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Diffstat (limited to 'node_modules/regjsparser/parser.js')
| -rw-r--r-- | node_modules/regjsparser/parser.js | 962 |
1 files changed, 962 insertions, 0 deletions
diff --git a/node_modules/regjsparser/parser.js b/node_modules/regjsparser/parser.js new file mode 100644 index 0000000..ae414a3 --- /dev/null +++ b/node_modules/regjsparser/parser.js @@ -0,0 +1,962 @@ +// 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 +// Atom +// Atom Quantifier +// +// Anchor :: +// ^ +// $ +// \ b +// \ B +// ( ? = Disjunction ) +// ( ? ! Disjunction ) +// +// Quantifier :: +// QuantifierPrefix +// QuantifierPrefix ? +// +// QuantifierPrefix :: +// * +// + +// ? +// { DecimalDigits } +// { DecimalDigits , } +// { DecimalDigits , DecimalDigits } +// +// Atom :: +// PatternCharacter +// . +// \ AtomEscape +// CharacterClass +// ( Disjunction ) +// ( ? : Disjunction ) +// +// PatternCharacter :: +// SourceCharacter but not any of: ^ $ \ . * + ? ( ) [ ] { } | +// +// AtomEscape :: +// DecimalEscape +// CharacterEscape +// CharacterClassEscape +// +// 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 IdentifierPart +// <ZWJ> +// <ZWNJ> +// +// DecimalEscape :: +// DecimalIntegerLiteral [lookahead ∉ DecimalDigit] +// +// CharacterClassEscape :: +// one of d D s S w W +// +// CharacterClass :: +// [ [lookahead ∉ {^}] ClassRanges ] +// [ ^ ClassRanges ] +// +// ClassRanges :: +// [empty] +// NonemptyClassRanges +// +// NonemptyClassRanges :: +// ClassAtom +// ClassAtom NonemptyClassRangesNoDash +// ClassAtom - ClassAtom ClassRanges +// +// NonemptyClassRangesNoDash :: +// ClassAtom +// ClassAtomNoDash NonemptyClassRangesNoDash +// ClassAtomNoDash - ClassAtom ClassRanges +// +// ClassAtom :: +// - +// ClassAtomNoDash +// +// ClassAtomNoDash :: +// SourceCharacter but not one of \ or ] or - +// \ ClassEscape +// +// ClassEscape :: +// DecimalEscape +// b +// CharacterEscape +// CharacterClassEscape + +(function() { + + function parse(str, flags) { + function addRaw(node) { + node.raw = str.substring(node.range[0], node.range[1]); + return node; + } + + function updateRawStart(node, start) { + node.range[0] = start; + return addRaw(node); + } + + function createAnchor(kind, rawLength) { + return addRaw({ + type: 'anchor', + kind: kind, + range: [ + pos - rawLength, + pos + ] + }); + } + + function createValue(kind, codePoint, from, to) { + return addRaw({ + type: 'value', + kind: kind, + codePoint: codePoint, + range: [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 (hasUnicodeFlag) { + 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 addRaw({ + type: 'disjunction', + body: alternatives, + range: [ + from, + to + ] + }); + } + + function createDot() { + return addRaw({ + type: 'dot', + range: [ + pos - 1, + pos + ] + }); + } + + function createCharacterClassEscape(value) { + return addRaw({ + type: 'characterClassEscape', + value: value, + range: [ + pos - 2, + pos + ] + }); + } + + function createReference(matchIndex) { + return addRaw({ + type: 'reference', + matchIndex: parseInt(matchIndex, 10), + range: [ + pos - 1 - matchIndex.length, + pos + ] + }); + } + + function createGroup(behavior, disjunction, from, to) { + return addRaw({ + type: 'group', + behavior: behavior, + body: disjunction, + range: [ + from, + to + ] + }); + } + + function createQuantifier(min, max, from, to) { + if (to == null) { + from = pos - 1; + to = pos; + } + + return addRaw({ + type: 'quantifier', + min: min, + max: max, + greedy: true, + body: null, // set later on + range: [ + from, + to + ] + }); + } + + function createAlternative(terms, from, to) { + return addRaw({ + type: 'alternative', + body: terms, + range: [ + from, + to + ] + }); + } + + function createCharacterClass(classRanges, negative, from, to) { + return addRaw({ + type: 'characterClass', + body: classRanges, + negative: negative, + range: [ + 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 addRaw({ + type: 'characterClassRange', + min: min, + max: max, + range: [ + from, + to + ] + }); + } + + function flattenBody(body) { + if (body.type === 'alternative') { + return body.body; + } else { + return [body]; + } + } + + function isEmpty(obj) { + return obj.type === 'empty'; + } + + function incr(amount) { + amount = (amount || 1); + var res = str.substring(pos, pos + amount); + pos += (amount || 1); + return res; + } + + function skip(value) { + if (!match(value)) { + bail('character', value); + } + } + + function match(value) { + if (str.indexOf(value, pos) === pos) { + return incr(value.length); + } + } + + function lookahead() { + return str[pos]; + } + + function current(value) { + return str.indexOf(value, pos) === pos; + } + + function next(value) { + return str[pos + 1] === value; + } + + function matchReg(regExp) { + var subStr = str.substring(pos); + var res = subStr.match(regExp); + if (res) { + res.range = []; + res.range[0] = pos; + incr(res[0].length); + res.range[1] = pos; + } + return res; + } + + function parseDisjunction() { + // Disjunction :: + // Alternative + // Alternative | Disjunction + var res = [], from = pos; + res.push(parseAlternative()); + + while (match('|')) { + 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 + + if (pos >= str.length || current('|') || current(')')) { + return null; /* Means: The term is empty */ + } + + var anchor = parseAnchor(); + + if (anchor) { + return anchor; + } + + var atom = parseAtom(); + if (!atom) { + bail('Expected atom'); + } + var quantifier = parseQuantifier() || false; + if (quantifier) { + 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 = null, from = pos; + + if (match(matchA)) { + type = typeA; + } else if (match(matchB)) { + type = typeB; + } else { + return false; + } + + 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 ) + var res, from = pos; + + if (match('^')) { + return createAnchor('start', 1 /* rawLength */); + } else if (match('$')) { + return createAnchor('end', 1 /* rawLength */); + } else if (match('\\b')) { + return createAnchor('boundary', 2 /* rawLength */); + } else if (match('\\B')) { + return createAnchor('not-boundary', 2 /* rawLength */); + } else { + return parseGroup('(?=', 'lookahead', '(?!', 'negativeLookahead'); + } + } + + function parseQuantifier() { + // Quantifier :: + // QuantifierPrefix + // QuantifierPrefix ? + // + // QuantifierPrefix :: + // * + // + + // ? + // { DecimalDigits } + // { DecimalDigits , } + // { DecimalDigits , DecimalDigits } + + var res, from = pos; + var quantifier; + var min, max; + + if (match('*')) { + quantifier = createQuantifier(0); + } + else if (match('+')) { + quantifier = createQuantifier(1); + } + else if (match('?')) { + quantifier = createQuantifier(0, 1); + } + else if (res = matchReg(/^\{([0-9]+)\}/)) { + min = parseInt(res[1], 10); + quantifier = createQuantifier(min, min, res.range[0], res.range[1]); + } + else if (res = matchReg(/^\{([0-9]+),\}/)) { + min = parseInt(res[1], 10); + quantifier = createQuantifier(min, undefined, res.range[0], res.range[1]); + } + else if (res = matchReg(/^\{([0-9]+),([0-9]+)\}/)) { + min = parseInt(res[1], 10); + max = parseInt(res[2], 10); + if (min > max) { + bail('numbers out of order in {} quantifier', '', from, pos); + } + quantifier = createQuantifier(min, max, res.range[0], res.range[1]); + } + + if (quantifier) { + if (match('?')) { + quantifier.greedy = false; + quantifier.range[1] += 1; + } + } + + return quantifier; + } + + function parseAtom() { + // Atom :: + // PatternCharacter + // . + // \ AtomEscape + // CharacterClass + // ( Disjunction ) + // ( ? : Disjunction ) + + var res; + + // jviereck: allow ']', '}' here as well to be compatible with browser's + // implementations: ']'.match(/]/); + // if (res = matchReg(/^[^^$\\.*+?()[\]{}|]/)) { + if (res = matchReg(/^[^^$\\.*+?(){[|]/)) { + // PatternCharacter + return createCharacter(res); + } + else if (match('.')) { + // . + return createDot(); + } + else if (match('\\')) { + // \ AtomEscape + res = parseAtomEscape(); + if (!res) { + bail('atomEscape'); + } + return res; + } + else if (res = parseCharacterClass()) { + return res; + } + else { + // ( Disjunction ) + // ( ? : Disjunction ) + return parseGroup('(?:', 'ignore', '(', 'normal'); + } + } + + function parseUnicodeSurrogatePairEscape(firstEscape) { + if (hasUnicodeFlag) { + var first, second; + if (firstEscape.kind == 'unicodeEscape' && + (first = firstEscape.codePoint) >= 0xD800 && first <= 0xDBFF && + current('\\') && next('u') ) { + var prevPos = pos; + pos++; + var secondEscape = parseClassEscape(); + if (secondEscape.kind == 'unicodeEscape' && + (second = secondEscape.codePoint) >= 0xDC00 && second <= 0xDFFF) { + // Unicode surrogate pair + firstEscape.range[1] = secondEscape.range[1]; + firstEscape.codePoint = (first - 0xD800) * 0x400 + second - 0xDC00 + 0x10000; + firstEscape.type = 'value'; + firstEscape.kind = 'unicodeCodePointEscape'; + addRaw(firstEscape); + } + else { + pos = prevPos; + } + } + } + return firstEscape; + } + + function parseClassEscape() { + return parseAtomEscape(true); + } + + function parseAtomEscape(insideCharacterClass) { + // AtomEscape :: + // DecimalEscape + // CharacterEscape + // CharacterClassEscape + + var res, from = pos; + + res = parseDecimalEscape(); + if (res) { + return res; + } + + // For ClassEscape + if (insideCharacterClass) { + if (match('b')) { + // 15.10.2.19 + // The production ClassEscape :: b evaluates by returning the + // CharSet containing the one character <BS> (Unicode value 0008). + return createEscaped('singleEscape', 0x0008, '\\b'); + } else if (match('B')) { + bail('\\B not possible inside of CharacterClass', '', from); + } + } + + res = parseCharacterEscape(); + + return res; + } + + + function parseDecimalEscape() { + // DecimalEscape :: + // DecimalIntegerLiteral [lookahead ∉ DecimalDigit] + // CharacterClassEscape :: one of d D s S w W + + var res, match; + + if (res = matchReg(/^(?!0)\d+/)) { + match = res[0]; + var refIdx = parseInt(res[0], 10); + if (refIdx <= closedCaptureCounter) { + // If the number is smaller than the normal-groups found so + // far, then it is a reference... + return createReference(res[0]); + } 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); + + // 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(-res[0].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. + res = createCharacter(matchReg(/^[89]/)); + return updateRawStart(res, res.range[0] - 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 (/^0{1,3}$/.test(match)) { + // If they are all zeros, then only take the first one. + return createEscaped('null', 0x0000, '0', match.length + 1); + } else { + return createEscaped('octal', parseInt(match, 8), match, 1); + } + } else if (res = matchReg(/^[dDsSwW]/)) { + return createCharacterClassEscape(res[0]); + } + return false; + } + + function parseCharacterEscape() { + // CharacterEscape :: + // ControlEscape + // c ControlLetter + // HexEscapeSequence + // UnicodeEscapeSequence + // IdentityEscape + + var res; + if (res = matchReg(/^[fnrtv]/)) { + // ControlEscape + var codePoint = 0; + switch (res[0]) { + case 't': codePoint = 0x009; break; + case 'n': codePoint = 0x00A; break; + case 'v': codePoint = 0x00B; break; + case 'f': codePoint = 0x00C; break; + case 'r': codePoint = 0x00D; break; + } + return createEscaped('singleEscape', codePoint, '\\' + res[0]); + } else if (res = matchReg(/^c([a-zA-Z])/)) { + // c ControlLetter + return createEscaped('controlLetter', res[1].charCodeAt(0) % 32, res[1], 2); + } else if (res = matchReg(/^x([0-9a-fA-F]{2})/)) { + // HexEscapeSequence + return createEscaped('hexadecimalEscape', parseInt(res[1], 16), res[1], 2); + } else if (res = matchReg(/^u([0-9a-fA-F]{4})/)) { + // UnicodeEscapeSequence + return parseUnicodeSurrogatePairEscape( + createEscaped('unicodeEscape', parseInt(res[1], 16), res[1], 2) + ); + } else if (hasUnicodeFlag && (res = matchReg(/^u\{([0-9a-fA-F]+)\}/))) { + // RegExpUnicodeEscapeSequence (ES6 Unicode code point escape) + return createEscaped('unicodeCodePointEscape', parseInt(res[1], 16), res[1], 4); + } else { + // IdentityEscape + return parseIdentityEscape(); + } + } + + // Taken from the Esprima parser. + function isIdentifierPart(ch) { + // Generated by `tools/generate-identifier-regex.js`. + var NonAsciiIdentifierPart = new RegExp('[\xAA\xB5\xBA\xC0-\xD6\xD8-\xF6\xF8-\u02C1\u02C6-\u02D1\u02E0-\u02E4\u02EC\u02EE\u0300-\u0374\u0376\u0377\u037A-\u037D\u037F\u0386\u0388-\u038A\u038C\u038E-\u03A1\u03A3-\u03F5\u03F7-\u0481\u0483-\u0487\u048A-\u052F\u0531-\u0556\u0559\u0561-\u0587\u0591-\u05BD\u05BF\u05C1\u05C2\u05C4\u05C5\u05C7\u05D0-\u05EA\u05F0-\u05F2\u0610-\u061A\u0620-\u0669\u066E-\u06D3\u06D5-\u06DC\u06DF-\u06E8\u06EA-\u06FC\u06FF\u0710-\u074A\u074D-\u07B1\u07C0-\u07F5\u07FA\u0800-\u082D\u0840-\u085B\u08A0-\u08B2\u08E4-\u0963\u0966-\u096F\u0971-\u0983\u0985-\u098C\u098F\u0990\u0993-\u09A8\u09AA-\u09B0\u09B2\u09B6-\u09B9\u09BC-\u09C4\u09C7\u09C8\u09CB-\u09CE\u09D7\u09DC\u09DD\u09DF-\u09E3\u09E6-\u09F1\u0A01-\u0A03\u0A05-\u0A0A\u0A0F\u0A10\u0A13-\u0A28\u0A2A-\u0A30\u0A32\u0A33\u0A35\u0A36\u0A38\u0A39\u0A3C\u0A3E-\u0A42\u0A47\u0A48\u0A4B-\u0A4D\u0A51\u0A59-\u0A5C\u0A5E\u0A66-\u0A75\u0A81-\u0A83\u0A85-\u0A8D\u0A8F-\u0A91\u0A93-\u0AA8\u0AAA-\u0AB0\u0AB2\u0AB3\u0AB5-\u0AB9\u0ABC-\u0AC5\u0AC7-\u0AC9\u0ACB-\u0ACD\u0AD0\u0AE0-\u0AE3\u0AE6-\u0AEF\u0B01-\u0B03\u0B05-\u0B0C\u0B0F\u0B10\u0B13-\u0B28\u0B2A-\u0B30\u0B32\u0B33\u0B35-\u0B39\u0B3C-\u0B44\u0B47\u0B48\u0B4B-\u0B4D\u0B56\u0B57\u0B5C\u0B5D\u0B5F-\u0B63\u0B66-\u0B6F\u0B71\u0B82\u0B83\u0B85-\u0B8A\u0B8E-\u0B90\u0B92-\u0B95\u0B99\u0B9A\u0B9C\u0B9E\u0B9F\u0BA3\u0BA4\u0BA8-\u0BAA\u0BAE-\u0BB9\u0BBE-\u0BC2\u0BC6-\u0BC8\u0BCA-\u0BCD\u0BD0\u0BD7\u0BE6-\u0BEF\u0C00-\u0C03\u0C05-\u0C0C\u0C0E-\u0C10\u0C12-\u0C28\u0C2A-\u0C39\u0C3D-\u0C44\u0C46-\u0C48\u0C4A-\u0C4D\u0C55\u0C56\u0C58\u0C59\u0C60-\u0C63\u0C66-\u0C6F\u0C81-\u0C83\u0C85-\u0C8C\u0C8E-\u0C90\u0C92-\u0CA8\u0CAA-\u0CB3\u0CB5-\u0CB9\u0CBC-\u0CC4\u0CC6-\u0CC8\u0CCA-\u0CCD\u0CD5\u0CD6\u0CDE\u0CE0-\u0CE3\u0CE6-\u0CEF\u0CF1\u0CF2\u0D01-\u0D03\u0D05-\u0D0C\u0D0E-\u0D10\u0D12-\u0D3A\u0D3D-\u0D44\u0D46-\u0D48\u0D4A-\u0D4E\u0D57\u0D60-\u0D63\u0D66-\u0D6F\u0D7A-\u0D7F\u0D82\u0D83\u0D85-\u0D96\u0D9A-\u0DB1\u0DB3-\u0DBB\u0DBD\u0DC0-\u0DC6\u0DCA\u0DCF-\u0DD4\u0DD6\u0DD8-\u0DDF\u0DE6-\u0DEF\u0DF2\u0DF3\u0E01-\u0E3A\u0E40-\u0E4E\u0E50-\u0E59\u0E81\u0E82\u0E84\u0E87\u0E88\u0E8A\u0E8D\u0E94-\u0E97\u0E99-\u0E9F\u0EA1-\u0EA3\u0EA5\u0EA7\u0EAA\u0EAB\u0EAD-\u0EB9\u0EBB-\u0EBD\u0EC0-\u0EC4\u0EC6\u0EC8-\u0ECD\u0ED0-\u0ED9\u0EDC-\u0EDF\u0F00\u0F18\u0F19\u0F20-\u0F29\u0F35\u0F37\u0F39\u0F3E-\u0F47\u0F49-\u0F6C\u0F71-\u0F84\u0F86-\u0F97\u0F99-\u0FBC\u0FC6\u1000-\u1049\u1050-\u109D\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\u135D-\u135F\u1380-\u138F\u13A0-\u13F4\u1401-\u166C\u166F-\u167F\u1681-\u169A\u16A0-\u16EA\u16EE-\u16F8\u1700-\u170C\u170E-\u1714\u1720-\u1734\u1740-\u1753\u1760-\u176C\u176E-\u1770\u1772\u1773\u1780-\u17D3\u17D7\u17DC\u17DD\u17E0-\u17E9\u180B-\u180D\u1810-\u1819\u1820-\u1877\u1880-\u18AA\u18B0-\u18F5\u1900-\u191E\u1920-\u192B\u1930-\u193B\u1946-\u196D\u1970-\u1974\u1980-\u19AB\u19B0-\u19C9\u19D0-\u19D9\u1A00-\u1A1B\u1A20-\u1A5E\u1A60-\u1A7C\u1A7F-\u1A89\u1A90-\u1A99\u1AA7\u1AB0-\u1ABD\u1B00-\u1B4B\u1B50-\u1B59\u1B6B-\u1B73\u1B80-\u1BF3\u1C00-\u1C37\u1C40-\u1C49\u1C4D-\u1C7D\u1CD0-\u1CD2\u1CD4-\u1CF6\u1CF8\u1CF9\u1D00-\u1DF5\u1DFC-\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\u200C\u200D\u203F\u2040\u2054\u2071\u207F\u2090-\u209C\u20D0-\u20DC\u20E1\u20E5-\u20F0\u2102\u2107\u210A-\u2113\u2115\u2119-\u211D\u2124\u2126\u2128\u212A-\u212D\u212F-\u2139\u213C-\u213F\u2145-\u2149\u214E\u2160-\u2188\u2C00-\u2C2E\u2C30-\u2C5E\u2C60-\u2CE4\u2CEB-\u2CF3\u2D00-\u2D25\u2D27\u2D2D\u2D30-\u2D67\u2D6F\u2D7F-\u2D96\u2DA0-\u2DA6\u2DA8-\u2DAE\u2DB0-\u2DB6\u2DB8-\u2DBE\u2DC0-\u2DC6\u2DC8-\u2DCE\u2DD0-\u2DD6\u2DD8-\u2DDE\u2DE0-\u2DFF\u2E2F\u3005-\u3007\u3021-\u302F\u3031-\u3035\u3038-\u303C\u3041-\u3096\u3099\u309A\u309D-\u309F\u30A1-\u30FA\u30FC-\u30FF\u3105-\u312D\u3131-\u318E\u31A0-\u31BA\u31F0-\u31FF\u3400-\u4DB5\u4E00-\u9FCC\uA000-\uA48C\uA4D0-\uA4FD\uA500-\uA60C\uA610-\uA62B\uA640-\uA66F\uA674-\uA67D\uA67F-\uA69D\uA69F-\uA6F1\uA717-\uA71F\uA722-\uA788\uA78B-\uA78E\uA790-\uA7AD\uA7B0\uA7B1\uA7F7-\uA827\uA840-\uA873\uA880-\uA8C4\uA8D0-\uA8D9\uA8E0-\uA8F7\uA8FB\uA900-\uA92D\uA930-\uA953\uA960-\uA97C\uA980-\uA9C0\uA9CF-\uA9D9\uA9E0-\uA9FE\uAA00-\uAA36\uAA40-\uAA4D\uAA50-\uAA59\uAA60-\uAA76\uAA7A-\uAAC2\uAADB-\uAADD\uAAE0-\uAAEF\uAAF2-\uAAF6\uAB01-\uAB06\uAB09-\uAB0E\uAB11-\uAB16\uAB20-\uAB26\uAB28-\uAB2E\uAB30-\uAB5A\uAB5C-\uAB5F\uAB64\uAB65\uABC0-\uABEA\uABEC\uABED\uABF0-\uABF9\uAC00-\uD7A3\uD7B0-\uD7C6\uD7CB-\uD7FB\uF900-\uFA6D\uFA70-\uFAD9\uFB00-\uFB06\uFB13-\uFB17\uFB1D-\uFB28\uFB2A-\uFB36\uFB38-\uFB3C\uFB3E\uFB40\uFB41\uFB43\uFB44\uFB46-\uFBB1\uFBD3-\uFD3D\uFD50-\uFD8F\uFD92-\uFDC7\uFDF0-\uFDFB\uFE00-\uFE0F\uFE20-\uFE2D\uFE33\uFE34\uFE4D-\uFE4F\uFE70-\uFE74\uFE76-\uFEFC\uFF10-\uFF19\uFF21-\uFF3A\uFF3F\uFF41-\uFF5A\uFF66-\uFFBE\uFFC2-\uFFC7\uFFCA-\uFFCF\uFFD2-\uFFD7\uFFDA-\uFFDC]'); + + return (ch === 36) || (ch === 95) || // $ (dollar) and _ (underscore) + (ch >= 65 && ch <= 90) || // A..Z + (ch >= 97 && ch <= 122) || // a..z + (ch >= 48 && ch <= 57) || // 0..9 + (ch === 92) || // \ (backslash) + ((ch >= 0x80) && NonAsciiIdentifierPart.test(String.fromCharCode(ch))); + } + + function parseIdentityEscape() { + // IdentityEscape :: + // SourceCharacter but not IdentifierPart + // <ZWJ> + // <ZWNJ> + + var ZWJ = '\u200C'; + var ZWNJ = '\u200D'; + + var tmp; + + if (!isIdentifierPart(lookahead())) { + tmp = incr(); + return createEscaped('identifier', tmp.charCodeAt(0), tmp, 1); + } + + if (match(ZWJ)) { + // <ZWJ> + return createEscaped('identifier', 0x200C, ZWJ); + } else if (match(ZWNJ)) { + // <ZWNJ> + return createEscaped('identifier', 0x200D, ZWNJ); + } + + return null; + } + + function parseCharacterClass() { + // CharacterClass :: + // [ [lookahead ∉ {^}] ClassRanges ] + // [ ^ ClassRanges ] + + var res, from = pos; + if (res = matchReg(/^\[\^/)) { + res = parseClassRanges(); + skip(']'); + return createCharacterClass(res, true, from, pos); + } else if (match('[')) { + res = parseClassRanges(); + skip(']'); + return createCharacterClass(res, false, from, pos); + } + + return null; + } + + function parseClassRanges() { + // ClassRanges :: + // [empty] + // NonemptyClassRanges + + var res; + if (current(']')) { + // Empty array means nothing insinde of the ClassRange. + return []; + } else { + res = parseNonemptyClassRanges(); + if (!res) { + bail('nonEmptyClassRanges'); + } + return res; + } + } + + function parseHelperClassRanges(atom) { + var from, to, res; + if (current('-') && !next(']')) { + // ClassAtom - ClassAtom ClassRanges + skip('-'); + + res = parseClassAtom(); + if (!res) { + bail('classAtom'); + } + to = pos; + var classRanges = parseClassRanges(); + if (!classRanges) { + bail('classRanges'); + } + from = atom.range[0]; + if (classRanges.type === 'empty') { + return [createClassRange(atom, res, from, to)]; + } + return [createClassRange(atom, res, from, to)].concat(classRanges); + } + + res = parseNonemptyClassRangesNoDash(); + if (!res) { + bail('nonEmptyClassRangesNoDash'); + } + + return [atom].concat(res); + } + + function parseNonemptyClassRanges() { + // NonemptyClassRanges :: + // ClassAtom + // ClassAtom NonemptyClassRangesNoDash + // ClassAtom - ClassAtom ClassRanges + + var atom = parseClassAtom(); + if (!atom) { + bail('classAtom'); + } + + if (current(']')) { + // ClassAtom + return [atom]; + } + + // ClassAtom NonemptyClassRangesNoDash + // ClassAtom - ClassAtom ClassRanges + return parseHelperClassRanges(atom); + } + + function parseNonemptyClassRangesNoDash() { + // NonemptyClassRangesNoDash :: + // ClassAtom + // ClassAtomNoDash NonemptyClassRangesNoDash + // ClassAtomNoDash - ClassAtom ClassRanges + + var res = parseClassAtom(); + if (!res) { + bail('classAtom'); + } + if (current(']')) { + // ClassAtom + return res; + } + + // ClassAtomNoDash NonemptyClassRangesNoDash + // ClassAtomNoDash - ClassAtom ClassRanges + return parseHelperClassRanges(res); + } + + function parseClassAtom() { + // ClassAtom :: + // - + // ClassAtomNoDash + if (match('-')) { + return createCharacter('-'); + } else { + return parseClassAtomNoDash(); + } + } + + function parseClassAtomNoDash() { + // ClassAtomNoDash :: + // SourceCharacter but not one of \ or ] or - + // \ ClassEscape + + var res; + if (res = matchReg(/^[^\\\]-]/)) { + return createCharacter(res[0]); + } else if (match('\\')) { + res = parseClassEscape(); + if (!res) { + bail('classEscape'); + } + + return parseUnicodeSurrogatePairEscape(res); + } + } + + 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 hasUnicodeFlag = (flags || "").indexOf("u") !== -1; + var pos = 0; + + // 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 + for (var i = 0; i < backrefDenied.length; i++) { + if (backrefDenied[i] <= closedCaptureCounter) { + // 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; + } + +}()); |