discourse/lib/javascripts/messageformat.js

/**
 * messageformat.js
 *
 * ICU PluralFormat + SelectFormat for JavaScript
 *
 * @author Alex Sexton - @SlexAxton
 * @version 0.1.5
 * @license WTFPL
 * @contributor_license Dojo CLA
*/
(function ( root ) {

  // Create the constructor function
  function MessageFormat ( locale, pluralFunc ) {
    var fallbackLocale;

    if ( locale && pluralFunc ) {
      MessageFormat.locale[ locale ] = pluralFunc;
    }

    // Defaults
    fallbackLocale = locale = locale || "en";
    pluralFunc = pluralFunc || MessageFormat.locale[ fallbackLocale = MessageFormat.Utils.getFallbackLocale( locale ) ];

    if ( ! pluralFunc ) {
      throw new Error( "Plural Function not found for locale: " + locale );
    }

    // Own Properties
    this.pluralFunc = pluralFunc;
    this.locale = locale;
    this.fallbackLocale = fallbackLocale;
  }

  // Set up the locales object. Add in english by default
  MessageFormat.locale = {
    "en" : function ( n ) {
      if ( n === 1 ) {
        return "one";
      }
      return "other";
    }
  };

  // Build out our basic SafeString type
  // more or less stolen from Handlebars by @wycats
  MessageFormat.SafeString = function( string ) {
    this.string = string;
  };

  MessageFormat.SafeString.prototype.toString = function () {
    return this.string.toString();
  };

  MessageFormat.Utils = {
    numSub : function ( string, key, depth ) {
      // make sure that it's not an escaped octothorpe
      return string.replace( /^#|[^\\]#/g, function (m) {
        var prefix = m && m.length === 2 ? m.charAt(0) : '';
        return prefix + '" + (function(){ var x = ' +
        key+';\nif( isNaN(x) ){\nthrow new Error("MessageFormat: `"+lastkey_'+depth+'+"` isnt a number.");\n}\nreturn x;\n})() + "';
      });
    },
    escapeExpression : function (string) {
      var escape = {
            "\n": "\\n",
            "\"": '\\"'
          },
          badChars = /[\n"]/g,
          possible = /[\n"]/,
          escapeChar = function(chr) {
            return escape[chr] || "&";
          };

      // Don't escape SafeStrings, since they're already safe
      if ( string instanceof MessageFormat.SafeString ) {
        return string.toString();
      }
      else if ( string === null || string === false ) {
        return "";
      }

      if ( ! possible.test( string ) ) {
        return string;
      }
      return string.replace( badChars, escapeChar );
    },
    getFallbackLocale: function( locale ) {
      var tagSeparator = locale.indexOf("-") >= 0 ? "-" : "_";

      // Lets just be friends, fallback through the language tags
      while ( ! MessageFormat.locale.hasOwnProperty( locale ) ) {
        locale = locale.substring(0, locale.lastIndexOf( tagSeparator ));
        if (locale.length === 0) {
          return null;
        }
      }

      return locale;
    }
  };

  // This is generated and pulled in for browsers.
  var mparser = (function(){
    /*
     * Generated by PEG.js 0.7.0.
     *
     * http://pegjs.majda.cz/
     */
    
    function quote(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.
       *
       * For portability, we also escape escape all control and non-ASCII
       * characters. Note that "\0" and "\v" escape sequences are not used
       * because JSHint does not like the first and IE the second.
       */
       return '"' + s
        .replace(/\\/g, '\\\\')  // backslash
        .replace(/"/g, '\\"')    // closing quote character
        .replace(/\x08/g, '\\b') // backspace
        .replace(/\t/g, '\\t')   // horizontal tab
        .replace(/\n/g, '\\n')   // line feed
        .replace(/\f/g, '\\f')   // form feed
        .replace(/\r/g, '\\r')   // carriage return
        .replace(/[\x00-\x07\x0B\x0E-\x1F\x80-\uFFFF]/g, escape)
        + '"';
    }
    
    var result = {
      /*
       * Parses the input with a generated parser. If the parsing is successful,
       * 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.parser.SyntaxError| describing the error.
       */
      parse: function(input, startRule) {
        var parseFunctions = {
          "start": parse_start,
          "messageFormatPattern": parse_messageFormatPattern,
          "messageFormatPatternRight": parse_messageFormatPatternRight,
          "messageFormatElement": parse_messageFormatElement,
          "elementFormat": parse_elementFormat,
          "pluralStyle": parse_pluralStyle,
          "selectStyle": parse_selectStyle,
          "pluralFormatPattern": parse_pluralFormatPattern,
          "offsetPattern": parse_offsetPattern,
          "selectFormatPattern": parse_selectFormatPattern,
          "pluralForms": parse_pluralForms,
          "stringKey": parse_stringKey,
          "string": parse_string,
          "id": parse_id,
          "chars": parse_chars,
          "char": parse_char,
          "digits": parse_digits,
          "hexDigit": parse_hexDigit,
          "_": parse__,
          "whitespace": parse_whitespace
        };
        
        if (startRule !== undefined) {
          if (parseFunctions[startRule] === undefined) {
            throw new Error("Invalid rule name: " + quote(startRule) + ".");
          }
        } else {
          startRule = "start";
        }
        
        var pos = 0;
        var reportFailures = 0;
        var rightmostFailuresPos = 0;
        var rightmostFailuresExpected = [];
        
        function padLeft(input, padding, length) {
          var result = input;
          
          var padLength = length - input.length;
          for (var i = 0; i < padLength; i++) {
            result = padding + result;
          }
          
          return result;
        }
        
        function escape(ch) {
          var charCode = ch.charCodeAt(0);
          var escapeChar;
          var length;
          
          if (charCode <= 0xFF) {
            escapeChar = 'x';
            length = 2;
          } else {
            escapeChar = 'u';
            length = 4;
          }
          
          return '\\' + escapeChar + padLeft(charCode.toString(16).toUpperCase(), '0', length);
        }
        
        function matchFailed(failure) {
          if (pos < rightmostFailuresPos) {
            return;
          }
          
          if (pos > rightmostFailuresPos) {
            rightmostFailuresPos = pos;
            rightmostFailuresExpected = [];
          }
          
          rightmostFailuresExpected.push(failure);
        }
        
        function parse_start() {
          var result0;
          var pos0;
          
          pos0 = pos;
          result0 = parse_messageFormatPattern();
          if (result0 !== null) {
            result0 = (function(offset, messageFormatPattern) { return { type: "program", program: messageFormatPattern }; })(pos0, result0);
          }
          if (result0 === null) {
            pos = pos0;
          }
          return result0;
        }
        
        function parse_messageFormatPattern() {
          var result0, result1, result2;
          var pos0, pos1;
          
          pos0 = pos;
          pos1 = pos;
          result0 = parse_string();
          if (result0 !== null) {
            result1 = [];
            result2 = parse_messageFormatPatternRight();
            while (result2 !== null) {
              result1.push(result2);
              result2 = parse_messageFormatPatternRight();
            }
            if (result1 !== null) {
              result0 = [result0, result1];
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
          if (result0 !== null) {
            result0 = (function(offset, s1, inner) {
              var st = [];
              if ( s1 && s1.val ) {
                st.push( s1 );
              }
              for( var i in inner ){
                if ( inner.hasOwnProperty( i ) ) {
                  st.push( inner[ i ] );
                }
              }
              return { type: 'messageFormatPattern', statements: st };
            })(pos0, result0[0], result0[1]);
          }
          if (result0 === null) {
            pos = pos0;
          }
          return result0;
        }
        
        function parse_messageFormatPatternRight() {
          var result0, result1, result2, result3, result4, result5;
          var pos0, pos1;
          
          pos0 = pos;
          pos1 = pos;
          if (input.charCodeAt(pos) === 123) {
            result0 = "{";
            pos++;
          } else {
            result0 = null;
            if (reportFailures === 0) {
              matchFailed("\"{\"");
            }
          }
          if (result0 !== null) {
            result1 = parse__();
            if (result1 !== null) {
              result2 = parse_messageFormatElement();
              if (result2 !== null) {
                result3 = parse__();
                if (result3 !== null) {
                  if (input.charCodeAt(pos) === 125) {
                    result4 = "}";
                    pos++;
                  } else {
                    result4 = null;
                    if (reportFailures === 0) {
                      matchFailed("\"}\"");
                    }
                  }
                  if (result4 !== null) {
                    result5 = parse_string();
                    if (result5 !== null) {
                      result0 = [result0, result1, result2, result3, result4, result5];
                    } else {
                      result0 = null;
                      pos = pos1;
                    }
                  } else {
                    result0 = null;
                    pos = pos1;
                  }
                } else {
                  result0 = null;
                  pos = pos1;
                }
              } else {
                result0 = null;
                pos = pos1;
              }
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
          if (result0 !== null) {
            result0 = (function(offset, mfe, s1) {
              var res = [];
              if ( mfe ) {
                res.push(mfe);
              }
              if ( s1 && s1.val ) {
                res.push( s1 );
              }
              return { type: "messageFormatPatternRight", statements : res };
            })(pos0, result0[2], result0[5]);
          }
          if (result0 === null) {
            pos = pos0;
          }
          return result0;
        }
        
        function parse_messageFormatElement() {
          var result0, result1, result2;
          var pos0, pos1, pos2;
          
          pos0 = pos;
          pos1 = pos;
          result0 = parse_id();
          if (result0 !== null) {
            pos2 = pos;
            if (input.charCodeAt(pos) === 44) {
              result1 = ",";
              pos++;
            } else {
              result1 = null;
              if (reportFailures === 0) {
                matchFailed("\",\"");
              }
            }
            if (result1 !== null) {
              result2 = parse_elementFormat();
              if (result2 !== null) {
                result1 = [result1, result2];
              } else {
                result1 = null;
                pos = pos2;
              }
            } else {
              result1 = null;
              pos = pos2;
            }
            result1 = result1 !== null ? result1 : "";
            if (result1 !== null) {
              result0 = [result0, result1];
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
          if (result0 !== null) {
            result0 = (function(offset, argIdx, efmt) {
              var res = { 
                type: "messageFormatElement",
                argumentIndex: argIdx
              };
              if ( efmt && efmt.length ) {
                res.elementFormat = efmt[1];
              }
              else {
                res.output = true;
              }
              return res;
            })(pos0, result0[0], result0[1]);
          }
          if (result0 === null) {
            pos = pos0;
          }
          return result0;
        }
        
        function parse_elementFormat() {
          var result0, result1, result2, result3, result4, result5, result6;
          var pos0, pos1;
          
          pos0 = pos;
          pos1 = pos;
          result0 = parse__();
          if (result0 !== null) {
            if (input.substr(pos, 6) === "plural") {
              result1 = "plural";
              pos += 6;
            } else {
              result1 = null;
              if (reportFailures === 0) {
                matchFailed("\"plural\"");
              }
            }
            if (result1 !== null) {
              result2 = parse__();
              if (result2 !== null) {
                if (input.charCodeAt(pos) === 44) {
                  result3 = ",";
                  pos++;
                } else {
                  result3 = null;
                  if (reportFailures === 0) {
                    matchFailed("\",\"");
                  }
                }
                if (result3 !== null) {
                  result4 = parse__();
                  if (result4 !== null) {
                    result5 = parse_pluralStyle();
                    if (result5 !== null) {
                      result6 = parse__();
                      if (result6 !== null) {
                        result0 = [result0, result1, result2, result3, result4, result5, result6];
                      } else {
                        result0 = null;
                        pos = pos1;
                      }
                    } else {
                      result0 = null;
                      pos = pos1;
                    }
                  } else {
                    result0 = null;
                    pos = pos1;
                  }
                } else {
                  result0 = null;
                  pos = pos1;
                }
              } else {
                result0 = null;
                pos = pos1;
              }
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
          if (result0 !== null) {
            result0 = (function(offset, t, s) {
              return {
                type : "elementFormat",
                key  : t,
                val  : s.val
              };
            })(pos0, result0[1], result0[5]);
          }
          if (result0 === null) {
            pos = pos0;
          }
          if (result0 === null) {
            pos0 = pos;
            pos1 = pos;
            result0 = parse__();
            if (result0 !== null) {
              if (input.substr(pos, 6) === "select") {
                result1 = "select";
                pos += 6;
              } else {
                result1 = null;
                if (reportFailures === 0) {
                  matchFailed("\"select\"");
                }
              }
              if (result1 !== null) {
                result2 = parse__();
                if (result2 !== null) {
                  if (input.charCodeAt(pos) === 44) {
                    result3 = ",";
                    pos++;
                  } else {
                    result3 = null;
                    if (reportFailures === 0) {
                      matchFailed("\",\"");
                    }
                  }
                  if (result3 !== null) {
                    result4 = parse__();
                    if (result4 !== null) {
                      result5 = parse_selectStyle();
                      if (result5 !== null) {
                        result6 = parse__();
                        if (result6 !== null) {
                          result0 = [result0, result1, result2, result3, result4, result5, result6];
                        } else {
                          result0 = null;
                          pos = pos1;
                        }
                      } else {
                        result0 = null;
                        pos = pos1;
                      }
                    } else {
                      result0 = null;
                      pos = pos1;
                    }
                  } else {
                    result0 = null;
                    pos = pos1;
                  }
                } else {
                  result0 = null;
                  pos = pos1;
                }
              } else {
                result0 = null;
                pos = pos1;
              }
            } else {
              result0 = null;
              pos = pos1;
            }
            if (result0 !== null) {
              result0 = (function(offset, t, s) {
                return {
                  type : "elementFormat",
                  key  : t,
                  val  : s.val
                };
              })(pos0, result0[1], result0[5]);
            }
            if (result0 === null) {
              pos = pos0;
            }
          }
          return result0;
        }
        
        function parse_pluralStyle() {
          var result0;
          var pos0;
          
          pos0 = pos;
          result0 = parse_pluralFormatPattern();
          if (result0 !== null) {
            result0 = (function(offset, pfp) {
              return { type: "pluralStyle", val: pfp };
            })(pos0, result0);
          }
          if (result0 === null) {
            pos = pos0;
          }
          return result0;
        }
        
        function parse_selectStyle() {
          var result0;
          var pos0;
          
          pos0 = pos;
          result0 = parse_selectFormatPattern();
          if (result0 !== null) {
            result0 = (function(offset, sfp) {
              return { type: "selectStyle", val: sfp };
            })(pos0, result0);
          }
          if (result0 === null) {
            pos = pos0;
          }
          return result0;
        }
        
        function parse_pluralFormatPattern() {
          var result0, result1, result2;
          var pos0, pos1;
          
          pos0 = pos;
          pos1 = pos;
          result0 = parse_offsetPattern();
          result0 = result0 !== null ? result0 : "";
          if (result0 !== null) {
            result1 = [];
            result2 = parse_pluralForms();
            while (result2 !== null) {
              result1.push(result2);
              result2 = parse_pluralForms();
            }
            if (result1 !== null) {
              result0 = [result0, result1];
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
          if (result0 !== null) {
            result0 = (function(offset, op, pf) {
              var res = {
                type: "pluralFormatPattern",
                pluralForms: pf
              };
              if ( op ) {
                res.offset = op;
              }
              else {
                res.offset = 0;
              }
              return res;
            })(pos0, result0[0], result0[1]);
          }
          if (result0 === null) {
            pos = pos0;
          }
          return result0;
        }
        
        function parse_offsetPattern() {
          var result0, result1, result2, result3, result4, result5, result6;
          var pos0, pos1;
          
          pos0 = pos;
          pos1 = pos;
          result0 = parse__();
          if (result0 !== null) {
            if (input.substr(pos, 6) === "offset") {
              result1 = "offset";
              pos += 6;
            } else {
              result1 = null;
              if (reportFailures === 0) {
                matchFailed("\"offset\"");
              }
            }
            if (result1 !== null) {
              result2 = parse__();
              if (result2 !== null) {
                if (input.charCodeAt(pos) === 58) {
                  result3 = ":";
                  pos++;
                } else {
                  result3 = null;
                  if (reportFailures === 0) {
                    matchFailed("\":\"");
                  }
                }
                if (result3 !== null) {
                  result4 = parse__();
                  if (result4 !== null) {
                    result5 = parse_digits();
                    if (result5 !== null) {
                      result6 = parse__();
                      if (result6 !== null) {
                        result0 = [result0, result1, result2, result3, result4, result5, result6];
                      } else {
                        result0 = null;
                        pos = pos1;
                      }
                    } else {
                      result0 = null;
                      pos = pos1;
                    }
                  } else {
                    result0 = null;
                    pos = pos1;
                  }
                } else {
                  result0 = null;
                  pos = pos1;
                }
              } else {
                result0 = null;
                pos = pos1;
              }
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
          if (result0 !== null) {
            result0 = (function(offset, d) {
              return d;
            })(pos0, result0[5]);
          }
          if (result0 === null) {
            pos = pos0;
          }
          return result0;
        }
        
        function parse_selectFormatPattern() {
          var result0, result1;
          var pos0;
          
          pos0 = pos;
          result0 = [];
          result1 = parse_pluralForms();
          while (result1 !== null) {
            result0.push(result1);
            result1 = parse_pluralForms();
          }
          if (result0 !== null) {
            result0 = (function(offset, pf) {
              return {
                type: "selectFormatPattern",
                pluralForms: pf
              };
            })(pos0, result0);
          }
          if (result0 === null) {
            pos = pos0;
          }
          return result0;
        }
        
        function parse_pluralForms() {
          var result0, result1, result2, result3, result4, result5, result6, result7;
          var pos0, pos1;
          
          pos0 = pos;
          pos1 = pos;
          result0 = parse__();
          if (result0 !== null) {
            result1 = parse_stringKey();
            if (result1 !== null) {
              result2 = parse__();
              if (result2 !== null) {
                if (input.charCodeAt(pos) === 123) {
                  result3 = "{";
                  pos++;
                } else {
                  result3 = null;
                  if (reportFailures === 0) {
                    matchFailed("\"{\"");
                  }
                }
                if (result3 !== null) {
                  result4 = parse__();
                  if (result4 !== null) {
                    result5 = parse_messageFormatPattern();
                    if (result5 !== null) {
                      result6 = parse__();
                      if (result6 !== null) {
                        if (input.charCodeAt(pos) === 125) {
                          result7 = "}";
                          pos++;
                        } else {
                          result7 = null;
                          if (reportFailures === 0) {
                            matchFailed("\"}\"");
                          }
                        }
                        if (result7 !== null) {
                          result0 = [result0, result1, result2, result3, result4, result5, result6, result7];
                        } else {
                          result0 = null;
                          pos = pos1;
                        }
                      } else {
                        result0 = null;
                        pos = pos1;
                      }
                    } else {
                      result0 = null;
                      pos = pos1;
                    }
                  } else {
                    result0 = null;
                    pos = pos1;
                  }
                } else {
                  result0 = null;
                  pos = pos1;
                }
              } else {
                result0 = null;
                pos = pos1;
              }
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
          if (result0 !== null) {
            result0 = (function(offset, k, mfp) {
              return {
                type: "pluralForms",
                key: k,
                val: mfp
              };
            })(pos0, result0[1], result0[5]);
          }
          if (result0 === null) {
            pos = pos0;
          }
          return result0;
        }
        
        function parse_stringKey() {
          var result0, result1;
          var pos0, pos1;
          
          pos0 = pos;
          result0 = parse_id();
          if (result0 !== null) {
            result0 = (function(offset, i) {
              return i;
            })(pos0, result0);
          }
          if (result0 === null) {
            pos = pos0;
          }
          if (result0 === null) {
            pos0 = pos;
            pos1 = pos;
            if (input.charCodeAt(pos) === 61) {
              result0 = "=";
              pos++;
            } else {
              result0 = null;
              if (reportFailures === 0) {
                matchFailed("\"=\"");
              }
            }
            if (result0 !== null) {
              result1 = parse_digits();
              if (result1 !== null) {
                result0 = [result0, result1];
              } else {
                result0 = null;
                pos = pos1;
              }
            } else {
              result0 = null;
              pos = pos1;
            }
            if (result0 !== null) {
              result0 = (function(offset, d) {
                return d;
              })(pos0, result0[1]);
            }
            if (result0 === null) {
              pos = pos0;
            }
          }
          return result0;
        }
        
        function parse_string() {
          var result0, result1, result2, result3, result4;
          var pos0, pos1, pos2;
          
          pos0 = pos;
          pos1 = pos;
          result0 = parse__();
          if (result0 !== null) {
            result1 = [];
            pos2 = pos;
            result2 = parse__();
            if (result2 !== null) {
              result3 = parse_chars();
              if (result3 !== null) {
                result4 = parse__();
                if (result4 !== null) {
                  result2 = [result2, result3, result4];
                } else {
                  result2 = null;
                  pos = pos2;
                }
              } else {
                result2 = null;
                pos = pos2;
              }
            } else {
              result2 = null;
              pos = pos2;
            }
            while (result2 !== null) {
              result1.push(result2);
              pos2 = pos;
              result2 = parse__();
              if (result2 !== null) {
                result3 = parse_chars();
                if (result3 !== null) {
                  result4 = parse__();
                  if (result4 !== null) {
                    result2 = [result2, result3, result4];
                  } else {
                    result2 = null;
                    pos = pos2;
                  }
                } else {
                  result2 = null;
                  pos = pos2;
                }
              } else {
                result2 = null;
                pos = pos2;
              }
            }
            if (result1 !== null) {
              result0 = [result0, result1];
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
          if (result0 !== null) {
            result0 = (function(offset, ws, s) {
              var tmp = [];
              for( var i = 0; i < s.length; ++i ) {
                for( var j = 0; j < s[ i ].length; ++j ) {
                  tmp.push(s[i][j]);
                }
              }
              return {
                type: "string",
                val: ws + tmp.join('')
              };
            })(pos0, result0[0], result0[1]);
          }
          if (result0 === null) {
            pos = pos0;
          }
          return result0;
        }
        
        function parse_id() {
          var result0, result1, result2, result3;
          var pos0, pos1;
          
          pos0 = pos;
          pos1 = pos;
          result0 = parse__();
          if (result0 !== null) {
            if (/^[a-zA-Z$_]/.test(input.charAt(pos))) {
              result1 = input.charAt(pos);
              pos++;
            } else {
              result1 = null;
              if (reportFailures === 0) {
                matchFailed("[a-zA-Z$_]");
              }
            }
            if (result1 !== null) {
              result2 = [];
              if (/^[^ \t\n\r,.+={}]/.test(input.charAt(pos))) {
                result3 = input.charAt(pos);
                pos++;
              } else {
                result3 = null;
                if (reportFailures === 0) {
                  matchFailed("[^ \\t\\n\\r,.+={}]");
                }
              }
              while (result3 !== null) {
                result2.push(result3);
                if (/^[^ \t\n\r,.+={}]/.test(input.charAt(pos))) {
                  result3 = input.charAt(pos);
                  pos++;
                } else {
                  result3 = null;
                  if (reportFailures === 0) {
                    matchFailed("[^ \\t\\n\\r,.+={}]");
                  }
                }
              }
              if (result2 !== null) {
                result3 = parse__();
                if (result3 !== null) {
                  result0 = [result0, result1, result2, result3];
                } else {
                  result0 = null;
                  pos = pos1;
                }
              } else {
                result0 = null;
                pos = pos1;
              }
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
          if (result0 !== null) {
            result0 = (function(offset, s1, s2) {
              return s1 + (s2 ? s2.join('') : '');
            })(pos0, result0[1], result0[2]);
          }
          if (result0 === null) {
            pos = pos0;
          }
          return result0;
        }
        
        function parse_chars() {
          var result0, result1;
          var pos0;
          
          pos0 = pos;
          result1 = parse_char();
          if (result1 !== null) {
            result0 = [];
            while (result1 !== null) {
              result0.push(result1);
              result1 = parse_char();
            }
          } else {
            result0 = null;
          }
          if (result0 !== null) {
            result0 = (function(offset, chars) { return chars.join(''); })(pos0, result0);
          }
          if (result0 === null) {
            pos = pos0;
          }
          return result0;
        }
        
        function parse_char() {
          var result0, result1, result2, result3, result4;
          var pos0, pos1;
          
          pos0 = pos;
          if (/^[^{}\\\0-\x1F \t\n\r]/.test(input.charAt(pos))) {
            result0 = input.charAt(pos);
            pos++;
          } else {
            result0 = null;
            if (reportFailures === 0) {
              matchFailed("[^{}\\\\\\0-\\x1F \\t\\n\\r]");
            }
          }
          if (result0 !== null) {
            result0 = (function(offset, x) {
              return x;
            })(pos0, result0);
          }
          if (result0 === null) {
            pos = pos0;
          }
          if (result0 === null) {
            pos0 = pos;
            if (input.substr(pos, 2) === "\\#") {
              result0 = "\\#";
              pos += 2;
            } else {
              result0 = null;
              if (reportFailures === 0) {
                matchFailed("\"\\\\#\"");
              }
            }
            if (result0 !== null) {
              result0 = (function(offset) {
                return "\\#";
              })(pos0);
            }
            if (result0 === null) {
              pos = pos0;
            }
            if (result0 === null) {
              pos0 = pos;
              if (input.substr(pos, 2) === "\\{") {
                result0 = "\\{";
                pos += 2;
              } else {
                result0 = null;
                if (reportFailures === 0) {
                  matchFailed("\"\\\\{\"");
                }
              }
              if (result0 !== null) {
                result0 = (function(offset) {
                  return "\u007B";
                })(pos0);
              }
              if (result0 === null) {
                pos = pos0;
              }
              if (result0 === null) {
                pos0 = pos;
                if (input.substr(pos, 2) === "\\}") {
                  result0 = "\\}";
                  pos += 2;
                } else {
                  result0 = null;
                  if (reportFailures === 0) {
                    matchFailed("\"\\\\}\"");
                  }
                }
                if (result0 !== null) {
                  result0 = (function(offset) {
                    return "\u007D";
                  })(pos0);
                }
                if (result0 === null) {
                  pos = pos0;
                }
                if (result0 === null) {
                  pos0 = pos;
                  pos1 = pos;
                  if (input.substr(pos, 2) === "\\u") {
                    result0 = "\\u";
                    pos += 2;
                  } else {
                    result0 = null;
                    if (reportFailures === 0) {
                      matchFailed("\"\\\\u\"");
                    }
                  }
                  if (result0 !== null) {
                    result1 = parse_hexDigit();
                    if (result1 !== null) {
                      result2 = parse_hexDigit();
                      if (result2 !== null) {
                        result3 = parse_hexDigit();
                        if (result3 !== null) {
                          result4 = parse_hexDigit();
                          if (result4 !== null) {
                            result0 = [result0, result1, result2, result3, result4];
                          } else {
                            result0 = null;
                            pos = pos1;
                          }
                        } else {
                          result0 = null;
                          pos = pos1;
                        }
                      } else {
                        result0 = null;
                        pos = pos1;
                      }
                    } else {
                      result0 = null;
                      pos = pos1;
                    }
                  } else {
                    result0 = null;
                    pos = pos1;
                  }
                  if (result0 !== null) {
                    result0 = (function(offset, h1, h2, h3, h4) {
                        return String.fromCharCode(parseInt("0x" + h1 + h2 + h3 + h4));
                    })(pos0, result0[1], result0[2], result0[3], result0[4]);
                  }
                  if (result0 === null) {
                    pos = pos0;
                  }
                }
              }
            }
          }
          return result0;
        }
        
        function parse_digits() {
          var result0, result1;
          var pos0;
          
          pos0 = pos;
          if (/^[0-9]/.test(input.charAt(pos))) {
            result1 = input.charAt(pos);
            pos++;
          } else {
            result1 = null;
            if (reportFailures === 0) {
              matchFailed("[0-9]");
            }
          }
          if (result1 !== null) {
            result0 = [];
            while (result1 !== null) {
              result0.push(result1);
              if (/^[0-9]/.test(input.charAt(pos))) {
                result1 = input.charAt(pos);
                pos++;
              } else {
                result1 = null;
                if (reportFailures === 0) {
                  matchFailed("[0-9]");
                }
              }
            }
          } else {
            result0 = null;
          }
          if (result0 !== null) {
            result0 = (function(offset, ds) {
              return parseInt((ds.join('')), 10);
            })(pos0, result0);
          }
          if (result0 === null) {
            pos = pos0;
          }
          return result0;
        }
        
        function parse_hexDigit() {
          var result0;
          
          if (/^[0-9a-fA-F]/.test(input.charAt(pos))) {
            result0 = input.charAt(pos);
            pos++;
          } else {
            result0 = null;
            if (reportFailures === 0) {
              matchFailed("[0-9a-fA-F]");
            }
          }
          return result0;
        }
        
        function parse__() {
          var result0, result1;
          var pos0;
          
          reportFailures++;
          pos0 = pos;
          result0 = [];
          result1 = parse_whitespace();
          while (result1 !== null) {
            result0.push(result1);
            result1 = parse_whitespace();
          }
          if (result0 !== null) {
            result0 = (function(offset, w) { return w.join(''); })(pos0, result0);
          }
          if (result0 === null) {
            pos = pos0;
          }
          reportFailures--;
          if (reportFailures === 0 && result0 === null) {
            matchFailed("whitespace");
          }
          return result0;
        }
        
        function parse_whitespace() {
          var result0;
          
          if (/^[ \t\n\r]/.test(input.charAt(pos))) {
            result0 = input.charAt(pos);
            pos++;
          } else {
            result0 = null;
            if (reportFailures === 0) {
              matchFailed("[ \\t\\n\\r]");
            }
          }
          return result0;
        }
        
        
        function cleanupExpected(expected) {
          expected.sort();
          
          var lastExpected = null;
          var cleanExpected = [];
          for (var i = 0; i < expected.length; i++) {
            if (expected[i] !== lastExpected) {
              cleanExpected.push(expected[i]);
              lastExpected = expected[i];
            }
          }
          return cleanExpected;
        }
        
        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 line = 1;
          var column = 1;
          var seenCR = false;
          
          for (var i = 0; i < Math.max(pos, rightmostFailuresPos); 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 };
        }
        
        
        var result = parseFunctions[startRule]();
        
        /*
         * The parser is now in one of the following three states:
         *
         * 1. The parser successfully parsed the whole input.
         *
         *    - |result !== null|
         *    - |pos === input.length|
         *    - |rightmostFailuresExpected| may or may not contain something
         *
         * 2. The parser successfully parsed only a part of the input.
         *
         *    - |result !== null|
         *    - |pos < input.length|
         *    - |rightmostFailuresExpected| may or may not contain something
         *
         * 3. The parser did not successfully parse any part of the input.
         *
         *   - |result === null|
         *   - |pos === 0|
         *   - |rightmostFailuresExpected| contains at least one failure
         *
         * All code following this comment (including called functions) must
         * handle these states.
         */
        if (result === null || pos !== input.length) {
          var offset = Math.max(pos, rightmostFailuresPos);
          var found = offset < input.length ? input.charAt(offset) : null;
          var errorPosition = computeErrorPosition();
          
          throw new this.SyntaxError(
            cleanupExpected(rightmostFailuresExpected),
            found,
            offset,
            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(expected, found, offset, line, column) {
      function buildMessage(expected, found) {
        var expectedHumanized, foundHumanized;
        
        switch (expected.length) {
          case 0:
            expectedHumanized = "end of input";
            break;
          case 1:
            expectedHumanized = expected[0];
            break;
          default:
            expectedHumanized = expected.slice(0, expected.length - 1).join(", ")
              + " or "
              + expected[expected.length - 1];
        }
        
        foundHumanized = found ? quote(found) : "end of input";
        
        return "Expected " + expectedHumanized + " but " + foundHumanized + " found.";
      }
      
      this.name = "SyntaxError";
      this.expected = expected;
      this.found = found;
      this.message = buildMessage(expected, found);
      this.offset = offset;
      this.line = line;
      this.column = column;
    };
    
    result.SyntaxError.prototype = Error.prototype;
    
    return result;
  })();

  MessageFormat.prototype.parse = function () {
    // Bind to itself so error handling works
    return mparser.parse.apply( mparser, arguments );
  };

  MessageFormat.prototype.precompile = function ( ast ) {
    var self = this,
        needOther = false,
        fp = {
      begin: 'function(d){\nvar r = "";\n',
      end  : "return r;\n}"
    };

    function interpMFP ( ast, data ) {
      // Set some default data
      data = data || {};
      var s = '', i, tmp, lastkeyname;

      switch ( ast.type ) {
        case 'program':
          return interpMFP( ast.program );
        case 'messageFormatPattern':
          for ( i = 0; i < ast.statements.length; ++i ) {
            s += interpMFP( ast.statements[i], data );
          }
          return fp.begin + s + fp.end;
        case 'messageFormatPatternRight':
          for ( i = 0; i < ast.statements.length; ++i ) {
            s += interpMFP( ast.statements[i], data );
          }
          return s;
        case 'messageFormatElement':
          data.pf_count = data.pf_count || 0;
          s += 'if(!d){\nthrow new Error("MessageFormat: No data passed to function.");\n}\n';
          if ( ast.output ) {
            s += 'r += d["' + ast.argumentIndex + '"];\n';
          }
          else {
            lastkeyname = 'lastkey_'+(data.pf_count+1);
            s += 'var '+lastkeyname+' = "'+ast.argumentIndex+'";\n';
            s += 'var k_'+(data.pf_count+1)+'=d['+lastkeyname+'];\n';
            s += interpMFP( ast.elementFormat, data );
          }
          return s;
        case 'elementFormat':
          if ( ast.key === 'select' ) {
            s += interpMFP( ast.val, data );
            s += 'r += (pf_' +
                 data.pf_count +
                 '[ k_' + (data.pf_count+1) + ' ] || pf_'+data.pf_count+'[ "other" ])( d );\n';
          }
          else if ( ast.key === 'plural' ) {
            s += interpMFP( ast.val, data );
            s += 'if ( pf_'+(data.pf_count)+'[ k_'+(data.pf_count+1)+' + "" ] ) {\n';
            s += 'r += pf_'+data.pf_count+'[ k_'+(data.pf_count+1)+' + "" ]( d ); \n';
            s += '}\nelse {\n';
            s += 'r += (pf_' +
                 data.pf_count +
                 '[ MessageFormat.locale["' +
                 self.fallbackLocale +
                 '"]( k_'+(data.pf_count+1)+' - off_'+(data.pf_count)+' ) ] || pf_'+data.pf_count+'[ "other" ] )( d );\n';
            s += '}\n';
          }
          return s;
        /* // Unreachable cases.
        case 'pluralStyle':
        case 'selectStyle':*/
        case 'pluralFormatPattern':
          data.pf_count = data.pf_count || 0;
          s += 'var off_'+data.pf_count+' = '+ast.offset+';\n';
          s += 'var pf_' + data.pf_count + ' = { \n';
          needOther = true;
          // We're going to simultaneously check to make sure we hit the required 'other' option.

          for ( i = 0; i < ast.pluralForms.length; ++i ) {
            if ( ast.pluralForms[ i ].key === 'other' ) {
              needOther = false;
            }
            if ( tmp ) {
              s += ',\n';
            }
            else{
              tmp = 1;
            }
            s += '"' + ast.pluralForms[ i ].key + '" : ' + interpMFP( ast.pluralForms[ i ].val,
          (function(){ var res = JSON.parse(JSON.stringify(data)); res.pf_count++; return res; })() );
          }
          s += '\n};\n';
          if ( needOther ) {
            throw new Error("No 'other' form found in pluralFormatPattern " + data.pf_count);
          }
          return s;
        case 'selectFormatPattern':

          data.pf_count = data.pf_count || 0;
          s += 'var off_'+data.pf_count+' = 0;\n';
          s += 'var pf_' + data.pf_count + ' = { \n';
          needOther = true;

          for ( i = 0; i < ast.pluralForms.length; ++i ) {
            if ( ast.pluralForms[ i ].key === 'other' ) {
              needOther = false;
            }
            if ( tmp ) {
              s += ',\n';
            }
            else{
              tmp = 1;
            }
            s += '"' + ast.pluralForms[ i ].key + '" : ' + interpMFP( ast.pluralForms[ i ].val,
              (function(){
                var res = JSON.parse( JSON.stringify( data ) );
                res.pf_count++;
                return res;
              })()
            );
          }
          s += '\n};\n';
          if ( needOther ) {
            throw new Error("No 'other' form found in selectFormatPattern " + data.pf_count);
          }
          return s;
        /* // Unreachable
        case 'pluralForms':
        */
        case 'string':
          return 'r += "' + MessageFormat.Utils.numSub(
            MessageFormat.Utils.escapeExpression( ast.val ),
            'k_' + data.pf_count + ' - off_' + ( data.pf_count - 1 ),
            data.pf_count
          ) + '";\n';
        default:
          throw new Error( 'Bad AST type: ' + ast.type );
      }
    }
    return interpMFP( ast );
  };

  MessageFormat.prototype.compile = function ( message ) {
    return (new Function( 'MessageFormat',
      'return ' +
        this.precompile(
          this.parse( message )
        )
    ))(MessageFormat);
  };


  if (typeof exports !== 'undefined') {
    if (typeof module !== 'undefined' && module.exports) {
      exports = module.exports = MessageFormat;
    }
    exports.MessageFormat = MessageFormat;
  }
  else if (typeof define === 'function' && define.amd) {
    define(function() {
      return MessageFormat;
    });
  }
  else {
    root['MessageFormat'] = MessageFormat;
  }

})( this );