simponic.xyz/godel/js/parser.js

parser = /*
 * Generated by PEG.js 0.10.0.
 *
 * http://pegjs.org/
 */
(function() {
  "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$startRuleFunctions = { Program: peg$parseProgram },
        peg$startRuleFunction  = peg$parseProgram,

        peg$c0 = /^[\n]/,
        peg$c1 = peg$classExpectation(["\n"], false, false),
        peg$c2 = function(lines) {
          return { instructions: lines.filter((line) => typeof line !== "string" || line.trim() != "") };
        },
        peg$c3 = function(instruction) {
          let x = 0;
          let y = 0;
          if (instruction.label) {
            x = instruction.label.godel;
            y = instruction.instruction.godel;
          } else {
            y = instruction.godel;
          }
          return { instruction, godel: ((2 ** x) * ((2 * y) + 1) - 1) };
        },
        peg$c4 = function(label, instruction) {
          return { label, instruction };
        },
        peg$c5 = "[",
        peg$c6 = peg$literalExpectation("[", false),
        peg$c7 = "]",
        peg$c8 = peg$literalExpectation("]", false),
        peg$c9 = function(label) {
          return label;
        },
        peg$c10 = function(conditional) { return { conditional, godel: conditional.godel }; },
        peg$c11 = function(assignment) { return { assignment, godel: assignment.godel }; },
        peg$c12 = function(goto) { return { goto, godel: goto.godel }; },
        peg$c13 = function(label) {
          return { label, godel: label.godel + 2 };
        },
        peg$c14 = "IF",
        peg$c15 = peg$literalExpectation("IF", false),
        peg$c16 = "!=",
        peg$c17 = peg$literalExpectation("!=", false),
        peg$c18 = "0",
        peg$c19 = peg$literalExpectation("0", false),
        peg$c20 = function(variable, goto) {
          const y = variable.godel - 1;
          const x = goto.godel;
          return { variable, goto, godel: ((2 ** x) * ((2 * y) + 1) - 1) };
        },
        peg$c21 = "<-",
        peg$c22 = peg$literalExpectation("<-", false),
        peg$c23 = function(variable, expr) {
          if (expr.left.symbol != variable.symbol) {
            error("left hand variable must match right hand");
          }
          const x = expr.instructionNumber;
          const y = variable.godel - 1;
          return { variable, expr, godel: ((2 ** x) * ((2 * y) + 1) - 1) };
        },
        peg$c24 = "1",
        peg$c25 = peg$literalExpectation("1", false),
        peg$c26 = function(left, opr) {
          const instructionNumber = { "+" : 1, "-" : 2 }[opr];
          return { left, opr, instructionNumber };
        },
        peg$c27 = function(left) {
          return { left, instructionNumber: 0 };
        },
        peg$c28 = "Y",
        peg$c29 = peg$literalExpectation("Y", false),
        peg$c30 = function(symbol) { return { symbol, godel: 1 }; },
        peg$c31 = "X",
        peg$c32 = peg$literalExpectation("X", false),
        peg$c33 = "Z",
        peg$c34 = peg$literalExpectation("Z", false),
        peg$c35 = function(symbol, ind) {
          const index = parseInt(ind);
          const order = ["X", "Z"];
          const godel = index * order.length + order.indexOf(symbol);
          return { symbol: symbol + ind, godel };
        },
        peg$c36 = "GOTO",
        peg$c37 = peg$literalExpectation("GOTO", false),
        peg$c38 = "+",
        peg$c39 = peg$literalExpectation("+", false),
        peg$c40 = "-",
        peg$c41 = peg$literalExpectation("-", false),
        peg$c42 = /^[A-E]/,
        peg$c43 = peg$classExpectation([["A", "E"]], false, false),
        peg$c44 = function(symbol, ind) {
          const index = parseInt(ind);
          const godel = (symbol.charCodeAt(0) - "A".charCodeAt(0) + 1) + 5*(index-1);
          return { symbol: symbol + ind, godel };
        },
        peg$c45 = peg$otherExpectation("integer"),
        peg$c46 = /^[0-9]/,
        peg$c47 = peg$classExpectation([["0", "9"]], false, false),
        peg$c48 = function() { return parseInt(text(), 10); },
        peg$c49 = peg$otherExpectation("whitespace"),
        peg$c50 = /^[ \t]/,
        peg$c51 = peg$classExpectation([" ", "\t"], false, false),
        peg$c52 = function() {  },

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

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

    function expected(description, location) {
      location = location !== void 0 ? location : peg$computeLocation(peg$savedPos, peg$currPos)

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

    function error(message, location) {
      location = location !== void 0 ? location : peg$computeLocation(peg$savedPos, peg$currPos)

      throw peg$buildSimpleError(message, location);
    }

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

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

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

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

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

    function peg$computePosDetails(pos) {
      var details = peg$posDetailsCache[pos], 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$buildSimpleError(message, location) {
      return new peg$SyntaxError(message, null, null, location);
    }

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

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

      s0 = peg$currPos;
      s1 = [];
      s2 = peg$parseProgramInstruction();
      if (s2 === peg$FAILED) {
        s2 = peg$parse_();
        if (s2 === peg$FAILED) {
          if (peg$c0.test(input.charAt(peg$currPos))) {
            s2 = input.charAt(peg$currPos);
            peg$currPos++;
          } else {
            s2 = peg$FAILED;
            if (peg$silentFails === 0) { peg$fail(peg$c1); }
          }
        }
      }
      while (s2 !== peg$FAILED) {
        s1.push(s2);
        s2 = peg$parseProgramInstruction();
        if (s2 === peg$FAILED) {
          s2 = peg$parse_();
          if (s2 === peg$FAILED) {
            if (peg$c0.test(input.charAt(peg$currPos))) {
              s2 = input.charAt(peg$currPos);
              peg$currPos++;
            } else {
              s2 = peg$FAILED;
              if (peg$silentFails === 0) { peg$fail(peg$c1); }
            }
          }
        }
      }
      if (s1 !== peg$FAILED) {
        peg$savedPos = s0;
        s1 = peg$c2(s1);
      }
      s0 = s1;

      return s0;
    }

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

      s0 = peg$currPos;
      s1 = peg$parse_();
      if (s1 === peg$FAILED) {
        s1 = null;
      }
      if (s1 !== peg$FAILED) {
        s2 = peg$parseLabeledInstruction();
        if (s2 === peg$FAILED) {
          s2 = peg$parseInstruction();
        }
        if (s2 !== peg$FAILED) {
          s3 = peg$parse_();
          if (s3 === peg$FAILED) {
            s3 = null;
          }
          if (s3 !== peg$FAILED) {
            if (peg$c0.test(input.charAt(peg$currPos))) {
              s4 = input.charAt(peg$currPos);
              peg$currPos++;
            } else {
              s4 = peg$FAILED;
              if (peg$silentFails === 0) { peg$fail(peg$c1); }
            }
            if (s4 === peg$FAILED) {
              s4 = null;
            }
            if (s4 !== peg$FAILED) {
              peg$savedPos = s0;
              s1 = peg$c3(s2);
              s0 = s1;
            } else {
              peg$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$parseLabeledInstruction() {
      var s0, s1, s2, s3;

      s0 = peg$currPos;
      s1 = peg$parseLabel();
      if (s1 !== peg$FAILED) {
        s2 = peg$parse_();
        if (s2 !== peg$FAILED) {
          s3 = peg$parseInstruction();
          if (s3 !== peg$FAILED) {
            peg$savedPos = s0;
            s1 = peg$c4(s1, s3);
            s0 = s1;
          } else {
            peg$currPos = s0;
            s0 = peg$FAILED;
          }
        } else {
          peg$currPos = s0;
          s0 = peg$FAILED;
        }
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }

      return s0;
    }

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

      s0 = peg$currPos;
      if (input.charCodeAt(peg$currPos) === 91) {
        s1 = peg$c5;
        peg$currPos++;
      } else {
        s1 = peg$FAILED;
        if (peg$silentFails === 0) { peg$fail(peg$c6); }
      }
      if (s1 !== peg$FAILED) {
        s2 = peg$parse_();
        if (s2 === peg$FAILED) {
          s2 = null;
        }
        if (s2 !== peg$FAILED) {
          s3 = peg$parseLABEL_V();
          if (s3 !== peg$FAILED) {
            s4 = peg$parse_();
            if (s4 === peg$FAILED) {
              s4 = null;
            }
            if (s4 !== peg$FAILED) {
              if (input.charCodeAt(peg$currPos) === 93) {
                s5 = peg$c7;
                peg$currPos++;
              } else {
                s5 = peg$FAILED;
                if (peg$silentFails === 0) { peg$fail(peg$c8); }
              }
              if (s5 !== peg$FAILED) {
                peg$savedPos = s0;
                s1 = peg$c9(s3);
                s0 = s1;
              } else {
                peg$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$parseInstruction() {
      var s0, s1;

      s0 = peg$currPos;
      s1 = peg$parseConditional();
      if (s1 !== peg$FAILED) {
        peg$savedPos = s0;
        s1 = peg$c10(s1);
      }
      s0 = s1;
      if (s0 === peg$FAILED) {
        s0 = peg$currPos;
        s1 = peg$parseAssignment();
        if (s1 !== peg$FAILED) {
          peg$savedPos = s0;
          s1 = peg$c11(s1);
        }
        s0 = s1;
        if (s0 === peg$FAILED) {
          s0 = peg$currPos;
          s1 = peg$parseGoto();
          if (s1 !== peg$FAILED) {
            peg$savedPos = s0;
            s1 = peg$c12(s1);
          }
          s0 = s1;
        }
      }

      return s0;
    }

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

      s0 = peg$currPos;
      s1 = peg$parseGOTO();
      if (s1 !== peg$FAILED) {
        s2 = peg$parse_();
        if (s2 !== peg$FAILED) {
          s3 = peg$parseLABEL_V();
          if (s3 !== peg$FAILED) {
            peg$savedPos = s0;
            s1 = peg$c13(s3);
            s0 = s1;
          } else {
            peg$currPos = s0;
            s0 = peg$FAILED;
          }
        } else {
          peg$currPos = s0;
          s0 = peg$FAILED;
        }
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }

      return s0;
    }

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

      s0 = peg$currPos;
      if (input.substr(peg$currPos, 2) === peg$c14) {
        s1 = peg$c14;
        peg$currPos += 2;
      } else {
        s1 = peg$FAILED;
        if (peg$silentFails === 0) { peg$fail(peg$c15); }
      }
      if (s1 !== peg$FAILED) {
        s2 = peg$parse_();
        if (s2 !== peg$FAILED) {
          s3 = peg$parseVAR();
          if (s3 !== peg$FAILED) {
            s4 = peg$parse_();
            if (s4 === peg$FAILED) {
              s4 = null;
            }
            if (s4 !== peg$FAILED) {
              if (input.substr(peg$currPos, 2) === peg$c16) {
                s5 = peg$c16;
                peg$currPos += 2;
              } else {
                s5 = peg$FAILED;
                if (peg$silentFails === 0) { peg$fail(peg$c17); }
              }
              if (s5 !== peg$FAILED) {
                s6 = peg$parse_();
                if (s6 === peg$FAILED) {
                  s6 = null;
                }
                if (s6 !== peg$FAILED) {
                  if (input.charCodeAt(peg$currPos) === 48) {
                    s7 = peg$c18;
                    peg$currPos++;
                  } else {
                    s7 = peg$FAILED;
                    if (peg$silentFails === 0) { peg$fail(peg$c19); }
                  }
                  if (s7 !== peg$FAILED) {
                    s8 = peg$parse_();
                    if (s8 !== peg$FAILED) {
                      s9 = peg$parseGoto();
                      if (s9 !== peg$FAILED) {
                        peg$savedPos = s0;
                        s1 = peg$c20(s3, s9);
                        s0 = s1;
                      } else {
                        peg$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;
      }

      return s0;
    }

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

      s0 = peg$currPos;
      s1 = peg$parseVAR();
      if (s1 !== peg$FAILED) {
        s2 = peg$parse_();
        if (s2 !== peg$FAILED) {
          if (input.substr(peg$currPos, 2) === peg$c21) {
            s3 = peg$c21;
            peg$currPos += 2;
          } else {
            s3 = peg$FAILED;
            if (peg$silentFails === 0) { peg$fail(peg$c22); }
          }
          if (s3 !== peg$FAILED) {
            s4 = peg$parse_();
            if (s4 !== peg$FAILED) {
              s5 = peg$parseExpression();
              if (s5 !== peg$FAILED) {
                peg$savedPos = s0;
                s1 = peg$c23(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$parseExpression() {
      var s0, s1, s2, s3, s4, s5;

      s0 = peg$currPos;
      s1 = peg$parseVAR();
      if (s1 !== peg$FAILED) {
        s2 = peg$parse_();
        if (s2 !== peg$FAILED) {
          s3 = peg$parseOPERATION();
          if (s3 !== peg$FAILED) {
            s4 = peg$parse_();
            if (s4 !== peg$FAILED) {
              if (input.charCodeAt(peg$currPos) === 49) {
                s5 = peg$c24;
                peg$currPos++;
              } else {
                s5 = peg$FAILED;
                if (peg$silentFails === 0) { peg$fail(peg$c25); }
              }
              if (s5 !== peg$FAILED) {
                peg$savedPos = s0;
                s1 = peg$c26(s1, s3);
                s0 = s1;
              } else {
                peg$currPos = s0;
                s0 = peg$FAILED;
              }
            } else {
              peg$currPos = s0;
              s0 = peg$FAILED;
            }
          } else {
            peg$currPos = s0;
            s0 = peg$FAILED;
          }
        } else {
          peg$currPos = s0;
          s0 = peg$FAILED;
        }
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }
      if (s0 === peg$FAILED) {
        s0 = peg$currPos;
        s1 = peg$parseVAR();
        if (s1 !== peg$FAILED) {
          peg$savedPos = s0;
          s1 = peg$c27(s1);
        }
        s0 = s1;
      }

      return s0;
    }

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

      s0 = peg$currPos;
      if (input.charCodeAt(peg$currPos) === 89) {
        s1 = peg$c28;
        peg$currPos++;
      } else {
        s1 = peg$FAILED;
        if (peg$silentFails === 0) { peg$fail(peg$c29); }
      }
      if (s1 !== peg$FAILED) {
        peg$savedPos = s0;
        s1 = peg$c30(s1);
      }
      s0 = s1;
      if (s0 === peg$FAILED) {
        s0 = peg$currPos;
        if (input.charCodeAt(peg$currPos) === 88) {
          s1 = peg$c31;
          peg$currPos++;
        } else {
          s1 = peg$FAILED;
          if (peg$silentFails === 0) { peg$fail(peg$c32); }
        }
        if (s1 === peg$FAILED) {
          if (input.charCodeAt(peg$currPos) === 90) {
            s1 = peg$c33;
            peg$currPos++;
          } else {
            s1 = peg$FAILED;
            if (peg$silentFails === 0) { peg$fail(peg$c34); }
          }
        }
        if (s1 !== peg$FAILED) {
          s2 = [];
          s3 = peg$parseInteger();
          if (s3 !== peg$FAILED) {
            while (s3 !== peg$FAILED) {
              s2.push(s3);
              s3 = peg$parseInteger();
            }
          } else {
            s2 = peg$FAILED;
          }
          if (s2 !== peg$FAILED) {
            peg$savedPos = s0;
            s1 = peg$c35(s1, s2);
            s0 = s1;
          } else {
            peg$currPos = s0;
            s0 = peg$FAILED;
          }
        } else {
          peg$currPos = s0;
          s0 = peg$FAILED;
        }
      }

      return s0;
    }

    function peg$parseGOTO() {
      var s0;

      if (input.substr(peg$currPos, 4) === peg$c36) {
        s0 = peg$c36;
        peg$currPos += 4;
      } else {
        s0 = peg$FAILED;
        if (peg$silentFails === 0) { peg$fail(peg$c37); }
      }

      return s0;
    }

    function peg$parseOPERATION() {
      var s0;

      if (input.charCodeAt(peg$currPos) === 43) {
        s0 = peg$c38;
        peg$currPos++;
      } else {
        s0 = peg$FAILED;
        if (peg$silentFails === 0) { peg$fail(peg$c39); }
      }
      if (s0 === peg$FAILED) {
        if (input.charCodeAt(peg$currPos) === 45) {
          s0 = peg$c40;
          peg$currPos++;
        } else {
          s0 = peg$FAILED;
          if (peg$silentFails === 0) { peg$fail(peg$c41); }
        }
      }

      return s0;
    }

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

      s0 = peg$currPos;
      if (peg$c42.test(input.charAt(peg$currPos))) {
        s1 = input.charAt(peg$currPos);
        peg$currPos++;
      } else {
        s1 = peg$FAILED;
        if (peg$silentFails === 0) { peg$fail(peg$c43); }
      }
      if (s1 !== peg$FAILED) {
        s2 = [];
        s3 = peg$parseInteger();
        if (s3 !== peg$FAILED) {
          while (s3 !== peg$FAILED) {
            s2.push(s3);
            s3 = peg$parseInteger();
          }
        } else {
          s2 = peg$FAILED;
        }
        if (s2 !== peg$FAILED) {
          peg$savedPos = s0;
          s1 = peg$c44(s1, s2);
          s0 = s1;
        } else {
          peg$currPos = s0;
          s0 = peg$FAILED;
        }
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }

      return s0;
    }

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

      peg$silentFails++;
      s0 = peg$currPos;
      s1 = [];
      if (peg$c46.test(input.charAt(peg$currPos))) {
        s2 = input.charAt(peg$currPos);
        peg$currPos++;
      } else {
        s2 = peg$FAILED;
        if (peg$silentFails === 0) { peg$fail(peg$c47); }
      }
      if (s2 !== peg$FAILED) {
        while (s2 !== peg$FAILED) {
          s1.push(s2);
          if (peg$c46.test(input.charAt(peg$currPos))) {
            s2 = input.charAt(peg$currPos);
            peg$currPos++;
          } else {
            s2 = peg$FAILED;
            if (peg$silentFails === 0) { peg$fail(peg$c47); }
          }
        }
      } else {
        s1 = peg$FAILED;
      }
      if (s1 !== peg$FAILED) {
        peg$savedPos = s0;
        s1 = peg$c48();
      }
      s0 = s1;
      peg$silentFails--;
      if (s0 === peg$FAILED) {
        s1 = peg$FAILED;
        if (peg$silentFails === 0) { peg$fail(peg$c45); }
      }

      return s0;
    }

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

      peg$silentFails++;
      s0 = peg$currPos;
      s1 = [];
      if (peg$c50.test(input.charAt(peg$currPos))) {
        s2 = input.charAt(peg$currPos);
        peg$currPos++;
      } else {
        s2 = peg$FAILED;
        if (peg$silentFails === 0) { peg$fail(peg$c51); }
      }
      if (s2 !== peg$FAILED) {
        while (s2 !== peg$FAILED) {
          s1.push(s2);
          if (peg$c50.test(input.charAt(peg$currPos))) {
            s2 = input.charAt(peg$currPos);
            peg$currPos++;
          } else {
            s2 = peg$FAILED;
            if (peg$silentFails === 0) { peg$fail(peg$c51); }
          }
        }
      } else {
        s1 = peg$FAILED;
      }
      if (s1 !== peg$FAILED) {
        peg$savedPos = s0;
        s1 = peg$c52();
      }
      s0 = s1;
      peg$silentFails--;
      if (s0 === peg$FAILED) {
        s1 = peg$FAILED;
        if (peg$silentFails === 0) { peg$fail(peg$c49); }
      }

      return s0;
    }

    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)
      );
    }
  }

  return {
    SyntaxError: peg$SyntaxError,
    parse:       peg$parse
  };
})();