(function (global, factory) {
	typeof exports === 'object' && typeof module !== 'undefined' ? factory() :
	typeof define === 'function' && define.amd ? define(factory) :
	(factory());
}(this, (function () { 'use strict';

/*
 * Generated by PEG.js 0.10.0.
 *
 * http://pegjs.org/
 */
(function(root) {
  "use strict";

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

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

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

  peg$subclass(peg$SyntaxError, Error);

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

          "class": function(expectation) {
            var escapedParts = "",
                i;

            for (i = 0; i < expectation.parts.length; i++) {
              escapedParts += expectation.parts[i] instanceof Array
                ? classEscape(expectation.parts[i][0]) + "-" + classEscape(expectation.parts[i][1])
                : classEscape(expectation.parts[i]);
            }

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

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

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

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

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

    function literalEscape(s) {
      return s
        .replace(/\\/g, '\\\\')
        .replace(/"/g,  '\\"')
        .replace(/\0/g, '\\0')
        .replace(/\t/g, '\\t')
        .replace(/\n/g, '\\n')
        .replace(/\r/g, '\\r')
        .replace(/[\x00-\x0F]/g,          function(ch) { return '\\x0' + hex(ch); })
        .replace(/[\x10-\x1F\x7F-\x9F]/g, function(ch) { return '\\x'  + hex(ch); });
    }

    function classEscape(s) {
      return s
        .replace(/\\/g, '\\\\')
        .replace(/\]/g, '\\]')
        .replace(/\^/g, '\\^')
        .replace(/-/g,  '\\-')
        .replace(/\0/g, '\\0')
        .replace(/\t/g, '\\t')
        .replace(/\n/g, '\\n')
        .replace(/\r/g, '\\r')
        .replace(/[\x00-\x0F]/g,          function(ch) { return '\\x0' + hex(ch); })
        .replace(/[\x10-\x1F\x7F-\x9F]/g, function(ch) { return '\\x'  + hex(ch); });
    }

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

    function describeExpected(expected) {
      var descriptions = new Array(expected.length),
          i, j;

      for (i = 0; i < expected.length; i++) {
        descriptions[i] = describeExpectation(expected[i]);
      }

      descriptions.sort();

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

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

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

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

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

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

  function peg$parse(input, options) {
    options = options !== void 0 ? options : {};

    var peg$FAILED = {},

        peg$startRuleFunctions = { start: peg$parsestart },
        peg$startRuleFunction  = peg$parsestart,

        peg$c0 = "{",
        peg$c1 = peg$literalExpectation("{", false),
        peg$c2 = "}",
        peg$c3 = peg$literalExpectation("}", false),
        peg$c4 = function(strict, type, id, stmts) {
              return {type: type, id: id, strict: strict !== null, stmts: stmts};
            },
        peg$c5 = ";",
        peg$c6 = peg$literalExpectation(";", false),
        peg$c7 = function(first, rest) {
              var result = [first];
              for (var i = 0; i < rest.length; ++i) {
                result.push(rest[i][1]);
              }
              return result;
            },
        peg$c8 = function(type, attrs) {
              return { type: "attr", attrType: type, attrs: attrs || {}};
            },
        peg$c9 = "=",
        peg$c10 = peg$literalExpectation("=", false),
        peg$c11 = function(k, v) {
              var attrs = {};
              attrs[k] = v;
              return { type: "inlineAttr", attrs: attrs };
            },
        peg$c12 = function(id, attrs) { return {type: "node", id: id, attrs: attrs || {}}; },
        peg$c13 = function(lhs, rhs, attrs) {
              var elems = [lhs];
              for (var i = 0; i < rhs.length; ++i) {
                elems.push(rhs[i]);
              }
              return { type: "edge", elems: elems, attrs: attrs || {} };
            },
        peg$c14 = function(id, stmts) {
              id = (id && id[2]) || [];
              return { type: "subgraph", id: id[0], stmts: stmts };
            },
        peg$c15 = function(first, rest) {
              var result = first;
              for (var i = 0; i < rest.length; ++i) {
                merge(result, rest[i][1]);
              }
              return result;
            },
        peg$c16 = "[",
        peg$c17 = peg$literalExpectation("[", false),
        peg$c18 = "]",
        peg$c19 = peg$literalExpectation("]", false),
        peg$c20 = function(aList) { return aList; },
        peg$c21 = ",",
        peg$c22 = peg$literalExpectation(",", false),
        peg$c23 = function(first, rest) {
              var result = first;
              for (var i = 0; i < rest.length; ++i) {
                _.merge(result, rest[i][3]);
              }
              return result;
            },
        peg$c24 = "--",
        peg$c25 = peg$literalExpectation("--", false),
        peg$c26 = function() { return directed; },
        peg$c27 = "->",
        peg$c28 = peg$literalExpectation("->", false),
        peg$c29 = function(rhs, rest) {
              var result = [rhs];
              if (rest) {
                for (var i = 0; i < rest.length; ++i) {
                  result.push(rest[i]);
                }
              }
              return result;
            },
        peg$c30 = function(k, v) {
              var result = {};
              result[k] = v[3];
              return result;
            },
        peg$c31 = function(id) { return { type: "node", id: id, attrs: {} }; },
        peg$c32 = function(id) { return id; },
        peg$c33 = ":",
        peg$c34 = peg$literalExpectation(":", false),
        peg$c35 = "ne",
        peg$c36 = peg$literalExpectation("ne", false),
        peg$c37 = "se",
        peg$c38 = peg$literalExpectation("se", false),
        peg$c39 = "sw",
        peg$c40 = peg$literalExpectation("sw", false),
        peg$c41 = "nw",
        peg$c42 = peg$literalExpectation("nw", false),
        peg$c43 = "n",
        peg$c44 = peg$literalExpectation("n", false),
        peg$c45 = "e",
        peg$c46 = peg$literalExpectation("e", false),
        peg$c47 = "s",
        peg$c48 = peg$literalExpectation("s", false),
        peg$c49 = "w",
        peg$c50 = peg$literalExpectation("w", false),
        peg$c51 = "c",
        peg$c52 = peg$literalExpectation("c", false),
        peg$c53 = "_",
        peg$c54 = peg$literalExpectation("_", false),
        peg$c55 = peg$otherExpectation("identifier"),
        peg$c56 = /^[a-zA-Z\u0200-\u0377_]/,
        peg$c57 = peg$classExpectation([["a", "z"], ["A", "Z"], ["\u0200", "\u0377"], "_"], false, false),
        peg$c58 = /^[a-zA-Z\u0200-\u0377_0-9]/,
        peg$c59 = peg$classExpectation([["a", "z"], ["A", "Z"], ["\u0200", "\u0377"], "_", ["0", "9"]], false, false),
        peg$c60 = function(fst, rest) { return fst + rest.join(""); },
        peg$c61 = "-",
        peg$c62 = peg$literalExpectation("-", false),
        peg$c63 = ".",
        peg$c64 = peg$literalExpectation(".", false),
        peg$c65 = /^[0-9]/,
        peg$c66 = peg$classExpectation([["0", "9"]], false, false),
        peg$c67 = function(sign, dot, after) {
              return (sign || "") + dot + after.join("");
            },
        peg$c68 = function(sign, before, after) {
              return (sign || "") + before.join("") + (after ? after[0] : "") + (after ? after[1].join("") : "");
            },
        peg$c69 = "\"",
        peg$c70 = peg$literalExpectation("\"", false),
        peg$c71 = "\\\"",
        peg$c72 = peg$literalExpectation("\\\"", false),
        peg$c73 = function() { return '"'; },
        peg$c74 = "\\",
        peg$c75 = peg$literalExpectation("\\", false),
        peg$c76 = /^[^"]/,
        peg$c77 = peg$classExpectation(["\""], true, false),
        peg$c78 = function(ch) { return "\\" + ch; },
        peg$c79 = function(id) {
              return id.join("");
            },
        peg$c80 = "node",
        peg$c81 = peg$literalExpectation("node", true),
        peg$c82 = function(k) { return k.toLowerCase(); },
        peg$c83 = "edge",
        peg$c84 = peg$literalExpectation("edge", true),
        peg$c85 = "graph",
        peg$c86 = peg$literalExpectation("graph", true),
        peg$c87 = "digraph",
        peg$c88 = peg$literalExpectation("digraph", true),
        peg$c89 = "subgraph",
        peg$c90 = peg$literalExpectation("subgraph", true),
        peg$c91 = "strict",
        peg$c92 = peg$literalExpectation("strict", true),
        peg$c93 = function(graph) {
              directed = graph === "digraph";
              return graph;
            },
        peg$c94 = peg$otherExpectation("whitespace"),
        peg$c95 = /^[ \t\r\n]/,
        peg$c96 = peg$classExpectation([" ", "\t", "\r", "\n"], false, false),
        peg$c97 = peg$otherExpectation("comment"),
        peg$c98 = "//",
        peg$c99 = peg$literalExpectation("//", false),
        peg$c100 = /^[^\n]/,
        peg$c101 = peg$classExpectation(["\n"], true, false),
        peg$c102 = "/*",
        peg$c103 = peg$literalExpectation("/*", false),
        peg$c104 = "*/",
        peg$c105 = peg$literalExpectation("*/", false),
        peg$c106 = peg$anyExpectation(),

        peg$currPos          = 0,
        peg$savedPos         = 0,
        peg$posDetailsCache  = [{ line: 1, column: 1 }],
        peg$maxFailPos       = 0,
        peg$maxFailExpected  = [],
        peg$silentFails      = 0,

        peg$result;

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

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

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

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

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

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

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

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

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

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

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

          p++;
        }

        peg$posDetailsCache[pos] = details;
        return details;
      }
    }

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

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

    function peg$fail(expected) {
      if (peg$currPos < peg$maxFailPos) { return; }

      if (peg$currPos > peg$maxFailPos) {
        peg$maxFailPos = peg$currPos;
        peg$maxFailExpected = [];
      }

      peg$maxFailExpected.push(expected);
    }

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

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

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

      return s0;
    }

    function peg$parsegraphStmt() {
      var s0, s1, s2, s3, s4, s5, s6, s7, s8, s9, s10, s11, s12, s13;

      s0 = peg$currPos;
      s1 = [];
      s2 = peg$parse_();
      while (s2 !== peg$FAILED) {
        s1.push(s2);
        s2 = peg$parse_();
      }
      if (s1 !== peg$FAILED) {
        s2 = peg$currPos;
        s3 = peg$parsestrict();
        if (s3 !== peg$FAILED) {
          s4 = peg$parse_();
          if (s4 !== peg$FAILED) {
            s3 = [s3, s4];
            s2 = s3;
          } else {
            peg$currPos = s2;
            s2 = peg$FAILED;
          }
        } else {
          peg$currPos = s2;
          s2 = peg$FAILED;
        }
        if (s2 === peg$FAILED) {
          s2 = null;
        }
        if (s2 !== peg$FAILED) {
          s3 = peg$parsegraphType();
          if (s3 !== peg$FAILED) {
            s4 = [];
            s5 = peg$parse_();
            while (s5 !== peg$FAILED) {
              s4.push(s5);
              s5 = peg$parse_();
            }
            if (s4 !== peg$FAILED) {
              s5 = peg$parseid();
              if (s5 === peg$FAILED) {
                s5 = null;
              }
              if (s5 !== peg$FAILED) {
                s6 = [];
                s7 = peg$parse_();
                while (s7 !== peg$FAILED) {
                  s6.push(s7);
                  s7 = peg$parse_();
                }
                if (s6 !== peg$FAILED) {
                  if (input.charCodeAt(peg$currPos) === 123) {
                    s7 = peg$c0;
                    peg$currPos++;
                  } else {
                    s7 = peg$FAILED;
                    if (peg$silentFails === 0) { peg$fail(peg$c1); }
                  }
                  if (s7 !== peg$FAILED) {
                    s8 = [];
                    s9 = peg$parse_();
                    while (s9 !== peg$FAILED) {
                      s8.push(s9);
                      s9 = peg$parse_();
                    }
                    if (s8 !== peg$FAILED) {
                      s9 = peg$parsestmtList();
                      if (s9 === peg$FAILED) {
                        s9 = null;
                      }
                      if (s9 !== peg$FAILED) {
                        s10 = [];
                        s11 = peg$parse_();
                        while (s11 !== peg$FAILED) {
                          s10.push(s11);
                          s11 = peg$parse_();
                        }
                        if (s10 !== peg$FAILED) {
                          if (input.charCodeAt(peg$currPos) === 125) {
                            s11 = peg$c2;
                            peg$currPos++;
                          } else {
                            s11 = peg$FAILED;
                            if (peg$silentFails === 0) { peg$fail(peg$c3); }
                          }
                          if (s11 !== peg$FAILED) {
                            s12 = [];
                            s13 = peg$parse_();
                            while (s13 !== peg$FAILED) {
                              s12.push(s13);
                              s13 = peg$parse_();
                            }
                            if (s12 !== peg$FAILED) {
                              s1 = peg$c4(s2, s3, s5, s9);
                              s0 = s1;
                            } else {
                              peg$currPos = s0;
                              s0 = peg$FAILED;
                            }
                          } else {
                            peg$currPos = s0;
                            s0 = peg$FAILED;
                          }
                        } else {
                          peg$currPos = s0;
                          s0 = peg$FAILED;
                        }
                      } else {
                        peg$currPos = s0;
                        s0 = peg$FAILED;
                      }
                    } else {
                      peg$currPos = s0;
                      s0 = peg$FAILED;
                    }
                  } else {
                    peg$currPos = s0;
                    s0 = peg$FAILED;
                  }
                } else {
                  peg$currPos = s0;
                  s0 = peg$FAILED;
                }
              } else {
                peg$currPos = s0;
                s0 = peg$FAILED;
              }
            } else {
              peg$currPos = s0;
              s0 = peg$FAILED;
            }
          } else {
            peg$currPos = s0;
            s0 = peg$FAILED;
          }
        } else {
          peg$currPos = s0;
          s0 = peg$FAILED;
        }
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }

      return s0;
    }

    function peg$parsestmtList() {
      var s0, s1, s2, s3, s4, s5, s6, s7, s8, s9;

      s0 = peg$currPos;
      s1 = peg$parsestmt();
      if (s1 !== peg$FAILED) {
        s2 = [];
        s3 = peg$parse_();
        while (s3 !== peg$FAILED) {
          s2.push(s3);
          s3 = peg$parse_();
        }
        if (s2 !== peg$FAILED) {
          if (input.charCodeAt(peg$currPos) === 59) {
            s3 = peg$c5;
            peg$currPos++;
          } else {
            s3 = peg$FAILED;
            if (peg$silentFails === 0) { peg$fail(peg$c6); }
          }
          if (s3 === peg$FAILED) {
            s3 = null;
          }
          if (s3 !== peg$FAILED) {
            s4 = [];
            s5 = peg$currPos;
            s6 = [];
            s7 = peg$parse_();
            while (s7 !== peg$FAILED) {
              s6.push(s7);
              s7 = peg$parse_();
            }
            if (s6 !== peg$FAILED) {
              s7 = peg$parsestmt();
              if (s7 !== peg$FAILED) {
                s8 = [];
                s9 = peg$parse_();
                while (s9 !== peg$FAILED) {
                  s8.push(s9);
                  s9 = peg$parse_();
                }
                if (s8 !== peg$FAILED) {
                  if (input.charCodeAt(peg$currPos) === 59) {
                    s9 = peg$c5;
                    peg$currPos++;
                  } else {
                    s9 = peg$FAILED;
                    if (peg$silentFails === 0) { peg$fail(peg$c6); }
                  }
                  if (s9 === peg$FAILED) {
                    s9 = null;
                  }
                  if (s9 !== peg$FAILED) {
                    s6 = [s6, s7, s8, s9];
                    s5 = s6;
                  } else {
                    peg$currPos = s5;
                    s5 = peg$FAILED;
                  }
                } else {
                  peg$currPos = s5;
                  s5 = peg$FAILED;
                }
              } else {
                peg$currPos = s5;
                s5 = peg$FAILED;
              }
            } else {
              peg$currPos = s5;
              s5 = peg$FAILED;
            }
            while (s5 !== peg$FAILED) {
              s4.push(s5);
              s5 = peg$currPos;
              s6 = [];
              s7 = peg$parse_();
              while (s7 !== peg$FAILED) {
                s6.push(s7);
                s7 = peg$parse_();
              }
              if (s6 !== peg$FAILED) {
                s7 = peg$parsestmt();
                if (s7 !== peg$FAILED) {
                  s8 = [];
                  s9 = peg$parse_();
                  while (s9 !== peg$FAILED) {
                    s8.push(s9);
                    s9 = peg$parse_();
                  }
                  if (s8 !== peg$FAILED) {
                    if (input.charCodeAt(peg$currPos) === 59) {
                      s9 = peg$c5;
                      peg$currPos++;
                    } else {
                      s9 = peg$FAILED;
                      if (peg$silentFails === 0) { peg$fail(peg$c6); }
                    }
                    if (s9 === peg$FAILED) {
                      s9 = null;
                    }
                    if (s9 !== peg$FAILED) {
                      s6 = [s6, s7, s8, s9];
                      s5 = s6;
                    } else {
                      peg$currPos = s5;
                      s5 = peg$FAILED;
                    }
                  } else {
                    peg$currPos = s5;
                    s5 = peg$FAILED;
                  }
                } else {
                  peg$currPos = s5;
                  s5 = peg$FAILED;
                }
              } else {
                peg$currPos = s5;
                s5 = peg$FAILED;
              }
            }
            if (s4 !== peg$FAILED) {
              s1 = peg$c7(s1, s4);
              s0 = s1;
            } else {
              peg$currPos = s0;
              s0 = peg$FAILED;
            }
          } else {
            peg$currPos = s0;
            s0 = peg$FAILED;
          }
        } else {
          peg$currPos = s0;
          s0 = peg$FAILED;
        }
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }

      return s0;
    }

    function peg$parsestmt() {
      var s0;

      s0 = peg$parseattrStmt();
      if (s0 === peg$FAILED) {
        s0 = peg$parseedgeStmt();
        if (s0 === peg$FAILED) {
          s0 = peg$parsesubgraphStmt();
          if (s0 === peg$FAILED) {
            s0 = peg$parseinlineAttrStmt();
            if (s0 === peg$FAILED) {
              s0 = peg$parsenodeStmt();
            }
          }
        }
      }

      return s0;
    }

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

      s0 = peg$currPos;
      s1 = peg$parsegraph();
      if (s1 === peg$FAILED) {
        s1 = peg$parsenode();
        if (s1 === peg$FAILED) {
          s1 = peg$parseedge();
        }
      }
      if (s1 !== peg$FAILED) {
        s2 = [];
        s3 = peg$parse_();
        while (s3 !== peg$FAILED) {
          s2.push(s3);
          s3 = peg$parse_();
        }
        if (s2 !== peg$FAILED) {
          s3 = peg$parseattrList();
          if (s3 !== peg$FAILED) {
            s1 = peg$c8(s1, s3);
            s0 = s1;
          } else {
            peg$currPos = s0;
            s0 = peg$FAILED;
          }
        } else {
          peg$currPos = s0;
          s0 = peg$FAILED;
        }
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }

      return s0;
    }

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

      s0 = peg$currPos;
      s1 = peg$parseid();
      if (s1 !== peg$FAILED) {
        s2 = [];
        s3 = peg$parse_();
        while (s3 !== peg$FAILED) {
          s2.push(s3);
          s3 = peg$parse_();
        }
        if (s2 !== peg$FAILED) {
          if (input.charCodeAt(peg$currPos) === 61) {
            s3 = peg$c9;
            peg$currPos++;
          } else {
            s3 = peg$FAILED;
            if (peg$silentFails === 0) { peg$fail(peg$c10); }
          }
          if (s3 !== peg$FAILED) {
            s4 = [];
            s5 = peg$parse_();
            while (s5 !== peg$FAILED) {
              s4.push(s5);
              s5 = peg$parse_();
            }
            if (s4 !== peg$FAILED) {
              s5 = peg$parseid();
              if (s5 !== peg$FAILED) {
                s1 = peg$c11(s1, s5);
                s0 = s1;
              } else {
                peg$currPos = s0;
                s0 = peg$FAILED;
              }
            } else {
              peg$currPos = s0;
              s0 = peg$FAILED;
            }
          } else {
            peg$currPos = s0;
            s0 = peg$FAILED;
          }
        } else {
          peg$currPos = s0;
          s0 = peg$FAILED;
        }
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }

      return s0;
    }

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

      s0 = peg$currPos;
      s1 = peg$parsenodeId();
      if (s1 !== peg$FAILED) {
        s2 = [];
        s3 = peg$parse_();
        while (s3 !== peg$FAILED) {
          s2.push(s3);
          s3 = peg$parse_();
        }
        if (s2 !== peg$FAILED) {
          s3 = peg$parseattrList();
          if (s3 === peg$FAILED) {
            s3 = null;
          }
          if (s3 !== peg$FAILED) {
            s1 = peg$c12(s1, s3);
            s0 = s1;
          } else {
            peg$currPos = s0;
            s0 = peg$FAILED;
          }
        } else {
          peg$currPos = s0;
          s0 = peg$FAILED;
        }
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }

      return s0;
    }

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

      s0 = peg$currPos;
      s1 = peg$parsenodeIdOrSubgraph();
      if (s1 !== peg$FAILED) {
        s2 = [];
        s3 = peg$parse_();
        while (s3 !== peg$FAILED) {
          s2.push(s3);
          s3 = peg$parse_();
        }
        if (s2 !== peg$FAILED) {
          s3 = peg$parseedgeRHS();
          if (s3 !== peg$FAILED) {
            s4 = [];
            s5 = peg$parse_();
            while (s5 !== peg$FAILED) {
              s4.push(s5);
              s5 = peg$parse_();
            }
            if (s4 !== peg$FAILED) {
              s5 = peg$parseattrList();
              if (s5 === peg$FAILED) {
                s5 = null;
              }
              if (s5 !== peg$FAILED) {
                s1 = peg$c13(s1, s3, s5);
                s0 = s1;
              } else {
                peg$currPos = s0;
                s0 = peg$FAILED;
              }
            } else {
              peg$currPos = s0;
              s0 = peg$FAILED;
            }
          } else {
            peg$currPos = s0;
            s0 = peg$FAILED;
          }
        } else {
          peg$currPos = s0;
          s0 = peg$FAILED;
        }
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }

      return s0;
    }

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

      s0 = peg$currPos;
      s1 = peg$currPos;
      s2 = peg$parsesubgraph();
      if (s2 !== peg$FAILED) {
        s3 = [];
        s4 = peg$parse_();
        while (s4 !== peg$FAILED) {
          s3.push(s4);
          s4 = peg$parse_();
        }
        if (s3 !== peg$FAILED) {
          s4 = peg$currPos;
          s5 = peg$parseid();
          if (s5 !== peg$FAILED) {
            s6 = [];
            s7 = peg$parse_();
            while (s7 !== peg$FAILED) {
              s6.push(s7);
              s7 = peg$parse_();
            }
            if (s6 !== peg$FAILED) {
              s5 = [s5, s6];
              s4 = s5;
            } else {
              peg$currPos = s4;
              s4 = peg$FAILED;
            }
          } else {
            peg$currPos = s4;
            s4 = peg$FAILED;
          }
          if (s4 === peg$FAILED) {
            s4 = null;
          }
          if (s4 !== peg$FAILED) {
            s2 = [s2, s3, s4];
            s1 = s2;
          } else {
            peg$currPos = s1;
            s1 = peg$FAILED;
          }
        } else {
          peg$currPos = s1;
          s1 = peg$FAILED;
        }
      } else {
        peg$currPos = s1;
        s1 = peg$FAILED;
      }
      if (s1 === peg$FAILED) {
        s1 = null;
      }
      if (s1 !== peg$FAILED) {
        if (input.charCodeAt(peg$currPos) === 123) {
          s2 = peg$c0;
          peg$currPos++;
        } else {
          s2 = peg$FAILED;
          if (peg$silentFails === 0) { peg$fail(peg$c1); }
        }
        if (s2 !== peg$FAILED) {
          s3 = [];
          s4 = peg$parse_();
          while (s4 !== peg$FAILED) {
            s3.push(s4);
            s4 = peg$parse_();
          }
          if (s3 !== peg$FAILED) {
            s4 = peg$parsestmtList();
            if (s4 === peg$FAILED) {
              s4 = null;
            }
            if (s4 !== peg$FAILED) {
              s5 = [];
              s6 = peg$parse_();
              while (s6 !== peg$FAILED) {
                s5.push(s6);
                s6 = peg$parse_();
              }
              if (s5 !== peg$FAILED) {
                if (input.charCodeAt(peg$currPos) === 125) {
                  s6 = peg$c2;
                  peg$currPos++;
                } else {
                  s6 = peg$FAILED;
                  if (peg$silentFails === 0) { peg$fail(peg$c3); }
                }
                if (s6 !== peg$FAILED) {
                  s1 = peg$c14(s1, s4);
                  s0 = s1;
                } else {
                  peg$currPos = s0;
                  s0 = peg$FAILED;
                }
              } else {
                peg$currPos = s0;
                s0 = peg$FAILED;
              }
            } else {
              peg$currPos = s0;
              s0 = peg$FAILED;
            }
          } else {
            peg$currPos = s0;
            s0 = peg$FAILED;
          }
        } else {
          peg$currPos = s0;
          s0 = peg$FAILED;
        }
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }

      return s0;
    }

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

      s0 = peg$currPos;
      s1 = peg$parseattrListBlock();
      if (s1 !== peg$FAILED) {
        s2 = [];
        s3 = peg$currPos;
        s4 = [];
        s5 = peg$parse_();
        while (s5 !== peg$FAILED) {
          s4.push(s5);
          s5 = peg$parse_();
        }
        if (s4 !== peg$FAILED) {
          s5 = peg$parseattrListBlock();
          if (s5 !== peg$FAILED) {
            s4 = [s4, s5];
            s3 = s4;
          } else {
            peg$currPos = s3;
            s3 = peg$FAILED;
          }
        } else {
          peg$currPos = s3;
          s3 = peg$FAILED;
        }
        while (s3 !== peg$FAILED) {
          s2.push(s3);
          s3 = peg$currPos;
          s4 = [];
          s5 = peg$parse_();
          while (s5 !== peg$FAILED) {
            s4.push(s5);
            s5 = peg$parse_();
          }
          if (s4 !== peg$FAILED) {
            s5 = peg$parseattrListBlock();
            if (s5 !== peg$FAILED) {
              s4 = [s4, s5];
              s3 = s4;
            } else {
              peg$currPos = s3;
              s3 = peg$FAILED;
            }
          } else {
            peg$currPos = s3;
            s3 = peg$FAILED;
          }
        }
        if (s2 !== peg$FAILED) {
          s1 = peg$c15(s1, s2);
          s0 = s1;
        } else {
          peg$currPos = s0;
          s0 = peg$FAILED;
        }
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }

      return s0;
    }

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

      s0 = peg$currPos;
      if (input.charCodeAt(peg$currPos) === 91) {
        s1 = peg$c16;
        peg$currPos++;
      } else {
        s1 = peg$FAILED;
        if (peg$silentFails === 0) { peg$fail(peg$c17); }
      }
      if (s1 !== peg$FAILED) {
        s2 = [];
        s3 = peg$parse_();
        while (s3 !== peg$FAILED) {
          s2.push(s3);
          s3 = peg$parse_();
        }
        if (s2 !== peg$FAILED) {
          s3 = peg$parseaList();
          if (s3 === peg$FAILED) {
            s3 = null;
          }
          if (s3 !== peg$FAILED) {
            s4 = [];
            s5 = peg$parse_();
            while (s5 !== peg$FAILED) {
              s4.push(s5);
              s5 = peg$parse_();
            }
            if (s4 !== peg$FAILED) {
              if (input.charCodeAt(peg$currPos) === 93) {
                s5 = peg$c18;
                peg$currPos++;
              } else {
                s5 = peg$FAILED;
                if (peg$silentFails === 0) { peg$fail(peg$c19); }
              }
              if (s5 !== peg$FAILED) {
                s1 = peg$c20(s3);
                s0 = s1;
              } else {
                peg$currPos = s0;
                s0 = peg$FAILED;
              }
            } else {
              peg$currPos = s0;
              s0 = peg$FAILED;
            }
          } else {
            peg$currPos = s0;
            s0 = peg$FAILED;
          }
        } else {
          peg$currPos = s0;
          s0 = peg$FAILED;
        }
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }

      return s0;
    }

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

      s0 = peg$currPos;
      s1 = peg$parseidDef();
      if (s1 !== peg$FAILED) {
        s2 = [];
        s3 = peg$currPos;
        s4 = [];
        s5 = peg$parse_();
        while (s5 !== peg$FAILED) {
          s4.push(s5);
          s5 = peg$parse_();
        }
        if (s4 !== peg$FAILED) {
          if (input.charCodeAt(peg$currPos) === 44) {
            s5 = peg$c21;
            peg$currPos++;
          } else {
            s5 = peg$FAILED;
            if (peg$silentFails === 0) { peg$fail(peg$c22); }
          }
          if (s5 === peg$FAILED) {
            s5 = null;
          }
          if (s5 !== peg$FAILED) {
            s6 = [];
            s7 = peg$parse_();
            while (s7 !== peg$FAILED) {
              s6.push(s7);
              s7 = peg$parse_();
            }
            if (s6 !== peg$FAILED) {
              s7 = peg$parseidDef();
              if (s7 !== peg$FAILED) {
                s4 = [s4, s5, s6, s7];
                s3 = s4;
              } else {
                peg$currPos = s3;
                s3 = peg$FAILED;
              }
            } else {
              peg$currPos = s3;
              s3 = peg$FAILED;
            }
          } else {
            peg$currPos = s3;
            s3 = peg$FAILED;
          }
        } else {
          peg$currPos = s3;
          s3 = peg$FAILED;
        }
        while (s3 !== peg$FAILED) {
          s2.push(s3);
          s3 = peg$currPos;
          s4 = [];
          s5 = peg$parse_();
          while (s5 !== peg$FAILED) {
            s4.push(s5);
            s5 = peg$parse_();
          }
          if (s4 !== peg$FAILED) {
            if (input.charCodeAt(peg$currPos) === 44) {
              s5 = peg$c21;
              peg$currPos++;
            } else {
              s5 = peg$FAILED;
              if (peg$silentFails === 0) { peg$fail(peg$c22); }
            }
            if (s5 === peg$FAILED) {
              s5 = null;
            }
            if (s5 !== peg$FAILED) {
              s6 = [];
              s7 = peg$parse_();
              while (s7 !== peg$FAILED) {
                s6.push(s7);
                s7 = peg$parse_();
              }
              if (s6 !== peg$FAILED) {
                s7 = peg$parseidDef();
                if (s7 !== peg$FAILED) {
                  s4 = [s4, s5, s6, s7];
                  s3 = s4;
                } else {
                  peg$currPos = s3;
                  s3 = peg$FAILED;
                }
              } else {
                peg$currPos = s3;
                s3 = peg$FAILED;
              }
            } else {
              peg$currPos = s3;
              s3 = peg$FAILED;
            }
          } else {
            peg$currPos = s3;
            s3 = peg$FAILED;
          }
        }
        if (s2 !== peg$FAILED) {
          s1 = peg$c23(s1, s2);
          s0 = s1;
        } else {
          peg$currPos = s0;
          s0 = peg$FAILED;
        }
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }

      return s0;
    }

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

      s0 = peg$currPos;
      s1 = peg$currPos;
      if (input.substr(peg$currPos, 2) === peg$c24) {
        s2 = peg$c24;
        peg$currPos += 2;
      } else {
        s2 = peg$FAILED;
        if (peg$silentFails === 0) { peg$fail(peg$c25); }
      }
      if (s2 !== peg$FAILED) {
        s3 = peg$c26();
        if (s3) {
          s3 = peg$FAILED;
        } else {
          s3 = void 0;
        }
        if (s3 !== peg$FAILED) {
          s2 = [s2, s3];
          s1 = s2;
        } else {
          peg$currPos = s1;
          s1 = peg$FAILED;
        }
      } else {
        peg$currPos = s1;
        s1 = peg$FAILED;
      }
      if (s1 === peg$FAILED) {
        s1 = peg$currPos;
        if (input.substr(peg$currPos, 2) === peg$c27) {
          s2 = peg$c27;
          peg$currPos += 2;
        } else {
          s2 = peg$FAILED;
          if (peg$silentFails === 0) { peg$fail(peg$c28); }
        }
        if (s2 !== peg$FAILED) {
          s3 = peg$c26();
          if (s3) {
            s3 = void 0;
          } else {
            s3 = peg$FAILED;
          }
          if (s3 !== peg$FAILED) {
            s2 = [s2, s3];
            s1 = s2;
          } else {
            peg$currPos = s1;
            s1 = peg$FAILED;
          }
        } else {
          peg$currPos = s1;
          s1 = peg$FAILED;
        }
      }
      if (s1 !== peg$FAILED) {
        s2 = [];
        s3 = peg$parse_();
        while (s3 !== peg$FAILED) {
          s2.push(s3);
          s3 = peg$parse_();
        }
        if (s2 !== peg$FAILED) {
          s3 = peg$parsenodeIdOrSubgraph();
          if (s3 !== peg$FAILED) {
            s4 = [];
            s5 = peg$parse_();
            while (s5 !== peg$FAILED) {
              s4.push(s5);
              s5 = peg$parse_();
            }
            if (s4 !== peg$FAILED) {
              s5 = peg$parseedgeRHS();
              if (s5 === peg$FAILED) {
                s5 = null;
              }
              if (s5 !== peg$FAILED) {
                s1 = peg$c29(s3, s5);
                s0 = s1;
              } else {
                peg$currPos = s0;
                s0 = peg$FAILED;
              }
            } else {
              peg$currPos = s0;
              s0 = peg$FAILED;
            }
          } else {
            peg$currPos = s0;
            s0 = peg$FAILED;
          }
        } else {
          peg$currPos = s0;
          s0 = peg$FAILED;
        }
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }

      return s0;
    }

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

      s0 = peg$currPos;
      s1 = peg$parseid();
      if (s1 !== peg$FAILED) {
        s2 = peg$currPos;
        s3 = [];
        s4 = peg$parse_();
        while (s4 !== peg$FAILED) {
          s3.push(s4);
          s4 = peg$parse_();
        }
        if (s3 !== peg$FAILED) {
          if (input.charCodeAt(peg$currPos) === 61) {
            s4 = peg$c9;
            peg$currPos++;
          } else {
            s4 = peg$FAILED;
            if (peg$silentFails === 0) { peg$fail(peg$c10); }
          }
          if (s4 !== peg$FAILED) {
            s5 = [];
            s6 = peg$parse_();
            while (s6 !== peg$FAILED) {
              s5.push(s6);
              s6 = peg$parse_();
            }
            if (s5 !== peg$FAILED) {
              s6 = peg$parseid();
              if (s6 !== peg$FAILED) {
                s3 = [s3, s4, s5, s6];
                s2 = s3;
              } else {
                peg$currPos = s2;
                s2 = peg$FAILED;
              }
            } else {
              peg$currPos = s2;
              s2 = peg$FAILED;
            }
          } else {
            peg$currPos = s2;
            s2 = peg$FAILED;
          }
        } else {
          peg$currPos = s2;
          s2 = peg$FAILED;
        }
        if (s2 === peg$FAILED) {
          s2 = null;
        }
        if (s2 !== peg$FAILED) {
          s1 = peg$c30(s1, s2);
          s0 = s1;
        } else {
          peg$currPos = s0;
          s0 = peg$FAILED;
        }
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }

      return s0;
    }

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

      s0 = peg$parsesubgraphStmt();
      if (s0 === peg$FAILED) {
        s0 = peg$currPos;
        s1 = peg$parsenodeId();
        if (s1 !== peg$FAILED) {
          s1 = peg$c31(s1);
        }
        s0 = s1;
      }

      return s0;
    }

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

      s0 = peg$currPos;
      s1 = peg$parseid();
      if (s1 !== peg$FAILED) {
        s2 = [];
        s3 = peg$parse_();
        while (s3 !== peg$FAILED) {
          s2.push(s3);
          s3 = peg$parse_();
        }
        if (s2 !== peg$FAILED) {
          s3 = peg$parseport();
          if (s3 === peg$FAILED) {
            s3 = null;
          }
          if (s3 !== peg$FAILED) {
            s1 = peg$c32(s1);
            s0 = s1;
          } else {
            peg$currPos = s0;
            s0 = peg$FAILED;
          }
        } else {
          peg$currPos = s0;
          s0 = peg$FAILED;
        }
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }

      return s0;
    }

    function peg$parseport() {
      var s0, s1, s2, s3, s4, s5, s6, s7, s8;

      s0 = peg$currPos;
      if (input.charCodeAt(peg$currPos) === 58) {
        s1 = peg$c33;
        peg$currPos++;
      } else {
        s1 = peg$FAILED;
        if (peg$silentFails === 0) { peg$fail(peg$c34); }
      }
      if (s1 !== peg$FAILED) {
        s2 = [];
        s3 = peg$parse_();
        while (s3 !== peg$FAILED) {
          s2.push(s3);
          s3 = peg$parse_();
        }
        if (s2 !== peg$FAILED) {
          s3 = peg$parseid();
          if (s3 !== peg$FAILED) {
            s4 = [];
            s5 = peg$parse_();
            while (s5 !== peg$FAILED) {
              s4.push(s5);
              s5 = peg$parse_();
            }
            if (s4 !== peg$FAILED) {
              s5 = peg$currPos;
              if (input.charCodeAt(peg$currPos) === 58) {
                s6 = peg$c33;
                peg$currPos++;
              } else {
                s6 = peg$FAILED;
                if (peg$silentFails === 0) { peg$fail(peg$c34); }
              }
              if (s6 !== peg$FAILED) {
                s7 = [];
                s8 = peg$parse_();
                while (s8 !== peg$FAILED) {
                  s7.push(s8);
                  s8 = peg$parse_();
                }
                if (s7 !== peg$FAILED) {
                  s8 = peg$parsecompassPt();
                  if (s8 !== peg$FAILED) {
                    s6 = [s6, s7, s8];
                    s5 = s6;
                  } else {
                    peg$currPos = s5;
                    s5 = peg$FAILED;
                  }
                } else {
                  peg$currPos = s5;
                  s5 = peg$FAILED;
                }
              } else {
                peg$currPos = s5;
                s5 = peg$FAILED;
              }
              if (s5 === peg$FAILED) {
                s5 = null;
              }
              if (s5 !== peg$FAILED) {
                s1 = [s1, s2, s3, s4, s5];
                s0 = s1;
              } else {
                peg$currPos = s0;
                s0 = peg$FAILED;
              }
            } else {
              peg$currPos = s0;
              s0 = peg$FAILED;
            }
          } else {
            peg$currPos = s0;
            s0 = peg$FAILED;
          }
        } else {
          peg$currPos = s0;
          s0 = peg$FAILED;
        }
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }

      return s0;
    }

    function peg$parsecompassPt() {
      var s0;

      if (input.substr(peg$currPos, 2) === peg$c35) {
        s0 = peg$c35;
        peg$currPos += 2;
      } else {
        s0 = peg$FAILED;
        if (peg$silentFails === 0) { peg$fail(peg$c36); }
      }
      if (s0 === peg$FAILED) {
        if (input.substr(peg$currPos, 2) === peg$c37) {
          s0 = peg$c37;
          peg$currPos += 2;
        } else {
          s0 = peg$FAILED;
          if (peg$silentFails === 0) { peg$fail(peg$c38); }
        }
        if (s0 === peg$FAILED) {
          if (input.substr(peg$currPos, 2) === peg$c39) {
            s0 = peg$c39;
            peg$currPos += 2;
          } else {
            s0 = peg$FAILED;
            if (peg$silentFails === 0) { peg$fail(peg$c40); }
          }
          if (s0 === peg$FAILED) {
            if (input.substr(peg$currPos, 2) === peg$c41) {
              s0 = peg$c41;
              peg$currPos += 2;
            } else {
              s0 = peg$FAILED;
              if (peg$silentFails === 0) { peg$fail(peg$c42); }
            }
            if (s0 === peg$FAILED) {
              if (input.charCodeAt(peg$currPos) === 110) {
                s0 = peg$c43;
                peg$currPos++;
              } else {
                s0 = peg$FAILED;
                if (peg$silentFails === 0) { peg$fail(peg$c44); }
              }
              if (s0 === peg$FAILED) {
                if (input.charCodeAt(peg$currPos) === 101) {
                  s0 = peg$c45;
                  peg$currPos++;
                } else {
                  s0 = peg$FAILED;
                  if (peg$silentFails === 0) { peg$fail(peg$c46); }
                }
                if (s0 === peg$FAILED) {
                  if (input.charCodeAt(peg$currPos) === 115) {
                    s0 = peg$c47;
                    peg$currPos++;
                  } else {
                    s0 = peg$FAILED;
                    if (peg$silentFails === 0) { peg$fail(peg$c48); }
                  }
                  if (s0 === peg$FAILED) {
                    if (input.charCodeAt(peg$currPos) === 119) {
                      s0 = peg$c49;
                      peg$currPos++;
                    } else {
                      s0 = peg$FAILED;
                      if (peg$silentFails === 0) { peg$fail(peg$c50); }
                    }
                    if (s0 === peg$FAILED) {
                      if (input.charCodeAt(peg$currPos) === 99) {
                        s0 = peg$c51;
                        peg$currPos++;
                      } else {
                        s0 = peg$FAILED;
                        if (peg$silentFails === 0) { peg$fail(peg$c52); }
                      }
                      if (s0 === peg$FAILED) {
                        if (input.charCodeAt(peg$currPos) === 95) {
                          s0 = peg$c53;
                          peg$currPos++;
                        } else {
                          s0 = peg$FAILED;
                          if (peg$silentFails === 0) { peg$fail(peg$c54); }
                        }
                      }
                    }
                  }
                }
              }
            }
          }
        }
      }

      return s0;
    }

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

      peg$silentFails++;
      s0 = peg$currPos;
      if (peg$c56.test(input.charAt(peg$currPos))) {
        s1 = input.charAt(peg$currPos);
        peg$currPos++;
      } else {
        s1 = peg$FAILED;
        if (peg$silentFails === 0) { peg$fail(peg$c57); }
      }
      if (s1 !== peg$FAILED) {
        s2 = [];
        if (peg$c58.test(input.charAt(peg$currPos))) {
          s3 = input.charAt(peg$currPos);
          peg$currPos++;
        } else {
          s3 = peg$FAILED;
          if (peg$silentFails === 0) { peg$fail(peg$c59); }
        }
        while (s3 !== peg$FAILED) {
          s2.push(s3);
          if (peg$c58.test(input.charAt(peg$currPos))) {
            s3 = input.charAt(peg$currPos);
            peg$currPos++;
          } else {
            s3 = peg$FAILED;
            if (peg$silentFails === 0) { peg$fail(peg$c59); }
          }
        }
        if (s2 !== peg$FAILED) {
          s1 = peg$c60(s1, s2);
          s0 = s1;
        } else {
          peg$currPos = s0;
          s0 = peg$FAILED;
        }
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }
      if (s0 === peg$FAILED) {
        s0 = peg$currPos;
        if (input.charCodeAt(peg$currPos) === 45) {
          s1 = peg$c61;
          peg$currPos++;
        } else {
          s1 = peg$FAILED;
          if (peg$silentFails === 0) { peg$fail(peg$c62); }
        }
        if (s1 === peg$FAILED) {
          s1 = null;
        }
        if (s1 !== peg$FAILED) {
          if (input.charCodeAt(peg$currPos) === 46) {
            s2 = peg$c63;
            peg$currPos++;
          } else {
            s2 = peg$FAILED;
            if (peg$silentFails === 0) { peg$fail(peg$c64); }
          }
          if (s2 !== peg$FAILED) {
            s3 = [];
            if (peg$c65.test(input.charAt(peg$currPos))) {
              s4 = input.charAt(peg$currPos);
              peg$currPos++;
            } else {
              s4 = peg$FAILED;
              if (peg$silentFails === 0) { peg$fail(peg$c66); }
            }
            if (s4 !== peg$FAILED) {
              while (s4 !== peg$FAILED) {
                s3.push(s4);
                if (peg$c65.test(input.charAt(peg$currPos))) {
                  s4 = input.charAt(peg$currPos);
                  peg$currPos++;
                } else {
                  s4 = peg$FAILED;
                  if (peg$silentFails === 0) { peg$fail(peg$c66); }
                }
              }
            } else {
              s3 = peg$FAILED;
            }
            if (s3 !== peg$FAILED) {
              s1 = peg$c67(s1, s2, s3);
              s0 = s1;
            } else {
              peg$currPos = s0;
              s0 = peg$FAILED;
            }
          } else {
            peg$currPos = s0;
            s0 = peg$FAILED;
          }
        } else {
          peg$currPos = s0;
          s0 = peg$FAILED;
        }
        if (s0 === peg$FAILED) {
          s0 = peg$currPos;
          if (input.charCodeAt(peg$currPos) === 45) {
            s1 = peg$c61;
            peg$currPos++;
          } else {
            s1 = peg$FAILED;
            if (peg$silentFails === 0) { peg$fail(peg$c62); }
          }
          if (s1 === peg$FAILED) {
            s1 = null;
          }
          if (s1 !== peg$FAILED) {
            s2 = [];
            if (peg$c65.test(input.charAt(peg$currPos))) {
              s3 = input.charAt(peg$currPos);
              peg$currPos++;
            } else {
              s3 = peg$FAILED;
              if (peg$silentFails === 0) { peg$fail(peg$c66); }
            }
            if (s3 !== peg$FAILED) {
              while (s3 !== peg$FAILED) {
                s2.push(s3);
                if (peg$c65.test(input.charAt(peg$currPos))) {
                  s3 = input.charAt(peg$currPos);
                  peg$currPos++;
                } else {
                  s3 = peg$FAILED;
                  if (peg$silentFails === 0) { peg$fail(peg$c66); }
                }
              }
            } else {
              s2 = peg$FAILED;
            }
            if (s2 !== peg$FAILED) {
              s3 = peg$currPos;
              if (input.charCodeAt(peg$currPos) === 46) {
                s4 = peg$c63;
                peg$currPos++;
              } else {
                s4 = peg$FAILED;
                if (peg$silentFails === 0) { peg$fail(peg$c64); }
              }
              if (s4 !== peg$FAILED) {
                s5 = [];
                if (peg$c65.test(input.charAt(peg$currPos))) {
                  s6 = input.charAt(peg$currPos);
                  peg$currPos++;
                } else {
                  s6 = peg$FAILED;
                  if (peg$silentFails === 0) { peg$fail(peg$c66); }
                }
                while (s6 !== peg$FAILED) {
                  s5.push(s6);
                  if (peg$c65.test(input.charAt(peg$currPos))) {
                    s6 = input.charAt(peg$currPos);
                    peg$currPos++;
                  } else {
                    s6 = peg$FAILED;
                    if (peg$silentFails === 0) { peg$fail(peg$c66); }
                  }
                }
                if (s5 !== peg$FAILED) {
                  s4 = [s4, s5];
                  s3 = s4;
                } else {
                  peg$currPos = s3;
                  s3 = peg$FAILED;
                }
              } else {
                peg$currPos = s3;
                s3 = peg$FAILED;
              }
              if (s3 === peg$FAILED) {
                s3 = null;
              }
              if (s3 !== peg$FAILED) {
                s1 = peg$c68(s1, s2, s3);
                s0 = s1;
              } else {
                peg$currPos = s0;
                s0 = peg$FAILED;
              }
            } else {
              peg$currPos = s0;
              s0 = peg$FAILED;
            }
          } else {
            peg$currPos = s0;
            s0 = peg$FAILED;
          }
          if (s0 === peg$FAILED) {
            s0 = peg$currPos;
            if (input.charCodeAt(peg$currPos) === 34) {
              s1 = peg$c69;
              peg$currPos++;
            } else {
              s1 = peg$FAILED;
              if (peg$silentFails === 0) { peg$fail(peg$c70); }
            }
            if (s1 !== peg$FAILED) {
              s2 = [];
              s3 = peg$currPos;
              if (input.substr(peg$currPos, 2) === peg$c71) {
                s4 = peg$c71;
                peg$currPos += 2;
              } else {
                s4 = peg$FAILED;
                if (peg$silentFails === 0) { peg$fail(peg$c72); }
              }
              if (s4 !== peg$FAILED) {
                s4 = peg$c73();
              }
              s3 = s4;
              if (s3 === peg$FAILED) {
                s3 = peg$currPos;
                if (input.charCodeAt(peg$currPos) === 92) {
                  s4 = peg$c74;
                  peg$currPos++;
                } else {
                  s4 = peg$FAILED;
                  if (peg$silentFails === 0) { peg$fail(peg$c75); }
                }
                if (s4 !== peg$FAILED) {
                  if (peg$c76.test(input.charAt(peg$currPos))) {
                    s5 = input.charAt(peg$currPos);
                    peg$currPos++;
                  } else {
                    s5 = peg$FAILED;
                    if (peg$silentFails === 0) { peg$fail(peg$c77); }
                  }
                  if (s5 !== peg$FAILED) {
                    s4 = peg$c78(s5);
                    s3 = s4;
                  } else {
                    peg$currPos = s3;
                    s3 = peg$FAILED;
                  }
                } else {
                  peg$currPos = s3;
                  s3 = peg$FAILED;
                }
                if (s3 === peg$FAILED) {
                  if (peg$c76.test(input.charAt(peg$currPos))) {
                    s3 = input.charAt(peg$currPos);
                    peg$currPos++;
                  } else {
                    s3 = peg$FAILED;
                    if (peg$silentFails === 0) { peg$fail(peg$c77); }
                  }
                }
              }
              while (s3 !== peg$FAILED) {
                s2.push(s3);
                s3 = peg$currPos;
                if (input.substr(peg$currPos, 2) === peg$c71) {
                  s4 = peg$c71;
                  peg$currPos += 2;
                } else {
                  s4 = peg$FAILED;
                  if (peg$silentFails === 0) { peg$fail(peg$c72); }
                }
                if (s4 !== peg$FAILED) {
                  s4 = peg$c73();
                }
                s3 = s4;
                if (s3 === peg$FAILED) {
                  s3 = peg$currPos;
                  if (input.charCodeAt(peg$currPos) === 92) {
                    s4 = peg$c74;
                    peg$currPos++;
                  } else {
                    s4 = peg$FAILED;
                    if (peg$silentFails === 0) { peg$fail(peg$c75); }
                  }
                  if (s4 !== peg$FAILED) {
                    if (peg$c76.test(input.charAt(peg$currPos))) {
                      s5 = input.charAt(peg$currPos);
                      peg$currPos++;
                    } else {
                      s5 = peg$FAILED;
                      if (peg$silentFails === 0) { peg$fail(peg$c77); }
                    }
                    if (s5 !== peg$FAILED) {
                      s4 = peg$c78(s5);
                      s3 = s4;
                    } else {
                      peg$currPos = s3;
                      s3 = peg$FAILED;
                    }
                  } else {
                    peg$currPos = s3;
                    s3 = peg$FAILED;
                  }
                  if (s3 === peg$FAILED) {
                    if (peg$c76.test(input.charAt(peg$currPos))) {
                      s3 = input.charAt(peg$currPos);
                      peg$currPos++;
                    } else {
                      s3 = peg$FAILED;
                      if (peg$silentFails === 0) { peg$fail(peg$c77); }
                    }
                  }
                }
              }
              if (s2 !== peg$FAILED) {
                if (input.charCodeAt(peg$currPos) === 34) {
                  s3 = peg$c69;
                  peg$currPos++;
                } else {
                  s3 = peg$FAILED;
                  if (peg$silentFails === 0) { peg$fail(peg$c70); }
                }
                if (s3 !== peg$FAILED) {
                  s1 = peg$c79(s2);
                  s0 = s1;
                } else {
                  peg$currPos = s0;
                  s0 = peg$FAILED;
                }
              } else {
                peg$currPos = s0;
                s0 = peg$FAILED;
              }
            } else {
              peg$currPos = s0;
              s0 = peg$FAILED;
            }
          }
        }
      }
      peg$silentFails--;
      if (s0 === peg$FAILED) {
        s1 = peg$FAILED;
        if (peg$silentFails === 0) { peg$fail(peg$c55); }
      }

      return s0;
    }

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

      s0 = peg$currPos;
      if (input.substr(peg$currPos, 4).toLowerCase() === peg$c80) {
        s1 = input.substr(peg$currPos, 4);
        peg$currPos += 4;
      } else {
        s1 = peg$FAILED;
        if (peg$silentFails === 0) { peg$fail(peg$c81); }
      }
      if (s1 !== peg$FAILED) {
        s1 = peg$c82(s1);
      }
      s0 = s1;

      return s0;
    }

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

      s0 = peg$currPos;
      if (input.substr(peg$currPos, 4).toLowerCase() === peg$c83) {
        s1 = input.substr(peg$currPos, 4);
        peg$currPos += 4;
      } else {
        s1 = peg$FAILED;
        if (peg$silentFails === 0) { peg$fail(peg$c84); }
      }
      if (s1 !== peg$FAILED) {
        s1 = peg$c82(s1);
      }
      s0 = s1;

      return s0;
    }

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

      s0 = peg$currPos;
      if (input.substr(peg$currPos, 5).toLowerCase() === peg$c85) {
        s1 = input.substr(peg$currPos, 5);
        peg$currPos += 5;
      } else {
        s1 = peg$FAILED;
        if (peg$silentFails === 0) { peg$fail(peg$c86); }
      }
      if (s1 !== peg$FAILED) {
        s1 = peg$c82(s1);
      }
      s0 = s1;

      return s0;
    }

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

      s0 = peg$currPos;
      if (input.substr(peg$currPos, 7).toLowerCase() === peg$c87) {
        s1 = input.substr(peg$currPos, 7);
        peg$currPos += 7;
      } else {
        s1 = peg$FAILED;
        if (peg$silentFails === 0) { peg$fail(peg$c88); }
      }
      if (s1 !== peg$FAILED) {
        s1 = peg$c82(s1);
      }
      s0 = s1;

      return s0;
    }

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

      s0 = peg$currPos;
      if (input.substr(peg$currPos, 8).toLowerCase() === peg$c89) {
        s1 = input.substr(peg$currPos, 8);
        peg$currPos += 8;
      } else {
        s1 = peg$FAILED;
        if (peg$silentFails === 0) { peg$fail(peg$c90); }
      }
      if (s1 !== peg$FAILED) {
        s1 = peg$c82(s1);
      }
      s0 = s1;

      return s0;
    }

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

      s0 = peg$currPos;
      if (input.substr(peg$currPos, 6).toLowerCase() === peg$c91) {
        s1 = input.substr(peg$currPos, 6);
        peg$currPos += 6;
      } else {
        s1 = peg$FAILED;
        if (peg$silentFails === 0) { peg$fail(peg$c92); }
      }
      if (s1 !== peg$FAILED) {
        s1 = peg$c82(s1);
      }
      s0 = s1;

      return s0;
    }

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

      s0 = peg$parsegraph();
      if (s0 === peg$FAILED) {
        s0 = peg$currPos;
        s1 = peg$parsedigraph();
        if (s1 !== peg$FAILED) {
          s1 = peg$c93(s1);
        }
        s0 = s1;
      }

      return s0;
    }

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

      peg$silentFails++;
      s0 = [];
      if (peg$c95.test(input.charAt(peg$currPos))) {
        s1 = input.charAt(peg$currPos);
        peg$currPos++;
      } else {
        s1 = peg$FAILED;
        if (peg$silentFails === 0) { peg$fail(peg$c96); }
      }
      if (s1 !== peg$FAILED) {
        while (s1 !== peg$FAILED) {
          s0.push(s1);
          if (peg$c95.test(input.charAt(peg$currPos))) {
            s1 = input.charAt(peg$currPos);
            peg$currPos++;
          } else {
            s1 = peg$FAILED;
            if (peg$silentFails === 0) { peg$fail(peg$c96); }
          }
        }
      } else {
        s0 = peg$FAILED;
      }
      peg$silentFails--;
      if (s0 === peg$FAILED) {
        s1 = peg$FAILED;
        if (peg$silentFails === 0) { peg$fail(peg$c94); }
      }

      return s0;
    }

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

      peg$silentFails++;
      s0 = peg$currPos;
      if (input.substr(peg$currPos, 2) === peg$c98) {
        s1 = peg$c98;
        peg$currPos += 2;
      } else {
        s1 = peg$FAILED;
        if (peg$silentFails === 0) { peg$fail(peg$c99); }
      }
      if (s1 !== peg$FAILED) {
        s2 = [];
        if (peg$c100.test(input.charAt(peg$currPos))) {
          s3 = input.charAt(peg$currPos);
          peg$currPos++;
        } else {
          s3 = peg$FAILED;
          if (peg$silentFails === 0) { peg$fail(peg$c101); }
        }
        while (s3 !== peg$FAILED) {
          s2.push(s3);
          if (peg$c100.test(input.charAt(peg$currPos))) {
            s3 = input.charAt(peg$currPos);
            peg$currPos++;
          } else {
            s3 = peg$FAILED;
            if (peg$silentFails === 0) { peg$fail(peg$c101); }
          }
        }
        if (s2 !== peg$FAILED) {
          s1 = [s1, s2];
          s0 = s1;
        } else {
          peg$currPos = s0;
          s0 = peg$FAILED;
        }
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }
      if (s0 === peg$FAILED) {
        s0 = peg$currPos;
        if (input.substr(peg$currPos, 2) === peg$c102) {
          s1 = peg$c102;
          peg$currPos += 2;
        } else {
          s1 = peg$FAILED;
          if (peg$silentFails === 0) { peg$fail(peg$c103); }
        }
        if (s1 !== peg$FAILED) {
          s2 = [];
          s3 = peg$currPos;
          s4 = peg$currPos;
          peg$silentFails++;
          if (input.substr(peg$currPos, 2) === peg$c104) {
            s5 = peg$c104;
            peg$currPos += 2;
          } else {
            s5 = peg$FAILED;
            if (peg$silentFails === 0) { peg$fail(peg$c105); }
          }
          peg$silentFails--;
          if (s5 === peg$FAILED) {
            s4 = void 0;
          } else {
            peg$currPos = s4;
            s4 = peg$FAILED;
          }
          if (s4 !== peg$FAILED) {
            if (input.length > peg$currPos) {
              s5 = input.charAt(peg$currPos);
              peg$currPos++;
            } else {
              s5 = peg$FAILED;
              if (peg$silentFails === 0) { peg$fail(peg$c106); }
            }
            if (s5 !== peg$FAILED) {
              s4 = [s4, s5];
              s3 = s4;
            } else {
              peg$currPos = s3;
              s3 = peg$FAILED;
            }
          } else {
            peg$currPos = s3;
            s3 = peg$FAILED;
          }
          while (s3 !== peg$FAILED) {
            s2.push(s3);
            s3 = peg$currPos;
            s4 = peg$currPos;
            peg$silentFails++;
            if (input.substr(peg$currPos, 2) === peg$c104) {
              s5 = peg$c104;
              peg$currPos += 2;
            } else {
              s5 = peg$FAILED;
              if (peg$silentFails === 0) { peg$fail(peg$c105); }
            }
            peg$silentFails--;
            if (s5 === peg$FAILED) {
              s4 = void 0;
            } else {
              peg$currPos = s4;
              s4 = peg$FAILED;
            }
            if (s4 !== peg$FAILED) {
              if (input.length > peg$currPos) {
                s5 = input.charAt(peg$currPos);
                peg$currPos++;
              } else {
                s5 = peg$FAILED;
                if (peg$silentFails === 0) { peg$fail(peg$c106); }
              }
              if (s5 !== peg$FAILED) {
                s4 = [s4, s5];
                s3 = s4;
              } else {
                peg$currPos = s3;
                s3 = peg$FAILED;
              }
            } else {
              peg$currPos = s3;
              s3 = peg$FAILED;
            }
          }
          if (s2 !== peg$FAILED) {
            if (input.substr(peg$currPos, 2) === peg$c104) {
              s3 = peg$c104;
              peg$currPos += 2;
            } else {
              s3 = peg$FAILED;
              if (peg$silentFails === 0) { peg$fail(peg$c105); }
            }
            if (s3 !== peg$FAILED) {
              s1 = [s1, s2, s3];
              s0 = s1;
            } else {
              peg$currPos = s0;
              s0 = peg$FAILED;
            }
          } else {
            peg$currPos = s0;
            s0 = peg$FAILED;
          }
        } else {
          peg$currPos = s0;
          s0 = peg$FAILED;
        }
      }
      peg$silentFails--;
      if (s0 === peg$FAILED) {
        s1 = peg$FAILED;
        if (peg$silentFails === 0) { peg$fail(peg$c97); }
      }

      return s0;
    }

    function peg$parse_() {
      var s0;

      s0 = peg$parsewhitespace();
      if (s0 === peg$FAILED) {
        s0 = peg$parsecomment();
      }

      return s0;
    }


      function merge(a, b, key) {

        function x(a) {
            a.forEach(function (b) {
                if (!(b[key] in obj)) {
                    obj[b[key]] = obj[b[key]] || {};
                    array.push(obj[b[key]]);
                }
                Object.keys(b).forEach(function (k) {
                    obj[b[key]][k] = b[k];
                });
            });
        }

        var array = [],
            obj = {};

        x(a);
        x(b);
        return array;
      }

      var directed;


    peg$result = peg$startRuleFunction();

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

      throw peg$buildStructuredError(
        peg$maxFailExpected,
        peg$maxFailPos < input.length ? input.charAt(peg$maxFailPos) : null,
        peg$maxFailPos < input.length
          ? peg$computeLocation(peg$maxFailPos, peg$maxFailPos + 1)
          : peg$computeLocation(peg$maxFailPos, peg$maxFailPos)
      );
    }
  }

  root.d3dotparser1 = {
    SyntaxError: peg$SyntaxError,
    parse:       peg$parse
  };
})(window);

'use strict';

const dotparser = d3dotparser1;

var load = function(url, converter, callback) {
      if (arguments.length < 3) callback = converter, converter = simple;
      var r = d3
          .request(url)
          .mimeType("text/vnd.graphviz")
          .response(function(xhr) {
            return converter(dotparser.parse(xhr.responseText)); });
      return callback ? r.get(callback) : r;
  };

  function simple(dotgraph) {

    let nodeMap = {};
    function addNode(node) {
      if (nodeMap[node.id]) return;
      nodeMap[node.id] = node;
    }

    if (dotgraph.length===0) return null;
    let fgraph = dotgraph[0];

    fgraph.stmts.filter((s) => s.type === "node" ).forEach(addNode);
    let edges = fgraph.stmts.filter((s) => s.type === "edge" );
    let links = [];
    for(let i=0; i<edges.length; i++) {
      let edge = edges[i];
      for(let j=0; j<edge.elems.length-1; j++) {
        let curr = edge.elems[j];
        let next = edge.elems[j+1];
        let link = Object.assign({source:curr.id, target:next.id}, edge.attrs);
        links.push(link);
        addNode(curr);
        addNode(next);
      }
    }

    let nodes  = Object.values(nodeMap).map( (n) => Object.assign({id:n.id}, n.attrs));
    return {
      nodes,
      links
    };
  }

'use strict';

d3.dot = load;

})));