// 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

// ControlEscape // c ControlLetter // HexEscapeSequence // RegExpUnicodeEscapeSequence (ES6) // IdentityEscape //

// 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) {
  var hasUnicodeFlag = (flags || "").indexOf("u") !== -1;
  var pos = 0;
  var closedCaptureCounter = 0;

  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) {
      throw SyntaxError('invalid range in character class');
    }

    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)) {
      throw SyntaxError('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) {
      throw SyntaxError('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) {
      throw SyntaxError('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().
      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;
    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) {
        throw SyntaxError('numbers out of order in {} quantifier');
      }
      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) {
        throw SyntaxError('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;

    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')) {
        throw SyntaxError('\\B not possible inside of CharacterClass');
      }
    }

    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.

        // 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]{1,})\}/))) {
      // 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 res;
    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) {
        throw SyntaxError('nonEmptyClassRanges');
      }
      return res;
    }
  }

  function parseHelperClassRanges(atom) {
    var from, to, res;
    if (current('-') && !next(']')) {
      // ClassAtom - ClassAtom ClassRanges
      skip('-');

      res = parseClassAtom();
      if (!res) {
        throw SyntaxError('classAtom');
      }
      to = pos;
      var classRanges = parseClassRanges();
      if (!classRanges) {
        throw SyntaxError('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) {
      throw SyntaxError('nonEmptyClassRangesNoDash');
    }

    return [atom].concat(res);
  }

  function parseNonemptyClassRanges() {
    // NonemptyClassRanges ::
    //      ClassAtom
    //      ClassAtom NonemptyClassRangesNoDash
    //      ClassAtom - ClassAtom ClassRanges

    var atom = parseClassAtom();
    if (!atom) {
      throw SyntaxError('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) {
      throw SyntaxError('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) {
        throw SyntaxError('classEscape');
      }

      return parseUnicodeSurrogatePairEscape(res);
    }
  }

  // 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) {
    throw SyntaxError('Could not parse entire input - got stuck: ' + str);
  }

  return result;
};

var regjsparser = {
  parse: parse
};

if (typeof module !== 'undefined' && module.exports) {
  module.exports = regjsparser;
} else {
  window.regjsparser = regjsparser;
}

}());