the parsing solution?

2 files changed, 1196 insertions, 0 deletions

diff --git a/src/nodejs/alternative/parser.js b/src/nodejs/alternative/parser.js
new file mode 100644
index 0000000..ac10479
--- /dev/null
+++ b/src/nodejs/alternative/parser.js
@@ -0,0 +1,1168 @@
+exports.parser = parser = (function(){
+  /* Generated by PEG.js (http://pegjs.majda.cz/). */
+  
+  var result = {
+    /*
+     * 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 pos = 0;
+      var rightmostMatchFailuresPos = 0;
+      var rightmostMatchFailuresExpected = [];
+      var cache = {};
+      
+      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);
+        
+        if (charCode <= 0xFF) {
+          var escapeChar = 'x';
+          var length = 2;
+        } else {
+          var escapeChar = 'u';
+          var length = 4;
+        }
+        
+        return '\\' + escapeChar + padLeft(charCode.toString(16).toUpperCase(), '0', length);
+      }
+      
+      function quoteString(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
+          .replace(/[\x80-\uFFFF]/g, escape) // non-ASCII characters
+          + '"';
+      }
+      
+      function arrayContains(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;
+      }
+      
+      function matchFailed(failure) {
+        if (pos < rightmostMatchFailuresPos) {
+          return;
+        }
+        
+        if (pos > rightmostMatchFailuresPos) {
+          rightmostMatchFailuresPos = pos;
+          rightmostMatchFailuresExpected = [];
+        }
+        
+        if (!arrayContains(rightmostMatchFailuresExpected, failure)) {
+          rightmostMatchFailuresExpected.push(failure);
+        }
+      }
+      
+      function parse_url(context) {
+        var cacheKey = "url" + '@' + pos;
+        var cachedResult = cache[cacheKey];
+        if (cachedResult) {
+          pos = cachedResult.nextPos;
+          return cachedResult.result;
+        }
+        
+        
+        var savedPos1 = pos;
+        var result7 = parse_object(context);
+        if (result7 !== null) {
+          var result8 = parse_predicate(context);
+          if (result8 !== null) {
+            var result9 = parse_predicate(context);
+            if (result9 !== null) {
+              var result6 = [result7, result8, result9];
+            } else {
+              var result6 = null;
+              pos = savedPos1;
+            }
+          } else {
+            var result6 = null;
+            pos = savedPos1;
+          }
+        } else {
+          var result6 = null;
+          pos = savedPos1;
+        }
+        var result5 = result6 !== null
+          ? (function(object, p1, p2) { var result = {object:object}; if(p1.tags != undefined) {result.tags= p1.tags} else if(p1.bbox != undefined) {result.bbox=p1.bbox;} if(p2.tags != undefined) {result.tags= p2.tags} else if(p2.bbox != undefined) {result.bbox=p2.bbox;} return result;})(result6[0], result6[1], result6[2])
+          : null;
+        if (result5 !== null) {
+          var result0 = result5;
+        } else {
+          var savedPos0 = pos;
+          var result3 = parse_object(context);
+          if (result3 !== null) {
+            var result4 = parse_predicate(context);
+            if (result4 !== null) {
+              var result2 = [result3, result4];
+            } else {
+              var result2 = null;
+              pos = savedPos0;
+            }
+          } else {
+            var result2 = null;
+            pos = savedPos0;
+          }
+          if (result2 !== null) {
+            var result0 = result2;
+          } else {
+            var result1 = parse_object(context);
+            if (result1 !== null) {
+              var result0 = result1;
+            } else {
+              var result0 = null;;
+            };
+          };
+        }
+        
+        
+        
+        cache[cacheKey] = {
+          nextPos: pos,
+          result:  result0
+        };
+        return result0;
+      }
+      
+      function parse_object(context) {
+        var cacheKey = "object" + '@' + pos;
+        var cachedResult = cache[cacheKey];
+        if (cachedResult) {
+          pos = cachedResult.nextPos;
+          return cachedResult.result;
+        }
+        
+        
+        if (input.substr(pos, 4) === "node") {
+          var result8 = "node";
+          pos += 4;
+        } else {
+          var result8 = null;
+          if (context.reportMatchFailures) {
+            matchFailed(quoteString("node"));
+          }
+        }
+        var result7 = result8 !== null
+          ? (function(v) {return v})(result8)
+          : null;
+        if (result7 !== null) {
+          var result0 = result7;
+        } else {
+          if (input.substr(pos, 3) === "way") {
+            var result6 = "way";
+            pos += 3;
+          } else {
+            var result6 = null;
+            if (context.reportMatchFailures) {
+              matchFailed(quoteString("way"));
+            }
+          }
+          var result5 = result6 !== null
+            ? (function(v) {return v})(result6)
+            : null;
+          if (result5 !== null) {
+            var result0 = result5;
+          } else {
+            if (input.substr(pos, 8) === "relation") {
+              var result4 = "relation";
+              pos += 8;
+            } else {
+              var result4 = null;
+              if (context.reportMatchFailures) {
+                matchFailed(quoteString("relation"));
+              }
+            }
+            var result3 = result4 !== null
+              ? (function(v) {return v})(result4)
+              : null;
+            if (result3 !== null) {
+              var result0 = result3;
+            } else {
+              if (input.substr(pos, 1) === "*") {
+                var result2 = "*";
+                pos += 1;
+              } else {
+                var result2 = null;
+                if (context.reportMatchFailures) {
+                  matchFailed(quoteString("*"));
+                }
+              }
+              var result1 = result2 !== null
+                ? (function(v) {return v})(result2)
+                : null;
+              if (result1 !== null) {
+                var result0 = result1;
+              } else {
+                var result0 = null;;
+              };
+            };
+          };
+        }
+        
+        
+        
+        cache[cacheKey] = {
+          nextPos: pos,
+          result:  result0
+        };
+        return result0;
+      }
+      
+      function parse_predicate(context) {
+        var cacheKey = "predicate" + '@' + pos;
+        var cachedResult = cache[cacheKey];
+        if (cachedResult) {
+          pos = cachedResult.nextPos;
+          return cachedResult.result;
+        }
+        
+        
+        var result4 = parse_bboxpredicate(context);
+        if (result4 !== null) {
+          var result0 = result4;
+        } else {
+          var result3 = parse_tagpredicate(context);
+          var result2 = result3 !== null
+            ? (function(v) {return {tags:v}})(result3)
+            : null;
+          if (result2 !== null) {
+            var result0 = result2;
+          } else {
+            var result1 = parse_childpredicate(context);
+            if (result1 !== null) {
+              var result0 = result1;
+            } else {
+              var result0 = null;;
+            };
+          };
+        }
+        
+        
+        
+        cache[cacheKey] = {
+          nextPos: pos,
+          result:  result0
+        };
+        return result0;
+      }
+      
+      function parse_tagpredicate(context) {
+        var cacheKey = "tagpredicate" + '@' + pos;
+        var cachedResult = cache[cacheKey];
+        if (cachedResult) {
+          pos = cachedResult.nextPos;
+          return cachedResult.result;
+        }
+        
+        
+        var savedPos0 = pos;
+        if (input.substr(pos, 1) === "[") {
+          var result2 = "[";
+          pos += 1;
+        } else {
+          var result2 = null;
+          if (context.reportMatchFailures) {
+            matchFailed(quoteString("["));
+          }
+        }
+        if (result2 !== null) {
+          var result3 = parse_keys(context);
+          if (result3 !== null) {
+            if (input.substr(pos, 1) === "=") {
+              var result4 = "=";
+              pos += 1;
+            } else {
+              var result4 = null;
+              if (context.reportMatchFailures) {
+                matchFailed(quoteString("="));
+              }
+            }
+            if (result4 !== null) {
+              var result5 = parse_values(context);
+              if (result5 !== null) {
+                if (input.substr(pos, 1) === "]") {
+                  var result6 = "]";
+                  pos += 1;
+                } else {
+                  var result6 = null;
+                  if (context.reportMatchFailures) {
+                    matchFailed(quoteString("]"));
+                  }
+                }
+                if (result6 !== null) {
+                  var result1 = [result2, result3, result4, result5, result6];
+                } else {
+                  var result1 = null;
+                  pos = savedPos0;
+                }
+              } else {
+                var result1 = null;
+                pos = savedPos0;
+              }
+            } else {
+              var result1 = null;
+              pos = savedPos0;
+            }
+          } else {
+            var result1 = null;
+            pos = savedPos0;
+          }
+        } else {
+          var result1 = null;
+          pos = savedPos0;
+        }
+        var result0 = result1 !== null
+          ? (function(keys, values) {return {keys:keys, values:values}})(result1[1], result1[3])
+          : null;
+        
+        
+        
+        cache[cacheKey] = {
+          nextPos: pos,
+          result:  result0
+        };
+        return result0;
+      }
+      
+      function parse_childpredicate(context) {
+        var cacheKey = "childpredicate" + '@' + pos;
+        var cachedResult = cache[cacheKey];
+        if (cachedResult) {
+          pos = cachedResult.nextPos;
+          return cachedResult.result;
+        }
+        
+        
+        if (input.substr(pos, 7) === "not(nd)") {
+          var result0 = "not(nd)";
+          pos += 7;
+        } else {
+          var result0 = null;
+          if (context.reportMatchFailures) {
+            matchFailed(quoteString("not(nd)"));
+          }
+        }
+        
+        
+        
+        cache[cacheKey] = {
+          nextPos: pos,
+          result:  result0
+        };
+        return result0;
+      }
+      
+      function parse_bboxpredicate(context) {
+        var cacheKey = "bboxpredicate" + '@' + pos;
+        var cachedResult = cache[cacheKey];
+        if (cachedResult) {
+          pos = cachedResult.nextPos;
+          return cachedResult.result;
+        }
+        
+        
+        var savedPos0 = pos;
+        if (input.substr(pos, 6) === "[bbox=") {
+          var result2 = "[bbox=";
+          pos += 6;
+        } else {
+          var result2 = null;
+          if (context.reportMatchFailures) {
+            matchFailed(quoteString("[bbox="));
+          }
+        }
+        if (result2 !== null) {
+          var result3 = parse_float(context);
+          if (result3 !== null) {
+            if (input.substr(pos, 1) === ",") {
+              var result4 = ",";
+              pos += 1;
+            } else {
+              var result4 = null;
+              if (context.reportMatchFailures) {
+                matchFailed(quoteString(","));
+              }
+            }
+            if (result4 !== null) {
+              var result5 = parse_float(context);
+              if (result5 !== null) {
+                if (input.substr(pos, 1) === ",") {
+                  var result6 = ",";
+                  pos += 1;
+                } else {
+                  var result6 = null;
+                  if (context.reportMatchFailures) {
+                    matchFailed(quoteString(","));
+                  }
+                }
+                if (result6 !== null) {
+                  var result7 = parse_float(context);
+                  if (result7 !== null) {
+                    if (input.substr(pos, 1) === ",") {
+                      var result8 = ",";
+                      pos += 1;
+                    } else {
+                      var result8 = null;
+                      if (context.reportMatchFailures) {
+                        matchFailed(quoteString(","));
+                      }
+                    }
+                    if (result8 !== null) {
+                      var result9 = parse_float(context);
+                      if (result9 !== null) {
+                        if (input.substr(pos, 1) === "]") {
+                          var result10 = "]";
+                          pos += 1;
+                        } else {
+                          var result10 = null;
+                          if (context.reportMatchFailures) {
+                            matchFailed(quoteString("]"));
+                          }
+                        }
+                        if (result10 !== null) {
+                          var result1 = [result2, result3, result4, result5, result6, result7, result8, result9, result10];
+                        } else {
+                          var result1 = null;
+                          pos = savedPos0;
+                        }
+                      } else {
+                        var result1 = null;
+                        pos = savedPos0;
+                      }
+                    } else {
+                      var result1 = null;
+                      pos = savedPos0;
+                    }
+                  } else {
+                    var result1 = null;
+                    pos = savedPos0;
+                  }
+                } else {
+                  var result1 = null;
+                  pos = savedPos0;
+                }
+              } else {
+                var result1 = null;
+                pos = savedPos0;
+              }
+            } else {
+              var result1 = null;
+              pos = savedPos0;
+            }
+          } else {
+            var result1 = null;
+            pos = savedPos0;
+          }
+        } else {
+          var result1 = null;
+          pos = savedPos0;
+        }
+        var result0 = result1 !== null
+          ? (function(left, top, right, bottom) { return {bbox:{left:left,top:top,right:right,bottom:bottom}}})(result1[1], result1[3], result1[5], result1[7])
+          : null;
+        
+        
+        
+        cache[cacheKey] = {
+          nextPos: pos,
+          result:  result0
+        };
+        return result0;
+      }
+      
+      function parse_keys(context) {
+        var cacheKey = "keys" + '@' + pos;
+        var cachedResult = cache[cacheKey];
+        if (cachedResult) {
+          pos = cachedResult.nextPos;
+          return cachedResult.result;
+        }
+        
+        
+        var savedPos0 = pos;
+        var result5 = parse_key(context);
+        if (result5 !== null) {
+          var savedPos1 = pos;
+          if (input.substr(pos, 1) === "|") {
+            var result8 = "|";
+            pos += 1;
+          } else {
+            var result8 = null;
+            if (context.reportMatchFailures) {
+              matchFailed(quoteString("|"));
+            }
+          }
+          if (result8 !== null) {
+            var result9 = parse_keys(context);
+            if (result9 !== null) {
+              var result7 = [result8, result9];
+            } else {
+              var result7 = null;
+              pos = savedPos1;
+            }
+          } else {
+            var result7 = null;
+            pos = savedPos1;
+          }
+          if (result7 !== null) {
+            var result6 = [];
+            while (result7 !== null) {
+              result6.push(result7);
+              var savedPos1 = pos;
+              if (input.substr(pos, 1) === "|") {
+                var result8 = "|";
+                pos += 1;
+              } else {
+                var result8 = null;
+                if (context.reportMatchFailures) {
+                  matchFailed(quoteString("|"));
+                }
+              }
+              if (result8 !== null) {
+                var result9 = parse_keys(context);
+                if (result9 !== null) {
+                  var result7 = [result8, result9];
+                } else {
+                  var result7 = null;
+                  pos = savedPos1;
+                }
+              } else {
+                var result7 = null;
+                pos = savedPos1;
+              }
+            }
+          } else {
+            var result6 = null;
+          }
+          if (result6 !== null) {
+            var result4 = [result5, result6];
+          } else {
+            var result4 = null;
+            pos = savedPos0;
+          }
+        } else {
+          var result4 = null;
+          pos = savedPos0;
+        }
+        var result3 = result4 !== null
+          ? (function(key, keys) { var result = new Array(); result.push(key); return result.concat(keys[0][1])})(result4[0], result4[1])
+          : null;
+        if (result3 !== null) {
+          var result0 = result3;
+        } else {
+          var result2 = parse_key(context);
+          var result1 = result2 !== null
+            ? (function(key) { var result = new Array(); result.push(key); return result})(result2)
+            : null;
+          if (result1 !== null) {
+            var result0 = result1;
+          } else {
+            var result0 = null;;
+          };
+        }
+        
+        
+        
+        cache[cacheKey] = {
+          nextPos: pos,
+          result:  result0
+        };
+        return result0;
+      }
+      
+      function parse_values(context) {
+        var cacheKey = "values" + '@' + pos;
+        var cachedResult = cache[cacheKey];
+        if (cachedResult) {
+          pos = cachedResult.nextPos;
+          return cachedResult.result;
+        }
+        
+        
+        var savedPos0 = pos;
+        var result5 = parse_value(context);
+        if (result5 !== null) {
+          var savedPos1 = pos;
+          if (input.substr(pos, 1) === "|") {
+            var result8 = "|";
+            pos += 1;
+          } else {
+            var result8 = null;
+            if (context.reportMatchFailures) {
+              matchFailed(quoteString("|"));
+            }
+          }
+          if (result8 !== null) {
+            var result9 = parse_values(context);
+            if (result9 !== null) {
+              var result7 = [result8, result9];
+            } else {
+              var result7 = null;
+              pos = savedPos1;
+            }
+          } else {
+            var result7 = null;
+            pos = savedPos1;
+          }
+          if (result7 !== null) {
+            var result6 = [];
+            while (result7 !== null) {
+              result6.push(result7);
+              var savedPos1 = pos;
+              if (input.substr(pos, 1) === "|") {
+                var result8 = "|";
+                pos += 1;
+              } else {
+                var result8 = null;
+                if (context.reportMatchFailures) {
+                  matchFailed(quoteString("|"));
+                }
+              }
+              if (result8 !== null) {
+                var result9 = parse_values(context);
+                if (result9 !== null) {
+                  var result7 = [result8, result9];
+                } else {
+                  var result7 = null;
+                  pos = savedPos1;
+                }
+              } else {
+                var result7 = null;
+                pos = savedPos1;
+              }
+            }
+          } else {
+            var result6 = null;
+          }
+          if (result6 !== null) {
+            var result4 = [result5, result6];
+          } else {
+            var result4 = null;
+            pos = savedPos0;
+          }
+        } else {
+          var result4 = null;
+          pos = savedPos0;
+        }
+        var result3 = result4 !== null
+          ? (function(value, values) { var result = new Array(); result.push(value); return result.concat(values[0][1])})(result4[0], result4[1])
+          : null;
+        if (result3 !== null) {
+          var result0 = result3;
+        } else {
+          var result2 = parse_value(context);
+          var result1 = result2 !== null
+            ? (function(value) { var result = new Array(); result.push(value); return result})(result2)
+            : null;
+          if (result1 !== null) {
+            var result0 = result1;
+          } else {
+            var result0 = null;;
+          };
+        }
+        
+        
+        
+        cache[cacheKey] = {
+          nextPos: pos,
+          result:  result0
+        };
+        return result0;
+      }
+      
+      function parse_key(context) {
+        var cacheKey = "key" + '@' + pos;
+        var cachedResult = cache[cacheKey];
+        if (cachedResult) {
+          pos = cachedResult.nextPos;
+          return cachedResult.result;
+        }
+        
+        
+        var result2 = parse_letter(context);
+        if (result2 !== null) {
+          var result1 = [];
+          while (result2 !== null) {
+            result1.push(result2);
+            var result2 = parse_letter(context);
+          }
+        } else {
+          var result1 = null;
+        }
+        var result0 = result1 !== null
+          ? (function(key) {return key.join("")})(result1)
+          : null;
+        
+        
+        
+        cache[cacheKey] = {
+          nextPos: pos,
+          result:  result0
+        };
+        return result0;
+      }
+      
+      function parse_value(context) {
+        var cacheKey = "value" + '@' + pos;
+        var cachedResult = cache[cacheKey];
+        if (cachedResult) {
+          pos = cachedResult.nextPos;
+          return cachedResult.result;
+        }
+        
+        
+        var result2 = parse_letter(context);
+        if (result2 !== null) {
+          var result1 = [];
+          while (result2 !== null) {
+            result1.push(result2);
+            var result2 = parse_letter(context);
+          }
+        } else {
+          var result1 = null;
+        }
+        var result0 = result1 !== null
+          ? (function(value) {return value.join("")})(result1)
+          : null;
+        
+        
+        
+        cache[cacheKey] = {
+          nextPos: pos,
+          result:  result0
+        };
+        return result0;
+      }
+      
+      function parse_letter(context) {
+        var cacheKey = "letter" + '@' + pos;
+        var cachedResult = cache[cacheKey];
+        if (cachedResult) {
+          pos = cachedResult.nextPos;
+          return cachedResult.result;
+        }
+        
+        
+        if (input.substr(pos, 2) === "\\*") {
+          var result11 = "\\*";
+          pos += 2;
+        } else {
+          var result11 = null;
+          if (context.reportMatchFailures) {
+            matchFailed(quoteString("\\*"));
+          }
+        }
+        var result10 = result11 !== null
+          ? (function() {return "*"})()
+          : null;
+        if (result10 !== null) {
+          var result0 = result10;
+        } else {
+          if (input.substr(pos, 2) === "\\[") {
+            var result9 = "\\[";
+            pos += 2;
+          } else {
+            var result9 = null;
+            if (context.reportMatchFailures) {
+              matchFailed(quoteString("\\["));
+            }
+          }
+          var result8 = result9 !== null
+            ? (function() {return "["})()
+            : null;
+          if (result8 !== null) {
+            var result0 = result8;
+          } else {
+            if (input.substr(pos, 2) === "\\]") {
+              var result7 = "\\]";
+              pos += 2;
+            } else {
+              var result7 = null;
+              if (context.reportMatchFailures) {
+                matchFailed(quoteString("\\]"));
+              }
+            }
+            var result6 = result7 !== null
+              ? (function() {return "]" })()
+              : null;
+            if (result6 !== null) {
+              var result0 = result6;
+            } else {
+              if (input.substr(pos, 2) === "\\\\") {
+                var result5 = "\\\\";
+                pos += 2;
+              } else {
+                var result5 = null;
+                if (context.reportMatchFailures) {
+                  matchFailed(quoteString("\\\\"));
+                }
+              }
+              var result4 = result5 !== null
+                ? (function() {return "\\"})()
+                : null;
+              if (result4 !== null) {
+                var result0 = result4;
+              } else {
+                if (input.substr(pos, 2) === "\\|") {
+                  var result3 = "\\|";
+                  pos += 2;
+                } else {
+                  var result3 = null;
+                  if (context.reportMatchFailures) {
+                    matchFailed(quoteString("\\|"));
+                  }
+                }
+                var result2 = result3 !== null
+                  ? (function() {return "|" })()
+                  : null;
+                if (result2 !== null) {
+                  var result0 = result2;
+                } else {
+                  if (input.substr(pos).match(/^[^*|=\\\][]/) !== null) {
+                    var result1 = input.charAt(pos);
+                    pos++;
+                  } else {
+                    var result1 = null;
+                    if (context.reportMatchFailures) {
+                      matchFailed("[^*|=\\\\\\][]");
+                    }
+                  }
+                  if (result1 !== null) {
+                    var result0 = result1;
+                  } else {
+                    var result0 = null;;
+                  };
+                };
+              };
+            };
+          };
+        }
+        
+        
+        
+        cache[cacheKey] = {
+          nextPos: pos,
+          result:  result0
+        };
+        return result0;
+      }
+      
+      function parse_float(context) {
+        var cacheKey = "float" + '@' + pos;
+        var cachedResult = cache[cacheKey];
+        if (cachedResult) {
+          pos = cachedResult.nextPos;
+          return cachedResult.result;
+        }
+        
+        
+        var savedPos1 = pos;
+        if (input.substr(pos, 1) === "-") {
+          var result15 = "-";
+          pos += 1;
+        } else {
+          var result15 = null;
+          if (context.reportMatchFailures) {
+            matchFailed(quoteString("-"));
+          }
+        }
+        var result9 = result15 !== null ? result15 : '';
+        if (result9 !== null) {
+          if (input.substr(pos).match(/^[0-9]/) !== null) {
+            var result14 = input.charAt(pos);
+            pos++;
+          } else {
+            var result14 = null;
+            if (context.reportMatchFailures) {
+              matchFailed("[0-9]");
+            }
+          }
+          if (result14 !== null) {
+            var result10 = [];
+            while (result14 !== null) {
+              result10.push(result14);
+              if (input.substr(pos).match(/^[0-9]/) !== null) {
+                var result14 = input.charAt(pos);
+                pos++;
+              } else {
+                var result14 = null;
+                if (context.reportMatchFailures) {
+                  matchFailed("[0-9]");
+                }
+              }
+            }
+          } else {
+            var result10 = null;
+          }
+          if (result10 !== null) {
+            if (input.substr(pos, 1) === ".") {
+              var result11 = ".";
+              pos += 1;
+            } else {
+              var result11 = null;
+              if (context.reportMatchFailures) {
+                matchFailed(quoteString("."));
+              }
+            }
+            if (result11 !== null) {
+              if (input.substr(pos).match(/^[0-9]/) !== null) {
+                var result13 = input.charAt(pos);
+                pos++;
+              } else {
+                var result13 = null;
+                if (context.reportMatchFailures) {
+                  matchFailed("[0-9]");
+                }
+              }
+              if (result13 !== null) {
+                var result12 = [];
+                while (result13 !== null) {
+                  result12.push(result13);
+                  if (input.substr(pos).match(/^[0-9]/) !== null) {
+                    var result13 = input.charAt(pos);
+                    pos++;
+                  } else {
+                    var result13 = null;
+                    if (context.reportMatchFailures) {
+                      matchFailed("[0-9]");
+                    }
+                  }
+                }
+              } else {
+                var result12 = null;
+              }
+              if (result12 !== null) {
+                var result8 = [result9, result10, result11, result12];
+              } else {
+                var result8 = null;
+                pos = savedPos1;
+              }
+            } else {
+              var result8 = null;
+              pos = savedPos1;
+            }
+          } else {
+            var result8 = null;
+            pos = savedPos1;
+          }
+        } else {
+          var result8 = null;
+          pos = savedPos1;
+        }
+        var result7 = result8 !== null
+          ? (function(m, digits, digits2) { result = parseInt(digits.join(""))+parseFloat("0."+digits2.join("")); if(m == "-") {result=result*-1}; return result})(result8[0], result8[1], result8[3])
+          : null;
+        if (result7 !== null) {
+          var result0 = result7;
+        } else {
+          var savedPos0 = pos;
+          if (input.substr(pos, 1) === "-") {
+            var result6 = "-";
+            pos += 1;
+          } else {
+            var result6 = null;
+            if (context.reportMatchFailures) {
+              matchFailed(quoteString("-"));
+            }
+          }
+          var result3 = result6 !== null ? result6 : '';
+          if (result3 !== null) {
+            if (input.substr(pos).match(/^[0-9]/) !== null) {
+              var result5 = input.charAt(pos);
+              pos++;
+            } else {
+              var result5 = null;
+              if (context.reportMatchFailures) {
+                matchFailed("[0-9]");
+              }
+            }
+            if (result5 !== null) {
+              var result4 = [];
+              while (result5 !== null) {
+                result4.push(result5);
+                if (input.substr(pos).match(/^[0-9]/) !== null) {
+                  var result5 = input.charAt(pos);
+                  pos++;
+                } else {
+                  var result5 = null;
+                  if (context.reportMatchFailures) {
+                    matchFailed("[0-9]");
+                  }
+                }
+              }
+            } else {
+              var result4 = null;
+            }
+            if (result4 !== null) {
+              var result2 = [result3, result4];
+            } else {
+              var result2 = null;
+              pos = savedPos0;
+            }
+          } else {
+            var result2 = null;
+            pos = savedPos0;
+          }
+          var result1 = result2 !== null
+            ? (function(m, digits) { result =  parseInt(digits.join("")); if(m == "-") {result = result*-1}; return result})(result2[0], result2[1])
+            : null;
+          if (result1 !== null) {
+            var result0 = result1;
+          } else {
+            var result0 = null;;
+          };
+        }
+        
+        
+        
+        cache[cacheKey] = {
+          nextPos: pos,
+          result:  result0
+        };
+        return result0;
+      }
+      
+      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(rightmostMatchFailuresExpected);
+        var actualPos = Math.max(pos, rightmostMatchFailuresPos);
+        var actual = actualPos < input.length
+          ? quoteString(input.charAt(actualPos))
+          : '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 line = 1;
+        var column = 1;
+        var seenCR = false;
+        
+        for (var i = 0; i <  rightmostMatchFailuresPos; 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 = parse_url({ reportMatchFailures: true });
+      
+      /*
+       * The parser is now in one of the following three states:
+       *
+       * 1. The parser successfully parsed the whole input.
+       *
+       *    - |result !== null|
+       *    - |pos === input.length|
+       *    - |rightmostMatchFailuresExpected| may or may not contain something
+       *
+       * 2. The parser successfully parsed only a part of the input.
+       *
+       *    - |result !== null|
+       *    - |pos < input.length|
+       *    - |rightmostMatchFailuresExpected| may or may not contain something
+       *
+       * 3. The parser did not successfully parse any part of the input.
+       *
+       *   - |result === null|
+       *   - |pos === 0|
+       *   - |rightmostMatchFailuresExpected| contains at least one failure
+       *
+       * All code following this comment (including called functions) must
+       * handle these states.
+       */
+      if (result === null || 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;
+})();
diff --git a/src/nodejs/alternative/testgrammar b/src/nodejs/alternative/testgrammar
new file mode 100644
index 0000000..e212493
--- /dev/null
+++ b/src/nodejs/alternative/testgrammar
@@ -0,0 +1,28 @@
+/*
+ * Classic example grammar, which recognizes simple arithmetic expressions like
+ * "2*(3+4)". The parser generated from this grammar then computes their value.
+ */
+
+url = object:object p1:predicate p2:predicate { var result = {object:object}; if(p1.tags != undefined) {result.tags= p1.tags} else if(p1.bbox != undefined) {result.bbox=p1.bbox;} if(p2.tags != undefined) {result.tags= p2.tags} else if(p2.bbox != undefined) {result.bbox=p2.bbox;} return result;}/ object predicate / object
+
+object = v:"node" {return v} / v:"way"  {return v} / v:"relation" {return v} / v:"*" {return v}
+
+
+
+predicate = bboxpredicate / v:tagpredicate {return {tags:v}}/ childpredicate 
+
+tagpredicate = "["keys:keys"="values:values"]" {return {keys:keys, values:values}}
+
+childpredicate = "not(nd)"
+bboxpredicate = "[bbox=" left:float "," top:float","right:float","bottom:float"]" { return {bbox:{left:left,top:top,right:right,bottom:bottom}}}
+
+keys = key:key keys:("|" keys)+ { var result = new Array(); result.push(key); return result.concat(keys[0][1])} / key:key { var result = new Array(); result.push(key); return result}
+
+values = value:value values:("|" values)+ { var result = new Array(); result.push(value); return result.concat(values[0][1])} / value:value { var result = new Array(); result.push(value); return result}
+
+key = key:letter+ {return key.join("")}
+value = value:letter+ {return value.join("")}
+letter = "\\*" {return "*"} / "\\[" {return "["} / "\\]" {return "]" } / "\\\\" {return "\\"} / "\\|" {return "|" } / [^*|=\\\][]
+
+//add negative values
+float = m:"-"?digits:[0-9]+"."digits2:[0-9]+ { result = parseInt(digits.join(""))+parseFloat("0."+digits2.join("")); if(m == "-") {result=result*-1}; return result} / m:"-"?digits:[0-9]+ { result =  parseInt(digits.join("")); if(m == "-") {result = result*-1}; return result}