// Generated by PEG.js v0.11.0-dev, https://pegjs.org/

/* eslint-disable */

"use strict";

var ast = require("./ast");
var util = require("./util");

function peg$subclass(child, parent) {
  function C() { this.constructor = child; }
  C.prototype = parent.prototype;
  child.prototype = new C();
}

function peg$SyntaxError(message, expected, found, location) {
  this.message = message;
  this.expected = expected;
  this.found = found;
  this.location = location;
  this.name = "SyntaxError";

  // istanbul ignore next
  if (typeof Error.captureStackTrace === "function") {
    Error.captureStackTrace(this, peg$SyntaxError);
  }
}

peg$subclass(peg$SyntaxError, Error);

peg$SyntaxError.buildMessage = function(expected, found) {
  var DESCRIBE_EXPECTATION_FNS = {
    literal: function(expectation) {
      return "\"" + literalEscape(expectation.text) + "\"";
    },

    class: function(expectation) {
      var escapedParts = expectation.parts.map(function(part) {
        return Array.isArray(part)
          ? classEscape(part[0]) + "-" + classEscape(part[1])
          : classEscape(part);
      });

      return "[" + (expectation.inverted ? "^" : "") + escapedParts + "]";
    },

    any: function() {
      return "any character";
    },

    end: function() {
      return "end of input";
    },

    other: function(expectation) {
      return expectation.description;
    },

    not: function(expectation) {
      return "not " + describeExpectation(expectation.expected);
    }
  };

  function hex(ch) {
    return ch.charCodeAt(0).toString(16).toUpperCase();
  }

  function literalEscape(s) {
    return s
      .replace(/\\/g, "\\\\")
      .replace(/"/g,  "\\\"")
      .replace(/\0/g, "\\0")
      .replace(/\t/g, "\\t")
      .replace(/\n/g, "\\n")
      .replace(/\r/g, "\\r")
      .replace(/[\x00-\x0F]/g,          function(ch) { return "\\x0" + hex(ch); })
      .replace(/[\x10-\x1F\x7F-\x9F]/g, function(ch) { return "\\x"  + hex(ch); });
  }

  function classEscape(s) {
    return s
      .replace(/\\/g, "\\\\")
      .replace(/\]/g, "\\]")
      .replace(/\^/g, "\\^")
      .replace(/-/g,  "\\-")
      .replace(/\0/g, "\\0")
      .replace(/\t/g, "\\t")
      .replace(/\n/g, "\\n")
      .replace(/\r/g, "\\r")
      .replace(/[\x00-\x0F]/g,          function(ch) { return "\\x0" + hex(ch); })
      .replace(/[\x10-\x1F\x7F-\x9F]/g, function(ch) { return "\\x"  + hex(ch); });
  }

  function describeExpectation(expectation) {
    return DESCRIBE_EXPECTATION_FNS[expectation.type](expectation);
  }

  function describeExpected(expected) {
    var descriptions = expected.map(describeExpectation);
    var i, j;

    descriptions.sort();

    if (descriptions.length > 0) {
      for (i = 1, j = 1; i < descriptions.length; i++) {
        if (descriptions[i - 1] !== descriptions[i]) {
          descriptions[j] = descriptions[i];
          j++;
        }
      }
      descriptions.length = j;
    }

    switch (descriptions.length) {
      case 1:
        return descriptions[0];

      case 2:
        return descriptions[0] + " or " + descriptions[1];

      default:
        return descriptions.slice(0, -1).join(", ")
          + ", or "
          + descriptions[descriptions.length - 1];
    }
  }

  function describeFound(found) {
    return found ? "\"" + literalEscape(found) + "\"" : "end of input";
  }

  return "Expected " + describeExpected(expected) + " but " + describeFound(found) + " found.";
};

function peg$parse(input, options) {
  options = options !== undefined ? options : {};

  var peg$FAILED = {};

  var peg$startRuleFunctions = { Grammar: peg$parseGrammar };
  var peg$startRuleFunction = peg$parseGrammar;

  var peg$c0 = "=";
  var peg$c1 = "/";
  var peg$c2 = ":";
  var peg$c3 = "$";
  var peg$c4 = "&";
  var peg$c5 = "!";
  var peg$c6 = "?";
  var peg$c7 = "*";
  var peg$c8 = "+";
  var peg$c9 = "(";
  var peg$c10 = ")";
  var peg$c11 = "\t";
  var peg$c12 = "\v";
  var peg$c13 = "\f";
  var peg$c14 = " ";
  var peg$c15 = "\xA0";
  var peg$c16 = "\uFEFF";
  var peg$c17 = "\n";
  var peg$c18 = "\r\n";
  var peg$c19 = "\r";
  var peg$c20 = "\u2028";
  var peg$c21 = "\u2029";
  var peg$c22 = "/*";
  var peg$c23 = "*/";
  var peg$c24 = "//";
  var peg$c25 = "_";
  var peg$c26 = "\\";
  var peg$c27 = "\u200C";
  var peg$c28 = "\u200D";
  var peg$c29 = "i";
  var peg$c30 = "\"";
  var peg$c31 = "'";
  var peg$c32 = "[";
  var peg$c33 = "^";
  var peg$c34 = "]";
  var peg$c35 = "-";
  var peg$c36 = "0";
  var peg$c37 = "b";
  var peg$c38 = "f";
  var peg$c39 = "n";
  var peg$c40 = "r";
  var peg$c41 = "t";
  var peg$c42 = "v";
  var peg$c43 = "x";
  var peg$c44 = "u";
  var peg$c45 = ".";
  var peg$c46 = "{";
  var peg$c47 = "}";
  var peg$c48 = ";";

  var peg$r0 = /^[\n\r\u2028\u2029]/;
  var peg$r1 = /^[0-9]/;
  var peg$r2 = /^[0-9a-f]/i;
  var peg$r3 = /^[{}]/;
  var peg$r4 = /^[a-z\xB5\xDF-\xF6\xF8-\xFF\u0101\u0103\u0105\u0107\u0109\u010B\u010D\u010F\u0111\u0113\u0115\u0117\u0119\u011B\u011D\u011F\u0121\u0123\u0125\u0127\u0129\u012B\u012D\u012F\u0131\u0133\u0135\u0137-\u0138\u013A\u013C\u013E\u0140\u0142\u0144\u0146\u0148-\u0149\u014B\u014D\u014F\u0151\u0153\u0155\u0157\u0159\u015B\u015D\u015F\u0161\u0163\u0165\u0167\u0169\u016B\u016D\u016F\u0171\u0173\u0175\u0177\u017A\u017C\u017E-\u0180\u0183\u0185\u0188\u018C-\u018D\u0192\u0195\u0199-\u019B\u019E\u01A1\u01A3\u01A5\u01A8\u01AA-\u01AB\u01AD\u01B0\u01B4\u01B6\u01B9-\u01BA\u01BD-\u01BF\u01C6\u01C9\u01CC\u01CE\u01D0\u01D2\u01D4\u01D6\u01D8\u01DA\u01DC-\u01DD\u01DF\u01E1\u01E3\u01E5\u01E7\u01E9\u01EB\u01ED\u01EF-\u01F0\u01F3\u01F5\u01F9\u01FB\u01FD\u01FF\u0201\u0203\u0205\u0207\u0209\u020B\u020D\u020F\u0211\u0213\u0215\u0217\u0219\u021B\u021D\u021F\u0221\u0223\u0225\u0227\u0229\u022B\u022D\u022F\u0231\u0233-\u0239\u023C\u023F-\u0240\u0242\u0247\u0249\u024B\u024D\u024F-\u0293\u0295-\u02AF\u0371\u0373\u0377\u037B-\u037D\u0390\u03AC-\u03CE\u03D0-\u03D1\u03D5-\u03D7\u03D9\u03DB\u03DD\u03DF\u03E1\u03E3\u03E5\u03E7\u03E9\u03EB\u03ED\u03EF-\u03F3\u03F5\u03F8\u03FB-\u03FC\u0430-\u045F\u0461\u0463\u0465\u0467\u0469\u046B\u046D\u046F\u0471\u0473\u0475\u0477\u0479\u047B\u047D\u047F\u0481\u048B\u048D\u048F\u0491\u0493\u0495\u0497\u0499\u049B\u049D\u049F\u04A1\u04A3\u04A5\u04A7\u04A9\u04AB\u04AD\u04AF\u04B1\u04B3\u04B5\u04B7\u04B9\u04BB\u04BD\u04BF\u04C2\u04C4\u04C6\u04C8\u04CA\u04CC\u04CE-\u04CF\u04D1\u04D3\u04D5\u04D7\u04D9\u04DB\u04DD\u04DF\u04E1\u04E3\u04E5\u04E7\u04E9\u04EB\u04ED\u04EF\u04F1\u04F3\u04F5\u04F7\u04F9\u04FB\u04FD\u04FF\u0501\u0503\u0505\u0507\u0509\u050B\u050D\u050F\u0511\u0513\u0515\u0517\u0519\u051B\u051D\u051F\u0521\u0523\u0525\u0527\u0529\u052B\u052D\u052F\u0561-\u0587\u13F8-\u13FD\u1D00-\u1D2B\u1D6B-\u1D77\u1D79-\u1D9A\u1E01\u1E03\u1E05\u1E07\u1E09\u1E0B\u1E0D\u1E0F\u1E11\u1E13\u1E15\u1E17\u1E19\u1E1B\u1E1D\u1E1F\u1E21\u1E23\u1E25\u1E27\u1E29\u1E2B\u1E2D\u1E2F\u1E31\u1E33\u1E35\u1E37\u1E39\u1E3B\u1E3D\u1E3F\u1E41\u1E43\u1E45\u1E47\u1E49\u1E4B\u1E4D\u1E4F\u1E51\u1E53\u1E55\u1E57\u1E59\u1E5B\u1E5D\u1E5F\u1E61\u1E63\u1E65\u1E67\u1E69\u1E6B\u1E6D\u1E6F\u1E71\u1E73\u1E75\u1E77\u1E79\u1E7B\u1E7D\u1E7F\u1E81\u1E83\u1E85\u1E87\u1E89\u1E8B\u1E8D\u1E8F\u1E91\u1E93\u1E95-\u1E9D\u1E9F\u1EA1\u1EA3\u1EA5\u1EA7\u1EA9\u1EAB\u1EAD\u1EAF\u1EB1\u1EB3\u1EB5\u1EB7\u1EB9\u1EBB\u1EBD\u1EBF\u1EC1\u1EC3\u1EC5\u1EC7\u1EC9\u1ECB\u1ECD\u1ECF\u1ED1\u1ED3\u1ED5\u1ED7\u1ED9\u1EDB\u1EDD\u1EDF\u1EE1\u1EE3\u1EE5\u1EE7\u1EE9\u1EEB\u1EED\u1EEF\u1EF1\u1EF3\u1EF5\u1EF7\u1EF9\u1EFB\u1EFD\u1EFF-\u1F07\u1F10-\u1F15\u1F20-\u1F27\u1F30-\u1F37\u1F40-\u1F45\u1F50-\u1F57\u1F60-\u1F67\u1F70-\u1F7D\u1F80-\u1F87\u1F90-\u1F97\u1FA0-\u1FA7\u1FB0-\u1FB4\u1FB6-\u1FB7\u1FBE\u1FC2-\u1FC4\u1FC6-\u1FC7\u1FD0-\u1FD3\u1FD6-\u1FD7\u1FE0-\u1FE7\u1FF2-\u1FF4\u1FF6-\u1FF7\u210A\u210E-\u210F\u2113\u212F\u2134\u2139\u213C-\u213D\u2146-\u2149\u214E\u2184\u2C30-\u2C5E\u2C61\u2C65-\u2C66\u2C68\u2C6A\u2C6C\u2C71\u2C73-\u2C74\u2C76-\u2C7B\u2C81\u2C83\u2C85\u2C87\u2C89\u2C8B\u2C8D\u2C8F\u2C91\u2C93\u2C95\u2C97\u2C99\u2C9B\u2C9D\u2C9F\u2CA1\u2CA3\u2CA5\u2CA7\u2CA9\u2CAB\u2CAD\u2CAF\u2CB1\u2CB3\u2CB5\u2CB7\u2CB9\u2CBB\u2CBD\u2CBF\u2CC1\u2CC3\u2CC5\u2CC7\u2CC9\u2CCB\u2CCD\u2CCF\u2CD1\u2CD3\u2CD5\u2CD7\u2CD9\u2CDB\u2CDD\u2CDF\u2CE1\u2CE3-\u2CE4\u2CEC\u2CEE\u2CF3\u2D00-\u2D25\u2D27\u2D2D\uA641\uA643\uA645\uA647\uA649\uA64B\uA64D\uA64F\uA651\uA653\uA655\uA657\uA659\uA65B\uA65D\uA65F\uA661\uA663\uA665\uA667\uA669\uA66B\uA66D\uA681\uA683\uA685\uA687\uA689\uA68B\uA68D\uA68F\uA691\uA693\uA695\uA697\uA699\uA69B\uA723\uA725\uA727\uA729\uA72B\uA72D\uA72F-\uA731\uA733\uA735\uA737\uA739\uA73B\uA73D\uA73F\uA741\uA743\uA745\uA747\uA749\uA74B\uA74D\uA74F\uA751\uA753\uA755\uA757\uA759\uA75B\uA75D\uA75F\uA761\uA763\uA765\uA767\uA769\uA76B\uA76D\uA76F\uA771-\uA778\uA77A\uA77C\uA77F\uA781\uA783\uA785\uA787\uA78C\uA78E\uA791\uA793-\uA795\uA797\uA799\uA79B\uA79D\uA79F\uA7A1\uA7A3\uA7A5\uA7A7\uA7A9\uA7B5\uA7B7\uA7FA\uAB30-\uAB5A\uAB60-\uAB65\uAB70-\uABBF\uFB00-\uFB06\uFB13-\uFB17\uFF41-\uFF5A]/;
  var peg$r5 = /^[\u02B0-\u02C1\u02C6-\u02D1\u02E0-\u02E4\u02EC\u02EE\u0374\u037A\u0559\u0640\u06E5-\u06E6\u07F4-\u07F5\u07FA\u081A\u0824\u0828\u0971\u0E46\u0EC6\u10FC\u17D7\u1843\u1AA7\u1C78-\u1C7D\u1D2C-\u1D6A\u1D78\u1D9B-\u1DBF\u2071\u207F\u2090-\u209C\u2C7C-\u2C7D\u2D6F\u2E2F\u3005\u3031-\u3035\u303B\u309D-\u309E\u30FC-\u30FE\uA015\uA4F8-\uA4FD\uA60C\uA67F\uA69C-\uA69D\uA717-\uA71F\uA770\uA788\uA7F8-\uA7F9\uA9CF\uA9E6\uAA70\uAADD\uAAF3-\uAAF4\uAB5C-\uAB5F\uFF70\uFF9E-\uFF9F]/;
  var peg$r6 = /^[\xAA\xBA\u01BB\u01C0-\u01C3\u0294\u05D0-\u05EA\u05F0-\u05F2\u0620-\u063F\u0641-\u064A\u066E-\u066F\u0671-\u06D3\u06D5\u06EE-\u06EF\u06FA-\u06FC\u06FF\u0710\u0712-\u072F\u074D-\u07A5\u07B1\u07CA-\u07EA\u0800-\u0815\u0840-\u0858\u08A0-\u08B4\u0904-\u0939\u093D\u0950\u0958-\u0961\u0972-\u0980\u0985-\u098C\u098F-\u0990\u0993-\u09A8\u09AA-\u09B0\u09B2\u09B6-\u09B9\u09BD\u09CE\u09DC-\u09DD\u09DF-\u09E1\u09F0-\u09F1\u0A05-\u0A0A\u0A0F-\u0A10\u0A13-\u0A28\u0A2A-\u0A30\u0A32-\u0A33\u0A35-\u0A36\u0A38-\u0A39\u0A59-\u0A5C\u0A5E\u0A72-\u0A74\u0A85-\u0A8D\u0A8F-\u0A91\u0A93-\u0AA8\u0AAA-\u0AB0\u0AB2-\u0AB3\u0AB5-\u0AB9\u0ABD\u0AD0\u0AE0-\u0AE1\u0AF9\u0B05-\u0B0C\u0B0F-\u0B10\u0B13-\u0B28\u0B2A-\u0B30\u0B32-\u0B33\u0B35-\u0B39\u0B3D\u0B5C-\u0B5D\u0B5F-\u0B61\u0B71\u0B83\u0B85-\u0B8A\u0B8E-\u0B90\u0B92-\u0B95\u0B99-\u0B9A\u0B9C\u0B9E-\u0B9F\u0BA3-\u0BA4\u0BA8-\u0BAA\u0BAE-\u0BB9\u0BD0\u0C05-\u0C0C\u0C0E-\u0C10\u0C12-\u0C28\u0C2A-\u0C39\u0C3D\u0C58-\u0C5A\u0C60-\u0C61\u0C85-\u0C8C\u0C8E-\u0C90\u0C92-\u0CA8\u0CAA-\u0CB3\u0CB5-\u0CB9\u0CBD\u0CDE\u0CE0-\u0CE1\u0CF1-\u0CF2\u0D05-\u0D0C\u0D0E-\u0D10\u0D12-\u0D3A\u0D3D\u0D4E\u0D5F-\u0D61\u0D7A-\u0D7F\u0D85-\u0D96\u0D9A-\u0DB1\u0DB3-\u0DBB\u0DBD\u0DC0-\u0DC6\u0E01-\u0E30\u0E32-\u0E33\u0E40-\u0E45\u0E81-\u0E82\u0E84\u0E87-\u0E88\u0E8A\u0E8D\u0E94-\u0E97\u0E99-\u0E9F\u0EA1-\u0EA3\u0EA5\u0EA7\u0EAA-\u0EAB\u0EAD-\u0EB0\u0EB2-\u0EB3\u0EBD\u0EC0-\u0EC4\u0EDC-\u0EDF\u0F00\u0F40-\u0F47\u0F49-\u0F6C\u0F88-\u0F8C\u1000-\u102A\u103F\u1050-\u1055\u105A-\u105D\u1061\u1065-\u1066\u106E-\u1070\u1075-\u1081\u108E\u10D0-\u10FA\u10FD-\u1248\u124A-\u124D\u1250-\u1256\u1258\u125A-\u125D\u1260-\u1288\u128A-\u128D\u1290-\u12B0\u12B2-\u12B5\u12B8-\u12BE\u12C0\u12C2-\u12C5\u12C8-\u12D6\u12D8-\u1310\u1312-\u1315\u1318-\u135A\u1380-\u138F\u1401-\u166C\u166F-\u167F\u1681-\u169A\u16A0-\u16EA\u16F1-\u16F8\u1700-\u170C\u170E-\u1711\u1720-\u1731\u1740-\u1751\u1760-\u176C\u176E-\u1770\u1780-\u17B3\u17DC\u1820-\u1842\u1844-\u1877\u1880-\u18A8\u18AA\u18B0-\u18F5\u1900-\u191E\u1950-\u196D\u1970-\u1974\u1980-\u19AB\u19B0-\u19C9\u1A00-\u1A16\u1A20-\u1A54\u1B05-\u1B33\u1B45-\u1B4B\u1B83-\u1BA0\u1BAE-\u1BAF\u1BBA-\u1BE5\u1C00-\u1C23\u1C4D-\u1C4F\u1C5A-\u1C77\u1CE9-\u1CEC\u1CEE-\u1CF1\u1CF5-\u1CF6\u2135-\u2138\u2D30-\u2D67\u2D80-\u2D96\u2DA0-\u2DA6\u2DA8-\u2DAE\u2DB0-\u2DB6\u2DB8-\u2DBE\u2DC0-\u2DC6\u2DC8-\u2DCE\u2DD0-\u2DD6\u2DD8-\u2DDE\u3006\u303C\u3041-\u3096\u309F\u30A1-\u30FA\u30FF\u3105-\u312D\u3131-\u318E\u31A0-\u31BA\u31F0-\u31FF\u3400-\u4DB5\u4E00-\u9FD5\uA000-\uA014\uA016-\uA48C\uA4D0-\uA4F7\uA500-\uA60B\uA610-\uA61F\uA62A-\uA62B\uA66E\uA6A0-\uA6E5\uA78F\uA7F7\uA7FB-\uA801\uA803-\uA805\uA807-\uA80A\uA80C-\uA822\uA840-\uA873\uA882-\uA8B3\uA8F2-\uA8F7\uA8FB\uA8FD\uA90A-\uA925\uA930-\uA946\uA960-\uA97C\uA984-\uA9B2\uA9E0-\uA9E4\uA9E7-\uA9EF\uA9FA-\uA9FE\uAA00-\uAA28\uAA40-\uAA42\uAA44-\uAA4B\uAA60-\uAA6F\uAA71-\uAA76\uAA7A\uAA7E-\uAAAF\uAAB1\uAAB5-\uAAB6\uAAB9-\uAABD\uAAC0\uAAC2\uAADB-\uAADC\uAAE0-\uAAEA\uAAF2\uAB01-\uAB06\uAB09-\uAB0E\uAB11-\uAB16\uAB20-\uAB26\uAB28-\uAB2E\uABC0-\uABE2\uAC00-\uD7A3\uD7B0-\uD7C6\uD7CB-\uD7FB\uF900-\uFA6D\uFA70-\uFAD9\uFB1D\uFB1F-\uFB28\uFB2A-\uFB36\uFB38-\uFB3C\uFB3E\uFB40-\uFB41\uFB43-\uFB44\uFB46-\uFBB1\uFBD3-\uFD3D\uFD50-\uFD8F\uFD92-\uFDC7\uFDF0-\uFDFB\uFE70-\uFE74\uFE76-\uFEFC\uFF66-\uFF6F\uFF71-\uFF9D\uFFA0-\uFFBE\uFFC2-\uFFC7\uFFCA-\uFFCF\uFFD2-\uFFD7\uFFDA-\uFFDC]/;
  var peg$r7 = /^[\u01C5\u01C8\u01CB\u01F2\u1F88-\u1F8F\u1F98-\u1F9F\u1FA8-\u1FAF\u1FBC\u1FCC\u1FFC]/;
  var peg$r8 = /^[A-Z\xC0-\xD6\xD8-\xDE\u0100\u0102\u0104\u0106\u0108\u010A\u010C\u010E\u0110\u0112\u0114\u0116\u0118\u011A\u011C\u011E\u0120\u0122\u0124\u0126\u0128\u012A\u012C\u012E\u0130\u0132\u0134\u0136\u0139\u013B\u013D\u013F\u0141\u0143\u0145\u0147\u014A\u014C\u014E\u0150\u0152\u0154\u0156\u0158\u015A\u015C\u015E\u0160\u0162\u0164\u0166\u0168\u016A\u016C\u016E\u0170\u0172\u0174\u0176\u0178-\u0179\u017B\u017D\u0181-\u0182\u0184\u0186-\u0187\u0189-\u018B\u018E-\u0191\u0193-\u0194\u0196-\u0198\u019C-\u019D\u019F-\u01A0\u01A2\u01A4\u01A6-\u01A7\u01A9\u01AC\u01AE-\u01AF\u01B1-\u01B3\u01B5\u01B7-\u01B8\u01BC\u01C4\u01C7\u01CA\u01CD\u01CF\u01D1\u01D3\u01D5\u01D7\u01D9\u01DB\u01DE\u01E0\u01E2\u01E4\u01E6\u01E8\u01EA\u01EC\u01EE\u01F1\u01F4\u01F6-\u01F8\u01FA\u01FC\u01FE\u0200\u0202\u0204\u0206\u0208\u020A\u020C\u020E\u0210\u0212\u0214\u0216\u0218\u021A\u021C\u021E\u0220\u0222\u0224\u0226\u0228\u022A\u022C\u022E\u0230\u0232\u023A-\u023B\u023D-\u023E\u0241\u0243-\u0246\u0248\u024A\u024C\u024E\u0370\u0372\u0376\u037F\u0386\u0388-\u038A\u038C\u038E-\u038F\u0391-\u03A1\u03A3-\u03AB\u03CF\u03D2-\u03D4\u03D8\u03DA\u03DC\u03DE\u03E0\u03E2\u03E4\u03E6\u03E8\u03EA\u03EC\u03EE\u03F4\u03F7\u03F9-\u03FA\u03FD-\u042F\u0460\u0462\u0464\u0466\u0468\u046A\u046C\u046E\u0470\u0472\u0474\u0476\u0478\u047A\u047C\u047E\u0480\u048A\u048C\u048E\u0490\u0492\u0494\u0496\u0498\u049A\u049C\u049E\u04A0\u04A2\u04A4\u04A6\u04A8\u04AA\u04AC\u04AE\u04B0\u04B2\u04B4\u04B6\u04B8\u04BA\u04BC\u04BE\u04C0-\u04C1\u04C3\u04C5\u04C7\u04C9\u04CB\u04CD\u04D0\u04D2\u04D4\u04D6\u04D8\u04DA\u04DC\u04DE\u04E0\u04E2\u04E4\u04E6\u04E8\u04EA\u04EC\u04EE\u04F0\u04F2\u04F4\u04F6\u04F8\u04FA\u04FC\u04FE\u0500\u0502\u0504\u0506\u0508\u050A\u050C\u050E\u0510\u0512\u0514\u0516\u0518\u051A\u051C\u051E\u0520\u0522\u0524\u0526\u0528\u052A\u052C\u052E\u0531-\u0556\u10A0-\u10C5\u10C7\u10CD\u13A0-\u13F5\u1E00\u1E02\u1E04\u1E06\u1E08\u1E0A\u1E0C\u1E0E\u1E10\u1E12\u1E14\u1E16\u1E18\u1E1A\u1E1C\u1E1E\u1E20\u1E22\u1E24\u1E26\u1E28\u1E2A\u1E2C\u1E2E\u1E30\u1E32\u1E34\u1E36\u1E38\u1E3A\u1E3C\u1E3E\u1E40\u1E42\u1E44\u1E46\u1E48\u1E4A\u1E4C\u1E4E\u1E50\u1E52\u1E54\u1E56\u1E58\u1E5A\u1E5C\u1E5E\u1E60\u1E62\u1E64\u1E66\u1E68\u1E6A\u1E6C\u1E6E\u1E70\u1E72\u1E74\u1E76\u1E78\u1E7A\u1E7C\u1E7E\u1E80\u1E82\u1E84\u1E86\u1E88\u1E8A\u1E8C\u1E8E\u1E90\u1E92\u1E94\u1E9E\u1EA0\u1EA2\u1EA4\u1EA6\u1EA8\u1EAA\u1EAC\u1EAE\u1EB0\u1EB2\u1EB4\u1EB6\u1EB8\u1EBA\u1EBC\u1EBE\u1EC0\u1EC2\u1EC4\u1EC6\u1EC8\u1ECA\u1ECC\u1ECE\u1ED0\u1ED2\u1ED4\u1ED6\u1ED8\u1EDA\u1EDC\u1EDE\u1EE0\u1EE2\u1EE4\u1EE6\u1EE8\u1EEA\u1EEC\u1EEE\u1EF0\u1EF2\u1EF4\u1EF6\u1EF8\u1EFA\u1EFC\u1EFE\u1F08-\u1F0F\u1F18-\u1F1D\u1F28-\u1F2F\u1F38-\u1F3F\u1F48-\u1F4D\u1F59\u1F5B\u1F5D\u1F5F\u1F68-\u1F6F\u1FB8-\u1FBB\u1FC8-\u1FCB\u1FD8-\u1FDB\u1FE8-\u1FEC\u1FF8-\u1FFB\u2102\u2107\u210B-\u210D\u2110-\u2112\u2115\u2119-\u211D\u2124\u2126\u2128\u212A-\u212D\u2130-\u2133\u213E-\u213F\u2145\u2183\u2C00-\u2C2E\u2C60\u2C62-\u2C64\u2C67\u2C69\u2C6B\u2C6D-\u2C70\u2C72\u2C75\u2C7E-\u2C80\u2C82\u2C84\u2C86\u2C88\u2C8A\u2C8C\u2C8E\u2C90\u2C92\u2C94\u2C96\u2C98\u2C9A\u2C9C\u2C9E\u2CA0\u2CA2\u2CA4\u2CA6\u2CA8\u2CAA\u2CAC\u2CAE\u2CB0\u2CB2\u2CB4\u2CB6\u2CB8\u2CBA\u2CBC\u2CBE\u2CC0\u2CC2\u2CC4\u2CC6\u2CC8\u2CCA\u2CCC\u2CCE\u2CD0\u2CD2\u2CD4\u2CD6\u2CD8\u2CDA\u2CDC\u2CDE\u2CE0\u2CE2\u2CEB\u2CED\u2CF2\uA640\uA642\uA644\uA646\uA648\uA64A\uA64C\uA64E\uA650\uA652\uA654\uA656\uA658\uA65A\uA65C\uA65E\uA660\uA662\uA664\uA666\uA668\uA66A\uA66C\uA680\uA682\uA684\uA686\uA688\uA68A\uA68C\uA68E\uA690\uA692\uA694\uA696\uA698\uA69A\uA722\uA724\uA726\uA728\uA72A\uA72C\uA72E\uA732\uA734\uA736\uA738\uA73A\uA73C\uA73E\uA740\uA742\uA744\uA746\uA748\uA74A\uA74C\uA74E\uA750\uA752\uA754\uA756\uA758\uA75A\uA75C\uA75E\uA760\uA762\uA764\uA766\uA768\uA76A\uA76C\uA76E\uA779\uA77B\uA77D-\uA77E\uA780\uA782\uA784\uA786\uA78B\uA78D\uA790\uA792\uA796\uA798\uA79A\uA79C\uA79E\uA7A0\uA7A2\uA7A4\uA7A6\uA7A8\uA7AA-\uA7AD\uA7B0-\uA7B4\uA7B6\uFF21-\uFF3A]/;
  var peg$r9 = /^[\u0903\u093B\u093E-\u0940\u0949-\u094C\u094E-\u094F\u0982-\u0983\u09BE-\u09C0\u09C7-\u09C8\u09CB-\u09CC\u09D7\u0A03\u0A3E-\u0A40\u0A83\u0ABE-\u0AC0\u0AC9\u0ACB-\u0ACC\u0B02-\u0B03\u0B3E\u0B40\u0B47-\u0B48\u0B4B-\u0B4C\u0B57\u0BBE-\u0BBF\u0BC1-\u0BC2\u0BC6-\u0BC8\u0BCA-\u0BCC\u0BD7\u0C01-\u0C03\u0C41-\u0C44\u0C82-\u0C83\u0CBE\u0CC0-\u0CC4\u0CC7-\u0CC8\u0CCA-\u0CCB\u0CD5-\u0CD6\u0D02-\u0D03\u0D3E-\u0D40\u0D46-\u0D48\u0D4A-\u0D4C\u0D57\u0D82-\u0D83\u0DCF-\u0DD1\u0DD8-\u0DDF\u0DF2-\u0DF3\u0F3E-\u0F3F\u0F7F\u102B-\u102C\u1031\u1038\u103B-\u103C\u1056-\u1057\u1062-\u1064\u1067-\u106D\u1083-\u1084\u1087-\u108C\u108F\u109A-\u109C\u17B6\u17BE-\u17C5\u17C7-\u17C8\u1923-\u1926\u1929-\u192B\u1930-\u1931\u1933-\u1938\u1A19-\u1A1A\u1A55\u1A57\u1A61\u1A63-\u1A64\u1A6D-\u1A72\u1B04\u1B35\u1B3B\u1B3D-\u1B41\u1B43-\u1B44\u1B82\u1BA1\u1BA6-\u1BA7\u1BAA\u1BE7\u1BEA-\u1BEC\u1BEE\u1BF2-\u1BF3\u1C24-\u1C2B\u1C34-\u1C35\u1CE1\u1CF2-\u1CF3\u302E-\u302F\uA823-\uA824\uA827\uA880-\uA881\uA8B4-\uA8C3\uA952-\uA953\uA983\uA9B4-\uA9B5\uA9BA-\uA9BB\uA9BD-\uA9C0\uAA2F-\uAA30\uAA33-\uAA34\uAA4D\uAA7B\uAA7D\uAAEB\uAAEE-\uAAEF\uAAF5\uABE3-\uABE4\uABE6-\uABE7\uABE9-\uABEA\uABEC]/;
  var peg$r10 = /^[\u0300-\u036F\u0483-\u0487\u0591-\u05BD\u05BF\u05C1-\u05C2\u05C4-\u05C5\u05C7\u0610-\u061A\u064B-\u065F\u0670\u06D6-\u06DC\u06DF-\u06E4\u06E7-\u06E8\u06EA-\u06ED\u0711\u0730-\u074A\u07A6-\u07B0\u07EB-\u07F3\u0816-\u0819\u081B-\u0823\u0825-\u0827\u0829-\u082D\u0859-\u085B\u08E3-\u0902\u093A\u093C\u0941-\u0948\u094D\u0951-\u0957\u0962-\u0963\u0981\u09BC\u09C1-\u09C4\u09CD\u09E2-\u09E3\u0A01-\u0A02\u0A3C\u0A41-\u0A42\u0A47-\u0A48\u0A4B-\u0A4D\u0A51\u0A70-\u0A71\u0A75\u0A81-\u0A82\u0ABC\u0AC1-\u0AC5\u0AC7-\u0AC8\u0ACD\u0AE2-\u0AE3\u0B01\u0B3C\u0B3F\u0B41-\u0B44\u0B4D\u0B56\u0B62-\u0B63\u0B82\u0BC0\u0BCD\u0C00\u0C3E-\u0C40\u0C46-\u0C48\u0C4A-\u0C4D\u0C55-\u0C56\u0C62-\u0C63\u0C81\u0CBC\u0CBF\u0CC6\u0CCC-\u0CCD\u0CE2-\u0CE3\u0D01\u0D41-\u0D44\u0D4D\u0D62-\u0D63\u0DCA\u0DD2-\u0DD4\u0DD6\u0E31\u0E34-\u0E3A\u0E47-\u0E4E\u0EB1\u0EB4-\u0EB9\u0EBB-\u0EBC\u0EC8-\u0ECD\u0F18-\u0F19\u0F35\u0F37\u0F39\u0F71-\u0F7E\u0F80-\u0F84\u0F86-\u0F87\u0F8D-\u0F97\u0F99-\u0FBC\u0FC6\u102D-\u1030\u1032-\u1037\u1039-\u103A\u103D-\u103E\u1058-\u1059\u105E-\u1060\u1071-\u1074\u1082\u1085-\u1086\u108D\u109D\u135D-\u135F\u1712-\u1714\u1732-\u1734\u1752-\u1753\u1772-\u1773\u17B4-\u17B5\u17B7-\u17BD\u17C6\u17C9-\u17D3\u17DD\u180B-\u180D\u18A9\u1920-\u1922\u1927-\u1928\u1932\u1939-\u193B\u1A17-\u1A18\u1A1B\u1A56\u1A58-\u1A5E\u1A60\u1A62\u1A65-\u1A6C\u1A73-\u1A7C\u1A7F\u1AB0-\u1ABD\u1B00-\u1B03\u1B34\u1B36-\u1B3A\u1B3C\u1B42\u1B6B-\u1B73\u1B80-\u1B81\u1BA2-\u1BA5\u1BA8-\u1BA9\u1BAB-\u1BAD\u1BE6\u1BE8-\u1BE9\u1BED\u1BEF-\u1BF1\u1C2C-\u1C33\u1C36-\u1C37\u1CD0-\u1CD2\u1CD4-\u1CE0\u1CE2-\u1CE8\u1CED\u1CF4\u1CF8-\u1CF9\u1DC0-\u1DF5\u1DFC-\u1DFF\u20D0-\u20DC\u20E1\u20E5-\u20F0\u2CEF-\u2CF1\u2D7F\u2DE0-\u2DFF\u302A-\u302D\u3099-\u309A\uA66F\uA674-\uA67D\uA69E-\uA69F\uA6F0-\uA6F1\uA802\uA806\uA80B\uA825-\uA826\uA8C4\uA8E0-\uA8F1\uA926-\uA92D\uA947-\uA951\uA980-\uA982\uA9B3\uA9B6-\uA9B9\uA9BC\uA9E5\uAA29-\uAA2E\uAA31-\uAA32\uAA35-\uAA36\uAA43\uAA4C\uAA7C\uAAB0\uAAB2-\uAAB4\uAAB7-\uAAB8\uAABE-\uAABF\uAAC1\uAAEC-\uAAED\uAAF6\uABE5\uABE8\uABED\uFB1E\uFE00-\uFE0F\uFE20-\uFE2F]/;
  var peg$r11 = /^[0-9\u0660-\u0669\u06F0-\u06F9\u07C0-\u07C9\u0966-\u096F\u09E6-\u09EF\u0A66-\u0A6F\u0AE6-\u0AEF\u0B66-\u0B6F\u0BE6-\u0BEF\u0C66-\u0C6F\u0CE6-\u0CEF\u0D66-\u0D6F\u0DE6-\u0DEF\u0E50-\u0E59\u0ED0-\u0ED9\u0F20-\u0F29\u1040-\u1049\u1090-\u1099\u17E0-\u17E9\u1810-\u1819\u1946-\u194F\u19D0-\u19D9\u1A80-\u1A89\u1A90-\u1A99\u1B50-\u1B59\u1BB0-\u1BB9\u1C40-\u1C49\u1C50-\u1C59\uA620-\uA629\uA8D0-\uA8D9\uA900-\uA909\uA9D0-\uA9D9\uA9F0-\uA9F9\uAA50-\uAA59\uABF0-\uABF9\uFF10-\uFF19]/;
  var peg$r12 = /^[\u16EE-\u16F0\u2160-\u2182\u2185-\u2188\u3007\u3021-\u3029\u3038-\u303A\uA6E6-\uA6EF]/;
  var peg$r13 = /^[_\u203F-\u2040\u2054\uFE33-\uFE34\uFE4D-\uFE4F\uFF3F]/;
  var peg$r14 = /^[ \xA0\u1680\u2000-\u200A\u202F\u205F\u3000]/;

  var peg$e0 = peg$literalExpectation("=", false);
  var peg$e1 = peg$literalExpectation("/", false);
  var peg$e2 = peg$literalExpectation(":", false);
  var peg$e3 = peg$literalExpectation("$", false);
  var peg$e4 = peg$literalExpectation("&", false);
  var peg$e5 = peg$literalExpectation("!", false);
  var peg$e6 = peg$literalExpectation("?", false);
  var peg$e7 = peg$literalExpectation("*", false);
  var peg$e8 = peg$literalExpectation("+", false);
  var peg$e9 = peg$literalExpectation("(", false);
  var peg$e10 = peg$literalExpectation(")", false);
  var peg$e11 = peg$anyExpectation();
  var peg$e12 = peg$otherExpectation("whitespace");
  var peg$e13 = peg$classExpectation(["\n", "\r", "\u2028", "\u2029"], false, false);
  var peg$e14 = peg$otherExpectation("end of line");
  var peg$e15 = peg$otherExpectation("comment");
  var peg$e16 = peg$literalExpectation("/*", false);
  var peg$e17 = peg$literalExpectation("*/", false);
  var peg$e18 = peg$literalExpectation("//", false);
  var peg$e19 = peg$otherExpectation("identifier");
  var peg$e20 = peg$otherExpectation("literal");
  var peg$e21 = peg$otherExpectation("string");
  var peg$e22 = peg$otherExpectation("character class");
  var peg$e23 = peg$literalExpectation(".", false);
  var peg$e24 = peg$otherExpectation("code block");
  var peg$e25 = peg$literalExpectation(";", false);

  var peg$f0 = function(initializer, rules) {
        return new ast.Grammar(
          extractOptional(initializer, 0),
          extractList(rules, 0),
          comments,
          location()
        );
      };
  var peg$f1 = function(code) {
        return createNode( "initializer", { code: code } );
      };
  var peg$f2 = function(name, displayName, expression) {
        return createNode( "rule", {
          name: name,
          expression: displayName !== null
            ? createNode( "named", {
                name: displayName[0],
                expression: expression,
              } )
            : expression,
        } );
      };
  var peg$f3 = function(head, tail) {
        return tail.length > 0
          ? createNode( "choice", {
              alternatives: buildList(head, tail, 3),
            } )
          : head;
      };
  var peg$f4 = function(expression, code) {
        return code !== null
          ? createNode( "action", {
              expression: expression,
              code: code[1],
            } )
          : expression;
      };
  var peg$f5 = function(head, tail) {
        return tail.length > 0
          ? createNode( "sequence", {
              elements: buildList(head, tail, 1),
            } )
          : head;
      };
  var peg$f6 = function(label, expression) {
        if (RESERVED_WORDS.indexOf(label[0]) >= 0) {
          error(`Label can't be a reserved word "${label[0]}".`, label[1]);
        }

        return createNode( "labeled", {
          label: label[0],
          expression: expression,
        } );
      };
  var peg$f7 = function(operator, expression) {
        return createNode( OPS_TO_PREFIXED_TYPES[operator], {
          expression: expression,
        } );
      };
  var peg$f8 = function(expression, operator) {
        return createNode( OPS_TO_SUFFIXED_TYPES[operator], {
          expression: expression,
        } );
      };
  var peg$f9 = function(expression) {
        // The purpose of the "group" AST node is just to isolate label scope. We
        // don't need to put it around nodes that can't contain any labels or
        // nodes that already isolate label scope themselves. This leaves us with
        // "labeled" and "sequence".
        return expression.type === "labeled" || expression.type === "sequence"
            ? createNode( "group", { expression: expression } )
            : expression;
      };
  var peg$f10 = function(name) {
        return createNode( "rule_ref", { name: name } );
      };
  var peg$f11 = function(operator, code) {
        return createNode( OPS_TO_SEMANTIC_PREDICATE_TYPES[operator], { code: code } );
      };
  var peg$f12 = function(comment) {
      return addComment(comment, true);
    };
  var peg$f13 = function(comment) {
      return addComment(comment, false);
    };
  var peg$f14 = function(name) { return [name, location()]; };
  var peg$f15 = function(head, tail) { return head + tail.join(""); };
  var peg$f16 = function(sequence) { return sequence; };
  var peg$f17 = function(value, ignoreCase) {
        return createNode( "literal", {
          value: value,
          ignoreCase: ignoreCase !== null,
        } );
      };
  var peg$f18 = function(chars) { return chars.join(""); };
  var peg$f19 = function() { return text(); };
  var peg$f20 = function(inverted, parts, ignoreCase) {
        return createNode( "class", {
          parts: parts.filter(part => part !== ""),
          inverted: inverted !== null,
          ignoreCase: ignoreCase !== null,
        } );
      };
  var peg$f21 = function(begin, end) {
        if (begin.charCodeAt(0) > end.charCodeAt(0)) {
          error(
            "Invalid character range: " + text() + "."
          );
        }

        return [begin, end];
      };
  var peg$f22 = function() { return ""; };
  var peg$f23 = function() { return "\0"; };
  var peg$f24 = function() { return "\b"; };
  var peg$f25 = function() { return "\f"; };
  var peg$f26 = function() { return "\n"; };
  var peg$f27 = function() { return "\r"; };
  var peg$f28 = function() { return "\t"; };
  var peg$f29 = function() { return "\v"; };
  var peg$f30 = function(digits) {
        return String.fromCharCode(parseInt(digits, 16));
      };
  var peg$f31 = function() { return createNode( "any", {} ); };
  var peg$f32 = function(code) { return code; };
  var peg$f33 = function() { error("Unbalanced brace."); };

  var peg$currPos = 0;
  var peg$savedPos = 0;
  var peg$posDetailsCache = [{ line: 1, column: 1 }];
  var peg$expected = [];
  var peg$silentFails = 0;

  var peg$result;

  if ("startRule" in options) {
    if (!(options.startRule in peg$startRuleFunctions)) {
      throw new Error("Can't start parsing from rule \"" + options.startRule + "\".");
    }

    peg$startRuleFunction = peg$startRuleFunctions[options.startRule];
  }

  function text() {
    return input.substring(peg$savedPos, peg$currPos);
  }

  function offset() {
    return peg$savedPos;
  }

  function range() {
    return [peg$savedPos, peg$currPos];
  }

  function location() {
    return peg$computeLocation(peg$savedPos, peg$currPos);
  }

  function expected(description, location) {
    location = location !== undefined
      ? location
      : peg$computeLocation(peg$savedPos, peg$currPos);

    throw peg$buildStructuredError(
      [peg$otherExpectation(description)],
      input.substring(peg$savedPos, peg$currPos),
      location
    );
  }

  function error(message, location) {
    location = location !== undefined
      ? location
      : peg$computeLocation(peg$savedPos, peg$currPos);

    throw peg$buildSimpleError(message, location);
  }

  function peg$literalExpectation(text, ignoreCase) {
    return { type: "literal", text: text, ignoreCase: ignoreCase };
  }

  function peg$classExpectation(parts, inverted, ignoreCase) {
    return { type: "class", parts: parts, inverted: inverted, ignoreCase: ignoreCase };
  }

  function peg$anyExpectation() {
    return { type: "any" };
  }

  function peg$endExpectation() {
    return { type: "end" };
  }

  function peg$otherExpectation(description) {
    return { type: "other", description: description };
  }

  function peg$computePosDetails(pos) {
    var details = peg$posDetailsCache[pos];
    var p;

    if (details) {
      return details;
    } else {
      p = pos - 1;
      while (!peg$posDetailsCache[p]) {
        p--;
      }

      details = peg$posDetailsCache[p];
      details = {
        line: details.line,
        column: details.column
      };

      while (p < pos) {
        if (input.charCodeAt(p) === 10) {
          details.line++;
          details.column = 1;
        } else {
          details.column++;
        }

        p++;
      }

      peg$posDetailsCache[pos] = details;

      return details;
    }
  }

  function peg$computeLocation(startPos, endPos) {
    var startPosDetails = peg$computePosDetails(startPos);
    var endPosDetails = peg$computePosDetails(endPos);

    return {
      start: {
        offset: startPos,
        line: startPosDetails.line,
        column: startPosDetails.column
      },
      end: {
        offset: endPos,
        line: endPosDetails.line,
        column: endPosDetails.column
      }
    };
  }

  function peg$begin() {
    peg$expected.push({ pos: peg$currPos, variants: [] });
  }

  function peg$expect(expected) {
    var top = peg$expected[peg$expected.length - 1];

    if (peg$currPos < top.pos) { return; }

    if (peg$currPos > top.pos) {
      top.pos = peg$currPos;
      top.variants = [];
    }

    top.variants.push(expected);
  }

  function peg$end(invert) {
    var expected = peg$expected.pop();
    var top = peg$expected[peg$expected.length - 1];
    var variants = expected.variants;

    if (top.pos !== expected.pos) { return; }

    if (invert) {
      variants = variants.map(function(e) {
        return e.type === "not" ? e.expected : { type: "not", expected: e };
      });
    }

    Array.prototype.push.apply(top.variants, variants);
  }

  function peg$buildSimpleError(message, location) {
    return new peg$SyntaxError(message, null, null, location);
  }

  function peg$buildStructuredError(expected, found, location) {
    return new peg$SyntaxError(
      peg$SyntaxError.buildMessage(expected, found),
      expected,
      found,
      location
    );
  }

  function peg$buildError() {
    var expected = peg$expected[0];
    var failPos = expected.pos;

    return peg$buildStructuredError(
      expected.variants,
      failPos < input.length ? input.charAt(failPos) : null,
      failPos < input.length
        ? peg$computeLocation(failPos, failPos + 1)
        : peg$computeLocation(failPos, failPos)
    );
  }

  function peg$parseGrammar() {
    var s0, s1, s2, s3, s4, s5, s6;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    s0 = peg$currPos;
    s1 = peg$parse__();
    s2 = peg$currPos;
    s3 = peg$parseInitializer();
    if (s3 !== peg$FAILED) {
      s4 = peg$parse__();
      s3 = [s3, s4];
      s2 = s3;
    } else {
      peg$currPos = s2;
      s2 = peg$FAILED;
    }
    if (s2 === peg$FAILED) {
      s2 = null;
    }
    s3 = [];
    s4 = peg$currPos;
    s5 = peg$parseRule();
    if (s5 !== peg$FAILED) {
      s6 = peg$parse__();
      s5 = [s5, s6];
      s4 = s5;
    } else {
      peg$currPos = s4;
      s4 = peg$FAILED;
    }
    if (s4 !== peg$FAILED) {
      while (s4 !== peg$FAILED) {
        s3.push(s4);
        s4 = peg$currPos;
        s5 = peg$parseRule();
        if (s5 !== peg$FAILED) {
          s6 = peg$parse__();
          s5 = [s5, s6];
          s4 = s5;
        } else {
          peg$currPos = s4;
          s4 = peg$FAILED;
        }
      }
    } else {
      s3 = peg$FAILED;
    }
    if (s3 !== peg$FAILED) {
      peg$savedPos = s0;
      s0 = peg$f0(s2, s3);
    } else {
      peg$currPos = s0;
      s0 = peg$FAILED;
    }

    return s0;
  }

  function peg$parseInitializer() {
    var s0, s1, s2;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    s0 = peg$currPos;
    s1 = peg$parseCodeBlock();
    if (s1 !== peg$FAILED) {
      s2 = peg$parseEOS();
      if (s2 !== peg$FAILED) {
        peg$savedPos = s0;
        s0 = peg$f1(s1);
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }
    } else {
      peg$currPos = s0;
      s0 = peg$FAILED;
    }

    return s0;
  }

  function peg$parseRule() {
    var s0, s1, s2, s3, s4, s5, s6, s7;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    s0 = peg$currPos;
    s1 = peg$parseIdentifierName();
    if (s1 !== peg$FAILED) {
      s2 = peg$parse__();
      s3 = peg$currPos;
      s4 = peg$parseStringLiteral();
      if (s4 !== peg$FAILED) {
        s5 = peg$parse__();
        s4 = [s4, s5];
        s3 = s4;
      } else {
        peg$currPos = s3;
        s3 = peg$FAILED;
      }
      if (s3 === peg$FAILED) {
        s3 = null;
      }
      rule$expects(peg$e0);
      if (input.charCodeAt(peg$currPos) === 61) {
        s4 = peg$c0;
        peg$currPos++;
      } else {
        s4 = peg$FAILED;
      }
      if (s4 !== peg$FAILED) {
        s5 = peg$parse__();
        s6 = peg$parseChoiceExpression();
        if (s6 !== peg$FAILED) {
          s7 = peg$parseEOS();
          if (s7 !== peg$FAILED) {
            peg$savedPos = s0;
            s0 = peg$f2(s1, s3, s6);
          } else {
            peg$currPos = s0;
            s0 = peg$FAILED;
          }
        } else {
          peg$currPos = s0;
          s0 = peg$FAILED;
        }
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }
    } else {
      peg$currPos = s0;
      s0 = peg$FAILED;
    }

    return s0;
  }

  function peg$parseChoiceExpression() {
    var s0, s1, s2, s3, s4, s5, s6, s7;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    s0 = peg$currPos;
    s1 = peg$parseActionExpression();
    if (s1 !== peg$FAILED) {
      s2 = [];
      s3 = peg$currPos;
      s4 = peg$parse__();
      rule$expects(peg$e1);
      if (input.charCodeAt(peg$currPos) === 47) {
        s5 = peg$c1;
        peg$currPos++;
      } else {
        s5 = peg$FAILED;
      }
      if (s5 !== peg$FAILED) {
        s6 = peg$parse__();
        s7 = peg$parseActionExpression();
        if (s7 !== peg$FAILED) {
          s4 = [s4, s5, s6, s7];
          s3 = s4;
        } else {
          peg$currPos = s3;
          s3 = peg$FAILED;
        }
      } else {
        peg$currPos = s3;
        s3 = peg$FAILED;
      }
      while (s3 !== peg$FAILED) {
        s2.push(s3);
        s3 = peg$currPos;
        s4 = peg$parse__();
        rule$expects(peg$e1);
        if (input.charCodeAt(peg$currPos) === 47) {
          s5 = peg$c1;
          peg$currPos++;
        } else {
          s5 = peg$FAILED;
        }
        if (s5 !== peg$FAILED) {
          s6 = peg$parse__();
          s7 = peg$parseActionExpression();
          if (s7 !== peg$FAILED) {
            s4 = [s4, s5, s6, s7];
            s3 = s4;
          } else {
            peg$currPos = s3;
            s3 = peg$FAILED;
          }
        } else {
          peg$currPos = s3;
          s3 = peg$FAILED;
        }
      }
      peg$savedPos = s0;
      s0 = peg$f3(s1, s2);
    } else {
      peg$currPos = s0;
      s0 = peg$FAILED;
    }

    return s0;
  }

  function peg$parseActionExpression() {
    var s0, s1, s2, s3, s4;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    s0 = peg$currPos;
    s1 = peg$parseSequenceExpression();
    if (s1 !== peg$FAILED) {
      s2 = peg$currPos;
      s3 = peg$parse__();
      s4 = peg$parseCodeBlock();
      if (s4 !== peg$FAILED) {
        s3 = [s3, s4];
        s2 = s3;
      } else {
        peg$currPos = s2;
        s2 = peg$FAILED;
      }
      if (s2 === peg$FAILED) {
        s2 = null;
      }
      peg$savedPos = s0;
      s0 = peg$f4(s1, s2);
    } else {
      peg$currPos = s0;
      s0 = peg$FAILED;
    }

    return s0;
  }

  function peg$parseSequenceExpression() {
    var s0, s1, s2, s3, s4, s5;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    s0 = peg$currPos;
    s1 = peg$parseLabeledExpression();
    if (s1 !== peg$FAILED) {
      s2 = [];
      s3 = peg$currPos;
      s4 = peg$parse__();
      s5 = peg$parseLabeledExpression();
      if (s5 !== peg$FAILED) {
        s4 = [s4, s5];
        s3 = s4;
      } else {
        peg$currPos = s3;
        s3 = peg$FAILED;
      }
      while (s3 !== peg$FAILED) {
        s2.push(s3);
        s3 = peg$currPos;
        s4 = peg$parse__();
        s5 = peg$parseLabeledExpression();
        if (s5 !== peg$FAILED) {
          s4 = [s4, s5];
          s3 = s4;
        } else {
          peg$currPos = s3;
          s3 = peg$FAILED;
        }
      }
      peg$savedPos = s0;
      s0 = peg$f5(s1, s2);
    } else {
      peg$currPos = s0;
      s0 = peg$FAILED;
    }

    return s0;
  }

  function peg$parseLabeledExpression() {
    var s0, s1, s2, s3, s4, s5;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    s0 = peg$currPos;
    s1 = peg$parseIdentifier();
    if (s1 !== peg$FAILED) {
      s2 = peg$parse__();
      rule$expects(peg$e2);
      if (input.charCodeAt(peg$currPos) === 58) {
        s3 = peg$c2;
        peg$currPos++;
      } else {
        s3 = peg$FAILED;
      }
      if (s3 !== peg$FAILED) {
        s4 = peg$parse__();
        s5 = peg$parsePrefixedExpression();
        if (s5 !== peg$FAILED) {
          peg$savedPos = s0;
          s0 = peg$f6(s1, s5);
        } else {
          peg$currPos = s0;
          s0 = peg$FAILED;
        }
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }
    } else {
      peg$currPos = s0;
      s0 = peg$FAILED;
    }
    if (s0 === peg$FAILED) {
      s0 = peg$parsePrefixedExpression();
    }

    return s0;
  }

  function peg$parsePrefixedExpression() {
    var s0, s1, s2, s3;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    s0 = peg$currPos;
    s1 = peg$parsePrefixedOperator();
    if (s1 !== peg$FAILED) {
      s2 = peg$parse__();
      s3 = peg$parseSuffixedExpression();
      if (s3 !== peg$FAILED) {
        peg$savedPos = s0;
        s0 = peg$f7(s1, s3);
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }
    } else {
      peg$currPos = s0;
      s0 = peg$FAILED;
    }
    if (s0 === peg$FAILED) {
      s0 = peg$parseSuffixedExpression();
    }

    return s0;
  }

  function peg$parsePrefixedOperator() {
    var s0;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    rule$expects(peg$e3);
    if (input.charCodeAt(peg$currPos) === 36) {
      s0 = peg$c3;
      peg$currPos++;
    } else {
      s0 = peg$FAILED;
    }
    if (s0 === peg$FAILED) {
      rule$expects(peg$e4);
      if (input.charCodeAt(peg$currPos) === 38) {
        s0 = peg$c4;
        peg$currPos++;
      } else {
        s0 = peg$FAILED;
      }
      if (s0 === peg$FAILED) {
        rule$expects(peg$e5);
        if (input.charCodeAt(peg$currPos) === 33) {
          s0 = peg$c5;
          peg$currPos++;
        } else {
          s0 = peg$FAILED;
        }
      }
    }

    return s0;
  }

  function peg$parseSuffixedExpression() {
    var s0, s1, s2, s3;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    s0 = peg$currPos;
    s1 = peg$parsePrimaryExpression();
    if (s1 !== peg$FAILED) {
      s2 = peg$parse__();
      s3 = peg$parseSuffixedOperator();
      if (s3 !== peg$FAILED) {
        peg$savedPos = s0;
        s0 = peg$f8(s1, s3);
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }
    } else {
      peg$currPos = s0;
      s0 = peg$FAILED;
    }
    if (s0 === peg$FAILED) {
      s0 = peg$parsePrimaryExpression();
    }

    return s0;
  }

  function peg$parseSuffixedOperator() {
    var s0;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    rule$expects(peg$e6);
    if (input.charCodeAt(peg$currPos) === 63) {
      s0 = peg$c6;
      peg$currPos++;
    } else {
      s0 = peg$FAILED;
    }
    if (s0 === peg$FAILED) {
      rule$expects(peg$e7);
      if (input.charCodeAt(peg$currPos) === 42) {
        s0 = peg$c7;
        peg$currPos++;
      } else {
        s0 = peg$FAILED;
      }
      if (s0 === peg$FAILED) {
        rule$expects(peg$e8);
        if (input.charCodeAt(peg$currPos) === 43) {
          s0 = peg$c8;
          peg$currPos++;
        } else {
          s0 = peg$FAILED;
        }
      }
    }

    return s0;
  }

  function peg$parsePrimaryExpression() {
    var s0, s1, s2, s3, s4, s5;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    s0 = peg$parseLiteralMatcher();
    if (s0 === peg$FAILED) {
      s0 = peg$parseCharacterClassMatcher();
      if (s0 === peg$FAILED) {
        s0 = peg$parseAnyMatcher();
        if (s0 === peg$FAILED) {
          s0 = peg$parseRuleReferenceExpression();
          if (s0 === peg$FAILED) {
            s0 = peg$parseSemanticPredicateExpression();
            if (s0 === peg$FAILED) {
              s0 = peg$currPos;
              rule$expects(peg$e9);
              if (input.charCodeAt(peg$currPos) === 40) {
                s1 = peg$c9;
                peg$currPos++;
              } else {
                s1 = peg$FAILED;
              }
              if (s1 !== peg$FAILED) {
                s2 = peg$parse__();
                s3 = peg$parseChoiceExpression();
                if (s3 !== peg$FAILED) {
                  s4 = peg$parse__();
                  rule$expects(peg$e10);
                  if (input.charCodeAt(peg$currPos) === 41) {
                    s5 = peg$c10;
                    peg$currPos++;
                  } else {
                    s5 = peg$FAILED;
                  }
                  if (s5 !== peg$FAILED) {
                    peg$savedPos = s0;
                    s0 = peg$f9(s3);
                  } else {
                    peg$currPos = s0;
                    s0 = peg$FAILED;
                  }
                } else {
                  peg$currPos = s0;
                  s0 = peg$FAILED;
                }
              } else {
                peg$currPos = s0;
                s0 = peg$FAILED;
              }
            }
          }
        }
      }
    }

    return s0;
  }

  function peg$parseRuleReferenceExpression() {
    var s0, s1, s2, s3, s4, s5, s6, s7;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    s0 = peg$currPos;
    s1 = peg$parseIdentifierName();
    if (s1 !== peg$FAILED) {
      s2 = peg$currPos;
      peg$begin();
      s3 = peg$currPos;
      s4 = peg$parse__();
      s5 = peg$currPos;
      s6 = peg$parseStringLiteral();
      if (s6 !== peg$FAILED) {
        s7 = peg$parse__();
        s6 = [s6, s7];
        s5 = s6;
      } else {
        peg$currPos = s5;
        s5 = peg$FAILED;
      }
      if (s5 === peg$FAILED) {
        s5 = null;
      }
      rule$expects(peg$e0);
      if (input.charCodeAt(peg$currPos) === 61) {
        s6 = peg$c0;
        peg$currPos++;
      } else {
        s6 = peg$FAILED;
      }
      if (s6 !== peg$FAILED) {
        s4 = [s4, s5, s6];
        s3 = s4;
      } else {
        peg$currPos = s3;
        s3 = peg$FAILED;
      }
      peg$end(true);
      if (s3 === peg$FAILED) {
        s2 = undefined;
      } else {
        peg$currPos = s2;
        s2 = peg$FAILED;
      }
      if (s2 !== peg$FAILED) {
        peg$savedPos = s0;
        s0 = peg$f10(s1);
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }
    } else {
      peg$currPos = s0;
      s0 = peg$FAILED;
    }

    return s0;
  }

  function peg$parseSemanticPredicateExpression() {
    var s0, s1, s2, s3;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    s0 = peg$currPos;
    s1 = peg$parseSemanticPredicateOperator();
    if (s1 !== peg$FAILED) {
      s2 = peg$parse__();
      s3 = peg$parseCodeBlock();
      if (s3 !== peg$FAILED) {
        peg$savedPos = s0;
        s0 = peg$f11(s1, s3);
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }
    } else {
      peg$currPos = s0;
      s0 = peg$FAILED;
    }

    return s0;
  }

  function peg$parseSemanticPredicateOperator() {
    var s0;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    rule$expects(peg$e4);
    if (input.charCodeAt(peg$currPos) === 38) {
      s0 = peg$c4;
      peg$currPos++;
    } else {
      s0 = peg$FAILED;
    }
    if (s0 === peg$FAILED) {
      rule$expects(peg$e5);
      if (input.charCodeAt(peg$currPos) === 33) {
        s0 = peg$c5;
        peg$currPos++;
      } else {
        s0 = peg$FAILED;
      }
    }

    return s0;
  }

  function peg$parseSourceCharacter() {
    var s0;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    rule$expects(peg$e11);
    if (input.length > peg$currPos) {
      s0 = input.charAt(peg$currPos);
      peg$currPos++;
    } else {
      s0 = peg$FAILED;
    }

    return s0;
  }

  function peg$parseWhiteSpace() {
    var s0;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    rule$expects(peg$e12);
    peg$silentFails++;
    if (input.charCodeAt(peg$currPos) === 9) {
      s0 = peg$c11;
      peg$currPos++;
    } else {
      s0 = peg$FAILED;
    }
    if (s0 === peg$FAILED) {
      if (input.charCodeAt(peg$currPos) === 11) {
        s0 = peg$c12;
        peg$currPos++;
      } else {
        s0 = peg$FAILED;
      }
      if (s0 === peg$FAILED) {
        if (input.charCodeAt(peg$currPos) === 12) {
          s0 = peg$c13;
          peg$currPos++;
        } else {
          s0 = peg$FAILED;
        }
        if (s0 === peg$FAILED) {
          if (input.charCodeAt(peg$currPos) === 32) {
            s0 = peg$c14;
            peg$currPos++;
          } else {
            s0 = peg$FAILED;
          }
          if (s0 === peg$FAILED) {
            if (input.charCodeAt(peg$currPos) === 160) {
              s0 = peg$c15;
              peg$currPos++;
            } else {
              s0 = peg$FAILED;
            }
            if (s0 === peg$FAILED) {
              if (input.charCodeAt(peg$currPos) === 65279) {
                s0 = peg$c16;
                peg$currPos++;
              } else {
                s0 = peg$FAILED;
              }
              if (s0 === peg$FAILED) {
                s0 = peg$parseZs();
              }
            }
          }
        }
      }
    }
    peg$silentFails--;

    return s0;
  }

  function peg$parseLineTerminator() {
    var s0;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    rule$expects(peg$e13);
    if (peg$r0.test(input.charAt(peg$currPos))) {
      s0 = input.charAt(peg$currPos);
      peg$currPos++;
    } else {
      s0 = peg$FAILED;
    }

    return s0;
  }

  function peg$parseLineTerminatorSequence() {
    var s0;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    rule$expects(peg$e14);
    peg$silentFails++;
    if (input.charCodeAt(peg$currPos) === 10) {
      s0 = peg$c17;
      peg$currPos++;
    } else {
      s0 = peg$FAILED;
    }
    if (s0 === peg$FAILED) {
      if (input.substr(peg$currPos, 2) === peg$c18) {
        s0 = peg$c18;
        peg$currPos += 2;
      } else {
        s0 = peg$FAILED;
      }
      if (s0 === peg$FAILED) {
        if (input.charCodeAt(peg$currPos) === 13) {
          s0 = peg$c19;
          peg$currPos++;
        } else {
          s0 = peg$FAILED;
        }
        if (s0 === peg$FAILED) {
          if (input.charCodeAt(peg$currPos) === 8232) {
            s0 = peg$c20;
            peg$currPos++;
          } else {
            s0 = peg$FAILED;
          }
          if (s0 === peg$FAILED) {
            if (input.charCodeAt(peg$currPos) === 8233) {
              s0 = peg$c21;
              peg$currPos++;
            } else {
              s0 = peg$FAILED;
            }
          }
        }
      }
    }
    peg$silentFails--;

    return s0;
  }

  function peg$parseComment() {
    var s0;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    rule$expects(peg$e15);
    peg$silentFails++;
    s0 = peg$parseMultiLineComment();
    if (s0 === peg$FAILED) {
      s0 = peg$parseSingleLineComment();
    }
    peg$silentFails--;

    return s0;
  }

  function peg$parseMultiLineComment() {
    var s0, s1, s2, s3, s4, s5, s6;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    s0 = peg$currPos;
    if (input.substr(peg$currPos, 2) === peg$c22) {
      s1 = peg$c22;
      peg$currPos += 2;
    } else {
      s1 = peg$FAILED;
    }
    if (s1 !== peg$FAILED) {
      s2 = peg$currPos;
      s3 = [];
      s4 = peg$currPos;
      s5 = peg$currPos;
      peg$begin();
      if (input.substr(peg$currPos, 2) === peg$c23) {
        s6 = peg$c23;
        peg$currPos += 2;
      } else {
        s6 = peg$FAILED;
      }
      peg$end(true);
      if (s6 === peg$FAILED) {
        s5 = undefined;
      } else {
        peg$currPos = s5;
        s5 = peg$FAILED;
      }
      if (s5 !== peg$FAILED) {
        s6 = peg$parseSourceCharacter();
        if (s6 !== peg$FAILED) {
          s5 = [s5, s6];
          s4 = s5;
        } else {
          peg$currPos = s4;
          s4 = peg$FAILED;
        }
      } else {
        peg$currPos = s4;
        s4 = peg$FAILED;
      }
      while (s4 !== peg$FAILED) {
        s3.push(s4);
        s4 = peg$currPos;
        s5 = peg$currPos;
        peg$begin();
        if (input.substr(peg$currPos, 2) === peg$c23) {
          s6 = peg$c23;
          peg$currPos += 2;
        } else {
          s6 = peg$FAILED;
        }
        peg$end(true);
        if (s6 === peg$FAILED) {
          s5 = undefined;
        } else {
          peg$currPos = s5;
          s5 = peg$FAILED;
        }
        if (s5 !== peg$FAILED) {
          s6 = peg$parseSourceCharacter();
          if (s6 !== peg$FAILED) {
            s5 = [s5, s6];
            s4 = s5;
          } else {
            peg$currPos = s4;
            s4 = peg$FAILED;
          }
        } else {
          peg$currPos = s4;
          s4 = peg$FAILED;
        }
      }
      s2 = input.substring(s2, peg$currPos);
      if (input.substr(peg$currPos, 2) === peg$c23) {
        s3 = peg$c23;
        peg$currPos += 2;
      } else {
        s3 = peg$FAILED;
      }
      if (s3 !== peg$FAILED) {
        peg$savedPos = s0;
        s0 = peg$f12(s2);
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }
    } else {
      peg$currPos = s0;
      s0 = peg$FAILED;
    }

    return s0;
  }

  function peg$parseMultiLineCommentNoLineTerminator() {
    var s0, s1, s2, s3, s4, s5, s6;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    s0 = peg$currPos;
    rule$expects(peg$e16);
    if (input.substr(peg$currPos, 2) === peg$c22) {
      s1 = peg$c22;
      peg$currPos += 2;
    } else {
      s1 = peg$FAILED;
    }
    if (s1 !== peg$FAILED) {
      s2 = peg$currPos;
      s3 = [];
      s4 = peg$currPos;
      s5 = peg$currPos;
      peg$begin();
      rule$expects(peg$e17);
      if (input.substr(peg$currPos, 2) === peg$c23) {
        s6 = peg$c23;
        peg$currPos += 2;
      } else {
        s6 = peg$FAILED;
      }
      if (s6 === peg$FAILED) {
        s6 = peg$parseLineTerminator();
      }
      peg$end(true);
      if (s6 === peg$FAILED) {
        s5 = undefined;
      } else {
        peg$currPos = s5;
        s5 = peg$FAILED;
      }
      if (s5 !== peg$FAILED) {
        s6 = peg$parseSourceCharacter();
        if (s6 !== peg$FAILED) {
          s5 = [s5, s6];
          s4 = s5;
        } else {
          peg$currPos = s4;
          s4 = peg$FAILED;
        }
      } else {
        peg$currPos = s4;
        s4 = peg$FAILED;
      }
      while (s4 !== peg$FAILED) {
        s3.push(s4);
        s4 = peg$currPos;
        s5 = peg$currPos;
        peg$begin();
        rule$expects(peg$e17);
        if (input.substr(peg$currPos, 2) === peg$c23) {
          s6 = peg$c23;
          peg$currPos += 2;
        } else {
          s6 = peg$FAILED;
        }
        if (s6 === peg$FAILED) {
          s6 = peg$parseLineTerminator();
        }
        peg$end(true);
        if (s6 === peg$FAILED) {
          s5 = undefined;
        } else {
          peg$currPos = s5;
          s5 = peg$FAILED;
        }
        if (s5 !== peg$FAILED) {
          s6 = peg$parseSourceCharacter();
          if (s6 !== peg$FAILED) {
            s5 = [s5, s6];
            s4 = s5;
          } else {
            peg$currPos = s4;
            s4 = peg$FAILED;
          }
        } else {
          peg$currPos = s4;
          s4 = peg$FAILED;
        }
      }
      s2 = input.substring(s2, peg$currPos);
      rule$expects(peg$e17);
      if (input.substr(peg$currPos, 2) === peg$c23) {
        s3 = peg$c23;
        peg$currPos += 2;
      } else {
        s3 = peg$FAILED;
      }
      if (s3 !== peg$FAILED) {
        peg$savedPos = s0;
        s0 = peg$f12(s2);
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }
    } else {
      peg$currPos = s0;
      s0 = peg$FAILED;
    }

    return s0;
  }

  function peg$parseSingleLineComment() {
    var s0, s1, s2, s3, s4, s5, s6;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    s0 = peg$currPos;
    rule$expects(peg$e18);
    if (input.substr(peg$currPos, 2) === peg$c24) {
      s1 = peg$c24;
      peg$currPos += 2;
    } else {
      s1 = peg$FAILED;
    }
    if (s1 !== peg$FAILED) {
      s2 = peg$currPos;
      s3 = [];
      s4 = peg$currPos;
      s5 = peg$currPos;
      peg$begin();
      s6 = peg$parseLineTerminator();
      peg$end(true);
      if (s6 === peg$FAILED) {
        s5 = undefined;
      } else {
        peg$currPos = s5;
        s5 = peg$FAILED;
      }
      if (s5 !== peg$FAILED) {
        s6 = peg$parseSourceCharacter();
        if (s6 !== peg$FAILED) {
          s5 = [s5, s6];
          s4 = s5;
        } else {
          peg$currPos = s4;
          s4 = peg$FAILED;
        }
      } else {
        peg$currPos = s4;
        s4 = peg$FAILED;
      }
      while (s4 !== peg$FAILED) {
        s3.push(s4);
        s4 = peg$currPos;
        s5 = peg$currPos;
        peg$begin();
        s6 = peg$parseLineTerminator();
        peg$end(true);
        if (s6 === peg$FAILED) {
          s5 = undefined;
        } else {
          peg$currPos = s5;
          s5 = peg$FAILED;
        }
        if (s5 !== peg$FAILED) {
          s6 = peg$parseSourceCharacter();
          if (s6 !== peg$FAILED) {
            s5 = [s5, s6];
            s4 = s5;
          } else {
            peg$currPos = s4;
            s4 = peg$FAILED;
          }
        } else {
          peg$currPos = s4;
          s4 = peg$FAILED;
        }
      }
      s2 = input.substring(s2, peg$currPos);
      peg$savedPos = s0;
      s0 = peg$f13(s2);
    } else {
      peg$currPos = s0;
      s0 = peg$FAILED;
    }

    return s0;
  }

  function peg$parseIdentifier() {
    var s0, s1;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    s0 = peg$currPos;
    s1 = peg$parseIdentifierName();
    if (s1 !== peg$FAILED) {
      peg$savedPos = s0;
      s1 = peg$f14(s1);
    }
    s0 = s1;

    return s0;
  }

  function peg$parseIdentifierName() {
    var s0, s1, s2, s3;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    rule$expects(peg$e19);
    peg$silentFails++;
    s0 = peg$currPos;
    s1 = peg$parseIdentifierStart();
    if (s1 !== peg$FAILED) {
      s2 = [];
      s3 = peg$parseIdentifierPart();
      while (s3 !== peg$FAILED) {
        s2.push(s3);
        s3 = peg$parseIdentifierPart();
      }
      peg$savedPos = s0;
      s0 = peg$f15(s1, s2);
    } else {
      peg$currPos = s0;
      s0 = peg$FAILED;
    }
    peg$silentFails--;

    return s0;
  }

  function peg$parseIdentifierStart() {
    var s0, s1, s2;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    s0 = peg$parseUnicodeLetter();
    if (s0 === peg$FAILED) {
      if (input.charCodeAt(peg$currPos) === 36) {
        s0 = peg$c3;
        peg$currPos++;
      } else {
        s0 = peg$FAILED;
      }
      if (s0 === peg$FAILED) {
        if (input.charCodeAt(peg$currPos) === 95) {
          s0 = peg$c25;
          peg$currPos++;
        } else {
          s0 = peg$FAILED;
        }
        if (s0 === peg$FAILED) {
          s0 = peg$currPos;
          if (input.charCodeAt(peg$currPos) === 92) {
            s1 = peg$c26;
            peg$currPos++;
          } else {
            s1 = peg$FAILED;
          }
          if (s1 !== peg$FAILED) {
            s2 = peg$parseUnicodeEscapeSequence();
            if (s2 !== peg$FAILED) {
              peg$savedPos = s0;
              s0 = peg$f16(s2);
            } else {
              peg$currPos = s0;
              s0 = peg$FAILED;
            }
          } else {
            peg$currPos = s0;
            s0 = peg$FAILED;
          }
        }
      }
    }

    return s0;
  }

  function peg$parseIdentifierPart() {
    var s0;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    s0 = peg$parseIdentifierStart();
    if (s0 === peg$FAILED) {
      s0 = peg$parseUnicodeCombiningMark();
      if (s0 === peg$FAILED) {
        s0 = peg$parseNd();
        if (s0 === peg$FAILED) {
          s0 = peg$parsePc();
          if (s0 === peg$FAILED) {
            if (input.charCodeAt(peg$currPos) === 8204) {
              s0 = peg$c27;
              peg$currPos++;
            } else {
              s0 = peg$FAILED;
            }
            if (s0 === peg$FAILED) {
              if (input.charCodeAt(peg$currPos) === 8205) {
                s0 = peg$c28;
                peg$currPos++;
              } else {
                s0 = peg$FAILED;
              }
            }
          }
        }
      }
    }

    return s0;
  }

  function peg$parseUnicodeLetter() {
    var s0;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    s0 = peg$parseLu();
    if (s0 === peg$FAILED) {
      s0 = peg$parseLl();
      if (s0 === peg$FAILED) {
        s0 = peg$parseLt();
        if (s0 === peg$FAILED) {
          s0 = peg$parseLm();
          if (s0 === peg$FAILED) {
            s0 = peg$parseLo();
            if (s0 === peg$FAILED) {
              s0 = peg$parseNl();
            }
          }
        }
      }
    }

    return s0;
  }

  function peg$parseUnicodeCombiningMark() {
    var s0;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    s0 = peg$parseMn();
    if (s0 === peg$FAILED) {
      s0 = peg$parseMc();
    }

    return s0;
  }

  function peg$parseLiteralMatcher() {
    var s0, s1, s2;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    rule$expects(peg$e20);
    peg$silentFails++;
    s0 = peg$currPos;
    s1 = peg$parseStringLiteral();
    if (s1 !== peg$FAILED) {
      if (input.charCodeAt(peg$currPos) === 105) {
        s2 = peg$c29;
        peg$currPos++;
      } else {
        s2 = peg$FAILED;
      }
      if (s2 === peg$FAILED) {
        s2 = null;
      }
      peg$savedPos = s0;
      s0 = peg$f17(s1, s2);
    } else {
      peg$currPos = s0;
      s0 = peg$FAILED;
    }
    peg$silentFails--;

    return s0;
  }

  function peg$parseStringLiteral() {
    var s0, s1, s2, s3;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    rule$expects(peg$e21);
    peg$silentFails++;
    s0 = peg$currPos;
    if (input.charCodeAt(peg$currPos) === 34) {
      s1 = peg$c30;
      peg$currPos++;
    } else {
      s1 = peg$FAILED;
    }
    if (s1 !== peg$FAILED) {
      s2 = [];
      s3 = peg$parseDoubleStringCharacter();
      while (s3 !== peg$FAILED) {
        s2.push(s3);
        s3 = peg$parseDoubleStringCharacter();
      }
      if (input.charCodeAt(peg$currPos) === 34) {
        s3 = peg$c30;
        peg$currPos++;
      } else {
        s3 = peg$FAILED;
      }
      if (s3 !== peg$FAILED) {
        peg$savedPos = s0;
        s0 = peg$f18(s2);
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }
    } else {
      peg$currPos = s0;
      s0 = peg$FAILED;
    }
    if (s0 === peg$FAILED) {
      s0 = peg$currPos;
      if (input.charCodeAt(peg$currPos) === 39) {
        s1 = peg$c31;
        peg$currPos++;
      } else {
        s1 = peg$FAILED;
      }
      if (s1 !== peg$FAILED) {
        s2 = [];
        s3 = peg$parseSingleStringCharacter();
        while (s3 !== peg$FAILED) {
          s2.push(s3);
          s3 = peg$parseSingleStringCharacter();
        }
        if (input.charCodeAt(peg$currPos) === 39) {
          s3 = peg$c31;
          peg$currPos++;
        } else {
          s3 = peg$FAILED;
        }
        if (s3 !== peg$FAILED) {
          peg$savedPos = s0;
          s0 = peg$f18(s2);
        } else {
          peg$currPos = s0;
          s0 = peg$FAILED;
        }
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }
    }
    peg$silentFails--;

    return s0;
  }

  function peg$parseDoubleStringCharacter() {
    var s0, s1, s2;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    s0 = peg$currPos;
    s1 = peg$currPos;
    peg$begin();
    if (input.charCodeAt(peg$currPos) === 34) {
      s2 = peg$c30;
      peg$currPos++;
    } else {
      s2 = peg$FAILED;
    }
    if (s2 === peg$FAILED) {
      if (input.charCodeAt(peg$currPos) === 92) {
        s2 = peg$c26;
        peg$currPos++;
      } else {
        s2 = peg$FAILED;
      }
      if (s2 === peg$FAILED) {
        s2 = peg$parseLineTerminator();
      }
    }
    peg$end(true);
    if (s2 === peg$FAILED) {
      s1 = undefined;
    } else {
      peg$currPos = s1;
      s1 = peg$FAILED;
    }
    if (s1 !== peg$FAILED) {
      s2 = peg$parseSourceCharacter();
      if (s2 !== peg$FAILED) {
        peg$savedPos = s0;
        s0 = peg$f19();
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }
    } else {
      peg$currPos = s0;
      s0 = peg$FAILED;
    }
    if (s0 === peg$FAILED) {
      s0 = peg$currPos;
      if (input.charCodeAt(peg$currPos) === 92) {
        s1 = peg$c26;
        peg$currPos++;
      } else {
        s1 = peg$FAILED;
      }
      if (s1 !== peg$FAILED) {
        s2 = peg$parseEscapeSequence();
        if (s2 !== peg$FAILED) {
          peg$savedPos = s0;
          s0 = peg$f16(s2);
        } else {
          peg$currPos = s0;
          s0 = peg$FAILED;
        }
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }
      if (s0 === peg$FAILED) {
        s0 = peg$parseLineContinuation();
      }
    }

    return s0;
  }

  function peg$parseSingleStringCharacter() {
    var s0, s1, s2;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    s0 = peg$currPos;
    s1 = peg$currPos;
    peg$begin();
    if (input.charCodeAt(peg$currPos) === 39) {
      s2 = peg$c31;
      peg$currPos++;
    } else {
      s2 = peg$FAILED;
    }
    if (s2 === peg$FAILED) {
      if (input.charCodeAt(peg$currPos) === 92) {
        s2 = peg$c26;
        peg$currPos++;
      } else {
        s2 = peg$FAILED;
      }
      if (s2 === peg$FAILED) {
        s2 = peg$parseLineTerminator();
      }
    }
    peg$end(true);
    if (s2 === peg$FAILED) {
      s1 = undefined;
    } else {
      peg$currPos = s1;
      s1 = peg$FAILED;
    }
    if (s1 !== peg$FAILED) {
      s2 = peg$parseSourceCharacter();
      if (s2 !== peg$FAILED) {
        peg$savedPos = s0;
        s0 = peg$f19();
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }
    } else {
      peg$currPos = s0;
      s0 = peg$FAILED;
    }
    if (s0 === peg$FAILED) {
      s0 = peg$currPos;
      if (input.charCodeAt(peg$currPos) === 92) {
        s1 = peg$c26;
        peg$currPos++;
      } else {
        s1 = peg$FAILED;
      }
      if (s1 !== peg$FAILED) {
        s2 = peg$parseEscapeSequence();
        if (s2 !== peg$FAILED) {
          peg$savedPos = s0;
          s0 = peg$f16(s2);
        } else {
          peg$currPos = s0;
          s0 = peg$FAILED;
        }
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }
      if (s0 === peg$FAILED) {
        s0 = peg$parseLineContinuation();
      }
    }

    return s0;
  }

  function peg$parseCharacterClassMatcher() {
    var s0, s1, s2, s3, s4, s5;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    rule$expects(peg$e22);
    peg$silentFails++;
    s0 = peg$currPos;
    if (input.charCodeAt(peg$currPos) === 91) {
      s1 = peg$c32;
      peg$currPos++;
    } else {
      s1 = peg$FAILED;
    }
    if (s1 !== peg$FAILED) {
      if (input.charCodeAt(peg$currPos) === 94) {
        s2 = peg$c33;
        peg$currPos++;
      } else {
        s2 = peg$FAILED;
      }
      if (s2 === peg$FAILED) {
        s2 = null;
      }
      s3 = [];
      s4 = peg$parseClassCharacterRange();
      if (s4 === peg$FAILED) {
        s4 = peg$parseClassCharacter();
      }
      while (s4 !== peg$FAILED) {
        s3.push(s4);
        s4 = peg$parseClassCharacterRange();
        if (s4 === peg$FAILED) {
          s4 = peg$parseClassCharacter();
        }
      }
      if (input.charCodeAt(peg$currPos) === 93) {
        s4 = peg$c34;
        peg$currPos++;
      } else {
        s4 = peg$FAILED;
      }
      if (s4 !== peg$FAILED) {
        if (input.charCodeAt(peg$currPos) === 105) {
          s5 = peg$c29;
          peg$currPos++;
        } else {
          s5 = peg$FAILED;
        }
        if (s5 === peg$FAILED) {
          s5 = null;
        }
        peg$savedPos = s0;
        s0 = peg$f20(s2, s3, s5);
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }
    } else {
      peg$currPos = s0;
      s0 = peg$FAILED;
    }
    peg$silentFails--;

    return s0;
  }

  function peg$parseClassCharacterRange() {
    var s0, s1, s2, s3;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    s0 = peg$currPos;
    s1 = peg$parseClassCharacter();
    if (s1 !== peg$FAILED) {
      if (input.charCodeAt(peg$currPos) === 45) {
        s2 = peg$c35;
        peg$currPos++;
      } else {
        s2 = peg$FAILED;
      }
      if (s2 !== peg$FAILED) {
        s3 = peg$parseClassCharacter();
        if (s3 !== peg$FAILED) {
          peg$savedPos = s0;
          s0 = peg$f21(s1, s3);
        } else {
          peg$currPos = s0;
          s0 = peg$FAILED;
        }
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }
    } else {
      peg$currPos = s0;
      s0 = peg$FAILED;
    }

    return s0;
  }

  function peg$parseClassCharacter() {
    var s0, s1, s2;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    s0 = peg$currPos;
    s1 = peg$currPos;
    peg$begin();
    if (input.charCodeAt(peg$currPos) === 93) {
      s2 = peg$c34;
      peg$currPos++;
    } else {
      s2 = peg$FAILED;
    }
    if (s2 === peg$FAILED) {
      if (input.charCodeAt(peg$currPos) === 92) {
        s2 = peg$c26;
        peg$currPos++;
      } else {
        s2 = peg$FAILED;
      }
      if (s2 === peg$FAILED) {
        s2 = peg$parseLineTerminator();
      }
    }
    peg$end(true);
    if (s2 === peg$FAILED) {
      s1 = undefined;
    } else {
      peg$currPos = s1;
      s1 = peg$FAILED;
    }
    if (s1 !== peg$FAILED) {
      s2 = peg$parseSourceCharacter();
      if (s2 !== peg$FAILED) {
        peg$savedPos = s0;
        s0 = peg$f19();
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }
    } else {
      peg$currPos = s0;
      s0 = peg$FAILED;
    }
    if (s0 === peg$FAILED) {
      s0 = peg$currPos;
      if (input.charCodeAt(peg$currPos) === 92) {
        s1 = peg$c26;
        peg$currPos++;
      } else {
        s1 = peg$FAILED;
      }
      if (s1 !== peg$FAILED) {
        s2 = peg$parseEscapeSequence();
        if (s2 !== peg$FAILED) {
          peg$savedPos = s0;
          s0 = peg$f16(s2);
        } else {
          peg$currPos = s0;
          s0 = peg$FAILED;
        }
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }
      if (s0 === peg$FAILED) {
        s0 = peg$parseLineContinuation();
      }
    }

    return s0;
  }

  function peg$parseLineContinuation() {
    var s0, s1, s2;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    s0 = peg$currPos;
    if (input.charCodeAt(peg$currPos) === 92) {
      s1 = peg$c26;
      peg$currPos++;
    } else {
      s1 = peg$FAILED;
    }
    if (s1 !== peg$FAILED) {
      s2 = peg$parseLineTerminatorSequence();
      if (s2 !== peg$FAILED) {
        peg$savedPos = s0;
        s0 = peg$f22();
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }
    } else {
      peg$currPos = s0;
      s0 = peg$FAILED;
    }

    return s0;
  }

  function peg$parseEscapeSequence() {
    var s0, s1, s2, s3;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    s0 = peg$parseCharacterEscapeSequence();
    if (s0 === peg$FAILED) {
      s0 = peg$currPos;
      if (input.charCodeAt(peg$currPos) === 48) {
        s1 = peg$c36;
        peg$currPos++;
      } else {
        s1 = peg$FAILED;
      }
      if (s1 !== peg$FAILED) {
        s2 = peg$currPos;
        peg$begin();
        s3 = peg$parseDecimalDigit();
        peg$end(true);
        if (s3 === peg$FAILED) {
          s2 = undefined;
        } else {
          peg$currPos = s2;
          s2 = peg$FAILED;
        }
        if (s2 !== peg$FAILED) {
          peg$savedPos = s0;
          s0 = peg$f23();
        } else {
          peg$currPos = s0;
          s0 = peg$FAILED;
        }
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }
      if (s0 === peg$FAILED) {
        s0 = peg$parseHexEscapeSequence();
        if (s0 === peg$FAILED) {
          s0 = peg$parseUnicodeEscapeSequence();
        }
      }
    }

    return s0;
  }

  function peg$parseCharacterEscapeSequence() {
    var s0;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    s0 = peg$parseSingleEscapeCharacter();
    if (s0 === peg$FAILED) {
      s0 = peg$parseNonEscapeCharacter();
    }

    return s0;
  }

  function peg$parseSingleEscapeCharacter() {
    var s0, s1;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    if (input.charCodeAt(peg$currPos) === 39) {
      s0 = peg$c31;
      peg$currPos++;
    } else {
      s0 = peg$FAILED;
    }
    if (s0 === peg$FAILED) {
      if (input.charCodeAt(peg$currPos) === 34) {
        s0 = peg$c30;
        peg$currPos++;
      } else {
        s0 = peg$FAILED;
      }
      if (s0 === peg$FAILED) {
        if (input.charCodeAt(peg$currPos) === 92) {
          s0 = peg$c26;
          peg$currPos++;
        } else {
          s0 = peg$FAILED;
        }
        if (s0 === peg$FAILED) {
          s0 = peg$currPos;
          if (input.charCodeAt(peg$currPos) === 98) {
            s1 = peg$c37;
            peg$currPos++;
          } else {
            s1 = peg$FAILED;
          }
          if (s1 !== peg$FAILED) {
            peg$savedPos = s0;
            s1 = peg$f24();
          }
          s0 = s1;
          if (s0 === peg$FAILED) {
            s0 = peg$currPos;
            if (input.charCodeAt(peg$currPos) === 102) {
              s1 = peg$c38;
              peg$currPos++;
            } else {
              s1 = peg$FAILED;
            }
            if (s1 !== peg$FAILED) {
              peg$savedPos = s0;
              s1 = peg$f25();
            }
            s0 = s1;
            if (s0 === peg$FAILED) {
              s0 = peg$currPos;
              if (input.charCodeAt(peg$currPos) === 110) {
                s1 = peg$c39;
                peg$currPos++;
              } else {
                s1 = peg$FAILED;
              }
              if (s1 !== peg$FAILED) {
                peg$savedPos = s0;
                s1 = peg$f26();
              }
              s0 = s1;
              if (s0 === peg$FAILED) {
                s0 = peg$currPos;
                if (input.charCodeAt(peg$currPos) === 114) {
                  s1 = peg$c40;
                  peg$currPos++;
                } else {
                  s1 = peg$FAILED;
                }
                if (s1 !== peg$FAILED) {
                  peg$savedPos = s0;
                  s1 = peg$f27();
                }
                s0 = s1;
                if (s0 === peg$FAILED) {
                  s0 = peg$currPos;
                  if (input.charCodeAt(peg$currPos) === 116) {
                    s1 = peg$c41;
                    peg$currPos++;
                  } else {
                    s1 = peg$FAILED;
                  }
                  if (s1 !== peg$FAILED) {
                    peg$savedPos = s0;
                    s1 = peg$f28();
                  }
                  s0 = s1;
                  if (s0 === peg$FAILED) {
                    s0 = peg$currPos;
                    if (input.charCodeAt(peg$currPos) === 118) {
                      s1 = peg$c42;
                      peg$currPos++;
                    } else {
                      s1 = peg$FAILED;
                    }
                    if (s1 !== peg$FAILED) {
                      peg$savedPos = s0;
                      s1 = peg$f29();
                    }
                    s0 = s1;
                  }
                }
              }
            }
          }
        }
      }
    }

    return s0;
  }

  function peg$parseNonEscapeCharacter() {
    var s0, s1, s2;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    s0 = peg$currPos;
    s1 = peg$currPos;
    peg$begin();
    s2 = peg$parseEscapeCharacter();
    if (s2 === peg$FAILED) {
      s2 = peg$parseLineTerminator();
    }
    peg$end(true);
    if (s2 === peg$FAILED) {
      s1 = undefined;
    } else {
      peg$currPos = s1;
      s1 = peg$FAILED;
    }
    if (s1 !== peg$FAILED) {
      s2 = peg$parseSourceCharacter();
      if (s2 !== peg$FAILED) {
        peg$savedPos = s0;
        s0 = peg$f19();
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }
    } else {
      peg$currPos = s0;
      s0 = peg$FAILED;
    }

    return s0;
  }

  function peg$parseEscapeCharacter() {
    var s0;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    s0 = peg$parseSingleEscapeCharacter();
    if (s0 === peg$FAILED) {
      s0 = peg$parseDecimalDigit();
      if (s0 === peg$FAILED) {
        if (input.charCodeAt(peg$currPos) === 120) {
          s0 = peg$c43;
          peg$currPos++;
        } else {
          s0 = peg$FAILED;
        }
        if (s0 === peg$FAILED) {
          if (input.charCodeAt(peg$currPos) === 117) {
            s0 = peg$c44;
            peg$currPos++;
          } else {
            s0 = peg$FAILED;
          }
        }
      }
    }

    return s0;
  }

  function peg$parseHexEscapeSequence() {
    var s0, s1, s2, s3, s4, s5;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    s0 = peg$currPos;
    if (input.charCodeAt(peg$currPos) === 120) {
      s1 = peg$c43;
      peg$currPos++;
    } else {
      s1 = peg$FAILED;
    }
    if (s1 !== peg$FAILED) {
      s2 = peg$currPos;
      s3 = peg$currPos;
      s4 = peg$parseHexDigit();
      if (s4 !== peg$FAILED) {
        s5 = peg$parseHexDigit();
        if (s5 !== peg$FAILED) {
          s4 = [s4, s5];
          s3 = s4;
        } else {
          peg$currPos = s3;
          s3 = peg$FAILED;
        }
      } else {
        peg$currPos = s3;
        s3 = peg$FAILED;
      }
      if (s3 !== peg$FAILED) {
        s2 = input.substring(s2, peg$currPos);
      } else {
        s2 = s3;
      }
      if (s2 !== peg$FAILED) {
        peg$savedPos = s0;
        s0 = peg$f30(s2);
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }
    } else {
      peg$currPos = s0;
      s0 = peg$FAILED;
    }

    return s0;
  }

  function peg$parseUnicodeEscapeSequence() {
    var s0, s1, s2, s3, s4, s5, s6, s7;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    s0 = peg$currPos;
    if (input.charCodeAt(peg$currPos) === 117) {
      s1 = peg$c44;
      peg$currPos++;
    } else {
      s1 = peg$FAILED;
    }
    if (s1 !== peg$FAILED) {
      s2 = peg$currPos;
      s3 = peg$currPos;
      s4 = peg$parseHexDigit();
      if (s4 !== peg$FAILED) {
        s5 = peg$parseHexDigit();
        if (s5 !== peg$FAILED) {
          s6 = peg$parseHexDigit();
          if (s6 !== peg$FAILED) {
            s7 = peg$parseHexDigit();
            if (s7 !== peg$FAILED) {
              s4 = [s4, s5, s6, s7];
              s3 = s4;
            } else {
              peg$currPos = s3;
              s3 = peg$FAILED;
            }
          } else {
            peg$currPos = s3;
            s3 = peg$FAILED;
          }
        } else {
          peg$currPos = s3;
          s3 = peg$FAILED;
        }
      } else {
        peg$currPos = s3;
        s3 = peg$FAILED;
      }
      if (s3 !== peg$FAILED) {
        s2 = input.substring(s2, peg$currPos);
      } else {
        s2 = s3;
      }
      if (s2 !== peg$FAILED) {
        peg$savedPos = s0;
        s0 = peg$f30(s2);
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }
    } else {
      peg$currPos = s0;
      s0 = peg$FAILED;
    }

    return s0;
  }

  function peg$parseDecimalDigit() {
    var s0;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    if (peg$r1.test(input.charAt(peg$currPos))) {
      s0 = input.charAt(peg$currPos);
      peg$currPos++;
    } else {
      s0 = peg$FAILED;
    }

    return s0;
  }

  function peg$parseHexDigit() {
    var s0;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    if (peg$r2.test(input.charAt(peg$currPos))) {
      s0 = input.charAt(peg$currPos);
      peg$currPos++;
    } else {
      s0 = peg$FAILED;
    }

    return s0;
  }

  function peg$parseAnyMatcher() {
    var s0, s1;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    s0 = peg$currPos;
    rule$expects(peg$e23);
    if (input.charCodeAt(peg$currPos) === 46) {
      s1 = peg$c45;
      peg$currPos++;
    } else {
      s1 = peg$FAILED;
    }
    if (s1 !== peg$FAILED) {
      peg$savedPos = s0;
      s1 = peg$f31();
    }
    s0 = s1;

    return s0;
  }

  function peg$parseCodeBlock() {
    var s0, s1, s2, s3;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    rule$expects(peg$e24);
    peg$silentFails++;
    s0 = peg$currPos;
    if (input.charCodeAt(peg$currPos) === 123) {
      s1 = peg$c46;
      peg$currPos++;
    } else {
      s1 = peg$FAILED;
    }
    if (s1 !== peg$FAILED) {
      s2 = peg$parseCode();
      if (input.charCodeAt(peg$currPos) === 125) {
        s3 = peg$c47;
        peg$currPos++;
      } else {
        s3 = peg$FAILED;
      }
      if (s3 !== peg$FAILED) {
        peg$savedPos = s0;
        s0 = peg$f32(s2);
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }
    } else {
      peg$currPos = s0;
      s0 = peg$FAILED;
    }
    if (s0 === peg$FAILED) {
      s0 = peg$currPos;
      if (input.charCodeAt(peg$currPos) === 123) {
        s1 = peg$c46;
        peg$currPos++;
      } else {
        s1 = peg$FAILED;
      }
      if (s1 !== peg$FAILED) {
        peg$savedPos = s0;
        s1 = peg$f33();
      }
      s0 = s1;
    }
    peg$silentFails--;

    return s0;
  }

  function peg$parseCode() {
    var s0, s1, s2, s3, s4, s5;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    s0 = peg$currPos;
    s1 = [];
    s2 = [];
    s3 = peg$currPos;
    s4 = peg$currPos;
    peg$begin();
    if (peg$r3.test(input.charAt(peg$currPos))) {
      s5 = input.charAt(peg$currPos);
      peg$currPos++;
    } else {
      s5 = peg$FAILED;
    }
    peg$end(true);
    if (s5 === peg$FAILED) {
      s4 = undefined;
    } else {
      peg$currPos = s4;
      s4 = peg$FAILED;
    }
    if (s4 !== peg$FAILED) {
      s5 = peg$parseSourceCharacter();
      if (s5 !== peg$FAILED) {
        s4 = [s4, s5];
        s3 = s4;
      } else {
        peg$currPos = s3;
        s3 = peg$FAILED;
      }
    } else {
      peg$currPos = s3;
      s3 = peg$FAILED;
    }
    if (s3 !== peg$FAILED) {
      while (s3 !== peg$FAILED) {
        s2.push(s3);
        s3 = peg$currPos;
        s4 = peg$currPos;
        peg$begin();
        if (peg$r3.test(input.charAt(peg$currPos))) {
          s5 = input.charAt(peg$currPos);
          peg$currPos++;
        } else {
          s5 = peg$FAILED;
        }
        peg$end(true);
        if (s5 === peg$FAILED) {
          s4 = undefined;
        } else {
          peg$currPos = s4;
          s4 = peg$FAILED;
        }
        if (s4 !== peg$FAILED) {
          s5 = peg$parseSourceCharacter();
          if (s5 !== peg$FAILED) {
            s4 = [s4, s5];
            s3 = s4;
          } else {
            peg$currPos = s3;
            s3 = peg$FAILED;
          }
        } else {
          peg$currPos = s3;
          s3 = peg$FAILED;
        }
      }
    } else {
      s2 = peg$FAILED;
    }
    if (s2 === peg$FAILED) {
      s2 = peg$currPos;
      if (input.charCodeAt(peg$currPos) === 123) {
        s3 = peg$c46;
        peg$currPos++;
      } else {
        s3 = peg$FAILED;
      }
      if (s3 !== peg$FAILED) {
        s4 = peg$parseCode();
        if (input.charCodeAt(peg$currPos) === 125) {
          s5 = peg$c47;
          peg$currPos++;
        } else {
          s5 = peg$FAILED;
        }
        if (s5 !== peg$FAILED) {
          s3 = [s3, s4, s5];
          s2 = s3;
        } else {
          peg$currPos = s2;
          s2 = peg$FAILED;
        }
      } else {
        peg$currPos = s2;
        s2 = peg$FAILED;
      }
    }
    while (s2 !== peg$FAILED) {
      s1.push(s2);
      s2 = [];
      s3 = peg$currPos;
      s4 = peg$currPos;
      peg$begin();
      if (peg$r3.test(input.charAt(peg$currPos))) {
        s5 = input.charAt(peg$currPos);
        peg$currPos++;
      } else {
        s5 = peg$FAILED;
      }
      peg$end(true);
      if (s5 === peg$FAILED) {
        s4 = undefined;
      } else {
        peg$currPos = s4;
        s4 = peg$FAILED;
      }
      if (s4 !== peg$FAILED) {
        s5 = peg$parseSourceCharacter();
        if (s5 !== peg$FAILED) {
          s4 = [s4, s5];
          s3 = s4;
        } else {
          peg$currPos = s3;
          s3 = peg$FAILED;
        }
      } else {
        peg$currPos = s3;
        s3 = peg$FAILED;
      }
      if (s3 !== peg$FAILED) {
        while (s3 !== peg$FAILED) {
          s2.push(s3);
          s3 = peg$currPos;
          s4 = peg$currPos;
          peg$begin();
          if (peg$r3.test(input.charAt(peg$currPos))) {
            s5 = input.charAt(peg$currPos);
            peg$currPos++;
          } else {
            s5 = peg$FAILED;
          }
          peg$end(true);
          if (s5 === peg$FAILED) {
            s4 = undefined;
          } else {
            peg$currPos = s4;
            s4 = peg$FAILED;
          }
          if (s4 !== peg$FAILED) {
            s5 = peg$parseSourceCharacter();
            if (s5 !== peg$FAILED) {
              s4 = [s4, s5];
              s3 = s4;
            } else {
              peg$currPos = s3;
              s3 = peg$FAILED;
            }
          } else {
            peg$currPos = s3;
            s3 = peg$FAILED;
          }
        }
      } else {
        s2 = peg$FAILED;
      }
      if (s2 === peg$FAILED) {
        s2 = peg$currPos;
        if (input.charCodeAt(peg$currPos) === 123) {
          s3 = peg$c46;
          peg$currPos++;
        } else {
          s3 = peg$FAILED;
        }
        if (s3 !== peg$FAILED) {
          s4 = peg$parseCode();
          if (input.charCodeAt(peg$currPos) === 125) {
            s5 = peg$c47;
            peg$currPos++;
          } else {
            s5 = peg$FAILED;
          }
          if (s5 !== peg$FAILED) {
            s3 = [s3, s4, s5];
            s2 = s3;
          } else {
            peg$currPos = s2;
            s2 = peg$FAILED;
          }
        } else {
          peg$currPos = s2;
          s2 = peg$FAILED;
        }
      }
    }
    s0 = input.substring(s0, peg$currPos);

    return s0;
  }

  function peg$parseLl() {
    var s0;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    if (peg$r4.test(input.charAt(peg$currPos))) {
      s0 = input.charAt(peg$currPos);
      peg$currPos++;
    } else {
      s0 = peg$FAILED;
    }

    return s0;
  }

  function peg$parseLm() {
    var s0;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    if (peg$r5.test(input.charAt(peg$currPos))) {
      s0 = input.charAt(peg$currPos);
      peg$currPos++;
    } else {
      s0 = peg$FAILED;
    }

    return s0;
  }

  function peg$parseLo() {
    var s0;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    if (peg$r6.test(input.charAt(peg$currPos))) {
      s0 = input.charAt(peg$currPos);
      peg$currPos++;
    } else {
      s0 = peg$FAILED;
    }

    return s0;
  }

  function peg$parseLt() {
    var s0;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    if (peg$r7.test(input.charAt(peg$currPos))) {
      s0 = input.charAt(peg$currPos);
      peg$currPos++;
    } else {
      s0 = peg$FAILED;
    }

    return s0;
  }

  function peg$parseLu() {
    var s0;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    if (peg$r8.test(input.charAt(peg$currPos))) {
      s0 = input.charAt(peg$currPos);
      peg$currPos++;
    } else {
      s0 = peg$FAILED;
    }

    return s0;
  }

  function peg$parseMc() {
    var s0;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    if (peg$r9.test(input.charAt(peg$currPos))) {
      s0 = input.charAt(peg$currPos);
      peg$currPos++;
    } else {
      s0 = peg$FAILED;
    }

    return s0;
  }

  function peg$parseMn() {
    var s0;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    if (peg$r10.test(input.charAt(peg$currPos))) {
      s0 = input.charAt(peg$currPos);
      peg$currPos++;
    } else {
      s0 = peg$FAILED;
    }

    return s0;
  }

  function peg$parseNd() {
    var s0;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    if (peg$r11.test(input.charAt(peg$currPos))) {
      s0 = input.charAt(peg$currPos);
      peg$currPos++;
    } else {
      s0 = peg$FAILED;
    }

    return s0;
  }

  function peg$parseNl() {
    var s0;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    if (peg$r12.test(input.charAt(peg$currPos))) {
      s0 = input.charAt(peg$currPos);
      peg$currPos++;
    } else {
      s0 = peg$FAILED;
    }

    return s0;
  }

  function peg$parsePc() {
    var s0;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    if (peg$r13.test(input.charAt(peg$currPos))) {
      s0 = input.charAt(peg$currPos);
      peg$currPos++;
    } else {
      s0 = peg$FAILED;
    }

    return s0;
  }

  function peg$parseZs() {
    var s0;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    if (peg$r14.test(input.charAt(peg$currPos))) {
      s0 = input.charAt(peg$currPos);
      peg$currPos++;
    } else {
      s0 = peg$FAILED;
    }

    return s0;
  }

  function peg$parse__() {
    var s0, s1;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    s0 = [];
    s1 = peg$parseWhiteSpace();
    if (s1 === peg$FAILED) {
      s1 = peg$parseLineTerminatorSequence();
      if (s1 === peg$FAILED) {
        s1 = peg$parseComment();
      }
    }
    while (s1 !== peg$FAILED) {
      s0.push(s1);
      s1 = peg$parseWhiteSpace();
      if (s1 === peg$FAILED) {
        s1 = peg$parseLineTerminatorSequence();
        if (s1 === peg$FAILED) {
          s1 = peg$parseComment();
        }
      }
    }

    return s0;
  }

  function peg$parse_() {
    var s0, s1;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    s0 = [];
    s1 = peg$parseWhiteSpace();
    if (s1 === peg$FAILED) {
      s1 = peg$parseMultiLineCommentNoLineTerminator();
    }
    while (s1 !== peg$FAILED) {
      s0.push(s1);
      s1 = peg$parseWhiteSpace();
      if (s1 === peg$FAILED) {
        s1 = peg$parseMultiLineCommentNoLineTerminator();
      }
    }

    return s0;
  }

  function peg$parseEOS() {
    var s0, s1, s2, s3;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    s0 = peg$currPos;
    s1 = peg$parse__();
    rule$expects(peg$e25);
    if (input.charCodeAt(peg$currPos) === 59) {
      s2 = peg$c48;
      peg$currPos++;
    } else {
      s2 = peg$FAILED;
    }
    if (s2 !== peg$FAILED) {
      s1 = [s1, s2];
      s0 = s1;
    } else {
      peg$currPos = s0;
      s0 = peg$FAILED;
    }
    if (s0 === peg$FAILED) {
      s0 = peg$currPos;
      s1 = peg$parse_();
      s2 = peg$parseSingleLineComment();
      if (s2 === peg$FAILED) {
        s2 = null;
      }
      s3 = peg$parseLineTerminatorSequence();
      if (s3 !== peg$FAILED) {
        s1 = [s1, s2, s3];
        s0 = s1;
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }
      if (s0 === peg$FAILED) {
        s0 = peg$currPos;
        s1 = peg$parse__();
        s2 = peg$parseEOF();
        if (s2 !== peg$FAILED) {
          s1 = [s1, s2];
          s0 = s1;
        } else {
          peg$currPos = s0;
          s0 = peg$FAILED;
        }
      }
    }

    return s0;
  }

  function peg$parseEOF() {
    var s0, s1;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    s0 = peg$currPos;
    peg$begin();
    rule$expects(peg$e11);
    if (input.length > peg$currPos) {
      s1 = input.charAt(peg$currPos);
      peg$currPos++;
    } else {
      s1 = peg$FAILED;
    }
    peg$end(true);
    if (s1 === peg$FAILED) {
      s0 = undefined;
    } else {
      peg$currPos = s0;
      s0 = peg$FAILED;
    }

    return s0;
  }


    const OPS_TO_PREFIXED_TYPES = {
      "$": "text",
      "&": "simple_and",
      "!": "simple_not"
    };

    const OPS_TO_SUFFIXED_TYPES = {
      "?": "optional",
      "*": "zero_or_more",
      "+": "one_or_more"
    };

    const OPS_TO_SEMANTIC_PREDICATE_TYPES = {
      "&": "semantic_and",
      "!": "semantic_not"
    };

    const RESERVED_WORDS = [
      "break",
      "case",
      "catch",
      "class",
      "const",
      "continue",
      "debugger",
      "default",
      "delete",
      "do",
      "else",
      "enum",
      "export",
      "extends",
      "false",
      "finally",
      "for",
      "function",
      "if",
      "import",
      "instanceof",
      "in",
      "new",
      "null",
      "return",
      "super",
      "switch",
      "this",
      "throw",
      "true",
      "try",
      "typeof",
      "var",
      "void",
      "while",
      "with"
    ];

    function extractOptional(optional, index) {
      return optional ? optional[index] : null;
    }

    function extractList(list, index) {
      return list.map(element => element[index]);
    }

    function buildList(head, tail, index) {
      return [head].concat(extractList(tail, index));
    }

    function createNode( type, details ) {
      const node = new ast.Node( type, location() );
      util.extend( node, details );
      return util.enforceFastProperties( node );
    }

    let comments = options.extractComments ? {} : null;
    function addComment(comment, multiline) {
      if (options.extractComments) {
        let loc = location();
        comment = {
          text: comment,
          multiline: multiline,
          location: loc
        };
        comments[loc.start.offset] = comment;
        return comment;
      }
    }


  peg$begin();
  peg$result = peg$startRuleFunction();

  if (peg$result !== peg$FAILED && peg$currPos === input.length) {
    return peg$result;
  } else {
    if (peg$result !== peg$FAILED && peg$currPos < input.length) {
      peg$expect(peg$endExpectation());
    }

    throw peg$buildError();
  }
}

module.exports = {
  SyntaxError: peg$SyntaxError,
  parse: peg$parse
};