@endo/cjs-module-analyzer
Version:
A JavaScript lexer dedicated to static analysis and transformation of ECMAScript modules.
1,353 lines (1,299 loc) • 58.9 kB
JavaScript
// @ts-check
/* eslint no-bitwise: ["off"] */
/* eslint no-plusplus: ["off"] */
/* eslint no-use-before-define: ["off"] */
/* eslint default-case: ["off"] */
/* eslint default-case-last: ["off"] */
/* eslint no-continue: ["off"] */
/* eslint no-shadow: ["off"] */
/* eslint no-unreachable-loop: ["off"] */
/* eslint @endo/restrict-comparison-operands: ["off"] */
let source;
let pos;
let end;
let openTokenDepth;
let templateDepth;
let lastTokenPos;
let lastSlashWasDivision;
let templateStack;
let templateStackDepth;
let openTokenPosStack;
let openClassPosStack;
let nextBraceIsClass;
let starExportMap;
let lastStarExportSpecifier;
let myexports;
let unsafeGetters;
let reexports;
let requires;
function resetState() {
openTokenDepth = 0;
templateDepth = -1;
lastTokenPos = -1;
lastSlashWasDivision = false;
templateStack = new Array(1024);
templateStackDepth = 0;
openTokenPosStack = new Array(1024);
openClassPosStack = new Array(1024);
nextBraceIsClass = false;
starExportMap = Object.create(null);
lastStarExportSpecifier = null;
myexports = new Set();
unsafeGetters = new Set();
reexports = new Set();
requires = [];
}
/** @typedef {0 | 1 | 2} RequireType */
const Import = 0;
const ExportAssign = 1;
const ExportStar = 2;
const strictReserved = new Set([
'implements',
'interface',
'let',
'package',
'private',
'protected',
'public',
'static',
'yield',
'enum',
]);
/**
* @param {string} cjsSource
* @param {string} [name]
*/
export function analyzeCommonJS(cjsSource, name = '<unknown>') {
resetState();
try {
parseSource(cjsSource);
} catch (e) {
e.message += `\n at ${name}:${
cjsSource.slice(0, pos).split('\n').length
}:${pos - cjsSource.lastIndexOf('\n', pos - 1)}`;
e.loc = pos;
throw e;
}
const result = {
exports: [...myexports].filter(expt => !unsafeGetters.has(expt)),
reexports: [...reexports],
requires,
};
resetState();
return result;
}
/**
* @param {string} name
*/
function addExport(name) {
if (!strictReserved.has(name)) myexports.add(name);
}
/**
* @param {string} cjsSource
*/
function parseSource(cjsSource) {
source = cjsSource;
pos = -1;
end = source.length - 1;
let ch = 0;
// Handle #!
if (
source.charCodeAt(0) === 35 /* # */ &&
source.charCodeAt(1) === 33 /*!*/
) {
if (source.length === 2) return;
pos += 2;
while (pos++ < end) {
ch = source.charCodeAt(pos);
if (ch === 10 /* \n */ || ch === 13 /* \r */) break;
}
}
while (pos++ < end) {
ch = source.charCodeAt(pos);
if (ch === 32 || (ch < 14 && ch > 8)) continue;
if (openTokenDepth === 0) {
switch (ch) {
case 105 /* i */:
if (source.startsWith('mport', pos + 1) && keywordStart(pos))
throwIfImportStatement();
lastTokenPos = pos;
continue;
case 114 /* r */: {
const startPos = pos;
if (tryParseRequire(Import) && keywordStart(startPos))
tryBacktrackAddStarExportBinding(startPos - 1);
lastTokenPos = pos;
continue;
}
case 95 /* _ */:
if (
source.startsWith('interopRequireWildcard', pos + 1) &&
(keywordStart(pos) || source.charCodeAt(pos - 1) === 46) /* . */
) {
const startPos = pos;
pos += 23;
if (source.charCodeAt(pos) === 40 /* ( */) {
pos++;
openTokenPosStack[openTokenDepth++] = lastTokenPos;
if (tryParseRequire(Import) && keywordStart(startPos)) {
tryBacktrackAddStarExportBinding(startPos - 1);
}
}
} else if (
source.startsWith('_export', pos + 1) &&
(keywordStart(pos) || source.charCodeAt(pos - 1) === 46) /* . */
) {
pos += 8;
if (source.startsWith('Star', pos)) pos += 4;
if (source.charCodeAt(pos) === 40 /* ( */) {
openTokenPosStack[openTokenDepth++] = lastTokenPos;
if (source.charCodeAt(++pos) === 114 /* r */)
tryParseRequire(ExportStar);
}
}
lastTokenPos = pos;
continue;
}
}
switch (ch) {
case 114 /* r */: {
const startPos = pos;
if (tryParseRequire(Import) && keywordStart(startPos))
tryBacktrackAddStarExportBinding(startPos - 1);
lastTokenPos = pos;
continue;
}
case 101 /* e */:
if (source.startsWith('xport', pos + 1) && keywordStart(pos)) {
if (source.charCodeAt(pos + 6) === 115 /* s */)
tryParseExportsDotAssign(false);
else if (openTokenDepth === 0) throwIfExportStatement();
}
break;
case 99 /* c */:
if (
keywordStart(pos) &&
source.startsWith('lass', pos + 1) &&
isBrOrWs(source.charCodeAt(pos + 5))
)
nextBraceIsClass = true;
break;
case 109 /* m */:
if (source.startsWith('odule', pos + 1) && keywordStart(pos))
tryParseModuleDotExportsAssign();
break;
case 79 /* O */:
if (source.startsWith('bject', pos + 1) && keywordStart(pos))
tryParseObjectDefineOrKeys(openTokenDepth === 0);
break;
case 40 /* ( */:
openTokenPosStack[openTokenDepth++] = lastTokenPos;
break;
case 41 /* ) */:
if (openTokenDepth === 0) throw Error('Unexpected closing bracket.');
openTokenDepth--;
break;
case 123 /* { */:
openClassPosStack[openTokenDepth] = nextBraceIsClass;
nextBraceIsClass = false;
openTokenPosStack[openTokenDepth++] = lastTokenPos;
break;
case 125 /* } */:
if (openTokenDepth === 0) throw Error('Unexpected closing brace.');
if (openTokenDepth-- === templateDepth) {
templateDepth = templateStack[--templateStackDepth];
templateString();
} else if (templateDepth !== -1 && openTokenDepth < templateDepth)
throw Error('Unexpected closing brace.');
break;
case 60 /* > */:
// TODO: <!-- XML comment support
break;
case 39 /* ' */:
singleQuoteString();
break;
case 34 /* " */:
doubleQuoteString();
break;
case 47 /* / */: {
const nextCh = source.charCodeAt(pos + 1);
if (nextCh === 47 /* / */) {
lineComment();
// don't update lastToken
continue;
} else if (nextCh === 42 /***/) {
blockComment();
// don't update lastToken
continue;
} else {
// Division / regex ambiguity handling based on checking backtrack analysis of:
// - what token came previously (lastToken)
// - if a closing brace or paren, what token came before the corresponding
// opening brace or paren (lastOpenTokenIndex)
const lastToken = source.charCodeAt(lastTokenPos);
if (
(isExpressionPunctuator(lastToken) &&
!(
(
lastToken === 46 /* . */ &&
source.charCodeAt(lastTokenPos - 1) >= 48 /* 0 */ &&
source.charCodeAt(lastTokenPos - 1) <= 57
) /* 9 */
) &&
!(
(
lastToken === 43 /*+*/ &&
source.charCodeAt(lastTokenPos - 1) === 43
) /*+*/
) &&
!(
(
lastToken === 45 /*-*/ &&
source.charCodeAt(lastTokenPos - 1) === 45
) /*-*/
)) ||
(lastToken === 41 /* ) */ &&
isParenKeyword(openTokenPosStack[openTokenDepth])) ||
(lastToken === 125 /* } */ &&
(isExpressionTerminator(openTokenPosStack[openTokenDepth]) ||
openClassPosStack[openTokenDepth])) ||
(lastToken === 47 /* / */ && lastSlashWasDivision) ||
isExpressionKeyword(lastTokenPos) ||
!lastToken
) {
regularExpression();
lastSlashWasDivision = false;
} else {
lastSlashWasDivision = true;
}
}
break;
}
case 96 /* ` */:
templateString();
break;
}
lastTokenPos = pos;
}
if (templateDepth !== -1) throw Error('Unterminated template.');
if (openTokenDepth) throw Error('Unterminated braces.');
}
/**
* @param {number} bPos
*/
function tryBacktrackAddStarExportBinding(bPos) {
while (source.charCodeAt(bPos) === 32 /* */ && bPos >= 0) bPos--;
if (source.charCodeAt(bPos) === 61 /*=*/) {
bPos--;
while (source.charCodeAt(bPos) === 32 /* */ && bPos >= 0) bPos--;
let codePoint;
const idEnd = bPos;
/** @type {boolean | undefined} */
let identifierStart = false;
for (;;) {
codePoint = codePointAtLast(bPos);
if (codePoint === 0 || bPos < 0) {
break;
}
if (codePoint === 92 /* \ */) return;
if (!isIdentifierChar(codePoint, true)) break;
identifierStart = isIdentifierStart(codePoint, true);
bPos -= codePointLen(codePoint);
}
if (identifierStart && source.charCodeAt(bPos) === 32 /* */) {
const starExportId = source.slice(bPos + 1, idEnd + 1);
while (source.charCodeAt(bPos) === 32 /* */ && bPos >= 0) bPos--;
switch (source.charCodeAt(bPos)) {
case 114 /* r */:
if (!source.startsWith('va', bPos - 2)) return;
break;
case 116 /* t */:
if (
!source.startsWith('le', bPos - 2) &&
!source.startsWith('cons', bPos - 4)
)
return;
break;
default:
return;
}
starExportMap[starExportId] = lastStarExportSpecifier;
}
}
}
// `Object.` `prototype.`? hasOwnProperty.call(` IDENTIFIER `, ` IDENTIFIER$2 `)`
/**
* @param {string} itId
*/
function tryParseObjectHasOwnProperty(itId) {
let ch = commentWhitespace();
if (ch !== 79 /* O */ || !source.startsWith('bject', pos + 1)) return false;
pos += 6;
ch = commentWhitespace();
if (ch !== 46 /* . */) return false;
pos++;
ch = commentWhitespace();
if (ch === 112 /* p */) {
if (!source.startsWith('rototype', pos + 1)) return false;
pos += 9;
ch = commentWhitespace();
if (ch !== 46 /* . */) return false;
pos++;
ch = commentWhitespace();
}
if (ch !== 104 /* h */ || !source.startsWith('asOwnProperty', pos + 1))
return false;
pos += 14;
ch = commentWhitespace();
if (ch !== 46 /* . */) return false;
pos++;
ch = commentWhitespace();
if (ch !== 99 /* c */ || !source.startsWith('all', pos + 1)) return false;
pos += 4;
ch = commentWhitespace();
if (ch !== 40 /* ( */) return false;
pos++;
ch = commentWhitespace();
if (!identifier()) return false;
ch = commentWhitespace();
if (ch !== 44 /* , */) return false;
pos++;
ch = commentWhitespace();
if (!source.startsWith(itId, pos)) return false;
pos += itId.length;
ch = commentWhitespace();
if (ch !== 41 /* ) */) return false;
pos++;
return true;
}
/**
* @param {boolean} keys
*/
function tryParseObjectDefineOrKeys(keys) {
pos += 6;
let revertPos = pos - 1;
let ch = commentWhitespace();
if (ch === 46 /* . */) {
pos++;
ch = commentWhitespace();
if (ch === 100 /* d */ && source.startsWith('efineProperty', pos + 1)) {
let expt;
for (;;) {
pos += 14;
revertPos = pos - 1;
ch = commentWhitespace();
if (ch !== 40 /* ( */) break;
pos++;
ch = commentWhitespace();
if (!readExportsOrModuleDotExports(ch)) break;
ch = commentWhitespace();
if (ch !== 44 /* , */) break;
pos++;
ch = commentWhitespace();
if (ch !== 39 /* ' */ && ch !== 34 /* " */) break;
const quot = ch;
const exportPos = ++pos;
if (!identifier() || source.charCodeAt(pos) !== quot) break;
expt = source.slice(exportPos, pos);
pos++;
ch = commentWhitespace();
if (ch !== 44 /* , */) break;
pos++;
ch = commentWhitespace();
if (ch !== 123 /* { */) break;
pos++;
ch = commentWhitespace();
if (ch === 101 /* e */) {
if (!source.startsWith('numerable', pos + 1)) break;
pos += 10;
ch = commentWhitespace();
if (ch !== 58 /*:*/) break;
pos++;
ch = commentWhitespace();
if (ch !== 116 /* t */ || !source.startsWith('rue', pos + 1)) break;
pos += 4;
ch = commentWhitespace();
if (ch !== 44) break;
pos++;
ch = commentWhitespace();
}
if (ch === 118 /* v */) {
if (!source.startsWith('alue', pos + 1)) break;
pos += 5;
ch = commentWhitespace();
if (ch !== 58 /*:*/) break;
addExport(expt);
pos = revertPos;
return;
} else if (ch === 103 /* g */) {
if (!source.startsWith('et', pos + 1)) break;
pos += 3;
ch = commentWhitespace();
if (ch === 58 /*:*/) {
pos++;
ch = commentWhitespace();
if (ch !== 102 /* f */) break;
if (!source.startsWith('unction', pos + 1)) break;
pos += 8;
const lastPos = pos;
ch = commentWhitespace();
if (ch !== 40 && (lastPos === pos || !identifier())) break;
ch = commentWhitespace();
}
if (ch !== 40 /* ( */) break;
pos++;
ch = commentWhitespace();
if (ch !== 41 /* ) */) break;
pos++;
ch = commentWhitespace();
if (ch !== 123 /* { */) break;
pos++;
ch = commentWhitespace();
if (ch !== 114 /* r */) break;
if (!source.startsWith('eturn', pos + 1)) break;
pos += 6;
ch = commentWhitespace();
if (!identifier()) break;
ch = commentWhitespace();
if (ch === 46 /* . */) {
pos++;
commentWhitespace();
if (!identifier()) break;
ch = commentWhitespace();
} else if (ch === 91 /* [ */) {
pos++;
ch = commentWhitespace();
if (ch === 39 /* ' */) singleQuoteString();
else if (ch === 34 /* " */) doubleQuoteString();
else break;
pos++;
ch = commentWhitespace();
if (ch !== 93 /* ] */) break;
pos++;
ch = commentWhitespace();
}
if (ch === 59 /* ; */) {
pos++;
ch = commentWhitespace();
}
if (ch !== 125 /* } */) break;
pos++;
ch = commentWhitespace();
if (ch === 44 /* , */) {
pos++;
ch = commentWhitespace();
}
if (ch !== 125 /* } */) break;
pos++;
ch = commentWhitespace();
if (ch !== 41 /* ) */) break;
addExport(expt);
return;
}
break;
}
if (expt) {
unsafeGetters.add(expt);
}
} else if (
keys &&
ch === 107 /* k */ &&
source.startsWith('eys', pos + 1)
) {
for (;;) {
pos += 4;
revertPos = pos - 1;
ch = commentWhitespace();
if (ch !== 40 /* ( */) break;
pos++;
ch = commentWhitespace();
const idStart = pos;
if (!identifier()) break;
const id = source.slice(idStart, pos);
ch = commentWhitespace();
if (ch !== 41 /* ) */) break;
revertPos = pos++;
ch = commentWhitespace();
if (ch !== 46 /* . */) break;
pos++;
ch = commentWhitespace();
if (ch !== 102 /* f */ || !source.startsWith('orEach', pos + 1)) break;
pos += 7;
ch = commentWhitespace();
revertPos = pos - 1;
if (ch !== 40 /* ( */) break;
pos++;
ch = commentWhitespace();
if (ch !== 102 /* f */ || !source.startsWith('unction', pos + 1)) break;
pos += 8;
ch = commentWhitespace();
if (ch !== 40 /* ( */) break;
pos++;
ch = commentWhitespace();
const itIdStart = pos;
if (!identifier()) break;
const itId = source.slice(itIdStart, pos);
ch = commentWhitespace();
if (ch !== 41 /* ) */) break;
pos++;
ch = commentWhitespace();
if (ch !== 123 /* { */) break;
pos++;
ch = commentWhitespace();
if (ch !== 105 /* i */ || source.charCodeAt(pos + 1) !== 102 /* f */)
break;
pos += 2;
ch = commentWhitespace();
if (ch !== 40 /* ( */) break;
pos++;
ch = commentWhitespace();
if (!source.startsWith(itId, pos)) break;
pos += itId.length;
ch = commentWhitespace();
// `if (` IDENTIFIER$2 `===` ( `'default'` | `"default"` ) `||` IDENTIFIER$2 `===` ( '__esModule' | `"__esModule"` ) `) return` `;`? |
if (ch === 61 /*=*/) {
if (!source.startsWith('==', pos + 1)) break;
pos += 3;
ch = commentWhitespace();
if (ch !== 34 /* " */ && ch !== 39 /* ' */) break;
let quot = ch;
if (!source.startsWith('default', pos + 1)) break;
pos += 8;
ch = commentWhitespace();
if (ch !== quot) break;
pos += 1;
ch = commentWhitespace();
if (ch !== 124 /* | */ || source.charCodeAt(pos + 1) !== 124 /* | */)
break;
pos += 2;
ch = commentWhitespace();
if (source.slice(pos, pos + itId.length) !== itId) break;
pos += itId.length;
ch = commentWhitespace();
if (ch !== 61 /*=*/ || source.slice(pos + 1, pos + 3) !== '==') break;
pos += 3;
ch = commentWhitespace();
if (ch !== 34 /* " */ && ch !== 39 /* ' */) break;
quot = ch;
if (!source.startsWith('__esModule', pos + 1)) break;
pos += 11;
ch = commentWhitespace();
if (ch !== quot) break;
pos += 1;
ch = commentWhitespace();
if (ch !== 41 /* ) */) break;
pos += 1;
ch = commentWhitespace();
if (ch !== 114 /* r */ || !source.startsWith('eturn', pos + 1)) break;
pos += 6;
ch = commentWhitespace();
if (ch === 59 /* ; */) pos++;
ch = commentWhitespace();
// `if (`
if (
ch === 105 /* i */ &&
source.charCodeAt(pos + 1) === 102 /* f */
) {
let inIf = true;
pos += 2;
ch = commentWhitespace();
if (ch !== 40 /* ( */) break;
pos++;
const ifInnerPos = pos;
// `Object.prototype.hasOwnProperty.call(` IDENTIFIER `, ` IDENTIFIER$2 `)) return` `;`?
if (tryParseObjectHasOwnProperty(itId)) {
ch = commentWhitespace();
if (ch !== 41 /* ) */) break;
pos++;
ch = commentWhitespace();
if (ch !== 114 /* r */ || !source.startsWith('eturn', pos + 1))
break;
pos += 6;
ch = commentWhitespace();
if (ch === 59 /* ; */) pos++;
ch = commentWhitespace();
// match next if
if (
ch === 105 /* i */ &&
source.charCodeAt(pos + 1) === 102 /* f */
) {
pos += 2;
ch = commentWhitespace();
if (ch !== 40 /* ( */) break;
pos++;
} else {
inIf = false;
}
} else {
pos = ifInnerPos;
}
// IDENTIFIER$2 `in` EXPORTS_IDENTIFIER `&&` EXPORTS_IDENTIFIER `[` IDENTIFIER$2 `] ===` IDENTIFIER$1 `[` IDENTIFIER$2 `]) return` `;`?
if (inIf) {
if (!source.startsWith(itId, pos)) break;
pos += itId.length;
ch = commentWhitespace();
if (ch !== 105 /* i */ || !source.startsWith('n ', pos + 1))
break;
pos += 3;
ch = commentWhitespace();
if (!readExportsOrModuleDotExports(ch)) break;
ch = commentWhitespace();
if (
ch !== 38 /* & */ ||
source.charCodeAt(pos + 1) !== 38 /* & */
)
break;
pos += 2;
ch = commentWhitespace();
if (!readExportsOrModuleDotExports(ch)) break;
ch = commentWhitespace();
if (ch !== 91 /* [ */) break;
pos++;
ch = commentWhitespace();
if (!source.startsWith(itId, pos)) break;
pos += itId.length;
ch = commentWhitespace();
if (ch !== 93 /* ] */) break;
pos++;
ch = commentWhitespace();
if (ch !== 61 /*=*/ || !source.startsWith('==', pos + 1)) break;
pos += 3;
ch = commentWhitespace();
if (!source.startsWith(id, pos)) break;
pos += id.length;
ch = commentWhitespace();
if (ch !== 91 /* [ */) break;
pos++;
ch = commentWhitespace();
if (!source.startsWith(itId, pos)) break;
pos += itId.length;
ch = commentWhitespace();
if (ch !== 93 /* ] */) break;
pos++;
ch = commentWhitespace();
if (ch !== 41 /* ) */) break;
pos++;
ch = commentWhitespace();
if (ch !== 114 /* r */ || !source.startsWith('eturn', pos + 1))
break;
pos += 6;
ch = commentWhitespace();
if (ch === 59 /* ; */) pos++;
ch = commentWhitespace();
}
}
}
// `if (` IDENTIFIER$2 `!==` ( `'default'` | `"default"` ) (`&& !` IDENTIFIER `.hasOwnProperty(` IDENTIFIER$2 `)` )? `)`
else if (ch === 33 /*!*/) {
if (!source.startsWith('==', pos + 1)) break;
pos += 3;
ch = commentWhitespace();
if (ch !== 34 /* " */ && ch !== 39 /* ' */) break;
const quot = ch;
if (!source.startsWith('default', pos + 1)) break;
pos += 8;
ch = commentWhitespace();
if (ch !== quot) break;
pos += 1;
ch = commentWhitespace();
if (ch === 38 /* & */) {
if (source.charCodeAt(pos + 1) !== 38 /* & */) break;
pos += 2;
ch = commentWhitespace();
if (ch !== 33 /*!*/) break;
pos += 1;
ch = commentWhitespace();
if (source.startsWith(id, pos)) {
pos += id.length;
ch = commentWhitespace();
if (ch !== 46 /* . */) break;
pos++;
ch = commentWhitespace();
if (
ch !== 104 /* h */ ||
!source.startsWith('asOwnProperty', pos + 1)
)
break;
pos += 14;
ch = commentWhitespace();
if (ch !== 40 /* ( */) break;
pos += 1;
ch = commentWhitespace();
if (!source.startsWith(itId, pos)) break;
pos += itId.length;
ch = commentWhitespace();
if (ch !== 41 /* ) */) break;
pos += 1;
} else if (!tryParseObjectHasOwnProperty(itId)) break;
ch = commentWhitespace();
}
if (ch !== 41 /* ) */) break;
pos += 1;
ch = commentWhitespace();
} else break;
// EXPORTS_IDENTIFIER `[` IDENTIFIER$2 `] =` IDENTIFIER$1 `[` IDENTIFIER$2 `]`
if (readExportsOrModuleDotExports(ch)) {
ch = commentWhitespace();
if (ch !== 91 /* [ */) break;
pos++;
ch = commentWhitespace();
if (source.slice(pos, pos + itId.length) !== itId) break;
pos += itId.length;
ch = commentWhitespace();
if (ch !== 93 /* ] */) break;
pos++;
ch = commentWhitespace();
if (ch !== 61 /*=*/) break;
pos++;
ch = commentWhitespace();
if (source.slice(pos, pos + id.length) !== id) break;
pos += id.length;
ch = commentWhitespace();
if (ch !== 91 /* [ */) break;
pos++;
ch = commentWhitespace();
if (source.slice(pos, pos + itId.length) !== itId) break;
pos += itId.length;
ch = commentWhitespace();
if (ch !== 93 /* ] */) break;
pos++;
ch = commentWhitespace();
if (ch === 59 /* ; */) {
pos++;
ch = commentWhitespace();
}
}
// `Object.defineProperty(` EXPORTS_IDENTIFIER `, ` IDENTIFIER$2 `, { enumerable: true, get: function () { return ` IDENTIFIER$1 `[` IDENTIFIER$2 `]; } })`
else if (ch === 79 /* O */) {
if (source.slice(pos + 1, pos + 6) !== 'bject') break;
pos += 6;
ch = commentWhitespace();
if (ch !== 46 /* . */) break;
pos++;
ch = commentWhitespace();
if (
ch !== 100 /* d */ ||
!source.startsWith('efineProperty', pos + 1)
)
break;
pos += 14;
ch = commentWhitespace();
if (ch !== 40 /* ( */) break;
pos++;
ch = commentWhitespace();
if (!readExportsOrModuleDotExports(ch)) break;
ch = commentWhitespace();
if (ch !== 44 /* , */) break;
pos++;
ch = commentWhitespace();
if (!source.startsWith(itId, pos)) break;
pos += itId.length;
ch = commentWhitespace();
if (ch !== 44 /* , */) break;
pos++;
ch = commentWhitespace();
if (ch !== 123 /* { */) break;
pos++;
ch = commentWhitespace();
if (ch !== 101 /* e */ || !source.startsWith('numerable', pos + 1))
break;
pos += 10;
ch = commentWhitespace();
if (ch !== 58 /*:*/) break;
pos++;
ch = commentWhitespace();
if (ch !== 116 /* t */ && !source.startsWith('rue', pos + 1)) break;
pos += 4;
ch = commentWhitespace();
if (ch !== 44 /* , */) break;
pos++;
ch = commentWhitespace();
if (ch !== 103 /* g */ || !source.startsWith('et', pos + 1)) break;
pos += 3;
ch = commentWhitespace();
if (ch === 58 /*:*/) {
pos++;
ch = commentWhitespace();
if (ch !== 102 /* f */) break;
if (!source.startsWith('unction', pos + 1)) break;
pos += 8;
const lastPos = pos;
ch = commentWhitespace();
if (ch !== 40 && (lastPos === pos || !identifier())) break;
ch = commentWhitespace();
}
if (ch !== 40 /* ( */) break;
pos++;
ch = commentWhitespace();
if (ch !== 41 /* ) */) break;
pos++;
ch = commentWhitespace();
if (ch !== 123 /* { */) break;
pos++;
ch = commentWhitespace();
if (ch !== 114 /* r */ || !source.startsWith('eturn', pos + 1)) break;
pos += 6;
ch = commentWhitespace();
if (!source.startsWith(id, pos)) break;
pos += id.length;
ch = commentWhitespace();
if (ch !== 91 /* [ */) break;
pos++;
ch = commentWhitespace();
if (!source.startsWith(itId, pos)) break;
pos += itId.length;
ch = commentWhitespace();
if (ch !== 93 /* ] */) break;
pos++;
ch = commentWhitespace();
if (ch === 59 /* ; */) {
pos++;
ch = commentWhitespace();
}
if (ch !== 125 /* } */) break;
pos++;
ch = commentWhitespace();
if (ch === 44 /* , */) {
pos++;
ch = commentWhitespace();
}
if (ch !== 125 /* } */) break;
pos++;
ch = commentWhitespace();
if (ch !== 41 /* ) */) break;
pos++;
ch = commentWhitespace();
if (ch === 59 /* ; */) {
pos++;
ch = commentWhitespace();
}
} else break;
if (ch !== 125 /* } */) break;
pos++;
ch = commentWhitespace();
if (ch !== 41 /* ) */) break;
const starExportSpecifier = starExportMap[id];
if (starExportSpecifier) {
reexports.add(starExportSpecifier);
pos = revertPos;
return;
}
return;
}
}
}
pos = revertPos;
}
/**
* @param {number} ch
*/
function readExportsOrModuleDotExports(ch) {
const revertPos = pos;
if (ch === 109 /* m */ && source.startsWith('odule', pos + 1)) {
pos += 6;
ch = commentWhitespace();
if (ch !== 46 /* . */) {
pos = revertPos;
return false;
}
pos++;
ch = commentWhitespace();
}
if (ch === 101 /* e */ && source.startsWith('xports', pos + 1)) {
pos += 7;
return true;
} else {
pos = revertPos;
return false;
}
}
function tryParseModuleDotExportsAssign() {
pos += 6;
const revertPos = pos - 1;
let ch = commentWhitespace();
if (ch === 46 /* . */) {
pos++;
ch = commentWhitespace();
if (ch === 101 /* e */ && source.startsWith('xports', pos + 1)) {
tryParseExportsDotAssign(true);
return;
}
}
pos = revertPos;
}
/**
* @param {boolean} assign
*/
function tryParseExportsDotAssign(assign) {
pos += 7;
const revertPos = pos - 1;
let ch = commentWhitespace();
switch (ch) {
// exports.asdf
case 46 /* . */: {
pos++;
ch = commentWhitespace();
const startPos = pos;
if (identifier()) {
const endPos = pos;
ch = commentWhitespace();
if (ch === 61 /*=*/) {
addExport(source.slice(startPos, endPos));
return;
}
}
break;
}
// exports['asdf']
case 91 /* [ */: {
pos++;
ch = commentWhitespace();
if (ch === 39 /* ' */ || ch === 34 /* " */) {
pos++;
const startPos = pos;
if (identifier() && source.charCodeAt(pos) === ch) {
const endPos = pos++;
ch = commentWhitespace();
if (ch !== 93 /* ] */) break;
pos++;
ch = commentWhitespace();
if (ch !== 61 /*=*/) break;
addExport(source.slice(startPos, endPos));
}
}
break;
}
// module.exports =
case 61 /*=*/: {
if (assign) {
if (reexports.size) reexports = new Set();
pos++;
ch = commentWhitespace();
// { ... }
if (ch === 123 /* { */) {
tryParseLiteralExports();
return;
}
// require('...')
if (ch === 114 /* r */) {
if (tryParseRequire(ExportAssign)) {
return;
}
}
// e.g., function () {}
addExport('default');
}
}
}
pos = revertPos;
}
/**
* @param {RequireType} requireType
*/
function tryParseRequire(requireType) {
// require('...')
const revertPos = pos;
if (source.startsWith('equire', pos + 1)) {
pos += 7;
let ch = commentWhitespace();
if (ch === 40 /* ( */) {
pos++;
ch = commentWhitespace();
const reexportStart = pos + 1;
if (ch === 39 /* ' */) {
const simple = singleQuoteString();
const reexportEnd = pos++;
ch = commentWhitespace();
if (ch === 41 /* ) */) {
if (simple) {
const exportSpecifier = source.slice(reexportStart, reexportEnd);
requires.push(exportSpecifier);
switch (requireType) {
case ExportAssign:
reexports.add(exportSpecifier);
return true;
case ExportStar:
reexports.add(exportSpecifier);
return true;
default:
lastStarExportSpecifier = exportSpecifier;
return true;
}
}
}
} else if (ch === 34 /* " */) {
const simple = doubleQuoteString();
const reexportEnd = pos++;
ch = commentWhitespace();
if (ch === 41 /* ) */) {
if (simple) {
const exportSpecifier = source.slice(reexportStart, reexportEnd);
requires.push(exportSpecifier);
switch (requireType) {
case ExportAssign:
reexports.add(exportSpecifier);
return true;
case ExportStar:
reexports.add(exportSpecifier);
return true;
default:
lastStarExportSpecifier = exportSpecifier;
return true;
}
}
}
}
}
pos = revertPos;
}
return false;
}
function tryParseLiteralExports() {
const revertPos = pos - 1;
while (pos++ < end) {
let ch = commentWhitespace();
let startPos = pos;
if (identifier()) {
const endPos = pos;
ch = commentWhitespace();
if (ch === 58 /*:*/) {
pos++;
ch = commentWhitespace();
// nothing more complex than identifier expressions for now
if (!identifier()) {
pos = revertPos;
return;
}
ch = source.charCodeAt(pos);
}
addExport(source.slice(startPos, endPos));
} else if (ch === 46 /* . */ && source.startsWith('..', pos + 1)) {
pos += 3;
if (
source.charCodeAt(pos) === 114 /* r */ &&
tryParseRequire(ExportAssign)
) {
pos++;
} else if (!identifier()) {
pos = revertPos;
return;
}
ch = commentWhitespace();
} else if (ch === 39 /* ' */ || ch === 34 /* " */) {
startPos = ++pos;
if (identifier() && source.charCodeAt(pos) === ch) {
const endPos = pos++;
ch = commentWhitespace();
if (ch === 58 /*:*/) {
pos++;
ch = commentWhitespace();
// nothing more complex than identifier expressions for now
if (!identifier()) {
pos = revertPos;
return;
}
ch = source.charCodeAt(pos);
addExport(source.slice(startPos, endPos));
}
}
} else {
pos = revertPos;
return;
}
if (ch === 125 /* } */) return;
if (ch !== 44 /* , */) {
pos = revertPos;
return;
}
}
}
// --- Extracted from AcornJS ---
// (https://github.com/acornjs/acorn/blob/master/acorn/src/identifier.js#L23
//
// MIT License
// Copyright (C) 2012-2018 by various contributors (see AUTHORS)
// 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.
// ## Character categories
// Big ugly regular expressions that match characters in the
// whitespace, identifier, and identifier-start categories. These
// are only applied when a character is found to actually have a
// code point above 128.
// Generated by `bin/generate-identifier-regex.js`.
/** @type {string | undefined} */
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\u08a0-\u08b4\u08b6-\u08c7\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\u0c60\u0c61\u0c80\u0c85-\u0c8c\u0c8e-\u0c90\u0c92-\u0ca8\u0caa-\u0cb3\u0cb5-\u0cb9\u0cbd\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-\u170c\u170e-\u1711\u1720-\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-\u1b4b\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-\u2c2e\u2c30-\u2c5e\u2c60-\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-\u9ffc\ua000-\ua48c\ua4d0-\ua4fd\ua500-\ua60c\ua610-\ua61f\ua62a\ua62b\ua640-\ua66e\ua67f-\ua69d\ua6a0-\ua6ef\ua717-\ua71f\ua722-\ua788\ua78b-\ua7bf\ua7c2-\ua7ca\ua7f5-\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';
/** @type {string | undefined} */
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\u08d3-\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\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-\u1714\u1732-\u1734\u1752\u1753\u1772\u1773\u17b4-\u17d3\u17dd\u17e0-\u17e9\u180b-\u180d\u1810-\u1819\u18a9\u1920-\u192b\u1930-\u193b\u1946-\u194f\u19d0-\u19da\u1a17-\u1a1b\u1a55-\u1a5e\u1a60-\u1a7c\u1a7f-\u1a89\u1a90-\u1a99\u1ab0-\u1abd\u1abf\u1ac0\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-\u1df9\u1dfb-\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}]`,
);
// Release intermediate regular expression strings.
nonASCIIidentifierStartChars = undefined;
nonASCIIidentifierChars = undefined;
// These are a run-length and offset encoded representation of the
// >0xffff code points that are a valid part of identifiers. The
// offset starts at 0x10000, and each pair of numbers represents an
// offset to the next range, and then a size of the range. They were
// generated by bin/generate-identifier-regex.js
// eslint-disable-next-line comma-spacing
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, 157, 310, 10, 21, 11, 7, 153, 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, 107, 20, 28, 22, 13,
52, 76, 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, 230, 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, 35, 56, 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, 2749, 1070, 4050, 582, 8634, 568, 8, 30, 114, 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, 8952, 286, 50, 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, 2357, 44, 11, 6, 17, 0, 370, 43, 1301,
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,
42717, 35, 4148, 12, 221, 3, 5761, 15, 7472, 3104, 541, 1507, 4938,
];
// eslint-disable-next-line comma-spacing
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, 176, 2, 54, 14, 32, 9, 16, 3, 46, 10, 54, 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, 135, 4, 60, 6, 26, 9, 1014, 0, 2, 54, 8, 3, 82, 0, 12, 1, 19628, 1,
5319, 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, 419, 13,
1495, 6, 110, 6, 6, 9, 4759, 9, 787719, 239,
];
// This has a complexity linear to the value of the code. The
// assumption is that looking up astral identifier characters is
// rare.
/**
* @param {number} code
* @param {Array<number>} set
*/
function isInAstralSet(code, set) {
let pos = 0x10000;
for (let i = 0; i < set.length; i += 2) {
pos += set[i];
if (pos > code) return false;
pos += set[i + 1];
if (pos >= code) return true;
}
return false;
}
// Test whether a given character code starts an identifier.
/**
* @param {number} code
* @param {boolean} astral
*/
function isIdentifierStart(code, astral) {
if (code < 65) return code === 36;
if (code < 91) return true;
if (code < 97) return code === 95;
if (code < 123) return true;
if (code <= 0xffff)
return (
code >= 0xaa && nonASCIIidentifierStart.test(String.fromCharCode(code))
);
if (astral === false) return false;
return isInAstralSet(code, astralIdentifierStartCodes);
}
// Test whether a given character is part of an identifier.
/**
* @param {number} code
* @param {boolean} astral
*/
function isIdentifierChar(code, astral) {
if (code < 48) return code === 36;
if (code < 58) return true;
if (code < 65) return false;
if (code < 91) return true;
if (code < 97) return code === 95;
if (code < 123) return true;
if (code <= 0xffff)
return code >= 0xaa && nonASCIIidentifier.test(String.fromCharCode(code));
if (astral === false) return false;
return (
isInAstralSet(code, astralIdentifierStartCodes) ||
isInAstralSet(code, astralIdentifierCodes)
);
}
function identifier() {
let ch = source.codePointAt(pos);
if (!isIdentifierStart(ch, true) || ch === '\\') return false;
pos += codePointLen(ch);
for (;;) {
ch = source.codePointAt(pos);
if (ch === 0) {
break;
}
if (isIdentifierChar(ch, true)) {
pos += codePointLen(ch);
} else if (ch === '\\') {
// no identifier escapes support for now
return false;
} else {
break;
}
}
return true;
}
/**
* @param {number} ch
*/
function codePointLen(ch) {
if (ch < 0x10000) return 1;
return 2;
}
/**
* @param {number} bPos
*/
function codePointAtLast(bPos) {
// Gives the UTF char for backtracking surrogates
const ch = source.charCodeAt(bPos);
if ((ch & 0xfc00) === 0xdc00)
return (
(((source.charCodeAt(bPos - 1) & 0x3ff) << 10) | (ch & 0x3ff)) + 0x10000
);
return ch;
}
function throwIfImportStatement() {
const startPos = pos;
pos += 6;
const ch = commentWhitespace();
switch (ch) {
// dynamic import
case 40 /* ( */:
openTokenPosStack[openTokenDepth++] = startPos;
return;
// import.meta
case 46 /* . */:
throw Error('Unexpected impo