Index: frontend/node_modules/regjsparser/LICENSE.BSD =================================================================== --- frontend/node_modules/regjsparser/LICENSE.BSD (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/regjsparser/LICENSE.BSD (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,21 @@ +Copyright (c) Julian Viereck and Contributors, 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. + +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 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. Index: frontend/node_modules/regjsparser/README.md =================================================================== --- frontend/node_modules/regjsparser/README.md (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/regjsparser/README.md (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,47 @@ +# RegJSParser + +Parsing the JavaScript's RegExp in JavaScript. + +## Installation + +```bash +npm install regjsparser +``` + +## Usage + +```js +var parse = require('regjsparser').parse; + +var parseTree = parse('^a'); // /^a/ +console.log(parseTree); + +// Toggle on/off additional features: +var parseTree = parse('^a', '', { + // SEE: https://github.com/jviereck/regjsparser/pull/78 + unicodePropertyEscape: true, + + // SEE: https://github.com/jviereck/regjsparser/pull/83 + namedGroups: true, + + // SEE: https://github.com/jviereck/regjsparser/pull/89 + lookbehind: true +}); +console.log(parseTree); +``` + +## Testing + +To run the tests, run the following command: + +```bash +npm test +``` + +To create a new reference file, execute… + +```bash +node test/update-fixtures.js +``` + +…from the repo top directory. Index: frontend/node_modules/regjsparser/bin/parser =================================================================== --- frontend/node_modules/regjsparser/bin/parser (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/regjsparser/bin/parser (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,63 @@ +#!/usr/bin/env node +(function() { + + var fs = require('fs'); + var path = require('path'); + var parse = require('../parser').parse; + var jsesc = require('jsesc'); + var regexes = process.argv.splice(2); + var first = regexes[0]; + var data; + var log = console.log; + var flags = ''; + var main = function() { + if (/^(?:-h|--help|undefined)$/.test(first)) { + log([ + '\nUsage:\n', + '\tregjsparser [regex ...]', + '\tregjsparser [-f | --flags] u [regex ...]', + '\tregjsparser [-v | --version]', + '\tregjsparser [-h | --help]', + '\nExamples:\n', + '\tregjsparser \'^foo.bar$\'', + '\tregjsparser \'[a-zA-Z0-9]\'' + ].join('\n')); + return process.exit(1); + } + + if (/^(?:-v|--version)$/.test(first)) { + log('v%s', require(path.resolve(__dirname, '../package.json')).version); + return process.exit(1); + } + + if (/^(?:-f|--flags)$/.test(first)) { + flags = regexes[1]; + regexes = regexes.slice(2); + } + + regexes.forEach(function(snippet) { + try { + result = parse(snippet, flags); + log(jsesc(result, { + 'json': true, + 'compact': false, + 'indent': '\t' + })); + } catch(error) { + log(error.message + '\n'); + log('Error: failed to parse. Make sure the regular expression is valid.'); + log('If you think this is a bug in regjsparser, please report it:'); + log('\thttps://github.com/jviereck/regjsparser/issues/new'); + log('\nStack trace:\n'); + log(error.stack); + return process.exit(1); + } + }); + // Return with exit status 0 outside of the `forEach` loop, in case + // multiple regular expressions were passed in. + return process.exit(0); + }; + + main(); + +}()); Index: frontend/node_modules/regjsparser/package.json =================================================================== --- frontend/node_modules/regjsparser/package.json (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/regjsparser/package.json (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,47 @@ +{ + "name": "regjsparser", + "version": "0.13.1", + "author": "'Julian Viereck' ", + "license": "BSD-2-Clause", + "main": "./parser", + "types": "./parser.d.ts", + "bin": { + "regjsparser": "bin/parser" + }, + "homepage": "https://github.com/jviereck/regjsparser", + "repository": { + "type": "git", + "url": "git+ssh://git@github.com/jviereck/regjsparser.git" + }, + "scripts": { + "lint": "eslint --max-warnings 0 .", + "test": "run-p test:* lint", + "test:src": "node test/index.js", + "test:types": "tsc test/types.ts --noEmit", + "bench:baseline": "node ./tools/bench/index.mjs baseline", + "bench:current": "node ./tools/bench/index.mjs current", + "bench": "run-s bench:*" + }, + "files": [ + "bin/", + "LICENSE.BSD", + "parser.js", + "parser.d.ts", + "README.md" + ], + "dependencies": { + "jsesc": "~3.1.0" + }, + "devDependencies": { + "@eslint/js": "^10.0.1", + "@unicode/unicode-17.0.0": "^1.6.12", + "eslint": "^10.0.2", + "eslint-plugin-regexp": "^3.0.0", + "globals": "^17.3.0", + "npm-run-all": "^4.1.5", + "regenerate": "^1.4.2", + "regjsparser": "^0.11.2", + "tinybench": "^5.0.1", + "typescript": "~5.9.2" + } +} Index: frontend/node_modules/regjsparser/parser.d.ts =================================================================== --- frontend/node_modules/regjsparser/parser.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/regjsparser/parser.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,182 @@ +type _If = Test extends true ? Then : Else; + +export type Features = { + lookbehind?: boolean; + namedGroups?: boolean; + unicodePropertyEscape?: boolean; + unicodeSet?: boolean; + modifiers?: boolean; +}; + +export type AstNodeType = + | "alternative" + | "anchor" + | "characterClass" + | "characterClassEscape" + | "characterClassRange" + | "disjunction" + | "dot" + | "group" + | "quantifier" + | "reference" + | "unicodePropertyEscape" + | "value"; + +export type Base = { + range: [number, number]; + raw: string; + type: T; +}; + +export type AstNode = + | Alternative + | Anchor + | CharacterClass + | CharacterClassEscape + | CharacterClassRange + | Disjunction + | Dot + | Group + | Quantifier + | Reference + | _If + | Value; + +export type RootNode = Exclude< + AstNode, + CharacterClassRange +>; + +export type Anchor = Base<"anchor"> & { + kind: "boundary" | "end" | "not-boundary" | "start"; +}; + +export type CharacterClassEscape = Base<"characterClassEscape"> & { + value: 'd' | 'D' | 'w' | 'W' | 's' | 'S'; +}; + +export type Value = Base<"value"> & { + codePoint: number; + kind: + | "controlLetter" + | "hexadecimalEscape" + | "identifier" + | "null" + | "octal" + | "singleEscape" + | "symbol" + | "unicodeCodePointEscape" + | "unicodeEscape"; +}; + +export type Identifier = Base<"value"> & { + value: string; +}; + +export type Alternative = Base<"alternative"> & { + body: RootNode[]; +}; + +export type CharacterClassRange = Base<"characterClassRange"> & { + max: Value; + min: Value; +}; + +export type UnicodePropertyEscape = Base<"unicodePropertyEscape"> & { + negative: boolean; + value: string; +}; + +export type CharacterClassBody = + | CharacterClassEscape + | CharacterClassRange + | UnicodePropertyEscape + | Value; + +export type CharacterClass = Base<"characterClass"> & { + body: CharacterClassBody[]; + negative: boolean; + kind: "union" | _If; +}; + +export type ModifierFlags = { + enabling: string; + disabling: string; +}; + +export type NonCapturingGroup = Base<"group"> & + ( + | { + behavior: + | "lookahead" + | "lookbehind" + | "negativeLookahead" + | "negativeLookbehind"; + body: RootNode[]; + } + | ({ + behavior: "ignore"; + body: RootNode[]; + } & _If< + F["modifiers"], + { + modifierFlags?: ModifierFlags; + }, + { + modifierFlags: undefined; + } + >) + ); + +export type CapturingGroup = Base<"group"> & { + behavior: "normal"; + body: RootNode[]; +} & _If< + F["namedGroups"], + { + name?: Identifier; + }, + { + name: undefined; + } + >; + +export type Group = + | CapturingGroup + | NonCapturingGroup; + +export type Quantifier = Base<"quantifier"> & { + body: [RootNode]; + greedy: boolean; + max?: number; + min: number; + symbol?: "?" | "*" | "+"; +}; + +export type Disjunction = Base<"disjunction"> & { + body: [RootNode, RootNode, ...RootNode[]]; +}; + +export type Dot = Base<"dot">; + +export type NamedReference = Base<"reference"> & { + matchIndex: undefined; + name: Identifier; +}; + +export type IndexReference = Base<"reference"> & { + matchIndex: number; + name: undefined; +}; + +export type Reference = _If< + F["namedGroups"], + IndexReference | NamedReference, + IndexReference +>; + +export function parse( + str: string, + flags: string, + features?: F +): RootNode; Index: frontend/node_modules/regjsparser/parser.js =================================================================== --- frontend/node_modules/regjsparser/parser.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/regjsparser/parser.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,1823 @@ +// regjsparser +// +// ================================================================== +// +// See ECMA-262 Standard: 15.10.1 +// +// NOTE: The ECMA-262 standard uses the term "Assertion" for /^/. Here the +// term "Anchor" is used. +// +// Pattern :: +// Disjunction +// +// Disjunction :: +// Alternative +// Alternative | Disjunction +// +// Alternative :: +// [empty] +// Alternative Term +// +// Term :: +// Anchor +// Anchor Quantifier (see https://github.com/jviereck/regjsparser/issues/130) +// Atom +// Atom Quantifier +// +// Anchor :: +// ^ +// $ +// \ b +// \ B +// ( ? = Disjunction ) +// ( ? ! Disjunction ) +// ( ? < = Disjunction ) +// ( ? < ! Disjunction ) +// +// Quantifier :: +// QuantifierPrefix +// QuantifierPrefix ? +// +// QuantifierPrefix :: +// * +// + +// ? +// { DecimalDigits } +// { DecimalDigits , } +// { DecimalDigits , DecimalDigits } +// +// Atom :: +// PatternCharacter +// . +// \ AtomEscape +// CharacterClass +// ( GroupSpecifier Disjunction ) +// ( ? : Disjunction ) +// +// PatternCharacter :: +// SourceCharacter but not any of: ^ $ \ . * + ? ( ) [ ] { } | +// +// AtomEscape :: +// DecimalEscape +// CharacterClassEscape +// CharacterEscape +// k GroupName +// +// CharacterEscape[U] :: +// ControlEscape +// c ControlLetter +// HexEscapeSequence +// RegExpUnicodeEscapeSequence[?U] (ES6) +// IdentityEscape[?U] +// +// ControlEscape :: +// one of f n r t v +// ControlLetter :: +// one of +// a b c d e f g h i j k l m n o p q r s t u v w x y z +// A B C D E F G H I J K L M N O P Q R S T U V W X Y Z +// +// IdentityEscape :: +// SourceCharacter but not c +// +// DecimalEscape :: +// DecimalIntegerLiteral [lookahead ∉ DecimalDigit] +// +// CharacterClassEscape :: +// one of d D s S w W +// +// CharacterClass :: +// [ [lookahead ∉ {^}] ClassContents ] +// [ ^ ClassContents ] +// +// ClassContents :: +// [empty] +// [~V] NonemptyClassRanges +// [+V] ClassSetExpression +// +// NonemptyClassRanges :: +// ClassAtom +// ClassAtom NonemptyClassRangesNoDash +// ClassAtom - ClassAtom ClassContents +// +// NonemptyClassRangesNoDash :: +// ClassAtom +// ClassAtomNoDash NonemptyClassRangesNoDash +// ClassAtomNoDash - ClassAtom ClassContents +// +// ClassAtom :: +// - +// ClassAtomNoDash +// +// ClassAtomNoDash :: +// SourceCharacter but not one of \ or ] or - +// \ ClassEscape +// +// ClassEscape :: +// DecimalEscape +// b +// CharacterEscape +// CharacterClassEscape +// +// GroupSpecifier :: +// [empty] +// ? GroupName +// +// GroupName :: +// < RegExpIdentifierName > +// +// RegExpIdentifierName :: +// RegExpIdentifierStart +// RegExpIdentifierName RegExpIdentifierContinue +// +// RegExpIdentifierStart :: +// UnicodeIDStart +// $ +// _ +// \ RegExpUnicodeEscapeSequence +// +// RegExpIdentifierContinue :: +// UnicodeIDContinue +// $ +// _ +// \ RegExpUnicodeEscapeSequence +// +// +// +// -------------------------------------------------------------- +// NOTE: The following productions refer to the "set notation and +// properties of strings" proposal. +// https://github.com/tc39/proposal-regexp-set-notation +// -------------------------------------------------------------- +// +// ClassSetExpression :: +// ClassUnion +// ClassIntersection +// ClassSubtraction +// +// ClassUnion :: +// ClassSetRange ClassUnion? +// ClassSetOperand ClassUnion? +// +// ClassIntersection :: +// ClassSetOperand && [lookahead ≠ &] ClassSetOperand +// ClassIntersection && [lookahead ≠ &] ClassSetOperand +// +// ClassSubtraction :: +// ClassSetOperand -- ClassSetOperand +// ClassSubtraction -- ClassSetOperand +// +// ClassSetRange :: +// ClassSetCharacter - ClassSetCharacter +// +// ClassSetOperand :: +// ClassSetCharacter +// ClassStringDisjunction +// NestedClass +// +// NestedClass :: +// [ [lookahead ≠ ^] ClassContents[+U,+V] ] +// [ ^ ClassContents[+U,+V] ] +// \ CharacterClassEscape[+U, +V] +// +// ClassStringDisjunction :: +// \q{ ClassStringDisjunctionContents } +// +// ClassStringDisjunctionContents :: +// ClassString +// ClassString | ClassStringDisjunctionContents +// +// ClassString :: +// [empty] +// NonEmptyClassString +// +// NonEmptyClassString :: +// ClassSetCharacter NonEmptyClassString? +// +// ClassSetCharacter :: +// [lookahead ∉ ClassSetReservedDoublePunctuator] SourceCharacter but not ClassSetSyntaxCharacter +// \ CharacterEscape[+U] +// \ ClassSetReservedPunctuator +// \b +// +// ClassSetReservedDoublePunctuator :: +// one of && !! ## $$ %% ** ++ ,, .. :: ;; << == >> ?? @@ ^^ `` ~~ +// +// ClassSetSyntaxCharacter :: +// one of ( ) [ ] { } / - \ | +// +// ClassSetReservedPunctuator :: +// one of & - ! # % , : ; < = > @ ` ~ +// +// -------------------------------------------------------------- +// NOTE: The following productions refer to the +// "Regular Expression Pattern Modifiers for ECMAScript" proposal. +// https://github.com/tc39/proposal-regexp-modifiers +// -------------------------------------------------------------- +// +// Atom :: +// ( ? RegularExpressionModifiers : Disjunction ) +// ( ? RegularExpressionModifiers - RegularExpressionModifiers : Disjunction ) +// +// RegularExpressionModifiers: +// [empty] +// RegularExpressionModifiers RegularExpressionModifier +// +// RegularExpressionModifier: +// one of i m s + +"use strict"; +(function() { + + var fromCodePoint = String.fromCodePoint || (function() { + // Implementation taken from + // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/fromCodePoint + + var stringFromCharCode = String.fromCharCode; + var floor = Math.floor; + + return function fromCodePoint() { + var MAX_SIZE = 0x4000; + var codeUnits = []; + var highSurrogate; + var lowSurrogate; + var index = -1; + var length = arguments.length; + if (!length) { + return ''; + } + var result = ''; + while (++index < length) { + var codePoint = Number(arguments[index]); + if ( + !isFinite(codePoint) || // `NaN`, `+Infinity`, or `-Infinity` + codePoint < 0 || // not a valid Unicode code point + codePoint > 0x10FFFF || // not a valid Unicode code point + floor(codePoint) != codePoint // not an integer + ) { + throw RangeError('Invalid code point: ' + codePoint); + } + if (codePoint <= 0xFFFF) { // BMP code point + codeUnits.push(codePoint); + } else { // Astral code point; split in surrogate halves + // http://mathiasbynens.be/notes/javascript-encoding#surrogate-formulae + codePoint -= 0x10000; + highSurrogate = (codePoint >> 10) + 0xD800; + lowSurrogate = (codePoint % 0x400) + 0xDC00; + codeUnits.push(highSurrogate, lowSurrogate); + } + if (index + 1 == length || codeUnits.length > MAX_SIZE) { + result += stringFromCharCode.apply(null, codeUnits); + codeUnits.length = 0; + } + } + return result; + }; + }()); + + function parse(str, flags, features) { + if (!features) { + features = {}; + } + + function updateRawStart(node, start) { + node.range[0] = start; + node.raw = str.substring(start, node.range[1]); + return node; + } + + function createAnchor(kind, rawLength) { + return { + type: 'anchor', + kind: kind, + range: [ + pos - rawLength, + pos + ], + raw: str.substring(pos - rawLength, pos) + }; + } + + function createValue(kind, codePoint, from, to) { + return { + type: 'value', + kind: kind, + codePoint: codePoint, + range: [from, to], + raw: str.substring(from, to) + }; + } + + function createEscaped(kind, codePoint, value, fromOffset) { + fromOffset = fromOffset || 0; + return createValue(kind, codePoint, pos - (value.length + fromOffset), pos); + } + + function createCharacter(matches) { + var _char = matches[0]; + var first = _char.charCodeAt(0); + if (isUnicodeMode) { + var second; + if (_char.length === 1 && first >= 0xD800 && first <= 0xDBFF) { + second = lookahead().charCodeAt(0); + if (second >= 0xDC00 && second <= 0xDFFF) { + // Unicode surrogate pair + pos++; + return createValue( + 'symbol', + (first - 0xD800) * 0x400 + second - 0xDC00 + 0x10000, + pos - 2, pos); + } + } + } + return createValue('symbol', first, pos - 1, pos); + } + + function createDisjunction(alternatives, from, to) { + return { + type: 'disjunction', + body: alternatives, + range: [ + from, + to + ], + raw: str.substring(from, to) + }; + } + + function createDot() { + return { + type: 'dot', + range: [ + pos - 1, + pos + ], + raw: '.' + }; + } + + function createCharacterClassEscape(value) { + return { + type: 'characterClassEscape', + value: value, + range: [ + pos - 2, + pos + ], + raw: str.substring(pos - 2, pos) + }; + } + + function createReference(matchIndex) { + var start = pos - 1 - matchIndex.length; + return { + type: 'reference', + matchIndex: parseInt(matchIndex, 10), + range: [ + start, + pos + ], + raw: str.substring(start, pos) + }; + } + + function createNamedReference(name) { + var start = name.range[0] - 3; + return { + type: 'reference', + name: name, + range: [ + start, + pos + ], + raw: str.substring(start, pos) + }; + } + + function createGroup(behavior, disjunction, from, to) { + return { + type: 'group', + behavior: behavior, + body: disjunction, + range: [ + from, + to + ], + raw: str.substring(from, to) + }; + } + + function createQuantifier(min, max, from, to, symbol) { + if (to == null) { + from = pos - 1; + to = pos; + } + + return { + type: 'quantifier', + min: min, + max: max, + greedy: true, + body: null, // set later on + symbol: symbol, + range: [ + from, + to + ], + raw: str.substring(from, to) + }; + } + + function createAlternative(terms, from, to) { + return { + type: 'alternative', + body: terms, + range: [ + from, + to + ], + raw: str.substring(from, to) + }; + } + + function createCharacterClass(contents, negative, from, to) { + return { + type: 'characterClass', + kind: contents.kind, + body: contents.body, + negative: negative, + range: [ + from, + to + ], + raw: str.substring(from, to) + }; + } + + function createClassRange(min, max, from, to) { + // See 15.10.2.15: + if (min.codePoint > max.codePoint) { + bail('invalid range in character class', min.raw + '-' + max.raw, from, to); + } + + return { + type: 'characterClassRange', + min: min, + max: max, + range: [ + from, + to + ], + raw: str.substring(from, to) + }; + } + + function createClassStrings(strings, from, to) { + return { + type: 'classStrings', + strings: strings, + range: [from, to], + raw: str.substring(from, to) + }; + } + + function createClassString(characters, from, to) { + return { + type: 'classString', + characters: characters, + range: [from, to], + raw: str.substring(from, to) + }; + } + + function flattenBody(body) { + if (body.type === 'alternative') { + return body.body; + } else { + return [body]; + } + } + + function incr(amount) { + amount = (amount || 1); + pos += amount; + } + + function consume(amount) { + var res = str.substring(pos, pos += amount); + return res; + } + + function skip(value) { + if (!match(value)) { + bail('character', value); + } + } + + function match(value) { + var len = value.length; + if (str.substring(pos, pos + len) === value) { + incr(len); + return value; + } + } + + function matchOne(value) { + if (str[pos] === value) { + pos++; + return value; + } + } + + function lookahead() { + return str[pos]; + } + + function currentOne(value) { + return str[pos] === value; + } + + function current(value) { + var len = value.length; + return str.substring(pos, pos + len) === value; + } + + function next(value) { + return str[pos + 1] === value; + } + + function matchReg(regExp) { + var subStr = str.substring(pos); + var res = subStr.match(regExp); + if (res) { + pos += res[0].length; + } + return res; + } + + function parseDisjunction() { + // Disjunction :: + // Alternative + // Alternative | Disjunction + var res = [], from = pos; + res.push(parseAlternative()); + + while (matchOne('|')) { + res.push(parseAlternative()); + } + + if (res.length === 1) { + return res[0]; + } + + return createDisjunction(res, from, pos); + } + + function parseAlternative() { + var res = [], from = pos; + var term; + + // Alternative :: + // [empty] + // Alternative Term + while (term = parseTerm()) { + res.push(term); + } + + if (res.length === 1) { + return res[0]; + } + + return createAlternative(res, from, pos); + } + + function parseTerm() { + // Term :: + // Anchor + // Atom + // Atom Quantifier + + // Term (Annex B):: + // [~UnicodeMode] QuantifiableAssertion Quantifier (see https://github.com/jviereck/regjsparser/issues/130) + // [~UnicodeMode] ExtendedAtom Quantifier + + // QuantifiableAssertion:: + // (?= Disjunction[~UnicodeMode, ~UnicodeSetsMode, ?NamedCaptureGroups] ) + // (?! Disjunction[~UnicodeMode, ~UnicodeSetsMode, ?NamedCaptureGroups] ) + + if (pos >= str.length || currentOne('|') || currentOne(')')) { + return null; /* Means: The term is empty */ + } + + var anchor = parseAnchor(); + var quantifier; + if (anchor) { + var pos_backup = pos; + quantifier = parseQuantifier() || false; + if (quantifier) { + // Annex B + if (!isUnicodeMode && anchor.type === "group") { + quantifier.body = flattenBody(anchor); + // The quantifier contains the anchor. Therefore, the beginning of the + // quantifier range is given by the beginning of the anchor. + updateRawStart(quantifier, anchor.range[0]); + return quantifier; + } + pos = pos_backup; + bail("Expected atom"); + } + return anchor; + } + + // If there is no Anchor, try to parse an atom. + var atom = parseAtomAndExtendedAtom(); + if (!atom) { + // Check if a quantifier is following. A quantifier without an atom + // is an error. + pos_backup = pos; + quantifier = parseQuantifier() || false; + if (quantifier) { + pos = pos_backup; + bail("Expected atom"); + } + + // If no unicode flag, then try to parse ExtendedAtom -> ExtendedPatternCharacter. + // ExtendedPatternCharacter + if (!isUnicodeMode && matchOne("{")) { + atom = createCharacter("{"); + } else { + bail("Expected atom"); + } + } + + quantifier = parseQuantifier() || false; + if (quantifier) { + var type = atom.type, behavior = atom.behavior; + if ( + type === "group" && + (behavior === "negativeLookbehind" || + behavior === "lookbehind") + ) { + bail( + "Invalid quantifier", + "", + quantifier.range[0], + quantifier.range[1] + ); + } + quantifier.body = flattenBody(atom); + // The quantifier contains the atom. Therefore, the beginning of the + // quantifier range is given by the beginning of the atom. + updateRawStart(quantifier, atom.range[0]); + return quantifier; + } + return atom; + } + + function parseGroup(matchA, typeA, matchB, typeB) { + var type, from = pos; + + if (match(matchA)) { + type = typeA; + } else if (match(matchB)) { + type = typeB; + } else { + return false; + } + + return finishGroup(type, from); + } + + function finishGroup(type, from) { + var body = parseDisjunction(); + if (!body) { + bail('Expected disjunction'); + } + skip(')'); + var group = createGroup(type, flattenBody(body), from, pos); + + if (type == 'normal') { + // Keep track of the number of closed groups. This is required for + // parseDecimalEscape(). In case the string is parsed a second time the + // value already holds the total count and no incrementation is required. + if (firstIteration) { + closedCaptureCounter++; + } + } + return group; + } + + function parseAnchor() { + // Anchor :: + // ^ + // $ + // \ b + // \ B + // ( ? = Disjunction ) + // ( ? ! Disjunction ) + + switch(lookahead()) { + case '^': + incr(); + return createAnchor('start', 1 /* rawLength */); + case '$': + incr(); + return createAnchor('end', 1 /* rawLength */); + case '\\': { + if (next('b')) { + incr(2); + return createAnchor('boundary', 2 /* rawLength */); + } else if (next('B')) { + incr(2); + return createAnchor('not-boundary', 2 /* rawLength */); + } + break; + } + case '(': + return parseGroup('(?=', 'lookahead', '(?!', 'negativeLookahead'); + default: + return; + } + } + + function parseQuantifier() { + // Quantifier :: + // QuantifierPrefix + // QuantifierPrefix ? + // + // QuantifierPrefix :: + // * + // + + // ? + // { DecimalDigits } + // { DecimalDigits , } + // { DecimalDigits , DecimalDigits } + + var res, from = pos; + var quantifier; + var min, max; + + switch(lookahead()) { + case '*': + incr(); + quantifier = createQuantifier(0, undefined, undefined, undefined, '*'); + break; + case '+': + incr(); + quantifier = createQuantifier(1, undefined, undefined, undefined, "+"); + break; + case '?': + incr(); + quantifier = createQuantifier(0, 1, undefined, undefined, "?"); + break; + case '{': { + if (res = matchReg(/^\{(\d+)\}/)) { + min = parseInt(res[1], 10); + quantifier = createQuantifier(min, min, from, pos); + } + else if (res = matchReg(/^\{(\d+),\}/)) { + min = parseInt(res[1], 10); + quantifier = createQuantifier(min, undefined, from, pos); + } + else if (res = matchReg(/^\{(\d+),(\d+)\}/)) { + min = parseInt(res[1], 10); + max = parseInt(res[2], 10); + if (min > max) { + bail('numbers out of order in {} quantifier', '', from, pos); + } + quantifier = createQuantifier(min, max, from, pos); + } + + if (min && (!Number.isSafeInteger(min)) || (max && !Number.isSafeInteger(max))) { + bail("iterations outside JS safe integer range in quantifier", "", from, pos); + } + } + } + + if (quantifier) { + if (matchOne('?')) { + quantifier.greedy = false; + quantifier.range[1] += 1; + } + } + + return quantifier; + } + + function parseAtomAndExtendedAtom() { + // Parsing Atom and ExtendedAtom together due to redundancy. + // ExtendedAtom is defined in Appendix B of the ECMA-262 standard. + // + // SEE: https://www.ecma-international.org/ecma-262/10.0/index.html#prod-annexB-ExtendedPatternCharacter + // + // Atom :: + // PatternCharacter + // . + // \ AtomEscape + // CharacterClass + // ( GroupSpecifier Disjunction ) + // ( ? RegularExpressionModifiers : Disjunction ) + // ( ? RegularExpressionModifiers - RegularExpressionModifiers : Disjunction ) + // ExtendedAtom :: + // ExtendedPatternCharacter + // ExtendedPatternCharacter :: + // SourceCharacter but not one of ^$\.*+?()[| + + var res; + + switch (res = lookahead()) { + case '.': + // . + incr(); + return createDot(); + case '\\': { + // \ AtomEscape + incr(); + res = parseAtomEscape(); + if (!res) { + if (!isUnicodeMode && lookahead() == 'c') { + // B.1.4 ExtendedAtom + // \[lookahead = c] + return createValue('symbol', 92, pos - 1, pos); + } + bail('atomEscape'); + } + return res; + } + case '[': + return parseCharacterClass(); + case '(': { + if (features.lookbehind && (res = parseGroup('(?<=', 'lookbehind', '(?"); + var group = finishGroup("normal", name.range[0] - 3); + group.name = name; + return group; + } + else if (features.modifiers && current("(?") && str[pos + 2] != ":") { + return parseModifiersGroup(); + } + else { + // ( Disjunction ) + // ( ? : Disjunction ) + return parseGroup('(?:', 'ignore', '(', 'normal'); + } + } + case ']': + case '}': + // ExtendedPatternCharacter, first part. See parseTerm. + if (!isUnicodeMode) { + incr(); + return createCharacter(res); + } + break; + case '^': + case '$': + case '*': + case '+': + case '?': + case '{': + case ')': + case '|': + break; + default: + // PatternCharacter + incr(); + return createCharacter(res); + } + } + + function parseModifiersGroup() { + function hasDupChar(str) { + var i = 0; + while (i < str.length) { + if (str.indexOf(str[i], i + 1) != -1) { + return true; + } + i++; + } + return false; + } + + var from = pos; + incr(2); + + var enablingFlags = matchReg(/^[sim]+/); + var disablingFlags; + if(matchOne("-") && lookahead() !== ":"){ + disablingFlags = matchReg(/^[sim]+/); + if (!disablingFlags) { + bail('Invalid flags for modifiers group'); + } + } else if(!enablingFlags){ + bail('Invalid flags for modifiers group'); + } + + enablingFlags = enablingFlags ? enablingFlags[0] : ""; + disablingFlags = disablingFlags ? disablingFlags[0] : ""; + + var flags = enablingFlags + disablingFlags; + if(flags.length > 3 || hasDupChar(flags)) { + bail('flags cannot be duplicated for modifiers group'); + } + + if(!matchOne(":")) { + bail('Invalid flags for modifiers group'); + } + + var modifiersGroup = finishGroup("ignore", from); + + modifiersGroup.modifierFlags = { + enabling: enablingFlags, + disabling: disablingFlags + }; + + return modifiersGroup; + } + + function parseUnicodeSurrogatePairEscape(firstEscape, isUnicodeMode) { + if (isUnicodeMode) { + var first, second; + if (firstEscape.kind == 'unicodeEscape' && + (first = firstEscape.codePoint) >= 0xD800 && first <= 0xDBFF && + currentOne('\\') && next('u') ) { + var prevPos = pos; + pos++; + var secondEscape = parseClassEscape(); + if (secondEscape.kind == 'unicodeEscape' && + (second = secondEscape.codePoint) >= 0xDC00 && second <= 0xDFFF) { + // Unicode surrogate pair + firstEscape.kind = 'unicodeCodePointEscape'; + firstEscape.codePoint = (first - 0xD800) * 0x400 + second - 0xDC00 + 0x10000; + firstEscape.range[1] = pos; + firstEscape.raw = str.substring(firstEscape.range[0], pos) + } + else { + pos = prevPos; + } + } + } + return firstEscape; + } + + function parseClassEscape() { + return parseAtomEscape(true); + } + + function parseAtomEscape(insideCharacterClass) { + // AtomEscape :: + // DecimalEscape + // CharacterEscape + // CharacterClassEscape + // k GroupName + + var res, from = pos, ch; + + switch (ch = lookahead()) { + case '0': + case '1': + case '2': + case '3': + case '4': + case '5': + case '6': + case '7': + case '8': + case '9': + return parseDecimalEscape(insideCharacterClass); + case 'B': { + if (insideCharacterClass) { + bail('\\B not possible inside of CharacterClass', '', from); + break; + } else { + return parseIdentityEscape(); + } + } + case 'b': { + if (insideCharacterClass) { + // 15.10.2.19 + // The production ClassEscape :: b evaluates by returning the + // CharSet containing the one character (Unicode value 0008). + incr(); + return createEscaped('singleEscape', 0x0008, '\\b'); + } else { + return parseIdentityEscape(); + } + } + case 'c': { + if (insideCharacterClass) { + if (!isUnicodeMode && (res = matchReg(/^c(\d)/))) { + // B.1.4 + // c ClassControlLetter, ClassControlLetter = DecimalDigit + return createEscaped('controlLetter', res[1] + 16, res[1], 2); + } else if (!isUnicodeMode && match("c_")) { + // B.1.4 + // c ClassControlLetter, ClassControlLetter = _ + return createEscaped('controlLetter', 31, '_', 2); + } + } + return parseCharacterEscape(); + } + // CharacterClassEscape :: one of d D s S w W + case 'd': + case 'D': + case 'w': + case 'W': + case 's': + case 'S': + incr(); + return createCharacterClassEscape(ch); + case 'k': + return parseNamedReference() || parseIdentityEscape(); + case 'p': + case 'P': + return parseUnicodePropertyEscape() || parseIdentityEscape(); + case '-': { + // [+U] - + if (insideCharacterClass && isUnicodeMode) { + incr(); + return createEscaped('singleEscape', 0x002d, '\\-'); + } + return parseIdentityEscape(); + } + default: + return parseCharacterEscape(); + } + } + + + function parseDecimalEscape(insideCharacterClass) { + // DecimalEscape :: + // DecimalIntegerLiteral [lookahead ∉ DecimalDigit] + + var res, match, from = pos; + + if (res = matchReg(/^(?!0)\d+/)) { + match = res[0]; + var refIdx = parseInt(match, 10); + if (refIdx <= closedCaptureCounter && !insideCharacterClass) { + // If the number is smaller than the normal-groups found so + // far, then it is a reference... + return createReference(match); + } else { + // ... otherwise it needs to be interpreted as a octal (if the + // number is in an octal format). If it is NOT octal format, + // then the slash is ignored and the number is matched later + // as normal characters. + + // Recall the negative decision to decide if the input must be parsed + // a second time with the total normal-groups. + backrefDenied.push(refIdx); + + // \1 octal escapes are disallowed in unicode mode, but they might + // be references to groups which haven't been parsed yet. + // We must parse a second time to determine if \1 is a reference + // or an octal scape, and then we can report the error. + if (firstIteration) { + shouldReparse = true; + } else { + bailOctalEscapeIfUnicode(from, pos); + } + + // Reset the position again, as maybe only parts of the previous + // matched numbers are actual octal numbers. E.g. in '019' only + // the '01' should be matched. + incr(-match.length); + if (res = matchReg(/^[0-7]{1,3}/)) { + return createEscaped('octal', parseInt(res[0], 8), res[0], 1); + } else { + // If we end up here, we have a case like /\91/. Then the + // first slash is to be ignored and the 9 & 1 to be treated + // like ordinary characters. Create a character for the + // first number only here - other number-characters + // (if available) will be matched later. + var start = pos; + res = createCharacter(matchReg(/^[89]/)); + return updateRawStart(res, start - 1); + } + } + } + // Only allow octal numbers in the following. All matched numbers start + // with a zero (if the do not, the previous if-branch is executed). + // If the number is not octal format and starts with zero (e.g. `091`) + // then only the zeros `0` is treated here and the `91` are ordinary + // characters. + // Example: + // /\091/.exec('\091')[0].length === 3 + else if (res = matchReg(/^[0-7]{1,3}/)) { + match = res[0]; + if (match !== '0') { + bailOctalEscapeIfUnicode(from, pos); + } + if (/^0{1,3}$/.test(match)) { + // If they are all zeros, then only take the first one. + return createEscaped('null', 0x0000, '0', match.length); + } else { + return createEscaped('octal', parseInt(match, 8), match, 1); + } + } + return false; + } + + function bailOctalEscapeIfUnicode(from, pos) { + if (isUnicodeMode) { + bail("Invalid decimal escape in unicode mode", null, from, pos); + } + } + + function parseUnicodePropertyEscape() { + var res, from = pos; + if (features.unicodePropertyEscape && isUnicodeMode && (res = matchReg(/^([pP])\{([^}]+)\}/))) { + // https://github.com/jviereck/regjsparser/issues/77 + return { + type: 'unicodePropertyEscape', + negative: res[1] === 'P', + value: res[2], + range: [from - 1, pos], + raw: str.substring(from - 1, pos) + }; + } + return false; + } + + function parseNamedReference() { + if (features.namedGroups && matchReg(/^k<(?=.*?>)/)) { + var name = parseIdentifier(); + skip('>'); + return createNamedReference(name); + } + } + + function parseRegExpUnicodeEscapeSequence(isUnicodeMode) { + var res; + if (res = matchReg(/^u([0-9a-fA-F]{4})/)) { + // UnicodeEscapeSequence + return parseUnicodeSurrogatePairEscape( + createEscaped('unicodeEscape', parseInt(res[1], 16), res[1], 2), + isUnicodeMode + ); + } else if (isUnicodeMode && (res = matchReg(/^u\{([0-9a-fA-F]+)\}/))) { + // RegExpUnicodeEscapeSequence (ES6 Unicode code point escape) + return createEscaped('unicodeCodePointEscape', parseInt(res[1], 16), res[1], 4); + } + } + + function parseCharacterEscape() { + // CharacterEscape :: + // ControlEscape + // c ControlLetter + // HexEscapeSequence + // UnicodeEscapeSequence[?UnicodeMode] + // IdentityEscape[?UnicodeMode] + + var res; + var from = pos; + switch (lookahead()) { + case 't': + incr(); + return createEscaped('singleEscape', 0x009, '\\t'); + case 'n': + incr(); + return createEscaped('singleEscape', 0x00A, '\\n'); + case 'v': + incr(); + return createEscaped('singleEscape', 0x00B, '\\v'); + case 'f': + incr(); + return createEscaped('singleEscape', 0x00C, '\\f'); + case 'r': + incr(); + return createEscaped('singleEscape', 0x00D, '\\r'); + case 'c': + if (res = matchReg(/^c([a-zA-Z])/)) { + // c ControlLetter + return createEscaped('controlLetter', res[1].charCodeAt(0) % 32, res[1], 2); + } + break; + case 'x': + if (res = matchReg(/^x([0-9a-fA-F]{2})/)) { + // HexEscapeSequence + return createEscaped('hexadecimalEscape', parseInt(res[1], 16), res[1], 2); + } + break; + case 'u': + if (res = parseRegExpUnicodeEscapeSequence(isUnicodeMode)) { + if (!res || res.codePoint > 0x10FFFF) { + bail('Invalid escape sequence', null, from, pos); + } + return res; + } + break; + } + // IdentityEscape + return parseIdentityEscape(); + } + + function parseIdentifierAtom(check) { + // RegExpIdentifierStart[UnicodeMode] :: + // IdentifierStartChar + // \ RegExpUnicodeEscapeSequence[+UnicodeMode] + // [~UnicodeMode] UnicodeLeadSurrogate UnicodeTrailSurrogate + // + // RegExpIdentifierPart[UnicodeMode] :: + // IdentifierPartChar + // \ RegExpUnicodeEscapeSequence[+UnicodeMode] + // [~UnicodeMode] UnicodeLeadSurrogate UnicodeTrailSurrogate + + + var ch = lookahead(); + var from = pos; + if (ch === '\\') { + incr(); + var esc = parseRegExpUnicodeEscapeSequence(true); + if (!esc || !check(esc.codePoint)) { + bail('Invalid escape sequence', null, from, pos); + } + return fromCodePoint(esc.codePoint); + } + var code = ch.charCodeAt(0); + if (code >= 0xD800 && code <= 0xDBFF) { + ch += str[pos + 1]; + var second = ch.charCodeAt(1); + if (second >= 0xDC00 && second <= 0xDFFF) { + // Unicode surrogate pair + code = (code - 0xD800) * 0x400 + second - 0xDC00 + 0x10000; + } + } + if (!check(code)) return; + incr(); + if (code > 0xFFFF) incr(); + return ch; + } + + function parseIdentifier() { + // RegExpIdentifierName :: + // RegExpIdentifierStart + // RegExpIdentifierName RegExpIdentifierContinue + // + // RegExpIdentifierStart :: + // UnicodeIDStart + // $ + // _ + // \ RegExpUnicodeEscapeSequence + // + // RegExpIdentifierContinue :: + // UnicodeIDContinue + // $ + // _ + // \ RegExpUnicodeEscapeSequence + // + // + + var start = pos; + var res = parseIdentifierAtom(isIdentifierStart); + if (!res) { + bail('Invalid identifier'); + } + + var ch; + while (ch = parseIdentifierAtom(isIdentifierPart)) { + res += ch; + } + + return { + type: 'identifier', + value: res, + range: [start, pos], + raw: str.substring(start, pos) + }; + } + + function isIdentifierStart(ch) { + // ECMAScript (Unicode v17.0.0) NonAsciiIdentifierStart: + // Generated by `tools/generate-identifier-regex.js`. + + var NonAsciiIdentifierStart = 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\uDEC0-\uDEC7\uDEC9-\uDEE4\uDF00-\uDF35\uDF40-\uDF55\uDF60-\uDF72\uDF80-\uDF91]|\uD803[\uDC00-\uDC48\uDC80-\uDCB2\uDCC0-\uDCF2\uDD00-\uDD23\uDD4A-\uDD65\uDD6F-\uDD85\uDE80-\uDEA9\uDEB0\uDEB1\uDEC2-\uDEC7\uDF00-\uDF1C\uDF27\uDF30-\uDF45\uDF70-\uDF81\uDFB0-\uDFC4\uDFE0-\uDFF6]|\uD804[\uDC03-\uDC37\uDC71\uDC72\uDC75\uDC83-\uDCAF\uDCD0-\uDCE8\uDD03-\uDD26\uDD44\uDD47\uDD50-\uDD72\uDD76\uDD83-\uDDB2\uDDC1-\uDDC4\uDDDA\uDDDC\uDE00-\uDE11\uDE13-\uDE2B\uDE3F\uDE40\uDE80-\uDE86\uDE88\uDE8A-\uDE8D\uDE8F-\uDE9D\uDE9F-\uDEA8\uDEB0-\uDEDE\uDF05-\uDF0C\uDF0F\uDF10\uDF13-\uDF28\uDF2A-\uDF30\uDF32\uDF33\uDF35-\uDF39\uDF3D\uDF50\uDF5D-\uDF61\uDF80-\uDF89\uDF8B\uDF8E\uDF90-\uDFB5\uDFB7\uDFD1\uDFD3]|\uD805[\uDC00-\uDC34\uDC47-\uDC4A\uDC5F-\uDC61\uDC80-\uDCAF\uDCC4\uDCC5\uDCC7\uDD80-\uDDAE\uDDD8-\uDDDB\uDE00-\uDE2F\uDE44\uDE80-\uDEAA\uDEB8\uDF00-\uDF1A\uDF40-\uDF46]|\uD806[\uDC00-\uDC2B\uDCA0-\uDCDF\uDCFF-\uDD06\uDD09\uDD0C-\uDD13\uDD15\uDD16\uDD18-\uDD2F\uDD3F\uDD41\uDDA0-\uDDA7\uDDAA-\uDDD0\uDDE1\uDDE3\uDE00\uDE0B-\uDE32\uDE3A\uDE50\uDE5C-\uDE89\uDE9D\uDEB0-\uDEF8\uDFC0-\uDFE0]|\uD807[\uDC00-\uDC08\uDC0A-\uDC2E\uDC40\uDC72-\uDC8F\uDD00-\uDD06\uDD08\uDD09\uDD0B-\uDD30\uDD46\uDD60-\uDD65\uDD67\uDD68\uDD6A-\uDD89\uDD98\uDDB0-\uDDDB\uDEE0-\uDEF2\uDF02\uDF04-\uDF10\uDF12-\uDF33\uDFB0]|\uD808[\uDC00-\uDF99]|\uD809[\uDC00-\uDC6E\uDC80-\uDD43]|\uD80B[\uDF90-\uDFF0]|[\uD80C\uD80E\uD80F\uD81C-\uD822\uD840-\uD868\uD86A-\uD86D\uD86F-\uD872\uD874-\uD879\uD880-\uD883\uD885-\uD88C][\uDC00-\uDFFF]|\uD80D[\uDC00-\uDC2F\uDC41-\uDC46\uDC60-\uDFFF]|\uD810[\uDC00-\uDFFA]|\uD811[\uDC00-\uDE46]|\uD818[\uDD00-\uDD1D]|\uD81A[\uDC00-\uDE38\uDE40-\uDE5E\uDE70-\uDEBE\uDED0-\uDEED\uDF00-\uDF2F\uDF40-\uDF43\uDF63-\uDF77\uDF7D-\uDF8F]|\uD81B[\uDD40-\uDD6C\uDE40-\uDE7F\uDEA0-\uDEB8\uDEBB-\uDED3\uDF00-\uDF4A\uDF50\uDF93-\uDF9F\uDFE0\uDFE1\uDFE3\uDFF2-\uDFF6]|\uD823[\uDC00-\uDCD5\uDCFF-\uDD1E\uDD80-\uDDF2]|\uD82B[\uDFF0-\uDFF3\uDFF5-\uDFFB\uDFFD\uDFFE]|\uD82C[\uDC00-\uDD22\uDD32\uDD50-\uDD52\uDD55\uDD64-\uDD67\uDD70-\uDEFB]|\uD82F[\uDC00-\uDC6A\uDC70-\uDC7C\uDC80-\uDC88\uDC90-\uDC99]|\uD835[\uDC00-\uDC54\uDC56-\uDC9C\uDC9E\uDC9F\uDCA2\uDCA5\uDCA6\uDCA9-\uDCAC\uDCAE-\uDCB9\uDCBB\uDCBD-\uDCC3\uDCC5-\uDD05\uDD07-\uDD0A\uDD0D-\uDD14\uDD16-\uDD1C\uDD1E-\uDD39\uDD3B-\uDD3E\uDD40-\uDD44\uDD46\uDD4A-\uDD50\uDD52-\uDEA5\uDEA8-\uDEC0\uDEC2-\uDEDA\uDEDC-\uDEFA\uDEFC-\uDF14\uDF16-\uDF34\uDF36-\uDF4E\uDF50-\uDF6E\uDF70-\uDF88\uDF8A-\uDFA8\uDFAA-\uDFC2\uDFC4-\uDFCB]|\uD837[\uDF00-\uDF1E\uDF25-\uDF2A]|\uD838[\uDC30-\uDC6D\uDD00-\uDD2C\uDD37-\uDD3D\uDD4E\uDE90-\uDEAD\uDEC0-\uDEEB]|\uD839[\uDCD0-\uDCEB\uDDD0-\uDDED\uDDF0\uDEC0-\uDEDE\uDEE0-\uDEE2\uDEE4\uDEE5\uDEE7-\uDEED\uDEF0-\uDEF4\uDEFE\uDEFF\uDFE0-\uDFE6\uDFE8-\uDFEB\uDFED\uDFEE\uDFF0-\uDFFE]|\uD83A[\uDC00-\uDCC4\uDD00-\uDD43\uDD4B]|\uD83B[\uDE00-\uDE03\uDE05-\uDE1F\uDE21\uDE22\uDE24\uDE27\uDE29-\uDE32\uDE34-\uDE37\uDE39\uDE3B\uDE42\uDE47\uDE49\uDE4B\uDE4D-\uDE4F\uDE51\uDE52\uDE54\uDE57\uDE59\uDE5B\uDE5D\uDE5F\uDE61\uDE62\uDE64\uDE67-\uDE6A\uDE6C-\uDE72\uDE74-\uDE77\uDE79-\uDE7C\uDE7E\uDE80-\uDE89\uDE8B-\uDE9B\uDEA1-\uDEA3\uDEA5-\uDEA9\uDEAB-\uDEBB]|\uD869[\uDC00-\uDEDF\uDF00-\uDFFF]|\uD86E[\uDC00-\uDC1D\uDC20-\uDFFF]|\uD873[\uDC00-\uDEAD\uDEB0-\uDFFF]|\uD87A[\uDC00-\uDFE0\uDFF0-\uDFFF]|\uD87B[\uDC00-\uDE5D]|\uD87E[\uDC00-\uDE1D]|\uD884[\uDC00-\uDF4A\uDF50-\uDFFF]|\uD88D[\uDC00-\uDC79]/; + return (ch === 36) || (ch === 95) || // $ (dollar) and _ (underscore) + (ch >= 65 && ch <= 90) || // A..Z + (ch >= 97 && ch <= 122) || // a..z + ((ch >= 0x80) && NonAsciiIdentifierStart.test(fromCodePoint(ch))); + } + + // Taken from the Esprima parser. + function isIdentifierPart(ch) { + // ECMAScript (Unicode v17.0.0) NonAsciiIdentifierPartOnly: + // Generated by `tools/generate-identifier-regex.js`. + // eslint-disable-next-line no-misleading-character-class + var NonAsciiIdentifierPartOnly = 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+ return isIdentifierStart(ch) || + (ch >= 48 && ch <= 57) || // 0..9 + ((ch >= 0x80) && NonAsciiIdentifierPartOnly.test(fromCodePoint(ch))); + } + + function parseIdentityEscape() { + // IdentityEscape :: + // [+U] SyntaxCharacter + // [+U] / + // [~U] SourceCharacterIdentityEscape[?N] + // SourceCharacterIdentityEscape[?N] :: + // [~N] SourceCharacter but not c + // [+N] SourceCharacter but not one of c or k + + + var tmp; + var l = lookahead(); + if ( + (isUnicodeMode && /[\^$.*+?()\\[\]{}|/]/.test(l)) || + (!isUnicodeMode && l !== "c") + ) { + if (l === "k" && features.lookbehind) { + return null; + } + tmp = consume(1); + return createEscaped('identifier', tmp.charCodeAt(0), tmp, 1); + } + + return null; + } + + function parseCharacterClass() { + // CharacterClass :: + // [ [lookahead ∉ {^}] ClassContents ] + // [ ^ ClassContents ] + + var res, from = pos; + if (match("[^")) { + res = parseClassContents(); + skip(']'); + return createCharacterClass(res, true, from, pos); + } else if (matchOne('[')) { + res = parseClassContents(); + skip(']'); + return createCharacterClass(res, false, from, pos); + } + + return null; + } + + function parseClassContents() { + // ClassContents :: + // [empty] + // [~V] NonemptyClassRanges + // [+V] ClassSetExpression + + var res; + if (currentOne(']')) { + // Empty array means nothing inside of the ClassRange. + return { kind: 'union', body: [] }; + } else if (hasUnicodeSetFlag) { + return parseClassSetExpression(); + } else { + res = parseNonemptyClassRanges(); + if (!res) { + bail('nonEmptyClassRanges'); + } + return { kind: 'union', body: res }; + } + } + + function parseHelperClassContents(atom) { + var from, to, res, atomTo, dash; + if (currentOne('-') && !next(']')) { + // ClassAtom - ClassAtom ClassContents + from = atom.range[0]; + incr(); + dash = createCharacter('-'); + + atomTo = parseClassAtom(); + if (!atomTo) { + bail('classAtom'); + } + to = pos; + + // Parse the next class range if exists. + var classContents = parseClassContents(); + if (!classContents) { + bail('classContents'); + } + + // Check if both the from and atomTo have codePoints. + if (!('codePoint' in atom) || !('codePoint' in atomTo)) { + if (!isUnicodeMode) { + // If not, don't create a range but treat them as + // `atom` `-` `atom` instead. + // + // SEE: https://tc39.es/ecma262/#sec-regular-expression-patterns-semantics + // NonemptyClassRanges::ClassAtom - ClassAtom ClassContents + // CharacterRangeOrUnion + res = [atom, dash, atomTo]; + } else { + // With unicode flag, both sides must have codePoints if + // one side has a codePoint. + // + // SEE: https://tc39.es/ecma262/#sec-patterns-static-semantics-early-errors + // NonemptyClassRanges :: ClassAtom - ClassAtom ClassContents + bail('invalid character class'); + } + } else { + res = [createClassRange(atom, atomTo, from, to)]; + } + + if (classContents.type === 'empty') { + return res; + } + return res.concat(classContents.body); + } + + res = parseNonemptyClassRangesNoDash(); + if (!res) { + bail('nonEmptyClassRangesNoDash'); + } + + return [atom].concat(res); + } + + function parseNonemptyClassRanges() { + // NonemptyClassRanges :: + // ClassAtom + // ClassAtom NonemptyClassRangesNoDash + // ClassAtom - ClassAtom ClassContents + + var atom = parseClassAtom(); + if (!atom) { + bail('classAtom'); + } + + if (currentOne(']')) { + // ClassAtom + return [atom]; + } + + // ClassAtom NonemptyClassRangesNoDash + // ClassAtom - ClassAtom ClassContents + return parseHelperClassContents(atom); + } + + function parseNonemptyClassRangesNoDash() { + // NonemptyClassRangesNoDash :: + // ClassAtom + // ClassAtomNoDash NonemptyClassRangesNoDash + // ClassAtomNoDash - ClassAtom ClassContents + + var res = parseClassAtom(); + if (!res) { + bail('classAtom'); + } + if (currentOne(']')) { + // ClassAtom + return res; + } + + // ClassAtomNoDash NonemptyClassRangesNoDash + // ClassAtomNoDash - ClassAtom ClassContents + return parseHelperClassContents(res); + } + + function parseClassAtom() { + // ClassAtom :: + // - + // ClassAtomNoDash + if (matchOne('-')) { + return createCharacter('-'); + } else { + return parseClassAtomNoDash(); + } + } + + function parseClassAtomNoDash() { + // ClassAtomNoDash :: + // SourceCharacter but not one of \ or ] or - + // \ ClassEscape + // + // ClassAtomNoDash (Annex B):: + // \ [lookahead = c] + + var res; + switch ((res = lookahead())) { + case "\\": { + incr(); + res = parseClassEscape(); + if (!res) { + if (!isUnicodeMode && lookahead() == "c") { + return createCharacter("\\"); + } + bail("classEscape"); + } + + return parseUnicodeSurrogatePairEscape(res, isUnicodeMode); + } + case "]": + case "-": + break; + default: + incr(); + return createCharacter(res); + } + } + + function parseClassSetExpression() { + // ClassSetExpression :: + // ClassUnion + // ClassIntersection + // ClassSubtraction + // + // ClassUnion :: + // ClassSetRange ClassUnion? + // ClassSetOperand ClassUnion? + // + // ClassIntersection :: + // ClassSetOperand && [lookahead ≠ &] ClassSetOperand + // ClassIntersection && [lookahead ≠ &] ClassSetOperand + // + // ClassSubtraction :: + // ClassSetOperand -- ClassSetOperand + // ClassSubtraction -- ClassSetOperand + // + + var body = []; + var kind; + + var operand = parseClassSetOperand(/* allowRanges*/ true); + body.push(operand); + + if (operand.type === 'classRange') { + kind = 'union'; + } else if (currentOne('&')) { + kind = 'intersection'; + } else if (currentOne('-')) { + kind = 'subtraction'; + } else { + kind = 'union'; + } + + while (!currentOne(']')) { + if (kind === 'intersection') { + skip('&'); + skip('&'); + if (currentOne('&')) { + bail('&& cannot be followed by &. Wrap it in brackets: &&[&].'); + } + } else if (kind === 'subtraction') { + skip('-'); + skip('-'); + } + + operand = parseClassSetOperand(/* allowRanges*/ kind === 'union'); + body.push(operand); + } + + return { kind: kind, body: body }; + } + + function parseClassSetOperand(allowRanges) { + // ClassSetOperand :: + // ClassSetCharacter + // ClassStringDisjunction + // NestedClass + // + // NestedClass :: + // [ [lookahead ≠ ^] ClassContents[+U,+V] ] + // [ ^ ClassContents[+U,+V] ] + // \ CharacterClassEscape[+U, +V] + // + // ClassSetRange :: + // ClassSetCharacter - ClassSetCharacter + // + // ClassSetCharacter :: + // [lookahead ∉ ClassReservedDouble] SourceCharacter but not ClassSetSyntaxCharacter + // \ CharacterEscape[+U] + // \ ClassHalfOfDouble + // \ b + // + // ClassSyntaxCharacter :: + // one of ( ) [ ] { } / - \ | + + var from = pos; + var start, res; + + if (matchOne('\\')) { + // ClassSetOperand :: + // ... + // ClassStringDisjunction + // NestedClass + // + // NestedClass :: + // ... + // \ CharacterClassEscape[+U, +V] + if (match('q{')) { + return parseClassStringDisjunction(); + } else if (res = parseClassEscape()) { + start = res; + } else if (res = parseClassSetCharacterEscapedHelper()) { + return res; + } else { + bail('Invalid escape', '\\' + lookahead(), from); + } + } else if (res = parseClassSetCharacterUnescapedHelper()) { + start = res; + } else if (res = parseCharacterClass()) { + // ClassSetOperand :: + // ... + // NestedClass + // + // NestedClass :: + // [ [lookahead ≠ ^] ClassContents[+U,+V] ] + // [ ^ ClassContents[+U,+V] ] + // ... + return res; + } else { + bail('Invalid character', lookahead()); + } + + if (allowRanges && currentOne('-') && !next('-')) { + incr(); + + if (res = parseClassSetCharacter()) { + // ClassSetRange :: + // ClassSetCharacter - ClassSetCharacter + return createClassRange(start, res, from, pos); + } + + bail('Invalid range end', lookahead()); + } + + // ClassSetOperand :: + // ClassSetCharacter + // ... + return start; + } + + function parseClassSetCharacter() { + // ClassSetCharacter :: + // [lookahead ∉ ClassReservedDouble] SourceCharacter but not ClassSetSyntaxCharacter + // \ CharacterEscape[+U] + // \ ClassHalfOfDouble + // \ b + + if (matchOne('\\')) { + var res, from = pos; + if (res = parseClassSetCharacterEscapedHelper()) { + return res; + } else { + bail('Invalid escape', '\\' + lookahead(), from); + } + } + + return parseClassSetCharacterUnescapedHelper(); + } + + function parseClassSetCharacterUnescapedHelper() { + // ClassSetCharacter :: + // [lookahead ∉ ClassSetReservedDoublePunctuator] SourceCharacter but not ClassSetSyntaxCharacter + // ... + + var res; + if (matchReg(/^(?:&&|!!|##|\$\$|%%|\*\*|\+\+|,,|\.\.|::|;;|<<|==|>>|\?\?|@@|\^\^|``|~~)/)) { + bail('Invalid set operation in character class'); + } + if (res = matchReg(/^[^()[\]{}/\-\\|]/)) { + return createCharacter(res); + } + } + + function parseClassSetCharacterEscapedHelper() { + // ClassSetCharacter :: + // ... + // \ CharacterEscape[+U] + // \ ClassSetReservedPunctuator + // \ b + + var res; + if (matchOne('b')) { + return createEscaped('singleEscape', 0x0008, '\\b'); + } else if (matchOne('B')) { + bail('\\B not possible inside of ClassContents', '', pos - 2); + } else if (res = matchReg(/^[&\-!#%,:;<=>@`~]/)) { + return createEscaped('identifier', res[0].codePointAt(0), res[0]); + } else if (res = parseCharacterEscape()) { + return res; + } else { + return null; + } + } + + function parseClassStringDisjunction() { + // ClassStringDisjunction :: + // \q{ ClassStringDisjunctionContents } + // + // ClassStringDisjunctionContents :: + // ClassString + // ClassString | ClassStringDisjunctionContents + + + // When calling this function, \q{ has already been consumed. + var from = pos - 3; + + var res = []; + do { + res.push(parseClassString()); + } while (matchOne('|')); + + skip('}'); + + return createClassStrings(res, from, pos); + } + + function parseClassString() { + // ClassString :: + // [empty] + // NonEmptyClassString + // + // NonEmptyClassString :: + // ClassSetCharacter NonEmptyClassString? + + var res = [], from = pos; + var char; + + while (char = parseClassSetCharacter()) { + res.push(char); + } + + return createClassString(res, from, pos); + } + + function bail(message, details, from, to) { + from = from == null ? pos : from; + to = to == null ? from : to; + + var contextStart = Math.max(0, from - 10); + var contextEnd = Math.min(to + 10, str.length); + + // Output a bit of context and a line pointing to where our error is. + // + // We are assuming that there are no actual newlines in the content as this is a regular expression. + var context = ' ' + str.substring(contextStart, contextEnd); + var pointer = ' ' + new Array(from - contextStart + 1).join(' ') + '^'; + + throw SyntaxError(message + ' at position ' + from + (details ? ': ' + details : '') + '\n' + context + '\n' + pointer); + } + + var backrefDenied = []; + var closedCaptureCounter = 0; + var firstIteration = true; + var shouldReparse = false; + var hasUnicodeFlag = (flags || "").indexOf("u") !== -1; + var hasUnicodeSetFlag = (flags || "").indexOf("v") !== -1; + var isUnicodeMode = hasUnicodeFlag || hasUnicodeSetFlag; + var pos = 0; + + if (hasUnicodeSetFlag && !features.unicodeSet) { + throw new Error('The "v" flag is only supported when the .unicodeSet option is enabled.'); + } + + if (hasUnicodeFlag && hasUnicodeSetFlag) { + throw new Error('The "u" and "v" flags are mutually exclusive.'); + } + + // Convert the input to a string and treat the empty string special. + str = String(str); + if (str === '') { + str = '(?:)'; + } + + var result = parseDisjunction(); + + if (result.range[1] !== str.length) { + bail('Could not parse entire input - got stuck', '', result.range[1]); + } + + // The spec requires to interpret the `\2` in `/\2()()/` as backreference. + // As the parser collects the number of capture groups as the string is + // parsed it is impossible to make these decisions at the point when the + // `\2` is handled. In case the local decision turns out to be wrong after + // the parsing has finished, the input string is parsed a second time with + // the total number of capture groups set. + // + // SEE: https://github.com/jviereck/regjsparser/issues/70 + shouldReparse = shouldReparse || backrefDenied.some(function (ref) { + return ref <= closedCaptureCounter; + }); + if (shouldReparse) { + // Parse the input a second time. + pos = 0; + firstIteration = false; + return parseDisjunction(); + } + + return result; + } + + var regjsparser = { + parse: parse + }; + + if (typeof module !== 'undefined' && module.exports) { + module.exports = regjsparser; + } else { + window.regjsparser = regjsparser; + } + +}());