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Editing: lexer.js
let source, pos, end; let openTokenDepth, templateDepth, lastTokenPos, lastSlashWasDivision, templateStack, templateStackDepth, openTokenPosStack, openClassPosStack, nextBraceIsClass, starExportMap, lastStarExportSpecifier, _exports, unsafeGetters, reexports; 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; _exports = new Set(); unsafeGetters = new Set(); reexports = new Set(); } // RequireType const Import = 0; const ExportAssign = 1; const ExportStar = 2; function parseCJS (source, name = '@') { resetState(); try { parseSource(source); } catch (e) { e.message += `\n at ${name}:${source.slice(0, pos).split('\n').length}:${pos - source.lastIndexOf('\n', pos - 1)}`; e.loc = pos; throw e; } const result = { exports: [..._exports].filter(expt => expt !== undefined && !unsafeGetters.has(expt)), reexports: [...reexports].filter(reexpt => reexpt !== undefined) }; resetState(); return result; } function decode (str) { if (str[0] === '"' || str[0] === '\'') { try { const decoded = (0, eval)(str); // Filter to exclude non-matching UTF-16 surrogate strings for (let i = 0; i < decoded.length; i++) { const surrogatePrefix = decoded.charCodeAt(i) & 0xFC00; if (surrogatePrefix < 0xD800) { // Not a surrogate continue; } else if (surrogatePrefix === 0xD800) { // Validate surrogate pair if ((decoded.charCodeAt(++i) & 0xFC00) !== 0xDC00) return; } else { // Out-of-range surrogate code (above 0xD800) return; } } return decoded; } catch {} } else { return str; } } 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 true; 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 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)) tryParseModuleExportsDotAssign(); 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 new Error('Unexpected closing bracket.'); openTokenDepth--; break; case 123/*{*/: openClassPosStack[openTokenDepth] = nextBraceIsClass; nextBraceIsClass = false; openTokenPosStack[openTokenDepth++] = lastTokenPos; break; case 125/*}*/: if (openTokenDepth === 0) throw new Error('Unexpected closing brace.'); if (openTokenDepth-- === templateDepth) { templateDepth = templateStack[--templateStackDepth]; templateString(); } else { if (templateDepth !== -1 && openTokenDepth < templateDepth) throw new Error('Unexpected closing brace.'); } break; case 60/*>*/: // TODO: <!-- XML comment support break; case 39/*'*/: case 34/*"*/: stringLiteral(ch); break; case 47/*/*/: { const next_ch = source.charCodeAt(pos + 1); if (next_ch === 47/*/*/) { lineComment(); // dont update lastToken continue; } else if (next_ch === 42/***/) { blockComment(); // dont 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 new Error('Unterminated template.'); if (openTokenDepth) throw new Error('Unterminated braces.'); } 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 id_end = bPos; let identifierStart = false; while ((codePoint = codePointAtLast(bPos)) && bPos >= 0) { 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, id_end + 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 `)` function tryParseObjectHasOwnProperty (it_id) { 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(it_id, pos)) return false; pos += it_id.length; ch = commentWhitespace(); if (ch !== 41/*)*/) return false; pos++; return true; } 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; while (true) { 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 exportPos = pos; stringLiteral(ch); expt = source.slice(exportPos, ++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; _exports.add(decode(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; let 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/*'*/ || ch === 34/*"*/) stringLiteral(ch); 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; _exports.add(decode(expt)); return; } break; } if (expt) { unsafeGetters.add(decode(expt)); } } else if (keys && ch === 107/*k*/ && source.startsWith('eys', pos + 1)) { while (true) { pos += 4; revertPos = pos - 1; ch = commentWhitespace(); if (ch !== 40/*(*/) break; pos++; ch = commentWhitespace(); const id_start = pos; if (!identifier()) break; const id = source.slice(id_start, 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 it_id_start = pos; if (!identifier()) break; const it_id = source.slice(it_id_start, 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(it_id, pos)) break; pos += it_id.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 + it_id.length) !== it_id) break; pos += it_id.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(it_id)) { 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(it_id, pos)) break; pos += it_id.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(it_id, pos)) break; pos += it_id.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(it_id, pos)) break; pos += it_id.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 (ch === 79/*O*/ && source.startsWith('bject', pos + 1) && source[pos + 6] === '.') { if (!tryParseObjectHasOwnProperty(it_id)) break; } else if (identifier()) { 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(it_id, pos)) break; pos += it_id.length; ch = commentWhitespace(); if (ch !== 41/*)*/) break; pos += 1; } else 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 + it_id.length) !== it_id) break; pos += it_id.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 + it_id.length) !== it_id) break; pos += it_id.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(it_id, pos)) break; pos += it_id.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; let 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(it_id, pos)) break; pos += it_id.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(decode(starExportSpecifier)); pos = revertPos; return; } return; } } } pos = revertPos; } 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 tryParseModuleExportsDotAssign () { 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; } 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/*=*/) { _exports.add(decode(source.slice(startPos, endPos))); return; } } break; } // exports['asdf'] case 91/*[*/: { pos++; ch = commentWhitespace(); if (ch === 39/*'*/ || ch === 34/*"*/) { const startPos = pos; stringLiteral(ch); const endPos = ++pos; ch = commentWhitespace(); if (ch !== 93/*]*/) break; pos++; ch = commentWhitespace(); if (ch !== 61/*=*/) break; _exports.add(decode(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*/) tryParseRequire(ExportAssign); } } } pos = revertPos; } 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; if (ch === 39/*'*/ || ch === 34/*"*/) { stringLiteral(ch); const reexportEnd = ++pos; ch = commentWhitespace(); if (ch === 41/*)*/) { switch (requireType) { case ExportAssign: reexports.add(decode(source.slice(reexportStart, reexportEnd))); return true; case ExportStar: reexports.add(decode(source.slice(reexportStart, reexportEnd))); return true; default: lastStarExportSpecifier = decode(source.slice(reexportStart, reexportEnd)); return true; } } } } pos = revertPos; } return false; } function tryParseLiteralExports () { const revertPos = pos - 1; while (pos++ < end) { let ch = commentWhitespace(); const 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); } _exports.add(decode(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/*"*/) { const startPos = pos; stringLiteral(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); _exports.add(decode(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`. 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" 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 + "]") nonASCIIidentifierStartChars = nonASCIIidentifierChars = null // 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. 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 } } // Test whether a given character code starts an identifier. 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. 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); while (ch = source.codePointAt(pos)) { if (isIdentifierChar(ch, true)) { pos += codePointLen(ch); } else if (ch === '\\') { // no identifier escapes support for now return false; } else { break; } } return true; } function codePointLen (ch) { if (ch < 0x10000) return 1; return 2; } 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 new Error('Unexpected import.meta in CJS module.'); default: // no space after "import" -> not an import keyword if (pos === startPos + 6) break; case 34/*"*/: case 39/*'*/: case 123/*{*/: case 42/***/: // import statement only permitted at base-level if (openTokenDepth !== 0) { pos--; return; } // import statements are a syntax error in CommonJS throw new Error('Unexpected import statement in CJS module.'); } } function throwIfExportStatement () { pos += 6; const curPos = pos; const ch = commentWhitespace(); if (pos === curPos && !isPunctuator(ch)) return; throw new Error('Unexpected export statement in CJS module.'); } function commentWhitespace () { let ch; do { ch = source.charCodeAt(pos); if (ch === 47/*/*/) { const next_ch = source.charCodeAt(pos + 1); if (next_ch === 47/*/*/) lineComment(); else if (next_ch === 42/***/) blockComment(); else return ch; } else if (!isBrOrWs(ch)) { return ch; } } while (pos++ < end); return ch; } function templateString () { while (pos++ < end) { const ch = source.charCodeAt(pos); if (ch === 36/*$*/ && source.charCodeAt(pos + 1) === 123/*{*/) { pos++; templateStack[templateStackDepth++] = templateDepth; templateDepth = ++openTokenDepth; return; } if (ch === 96/*`*/) return; if (ch === 92/*\*/) pos++; } syntaxError(); } function blockComment () { pos++; while (pos++ < end) { const ch = source.charCodeAt(pos); if (ch === 42/***/ && source.charCodeAt(pos + 1) === 47/*/*/) { pos++; return; } } } function lineComment () { while (pos++ < end) { const ch = source.charCodeAt(pos); if (ch === 10/*\n*/ || ch === 13/*\r*/) return; } } function stringLiteral (quote) { while (pos++ < end) { let ch = source.charCodeAt(pos); if (ch === quote) return; if (ch === 92/*\*/) { ch = source.charCodeAt(++pos); if (ch === 13/*\r*/ && source.charCodeAt(pos + 1) === 10/*\n*/) pos++; } else if (isBr(ch)) break; } throw new Error('Unterminated string.'); } function regexCharacterClass () { while (pos++ < end) { let ch = source.charCodeAt(pos); if (ch === 93/*]*/) return ch; if (ch === 92/*\*/) pos++; else if (ch === 10/*\n*/ || ch === 13/*\r*/) break; } throw new Error('Syntax error reading regular expression class.'); } function regularExpression () { while (pos++ < end) { let ch = source.charCodeAt(pos); if (ch === 47/*/*/) return; if (ch === 91/*[*/) ch = regexCharacterClass(); else if (ch === 92/*\*/) pos++; else if (ch === 10/*\n*/ || ch === 13/*\r*/) break; } throw new Error('Syntax error reading regular expression.'); } // Note: non-asii BR and whitespace checks omitted for perf / footprint // if there is a significant user need this can be reconsidered function isBr (c) { return c === 13/*\r*/ || c === 10/*\n*/; } function isBrOrWs (c) { return c > 8 && c < 14 || c === 32 || c === 160; } function isBrOrWsOrPunctuatorNotDot (c) { return c > 8 && c < 14 || c === 32 || c === 160 || isPunctuator(c) && c !== 46/*.*/; } function keywordStart (pos) { return pos === 0 || isBrOrWsOrPunctuatorNotDot(source.charCodeAt(pos - 1)); } function readPrecedingKeyword (pos, match) { if (pos < match.length - 1) return false; return source.startsWith(match, pos - match.length + 1) && (pos === 0 || isBrOrWsOrPunctuatorNotDot(source.charCodeAt(pos - match.length))); } function readPrecedingKeyword1 (pos, ch) { return source.charCodeAt(pos) === ch && (pos === 0 || isBrOrWsOrPunctuatorNotDot(source.charCodeAt(pos - 1))); } // Detects one of case, debugger, delete, do, else, in, instanceof, new, // return, throw, typeof, void, yield, await function isExpressionKeyword (pos) { switch (source.charCodeAt(pos)) { case 100/*d*/: switch (source.charCodeAt(pos - 1)) { case 105/*i*/: // void return readPrecedingKeyword(pos - 2, 'vo'); case 108/*l*/: // yield return readPrecedingKeyword(pos - 2, 'yie'); default: return false; } case 101/*e*/: switch (source.charCodeAt(pos - 1)) { case 115/*s*/: switch (source.charCodeAt(pos - 2)) { case 108/*l*/: // else return readPrecedingKeyword1(pos - 3, 101/*e*/); case 97/*a*/: // case return readPrecedingKeyword1(pos - 3, 99/*c*/); default: return false; } case 116/*t*/: // delete return readPrecedingKeyword(pos - 2, 'dele'); default: return false; } case 102/*f*/: if (source.charCodeAt(pos - 1) !== 111/*o*/ || source.charCodeAt(pos - 2) !== 101/*e*/) return false; switch (source.charCodeAt(pos - 3)) { case 99/*c*/: // instanceof return readPrecedingKeyword(pos - 4, 'instan'); case 112/*p*/: // typeof return readPrecedingKeyword(pos - 4, 'ty'); default: return false; } case 110/*n*/: // in, return return readPrecedingKeyword1(pos - 1, 105/*i*/) || readPrecedingKeyword(pos - 1, 'retur'); case 111/*o*/: // do return readPrecedingKeyword1(pos - 1, 100/*d*/); case 114/*r*/: // debugger return readPrecedingKeyword(pos - 1, 'debugge'); case 116/*t*/: // await return readPrecedingKeyword(pos - 1, 'awai'); case 119/*w*/: switch (source.charCodeAt(pos - 1)) { case 101/*e*/: // new return readPrecedingKeyword1(pos - 2, 110/*n*/); case 111/*o*/: // throw return readPrecedingKeyword(pos - 2, 'thr'); default: return false; } } return false; } function isParenKeyword (curPos) { return source.charCodeAt(curPos) === 101/*e*/ && source.startsWith('whil', curPos - 4) || source.charCodeAt(curPos) === 114/*r*/ && source.startsWith('fo', curPos - 2) || source.charCodeAt(curPos - 1) === 105/*i*/ && source.charCodeAt(curPos) === 102/*f*/; } function isPunctuator (ch) { // 23 possible punctuator endings: !%&()*+,-./:;<=>?[]^{}|~ return ch === 33/*!*/ || ch === 37/*%*/ || ch === 38/*&*/ || ch > 39 && ch < 48 || ch > 57 && ch < 64 || ch === 91/*[*/ || ch === 93/*]*/ || ch === 94/*^*/ || ch > 122 && ch < 127; } function isExpressionPunctuator (ch) { // 20 possible expression endings: !%&(*+,-.:;<=>?[^{|~ return ch === 33/*!*/ || ch === 37/*%*/ || ch === 38/*&*/ || ch > 39 && ch < 47 && ch !== 41 || ch > 57 && ch < 64 || ch === 91/*[*/ || ch === 94/*^*/ || ch > 122 && ch < 127 && ch !== 125/*}*/; } function isExpressionTerminator (curPos) { // detects: // => ; ) finally catch else // as all of these followed by a { will indicate a statement brace switch (source.charCodeAt(curPos)) { case 62/*>*/: return source.charCodeAt(curPos - 1) === 61/*=*/; case 59/*;*/: case 41/*)*/: return true; case 104/*h*/: return source.startsWith('catc', curPos - 4); case 121/*y*/: return source.startsWith('finall', curPos - 6); case 101/*e*/: return source.startsWith('els', curPos - 3); } return false; } const initPromise = Promise.resolve(); module.exports.init = () => initPromise; module.exports.parse = parseCJS;
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