pegjs/lib/metagrammar.js

PEG.grammarParser = (function(){
  /* Generated by PEG.js (http://pegjs.majda.cz/). */
  
  var result = {
    _startRule: "grammar",
    
    _quoteString: function(s) {
      /*
       * ECMA-262, 5th ed., 7.8.4: All characters may appear literally in a string
       * literal except for the closing quote character, backslash, carriage
       * return, line separator, paragraph separator, and line feed. Any character
       * may appear in the form of an escape sequence.
       */
      return '"' + s
        .replace(/\\/g, '\\\\')        // backslash
        .replace(/"/g, '\\"')          // closing quote character
        .replace(/\r/g, '\\r')         // carriage return
        .replace(/\u2028/g, '\\u2028') // line separator
        .replace(/\u2029/g, '\\u2029') // paragraph separator
        .replace(/\n/g, '\\n')         // line feed
        + '"';
    },
    
    _arrayContains: function(array, value) {
      /*
       * Stupid IE does not have Array.prototype.indexOf, otherwise this function
       * would be a one-liner.
       */
      var length = array.length;
      for (var i = 0; i < length; i++) {
        if (array[i] === value) {
          return true;
        }
      }
      return false;
    },
    
    _matchFailed: function(failure) {
      if (this._pos < this._rightmostMatchFailuresPos) {
        return;
      }
      
      if (this._pos > this._rightmostMatchFailuresPos) {
        this._rightmostMatchFailuresPos = this._pos;
        this._rightmostMatchFailuresExpected = [];
      }
      
      if (!this._arrayContains(this._rightmostMatchFailuresExpected, failure)) {
        this._rightmostMatchFailuresExpected.push(failure);
      }
    },
    
    _parse_grammar: function(context) {
      var cacheKey = "grammar" + '@' + this._pos;
      var cachedResult = this._cache[cacheKey];
      if (cachedResult) {
        this._pos = cachedResult.nextPos;
        return cachedResult.result;
      }
      
      var pos = this._pos;
      
      
      var savedPos0 = this._pos;
      var result2 = this._parse___(context);
      if (result2 !== null) {
        var result4 = this._parse_rule(context);
        if (result4 !== null) {
          var result3 = [];
          while (result4 !== null) {
            result3.push(result4);
            var result4 = this._parse_rule(context);
          }
        } else {
          var result3 = null;
        }
        if (result3 !== null) {
          var result1 = [result2, result3];
        } else {
          var result1 = null;
          this._pos = savedPos0;
        }
      } else {
        var result1 = null;
        this._pos = savedPos0;
      }
      var result0 = result1 !== null
        ? (function($1, $2) { 
          var result = {};
          PEG.ArrayUtils.each($2, function(rule) { result[rule.name] = rule; });
          return result;
         }).apply(null, result1)
        : null;
      
      
      
      this._cache[cacheKey] = {
        nextPos: this._pos,
        result:  result0
      };
      return result0;
    },
    
    _parse_rule: function(context) {
      var cacheKey = "rule" + '@' + this._pos;
      var cachedResult = this._cache[cacheKey];
      if (cachedResult) {
        this._pos = cachedResult.nextPos;
        return cachedResult.result;
      }
      
      var pos = this._pos;
      
      
      var savedPos1 = this._pos;
      var result7 = this._parse_identifier(context);
      if (result7 !== null) {
        var result12 = this._parse_literal(context);
        if (result12 !== null) {
          var result8 = result12;
        } else {
          if (this._input.substr(this._pos, 0) === "") {
            var result11 = "";
            this._pos += 0;
          } else {
            var result11 = null;
            if (context.reportMatchFailures) {
              this._matchFailed(this._quoteString(""));
            }
          }
          if (result11 !== null) {
            var result8 = result11;
          } else {
            var result8 = null;;
          };
        }
        if (result8 !== null) {
          var result9 = this._parse_colon(context);
          if (result9 !== null) {
            var result10 = this._parse_choice(context);
            if (result10 !== null) {
              var result6 = [result7, result8, result9, result10];
            } else {
              var result6 = null;
              this._pos = savedPos1;
            }
          } else {
            var result6 = null;
            this._pos = savedPos1;
          }
        } else {
          var result6 = null;
          this._pos = savedPos1;
        }
      } else {
        var result6 = null;
        this._pos = savedPos1;
      }
      var result5 = result6 !== null
        ? (function($1, $2, $3, $4) { 
          return {
            type:        "rule",
            name:        $1,
            displayName: $2 !== "" ? $2 : null,
            expression:  $4
          };
         }).apply(null, result6)
        : null;
      
      
      
      this._cache[cacheKey] = {
        nextPos: this._pos,
        result:  result5
      };
      return result5;
    },
    
    _parse_choice: function(context) {
      var cacheKey = "choice" + '@' + this._pos;
      var cachedResult = this._cache[cacheKey];
      if (cachedResult) {
        this._pos = cachedResult.nextPos;
        return cachedResult.result;
      }
      
      var pos = this._pos;
      
      
      var savedPos2 = this._pos;
      var result15 = this._parse_sequence(context);
      if (result15 !== null) {
        var result16 = [];
        var savedPos3 = this._pos;
        var result18 = this._parse_slash(context);
        if (result18 !== null) {
          var result19 = this._parse_sequence(context);
          if (result19 !== null) {
            var result17 = [result18, result19];
          } else {
            var result17 = null;
            this._pos = savedPos3;
          }
        } else {
          var result17 = null;
          this._pos = savedPos3;
        }
        while (result17 !== null) {
          result16.push(result17);
          var savedPos3 = this._pos;
          var result18 = this._parse_slash(context);
          if (result18 !== null) {
            var result19 = this._parse_sequence(context);
            if (result19 !== null) {
              var result17 = [result18, result19];
            } else {
              var result17 = null;
              this._pos = savedPos3;
            }
          } else {
            var result17 = null;
            this._pos = savedPos3;
          }
        }
        if (result16 !== null) {
          var result14 = [result15, result16];
        } else {
          var result14 = null;
          this._pos = savedPos2;
        }
      } else {
        var result14 = null;
        this._pos = savedPos2;
      }
      var result13 = result14 !== null
        ? (function($1, $2) { 
          if ($2.length > 0) {
            var alternatives = [$1].concat(PEG.ArrayUtils.map(
                $2,
                function(element) { return element[1]; }
            ));
            return {
              type:         "choice",
              alternatives: alternatives
            }
          } else {
            return $1;
          }
         }).apply(null, result14)
        : null;
      
      
      
      this._cache[cacheKey] = {
        nextPos: this._pos,
        result:  result13
      };
      return result13;
    },
    
    _parse_sequence: function(context) {
      var cacheKey = "sequence" + '@' + this._pos;
      var cachedResult = this._cache[cacheKey];
      if (cachedResult) {
        this._pos = cachedResult.nextPos;
        return cachedResult.result;
      }
      
      var pos = this._pos;
      
      
      var savedPos4 = this._pos;
      var result26 = [];
      var result28 = this._parse_prefixed(context);
      while (result28 !== null) {
        result26.push(result28);
        var result28 = this._parse_prefixed(context);
      }
      if (result26 !== null) {
        var result27 = this._parse_action(context);
        if (result27 !== null) {
          var result25 = [result26, result27];
        } else {
          var result25 = null;
          this._pos = savedPos4;
        }
      } else {
        var result25 = null;
        this._pos = savedPos4;
      }
      var result24 = result25 !== null
        ? (function($1, $2) { 
              var expression = $1.length != 1
                ? {
                    type:     "sequence",
                    elements: $1
                  }
                : $1[0];
              return {
                type:       "action",
                expression: expression,
                action:     $2
              };
             }).apply(null, result25)
        : null;
      if (result24 !== null) {
        var result20 = result24;
      } else {
        var result22 = [];
        var result23 = this._parse_prefixed(context);
        while (result23 !== null) {
          result22.push(result23);
          var result23 = this._parse_prefixed(context);
        }
        var result21 = result22 !== null
          ? (function($1) { 
                return $1.length != 1
                  ? {
                      type:     "sequence",
                      elements: $1
                    }
                  : $1[0];
               })(result22)
          : null;
        if (result21 !== null) {
          var result20 = result21;
        } else {
          var result20 = null;;
        };
      }
      
      
      
      this._cache[cacheKey] = {
        nextPos: this._pos,
        result:  result20
      };
      return result20;
    },
    
    _parse_prefixed: function(context) {
      var cacheKey = "prefixed" + '@' + this._pos;
      var cachedResult = this._cache[cacheKey];
      if (cachedResult) {
        this._pos = cachedResult.nextPos;
        return cachedResult.result;
      }
      
      var pos = this._pos;
      
      
      var savedPos6 = this._pos;
      var result37 = this._parse_and(context);
      if (result37 !== null) {
        var result38 = this._parse_suffixed(context);
        if (result38 !== null) {
          var result36 = [result37, result38];
        } else {
          var result36 = null;
          this._pos = savedPos6;
        }
      } else {
        var result36 = null;
        this._pos = savedPos6;
      }
      var result35 = result36 !== null
        ? (function($1, $2) {  return { type: "and_predicate", expression: $2 };  }).apply(null, result36)
        : null;
      if (result35 !== null) {
        var result29 = result35;
      } else {
        var savedPos5 = this._pos;
        var result33 = this._parse_not(context);
        if (result33 !== null) {
          var result34 = this._parse_suffixed(context);
          if (result34 !== null) {
            var result32 = [result33, result34];
          } else {
            var result32 = null;
            this._pos = savedPos5;
          }
        } else {
          var result32 = null;
          this._pos = savedPos5;
        }
        var result31 = result32 !== null
          ? (function($1, $2) {  return { type: "not_predicate", expression: $2 };  }).apply(null, result32)
          : null;
        if (result31 !== null) {
          var result29 = result31;
        } else {
          var result30 = this._parse_suffixed(context);
          if (result30 !== null) {
            var result29 = result30;
          } else {
            var result29 = null;;
          };
        };
      }
      
      
      
      this._cache[cacheKey] = {
        nextPos: this._pos,
        result:  result29
      };
      return result29;
    },
    
    _parse_suffixed: function(context) {
      var cacheKey = "suffixed" + '@' + this._pos;
      var cachedResult = this._cache[cacheKey];
      if (cachedResult) {
        this._pos = cachedResult.nextPos;
        return cachedResult.result;
      }
      
      var pos = this._pos;
      
      
      var savedPos9 = this._pos;
      var result51 = this._parse_primary(context);
      if (result51 !== null) {
        var result52 = this._parse_question(context);
        if (result52 !== null) {
          var result50 = [result51, result52];
        } else {
          var result50 = null;
          this._pos = savedPos9;
        }
      } else {
        var result50 = null;
        this._pos = savedPos9;
      }
      var result49 = result50 !== null
        ? (function($1, $2) {  return { type: "optional",     expression: $1};  }).apply(null, result50)
        : null;
      if (result49 !== null) {
        var result39 = result49;
      } else {
        var savedPos8 = this._pos;
        var result47 = this._parse_primary(context);
        if (result47 !== null) {
          var result48 = this._parse_star(context);
          if (result48 !== null) {
            var result46 = [result47, result48];
          } else {
            var result46 = null;
            this._pos = savedPos8;
          }
        } else {
          var result46 = null;
          this._pos = savedPos8;
        }
        var result45 = result46 !== null
          ? (function($1, $2) {  return { type: "zero_or_more", expression: $1};  }).apply(null, result46)
          : null;
        if (result45 !== null) {
          var result39 = result45;
        } else {
          var savedPos7 = this._pos;
          var result43 = this._parse_primary(context);
          if (result43 !== null) {
            var result44 = this._parse_plus(context);
            if (result44 !== null) {
              var result42 = [result43, result44];
            } else {
              var result42 = null;
              this._pos = savedPos7;
            }
          } else {
            var result42 = null;
            this._pos = savedPos7;
          }
          var result41 = result42 !== null
            ? (function($1, $2) {  return { type: "one_or_more",  expression: $1};  }).apply(null, result42)
            : null;
          if (result41 !== null) {
            var result39 = result41;
          } else {
            var result40 = this._parse_primary(context);
            if (result40 !== null) {
              var result39 = result40;
            } else {
              var result39 = null;;
            };
          };
        };
      }
      
      
      
      this._cache[cacheKey] = {
        nextPos: this._pos,
        result:  result39
      };
      return result39;
    },
    
    _parse_primary: function(context) {
      var cacheKey = "primary" + '@' + this._pos;
      var cachedResult = this._cache[cacheKey];
      if (cachedResult) {
        this._pos = cachedResult.nextPos;
        return cachedResult.result;
      }
      
      var pos = this._pos;
      
      
      var savedPos11 = this._pos;
      var result66 = this._parse_identifier(context);
      if (result66 !== null) {
        var savedPos12 = this._pos;
        var savedReportMatchFailuresVar0 = context.reportMatchFailures;
        context.reportMatchFailures = false;
        var savedPos13 = this._pos;
        var result72 = this._parse_literal(context);
        if (result72 !== null) {
          var result69 = result72;
        } else {
          if (this._input.substr(this._pos, 0) === "") {
            var result71 = "";
            this._pos += 0;
          } else {
            var result71 = null;
            if (context.reportMatchFailures) {
              this._matchFailed(this._quoteString(""));
            }
          }
          if (result71 !== null) {
            var result69 = result71;
          } else {
            var result69 = null;;
          };
        }
        if (result69 !== null) {
          var result70 = this._parse_colon(context);
          if (result70 !== null) {
            var result68 = [result69, result70];
          } else {
            var result68 = null;
            this._pos = savedPos13;
          }
        } else {
          var result68 = null;
          this._pos = savedPos13;
        }
        context.reportMatchFailures = savedReportMatchFailuresVar0;
        if (result68 === null) {
          var result67 = '';
        } else {
          var result67 = null;
          this._pos = savedPos12;
        }
        if (result67 !== null) {
          var result65 = [result66, result67];
        } else {
          var result65 = null;
          this._pos = savedPos11;
        }
      } else {
        var result65 = null;
        this._pos = savedPos11;
      }
      var result64 = result65 !== null
        ? (function($1, $2) {  return { type: "rule_ref", name:  $1 };  }).apply(null, result65)
        : null;
      if (result64 !== null) {
        var result53 = result64;
      } else {
        var result63 = this._parse_literal(context);
        var result62 = result63 !== null
          ? (function($1) {  return { type: "literal",  value: $1 };  })(result63)
          : null;
        if (result62 !== null) {
          var result53 = result62;
        } else {
          var result61 = this._parse_dot(context);
          var result60 = result61 !== null
            ? (function($1) {  return { type: "any"                 };  })(result61)
            : null;
          if (result60 !== null) {
            var result53 = result60;
          } else {
            var result59 = this._parse_class(context);
            if (result59 !== null) {
              var result53 = result59;
            } else {
              var savedPos10 = this._pos;
              var result56 = this._parse_lparen(context);
              if (result56 !== null) {
                var result57 = this._parse_choice(context);
                if (result57 !== null) {
                  var result58 = this._parse_rparen(context);
                  if (result58 !== null) {
                    var result55 = [result56, result57, result58];
                  } else {
                    var result55 = null;
                    this._pos = savedPos10;
                  }
                } else {
                  var result55 = null;
                  this._pos = savedPos10;
                }
              } else {
                var result55 = null;
                this._pos = savedPos10;
              }
              var result54 = result55 !== null
                ? (function($1, $2, $3) {  return $2;  }).apply(null, result55)
                : null;
              if (result54 !== null) {
                var result53 = result54;
              } else {
                var result53 = null;;
              };
            };
          };
        };
      }
      
      
      
      this._cache[cacheKey] = {
        nextPos: this._pos,
        result:  result53
      };
      return result53;
    },
    
    _parse_action: function(context) {
      var cacheKey = "action" + '@' + this._pos;
      var cachedResult = this._cache[cacheKey];
      if (cachedResult) {
        this._pos = cachedResult.nextPos;
        return cachedResult.result;
      }
      
      var pos = this._pos;
      
      var savedReportMatchFailures = context.reportMatchFailures;
      context.reportMatchFailures = false;
      var savedPos14 = this._pos;
      var result75 = this._parse_braced(context);
      if (result75 !== null) {
        var result76 = this._parse___(context);
        if (result76 !== null) {
          var result74 = [result75, result76];
        } else {
          var result74 = null;
          this._pos = savedPos14;
        }
      } else {
        var result74 = null;
        this._pos = savedPos14;
      }
      var result73 = result74 !== null
        ? (function($1, $2) {  return $1.substr(1, $1.length - 2);  }).apply(null, result74)
        : null;
      context.reportMatchFailures = savedReportMatchFailures;
      if (context.reportMatchFailures && result73 === null) {
        this._matchFailed("action");
      }
      
      this._cache[cacheKey] = {
        nextPos: this._pos,
        result:  result73
      };
      return result73;
    },
    
    _parse_braced: function(context) {
      var cacheKey = "braced" + '@' + this._pos;
      var cachedResult = this._cache[cacheKey];
      if (cachedResult) {
        this._pos = cachedResult.nextPos;
        return cachedResult.result;
      }
      
      var pos = this._pos;
      
      
      var savedPos15 = this._pos;
      if (this._input.substr(this._pos, 1) === "{") {
        var result79 = "{";
        this._pos += 1;
      } else {
        var result79 = null;
        if (context.reportMatchFailures) {
          this._matchFailed(this._quoteString("{"));
        }
      }
      if (result79 !== null) {
        var result80 = [];
        var result84 = this._parse_braced(context);
        if (result84 !== null) {
          var result82 = result84;
        } else {
          var result83 = this._parse_nonBraceCharacter(context);
          if (result83 !== null) {
            var result82 = result83;
          } else {
            var result82 = null;;
          };
        }
        while (result82 !== null) {
          result80.push(result82);
          var result84 = this._parse_braced(context);
          if (result84 !== null) {
            var result82 = result84;
          } else {
            var result83 = this._parse_nonBraceCharacter(context);
            if (result83 !== null) {
              var result82 = result83;
            } else {
              var result82 = null;;
            };
          }
        }
        if (result80 !== null) {
          if (this._input.substr(this._pos, 1) === "}") {
            var result81 = "}";
            this._pos += 1;
          } else {
            var result81 = null;
            if (context.reportMatchFailures) {
              this._matchFailed(this._quoteString("}"));
            }
          }
          if (result81 !== null) {
            var result78 = [result79, result80, result81];
          } else {
            var result78 = null;
            this._pos = savedPos15;
          }
        } else {
          var result78 = null;
          this._pos = savedPos15;
        }
      } else {
        var result78 = null;
        this._pos = savedPos15;
      }
      var result77 = result78 !== null
        ? (function($1, $2, $3) {  return $1 + $2.join("") + $3;  }).apply(null, result78)
        : null;
      
      
      
      this._cache[cacheKey] = {
        nextPos: this._pos,
        result:  result77
      };
      return result77;
    },
    
    _parse_nonBraceCharacters: function(context) {
      var cacheKey = "nonBraceCharacters" + '@' + this._pos;
      var cachedResult = this._cache[cacheKey];
      if (cachedResult) {
        this._pos = cachedResult.nextPos;
        return cachedResult.result;
      }
      
      var pos = this._pos;
      
      
      var result87 = this._parse_nonBraceCharacter(context);
      if (result87 !== null) {
        var result86 = [];
        while (result87 !== null) {
          result86.push(result87);
          var result87 = this._parse_nonBraceCharacter(context);
        }
      } else {
        var result86 = null;
      }
      var result85 = result86 !== null
        ? (function($1) {  return $1.join("");  })(result86)
        : null;
      
      
      
      this._cache[cacheKey] = {
        nextPos: this._pos,
        result:  result85
      };
      return result85;
    },
    
    _parse_nonBraceCharacter: function(context) {
      var cacheKey = "nonBraceCharacter" + '@' + this._pos;
      var cachedResult = this._cache[cacheKey];
      if (cachedResult) {
        this._pos = cachedResult.nextPos;
        return cachedResult.result;
      }
      
      var pos = this._pos;
      
      
      if (this._input.substr(this._pos).match(/^[^{}]/) !== null) {
        var result88 = this._input.charAt(this._pos);
        this._pos++;
      } else {
        var result88 = null;
        if (context.reportMatchFailures) {
          this._matchFailed("[^{}]");
        }
      }
      
      
      
      this._cache[cacheKey] = {
        nextPos: this._pos,
        result:  result88
      };
      return result88;
    },
    
    _parse_colon: function(context) {
      var cacheKey = "colon" + '@' + this._pos;
      var cachedResult = this._cache[cacheKey];
      if (cachedResult) {
        this._pos = cachedResult.nextPos;
        return cachedResult.result;
      }
      
      var pos = this._pos;
      
      
      var savedPos16 = this._pos;
      if (this._input.substr(this._pos, 1) === ":") {
        var result91 = ":";
        this._pos += 1;
      } else {
        var result91 = null;
        if (context.reportMatchFailures) {
          this._matchFailed(this._quoteString(":"));
        }
      }
      if (result91 !== null) {
        var result92 = this._parse___(context);
        if (result92 !== null) {
          var result90 = [result91, result92];
        } else {
          var result90 = null;
          this._pos = savedPos16;
        }
      } else {
        var result90 = null;
        this._pos = savedPos16;
      }
      var result89 = result90 !== null
        ? (function($1, $2) {  return $1;  }).apply(null, result90)
        : null;
      
      
      
      this._cache[cacheKey] = {
        nextPos: this._pos,
        result:  result89
      };
      return result89;
    },
    
    _parse_slash: function(context) {
      var cacheKey = "slash" + '@' + this._pos;
      var cachedResult = this._cache[cacheKey];
      if (cachedResult) {
        this._pos = cachedResult.nextPos;
        return cachedResult.result;
      }
      
      var pos = this._pos;
      
      
      var savedPos17 = this._pos;
      if (this._input.substr(this._pos, 1) === "/") {
        var result95 = "/";
        this._pos += 1;
      } else {
        var result95 = null;
        if (context.reportMatchFailures) {
          this._matchFailed(this._quoteString("/"));
        }
      }
      if (result95 !== null) {
        var result96 = this._parse___(context);
        if (result96 !== null) {
          var result94 = [result95, result96];
        } else {
          var result94 = null;
          this._pos = savedPos17;
        }
      } else {
        var result94 = null;
        this._pos = savedPos17;
      }
      var result93 = result94 !== null
        ? (function($1, $2) {  return $1;  }).apply(null, result94)
        : null;
      
      
      
      this._cache[cacheKey] = {
        nextPos: this._pos,
        result:  result93
      };
      return result93;
    },
    
    _parse_and: function(context) {
      var cacheKey = "and" + '@' + this._pos;
      var cachedResult = this._cache[cacheKey];
      if (cachedResult) {
        this._pos = cachedResult.nextPos;
        return cachedResult.result;
      }
      
      var pos = this._pos;
      
      
      var savedPos18 = this._pos;
      if (this._input.substr(this._pos, 1) === "&") {
        var result99 = "&";
        this._pos += 1;
      } else {
        var result99 = null;
        if (context.reportMatchFailures) {
          this._matchFailed(this._quoteString("&"));
        }
      }
      if (result99 !== null) {
        var result100 = this._parse___(context);
        if (result100 !== null) {
          var result98 = [result99, result100];
        } else {
          var result98 = null;
          this._pos = savedPos18;
        }
      } else {
        var result98 = null;
        this._pos = savedPos18;
      }
      var result97 = result98 !== null
        ? (function($1, $2) {  return $1;  }).apply(null, result98)
        : null;
      
      
      
      this._cache[cacheKey] = {
        nextPos: this._pos,
        result:  result97
      };
      return result97;
    },
    
    _parse_not: function(context) {
      var cacheKey = "not" + '@' + this._pos;
      var cachedResult = this._cache[cacheKey];
      if (cachedResult) {
        this._pos = cachedResult.nextPos;
        return cachedResult.result;
      }
      
      var pos = this._pos;
      
      
      var savedPos19 = this._pos;
      if (this._input.substr(this._pos, 1) === "!") {
        var result103 = "!";
        this._pos += 1;
      } else {
        var result103 = null;
        if (context.reportMatchFailures) {
          this._matchFailed(this._quoteString("!"));
        }
      }
      if (result103 !== null) {
        var result104 = this._parse___(context);
        if (result104 !== null) {
          var result102 = [result103, result104];
        } else {
          var result102 = null;
          this._pos = savedPos19;
        }
      } else {
        var result102 = null;
        this._pos = savedPos19;
      }
      var result101 = result102 !== null
        ? (function($1, $2) {  return $1;  }).apply(null, result102)
        : null;
      
      
      
      this._cache[cacheKey] = {
        nextPos: this._pos,
        result:  result101
      };
      return result101;
    },
    
    _parse_question: function(context) {
      var cacheKey = "question" + '@' + this._pos;
      var cachedResult = this._cache[cacheKey];
      if (cachedResult) {
        this._pos = cachedResult.nextPos;
        return cachedResult.result;
      }
      
      var pos = this._pos;
      
      
      var savedPos20 = this._pos;
      if (this._input.substr(this._pos, 1) === "?") {
        var result107 = "?";
        this._pos += 1;
      } else {
        var result107 = null;
        if (context.reportMatchFailures) {
          this._matchFailed(this._quoteString("?"));
        }
      }
      if (result107 !== null) {
        var result108 = this._parse___(context);
        if (result108 !== null) {
          var result106 = [result107, result108];
        } else {
          var result106 = null;
          this._pos = savedPos20;
        }
      } else {
        var result106 = null;
        this._pos = savedPos20;
      }
      var result105 = result106 !== null
        ? (function($1, $2) {  return $1;  }).apply(null, result106)
        : null;
      
      
      
      this._cache[cacheKey] = {
        nextPos: this._pos,
        result:  result105
      };
      return result105;
    },
    
    _parse_star: function(context) {
      var cacheKey = "star" + '@' + this._pos;
      var cachedResult = this._cache[cacheKey];
      if (cachedResult) {
        this._pos = cachedResult.nextPos;
        return cachedResult.result;
      }
      
      var pos = this._pos;
      
      
      var savedPos21 = this._pos;
      if (this._input.substr(this._pos, 1) === "*") {
        var result111 = "*";
        this._pos += 1;
      } else {
        var result111 = null;
        if (context.reportMatchFailures) {
          this._matchFailed(this._quoteString("*"));
        }
      }
      if (result111 !== null) {
        var result112 = this._parse___(context);
        if (result112 !== null) {
          var result110 = [result111, result112];
        } else {
          var result110 = null;
          this._pos = savedPos21;
        }
      } else {
        var result110 = null;
        this._pos = savedPos21;
      }
      var result109 = result110 !== null
        ? (function($1, $2) {  return $1;  }).apply(null, result110)
        : null;
      
      
      
      this._cache[cacheKey] = {
        nextPos: this._pos,
        result:  result109
      };
      return result109;
    },
    
    _parse_plus: function(context) {
      var cacheKey = "plus" + '@' + this._pos;
      var cachedResult = this._cache[cacheKey];
      if (cachedResult) {
        this._pos = cachedResult.nextPos;
        return cachedResult.result;
      }
      
      var pos = this._pos;
      
      
      var savedPos22 = this._pos;
      if (this._input.substr(this._pos, 1) === "+") {
        var result115 = "+";
        this._pos += 1;
      } else {
        var result115 = null;
        if (context.reportMatchFailures) {
          this._matchFailed(this._quoteString("+"));
        }
      }
      if (result115 !== null) {
        var result116 = this._parse___(context);
        if (result116 !== null) {
          var result114 = [result115, result116];
        } else {
          var result114 = null;
          this._pos = savedPos22;
        }
      } else {
        var result114 = null;
        this._pos = savedPos22;
      }
      var result113 = result114 !== null
        ? (function($1, $2) {  return $1;  }).apply(null, result114)
        : null;
      
      
      
      this._cache[cacheKey] = {
        nextPos: this._pos,
        result:  result113
      };
      return result113;
    },
    
    _parse_lparen: function(context) {
      var cacheKey = "lparen" + '@' + this._pos;
      var cachedResult = this._cache[cacheKey];
      if (cachedResult) {
        this._pos = cachedResult.nextPos;
        return cachedResult.result;
      }
      
      var pos = this._pos;
      
      
      var savedPos23 = this._pos;
      if (this._input.substr(this._pos, 1) === "(") {
        var result119 = "(";
        this._pos += 1;
      } else {
        var result119 = null;
        if (context.reportMatchFailures) {
          this._matchFailed(this._quoteString("("));
        }
      }
      if (result119 !== null) {
        var result120 = this._parse___(context);
        if (result120 !== null) {
          var result118 = [result119, result120];
        } else {
          var result118 = null;
          this._pos = savedPos23;
        }
      } else {
        var result118 = null;
        this._pos = savedPos23;
      }
      var result117 = result118 !== null
        ? (function($1, $2) {  return $1;  }).apply(null, result118)
        : null;
      
      
      
      this._cache[cacheKey] = {
        nextPos: this._pos,
        result:  result117
      };
      return result117;
    },
    
    _parse_rparen: function(context) {
      var cacheKey = "rparen" + '@' + this._pos;
      var cachedResult = this._cache[cacheKey];
      if (cachedResult) {
        this._pos = cachedResult.nextPos;
        return cachedResult.result;
      }
      
      var pos = this._pos;
      
      
      var savedPos24 = this._pos;
      if (this._input.substr(this._pos, 1) === ")") {
        var result123 = ")";
        this._pos += 1;
      } else {
        var result123 = null;
        if (context.reportMatchFailures) {
          this._matchFailed(this._quoteString(")"));
        }
      }
      if (result123 !== null) {
        var result124 = this._parse___(context);
        if (result124 !== null) {
          var result122 = [result123, result124];
        } else {
          var result122 = null;
          this._pos = savedPos24;
        }
      } else {
        var result122 = null;
        this._pos = savedPos24;
      }
      var result121 = result122 !== null
        ? (function($1, $2) {  return $1;  }).apply(null, result122)
        : null;
      
      
      
      this._cache[cacheKey] = {
        nextPos: this._pos,
        result:  result121
      };
      return result121;
    },
    
    _parse_dot: function(context) {
      var cacheKey = "dot" + '@' + this._pos;
      var cachedResult = this._cache[cacheKey];
      if (cachedResult) {
        this._pos = cachedResult.nextPos;
        return cachedResult.result;
      }
      
      var pos = this._pos;
      
      
      var savedPos25 = this._pos;
      if (this._input.substr(this._pos, 1) === ".") {
        var result127 = ".";
        this._pos += 1;
      } else {
        var result127 = null;
        if (context.reportMatchFailures) {
          this._matchFailed(this._quoteString("."));
        }
      }
      if (result127 !== null) {
        var result128 = this._parse___(context);
        if (result128 !== null) {
          var result126 = [result127, result128];
        } else {
          var result126 = null;
          this._pos = savedPos25;
        }
      } else {
        var result126 = null;
        this._pos = savedPos25;
      }
      var result125 = result126 !== null
        ? (function($1, $2) {  return $1;  }).apply(null, result126)
        : null;
      
      
      
      this._cache[cacheKey] = {
        nextPos: this._pos,
        result:  result125
      };
      return result125;
    },
    
    _parse_identifier: function(context) {
      var cacheKey = "identifier" + '@' + this._pos;
      var cachedResult = this._cache[cacheKey];
      if (cachedResult) {
        this._pos = cachedResult.nextPos;
        return cachedResult.result;
      }
      
      var pos = this._pos;
      
      var savedReportMatchFailures = context.reportMatchFailures;
      context.reportMatchFailures = false;
      var savedPos26 = this._pos;
      var result141 = this._parse_letter(context);
      if (result141 !== null) {
        var result131 = result141;
      } else {
        if (this._input.substr(this._pos, 1) === "_") {
          var result140 = "_";
          this._pos += 1;
        } else {
          var result140 = null;
          if (context.reportMatchFailures) {
            this._matchFailed(this._quoteString("_"));
          }
        }
        if (result140 !== null) {
          var result131 = result140;
        } else {
          if (this._input.substr(this._pos, 1) === "$") {
            var result139 = "$";
            this._pos += 1;
          } else {
            var result139 = null;
            if (context.reportMatchFailures) {
              this._matchFailed(this._quoteString("$"));
            }
          }
          if (result139 !== null) {
            var result131 = result139;
          } else {
            var result131 = null;;
          };
        };
      }
      if (result131 !== null) {
        var result132 = [];
        var result138 = this._parse_letter(context);
        if (result138 !== null) {
          var result134 = result138;
        } else {
          var result137 = this._parse_digit(context);
          if (result137 !== null) {
            var result134 = result137;
          } else {
            if (this._input.substr(this._pos, 1) === "_") {
              var result136 = "_";
              this._pos += 1;
            } else {
              var result136 = null;
              if (context.reportMatchFailures) {
                this._matchFailed(this._quoteString("_"));
              }
            }
            if (result136 !== null) {
              var result134 = result136;
            } else {
              if (this._input.substr(this._pos, 1) === "$") {
                var result135 = "$";
                this._pos += 1;
              } else {
                var result135 = null;
                if (context.reportMatchFailures) {
                  this._matchFailed(this._quoteString("$"));
                }
              }
              if (result135 !== null) {
                var result134 = result135;
              } else {
                var result134 = null;;
              };
            };
          };
        }
        while (result134 !== null) {
          result132.push(result134);
          var result138 = this._parse_letter(context);
          if (result138 !== null) {
            var result134 = result138;
          } else {
            var result137 = this._parse_digit(context);
            if (result137 !== null) {
              var result134 = result137;
            } else {
              if (this._input.substr(this._pos, 1) === "_") {
                var result136 = "_";
                this._pos += 1;
              } else {
                var result136 = null;
                if (context.reportMatchFailures) {
                  this._matchFailed(this._quoteString("_"));
                }
              }
              if (result136 !== null) {
                var result134 = result136;
              } else {
                if (this._input.substr(this._pos, 1) === "$") {
                  var result135 = "$";
                  this._pos += 1;
                } else {
                  var result135 = null;
                  if (context.reportMatchFailures) {
                    this._matchFailed(this._quoteString("$"));
                  }
                }
                if (result135 !== null) {
                  var result134 = result135;
                } else {
                  var result134 = null;;
                };
              };
            };
          }
        }
        if (result132 !== null) {
          var result133 = this._parse___(context);
          if (result133 !== null) {
            var result130 = [result131, result132, result133];
          } else {
            var result130 = null;
            this._pos = savedPos26;
          }
        } else {
          var result130 = null;
          this._pos = savedPos26;
        }
      } else {
        var result130 = null;
        this._pos = savedPos26;
      }
      var result129 = result130 !== null
        ? (function($1, $2, $3) { 
          return $1 + $2.join("");
         }).apply(null, result130)
        : null;
      context.reportMatchFailures = savedReportMatchFailures;
      if (context.reportMatchFailures && result129 === null) {
        this._matchFailed("identifier");
      }
      
      this._cache[cacheKey] = {
        nextPos: this._pos,
        result:  result129
      };
      return result129;
    },
    
    _parse_literal: function(context) {
      var cacheKey = "literal" + '@' + this._pos;
      var cachedResult = this._cache[cacheKey];
      if (cachedResult) {
        this._pos = cachedResult.nextPos;
        return cachedResult.result;
      }
      
      var pos = this._pos;
      
      var savedReportMatchFailures = context.reportMatchFailures;
      context.reportMatchFailures = false;
      var savedPos27 = this._pos;
      var result147 = this._parse_doubleQuotedLiteral(context);
      if (result147 !== null) {
        var result144 = result147;
      } else {
        var result146 = this._parse_singleQuotedLiteral(context);
        if (result146 !== null) {
          var result144 = result146;
        } else {
          var result144 = null;;
        };
      }
      if (result144 !== null) {
        var result145 = this._parse___(context);
        if (result145 !== null) {
          var result143 = [result144, result145];
        } else {
          var result143 = null;
          this._pos = savedPos27;
        }
      } else {
        var result143 = null;
        this._pos = savedPos27;
      }
      var result142 = result143 !== null
        ? (function($1, $2) {  return $1;  }).apply(null, result143)
        : null;
      context.reportMatchFailures = savedReportMatchFailures;
      if (context.reportMatchFailures && result142 === null) {
        this._matchFailed("literal");
      }
      
      this._cache[cacheKey] = {
        nextPos: this._pos,
        result:  result142
      };
      return result142;
    },
    
    _parse_doubleQuotedLiteral: function(context) {
      var cacheKey = "doubleQuotedLiteral" + '@' + this._pos;
      var cachedResult = this._cache[cacheKey];
      if (cachedResult) {
        this._pos = cachedResult.nextPos;
        return cachedResult.result;
      }
      
      var pos = this._pos;
      
      
      var savedPos28 = this._pos;
      if (this._input.substr(this._pos, 1) === "\"") {
        var result150 = "\"";
        this._pos += 1;
      } else {
        var result150 = null;
        if (context.reportMatchFailures) {
          this._matchFailed(this._quoteString("\""));
        }
      }
      if (result150 !== null) {
        var result151 = [];
        var result153 = this._parse_doubleQuotedCharacter(context);
        while (result153 !== null) {
          result151.push(result153);
          var result153 = this._parse_doubleQuotedCharacter(context);
        }
        if (result151 !== null) {
          if (this._input.substr(this._pos, 1) === "\"") {
            var result152 = "\"";
            this._pos += 1;
          } else {
            var result152 = null;
            if (context.reportMatchFailures) {
              this._matchFailed(this._quoteString("\""));
            }
          }
          if (result152 !== null) {
            var result149 = [result150, result151, result152];
          } else {
            var result149 = null;
            this._pos = savedPos28;
          }
        } else {
          var result149 = null;
          this._pos = savedPos28;
        }
      } else {
        var result149 = null;
        this._pos = savedPos28;
      }
      var result148 = result149 !== null
        ? (function($1, $2, $3) {  return $2.join("");  }).apply(null, result149)
        : null;
      
      
      
      this._cache[cacheKey] = {
        nextPos: this._pos,
        result:  result148
      };
      return result148;
    },
    
    _parse_doubleQuotedCharacter: function(context) {
      var cacheKey = "doubleQuotedCharacter" + '@' + this._pos;
      var cachedResult = this._cache[cacheKey];
      if (cachedResult) {
        this._pos = cachedResult.nextPos;
        return cachedResult.result;
      }
      
      var pos = this._pos;
      
      
      var result160 = this._parse_simpleDoubleQuotedCharacter(context);
      if (result160 !== null) {
        var result154 = result160;
      } else {
        var result159 = this._parse_simpleEscapeSequence(context);
        if (result159 !== null) {
          var result154 = result159;
        } else {
          var result158 = this._parse_zeroEscapeSequence(context);
          if (result158 !== null) {
            var result154 = result158;
          } else {
            var result157 = this._parse_hexEscapeSequence(context);
            if (result157 !== null) {
              var result154 = result157;
            } else {
              var result156 = this._parse_unicodeEscapeSequence(context);
              if (result156 !== null) {
                var result154 = result156;
              } else {
                var result155 = this._parse_eolEscapeSequence(context);
                if (result155 !== null) {
                  var result154 = result155;
                } else {
                  var result154 = null;;
                };
              };
            };
          };
        };
      }
      
      
      
      this._cache[cacheKey] = {
        nextPos: this._pos,
        result:  result154
      };
      return result154;
    },
    
    _parse_simpleDoubleQuotedCharacter: function(context) {
      var cacheKey = "simpleDoubleQuotedCharacter" + '@' + this._pos;
      var cachedResult = this._cache[cacheKey];
      if (cachedResult) {
        this._pos = cachedResult.nextPos;
        return cachedResult.result;
      }
      
      var pos = this._pos;
      
      
      var savedPos29 = this._pos;
      var savedPos30 = this._pos;
      var savedReportMatchFailuresVar1 = context.reportMatchFailures;
      context.reportMatchFailures = false;
      if (this._input.substr(this._pos, 1) === "\"") {
        var result168 = "\"";
        this._pos += 1;
      } else {
        var result168 = null;
        if (context.reportMatchFailures) {
          this._matchFailed(this._quoteString("\""));
        }
      }
      if (result168 !== null) {
        var result165 = result168;
      } else {
        if (this._input.substr(this._pos, 1) === "\\") {
          var result167 = "\\";
          this._pos += 1;
        } else {
          var result167 = null;
          if (context.reportMatchFailures) {
            this._matchFailed(this._quoteString("\\"));
          }
        }
        if (result167 !== null) {
          var result165 = result167;
        } else {
          var result166 = this._parse_eolChar(context);
          if (result166 !== null) {
            var result165 = result166;
          } else {
            var result165 = null;;
          };
        };
      }
      context.reportMatchFailures = savedReportMatchFailuresVar1;
      if (result165 === null) {
        var result163 = '';
      } else {
        var result163 = null;
        this._pos = savedPos30;
      }
      if (result163 !== null) {
        if (this._input.length > this._pos) {
          var result164 = this._input.charAt(this._pos);
          this._pos++;
        } else {
          var result164 = null;
          if (context.reportMatchFailures) {
            this._matchFailed('any character');
          }
        }
        if (result164 !== null) {
          var result162 = [result163, result164];
        } else {
          var result162 = null;
          this._pos = savedPos29;
        }
      } else {
        var result162 = null;
        this._pos = savedPos29;
      }
      var result161 = result162 !== null
        ? (function($1, $2) {  return $2;  }).apply(null, result162)
        : null;
      
      
      
      this._cache[cacheKey] = {
        nextPos: this._pos,
        result:  result161
      };
      return result161;
    },
    
    _parse_singleQuotedLiteral: function(context) {
      var cacheKey = "singleQuotedLiteral" + '@' + this._pos;
      var cachedResult = this._cache[cacheKey];
      if (cachedResult) {
        this._pos = cachedResult.nextPos;
        return cachedResult.result;
      }
      
      var pos = this._pos;
      
      
      var savedPos31 = this._pos;
      if (this._input.substr(this._pos, 1) === "'") {
        var result171 = "'";
        this._pos += 1;
      } else {
        var result171 = null;
        if (context.reportMatchFailures) {
          this._matchFailed(this._quoteString("'"));
        }
      }
      if (result171 !== null) {
        var result172 = [];
        var result174 = this._parse_singleQuotedCharacter(context);
        while (result174 !== null) {
          result172.push(result174);
          var result174 = this._parse_singleQuotedCharacter(context);
        }
        if (result172 !== null) {
          if (this._input.substr(this._pos, 1) === "'") {
            var result173 = "'";
            this._pos += 1;
          } else {
            var result173 = null;
            if (context.reportMatchFailures) {
              this._matchFailed(this._quoteString("'"));
            }
          }
          if (result173 !== null) {
            var result170 = [result171, result172, result173];
          } else {
            var result170 = null;
            this._pos = savedPos31;
          }
        } else {
          var result170 = null;
          this._pos = savedPos31;
        }
      } else {
        var result170 = null;
        this._pos = savedPos31;
      }
      var result169 = result170 !== null
        ? (function($1, $2, $3) {  return $2.join("");  }).apply(null, result170)
        : null;
      
      
      
      this._cache[cacheKey] = {
        nextPos: this._pos,
        result:  result169
      };
      return result169;
    },
    
    _parse_singleQuotedCharacter: function(context) {
      var cacheKey = "singleQuotedCharacter" + '@' + this._pos;
      var cachedResult = this._cache[cacheKey];
      if (cachedResult) {
        this._pos = cachedResult.nextPos;
        return cachedResult.result;
      }
      
      var pos = this._pos;
      
      
      var result181 = this._parse_simpleSingleQuotedCharacter(context);
      if (result181 !== null) {
        var result175 = result181;
      } else {
        var result180 = this._parse_simpleEscapeSequence(context);
        if (result180 !== null) {
          var result175 = result180;
        } else {
          var result179 = this._parse_zeroEscapeSequence(context);
          if (result179 !== null) {
            var result175 = result179;
          } else {
            var result178 = this._parse_hexEscapeSequence(context);
            if (result178 !== null) {
              var result175 = result178;
            } else {
              var result177 = this._parse_unicodeEscapeSequence(context);
              if (result177 !== null) {
                var result175 = result177;
              } else {
                var result176 = this._parse_eolEscapeSequence(context);
                if (result176 !== null) {
                  var result175 = result176;
                } else {
                  var result175 = null;;
                };
              };
            };
          };
        };
      }
      
      
      
      this._cache[cacheKey] = {
        nextPos: this._pos,
        result:  result175
      };
      return result175;
    },
    
    _parse_simpleSingleQuotedCharacter: function(context) {
      var cacheKey = "simpleSingleQuotedCharacter" + '@' + this._pos;
      var cachedResult = this._cache[cacheKey];
      if (cachedResult) {
        this._pos = cachedResult.nextPos;
        return cachedResult.result;
      }
      
      var pos = this._pos;
      
      
      var savedPos32 = this._pos;
      var savedPos33 = this._pos;
      var savedReportMatchFailuresVar2 = context.reportMatchFailures;
      context.reportMatchFailures = false;
      if (this._input.substr(this._pos, 1) === "'") {
        var result189 = "'";
        this._pos += 1;
      } else {
        var result189 = null;
        if (context.reportMatchFailures) {
          this._matchFailed(this._quoteString("'"));
        }
      }
      if (result189 !== null) {
        var result186 = result189;
      } else {
        if (this._input.substr(this._pos, 1) === "\\") {
          var result188 = "\\";
          this._pos += 1;
        } else {
          var result188 = null;
          if (context.reportMatchFailures) {
            this._matchFailed(this._quoteString("\\"));
          }
        }
        if (result188 !== null) {
          var result186 = result188;
        } else {
          var result187 = this._parse_eolChar(context);
          if (result187 !== null) {
            var result186 = result187;
          } else {
            var result186 = null;;
          };
        };
      }
      context.reportMatchFailures = savedReportMatchFailuresVar2;
      if (result186 === null) {
        var result184 = '';
      } else {
        var result184 = null;
        this._pos = savedPos33;
      }
      if (result184 !== null) {
        if (this._input.length > this._pos) {
          var result185 = this._input.charAt(this._pos);
          this._pos++;
        } else {
          var result185 = null;
          if (context.reportMatchFailures) {
            this._matchFailed('any character');
          }
        }
        if (result185 !== null) {
          var result183 = [result184, result185];
        } else {
          var result183 = null;
          this._pos = savedPos32;
        }
      } else {
        var result183 = null;
        this._pos = savedPos32;
      }
      var result182 = result183 !== null
        ? (function($1, $2) {  return $2;  }).apply(null, result183)
        : null;
      
      
      
      this._cache[cacheKey] = {
        nextPos: this._pos,
        result:  result182
      };
      return result182;
    },
    
    _parse_class: function(context) {
      var cacheKey = "class" + '@' + this._pos;
      var cachedResult = this._cache[cacheKey];
      if (cachedResult) {
        this._pos = cachedResult.nextPos;
        return cachedResult.result;
      }
      
      var pos = this._pos;
      
      var savedReportMatchFailures = context.reportMatchFailures;
      context.reportMatchFailures = false;
      var savedPos34 = this._pos;
      if (this._input.substr(this._pos, 1) === "[") {
        var result192 = "[";
        this._pos += 1;
      } else {
        var result192 = null;
        if (context.reportMatchFailures) {
          this._matchFailed(this._quoteString("["));
        }
      }
      if (result192 !== null) {
        if (this._input.substr(this._pos, 1) === "^") {
          var result200 = "^";
          this._pos += 1;
        } else {
          var result200 = null;
          if (context.reportMatchFailures) {
            this._matchFailed(this._quoteString("^"));
          }
        }
        var result193 = result200 !== null ? result200 : '';
        if (result193 !== null) {
          var result194 = [];
          var result199 = this._parse_classCharacterRange(context);
          if (result199 !== null) {
            var result197 = result199;
          } else {
            var result198 = this._parse_classCharacter(context);
            if (result198 !== null) {
              var result197 = result198;
            } else {
              var result197 = null;;
            };
          }
          while (result197 !== null) {
            result194.push(result197);
            var result199 = this._parse_classCharacterRange(context);
            if (result199 !== null) {
              var result197 = result199;
            } else {
              var result198 = this._parse_classCharacter(context);
              if (result198 !== null) {
                var result197 = result198;
              } else {
                var result197 = null;;
              };
            }
          }
          if (result194 !== null) {
            if (this._input.substr(this._pos, 1) === "]") {
              var result195 = "]";
              this._pos += 1;
            } else {
              var result195 = null;
              if (context.reportMatchFailures) {
                this._matchFailed(this._quoteString("]"));
              }
            }
            if (result195 !== null) {
              var result196 = this._parse___(context);
              if (result196 !== null) {
                var result191 = [result192, result193, result194, result195, result196];
              } else {
                var result191 = null;
                this._pos = savedPos34;
              }
            } else {
              var result191 = null;
              this._pos = savedPos34;
            }
          } else {
            var result191 = null;
            this._pos = savedPos34;
          }
        } else {
          var result191 = null;
          this._pos = savedPos34;
        }
      } else {
        var result191 = null;
        this._pos = savedPos34;
      }
      var result190 = result191 !== null
        ? (function($1, $2, $3, $4, $5) { 
          parts = PEG.ArrayUtils.map($3, function(part) { return part.data; });
          rawText = "["
            + $2
            + PEG.ArrayUtils.map($3, function(part) { return part.rawText; }).join("")
            + "]";
        
          return {
            type:     "class",
            inverted: $2 === "^",
            parts:    parts,
            // FIXME: Get the raw text from the input directly.
            rawText:  rawText
          };
         }).apply(null, result191)
        : null;
      context.reportMatchFailures = savedReportMatchFailures;
      if (context.reportMatchFailures && result190 === null) {
        this._matchFailed("character class");
      }
      
      this._cache[cacheKey] = {
        nextPos: this._pos,
        result:  result190
      };
      return result190;
    },
    
    _parse_classCharacterRange: function(context) {
      var cacheKey = "classCharacterRange" + '@' + this._pos;
      var cachedResult = this._cache[cacheKey];
      if (cachedResult) {
        this._pos = cachedResult.nextPos;
        return cachedResult.result;
      }
      
      var pos = this._pos;
      
      
      var savedPos35 = this._pos;
      var result203 = this._parse_classCharacter(context);
      if (result203 !== null) {
        if (this._input.substr(this._pos, 1) === "-") {
          var result204 = "-";
          this._pos += 1;
        } else {
          var result204 = null;
          if (context.reportMatchFailures) {
            this._matchFailed(this._quoteString("-"));
          }
        }
        if (result204 !== null) {
          var result205 = this._parse_classCharacter(context);
          if (result205 !== null) {
            var result202 = [result203, result204, result205];
          } else {
            var result202 = null;
            this._pos = savedPos35;
          }
        } else {
          var result202 = null;
          this._pos = savedPos35;
        }
      } else {
        var result202 = null;
        this._pos = savedPos35;
      }
      var result201 = result202 !== null
        ? (function($1, $2, $3) { 
          if ($1.data.charCodeAt(0) > $3.data.charCodeAt(0)) {
            throw new this.SyntaxError(
              "Invalid character range: " + $1.rawText + "-" + $2.rawText + "."
            );
          }
        
          return {
            data:    [$1.data, $3.data],
            // FIXME: Get the raw text from the input directly.
            rawText: $1.rawText + "-" + $3.rawText
          }
         }).apply(null, result202)
        : null;
      
      
      
      this._cache[cacheKey] = {
        nextPos: this._pos,
        result:  result201
      };
      return result201;
    },
    
    _parse_classCharacter: function(context) {
      var cacheKey = "classCharacter" + '@' + this._pos;
      var cachedResult = this._cache[cacheKey];
      if (cachedResult) {
        this._pos = cachedResult.nextPos;
        return cachedResult.result;
      }
      
      var pos = this._pos;
      
      
      var result207 = this._parse_bracketDelimitedCharacter(context);
      var result206 = result207 !== null
        ? (function($1) { 
          return {
            data:    $1,
            // FIXME: Get the raw text from the input directly.
            rawText: PEG.RegExpUtils.quoteForClass($1)
          };
         })(result207)
        : null;
      
      
      
      this._cache[cacheKey] = {
        nextPos: this._pos,
        result:  result206
      };
      return result206;
    },
    
    _parse_bracketDelimitedCharacter: function(context) {
      var cacheKey = "bracketDelimitedCharacter" + '@' + this._pos;
      var cachedResult = this._cache[cacheKey];
      if (cachedResult) {
        this._pos = cachedResult.nextPos;
        return cachedResult.result;
      }
      
      var pos = this._pos;
      
      
      var result214 = this._parse_simpleBracketDelimitedCharacter(context);
      if (result214 !== null) {
        var result208 = result214;
      } else {
        var result213 = this._parse_simpleEscapeSequence(context);
        if (result213 !== null) {
          var result208 = result213;
        } else {
          var result212 = this._parse_zeroEscapeSequence(context);
          if (result212 !== null) {
            var result208 = result212;
          } else {
            var result211 = this._parse_hexEscapeSequence(context);
            if (result211 !== null) {
              var result208 = result211;
            } else {
              var result210 = this._parse_unicodeEscapeSequence(context);
              if (result210 !== null) {
                var result208 = result210;
              } else {
                var result209 = this._parse_eolEscapeSequence(context);
                if (result209 !== null) {
                  var result208 = result209;
                } else {
                  var result208 = null;;
                };
              };
            };
          };
        };
      }
      
      
      
      this._cache[cacheKey] = {
        nextPos: this._pos,
        result:  result208
      };
      return result208;
    },
    
    _parse_simpleBracketDelimitedCharacter: function(context) {
      var cacheKey = "simpleBracketDelimitedCharacter" + '@' + this._pos;
      var cachedResult = this._cache[cacheKey];
      if (cachedResult) {
        this._pos = cachedResult.nextPos;
        return cachedResult.result;
      }
      
      var pos = this._pos;
      
      
      var savedPos36 = this._pos;
      var savedPos37 = this._pos;
      var savedReportMatchFailuresVar3 = context.reportMatchFailures;
      context.reportMatchFailures = false;
      if (this._input.substr(this._pos, 1) === "]") {
        var result222 = "]";
        this._pos += 1;
      } else {
        var result222 = null;
        if (context.reportMatchFailures) {
          this._matchFailed(this._quoteString("]"));
        }
      }
      if (result222 !== null) {
        var result219 = result222;
      } else {
        if (this._input.substr(this._pos, 1) === "\\") {
          var result221 = "\\";
          this._pos += 1;
        } else {
          var result221 = null;
          if (context.reportMatchFailures) {
            this._matchFailed(this._quoteString("\\"));
          }
        }
        if (result221 !== null) {
          var result219 = result221;
        } else {
          var result220 = this._parse_eolChar(context);
          if (result220 !== null) {
            var result219 = result220;
          } else {
            var result219 = null;;
          };
        };
      }
      context.reportMatchFailures = savedReportMatchFailuresVar3;
      if (result219 === null) {
        var result217 = '';
      } else {
        var result217 = null;
        this._pos = savedPos37;
      }
      if (result217 !== null) {
        if (this._input.length > this._pos) {
          var result218 = this._input.charAt(this._pos);
          this._pos++;
        } else {
          var result218 = null;
          if (context.reportMatchFailures) {
            this._matchFailed('any character');
          }
        }
        if (result218 !== null) {
          var result216 = [result217, result218];
        } else {
          var result216 = null;
          this._pos = savedPos36;
        }
      } else {
        var result216 = null;
        this._pos = savedPos36;
      }
      var result215 = result216 !== null
        ? (function($1, $2) {  return $2;  }).apply(null, result216)
        : null;
      
      
      
      this._cache[cacheKey] = {
        nextPos: this._pos,
        result:  result215
      };
      return result215;
    },
    
    _parse_simpleEscapeSequence: function(context) {
      var cacheKey = "simpleEscapeSequence" + '@' + this._pos;
      var cachedResult = this._cache[cacheKey];
      if (cachedResult) {
        this._pos = cachedResult.nextPos;
        return cachedResult.result;
      }
      
      var pos = this._pos;
      
      
      var savedPos38 = this._pos;
      if (this._input.substr(this._pos, 1) === "\\") {
        var result225 = "\\";
        this._pos += 1;
      } else {
        var result225 = null;
        if (context.reportMatchFailures) {
          this._matchFailed(this._quoteString("\\"));
        }
      }
      if (result225 !== null) {
        var savedPos39 = this._pos;
        var savedReportMatchFailuresVar4 = context.reportMatchFailures;
        context.reportMatchFailures = false;
        var result232 = this._parse_digit(context);
        if (result232 !== null) {
          var result228 = result232;
        } else {
          if (this._input.substr(this._pos, 1) === "x") {
            var result231 = "x";
            this._pos += 1;
          } else {
            var result231 = null;
            if (context.reportMatchFailures) {
              this._matchFailed(this._quoteString("x"));
            }
          }
          if (result231 !== null) {
            var result228 = result231;
          } else {
            if (this._input.substr(this._pos, 1) === "u") {
              var result230 = "u";
              this._pos += 1;
            } else {
              var result230 = null;
              if (context.reportMatchFailures) {
                this._matchFailed(this._quoteString("u"));
              }
            }
            if (result230 !== null) {
              var result228 = result230;
            } else {
              var result229 = this._parse_eolChar(context);
              if (result229 !== null) {
                var result228 = result229;
              } else {
                var result228 = null;;
              };
            };
          };
        }
        context.reportMatchFailures = savedReportMatchFailuresVar4;
        if (result228 === null) {
          var result226 = '';
        } else {
          var result226 = null;
          this._pos = savedPos39;
        }
        if (result226 !== null) {
          if (this._input.length > this._pos) {
            var result227 = this._input.charAt(this._pos);
            this._pos++;
          } else {
            var result227 = null;
            if (context.reportMatchFailures) {
              this._matchFailed('any character');
            }
          }
          if (result227 !== null) {
            var result224 = [result225, result226, result227];
          } else {
            var result224 = null;
            this._pos = savedPos38;
          }
        } else {
          var result224 = null;
          this._pos = savedPos38;
        }
      } else {
        var result224 = null;
        this._pos = savedPos38;
      }
      var result223 = result224 !== null
        ? (function($1, $2, $3) { 
          return $3
            .replace("b", "\b")
            .replace("f", "\f")
            .replace("n", "\n")
            .replace("r", "\r")
            .replace("t", "\t")
            .replace("v", "\x0B") // IE does not recognize "\v".
         }).apply(null, result224)
        : null;
      
      
      
      this._cache[cacheKey] = {
        nextPos: this._pos,
        result:  result223
      };
      return result223;
    },
    
    _parse_zeroEscapeSequence: function(context) {
      var cacheKey = "zeroEscapeSequence" + '@' + this._pos;
      var cachedResult = this._cache[cacheKey];
      if (cachedResult) {
        this._pos = cachedResult.nextPos;
        return cachedResult.result;
      }
      
      var pos = this._pos;
      
      
      var savedPos40 = this._pos;
      if (this._input.substr(this._pos, 2) === "\\0") {
        var result235 = "\\0";
        this._pos += 2;
      } else {
        var result235 = null;
        if (context.reportMatchFailures) {
          this._matchFailed(this._quoteString("\\0"));
        }
      }
      if (result235 !== null) {
        var savedPos41 = this._pos;
        var savedReportMatchFailuresVar5 = context.reportMatchFailures;
        context.reportMatchFailures = false;
        var result237 = this._parse_digit(context);
        context.reportMatchFailures = savedReportMatchFailuresVar5;
        if (result237 === null) {
          var result236 = '';
        } else {
          var result236 = null;
          this._pos = savedPos41;
        }
        if (result236 !== null) {
          var result234 = [result235, result236];
        } else {
          var result234 = null;
          this._pos = savedPos40;
        }
      } else {
        var result234 = null;
        this._pos = savedPos40;
      }
      var result233 = result234 !== null
        ? (function($1, $2) {  return "\0";  }).apply(null, result234)
        : null;
      
      
      
      this._cache[cacheKey] = {
        nextPos: this._pos,
        result:  result233
      };
      return result233;
    },
    
    _parse_hexEscapeSequence: function(context) {
      var cacheKey = "hexEscapeSequence" + '@' + this._pos;
      var cachedResult = this._cache[cacheKey];
      if (cachedResult) {
        this._pos = cachedResult.nextPos;
        return cachedResult.result;
      }
      
      var pos = this._pos;
      
      
      var savedPos42 = this._pos;
      if (this._input.substr(this._pos, 2) === "\\x") {
        var result240 = "\\x";
        this._pos += 2;
      } else {
        var result240 = null;
        if (context.reportMatchFailures) {
          this._matchFailed(this._quoteString("\\x"));
        }
      }
      if (result240 !== null) {
        var result241 = this._parse_hexDigit(context);
        if (result241 !== null) {
          var result242 = this._parse_hexDigit(context);
          if (result242 !== null) {
            var result239 = [result240, result241, result242];
          } else {
            var result239 = null;
            this._pos = savedPos42;
          }
        } else {
          var result239 = null;
          this._pos = savedPos42;
        }
      } else {
        var result239 = null;
        this._pos = savedPos42;
      }
      var result238 = result239 !== null
        ? (function($1, $2, $3) { 
          return String.fromCharCode(parseInt("0x" + $2 + $3));
         }).apply(null, result239)
        : null;
      
      
      
      this._cache[cacheKey] = {
        nextPos: this._pos,
        result:  result238
      };
      return result238;
    },
    
    _parse_unicodeEscapeSequence: function(context) {
      var cacheKey = "unicodeEscapeSequence" + '@' + this._pos;
      var cachedResult = this._cache[cacheKey];
      if (cachedResult) {
        this._pos = cachedResult.nextPos;
        return cachedResult.result;
      }
      
      var pos = this._pos;
      
      
      var savedPos43 = this._pos;
      if (this._input.substr(this._pos, 2) === "\\u") {
        var result245 = "\\u";
        this._pos += 2;
      } else {
        var result245 = null;
        if (context.reportMatchFailures) {
          this._matchFailed(this._quoteString("\\u"));
        }
      }
      if (result245 !== null) {
        var result246 = this._parse_hexDigit(context);
        if (result246 !== null) {
          var result247 = this._parse_hexDigit(context);
          if (result247 !== null) {
            var result248 = this._parse_hexDigit(context);
            if (result248 !== null) {
              var result249 = this._parse_hexDigit(context);
              if (result249 !== null) {
                var result244 = [result245, result246, result247, result248, result249];
              } else {
                var result244 = null;
                this._pos = savedPos43;
              }
            } else {
              var result244 = null;
              this._pos = savedPos43;
            }
          } else {
            var result244 = null;
            this._pos = savedPos43;
          }
        } else {
          var result244 = null;
          this._pos = savedPos43;
        }
      } else {
        var result244 = null;
        this._pos = savedPos43;
      }
      var result243 = result244 !== null
        ? (function($1, $2, $3, $4, $5) { 
          return String.fromCharCode(parseInt("0x" + $2 + $3 + $4 + $5));
         }).apply(null, result244)
        : null;
      
      
      
      this._cache[cacheKey] = {
        nextPos: this._pos,
        result:  result243
      };
      return result243;
    },
    
    _parse_eolEscapeSequence: function(context) {
      var cacheKey = "eolEscapeSequence" + '@' + this._pos;
      var cachedResult = this._cache[cacheKey];
      if (cachedResult) {
        this._pos = cachedResult.nextPos;
        return cachedResult.result;
      }
      
      var pos = this._pos;
      
      
      var savedPos44 = this._pos;
      if (this._input.substr(this._pos, 1) === "\\") {
        var result252 = "\\";
        this._pos += 1;
      } else {
        var result252 = null;
        if (context.reportMatchFailures) {
          this._matchFailed(this._quoteString("\\"));
        }
      }
      if (result252 !== null) {
        var result253 = this._parse_eol(context);
        if (result253 !== null) {
          var result251 = [result252, result253];
        } else {
          var result251 = null;
          this._pos = savedPos44;
        }
      } else {
        var result251 = null;
        this._pos = savedPos44;
      }
      var result250 = result251 !== null
        ? (function($1, $2) {  return $2;  }).apply(null, result251)
        : null;
      
      
      
      this._cache[cacheKey] = {
        nextPos: this._pos,
        result:  result250
      };
      return result250;
    },
    
    _parse_digit: function(context) {
      var cacheKey = "digit" + '@' + this._pos;
      var cachedResult = this._cache[cacheKey];
      if (cachedResult) {
        this._pos = cachedResult.nextPos;
        return cachedResult.result;
      }
      
      var pos = this._pos;
      
      
      if (this._input.substr(this._pos).match(/^[0-9]/) !== null) {
        var result254 = this._input.charAt(this._pos);
        this._pos++;
      } else {
        var result254 = null;
        if (context.reportMatchFailures) {
          this._matchFailed("[0-9]");
        }
      }
      
      
      
      this._cache[cacheKey] = {
        nextPos: this._pos,
        result:  result254
      };
      return result254;
    },
    
    _parse_hexDigit: function(context) {
      var cacheKey = "hexDigit" + '@' + this._pos;
      var cachedResult = this._cache[cacheKey];
      if (cachedResult) {
        this._pos = cachedResult.nextPos;
        return cachedResult.result;
      }
      
      var pos = this._pos;
      
      
      if (this._input.substr(this._pos).match(/^[0-9a-fA-F]/) !== null) {
        var result255 = this._input.charAt(this._pos);
        this._pos++;
      } else {
        var result255 = null;
        if (context.reportMatchFailures) {
          this._matchFailed("[0-9a-fA-F]");
        }
      }
      
      
      
      this._cache[cacheKey] = {
        nextPos: this._pos,
        result:  result255
      };
      return result255;
    },
    
    _parse_letter: function(context) {
      var cacheKey = "letter" + '@' + this._pos;
      var cachedResult = this._cache[cacheKey];
      if (cachedResult) {
        this._pos = cachedResult.nextPos;
        return cachedResult.result;
      }
      
      var pos = this._pos;
      
      
      var result258 = this._parse_lowerCaseLetter(context);
      if (result258 !== null) {
        var result256 = result258;
      } else {
        var result257 = this._parse_upperCaseLetter(context);
        if (result257 !== null) {
          var result256 = result257;
        } else {
          var result256 = null;;
        };
      }
      
      
      
      this._cache[cacheKey] = {
        nextPos: this._pos,
        result:  result256
      };
      return result256;
    },
    
    _parse_lowerCaseLetter: function(context) {
      var cacheKey = "lowerCaseLetter" + '@' + this._pos;
      var cachedResult = this._cache[cacheKey];
      if (cachedResult) {
        this._pos = cachedResult.nextPos;
        return cachedResult.result;
      }
      
      var pos = this._pos;
      
      
      if (this._input.substr(this._pos).match(/^[a-z]/) !== null) {
        var result259 = this._input.charAt(this._pos);
        this._pos++;
      } else {
        var result259 = null;
        if (context.reportMatchFailures) {
          this._matchFailed("[a-z]");
        }
      }
      
      
      
      this._cache[cacheKey] = {
        nextPos: this._pos,
        result:  result259
      };
      return result259;
    },
    
    _parse_upperCaseLetter: function(context) {
      var cacheKey = "upperCaseLetter" + '@' + this._pos;
      var cachedResult = this._cache[cacheKey];
      if (cachedResult) {
        this._pos = cachedResult.nextPos;
        return cachedResult.result;
      }
      
      var pos = this._pos;
      
      
      if (this._input.substr(this._pos).match(/^[A-Z]/) !== null) {
        var result260 = this._input.charAt(this._pos);
        this._pos++;
      } else {
        var result260 = null;
        if (context.reportMatchFailures) {
          this._matchFailed("[A-Z]");
        }
      }
      
      
      
      this._cache[cacheKey] = {
        nextPos: this._pos,
        result:  result260
      };
      return result260;
    },
    
    _parse___: function(context) {
      var cacheKey = "__" + '@' + this._pos;
      var cachedResult = this._cache[cacheKey];
      if (cachedResult) {
        this._pos = cachedResult.nextPos;
        return cachedResult.result;
      }
      
      var pos = this._pos;
      
      
      var result261 = [];
      var result265 = this._parse_whitespace(context);
      if (result265 !== null) {
        var result262 = result265;
      } else {
        var result264 = this._parse_eol(context);
        if (result264 !== null) {
          var result262 = result264;
        } else {
          var result263 = this._parse_comment(context);
          if (result263 !== null) {
            var result262 = result263;
          } else {
            var result262 = null;;
          };
        };
      }
      while (result262 !== null) {
        result261.push(result262);
        var result265 = this._parse_whitespace(context);
        if (result265 !== null) {
          var result262 = result265;
        } else {
          var result264 = this._parse_eol(context);
          if (result264 !== null) {
            var result262 = result264;
          } else {
            var result263 = this._parse_comment(context);
            if (result263 !== null) {
              var result262 = result263;
            } else {
              var result262 = null;;
            };
          };
        }
      }
      
      
      
      this._cache[cacheKey] = {
        nextPos: this._pos,
        result:  result261
      };
      return result261;
    },
    
    _parse_comment: function(context) {
      var cacheKey = "comment" + '@' + this._pos;
      var cachedResult = this._cache[cacheKey];
      if (cachedResult) {
        this._pos = cachedResult.nextPos;
        return cachedResult.result;
      }
      
      var pos = this._pos;
      
      var savedReportMatchFailures = context.reportMatchFailures;
      context.reportMatchFailures = false;
      var result268 = this._parse_singleLineComment(context);
      if (result268 !== null) {
        var result266 = result268;
      } else {
        var result267 = this._parse_multiLineComment(context);
        if (result267 !== null) {
          var result266 = result267;
        } else {
          var result266 = null;;
        };
      }
      context.reportMatchFailures = savedReportMatchFailures;
      if (context.reportMatchFailures && result266 === null) {
        this._matchFailed("comment");
      }
      
      this._cache[cacheKey] = {
        nextPos: this._pos,
        result:  result266
      };
      return result266;
    },
    
    _parse_singleLineComment: function(context) {
      var cacheKey = "singleLineComment" + '@' + this._pos;
      var cachedResult = this._cache[cacheKey];
      if (cachedResult) {
        this._pos = cachedResult.nextPos;
        return cachedResult.result;
      }
      
      var pos = this._pos;
      
      
      var savedPos45 = this._pos;
      if (this._input.substr(this._pos, 2) === "//") {
        var result270 = "//";
        this._pos += 2;
      } else {
        var result270 = null;
        if (context.reportMatchFailures) {
          this._matchFailed(this._quoteString("//"));
        }
      }
      if (result270 !== null) {
        var result271 = [];
        var savedPos46 = this._pos;
        var savedPos47 = this._pos;
        var savedReportMatchFailuresVar6 = context.reportMatchFailures;
        context.reportMatchFailures = false;
        var result275 = this._parse_eolChar(context);
        context.reportMatchFailures = savedReportMatchFailuresVar6;
        if (result275 === null) {
          var result273 = '';
        } else {
          var result273 = null;
          this._pos = savedPos47;
        }
        if (result273 !== null) {
          if (this._input.length > this._pos) {
            var result274 = this._input.charAt(this._pos);
            this._pos++;
          } else {
            var result274 = null;
            if (context.reportMatchFailures) {
              this._matchFailed('any character');
            }
          }
          if (result274 !== null) {
            var result272 = [result273, result274];
          } else {
            var result272 = null;
            this._pos = savedPos46;
          }
        } else {
          var result272 = null;
          this._pos = savedPos46;
        }
        while (result272 !== null) {
          result271.push(result272);
          var savedPos46 = this._pos;
          var savedPos47 = this._pos;
          var savedReportMatchFailuresVar6 = context.reportMatchFailures;
          context.reportMatchFailures = false;
          var result275 = this._parse_eolChar(context);
          context.reportMatchFailures = savedReportMatchFailuresVar6;
          if (result275 === null) {
            var result273 = '';
          } else {
            var result273 = null;
            this._pos = savedPos47;
          }
          if (result273 !== null) {
            if (this._input.length > this._pos) {
              var result274 = this._input.charAt(this._pos);
              this._pos++;
            } else {
              var result274 = null;
              if (context.reportMatchFailures) {
                this._matchFailed('any character');
              }
            }
            if (result274 !== null) {
              var result272 = [result273, result274];
            } else {
              var result272 = null;
              this._pos = savedPos46;
            }
          } else {
            var result272 = null;
            this._pos = savedPos46;
          }
        }
        if (result271 !== null) {
          var result269 = [result270, result271];
        } else {
          var result269 = null;
          this._pos = savedPos45;
        }
      } else {
        var result269 = null;
        this._pos = savedPos45;
      }
      
      
      
      this._cache[cacheKey] = {
        nextPos: this._pos,
        result:  result269
      };
      return result269;
    },
    
    _parse_multiLineComment: function(context) {
      var cacheKey = "multiLineComment" + '@' + this._pos;
      var cachedResult = this._cache[cacheKey];
      if (cachedResult) {
        this._pos = cachedResult.nextPos;
        return cachedResult.result;
      }
      
      var pos = this._pos;
      
      
      var savedPos48 = this._pos;
      if (this._input.substr(this._pos, 2) === "/*") {
        var result277 = "/*";
        this._pos += 2;
      } else {
        var result277 = null;
        if (context.reportMatchFailures) {
          this._matchFailed(this._quoteString("/*"));
        }
      }
      if (result277 !== null) {
        var result278 = [];
        var savedPos49 = this._pos;
        var savedPos50 = this._pos;
        var savedReportMatchFailuresVar7 = context.reportMatchFailures;
        context.reportMatchFailures = false;
        if (this._input.substr(this._pos, 2) === "*/") {
          var result283 = "*/";
          this._pos += 2;
        } else {
          var result283 = null;
          if (context.reportMatchFailures) {
            this._matchFailed(this._quoteString("*/"));
          }
        }
        context.reportMatchFailures = savedReportMatchFailuresVar7;
        if (result283 === null) {
          var result281 = '';
        } else {
          var result281 = null;
          this._pos = savedPos50;
        }
        if (result281 !== null) {
          if (this._input.length > this._pos) {
            var result282 = this._input.charAt(this._pos);
            this._pos++;
          } else {
            var result282 = null;
            if (context.reportMatchFailures) {
              this._matchFailed('any character');
            }
          }
          if (result282 !== null) {
            var result280 = [result281, result282];
          } else {
            var result280 = null;
            this._pos = savedPos49;
          }
        } else {
          var result280 = null;
          this._pos = savedPos49;
        }
        while (result280 !== null) {
          result278.push(result280);
          var savedPos49 = this._pos;
          var savedPos50 = this._pos;
          var savedReportMatchFailuresVar7 = context.reportMatchFailures;
          context.reportMatchFailures = false;
          if (this._input.substr(this._pos, 2) === "*/") {
            var result283 = "*/";
            this._pos += 2;
          } else {
            var result283 = null;
            if (context.reportMatchFailures) {
              this._matchFailed(this._quoteString("*/"));
            }
          }
          context.reportMatchFailures = savedReportMatchFailuresVar7;
          if (result283 === null) {
            var result281 = '';
          } else {
            var result281 = null;
            this._pos = savedPos50;
          }
          if (result281 !== null) {
            if (this._input.length > this._pos) {
              var result282 = this._input.charAt(this._pos);
              this._pos++;
            } else {
              var result282 = null;
              if (context.reportMatchFailures) {
                this._matchFailed('any character');
              }
            }
            if (result282 !== null) {
              var result280 = [result281, result282];
            } else {
              var result280 = null;
              this._pos = savedPos49;
            }
          } else {
            var result280 = null;
            this._pos = savedPos49;
          }
        }
        if (result278 !== null) {
          if (this._input.substr(this._pos, 2) === "*/") {
            var result279 = "*/";
            this._pos += 2;
          } else {
            var result279 = null;
            if (context.reportMatchFailures) {
              this._matchFailed(this._quoteString("*/"));
            }
          }
          if (result279 !== null) {
            var result276 = [result277, result278, result279];
          } else {
            var result276 = null;
            this._pos = savedPos48;
          }
        } else {
          var result276 = null;
          this._pos = savedPos48;
        }
      } else {
        var result276 = null;
        this._pos = savedPos48;
      }
      
      
      
      this._cache[cacheKey] = {
        nextPos: this._pos,
        result:  result276
      };
      return result276;
    },
    
    _parse_eol: function(context) {
      var cacheKey = "eol" + '@' + this._pos;
      var cachedResult = this._cache[cacheKey];
      if (cachedResult) {
        this._pos = cachedResult.nextPos;
        return cachedResult.result;
      }
      
      var pos = this._pos;
      
      var savedReportMatchFailures = context.reportMatchFailures;
      context.reportMatchFailures = false;
      if (this._input.substr(this._pos, 1) === "\n") {
        var result289 = "\n";
        this._pos += 1;
      } else {
        var result289 = null;
        if (context.reportMatchFailures) {
          this._matchFailed(this._quoteString("\n"));
        }
      }
      if (result289 !== null) {
        var result284 = result289;
      } else {
        if (this._input.substr(this._pos, 2) === "\r\n") {
          var result288 = "\r\n";
          this._pos += 2;
        } else {
          var result288 = null;
          if (context.reportMatchFailures) {
            this._matchFailed(this._quoteString("\r\n"));
          }
        }
        if (result288 !== null) {
          var result284 = result288;
        } else {
          if (this._input.substr(this._pos, 1) === "\r") {
            var result287 = "\r";
            this._pos += 1;
          } else {
            var result287 = null;
            if (context.reportMatchFailures) {
              this._matchFailed(this._quoteString("\r"));
            }
          }
          if (result287 !== null) {
            var result284 = result287;
          } else {
            if (this._input.substr(this._pos, 1) === "\u2028") {
              var result286 = "\u2028";
              this._pos += 1;
            } else {
              var result286 = null;
              if (context.reportMatchFailures) {
                this._matchFailed(this._quoteString("\u2028"));
              }
            }
            if (result286 !== null) {
              var result284 = result286;
            } else {
              if (this._input.substr(this._pos, 1) === "\u2029") {
                var result285 = "\u2029";
                this._pos += 1;
              } else {
                var result285 = null;
                if (context.reportMatchFailures) {
                  this._matchFailed(this._quoteString("\u2029"));
                }
              }
              if (result285 !== null) {
                var result284 = result285;
              } else {
                var result284 = null;;
              };
            };
          };
        };
      }
      context.reportMatchFailures = savedReportMatchFailures;
      if (context.reportMatchFailures && result284 === null) {
        this._matchFailed("end of line");
      }
      
      this._cache[cacheKey] = {
        nextPos: this._pos,
        result:  result284
      };
      return result284;
    },
    
    _parse_eolChar: function(context) {
      var cacheKey = "eolChar" + '@' + this._pos;
      var cachedResult = this._cache[cacheKey];
      if (cachedResult) {
        this._pos = cachedResult.nextPos;
        return cachedResult.result;
      }
      
      var pos = this._pos;
      
      
      if (this._input.substr(this._pos).match(/^[\n\r\u2028\u2029]/) !== null) {
        var result290 = this._input.charAt(this._pos);
        this._pos++;
      } else {
        var result290 = null;
        if (context.reportMatchFailures) {
          this._matchFailed("[\\n\\r\\u2028\\u2029]");
        }
      }
      
      
      
      this._cache[cacheKey] = {
        nextPos: this._pos,
        result:  result290
      };
      return result290;
    },
    
    _parse_whitespace: function(context) {
      var cacheKey = "whitespace" + '@' + this._pos;
      var cachedResult = this._cache[cacheKey];
      if (cachedResult) {
        this._pos = cachedResult.nextPos;
        return cachedResult.result;
      }
      
      var pos = this._pos;
      
      var savedReportMatchFailures = context.reportMatchFailures;
      context.reportMatchFailures = false;
      if (this._input.substr(this._pos).match(/^[ 	  ᠎ -   　]/) !== null) {
        var result291 = this._input.charAt(this._pos);
        this._pos++;
      } else {
        var result291 = null;
        if (context.reportMatchFailures) {
          this._matchFailed("[ 	  ᠎ -   　]");
        }
      }
      context.reportMatchFailures = savedReportMatchFailures;
      if (context.reportMatchFailures && result291 === null) {
        this._matchFailed("whitespace");
      }
      
      this._cache[cacheKey] = {
        nextPos: this._pos,
        result:  result291
      };
      return result291;
    },
    
    /*
     * Parses the input with a generated parser. If the parsing is successfull,
     * returns a value explicitly or implicitly specified by the grammar from
     * which the parser was generated (see |PEG.buildParser|). If the parsing is
     * unsuccessful, throws |PEG.grammarParser.SyntaxError| describing the error.
     */
    parse: function(input) {
      var that = this;
      
      function initialize() {
        that._input = input;
        that._pos = 0;
        that._rightmostMatchFailuresPos = 0;
        that._rightmostMatchFailuresExpected = [];
        that._cache = {};
      }
      
      function buildErrorMessage() {
        function buildExpected(failuresExpected) {
          switch (failuresExpected.length) {
            case 0:
              return 'end of input';
            case 1:
              return failuresExpected[0];
            default:
              failuresExpected.sort();
              return failuresExpected.slice(0, failuresExpected.length - 1).join(', ')
                + ' or '
                + failuresExpected[failuresExpected.length - 1];
          }
        }
        
        var expected = buildExpected(that._rightmostMatchFailuresExpected);
        var pos = Math.max(that._pos, that._rightmostMatchFailuresPos);
        var actual = pos < that._input.length
          ? that._quoteString(that._input.charAt(pos))
          : 'end of input';
        
        return 'Expected ' + expected + ' but ' + actual + ' found.';
      }
      
      function computeErrorPosition() {
        /*
         * The first idea was to use |String.split| to break the input up to the
         * error position along newlines and derive the line and column from
         * there. However IE's |split| implementation is so broken that it was
         * enough to prevent it.
         */
        
        var input = that._input;
        var pos = that._rightmostMatchFailuresPos;
        var line = 1;
        var column = 1;
        var seenCR = false;
        
        for (var i = 0; i < pos; i++) {
          var ch = input.charAt(i);
          if (ch === '\n') {
            if (!seenCR) { line++; }
            column = 1;
            seenCR = false;
          } else if (ch === '\r' | ch === '\u2028' || ch === '\u2029') {
            line++;
            column = 1;
            seenCR = true;
          } else {
            column++;
            seenCR = false;
          }
        }
        
        return { line: line, column: column };
      }
      
      initialize();
      
      var initialContext = {
        reportMatchFailures: true
      };
      
      var result = this['_parse_' + this._startRule](initialContext);
      
      /*
       * The parser is now in one of the following three states:
       *
       * 1. The parser successfully parsed the whole input.
       *
       *    - |result !== null|
       *    - |that._pos === input.length|
       *    - |that._rightmostMatchFailuresExpected.length| may or may not contain
       *      something
       *
       * 2. The parser successfully parsed only a part of the input.
       *
       *    - |result !== null|
       *    - |that._pos < input.length|
       *    - |that._rightmostMatchFailuresExpected.length| may or may not contain
       *      something
       *
       * 3. The parser did not successfully parse any part of the input.
       *
       *   - |result === null|
       *   - |that._pos === 0|
       *   - |that._rightmostMatchFailuresExpected.length| contains at least one failure
       *
       * All code following this comment (including called functions) must
       * handle these states.
       */
      if (result === null || this._pos !== input.length) {
        var errorPosition = computeErrorPosition();
        throw new this.SyntaxError(
          buildErrorMessage(),
          errorPosition.line,
          errorPosition.column
        );
      }
      
      return result;
    },
    
    /* Returns the parser source code. */
    toSource: function() { return this._source; }
  };
  
  /* Thrown when a parser encounters a syntax error. */
  
  result.SyntaxError = function(message, line, column) {
    this.name = 'SyntaxError';
    this.message = message;
    this.line = line;
    this.column = column;
  };
  
  result.SyntaxError.prototype = Error.prototype;
  
  return result;
})();