.next();
    node.test = this.parseHeaderExpression();
    node.consequent = this.parseStatement("if");
    node.alternate = this.eat(60) ? this.parseStatement("if") : null;
    return this.finishNode(node, "IfStatement");
  }

  parseReturnStatement(node) {
    if (!this.prodParam.hasReturn && !this.options.allowReturnOutsideFunction) {
      this.raise(this.state.start, ErrorMessages.IllegalReturn);
    }

    this.next();

    if (this.isLineTerminator()) {
      node.argument = null;
    } else {
      node.argument = this.parseExpression();
      this.semicolon();
    }

    return this.finishNode(node, "ReturnStatement");
  }

  parseSwitchStatement(node) {
    this.next();
    node.discriminant = this.parseHeaderExpression();
    const cases = node.cases = [];
    this.expect(5);
    this.state.labels.push(switchLabel);
    this.scope.enter(SCOPE_OTHER);
    let cur;

    for (let sawDefault; !this.match(8);) {
      if (this.match(55) || this.match(59)) {
        const isCase = this.match(55);
        if (cur) this.finishNode(cur, "SwitchCase");
        cases.push(cur = this.startNode());
        cur.consequent = [];
        this.next();

        if (isCase) {
          cur.test = this.parseExpression();
        } else {
          if (sawDefault) {
            this.raise(this.state.lastTokStart, ErrorMessages.MultipleDefaultsInSwitch);
          }

          sawDefault = true;
          cur.test = null;
        }

        this.expect(14);
      } else {
        if (cur) {
          cur.consequent.push(this.parseStatement(null));
        } else {
          this.unexpected();
        }
      }
    }

    this.scope.exit();
    if (cur) this.finishNode(cur, "SwitchCase");
    this.next();
    this.state.labels.pop();
    return this.finishNode(node, "SwitchStatement");
  }

  parseThrowStatement(node) {
    this.next();

    if (this.hasPrecedingLineBreak()) {
      this.raise(this.state.lastTokEnd, ErrorMessages.NewlineAfterThrow);
    }

    node.argument = this.parseExpression();
    this.semicolon();
    return this.finishNode(node, "ThrowStatement");
  }

  parseCatchClauseParam() {
    const param = this.parseBindingAtom();
    const simple = param.type === "Identifier";
    this.scope.enter(simple ? SCOPE_SIMPLE_CATCH : 0);
    this.checkLVal(param, "catch clause", BIND_LEXICAL);
    return param;
  }

  parseTryStatement(node) {
    this.next();
    node.block = this.parseBlock();
    node.handler = null;

    if (this.match(56)) {
      const clause = this.startNode();
      this.next();

      if (this.match(10)) {
        this.expect(10);
        clause.param = this.parseCatchClauseParam();
        this.expect(11);
      } else {
        clause.param = null;
        this.scope.enter(SCOPE_OTHER);
      }

      clause.body = this.withSmartMixTopicForbiddingContext(() => this.parseBlock(false, false));
      this.scope.exit();
      node.handler = this.finishNode(clause, "CatchClause");
    }

    node.finalizer = this.eat(61) ? this.parseBlock() : null;

    if (!node.handler && !node.finalizer) {
      this.raise(node.start, ErrorMessages.NoCatchOrFinally);
    }

    return this.finishNode(node, "TryStatement");
  }

  parseVarStatement(node, kind) {
    this.next();
    this.parseVar(node, false, kind);
    this.semicolon();
    return this.finishNode(node, "VariableDeclaration");
  }

  parseWhileStatement(node) {
    this.next();
    node.test = this.parseHeaderExpression();
    this.state.labels.push(loopLabel);
    node.body = this.withSmartMixTopicForbiddingContext(() => this.parseStatement("while"));
    this.state.labels.pop();
    return this.finishNode(node, "WhileStatement");
  }

  parseWithStatement(node) {
    if (this.state.strict) {
      this.raise(this.state.start, ErrorMessages.StrictWith);
    }

    this.next();
    node.object = this.parseHeaderExpression();
    node.body = this.withSmartMixTopicForbiddingContext(() => this.parseStatement("with"));
    return this.finishNode(node, "WithStatement");
  }

  parseEmptyStatement(node) {
    this.next();
    return this.finishNode(node, "EmptyStatement");
  }

  parseLabeledStatement(node, maybeName, expr, context) {
    for (const label of this.state.labels) {
      if (label.name === maybeName) {
        this.raise(expr.start, ErrorMessages.LabelRedeclaration, maybeName);
      }
    }

    const kind = tokenIsLoop(this.state.type) ? "loop" : this.match(65) ? "switch" : null;

    for (let i = this.state.labels.length - 1; i >= 0; i--) {
      const label = this.state.labels[i];

      if (label.statementStart === node.start) {
        label.statementStart = this.state.start;
        label.kind = kind;
      } else {
        break;
      }
    }

    this.state.labels.push({
      name: maybeName,
      kind: kind,
      statementStart: this.state.start
    });
    node.body = this.parseStatement(context ? context.indexOf("label") === -1 ? context + "label" : context : "label");
    this.state.labels.pop();
    node.label = expr;
    return this.finishNode(node, "LabeledStatement");
  }

  parseExpressionStatement(node, expr) {
    node.expression = expr;
    this.semicolon();
    return this.finishNode(node, "ExpressionStatement");
  }

  parseBlock(allowDirectives = false, createNewLexicalScope = true, afterBlockParse) {
    const node = this.startNode();

    if (allowDirectives) {
      this.state.strictErrors.clear();
    }

    this.expect(5);

    if (createNewLexicalScope) {
      this.scope.enter(SCOPE_OTHER);
    }

    this.parseBlockBody(node, allowDirectives, false, 8, afterBlockParse);

    if (createNewLexicalScope) {
      this.scope.exit();
    }

    return this.finishNode(node, "BlockStatement");
  }

  isValidDirective(stmt) {
    return stmt.type === "ExpressionStatement" && stmt.expression.type === "StringLiteral" && !stmt.expression.extra.parenthesized;
  }

  parseBlockBody(node, allowDirectives, topLevel, end, afterBlockParse) {
    const body = node.body = [];
    const directives = node.directives = [];
    this.parseBlockOrModuleBlockBody(body, allowDirectives ? directives : undefined, topLevel, end, afterBlockParse);
  }

  parseBlockOrModuleBlockBody(body, directives, topLevel, end, afterBlockParse) {
    const oldStrict = this.state.strict;
    let hasStrictModeDirective = false;
    let parsedNonDirective = false;

    while (!this.match(end)) {
      const stmt = this.parseStatement(null, topLevel);

      if (directives && !parsedNonDirective) {
        if (this.isValidDirective(stmt)) {
          const directive = this.stmtToDirective(stmt);
          directives.push(directive);

          if (!hasStrictModeDirective && directive.value.value === "use strict") {
            hasStrictModeDirective = true;
            this.setStrict(true);
          }

          continue;
        }

        parsedNonDirective = true;
        this.state.strictErrors.clear();
      }

      body.push(stmt);
    }

    if (afterBlockParse) {
      afterBlockParse.call(this, hasStrictModeDirective);
    }

    if (!oldStrict) {
      this.setStrict(false);
    }

    this.next();
  }

  parseFor(node, init) {
    node.init = init;
    this.semicolon(false);
    node.test = this.match(13) ? null : this.parseExpression();
    this.semicolon(false);
    node.update = this.match(11) ? null : this.parseExpression();
    this.expect(11);
    node.body = this.withSmartMixTopicForbiddingContext(() => this.parseStatement("for"));
    this.scope.exit();
    this.state.labels.pop();
    return this.finishNode(node, "ForStatement");
  }

  parseForIn(node, init, awaitAt) {
    const isForIn = this.match(52);
    this.next();

    if (isForIn) {
      if (awaitAt > -1) this.unexpected(awaitAt);
    } else {
      node.await = awaitAt > -1;
    }

    if (init.type === "VariableDeclaration" && init.declarations[0].init != null && (!isForIn || this.state.strict || init.kind !== "var" || init.declarations[0].id.type !== "Identifier")) {
      this.raise(init.start, ErrorMessages.ForInOfLoopInitializer, isForIn ? "for-in" : "for-of");
    } else if (init.type === "AssignmentPattern") {
      this.raise(init.start, ErrorMessages.InvalidLhs, "for-loop");
    }

    node.left = init;
    node.right = isForIn ? this.parseExpression() : this.parseMaybeAssignAllowIn();
    this.expect(11);
    node.body = this.withSmartMixTopicForbiddingContext(() => this.parseStatement("for"));
    this.scope.exit();
    this.state.labels.pop();
    return this.finishNode(node, isForIn ? "ForInStatement" : "ForOfStatement");
  }

  parseVar(node, isFor, kind) {
    const declarations = node.declarations = [];
    const isTypescript = this.hasPlugin("typescript");
    node.kind = kind;

    for (;;) {
      const decl = this.startNode();
      this.parseVarId(decl, kind);

      if (this.eat(27)) {
        decl.init = isFor ? this.parseMaybeAssignDisallowIn() : this.parseMaybeAssignAllowIn();
      } else {
        if (kind === "const" && !(this.match(52) || this.isContextual(95))) {
          if (!isTypescript) {
            this.raise(this.state.lastTokEnd, ErrorMessages.DeclarationMissingInitializer, "Const declarations");
          }
        } else if (decl.id.type !== "Identifier" && !(isFor && (this.match(52) || this.isContextual(95)))) {
          this.raise(this.state.lastTokEnd, ErrorMessages.DeclarationMissingInitializer, "Complex binding patterns");
        }

        decl.init = null;
      }

      declarations.push(this.finishNode(decl, "VariableDeclarator"));
      if (!this.eat(12)) break;
    }

    return node;
  }

  parseVarId(decl, kind) {
    decl.id = this.parseBindingAtom();
    this.checkLVal(decl.id, "variable declaration", kind === "var" ? BIND_VAR : BIND_LEXICAL, undefined, kind !== "var");
  }

  parseFunction(node, statement = FUNC_NO_FLAGS, isAsync = false) {
    const isStatement = statement & FUNC_STATEMENT;
    const isHangingStatement = statement & FUNC_HANGING_STATEMENT;
    const requireId = !!isStatement && !(statement & FUNC_NULLABLE_ID);
    this.initFunction(node, isAsync);

    if (this.match(49) && isHangingStatement) {
      this.raise(this.state.start, ErrorMessages.GeneratorInSingleStatementContext);
    }

    node.generator = this.eat(49);

    if (isStatement) {
      node.id = this.parseFunctionId(requireId);
    }

    const oldMaybeInArrowParameters = this.state.maybeInArrowParameters;
    this.state.maybeInArrowParameters = false;
    this.scope.enter(SCOPE_FUNCTION);
    this.prodParam.enter(functionFlags(isAsync, node.generator));

    if (!isStatement) {
      node.id = this.parseFunctionId();
    }

    this.parseFunctionParams(node, false);
    this.withSmartMixTopicForbiddingContext(() => {
      this.parseFunctionBodyAndFinish(node, isStatement ? "FunctionDeclaration" : "FunctionExpression");
    });
    this.prodParam.exit();
    this.scope.exit();

    if (isStatement && !isHangingStatement) {
      this.registerFunctionStatementId(node);
    }

    this.state.maybeInArrowParameters = oldMaybeInArrowParameters;
    return node;
  }

  parseFunctionId(requireId) {
    return requireId || tokenIsIdentifier(this.state.type) ? this.parseIdentifier() : null;
  }

  parseFunctionParams(node, allowModifiers) {
    this.expect(10);
    this.expressionScope.enter(newParameterDeclarationScope());
    node.params = this.parseBindingList(11, 41, false, allowModifiers);
    this.expressionScope.exit();
  }

  registerFunctionStatementId(node) {
    if (!node.id) return;
    this.scope.declareName(node.id.name, this.state.strict || node.generator || node.async ? this.scope.treatFunctionsAsVar ? BIND_VAR : BIND_LEXICAL : BIND_FUNCTION, node.id.start);
  }

  parseClass(node, isStatement, optionalId) {
    this.next();
    this.takeDecorators(node);
    const oldStrict = this.state.strict;
    this.state.strict = true;
    this.parseClassId(node, isStatement, optionalId);
    this.parseClassSuper(node);
    node.body = this.parseClassBody(!!node.superClass, oldStrict);
    return this.finishNode(node, isStatement ? "ClassDeclaration" : "ClassExpression");
  }

  isClassProperty() {
    return this.match(27) || this.match(13) || this.match(8);
  }

  isClassMethod() {
    return this.match(10);
  }

  isNonstaticConstructor(method) {
    return !method.computed && !method.static && (method.key.name === "constructor" || method.key.value === "constructor");
  }

  parseClassBody(hadSuperClass, oldStrict) {
    this.classScope.enter();
    const state = {
      hadConstructor: false,
      hadSuperClass
    };
    let decorators = [];
    const classBody = this.startNode();
    classBody.body = [];
    this.expect(5);
    this.withSmartMixTopicForbiddingContext(() => {
      while (!this.match(8)) {
        if (this.eat(13)) {
          if (decorators.length > 0) {
            throw this.raise(this.state.lastTokEnd, ErrorMessages.DecoratorSemicolon);
          }

          continue;
        }

        if (this.match(24)) {
          decorators.push(this.parseDecorator());
          continue;
        }

        const member = this.startNode();

        if (decorators.length) {
          member.decorators = decorators;
          this.resetStartLocationFromNode(member, decorators[0]);
          decorators = [];
        }

        this.parseClassMember(classBody, member, state);

        if (member.kind === "constructor" && member.decorators && member.decorators.length > 0) {
          this.raise(member.start, ErrorMessages.DecoratorConstructor);
        }
      }
    });
    this.state.strict = oldStrict;
    this.next();

    if (decorators.length) {
      throw this.raise(this.state.start, ErrorMessages.TrailingDecorator);
    }

    this.classScope.exit();
    return this.finishNode(classBody, "ClassBody");
  }

  parseClassMemberFromModifier(classBody, member) {
    const key = this.parseIdentifier(true);

    if (this.isClassMethod()) {
      const method = member;
      method.kind = "method";
      method.computed = false;
      method.key = key;
      method.static = false;
      this.pushClassMethod(classBody, method, false, false, false, false);
      return true;
    } else if (this.isClassProperty()) {
      const prop = member;
      prop.computed = false;
      prop.key = key;
      prop.static = false;
      classBody.body.push(this.parseClassProperty(prop));
      return true;
    }

    this.resetPreviousNodeTrailingComments(key);
    return false;
  }

  parseClassMember(classBody, member, state) {
    const isStatic = this.isContextual(98);

    if (isStatic) {
      if (this.parseClassMemberFromModifier(classBody, member)) {
        return;
      }

      if (this.eat(5)) {
        this.parseClassStaticBlock(classBody, member);
        return;
      }
    }

    this.parseClassMemberWithIsStatic(classBody, member, state, isStatic);
  }

  parseClassMemberWithIsStatic(classBody, member, state, isStatic) {
    const publicMethod = member;
    const privateMethod = member;
    const publicProp = member;
    const privateProp = member;
    const method = publicMethod;
    const publicMember = publicMethod;
    member.static = isStatic;
    this.parsePropertyNamePrefixOperator(member);

    if (this.eat(49)) {
      method.kind = "method";
      const isPrivateName = this.match(128);
      this.parseClassElementName(method);

      if (isPrivateName) {
        this.pushClassPrivateMethod(classBody, privateMethod, true, false);
        return;
      }

      if (this.isNonstaticConstructor(publicMethod)) {
        this.raise(publicMethod.key.start, ErrorMessages.ConstructorIsGenerator);
      }

      this.pushClassMethod(classBody, publicMethod, true, false, false, false);
      return;
    }

    const isContextual = tokenIsIdentifier(this.state.type) && !this.state.containsEsc;
    const isPrivate = this.match(128);
    const key = this.parseClassElementName(member);
    const maybeQuestionTokenStart = this.state.start;
    this.parsePostMemberNameModifiers(publicMember);

    if (this.isClassMethod()) {
      method.kind = "method";

      if (isPrivate) {
        this.pushClassPrivateMethod(classBody, privateMethod, false, false);
        return;
      }

      const isConstructor = this.isNonstaticConstructor(publicMethod);
      let allowsDirectSuper = false;

      if (isConstructor) {
        publicMethod.kind = "constructor";

        if (state.hadConstructor && !this.hasPlugin("typescript")) {
          this.raise(key.start, ErrorMessages.DuplicateConstructor);
        }

        if (isConstructor && this.hasPlugin("typescript") && member.override) {
          this.raise(key.start, ErrorMessages.OverrideOnConstructor);
        }

        state.hadConstructor = true;
        allowsDirectSuper = state.hadSuperClass;
      }

      this.pushClassMethod(classBody, publicMethod, false, false, isConstructor, allowsDirectSuper);
    } else if (this.isClassProperty()) {
      if (isPrivate) {
        this.pushClassPrivateProperty(classBody, privateProp);
      } else {
        this.pushClassProperty(classBody, publicProp);
      }
    } else if (isContextual && key.name === "async" && !this.isLineTerminator()) {
      this.resetPreviousNodeTrailingComments(key);
      const isGenerator = this.eat(49);

      if (publicMember.optional) {
        this.unexpected(maybeQuestionTokenStart);
      }

      method.kind = "method";
      const isPrivate = this.match(128);
      this.parseClassElementName(method);
      this.parsePostMemberNameModifiers(publicMember);

      if (isPrivate) {
        this.pushClassPrivateMethod(classBody, privateMethod, isGenerator, true);
      } else {
        if (this.isNonstaticConstructor(publicMethod)) {
          this.raise(publicMethod.key.start, ErrorMessages.ConstructorIsAsync);
        }

        this.pushClassMethod(classBody, publicMethod, isGenerator, true, false, false);
      }
    } else if (isContextual && (key.name === "get" || key.name === "set") && !(this.match(49) && this.isLineTerminator())) {
      this.resetPreviousNodeTrailingComments(key);
      method.kind = key.name;
      const isPrivate = this.match(128);
      this.parseClassElementName(publicMethod);

      if (isPrivate) {
        this.pushClassPrivateMethod(classBody, privateMethod, false, false);
      } else {
        if (this.isNonstaticConstructor(publicMethod)) {
          this.raise(publicMethod.key.start, ErrorMessages.ConstructorIsAccessor);
        }

        this.pushClassMethod(classBody, publicMethod, false, false, false, false);
      }

      this.checkGetterSetterParams(publicMethod);
    } else if (this.isLineTerminator()) {
      if (isPrivate) {
        this.pushClassPrivateProperty(classBody, privateProp);
      } else {
        this.pushClassProperty(classBody, publicProp);
      }
    } else {
      this.unexpected();
    }
  }

  parseClassElementName(member) {
    const {
      type,
      value,
      start
    } = this.state;

    if ((type === 122 || type === 123) && member.static && value === "prototype") {
      this.raise(start, ErrorMessages.StaticPrototype);
    }

    if (type === 128) {
      if (value === "constructor") {
        this.raise(start, ErrorMessages.ConstructorClassPrivateField);
      }

      const key = this.parsePrivateName();
      member.key = key;
      return key;
    }

    return this.parsePropertyName(member);
  }

  parseClassStaticBlock(classBody, member) {
    var _member$decorators;

    this.scope.enter(SCOPE_CLASS | SCOPE_STATIC_BLOCK | SCOPE_SUPER);
    const oldLabels = this.state.labels;
    this.state.labels = [];
    this.prodParam.enter(PARAM);
    const body = member.body = [];
    this.parseBlockOrModuleBlockBody(body, undefined, false, 8);
    this.prodParam.exit();
    this.scope.exit();
    this.state.labels = oldLabels;
    classBody.body.push(this.finishNode(member, "StaticBlock"));

    if ((_member$decorators = member.decorators) != null && _member$decorators.length) {
      this.raise(member.start, ErrorMessages.DecoratorStaticBlock);
    }
  }

  pushClassProperty(classBody, prop) {
    if (!prop.computed && (prop.key.name === "constructor" || prop.key.value === "constructor")) {
      this.raise(prop.key.start, ErrorMessages.ConstructorClassField);
    }

    classBody.body.push(this.parseClassProperty(prop));
  }

  pushClassPrivateProperty(classBody, prop) {
    const node = this.parseClassPrivateProperty(prop);
    classBody.body.push(node);
    this.classScope.declarePrivateName(this.getPrivateNameSV(node.key), CLASS_ELEMENT_OTHER, node.key.start);
  }

  pushClassMethod(classBody, method, isGenerator, isAsync, isConstructor, allowsDirectSuper) {
    classBody.body.push(this.parseMethod(method, isGenerator, isAsync, isConstructor, allowsDirectSuper, "ClassMethod", true));
  }

  pushClassPrivateMethod(classBody, method, isGenerator, isAsync) {
    const node = this.parseMethod(method, isGenerator, isAsync, false, false, "ClassPrivateMethod", true);
    classBody.body.push(node);
    const kind = node.kind === "get" ? node.static ? CLASS_ELEMENT_STATIC_GETTER : CLASS_ELEMENT_INSTANCE_GETTER : node.kind === "set" ? node.static ? CLASS_ELEMENT_STATIC_SETTER : CLASS_ELEMENT_INSTANCE_SETTER : CLASS_ELEMENT_OTHER;
    this.declareClassPrivateMethodInScope(node, kind);
  }

  declareClassPrivateMethodInScope(node, kind) {
    this.classScope.declarePrivateName(this.getPrivateNameSV(node.key), kind, node.key.start);
  }

  parsePostMemberNameModifiers(methodOrProp) {}

  parseClassPrivateProperty(node) {
    this.parseInitializer(node);
    this.semicolon();
    return this.finishNode(node, "ClassPrivateProperty");
  }

  parseClassProperty(node) {
    this.parseInitializer(node);
    this.semicolon();
    return this.finishNode(node, "ClassProperty");
  }

  parseInitializer(node) {
    this.scope.enter(SCOPE_CLASS | SCOPE_SUPER);
    this.expressionScope.enter(newExpressionScope());
    this.prodParam.enter(PARAM);
    node.value = this.eat(27) ? this.parseMaybeAssignAllowIn() : null;
    this.expressionScope.exit();
    this.prodParam.exit();
    this.scope.exit();
  }

  parseClassId(node, isStatement, optionalId, bindingType = BIND_CLASS) {
    if (tokenIsIdentifier(this.state.type)) {
      node.id = this.parseIdentifier();

      if (isStatement) {
        this.checkLVal(node.id, "class name", bindingType);
      }
    } else {
      if (optionalId || !isStatement) {
        node.id = null;
      } else {
        this.unexpected(null, ErrorMessages.MissingClassName);
      }
    }
  }

  parseClassSuper(node) {
    node.superClass = this.eat(75) ? this.parseExprSubscripts() : null;
  }

  parseExport(node) {
    const hasDefault = this.maybeParseExportDefaultSpecifier(node);
    const parseAfterDefault = !hasDefault || this.eat(12);
    const hasStar = parseAfterDefault && this.eatExportStar(node);
    const hasNamespace = hasStar && this.maybeParseExportNamespaceSpecifier(node);
    const parseAfterNamespace = parseAfterDefault && (!hasNamespace || this.eat(12));
    const isFromRequired = hasDefault || hasStar;

    if (hasStar && !hasNamespace) {
      if (hasDefault) this.unexpected();
      this.parseExportFrom(node, true);
      return this.finishNode(node, "ExportAllDeclaration");
    }

    const hasSpecifiers = this.maybeParseExportNamedSpecifiers(node);

    if (hasDefault && parseAfterDefault && !hasStar && !hasSpecifiers || hasNamespace && parseAfterNamespace && !hasSpecifiers) {
      throw this.unexpected(null, 5);
    }

    let hasDeclaration;

    if (isFromRequired || hasSpecifiers) {
      hasDeclaration = false;
      this.parseExportFrom(node, isFromRequired);
    } else {
      hasDeclaration = this.maybeParseExportDeclaration(node);
    }

    if (isFromRequired || hasSpecifiers || hasDeclaration) {
      this.checkExport(node, true, false, !!node.source);
      return this.finishNode(node, "ExportNamedDeclaration");
    }

    if (this.eat(59)) {
      node.declaration = this.parseExportDefaultExpression();
      this.checkExport(node, true, true);
      return this.finishNode(node, "ExportDefaultDeclaration");
    }

    throw this.unexpected(null, 5);
  }

  eatExportStar(node) {
    return this.eat(49);
  }

  maybeParseExportDefaultSpecifier(node) {
    if (this.isExportDefaultSpecifier()) {
      this.expectPlugin("exportDefaultFrom");
      const specifier = this.startNode();
      specifier.exported = this.parseIdentifier(true);
      node.specifiers = [this.finishNode(specifier, "ExportDefaultSpecifier")];
      return true;
    }

    return false;
  }

  maybeParseExportNamespaceSpecifier(node) {
    if (this.isContextual(87)) {
      if (!node.specifiers) node.specifiers = [];
      const specifier = this.startNodeAt(this.state.lastTokStart, this.state.lastTokStartLoc);
      this.next();
      specifier.exported = this.parseModuleExportName();
      node.specifiers.push(this.finishNode(specifier, "ExportNamespaceSpecifier"));
      return true;
    }

    return false;
  }

  maybeParseExportNamedSpecifiers(node) {
    if (this.match(5)) {
      if (!node.specifiers) node.specifiers = [];
      const isTypeExport = node.exportKind === "type";
      node.specifiers.push(...this.parseExportSpecifiers(isTypeExport));
      node.source = null;
      node.declaration = null;

      if (this.hasPlugin("importAssertions")) {
        node.assertions = [];
      }

      return true;
    }

    return false;
  }

  maybeParseExportDeclaration(node) {
    if (this.shouldParseExportDeclaration()) {
      node.specifiers = [];
      node.source = null;

      if (this.hasPlugin("importAssertions")) {
        node.assertions = [];
      }

      node.declaration = this.parseExportDeclaration(node);
      return true;
    }

    return false;
  }

  isAsyncFunction() {
    if (!this.isContextual(89)) return false;
    const next = this.nextTokenStart();
    return !lineBreak.test(this.input.slice(this.state.pos, next)) && this.isUnparsedContextual(next, "function");
  }

  parseExportDefaultExpression() {
    const expr = this.startNode();
    const isAsync = this.isAsyncFunction();

    if (this.match(62) || isAsync) {
      this.next();

      if (isAsync) {
        this.next();
      }

      return this.parseFunction(expr, FUNC_STATEMENT | FUNC_NULLABLE_ID, isAsync);
    } else if (this.match(74)) {
      return this.parseClass(expr, true, true);
    } else if (this.match(24)) {
      if (this.hasPlugin("decorators") && this.getPluginOption("decorators", "decoratorsBeforeExport")) {
        this.raise(this.state.start, ErrorMessages.DecoratorBeforeExport);
      }

      this.parseDecorators(false);
      return this.parseClass(expr, true, true);
    } else if (this.match(69) || this.match(68) || this.isLet()) {
      throw this.raise(this.state.start, ErrorMessages.UnsupportedDefaultExport);
    } else {
      const res = this.parseMaybeAssignAllowIn();
      this.semicolon();
      return res;
    }
  }

  parseExportDeclaration(node) {
    return this.parseStatement(null);
  }

  isExportDefaultSpecifier() {
    const {
      type
    } = this.state;

    if (tokenIsIdentifier(type)) {
      if (type === 89 && !this.state.containsEsc || type === 93) {
        return false;
      }

      if ((type === 120 || type === 119) && !this.state.containsEsc) {
        const {
          type: nextType
        } = this.lookahead();

        if (tokenIsIdentifier(nextType) && nextType !== 91 || nextType === 5) {
          this.expectOnePlugin(["flow", "typescript"]);
          return false;
        }
      }
    } else if (!this.match(59)) {
      return false;
    }

    const next = this.nextTokenStart();
    const hasFrom = this.isUnparsedContextual(next, "from");

    if (this.input.charCodeAt(next) === 44 || tokenIsIdentifier(this.state.type) && hasFrom) {
      return true;
    }

    if (this.match(59) && hasFrom) {
      const nextAfterFrom = this.input.charCodeAt(this.nextTokenStartSince(next + 4));
      return nextAfterFrom === 34 || nextAfterFrom === 39;
    }

    return false;
  }

  parseExportFrom(node, expect) {
    if (this.eatContextual(91)) {
      node.source = this.parseImportSource();
      this.checkExport(node);
      const assertions = this.maybeParseImportAssertions();

      if (assertions) {
        node.assertions = assertions;
      }
    } else if (expect) {
      this.unexpected();
    }

    this.semicolon();
  }

  shouldParseExportDeclaration() {
    const {
      type
    } = this.state;

    if (type === 24) {
      this.expectOnePlugin(["decorators", "decorators-legacy"]);

      if (this.hasPlugin("decorators")) {
        if (this.getPluginOption("decorators", "decoratorsBeforeExport")) {
          this.unexpected(this.state.start, ErrorMessages.DecoratorBeforeExport);
        } else {
          return true;
        }
      }
    }

    return type === 68 || type === 69 || type === 62 || type === 74 || this.isLet() || this.isAsyncFunction();
  }

  checkExport(node, checkNames, isDefault, isFrom) {
    if (checkNames) {
      if (isDefault) {
        this.checkDuplicateExports(node, "default");

        if (this.hasPlugin("exportDefaultFrom")) {
          var _declaration$extra;

          const declaration = node.declaration;

          if (declaration.type === "Identifier" && declaration.name === "from" && declaration.end - declaration.start === 4 && !((_declaration$extra = declaration.extra) != null && _declaration$extra.parenthesized)) {
            this.raise(declaration.start, ErrorMessages.ExportDefaultFromAsIdentifier);
          }
        }
      } else if (node.specifiers && node.specifiers.length) {
        for (const specifier of node.specifiers) {
          const {
            exported
          } = specifier;
          const exportedName = exported.type === "Identifier" ? exported.name : exported.value;
          this.checkDuplicateExports(specifier, exportedName);

          if (!isFrom && specifier.local) {
            const {
              local
            } = specifier;

            if (local.type !== "Identifier") {
              this.raise(specifier.start, ErrorMessages.ExportBindingIsString, local.value, exportedName);
            } else {
              this.checkReservedWord(local.name, local.start, true, false);
              this.scope.checkLocalExport(local);
            }
          }
        }
      } else if (node.declaration) {
        if (node.declaration.type === "FunctionDeclaration" || node.declaration.type === "ClassDeclaration") {
          const id = node.declaration.id;
          if (!id) throw new Error("Assertion failure");
          this.checkDuplicateExports(node, id.name);
        } else if (node.declaration.type === "VariableDeclaration") {
          for (const declaration of node.declaration.declarations) {
            this.checkDeclaration(declaration.id);
          }
        }
      }
    }

    const currentContextDecorators = this.state.decoratorStack[this.state.decoratorStack.length - 1];

    if (currentContextDecorators.length) {
      throw this.raise(node.start, ErrorMessages.UnsupportedDecoratorExport);
    }
  }

  checkDeclaration(node) {
    if (node.type === "Identifier") {
      this.checkDuplicateExports(node, node.name);
    } else if (node.type === "ObjectPattern") {
      for (const prop of node.properties) {
        this.checkDeclaration(prop);
      }
    } else if (node.type === "ArrayPattern") {
      for (const elem of node.elements) {
        if (elem) {
          this.checkDeclaration(elem);
        }
      }
    } else if (node.type === "ObjectProperty") {
      this.checkDeclaration(node.value);
    } else if (node.type === "RestElement") {
      this.checkDeclaration(node.argument);
    } else if (node.type === "AssignmentPattern") {
      this.checkDeclaration(node.left);
    }
  }

  checkDuplicateExports(node, name) {
    if (this.exportedIdentifiers.has(name)) {
      this.raise(node.start, name === "default" ? ErrorMessages.DuplicateDefaultExport : ErrorMessages.DuplicateExport, name);
    }

    this.exportedIdentifiers.add(name);
  }

  parseExportSpecifiers(isInTypeExport) {
    const nodes = [];
    let first = true;
    this.expect(5);

    while (!this.eat(8)) {
      if (first) {
        first = false;
      } else {
        this.expect(12);
        if (this.eat(8)) break;
      }

      const isMaybeTypeOnly = this.isContextual(120);
      const isString = this.match(123);
      const node = this.startNode();
      node.local = this.parseModuleExportName();
      nodes.push(this.parseExportSpecifier(node, isString, isInTypeExport, isMaybeTypeOnly));
    }

    return nodes;
  }

  parseExportSpecifier(node, isString, isInTypeExport, isMaybeTypeOnly) {
    if (this.eatContextual(87)) {
      node.exported = this.parseModuleExportName();
    } else if (isString) {
      node.exported = cloneStringLiteral(node.local);
    } else if (!node.exported) {
      node.exported = cloneIdentifier(node.local);
    }

    return this.finishNode(node, "ExportSpecifier");
  }

  parseModuleExportName() {
    if (this.match(123)) {
      const result = this.parseStringLiteral(this.state.value);
      const surrogate = result.value.match(loneSurrogate);

      if (surrogate) {
        this.raise(result.start, ErrorMessages.ModuleExportNameHasLoneSurrogate, surrogate[0].charCodeAt(0).toString(16));
      }

      return result;
    }

    return this.parseIdentifier(true);
  }

  parseImport(node) {
    node.specifiers = [];

    if (!this.match(123)) {
      const hasDefault = this.maybeParseDefaultImportSpecifier(node);
      const parseNext = !hasDefault || this.eat(12);
      const hasStar = parseNext && this.maybeParseStarImportSpecifier(node);
      if (parseNext && !hasStar) this.parseNamedImportSpecifiers(node);
      this.expectContextual(91);
    }

    node.source = this.parseImportSource();
    const assertions = this.maybeParseImportAssertions();

    if (assertions) {
      node.assertions = assertions;
    } else {
      const attributes = this.maybeParseModuleAttributes();

      if (attributes) {
        node.attributes = attributes;
      }
    }

    this.semicolon();
    return this.finishNode(node, "ImportDeclaration");
  }

  parseImportSource() {
    if (!this.match(123)) this.unexpected();
    return this.parseExprAtom();
  }

  shouldParseDefaultImport(node) {
    return tokenIsIdentifier(this.state.type);
  }

  parseImportSpecifierLocal(node, specifier, type, contextDescription) {
    specifier.local = this.parseIdentifier();
    this.checkLVal(specifier.local, contextDescription, BIND_LEXICAL);
    node.specifiers.push(this.finishNode(specifier, type));
  }

  parseAssertEntries() {
    const attrs = [];
    const attrNames = new Set();

    do {
      if (this.match(8)) {
        break;
      }

      const node = this.startNode();
      const keyName = this.state.value;

      if (attrNames.has(keyName)) {
        this.raise(this.state.start, ErrorMessages.ModuleAttributesWithDuplicateKeys, keyName);
      }

      attrNames.add(keyName);

      if (this.match(123)) {
        node.key = this.parseStringLiteral(keyName);
      } else {
        node.key = this.parseIdentifier(true);
      }

      this.expect(14);

      if (!this.match(123)) {
        throw this.unexpected(this.state.start, ErrorMessages.ModuleAttributeInvalidValue);
      }

      node.value = this.parseStringLiteral(this.state.value);
      this.finishNode(node, "ImportAttribute");
      attrs.push(node);
    } while (this.eat(12));

    return attrs;
  }

  maybeParseModuleAttributes() {
    if (this.match(70) && !this.hasPrecedingLineBreak()) {
      this.expectPlugin("moduleAttributes");
      this.next();
    } else {
      if (this.hasPlugin("moduleAttributes")) return [];
      return null;
    }

    const attrs = [];
    const attributes = new Set();

    do {
      const node = this.startNode();
      node.key = this.parseIdentifier(true);

      if (node.key.name !== "type") {
        this.raise(node.key.start, ErrorMessages.ModuleAttributeDifferentFromType, node.key.name);
      }

      if (attributes.has(node.key.name)) {
        this.raise(node.key.start, ErrorMessages.ModuleAttributesWithDuplicateKeys, node.key.name);
      }

      attributes.add(node.key.name);
      this.expect(14);

      if (!this.match(123)) {
        throw this.unexpected(this.state.start, ErrorMessages.ModuleAttributeInvalidValue);
      }

      node.value = this.parseStringLiteral(this.state.value);
      this.finishNode(node, "ImportAttribute");
      attrs.push(node);
    } while (this.eat(12));

    return attrs;
  }

  maybeParseImportAssertions() {
    if (this.isContextual(88) && !this.hasPrecedingLineBreak()) {
      this.expectPlugin("importAssertions");
      this.next();
    } else {
      if (this.hasPlugin("importAssertions")) return [];
      return null;
    }

    this.eat(5);
    const attrs = this.parseAssertEntries();
    this.eat(8);
    return attrs;
  }

  maybeParseDefaultImportSpecifier(node) {
    if (this.shouldParseDefaultImport(node)) {
      this.parseImportSpecifierLocal(node, this.startNode(), "ImportDefaultSpecifier", "default import specifier");
      return true;
    }

    return false;
  }

  maybeParseStarImportSpecifier(node) {
    if (this.match(49)) {
      const specifier = this.startNode();
      this.next();
      this.expectContextual(87);
      this.parseImportSpecifierLocal(node, specifier, "ImportNamespaceSpecifier", "import namespace specifier");
      return true;
    }

    return false;
  }

  parseNamedImportSpecifiers(node) {
    let first = true;
    this.expect(5);

    while (!this.eat(8)) {
      if (first) {
        first = false;
      } else {
        if (this.eat(14)) {
          throw this.raise(this.state.start, ErrorMessages.DestructureNamedImport);
        }

        this.expect(12);
        if (this.eat(8)) break;
      }

      const specifier = this.startNode();
      const importedIsString = this.match(123);
      const isMaybeTypeOnly = this.isContextual(120);
      specifier.imported = this.parseModuleExportName();
      const importSpecifier = this.parseImportSpecifier(specifier, importedIsString, node.importKind === "type" || node.importKind === "typeof", isMaybeTypeOnly);
      node.specifiers.push(importSpecifier);
    }
  }

  parseImportSpecifier(specifier, importedIsString, isInTypeOnlyImport, isMaybeTypeOnly) {
    if (this.eatContextual(87)) {
      specifier.local = this.parseIdentifier();
    } else {
      const {
        imported
      } = specifier;

      if (importedIsString) {
        throw this.raise(specifier.start, ErrorMessages.ImportBindingIsString, imported.value);
      }

      this.checkReservedWord(imported.name, specifier.start, true, true);

      if (!specifier.local) {
        specifier.local = cloneIdentifier(imported);
      }
    }

    this.checkLVal(specifier.local, "import specifier", BIND_LEXICAL);
    return this.finishNode(specifier, "ImportSpecifier");
  }

  isThisParam(param) {
    return param.type === "Identifier" && param.name === "this";
  }

}

class Parser extends StatementParser {
  constructor(options, input) {
    options = getOptions(options);
    super(options, input);
    this.options = options;
    this.initializeScopes();
    this.plugins = pluginsMap(this.options.plugins);
    this.filename = options.sourceFilename;
  }

  getScopeHandler() {
    return ScopeHandler;
  }

  parse() {
    this.enterInitialScopes();
    const file = this.startNode();
    const program = this.startNode();
    this.nextToken();
    file.errors = null;
    this.parseTopLevel(file, program);
    file.errors = this.state.errors;
    return file;
  }

}

function pluginsMap(plugins) {
  const pluginMap = new Map();

  for (const plugin of plugins) {
    const [name, options] = Array.isArray(plugin) ? plugin : [plugin, {}];
    if (!pluginMap.has(name)) pluginMap.set(name, options || {});
  }

  return pluginMap;
}

function parse(input, options) {
  var _options;

  if (((_options = options) == null ? void 0 : _options.sourceType) === "unambiguous") {
    options = Object.assign({}, options);

    try {
      options.sourceType = "module";
      const parser = getParser(options, input);
      const ast = parser.parse();

      if (parser.sawUnambiguousESM) {
        return ast;
      }

      if (parser.ambiguousScriptDifferentAst) {
        try {
          options.sourceType = "script";
          return getParser(options, input).parse();
        } catch (_unused) {}
      } else {
        ast.program.sourceType = "script";
      }

      return ast;
    } catch (moduleError) {
      try {
        options.sourceType = "script";
        return getParser(options, input).parse();
      } catch (_unused2) {}

      throw moduleError;
    }
  } else {
    return getParser(options, input).parse();
  }
}
function parseExpression(input, options) {
  const parser = getParser(options, input);

  if (parser.options.strictMode) {
    parser.state.strict = true;
  }

  return parser.getExpression();
}

function generateExportedTokenTypes(internalTokenTypes) {
  const tokenTypes = {};

  for (const typeName of Object.keys(internalTokenTypes)) {
    tokenTypes[typeName] = getExportedToken(internalTokenTypes[typeName]);
  }

  return tokenTypes;
}

const tokTypes = generateExportedTokenTypes(tt);

function getParser(options, input) {
  let cls = Parser;

  if (options != null && options.plugins) {
    validatePlugins(options.plugins);
    cls = getParserClass(options.plugins);
  }

  return new cls(options, input);
}

const parserClassCache = {};

function getParserClass(pluginsFromOptions) {
  const pluginList = mixinPluginNames.filter(name => hasPlugin(pluginsFromOptions, name));
  const key = pluginList.join("/");
  let cls = parserClassCache[key];

  if (!cls) {
    cls = Parser;

    for (const plugin of pluginList) {
      cls = mixinPlugins[plugin](cls);
    }

    parserClassCache[key] = cls;
  }

  return cls;
}

var parse_1 = parse;
var parseExpression_1 = parseExpression;
var tokTypes_1 = tokTypes;
//# sourceMappingURL=index.js.map

/*#__PURE__*/Object.defineProperty({
	parse: parse_1,
	parseExpression: parseExpression_1,
	tokTypes: tokTypes_1
}, '__esModule', {value: true});

const isStaticExp = (p) => p.type === 4 /* SIMPLE_EXPRESSION */ && p.isStatic;
const isBuiltInType = (tag, expected) => tag === expected || tag === hyphenate(expected);
function isCoreComponent(tag) {
    if (isBuiltInType(tag, 'Teleport')) {
        return TELEPORT;
    }
    else if (isBuiltInType(tag, 'Suspense')) {
        return SUSPENSE;
    }
    else if (isBuiltInType(tag, 'KeepAlive')) {
        return KEEP_ALIVE;
    }
    else if (isBuiltInType(tag, 'BaseTransition')) {
        return BASE_TRANSITION;
    }
}
const nonIdentifierRE = /^\d|[^\$\w]/;
const isSimpleIdentifier = (name) => !nonIdentifierRE.test(name);
const validFirstIdentCharRE = /[A-Za-z_$\xA0-\uFFFF]/;
const validIdentCharRE = /[\.\?\w$\xA0-\uFFFF]/;
const whitespaceRE = /\s+[.[]\s*|\s*[.[]\s+/g;
/**
 * Simple lexer to check if an expression is a member expression. This is
 * lax and only checks validity at the root level (i.e. does not validate exps
 * inside square brackets), but it's ok since these are only used on template
 * expressions and false positives are invalid expressions in the first place.
 */
const isMemberExpressionBrowser = (path) => {
    // remove whitespaces around . or [ first
    path = path.trim().replace(whitespaceRE, s => s.trim());
    let state = 0 /* inMemberExp */;
    let stateStack = [];
    let currentOpenBracketCount = 0;
    let currentOpenParensCount = 0;
    let currentStringType = null;
    for (let i = 0; i < path.length; i++) {
        const char = path.charAt(i);
        switch (state) {
            case 0 /* inMemberExp */:
                if (char === '[') {
                    stateStack.push(state);
                    state = 1 /* inBrackets */;
                    currentOpenBracketCount++;
                }
                else if (char === '(') {
                    stateStack.push(state);
                    state = 2 /* inParens */;
                    currentOpenParensCount++;
                }
                else if (!(i === 0 ? validFirstIdentCharRE : validIdentCharRE).test(char)) {
                    return false;
                }
                break;
            case 1 /* inBrackets */:
                if (char === `'` || char === `"` || char === '`') {
                    stateStack.push(state);
                    state = 3 /* inString */;
                    currentStringType = char;
                }
                else if (char === `[`) {
                    currentOpenBracketCount++;
                }
                else if (char === `]`) {
                    if (!--currentOpenBracketCount) {
                        state = stateStack.pop();
                    }
                }
                break;
            case 2 /* inParens */:
                if (char === `'` || char === `"` || char === '`') {
                    stateStack.push(state);
                    state = 3 /* inString */;
                    currentStringType = char;
                }
                else if (char === `(`) {
                    currentOpenParensCount++;
                }
                else if (char === `)`) {
                    // if the exp ends as a call then it should not be considered valid
                    if (i === path.length - 1) {
                        return false;
                    }
                    if (!--currentOpenParensCount) {
                        state = stateStack.pop();
                    }
                }
                break;
            case 3 /* inString */:
                if (char === currentStringType) {
                    state = stateStack.pop();
                    currentStringType = null;
                }
                break;
        }
    }
    return !currentOpenBracketCount && !currentOpenParensCount;
};
const isMemberExpressionNode = (path, context) => {
        try {
            let ret = parseExpression_1(path, {
                plugins: context.expressionPlugins
            });
            if (ret.type === 'TSAsExpression' || ret.type === 'TSTypeAssertion') {
                ret = ret.expression;
            }
            return (ret.type === 'MemberExpression' ||
                ret.type === 'OptionalMemberExpression' ||
                ret.type === 'Identifier');
        }
        catch (e) {
            return false;
        }
    };
const isMemberExpression = isMemberExpressionNode;
function getInnerRange(loc, offset, length) {
    const source = loc.source.slice(offset, offset + length);
    const newLoc = {
        source,
        start: advancePositionWithClone(loc.start, loc.source, offset),
        end: loc.end
    };
    if (length != null) {
        newLoc.end = advancePositionWithClone(loc.start, loc.source, offset + length);
    }
    return newLoc;
}
function advancePositionWithClone(pos, source, numberOfCharacters = source.length) {
    return advancePositionWithMutation(extend({}, pos), source, numberOfCharacters);
}
// advance by mutation without cloning (for performance reasons), since this
// gets called a lot in the parser
function advancePositionWithMutation(pos, source, numberOfCharacters = source.length) {
    let linesCount = 0;
    let lastNewLinePos = -1;
    for (let i = 0; i < numberOfCharacters; i++) {
        if (source.charCodeAt(i) === 10 /* newline char code */) {
            linesCount++;
            lastNewLinePos = i;
        }
    }
    pos.offset += numberOfCharacters;
    pos.line += linesCount;
    pos.column =
        lastNewLinePos === -1
            ? pos.column + numberOfCharacters
            : numberOfCharacters - lastNewLinePos;
    return pos;
}
function assert$1(condition, msg) {
    /* istanbul ignore if */
    if (!condition) {
        throw new Error(msg || `unexpected compiler condition`);
    }
}
function findDir(node, name, allowEmpty = false) {
    for (let i = 0; i < node.props.length; i++) {
        const p = node.props[i];
        if (p.type === 7 /* DIRECTIVE */ &&
            (allowEmpty || p.exp) &&
            (isString(name) ? p.name === name : name.test(p.name))) {
            return p;
        }
    }
}
function findProp(node, name, dynamicOnly = false, allowEmpty = false) {
    for (let i = 0; i < node.props.length; i++) {
        const p = node.props[i];
        if (p.type === 6 /* ATTRIBUTE */) {
            if (dynamicOnly)
                continue;
            if (p.name === name && (p.value || allowEmpty)) {
                return p;
            }
        }
        else if (p.name === 'bind' &&
            (p.exp || allowEmpty) &&
            isStaticArgOf(p.arg, name)) {
            return p;
        }
    }
}
function isStaticArgOf(arg, name) {
    return !!(arg && isStaticExp(arg) && arg.content === name);
}
function hasDynamicKeyVBind(node) {
    return node.props.some(p => p.type === 7 /* DIRECTIVE */ &&
        p.name === 'bind' &&
        (!p.arg || // v-bind="obj"
            p.arg.type !== 4 /* SIMPLE_EXPRESSION */ || // v-bind:[_ctx.foo]
            !p.arg.isStatic) // v-bind:[foo]
    );
}
function isText(node) {
    return node.type === 5 /* INTERPOLATION */ || node.type === 2 /* TEXT */;
}
function isVSlot(p) {
    return p.type === 7 /* DIRECTIVE */ && p.name === 'slot';
}
function isTemplateNode(node) {
    return (node.type === 1 /* ELEMENT */ && node.tagType === 3 /* TEMPLATE */);
}
function isSlotOutlet(node) {
    return node.type === 1 /* ELEMENT */ && node.tagType === 2 /* SLOT */;
}
function getVNodeHelper(ssr, isComponent) {
    return ssr || isComponent ? CREATE_VNODE : CREATE_ELEMENT_VNODE;
}
function getVNodeBlockHelper(ssr, isComponent) {
    return ssr || isComponent ? CREATE_BLOCK : CREATE_ELEMENT_BLOCK;
}
const propsHelperSet = new Set([NORMALIZE_PROPS, GUARD_REACTIVE_PROPS]);
function getUnnormalizedProps(props, callPath = []) {
    if (props &&
        !isString(props) &&
        props.type === 14 /* JS_CALL_EXPRESSION */) {
        const callee = props.callee;
        if (!isString(callee) && propsHelperSet.has(callee)) {
            return getUnnormalizedProps(props.arguments[0], callPath.concat(props));
        }
    }
    return [props, callPath];
}
function injectProp(node, prop, context) {
    let propsWithInjection;
    /**
     * 1. mergeProps(...)
     * 2. toHandlers(...)
     * 3. normalizeProps(...)
     * 4. normalizeProps(guardReactiveProps(...))
     *
     * we need to get the real props before normalization
     */
    let props = node.type === 13 /* VNODE_CALL */ ? node.props : node.arguments[2];
    let callPath = [];
    let parentCall;
    if (props &&
        !isString(props) &&
        props.type === 14 /* JS_CALL_EXPRESSION */) {
        const ret = getUnnormalizedProps(props);
        props = ret[0];
        callPath = ret[1];
        parentCall = callPath[callPath.length - 1];
    }
    if (props == null || isString(props)) {
        propsWithInjection = createObjectExpression([prop]);
    }
    else if (props.type === 14 /* JS_CALL_EXPRESSION */) {
        // merged props... add ours
        // only inject key to object literal if it's the first argument so that
        // if doesn't override user provided keys
        const first = props.arguments[0];
        if (!isString(first) && first.type === 15 /* JS_OBJECT_EXPRESSION */) {
            first.properties.unshift(prop);
        }
        else {
            if (props.callee === TO_HANDLERS) {
                // #2366
                propsWithInjection = createCallExpression(context.helper(MERGE_PROPS), [
                    createObjectExpression([prop]),
                    props
                ]);
            }
            else {
                props.arguments.unshift(createObjectExpression([prop]));
            }
        }
        !propsWithInjection && (propsWithInjection = props);
    }
    else if (props.type === 15 /* JS_OBJECT_EXPRESSION */) {
        let alreadyExists = false;
        // check existing key to avoid overriding user provided keys
        if (prop.key.type === 4 /* SIMPLE_EXPRESSION */) {
            const propKeyName = prop.key.content;
            alreadyExists = props.properties.some(p => p.key.type === 4 /* SIMPLE_EXPRESSION */ &&
                p.key.content === propKeyName);
        }
        if (!alreadyExists) {
            props.properties.unshift(prop);
        }
        propsWithInjection = props;
    }
    else {
        // single v-bind with expression, return a merged replacement
        propsWithInjection = createCallExpression(context.helper(MERGE_PROPS), [
            createObjectExpression([prop]),
            props
        ]);
        // in the case of nested helper call, e.g. `normalizeProps(guardReactiveProps(props))`,
        // it will be rewritten as `normalizeProps(mergeProps({ key: 0 }, props))`,
        // the `guardReactiveProps` will no longer be needed
        if (parentCall && parentCall.callee === GUARD_REACTIVE_PROPS) {
            parentCall = callPath[callPath.length - 2];
        }
    }
    if (node.type === 13 /* VNODE_CALL */) {
        if (parentCall) {
            parentCall.arguments[0] = propsWithInjection;
        }
        else {
            node.props = propsWithInjection;
        }
    }
    else {
        if (parentCall) {
            parentCall.arguments[0] = propsWithInjection;
        }
        else {
            node.arguments[2] = propsWithInjection;
        }
    }
}
function toValidAssetId(name, type) {
    // see issue#4422, we need adding identifier on validAssetId if variable `name` has specific character
    return `_${type}_${name.replace(/[^\w]/g, (searchValue, replaceValue) => {
        return searchValue === '-' ? '_' : name.charCodeAt(replaceValue).toString();
    })}`;
}
// Check if a node contains expressions that reference current context scope ids
function hasScopeRef(node, ids) {
    if (!node || Object.keys(ids).length === 0) {
        return false;
    }
    switch (node.type) {
        case 1 /* ELEMENT */:
            for (let i = 0; i < node.props.length; i++) {
                const p = node.props[i];
                if (p.type === 7 /* DIRECTIVE */ &&
                    (hasScopeRef(p.arg, ids) || hasScopeRef(p.exp, ids))) {
                    return true;
                }
            }
            return node.children.some(c => hasScopeRef(c, ids));
        case 11 /* FOR */:
            if (hasScopeRef(node.source, ids)) {
                return true;
            }
            return node.children.some(c => hasScopeRef(c, ids));
        case 9 /* IF */:
            return node.branches.some(b => hasScopeRef(b, ids));
        case 10 /* IF_BRANCH */:
            if (hasScopeRef(node.condition, ids)) {
                return true;
            }
            return node.children.some(c => hasScopeRef(c, ids));
        case 4 /* SIMPLE_EXPRESSION */:
            return (!node.isStatic &&
                isSimpleIdentifier(node.content) &&
                !!ids[node.content]);
        case 8 /* COMPOUND_EXPRESSION */:
            return node.children.some(c => isObject(c) && hasScopeRef(c, ids));
        case 5 /* INTERPOLATION */:
        case 12 /* TEXT_CALL */:
            return hasScopeRef(node.content, ids);
        case 2 /* TEXT */:
        case 3 /* COMMENT */:
            return false;
        default:
            return false;
    }
}
function getMemoedVNodeCall(node) {
    if (node.type === 14 /* JS_CALL_EXPRESSION */ && node.callee === WITH_MEMO) {
        return node.arguments[1].returns;
    }
    else {
        return node;
    }
}
function makeBlock(node, { helper, removeHelper, inSSR }) {
    if (!node.isBlock) {
        node.isBlock = true;
        removeHelper(getVNodeHelper(inSSR, node.isComponent));
        helper(OPEN_BLOCK);
        helper(getVNodeBlockHelper(inSSR, node.isComponent));
    }
}

const deprecationData = {
    ["COMPILER_IS_ON_ELEMENT" /* COMPILER_IS_ON_ELEMENT */]: {
        message: `Platform-native elements with "is" prop will no longer be ` +
            `treated as components in Vue 3 unless the "is" value is explicitly ` +
            `prefixed with "vue:".`,
        link: `https://v3-migration.vuejs.org/breaking-changes/custom-elements-interop.html`
    },
    ["COMPILER_V_BIND_SYNC" /* COMPILER_V_BIND_SYNC */]: {
        message: key => `.sync modifier for v-bind has been removed. Use v-model with ` +
            `argument instead. \`v-bind:${key}.sync\` should be changed to ` +
            `\`v-model:${key}\`.`,
        link: `https://v3-migration.vuejs.org/breaking-changes/v-model.html`
    },
    ["COMPILER_V_BIND_PROP" /* COMPILER_V_BIND_PROP */]: {
        message: `.prop modifier for v-bind has been removed and no longer necessary. ` +
            `Vue 3 will automatically set a binding as DOM property when appropriate.`
    },
    ["COMPILER_V_BIND_OBJECT_ORDER" /* COMPILER_V_BIND_OBJECT_ORDER */]: {
        message: `v-bind="obj" usage is now order sensitive and behaves like JavaScript ` +
            `object spread: it will now overwrite an existing non-mergeable attribute ` +
            `that appears before v-bind in the case of conflict. ` +
            `To retain 2.x behavior, move v-bind to make it the first attribute. ` +
            `You can also suppress this warning if the usage is intended.`,
        link: `https://v3-migration.vuejs.org/breaking-changes/v-bind.html`
    },
    ["COMPILER_V_ON_NATIVE" /* COMPILER_V_ON_NATIVE */]: {
        message: `.native modifier for v-on has been removed as is no longer necessary.`,
        link: `https://v3-migration.vuejs.org/breaking-changes/v-on-native-modifier-removed.html`
    },
    ["COMPILER_V_IF_V_FOR_PRECEDENCE" /* COMPILER_V_IF_V_FOR_PRECEDENCE */]: {
        message: `v-if / v-for precedence when used on the same element has changed ` +
            `in Vue 3: v-if now takes higher precedence and will no longer have ` +
            `access to v-for scope variables. It is best to avoid the ambiguity ` +
            `with <template> tags or use a computed property that filters v-for ` +
            `data source.`,
        link: `https://v3-migration.vuejs.org/breaking-changes/v-if-v-for.html`
    },
    ["COMPILER_NATIVE_TEMPLATE" /* COMPILER_NATIVE_TEMPLATE */]: {
        message: `<template> with no special directives will render as a native template ` +
            `element instead of its inner content in Vue 3.`
    },
    ["COMPILER_INLINE_TEMPLATE" /* COMPILER_INLINE_TEMPLATE */]: {
        message: `"inline-template" has been removed in Vue 3.`,
        link: `https://v3-migration.vuejs.org/breaking-changes/inline-template-attribute.html`
    },
    ["COMPILER_FILTER" /* COMPILER_FILTERS */]: {
        message: `filters have been removed in Vue 3. ` +
            `The "|" symbol will be treated as native JavaScript bitwise OR operator. ` +
            `Use method calls or computed properties instead.`,
        link: `https://v3-migration.vuejs.org/breaking-changes/filters.html`
    }
};
function getCompatValue(key, context) {
    const config = context.options
        ? context.options.compatConfig
        : context.compatConfig;
    const value = config && config[key];
    if (key === 'MODE') {
        return value || 3; // compiler defaults to v3 behavior
    }
    else {
        return value;
    }
}
function isCompatEnabled(key, context) {
    const mode = getCompatValue('MODE', context);
    const value = getCompatValue(key, context);
    // in v3 mode, only enable if explicitly set to true
    // otherwise enable for any non-false value
    return mode === 3 ? value === true : value !== false;
}
function checkCompatEnabled(key, context, loc, ...args) {
    const enabled = isCompatEnabled(key, context);
    if (enabled) {
        warnDeprecation(key, context, loc, ...args);
    }
    return enabled;
}
function warnDeprecation(key, context, loc, ...args) {
    const val = getCompatValue(key, context);
    if (val === 'suppress-warning') {
        return;
    }
    const { message, link } = deprecationData[key];
    const msg = `(deprecation ${key}) ${typeof message === 'function' ? message(...args) : message}${link ? `\n  Details: ${link}` : ``}`;
    const err = new SyntaxError(msg);
    err.code = key;
    if (loc)
        err.loc = loc;
    context.onWarn(err);
}

// The default decoder only provides escapes for characters reserved as part of
// the template syntax, and is only used if the custom renderer did not provide
// a platform-specific decoder.
const decodeRE = /&(gt|lt|amp|apos|quot);/g;
const decodeMap = {
    gt: '>',
    lt: '<',
    amp: '&',
    apos: "'",
    quot: '"'
};
const defaultParserOptions = {
    delimiters: [`{{`, `}}`],
    getNamespace: () => 0 /* HTML */,
    getTextMode: () => 0 /* DATA */,
    isVoidTag: NO,
    isPreTag: NO,
    isCustomElement: NO,
    decodeEntities: (rawText) => rawText.replace(decodeRE, (_, p1) => decodeMap[p1]),
    onError: defaultOnError,
    onWarn: defaultOnWarn,
    comments: true
};
function baseParse(content, options = {}) {
    const context = createParserContext(content, options);
    const start = getCursor(context);
    return createRoot(parseChildren(context, 0 /* DATA */, []), getSelection(context, start));
}
function createParserContext(content, rawOptions) {
    const options = extend({}, defaultParserOptions);
    let key;
    for (key in rawOptions) {
        // @ts-ignore
        options[key] =
            rawOptions[key] === undefined
                ? defaultParserOptions[key]
                : rawOptions[key];
    }
    return {
        options,
        column: 1,
        line: 1,
        offset: 0,
        originalSource: content,
        source: content,
        inPre: false,
        inVPre: false,
        onWarn: options.onWarn
    };
}
function parseChildren(context, mode, ancestors) {
    const parent = last(ancestors);
    const ns = parent ? parent.ns : 0 /* HTML */;
    const nodes = [];
    while (!isEnd(context, mode, ancestors)) {
        const s = context.source;
        let node = undefined;
        if (mode === 0 /* DATA */ || mode === 1 /* RCDATA */) {
            if (!context.inVPre && startsWith(s, context.options.delimiters[0])) {
                // '{{'
                node = parseInterpolation(context, mode);
            }
            else if (mode === 0 /* DATA */ && s[0] === '<') {
                // https://html.spec.whatwg.org/multipage/parsing.html#tag-open-state
                if (s.length === 1) {
                    emitError(context, 5 /* EOF_BEFORE_TAG_NAME */, 1);
                }
                else if (s[1] === '!') {
                    // https://html.spec.whatwg.org/multipage/parsing.html#markup-declaration-open-state
                    if (startsWith(s, '<!--')) {
                        node = parseComment(context);
                    }
                    else if (startsWith(s, '<!DOCTYPE')) {
                        // Ignore DOCTYPE by a limitation.
                        node = parseBogusComment(context);
                    }
                    else if (startsWith(s, '<![CDATA[')) {
                        if (ns !== 0 /* HTML */) {
                            node = parseCDATA(context, ancestors);
                        }
                        else {
                            emitError(context, 1 /* CDATA_IN_HTML_CONTENT */);
                            node = parseBogusComment(context);
                        }
                    }
                    else {
                        emitError(context, 11 /* INCORRECTLY_OPENED_COMMENT */);
                        node = parseBogusComment(context);
                    }
                }
                else if (s[1] === '/') {
                    // https://html.spec.whatwg.org/multipage/parsing.html#end-tag-open-state
                    if (s.length === 2) {
                        emitError(context, 5 /* EOF_BEFORE_TAG_NAME */, 2);
                    }
                    else if (s[2] === '>') {
                        emitError(context, 14 /* MISSING_END_TAG_NAME */, 2);
                        advanceBy(context, 3);
                        continue;
                    }
                    else if (/[a-z]/i.test(s[2])) {
                        emitError(context, 23 /* X_INVALID_END_TAG */);
                        parseTag(context, 1 /* End */, parent);
                        continue;
                    }
                    else {
                        emitError(context, 12 /* INVALID_FIRST_CHARACTER_OF_TAG_NAME */, 2);
                        node = parseBogusComment(context);
                    }
                }
                else if (/[a-z]/i.test(s[1])) {
                    node = parseElement(context, ancestors);
                }
                else if (s[1] === '?') {
                    emitError(context, 21 /* UNEXPECTED_QUESTION_MARK_INSTEAD_OF_TAG_NAME */, 1);
                    node = parseBogusComment(context);
                }
                else {
                    emitError(context, 12 /* INVALID_FIRST_CHARACTER_OF_TAG_NAME */, 1);
                }
            }
        }
        if (!node) {
            node = parseText(context, mode);
        }
        if (isArray(node)) {
            for (let i = 0; i < node.length; i++) {
                pushNode(nodes, node[i]);
            }
        }
        else {
            pushNode(nodes, node);
        }
    }
    // Whitespace handling strategy like v2
    let removedWhitespace = false;
    if (mode !== 2 /* RAWTEXT */ && mode !== 1 /* RCDATA */) {
        const shouldCondense = context.options.whitespace !== 'preserve';
        for (let i = 0; i < nodes.length; i++) {
            const node = nodes[i];
            if (!context.inPre && node.type === 2 /* TEXT */) {
                if (!/[^\t\r\n\f ]/.test(node.content)) {
                    const prev = nodes[i - 1];
                    const next = nodes[i + 1];
                    // Remove if:
                    // - the whitespace is the first or last node, or:
                    // - (condense mode) the whitespace is adjacent to a comment, or:
                    // - (condense mode) the whitespace is between two elements AND contains newline
                    if (!prev ||
                        !next ||
                        (shouldCondense &&
                            (prev.type === 3 /* COMMENT */ ||
                                next.type === 3 /* COMMENT */ ||
                                (prev.type === 1 /* ELEMENT */ &&
                                    next.type === 1 /* ELEMENT */ &&
                                    /[\r\n]/.test(node.content))))) {
                        removedWhitespace = true;
                        nodes[i] = null;
                    }
                    else {
                        // Otherwise, the whitespace is condensed into a single space
                        node.content = ' ';
                    }
                }
                else if (shouldCondense) {
                    // in condense mode, consecutive whitespaces in text are condensed
                    // down to a single space.
                    node.content = node.content.replace(/[\t\r\n\f ]+/g, ' ');
                }
            }
            // Remove comment nodes if desired by configuration.
            else if (node.type === 3 /* COMMENT */ && !context.options.comments) {
                removedWhitespace = true;
                nodes[i] = null;
            }
        }
        if (context.inPre && parent && context.options.isPreTag(parent.tag)) {
            // remove leading newline per html spec
            // https://html.spec.whatwg.org/multipage/grouping-content.html#the-pre-element
            const first = nodes[0];
            if (first && first.type === 2 /* TEXT */) {
                first.content = first.content.replace(/^\r?\n/, '');
            }
        }
    }
    return removedWhitespace ? nodes.filter(Boolean) : nodes;
}
function pushNode(nodes, node) {
    if (node.type === 2 /* TEXT */) {
        const prev = last(nodes);
        // Merge if both this and the previous node are text and those are
        // consecutive. This happens for cases like "a < b".
        if (prev &&
            prev.type === 2 /* TEXT */ &&
            prev.loc.end.offset === node.loc.start.offset) {
            prev.content += node.content;
            prev.loc.end = node.loc.end;
            prev.loc.source += node.loc.source;
            return;
        }
    }
    nodes.push(node);
}
function parseCDATA(context, ancestors) {
    advanceBy(context, 9);
    const nodes = parseChildren(context, 3 /* CDATA */, ancestors);
    if (context.source.length === 0) {
        emitError(context, 6 /* EOF_IN_CDATA */);
    }
    else {
        advanceBy(context, 3);
    }
    return nodes;
}
function parseComment(context) {
    const start = getCursor(context);
    let content;
    // Regular comment.
    const match = /--(\!)?>/.exec(context.source);
    if (!match) {
        content = context.source.slice(4);
        advanceBy(context, context.source.length);
        emitError(context, 7 /* EOF_IN_COMMENT */);
    }
    else {
        if (match.index <= 3) {
            emitError(context, 0 /* ABRUPT_CLOSING_OF_EMPTY_COMMENT */);
        }
        if (match[1]) {
            emitError(context, 10 /* INCORRECTLY_CLOSED_COMMENT */);
        }
        content = context.source.slice(4, match.index);
        // Advancing with reporting nested comments.
        const s = context.source.slice(0, match.index);
        let prevIndex = 1, nestedIndex = 0;
        while ((nestedIndex = s.indexOf('<!--', prevIndex)) !== -1) {
            advanceBy(context, nestedIndex - prevIndex + 1);
            if (nestedIndex + 4 < s.length) {
                emitError(context, 16 /* NESTED_COMMENT */);
            }
            prevIndex = nestedIndex + 1;
        }
        advanceBy(context, match.index + match[0].length - prevIndex + 1);
    }
    return {
        type: 3 /* COMMENT */,
        content,
        loc: getSelection(context, start)
    };
}
function parseBogusComment(context) {
    const start = getCursor(context);
    const contentStart = context.source[1] === '?' ? 1 : 2;
    let content;
    const closeIndex = context.source.indexOf('>');
    if (closeIndex === -1) {
        content = context.source.slice(contentStart);
        advanceBy(context, context.source.length);
    }
    else {
        content = context.source.slice(contentStart, closeIndex);
        advanceBy(context, closeIndex + 1);
    }
    return {
        type: 3 /* COMMENT */,
        content,
        loc: getSelection(context, start)
    };
}
function parseElement(context, ancestors) {
    // Start tag.
    const wasInPre = context.inPre;
    const wasInVPre = context.inVPre;
    const parent = last(ancestors);
    const element = parseTag(context, 0 /* Start */, parent);
    const isPreBoundary = context.inPre && !wasInPre;
    const isVPreBoundary = context.inVPre && !wasInVPre;
    if (element.isSelfClosing || context.options.isVoidTag(element.tag)) {
        // #4030 self-closing <pre> tag
        if (isPreBoundary) {
            context.inPre = false;
        }
        if (isVPreBoundary) {
            context.inVPre = false;
        }
        return element;
    }
    // Children.
    ancestors.push(element);
    const mode = context.options.getTextMode(element, parent);
    const children = parseChildren(context, mode, ancestors);
    ancestors.pop();
    element.children = children;
    // End tag.
    if (startsWithEndTagOpen(context.source, element.tag)) {
        parseTag(context, 1 /* End */, parent);
    }
    else {
        emitError(context, 24 /* X_MISSING_END_TAG */, 0, element.loc.start);
        if (context.source.length === 0 && element.tag.toLowerCase() === 'script') {
            const first = children[0];
            if (first && startsWith(first.loc.source, '<!--')) {
                emitError(context, 8 /* EOF_IN_SCRIPT_HTML_COMMENT_LIKE_TEXT */);
            }
        }
    }
    element.loc = getSelection(context, element.loc.start);
    if (isPreBoundary) {
        context.inPre = false;
    }
    if (isVPreBoundary) {
        context.inVPre = false;
    }
    return element;
}
const isSpecialTemplateDirective = /*#__PURE__*/ makeMap(`if,else,else-if,for,slot`);
function parseTag(context, type, parent) {
    // Tag open.
    const start = getCursor(context);
    const match = /^<\/?([a-z][^\t\r\n\f />]*)/i.exec(context.source);
    const tag = match[1];
    const ns = context.options.getNamespace(tag, parent);
    advanceBy(context, match[0].length);
    advanceSpaces(context);
    // save current state in case we need to re-parse attributes with v-pre
    const cursor = getCursor(context);
    const currentSource = context.source;
    // check <pre> tag
    if (context.options.isPreTag(tag)) {
        context.inPre = true;
    }
    // Attributes.
    let props = parseAttributes(context, type);
    // check v-pre
    if (type === 0 /* Start */ &&
        !context.inVPre &&
        props.some(p => p.type === 7 /* DIRECTIVE */ && p.name === 'pre')) {
        context.inVPre = true;
        // reset context
        extend(context, cursor);
        context.source = currentSource;
        // re-parse attrs and filter out v-pre itself
        props = parseAttributes(context, type).filter(p => p.name !== 'v-pre');
    }
    // Tag close.
    let isSelfClosing = false;
    if (context.source.length === 0) {
        emitError(context, 9 /* EOF_IN_TAG */);
    }
    else {
        isSelfClosing = startsWith(context.source, '/>');
        if (type === 1 /* End */ && isSelfClosing) {
            emitError(context, 4 /* END_TAG_WITH_TRAILING_SOLIDUS */);
        }
        advanceBy(context, isSelfClosing ? 2 : 1);
    }
    if (type === 1 /* End */) {
        return;
    }
    let tagType = 0 /* ELEMENT */;
    if (!context.inVPre) {
        if (tag === 'slot') {
            tagType = 2 /* SLOT */;
        }
        else if (tag === 'template') {
            if (props.some(p => p.type === 7 /* DIRECTIVE */ && isSpecialTemplateDirective(p.name))) {
                tagType = 3 /* TEMPLATE */;
            }
        }
        else if (isComponent(tag, props, context)) {
            tagType = 1 /* COMPONENT */;
        }
    }
    return {
        type: 1 /* ELEMENT */,
        ns,
        tag,
        tagType,
        props,
        isSelfClosing,
        children: [],
        loc: getSelection(context, start),
        codegenNode: undefined // to be created during transform phase
    };
}
function isComponent(tag, props, context) {
    const options = context.options;
    if (options.isCustomElement(tag)) {
        return false;
    }
    if (tag === 'component' ||
        /^[A-Z]/.test(tag) ||
        isCoreComponent(tag) ||
        (options.isBuiltInComponent && options.isBuiltInComponent(tag)) ||
        (options.isNativeTag && !options.isNativeTag(tag))) {
        return true;
    }
    // at this point the tag should be a native tag, but check for potential "is"
    // casting
    for (let i = 0; i < props.length; i++) {
        const p = props[i];
        if (p.type === 6 /* ATTRIBUTE */) {
            if (p.name === 'is' && p.value) {
                if (p.value.content.startsWith('vue:')) {
                    return true;
                }
            }
        }
        else {
            // directive
            // v-is (TODO Deprecate)
            if (p.name === 'is') {
                return true;
            }
            else if (
            // :is on plain element - only treat as component in compat mode
            p.name === 'bind' &&
                isStaticArgOf(p.arg, 'is') &&
                false &&
                checkCompatEnabled("COMPILER_IS_ON_ELEMENT" /* COMPILER_IS_ON_ELEMENT */, context, p.loc)) {
                return true;
            }
        }
    }
}
function parseAttributes(context, type) {
    const props = [];
    const attributeNames = new Set();
    while (context.source.length > 0 &&
        !startsWith(context.source, '>') &&
        !startsWith(context.source, '/>')) {
        if (startsWith(context.source, '/')) {
            emitError(context, 22 /* UNEXPECTED_SOLIDUS_IN_TAG */);
            advanceBy(context, 1);
            advanceSpaces(context);
            continue;
        }
        if (type === 1 /* End */) {
            emitError(context, 3 /* END_TAG_WITH_ATTRIBUTES */);
        }
        const attr = parseAttribute(context, attributeNames);
        // Trim whitespace between class
        // https://github.com/vuejs/core/issues/4251
        if (attr.type === 6 /* ATTRIBUTE */ &&
            attr.value &&
            attr.name === 'class') {
            attr.value.content = attr.value.content.replace(/\s+/g, ' ').trim();
        }
        if (type === 0 /* Start */) {
            props.push(attr);
        }
        if (/^[^\t\r\n\f />]/.test(context.source)) {
            emitError(context, 15 /* MISSING_WHITESPACE_BETWEEN_ATTRIBUTES */);
        }
        advanceSpaces(context);
    }
    return props;
}
function parseAttribute(context, nameSet) {
    // Name.
    const start = getCursor(context);
    const match = /^[^\t\r\n\f />][^\t\r\n\f />=]*/.exec(context.source);
    const name = match[0];
    if (nameSet.has(name)) {
        emitError(context, 2 /* DUPLICATE_ATTRIBUTE */);
    }
    nameSet.add(name);
    if (name[0] === '=') {
        emitError(context, 19 /* UNEXPECTED_EQUALS_SIGN_BEFORE_ATTRIBUTE_NAME */);
    }
    {
        const pattern = /["'<]/g;
        let m;
        while ((m = pattern.exec(name))) {
            emitError(context, 17 /* UNEXPECTED_CHARACTER_IN_ATTRIBUTE_NAME */, m.index);
        }
    }
    advanceBy(context, name.length);
    // Value
    let value = undefined;
    if (/^[\t\r\n\f ]*=/.test(context.source)) {
        advanceSpaces(context);
        advanceBy(context, 1);
        advanceSpaces(context);
        value = parseAttributeValue(context);
        if (!value) {
            emitError(context, 13 /* MISSING_ATTRIBUTE_VALUE */);
        }
    }
    const loc = getSelection(context, start);
    if (!context.inVPre && /^(v-[A-Za-z0-9-]|:|\.|@|#)/.test(name)) {
        const match = /(?:^v-([a-z0-9-]+))?(?:(?::|^\.|^@|^#)(\[[^\]]+\]|[^\.]+))?(.+)?$/i.exec(name);
        let isPropShorthand = startsWith(name, '.');
        let dirName = match[1] ||
            (isPropShorthand || startsWith(name, ':')
                ? 'bind'
                : startsWith(name, '@')
                    ? 'on'
                    : 'slot');
        let arg;
        if (match[2]) {
            const isSlot = dirName === 'slot';
            const startOffset = name.lastIndexOf(match[2]);
            const loc = getSelection(context, getNewPosition(context, start, startOffset), getNewPosition(context, start, startOffset + match[2].length + ((isSlot && match[3]) || '').length));
            let content = match[2];
            let isStatic = true;
            if (content.startsWith('[')) {
                isStatic = false;
                if (!content.endsWith(']')) {
                    emitError(context, 27 /* X_MISSING_DYNAMIC_DIRECTIVE_ARGUMENT_END */);
                    content = content.slice(1);
                }
                else {
                    content = content.slice(1, content.length - 1);
                }
            }
            else if (isSlot) {
                // #1241 special case for v-slot: vuetify relies extensively on slot
                // names containing dots. v-slot doesn't have any modifiers and Vue 2.x
                // supports such usage so we are keeping it consistent with 2.x.
                content += match[3] || '';
            }
            arg = {
                type: 4 /* SIMPLE_EXPRESSION */,
                content,
                isStatic,
                constType: isStatic
                    ? 3 /* CAN_STRINGIFY */
                    : 0 /* NOT_CONSTANT */,
                loc
            };
        }
        if (value && value.isQuoted) {
            const valueLoc = value.loc;
            valueLoc.start.offset++;
            valueLoc.start.column++;
            valueLoc.end = advancePositionWithClone(valueLoc.start, value.content);
            valueLoc.source = valueLoc.source.slice(1, -1);
        }
        const modifiers = match[3] ? match[3].slice(1).split('.') : [];
        if (isPropShorthand)
            modifiers.push('prop');
        return {
            type: 7 /* DIRECTIVE */,
            name: dirName,
            exp: value && {
                type: 4 /* SIMPLE_EXPRESSION */,
                content: value.content,
                isStatic: false,
                // Treat as non-constant by default. This can be potentially set to
                // other values by `transformExpression` to make it eligible for hoisting.
                constType: 0 /* NOT_CONSTANT */,
                loc: value.loc
            },
            arg,
            modifiers,
            loc
        };
    }
    // missing directive name or illegal directive name
    if (!context.inVPre && startsWith(name, 'v-')) {
        emitError(context, 26 /* X_MISSING_DIRECTIVE_NAME */);
    }
    return {
        type: 6 /* ATTRIBUTE */,
        name,
        value: value && {
            type: 2 /* TEXT */,
            content: value.content,
            loc: value.loc
        },
        loc
    };
}
function parseAttributeValue(context) {
    const start = getCursor(context);
    let content;
    const quote = context.source[0];
    const isQuoted = quote === `"` || quote === `'`;
    if (isQuoted) {
        // Quoted value.
        advanceBy(context, 1);
        const endIndex = context.source.indexOf(quote);
        if (endIndex === -1) {
            content = parseTextData(context, context.source.length, 4 /* ATTRIBUTE_VALUE */);
        }
        else {
            content = parseTextData(context, endIndex, 4 /* ATTRIBUTE_VALUE */);
            advanceBy(context, 1);
        }
    }
    else {
        // Unquoted
        const match = /^[^\t\r\n\f >]+/.exec(context.source);
        if (!match) {
            return undefined;
        }
        const unexpectedChars = /["'<=`]/g;
        let m;
        while ((m = unexpectedChars.exec(match[0]))) {
            emitError(context, 18 /* UNEXPECTED_CHARACTER_IN_UNQUOTED_ATTRIBUTE_VALUE */, m.index);
        }
        content = parseTextData(context, match[0].length, 4 /* ATTRIBUTE_VALUE */);
    }
    return { content, isQuoted, loc: getSelection(context, start) };
}
function parseInterpolation(context, mode) {
    const [open, close] = context.options.delimiters;
    const closeIndex = context.source.indexOf(close, open.length);
    if (closeIndex === -1) {
        emitError(context, 25 /* X_MISSING_INTERPOLATION_END */);
        return undefined;
    }
    const start = getCursor(context);
    advanceBy(context, open.length);
    const innerStart = getCursor(context);
    const innerEnd = getCursor(context);
    const rawContentLength = closeIndex - open.length;
    const rawContent = context.source.slice(0, rawContentLength);
    const preTrimContent = parseTextData(context, rawContentLength, mode);
    const content = preTrimContent.trim();
    const startOffset = preTrimContent.indexOf(content);
    if (startOffset > 0) {
        advancePositionWithMutation(innerStart, rawContent, startOffset);
    }
    const endOffset = rawContentLength - (preTrimContent.length - content.length - startOffset);
    advancePositionWithMutation(innerEnd, rawContent, endOffset);
    advanceBy(context, close.length);
    return {
        type: 5 /* INTERPOLATION */,
        content: {
            type: 4 /* SIMPLE_EXPRESSION */,
            isStatic: false,
            // Set `isConstant` to false by default and will decide in transformExpression
            constType: 0 /* NOT_CONSTANT */,
            content,
            loc: getSelection(context, innerStart, innerEnd)
        },
        loc: getSelection(context, start)
    };
}
function parseText(context, mode) {
    const endTokens = mode === 3 /* CDATA */ ? [']]>'] : ['<', context.options.delimiters[0]];
    let endIndex = context.source.length;
    for (let i = 0; i < endTokens.length; i++) {
        const index = context.source.indexOf(endTokens[i], 1);
        if (index !== -1 && endIndex > index) {
            endIndex = index;
        }
    }
    const start = getCursor(context);
    const content = parseTextData(context, endIndex, mode);
    return {
        type: 2 /* TEXT */,
        content,
        loc: getSelection(context, start)
    };
}
/**
 * Get text data with a given length from the current location.
 * This translates HTML entities in the text data.
 */
function parseTextData(context, length, mode) {
    const rawText = context.source.slice(0, length);
    advanceBy(context, length);
    if (mode === 2 /* RAWTEXT */ ||
        mode === 3 /* CDATA */ ||
        !rawText.includes('&')) {
        return rawText;
    }
    else {
        // DATA or RCDATA containing "&"". Entity decoding required.
        return context.options.decodeEntities(rawText, mode === 4 /* ATTRIBUTE_VALUE */);
    }
}
function getCursor(context) {
    const { column, line, offset } = context;
    return { column, line, offset };
}
function getSelection(context, start, end) {
    end = end || getCursor(context);
    return {
        start,
        end,
        source: context.originalSource.slice(start.offset, end.offset)
    };
}
function last(xs) {
    return xs[xs.length - 1];
}
function startsWith(source, searchString) {
    return source.startsWith(searchString);
}
function advanceBy(context, numberOfCharacters) {
    const { source } = context;
    advancePositionWithMutation(context, source, numberOfCharacters);
    context.source = source.slice(numberOfCharacters);
}
function advanceSpaces(context) {
    const match = /^[\t\r\n\f ]+/.exec(context.source);
    if (match) {
        advanceBy(context, match[0].length);
    }
}
function getNewPosition(context, start, numberOfCharacters) {
    return advancePositionWithClone(start, context.originalSource.slice(start.offset, numberOfCharacters), numberOfCharacters);
}
function emitError(context, code, offset, loc = getCursor(context)) {
    if (offset) {
        loc.offset += offset;
        loc.column += offset;
    }
    context.options.onError(createCompilerError(code, {
        start: loc,
        end: loc,
        source: ''
    }));
}
function isEnd(context, mode, ancestors) {
    const s = context.source;
    switch (mode) {
        case 0 /* DATA */:
            if (startsWith(s, '</')) {
                // TODO: probably bad performance
                for (let i = ancestors.length - 1; i >= 0; --i) {
                    if (startsWithEndTagOpen(s, ancestors[i].tag)) {
                        return true;
                    }
                }
            }
            break;
        case 1 /* RCDATA */:
        case 2 /* RAWTEXT */: {
            const parent = last(ancestors);
            if (parent && startsWithEndTagOpen(s, parent.tag)) {
                return true;
            }
            break;
        }
        case 3 /* CDATA */:
            if (startsWith(s, ']]>')) {
                return true;
            }
            break;
    }
    return !s;
}
function startsWithEndTagOpen(source, tag) {
    return (startsWith(source, '</') &&
        source.slice(2, 2 + tag.length).toLowerCase() === tag.toLowerCase() &&
        /[\t\r\n\f />]/.test(source[2 + tag.length] || '>'));
}

function hoistStatic(root, context) {
    walk(root, context, 
    // Root node is unfortunately non-hoistable due to potential parent
    // fallthrough attributes.
    isSingleElementRoot(root, root.children[0]));
}
function isSingleElementRoot(root, child) {
    const { children } = root;
    return (children.length === 1 &&
        child.type === 1 /* ELEMENT */ &&
        !isSlotOutlet(child));
}
function walk(node, context, doNotHoistNode = false) {
    const { children } = node;
    const originalCount = children.length;
    let hoistedCount = 0;
    for (let i = 0; i < children.length; i++) {
        const child = children[i];
        // only plain elements & text calls are eligible for hoisting.
        if (child.type === 1 /* ELEMENT */ &&
            child.tagType === 0 /* ELEMENT */) {
            const constantType = doNotHoistNode
                ? 0 /* NOT_CONSTANT */
                : getConstantType(child, context);
            if (constantType > 0 /* NOT_CONSTANT */) {
                if (constantType >= 2 /* CAN_HOIST */) {
                    child.codegenNode.patchFlag =
                        -1 /* HOISTED */ + (` /* HOISTED */` );
                    child.codegenNode = context.hoist(child.codegenNode);
                    hoistedCount++;
                    continue;
                }
            }
            else {
                // node may contain dynamic children, but its props may be eligible for
                // hoisting.
                const codegenNode = child.codegenNode;
                if (codegenNode.type === 13 /* VNODE_CALL */) {
                    const flag = getPatchFlag(codegenNode);
                    if ((!flag ||
                        flag === 512 /* NEED_PATCH */ ||
                        flag === 1 /* TEXT */) &&
                        getGeneratedPropsConstantType(child, context) >=
                            2 /* CAN_HOIST */) {
                        const props = getNodeProps(child);
                        if (props) {
                            codegenNode.props = context.hoist(props);
                        }
                    }
                    if (codegenNode.dynamicProps) {
                        codegenNode.dynamicProps = context.hoist(codegenNode.dynamicProps);
                    }
                }
            }
        }
        else if (child.type === 12 /* TEXT_CALL */ &&
            getConstantType(child.content, context) >= 2 /* CAN_HOIST */) {
            child.codegenNode = context.hoist(child.codegenNode);
            hoistedCount++;
        }
        // walk further
        if (child.type === 1 /* ELEMENT */) {
            const isComponent = child.tagType === 1 /* COMPONENT */;
            if (isComponent) {
                context.scopes.vSlot++;
            }
            walk(child, context);
            if (isComponent) {
                context.scopes.vSlot--;
            }
        }
        else if (child.type === 11 /* FOR */) {
            // Do not hoist v-for single child because it has to be a block
            walk(child, context, child.children.length === 1);
        }
        else if (child.type === 9 /* IF */) {
            for (let i = 0; i < child.branches.length; i++) {
                // Do not hoist v-if single child because it has to be a block
                walk(child.branches[i], context, child.branches[i].children.length === 1);
            }
        }
    }
    if (hoistedCount && context.transformHoist) {
        context.transformHoist(children, context, node);
    }
    // all children were hoisted - the entire children array is hoistable.
    if (hoistedCount &&
        hoistedCount === originalCount &&
        node.type === 1 /* ELEMENT */ &&
        node.tagType === 0 /* ELEMENT */ &&
        node.codegenNode &&
        node.codegenNode.type === 13 /* VNODE_CALL */ &&
        isArray(node.codegenNode.children)) {
        node.codegenNode.children = context.hoist(createArrayExpression(node.codegenNode.children));
    }
}
function getConstantType(node, context) {
    const { constantCache } = context;
    switch (node.type) {
        case 1 /* ELEMENT */:
            if (node.tagType !== 0 /* ELEMENT */) {
                return 0 /* NOT_CONSTANT */;
            }
            const cached = constantCache.get(node);
            if (cached !== undefined) {
                return cached;
            }
            const codegenNode = node.codegenNode;
            if (codegenNode.type !== 13 /* VNODE_CALL */) {
                return 0 /* NOT_CONSTANT */;
            }
            if (codegenNode.isBlock &&
                node.tag !== 'svg' &&
                node.tag !== 'foreignObject') {
                return 0 /* NOT_CONSTANT */;
            }
            const flag = getPatchFlag(codegenNode);
            if (!flag) {
                let returnType = 3 /* CAN_STRINGIFY */;
                // Element itself has no patch flag. However we still need to check:
                // 1. Even for a node with no patch flag, it is possible for it to contain
                // non-hoistable expressions that refers to scope variables, e.g. compiler
                // injected keys or cached event handlers. Therefore we need to always
                // check the codegenNode's props to be sure.
                const generatedPropsType = getGeneratedPropsConstantType(node, context);
                if (generatedPropsType === 0 /* NOT_CONSTANT */) {
                    constantCache.set(node, 0 /* NOT_CONSTANT */);
                    return 0 /* NOT_CONSTANT */;
                }
                if (generatedPropsType < returnType) {
                    returnType = generatedPropsType;
                }
                // 2. its children.
                for (let i = 0; i < node.children.length; i++) {
                    const childType = getConstantType(node.children[i], context);
                    if (childType === 0 /* NOT_CONSTANT */) {
                        constantCache.set(node, 0 /* NOT_CONSTANT */);
                        return 0 /* NOT_CONSTANT */;
                    }
                    if (childType < returnType) {
                        returnType = childType;
                    }
                }
                // 3. if the type is not already CAN_SKIP_PATCH which is the lowest non-0
                // type, check if any of the props can cause the type to be lowered
                // we can skip can_patch because it's guaranteed by the absence of a
                // patchFlag.
                if (returnType > 1 /* CAN_SKIP_PATCH */) {
                    for (let i = 0; i < node.props.length; i++) {
                        const p = node.props[i];
                        if (p.type === 7 /* DIRECTIVE */ && p.name === 'bind' && p.exp) {
                            const expType = getConstantType(p.exp, context);
                            if (expType === 0 /* NOT_CONSTANT */) {
                                constantCache.set(node, 0 /* NOT_CONSTANT */);
                                return 0 /* NOT_CONSTANT */;
                            }
                            if (expType < returnType) {
                                returnType = expType;
                            }
                        }
                    }
                }
                // only svg/foreignObject could be block here, however if they are
                // static then they don't need to be blocks since there will be no
                // nested updates.
                if (codegenNode.isBlock) {
                    // except set custom directives.
                    for (let i = 0; i < node.props.length; i++) {
                        const p = node.props[i];
                        if (p.type === 7 /* DIRECTIVE */) {
                            constantCache.set(node, 0 /* NOT_CONSTANT */);
                            return 0 /* NOT_CONSTANT */;
                        }
                    }
                    context.removeHelper(OPEN_BLOCK);
                    context.removeHelper(getVNodeBlockHelper(context.inSSR, codegenNode.isComponent));
                    codegenNode.isBlock = false;
                    context.helper(getVNodeHelper(context.inSSR, codegenNode.isComponent));
                }
                constantCache.set(node, returnType);
                return returnType;
            }
            else {
                constantCache.set(node, 0 /* NOT_CONSTANT */);
                return 0 /* NOT_CONSTANT */;
            }
        case 2 /* TEXT */:
        case 3 /* COMMENT */:
            return 3 /* CAN_STRINGIFY */;
        case 9 /* IF */:
        case 11 /* FOR */:
        case 10 /* IF_BRANCH */:
            return 0 /* NOT_CONSTANT */;
        case 5 /* INTERPOLATION */:
        case 12 /* TEXT_CALL */:
            return getConstantType(node.content, context);
        case 4 /* SIMPLE_EXPRESSION */:
            return node.constType;
        case 8 /* COMPOUND_EXPRESSION */:
            let returnType = 3 /* CAN_STRINGIFY */;
            for (let i = 0; i < node.children.length; i++) {
                const child = node.children[i];
                if (isString(child) || isSymbol(child)) {
                    continue;
                }
                const childType = getConstantType(child, context);
                if (childType === 0 /* NOT_CONSTANT */) {
                    return 0 /* NOT_CONSTANT */;
                }
                else if (childType < returnType) {
                    returnType = childType;
                }
            }
            return returnType;
        default:
            return 0 /* NOT_CONSTANT */;
    }
}
const allowHoistedHelperSet = new Set([
    NORMALIZE_CLASS,
    NORMALIZE_STYLE,
    NORMALIZE_PROPS,
    GUARD_REACTIVE_PROPS
]);
function getConstantTypeOfHelperCall(value, context) {
    if (value.type === 14 /* JS_CALL_EXPRESSION */ &&
        !isString(value.callee) &&
        allowHoistedHelperSet.has(value.callee)) {
        const arg = value.arguments[0];
        if (arg.type === 4 /* SIMPLE_EXPRESSION */) {
            return getConstantType(arg, context);
        }
        else if (arg.type === 14 /* JS_CALL_EXPRESSION */) {
            // in the case of nested helper call, e.g. `normalizeProps(guardReactiveProps(exp))`
            return getConstantTypeOfHelperCall(arg, context);
        }
    }
    return 0 /* NOT_CONSTANT */;
}
function getGeneratedPropsConstantType(node, context) {
    let returnType = 3 /* CAN_STRINGIFY */;
    const props = getNodeProps(node);
    if (props && props.type === 15 /* JS_OBJECT_EXPRESSION */) {
        const { properties } = props;
        for (let i = 0; i < properties.length; i++) {
            const { key, value } = properties[i];
            const keyType = getConstantType(key, context);
            if (keyType === 0 /* NOT_CONSTANT */) {
                return keyType;
            }
            if (keyType < returnType) {
                returnType = keyType;
            }
            let valueType;
            if (value.type === 4 /* SIMPLE_EXPRESSION */) {
                valueType = getConstantType(value, context);
            }
            else if (value.type === 14 /* JS_CALL_EXPRESSION */) {
                // some helper calls can be hoisted,
                // such as the `normalizeProps` generated by the compiler for pre-normalize class,
                // in this case we need to respect the ConstantType of the helper's arguments
                valueType = getConstantTypeOfHelperCall(value, context);
            }
            else {
                valueType = 0 /* NOT_CONSTANT */;
            }
            if (valueType === 0 /* NOT_CONSTANT */) {
                return valueType;
            }
            if (valueType < returnType) {
                returnType = valueType;
            }
        }
    }
    return returnType;
}
function getNodeProps(node) {
    const codegenNode = node.codegenNode;
    if (codegenNode.type === 13 /* VNODE_CALL */) {
        return codegenNode.props;
    }
}
function getPatchFlag(node) {
    const flag = node.patchFlag;
    return flag ? parseInt(flag, 10) : undefined;
}

function createTransformContext(root, { filename = '', prefixIdentifiers = false, hoistStatic = false, cacheHandlers = false, nodeTransforms = [], directiveTransforms = {}, transformHoist = null, isBuiltInComponent = NOOP, isCustomElement = NOOP, expressionPlugins = [], scopeId = null, slotted = true, ssr = false, inSSR = false, ssrCssVars = ``, bindingMetadata = EMPTY_OBJ, inline = false, isTS = false, onError = defaultOnError, onWarn = defaultOnWarn, compatConfig }) {
    const nameMatch = filename.replace(/\?.*$/, '').match(/([^/\\]+)\.\w+$/);
    const context = {
        // options
        selfName: nameMatch && capitalize(camelize(nameMatch[1])),
        prefixIdentifiers,
        hoistStatic,
        cacheHandlers,
        nodeTransforms,
        directiveTransforms,
        transformHoist,
        isBuiltInComponent,
        isCustomElement,
        expressionPlugins,
        scopeId,
        slotted,
        ssr,
        inSSR,
        ssrCssVars,
        bindingMetadata,
        inline,
        isTS,
        onError,
        onWarn,
        compatConfig,
        // state
        root,
        helpers: new Map(),
        components: new Set(),
        directives: new Set(),
        hoists: [],
        imports: [],
        constantCache: new Map(),
        temps: 0,
        cached: 0,
        identifiers: Object.create(null),
        scopes: {
            vFor: 0,
            vSlot: 0,
            vPre: 0,
            vOnce: 0
        },
        parent: null,
        currentNode: root,
        childIndex: 0,
        inVOnce: false,
        // methods
        helper(name) {
            const count = context.helpers.get(name) || 0;
            context.helpers.set(name, count + 1);
            return name;
        },
        removeHelper(name) {
            const count = context.helpers.get(name);
            if (count) {
                const currentCount = count - 1;
                if (!currentCount) {
                    context.helpers.delete(name);
                }
                else {
                    context.helpers.set(name, currentCount);
                }
            }
        },
        helperString(name) {
            return `_${helperNameMap[context.helper(name)]}`;
        },
        replaceNode(node) {
            /* istanbul ignore if */
            {
                if (!context.currentNode) {
                    throw new Error(`Node being replaced is already removed.`);
                }
                if (!context.parent) {
                    throw new Error(`Cannot replace root node.`);
                }
            }
            context.parent.children[context.childIndex] = context.currentNode = node;
        },
        removeNode(node) {
            if (!context.parent) {
                throw new Error(`Cannot remove root node.`);
            }
            const list = context.parent.children;
            const removalIndex = node
                ? list.indexOf(node)
                : context.currentNode
                    ? context.childIndex
                    : -1;
            /* istanbul ignore if */
            if (removalIndex < 0) {
                throw new Error(`node being removed is not a child of current parent`);
            }
            if (!node || node === context.currentNode) {
                // current node removed
                context.currentNode = null;
                context.onNodeRemoved();
            }
            else {
                // sibling node removed
                if (context.childIndex > removalIndex) {
                    context.childIndex--;
                    context.onNodeRemoved();
                }
            }
            context.parent.children.splice(removalIndex, 1);
        },
        onNodeRemoved: () => { },
        addIdentifiers(exp) {
            // identifier tracking only happens in non-browser builds.
            {
                if (isString(exp)) {
                    addId(exp);
                }
                else if (exp.identifiers) {
                    exp.identifiers.forEach(addId);
                }
                else if (exp.type === 4 /* SIMPLE_EXPRESSION */) {
                    addId(exp.content);
                }
            }
        },
        removeIdentifiers(exp) {
            {
                if (isString(exp)) {
                    removeId(exp);
                }
                else if (exp.identifiers) {
                    exp.identifiers.forEach(removeId);
                }
                else if (exp.type === 4 /* SIMPLE_EXPRESSION */) {
                    removeId(exp.content);
                }
            }
        },
        hoist(exp) {
            if (isString(exp))
                exp = createSimpleExpression(exp);
            context.hoists.push(exp);
            const identifier = createSimpleExpression(`_hoisted_${context.hoists.length}`, false, exp.loc, 2 /* CAN_HOIST */);
            identifier.hoisted = exp;
            return identifier;
        },
        cache(exp, isVNode = false) {
            return createCacheExpression(context.cached++, exp, isVNode);
        }
    };
    function addId(id) {
        const { identifiers } = context;
        if (identifiers[id] === undefined) {
            identifiers[id] = 0;
        }
        identifiers[id]++;
    }
    function removeId(id) {
        context.identifiers[id]--;
    }
    return context;
}
function transform(root, options) {
    const context = createTransformContext(root, options);
    traverseNode(root, context);
    if (options.hoistStatic) {
        hoistStatic(root, context);
    }
    if (!options.ssr) {
        createRootCodegen(root, context);
    }
    // finalize meta information
    root.helpers = [...context.helpers.keys()];
    root.components = [...context.components];
    root.directives = [...context.directives];
    root.imports = context.imports;
    root.hoists = context.hoists;
    root.temps = context.temps;
    root.cached = context.cached;
}
function createRootCodegen(root, context) {
    const { helper } = context;
    const { children } = root;
    if (children.length === 1) {
        const child = children[0];
        // if the single child is an element, turn it into a block.
        if (isSingleElementRoot(root, child) && child.codegenNode) {
            // single element root is never hoisted so codegenNode will never be
            // SimpleExpressionNode
            const codegenNode = child.codegenNode;
            if (codegenNode.type === 13 /* VNODE_CALL */) {
                makeBlock(codegenNode, context);
            }
            root.codegenNode = codegenNode;
        }
        else {
            // - single <slot/>, IfNode, ForNode: already blocks.
            // - single text node: always patched.
            // root codegen falls through via genNode()
            root.codegenNode = child;
        }
    }
    else if (children.length > 1) {
        // root has multiple nodes - return a fragment block.
        let patchFlag = 64 /* STABLE_FRAGMENT */;
        let patchFlagText = PatchFlagNames[64 /* STABLE_FRAGMENT */];
        // check if the fragment actually contains a single valid child with
        // the rest being comments
        if (children.filter(c => c.type !== 3 /* COMMENT */).length === 1) {
            patchFlag |= 2048 /* DEV_ROOT_FRAGMENT */;
            patchFlagText += `, ${PatchFlagNames[2048 /* DEV_ROOT_FRAGMENT */]}`;
        }
        root.codegenNode = createVNodeCall(context, helper(FRAGMENT), undefined, root.children, patchFlag + (` /* ${patchFlagText} */` ), undefined, undefined, true, undefined, false /* isComponent */);
    }
    else ;
}
function traverseChildren(parent, context) {
    let i = 0;
    const nodeRemoved = () => {
        i--;
    };
    for (; i < parent.children.length; i++) {
        const child = parent.children[i];
        if (isString(child))
            continue;
        context.parent = parent;
        context.childIndex = i;
        context.onNodeRemoved = nodeRemoved;
        traverseNode(child, context);
    }
}
function traverseNode(node, context) {
    context.currentNode = node;
    // apply transform plugins
    const { nodeTransforms } = context;
    const exitFns = [];
    for (let i = 0; i < nodeTransforms.length; i++) {
        const onExit = nodeTransforms[i](node, context);
        if (onExit) {
            if (isArray(onExit)) {
                exitFns.push(...onExit);
            }
            else {
                exitFns.push(onExit);
            }
        }
        if (!context.currentNode) {
            // node was removed
            return;
        }
        else {
            // node may have been replaced
            node = context.currentNode;
        }
    }
    switch (node.type) {
        case 3 /* COMMENT */:
            if (!context.ssr) {
                // inject import for the Comment symbol, which is needed for creating
                // comment nodes with `createVNode`
                context.helper(CREATE_COMMENT);
            }
            break;
        case 5 /* INTERPOLATION */:
            // no need to traverse, but we need to inject toString helper
            if (!context.ssr) {
                context.helper(TO_DISPLAY_STRING);
            }
            break;
        // for container types, further traverse downwards
        case 9 /* IF */:
            for (let i = 0; i < node.branches.length; i++) {
                traverseNode(node.branches[i], context);
            }
            break;
        case 10 /* IF_BRANCH */:
        case 11 /* FOR */:
        case 1 /* ELEMENT */:
        case 0 /* ROOT */:
            traverseChildren(node, context);
            break;
    }
    // exit transforms
    context.currentNode = node;
    let i = exitFns.length;
    while (i--) {
        exitFns[i]();
    }
}
function createStructuralDirectiveTransform(name, fn) {
    const matches = isString(name)
        ? (n) => n === name
        : (n) => name.test(n);
    return (node, context) => {
        if (node.type === 1 /* ELEMENT */) {
            const { props } = node;
            // structural directive transforms are not concerned with slots
            // as they are handled separately in vSlot.ts
            if (node.tagType === 3 /* TEMPLATE */ && props.some(isVSlot)) {
                return;
            }
            const exitFns = [];
            for (let i = 0; i < props.length; i++) {
                const prop = props[i];
                if (prop.type === 7 /* DIRECTIVE */ && matches(prop.name)) {
                    // structural directives are removed to avoid infinite recursion
                    // also we remove them *before* applying so that it can further
                    // traverse itself in case it moves the node around
                    props.splice(i, 1);
                    i--;
                    const onExit = fn(node, prop, context);
                    if (onExit)
                        exitFns.push(onExit);
                }
            }
            return exitFns;
        }
    };
}

/* -*- Mode: js; js-indent-level: 2; -*- */
/*
 * Copyright 2011 Mozilla Foundation and contributors
 * Licensed under the New BSD license. See LICENSE or:
 * http://opensource.org/licenses/BSD-3-Clause
 */

var intToCharMap = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'.split('');

/**
 * Encode an integer in the range of 0 to 63 to a single base 64 digit.
 */
var encode = function (number) {
  if (0 <= number && number < intToCharMap.length) {
    return intToCharMap[number];
  }
  throw new TypeError("Must be between 0 and 63: " + number);
};

/**
 * Decode a single base 64 character code digit to an integer. Returns -1 on
 * failure.
 */
var decode = function (charCode) {
  var bigA = 65;     // 'A'
  var bigZ = 90;     // 'Z'

  var littleA = 97;  // 'a'
  var littleZ = 122; // 'z'

  var zero = 48;     // '0'
  var nine = 57;     // '9'

  var plus = 43;     // '+'
  var slash = 47;    // '/'

  var littleOffset = 26;
  var numberOffset = 52;

  // 0 - 25: ABCDEFGHIJKLMNOPQRSTUVWXYZ
  if (bigA <= charCode && charCode <= bigZ) {
    return (charCode - bigA);
  }

  // 26 - 51: abcdefghijklmnopqrstuvwxyz
  if (littleA <= charCode && charCode <= littleZ) {
    return (charCode - littleA + littleOffset);
  }

  // 52 - 61: 0123456789
  if (zero <= charCode && charCode <= nine) {
    return (charCode - zero + numberOffset);
  }

  // 62: +
  if (charCode == plus) {
    return 62;
  }

  // 63: /
  if (charCode == slash) {
    return 63;
  }

  // Invalid base64 digit.
  return -1;
};

var base64 = {
	encode: encode,
	decode: decode
};

/* -*- Mode: js; js-indent-level: 2; -*- */

/*
 * Copyright 2011 Mozilla Foundation and contributors
 * Licensed under the New BSD license. See LICENSE or:
 * http://opensource.org/licenses/BSD-3-Clause
 *
 * Based on the Base 64 VLQ implementation in Closure Compiler:
 * https://code.google.com/p/closure-compiler/source/browse/trunk/src/com/google/debugging/sourcemap/Base64VLQ.java
 *
 * Copyright 2011 The Closure Compiler Authors. All rights reserved.
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *  * Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above
 *    copyright notice, this list of conditions and the following
 *    disclaimer in the documentation and/or other materials provided
 *    with the distribution.
 *  * Neither the name of Google Inc. nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */



// A single base 64 digit can contain 6 bits of data. For the base 64 variable
// length quantities we use in the source map spec, the first bit is the sign,
// the next four bits are the actual value, and the 6th bit is the
// continuation bit. The continuation bit tells us whether there are more
// digits in this value following this digit.
//
//   Continuation
//   |    Sign
//   |    |
//   V    V
//   101011

var VLQ_BASE_SHIFT = 5;

// binary: 100000
var VLQ_BASE = 1 << VLQ_BASE_SHIFT;

// binary: 011111
var VLQ_BASE_MASK = VLQ_BASE - 1;

// binary: 100000
var VLQ_CONTINUATION_BIT = VLQ_BASE;

/**
 * Converts from a two-complement value to a value where the sign bit is
 * placed in the least significant bit.  For example, as decimals:
 *   1 becomes 2 (10 binary), -1 becomes 3 (11 binary)
 *   2 becomes 4 (100 binary), -2 becomes 5 (101 binary)
 */
function toVLQSigned(aValue) {
  return aValue < 0
    ? ((-aValue) << 1) + 1
    : (aValue << 1) + 0;
}

/**
 * Converts to a two-complement value from a value where the sign bit is
 * placed in the least significant bit.  For example, as decimals:
 *   2 (10 binary) becomes 1, 3 (11 binary) becomes -1
 *   4 (100 binary) becomes 2, 5 (101 binary) becomes -2
 */
function fromVLQSigned(aValue) {
  var isNegative = (aValue & 1) === 1;
  var shifted = aValue >> 1;
  return isNegative
    ? -shifted
    : shifted;
}

/**
 * Returns the base 64 VLQ encoded value.
 */
var encode$1 = function base64VLQ_encode(aValue) {
  var encoded = "";
  var digit;

  var vlq = toVLQSigned(aValue);

  do {
    digit = vlq & VLQ_BASE_MASK;
    vlq >>>= VLQ_BASE_SHIFT;
    if (vlq > 0) {
      // There are still more digits in this value, so we must make sure the
      // continuation bit is marked.
      digit |= VLQ_CONTINUATION_BIT;
    }
    encoded += base64.encode(digit);
  } while (vlq > 0);

  return encoded;
};

/**
 * Decodes the next base 64 VLQ value from the given string and returns the
 * value and the rest of the string via the out parameter.
 */
var decode$1 = function base64VLQ_decode(aStr, aIndex, aOutParam) {
  var strLen = aStr.length;
  var result = 0;
  var shift = 0;
  var continuation, digit;

  do {
    if (aIndex >= strLen) {
      throw new Error("Expected more digits in base 64 VLQ value.");
    }

    digit = base64.decode(aStr.charCodeAt(aIndex++));
    if (digit === -1) {
      throw new Error("Invalid base64 digit: " + aStr.charAt(aIndex - 1));
    }

    continuation = !!(digit & VLQ_CONTINUATION_BIT);
    digit &= VLQ_BASE_MASK;
    result = result + (digit << shift);
    shift += VLQ_BASE_SHIFT;
  } while (continuation);

  aOutParam.value = fromVLQSigned(result);
  aOutParam.rest = aIndex;
};

var base64Vlq = {
	encode: encode$1,
	decode: decode$1
};

function getDefaultExportFromCjs (x) {
	return x && x.__esModule && Object.prototype.hasOwnProperty.call(x, 'default') ? x['default'] : x;
}

function getAugmentedNamespace(n) {
	if (n.__esModule) return n;
	var a = Object.defineProperty({}, '__esModule', {value: true});
	Object.keys(n).forEach(function (k) {
		var d = Object.getOwnPropertyDescriptor(n, k);
		Object.defineProperty(a, k, d.get ? d : {
			enumerable: true,
			get: function () {
				return n[k];
			}
		});
	});
	return a;
}

function createCommonjsModule(fn) {
  var module = { exports: {} };
	return fn(module, module.exports), module.exports;
}

/* -*- Mode: js; js-indent-level: 2; -*- */

var util = createCommonjsModule(function (module, exports) {
/*
 * Copyright 2011 Mozilla Foundation and contributors
 * Licensed under the New BSD license. See LICENSE or:
 * http://opensource.org/licenses/BSD-3-Clause
 */

/**
 * This is a helper function for getting values from parameter/options
 * objects.
 *
 * @param args The object we are extracting values from
 * @param name The name of the property we are getting.
 * @param defaultValue An optional value to return if the property is missing
 * from the object. If this is not specified and the property is missing, an
 * error will be thrown.
 */
function getArg(aArgs, aName, aDefaultValue) {
  if (aName in aArgs) {
    return aArgs[aName];
  } else if (arguments.length === 3) {
    return aDefaultValue;
  } else {
    throw new Error('"' + aName + '" is a required argument.');
  }
}
exports.getArg = getArg;

var urlRegexp = /^(?:([\w+\-.]+):)?\/\/(?:(\w+:\w+)@)?([\w.-]*)(?::(\d+))?(.*)$/;
var dataUrlRegexp = /^data:.+\,.+$/;

function urlParse(aUrl) {
  var match = aUrl.match(urlRegexp);
  if (!match) {
    return null;
  }
  return {
    scheme: match[1],
    auth: match[2],
    host: match[3],
    port: match[4],
    path: match[5]
  };
}
exports.urlParse = urlParse;

function urlGenerate(aParsedUrl) {
  var url = '';
  if (aParsedUrl.scheme) {
    url += aParsedUrl.scheme + ':';
  }
  url += '//';
  if (aParsedUrl.auth) {
    url += aParsedUrl.auth + '@';
  }
  if (aParsedUrl.host) {
    url += aParsedUrl.host;
  }
  if (aParsedUrl.port) {
    url += ":" + aParsedUrl.port;
  }
  if (aParsedUrl.path) {
    url += aParsedUrl.path;
  }
  return url;
}
exports.urlGenerate = urlGenerate;

/**
 * Normalizes a path, or the path portion of a URL:
 *
 * - Replaces consecutive slashes with one slash.
 * - Removes unnecessary '.' parts.
 * - Removes unnecessary '<dir>/..' parts.
 *
 * Based on code in the Node.js 'path' core module.
 *
 * @param aPath The path or url to normalize.
 */
function normalize(aPath) {
  var path = aPath;
  var url = urlParse(aPath);
  if (url) {
    if (!url.path) {
      return aPath;
    }
    path = url.path;
  }
  var isAbsolute = exports.isAbsolute(path);

  var parts = path.split(/\/+/);
  for (var part, up = 0, i = parts.length - 1; i >= 0; i--) {
    part = parts[i];
    if (part === '.') {
      parts.splice(i, 1);
    } else if (part === '..') {
      up++;
    } else if (up > 0) {
      if (part === '') {
        // The first part is blank if the path is absolute. Trying to go
        // above the root is a no-op. Therefore we can remove all '..' parts
        // directly after the root.
        parts.splice(i + 1, up);
        up = 0;
      } else {
        parts.splice(i, 2);
        up--;
      }
    }
  }
  path = parts.join('/');

  if (path === '') {
    path = isAbsolute ? '/' : '.';
  }

  if (url) {
    url.path = path;
    return urlGenerate(url);
  }
  return path;
}
exports.normalize = normalize;

/**
 * Joins two paths/URLs.
 *
 * @param aRoot The root path or URL.
 * @param aPath The path or URL to be joined with the root.
 *
 * - If aPath is a URL or a data URI, aPath is returned, unless aPath is a
 *   scheme-relative URL: Then the scheme of aRoot, if any, is prepended
 *   first.
 * - Otherwise aPath is a path. If aRoot is a URL, then its path portion
 *   is updated with the result and aRoot is returned. Otherwise the result
 *   is returned.
 *   - If aPath is absolute, the result is aPath.
 *   - Otherwise the two paths are joined with a slash.
 * - Joining for example 'http://' and 'www.example.com' is also supported.
 */
function join(aRoot, aPath) {
  if (aRoot === "") {
    aRoot = ".";
  }
  if (aPath === "") {
    aPath = ".";
  }
  var aPathUrl = urlParse(aPath);
  var aRootUrl = urlParse(aRoot);
  if (aRootUrl) {
    aRoot = aRootUrl.path || '/';
  }

  // `join(foo, '//www.example.org')`
  if (aPathUrl && !aPathUrl.scheme) {
    if (aRootUrl) {
      aPathUrl.scheme = aRootUrl.scheme;
    }
    return urlGenerate(aPathUrl);
  }

  if (aPathUrl || aPath.match(dataUrlRegexp)) {
    return aPath;
  }

  // `join('http://', 'www.example.com')`
  if (aRootUrl && !aRootUrl.host && !aRootUrl.path) {
    aRootUrl.host = aPath;
    return urlGenerate(aRootUrl);
  }

  var joined = aPath.charAt(0) === '/'
    ? aPath
    : normalize(aRoot.replace(/\/+$/, '') + '/' + aPath);

  if (aRootUrl) {
    aRootUrl.path = joined;
    return urlGenerate(aRootUrl);
  }
  return joined;
}
exports.join = join;

exports.isAbsolute = function (aPath) {
  return aPath.charAt(0) === '/' || urlRegexp.test(aPath);
};

/**
 * Make a path relative to a URL or another path.
 *
 * @param aRoot The root path or URL.
 * @param aPath The path or URL to be made relative to aRoot.
 */
function relative(aRoot, aPath) {
  if (aRoot === "") {
    aRoot = ".";
  }

  aRoot = aRoot.replace(/\/$/, '');

  // It is possible for the path to be above the root. In this case, simply
  // checking whether the root is a prefix of the path won't work. Instead, we
  // need to remove components from the root one by one, until either we find
  // a prefix that fits, or we run out of components to remove.
  var level = 0;
  while (aPath.indexOf(aRoot + '/') !== 0) {
    var index = aRoot.lastIndexOf("/");
    if (index < 0) {
      return aPath;
    }

    // If the only part of the root that is left is the scheme (i.e. http://,
    // file:///, etc.), one or more slashes (/), or simply nothing at all, we
    // have exhausted all components, so the path is not relative to the root.
    aRoot = aRoot.slice(0, index);
    if (aRoot.match(/^([^\/]+:\/)?\/*$/)) {
      return aPath;
    }

    ++level;
  }

  // Make sure we add a "../" for each component we removed from the root.
  return Array(level + 1).join("../") + aPath.substr(aRoot.length + 1);
}
exports.relative = relative;

var supportsNullProto = (function () {
  var obj = Object.create(null);
  return !('__proto__' in obj);
}());

function identity (s) {
  return s;
}

/**
 * Because behavior goes wacky when you set `__proto__` on objects, we
 * have to prefix all the strings in our set with an arbitrary character.
 *
 * See https://github.com/mozilla/source-map/pull/31 and
 * https://github.com/mozilla/source-map/issues/30
 *
 * @param String aStr
 */
function toSetString(aStr) {
  if (isProtoString(aStr)) {
    return '$' + aStr;
  }

  return aStr;
}
exports.toSetString = supportsNullProto ? identity : toSetString;

function fromSetString(aStr) {
  if (isProtoString(aStr)) {
    return aStr.slice(1);
  }

  return aStr;
}
exports.fromSetString = supportsNullProto ? identity : fromSetString;

function isProtoString(s) {
  if (!s) {
    return false;
  }

  var length = s.length;

  if (length < 9 /* "__proto__".length */) {
    return false;
  }

  if (s.charCodeAt(length - 1) !== 95  /* '_' */ ||
      s.charCodeAt(length - 2) !== 95  /* '_' */ ||
      s.charCodeAt(length - 3) !== 111 /* 'o' */ ||
      s.charCodeAt(length - 4) !== 116 /* 't' */ ||
      s.charCodeAt(length - 5) !== 111 /* 'o' */ ||
      s.charCodeAt(length - 6) !== 114 /* 'r' */ ||
      s.charCodeAt(length - 7) !== 112 /* 'p' */ ||
      s.charCodeAt(length - 8) !== 95  /* '_' */ ||
      s.charCodeAt(length - 9) !== 95  /* '_' */) {
    return false;
  }

  for (var i = length - 10; i >= 0; i--) {
    if (s.charCodeAt(i) !== 36 /* '$' */) {
      return false;
    }
  }

  return true;
}

/**
 * Comparator between two mappings where the original positions are compared.
 *
 * Optionally pass in `true` as `onlyCompareGenerated` to consider two
 * mappings with the same original source/line/column, but different generated
 * line and column the same. Useful when searching for a mapping with a
 * stubbed out mapping.
 */
function compareByOriginalPositions(mappingA, mappingB, onlyCompareOriginal) {
  var cmp = strcmp(mappingA.source, mappingB.source);
  if (cmp !== 0) {
    return cmp;
  }

  cmp = mappingA.originalLine - mappingB.originalLine;
  if (cmp !== 0) {
    return cmp;
  }

  cmp = mappingA.originalColumn - mappingB.originalColumn;
  if (cmp !== 0 || onlyCompareOriginal) {
    return cmp;
  }

  cmp = mappingA.generatedColumn - mappingB.generatedColumn;
  if (cmp !== 0) {
    return cmp;
  }

  cmp = mappingA.generatedLine - mappingB.generatedLine;
  if (cmp !== 0) {
    return cmp;
  }

  return strcmp(mappingA.name, mappingB.name);
}
exports.compareByOriginalPositions = compareByOriginalPositions;

/**
 * Comparator between two mappings with deflated source and name indices where
 * the generated positions are compared.
 *
 * Optionally pass in `true` as `onlyCompareGenerated` to consider two
 * mappings with the same generated line and column, but different
 * source/name/original line and column the same. Useful when searching for a
 * mapping with a stubbed out mapping.
 */
function compareByGeneratedPositionsDeflated(mappingA, mappingB, onlyCompareGenerated) {
  var cmp = mappingA.generatedLine - mappingB.generatedLine;
  if (cmp !== 0) {
    return cmp;
  }

  cmp = mappingA.generatedColumn - mappingB.generatedColumn;
  if (cmp !== 0 || onlyCompareGenerated) {
    return cmp;
  }

  cmp = strcmp(mappingA.source, mappingB.source);
  if (cmp !== 0) {
    return cmp;
  }

  cmp = mappingA.originalLine - mappingB.originalLine;
  if (cmp !== 0) {
    return cmp;
  }

  cmp = mappingA.originalColumn - mappingB.originalColumn;
  if (cmp !== 0) {
    return cmp;
  }

  return strcmp(mappingA.name, mappingB.name);
}
exports.compareByGeneratedPositionsDeflated = compareByGeneratedPositionsDeflated;

function strcmp(aStr1, aStr2) {
  if (aStr1 === aStr2) {
    return 0;
  }

  if (aStr1 === null) {
    return 1; // aStr2 !== null
  }

  if (aStr2 === null) {
    return -1; // aStr1 !== null
  }

  if (aStr1 > aStr2) {
    return 1;
  }

  return -1;
}

/**
 * Comparator between two mappings with inflated source and name strings where
 * the generated positions are compared.
 */
function compareByGeneratedPositionsInflated(mappingA, mappingB) {
  var cmp = mappingA.generatedLine - mappingB.generatedLine;
  if (cmp !== 0) {
    return cmp;
  }

  cmp = mappingA.generatedColumn - mappingB.generatedColumn;
  if (cmp !== 0) {
    return cmp;
  }

  cmp = strcmp(mappingA.source, mappingB.source);
  if (cmp !== 0) {
    return cmp;
  }

  cmp = mappingA.originalLine - mappingB.originalLine;
  if (cmp !== 0) {
    return cmp;
  }

  cmp = mappingA.originalColumn - mappingB.originalColumn;
  if (cmp !== 0) {
    return cmp;
  }

  return strcmp(mappingA.name, mappingB.name);
}
exports.compareByGeneratedPositionsInflated = compareByGeneratedPositionsInflated;

/**
 * Strip any JSON XSSI avoidance prefix from the string (as documented
 * in the source maps specification), and then parse the string as
 * JSON.
 */
function parseSourceMapInput(str) {
  return JSON.parse(str.replace(/^\)]}'[^\n]*\n/, ''));
}
exports.parseSourceMapInput = parseSourceMapInput;

/**
 * Compute the URL of a source given the the source root, the source's
 * URL, and the source map's URL.
 */
function computeSourceURL(sourceRoot, sourceURL, sourceMapURL) {
  sourceURL = sourceURL || '';

  if (sourceRoot) {
    // This follows what Chrome does.
    if (sourceRoot[sourceRoot.length - 1] !== '/' && sourceURL[0] !== '/') {
      sourceRoot += '/';
    }
    // The spec says:
    //   Line 4: An optional source root, useful for relocating source
    //   files on a server or removing repeated values in the
    //   “sources” entry.  This value is prepended to the individual
    //   entries in the “source” field.
    sourceURL = sourceRoot + sourceURL;
  }

  // Historically, SourceMapConsumer did not take the sourceMapURL as
  // a parameter.  This mode is still somewhat supported, which is why
  // this code block is conditional.  However, it's preferable to pass
  // the source map URL to SourceMapConsumer, so that this function
  // can implement the source URL resolution algorithm as outlined in
  // the spec.  This block is basically the equivalent of:
  //    new URL(sourceURL, sourceMapURL).toString()
  // ... except it avoids using URL, which wasn't available in the
  // older releases of node still supported by this library.
  //
  // The spec says:
  //   If the sources are not absolute URLs after prepending of the
  //   “sourceRoot”, the sources are resolved relative to the
  //   SourceMap (like resolving script src in a html document).
  if (sourceMapURL) {
    var parsed = urlParse(sourceMapURL);
    if (!parsed) {
      throw new Error("sourceMapURL could not be parsed");
    }
    if (parsed.path) {
      // Strip the last path component, but keep the "/".
      var index = parsed.path.lastIndexOf('/');
      if (index >= 0) {
        parsed.path = parsed.path.substring(0, index + 1);
      }
    }
    sourceURL = join(urlGenerate(parsed), sourceURL);
  }

  return normalize(sourceURL);
}
exports.computeSourceURL = computeSourceURL;
});

/* -*- Mode: js; js-indent-level: 2; -*- */

/*
 * Copyright 2011 Mozilla Foundation and contributors
 * Licensed under the New BSD license. See LICENSE or:
 * http://opensource.org/licenses/BSD-3-Clause
 */


var has = Object.prototype.hasOwnProperty;
var hasNativeMap = typeof Map !== "undefined";

/**
 * A data structure which is a combination of an array and a set. Adding a new
 * member is O(1), testing for membership is O(1), and finding the index of an
 * element is O(1). Removing elements from the set is not supported. Only
 * strings are supported for membership.
 */
function ArraySet() {
  this._array = [];
  this._set = hasNativeMap ? new Map() : Object.create(null);
}

/**
 * Static method for creating ArraySet instances from an existing array.
 */
ArraySet.fromArray = function ArraySet_fromArray(aArray, aAllowDuplicates) {
  var set = new ArraySet();
  for (var i = 0, len = aArray.length; i < len; i++) {
    set.add(aArray[i], aAllowDuplicates);
  }
  return set;
};

/**
 * Return how many unique items are in this ArraySet. If duplicates have been
 * added, than those do not count towards the size.
 *
 * @returns Number
 */
ArraySet.prototype.size = function ArraySet_size() {
  return hasNativeMap ? this._set.size : Object.getOwnPropertyNames(this._set).length;
};

/**
 * Add the given string to this set.
 *
 * @param String aStr
 */
ArraySet.prototype.add = function ArraySet_add(aStr, aAllowDuplicates) {
  var sStr = hasNativeMap ? aStr : util.toSetString(aStr);
  var isDuplicate = hasNativeMap ? this.has(aStr) : has.call(this._set, sStr);
  var idx = this._array.length;
  if (!isDuplicate || aAllowDuplicates) {
    this._array.push(aStr);
  }
  if (!isDuplicate) {
    if (hasNativeMap) {
      this._set.set(aStr, idx);
    } else {
      this._set[sStr] = idx;
    }
  }
};

/**
 * Is the given string a member of this set?
 *
 * @param String aStr
 */
ArraySet.prototype.has = function ArraySet_has(aStr) {
  if (hasNativeMap) {
    return this._set.has(aStr);
  } else {
    var sStr = util.toSetString(aStr);
    return has.call(this._set, sStr);
  }
};

/**
 * What is the index of the given string in the array?
 *
 * @param String aStr
 */
ArraySet.prototype.indexOf = function ArraySet_indexOf(aStr) {
  if (hasNativeMap) {
    var idx = this._set.get(aStr);
    if (idx >= 0) {
        return idx;
    }
  } else {
    var sStr = util.toSetString(aStr);
    if (has.call(this._set, sStr)) {
      return this._set[sStr];
    }
  }

  throw new Error('"' + aStr + '" is not in the set.');
};

/**
 * What is the element at the given index?
 *
 * @param Number aIdx
 */
ArraySet.prototype.at = function ArraySet_at(aIdx) {
  if (aIdx >= 0 && aIdx < this._array.length) {
    return this._array[aIdx];
  }
  throw new Error('No element indexed by ' + aIdx);
};

/**
 * Returns the array representation of this set (which has the proper indices
 * indicated by indexOf). Note that this is a copy of the internal array used
 * for storing the members so that no one can mess with internal state.
 */
ArraySet.prototype.toArray = function ArraySet_toArray() {
  return this._array.slice();
};

var ArraySet_1 = ArraySet;

var arraySet = {
	ArraySet: ArraySet_1
};

/* -*- Mode: js; js-indent-level: 2; -*- */

/*
 * Copyright 2014 Mozilla Foundation and contributors
 * Licensed under the New BSD license. See LICENSE or:
 * http://opensource.org/licenses/BSD-3-Clause
 */



/**
 * Determine whether mappingB is after mappingA with respect to generated
 * position.
 */
function generatedPositionAfter(mappingA, mappingB) {
  // Optimized for most common case
  var lineA = mappingA.generatedLine;
  var lineB = mappingB.generatedLine;
  var columnA = mappingA.generatedColumn;
  var columnB = mappingB.generatedColumn;
  return lineB > lineA || lineB == lineA && columnB >= columnA ||
         util.compareByGeneratedPositionsInflated(mappingA, mappingB) <= 0;
}

/**
 * A data structure to provide a sorted view of accumulated mappings in a
 * performance conscious manner. It trades a neglibable overhead in general
 * case for a large speedup in case of mappings being added in order.
 */
function MappingList() {
  this._array = [];
  this._sorted = true;
  // Serves as infimum
  this._last = {generatedLine: -1, generatedColumn: 0};
}

/**
 * Iterate through internal items. This method takes the same arguments that
 * `Array.prototype.forEach` takes.
 *
 * NOTE: The order of the mappings is NOT guaranteed.
 */
MappingList.prototype.unsortedForEach =
  function MappingList_forEach(aCallback, aThisArg) {
    this._array.forEach(aCallback, aThisArg);
  };

/**
 * Add the given source mapping.
 *
 * @param Object aMapping
 */
MappingList.prototype.add = function MappingList_add(aMapping) {
  if (generatedPositionAfter(this._last, aMapping)) {
    this._last = aMapping;
    this._array.push(aMapping);
  } else {
    this._sorted = false;
    this._array.push(aMapping);
  }
};

/**
 * Returns the flat, sorted array of mappings. The mappings are sorted by
 * generated position.
 *
 * WARNING: This method returns internal data without copying, for
 * performance. The return value must NOT be mutated, and should be treated as
 * an immutable borrow. If you want to take ownership, you must make your own
 * copy.
 */
MappingList.prototype.toArray = function MappingList_toArray() {
  if (!this._sorted) {
    this._array.sort(util.compareByGeneratedPositionsInflated);
    this._sorted = true;
  }
  return this._array;
};

var MappingList_1 = MappingList;

var mappingList = {
	MappingList: MappingList_1
};

/* -*- Mode: js; js-indent-level: 2; -*- */

/*
 * Copyright 2011 Mozilla Foundation and contributors
 * Licensed under the New BSD license. See LICENSE or:
 * http://opensource.org/licenses/BSD-3-Clause
 */



var ArraySet$1 = arraySet.ArraySet;
var MappingList$1 = mappingList.MappingList;

/**
 * An instance of the SourceMapGenerator represents a source map which is
 * being built incrementally. You may pass an object with the following
 * properties:
 *
 *   - file: The filename of the generated source.
 *   - sourceRoot: A root for all relative URLs in this source map.
 */
function SourceMapGenerator(aArgs) {
  if (!aArgs) {
    aArgs = {};
  }
  this._file = util.getArg(aArgs, 'file', null);
  this._sourceRoot = util.getArg(aArgs, 'sourceRoot', null);
  this._skipValidation = util.getArg(aArgs, 'skipValidation', false);
  this._sources = new ArraySet$1();
  this._names = new ArraySet$1();
  this._mappings = new MappingList$1();
  this._sourcesContents = null;
}

SourceMapGenerator.prototype._version = 3;

/**
 * Creates a new SourceMapGenerator based on a SourceMapConsumer
 *
 * @param aSourceMapConsumer The SourceMap.
 */
SourceMapGenerator.fromSourceMap =
  function SourceMapGenerator_fromSourceMap(aSourceMapConsumer) {
    var sourceRoot = aSourceMapConsumer.sourceRoot;
    var generator = new SourceMapGenerator({
      file: aSourceMapConsumer.file,
      sourceRoot: sourceRoot
    });
    aSourceMapConsumer.eachMapping(function (mapping) {
      var newMapping = {
        generated: {
          line: mapping.generatedLine,
          column: mapping.generatedColumn
        }
      };

      if (mapping.source != null) {
        newMapping.source = mapping.source;
        if (sourceRoot != null) {
          newMapping.source = util.relative(sourceRoot, newMapping.source);
        }

        newMapping.original = {
          line: mapping.originalLine,
          column: mapping.originalColumn
        };

        if (mapping.name != null) {
          newMapping.name = mapping.name;
        }
      }

      generator.addMapping(newMapping);
    });
    aSourceMapConsumer.sources.forEach(function (sourceFile) {
      var sourceRelative = sourceFile;
      if (sourceRoot !== null) {
        sourceRelative = util.relative(sourceRoot, sourceFile);
      }

      if (!generator._sources.has(sourceRelative)) {
        generator._sources.add(sourceRelative);
      }

      var content = aSourceMapConsumer.sourceContentFor(sourceFile);
      if (content != null) {
        generator.setSourceContent(sourceFile, content);
      }
    });
    return generator;
  };

/**
 * Add a single mapping from original source line and column to the generated
 * source's line and column for this source map being created. The mapping
 * object should have the following properties:
 *
 *   - generated: An object with the generated line and column positions.
 *   - original: An object with the original line and column positions.
 *   - source: The original source file (relative to the sourceRoot).
 *   - name: An optional original token name for this mapping.
 */
SourceMapGenerator.prototype.addMapping =
  function SourceMapGenerator_addMapping(aArgs) {
    var generated = util.getArg(aArgs, 'generated');
    var original = util.getArg(aArgs, 'original', null);
    var source = util.getArg(aArgs, 'source', null);
    var name = util.getArg(aArgs, 'name', null);

    if (!this._skipValidation) {
      this._validateMapping(generated, original, source, name);
    }

    if (source != null) {
      source = String(source);
      if (!this._sources.has(source)) {
        this._sources.add(source);
      }
    }

    if (name != null) {
      name = String(name);
      if (!this._names.has(name)) {
        this._names.add(name);
      }
    }

    this._mappings.add({
      generatedLine: generated.line,
      generatedColumn: generated.column,
      originalLine: original != null && original.line,
      originalColumn: original != null && original.column,
      source: source,
      name: name
    });
  };

/**
 * Set the source content for a source file.
 */
SourceMapGenerator.prototype.setSourceContent =
  function SourceMapGenerator_setSourceContent(aSourceFile, aSourceContent) {
    var source = aSourceFile;
    if (this._sourceRoot != null) {
      source = util.relative(this._sourceRoot, source);
    }

    if (aSourceContent != null) {
      // Add the source content to the _sourcesContents map.
      // Create a new _sourcesContents map if the property is null.
      if (!this._sourcesContents) {
        this._sourcesContents = Object.create(null);
      }
      this._sourcesContents[util.toSetString(source)] = aSourceContent;
    } else if (this._sourcesContents) {
      // Remove the source file from the _sourcesContents map.
      // If the _sourcesContents map is empty, set the property to null.
      delete this._sourcesContents[util.toSetString(source)];
      if (Object.keys(this._sourcesContents).length === 0) {
        this._sourcesContents = null;
      }
    }
  };

/**
 * Applies the mappings of a sub-source-map for a specific source file to the
 * source map being generated. Each mapping to the supplied source file is
 * rewritten using the supplied source map. Note: The resolution for the
 * resulting mappings is the minimium of this map and the supplied map.
 *
 * @param aSourceMapConsumer The source map to be applied.
 * @param aSourceFile Optional. The filename of the source file.
 *        If omitted, SourceMapConsumer's file property will be used.
 * @param aSourceMapPath Optional. The dirname of the path to the source map
 *        to be applied. If relative, it is relative to the SourceMapConsumer.
 *        This parameter is needed when the two source maps aren't in the same
 *        directory, and the source map to be applied contains relative source
 *        paths. If so, those relative source paths need to be rewritten
 *        relative to the SourceMapGenerator.
 */
SourceMapGenerator.prototype.applySourceMap =
  function SourceMapGenerator_applySourceMap(aSourceMapConsumer, aSourceFile, aSourceMapPath) {
    var sourceFile = aSourceFile;
    // If aSourceFile is omitted, we will use the file property of the SourceMap
    if (aSourceFile == null) {
      if (aSourceMapConsumer.file == null) {
        throw new Error(
          'SourceMapGenerator.prototype.applySourceMap requires either an explicit source file, ' +
          'or the source map\'s "file" property. Both were omitted.'
        );
      }
      sourceFile = aSourceMapConsumer.file;
    }
    var sourceRoot = this._sourceRoot;
    // Make "sourceFile" relative if an absolute Url is passed.
    if (sourceRoot != null) {
      sourceFile = util.relative(sourceRoot, sourceFile);
    }
    // Applying the SourceMap can add and remove items from the sources and
    // the names array.
    var newSources = new ArraySet$1();
    var newNames = new ArraySet$1();

    // Find mappings for the "sourceFile"
    this._mappings.unsortedForEach(function (mapping) {
      if (mapping.source === sourceFile && mapping.originalLine != null) {
        // Check if it can be mapped by the source map, then update the mapping.
        var original = aSourceMapConsumer.originalPositionFor({
          line: mapping.originalLine,
          column: mapping.originalColumn
        });
        if (original.source != null) {
          // Copy mapping
          mapping.source = original.source;
          if (aSourceMapPath != null) {
            mapping.source = util.join(aSourceMapPath, mapping.source);
          }
          if (sourceRoot != null) {
            mapping.source = util.relative(sourceRoot, mapping.source);
          }
          mapping.originalLine = original.line;
          mapping.originalColumn = original.column;
          if (original.name != null) {
            mapping.name = original.name;
          }
        }
      }

      var source = mapping.source;
      if (source != null && !newSources.has(source)) {
        newSources.add(source);
      }

      var name = mapping.name;
      if (name != null && !newNames.has(name)) {
        newNames.add(name);
      }

    }, this);
    this._sources = newSources;
    this._names = newNames;

    // Copy sourcesContents of applied map.
    aSourceMapConsumer.sources.forEach(function (sourceFile) {
      var content = aSourceMapConsumer.sourceContentFor(sourceFile);
      if (content != null) {
        if (aSourceMapPath != null) {
          sourceFile = util.join(aSourceMapPath, sourceFile);
        }
        if (sourceRoot != null) {
          sourceFile = util.relative(sourceRoot, sourceFile);
        }
        this.setSourceContent(sourceFile, content);
      }
    }, this);
  };

/**
 * A mapping can have one of the three levels of data:
 *
 *   1. Just the generated position.
 *   2. The Generated position, original position, and original source.
 *   3. Generated and original position, original source, as well as a name
 *      token.
 *
 * To maintain consistency, we validate that any new mapping being added falls
 * in to one of these categories.
 */
SourceMapGenerator.prototype._validateMapping =
  function SourceMapGenerator_validateMapping(aGenerated, aOriginal, aSource,
                                              aName) {
    // When aOriginal is truthy but has empty values for .line and .column,
    // it is most likely a programmer error. In this case we throw a very
    // specific error message to try to guide them the right way.
    // For example: https://github.com/Polymer/polymer-bundler/pull/519
    if (aOriginal && typeof aOriginal.line !== 'number' && typeof aOriginal.column !== 'number') {
        throw new Error(
            'original.line and original.column are not numbers -- you probably meant to omit ' +
            'the original mapping entirely and only map the generated position. If so, pass ' +
            'null for the original mapping instead of an object with empty or null values.'
        );
    }

    if (aGenerated && 'line' in aGenerated && 'column' in aGenerated
        && aGenerated.line > 0 && aGenerated.column >= 0
        && !aOriginal && !aSource && !aName) {
      // Case 1.
      return;
    }
    else if (aGenerated && 'line' in aGenerated && 'column' in aGenerated
             && aOriginal && 'line' in aOriginal && 'column' in aOriginal
             && aGenerated.line > 0 && aGenerated.column >= 0
             && aOriginal.line > 0 && aOriginal.column >= 0
             && aSource) {
      // Cases 2 and 3.
      return;
    }
    else {
      throw new Error('Invalid mapping: ' + JSON.stringify({
        generated: aGenerated,
        source: aSource,
        original: aOriginal,
        name: aName
      }));
    }
  };

/**
 * Serialize the accumulated mappings in to the stream of base 64 VLQs
 * specified by the source map format.
 */
SourceMapGenerator.prototype._serializeMappings =
  function SourceMapGenerator_serializeMappings() {
    var previousGeneratedColumn = 0;
    var previousGeneratedLine = 1;
    var previousOriginalColumn = 0;
    var previousOriginalLine = 0;
    var previousName = 0;
    var previousSource = 0;
    var result = '';
    var next;
    var mapping;
    var nameIdx;
    var sourceIdx;

    var mappings = this._mappings.toArray();
    for (var i = 0, len = mappings.length; i < len; i++) {
      mapping = mappings[i];
      next = '';

      if (mapping.generatedLine !== previousGeneratedLine) {
        previousGeneratedColumn = 0;
        while (mapping.generatedLine !== previousGeneratedLine) {
          next += ';';
          previousGeneratedLine++;
        }
      }
      else {
        if (i > 0) {
          if (!util.compareByGeneratedPositionsInflated(mapping, mappings[i - 1])) {
            continue;
          }
          next += ',';
        }
      }

      next += base64Vlq.encode(mapping.generatedColumn
                                 - previousGeneratedColumn);
      previousGeneratedColumn = mapping.generatedColumn;

      if (mapping.source != null) {
        sourceIdx = this._sources.indexOf(mapping.source);
        next += base64Vlq.encode(sourceIdx - previousSource);
        previousSource = sourceIdx;

        // lines are stored 0-based in SourceMap spec version 3
        next += base64Vlq.encode(mapping.originalLine - 1
                                   - previousOriginalLine);
        previousOriginalLine = mapping.originalLine - 1;

        next += base64Vlq.encode(mapping.originalColumn
                                   - previousOriginalColumn);
        previousOriginalColumn = mapping.originalColumn;

        if (mapping.name != null) {
          nameIdx = this._names.indexOf(mapping.name);
          next += base64Vlq.encode(nameIdx - previousName);
          previousName = nameIdx;
        }
      }

      result += next;
    }

    return result;
  };

SourceMapGenerator.prototype._generateSourcesContent =
  function SourceMapGenerator_generateSourcesContent(aSources, aSourceRoot) {
    return aSources.map(function (source) {
      if (!this._sourcesContents) {
        return null;
      }
      if (aSourceRoot != null) {
        source = util.relative(aSourceRoot, source);
      }
      var key = util.toSetString(source);
      return Object.prototype.hasOwnProperty.call(this._sourcesContents, key)
        ? this._sourcesContents[key]
        : null;
    }, this);
  };

/**
 * Externalize the source map.
 */
SourceMapGenerator.prototype.toJSON =
  function SourceMapGenerator_toJSON() {
    var map = {
      version: this._version,
      sources: this._sources.toArray(),
      names: this._names.toArray(),
      mappings: this._serializeMappings()
    };
    if (this._file != null) {
      map.file = this._file;
    }
    if (this._sourceRoot != null) {
      map.sourceRoot = this._sourceRoot;
    }
    if (this._sourcesContents) {
      map.sourcesContent = this._generateSourcesContent(map.sources, map.sourceRoot);
    }

    return map;
  };

/**
 * Render the source map being generated to a string.
 */
SourceMapGenerator.prototype.toString =
  function SourceMapGenerator_toString() {
    return JSON.stringify(this.toJSON());
  };

var SourceMapGenerator_1 = SourceMapGenerator;

var sourceMapGenerator = {
	SourceMapGenerator: SourceMapGenerator_1
};

/* -*- Mode: js; js-indent-level: 2; -*- */

var binarySearch = createCommonjsModule(function (module, exports) {
/*
 * Copyright 2011 Mozilla Foundation and contributors
 * Licensed under the New BSD license. See LICENSE or:
 * http://opensource.org/licenses/BSD-3-Clause
 */

exports.GREATEST_LOWER_BOUND = 1;
exports.LEAST_UPPER_BOUND = 2;

/**
 * Recursive implementation of binary search.
 *
 * @param aLow Indices here and lower do not contain the needle.
 * @param aHigh Indices here and higher do not contain the needle.
 * @param aNeedle The element being searched for.
 * @param aHaystack The non-empty array being searched.
 * @param aCompare Function which takes two elements and returns -1, 0, or 1.
 * @param aBias Either 'binarySearch.GREATEST_LOWER_BOUND' or
 *     'binarySearch.LEAST_UPPER_BOUND'. Specifies whether to return the
 *     closest element that is smaller than or greater than the one we are
 *     searching for, respectively, if the exact element cannot be found.
 */
function recursiveSearch(aLow, aHigh, aNeedle, aHaystack, aCompare, aBias) {
  // This function terminates when one of the following is true:
  //
  //   1. We find the exact element we are looking for.
  //
  //   2. We did not find the exact element, but we can return the index of
  //      the next-closest element.
  //
  //   3. We did not find the exact element, and there is no next-closest
  //      element than the one we are searching for, so we return -1.
  var mid = Math.floor((aHigh - aLow) / 2) + aLow;
  var cmp = aCompare(aNeedle, aHaystack[mid], true);
  if (cmp === 0) {
    // Found the element we are looking for.
    return mid;
  }
  else if (cmp > 0) {
    // Our needle is greater than aHaystack[mid].
    if (aHigh - mid > 1) {
      // The element is in the upper half.
      return recursiveSearch(mid, aHigh, aNeedle, aHaystack, aCompare, aBias);
    }

    // The exact needle element was not found in this haystack. Determine if
    // we are in termination case (3) or (2) and return the appropriate thing.
    if (aBias == exports.LEAST_UPPER_BOUND) {
      return aHigh < aHaystack.length ? aHigh : -1;
    } else {
      return mid;
    }
  }
  else {
    // Our needle is less than aHaystack[mid].
    if (mid - aLow > 1) {
      // The element is in the lower half.
      return recursiveSearch(aLow, mid, aNeedle, aHaystack, aCompare, aBias);
    }

    // we are in termination case (3) or (2) and return the appropriate thing.
    if (aBias == exports.LEAST_UPPER_BOUND) {
      return mid;
    } else {
      return aLow < 0 ? -1 : aLow;
    }
  }
}

/**
 * This is an implementation of binary search which will always try and return
 * the index of the closest element if there is no exact hit. This is because
 * mappings between original and generated line/col pairs are single points,
 * and there is an implicit region between each of them, so a miss just means
 * that you aren't on the very start of a region.
 *
 * @param aNeedle The element you are looking for.
 * @param aHaystack The array that is being searched.
 * @param aCompare A function which takes the needle and an element in the
 *     array and returns -1, 0, or 1 depending on whether the needle is less
 *     than, equal to, or greater than the element, respectively.
 * @param aBias Either 'binarySearch.GREATEST_LOWER_BOUND' or
 *     'binarySearch.LEAST_UPPER_BOUND'. Specifies whether to return the
 *     closest element that is smaller than or greater than the one we are
 *     searching for, respectively, if the exact element cannot be found.
 *     Defaults to 'binarySearch.GREATEST_LOWER_BOUND'.
 */
exports.search = function search(aNeedle, aHaystack, aCompare, aBias) {
  if (aHaystack.length === 0) {
    return -1;
  }

  var index = recursiveSearch(-1, aHaystack.length, aNeedle, aHaystack,
                              aCompare, aBias || exports.GREATEST_LOWER_BOUND);
  if (index < 0) {
    return -1;
  }

  // We have found either the exact element, or the next-closest element than
  // the one we are searching for. However, there may be more than one such
  // element. Make sure we always return the smallest of these.
  while (index - 1 >= 0) {
    if (aCompare(aHaystack[index], aHaystack[index - 1], true) !== 0) {
      break;
    }
    --index;
  }

  return index;
};
});

/* -*- Mode: js; js-indent-level: 2; -*- */
/*
 * Copyright 2011 Mozilla Foundation and contributors
 * Licensed under the New BSD license. See LICENSE or:
 * http://opensource.org/licenses/BSD-3-Clause
 */

// It turns out that some (most?) JavaScript engines don't self-host
// `Array.prototype.sort`. This makes sense because C++ will likely remain
// faster than JS when doing raw CPU-intensive sorting. However, when using a
// custom comparator function, calling back and forth between the VM's C++ and
// JIT'd JS is rather slow *and* loses JIT type information, resulting in
// worse generated code for the comparator function than would be optimal. In
// fact, when sorting with a comparator, these costs outweigh the benefits of
// sorting in C++. By using our own JS-implemented Quick Sort (below), we get
// a ~3500ms mean speed-up in `bench/bench.html`.

/**
 * Swap the elements indexed by `x` and `y` in the array `ary`.
 *
 * @param {Array} ary
 *        The array.
 * @param {Number} x
 *        The index of the first item.
 * @param {Number} y
 *        The index of the second item.
 */
function swap(ary, x, y) {
  var temp = ary[x];
  ary[x] = ary[y];
  ary[y] = temp;
}

/**
 * Returns a random integer within the range `low .. high` inclusive.
 *
 * @param {Number} low
 *        The lower bound on the range.
 * @param {Number} high
 *        The upper bound on the range.
 */
function randomIntInRange(low, high) {
  return Math.round(low + (Math.random() * (high - low)));
}

/**
 * The Quick Sort algorithm.
 *
 * @param {Array} ary
 *        An array to sort.
 * @param {function} comparator
 *        Function to use to compare two items.
 * @param {Number} p
 *        Start index of the array
 * @param {Number} r
 *        End index of the array
 */
function doQuickSort(ary, comparator, p, r) {
  // If our lower bound is less than our upper bound, we (1) partition the
  // array into two pieces and (2) recurse on each half. If it is not, this is
  // the empty array and our base case.

  if (p < r) {
    // (1) Partitioning.
    //
    // The partitioning chooses a pivot between `p` and `r` and moves all
    // elements that are less than or equal to the pivot to the before it, and
    // all the elements that are greater than it after it. The effect is that
    // once partition is done, the pivot is in the exact place it will be when
    // the array is put in sorted order, and it will not need to be moved
    // again. This runs in O(n) time.

    // Always choose a random pivot so that an input array which is reverse
    // sorted does not cause O(n^2) running time.
    var pivotIndex = randomIntInRange(p, r);
    var i = p - 1;

    swap(ary, pivotIndex, r);
    var pivot = ary[r];

    // Immediately after `j` is incremented in this loop, the following hold
    // true:
    //
    //   * Every element in `ary[p .. i]` is less than or equal to the pivot.
    //
    //   * Every element in `ary[i+1 .. j-1]` is greater than the pivot.
    for (var j = p; j < r; j++) {
      if (comparator(ary[j], pivot) <= 0) {
        i += 1;
        swap(ary, i, j);
      }
    }

    swap(ary, i + 1, j);
    var q = i + 1;

    // (2) Recurse on each half.

    doQuickSort(ary, comparator, p, q - 1);
    doQuickSort(ary, comparator, q + 1, r);
  }
}

/**
 * Sort the given array in-place with the given comparator function.
 *
 * @param {Array} ary
 *        An array to sort.
 * @param {function} comparator
 *        Function to use to compare two items.
 */
var quickSort_1 = function (ary, comparator) {
  doQuickSort(ary, comparator, 0, ary.length - 1);
};

var quickSort = {
	quickSort: quickSort_1
};

/* -*- Mode: js; js-indent-level: 2; -*- */

/*
 * Copyright 2011 Mozilla Foundation and contributors
 * Licensed under the New BSD license. See LICENSE or:
 * http://opensource.org/licenses/BSD-3-Clause
 */



var ArraySet$2 = arraySet.ArraySet;

var quickSort$1 = quickSort.quickSort;

function SourceMapConsumer(aSourceMap, aSourceMapURL) {
  var sourceMap = aSourceMap;
  if (typeof aSourceMap === 'string') {
    sourceMap = util.parseSourceMapInput(aSourceMap);
  }

  return sourceMap.sections != null
    ? new IndexedSourceMapConsumer(sourceMap, aSourceMapURL)
    : new BasicSourceMapConsumer(sourceMap, aSourceMapURL);
}

SourceMapConsumer.fromSourceMap = function(aSourceMap, aSourceMapURL) {
  return BasicSourceMapConsumer.fromSourceMap(aSourceMap, aSourceMapURL);
};

/**
 * The version of the source mapping spec that we are consuming.
 */
SourceMapConsumer.prototype._version = 3;

// `__generatedMappings` and `__originalMappings` are arrays that hold the
// parsed mapping coordinates from the source map's "mappings" attribute. They
// are lazily instantiated, accessed via the `_generatedMappings` and
// `_originalMappings` getters respectively, and we only parse the mappings
// and create these arrays once queried for a source location. We jump through
// these hoops because there can be many thousands of mappings, and parsing
// them is expensive, so we only want to do it if we must.
//
// Each object in the arrays is of the form:
//
//     {
//       generatedLine: The line number in the generated code,
//       generatedColumn: The column number in the generated code,
//       source: The path to the original source file that generated this
//               chunk of code,
//       originalLine: The line number in the original source that
//                     corresponds to this chunk of generated code,
//       originalColumn: The column number in the original source that
//                       corresponds to this chunk of generated code,
//       name: The name of the original symbol which generated this chunk of
//             code.
//     }
//
// All properties except for `generatedLine` and `generatedColumn` can be
// `null`.
//
// `_generatedMappings` is ordered by the generated positions.
//
// `_originalMappings` is ordered by the original positions.

SourceMapConsumer.prototype.__generatedMappings = null;
Object.defineProperty(SourceMapConsumer.prototype, '_generatedMappings', {
  configurable: true,
  enumerable: true,
  get: function () {
    if (!this.__generatedMappings) {
      this._parseMappings(this._mappings, this.sourceRoot);
    }

    return this.__generatedMappings;
  }
});

SourceMapConsumer.prototype.__originalMappings = null;
Object.defineProperty(SourceMapConsumer.prototype, '_originalMappings', {
  configurable: true,
  enumerable: true,
  get: function () {
    if (!this.__originalMappings) {
      this._parseMappings(this._mappings, this.sourceRoot);
    }

    return this.__originalMappings;
  }
});

SourceMapConsumer.prototype._charIsMappingSeparator =
  function SourceMapConsumer_charIsMappingSeparator(aStr, index) {
    var c = aStr.charAt(index);
    return c === ";" || c === ",";
  };

/**
 * Parse the mappings in a string in to a data structure which we can easily
 * query (the ordered arrays in the `this.__generatedMappings` and
 * `this.__originalMappings` properties).
 */
SourceMapConsumer.prototype._parseMappings =
  function SourceMapConsumer_parseMappings(aStr, aSourceRoot) {
    throw new Error("Subclasses must implement _parseMappings");
  };

SourceMapConsumer.GENERATED_ORDER = 1;
SourceMapConsumer.ORIGINAL_ORDER = 2;

SourceMapConsumer.GREATEST_LOWER_BOUND = 1;
SourceMapConsumer.LEAST_UPPER_BOUND = 2;

/**
 * Iterate over each mapping between an original source/line/column and a
 * generated line/column in this source map.
 *
 * @param Function aCallback
 *        The function that is called with each mapping.
 * @param Object aContext
 *        Optional. If specified, this object will be the value of `this` every
 *        time that `aCallback` is called.
 * @param aOrder
 *        Either `SourceMapConsumer.GENERATED_ORDER` or
 *        `SourceMapConsumer.ORIGINAL_ORDER`. Specifies whether you want to
 *        iterate over the mappings sorted by the generated file's line/column
 *        order or the original's source/line/column order, respectively. Defaults to
 *        `SourceMapConsumer.GENERATED_ORDER`.
 */
SourceMapConsumer.prototype.eachMapping =
  function SourceMapConsumer_eachMapping(aCallback, aContext, aOrder) {
    var context = aContext || null;
    var order = aOrder || SourceMapConsumer.GENERATED_ORDER;

    var mappings;
    switch (order) {
    case SourceMapConsumer.GENERATED_ORDER:
      mappings = this._generatedMappings;
      break;
    case SourceMapConsumer.ORIGINAL_ORDER:
      mappings = this._originalMappings;
      break;
    default:
      throw new Error("Unknown order of iteration.");
    }

    var sourceRoot = this.sourceRoot;
    mappings.map(function (mapping) {
      var source = mapping.source === null ? null : this._sources.at(mapping.source);
      source = util.computeSourceURL(sourceRoot, source, this._sourceMapURL);
      return {
        source: source,
        generatedLine: mapping.generatedLine,
        generatedColumn: mapping.generatedColumn,
        originalLine: mapping.originalLine,
        originalColumn: mapping.originalColumn,
        name: mapping.name === null ? null : this._names.at(mapping.name)
      };
    }, this).forEach(aCallback, context);
  };

/**
 * Returns all generated line and column information for the original source,
 * line, and column provided. If no column is provided, returns all mappings
 * corresponding to a either the line we are searching for or the next
 * closest line that has any mappings. Otherwise, returns all mappings
 * corresponding to the given line and either the column we are searching for
 * or the next closest column that has any offsets.
 *
 * The only argument is an object with the following properties:
 *
 *   - source: The filename of the original source.
 *   - line: The line number in the original source.  The line number is 1-based.
 *   - column: Optional. the column number in the original source.
 *    The column number is 0-based.
 *
 * and an array of objects is returned, each with the following properties:
 *
 *   - line: The line number in the generated source, or null.  The
 *    line number is 1-based.
 *   - column: The column number in the generated source, or null.
 *    The column number is 0-based.
 */
SourceMapConsumer.prototype.allGeneratedPositionsFor =
  function SourceMapConsumer_allGeneratedPositionsFor(aArgs) {
    var line = util.getArg(aArgs, 'line');

    // When there is no exact match, BasicSourceMapConsumer.prototype._findMapping
    // returns the index of the closest mapping less than the needle. By
    // setting needle.originalColumn to 0, we thus find the last mapping for
    // the given line, provided such a mapping exists.
    var needle = {
      source: util.getArg(aArgs, 'source'),
      originalLine: line,
      originalColumn: util.getArg(aArgs, 'column', 0)
    };

    needle.source = this._findSourceIndex(needle.source);
    if (needle.source < 0) {
      return [];
    }

    var mappings = [];

    var index = this._findMapping(needle,
                                  this._originalMappings,
                                  "originalLine",
                                  "originalColumn",
                                  util.compareByOriginalPositions,
                                  binarySearch.LEAST_UPPER_BOUND);
    if (index >= 0) {
      var mapping = this._originalMappings[index];

      if (aArgs.column === undefined) {
        var originalLine = mapping.originalLine;

        // Iterate until either we run out of mappings, or we run into
        // a mapping for a different line than the one we found. Since
        // mappings are sorted, this is guaranteed to find all mappings for
        // the line we found.
        while (mapping && mapping.originalLine === originalLine) {
          mappings.push({
            line: util.getArg(mapping, 'generatedLine', null),
            column: util.getArg(mapping, 'generatedColumn', null),
            lastColumn: util.getArg(mapping, 'lastGeneratedColumn', null)
          });

          mapping = this._originalMappings[++index];
        }
      } else {
        var originalColumn = mapping.originalColumn;

        // Iterate until either we run out of mappings, or we run into
        // a mapping for a different line than the one we were searching for.
        // Since mappings are sorted, this is guaranteed to find all mappings for
        // the line we are searching for.
        while (mapping &&
               mapping.originalLine === line &&
               mapping.originalColumn == originalColumn) {
          mappings.push({
            line: util.getArg(mapping, 'generatedLine', null),
            column: util.getArg(mapping, 'generatedColumn', null),
            lastColumn: util.getArg(mapping, 'lastGeneratedColumn', null)
          });

          mapping = this._originalMappings[++index];
        }
      }
    }

    return mappings;
  };

var SourceMapConsumer_1 = SourceMapConsumer;

/**
 * A BasicSourceMapConsumer instance represents a parsed source map which we can
 * query for information about the original file positions by giving it a file
 * position in the generated source.
 *
 * The first parameter is the raw source map (either as a JSON string, or
 * already parsed to an object). According to the spec, source maps have the
 * following attributes:
 *
 *   - version: Which version of the source map spec this map is following.
 *   - sources: An array of URLs to the original source files.
 *   - names: An array of identifiers which can be referrenced by individual mappings.
 *   - sourceRoot: Optional. The URL root from which all sources are relative.
 *   - sourcesContent: Optional. An array of contents of the original source files.
 *   - mappings: A string of base64 VLQs which contain the actual mappings.
 *   - file: Optional. The generated file this source map is associated with.
 *
 * Here is an example source map, taken from the source map spec[0]:
 *
 *     {
 *       version : 3,
 *       file: "out.js",
 *       sourceRoot : "",
 *       sources: ["foo.js", "bar.js"],
 *       names: ["src", "maps", "are", "fun"],
 *       mappings: "AA,AB;;ABCDE;"
 *     }
 *
 * The second parameter, if given, is a string whose value is the URL
 * at which the source map was found.  This URL is used to compute the
 * sources array.
 *
 * [0]: https://docs.google.com/document/d/1U1RGAehQwRypUTovF1KRlpiOFze0b-_2gc6fAH0KY0k/edit?pli=1#
 */
function BasicSourceMapConsumer(aSourceMap, aSourceMapURL) {
  var sourceMap = aSourceMap;
  if (typeof aSourceMap === 'string') {
    sourceMap = util.parseSourceMapInput(aSourceMap);
  }

  var version = util.getArg(sourceMap, 'version');
  var sources = util.getArg(sourceMap, 'sources');
  // Sass 3.3 leaves out the 'names' array, so we deviate from the spec (which
  // requires the array) to play nice here.
  var names = util.getArg(sourceMap, 'names', []);
  var sourceRoot = util.getArg(sourceMap, 'sourceRoot', null);
  var sourcesContent = util.getArg(sourceMap, 'sourcesContent', null);
  var mappings = util.getArg(sourceMap, 'mappings');
  var file = util.getArg(sourceMap, 'file', null);

  // Once again, Sass deviates from the spec and supplies the version as a
  // string rather than a number, so we use loose equality checking here.
  if (version != this._version) {
    throw new Error('Unsupported version: ' + version);
  }

  if (sourceRoot) {
    sourceRoot = util.normalize(sourceRoot);
  }

  sources = sources
    .map(String)
    // Some source maps produce relative source paths like "./foo.js" instead of
    // "foo.js".  Normalize these first so that future comparisons will succeed.
    // See bugzil.la/1090768.
    .map(util.normalize)
    // Always ensure that absolute sources are internally stored relative to
    // the source root, if the source root is absolute. Not doing this would
    // be particularly problematic when the source root is a prefix of the
    // source (valid, but why??). See github issue #199 and bugzil.la/1188982.
    .map(function (source) {
      return sourceRoot && util.isAbsolute(sourceRoot) && util.isAbsolute(source)
        ? util.relative(sourceRoot, source)
        : source;
    });

  // Pass `true` below to allow duplicate names and sources. While source maps
  // are intended to be compressed and deduplicated, the TypeScript compiler
  // sometimes generates source maps with duplicates in them. See Github issue
  // #72 and bugzil.la/889492.
  this._names = ArraySet$2.fromArray(names.map(String), true);
  this._sources = ArraySet$2.fromArray(sources, true);

  this._absoluteSources = this._sources.toArray().map(function (s) {
    return util.computeSourceURL(sourceRoot, s, aSourceMapURL);
  });

  this.sourceRoot = sourceRoot;
  this.sourcesContent = sourcesContent;
  this._mappings = mappings;
  this._sourceMapURL = aSourceMapURL;
  this.file = file;
}

BasicSourceMapConsumer.prototype = Object.create(SourceMapConsumer.prototype);
BasicSourceMapConsumer.prototype.consumer = SourceMapConsumer;

/**
 * Utility function to find the index of a source.  Returns -1 if not
 * found.
 */
BasicSourceMapConsumer.prototype._findSourceIndex = function(aSource) {
  var relativeSource = aSource;
  if (this.sourceRoot != null) {
    relativeSource = util.relative(this.sourceRoot, relativeSource);
  }

  if (this._sources.has(relativeSource)) {
    return this._sources.indexOf(relativeSource);
  }

  // Maybe aSource is an absolute URL as returned by |sources|.  In
  // this case we can't simply undo the transform.
  var i;
  for (i = 0; i < this._absoluteSources.length; ++i) {
    if (this._absoluteSources[i] == aSource) {
      return i;
    }
  }

  return -1;
};

/**
 * Create a BasicSourceMapConsumer from a SourceMapGenerator.
 *
 * @param SourceMapGenerator aSourceMap
 *        The source map that will be consumed.
 * @param String aSourceMapURL
 *        The URL at which the source map can be found (optional)
 * @returns BasicSourceMapConsumer
 */
BasicSourceMapConsumer.fromSourceMap =
  function SourceMapConsumer_fromSourceMap(aSourceMap, aSourceMapURL) {
    var smc = Object.create(BasicSourceMapConsumer.prototype);

    var names = smc._names = ArraySet$2.fromArray(aSourceMap._names.toArray(), true);
    var sources = smc._sources = ArraySet$2.fromArray(aSourceMap._sources.toArray(), true);
    smc.sourceRoot = aSourceMap._sourceRoot;
    smc.sourcesContent = aSourceMap._generateSourcesContent(smc._sources.toArray(),
                                                            smc.sourceRoot);
    smc.file = aSourceMap._file;
    smc._sourceMapURL = aSourceMapURL;
    smc._absoluteSources = smc._sources.toArray().map(function (s) {
      return util.computeSourceURL(smc.sourceRoot, s, aSourceMapURL);
    });

    // Because we are modifying the entries (by converting string sources and
    // names to indices into the sources and names ArraySets), we have to make
    // a copy of the entry or else bad things happen. Shared mutable state
    // strikes again! See github issue #191.

    var generatedMappings = aSourceMap._mappings.toArray().slice();
    var destGeneratedMappings = smc.__generatedMappings = [];
    var destOriginalMappings = smc.__originalMappings = [];

    for (var i = 0, length = generatedMappings.length; i < length; i++) {
      var srcMapping = generatedMappings[i];
      var destMapping = new Mapping;
      destMapping.generatedLine = srcMapping.generatedLine;
      destMapping.generatedColumn = srcMapping.generatedColumn;

      if (srcMapping.source) {
        destMapping.source = sources.indexOf(srcMapping.source);
        destMapping.originalLine = srcMapping.originalLine;
        destMapping.originalColumn = srcMapping.originalColumn;

        if (srcMapping.name) {
          destMapping.name = names.indexOf(srcMapping.name);
        }

        destOriginalMappings.push(destMapping);
      }

      destGeneratedMappings.push(destMapping);
    }

    quickSort$1(smc.__originalMappings, util.compareByOriginalPositions);

    return smc;
  };

/**
 * The version of the source mapping spec that we are consuming.
 */
BasicSourceMapConsumer.prototype._version = 3;

/**
 * The list of original sources.
 */
Object.defineProperty(BasicSourceMapConsumer.prototype, 'sources', {
  get: function () {
    return this._absoluteSources.slice();
  }
});

/**
 * Provide the JIT with a nice shape / hidden class.
 */
function Mapping() {
  this.generatedLine = 0;
  this.generatedColumn = 0;
  this.source = null;
  this.originalLine = null;
  this.originalColumn = null;
  this.name = null;
}

/**
 * Parse the mappings in a string in to a data structure which we can easily
 * query (the ordered arrays in the `this.__generatedMappings` and
 * `this.__originalMappings` properties).
 */
BasicSourceMapConsumer.prototype._parseMappings =
  function SourceMapConsumer_parseMappings(aStr, aSourceRoot) {
    var generatedLine = 1;
    var previousGeneratedColumn = 0;
    var previousOriginalLine = 0;
    var previousOriginalColumn = 0;
    var previousSource = 0;
    var previousName = 0;
    var length = aStr.length;
    var index = 0;
    var cachedSegments = {};
    var temp = {};
    var originalMappings = [];
    var generatedMappings = [];
    var mapping, str, segment, end, value;

    while (index < length) {
      if (aStr.charAt(index) === ';') {
        generatedLine++;
        index++;
        previousGeneratedColumn = 0;
      }
      else if (aStr.charAt(index) === ',') {
        index++;
      }
      else {
        mapping = new Mapping();
        mapping.generatedLine = generatedLine;

        // Because each offset is encoded relative to the previous one,
        // many segments often have the same encoding. We can exploit this
        // fact by caching the parsed variable length fields of each segment,
        // allowing us to avoid a second parse if we encounter the same
        // segment again.
        for (end = index; end < length; end++) {
          if (this._charIsMappingSeparator(aStr, end)) {
            break;
          }
        }
        str = aStr.slice(index, end);

        segment = cachedSegments[str];
        if (segment) {
          index += str.length;
        } else {
          segment = [];
          while (index < end) {
            base64Vlq.decode(aStr, index, temp);
            value = temp.value;
            index = temp.rest;
            segment.push(value);
          }

          if (segment.length === 2) {
            throw new Error('Found a source, but no line and column');
          }

          if (segment.length === 3) {
            throw new Error('Found a source and line, but no column');
          }

          cachedSegments[str] = segment;
        }

        // Generated column.
        mapping.generatedColumn = previousGeneratedColumn + segment[0];
        previousGeneratedColumn = mapping.generatedColumn;

        if (segment.length > 1) {
          // Original source.
          mapping.source = previousSource + segment[1];
          previousSource += segment[1];

          // Original line.
          mapping.originalLine = previousOriginalLine + segment[2];
          previousOriginalLine = mapping.originalLine;
          // Lines are stored 0-based
          mapping.originalLine += 1;

          // Original column.
          mapping.originalColumn = previousOriginalColumn + segment[3];
          previousOriginalColumn = mapping.originalColumn;

          if (segment.length > 4) {
            // Original name.
            mapping.name = previousName + segment[4];
            previousName += segment[4];
          }
        }

        generatedMappings.push(mapping);
        if (typeof mapping.originalLine === 'number') {
          originalMappings.push(mapping);
        }
      }
    }

    quickSort$1(generatedMappings, util.compareByGeneratedPositionsDeflated);
    this.__generatedMappings = generatedMappings;

    quickSort$1(originalMappings, util.compareByOriginalPositions);
    this.__originalMappings = originalMappings;
  };

/**
 * Find the mapping that best matches the hypothetical "needle" mapping that
 * we are searching for in the given "haystack" of mappings.
 */
BasicSourceMapConsumer.prototype._findMapping =
  function SourceMapConsumer_findMapping(aNeedle, aMappings, aLineName,
                                         aColumnName, aComparator, aBias) {
    // To return the position we are searching for, we must first find the
    // mapping for the given position and then return the opposite position it
    // points to. Because the mappings are sorted, we can use binary search to
    // find the best mapping.

    if (aNeedle[aLineName] <= 0) {
      throw new TypeError('Line must be greater than or equal to 1, got '
                          + aNeedle[aLineName]);
    }
    if (aNeedle[aColumnName] < 0) {
      throw new TypeError('Column must be greater than or equal to 0, got '
                          + aNeedle[aColumnName]);
    }

    return binarySearch.search(aNeedle, aMappings, aComparator, aBias);
  };

/**
 * Compute the last column for each generated mapping. The last column is
 * inclusive.
 */
BasicSourceMapConsumer.prototype.computeColumnSpans =
  function SourceMapConsumer_computeColumnSpans() {
    for (var index = 0; index < this._generatedMappings.length; ++index) {
      var mapping = this._generatedMappings[index];

      // Mappings do not contain a field for the last generated columnt. We
      // can come up with an optimistic estimate, however, by assuming that
      // mappings are contiguous (i.e. given two consecutive mappings, the
      // first mapping ends where the second one starts).
      if (index + 1 < this._generatedMappings.length) {
        var nextMapping = this._generatedMappings[index + 1];

        if (mapping.generatedLine === nextMapping.generatedLine) {
          mapping.lastGeneratedColumn = nextMapping.generatedColumn - 1;
          continue;
        }
      }

      // The last mapping for each line spans the entire line.
      mapping.lastGeneratedColumn = Infinity;
    }
  };

/**
 * Returns the original source, line, and column information for the generated
 * source's line and column positions provided. The only argument is an object
 * with the following properties:
 *
 *   - line: The line number in the generated source.  The line number
 *     is 1-based.
 *   - column: The column number in the generated source.  The column
 *     number is 0-based.
 *   - bias: Either 'SourceMapConsumer.GREATEST_LOWER_BOUND' or
 *     'SourceMapConsumer.LEAST_UPPER_BOUND'. Specifies whether to return the
 *     closest element that is smaller than or greater than the one we are
 *     searching for, respectively, if the exact element cannot be found.
 *     Defaults to 'SourceMapConsumer.GREATEST_LOWER_BOUND'.
 *
 * and an object is returned with the following properties:
 *
 *   - source: The original source file, or null.
 *   - line: The line number in the original source, or null.  The
 *     line number is 1-based.
 *   - column: The column number in the original source, or null.  The
 *     column number is 0-based.
 *   - name: The original identifier, or null.
 */
BasicSourceMapConsumer.prototype.originalPositionFor =
  function SourceMapConsumer_originalPositionFor(aArgs) {
    var needle = {
      generatedLine: util.getArg(aArgs, 'line'),
      generatedColumn: util.getArg(aArgs, 'column')
    };

    var index = this._findMapping(
      needle,
      this._generatedMappings,
      "generatedLine",
      "generatedColumn",
      util.compareByGeneratedPositionsDeflated,
      util.getArg(aArgs, 'bias', SourceMapConsumer.GREATEST_LOWER_BOUND)
    );

    if (index >= 0) {
      var mapping = this._generatedMappings[index];

      if (mapping.generatedLine === needle.generatedLine) {
        var source = util.getArg(mapping, 'source', null);
        if (source !== null) {
          source = this._sources.at(source);
          source = util.computeSourceURL(this.sourceRoot, source, this._sourceMapURL);
        }
        var name = util.getArg(mapping, 'name', null);
        if (name !== null) {
          name = this._names.at(name);
        }
        return {
          source: source,
          line: util.getArg(mapping, 'originalLine', null),
          column: util.getArg(mapping, 'originalColumn', null),
          name: name
        };
      }
    }

    return {
      source: null,
      line: null,
      column: null,
      name: null
    };
  };

/**
 * Return true if we have the source content for every source in the source
 * map, false otherwise.
 */
BasicSourceMapConsumer.prototype.hasContentsOfAllSources =
  function BasicSourceMapConsumer_hasContentsOfAllSources() {
    if (!this.sourcesContent) {
      return false;
    }
    return this.sourcesContent.length >= this._sources.size() &&
      !this.sourcesContent.some(function (sc) { return sc == null; });
  };

/**
 * Returns the original source content. The only argument is the url of the
 * original source file. Returns null if no original source content is
 * available.
 */
BasicSourceMapConsumer.prototype.sourceContentFor =
  function SourceMapConsumer_sourceContentFor(aSource, nullOnMissing) {
    if (!this.sourcesContent) {
      return null;
    }

    var index = this._findSourceIndex(aSource);
    if (index >= 0) {
      return this.sourcesContent[index];
    }

    var relativeSource = aSource;
    if (this.sourceRoot != null) {
      relativeSource = util.relative(this.sourceRoot, relativeSource);
    }

    var url;
    if (this.sourceRoot != null
        && (url = util.urlParse(this.sourceRoot))) {
      // XXX: file:// URIs and absolute paths lead to unexpected behavior for
      // many users. We can help them out when they expect file:// URIs to
      // behave like it would if they were running a local HTTP server. See
      // https://bugzilla.mozilla.org/show_bug.cgi?id=885597.
      var fileUriAbsPath = relativeSource.replace(/^file:\/\//, "");
      if (url.scheme == "file"
          && this._sources.has(fileUriAbsPath)) {
        return this.sourcesContent[this._sources.indexOf(fileUriAbsPath)]
      }

      if ((!url.path || url.path == "/")
          && this._sources.has("/" + relativeSource)) {
        return this.sourcesContent[this._sources.indexOf("/" + relativeSource)];
      }
    }

    // This function is used recursively from
    // IndexedSourceMapConsumer.prototype.sourceContentFor. In that case, we
    // don't want to throw if we can't find the source - we just want to
    // return null, so we provide a flag to exit gracefully.
    if (nullOnMissing) {
      return null;
    }
    else {
      throw new Error('"' + relativeSource + '" is not in the SourceMap.');
    }
  };

/**
 * Returns the generated line and column information for the original source,
 * line, and column positions provided. The only argument is an object with
 * the following properties:
 *
 *   - source: The filename of the original source.
 *   - line: The line number in the original source.  The line number
 *     is 1-based.
 *   - column: The column number in the original source.  The column
 *     number is 0-based.
 *   - bias: Either 'SourceMapConsumer.GREATEST_LOWER_BOUND' or
 *     'SourceMapConsumer.LEAST_UPPER_BOUND'. Specifies whether to return the
 *     closest element that is smaller than or greater than the one we are
 *     searching for, respectively, if the exact element cannot be found.
 *     Defaults to 'SourceMapConsumer.GREATEST_LOWER_BOUND'.
 *
 * and an object is returned with the following properties:
 *
 *   - line: The line number in the generated source, or null.  The
 *     line number is 1-based.
 *   - column: The column number in the generated source, or null.
 *     The column number is 0-based.
 */
BasicSourceMapConsumer.prototype.generatedPositionFor =
  function SourceMapConsumer_generatedPositionFor(aArgs) {
    var source = util.getArg(aArgs, 'source');
    source = this._findSourceIndex(source);
    if (source < 0) {
      return {
        line: null,
        column: null,
        lastColumn: null
      };
    }

    var needle = {
      source: source,
      originalLine: util.getArg(aArgs, 'line'),
      originalColumn: util.getArg(aArgs, 'column')
    };

    var index = this._findMapping(
      needle,
      this._originalMappings,
      "originalLine",
      "originalColumn",
      util.compareByOriginalPositions,
      util.getArg(aArgs, 'bias', SourceMapConsumer.GREATEST_LOWER_BOUND)
    );

    if (index >= 0) {
      var mapping = this._originalMappings[index];

      if (mapping.source === needle.source) {
        return {
          line: util.getArg(mapping, 'generatedLine', null),
          column: util.getArg(mapping, 'generatedColumn', null),
          lastColumn: util.getArg(mapping, 'lastGeneratedColumn', null)
        };
      }
    }

    return {
      line: null,
      column: null,
      lastColumn: null
    };
  };

var BasicSourceMapConsumer_1 = BasicSourceMapConsumer;

/**
 * An IndexedSourceMapConsumer instance represents a parsed source map which
 * we can query for information. It differs from BasicSourceMapConsumer in
 * that it takes "indexed" source maps (i.e. ones with a "sections" field) as
 * input.
 *
 * The first parameter is a raw source map (either as a JSON string, or already
 * parsed to an object). According to the spec for indexed source maps, they
 * have the following attributes:
 *
 *   - version: Which version of the source map spec this map is following.
 *   - file: Optional. The generated file this source map is associated with.
 *   - sections: A list of section definitions.
 *
 * Each value under the "sections" field has two fields:
 *   - offset: The offset into the original specified at which this section
 *       begins to apply, defined as an object with a "line" and "column"
 *       field.
 *   - map: A source map definition. This source map could also be indexed,
 *       but doesn't have to be.
 *
 * Instead of the "map" field, it's also possible to have a "url" field
 * specifying a URL to retrieve a source map from, but that's currently
 * unsupported.
 *
 * Here's an example source map, taken from the source map spec[0], but
 * modified to omit a section which uses the "url" field.
 *
 *  {
 *    version : 3,
 *    file: "app.js",
 *    sections: [{
 *      offset: {line:100, column:10},
 *      map: {
 *        version : 3,
 *        file: "section.js",
 *        sources: ["foo.js", "bar.js"],
 *        names: ["src", "maps", "are", "fun"],
 *        mappings: "AAAA,E;;ABCDE;"
 *      }
 *    }],
 *  }
 *
 * The second parameter, if given, is a string whose value is the URL
 * at which the source map was found.  This URL is used to compute the
 * sources array.
 *
 * [0]: https://docs.google.com/document/d/1U1RGAehQwRypUTovF1KRlpiOFze0b-_2gc6fAH0KY0k/edit#heading=h.535es3xeprgt
 */
function IndexedSourceMapConsumer(aSourceMap, aSourceMapURL) {
  var sourceMap = aSourceMap;
  if (typeof aSourceMap === 'string') {
    sourceMap = util.parseSourceMapInput(aSourceMap);
  }

  var version = util.getArg(sourceMap, 'version');
  var sections = util.getArg(sourceMap, 'sections');

  if (version != this._version) {
    throw new Error('Unsupported version: ' + version);
  }

  this._sources = new ArraySet$2();
  this._names = new ArraySet$2();

  var lastOffset = {
    line: -1,
    column: 0
  };
  this._sections = sections.map(function (s) {
    if (s.url) {
      // The url field will require support for asynchronicity.
      // See https://github.com/mozilla/source-map/issues/16
      throw new Error('Support for url field in sections not implemented.');
    }
    var offset = util.getArg(s, 'offset');
    var offsetLine = util.getArg(offset, 'line');
    var offsetColumn = util.getArg(offset, 'column');

    if (offsetLine < lastOffset.line ||
        (offsetLine === lastOffset.line && offsetColumn < lastOffset.column)) {
      throw new Error('Section offsets must be ordered and non-overlapping.');
    }
    lastOffset = offset;

    return {
      generatedOffset: {
        // The offset fields are 0-based, but we use 1-based indices when
        // encoding/decoding from VLQ.
        generatedLine: offsetLine + 1,
        generatedColumn: offsetColumn + 1
      },
      consumer: new SourceMapConsumer(util.getArg(s, 'map'), aSourceMapURL)
    }
  });
}

IndexedSourceMapConsumer.prototype = Object.create(SourceMapConsumer.prototype);
IndexedSourceMapConsumer.prototype.constructor = SourceMapConsumer;

/**
 * The version of the source mapping spec that we are consuming.
 */
IndexedSourceMapConsumer.prototype._version = 3;

/**
 * The list of original sources.
 */
Object.defineProperty(IndexedSourceMapConsumer.prototype, 'sources', {
  get: function () {
    var sources = [];
    for (var i = 0; i < this._sections.length; i++) {
      for (var j = 0; j < this._sections[i].consumer.sources.length; j++) {
        sources.push(this._sections[i].consumer.sources[j]);
      }
    }
    return sources;
  }
});

/**
 * Returns the original source, line, and column information for the generated
 * source's line and column positions provided. The only argument is an object
 * with the following properties:
 *
 *   - line: The line number in the generated source.  The line number
 *     is 1-based.
 *   - column: The column number in the generated source.  The column
 *     number is 0-based.
 *
 * and an object is returned with the following properties:
 *
 *   - source: The original source file, or null.
 *   - line: The line number in the original source, or null.  The
 *     line number is 1-based.
 *   - column: The column number in the original source, or null.  The
 *     column number is 0-based.
 *   - name: The original identifier, or null.
 */
IndexedSourceMapConsumer.prototype.originalPositionFor =
  function IndexedSourceMapConsumer_originalPositionFor(aArgs) {
    var needle = {
      generatedLine: util.getArg(aArgs, 'line'),
      generatedColumn: util.getArg(aArgs, 'column')
    };

    // Find the section containing the generated position we're trying to map
    // to an original position.
    var sectionIndex = binarySearch.search(needle, this._sections,
      function(needle, section) {
        var cmp = needle.generatedLine - section.generatedOffset.generatedLine;
        if (cmp) {
          return cmp;
        }

        return (needle.generatedColumn -
                section.generatedOffset.generatedColumn);
      });
    var section = this._sections[sectionIndex];

    if (!section) {
      return {
        source: null,
        line: null,
        column: null,
        name: null
      };
    }

    return section.consumer.originalPositionFor({
      line: needle.generatedLine -
        (section.generatedOffset.generatedLine - 1),
      column: needle.generatedColumn -
        (section.generatedOffset.generatedLine === needle.generatedLine
         ? section.generatedOffset.generatedColumn - 1
         : 0),
      bias: aArgs.bias
    });
  };

/**
 * Return true if we have the source content for every source in the source
 * map, false otherwise.
 */
IndexedSourceMapConsumer.prototype.hasContentsOfAllSources =
  function IndexedSourceMapConsumer_hasContentsOfAllSources() {
    return this._sections.every(function (s) {
      return s.consumer.hasContentsOfAllSources();
    });
  };

/**
 * Returns the original source content. The only argument is the url of the
 * original source file. Returns null if no original source content is
 * available.
 */
IndexedSourceMapConsumer.prototype.sourceContentFor =
  function IndexedSourceMapConsumer_sourceContentFor(aSource, nullOnMissing) {
    for (var i = 0; i < this._sections.length; i++) {
      var section = this._sections[i];

      var content = section.consumer.sourceContentFor(aSource, true);
      if (content) {
        return content;
      }
    }
    if (nullOnMissing) {
      return null;
    }
    else {
      throw new Error('"' + aSource + '" is not in the SourceMap.');
    }
  };

/**
 * Returns the generated line and column information for the original source,
 * line, and column positions provided. The only argument is an object with
 * the following properties:
 *
 *   - source: The filename of the original source.
 *   - line: The line number in the original source.  The line number
 *     is 1-based.
 *   - column: The column number in the original source.  The column
 *     number is 0-based.
 *
 * and an object is returned with the following properties:
 *
 *   - line: The line number in the generated source, or null.  The
 *     line number is 1-based. 
 *   - column: The column number in the generated source, or null.
 *     The column number is 0-based.
 */
IndexedSourceMapConsumer.prototype.generatedPositionFor =
  function IndexedSourceMapConsumer_generatedPositionFor(aArgs) {
    for (var i = 0; i < this._sections.length; i++) {
      var section = this._sections[i];

      // Only consider this section if the requested source is in the list of
      // sources of the consumer.
      if (section.consumer._findSourceIndex(util.getArg(aArgs, 'source')) === -1) {
        continue;
      }
      var generatedPosition = section.consumer.generatedPositionFor(aArgs);
      if (generatedPosition) {
        var ret = {
          line: generatedPosition.line +
            (section.generatedOffset.generatedLine - 1),
          column: generatedPosition.column +
            (section.generatedOffset.generatedLine === generatedPosition.line
             ? section.generatedOffset.generatedColumn - 1
             : 0)
        };
        return ret;
      }
    }

    return {
      line: null,
      column: null
    };
  };

/**
 * Parse the mappings in a string in to a data structure which we can easily
 * query (the ordered arrays in the `this.__generatedMappings` and
 * `this.__originalMappings` properties).
 */
IndexedSourceMapConsumer.prototype._parseMappings =
  function IndexedSourceMapConsumer_parseMappings(aStr, aSourceRoot) {
    this.__generatedMappings = [];
    this.__originalMappings = [];
    for (var i = 0; i < this._sections.length; i++) {
      var section = this._sections[i];
      var sectionMappings = section.consumer._generatedMappings;
      for (var j = 0; j < sectionMappings.length; j++) {
        var mapping = sectionMappings[j];

        var source = section.consumer._sources.at(mapping.source);
        source = util.computeSourceURL(section.consumer.sourceRoot, source, this._sourceMapURL);
        this._sources.add(source);
        source = this._sources.indexOf(source);

        var name = null;
        if (mapping.name) {
          name = section.consumer._names.at(mapping.name);
          this._names.add(name);
          name = this._names.indexOf(name);
        }

        // The mappings coming from the consumer for the section have
        // generated positions relative to the start of the section, so we
        // need to offset them to be relative to the start of the concatenated
        // generated file.
        var adjustedMapping = {
          source: source,
          generatedLine: mapping.generatedLine +
            (section.generatedOffset.generatedLine - 1),
          generatedColumn: mapping.generatedColumn +
            (section.generatedOffset.generatedLine === mapping.generatedLine
            ? section.generatedOffset.generatedColumn - 1
            : 0),
          originalLine: mapping.originalLine,
          originalColumn: mapping.originalColumn,
          name: name
        };

        this.__generatedMappings.push(adjustedMapping);
        if (typeof adjustedMapping.originalLine === 'number') {
          this.__originalMappings.push(adjustedMapping);
        }
      }
    }

    quickSort$1(this.__generatedMappings, util.compareByGeneratedPositionsDeflated);
    quickSort$1(this.__originalMappings, util.compareByOriginalPositions);
  };

var IndexedSourceMapConsumer_1 = IndexedSourceMapConsumer;

var sourceMapConsumer = {
	SourceMapConsumer: SourceMapConsumer_1,
	BasicSourceMapConsumer: BasicSourceMapConsumer_1,
	IndexedSourceMapConsumer: IndexedSourceMapConsumer_1
};

/* -*- Mode: js; js-indent-level: 2; -*- */

/*
 * Copyright 2011 Mozilla Foundation and contributors
 * Licensed under the New BSD license. See LICENSE or:
 * http://opensource.org/licenses/BSD-3-Clause
 */

var SourceMapGenerator$1 = sourceMapGenerator.SourceMapGenerator;


// Matches a Windows-style `\r\n` newline or a `\n` newline used by all other
// operating systems these days (capturing the result).
var REGEX_NEWLINE = /(\r?\n)/;

// Newline character code for charCodeAt() comparisons
var NEWLINE_CODE = 10;

// Private symbol for identifying `SourceNode`s when multiple versions of
// the source-map library are loaded. This MUST NOT CHANGE across
// versions!
var isSourceNode = "$$$isSourceNode$$$";

/**
 * SourceNodes provide a way to abstract over interpolating/concatenating
 * snippets of generated JavaScript source code while maintaining the line and
 * column information associated with the original source code.
 *
 * @param aLine The original line number.
 * @param aColumn The original column number.
 * @param aSource The original source's filename.
 * @param aChunks Optional. An array of strings which are snippets of
 *        generated JS, or other SourceNodes.
 * @param aName The original identifier.
 */
function SourceNode(aLine, aColumn, aSource, aChunks, aName) {
  this.children = [];
  this.sourceContents = {};
  this.line = aLine == null ? null : aLine;
  this.column = aColumn == null ? null : aColumn;
  this.source = aSource == null ? null : aSource;
  this.name = aName == null ? null : aName;
  this[isSourceNode] = true;
  if (aChunks != null) this.add(aChunks);
}

/**
 * Creates a SourceNode from generated code and a SourceMapConsumer.
 *
 * @param aGeneratedCode The generated code
 * @param aSourceMapConsumer The SourceMap for the generated code
 * @param aRelativePath Optional. The path that relative sources in the
 *        SourceMapConsumer should be relative to.
 */
SourceNode.fromStringWithSourceMap =
  function SourceNode_fromStringWithSourceMap(aGeneratedCode, aSourceMapConsumer, aRelativePath) {
    // The SourceNode we want to fill with the generated code
    // and the SourceMap
    var node = new SourceNode();

    // All even indices of this array are one line of the generated code,
    // while all odd indices are the newlines between two adjacent lines
    // (since `REGEX_NEWLINE` captures its match).
    // Processed fragments are accessed by calling `shiftNextLine`.
    var remainingLines = aGeneratedCode.split(REGEX_NEWLINE);
    var remainingLinesIndex = 0;
    var shiftNextLine = function() {
      var lineContents = getNextLine();
      // The last line of a file might not have a newline.
      var newLine = getNextLine() || "";
      return lineContents + newLine;

      function getNextLine() {
        return remainingLinesIndex < remainingLines.length ?
            remainingLines[remainingLinesIndex++] : undefined;
      }
    };

    // We need to remember the position of "remainingLines"
    var lastGeneratedLine = 1, lastGeneratedColumn = 0;

    // The generate SourceNodes we need a code range.
    // To extract it current and last mapping is used.
    // Here we store the last mapping.
    var lastMapping = null;

    aSourceMapConsumer.eachMapping(function (mapping) {
      if (lastMapping !== null) {
        // We add the code from "lastMapping" to "mapping":
        // First check if there is a new line in between.
        if (lastGeneratedLine < mapping.generatedLine) {
          // Associate first line with "lastMapping"
          addMappingWithCode(lastMapping, shiftNextLine());
          lastGeneratedLine++;
          lastGeneratedColumn = 0;
          // The remaining code is added without mapping
        } else {
          // There is no new line in between.
          // Associate the code between "lastGeneratedColumn" and
          // "mapping.generatedColumn" with "lastMapping"
          var nextLine = remainingLines[remainingLinesIndex] || '';
          var code = nextLine.substr(0, mapping.generatedColumn -
                                        lastGeneratedColumn);
          remainingLines[remainingLinesIndex] = nextLine.substr(mapping.generatedColumn -
                                              lastGeneratedColumn);
          lastGeneratedColumn = mapping.generatedColumn;
          addMappingWithCode(lastMapping, code);
          // No more remaining code, continue
          lastMapping = mapping;
          return;
        }
      }
      // We add the generated code until the first mapping
      // to the SourceNode without any mapping.
      // Each line is added as separate string.
      while (lastGeneratedLine < mapping.generatedLine) {
        node.add(shiftNextLine());
        lastGeneratedLine++;
      }
      if (lastGeneratedColumn < mapping.generatedColumn) {
        var nextLine = remainingLines[remainingLinesIndex] || '';
        node.add(nextLine.substr(0, mapping.generatedColumn));
        remainingLines[remainingLinesIndex] = nextLine.substr(mapping.generatedColumn);
        lastGeneratedColumn = mapping.generatedColumn;
      }
      lastMapping = mapping;
    }, this);
    // We have processed all mappings.
    if (remainingLinesIndex < remainingLines.length) {
      if (lastMapping) {
        // Associate the remaining code in the current line with "lastMapping"
        addMappingWithCode(lastMapping, shiftNextLine());
      }
      // and add the remaining lines without any mapping
      node.add(remainingLines.splice(remainingLinesIndex).join(""));
    }

    // Copy sourcesContent into SourceNode
    aSourceMapConsumer.sources.forEach(function (sourceFile) {
      var content = aSourceMapConsumer.sourceContentFor(sourceFile);
      if (content != null) {
        if (aRelativePath != null) {
          sourceFile = util.join(aRelativePath, sourceFile);
        }
        node.setSourceContent(sourceFile, content);
      }
    });

    return node;

    function addMappingWithCode(mapping, code) {
      if (mapping === null || mapping.source === undefined) {
        node.add(code);
      } else {
        var source = aRelativePath
          ? util.join(aRelativePath, mapping.source)
          : mapping.source;
        node.add(new SourceNode(mapping.originalLine,
                                mapping.originalColumn,
                                source,
                                code,
                                mapping.name));
      }
    }
  };

/**
 * Add a chunk of generated JS to this source node.
 *
 * @param aChunk A string snippet of generated JS code, another instance of
 *        SourceNode, or an array where each member is one of those things.
 */
SourceNode.prototype.add = function SourceNode_add(aChunk) {
  if (Array.isArray(aChunk)) {
    aChunk.forEach(function (chunk) {
      this.add(chunk);
    }, this);
  }
  else if (aChunk[isSourceNode] || typeof aChunk === "string") {
    if (aChunk) {
      this.children.push(aChunk);
    }
  }
  else {
    throw new TypeError(
      "Expected a SourceNode, string, or an array of SourceNodes and strings. Got " + aChunk
    );
  }
  return this;
};

/**
 * Add a chunk of generated JS to the beginning of this source node.
 *
 * @param aChunk A string snippet of generated JS code, another instance of
 *        SourceNode, or an array where each member is one of those things.
 */
SourceNode.prototype.prepend = function SourceNode_prepend(aChunk) {
  if (Array.isArray(aChunk)) {
    for (var i = aChunk.length-1; i >= 0; i--) {
      this.prepend(aChunk[i]);
    }
  }
  else if (aChunk[isSourceNode] || typeof aChunk === "string") {
    this.children.unshift(aChunk);
  }
  else {
    throw new TypeError(
      "Expected a SourceNode, string, or an array of SourceNodes and strings. Got " + aChunk
    );
  }
  return this;
};

/**
 * Walk over the tree of JS snippets in this node and its children. The
 * walking function is called once for each snippet of JS and is passed that
 * snippet and the its original associated source's line/column location.
 *
 * @param aFn The traversal function.
 */
SourceNode.prototype.walk = function SourceNode_walk(aFn) {
  var chunk;
  for (var i = 0, len = this.children.length; i < len; i++) {
    chunk = this.children[i];
    if (chunk[isSourceNode]) {
      chunk.walk(aFn);
    }
    else {
      if (chunk !== '') {
        aFn(chunk, { source: this.source,
                     line: this.line,
                     column: this.column,
                     name: this.name });
      }
    }
  }
};

/**
 * Like `String.prototype.join` except for SourceNodes. Inserts `aStr` between
 * each of `this.children`.
 *
 * @param aSep The separator.
 */
SourceNode.prototype.join = function SourceNode_join(aSep) {
  var newChildren;
  var i;
  var len = this.children.length;
  if (len > 0) {
    newChildren = [];
    for (i = 0; i < len-1; i++) {
      newChildren.push(this.children[i]);
      newChildren.push(aSep);
    }
    newChildren.push(this.children[i]);
    this.children = newChildren;
  }
  return this;
};

/**
 * Call String.prototype.replace on the very right-most source snippet. Useful
 * for trimming whitespace from the end of a source node, etc.
 *
 * @param aPattern The pattern to replace.
 * @param aReplacement The thing to replace the pattern with.
 */
SourceNode.prototype.replaceRight = function SourceNode_replaceRight(aPattern, aReplacement) {
  var lastChild = this.children[this.children.length - 1];
  if (lastChild[isSourceNode]) {
    lastChild.replaceRight(aPattern, aReplacement);
  }
  else if (typeof lastChild === 'string') {
    this.children[this.children.length - 1] = lastChild.replace(aPattern, aReplacement);
  }
  else {
    this.children.push(''.replace(aPattern, aReplacement));
  }
  return this;
};

/**
 * Set the source content for a source file. This will be added to the SourceMapGenerator
 * in the sourcesContent field.
 *
 * @param aSourceFile The filename of the source file
 * @param aSourceContent The content of the source file
 */
SourceNode.prototype.setSourceContent =
  function SourceNode_setSourceContent(aSourceFile, aSourceContent) {
    this.sourceContents[util.toSetString(aSourceFile)] = aSourceContent;
  };

/**
 * Walk over the tree of SourceNodes. The walking function is called for each
 * source file content and is passed the filename and source content.
 *
 * @param aFn The traversal function.
 */
SourceNode.prototype.walkSourceContents =
  function SourceNode_walkSourceContents(aFn) {
    for (var i = 0, len = this.children.length; i < len; i++) {
      if (this.children[i][isSourceNode]) {
        this.children[i].walkSourceContents(aFn);
      }
    }

    var sources = Object.keys(this.sourceContents);
    for (var i = 0, len = sources.length; i < len; i++) {
      aFn(util.fromSetString(sources[i]), this.sourceContents[sources[i]]);
    }
  };

/**
 * Return the string representation of this source node. Walks over the tree
 * and concatenates all the various snippets together to one string.
 */
SourceNode.prototype.toString = function SourceNode_toString() {
  var str = "";
  this.walk(function (chunk) {
    str += chunk;
  });
  return str;
};

/**
 * Returns the string representation of this source node along with a source
 * map.
 */
SourceNode.prototype.toStringWithSourceMap = function SourceNode_toStringWithSourceMap(aArgs) {
  var generated = {
    code: "",
    line: 1,
    column: 0
  };
  var map = new SourceMapGenerator$1(aArgs);
  var sourceMappingActive = false;
  var lastOriginalSource = null;
  var lastOriginalLine = null;
  var lastOriginalColumn = null;
  var lastOriginalName = null;
  this.walk(function (chunk, original) {
    generated.code += chunk;
    if (original.source !== null
        && original.line !== null
        && original.column !== null) {
      if(lastOriginalSource !== original.source
         || lastOriginalLine !== original.line
         || lastOriginalColumn !== original.column
         || lastOriginalName !== original.name) {
        map.addMapping({
          source: original.source,
          original: {
            line: original.line,
            column: original.column
          },
          generated: {
            line: generated.line,
            column: generated.column
          },
          name: original.name
        });
      }
      lastOriginalSource = original.source;
      lastOriginalLine = original.line;
      lastOriginalColumn = original.column;
      lastOriginalName = original.name;
      sourceMappingActive = true;
    } else if (sourceMappingActive) {
      map.addMapping({
        generated: {
          line: generated.line,
          column: generated.column
        }
      });
      lastOriginalSource = null;
      sourceMappingActive = false;
    }
    for (var idx = 0, length = chunk.length; idx < length; idx++) {
      if (chunk.charCodeAt(idx) === NEWLINE_CODE) {
        generated.line++;
        generated.column = 0;
        // Mappings end at eol
        if (idx + 1 === length) {
          lastOriginalSource = null;
          sourceMappingActive = false;
        } else if (sourceMappingActive) {
          map.addMapping({
            source: original.source,
            original: {
              line: original.line,
              column: original.column
            },
            generated: {
              line: generated.line,
              column: generated.column
            },
            name: original.name
          });
        }
      } else {
        generated.column++;
      }
    }
  });
  this.walkSourceContents(function (sourceFile, sourceContent) {
    map.setSourceContent(sourceFile, sourceContent);
  });

  return { code: generated.code, map: map };
};

var SourceNode_1 = SourceNode;

var sourceNode = {
	SourceNode: SourceNode_1
};

/*
 * Copyright 2009-2011 Mozilla Foundation and contributors
 * Licensed under the New BSD license. See LICENSE.txt or:
 * http://opensource.org/licenses/BSD-3-Clause
 */

var SourceMapGenerator$2 = sourceMapGenerator.SourceMapGenerator;
var SourceMapConsumer$1 = sourceMapConsumer.SourceMapConsumer;
var SourceNode$1 = sourceNode.SourceNode;

var sourceMap = {
	SourceMapGenerator: SourceMapGenerator$2,
	SourceMapConsumer: SourceMapConsumer$1,
	SourceNode: SourceNode$1
};

const PURE_ANNOTATION = `/*#__PURE__*/`;
const aliasHelper = (s) => `${helperNameMap[s]}: _${helperNameMap[s]}`;
function createCodegenContext(ast, { mode = 'function', prefixIdentifiers = mode === 'module', sourceMap = false, filename = `template.vue.html`, scopeId = null, optimizeImports = false, runtimeGlobalName = `Vue`, runtimeModuleName = `vue`, ssrRuntimeModuleName = 'vue/server-renderer', ssr = false, isTS = false, inSSR = false }) {
    const context = {
        mode,
        prefixIdentifiers,
        sourceMap,
        filename,
        scopeId,
        optimizeImports,
        runtimeGlobalName,
        runtimeModuleName,
        ssrRuntimeModuleName,
        ssr,
        isTS,
        inSSR,
        source: ast.loc.source,
        code: ``,
        column: 1,
        line: 1,
        offset: 0,
        indentLevel: 0,
        pure: false,
        map: undefined,
        helper(key) {
            return `_${helperNameMap[key]}`;
        },
        push(code, node) {
            context.code += code;
            if (context.map) {
                if (node) {
                    let name;
                    if (node.type === 4 /* SIMPLE_EXPRESSION */ && !node.isStatic) {
                        const content = node.content.replace(/^_ctx\./, '');
                        if (content !== node.content && isSimpleIdentifier(content)) {
                            name = content;
                        }
                    }
                    addMapping(node.loc.start, name);
                }
                advancePositionWithMutation(context, code);
                if (node && node.loc !== locStub) {
                    addMapping(node.loc.end);
                }
            }
        },
        indent() {
            newline(++context.indentLevel);
        },
        deindent(withoutNewLine = false) {
            if (withoutNewLine) {
                --context.indentLevel;
            }
            else {
                newline(--context.indentLevel);
            }
        },
        newline() {
            newline(context.indentLevel);
        }
    };
    function newline(n) {
        context.push('\n' + `  `.repeat(n));
    }
    function addMapping(loc, name) {
        context.map.addMapping({
            name,
            source: context.filename,
            original: {
                line: loc.line,
                column: loc.column - 1 // source-map column is 0 based
            },
            generated: {
                line: context.line,
                column: context.column - 1
            }
        });
    }
    if (sourceMap) {
        // lazy require source-map implementation, only in non-browser builds
        context.map = new SourceMapGenerator$2();
        context.map.setSourceContent(filename, context.source);
    }
    return context;
}
function generate(ast, options = {}) {
    const context = createCodegenContext(ast, options);
    if (options.onContextCreated)
        options.onContextCreated(context);
    const { mode, push, prefixIdentifiers, indent, deindent, newline, scopeId, ssr } = context;
    const hasHelpers = ast.helpers.length > 0;
    const useWithBlock = !prefixIdentifiers && mode !== 'module';
    const genScopeId = scopeId != null && mode === 'module';
    const isSetupInlined = !!options.inline;
    // preambles
    // in setup() inline mode, the preamble is generated in a sub context
    // and returned separately.
    const preambleContext = isSetupInlined
        ? createCodegenContext(ast, options)
        : context;
    if (mode === 'module') {
        genModulePreamble(ast, preambleContext, genScopeId, isSetupInlined);
    }
    else {
        genFunctionPreamble(ast, preambleContext);
    }
    // enter render function
    const functionName = ssr ? `ssrRender` : `render`;
    const args = ssr ? ['_ctx', '_push', '_parent', '_attrs'] : ['_ctx', '_cache'];
    if (options.bindingMetadata && !options.inline) {
        // binding optimization args
        args.push('$props', '$setup', '$data', '$options');
    }
    const signature = options.isTS
        ? args.map(arg => `${arg}: any`).join(',')
        : args.join(', ');
    if (isSetupInlined) {
        push(`(${signature}) => {`);
    }
    else {
        push(`function ${functionName}(${signature}) {`);
    }
    indent();
    if (useWithBlock) {
        push(`with (_ctx) {`);
        indent();
        // function mode const declarations should be inside with block
        // also they should be renamed to avoid collision with user properties
        if (hasHelpers) {
            push(`const { ${ast.helpers.map(aliasHelper).join(', ')} } = _Vue`);
            push(`\n`);
            newline();
        }
    }
    // generate asset resolution statements
    if (ast.components.length) {
        genAssets(ast.components, 'component', context);
        if (ast.directives.length || ast.temps > 0) {
            newline();
        }
    }
    if (ast.directives.length) {
        genAssets(ast.directives, 'directive', context);
        if (ast.temps > 0) {
            newline();
        }
    }
    if (ast.temps > 0) {
        push(`let `);
        for (let i = 0; i < ast.temps; i++) {
            push(`${i > 0 ? `, ` : ``}_temp${i}`);
        }
    }
    if (ast.components.length || ast.directives.length || ast.temps) {
        push(`\n`);
        newline();
    }
    // generate the VNode tree expression
    if (!ssr) {
        push(`return `);
    }
    if (ast.codegenNode) {
        genNode(ast.codegenNode, context);
    }
    else {
        push(`null`);
    }
    if (useWithBlock) {
        deindent();
        push(`}`);
    }
    deindent();
    push(`}`);
    return {
        ast,
        code: context.code,
        preamble: isSetupInlined ? preambleContext.code : ``,
        // SourceMapGenerator does have toJSON() method but it's not in the types
        map: context.map ? context.map.toJSON() : undefined
    };
}
function genFunctionPreamble(ast, context) {
    const { ssr, prefixIdentifiers, push, newline, runtimeModuleName, runtimeGlobalName, ssrRuntimeModuleName } = context;
    const VueBinding = ssr
        ? `require(${JSON.stringify(runtimeModuleName)})`
        : runtimeGlobalName;
    // Generate const declaration for helpers
    // In prefix mode, we place the const declaration at top so it's done
    // only once; But if we not prefixing, we place the declaration inside the
    // with block so it doesn't incur the `in` check cost for every helper access.
    if (ast.helpers.length > 0) {
        if (prefixIdentifiers) {
            push(`const { ${ast.helpers.map(aliasHelper).join(', ')} } = ${VueBinding}\n`);
        }
        else {
            // "with" mode.
            // save Vue in a separate variable to avoid collision
            push(`const _Vue = ${VueBinding}\n`);
            // in "with" mode, helpers are declared inside the with block to avoid
            // has check cost, but hoists are lifted out of the function - we need
            // to provide the helper here.
            if (ast.hoists.length) {
                const staticHelpers = [
                    CREATE_VNODE,
                    CREATE_ELEMENT_VNODE,
                    CREATE_COMMENT,
                    CREATE_TEXT,
                    CREATE_STATIC
                ]
                    .filter(helper => ast.helpers.includes(helper))
                    .map(aliasHelper)
                    .join(', ');
                push(`const { ${staticHelpers} } = _Vue\n`);
            }
        }
    }
    // generate variables for ssr helpers
    if (ast.ssrHelpers && ast.ssrHelpers.length) {
        // ssr guarantees prefixIdentifier: true
        push(`const { ${ast.ssrHelpers
            .map(aliasHelper)
            .join(', ')} } = require("${ssrRuntimeModuleName}")\n`);
    }
    genHoists(ast.hoists, context);
    newline();
    push(`return `);
}
function genModulePreamble(ast, context, genScopeId, inline) {
    const { push, newline, optimizeImports, runtimeModuleName, ssrRuntimeModuleName } = context;
    if (genScopeId && ast.hoists.length) {
        ast.helpers.push(PUSH_SCOPE_ID, POP_SCOPE_ID);
    }
    // generate import statements for helpers
    if (ast.helpers.length) {
        if (optimizeImports) {
            // when bundled with webpack with code-split, calling an import binding
            // as a function leads to it being wrapped with `Object(a.b)` or `(0,a.b)`,
            // incurring both payload size increase and potential perf overhead.
            // therefore we assign the imports to variables (which is a constant ~50b
            // cost per-component instead of scaling with template size)
            push(`import { ${ast.helpers
                .map(s => helperNameMap[s])
                .join(', ')} } from ${JSON.stringify(runtimeModuleName)}\n`);
            push(`\n// Binding optimization for webpack code-split\nconst ${ast.helpers
                .map(s => `_${helperNameMap[s]} = ${helperNameMap[s]}`)
                .join(', ')}\n`);
        }
        else {
            push(`import { ${ast.helpers
                .map(s => `${helperNameMap[s]} as _${helperNameMap[s]}`)
                .join(', ')} } from ${JSON.stringify(runtimeModuleName)}\n`);
        }
    }
    if (ast.ssrHelpers && ast.ssrHelpers.length) {
        push(`import { ${ast.ssrHelpers
            .map(s => `${helperNameMap[s]} as _${helperNameMap[s]}`)
            .join(', ')} } from "${ssrRuntimeModuleName}"\n`);
    }
    if (ast.imports.length) {
        genImports(ast.imports, context);
        newline();
    }
    genHoists(ast.hoists, context);
    newline();
    if (!inline) {
        push(`export `);
    }
}
function genAssets(assets, type, { helper, push, newline, isTS }) {
    const resolver = helper(type === 'component'
            ? RESOLVE_COMPONENT
            : RESOLVE_DIRECTIVE);
    for (let i = 0; i < assets.length; i++) {
        let id = assets[i];
        // potential component implicit self-reference inferred from SFC filename
        const maybeSelfReference = id.endsWith('__self');
        if (maybeSelfReference) {
            id = id.slice(0, -6);
        }
        push(`const ${toValidAssetId(id, type)} = ${resolver}(${JSON.stringify(id)}${maybeSelfReference ? `, true` : ``})${isTS ? `!` : ``}`);
        if (i < assets.length - 1) {
            newline();
        }
    }
}
function genHoists(hoists, context) {
    if (!hoists.length) {
        return;
    }
    context.pure = true;
    const { push, newline, helper, scopeId, mode } = context;
    const genScopeId = scopeId != null && mode !== 'function';
    newline();
    // generate inlined withScopeId helper
    if (genScopeId) {
        push(`const _withScopeId = n => (${helper(PUSH_SCOPE_ID)}("${scopeId}"),n=n(),${helper(POP_SCOPE_ID)}(),n)`);
        newline();
    }
    for (let i = 0; i < hoists.length; i++) {
        const exp = hoists[i];
        if (exp) {
            const needScopeIdWrapper = genScopeId && exp.type === 13 /* VNODE_CALL */;
            push(`const _hoisted_${i + 1} = ${needScopeIdWrapper ? `${PURE_ANNOTATION} _withScopeId(() => ` : ``}`);
            genNode(exp, context);
            if (needScopeIdWrapper) {
                push(`)`);
            }
            newline();
        }
    }
    context.pure = false;
}
function genImports(importsOptions, context) {
    if (!importsOptions.length) {
        return;
    }
    importsOptions.forEach(imports => {
        context.push(`import `);
        genNode(imports.exp, context);
        context.push(` from '${imports.path}'`);
        context.newline();
    });
}
function isText$1(n) {
    return (isString(n) ||
        n.type === 4 /* SIMPLE_EXPRESSION */ ||
        n.type === 2 /* TEXT */ ||
        n.type === 5 /* INTERPOLATION */ ||
        n.type === 8 /* COMPOUND_EXPRESSION */);
}
function genNodeListAsArray(nodes, context) {
    const multilines = nodes.length > 3 ||
        (nodes.some(n => isArray(n) || !isText$1(n)));
    context.push(`[`);
    multilines && context.indent();
    genNodeList(nodes, context, multilines);
    multilines && context.deindent();
    context.push(`]`);
}
function genNodeList(nodes, context, multilines = false, comma = true) {
    const { push, newline } = context;
    for (let i = 0; i < nodes.length; i++) {
        const node = nodes[i];
        if (isString(node)) {
            push(node);
        }
        else if (isArray(node)) {
            genNodeListAsArray(node, context);
        }
        else {
            genNode(node, context);
        }
        if (i < nodes.length - 1) {
            if (multilines) {
                comma && push(',');
                newline();
            }
            else {
                comma && push(', ');
            }
        }
    }
}
function genNode(node, context) {
    if (isString(node)) {
        context.push(node);
        return;
    }
    if (isSymbol(node)) {
        context.push(context.helper(node));
        return;
    }
    switch (node.type) {
        case 1 /* ELEMENT */:
        case 9 /* IF */:
        case 11 /* FOR */:
            assert$1(node.codegenNode != null, `Codegen node is missing for element/if/for node. ` +
                    `Apply appropriate transforms first.`);
            genNode(node.codegenNode, context);
            break;
        case 2 /* TEXT */:
            genText(node, context);
            break;
        case 4 /* SIMPLE_EXPRESSION */:
            genExpression(node, context);
            break;
        case 5 /* INTERPOLATION */:
            genInterpolation(node, context);
            break;
        case 12 /* TEXT_CALL */:
            genNode(node.codegenNode, context);
            break;
        case 8 /* COMPOUND_EXPRESSION */:
            genCompoundExpression(node, context);
            break;
        case 3 /* COMMENT */:
            genComment(node, context);
            break;
        case 13 /* VNODE_CALL */:
            genVNodeCall(node, context);
            break;
        case 14 /* JS_CALL_EXPRESSION */:
            genCallExpression(node, context);
            break;
        case 15 /* JS_OBJECT_EXPRESSION */:
            genObjectExpression(node, context);
            break;
        case 17 /* JS_ARRAY_EXPRESSION */:
            genArrayExpression(node, context);
            break;
        case 18 /* JS_FUNCTION_EXPRESSION */:
            genFunctionExpression(node, context);
            break;
        case 19 /* JS_CONDITIONAL_EXPRESSION */:
            genConditionalExpression(node, context);
            break;
        case 20 /* JS_CACHE_EXPRESSION */:
            genCacheExpression(node, context);
            break;
        case 21 /* JS_BLOCK_STATEMENT */:
            genNodeList(node.body, context, true, false);
            break;
        // SSR only types
        case 22 /* JS_TEMPLATE_LITERAL */:
            genTemplateLiteral(node, context);
            break;
        case 23 /* JS_IF_STATEMENT */:
            genIfStatement(node, context);
            break;
        case 24 /* JS_ASSIGNMENT_EXPRESSION */:
            genAssignmentExpression(node, context);
            break;
        case 25 /* JS_SEQUENCE_EXPRESSION */:
            genSequenceExpression(node, context);
            break;
        case 26 /* JS_RETURN_STATEMENT */:
            genReturnStatement(node, context);
            break;
        /* istanbul ignore next */
        case 10 /* IF_BRANCH */:
            // noop
            break;
        default:
            {
                assert$1(false, `unhandled codegen node type: ${node.type}`);
                // make sure we exhaust all possible types
                const exhaustiveCheck = node;
                return exhaustiveCheck;
            }
    }
}
function genText(node, context) {
    context.push(JSON.stringify(node.content), node);
}
function genExpression(node, context) {
    const { content, isStatic } = node;
    context.push(isStatic ? JSON.stringify(content) : content, node);
}
function genInterpolation(node, context) {
    const { push, helper, pure } = context;
    if (pure)
        push(PURE_ANNOTATION);
    push(`${helper(TO_DISPLAY_STRING)}(`);
    genNode(node.content, context);
    push(`)`);
}
function genCompoundExpression(node, context) {
    for (let i = 0; i < node.children.length; i++) {
        const child = node.children[i];
        if (isString(child)) {
            context.push(child);
        }
        else {
            genNode(child, context);
        }
    }
}
function genExpressionAsPropertyKey(node, context) {
    const { push } = context;
    if (node.type === 8 /* COMPOUND_EXPRESSION */) {
        push(`[`);
        genCompoundExpression(node, context);
        push(`]`);
    }
    else if (node.isStatic) {
        // only quote keys if necessary
        const text = isSimpleIdentifier(node.content)
            ? node.content
            : JSON.stringify(node.content);
        push(text, node);
    }
    else {
        push(`[${node.content}]`, node);
    }
}
function genComment(node, context) {
    const { push, helper, pure } = context;
    if (pure) {
        push(PURE_ANNOTATION);
    }
    push(`${helper(CREATE_COMMENT)}(${JSON.stringify(node.content)})`, node);
}
function genVNodeCall(node, context) {
    const { push, helper, pure } = context;
    const { tag, props, children, patchFlag, dynamicProps, directives, isBlock, disableTracking, isComponent } = node;
    if (directives) {
        push(helper(WITH_DIRECTIVES) + `(`);
    }
    if (isBlock) {
        push(`(${helper(OPEN_BLOCK)}(${disableTracking ? `true` : ``}), `);
    }
    if (pure) {
        push(PURE_ANNOTATION);
    }
    const callHelper = isBlock
        ? getVNodeBlockHelper(context.inSSR, isComponent)
        : getVNodeHelper(context.inSSR, isComponent);
    push(helper(callHelper) + `(`, node);
    genNodeList(genNullableArgs([tag, props, children, patchFlag, dynamicProps]), context);
    push(`)`);
    if (isBlock) {
        push(`)`);
    }
    if (directives) {
        push(`, `);
        genNode(directives, context);
        push(`)`);
    }
}
function genNullableArgs(args) {
    let i = args.length;
    while (i--) {
        if (args[i] != null)
            break;
    }
    return args.slice(0, i + 1).map(arg => arg || `null`);
}
// JavaScript
function genCallExpression(node, context) {
    const { push, helper, pure } = context;
    const callee = isString(node.callee) ? node.callee : helper(node.callee);
    if (pure) {
        push(PURE_ANNOTATION);
    }
    push(callee + `(`, node);
    genNodeList(node.arguments, context);
    push(`)`);
}
function genObjectExpression(node, context) {
    const { push, indent, deindent, newline } = context;
    const { properties } = node;
    if (!properties.length) {
        push(`{}`, node);
        return;
    }
    const multilines = properties.length > 1 ||
        (properties.some(p => p.value.type !== 4 /* SIMPLE_EXPRESSION */));
    push(multilines ? `{` : `{ `);
    multilines && indent();
    for (let i = 0; i < properties.length; i++) {
        const { key, value } = properties[i];
        // key
        genExpressionAsPropertyKey(key, context);
        push(`: `);
        // value
        genNode(value, context);
        if (i < properties.length - 1) {
            // will only reach this if it's multilines
            push(`,`);
            newline();
        }
    }
    multilines && deindent();
    push(multilines ? `}` : ` }`);
}
function genArrayExpression(node, context) {
    genNodeListAsArray(node.elements, context);
}
function genFunctionExpression(node, context) {
    const { push, indent, deindent } = context;
    const { params, returns, body, newline, isSlot } = node;
    if (isSlot) {
        // wrap slot functions with owner context
        push(`_${helperNameMap[WITH_CTX]}(`);
    }
    push(`(`, node);
    if (isArray(params)) {
        genNodeList(params, context);
    }
    else if (params) {
        genNode(params, context);
    }
    push(`) => `);
    if (newline || body) {
        push(`{`);
        indent();
    }
    if (returns) {
        if (newline) {
            push(`return `);
        }
        if (isArray(returns)) {
            genNodeListAsArray(returns, context);
        }
        else {
            genNode(returns, context);
        }
    }
    else if (body) {
        genNode(body, context);
    }
    if (newline || body) {
        deindent();
        push(`}`);
    }
    if (isSlot) {
        push(`)`);
    }
}
function genConditionalExpression(node, context) {
    const { test, consequent, alternate, newline: needNewline } = node;
    const { push, indent, deindent, newline } = context;
    if (test.type === 4 /* SIMPLE_EXPRESSION */) {
        const needsParens = !isSimpleIdentifier(test.content);
        needsParens && push(`(`);
        genExpression(test, context);
        needsParens && push(`)`);
    }
    else {
        push(`(`);
        genNode(test, context);
        push(`)`);
    }
    needNewline && indent();
    context.indentLevel++;
    needNewline || push(` `);
    push(`? `);
    genNode(consequent, context);
    context.indentLevel--;
    needNewline && newline();
    needNewline || push(` `);
    push(`: `);
    const isNested = alternate.type === 19 /* JS_CONDITIONAL_EXPRESSION */;
    if (!isNested) {
        context.indentLevel++;
    }
    genNode(alternate, context);
    if (!isNested) {
        context.indentLevel--;
    }
    needNewline && deindent(true /* without newline */);
}
function genCacheExpression(node, context) {
    const { push, helper, indent, deindent, newline } = context;
    push(`_cache[${node.index}] || (`);
    if (node.isVNode) {
        indent();
        push(`${helper(SET_BLOCK_TRACKING)}(-1),`);
        newline();
    }
    push(`_cache[${node.index}] = `);
    genNode(node.value, context);
    if (node.isVNode) {
        push(`,`);
        newline();
        push(`${helper(SET_BLOCK_TRACKING)}(1),`);
        newline();
        push(`_cache[${node.index}]`);
        deindent();
    }
    push(`)`);
}
function genTemplateLiteral(node, context) {
    const { push, indent, deindent } = context;
    push('`');
    const l = node.elements.length;
    const multilines = l > 3;
    for (let i = 0; i < l; i++) {
        const e = node.elements[i];
        if (isString(e)) {
            push(e.replace(/(`|\$|\\)/g, '\\$1'));
        }
        else {
            push('${');
            if (multilines)
                indent();
            genNode(e, context);
            if (multilines)
                deindent();
            push('}');
        }
    }
    push('`');
}
function genIfStatement(node, context) {
    const { push, indent, deindent } = context;
    const { test, consequent, alternate } = node;
    push(`if (`);
    genNode(test, context);
    push(`) {`);
    indent();
    genNode(consequent, context);
    deindent();
    push(`}`);
    if (alternate) {
        push(` else `);
        if (alternate.type === 23 /* JS_IF_STATEMENT */) {
            genIfStatement(alternate, context);
        }
        else {
            push(`{`);
            indent();
            genNode(alternate, context);
            deindent();
            push(`}`);
        }
    }
}
function genAssignmentExpression(node, context) {
    genNode(node.left, context);
    context.push(` = `);
    genNode(node.right, context);
}
function genSequenceExpression(node, context) {
    context.push(`(`);
    genNodeList(node.expressions, context);
    context.push(`)`);
}
function genReturnStatement({ returns }, context) {
    context.push(`return `);
    if (isArray(returns)) {
        genNodeListAsArray(returns, context);
    }
    else {
        genNode(returns, context);
    }
}

// @ts-check
/** @typedef { import('estree').BaseNode} BaseNode */

/** @typedef {{
	skip: () => void;
	remove: () => void;
	replace: (node: BaseNode) => void;
}} WalkerContext */

class WalkerBase {
	constructor() {
		/** @type {boolean} */
		this.should_skip = false;

		/** @type {boolean} */
		this.should_remove = false;

		/** @type {BaseNode | null} */
		this.replacement = null;

		/** @type {WalkerContext} */
		this.context = {
			skip: () => (this.should_skip = true),
			remove: () => (this.should_remove = true),
			replace: (node) => (this.replacement = node)
		};
	}

	/**
	 *
	 * @param {any} parent
	 * @param {string} prop
	 * @param {number} index
	 * @param {BaseNode} node
	 */
	replace(parent, prop, index, node) {
		if (parent) {
			if (index !== null) {
				parent[prop][index] = node;
			} else {
				parent[prop] = node;
			}
		}
	}

	/**
	 *
	 * @param {any} parent
	 * @param {string} prop
	 * @param {number} index
	 */
	remove(parent, prop, index) {
		if (parent) {
			if (index !== null) {
				parent[prop].splice(index, 1);
			} else {
				delete parent[prop];
			}
		}
	}
}

// @ts-check

/** @typedef { import('estree').BaseNode} BaseNode */
/** @typedef { import('./walker.js').WalkerContext} WalkerContext */

/** @typedef {(
 *    this: WalkerContext,
 *    node: BaseNode,
 *    parent: BaseNode,
 *    key: string,
 *    index: number
 * ) => void} SyncHandler */

class SyncWalker extends WalkerBase {
	/**
	 *
	 * @param {SyncHandler} enter
	 * @param {SyncHandler} leave
	 */
	constructor(enter, leave) {
		super();

		/** @type {SyncHandler} */
		this.enter = enter;

		/** @type {SyncHandler} */
		this.leave = leave;
	}

	/**
	 *
	 * @param {BaseNode} node
	 * @param {BaseNode} parent
	 * @param {string} [prop]
	 * @param {number} [index]
	 * @returns {BaseNode}
	 */
	visit(node, parent, prop, index) {
		if (node) {
			if (this.enter) {
				const _should_skip = this.should_skip;
				const _should_remove = this.should_remove;
				const _replacement = this.replacement;
				this.should_skip = false;
				this.should_remove = false;
				this.replacement = null;

				this.enter.call(this.context, node, parent, prop, index);

				if (this.replacement) {
					node = this.replacement;
					this.replace(parent, prop, index, node);
				}

				if (this.should_remove) {
					this.remove(parent, prop, index);
				}

				const skipped = this.should_skip;
				const removed = this.should_remove;

				this.should_skip = _should_skip;
				this.should_remove = _should_remove;
				this.replacement = _replacement;

				if (skipped) return node;
				if (removed) return null;
			}

			for (const key in node) {
				const value = node[key];

				if (typeof value !== "object") {
					continue;
				} else if (Array.isArray(value)) {
					for (let i = 0; i < value.length; i += 1) {
						if (value[i] !== null && typeof value[i].type === 'string') {
							if (!this.visit(value[i], node, key, i)) {
								// removed
								i--;
							}
						}
					}
				} else if (value !== null && typeof value.type === "string") {
					this.visit(value, node, key, null);
				}
			}

			if (this.leave) {
				const _replacement = this.replacement;
				const _should_remove = this.should_remove;
				this.replacement = null;
				this.should_remove = false;

				this.leave.call(this.context, node, parent, prop, index);

				if (this.replacement) {
					node = this.replacement;
					this.replace(parent, prop, index, node);
				}

				if (this.should_remove) {
					this.remove(parent, prop, index);
				}

				const removed = this.should_remove;

				this.replacement = _replacement;
				this.should_remove = _should_remove;

				if (removed) return null;
			}
		}

		return node;
	}
}

// @ts-check

/** @typedef { import('estree').BaseNode} BaseNode */
/** @typedef { import('./sync.js').SyncHandler} SyncHandler */
/** @typedef { import('./async.js').AsyncHandler} AsyncHandler */

/**
 *
 * @param {BaseNode} ast
 * @param {{
 *   enter?: SyncHandler
 *   leave?: SyncHandler
 * }} walker
 * @returns {BaseNode}
 */
function walk$1(ast, { enter, leave }) {
	const instance = new SyncWalker(enter, leave);
	return instance.visit(ast, null);
}

function walkIdentifiers(root, onIdentifier, includeAll = false, parentStack = [], knownIds = Object.create(null)) {
    const rootExp = root.type === 'Program' &&
        root.body[0].type === 'ExpressionStatement' &&
        root.body[0].expression;
    walk$1(root, {
        enter(node, parent) {
            parent && parentStack.push(parent);
            if (parent &&
                parent.type.startsWith('TS') &&
                parent.type !== 'TSAsExpression' &&
                parent.type !== 'TSNonNullExpression' &&
                parent.type !== 'TSTypeAssertion') {
                return this.skip();
            }
            if (node.type === 'Identifier') {
                const isLocal = !!knownIds[node.name];
                const isRefed = isReferencedIdentifier(node, parent, parentStack);
                if (includeAll || (isRefed && !isLocal)) {
                    onIdentifier(node, parent, parentStack, isRefed, isLocal);
                }
            }
            else if (node.type === 'ObjectProperty' &&
                parent.type === 'ObjectPattern') {
                node.inPattern = true;
            }
            else if (isFunctionType(node)) {
                // walk function expressions and add its arguments to known identifiers
                // so that we don't prefix them
                walkFunctionParams(node, id => markScopeIdentifier(node, id, knownIds));
            }
            else if (node.type === 'BlockStatement') {
                // #3445 record block-level local variables
                walkBlockDeclarations(node, id => markScopeIdentifier(node, id, knownIds));
            }
        },
        leave(node, parent) {
            parent && parentStack.pop();
            if (node !== rootExp && node.scopeIds) {
                for (const id of node.scopeIds) {
                    knownIds[id]--;
                    if (knownIds[id] === 0) {
                        delete knownIds[id];
                    }
                }
            }
        }
    });
}
function isReferencedIdentifier(id, parent, parentStack) {
    if (!parent) {
        return true;
    }
    // is a special keyword but parsed as identifier
    if (id.name === 'arguments') {
        return false;
    }
    if (isReferenced(id, parent)) {
        return true;
    }
    // babel's isReferenced check returns false for ids being assigned to, so we
    // need to cover those cases here
    switch (parent.type) {
        case 'AssignmentExpression':
        case 'AssignmentPattern':
            return true;
        case 'ObjectPattern':
        case 'ArrayPattern':
            return isInDestructureAssignment(parent, parentStack);
    }
    return false;
}
function isInDestructureAssignment(parent, parentStack) {
    if (parent &&
        (parent.type === 'ObjectProperty' || parent.type === 'ArrayPattern')) {
        let i = parentStack.length;
        while (i--) {
            const p = parentStack[i];
            if (p.type === 'AssignmentExpression') {
                return true;
            }
            else if (p.type !== 'ObjectProperty' && !p.type.endsWith('Pattern')) {
                break;
            }
        }
    }
    return false;
}
function walkFunctionParams(node, onIdent) {
    for (const p of node.params) {
        for (const id of extractIdentifiers(p)) {
            onIdent(id);
        }
    }
}
function walkBlockDeclarations(block, onIdent) {
    for (const stmt of block.body) {
        if (stmt.type === 'VariableDeclaration') {
            if (stmt.declare)
                continue;
            for (const decl of stmt.declarations) {
                for (const id of extractIdentifiers(decl.id)) {
                    onIdent(id);
                }
            }
        }
        else if (stmt.type === 'FunctionDeclaration' ||
            stmt.type === 'ClassDeclaration') {
            if (stmt.declare || !stmt.id)
                continue;
            onIdent(stmt.id);
        }
    }
}
function extractIdentifiers(param, nodes = []) {
    switch (param.type) {
        case 'Identifier':
            nodes.push(param);
            break;
        case 'MemberExpression':
            let object = param;
            while (object.type === 'MemberExpression') {
                object = object.object;
            }
            nodes.push(object);
            break;
        case 'ObjectPattern':
            for (const prop of param.properties) {
                if (prop.type === 'RestElement') {
                    extractIdentifiers(prop.argument, nodes);
                }
                else {
                    extractIdentifiers(prop.value, nodes);
                }
            }
            break;
        case 'ArrayPattern':
            param.elements.forEach(element => {
                if (element)
                    extractIdentifiers(element, nodes);
            });
            break;
        case 'RestElement':
            extractIdentifiers(param.argument, nodes);
            break;
        case 'AssignmentPattern':
            extractIdentifiers(param.left, nodes);
            break;
    }
    return nodes;
}
function markScopeIdentifier(node, child, knownIds) {
    const { name } = child;
    if (node.scopeIds && node.scopeIds.has(name)) {
        return;
    }
    if (name in knownIds) {
        knownIds[name]++;
    }
    else {
        knownIds[name] = 1;
    }
    (node.scopeIds || (node.scopeIds = new Set())).add(name);
}
const isFunctionType = (node) => {
    return /Function(?:Expression|Declaration)$|Method$/.test(node.type);
};
const isStaticProperty = (node) => node &&
    (node.type === 'ObjectProperty' || node.type === 'ObjectMethod') &&
    !node.computed;
const isStaticPropertyKey = (node, parent) => isStaticProperty(parent) && parent.key === node;
/**
 * Copied from https://github.com/babel/babel/blob/main/packages/babel-types/src/validators/isReferenced.ts
 * To avoid runtime dependency on @babel/types (which includes process references)
 * This file should not change very often in babel but we may need to keep it
 * up-to-date from time to time.
 *
 * https://github.com/babel/babel/blob/main/LICENSE
 *
 */
function isReferenced(node, parent, grandparent) {
    switch (parent.type) {
        // yes: PARENT[NODE]
        // yes: NODE.child
        // no: parent.NODE
        case 'MemberExpression':
        case 'OptionalMemberExpression':
            if (parent.property === node) {
                return !!parent.computed;
            }
            return parent.object === node;
        case 'JSXMemberExpression':
            return parent.object === node;
        // no: let NODE = init;
        // yes: let id = NODE;
        case 'VariableDeclarator':
            return parent.init === node;
        // yes: () => NODE
        // no: (NODE) => {}
        case 'ArrowFunctionExpression':
            return parent.body === node;
        // no: class { #NODE; }
        // no: class { get #NODE() {} }
        // no: class { #NODE() {} }
        // no: class { fn() { return this.#NODE; } }
        case 'PrivateName':
            return false;
        // no: class { NODE() {} }
        // yes: class { [NODE]() {} }
        // no: class { foo(NODE) {} }
        case 'ClassMethod':
        case 'ClassPrivateMethod':
        case 'ObjectMethod':
            if (parent.key === node) {
                return !!parent.computed;
            }
            return false;
        // yes: { [NODE]: "" }
        // no: { NODE: "" }
        // depends: { NODE }
        // depends: { key: NODE }
        case 'ObjectProperty':
            if (parent.key === node) {
                return !!parent.computed;
            }
            // parent.value === node
            return !grandparent || grandparent.type !== 'ObjectPattern';
        // no: class { NODE = value; }
        // yes: class { [NODE] = value; }
        // yes: class { key = NODE; }
        case 'ClassProperty':
            if (parent.key === node) {
                return !!parent.computed;
            }
            return true;
        case 'ClassPrivateProperty':
            return parent.key !== node;
        // no: class NODE {}
        // yes: class Foo extends NODE {}
        case 'ClassDeclaration':
        case 'ClassExpression':
            return parent.superClass === node;
        // yes: left = NODE;
        // no: NODE = right;
        case 'AssignmentExpression':
            return parent.right === node;
        // no: [NODE = foo] = [];
        // yes: [foo = NODE] = [];
        case 'AssignmentPattern':
            return parent.right === node;
        // no: NODE: for (;;) {}
        case 'LabeledStatement':
            return false;
        // no: try {} catch (NODE) {}
        case 'CatchClause':
            return false;
        // no: function foo(...NODE) {}
        case 'RestElement':
            return false;
        case 'BreakStatement':
        case 'ContinueStatement':
            return false;
        // no: function NODE() {}
        // no: function foo(NODE) {}
        case 'FunctionDeclaration':
        case 'FunctionExpression':
            return false;
        // no: export NODE from "foo";
        // no: export * as NODE from "foo";
        case 'ExportNamespaceSpecifier':
        case 'ExportDefaultSpecifier':
            return false;
        // no: export { foo as NODE };
        // yes: export { NODE as foo };
        // no: export { NODE as foo } from "foo";
        case 'ExportSpecifier':
            // @ts-expect-error
            if (grandparent === null || grandparent === void 0 ? void 0 : grandparent.source) {
                return false;
            }
            return parent.local === node;
        // no: import NODE from "foo";
        // no: import * as NODE from "foo";
        // no: import { NODE as foo } from "foo";
        // no: import { foo as NODE } from "foo";
        // no: import NODE from "bar";
        case 'ImportDefaultSpecifier':
        case 'ImportNamespaceSpecifier':
        case 'ImportSpecifier':
            return false;
        // no: import "foo" assert { NODE: "json" }
        case 'ImportAttribute':
            return false;
        // no: <div NODE="foo" />
        case 'JSXAttribute':
            return false;
        // no: [NODE] = [];
        // no: ({ NODE }) = [];
        case 'ObjectPattern':
        case 'ArrayPattern':
            return false;
        // no: new.NODE
        // no: NODE.target
        case 'MetaProperty':
            return false;
        // yes: type X = { someProperty: NODE }
        // no: type X = { NODE: OtherType }
        case 'ObjectTypeProperty':
            return parent.key !== node;
        // yes: enum X { Foo = NODE }
        // no: enum X { NODE }
        case 'TSEnumMember':
            return parent.id !== node;
        // yes: { [NODE]: value }
        // no: { NODE: value }
        case 'TSPropertySignature':
            if (parent.key === node) {
                return !!parent.computed;
            }
            return true;
    }
    return true;
}

const isLiteralWhitelisted = /*#__PURE__*/ makeMap('true,false,null,this');
const transformExpression = (node, context) => {
    if (node.type === 5 /* INTERPOLATION */) {
        node.content = processExpression(node.content, context);
    }
    else if (node.type === 1 /* ELEMENT */) {
        // handle directives on element
        for (let i = 0; i < node.props.length; i++) {
            const dir = node.props[i];
            // do not process for v-on & v-for since they are special handled
            if (dir.type === 7 /* DIRECTIVE */ && dir.name !== 'for') {
                const exp = dir.exp;
                const arg = dir.arg;
                // do not process exp if this is v-on:arg - we need special handling
                // for wrapping inline statements.
                if (exp &&
                    exp.type === 4 /* SIMPLE_EXPRESSION */ &&
                    !(dir.name === 'on' && arg)) {
                    dir.exp = processExpression(exp, context, 
                    // slot args must be processed as function params
                    dir.name === 'slot');
                }
                if (arg && arg.type === 4 /* SIMPLE_EXPRESSION */ && !arg.isStatic) {
                    dir.arg = processExpression(arg, context);
                }
            }
        }
    }
};
// Important: since this function uses Node.js only dependencies, it should
// always be used with a leading !false check so that it can be
// tree-shaken from the browser build.
function processExpression(node, context, 
// some expressions like v-slot props & v-for aliases should be parsed as
// function params
asParams = false, 
// v-on handler values may contain multiple statements
asRawStatements = false, localVars = Object.create(context.identifiers)) {
    if (!context.prefixIdentifiers || !node.content.trim()) {
        return node;
    }
    const { inline, bindingMetadata } = context;
    const rewriteIdentifier = (raw, parent, id) => {
        const type = hasOwn(bindingMetadata, raw) && bindingMetadata[raw];
        if (inline) {
            // x = y
            const isAssignmentLVal = parent && parent.type === 'AssignmentExpression' && parent.left === id;
            // x++
            const isUpdateArg = parent && parent.type === 'UpdateExpression' && parent.argument === id;
            // ({ x } = y)
            const isDestructureAssignment = parent && isInDestructureAssignment(parent, parentStack);
            if (type === "setup-const" /* SETUP_CONST */ ||
                type === "setup-reactive-const" /* SETUP_REACTIVE_CONST */ ||
                localVars[raw]) {
                return raw;
            }
            else if (type === "setup-ref" /* SETUP_REF */) {
                return `${raw}.value`;
            }
            else if (type === "setup-maybe-ref" /* SETUP_MAYBE_REF */) {
                // const binding that may or may not be ref
                // if it's not a ref, then assignments don't make sense -
                // so we ignore the non-ref assignment case and generate code
                // that assumes the value to be a ref for more efficiency
                return isAssignmentLVal || isUpdateArg || isDestructureAssignment
                    ? `${raw}.value`
                    : `${context.helperString(UNREF)}(${raw})`;
            }
            else if (type === "setup-let" /* SETUP_LET */) {
                if (isAssignmentLVal) {
                    // let binding.
                    // this is a bit more tricky as we need to cover the case where
                    // let is a local non-ref value, and we need to replicate the
                    // right hand side value.
                    // x = y --> isRef(x) ? x.value = y : x = y
                    const { right: rVal, operator } = parent;
                    const rExp = rawExp.slice(rVal.start - 1, rVal.end - 1);
                    const rExpString = stringifyExpression(processExpression(createSimpleExpression(rExp, false), context, false, false, knownIds));
                    return `${context.helperString(IS_REF)}(${raw})${context.isTS ? ` //@ts-ignore\n` : ``} ? ${raw}.value ${operator} ${rExpString} : ${raw}`;
                }
                else if (isUpdateArg) {
                    // make id replace parent in the code range so the raw update operator
                    // is removed
                    id.start = parent.start;
                    id.end = parent.end;
                    const { prefix: isPrefix, operator } = parent;
                    const prefix = isPrefix ? operator : ``;
                    const postfix = isPrefix ? `` : operator;
                    // let binding.
                    // x++ --> isRef(a) ? a.value++ : a++
                    return `${context.helperString(IS_REF)}(${raw})${context.isTS ? ` //@ts-ignore\n` : ``} ? ${prefix}${raw}.value${postfix} : ${prefix}${raw}${postfix}`;
                }
                else if (isDestructureAssignment) {
                    // TODO
                    // let binding in a destructure assignment - it's very tricky to
                    // handle both possible cases here without altering the original
                    // structure of the code, so we just assume it's not a ref here
                    // for now
                    return raw;
                }
                else {
                    return `${context.helperString(UNREF)}(${raw})`;
                }
            }
            else if (type === "props" /* PROPS */) {
                // use __props which is generated by compileScript so in ts mode
                // it gets correct type
                return genPropsAccessExp(raw);
            }
            else if (type === "props-aliased" /* PROPS_ALIASED */) {
                // prop with a different local alias (from defineProps() destructure)
                return genPropsAccessExp(bindingMetadata.__propsAliases[raw]);
            }
        }
        else {
            if (type && type.startsWith('setup')) {
                // setup bindings in non-inline mode
                return `$setup.${raw}`;
            }
            else if (type === "props-aliased" /* PROPS_ALIASED */) {
                return `$props['${bindingMetadata.__propsAliases[raw]}']`;
            }
            else if (type) {
                return `$${type}.${raw}`;
            }
        }
        // fallback to ctx
        return `_ctx.${raw}`;
    };
    // fast path if expression is a simple identifier.
    const rawExp = node.content;
    // bail constant on parens (function invocation) and dot (member access)
    const bailConstant = rawExp.indexOf(`(`) > -1 || rawExp.indexOf('.') > 0;
    if (isSimpleIdentifier(rawExp)) {
        const isScopeVarReference = context.identifiers[rawExp];
        const isAllowedGlobal = isGloballyWhitelisted(rawExp);
        const isLiteral = isLiteralWhitelisted(rawExp);
        if (!asParams && !isScopeVarReference && !isAllowedGlobal && !isLiteral) {
            // const bindings exposed from setup can be skipped for patching but
            // cannot be hoisted to module scope
            if (bindingMetadata[node.content] === "setup-const" /* SETUP_CONST */) {
                node.constType = 1 /* CAN_SKIP_PATCH */;
            }
            node.content = rewriteIdentifier(rawExp);
        }
        else if (!isScopeVarReference) {
            if (isLiteral) {
                node.constType = 3 /* CAN_STRINGIFY */;
            }
            else {
                node.constType = 2 /* CAN_HOIST */;
            }
        }
        return node;
    }
    let ast;
    // exp needs to be parsed differently:
    // 1. Multiple inline statements (v-on, with presence of `;`): parse as raw
    //    exp, but make sure to pad with spaces for consistent ranges
    // 2. Expressions: wrap with parens (for e.g. object expressions)
    // 3. Function arguments (v-for, v-slot): place in a function argument position
    const source = asRawStatements
        ? ` ${rawExp} `
        : `(${rawExp})${asParams ? `=>{}` : ``}`;
    try {
        ast = parse_1(source, {
            plugins: context.expressionPlugins
        }).program;
    }
    catch (e) {
        context.onError(createCompilerError(44 /* X_INVALID_EXPRESSION */, node.loc, undefined, e.message));
        return node;
    }
    const ids = [];
    const parentStack = [];
    const knownIds = Object.create(context.identifiers);
    walkIdentifiers(ast, (node, parent, _, isReferenced, isLocal) => {
        if (isStaticPropertyKey(node, parent)) {
            return;
        }
        const needPrefix = isReferenced && canPrefix(node);
        if (needPrefix && !isLocal) {
            if (isStaticProperty(parent) && parent.shorthand) {
                node.prefix = `${node.name}: `;
            }
            node.name = rewriteIdentifier(node.name, parent, node);
            ids.push(node);
        }
        else {
            // The identifier is considered constant unless it's pointing to a
            // local scope variable (a v-for alias, or a v-slot prop)
            if (!(needPrefix && isLocal) && !bailConstant) {
                node.isConstant = true;
            }
            // also generate sub-expressions for other identifiers for better
            // source map support. (except for property keys which are static)
            ids.push(node);
        }
    }, true, // invoke on ALL identifiers
    parentStack, knownIds);
    // We break up the compound expression into an array of strings and sub
    // expressions (for identifiers that have been prefixed). In codegen, if
    // an ExpressionNode has the `.children` property, it will be used instead of
    // `.content`.
    const children = [];
    ids.sort((a, b) => a.start - b.start);
    ids.forEach((id, i) => {
        // range is offset by -1 due to the wrapping parens when parsed
        const start = id.start - 1;
        const end = id.end - 1;
        const last = ids[i - 1];
        const leadingText = rawExp.slice(last ? last.end - 1 : 0, start);
        if (leadingText.length || id.prefix) {
            children.push(leadingText + (id.prefix || ``));
        }
        const source = rawExp.slice(start, end);
        children.push(createSimpleExpression(id.name, false, {
            source,
            start: advancePositionWithClone(node.loc.start, source, start),
            end: advancePositionWithClone(node.loc.start, source, end)
        }, id.isConstant ? 3 /* CAN_STRINGIFY */ : 0 /* NOT_CONSTANT */));
        if (i === ids.length - 1 && end < rawExp.length) {
            children.push(rawExp.slice(end));
        }
    });
    let ret;
    if (children.length) {
        ret = createCompoundExpression(children, node.loc);
    }
    else {
        ret = node;
        ret.constType = bailConstant
            ? 0 /* NOT_CONSTANT */
            : 3 /* CAN_STRINGIFY */;
    }
    ret.identifiers = Object.keys(knownIds);
    return ret;
}
function canPrefix(id) {
    // skip whitelisted globals
    if (isGloballyWhitelisted(id.name)) {
        return false;
    }
    // special case for webpack compilation
    if (id.name === 'require') {
        return false;
    }
    return true;
}
function stringifyExpression(exp) {
    if (isString(exp)) {
        return exp;
    }
    else if (exp.type === 4 /* SIMPLE_EXPRESSION */) {
        return exp.content;
    }
    else {
        return exp.children
            .map(stringifyExpression)
            .join('');
    }
}

const transformIf = createStructuralDirectiveTransform(/^(if|else|else-if)$/, (node, dir, context) => {
    return processIf(node, dir, context, (ifNode, branch, isRoot) => {
        // #1587: We need to dynamically increment the key based on the current
        // node's sibling nodes, since chained v-if/else branches are
        // rendered at the same depth
        const siblings = context.parent.children;
        let i = siblings.indexOf(ifNode);
        let key = 0;
        while (i-- >= 0) {
            const sibling = siblings[i];
            if (sibling && sibling.type === 9 /* IF */) {
                key += sibling.branches.length;
            }
        }
        // Exit callback. Complete the codegenNode when all children have been
        // transformed.
        return () => {
            if (isRoot) {
                ifNode.codegenNode = createCodegenNodeForBranch(branch, key, context);
            }
            else {
                // attach this branch's codegen node to the v-if root.
                const parentCondition = getParentCondition(ifNode.codegenNode);
                parentCondition.alternate = createCodegenNodeForBranch(branch, key + ifNode.branches.length - 1, context);
            }
        };
    });
});
// target-agnostic transform used for both Client and SSR
function processIf(node, dir, context, processCodegen) {
    if (dir.name !== 'else' &&
        (!dir.exp || !dir.exp.content.trim())) {
        const loc = dir.exp ? dir.exp.loc : node.loc;
        context.onError(createCompilerError(28 /* X_V_IF_NO_EXPRESSION */, dir.loc));
        dir.exp = createSimpleExpression(`true`, false, loc);
    }
    if (context.prefixIdentifiers && dir.exp) {
        // dir.exp can only be simple expression because vIf transform is applied
        // before expression transform.
        dir.exp = processExpression(dir.exp, context);
    }
    if (dir.name === 'if') {
        const branch = createIfBranch(node, dir);
        const ifNode = {
            type: 9 /* IF */,
            loc: node.loc,
            branches: [branch]
        };
        context.replaceNode(ifNode);
        if (processCodegen) {
            return processCodegen(ifNode, branch, true);
        }
    }
    else {
        // locate the adjacent v-if
        const siblings = context.parent.children;
        const comments = [];
        let i = siblings.indexOf(node);
        while (i-- >= -1) {
            const sibling = siblings[i];
            if (sibling && sibling.type === 3 /* COMMENT */) {
                context.removeNode(sibling);
                comments.unshift(sibling);
                continue;
            }
            if (sibling &&
                sibling.type === 2 /* TEXT */ &&
                !sibling.content.trim().length) {
                context.removeNode(sibling);
                continue;
            }
            if (sibling && sibling.type === 9 /* IF */) {
                // Check if v-else was followed by v-else-if
                if (dir.name === 'else-if' &&
                    sibling.branches[sibling.branches.length - 1].condition === undefined) {
                    context.onError(createCompilerError(30 /* X_V_ELSE_NO_ADJACENT_IF */, node.loc));
                }
                // move the node to the if node's branches
                context.removeNode();
                const branch = createIfBranch(node, dir);
                if (comments.length &&
                    // #3619 ignore comments if the v-if is direct child of <transition>
                    !(context.parent &&
                        context.parent.type === 1 /* ELEMENT */ &&
                        isBuiltInType(context.parent.tag, 'transition'))) {
                    branch.children = [...comments, ...branch.children];
                }
                // check if user is forcing same key on different branches
                {
                    const key = branch.userKey;
                    if (key) {
                        sibling.branches.forEach(({ userKey }) => {
                            if (isSameKey(userKey, key)) {
                                context.onError(createCompilerError(29 /* X_V_IF_SAME_KEY */, branch.userKey.loc));
                            }
                        });
                    }
                }
                sibling.branches.push(branch);
                const onExit = processCodegen && processCodegen(sibling, branch, false);
                // since the branch was removed, it will not be traversed.
                // make sure to traverse here.
                traverseNode(branch, context);
                // call on exit
                if (onExit)
                    onExit();
                // make sure to reset currentNode after traversal to indicate this
                // node has been removed.
                context.currentNode = null;
            }
            else {
                context.onError(createCompilerError(30 /* X_V_ELSE_NO_ADJACENT_IF */, node.loc));
            }
            break;
        }
    }
}
function createIfBranch(node, dir) {
    const isTemplateIf = node.tagType === 3 /* TEMPLATE */;
    return {
        type: 10 /* IF_BRANCH */,
        loc: node.loc,
        condition: dir.name === 'else' ? undefined : dir.exp,
        children: isTemplateIf && !findDir(node, 'for') ? node.children : [node],
        userKey: findProp(node, `key`),
        isTemplateIf
    };
}
function createCodegenNodeForBranch(branch, keyIndex, context) {
    if (branch.condition) {
        return createConditionalExpression(branch.condition, createChildrenCodegenNode(branch, keyIndex, context), 
        // make sure to pass in asBlock: true so that the comment node call
        // closes the current block.
        createCallExpression(context.helper(CREATE_COMMENT), [
            '"v-if"' ,
            'true'
        ]));
    }
    else {
        return createChildrenCodegenNode(branch, keyIndex, context);
    }
}
function createChildrenCodegenNode(branch, keyIndex, context) {
    const { helper } = context;
    const keyProperty = createObjectProperty(`key`, createSimpleExpression(`${keyIndex}`, false, locStub, 2 /* CAN_HOIST */));
    const { children } = branch;
    const firstChild = children[0];
    const needFragmentWrapper = children.length !== 1 || firstChild.type !== 1 /* ELEMENT */;
    if (needFragmentWrapper) {
        if (children.length === 1 && firstChild.type === 11 /* FOR */) {
            // optimize away nested fragments when child is a ForNode
            const vnodeCall = firstChild.codegenNode;
            injectProp(vnodeCall, keyProperty, context);
            return vnodeCall;
        }
        else {
            let patchFlag = 64 /* STABLE_FRAGMENT */;
            let patchFlagText = PatchFlagNames[64 /* STABLE_FRAGMENT */];
            // check if the fragment actually contains a single valid child with
            // the rest being comments
            if (!branch.isTemplateIf &&
                children.filter(c => c.type !== 3 /* COMMENT */).length === 1) {
                patchFlag |= 2048 /* DEV_ROOT_FRAGMENT */;
                patchFlagText += `, ${PatchFlagNames[2048 /* DEV_ROOT_FRAGMENT */]}`;
            }
            return createVNodeCall(context, helper(FRAGMENT), createObjectExpression([keyProperty]), children, patchFlag + (` /* ${patchFlagText} */` ), undefined, undefined, true, false, false /* isComponent */, branch.loc);
        }
    }
    else {
        const ret = firstChild.codegenNode;
        const vnodeCall = getMemoedVNodeCall(ret);
        // Change createVNode to createBlock.
        if (vnodeCall.type === 13 /* VNODE_CALL */) {
            makeBlock(vnodeCall, context);
        }
        // inject branch key
        injectProp(vnodeCall, keyProperty, context);
        return ret;
    }
}
function isSameKey(a, b) {
    if (!a || a.type !== b.type) {
        return false;
    }
    if (a.type === 6 /* ATTRIBUTE */) {
        if (a.value.content !== b.value.content) {
            return false;
        }
    }
    else {
        // directive
        const exp = a.exp;
        const branchExp = b.exp;
        if (exp.type !== branchExp.type) {
            return false;
        }
        if (exp.type !== 4 /* SIMPLE_EXPRESSION */ ||
            exp.isStatic !== branchExp.isStatic ||
            exp.content !== branchExp.content) {
            return false;
        }
    }
    return true;
}
function getParentCondition(node) {
    while (true) {
        if (node.type === 19 /* JS_CONDITIONAL_EXPRESSION */) {
            if (node.alternate.type === 19 /* JS_CONDITIONAL_EXPRESSION */) {
                node = node.alternate;
            }
            else {
                return node;
            }
        }
        else if (node.type === 20 /* JS_CACHE_EXPRESSION */) {
            node = node.value;
        }
    }
}

const transformFor = createStructuralDirectiveTransform('for', (node, dir, context) => {
    const { helper, removeHelper } = context;
    return processFor(node, dir, context, forNode => {
        // create the loop render function expression now, and add the
        // iterator on exit after all children have been traversed
        const renderExp = createCallExpression(helper(RENDER_LIST), [
            forNode.source
        ]);
        const isTemplate = isTemplateNode(node);
        const memo = findDir(node, 'memo');
        const keyProp = findProp(node, `key`);
        const keyExp = keyProp &&
            (keyProp.type === 6 /* ATTRIBUTE */
                ? createSimpleExpression(keyProp.value.content, true)
                : keyProp.exp);
        const keyProperty = keyProp ? createObjectProperty(`key`, keyExp) : null;
        if (isTemplate) {
            // #2085 / #5288 process :key and v-memo expressions need to be
            // processed on `<template v-for>`. In this case the node is discarded
            // and never traversed so its binding expressions won't be processed
            // by the normal transforms.
            if (memo) {
                memo.exp = processExpression(memo.exp, context);
            }
            if (keyProperty && keyProp.type !== 6 /* ATTRIBUTE */) {
                keyProperty.value = processExpression(keyProperty.value, context);
            }
        }
        const isStableFragment = forNode.source.type === 4 /* SIMPLE_EXPRESSION */ &&
            forNode.source.constType > 0 /* NOT_CONSTANT */;
        const fragmentFlag = isStableFragment
            ? 64 /* STABLE_FRAGMENT */
            : keyProp
                ? 128 /* KEYED_FRAGMENT */
                : 256 /* UNKEYED_FRAGMENT */;
        forNode.codegenNode = createVNodeCall(context, helper(FRAGMENT), undefined, renderExp, fragmentFlag +
            (` /* ${PatchFlagNames[fragmentFlag]} */` ), undefined, undefined, true /* isBlock */, !isStableFragment /* disableTracking */, false /* isComponent */, node.loc);
        return () => {
            // finish the codegen now that all children have been traversed
            let childBlock;
            const { children } = forNode;
            // check <template v-for> key placement
            if (isTemplate) {
                node.children.some(c => {
                    if (c.type === 1 /* ELEMENT */) {
                        const key = findProp(c, 'key');
                        if (key) {
                            context.onError(createCompilerError(33 /* X_V_FOR_TEMPLATE_KEY_PLACEMENT */, key.loc));
                            return true;
                        }
                    }
                });
            }
            const needFragmentWrapper = children.length !== 1 || children[0].type !== 1 /* ELEMENT */;
            const slotOutlet = isSlotOutlet(node)
                ? node
                : isTemplate &&
                    node.children.length === 1 &&
                    isSlotOutlet(node.children[0])
                    ? node.children[0] // api-extractor somehow fails to infer this
                    : null;
            if (slotOutlet) {
                // <slot v-for="..."> or <template v-for="..."><slot/></template>
                childBlock = slotOutlet.codegenNode;
                if (isTemplate && keyProperty) {
                    // <template v-for="..." :key="..."><slot/></template>
                    // we need to inject the key to the renderSlot() call.
                    // the props for renderSlot is passed as the 3rd argument.
                    injectProp(childBlock, keyProperty, context);
                }
            }
            else if (needFragmentWrapper) {
                // <template v-for="..."> with text or multi-elements
                // should generate a fragment block for each loop
                childBlock = createVNodeCall(context, helper(FRAGMENT), keyProperty ? createObjectExpression([keyProperty]) : undefined, node.children, 64 /* STABLE_FRAGMENT */ +
                    (` /* ${PatchFlagNames[64 /* STABLE_FRAGMENT */]} */`
                        ), undefined, undefined, true, undefined, false /* isComponent */);
            }
            else {
                // Normal element v-for. Directly use the child's codegenNode
                // but mark it as a block.
                childBlock = children[0]
                    .codegenNode;
                if (isTemplate && keyProperty) {
                    injectProp(childBlock, keyProperty, context);
                }
                if (childBlock.isBlock !== !isStableFragment) {
                    if (childBlock.isBlock) {
                        // switch from block to vnode
                        removeHelper(OPEN_BLOCK);
                        removeHelper(getVNodeBlockHelper(context.inSSR, childBlock.isComponent));
                    }
                    else {
                        // switch from vnode to block
                        removeHelper(getVNodeHelper(context.inSSR, childBlock.isComponent));
                    }
                }
                childBlock.isBlock = !isStableFragment;
                if (childBlock.isBlock) {
                    helper(OPEN_BLOCK);
                    helper(getVNodeBlockHelper(context.inSSR, childBlock.isComponent));
                }
                else {
                    helper(getVNodeHelper(context.inSSR, childBlock.isComponent));
                }
            }
            if (memo) {
                const loop = createFunctionExpression(createForLoopParams(forNode.parseResult, [
                    createSimpleExpression(`_cached`)
                ]));
                loop.body = createBlockStatement([
                    createCompoundExpression([`const _memo = (`, memo.exp, `)`]),
                    createCompoundExpression([
                        `if (_cached`,
                        ...(keyExp ? [` && _cached.key === `, keyExp] : []),
                        ` && ${context.helperString(IS_MEMO_SAME)}(_cached, _memo)) return _cached`
                    ]),
                    createCompoundExpression([`const _item = `, childBlock]),
                    createSimpleExpression(`_item.memo = _memo`),
                    createSimpleExpression(`return _item`)
                ]);
                renderExp.arguments.push(loop, createSimpleExpression(`_cache`), createSimpleExpression(String(context.cached++)));
            }
            else {
                renderExp.arguments.push(createFunctionExpression(createForLoopParams(forNode.parseResult), childBlock, true /* force newline */));
            }
        };
    });
});
// target-agnostic transform used for both Client and SSR
function processFor(node, dir, context, processCodegen) {
    if (!dir.exp) {
        context.onError(createCompilerError(31 /* X_V_FOR_NO_EXPRESSION */, dir.loc));
        return;
    }
    const parseResult = parseForExpression(
    // can only be simple expression because vFor transform is applied
    // before expression transform.
    dir.exp, context);
    if (!parseResult) {
        context.onError(createCompilerError(32 /* X_V_FOR_MALFORMED_EXPRESSION */, dir.loc));
        return;
    }
    const { addIdentifiers, removeIdentifiers, scopes } = context;
    const { source, value, key, index } = parseResult;
    const forNode = {
        type: 11 /* FOR */,
        loc: dir.loc,
        source,
        valueAlias: value,
        keyAlias: key,
        objectIndexAlias: index,
        parseResult,
        children: isTemplateNode(node) ? node.children : [node]
    };
    context.replaceNode(forNode);
    // bookkeeping
    scopes.vFor++;
    if (context.prefixIdentifiers) {
        // scope management
        // inject identifiers to context
        value && addIdentifiers(value);
        key && addIdentifiers(key);
        index && addIdentifiers(index);
    }
    const onExit = processCodegen && processCodegen(forNode);
    return () => {
        scopes.vFor--;
        if (context.prefixIdentifiers) {
            value && removeIdentifiers(value);
            key && removeIdentifiers(key);
            index && removeIdentifiers(index);
        }
        if (onExit)
            onExit();
    };
}
const forAliasRE = /([\s\S]*?)\s+(?:in|of)\s+([\s\S]*)/;
// This regex doesn't cover the case if key or index aliases have destructuring,
// but those do not make sense in the first place, so this works in practice.
const forIteratorRE = /,([^,\}\]]*)(?:,([^,\}\]]*))?$/;
const stripParensRE = /^\(|\)$/g;
function parseForExpression(input, context) {
    const loc = input.loc;
    const exp = input.content;
    const inMatch = exp.match(forAliasRE);
    if (!inMatch)
        return;
    const [, LHS, RHS] = inMatch;
    const result = {
        source: createAliasExpression(loc, RHS.trim(), exp.indexOf(RHS, LHS.length)),
        value: undefined,
        key: undefined,
        index: undefined
    };
    if (context.prefixIdentifiers) {
        result.source = processExpression(result.source, context);
    }
    let valueContent = LHS.trim().replace(stripParensRE, '').trim();
    const trimmedOffset = LHS.indexOf(valueContent);
    const iteratorMatch = valueContent.match(forIteratorRE);
    if (iteratorMatch) {
        valueContent = valueContent.replace(forIteratorRE, '').trim();
        const keyContent = iteratorMatch[1].trim();
        let keyOffset;
        if (keyContent) {
            keyOffset = exp.indexOf(keyContent, trimmedOffset + valueContent.length);
            result.key = createAliasExpression(loc, keyContent, keyOffset);
            if (context.prefixIdentifiers) {
                result.key = processExpression(result.key, context, true);
            }
        }
        if (iteratorMatch[2]) {
            const indexContent = iteratorMatch[2].trim();
            if (indexContent) {
                result.index = createAliasExpression(loc, indexContent, exp.indexOf(indexContent, result.key
                    ? keyOffset + keyContent.length
                    : trimmedOffset + valueContent.length));
                if (context.prefixIdentifiers) {
                    result.index = processExpression(result.index, context, true);
                }
            }
        }
    }
    if (valueContent) {
        result.value = createAliasExpression(loc, valueContent, trimmedOffset);
        if (context.prefixIdentifiers) {
            result.value = processExpression(result.value, context, true);
        }
    }
    return result;
}
function createAliasExpression(range, content, offset) {
    return createSimpleExpression(content, false, getInnerRange(range, offset, content.length));
}
function createForLoopParams({ value, key, index }, memoArgs = []) {
    return createParamsList([value, key, index, ...memoArgs]);
}
function createParamsList(args) {
    let i = args.length;
    while (i--) {
        if (args[i])
            break;
    }
    return args
        .slice(0, i + 1)
        .map((arg, i) => arg || createSimpleExpression(`_`.repeat(i + 1), false));
}

const defaultFallback = createSimpleExpression(`undefined`, false);
// A NodeTransform that:
// 1. Tracks scope identifiers for scoped slots so that they don't get prefixed
//    by transformExpression. This is only applied in non-browser builds with
//    { prefixIdentifiers: true }.
// 2. Track v-slot depths so that we know a slot is inside another slot.
//    Note the exit callback is executed before buildSlots() on the same node,
//    so only nested slots see positive numbers.
const trackSlotScopes = (node, context) => {
    if (node.type === 1 /* ELEMENT */ &&
        (node.tagType === 1 /* COMPONENT */ ||
            node.tagType === 3 /* TEMPLATE */)) {
        // We are only checking non-empty v-slot here
        // since we only care about slots that introduce scope variables.
        const vSlot = findDir(node, 'slot');
        if (vSlot) {
            const slotProps = vSlot.exp;
            if (context.prefixIdentifiers) {
                slotProps && context.addIdentifiers(slotProps);
            }
            context.scopes.vSlot++;
            return () => {
                if (context.prefixIdentifiers) {
                    slotProps && context.removeIdentifiers(slotProps);
                }
                context.scopes.vSlot--;
            };
        }
    }
};
// A NodeTransform that tracks scope identifiers for scoped slots with v-for.
// This transform is only applied in non-browser builds with { prefixIdentifiers: true }
const trackVForSlotScopes = (node, context) => {
    let vFor;
    if (isTemplateNode(node) &&
        node.props.some(isVSlot) &&
        (vFor = findDir(node, 'for'))) {
        const result = (vFor.parseResult = parseForExpression(vFor.exp, context));
        if (result) {
            const { value, key, index } = result;
            const { addIdentifiers, removeIdentifiers } = context;
            value && addIdentifiers(value);
            key && addIdentifiers(key);
            index && addIdentifiers(index);
            return () => {
                value && removeIdentifiers(value);
                key && removeIdentifiers(key);
                index && removeIdentifiers(index);
            };
        }
    }
};
const buildClientSlotFn = (props, children, loc) => createFunctionExpression(props, children, false /* newline */, true /* isSlot */, children.length ? children[0].loc : loc);
// Instead of being a DirectiveTransform, v-slot processing is called during
// transformElement to build the slots object for a component.
function buildSlots(node, context, buildSlotFn = buildClientSlotFn) {
    context.helper(WITH_CTX);
    const { children, loc } = node;
    const slotsProperties = [];
    const dynamicSlots = [];
    // If the slot is inside a v-for or another v-slot, force it to be dynamic
    // since it likely uses a scope variable.
    let hasDynamicSlots = context.scopes.vSlot > 0 || context.scopes.vFor > 0;
    // with `prefixIdentifiers: true`, this can be further optimized to make
    // it dynamic only when the slot actually uses the scope variables.
    if (!context.ssr && context.prefixIdentifiers) {
        hasDynamicSlots = hasScopeRef(node, context.identifiers);
    }
    // 1. Check for slot with slotProps on component itself.
    //    <Comp v-slot="{ prop }"/>
    const onComponentSlot = findDir(node, 'slot', true);
    if (onComponentSlot) {
        const { arg, exp } = onComponentSlot;
        if (arg && !isStaticExp(arg)) {
            hasDynamicSlots = true;
        }
        slotsProperties.push(createObjectProperty(arg || createSimpleExpression('default', true), buildSlotFn(exp, children, loc)));
    }
    // 2. Iterate through children and check for template slots
    //    <template v-slot:foo="{ prop }">
    let hasTemplateSlots = false;
    let hasNamedDefaultSlot = false;
    const implicitDefaultChildren = [];
    const seenSlotNames = new Set();
    for (let i = 0; i < children.length; i++) {
        const slotElement = children[i];
        let slotDir;
        if (!isTemplateNode(slotElement) ||
            !(slotDir = findDir(slotElement, 'slot', true))) {
            // not a <template v-slot>, skip.
            if (slotElement.type !== 3 /* COMMENT */) {
                implicitDefaultChildren.push(slotElement);
            }
            continue;
        }
        if (onComponentSlot) {
            // already has on-component slot - this is incorrect usage.
            context.onError(createCompilerError(37 /* X_V_SLOT_MIXED_SLOT_USAGE */, slotDir.loc));
            break;
        }
        hasTemplateSlots = true;
        const { children: slotChildren, loc: slotLoc } = slotElement;
        const { arg: slotName = createSimpleExpression(`default`, true), exp: slotProps, loc: dirLoc } = slotDir;
        // check if name is dynamic.
        let staticSlotName;
        if (isStaticExp(slotName)) {
            staticSlotName = slotName ? slotName.content : `default`;
        }
        else {
            hasDynamicSlots = true;
        }
        const slotFunction = buildSlotFn(slotProps, slotChildren, slotLoc);
        // check if this slot is conditional (v-if/v-for)
        let vIf;
        let vElse;
        let vFor;
        if ((vIf = findDir(slotElement, 'if'))) {
            hasDynamicSlots = true;
            dynamicSlots.push(createConditionalExpression(vIf.exp, buildDynamicSlot(slotName, slotFunction), defaultFallback));
        }
        else if ((vElse = findDir(slotElement, /^else(-if)?$/, true /* allowEmpty */))) {
            // find adjacent v-if
            let j = i;
            let prev;
            while (j--) {
                prev = children[j];
                if (prev.type !== 3 /* COMMENT */) {
                    break;
                }
            }
            if (prev && isTemplateNode(prev) && findDir(prev, 'if')) {
                // remove node
                children.splice(i, 1);
                i--;
                // attach this slot to previous conditional
                let conditional = dynamicSlots[dynamicSlots.length - 1];
                while (conditional.alternate.type === 19 /* JS_CONDITIONAL_EXPRESSION */) {
                    conditional = conditional.alternate;
                }
                conditional.alternate = vElse.exp
                    ? createConditionalExpression(vElse.exp, buildDynamicSlot(slotName, slotFunction), defaultFallback)
                    : buildDynamicSlot(slotName, slotFunction);
            }
            else {
                context.onError(createCompilerError(30 /* X_V_ELSE_NO_ADJACENT_IF */, vElse.loc));
            }
        }
        else if ((vFor = findDir(slotElement, 'for'))) {
            hasDynamicSlots = true;
            const parseResult = vFor.parseResult ||
                parseForExpression(vFor.exp, context);
            if (parseResult) {
                // Render the dynamic slots as an array and add it to the createSlot()
                // args. The runtime knows how to handle it appropriately.
                dynamicSlots.push(createCallExpression(context.helper(RENDER_LIST), [
                    parseResult.source,
                    createFunctionExpression(createForLoopParams(parseResult), buildDynamicSlot(slotName, slotFunction), true /* force newline */)
                ]));
            }
            else {
                context.onError(createCompilerError(32 /* X_V_FOR_MALFORMED_EXPRESSION */, vFor.loc));
            }
        }
        else {
            // check duplicate static names
            if (staticSlotName) {
                if (seenSlotNames.has(staticSlotName)) {
                    context.onError(createCompilerError(38 /* X_V_SLOT_DUPLICATE_SLOT_NAMES */, dirLoc));
                    continue;
                }
                seenSlotNames.add(staticSlotName);
                if (staticSlotName === 'default') {
                    hasNamedDefaultSlot = true;
                }
            }
            slotsProperties.push(createObjectProperty(slotName, slotFunction));
        }
    }
    if (!onComponentSlot) {
        const buildDefaultSlotProperty = (props, children) => {
            const fn = buildSlotFn(props, children, loc);
            return createObjectProperty(`default`, fn);
        };
        if (!hasTemplateSlots) {
            // implicit default slot (on component)
            slotsProperties.push(buildDefaultSlotProperty(undefined, children));
        }
        else if (implicitDefaultChildren.length &&
            // #3766
            // with whitespace: 'preserve', whitespaces between slots will end up in
            // implicitDefaultChildren. Ignore if all implicit children are whitespaces.
            implicitDefaultChildren.some(node => isNonWhitespaceContent(node))) {
            // implicit default slot (mixed with named slots)
            if (hasNamedDefaultSlot) {
                context.onError(createCompilerError(39 /* X_V_SLOT_EXTRANEOUS_DEFAULT_SLOT_CHILDREN */, implicitDefaultChildren[0].loc));
            }
            else {
                slotsProperties.push(buildDefaultSlotProperty(undefined, implicitDefaultChildren));
            }
        }
    }
    const slotFlag = hasDynamicSlots
        ? 2 /* DYNAMIC */
        : hasForwardedSlots(node.children)
            ? 3 /* FORWARDED */
            : 1 /* STABLE */;
    let slots = createObjectExpression(slotsProperties.concat(createObjectProperty(`_`, 
    // 2 = compiled but dynamic = can skip normalization, but must run diff
    // 1 = compiled and static = can skip normalization AND diff as optimized
    createSimpleExpression(slotFlag + (` /* ${slotFlagsText[slotFlag]} */` ), false))), loc);
    if (dynamicSlots.length) {
        slots = createCallExpression(context.helper(CREATE_SLOTS), [
            slots,
            createArrayExpression(dynamicSlots)
        ]);
    }
    return {
        slots,
        hasDynamicSlots
    };
}
function buildDynamicSlot(name, fn) {
    return createObjectExpression([
        createObjectProperty(`name`, name),
        createObjectProperty(`fn`, fn)
    ]);
}
function hasForwardedSlots(children) {
    for (let i = 0; i < children.length; i++) {
        const child = children[i];
        switch (child.type) {
            case 1 /* ELEMENT */:
                if (child.tagType === 2 /* SLOT */ ||
                    hasForwardedSlots(child.children)) {
                    return true;
                }
                break;
            case 9 /* IF */:
                if (hasForwardedSlots(child.branches))
                    return true;
                break;
            case 10 /* IF_BRANCH */:
            case 11 /* FOR */:
                if (hasForwardedSlots(child.children))
                    return true;
                break;
        }
    }
    return false;
}
function isNonWhitespaceContent(node) {
    if (node.type !== 2 /* TEXT */ && node.type !== 12 /* TEXT_CALL */)
        return true;
    return node.type === 2 /* TEXT */
        ? !!node.content.trim()
        : isNonWhitespaceContent(node.content);
}

// some directive transforms (e.g. v-model) may return a symbol for runtime
// import, which should be used instead of a resolveDirective call.
const directiveImportMap = new WeakMap();
// generate a JavaScript AST for this element's codegen
const transformElement = (node, context) => {
    // perform the work on exit, after all child expressions have been
    // processed and merged.
    return function postTransformElement() {
        node = context.currentNode;
        if (!(node.type === 1 /* ELEMENT */ &&
            (node.tagType === 0 /* ELEMENT */ ||
                node.tagType === 1 /* COMPONENT */))) {
            return;
        }
        const { tag, props } = node;
        const isComponent = node.tagType === 1 /* COMPONENT */;
        // The goal of the transform is to create a codegenNode implementing the
        // VNodeCall interface.
        let vnodeTag = isComponent
            ? resolveComponentType(node, context)
            : `"${tag}"`;
        const isDynamicComponent = isObject(vnodeTag) && vnodeTag.callee === RESOLVE_DYNAMIC_COMPONENT;
        let vnodeProps;
        let vnodeChildren;
        let vnodePatchFlag;
        let patchFlag = 0;
        let vnodeDynamicProps;
        let dynamicPropNames;
        let vnodeDirectives;
        let shouldUseBlock = 
        // dynamic component may resolve to plain elements
        isDynamicComponent ||
            vnodeTag === TELEPORT ||
            vnodeTag === SUSPENSE ||
            (!isComponent &&
                // <svg> and <foreignObject> must be forced into blocks so that block
                // updates inside get proper isSVG flag at runtime. (#639, #643)
                // This is technically web-specific, but splitting the logic out of core
                // leads to too much unnecessary complexity.
                (tag === 'svg' || tag === 'foreignObject'));
        // props
        if (props.length > 0) {
            const propsBuildResult = buildProps(node, context, undefined, isComponent, isDynamicComponent);
            vnodeProps = propsBuildResult.props;
            patchFlag = propsBuildResult.patchFlag;
            dynamicPropNames = propsBuildResult.dynamicPropNames;
            const directives = propsBuildResult.directives;
            vnodeDirectives =
                directives && directives.length
                    ? createArrayExpression(directives.map(dir => buildDirectiveArgs(dir, context)))
                    : undefined;
            if (propsBuildResult.shouldUseBlock) {
                shouldUseBlock = true;
            }
        }
        // children
        if (node.children.length > 0) {
            if (vnodeTag === KEEP_ALIVE) {
                // Although a built-in component, we compile KeepAlive with raw children
                // instead of slot functions so that it can be used inside Transition
                // or other Transition-wrapping HOCs.
                // To ensure correct updates with block optimizations, we need to:
                // 1. Force keep-alive into a block. This avoids its children being
                //    collected by a parent block.
                shouldUseBlock = true;
                // 2. Force keep-alive to always be updated, since it uses raw children.
                patchFlag |= 1024 /* DYNAMIC_SLOTS */;
                if (node.children.length > 1) {
                    context.onError(createCompilerError(45 /* X_KEEP_ALIVE_INVALID_CHILDREN */, {
                        start: node.children[0].loc.start,
                        end: node.children[node.children.length - 1].loc.end,
                        source: ''
                    }));
                }
            }
            const shouldBuildAsSlots = isComponent &&
                // Teleport is not a real component and has dedicated runtime handling
                vnodeTag !== TELEPORT &&
                // explained above.
                vnodeTag !== KEEP_ALIVE;
            if (shouldBuildAsSlots) {
                const { slots, hasDynamicSlots } = buildSlots(node, context);
                vnodeChildren = slots;
                if (hasDynamicSlots) {
                    patchFlag |= 1024 /* DYNAMIC_SLOTS */;
                }
            }
            else if (node.children.length === 1 && vnodeTag !== TELEPORT) {
                const child = node.children[0];
                const type = child.type;
                // check for dynamic text children
                const hasDynamicTextChild = type === 5 /* INTERPOLATION */ ||
                    type === 8 /* COMPOUND_EXPRESSION */;
                if (hasDynamicTextChild &&
                    getConstantType(child, context) === 0 /* NOT_CONSTANT */) {
                    patchFlag |= 1 /* TEXT */;
                }
                // pass directly if the only child is a text node
                // (plain / interpolation / expression)
                if (hasDynamicTextChild || type === 2 /* TEXT */) {
                    vnodeChildren = child;
                }
                else {
                    vnodeChildren = node.children;
                }
            }
            else {
                vnodeChildren = node.children;
            }
        }
        // patchFlag & dynamicPropNames
        if (patchFlag !== 0) {
            {
                if (patchFlag < 0) {
                    // special flags (negative and mutually exclusive)
                    vnodePatchFlag = patchFlag + ` /* ${PatchFlagNames[patchFlag]} */`;
                }
                else {
                    // bitwise flags
                    const flagNames = Object.keys(PatchFlagNames)
                        .map(Number)
                        .filter(n => n > 0 && patchFlag & n)
                        .map(n => PatchFlagNames[n])
                        .join(`, `);
                    vnodePatchFlag = patchFlag + ` /* ${flagNames} */`;
                }
            }
            if (dynamicPropNames && dynamicPropNames.length) {
                vnodeDynamicProps = stringifyDynamicPropNames(dynamicPropNames);
            }
        }
        node.codegenNode = createVNodeCall(context, vnodeTag, vnodeProps, vnodeChildren, vnodePatchFlag, vnodeDynamicProps, vnodeDirectives, !!shouldUseBlock, false /* disableTracking */, isComponent, node.loc);
    };
};
function resolveComponentType(node, context, ssr = false) {
    let { tag } = node;
    // 1. dynamic component
    const isExplicitDynamic = isComponentTag(tag);
    const isProp = findProp(node, 'is');
    if (isProp) {
        if (isExplicitDynamic ||
            (false )) {
            const exp = isProp.type === 6 /* ATTRIBUTE */
                ? isProp.value && createSimpleExpression(isProp.value.content, true)
                : isProp.exp;
            if (exp) {
                return createCallExpression(context.helper(RESOLVE_DYNAMIC_COMPONENT), [
                    exp
                ]);
            }
        }
        else if (isProp.type === 6 /* ATTRIBUTE */ &&
            isProp.value.content.startsWith('vue:')) {
            // <button is="vue:xxx">
            // if not <component>, only is value that starts with "vue:" will be
            // treated as component by the parse phase and reach here, unless it's
            // compat mode where all is values are considered components
            tag = isProp.value.content.slice(4);
        }
    }
    // 1.5 v-is (TODO: Deprecate)
    const isDir = !isExplicitDynamic && findDir(node, 'is');
    if (isDir && isDir.exp) {
        return createCallExpression(context.helper(RESOLVE_DYNAMIC_COMPONENT), [
            isDir.exp
        ]);
    }
    // 2. built-in components (Teleport, Transition, KeepAlive, Suspense...)
    const builtIn = isCoreComponent(tag) || context.isBuiltInComponent(tag);
    if (builtIn) {
        // built-ins are simply fallthroughs / have special handling during ssr
        // so we don't need to import their runtime equivalents
        if (!ssr)
            context.helper(builtIn);
        return builtIn;
    }
    // 3. user component (from setup bindings)
    // this is skipped in browser build since browser builds do not perform
    // binding analysis.
    {
        const fromSetup = resolveSetupReference(tag, context);
        if (fromSetup) {
            return fromSetup;
        }
        const dotIndex = tag.indexOf('.');
        if (dotIndex > 0) {
            const ns = resolveSetupReference(tag.slice(0, dotIndex), context);
            if (ns) {
                return ns + tag.slice(dotIndex);
            }
        }
    }
    // 4. Self referencing component (inferred from filename)
    if (context.selfName &&
        capitalize(camelize(tag)) === context.selfName) {
        context.helper(RESOLVE_COMPONENT);
        // codegen.ts has special check for __self postfix when generating
        // component imports, which will pass additional `maybeSelfReference` flag
        // to `resolveComponent`.
        context.components.add(tag + `__self`);
        return toValidAssetId(tag, `component`);
    }
    // 5. user component (resolve)
    context.helper(RESOLVE_COMPONENT);
    context.components.add(tag);
    return toValidAssetId(tag, `component`);
}
function resolveSetupReference(name, context) {
    const bindings = context.bindingMetadata;
    if (!bindings || bindings.__isScriptSetup === false) {
        return;
    }
    const camelName = camelize(name);
    const PascalName = capitalize(camelName);
    const checkType = (type) => {
        if (bindings[name] === type) {
            return name;
        }
        if (bindings[camelName] === type) {
            return camelName;
        }
        if (bindings[PascalName] === type) {
            return PascalName;
        }
    };
    const fromConst = checkType("setup-const" /* SETUP_CONST */) ||
        checkType("setup-reactive-const" /* SETUP_REACTIVE_CONST */);
    if (fromConst) {
        return context.inline
            ? // in inline mode, const setup bindings (e.g. imports) can be used as-is
                fromConst
            : `$setup[${JSON.stringify(fromConst)}]`;
    }
    const fromMaybeRef = checkType("setup-let" /* SETUP_LET */) ||
        checkType("setup-ref" /* SETUP_REF */) ||
        checkType("setup-maybe-ref" /* SETUP_MAYBE_REF */);
    if (fromMaybeRef) {
        return context.inline
            ? // setup scope bindings that may be refs need to be unrefed
                `${context.helperString(UNREF)}(${fromMaybeRef})`
            : `$setup[${JSON.stringify(fromMaybeRef)}]`;
    }
}
function buildProps(node, context, props = node.props, isComponent, isDynamicComponent, ssr = false) {
    const { tag, loc: elementLoc, children } = node;
    let properties = [];
    const mergeArgs = [];
    const runtimeDirectives = [];
    const hasChildren = children.length > 0;
    let shouldUseBlock = false;
    // patchFlag analysis
    let patchFlag = 0;
    let hasRef = false;
    let hasClassBinding = false;
    let hasStyleBinding = false;
    let hasHydrationEventBinding = false;
    let hasDynamicKeys = false;
    let hasVnodeHook = false;
    const dynamicPropNames = [];
    const analyzePatchFlag = ({ key, value }) => {
        if (isStaticExp(key)) {
            const name = key.content;
            const isEventHandler = isOn(name);
            if (isEventHandler &&
                (!isComponent || isDynamicComponent) &&
                // omit the flag for click handlers because hydration gives click
                // dedicated fast path.
                name.toLowerCase() !== 'onclick' &&
                // omit v-model handlers
                name !== 'onUpdate:modelValue' &&
                // omit onVnodeXXX hooks
                !isReservedProp(name)) {
                hasHydrationEventBinding = true;
            }
            if (isEventHandler && isReservedProp(name)) {
                hasVnodeHook = true;
            }
            if (value.type === 20 /* JS_CACHE_EXPRESSION */ ||
                ((value.type === 4 /* SIMPLE_EXPRESSION */ ||
                    value.type === 8 /* COMPOUND_EXPRESSION */) &&
                    getConstantType(value, context) > 0)) {
                // skip if the prop is a cached handler or has constant value
                return;
            }
            if (name === 'ref') {
                hasRef = true;
            }
            else if (name === 'class') {
                hasClassBinding = true;
            }
            else if (name === 'style') {
                hasStyleBinding = true;
            }
            else if (name !== 'key' && !dynamicPropNames.includes(name)) {
                dynamicPropNames.push(name);
            }
            // treat the dynamic class and style binding of the component as dynamic props
            if (isComponent &&
                (name === 'class' || name === 'style') &&
                !dynamicPropNames.includes(name)) {
                dynamicPropNames.push(name);
            }
        }
        else {
            hasDynamicKeys = true;
        }
    };
    for (let i = 0; i < props.length; i++) {
        // static attribute
        const prop = props[i];
        if (prop.type === 6 /* ATTRIBUTE */) {
            const { loc, name, value } = prop;
            let isStatic = true;
            if (name === 'ref') {
                hasRef = true;
                if (context.scopes.vFor > 0) {
                    properties.push(createObjectProperty(createSimpleExpression('ref_for', true), createSimpleExpression('true')));
                }
                // in inline mode there is no setupState object, so we can't use string
                // keys to set the ref. Instead, we need to transform it to pass the
                // actual ref instead.
                if (value &&
                    context.inline &&
                    context.bindingMetadata[value.content]) {
                    isStatic = false;
                    properties.push(createObjectProperty(createSimpleExpression('ref_key', true), createSimpleExpression(value.content, true, value.loc)));
                }
            }
            // skip is on <component>, or is="vue:xxx"
            if (name === 'is' &&
                (isComponentTag(tag) ||
                    (value && value.content.startsWith('vue:')) ||
                    (false ))) {
                continue;
            }
            properties.push(createObjectProperty(createSimpleExpression(name, true, getInnerRange(loc, 0, name.length)), createSimpleExpression(value ? value.content : '', isStatic, value ? value.loc : loc)));
        }
        else {
            // directives
            const { name, arg, exp, loc } = prop;
            const isVBind = name === 'bind';
            const isVOn = name === 'on';
            // skip v-slot - it is handled by its dedicated transform.
            if (name === 'slot') {
                if (!isComponent) {
                    context.onError(createCompilerError(40 /* X_V_SLOT_MISPLACED */, loc));
                }
                continue;
            }
            // skip v-once/v-memo - they are handled by dedicated transforms.
            if (name === 'once' || name === 'memo') {
                continue;
            }
            // skip v-is and :is on <component>
            if (name === 'is' ||
                (isVBind &&
                    isStaticArgOf(arg, 'is') &&
                    (isComponentTag(tag) ||
                        (false )))) {
                continue;
            }
            // skip v-on in SSR compilation
            if (isVOn && ssr) {
                continue;
            }
            if (
            // #938: elements with dynamic keys should be forced into blocks
            (isVBind && isStaticArgOf(arg, 'key')) ||
                // inline before-update hooks need to force block so that it is invoked
                // before children
                (isVOn && hasChildren && isStaticArgOf(arg, 'vue:before-update'))) {
                shouldUseBlock = true;
            }
            if (isVBind && isStaticArgOf(arg, 'ref') && context.scopes.vFor > 0) {
                properties.push(createObjectProperty(createSimpleExpression('ref_for', true), createSimpleExpression('true')));
            }
            // special case for v-bind and v-on with no argument
            if (!arg && (isVBind || isVOn)) {
                hasDynamicKeys = true;
                if (exp) {
                    if (properties.length) {
                        mergeArgs.push(createObjectExpression(dedupeProperties(properties), elementLoc));
                        properties = [];
                    }
                    if (isVBind) {
                        mergeArgs.push(exp);
                    }
                    else {
                        // v-on="obj" -> toHandlers(obj)
                        mergeArgs.push({
                            type: 14 /* JS_CALL_EXPRESSION */,
                            loc,
                            callee: context.helper(TO_HANDLERS),
                            arguments: [exp]
                        });
                    }
                }
                else {
                    context.onError(createCompilerError(isVBind
                        ? 34 /* X_V_BIND_NO_EXPRESSION */
                        : 35 /* X_V_ON_NO_EXPRESSION */, loc));
                }
                continue;
            }
            const directiveTransform = context.directiveTransforms[name];
            if (directiveTransform) {
                // has built-in directive transform.
                const { props, needRuntime } = directiveTransform(prop, node, context);
                !ssr && props.forEach(analyzePatchFlag);
                properties.push(...props);
                if (needRuntime) {
                    runtimeDirectives.push(prop);
                    if (isSymbol(needRuntime)) {
                        directiveImportMap.set(prop, needRuntime);
                    }
                }
            }
            else if (!isBuiltInDirective(name)) {
                // no built-in transform, this is a user custom directive.
                runtimeDirectives.push(prop);
                // custom dirs may use beforeUpdate so they need to force blocks
                // to ensure before-update gets called before children update
                if (hasChildren) {
                    shouldUseBlock = true;
                }
            }
        }
    }
    let propsExpression = undefined;
    // has v-bind="object" or v-on="object", wrap with mergeProps
    if (mergeArgs.length) {
        if (properties.length) {
            mergeArgs.push(createObjectExpression(dedupeProperties(properties), elementLoc));
        }
        if (mergeArgs.length > 1) {
            propsExpression = createCallExpression(context.helper(MERGE_PROPS), mergeArgs, elementLoc);
        }
        else {
            // single v-bind with nothing else - no need for a mergeProps call
            propsExpression = mergeArgs[0];
        }
    }
    else if (properties.length) {
        propsExpression = createObjectExpression(dedupeProperties(properties), elementLoc);
    }
    // patchFlag analysis
    if (hasDynamicKeys) {
        patchFlag |= 16 /* FULL_PROPS */;
    }
    else {
        if (hasClassBinding && !isComponent) {
            patchFlag |= 2 /* CLASS */;
        }
        if (hasStyleBinding && !isComponent) {
            patchFlag |= 4 /* STYLE */;
        }
        if (dynamicPropNames.length) {
            patchFlag |= 8 /* PROPS */;
        }
        if (hasHydrationEventBinding) {
            patchFlag |= 32 /* HYDRATE_EVENTS */;
        }
    }
    if (!shouldUseBlock &&
        (patchFlag === 0 || patchFlag === 32 /* HYDRATE_EVENTS */) &&
        (hasRef || hasVnodeHook || runtimeDirectives.length > 0)) {
        patchFlag |= 512 /* NEED_PATCH */;
    }
    // pre-normalize props, SSR is skipped for now
    if (!context.inSSR && propsExpression) {
        switch (propsExpression.type) {
            case 15 /* JS_OBJECT_EXPRESSION */:
                // means that there is no v-bind,
                // but still need to deal with dynamic key binding
                let classKeyIndex = -1;
                let styleKeyIndex = -1;
                let hasDynamicKey = false;
                for (let i = 0; i < propsExpression.properties.length; i++) {
                    const key = propsExpression.properties[i].key;
                    if (isStaticExp(key)) {
                        if (key.content === 'class') {
                            classKeyIndex = i;
                        }
                        else if (key.content === 'style') {
                            styleKeyIndex = i;
                        }
                    }
                    else if (!key.isHandlerKey) {
                        hasDynamicKey = true;
                    }
                }
                const classProp = propsExpression.properties[classKeyIndex];
                const styleProp = propsExpression.properties[styleKeyIndex];
                // no dynamic key
                if (!hasDynamicKey) {
                    if (classProp && !isStaticExp(classProp.value)) {
                        classProp.value = createCallExpression(context.helper(NORMALIZE_CLASS), [classProp.value]);
                    }
                    if (styleProp &&
                        // the static style is compiled into an object,
                        // so use `hasStyleBinding` to ensure that it is a dynamic style binding
                        (hasStyleBinding ||
                            (styleProp.value.type === 4 /* SIMPLE_EXPRESSION */ &&
                                styleProp.value.content.trim()[0] === `[`) ||
                            // v-bind:style and style both exist,
                            // v-bind:style with static literal object
                            styleProp.value.type === 17 /* JS_ARRAY_EXPRESSION */)) {
                        styleProp.value = createCallExpression(context.helper(NORMALIZE_STYLE), [styleProp.value]);
                    }
                }
                else {
                    // dynamic key binding, wrap with `normalizeProps`
                    propsExpression = createCallExpression(context.helper(NORMALIZE_PROPS), [propsExpression]);
                }
                break;
            case 14 /* JS_CALL_EXPRESSION */:
                // mergeProps call, do nothing
                break;
            default:
                // single v-bind
                propsExpression = createCallExpression(context.helper(NORMALIZE_PROPS), [
                    createCallExpression(context.helper(GUARD_REACTIVE_PROPS), [
                        propsExpression
                    ])
                ]);
                break;
        }
    }
    return {
        props: propsExpression,
        directives: runtimeDirectives,
        patchFlag,
        dynamicPropNames,
        shouldUseBlock
    };
}
// Dedupe props in an object literal.
// Literal duplicated attributes would have been warned during the parse phase,
// however, it's possible to encounter duplicated `onXXX` handlers with different
// modifiers. We also need to merge static and dynamic class / style attributes.
// - onXXX handlers / style: merge into array
// - class: merge into single expression with concatenation
function dedupeProperties(properties) {
    const knownProps = new Map();
    const deduped = [];
    for (let i = 0; i < properties.length; i++) {
        const prop = properties[i];
        // dynamic keys are always allowed
        if (prop.key.type === 8 /* COMPOUND_EXPRESSION */ || !prop.key.isStatic) {
            deduped.push(prop);
            continue;
        }
        const name = prop.key.content;
        const existing = knownProps.get(name);
        if (existing) {
            if (name === 'style' || name === 'class' || isOn(name)) {
                mergeAsArray(existing, prop);
            }
            // unexpected duplicate, should have emitted error during parse
        }
        else {
            knownProps.set(name, prop);
            deduped.push(prop);
        }
    }
    return deduped;
}
function mergeAsArray(existing, incoming) {
    if (existing.value.type === 17 /* JS_ARRAY_EXPRESSION */) {
        existing.value.elements.push(incoming.value);
    }
    else {
        existing.value = createArrayExpression([existing.value, incoming.value], existing.loc);
    }
}
function buildDirectiveArgs(dir, context) {
    const dirArgs = [];
    const runtime = directiveImportMap.get(dir);
    if (runtime) {
        // built-in directive with runtime
        dirArgs.push(context.helperString(runtime));
    }
    else {
        // user directive.
        // see if we have directives exposed via <script setup>
        const fromSetup = resolveSetupReference('v-' + dir.name, context);
        if (fromSetup) {
            dirArgs.push(fromSetup);
        }
        else {
            // inject statement for resolving directive
            context.helper(RESOLVE_DIRECTIVE);
            context.directives.add(dir.name);
            dirArgs.push(toValidAssetId(dir.name, `directive`));
        }
    }
    const { loc } = dir;
    if (dir.exp)
        dirArgs.push(dir.exp);
    if (dir.arg) {
        if (!dir.exp) {
            dirArgs.push(`void 0`);
        }
        dirArgs.push(dir.arg);
    }
    if (Object.keys(dir.modifiers).length) {
        if (!dir.arg) {
            if (!dir.exp) {
                dirArgs.push(`void 0`);
            }
            dirArgs.push(`void 0`);
        }
        const trueExpression = createSimpleExpression(`true`, false, loc);
        dirArgs.push(createObjectExpression(dir.modifiers.map(modifier => createObjectProperty(modifier, trueExpression)), loc));
    }
    return createArrayExpression(dirArgs, dir.loc);
}
function stringifyDynamicPropNames(props) {
    let propsNamesString = `[`;
    for (let i = 0, l = props.length; i < l; i++) {
        propsNamesString += JSON.stringify(props[i]);
        if (i < l - 1)
            propsNamesString += ', ';
    }
    return propsNamesString + `]`;
}
function isComponentTag(tag) {
    return tag === 'component' || tag === 'Component';
}

const transformSlotOutlet = (node, context) => {
    if (isSlotOutlet(node)) {
        const { children, loc } = node;
        const { slotName, slotProps } = processSlotOutlet(node, context);
        const slotArgs = [
            context.prefixIdentifiers ? `_ctx.$slots` : `$slots`,
            slotName,
            '{}',
            'undefined',
            'true'
        ];
        let expectedLen = 2;
        if (slotProps) {
            slotArgs[2] = slotProps;
            expectedLen = 3;
        }
        if (children.length) {
            slotArgs[3] = createFunctionExpression([], children, false, false, loc);
            expectedLen = 4;
        }
        if (context.scopeId && !context.slotted) {
            expectedLen = 5;
        }
        slotArgs.splice(expectedLen); // remove unused arguments
        node.codegenNode = createCallExpression(context.helper(RENDER_SLOT), slotArgs, loc);
    }
};
function processSlotOutlet(node, context) {
    let slotName = `"default"`;
    let slotProps = undefined;
    const nonNameProps = [];
    for (let i = 0; i < node.props.length; i++) {
        const p = node.props[i];
        if (p.type === 6 /* ATTRIBUTE */) {
            if (p.value) {
                if (p.name === 'name') {
                    slotName = JSON.stringify(p.value.content);
                }
                else {
                    p.name = camelize(p.name);
                    nonNameProps.push(p);
                }
            }
        }
        else {
            if (p.name === 'bind' && isStaticArgOf(p.arg, 'name')) {
                if (p.exp)
                    slotName = p.exp;
            }
            else {
                if (p.name === 'bind' && p.arg && isStaticExp(p.arg)) {
                    p.arg.content = camelize(p.arg.content);
                }
                nonNameProps.push(p);
            }
        }
    }
    if (nonNameProps.length > 0) {
        const { props, directives } = buildProps(node, context, nonNameProps, false, false);
        slotProps = props;
        if (directives.length) {
            context.onError(createCompilerError(36 /* X_V_SLOT_UNEXPECTED_DIRECTIVE_ON_SLOT_OUTLET */, directives[0].loc));
        }
    }
    return {
        slotName,
        slotProps
    };
}

const fnExpRE = /^\s*([\w$_]+|(async\s*)?\([^)]*?\))\s*=>|^\s*(async\s+)?function(?:\s+[\w$]+)?\s*\(/;
const transformOn = (dir, node, context, augmentor) => {
    const { loc, modifiers, arg } = dir;
    if (!dir.exp && !modifiers.length) {
        context.onError(createCompilerError(35 /* X_V_ON_NO_EXPRESSION */, loc));
    }
    let eventName;
    if (arg.type === 4 /* SIMPLE_EXPRESSION */) {
        if (arg.isStatic) {
            let rawName = arg.content;
            // TODO deprecate @vnodeXXX usage
            if (rawName.startsWith('vue:')) {
                rawName = `vnode-${rawName.slice(4)}`;
            }
            // for all event listeners, auto convert it to camelCase. See issue #2249
            eventName = createSimpleExpression(toHandlerKey(camelize(rawName)), true, arg.loc);
        }
        else {
            // #2388
            eventName = createCompoundExpression([
                `${context.helperString(TO_HANDLER_KEY)}(`,
                arg,
                `)`
            ]);
        }
    }
    else {
        // already a compound expression.
        eventName = arg;
        eventName.children.unshift(`${context.helperString(TO_HANDLER_KEY)}(`);
        eventName.children.push(`)`);
    }
    // handler processing
    let exp = dir.exp;
    if (exp && !exp.content.trim()) {
        exp = undefined;
    }
    let shouldCache = context.cacheHandlers && !exp && !context.inVOnce;
    if (exp) {
        const isMemberExp = isMemberExpression(exp.content, context);
        const isInlineStatement = !(isMemberExp || fnExpRE.test(exp.content));
        const hasMultipleStatements = exp.content.includes(`;`);
        // process the expression since it's been skipped
        if (context.prefixIdentifiers) {
            isInlineStatement && context.addIdentifiers(`$event`);
            exp = dir.exp = processExpression(exp, context, false, hasMultipleStatements);
            isInlineStatement && context.removeIdentifiers(`$event`);
            // with scope analysis, the function is hoistable if it has no reference
            // to scope variables.
            shouldCache =
                context.cacheHandlers &&
                    // unnecessary to cache inside v-once
                    !context.inVOnce &&
                    // runtime constants don't need to be cached
                    // (this is analyzed by compileScript in SFC <script setup>)
                    !(exp.type === 4 /* SIMPLE_EXPRESSION */ && exp.constType > 0) &&
                    // #1541 bail if this is a member exp handler passed to a component -
                    // we need to use the original function to preserve arity,
                    // e.g. <transition> relies on checking cb.length to determine
                    // transition end handling. Inline function is ok since its arity
                    // is preserved even when cached.
                    !(isMemberExp && node.tagType === 1 /* COMPONENT */) &&
                    // bail if the function references closure variables (v-for, v-slot)
                    // it must be passed fresh to avoid stale values.
                    !hasScopeRef(exp, context.identifiers);
            // If the expression is optimizable and is a member expression pointing
            // to a function, turn it into invocation (and wrap in an arrow function
            // below) so that it always accesses the latest value when called - thus
            // avoiding the need to be patched.
            if (shouldCache && isMemberExp) {
                if (exp.type === 4 /* SIMPLE_EXPRESSION */) {
                    exp.content = `${exp.content} && ${exp.content}(...args)`;
                }
                else {
                    exp.children = [...exp.children, ` && `, ...exp.children, `(...args)`];
                }
            }
        }
        if (isInlineStatement || (shouldCache && isMemberExp)) {
            // wrap inline statement in a function expression
            exp = createCompoundExpression([
                `${isInlineStatement
                    ? context.isTS
                        ? `($event: any)`
                        : `$event`
                    : `${context.isTS ? `\n//@ts-ignore\n` : ``}(...args)`} => ${hasMultipleStatements ? `{` : `(`}`,
                exp,
                hasMultipleStatements ? `}` : `)`
            ]);
        }
    }
    let ret = {
        props: [
            createObjectProperty(eventName, exp || createSimpleExpression(`() => {}`, false, loc))
        ]
    };
    // apply extended compiler augmentor
    if (augmentor) {
        ret = augmentor(ret);
    }
    if (shouldCache) {
        // cache handlers so that it's always the same handler being passed down.
        // this avoids unnecessary re-renders when users use inline handlers on
        // components.
        ret.props[0].value = context.cache(ret.props[0].value);
    }
    // mark the key as handler for props normalization check
    ret.props.forEach(p => (p.key.isHandlerKey = true));
    return ret;
};

// v-bind without arg is handled directly in ./transformElements.ts due to it affecting
// codegen for the entire props object. This transform here is only for v-bind
// *with* args.
const transformBind = (dir, _node, context) => {
    const { exp, modifiers, loc } = dir;
    const arg = dir.arg;
    if (arg.type !== 4 /* SIMPLE_EXPRESSION */) {
        arg.children.unshift(`(`);
        arg.children.push(`) || ""`);
    }
    else if (!arg.isStatic) {
        arg.content = `${arg.content} || ""`;
    }
    // .sync is replaced by v-model:arg
    if (modifiers.includes('camel')) {
        if (arg.type === 4 /* SIMPLE_EXPRESSION */) {
            if (arg.isStatic) {
                arg.content = camelize(arg.content);
            }
            else {
                arg.content = `${context.helperString(CAMELIZE)}(${arg.content})`;
            }
        }
        else {
            arg.children.unshift(`${context.helperString(CAMELIZE)}(`);
            arg.children.push(`)`);
        }
    }
    if (!context.inSSR) {
        if (modifiers.includes('prop')) {
            injectPrefix(arg, '.');
        }
        if (modifiers.includes('attr')) {
            injectPrefix(arg, '^');
        }
    }
    if (!exp ||
        (exp.type === 4 /* SIMPLE_EXPRESSION */ && !exp.content.trim())) {
        context.onError(createCompilerError(34 /* X_V_BIND_NO_EXPRESSION */, loc));
        return {
            props: [createObjectProperty(arg, createSimpleExpression('', true, loc))]
        };
    }
    return {
        props: [createObjectProperty(arg, exp)]
    };
};
const injectPrefix = (arg, prefix) => {
    if (arg.type === 4 /* SIMPLE_EXPRESSION */) {
        if (arg.isStatic) {
            arg.content = prefix + arg.content;
        }
        else {
            arg.content = `\`${prefix}\${${arg.content}}\``;
        }
    }
    else {
        arg.children.unshift(`'${prefix}' + (`);
        arg.children.push(`)`);
    }
};

// Merge adjacent text nodes and expressions into a single expression
// e.g. <div>abc {{ d }} {{ e }}</div> should have a single expression node as child.
const transformText = (node, context) => {
    if (node.type === 0 /* ROOT */ ||
        node.type === 1 /* ELEMENT */ ||
        node.type === 11 /* FOR */ ||
        node.type === 10 /* IF_BRANCH */) {
        // perform the transform on node exit so that all expressions have already
        // been processed.
        return () => {
            const children = node.children;
            let currentContainer = undefined;
            let hasText = false;
            for (let i = 0; i < children.length; i++) {
                const child = children[i];
                if (isText(child)) {
                    hasText = true;
                    for (let j = i + 1; j < children.length; j++) {
                        const next = children[j];
                        if (isText(next)) {
                            if (!currentContainer) {
                                currentContainer = children[i] = createCompoundExpression([child], child.loc);
                            }
                            // merge adjacent text node into current
                            currentContainer.children.push(` + `, next);
                            children.splice(j, 1);
                            j--;
                        }
                        else {
                            currentContainer = undefined;
                            break;
                        }
                    }
                }
            }
            if (!hasText ||
                // if this is a plain element with a single text child, leave it
                // as-is since the runtime has dedicated fast path for this by directly
                // setting textContent of the element.
                // for component root it's always normalized anyway.
                (children.length === 1 &&
                    (node.type === 0 /* ROOT */ ||
                        (node.type === 1 /* ELEMENT */ &&
                            node.tagType === 0 /* ELEMENT */ &&
                            // #3756
                            // custom directives can potentially add DOM elements arbitrarily,
                            // we need to avoid setting textContent of the element at runtime
                            // to avoid accidentally overwriting the DOM elements added
                            // by the user through custom directives.
                            !node.props.find(p => p.type === 7 /* DIRECTIVE */ &&
                                !context.directiveTransforms[p.name]) &&
                            // in compat mode, <template> tags with no special directives
                            // will be rendered as a fragment so its children must be
                            // converted into vnodes.
                            !(false ))))) {
                return;
            }
            // pre-convert text nodes into createTextVNode(text) calls to avoid
            // runtime normalization.
            for (let i = 0; i < children.length; i++) {
                const child = children[i];
                if (isText(child) || child.type === 8 /* COMPOUND_EXPRESSION */) {
                    const callArgs = [];
                    // createTextVNode defaults to single whitespace, so if it is a
                    // single space the code could be an empty call to save bytes.
                    if (child.type !== 2 /* TEXT */ || child.content !== ' ') {
                        callArgs.push(child);
                    }
                    // mark dynamic text with flag so it gets patched inside a block
                    if (!context.ssr &&
                        getConstantType(child, context) === 0 /* NOT_CONSTANT */) {
                        callArgs.push(1 /* TEXT */ +
                            (` /* ${PatchFlagNames[1 /* TEXT */]} */` ));
                    }
                    children[i] = {
                        type: 12 /* TEXT_CALL */,
                        content: child,
                        loc: child.loc,
                        codegenNode: createCallExpression(context.helper(CREATE_TEXT), callArgs)
                    };
                }
            }
        };
    }
};

const seen = new WeakSet();
const transformOnce = (node, context) => {
    if (node.type === 1 /* ELEMENT */ && findDir(node, 'once', true)) {
        if (seen.has(node) || context.inVOnce) {
            return;
        }
        seen.add(node);
        context.inVOnce = true;
        context.helper(SET_BLOCK_TRACKING);
        return () => {
            context.inVOnce = false;
            const cur = context.currentNode;
            if (cur.codegenNode) {
                cur.codegenNode = context.cache(cur.codegenNode, true /* isVNode */);
            }
        };
    }
};

const transformModel = (dir, node, context) => {
    const { exp, arg } = dir;
    if (!exp) {
        context.onError(createCompilerError(41 /* X_V_MODEL_NO_EXPRESSION */, dir.loc));
        return createTransformProps();
    }
    const rawExp = exp.loc.source;
    const expString = exp.type === 4 /* SIMPLE_EXPRESSION */ ? exp.content : rawExp;
    // im SFC <script setup> inline mode, the exp may have been transformed into
    // _unref(exp)
    const bindingType = context.bindingMetadata[rawExp];
    const maybeRef = context.inline &&
        bindingType &&
        bindingType !== "setup-const" /* SETUP_CONST */;
    if (!expString.trim() ||
        (!isMemberExpression(expString, context) && !maybeRef)) {
        context.onError(createCompilerError(42 /* X_V_MODEL_MALFORMED_EXPRESSION */, exp.loc));
        return createTransformProps();
    }
    if (context.prefixIdentifiers &&
        isSimpleIdentifier(expString) &&
        context.identifiers[expString]) {
        context.onError(createCompilerError(43 /* X_V_MODEL_ON_SCOPE_VARIABLE */, exp.loc));
        return createTransformProps();
    }
    const propName = arg ? arg : createSimpleExpression('modelValue', true);
    const eventName = arg
        ? isStaticExp(arg)
            ? `onUpdate:${arg.content}`
            : createCompoundExpression(['"onUpdate:" + ', arg])
        : `onUpdate:modelValue`;
    let assignmentExp;
    const eventArg = context.isTS ? `($event: any)` : `$event`;
    if (maybeRef) {
        if (bindingType === "setup-ref" /* SETUP_REF */) {
            // v-model used on known ref.
            assignmentExp = createCompoundExpression([
                `${eventArg} => ((`,
                createSimpleExpression(rawExp, false, exp.loc),
                `).value = $event)`
            ]);
        }
        else {
            // v-model used on a potentially ref binding in <script setup> inline mode.
            // the assignment needs to check whether the binding is actually a ref.
            const altAssignment = bindingType === "setup-let" /* SETUP_LET */ ? `${rawExp} = $event` : `null`;
            assignmentExp = createCompoundExpression([
                `${eventArg} => (${context.helperString(IS_REF)}(${rawExp}) ? (`,
                createSimpleExpression(rawExp, false, exp.loc),
                `).value = $event : ${altAssignment})`
            ]);
        }
    }
    else {
        assignmentExp = createCompoundExpression([
            `${eventArg} => ((`,
            exp,
            `) = $event)`
        ]);
    }
    const props = [
        // modelValue: foo
        createObjectProperty(propName, dir.exp),
        // "onUpdate:modelValue": $event => (foo = $event)
        createObjectProperty(eventName, assignmentExp)
    ];
    // cache v-model handler if applicable (when it doesn't refer any scope vars)
    if (context.prefixIdentifiers &&
        !context.inVOnce &&
        context.cacheHandlers &&
        !hasScopeRef(exp, context.identifiers)) {
        props[1].value = context.cache(props[1].value);
    }
    // modelModifiers: { foo: true, "bar-baz": true }
    if (dir.modifiers.length && node.tagType === 1 /* COMPONENT */) {
        const modifiers = dir.modifiers
            .map(m => (isSimpleIdentifier(m) ? m : JSON.stringify(m)) + `: true`)
            .join(`, `);
        const modifiersKey = arg
            ? isStaticExp(arg)
                ? `${arg.content}Modifiers`
                : createCompoundExpression([arg, ' + "Modifiers"'])
            : `modelModifiers`;
        props.push(createObjectProperty(modifiersKey, createSimpleExpression(`{ ${modifiers} }`, false, dir.loc, 2 /* CAN_HOIST */)));
    }
    return createTransformProps(props);
};
function createTransformProps(props = []) {
    return { props };
}

const seen$1 = new WeakSet();
const transformMemo = (node, context) => {
    if (node.type === 1 /* ELEMENT */) {
        const dir = findDir(node, 'memo');
        if (!dir || seen$1.has(node)) {
            return;
        }
        seen$1.add(node);
        return () => {
            const codegenNode = node.codegenNode ||
                context.currentNode.codegenNode;
            if (codegenNode && codegenNode.type === 13 /* VNODE_CALL */) {
                // non-component sub tree should be turned into a block
                if (node.tagType !== 1 /* COMPONENT */) {
                    makeBlock(codegenNode, context);
                }
                node.codegenNode = createCallExpression(context.helper(WITH_MEMO), [
                    dir.exp,
                    createFunctionExpression(undefined, codegenNode),
                    `_cache`,
                    String(context.cached++)
                ]);
            }
        };
    }
};

function getBaseTransformPreset(prefixIdentifiers) {
    return [
        [
            transformOnce,
            transformIf,
            transformMemo,
            transformFor,
            ...([]),
            ...(prefixIdentifiers
                ? [
                    // order is important
                    trackVForSlotScopes,
                    transformExpression
                ]
                : []),
            transformSlotOutlet,
            transformElement,
            trackSlotScopes,
            transformText
        ],
        {
            on: transformOn,
            bind: transformBind,
            model: transformModel
        }
    ];
}
// we name it `baseCompile` so that higher order compilers like
// @vue/compiler-dom can export `compile` while re-exporting everything else.
function baseCompile(template, options = {}) {
    const onError = options.onError || defaultOnError;
    const isModuleMode = options.mode === 'module';
    const prefixIdentifiers = (options.prefixIdentifiers === true || isModuleMode);
    if (!prefixIdentifiers && options.cacheHandlers) {
        onError(createCompilerError(48 /* X_CACHE_HANDLER_NOT_SUPPORTED */));
    }
    if (options.scopeId && !isModuleMode) {
        onError(createCompilerError(49 /* X_SCOPE_ID_NOT_SUPPORTED */));
    }
    const ast = isString(template) ? baseParse(template, options) : template;
    const [nodeTransforms, directiveTransforms] = getBaseTransformPreset(prefixIdentifiers);
    if (options.isTS) {
        const { expressionPlugins } = options;
        if (!expressionPlugins || !expressionPlugins.includes('typescript')) {
            options.expressionPlugins = [...(expressionPlugins || []), 'typescript'];
        }
    }
    transform(ast, extend({}, options, {
        prefixIdentifiers,
        nodeTransforms: [
            ...nodeTransforms,
            ...(options.nodeTransforms || []) // user transforms
        ],
        directiveTransforms: extend({}, directiveTransforms, options.directiveTransforms || {} // user transforms
        )
    }));
    return generate(ast, extend({}, options, {
        prefixIdentifiers
    }));
}

const noopDirectiveTransform = () => ({ props: [] });

const V_MODEL_RADIO = Symbol(`vModelRadio` );
const V_MODEL_CHECKBOX = Symbol(`vModelCheckbox` );
const V_MODEL_TEXT = Symbol(`vModelText` );
const V_MODEL_SELECT = Symbol(`vModelSelect` );
const V_MODEL_DYNAMIC = Symbol(`vModelDynamic` );
const V_ON_WITH_MODIFIERS = Symbol(`vOnModifiersGuard` );
const V_ON_WITH_KEYS = Symbol(`vOnKeysGuard` );
const V_SHOW = Symbol(`vShow` );
const TRANSITION = Symbol(`Transition` );
const TRANSITION_GROUP = Symbol(`TransitionGroup` );
registerRuntimeHelpers({
    [V_MODEL_RADIO]: `vModelRadio`,
    [V_MODEL_CHECKBOX]: `vModelCheckbox`,
    [V_MODEL_TEXT]: `vModelText`,
    [V_MODEL_SELECT]: `vModelSelect`,
    [V_MODEL_DYNAMIC]: `vModelDynamic`,
    [V_ON_WITH_MODIFIERS]: `withModifiers`,
    [V_ON_WITH_KEYS]: `withKeys`,
    [V_SHOW]: `vShow`,
    [TRANSITION]: `Transition`,
    [TRANSITION_GROUP]: `TransitionGroup`
});

var namedCharacterReferences = {
	GT: ">",
	gt: ">",
	LT: "<",
	lt: "<",
	"ac;": "∾",
	"af;": "⁡",
	AMP: "&",
	amp: "&",
	"ap;": "≈",
	"DD;": "ⅅ",
	"dd;": "ⅆ",
	deg: "°",
	"ee;": "ⅇ",
	"eg;": "⪚",
	"el;": "⪙",
	ETH: "Ð",
	eth: "ð",
	"gE;": "≧",
	"ge;": "≥",
	"Gg;": "⋙",
	"gg;": "≫",
	"gl;": "≷",
	"GT;": ">",
	"Gt;": "≫",
	"gt;": ">",
	"ic;": "⁣",
	"ii;": "ⅈ",
	"Im;": "ℑ",
	"in;": "∈",
	"it;": "⁢",
	"lE;": "≦",
	"le;": "≤",
	"lg;": "≶",
	"Ll;": "⋘",
	"ll;": "≪",
	"LT;": "<",
	"Lt;": "≪",
	"lt;": "<",
	"mp;": "∓",
	"Mu;": "Μ",
	"mu;": "μ",
	"ne;": "≠",
	"ni;": "∋",
	not: "¬",
	"Nu;": "Ν",
	"nu;": "ν",
	"Or;": "⩔",
	"or;": "∨",
	"oS;": "Ⓢ",
	"Pi;": "Π",
	"pi;": "π",
	"pm;": "±",
	"Pr;": "⪻",
	"pr;": "≺",
	"Re;": "ℜ",
	REG: "®",
	reg: "®",
	"rx;": "℞",
	"Sc;": "⪼",
	"sc;": "≻",
	shy: "­",
	uml: "¨",
	"wp;": "℘",
	"wr;": "≀",
	"Xi;": "Ξ",
	"xi;": "ξ",
	yen: "¥",
	"acd;": "∿",
	"acE;": "∾̳",
	"Acy;": "А",
	"acy;": "а",
	"Afr;": "𝔄",
	"afr;": "𝔞",
	"AMP;": "&",
	"amp;": "&",
	"And;": "⩓",
	"and;": "∧",
	"ang;": "∠",
	"apE;": "⩰",
	"ape;": "≊",
	"ast;": "*",
	Auml: "Ä",
	auml: "ä",
	"Bcy;": "Б",
	"bcy;": "б",
	"Bfr;": "𝔅",
	"bfr;": "𝔟",
	"bne;": "=⃥",
	"bot;": "⊥",
	"Cap;": "⋒",
	"cap;": "∩",
	cent: "¢",
	"Cfr;": "ℭ",
	"cfr;": "𝔠",
	"Chi;": "Χ",
	"chi;": "χ",
	"cir;": "○",
	COPY: "©",
	copy: "©",
	"Cup;": "⋓",
	"cup;": "∪",
	"Dcy;": "Д",
	"dcy;": "д",
	"deg;": "°",
	"Del;": "∇",
	"Dfr;": "𝔇",
	"dfr;": "𝔡",
	"die;": "¨",
	"div;": "÷",
	"Dot;": "¨",
	"dot;": "˙",
	"Ecy;": "Э",
	"ecy;": "э",
	"Efr;": "𝔈",
	"efr;": "𝔢",
	"egs;": "⪖",
	"ell;": "ℓ",
	"els;": "⪕",
	"ENG;": "Ŋ",
	"eng;": "ŋ",
	"Eta;": "Η",
	"eta;": "η",
	"ETH;": "Ð",
	"eth;": "ð",
	Euml: "Ë",
	euml: "ë",
	"Fcy;": "Ф",
	"fcy;": "ф",
	"Ffr;": "𝔉",
	"ffr;": "𝔣",
	"gap;": "⪆",
	"Gcy;": "Г",
	"gcy;": "г",
	"gEl;": "⪌",
	"gel;": "⋛",
	"geq;": "≥",
	"ges;": "⩾",
	"Gfr;": "𝔊",
	"gfr;": "𝔤",
	"ggg;": "⋙",
	"gla;": "⪥",
	"glE;": "⪒",
	"glj;": "⪤",
	"gnE;": "≩",
	"gne;": "⪈",
	"Hat;": "^",
	"Hfr;": "ℌ",
	"hfr;": "𝔥",
	"Icy;": "И",
	"icy;": "и",
	"iff;": "⇔",
	"Ifr;": "ℑ",
	"ifr;": "𝔦",
	"Int;": "∬",
	"int;": "∫",
	Iuml: "Ï",
	iuml: "ï",
	"Jcy;": "Й",
	"jcy;": "й",
	"Jfr;": "𝔍",
	"jfr;": "𝔧",
	"Kcy;": "К",
	"kcy;": "к",
	"Kfr;": "𝔎",
	"kfr;": "𝔨",
	"lap;": "⪅",
	"lat;": "⪫",
	"Lcy;": "Л",
	"lcy;": "л",
	"lEg;": "⪋",
	"leg;": "⋚",
	"leq;": "≤",
	"les;": "⩽",
	"Lfr;": "𝔏",
	"lfr;": "𝔩",
	"lgE;": "⪑",
	"lnE;": "≨",
	"lne;": "⪇",
	"loz;": "◊",
	"lrm;": "‎",
	"Lsh;": "↰",
	"lsh;": "↰",
	macr: "¯",
	"Map;": "⤅",
	"map;": "↦",
	"Mcy;": "М",
	"mcy;": "м",
	"Mfr;": "𝔐",
	"mfr;": "𝔪",
	"mho;": "℧",
	"mid;": "∣",
	"nap;": "≉",
	nbsp: " ",
	"Ncy;": "Н",
	"ncy;": "н",
	"Nfr;": "𝔑",
	"nfr;": "𝔫",
	"ngE;": "≧̸",
	"nge;": "≱",
	"nGg;": "⋙̸",
	"nGt;": "≫⃒",
	"ngt;": "≯",
	"nis;": "⋼",
	"niv;": "∋",
	"nlE;": "≦̸",
	"nle;": "≰",
	"nLl;": "⋘̸",
	"nLt;": "≪⃒",
	"nlt;": "≮",
	"Not;": "⫬",
	"not;": "¬",
	"npr;": "⊀",
	"nsc;": "⊁",
	"num;": "#",
	"Ocy;": "О",
	"ocy;": "о",
	"Ofr;": "𝔒",
	"ofr;": "𝔬",
	"ogt;": "⧁",
	"ohm;": "Ω",
	"olt;": "⧀",
	"ord;": "⩝",
	ordf: "ª",
	ordm: "º",
	"orv;": "⩛",
	Ouml: "Ö",
	ouml: "ö",
	"par;": "∥",
	para: "¶",
	"Pcy;": "П",
	"pcy;": "п",
	"Pfr;": "𝔓",
	"pfr;": "𝔭",
	"Phi;": "Φ",
	"phi;": "φ",
	"piv;": "ϖ",
	"prE;": "⪳",
	"pre;": "⪯",
	"Psi;": "Ψ",
	"psi;": "ψ",
	"Qfr;": "𝔔",
	"qfr;": "𝔮",
	QUOT: "\"",
	quot: "\"",
	"Rcy;": "Р",
	"rcy;": "р",
	"REG;": "®",
	"reg;": "®",
	"Rfr;": "ℜ",
	"rfr;": "𝔯",
	"Rho;": "Ρ",
	"rho;": "ρ",
	"rlm;": "‏",
	"Rsh;": "↱",
	"rsh;": "↱",
	"scE;": "⪴",
	"sce;": "⪰",
	"Scy;": "С",
	"scy;": "с",
	sect: "§",
	"Sfr;": "𝔖",
	"sfr;": "𝔰",
	"shy;": "­",
	"sim;": "∼",
	"smt;": "⪪",
	"sol;": "/",
	"squ;": "□",
	"Sub;": "⋐",
	"sub;": "⊂",
	"Sum;": "∑",
	"sum;": "∑",
	"Sup;": "⋑",
	"sup;": "⊃",
	sup1: "¹",
	sup2: "²",
	sup3: "³",
	"Tab;": "\t",
	"Tau;": "Τ",
	"tau;": "τ",
	"Tcy;": "Т",
	"tcy;": "т",
	"Tfr;": "𝔗",
	"tfr;": "𝔱",
	"top;": "⊤",
	"Ucy;": "У",
	"ucy;": "у",
	"Ufr;": "𝔘",
	"ufr;": "𝔲",
	"uml;": "¨",
	Uuml: "Ü",
	uuml: "ü",
	"Vcy;": "В",
	"vcy;": "в",
	"Vee;": "⋁",
	"vee;": "∨",
	"Vfr;": "𝔙",
	"vfr;": "𝔳",
	"Wfr;": "𝔚",
	"wfr;": "𝔴",
	"Xfr;": "𝔛",
	"xfr;": "𝔵",
	"Ycy;": "Ы",
	"ycy;": "ы",
	"yen;": "¥",
	"Yfr;": "𝔜",
	"yfr;": "𝔶",
	yuml: "ÿ",
	"Zcy;": "З",
	"zcy;": "з",
	"Zfr;": "ℨ",
	"zfr;": "𝔷",
	"zwj;": "‍",
	Acirc: "Â",
	acirc: "â",
	acute: "´",
	AElig: "Æ",
	aelig: "æ",
	"andd;": "⩜",
	"andv;": "⩚",
	"ange;": "⦤",
	"Aopf;": "𝔸",
	"aopf;": "𝕒",
	"apid;": "≋",
	"apos;": "'",
	Aring: "Å",
	aring: "å",
	"Ascr;": "𝒜",
	"ascr;": "𝒶",
	"Auml;": "Ä",
	"auml;": "ä",
	"Barv;": "⫧",
	"bbrk;": "⎵",
	"Beta;": "Β",
	"beta;": "β",
	"beth;": "ℶ",
	"bNot;": "⫭",
	"bnot;": "⌐",
	"Bopf;": "𝔹",
	"bopf;": "𝕓",
	"boxH;": "═",
	"boxh;": "─",
	"boxV;": "║",
	"boxv;": "│",
	"Bscr;": "ℬ",
	"bscr;": "𝒷",
	"bsim;": "∽",
	"bsol;": "\\",
	"bull;": "•",
	"bump;": "≎",
	"caps;": "∩︀",
	"Cdot;": "Ċ",
	"cdot;": "ċ",
	cedil: "¸",
	"cent;": "¢",
	"CHcy;": "Ч",
	"chcy;": "ч",
	"circ;": "ˆ",
	"cirE;": "⧃",
	"cire;": "≗",
	"comp;": "∁",
	"cong;": "≅",
	"Copf;": "ℂ",
	"copf;": "𝕔",
	"COPY;": "©",
	"copy;": "©",
	"Cscr;": "𝒞",
	"cscr;": "𝒸",
	"csub;": "⫏",
	"csup;": "⫐",
	"cups;": "∪︀",
	"Darr;": "↡",
	"dArr;": "⇓",
	"darr;": "↓",
	"dash;": "‐",
	"dHar;": "⥥",
	"diam;": "⋄",
	"DJcy;": "Ђ",
	"djcy;": "ђ",
	"Dopf;": "𝔻",
	"dopf;": "𝕕",
	"Dscr;": "𝒟",
	"dscr;": "𝒹",
	"DScy;": "Ѕ",
	"dscy;": "ѕ",
	"dsol;": "⧶",
	"dtri;": "▿",
	"DZcy;": "Џ",
	"dzcy;": "џ",
	"ecir;": "≖",
	Ecirc: "Ê",
	ecirc: "ê",
	"Edot;": "Ė",
	"eDot;": "≑",
	"edot;": "ė",
	"emsp;": " ",
	"ensp;": " ",
	"Eopf;": "𝔼",
	"eopf;": "𝕖",
	"epar;": "⋕",
	"epsi;": "ε",
	"Escr;": "ℰ",
	"escr;": "ℯ",
	"Esim;": "⩳",
	"esim;": "≂",
	"Euml;": "Ë",
	"euml;": "ë",
	"euro;": "€",
	"excl;": "!",
	"flat;": "♭",
	"fnof;": "ƒ",
	"Fopf;": "𝔽",
	"fopf;": "𝕗",
	"fork;": "⋔",
	"Fscr;": "ℱ",
	"fscr;": "𝒻",
	"Gdot;": "Ġ",
	"gdot;": "ġ",
	"geqq;": "≧",
	"gesl;": "⋛︀",
	"GJcy;": "Ѓ",
	"gjcy;": "ѓ",
	"gnap;": "⪊",
	"gneq;": "⪈",
	"Gopf;": "𝔾",
	"gopf;": "𝕘",
	"Gscr;": "𝒢",
	"gscr;": "ℊ",
	"gsim;": "≳",
	"gtcc;": "⪧",
	"gvnE;": "≩︀",
	"half;": "½",
	"hArr;": "⇔",
	"harr;": "↔",
	"hbar;": "ℏ",
	"Hopf;": "ℍ",
	"hopf;": "𝕙",
	"Hscr;": "ℋ",
	"hscr;": "𝒽",
	Icirc: "Î",
	icirc: "î",
	"Idot;": "İ",
	"IEcy;": "Е",
	"iecy;": "е",
	iexcl: "¡",
	"imof;": "⊷",
	"IOcy;": "Ё",
	"iocy;": "ё",
	"Iopf;": "𝕀",
	"iopf;": "𝕚",
	"Iota;": "Ι",
	"iota;": "ι",
	"Iscr;": "ℐ",
	"iscr;": "𝒾",
	"isin;": "∈",
	"Iuml;": "Ï",
	"iuml;": "ï",
	"Jopf;": "𝕁",
	"jopf;": "𝕛",
	"Jscr;": "𝒥",
	"jscr;": "𝒿",
	"KHcy;": "Х",
	"khcy;": "х",
	"KJcy;": "Ќ",
	"kjcy;": "ќ",
	"Kopf;": "𝕂",
	"kopf;": "𝕜",
	"Kscr;": "𝒦",
	"kscr;": "𝓀",
	"Lang;": "⟪",
	"lang;": "⟨",
	laquo: "«",
	"Larr;": "↞",
	"lArr;": "⇐",
	"larr;": "←",
	"late;": "⪭",
	"lcub;": "{",
	"ldca;": "⤶",
	"ldsh;": "↲",
	"leqq;": "≦",
	"lesg;": "⋚︀",
	"lHar;": "⥢",
	"LJcy;": "Љ",
	"ljcy;": "љ",
	"lnap;": "⪉",
	"lneq;": "⪇",
	"Lopf;": "𝕃",
	"lopf;": "𝕝",
	"lozf;": "⧫",
	"lpar;": "(",
	"Lscr;": "ℒ",
	"lscr;": "𝓁",
	"lsim;": "≲",
	"lsqb;": "[",
	"ltcc;": "⪦",
	"ltri;": "◃",
	"lvnE;": "≨︀",
	"macr;": "¯",
	"male;": "♂",
	"malt;": "✠",
	micro: "µ",
	"mlcp;": "⫛",
	"mldr;": "…",
	"Mopf;": "𝕄",
	"mopf;": "𝕞",
	"Mscr;": "ℳ",
	"mscr;": "𝓂",
	"nang;": "∠⃒",
	"napE;": "⩰̸",
	"nbsp;": " ",
	"ncap;": "⩃",
	"ncup;": "⩂",
	"ngeq;": "≱",
	"nges;": "⩾̸",
	"ngtr;": "≯",
	"nGtv;": "≫̸",
	"nisd;": "⋺",
	"NJcy;": "Њ",
	"njcy;": "њ",
	"nldr;": "‥",
	"nleq;": "≰",
	"nles;": "⩽̸",
	"nLtv;": "≪̸",
	"nmid;": "∤",
	"Nopf;": "ℕ",
	"nopf;": "𝕟",
	"npar;": "∦",
	"npre;": "⪯̸",
	"nsce;": "⪰̸",
	"Nscr;": "𝒩",
	"nscr;": "𝓃",
	"nsim;": "≁",
	"nsub;": "⊄",
	"nsup;": "⊅",
	"ntgl;": "≹",
	"ntlg;": "≸",
	"nvap;": "≍⃒",
	"nvge;": "≥⃒",
	"nvgt;": ">⃒",
	"nvle;": "≤⃒",
	"nvlt;": "<⃒",
	"oast;": "⊛",
	"ocir;": "⊚",
	Ocirc: "Ô",
	ocirc: "ô",
	"odiv;": "⨸",
	"odot;": "⊙",
	"ogon;": "˛",
	"oint;": "∮",
	"omid;": "⦶",
	"Oopf;": "𝕆",
	"oopf;": "𝕠",
	"opar;": "⦷",
	"ordf;": "ª",
	"ordm;": "º",
	"oror;": "⩖",
	"Oscr;": "𝒪",
	"oscr;": "ℴ",
	"osol;": "⊘",
	"Ouml;": "Ö",
	"ouml;": "ö",
	"para;": "¶",
	"part;": "∂",
	"perp;": "⊥",
	"phiv;": "ϕ",
	"plus;": "+",
	"Popf;": "ℙ",
	"popf;": "𝕡",
	pound: "£",
	"prap;": "⪷",
	"prec;": "≺",
	"prnE;": "⪵",
	"prod;": "∏",
	"prop;": "∝",
	"Pscr;": "𝒫",
	"pscr;": "𝓅",
	"qint;": "⨌",
	"Qopf;": "ℚ",
	"qopf;": "𝕢",
	"Qscr;": "𝒬",
	"qscr;": "𝓆",
	"QUOT;": "\"",
	"quot;": "\"",
	"race;": "∽̱",
	"Rang;": "⟫",
	"rang;": "⟩",
	raquo: "»",
	"Rarr;": "↠",
	"rArr;": "⇒",
	"rarr;": "→",
	"rcub;": "}",
	"rdca;": "⤷",
	"rdsh;": "↳",
	"real;": "ℜ",
	"rect;": "▭",
	"rHar;": "⥤",
	"rhov;": "ϱ",
	"ring;": "˚",
	"Ropf;": "ℝ",
	"ropf;": "𝕣",
	"rpar;": ")",
	"Rscr;": "ℛ",
	"rscr;": "𝓇",
	"rsqb;": "]",
	"rtri;": "▹",
	"scap;": "⪸",
	"scnE;": "⪶",
	"sdot;": "⋅",
	"sect;": "§",
	"semi;": ";",
	"sext;": "✶",
	"SHcy;": "Ш",
	"shcy;": "ш",
	"sime;": "≃",
	"simg;": "⪞",
	"siml;": "⪝",
	"smid;": "∣",
	"smte;": "⪬",
	"solb;": "⧄",
	"Sopf;": "𝕊",
	"sopf;": "𝕤",
	"spar;": "∥",
	"Sqrt;": "√",
	"squf;": "▪",
	"Sscr;": "𝒮",
	"sscr;": "𝓈",
	"Star;": "⋆",
	"star;": "☆",
	"subE;": "⫅",
	"sube;": "⊆",
	"succ;": "≻",
	"sung;": "♪",
	"sup1;": "¹",
	"sup2;": "²",
	"sup3;": "³",
	"supE;": "⫆",
	"supe;": "⊇",
	szlig: "ß",
	"tbrk;": "⎴",
	"tdot;": "⃛",
	THORN: "Þ",
	thorn: "þ",
	times: "×",
	"tint;": "∭",
	"toea;": "⤨",
	"Topf;": "𝕋",
	"topf;": "𝕥",
	"tosa;": "⤩",
	"trie;": "≜",
	"Tscr;": "𝒯",
	"tscr;": "𝓉",
	"TScy;": "Ц",
	"tscy;": "ц",
	"Uarr;": "↟",
	"uArr;": "⇑",
	"uarr;": "↑",
	Ucirc: "Û",
	ucirc: "û",
	"uHar;": "⥣",
	"Uopf;": "𝕌",
	"uopf;": "𝕦",
	"Upsi;": "ϒ",
	"upsi;": "υ",
	"Uscr;": "𝒰",
	"uscr;": "𝓊",
	"utri;": "▵",
	"Uuml;": "Ü",
	"uuml;": "ü",
	"vArr;": "⇕",
	"varr;": "↕",
	"Vbar;": "⫫",
	"vBar;": "⫨",
	"Vert;": "‖",
	"vert;": "|",
	"Vopf;": "𝕍",
	"vopf;": "𝕧",
	"Vscr;": "𝒱",
	"vscr;": "𝓋",
	"Wopf;": "𝕎",
	"wopf;": "𝕨",
	"Wscr;": "𝒲",
	"wscr;": "𝓌",
	"xcap;": "⋂",
	"xcup;": "⋃",
	"xmap;": "⟼",
	"xnis;": "⋻",
	"Xopf;": "𝕏",
	"xopf;": "𝕩",
	"Xscr;": "𝒳",
	"xscr;": "𝓍",
	"xvee;": "⋁",
	"YAcy;": "Я",
	"yacy;": "я",
	"YIcy;": "Ї",
	"yicy;": "ї",
	"Yopf;": "𝕐",
	"yopf;": "𝕪",
	"Yscr;": "𝒴",
	"yscr;": "𝓎",
	"YUcy;": "Ю",
	"yucy;": "ю",
	"Yuml;": "Ÿ",
	"yuml;": "ÿ",
	"Zdot;": "Ż",
	"zdot;": "ż",
	"Zeta;": "Ζ",
	"zeta;": "ζ",
	"ZHcy;": "Ж",
	"zhcy;": "ж",
	"Zopf;": "ℤ",
	"zopf;": "𝕫",
	"Zscr;": "𝒵",
	"zscr;": "𝓏",
	"zwnj;": "‌",
	Aacute: "Á",
	aacute: "á",
	"Acirc;": "Â",
	"acirc;": "â",
	"acute;": "´",
	"AElig;": "Æ",
	"aelig;": "æ",
	Agrave: "À",
	agrave: "à",
	"aleph;": "ℵ",
	"Alpha;": "Α",
	"alpha;": "α",
	"Amacr;": "Ā",
	"amacr;": "ā",
	"amalg;": "⨿",
	"angle;": "∠",
	"angrt;": "∟",
	"angst;": "Å",
	"Aogon;": "Ą",
	"aogon;": "ą",
	"Aring;": "Å",
	"aring;": "å",
	"asymp;": "≈",
	Atilde: "Ã",
	atilde: "ã",
	"awint;": "⨑",
	"bcong;": "≌",
	"bdquo;": "„",
	"bepsi;": "϶",
	"blank;": "␣",
	"blk12;": "▒",
	"blk14;": "░",
	"blk34;": "▓",
	"block;": "█",
	"boxDL;": "╗",
	"boxDl;": "╖",
	"boxdL;": "╕",
	"boxdl;": "┐",
	"boxDR;": "╔",
	"boxDr;": "╓",
	"boxdR;": "╒",
	"boxdr;": "┌",
	"boxHD;": "╦",
	"boxHd;": "╤",
	"boxhD;": "╥",
	"boxhd;": "┬",
	"boxHU;": "╩",
	"boxHu;": "╧",
	"boxhU;": "╨",
	"boxhu;": "┴",
	"boxUL;": "╝",
	"boxUl;": "╜",
	"boxuL;": "╛",
	"boxul;": "┘",
	"boxUR;": "╚",
	"boxUr;": "╙",
	"boxuR;": "╘",
	"boxur;": "└",
	"boxVH;": "╬",
	"boxVh;": "╫",
	"boxvH;": "╪",
	"boxvh;": "┼",
	"boxVL;": "╣",
	"boxVl;": "╢",
	"boxvL;": "╡",
	"boxvl;": "┤",
	"boxVR;": "╠",
	"boxVr;": "╟",
	"boxvR;": "╞",
	"boxvr;": "├",
	"Breve;": "˘",
	"breve;": "˘",
	brvbar: "¦",
	"bsemi;": "⁏",
	"bsime;": "⋍",
	"bsolb;": "⧅",
	"bumpE;": "⪮",
	"bumpe;": "≏",
	"caret;": "⁁",
	"caron;": "ˇ",
	"ccaps;": "⩍",
	Ccedil: "Ç",
	ccedil: "ç",
	"Ccirc;": "Ĉ",
	"ccirc;": "ĉ",
	"ccups;": "⩌",
	"cedil;": "¸",
	"check;": "✓",
	"clubs;": "♣",
	"Colon;": "∷",
	"colon;": ":",
	"comma;": ",",
	"crarr;": "↵",
	"Cross;": "⨯",
	"cross;": "✗",
	"csube;": "⫑",
	"csupe;": "⫒",
	"ctdot;": "⋯",
	"cuepr;": "⋞",
	"cuesc;": "⋟",
	"cupor;": "⩅",
	curren: "¤",
	"cuvee;": "⋎",
	"cuwed;": "⋏",
	"cwint;": "∱",
	"Dashv;": "⫤",
	"dashv;": "⊣",
	"dblac;": "˝",
	"ddarr;": "⇊",
	"Delta;": "Δ",
	"delta;": "δ",
	"dharl;": "⇃",
	"dharr;": "⇂",
	"diams;": "♦",
	"disin;": "⋲",
	divide: "÷",
	"doteq;": "≐",
	"dtdot;": "⋱",
	"dtrif;": "▾",
	"duarr;": "⇵",
	"duhar;": "⥯",
	Eacute: "É",
	eacute: "é",
	"Ecirc;": "Ê",
	"ecirc;": "ê",
	"eDDot;": "⩷",
	"efDot;": "≒",
	Egrave: "È",
	egrave: "è",
	"Emacr;": "Ē",
	"emacr;": "ē",
	"empty;": "∅",
	"Eogon;": "Ę",
	"eogon;": "ę",
	"eplus;": "⩱",
	"epsiv;": "ϵ",
	"eqsim;": "≂",
	"Equal;": "⩵",
	"equiv;": "≡",
	"erarr;": "⥱",
	"erDot;": "≓",
	"esdot;": "≐",
	"exist;": "∃",
	"fflig;": "ff",
	"filig;": "fi",
	"fjlig;": "fj",
	"fllig;": "fl",
	"fltns;": "▱",
	"forkv;": "⫙",
	frac12: "½",
	frac14: "¼",
	frac34: "¾",
	"frasl;": "⁄",
	"frown;": "⌢",
	"Gamma;": "Γ",
	"gamma;": "γ",
	"Gcirc;": "Ĝ",
	"gcirc;": "ĝ",
	"gescc;": "⪩",
	"gimel;": "ℷ",
	"gneqq;": "≩",
	"gnsim;": "⋧",
	"grave;": "`",
	"gsime;": "⪎",
	"gsiml;": "⪐",
	"gtcir;": "⩺",
	"gtdot;": "⋗",
	"Hacek;": "ˇ",
	"harrw;": "↭",
	"Hcirc;": "Ĥ",
	"hcirc;": "ĥ",
	"hoarr;": "⇿",
	Iacute: "Í",
	iacute: "í",
	"Icirc;": "Î",
	"icirc;": "î",
	"iexcl;": "¡",
	Igrave: "Ì",
	igrave: "ì",
	"iiint;": "∭",
	"iiota;": "℩",
	"IJlig;": "IJ",
	"ijlig;": "ij",
	"Imacr;": "Ī",
	"imacr;": "ī",
	"image;": "ℑ",
	"imath;": "ı",
	"imped;": "Ƶ",
	"infin;": "∞",
	"Iogon;": "Į",
	"iogon;": "į",
	"iprod;": "⨼",
	iquest: "¿",
	"isinE;": "⋹",
	"isins;": "⋴",
	"isinv;": "∈",
	"Iukcy;": "І",
	"iukcy;": "і",
	"Jcirc;": "Ĵ",
	"jcirc;": "ĵ",
	"jmath;": "ȷ",
	"Jukcy;": "Є",
	"jukcy;": "є",
	"Kappa;": "Κ",
	"kappa;": "κ",
	"lAarr;": "⇚",
	"langd;": "⦑",
	"laquo;": "«",
	"larrb;": "⇤",
	"lates;": "⪭︀",
	"lBarr;": "⤎",
	"lbarr;": "⤌",
	"lbbrk;": "❲",
	"lbrke;": "⦋",
	"lceil;": "⌈",
	"ldquo;": "“",
	"lescc;": "⪨",
	"lhard;": "↽",
	"lharu;": "↼",
	"lhblk;": "▄",
	"llarr;": "⇇",
	"lltri;": "◺",
	"lneqq;": "≨",
	"lnsim;": "⋦",
	"loang;": "⟬",
	"loarr;": "⇽",
	"lobrk;": "⟦",
	"lopar;": "⦅",
	"lrarr;": "⇆",
	"lrhar;": "⇋",
	"lrtri;": "⊿",
	"lsime;": "⪍",
	"lsimg;": "⪏",
	"lsquo;": "‘",
	"ltcir;": "⩹",
	"ltdot;": "⋖",
	"ltrie;": "⊴",
	"ltrif;": "◂",
	"mdash;": "—",
	"mDDot;": "∺",
	"micro;": "µ",
	middot: "·",
	"minus;": "−",
	"mumap;": "⊸",
	"nabla;": "∇",
	"napid;": "≋̸",
	"napos;": "ʼn",
	"natur;": "♮",
	"nbump;": "≎̸",
	"ncong;": "≇",
	"ndash;": "–",
	"neArr;": "⇗",
	"nearr;": "↗",
	"nedot;": "≐̸",
	"nesim;": "≂̸",
	"ngeqq;": "≧̸",
	"ngsim;": "≵",
	"nhArr;": "⇎",
	"nharr;": "↮",
	"nhpar;": "⫲",
	"nlArr;": "⇍",
	"nlarr;": "↚",
	"nleqq;": "≦̸",
	"nless;": "≮",
	"nlsim;": "≴",
	"nltri;": "⋪",
	"notin;": "∉",
	"notni;": "∌",
	"npart;": "∂̸",
	"nprec;": "⊀",
	"nrArr;": "⇏",
	"nrarr;": "↛",
	"nrtri;": "⋫",
	"nsime;": "≄",
	"nsmid;": "∤",
	"nspar;": "∦",
	"nsubE;": "⫅̸",
	"nsube;": "⊈",
	"nsucc;": "⊁",
	"nsupE;": "⫆̸",
	"nsupe;": "⊉",
	Ntilde: "Ñ",
	ntilde: "ñ",
	"numsp;": " ",
	"nvsim;": "∼⃒",
	"nwArr;": "⇖",
	"nwarr;": "↖",
	Oacute: "Ó",
	oacute: "ó",
	"Ocirc;": "Ô",
	"ocirc;": "ô",
	"odash;": "⊝",
	"OElig;": "Œ",
	"oelig;": "œ",
	"ofcir;": "⦿",
	Ograve: "Ò",
	ograve: "ò",
	"ohbar;": "⦵",
	"olarr;": "↺",
	"olcir;": "⦾",
	"oline;": "‾",
	"Omacr;": "Ō",
	"omacr;": "ō",
	"Omega;": "Ω",
	"omega;": "ω",
	"operp;": "⦹",
	"oplus;": "⊕",
	"orarr;": "↻",
	"order;": "ℴ",
	Oslash: "Ø",
	oslash: "ø",
	Otilde: "Õ",
	otilde: "õ",
	"ovbar;": "⌽",
	"parsl;": "⫽",
	"phone;": "☎",
	"plusb;": "⊞",
	"pluse;": "⩲",
	plusmn: "±",
	"pound;": "£",
	"prcue;": "≼",
	"Prime;": "″",
	"prime;": "′",
	"prnap;": "⪹",
	"prsim;": "≾",
	"quest;": "?",
	"rAarr;": "⇛",
	"radic;": "√",
	"rangd;": "⦒",
	"range;": "⦥",
	"raquo;": "»",
	"rarrb;": "⇥",
	"rarrc;": "⤳",
	"rarrw;": "↝",
	"ratio;": "∶",
	"RBarr;": "⤐",
	"rBarr;": "⤏",
	"rbarr;": "⤍",
	"rbbrk;": "❳",
	"rbrke;": "⦌",
	"rceil;": "⌉",
	"rdquo;": "”",
	"reals;": "ℝ",
	"rhard;": "⇁",
	"rharu;": "⇀",
	"rlarr;": "⇄",
	"rlhar;": "⇌",
	"rnmid;": "⫮",
	"roang;": "⟭",
	"roarr;": "⇾",
	"robrk;": "⟧",
	"ropar;": "⦆",
	"rrarr;": "⇉",
	"rsquo;": "’",
	"rtrie;": "⊵",
	"rtrif;": "▸",
	"sbquo;": "‚",
	"sccue;": "≽",
	"Scirc;": "Ŝ",
	"scirc;": "ŝ",
	"scnap;": "⪺",
	"scsim;": "≿",
	"sdotb;": "⊡",
	"sdote;": "⩦",
	"seArr;": "⇘",
	"searr;": "↘",
	"setmn;": "∖",
	"sharp;": "♯",
	"Sigma;": "Σ",
	"sigma;": "σ",
	"simeq;": "≃",
	"simgE;": "⪠",
	"simlE;": "⪟",
	"simne;": "≆",
	"slarr;": "←",
	"smile;": "⌣",
	"smtes;": "⪬︀",
	"sqcap;": "⊓",
	"sqcup;": "⊔",
	"sqsub;": "⊏",
	"sqsup;": "⊐",
	"srarr;": "→",
	"starf;": "★",
	"strns;": "¯",
	"subnE;": "⫋",
	"subne;": "⊊",
	"supnE;": "⫌",
	"supne;": "⊋",
	"swArr;": "⇙",
	"swarr;": "↙",
	"szlig;": "ß",
	"Theta;": "Θ",
	"theta;": "θ",
	"thkap;": "≈",
	"THORN;": "Þ",
	"thorn;": "þ",
	"Tilde;": "∼",
	"tilde;": "˜",
	"times;": "×",
	"TRADE;": "™",
	"trade;": "™",
	"trisb;": "⧍",
	"TSHcy;": "Ћ",
	"tshcy;": "ћ",
	"twixt;": "≬",
	Uacute: "Ú",
	uacute: "ú",
	"Ubrcy;": "Ў",
	"ubrcy;": "ў",
	"Ucirc;": "Û",
	"ucirc;": "û",
	"udarr;": "⇅",
	"udhar;": "⥮",
	Ugrave: "Ù",
	ugrave: "ù",
	"uharl;": "↿",
	"uharr;": "↾",
	"uhblk;": "▀",
	"ultri;": "◸",
	"Umacr;": "Ū",
	"umacr;": "ū",
	"Union;": "⋃",
	"Uogon;": "Ų",
	"uogon;": "ų",
	"uplus;": "⊎",
	"upsih;": "ϒ",
	"UpTee;": "⊥",
	"Uring;": "Ů",
	"uring;": "ů",
	"urtri;": "◹",
	"utdot;": "⋰",
	"utrif;": "▴",
	"uuarr;": "⇈",
	"varpi;": "ϖ",
	"vBarv;": "⫩",
	"VDash;": "⊫",
	"Vdash;": "⊩",
	"vDash;": "⊨",
	"vdash;": "⊢",
	"veeeq;": "≚",
	"vltri;": "⊲",
	"vnsub;": "⊂⃒",
	"vnsup;": "⊃⃒",
	"vprop;": "∝",
	"vrtri;": "⊳",
	"Wcirc;": "Ŵ",
	"wcirc;": "ŵ",
	"Wedge;": "⋀",
	"wedge;": "∧",
	"xcirc;": "◯",
	"xdtri;": "▽",
	"xhArr;": "⟺",
	"xharr;": "⟷",
	"xlArr;": "⟸",
	"xlarr;": "⟵",
	"xodot;": "⨀",
	"xrArr;": "⟹",
	"xrarr;": "⟶",
	"xutri;": "△",
	Yacute: "Ý",
	yacute: "ý",
	"Ycirc;": "Ŷ",
	"ycirc;": "ŷ",
	"Aacute;": "Á",
	"aacute;": "á",
	"Abreve;": "Ă",
	"abreve;": "ă",
	"Agrave;": "À",
	"agrave;": "à",
	"andand;": "⩕",
	"angmsd;": "∡",
	"angsph;": "∢",
	"apacir;": "⩯",
	"approx;": "≈",
	"Assign;": "≔",
	"Atilde;": "Ã",
	"atilde;": "ã",
	"barvee;": "⊽",
	"Barwed;": "⌆",
	"barwed;": "⌅",
	"becaus;": "∵",
	"bernou;": "ℬ",
	"bigcap;": "⋂",
	"bigcup;": "⋃",
	"bigvee;": "⋁",
	"bkarow;": "⤍",
	"bottom;": "⊥",
	"bowtie;": "⋈",
	"boxbox;": "⧉",
	"bprime;": "‵",
	"brvbar;": "¦",
	"bullet;": "•",
	"Bumpeq;": "≎",
	"bumpeq;": "≏",
	"Cacute;": "Ć",
	"cacute;": "ć",
	"capand;": "⩄",
	"capcap;": "⩋",
	"capcup;": "⩇",
	"capdot;": "⩀",
	"Ccaron;": "Č",
	"ccaron;": "č",
	"Ccedil;": "Ç",
	"ccedil;": "ç",
	"circeq;": "≗",
	"cirmid;": "⫯",
	"Colone;": "⩴",
	"colone;": "≔",
	"commat;": "@",
	"compfn;": "∘",
	"Conint;": "∯",
	"conint;": "∮",
	"coprod;": "∐",
	"copysr;": "℗",
	"cularr;": "↶",
	"CupCap;": "≍",
	"cupcap;": "⩆",
	"cupcup;": "⩊",
	"cupdot;": "⊍",
	"curarr;": "↷",
	"curren;": "¤",
	"cylcty;": "⌭",
	"Dagger;": "‡",
	"dagger;": "†",
	"daleth;": "ℸ",
	"Dcaron;": "Ď",
	"dcaron;": "ď",
	"dfisht;": "⥿",
	"divide;": "÷",
	"divonx;": "⋇",
	"dlcorn;": "⌞",
	"dlcrop;": "⌍",
	"dollar;": "$",
	"DotDot;": "⃜",
	"drcorn;": "⌟",
	"drcrop;": "⌌",
	"Dstrok;": "Đ",
	"dstrok;": "đ",
	"Eacute;": "É",
	"eacute;": "é",
	"easter;": "⩮",
	"Ecaron;": "Ě",
	"ecaron;": "ě",
	"ecolon;": "≕",
	"Egrave;": "È",
	"egrave;": "è",
	"egsdot;": "⪘",
	"elsdot;": "⪗",
	"emptyv;": "∅",
	"emsp13;": " ",
	"emsp14;": " ",
	"eparsl;": "⧣",
	"eqcirc;": "≖",
	"equals;": "=",
	"equest;": "≟",
	"Exists;": "∃",
	"female;": "♀",
	"ffilig;": "ffi",
	"ffllig;": "ffl",
	"ForAll;": "∀",
	"forall;": "∀",
	"frac12;": "½",
	"frac13;": "⅓",
	"frac14;": "¼",
	"frac15;": "⅕",
	"frac16;": "⅙",
	"frac18;": "⅛",
	"frac23;": "⅔",
	"frac25;": "⅖",
	"frac34;": "¾",
	"frac35;": "⅗",
	"frac38;": "⅜",
	"frac45;": "⅘",
	"frac56;": "⅚",
	"frac58;": "⅝",
	"frac78;": "⅞",
	"gacute;": "ǵ",
	"Gammad;": "Ϝ",
	"gammad;": "ϝ",
	"Gbreve;": "Ğ",
	"gbreve;": "ğ",
	"Gcedil;": "Ģ",
	"gesdot;": "⪀",
	"gesles;": "⪔",
	"gtlPar;": "⦕",
	"gtrarr;": "⥸",
	"gtrdot;": "⋗",
	"gtrsim;": "≳",
	"hairsp;": " ",
	"hamilt;": "ℋ",
	"HARDcy;": "Ъ",
	"hardcy;": "ъ",
	"hearts;": "♥",
	"hellip;": "…",
	"hercon;": "⊹",
	"homtht;": "∻",
	"horbar;": "―",
	"hslash;": "ℏ",
	"Hstrok;": "Ħ",
	"hstrok;": "ħ",
	"hybull;": "⁃",
	"hyphen;": "‐",
	"Iacute;": "Í",
	"iacute;": "í",
	"Igrave;": "Ì",
	"igrave;": "ì",
	"iiiint;": "⨌",
	"iinfin;": "⧜",
	"incare;": "℅",
	"inodot;": "ı",
	"intcal;": "⊺",
	"iquest;": "¿",
	"isinsv;": "⋳",
	"Itilde;": "Ĩ",
	"itilde;": "ĩ",
	"Jsercy;": "Ј",
	"jsercy;": "ј",
	"kappav;": "ϰ",
	"Kcedil;": "Ķ",
	"kcedil;": "ķ",
	"kgreen;": "ĸ",
	"Lacute;": "Ĺ",
	"lacute;": "ĺ",
	"lagran;": "ℒ",
	"Lambda;": "Λ",
	"lambda;": "λ",
	"langle;": "⟨",
	"larrfs;": "⤝",
	"larrhk;": "↩",
	"larrlp;": "↫",
	"larrpl;": "⤹",
	"larrtl;": "↢",
	"lAtail;": "⤛",
	"latail;": "⤙",
	"lbrace;": "{",
	"lbrack;": "[",
	"Lcaron;": "Ľ",
	"lcaron;": "ľ",
	"Lcedil;": "Ļ",
	"lcedil;": "ļ",
	"ldquor;": "„",
	"lesdot;": "⩿",
	"lesges;": "⪓",
	"lfisht;": "⥼",
	"lfloor;": "⌊",
	"lharul;": "⥪",
	"llhard;": "⥫",
	"Lmidot;": "Ŀ",
	"lmidot;": "ŀ",
	"lmoust;": "⎰",
	"loplus;": "⨭",
	"lowast;": "∗",
	"lowbar;": "_",
	"lparlt;": "⦓",
	"lrhard;": "⥭",
	"lsaquo;": "‹",
	"lsquor;": "‚",
	"Lstrok;": "Ł",
	"lstrok;": "ł",
	"lthree;": "⋋",
	"ltimes;": "⋉",
	"ltlarr;": "⥶",
	"ltrPar;": "⦖",
	"mapsto;": "↦",
	"marker;": "▮",
	"mcomma;": "⨩",
	"midast;": "*",
	"midcir;": "⫰",
	"middot;": "·",
	"minusb;": "⊟",
	"minusd;": "∸",
	"mnplus;": "∓",
	"models;": "⊧",
	"mstpos;": "∾",
	"Nacute;": "Ń",
	"nacute;": "ń",
	"nbumpe;": "≏̸",
	"Ncaron;": "Ň",
	"ncaron;": "ň",
	"Ncedil;": "Ņ",
	"ncedil;": "ņ",
	"nearhk;": "⤤",
	"nequiv;": "≢",
	"nesear;": "⤨",
	"nexist;": "∄",
	"nltrie;": "⋬",
	"notinE;": "⋹̸",
	"nparsl;": "⫽⃥",
	"nprcue;": "⋠",
	"nrarrc;": "⤳̸",
	"nrarrw;": "↝̸",
	"nrtrie;": "⋭",
	"nsccue;": "⋡",
	"nsimeq;": "≄",
	"Ntilde;": "Ñ",
	"ntilde;": "ñ",
	"numero;": "№",
	"nVDash;": "⊯",
	"nVdash;": "⊮",
	"nvDash;": "⊭",
	"nvdash;": "⊬",
	"nvHarr;": "⤄",
	"nvlArr;": "⤂",
	"nvrArr;": "⤃",
	"nwarhk;": "⤣",
	"nwnear;": "⤧",
	"Oacute;": "Ó",
	"oacute;": "ó",
	"Odblac;": "Ő",
	"odblac;": "ő",
	"odsold;": "⦼",
	"Ograve;": "Ò",
	"ograve;": "ò",
	"ominus;": "⊖",
	"origof;": "⊶",
	"Oslash;": "Ø",
	"oslash;": "ø",
	"Otilde;": "Õ",
	"otilde;": "õ",
	"Otimes;": "⨷",
	"otimes;": "⊗",
	"parsim;": "⫳",
	"percnt;": "%",
	"period;": ".",
	"permil;": "‰",
	"phmmat;": "ℳ",
	"planck;": "ℏ",
	"plankv;": "ℏ",
	"plusdo;": "∔",
	"plusdu;": "⨥",
	"plusmn;": "±",
	"preceq;": "⪯",
	"primes;": "ℙ",
	"prnsim;": "⋨",
	"propto;": "∝",
	"prurel;": "⊰",
	"puncsp;": " ",
	"qprime;": "⁗",
	"Racute;": "Ŕ",
	"racute;": "ŕ",
	"rangle;": "⟩",
	"rarrap;": "⥵",
	"rarrfs;": "⤞",
	"rarrhk;": "↪",
	"rarrlp;": "↬",
	"rarrpl;": "⥅",
	"Rarrtl;": "⤖",
	"rarrtl;": "↣",
	"rAtail;": "⤜",
	"ratail;": "⤚",
	"rbrace;": "}",
	"rbrack;": "]",
	"Rcaron;": "Ř",
	"rcaron;": "ř",
	"Rcedil;": "Ŗ",
	"rcedil;": "ŗ",
	"rdquor;": "”",
	"rfisht;": "⥽",
	"rfloor;": "⌋",
	"rharul;": "⥬",
	"rmoust;": "⎱",
	"roplus;": "⨮",
	"rpargt;": "⦔",
	"rsaquo;": "›",
	"rsquor;": "’",
	"rthree;": "⋌",
	"rtimes;": "⋊",
	"Sacute;": "Ś",
	"sacute;": "ś",
	"Scaron;": "Š",
	"scaron;": "š",
	"Scedil;": "Ş",
	"scedil;": "ş",
	"scnsim;": "⋩",
	"searhk;": "⤥",
	"seswar;": "⤩",
	"sfrown;": "⌢",
	"SHCHcy;": "Щ",
	"shchcy;": "щ",
	"sigmaf;": "ς",
	"sigmav;": "ς",
	"simdot;": "⩪",
	"smashp;": "⨳",
	"SOFTcy;": "Ь",
	"softcy;": "ь",
	"solbar;": "⌿",
	"spades;": "♠",
	"sqcaps;": "⊓︀",
	"sqcups;": "⊔︀",
	"sqsube;": "⊑",
	"sqsupe;": "⊒",
	"Square;": "□",
	"square;": "□",
	"squarf;": "▪",
	"ssetmn;": "∖",
	"ssmile;": "⌣",
	"sstarf;": "⋆",
	"subdot;": "⪽",
	"Subset;": "⋐",
	"subset;": "⊂",
	"subsim;": "⫇",
	"subsub;": "⫕",
	"subsup;": "⫓",
	"succeq;": "⪰",
	"supdot;": "⪾",
	"Supset;": "⋑",
	"supset;": "⊃",
	"supsim;": "⫈",
	"supsub;": "⫔",
	"supsup;": "⫖",
	"swarhk;": "⤦",
	"swnwar;": "⤪",
	"target;": "⌖",
	"Tcaron;": "Ť",
	"tcaron;": "ť",
	"Tcedil;": "Ţ",
	"tcedil;": "ţ",
	"telrec;": "⌕",
	"there4;": "∴",
	"thetav;": "ϑ",
	"thinsp;": " ",
	"thksim;": "∼",
	"timesb;": "⊠",
	"timesd;": "⨰",
	"topbot;": "⌶",
	"topcir;": "⫱",
	"tprime;": "‴",
	"tridot;": "◬",
	"Tstrok;": "Ŧ",
	"tstrok;": "ŧ",
	"Uacute;": "Ú",
	"uacute;": "ú",
	"Ubreve;": "Ŭ",
	"ubreve;": "ŭ",
	"Udblac;": "Ű",
	"udblac;": "ű",
	"ufisht;": "⥾",
	"Ugrave;": "Ù",
	"ugrave;": "ù",
	"ulcorn;": "⌜",
	"ulcrop;": "⌏",
	"urcorn;": "⌝",
	"urcrop;": "⌎",
	"Utilde;": "Ũ",
	"utilde;": "ũ",
	"vangrt;": "⦜",
	"varphi;": "ϕ",
	"varrho;": "ϱ",
	"Vdashl;": "⫦",
	"veebar;": "⊻",
	"vellip;": "⋮",
	"Verbar;": "‖",
	"verbar;": "|",
	"vsubnE;": "⫋︀",
	"vsubne;": "⊊︀",
	"vsupnE;": "⫌︀",
	"vsupne;": "⊋︀",
	"Vvdash;": "⊪",
	"wedbar;": "⩟",
	"wedgeq;": "≙",
	"weierp;": "℘",
	"wreath;": "≀",
	"xoplus;": "⨁",
	"xotime;": "⨂",
	"xsqcup;": "⨆",
	"xuplus;": "⨄",
	"xwedge;": "⋀",
	"Yacute;": "Ý",
	"yacute;": "ý",
	"Zacute;": "Ź",
	"zacute;": "ź",
	"Zcaron;": "Ž",
	"zcaron;": "ž",
	"zeetrf;": "ℨ",
	"alefsym;": "ℵ",
	"angrtvb;": "⊾",
	"angzarr;": "⍼",
	"asympeq;": "≍",
	"backsim;": "∽",
	"Because;": "∵",
	"because;": "∵",
	"bemptyv;": "⦰",
	"between;": "≬",
	"bigcirc;": "◯",
	"bigodot;": "⨀",
	"bigstar;": "★",
	"bnequiv;": "≡⃥",
	"boxplus;": "⊞",
	"Cayleys;": "ℭ",
	"Cconint;": "∰",
	"ccupssm;": "⩐",
	"Cedilla;": "¸",
	"cemptyv;": "⦲",
	"cirscir;": "⧂",
	"coloneq;": "≔",
	"congdot;": "⩭",
	"cudarrl;": "⤸",
	"cudarrr;": "⤵",
	"cularrp;": "⤽",
	"curarrm;": "⤼",
	"dbkarow;": "⤏",
	"ddagger;": "‡",
	"ddotseq;": "⩷",
	"demptyv;": "⦱",
	"Diamond;": "⋄",
	"diamond;": "⋄",
	"digamma;": "ϝ",
	"dotplus;": "∔",
	"DownTee;": "⊤",
	"dwangle;": "⦦",
	"Element;": "∈",
	"Epsilon;": "Ε",
	"epsilon;": "ε",
	"eqcolon;": "≕",
	"equivDD;": "⩸",
	"gesdoto;": "⪂",
	"gtquest;": "⩼",
	"gtrless;": "≷",
	"harrcir;": "⥈",
	"Implies;": "⇒",
	"intprod;": "⨼",
	"isindot;": "⋵",
	"larrbfs;": "⤟",
	"larrsim;": "⥳",
	"lbrksld;": "⦏",
	"lbrkslu;": "⦍",
	"ldrdhar;": "⥧",
	"LeftTee;": "⊣",
	"lesdoto;": "⪁",
	"lessdot;": "⋖",
	"lessgtr;": "≶",
	"lesssim;": "≲",
	"lotimes;": "⨴",
	"lozenge;": "◊",
	"ltquest;": "⩻",
	"luruhar;": "⥦",
	"maltese;": "✠",
	"minusdu;": "⨪",
	"napprox;": "≉",
	"natural;": "♮",
	"nearrow;": "↗",
	"NewLine;": "\n",
	"nexists;": "∄",
	"NoBreak;": "⁠",
	"notinva;": "∉",
	"notinvb;": "⋷",
	"notinvc;": "⋶",
	"NotLess;": "≮",
	"notniva;": "∌",
	"notnivb;": "⋾",
	"notnivc;": "⋽",
	"npolint;": "⨔",
	"npreceq;": "⪯̸",
	"nsqsube;": "⋢",
	"nsqsupe;": "⋣",
	"nsubset;": "⊂⃒",
	"nsucceq;": "⪰̸",
	"nsupset;": "⊃⃒",
	"nvinfin;": "⧞",
	"nvltrie;": "⊴⃒",
	"nvrtrie;": "⊵⃒",
	"nwarrow;": "↖",
	"olcross;": "⦻",
	"Omicron;": "Ο",
	"omicron;": "ο",
	"orderof;": "ℴ",
	"orslope;": "⩗",
	"OverBar;": "‾",
	"pertenk;": "‱",
	"planckh;": "ℎ",
	"pluscir;": "⨢",
	"plussim;": "⨦",
	"plustwo;": "⨧",
	"precsim;": "≾",
	"Product;": "∏",
	"quatint;": "⨖",
	"questeq;": "≟",
	"rarrbfs;": "⤠",
	"rarrsim;": "⥴",
	"rbrksld;": "⦎",
	"rbrkslu;": "⦐",
	"rdldhar;": "⥩",
	"realine;": "ℛ",
	"rotimes;": "⨵",
	"ruluhar;": "⥨",
	"searrow;": "↘",
	"simplus;": "⨤",
	"simrarr;": "⥲",
	"subedot;": "⫃",
	"submult;": "⫁",
	"subplus;": "⪿",
	"subrarr;": "⥹",
	"succsim;": "≿",
	"supdsub;": "⫘",
	"supedot;": "⫄",
	"suphsol;": "⟉",
	"suphsub;": "⫗",
	"suplarr;": "⥻",
	"supmult;": "⫂",
	"supplus;": "⫀",
	"swarrow;": "↙",
	"topfork;": "⫚",
	"triplus;": "⨹",
	"tritime;": "⨻",
	"UpArrow;": "↑",
	"Uparrow;": "⇑",
	"uparrow;": "↑",
	"Upsilon;": "Υ",
	"upsilon;": "υ",
	"uwangle;": "⦧",
	"vzigzag;": "⦚",
	"zigrarr;": "⇝",
	"andslope;": "⩘",
	"angmsdaa;": "⦨",
	"angmsdab;": "⦩",
	"angmsdac;": "⦪",
	"angmsdad;": "⦫",
	"angmsdae;": "⦬",
	"angmsdaf;": "⦭",
	"angmsdag;": "⦮",
	"angmsdah;": "⦯",
	"angrtvbd;": "⦝",
	"approxeq;": "≊",
	"awconint;": "∳",
	"backcong;": "≌",
	"barwedge;": "⌅",
	"bbrktbrk;": "⎶",
	"bigoplus;": "⨁",
	"bigsqcup;": "⨆",
	"biguplus;": "⨄",
	"bigwedge;": "⋀",
	"boxminus;": "⊟",
	"boxtimes;": "⊠",
	"bsolhsub;": "⟈",
	"capbrcup;": "⩉",
	"circledR;": "®",
	"circledS;": "Ⓢ",
	"cirfnint;": "⨐",
	"clubsuit;": "♣",
	"cupbrcap;": "⩈",
	"curlyvee;": "⋎",
	"cwconint;": "∲",
	"DDotrahd;": "⤑",
	"doteqdot;": "≑",
	"DotEqual;": "≐",
	"dotminus;": "∸",
	"drbkarow;": "⤐",
	"dzigrarr;": "⟿",
	"elinters;": "⏧",
	"emptyset;": "∅",
	"eqvparsl;": "⧥",
	"fpartint;": "⨍",
	"geqslant;": "⩾",
	"gesdotol;": "⪄",
	"gnapprox;": "⪊",
	"hksearow;": "⤥",
	"hkswarow;": "⤦",
	"imagline;": "ℐ",
	"imagpart;": "ℑ",
	"infintie;": "⧝",
	"integers;": "ℤ",
	"Integral;": "∫",
	"intercal;": "⊺",
	"intlarhk;": "⨗",
	"laemptyv;": "⦴",
	"ldrushar;": "⥋",
	"leqslant;": "⩽",
	"lesdotor;": "⪃",
	"LessLess;": "⪡",
	"llcorner;": "⌞",
	"lnapprox;": "⪉",
	"lrcorner;": "⌟",
	"lurdshar;": "⥊",
	"mapstoup;": "↥",
	"multimap;": "⊸",
	"naturals;": "ℕ",
	"ncongdot;": "⩭̸",
	"NotEqual;": "≠",
	"notindot;": "⋵̸",
	"NotTilde;": "≁",
	"otimesas;": "⨶",
	"parallel;": "∥",
	"PartialD;": "∂",
	"plusacir;": "⨣",
	"pointint;": "⨕",
	"Precedes;": "≺",
	"precneqq;": "⪵",
	"precnsim;": "⋨",
	"profalar;": "⌮",
	"profline;": "⌒",
	"profsurf;": "⌓",
	"raemptyv;": "⦳",
	"realpart;": "ℜ",
	"RightTee;": "⊢",
	"rppolint;": "⨒",
	"rtriltri;": "⧎",
	"scpolint;": "⨓",
	"setminus;": "∖",
	"shortmid;": "∣",
	"smeparsl;": "⧤",
	"sqsubset;": "⊏",
	"sqsupset;": "⊐",
	"subseteq;": "⊆",
	"Succeeds;": "≻",
	"succneqq;": "⪶",
	"succnsim;": "⋩",
	"SuchThat;": "∋",
	"Superset;": "⊃",
	"supseteq;": "⊇",
	"thetasym;": "ϑ",
	"thicksim;": "∼",
	"timesbar;": "⨱",
	"triangle;": "▵",
	"triminus;": "⨺",
	"trpezium;": "⏢",
	"Uarrocir;": "⥉",
	"ulcorner;": "⌜",
	"UnderBar;": "_",
	"urcorner;": "⌝",
	"varkappa;": "ϰ",
	"varsigma;": "ς",
	"vartheta;": "ϑ",
	"backprime;": "‵",
	"backsimeq;": "⋍",
	"Backslash;": "∖",
	"bigotimes;": "⨂",
	"CenterDot;": "·",
	"centerdot;": "·",
	"checkmark;": "✓",
	"CircleDot;": "⊙",
	"complexes;": "ℂ",
	"Congruent;": "≡",
	"Coproduct;": "∐",
	"dotsquare;": "⊡",
	"DoubleDot;": "¨",
	"DownArrow;": "↓",
	"Downarrow;": "⇓",
	"downarrow;": "↓",
	"DownBreve;": "̑",
	"gtrapprox;": "⪆",
	"gtreqless;": "⋛",
	"gvertneqq;": "≩︀",
	"heartsuit;": "♥",
	"HumpEqual;": "≏",
	"LeftArrow;": "←",
	"Leftarrow;": "⇐",
	"leftarrow;": "←",
	"LeftFloor;": "⌊",
	"lesseqgtr;": "⋚",
	"LessTilde;": "≲",
	"lvertneqq;": "≨︀",
	"Mellintrf;": "ℳ",
	"MinusPlus;": "∓",
	"ngeqslant;": "⩾̸",
	"nleqslant;": "⩽̸",
	"NotCupCap;": "≭",
	"NotExists;": "∄",
	"NotSubset;": "⊂⃒",
	"nparallel;": "∦",
	"nshortmid;": "∤",
	"nsubseteq;": "⊈",
	"nsupseteq;": "⊉",
	"OverBrace;": "⏞",
	"pitchfork;": "⋔",
	"PlusMinus;": "±",
	"rationals;": "ℚ",
	"spadesuit;": "♠",
	"subseteqq;": "⫅",
	"subsetneq;": "⊊",
	"supseteqq;": "⫆",
	"supsetneq;": "⊋",
	"Therefore;": "∴",
	"therefore;": "∴",
	"ThinSpace;": " ",
	"triangleq;": "≜",
	"TripleDot;": "⃛",
	"UnionPlus;": "⊎",
	"varpropto;": "∝",
	"Bernoullis;": "ℬ",
	"circledast;": "⊛",
	"CirclePlus;": "⊕",
	"complement;": "∁",
	"curlywedge;": "⋏",
	"eqslantgtr;": "⪖",
	"EqualTilde;": "≂",
	"Fouriertrf;": "ℱ",
	"gtreqqless;": "⪌",
	"ImaginaryI;": "ⅈ",
	"Laplacetrf;": "ℒ",
	"LeftVector;": "↼",
	"lessapprox;": "⪅",
	"lesseqqgtr;": "⪋",
	"Lleftarrow;": "⇚",
	"lmoustache;": "⎰",
	"longmapsto;": "⟼",
	"mapstodown;": "↧",
	"mapstoleft;": "↤",
	"nLeftarrow;": "⇍",
	"nleftarrow;": "↚",
	"NotElement;": "∉",
	"NotGreater;": "≯",
	"nsubseteqq;": "⫅̸",
	"nsupseteqq;": "⫆̸",
	"precapprox;": "⪷",
	"Proportion;": "∷",
	"RightArrow;": "→",
	"Rightarrow;": "⇒",
	"rightarrow;": "→",
	"RightFloor;": "⌋",
	"rmoustache;": "⎱",
	"sqsubseteq;": "⊑",
	"sqsupseteq;": "⊒",
	"subsetneqq;": "⫋",
	"succapprox;": "⪸",
	"supsetneqq;": "⫌",
	"ThickSpace;": "  ",
	"TildeEqual;": "≃",
	"TildeTilde;": "≈",
	"UnderBrace;": "⏟",
	"UpArrowBar;": "⤒",
	"UpTeeArrow;": "↥",
	"upuparrows;": "⇈",
	"varepsilon;": "ϵ",
	"varnothing;": "∅",
	"backepsilon;": "϶",
	"blacksquare;": "▪",
	"circledcirc;": "⊚",
	"circleddash;": "⊝",
	"CircleMinus;": "⊖",
	"CircleTimes;": "⊗",
	"curlyeqprec;": "⋞",
	"curlyeqsucc;": "⋟",
	"diamondsuit;": "♦",
	"eqslantless;": "⪕",
	"Equilibrium;": "⇌",
	"expectation;": "ℰ",
	"GreaterLess;": "≷",
	"LeftCeiling;": "⌈",
	"LessGreater;": "≶",
	"MediumSpace;": " ",
	"NotLessLess;": "≪̸",
	"NotPrecedes;": "⊀",
	"NotSucceeds;": "⊁",
	"NotSuperset;": "⊃⃒",
	"nRightarrow;": "⇏",
	"nrightarrow;": "↛",
	"OverBracket;": "⎴",
	"preccurlyeq;": "≼",
	"precnapprox;": "⪹",
	"quaternions;": "ℍ",
	"RightVector;": "⇀",
	"Rrightarrow;": "⇛",
	"RuleDelayed;": "⧴",
	"SmallCircle;": "∘",
	"SquareUnion;": "⊔",
	"straightphi;": "ϕ",
	"SubsetEqual;": "⊆",
	"succcurlyeq;": "≽",
	"succnapprox;": "⪺",
	"thickapprox;": "≈",
	"UpDownArrow;": "↕",
	"Updownarrow;": "⇕",
	"updownarrow;": "↕",
	"VerticalBar;": "∣",
	"blacklozenge;": "⧫",
	"DownArrowBar;": "⤓",
	"DownTeeArrow;": "↧",
	"ExponentialE;": "ⅇ",
	"exponentiale;": "ⅇ",
	"GreaterEqual;": "≥",
	"GreaterTilde;": "≳",
	"HilbertSpace;": "ℋ",
	"HumpDownHump;": "≎",
	"Intersection;": "⋂",
	"LeftArrowBar;": "⇤",
	"LeftTeeArrow;": "↤",
	"LeftTriangle;": "⊲",
	"LeftUpVector;": "↿",
	"NotCongruent;": "≢",
	"NotHumpEqual;": "≏̸",
	"NotLessEqual;": "≰",
	"NotLessTilde;": "≴",
	"Proportional;": "∝",
	"RightCeiling;": "⌉",
	"risingdotseq;": "≓",
	"RoundImplies;": "⥰",
	"ShortUpArrow;": "↑",
	"SquareSubset;": "⊏",
	"triangledown;": "▿",
	"triangleleft;": "◃",
	"UnderBracket;": "⎵",
	"varsubsetneq;": "⊊︀",
	"varsupsetneq;": "⊋︀",
	"VerticalLine;": "|",
	"ApplyFunction;": "⁡",
	"bigtriangleup;": "△",
	"blacktriangle;": "▴",
	"DifferentialD;": "ⅆ",
	"divideontimes;": "⋇",
	"DoubleLeftTee;": "⫤",
	"DoubleUpArrow;": "⇑",
	"fallingdotseq;": "≒",
	"hookleftarrow;": "↩",
	"leftarrowtail;": "↢",
	"leftharpoonup;": "↼",
	"LeftTeeVector;": "⥚",
	"LeftVectorBar;": "⥒",
	"LessFullEqual;": "≦",
	"LongLeftArrow;": "⟵",
	"Longleftarrow;": "⟸",
	"longleftarrow;": "⟵",
	"looparrowleft;": "↫",
	"measuredangle;": "∡",
	"NotEqualTilde;": "≂̸",
	"NotTildeEqual;": "≄",
	"NotTildeTilde;": "≉",
	"ntriangleleft;": "⋪",
	"Poincareplane;": "ℌ",
	"PrecedesEqual;": "⪯",
	"PrecedesTilde;": "≾",
	"RightArrowBar;": "⇥",
	"RightTeeArrow;": "↦",
	"RightTriangle;": "⊳",
	"RightUpVector;": "↾",
	"shortparallel;": "∥",
	"smallsetminus;": "∖",
	"SucceedsEqual;": "⪰",
	"SucceedsTilde;": "≿",
	"SupersetEqual;": "⊇",
	"triangleright;": "▹",
	"UpEquilibrium;": "⥮",
	"upharpoonleft;": "↿",
	"varsubsetneqq;": "⫋︀",
	"varsupsetneqq;": "⫌︀",
	"VerticalTilde;": "≀",
	"VeryThinSpace;": " ",
	"curvearrowleft;": "↶",
	"DiacriticalDot;": "˙",
	"doublebarwedge;": "⌆",
	"DoubleRightTee;": "⊨",
	"downdownarrows;": "⇊",
	"DownLeftVector;": "↽",
	"GreaterGreater;": "⪢",
	"hookrightarrow;": "↪",
	"HorizontalLine;": "─",
	"InvisibleComma;": "⁣",
	"InvisibleTimes;": "⁢",
	"LeftDownVector;": "⇃",
	"leftleftarrows;": "⇇",
	"LeftRightArrow;": "↔",
	"Leftrightarrow;": "⇔",
	"leftrightarrow;": "↔",
	"leftthreetimes;": "⋋",
	"LessSlantEqual;": "⩽",
	"LongRightArrow;": "⟶",
	"Longrightarrow;": "⟹",
	"longrightarrow;": "⟶",
	"looparrowright;": "↬",
	"LowerLeftArrow;": "↙",
	"NestedLessLess;": "≪",
	"NotGreaterLess;": "≹",
	"NotLessGreater;": "≸",
	"NotSubsetEqual;": "⊈",
	"NotVerticalBar;": "∤",
	"nshortparallel;": "∦",
	"ntriangleright;": "⋫",
	"OpenCurlyQuote;": "‘",
	"ReverseElement;": "∋",
	"rightarrowtail;": "↣",
	"rightharpoonup;": "⇀",
	"RightTeeVector;": "⥛",
	"RightVectorBar;": "⥓",
	"ShortDownArrow;": "↓",
	"ShortLeftArrow;": "←",
	"SquareSuperset;": "⊐",
	"TildeFullEqual;": "≅",
	"trianglelefteq;": "⊴",
	"upharpoonright;": "↾",
	"UpperLeftArrow;": "↖",
	"ZeroWidthSpace;": "​",
	"bigtriangledown;": "▽",
	"circlearrowleft;": "↺",
	"CloseCurlyQuote;": "’",
	"ContourIntegral;": "∮",
	"curvearrowright;": "↷",
	"DoubleDownArrow;": "⇓",
	"DoubleLeftArrow;": "⇐",
	"downharpoonleft;": "⇃",
	"DownRightVector;": "⇁",
	"leftharpoondown;": "↽",
	"leftrightarrows;": "⇆",
	"LeftRightVector;": "⥎",
	"LeftTriangleBar;": "⧏",
	"LeftUpTeeVector;": "⥠",
	"LeftUpVectorBar;": "⥘",
	"LowerRightArrow;": "↘",
	"nLeftrightarrow;": "⇎",
	"nleftrightarrow;": "↮",
	"NotGreaterEqual;": "≱",
	"NotGreaterTilde;": "≵",
	"NotHumpDownHump;": "≎̸",
	"NotLeftTriangle;": "⋪",
	"NotSquareSubset;": "⊏̸",
	"ntrianglelefteq;": "⋬",
	"OverParenthesis;": "⏜",
	"RightDownVector;": "⇂",
	"rightleftarrows;": "⇄",
	"rightsquigarrow;": "↝",
	"rightthreetimes;": "⋌",
	"ShortRightArrow;": "→",
	"straightepsilon;": "ϵ",
	"trianglerighteq;": "⊵",
	"UpperRightArrow;": "↗",
	"vartriangleleft;": "⊲",
	"circlearrowright;": "↻",
	"DiacriticalAcute;": "´",
	"DiacriticalGrave;": "`",
	"DiacriticalTilde;": "˜",
	"DoubleRightArrow;": "⇒",
	"DownArrowUpArrow;": "⇵",
	"downharpoonright;": "⇂",
	"EmptySmallSquare;": "◻",
	"GreaterEqualLess;": "⋛",
	"GreaterFullEqual;": "≧",
	"LeftAngleBracket;": "⟨",
	"LeftUpDownVector;": "⥑",
	"LessEqualGreater;": "⋚",
	"NonBreakingSpace;": " ",
	"NotPrecedesEqual;": "⪯̸",
	"NotRightTriangle;": "⋫",
	"NotSucceedsEqual;": "⪰̸",
	"NotSucceedsTilde;": "≿̸",
	"NotSupersetEqual;": "⊉",
	"ntrianglerighteq;": "⋭",
	"rightharpoondown;": "⇁",
	"rightrightarrows;": "⇉",
	"RightTriangleBar;": "⧐",
	"RightUpTeeVector;": "⥜",
	"RightUpVectorBar;": "⥔",
	"twoheadleftarrow;": "↞",
	"UnderParenthesis;": "⏝",
	"UpArrowDownArrow;": "⇅",
	"vartriangleright;": "⊳",
	"blacktriangledown;": "▾",
	"blacktriangleleft;": "◂",
	"DoubleUpDownArrow;": "⇕",
	"DoubleVerticalBar;": "∥",
	"DownLeftTeeVector;": "⥞",
	"DownLeftVectorBar;": "⥖",
	"FilledSmallSquare;": "◼",
	"GreaterSlantEqual;": "⩾",
	"LeftDoubleBracket;": "⟦",
	"LeftDownTeeVector;": "⥡",
	"LeftDownVectorBar;": "⥙",
	"leftrightharpoons;": "⇋",
	"LeftTriangleEqual;": "⊴",
	"NegativeThinSpace;": "​",
	"NotGreaterGreater;": "≫̸",
	"NotLessSlantEqual;": "⩽̸",
	"NotNestedLessLess;": "⪡̸",
	"NotReverseElement;": "∌",
	"NotSquareSuperset;": "⊐̸",
	"NotTildeFullEqual;": "≇",
	"RightAngleBracket;": "⟩",
	"rightleftharpoons;": "⇌",
	"RightUpDownVector;": "⥏",
	"SquareSubsetEqual;": "⊑",
	"twoheadrightarrow;": "↠",
	"VerticalSeparator;": "❘",
	"blacktriangleright;": "▸",
	"DownRightTeeVector;": "⥟",
	"DownRightVectorBar;": "⥗",
	"LongLeftRightArrow;": "⟷",
	"Longleftrightarrow;": "⟺",
	"longleftrightarrow;": "⟷",
	"NegativeThickSpace;": "​",
	"NotLeftTriangleBar;": "⧏̸",
	"PrecedesSlantEqual;": "≼",
	"ReverseEquilibrium;": "⇋",
	"RightDoubleBracket;": "⟧",
	"RightDownTeeVector;": "⥝",
	"RightDownVectorBar;": "⥕",
	"RightTriangleEqual;": "⊵",
	"SquareIntersection;": "⊓",
	"SucceedsSlantEqual;": "≽",
	"DoubleLongLeftArrow;": "⟸",
	"DownLeftRightVector;": "⥐",
	"LeftArrowRightArrow;": "⇆",
	"leftrightsquigarrow;": "↭",
	"NegativeMediumSpace;": "​",
	"NotGreaterFullEqual;": "≧̸",
	"NotRightTriangleBar;": "⧐̸",
	"RightArrowLeftArrow;": "⇄",
	"SquareSupersetEqual;": "⊒",
	"CapitalDifferentialD;": "ⅅ",
	"DoubleLeftRightArrow;": "⇔",
	"DoubleLongRightArrow;": "⟹",
	"EmptyVerySmallSquare;": "▫",
	"NestedGreaterGreater;": "≫",
	"NotDoubleVerticalBar;": "∦",
	"NotGreaterSlantEqual;": "⩾̸",
	"NotLeftTriangleEqual;": "⋬",
	"NotSquareSubsetEqual;": "⋢",
	"OpenCurlyDoubleQuote;": "“",
	"ReverseUpEquilibrium;": "⥯",
	"CloseCurlyDoubleQuote;": "”",
	"DoubleContourIntegral;": "∯",
	"FilledVerySmallSquare;": "▪",
	"NegativeVeryThinSpace;": "​",
	"NotPrecedesSlantEqual;": "⋠",
	"NotRightTriangleEqual;": "⋭",
	"NotSucceedsSlantEqual;": "⋡",
	"DiacriticalDoubleAcute;": "˝",
	"NotSquareSupersetEqual;": "⋣",
	"NotNestedGreaterGreater;": "⪢̸",
	"ClockwiseContourIntegral;": "∲",
	"DoubleLongLeftRightArrow;": "⟺",
	"CounterClockwiseContourIntegral;": "∳"
};

// lazy compute this to make this file tree-shakable for browser
let maxCRNameLength;
const decodeHtml = (rawText, asAttr) => {
    let offset = 0;
    const end = rawText.length;
    let decodedText = '';
    function advance(length) {
        offset += length;
        rawText = rawText.slice(length);
    }
    while (offset < end) {
        const head = /&(?:#x?)?/i.exec(rawText);
        if (!head || offset + head.index >= end) {
            const remaining = end - offset;
            decodedText += rawText.slice(0, remaining);
            advance(remaining);
            break;
        }
        // Advance to the "&".
        decodedText += rawText.slice(0, head.index);
        advance(head.index);
        if (head[0] === '&') {
            // Named character reference.
            let name = '';
            let value = undefined;
            if (/[0-9a-z]/i.test(rawText[1])) {
                if (!maxCRNameLength) {
                    maxCRNameLength = Object.keys(namedCharacterReferences).reduce((max, name) => Math.max(max, name.length), 0);
                }
                for (let length = maxCRNameLength; !value && length > 0; --length) {
                    name = rawText.slice(1, 1 + length);
                    value = namedCharacterReferences[name];
                }
                if (value) {
                    const semi = name.endsWith(';');
                    if (asAttr &&
                        !semi &&
                        /[=a-z0-9]/i.test(rawText[name.length + 1] || '')) {
                        decodedText += '&' + name;
                        advance(1 + name.length);
                    }
                    else {
                        decodedText += value;
                        advance(1 + name.length);
                    }
                }
                else {
                    decodedText += '&' + name;
                    advance(1 + name.length);
                }
            }
            else {
                decodedText += '&';
                advance(1);
            }
        }
        else {
            // Numeric character reference.
            const hex = head[0] === '&#x';
            const pattern = hex ? /^&#x([0-9a-f]+);?/i : /^&#([0-9]+);?/;
            const body = pattern.exec(rawText);
            if (!body) {
                decodedText += head[0];
                advance(head[0].length);
            }
            else {
                // https://html.spec.whatwg.org/multipage/parsing.html#numeric-character-reference-end-state
                let cp = Number.parseInt(body[1], hex ? 16 : 10);
                if (cp === 0) {
                    cp = 0xfffd;
                }
                else if (cp > 0x10ffff) {
                    cp = 0xfffd;
                }
                else if (cp >= 0xd800 && cp <= 0xdfff) {
                    cp = 0xfffd;
                }
                else if ((cp >= 0xfdd0 && cp <= 0xfdef) || (cp & 0xfffe) === 0xfffe) ;
                else if ((cp >= 0x01 && cp <= 0x08) ||
                    cp === 0x0b ||
                    (cp >= 0x0d && cp <= 0x1f) ||
                    (cp >= 0x7f && cp <= 0x9f)) {
                    cp = CCR_REPLACEMENTS[cp] || cp;
                }
                decodedText += String.fromCodePoint(cp);
                advance(body[0].length);
            }
        }
    }
    return decodedText;
};
// https://html.spec.whatwg.org/multipage/parsing.html#numeric-character-reference-end-state
const CCR_REPLACEMENTS = {
    0x80: 0x20ac,
    0x82: 0x201a,
    0x83: 0x0192,
    0x84: 0x201e,
    0x85: 0x2026,
    0x86: 0x2020,
    0x87: 0x2021,
    0x88: 0x02c6,
    0x89: 0x2030,
    0x8a: 0x0160,
    0x8b: 0x2039,
    0x8c: 0x0152,
    0x8e: 0x017d,
    0x91: 0x2018,
    0x92: 0x2019,
    0x93: 0x201c,
    0x94: 0x201d,
    0x95: 0x2022,
    0x96: 0x2013,
    0x97: 0x2014,
    0x98: 0x02dc,
    0x99: 0x2122,
    0x9a: 0x0161,
    0x9b: 0x203a,
    0x9c: 0x0153,
    0x9e: 0x017e,
    0x9f: 0x0178
};

const isRawTextContainer = /*#__PURE__*/ makeMap('style,iframe,script,noscript', true);
const parserOptions = {
    isVoidTag,
    isNativeTag: tag => isHTMLTag(tag) || isSVGTag(tag),
    isPreTag: tag => tag === 'pre',
    decodeEntities: decodeHtml,
    isBuiltInComponent: (tag) => {
        if (isBuiltInType(tag, `Transition`)) {
            return TRANSITION;
        }
        else if (isBuiltInType(tag, `TransitionGroup`)) {
            return TRANSITION_GROUP;
        }
    },
    // https://html.spec.whatwg.org/multipage/parsing.html#tree-construction-dispatcher
    getNamespace(tag, parent) {
        let ns = parent ? parent.ns : 0 /* HTML */;
        if (parent && ns === 2 /* MATH_ML */) {
            if (parent.tag === 'annotation-xml') {
                if (tag === 'svg') {
                    return 1 /* SVG */;
                }
                if (parent.props.some(a => a.type === 6 /* ATTRIBUTE */ &&
                    a.name === 'encoding' &&
                    a.value != null &&
                    (a.value.content === 'text/html' ||
                        a.value.content === 'application/xhtml+xml'))) {
                    ns = 0 /* HTML */;
                }
            }
            else if (/^m(?:[ions]|text)$/.test(parent.tag) &&
                tag !== 'mglyph' &&
                tag !== 'malignmark') {
                ns = 0 /* HTML */;
            }
        }
        else if (parent && ns === 1 /* SVG */) {
            if (parent.tag === 'foreignObject' ||
                parent.tag === 'desc' ||
                parent.tag === 'title') {
                ns = 0 /* HTML */;
            }
        }
        if (ns === 0 /* HTML */) {
            if (tag === 'svg') {
                return 1 /* SVG */;
            }
            if (tag === 'math') {
                return 2 /* MATH_ML */;
            }
        }
        return ns;
    },
    // https://html.spec.whatwg.org/multipage/parsing.html#parsing-html-fragments
    getTextMode({ tag, ns }) {
        if (ns === 0 /* HTML */) {
            if (tag === 'textarea' || tag === 'title') {
                return 1 /* RCDATA */;
            }
            if (isRawTextContainer(tag)) {
                return 2 /* RAWTEXT */;
            }
        }
        return 0 /* DATA */;
    }
};

// Parse inline CSS strings for static style attributes into an object.
// This is a NodeTransform since it works on the static `style` attribute and
// converts it into a dynamic equivalent:
// style="color: red" -> :style='{ "color": "red" }'
// It is then processed by `transformElement` and included in the generated
// props.
const transformStyle = node => {
    if (node.type === 1 /* ELEMENT */) {
        node.props.forEach((p, i) => {
            if (p.type === 6 /* ATTRIBUTE */ && p.name === 'style' && p.value) {
                // replace p with an expression node
                node.props[i] = {
                    type: 7 /* DIRECTIVE */,
                    name: `bind`,
                    arg: createSimpleExpression(`style`, true, p.loc),
                    exp: parseInlineCSS(p.value.content, p.loc),
                    modifiers: [],
                    loc: p.loc
                };
            }
        });
    }
};
const parseInlineCSS = (cssText, loc) => {
    const normalized = parseStringStyle(cssText);
    return createSimpleExpression(JSON.stringify(normalized), false, loc, 3 /* CAN_STRINGIFY */);
};

function createDOMCompilerError(code, loc) {
    return createCompilerError(code, loc, DOMErrorMessages );
}
const DOMErrorMessages = {
    [50 /* X_V_HTML_NO_EXPRESSION */]: `v-html is missing expression.`,
    [51 /* X_V_HTML_WITH_CHILDREN */]: `v-html will override element children.`,
    [52 /* X_V_TEXT_NO_EXPRESSION */]: `v-text is missing expression.`,
    [53 /* X_V_TEXT_WITH_CHILDREN */]: `v-text will override element children.`,
    [54 /* X_V_MODEL_ON_INVALID_ELEMENT */]: `v-model can only be used on <input>, <textarea> and <select> elements.`,
    [55 /* X_V_MODEL_ARG_ON_ELEMENT */]: `v-model argument is not supported on plain elements.`,
    [56 /* X_V_MODEL_ON_FILE_INPUT_ELEMENT */]: `v-model cannot be used on file inputs since they are read-only. Use a v-on:change listener instead.`,
    [57 /* X_V_MODEL_UNNECESSARY_VALUE */]: `Unnecessary value binding used alongside v-model. It will interfere with v-model's behavior.`,
    [58 /* X_V_SHOW_NO_EXPRESSION */]: `v-show is missing expression.`,
    [59 /* X_TRANSITION_INVALID_CHILDREN */]: `<Transition> expects exactly one child element or component.`,
    [60 /* X_IGNORED_SIDE_EFFECT_TAG */]: `Tags with side effect (<script> and <style>) are ignored in client component templates.`
};

const transformVHtml = (dir, node, context) => {
    const { exp, loc } = dir;
    if (!exp) {
        context.onError(createDOMCompilerError(50 /* X_V_HTML_NO_EXPRESSION */, loc));
    }
    if (node.children.length) {
        context.onError(createDOMCompilerError(51 /* X_V_HTML_WITH_CHILDREN */, loc));
        node.children.length = 0;
    }
    return {
        props: [
            createObjectProperty(createSimpleExpression(`innerHTML`, true, loc), exp || createSimpleExpression('', true))
        ]
    };
};

const transformVText = (dir, node, context) => {
    const { exp, loc } = dir;
    if (!exp) {
        context.onError(createDOMCompilerError(52 /* X_V_TEXT_NO_EXPRESSION */, loc));
    }
    if (node.children.length) {
        context.onError(createDOMCompilerError(53 /* X_V_TEXT_WITH_CHILDREN */, loc));
        node.children.length = 0;
    }
    return {
        props: [
            createObjectProperty(createSimpleExpression(`textContent`, true), exp
                ? getConstantType(exp, context) > 0
                    ? exp
                    : createCallExpression(context.helperString(TO_DISPLAY_STRING), [exp], loc)
                : createSimpleExpression('', true))
        ]
    };
};

const transformModel$1 = (dir, node, context) => {
    const baseResult = transformModel(dir, node, context);
    // base transform has errors OR component v-model (only need props)
    if (!baseResult.props.length || node.tagType === 1 /* COMPONENT */) {
        return baseResult;
    }
    if (dir.arg) {
        context.onError(createDOMCompilerError(55 /* X_V_MODEL_ARG_ON_ELEMENT */, dir.arg.loc));
    }
    function checkDuplicatedValue() {
        const value = findProp(node, 'value');
        if (value) {
            context.onError(createDOMCompilerError(57 /* X_V_MODEL_UNNECESSARY_VALUE */, value.loc));
        }
    }
    const { tag } = node;
    const isCustomElement = context.isCustomElement(tag);
    if (tag === 'input' ||
        tag === 'textarea' ||
        tag === 'select' ||
        isCustomElement) {
        let directiveToUse = V_MODEL_TEXT;
        let isInvalidType = false;
        if (tag === 'input' || isCustomElement) {
            const type = findProp(node, `type`);
            if (type) {
                if (type.type === 7 /* DIRECTIVE */) {
                    // :type="foo"
                    directiveToUse = V_MODEL_DYNAMIC;
                }
                else if (type.value) {
                    switch (type.value.content) {
                        case 'radio':
                            directiveToUse = V_MODEL_RADIO;
                            break;
                        case 'checkbox':
                            directiveToUse = V_MODEL_CHECKBOX;
                            break;
                        case 'file':
                            isInvalidType = true;
                            context.onError(createDOMCompilerError(56 /* X_V_MODEL_ON_FILE_INPUT_ELEMENT */, dir.loc));
                            break;
                        default:
                            // text type
                            checkDuplicatedValue();
                            break;
                    }
                }
            }
            else if (hasDynamicKeyVBind(node)) {
                // element has bindings with dynamic keys, which can possibly contain
                // "type".
                directiveToUse = V_MODEL_DYNAMIC;
            }
            else {
                // text type
                checkDuplicatedValue();
            }
        }
        else if (tag === 'select') {
            directiveToUse = V_MODEL_SELECT;
        }
        else {
            // textarea
            checkDuplicatedValue();
        }
        // inject runtime directive
        // by returning the helper symbol via needRuntime
        // the import will replaced a resolveDirective call.
        if (!isInvalidType) {
            baseResult.needRuntime = context.helper(directiveToUse);
        }
    }
    else {
        context.onError(createDOMCompilerError(54 /* X_V_MODEL_ON_INVALID_ELEMENT */, dir.loc));
    }
    // native vmodel doesn't need the `modelValue` props since they are also
    // passed to the runtime as `binding.value`. removing it reduces code size.
    baseResult.props = baseResult.props.filter(p => !(p.key.type === 4 /* SIMPLE_EXPRESSION */ &&
        p.key.content === 'modelValue'));
    return baseResult;
};

const isEventOptionModifier = /*#__PURE__*/ makeMap(`passive,once,capture`);
const isNonKeyModifier = /*#__PURE__*/ makeMap(
// event propagation management
`stop,prevent,self,` +
    // system modifiers + exact
    `ctrl,shift,alt,meta,exact,` +
    // mouse
    `middle`);
// left & right could be mouse or key modifiers based on event type
const maybeKeyModifier = /*#__PURE__*/ makeMap('left,right');
const isKeyboardEvent = /*#__PURE__*/ makeMap(`onkeyup,onkeydown,onkeypress`, true);
const resolveModifiers = (key, modifiers, context, loc) => {
    const keyModifiers = [];
    const nonKeyModifiers = [];
    const eventOptionModifiers = [];
    for (let i = 0; i < modifiers.length; i++) {
        const modifier = modifiers[i];
        if (isEventOptionModifier(modifier)) {
            // eventOptionModifiers: modifiers for addEventListener() options,
            // e.g. .passive & .capture
            eventOptionModifiers.push(modifier);
        }
        else {
            // runtimeModifiers: modifiers that needs runtime guards
            if (maybeKeyModifier(modifier)) {
                if (isStaticExp(key)) {
                    if (isKeyboardEvent(key.content)) {
                        keyModifiers.push(modifier);
                    }
                    else {
                        nonKeyModifiers.push(modifier);
                    }
                }
                else {
                    keyModifiers.push(modifier);
                    nonKeyModifiers.push(modifier);
                }
            }
            else {
                if (isNonKeyModifier(modifier)) {
                    nonKeyModifiers.push(modifier);
                }
                else {
                    keyModifiers.push(modifier);
                }
            }
        }
    }
    return {
        keyModifiers,
        nonKeyModifiers,
        eventOptionModifiers
    };
};
const transformClick = (key, event) => {
    const isStaticClick = isStaticExp(key) && key.content.toLowerCase() === 'onclick';
    return isStaticClick
        ? createSimpleExpression(event, true)
        : key.type !== 4 /* SIMPLE_EXPRESSION */
            ? createCompoundExpression([
                `(`,
                key,
                `) === "onClick" ? "${event}" : (`,
                key,
                `)`
            ])
            : key;
};
const transformOn$1 = (dir, node, context) => {
    return transformOn(dir, node, context, baseResult => {
        const { modifiers } = dir;
        if (!modifiers.length)
            return baseResult;
        let { key, value: handlerExp } = baseResult.props[0];
        const { keyModifiers, nonKeyModifiers, eventOptionModifiers } = resolveModifiers(key, modifiers, context, dir.loc);
        // normalize click.right and click.middle since they don't actually fire
        if (nonKeyModifiers.includes('right')) {
            key = transformClick(key, `onContextmenu`);
        }
        if (nonKeyModifiers.includes('middle')) {
            key = transformClick(key, `onMouseup`);
        }
        if (nonKeyModifiers.length) {
            handlerExp = createCallExpression(context.helper(V_ON_WITH_MODIFIERS), [
                handlerExp,
                JSON.stringify(nonKeyModifiers)
            ]);
        }
        if (keyModifiers.length &&
            // if event name is dynamic, always wrap with keys guard
            (!isStaticExp(key) || isKeyboardEvent(key.content))) {
            handlerExp = createCallExpression(context.helper(V_ON_WITH_KEYS), [
                handlerExp,
                JSON.stringify(keyModifiers)
            ]);
        }
        if (eventOptionModifiers.length) {
            const modifierPostfix = eventOptionModifiers.map(capitalize).join('');
            key = isStaticExp(key)
                ? createSimpleExpression(`${key.content}${modifierPostfix}`, true)
                : createCompoundExpression([`(`, key, `) + "${modifierPostfix}"`]);
        }
        return {
            props: [createObjectProperty(key, handlerExp)]
        };
    });
};

const transformShow = (dir, node, context) => {
    const { exp, loc } = dir;
    if (!exp) {
        context.onError(createDOMCompilerError(58 /* X_V_SHOW_NO_EXPRESSION */, loc));
    }
    return {
        props: [],
        needRuntime: context.helper(V_SHOW)
    };
};

const transformTransition = (node, context) => {
    if (node.type === 1 /* ELEMENT */ &&
        node.tagType === 1 /* COMPONENT */) {
        const component = context.isBuiltInComponent(node.tag);
        if (component === TRANSITION) {
            return () => {
                if (!node.children.length) {
                    return;
                }
                // warn multiple transition children
                if (hasMultipleChildren(node)) {
                    context.onError(createDOMCompilerError(59 /* X_TRANSITION_INVALID_CHILDREN */, {
                        start: node.children[0].loc.start,
                        end: node.children[node.children.length - 1].loc.end,
                        source: ''
                    }));
                }
                // check if it's s single child w/ v-show
                // if yes, inject "persisted: true" to the transition props
                const child = node.children[0];
                if (child.type === 1 /* ELEMENT */) {
                    for (const p of child.props) {
                        if (p.type === 7 /* DIRECTIVE */ && p.name === 'show') {
                            node.props.push({
                                type: 6 /* ATTRIBUTE */,
                                name: 'persisted',
                                value: undefined,
                                loc: node.loc
                            });
                        }
                    }
                }
            };
        }
    }
};
function hasMultipleChildren(node) {
    // #1352 filter out potential comment nodes.
    const children = (node.children = node.children.filter(c => c.type !== 3 /* COMMENT */ &&
        !(c.type === 2 /* TEXT */ && !c.content.trim())));
    const child = children[0];
    return (children.length !== 1 ||
        child.type === 11 /* FOR */ ||
        (child.type === 9 /* IF */ && child.branches.some(hasMultipleChildren)));
}

/**
 * This module is Node-only.
 */
/**
 * Regex for replacing placeholders for embedded constant variables
 * (e.g. import URL string constants generated by compiler-sfc)
 */
const expReplaceRE = /__VUE_EXP_START__(.*?)__VUE_EXP_END__/g;
/**
 * Turn eligible hoisted static trees into stringified static nodes, e.g.
 *
 * ```js
 * const _hoisted_1 = createStaticVNode(`<div class="foo">bar</div>`)
 * ```
 *
 * A single static vnode can contain stringified content for **multiple**
 * consecutive nodes (element and plain text), called a "chunk".
 * `@vue/runtime-dom` will create the content via innerHTML in a hidden
 * container element and insert all the nodes in place. The call must also
 * provide the number of nodes contained in the chunk so that during hydration
 * we can know how many nodes the static vnode should adopt.
 *
 * The optimization scans a children list that contains hoisted nodes, and
 * tries to find the largest chunk of consecutive hoisted nodes before running
 * into a non-hoisted node or the end of the list. A chunk is then converted
 * into a single static vnode and replaces the hoisted expression of the first
 * node in the chunk. Other nodes in the chunk are considered "merged" and
 * therefore removed from both the hoist list and the children array.
 *
 * This optimization is only performed in Node.js.
 */
const stringifyStatic = (children, context, parent) => {
    // bail stringification for slot content
    if (context.scopes.vSlot > 0) {
        return;
    }
    let nc = 0; // current node count
    let ec = 0; // current element with binding count
    const currentChunk = [];
    const stringifyCurrentChunk = (currentIndex) => {
        if (nc >= 20 /* NODE_COUNT */ ||
            ec >= 5 /* ELEMENT_WITH_BINDING_COUNT */) {
            // combine all currently eligible nodes into a single static vnode call
            const staticCall = createCallExpression(context.helper(CREATE_STATIC), [
                JSON.stringify(currentChunk.map(node => stringifyNode(node, context)).join('')).replace(expReplaceRE, `" + $1 + "`),
                // the 2nd argument indicates the number of DOM nodes this static vnode
                // will insert / hydrate
                String(currentChunk.length)
            ]);
            // replace the first node's hoisted expression with the static vnode call
            replaceHoist(currentChunk[0], staticCall, context);
            if (currentChunk.length > 1) {
                for (let i = 1; i < currentChunk.length; i++) {
                    // for the merged nodes, set their hoisted expression to null
                    replaceHoist(currentChunk[i], null, context);
                }
                // also remove merged nodes from children
                const deleteCount = currentChunk.length - 1;
                children.splice(currentIndex - currentChunk.length + 1, deleteCount);
                return deleteCount;
            }
        }
        return 0;
    };
    let i = 0;
    for (; i < children.length; i++) {
        const child = children[i];
        const hoisted = getHoistedNode(child);
        if (hoisted) {
            // presence of hoisted means child must be a stringifiable node
            const node = child;
            const result = analyzeNode(node);
            if (result) {
                // node is stringifiable, record state
                nc += result[0];
                ec += result[1];
                currentChunk.push(node);
                continue;
            }
        }
        // we only reach here if we ran into a node that is not stringifiable
        // check if currently analyzed nodes meet criteria for stringification.
        // adjust iteration index
        i -= stringifyCurrentChunk(i);
        // reset state
        nc = 0;
        ec = 0;
        currentChunk.length = 0;
    }
    // in case the last node was also stringifiable
    stringifyCurrentChunk(i);
};
const getHoistedNode = (node) => ((node.type === 1 /* ELEMENT */ && node.tagType === 0 /* ELEMENT */) ||
    node.type == 12 /* TEXT_CALL */) &&
    node.codegenNode &&
    node.codegenNode.type === 4 /* SIMPLE_EXPRESSION */ &&
    node.codegenNode.hoisted;
const dataAriaRE = /^(data|aria)-/;
const isStringifiableAttr = (name, ns) => {
    return ((ns === 0 /* HTML */
        ? isKnownHtmlAttr(name)
        : ns === 1 /* SVG */
            ? isKnownSvgAttr(name)
            : false) || dataAriaRE.test(name));
};
const replaceHoist = (node, replacement, context) => {
    const hoistToReplace = node.codegenNode.hoisted;
    context.hoists[context.hoists.indexOf(hoistToReplace)] = replacement;
};
const isNonStringifiable = /*#__PURE__*/ makeMap(`caption,thead,tr,th,tbody,td,tfoot,colgroup,col`);
/**
 * for a hoisted node, analyze it and return:
 * - false: bailed (contains non-stringifiable props or runtime constant)
 * - [nc, ec] where
 *   - nc is the number of nodes inside
 *   - ec is the number of element with bindings inside
 */
function analyzeNode(node) {
    if (node.type === 1 /* ELEMENT */ && isNonStringifiable(node.tag)) {
        return false;
    }
    if (node.type === 12 /* TEXT_CALL */) {
        return [1, 0];
    }
    let nc = 1; // node count
    let ec = node.props.length > 0 ? 1 : 0; // element w/ binding count
    let bailed = false;
    const bail = () => {
        bailed = true;
        return false;
    };
    // TODO: check for cases where using innerHTML will result in different
    // output compared to imperative node insertions.
    // probably only need to check for most common case
    // i.e. non-phrasing-content tags inside `<p>`
    function walk(node) {
        for (let i = 0; i < node.props.length; i++) {
            const p = node.props[i];
            // bail on non-attr bindings
            if (p.type === 6 /* ATTRIBUTE */ &&
                !isStringifiableAttr(p.name, node.ns)) {
                return bail();
            }
            if (p.type === 7 /* DIRECTIVE */ && p.name === 'bind') {
                // bail on non-attr bindings
                if (p.arg &&
                    (p.arg.type === 8 /* COMPOUND_EXPRESSION */ ||
                        (p.arg.isStatic && !isStringifiableAttr(p.arg.content, node.ns)))) {
                    return bail();
                }
                if (p.exp &&
                    (p.exp.type === 8 /* COMPOUND_EXPRESSION */ ||
                        p.exp.constType < 3 /* CAN_STRINGIFY */)) {
                    return bail();
                }
            }
        }
        for (let i = 0; i < node.children.length; i++) {
            nc++;
            const child = node.children[i];
            if (child.type === 1 /* ELEMENT */) {
                if (child.props.length > 0) {
                    ec++;
                }
                walk(child);
                if (bailed) {
                    return false;
                }
            }
        }
        return true;
    }
    return walk(node) ? [nc, ec] : false;
}
function stringifyNode(node, context) {
    if (isString(node)) {
        return node;
    }
    if (isSymbol(node)) {
        return ``;
    }
    switch (node.type) {
        case 1 /* ELEMENT */:
            return stringifyElement(node, context);
        case 2 /* TEXT */:
            return escapeHtml(node.content);
        case 3 /* COMMENT */:
            return `<!--${escapeHtml(node.content)}-->`;
        case 5 /* INTERPOLATION */:
            return escapeHtml(toDisplayString(evaluateConstant(node.content)));
        case 8 /* COMPOUND_EXPRESSION */:
            return escapeHtml(evaluateConstant(node));
        case 12 /* TEXT_CALL */:
            return stringifyNode(node.content, context);
        default:
            // static trees will not contain if/for nodes
            return '';
    }
}
function stringifyElement(node, context) {
    let res = `<${node.tag}`;
    let innerHTML = '';
    for (let i = 0; i < node.props.length; i++) {
        const p = node.props[i];
        if (p.type === 6 /* ATTRIBUTE */) {
            res += ` ${p.name}`;
            if (p.value) {
                res += `="${escapeHtml(p.value.content)}"`;
            }
        }
        else if (p.type === 7 /* DIRECTIVE */) {
            if (p.name === 'bind') {
                const exp = p.exp;
                if (exp.content[0] === '_') {
                    // internally generated string constant references
                    // e.g. imported URL strings via compiler-sfc transformAssetUrl plugin
                    res += ` ${p.arg.content}="__VUE_EXP_START__${exp.content}__VUE_EXP_END__"`;
                    continue;
                }
                // constant v-bind, e.g. :foo="1"
                let evaluated = evaluateConstant(exp);
                if (evaluated != null) {
                    const arg = p.arg && p.arg.content;
                    if (arg === 'class') {
                        evaluated = normalizeClass(evaluated);
                    }
                    else if (arg === 'style') {
                        evaluated = stringifyStyle(normalizeStyle(evaluated));
                    }
                    res += ` ${p.arg.content}="${escapeHtml(evaluated)}"`;
                }
            }
            else if (p.name === 'html') {
                // #5439 v-html with constant value
                // not sure why would anyone do this but it can happen
                innerHTML = evaluateConstant(p.exp);
            }
            else if (p.name === 'text') {
                innerHTML = escapeHtml(toDisplayString(evaluateConstant(p.exp)));
            }
        }
    }
    if (context.scopeId) {
        res += ` ${context.scopeId}`;
    }
    res += `>`;
    if (innerHTML) {
        res += innerHTML;
    }
    else {
        for (let i = 0; i < node.children.length; i++) {
            res += stringifyNode(node.children[i], context);
        }
    }
    if (!isVoidTag(node.tag)) {
        res += `</${node.tag}>`;
    }
    return res;
}
// __UNSAFE__
// Reason: eval.
// It's technically safe to eval because only constant expressions are possible
// here, e.g. `{{ 1 }}` or `{{ 'foo' }}`
// in addition, constant exps bail on presence of parens so you can't even
// run JSFuck in here. But we mark it unsafe for security review purposes.
// (see compiler-core/src/transforms/transformExpression)
function evaluateConstant(exp) {
    if (exp.type === 4 /* SIMPLE_EXPRESSION */) {
        return new Function(`return ${exp.content}`)();
    }
    else {
        // compound
        let res = ``;
        exp.children.forEach(c => {
            if (isString(c) || isSymbol(c)) {
                return;
            }
            if (c.type === 2 /* TEXT */) {
                res += c.content;
            }
            else if (c.type === 5 /* INTERPOLATION */) {
                res += toDisplayString(evaluateConstant(c.content));
            }
            else {
                res += evaluateConstant(c);
            }
        });
        return res;
    }
}

const ignoreSideEffectTags = (node, context) => {
    if (node.type === 1 /* ELEMENT */ &&
        node.tagType === 0 /* ELEMENT */ &&
        (node.tag === 'script' || node.tag === 'style')) {
        context.onError(createDOMCompilerError(60 /* X_IGNORED_SIDE_EFFECT_TAG */, node.loc));
        context.removeNode();
    }
};

const DOMNodeTransforms = [
    transformStyle,
    ...([transformTransition] )
];
const DOMDirectiveTransforms = {
    cloak: noopDirectiveTransform,
    html: transformVHtml,
    text: transformVText,
    model: transformModel$1,
    on: transformOn$1,
    show: transformShow
};
function compile(template, options = {}) {
    return baseCompile(template, extend({}, parserOptions, options, {
        nodeTransforms: [
            // ignore <script> and <tag>
            // this is not put inside DOMNodeTransforms because that list is used
            // by compiler-ssr to generate vnode fallback branches
            ignoreSideEffectTags,
            ...DOMNodeTransforms,
            ...(options.nodeTransforms || [])
        ],
        directiveTransforms: extend({}, DOMDirectiveTransforms, options.directiveTransforms || {}),
        transformHoist: stringifyStatic
    }));
}
function parse$1(template, options = {}) {
    return baseParse(template, extend({}, parserOptions, options));
}

var CompilerDOM = /*#__PURE__*/Object.freeze({
  __proto__: null,
  parserOptions: parserOptions,
  DOMNodeTransforms: DOMNodeTransforms,
  DOMDirectiveTransforms: DOMDirectiveTransforms,
  compile: compile,
  parse: parse$1,
  transformStyle: transformStyle,
  createDOMCompilerError: createDOMCompilerError,
  V_MODEL_RADIO: V_MODEL_RADIO,
  V_MODEL_CHECKBOX: V_MODEL_CHECKBOX,
  V_MODEL_TEXT: V_MODEL_TEXT,
  V_MODEL_SELECT: V_MODEL_SELECT,
  V_MODEL_DYNAMIC: V_MODEL_DYNAMIC,
  V_ON_WITH_MODIFIERS: V_ON_WITH_MODIFIERS,
  V_ON_WITH_KEYS: V_ON_WITH_KEYS,
  V_SHOW: V_SHOW,
  TRANSITION: TRANSITION,
  TRANSITION_GROUP: TRANSITION_GROUP,
  baseCompile: baseCompile,
  baseParse: baseParse,
  transform: transform,
  createTransformContext: createTransformContext,
  traverseNode: traverseNode,
  createStructuralDirectiveTransform: createStructuralDirectiveTransform,
  generate: generate,
  createCompilerError: createCompilerError,
  getBaseTransformPreset: getBaseTransformPreset,
  transformModel: transformModel,
  transformOn: transformOn,
  transformBind: transformBind,
  noopDirectiveTransform: noopDirectiveTransform,
  processIf: processIf,
  processFor: processFor,
  createForLoopParams: createForLoopParams,
  transformExpression: transformExpression,
  processExpression: processExpression,
  buildSlots: buildSlots,
  trackVForSlotScopes: trackVForSlotScopes,
  trackSlotScopes: trackSlotScopes,
  transformElement: transformElement,
  resolveComponentType: resolveComponentType,
  buildProps: buildProps,
  buildDirectiveArgs: buildDirectiveArgs,
  processSlotOutlet: processSlotOutlet,
  getConstantType: getConstantType,
  generateCodeFrame: generateCodeFrame,
  checkCompatEnabled: checkCompatEnabled,
  warnDeprecation: warnDeprecation,
  locStub: locStub,
  createRoot: createRoot,
  createVNodeCall: createVNodeCall,
  createArrayExpression: createArrayExpression,
  createObjectExpression: createObjectExpression,
  createObjectProperty: createObjectProperty,
  createSimpleExpression: createSimpleExpression,
  createInterpolation: createInterpolation,
  createCompoundExpression: createCompoundExpression,
  createCallExpression: createCallExpression,
  createFunctionExpression: createFunctionExpression,
  createConditionalExpression: createConditionalExpression,
  createCacheExpression: createCacheExpression,
  createBlockStatement: createBlockStatement,
  createTemplateLiteral: createTemplateLiteral,
  createIfStatement: createIfStatement,
  createAssignmentExpression: createAssignmentExpression,
  createSequenceExpression: createSequenceExpression,
  createReturnStatement: createReturnStatement,
  isStaticExp: isStaticExp,
  isBuiltInType: isBuiltInType,
  isCoreComponent: isCoreComponent,
  isSimpleIdentifier: isSimpleIdentifier,
  isMemberExpressionBrowser: isMemberExpressionBrowser,
  isMemberExpressionNode: isMemberExpressionNode,
  isMemberExpression: isMemberExpression,
  getInnerRange: getInnerRange,
  advancePositionWithClone: advancePositionWithClone,
  advancePositionWithMutation: advancePositionWithMutation,
  assert: assert$1,
  findDir: findDir,
  findProp: findProp,
  isStaticArgOf: isStaticArgOf,
  hasDynamicKeyVBind: hasDynamicKeyVBind,
  isText: isText,
  isVSlot: isVSlot,
  isTemplateNode: isTemplateNode,
  isSlotOutlet: isSlotOutlet,
  getVNodeHelper: getVNodeHelper,
  getVNodeBlockHelper: getVNodeBlockHelper,
  injectProp: injectProp,
  toValidAssetId: toValidAssetId,
  hasScopeRef: hasScopeRef,
  getMemoedVNodeCall: getMemoedVNodeCall,
  makeBlock: makeBlock,
  walkIdentifiers: walkIdentifiers,
  isReferencedIdentifier: isReferencedIdentifier,
  isInDestructureAssignment: isInDestructureAssignment,
  walkFunctionParams: walkFunctionParams,
  walkBlockDeclarations: walkBlockDeclarations,
  extractIdentifiers: extractIdentifiers,
  isFunctionType: isFunctionType,
  isStaticProperty: isStaticProperty,
  isStaticPropertyKey: isStaticPropertyKey,
  FRAGMENT: FRAGMENT,
  TELEPORT: TELEPORT,
  SUSPENSE: SUSPENSE,
  KEEP_ALIVE: KEEP_ALIVE,
  BASE_TRANSITION: BASE_TRANSITION,
  OPEN_BLOCK: OPEN_BLOCK,
  CREATE_BLOCK: CREATE_BLOCK,
  CREATE_ELEMENT_BLOCK: CREATE_ELEMENT_BLOCK,
  CREATE_VNODE: CREATE_VNODE,
  CREATE_ELEMENT_VNODE: CREATE_ELEMENT_VNODE,
  CREATE_COMMENT: CREATE_COMMENT,
  CREATE_TEXT: CREATE_TEXT,
  CREATE_STATIC: CREATE_STATIC,
  RESOLVE_COMPONENT: RESOLVE_COMPONENT,
  RESOLVE_DYNAMIC_COMPONENT: RESOLVE_DYNAMIC_COMPONENT,
  RESOLVE_DIRECTIVE: RESOLVE_DIRECTIVE,
  RESOLVE_FILTER: RESOLVE_FILTER,
  WITH_DIRECTIVES: WITH_DIRECTIVES,
  RENDER_LIST: RENDER_LIST,
  RENDER_SLOT: RENDER_SLOT,
  CREATE_SLOTS: CREATE_SLOTS,
  TO_DISPLAY_STRING: TO_DISPLAY_STRING,
  MERGE_PROPS: MERGE_PROPS,
  NORMALIZE_CLASS: NORMALIZE_CLASS,
  NORMALIZE_STYLE: NORMALIZE_STYLE,
  NORMALIZE_PROPS: NORMALIZE_PROPS,
  GUARD_REACTIVE_PROPS: GUARD_REACTIVE_PROPS,
  TO_HANDLERS: TO_HANDLERS,
  CAMELIZE: CAMELIZE,
  CAPITALIZE: CAPITALIZE,
  TO_HANDLER_KEY: TO_HANDLER_KEY,
  SET_BLOCK_TRACKING: SET_BLOCK_TRACKING,
  PUSH_SCOPE_ID: PUSH_SCOPE_ID,
  POP_SCOPE_ID: POP_SCOPE_ID,
  WITH_CTX: WITH_CTX,
  UNREF: UNREF,
  IS_REF: IS_REF,
  WITH_MEMO: WITH_MEMO,
  IS_MEMO_SAME: IS_MEMO_SAME,
  helperNameMap: helperNameMap,
  registerRuntimeHelpers: registerRuntimeHelpers
});

function pad (hash, len) {
  while (hash.length < len) {
    hash = '0' + hash;
  }
  return hash;
}

function fold (hash, text) {
  var i;
  var chr;
  var len;
  if (text.length === 0) {
    return hash;
  }
  for (i = 0, len = text.length; i < len; i++) {
    chr = text.charCodeAt(i);
    hash = ((hash << 5) - hash) + chr;
    hash |= 0;
  }
  return hash < 0 ? hash * -2 : hash;
}

function foldObject (hash, o, seen) {
  return Object.keys(o).sort().reduce(foldKey, hash);
  function foldKey (hash, key) {
    return foldValue(hash, o[key], key, seen);
  }
}

function foldValue (input, value, key, seen) {
  var hash = fold(fold(fold(input, key), toString(value)), typeof value);
  if (value === null) {
    return fold(hash, 'null');
  }
  if (value === undefined) {
    return fold(hash, 'undefined');
  }
  if (typeof value === 'object' || typeof value === 'function') {
    if (seen.indexOf(value) !== -1) {
      return fold(hash, '[Circular]' + key);
    }
    seen.push(value);

    var objHash = foldObject(hash, value, seen);

    if (!('valueOf' in value) || typeof value.valueOf !== 'function') {
      return objHash;
    }

    try {
      return fold(objHash, String(value.valueOf()))
    } catch (err) {
      return fold(objHash, '[valueOf exception]' + (err.stack || err.message))
    }
  }
  return fold(hash, value.toString());
}

function toString (o) {
  return Object.prototype.toString.call(o);
}

function sum (o) {
  return pad(foldValue(0, o, '', []).toString(16), 8);
}

var hashSum = sum;

const CSS_VARS_HELPER = `useCssVars`;
function genCssVarsFromList(vars, id, isProd, isSSR = false) {
    return `{\n  ${vars
        .map(key => `"${isSSR ? `--` : ``}${genVarName(id, key, isProd)}": (${key})`)
        .join(',\n  ')}\n}`;
}
function genVarName(id, raw, isProd) {
    if (isProd) {
        return hashSum(id + raw);
    }
    else {
        return `${id}-${raw.replace(/([^\w-])/g, '_')}`;
    }
}
function normalizeExpression(exp) {
    exp = exp.trim();
    if ((exp[0] === `'` && exp[exp.length - 1] === `'`) ||
        (exp[0] === `"` && exp[exp.length - 1] === `"`)) {
        return exp.slice(1, -1);
    }
    return exp;
}
const vBindRE = /v-bind\s*\(/g;
function parseCssVars(sfc) {
    const vars = [];
    sfc.styles.forEach(style => {
        let match;
        // ignore v-bind() in comments /* ... */
        const content = style.content.replace(/\/\*([\s\S]*?)\*\//g, '');
        while ((match = vBindRE.exec(content))) {
            const start = match.index + match[0].length;
            const end = lexBinding(content, start);
            if (end !== null) {
                const variable = normalizeExpression(content.slice(start, end));
                if (!vars.includes(variable)) {
                    vars.push(variable);
                }
            }
        }
    });
    return vars;
}
function lexBinding(content, start) {
    let state = 0 /* inParens */;
    let parenDepth = 0;
    for (let i = start; i < content.length; i++) {
        const char = content.charAt(i);
        switch (state) {
            case 0 /* inParens */:
                if (char === `'`) {
                    state = 1 /* inSingleQuoteString */;
                }
                else if (char === `"`) {
                    state = 2 /* inDoubleQuoteString */;
                }
                else if (char === `(`) {
                    parenDepth++;
                }
                else if (char === `)`) {
                    if (parenDepth > 0) {
                        parenDepth--;
                    }
                    else {
                        return i;
                    }
                }
                break;
            case 1 /* inSingleQuoteString */:
                if (char === `'`) {
                    state = 0 /* inParens */;
                }
                break;
            case 2 /* inDoubleQuoteString */:
                if (char === `"`) {
                    state = 0 /* inParens */;
                }
                break;
        }
    }
    return null;
}
const cssVarsPlugin = opts => {
    const { id, isProd } = opts;
    return {
        postcssPlugin: 'vue-sfc-vars',
        Declaration(decl) {
            // rewrite CSS variables
            const value = decl.value;
            if (vBindRE.test(value)) {
                vBindRE.lastIndex = 0;
                let transformed = '';
                let lastIndex = 0;
                let match;
                while ((match = vBindRE.exec(value))) {
                    const start = match.index + match[0].length;
                    const end = lexBinding(value, start);
                    if (end !== null) {
                        const variable = normalizeExpression(value.slice(start, end));
                        transformed +=
                            value.slice(lastIndex, match.index) +
                                `var(--${genVarName(id, variable, isProd)})`;
                        lastIndex = end + 1;
                    }
                }
                decl.value = transformed + value.slice(lastIndex);
            }
        }
    };
};
cssVarsPlugin.postcss = true;
function genCssVarsCode(vars, bindings, id, isProd) {
    const varsExp = genCssVarsFromList(vars, id, isProd);
    const exp = createSimpleExpression(varsExp, false);
    const context = createTransformContext(createRoot([]), {
        prefixIdentifiers: true,
        inline: true,
        bindingMetadata: bindings.__isScriptSetup === false ? undefined : bindings
    });
    const transformed = processExpression(exp, context);
    const transformedString = transformed.type === 4 /* SIMPLE_EXPRESSION */
        ? transformed.content
        : transformed.children
            .map(c => {
            return typeof c === 'string'
                ? c
                : c.content;
        })
            .join('');
    return `_${CSS_VARS_HELPER}(_ctx => (${transformedString}))`;
}
// <script setup> already gets the calls injected as part of the transform
// this is only for single normal <script>
function genNormalScriptCssVarsCode(cssVars, bindings, id, isProd) {
    return (`\nimport { ${CSS_VARS_HELPER} as _${CSS_VARS_HELPER} } from 'vue'\n` +
        `const __injectCSSVars__ = () => {\n${genCssVarsCode(cssVars, bindings, id, isProd)}}\n` +
        `const __setup__ = __default__.setup\n` +
        `__default__.setup = __setup__\n` +
        `  ? (props, ctx) => { __injectCSSVars__();return __setup__(props, ctx) }\n` +
        `  : __injectCSSVars__\n`);
}

function createCache(size = 500) {
    return new Map()
        ;
}

var global = (typeof global !== "undefined" ? global :
  typeof self !== "undefined" ? self :
  typeof window !== "undefined" ? window : {});

var lookup = [];
var revLookup = [];
var Arr = typeof Uint8Array !== 'undefined' ? Uint8Array : Array;
var inited = false;
function init () {
  inited = true;
  var code = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
  for (var i = 0, len = code.length; i < len; ++i) {
    lookup[i] = code[i];
    revLookup[code.charCodeAt(i)] = i;
  }

  revLookup['-'.charCodeAt(0)] = 62;
  revLookup['_'.charCodeAt(0)] = 63;
}

function toByteArray (b64) {
  if (!inited) {
    init();
  }
  var i, j, l, tmp, placeHolders, arr;
  var len = b64.length;

  if (len % 4 > 0) {
    throw new Error('Invalid string. Length must be a multiple of 4')
  }

  // the number of equal signs (place holders)
  // if there are two placeholders, than the two characters before it
  // represent one byte
  // if there is only one, then the three characters before it represent 2 bytes
  // this is just a cheap hack to not do indexOf twice
  placeHolders = b64[len - 2] === '=' ? 2 : b64[len - 1] === '=' ? 1 : 0;

  // base64 is 4/3 + up to two characters of the original data
  arr = new Arr(len * 3 / 4 - placeHolders);

  // if there are placeholders, only get up to the last complete 4 chars
  l = placeHolders > 0 ? len - 4 : len;

  var L = 0;

  for (i = 0, j = 0; i < l; i += 4, j += 3) {
    tmp = (revLookup[b64.charCodeAt(i)] << 18) | (revLookup[b64.charCodeAt(i + 1)] << 12) | (revLookup[b64.charCodeAt(i + 2)] << 6) | revLookup[b64.charCodeAt(i + 3)];
    arr[L++] = (tmp >> 16) & 0xFF;
    arr[L++] = (tmp >> 8) & 0xFF;
    arr[L++] = tmp & 0xFF;
  }

  if (placeHolders === 2) {
    tmp = (revLookup[b64.charCodeAt(i)] << 2) | (revLookup[b64.charCodeAt(i + 1)] >> 4);
    arr[L++] = tmp & 0xFF;
  } else if (placeHolders === 1) {
    tmp = (revLookup[b64.charCodeAt(i)] << 10) | (revLookup[b64.charCodeAt(i + 1)] << 4) | (revLookup[b64.charCodeAt(i + 2)] >> 2);
    arr[L++] = (tmp >> 8) & 0xFF;
    arr[L++] = tmp & 0xFF;
  }

  return arr
}

function tripletToBase64 (num) {
  return lookup[num >> 18 & 0x3F] + lookup[num >> 12 & 0x3F] + lookup[num >> 6 & 0x3F] + lookup[num & 0x3F]
}

function encodeChunk (uint8, start, end) {
  var tmp;
  var output = [];
  for (var i = start; i < end; i += 3) {
    tmp = (uint8[i] << 16) + (uint8[i + 1] << 8) + (uint8[i + 2]);
    output.push(tripletToBase64(tmp));
  }
  return output.join('')
}

function fromByteArray (uint8) {
  if (!inited) {
    init();
  }
  var tmp;
  var len = uint8.length;
  var extraBytes = len % 3; // if we have 1 byte left, pad 2 bytes
  var output = '';
  var parts = [];
  var maxChunkLength = 16383; // must be multiple of 3

  // go through the array every three bytes, we'll deal with trailing stuff later
  for (var i = 0, len2 = len - extraBytes; i < len2; i += maxChunkLength) {
    parts.push(encodeChunk(uint8, i, (i + maxChunkLength) > len2 ? len2 : (i + maxChunkLength)));
  }

  // pad the end with zeros, but make sure to not forget the extra bytes
  if (extraBytes === 1) {
    tmp = uint8[len - 1];
    output += lookup[tmp >> 2];
    output += lookup[(tmp << 4) & 0x3F];
    output += '==';
  } else if (extraBytes === 2) {
    tmp = (uint8[len - 2] << 8) + (uint8[len - 1]);
    output += lookup[tmp >> 10];
    output += lookup[(tmp >> 4) & 0x3F];
    output += lookup[(tmp << 2) & 0x3F];
    output += '=';
  }

  parts.push(output);

  return parts.join('')
}

function read (buffer, offset, isLE, mLen, nBytes) {
  var e, m;
  var eLen = nBytes * 8 - mLen - 1;
  var eMax = (1 << eLen) - 1;
  var eBias = eMax >> 1;
  var nBits = -7;
  var i = isLE ? (nBytes - 1) : 0;
  var d = isLE ? -1 : 1;
  var s = buffer[offset + i];

  i += d;

  e = s & ((1 << (-nBits)) - 1);
  s >>= (-nBits);
  nBits += eLen;
  for (; nBits > 0; e = e * 256 + buffer[offset + i], i += d, nBits -= 8) {}

  m = e & ((1 << (-nBits)) - 1);
  e >>= (-nBits);
  nBits += mLen;
  for (; nBits > 0; m = m * 256 + buffer[offset + i], i += d, nBits -= 8) {}

  if (e === 0) {
    e = 1 - eBias;
  } else if (e === eMax) {
    return m ? NaN : ((s ? -1 : 1) * Infinity)
  } else {
    m = m + Math.pow(2, mLen);
    e = e - eBias;
  }
  return (s ? -1 : 1) * m * Math.pow(2, e - mLen)
}

function write (buffer, value, offset, isLE, mLen, nBytes) {
  var e, m, c;
  var eLen = nBytes * 8 - mLen - 1;
  var eMax = (1 << eLen) - 1;
  var eBias = eMax >> 1;
  var rt = (mLen === 23 ? Math.pow(2, -24) - Math.pow(2, -77) : 0);
  var i = isLE ? 0 : (nBytes - 1);
  var d = isLE ? 1 : -1;
  var s = value < 0 || (value === 0 && 1 / value < 0) ? 1 : 0;

  value = Math.abs(value);

  if (isNaN(value) || value === Infinity) {
    m = isNaN(value) ? 1 : 0;
    e = eMax;
  } else {
    e = Math.floor(Math.log(value) / Math.LN2);
    if (value * (c = Math.pow(2, -e)) < 1) {
      e--;
      c *= 2;
    }
    if (e + eBias >= 1) {
      value += rt / c;
    } else {
      value += rt * Math.pow(2, 1 - eBias);
    }
    if (value * c >= 2) {
      e++;
      c /= 2;
    }

    if (e + eBias >= eMax) {
      m = 0;
      e = eMax;
    } else if (e + eBias >= 1) {
      m = (value * c - 1) * Math.pow(2, mLen);
      e = e + eBias;
    } else {
      m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen);
      e = 0;
    }
  }

  for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {}

  e = (e << mLen) | m;
  eLen += mLen;
  for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {}

  buffer[offset + i - d] |= s * 128;
}

var toString$1 = {}.toString;

var isArray$1 = Array.isArray || function (arr) {
  return toString$1.call(arr) == '[object Array]';
};

/*!
 * The buffer module from node.js, for the browser.
 *
 * @author   Feross Aboukhadijeh <feross@feross.org> <http://feross.org>
 * @license  MIT
 */

var INSPECT_MAX_BYTES = 50;

/**
 * If `Buffer.TYPED_ARRAY_SUPPORT`:
 *   === true    Use Uint8Array implementation (fastest)
 *   === false   Use Object implementation (most compatible, even IE6)
 *
 * Browsers that support typed arrays are IE 10+, Firefox 4+, Chrome 7+, Safari 5.1+,
 * Opera 11.6+, iOS 4.2+.
 *
 * Due to various browser bugs, sometimes the Object implementation will be used even
 * when the browser supports typed arrays.
 *
 * Note:
 *
 *   - Firefox 4-29 lacks support for adding new properties to `Uint8Array` instances,
 *     See: https://bugzilla.mozilla.org/show_bug.cgi?id=695438.
 *
 *   - Chrome 9-10 is missing the `TypedArray.prototype.subarray` function.
 *
 *   - IE10 has a broken `TypedArray.prototype.subarray` function which returns arrays of
 *     incorrect length in some situations.

 * We detect these buggy browsers and set `Buffer.TYPED_ARRAY_SUPPORT` to `false` so they
 * get the Object implementation, which is slower but behaves correctly.
 */
Buffer.TYPED_ARRAY_SUPPORT = global.TYPED_ARRAY_SUPPORT !== undefined
  ? global.TYPED_ARRAY_SUPPORT
  : true;

function kMaxLength () {
  return Buffer.TYPED_ARRAY_SUPPORT
    ? 0x7fffffff
    : 0x3fffffff
}

function createBuffer (that, length) {
  if (kMaxLength() < length) {
    throw new RangeError('Invalid typed array length')
  }
  if (Buffer.TYPED_ARRAY_SUPPORT) {
    // Return an augmented `Uint8Array` instance, for best performance
    that = new Uint8Array(length);
    that.__proto__ = Buffer.prototype;
  } else {
    // Fallback: Return an object instance of the Buffer class
    if (that === null) {
      that = new Buffer(length);
    }
    that.length = length;
  }

  return that
}

/**
 * The Buffer constructor returns instances of `Uint8Array` that have their
 * prototype changed to `Buffer.prototype`. Furthermore, `Buffer` is a subclass of
 * `Uint8Array`, so the returned instances will have all the node `Buffer` methods
 * and the `Uint8Array` methods. Square bracket notation works as expected -- it
 * returns a single octet.
 *
 * The `Uint8Array` prototype remains unmodified.
 */

function Buffer (arg, encodingOrOffset, length) {
  if (!Buffer.TYPED_ARRAY_SUPPORT && !(this instanceof Buffer)) {
    return new Buffer(arg, encodingOrOffset, length)
  }

  // Common case.
  if (typeof arg === 'number') {
    if (typeof encodingOrOffset === 'string') {
      throw new Error(
        'If encoding is specified then the first argument must be a string'
      )
    }
    return allocUnsafe(this, arg)
  }
  return from(this, arg, encodingOrOffset, length)
}

Buffer.poolSize = 8192; // not used by this implementation

// TODO: Legacy, not needed anymore. Remove in next major version.
Buffer._augment = function (arr) {
  arr.__proto__ = Buffer.prototype;
  return arr
};

function from (that, value, encodingOrOffset, length) {
  if (typeof value === 'number') {
    throw new TypeError('"value" argument must not be a number')
  }

  if (typeof ArrayBuffer !== 'undefined' && value instanceof ArrayBuffer) {
    return fromArrayBuffer(that, value, encodingOrOffset, length)
  }

  if (typeof value === 'string') {
    return fromString(that, value, encodingOrOffset)
  }

  return fromObject(that, value)
}

/**
 * Functionally equivalent to Buffer(arg, encoding) but throws a TypeError
 * if value is a number.
 * Buffer.from(str[, encoding])
 * Buffer.from(array)
 * Buffer.from(buffer)
 * Buffer.from(arrayBuffer[, byteOffset[, length]])
 **/
Buffer.from = function (value, encodingOrOffset, length) {
  return from(null, value, encodingOrOffset, length)
};

if (Buffer.TYPED_ARRAY_SUPPORT) {
  Buffer.prototype.__proto__ = Uint8Array.prototype;
  Buffer.__proto__ = Uint8Array;
}

function assertSize (size) {
  if (typeof size !== 'number') {
    throw new TypeError('"size" argument must be a number')
  } else if (size < 0) {
    throw new RangeError('"size" argument must not be negative')
  }
}

function alloc (that, size, fill, encoding) {
  assertSize(size);
  if (size <= 0) {
    return createBuffer(that, size)
  }
  if (fill !== undefined) {
    // Only pay attention to encoding if it's a string. This
    // prevents accidentally sending in a number that would
    // be interpretted as a start offset.
    return typeof encoding === 'string'
      ? createBuffer(that, size).fill(fill, encoding)
      : createBuffer(that, size).fill(fill)
  }
  return createBuffer(that, size)
}

/**
 * Creates a new filled Buffer instance.
 * alloc(size[, fill[, encoding]])
 **/
Buffer.alloc = function (size, fill, encoding) {
  return alloc(null, size, fill, encoding)
};

function allocUnsafe (that, size) {
  assertSize(size);
  that = createBuffer(that, size < 0 ? 0 : checked(size) | 0);
  if (!Buffer.TYPED_ARRAY_SUPPORT) {
    for (var i = 0; i < size; ++i) {
      that[i] = 0;
    }
  }
  return that
}

/**
 * Equivalent to Buffer(num), by default creates a non-zero-filled Buffer instance.
 * */
Buffer.allocUnsafe = function (size) {
  return allocUnsafe(null, size)
};
/**
 * Equivalent to SlowBuffer(num), by default creates a non-zero-filled Buffer instance.
 */
Buffer.allocUnsafeSlow = function (size) {
  return allocUnsafe(null, size)
};

function fromString (that, string, encoding) {
  if (typeof encoding !== 'string' || encoding === '') {
    encoding = 'utf8';
  }

  if (!Buffer.isEncoding(encoding)) {
    throw new TypeError('"encoding" must be a valid string encoding')
  }

  var length = byteLength(string, encoding) | 0;
  that = createBuffer(that, length);

  var actual = that.write(string, encoding);

  if (actual !== length) {
    // Writing a hex string, for example, that contains invalid characters will
    // cause everything after the first invalid character to be ignored. (e.g.
    // 'abxxcd' will be treated as 'ab')
    that = that.slice(0, actual);
  }

  return that
}

function fromArrayLike (that, array) {
  var length = array.length < 0 ? 0 : checked(array.length) | 0;
  that = createBuffer(that, length);
  for (var i = 0; i < length; i += 1) {
    that[i] = array[i] & 255;
  }
  return that
}

function fromArrayBuffer (that, array, byteOffset, length) {
  array.byteLength; // this throws if `array` is not a valid ArrayBuffer

  if (byteOffset < 0 || array.byteLength < byteOffset) {
    throw new RangeError('\'offset\' is out of bounds')
  }

  if (array.byteLength < byteOffset + (length || 0)) {
    throw new RangeError('\'length\' is out of bounds')
  }

  if (byteOffset === undefined && length === undefined) {
    array = new Uint8Array(array);
  } else if (length === undefined) {
    array = new Uint8Array(array, byteOffset);
  } else {
    array = new Uint8Array(array, byteOffset, length);
  }

  if (Buffer.TYPED_ARRAY_SUPPORT) {
    // Return an augmented `Uint8Array` instance, for best performance
    that = array;
    that.__proto__ = Buffer.prototype;
  } else {
    // Fallback: Return an object instance of the Buffer class
    that = fromArrayLike(that, array);
  }
  return that
}

function fromObject (that, obj) {
  if (internalIsBuffer(obj)) {
    var len = checked(obj.length) | 0;
    that = createBuffer(that, len);

    if (that.length === 0) {
      return that
    }

    obj.copy(that, 0, 0, len);
    return that
  }

  if (obj) {
    if ((typeof ArrayBuffer !== 'undefined' &&
        obj.buffer instanceof ArrayBuffer) || 'length' in obj) {
      if (typeof obj.length !== 'number' || isnan(obj.length)) {
        return createBuffer(that, 0)
      }
      return fromArrayLike(that, obj)
    }

    if (obj.type === 'Buffer' && isArray$1(obj.data)) {
      return fromArrayLike(that, obj.data)
    }
  }

  throw new TypeError('First argument must be a string, Buffer, ArrayBuffer, Array, or array-like object.')
}

function checked (length) {
  // Note: cannot use `length < kMaxLength()` here because that fails when
  // length is NaN (which is otherwise coerced to zero.)
  if (length >= kMaxLength()) {
    throw new RangeError('Attempt to allocate Buffer larger than maximum ' +
                         'size: 0x' + kMaxLength().toString(16) + ' bytes')
  }
  return length | 0
}
Buffer.isBuffer = isBuffer;
function internalIsBuffer (b) {
  return !!(b != null && b._isBuffer)
}

Buffer.compare = function compare (a, b) {
  if (!internalIsBuffer(a) || !internalIsBuffer(b)) {
    throw new TypeError('Arguments must be Buffers')
  }

  if (a === b) return 0

  var x = a.length;
  var y = b.length;

  for (var i = 0, len = Math.min(x, y); i < len; ++i) {
    if (a[i] !== b[i]) {
      x = a[i];
      y = b[i];
      break
    }
  }

  if (x < y) return -1
  if (y < x) return 1
  return 0
};

Buffer.isEncoding = function isEncoding (encoding) {
  switch (String(encoding).toLowerCase()) {
    case 'hex':
    case 'utf8':
    case 'utf-8':
    case 'ascii':
    case 'latin1':
    case 'binary':
    case 'base64':
    case 'ucs2':
    case 'ucs-2':
    case 'utf16le':
    case 'utf-16le':
      return true
    default:
      return false
  }
};

Buffer.concat = function concat (list, length) {
  if (!isArray$1(list)) {
    throw new TypeError('"list" argument must be an Array of Buffers')
  }

  if (list.length === 0) {
    return Buffer.alloc(0)
  }

  var i;
  if (length === undefined) {
    length = 0;
    for (i = 0; i < list.length; ++i) {
      length += list[i].length;
    }
  }

  var buffer = Buffer.allocUnsafe(length);
  var pos = 0;
  for (i = 0; i < list.length; ++i) {
    var buf = list[i];
    if (!internalIsBuffer(buf)) {
      throw new TypeError('"list" argument must be an Array of Buffers')
    }
    buf.copy(buffer, pos);
    pos += buf.length;
  }
  return buffer
};

function byteLength (string, encoding) {
  if (internalIsBuffer(string)) {
    return string.length
  }
  if (typeof ArrayBuffer !== 'undefined' && typeof ArrayBuffer.isView === 'function' &&
      (ArrayBuffer.isView(string) || string instanceof ArrayBuffer)) {
    return string.byteLength
  }
  if (typeof string !== 'string') {
    string = '' + string;
  }

  var len = string.length;
  if (len === 0) return 0

  // Use a for loop to avoid recursion
  var loweredCase = false;
  for (;;) {
    switch (encoding) {
      case 'ascii':
      case 'latin1':
      case 'binary':
        return len
      case 'utf8':
      case 'utf-8':
      case undefined:
        return utf8ToBytes(string).length
      case 'ucs2':
      case 'ucs-2':
      case 'utf16le':
      case 'utf-16le':
        return len * 2
      case 'hex':
        return len >>> 1
      case 'base64':
        return base64ToBytes(string).length
      default:
        if (loweredCase) return utf8ToBytes(string).length // assume utf8
        encoding = ('' + encoding).toLowerCase();
        loweredCase = true;
    }
  }
}
Buffer.byteLength = byteLength;

function slowToString (encoding, start, end) {
  var loweredCase = false;

  // No need to verify that "this.length <= MAX_UINT32" since it's a read-only
  // property of a typed array.

  // This behaves neither like String nor Uint8Array in that we set start/end
  // to their upper/lower bounds if the value passed is out of range.
  // undefined is handled specially as per ECMA-262 6th Edition,
  // Section 13.3.3.7 Runtime Semantics: KeyedBindingInitialization.
  if (start === undefined || start < 0) {
    start = 0;
  }
  // Return early if start > this.length. Done here to prevent potential uint32
  // coercion fail below.
  if (start > this.length) {
    return ''
  }

  if (end === undefined || end > this.length) {
    end = this.length;
  }

  if (end <= 0) {
    return ''
  }

  // Force coersion to uint32. This will also coerce falsey/NaN values to 0.
  end >>>= 0;
  start >>>= 0;

  if (end <= start) {
    return ''
  }

  if (!encoding) encoding = 'utf8';

  while (true) {
    switch (encoding) {
      case 'hex':
        return hexSlice(this, start, end)

      case 'utf8':
      case 'utf-8':
        return utf8Slice(this, start, end)

      case 'ascii':
        return asciiSlice(this, start, end)

      case 'latin1':
      case 'binary':
        return latin1Slice(this, start, end)

      case 'base64':
        return base64Slice(this, start, end)

      case 'ucs2':
      case 'ucs-2':
      case 'utf16le':
      case 'utf-16le':
        return utf16leSlice(this, start, end)

      default:
        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)
        encoding = (encoding + '').toLowerCase();
        loweredCase = true;
    }
  }
}

// The property is used by `Buffer.isBuffer` and `is-buffer` (in Safari 5-7) to detect
// Buffer instances.
Buffer.prototype._isBuffer = true;

function swap$1 (b, n, m) {
  var i = b[n];
  b[n] = b[m];
  b[m] = i;
}

Buffer.prototype.swap16 = function swap16 () {
  var len = this.length;
  if (len % 2 !== 0) {
    throw new RangeError('Buffer size must be a multiple of 16-bits')
  }
  for (var i = 0; i < len; i += 2) {
    swap$1(this, i, i + 1);
  }
  return this
};

Buffer.prototype.swap32 = function swap32 () {
  var len = this.length;
  if (len % 4 !== 0) {
    throw new RangeError('Buffer size must be a multiple of 32-bits')
  }
  for (var i = 0; i < len; i += 4) {
    swap$1(this, i, i + 3);
    swap$1(this, i + 1, i + 2);
  }
  return this
};

Buffer.prototype.swap64 = function swap64 () {
  var len = this.length;
  if (len % 8 !== 0) {
    throw new RangeError('Buffer size must be a multiple of 64-bits')
  }
  for (var i = 0; i < len; i += 8) {
    swap$1(this, i, i + 7);
    swap$1(this, i + 1, i + 6);
    swap$1(this, i + 2, i + 5);
    swap$1(this, i + 3, i + 4);
  }
  return this
};

Buffer.prototype.toString = function toString () {
  var length = this.length | 0;
  if (length === 0) return ''
  if (arguments.length === 0) return utf8Slice(this, 0, length)
  return slowToString.apply(this, arguments)
};

Buffer.prototype.equals = function equals (b) {
  if (!internalIsBuffer(b)) throw new TypeError('Argument must be a Buffer')
  if (this === b) return true
  return Buffer.compare(this, b) === 0
};

Buffer.prototype.inspect = function inspect () {
  var str = '';
  var max = INSPECT_MAX_BYTES;
  if (this.length > 0) {
    str = this.toString('hex', 0, max).match(/.{2}/g).join(' ');
    if (this.length > max) str += ' ... ';
  }
  return '<Buffer ' + str + '>'
};

Buffer.prototype.compare = function compare (target, start, end, thisStart, thisEnd) {
  if (!internalIsBuffer(target)) {
    throw new TypeError('Argument must be a Buffer')
  }

  if (start === undefined) {
    start = 0;
  }
  if (end === undefined) {
    end = target ? target.length : 0;
  }
  if (thisStart === undefined) {
    thisStart = 0;
  }
  if (thisEnd === undefined) {
    thisEnd = this.length;
  }

  if (start < 0 || end > target.length || thisStart < 0 || thisEnd > this.length) {
    throw new RangeError('out of range index')
  }

  if (thisStart >= thisEnd && start >= end) {
    return 0
  }
  if (thisStart >= thisEnd) {
    return -1
  }
  if (start >= end) {
    return 1
  }

  start >>>= 0;
  end >>>= 0;
  thisStart >>>= 0;
  thisEnd >>>= 0;

  if (this === target) return 0

  var x = thisEnd - thisStart;
  var y = end - start;
  var len = Math.min(x, y);

  var thisCopy = this.slice(thisStart, thisEnd);
  var targetCopy = target.slice(start, end);

  for (var i = 0; i < len; ++i) {
    if (thisCopy[i] !== targetCopy[i]) {
      x = thisCopy[i];
      y = targetCopy[i];
      break
    }
  }

  if (x < y) return -1
  if (y < x) return 1
  return 0
};

// Finds either the first index of `val` in `buffer` at offset >= `byteOffset`,
// OR the last index of `val` in `buffer` at offset <= `byteOffset`.
//
// Arguments:
// - buffer - a Buffer to search
// - val - a string, Buffer, or number
// - byteOffset - an index into `buffer`; will be clamped to an int32
// - encoding - an optional encoding, relevant is val is a string
// - dir - true for indexOf, false for lastIndexOf
function bidirectionalIndexOf (buffer, val, byteOffset, encoding, dir) {
  // Empty buffer means no match
  if (buffer.length === 0) return -1

  // Normalize byteOffset
  if (typeof byteOffset === 'string') {
    encoding = byteOffset;
    byteOffset = 0;
  } else if (byteOffset > 0x7fffffff) {
    byteOffset = 0x7fffffff;
  } else if (byteOffset < -0x80000000) {
    byteOffset = -0x80000000;
  }
  byteOffset = +byteOffset;  // Coerce to Number.
  if (isNaN(byteOffset)) {
    // byteOffset: it it's undefined, null, NaN, "foo", etc, search whole buffer
    byteOffset = dir ? 0 : (buffer.length - 1);
  }

  // Normalize byteOffset: negative offsets start from the end of the buffer
  if (byteOffset < 0) byteOffset = buffer.length + byteOffset;
  if (byteOffset >= buffer.length) {
    if (dir) return -1
    else byteOffset = buffer.length - 1;
  } else if (byteOffset < 0) {
    if (dir) byteOffset = 0;
    else return -1
  }

  // Normalize val
  if (typeof val === 'string') {
    val = Buffer.from(val, encoding);
  }

  // Finally, search either indexOf (if dir is true) or lastIndexOf
  if (internalIsBuffer(val)) {
    // Special case: looking for empty string/buffer always fails
    if (val.length === 0) {
      return -1
    }
    return arrayIndexOf(buffer, val, byteOffset, encoding, dir)
  } else if (typeof val === 'number') {
    val = val & 0xFF; // Search for a byte value [0-255]
    if (Buffer.TYPED_ARRAY_SUPPORT &&
        typeof Uint8Array.prototype.indexOf === 'function') {
      if (dir) {
        return Uint8Array.prototype.indexOf.call(buffer, val, byteOffset)
      } else {
        return Uint8Array.prototype.lastIndexOf.call(buffer, val, byteOffset)
      }
    }
    return arrayIndexOf(buffer, [ val ], byteOffset, encoding, dir)
  }

  throw new TypeError('val must be string, number or Buffer')
}

function arrayIndexOf (arr, val, byteOffset, encoding, dir) {
  var indexSize = 1;
  var arrLength = arr.length;
  var valLength = val.length;

  if (encoding !== undefined) {
    encoding = String(encoding).toLowerCase();
    if (encoding === 'ucs2' || encoding === 'ucs-2' ||
        encoding === 'utf16le' || encoding === 'utf-16le') {
      if (arr.length < 2 || val.length < 2) {
        return -1
      }
      indexSize = 2;
      arrLength /= 2;
      valLength /= 2;
      byteOffset /= 2;
    }
  }

  function read (buf, i) {
    if (indexSize === 1) {
      return buf[i]
    } else {
      return buf.readUInt16BE(i * indexSize)
    }
  }

  var i;
  if (dir) {
    var foundIndex = -1;
    for (i = byteOffset; i < arrLength; i++) {
      if (read(arr, i) === read(val, foundIndex === -1 ? 0 : i - foundIndex)) {
        if (foundIndex === -1) foundIndex = i;
        if (i - foundIndex + 1 === valLength) return foundIndex * indexSize
      } else {
        if (foundIndex !== -1) i -= i - foundIndex;
        foundIndex = -1;
      }
    }
  } else {
    if (byteOffset + valLength > arrLength) byteOffset = arrLength - valLength;
    for (i = byteOffset; i >= 0; i--) {
      var found = true;
      for (var j = 0; j < valLength; j++) {
        if (read(arr, i + j) !== read(val, j)) {
          found = false;
          break
        }
      }
      if (found) return i
    }
  }

  return -1
}

Buffer.prototype.includes = function includes (val, byteOffset, encoding) {
  return this.indexOf(val, byteOffset, encoding) !== -1
};

Buffer.prototype.indexOf = function indexOf (val, byteOffset, encoding) {
  return bidirectionalIndexOf(this, val, byteOffset, encoding, true)
};

Buffer.prototype.lastIndexOf = function lastIndexOf (val, byteOffset, encoding) {
  return bidirectionalIndexOf(this, val, byteOffset, encoding, false)
};

function hexWrite (buf, string, offset, length) {
  offset = Number(offset) || 0;
  var remaining = buf.length - offset;
  if (!length) {
    length = remaining;
  } else {
    length = Number(length);
    if (length > remaining) {
      length = remaining;
    }
  }

  // must be an even number of digits
  var strLen = string.length;
  if (strLen % 2 !== 0) throw new TypeError('Invalid hex string')

  if (length > strLen / 2) {
    length = strLen / 2;
  }
  for (var i = 0; i < length; ++i) {
    var parsed = parseInt(string.substr(i * 2, 2), 16);
    if (isNaN(parsed)) return i
    buf[offset + i] = parsed;
  }
  return i
}

function utf8Write (buf, string, offset, length) {
  return blitBuffer(utf8ToBytes(string, buf.length - offset), buf, offset, length)
}

function asciiWrite (buf, string, offset, length) {
  return blitBuffer(asciiToBytes(string), buf, offset, length)
}

function latin1Write (buf, string, offset, length) {
  return asciiWrite(buf, string, offset, length)
}

function base64Write (buf, string, offset, length) {
  return blitBuffer(base64ToBytes(string), buf, offset, length)
}

function ucs2Write (buf, string, offset, length) {
  return blitBuffer(utf16leToBytes(string, buf.length - offset), buf, offset, length)
}

Buffer.prototype.write = function write (string, offset, length, encoding) {
  // Buffer#write(string)
  if (offset === undefined) {
    encoding = 'utf8';
    length = this.length;
    offset = 0;
  // Buffer#write(string, encoding)
  } else if (length === undefined && typeof offset === 'string') {
    encoding = offset;
    length = this.length;
    offset = 0;
  // Buffer#write(string, offset[, length][, encoding])
  } else if (isFinite(offset)) {
    offset = offset | 0;
    if (isFinite(length)) {
      length = length | 0;
      if (encoding === undefined) encoding = 'utf8';
    } else {
      encoding = length;
      length = undefined;
    }
  // legacy write(string, encoding, offset, length) - remove in v0.13
  } else {
    throw new Error(
      'Buffer.write(string, encoding, offset[, length]) is no longer supported'
    )
  }

  var remaining = this.length - offset;
  if (length === undefined || length > remaining) length = remaining;

  if ((string.length > 0 && (length < 0 || offset < 0)) || offset > this.length) {
    throw new RangeError('Attempt to write outside buffer bounds')
  }

  if (!encoding) encoding = 'utf8';

  var loweredCase = false;
  for (;;) {
    switch (encoding) {
      case 'hex':
        return hexWrite(this, string, offset, length)

      case 'utf8':
      case 'utf-8':
        return utf8Write(this, string, offset, length)

      case 'ascii':
        return asciiWrite(this, string, offset, length)

      case 'latin1':
      case 'binary':
        return latin1Write(this, string, offset, length)

      case 'base64':
        // Warning: maxLength not taken into account in base64Write
        return base64Write(this, string, offset, length)

      case 'ucs2':
      case 'ucs-2':
      case 'utf16le':
      case 'utf-16le':
        return ucs2Write(this, string, offset, length)

      default:
        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)
        encoding = ('' + encoding).toLowerCase();
        loweredCase = true;
    }
  }
};

Buffer.prototype.toJSON = function toJSON () {
  return {
    type: 'Buffer',
    data: Array.prototype.slice.call(this._arr || this, 0)
  }
};

function base64Slice (buf, start, end) {
  if (start === 0 && end === buf.length) {
    return fromByteArray(buf)
  } else {
    return fromByteArray(buf.slice(start, end))
  }
}

function utf8Slice (buf, start, end) {
  end = Math.min(buf.length, end);
  var res = [];

  var i = start;
  while (i < end) {
    var firstByte = buf[i];
    var codePoint = null;
    var bytesPerSequence = (firstByte > 0xEF) ? 4
      : (firstByte > 0xDF) ? 3
      : (firstByte > 0xBF) ? 2
      : 1;

    if (i + bytesPerSequence <= end) {
      var secondByte, thirdByte, fourthByte, tempCodePoint;

      switch (bytesPerSequence) {
        case 1:
          if (firstByte < 0x80) {
            codePoint = firstByte;
          }
          break
        case 2:
          secondByte = buf[i + 1];
          if ((secondByte & 0xC0) === 0x80) {
            tempCodePoint = (firstByte & 0x1F) << 0x6 | (secondByte & 0x3F);
            if (tempCodePoint > 0x7F) {
              codePoint = tempCodePoint;
            }
          }
          break
        case 3:
          secondByte = buf[i + 1];
          thirdByte = buf[i + 2];
          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80) {
            tempCodePoint = (firstByte & 0xF) << 0xC | (secondByte & 0x3F) << 0x6 | (thirdByte & 0x3F);
            if (tempCodePoint > 0x7FF && (tempCodePoint < 0xD800 || tempCodePoint > 0xDFFF)) {
              codePoint = tempCodePoint;
            }
          }
          break
        case 4:
          secondByte = buf[i + 1];
          thirdByte = buf[i + 2];
          fourthByte = buf[i + 3];
          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80 && (fourthByte & 0xC0) === 0x80) {
            tempCodePoint = (firstByte & 0xF) << 0x12 | (secondByte & 0x3F) << 0xC | (thirdByte & 0x3F) << 0x6 | (fourthByte & 0x3F);
            if (tempCodePoint > 0xFFFF && tempCodePoint < 0x110000) {
              codePoint = tempCodePoint;
            }
          }
      }
    }

    if (codePoint === null) {
      // we did not generate a valid codePoint so insert a
      // replacement char (U+FFFD) and advance only 1 byte
      codePoint = 0xFFFD;
      bytesPerSequence = 1;
    } else if (codePoint > 0xFFFF) {
      // encode to utf16 (surrogate pair dance)
      codePoint -= 0x10000;
      res.push(codePoint >>> 10 & 0x3FF | 0xD800);
      codePoint = 0xDC00 | codePoint & 0x3FF;
    }

    res.push(codePoint);
    i += bytesPerSequence;
  }

  return decodeCodePointsArray(res)
}

// Based on http://stackoverflow.com/a/22747272/680742, the browser with
// the lowest limit is Chrome, with 0x10000 args.
// We go 1 magnitude less, for safety
var MAX_ARGUMENTS_LENGTH = 0x1000;

function decodeCodePointsArray (codePoints) {
  var len = codePoints.length;
  if (len <= MAX_ARGUMENTS_LENGTH) {
    return String.fromCharCode.apply(String, codePoints) // avoid extra slice()
  }

  // Decode in chunks to avoid "call stack size exceeded".
  var res = '';
  var i = 0;
  while (i < len) {
    res += String.fromCharCode.apply(
      String,
      codePoints.slice(i, i += MAX_ARGUMENTS_LENGTH)
    );
  }
  return res
}

function asciiSlice (buf, start, end) {
  var ret = '';
  end = Math.min(buf.length, end);

  for (var i = start; i < end; ++i) {
    ret += String.fromCharCode(buf[i] & 0x7F);
  }
  return ret
}

function latin1Slice (buf, start, end) {
  var ret = '';
  end = Math.min(buf.length, end);

  for (var i = start; i < end; ++i) {
    ret += String.fromCharCode(buf[i]);
  }
  return ret
}

function hexSlice (buf, start, end) {
  var len = buf.length;

  if (!start || start < 0) start = 0;
  if (!end || end < 0 || end > len) end = len;

  var out = '';
  for (var i = start; i < end; ++i) {
    out += toHex(buf[i]);
  }
  return out
}

function utf16leSlice (buf, start, end) {
  var bytes = buf.slice(start, end);
  var res = '';
  for (var i = 0; i < bytes.length; i += 2) {
    res += String.fromCharCode(bytes[i] + bytes[i + 1] * 256);
  }
  return res
}

Buffer.prototype.slice = function slice (start, end) {
  var len = this.length;
  start = ~~start;
  end = end === undefined ? len : ~~end;

  if (start < 0) {
    start += len;
    if (start < 0) start = 0;
  } else if (start > len) {
    start = len;
  }

  if (end < 0) {
    end += len;
    if (end < 0) end = 0;
  } else if (end > len) {
    end = len;
  }

  if (end < start) end = start;

  var newBuf;
  if (Buffer.TYPED_ARRAY_SUPPORT) {
    newBuf = this.subarray(start, end);
    newBuf.__proto__ = Buffer.prototype;
  } else {
    var sliceLen = end - start;
    newBuf = new Buffer(sliceLen, undefined);
    for (var i = 0; i < sliceLen; ++i) {
      newBuf[i] = this[i + start];
    }
  }

  return newBuf
};

/*
 * Need to make sure that buffer isn't trying to write out of bounds.
 */
function checkOffset (offset, ext, length) {
  if ((offset % 1) !== 0 || offset < 0) throw new RangeError('offset is not uint')
  if (offset + ext > length) throw new RangeError('Trying to access beyond buffer length')
}

Buffer.prototype.readUIntLE = function readUIntLE (offset, byteLength, noAssert) {
  offset = offset | 0;
  byteLength = byteLength | 0;
  if (!noAssert) checkOffset(offset, byteLength, this.length);

  var val = this[offset];
  var mul = 1;
  var i = 0;
  while (++i < byteLength && (mul *= 0x100)) {
    val += this[offset + i] * mul;
  }

  return val
};

Buffer.prototype.readUIntBE = function readUIntBE (offset, byteLength, noAssert) {
  offset = offset | 0;
  byteLength = byteLength | 0;
  if (!noAssert) {
    checkOffset(offset, byteLength, this.length);
  }

  var val = this[offset + --byteLength];
  var mul = 1;
  while (byteLength > 0 && (mul *= 0x100)) {
    val += this[offset + --byteLength] * mul;
  }

  return val
};

Buffer.prototype.readUInt8 = function readUInt8 (offset, noAssert) {
  if (!noAssert) checkOffset(offset, 1, this.length);
  return this[offset]
};

Buffer.prototype.readUInt16LE = function readUInt16LE (offset, noAssert) {
  if (!noAssert) checkOffset(offset, 2, this.length);
  return this[offset] | (this[offset + 1] << 8)
};

Buffer.prototype.readUInt16BE = function readUInt16BE (offset, noAssert) {
  if (!noAssert) checkOffset(offset, 2, this.length);
  return (this[offset] << 8) | this[offset + 1]
};

Buffer.prototype.readUInt32LE = function readUInt32LE (offset, noAssert) {
  if (!noAssert) checkOffset(offset, 4, this.length);

  return ((this[offset]) |
      (this[offset + 1] << 8) |
      (this[offset + 2] << 16)) +
      (this[offset + 3] * 0x1000000)
};

Buffer.prototype.readUInt32BE = function readUInt32BE (offset, noAssert) {
  if (!noAssert) checkOffset(offset, 4, this.length);

  return (this[offset] * 0x1000000) +
    ((this[offset + 1] << 16) |
    (this[offset + 2] << 8) |
    this[offset + 3])
};

Buffer.prototype.readIntLE = function readIntLE (offset, byteLength, noAssert) {
  offset = offset | 0;
  byteLength = byteLength | 0;
  if (!noAssert) checkOffset(offset, byteLength, this.length);

  var val = this[offset];
  var mul = 1;
  var i = 0;
  while (++i < byteLength && (mul *= 0x100)) {
    val += this[offset + i] * mul;
  }
  mul *= 0x80;

  if (val >= mul) val -= Math.pow(2, 8 * byteLength);

  return val
};

Buffer.prototype.readIntBE = function readIntBE (offset, byteLength, noAssert) {
  offset = offset | 0;
  byteLength = byteLength | 0;
  if (!noAssert) checkOffset(offset, byteLength, this.length);

  var i = byteLength;
  var mul = 1;
  var val = this[offset + --i];
  while (i > 0 && (mul *= 0x100)) {
    val += this[offset + --i] * mul;
  }
  mul *= 0x80;

  if (val >= mul) val -= Math.pow(2, 8 * byteLength);

  return val
};

Buffer.prototype.readInt8 = function readInt8 (offset, noAssert) {
  if (!noAssert) checkOffset(offset, 1, this.length);
  if (!(this[offset] & 0x80)) return (this[offset])
  return ((0xff - this[offset] + 1) * -1)
};

Buffer.prototype.readInt16LE = function readInt16LE (offset, noAssert) {
  if (!noAssert) checkOffset(offset, 2, this.length);
  var val = this[offset] | (this[offset + 1] << 8);
  return (val & 0x8000) ? val | 0xFFFF0000 : val
};

Buffer.prototype.readInt16BE = function readInt16BE (offset, noAssert) {
  if (!noAssert) checkOffset(offset, 2, this.length);
  var val = this[offset + 1] | (this[offset] << 8);
  return (val & 0x8000) ? val | 0xFFFF0000 : val
};

Buffer.prototype.readInt32LE = function readInt32LE (offset, noAssert) {
  if (!noAssert) checkOffset(offset, 4, this.length);

  return (this[offset]) |
    (this[offset + 1] << 8) |
    (this[offset + 2] << 16) |
    (this[offset + 3] << 24)
};

Buffer.prototype.readInt32BE = function readInt32BE (offset, noAssert) {
  if (!noAssert) checkOffset(offset, 4, this.length);

  return (this[offset] << 24) |
    (this[offset + 1] << 16) |
    (this[offset + 2] << 8) |
    (this[offset + 3])
};

Buffer.prototype.readFloatLE = function readFloatLE (offset, noAssert) {
  if (!noAssert) checkOffset(offset, 4, this.length);
  return read(this, offset, true, 23, 4)
};

Buffer.prototype.readFloatBE = function readFloatBE (offset, noAssert) {
  if (!noAssert) checkOffset(offset, 4, this.length);
  return read(this, offset, false, 23, 4)
};

Buffer.prototype.readDoubleLE = function readDoubleLE (offset, noAssert) {
  if (!noAssert) checkOffset(offset, 8, this.length);
  return read(this, offset, true, 52, 8)
};

Buffer.prototype.readDoubleBE = function readDoubleBE (offset, noAssert) {
  if (!noAssert) checkOffset(offset, 8, this.length);
  return read(this, offset, false, 52, 8)
};

function checkInt (buf, value, offset, ext, max, min) {
  if (!internalIsBuffer(buf)) throw new TypeError('"buffer" argument must be a Buffer instance')
  if (value > max || value < min) throw new RangeError('"value" argument is out of bounds')
  if (offset + ext > buf.length) throw new RangeError('Index out of range')
}

Buffer.prototype.writeUIntLE = function writeUIntLE (value, offset, byteLength, noAssert) {
  value = +value;
  offset = offset | 0;
  byteLength = byteLength | 0;
  if (!noAssert) {
    var maxBytes = Math.pow(2, 8 * byteLength) - 1;
    checkInt(this, value, offset, byteLength, maxBytes, 0);
  }

  var mul = 1;
  var i = 0;
  this[offset] = value & 0xFF;
  while (++i < byteLength && (mul *= 0x100)) {
    this[offset + i] = (value / mul) & 0xFF;
  }

  return offset + byteLength
};

Buffer.prototype.writeUIntBE = function writeUIntBE (value, offset, byteLength, noAssert) {
  value = +value;
  offset = offset | 0;
  byteLength = byteLength | 0;
  if (!noAssert) {
    var maxBytes = Math.pow(2, 8 * byteLength) - 1;
    checkInt(this, value, offset, byteLength, maxBytes, 0);
  }

  var i = byteLength - 1;
  var mul = 1;
  this[offset + i] = value & 0xFF;
  while (--i >= 0 && (mul *= 0x100)) {
    this[offset + i] = (value / mul) & 0xFF;
  }

  return offset + byteLength
};

Buffer.prototype.writeUInt8 = function writeUInt8 (value, offset, noAssert) {
  value = +value;
  offset = offset | 0;
  if (!noAssert) checkInt(this, value, offset, 1, 0xff, 0);
  if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value);
  this[offset] = (value & 0xff);
  return offset + 1
};

function objectWriteUInt16 (buf, value, offset, littleEndian) {
  if (value < 0) value = 0xffff + value + 1;
  for (var i = 0, j = Math.min(buf.length - offset, 2); i < j; ++i) {
    buf[offset + i] = (value & (0xff << (8 * (littleEndian ? i : 1 - i)))) >>>
      (littleEndian ? i : 1 - i) * 8;
  }
}

Buffer.prototype.writeUInt16LE = function writeUInt16LE (value, offset, noAssert) {
  value = +value;
  offset = offset | 0;
  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0);
  if (Buffer.TYPED_ARRAY_SUPPORT) {
    this[offset] = (value & 0xff);
    this[offset + 1] = (value >>> 8);
  } else {
    objectWriteUInt16(this, value, offset, true);
  }
  return offset + 2
};

Buffer.prototype.writeUInt16BE = function writeUInt16BE (value, offset, noAssert) {
  value = +value;
  offset = offset | 0;
  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0);
  if (Buffer.TYPED_ARRAY_SUPPORT) {
    this[offset] = (value >>> 8);
    this[offset + 1] = (value & 0xff);
  } else {
    objectWriteUInt16(this, value, offset, false);
  }
  return offset + 2
};

function objectWriteUInt32 (buf, value, offset, littleEndian) {
  if (value < 0) value = 0xffffffff + value + 1;
  for (var i = 0, j = Math.min(buf.length - offset, 4); i < j; ++i) {
    buf[offset + i] = (value >>> (littleEndian ? i : 3 - i) * 8) & 0xff;
  }
}

Buffer.prototype.writeUInt32LE = function writeUInt32LE (value, offset, noAssert) {
  value = +value;
  offset = offset | 0;
  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0);
  if (Buffer.TYPED_ARRAY_SUPPORT) {
    this[offset + 3] = (value >>> 24);
    this[offset + 2] = (value >>> 16);
    this[offset + 1] = (value >>> 8);
    this[offset] = (value & 0xff);
  } else {
    objectWriteUInt32(this, value, offset, true);
  }
  return offset + 4
};

Buffer.prototype.writeUInt32BE = function writeUInt32BE (value, offset, noAssert) {
  value = +value;
  offset = offset | 0;
  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0);
  if (Buffer.TYPED_ARRAY_SUPPORT) {
    this[offset] = (value >>> 24);
    this[offset + 1] = (value >>> 16);
    this[offset + 2] = (value >>> 8);
    this[offset + 3] = (value & 0xff);
  } else {
    objectWriteUInt32(this, value, offset, false);
  }
  return offset + 4
};

Buffer.prototype.writeIntLE = function writeIntLE (value, offset, byteLength, noAssert) {
  value = +value;
  offset = offset | 0;
  if (!noAssert) {
    var limit = Math.pow(2, 8 * byteLength - 1);

    checkInt(this, value, offset, byteLength, limit - 1, -limit);
  }

  var i = 0;
  var mul = 1;
  var sub = 0;
  this[offset] = value & 0xFF;
  while (++i < byteLength && (mul *= 0x100)) {
    if (value < 0 && sub === 0 && this[offset + i - 1] !== 0) {
      sub = 1;
    }
    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF;
  }

  return offset + byteLength
};

Buffer.prototype.writeIntBE = function writeIntBE (value, offset, byteLength, noAssert) {
  value = +value;
  offset = offset | 0;
  if (!noAssert) {
    var limit = Math.pow(2, 8 * byteLength - 1);

    checkInt(this, value, offset, byteLength, limit - 1, -limit);
  }

  var i = byteLength - 1;
  var mul = 1;
  var sub = 0;
  this[offset + i] = value & 0xFF;
  while (--i >= 0 && (mul *= 0x100)) {
    if (value < 0 && sub === 0 && this[offset + i + 1] !== 0) {
      sub = 1;
    }
    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF;
  }

  return offset + byteLength
};

Buffer.prototype.writeInt8 = function writeInt8 (value, offset, noAssert) {
  value = +value;
  offset = offset | 0;
  if (!noAssert) checkInt(this, value, offset, 1, 0x7f, -0x80);
  if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value);
  if (value < 0) value = 0xff + value + 1;
  this[offset] = (value & 0xff);
  return offset + 1
};

Buffer.prototype.writeInt16LE = function writeInt16LE (value, offset, noAssert) {
  value = +value;
  offset = offset | 0;
  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000);
  if (Buffer.TYPED_ARRAY_SUPPORT) {
    this[offset] = (value & 0xff);
    this[offset + 1] = (value >>> 8);
  } else {
    objectWriteUInt16(this, value, offset, true);
  }
  return offset + 2
};

Buffer.prototype.writeInt16BE = function writeInt16BE (value, offset, noAssert) {
  value = +value;
  offset = offset | 0;
  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000);
  if (Buffer.TYPED_ARRAY_SUPPORT) {
    this[offset] = (value >>> 8);
    this[offset + 1] = (value & 0xff);
  } else {
    objectWriteUInt16(this, value, offset, false);
  }
  return offset + 2
};

Buffer.prototype.writeInt32LE = function writeInt32LE (value, offset, noAssert) {
  value = +value;
  offset = offset | 0;
  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000);
  if (Buffer.TYPED_ARRAY_SUPPORT) {
    this[offset] = (value & 0xff);
    this[offset + 1] = (value >>> 8);
    this[offset + 2] = (value >>> 16);
    this[offset + 3] = (value >>> 24);
  } else {
    objectWriteUInt32(this, value, offset, true);
  }
  return offset + 4
};

Buffer.prototype.writeInt32BE = function writeInt32BE (value, offset, noAssert) {
  value = +value;
  offset = offset | 0;
  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000);
  if (value < 0) value = 0xffffffff + value + 1;
  if (Buffer.TYPED_ARRAY_SUPPORT) {
    this[offset] = (value >>> 24);
    this[offset + 1] = (value >>> 16);
    this[offset + 2] = (value >>> 8);
    this[offset + 3] = (value & 0xff);
  } else {
    objectWriteUInt32(this, value, offset, false);
  }
  return offset + 4
};

function checkIEEE754 (buf, value, offset, ext, max, min) {
  if (offset + ext > buf.length) throw new RangeError('Index out of range')
  if (offset < 0) throw new RangeError('Index out of range')
}

function writeFloat (buf, value, offset, littleEndian, noAssert) {
  if (!noAssert) {
    checkIEEE754(buf, value, offset, 4);
  }
  write(buf, value, offset, littleEndian, 23, 4);
  return offset + 4
}

Buffer.prototype.writeFloatLE = function writeFloatLE (value, offset, noAssert) {
  return writeFloat(this, value, offset, true, noAssert)
};

Buffer.prototype.writeFloatBE = function writeFloatBE (value, offset, noAssert) {
  return writeFloat(this, value, offset, false, noAssert)
};

function writeDouble (buf, value, offset, littleEndian, noAssert) {
  if (!noAssert) {
    checkIEEE754(buf, value, offset, 8);
  }
  write(buf, value, offset, littleEndian, 52, 8);
  return offset + 8
}

Buffer.prototype.writeDoubleLE = function writeDoubleLE (value, offset, noAssert) {
  return writeDouble(this, value, offset, true, noAssert)
};

Buffer.prototype.writeDoubleBE = function writeDoubleBE (value, offset, noAssert) {
  return writeDouble(this, value, offset, false, noAssert)
};

// copy(targetBuffer, targetStart=0, sourceStart=0, sourceEnd=buffer.length)
Buffer.prototype.copy = function copy (target, targetStart, start, end) {
  if (!start) start = 0;
  if (!end && end !== 0) end = this.length;
  if (targetStart >= target.length) targetStart = target.length;
  if (!targetStart) targetStart = 0;
  if (end > 0 && end < start) end = start;

  // Copy 0 bytes; we're done
  if (end === start) return 0
  if (target.length === 0 || this.length === 0) return 0

  // Fatal error conditions
  if (targetStart < 0) {
    throw new RangeError('targetStart out of bounds')
  }
  if (start < 0 || start >= this.length) throw new RangeError('sourceStart out of bounds')
  if (end < 0) throw new RangeError('sourceEnd out of bounds')

  // Are we oob?
  if (end > this.length) end = this.length;
  if (target.length - targetStart < end - start) {
    end = target.length - targetStart + start;
  }

  var len = end - start;
  var i;

  if (this === target && start < targetStart && targetStart < end) {
    // descending copy from end
    for (i = len - 1; i >= 0; --i) {
      target[i + targetStart] = this[i + start];
    }
  } else if (len < 1000 || !Buffer.TYPED_ARRAY_SUPPORT) {
    // ascending copy from start
    for (i = 0; i < len; ++i) {
      target[i + targetStart] = this[i + start];
    }
  } else {
    Uint8Array.prototype.set.call(
      target,
      this.subarray(start, start + len),
      targetStart
    );
  }

  return len
};

// Usage:
//    buffer.fill(number[, offset[, end]])
//    buffer.fill(buffer[, offset[, end]])
//    buffer.fill(string[, offset[, end]][, encoding])
Buffer.prototype.fill = function fill (val, start, end, encoding) {
  // Handle string cases:
  if (typeof val === 'string') {
    if (typeof start === 'string') {
      encoding = start;
      start = 0;
      end = this.length;
    } else if (typeof end === 'string') {
      encoding = end;
      end = this.length;
    }
    if (val.length === 1) {
      var code = val.charCodeAt(0);
      if (code < 256) {
        val = code;
      }
    }
    if (encoding !== undefined && typeof encoding !== 'string') {
      throw new TypeError('encoding must be a string')
    }
    if (typeof encoding === 'string' && !Buffer.isEncoding(encoding)) {
      throw new TypeError('Unknown encoding: ' + encoding)
    }
  } else if (typeof val === 'number') {
    val = val & 255;
  }

  // Invalid ranges are not set to a default, so can range check early.
  if (start < 0 || this.length < start || this.length < end) {
    throw new RangeError('Out of range index')
  }

  if (end <= start) {
    return this
  }

  start = start >>> 0;
  end = end === undefined ? this.length : end >>> 0;

  if (!val) val = 0;

  var i;
  if (typeof val === 'number') {
    for (i = start; i < end; ++i) {
      this[i] = val;
    }
  } else {
    var bytes = internalIsBuffer(val)
      ? val
      : utf8ToBytes(new Buffer(val, encoding).toString());
    var len = bytes.length;
    for (i = 0; i < end - start; ++i) {
      this[i + start] = bytes[i % len];
    }
  }

  return this
};

// HELPER FUNCTIONS
// ================

var INVALID_BASE64_RE = /[^+\/0-9A-Za-z-_]/g;

function base64clean (str) {
  // Node strips out invalid characters like \n and \t from the string, base64-js does not
  str = stringtrim(str).replace(INVALID_BASE64_RE, '');
  // Node converts strings with length < 2 to ''
  if (str.length < 2) return ''
  // Node allows for non-padded base64 strings (missing trailing ===), base64-js does not
  while (str.length % 4 !== 0) {
    str = str + '=';
  }
  return str
}

function stringtrim (str) {
  if (str.trim) return str.trim()
  return str.replace(/^\s+|\s+$/g, '')
}

function toHex (n) {
  if (n < 16) return '0' + n.toString(16)
  return n.toString(16)
}

function utf8ToBytes (string, units) {
  units = units || Infinity;
  var codePoint;
  var length = string.length;
  var leadSurrogate = null;
  var bytes = [];

  for (var i = 0; i < length; ++i) {
    codePoint = string.charCodeAt(i);

    // is surrogate component
    if (codePoint > 0xD7FF && codePoint < 0xE000) {
      // last char was a lead
      if (!leadSurrogate) {
        // no lead yet
        if (codePoint > 0xDBFF) {
          // unexpected trail
          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD);
          continue
        } else if (i + 1 === length) {
          // unpaired lead
          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD);
          continue
        }

        // valid lead
        leadSurrogate = codePoint;

        continue
      }

      // 2 leads in a row
      if (codePoint < 0xDC00) {
        if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD);
        leadSurrogate = codePoint;
        continue
      }

      // valid surrogate pair
      codePoint = (leadSurrogate - 0xD800 << 10 | codePoint - 0xDC00) + 0x10000;
    } else if (leadSurrogate) {
      // valid bmp char, but last char was a lead
      if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD);
    }

    leadSurrogate = null;

    // encode utf8
    if (codePoint < 0x80) {
      if ((units -= 1) < 0) break
      bytes.push(codePoint);
    } else if (codePoint < 0x800) {
      if ((units -= 2) < 0) break
      bytes.push(
        codePoint >> 0x6 | 0xC0,
        codePoint & 0x3F | 0x80
      );
    } else if (codePoint < 0x10000) {
      if ((units -= 3) < 0) break
      bytes.push(
        codePoint >> 0xC | 0xE0,
        codePoint >> 0x6 & 0x3F | 0x80,
        codePoint & 0x3F | 0x80
      );
    } else if (codePoint < 0x110000) {
      if ((units -= 4) < 0) break
      bytes.push(
        codePoint >> 0x12 | 0xF0,
        codePoint >> 0xC & 0x3F | 0x80,
        codePoint >> 0x6 & 0x3F | 0x80,
        codePoint & 0x3F | 0x80
      );
    } else {
      throw new Error('Invalid code point')
    }
  }

  return bytes
}

function asciiToBytes (str) {
  var byteArray = [];
  for (var i = 0; i < str.length; ++i) {
    // Node's code seems to be doing this and not & 0x7F..
    byteArray.push(str.charCodeAt(i) & 0xFF);
  }
  return byteArray
}

function utf16leToBytes (str, units) {
  var c, hi, lo;
  var byteArray = [];
  for (var i = 0; i < str.length; ++i) {
    if ((units -= 2) < 0) break

    c = str.charCodeAt(i);
    hi = c >> 8;
    lo = c % 256;
    byteArray.push(lo);
    byteArray.push(hi);
  }

  return byteArray
}


function base64ToBytes (str) {
  return toByteArray(base64clean(str))
}

function blitBuffer (src, dst, offset, length) {
  for (var i = 0; i < length; ++i) {
    if ((i + offset >= dst.length) || (i >= src.length)) break
    dst[i + offset] = src[i];
  }
  return i
}

function isnan (val) {
  return val !== val // eslint-disable-line no-self-compare
}


// the following is from is-buffer, also by Feross Aboukhadijeh and with same lisence
// The _isBuffer check is for Safari 5-7 support, because it's missing
// Object.prototype.constructor. Remove this eventually
function isBuffer(obj) {
  return obj != null && (!!obj._isBuffer || isFastBuffer(obj) || isSlowBuffer(obj))
}

function isFastBuffer (obj) {
  return !!obj.constructor && typeof obj.constructor.isBuffer === 'function' && obj.constructor.isBuffer(obj)
}

// For Node v0.10 support. Remove this eventually.
function isSlowBuffer (obj) {
  return typeof obj.readFloatLE === 'function' && typeof obj.slice === 'function' && isFastBuffer(obj.slice(0, 0))
}

var chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';
function encode$2(decoded) {
    var sourceFileIndex = 0; // second field
    var sourceCodeLine = 0; // third field
    var sourceCodeColumn = 0; // fourth field
    var nameIndex = 0; // fifth field
    var mappings = '';
    for (var i = 0; i < decoded.length; i++) {
        var line = decoded[i];
        if (i > 0)
            mappings += ';';
        if (line.length === 0)
            continue;
        var generatedCodeColumn = 0; // first field
        var lineMappings = [];
        for (var _i = 0, line_1 = line; _i < line_1.length; _i++) {
            var segment = line_1[_i];
            var segmentMappings = encodeInteger(segment[0] - generatedCodeColumn);
            generatedCodeColumn = segment[0];
            if (segment.length > 1) {
                segmentMappings +=
                    encodeInteger(segment[1] - sourceFileIndex) +
                        encodeInteger(segment[2] - sourceCodeLine) +
                        encodeInteger(segment[3] - sourceCodeColumn);
                sourceFileIndex = segment[1];
                sourceCodeLine = segment[2];
                sourceCodeColumn = segment[3];
            }
            if (segment.length === 5) {
                segmentMappings += encodeInteger(segment[4] - nameIndex);
                nameIndex = segment[4];
            }
            lineMappings.push(segmentMappings);
        }
        mappings += lineMappings.join(',');
    }
    return mappings;
}
function encodeInteger(num) {
    var result = '';
    num = num < 0 ? (-num << 1) | 1 : num << 1;
    do {
        var clamped = num & 31;
        num >>>= 5;
        if (num > 0) {
            clamped |= 32;
        }
        result += chars[clamped];
    } while (num > 0);
    return result;
}

var BitSet = function BitSet(arg) {
	this.bits = arg instanceof BitSet ? arg.bits.slice() : [];
};

BitSet.prototype.add = function add (n) {
	this.bits[n >> 5] |= 1 << (n & 31);
};

BitSet.prototype.has = function has (n) {
	return !!(this.bits[n >> 5] & (1 << (n & 31)));
};

var Chunk = function Chunk(start, end, content) {
	this.start = start;
	this.end = end;
	this.original = content;

	this.intro = '';
	this.outro = '';

	this.content = content;
	this.storeName = false;
	this.edited = false;

	// we make these non-enumerable, for sanity while debugging
	Object.defineProperties(this, {
		previous: { writable: true, value: null },
		next:     { writable: true, value: null }
	});
};

Chunk.prototype.appendLeft = function appendLeft (content) {
	this.outro += content;
};

Chunk.prototype.appendRight = function appendRight (content) {
	this.intro = this.intro + content;
};

Chunk.prototype.clone = function clone () {
	var chunk = new Chunk(this.start, this.end, this.original);

	chunk.intro = this.intro;
	chunk.outro = this.outro;
	chunk.content = this.content;
	chunk.storeName = this.storeName;
	chunk.edited = this.edited;

	return chunk;
};

Chunk.prototype.contains = function contains (index) {
	return this.start < index && index < this.end;
};

Chunk.prototype.eachNext = function eachNext (fn) {
	var chunk = this;
	while (chunk) {
		fn(chunk);
		chunk = chunk.next;
	}
};

Chunk.prototype.eachPrevious = function eachPrevious (fn) {
	var chunk = this;
	while (chunk) {
		fn(chunk);
		chunk = chunk.previous;
	}
};

Chunk.prototype.edit = function edit (content, storeName, contentOnly) {
	this.content = content;
	if (!contentOnly) {
		this.intro = '';
		this.outro = '';
	}
	this.storeName = storeName;

	this.edited = true;

	return this;
};

Chunk.prototype.prependLeft = function prependLeft (content) {
	this.outro = content + this.outro;
};

Chunk.prototype.prependRight = function prependRight (content) {
	this.intro = content + this.intro;
};

Chunk.prototype.split = function split (index) {
	var sliceIndex = index - this.start;

	var originalBefore = this.original.slice(0, sliceIndex);
	var originalAfter = this.original.slice(sliceIndex);

	this.original = originalBefore;

	var newChunk = new Chunk(index, this.end, originalAfter);
	newChunk.outro = this.outro;
	this.outro = '';

	this.end = index;

	if (this.edited) {
		// TODO is this block necessary?...
		newChunk.edit('', false);
		this.content = '';
	} else {
		this.content = originalBefore;
	}

	newChunk.next = this.next;
	if (newChunk.next) { newChunk.next.previous = newChunk; }
	newChunk.previous = this;
	this.next = newChunk;

	return newChunk;
};

Chunk.prototype.toString = function toString () {
	return this.intro + this.content + this.outro;
};

Chunk.prototype.trimEnd = function trimEnd (rx) {
	this.outro = this.outro.replace(rx, '');
	if (this.outro.length) { return true; }

	var trimmed = this.content.replace(rx, '');

	if (trimmed.length) {
		if (trimmed !== this.content) {
			this.split(this.start + trimmed.length).edit('', undefined, true);
		}
		return true;

	} else {
		this.edit('', undefined, true);

		this.intro = this.intro.replace(rx, '');
		if (this.intro.length) { return true; }
	}
};

Chunk.prototype.trimStart = function trimStart (rx) {
	this.intro = this.intro.replace(rx, '');
	if (this.intro.length) { return true; }

	var trimmed = this.content.replace(rx, '');

	if (trimmed.length) {
		if (trimmed !== this.content) {
			this.split(this.end - trimmed.length);
			this.edit('', undefined, true);
		}
		return true;

	} else {
		this.edit('', undefined, true);

		this.outro = this.outro.replace(rx, '');
		if (this.outro.length) { return true; }
	}
};

var btoa = function () {
	throw new Error('Unsupported environment: `window.btoa` or `Buffer` should be supported.');
};
if (typeof window !== 'undefined' && typeof window.btoa === 'function') {
	btoa = function (str) { return window.btoa(unescape(encodeURIComponent(str))); };
} else if (typeof Buffer === 'function') {
	btoa = function (str) { return Buffer.from(str, 'utf-8').toString('base64'); };
}

var SourceMap = function SourceMap(properties) {
	this.version = 3;
	this.file = properties.file;
	this.sources = properties.sources;
	this.sourcesContent = properties.sourcesContent;
	this.names = properties.names;
	this.mappings = encode$2(properties.mappings);
};

SourceMap.prototype.toString = function toString () {
	return JSON.stringify(this);
};

SourceMap.prototype.toUrl = function toUrl () {
	return 'data:application/json;charset=utf-8;base64,' + btoa(this.toString());
};

function guessIndent(code) {
	var lines = code.split('\n');

	var tabbed = lines.filter(function (line) { return /^\t+/.test(line); });
	var spaced = lines.filter(function (line) { return /^ {2,}/.test(line); });

	if (tabbed.length === 0 && spaced.length === 0) {
		return null;
	}

	// More lines tabbed than spaced? Assume tabs, and
	// default to tabs in the case of a tie (or nothing
	// to go on)
	if (tabbed.length >= spaced.length) {
		return '\t';
	}

	// Otherwise, we need to guess the multiple
	var min = spaced.reduce(function (previous, current) {
		var numSpaces = /^ +/.exec(current)[0].length;
		return Math.min(numSpaces, previous);
	}, Infinity);

	return new Array(min + 1).join(' ');
}

function getRelativePath(from, to) {
	var fromParts = from.split(/[/\\]/);
	var toParts = to.split(/[/\\]/);

	fromParts.pop(); // get dirname

	while (fromParts[0] === toParts[0]) {
		fromParts.shift();
		toParts.shift();
	}

	if (fromParts.length) {
		var i = fromParts.length;
		while (i--) { fromParts[i] = '..'; }
	}

	return fromParts.concat(toParts).join('/');
}

var toString$2 = Object.prototype.toString;

function isObject$1(thing) {
	return toString$2.call(thing) === '[object Object]';
}

function getLocator(source) {
	var originalLines = source.split('\n');
	var lineOffsets = [];

	for (var i = 0, pos = 0; i < originalLines.length; i++) {
		lineOffsets.push(pos);
		pos += originalLines[i].length + 1;
	}

	return function locate(index) {
		var i = 0;
		var j = lineOffsets.length;
		while (i < j) {
			var m = (i + j) >> 1;
			if (index < lineOffsets[m]) {
				j = m;
			} else {
				i = m + 1;
			}
		}
		var line = i - 1;
		var column = index - lineOffsets[line];
		return { line: line, column: column };
	};
}

var Mappings = function Mappings(hires) {
	this.hires = hires;
	this.generatedCodeLine = 0;
	this.generatedCodeColumn = 0;
	this.raw = [];
	this.rawSegments = this.raw[this.generatedCodeLine] = [];
	this.pending = null;
};

Mappings.prototype.addEdit = function addEdit (sourceIndex, content, loc, nameIndex) {
	if (content.length) {
		var segment = [this.generatedCodeColumn, sourceIndex, loc.line, loc.column];
		if (nameIndex >= 0) {
			segment.push(nameIndex);
		}
		this.rawSegments.push(segment);
	} else if (this.pending) {
		this.rawSegments.push(this.pending);
	}

	this.advance(content);
	this.pending = null;
};

Mappings.prototype.addUneditedChunk = function addUneditedChunk (sourceIndex, chunk, original, loc, sourcemapLocations) {
	var originalCharIndex = chunk.start;
	var first = true;

	while (originalCharIndex < chunk.end) {
		if (this.hires || first || sourcemapLocations.has(originalCharIndex)) {
			this.rawSegments.push([this.generatedCodeColumn, sourceIndex, loc.line, loc.column]);
		}

		if (original[originalCharIndex] === '\n') {
			loc.line += 1;
			loc.column = 0;
			this.generatedCodeLine += 1;
			this.raw[this.generatedCodeLine] = this.rawSegments = [];
			this.generatedCodeColumn = 0;
			first = true;
		} else {
			loc.column += 1;
			this.generatedCodeColumn += 1;
			first = false;
		}

		originalCharIndex += 1;
	}

	this.pending = null;
};

Mappings.prototype.advance = function advance (str) {
	if (!str) { return; }

	var lines = str.split('\n');

	if (lines.length > 1) {
		for (var i = 0; i < lines.length - 1; i++) {
			this.generatedCodeLine++;
			this.raw[this.generatedCodeLine] = this.rawSegments = [];
		}
		this.generatedCodeColumn = 0;
	}

	this.generatedCodeColumn += lines[lines.length - 1].length;
};

var n = '\n';

var warned = {
	insertLeft: false,
	insertRight: false,
	storeName: false
};

var MagicString = function MagicString(string, options) {
	if ( options === void 0 ) options = {};

	var chunk = new Chunk(0, string.length, string);

	Object.defineProperties(this, {
		original:              { writable: true, value: string },
		outro:                 { writable: true, value: '' },
		intro:                 { writable: true, value: '' },
		firstChunk:            { writable: true, value: chunk },
		lastChunk:             { writable: true, value: chunk },
		lastSearchedChunk:     { writable: true, value: chunk },
		byStart:               { writable: true, value: {} },
		byEnd:                 { writable: true, value: {} },
		filename:              { writable: true, value: options.filename },
		indentExclusionRanges: { writable: true, value: options.indentExclusionRanges },
		sourcemapLocations:    { writable: true, value: new BitSet() },
		storedNames:           { writable: true, value: {} },
		indentStr:             { writable: true, value: guessIndent(string) }
	});

	this.byStart[0] = chunk;
	this.byEnd[string.length] = chunk;
};

MagicString.prototype.addSourcemapLocation = function addSourcemapLocation (char) {
	this.sourcemapLocations.add(char);
};

MagicString.prototype.append = function append (content) {
	if (typeof content !== 'string') { throw new TypeError('outro content must be a string'); }

	this.outro += content;
	return this;
};

MagicString.prototype.appendLeft = function appendLeft (index, content) {
	if (typeof content !== 'string') { throw new TypeError('inserted content must be a string'); }

	this._split(index);

	var chunk = this.byEnd[index];

	if (chunk) {
		chunk.appendLeft(content);
	} else {
		this.intro += content;
	}
	return this;
};

MagicString.prototype.appendRight = function appendRight (index, content) {
	if (typeof content !== 'string') { throw new TypeError('inserted content must be a string'); }

	this._split(index);

	var chunk = this.byStart[index];

	if (chunk) {
		chunk.appendRight(content);
	} else {
		this.outro += content;
	}
	return this;
};

MagicString.prototype.clone = function clone () {
	var cloned = new MagicString(this.original, { filename: this.filename });

	var originalChunk = this.firstChunk;
	var clonedChunk = (cloned.firstChunk = cloned.lastSearchedChunk = originalChunk.clone());

	while (originalChunk) {
		cloned.byStart[clonedChunk.start] = clonedChunk;
		cloned.byEnd[clonedChunk.end] = clonedChunk;

		var nextOriginalChunk = originalChunk.next;
		var nextClonedChunk = nextOriginalChunk && nextOriginalChunk.clone();

		if (nextClonedChunk) {
			clonedChunk.next = nextClonedChunk;
			nextClonedChunk.previous = clonedChunk;

			clonedChunk = nextClonedChunk;
		}

		originalChunk = nextOriginalChunk;
	}

	cloned.lastChunk = clonedChunk;

	if (this.indentExclusionRanges) {
		cloned.indentExclusionRanges = this.indentExclusionRanges.slice();
	}

	cloned.sourcemapLocations = new BitSet(this.sourcemapLocations);

	cloned.intro = this.intro;
	cloned.outro = this.outro;

	return cloned;
};

MagicString.prototype.generateDecodedMap = function generateDecodedMap (options) {
		var this$1 = this;

	options = options || {};

	var sourceIndex = 0;
	var names = Object.keys(this.storedNames);
	var mappings = new Mappings(options.hires);

	var locate = getLocator(this.original);

	if (this.intro) {
		mappings.advance(this.intro);
	}

	this.firstChunk.eachNext(function (chunk) {
		var loc = locate(chunk.start);

		if (chunk.intro.length) { mappings.advance(chunk.intro); }

		if (chunk.edited) {
			mappings.addEdit(
				sourceIndex,
				chunk.content,
				loc,
				chunk.storeName ? names.indexOf(chunk.original) : -1
			);
		} else {
			mappings.addUneditedChunk(sourceIndex, chunk, this$1.original, loc, this$1.sourcemapLocations);
		}

		if (chunk.outro.length) { mappings.advance(chunk.outro); }
	});

	return {
		file: options.file ? options.file.split(/[/\\]/).pop() : null,
		sources: [options.source ? getRelativePath(options.file || '', options.source) : null],
		sourcesContent: options.includeContent ? [this.original] : [null],
		names: names,
		mappings: mappings.raw
	};
};

MagicString.prototype.generateMap = function generateMap (options) {
	return new SourceMap(this.generateDecodedMap(options));
};

MagicString.prototype.getIndentString = function getIndentString () {
	return this.indentStr === null ? '\t' : this.indentStr;
};

MagicString.prototype.indent = function indent (indentStr, options) {
	var pattern = /^[^\r\n]/gm;

	if (isObject$1(indentStr)) {
		options = indentStr;
		indentStr = undefined;
	}

	indentStr = indentStr !== undefined ? indentStr : this.indentStr || '\t';

	if (indentStr === '') { return this; } // noop

	options = options || {};

	// Process exclusion ranges
	var isExcluded = {};

	if (options.exclude) {
		var exclusions =
			typeof options.exclude[0] === 'number' ? [options.exclude] : options.exclude;
		exclusions.forEach(function (exclusion) {
			for (var i = exclusion[0]; i < exclusion[1]; i += 1) {
				isExcluded[i] = true;
			}
		});
	}

	var shouldIndentNextCharacter = options.indentStart !== false;
	var replacer = function (match) {
		if (shouldIndentNextCharacter) { return ("" + indentStr + match); }
		shouldIndentNextCharacter = true;
		return match;
	};

	this.intro = this.intro.replace(pattern, replacer);

	var charIndex = 0;
	var chunk = this.firstChunk;

	while (chunk) {
		var end = chunk.end;

		if (chunk.edited) {
			if (!isExcluded[charIndex]) {
				chunk.content = chunk.content.replace(pattern, replacer);

				if (chunk.content.length) {
					shouldIndentNextCharacter = chunk.content[chunk.content.length - 1] === '\n';
				}
			}
		} else {
			charIndex = chunk.start;

			while (charIndex < end) {
				if (!isExcluded[charIndex]) {
					var char = this.original[charIndex];

					if (char === '\n') {
						shouldIndentNextCharacter = true;
					} else if (char !== '\r' && shouldIndentNextCharacter) {
						shouldIndentNextCharacter = false;

						if (charIndex === chunk.start) {
							chunk.prependRight(indentStr);
						} else {
							this._splitChunk(chunk, charIndex);
							chunk = chunk.next;
							chunk.prependRight(indentStr);
						}
					}
				}

				charIndex += 1;
			}
		}

		charIndex = chunk.end;
		chunk = chunk.next;
	}

	this.outro = this.outro.replace(pattern, replacer);

	return this;
};

MagicString.prototype.insert = function insert () {
	throw new Error('magicString.insert(...) is deprecated. Use prependRight(...) or appendLeft(...)');
};

MagicString.prototype.insertLeft = function insertLeft (index, content) {
	if (!warned.insertLeft) {
		console.warn('magicString.insertLeft(...) is deprecated. Use magicString.appendLeft(...) instead'); // eslint-disable-line no-console
		warned.insertLeft = true;
	}

	return this.appendLeft(index, content);
};

MagicString.prototype.insertRight = function insertRight (index, content) {
	if (!warned.insertRight) {
		console.warn('magicString.insertRight(...) is deprecated. Use magicString.prependRight(...) instead'); // eslint-disable-line no-console
		warned.insertRight = true;
	}

	return this.prependRight(index, content);
};

MagicString.prototype.move = function move (start, end, index) {
	if (index >= start && index <= end) { throw new Error('Cannot move a selection inside itself'); }

	this._split(start);
	this._split(end);
	this._split(index);

	var first = this.byStart[start];
	var last = this.byEnd[end];

	var oldLeft = first.previous;
	var oldRight = last.next;

	var newRight = this.byStart[index];
	if (!newRight && last === this.lastChunk) { return this; }
	var newLeft = newRight ? newRight.previous : this.lastChunk;

	if (oldLeft) { oldLeft.next = oldRight; }
	if (oldRight) { oldRight.previous = oldLeft; }

	if (newLeft) { newLeft.next = first; }
	if (newRight) { newRight.previous = last; }

	if (!first.previous) { this.firstChunk = last.next; }
	if (!last.next) {
		this.lastChunk = first.previous;
		this.lastChunk.next = null;
	}

	first.previous = newLeft;
	last.next = newRight || null;

	if (!newLeft) { this.firstChunk = first; }
	if (!newRight) { this.lastChunk = last; }
	return this;
};

MagicString.prototype.overwrite = function overwrite (start, end, content, options) {
	if (typeof content !== 'string') { throw new TypeError('replacement content must be a string'); }

	while (start < 0) { start += this.original.length; }
	while (end < 0) { end += this.original.length; }

	if (end > this.original.length) { throw new Error('end is out of bounds'); }
	if (start === end)
		{ throw new Error('Cannot overwrite a zero-length range – use appendLeft or prependRight instead'); }

	this._split(start);
	this._split(end);

	if (options === true) {
		if (!warned.storeName) {
			console.warn('The final argument to magicString.overwrite(...) should be an options object. See https://github.com/rich-harris/magic-string'); // eslint-disable-line no-console
			warned.storeName = true;
		}

		options = { storeName: true };
	}
	var storeName = options !== undefined ? options.storeName : false;
	var contentOnly = options !== undefined ? options.contentOnly : false;

	if (storeName) {
		var original = this.original.slice(start, end);
		this.storedNames[original] = true;
	}

	var first = this.byStart[start];
	var last = this.byEnd[end];

	if (first) {
		if (end > first.end && first.next !== this.byStart[first.end]) {
			throw new Error('Cannot overwrite across a split point');
		}

		first.edit(content, storeName, contentOnly);

		if (first !== last) {
			var chunk = first.next;
			while (chunk !== last) {
				chunk.edit('', false);
				chunk = chunk.next;
			}

			chunk.edit('', false);
		}
	} else {
		// must be inserting at the end
		var newChunk = new Chunk(start, end, '').edit(content, storeName);

		// TODO last chunk in the array may not be the last chunk, if it's moved...
		last.next = newChunk;
		newChunk.previous = last;
	}
	return this;
};

MagicString.prototype.prepend = function prepend (content) {
	if (typeof content !== 'string') { throw new TypeError('outro content must be a string'); }

	this.intro = content + this.intro;
	return this;
};

MagicString.prototype.prependLeft = function prependLeft (index, content) {
	if (typeof content !== 'string') { throw new TypeError('inserted content must be a string'); }

	this._split(index);

	var chunk = this.byEnd[index];

	if (chunk) {
		chunk.prependLeft(content);
	} else {
		this.intro = content + this.intro;
	}
	return this;
};

MagicString.prototype.prependRight = function prependRight (index, content) {
	if (typeof content !== 'string') { throw new TypeError('inserted content must be a string'); }

	this._split(index);

	var chunk = this.byStart[index];

	if (chunk) {
		chunk.prependRight(content);
	} else {
		this.outro = content + this.outro;
	}
	return this;
};

MagicString.prototype.remove = function remove (start, end) {
	while (start < 0) { start += this.original.length; }
	while (end < 0) { end += this.original.length; }

	if (start === end) { return this; }

	if (start < 0 || end > this.original.length) { throw new Error('Character is out of bounds'); }
	if (start > end) { throw new Error('end must be greater than start'); }

	this._split(start);
	this._split(end);

	var chunk = this.byStart[start];

	while (chunk) {
		chunk.intro = '';
		chunk.outro = '';
		chunk.edit('');

		chunk = end > chunk.end ? this.byStart[chunk.end] : null;
	}
	return this;
};

MagicString.prototype.lastChar = function lastChar () {
	if (this.outro.length)
		{ return this.outro[this.outro.length - 1]; }
	var chunk = this.lastChunk;
	do {
		if (chunk.outro.length)
			{ return chunk.outro[chunk.outro.length - 1]; }
		if (chunk.content.length)
			{ return chunk.content[chunk.content.length - 1]; }
		if (chunk.intro.length)
			{ return chunk.intro[chunk.intro.length - 1]; }
	} while (chunk = chunk.previous);
	if (this.intro.length)
		{ return this.intro[this.intro.length - 1]; }
	return '';
};

MagicString.prototype.lastLine = function lastLine () {
	var lineIndex = this.outro.lastIndexOf(n);
	if (lineIndex !== -1)
		{ return this.outro.substr(lineIndex + 1); }
	var lineStr = this.outro;
	var chunk = this.lastChunk;
	do {
		if (chunk.outro.length > 0) {
			lineIndex = chunk.outro.lastIndexOf(n);
			if (lineIndex !== -1)
				{ return chunk.outro.substr(lineIndex + 1) + lineStr; }
			lineStr = chunk.outro + lineStr;
		}

		if (chunk.content.length > 0) {
			lineIndex = chunk.content.lastIndexOf(n);
			if (lineIndex !== -1)
				{ return chunk.content.substr(lineIndex + 1) + lineStr; }
			lineStr = chunk.content + lineStr;
		}

		if (chunk.intro.length > 0) {
			lineIndex = chunk.intro.lastIndexOf(n);
			if (lineIndex !== -1)
				{ return chunk.intro.substr(lineIndex + 1) + lineStr; }
			lineStr = chunk.intro + lineStr;
		}
	} while (chunk = chunk.previous);
	lineIndex = this.intro.lastIndexOf(n);
	if (lineIndex !== -1)
		{ return this.intro.substr(lineIndex + 1) + lineStr; }
	return this.intro + lineStr;
};

MagicString.prototype.slice = function slice (start, end) {
		if ( start === void 0 ) start = 0;
		if ( end === void 0 ) end = this.original.length;

	while (start < 0) { start += this.original.length; }
	while (end < 0) { end += this.original.length; }

	var result = '';

	// find start chunk
	var chunk = this.firstChunk;
	while (chunk && (chunk.start > start || chunk.end <= start)) {
		// found end chunk before start
		if (chunk.start < end && chunk.end >= end) {
			return result;
		}

		chunk = chunk.next;
	}

	if (chunk && chunk.edited && chunk.start !== start)
		{ throw new Error(("Cannot use replaced character " + start + " as slice start anchor.")); }

	var startChunk = chunk;
	while (chunk) {
		if (chunk.intro && (startChunk !== chunk || chunk.start === start)) {
			result += chunk.intro;
		}

		var containsEnd = chunk.start < end && chunk.end >= end;
		if (containsEnd && chunk.edited && chunk.end !== end)
			{ throw new Error(("Cannot use replaced character " + end + " as slice end anchor.")); }

		var sliceStart = startChunk === chunk ? start - chunk.start : 0;
		var sliceEnd = containsEnd ? chunk.content.length + end - chunk.end : chunk.content.length;

		result += chunk.content.slice(sliceStart, sliceEnd);

		if (chunk.outro && (!containsEnd || chunk.end === end)) {
			result += chunk.outro;
		}

		if (containsEnd) {
			break;
		}

		chunk = chunk.next;
	}

	return result;
};

// TODO deprecate this? not really very useful
MagicString.prototype.snip = function snip (start, end) {
	var clone = this.clone();
	clone.remove(0, start);
	clone.remove(end, clone.original.length);

	return clone;
};

MagicString.prototype._split = function _split (index) {
	if (this.byStart[index] || this.byEnd[index]) { return; }

	var chunk = this.lastSearchedChunk;
	var searchForward = index > chunk.end;

	while (chunk) {
		if (chunk.contains(index)) { return this._splitChunk(chunk, index); }

		chunk = searchForward ? this.byStart[chunk.end] : this.byEnd[chunk.start];
	}
};

MagicString.prototype._splitChunk = function _splitChunk (chunk, index) {
	if (chunk.edited && chunk.content.length) {
		// zero-length edited chunks are a special case (overlapping replacements)
		var loc = getLocator(this.original)(index);
		throw new Error(
			("Cannot split a chunk that has already been edited (" + (loc.line) + ":" + (loc.column) + " – \"" + (chunk.original) + "\")")
		);
	}

	var newChunk = chunk.split(index);

	this.byEnd[index] = chunk;
	this.byStart[index] = newChunk;
	this.byEnd[newChunk.end] = newChunk;

	if (chunk === this.lastChunk) { this.lastChunk = newChunk; }

	this.lastSearchedChunk = chunk;
	return true;
};

MagicString.prototype.toString = function toString () {
	var str = this.intro;

	var chunk = this.firstChunk;
	while (chunk) {
		str += chunk.toString();
		chunk = chunk.next;
	}

	return str + this.outro;
};

MagicString.prototype.isEmpty = function isEmpty () {
	var chunk = this.firstChunk;
	do {
		if (chunk.intro.length && chunk.intro.trim() ||
				chunk.content.length && chunk.content.trim() ||
				chunk.outro.length && chunk.outro.trim())
			{ return false; }
	} while (chunk = chunk.next);
	return true;
};

MagicString.prototype.length = function length () {
	var chunk = this.firstChunk;
	var length = 0;
	do {
		length += chunk.intro.length + chunk.content.length + chunk.outro.length;
	} while (chunk = chunk.next);
	return length;
};

MagicString.prototype.trimLines = function trimLines () {
	return this.trim('[\\r\\n]');
};

MagicString.prototype.trim = function trim (charType) {
	return this.trimStart(charType).trimEnd(charType);
};

MagicString.prototype.trimEndAborted = function trimEndAborted (charType) {
	var rx = new RegExp((charType || '\\s') + '+$');

	this.outro = this.outro.replace(rx, '');
	if (this.outro.length) { return true; }

	var chunk = this.lastChunk;

	do {
		var end = chunk.end;
		var aborted = chunk.trimEnd(rx);

		// if chunk was trimmed, we have a new lastChunk
		if (chunk.end !== end) {
			if (this.lastChunk === chunk) {
				this.lastChunk = chunk.next;
			}

			this.byEnd[chunk.end] = chunk;
			this.byStart[chunk.next.start] = chunk.next;
			this.byEnd[chunk.next.end] = chunk.next;
		}

		if (aborted) { return true; }
		chunk = chunk.previous;
	} while (chunk);

	return false;
};

MagicString.prototype.trimEnd = function trimEnd (charType) {
	this.trimEndAborted(charType);
	return this;
};
MagicString.prototype.trimStartAborted = function trimStartAborted (charType) {
	var rx = new RegExp('^' + (charType || '\\s') + '+');

	this.intro = this.intro.replace(rx, '');
	if (this.intro.length) { return true; }

	var chunk = this.firstChunk;

	do {
		var end = chunk.end;
		var aborted = chunk.trimStart(rx);

		if (chunk.end !== end) {
			// special case...
			if (chunk === this.lastChunk) { this.lastChunk = chunk.next; }

			this.byEnd[chunk.end] = chunk;
			this.byStart[chunk.next.start] = chunk.next;
			this.byEnd[chunk.next.end] = chunk.next;
		}

		if (aborted) { return true; }
		chunk = chunk.next;
	} while (chunk);

	return false;
};

MagicString.prototype.trimStart = function trimStart (charType) {
	this.trimStartAborted(charType);
	return this;
};

// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.

// resolves . and .. elements in a path array with directory names there
// must be no slashes, empty elements, or device names (c:\) in the array
// (so also no leading and trailing slashes - it does not distinguish
// relative and absolute paths)
function normalizeArray(parts, allowAboveRoot) {
  // if the path tries to go above the root, `up` ends up > 0
  var up = 0;
  for (var i = parts.length - 1; i >= 0; i--) {
    var last = parts[i];
    if (last === '.') {
      parts.splice(i, 1);
    } else if (last === '..') {
      parts.splice(i, 1);
      up++;
    } else if (up) {
      parts.splice(i, 1);
      up--;
    }
  }

  // if the path is allowed to go above the root, restore leading ..s
  if (allowAboveRoot) {
    for (; up--; up) {
      parts.unshift('..');
    }
  }

  return parts;
}

// Split a filename into [root, dir, basename, ext], unix version
// 'root' is just a slash, or nothing.
var splitPathRe =
    /^(\/?|)([\s\S]*?)((?:\.{1,2}|[^\/]+?|)(\.[^.\/]*|))(?:[\/]*)$/;
var splitPath = function(filename) {
  return splitPathRe.exec(filename).slice(1);
};

// path.resolve([from ...], to)
// posix version
function resolve() {
  var resolvedPath = '',
      resolvedAbsolute = false;

  for (var i = arguments.length - 1; i >= -1 && !resolvedAbsolute; i--) {
    var path = (i >= 0) ? arguments[i] : '/';

    // Skip empty and invalid entries
    if (typeof path !== 'string') {
      throw new TypeError('Arguments to path.resolve must be strings');
    } else if (!path) {
      continue;
    }

    resolvedPath = path + '/' + resolvedPath;
    resolvedAbsolute = path.charAt(0) === '/';
  }

  // At this point the path should be resolved to a full absolute path, but
  // handle relative paths to be safe (might happen when process.cwd() fails)

  // Normalize the path
  resolvedPath = normalizeArray(filter(resolvedPath.split('/'), function(p) {
    return !!p;
  }), !resolvedAbsolute).join('/');

  return ((resolvedAbsolute ? '/' : '') + resolvedPath) || '.';
}
// path.normalize(path)
// posix version
function normalize(path) {
  var isPathAbsolute = isAbsolute(path),
      trailingSlash = substr(path, -1) === '/';

  // Normalize the path
  path = normalizeArray(filter(path.split('/'), function(p) {
    return !!p;
  }), !isPathAbsolute).join('/');

  if (!path && !isPathAbsolute) {
    path = '.';
  }
  if (path && trailingSlash) {
    path += '/';
  }

  return (isPathAbsolute ? '/' : '') + path;
}
// posix version
function isAbsolute(path) {
  return path.charAt(0) === '/';
}

// posix version
function join() {
  var paths = Array.prototype.slice.call(arguments, 0);
  return normalize(filter(paths, function(p, index) {
    if (typeof p !== 'string') {
      throw new TypeError('Arguments to path.join must be strings');
    }
    return p;
  }).join('/'));
}


// path.relative(from, to)
// posix version
function relative(from, to) {
  from = resolve(from).substr(1);
  to = resolve(to).substr(1);

  function trim(arr) {
    var start = 0;
    for (; start < arr.length; start++) {
      if (arr[start] !== '') break;
    }

    var end = arr.length - 1;
    for (; end >= 0; end--) {
      if (arr[end] !== '') break;
    }

    if (start > end) return [];
    return arr.slice(start, end - start + 1);
  }

  var fromParts = trim(from.split('/'));
  var toParts = trim(to.split('/'));

  var length = Math.min(fromParts.length, toParts.length);
  var samePartsLength = length;
  for (var i = 0; i < length; i++) {
    if (fromParts[i] !== toParts[i]) {
      samePartsLength = i;
      break;
    }
  }

  var outputParts = [];
  for (var i = samePartsLength; i < fromParts.length; i++) {
    outputParts.push('..');
  }

  outputParts = outputParts.concat(toParts.slice(samePartsLength));

  return outputParts.join('/');
}

var sep = '/';
var delimiter = ':';

function dirname(path) {
  var result = splitPath(path),
      root = result[0],
      dir = result[1];

  if (!root && !dir) {
    // No dirname whatsoever
    return '.';
  }

  if (dir) {
    // It has a dirname, strip trailing slash
    dir = dir.substr(0, dir.length - 1);
  }

  return root + dir;
}

function basename(path, ext) {
  var f = splitPath(path)[2];
  // TODO: make this comparison case-insensitive on windows?
  if (ext && f.substr(-1 * ext.length) === ext) {
    f = f.substr(0, f.length - ext.length);
  }
  return f;
}


function extname(path) {
  return splitPath(path)[3];
}
var path = {
  extname: extname,
  basename: basename,
  dirname: dirname,
  sep: sep,
  delimiter: delimiter,
  relative: relative,
  join: join,
  isAbsolute: isAbsolute,
  normalize: normalize,
  resolve: resolve
};
function filter (xs, f) {
    if (xs.filter) return xs.filter(f);
    var res = [];
    for (var i = 0; i < xs.length; i++) {
        if (f(xs[i], i, xs)) res.push(xs[i]);
    }
    return res;
}

// String.prototype.substr - negative index don't work in IE8
var substr = 'ab'.substr(-1) === 'b' ?
    function (str, start, len) { return str.substr(start, len) } :
    function (str, start, len) {
        if (start < 0) start = str.length + start;
        return str.substr(start, len);
    }
;

var _polyfillNode_path = /*#__PURE__*/Object.freeze({
  __proto__: null,
  resolve: resolve,
  normalize: normalize,
  isAbsolute: isAbsolute,
  join: join,
  relative: relative,
  sep: sep,
  delimiter: delimiter,
  dirname: dirname,
  basename: basename,
  extname: extname,
  'default': path
});

/*! https://mths.be/punycode v1.4.1 by @mathias */


/** Highest positive signed 32-bit float value */
var maxInt = 2147483647; // aka. 0x7FFFFFFF or 2^31-1

/** Bootstring parameters */
var base = 36;
var tMin = 1;
var tMax = 26;
var skew = 38;
var damp = 700;
var initialBias = 72;
var initialN = 128; // 0x80
var delimiter$1 = '-'; // '\x2D'
var regexNonASCII = /[^\x20-\x7E]/; // unprintable ASCII chars + non-ASCII chars
var regexSeparators = /[\x2E\u3002\uFF0E\uFF61]/g; // RFC 3490 separators

/** Error messages */
var errors = {
  'overflow': 'Overflow: input needs wider integers to process',
  'not-basic': 'Illegal input >= 0x80 (not a basic code point)',
  'invalid-input': 'Invalid input'
};

/** Convenience shortcuts */
var baseMinusTMin = base - tMin;
var floor = Math.floor;
var stringFromCharCode = String.fromCharCode;

/*--------------------------------------------------------------------------*/

/**
 * A generic error utility function.
 * @private
 * @param {String} type The error type.
 * @returns {Error} Throws a `RangeError` with the applicable error message.
 */
function error(type) {
  throw new RangeError(errors[type]);
}

/**
 * A generic `Array#map` utility function.
 * @private
 * @param {Array} array The array to iterate over.
 * @param {Function} callback The function that gets called for every array
 * item.
 * @returns {Array} A new array of values returned by the callback function.
 */
function map(array, fn) {
  var length = array.length;
  var result = [];
  while (length--) {
    result[length] = fn(array[length]);
  }
  return result;
}

/**
 * A simple `Array#map`-like wrapper to work with domain name strings or email
 * addresses.
 * @private
 * @param {String} domain The domain name or email address.
 * @param {Function} callback The function that gets called for every
 * character.
 * @returns {Array} A new string of characters returned by the callback
 * function.
 */
function mapDomain(string, fn) {
  var parts = string.split('@');
  var result = '';
  if (parts.length > 1) {
    // In email addresses, only the domain name should be punycoded. Leave
    // the local part (i.e. everything up to `@`) intact.
    result = parts[0] + '@';
    string = parts[1];
  }
  // Avoid `split(regex)` for IE8 compatibility. See #17.
  string = string.replace(regexSeparators, '\x2E');
  var labels = string.split('.');
  var encoded = map(labels, fn).join('.');
  return result + encoded;
}

/**
 * Creates an array containing the numeric code points of each Unicode
 * character in the string. While JavaScript uses UCS-2 internally,
 * this function will convert a pair of surrogate halves (each of which
 * UCS-2 exposes as separate characters) into a single code point,
 * matching UTF-16.
 * @see `punycode.ucs2.encode`
 * @see <https://mathiasbynens.be/notes/javascript-encoding>
 * @memberOf punycode.ucs2
 * @name decode
 * @param {String} string The Unicode input string (UCS-2).
 * @returns {Array} The new array of code points.
 */
function ucs2decode(string) {
  var output = [],
    counter = 0,
    length = string.length,
    value,
    extra;
  while (counter < length) {
    value = string.charCodeAt(counter++);
    if (value >= 0xD800 && value <= 0xDBFF && counter < length) {
      // high surrogate, and there is a next character
      extra = string.charCodeAt(counter++);
      if ((extra & 0xFC00) == 0xDC00) { // low surrogate
        output.push(((value & 0x3FF) << 10) + (extra & 0x3FF) + 0x10000);
      } else {
        // unmatched surrogate; only append this code unit, in case the next
        // code unit is the high surrogate of a surrogate pair
        output.push(value);
        counter--;
      }
    } else {
      output.push(value);
    }
  }
  return output;
}

/**
 * Converts a digit/integer into a basic code point.
 * @see `basicToDigit()`
 * @private
 * @param {Number} digit The numeric value of a basic code point.
 * @returns {Number} The basic code point whose value (when used for
 * representing integers) is `digit`, which needs to be in the range
 * `0` to `base - 1`. If `flag` is non-zero, the uppercase form is
 * used; else, the lowercase form is used. The behavior is undefined
 * if `flag` is non-zero and `digit` has no uppercase form.
 */
function digitToBasic(digit, flag) {
  //  0..25 map to ASCII a..z or A..Z
  // 26..35 map to ASCII 0..9
  return digit + 22 + 75 * (digit < 26) - ((flag != 0) << 5);
}

/**
 * Bias adaptation function as per section 3.4 of RFC 3492.
 * https://tools.ietf.org/html/rfc3492#section-3.4
 * @private
 */
function adapt(delta, numPoints, firstTime) {
  var k = 0;
  delta = firstTime ? floor(delta / damp) : delta >> 1;
  delta += floor(delta / numPoints);
  for ( /* no initialization */ ; delta > baseMinusTMin * tMax >> 1; k += base) {
    delta = floor(delta / baseMinusTMin);
  }
  return floor(k + (baseMinusTMin + 1) * delta / (delta + skew));
}

/**
 * Converts a string of Unicode symbols (e.g. a domain name label) to a
 * Punycode string of ASCII-only symbols.
 * @memberOf punycode
 * @param {String} input The string of Unicode symbols.
 * @returns {String} The resulting Punycode string of ASCII-only symbols.
 */
function encode$3(input) {
  var n,
    delta,
    handledCPCount,
    basicLength,
    bias,
    j,
    m,
    q,
    k,
    t,
    currentValue,
    output = [],
    /** `inputLength` will hold the number of code points in `input`. */
    inputLength,
    /** Cached calculation results */
    handledCPCountPlusOne,
    baseMinusT,
    qMinusT;

  // Convert the input in UCS-2 to Unicode
  input = ucs2decode(input);

  // Cache the length
  inputLength = input.length;

  // Initialize the state
  n = initialN;
  delta = 0;
  bias = initialBias;

  // Handle the basic code points
  for (j = 0; j < inputLength; ++j) {
    currentValue = input[j];
    if (currentValue < 0x80) {
      output.push(stringFromCharCode(currentValue));
    }
  }

  handledCPCount = basicLength = output.length;

  // `handledCPCount` is the number of code points that have been handled;
  // `basicLength` is the number of basic code points.

  // Finish the basic string - if it is not empty - with a delimiter
  if (basicLength) {
    output.push(delimiter$1);
  }

  // Main encoding loop:
  while (handledCPCount < inputLength) {

    // All non-basic code points < n have been handled already. Find the next
    // larger one:
    for (m = maxInt, j = 0; j < inputLength; ++j) {
      currentValue = input[j];
      if (currentValue >= n && currentValue < m) {
        m = currentValue;
      }
    }

    // Increase `delta` enough to advance the decoder's <n,i> state to <m,0>,
    // but guard against overflow
    handledCPCountPlusOne = handledCPCount + 1;
    if (m - n > floor((maxInt - delta) / handledCPCountPlusOne)) {
      error('overflow');
    }

    delta += (m - n) * handledCPCountPlusOne;
    n = m;

    for (j = 0; j < inputLength; ++j) {
      currentValue = input[j];

      if (currentValue < n && ++delta > maxInt) {
        error('overflow');
      }

      if (currentValue == n) {
        // Represent delta as a generalized variable-length integer
        for (q = delta, k = base; /* no condition */ ; k += base) {
          t = k <= bias ? tMin : (k >= bias + tMax ? tMax : k - bias);
          if (q < t) {
            break;
          }
          qMinusT = q - t;
          baseMinusT = base - t;
          output.push(
            stringFromCharCode(digitToBasic(t + qMinusT % baseMinusT, 0))
          );
          q = floor(qMinusT / baseMinusT);
        }

        output.push(stringFromCharCode(digitToBasic(q, 0)));
        bias = adapt(delta, handledCPCountPlusOne, handledCPCount == basicLength);
        delta = 0;
        ++handledCPCount;
      }
    }

    ++delta;
    ++n;

  }
  return output.join('');
}

/**
 * Converts a Unicode string representing a domain name or an email address to
 * Punycode. Only the non-ASCII parts of the domain name will be converted,
 * i.e. it doesn't matter if you call it with a domain that's already in
 * ASCII.
 * @memberOf punycode
 * @param {String} input The domain name or email address to convert, as a
 * Unicode string.
 * @returns {String} The Punycode representation of the given domain name or
 * email address.
 */
function toASCII(input) {
  return mapDomain(input, function(string) {
    return regexNonASCII.test(string) ?
      'xn--' + encode$3(string) :
      string;
  });
}

// shim for using process in browser
// based off https://github.com/defunctzombie/node-process/blob/master/browser.js

function defaultSetTimout() {
    throw new Error('setTimeout has not been defined');
}
function defaultClearTimeout () {
    throw new Error('clearTimeout has not been defined');
}
var cachedSetTimeout = defaultSetTimout;
var cachedClearTimeout = defaultClearTimeout;
if (typeof global.setTimeout === 'function') {
    cachedSetTimeout = setTimeout;
}
if (typeof global.clearTimeout === 'function') {
    cachedClearTimeout = clearTimeout;
}

function runTimeout(fun) {
    if (cachedSetTimeout === setTimeout) {
        //normal enviroments in sane situations
        return setTimeout(fun, 0);
    }
    // if setTimeout wasn't available but was latter defined
    if ((cachedSetTimeout === defaultSetTimout || !cachedSetTimeout) && setTimeout) {
        cachedSetTimeout = setTimeout;
        return setTimeout(fun, 0);
    }
    try {
        // when when somebody has screwed with setTimeout but no I.E. maddness
        return cachedSetTimeout(fun, 0);
    } catch(e){
        try {
            // When we are in I.E. but the script has been evaled so I.E. doesn't trust the global object when called normally
            return cachedSetTimeout.call(null, fun, 0);
        } catch(e){
            // same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error
            return cachedSetTimeout.call(this, fun, 0);
        }
    }


}
function runClearTimeout(marker) {
    if (cachedClearTimeout === clearTimeout) {
        //normal enviroments in sane situations
        return clearTimeout(marker);
    }
    // if clearTimeout wasn't available but was latter defined
    if ((cachedClearTimeout === defaultClearTimeout || !cachedClearTimeout) && clearTimeout) {
        cachedClearTimeout = clearTimeout;
        return clearTimeout(marker);
    }
    try {
        // when when somebody has screwed with setTimeout but no I.E. maddness
        return cachedClearTimeout(marker);
    } catch (e){
        try {
            // When we are in I.E. but the script has been evaled so I.E. doesn't  trust the global object when called normally
            return cachedClearTimeout.call(null, marker);
        } catch (e){
            // same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error.
            // Some versions of I.E. have different rules for clearTimeout vs setTimeout
            return cachedClearTimeout.call(this, marker);
        }
    }



}
var queue = [];
var draining = false;
var currentQueue;
var queueIndex = -1;

function cleanUpNextTick() {
    if (!draining || !currentQueue) {
        return;
    }
    draining = false;
    if (currentQueue.length) {
        queue = currentQueue.concat(queue);
    } else {
        queueIndex = -1;
    }
    if (queue.length) {
        drainQueue();
    }
}

function drainQueue() {
    if (draining) {
        return;
    }
    var timeout = runTimeout(cleanUpNextTick);
    draining = true;

    var len = queue.length;
    while(len) {
        currentQueue = queue;
        queue = [];
        while (++queueIndex < len) {
            if (currentQueue) {
                currentQueue[queueIndex].run();
            }
        }
        queueIndex = -1;
        len = queue.length;
    }
    currentQueue = null;
    draining = false;
    runClearTimeout(timeout);
}
function nextTick(fun) {
    var args = new Array(arguments.length - 1);
    if (arguments.length > 1) {
        for (var i = 1; i < arguments.length; i++) {
            args[i - 1] = arguments[i];
        }
    }
    queue.push(new Item(fun, args));
    if (queue.length === 1 && !draining) {
        runTimeout(drainQueue);
    }
}
// v8 likes predictible objects
function Item(fun, array) {
    this.fun = fun;
    this.array = array;
}
Item.prototype.run = function () {
    this.fun.apply(null, this.array);
};
var title = 'browser';
var platform = 'browser';
var browser = true;
var env = {};
var argv = [];
var version = ''; // empty string to avoid regexp issues
var versions = {};
var release = {};
var config = {};

function noop() {}

var on = noop;
var addListener = noop;
var once = noop;
var off = noop;
var removeListener = noop;
var removeAllListeners = noop;
var emit = noop;

function binding(name) {
    throw new Error('process.binding is not supported');
}

function cwd () { return '/' }
function chdir (dir) {
    throw new Error('process.chdir is not supported');
}function umask() { return 0; }

// from https://github.com/kumavis/browser-process-hrtime/blob/master/index.js
var performance = global.performance || {};
var performanceNow =
  performance.now        ||
  performance.mozNow     ||
  performance.msNow      ||
  performance.oNow       ||
  performance.webkitNow  ||
  function(){ return (new Date()).getTime() };

// generate timestamp or delta
// see http://nodejs.org/api/process.html#process_process_hrtime
function hrtime(previousTimestamp){
  var clocktime = performanceNow.call(performance)*1e-3;
  var seconds = Math.floor(clocktime);
  var nanoseconds = Math.floor((clocktime%1)*1e9);
  if (previousTimestamp) {
    seconds = seconds - previousTimestamp[0];
    nanoseconds = nanoseconds - previousTimestamp[1];
    if (nanoseconds<0) {
      seconds--;
      nanoseconds += 1e9;
    }
  }
  return [seconds,nanoseconds]
}

var startTime = new Date();
function uptime() {
  var currentTime = new Date();
  var dif = currentTime - startTime;
  return dif / 1000;
}

var browser$1 = {
  nextTick: nextTick,
  title: title,
  browser: browser,
  env: env,
  argv: argv,
  version: version,
  versions: versions,
  on: on,
  addListener: addListener,
  once: once,
  off: off,
  removeListener: removeListener,
  removeAllListeners: removeAllListeners,
  emit: emit,
  binding: binding,
  cwd: cwd,
  chdir: chdir,
  umask: umask,
  hrtime: hrtime,
  platform: platform,
  release: release,
  config: config,
  uptime: uptime
};

var inherits;
if (typeof Object.create === 'function'){
  inherits = function inherits(ctor, superCtor) {
    // implementation from standard node.js 'util' module
    ctor.super_ = superCtor;
    ctor.prototype = Object.create(superCtor.prototype, {
      constructor: {
        value: ctor,
        enumerable: false,
        writable: true,
        configurable: true
      }
    });
  };
} else {
  inherits = function inherits(ctor, superCtor) {
    ctor.super_ = superCtor;
    var TempCtor = function () {};
    TempCtor.prototype = superCtor.prototype;
    ctor.prototype = new TempCtor();
    ctor.prototype.constructor = ctor;
  };
}
var inherits$1 = inherits;

var formatRegExp = /%[sdj%]/g;
function format(f) {
  if (!isString$1(f)) {
    var objects = [];
    for (var i = 0; i < arguments.length; i++) {
      objects.push(inspect(arguments[i]));
    }
    return objects.join(' ');
  }

  var i = 1;
  var args = arguments;
  var len = args.length;
  var str = String(f).replace(formatRegExp, function(x) {
    if (x === '%%') return '%';
    if (i >= len) return x;
    switch (x) {
      case '%s': return String(args[i++]);
      case '%d': return Number(args[i++]);
      case '%j':
        try {
          return JSON.stringify(args[i++]);
        } catch (_) {
          return '[Circular]';
        }
      default:
        return x;
    }
  });
  for (var x = args[i]; i < len; x = args[++i]) {
    if (isNull(x) || !isObject$2(x)) {
      str += ' ' + x;
    } else {
      str += ' ' + inspect(x);
    }
  }
  return str;
}

// Mark that a method should not be used.
// Returns a modified function which warns once by default.
// If --no-deprecation is set, then it is a no-op.
function deprecate(fn, msg) {
  // Allow for deprecating things in the process of starting up.
  if (isUndefined(global.process)) {
    return function() {
      return deprecate(fn, msg).apply(this, arguments);
    };
  }

  if (browser$1.noDeprecation === true) {
    return fn;
  }

  var warned = false;
  function deprecated() {
    if (!warned) {
      if (browser$1.throwDeprecation) {
        throw new Error(msg);
      } else if (browser$1.traceDeprecation) {
        console.trace(msg);
      } else {
        console.error(msg);
      }
      warned = true;
    }
    return fn.apply(this, arguments);
  }

  return deprecated;
}

var debugs = {};
var debugEnviron;
function debuglog(set) {
  if (isUndefined(debugEnviron))
    debugEnviron = browser$1.env.NODE_DEBUG || '';
  set = set.toUpperCase();
  if (!debugs[set]) {
    if (new RegExp('\\b' + set + '\\b', 'i').test(debugEnviron)) {
      var pid = 0;
      debugs[set] = function() {
        var msg = format.apply(null, arguments);
        console.error('%s %d: %s', set, pid, msg);
      };
    } else {
      debugs[set] = function() {};
    }
  }
  return debugs[set];
}

/**
 * Echos the value of a value. Trys to print the value out
 * in the best way possible given the different types.
 *
 * @param {Object} obj The object to print out.
 * @param {Object} opts Optional options object that alters the output.
 */
/* legacy: obj, showHidden, depth, colors*/
function inspect(obj, opts) {
  // default options
  var ctx = {
    seen: [],
    stylize: stylizeNoColor
  };
  // legacy...
  if (arguments.length >= 3) ctx.depth = arguments[2];
  if (arguments.length >= 4) ctx.colors = arguments[3];
  if (isBoolean(opts)) {
    // legacy...
    ctx.showHidden = opts;
  } else if (opts) {
    // got an "options" object
    _extend(ctx, opts);
  }
  // set default options
  if (isUndefined(ctx.showHidden)) ctx.showHidden = false;
  if (isUndefined(ctx.depth)) ctx.depth = 2;
  if (isUndefined(ctx.colors)) ctx.colors = false;
  if (isUndefined(ctx.customInspect)) ctx.customInspect = true;
  if (ctx.colors) ctx.stylize = stylizeWithColor;
  return formatValue(ctx, obj, ctx.depth);
}

// http://en.wikipedia.org/wiki/ANSI_escape_code#graphics
inspect.colors = {
  'bold' : [1, 22],
  'italic' : [3, 23],
  'underline' : [4, 24],
  'inverse' : [7, 27],
  'white' : [37, 39],
  'grey' : [90, 39],
  'black' : [30, 39],
  'blue' : [34, 39],
  'cyan' : [36, 39],
  'green' : [32, 39],
  'magenta' : [35, 39],
  'red' : [31, 39],
  'yellow' : [33, 39]
};

// Don't use 'blue' not visible on cmd.exe
inspect.styles = {
  'special': 'cyan',
  'number': 'yellow',
  'boolean': 'yellow',
  'undefined': 'grey',
  'null': 'bold',
  'string': 'green',
  'date': 'magenta',
  // "name": intentionally not styling
  'regexp': 'red'
};


function stylizeWithColor(str, styleType) {
  var style = inspect.styles[styleType];

  if (style) {
    return '\u001b[' + inspect.colors[style][0] + 'm' + str +
           '\u001b[' + inspect.colors[style][1] + 'm';
  } else {
    return str;
  }
}


function stylizeNoColor(str, styleType) {
  return str;
}


function arrayToHash(array) {
  var hash = {};

  array.forEach(function(val, idx) {
    hash[val] = true;
  });

  return hash;
}


function formatValue(ctx, value, recurseTimes) {
  // Provide a hook for user-specified inspect functions.
  // Check that value is an object with an inspect function on it
  if (ctx.customInspect &&
      value &&
      isFunction$1(value.inspect) &&
      // Filter out the util module, it's inspect function is special
      value.inspect !== inspect &&
      // Also filter out any prototype objects using the circular check.
      !(value.constructor && value.constructor.prototype === value)) {
    var ret = value.inspect(recurseTimes, ctx);
    if (!isString$1(ret)) {
      ret = formatValue(ctx, ret, recurseTimes);
    }
    return ret;
  }

  // Primitive types cannot have properties
  var primitive = formatPrimitive(ctx, value);
  if (primitive) {
    return primitive;
  }

  // Look up the keys of the object.
  var keys = Object.keys(value);
  var visibleKeys = arrayToHash(keys);

  if (ctx.showHidden) {
    keys = Object.getOwnPropertyNames(value);
  }

  // IE doesn't make error fields non-enumerable
  // http://msdn.microsoft.com/en-us/library/ie/dww52sbt(v=vs.94).aspx
  if (isError(value)
      && (keys.indexOf('message') >= 0 || keys.indexOf('description') >= 0)) {
    return formatError(value);
  }

  // Some type of object without properties can be shortcutted.
  if (keys.length === 0) {
    if (isFunction$1(value)) {
      var name = value.name ? ': ' + value.name : '';
      return ctx.stylize('[Function' + name + ']', 'special');
    }
    if (isRegExp(value)) {
      return ctx.stylize(RegExp.prototype.toString.call(value), 'regexp');
    }
    if (isDate(value)) {
      return ctx.stylize(Date.prototype.toString.call(value), 'date');
    }
    if (isError(value)) {
      return formatError(value);
    }
  }

  var base = '', array = false, braces = ['{', '}'];

  // Make Array say that they are Array
  if (isArray$2(value)) {
    array = true;
    braces = ['[', ']'];
  }

  // Make functions say that they are functions
  if (isFunction$1(value)) {
    var n = value.name ? ': ' + value.name : '';
    base = ' [Function' + n + ']';
  }

  // Make RegExps say that they are RegExps
  if (isRegExp(value)) {
    base = ' ' + RegExp.prototype.toString.call(value);
  }

  // Make dates with properties first say the date
  if (isDate(value)) {
    base = ' ' + Date.prototype.toUTCString.call(value);
  }

  // Make error with message first say the error
  if (isError(value)) {
    base = ' ' + formatError(value);
  }

  if (keys.length === 0 && (!array || value.length == 0)) {
    return braces[0] + base + braces[1];
  }

  if (recurseTimes < 0) {
    if (isRegExp(value)) {
      return ctx.stylize(RegExp.prototype.toString.call(value), 'regexp');
    } else {
      return ctx.stylize('[Object]', 'special');
    }
  }

  ctx.seen.push(value);

  var output;
  if (array) {
    output = formatArray(ctx, value, recurseTimes, visibleKeys, keys);
  } else {
    output = keys.map(function(key) {
      return formatProperty(ctx, value, recurseTimes, visibleKeys, key, array);
    });
  }

  ctx.seen.pop();

  return reduceToSingleString(output, base, braces);
}


function formatPrimitive(ctx, value) {
  if (isUndefined(value))
    return ctx.stylize('undefined', 'undefined');
  if (isString$1(value)) {
    var simple = '\'' + JSON.stringify(value).replace(/^"|"$/g, '')
                                             .replace(/'/g, "\\'")
                                             .replace(/\\"/g, '"') + '\'';
    return ctx.stylize(simple, 'string');
  }
  if (isNumber(value))
    return ctx.stylize('' + value, 'number');
  if (isBoolean(value))
    return ctx.stylize('' + value, 'boolean');
  // For some reason typeof null is "object", so special case here.
  if (isNull(value))
    return ctx.stylize('null', 'null');
}


function formatError(value) {
  return '[' + Error.prototype.toString.call(value) + ']';
}


function formatArray(ctx, value, recurseTimes, visibleKeys, keys) {
  var output = [];
  for (var i = 0, l = value.length; i < l; ++i) {
    if (hasOwnProperty$1(value, String(i))) {
      output.push(formatProperty(ctx, value, recurseTimes, visibleKeys,
          String(i), true));
    } else {
      output.push('');
    }
  }
  keys.forEach(function(key) {
    if (!key.match(/^\d+$/)) {
      output.push(formatProperty(ctx, value, recurseTimes, visibleKeys,
          key, true));
    }
  });
  return output;
}


function formatProperty(ctx, value, recurseTimes, visibleKeys, key, array) {
  var name, str, desc;
  desc = Object.getOwnPropertyDescriptor(value, key) || { value: value[key] };
  if (desc.get) {
    if (desc.set) {
      str = ctx.stylize('[Getter/Setter]', 'special');
    } else {
      str = ctx.stylize('[Getter]', 'special');
    }
  } else {
    if (desc.set) {
      str = ctx.stylize('[Setter]', 'special');
    }
  }
  if (!hasOwnProperty$1(visibleKeys, key)) {
    name = '[' + key + ']';
  }
  if (!str) {
    if (ctx.seen.indexOf(desc.value) < 0) {
      if (isNull(recurseTimes)) {
        str = formatValue(ctx, desc.value, null);
      } else {
        str = formatValue(ctx, desc.value, recurseTimes - 1);
      }
      if (str.indexOf('\n') > -1) {
        if (array) {
          str = str.split('\n').map(function(line) {
            return '  ' + line;
          }).join('\n').substr(2);
        } else {
          str = '\n' + str.split('\n').map(function(line) {
            return '   ' + line;
          }).join('\n');
        }
      }
    } else {
      str = ctx.stylize('[Circular]', 'special');
    }
  }
  if (isUndefined(name)) {
    if (array && key.match(/^\d+$/)) {
      return str;
    }
    name = JSON.stringify('' + key);
    if (name.match(/^"([a-zA-Z_][a-zA-Z_0-9]*)"$/)) {
      name = name.substr(1, name.length - 2);
      name = ctx.stylize(name, 'name');
    } else {
      name = name.replace(/'/g, "\\'")
                 .replace(/\\"/g, '"')
                 .replace(/(^"|"$)/g, "'");
      name = ctx.stylize(name, 'string');
    }
  }

  return name + ': ' + str;
}


function reduceToSingleString(output, base, braces) {
  var length = output.reduce(function(prev, cur) {
    if (cur.indexOf('\n') >= 0) ;
    return prev + cur.replace(/\u001b\[\d\d?m/g, '').length + 1;
  }, 0);

  if (length > 60) {
    return braces[0] +
           (base === '' ? '' : base + '\n ') +
           ' ' +
           output.join(',\n  ') +
           ' ' +
           braces[1];
  }

  return braces[0] + base + ' ' + output.join(', ') + ' ' + braces[1];
}


// NOTE: These type checking functions intentionally don't use `instanceof`
// because it is fragile and can be easily faked with `Object.create()`.
function isArray$2(ar) {
  return Array.isArray(ar);
}

function isBoolean(arg) {
  return typeof arg === 'boolean';
}

function isNull(arg) {
  return arg === null;
}

function isNullOrUndefined(arg) {
  return arg == null;
}

function isNumber(arg) {
  return typeof arg === 'number';
}

function isString$1(arg) {
  return typeof arg === 'string';
}

function isSymbol$1(arg) {
  return typeof arg === 'symbol';
}

function isUndefined(arg) {
  return arg === void 0;
}

function isRegExp(re) {
  return isObject$2(re) && objectToString$1(re) === '[object RegExp]';
}

function isObject$2(arg) {
  return typeof arg === 'object' && arg !== null;
}

function isDate(d) {
  return isObject$2(d) && objectToString$1(d) === '[object Date]';
}

function isError(e) {
  return isObject$2(e) &&
      (objectToString$1(e) === '[object Error]' || e instanceof Error);
}

function isFunction$1(arg) {
  return typeof arg === 'function';
}

function isPrimitive(arg) {
  return arg === null ||
         typeof arg === 'boolean' ||
         typeof arg === 'number' ||
         typeof arg === 'string' ||
         typeof arg === 'symbol' ||  // ES6 symbol
         typeof arg === 'undefined';
}

function isBuffer$1(maybeBuf) {
  return Buffer.isBuffer(maybeBuf);
}

function objectToString$1(o) {
  return Object.prototype.toString.call(o);
}


function pad$1(n) {
  return n < 10 ? '0' + n.toString(10) : n.toString(10);
}


var months = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep',
              'Oct', 'Nov', 'Dec'];

// 26 Feb 16:19:34
function timestamp() {
  var d = new Date();
  var time = [pad$1(d.getHours()),
              pad$1(d.getMinutes()),
              pad$1(d.getSeconds())].join(':');
  return [d.getDate(), months[d.getMonth()], time].join(' ');
}


// log is just a thin wrapper to console.log that prepends a timestamp
function log() {
  console.log('%s - %s', timestamp(), format.apply(null, arguments));
}

function _extend(origin, add) {
  // Don't do anything if add isn't an object
  if (!add || !isObject$2(add)) return origin;

  var keys = Object.keys(add);
  var i = keys.length;
  while (i--) {
    origin[keys[i]] = add[keys[i]];
  }
  return origin;
}
function hasOwnProperty$1(obj, prop) {
  return Object.prototype.hasOwnProperty.call(obj, prop);
}

var _polyfillNode_util = {
  inherits: inherits$1,
  _extend: _extend,
  log: log,
  isBuffer: isBuffer$1,
  isPrimitive: isPrimitive,
  isFunction: isFunction$1,
  isError: isError,
  isDate: isDate,
  isObject: isObject$2,
  isRegExp: isRegExp,
  isUndefined: isUndefined,
  isSymbol: isSymbol$1,
  isString: isString$1,
  isNumber: isNumber,
  isNullOrUndefined: isNullOrUndefined,
  isNull: isNull,
  isBoolean: isBoolean,
  isArray: isArray$2,
  inspect: inspect,
  deprecate: deprecate,
  format: format,
  debuglog: debuglog
};

var _polyfillNode_util$1 = /*#__PURE__*/Object.freeze({
  __proto__: null,
  format: format,
  deprecate: deprecate,
  debuglog: debuglog,
  inspect: inspect,
  isArray: isArray$2,
  isBoolean: isBoolean,
  isNull: isNull,
  isNullOrUndefined: isNullOrUndefined,
  isNumber: isNumber,
  isString: isString$1,
  isSymbol: isSymbol$1,
  isUndefined: isUndefined,
  isRegExp: isRegExp,
  isObject: isObject$2,
  isDate: isDate,
  isError: isError,
  isFunction: isFunction$1,
  isPrimitive: isPrimitive,
  isBuffer: isBuffer$1,
  log: log,
  inherits: inherits$1,
  _extend: _extend,
  'default': _polyfillNode_util
});

// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.


// If obj.hasOwnProperty has been overridden, then calling
// obj.hasOwnProperty(prop) will break.
// See: https://github.com/joyent/node/issues/1707
function hasOwnProperty$2(obj, prop) {
  return Object.prototype.hasOwnProperty.call(obj, prop);
}
var isArray$3 = Array.isArray || function (xs) {
  return Object.prototype.toString.call(xs) === '[object Array]';
};
function stringifyPrimitive(v) {
  switch (typeof v) {
    case 'string':
      return v;

    case 'boolean':
      return v ? 'true' : 'false';

    case 'number':
      return isFinite(v) ? v : '';

    default:
      return '';
  }
}

function stringify (obj, sep, eq, name) {
  sep = sep || '&';
  eq = eq || '=';
  if (obj === null) {
    obj = undefined;
  }

  if (typeof obj === 'object') {
    return map$1(objectKeys(obj), function(k) {
      var ks = encodeURIComponent(stringifyPrimitive(k)) + eq;
      if (isArray$3(obj[k])) {
        return map$1(obj[k], function(v) {
          return ks + encodeURIComponent(stringifyPrimitive(v));
        }).join(sep);
      } else {
        return ks + encodeURIComponent(stringifyPrimitive(obj[k]));
      }
    }).join(sep);

  }

  if (!name) return '';
  return encodeURIComponent(stringifyPrimitive(name)) + eq +
         encodeURIComponent(stringifyPrimitive(obj));
}
function map$1 (xs, f) {
  if (xs.map) return xs.map(f);
  var res = [];
  for (var i = 0; i < xs.length; i++) {
    res.push(f(xs[i], i));
  }
  return res;
}

var objectKeys = Object.keys || function (obj) {
  var res = [];
  for (var key in obj) {
    if (Object.prototype.hasOwnProperty.call(obj, key)) res.push(key);
  }
  return res;
};

function parse$2(qs, sep, eq, options) {
  sep = sep || '&';
  eq = eq || '=';
  var obj = {};

  if (typeof qs !== 'string' || qs.length === 0) {
    return obj;
  }

  var regexp = /\+/g;
  qs = qs.split(sep);

  var maxKeys = 1000;
  if (options && typeof options.maxKeys === 'number') {
    maxKeys = options.maxKeys;
  }

  var len = qs.length;
  // maxKeys <= 0 means that we should not limit keys count
  if (maxKeys > 0 && len > maxKeys) {
    len = maxKeys;
  }

  for (var i = 0; i < len; ++i) {
    var x = qs[i].replace(regexp, '%20'),
        idx = x.indexOf(eq),
        kstr, vstr, k, v;

    if (idx >= 0) {
      kstr = x.substr(0, idx);
      vstr = x.substr(idx + 1);
    } else {
      kstr = x;
      vstr = '';
    }

    k = decodeURIComponent(kstr);
    v = decodeURIComponent(vstr);

    if (!hasOwnProperty$2(obj, k)) {
      obj[k] = v;
    } else if (isArray$3(obj[k])) {
      obj[k].push(v);
    } else {
      obj[k] = [obj[k], v];
    }
  }

  return obj;
}

// Copyright Joyent, Inc. and other Node contributors.
var _polyfillNode_url = {
  parse: urlParse,
  resolve: urlResolve,
  resolveObject: urlResolveObject,
  format: urlFormat,
  Url: Url
};
function Url() {
  this.protocol = null;
  this.slashes = null;
  this.auth = null;
  this.host = null;
  this.port = null;
  this.hostname = null;
  this.hash = null;
  this.search = null;
  this.query = null;
  this.pathname = null;
  this.path = null;
  this.href = null;
}

// Reference: RFC 3986, RFC 1808, RFC 2396

// define these here so at least they only have to be
// compiled once on the first module load.
var protocolPattern = /^([a-z0-9.+-]+:)/i,
  portPattern = /:[0-9]*$/,

  // Special case for a simple path URL
  simplePathPattern = /^(\/\/?(?!\/)[^\?\s]*)(\?[^\s]*)?$/,

  // RFC 2396: characters reserved for delimiting URLs.
  // We actually just auto-escape these.
  delims = ['<', '>', '"', '`', ' ', '\r', '\n', '\t'],

  // RFC 2396: characters not allowed for various reasons.
  unwise = ['{', '}', '|', '\\', '^', '`'].concat(delims),

  // Allowed by RFCs, but cause of XSS attacks.  Always escape these.
  autoEscape = ['\''].concat(unwise),
  // Characters that are never ever allowed in a hostname.
  // Note that any invalid chars are also handled, but these
  // are the ones that are *expected* to be seen, so we fast-path
  // them.
  nonHostChars = ['%', '/', '?', ';', '#'].concat(autoEscape),
  hostEndingChars = ['/', '?', '#'],
  hostnameMaxLen = 255,
  hostnamePartPattern = /^[+a-z0-9A-Z_-]{0,63}$/,
  hostnamePartStart = /^([+a-z0-9A-Z_-]{0,63})(.*)$/,
  // protocols that can allow "unsafe" and "unwise" chars.
  unsafeProtocol = {
    'javascript': true,
    'javascript:': true
  },
  // protocols that never have a hostname.
  hostlessProtocol = {
    'javascript': true,
    'javascript:': true
  },
  // protocols that always contain a // bit.
  slashedProtocol = {
    'http': true,
    'https': true,
    'ftp': true,
    'gopher': true,
    'file': true,
    'http:': true,
    'https:': true,
    'ftp:': true,
    'gopher:': true,
    'file:': true
  };

function urlParse(url, parseQueryString, slashesDenoteHost) {
  if (url && isObject$2(url) && url instanceof Url) return url;

  var u = new Url;
  u.parse(url, parseQueryString, slashesDenoteHost);
  return u;
}
Url.prototype.parse = function(url, parseQueryString, slashesDenoteHost) {
  return parse$3(this, url, parseQueryString, slashesDenoteHost);
};

function parse$3(self, url, parseQueryString, slashesDenoteHost) {
  if (!isString$1(url)) {
    throw new TypeError('Parameter \'url\' must be a string, not ' + typeof url);
  }

  // Copy chrome, IE, opera backslash-handling behavior.
  // Back slashes before the query string get converted to forward slashes
  // See: https://code.google.com/p/chromium/issues/detail?id=25916
  var queryIndex = url.indexOf('?'),
    splitter =
    (queryIndex !== -1 && queryIndex < url.indexOf('#')) ? '?' : '#',
    uSplit = url.split(splitter),
    slashRegex = /\\/g;
  uSplit[0] = uSplit[0].replace(slashRegex, '/');
  url = uSplit.join(splitter);

  var rest = url;

  // trim before proceeding.
  // This is to support parse stuff like "  http://foo.com  \n"
  rest = rest.trim();

  if (!slashesDenoteHost && url.split('#').length === 1) {
    // Try fast path regexp
    var simplePath = simplePathPattern.exec(rest);
    if (simplePath) {
      self.path = rest;
      self.href = rest;
      self.pathname = simplePath[1];
      if (simplePath[2]) {
        self.search = simplePath[2];
        if (parseQueryString) {
          self.query = parse$2(self.search.substr(1));
        } else {
          self.query = self.search.substr(1);
        }
      } else if (parseQueryString) {
        self.search = '';
        self.query = {};
      }
      return self;
    }
  }

  var proto = protocolPattern.exec(rest);
  if (proto) {
    proto = proto[0];
    var lowerProto = proto.toLowerCase();
    self.protocol = lowerProto;
    rest = rest.substr(proto.length);
  }

  // figure out if it's got a host
  // user@server is *always* interpreted as a hostname, and url
  // resolution will treat //foo/bar as host=foo,path=bar because that's
  // how the browser resolves relative URLs.
  if (slashesDenoteHost || proto || rest.match(/^\/\/[^@\/]+@[^@\/]+/)) {
    var slashes = rest.substr(0, 2) === '//';
    if (slashes && !(proto && hostlessProtocol[proto])) {
      rest = rest.substr(2);
      self.slashes = true;
    }
  }
  var i, hec, l, p;
  if (!hostlessProtocol[proto] &&
    (slashes || (proto && !slashedProtocol[proto]))) {

    // there's a hostname.
    // the first instance of /, ?, ;, or # ends the host.
    //
    // If there is an @ in the hostname, then non-host chars *are* allowed
    // to the left of the last @ sign, unless some host-ending character
    // comes *before* the @-sign.
    // URLs are obnoxious.
    //
    // ex:
    // http://a@b@c/ => user:a@b host:c
    // http://a@b?@c => user:a host:c path:/?@c

    // v0.12 TODO(isaacs): This is not quite how Chrome does things.
    // Review our test case against browsers more comprehensively.

    // find the first instance of any hostEndingChars
    var hostEnd = -1;
    for (i = 0; i < hostEndingChars.length; i++) {
      hec = rest.indexOf(hostEndingChars[i]);
      if (hec !== -1 && (hostEnd === -1 || hec < hostEnd))
        hostEnd = hec;
    }

    // at this point, either we have an explicit point where the
    // auth portion cannot go past, or the last @ char is the decider.
    var auth, atSign;
    if (hostEnd === -1) {
      // atSign can be anywhere.
      atSign = rest.lastIndexOf('@');
    } else {
      // atSign must be in auth portion.
      // http://a@b/c@d => host:b auth:a path:/c@d
      atSign = rest.lastIndexOf('@', hostEnd);
    }

    // Now we have a portion which is definitely the auth.
    // Pull that off.
    if (atSign !== -1) {
      auth = rest.slice(0, atSign);
      rest = rest.slice(atSign + 1);
      self.auth = decodeURIComponent(auth);
    }

    // the host is the remaining to the left of the first non-host char
    hostEnd = -1;
    for (i = 0; i < nonHostChars.length; i++) {
      hec = rest.indexOf(nonHostChars[i]);
      if (hec !== -1 && (hostEnd === -1 || hec < hostEnd))
        hostEnd = hec;
    }
    // if we still have not hit it, then the entire thing is a host.
    if (hostEnd === -1)
      hostEnd = rest.length;

    self.host = rest.slice(0, hostEnd);
    rest = rest.slice(hostEnd);

    // pull out port.
    parseHost(self);

    // we've indicated that there is a hostname,
    // so even if it's empty, it has to be present.
    self.hostname = self.hostname || '';

    // if hostname begins with [ and ends with ]
    // assume that it's an IPv6 address.
    var ipv6Hostname = self.hostname[0] === '[' &&
      self.hostname[self.hostname.length - 1] === ']';

    // validate a little.
    if (!ipv6Hostname) {
      var hostparts = self.hostname.split(/\./);
      for (i = 0, l = hostparts.length; i < l; i++) {
        var part = hostparts[i];
        if (!part) continue;
        if (!part.match(hostnamePartPattern)) {
          var newpart = '';
          for (var j = 0, k = part.length; j < k; j++) {
            if (part.charCodeAt(j) > 127) {
              // we replace non-ASCII char with a temporary placeholder
              // we need this to make sure size of hostname is not
              // broken by replacing non-ASCII by nothing
              newpart += 'x';
            } else {
              newpart += part[j];
            }
          }
          // we test again with ASCII char only
          if (!newpart.match(hostnamePartPattern)) {
            var validParts = hostparts.slice(0, i);
            var notHost = hostparts.slice(i + 1);
            var bit = part.match(hostnamePartStart);
            if (bit) {
              validParts.push(bit[1]);
              notHost.unshift(bit[2]);
            }
            if (notHost.length) {
              rest = '/' + notHost.join('.') + rest;
            }
            self.hostname = validParts.join('.');
            break;
          }
        }
      }
    }

    if (self.hostname.length > hostnameMaxLen) {
      self.hostname = '';
    } else {
      // hostnames are always lower case.
      self.hostname = self.hostname.toLowerCase();
    }

    if (!ipv6Hostname) {
      // IDNA Support: Returns a punycoded representation of "domain".
      // It only converts parts of the domain name that
      // have non-ASCII characters, i.e. it doesn't matter if
      // you call it with a domain that already is ASCII-only.
      self.hostname = toASCII(self.hostname);
    }

    p = self.port ? ':' + self.port : '';
    var h = self.hostname || '';
    self.host = h + p;
    self.href += self.host;

    // strip [ and ] from the hostname
    // the host field still retains them, though
    if (ipv6Hostname) {
      self.hostname = self.hostname.substr(1, self.hostname.length - 2);
      if (rest[0] !== '/') {
        rest = '/' + rest;
      }
    }
  }

  // now rest is set to the post-host stuff.
  // chop off any delim chars.
  if (!unsafeProtocol[lowerProto]) {

    // First, make 100% sure that any "autoEscape" chars get
    // escaped, even if encodeURIComponent doesn't think they
    // need to be.
    for (i = 0, l = autoEscape.length; i < l; i++) {
      var ae = autoEscape[i];
      if (rest.indexOf(ae) === -1)
        continue;
      var esc = encodeURIComponent(ae);
      if (esc === ae) {
        esc = escape(ae);
      }
      rest = rest.split(ae).join(esc);
    }
  }


  // chop off from the tail first.
  var hash = rest.indexOf('#');
  if (hash !== -1) {
    // got a fragment string.
    self.hash = rest.substr(hash);
    rest = rest.slice(0, hash);
  }
  var qm = rest.indexOf('?');
  if (qm !== -1) {
    self.search = rest.substr(qm);
    self.query = rest.substr(qm + 1);
    if (parseQueryString) {
      self.query = parse$2(self.query);
    }
    rest = rest.slice(0, qm);
  } else if (parseQueryString) {
    // no query string, but parseQueryString still requested
    self.search = '';
    self.query = {};
  }
  if (rest) self.pathname = rest;
  if (slashedProtocol[lowerProto] &&
    self.hostname && !self.pathname) {
    self.pathname = '/';
  }

  //to support http.request
  if (self.pathname || self.search) {
    p = self.pathname || '';
    var s = self.search || '';
    self.path = p + s;
  }

  // finally, reconstruct the href based on what has been validated.
  self.href = format$1(self);
  return self;
}

// format a parsed object into a url string
function urlFormat(obj) {
  // ensure it's an object, and not a string url.
  // If it's an obj, this is a no-op.
  // this way, you can call url_format() on strings
  // to clean up potentially wonky urls.
  if (isString$1(obj)) obj = parse$3({}, obj);
  return format$1(obj);
}

function format$1(self) {
  var auth = self.auth || '';
  if (auth) {
    auth = encodeURIComponent(auth);
    auth = auth.replace(/%3A/i, ':');
    auth += '@';
  }

  var protocol = self.protocol || '',
    pathname = self.pathname || '',
    hash = self.hash || '',
    host = false,
    query = '';

  if (self.host) {
    host = auth + self.host;
  } else if (self.hostname) {
    host = auth + (self.hostname.indexOf(':') === -1 ?
      self.hostname :
      '[' + this.hostname + ']');
    if (self.port) {
      host += ':' + self.port;
    }
  }

  if (self.query &&
    isObject$2(self.query) &&
    Object.keys(self.query).length) {
    query = stringify(self.query);
  }

  var search = self.search || (query && ('?' + query)) || '';

  if (protocol && protocol.substr(-1) !== ':') protocol += ':';

  // only the slashedProtocols get the //.  Not mailto:, xmpp:, etc.
  // unless they had them to begin with.
  if (self.slashes ||
    (!protocol || slashedProtocol[protocol]) && host !== false) {
    host = '//' + (host || '');
    if (pathname && pathname.charAt(0) !== '/') pathname = '/' + pathname;
  } else if (!host) {
    host = '';
  }

  if (hash && hash.charAt(0) !== '#') hash = '#' + hash;
  if (search && search.charAt(0) !== '?') search = '?' + search;

  pathname = pathname.replace(/[?#]/g, function(match) {
    return encodeURIComponent(match);
  });
  search = search.replace('#', '%23');

  return protocol + host + pathname + search + hash;
}

Url.prototype.format = function() {
  return format$1(this);
};

function urlResolve(source, relative) {
  return urlParse(source, false, true).resolve(relative);
}

Url.prototype.resolve = function(relative) {
  return this.resolveObject(urlParse(relative, false, true)).format();
};

function urlResolveObject(source, relative) {
  if (!source) return relative;
  return urlParse(source, false, true).resolveObject(relative);
}

Url.prototype.resolveObject = function(relative) {
  if (isString$1(relative)) {
    var rel = new Url();
    rel.parse(relative, false, true);
    relative = rel;
  }

  var result = new Url();
  var tkeys = Object.keys(this);
  for (var tk = 0; tk < tkeys.length; tk++) {
    var tkey = tkeys[tk];
    result[tkey] = this[tkey];
  }

  // hash is always overridden, no matter what.
  // even href="" will remove it.
  result.hash = relative.hash;

  // if the relative url is empty, then there's nothing left to do here.
  if (relative.href === '') {
    result.href = result.format();
    return result;
  }

  // hrefs like //foo/bar always cut to the protocol.
  if (relative.slashes && !relative.protocol) {
    // take everything except the protocol from relative
    var rkeys = Object.keys(relative);
    for (var rk = 0; rk < rkeys.length; rk++) {
      var rkey = rkeys[rk];
      if (rkey !== 'protocol')
        result[rkey] = relative[rkey];
    }

    //urlParse appends trailing / to urls like http://www.example.com
    if (slashedProtocol[result.protocol] &&
      result.hostname && !result.pathname) {
      result.path = result.pathname = '/';
    }

    result.href = result.format();
    return result;
  }
  var relPath;
  if (relative.protocol && relative.protocol !== result.protocol) {
    // if it's a known url protocol, then changing
    // the protocol does weird things
    // first, if it's not file:, then we MUST have a host,
    // and if there was a path
    // to begin with, then we MUST have a path.
    // if it is file:, then the host is dropped,
    // because that's known to be hostless.
    // anything else is assumed to be absolute.
    if (!slashedProtocol[relative.protocol]) {
      var keys = Object.keys(relative);
      for (var v = 0; v < keys.length; v++) {
        var k = keys[v];
        result[k] = relative[k];
      }
      result.href = result.format();
      return result;
    }

    result.protocol = relative.protocol;
    if (!relative.host && !hostlessProtocol[relative.protocol]) {
      relPath = (relative.pathname || '').split('/');
      while (relPath.length && !(relative.host = relPath.shift()));
      if (!relative.host) relative.host = '';
      if (!relative.hostname) relative.hostname = '';
      if (relPath[0] !== '') relPath.unshift('');
      if (relPath.length < 2) relPath.unshift('');
      result.pathname = relPath.join('/');
    } else {
      result.pathname = relative.pathname;
    }
    result.search = relative.search;
    result.query = relative.query;
    result.host = relative.host || '';
    result.auth = relative.auth;
    result.hostname = relative.hostname || relative.host;
    result.port = relative.port;
    // to support http.request
    if (result.pathname || result.search) {
      var p = result.pathname || '';
      var s = result.search || '';
      result.path = p + s;
    }
    result.slashes = result.slashes || relative.slashes;
    result.href = result.format();
    return result;
  }

  var isSourceAbs = (result.pathname && result.pathname.charAt(0) === '/'),
    isRelAbs = (
      relative.host ||
      relative.pathname && relative.pathname.charAt(0) === '/'
    ),
    mustEndAbs = (isRelAbs || isSourceAbs ||
      (result.host && relative.pathname)),
    removeAllDots = mustEndAbs,
    srcPath = result.pathname && result.pathname.split('/') || [],
    psychotic = result.protocol && !slashedProtocol[result.protocol];
  relPath = relative.pathname && relative.pathname.split('/') || [];
  // if the url is a non-slashed url, then relative
  // links like ../.. should be able
  // to crawl up to the hostname, as well.  This is strange.
  // result.protocol has already been set by now.
  // Later on, put the first path part into the host field.
  if (psychotic) {
    result.hostname = '';
    result.port = null;
    if (result.host) {
      if (srcPath[0] === '') srcPath[0] = result.host;
      else srcPath.unshift(result.host);
    }
    result.host = '';
    if (relative.protocol) {
      relative.hostname = null;
      relative.port = null;
      if (relative.host) {
        if (relPath[0] === '') relPath[0] = relative.host;
        else relPath.unshift(relative.host);
      }
      relative.host = null;
    }
    mustEndAbs = mustEndAbs && (relPath[0] === '' || srcPath[0] === '');
  }
  var authInHost;
  if (isRelAbs) {
    // it's absolute.
    result.host = (relative.host || relative.host === '') ?
      relative.host : result.host;
    result.hostname = (relative.hostname || relative.hostname === '') ?
      relative.hostname : result.hostname;
    result.search = relative.search;
    result.query = relative.query;
    srcPath = relPath;
    // fall through to the dot-handling below.
  } else if (relPath.length) {
    // it's relative
    // throw away the existing file, and take the new path instead.
    if (!srcPath) srcPath = [];
    srcPath.pop();
    srcPath = srcPath.concat(relPath);
    result.search = relative.search;
    result.query = relative.query;
  } else if (!isNullOrUndefined(relative.search)) {
    // just pull out the search.
    // like href='?foo'.
    // Put this after the other two cases because it simplifies the booleans
    if (psychotic) {
      result.hostname = result.host = srcPath.shift();
      //occationaly the auth can get stuck only in host
      //this especially happens in cases like
      //url.resolveObject('mailto:local1@domain1', 'local2@domain2')
      authInHost = result.host && result.host.indexOf('@') > 0 ?
        result.host.split('@') : false;
      if (authInHost) {
        result.auth = authInHost.shift();
        result.host = result.hostname = authInHost.shift();
      }
    }
    result.search = relative.search;
    result.query = relative.query;
    //to support http.request
    if (!isNull(result.pathname) || !isNull(result.search)) {
      result.path = (result.pathname ? result.pathname : '') +
        (result.search ? result.search : '');
    }
    result.href = result.format();
    return result;
  }

  if (!srcPath.length) {
    // no path at all.  easy.
    // we've already handled the other stuff above.
    result.pathname = null;
    //to support http.request
    if (result.search) {
      result.path = '/' + result.search;
    } else {
      result.path = null;
    }
    result.href = result.format();
    return result;
  }

  // if a url ENDs in . or .., then it must get a trailing slash.
  // however, if it ends in anything else non-slashy,
  // then it must NOT get a trailing slash.
  var last = srcPath.slice(-1)[0];
  var hasTrailingSlash = (
    (result.host || relative.host || srcPath.length > 1) &&
    (last === '.' || last === '..') || last === '');

  // strip single dots, resolve double dots to parent dir
  // if the path tries to go above the root, `up` ends up > 0
  var up = 0;
  for (var i = srcPath.length; i >= 0; i--) {
    last = srcPath[i];
    if (last === '.') {
      srcPath.splice(i, 1);
    } else if (last === '..') {
      srcPath.splice(i, 1);
      up++;
    } else if (up) {
      srcPath.splice(i, 1);
      up--;
    }
  }

  // if the path is allowed to go above the root, restore leading ..s
  if (!mustEndAbs && !removeAllDots) {
    for (; up--; up) {
      srcPath.unshift('..');
    }
  }

  if (mustEndAbs && srcPath[0] !== '' &&
    (!srcPath[0] || srcPath[0].charAt(0) !== '/')) {
    srcPath.unshift('');
  }

  if (hasTrailingSlash && (srcPath.join('/').substr(-1) !== '/')) {
    srcPath.push('');
  }

  var isAbsolute = srcPath[0] === '' ||
    (srcPath[0] && srcPath[0].charAt(0) === '/');

  // put the host back
  if (psychotic) {
    result.hostname = result.host = isAbsolute ? '' :
      srcPath.length ? srcPath.shift() : '';
    //occationaly the auth can get stuck only in host
    //this especially happens in cases like
    //url.resolveObject('mailto:local1@domain1', 'local2@domain2')
    authInHost = result.host && result.host.indexOf('@') > 0 ?
      result.host.split('@') : false;
    if (authInHost) {
      result.auth = authInHost.shift();
      result.host = result.hostname = authInHost.shift();
    }
  }

  mustEndAbs = mustEndAbs || (result.host && srcPath.length);

  if (mustEndAbs && !isAbsolute) {
    srcPath.unshift('');
  }

  if (!srcPath.length) {
    result.pathname = null;
    result.path = null;
  } else {
    result.pathname = srcPath.join('/');
  }

  //to support request.http
  if (!isNull(result.pathname) || !isNull(result.search)) {
    result.path = (result.pathname ? result.pathname : '') +
      (result.search ? result.search : '');
  }
  result.auth = relative.auth || result.auth;
  result.slashes = result.slashes || relative.slashes;
  result.href = result.format();
  return result;
};

Url.prototype.parseHost = function() {
  return parseHost(this);
};

function parseHost(self) {
  var host = self.host;
  var port = portPattern.exec(host);
  if (port) {
    port = port[0];
    if (port !== ':') {
      self.port = port.substr(1);
    }
    host = host.substr(0, host.length - port.length);
  }
  if (host) self.hostname = host;
}

var _polyfillNode_url$1 = /*#__PURE__*/Object.freeze({
  __proto__: null,
  parse: urlParse,
  resolve: urlResolve,
  resolveObject: urlResolveObject,
  format: urlFormat,
  'default': _polyfillNode_url,
  Url: Url
});

function isRelativeUrl(url) {
    const firstChar = url.charAt(0);
    return firstChar === '.' || firstChar === '~' || firstChar === '@';
}
const externalRE = /^(https?:)?\/\//;
function isExternalUrl(url) {
    return externalRE.test(url);
}
const dataUrlRE = /^\s*data:/i;
function isDataUrl(url) {
    return dataUrlRE.test(url);
}
/**
 * Parses string url into URL object.
 */
function parseUrl(url) {
    const firstChar = url.charAt(0);
    if (firstChar === '~') {
        const secondChar = url.charAt(1);
        url = url.slice(secondChar === '/' ? 2 : 1);
    }
    return parseUriParts(url);
}
/**
 * vuejs/component-compiler-utils#22 Support uri fragment in transformed require
 * @param urlString an url as a string
 */
function parseUriParts(urlString) {
    // A TypeError is thrown if urlString is not a string
    // @see https://nodejs.org/api/url.html#url_url_parse_urlstring_parsequerystring_slashesdenotehost
    return urlParse(isString(urlString) ? urlString : '', false, true);
}

const defaultAssetUrlOptions = {
    base: null,
    includeAbsolute: false,
    tags: {
        video: ['src', 'poster'],
        source: ['src'],
        img: ['src'],
        image: ['xlink:href', 'href'],
        use: ['xlink:href', 'href']
    }
};
const normalizeOptions = (options) => {
    if (Object.keys(options).some(key => isArray(options[key]))) {
        // legacy option format which directly passes in tags config
        return Object.assign(Object.assign({}, defaultAssetUrlOptions), { tags: options });
    }
    return Object.assign(Object.assign({}, defaultAssetUrlOptions), options);
};
const createAssetUrlTransformWithOptions = (options) => {
    return (node, context) => transformAssetUrl(node, context, options);
};
/**
 * A `@vue/compiler-core` plugin that transforms relative asset urls into
 * either imports or absolute urls.
 *
 * ``` js
 * // Before
 * createVNode('img', { src: './logo.png' })
 *
 * // After
 * import _imports_0 from './logo.png'
 * createVNode('img', { src: _imports_0 })
 * ```
 */
const transformAssetUrl = (node, context, options = defaultAssetUrlOptions) => {
    if (node.type === 1 /* ELEMENT */) {
        if (!node.props.length) {
            return;
        }
        const tags = options.tags || defaultAssetUrlOptions.tags;
        const attrs = tags[node.tag];
        const wildCardAttrs = tags['*'];
        if (!attrs && !wildCardAttrs) {
            return;
        }
        const assetAttrs = (attrs || []).concat(wildCardAttrs || []);
        node.props.forEach((attr, index) => {
            if (attr.type !== 6 /* ATTRIBUTE */ ||
                !assetAttrs.includes(attr.name) ||
                !attr.value ||
                isExternalUrl(attr.value.content) ||
                isDataUrl(attr.value.content) ||
                attr.value.content[0] === '#' ||
                (!options.includeAbsolute && !isRelativeUrl(attr.value.content))) {
                return;
            }
            const url = parseUrl(attr.value.content);
            if (options.base && attr.value.content[0] === '.') {
                // explicit base - directly rewrite relative urls into absolute url
                // to avoid generating extra imports
                // Allow for full hostnames provided in options.base
                const base = parseUrl(options.base);
                const protocol = base.protocol || '';
                const host = base.host ? protocol + '//' + base.host : '';
                const basePath = base.path || '/';
                // when packaged in the browser, path will be using the posix-
                // only version provided by rollup-plugin-node-builtins.
                attr.value.content =
                    host +
                        (path.posix || path).join(basePath, url.path + (url.hash || ''));
                return;
            }
            // otherwise, transform the url into an import.
            // this assumes a bundler will resolve the import into the correct
            // absolute url (e.g. webpack file-loader)
            const exp = getImportsExpressionExp(url.path, url.hash, attr.loc, context);
            node.props[index] = {
                type: 7 /* DIRECTIVE */,
                name: 'bind',
                arg: createSimpleExpression(attr.name, true, attr.loc),
                exp,
                modifiers: [],
                loc: attr.loc
            };
        });
    }
};
function getImportsExpressionExp(path, hash, loc, context) {
    if (path) {
        let name;
        let exp;
        const existingIndex = context.imports.findIndex(i => i.path === path);
        if (existingIndex > -1) {
            name = `_imports_${existingIndex}`;
            exp = context.imports[existingIndex].exp;
        }
        else {
            name = `_imports_${context.imports.length}`;
            exp = createSimpleExpression(name, false, loc, 3 /* CAN_STRINGIFY */);
            context.imports.push({ exp, path });
        }
        if (!hash) {
            return exp;
        }
        const hashExp = `${name} + '${hash}'`;
        const finalExp = createSimpleExpression(hashExp, false, loc, 3 /* CAN_STRINGIFY */);
        if (!context.hoistStatic) {
            return finalExp;
        }
        const existingHoistIndex = context.hoists.findIndex(h => {
            return (h &&
                h.type === 4 /* SIMPLE_EXPRESSION */ &&
                !h.isStatic &&
                h.content === hashExp);
        });
        if (existingHoistIndex > -1) {
            return createSimpleExpression(`_hoisted_${existingHoistIndex + 1}`, false, loc, 3 /* CAN_STRINGIFY */);
        }
        return context.hoist(finalExp);
    }
    else {
        return createSimpleExpression(`''`, false, loc, 3 /* CAN_STRINGIFY */);
    }
}

const srcsetTags = ['img', 'source'];
// http://w3c.github.io/html/semantics-embedded-content.html#ref-for-image-candidate-string-5
const escapedSpaceCharacters = /( |\\t|\\n|\\f|\\r)+/g;
const createSrcsetTransformWithOptions = (options) => {
    return (node, context) => transformSrcset(node, context, options);
};
const transformSrcset = (node, context, options = defaultAssetUrlOptions) => {
    if (node.type === 1 /* ELEMENT */) {
        if (srcsetTags.includes(node.tag) && node.props.length) {
            node.props.forEach((attr, index) => {
                if (attr.name === 'srcset' && attr.type === 6 /* ATTRIBUTE */) {
                    if (!attr.value)
                        return;
                    const value = attr.value.content;
                    if (!value)
                        return;
                    const imageCandidates = value.split(',').map(s => {
                        // The attribute value arrives here with all whitespace, except
                        // normal spaces, represented by escape sequences
                        const [url, descriptor] = s
                            .replace(escapedSpaceCharacters, ' ')
                            .trim()
                            .split(' ', 2);
                        return { url, descriptor };
                    });
                    // data urls contains comma after the encoding so we need to re-merge
                    // them
                    for (let i = 0; i < imageCandidates.length; i++) {
                        const { url } = imageCandidates[i];
                        if (isDataUrl(url)) {
                            imageCandidates[i + 1].url =
                                url + ',' + imageCandidates[i + 1].url;
                            imageCandidates.splice(i, 1);
                        }
                    }
                    const shouldProcessUrl = (url) => {
                        return (!isExternalUrl(url) &&
                            !isDataUrl(url) &&
                            (options.includeAbsolute || isRelativeUrl(url)));
                    };
                    // When srcset does not contain any qualified URLs, skip transforming
                    if (!imageCandidates.some(({ url }) => shouldProcessUrl(url))) {
                        return;
                    }
                    if (options.base) {
                        const base = options.base;
                        const set = [];
                        let needImportTransform = false;
                        imageCandidates.forEach(candidate => {
                            let { url, descriptor } = candidate;
                            descriptor = descriptor ? ` ${descriptor}` : ``;
                            if (url[0] === '.') {
                                candidate.url = (path.posix || path).join(base, url);
                                set.push(candidate.url + descriptor);
                            }
                            else if (shouldProcessUrl(url)) {
                                needImportTransform = true;
                            }
                            else {
                                set.push(url + descriptor);
                            }
                        });
                        if (!needImportTransform) {
                            attr.value.content = set.join(', ');
                            return;
                        }
                    }
                    const compoundExpression = createCompoundExpression([], attr.loc);
                    imageCandidates.forEach(({ url, descriptor }, index) => {
                        if (shouldProcessUrl(url)) {
                            const { path } = parseUrl(url);
                            let exp;
                            if (path) {
                                const existingImportsIndex = context.imports.findIndex(i => i.path === path);
                                if (existingImportsIndex > -1) {
                                    exp = createSimpleExpression(`_imports_${existingImportsIndex}`, false, attr.loc, 3 /* CAN_STRINGIFY */);
                                }
                                else {
                                    exp = createSimpleExpression(`_imports_${context.imports.length}`, false, attr.loc, 3 /* CAN_STRINGIFY */);
                                    context.imports.push({ exp, path });
                                }
                                compoundExpression.children.push(exp);
                            }
                        }
                        else {
                            const exp = createSimpleExpression(`"${url}"`, false, attr.loc, 3 /* CAN_STRINGIFY */);
                            compoundExpression.children.push(exp);
                        }
                        const isNotLast = imageCandidates.length - 1 > index;
                        if (descriptor && isNotLast) {
                            compoundExpression.children.push(` + ' ${descriptor}, ' + `);
                        }
                        else if (descriptor) {
                            compoundExpression.children.push(` + ' ${descriptor}'`);
                        }
                        else if (isNotLast) {
                            compoundExpression.children.push(` + ', ' + `);
                        }
                    });
                    let exp = compoundExpression;
                    if (context.hoistStatic) {
                        exp = context.hoist(compoundExpression);
                        exp.constType = 3 /* CAN_STRINGIFY */;
                    }
                    node.props[index] = {
                        type: 7 /* DIRECTIVE */,
                        name: 'bind',
                        arg: createSimpleExpression('srcset', true, attr.loc),
                        exp,
                        modifiers: [],
                        loc: attr.loc
                    };
                }
            });
        }
    }
};

const SSR_INTERPOLATE = Symbol(`ssrInterpolate`);
const SSR_RENDER_VNODE = Symbol(`ssrRenderVNode`);
const SSR_RENDER_COMPONENT = Symbol(`ssrRenderComponent`);
const SSR_RENDER_SLOT = Symbol(`ssrRenderSlot`);
const SSR_RENDER_SLOT_INNER = Symbol(`ssrRenderSlotInner`);
const SSR_RENDER_CLASS = Symbol(`ssrRenderClass`);
const SSR_RENDER_STYLE = Symbol(`ssrRenderStyle`);
const SSR_RENDER_ATTRS = Symbol(`ssrRenderAttrs`);
const SSR_RENDER_ATTR = Symbol(`ssrRenderAttr`);
const SSR_RENDER_DYNAMIC_ATTR = Symbol(`ssrRenderDynamicAttr`);
const SSR_RENDER_LIST = Symbol(`ssrRenderList`);
const SSR_INCLUDE_BOOLEAN_ATTR = Symbol(`ssrIncludeBooleanAttr`);
const SSR_LOOSE_EQUAL = Symbol(`ssrLooseEqual`);
const SSR_LOOSE_CONTAIN = Symbol(`ssrLooseContain`);
const SSR_RENDER_DYNAMIC_MODEL = Symbol(`ssrRenderDynamicModel`);
const SSR_GET_DYNAMIC_MODEL_PROPS = Symbol(`ssrGetDynamicModelProps`);
const SSR_RENDER_TELEPORT = Symbol(`ssrRenderTeleport`);
const SSR_RENDER_SUSPENSE = Symbol(`ssrRenderSuspense`);
const SSR_GET_DIRECTIVE_PROPS = Symbol(`ssrGetDirectiveProps`);
const ssrHelpers = {
    [SSR_INTERPOLATE]: `ssrInterpolate`,
    [SSR_RENDER_VNODE]: `ssrRenderVNode`,
    [SSR_RENDER_COMPONENT]: `ssrRenderComponent`,
    [SSR_RENDER_SLOT]: `ssrRenderSlot`,
    [SSR_RENDER_SLOT_INNER]: `ssrRenderSlotInner`,
    [SSR_RENDER_CLASS]: `ssrRenderClass`,
    [SSR_RENDER_STYLE]: `ssrRenderStyle`,
    [SSR_RENDER_ATTRS]: `ssrRenderAttrs`,
    [SSR_RENDER_ATTR]: `ssrRenderAttr`,
    [SSR_RENDER_DYNAMIC_ATTR]: `ssrRenderDynamicAttr`,
    [SSR_RENDER_LIST]: `ssrRenderList`,
    [SSR_INCLUDE_BOOLEAN_ATTR]: `ssrIncludeBooleanAttr`,
    [SSR_LOOSE_EQUAL]: `ssrLooseEqual`,
    [SSR_LOOSE_CONTAIN]: `ssrLooseContain`,
    [SSR_RENDER_DYNAMIC_MODEL]: `ssrRenderDynamicModel`,
    [SSR_GET_DYNAMIC_MODEL_PROPS]: `ssrGetDynamicModelProps`,
    [SSR_RENDER_TELEPORT]: `ssrRenderTeleport`,
    [SSR_RENDER_SUSPENSE]: `ssrRenderSuspense`,
    [SSR_GET_DIRECTIVE_PROPS]: `ssrGetDirectiveProps`
};
// Note: these are helpers imported from @vue/server-renderer
// make sure the names match!
registerRuntimeHelpers(ssrHelpers);

// Plugin for the first transform pass, which simply constructs the AST node
const ssrTransformIf = createStructuralDirectiveTransform(/^(if|else|else-if)$/, processIf);
// This is called during the 2nd transform pass to construct the SSR-specific
// codegen nodes.
function ssrProcessIf(node, context, disableNestedFragments = false) {
    const [rootBranch] = node.branches;
    const ifStatement = createIfStatement(rootBranch.condition, processIfBranch(rootBranch, context, disableNestedFragments));
    context.pushStatement(ifStatement);
    let currentIf = ifStatement;
    for (let i = 1; i < node.branches.length; i++) {
        const branch = node.branches[i];
        const branchBlockStatement = processIfBranch(branch, context, disableNestedFragments);
        if (branch.condition) {
            // else-if
            currentIf = currentIf.alternate = createIfStatement(branch.condition, branchBlockStatement);
        }
        else {
            // else
            currentIf.alternate = branchBlockStatement;
        }
    }
    if (!currentIf.alternate) {
        currentIf.alternate = createBlockStatement([
            createCallExpression(`_push`, ['`<!---->`'])
        ]);
    }
}
function processIfBranch(branch, context, disableNestedFragments = false) {
    const { children } = branch;
    const needFragmentWrapper = !disableNestedFragments &&
        (children.length !== 1 || children[0].type !== 1 /* ELEMENT */) &&
        // optimize away nested fragments when the only child is a ForNode
        !(children.length === 1 && children[0].type === 11 /* FOR */);
    return processChildrenAsStatement(branch, context, needFragmentWrapper);
}

// Plugin for the first transform pass, which simply constructs the AST node
const ssrTransformFor = createStructuralDirectiveTransform('for', processFor);
// This is called during the 2nd transform pass to construct the SSR-specific
// codegen nodes.
function ssrProcessFor(node, context, disableNestedFragments = false) {
    const needFragmentWrapper = !disableNestedFragments &&
        (node.children.length !== 1 || node.children[0].type !== 1 /* ELEMENT */);
    const renderLoop = createFunctionExpression(createForLoopParams(node.parseResult));
    renderLoop.body = processChildrenAsStatement(node, context, needFragmentWrapper);
    // v-for always renders a fragment unless explicitly disabled
    if (!disableNestedFragments) {
        context.pushStringPart(`<!--[-->`);
    }
    context.pushStatement(createCallExpression(context.helper(SSR_RENDER_LIST), [
        node.source,
        renderLoop
    ]));
    if (!disableNestedFragments) {
        context.pushStringPart(`<!--]-->`);
    }
}

const ssrTransformSlotOutlet = (node, context) => {
    if (isSlotOutlet(node)) {
        const { slotName, slotProps } = processSlotOutlet(node, context);
        const args = [
            `_ctx.$slots`,
            slotName,
            slotProps || `{}`,
            // fallback content placeholder. will be replaced in the process phase
            `null`,
            `_push`,
            `_parent`
        ];
        // inject slot scope id if current template uses :slotted
        if (context.scopeId && context.slotted !== false) {
            args.push(`"${context.scopeId}-s"`);
        }
        let method = SSR_RENDER_SLOT;
        // #3989
        // check if this is a single slot inside a transition wrapper - since
        // transition will unwrap the slot fragment into a single vnode at runtime,
        // we need to avoid rendering the slot as a fragment.
        const parent = context.parent;
        if (parent &&
            parent.type === 1 /* ELEMENT */ &&
            parent.tagType === 1 /* COMPONENT */ &&
            resolveComponentType(parent, context, true) === TRANSITION &&
            parent.children.filter(c => c.type === 1 /* ELEMENT */).length === 1) {
            method = SSR_RENDER_SLOT_INNER;
            if (!(context.scopeId && context.slotted !== false)) {
                args.push('null');
            }
            args.push('true');
        }
        node.ssrCodegenNode = createCallExpression(context.helper(method), args);
    }
};
function ssrProcessSlotOutlet(node, context) {
    const renderCall = node.ssrCodegenNode;
    // has fallback content
    if (node.children.length) {
        const fallbackRenderFn = createFunctionExpression([]);
        fallbackRenderFn.body = processChildrenAsStatement(node, context);
        // _renderSlot(slots, name, props, fallback, ...)
        renderCall.arguments[3] = fallbackRenderFn;
    }
    // Forwarded <slot/>. Merge slot scope ids
    if (context.withSlotScopeId) {
        const slotScopeId = renderCall.arguments[6];
        renderCall.arguments[6] = slotScopeId
            ? `${slotScopeId} + _scopeId`
            : `_scopeId`;
    }
    context.pushStatement(node.ssrCodegenNode);
}

function createSSRCompilerError(code, loc) {
    return createCompilerError(code, loc, SSRErrorMessages);
}
const SSRErrorMessages = {
    [61 /* X_SSR_UNSAFE_ATTR_NAME */]: `Unsafe attribute name for SSR.`,
    [62 /* X_SSR_NO_TELEPORT_TARGET */]: `Missing the 'to' prop on teleport element.`,
    [63 /* X_SSR_INVALID_AST_NODE */]: `Invalid AST node during SSR transform.`
};

// Note: this is a 2nd-pass codegen transform.
function ssrProcessTeleport(node, context) {
    const targetProp = findProp(node, 'to');
    if (!targetProp) {
        context.onError(createSSRCompilerError(62 /* X_SSR_NO_TELEPORT_TARGET */, node.loc));
        return;
    }
    let target;
    if (targetProp.type === 6 /* ATTRIBUTE */) {
        target =
            targetProp.value && createSimpleExpression(targetProp.value.content, true);
    }
    else {
        target = targetProp.exp;
    }
    if (!target) {
        context.onError(createSSRCompilerError(62 /* X_SSR_NO_TELEPORT_TARGET */, targetProp.loc));
        return;
    }
    const disabledProp = findProp(node, 'disabled', false, true /* allow empty */);
    const disabled = disabledProp
        ? disabledProp.type === 6 /* ATTRIBUTE */
            ? `true`
            : disabledProp.exp || `false`
        : `false`;
    const contentRenderFn = createFunctionExpression([`_push`], undefined, // Body is added later
    true, // newline
    false, // isSlot
    node.loc);
    contentRenderFn.body = processChildrenAsStatement(node, context);
    context.pushStatement(createCallExpression(context.helper(SSR_RENDER_TELEPORT), [
        `_push`,
        contentRenderFn,
        target,
        disabled,
        `_parent`
    ]));
}

const wipMap = new WeakMap();
// phase 1
function ssrTransformSuspense(node, context) {
    return () => {
        if (node.children.length) {
            const wipEntry = {
                slotsExp: null,
                wipSlots: []
            };
            wipMap.set(node, wipEntry);
            wipEntry.slotsExp = buildSlots(node, context, (_props, children, loc) => {
                const fn = createFunctionExpression([], undefined, // no return, assign body later
                true, // newline
                false, // suspense slots are not treated as normal slots
                loc);
                wipEntry.wipSlots.push({
                    fn,
                    children
                });
                return fn;
            }).slots;
        }
    };
}
// phase 2
function ssrProcessSuspense(node, context) {
    // complete wip slots with ssr code
    const wipEntry = wipMap.get(node);
    if (!wipEntry) {
        return;
    }
    const { slotsExp, wipSlots } = wipEntry;
    for (let i = 0; i < wipSlots.length; i++) {
        const slot = wipSlots[i];
        slot.fn.body = processChildrenAsStatement(slot, context);
    }
    // _push(ssrRenderSuspense(slots))
    context.pushStatement(createCallExpression(context.helper(SSR_RENDER_SUSPENSE), [
        `_push`,
        slotsExp
    ]));
}

// for directives with children overwrite (e.g. v-html & v-text), we need to
// store the raw children so that they can be added in the 2nd pass.
const rawChildrenMap = new WeakMap();
const ssrTransformElement = (node, context) => {
    if (node.type !== 1 /* ELEMENT */ ||
        node.tagType !== 0 /* ELEMENT */) {
        return;
    }
    return function ssrPostTransformElement() {
        // element
        // generate the template literal representing the open tag.
        const openTag = [`<${node.tag}`];
        // some tags need to be passed to runtime for special checks
        const needTagForRuntime = node.tag === 'textarea' || node.tag.indexOf('-') > 0;
        // v-bind="obj", v-bind:[key] and custom directives can potentially
        // overwrite other static attrs and can affect final rendering result,
        // so when they are present we need to bail out to full `renderAttrs`
        const hasDynamicVBind = hasDynamicKeyVBind(node);
        const hasCustomDir = node.props.some(p => p.type === 7 /* DIRECTIVE */ && !isBuiltInDirective(p.name));
        const needMergeProps = hasDynamicVBind || hasCustomDir;
        if (needMergeProps) {
            const { props, directives } = buildProps(node, context, node.props, false /* isComponent */, false /* isDynamicComponent */, true /* ssr */);
            if (props || directives.length) {
                const mergedProps = buildSSRProps(props, directives, context);
                const propsExp = createCallExpression(context.helper(SSR_RENDER_ATTRS), [mergedProps]);
                if (node.tag === 'textarea') {
                    const existingText = node.children[0];
                    // If interpolation, this is dynamic <textarea> content, potentially
                    // injected by v-model and takes higher priority than v-bind value
                    if (!existingText || existingText.type !== 5 /* INTERPOLATION */) {
                        // <textarea> with dynamic v-bind. We don't know if the final props
                        // will contain .value, so we will have to do something special:
                        // assign the merged props to a temp variable, and check whether
                        // it contains value (if yes, render is as children).
                        const tempId = `_temp${context.temps++}`;
                        propsExp.arguments = [
                            createAssignmentExpression(createSimpleExpression(tempId, false), mergedProps)
                        ];
                        rawChildrenMap.set(node, createCallExpression(context.helper(SSR_INTERPOLATE), [
                            createConditionalExpression(createSimpleExpression(`"value" in ${tempId}`, false), createSimpleExpression(`${tempId}.value`, false), createSimpleExpression(existingText ? existingText.content : ``, true), false)
                        ]));
                    }
                }
                else if (node.tag === 'input') {
                    // <input v-bind="obj" v-model>
                    // we need to determine the props to render for the dynamic v-model
                    // and merge it with the v-bind expression.
                    const vModel = findVModel(node);
                    if (vModel) {
                        // 1. save the props (san v-model) in a temp variable
                        const tempId = `_temp${context.temps++}`;
                        const tempExp = createSimpleExpression(tempId, false);
                        propsExp.arguments = [
                            createSequenceExpression([
                                createAssignmentExpression(tempExp, mergedProps),
                                createCallExpression(context.helper(MERGE_PROPS), [
                                    tempExp,
                                    createCallExpression(context.helper(SSR_GET_DYNAMIC_MODEL_PROPS), [
                                        tempExp,
                                        vModel.exp // model
                                    ])
                                ])
                            ])
                        ];
                    }
                }
                if (needTagForRuntime) {
                    propsExp.arguments.push(`"${node.tag}"`);
                }
                openTag.push(propsExp);
            }
        }
        // book keeping static/dynamic class merging.
        let dynamicClassBinding = undefined;
        let staticClassBinding = undefined;
        // all style bindings are converted to dynamic by transformStyle.
        // but we need to make sure to merge them.
        let dynamicStyleBinding = undefined;
        for (let i = 0; i < node.props.length; i++) {
            const prop = node.props[i];
            // ignore true-value/false-value on input
            if (node.tag === 'input' && isTrueFalseValue(prop)) {
                continue;
            }
            // special cases with children override
            if (prop.type === 7 /* DIRECTIVE */) {
                if (prop.name === 'html' && prop.exp) {
                    rawChildrenMap.set(node, prop.exp);
                }
                else if (prop.name === 'text' && prop.exp) {
                    node.children = [createInterpolation(prop.exp, prop.loc)];
                }
                else if (prop.name === 'slot') {
                    context.onError(createCompilerError(40 /* X_V_SLOT_MISPLACED */, prop.loc));
                }
                else if (isTextareaWithValue(node, prop) && prop.exp) {
                    if (!needMergeProps) {
                        node.children = [createInterpolation(prop.exp, prop.loc)];
                    }
                }
                else if (!needMergeProps && prop.name !== 'on') {
                    // Directive transforms.
                    const directiveTransform = context.directiveTransforms[prop.name];
                    if (directiveTransform) {
                        const { props, ssrTagParts } = directiveTransform(prop, node, context);
                        if (ssrTagParts) {
                            openTag.push(...ssrTagParts);
                        }
                        for (let j = 0; j < props.length; j++) {
                            const { key, value } = props[j];
                            if (isStaticExp(key)) {
                                let attrName = key.content;
                                // static key attr
                                if (attrName === 'key' || attrName === 'ref') {
                                    continue;
                                }
                                if (attrName === 'class') {
                                    openTag.push(` class="`, (dynamicClassBinding = createCallExpression(context.helper(SSR_RENDER_CLASS), [value])), `"`);
                                }
                                else if (attrName === 'style') {
                                    if (dynamicStyleBinding) {
                                        // already has style binding, merge into it.
                                        mergeCall(dynamicStyleBinding, value);
                                    }
                                    else {
                                        openTag.push(` style="`, (dynamicStyleBinding = createCallExpression(context.helper(SSR_RENDER_STYLE), [value])), `"`);
                                    }
                                }
                                else {
                                    attrName =
                                        node.tag.indexOf('-') > 0
                                            ? attrName // preserve raw name on custom elements
                                            : propsToAttrMap[attrName] || attrName.toLowerCase();
                                    if (isBooleanAttr(attrName)) {
                                        openTag.push(createConditionalExpression(createCallExpression(context.helper(SSR_INCLUDE_BOOLEAN_ATTR), [value]), createSimpleExpression(' ' + attrName, true), createSimpleExpression('', true), false /* no newline */));
                                    }
                                    else if (isSSRSafeAttrName(attrName)) {
                                        openTag.push(createCallExpression(context.helper(SSR_RENDER_ATTR), [
                                            key,
                                            value
                                        ]));
                                    }
                                    else {
                                        context.onError(createSSRCompilerError(61 /* X_SSR_UNSAFE_ATTR_NAME */, key.loc));
                                    }
                                }
                            }
                            else {
                                // dynamic key attr
                                // this branch is only encountered for custom directive
                                // transforms that returns properties with dynamic keys
                                const args = [key, value];
                                if (needTagForRuntime) {
                                    args.push(`"${node.tag}"`);
                                }
                                openTag.push(createCallExpression(context.helper(SSR_RENDER_DYNAMIC_ATTR), args));
                            }
                        }
                    }
                }
            }
            else {
                // special case: value on <textarea>
                if (node.tag === 'textarea' && prop.name === 'value' && prop.value) {
                    rawChildrenMap.set(node, escapeHtml(prop.value.content));
                }
                else if (!needMergeProps) {
                    if (prop.name === 'key' || prop.name === 'ref') {
                        continue;
                    }
                    // static prop
                    if (prop.name === 'class' && prop.value) {
                        staticClassBinding = JSON.stringify(prop.value.content);
                    }
                    openTag.push(` ${prop.name}` +
                        (prop.value ? `="${escapeHtml(prop.value.content)}"` : ``));
                }
            }
        }
        // handle co-existence of dynamic + static class bindings
        if (dynamicClassBinding && staticClassBinding) {
            mergeCall(dynamicClassBinding, staticClassBinding);
            removeStaticBinding(openTag, 'class');
        }
        if (context.scopeId) {
            openTag.push(` ${context.scopeId}`);
        }
        node.ssrCodegenNode = createTemplateLiteral(openTag);
    };
};
function buildSSRProps(props, directives, context) {
    let mergePropsArgs = [];
    if (props) {
        if (props.type === 14 /* JS_CALL_EXPRESSION */) {
            // already a mergeProps call
            mergePropsArgs = props.arguments;
        }
        else {
            mergePropsArgs.push(props);
        }
    }
    if (directives.length) {
        for (const dir of directives) {
            mergePropsArgs.push(createCallExpression(context.helper(SSR_GET_DIRECTIVE_PROPS), [
                `_ctx`,
                ...buildDirectiveArgs(dir, context).elements
            ]));
        }
    }
    return mergePropsArgs.length > 1
        ? createCallExpression(context.helper(MERGE_PROPS), mergePropsArgs)
        : mergePropsArgs[0];
}
function isTrueFalseValue(prop) {
    if (prop.type === 7 /* DIRECTIVE */) {
        return (prop.name === 'bind' &&
            prop.arg &&
            isStaticExp(prop.arg) &&
            (prop.arg.content === 'true-value' || prop.arg.content === 'false-value'));
    }
    else {
        return prop.name === 'true-value' || prop.name === 'false-value';
    }
}
function isTextareaWithValue(node, prop) {
    return !!(node.tag === 'textarea' &&
        prop.name === 'bind' &&
        isStaticArgOf(prop.arg, 'value'));
}
function mergeCall(call, arg) {
    const existing = call.arguments[0];
    if (existing.type === 17 /* JS_ARRAY_EXPRESSION */) {
        existing.elements.push(arg);
    }
    else {
        call.arguments[0] = createArrayExpression([existing, arg]);
    }
}
function removeStaticBinding(tag, binding) {
    const regExp = new RegExp(`^ ${binding}=".+"$`);
    const i = tag.findIndex(e => typeof e === 'string' && regExp.test(e));
    if (i > -1) {
        tag.splice(i, 1);
    }
}
function findVModel(node) {
    return node.props.find(p => p.type === 7 /* DIRECTIVE */ && p.name === 'model' && p.exp);
}
function ssrProcessElement(node, context) {
    const isVoidTag = context.options.isVoidTag || NO;
    const elementsToAdd = node.ssrCodegenNode.elements;
    for (let j = 0; j < elementsToAdd.length; j++) {
        context.pushStringPart(elementsToAdd[j]);
    }
    // Handle slot scopeId
    if (context.withSlotScopeId) {
        context.pushStringPart(createSimpleExpression(`_scopeId`, false));
    }
    // close open tag
    context.pushStringPart(`>`);
    const rawChildren = rawChildrenMap.get(node);
    if (rawChildren) {
        context.pushStringPart(rawChildren);
    }
    else if (node.children.length) {
        processChildren(node, context);
    }
    if (!isVoidTag(node.tag)) {
        // push closing tag
        context.pushStringPart(`</${node.tag}>`);
    }
}

const wipMap$1 = new WeakMap();
// phase 1: build props
function ssrTransformTransitionGroup(node, context) {
    return () => {
        const tag = findProp(node, 'tag');
        if (tag) {
            const otherProps = node.props.filter(p => p !== tag);
            const { props, directives } = buildProps(node, context, otherProps, true, /* isComponent */ false, /* isDynamicComponent */ true /* ssr (skip event listeners) */);
            let propsExp = null;
            if (props || directives.length) {
                propsExp = createCallExpression(context.helper(SSR_RENDER_ATTRS), [
                    buildSSRProps(props, directives, context)
                ]);
            }
            wipMap$1.set(node, {
                tag,
                propsExp
            });
        }
    };
}
// phase 2: process children
function ssrProcessTransitionGroup(node, context) {
    const entry = wipMap$1.get(node);
    if (entry) {
        const { tag, propsExp } = entry;
        if (tag.type === 7 /* DIRECTIVE */) {
            // dynamic :tag
            context.pushStringPart(`<`);
            context.pushStringPart(tag.exp);
            if (propsExp) {
                context.pushStringPart(propsExp);
            }
            context.pushStringPart(`>`);
            processChildren(node, context, false, 
            /**
             * TransitionGroup has the special runtime behavior of flattening and
             * concatenating all children into a single fragment (in order for them to
             * be patched using the same key map) so we need to account for that here
             * by disabling nested fragment wrappers from being generated.
             */
            true);
            context.pushStringPart(`</`);
            context.pushStringPart(tag.exp);
            context.pushStringPart(`>`);
        }
        else {
            // static tag
            context.pushStringPart(`<${tag.value.content}`);
            if (propsExp) {
                context.pushStringPart(propsExp);
            }
            context.pushStringPart(`>`);
            processChildren(node, context, false, true);
            context.pushStringPart(`</${tag.value.content}>`);
        }
    }
    else {
        // fragment
        processChildren(node, context, true, true);
    }
}

// We need to construct the slot functions in the 1st pass to ensure proper
// scope tracking, but the children of each slot cannot be processed until
// the 2nd pass, so we store the WIP slot functions in a weakMap during the 1st
// pass and complete them in the 2nd pass.
const wipMap$2 = new WeakMap();
const WIP_SLOT = Symbol();
const componentTypeMap = new WeakMap();
// ssr component transform is done in two phases:
// In phase 1. we use `buildSlot` to analyze the children of the component into
// WIP slot functions (it must be done in phase 1 because `buildSlot` relies on
// the core transform context).
// In phase 2. we convert the WIP slots from phase 1 into ssr-specific codegen
// nodes.
const ssrTransformComponent = (node, context) => {
    if (node.type !== 1 /* ELEMENT */ ||
        node.tagType !== 1 /* COMPONENT */) {
        return;
    }
    const component = resolveComponentType(node, context, true /* ssr */);
    const isDynamicComponent = isObject(component) && component.callee === RESOLVE_DYNAMIC_COMPONENT;
    componentTypeMap.set(node, component);
    if (isSymbol(component)) {
        if (component === SUSPENSE) {
            return ssrTransformSuspense(node, context);
        }
        if (component === TRANSITION_GROUP) {
            return ssrTransformTransitionGroup(node, context);
        }
        return; // other built-in components: fallthrough
    }
    // Build the fallback vnode-based branch for the component's slots.
    // We need to clone the node into a fresh copy and use the buildSlots' logic
    // to get access to the children of each slot. We then compile them with
    // a child transform pipeline using vnode-based transforms (instead of ssr-
    // based ones), and save the result branch (a ReturnStatement) in an array.
    // The branch is retrieved when processing slots again in ssr mode.
    const vnodeBranches = [];
    const clonedNode = clone(node);
    return function ssrPostTransformComponent() {
        // Using the cloned node, build the normal VNode-based branches (for
        // fallback in case the child is render-fn based). Store them in an array
        // for later use.
        if (clonedNode.children.length) {
            buildSlots(clonedNode, context, (props, children) => {
                vnodeBranches.push(createVNodeSlotBranch(props, children, context));
                return createFunctionExpression(undefined);
            });
        }
        let propsExp = `null`;
        if (node.props.length) {
            // note we are not passing ssr: true here because for components, v-on
            // handlers should still be passed
            const { props, directives } = buildProps(node, context, undefined, true, isDynamicComponent);
            if (props || directives.length) {
                propsExp = buildSSRProps(props, directives, context);
            }
        }
        const wipEntries = [];
        wipMap$2.set(node, wipEntries);
        const buildSSRSlotFn = (props, children, loc) => {
            const fn = createFunctionExpression([props || `_`, `_push`, `_parent`, `_scopeId`], undefined, // no return, assign body later
            true, // newline
            true, // isSlot
            loc);
            wipEntries.push({
                type: WIP_SLOT,
                fn,
                children,
                // also collect the corresponding vnode branch built earlier
                vnodeBranch: vnodeBranches[wipEntries.length]
            });
            return fn;
        };
        const slots = node.children.length
            ? buildSlots(node, context, buildSSRSlotFn).slots
            : `null`;
        if (typeof component !== 'string') {
            // dynamic component that resolved to a `resolveDynamicComponent` call
            // expression - since the resolved result may be a plain element (string)
            // or a VNode, handle it with `renderVNode`.
            node.ssrCodegenNode = createCallExpression(context.helper(SSR_RENDER_VNODE), [
                `_push`,
                createCallExpression(context.helper(CREATE_VNODE), [
                    component,
                    propsExp,
                    slots
                ]),
                `_parent`
            ]);
        }
        else {
            node.ssrCodegenNode = createCallExpression(context.helper(SSR_RENDER_COMPONENT), [component, propsExp, slots, `_parent`]);
        }
    };
};
function ssrProcessComponent(node, context, parent) {
    const component = componentTypeMap.get(node);
    if (!node.ssrCodegenNode) {
        // this is a built-in component that fell-through.
        if (component === TELEPORT) {
            return ssrProcessTeleport(node, context);
        }
        else if (component === SUSPENSE) {
            return ssrProcessSuspense(node, context);
        }
        else if (component === TRANSITION_GROUP) {
            return ssrProcessTransitionGroup(node, context);
        }
        else {
            // real fall-through: Transition / KeepAlive
            // just render its children.
            // #5352: if is at root level of a slot, push an empty string.
            // this does not affect the final output, but avoids all-comment slot
            // content of being treated as empty by ssrRenderSlot().
            if (parent.type === WIP_SLOT) {
                context.pushStringPart(``);
            }
            // #5351: filter out comment children inside transition
            if (component === TRANSITION) {
                node.children = node.children.filter(c => c.type !== 3 /* COMMENT */);
            }
            processChildren(node, context);
        }
    }
    else {
        // finish up slot function expressions from the 1st pass.
        const wipEntries = wipMap$2.get(node) || [];
        for (let i = 0; i < wipEntries.length; i++) {
            const { fn, vnodeBranch } = wipEntries[i];
            // For each slot, we generate two branches: one SSR-optimized branch and
            // one normal vnode-based branch. The branches are taken based on the
            // presence of the 2nd `_push` argument (which is only present if the slot
            // is called by `_ssrRenderSlot`.
            fn.body = createIfStatement(createSimpleExpression(`_push`, false), processChildrenAsStatement(wipEntries[i], context, false, true /* withSlotScopeId */), vnodeBranch);
        }
        // component is inside a slot, inherit slot scope Id
        if (context.withSlotScopeId) {
            node.ssrCodegenNode.arguments.push(`_scopeId`);
        }
        if (typeof component === 'string') {
            // static component
            context.pushStatement(createCallExpression(`_push`, [node.ssrCodegenNode]));
        }
        else {
            // dynamic component (`resolveDynamicComponent` call)
            // the codegen node is a `renderVNode` call
            context.pushStatement(node.ssrCodegenNode);
        }
    }
}
const rawOptionsMap = new WeakMap();
const [baseNodeTransforms, baseDirectiveTransforms] = getBaseTransformPreset(true);
const vnodeNodeTransforms = [...baseNodeTransforms, ...DOMNodeTransforms];
const vnodeDirectiveTransforms = Object.assign(Object.assign({}, baseDirectiveTransforms), DOMDirectiveTransforms);
function createVNodeSlotBranch(props, children, parentContext) {
    // apply a sub-transform using vnode-based transforms.
    const rawOptions = rawOptionsMap.get(parentContext.root);
    const subOptions = Object.assign(Object.assign({}, rawOptions), { 
        // overwrite with vnode-based transforms
        nodeTransforms: [
            ...vnodeNodeTransforms,
            ...(rawOptions.nodeTransforms || [])
        ], directiveTransforms: Object.assign(Object.assign({}, vnodeDirectiveTransforms), (rawOptions.directiveTransforms || {})) });
    // wrap the children with a wrapper template for proper children treatment.
    const wrapperNode = {
        type: 1 /* ELEMENT */,
        ns: 0 /* HTML */,
        tag: 'template',
        tagType: 3 /* TEMPLATE */,
        isSelfClosing: false,
        // important: provide v-slot="props" on the wrapper for proper
        // scope analysis
        props: [
            {
                type: 7 /* DIRECTIVE */,
                name: 'slot',
                exp: props,
                arg: undefined,
                modifiers: [],
                loc: locStub
            }
        ],
        children,
        loc: locStub,
        codegenNode: undefined
    };
    subTransform(wrapperNode, subOptions, parentContext);
    return createReturnStatement(children);
}
function subTransform(node, options, parentContext) {
    const childRoot = createRoot([node]);
    const childContext = createTransformContext(childRoot, options);
    // this sub transform is for vnode fallback branch so it should be handled
    // like normal render functions
    childContext.ssr = false;
    // inherit parent scope analysis state
    childContext.scopes = Object.assign({}, parentContext.scopes);
    childContext.identifiers = Object.assign({}, parentContext.identifiers);
    childContext.imports = parentContext.imports;
    // traverse
    traverseNode(childRoot, childContext);
    ['helpers', 'components', 'directives'].forEach(key => {
        childContext[key].forEach((value, helperKey) => {
            if (key === 'helpers') {
                const parentCount = parentContext.helpers.get(helperKey);
                if (parentCount === undefined) {
                    parentContext.helpers.set(helperKey, value);
                }
                else {
                    parentContext.helpers.set(helperKey, value + parentCount);
                }
            }
            else {
                parentContext[key].add(value);
            }
        });
    });
    // imports/hoists are not merged because:
    // - imports are only used for asset urls and should be consistent between
    //   node/client branches
    // - hoists are not enabled for the client branch here
}
function clone(v) {
    if (isArray(v)) {
        return v.map(clone);
    }
    else if (isObject(v)) {
        const res = {};
        for (const key in v) {
            res[key] = clone(v[key]);
        }
        return res;
    }
    else {
        return v;
    }
}

// Because SSR codegen output is completely different from client-side output
// (e.g. multiple elements can be concatenated into a single template literal
// instead of each getting a corresponding call), we need to apply an extra
// transform pass to convert the template AST into a fresh JS AST before
// passing it to codegen.
function ssrCodegenTransform(ast, options) {
    const context = createSSRTransformContext(ast, options);
    // inject SFC <style> CSS variables
    // we do this instead of inlining the expression to ensure the vars are
    // only resolved once per render
    if (options.ssrCssVars) {
        const varsExp = processExpression(createSimpleExpression(options.ssrCssVars, false), createTransformContext(createRoot([]), options));
        context.body.push(createCompoundExpression([`const _cssVars = { style: `, varsExp, `}`]));
    }
    const isFragment = ast.children.length > 1 && ast.children.some(c => !isText(c));
    processChildren(ast, context, isFragment);
    ast.codegenNode = createBlockStatement(context.body);
    // Finalize helpers.
    // We need to separate helpers imported from 'vue' vs. '@vue/server-renderer'
    ast.ssrHelpers = Array.from(new Set([...ast.helpers.filter(h => h in ssrHelpers), ...context.helpers]));
    ast.helpers = ast.helpers.filter(h => !(h in ssrHelpers));
}
function createSSRTransformContext(root, options, helpers = new Set(), withSlotScopeId = false) {
    const body = [];
    let currentString = null;
    return {
        root,
        options,
        body,
        helpers,
        withSlotScopeId,
        onError: options.onError ||
            (e => {
                throw e;
            }),
        helper(name) {
            helpers.add(name);
            return name;
        },
        pushStringPart(part) {
            if (!currentString) {
                const currentCall = createCallExpression(`_push`);
                body.push(currentCall);
                currentString = createTemplateLiteral([]);
                currentCall.arguments.push(currentString);
            }
            const bufferedElements = currentString.elements;
            const lastItem = bufferedElements[bufferedElements.length - 1];
            if (isString(part) && isString(lastItem)) {
                bufferedElements[bufferedElements.length - 1] += part;
            }
            else {
                bufferedElements.push(part);
            }
        },
        pushStatement(statement) {
            // close current string
            currentString = null;
            body.push(statement);
        }
    };
}
function createChildContext(parent, withSlotScopeId = parent.withSlotScopeId) {
    // ensure child inherits parent helpers
    return createSSRTransformContext(parent.root, parent.options, parent.helpers, withSlotScopeId);
}
function processChildren(parent, context, asFragment = false, disableNestedFragments = false) {
    if (asFragment) {
        context.pushStringPart(`<!--[-->`);
    }
    const { children } = parent;
    for (let i = 0; i < children.length; i++) {
        const child = children[i];
        switch (child.type) {
            case 1 /* ELEMENT */:
                switch (child.tagType) {
                    case 0 /* ELEMENT */:
                        ssrProcessElement(child, context);
                        break;
                    case 1 /* COMPONENT */:
                        ssrProcessComponent(child, context, parent);
                        break;
                    case 2 /* SLOT */:
                        ssrProcessSlotOutlet(child, context);
                        break;
                    case 3 /* TEMPLATE */:
                        // TODO
                        break;
                    default:
                        context.onError(createSSRCompilerError(63 /* X_SSR_INVALID_AST_NODE */, child.loc));
                        // make sure we exhaust all possible types
                        const exhaustiveCheck = child;
                        return exhaustiveCheck;
                }
                break;
            case 2 /* TEXT */:
                context.pushStringPart(escapeHtml(child.content));
                break;
            case 3 /* COMMENT */:
                // no need to escape comment here because the AST can only
                // contain valid comments.
                context.pushStringPart(`<!--${child.content}-->`);
                break;
            case 5 /* INTERPOLATION */:
                context.pushStringPart(createCallExpression(context.helper(SSR_INTERPOLATE), [child.content]));
                break;
            case 9 /* IF */:
                ssrProcessIf(child, context, disableNestedFragments);
                break;
            case 11 /* FOR */:
                ssrProcessFor(child, context, disableNestedFragments);
                break;
            case 10 /* IF_BRANCH */:
                // no-op - handled by ssrProcessIf
                break;
            case 12 /* TEXT_CALL */:
            case 8 /* COMPOUND_EXPRESSION */:
                // no-op - these two types can never appear as template child node since
                // `transformText` is not used during SSR compile.
                break;
            default:
                context.onError(createSSRCompilerError(63 /* X_SSR_INVALID_AST_NODE */, child.loc));
                // make sure we exhaust all possible types
                const exhaustiveCheck = child;
                return exhaustiveCheck;
        }
    }
    if (asFragment) {
        context.pushStringPart(`<!--]-->`);
    }
}
function processChildrenAsStatement(parent, parentContext, asFragment = false, withSlotScopeId = parentContext.withSlotScopeId) {
    const childContext = createChildContext(parentContext, withSlotScopeId);
    processChildren(parent, childContext, asFragment);
    return createBlockStatement(childContext.body);
}

const ssrTransformModel = (dir, node, context) => {
    const model = dir.exp;
    function checkDuplicatedValue() {
        const value = findProp(node, 'value');
        if (value) {
            context.onError(createDOMCompilerError(57 /* X_V_MODEL_UNNECESSARY_VALUE */, value.loc));
        }
    }
    if (node.tagType === 0 /* ELEMENT */) {
        const res = { props: [] };
        const defaultProps = [
            // default value binding for text type inputs
            createObjectProperty(`value`, model)
        ];
        if (node.tag === 'input') {
            const type = findProp(node, 'type');
            if (type) {
                const value = findValueBinding(node);
                if (type.type === 7 /* DIRECTIVE */) {
                    // dynamic type
                    res.ssrTagParts = [
                        createCallExpression(context.helper(SSR_RENDER_DYNAMIC_MODEL), [
                            type.exp,
                            model,
                            value
                        ])
                    ];
                }
                else if (type.value) {
                    // static type
                    switch (type.value.content) {
                        case 'radio':
                            res.props = [
                                createObjectProperty(`checked`, createCallExpression(context.helper(SSR_LOOSE_EQUAL), [
                                    model,
                                    value
                                ]))
                            ];
                            break;
                        case 'checkbox':
                            const trueValueBinding = findProp(node, 'true-value');
                            if (trueValueBinding) {
                                const trueValue = trueValueBinding.type === 6 /* ATTRIBUTE */
                                    ? JSON.stringify(trueValueBinding.value.content)
                                    : trueValueBinding.exp;
                                res.props = [
                                    createObjectProperty(`checked`, createCallExpression(context.helper(SSR_LOOSE_EQUAL), [
                                        model,
                                        trueValue
                                    ]))
                                ];
                            }
                            else {
                                res.props = [
                                    createObjectProperty(`checked`, createConditionalExpression(createCallExpression(`Array.isArray`, [model]), createCallExpression(context.helper(SSR_LOOSE_CONTAIN), [
                                        model,
                                        value
                                    ]), model))
                                ];
                            }
                            break;
                        case 'file':
                            context.onError(createDOMCompilerError(56 /* X_V_MODEL_ON_FILE_INPUT_ELEMENT */, dir.loc));
                            break;
                        default:
                            checkDuplicatedValue();
                            res.props = defaultProps;
                            break;
                    }
                }
            }
            else if (hasDynamicKeyVBind(node)) ;
            else {
                // text type
                checkDuplicatedValue();
                res.props = defaultProps;
            }
        }
        else if (node.tag === 'textarea') {
            checkDuplicatedValue();
            node.children = [createInterpolation(model, model.loc)];
        }
        else if (node.tag === 'select') ;
        else {
            context.onError(createDOMCompilerError(54 /* X_V_MODEL_ON_INVALID_ELEMENT */, dir.loc));
        }
        return res;
    }
    else {
        // component v-model
        return transformModel(dir, node, context);
    }
};
function findValueBinding(node) {
    const valueBinding = findProp(node, 'value');
    return valueBinding
        ? valueBinding.type === 7 /* DIRECTIVE */
            ? valueBinding.exp
            : createSimpleExpression(valueBinding.value.content, true)
        : createSimpleExpression(`null`, false);
}

const ssrTransformShow = (dir, node, context) => {
    if (!dir.exp) {
        context.onError(createDOMCompilerError(58 /* X_V_SHOW_NO_EXPRESSION */));
    }
    return {
        props: [
            createObjectProperty(`style`, createConditionalExpression(dir.exp, createSimpleExpression(`null`, false), createObjectExpression([
                createObjectProperty(`display`, createSimpleExpression(`none`, true))
            ]), false /* no newline */))
        ]
    };
};

const filterChild = (node) => node.children.filter(n => n.type !== 3 /* COMMENT */);
const hasSingleChild = (node) => filterChild(node).length === 1;
const ssrInjectFallthroughAttrs = (node, context) => {
    // _attrs is provided as a function argument.
    // mark it as a known identifier so that it doesn't get prefixed by
    // transformExpression.
    if (node.type === 0 /* ROOT */) {
        context.identifiers._attrs = 1;
    }
    if (node.type === 1 /* ELEMENT */ &&
        node.tagType === 1 /* COMPONENT */ &&
        (isBuiltInType(node.tag, 'Transition') ||
            isBuiltInType(node.tag, 'KeepAlive'))) {
        const rootChildren = filterChild(context.root);
        if (rootChildren.length === 1 && rootChildren[0] === node) {
            if (hasSingleChild(node)) {
                injectFallthroughAttrs(node.children[0]);
            }
            return;
        }
    }
    const parent = context.parent;
    if (!parent || parent.type !== 0 /* ROOT */) {
        return;
    }
    if (node.type === 10 /* IF_BRANCH */ && hasSingleChild(node)) {
        // detect cases where the parent v-if is not the only root level node
        let hasEncounteredIf = false;
        for (const c of filterChild(parent)) {
            if (c.type === 9 /* IF */ ||
                (c.type === 1 /* ELEMENT */ && findDir(c, 'if'))) {
                // multiple root v-if
                if (hasEncounteredIf)
                    return;
                hasEncounteredIf = true;
            }
            else if (
            // node before v-if
            !hasEncounteredIf ||
                // non else nodes
                !(c.type === 1 /* ELEMENT */ && findDir(c, /else/, true))) {
                return;
            }
        }
        injectFallthroughAttrs(node.children[0]);
    }
    else if (hasSingleChild(parent)) {
        injectFallthroughAttrs(node);
    }
};
function injectFallthroughAttrs(node) {
    if (node.type === 1 /* ELEMENT */ &&
        (node.tagType === 0 /* ELEMENT */ ||
            node.tagType === 1 /* COMPONENT */) &&
        !findDir(node, 'for')) {
        node.props.push({
            type: 7 /* DIRECTIVE */,
            name: 'bind',
            arg: undefined,
            exp: createSimpleExpression(`_attrs`, false),
            modifiers: [],
            loc: locStub
        });
    }
}

const ssrInjectCssVars = (node, context) => {
    if (!context.ssrCssVars) {
        return;
    }
    // _cssVars is initialized once per render function
    // the code is injected in ssrCodegenTransform when creating the
    // ssr transform context
    if (node.type === 0 /* ROOT */) {
        context.identifiers._cssVars = 1;
    }
    const parent = context.parent;
    if (!parent || parent.type !== 0 /* ROOT */) {
        return;
    }
    if (node.type === 10 /* IF_BRANCH */) {
        for (const child of node.children) {
            injectCssVars(child);
        }
    }
    else {
        injectCssVars(node);
    }
};
function injectCssVars(node) {
    if (node.type === 1 /* ELEMENT */ &&
        (node.tagType === 0 /* ELEMENT */ ||
            node.tagType === 1 /* COMPONENT */) &&
        !findDir(node, 'for')) {
        if (isBuiltInType(node.tag, 'Suspense')) {
            for (const child of node.children) {
                if (child.type === 1 /* ELEMENT */ &&
                    child.tagType === 3 /* TEMPLATE */) {
                    // suspense slot
                    child.children.forEach(injectCssVars);
                }
                else {
                    injectCssVars(child);
                }
            }
        }
        else {
            node.props.push({
                type: 7 /* DIRECTIVE */,
                name: 'bind',
                arg: undefined,
                exp: createSimpleExpression(`_cssVars`, false),
                modifiers: [],
                loc: locStub
            });
        }
    }
}

function compile$1(template, options = {}) {
    options = Object.assign(Object.assign(Object.assign({}, options), parserOptions), { ssr: true, inSSR: true, scopeId: options.mode === 'function' ? null : options.scopeId, 
        // always prefix since compiler-ssr doesn't have size concern
        prefixIdentifiers: true, 
        // disable optimizations that are unnecessary for ssr
        cacheHandlers: false, hoistStatic: false });
    const ast = baseParse(template, options);
    // Save raw options for AST. This is needed when performing sub-transforms
    // on slot vnode branches.
    rawOptionsMap.set(ast, options);
    transform(ast, Object.assign(Object.assign({}, options), { hoistStatic: false, nodeTransforms: [
            ssrTransformIf,
            ssrTransformFor,
            trackVForSlotScopes,
            transformExpression,
            ssrTransformSlotOutlet,
            ssrInjectFallthroughAttrs,
            ssrInjectCssVars,
            ssrTransformElement,
            ssrTransformComponent,
            trackSlotScopes,
            transformStyle,
            ...(options.nodeTransforms || []) // user transforms
        ], directiveTransforms: Object.assign({ 
            // reusing core v-bind
            bind: transformBind, on: transformOn, 
            // model and show has dedicated SSR handling
            model: ssrTransformModel, show: ssrTransformShow, 
            // the following are ignored during SSR
            // on: noopDirectiveTransform,
            cloak: noopDirectiveTransform, once: noopDirectiveTransform, memo: noopDirectiveTransform }, (options.directiveTransforms || {}) // user transforms
        ) }));
    // traverse the template AST and convert into SSR codegen AST
    // by replacing ast.codegenNode.
    ssrCodegenTransform(ast, options);
    return generate(ast, options);
}

var CompilerSSR = /*#__PURE__*/Object.freeze({
  __proto__: null,
  compile: compile$1
});

var _polyfillNode_fs = {};

var _polyfillNode_fs$1 = /*#__PURE__*/Object.freeze({
  __proto__: null,
  'default': _polyfillNode_fs
});

var _fs = /*@__PURE__*/getAugmentedNamespace(_polyfillNode_fs$1);

var _path = /*@__PURE__*/getAugmentedNamespace(_polyfillNode_path);

var require$$0 = /*@__PURE__*/getAugmentedNamespace(_polyfillNode_util$1);

const hasWarned = {};
function warnOnce(msg) {
    const isNodeProd = typeof process !== 'undefined' && ({}).NODE_ENV === 'production';
    if (!isNodeProd && !false && !hasWarned[msg]) {
        hasWarned[msg] = true;
        warn(msg);
    }
}
function warn(msg) {
    console.warn(`\x1b[1m\x1b[33m[@vue/compiler-sfc]\x1b[0m\x1b[33m ${msg}\x1b[0m\n`);
}

function preprocess({ source, filename, preprocessOptions }, preprocessor) {
    // Consolidate exposes a callback based API, but the callback is in fact
    // called synchronously for most templating engines. In our case, we have to
    // expose a synchronous API so that it is usable in Jest transforms (which
    // have to be sync because they are applied via Node.js require hooks)
    let res = '';
    let err = null;
    preprocessor.render(source, Object.assign({ filename }, preprocessOptions), (_err, _res) => {
        if (_err)
            err = _err;
        res = _res;
    });
    if (err)
        throw err;
    return res;
}
function compileTemplate(options) {
    const { preprocessLang, preprocessCustomRequire } = options;
    if (preprocessLang &&
        !preprocessCustomRequire) {
        throw new Error(`[@vue/compiler-sfc] Template preprocessing in the browser build must ` +
            `provide the \`preprocessCustomRequire\` option to return the in-browser ` +
            `version of the preprocessor in the shape of { render(): string }.`);
    }
    const preprocessor = preprocessLang
        ? preprocessCustomRequire
            ? preprocessCustomRequire(preprocessLang)
            : undefined
                
        : false;
    if (preprocessor) {
        try {
            return doCompileTemplate(Object.assign(Object.assign({}, options), { source: preprocess(options, preprocessor) }));
        }
        catch (e) {
            return {
                code: `export default function render() {}`,
                source: options.source,
                tips: [],
                errors: [e]
            };
        }
    }
    else if (preprocessLang) {
        return {
            code: `export default function render() {}`,
            source: options.source,
            tips: [
                `Component ${options.filename} uses lang ${preprocessLang} for template. Please install the language preprocessor.`
            ],
            errors: [
                `Component ${options.filename} uses lang ${preprocessLang} for template, however it is not installed.`
            ]
        };
    }
    else {
        return doCompileTemplate(options);
    }
}
function doCompileTemplate({ filename, id, scoped, slotted, inMap, source, ssr = false, ssrCssVars, isProd = false, compiler = ssr ? CompilerSSR : CompilerDOM, compilerOptions = {}, transformAssetUrls }) {
    const errors = [];
    const warnings = [];
    let nodeTransforms = [];
    if (isObject(transformAssetUrls)) {
        const assetOptions = normalizeOptions(transformAssetUrls);
        nodeTransforms = [
            createAssetUrlTransformWithOptions(assetOptions),
            createSrcsetTransformWithOptions(assetOptions)
        ];
    }
    else if (transformAssetUrls !== false) {
        nodeTransforms = [transformAssetUrl, transformSrcset];
    }
    if (ssr && !ssrCssVars) {
        warnOnce(`compileTemplate is called with \`ssr: true\` but no ` +
            `corresponding \`cssVars\` option.\`.`);
    }
    if (!id) {
        warnOnce(`compileTemplate now requires the \`id\` option.\`.`);
        id = '';
    }
    const shortId = id.replace(/^data-v-/, '');
    const longId = `data-v-${shortId}`;
    let { code, ast, preamble, map } = compiler.compile(source, Object.assign(Object.assign({ mode: 'module', prefixIdentifiers: true, hoistStatic: true, cacheHandlers: true, ssrCssVars: ssr && ssrCssVars && ssrCssVars.length
            ? genCssVarsFromList(ssrCssVars, shortId, isProd, true)
            : '', scopeId: scoped ? longId : undefined, slotted, sourceMap: true }, compilerOptions), { nodeTransforms: nodeTransforms.concat(compilerOptions.nodeTransforms || []), filename, onError: e => errors.push(e), onWarn: w => warnings.push(w) }));
    // inMap should be the map produced by ./parse.ts which is a simple line-only
    // mapping. If it is present, we need to adjust the final map and errors to
    // reflect the original line numbers.
    if (inMap) {
        if (map) {
            map = mapLines(inMap, map);
        }
        if (errors.length) {
            patchErrors(errors, source, inMap);
        }
    }
    const tips = warnings.map(w => {
        let msg = w.message;
        if (w.loc) {
            msg += `\n${generateCodeFrame(source, w.loc.start.offset, w.loc.end.offset)}`;
        }
        return msg;
    });
    return { code, ast, preamble, source, errors, tips, map };
}
function mapLines(oldMap, newMap) {
    if (!oldMap)
        return newMap;
    if (!newMap)
        return oldMap;
    const oldMapConsumer = new SourceMapConsumer$1(oldMap);
    const newMapConsumer = new SourceMapConsumer$1(newMap);
    const mergedMapGenerator = new SourceMapGenerator$2();
    newMapConsumer.eachMapping(m => {
        if (m.originalLine == null) {
            return;
        }
        const origPosInOldMap = oldMapConsumer.originalPositionFor({
            line: m.originalLine,
            column: m.originalColumn
        });
        if (origPosInOldMap.source == null) {
            return;
        }
        mergedMapGenerator.addMapping({
            generated: {
                line: m.generatedLine,
                column: m.generatedColumn
            },
            original: {
                line: origPosInOldMap.line,
                // use current column, since the oldMap produced by @vue/compiler-sfc
                // does not
                column: m.originalColumn
            },
            source: origPosInOldMap.source,
            name: origPosInOldMap.name
        });
    });
    // source-map's type definition is incomplete
    const generator = mergedMapGenerator;
    oldMapConsumer.sources.forEach((sourceFile) => {
        generator._sources.add(sourceFile);
        const sourceContent = oldMapConsumer.sourceContentFor(sourceFile);
        if (sourceContent != null) {
            mergedMapGenerator.setSourceContent(sourceFile, sourceContent);
        }
    });
    generator._sourceRoot = oldMap.sourceRoot;
    generator._file = oldMap.file;
    return generator.toJSON();
}
function patchErrors(errors, source, inMap) {
    const originalSource = inMap.sourcesContent[0];
    const offset = originalSource.indexOf(source);
    const lineOffset = originalSource.slice(0, offset).split(/\r?\n/).length - 1;
    errors.forEach(err => {
        if (err.loc) {
            err.loc.start.line += lineOffset;
            err.loc.start.offset += offset;
            if (err.loc.end !== err.loc.start) {
                err.loc.end.line += lineOffset;
                err.loc.end.offset += offset;
            }
        }
    });
}

const defaultExportRE = /((?:^|\n|;)\s*)export(\s*)default/;
const namedDefaultExportRE = /((?:^|\n|;)\s*)export(.+)(?:as)?(\s*)default/s;
const exportDefaultClassRE = /((?:^|\n|;)\s*)export\s+default\s+class\s+([\w$]+)/;
/**
 * Utility for rewriting `export default` in a script block into a variable
 * declaration so that we can inject things into it
 */
function rewriteDefault(input, as, parserPlugins) {
    if (!hasDefaultExport(input)) {
        return input + `\nconst ${as} = {}`;
    }
    let replaced;
    const classMatch = input.match(exportDefaultClassRE);
    if (classMatch) {
        replaced =
            input.replace(exportDefaultClassRE, '$1class $2') +
                `\nconst ${as} = ${classMatch[2]}`;
    }
    else {
        replaced = input.replace(defaultExportRE, `$1const ${as} =`);
    }
    if (!hasDefaultExport(replaced)) {
        return replaced;
    }
    // if the script somehow still contains `default export`, it probably has
    // multi-line comments or template strings. fallback to a full parse.
    const s = new MagicString(input);
    const ast = parse_1(input, {
        sourceType: 'module',
        plugins: parserPlugins
    }).program.body;
    ast.forEach(node => {
        if (node.type === 'ExportDefaultDeclaration') {
            s.overwrite(node.start, node.declaration.start, `const ${as} = `);
        }
        if (node.type === 'ExportNamedDeclaration') {
            for (const specifier of node.specifiers) {
                if (specifier.type === 'ExportSpecifier' &&
                    specifier.exported.type === 'Identifier' &&
                    specifier.exported.name === 'default') {
                    if (node.source) {
                        if (specifier.local.name === 'default') {
                            const end = specifierEnd(input, specifier.local.end, node.end);
                            s.prepend(`import { default as __VUE_DEFAULT__ } from '${node.source.value}'\n`);
                            s.overwrite(specifier.start, end, ``);
                            s.append(`\nconst ${as} = __VUE_DEFAULT__`);
                            continue;
                        }
                        else {
                            const end = specifierEnd(input, specifier.exported.end, node.end);
                            s.prepend(`import { ${input.slice(specifier.local.start, specifier.local.end)} } from '${node.source.value}'\n`);
                            s.overwrite(specifier.start, end, ``);
                            s.append(`\nconst ${as} = ${specifier.local.name}`);
                            continue;
                        }
                    }
                    const end = specifierEnd(input, specifier.end, node.end);
                    s.overwrite(specifier.start, end, ``);
                    s.append(`\nconst ${as} = ${specifier.local.name}`);
                }
            }
        }
    });
    return s.toString();
}
function hasDefaultExport(input) {
    return defaultExportRE.test(input) || namedDefaultExportRE.test(input);
}
function specifierEnd(input, end, nodeEnd) {
    // export { default   , foo } ...
    let hasCommas = false;
    let oldEnd = end;
    while (end < nodeEnd) {
        if (/\s/.test(input.charAt(end))) {
            end++;
        }
        else if (input.charAt(end) === ',') {
            end++;
            hasCommas = true;
            break;
        }
        else if (input.charAt(end) === '}') {
            break;
        }
    }
    return hasCommas ? end : oldEnd;
}

const CONVERT_SYMBOL = '$';
const ESCAPE_SYMBOL = '$$';
const shorthands = ['ref', 'computed', 'shallowRef', 'toRef', 'customRef'];
const transformCheckRE = /[^\w]\$(?:\$|ref|computed|shallowRef)?\s*(\(|\<)/;
function shouldTransform(src) {
    return transformCheckRE.test(src);
}
function transform$1(src, { filename, sourceMap, parserPlugins, importHelpersFrom = 'vue' } = {}) {
    const plugins = parserPlugins || [];
    if (filename) {
        if (/\.tsx?$/.test(filename)) {
            plugins.push('typescript');
        }
        if (filename.endsWith('x')) {
            plugins.push('jsx');
        }
    }
    const ast = parse_1(src, {
        sourceType: 'module',
        plugins
    });
    const s = new MagicString(src);
    const res = transformAST(ast.program, s, 0);
    // inject helper imports
    if (res.importedHelpers.length) {
        s.prepend(`import { ${res.importedHelpers
            .map(h => `${h} as _${h}`)
            .join(', ')} } from '${importHelpersFrom}'\n`);
    }
    return Object.assign(Object.assign({}, res), { code: s.toString(), map: sourceMap
            ? s.generateMap({
                source: filename,
                hires: true,
                includeContent: true
            })
            : null });
}
function transformAST(ast, s, offset = 0, knownRefs, knownProps) {
    // TODO remove when out of experimental
    warnExperimental();
    let convertSymbol = CONVERT_SYMBOL;
    let escapeSymbol = ESCAPE_SYMBOL;
    // macro import handling
    for (const node of ast.body) {
        if (node.type === 'ImportDeclaration' &&
            node.source.value === 'vue/macros') {
            // remove macro imports
            s.remove(node.start + offset, node.end + offset);
            // check aliasing
            for (const specifier of node.specifiers) {
                if (specifier.type === 'ImportSpecifier') {
                    const imported = specifier.imported.name;
                    const local = specifier.local.name;
                    if (local !== imported) {
                        if (imported === ESCAPE_SYMBOL) {
                            escapeSymbol = local;
                        }
                        else if (imported === CONVERT_SYMBOL) {
                            convertSymbol = local;
                        }
                        else {
                            error(`macro imports for ref-creating methods do not support aliasing.`, specifier);
                        }
                    }
                }
            }
        }
    }
    const importedHelpers = new Set();
    const rootScope = {};
    const scopeStack = [rootScope];
    let currentScope = rootScope;
    let escapeScope; // inside $$()
    const excludedIds = new WeakSet();
    const parentStack = [];
    const propsLocalToPublicMap = Object.create(null);
    if (knownRefs) {
        for (const key of knownRefs) {
            rootScope[key] = true;
        }
    }
    if (knownProps) {
        for (const key in knownProps) {
            const { local } = knownProps[key];
            rootScope[local] = 'prop';
            propsLocalToPublicMap[local] = key;
        }
    }
    function isRefCreationCall(callee) {
        if (callee === convertSymbol) {
            return convertSymbol;
        }
        if (callee[0] === '$' && shorthands.includes(callee.slice(1))) {
            return callee;
        }
        return false;
    }
    function error(msg, node) {
        const e = new Error(msg);
        e.node = node;
        throw e;
    }
    function helper(msg) {
        importedHelpers.add(msg);
        return `_${msg}`;
    }
    function registerBinding(id, isRef = false) {
        excludedIds.add(id);
        if (currentScope) {
            currentScope[id.name] = isRef;
        }
        else {
            error('registerBinding called without active scope, something is wrong.', id);
        }
    }
    const registerRefBinding = (id) => registerBinding(id, true);
    let tempVarCount = 0;
    function genTempVar() {
        return `__$temp_${++tempVarCount}`;
    }
    function snip(node) {
        return s.original.slice(node.start + offset, node.end + offset);
    }
    function walkScope(node, isRoot = false) {
        for (const stmt of node.body) {
            if (stmt.type === 'VariableDeclaration') {
                walkVariableDeclaration(stmt, isRoot);
            }
            else if (stmt.type === 'FunctionDeclaration' ||
                stmt.type === 'ClassDeclaration') {
                if (stmt.declare || !stmt.id)
                    continue;
                registerBinding(stmt.id);
            }
            else if ((stmt.type === 'ForOfStatement' || stmt.type === 'ForInStatement') &&
                stmt.left.type === 'VariableDeclaration') {
                walkVariableDeclaration(stmt.left);
            }
            else if (stmt.type === 'ExportNamedDeclaration' &&
                stmt.declaration &&
                stmt.declaration.type === 'VariableDeclaration') {
                walkVariableDeclaration(stmt.declaration, isRoot);
            }
            else if (stmt.type === 'LabeledStatement' &&
                stmt.body.type === 'VariableDeclaration') {
                walkVariableDeclaration(stmt.body, isRoot);
            }
        }
    }
    function walkVariableDeclaration(stmt, isRoot = false) {
        if (stmt.declare) {
            return;
        }
        for (const decl of stmt.declarations) {
            let refCall;
            const isCall = decl.init &&
                decl.init.type === 'CallExpression' &&
                decl.init.callee.type === 'Identifier';
            if (isCall &&
                (refCall = isRefCreationCall(decl.init.callee.name))) {
                processRefDeclaration(refCall, decl.id, decl.init);
            }
            else {
                const isProps = isRoot && isCall && decl.init.callee.name === 'defineProps';
                for (const id of extractIdentifiers(decl.id)) {
                    if (isProps) {
                        // for defineProps destructure, only exclude them since they
                        // are already passed in as knownProps
                        excludedIds.add(id);
                    }
                    else {
                        registerBinding(id);
                    }
                }
            }
        }
    }
    function processRefDeclaration(method, id, call) {
        excludedIds.add(call.callee);
        if (method === convertSymbol) {
            // $
            // remove macro
            s.remove(call.callee.start + offset, call.callee.end + offset);
            if (id.type === 'Identifier') {
                // single variable
                registerRefBinding(id);
            }
            else if (id.type === 'ObjectPattern') {
                processRefObjectPattern(id, call);
            }
            else if (id.type === 'ArrayPattern') {
                processRefArrayPattern(id, call);
            }
        }
        else {
            // shorthands
            if (id.type === 'Identifier') {
                registerRefBinding(id);
                // replace call
                s.overwrite(call.start + offset, call.start + method.length + offset, helper(method.slice(1)));
            }
            else {
                error(`${method}() cannot be used with destructure patterns.`, call);
            }
        }
    }
    function processRefObjectPattern(pattern, call, tempVar, path = []) {
        if (!tempVar) {
            tempVar = genTempVar();
            // const { x } = $(useFoo()) --> const __$temp_1 = useFoo()
            s.overwrite(pattern.start + offset, pattern.end + offset, tempVar);
        }
        for (const p of pattern.properties) {
            let nameId;
            let key;
            let defaultValue;
            if (p.type === 'ObjectProperty') {
                if (p.key.start === p.value.start) {
                    // shorthand { foo }
                    nameId = p.key;
                    if (p.value.type === 'Identifier') {
                        // avoid shorthand value identifier from being processed
                        excludedIds.add(p.value);
                    }
                    else if (p.value.type === 'AssignmentPattern' &&
                        p.value.left.type === 'Identifier') {
                        // { foo = 1 }
                        excludedIds.add(p.value.left);
                        defaultValue = p.value.right;
                    }
                }
                else {
                    key = p.computed ? p.key : p.key.name;
                    if (p.value.type === 'Identifier') {
                        // { foo: bar }
                        nameId = p.value;
                    }
                    else if (p.value.type === 'ObjectPattern') {
                        processRefObjectPattern(p.value, call, tempVar, [...path, key]);
                    }
                    else if (p.value.type === 'ArrayPattern') {
                        processRefArrayPattern(p.value, call, tempVar, [...path, key]);
                    }
                    else if (p.value.type === 'AssignmentPattern') {
                        if (p.value.left.type === 'Identifier') {
                            // { foo: bar = 1 }
                            nameId = p.value.left;
                            defaultValue = p.value.right;
                        }
                        else if (p.value.left.type === 'ObjectPattern') {
                            processRefObjectPattern(p.value.left, call, tempVar, [
                                ...path,
                                [key, p.value.right]
                            ]);
                        }
                        else if (p.value.left.type === 'ArrayPattern') {
                            processRefArrayPattern(p.value.left, call, tempVar, [
                                ...path,
                                [key, p.value.right]
                            ]);
                        }
                        else ;
                    }
                }
            }
            else {
                // rest element { ...foo }
                error(`reactivity destructure does not support rest elements.`, p);
            }
            if (nameId) {
                registerRefBinding(nameId);
                // inject toRef() after original replaced pattern
                const source = pathToString(tempVar, path);
                const keyStr = isString(key)
                    ? `'${key}'`
                    : key
                        ? snip(key)
                        : `'${nameId.name}'`;
                const defaultStr = defaultValue ? `, ${snip(defaultValue)}` : ``;
                s.appendLeft(call.end + offset, `,\n  ${nameId.name} = ${helper('toRef')}(${source}, ${keyStr}${defaultStr})`);
            }
        }
    }
    function processRefArrayPattern(pattern, call, tempVar, path = []) {
        if (!tempVar) {
            // const [x] = $(useFoo()) --> const __$temp_1 = useFoo()
            tempVar = genTempVar();
            s.overwrite(pattern.start + offset, pattern.end + offset, tempVar);
        }
        for (let i = 0; i < pattern.elements.length; i++) {
            const e = pattern.elements[i];
            if (!e)
                continue;
            let nameId;
            let defaultValue;
            if (e.type === 'Identifier') {
                // [a] --> [__a]
                nameId = e;
            }
            else if (e.type === 'AssignmentPattern') {
                // [a = 1]
                nameId = e.left;
                defaultValue = e.right;
            }
            else if (e.type === 'RestElement') {
                // [...a]
                error(`reactivity destructure does not support rest elements.`, e);
            }
            else if (e.type === 'ObjectPattern') {
                processRefObjectPattern(e, call, tempVar, [...path, i]);
            }
            else if (e.type === 'ArrayPattern') {
                processRefArrayPattern(e, call, tempVar, [...path, i]);
            }
            if (nameId) {
                registerRefBinding(nameId);
                // inject toRef() after original replaced pattern
                const source = pathToString(tempVar, path);
                const defaultStr = defaultValue ? `, ${snip(defaultValue)}` : ``;
                s.appendLeft(call.end + offset, `,\n  ${nameId.name} = ${helper('toRef')}(${source}, ${i}${defaultStr})`);
            }
        }
    }
    function pathToString(source, path) {
        if (path.length) {
            for (const seg of path) {
                if (isArray(seg)) {
                    source = `(${source}${segToString(seg[0])} || ${snip(seg[1])})`;
                }
                else {
                    source += segToString(seg);
                }
            }
        }
        return source;
    }
    function segToString(seg) {
        if (typeof seg === 'number') {
            return `[${seg}]`;
        }
        else if (typeof seg === 'string') {
            return `.${seg}`;
        }
        else {
            return snip(seg);
        }
    }
    function rewriteId(scope, id, parent, parentStack) {
        if (hasOwn(scope, id.name)) {
            const bindingType = scope[id.name];
            if (bindingType) {
                const isProp = bindingType === 'prop';
                if (isStaticProperty(parent) && parent.shorthand) {
                    // let binding used in a property shorthand
                    // skip for destructure patterns
                    if (!parent.inPattern ||
                        isInDestructureAssignment(parent, parentStack)) {
                        if (isProp) {
                            if (escapeScope) {
                                // prop binding in $$()
                                // { prop } -> { prop: __props_prop }
                                registerEscapedPropBinding(id);
                                s.appendLeft(id.end + offset, `: __props_${propsLocalToPublicMap[id.name]}`);
                            }
                            else {
                                // { prop } -> { prop: __props.prop }
                                s.appendLeft(id.end + offset, `: ${genPropsAccessExp(propsLocalToPublicMap[id.name])}`);
                            }
                        }
                        else {
                            // { foo } -> { foo: foo.value }
                            s.appendLeft(id.end + offset, `: ${id.name}.value`);
                        }
                    }
                }
                else {
                    if (isProp) {
                        if (escapeScope) {
                            // x --> __props_x
                            registerEscapedPropBinding(id);
                            s.overwrite(id.start + offset, id.end + offset, `__props_${propsLocalToPublicMap[id.name]}`);
                        }
                        else {
                            // x --> __props.x
                            s.overwrite(id.start + offset, id.end + offset, genPropsAccessExp(propsLocalToPublicMap[id.name]));
                        }
                    }
                    else {
                        // x --> x.value
                        s.appendLeft(id.end + offset, '.value');
                    }
                }
            }
            return true;
        }
        return false;
    }
    const propBindingRefs = {};
    function registerEscapedPropBinding(id) {
        if (!propBindingRefs.hasOwnProperty(id.name)) {
            propBindingRefs[id.name] = true;
            const publicKey = propsLocalToPublicMap[id.name];
            s.prependRight(offset, `const __props_${publicKey} = ${helper(`toRef`)}(__props, '${publicKey}')\n`);
        }
    }
    // check root scope first
    walkScope(ast, true);
    walk$1(ast, {
        enter(node, parent) {
            parent && parentStack.push(parent);
            // function scopes
            if (isFunctionType(node)) {
                scopeStack.push((currentScope = {}));
                walkFunctionParams(node, registerBinding);
                if (node.body.type === 'BlockStatement') {
                    walkScope(node.body);
                }
                return;
            }
            // catch param
            if (node.type === 'CatchClause') {
                scopeStack.push((currentScope = {}));
                if (node.param && node.param.type === 'Identifier') {
                    registerBinding(node.param);
                }
                walkScope(node.body);
                return;
            }
            // non-function block scopes
            if (node.type === 'BlockStatement' && !isFunctionType(parent)) {
                scopeStack.push((currentScope = {}));
                walkScope(node);
                return;
            }
            // skip type nodes
            if (parent &&
                parent.type.startsWith('TS') &&
                parent.type !== 'TSAsExpression' &&
                parent.type !== 'TSNonNullExpression' &&
                parent.type !== 'TSTypeAssertion') {
                return this.skip();
            }
            if (node.type === 'Identifier' &&
                // if inside $$(), skip unless this is a destructured prop binding
                !(escapeScope && rootScope[node.name] !== 'prop') &&
                isReferencedIdentifier(node, parent, parentStack) &&
                !excludedIds.has(node)) {
                // walk up the scope chain to check if id should be appended .value
                let i = scopeStack.length;
                while (i--) {
                    if (rewriteId(scopeStack[i], node, parent, parentStack)) {
                        return;
                    }
                }
            }
            if (node.type === 'CallExpression' && node.callee.type === 'Identifier') {
                const callee = node.callee.name;
                const refCall = isRefCreationCall(callee);
                if (refCall && (!parent || parent.type !== 'VariableDeclarator')) {
                    return error(`${refCall} can only be used as the initializer of ` +
                        `a variable declaration.`, node);
                }
                if (callee === escapeSymbol) {
                    s.remove(node.callee.start + offset, node.callee.end + offset);
                    escapeScope = node;
                }
                // TODO remove when out of experimental
                if (callee === '$raw') {
                    error(`$raw() has been replaced by $$(). ` +
                        `See ${RFC_LINK} for latest updates.`, node);
                }
                if (callee === '$fromRef') {
                    error(`$fromRef() has been replaced by $(). ` +
                        `See ${RFC_LINK} for latest updates.`, node);
                }
            }
        },
        leave(node, parent) {
            parent && parentStack.pop();
            if ((node.type === 'BlockStatement' && !isFunctionType(parent)) ||
                isFunctionType(node)) {
                scopeStack.pop();
                currentScope = scopeStack[scopeStack.length - 1] || null;
            }
            if (node === escapeScope) {
                escapeScope = undefined;
            }
        }
    });
    return {
        rootRefs: Object.keys(rootScope).filter(key => rootScope[key] === true),
        importedHelpers: [...importedHelpers]
    };
}
const RFC_LINK = `https://github.com/vuejs/rfcs/discussions/369`;
const hasWarned$1 = {};
function warnExperimental() {
    // eslint-disable-next-line
    if (typeof window !== 'undefined') {
        return;
    }
    warnOnce$1(`Reactivity transform is an experimental feature.\n` +
        `Experimental features may change behavior between patch versions.\n` +
        `It is recommended to pin your vue dependencies to exact versions to avoid breakage.\n` +
        `You can follow the proposal's status at ${RFC_LINK}.`);
}
function warnOnce$1(msg) {
    const isNodeProd = typeof process !== 'undefined' && ({}).NODE_ENV === 'production';
    if (!isNodeProd && !false && !hasWarned$1[msg]) {
        hasWarned$1[msg] = true;
        warn$1(msg);
    }
}
function warn$1(msg) {
    console.warn(`\x1b[1m\x1b[33m[@vue/reactivity-transform]\x1b[0m\x1b[33m ${msg}\x1b[0m\n`);
}

// Special compiler macros
const DEFINE_PROPS = 'defineProps';
const DEFINE_EMITS = 'defineEmits';
const DEFINE_EXPOSE = 'defineExpose';
const WITH_DEFAULTS = 'withDefaults';
// constants
const DEFAULT_VAR = `__default__`;
const isBuiltInDir = makeMap(`once,memo,if,for,else,else-if,slot,text,html,on,bind,model,show,cloak,is`);
/**
 * Compile `<script setup>`
 * It requires the whole SFC descriptor because we need to handle and merge
 * normal `<script>` + `<script setup>` if both are present.
 */
function compileScript(sfc, options) {
    var _a;
    let { script, scriptSetup, source, filename } = sfc;
    // feature flags
    // TODO remove support for deprecated options when out of experimental
    const enableReactivityTransform = !!options.reactivityTransform ||
        !!options.refSugar ||
        !!options.refTransform;
    const enablePropsTransform = !!options.reactivityTransform || !!options.propsDestructureTransform;
    const isProd = !!options.isProd;
    const genSourceMap = options.sourceMap !== false;
    let refBindings;
    if (!options.id) {
        warnOnce(`compileScript now requires passing the \`id\` option.\n` +
            `Upgrade your vite or vue-loader version for compatibility with ` +
            `the latest experimental proposals.`);
    }
    const scopeId = options.id ? options.id.replace(/^data-v-/, '') : '';
    const cssVars = sfc.cssVars;
    const scriptLang = script && script.lang;
    const scriptSetupLang = scriptSetup && scriptSetup.lang;
    const isTS = scriptLang === 'ts' ||
        scriptLang === 'tsx' ||
        scriptSetupLang === 'ts' ||
        scriptSetupLang === 'tsx';
    // resolve parser plugins
    const plugins = [];
    if (!isTS || scriptLang === 'tsx' || scriptSetupLang === 'tsx') {
        plugins.push('jsx');
    }
    else {
        // If don't match the case of adding jsx, should remove the jsx from the babelParserPlugins
        if (options.babelParserPlugins)
            options.babelParserPlugins = options.babelParserPlugins.filter(n => n !== 'jsx');
    }
    if (options.babelParserPlugins)
        plugins.push(...options.babelParserPlugins);
    if (isTS)
        plugins.push('typescript', 'decorators-legacy');
    if (!scriptSetup) {
        if (!script) {
            throw new Error(`[@vue/compiler-sfc] SFC contains no <script> tags.`);
        }
        if (scriptLang && !isTS && scriptLang !== 'jsx') {
            // do not process non js/ts script blocks
            return script;
        }
        try {
            let content = script.content;
            let map = script.map;
            const scriptAst = parse_1(content, {
                plugins,
                sourceType: 'module'
            }).program;
            const bindings = analyzeScriptBindings(scriptAst.body);
            if (enableReactivityTransform && shouldTransform(content)) {
                const s = new MagicString(source);
                const startOffset = script.loc.start.offset;
                const endOffset = script.loc.end.offset;
                const { importedHelpers } = transformAST(scriptAst, s, startOffset);
                if (importedHelpers.length) {
                    s.prepend(`import { ${importedHelpers
                        .map(h => `${h} as _${h}`)
                        .join(', ')} } from 'vue'\n`);
                }
                s.remove(0, startOffset);
                s.remove(endOffset, source.length);
                content = s.toString();
                if (genSourceMap) {
                    map = s.generateMap({
                        source: filename,
                        hires: true,
                        includeContent: true
                    });
                }
            }
            if (cssVars.length) {
                content = rewriteDefault(content, DEFAULT_VAR, plugins);
                content += genNormalScriptCssVarsCode(cssVars, bindings, scopeId, isProd);
                content += `\nexport default ${DEFAULT_VAR}`;
            }
            return Object.assign(Object.assign({}, script), { content,
                map,
                bindings, scriptAst: scriptAst.body });
        }
        catch (e) {
            // silently fallback if parse fails since user may be using custom
            // babel syntax
            return script;
        }
    }
    if (script && scriptLang !== scriptSetupLang) {
        throw new Error(`[@vue/compiler-sfc] <script> and <script setup> must have the same ` +
            `language type.`);
    }
    if (scriptSetupLang && !isTS && scriptSetupLang !== 'jsx') {
        // do not process non js/ts script blocks
        return scriptSetup;
    }
    // metadata that needs to be returned
    const bindingMetadata = {};
    const helperImports = new Set();
    const userImports = Object.create(null);
    const userImportAlias = Object.create(null);
    const scriptBindings = Object.create(null);
    const setupBindings = Object.create(null);
    let defaultExport;
    let hasDefinePropsCall = false;
    let hasDefineEmitCall = false;
    let hasDefineExposeCall = false;
    let hasDefaultExportName = false;
    let hasDefaultExportRender = false;
    let propsRuntimeDecl;
    let propsRuntimeDefaults;
    let propsDestructureDecl;
    let propsDestructureRestId;
    let propsTypeDecl;
    let propsTypeDeclRaw;
    let propsIdentifier;
    let emitsRuntimeDecl;
    let emitsTypeDecl;
    let emitsTypeDeclRaw;
    let emitIdentifier;
    let hasAwait = false;
    let hasInlinedSsrRenderFn = false;
    // props/emits declared via types
    const typeDeclaredProps = {};
    const typeDeclaredEmits = new Set();
    // record declared types for runtime props type generation
    const declaredTypes = {};
    // props destructure data
    const propsDestructuredBindings = Object.create(null);
    // magic-string state
    const s = new MagicString(source);
    const startOffset = scriptSetup.loc.start.offset;
    const endOffset = scriptSetup.loc.end.offset;
    const scriptStartOffset = script && script.loc.start.offset;
    const scriptEndOffset = script && script.loc.end.offset;
    function helper(key) {
        helperImports.add(key);
        return `_${key}`;
    }
    function parse(input, options, offset) {
        try {
            return parse_1(input, options).program;
        }
        catch (e) {
            e.message = `[@vue/compiler-sfc] ${e.message}\n\n${sfc.filename}\n${generateCodeFrame(source, e.pos + offset, e.pos + offset + 1)}`;
            throw e;
        }
    }
    function error(msg, node, end = node.end + startOffset) {
        throw new Error(`[@vue/compiler-sfc] ${msg}\n\n${sfc.filename}\n${generateCodeFrame(source, node.start + startOffset, end)}`);
    }
    function registerUserImport(source, local, imported, isType, isFromSetup, needTemplateUsageCheck) {
        if (source === 'vue' && imported) {
            userImportAlias[imported] = local;
        }
        // template usage check is only needed in non-inline mode, so we can skip
        // the work if inlineTemplate is true.
        let isUsedInTemplate = needTemplateUsageCheck;
        if (needTemplateUsageCheck &&
            isTS &&
            sfc.template &&
            !sfc.template.src &&
            !sfc.template.lang) {
            isUsedInTemplate = isImportUsed(local, sfc);
        }
        userImports[local] = {
            isType,
            imported: imported || 'default',
            source,
            isFromSetup,
            isUsedInTemplate
        };
    }
    function processDefineProps(node, declId) {
        if (!isCallOf(node, DEFINE_PROPS)) {
            return false;
        }
        if (hasDefinePropsCall) {
            error(`duplicate ${DEFINE_PROPS}() call`, node);
        }
        hasDefinePropsCall = true;
        propsRuntimeDecl = node.arguments[0];
        // call has type parameters - infer runtime types from it
        if (node.typeParameters) {
            if (propsRuntimeDecl) {
                error(`${DEFINE_PROPS}() cannot accept both type and non-type arguments ` +
                    `at the same time. Use one or the other.`, node);
            }
            propsTypeDeclRaw = node.typeParameters.params[0];
            propsTypeDecl = resolveQualifiedType(propsTypeDeclRaw, node => node.type === 'TSTypeLiteral');
            if (!propsTypeDecl) {
                error(`type argument passed to ${DEFINE_PROPS}() must be a literal type, ` +
                    `or a reference to an interface or literal type.`, propsTypeDeclRaw);
            }
        }
        if (declId) {
            if (enablePropsTransform && declId.type === 'ObjectPattern') {
                propsDestructureDecl = declId;
                // props destructure - handle compilation sugar
                for (const prop of declId.properties) {
                    if (prop.type === 'ObjectProperty') {
                        if (prop.computed) {
                            error(`${DEFINE_PROPS}() destructure cannot use computed key.`, prop.key);
                        }
                        const propKey = prop.key.type === 'StringLiteral'
                            ? prop.key.value
                            : prop.key.name;
                        if (prop.value.type === 'AssignmentPattern') {
                            // default value { foo = 123 }
                            const { left, right } = prop.value;
                            if (left.type !== 'Identifier') {
                                error(`${DEFINE_PROPS}() destructure does not support nested patterns.`, left);
                            }
                            // store default value
                            propsDestructuredBindings[propKey] = {
                                local: left.name,
                                default: right
                            };
                        }
                        else if (prop.value.type === 'Identifier') {
                            // simple destructure
                            propsDestructuredBindings[propKey] = {
                                local: prop.value.name
                            };
                        }
                        else {
                            error(`${DEFINE_PROPS}() destructure does not support nested patterns.`, prop.value);
                        }
                    }
                    else {
                        // rest spread
                        propsDestructureRestId = prop.argument.name;
                    }
                }
            }
            else {
                propsIdentifier = scriptSetup.content.slice(declId.start, declId.end);
            }
        }
        return true;
    }
    function processWithDefaults(node, declId) {
        if (!isCallOf(node, WITH_DEFAULTS)) {
            return false;
        }
        if (processDefineProps(node.arguments[0], declId)) {
            if (propsRuntimeDecl) {
                error(`${WITH_DEFAULTS} can only be used with type-based ` +
                    `${DEFINE_PROPS} declaration.`, node);
            }
            if (propsDestructureDecl) {
                error(`${WITH_DEFAULTS}() is unnecessary when using destructure with ${DEFINE_PROPS}().\n` +
                    `Prefer using destructure default values, e.g. const { foo = 1 } = defineProps(...).`, node.callee);
            }
            propsRuntimeDefaults = node.arguments[1];
            if (!propsRuntimeDefaults ||
                propsRuntimeDefaults.type !== 'ObjectExpression') {
                error(`The 2nd argument of ${WITH_DEFAULTS} must be an object literal.`, propsRuntimeDefaults || node);
            }
        }
        else {
            error(`${WITH_DEFAULTS}' first argument must be a ${DEFINE_PROPS} call.`, node.arguments[0] || node);
        }
        return true;
    }
    function processDefineEmits(node, declId) {
        if (!isCallOf(node, DEFINE_EMITS)) {
            return false;
        }
        if (hasDefineEmitCall) {
            error(`duplicate ${DEFINE_EMITS}() call`, node);
        }
        hasDefineEmitCall = true;
        emitsRuntimeDecl = node.arguments[0];
        if (node.typeParameters) {
            if (emitsRuntimeDecl) {
                error(`${DEFINE_EMITS}() cannot accept both type and non-type arguments ` +
                    `at the same time. Use one or the other.`, node);
            }
            emitsTypeDeclRaw = node.typeParameters.params[0];
            emitsTypeDecl = resolveQualifiedType(emitsTypeDeclRaw, node => node.type === 'TSFunctionType' || node.type === 'TSTypeLiteral');
            if (!emitsTypeDecl) {
                error(`type argument passed to ${DEFINE_EMITS}() must be a function type, ` +
                    `a literal type with call signatures, or a reference to the above types.`, emitsTypeDeclRaw);
            }
        }
        if (declId) {
            emitIdentifier = scriptSetup.content.slice(declId.start, declId.end);
        }
        return true;
    }
    function resolveQualifiedType(node, qualifier) {
        if (qualifier(node)) {
            return node;
        }
        if (node.type === 'TSTypeReference' &&
            node.typeName.type === 'Identifier') {
            const refName = node.typeName.name;
            const isQualifiedType = (node) => {
                if (node.type === 'TSInterfaceDeclaration' &&
                    node.id.name === refName) {
                    return node.body;
                }
                else if (node.type === 'TSTypeAliasDeclaration' &&
                    node.id.name === refName &&
                    qualifier(node.typeAnnotation)) {
                    return node.typeAnnotation;
                }
                else if (node.type === 'ExportNamedDeclaration' && node.declaration) {
                    return isQualifiedType(node.declaration);
                }
            };
            const body = scriptAst
                ? [...scriptSetupAst.body, ...scriptAst.body]
                : scriptSetupAst.body;
            for (const node of body) {
                const qualified = isQualifiedType(node);
                if (qualified) {
                    return qualified;
                }
            }
        }
    }
    function processDefineExpose(node) {
        if (isCallOf(node, DEFINE_EXPOSE)) {
            if (hasDefineExposeCall) {
                error(`duplicate ${DEFINE_EXPOSE}() call`, node);
            }
            hasDefineExposeCall = true;
            return true;
        }
        return false;
    }
    function checkInvalidScopeReference(node, method) {
        if (!node)
            return;
        walkIdentifiers(node, id => {
            if (setupBindings[id.name]) {
                error(`\`${method}()\` in <script setup> cannot reference locally ` +
                    `declared variables because it will be hoisted outside of the ` +
                    `setup() function. If your component options require initialization ` +
                    `in the module scope, use a separate normal <script> to export ` +
                    `the options instead.`, id);
            }
        });
    }
    /**
     * await foo()
     * -->
     * ;(
     *   ([__temp,__restore] = withAsyncContext(() => foo())),
     *   await __temp,
     *   __restore()
     * )
     *
     * const a = await foo()
     * -->
     * const a = (
     *   ([__temp, __restore] = withAsyncContext(() => foo())),
     *   __temp = await __temp,
     *   __restore(),
     *   __temp
     * )
     */
    function processAwait(node, needSemi, isStatement) {
        const argumentStart = node.argument.extra && node.argument.extra.parenthesized
            ? node.argument.extra.parenStart
            : node.argument.start;
        const argumentStr = source.slice(argumentStart + startOffset, node.argument.end + startOffset);
        const containsNestedAwait = /\bawait\b/.test(argumentStr);
        s.overwrite(node.start + startOffset, argumentStart + startOffset, `${needSemi ? `;` : ``}(\n  ([__temp,__restore] = ${helper(`withAsyncContext`)}(${containsNestedAwait ? `async ` : ``}() => `);
        s.appendLeft(node.end + startOffset, `)),\n  ${isStatement ? `` : `__temp = `}await __temp,\n  __restore()${isStatement ? `` : `,\n  __temp`}\n)`);
    }
    /**
     * check defaults. If the default object is an object literal with only
     * static properties, we can directly generate more optimized default
     * declarations. Otherwise we will have to fallback to runtime merging.
     */
    function hasStaticWithDefaults() {
        return (propsRuntimeDefaults &&
            propsRuntimeDefaults.type === 'ObjectExpression' &&
            propsRuntimeDefaults.properties.every(node => (node.type === 'ObjectProperty' && !node.computed) ||
                node.type === 'ObjectMethod'));
    }
    function genRuntimeProps(props) {
        const keys = Object.keys(props);
        if (!keys.length) {
            return ``;
        }
        const hasStaticDefaults = hasStaticWithDefaults();
        const scriptSetupSource = scriptSetup.content;
        let propsDecls = `{
    ${keys
            .map(key => {
            let defaultString;
            const destructured = genDestructuredDefaultValue(key);
            if (destructured) {
                defaultString = `default: ${destructured}`;
            }
            else if (hasStaticDefaults) {
                const prop = propsRuntimeDefaults.properties.find((node) => node.key.name === key);
                if (prop) {
                    if (prop.type === 'ObjectProperty') {
                        // prop has corresponding static default value
                        defaultString = `default: ${scriptSetupSource.slice(prop.value.start, prop.value.end)}`;
                    }
                    else {
                        defaultString = `default() ${scriptSetupSource.slice(prop.body.start, prop.body.end)}`;
                    }
                }
            }
            const { type, required } = props[key];
            if (!isProd) {
                return `${key}: { type: ${toRuntimeTypeString(type)}, required: ${required}${defaultString ? `, ${defaultString}` : ``} }`;
            }
            else if (type.some(el => el === 'Boolean' || (defaultString && el === 'Function'))) {
                // #4783 production: if boolean or defaultString and function exists, should keep the type.
                return `${key}: { type: ${toRuntimeTypeString(type)}${defaultString ? `, ${defaultString}` : ``} }`;
            }
            else {
                // production: checks are useless
                return `${key}: ${defaultString ? `{ ${defaultString} }` : 'null'}`;
            }
        })
            .join(',\n    ')}\n  }`;
        if (propsRuntimeDefaults && !hasStaticDefaults) {
            propsDecls = `${helper('mergeDefaults')}(${propsDecls}, ${source.slice(propsRuntimeDefaults.start + startOffset, propsRuntimeDefaults.end + startOffset)})`;
        }
        return `\n  props: ${propsDecls},`;
    }
    function genDestructuredDefaultValue(key) {
        const destructured = propsDestructuredBindings[key];
        if (destructured && destructured.default) {
            const value = scriptSetup.content.slice(destructured.default.start, destructured.default.end);
            const isLiteral = destructured.default.type.endsWith('Literal');
            return isLiteral ? value : `() => (${value})`;
        }
    }
    function genSetupPropsType(node) {
        const scriptSetupSource = scriptSetup.content;
        if (hasStaticWithDefaults()) {
            // if withDefaults() is used, we need to remove the optional flags
            // on props that have default values
            let res = `{ `;
            const members = node.type === 'TSTypeLiteral' ? node.members : node.body;
            for (const m of members) {
                if ((m.type === 'TSPropertySignature' ||
                    m.type === 'TSMethodSignature') &&
                    m.typeAnnotation &&
                    m.key.type === 'Identifier') {
                    if (propsRuntimeDefaults.properties.some((p) => p.key.name === m.key.name)) {
                        res +=
                            m.key.name +
                                (m.type === 'TSMethodSignature' ? '()' : '') +
                                scriptSetupSource.slice(m.typeAnnotation.start, m.typeAnnotation.end) +
                                ', ';
                    }
                    else {
                        res +=
                            scriptSetupSource.slice(m.start, m.typeAnnotation.end) + `, `;
                    }
                }
            }
            return (res.length ? res.slice(0, -2) : res) + ` }`;
        }
        else {
            return scriptSetupSource.slice(node.start, node.end);
        }
    }
    // 1. process normal <script> first if it exists
    let scriptAst;
    if (script) {
        scriptAst = parse(script.content, {
            plugins,
            sourceType: 'module'
        }, scriptStartOffset);
        for (const node of scriptAst.body) {
            if (node.type === 'ImportDeclaration') {
                // record imports for dedupe
                for (const specifier of node.specifiers) {
                    const imported = specifier.type === 'ImportSpecifier' &&
                        specifier.imported.type === 'Identifier' &&
                        specifier.imported.name;
                    registerUserImport(node.source.value, specifier.local.name, imported, node.importKind === 'type' ||
                        (specifier.type === 'ImportSpecifier' &&
                            specifier.importKind === 'type'), false, !options.inlineTemplate);
                }
            }
            else if (node.type === 'ExportDefaultDeclaration') {
                // export default
                defaultExport = node;
                // check if user has manually specified `name` or 'render` option in
                // export default
                // if has name, skip name inference
                // if has render and no template, generate return object instead of
                // empty render function (#4980)
                let optionProperties;
                if (defaultExport.declaration.type === 'ObjectExpression') {
                    optionProperties = defaultExport.declaration.properties;
                }
                else if (defaultExport.declaration.type === 'CallExpression' &&
                    defaultExport.declaration.arguments[0].type === 'ObjectExpression') {
                    optionProperties = defaultExport.declaration.arguments[0].properties;
                }
                if (optionProperties) {
                    for (const s of optionProperties) {
                        if (s.type === 'ObjectProperty' &&
                            s.key.type === 'Identifier' &&
                            s.key.name === 'name') {
                            hasDefaultExportName = true;
                        }
                        if ((s.type === 'ObjectMethod' || s.type === 'ObjectProperty') &&
                            s.key.type === 'Identifier' &&
                            s.key.name === 'render') {
                            // TODO warn when we provide a better way to do it?
                            hasDefaultExportRender = true;
                        }
                    }
                }
                // export default { ... } --> const __default__ = { ... }
                const start = node.start + scriptStartOffset;
                const end = node.declaration.start + scriptStartOffset;
                s.overwrite(start, end, `const ${DEFAULT_VAR} = `);
            }
            else if (node.type === 'ExportNamedDeclaration') {
                const defaultSpecifier = node.specifiers.find(s => s.exported.type === 'Identifier' && s.exported.name === 'default');
                if (defaultSpecifier) {
                    defaultExport = node;
                    // 1. remove specifier
                    if (node.specifiers.length > 1) {
                        s.remove(defaultSpecifier.start + scriptStartOffset, defaultSpecifier.end + scriptStartOffset);
                    }
                    else {
                        s.remove(node.start + scriptStartOffset, node.end + scriptStartOffset);
                    }
                    if (node.source) {
                        // export { x as default } from './x'
                        // rewrite to `import { x as __default__ } from './x'` and
                        // add to top
                        s.prepend(`import { ${defaultSpecifier.local.name} as ${DEFAULT_VAR} } from '${node.source.value}'\n`);
                    }
                    else {
                        // export { x as default }
                        // rewrite to `const __default__ = x` and move to end
                        s.appendLeft(scriptEndOffset, `\nconst ${DEFAULT_VAR} = ${defaultSpecifier.local.name}\n`);
                    }
                }
                if (node.declaration) {
                    walkDeclaration(node.declaration, scriptBindings, userImportAlias);
                }
            }
            else if ((node.type === 'VariableDeclaration' ||
                node.type === 'FunctionDeclaration' ||
                node.type === 'ClassDeclaration' ||
                node.type === 'TSEnumDeclaration') &&
                !node.declare) {
                walkDeclaration(node, scriptBindings, userImportAlias);
            }
        }
        // apply reactivity transform
        if (enableReactivityTransform && shouldTransform(script.content)) {
            const { rootRefs, importedHelpers } = transformAST(scriptAst, s, scriptStartOffset);
            refBindings = rootRefs;
            for (const h of importedHelpers) {
                helperImports.add(h);
            }
        }
        // <script> after <script setup>
        // we need to move the block up so that `const __default__` is
        // declared before being used in the actual component definition
        if (scriptStartOffset > startOffset) {
            // if content doesn't end with newline, add one
            if (!/\n$/.test(script.content.trim())) {
                s.appendLeft(scriptEndOffset, `\n`);
            }
            s.move(scriptStartOffset, scriptEndOffset, 0);
        }
    }
    // 2. parse <script setup> and  walk over top level statements
    const scriptSetupAst = parse(scriptSetup.content, {
        plugins: [
            ...plugins,
            // allow top level await but only inside <script setup>
            'topLevelAwait'
        ],
        sourceType: 'module'
    }, startOffset);
    for (const node of scriptSetupAst.body) {
        const start = node.start + startOffset;
        let end = node.end + startOffset;
        // locate comment
        if (node.trailingComments && node.trailingComments.length > 0) {
            const lastCommentNode = node.trailingComments[node.trailingComments.length - 1];
            end = lastCommentNode.end + startOffset;
        }
        // locate the end of whitespace between this statement and the next
        while (end <= source.length) {
            if (!/\s/.test(source.charAt(end))) {
                break;
            }
            end++;
        }
        // (Dropped) `ref: x` bindings
        if (node.type === 'LabeledStatement' &&
            node.label.name === 'ref' &&
            node.body.type === 'ExpressionStatement') {
            error(`ref sugar using the label syntax was an experimental proposal and ` +
                `has been dropped based on community feedback. Please check out ` +
                `the new proposal at https://github.com/vuejs/rfcs/discussions/369`, node);
        }
        if (node.type === 'ImportDeclaration') {
            // import declarations are moved to top
            s.move(start, end, 0);
            // dedupe imports
            let removed = 0;
            const removeSpecifier = (i) => {
                const removeLeft = i > removed;
                removed++;
                const current = node.specifiers[i];
                const next = node.specifiers[i + 1];
                s.remove(removeLeft
                    ? node.specifiers[i - 1].end + startOffset
                    : current.start + startOffset, next && !removeLeft
                    ? next.start + startOffset
                    : current.end + startOffset);
            };
            for (let i = 0; i < node.specifiers.length; i++) {
                const specifier = node.specifiers[i];
                const local = specifier.local.name;
                let imported = specifier.type === 'ImportSpecifier' &&
                    specifier.imported.type === 'Identifier' &&
                    specifier.imported.name;
                if (specifier.type === 'ImportNamespaceSpecifier') {
                    imported = '*';
                }
                const source = node.source.value;
                const existing = userImports[local];
                if (source === 'vue' &&
                    (imported === DEFINE_PROPS ||
                        imported === DEFINE_EMITS ||
                        imported === DEFINE_EXPOSE)) {
                    warnOnce(`\`${imported}\` is a compiler macro and no longer needs to be imported.`);
                    removeSpecifier(i);
                }
                else if (existing) {
                    if (existing.source === source && existing.imported === imported) {
                        // already imported in <script setup>, dedupe
                        removeSpecifier(i);
                    }
                    else {
                        error(`different imports aliased to same local name.`, specifier);
                    }
                }
                else {
                    registerUserImport(source, local, imported, node.importKind === 'type' ||
                        (specifier.type === 'ImportSpecifier' &&
                            specifier.importKind === 'type'), true, !options.inlineTemplate);
                }
            }
            if (node.specifiers.length && removed === node.specifiers.length) {
                s.remove(node.start + startOffset, node.end + startOffset);
            }
        }
        if (node.type === 'ExpressionStatement') {
            // process `defineProps` and `defineEmit(s)` calls
            if (processDefineProps(node.expression) ||
                processDefineEmits(node.expression) ||
                processWithDefaults(node.expression)) {
                s.remove(node.start + startOffset, node.end + startOffset);
            }
            else if (processDefineExpose(node.expression)) {
                // defineExpose({}) -> expose({})
                const callee = node.expression.callee;
                s.overwrite(callee.start + startOffset, callee.end + startOffset, 'expose');
            }
        }
        if (node.type === 'VariableDeclaration' && !node.declare) {
            const total = node.declarations.length;
            let left = total;
            for (let i = 0; i < total; i++) {
                const decl = node.declarations[i];
                if (decl.init) {
                    // defineProps / defineEmits
                    const isDefineProps = processDefineProps(decl.init, decl.id) ||
                        processWithDefaults(decl.init, decl.id);
                    const isDefineEmits = processDefineEmits(decl.init, decl.id);
                    if (isDefineProps || isDefineEmits) {
                        if (left === 1) {
                            s.remove(node.start + startOffset, node.end + startOffset);
                        }
                        else {
                            let start = decl.start + startOffset;
                            let end = decl.end + startOffset;
                            if (i < total - 1) {
                                // not the last one, locate the start of the next
                                end = node.declarations[i + 1].start + startOffset;
                            }
                            else {
                                // last one, locate the end of the prev
                                start = node.declarations[i - 1].end + startOffset;
                            }
                            s.remove(start, end);
                            left--;
                        }
                    }
                }
            }
        }
        // walk declarations to record declared bindings
        if ((node.type === 'VariableDeclaration' ||
            node.type === 'FunctionDeclaration' ||
            node.type === 'ClassDeclaration') &&
            !node.declare) {
            walkDeclaration(node, setupBindings, userImportAlias);
        }
        // walk statements & named exports / variable declarations for top level
        // await
        if ((node.type === 'VariableDeclaration' && !node.declare) ||
            node.type.endsWith('Statement')) {
            const scope = [scriptSetupAst.body];
            walk$1(node, {
                enter(child, parent) {
                    if (isFunctionType(child)) {
                        this.skip();
                    }
                    if (child.type === 'BlockStatement') {
                        scope.push(child.body);
                    }
                    if (child.type === 'AwaitExpression') {
                        hasAwait = true;
                        // if the await expression is an expression statement and
                        // - is in the root scope
                        // - or is not the first statement in a nested block scope
                        // then it needs a semicolon before the generated code.
                        const currentScope = scope[scope.length - 1];
                        const needsSemi = currentScope.some((n, i) => {
                            return ((scope.length === 1 || i > 0) &&
                                n.type === 'ExpressionStatement' &&
                                n.start === child.start);
                        });
                        processAwait(child, needsSemi, parent.type === 'ExpressionStatement');
                    }
                },
                exit(node) {
                    if (node.type === 'BlockStatement')
                        scope.pop();
                }
            });
        }
        if ((node.type === 'ExportNamedDeclaration' && node.exportKind !== 'type') ||
            node.type === 'ExportAllDeclaration' ||
            node.type === 'ExportDefaultDeclaration') {
            error(`<script setup> cannot contain ES module exports. ` +
                `If you are using a previous version of <script setup>, please ` +
                `consult the updated RFC at https://github.com/vuejs/rfcs/pull/227.`, node);
        }
        if (isTS) {
            // runtime enum
            if (node.type === 'TSEnumDeclaration') {
                registerBinding(setupBindings, node.id, "setup-const" /* SETUP_CONST */);
            }
            // move all Type declarations to outer scope
            if (node.type.startsWith('TS') ||
                (node.type === 'ExportNamedDeclaration' &&
                    node.exportKind === 'type') ||
                (node.type === 'VariableDeclaration' && node.declare)) {
                recordType(node, declaredTypes);
                s.move(start, end, 0);
            }
        }
    }
    // 3. Apply reactivity transform
    if ((enableReactivityTransform &&
        // normal <script> had ref bindings that maybe used in <script setup>
        (refBindings || shouldTransform(scriptSetup.content))) ||
        propsDestructureDecl) {
        const { rootRefs, importedHelpers } = transformAST(scriptSetupAst, s, startOffset, refBindings, propsDestructuredBindings);
        refBindings = refBindings ? [...refBindings, ...rootRefs] : rootRefs;
        for (const h of importedHelpers) {
            helperImports.add(h);
        }
    }
    // 4. extract runtime props/emits code from setup context type
    if (propsTypeDecl) {
        extractRuntimeProps(propsTypeDecl, typeDeclaredProps, declaredTypes);
    }
    if (emitsTypeDecl) {
        extractRuntimeEmits(emitsTypeDecl, typeDeclaredEmits);
    }
    // 5. check useOptions args to make sure it doesn't reference setup scope
    // variables
    checkInvalidScopeReference(propsRuntimeDecl, DEFINE_PROPS);
    checkInvalidScopeReference(propsRuntimeDefaults, DEFINE_PROPS);
    checkInvalidScopeReference(propsDestructureDecl, DEFINE_PROPS);
    checkInvalidScopeReference(emitsRuntimeDecl, DEFINE_EMITS);
    // 6. remove non-script content
    if (script) {
        if (startOffset < scriptStartOffset) {
            // <script setup> before <script>
            s.remove(0, startOffset);
            s.remove(endOffset, scriptStartOffset);
            s.remove(scriptEndOffset, source.length);
        }
        else {
            // <script> before <script setup>
            s.remove(0, scriptStartOffset);
            s.remove(scriptEndOffset, startOffset);
            s.remove(endOffset, source.length);
        }
    }
    else {
        // only <script setup>
        s.remove(0, startOffset);
        s.remove(endOffset, source.length);
    }
    // 7. analyze binding metadata
    if (scriptAst) {
        Object.assign(bindingMetadata, analyzeScriptBindings(scriptAst.body));
    }
    if (propsRuntimeDecl) {
        for (const key of getObjectOrArrayExpressionKeys(propsRuntimeDecl)) {
            bindingMetadata[key] = "props" /* PROPS */;
        }
    }
    for (const key in typeDeclaredProps) {
        bindingMetadata[key] = "props" /* PROPS */;
    }
    // props aliases
    if (propsDestructureDecl) {
        if (propsDestructureRestId) {
            bindingMetadata[propsDestructureRestId] =
                "setup-reactive-const" /* SETUP_REACTIVE_CONST */;
        }
        for (const key in propsDestructuredBindings) {
            const { local } = propsDestructuredBindings[key];
            if (local !== key) {
                bindingMetadata[local] = "props-aliased" /* PROPS_ALIASED */;
                (bindingMetadata.__propsAliases ||
                    (bindingMetadata.__propsAliases = {}))[local] = key;
            }
        }
    }
    for (const [key, { isType, imported, source }] of Object.entries(userImports)) {
        if (isType)
            continue;
        bindingMetadata[key] =
            imported === '*' ||
                (imported === 'default' && source.endsWith('.vue')) ||
                source === 'vue'
                ? "setup-const" /* SETUP_CONST */
                : "setup-maybe-ref" /* SETUP_MAYBE_REF */;
    }
    for (const key in scriptBindings) {
        bindingMetadata[key] = scriptBindings[key];
    }
    for (const key in setupBindings) {
        bindingMetadata[key] = setupBindings[key];
    }
    // known ref bindings
    if (refBindings) {
        for (const key of refBindings) {
            bindingMetadata[key] = "setup-ref" /* SETUP_REF */;
        }
    }
    // 8. inject `useCssVars` calls
    if (cssVars.length &&
        // no need to do this when targeting SSR
        !(options.inlineTemplate && ((_a = options.templateOptions) === null || _a === void 0 ? void 0 : _a.ssr))) {
        helperImports.add(CSS_VARS_HELPER);
        helperImports.add('unref');
        s.prependRight(startOffset, `\n${genCssVarsCode(cssVars, bindingMetadata, scopeId, isProd)}\n`);
    }
    // 9. finalize setup() argument signature
    let args = `__props`;
    if (propsTypeDecl) {
        // mark as any and only cast on assignment
        // since the user defined complex types may be incompatible with the
        // inferred type from generated runtime declarations
        args += `: any`;
    }
    // inject user assignment of props
    // we use a default __props so that template expressions referencing props
    // can use it directly
    if (propsIdentifier) {
        s.prependLeft(startOffset, `\nconst ${propsIdentifier} = __props${propsTypeDecl ? ` as ${genSetupPropsType(propsTypeDecl)}` : ``}\n`);
    }
    if (propsDestructureRestId) {
        s.prependLeft(startOffset, `\nconst ${propsDestructureRestId} = ${helper(`createPropsRestProxy`)}(__props, ${JSON.stringify(Object.keys(propsDestructuredBindings))})\n`);
    }
    // inject temp variables for async context preservation
    if (hasAwait) {
        const any = isTS ? `: any` : ``;
        s.prependLeft(startOffset, `\nlet __temp${any}, __restore${any}\n`);
    }
    const destructureElements = hasDefineExposeCall || !options.inlineTemplate ? [`expose`] : [];
    if (emitIdentifier) {
        destructureElements.push(emitIdentifier === `emit` ? `emit` : `emit: ${emitIdentifier}`);
    }
    if (destructureElements.length) {
        args += `, { ${destructureElements.join(', ')} }`;
        if (emitsTypeDecl) {
            args += `: { emit: (${scriptSetup.content.slice(emitsTypeDecl.start, emitsTypeDecl.end)}), expose: any, slots: any, attrs: any }`;
        }
    }
    // 10. generate return statement
    let returned;
    if (!options.inlineTemplate || (!sfc.template && hasDefaultExportRender)) {
        // non-inline mode, or has manual render in normal <script>
        // return bindings from script and script setup
        const allBindings = Object.assign(Object.assign({}, scriptBindings), setupBindings);
        for (const key in userImports) {
            if (!userImports[key].isType && userImports[key].isUsedInTemplate) {
                allBindings[key] = true;
            }
        }
        returned = `{ ${Object.keys(allBindings).join(', ')} }`;
    }
    else {
        // inline mode
        if (sfc.template && !sfc.template.src) {
            if (options.templateOptions && options.templateOptions.ssr) {
                hasInlinedSsrRenderFn = true;
            }
            // inline render function mode - we are going to compile the template and
            // inline it right here
            const { code, ast, preamble, tips, errors } = compileTemplate(Object.assign(Object.assign({ filename, source: sfc.template.content, inMap: sfc.template.map }, options.templateOptions), { id: scopeId, scoped: sfc.styles.some(s => s.scoped), isProd: options.isProd, ssrCssVars: sfc.cssVars, compilerOptions: Object.assign(Object.assign({}, (options.templateOptions &&
                    options.templateOptions.compilerOptions)), { inline: true, isTS,
                    bindingMetadata }) }));
            if (tips.length) {
                tips.forEach(warnOnce);
            }
            const err = errors[0];
            if (typeof err === 'string') {
                throw new Error(err);
            }
            else if (err) {
                if (err.loc) {
                    err.message +=
                        `\n\n` +
                            sfc.filename +
                            '\n' +
                            generateCodeFrame(source, err.loc.start.offset, err.loc.end.offset) +
                            `\n`;
                }
                throw err;
            }
            if (preamble) {
                s.prepend(preamble);
            }
            // avoid duplicated unref import
            // as this may get injected by the render function preamble OR the
            // css vars codegen
            if (ast && ast.helpers.includes(UNREF)) {
                helperImports.delete('unref');
            }
            returned = code;
        }
        else {
            returned = `() => {}`;
        }
    }
    if (!options.inlineTemplate && !false) {
        // in non-inline mode, the `__isScriptSetup: true` flag is used by
        // componentPublicInstance proxy to allow properties that start with $ or _
        s.appendRight(endOffset, `\nconst __returned__ = ${returned}\n` +
            `Object.defineProperty(__returned__, '__isScriptSetup', { enumerable: false, value: true })\n` +
            `return __returned__` +
            `\n}\n\n`);
    }
    else {
        s.appendRight(endOffset, `\nreturn ${returned}\n}\n\n`);
    }
    // 11. finalize default export
    let runtimeOptions = ``;
    if (!hasDefaultExportName && filename && filename !== DEFAULT_FILENAME) {
        const match = filename.match(/([^/\\]+)\.\w+$/);
        if (match) {
            runtimeOptions += `\n  __name: '${match[1]}',`;
        }
    }
    if (hasInlinedSsrRenderFn) {
        runtimeOptions += `\n  __ssrInlineRender: true,`;
    }
    if (propsRuntimeDecl) {
        let declCode = scriptSetup.content
            .slice(propsRuntimeDecl.start, propsRuntimeDecl.end)
            .trim();
        if (propsDestructureDecl) {
            const defaults = [];
            for (const key in propsDestructuredBindings) {
                const d = genDestructuredDefaultValue(key);
                if (d)
                    defaults.push(`${key}: ${d}`);
            }
            if (defaults.length) {
                declCode = `${helper(`mergeDefaults`)}(${declCode}, {\n  ${defaults.join(',\n  ')}\n})`;
            }
        }
        runtimeOptions += `\n  props: ${declCode},`;
    }
    else if (propsTypeDecl) {
        runtimeOptions += genRuntimeProps(typeDeclaredProps);
    }
    if (emitsRuntimeDecl) {
        runtimeOptions += `\n  emits: ${scriptSetup.content
            .slice(emitsRuntimeDecl.start, emitsRuntimeDecl.end)
            .trim()},`;
    }
    else if (emitsTypeDecl) {
        runtimeOptions += genRuntimeEmits(typeDeclaredEmits);
    }
    // <script setup> components are closed by default. If the user did not
    // explicitly call `defineExpose`, call expose() with no args.
    const exposeCall = hasDefineExposeCall || options.inlineTemplate ? `` : `  expose();\n`;
    // wrap setup code with function.
    if (isTS) {
        // for TS, make sure the exported type is still valid type with
        // correct props information
        // we have to use object spread for types to be merged properly
        // user's TS setting should compile it down to proper targets
        // export default defineComponent({ ...__default__, ... })
        const def = defaultExport ? `\n  ...${DEFAULT_VAR},` : ``;
        s.prependLeft(startOffset, `\nexport default /*#__PURE__*/${helper(`defineComponent`)}({${def}${runtimeOptions}\n  ${hasAwait ? `async ` : ``}setup(${args}) {\n${exposeCall}`);
        s.appendRight(endOffset, `})`);
    }
    else {
        if (defaultExport) {
            // without TS, can't rely on rest spread, so we use Object.assign
            // export default Object.assign(__default__, { ... })
            s.prependLeft(startOffset, `\nexport default /*#__PURE__*/Object.assign(${DEFAULT_VAR}, {${runtimeOptions}\n  ` +
                `${hasAwait ? `async ` : ``}setup(${args}) {\n${exposeCall}`);
            s.appendRight(endOffset, `})`);
        }
        else {
            s.prependLeft(startOffset, `\nexport default {${runtimeOptions}\n  ` +
                `${hasAwait ? `async ` : ``}setup(${args}) {\n${exposeCall}`);
            s.appendRight(endOffset, `}`);
        }
    }
    // 12. finalize Vue helper imports
    if (helperImports.size > 0) {
        s.prepend(`import { ${[...helperImports]
            .map(h => `${h} as _${h}`)
            .join(', ')} } from 'vue'\n`);
    }
    s.trim();
    return Object.assign(Object.assign({}, scriptSetup), { bindings: bindingMetadata, imports: userImports, content: s.toString(), map: genSourceMap
            ? s.generateMap({
                source: filename,
                hires: true,
                includeContent: true
            })
            : undefined, scriptAst: scriptAst === null || scriptAst === void 0 ? void 0 : scriptAst.body, scriptSetupAst: scriptSetupAst === null || scriptSetupAst === void 0 ? void 0 : scriptSetupAst.body });
}
function registerBinding(bindings, node, type) {
    bindings[node.name] = type;
}
function walkDeclaration(node, bindings, userImportAlias) {
    if (node.type === 'VariableDeclaration') {
        const isConst = node.kind === 'const';
        // export const foo = ...
        for (const { id, init } of node.declarations) {
            const isDefineCall = !!(isConst &&
                isCallOf(init, c => c === DEFINE_PROPS || c === DEFINE_EMITS || c === WITH_DEFAULTS));
            if (id.type === 'Identifier') {
                let bindingType;
                const userReactiveBinding = userImportAlias['reactive'] || 'reactive';
                if (isCallOf(init, userReactiveBinding)) {
                    // treat reactive() calls as let since it's meant to be mutable
                    bindingType = isConst
                        ? "setup-reactive-const" /* SETUP_REACTIVE_CONST */
                        : "setup-let" /* SETUP_LET */;
                }
                else if (
                // if a declaration is a const literal, we can mark it so that
                // the generated render fn code doesn't need to unref() it
                isDefineCall ||
                    (isConst && canNeverBeRef(init, userReactiveBinding))) {
                    bindingType = isCallOf(init, DEFINE_PROPS)
                        ? "setup-reactive-const" /* SETUP_REACTIVE_CONST */
                        : "setup-const" /* SETUP_CONST */;
                }
                else if (isConst) {
                    if (isCallOf(init, userImportAlias['ref'] || 'ref')) {
                        bindingType = "setup-ref" /* SETUP_REF */;
                    }
                    else {
                        bindingType = "setup-maybe-ref" /* SETUP_MAYBE_REF */;
                    }
                }
                else {
                    bindingType = "setup-let" /* SETUP_LET */;
                }
                registerBinding(bindings, id, bindingType);
            }
            else {
                if (isCallOf(init, DEFINE_PROPS)) {
                    // skip walking props destructure
                    return;
                }
                if (id.type === 'ObjectPattern') {
                    walkObjectPattern(id, bindings, isConst, isDefineCall);
                }
                else if (id.type === 'ArrayPattern') {
                    walkArrayPattern(id, bindings, isConst, isDefineCall);
                }
            }
        }
    }
    else if (node.type === 'TSEnumDeclaration' ||
        node.type === 'FunctionDeclaration' ||
        node.type === 'ClassDeclaration') {
        // export function foo() {} / export class Foo {}
        // export declarations must be named.
        bindings[node.id.name] = "setup-const" /* SETUP_CONST */;
    }
}
function walkObjectPattern(node, bindings, isConst, isDefineCall = false) {
    for (const p of node.properties) {
        if (p.type === 'ObjectProperty') {
            if (p.key.type === 'Identifier' && p.key === p.value) {
                // shorthand: const { x } = ...
                const type = isDefineCall
                    ? "setup-const" /* SETUP_CONST */
                    : isConst
                        ? "setup-maybe-ref" /* SETUP_MAYBE_REF */
                        : "setup-let" /* SETUP_LET */;
                registerBinding(bindings, p.key, type);
            }
            else {
                walkPattern(p.value, bindings, isConst, isDefineCall);
            }
        }
        else {
            // ...rest
            // argument can only be identifier when destructuring
            const type = isConst ? "setup-const" /* SETUP_CONST */ : "setup-let" /* SETUP_LET */;
            registerBinding(bindings, p.argument, type);
        }
    }
}
function walkArrayPattern(node, bindings, isConst, isDefineCall = false) {
    for (const e of node.elements) {
        e && walkPattern(e, bindings, isConst, isDefineCall);
    }
}
function walkPattern(node, bindings, isConst, isDefineCall = false) {
    if (node.type === 'Identifier') {
        const type = isDefineCall
            ? "setup-const" /* SETUP_CONST */
            : isConst
                ? "setup-maybe-ref" /* SETUP_MAYBE_REF */
                : "setup-let" /* SETUP_LET */;
        registerBinding(bindings, node, type);
    }
    else if (node.type === 'RestElement') {
        // argument can only be identifier when destructuring
        const type = isConst ? "setup-const" /* SETUP_CONST */ : "setup-let" /* SETUP_LET */;
        registerBinding(bindings, node.argument, type);
    }
    else if (node.type === 'ObjectPattern') {
        walkObjectPattern(node, bindings, isConst);
    }
    else if (node.type === 'ArrayPattern') {
        walkArrayPattern(node, bindings, isConst);
    }
    else if (node.type === 'AssignmentPattern') {
        if (node.left.type === 'Identifier') {
            const type = isDefineCall
                ? "setup-const" /* SETUP_CONST */
                : isConst
                    ? "setup-maybe-ref" /* SETUP_MAYBE_REF */
                    : "setup-let" /* SETUP_LET */;
            registerBinding(bindings, node.left, type);
        }
        else {
            walkPattern(node.left, bindings, isConst);
        }
    }
}
function recordType(node, declaredTypes) {
    if (node.type === 'TSInterfaceDeclaration') {
        declaredTypes[node.id.name] = [`Object`];
    }
    else if (node.type === 'TSTypeAliasDeclaration') {
        declaredTypes[node.id.name] = inferRuntimeType(node.typeAnnotation, declaredTypes);
    }
    else if (node.type === 'ExportNamedDeclaration' && node.declaration) {
        recordType(node.declaration, declaredTypes);
    }
}
function extractRuntimeProps(node, props, declaredTypes, isProd) {
    const members = node.type === 'TSTypeLiteral' ? node.members : node.body;
    for (const m of members) {
        if ((m.type === 'TSPropertySignature' || m.type === 'TSMethodSignature') &&
            m.key.type === 'Identifier') {
            let type;
            if (m.type === 'TSMethodSignature') {
                type = ['Function'];
            }
            else if (m.typeAnnotation) {
                type = inferRuntimeType(m.typeAnnotation.typeAnnotation, declaredTypes);
            }
            props[m.key.name] = {
                key: m.key.name,
                required: !m.optional,
                type: type || [`null`]
            };
        }
    }
}
function inferRuntimeType(node, declaredTypes) {
    switch (node.type) {
        case 'TSStringKeyword':
            return ['String'];
        case 'TSNumberKeyword':
            return ['Number'];
        case 'TSBooleanKeyword':
            return ['Boolean'];
        case 'TSObjectKeyword':
            return ['Object'];
        case 'TSTypeLiteral':
            // TODO (nice to have) generate runtime property validation
            return ['Object'];
        case 'TSFunctionType':
            return ['Function'];
        case 'TSArrayType':
        case 'TSTupleType':
            // TODO (nice to have) generate runtime element type/length checks
            return ['Array'];
        case 'TSLiteralType':
            switch (node.literal.type) {
                case 'StringLiteral':
                    return ['String'];
                case 'BooleanLiteral':
                    return ['Boolean'];
                case 'NumericLiteral':
                case 'BigIntLiteral':
                    return ['Number'];
                default:
                    return [`null`];
            }
        case 'TSTypeReference':
            if (node.typeName.type === 'Identifier') {
                if (declaredTypes[node.typeName.name]) {
                    return declaredTypes[node.typeName.name];
                }
                switch (node.typeName.name) {
                    case 'Array':
                    case 'Function':
                    case 'Object':
                    case 'Set':
                    case 'Map':
                    case 'WeakSet':
                    case 'WeakMap':
                    case 'Date':
                    case 'Promise':
                        return [node.typeName.name];
                    case 'Record':
                    case 'Partial':
                    case 'Readonly':
                    case 'Pick':
                    case 'Omit':
                    case 'Exclude':
                    case 'Extract':
                    case 'Required':
                    case 'InstanceType':
                        return ['Object'];
                }
            }
            return [`null`];
        case 'TSParenthesizedType':
            return inferRuntimeType(node.typeAnnotation, declaredTypes);
        case 'TSUnionType':
            return [
                ...new Set([].concat(...node.types.map(t => inferRuntimeType(t, declaredTypes))))
            ];
        case 'TSIntersectionType':
            return ['Object'];
        case 'TSSymbolKeyword':
            return ['Symbol'];
        default:
            return [`null`]; // no runtime check
    }
}
function toRuntimeTypeString(types) {
    return types.length > 1 ? `[${types.join(', ')}]` : types[0];
}
function extractRuntimeEmits(node, emits) {
    if (node.type === 'TSTypeLiteral' || node.type === 'TSInterfaceBody') {
        const members = node.type === 'TSTypeLiteral' ? node.members : node.body;
        for (let t of members) {
            if (t.type === 'TSCallSignatureDeclaration') {
                extractEventNames(t.parameters[0], emits);
            }
        }
        return;
    }
    else {
        extractEventNames(node.parameters[0], emits);
    }
}
function extractEventNames(eventName, emits) {
    if (eventName.type === 'Identifier' &&
        eventName.typeAnnotation &&
        eventName.typeAnnotation.type === 'TSTypeAnnotation') {
        const typeNode = eventName.typeAnnotation.typeAnnotation;
        if (typeNode.type === 'TSLiteralType') {
            if (typeNode.literal.type !== 'UnaryExpression') {
                emits.add(String(typeNode.literal.value));
            }
        }
        else if (typeNode.type === 'TSUnionType') {
            for (const t of typeNode.types) {
                if (t.type === 'TSLiteralType' &&
                    t.literal.type !== 'UnaryExpression') {
                    emits.add(String(t.literal.value));
                }
            }
        }
    }
}
function genRuntimeEmits(emits) {
    return emits.size
        ? `\n  emits: [${Array.from(emits)
            .map(p => JSON.stringify(p))
            .join(', ')}],`
        : ``;
}
function isCallOf(node, test) {
    return !!(node &&
        node.type === 'CallExpression' &&
        node.callee.type === 'Identifier' &&
        (typeof test === 'string'
            ? node.callee.name === test
            : test(node.callee.name)));
}
function canNeverBeRef(node, userReactiveImport) {
    if (isCallOf(node, userReactiveImport)) {
        return true;
    }
    switch (node.type) {
        case 'UnaryExpression':
        case 'BinaryExpression':
        case 'ArrayExpression':
        case 'ObjectExpression':
        case 'FunctionExpression':
        case 'ArrowFunctionExpression':
        case 'UpdateExpression':
        case 'ClassExpression':
        case 'TaggedTemplateExpression':
            return true;
        case 'SequenceExpression':
            return canNeverBeRef(node.expressions[node.expressions.length - 1], userReactiveImport);
        default:
            if (node.type.endsWith('Literal')) {
                return true;
            }
            return false;
    }
}
/**
 * Analyze bindings in normal `<script>`
 * Note that `compileScriptSetup` already analyzes bindings as part of its
 * compilation process so this should only be used on single `<script>` SFCs.
 */
function analyzeScriptBindings(ast) {
    for (const node of ast) {
        if (node.type === 'ExportDefaultDeclaration' &&
            node.declaration.type === 'ObjectExpression') {
            return analyzeBindingsFromOptions(node.declaration);
        }
    }
    return {};
}
function analyzeBindingsFromOptions(node) {
    const bindings = {};
    // #3270, #3275
    // mark non-script-setup so we don't resolve components/directives from these
    Object.defineProperty(bindings, '__isScriptSetup', {
        enumerable: false,
        value: false
    });
    for (const property of node.properties) {
        if (property.type === 'ObjectProperty' &&
            !property.computed &&
            property.key.type === 'Identifier') {
            // props
            if (property.key.name === 'props') {
                // props: ['foo']
                // props: { foo: ... }
                for (const key of getObjectOrArrayExpressionKeys(property.value)) {
                    bindings[key] = "props" /* PROPS */;
                }
            }
            // inject
            else if (property.key.name === 'inject') {
                // inject: ['foo']
                // inject: { foo: {} }
                for (const key of getObjectOrArrayExpressionKeys(property.value)) {
                    bindings[key] = "options" /* OPTIONS */;
                }
            }
            // computed & methods
            else if (property.value.type === 'ObjectExpression' &&
                (property.key.name === 'computed' || property.key.name === 'methods')) {
                // methods: { foo() {} }
                // computed: { foo() {} }
                for (const key of getObjectExpressionKeys(property.value)) {
                    bindings[key] = "options" /* OPTIONS */;
                }
            }
        }
        // setup & data
        else if (property.type === 'ObjectMethod' &&
            property.key.type === 'Identifier' &&
            (property.key.name === 'setup' || property.key.name === 'data')) {
            for (const bodyItem of property.body.body) {
                // setup() {
                //   return {
                //     foo: null
                //   }
                // }
                if (bodyItem.type === 'ReturnStatement' &&
                    bodyItem.argument &&
                    bodyItem.argument.type === 'ObjectExpression') {
                    for (const key of getObjectExpressionKeys(bodyItem.argument)) {
                        bindings[key] =
                            property.key.name === 'setup'
                                ? "setup-maybe-ref" /* SETUP_MAYBE_REF */
                                : "data" /* DATA */;
                    }
                }
            }
        }
    }
    return bindings;
}
function getObjectExpressionKeys(node) {
    const keys = [];
    for (const prop of node.properties) {
        if ((prop.type === 'ObjectProperty' || prop.type === 'ObjectMethod') &&
            !prop.computed) {
            if (prop.key.type === 'Identifier') {
                keys.push(prop.key.name);
            }
            else if (prop.key.type === 'StringLiteral') {
                keys.push(prop.key.value);
            }
        }
    }
    return keys;
}
function getArrayExpressionKeys(node) {
    const keys = [];
    for (const element of node.elements) {
        if (element && element.type === 'StringLiteral') {
            keys.push(element.value);
        }
    }
    return keys;
}
function getObjectOrArrayExpressionKeys(value) {
    if (value.type === 'ArrayExpression') {
        return getArrayExpressionKeys(value);
    }
    if (value.type === 'ObjectExpression') {
        return getObjectExpressionKeys(value);
    }
    return [];
}
const templateUsageCheckCache = createCache();
function resolveTemplateUsageCheckString(sfc) {
    const { content, ast } = sfc.template;
    const cached = templateUsageCheckCache.get(content);
    if (cached) {
        return cached;
    }
    let code = '';
    transform(createRoot([ast]), {
        nodeTransforms: [
            node => {
                if (node.type === 1 /* ELEMENT */) {
                    if (!parserOptions.isNativeTag(node.tag) &&
                        !parserOptions.isBuiltInComponent(node.tag)) {
                        code += `,${camelize(node.tag)},${capitalize(camelize(node.tag))}`;
                    }
                    for (let i = 0; i < node.props.length; i++) {
                        const prop = node.props[i];
                        if (prop.type === 7 /* DIRECTIVE */) {
                            if (!isBuiltInDir(prop.name)) {
                                code += `,v${capitalize(camelize(prop.name))}`;
                            }
                            if (prop.exp) {
                                code += `,${processExp(prop.exp.content, prop.name)}`;
                            }
                        }
                    }
                }
                else if (node.type === 5 /* INTERPOLATION */) {
                    code += `,${processExp(node.content.content)}`;
                }
            }
        ]
    });
    code += ';';
    templateUsageCheckCache.set(content, code);
    return code;
}
const forAliasRE$1 = /([\s\S]*?)\s+(?:in|of)\s+([\s\S]*)/;
function processExp(exp, dir) {
    if (/ as\s+\w|<.*>|:/.test(exp)) {
        if (dir === 'slot') {
            exp = `(${exp})=>{}`;
        }
        else if (dir === 'for') {
            const inMatch = exp.match(forAliasRE$1);
            if (inMatch) {
                const [, LHS, RHS] = inMatch;
                return processExp(`(${LHS})=>{}`) + processExp(RHS);
            }
        }
        let ret = '';
        // has potential type cast or generic arguments that uses types
        const ast = parseExpression_1(exp, { plugins: ['typescript'] });
        walkIdentifiers(ast, node => {
            ret += `,` + node.name;
        });
        return ret;
    }
    return stripStrings(exp);
}
function stripStrings(exp) {
    return exp
        .replace(/'[^']*'|"[^"]*"/g, '')
        .replace(/`[^`]+`/g, stripTemplateString);
}
function stripTemplateString(str) {
    const interpMatch = str.match(/\${[^}]+}/g);
    if (interpMatch) {
        return interpMatch.map(m => m.slice(2, -1)).join(',');
    }
    return '';
}
function isImportUsed(local, sfc) {
    return new RegExp(
    // #4274 escape $ since it's a special char in regex
    // (and is the only regex special char that is valid in identifiers)
    `[^\\w$_]${local.replace(/\$/g, '\\$')}[^\\w$_]`).test(resolveTemplateUsageCheckString(sfc));
}
/**
 * Note: this comparison assumes the prev/next script are already identical,
 * and only checks the special case where <script setup lang="ts"> unused import
 * pruning result changes due to template changes.
 */
function hmrShouldReload(prevImports, next) {
    if (!next.scriptSetup ||
        (next.scriptSetup.lang !== 'ts' && next.scriptSetup.lang !== 'tsx')) {
        return false;
    }
    // for each previous import, check if its used status remain the same based on
    // the next descriptor's template
    for (const key in prevImports) {
        // if an import was previous unused, but now is used, we need to force
        // reload so that the script now includes that import.
        if (!prevImports[key].isUsedInTemplate && isImportUsed(key, next)) {
            return true;
        }
    }
    return false;
}

const DEFAULT_FILENAME = 'anonymous.vue';
const sourceToSFC = createCache();
function parse$4(source, { sourceMap = true, filename = DEFAULT_FILENAME, sourceRoot = '', pad = false, ignoreEmpty = true, compiler = CompilerDOM } = {}) {
    const sourceKey = source + sourceMap + filename + sourceRoot + pad + compiler.parse;
    const cache = sourceToSFC.get(sourceKey);
    if (cache) {
        return cache;
    }
    const descriptor = {
        filename,
        source,
        template: null,
        script: null,
        scriptSetup: null,
        styles: [],
        customBlocks: [],
        cssVars: [],
        slotted: false,
        shouldForceReload: prevImports => hmrShouldReload(prevImports, descriptor)
    };
    const errors = [];
    const ast = compiler.parse(source, {
        // there are no components at SFC parsing level
        isNativeTag: () => true,
        // preserve all whitespaces
        isPreTag: () => true,
        getTextMode: ({ tag, props }, parent) => {
            // all top level elements except <template> are parsed as raw text
            // containers
            if ((!parent && tag !== 'template') ||
                // <template lang="xxx"> should also be treated as raw text
                (tag === 'template' &&
                    props.some(p => p.type === 6 /* ATTRIBUTE */ &&
                        p.name === 'lang' &&
                        p.value &&
                        p.value.content &&
                        p.value.content !== 'html'))) {
                return 2 /* RAWTEXT */;
            }
            else {
                return 0 /* DATA */;
            }
        },
        onError: e => {
            errors.push(e);
        }
    });
    ast.children.forEach(node => {
        if (node.type !== 1 /* ELEMENT */) {
            return;
        }
        // we only want to keep the nodes that are not empty (when the tag is not a template)
        if (ignoreEmpty &&
            node.tag !== 'template' &&
            isEmpty(node) &&
            !hasSrc(node)) {
            return;
        }
        switch (node.tag) {
            case 'template':
                if (!descriptor.template) {
                    const templateBlock = (descriptor.template = createBlock(node, source, false));
                    templateBlock.ast = node;
                    // warn against 2.x <template functional>
                    if (templateBlock.attrs.functional) {
                        const err = new SyntaxError(`<template functional> is no longer supported in Vue 3, since ` +
                            `functional components no longer have significant performance ` +
                            `difference from stateful ones. Just use a normal <template> ` +
                            `instead.`);
                        err.loc = node.props.find(p => p.name === 'functional').loc;
                        errors.push(err);
                    }
                }
                else {
                    errors.push(createDuplicateBlockError(node));
                }
                break;
            case 'script':
                const scriptBlock = createBlock(node, source, pad);
                const isSetup = !!scriptBlock.attrs.setup;
                if (isSetup && !descriptor.scriptSetup) {
                    descriptor.scriptSetup = scriptBlock;
                    break;
                }
                if (!isSetup && !descriptor.script) {
                    descriptor.script = scriptBlock;
                    break;
                }
                errors.push(createDuplicateBlockError(node, isSetup));
                break;
            case 'style':
                const styleBlock = createBlock(node, source, pad);
                if (styleBlock.attrs.vars) {
                    errors.push(new SyntaxError(`<style vars> has been replaced by a new proposal: ` +
                        `https://github.com/vuejs/rfcs/pull/231`));
                }
                descriptor.styles.push(styleBlock);
                break;
            default:
                descriptor.customBlocks.push(createBlock(node, source, pad));
                break;
        }
    });
    if (descriptor.scriptSetup) {
        if (descriptor.scriptSetup.src) {
            errors.push(new SyntaxError(`<script setup> cannot use the "src" attribute because ` +
                `its syntax will be ambiguous outside of the component.`));
            descriptor.scriptSetup = null;
        }
        if (descriptor.script && descriptor.script.src) {
            errors.push(new SyntaxError(`<script> cannot use the "src" attribute when <script setup> is ` +
                `also present because they must be processed together.`));
            descriptor.script = null;
        }
    }
    if (sourceMap) {
        const genMap = (block) => {
            if (block && !block.src) {
                block.map = generateSourceMap(filename, source, block.content, sourceRoot, !pad || block.type === 'template' ? block.loc.start.line - 1 : 0);
            }
        };
        genMap(descriptor.template);
        genMap(descriptor.script);
        descriptor.styles.forEach(genMap);
        descriptor.customBlocks.forEach(genMap);
    }
    // parse CSS vars
    descriptor.cssVars = parseCssVars(descriptor);
    // check if the SFC uses :slotted
    const slottedRE = /(?:::v-|:)slotted\(/;
    descriptor.slotted = descriptor.styles.some(s => s.scoped && slottedRE.test(s.content));
    const result = {
        descriptor,
        errors
    };
    sourceToSFC.set(sourceKey, result);
    return result;
}
function createDuplicateBlockError(node, isScriptSetup = false) {
    const err = new SyntaxError(`Single file component can contain only one <${node.tag}${isScriptSetup ? ` setup` : ``}> element`);
    err.loc = node.loc;
    return err;
}
function createBlock(node, source, pad) {
    const type = node.tag;
    let { start, end } = node.loc;
    let content = '';
    if (node.children.length) {
        start = node.children[0].loc.start;
        end = node.children[node.children.length - 1].loc.end;
        content = source.slice(start.offset, end.offset);
    }
    else {
        const offset = node.loc.source.indexOf(`</`);
        if (offset > -1) {
            start = {
                line: start.line,
                column: start.column + offset,
                offset: start.offset + offset
            };
        }
        end = Object.assign({}, start);
    }
    const loc = {
        source: content,
        start,
        end
    };
    const attrs = {};
    const block = {
        type,
        content,
        loc,
        attrs
    };
    if (pad) {
        block.content = padContent(source, block, pad) + block.content;
    }
    node.props.forEach(p => {
        if (p.type === 6 /* ATTRIBUTE */) {
            attrs[p.name] = p.value ? p.value.content || true : true;
            if (p.name === 'lang') {
                block.lang = p.value && p.value.content;
            }
            else if (p.name === 'src') {
                block.src = p.value && p.value.content;
            }
            else if (type === 'style') {
                if (p.name === 'scoped') {
                    block.scoped = true;
                }
                else if (p.name === 'module') {
                    block.module = attrs[p.name];
                }
            }
            else if (type === 'script' && p.name === 'setup') {
                block.setup = attrs.setup;
            }
        }
    });
    return block;
}
const splitRE = /\r?\n/g;
const emptyRE = /^(?:\/\/)?\s*$/;
const replaceRE = /./g;
function generateSourceMap(filename, source, generated, sourceRoot, lineOffset) {
    const map = new SourceMapGenerator$2({
        file: filename.replace(/\\/g, '/'),
        sourceRoot: sourceRoot.replace(/\\/g, '/')
    });
    map.setSourceContent(filename, source);
    generated.split(splitRE).forEach((line, index) => {
        if (!emptyRE.test(line)) {
            const originalLine = index + 1 + lineOffset;
            const generatedLine = index + 1;
            for (let i = 0; i < line.length; i++) {
                if (!/\s/.test(line[i])) {
                    map.addMapping({
                        source: filename,
                        original: {
                            line: originalLine,
                            column: i
                        },
                        generated: {
                            line: generatedLine,
                            column: i
                        }
                    });
                }
            }
        }
    });
    return JSON.parse(map.toString());
}
function padContent(content, block, pad) {
    content = content.slice(0, block.loc.start.offset);
    if (pad === 'space') {
        return content.replace(replaceRE, ' ');
    }
    else {
        const offset = content.split(splitRE).length;
        const padChar = block.type === 'script' && !block.lang ? '//\n' : '\n';
        return Array(offset).join(padChar);
    }
}
function hasSrc(node) {
    return node.props.some(p => {
        if (p.type !== 6 /* ATTRIBUTE */) {
            return false;
        }
        return p.name === 'src';
    });
}
/**
 * Returns true if the node has no children
 * once the empty text nodes (trimmed content) have been filtered out.
 */
function isEmpty(node) {
    for (let i = 0; i < node.children.length; i++) {
        const child = node.children[i];
        if (child.type !== 2 /* TEXT */ || child.content.trim() !== '') {
            return false;
        }
    }
    return true;
}

// MIT lisence
// from https://github.com/substack/tty-browserify/blob/1ba769a6429d242f36226538835b4034bf6b7886/index.js

function isatty() {
  return false;
}

function ReadStream() {
  throw new Error('tty.ReadStream is not implemented');
}

function WriteStream() {
  throw new Error('tty.ReadStream is not implemented');
}

var _polyfillNode_tty = {
  isatty: isatty,
  ReadStream: ReadStream,
  WriteStream: WriteStream
};

var _polyfillNode_tty$1 = /*#__PURE__*/Object.freeze({
  __proto__: null,
  isatty: isatty,
  ReadStream: ReadStream,
  WriteStream: WriteStream,
  'default': _polyfillNode_tty
});

var tty = /*@__PURE__*/getAugmentedNamespace(_polyfillNode_tty$1);

let isColorSupported =
	!("NO_COLOR" in ({}) || browser$1.argv.includes("--no-color")) &&
	("FORCE_COLOR" in ({}) ||
		browser$1.argv.includes("--color") ||
		"" === "win32" ||
		(tty.isatty(1) && ({}).TERM !== "dumb") ||
		"CI" in ({}));

let formatter =
	(open, close, replace = open) =>
	input => {
		let string = "" + input;
		let index = string.indexOf(close, open.length);
		return ~index
			? open + replaceClose(string, close, replace, index) + close
			: open + string + close
	};

let replaceClose = (string, close, replace, index) => {
	let start = string.substring(0, index) + replace;
	let end = string.substring(index + close.length);
	let nextIndex = end.indexOf(close);
	return ~nextIndex ? start + replaceClose(end, close, replace, nextIndex) : start + end
};

let createColors = (enabled = isColorSupported) => ({
	isColorSupported: enabled,
	reset: enabled ? s => `\x1b[0m${s}\x1b[0m` : String,
	bold: enabled ? formatter("\x1b[1m", "\x1b[22m", "\x1b[22m\x1b[1m") : String,
	dim: enabled ? formatter("\x1b[2m", "\x1b[22m", "\x1b[22m\x1b[2m") : String,
	italic: enabled ? formatter("\x1b[3m", "\x1b[23m") : String,
	underline: enabled ? formatter("\x1b[4m", "\x1b[24m") : String,
	inverse: enabled ? formatter("\x1b[7m", "\x1b[27m") : String,
	hidden: enabled ? formatter("\x1b[8m", "\x1b[28m") : String,
	strikethrough: enabled ? formatter("\x1b[9m", "\x1b[29m") : String,
	black: enabled ? formatter("\x1b[30m", "\x1b[39m") : String,
	red: enabled ? formatter("\x1b[31m", "\x1b[39m") : String,
	green: enabled ? formatter("\x1b[32m", "\x1b[39m") : String,
	yellow: enabled ? formatter("\x1b[33m", "\x1b[39m") : String,
	blue: enabled ? formatter("\x1b[34m", "\x1b[39m") : String,
	magenta: enabled ? formatter("\x1b[35m", "\x1b[39m") : String,
	cyan: enabled ? formatter("\x1b[36m", "\x1b[39m") : String,
	white: enabled ? formatter("\x1b[37m", "\x1b[39m") : String,
	gray: enabled ? formatter("\x1b[90m", "\x1b[39m") : String,
	bgBlack: enabled ? formatter("\x1b[40m", "\x1b[49m") : String,
	bgRed: enabled ? formatter("\x1b[41m", "\x1b[49m") : String,
	bgGreen: enabled ? formatter("\x1b[42m", "\x1b[49m") : String,
	bgYellow: enabled ? formatter("\x1b[43m", "\x1b[49m") : String,
	bgBlue: enabled ? formatter("\x1b[44m", "\x1b[49m") : String,
	bgMagenta: enabled ? formatter("\x1b[45m", "\x1b[49m") : String,
	bgCyan: enabled ? formatter("\x1b[46m", "\x1b[49m") : String,
	bgWhite: enabled ? formatter("\x1b[47m", "\x1b[49m") : String,
});

var picocolors = createColors();
var createColors_1 = createColors;
picocolors.createColors = createColors_1;

const SINGLE_QUOTE = "'".charCodeAt(0);
const DOUBLE_QUOTE = '"'.charCodeAt(0);
const BACKSLASH = '\\'.charCodeAt(0);
const SLASH = '/'.charCodeAt(0);
const NEWLINE = '\n'.charCodeAt(0);
const SPACE = ' '.charCodeAt(0);
const FEED = '\f'.charCodeAt(0);
const TAB = '\t'.charCodeAt(0);
const CR = '\r'.charCodeAt(0);
const OPEN_SQUARE = '['.charCodeAt(0);
const CLOSE_SQUARE = ']'.charCodeAt(0);
const OPEN_PARENTHESES = '('.charCodeAt(0);
const CLOSE_PARENTHESES = ')'.charCodeAt(0);
const OPEN_CURLY = '{'.charCodeAt(0);
const CLOSE_CURLY = '}'.charCodeAt(0);
const SEMICOLON = ';'.charCodeAt(0);
const ASTERISK = '*'.charCodeAt(0);
const COLON = ':'.charCodeAt(0);
const AT = '@'.charCodeAt(0);

const RE_AT_END = /[\t\n\f\r "#'()/;[\\\]{}]/g;
const RE_WORD_END = /[\t\n\f\r !"#'():;@[\\\]{}]|\/(?=\*)/g;
const RE_BAD_BRACKET = /.[\n"'(/\\]/;
const RE_HEX_ESCAPE = /[\da-f]/i;

var tokenize = function tokenizer(input, options = {}) {
  let css = input.css.valueOf();
  let ignore = options.ignoreErrors;

  let code, next, quote, content, escape;
  let escaped, escapePos, prev, n, currentToken;

  let length = css.length;
  let pos = 0;
  let buffer = [];
  let returned = [];

  function position() {
    return pos
  }

  function unclosed(what) {
    throw input.error('Unclosed ' + what, pos)
  }

  function endOfFile() {
    return returned.length === 0 && pos >= length
  }

  function nextToken(opts) {
    if (returned.length) return returned.pop()
    if (pos >= length) return

    let ignoreUnclosed = opts ? opts.ignoreUnclosed : false;

    code = css.charCodeAt(pos);

    switch (code) {
      case NEWLINE:
      case SPACE:
      case TAB:
      case CR:
      case FEED: {
        next = pos;
        do {
          next += 1;
          code = css.charCodeAt(next);
        } while (
          code === SPACE ||
          code === NEWLINE ||
          code === TAB ||
          code === CR ||
          code === FEED
        )

        currentToken = ['space', css.slice(pos, next)];
        pos = next - 1;
        break
      }

      case OPEN_SQUARE:
      case CLOSE_SQUARE:
      case OPEN_CURLY:
      case CLOSE_CURLY:
      case COLON:
      case SEMICOLON:
      case CLOSE_PARENTHESES: {
        let controlChar = String.fromCharCode(code);
        currentToken = [controlChar, controlChar, pos];
        break
      }

      case OPEN_PARENTHESES: {
        prev = buffer.length ? buffer.pop()[1] : '';
        n = css.charCodeAt(pos + 1);
        if (
          prev === 'url' &&
          n !== SINGLE_QUOTE &&
          n !== DOUBLE_QUOTE &&
          n !== SPACE &&
          n !== NEWLINE &&
          n !== TAB &&
          n !== FEED &&
          n !== CR
        ) {
          next = pos;
          do {
            escaped = false;
            next = css.indexOf(')', next + 1);
            if (next === -1) {
              if (ignore || ignoreUnclosed) {
                next = pos;
                break
              } else {
                unclosed('bracket');
              }
            }
            escapePos = next;
            while (css.charCodeAt(escapePos - 1) === BACKSLASH) {
              escapePos -= 1;
              escaped = !escaped;
            }
          } while (escaped)

          currentToken = ['brackets', css.slice(pos, next + 1), pos, next];

          pos = next;
        } else {
          next = css.indexOf(')', pos + 1);
          content = css.slice(pos, next + 1);

          if (next === -1 || RE_BAD_BRACKET.test(content)) {
            currentToken = ['(', '(', pos];
          } else {
            currentToken = ['brackets', content, pos, next];
            pos = next;
          }
        }

        break
      }

      case SINGLE_QUOTE:
      case DOUBLE_QUOTE: {
        quote = code === SINGLE_QUOTE ? "'" : '"';
        next = pos;
        do {
          escaped = false;
          next = css.indexOf(quote, next + 1);
          if (next === -1) {
            if (ignore || ignoreUnclosed) {
              next = pos + 1;
              break
            } else {
              unclosed('string');
            }
          }
          escapePos = next;
          while (css.charCodeAt(escapePos - 1) === BACKSLASH) {
            escapePos -= 1;
            escaped = !escaped;
          }
        } while (escaped)

        currentToken = ['string', css.slice(pos, next + 1), pos, next];
        pos = next;
        break
      }

      case AT: {
        RE_AT_END.lastIndex = pos + 1;
        RE_AT_END.test(css);
        if (RE_AT_END.lastIndex === 0) {
          next = css.length - 1;
        } else {
          next = RE_AT_END.lastIndex - 2;
        }

        currentToken = ['at-word', css.slice(pos, next + 1), pos, next];

        pos = next;
        break
      }

      case BACKSLASH: {
        next = pos;
        escape = true;
        while (css.charCodeAt(next + 1) === BACKSLASH) {
          next += 1;
          escape = !escape;
        }
        code = css.charCodeAt(next + 1);
        if (
          escape &&
          code !== SLASH &&
          code !== SPACE &&
          code !== NEWLINE &&
          code !== TAB &&
          code !== CR &&
          code !== FEED
        ) {
          next += 1;
          if (RE_HEX_ESCAPE.test(css.charAt(next))) {
            while (RE_HEX_ESCAPE.test(css.charAt(next + 1))) {
              next += 1;
            }
            if (css.charCodeAt(next + 1) === SPACE) {
              next += 1;
            }
          }
        }

        currentToken = ['word', css.slice(pos, next + 1), pos, next];

        pos = next;
        break
      }

      default: {
        if (code === SLASH && css.charCodeAt(pos + 1) === ASTERISK) {
          next = css.indexOf('*/', pos + 2) + 1;
          if (next === 0) {
            if (ignore || ignoreUnclosed) {
              next = css.length;
            } else {
              unclosed('comment');
            }
          }

          currentToken = ['comment', css.slice(pos, next + 1), pos, next];
          pos = next;
        } else {
          RE_WORD_END.lastIndex = pos + 1;
          RE_WORD_END.test(css);
          if (RE_WORD_END.lastIndex === 0) {
            next = css.length - 1;
          } else {
            next = RE_WORD_END.lastIndex - 2;
          }

          currentToken = ['word', css.slice(pos, next + 1), pos, next];
          buffer.push(currentToken);
          pos = next;
        }

        break
      }
    }

    pos++;
    return currentToken
  }

  function back(token) {
    returned.push(token);
  }

  return {
    back,
    nextToken,
    endOfFile,
    position
  }
};

let Input;

function registerInput(dependant) {
  Input = dependant;
}

const HIGHLIGHT_THEME = {
  'brackets': picocolors.cyan,
  'at-word': picocolors.cyan,
  'comment': picocolors.gray,
  'string': picocolors.green,
  'class': picocolors.yellow,
  'hash': picocolors.magenta,
  'call': picocolors.cyan,
  '(': picocolors.cyan,
  ')': picocolors.cyan,
  '{': picocolors.yellow,
  '}': picocolors.yellow,
  '[': picocolors.yellow,
  ']': picocolors.yellow,
  ':': picocolors.yellow,
  ';': picocolors.yellow
};

function getTokenType([type, value], processor) {
  if (type === 'word') {
    if (value[0] === '.') {
      return 'class'
    }
    if (value[0] === '#') {
      return 'hash'
    }
  }

  if (!processor.endOfFile()) {
    let next = processor.nextToken();
    processor.back(next);
    if (next[0] === 'brackets' || next[0] === '(') return 'call'
  }

  return type
}

function terminalHighlight(css) {
  let processor = tokenize(new Input(css), { ignoreErrors: true });
  let result = '';
  while (!processor.endOfFile()) {
    let token = processor.nextToken();
    let color = HIGHLIGHT_THEME[getTokenType(token, processor)];
    if (color) {
      result += token[1]
        .split(/\r?\n/)
        .map(i => color(i))
        .join('\n');
    } else {
      result += token[1];
    }
  }
  return result
}

terminalHighlight.registerInput = registerInput;

var terminalHighlight_1 = terminalHighlight;

class CssSyntaxError extends Error {
  constructor(message, line, column, source, file, plugin) {
    super(message);
    this.name = 'CssSyntaxError';
    this.reason = message;

    if (file) {
      this.file = file;
    }
    if (source) {
      this.source = source;
    }
    if (plugin) {
      this.plugin = plugin;
    }
    if (typeof line !== 'undefined' && typeof column !== 'undefined') {
      if (typeof line === 'number') {
        this.line = line;
        this.column = column;
      } else {
        this.line = line.line;
        this.column = line.column;
        this.endLine = column.line;
        this.endColumn = column.column;
      }
    }

    this.setMessage();

    if (Error.captureStackTrace) {
      Error.captureStackTrace(this, CssSyntaxError);
    }
  }

  setMessage() {
    this.message = this.plugin ? this.plugin + ': ' : '';
    this.message += this.file ? this.file : '<css input>';
    if (typeof this.line !== 'undefined') {
      this.message += ':' + this.line + ':' + this.column;
    }
    this.message += ': ' + this.reason;
  }

  showSourceCode(color) {
    if (!this.source) return ''

    let css = this.source;
    if (color == null) color = picocolors.isColorSupported;
    if (terminalHighlight_1) {
      if (color) css = terminalHighlight_1(css);
    }

    let lines = css.split(/\r?\n/);
    let start = Math.max(this.line - 3, 0);
    let end = Math.min(this.line + 2, lines.length);

    let maxWidth = String(end).length;

    let mark, aside;
    if (color) {
      let { bold, red, gray } = picocolors.createColors(true);
      mark = text => bold(red(text));
      aside = text => gray(text);
    } else {
      mark = aside = str => str;
    }

    return lines
      .slice(start, end)
      .map((line, index) => {
        let number = start + 1 + index;
        let gutter = ' ' + (' ' + number).slice(-maxWidth) + ' | ';
        if (number === this.line) {
          let spacing =
            aside(gutter.replace(/\d/g, ' ')) +
            line.slice(0, this.column - 1).replace(/[^\t]/g, ' ');
          return mark('>') + aside(gutter) + line + '\n ' + spacing + mark('^')
        }
        return ' ' + aside(gutter) + line
      })
      .join('\n')
  }

  toString() {
    let code = this.showSourceCode();
    if (code) {
      code = '\n\n' + code + '\n';
    }
    return this.name + ': ' + this.message + code
  }
}

var cssSyntaxError = CssSyntaxError;
CssSyntaxError.default = CssSyntaxError;

var isClean = Symbol('isClean');

var my = Symbol('my');

var symbols = {
	isClean: isClean,
	my: my
};

const DEFAULT_RAW = {
  colon: ': ',
  indent: '    ',
  beforeDecl: '\n',
  beforeRule: '\n',
  beforeOpen: ' ',
  beforeClose: '\n',
  beforeComment: '\n',
  after: '\n',
  emptyBody: '',
  commentLeft: ' ',
  commentRight: ' ',
  semicolon: false
};

function capitalize$1(str) {
  return str[0].toUpperCase() + str.slice(1)
}

class Stringifier {
  constructor(builder) {
    this.builder = builder;
  }

  stringify(node, semicolon) {
    /* c8 ignore start */
    if (!this[node.type]) {
      throw new Error(
        'Unknown AST node type ' +
          node.type +
          '. ' +
          'Maybe you need to change PostCSS stringifier.'
      )
    }
    /* c8 ignore stop */
    this[node.type](node, semicolon);
  }

  document(node) {
    this.body(node);
  }

  root(node) {
    this.body(node);
    if (node.raws.after) this.builder(node.raws.after);
  }

  comment(node) {
    let left = this.raw(node, 'left', 'commentLeft');
    let right = this.raw(node, 'right', 'commentRight');
    this.builder('/*' + left + node.text + right + '*/', node);
  }

  decl(node, semicolon) {
    let between = this.raw(node, 'between', 'colon');
    let string = node.prop + between + this.rawValue(node, 'value');

    if (node.important) {
      string += node.raws.important || ' !important';
    }

    if (semicolon) string += ';';
    this.builder(string, node);
  }

  rule(node) {
    this.block(node, this.rawValue(node, 'selector'));
    if (node.raws.ownSemicolon) {
      this.builder(node.raws.ownSemicolon, node, 'end');
    }
  }

  atrule(node, semicolon) {
    let name = '@' + node.name;
    let params = node.params ? this.rawValue(node, 'params') : '';

    if (typeof node.raws.afterName !== 'undefined') {
      name += node.raws.afterName;
    } else if (params) {
      name += ' ';
    }

    if (node.nodes) {
      this.block(node, name + params);
    } else {
      let end = (node.raws.between || '') + (semicolon ? ';' : '');
      this.builder(name + params + end, node);
    }
  }

  body(node) {
    let last = node.nodes.length - 1;
    while (last > 0) {
      if (node.nodes[last].type !== 'comment') break
      last -= 1;
    }

    let semicolon = this.raw(node, 'semicolon');
    for (let i = 0; i < node.nodes.length; i++) {
      let child = node.nodes[i];
      let before = this.raw(child, 'before');
      if (before) this.builder(before);
      this.stringify(child, last !== i || semicolon);
    }
  }

  block(node, start) {
    let between = this.raw(node, 'between', 'beforeOpen');
    this.builder(start + between + '{', node, 'start');

    let after;
    if (node.nodes && node.nodes.length) {
      this.body(node);
      after = this.raw(node, 'after');
    } else {
      after = this.raw(node, 'after', 'emptyBody');
    }

    if (after) this.builder(after);
    this.builder('}', node, 'end');
  }

  raw(node, own, detect) {
    let value;
    if (!detect) detect = own;

    // Already had
    if (own) {
      value = node.raws[own];
      if (typeof value !== 'undefined') return value
    }

    let parent = node.parent;

    if (detect === 'before') {
      // Hack for first rule in CSS
      if (!parent || (parent.type === 'root' && parent.first === node)) {
        return ''
      }

      // `root` nodes in `document` should use only their own raws
      if (parent && parent.type === 'document') {
        return ''
      }
    }

    // Floating child without parent
    if (!parent) return DEFAULT_RAW[detect]

    // Detect style by other nodes
    let root = node.root();
    if (!root.rawCache) root.rawCache = {};
    if (typeof root.rawCache[detect] !== 'undefined') {
      return root.rawCache[detect]
    }

    if (detect === 'before' || detect === 'after') {
      return this.beforeAfter(node, detect)
    } else {
      let method = 'raw' + capitalize$1(detect);
      if (this[method]) {
        value = this[method](root, node);
      } else {
        root.walk(i => {
          value = i.raws[own];
          if (typeof value !== 'undefined') return false
        });
      }
    }

    if (typeof value === 'undefined') value = DEFAULT_RAW[detect];

    root.rawCache[detect] = value;
    return value
  }

  rawSemicolon(root) {
    let value;
    root.walk(i => {
      if (i.nodes && i.nodes.length && i.last.type === 'decl') {
        value = i.raws.semicolon;
        if (typeof value !== 'undefined') return false
      }
    });
    return value
  }

  rawEmptyBody(root) {
    let value;
    root.walk(i => {
      if (i.nodes && i.nodes.length === 0) {
        value = i.raws.after;
        if (typeof value !== 'undefined') return false
      }
    });
    return value
  }

  rawIndent(root) {
    if (root.raws.indent) return root.raws.indent
    let value;
    root.walk(i => {
      let p = i.parent;
      if (p && p !== root && p.parent && p.parent === root) {
        if (typeof i.raws.before !== 'undefined') {
          let parts = i.raws.before.split('\n');
          value = parts[parts.length - 1];
          value = value.replace(/\S/g, '');
          return false
        }
      }
    });
    return value
  }

  rawBeforeComment(root, node) {
    let value;
    root.walkComments(i => {
      if (typeof i.raws.before !== 'undefined') {
        value = i.raws.before;
        if (value.includes('\n')) {
          value = value.replace(/[^\n]+$/, '');
        }
        return false
      }
    });
    if (typeof value === 'undefined') {
      value = this.raw(node, null, 'beforeDecl');
    } else if (value) {
      value = value.replace(/\S/g, '');
    }
    return value
  }

  rawBeforeDecl(root, node) {
    let value;
    root.walkDecls(i => {
      if (typeof i.raws.before !== 'undefined') {
        value = i.raws.before;
        if (value.includes('\n')) {
          value = value.replace(/[^\n]+$/, '');
        }
        return false
      }
    });
    if (typeof value === 'undefined') {
      value = this.raw(node, null, 'beforeRule');
    } else if (value) {
      value = value.replace(/\S/g, '');
    }
    return value
  }

  rawBeforeRule(root) {
    let value;
    root.walk(i => {
      if (i.nodes && (i.parent !== root || root.first !== i)) {
        if (typeof i.raws.before !== 'undefined') {
          value = i.raws.before;
          if (value.includes('\n')) {
            value = value.replace(/[^\n]+$/, '');
          }
          return false
        }
      }
    });
    if (value) value = value.replace(/\S/g, '');
    return value
  }

  rawBeforeClose(root) {
    let value;
    root.walk(i => {
      if (i.nodes && i.nodes.length > 0) {
        if (typeof i.raws.after !== 'undefined') {
          value = i.raws.after;
          if (value.includes('\n')) {
            value = value.replace(/[^\n]+$/, '');
          }
          return false
        }
      }
    });
    if (value) value = value.replace(/\S/g, '');
    return value
  }

  rawBeforeOpen(root) {
    let value;
    root.walk(i => {
      if (i.type !== 'decl') {
        value = i.raws.between;
        if (typeof value !== 'undefined') return false
      }
    });
    return value
  }

  rawColon(root) {
    let value;
    root.walkDecls(i => {
      if (typeof i.raws.between !== 'undefined') {
        value = i.raws.between.replace(/[^\s:]/g, '');
        return false
      }
    });
    return value
  }

  beforeAfter(node, detect) {
    let value;
    if (node.type === 'decl') {
      value = this.raw(node, null, 'beforeDecl');
    } else if (node.type === 'comment') {
      value = this.raw(node, null, 'beforeComment');
    } else if (detect === 'before') {
      value = this.raw(node, null, 'beforeRule');
    } else {
      value = this.raw(node, null, 'beforeClose');
    }

    let buf = node.parent;
    let depth = 0;
    while (buf && buf.type !== 'root') {
      depth += 1;
      buf = buf.parent;
    }

    if (value.includes('\n')) {
      let indent = this.raw(node, null, 'indent');
      if (indent.length) {
        for (let step = 0; step < depth; step++) value += indent;
      }
    }

    return value
  }

  rawValue(node, prop) {
    let value = node[prop];
    let raw = node.raws[prop];
    if (raw && raw.value === value) {
      return raw.raw
    }

    return value
  }
}

var stringifier = Stringifier;
Stringifier.default = Stringifier;

function stringify$1(node, builder) {
  let str = new stringifier(builder);
  str.stringify(node);
}

var stringify_1 = stringify$1;
stringify$1.default = stringify$1;

let { isClean: isClean$1, my: my$1 } = symbols;




function cloneNode(obj, parent) {
  let cloned = new obj.constructor();

  for (let i in obj) {
    if (!Object.prototype.hasOwnProperty.call(obj, i)) {
      /* c8 ignore next 2 */
      continue
    }
    if (i === 'proxyCache') continue
    let value = obj[i];
    let type = typeof value;

    if (i === 'parent' && type === 'object') {
      if (parent) cloned[i] = parent;
    } else if (i === 'source') {
      cloned[i] = value;
    } else if (Array.isArray(value)) {
      cloned[i] = value.map(j => cloneNode(j, cloned));
    } else {
      if (type === 'object' && value !== null) value = cloneNode(value);
      cloned[i] = value;
    }
  }

  return cloned
}

class Node$1 {
  constructor(defaults = {}) {
    this.raws = {};
    this[isClean$1] = false;
    this[my$1] = true;

    for (let name in defaults) {
      if (name === 'nodes') {
        this.nodes = [];
        for (let node of defaults[name]) {
          if (typeof node.clone === 'function') {
            this.append(node.clone());
          } else {
            this.append(node);
          }
        }
      } else {
        this[name] = defaults[name];
      }
    }
  }

  error(message, opts = {}) {
    if (this.source) {
      let { start, end } = this.rangeBy(opts);
      return this.source.input.error(
        message,
        { line: start.line, column: start.column },
        { line: end.line, column: end.column },
        opts
      )
    }
    return new cssSyntaxError(message)
  }

  warn(result, text, opts) {
    let data = { node: this };
    for (let i in opts) data[i] = opts[i];
    return result.warn(text, data)
  }

  remove() {
    if (this.parent) {
      this.parent.removeChild(this);
    }
    this.parent = undefined;
    return this
  }

  toString(stringifier = stringify_1) {
    if (stringifier.stringify) stringifier = stringifier.stringify;
    let result = '';
    stringifier(this, i => {
      result += i;
    });
    return result
  }

  assign(overrides = {}) {
    for (let name in overrides) {
      this[name] = overrides[name];
    }
    return this
  }

  clone(overrides = {}) {
    let cloned = cloneNode(this);
    for (let name in overrides) {
      cloned[name] = overrides[name];
    }
    return cloned
  }

  cloneBefore(overrides = {}) {
    let cloned = this.clone(overrides);
    this.parent.insertBefore(this, cloned);
    return cloned
  }

  cloneAfter(overrides = {}) {
    let cloned = this.clone(overrides);
    this.parent.insertAfter(this, cloned);
    return cloned
  }

  replaceWith(...nodes) {
    if (this.parent) {
      let bookmark = this;
      let foundSelf = false;
      for (let node of nodes) {
        if (node === this) {
          foundSelf = true;
        } else if (foundSelf) {
          this.parent.insertAfter(bookmark, node);
          bookmark = node;
        } else {
          this.parent.insertBefore(bookmark, node);
        }
      }

      if (!foundSelf) {
        this.remove();
      }
    }

    return this
  }

  next() {
    if (!this.parent) return undefined
    let index = this.parent.index(this);
    return this.parent.nodes[index + 1]
  }

  prev() {
    if (!this.parent) return undefined
    let index = this.parent.index(this);
    return this.parent.nodes[index - 1]
  }

  before(add) {
    this.parent.insertBefore(this, add);
    return this
  }

  after(add) {
    this.parent.insertAfter(this, add);
    return this
  }

  root() {
    let result = this;
    while (result.parent && result.parent.type !== 'document') {
      result = result.parent;
    }
    return result
  }

  raw(prop, defaultType) {
    let str = new stringifier();
    return str.raw(this, prop, defaultType)
  }

  cleanRaws(keepBetween) {
    delete this.raws.before;
    delete this.raws.after;
    if (!keepBetween) delete this.raws.between;
  }

  toJSON(_, inputs) {
    let fixed = {};
    let emitInputs = inputs == null;
    inputs = inputs || new Map();
    let inputsNextIndex = 0;

    for (let name in this) {
      if (!Object.prototype.hasOwnProperty.call(this, name)) {
        /* c8 ignore next 2 */
        continue
      }
      if (name === 'parent' || name === 'proxyCache') continue
      let value = this[name];

      if (Array.isArray(value)) {
        fixed[name] = value.map(i => {
          if (typeof i === 'object' && i.toJSON) {
            return i.toJSON(null, inputs)
          } else {
            return i
          }
        });
      } else if (typeof value === 'object' && value.toJSON) {
        fixed[name] = value.toJSON(null, inputs);
      } else if (name === 'source') {
        let inputId = inputs.get(value.input);
        if (inputId == null) {
          inputId = inputsNextIndex;
          inputs.set(value.input, inputsNextIndex);
          inputsNextIndex++;
        }
        fixed[name] = {
          inputId,
          start: value.start,
          end: value.end
        };
      } else {
        fixed[name] = value;
      }
    }

    if (emitInputs) {
      fixed.inputs = [...inputs.keys()].map(input => input.toJSON());
    }

    return fixed
  }

  positionInside(index) {
    let string = this.toString();
    let column = this.source.start.column;
    let line = this.source.start.line;

    for (let i = 0; i < index; i++) {
      if (string[i] === '\n') {
        column = 1;
        line += 1;
      } else {
        column += 1;
      }
    }

    return { line, column }
  }

  positionBy(opts) {
    let pos = this.source.start;
    if (opts.index) {
      pos = this.positionInside(opts.index);
    } else if (opts.word) {
      let index = this.toString().indexOf(opts.word);
      if (index !== -1) pos = this.positionInside(index);
    }
    return pos
  }

  rangeBy(opts) {
    let start = {
      line: this.source.start.line,
      column: this.source.start.column
    };
    let end = this.source.end
      ? {
          line: this.source.end.line,
          column: this.source.end.column + 1
        }
      : {
          line: start.line,
          column: start.column + 1
        };

    if (opts.word) {
      let index = this.toString().indexOf(opts.word);
      if (index !== -1) {
        start = this.positionInside(index);
        end = this.positionInside(index + opts.word.length);
      }
    } else {
      if (opts.start) {
        start = {
          line: opts.start.line,
          column: opts.start.column
        };
      } else if (opts.index) {
        start = this.positionInside(opts.index);
      }

      if (opts.end) {
        end = {
          line: opts.end.line,
          column: opts.end.column
        };
      } else if (opts.endIndex) {
        end = this.positionInside(opts.endIndex);
      } else if (opts.index) {
        end = this.positionInside(opts.index + 1);
      }
    }

    if (
      end.line < start.line ||
      (end.line === start.line && end.column <= start.column)
    ) {
      end = { line: start.line, column: start.column + 1 };
    }

    return { start, end }
  }

  getProxyProcessor() {
    return {
      set(node, prop, value) {
        if (node[prop] === value) return true
        node[prop] = value;
        if (
          prop === 'prop' ||
          prop === 'value' ||
          prop === 'name' ||
          prop === 'params' ||
          prop === 'important' ||
          /* c8 ignore next */
          prop === 'text'
        ) {
          node.markDirty();
        }
        return true
      },

      get(node, prop) {
        if (prop === 'proxyOf') {
          return node
        } else if (prop === 'root') {
          return () => node.root().toProxy()
        } else {
          return node[prop]
        }
      }
    }
  }

  toProxy() {
    if (!this.proxyCache) {
      this.proxyCache = new Proxy(this, this.getProxyProcessor());
    }
    return this.proxyCache
  }

  addToError(error) {
    error.postcssNode = this;
    if (error.stack && this.source && /\n\s{4}at /.test(error.stack)) {
      let s = this.source;
      error.stack = error.stack.replace(
        /\n\s{4}at /,
        `$&${s.input.from}:${s.start.line}:${s.start.column}$&`
      );
    }
    return error
  }

  markDirty() {
    if (this[isClean$1]) {
      this[isClean$1] = false;
      let next = this;
      while ((next = next.parent)) {
        next[isClean$1] = false;
      }
    }
  }

  get proxyOf() {
    return this
  }
}

var node_1 = Node$1;
Node$1.default = Node$1;

class Declaration extends node_1 {
  constructor(defaults) {
    if (
      defaults &&
      typeof defaults.value !== 'undefined' &&
      typeof defaults.value !== 'string'
    ) {
      defaults = { ...defaults, value: String(defaults.value) };
    }
    super(defaults);
    this.type = 'decl';
  }

  get variable() {
    return this.prop.startsWith('--') || this.prop[0] === '$'
  }
}

var declaration = Declaration;
Declaration.default = Declaration;

/* -*- Mode: js; js-indent-level: 2; -*- */
/*
 * Copyright 2011 Mozilla Foundation and contributors
 * Licensed under the New BSD license. See LICENSE or:
 * http://opensource.org/licenses/BSD-3-Clause
 */

var intToCharMap$1 = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'.split('');

/**
 * Encode an integer in the range of 0 to 63 to a single base 64 digit.
 */
var encode$4 = function (number) {
  if (0 <= number && number < intToCharMap$1.length) {
    return intToCharMap$1[number];
  }
  throw new TypeError("Must be between 0 and 63: " + number);
};

/**
 * Decode a single base 64 character code digit to an integer. Returns -1 on
 * failure.
 */
var decode$2 = function (charCode) {
  var bigA = 65;     // 'A'
  var bigZ = 90;     // 'Z'

  var littleA = 97;  // 'a'
  var littleZ = 122; // 'z'

  var zero = 48;     // '0'
  var nine = 57;     // '9'

  var plus = 43;     // '+'
  var slash = 47;    // '/'

  var littleOffset = 26;
  var numberOffset = 52;

  // 0 - 25: ABCDEFGHIJKLMNOPQRSTUVWXYZ
  if (bigA <= charCode && charCode <= bigZ) {
    return (charCode - bigA);
  }

  // 26 - 51: abcdefghijklmnopqrstuvwxyz
  if (littleA <= charCode && charCode <= littleZ) {
    return (charCode - littleA + littleOffset);
  }

  // 52 - 61: 0123456789
  if (zero <= charCode && charCode <= nine) {
    return (charCode - zero + numberOffset);
  }

  // 62: +
  if (charCode == plus) {
    return 62;
  }

  // 63: /
  if (charCode == slash) {
    return 63;
  }

  // Invalid base64 digit.
  return -1;
};

var base64$1 = {
	encode: encode$4,
	decode: decode$2
};

/* -*- Mode: js; js-indent-level: 2; -*- */

/*
 * Copyright 2011 Mozilla Foundation and contributors
 * Licensed under the New BSD license. See LICENSE or:
 * http://opensource.org/licenses/BSD-3-Clause
 *
 * Based on the Base 64 VLQ implementation in Closure Compiler:
 * https://code.google.com/p/closure-compiler/source/browse/trunk/src/com/google/debugging/sourcemap/Base64VLQ.java
 *
 * Copyright 2011 The Closure Compiler Authors. All rights reserved.
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *  * Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above
 *    copyright notice, this list of conditions and the following
 *    disclaimer in the documentation and/or other materials provided
 *    with the distribution.
 *  * Neither the name of Google Inc. nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */



// A single base 64 digit can contain 6 bits of data. For the base 64 variable
// length quantities we use in the source map spec, the first bit is the sign,
// the next four bits are the actual value, and the 6th bit is the
// continuation bit. The continuation bit tells us whether there are more
// digits in this value following this digit.
//
//   Continuation
//   |    Sign
//   |    |
//   V    V
//   101011

var VLQ_BASE_SHIFT$1 = 5;

// binary: 100000
var VLQ_BASE$1 = 1 << VLQ_BASE_SHIFT$1;

// binary: 011111
var VLQ_BASE_MASK$1 = VLQ_BASE$1 - 1;

// binary: 100000
var VLQ_CONTINUATION_BIT$1 = VLQ_BASE$1;

/**
 * Converts from a two-complement value to a value where the sign bit is
 * placed in the least significant bit.  For example, as decimals:
 *   1 becomes 2 (10 binary), -1 becomes 3 (11 binary)
 *   2 becomes 4 (100 binary), -2 becomes 5 (101 binary)
 */
function toVLQSigned$1(aValue) {
  return aValue < 0
    ? ((-aValue) << 1) + 1
    : (aValue << 1) + 0;
}

/**
 * Converts to a two-complement value from a value where the sign bit is
 * placed in the least significant bit.  For example, as decimals:
 *   2 (10 binary) becomes 1, 3 (11 binary) becomes -1
 *   4 (100 binary) becomes 2, 5 (101 binary) becomes -2
 */
function fromVLQSigned$1(aValue) {
  var isNegative = (aValue & 1) === 1;
  var shifted = aValue >> 1;
  return isNegative
    ? -shifted
    : shifted;
}

/**
 * Returns the base 64 VLQ encoded value.
 */
var encode$5 = function base64VLQ_encode(aValue) {
  var encoded = "";
  var digit;

  var vlq = toVLQSigned$1(aValue);

  do {
    digit = vlq & VLQ_BASE_MASK$1;
    vlq >>>= VLQ_BASE_SHIFT$1;
    if (vlq > 0) {
      // There are still more digits in this value, so we must make sure the
      // continuation bit is marked.
      digit |= VLQ_CONTINUATION_BIT$1;
    }
    encoded += base64$1.encode(digit);
  } while (vlq > 0);

  return encoded;
};

/**
 * Decodes the next base 64 VLQ value from the given string and returns the
 * value and the rest of the string via the out parameter.
 */
var decode$3 = function base64VLQ_decode(aStr, aIndex, aOutParam) {
  var strLen = aStr.length;
  var result = 0;
  var shift = 0;
  var continuation, digit;

  do {
    if (aIndex >= strLen) {
      throw new Error("Expected more digits in base 64 VLQ value.");
    }

    digit = base64$1.decode(aStr.charCodeAt(aIndex++));
    if (digit === -1) {
      throw new Error("Invalid base64 digit: " + aStr.charAt(aIndex - 1));
    }

    continuation = !!(digit & VLQ_CONTINUATION_BIT$1);
    digit &= VLQ_BASE_MASK$1;
    result = result + (digit << shift);
    shift += VLQ_BASE_SHIFT$1;
  } while (continuation);

  aOutParam.value = fromVLQSigned$1(result);
  aOutParam.rest = aIndex;
};

var base64Vlq$1 = {
	encode: encode$5,
	decode: decode$3
};

/* -*- Mode: js; js-indent-level: 2; -*- */

var util$1 = createCommonjsModule(function (module, exports) {
/*
 * Copyright 2011 Mozilla Foundation and contributors
 * Licensed under the New BSD license. See LICENSE or:
 * http://opensource.org/licenses/BSD-3-Clause
 */

/**
 * This is a helper function for getting values from parameter/options
 * objects.
 *
 * @param args The object we are extracting values from
 * @param name The name of the property we are getting.
 * @param defaultValue An optional value to return if the property is missing
 * from the object. If this is not specified and the property is missing, an
 * error will be thrown.
 */
function getArg(aArgs, aName, aDefaultValue) {
  if (aName in aArgs) {
    return aArgs[aName];
  } else if (arguments.length === 3) {
    return aDefaultValue;
  } else {
    throw new Error('"' + aName + '" is a required argument.');
  }
}
exports.getArg = getArg;

var urlRegexp = /^(?:([\w+\-.]+):)?\/\/(?:(\w+:\w+)@)?([\w.-]*)(?::(\d+))?(.*)$/;
var dataUrlRegexp = /^data:.+\,.+$/;

function urlParse(aUrl) {
  var match = aUrl.match(urlRegexp);
  if (!match) {
    return null;
  }
  return {
    scheme: match[1],
    auth: match[2],
    host: match[3],
    port: match[4],
    path: match[5]
  };
}
exports.urlParse = urlParse;

function urlGenerate(aParsedUrl) {
  var url = '';
  if (aParsedUrl.scheme) {
    url += aParsedUrl.scheme + ':';
  }
  url += '//';
  if (aParsedUrl.auth) {
    url += aParsedUrl.auth + '@';
  }
  if (aParsedUrl.host) {
    url += aParsedUrl.host;
  }
  if (aParsedUrl.port) {
    url += ":" + aParsedUrl.port;
  }
  if (aParsedUrl.path) {
    url += aParsedUrl.path;
  }
  return url;
}
exports.urlGenerate = urlGenerate;

var MAX_CACHED_INPUTS = 32;

/**
 * Takes some function `f(input) -> result` and returns a memoized version of
 * `f`.
 *
 * We keep at most `MAX_CACHED_INPUTS` memoized results of `f` alive. The
 * memoization is a dumb-simple, linear least-recently-used cache.
 */
function lruMemoize(f) {
  var cache = [];

  return function(input) {
    for (var i = 0; i < cache.length; i++) {
      if (cache[i].input === input) {
        var temp = cache[0];
        cache[0] = cache[i];
        cache[i] = temp;
        return cache[0].result;
      }
    }

    var result = f(input);

    cache.unshift({
      input,
      result,
    });

    if (cache.length > MAX_CACHED_INPUTS) {
      cache.pop();
    }

    return result;
  };
}

/**
 * Normalizes a path, or the path portion of a URL:
 *
 * - Replaces consecutive slashes with one slash.
 * - Removes unnecessary '.' parts.
 * - Removes unnecessary '<dir>/..' parts.
 *
 * Based on code in the Node.js 'path' core module.
 *
 * @param aPath The path or url to normalize.
 */
var normalize = lruMemoize(function normalize(aPath) {
  var path = aPath;
  var url = urlParse(aPath);
  if (url) {
    if (!url.path) {
      return aPath;
    }
    path = url.path;
  }
  var isAbsolute = exports.isAbsolute(path);
  // Split the path into parts between `/` characters. This is much faster than
  // using `.split(/\/+/g)`.
  var parts = [];
  var start = 0;
  var i = 0;
  while (true) {
    start = i;
    i = path.indexOf("/", start);
    if (i === -1) {
      parts.push(path.slice(start));
      break;
    } else {
      parts.push(path.slice(start, i));
      while (i < path.length && path[i] === "/") {
        i++;
      }
    }
  }

  for (var part, up = 0, i = parts.length - 1; i >= 0; i--) {
    part = parts[i];
    if (part === '.') {
      parts.splice(i, 1);
    } else if (part === '..') {
      up++;
    } else if (up > 0) {
      if (part === '') {
        // The first part is blank if the path is absolute. Trying to go
        // above the root is a no-op. Therefore we can remove all '..' parts
        // directly after the root.
        parts.splice(i + 1, up);
        up = 0;
      } else {
        parts.splice(i, 2);
        up--;
      }
    }
  }
  path = parts.join('/');

  if (path === '') {
    path = isAbsolute ? '/' : '.';
  }

  if (url) {
    url.path = path;
    return urlGenerate(url);
  }
  return path;
});
exports.normalize = normalize;

/**
 * Joins two paths/URLs.
 *
 * @param aRoot The root path or URL.
 * @param aPath The path or URL to be joined with the root.
 *
 * - If aPath is a URL or a data URI, aPath is returned, unless aPath is a
 *   scheme-relative URL: Then the scheme of aRoot, if any, is prepended
 *   first.
 * - Otherwise aPath is a path. If aRoot is a URL, then its path portion
 *   is updated with the result and aRoot is returned. Otherwise the result
 *   is returned.
 *   - If aPath is absolute, the result is aPath.
 *   - Otherwise the two paths are joined with a slash.
 * - Joining for example 'http://' and 'www.example.com' is also supported.
 */
function join(aRoot, aPath) {
  if (aRoot === "") {
    aRoot = ".";
  }
  if (aPath === "") {
    aPath = ".";
  }
  var aPathUrl = urlParse(aPath);
  var aRootUrl = urlParse(aRoot);
  if (aRootUrl) {
    aRoot = aRootUrl.path || '/';
  }

  // `join(foo, '//www.example.org')`
  if (aPathUrl && !aPathUrl.scheme) {
    if (aRootUrl) {
      aPathUrl.scheme = aRootUrl.scheme;
    }
    return urlGenerate(aPathUrl);
  }

  if (aPathUrl || aPath.match(dataUrlRegexp)) {
    return aPath;
  }

  // `join('http://', 'www.example.com')`
  if (aRootUrl && !aRootUrl.host && !aRootUrl.path) {
    aRootUrl.host = aPath;
    return urlGenerate(aRootUrl);
  }

  var joined = aPath.charAt(0) === '/'
    ? aPath
    : normalize(aRoot.replace(/\/+$/, '') + '/' + aPath);

  if (aRootUrl) {
    aRootUrl.path = joined;
    return urlGenerate(aRootUrl);
  }
  return joined;
}
exports.join = join;

exports.isAbsolute = function (aPath) {
  return aPath.charAt(0) === '/' || urlRegexp.test(aPath);
};

/**
 * Make a path relative to a URL or another path.
 *
 * @param aRoot The root path or URL.
 * @param aPath The path or URL to be made relative to aRoot.
 */
function relative(aRoot, aPath) {
  if (aRoot === "") {
    aRoot = ".";
  }

  aRoot = aRoot.replace(/\/$/, '');

  // It is possible for the path to be above the root. In this case, simply
  // checking whether the root is a prefix of the path won't work. Instead, we
  // need to remove components from the root one by one, until either we find
  // a prefix that fits, or we run out of components to remove.
  var level = 0;
  while (aPath.indexOf(aRoot + '/') !== 0) {
    var index = aRoot.lastIndexOf("/");
    if (index < 0) {
      return aPath;
    }

    // If the only part of the root that is left is the scheme (i.e. http://,
    // file:///, etc.), one or more slashes (/), or simply nothing at all, we
    // have exhausted all components, so the path is not relative to the root.
    aRoot = aRoot.slice(0, index);
    if (aRoot.match(/^([^\/]+:\/)?\/*$/)) {
      return aPath;
    }

    ++level;
  }

  // Make sure we add a "../" for each component we removed from the root.
  return Array(level + 1).join("../") + aPath.substr(aRoot.length + 1);
}
exports.relative = relative;

var supportsNullProto = (function () {
  var obj = Object.create(null);
  return !('__proto__' in obj);
}());

function identity (s) {
  return s;
}

/**
 * Because behavior goes wacky when you set `__proto__` on objects, we
 * have to prefix all the strings in our set with an arbitrary character.
 *
 * See https://github.com/mozilla/source-map/pull/31 and
 * https://github.com/mozilla/source-map/issues/30
 *
 * @param String aStr
 */
function toSetString(aStr) {
  if (isProtoString(aStr)) {
    return '$' + aStr;
  }

  return aStr;
}
exports.toSetString = supportsNullProto ? identity : toSetString;

function fromSetString(aStr) {
  if (isProtoString(aStr)) {
    return aStr.slice(1);
  }

  return aStr;
}
exports.fromSetString = supportsNullProto ? identity : fromSetString;

function isProtoString(s) {
  if (!s) {
    return false;
  }

  var length = s.length;

  if (length < 9 /* "__proto__".length */) {
    return false;
  }

  if (s.charCodeAt(length - 1) !== 95  /* '_' */ ||
      s.charCodeAt(length - 2) !== 95  /* '_' */ ||
      s.charCodeAt(length - 3) !== 111 /* 'o' */ ||
      s.charCodeAt(length - 4) !== 116 /* 't' */ ||
      s.charCodeAt(length - 5) !== 111 /* 'o' */ ||
      s.charCodeAt(length - 6) !== 114 /* 'r' */ ||
      s.charCodeAt(length - 7) !== 112 /* 'p' */ ||
      s.charCodeAt(length - 8) !== 95  /* '_' */ ||
      s.charCodeAt(length - 9) !== 95  /* '_' */) {
    return false;
  }

  for (var i = length - 10; i >= 0; i--) {
    if (s.charCodeAt(i) !== 36 /* '$' */) {
      return false;
    }
  }

  return true;
}

/**
 * Comparator between two mappings where the original positions are compared.
 *
 * Optionally pass in `true` as `onlyCompareGenerated` to consider two
 * mappings with the same original source/line/column, but different generated
 * line and column the same. Useful when searching for a mapping with a
 * stubbed out mapping.
 */
function compareByOriginalPositions(mappingA, mappingB, onlyCompareOriginal) {
  var cmp = strcmp(mappingA.source, mappingB.source);
  if (cmp !== 0) {
    return cmp;
  }

  cmp = mappingA.originalLine - mappingB.originalLine;
  if (cmp !== 0) {
    return cmp;
  }

  cmp = mappingA.originalColumn - mappingB.originalColumn;
  if (cmp !== 0 || onlyCompareOriginal) {
    return cmp;
  }

  cmp = mappingA.generatedColumn - mappingB.generatedColumn;
  if (cmp !== 0) {
    return cmp;
  }

  cmp = mappingA.generatedLine - mappingB.generatedLine;
  if (cmp !== 0) {
    return cmp;
  }

  return strcmp(mappingA.name, mappingB.name);
}
exports.compareByOriginalPositions = compareByOriginalPositions;

function compareByOriginalPositionsNoSource(mappingA, mappingB, onlyCompareOriginal) {
  var cmp;

  cmp = mappingA.originalLine - mappingB.originalLine;
  if (cmp !== 0) {
    return cmp;
  }

  cmp = mappingA.originalColumn - mappingB.originalColumn;
  if (cmp !== 0 || onlyCompareOriginal) {
    return cmp;
  }

  cmp = mappingA.generatedColumn - mappingB.generatedColumn;
  if (cmp !== 0) {
    return cmp;
  }

  cmp = mappingA.generatedLine - mappingB.generatedLine;
  if (cmp !== 0) {
    return cmp;
  }

  return strcmp(mappingA.name, mappingB.name);
}
exports.compareByOriginalPositionsNoSource = compareByOriginalPositionsNoSource;

/**
 * Comparator between two mappings with deflated source and name indices where
 * the generated positions are compared.
 *
 * Optionally pass in `true` as `onlyCompareGenerated` to consider two
 * mappings with the same generated line and column, but different
 * source/name/original line and column the same. Useful when searching for a
 * mapping with a stubbed out mapping.
 */
function compareByGeneratedPositionsDeflated(mappingA, mappingB, onlyCompareGenerated) {
  var cmp = mappingA.generatedLine - mappingB.generatedLine;
  if (cmp !== 0) {
    return cmp;
  }

  cmp = mappingA.generatedColumn - mappingB.generatedColumn;
  if (cmp !== 0 || onlyCompareGenerated) {
    return cmp;
  }

  cmp = strcmp(mappingA.source, mappingB.source);
  if (cmp !== 0) {
    return cmp;
  }

  cmp = mappingA.originalLine - mappingB.originalLine;
  if (cmp !== 0) {
    return cmp;
  }

  cmp = mappingA.originalColumn - mappingB.originalColumn;
  if (cmp !== 0) {
    return cmp;
  }

  return strcmp(mappingA.name, mappingB.name);
}
exports.compareByGeneratedPositionsDeflated = compareByGeneratedPositionsDeflated;

function compareByGeneratedPositionsDeflatedNoLine(mappingA, mappingB, onlyCompareGenerated) {
  var cmp = mappingA.generatedColumn - mappingB.generatedColumn;
  if (cmp !== 0 || onlyCompareGenerated) {
    return cmp;
  }

  cmp = strcmp(mappingA.source, mappingB.source);
  if (cmp !== 0) {
    return cmp;
  }

  cmp = mappingA.originalLine - mappingB.originalLine;
  if (cmp !== 0) {
    return cmp;
  }

  cmp = mappingA.originalColumn - mappingB.originalColumn;
  if (cmp !== 0) {
    return cmp;
  }

  return strcmp(mappingA.name, mappingB.name);
}
exports.compareByGeneratedPositionsDeflatedNoLine = compareByGeneratedPositionsDeflatedNoLine;

function strcmp(aStr1, aStr2) {
  if (aStr1 === aStr2) {
    return 0;
  }

  if (aStr1 === null) {
    return 1; // aStr2 !== null
  }

  if (aStr2 === null) {
    return -1; // aStr1 !== null
  }

  if (aStr1 > aStr2) {
    return 1;
  }

  return -1;
}

/**
 * Comparator between two mappings with inflated source and name strings where
 * the generated positions are compared.
 */
function compareByGeneratedPositionsInflated(mappingA, mappingB) {
  var cmp = mappingA.generatedLine - mappingB.generatedLine;
  if (cmp !== 0) {
    return cmp;
  }

  cmp = mappingA.generatedColumn - mappingB.generatedColumn;
  if (cmp !== 0) {
    return cmp;
  }

  cmp = strcmp(mappingA.source, mappingB.source);
  if (cmp !== 0) {
    return cmp;
  }

  cmp = mappingA.originalLine - mappingB.originalLine;
  if (cmp !== 0) {
    return cmp;
  }

  cmp = mappingA.originalColumn - mappingB.originalColumn;
  if (cmp !== 0) {
    return cmp;
  }

  return strcmp(mappingA.name, mappingB.name);
}
exports.compareByGeneratedPositionsInflated = compareByGeneratedPositionsInflated;

/**
 * Strip any JSON XSSI avoidance prefix from the string (as documented
 * in the source maps specification), and then parse the string as
 * JSON.
 */
function parseSourceMapInput(str) {
  return JSON.parse(str.replace(/^\)]}'[^\n]*\n/, ''));
}
exports.parseSourceMapInput = parseSourceMapInput;

/**
 * Compute the URL of a source given the the source root, the source's
 * URL, and the source map's URL.
 */
function computeSourceURL(sourceRoot, sourceURL, sourceMapURL) {
  sourceURL = sourceURL || '';

  if (sourceRoot) {
    // This follows what Chrome does.
    if (sourceRoot[sourceRoot.length - 1] !== '/' && sourceURL[0] !== '/') {
      sourceRoot += '/';
    }
    // The spec says:
    //   Line 4: An optional source root, useful for relocating source
    //   files on a server or removing repeated values in the
    //   “sources” entry.  This value is prepended to the individual
    //   entries in the “source” field.
    sourceURL = sourceRoot + sourceURL;
  }

  // Historically, SourceMapConsumer did not take the sourceMapURL as
  // a parameter.  This mode is still somewhat supported, which is why
  // this code block is conditional.  However, it's preferable to pass
  // the source map URL to SourceMapConsumer, so that this function
  // can implement the source URL resolution algorithm as outlined in
  // the spec.  This block is basically the equivalent of:
  //    new URL(sourceURL, sourceMapURL).toString()
  // ... except it avoids using URL, which wasn't available in the
  // older releases of node still supported by this library.
  //
  // The spec says:
  //   If the sources are not absolute URLs after prepending of the
  //   “sourceRoot”, the sources are resolved relative to the
  //   SourceMap (like resolving script src in a html document).
  if (sourceMapURL) {
    var parsed = urlParse(sourceMapURL);
    if (!parsed) {
      throw new Error("sourceMapURL could not be parsed");
    }
    if (parsed.path) {
      // Strip the last path component, but keep the "/".
      var index = parsed.path.lastIndexOf('/');
      if (index >= 0) {
        parsed.path = parsed.path.substring(0, index + 1);
      }
    }
    sourceURL = join(urlGenerate(parsed), sourceURL);
  }

  return normalize(sourceURL);
}
exports.computeSourceURL = computeSourceURL;
});

/* -*- Mode: js; js-indent-level: 2; -*- */

/*
 * Copyright 2011 Mozilla Foundation and contributors
 * Licensed under the New BSD license. See LICENSE or:
 * http://opensource.org/licenses/BSD-3-Clause
 */


var has$1 = Object.prototype.hasOwnProperty;
var hasNativeMap$1 = typeof Map !== "undefined";

/**
 * A data structure which is a combination of an array and a set. Adding a new
 * member is O(1), testing for membership is O(1), and finding the index of an
 * element is O(1). Removing elements from the set is not supported. Only
 * strings are supported for membership.
 */
function ArraySet$3() {
  this._array = [];
  this._set = hasNativeMap$1 ? new Map() : Object.create(null);
}

/**
 * Static method for creating ArraySet instances from an existing array.
 */
ArraySet$3.fromArray = function ArraySet_fromArray(aArray, aAllowDuplicates) {
  var set = new ArraySet$3();
  for (var i = 0, len = aArray.length; i < len; i++) {
    set.add(aArray[i], aAllowDuplicates);
  }
  return set;
};

/**
 * Return how many unique items are in this ArraySet. If duplicates have been
 * added, than those do not count towards the size.
 *
 * @returns Number
 */
ArraySet$3.prototype.size = function ArraySet_size() {
  return hasNativeMap$1 ? this._set.size : Object.getOwnPropertyNames(this._set).length;
};

/**
 * Add the given string to this set.
 *
 * @param String aStr
 */
ArraySet$3.prototype.add = function ArraySet_add(aStr, aAllowDuplicates) {
  var sStr = hasNativeMap$1 ? aStr : util$1.toSetString(aStr);
  var isDuplicate = hasNativeMap$1 ? this.has(aStr) : has$1.call(this._set, sStr);
  var idx = this._array.length;
  if (!isDuplicate || aAllowDuplicates) {
    this._array.push(aStr);
  }
  if (!isDuplicate) {
    if (hasNativeMap$1) {
      this._set.set(aStr, idx);
    } else {
      this._set[sStr] = idx;
    }
  }
};

/**
 * Is the given string a member of this set?
 *
 * @param String aStr
 */
ArraySet$3.prototype.has = function ArraySet_has(aStr) {
  if (hasNativeMap$1) {
    return this._set.has(aStr);
  } else {
    var sStr = util$1.toSetString(aStr);
    return has$1.call(this._set, sStr);
  }
};

/**
 * What is the index of the given string in the array?
 *
 * @param String aStr
 */
ArraySet$3.prototype.indexOf = function ArraySet_indexOf(aStr) {
  if (hasNativeMap$1) {
    var idx = this._set.get(aStr);
    if (idx >= 0) {
        return idx;
    }
  } else {
    var sStr = util$1.toSetString(aStr);
    if (has$1.call(this._set, sStr)) {
      return this._set[sStr];
    }
  }

  throw new Error('"' + aStr + '" is not in the set.');
};

/**
 * What is the element at the given index?
 *
 * @param Number aIdx
 */
ArraySet$3.prototype.at = function ArraySet_at(aIdx) {
  if (aIdx >= 0 && aIdx < this._array.length) {
    return this._array[aIdx];
  }
  throw new Error('No element indexed by ' + aIdx);
};

/**
 * Returns the array representation of this set (which has the proper indices
 * indicated by indexOf). Note that this is a copy of the internal array used
 * for storing the members so that no one can mess with internal state.
 */
ArraySet$3.prototype.toArray = function ArraySet_toArray() {
  return this._array.slice();
};

var ArraySet_1$1 = ArraySet$3;

var arraySet$1 = {
	ArraySet: ArraySet_1$1
};

/* -*- Mode: js; js-indent-level: 2; -*- */

/*
 * Copyright 2014 Mozilla Foundation and contributors
 * Licensed under the New BSD license. See LICENSE or:
 * http://opensource.org/licenses/BSD-3-Clause
 */



/**
 * Determine whether mappingB is after mappingA with respect to generated
 * position.
 */
function generatedPositionAfter$1(mappingA, mappingB) {
  // Optimized for most common case
  var lineA = mappingA.generatedLine;
  var lineB = mappingB.generatedLine;
  var columnA = mappingA.generatedColumn;
  var columnB = mappingB.generatedColumn;
  return lineB > lineA || lineB == lineA && columnB >= columnA ||
         util$1.compareByGeneratedPositionsInflated(mappingA, mappingB) <= 0;
}

/**
 * A data structure to provide a sorted view of accumulated mappings in a
 * performance conscious manner. It trades a neglibable overhead in general
 * case for a large speedup in case of mappings being added in order.
 */
function MappingList$2() {
  this._array = [];
  this._sorted = true;
  // Serves as infimum
  this._last = {generatedLine: -1, generatedColumn: 0};
}

/**
 * Iterate through internal items. This method takes the same arguments that
 * `Array.prototype.forEach` takes.
 *
 * NOTE: The order of the mappings is NOT guaranteed.
 */
MappingList$2.prototype.unsortedForEach =
  function MappingList_forEach(aCallback, aThisArg) {
    this._array.forEach(aCallback, aThisArg);
  };

/**
 * Add the given source mapping.
 *
 * @param Object aMapping
 */
MappingList$2.prototype.add = function MappingList_add(aMapping) {
  if (generatedPositionAfter$1(this._last, aMapping)) {
    this._last = aMapping;
    this._array.push(aMapping);
  } else {
    this._sorted = false;
    this._array.push(aMapping);
  }
};

/**
 * Returns the flat, sorted array of mappings. The mappings are sorted by
 * generated position.
 *
 * WARNING: This method returns internal data without copying, for
 * performance. The return value must NOT be mutated, and should be treated as
 * an immutable borrow. If you want to take ownership, you must make your own
 * copy.
 */
MappingList$2.prototype.toArray = function MappingList_toArray() {
  if (!this._sorted) {
    this._array.sort(util$1.compareByGeneratedPositionsInflated);
    this._sorted = true;
  }
  return this._array;
};

var MappingList_1$1 = MappingList$2;

var mappingList$1 = {
	MappingList: MappingList_1$1
};

/* -*- Mode: js; js-indent-level: 2; -*- */

/*
 * Copyright 2011 Mozilla Foundation and contributors
 * Licensed under the New BSD license. See LICENSE or:
 * http://opensource.org/licenses/BSD-3-Clause
 */



var ArraySet$4 = arraySet$1.ArraySet;
var MappingList$3 = mappingList$1.MappingList;

/**
 * An instance of the SourceMapGenerator represents a source map which is
 * being built incrementally. You may pass an object with the following
 * properties:
 *
 *   - file: The filename of the generated source.
 *   - sourceRoot: A root for all relative URLs in this source map.
 */
function SourceMapGenerator$3(aArgs) {
  if (!aArgs) {
    aArgs = {};
  }
  this._file = util$1.getArg(aArgs, 'file', null);
  this._sourceRoot = util$1.getArg(aArgs, 'sourceRoot', null);
  this._skipValidation = util$1.getArg(aArgs, 'skipValidation', false);
  this._sources = new ArraySet$4();
  this._names = new ArraySet$4();
  this._mappings = new MappingList$3();
  this._sourcesContents = null;
}

SourceMapGenerator$3.prototype._version = 3;

/**
 * Creates a new SourceMapGenerator based on a SourceMapConsumer
 *
 * @param aSourceMapConsumer The SourceMap.
 */
SourceMapGenerator$3.fromSourceMap =
  function SourceMapGenerator_fromSourceMap(aSourceMapConsumer) {
    var sourceRoot = aSourceMapConsumer.sourceRoot;
    var generator = new SourceMapGenerator$3({
      file: aSourceMapConsumer.file,
      sourceRoot: sourceRoot
    });
    aSourceMapConsumer.eachMapping(function (mapping) {
      var newMapping = {
        generated: {
          line: mapping.generatedLine,
          column: mapping.generatedColumn
        }
      };

      if (mapping.source != null) {
        newMapping.source = mapping.source;
        if (sourceRoot != null) {
          newMapping.source = util$1.relative(sourceRoot, newMapping.source);
        }

        newMapping.original = {
          line: mapping.originalLine,
          column: mapping.originalColumn
        };

        if (mapping.name != null) {
          newMapping.name = mapping.name;
        }
      }

      generator.addMapping(newMapping);
    });
    aSourceMapConsumer.sources.forEach(function (sourceFile) {
      var sourceRelative = sourceFile;
      if (sourceRoot !== null) {
        sourceRelative = util$1.relative(sourceRoot, sourceFile);
      }

      if (!generator._sources.has(sourceRelative)) {
        generator._sources.add(sourceRelative);
      }

      var content = aSourceMapConsumer.sourceContentFor(sourceFile);
      if (content != null) {
        generator.setSourceContent(sourceFile, content);
      }
    });
    return generator;
  };

/**
 * Add a single mapping from original source line and column to the generated
 * source's line and column for this source map being created. The mapping
 * object should have the following properties:
 *
 *   - generated: An object with the generated line and column positions.
 *   - original: An object with the original line and column positions.
 *   - source: The original source file (relative to the sourceRoot).
 *   - name: An optional original token name for this mapping.
 */
SourceMapGenerator$3.prototype.addMapping =
  function SourceMapGenerator_addMapping(aArgs) {
    var generated = util$1.getArg(aArgs, 'generated');
    var original = util$1.getArg(aArgs, 'original', null);
    var source = util$1.getArg(aArgs, 'source', null);
    var name = util$1.getArg(aArgs, 'name', null);

    if (!this._skipValidation) {
      this._validateMapping(generated, original, source, name);
    }

    if (source != null) {
      source = String(source);
      if (!this._sources.has(source)) {
        this._sources.add(source);
      }
    }

    if (name != null) {
      name = String(name);
      if (!this._names.has(name)) {
        this._names.add(name);
      }
    }

    this._mappings.add({
      generatedLine: generated.line,
      generatedColumn: generated.column,
      originalLine: original != null && original.line,
      originalColumn: original != null && original.column,
      source: source,
      name: name
    });
  };

/**
 * Set the source content for a source file.
 */
SourceMapGenerator$3.prototype.setSourceContent =
  function SourceMapGenerator_setSourceContent(aSourceFile, aSourceContent) {
    var source = aSourceFile;
    if (this._sourceRoot != null) {
      source = util$1.relative(this._sourceRoot, source);
    }

    if (aSourceContent != null) {
      // Add the source content to the _sourcesContents map.
      // Create a new _sourcesContents map if the property is null.
      if (!this._sourcesContents) {
        this._sourcesContents = Object.create(null);
      }
      this._sourcesContents[util$1.toSetString(source)] = aSourceContent;
    } else if (this._sourcesContents) {
      // Remove the source file from the _sourcesContents map.
      // If the _sourcesContents map is empty, set the property to null.
      delete this._sourcesContents[util$1.toSetString(source)];
      if (Object.keys(this._sourcesContents).length === 0) {
        this._sourcesContents = null;
      }
    }
  };

/**
 * Applies the mappings of a sub-source-map for a specific source file to the
 * source map being generated. Each mapping to the supplied source file is
 * rewritten using the supplied source map. Note: The resolution for the
 * resulting mappings is the minimium of this map and the supplied map.
 *
 * @param aSourceMapConsumer The source map to be applied.
 * @param aSourceFile Optional. The filename of the source file.
 *        If omitted, SourceMapConsumer's file property will be used.
 * @param aSourceMapPath Optional. The dirname of the path to the source map
 *        to be applied. If relative, it is relative to the SourceMapConsumer.
 *        This parameter is needed when the two source maps aren't in the same
 *        directory, and the source map to be applied contains relative source
 *        paths. If so, those relative source paths need to be rewritten
 *        relative to the SourceMapGenerator.
 */
SourceMapGenerator$3.prototype.applySourceMap =
  function SourceMapGenerator_applySourceMap(aSourceMapConsumer, aSourceFile, aSourceMapPath) {
    var sourceFile = aSourceFile;
    // If aSourceFile is omitted, we will use the file property of the SourceMap
    if (aSourceFile == null) {
      if (aSourceMapConsumer.file == null) {
        throw new Error(
          'SourceMapGenerator.prototype.applySourceMap requires either an explicit source file, ' +
          'or the source map\'s "file" property. Both were omitted.'
        );
      }
      sourceFile = aSourceMapConsumer.file;
    }
    var sourceRoot = this._sourceRoot;
    // Make "sourceFile" relative if an absolute Url is passed.
    if (sourceRoot != null) {
      sourceFile = util$1.relative(sourceRoot, sourceFile);
    }
    // Applying the SourceMap can add and remove items from the sources and
    // the names array.
    var newSources = new ArraySet$4();
    var newNames = new ArraySet$4();

    // Find mappings for the "sourceFile"
    this._mappings.unsortedForEach(function (mapping) {
      if (mapping.source === sourceFile && mapping.originalLine != null) {
        // Check if it can be mapped by the source map, then update the mapping.
        var original = aSourceMapConsumer.originalPositionFor({
          line: mapping.originalLine,
          column: mapping.originalColumn
        });
        if (original.source != null) {
          // Copy mapping
          mapping.source = original.source;
          if (aSourceMapPath != null) {
            mapping.source = util$1.join(aSourceMapPath, mapping.source);
          }
          if (sourceRoot != null) {
            mapping.source = util$1.relative(sourceRoot, mapping.source);
          }
          mapping.originalLine = original.line;
          mapping.originalColumn = original.column;
          if (original.name != null) {
            mapping.name = original.name;
          }
        }
      }

      var source = mapping.source;
      if (source != null && !newSources.has(source)) {
        newSources.add(source);
      }

      var name = mapping.name;
      if (name != null && !newNames.has(name)) {
        newNames.add(name);
      }

    }, this);
    this._sources = newSources;
    this._names = newNames;

    // Copy sourcesContents of applied map.
    aSourceMapConsumer.sources.forEach(function (sourceFile) {
      var content = aSourceMapConsumer.sourceContentFor(sourceFile);
      if (content != null) {
        if (aSourceMapPath != null) {
          sourceFile = util$1.join(aSourceMapPath, sourceFile);
        }
        if (sourceRoot != null) {
          sourceFile = util$1.relative(sourceRoot, sourceFile);
        }
        this.setSourceContent(sourceFile, content);
      }
    }, this);
  };

/**
 * A mapping can have one of the three levels of data:
 *
 *   1. Just the generated position.
 *   2. The Generated position, original position, and original source.
 *   3. Generated and original position, original source, as well as a name
 *      token.
 *
 * To maintain consistency, we validate that any new mapping being added falls
 * in to one of these categories.
 */
SourceMapGenerator$3.prototype._validateMapping =
  function SourceMapGenerator_validateMapping(aGenerated, aOriginal, aSource,
                                              aName) {
    // When aOriginal is truthy but has empty values for .line and .column,
    // it is most likely a programmer error. In this case we throw a very
    // specific error message to try to guide them the right way.
    // For example: https://github.com/Polymer/polymer-bundler/pull/519
    if (aOriginal && typeof aOriginal.line !== 'number' && typeof aOriginal.column !== 'number') {
        throw new Error(
            'original.line and original.column are not numbers -- you probably meant to omit ' +
            'the original mapping entirely and only map the generated position. If so, pass ' +
            'null for the original mapping instead of an object with empty or null values.'
        );
    }

    if (aGenerated && 'line' in aGenerated && 'column' in aGenerated
        && aGenerated.line > 0 && aGenerated.column >= 0
        && !aOriginal && !aSource && !aName) {
      // Case 1.
      return;
    }
    else if (aGenerated && 'line' in aGenerated && 'column' in aGenerated
             && aOriginal && 'line' in aOriginal && 'column' in aOriginal
             && aGenerated.line > 0 && aGenerated.column >= 0
             && aOriginal.line > 0 && aOriginal.column >= 0
             && aSource) {
      // Cases 2 and 3.
      return;
    }
    else {
      throw new Error('Invalid mapping: ' + JSON.stringify({
        generated: aGenerated,
        source: aSource,
        original: aOriginal,
        name: aName
      }));
    }
  };

/**
 * Serialize the accumulated mappings in to the stream of base 64 VLQs
 * specified by the source map format.
 */
SourceMapGenerator$3.prototype._serializeMappings =
  function SourceMapGenerator_serializeMappings() {
    var previousGeneratedColumn = 0;
    var previousGeneratedLine = 1;
    var previousOriginalColumn = 0;
    var previousOriginalLine = 0;
    var previousName = 0;
    var previousSource = 0;
    var result = '';
    var next;
    var mapping;
    var nameIdx;
    var sourceIdx;

    var mappings = this._mappings.toArray();
    for (var i = 0, len = mappings.length; i < len; i++) {
      mapping = mappings[i];
      next = '';

      if (mapping.generatedLine !== previousGeneratedLine) {
        previousGeneratedColumn = 0;
        while (mapping.generatedLine !== previousGeneratedLine) {
          next += ';';
          previousGeneratedLine++;
        }
      }
      else {
        if (i > 0) {
          if (!util$1.compareByGeneratedPositionsInflated(mapping, mappings[i - 1])) {
            continue;
          }
          next += ',';
        }
      }

      next += base64Vlq$1.encode(mapping.generatedColumn
                                 - previousGeneratedColumn);
      previousGeneratedColumn = mapping.generatedColumn;

      if (mapping.source != null) {
        sourceIdx = this._sources.indexOf(mapping.source);
        next += base64Vlq$1.encode(sourceIdx - previousSource);
        previousSource = sourceIdx;

        // lines are stored 0-based in SourceMap spec version 3
        next += base64Vlq$1.encode(mapping.originalLine - 1
                                   - previousOriginalLine);
        previousOriginalLine = mapping.originalLine - 1;

        next += base64Vlq$1.encode(mapping.originalColumn
                                   - previousOriginalColumn);
        previousOriginalColumn = mapping.originalColumn;

        if (mapping.name != null) {
          nameIdx = this._names.indexOf(mapping.name);
          next += base64Vlq$1.encode(nameIdx - previousName);
          previousName = nameIdx;
        }
      }

      result += next;
    }

    return result;
  };

SourceMapGenerator$3.prototype._generateSourcesContent =
  function SourceMapGenerator_generateSourcesContent(aSources, aSourceRoot) {
    return aSources.map(function (source) {
      if (!this._sourcesContents) {
        return null;
      }
      if (aSourceRoot != null) {
        source = util$1.relative(aSourceRoot, source);
      }
      var key = util$1.toSetString(source);
      return Object.prototype.hasOwnProperty.call(this._sourcesContents, key)
        ? this._sourcesContents[key]
        : null;
    }, this);
  };

/**
 * Externalize the source map.
 */
SourceMapGenerator$3.prototype.toJSON =
  function SourceMapGenerator_toJSON() {
    var map = {
      version: this._version,
      sources: this._sources.toArray(),
      names: this._names.toArray(),
      mappings: this._serializeMappings()
    };
    if (this._file != null) {
      map.file = this._file;
    }
    if (this._sourceRoot != null) {
      map.sourceRoot = this._sourceRoot;
    }
    if (this._sourcesContents) {
      map.sourcesContent = this._generateSourcesContent(map.sources, map.sourceRoot);
    }

    return map;
  };

/**
 * Render the source map being generated to a string.
 */
SourceMapGenerator$3.prototype.toString =
  function SourceMapGenerator_toString() {
    return JSON.stringify(this.toJSON());
  };

var SourceMapGenerator_1$1 = SourceMapGenerator$3;

var sourceMapGenerator$1 = {
	SourceMapGenerator: SourceMapGenerator_1$1
};

/* -*- Mode: js; js-indent-level: 2; -*- */

var binarySearch$1 = createCommonjsModule(function (module, exports) {
/*
 * Copyright 2011 Mozilla Foundation and contributors
 * Licensed under the New BSD license. See LICENSE or:
 * http://opensource.org/licenses/BSD-3-Clause
 */

exports.GREATEST_LOWER_BOUND = 1;
exports.LEAST_UPPER_BOUND = 2;

/**
 * Recursive implementation of binary search.
 *
 * @param aLow Indices here and lower do not contain the needle.
 * @param aHigh Indices here and higher do not contain the needle.
 * @param aNeedle The element being searched for.
 * @param aHaystack The non-empty array being searched.
 * @param aCompare Function which takes two elements and returns -1, 0, or 1.
 * @param aBias Either 'binarySearch.GREATEST_LOWER_BOUND' or
 *     'binarySearch.LEAST_UPPER_BOUND'. Specifies whether to return the
 *     closest element that is smaller than or greater than the one we are
 *     searching for, respectively, if the exact element cannot be found.
 */
function recursiveSearch(aLow, aHigh, aNeedle, aHaystack, aCompare, aBias) {
  // This function terminates when one of the following is true:
  //
  //   1. We find the exact element we are looking for.
  //
  //   2. We did not find the exact element, but we can return the index of
  //      the next-closest element.
  //
  //   3. We did not find the exact element, and there is no next-closest
  //      element than the one we are searching for, so we return -1.
  var mid = Math.floor((aHigh - aLow) / 2) + aLow;
  var cmp = aCompare(aNeedle, aHaystack[mid], true);
  if (cmp === 0) {
    // Found the element we are looking for.
    return mid;
  }
  else if (cmp > 0) {
    // Our needle is greater than aHaystack[mid].
    if (aHigh - mid > 1) {
      // The element is in the upper half.
      return recursiveSearch(mid, aHigh, aNeedle, aHaystack, aCompare, aBias);
    }

    // The exact needle element was not found in this haystack. Determine if
    // we are in termination case (3) or (2) and return the appropriate thing.
    if (aBias == exports.LEAST_UPPER_BOUND) {
      return aHigh < aHaystack.length ? aHigh : -1;
    } else {
      return mid;
    }
  }
  else {
    // Our needle is less than aHaystack[mid].
    if (mid - aLow > 1) {
      // The element is in the lower half.
      return recursiveSearch(aLow, mid, aNeedle, aHaystack, aCompare, aBias);
    }

    // we are in termination case (3) or (2) and return the appropriate thing.
    if (aBias == exports.LEAST_UPPER_BOUND) {
      return mid;
    } else {
      return aLow < 0 ? -1 : aLow;
    }
  }
}

/**
 * This is an implementation of binary search which will always try and return
 * the index of the closest element if there is no exact hit. This is because
 * mappings between original and generated line/col pairs are single points,
 * and there is an implicit region between each of them, so a miss just means
 * that you aren't on the very start of a region.
 *
 * @param aNeedle The element you are looking for.
 * @param aHaystack The array that is being searched.
 * @param aCompare A function which takes the needle and an element in the
 *     array and returns -1, 0, or 1 depending on whether the needle is less
 *     than, equal to, or greater than the element, respectively.
 * @param aBias Either 'binarySearch.GREATEST_LOWER_BOUND' or
 *     'binarySearch.LEAST_UPPER_BOUND'. Specifies whether to return the
 *     closest element that is smaller than or greater than the one we are
 *     searching for, respectively, if the exact element cannot be found.
 *     Defaults to 'binarySearch.GREATEST_LOWER_BOUND'.
 */
exports.search = function search(aNeedle, aHaystack, aCompare, aBias) {
  if (aHaystack.length === 0) {
    return -1;
  }

  var index = recursiveSearch(-1, aHaystack.length, aNeedle, aHaystack,
                              aCompare, aBias || exports.GREATEST_LOWER_BOUND);
  if (index < 0) {
    return -1;
  }

  // We have found either the exact element, or the next-closest element than
  // the one we are searching for. However, there may be more than one such
  // element. Make sure we always return the smallest of these.
  while (index - 1 >= 0) {
    if (aCompare(aHaystack[index], aHaystack[index - 1], true) !== 0) {
      break;
    }
    --index;
  }

  return index;
};
});

/* -*- Mode: js; js-indent-level: 2; -*- */
/*
 * Copyright 2011 Mozilla Foundation and contributors
 * Licensed under the New BSD license. See LICENSE or:
 * http://opensource.org/licenses/BSD-3-Clause
 */

// It turns out that some (most?) JavaScript engines don't self-host
// `Array.prototype.sort`. This makes sense because C++ will likely remain
// faster than JS when doing raw CPU-intensive sorting. However, when using a
// custom comparator function, calling back and forth between the VM's C++ and
// JIT'd JS is rather slow *and* loses JIT type information, resulting in
// worse generated code for the comparator function than would be optimal. In
// fact, when sorting with a comparator, these costs outweigh the benefits of
// sorting in C++. By using our own JS-implemented Quick Sort (below), we get
// a ~3500ms mean speed-up in `bench/bench.html`.

function SortTemplate(comparator) {

/**
 * Swap the elements indexed by `x` and `y` in the array `ary`.
 *
 * @param {Array} ary
 *        The array.
 * @param {Number} x
 *        The index of the first item.
 * @param {Number} y
 *        The index of the second item.
 */
function swap(ary, x, y) {
  var temp = ary[x];
  ary[x] = ary[y];
  ary[y] = temp;
}

/**
 * Returns a random integer within the range `low .. high` inclusive.
 *
 * @param {Number} low
 *        The lower bound on the range.
 * @param {Number} high
 *        The upper bound on the range.
 */
function randomIntInRange(low, high) {
  return Math.round(low + (Math.random() * (high - low)));
}

/**
 * The Quick Sort algorithm.
 *
 * @param {Array} ary
 *        An array to sort.
 * @param {function} comparator
 *        Function to use to compare two items.
 * @param {Number} p
 *        Start index of the array
 * @param {Number} r
 *        End index of the array
 */
function doQuickSort(ary, comparator, p, r) {
  // If our lower bound is less than our upper bound, we (1) partition the
  // array into two pieces and (2) recurse on each half. If it is not, this is
  // the empty array and our base case.

  if (p < r) {
    // (1) Partitioning.
    //
    // The partitioning chooses a pivot between `p` and `r` and moves all
    // elements that are less than or equal to the pivot to the before it, and
    // all the elements that are greater than it after it. The effect is that
    // once partition is done, the pivot is in the exact place it will be when
    // the array is put in sorted order, and it will not need to be moved
    // again. This runs in O(n) time.

    // Always choose a random pivot so that an input array which is reverse
    // sorted does not cause O(n^2) running time.
    var pivotIndex = randomIntInRange(p, r);
    var i = p - 1;

    swap(ary, pivotIndex, r);
    var pivot = ary[r];

    // Immediately after `j` is incremented in this loop, the following hold
    // true:
    //
    //   * Every element in `ary[p .. i]` is less than or equal to the pivot.
    //
    //   * Every element in `ary[i+1 .. j-1]` is greater than the pivot.
    for (var j = p; j < r; j++) {
      if (comparator(ary[j], pivot, false) <= 0) {
        i += 1;
        swap(ary, i, j);
      }
    }

    swap(ary, i + 1, j);
    var q = i + 1;

    // (2) Recurse on each half.

    doQuickSort(ary, comparator, p, q - 1);
    doQuickSort(ary, comparator, q + 1, r);
  }
}

  return doQuickSort;
}

function cloneSort(comparator) {
  let template = SortTemplate.toString();
  let templateFn = new Function(`return ${template}`)();
  return templateFn(comparator);
}

/**
 * Sort the given array in-place with the given comparator function.
 *
 * @param {Array} ary
 *        An array to sort.
 * @param {function} comparator
 *        Function to use to compare two items.
 */

let sortCache = new WeakMap();
var quickSort_1$1 = function (ary, comparator, start = 0) {
  let doQuickSort = sortCache.get(comparator);
  if (doQuickSort === void 0) {
    doQuickSort = cloneSort(comparator);
    sortCache.set(comparator, doQuickSort);
  }
  doQuickSort(ary, comparator, start, ary.length - 1);
};

var quickSort$2 = {
	quickSort: quickSort_1$1
};

/* -*- Mode: js; js-indent-level: 2; -*- */

/*
 * Copyright 2011 Mozilla Foundation and contributors
 * Licensed under the New BSD license. See LICENSE or:
 * http://opensource.org/licenses/BSD-3-Clause
 */



var ArraySet$5 = arraySet$1.ArraySet;

var quickSort$3 = quickSort$2.quickSort;

function SourceMapConsumer$2(aSourceMap, aSourceMapURL) {
  var sourceMap = aSourceMap;
  if (typeof aSourceMap === 'string') {
    sourceMap = util$1.parseSourceMapInput(aSourceMap);
  }

  return sourceMap.sections != null
    ? new IndexedSourceMapConsumer$1(sourceMap, aSourceMapURL)
    : new BasicSourceMapConsumer$1(sourceMap, aSourceMapURL);
}

SourceMapConsumer$2.fromSourceMap = function(aSourceMap, aSourceMapURL) {
  return BasicSourceMapConsumer$1.fromSourceMap(aSourceMap, aSourceMapURL);
};

/**
 * The version of the source mapping spec that we are consuming.
 */
SourceMapConsumer$2.prototype._version = 3;

// `__generatedMappings` and `__originalMappings` are arrays that hold the
// parsed mapping coordinates from the source map's "mappings" attribute. They
// are lazily instantiated, accessed via the `_generatedMappings` and
// `_originalMappings` getters respectively, and we only parse the mappings
// and create these arrays once queried for a source location. We jump through
// these hoops because there can be many thousands of mappings, and parsing
// them is expensive, so we only want to do it if we must.
//
// Each object in the arrays is of the form:
//
//     {
//       generatedLine: The line number in the generated code,
//       generatedColumn: The column number in the generated code,
//       source: The path to the original source file that generated this
//               chunk of code,
//       originalLine: The line number in the original source that
//                     corresponds to this chunk of generated code,
//       originalColumn: The column number in the original source that
//                       corresponds to this chunk of generated code,
//       name: The name of the original symbol which generated this chunk of
//             code.
//     }
//
// All properties except for `generatedLine` and `generatedColumn` can be
// `null`.
//
// `_generatedMappings` is ordered by the generated positions.
//
// `_originalMappings` is ordered by the original positions.

SourceMapConsumer$2.prototype.__generatedMappings = null;
Object.defineProperty(SourceMapConsumer$2.prototype, '_generatedMappings', {
  configurable: true,
  enumerable: true,
  get: function () {
    if (!this.__generatedMappings) {
      this._parseMappings(this._mappings, this.sourceRoot);
    }

    return this.__generatedMappings;
  }
});

SourceMapConsumer$2.prototype.__originalMappings = null;
Object.defineProperty(SourceMapConsumer$2.prototype, '_originalMappings', {
  configurable: true,
  enumerable: true,
  get: function () {
    if (!this.__originalMappings) {
      this._parseMappings(this._mappings, this.sourceRoot);
    }

    return this.__originalMappings;
  }
});

SourceMapConsumer$2.prototype._charIsMappingSeparator =
  function SourceMapConsumer_charIsMappingSeparator(aStr, index) {
    var c = aStr.charAt(index);
    return c === ";" || c === ",";
  };

/**
 * Parse the mappings in a string in to a data structure which we can easily
 * query (the ordered arrays in the `this.__generatedMappings` and
 * `this.__originalMappings` properties).
 */
SourceMapConsumer$2.prototype._parseMappings =
  function SourceMapConsumer_parseMappings(aStr, aSourceRoot) {
    throw new Error("Subclasses must implement _parseMappings");
  };

SourceMapConsumer$2.GENERATED_ORDER = 1;
SourceMapConsumer$2.ORIGINAL_ORDER = 2;

SourceMapConsumer$2.GREATEST_LOWER_BOUND = 1;
SourceMapConsumer$2.LEAST_UPPER_BOUND = 2;

/**
 * Iterate over each mapping between an original source/line/column and a
 * generated line/column in this source map.
 *
 * @param Function aCallback
 *        The function that is called with each mapping.
 * @param Object aContext
 *        Optional. If specified, this object will be the value of `this` every
 *        time that `aCallback` is called.
 * @param aOrder
 *        Either `SourceMapConsumer.GENERATED_ORDER` or
 *        `SourceMapConsumer.ORIGINAL_ORDER`. Specifies whether you want to
 *        iterate over the mappings sorted by the generated file's line/column
 *        order or the original's source/line/column order, respectively. Defaults to
 *        `SourceMapConsumer.GENERATED_ORDER`.
 */
SourceMapConsumer$2.prototype.eachMapping =
  function SourceMapConsumer_eachMapping(aCallback, aContext, aOrder) {
    var context = aContext || null;
    var order = aOrder || SourceMapConsumer$2.GENERATED_ORDER;

    var mappings;
    switch (order) {
    case SourceMapConsumer$2.GENERATED_ORDER:
      mappings = this._generatedMappings;
      break;
    case SourceMapConsumer$2.ORIGINAL_ORDER:
      mappings = this._originalMappings;
      break;
    default:
      throw new Error("Unknown order of iteration.");
    }

    var sourceRoot = this.sourceRoot;
    var boundCallback = aCallback.bind(context);
    var names = this._names;
    var sources = this._sources;
    var sourceMapURL = this._sourceMapURL;

    for (var i = 0, n = mappings.length; i < n; i++) {
      var mapping = mappings[i];
      var source = mapping.source === null ? null : sources.at(mapping.source);
      source = util$1.computeSourceURL(sourceRoot, source, sourceMapURL);
      boundCallback({
        source: source,
        generatedLine: mapping.generatedLine,
        generatedColumn: mapping.generatedColumn,
        originalLine: mapping.originalLine,
        originalColumn: mapping.originalColumn,
        name: mapping.name === null ? null : names.at(mapping.name)
      });
    }
  };

/**
 * Returns all generated line and column information for the original source,
 * line, and column provided. If no column is provided, returns all mappings
 * corresponding to a either the line we are searching for or the next
 * closest line that has any mappings. Otherwise, returns all mappings
 * corresponding to the given line and either the column we are searching for
 * or the next closest column that has any offsets.
 *
 * The only argument is an object with the following properties:
 *
 *   - source: The filename of the original source.
 *   - line: The line number in the original source.  The line number is 1-based.
 *   - column: Optional. the column number in the original source.
 *    The column number is 0-based.
 *
 * and an array of objects is returned, each with the following properties:
 *
 *   - line: The line number in the generated source, or null.  The
 *    line number is 1-based.
 *   - column: The column number in the generated source, or null.
 *    The column number is 0-based.
 */
SourceMapConsumer$2.prototype.allGeneratedPositionsFor =
  function SourceMapConsumer_allGeneratedPositionsFor(aArgs) {
    var line = util$1.getArg(aArgs, 'line');

    // When there is no exact match, BasicSourceMapConsumer.prototype._findMapping
    // returns the index of the closest mapping less than the needle. By
    // setting needle.originalColumn to 0, we thus find the last mapping for
    // the given line, provided such a mapping exists.
    var needle = {
      source: util$1.getArg(aArgs, 'source'),
      originalLine: line,
      originalColumn: util$1.getArg(aArgs, 'column', 0)
    };

    needle.source = this._findSourceIndex(needle.source);
    if (needle.source < 0) {
      return [];
    }

    var mappings = [];

    var index = this._findMapping(needle,
                                  this._originalMappings,
                                  "originalLine",
                                  "originalColumn",
                                  util$1.compareByOriginalPositions,
                                  binarySearch$1.LEAST_UPPER_BOUND);
    if (index >= 0) {
      var mapping = this._originalMappings[index];

      if (aArgs.column === undefined) {
        var originalLine = mapping.originalLine;

        // Iterate until either we run out of mappings, or we run into
        // a mapping for a different line than the one we found. Since
        // mappings are sorted, this is guaranteed to find all mappings for
        // the line we found.
        while (mapping && mapping.originalLine === originalLine) {
          mappings.push({
            line: util$1.getArg(mapping, 'generatedLine', null),
            column: util$1.getArg(mapping, 'generatedColumn', null),
            lastColumn: util$1.getArg(mapping, 'lastGeneratedColumn', null)
          });

          mapping = this._originalMappings[++index];
        }
      } else {
        var originalColumn = mapping.originalColumn;

        // Iterate until either we run out of mappings, or we run into
        // a mapping for a different line than the one we were searching for.
        // Since mappings are sorted, this is guaranteed to find all mappings for
        // the line we are searching for.
        while (mapping &&
               mapping.originalLine === line &&
               mapping.originalColumn == originalColumn) {
          mappings.push({
            line: util$1.getArg(mapping, 'generatedLine', null),
            column: util$1.getArg(mapping, 'generatedColumn', null),
            lastColumn: util$1.getArg(mapping, 'lastGeneratedColumn', null)
          });

          mapping = this._originalMappings[++index];
        }
      }
    }

    return mappings;
  };

var SourceMapConsumer_1$1 = SourceMapConsumer$2;

/**
 * A BasicSourceMapConsumer instance represents a parsed source map which we can
 * query for information about the original file positions by giving it a file
 * position in the generated source.
 *
 * The first parameter is the raw source map (either as a JSON string, or
 * already parsed to an object). According to the spec, source maps have the
 * following attributes:
 *
 *   - version: Which version of the source map spec this map is following.
 *   - sources: An array of URLs to the original source files.
 *   - names: An array of identifiers which can be referrenced by individual mappings.
 *   - sourceRoot: Optional. The URL root from which all sources are relative.
 *   - sourcesContent: Optional. An array of contents of the original source files.
 *   - mappings: A string of base64 VLQs which contain the actual mappings.
 *   - file: Optional. The generated file this source map is associated with.
 *
 * Here is an example source map, taken from the source map spec[0]:
 *
 *     {
 *       version : 3,
 *       file: "out.js",
 *       sourceRoot : "",
 *       sources: ["foo.js", "bar.js"],
 *       names: ["src", "maps", "are", "fun"],
 *       mappings: "AA,AB;;ABCDE;"
 *     }
 *
 * The second parameter, if given, is a string whose value is the URL
 * at which the source map was found.  This URL is used to compute the
 * sources array.
 *
 * [0]: https://docs.google.com/document/d/1U1RGAehQwRypUTovF1KRlpiOFze0b-_2gc6fAH0KY0k/edit?pli=1#
 */
function BasicSourceMapConsumer$1(aSourceMap, aSourceMapURL) {
  var sourceMap = aSourceMap;
  if (typeof aSourceMap === 'string') {
    sourceMap = util$1.parseSourceMapInput(aSourceMap);
  }

  var version = util$1.getArg(sourceMap, 'version');
  var sources = util$1.getArg(sourceMap, 'sources');
  // Sass 3.3 leaves out the 'names' array, so we deviate from the spec (which
  // requires the array) to play nice here.
  var names = util$1.getArg(sourceMap, 'names', []);
  var sourceRoot = util$1.getArg(sourceMap, 'sourceRoot', null);
  var sourcesContent = util$1.getArg(sourceMap, 'sourcesContent', null);
  var mappings = util$1.getArg(sourceMap, 'mappings');
  var file = util$1.getArg(sourceMap, 'file', null);

  // Once again, Sass deviates from the spec and supplies the version as a
  // string rather than a number, so we use loose equality checking here.
  if (version != this._version) {
    throw new Error('Unsupported version: ' + version);
  }

  if (sourceRoot) {
    sourceRoot = util$1.normalize(sourceRoot);
  }

  sources = sources
    .map(String)
    // Some source maps produce relative source paths like "./foo.js" instead of
    // "foo.js".  Normalize these first so that future comparisons will succeed.
    // See bugzil.la/1090768.
    .map(util$1.normalize)
    // Always ensure that absolute sources are internally stored relative to
    // the source root, if the source root is absolute. Not doing this would
    // be particularly problematic when the source root is a prefix of the
    // source (valid, but why??). See github issue #199 and bugzil.la/1188982.
    .map(function (source) {
      return sourceRoot && util$1.isAbsolute(sourceRoot) && util$1.isAbsolute(source)
        ? util$1.relative(sourceRoot, source)
        : source;
    });

  // Pass `true` below to allow duplicate names and sources. While source maps
  // are intended to be compressed and deduplicated, the TypeScript compiler
  // sometimes generates source maps with duplicates in them. See Github issue
  // #72 and bugzil.la/889492.
  this._names = ArraySet$5.fromArray(names.map(String), true);
  this._sources = ArraySet$5.fromArray(sources, true);

  this._absoluteSources = this._sources.toArray().map(function (s) {
    return util$1.computeSourceURL(sourceRoot, s, aSourceMapURL);
  });

  this.sourceRoot = sourceRoot;
  this.sourcesContent = sourcesContent;
  this._mappings = mappings;
  this._sourceMapURL = aSourceMapURL;
  this.file = file;
}

BasicSourceMapConsumer$1.prototype = Object.create(SourceMapConsumer$2.prototype);
BasicSourceMapConsumer$1.prototype.consumer = SourceMapConsumer$2;

/**
 * Utility function to find the index of a source.  Returns -1 if not
 * found.
 */
BasicSourceMapConsumer$1.prototype._findSourceIndex = function(aSource) {
  var relativeSource = aSource;
  if (this.sourceRoot != null) {
    relativeSource = util$1.relative(this.sourceRoot, relativeSource);
  }

  if (this._sources.has(relativeSource)) {
    return this._sources.indexOf(relativeSource);
  }

  // Maybe aSource is an absolute URL as returned by |sources|.  In
  // this case we can't simply undo the transform.
  var i;
  for (i = 0; i < this._absoluteSources.length; ++i) {
    if (this._absoluteSources[i] == aSource) {
      return i;
    }
  }

  return -1;
};

/**
 * Create a BasicSourceMapConsumer from a SourceMapGenerator.
 *
 * @param SourceMapGenerator aSourceMap
 *        The source map that will be consumed.
 * @param String aSourceMapURL
 *        The URL at which the source map can be found (optional)
 * @returns BasicSourceMapConsumer
 */
BasicSourceMapConsumer$1.fromSourceMap =
  function SourceMapConsumer_fromSourceMap(aSourceMap, aSourceMapURL) {
    var smc = Object.create(BasicSourceMapConsumer$1.prototype);

    var names = smc._names = ArraySet$5.fromArray(aSourceMap._names.toArray(), true);
    var sources = smc._sources = ArraySet$5.fromArray(aSourceMap._sources.toArray(), true);
    smc.sourceRoot = aSourceMap._sourceRoot;
    smc.sourcesContent = aSourceMap._generateSourcesContent(smc._sources.toArray(),
                                                            smc.sourceRoot);
    smc.file = aSourceMap._file;
    smc._sourceMapURL = aSourceMapURL;
    smc._absoluteSources = smc._sources.toArray().map(function (s) {
      return util$1.computeSourceURL(smc.sourceRoot, s, aSourceMapURL);
    });

    // Because we are modifying the entries (by converting string sources and
    // names to indices into the sources and names ArraySets), we have to make
    // a copy of the entry or else bad things happen. Shared mutable state
    // strikes again! See github issue #191.

    var generatedMappings = aSourceMap._mappings.toArray().slice();
    var destGeneratedMappings = smc.__generatedMappings = [];
    var destOriginalMappings = smc.__originalMappings = [];

    for (var i = 0, length = generatedMappings.length; i < length; i++) {
      var srcMapping = generatedMappings[i];
      var destMapping = new Mapping$1;
      destMapping.generatedLine = srcMapping.generatedLine;
      destMapping.generatedColumn = srcMapping.generatedColumn;

      if (srcMapping.source) {
        destMapping.source = sources.indexOf(srcMapping.source);
        destMapping.originalLine = srcMapping.originalLine;
        destMapping.originalColumn = srcMapping.originalColumn;

        if (srcMapping.name) {
          destMapping.name = names.indexOf(srcMapping.name);
        }

        destOriginalMappings.push(destMapping);
      }

      destGeneratedMappings.push(destMapping);
    }

    quickSort$3(smc.__originalMappings, util$1.compareByOriginalPositions);

    return smc;
  };

/**
 * The version of the source mapping spec that we are consuming.
 */
BasicSourceMapConsumer$1.prototype._version = 3;

/**
 * The list of original sources.
 */
Object.defineProperty(BasicSourceMapConsumer$1.prototype, 'sources', {
  get: function () {
    return this._absoluteSources.slice();
  }
});

/**
 * Provide the JIT with a nice shape / hidden class.
 */
function Mapping$1() {
  this.generatedLine = 0;
  this.generatedColumn = 0;
  this.source = null;
  this.originalLine = null;
  this.originalColumn = null;
  this.name = null;
}

/**
 * Parse the mappings in a string in to a data structure which we can easily
 * query (the ordered arrays in the `this.__generatedMappings` and
 * `this.__originalMappings` properties).
 */

const compareGenerated = util$1.compareByGeneratedPositionsDeflatedNoLine;
function sortGenerated(array, start) {
  let l = array.length;
  let n = array.length - start;
  if (n <= 1) {
    return;
  } else if (n == 2) {
    let a = array[start];
    let b = array[start + 1];
    if (compareGenerated(a, b) > 0) {
      array[start] = b;
      array[start + 1] = a;
    }
  } else if (n < 20) {
    for (let i = start; i < l; i++) {
      for (let j = i; j > start; j--) {
        let a = array[j - 1];
        let b = array[j];
        if (compareGenerated(a, b) <= 0) {
          break;
        }
        array[j - 1] = b;
        array[j] = a;
      }
    }
  } else {
    quickSort$3(array, compareGenerated, start);
  }
}
BasicSourceMapConsumer$1.prototype._parseMappings =
  function SourceMapConsumer_parseMappings(aStr, aSourceRoot) {
    var generatedLine = 1;
    var previousGeneratedColumn = 0;
    var previousOriginalLine = 0;
    var previousOriginalColumn = 0;
    var previousSource = 0;
    var previousName = 0;
    var length = aStr.length;
    var index = 0;
    var temp = {};
    var originalMappings = [];
    var generatedMappings = [];
    var mapping, segment, end, value;

    let subarrayStart = 0;
    while (index < length) {
      if (aStr.charAt(index) === ';') {
        generatedLine++;
        index++;
        previousGeneratedColumn = 0;

        sortGenerated(generatedMappings, subarrayStart);
        subarrayStart = generatedMappings.length;
      }
      else if (aStr.charAt(index) === ',') {
        index++;
      }
      else {
        mapping = new Mapping$1();
        mapping.generatedLine = generatedLine;

        for (end = index; end < length; end++) {
          if (this._charIsMappingSeparator(aStr, end)) {
            break;
          }
        }
        aStr.slice(index, end);

        segment = [];
        while (index < end) {
          base64Vlq$1.decode(aStr, index, temp);
          value = temp.value;
          index = temp.rest;
          segment.push(value);
        }

        if (segment.length === 2) {
          throw new Error('Found a source, but no line and column');
        }

        if (segment.length === 3) {
          throw new Error('Found a source and line, but no column');
        }

        // Generated column.
        mapping.generatedColumn = previousGeneratedColumn + segment[0];
        previousGeneratedColumn = mapping.generatedColumn;

        if (segment.length > 1) {
          // Original source.
          mapping.source = previousSource + segment[1];
          previousSource += segment[1];

          // Original line.
          mapping.originalLine = previousOriginalLine + segment[2];
          previousOriginalLine = mapping.originalLine;
          // Lines are stored 0-based
          mapping.originalLine += 1;

          // Original column.
          mapping.originalColumn = previousOriginalColumn + segment[3];
          previousOriginalColumn = mapping.originalColumn;

          if (segment.length > 4) {
            // Original name.
            mapping.name = previousName + segment[4];
            previousName += segment[4];
          }
        }

        generatedMappings.push(mapping);
        if (typeof mapping.originalLine === 'number') {
          let currentSource = mapping.source;
          while (originalMappings.length <= currentSource) {
            originalMappings.push(null);
          }
          if (originalMappings[currentSource] === null) {
            originalMappings[currentSource] = [];
          }
          originalMappings[currentSource].push(mapping);
        }
      }
    }

    sortGenerated(generatedMappings, subarrayStart);
    this.__generatedMappings = generatedMappings;

    for (var i = 0; i < originalMappings.length; i++) {
      if (originalMappings[i] != null) {
        quickSort$3(originalMappings[i], util$1.compareByOriginalPositionsNoSource);
      }
    }
    this.__originalMappings = [].concat(...originalMappings);
  };

/**
 * Find the mapping that best matches the hypothetical "needle" mapping that
 * we are searching for in the given "haystack" of mappings.
 */
BasicSourceMapConsumer$1.prototype._findMapping =
  function SourceMapConsumer_findMapping(aNeedle, aMappings, aLineName,
                                         aColumnName, aComparator, aBias) {
    // To return the position we are searching for, we must first find the
    // mapping for the given position and then return the opposite position it
    // points to. Because the mappings are sorted, we can use binary search to
    // find the best mapping.

    if (aNeedle[aLineName] <= 0) {
      throw new TypeError('Line must be greater than or equal to 1, got '
                          + aNeedle[aLineName]);
    }
    if (aNeedle[aColumnName] < 0) {
      throw new TypeError('Column must be greater than or equal to 0, got '
                          + aNeedle[aColumnName]);
    }

    return binarySearch$1.search(aNeedle, aMappings, aComparator, aBias);
  };

/**
 * Compute the last column for each generated mapping. The last column is
 * inclusive.
 */
BasicSourceMapConsumer$1.prototype.computeColumnSpans =
  function SourceMapConsumer_computeColumnSpans() {
    for (var index = 0; index < this._generatedMappings.length; ++index) {
      var mapping = this._generatedMappings[index];

      // Mappings do not contain a field for the last generated columnt. We
      // can come up with an optimistic estimate, however, by assuming that
      // mappings are contiguous (i.e. given two consecutive mappings, the
      // first mapping ends where the second one starts).
      if (index + 1 < this._generatedMappings.length) {
        var nextMapping = this._generatedMappings[index + 1];

        if (mapping.generatedLine === nextMapping.generatedLine) {
          mapping.lastGeneratedColumn = nextMapping.generatedColumn - 1;
          continue;
        }
      }

      // The last mapping for each line spans the entire line.
      mapping.lastGeneratedColumn = Infinity;
    }
  };

/**
 * Returns the original source, line, and column information for the generated
 * source's line and column positions provided. The only argument is an object
 * with the following properties:
 *
 *   - line: The line number in the generated source.  The line number
 *     is 1-based.
 *   - column: The column number in the generated source.  The column
 *     number is 0-based.
 *   - bias: Either 'SourceMapConsumer.GREATEST_LOWER_BOUND' or
 *     'SourceMapConsumer.LEAST_UPPER_BOUND'. Specifies whether to return the
 *     closest element that is smaller than or greater than the one we are
 *     searching for, respectively, if the exact element cannot be found.
 *     Defaults to 'SourceMapConsumer.GREATEST_LOWER_BOUND'.
 *
 * and an object is returned with the following properties:
 *
 *   - source: The original source file, or null.
 *   - line: The line number in the original source, or null.  The
 *     line number is 1-based.
 *   - column: The column number in the original source, or null.  The
 *     column number is 0-based.
 *   - name: The original identifier, or null.
 */
BasicSourceMapConsumer$1.prototype.originalPositionFor =
  function SourceMapConsumer_originalPositionFor(aArgs) {
    var needle = {
      generatedLine: util$1.getArg(aArgs, 'line'),
      generatedColumn: util$1.getArg(aArgs, 'column')
    };

    var index = this._findMapping(
      needle,
      this._generatedMappings,
      "generatedLine",
      "generatedColumn",
      util$1.compareByGeneratedPositionsDeflated,
      util$1.getArg(aArgs, 'bias', SourceMapConsumer$2.GREATEST_LOWER_BOUND)
    );

    if (index >= 0) {
      var mapping = this._generatedMappings[index];

      if (mapping.generatedLine === needle.generatedLine) {
        var source = util$1.getArg(mapping, 'source', null);
        if (source !== null) {
          source = this._sources.at(source);
          source = util$1.computeSourceURL(this.sourceRoot, source, this._sourceMapURL);
        }
        var name = util$1.getArg(mapping, 'name', null);
        if (name !== null) {
          name = this._names.at(name);
        }
        return {
          source: source,
          line: util$1.getArg(mapping, 'originalLine', null),
          column: util$1.getArg(mapping, 'originalColumn', null),
          name: name
        };
      }
    }

    return {
      source: null,
      line: null,
      column: null,
      name: null
    };
  };

/**
 * Return true if we have the source content for every source in the source
 * map, false otherwise.
 */
BasicSourceMapConsumer$1.prototype.hasContentsOfAllSources =
  function BasicSourceMapConsumer_hasContentsOfAllSources() {
    if (!this.sourcesContent) {
      return false;
    }
    return this.sourcesContent.length >= this._sources.size() &&
      !this.sourcesContent.some(function (sc) { return sc == null; });
  };

/**
 * Returns the original source content. The only argument is the url of the
 * original source file. Returns null if no original source content is
 * available.
 */
BasicSourceMapConsumer$1.prototype.sourceContentFor =
  function SourceMapConsumer_sourceContentFor(aSource, nullOnMissing) {
    if (!this.sourcesContent) {
      return null;
    }

    var index = this._findSourceIndex(aSource);
    if (index >= 0) {
      return this.sourcesContent[index];
    }

    var relativeSource = aSource;
    if (this.sourceRoot != null) {
      relativeSource = util$1.relative(this.sourceRoot, relativeSource);
    }

    var url;
    if (this.sourceRoot != null
        && (url = util$1.urlParse(this.sourceRoot))) {
      // XXX: file:// URIs and absolute paths lead to unexpected behavior for
      // many users. We can help them out when they expect file:// URIs to
      // behave like it would if they were running a local HTTP server. See
      // https://bugzilla.mozilla.org/show_bug.cgi?id=885597.
      var fileUriAbsPath = relativeSource.replace(/^file:\/\//, "");
      if (url.scheme == "file"
          && this._sources.has(fileUriAbsPath)) {
        return this.sourcesContent[this._sources.indexOf(fileUriAbsPath)]
      }

      if ((!url.path || url.path == "/")
          && this._sources.has("/" + relativeSource)) {
        return this.sourcesContent[this._sources.indexOf("/" + relativeSource)];
      }
    }

    // This function is used recursively from
    // IndexedSourceMapConsumer.prototype.sourceContentFor. In that case, we
    // don't want to throw if we can't find the source - we just want to
    // return null, so we provide a flag to exit gracefully.
    if (nullOnMissing) {
      return null;
    }
    else {
      throw new Error('"' + relativeSource + '" is not in the SourceMap.');
    }
  };

/**
 * Returns the generated line and column information for the original source,
 * line, and column positions provided. The only argument is an object with
 * the following properties:
 *
 *   - source: The filename of the original source.
 *   - line: The line number in the original source.  The line number
 *     is 1-based.
 *   - column: The column number in the original source.  The column
 *     number is 0-based.
 *   - bias: Either 'SourceMapConsumer.GREATEST_LOWER_BOUND' or
 *     'SourceMapConsumer.LEAST_UPPER_BOUND'. Specifies whether to return the
 *     closest element that is smaller than or greater than the one we are
 *     searching for, respectively, if the exact element cannot be found.
 *     Defaults to 'SourceMapConsumer.GREATEST_LOWER_BOUND'.
 *
 * and an object is returned with the following properties:
 *
 *   - line: The line number in the generated source, or null.  The
 *     line number is 1-based.
 *   - column: The column number in the generated source, or null.
 *     The column number is 0-based.
 */
BasicSourceMapConsumer$1.prototype.generatedPositionFor =
  function SourceMapConsumer_generatedPositionFor(aArgs) {
    var source = util$1.getArg(aArgs, 'source');
    source = this._findSourceIndex(source);
    if (source < 0) {
      return {
        line: null,
        column: null,
        lastColumn: null
      };
    }

    var needle = {
      source: source,
      originalLine: util$1.getArg(aArgs, 'line'),
      originalColumn: util$1.getArg(aArgs, 'column')
    };

    var index = this._findMapping(
      needle,
      this._originalMappings,
      "originalLine",
      "originalColumn",
      util$1.compareByOriginalPositions,
      util$1.getArg(aArgs, 'bias', SourceMapConsumer$2.GREATEST_LOWER_BOUND)
    );

    if (index >= 0) {
      var mapping = this._originalMappings[index];

      if (mapping.source === needle.source) {
        return {
          line: util$1.getArg(mapping, 'generatedLine', null),
          column: util$1.getArg(mapping, 'generatedColumn', null),
          lastColumn: util$1.getArg(mapping, 'lastGeneratedColumn', null)
        };
      }
    }

    return {
      line: null,
      column: null,
      lastColumn: null
    };
  };

var BasicSourceMapConsumer_1$1 = BasicSourceMapConsumer$1;

/**
 * An IndexedSourceMapConsumer instance represents a parsed source map which
 * we can query for information. It differs from BasicSourceMapConsumer in
 * that it takes "indexed" source maps (i.e. ones with a "sections" field) as
 * input.
 *
 * The first parameter is a raw source map (either as a JSON string, or already
 * parsed to an object). According to the spec for indexed source maps, they
 * have the following attributes:
 *
 *   - version: Which version of the source map spec this map is following.
 *   - file: Optional. The generated file this source map is associated with.
 *   - sections: A list of section definitions.
 *
 * Each value under the "sections" field has two fields:
 *   - offset: The offset into the original specified at which this section
 *       begins to apply, defined as an object with a "line" and "column"
 *       field.
 *   - map: A source map definition. This source map could also be indexed,
 *       but doesn't have to be.
 *
 * Instead of the "map" field, it's also possible to have a "url" field
 * specifying a URL to retrieve a source map from, but that's currently
 * unsupported.
 *
 * Here's an example source map, taken from the source map spec[0], but
 * modified to omit a section which uses the "url" field.
 *
 *  {
 *    version : 3,
 *    file: "app.js",
 *    sections: [{
 *      offset: {line:100, column:10},
 *      map: {
 *        version : 3,
 *        file: "section.js",
 *        sources: ["foo.js", "bar.js"],
 *        names: ["src", "maps", "are", "fun"],
 *        mappings: "AAAA,E;;ABCDE;"
 *      }
 *    }],
 *  }
 *
 * The second parameter, if given, is a string whose value is the URL
 * at which the source map was found.  This URL is used to compute the
 * sources array.
 *
 * [0]: https://docs.google.com/document/d/1U1RGAehQwRypUTovF1KRlpiOFze0b-_2gc6fAH0KY0k/edit#heading=h.535es3xeprgt
 */
function IndexedSourceMapConsumer$1(aSourceMap, aSourceMapURL) {
  var sourceMap = aSourceMap;
  if (typeof aSourceMap === 'string') {
    sourceMap = util$1.parseSourceMapInput(aSourceMap);
  }

  var version = util$1.getArg(sourceMap, 'version');
  var sections = util$1.getArg(sourceMap, 'sections');

  if (version != this._version) {
    throw new Error('Unsupported version: ' + version);
  }

  this._sources = new ArraySet$5();
  this._names = new ArraySet$5();

  var lastOffset = {
    line: -1,
    column: 0
  };
  this._sections = sections.map(function (s) {
    if (s.url) {
      // The url field will require support for asynchronicity.
      // See https://github.com/mozilla/source-map/issues/16
      throw new Error('Support for url field in sections not implemented.');
    }
    var offset = util$1.getArg(s, 'offset');
    var offsetLine = util$1.getArg(offset, 'line');
    var offsetColumn = util$1.getArg(offset, 'column');

    if (offsetLine < lastOffset.line ||
        (offsetLine === lastOffset.line && offsetColumn < lastOffset.column)) {
      throw new Error('Section offsets must be ordered and non-overlapping.');
    }
    lastOffset = offset;

    return {
      generatedOffset: {
        // The offset fields are 0-based, but we use 1-based indices when
        // encoding/decoding from VLQ.
        generatedLine: offsetLine + 1,
        generatedColumn: offsetColumn + 1
      },
      consumer: new SourceMapConsumer$2(util$1.getArg(s, 'map'), aSourceMapURL)
    }
  });
}

IndexedSourceMapConsumer$1.prototype = Object.create(SourceMapConsumer$2.prototype);
IndexedSourceMapConsumer$1.prototype.constructor = SourceMapConsumer$2;

/**
 * The version of the source mapping spec that we are consuming.
 */
IndexedSourceMapConsumer$1.prototype._version = 3;

/**
 * The list of original sources.
 */
Object.defineProperty(IndexedSourceMapConsumer$1.prototype, 'sources', {
  get: function () {
    var sources = [];
    for (var i = 0; i < this._sections.length; i++) {
      for (var j = 0; j < this._sections[i].consumer.sources.length; j++) {
        sources.push(this._sections[i].consumer.sources[j]);
      }
    }
    return sources;
  }
});

/**
 * Returns the original source, line, and column information for the generated
 * source's line and column positions provided. The only argument is an object
 * with the following properties:
 *
 *   - line: The line number in the generated source.  The line number
 *     is 1-based.
 *   - column: The column number in the generated source.  The column
 *     number is 0-based.
 *
 * and an object is returned with the following properties:
 *
 *   - source: The original source file, or null.
 *   - line: The line number in the original source, or null.  The
 *     line number is 1-based.
 *   - column: The column number in the original source, or null.  The
 *     column number is 0-based.
 *   - name: The original identifier, or null.
 */
IndexedSourceMapConsumer$1.prototype.originalPositionFor =
  function IndexedSourceMapConsumer_originalPositionFor(aArgs) {
    var needle = {
      generatedLine: util$1.getArg(aArgs, 'line'),
      generatedColumn: util$1.getArg(aArgs, 'column')
    };

    // Find the section containing the generated position we're trying to map
    // to an original position.
    var sectionIndex = binarySearch$1.search(needle, this._sections,
      function(needle, section) {
        var cmp = needle.generatedLine - section.generatedOffset.generatedLine;
        if (cmp) {
          return cmp;
        }

        return (needle.generatedColumn -
                section.generatedOffset.generatedColumn);
      });
    var section = this._sections[sectionIndex];

    if (!section) {
      return {
        source: null,
        line: null,
        column: null,
        name: null
      };
    }

    return section.consumer.originalPositionFor({
      line: needle.generatedLine -
        (section.generatedOffset.generatedLine - 1),
      column: needle.generatedColumn -
        (section.generatedOffset.generatedLine === needle.generatedLine
         ? section.generatedOffset.generatedColumn - 1
         : 0),
      bias: aArgs.bias
    });
  };

/**
 * Return true if we have the source content for every source in the source
 * map, false otherwise.
 */
IndexedSourceMapConsumer$1.prototype.hasContentsOfAllSources =
  function IndexedSourceMapConsumer_hasContentsOfAllSources() {
    return this._sections.every(function (s) {
      return s.consumer.hasContentsOfAllSources();
    });
  };

/**
 * Returns the original source content. The only argument is the url of the
 * original source file. Returns null if no original source content is
 * available.
 */
IndexedSourceMapConsumer$1.prototype.sourceContentFor =
  function IndexedSourceMapConsumer_sourceContentFor(aSource, nullOnMissing) {
    for (var i = 0; i < this._sections.length; i++) {
      var section = this._sections[i];

      var content = section.consumer.sourceContentFor(aSource, true);
      if (content) {
        return content;
      }
    }
    if (nullOnMissing) {
      return null;
    }
    else {
      throw new Error('"' + aSource + '" is not in the SourceMap.');
    }
  };

/**
 * Returns the generated line and column information for the original source,
 * line, and column positions provided. The only argument is an object with
 * the following properties:
 *
 *   - source: The filename of the original source.
 *   - line: The line number in the original source.  The line number
 *     is 1-based.
 *   - column: The column number in the original source.  The column
 *     number is 0-based.
 *
 * and an object is returned with the following properties:
 *
 *   - line: The line number in the generated source, or null.  The
 *     line number is 1-based. 
 *   - column: The column number in the generated source, or null.
 *     The column number is 0-based.
 */
IndexedSourceMapConsumer$1.prototype.generatedPositionFor =
  function IndexedSourceMapConsumer_generatedPositionFor(aArgs) {
    for (var i = 0; i < this._sections.length; i++) {
      var section = this._sections[i];

      // Only consider this section if the requested source is in the list of
      // sources of the consumer.
      if (section.consumer._findSourceIndex(util$1.getArg(aArgs, 'source')) === -1) {
        continue;
      }
      var generatedPosition = section.consumer.generatedPositionFor(aArgs);
      if (generatedPosition) {
        var ret = {
          line: generatedPosition.line +
            (section.generatedOffset.generatedLine - 1),
          column: generatedPosition.column +
            (section.generatedOffset.generatedLine === generatedPosition.line
             ? section.generatedOffset.generatedColumn - 1
             : 0)
        };
        return ret;
      }
    }

    return {
      line: null,
      column: null
    };
  };

/**
 * Parse the mappings in a string in to a data structure which we can easily
 * query (the ordered arrays in the `this.__generatedMappings` and
 * `this.__originalMappings` properties).
 */
IndexedSourceMapConsumer$1.prototype._parseMappings =
  function IndexedSourceMapConsumer_parseMappings(aStr, aSourceRoot) {
    this.__generatedMappings = [];
    this.__originalMappings = [];
    for (var i = 0; i < this._sections.length; i++) {
      var section = this._sections[i];
      var sectionMappings = section.consumer._generatedMappings;
      for (var j = 0; j < sectionMappings.length; j++) {
        var mapping = sectionMappings[j];

        var source = section.consumer._sources.at(mapping.source);
        source = util$1.computeSourceURL(section.consumer.sourceRoot, source, this._sourceMapURL);
        this._sources.add(source);
        source = this._sources.indexOf(source);

        var name = null;
        if (mapping.name) {
          name = section.consumer._names.at(mapping.name);
          this._names.add(name);
          name = this._names.indexOf(name);
        }

        // The mappings coming from the consumer for the section have
        // generated positions relative to the start of the section, so we
        // need to offset them to be relative to the start of the concatenated
        // generated file.
        var adjustedMapping = {
          source: source,
          generatedLine: mapping.generatedLine +
            (section.generatedOffset.generatedLine - 1),
          generatedColumn: mapping.generatedColumn +
            (section.generatedOffset.generatedLine === mapping.generatedLine
            ? section.generatedOffset.generatedColumn - 1
            : 0),
          originalLine: mapping.originalLine,
          originalColumn: mapping.originalColumn,
          name: name
        };

        this.__generatedMappings.push(adjustedMapping);
        if (typeof adjustedMapping.originalLine === 'number') {
          this.__originalMappings.push(adjustedMapping);
        }
      }
    }

    quickSort$3(this.__generatedMappings, util$1.compareByGeneratedPositionsDeflated);
    quickSort$3(this.__originalMappings, util$1.compareByOriginalPositions);
  };

var IndexedSourceMapConsumer_1$1 = IndexedSourceMapConsumer$1;

var sourceMapConsumer$1 = {
	SourceMapConsumer: SourceMapConsumer_1$1,
	BasicSourceMapConsumer: BasicSourceMapConsumer_1$1,
	IndexedSourceMapConsumer: IndexedSourceMapConsumer_1$1
};

/* -*- Mode: js; js-indent-level: 2; -*- */

/*
 * Copyright 2011 Mozilla Foundation and contributors
 * Licensed under the New BSD license. See LICENSE or:
 * http://opensource.org/licenses/BSD-3-Clause
 */

var SourceMapGenerator$4 = sourceMapGenerator$1.SourceMapGenerator;


// Matches a Windows-style `\r\n` newline or a `\n` newline used by all other
// operating systems these days (capturing the result).
var REGEX_NEWLINE$1 = /(\r?\n)/;

// Newline character code for charCodeAt() comparisons
var NEWLINE_CODE$1 = 10;

// Private symbol for identifying `SourceNode`s when multiple versions of
// the source-map library are loaded. This MUST NOT CHANGE across
// versions!
var isSourceNode$1 = "$$$isSourceNode$$$";

/**
 * SourceNodes provide a way to abstract over interpolating/concatenating
 * snippets of generated JavaScript source code while maintaining the line and
 * column information associated with the original source code.
 *
 * @param aLine The original line number.
 * @param aColumn The original column number.
 * @param aSource The original source's filename.
 * @param aChunks Optional. An array of strings which are snippets of
 *        generated JS, or other SourceNodes.
 * @param aName The original identifier.
 */
function SourceNode$2(aLine, aColumn, aSource, aChunks, aName) {
  this.children = [];
  this.sourceContents = {};
  this.line = aLine == null ? null : aLine;
  this.column = aColumn == null ? null : aColumn;
  this.source = aSource == null ? null : aSource;
  this.name = aName == null ? null : aName;
  this[isSourceNode$1] = true;
  if (aChunks != null) this.add(aChunks);
}

/**
 * Creates a SourceNode from generated code and a SourceMapConsumer.
 *
 * @param aGeneratedCode The generated code
 * @param aSourceMapConsumer The SourceMap for the generated code
 * @param aRelativePath Optional. The path that relative sources in the
 *        SourceMapConsumer should be relative to.
 */
SourceNode$2.fromStringWithSourceMap =
  function SourceNode_fromStringWithSourceMap(aGeneratedCode, aSourceMapConsumer, aRelativePath) {
    // The SourceNode we want to fill with the generated code
    // and the SourceMap
    var node = new SourceNode$2();

    // All even indices of this array are one line of the generated code,
    // while all odd indices are the newlines between two adjacent lines
    // (since `REGEX_NEWLINE` captures its match).
    // Processed fragments are accessed by calling `shiftNextLine`.
    var remainingLines = aGeneratedCode.split(REGEX_NEWLINE$1);
    var remainingLinesIndex = 0;
    var shiftNextLine = function() {
      var lineContents = getNextLine();
      // The last line of a file might not have a newline.
      var newLine = getNextLine() || "";
      return lineContents + newLine;

      function getNextLine() {
        return remainingLinesIndex < remainingLines.length ?
            remainingLines[remainingLinesIndex++] : undefined;
      }
    };

    // We need to remember the position of "remainingLines"
    var lastGeneratedLine = 1, lastGeneratedColumn = 0;

    // The generate SourceNodes we need a code range.
    // To extract it current and last mapping is used.
    // Here we store the last mapping.
    var lastMapping = null;

    aSourceMapConsumer.eachMapping(function (mapping) {
      if (lastMapping !== null) {
        // We add the code from "lastMapping" to "mapping":
        // First check if there is a new line in between.
        if (lastGeneratedLine < mapping.generatedLine) {
          // Associate first line with "lastMapping"
          addMappingWithCode(lastMapping, shiftNextLine());
          lastGeneratedLine++;
          lastGeneratedColumn = 0;
          // The remaining code is added without mapping
        } else {
          // There is no new line in between.
          // Associate the code between "lastGeneratedColumn" and
          // "mapping.generatedColumn" with "lastMapping"
          var nextLine = remainingLines[remainingLinesIndex] || '';
          var code = nextLine.substr(0, mapping.generatedColumn -
                                        lastGeneratedColumn);
          remainingLines[remainingLinesIndex] = nextLine.substr(mapping.generatedColumn -
                                              lastGeneratedColumn);
          lastGeneratedColumn = mapping.generatedColumn;
          addMappingWithCode(lastMapping, code);
          // No more remaining code, continue
          lastMapping = mapping;
          return;
        }
      }
      // We add the generated code until the first mapping
      // to the SourceNode without any mapping.
      // Each line is added as separate string.
      while (lastGeneratedLine < mapping.generatedLine) {
        node.add(shiftNextLine());
        lastGeneratedLine++;
      }
      if (lastGeneratedColumn < mapping.generatedColumn) {
        var nextLine = remainingLines[remainingLinesIndex] || '';
        node.add(nextLine.substr(0, mapping.generatedColumn));
        remainingLines[remainingLinesIndex] = nextLine.substr(mapping.generatedColumn);
        lastGeneratedColumn = mapping.generatedColumn;
      }
      lastMapping = mapping;
    }, this);
    // We have processed all mappings.
    if (remainingLinesIndex < remainingLines.length) {
      if (lastMapping) {
        // Associate the remaining code in the current line with "lastMapping"
        addMappingWithCode(lastMapping, shiftNextLine());
      }
      // and add the remaining lines without any mapping
      node.add(remainingLines.splice(remainingLinesIndex).join(""));
    }

    // Copy sourcesContent into SourceNode
    aSourceMapConsumer.sources.forEach(function (sourceFile) {
      var content = aSourceMapConsumer.sourceContentFor(sourceFile);
      if (content != null) {
        if (aRelativePath != null) {
          sourceFile = util$1.join(aRelativePath, sourceFile);
        }
        node.setSourceContent(sourceFile, content);
      }
    });

    return node;

    function addMappingWithCode(mapping, code) {
      if (mapping === null || mapping.source === undefined) {
        node.add(code);
      } else {
        var source = aRelativePath
          ? util$1.join(aRelativePath, mapping.source)
          : mapping.source;
        node.add(new SourceNode$2(mapping.originalLine,
                                mapping.originalColumn,
                                source,
                                code,
                                mapping.name));
      }
    }
  };

/**
 * Add a chunk of generated JS to this source node.
 *
 * @param aChunk A string snippet of generated JS code, another instance of
 *        SourceNode, or an array where each member is one of those things.
 */
SourceNode$2.prototype.add = function SourceNode_add(aChunk) {
  if (Array.isArray(aChunk)) {
    aChunk.forEach(function (chunk) {
      this.add(chunk);
    }, this);
  }
  else if (aChunk[isSourceNode$1] || typeof aChunk === "string") {
    if (aChunk) {
      this.children.push(aChunk);
    }
  }
  else {
    throw new TypeError(
      "Expected a SourceNode, string, or an array of SourceNodes and strings. Got " + aChunk
    );
  }
  return this;
};

/**
 * Add a chunk of generated JS to the beginning of this source node.
 *
 * @param aChunk A string snippet of generated JS code, another instance of
 *        SourceNode, or an array where each member is one of those things.
 */
SourceNode$2.prototype.prepend = function SourceNode_prepend(aChunk) {
  if (Array.isArray(aChunk)) {
    for (var i = aChunk.length-1; i >= 0; i--) {
      this.prepend(aChunk[i]);
    }
  }
  else if (aChunk[isSourceNode$1] || typeof aChunk === "string") {
    this.children.unshift(aChunk);
  }
  else {
    throw new TypeError(
      "Expected a SourceNode, string, or an array of SourceNodes and strings. Got " + aChunk
    );
  }
  return this;
};

/**
 * Walk over the tree of JS snippets in this node and its children. The
 * walking function is called once for each snippet of JS and is passed that
 * snippet and the its original associated source's line/column location.
 *
 * @param aFn The traversal function.
 */
SourceNode$2.prototype.walk = function SourceNode_walk(aFn) {
  var chunk;
  for (var i = 0, len = this.children.length; i < len; i++) {
    chunk = this.children[i];
    if (chunk[isSourceNode$1]) {
      chunk.walk(aFn);
    }
    else {
      if (chunk !== '') {
        aFn(chunk, { source: this.source,
                     line: this.line,
                     column: this.column,
                     name: this.name });
      }
    }
  }
};

/**
 * Like `String.prototype.join` except for SourceNodes. Inserts `aStr` between
 * each of `this.children`.
 *
 * @param aSep The separator.
 */
SourceNode$2.prototype.join = function SourceNode_join(aSep) {
  var newChildren;
  var i;
  var len = this.children.length;
  if (len > 0) {
    newChildren = [];
    for (i = 0; i < len-1; i++) {
      newChildren.push(this.children[i]);
      newChildren.push(aSep);
    }
    newChildren.push(this.children[i]);
    this.children = newChildren;
  }
  return this;
};

/**
 * Call String.prototype.replace on the very right-most source snippet. Useful
 * for trimming whitespace from the end of a source node, etc.
 *
 * @param aPattern The pattern to replace.
 * @param aReplacement The thing to replace the pattern with.
 */
SourceNode$2.prototype.replaceRight = function SourceNode_replaceRight(aPattern, aReplacement) {
  var lastChild = this.children[this.children.length - 1];
  if (lastChild[isSourceNode$1]) {
    lastChild.replaceRight(aPattern, aReplacement);
  }
  else if (typeof lastChild === 'string') {
    this.children[this.children.length - 1] = lastChild.replace(aPattern, aReplacement);
  }
  else {
    this.children.push(''.replace(aPattern, aReplacement));
  }
  return this;
};

/**
 * Set the source content for a source file. This will be added to the SourceMapGenerator
 * in the sourcesContent field.
 *
 * @param aSourceFile The filename of the source file
 * @param aSourceContent The content of the source file
 */
SourceNode$2.prototype.setSourceContent =
  function SourceNode_setSourceContent(aSourceFile, aSourceContent) {
    this.sourceContents[util$1.toSetString(aSourceFile)] = aSourceContent;
  };

/**
 * Walk over the tree of SourceNodes. The walking function is called for each
 * source file content and is passed the filename and source content.
 *
 * @param aFn The traversal function.
 */
SourceNode$2.prototype.walkSourceContents =
  function SourceNode_walkSourceContents(aFn) {
    for (var i = 0, len = this.children.length; i < len; i++) {
      if (this.children[i][isSourceNode$1]) {
        this.children[i].walkSourceContents(aFn);
      }
    }

    var sources = Object.keys(this.sourceContents);
    for (var i = 0, len = sources.length; i < len; i++) {
      aFn(util$1.fromSetString(sources[i]), this.sourceContents[sources[i]]);
    }
  };

/**
 * Return the string representation of this source node. Walks over the tree
 * and concatenates all the various snippets together to one string.
 */
SourceNode$2.prototype.toString = function SourceNode_toString() {
  var str = "";
  this.walk(function (chunk) {
    str += chunk;
  });
  return str;
};

/**
 * Returns the string representation of this source node along with a source
 * map.
 */
SourceNode$2.prototype.toStringWithSourceMap = function SourceNode_toStringWithSourceMap(aArgs) {
  var generated = {
    code: "",
    line: 1,
    column: 0
  };
  var map = new SourceMapGenerator$4(aArgs);
  var sourceMappingActive = false;
  var lastOriginalSource = null;
  var lastOriginalLine = null;
  var lastOriginalColumn = null;
  var lastOriginalName = null;
  this.walk(function (chunk, original) {
    generated.code += chunk;
    if (original.source !== null
        && original.line !== null
        && original.column !== null) {
      if(lastOriginalSource !== original.source
         || lastOriginalLine !== original.line
         || lastOriginalColumn !== original.column
         || lastOriginalName !== original.name) {
        map.addMapping({
          source: original.source,
          original: {
            line: original.line,
            column: original.column
          },
          generated: {
            line: generated.line,
            column: generated.column
          },
          name: original.name
        });
      }
      lastOriginalSource = original.source;
      lastOriginalLine = original.line;
      lastOriginalColumn = original.column;
      lastOriginalName = original.name;
      sourceMappingActive = true;
    } else if (sourceMappingActive) {
      map.addMapping({
        generated: {
          line: generated.line,
          column: generated.column
        }
      });
      lastOriginalSource = null;
      sourceMappingActive = false;
    }
    for (var idx = 0, length = chunk.length; idx < length; idx++) {
      if (chunk.charCodeAt(idx) === NEWLINE_CODE$1) {
        generated.line++;
        generated.column = 0;
        // Mappings end at eol
        if (idx + 1 === length) {
          lastOriginalSource = null;
          sourceMappingActive = false;
        } else if (sourceMappingActive) {
          map.addMapping({
            source: original.source,
            original: {
              line: original.line,
              column: original.column
            },
            generated: {
              line: generated.line,
              column: generated.column
            },
            name: original.name
          });
        }
      } else {
        generated.column++;
      }
    }
  });
  this.walkSourceContents(function (sourceFile, sourceContent) {
    map.setSourceContent(sourceFile, sourceContent);
  });

  return { code: generated.code, map: map };
};

var SourceNode_1$1 = SourceNode$2;

var sourceNode$1 = {
	SourceNode: SourceNode_1$1
};

/*
 * Copyright 2009-2011 Mozilla Foundation and contributors
 * Licensed under the New BSD license. See LICENSE.txt or:
 * http://opensource.org/licenses/BSD-3-Clause
 */

var SourceMapGenerator$5 = sourceMapGenerator$1.SourceMapGenerator;
var SourceMapConsumer$3 = sourceMapConsumer$1.SourceMapConsumer;
var SourceNode$3 = sourceNode$1.SourceNode;

var sourceMap$1 = {
	SourceMapGenerator: SourceMapGenerator$5,
	SourceMapConsumer: SourceMapConsumer$3,
	SourceNode: SourceNode$3
};

let urlAlphabet =
  'useandom-26T198340PX75pxJACKVERYMINDBUSHWOLF_GQZbfghjklqvwyzrict';
let customAlphabet = (alphabet, size) => {
  return () => {
    let id = '';
    let i = size;
    while (i--) {
      id += alphabet[(Math.random() * alphabet.length) | 0];
    }
    return id
  }
};
let nanoid = (size = 21) => {
  let id = '';
  let i = size;
  while (i--) {
    id += urlAlphabet[(Math.random() * 64) | 0];
  }
  return id
};
var nonSecure = { nanoid, customAlphabet };

let { SourceMapConsumer: SourceMapConsumer$4, SourceMapGenerator: SourceMapGenerator$6 } = sourceMap$1;
let { existsSync, readFileSync } = _fs;
let { dirname: dirname$1, join: join$1 } = _path;

function fromBase64(str) {
  if (Buffer) {
    return Buffer.from(str, 'base64').toString()
  } else {
    /* c8 ignore next 2 */
    return window.atob(str)
  }
}

class PreviousMap {
  constructor(css, opts) {
    if (opts.map === false) return
    this.loadAnnotation(css);
    this.inline = this.startWith(this.annotation, 'data:');

    let prev = opts.map ? opts.map.prev : undefined;
    let text = this.loadMap(opts.from, prev);
    if (!this.mapFile && opts.from) {
      this.mapFile = opts.from;
    }
    if (this.mapFile) this.root = dirname$1(this.mapFile);
    if (text) this.text = text;
  }

  consumer() {
    if (!this.consumerCache) {
      this.consumerCache = new SourceMapConsumer$4(this.text);
    }
    return this.consumerCache
  }

  withContent() {
    return !!(
      this.consumer().sourcesContent &&
      this.consumer().sourcesContent.length > 0
    )
  }

  startWith(string, start) {
    if (!string) return false
    return string.substr(0, start.length) === start
  }

  getAnnotationURL(sourceMapString) {
    return sourceMapString.replace(/^\/\*\s*# sourceMappingURL=/, '').trim()
  }

  loadAnnotation(css) {
    let comments = css.match(/\/\*\s*# sourceMappingURL=/gm);
    if (!comments) return

    // sourceMappingURLs from comments, strings, etc.
    let start = css.lastIndexOf(comments.pop());
    let end = css.indexOf('*/', start);

    if (start > -1 && end > -1) {
      // Locate the last sourceMappingURL to avoid pickin
      this.annotation = this.getAnnotationURL(css.substring(start, end));
    }
  }

  decodeInline(text) {
    let baseCharsetUri = /^data:application\/json;charset=utf-?8;base64,/;
    let baseUri = /^data:application\/json;base64,/;
    let charsetUri = /^data:application\/json;charset=utf-?8,/;
    let uri = /^data:application\/json,/;

    if (charsetUri.test(text) || uri.test(text)) {
      return decodeURIComponent(text.substr(RegExp.lastMatch.length))
    }

    if (baseCharsetUri.test(text) || baseUri.test(text)) {
      return fromBase64(text.substr(RegExp.lastMatch.length))
    }

    let encoding = text.match(/data:application\/json;([^,]+),/)[1];
    throw new Error('Unsupported source map encoding ' + encoding)
  }

  loadFile(path) {
    this.root = dirname$1(path);
    if (existsSync(path)) {
      this.mapFile = path;
      return readFileSync(path, 'utf-8').toString().trim()
    }
  }

  loadMap(file, prev) {
    if (prev === false) return false

    if (prev) {
      if (typeof prev === 'string') {
        return prev
      } else if (typeof prev === 'function') {
        let prevPath = prev(file);
        if (prevPath) {
          let map = this.loadFile(prevPath);
          if (!map) {
            throw new Error(
              'Unable to load previous source map: ' + prevPath.toString()
            )
          }
          return map
        }
      } else if (prev instanceof SourceMapConsumer$4) {
        return SourceMapGenerator$6.fromSourceMap(prev).toString()
      } else if (prev instanceof SourceMapGenerator$6) {
        return prev.toString()
      } else if (this.isMap(prev)) {
        return JSON.stringify(prev)
      } else {
        throw new Error(
          'Unsupported previous source map format: ' + prev.toString()
        )
      }
    } else if (this.inline) {
      return this.decodeInline(this.annotation)
    } else if (this.annotation) {
      let map = this.annotation;
      if (file) map = join$1(dirname$1(file), map);
      return this.loadFile(map)
    }
  }

  isMap(map) {
    if (typeof map !== 'object') return false
    return (
      typeof map.mappings === 'string' ||
      typeof map._mappings === 'string' ||
      Array.isArray(map.sections)
    )
  }
}

var previousMap = PreviousMap;
PreviousMap.default = PreviousMap;

var require$$2 = /*@__PURE__*/getAugmentedNamespace(_polyfillNode_url$1);

let { SourceMapConsumer: SourceMapConsumer$5, SourceMapGenerator: SourceMapGenerator$7 } = sourceMap$1;
let { fileURLToPath, pathToFileURL } = require$$2;
let { resolve: resolve$1, isAbsolute: isAbsolute$1 } = _path;
let { nanoid: nanoid$1 } = nonSecure;





let fromOffsetCache = Symbol('fromOffsetCache');

let sourceMapAvailable = Boolean(SourceMapConsumer$5 && SourceMapGenerator$7);
let pathAvailable = Boolean(resolve$1 && isAbsolute$1);

class Input$1 {
  constructor(css, opts = {}) {
    if (
      css === null ||
      typeof css === 'undefined' ||
      (typeof css === 'object' && !css.toString)
    ) {
      throw new Error(`PostCSS received ${css} instead of CSS string`)
    }

    this.css = css.toString();

    if (this.css[0] === '\uFEFF' || this.css[0] === '\uFFFE') {
      this.hasBOM = true;
      this.css = this.css.slice(1);
    } else {
      this.hasBOM = false;
    }

    if (opts.from) {
      if (
        !pathAvailable ||
        /^\w+:\/\//.test(opts.from) ||
        isAbsolute$1(opts.from)
      ) {
        this.file = opts.from;
      } else {
        this.file = resolve$1(opts.from);
      }
    }

    if (pathAvailable && sourceMapAvailable) {
      let map = new previousMap(this.css, opts);
      if (map.text) {
        this.map = map;
        let file = map.consumer().file;
        if (!this.file && file) this.file = this.mapResolve(file);
      }
    }

    if (!this.file) {
      this.id = '<input css ' + nanoid$1(6) + '>';
    }
    if (this.map) this.map.file = this.from;
  }

  fromOffset(offset) {
    let lastLine, lineToIndex;
    if (!this[fromOffsetCache]) {
      let lines = this.css.split('\n');
      lineToIndex = new Array(lines.length);
      let prevIndex = 0;

      for (let i = 0, l = lines.length; i < l; i++) {
        lineToIndex[i] = prevIndex;
        prevIndex += lines[i].length + 1;
      }

      this[fromOffsetCache] = lineToIndex;
    } else {
      lineToIndex = this[fromOffsetCache];
    }
    lastLine = lineToIndex[lineToIndex.length - 1];

    let min = 0;
    if (offset >= lastLine) {
      min = lineToIndex.length - 1;
    } else {
      let max = lineToIndex.length - 2;
      let mid;
      while (min < max) {
        mid = min + ((max - min) >> 1);
        if (offset < lineToIndex[mid]) {
          max = mid - 1;
        } else if (offset >= lineToIndex[mid + 1]) {
          min = mid + 1;
        } else {
          min = mid;
          break
        }
      }
    }
    return {
      line: min + 1,
      col: offset - lineToIndex[min] + 1
    }
  }

  error(message, line, column, opts = {}) {
    let result, endLine, endColumn;

    if (line && typeof line === 'object') {
      let start = line;
      let end = column;
      if (typeof line.offset === 'number') {
        let pos = this.fromOffset(start.offset);
        line = pos.line;
        column = pos.col;
      } else {
        line = start.line;
        column = start.column;
      }
      if (typeof end.offset === 'number') {
        let pos = this.fromOffset(end.offset);
        endLine = pos.line;
        endColumn = pos.col;
      } else {
        endLine = end.line;
        endColumn = end.column;
      }
    } else if (!column) {
      let pos = this.fromOffset(line);
      line = pos.line;
      column = pos.col;
    }

    let origin = this.origin(line, column, endLine, endColumn);
    if (origin) {
      result = new cssSyntaxError(
        message,
        origin.endLine === undefined
          ? origin.line
          : { line: origin.line, column: origin.column },
        origin.endLine === undefined
          ? origin.column
          : { line: origin.endLine, column: origin.endColumn },
        origin.source,
        origin.file,
        opts.plugin
      );
    } else {
      result = new cssSyntaxError(
        message,
        endLine === undefined ? line : { line, column },
        endLine === undefined ? column : { line: endLine, column: endColumn },
        this.css,
        this.file,
        opts.plugin
      );
    }

    result.input = { line, column, endLine, endColumn, source: this.css };
    if (this.file) {
      if (pathToFileURL) {
        result.input.url = pathToFileURL(this.file).toString();
      }
      result.input.file = this.file;
    }

    return result
  }

  origin(line, column, endLine, endColumn) {
    if (!this.map) return false
    let consumer = this.map.consumer();

    let from = consumer.originalPositionFor({ line, column });
    if (!from.source) return false

    let to;
    if (typeof endLine === 'number') {
      to = consumer.originalPositionFor({ line: endLine, column: endColumn });
    }

    let fromUrl;

    if (isAbsolute$1(from.source)) {
      fromUrl = pathToFileURL(from.source);
    } else {
      fromUrl = new URL(
        from.source,
        this.map.consumer().sourceRoot || pathToFileURL(this.map.mapFile)
      );
    }

    let result = {
      url: fromUrl.toString(),
      line: from.line,
      column: from.column,
      endLine: to && to.line,
      endColumn: to && to.column
    };

    if (fromUrl.protocol === 'file:') {
      if (fileURLToPath) {
        result.file = fileURLToPath(fromUrl);
      } else {
        /* c8 ignore next 2 */
        throw new Error(`file: protocol is not available in this PostCSS build`)
      }
    }

    let source = consumer.sourceContentFor(from.source);
    if (source) result.source = source;

    return result
  }

  mapResolve(file) {
    if (/^\w+:\/\//.test(file)) {
      return file
    }
    return resolve$1(this.map.consumer().sourceRoot || this.map.root || '.', file)
  }

  get from() {
    return this.file || this.id
  }

  toJSON() {
    let json = {};
    for (let name of ['hasBOM', 'css', 'file', 'id']) {
      if (this[name] != null) {
        json[name] = this[name];
      }
    }
    if (this.map) {
      json.map = { ...this.map };
      if (json.map.consumerCache) {
        json.map.consumerCache = undefined;
      }
    }
    return json
  }
}

var input = Input$1;
Input$1.default = Input$1;

if (terminalHighlight_1 && terminalHighlight_1.registerInput) {
  terminalHighlight_1.registerInput(Input$1);
}

let { SourceMapConsumer: SourceMapConsumer$6, SourceMapGenerator: SourceMapGenerator$8 } = sourceMap$1;
let { dirname: dirname$2, resolve: resolve$2, relative: relative$1, sep: sep$1 } = _path;
let { pathToFileURL: pathToFileURL$1 } = require$$2;



let sourceMapAvailable$1 = Boolean(SourceMapConsumer$6 && SourceMapGenerator$8);
let pathAvailable$1 = Boolean(dirname$2 && resolve$2 && relative$1 && sep$1);

class MapGenerator {
  constructor(stringify, root, opts, cssString) {
    this.stringify = stringify;
    this.mapOpts = opts.map || {};
    this.root = root;
    this.opts = opts;
    this.css = cssString;
  }

  isMap() {
    if (typeof this.opts.map !== 'undefined') {
      return !!this.opts.map
    }
    return this.previous().length > 0
  }

  previous() {
    if (!this.previousMaps) {
      this.previousMaps = [];
      if (this.root) {
        this.root.walk(node => {
          if (node.source && node.source.input.map) {
            let map = node.source.input.map;
            if (!this.previousMaps.includes(map)) {
              this.previousMaps.push(map);
            }
          }
        });
      } else {
        let input$1 = new input(this.css, this.opts);
        if (input$1.map) this.previousMaps.push(input$1.map);
      }
    }

    return this.previousMaps
  }

  isInline() {
    if (typeof this.mapOpts.inline !== 'undefined') {
      return this.mapOpts.inline
    }

    let annotation = this.mapOpts.annotation;
    if (typeof annotation !== 'undefined' && annotation !== true) {
      return false
    }

    if (this.previous().length) {
      return this.previous().some(i => i.inline)
    }
    return true
  }

  isSourcesContent() {
    if (typeof this.mapOpts.sourcesContent !== 'undefined') {
      return this.mapOpts.sourcesContent
    }
    if (this.previous().length) {
      return this.previous().some(i => i.withContent())
    }
    return true
  }

  clearAnnotation() {
    if (this.mapOpts.annotation === false) return

    if (this.root) {
      let node;
      for (let i = this.root.nodes.length - 1; i >= 0; i--) {
        node = this.root.nodes[i];
        if (node.type !== 'comment') continue
        if (node.text.indexOf('# sourceMappingURL=') === 0) {
          this.root.removeChild(i);
        }
      }
    } else if (this.css) {
      this.css = this.css.replace(/(\n)?\/\*#[\S\s]*?\*\/$/gm, '');
    }
  }

  setSourcesContent() {
    let already = {};
    if (this.root) {
      this.root.walk(node => {
        if (node.source) {
          let from = node.source.input.from;
          if (from && !already[from]) {
            already[from] = true;
            this.map.setSourceContent(
              this.toUrl(this.path(from)),
              node.source.input.css
            );
          }
        }
      });
    } else if (this.css) {
      let from = this.opts.from
        ? this.toUrl(this.path(this.opts.from))
        : '<no source>';
      this.map.setSourceContent(from, this.css);
    }
  }

  applyPrevMaps() {
    for (let prev of this.previous()) {
      let from = this.toUrl(this.path(prev.file));
      let root = prev.root || dirname$2(prev.file);
      let map;

      if (this.mapOpts.sourcesContent === false) {
        map = new SourceMapConsumer$6(prev.text);
        if (map.sourcesContent) {
          map.sourcesContent = map.sourcesContent.map(() => null);
        }
      } else {
        map = prev.consumer();
      }

      this.map.applySourceMap(map, from, this.toUrl(this.path(root)));
    }
  }

  isAnnotation() {
    if (this.isInline()) {
      return true
    }
    if (typeof this.mapOpts.annotation !== 'undefined') {
      return this.mapOpts.annotation
    }
    if (this.previous().length) {
      return this.previous().some(i => i.annotation)
    }
    return true
  }

  toBase64(str) {
    if (Buffer) {
      return Buffer.from(str).toString('base64')
    } else {
      return window.btoa(unescape(encodeURIComponent(str)))
    }
  }

  addAnnotation() {
    let content;

    if (this.isInline()) {
      content =
        'data:application/json;base64,' + this.toBase64(this.map.toString());
    } else if (typeof this.mapOpts.annotation === 'string') {
      content = this.mapOpts.annotation;
    } else if (typeof this.mapOpts.annotation === 'function') {
      content = this.mapOpts.annotation(this.opts.to, this.root);
    } else {
      content = this.outputFile() + '.map';
    }
    let eol = '\n';
    if (this.css.includes('\r\n')) eol = '\r\n';

    this.css += eol + '/*# sourceMappingURL=' + content + ' */';
  }

  outputFile() {
    if (this.opts.to) {
      return this.path(this.opts.to)
    } else if (this.opts.from) {
      return this.path(this.opts.from)
    } else {
      return 'to.css'
    }
  }

  generateMap() {
    if (this.root) {
      this.generateString();
    } else if (this.previous().length === 1) {
      let prev = this.previous()[0].consumer();
      prev.file = this.outputFile();
      this.map = SourceMapGenerator$8.fromSourceMap(prev);
    } else {
      this.map = new SourceMapGenerator$8({ file: this.outputFile() });
      this.map.addMapping({
        source: this.opts.from
          ? this.toUrl(this.path(this.opts.from))
          : '<no source>',
        generated: { line: 1, column: 0 },
        original: { line: 1, column: 0 }
      });
    }

    if (this.isSourcesContent()) this.setSourcesContent();
    if (this.root && this.previous().length > 0) this.applyPrevMaps();
    if (this.isAnnotation()) this.addAnnotation();

    if (this.isInline()) {
      return [this.css]
    } else {
      return [this.css, this.map]
    }
  }

  path(file) {
    if (file.indexOf('<') === 0) return file
    if (/^\w+:\/\//.test(file)) return file
    if (this.mapOpts.absolute) return file

    let from = this.opts.to ? dirname$2(this.opts.to) : '.';

    if (typeof this.mapOpts.annotation === 'string') {
      from = dirname$2(resolve$2(from, this.mapOpts.annotation));
    }

    file = relative$1(from, file);
    return file
  }

  toUrl(path) {
    if (sep$1 === '\\') {
      path = path.replace(/\\/g, '/');
    }
    return encodeURI(path).replace(/[#?]/g, encodeURIComponent)
  }

  sourcePath(node) {
    if (this.mapOpts.from) {
      return this.toUrl(this.mapOpts.from)
    } else if (this.mapOpts.absolute) {
      if (pathToFileURL$1) {
        return pathToFileURL$1(node.source.input.from).toString()
      } else {
        throw new Error(
          '`map.absolute` option is not available in this PostCSS build'
        )
      }
    } else {
      return this.toUrl(this.path(node.source.input.from))
    }
  }

  generateString() {
    this.css = '';
    this.map = new SourceMapGenerator$8({ file: this.outputFile() });

    let line = 1;
    let column = 1;

    let noSource = '<no source>';
    let mapping = {
      source: '',
      generated: { line: 0, column: 0 },
      original: { line: 0, column: 0 }
    };

    let lines, last;
    this.stringify(this.root, (str, node, type) => {
      this.css += str;

      if (node && type !== 'end') {
        mapping.generated.line = line;
        mapping.generated.column = column - 1;
        if (node.source && node.source.start) {
          mapping.source = this.sourcePath(node);
          mapping.original.line = node.source.start.line;
          mapping.original.column = node.source.start.column - 1;
          this.map.addMapping(mapping);
        } else {
          mapping.source = noSource;
          mapping.original.line = 1;
          mapping.original.column = 0;
          this.map.addMapping(mapping);
        }
      }

      lines = str.match(/\n/g);
      if (lines) {
        line += lines.length;
        last = str.lastIndexOf('\n');
        column = str.length - last;
      } else {
        column += str.length;
      }

      if (node && type !== 'start') {
        let p = node.parent || { raws: {} };
        if (node.type !== 'decl' || node !== p.last || p.raws.semicolon) {
          if (node.source && node.source.end) {
            mapping.source = this.sourcePath(node);
            mapping.original.line = node.source.end.line;
            mapping.original.column = node.source.end.column - 1;
            mapping.generated.line = line;
            mapping.generated.column = column - 2;
            this.map.addMapping(mapping);
          } else {
            mapping.source = noSource;
            mapping.original.line = 1;
            mapping.original.column = 0;
            mapping.generated.line = line;
            mapping.generated.column = column - 1;
            this.map.addMapping(mapping);
          }
        }
      }
    });
  }

  generate() {
    this.clearAnnotation();
    if (pathAvailable$1 && sourceMapAvailable$1 && this.isMap()) {
      return this.generateMap()
    } else {
      let result = '';
      this.stringify(this.root, i => {
        result += i;
      });
      return [result]
    }
  }
}

var mapGenerator = MapGenerator;

class Comment extends node_1 {
  constructor(defaults) {
    super(defaults);
    this.type = 'comment';
  }
}

var comment = Comment;
Comment.default = Comment;

let { isClean: isClean$2, my: my$2 } = symbols;




let parse$5, Rule, AtRule;

function cleanSource(nodes) {
  return nodes.map(i => {
    if (i.nodes) i.nodes = cleanSource(i.nodes);
    delete i.source;
    return i
  })
}

function markDirtyUp(node) {
  node[isClean$2] = false;
  if (node.proxyOf.nodes) {
    for (let i of node.proxyOf.nodes) {
      markDirtyUp(i);
    }
  }
}

class Container extends node_1 {
  push(child) {
    child.parent = this;
    this.proxyOf.nodes.push(child);
    return this
  }

  each(callback) {
    if (!this.proxyOf.nodes) return undefined
    let iterator = this.getIterator();

    let index, result;
    while (this.indexes[iterator] < this.proxyOf.nodes.length) {
      index = this.indexes[iterator];
      result = callback(this.proxyOf.nodes[index], index);
      if (result === false) break

      this.indexes[iterator] += 1;
    }

    delete this.indexes[iterator];
    return result
  }

  walk(callback) {
    return this.each((child, i) => {
      let result;
      try {
        result = callback(child, i);
      } catch (e) {
        throw child.addToError(e)
      }
      if (result !== false && child.walk) {
        result = child.walk(callback);
      }

      return result
    })
  }

  walkDecls(prop, callback) {
    if (!callback) {
      callback = prop;
      return this.walk((child, i) => {
        if (child.type === 'decl') {
          return callback(child, i)
        }
      })
    }
    if (prop instanceof RegExp) {
      return this.walk((child, i) => {
        if (child.type === 'decl' && prop.test(child.prop)) {
          return callback(child, i)
        }
      })
    }
    return this.walk((child, i) => {
      if (child.type === 'decl' && child.prop === prop) {
        return callback(child, i)
      }
    })
  }

  walkRules(selector, callback) {
    if (!callback) {
      callback = selector;

      return this.walk((child, i) => {
        if (child.type === 'rule') {
          return callback(child, i)
        }
      })
    }
    if (selector instanceof RegExp) {
      return this.walk((child, i) => {
        if (child.type === 'rule' && selector.test(child.selector)) {
          return callback(child, i)
        }
      })
    }
    return this.walk((child, i) => {
      if (child.type === 'rule' && child.selector === selector) {
        return callback(child, i)
      }
    })
  }

  walkAtRules(name, callback) {
    if (!callback) {
      callback = name;
      return this.walk((child, i) => {
        if (child.type === 'atrule') {
          return callback(child, i)
        }
      })
    }
    if (name instanceof RegExp) {
      return this.walk((child, i) => {
        if (child.type === 'atrule' && name.test(child.name)) {
          return callback(child, i)
        }
      })
    }
    return this.walk((child, i) => {
      if (child.type === 'atrule' && child.name === name) {
        return callback(child, i)
      }
    })
  }

  walkComments(callback) {
    return this.walk((child, i) => {
      if (child.type === 'comment') {
        return callback(child, i)
      }
    })
  }

  append(...children) {
    for (let child of children) {
      let nodes = this.normalize(child, this.last);
      for (let node of nodes) this.proxyOf.nodes.push(node);
    }

    this.markDirty();

    return this
  }

  prepend(...children) {
    children = children.reverse();
    for (let child of children) {
      let nodes = this.normalize(child, this.first, 'prepend').reverse();
      for (let node of nodes) this.proxyOf.nodes.unshift(node);
      for (let id in this.indexes) {
        this.indexes[id] = this.indexes[id] + nodes.length;
      }
    }

    this.markDirty();

    return this
  }

  cleanRaws(keepBetween) {
    super.cleanRaws(keepBetween);
    if (this.nodes) {
      for (let node of this.nodes) node.cleanRaws(keepBetween);
    }
  }

  insertBefore(exist, add) {
    exist = this.index(exist);

    let type = exist === 0 ? 'prepend' : false;
    let nodes = this.normalize(add, this.proxyOf.nodes[exist], type).reverse();
    for (let node of nodes) this.proxyOf.nodes.splice(exist, 0, node);

    let index;
    for (let id in this.indexes) {
      index = this.indexes[id];
      if (exist <= index) {
        this.indexes[id] = index + nodes.length;
      }
    }

    this.markDirty();

    return this
  }

  insertAfter(exist, add) {
    exist = this.index(exist);

    let nodes = this.normalize(add, this.proxyOf.nodes[exist]).reverse();
    for (let node of nodes) this.proxyOf.nodes.splice(exist + 1, 0, node);

    let index;
    for (let id in this.indexes) {
      index = this.indexes[id];
      if (exist < index) {
        this.indexes[id] = index + nodes.length;
      }
    }

    this.markDirty();

    return this
  }

  removeChild(child) {
    child = this.index(child);
    this.proxyOf.nodes[child].parent = undefined;
    this.proxyOf.nodes.splice(child, 1);

    let index;
    for (let id in this.indexes) {
      index = this.indexes[id];
      if (index >= child) {
        this.indexes[id] = index - 1;
      }
    }

    this.markDirty();

    return this
  }

  removeAll() {
    for (let node of this.proxyOf.nodes) node.parent = undefined;
    this.proxyOf.nodes = [];

    this.markDirty();

    return this
  }

  replaceValues(pattern, opts, callback) {
    if (!callback) {
      callback = opts;
      opts = {};
    }

    this.walkDecls(decl => {
      if (opts.props && !opts.props.includes(decl.prop)) return
      if (opts.fast && !decl.value.includes(opts.fast)) return

      decl.value = decl.value.replace(pattern, callback);
    });

    this.markDirty();

    return this
  }

  every(condition) {
    return this.nodes.every(condition)
  }

  some(condition) {
    return this.nodes.some(condition)
  }

  index(child) {
    if (typeof child === 'number') return child
    if (child.proxyOf) child = child.proxyOf;
    return this.proxyOf.nodes.indexOf(child)
  }

  get first() {
    if (!this.proxyOf.nodes) return undefined
    return this.proxyOf.nodes[0]
  }

  get last() {
    if (!this.proxyOf.nodes) return undefined
    return this.proxyOf.nodes[this.proxyOf.nodes.length - 1]
  }

  normalize(nodes, sample) {
    if (typeof nodes === 'string') {
      nodes = cleanSource(parse$5(nodes).nodes);
    } else if (Array.isArray(nodes)) {
      nodes = nodes.slice(0);
      for (let i of nodes) {
        if (i.parent) i.parent.removeChild(i, 'ignore');
      }
    } else if (nodes.type === 'root' && this.type !== 'document') {
      nodes = nodes.nodes.slice(0);
      for (let i of nodes) {
        if (i.parent) i.parent.removeChild(i, 'ignore');
      }
    } else if (nodes.type) {
      nodes = [nodes];
    } else if (nodes.prop) {
      if (typeof nodes.value === 'undefined') {
        throw new Error('Value field is missed in node creation')
      } else if (typeof nodes.value !== 'string') {
        nodes.value = String(nodes.value);
      }
      nodes = [new declaration(nodes)];
    } else if (nodes.selector) {
      nodes = [new Rule(nodes)];
    } else if (nodes.name) {
      nodes = [new AtRule(nodes)];
    } else if (nodes.text) {
      nodes = [new comment(nodes)];
    } else {
      throw new Error('Unknown node type in node creation')
    }

    let processed = nodes.map(i => {
      /* c8 ignore next */
      if (!i[my$2]) Container.rebuild(i);
      i = i.proxyOf;
      if (i.parent) i.parent.removeChild(i);
      if (i[isClean$2]) markDirtyUp(i);
      if (typeof i.raws.before === 'undefined') {
        if (sample && typeof sample.raws.before !== 'undefined') {
          i.raws.before = sample.raws.before.replace(/\S/g, '');
        }
      }
      i.parent = this;
      return i
    });

    return processed
  }

  getProxyProcessor() {
    return {
      set(node, prop, value) {
        if (node[prop] === value) return true
        node[prop] = value;
        if (prop === 'name' || prop === 'params' || prop === 'selector') {
          node.markDirty();
        }
        return true
      },

      get(node, prop) {
        if (prop === 'proxyOf') {
          return node
        } else if (!node[prop]) {
          return node[prop]
        } else if (
          prop === 'each' ||
          (typeof prop === 'string' && prop.startsWith('walk'))
        ) {
          return (...args) => {
            return node[prop](
              ...args.map(i => {
                if (typeof i === 'function') {
                  return (child, index) => i(child.toProxy(), index)
                } else {
                  return i
                }
              })
            )
          }
        } else if (prop === 'every' || prop === 'some') {
          return cb => {
            return node[prop]((child, ...other) =>
              cb(child.toProxy(), ...other)
            )
          }
        } else if (prop === 'root') {
          return () => node.root().toProxy()
        } else if (prop === 'nodes') {
          return node.nodes.map(i => i.toProxy())
        } else if (prop === 'first' || prop === 'last') {
          return node[prop].toProxy()
        } else {
          return node[prop]
        }
      }
    }
  }

  getIterator() {
    if (!this.lastEach) this.lastEach = 0;
    if (!this.indexes) this.indexes = {};

    this.lastEach += 1;
    let iterator = this.lastEach;
    this.indexes[iterator] = 0;

    return iterator
  }
}

Container.registerParse = dependant => {
  parse$5 = dependant;
};

Container.registerRule = dependant => {
  Rule = dependant;
};

Container.registerAtRule = dependant => {
  AtRule = dependant;
};

var container = Container;
Container.default = Container;

/* c8 ignore start */
Container.rebuild = node => {
  if (node.type === 'atrule') {
    Object.setPrototypeOf(node, AtRule.prototype);
  } else if (node.type === 'rule') {
    Object.setPrototypeOf(node, Rule.prototype);
  } else if (node.type === 'decl') {
    Object.setPrototypeOf(node, declaration.prototype);
  } else if (node.type === 'comment') {
    Object.setPrototypeOf(node, comment.prototype);
  }

  node[my$2] = true;

  if (node.nodes) {
    node.nodes.forEach(child => {
      Container.rebuild(child);
    });
  }
};

let LazyResult, Processor;

class Document extends container {
  constructor(defaults) {
    // type needs to be passed to super, otherwise child roots won't be normalized correctly
    super({ type: 'document', ...defaults });

    if (!this.nodes) {
      this.nodes = [];
    }
  }

  toResult(opts = {}) {
    let lazy = new LazyResult(new Processor(), this, opts);

    return lazy.stringify()
  }
}

Document.registerLazyResult = dependant => {
  LazyResult = dependant;
};

Document.registerProcessor = dependant => {
  Processor = dependant;
};

var document = Document;
Document.default = Document;

/* eslint-disable no-console */

let printed = {};

var warnOnce$2 = function warnOnce(message) {
  if (printed[message]) return
  printed[message] = true;

  if (typeof console !== 'undefined' && console.warn) {
    console.warn(message);
  }
};

class Warning {
  constructor(text, opts = {}) {
    this.type = 'warning';
    this.text = text;

    if (opts.node && opts.node.source) {
      let range = opts.node.rangeBy(opts);
      this.line = range.start.line;
      this.column = range.start.column;
      this.endLine = range.end.line;
      this.endColumn = range.end.column;
    }

    for (let opt in opts) this[opt] = opts[opt];
  }

  toString() {
    if (this.node) {
      return this.node.error(this.text, {
        plugin: this.plugin,
        index: this.index,
        word: this.word
      }).message
    }

    if (this.plugin) {
      return this.plugin + ': ' + this.text
    }

    return this.text
  }
}

var warning = Warning;
Warning.default = Warning;

class Result {
  constructor(processor, root, opts) {
    this.processor = processor;
    this.messages = [];
    this.root = root;
    this.opts = opts;
    this.css = undefined;
    this.map = undefined;
  }

  toString() {
    return this.css
  }

  warn(text, opts = {}) {
    if (!opts.plugin) {
      if (this.lastPlugin && this.lastPlugin.postcssPlugin) {
        opts.plugin = this.lastPlugin.postcssPlugin;
      }
    }

    let warning$1 = new warning(text, opts);
    this.messages.push(warning$1);

    return warning$1
  }

  warnings() {
    return this.messages.filter(i => i.type === 'warning')
  }

  get content() {
    return this.css
  }
}

var result = Result;
Result.default = Result;

class AtRule$1 extends container {
  constructor(defaults) {
    super(defaults);
    this.type = 'atrule';
  }

  append(...children) {
    if (!this.proxyOf.nodes) this.nodes = [];
    return super.append(...children)
  }

  prepend(...children) {
    if (!this.proxyOf.nodes) this.nodes = [];
    return super.prepend(...children)
  }
}

var atRule = AtRule$1;
AtRule$1.default = AtRule$1;

container.registerAtRule(AtRule$1);

let LazyResult$1, Processor$1;

class Root extends container {
  constructor(defaults) {
    super(defaults);
    this.type = 'root';
    if (!this.nodes) this.nodes = [];
  }

  removeChild(child, ignore) {
    let index = this.index(child);

    if (!ignore && index === 0 && this.nodes.length > 1) {
      this.nodes[1].raws.before = this.nodes[index].raws.before;
    }

    return super.removeChild(child)
  }

  normalize(child, sample, type) {
    let nodes = super.normalize(child);

    if (sample) {
      if (type === 'prepend') {
        if (this.nodes.length > 1) {
          sample.raws.before = this.nodes[1].raws.before;
        } else {
          delete sample.raws.before;
        }
      } else if (this.first !== sample) {
        for (let node of nodes) {
          node.raws.before = sample.raws.before;
        }
      }
    }

    return nodes
  }

  toResult(opts = {}) {
    let lazy = new LazyResult$1(new Processor$1(), this, opts);
    return lazy.stringify()
  }
}

Root.registerLazyResult = dependant => {
  LazyResult$1 = dependant;
};

Root.registerProcessor = dependant => {
  Processor$1 = dependant;
};

var root = Root;
Root.default = Root;

let list = {
  split(string, separators, last) {
    let array = [];
    let current = '';
    let split = false;

    let func = 0;
    let quote = false;
    let escape = false;

    for (let letter of string) {
      if (escape) {
        escape = false;
      } else if (letter === '\\') {
        escape = true;
      } else if (quote) {
        if (letter === quote) {
          quote = false;
        }
      } else if (letter === '"' || letter === "'") {
        quote = letter;
      } else if (letter === '(') {
        func += 1;
      } else if (letter === ')') {
        if (func > 0) func -= 1;
      } else if (func === 0) {
        if (separators.includes(letter)) split = true;
      }

      if (split) {
        if (current !== '') array.push(current.trim());
        current = '';
        split = false;
      } else {
        current += letter;
      }
    }

    if (last || current !== '') array.push(current.trim());
    return array
  },

  space(string) {
    let spaces = [' ', '\n', '\t'];
    return list.split(string, spaces)
  },

  comma(string) {
    return list.split(string, [','], true)
  }
};

var list_1 = list;
list.default = list;

class Rule$1 extends container {
  constructor(defaults) {
    super(defaults);
    this.type = 'rule';
    if (!this.nodes) this.nodes = [];
  }

  get selectors() {
    return list_1.comma(this.selector)
  }

  set selectors(values) {
    let match = this.selector ? this.selector.match(/,\s*/) : null;
    let sep = match ? match[0] : ',' + this.raw('between', 'beforeOpen');
    this.selector = values.join(sep);
  }
}

var rule = Rule$1;
Rule$1.default = Rule$1;

container.registerRule(Rule$1);

class Parser$1 {
  constructor(input) {
    this.input = input;

    this.root = new root();
    this.current = this.root;
    this.spaces = '';
    this.semicolon = false;
    this.customProperty = false;

    this.createTokenizer();
    this.root.source = { input, start: { offset: 0, line: 1, column: 1 } };
  }

  createTokenizer() {
    this.tokenizer = tokenize(this.input);
  }

  parse() {
    let token;
    while (!this.tokenizer.endOfFile()) {
      token = this.tokenizer.nextToken();

      switch (token[0]) {
        case 'space':
          this.spaces += token[1];
          break

        case ';':
          this.freeSemicolon(token);
          break

        case '}':
          this.end(token);
          break

        case 'comment':
          this.comment(token);
          break

        case 'at-word':
          this.atrule(token);
          break

        case '{':
          this.emptyRule(token);
          break

        default:
          this.other(token);
          break
      }
    }
    this.endFile();
  }

  comment(token) {
    let node = new comment();
    this.init(node, token[2]);
    node.source.end = this.getPosition(token[3] || token[2]);

    let text = token[1].slice(2, -2);
    if (/^\s*$/.test(text)) {
      node.text = '';
      node.raws.left = text;
      node.raws.right = '';
    } else {
      let match = text.match(/^(\s*)([^]*\S)(\s*)$/);
      node.text = match[2];
      node.raws.left = match[1];
      node.raws.right = match[3];
    }
  }

  emptyRule(token) {
    let node = new rule();
    this.init(node, token[2]);
    node.selector = '';
    node.raws.between = '';
    this.current = node;
  }

  other(start) {
    let end = false;
    let type = null;
    let colon = false;
    let bracket = null;
    let brackets = [];
    let customProperty = start[1].startsWith('--');

    let tokens = [];
    let token = start;
    while (token) {
      type = token[0];
      tokens.push(token);

      if (type === '(' || type === '[') {
        if (!bracket) bracket = token;
        brackets.push(type === '(' ? ')' : ']');
      } else if (customProperty && colon && type === '{') {
        if (!bracket) bracket = token;
        brackets.push('}');
      } else if (brackets.length === 0) {
        if (type === ';') {
          if (colon) {
            this.decl(tokens, customProperty);
            return
          } else {
            break
          }
        } else if (type === '{') {
          this.rule(tokens);
          return
        } else if (type === '}') {
          this.tokenizer.back(tokens.pop());
          end = true;
          break
        } else if (type === ':') {
          colon = true;
        }
      } else if (type === brackets[brackets.length - 1]) {
        brackets.pop();
        if (brackets.length === 0) bracket = null;
      }

      token = this.tokenizer.nextToken();
    }

    if (this.tokenizer.endOfFile()) end = true;
    if (brackets.length > 0) this.unclosedBracket(bracket);

    if (end && colon) {
      while (tokens.length) {
        token = tokens[tokens.length - 1][0];
        if (token !== 'space' && token !== 'comment') break
        this.tokenizer.back(tokens.pop());
      }
      this.decl(tokens, customProperty);
    } else {
      this.unknownWord(tokens);
    }
  }

  rule(tokens) {
    tokens.pop();

    let node = new rule();
    this.init(node, tokens[0][2]);

    node.raws.between = this.spacesAndCommentsFromEnd(tokens);
    this.raw(node, 'selector', tokens);
    this.current = node;
  }

  decl(tokens, customProperty) {
    let node = new declaration();
    this.init(node, tokens[0][2]);

    let last = tokens[tokens.length - 1];
    if (last[0] === ';') {
      this.semicolon = true;
      tokens.pop();
    }
    node.source.end = this.getPosition(last[3] || last[2]);

    while (tokens[0][0] !== 'word') {
      if (tokens.length === 1) this.unknownWord(tokens);
      node.raws.before += tokens.shift()[1];
    }
    node.source.start = this.getPosition(tokens[0][2]);

    node.prop = '';
    while (tokens.length) {
      let type = tokens[0][0];
      if (type === ':' || type === 'space' || type === 'comment') {
        break
      }
      node.prop += tokens.shift()[1];
    }

    node.raws.between = '';

    let token;
    while (tokens.length) {
      token = tokens.shift();

      if (token[0] === ':') {
        node.raws.between += token[1];
        break
      } else {
        if (token[0] === 'word' && /\w/.test(token[1])) {
          this.unknownWord([token]);
        }
        node.raws.between += token[1];
      }
    }

    if (node.prop[0] === '_' || node.prop[0] === '*') {
      node.raws.before += node.prop[0];
      node.prop = node.prop.slice(1);
    }
    let firstSpaces = this.spacesAndCommentsFromStart(tokens);
    this.precheckMissedSemicolon(tokens);

    for (let i = tokens.length - 1; i >= 0; i--) {
      token = tokens[i];
      if (token[1].toLowerCase() === '!important') {
        node.important = true;
        let string = this.stringFrom(tokens, i);
        string = this.spacesFromEnd(tokens) + string;
        if (string !== ' !important') node.raws.important = string;
        break
      } else if (token[1].toLowerCase() === 'important') {
        let cache = tokens.slice(0);
        let str = '';
        for (let j = i; j > 0; j--) {
          let type = cache[j][0];
          if (str.trim().indexOf('!') === 0 && type !== 'space') {
            break
          }
          str = cache.pop()[1] + str;
        }
        if (str.trim().indexOf('!') === 0) {
          node.important = true;
          node.raws.important = str;
          tokens = cache;
        }
      }

      if (token[0] !== 'space' && token[0] !== 'comment') {
        break
      }
    }

    let hasWord = tokens.some(i => i[0] !== 'space' && i[0] !== 'comment');
    this.raw(node, 'value', tokens);
    if (hasWord) {
      node.raws.between += firstSpaces;
    } else {
      node.value = firstSpaces + node.value;
    }

    if (node.value.includes(':') && !customProperty) {
      this.checkMissedSemicolon(tokens);
    }
  }

  atrule(token) {
    let node = new atRule();
    node.name = token[1].slice(1);
    if (node.name === '') {
      this.unnamedAtrule(node, token);
    }
    this.init(node, token[2]);

    let type;
    let prev;
    let shift;
    let last = false;
    let open = false;
    let params = [];
    let brackets = [];

    while (!this.tokenizer.endOfFile()) {
      token = this.tokenizer.nextToken();
      type = token[0];

      if (type === '(' || type === '[') {
        brackets.push(type === '(' ? ')' : ']');
      } else if (type === '{' && brackets.length > 0) {
        brackets.push('}');
      } else if (type === brackets[brackets.length - 1]) {
        brackets.pop();
      }

      if (brackets.length === 0) {
        if (type === ';') {
          node.source.end = this.getPosition(token[2]);
          this.semicolon = true;
          break
        } else if (type === '{') {
          open = true;
          break
        } else if (type === '}') {
          if (params.length > 0) {
            shift = params.length - 1;
            prev = params[shift];
            while (prev && prev[0] === 'space') {
              prev = params[--shift];
            }
            if (prev) {
              node.source.end = this.getPosition(prev[3] || prev[2]);
            }
          }
          this.end(token);
          break
        } else {
          params.push(token);
        }
      } else {
        params.push(token);
      }

      if (this.tokenizer.endOfFile()) {
        last = true;
        break
      }
    }

    node.raws.between = this.spacesAndCommentsFromEnd(params);
    if (params.length) {
      node.raws.afterName = this.spacesAndCommentsFromStart(params);
      this.raw(node, 'params', params);
      if (last) {
        token = params[params.length - 1];
        node.source.end = this.getPosition(token[3] || token[2]);
        this.spaces = node.raws.between;
        node.raws.between = '';
      }
    } else {
      node.raws.afterName = '';
      node.params = '';
    }

    if (open) {
      node.nodes = [];
      this.current = node;
    }
  }

  end(token) {
    if (this.current.nodes && this.current.nodes.length) {
      this.current.raws.semicolon = this.semicolon;
    }
    this.semicolon = false;

    this.current.raws.after = (this.current.raws.after || '') + this.spaces;
    this.spaces = '';

    if (this.current.parent) {
      this.current.source.end = this.getPosition(token[2]);
      this.current = this.current.parent;
    } else {
      this.unexpectedClose(token);
    }
  }

  endFile() {
    if (this.current.parent) this.unclosedBlock();
    if (this.current.nodes && this.current.nodes.length) {
      this.current.raws.semicolon = this.semicolon;
    }
    this.current.raws.after = (this.current.raws.after || '') + this.spaces;
  }

  freeSemicolon(token) {
    this.spaces += token[1];
    if (this.current.nodes) {
      let prev = this.current.nodes[this.current.nodes.length - 1];
      if (prev && prev.type === 'rule' && !prev.raws.ownSemicolon) {
        prev.raws.ownSemicolon = this.spaces;
        this.spaces = '';
      }
    }
  }

  // Helpers

  getPosition(offset) {
    let pos = this.input.fromOffset(offset);
    return {
      offset,
      line: pos.line,
      column: pos.col
    }
  }

  init(node, offset) {
    this.current.push(node);
    node.source = {
      start: this.getPosition(offset),
      input: this.input
    };
    node.raws.before = this.spaces;
    this.spaces = '';
    if (node.type !== 'comment') this.semicolon = false;
  }

  raw(node, prop, tokens) {
    let token, type;
    let length = tokens.length;
    let value = '';
    let clean = true;
    let next, prev;
    let pattern = /^([#.|])?(\w)+/i;

    for (let i = 0; i < length; i += 1) {
      token = tokens[i];
      type = token[0];

      if (type === 'comment' && node.type === 'rule') {
        prev = tokens[i - 1];
        next = tokens[i + 1];

        if (
          prev[0] !== 'space' &&
          next[0] !== 'space' &&
          pattern.test(prev[1]) &&
          pattern.test(next[1])
        ) {
          value += token[1];
        } else {
          clean = false;
        }

        continue
      }

      if (type === 'comment' || (type === 'space' && i === length - 1)) {
        clean = false;
      } else {
        value += token[1];
      }
    }
    if (!clean) {
      let raw = tokens.reduce((all, i) => all + i[1], '');
      node.raws[prop] = { value, raw };
    }
    node[prop] = value;
  }

  spacesAndCommentsFromEnd(tokens) {
    let lastTokenType;
    let spaces = '';
    while (tokens.length) {
      lastTokenType = tokens[tokens.length - 1][0];
      if (lastTokenType !== 'space' && lastTokenType !== 'comment') break
      spaces = tokens.pop()[1] + spaces;
    }
    return spaces
  }

  spacesAndCommentsFromStart(tokens) {
    let next;
    let spaces = '';
    while (tokens.length) {
      next = tokens[0][0];
      if (next !== 'space' && next !== 'comment') break
      spaces += tokens.shift()[1];
    }
    return spaces
  }

  spacesFromEnd(tokens) {
    let lastTokenType;
    let spaces = '';
    while (tokens.length) {
      lastTokenType = tokens[tokens.length - 1][0];
      if (lastTokenType !== 'space') break
      spaces = tokens.pop()[1] + spaces;
    }
    return spaces
  }

  stringFrom(tokens, from) {
    let result = '';
    for (let i = from; i < tokens.length; i++) {
      result += tokens[i][1];
    }
    tokens.splice(from, tokens.length - from);
    return result
  }

  colon(tokens) {
    let brackets = 0;
    let token, type, prev;
    for (let [i, element] of tokens.entries()) {
      token = element;
      type = token[0];

      if (type === '(') {
        brackets += 1;
      }
      if (type === ')') {
        brackets -= 1;
      }
      if (brackets === 0 && type === ':') {
        if (!prev) {
          this.doubleColon(token);
        } else if (prev[0] === 'word' && prev[1] === 'progid') {
          continue
        } else {
          return i
        }
      }

      prev = token;
    }
    return false
  }

  // Errors

  unclosedBracket(bracket) {
    throw this.input.error(
      'Unclosed bracket',
      { offset: bracket[2] },
      { offset: bracket[2] + 1 }
    )
  }

  unknownWord(tokens) {
    throw this.input.error(
      'Unknown word',
      { offset: tokens[0][2] },
      { offset: tokens[0][2] + tokens[0][1].length }
    )
  }

  unexpectedClose(token) {
    throw this.input.error(
      'Unexpected }',
      { offset: token[2] },
      { offset: token[2] + 1 }
    )
  }

  unclosedBlock() {
    let pos = this.current.source.start;
    throw this.input.error('Unclosed block', pos.line, pos.column)
  }

  doubleColon(token) {
    throw this.input.error(
      'Double colon',
      { offset: token[2] },
      { offset: token[2] + token[1].length }
    )
  }

  unnamedAtrule(node, token) {
    throw this.input.error(
      'At-rule without name',
      { offset: token[2] },
      { offset: token[2] + token[1].length }
    )
  }

  precheckMissedSemicolon(/* tokens */) {
    // Hook for Safe Parser
  }

  checkMissedSemicolon(tokens) {
    let colon = this.colon(tokens);
    if (colon === false) return

    let founded = 0;
    let token;
    for (let j = colon - 1; j >= 0; j--) {
      token = tokens[j];
      if (token[0] !== 'space') {
        founded += 1;
        if (founded === 2) break
      }
    }
    // If the token is a word, e.g. `!important`, `red` or any other valid property's value.
    // Then we need to return the colon after that word token. [3] is the "end" colon of that word.
    // And because we need it after that one we do +1 to get the next one.
    throw this.input.error(
      'Missed semicolon',
      token[0] === 'word' ? token[3] + 1 : token[2]
    )
  }
}

var parser = Parser$1;

function parse$6(css, opts) {
  let input$1 = new input(css, opts);
  let parser$1 = new parser(input$1);
  try {
    parser$1.parse();
  } catch (e) {
    {
      if (e.name === 'CssSyntaxError' && opts && opts.from) {
        if (/\.scss$/i.test(opts.from)) {
          e.message +=
            '\nYou tried to parse SCSS with ' +
            'the standard CSS parser; ' +
            'try again with the postcss-scss parser';
        } else if (/\.sass/i.test(opts.from)) {
          e.message +=
            '\nYou tried to parse Sass with ' +
            'the standard CSS parser; ' +
            'try again with the postcss-sass parser';
        } else if (/\.less$/i.test(opts.from)) {
          e.message +=
            '\nYou tried to parse Less with ' +
            'the standard CSS parser; ' +
            'try again with the postcss-less parser';
        }
      }
    }
    throw e
  }

  return parser$1.root
}

var parse_1$1 = parse$6;
parse$6.default = parse$6;

container.registerParse(parse$6);

let { isClean: isClean$3, my: my$3 } = symbols;









const TYPE_TO_CLASS_NAME = {
  document: 'Document',
  root: 'Root',
  atrule: 'AtRule',
  rule: 'Rule',
  decl: 'Declaration',
  comment: 'Comment'
};

const PLUGIN_PROPS = {
  postcssPlugin: true,
  prepare: true,
  Once: true,
  Document: true,
  Root: true,
  Declaration: true,
  Rule: true,
  AtRule: true,
  Comment: true,
  DeclarationExit: true,
  RuleExit: true,
  AtRuleExit: true,
  CommentExit: true,
  RootExit: true,
  DocumentExit: true,
  OnceExit: true
};

const NOT_VISITORS = {
  postcssPlugin: true,
  prepare: true,
  Once: true
};

const CHILDREN = 0;

function isPromise(obj) {
  return typeof obj === 'object' && typeof obj.then === 'function'
}

function getEvents(node) {
  let key = false;
  let type = TYPE_TO_CLASS_NAME[node.type];
  if (node.type === 'decl') {
    key = node.prop.toLowerCase();
  } else if (node.type === 'atrule') {
    key = node.name.toLowerCase();
  }

  if (key && node.append) {
    return [
      type,
      type + '-' + key,
      CHILDREN,
      type + 'Exit',
      type + 'Exit-' + key
    ]
  } else if (key) {
    return [type, type + '-' + key, type + 'Exit', type + 'Exit-' + key]
  } else if (node.append) {
    return [type, CHILDREN, type + 'Exit']
  } else {
    return [type, type + 'Exit']
  }
}

function toStack(node) {
  let events;
  if (node.type === 'document') {
    events = ['Document', CHILDREN, 'DocumentExit'];
  } else if (node.type === 'root') {
    events = ['Root', CHILDREN, 'RootExit'];
  } else {
    events = getEvents(node);
  }

  return {
    node,
    events,
    eventIndex: 0,
    visitors: [],
    visitorIndex: 0,
    iterator: 0
  }
}

function cleanMarks(node) {
  node[isClean$3] = false;
  if (node.nodes) node.nodes.forEach(i => cleanMarks(i));
  return node
}

let postcss = {};

class LazyResult$2 {
  constructor(processor, css, opts) {
    this.stringified = false;
    this.processed = false;

    let root;
    if (
      typeof css === 'object' &&
      css !== null &&
      (css.type === 'root' || css.type === 'document')
    ) {
      root = cleanMarks(css);
    } else if (css instanceof LazyResult$2 || css instanceof result) {
      root = cleanMarks(css.root);
      if (css.map) {
        if (typeof opts.map === 'undefined') opts.map = {};
        if (!opts.map.inline) opts.map.inline = false;
        opts.map.prev = css.map;
      }
    } else {
      let parser = parse_1$1;
      if (opts.syntax) parser = opts.syntax.parse;
      if (opts.parser) parser = opts.parser;
      if (parser.parse) parser = parser.parse;

      try {
        root = parser(css, opts);
      } catch (error) {
        this.processed = true;
        this.error = error;
      }

      if (root && !root[my$3]) {
        /* c8 ignore next 2 */
        container.rebuild(root);
      }
    }

    this.result = new result(processor, root, opts);
    this.helpers = { ...postcss, result: this.result, postcss };
    this.plugins = this.processor.plugins.map(plugin => {
      if (typeof plugin === 'object' && plugin.prepare) {
        return { ...plugin, ...plugin.prepare(this.result) }
      } else {
        return plugin
      }
    });
  }

  get [Symbol.toStringTag]() {
    return 'LazyResult'
  }

  get processor() {
    return this.result.processor
  }

  get opts() {
    return this.result.opts
  }

  get css() {
    return this.stringify().css
  }

  get content() {
    return this.stringify().content
  }

  get map() {
    return this.stringify().map
  }

  get root() {
    return this.sync().root
  }

  get messages() {
    return this.sync().messages
  }

  warnings() {
    return this.sync().warnings()
  }

  toString() {
    return this.css
  }

  then(onFulfilled, onRejected) {
    {
      if (!('from' in this.opts)) {
        warnOnce$2(
          'Without `from` option PostCSS could generate wrong source map ' +
            'and will not find Browserslist config. Set it to CSS file path ' +
            'or to `undefined` to prevent this warning.'
        );
      }
    }
    return this.async().then(onFulfilled, onRejected)
  }

  catch(onRejected) {
    return this.async().catch(onRejected)
  }

  finally(onFinally) {
    return this.async().then(onFinally, onFinally)
  }

  async() {
    if (this.error) return Promise.reject(this.error)
    if (this.processed) return Promise.resolve(this.result)
    if (!this.processing) {
      this.processing = this.runAsync();
    }
    return this.processing
  }

  sync() {
    if (this.error) throw this.error
    if (this.processed) return this.result
    this.processed = true;

    if (this.processing) {
      throw this.getAsyncError()
    }

    for (let plugin of this.plugins) {
      let promise = this.runOnRoot(plugin);
      if (isPromise(promise)) {
        throw this.getAsyncError()
      }
    }

    this.prepareVisitors();
    if (this.hasListener) {
      let root = this.result.root;
      while (!root[isClean$3]) {
        root[isClean$3] = true;
        this.walkSync(root);
      }
      if (this.listeners.OnceExit) {
        if (root.type === 'document') {
          for (let subRoot of root.nodes) {
            this.visitSync(this.listeners.OnceExit, subRoot);
          }
        } else {
          this.visitSync(this.listeners.OnceExit, root);
        }
      }
    }

    return this.result
  }

  stringify() {
    if (this.error) throw this.error
    if (this.stringified) return this.result
    this.stringified = true;

    this.sync();

    let opts = this.result.opts;
    let str = stringify_1;
    if (opts.syntax) str = opts.syntax.stringify;
    if (opts.stringifier) str = opts.stringifier;
    if (str.stringify) str = str.stringify;

    let map = new mapGenerator(str, this.result.root, this.result.opts);
    let data = map.generate();
    this.result.css = data[0];
    this.result.map = data[1];

    return this.result
  }

  walkSync(node) {
    node[isClean$3] = true;
    let events = getEvents(node);
    for (let event of events) {
      if (event === CHILDREN) {
        if (node.nodes) {
          node.each(child => {
            if (!child[isClean$3]) this.walkSync(child);
          });
        }
      } else {
        let visitors = this.listeners[event];
        if (visitors) {
          if (this.visitSync(visitors, node.toProxy())) return
        }
      }
    }
  }

  visitSync(visitors, node) {
    for (let [plugin, visitor] of visitors) {
      this.result.lastPlugin = plugin;
      let promise;
      try {
        promise = visitor(node, this.helpers);
      } catch (e) {
        throw this.handleError(e, node.proxyOf)
      }
      if (node.type !== 'root' && node.type !== 'document' && !node.parent) {
        return true
      }
      if (isPromise(promise)) {
        throw this.getAsyncError()
      }
    }
  }

  runOnRoot(plugin) {
    this.result.lastPlugin = plugin;
    try {
      if (typeof plugin === 'object' && plugin.Once) {
        if (this.result.root.type === 'document') {
          let roots = this.result.root.nodes.map(root =>
            plugin.Once(root, this.helpers)
          );

          if (isPromise(roots[0])) {
            return Promise.all(roots)
          }

          return roots
        }

        return plugin.Once(this.result.root, this.helpers)
      } else if (typeof plugin === 'function') {
        return plugin(this.result.root, this.result)
      }
    } catch (error) {
      throw this.handleError(error)
    }
  }

  getAsyncError() {
    throw new Error('Use process(css).then(cb) to work with async plugins')
  }

  handleError(error, node) {
    let plugin = this.result.lastPlugin;
    try {
      if (node) node.addToError(error);
      this.error = error;
      if (error.name === 'CssSyntaxError' && !error.plugin) {
        error.plugin = plugin.postcssPlugin;
        error.setMessage();
      } else if (plugin.postcssVersion) {
        if (({}).NODE_ENV !== 'production') {
          let pluginName = plugin.postcssPlugin;
          let pluginVer = plugin.postcssVersion;
          let runtimeVer = this.result.processor.version;
          let a = pluginVer.split('.');
          let b = runtimeVer.split('.');

          if (a[0] !== b[0] || parseInt(a[1]) > parseInt(b[1])) {
            // eslint-disable-next-line no-console
            console.error(
              'Unknown error from PostCSS plugin. Your current PostCSS ' +
                'version is ' +
                runtimeVer +
                ', but ' +
                pluginName +
                ' uses ' +
                pluginVer +
                '. Perhaps this is the source of the error below.'
            );
          }
        }
      }
    } catch (err) {
      /* c8 ignore next 3 */
      // eslint-disable-next-line no-console
      if (console && console.error) console.error(err);
    }
    return error
  }

  async runAsync() {
    this.plugin = 0;
    for (let i = 0; i < this.plugins.length; i++) {
      let plugin = this.plugins[i];
      let promise = this.runOnRoot(plugin);
      if (isPromise(promise)) {
        try {
          await promise;
        } catch (error) {
          throw this.handleError(error)
        }
      }
    }

    this.prepareVisitors();
    if (this.hasListener) {
      let root = this.result.root;
      while (!root[isClean$3]) {
        root[isClean$3] = true;
        let stack = [toStack(root)];
        while (stack.length > 0) {
          let promise = this.visitTick(stack);
          if (isPromise(promise)) {
            try {
              await promise;
            } catch (e) {
              let node = stack[stack.length - 1].node;
              throw this.handleError(e, node)
            }
          }
        }
      }

      if (this.listeners.OnceExit) {
        for (let [plugin, visitor] of this.listeners.OnceExit) {
          this.result.lastPlugin = plugin;
          try {
            if (root.type === 'document') {
              let roots = root.nodes.map(subRoot =>
                visitor(subRoot, this.helpers)
              );

              await Promise.all(roots);
            } else {
              await visitor(root, this.helpers);
            }
          } catch (e) {
            throw this.handleError(e)
          }
        }
      }
    }

    this.processed = true;
    return this.stringify()
  }

  prepareVisitors() {
    this.listeners = {};
    let add = (plugin, type, cb) => {
      if (!this.listeners[type]) this.listeners[type] = [];
      this.listeners[type].push([plugin, cb]);
    };
    for (let plugin of this.plugins) {
      if (typeof plugin === 'object') {
        for (let event in plugin) {
          if (!PLUGIN_PROPS[event] && /^[A-Z]/.test(event)) {
            throw new Error(
              `Unknown event ${event} in ${plugin.postcssPlugin}. ` +
                `Try to update PostCSS (${this.processor.version} now).`
            )
          }
          if (!NOT_VISITORS[event]) {
            if (typeof plugin[event] === 'object') {
              for (let filter in plugin[event]) {
                if (filter === '*') {
                  add(plugin, event, plugin[event][filter]);
                } else {
                  add(
                    plugin,
                    event + '-' + filter.toLowerCase(),
                    plugin[event][filter]
                  );
                }
              }
            } else if (typeof plugin[event] === 'function') {
              add(plugin, event, plugin[event]);
            }
          }
        }
      }
    }
    this.hasListener = Object.keys(this.listeners).length > 0;
  }

  visitTick(stack) {
    let visit = stack[stack.length - 1];
    let { node, visitors } = visit;

    if (node.type !== 'root' && node.type !== 'document' && !node.parent) {
      stack.pop();
      return
    }

    if (visitors.length > 0 && visit.visitorIndex < visitors.length) {
      let [plugin, visitor] = visitors[visit.visitorIndex];
      visit.visitorIndex += 1;
      if (visit.visitorIndex === visitors.length) {
        visit.visitors = [];
        visit.visitorIndex = 0;
      }
      this.result.lastPlugin = plugin;
      try {
        return visitor(node.toProxy(), this.helpers)
      } catch (e) {
        throw this.handleError(e, node)
      }
    }

    if (visit.iterator !== 0) {
      let iterator = visit.iterator;
      let child;
      while ((child = node.nodes[node.indexes[iterator]])) {
        node.indexes[iterator] += 1;
        if (!child[isClean$3]) {
          child[isClean$3] = true;
          stack.push(toStack(child));
          return
        }
      }
      visit.iterator = 0;
      delete node.indexes[iterator];
    }

    let events = visit.events;
    while (visit.eventIndex < events.length) {
      let event = events[visit.eventIndex];
      visit.eventIndex += 1;
      if (event === CHILDREN) {
        if (node.nodes && node.nodes.length) {
          node[isClean$3] = true;
          visit.iterator = node.getIterator();
        }
        return
      } else if (this.listeners[event]) {
        visit.visitors = this.listeners[event];
        return
      }
    }
    stack.pop();
  }
}

LazyResult$2.registerPostcss = dependant => {
  postcss = dependant;
};

var lazyResult = LazyResult$2;
LazyResult$2.default = LazyResult$2;

root.registerLazyResult(LazyResult$2);
document.registerLazyResult(LazyResult$2);

class NoWorkResult {
  constructor(processor, css, opts) {
    css = css.toString();
    this.stringified = false;

    this._processor = processor;
    this._css = css;
    this._opts = opts;
    this._map = undefined;
    let root;

    let str = stringify_1;
    this.result = new result(this._processor, root, this._opts);
    this.result.css = css;

    let self = this;
    Object.defineProperty(this.result, 'root', {
      get() {
        return self.root
      }
    });

    let map = new mapGenerator(str, root, this._opts, css);
    if (map.isMap()) {
      let [generatedCSS, generatedMap] = map.generate();
      if (generatedCSS) {
        this.result.css = generatedCSS;
      }
      if (generatedMap) {
        this.result.map = generatedMap;
      }
    }
  }

  get [Symbol.toStringTag]() {
    return 'NoWorkResult'
  }

  get processor() {
    return this.result.processor
  }

  get opts() {
    return this.result.opts
  }

  get css() {
    return this.result.css
  }

  get content() {
    return this.result.css
  }

  get map() {
    return this.result.map
  }

  get root() {
    if (this._root) {
      return this._root
    }

    let root;
    let parser = parse_1$1;

    try {
      root = parser(this._css, this._opts);
    } catch (error) {
      this.error = error;
    }

    this._root = root;

    return root
  }

  get messages() {
    return []
  }

  warnings() {
    return []
  }

  toString() {
    return this._css
  }

  then(onFulfilled, onRejected) {
    {
      if (!('from' in this._opts)) {
        warnOnce$2(
          'Without `from` option PostCSS could generate wrong source map ' +
            'and will not find Browserslist config. Set it to CSS file path ' +
            'or to `undefined` to prevent this warning.'
        );
      }
    }

    return this.async().then(onFulfilled, onRejected)
  }

  catch(onRejected) {
    return this.async().catch(onRejected)
  }

  finally(onFinally) {
    return this.async().then(onFinally, onFinally)
  }

  async() {
    if (this.error) return Promise.reject(this.error)
    return Promise.resolve(this.result)
  }

  sync() {
    if (this.error) throw this.error
    return this.result
  }
}

var noWorkResult = NoWorkResult;
NoWorkResult.default = NoWorkResult;

class Processor$2 {
  constructor(plugins = []) {
    this.version = '8.4.4';
    this.plugins = this.normalize(plugins);
  }

  use(plugin) {
    this.plugins = this.plugins.concat(this.normalize([plugin]));
    return this
  }

  process(css, opts = {}) {
    if (
      this.plugins.length === 0 &&
      typeof opts.parser === 'undefined' &&
      typeof opts.stringifier === 'undefined' &&
      typeof opts.syntax === 'undefined'
    ) {
      return new noWorkResult(this, css, opts)
    } else {
      return new lazyResult(this, css, opts)
    }
  }

  normalize(plugins) {
    let normalized = [];
    for (let i of plugins) {
      if (i.postcss === true) {
        i = i();
      } else if (i.postcss) {
        i = i.postcss;
      }

      if (typeof i === 'object' && Array.isArray(i.plugins)) {
        normalized = normalized.concat(i.plugins);
      } else if (typeof i === 'object' && i.postcssPlugin) {
        normalized.push(i);
      } else if (typeof i === 'function') {
        normalized.push(i);
      } else if (typeof i === 'object' && (i.parse || i.stringify)) {
        {
          throw new Error(
            'PostCSS syntaxes cannot be used as plugins. Instead, please use ' +
              'one of the syntax/parser/stringifier options as outlined ' +
              'in your PostCSS runner documentation.'
          )
        }
      } else {
        throw new Error(i + ' is not a PostCSS plugin')
      }
    }
    return normalized
  }
}

var processor = Processor$2;
Processor$2.default = Processor$2;

root.registerProcessor(Processor$2);
document.registerProcessor(Processor$2);

function fromJSON(json, inputs) {
  if (Array.isArray(json)) return json.map(n => fromJSON(n))

  let { inputs: ownInputs, ...defaults } = json;
  if (ownInputs) {
    inputs = [];
    for (let input$1 of ownInputs) {
      let inputHydrated = { ...input$1, __proto__: input.prototype };
      if (inputHydrated.map) {
        inputHydrated.map = {
          ...inputHydrated.map,
          __proto__: previousMap.prototype
        };
      }
      inputs.push(inputHydrated);
    }
  }
  if (defaults.nodes) {
    defaults.nodes = json.nodes.map(n => fromJSON(n, inputs));
  }
  if (defaults.source) {
    let { inputId, ...source } = defaults.source;
    defaults.source = source;
    if (inputId != null) {
      defaults.source.input = inputs[inputId];
    }
  }
  if (defaults.type === 'root') {
    return new root(defaults)
  } else if (defaults.type === 'decl') {
    return new declaration(defaults)
  } else if (defaults.type === 'rule') {
    return new rule(defaults)
  } else if (defaults.type === 'comment') {
    return new comment(defaults)
  } else if (defaults.type === 'atrule') {
    return new atRule(defaults)
  } else {
    throw new Error('Unknown node type: ' + json.type)
  }
}

var fromJSON_1 = fromJSON;
fromJSON.default = fromJSON;

function postcss$1(...plugins) {
  if (plugins.length === 1 && Array.isArray(plugins[0])) {
    plugins = plugins[0];
  }
  return new processor(plugins)
}

postcss$1.plugin = function plugin(name, initializer) {
  // eslint-disable-next-line no-console
  if (console && console.warn) {
    // eslint-disable-next-line no-console
    console.warn(
      name +
        ': postcss.plugin was deprecated. Migration guide:\n' +
        'https://evilmartians.com/chronicles/postcss-8-plugin-migration'
    );
  }
  function creator(...args) {
    let transformer = initializer(...args);
    transformer.postcssPlugin = name;
    transformer.postcssVersion = new processor().version;
    return transformer
  }

  let cache;
  Object.defineProperty(creator, 'postcss', {
    get() {
      if (!cache) cache = creator();
      return cache
    }
  });

  creator.process = function (css, processOpts, pluginOpts) {
    return postcss$1([creator(pluginOpts)]).process(css, processOpts)
  };

  return creator
};

postcss$1.stringify = stringify_1;
postcss$1.parse = parse_1$1;
postcss$1.fromJSON = fromJSON_1;
postcss$1.list = list_1;

postcss$1.comment = defaults => new comment(defaults);
postcss$1.atRule = defaults => new atRule(defaults);
postcss$1.decl = defaults => new declaration(defaults);
postcss$1.rule = defaults => new rule(defaults);
postcss$1.root = defaults => new root(defaults);
postcss$1.document = defaults => new document(defaults);

postcss$1.CssSyntaxError = cssSyntaxError;
postcss$1.Declaration = declaration;
postcss$1.Container = container;
postcss$1.Processor = processor;
postcss$1.Document = document;
postcss$1.Comment = comment;
postcss$1.Warning = warning;
postcss$1.AtRule = atRule;
postcss$1.Result = result;
postcss$1.Input = input;
postcss$1.Rule = rule;
postcss$1.Root = root;
postcss$1.Node = node_1;

lazyResult.registerPostcss(postcss$1);

var postcss_1 = postcss$1;
postcss$1.default = postcss$1;

const trimPlugin = () => {
    return {
        postcssPlugin: 'vue-sfc-trim',
        Once(root) {
            root.walk(({ type, raws }) => {
                if (type === 'rule' || type === 'atrule') {
                    if (raws.before)
                        raws.before = '\n';
                    if ('after' in raws && raws.after)
                        raws.after = '\n';
                }
            });
        }
    };
};
trimPlugin.postcss = true;

var unesc_1 = createCommonjsModule(function (module, exports) {

exports.__esModule = true;
exports["default"] = unesc;

// Many thanks for this post which made this migration much easier.
// https://mathiasbynens.be/notes/css-escapes

/**
 * 
 * @param {string} str 
 * @returns {[string, number]|undefined}
 */
function gobbleHex(str) {
  var lower = str.toLowerCase();
  var hex = '';
  var spaceTerminated = false;

  for (var i = 0; i < 6 && lower[i] !== undefined; i++) {
    var code = lower.charCodeAt(i); // check to see if we are dealing with a valid hex char [a-f|0-9]

    var valid = code >= 97 && code <= 102 || code >= 48 && code <= 57; // https://drafts.csswg.org/css-syntax/#consume-escaped-code-point

    spaceTerminated = code === 32;

    if (!valid) {
      break;
    }

    hex += lower[i];
  }

  if (hex.length === 0) {
    return undefined;
  }

  var codePoint = parseInt(hex, 16);
  var isSurrogate = codePoint >= 0xD800 && codePoint <= 0xDFFF; // Add special case for
  // "If this number is zero, or is for a surrogate, or is greater than the maximum allowed code point"
  // https://drafts.csswg.org/css-syntax/#maximum-allowed-code-point

  if (isSurrogate || codePoint === 0x0000 || codePoint > 0x10FFFF) {
    return ["\uFFFD", hex.length + (spaceTerminated ? 1 : 0)];
  }

  return [String.fromCodePoint(codePoint), hex.length + (spaceTerminated ? 1 : 0)];
}

var CONTAINS_ESCAPE = /\\/;

function unesc(str) {
  var needToProcess = CONTAINS_ESCAPE.test(str);

  if (!needToProcess) {
    return str;
  }

  var ret = "";

  for (var i = 0; i < str.length; i++) {
    if (str[i] === "\\") {
      var gobbled = gobbleHex(str.slice(i + 1, i + 7));

      if (gobbled !== undefined) {
        ret += gobbled[0];
        i += gobbled[1];
        continue;
      } // Retain a pair of \\ if double escaped `\\\\`
      // https://github.com/postcss/postcss-selector-parser/commit/268c9a7656fb53f543dc620aa5b73a30ec3ff20e


      if (str[i + 1] === "\\") {
        ret += "\\";
        i++;
        continue;
      } // if \\ is at the end of the string retain it
      // https://github.com/postcss/postcss-selector-parser/commit/01a6b346e3612ce1ab20219acc26abdc259ccefb


      if (str.length === i + 1) {
        ret += str[i];
      }

      continue;
    }

    ret += str[i];
  }

  return ret;
}

module.exports = exports.default;
});

var getProp_1 = createCommonjsModule(function (module, exports) {

exports.__esModule = true;
exports["default"] = getProp;

function getProp(obj) {
  for (var _len = arguments.length, props = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
    props[_key - 1] = arguments[_key];
  }

  while (props.length > 0) {
    var prop = props.shift();

    if (!obj[prop]) {
      return undefined;
    }

    obj = obj[prop];
  }

  return obj;
}

module.exports = exports.default;
});

var ensureObject_1 = createCommonjsModule(function (module, exports) {

exports.__esModule = true;
exports["default"] = ensureObject;

function ensureObject(obj) {
  for (var _len = arguments.length, props = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
    props[_key - 1] = arguments[_key];
  }

  while (props.length > 0) {
    var prop = props.shift();

    if (!obj[prop]) {
      obj[prop] = {};
    }

    obj = obj[prop];
  }
}

module.exports = exports.default;
});

var stripComments_1 = createCommonjsModule(function (module, exports) {

exports.__esModule = true;
exports["default"] = stripComments;

function stripComments(str) {
  var s = "";
  var commentStart = str.indexOf("/*");
  var lastEnd = 0;

  while (commentStart >= 0) {
    s = s + str.slice(lastEnd, commentStart);
    var commentEnd = str.indexOf("*/", commentStart + 2);

    if (commentEnd < 0) {
      return s;
    }

    lastEnd = commentEnd + 2;
    commentStart = str.indexOf("/*", lastEnd);
  }

  s = s + str.slice(lastEnd);
  return s;
}

module.exports = exports.default;
});

var util$2 = createCommonjsModule(function (module, exports) {

exports.__esModule = true;
exports.stripComments = exports.ensureObject = exports.getProp = exports.unesc = void 0;

var _unesc = _interopRequireDefault(unesc_1);

exports.unesc = _unesc["default"];

var _getProp = _interopRequireDefault(getProp_1);

exports.getProp = _getProp["default"];

var _ensureObject = _interopRequireDefault(ensureObject_1);

exports.ensureObject = _ensureObject["default"];

var _stripComments = _interopRequireDefault(stripComments_1);

exports.stripComments = _stripComments["default"];

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }
});

var node = createCommonjsModule(function (module, exports) {

exports.__esModule = true;
exports["default"] = void 0;



function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }

function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }

var cloneNode = function cloneNode(obj, parent) {
  if (typeof obj !== 'object' || obj === null) {
    return obj;
  }

  var cloned = new obj.constructor();

  for (var i in obj) {
    if (!obj.hasOwnProperty(i)) {
      continue;
    }

    var value = obj[i];
    var type = typeof value;

    if (i === 'parent' && type === 'object') {
      if (parent) {
        cloned[i] = parent;
      }
    } else if (value instanceof Array) {
      cloned[i] = value.map(function (j) {
        return cloneNode(j, cloned);
      });
    } else {
      cloned[i] = cloneNode(value, cloned);
    }
  }

  return cloned;
};

var Node = /*#__PURE__*/function () {
  function Node(opts) {
    if (opts === void 0) {
      opts = {};
    }

    Object.assign(this, opts);
    this.spaces = this.spaces || {};
    this.spaces.before = this.spaces.before || '';
    this.spaces.after = this.spaces.after || '';
  }

  var _proto = Node.prototype;

  _proto.remove = function remove() {
    if (this.parent) {
      this.parent.removeChild(this);
    }

    this.parent = undefined;
    return this;
  };

  _proto.replaceWith = function replaceWith() {
    if (this.parent) {
      for (var index in arguments) {
        this.parent.insertBefore(this, arguments[index]);
      }

      this.remove();
    }

    return this;
  };

  _proto.next = function next() {
    return this.parent.at(this.parent.index(this) + 1);
  };

  _proto.prev = function prev() {
    return this.parent.at(this.parent.index(this) - 1);
  };

  _proto.clone = function clone(overrides) {
    if (overrides === void 0) {
      overrides = {};
    }

    var cloned = cloneNode(this);

    for (var name in overrides) {
      cloned[name] = overrides[name];
    }

    return cloned;
  }
  /**
   * Some non-standard syntax doesn't follow normal escaping rules for css.
   * This allows non standard syntax to be appended to an existing property
   * by specifying the escaped value. By specifying the escaped value,
   * illegal characters are allowed to be directly inserted into css output.
   * @param {string} name the property to set
   * @param {any} value the unescaped value of the property
   * @param {string} valueEscaped optional. the escaped value of the property.
   */
  ;

  _proto.appendToPropertyAndEscape = function appendToPropertyAndEscape(name, value, valueEscaped) {
    if (!this.raws) {
      this.raws = {};
    }

    var originalValue = this[name];
    var originalEscaped = this.raws[name];
    this[name] = originalValue + value; // this may trigger a setter that updates raws, so it has to be set first.

    if (originalEscaped || valueEscaped !== value) {
      this.raws[name] = (originalEscaped || originalValue) + valueEscaped;
    } else {
      delete this.raws[name]; // delete any escaped value that was created by the setter.
    }
  }
  /**
   * Some non-standard syntax doesn't follow normal escaping rules for css.
   * This allows the escaped value to be specified directly, allowing illegal
   * characters to be directly inserted into css output.
   * @param {string} name the property to set
   * @param {any} value the unescaped value of the property
   * @param {string} valueEscaped the escaped value of the property.
   */
  ;

  _proto.setPropertyAndEscape = function setPropertyAndEscape(name, value, valueEscaped) {
    if (!this.raws) {
      this.raws = {};
    }

    this[name] = value; // this may trigger a setter that updates raws, so it has to be set first.

    this.raws[name] = valueEscaped;
  }
  /**
   * When you want a value to passed through to CSS directly. This method
   * deletes the corresponding raw value causing the stringifier to fallback
   * to the unescaped value.
   * @param {string} name the property to set.
   * @param {any} value The value that is both escaped and unescaped.
   */
  ;

  _proto.setPropertyWithoutEscape = function setPropertyWithoutEscape(name, value) {
    this[name] = value; // this may trigger a setter that updates raws, so it has to be set first.

    if (this.raws) {
      delete this.raws[name];
    }
  }
  /**
   *
   * @param {number} line The number (starting with 1)
   * @param {number} column The column number (starting with 1)
   */
  ;

  _proto.isAtPosition = function isAtPosition(line, column) {
    if (this.source && this.source.start && this.source.end) {
      if (this.source.start.line > line) {
        return false;
      }

      if (this.source.end.line < line) {
        return false;
      }

      if (this.source.start.line === line && this.source.start.column > column) {
        return false;
      }

      if (this.source.end.line === line && this.source.end.column < column) {
        return false;
      }

      return true;
    }

    return undefined;
  };

  _proto.stringifyProperty = function stringifyProperty(name) {
    return this.raws && this.raws[name] || this[name];
  };

  _proto.valueToString = function valueToString() {
    return String(this.stringifyProperty("value"));
  };

  _proto.toString = function toString() {
    return [this.rawSpaceBefore, this.valueToString(), this.rawSpaceAfter].join('');
  };

  _createClass(Node, [{
    key: "rawSpaceBefore",
    get: function get() {
      var rawSpace = this.raws && this.raws.spaces && this.raws.spaces.before;

      if (rawSpace === undefined) {
        rawSpace = this.spaces && this.spaces.before;
      }

      return rawSpace || "";
    },
    set: function set(raw) {
      (0, util$2.ensureObject)(this, "raws", "spaces");
      this.raws.spaces.before = raw;
    }
  }, {
    key: "rawSpaceAfter",
    get: function get() {
      var rawSpace = this.raws && this.raws.spaces && this.raws.spaces.after;

      if (rawSpace === undefined) {
        rawSpace = this.spaces.after;
      }

      return rawSpace || "";
    },
    set: function set(raw) {
      (0, util$2.ensureObject)(this, "raws", "spaces");
      this.raws.spaces.after = raw;
    }
  }]);

  return Node;
}();

exports["default"] = Node;
module.exports = exports.default;
});

var types$1 = createCommonjsModule(function (module, exports) {

exports.__esModule = true;
exports.UNIVERSAL = exports.ATTRIBUTE = exports.CLASS = exports.COMBINATOR = exports.COMMENT = exports.ID = exports.NESTING = exports.PSEUDO = exports.ROOT = exports.SELECTOR = exports.STRING = exports.TAG = void 0;
var TAG = 'tag';
exports.TAG = TAG;
var STRING = 'string';
exports.STRING = STRING;
var SELECTOR = 'selector';
exports.SELECTOR = SELECTOR;
var ROOT = 'root';
exports.ROOT = ROOT;
var PSEUDO = 'pseudo';
exports.PSEUDO = PSEUDO;
var NESTING = 'nesting';
exports.NESTING = NESTING;
var ID = 'id';
exports.ID = ID;
var COMMENT = 'comment';
exports.COMMENT = COMMENT;
var COMBINATOR = 'combinator';
exports.COMBINATOR = COMBINATOR;
var CLASS = 'class';
exports.CLASS = CLASS;
var ATTRIBUTE = 'attribute';
exports.ATTRIBUTE = ATTRIBUTE;
var UNIVERSAL = 'universal';
exports.UNIVERSAL = UNIVERSAL;
});

var container$1 = createCommonjsModule(function (module, exports) {

exports.__esModule = true;
exports["default"] = void 0;

var _node = _interopRequireDefault(node);

var types = _interopRequireWildcard(types$1);

function _getRequireWildcardCache() { if (typeof WeakMap !== "function") return null; var cache = new WeakMap(); _getRequireWildcardCache = function _getRequireWildcardCache() { return cache; }; return cache; }

function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } if (obj === null || typeof obj !== "object" && typeof obj !== "function") { return { "default": obj }; } var cache = _getRequireWildcardCache(); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj["default"] = obj; if (cache) { cache.set(obj, newObj); } return newObj; }

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }

function _createForOfIteratorHelperLoose(o, allowArrayLike) { var it; if (typeof Symbol === "undefined" || o[Symbol.iterator] == null) { if (Array.isArray(o) || (it = _unsupportedIterableToArray(o)) || allowArrayLike && o && typeof o.length === "number") { if (it) o = it; var i = 0; return function () { if (i >= o.length) return { done: true }; return { done: false, value: o[i++] }; }; } throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); } it = o[Symbol.iterator](); return it.next.bind(it); }

function _unsupportedIterableToArray(o, minLen) { if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = Object.prototype.toString.call(o).slice(8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return Array.from(o); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); }

function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0, arr2 = new Array(len); i < len; i++) { arr2[i] = arr[i]; } return arr2; }

function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }

function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }

function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; _setPrototypeOf(subClass, superClass); }

function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }

var Container = /*#__PURE__*/function (_Node) {
  _inheritsLoose(Container, _Node);

  function Container(opts) {
    var _this;

    _this = _Node.call(this, opts) || this;

    if (!_this.nodes) {
      _this.nodes = [];
    }

    return _this;
  }

  var _proto = Container.prototype;

  _proto.append = function append(selector) {
    selector.parent = this;
    this.nodes.push(selector);
    return this;
  };

  _proto.prepend = function prepend(selector) {
    selector.parent = this;
    this.nodes.unshift(selector);
    return this;
  };

  _proto.at = function at(index) {
    return this.nodes[index];
  };

  _proto.index = function index(child) {
    if (typeof child === 'number') {
      return child;
    }

    return this.nodes.indexOf(child);
  };

  _proto.removeChild = function removeChild(child) {
    child = this.index(child);
    this.at(child).parent = undefined;
    this.nodes.splice(child, 1);
    var index;

    for (var id in this.indexes) {
      index = this.indexes[id];

      if (index >= child) {
        this.indexes[id] = index - 1;
      }
    }

    return this;
  };

  _proto.removeAll = function removeAll() {
    for (var _iterator = _createForOfIteratorHelperLoose(this.nodes), _step; !(_step = _iterator()).done;) {
      var node = _step.value;
      node.parent = undefined;
    }

    this.nodes = [];
    return this;
  };

  _proto.empty = function empty() {
    return this.removeAll();
  };

  _proto.insertAfter = function insertAfter(oldNode, newNode) {
    newNode.parent = this;
    var oldIndex = this.index(oldNode);
    this.nodes.splice(oldIndex + 1, 0, newNode);
    newNode.parent = this;
    var index;

    for (var id in this.indexes) {
      index = this.indexes[id];

      if (oldIndex <= index) {
        this.indexes[id] = index + 1;
      }
    }

    return this;
  };

  _proto.insertBefore = function insertBefore(oldNode, newNode) {
    newNode.parent = this;
    var oldIndex = this.index(oldNode);
    this.nodes.splice(oldIndex, 0, newNode);
    newNode.parent = this;
    var index;

    for (var id in this.indexes) {
      index = this.indexes[id];

      if (index <= oldIndex) {
        this.indexes[id] = index + 1;
      }
    }

    return this;
  };

  _proto._findChildAtPosition = function _findChildAtPosition(line, col) {
    var found = undefined;
    this.each(function (node) {
      if (node.atPosition) {
        var foundChild = node.atPosition(line, col);

        if (foundChild) {
          found = foundChild;
          return false;
        }
      } else if (node.isAtPosition(line, col)) {
        found = node;
        return false;
      }
    });
    return found;
  }
  /**
   * Return the most specific node at the line and column number given.
   * The source location is based on the original parsed location, locations aren't
   * updated as selector nodes are mutated.
   * 
   * Note that this location is relative to the location of the first character
   * of the selector, and not the location of the selector in the overall document
   * when used in conjunction with postcss.
   *
   * If not found, returns undefined.
   * @param {number} line The line number of the node to find. (1-based index)
   * @param {number} col  The column number of the node to find. (1-based index)
   */
  ;

  _proto.atPosition = function atPosition(line, col) {
    if (this.isAtPosition(line, col)) {
      return this._findChildAtPosition(line, col) || this;
    } else {
      return undefined;
    }
  };

  _proto._inferEndPosition = function _inferEndPosition() {
    if (this.last && this.last.source && this.last.source.end) {
      this.source = this.source || {};
      this.source.end = this.source.end || {};
      Object.assign(this.source.end, this.last.source.end);
    }
  };

  _proto.each = function each(callback) {
    if (!this.lastEach) {
      this.lastEach = 0;
    }

    if (!this.indexes) {
      this.indexes = {};
    }

    this.lastEach++;
    var id = this.lastEach;
    this.indexes[id] = 0;

    if (!this.length) {
      return undefined;
    }

    var index, result;

    while (this.indexes[id] < this.length) {
      index = this.indexes[id];
      result = callback(this.at(index), index);

      if (result === false) {
        break;
      }

      this.indexes[id] += 1;
    }

    delete this.indexes[id];

    if (result === false) {
      return false;
    }
  };

  _proto.walk = function walk(callback) {
    return this.each(function (node, i) {
      var result = callback(node, i);

      if (result !== false && node.length) {
        result = node.walk(callback);
      }

      if (result === false) {
        return false;
      }
    });
  };

  _proto.walkAttributes = function walkAttributes(callback) {
    var _this2 = this;

    return this.walk(function (selector) {
      if (selector.type === types.ATTRIBUTE) {
        return callback.call(_this2, selector);
      }
    });
  };

  _proto.walkClasses = function walkClasses(callback) {
    var _this3 = this;

    return this.walk(function (selector) {
      if (selector.type === types.CLASS) {
        return callback.call(_this3, selector);
      }
    });
  };

  _proto.walkCombinators = function walkCombinators(callback) {
    var _this4 = this;

    return this.walk(function (selector) {
      if (selector.type === types.COMBINATOR) {
        return callback.call(_this4, selector);
      }
    });
  };

  _proto.walkComments = function walkComments(callback) {
    var _this5 = this;

    return this.walk(function (selector) {
      if (selector.type === types.COMMENT) {
        return callback.call(_this5, selector);
      }
    });
  };

  _proto.walkIds = function walkIds(callback) {
    var _this6 = this;

    return this.walk(function (selector) {
      if (selector.type === types.ID) {
        return callback.call(_this6, selector);
      }
    });
  };

  _proto.walkNesting = function walkNesting(callback) {
    var _this7 = this;

    return this.walk(function (selector) {
      if (selector.type === types.NESTING) {
        return callback.call(_this7, selector);
      }
    });
  };

  _proto.walkPseudos = function walkPseudos(callback) {
    var _this8 = this;

    return this.walk(function (selector) {
      if (selector.type === types.PSEUDO) {
        return callback.call(_this8, selector);
      }
    });
  };

  _proto.walkTags = function walkTags(callback) {
    var _this9 = this;

    return this.walk(function (selector) {
      if (selector.type === types.TAG) {
        return callback.call(_this9, selector);
      }
    });
  };

  _proto.walkUniversals = function walkUniversals(callback) {
    var _this10 = this;

    return this.walk(function (selector) {
      if (selector.type === types.UNIVERSAL) {
        return callback.call(_this10, selector);
      }
    });
  };

  _proto.split = function split(callback) {
    var _this11 = this;

    var current = [];
    return this.reduce(function (memo, node, index) {
      var split = callback.call(_this11, node);
      current.push(node);

      if (split) {
        memo.push(current);
        current = [];
      } else if (index === _this11.length - 1) {
        memo.push(current);
      }

      return memo;
    }, []);
  };

  _proto.map = function map(callback) {
    return this.nodes.map(callback);
  };

  _proto.reduce = function reduce(callback, memo) {
    return this.nodes.reduce(callback, memo);
  };

  _proto.every = function every(callback) {
    return this.nodes.every(callback);
  };

  _proto.some = function some(callback) {
    return this.nodes.some(callback);
  };

  _proto.filter = function filter(callback) {
    return this.nodes.filter(callback);
  };

  _proto.sort = function sort(callback) {
    return this.nodes.sort(callback);
  };

  _proto.toString = function toString() {
    return this.map(String).join('');
  };

  _createClass(Container, [{
    key: "first",
    get: function get() {
      return this.at(0);
    }
  }, {
    key: "last",
    get: function get() {
      return this.at(this.length - 1);
    }
  }, {
    key: "length",
    get: function get() {
      return this.nodes.length;
    }
  }]);

  return Container;
}(_node["default"]);

exports["default"] = Container;
module.exports = exports.default;
});

var root$1 = createCommonjsModule(function (module, exports) {

exports.__esModule = true;
exports["default"] = void 0;

var _container = _interopRequireDefault(container$1);



function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }

function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }

function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }

function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; _setPrototypeOf(subClass, superClass); }

function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }

var Root = /*#__PURE__*/function (_Container) {
  _inheritsLoose(Root, _Container);

  function Root(opts) {
    var _this;

    _this = _Container.call(this, opts) || this;
    _this.type = types$1.ROOT;
    return _this;
  }

  var _proto = Root.prototype;

  _proto.toString = function toString() {
    var str = this.reduce(function (memo, selector) {
      memo.push(String(selector));
      return memo;
    }, []).join(',');
    return this.trailingComma ? str + ',' : str;
  };

  _proto.error = function error(message, options) {
    if (this._error) {
      return this._error(message, options);
    } else {
      return new Error(message);
    }
  };

  _createClass(Root, [{
    key: "errorGenerator",
    set: function set(handler) {
      this._error = handler;
    }
  }]);

  return Root;
}(_container["default"]);

exports["default"] = Root;
module.exports = exports.default;
});

var selector = createCommonjsModule(function (module, exports) {

exports.__esModule = true;
exports["default"] = void 0;

var _container = _interopRequireDefault(container$1);



function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }

function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; _setPrototypeOf(subClass, superClass); }

function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }

var Selector = /*#__PURE__*/function (_Container) {
  _inheritsLoose(Selector, _Container);

  function Selector(opts) {
    var _this;

    _this = _Container.call(this, opts) || this;
    _this.type = types$1.SELECTOR;
    return _this;
  }

  return Selector;
}(_container["default"]);

exports["default"] = Selector;
module.exports = exports.default;
});

/*! https://mths.be/cssesc v3.0.0 by @mathias */

var object = {};
var hasOwnProperty$3 = object.hasOwnProperty;
var merge = function merge(options, defaults) {
	if (!options) {
		return defaults;
	}
	var result = {};
	for (var key in defaults) {
		// `if (defaults.hasOwnProperty(key) { … }` is not needed here, since
		// only recognized option names are used.
		result[key] = hasOwnProperty$3.call(options, key) ? options[key] : defaults[key];
	}
	return result;
};

var regexAnySingleEscape = /[ -,\.\/:-@\[-\^`\{-~]/;
var regexSingleEscape = /[ -,\.\/:-@\[\]\^`\{-~]/;
var regexExcessiveSpaces = /(^|\\+)?(\\[A-F0-9]{1,6})\x20(?![a-fA-F0-9\x20])/g;

// https://mathiasbynens.be/notes/css-escapes#css
var cssesc = function cssesc(string, options) {
	options = merge(options, cssesc.options);
	if (options.quotes != 'single' && options.quotes != 'double') {
		options.quotes = 'single';
	}
	var quote = options.quotes == 'double' ? '"' : '\'';
	var isIdentifier = options.isIdentifier;

	var firstChar = string.charAt(0);
	var output = '';
	var counter = 0;
	var length = string.length;
	while (counter < length) {
		var character = string.charAt(counter++);
		var codePoint = character.charCodeAt();
		var value = void 0;
		// If it’s not a printable ASCII character…
		if (codePoint < 0x20 || codePoint > 0x7E) {
			if (codePoint >= 0xD800 && codePoint <= 0xDBFF && counter < length) {
				// It’s a high surrogate, and there is a next character.
				var extra = string.charCodeAt(counter++);
				if ((extra & 0xFC00) == 0xDC00) {
					// next character is low surrogate
					codePoint = ((codePoint & 0x3FF) << 10) + (extra & 0x3FF) + 0x10000;
				} else {
					// It’s an unmatched surrogate; only append this code unit, in case
					// the next code unit is the high surrogate of a surrogate pair.
					counter--;
				}
			}
			value = '\\' + codePoint.toString(16).toUpperCase() + ' ';
		} else {
			if (options.escapeEverything) {
				if (regexAnySingleEscape.test(character)) {
					value = '\\' + character;
				} else {
					value = '\\' + codePoint.toString(16).toUpperCase() + ' ';
				}
			} else if (/[\t\n\f\r\x0B]/.test(character)) {
				value = '\\' + codePoint.toString(16).toUpperCase() + ' ';
			} else if (character == '\\' || !isIdentifier && (character == '"' && quote == character || character == '\'' && quote == character) || isIdentifier && regexSingleEscape.test(character)) {
				value = '\\' + character;
			} else {
				value = character;
			}
		}
		output += value;
	}

	if (isIdentifier) {
		if (/^-[-\d]/.test(output)) {
			output = '\\-' + output.slice(1);
		} else if (/\d/.test(firstChar)) {
			output = '\\3' + firstChar + ' ' + output.slice(1);
		}
	}

	// Remove spaces after `\HEX` escapes that are not followed by a hex digit,
	// since they’re redundant. Note that this is only possible if the escape
	// sequence isn’t preceded by an odd number of backslashes.
	output = output.replace(regexExcessiveSpaces, function ($0, $1, $2) {
		if ($1 && $1.length % 2) {
			// It’s not safe to remove the space, so don’t.
			return $0;
		}
		// Strip the space.
		return ($1 || '') + $2;
	});

	if (!isIdentifier && options.wrap) {
		return quote + output + quote;
	}
	return output;
};

// Expose default options (so they can be overridden globally).
cssesc.options = {
	'escapeEverything': false,
	'isIdentifier': false,
	'quotes': 'single',
	'wrap': false
};

cssesc.version = '3.0.0';

var cssesc_1 = cssesc;

var className = createCommonjsModule(function (module, exports) {

exports.__esModule = true;
exports["default"] = void 0;

var _cssesc = _interopRequireDefault(cssesc_1);



var _node = _interopRequireDefault(node);



function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }

function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }

function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }

function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; _setPrototypeOf(subClass, superClass); }

function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }

var ClassName = /*#__PURE__*/function (_Node) {
  _inheritsLoose(ClassName, _Node);

  function ClassName(opts) {
    var _this;

    _this = _Node.call(this, opts) || this;
    _this.type = types$1.CLASS;
    _this._constructed = true;
    return _this;
  }

  var _proto = ClassName.prototype;

  _proto.valueToString = function valueToString() {
    return '.' + _Node.prototype.valueToString.call(this);
  };

  _createClass(ClassName, [{
    key: "value",
    get: function get() {
      return this._value;
    },
    set: function set(v) {
      if (this._constructed) {
        var escaped = (0, _cssesc["default"])(v, {
          isIdentifier: true
        });

        if (escaped !== v) {
          (0, util$2.ensureObject)(this, "raws");
          this.raws.value = escaped;
        } else if (this.raws) {
          delete this.raws.value;
        }
      }

      this._value = v;
    }
  }]);

  return ClassName;
}(_node["default"]);

exports["default"] = ClassName;
module.exports = exports.default;
});

var comment$1 = createCommonjsModule(function (module, exports) {

exports.__esModule = true;
exports["default"] = void 0;

var _node = _interopRequireDefault(node);



function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }

function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; _setPrototypeOf(subClass, superClass); }

function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }

var Comment = /*#__PURE__*/function (_Node) {
  _inheritsLoose(Comment, _Node);

  function Comment(opts) {
    var _this;

    _this = _Node.call(this, opts) || this;
    _this.type = types$1.COMMENT;
    return _this;
  }

  return Comment;
}(_node["default"]);

exports["default"] = Comment;
module.exports = exports.default;
});

var id = createCommonjsModule(function (module, exports) {

exports.__esModule = true;
exports["default"] = void 0;

var _node = _interopRequireDefault(node);



function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }

function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; _setPrototypeOf(subClass, superClass); }

function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }

var ID = /*#__PURE__*/function (_Node) {
  _inheritsLoose(ID, _Node);

  function ID(opts) {
    var _this;

    _this = _Node.call(this, opts) || this;
    _this.type = types$1.ID;
    return _this;
  }

  var _proto = ID.prototype;

  _proto.valueToString = function valueToString() {
    return '#' + _Node.prototype.valueToString.call(this);
  };

  return ID;
}(_node["default"]);

exports["default"] = ID;
module.exports = exports.default;
});

var namespace = createCommonjsModule(function (module, exports) {

exports.__esModule = true;
exports["default"] = void 0;

var _cssesc = _interopRequireDefault(cssesc_1);



var _node = _interopRequireDefault(node);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }

function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }

function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }

function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; _setPrototypeOf(subClass, superClass); }

function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }

var Namespace = /*#__PURE__*/function (_Node) {
  _inheritsLoose(Namespace, _Node);

  function Namespace() {
    return _Node.apply(this, arguments) || this;
  }

  var _proto = Namespace.prototype;

  _proto.qualifiedName = function qualifiedName(value) {
    if (this.namespace) {
      return this.namespaceString + "|" + value;
    } else {
      return value;
    }
  };

  _proto.valueToString = function valueToString() {
    return this.qualifiedName(_Node.prototype.valueToString.call(this));
  };

  _createClass(Namespace, [{
    key: "namespace",
    get: function get() {
      return this._namespace;
    },
    set: function set(namespace) {
      if (namespace === true || namespace === "*" || namespace === "&") {
        this._namespace = namespace;

        if (this.raws) {
          delete this.raws.namespace;
        }

        return;
      }

      var escaped = (0, _cssesc["default"])(namespace, {
        isIdentifier: true
      });
      this._namespace = namespace;

      if (escaped !== namespace) {
        (0, util$2.ensureObject)(this, "raws");
        this.raws.namespace = escaped;
      } else if (this.raws) {
        delete this.raws.namespace;
      }
    }
  }, {
    key: "ns",
    get: function get() {
      return this._namespace;
    },
    set: function set(namespace) {
      this.namespace = namespace;
    }
  }, {
    key: "namespaceString",
    get: function get() {
      if (this.namespace) {
        var ns = this.stringifyProperty("namespace");

        if (ns === true) {
          return '';
        } else {
          return ns;
        }
      } else {
        return '';
      }
    }
  }]);

  return Namespace;
}(_node["default"]);

exports["default"] = Namespace;
module.exports = exports.default;
});

var tag = createCommonjsModule(function (module, exports) {

exports.__esModule = true;
exports["default"] = void 0;

var _namespace = _interopRequireDefault(namespace);



function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }

function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; _setPrototypeOf(subClass, superClass); }

function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }

var Tag = /*#__PURE__*/function (_Namespace) {
  _inheritsLoose(Tag, _Namespace);

  function Tag(opts) {
    var _this;

    _this = _Namespace.call(this, opts) || this;
    _this.type = types$1.TAG;
    return _this;
  }

  return Tag;
}(_namespace["default"]);

exports["default"] = Tag;
module.exports = exports.default;
});

var string = createCommonjsModule(function (module, exports) {

exports.__esModule = true;
exports["default"] = void 0;

var _node = _interopRequireDefault(node);



function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }

function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; _setPrototypeOf(subClass, superClass); }

function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }

var String = /*#__PURE__*/function (_Node) {
  _inheritsLoose(String, _Node);

  function String(opts) {
    var _this;

    _this = _Node.call(this, opts) || this;
    _this.type = types$1.STRING;
    return _this;
  }

  return String;
}(_node["default"]);

exports["default"] = String;
module.exports = exports.default;
});

var pseudo = createCommonjsModule(function (module, exports) {

exports.__esModule = true;
exports["default"] = void 0;

var _container = _interopRequireDefault(container$1);



function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }

function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; _setPrototypeOf(subClass, superClass); }

function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }

var Pseudo = /*#__PURE__*/function (_Container) {
  _inheritsLoose(Pseudo, _Container);

  function Pseudo(opts) {
    var _this;

    _this = _Container.call(this, opts) || this;
    _this.type = types$1.PSEUDO;
    return _this;
  }

  var _proto = Pseudo.prototype;

  _proto.toString = function toString() {
    var params = this.length ? '(' + this.map(String).join(',') + ')' : '';
    return [this.rawSpaceBefore, this.stringifyProperty("value"), params, this.rawSpaceAfter].join('');
  };

  return Pseudo;
}(_container["default"]);

exports["default"] = Pseudo;
module.exports = exports.default;
});

/**
 * For Node.js, simply re-export the core `util.deprecate` function.
 */

var node$1 = require$$0.deprecate;

var attribute = createCommonjsModule(function (module, exports) {

exports.__esModule = true;
exports.unescapeValue = unescapeValue;
exports["default"] = void 0;

var _cssesc = _interopRequireDefault(cssesc_1);

var _unesc = _interopRequireDefault(unesc_1);

var _namespace = _interopRequireDefault(namespace);



var _CSSESC_QUOTE_OPTIONS;

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }

function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }

function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }

function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; _setPrototypeOf(subClass, superClass); }

function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }



var WRAPPED_IN_QUOTES = /^('|")([^]*)\1$/;
var warnOfDeprecatedValueAssignment = node$1(function () {}, "Assigning an attribute a value containing characters that might need to be escaped is deprecated. " + "Call attribute.setValue() instead.");
var warnOfDeprecatedQuotedAssignment = node$1(function () {}, "Assigning attr.quoted is deprecated and has no effect. Assign to attr.quoteMark instead.");
var warnOfDeprecatedConstructor = node$1(function () {}, "Constructing an Attribute selector with a value without specifying quoteMark is deprecated. Note: The value should be unescaped now.");

function unescapeValue(value) {
  var deprecatedUsage = false;
  var quoteMark = null;
  var unescaped = value;
  var m = unescaped.match(WRAPPED_IN_QUOTES);

  if (m) {
    quoteMark = m[1];
    unescaped = m[2];
  }

  unescaped = (0, _unesc["default"])(unescaped);

  if (unescaped !== value) {
    deprecatedUsage = true;
  }

  return {
    deprecatedUsage: deprecatedUsage,
    unescaped: unescaped,
    quoteMark: quoteMark
  };
}

function handleDeprecatedContructorOpts(opts) {
  if (opts.quoteMark !== undefined) {
    return opts;
  }

  if (opts.value === undefined) {
    return opts;
  }

  warnOfDeprecatedConstructor();

  var _unescapeValue = unescapeValue(opts.value),
      quoteMark = _unescapeValue.quoteMark,
      unescaped = _unescapeValue.unescaped;

  if (!opts.raws) {
    opts.raws = {};
  }

  if (opts.raws.value === undefined) {
    opts.raws.value = opts.value;
  }

  opts.value = unescaped;
  opts.quoteMark = quoteMark;
  return opts;
}

var Attribute = /*#__PURE__*/function (_Namespace) {
  _inheritsLoose(Attribute, _Namespace);

  function Attribute(opts) {
    var _this;

    if (opts === void 0) {
      opts = {};
    }

    _this = _Namespace.call(this, handleDeprecatedContructorOpts(opts)) || this;
    _this.type = types$1.ATTRIBUTE;
    _this.raws = _this.raws || {};
    Object.defineProperty(_this.raws, 'unquoted', {
      get: node$1(function () {
        return _this.value;
      }, "attr.raws.unquoted is deprecated. Call attr.value instead."),
      set: node$1(function () {
        return _this.value;
      }, "Setting attr.raws.unquoted is deprecated and has no effect. attr.value is unescaped by default now.")
    });
    _this._constructed = true;
    return _this;
  }
  /**
   * Returns the Attribute's value quoted such that it would be legal to use
   * in the value of a css file. The original value's quotation setting
   * used for stringification is left unchanged. See `setValue(value, options)`
   * if you want to control the quote settings of a new value for the attribute.
   *
   * You can also change the quotation used for the current value by setting quoteMark.
   *
   * Options:
   *   * quoteMark {'"' | "'" | null} - Use this value to quote the value. If this
   *     option is not set, the original value for quoteMark will be used. If
   *     indeterminate, a double quote is used. The legal values are:
   *     * `null` - the value will be unquoted and characters will be escaped as necessary.
   *     * `'` - the value will be quoted with a single quote and single quotes are escaped.
   *     * `"` - the value will be quoted with a double quote and double quotes are escaped.
   *   * preferCurrentQuoteMark {boolean} - if true, prefer the source quote mark
   *     over the quoteMark option value.
   *   * smart {boolean} - if true, will select a quote mark based on the value
   *     and the other options specified here. See the `smartQuoteMark()`
   *     method.
   **/


  var _proto = Attribute.prototype;

  _proto.getQuotedValue = function getQuotedValue(options) {
    if (options === void 0) {
      options = {};
    }

    var quoteMark = this._determineQuoteMark(options);

    var cssescopts = CSSESC_QUOTE_OPTIONS[quoteMark];
    var escaped = (0, _cssesc["default"])(this._value, cssescopts);
    return escaped;
  };

  _proto._determineQuoteMark = function _determineQuoteMark(options) {
    return options.smart ? this.smartQuoteMark(options) : this.preferredQuoteMark(options);
  }
  /**
   * Set the unescaped value with the specified quotation options. The value
   * provided must not include any wrapping quote marks -- those quotes will
   * be interpreted as part of the value and escaped accordingly.
   */
  ;

  _proto.setValue = function setValue(value, options) {
    if (options === void 0) {
      options = {};
    }

    this._value = value;
    this._quoteMark = this._determineQuoteMark(options);

    this._syncRawValue();
  }
  /**
   * Intelligently select a quoteMark value based on the value's contents. If
   * the value is a legal CSS ident, it will not be quoted. Otherwise a quote
   * mark will be picked that minimizes the number of escapes.
   *
   * If there's no clear winner, the quote mark from these options is used,
   * then the source quote mark (this is inverted if `preferCurrentQuoteMark` is
   * true). If the quoteMark is unspecified, a double quote is used.
   *
   * @param options This takes the quoteMark and preferCurrentQuoteMark options
   * from the quoteValue method.
   */
  ;

  _proto.smartQuoteMark = function smartQuoteMark(options) {
    var v = this.value;
    var numSingleQuotes = v.replace(/[^']/g, '').length;
    var numDoubleQuotes = v.replace(/[^"]/g, '').length;

    if (numSingleQuotes + numDoubleQuotes === 0) {
      var escaped = (0, _cssesc["default"])(v, {
        isIdentifier: true
      });

      if (escaped === v) {
        return Attribute.NO_QUOTE;
      } else {
        var pref = this.preferredQuoteMark(options);

        if (pref === Attribute.NO_QUOTE) {
          // pick a quote mark that isn't none and see if it's smaller
          var quote = this.quoteMark || options.quoteMark || Attribute.DOUBLE_QUOTE;
          var opts = CSSESC_QUOTE_OPTIONS[quote];
          var quoteValue = (0, _cssesc["default"])(v, opts);

          if (quoteValue.length < escaped.length) {
            return quote;
          }
        }

        return pref;
      }
    } else if (numDoubleQuotes === numSingleQuotes) {
      return this.preferredQuoteMark(options);
    } else if (numDoubleQuotes < numSingleQuotes) {
      return Attribute.DOUBLE_QUOTE;
    } else {
      return Attribute.SINGLE_QUOTE;
    }
  }
  /**
   * Selects the preferred quote mark based on the options and the current quote mark value.
   * If you want the quote mark to depend on the attribute value, call `smartQuoteMark(opts)`
   * instead.
   */
  ;

  _proto.preferredQuoteMark = function preferredQuoteMark(options) {
    var quoteMark = options.preferCurrentQuoteMark ? this.quoteMark : options.quoteMark;

    if (quoteMark === undefined) {
      quoteMark = options.preferCurrentQuoteMark ? options.quoteMark : this.quoteMark;
    }

    if (quoteMark === undefined) {
      quoteMark = Attribute.DOUBLE_QUOTE;
    }

    return quoteMark;
  };

  _proto._syncRawValue = function _syncRawValue() {
    var rawValue = (0, _cssesc["default"])(this._value, CSSESC_QUOTE_OPTIONS[this.quoteMark]);

    if (rawValue === this._value) {
      if (this.raws) {
        delete this.raws.value;
      }
    } else {
      this.raws.value = rawValue;
    }
  };

  _proto._handleEscapes = function _handleEscapes(prop, value) {
    if (this._constructed) {
      var escaped = (0, _cssesc["default"])(value, {
        isIdentifier: true
      });

      if (escaped !== value) {
        this.raws[prop] = escaped;
      } else {
        delete this.raws[prop];
      }
    }
  };

  _proto._spacesFor = function _spacesFor(name) {
    var attrSpaces = {
      before: '',
      after: ''
    };
    var spaces = this.spaces[name] || {};
    var rawSpaces = this.raws.spaces && this.raws.spaces[name] || {};
    return Object.assign(attrSpaces, spaces, rawSpaces);
  };

  _proto._stringFor = function _stringFor(name, spaceName, concat) {
    if (spaceName === void 0) {
      spaceName = name;
    }

    if (concat === void 0) {
      concat = defaultAttrConcat;
    }

    var attrSpaces = this._spacesFor(spaceName);

    return concat(this.stringifyProperty(name), attrSpaces);
  }
  /**
   * returns the offset of the attribute part specified relative to the
   * start of the node of the output string.
   *
   * * "ns" - alias for "namespace"
   * * "namespace" - the namespace if it exists.
   * * "attribute" - the attribute name
   * * "attributeNS" - the start of the attribute or its namespace
   * * "operator" - the match operator of the attribute
   * * "value" - The value (string or identifier)
   * * "insensitive" - the case insensitivity flag;
   * @param part One of the possible values inside an attribute.
   * @returns -1 if the name is invalid or the value doesn't exist in this attribute.
   */
  ;

  _proto.offsetOf = function offsetOf(name) {
    var count = 1;

    var attributeSpaces = this._spacesFor("attribute");

    count += attributeSpaces.before.length;

    if (name === "namespace" || name === "ns") {
      return this.namespace ? count : -1;
    }

    if (name === "attributeNS") {
      return count;
    }

    count += this.namespaceString.length;

    if (this.namespace) {
      count += 1;
    }

    if (name === "attribute") {
      return count;
    }

    count += this.stringifyProperty("attribute").length;
    count += attributeSpaces.after.length;

    var operatorSpaces = this._spacesFor("operator");

    count += operatorSpaces.before.length;
    var operator = this.stringifyProperty("operator");

    if (name === "operator") {
      return operator ? count : -1;
    }

    count += operator.length;
    count += operatorSpaces.after.length;

    var valueSpaces = this._spacesFor("value");

    count += valueSpaces.before.length;
    var value = this.stringifyProperty("value");

    if (name === "value") {
      return value ? count : -1;
    }

    count += value.length;
    count += valueSpaces.after.length;

    var insensitiveSpaces = this._spacesFor("insensitive");

    count += insensitiveSpaces.before.length;

    if (name === "insensitive") {
      return this.insensitive ? count : -1;
    }

    return -1;
  };

  _proto.toString = function toString() {
    var _this2 = this;

    var selector = [this.rawSpaceBefore, '['];
    selector.push(this._stringFor('qualifiedAttribute', 'attribute'));

    if (this.operator && (this.value || this.value === '')) {
      selector.push(this._stringFor('operator'));
      selector.push(this._stringFor('value'));
      selector.push(this._stringFor('insensitiveFlag', 'insensitive', function (attrValue, attrSpaces) {
        if (attrValue.length > 0 && !_this2.quoted && attrSpaces.before.length === 0 && !(_this2.spaces.value && _this2.spaces.value.after)) {
          attrSpaces.before = " ";
        }

        return defaultAttrConcat(attrValue, attrSpaces);
      }));
    }

    selector.push(']');
    selector.push(this.rawSpaceAfter);
    return selector.join('');
  };

  _createClass(Attribute, [{
    key: "quoted",
    get: function get() {
      var qm = this.quoteMark;
      return qm === "'" || qm === '"';
    },
    set: function set(value) {
      warnOfDeprecatedQuotedAssignment();
    }
    /**
     * returns a single (`'`) or double (`"`) quote character if the value is quoted.
     * returns `null` if the value is not quoted.
     * returns `undefined` if the quotation state is unknown (this can happen when
     * the attribute is constructed without specifying a quote mark.)
     */

  }, {
    key: "quoteMark",
    get: function get() {
      return this._quoteMark;
    }
    /**
     * Set the quote mark to be used by this attribute's value.
     * If the quote mark changes, the raw (escaped) value at `attr.raws.value` of the attribute
     * value is updated accordingly.
     *
     * @param {"'" | '"' | null} quoteMark The quote mark or `null` if the value should be unquoted.
     */
    ,
    set: function set(quoteMark) {
      if (!this._constructed) {
        this._quoteMark = quoteMark;
        return;
      }

      if (this._quoteMark !== quoteMark) {
        this._quoteMark = quoteMark;

        this._syncRawValue();
      }
    }
  }, {
    key: "qualifiedAttribute",
    get: function get() {
      return this.qualifiedName(this.raws.attribute || this.attribute);
    }
  }, {
    key: "insensitiveFlag",
    get: function get() {
      return this.insensitive ? 'i' : '';
    }
  }, {
    key: "value",
    get: function get() {
      return this._value;
    }
    /**
     * Before 3.0, the value had to be set to an escaped value including any wrapped
     * quote marks. In 3.0, the semantics of `Attribute.value` changed so that the value
     * is unescaped during parsing and any quote marks are removed.
     *
     * Because the ambiguity of this semantic change, if you set `attr.value = newValue`,
     * a deprecation warning is raised when the new value contains any characters that would
     * require escaping (including if it contains wrapped quotes).
     *
     * Instead, you should call `attr.setValue(newValue, opts)` and pass options that describe
     * how the new value is quoted.
     */
    ,
    set: function set(v) {
      if (this._constructed) {
        var _unescapeValue2 = unescapeValue(v),
            deprecatedUsage = _unescapeValue2.deprecatedUsage,
            unescaped = _unescapeValue2.unescaped,
            quoteMark = _unescapeValue2.quoteMark;

        if (deprecatedUsage) {
          warnOfDeprecatedValueAssignment();
        }

        if (unescaped === this._value && quoteMark === this._quoteMark) {
          return;
        }

        this._value = unescaped;
        this._quoteMark = quoteMark;

        this._syncRawValue();
      } else {
        this._value = v;
      }
    }
  }, {
    key: "attribute",
    get: function get() {
      return this._attribute;
    },
    set: function set(name) {
      this._handleEscapes("attribute", name);

      this._attribute = name;
    }
  }]);

  return Attribute;
}(_namespace["default"]);

exports["default"] = Attribute;
Attribute.NO_QUOTE = null;
Attribute.SINGLE_QUOTE = "'";
Attribute.DOUBLE_QUOTE = '"';
var CSSESC_QUOTE_OPTIONS = (_CSSESC_QUOTE_OPTIONS = {
  "'": {
    quotes: 'single',
    wrap: true
  },
  '"': {
    quotes: 'double',
    wrap: true
  }
}, _CSSESC_QUOTE_OPTIONS[null] = {
  isIdentifier: true
}, _CSSESC_QUOTE_OPTIONS);

function defaultAttrConcat(attrValue, attrSpaces) {
  return "" + attrSpaces.before + attrValue + attrSpaces.after;
}
});

var universal = createCommonjsModule(function (module, exports) {

exports.__esModule = true;
exports["default"] = void 0;

var _namespace = _interopRequireDefault(namespace);



function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }

function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; _setPrototypeOf(subClass, superClass); }

function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }

var Universal = /*#__PURE__*/function (_Namespace) {
  _inheritsLoose(Universal, _Namespace);

  function Universal(opts) {
    var _this;

    _this = _Namespace.call(this, opts) || this;
    _this.type = types$1.UNIVERSAL;
    _this.value = '*';
    return _this;
  }

  return Universal;
}(_namespace["default"]);

exports["default"] = Universal;
module.exports = exports.default;
});

var combinator = createCommonjsModule(function (module, exports) {

exports.__esModule = true;
exports["default"] = void 0;

var _node = _interopRequireDefault(node);



function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }

function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; _setPrototypeOf(subClass, superClass); }

function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }

var Combinator = /*#__PURE__*/function (_Node) {
  _inheritsLoose(Combinator, _Node);

  function Combinator(opts) {
    var _this;

    _this = _Node.call(this, opts) || this;
    _this.type = types$1.COMBINATOR;
    return _this;
  }

  return Combinator;
}(_node["default"]);

exports["default"] = Combinator;
module.exports = exports.default;
});

var nesting = createCommonjsModule(function (module, exports) {

exports.__esModule = true;
exports["default"] = void 0;

var _node = _interopRequireDefault(node);



function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }

function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; _setPrototypeOf(subClass, superClass); }

function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }

var Nesting = /*#__PURE__*/function (_Node) {
  _inheritsLoose(Nesting, _Node);

  function Nesting(opts) {
    var _this;

    _this = _Node.call(this, opts) || this;
    _this.type = types$1.NESTING;
    _this.value = '&';
    return _this;
  }

  return Nesting;
}(_node["default"]);

exports["default"] = Nesting;
module.exports = exports.default;
});

var sortAscending_1 = createCommonjsModule(function (module, exports) {

exports.__esModule = true;
exports["default"] = sortAscending;

function sortAscending(list) {
  return list.sort(function (a, b) {
    return a - b;
  });
}
module.exports = exports.default;
});

var tokenTypes$1 = createCommonjsModule(function (module, exports) {

exports.__esModule = true;
exports.combinator = exports.word = exports.comment = exports.str = exports.tab = exports.newline = exports.feed = exports.cr = exports.backslash = exports.bang = exports.slash = exports.doubleQuote = exports.singleQuote = exports.space = exports.greaterThan = exports.pipe = exports.equals = exports.plus = exports.caret = exports.tilde = exports.dollar = exports.closeSquare = exports.openSquare = exports.closeParenthesis = exports.openParenthesis = exports.semicolon = exports.colon = exports.comma = exports.at = exports.asterisk = exports.ampersand = void 0;
var ampersand = 38; // `&`.charCodeAt(0);

exports.ampersand = ampersand;
var asterisk = 42; // `*`.charCodeAt(0);

exports.asterisk = asterisk;
var at = 64; // `@`.charCodeAt(0);

exports.at = at;
var comma = 44; // `,`.charCodeAt(0);

exports.comma = comma;
var colon = 58; // `:`.charCodeAt(0);

exports.colon = colon;
var semicolon = 59; // `;`.charCodeAt(0);

exports.semicolon = semicolon;
var openParenthesis = 40; // `(`.charCodeAt(0);

exports.openParenthesis = openParenthesis;
var closeParenthesis = 41; // `)`.charCodeAt(0);

exports.closeParenthesis = closeParenthesis;
var openSquare = 91; // `[`.charCodeAt(0);

exports.openSquare = openSquare;
var closeSquare = 93; // `]`.charCodeAt(0);

exports.closeSquare = closeSquare;
var dollar = 36; // `$`.charCodeAt(0);

exports.dollar = dollar;
var tilde = 126; // `~`.charCodeAt(0);

exports.tilde = tilde;
var caret = 94; // `^`.charCodeAt(0);

exports.caret = caret;
var plus = 43; // `+`.charCodeAt(0);

exports.plus = plus;
var equals = 61; // `=`.charCodeAt(0);

exports.equals = equals;
var pipe = 124; // `|`.charCodeAt(0);

exports.pipe = pipe;
var greaterThan = 62; // `>`.charCodeAt(0);

exports.greaterThan = greaterThan;
var space = 32; // ` `.charCodeAt(0);

exports.space = space;
var singleQuote = 39; // `'`.charCodeAt(0);

exports.singleQuote = singleQuote;
var doubleQuote = 34; // `"`.charCodeAt(0);

exports.doubleQuote = doubleQuote;
var slash = 47; // `/`.charCodeAt(0);

exports.slash = slash;
var bang = 33; // `!`.charCodeAt(0);

exports.bang = bang;
var backslash = 92; // '\\'.charCodeAt(0);

exports.backslash = backslash;
var cr = 13; // '\r'.charCodeAt(0);

exports.cr = cr;
var feed = 12; // '\f'.charCodeAt(0);

exports.feed = feed;
var newline = 10; // '\n'.charCodeAt(0);

exports.newline = newline;
var tab = 9; // '\t'.charCodeAt(0);
// Expose aliases primarily for readability.

exports.tab = tab;
var str = singleQuote; // No good single character representation!

exports.str = str;
var comment = -1;
exports.comment = comment;
var word = -2;
exports.word = word;
var combinator = -3;
exports.combinator = combinator;
});

var tokenize_1 = createCommonjsModule(function (module, exports) {

exports.__esModule = true;
exports["default"] = tokenize;
exports.FIELDS = void 0;

var t = _interopRequireWildcard(tokenTypes$1);

var _unescapable, _wordDelimiters;

function _getRequireWildcardCache() { if (typeof WeakMap !== "function") return null; var cache = new WeakMap(); _getRequireWildcardCache = function _getRequireWildcardCache() { return cache; }; return cache; }

function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } if (obj === null || typeof obj !== "object" && typeof obj !== "function") { return { "default": obj }; } var cache = _getRequireWildcardCache(); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj["default"] = obj; if (cache) { cache.set(obj, newObj); } return newObj; }

var unescapable = (_unescapable = {}, _unescapable[t.tab] = true, _unescapable[t.newline] = true, _unescapable[t.cr] = true, _unescapable[t.feed] = true, _unescapable);
var wordDelimiters = (_wordDelimiters = {}, _wordDelimiters[t.space] = true, _wordDelimiters[t.tab] = true, _wordDelimiters[t.newline] = true, _wordDelimiters[t.cr] = true, _wordDelimiters[t.feed] = true, _wordDelimiters[t.ampersand] = true, _wordDelimiters[t.asterisk] = true, _wordDelimiters[t.bang] = true, _wordDelimiters[t.comma] = true, _wordDelimiters[t.colon] = true, _wordDelimiters[t.semicolon] = true, _wordDelimiters[t.openParenthesis] = true, _wordDelimiters[t.closeParenthesis] = true, _wordDelimiters[t.openSquare] = true, _wordDelimiters[t.closeSquare] = true, _wordDelimiters[t.singleQuote] = true, _wordDelimiters[t.doubleQuote] = true, _wordDelimiters[t.plus] = true, _wordDelimiters[t.pipe] = true, _wordDelimiters[t.tilde] = true, _wordDelimiters[t.greaterThan] = true, _wordDelimiters[t.equals] = true, _wordDelimiters[t.dollar] = true, _wordDelimiters[t.caret] = true, _wordDelimiters[t.slash] = true, _wordDelimiters);
var hex = {};
var hexChars = "0123456789abcdefABCDEF";

for (var i = 0; i < hexChars.length; i++) {
  hex[hexChars.charCodeAt(i)] = true;
}
/**
 *  Returns the last index of the bar css word
 * @param {string} css The string in which the word begins
 * @param {number} start The index into the string where word's first letter occurs
 */


function consumeWord(css, start) {
  var next = start;
  var code;

  do {
    code = css.charCodeAt(next);

    if (wordDelimiters[code]) {
      return next - 1;
    } else if (code === t.backslash) {
      next = consumeEscape(css, next) + 1;
    } else {
      // All other characters are part of the word
      next++;
    }
  } while (next < css.length);

  return next - 1;
}
/**
 *  Returns the last index of the escape sequence
 * @param {string} css The string in which the sequence begins
 * @param {number} start The index into the string where escape character (`\`) occurs.
 */


function consumeEscape(css, start) {
  var next = start;
  var code = css.charCodeAt(next + 1);

  if (unescapable[code]) ; else if (hex[code]) {
    var hexDigits = 0; // consume up to 6 hex chars

    do {
      next++;
      hexDigits++;
      code = css.charCodeAt(next + 1);
    } while (hex[code] && hexDigits < 6); // if fewer than 6 hex chars, a trailing space ends the escape


    if (hexDigits < 6 && code === t.space) {
      next++;
    }
  } else {
    // the next char is part of the current word
    next++;
  }

  return next;
}

var FIELDS = {
  TYPE: 0,
  START_LINE: 1,
  START_COL: 2,
  END_LINE: 3,
  END_COL: 4,
  START_POS: 5,
  END_POS: 6
};
exports.FIELDS = FIELDS;

function tokenize(input) {
  var tokens = [];
  var css = input.css.valueOf();
  var _css = css,
      length = _css.length;
  var offset = -1;
  var line = 1;
  var start = 0;
  var end = 0;
  var code, content, endColumn, endLine, escaped, escapePos, last, lines, next, nextLine, nextOffset, quote, tokenType;

  function unclosed(what, fix) {
    if (input.safe) {
      // fyi: this is never set to true.
      css += fix;
      next = css.length - 1;
    } else {
      throw input.error('Unclosed ' + what, line, start - offset, start);
    }
  }

  while (start < length) {
    code = css.charCodeAt(start);

    if (code === t.newline) {
      offset = start;
      line += 1;
    }

    switch (code) {
      case t.space:
      case t.tab:
      case t.newline:
      case t.cr:
      case t.feed:
        next = start;

        do {
          next += 1;
          code = css.charCodeAt(next);

          if (code === t.newline) {
            offset = next;
            line += 1;
          }
        } while (code === t.space || code === t.newline || code === t.tab || code === t.cr || code === t.feed);

        tokenType = t.space;
        endLine = line;
        endColumn = next - offset - 1;
        end = next;
        break;

      case t.plus:
      case t.greaterThan:
      case t.tilde:
      case t.pipe:
        next = start;

        do {
          next += 1;
          code = css.charCodeAt(next);
        } while (code === t.plus || code === t.greaterThan || code === t.tilde || code === t.pipe);

        tokenType = t.combinator;
        endLine = line;
        endColumn = start - offset;
        end = next;
        break;
      // Consume these characters as single tokens.

      case t.asterisk:
      case t.ampersand:
      case t.bang:
      case t.comma:
      case t.equals:
      case t.dollar:
      case t.caret:
      case t.openSquare:
      case t.closeSquare:
      case t.colon:
      case t.semicolon:
      case t.openParenthesis:
      case t.closeParenthesis:
        next = start;
        tokenType = code;
        endLine = line;
        endColumn = start - offset;
        end = next + 1;
        break;

      case t.singleQuote:
      case t.doubleQuote:
        quote = code === t.singleQuote ? "'" : '"';
        next = start;

        do {
          escaped = false;
          next = css.indexOf(quote, next + 1);

          if (next === -1) {
            unclosed('quote', quote);
          }

          escapePos = next;

          while (css.charCodeAt(escapePos - 1) === t.backslash) {
            escapePos -= 1;
            escaped = !escaped;
          }
        } while (escaped);

        tokenType = t.str;
        endLine = line;
        endColumn = start - offset;
        end = next + 1;
        break;

      default:
        if (code === t.slash && css.charCodeAt(start + 1) === t.asterisk) {
          next = css.indexOf('*/', start + 2) + 1;

          if (next === 0) {
            unclosed('comment', '*/');
          }

          content = css.slice(start, next + 1);
          lines = content.split('\n');
          last = lines.length - 1;

          if (last > 0) {
            nextLine = line + last;
            nextOffset = next - lines[last].length;
          } else {
            nextLine = line;
            nextOffset = offset;
          }

          tokenType = t.comment;
          line = nextLine;
          endLine = nextLine;
          endColumn = next - nextOffset;
        } else if (code === t.slash) {
          next = start;
          tokenType = code;
          endLine = line;
          endColumn = start - offset;
          end = next + 1;
        } else {
          next = consumeWord(css, start);
          tokenType = t.word;
          endLine = line;
          endColumn = next - offset;
        }

        end = next + 1;
        break;
    } // Ensure that the token structure remains consistent


    tokens.push([tokenType, // [0] Token type
    line, // [1] Starting line
    start - offset, // [2] Starting column
    endLine, // [3] Ending line
    endColumn, // [4] Ending column
    start, // [5] Start position / Source index
    end // [6] End position
    ]); // Reset offset for the next token

    if (nextOffset) {
      offset = nextOffset;
      nextOffset = null;
    }

    start = end;
  }

  return tokens;
}
});

var parser$1 = createCommonjsModule(function (module, exports) {

exports.__esModule = true;
exports["default"] = void 0;

var _root = _interopRequireDefault(root$1);

var _selector = _interopRequireDefault(selector);

var _className = _interopRequireDefault(className);

var _comment = _interopRequireDefault(comment$1);

var _id = _interopRequireDefault(id);

var _tag = _interopRequireDefault(tag);

var _string = _interopRequireDefault(string);

var _pseudo = _interopRequireDefault(pseudo);

var _attribute = _interopRequireWildcard(attribute);

var _universal = _interopRequireDefault(universal);

var _combinator = _interopRequireDefault(combinator);

var _nesting = _interopRequireDefault(nesting);

var _sortAscending = _interopRequireDefault(sortAscending_1);

var _tokenize = _interopRequireWildcard(tokenize_1);

var tokens = _interopRequireWildcard(tokenTypes$1);

var types = _interopRequireWildcard(types$1);



var _WHITESPACE_TOKENS, _Object$assign;

function _getRequireWildcardCache() { if (typeof WeakMap !== "function") return null; var cache = new WeakMap(); _getRequireWildcardCache = function _getRequireWildcardCache() { return cache; }; return cache; }

function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } if (obj === null || typeof obj !== "object" && typeof obj !== "function") { return { "default": obj }; } var cache = _getRequireWildcardCache(); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj["default"] = obj; if (cache) { cache.set(obj, newObj); } return newObj; }

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }

function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }

function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }

var WHITESPACE_TOKENS = (_WHITESPACE_TOKENS = {}, _WHITESPACE_TOKENS[tokens.space] = true, _WHITESPACE_TOKENS[tokens.cr] = true, _WHITESPACE_TOKENS[tokens.feed] = true, _WHITESPACE_TOKENS[tokens.newline] = true, _WHITESPACE_TOKENS[tokens.tab] = true, _WHITESPACE_TOKENS);
var WHITESPACE_EQUIV_TOKENS = Object.assign({}, WHITESPACE_TOKENS, (_Object$assign = {}, _Object$assign[tokens.comment] = true, _Object$assign));

function tokenStart(token) {
  return {
    line: token[_tokenize.FIELDS.START_LINE],
    column: token[_tokenize.FIELDS.START_COL]
  };
}

function tokenEnd(token) {
  return {
    line: token[_tokenize.FIELDS.END_LINE],
    column: token[_tokenize.FIELDS.END_COL]
  };
}

function getSource(startLine, startColumn, endLine, endColumn) {
  return {
    start: {
      line: startLine,
      column: startColumn
    },
    end: {
      line: endLine,
      column: endColumn
    }
  };
}

function getTokenSource(token) {
  return getSource(token[_tokenize.FIELDS.START_LINE], token[_tokenize.FIELDS.START_COL], token[_tokenize.FIELDS.END_LINE], token[_tokenize.FIELDS.END_COL]);
}

function getTokenSourceSpan(startToken, endToken) {
  if (!startToken) {
    return undefined;
  }

  return getSource(startToken[_tokenize.FIELDS.START_LINE], startToken[_tokenize.FIELDS.START_COL], endToken[_tokenize.FIELDS.END_LINE], endToken[_tokenize.FIELDS.END_COL]);
}

function unescapeProp(node, prop) {
  var value = node[prop];

  if (typeof value !== "string") {
    return;
  }

  if (value.indexOf("\\") !== -1) {
    (0, util$2.ensureObject)(node, 'raws');
    node[prop] = (0, util$2.unesc)(value);

    if (node.raws[prop] === undefined) {
      node.raws[prop] = value;
    }
  }

  return node;
}

function indexesOf(array, item) {
  var i = -1;
  var indexes = [];

  while ((i = array.indexOf(item, i + 1)) !== -1) {
    indexes.push(i);
  }

  return indexes;
}

function uniqs() {
  var list = Array.prototype.concat.apply([], arguments);
  return list.filter(function (item, i) {
    return i === list.indexOf(item);
  });
}

var Parser = /*#__PURE__*/function () {
  function Parser(rule, options) {
    if (options === void 0) {
      options = {};
    }

    this.rule = rule;
    this.options = Object.assign({
      lossy: false,
      safe: false
    }, options);
    this.position = 0;
    this.css = typeof this.rule === 'string' ? this.rule : this.rule.selector;
    this.tokens = (0, _tokenize["default"])({
      css: this.css,
      error: this._errorGenerator(),
      safe: this.options.safe
    });
    var rootSource = getTokenSourceSpan(this.tokens[0], this.tokens[this.tokens.length - 1]);
    this.root = new _root["default"]({
      source: rootSource
    });
    this.root.errorGenerator = this._errorGenerator();
    var selector = new _selector["default"]({
      source: {
        start: {
          line: 1,
          column: 1
        }
      }
    });
    this.root.append(selector);
    this.current = selector;
    this.loop();
  }

  var _proto = Parser.prototype;

  _proto._errorGenerator = function _errorGenerator() {
    var _this = this;

    return function (message, errorOptions) {
      if (typeof _this.rule === 'string') {
        return new Error(message);
      }

      return _this.rule.error(message, errorOptions);
    };
  };

  _proto.attribute = function attribute() {
    var attr = [];
    var startingToken = this.currToken;
    this.position++;

    while (this.position < this.tokens.length && this.currToken[_tokenize.FIELDS.TYPE] !== tokens.closeSquare) {
      attr.push(this.currToken);
      this.position++;
    }

    if (this.currToken[_tokenize.FIELDS.TYPE] !== tokens.closeSquare) {
      return this.expected('closing square bracket', this.currToken[_tokenize.FIELDS.START_POS]);
    }

    var len = attr.length;
    var node = {
      source: getSource(startingToken[1], startingToken[2], this.currToken[3], this.currToken[4]),
      sourceIndex: startingToken[_tokenize.FIELDS.START_POS]
    };

    if (len === 1 && !~[tokens.word].indexOf(attr[0][_tokenize.FIELDS.TYPE])) {
      return this.expected('attribute', attr[0][_tokenize.FIELDS.START_POS]);
    }

    var pos = 0;
    var spaceBefore = '';
    var commentBefore = '';
    var lastAdded = null;
    var spaceAfterMeaningfulToken = false;

    while (pos < len) {
      var token = attr[pos];
      var content = this.content(token);
      var next = attr[pos + 1];

      switch (token[_tokenize.FIELDS.TYPE]) {
        case tokens.space:
          // if (
          //     len === 1 ||
          //     pos === 0 && this.content(next) === '|'
          // ) {
          //     return this.expected('attribute', token[TOKEN.START_POS], content);
          // }
          spaceAfterMeaningfulToken = true;

          if (this.options.lossy) {
            break;
          }

          if (lastAdded) {
            (0, util$2.ensureObject)(node, 'spaces', lastAdded);
            var prevContent = node.spaces[lastAdded].after || '';
            node.spaces[lastAdded].after = prevContent + content;
            var existingComment = (0, util$2.getProp)(node, 'raws', 'spaces', lastAdded, 'after') || null;

            if (existingComment) {
              node.raws.spaces[lastAdded].after = existingComment + content;
            }
          } else {
            spaceBefore = spaceBefore + content;
            commentBefore = commentBefore + content;
          }

          break;

        case tokens.asterisk:
          if (next[_tokenize.FIELDS.TYPE] === tokens.equals) {
            node.operator = content;
            lastAdded = 'operator';
          } else if ((!node.namespace || lastAdded === "namespace" && !spaceAfterMeaningfulToken) && next) {
            if (spaceBefore) {
              (0, util$2.ensureObject)(node, 'spaces', 'attribute');
              node.spaces.attribute.before = spaceBefore;
              spaceBefore = '';
            }

            if (commentBefore) {
              (0, util$2.ensureObject)(node, 'raws', 'spaces', 'attribute');
              node.raws.spaces.attribute.before = spaceBefore;
              commentBefore = '';
            }

            node.namespace = (node.namespace || "") + content;
            var rawValue = (0, util$2.getProp)(node, 'raws', 'namespace') || null;

            if (rawValue) {
              node.raws.namespace += content;
            }

            lastAdded = 'namespace';
          }

          spaceAfterMeaningfulToken = false;
          break;

        case tokens.dollar:
          if (lastAdded === "value") {
            var oldRawValue = (0, util$2.getProp)(node, 'raws', 'value');
            node.value += "$";

            if (oldRawValue) {
              node.raws.value = oldRawValue + "$";
            }

            break;
          }

        // Falls through

        case tokens.caret:
          if (next[_tokenize.FIELDS.TYPE] === tokens.equals) {
            node.operator = content;
            lastAdded = 'operator';
          }

          spaceAfterMeaningfulToken = false;
          break;

        case tokens.combinator:
          if (content === '~' && next[_tokenize.FIELDS.TYPE] === tokens.equals) {
            node.operator = content;
            lastAdded = 'operator';
          }

          if (content !== '|') {
            spaceAfterMeaningfulToken = false;
            break;
          }

          if (next[_tokenize.FIELDS.TYPE] === tokens.equals) {
            node.operator = content;
            lastAdded = 'operator';
          } else if (!node.namespace && !node.attribute) {
            node.namespace = true;
          }

          spaceAfterMeaningfulToken = false;
          break;

        case tokens.word:
          if (next && this.content(next) === '|' && attr[pos + 2] && attr[pos + 2][_tokenize.FIELDS.TYPE] !== tokens.equals && // this look-ahead probably fails with comment nodes involved.
          !node.operator && !node.namespace) {
            node.namespace = content;
            lastAdded = 'namespace';
          } else if (!node.attribute || lastAdded === "attribute" && !spaceAfterMeaningfulToken) {
            if (spaceBefore) {
              (0, util$2.ensureObject)(node, 'spaces', 'attribute');
              node.spaces.attribute.before = spaceBefore;
              spaceBefore = '';
            }

            if (commentBefore) {
              (0, util$2.ensureObject)(node, 'raws', 'spaces', 'attribute');
              node.raws.spaces.attribute.before = commentBefore;
              commentBefore = '';
            }

            node.attribute = (node.attribute || "") + content;

            var _rawValue = (0, util$2.getProp)(node, 'raws', 'attribute') || null;

            if (_rawValue) {
              node.raws.attribute += content;
            }

            lastAdded = 'attribute';
          } else if (!node.value && node.value !== "" || lastAdded === "value" && !spaceAfterMeaningfulToken) {
            var _unescaped = (0, util$2.unesc)(content);

            var _oldRawValue = (0, util$2.getProp)(node, 'raws', 'value') || '';

            var oldValue = node.value || '';
            node.value = oldValue + _unescaped;
            node.quoteMark = null;

            if (_unescaped !== content || _oldRawValue) {
              (0, util$2.ensureObject)(node, 'raws');
              node.raws.value = (_oldRawValue || oldValue) + content;
            }

            lastAdded = 'value';
          } else {
            var insensitive = content === 'i' || content === "I";

            if ((node.value || node.value === '') && (node.quoteMark || spaceAfterMeaningfulToken)) {
              node.insensitive = insensitive;

              if (!insensitive || content === "I") {
                (0, util$2.ensureObject)(node, 'raws');
                node.raws.insensitiveFlag = content;
              }

              lastAdded = 'insensitive';

              if (spaceBefore) {
                (0, util$2.ensureObject)(node, 'spaces', 'insensitive');
                node.spaces.insensitive.before = spaceBefore;
                spaceBefore = '';
              }

              if (commentBefore) {
                (0, util$2.ensureObject)(node, 'raws', 'spaces', 'insensitive');
                node.raws.spaces.insensitive.before = commentBefore;
                commentBefore = '';
              }
            } else if (node.value || node.value === '') {
              lastAdded = 'value';
              node.value += content;

              if (node.raws.value) {
                node.raws.value += content;
              }
            }
          }

          spaceAfterMeaningfulToken = false;
          break;

        case tokens.str:
          if (!node.attribute || !node.operator) {
            return this.error("Expected an attribute followed by an operator preceding the string.", {
              index: token[_tokenize.FIELDS.START_POS]
            });
          }

          var _unescapeValue = (0, _attribute.unescapeValue)(content),
              unescaped = _unescapeValue.unescaped,
              quoteMark = _unescapeValue.quoteMark;

          node.value = unescaped;
          node.quoteMark = quoteMark;
          lastAdded = 'value';
          (0, util$2.ensureObject)(node, 'raws');
          node.raws.value = content;
          spaceAfterMeaningfulToken = false;
          break;

        case tokens.equals:
          if (!node.attribute) {
            return this.expected('attribute', token[_tokenize.FIELDS.START_POS], content);
          }

          if (node.value) {
            return this.error('Unexpected "=" found; an operator was already defined.', {
              index: token[_tokenize.FIELDS.START_POS]
            });
          }

          node.operator = node.operator ? node.operator + content : content;
          lastAdded = 'operator';
          spaceAfterMeaningfulToken = false;
          break;

        case tokens.comment:
          if (lastAdded) {
            if (spaceAfterMeaningfulToken || next && next[_tokenize.FIELDS.TYPE] === tokens.space || lastAdded === 'insensitive') {
              var lastComment = (0, util$2.getProp)(node, 'spaces', lastAdded, 'after') || '';
              var rawLastComment = (0, util$2.getProp)(node, 'raws', 'spaces', lastAdded, 'after') || lastComment;
              (0, util$2.ensureObject)(node, 'raws', 'spaces', lastAdded);
              node.raws.spaces[lastAdded].after = rawLastComment + content;
            } else {
              var lastValue = node[lastAdded] || '';
              var rawLastValue = (0, util$2.getProp)(node, 'raws', lastAdded) || lastValue;
              (0, util$2.ensureObject)(node, 'raws');
              node.raws[lastAdded] = rawLastValue + content;
            }
          } else {
            commentBefore = commentBefore + content;
          }

          break;

        default:
          return this.error("Unexpected \"" + content + "\" found.", {
            index: token[_tokenize.FIELDS.START_POS]
          });
      }

      pos++;
    }

    unescapeProp(node, "attribute");
    unescapeProp(node, "namespace");
    this.newNode(new _attribute["default"](node));
    this.position++;
  }
  /**
   * return a node containing meaningless garbage up to (but not including) the specified token position.
   * if the token position is negative, all remaining tokens are consumed.
   *
   * This returns an array containing a single string node if all whitespace,
   * otherwise an array of comment nodes with space before and after.
   *
   * These tokens are not added to the current selector, the caller can add them or use them to amend
   * a previous node's space metadata.
   *
   * In lossy mode, this returns only comments.
   */
  ;

  _proto.parseWhitespaceEquivalentTokens = function parseWhitespaceEquivalentTokens(stopPosition) {
    if (stopPosition < 0) {
      stopPosition = this.tokens.length;
    }

    var startPosition = this.position;
    var nodes = [];
    var space = "";
    var lastComment = undefined;

    do {
      if (WHITESPACE_TOKENS[this.currToken[_tokenize.FIELDS.TYPE]]) {
        if (!this.options.lossy) {
          space += this.content();
        }
      } else if (this.currToken[_tokenize.FIELDS.TYPE] === tokens.comment) {
        var spaces = {};

        if (space) {
          spaces.before = space;
          space = "";
        }

        lastComment = new _comment["default"]({
          value: this.content(),
          source: getTokenSource(this.currToken),
          sourceIndex: this.currToken[_tokenize.FIELDS.START_POS],
          spaces: spaces
        });
        nodes.push(lastComment);
      }
    } while (++this.position < stopPosition);

    if (space) {
      if (lastComment) {
        lastComment.spaces.after = space;
      } else if (!this.options.lossy) {
        var firstToken = this.tokens[startPosition];
        var lastToken = this.tokens[this.position - 1];
        nodes.push(new _string["default"]({
          value: '',
          source: getSource(firstToken[_tokenize.FIELDS.START_LINE], firstToken[_tokenize.FIELDS.START_COL], lastToken[_tokenize.FIELDS.END_LINE], lastToken[_tokenize.FIELDS.END_COL]),
          sourceIndex: firstToken[_tokenize.FIELDS.START_POS],
          spaces: {
            before: space,
            after: ''
          }
        }));
      }
    }

    return nodes;
  }
  /**
   * 
   * @param {*} nodes 
   */
  ;

  _proto.convertWhitespaceNodesToSpace = function convertWhitespaceNodesToSpace(nodes, requiredSpace) {
    var _this2 = this;

    if (requiredSpace === void 0) {
      requiredSpace = false;
    }

    var space = "";
    var rawSpace = "";
    nodes.forEach(function (n) {
      var spaceBefore = _this2.lossySpace(n.spaces.before, requiredSpace);

      var rawSpaceBefore = _this2.lossySpace(n.rawSpaceBefore, requiredSpace);

      space += spaceBefore + _this2.lossySpace(n.spaces.after, requiredSpace && spaceBefore.length === 0);
      rawSpace += spaceBefore + n.value + _this2.lossySpace(n.rawSpaceAfter, requiredSpace && rawSpaceBefore.length === 0);
    });

    if (rawSpace === space) {
      rawSpace = undefined;
    }

    var result = {
      space: space,
      rawSpace: rawSpace
    };
    return result;
  };

  _proto.isNamedCombinator = function isNamedCombinator(position) {
    if (position === void 0) {
      position = this.position;
    }

    return this.tokens[position + 0] && this.tokens[position + 0][_tokenize.FIELDS.TYPE] === tokens.slash && this.tokens[position + 1] && this.tokens[position + 1][_tokenize.FIELDS.TYPE] === tokens.word && this.tokens[position + 2] && this.tokens[position + 2][_tokenize.FIELDS.TYPE] === tokens.slash;
  };

  _proto.namedCombinator = function namedCombinator() {
    if (this.isNamedCombinator()) {
      var nameRaw = this.content(this.tokens[this.position + 1]);
      var name = (0, util$2.unesc)(nameRaw).toLowerCase();
      var raws = {};

      if (name !== nameRaw) {
        raws.value = "/" + nameRaw + "/";
      }

      var node = new _combinator["default"]({
        value: "/" + name + "/",
        source: getSource(this.currToken[_tokenize.FIELDS.START_LINE], this.currToken[_tokenize.FIELDS.START_COL], this.tokens[this.position + 2][_tokenize.FIELDS.END_LINE], this.tokens[this.position + 2][_tokenize.FIELDS.END_COL]),
        sourceIndex: this.currToken[_tokenize.FIELDS.START_POS],
        raws: raws
      });
      this.position = this.position + 3;
      return node;
    } else {
      this.unexpected();
    }
  };

  _proto.combinator = function combinator() {
    var _this3 = this;

    if (this.content() === '|') {
      return this.namespace();
    } // We need to decide between a space that's a descendant combinator and meaningless whitespace at the end of a selector.


    var nextSigTokenPos = this.locateNextMeaningfulToken(this.position);

    if (nextSigTokenPos < 0 || this.tokens[nextSigTokenPos][_tokenize.FIELDS.TYPE] === tokens.comma) {
      var nodes = this.parseWhitespaceEquivalentTokens(nextSigTokenPos);

      if (nodes.length > 0) {
        var last = this.current.last;

        if (last) {
          var _this$convertWhitespa = this.convertWhitespaceNodesToSpace(nodes),
              space = _this$convertWhitespa.space,
              rawSpace = _this$convertWhitespa.rawSpace;

          if (rawSpace !== undefined) {
            last.rawSpaceAfter += rawSpace;
          }

          last.spaces.after += space;
        } else {
          nodes.forEach(function (n) {
            return _this3.newNode(n);
          });
        }
      }

      return;
    }

    var firstToken = this.currToken;
    var spaceOrDescendantSelectorNodes = undefined;

    if (nextSigTokenPos > this.position) {
      spaceOrDescendantSelectorNodes = this.parseWhitespaceEquivalentTokens(nextSigTokenPos);
    }

    var node;

    if (this.isNamedCombinator()) {
      node = this.namedCombinator();
    } else if (this.currToken[_tokenize.FIELDS.TYPE] === tokens.combinator) {
      node = new _combinator["default"]({
        value: this.content(),
        source: getTokenSource(this.currToken),
        sourceIndex: this.currToken[_tokenize.FIELDS.START_POS]
      });
      this.position++;
    } else if (WHITESPACE_TOKENS[this.currToken[_tokenize.FIELDS.TYPE]]) ; else if (!spaceOrDescendantSelectorNodes) {
      this.unexpected();
    }

    if (node) {
      if (spaceOrDescendantSelectorNodes) {
        var _this$convertWhitespa2 = this.convertWhitespaceNodesToSpace(spaceOrDescendantSelectorNodes),
            _space = _this$convertWhitespa2.space,
            _rawSpace = _this$convertWhitespa2.rawSpace;

        node.spaces.before = _space;
        node.rawSpaceBefore = _rawSpace;
      }
    } else {
      // descendant combinator
      var _this$convertWhitespa3 = this.convertWhitespaceNodesToSpace(spaceOrDescendantSelectorNodes, true),
          _space2 = _this$convertWhitespa3.space,
          _rawSpace2 = _this$convertWhitespa3.rawSpace;

      if (!_rawSpace2) {
        _rawSpace2 = _space2;
      }

      var spaces = {};
      var raws = {
        spaces: {}
      };

      if (_space2.endsWith(' ') && _rawSpace2.endsWith(' ')) {
        spaces.before = _space2.slice(0, _space2.length - 1);
        raws.spaces.before = _rawSpace2.slice(0, _rawSpace2.length - 1);
      } else if (_space2.startsWith(' ') && _rawSpace2.startsWith(' ')) {
        spaces.after = _space2.slice(1);
        raws.spaces.after = _rawSpace2.slice(1);
      } else {
        raws.value = _rawSpace2;
      }

      node = new _combinator["default"]({
        value: ' ',
        source: getTokenSourceSpan(firstToken, this.tokens[this.position - 1]),
        sourceIndex: firstToken[_tokenize.FIELDS.START_POS],
        spaces: spaces,
        raws: raws
      });
    }

    if (this.currToken && this.currToken[_tokenize.FIELDS.TYPE] === tokens.space) {
      node.spaces.after = this.optionalSpace(this.content());
      this.position++;
    }

    return this.newNode(node);
  };

  _proto.comma = function comma() {
    if (this.position === this.tokens.length - 1) {
      this.root.trailingComma = true;
      this.position++;
      return;
    }

    this.current._inferEndPosition();

    var selector = new _selector["default"]({
      source: {
        start: tokenStart(this.tokens[this.position + 1])
      }
    });
    this.current.parent.append(selector);
    this.current = selector;
    this.position++;
  };

  _proto.comment = function comment() {
    var current = this.currToken;
    this.newNode(new _comment["default"]({
      value: this.content(),
      source: getTokenSource(current),
      sourceIndex: current[_tokenize.FIELDS.START_POS]
    }));
    this.position++;
  };

  _proto.error = function error(message, opts) {
    throw this.root.error(message, opts);
  };

  _proto.missingBackslash = function missingBackslash() {
    return this.error('Expected a backslash preceding the semicolon.', {
      index: this.currToken[_tokenize.FIELDS.START_POS]
    });
  };

  _proto.missingParenthesis = function missingParenthesis() {
    return this.expected('opening parenthesis', this.currToken[_tokenize.FIELDS.START_POS]);
  };

  _proto.missingSquareBracket = function missingSquareBracket() {
    return this.expected('opening square bracket', this.currToken[_tokenize.FIELDS.START_POS]);
  };

  _proto.unexpected = function unexpected() {
    return this.error("Unexpected '" + this.content() + "'. Escaping special characters with \\ may help.", this.currToken[_tokenize.FIELDS.START_POS]);
  };

  _proto.namespace = function namespace() {
    var before = this.prevToken && this.content(this.prevToken) || true;

    if (this.nextToken[_tokenize.FIELDS.TYPE] === tokens.word) {
      this.position++;
      return this.word(before);
    } else if (this.nextToken[_tokenize.FIELDS.TYPE] === tokens.asterisk) {
      this.position++;
      return this.universal(before);
    }
  };

  _proto.nesting = function nesting() {
    if (this.nextToken) {
      var nextContent = this.content(this.nextToken);

      if (nextContent === "|") {
        this.position++;
        return;
      }
    }

    var current = this.currToken;
    this.newNode(new _nesting["default"]({
      value: this.content(),
      source: getTokenSource(current),
      sourceIndex: current[_tokenize.FIELDS.START_POS]
    }));
    this.position++;
  };

  _proto.parentheses = function parentheses() {
    var last = this.current.last;
    var unbalanced = 1;
    this.position++;

    if (last && last.type === types.PSEUDO) {
      var selector = new _selector["default"]({
        source: {
          start: tokenStart(this.tokens[this.position - 1])
        }
      });
      var cache = this.current;
      last.append(selector);
      this.current = selector;

      while (this.position < this.tokens.length && unbalanced) {
        if (this.currToken[_tokenize.FIELDS.TYPE] === tokens.openParenthesis) {
          unbalanced++;
        }

        if (this.currToken[_tokenize.FIELDS.TYPE] === tokens.closeParenthesis) {
          unbalanced--;
        }

        if (unbalanced) {
          this.parse();
        } else {
          this.current.source.end = tokenEnd(this.currToken);
          this.current.parent.source.end = tokenEnd(this.currToken);
          this.position++;
        }
      }

      this.current = cache;
    } else {
      // I think this case should be an error. It's used to implement a basic parse of media queries
      // but I don't think it's a good idea.
      var parenStart = this.currToken;
      var parenValue = "(";
      var parenEnd;

      while (this.position < this.tokens.length && unbalanced) {
        if (this.currToken[_tokenize.FIELDS.TYPE] === tokens.openParenthesis) {
          unbalanced++;
        }

        if (this.currToken[_tokenize.FIELDS.TYPE] === tokens.closeParenthesis) {
          unbalanced--;
        }

        parenEnd = this.currToken;
        parenValue += this.parseParenthesisToken(this.currToken);
        this.position++;
      }

      if (last) {
        last.appendToPropertyAndEscape("value", parenValue, parenValue);
      } else {
        this.newNode(new _string["default"]({
          value: parenValue,
          source: getSource(parenStart[_tokenize.FIELDS.START_LINE], parenStart[_tokenize.FIELDS.START_COL], parenEnd[_tokenize.FIELDS.END_LINE], parenEnd[_tokenize.FIELDS.END_COL]),
          sourceIndex: parenStart[_tokenize.FIELDS.START_POS]
        }));
      }
    }

    if (unbalanced) {
      return this.expected('closing parenthesis', this.currToken[_tokenize.FIELDS.START_POS]);
    }
  };

  _proto.pseudo = function pseudo() {
    var _this4 = this;

    var pseudoStr = '';
    var startingToken = this.currToken;

    while (this.currToken && this.currToken[_tokenize.FIELDS.TYPE] === tokens.colon) {
      pseudoStr += this.content();
      this.position++;
    }

    if (!this.currToken) {
      return this.expected(['pseudo-class', 'pseudo-element'], this.position - 1);
    }

    if (this.currToken[_tokenize.FIELDS.TYPE] === tokens.word) {
      this.splitWord(false, function (first, length) {
        pseudoStr += first;

        _this4.newNode(new _pseudo["default"]({
          value: pseudoStr,
          source: getTokenSourceSpan(startingToken, _this4.currToken),
          sourceIndex: startingToken[_tokenize.FIELDS.START_POS]
        }));

        if (length > 1 && _this4.nextToken && _this4.nextToken[_tokenize.FIELDS.TYPE] === tokens.openParenthesis) {
          _this4.error('Misplaced parenthesis.', {
            index: _this4.nextToken[_tokenize.FIELDS.START_POS]
          });
        }
      });
    } else {
      return this.expected(['pseudo-class', 'pseudo-element'], this.currToken[_tokenize.FIELDS.START_POS]);
    }
  };

  _proto.space = function space() {
    var content = this.content(); // Handle space before and after the selector

    if (this.position === 0 || this.prevToken[_tokenize.FIELDS.TYPE] === tokens.comma || this.prevToken[_tokenize.FIELDS.TYPE] === tokens.openParenthesis || this.current.nodes.every(function (node) {
      return node.type === 'comment';
    })) {
      this.spaces = this.optionalSpace(content);
      this.position++;
    } else if (this.position === this.tokens.length - 1 || this.nextToken[_tokenize.FIELDS.TYPE] === tokens.comma || this.nextToken[_tokenize.FIELDS.TYPE] === tokens.closeParenthesis) {
      this.current.last.spaces.after = this.optionalSpace(content);
      this.position++;
    } else {
      this.combinator();
    }
  };

  _proto.string = function string() {
    var current = this.currToken;
    this.newNode(new _string["default"]({
      value: this.content(),
      source: getTokenSource(current),
      sourceIndex: current[_tokenize.FIELDS.START_POS]
    }));
    this.position++;
  };

  _proto.universal = function universal(namespace) {
    var nextToken = this.nextToken;

    if (nextToken && this.content(nextToken) === '|') {
      this.position++;
      return this.namespace();
    }

    var current = this.currToken;
    this.newNode(new _universal["default"]({
      value: this.content(),
      source: getTokenSource(current),
      sourceIndex: current[_tokenize.FIELDS.START_POS]
    }), namespace);
    this.position++;
  };

  _proto.splitWord = function splitWord(namespace, firstCallback) {
    var _this5 = this;

    var nextToken = this.nextToken;
    var word = this.content();

    while (nextToken && ~[tokens.dollar, tokens.caret, tokens.equals, tokens.word].indexOf(nextToken[_tokenize.FIELDS.TYPE])) {
      this.position++;
      var current = this.content();
      word += current;

      if (current.lastIndexOf('\\') === current.length - 1) {
        var next = this.nextToken;

        if (next && next[_tokenize.FIELDS.TYPE] === tokens.space) {
          word += this.requiredSpace(this.content(next));
          this.position++;
        }
      }

      nextToken = this.nextToken;
    }

    var hasClass = indexesOf(word, '.').filter(function (i) {
      // Allow escaped dot within class name
      var escapedDot = word[i - 1] === '\\'; // Allow decimal numbers percent in @keyframes

      var isKeyframesPercent = /^\d+\.\d+%$/.test(word);
      return !escapedDot && !isKeyframesPercent;
    });
    var hasId = indexesOf(word, '#').filter(function (i) {
      return word[i - 1] !== '\\';
    }); // Eliminate Sass interpolations from the list of id indexes

    var interpolations = indexesOf(word, '#{');

    if (interpolations.length) {
      hasId = hasId.filter(function (hashIndex) {
        return !~interpolations.indexOf(hashIndex);
      });
    }

    var indices = (0, _sortAscending["default"])(uniqs([0].concat(hasClass, hasId)));
    indices.forEach(function (ind, i) {
      var index = indices[i + 1] || word.length;
      var value = word.slice(ind, index);

      if (i === 0 && firstCallback) {
        return firstCallback.call(_this5, value, indices.length);
      }

      var node;
      var current = _this5.currToken;
      var sourceIndex = current[_tokenize.FIELDS.START_POS] + indices[i];
      var source = getSource(current[1], current[2] + ind, current[3], current[2] + (index - 1));

      if (~hasClass.indexOf(ind)) {
        var classNameOpts = {
          value: value.slice(1),
          source: source,
          sourceIndex: sourceIndex
        };
        node = new _className["default"](unescapeProp(classNameOpts, "value"));
      } else if (~hasId.indexOf(ind)) {
        var idOpts = {
          value: value.slice(1),
          source: source,
          sourceIndex: sourceIndex
        };
        node = new _id["default"](unescapeProp(idOpts, "value"));
      } else {
        var tagOpts = {
          value: value,
          source: source,
          sourceIndex: sourceIndex
        };
        unescapeProp(tagOpts, "value");
        node = new _tag["default"](tagOpts);
      }

      _this5.newNode(node, namespace); // Ensure that the namespace is used only once


      namespace = null;
    });
    this.position++;
  };

  _proto.word = function word(namespace) {
    var nextToken = this.nextToken;

    if (nextToken && this.content(nextToken) === '|') {
      this.position++;
      return this.namespace();
    }

    return this.splitWord(namespace);
  };

  _proto.loop = function loop() {
    while (this.position < this.tokens.length) {
      this.parse(true);
    }

    this.current._inferEndPosition();

    return this.root;
  };

  _proto.parse = function parse(throwOnParenthesis) {
    switch (this.currToken[_tokenize.FIELDS.TYPE]) {
      case tokens.space:
        this.space();
        break;

      case tokens.comment:
        this.comment();
        break;

      case tokens.openParenthesis:
        this.parentheses();
        break;

      case tokens.closeParenthesis:
        if (throwOnParenthesis) {
          this.missingParenthesis();
        }

        break;

      case tokens.openSquare:
        this.attribute();
        break;

      case tokens.dollar:
      case tokens.caret:
      case tokens.equals:
      case tokens.word:
        this.word();
        break;

      case tokens.colon:
        this.pseudo();
        break;

      case tokens.comma:
        this.comma();
        break;

      case tokens.asterisk:
        this.universal();
        break;

      case tokens.ampersand:
        this.nesting();
        break;

      case tokens.slash:
      case tokens.combinator:
        this.combinator();
        break;

      case tokens.str:
        this.string();
        break;
      // These cases throw; no break needed.

      case tokens.closeSquare:
        this.missingSquareBracket();

      case tokens.semicolon:
        this.missingBackslash();

      default:
        this.unexpected();
    }
  }
  /**
   * Helpers
   */
  ;

  _proto.expected = function expected(description, index, found) {
    if (Array.isArray(description)) {
      var last = description.pop();
      description = description.join(', ') + " or " + last;
    }

    var an = /^[aeiou]/.test(description[0]) ? 'an' : 'a';

    if (!found) {
      return this.error("Expected " + an + " " + description + ".", {
        index: index
      });
    }

    return this.error("Expected " + an + " " + description + ", found \"" + found + "\" instead.", {
      index: index
    });
  };

  _proto.requiredSpace = function requiredSpace(space) {
    return this.options.lossy ? ' ' : space;
  };

  _proto.optionalSpace = function optionalSpace(space) {
    return this.options.lossy ? '' : space;
  };

  _proto.lossySpace = function lossySpace(space, required) {
    if (this.options.lossy) {
      return required ? ' ' : '';
    } else {
      return space;
    }
  };

  _proto.parseParenthesisToken = function parseParenthesisToken(token) {
    var content = this.content(token);

    if (token[_tokenize.FIELDS.TYPE] === tokens.space) {
      return this.requiredSpace(content);
    } else {
      return content;
    }
  };

  _proto.newNode = function newNode(node, namespace) {
    if (namespace) {
      if (/^ +$/.test(namespace)) {
        if (!this.options.lossy) {
          this.spaces = (this.spaces || '') + namespace;
        }

        namespace = true;
      }

      node.namespace = namespace;
      unescapeProp(node, "namespace");
    }

    if (this.spaces) {
      node.spaces.before = this.spaces;
      this.spaces = '';
    }

    return this.current.append(node);
  };

  _proto.content = function content(token) {
    if (token === void 0) {
      token = this.currToken;
    }

    return this.css.slice(token[_tokenize.FIELDS.START_POS], token[_tokenize.FIELDS.END_POS]);
  };

  /**
   * returns the index of the next non-whitespace, non-comment token.
   * returns -1 if no meaningful token is found.
   */
  _proto.locateNextMeaningfulToken = function locateNextMeaningfulToken(startPosition) {
    if (startPosition === void 0) {
      startPosition = this.position + 1;
    }

    var searchPosition = startPosition;

    while (searchPosition < this.tokens.length) {
      if (WHITESPACE_EQUIV_TOKENS[this.tokens[searchPosition][_tokenize.FIELDS.TYPE]]) {
        searchPosition++;
        continue;
      } else {
        return searchPosition;
      }
    }

    return -1;
  };

  _createClass(Parser, [{
    key: "currToken",
    get: function get() {
      return this.tokens[this.position];
    }
  }, {
    key: "nextToken",
    get: function get() {
      return this.tokens[this.position + 1];
    }
  }, {
    key: "prevToken",
    get: function get() {
      return this.tokens[this.position - 1];
    }
  }]);

  return Parser;
}();

exports["default"] = Parser;
module.exports = exports.default;
});

var processor$1 = createCommonjsModule(function (module, exports) {

exports.__esModule = true;
exports["default"] = void 0;

var _parser = _interopRequireDefault(parser$1);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }

var Processor = /*#__PURE__*/function () {
  function Processor(func, options) {
    this.func = func || function noop() {};

    this.funcRes = null;
    this.options = options;
  }

  var _proto = Processor.prototype;

  _proto._shouldUpdateSelector = function _shouldUpdateSelector(rule, options) {
    if (options === void 0) {
      options = {};
    }

    var merged = Object.assign({}, this.options, options);

    if (merged.updateSelector === false) {
      return false;
    } else {
      return typeof rule !== "string";
    }
  };

  _proto._isLossy = function _isLossy(options) {
    if (options === void 0) {
      options = {};
    }

    var merged = Object.assign({}, this.options, options);

    if (merged.lossless === false) {
      return true;
    } else {
      return false;
    }
  };

  _proto._root = function _root(rule, options) {
    if (options === void 0) {
      options = {};
    }

    var parser = new _parser["default"](rule, this._parseOptions(options));
    return parser.root;
  };

  _proto._parseOptions = function _parseOptions(options) {
    return {
      lossy: this._isLossy(options)
    };
  };

  _proto._run = function _run(rule, options) {
    var _this = this;

    if (options === void 0) {
      options = {};
    }

    return new Promise(function (resolve, reject) {
      try {
        var root = _this._root(rule, options);

        Promise.resolve(_this.func(root)).then(function (transform) {
          var string = undefined;

          if (_this._shouldUpdateSelector(rule, options)) {
            string = root.toString();
            rule.selector = string;
          }

          return {
            transform: transform,
            root: root,
            string: string
          };
        }).then(resolve, reject);
      } catch (e) {
        reject(e);
        return;
      }
    });
  };

  _proto._runSync = function _runSync(rule, options) {
    if (options === void 0) {
      options = {};
    }

    var root = this._root(rule, options);

    var transform = this.func(root);

    if (transform && typeof transform.then === "function") {
      throw new Error("Selector processor returned a promise to a synchronous call.");
    }

    var string = undefined;

    if (options.updateSelector && typeof rule !== "string") {
      string = root.toString();
      rule.selector = string;
    }

    return {
      transform: transform,
      root: root,
      string: string
    };
  }
  /**
   * Process rule into a selector AST.
   *
   * @param rule {postcss.Rule | string} The css selector to be processed
   * @param options The options for processing
   * @returns {Promise<parser.Root>} The AST of the selector after processing it.
   */
  ;

  _proto.ast = function ast(rule, options) {
    return this._run(rule, options).then(function (result) {
      return result.root;
    });
  }
  /**
   * Process rule into a selector AST synchronously.
   *
   * @param rule {postcss.Rule | string} The css selector to be processed
   * @param options The options for processing
   * @returns {parser.Root} The AST of the selector after processing it.
   */
  ;

  _proto.astSync = function astSync(rule, options) {
    return this._runSync(rule, options).root;
  }
  /**
   * Process a selector into a transformed value asynchronously
   *
   * @param rule {postcss.Rule | string} The css selector to be processed
   * @param options The options for processing
   * @returns {Promise<any>} The value returned by the processor.
   */
  ;

  _proto.transform = function transform(rule, options) {
    return this._run(rule, options).then(function (result) {
      return result.transform;
    });
  }
  /**
   * Process a selector into a transformed value synchronously.
   *
   * @param rule {postcss.Rule | string} The css selector to be processed
   * @param options The options for processing
   * @returns {any} The value returned by the processor.
   */
  ;

  _proto.transformSync = function transformSync(rule, options) {
    return this._runSync(rule, options).transform;
  }
  /**
   * Process a selector into a new selector string asynchronously.
   *
   * @param rule {postcss.Rule | string} The css selector to be processed
   * @param options The options for processing
   * @returns {string} the selector after processing.
   */
  ;

  _proto.process = function process(rule, options) {
    return this._run(rule, options).then(function (result) {
      return result.string || result.root.toString();
    });
  }
  /**
   * Process a selector into a new selector string synchronously.
   *
   * @param rule {postcss.Rule | string} The css selector to be processed
   * @param options The options for processing
   * @returns {string} the selector after processing.
   */
  ;

  _proto.processSync = function processSync(rule, options) {
    var result = this._runSync(rule, options);

    return result.string || result.root.toString();
  };

  return Processor;
}();

exports["default"] = Processor;
module.exports = exports.default;
});

/*@__PURE__*/getDefaultExportFromCjs(processor$1);

var constructors = createCommonjsModule(function (module, exports) {

exports.__esModule = true;
exports.universal = exports.tag = exports.string = exports.selector = exports.root = exports.pseudo = exports.nesting = exports.id = exports.comment = exports.combinator = exports.className = exports.attribute = void 0;

var _attribute = _interopRequireDefault(attribute);

var _className = _interopRequireDefault(className);

var _combinator = _interopRequireDefault(combinator);

var _comment = _interopRequireDefault(comment$1);

var _id = _interopRequireDefault(id);

var _nesting = _interopRequireDefault(nesting);

var _pseudo = _interopRequireDefault(pseudo);

var _root = _interopRequireDefault(root$1);

var _selector = _interopRequireDefault(selector);

var _string = _interopRequireDefault(string);

var _tag = _interopRequireDefault(tag);

var _universal = _interopRequireDefault(universal);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }

var attribute$1 = function attribute(opts) {
  return new _attribute["default"](opts);
};

exports.attribute = attribute$1;

var className$1 = function className(opts) {
  return new _className["default"](opts);
};

exports.className = className$1;

var combinator$1 = function combinator(opts) {
  return new _combinator["default"](opts);
};

exports.combinator = combinator$1;

var comment = function comment(opts) {
  return new _comment["default"](opts);
};

exports.comment = comment;

var id$1 = function id(opts) {
  return new _id["default"](opts);
};

exports.id = id$1;

var nesting$1 = function nesting(opts) {
  return new _nesting["default"](opts);
};

exports.nesting = nesting$1;

var pseudo$1 = function pseudo(opts) {
  return new _pseudo["default"](opts);
};

exports.pseudo = pseudo$1;

var root = function root(opts) {
  return new _root["default"](opts);
};

exports.root = root;

var selector$1 = function selector(opts) {
  return new _selector["default"](opts);
};

exports.selector = selector$1;

var string$1 = function string(opts) {
  return new _string["default"](opts);
};

exports.string = string$1;

var tag$1 = function tag(opts) {
  return new _tag["default"](opts);
};

exports.tag = tag$1;

var universal$1 = function universal(opts) {
  return new _universal["default"](opts);
};

exports.universal = universal$1;
});

var guards = createCommonjsModule(function (module, exports) {

exports.__esModule = true;
exports.isNode = isNode;
exports.isPseudoElement = isPseudoElement;
exports.isPseudoClass = isPseudoClass;
exports.isContainer = isContainer;
exports.isNamespace = isNamespace;
exports.isUniversal = exports.isTag = exports.isString = exports.isSelector = exports.isRoot = exports.isPseudo = exports.isNesting = exports.isIdentifier = exports.isComment = exports.isCombinator = exports.isClassName = exports.isAttribute = void 0;



var _IS_TYPE;

var IS_TYPE = (_IS_TYPE = {}, _IS_TYPE[types$1.ATTRIBUTE] = true, _IS_TYPE[types$1.CLASS] = true, _IS_TYPE[types$1.COMBINATOR] = true, _IS_TYPE[types$1.COMMENT] = true, _IS_TYPE[types$1.ID] = true, _IS_TYPE[types$1.NESTING] = true, _IS_TYPE[types$1.PSEUDO] = true, _IS_TYPE[types$1.ROOT] = true, _IS_TYPE[types$1.SELECTOR] = true, _IS_TYPE[types$1.STRING] = true, _IS_TYPE[types$1.TAG] = true, _IS_TYPE[types$1.UNIVERSAL] = true, _IS_TYPE);

function isNode(node) {
  return typeof node === "object" && IS_TYPE[node.type];
}

function isNodeType(type, node) {
  return isNode(node) && node.type === type;
}

var isAttribute = isNodeType.bind(null, types$1.ATTRIBUTE);
exports.isAttribute = isAttribute;
var isClassName = isNodeType.bind(null, types$1.CLASS);
exports.isClassName = isClassName;
var isCombinator = isNodeType.bind(null, types$1.COMBINATOR);
exports.isCombinator = isCombinator;
var isComment = isNodeType.bind(null, types$1.COMMENT);
exports.isComment = isComment;
var isIdentifier = isNodeType.bind(null, types$1.ID);
exports.isIdentifier = isIdentifier;
var isNesting = isNodeType.bind(null, types$1.NESTING);
exports.isNesting = isNesting;
var isPseudo = isNodeType.bind(null, types$1.PSEUDO);
exports.isPseudo = isPseudo;
var isRoot = isNodeType.bind(null, types$1.ROOT);
exports.isRoot = isRoot;
var isSelector = isNodeType.bind(null, types$1.SELECTOR);
exports.isSelector = isSelector;
var isString = isNodeType.bind(null, types$1.STRING);
exports.isString = isString;
var isTag = isNodeType.bind(null, types$1.TAG);
exports.isTag = isTag;
var isUniversal = isNodeType.bind(null, types$1.UNIVERSAL);
exports.isUniversal = isUniversal;

function isPseudoElement(node) {
  return isPseudo(node) && node.value && (node.value.startsWith("::") || node.value.toLowerCase() === ":before" || node.value.toLowerCase() === ":after");
}

function isPseudoClass(node) {
  return isPseudo(node) && !isPseudoElement(node);
}

function isContainer(node) {
  return !!(isNode(node) && node.walk);
}

function isNamespace(node) {
  return isAttribute(node) || isTag(node);
}
});

var selectors = createCommonjsModule(function (module, exports) {

exports.__esModule = true;



Object.keys(types$1).forEach(function (key) {
  if (key === "default" || key === "__esModule") return;
  if (key in exports && exports[key] === types$1[key]) return;
  exports[key] = types$1[key];
});



Object.keys(constructors).forEach(function (key) {
  if (key === "default" || key === "__esModule") return;
  if (key in exports && exports[key] === constructors[key]) return;
  exports[key] = constructors[key];
});



Object.keys(guards).forEach(function (key) {
  if (key === "default" || key === "__esModule") return;
  if (key in exports && exports[key] === guards[key]) return;
  exports[key] = guards[key];
});
});

var dist = createCommonjsModule(function (module, exports) {

exports.__esModule = true;
exports["default"] = void 0;

var _processor = _interopRequireDefault(processor$1);

var selectors$1 = _interopRequireWildcard(selectors);

function _getRequireWildcardCache() { if (typeof WeakMap !== "function") return null; var cache = new WeakMap(); _getRequireWildcardCache = function _getRequireWildcardCache() { return cache; }; return cache; }

function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } if (obj === null || typeof obj !== "object" && typeof obj !== "function") { return { "default": obj }; } var cache = _getRequireWildcardCache(); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj["default"] = obj; if (cache) { cache.set(obj, newObj); } return newObj; }

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }

var parser = function parser(processor) {
  return new _processor["default"](processor);
};

Object.assign(parser, selectors$1);
delete parser.__esModule;
var _default = parser;
exports["default"] = _default;
module.exports = exports.default;
});

var selectorParser = /*@__PURE__*/getDefaultExportFromCjs(dist);

const animationNameRE = /^(-\w+-)?animation-name$/;
const animationRE = /^(-\w+-)?animation$/;
const scopedPlugin = (id = '') => {
    const keyframes = Object.create(null);
    const shortId = id.replace(/^data-v-/, '');
    return {
        postcssPlugin: 'vue-sfc-scoped',
        Rule(rule) {
            processRule(id, rule);
        },
        AtRule(node) {
            if (/-?keyframes$/.test(node.name) &&
                !node.params.endsWith(`-${shortId}`)) {
                // register keyframes
                keyframes[node.params] = node.params = node.params + '-' + shortId;
            }
        },
        OnceExit(root) {
            if (Object.keys(keyframes).length) {
                // If keyframes are found in this <style>, find and rewrite animation names
                // in declarations.
                // Caveat: this only works for keyframes and animation rules in the same
                // <style> element.
                // individual animation-name declaration
                root.walkDecls(decl => {
                    if (animationNameRE.test(decl.prop)) {
                        decl.value = decl.value
                            .split(',')
                            .map(v => keyframes[v.trim()] || v.trim())
                            .join(',');
                    }
                    // shorthand
                    if (animationRE.test(decl.prop)) {
                        decl.value = decl.value
                            .split(',')
                            .map(v => {
                            const vals = v.trim().split(/\s+/);
                            const i = vals.findIndex(val => keyframes[val]);
                            if (i !== -1) {
                                vals.splice(i, 1, keyframes[vals[i]]);
                                return vals.join(' ');
                            }
                            else {
                                return v;
                            }
                        })
                            .join(',');
                    }
                });
            }
        }
    };
};
const processedRules = new WeakSet();
function processRule(id, rule) {
    if (processedRules.has(rule) ||
        (rule.parent &&
            rule.parent.type === 'atrule' &&
            /-?keyframes$/.test(rule.parent.name))) {
        return;
    }
    processedRules.add(rule);
    rule.selector = selectorParser(selectorRoot => {
        selectorRoot.each(selector => {
            rewriteSelector(id, selector, selectorRoot);
        });
    }).processSync(rule.selector);
}
function rewriteSelector(id, selector, selectorRoot, slotted = false) {
    let node = null;
    let shouldInject = true;
    // find the last child node to insert attribute selector
    selector.each(n => {
        // DEPRECATED ">>>" and "/deep/" combinator
        if (n.type === 'combinator' &&
            (n.value === '>>>' || n.value === '/deep/')) {
            n.value = ' ';
            n.spaces.before = n.spaces.after = '';
            warn(`the >>> and /deep/ combinators have been deprecated. ` +
                `Use :deep() instead.`);
            return false;
        }
        if (n.type === 'pseudo') {
            const { value } = n;
            // deep: inject [id] attribute at the node before the ::v-deep
            // combinator.
            if (value === ':deep' || value === '::v-deep') {
                if (n.nodes.length) {
                    // .foo ::v-deep(.bar) -> .foo[xxxxxxx] .bar
                    // replace the current node with ::v-deep's inner selector
                    let last = n;
                    n.nodes[0].each(ss => {
                        selector.insertAfter(last, ss);
                        last = ss;
                    });
                    // insert a space combinator before if it doesn't already have one
                    const prev = selector.at(selector.index(n) - 1);
                    if (!prev || !isSpaceCombinator(prev)) {
                        selector.insertAfter(n, selectorParser.combinator({
                            value: ' '
                        }));
                    }
                    selector.removeChild(n);
                }
                else {
                    // DEPRECATED usage
                    // .foo ::v-deep .bar -> .foo[xxxxxxx] .bar
                    warn(`::v-deep usage as a combinator has ` +
                        `been deprecated. Use :deep(<inner-selector>) instead.`);
                    const prev = selector.at(selector.index(n) - 1);
                    if (prev && isSpaceCombinator(prev)) {
                        selector.removeChild(prev);
                    }
                    selector.removeChild(n);
                }
                return false;
            }
            // slot: use selector inside `::v-slotted` and inject [id + '-s']
            // instead.
            // ::v-slotted(.foo) -> .foo[xxxxxxx-s]
            if (value === ':slotted' || value === '::v-slotted') {
                rewriteSelector(id, n.nodes[0], selectorRoot, true /* slotted */);
                let last = n;
                n.nodes[0].each(ss => {
                    selector.insertAfter(last, ss);
                    last = ss;
                });
                // selector.insertAfter(n, n.nodes[0])
                selector.removeChild(n);
                // since slotted attribute already scopes the selector there's no
                // need for the non-slot attribute.
                shouldInject = false;
                return false;
            }
            // global: replace with inner selector and do not inject [id].
            // ::v-global(.foo) -> .foo
            if (value === ':global' || value === '::v-global') {
                selectorRoot.insertAfter(selector, n.nodes[0]);
                selectorRoot.removeChild(selector);
                return false;
            }
        }
        if (n.type !== 'pseudo' && n.type !== 'combinator') {
            node = n;
        }
    });
    if (node) {
        node.spaces.after = '';
    }
    else {
        // For deep selectors & standalone pseudo selectors,
        // the attribute selectors are prepended rather than appended.
        // So all leading spaces must be eliminated to avoid problems.
        selector.first.spaces.before = '';
    }
    if (shouldInject) {
        const idToAdd = slotted ? id + '-s' : id;
        selector.insertAfter(
        // If node is null it means we need to inject [id] at the start
        // insertAfter can handle `null` here
        node, selectorParser.attribute({
            attribute: idToAdd,
            value: idToAdd,
            raws: {},
            quoteMark: `"`
        }));
    }
}
function isSpaceCombinator(node) {
    return node.type === 'combinator' && /^\s+$/.test(node.value);
}
scopedPlugin.postcss = true;

var SourceMapConsumer$7 = sourceMap.SourceMapConsumer;
var SourceMapGenerator$9 = sourceMap.SourceMapGenerator;

var mergeSourceMap = merge$1;

/**
 * Merge old source map and new source map and return merged.
 * If old or new source map value is falsy, return another one as it is.
 *
 * @param {object|string} [oldMap] old source map object
 * @param {object|string} [newmap] new source map object
 * @return {object|undefined} merged source map object, or undefined when both old and new source map are undefined
 */
function merge$1(oldMap, newMap) {
  if (!oldMap) return newMap
  if (!newMap) return oldMap

  var oldMapConsumer = new SourceMapConsumer$7(oldMap);
  var newMapConsumer = new SourceMapConsumer$7(newMap);
  var mergedMapGenerator = new SourceMapGenerator$9();

  // iterate on new map and overwrite original position of new map with one of old map
  newMapConsumer.eachMapping(function(m) {
    // pass when `originalLine` is null.
    // It occurs in case that the node does not have origin in original code.
    if (m.originalLine == null) return

    var origPosInOldMap = oldMapConsumer.originalPositionFor({
      line: m.originalLine,
      column: m.originalColumn
    });

    if (origPosInOldMap.source == null) return

    mergedMapGenerator.addMapping({
      original: {
        line: origPosInOldMap.line,
        column: origPosInOldMap.column
      },
      generated: {
        line: m.generatedLine,
        column: m.generatedColumn
      },
      source: origPosInOldMap.source,
      name: origPosInOldMap.name
    });
  });

  var consumers = [oldMapConsumer, newMapConsumer];
  consumers.forEach(function(consumer) {
    consumer.sources.forEach(function(sourceFile) {
      mergedMapGenerator._sources.add(sourceFile);
      var sourceContent = consumer.sourceContentFor(sourceFile);
      if (sourceContent != null) {
        mergedMapGenerator.setSourceContent(sourceFile, sourceContent);
      }
    });
  });

  mergedMapGenerator._sourceRoot = oldMap.sourceRoot;
  mergedMapGenerator._file = oldMap.file;

  return JSON.parse(mergedMapGenerator.toString())
}

// .scss/.sass processor
const scss = (source, map, options, load = require) => {
    const nodeSass = load('sass');
    const finalOptions = Object.assign(Object.assign({}, options), { data: getSource(source, options.filename, options.additionalData), file: options.filename, outFile: options.filename, sourceMap: !!map });
    try {
        const result = nodeSass.renderSync(finalOptions);
        const dependencies = result.stats.includedFiles;
        if (map) {
            return {
                code: result.css.toString(),
                map: mergeSourceMap(map, JSON.parse(result.map.toString())),
                errors: [],
                dependencies
            };
        }
        return { code: result.css.toString(), errors: [], dependencies };
    }
    catch (e) {
        return { code: '', errors: [e], dependencies: [] };
    }
};
const sass = (source, map, options, load) => scss(source, map, Object.assign(Object.assign({}, options), { indentedSyntax: true }), load);
// .less
const less = (source, map, options, load = require) => {
    const nodeLess = load('less');
    let result;
    let error = null;
    nodeLess.render(getSource(source, options.filename, options.additionalData), Object.assign(Object.assign({}, options), { syncImport: true }), (err, output) => {
        error = err;
        result = output;
    });
    if (error)
        return { code: '', errors: [error], dependencies: [] };
    const dependencies = result.imports;
    if (map) {
        return {
            code: result.css.toString(),
            map: mergeSourceMap(map, result.map),
            errors: [],
            dependencies: dependencies
        };
    }
    return {
        code: result.css.toString(),
        errors: [],
        dependencies: dependencies
    };
};
// .styl
const styl = (source, map, options, load = require) => {
    const nodeStylus = load('stylus');
    try {
        const ref = nodeStylus(source);
        Object.keys(options).forEach(key => ref.set(key, options[key]));
        if (map)
            ref.set('sourcemap', { inline: false, comment: false });
        const result = ref.render();
        const dependencies = ref.deps();
        if (map) {
            return {
                code: result,
                map: mergeSourceMap(map, ref.sourcemap),
                errors: [],
                dependencies
            };
        }
        return { code: result, errors: [], dependencies };
    }
    catch (e) {
        return { code: '', errors: [e], dependencies: [] };
    }
};
function getSource(source, filename, additionalData) {
    if (!additionalData)
        return source;
    if (isFunction(additionalData)) {
        return additionalData(source, filename);
    }
    return additionalData + source;
}
const processors = {
    less,
    sass,
    scss,
    styl,
    stylus: styl
};

function compileStyle(options) {
    return doCompileStyle(Object.assign(Object.assign({}, options), { isAsync: false }));
}
function compileStyleAsync(options) {
    return doCompileStyle(Object.assign(Object.assign({}, options), { isAsync: true }));
}
function doCompileStyle(options) {
    const { filename, id, scoped = false, trim = true, isProd = false, modules = false, modulesOptions = {}, preprocessLang, postcssOptions, postcssPlugins } = options;
    const preprocessor = preprocessLang && processors[preprocessLang];
    const preProcessedSource = preprocessor && preprocess$1(options, preprocessor);
    const map = preProcessedSource
        ? preProcessedSource.map
        : options.inMap || options.map;
    const source = preProcessedSource ? preProcessedSource.code : options.source;
    const shortId = id.replace(/^data-v-/, '');
    const longId = `data-v-${shortId}`;
    const plugins = (postcssPlugins || []).slice();
    plugins.unshift(cssVarsPlugin({ id: shortId, isProd }));
    if (trim) {
        plugins.push(trimPlugin());
    }
    if (scoped) {
        plugins.push(scopedPlugin(longId));
    }
    let cssModules;
    if (modules) {
        {
            throw new Error('[@vue/compiler-sfc] `modules` option is not supported in the browser build.');
        }
    }
    const postCSSOptions = Object.assign(Object.assign({}, postcssOptions), { to: filename, from: filename });
    if (map) {
        postCSSOptions.map = {
            inline: false,
            annotation: false,
            prev: map
        };
    }
    let result;
    let code;
    let outMap;
    // stylus output include plain css. so need remove the repeat item
    const dependencies = new Set(preProcessedSource ? preProcessedSource.dependencies : []);
    // sass has filename self when provided filename option
    dependencies.delete(filename);
    const errors = [];
    if (preProcessedSource && preProcessedSource.errors.length) {
        errors.push(...preProcessedSource.errors);
    }
    const recordPlainCssDependencies = (messages) => {
        messages.forEach(msg => {
            if (msg.type === 'dependency') {
                // postcss output path is absolute position path
                dependencies.add(msg.file);
            }
        });
        return dependencies;
    };
    try {
        result = postcss_1(plugins).process(source, postCSSOptions);
        // In async mode, return a promise.
        if (options.isAsync) {
            return result
                .then(result => ({
                code: result.css || '',
                map: result.map && result.map.toJSON(),
                errors,
                modules: cssModules,
                rawResult: result,
                dependencies: recordPlainCssDependencies(result.messages)
            }))
                .catch(error => ({
                code: '',
                map: undefined,
                errors: [...errors, error],
                rawResult: undefined,
                dependencies
            }));
        }
        recordPlainCssDependencies(result.messages);
        // force synchronous transform (we know we only have sync plugins)
        code = result.css;
        outMap = result.map;
    }
    catch (e) {
        errors.push(e);
    }
    return {
        code: code || ``,
        map: outMap && outMap.toJSON(),
        errors,
        rawResult: result,
        dependencies
    };
}
function preprocess$1(options, preprocessor) {
    if (!options.preprocessCustomRequire) {
        throw new Error(`[@vue/compiler-sfc] Style preprocessing in the browser build must ` +
            `provide the \`preprocessCustomRequire\` option to return the in-browser ` +
            `version of the preprocessor.`);
    }
    return preprocessor(options.source, options.inMap || options.map, Object.assign({ filename: options.filename }, options.preprocessOptions), options.preprocessCustomRequire);
}

// API
const walk$2 = walk$1;

export { MagicString, parse_1 as babelParse, compileScript, compileStyle, compileStyleAsync, compileTemplate, extractIdentifiers, generateCodeFrame, isInDestructureAssignment, isStaticProperty, parse$4 as parse, rewriteDefault, shouldTransform as shouldTransformRef, transform$1 as transformRef, transformAST as transformRefAST, walk$2 as walk, walkIdentifiers };