// Generated by Peggy 1.2.0.
//
// https://peggyjs.org/

"use strict";

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

function peg$SyntaxError(message, expected, found, location) {
  var self = Error.call(this, message);
  if (Object.setPrototypeOf) {
    Object.setPrototypeOf(self, peg$SyntaxError.prototype);
  }
  self.expected = expected;
  self.found = found;
  self.location = location;
  self.name = "SyntaxError";
  return self;
}

peg$subclass(peg$SyntaxError, Error);

function peg$padEnd(str, targetLength, padString) {
  padString = padString || " ";
  if (str.length > targetLength) { return str; }
  targetLength -= str.length;
  padString += padString.repeat(targetLength);
  return str + padString.slice(0, targetLength);
}

peg$SyntaxError.prototype.format = function(sources) {
  var str = "Error: " + this.message;
  if (this.location) {
    var src = null;
    var k;
    for (k = 0; k < sources.length; k++) {
      if (sources[k].source === this.location.source) {
        src = sources[k].text.split(/\r\n|\n|\r/g);
        break;
      }
    }
    var s = this.location.start;
    var loc = this.location.source + ":" + s.line + ":" + s.column;
    if (src) {
      var e = this.location.end;
      var filler = peg$padEnd("", s.line.toString().length);
      var line = src[s.line - 1];
      var last = s.line === e.line ? e.column : line.length + 1;
      str += "\n --> " + loc + "\n"
          + filler + " |\n"
          + s.line + " | " + line + "\n"
          + filler + " | " + peg$padEnd("", s.column - 1)
          + peg$padEnd("", last - s.column, "^");
    } else {
      str += "\n at " + loc;
    }
  }
  return str;
};

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

    class: function(expectation) {
      var escapedParts = expectation.parts.map(function(part) {
        return Array.isArray(part)
          ? classEscape(part[0]) + "-" + classEscape(part[1])
          : classEscape(part);
      });

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

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

    end: function() {
      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 = expected.map(describeExpectation);
    var i, j;

    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 !== undefined ? options : {};

  var peg$FAILED = {};
  var peg$source = options.grammarSource;

  var peg$startRuleFunctions = { start: peg$parsestart };
  var peg$startRuleFunction = peg$parsestart;

  var peg$c0 = ",";
  var peg$c1 = "=";
  var peg$c2 = "$";
  var peg$c3 = ".";
  var peg$c4 = "(";
  var peg$c5 = ")";
  var peg$c6 = "@";
  var peg$c7 = ":";
  var peg$c8 = "\"";
  var peg$c9 = "'";
  var peg$c10 = "true";
  var peg$c11 = "false";
  var peg$c12 = "null";
  var peg$c13 = "\\";

  var peg$r0 = /^[a-zA-Z]/;
  var peg$r1 = /^[.a-zA-Z0-9_\-]/;
  var peg$r2 = /^[^()"',= \t]/;
  var peg$r3 = /^[ \t\r\n]/;
  var peg$r4 = /^[^"]/;
  var peg$r5 = /^[^']/;
  var peg$r6 = /^[0-9]/;

  var peg$e0 = peg$literalExpectation(",", false);
  var peg$e1 = peg$literalExpectation("=", false);
  var peg$e2 = peg$literalExpectation("$", false);
  var peg$e3 = peg$classExpectation([["a", "z"], ["A", "Z"]], false, false);
  var peg$e4 = peg$classExpectation([".", ["a", "z"], ["A", "Z"], ["0", "9"], "_", "-"], false, false);
  var peg$e5 = peg$otherExpectation("function");
  var peg$e6 = peg$literalExpectation(".", false);
  var peg$e7 = peg$literalExpectation("(", false);
  var peg$e8 = peg$literalExpectation(")", false);
  var peg$e9 = peg$literalExpectation("@", false);
  var peg$e10 = peg$literalExpectation(":", false);
  var peg$e11 = peg$otherExpectation("literal");
  var peg$e12 = peg$literalExpectation("\"", false);
  var peg$e13 = peg$literalExpectation("'", false);
  var peg$e14 = peg$literalExpectation("true", false);
  var peg$e15 = peg$literalExpectation("false", false);
  var peg$e16 = peg$literalExpectation("null", false);
  var peg$e17 = peg$classExpectation(["(", ")", "\"", "'", ",", "=", " ", "\t"], true, false);
  var peg$e18 = peg$classExpectation([" ", "\t", "\r", "\n"], false, false);
  var peg$e19 = peg$literalExpectation("\\", false);
  var peg$e20 = peg$classExpectation(["\""], true, false);
  var peg$e21 = peg$classExpectation(["'"], true, false);
  var peg$e22 = peg$classExpectation([["0", "9"]], false, false);

  var peg$f0 = function(tree) {
    return {
      tree: tree.filter(function (o) {return o != null}),
      functions: functions,
      args: args,
      variables: variables
    }
   };
  var peg$f1 = function(first, arg) {return arg};
  var peg$f2 = function(first, rest) {
    return [first].concat(rest);
   };
  var peg$f3 = function(name, value) {
    var arg = {
     type: 'namedArg',
     name: name,
     value: value,
     location: simpleLocation(location()),
     text: text()
    };
    currentArgs.push(arg);
    return arg;
   };
  var peg$f4 = function(value) {
    var exception = {
     type: 'incompleteArgument',
     currentArgs: currentArgs,
     currentFunction: currentFunction,
     location: simpleLocation(location()),
     text: text()
    }
    error(JSON.stringify(exception));
   };
  var peg$f5 = function(name) {
    var exception = {
     type: 'incompleteArgumentValue',
     currentArgs: currentArgs,
     currentFunction: currentFunction,
     name: name,
     location: simpleLocation(location()),
     text: text()
    }
    error(JSON.stringify(exception));
   };
  var peg$f6 = function(element) {return element};
  var peg$f7 = function(literal) {
    var result = ltoo(literal);
    result.location = simpleLocation(location()),
    result.text = text();
    return result;
   };
  var peg$f8 = function(name) {
    if (variables[name]) {
     return variables[name];
    } else {
     error('$' + name + ' is not defined')
    }
   };
  var peg$f9 = function(name, value) {
    variables[name] = value;
   };
  var peg$f10 = function(first, series) {return series};
  var peg$f11 = function(first, rest) {
    return [first].concat(rest)
   };
  var peg$f12 = function(first, rest) {
    currentFunction = first.join('') + rest.join('');
    currentArgs = [];
    return currentFunction;
  };
  var peg$f13 = function(first, rest) { return first.join('') + rest.join('') };
  var peg$f14 = function(name, arg_list) {
    var result = {
      type: 'function',
      function: name,
      arguments: arg_list || [],
      location: simpleLocation(location()),
      text: text()
    }

    result.arguments.forEach(function (arg) {
     arg.function = name;
     args.push(arg);
    })

    functions.push(result)
    return result;
   };
  var peg$f15 = function(func) {
    var exception = {
     type: 'incompleteFunction',
     function: func,
     location: simpleLocation(location()),
     text: text()
    }
    error(JSON.stringify(exception));
   };
  var peg$f16 = function(plot, series) {
    return {
     type: 'reference',
     plot: plot,
     series: series
    }
   };
  var peg$f17 = function(plot) {
    return {
     type: 'reference',
     plot: plot
    }
   };
  var peg$f18 = function(func, rest) {return {type: 'chain', chain: [func].concat(rest)}};
  var peg$f19 = function(grouped, functions) {
    var first = {
      type: 'chainList',
      list: grouped
    }
    first.label = text();

    return {type: "chain", chain: [first].concat(functions)};
   };
  var peg$f20 = function(chars) { return chars.join(''); };
  var peg$f21 = function() { return true; };
  var peg$f22 = function() { return false; };
  var peg$f23 = function() { return null; };
  var peg$f24 = function(string) { // this also matches numbers via Number()
     var result = string.join('');
     // Sort of hacky, but PEG doesn't have backtracking so
     // a number rule is hard to read, and performs worse
     if (isNaN(Number(result))) return result;
     return Number(result)
    };
  var peg$f25 = function(sequence) { return sequence; };
  var peg$f26 = function(digits) {return parseInt(digits.join(''))};

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

  var 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 offset() {
    return peg$savedPos;
  }

  function range() {
    return {
      source: peg$source,
      start: peg$savedPos,
      end: peg$currPos
    };
  }

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

  function expected(description, location) {
    location = location !== undefined
      ? 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 !== undefined
      ? 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];
    var 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);
    var endPosDetails = peg$computePosDetails(endPos);

    return {
      source: peg$source,
      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$parsestart() {
    var s0, s1, s2;

    s0 = peg$currPos;
    s1 = peg$parsespace();
    if (s1 === peg$FAILED) {
      s1 = null;
    }
    s2 = peg$parseseries();
    if (s2 !== peg$FAILED) {
      peg$savedPos = s0;
      s0 = peg$f0(s2);
    } else {
      peg$currPos = s0;
      s0 = peg$FAILED;
    }

    return s0;
  }

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

    s0 = peg$currPos;
    s1 = peg$parseargument();
    if (s1 !== peg$FAILED) {
      s2 = [];
      s3 = peg$currPos;
      s4 = peg$parsespace();
      if (s4 === peg$FAILED) {
        s4 = null;
      }
      if (input.charCodeAt(peg$currPos) === 44) {
        s5 = peg$c0;
        peg$currPos++;
      } else {
        s5 = peg$FAILED;
        if (peg$silentFails === 0) { peg$fail(peg$e0); }
      }
      if (s5 !== peg$FAILED) {
        s6 = peg$parsespace();
        if (s6 === peg$FAILED) {
          s6 = null;
        }
        s7 = peg$parseargument();
        if (s7 !== peg$FAILED) {
          peg$savedPos = s3;
          s3 = peg$f1(s1, s7);
        } 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$parsespace();
        if (s4 === peg$FAILED) {
          s4 = null;
        }
        if (input.charCodeAt(peg$currPos) === 44) {
          s5 = peg$c0;
          peg$currPos++;
        } else {
          s5 = peg$FAILED;
          if (peg$silentFails === 0) { peg$fail(peg$e0); }
        }
        if (s5 !== peg$FAILED) {
          s6 = peg$parsespace();
          if (s6 === peg$FAILED) {
            s6 = null;
          }
          s7 = peg$parseargument();
          if (s7 !== peg$FAILED) {
            peg$savedPos = s3;
            s3 = peg$f1(s1, s7);
          } else {
            peg$currPos = s3;
            s3 = peg$FAILED;
          }
        } else {
          peg$currPos = s3;
          s3 = peg$FAILED;
        }
      }
      s3 = peg$parsespace();
      if (s3 === peg$FAILED) {
        s3 = null;
      }
      if (input.charCodeAt(peg$currPos) === 44) {
        s4 = peg$c0;
        peg$currPos++;
      } else {
        s4 = peg$FAILED;
        if (peg$silentFails === 0) { peg$fail(peg$e0); }
      }
      if (s4 === peg$FAILED) {
        s4 = null;
      }
      peg$savedPos = s0;
      s0 = peg$f2(s1, s2);
    } else {
      peg$currPos = s0;
      s0 = peg$FAILED;
    }

    return s0;
  }

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

    s0 = peg$currPos;
    s1 = peg$parseargument_name();
    if (s1 !== peg$FAILED) {
      s2 = peg$parsespace();
      if (s2 === peg$FAILED) {
        s2 = null;
      }
      if (input.charCodeAt(peg$currPos) === 61) {
        s3 = peg$c1;
        peg$currPos++;
      } else {
        s3 = peg$FAILED;
        if (peg$silentFails === 0) { peg$fail(peg$e1); }
      }
      if (s3 !== peg$FAILED) {
        s4 = peg$parsespace();
        if (s4 === peg$FAILED) {
          s4 = null;
        }
        s5 = peg$parsearg_type();
        if (s5 !== peg$FAILED) {
          peg$savedPos = s0;
          s0 = peg$f3(s1, s5);
        } else {
          peg$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$currPos;
      s1 = peg$parsespace();
      if (s1 === peg$FAILED) {
        s1 = null;
      }
      if (input.charCodeAt(peg$currPos) === 61) {
        s2 = peg$c1;
        peg$currPos++;
      } else {
        s2 = peg$FAILED;
        if (peg$silentFails === 0) { peg$fail(peg$e1); }
      }
      if (s2 !== peg$FAILED) {
        s3 = peg$parsespace();
        if (s3 === peg$FAILED) {
          s3 = null;
        }
        s4 = peg$parsearg_type();
        if (s4 === peg$FAILED) {
          s4 = null;
        }
        peg$savedPos = s0;
        s0 = peg$f4(s4);
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }
      if (s0 === peg$FAILED) {
        s0 = peg$currPos;
        s1 = peg$parseargument_name();
        if (s1 !== peg$FAILED) {
          s2 = peg$parsespace();
          if (s2 === peg$FAILED) {
            s2 = null;
          }
          if (input.charCodeAt(peg$currPos) === 61) {
            s3 = peg$c1;
            peg$currPos++;
          } else {
            s3 = peg$FAILED;
            if (peg$silentFails === 0) { peg$fail(peg$e1); }
          }
          if (s3 !== peg$FAILED) {
            peg$savedPos = s0;
            s0 = peg$f5(s1);
          } else {
            peg$currPos = s0;
            s0 = peg$FAILED;
          }
        } else {
          peg$currPos = s0;
          s0 = peg$FAILED;
        }
        if (s0 === peg$FAILED) {
          s0 = peg$currPos;
          s1 = peg$parsearg_type();
          if (s1 !== peg$FAILED) {
            peg$savedPos = s0;
            s1 = peg$f6(s1);
          }
          s0 = s1;
        }
      }
    }

    return s0;
  }

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

    s0 = peg$parsevariable_get();
    if (s0 === peg$FAILED) {
      s0 = peg$parseseries_type();
      if (s0 === peg$FAILED) {
        s0 = peg$currPos;
        s1 = peg$parseliteral();
        if (s1 !== peg$FAILED) {
          peg$savedPos = s0;
          s1 = peg$f7(s1);
        }
        s0 = s1;
      }
    }

    return s0;
  }

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

    s0 = peg$currPos;
    if (input.charCodeAt(peg$currPos) === 36) {
      s1 = peg$c2;
      peg$currPos++;
    } else {
      s1 = peg$FAILED;
      if (peg$silentFails === 0) { peg$fail(peg$e2); }
    }
    if (s1 !== peg$FAILED) {
      s2 = peg$parseargument_name();
      if (s2 !== peg$FAILED) {
        peg$savedPos = s0;
        s0 = peg$f8(s2);
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }
    } else {
      peg$currPos = s0;
      s0 = peg$FAILED;
    }

    return s0;
  }

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

    s0 = peg$currPos;
    if (input.charCodeAt(peg$currPos) === 36) {
      s1 = peg$c2;
      peg$currPos++;
    } else {
      s1 = peg$FAILED;
      if (peg$silentFails === 0) { peg$fail(peg$e2); }
    }
    if (s1 !== peg$FAILED) {
      s2 = peg$parseargument_name();
      if (s2 !== peg$FAILED) {
        s3 = peg$parsespace();
        if (s3 === peg$FAILED) {
          s3 = null;
        }
        if (input.charCodeAt(peg$currPos) === 61) {
          s4 = peg$c1;
          peg$currPos++;
        } else {
          s4 = peg$FAILED;
          if (peg$silentFails === 0) { peg$fail(peg$e1); }
        }
        if (s4 !== peg$FAILED) {
          s5 = peg$parsespace();
          if (s5 === peg$FAILED) {
            s5 = null;
          }
          s6 = peg$parsearg_type();
          if (s6 !== peg$FAILED) {
            peg$savedPos = s0;
            s0 = peg$f9(s2, s6);
          } else {
            peg$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$parseseries_type() {
    var s0;

    s0 = peg$parsevariable_set();
    if (s0 === peg$FAILED) {
      s0 = peg$parsevariable_get();
      if (s0 === peg$FAILED) {
        s0 = peg$parsegroup();
        if (s0 === peg$FAILED) {
          s0 = peg$parsechain();
          if (s0 === peg$FAILED) {
            s0 = peg$parsereference();
          }
        }
      }
    }

    return s0;
  }

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

    s0 = peg$currPos;
    s1 = peg$parseseries_type();
    if (s1 !== peg$FAILED) {
      s2 = [];
      s3 = peg$currPos;
      s4 = peg$parsespace();
      if (s4 === peg$FAILED) {
        s4 = null;
      }
      if (input.charCodeAt(peg$currPos) === 44) {
        s5 = peg$c0;
        peg$currPos++;
      } else {
        s5 = peg$FAILED;
        if (peg$silentFails === 0) { peg$fail(peg$e0); }
      }
      if (s5 !== peg$FAILED) {
        s6 = peg$parsespace();
        if (s6 === peg$FAILED) {
          s6 = null;
        }
        s7 = peg$parseseries_type();
        if (s7 !== peg$FAILED) {
          peg$savedPos = s3;
          s3 = peg$f10(s1, s7);
        } 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$parsespace();
        if (s4 === peg$FAILED) {
          s4 = null;
        }
        if (input.charCodeAt(peg$currPos) === 44) {
          s5 = peg$c0;
          peg$currPos++;
        } else {
          s5 = peg$FAILED;
          if (peg$silentFails === 0) { peg$fail(peg$e0); }
        }
        if (s5 !== peg$FAILED) {
          s6 = peg$parsespace();
          if (s6 === peg$FAILED) {
            s6 = null;
          }
          s7 = peg$parseseries_type();
          if (s7 !== peg$FAILED) {
            peg$savedPos = s3;
            s3 = peg$f10(s1, s7);
          } else {
            peg$currPos = s3;
            s3 = peg$FAILED;
          }
        } else {
          peg$currPos = s3;
          s3 = peg$FAILED;
        }
      }
      if (input.charCodeAt(peg$currPos) === 44) {
        s3 = peg$c0;
        peg$currPos++;
      } else {
        s3 = peg$FAILED;
        if (peg$silentFails === 0) { peg$fail(peg$e0); }
      }
      if (s3 === peg$FAILED) {
        s3 = null;
      }
      peg$savedPos = s0;
      s0 = peg$f11(s1, s2);
    } else {
      peg$currPos = s0;
      s0 = peg$FAILED;
    }

    return s0;
  }

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

    s0 = peg$currPos;
    s1 = [];
    if (peg$r0.test(input.charAt(peg$currPos))) {
      s2 = input.charAt(peg$currPos);
      peg$currPos++;
    } else {
      s2 = peg$FAILED;
      if (peg$silentFails === 0) { peg$fail(peg$e3); }
    }
    if (s2 !== peg$FAILED) {
      while (s2 !== peg$FAILED) {
        s1.push(s2);
        if (peg$r0.test(input.charAt(peg$currPos))) {
          s2 = input.charAt(peg$currPos);
          peg$currPos++;
        } else {
          s2 = peg$FAILED;
          if (peg$silentFails === 0) { peg$fail(peg$e3); }
        }
      }
    } else {
      s1 = peg$FAILED;
    }
    if (s1 !== peg$FAILED) {
      s2 = [];
      if (peg$r1.test(input.charAt(peg$currPos))) {
        s3 = input.charAt(peg$currPos);
        peg$currPos++;
      } else {
        s3 = peg$FAILED;
        if (peg$silentFails === 0) { peg$fail(peg$e4); }
      }
      while (s3 !== peg$FAILED) {
        s2.push(s3);
        if (peg$r1.test(input.charAt(peg$currPos))) {
          s3 = input.charAt(peg$currPos);
          peg$currPos++;
        } else {
          s3 = peg$FAILED;
          if (peg$silentFails === 0) { peg$fail(peg$e4); }
        }
      }
      peg$savedPos = s0;
      s0 = peg$f12(s1, s2);
    } else {
      peg$currPos = s0;
      s0 = peg$FAILED;
    }

    return s0;
  }

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

    s0 = peg$currPos;
    s1 = [];
    if (peg$r0.test(input.charAt(peg$currPos))) {
      s2 = input.charAt(peg$currPos);
      peg$currPos++;
    } else {
      s2 = peg$FAILED;
      if (peg$silentFails === 0) { peg$fail(peg$e3); }
    }
    if (s2 !== peg$FAILED) {
      while (s2 !== peg$FAILED) {
        s1.push(s2);
        if (peg$r0.test(input.charAt(peg$currPos))) {
          s2 = input.charAt(peg$currPos);
          peg$currPos++;
        } else {
          s2 = peg$FAILED;
          if (peg$silentFails === 0) { peg$fail(peg$e3); }
        }
      }
    } else {
      s1 = peg$FAILED;
    }
    if (s1 !== peg$FAILED) {
      s2 = [];
      if (peg$r1.test(input.charAt(peg$currPos))) {
        s3 = input.charAt(peg$currPos);
        peg$currPos++;
      } else {
        s3 = peg$FAILED;
        if (peg$silentFails === 0) { peg$fail(peg$e4); }
      }
      while (s3 !== peg$FAILED) {
        s2.push(s3);
        if (peg$r1.test(input.charAt(peg$currPos))) {
          s3 = input.charAt(peg$currPos);
          peg$currPos++;
        } else {
          s3 = peg$FAILED;
          if (peg$silentFails === 0) { peg$fail(peg$e4); }
        }
      }
      peg$savedPos = s0;
      s0 = peg$f13(s1, s2);
    } else {
      peg$currPos = s0;
      s0 = peg$FAILED;
    }

    return s0;
  }

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

    peg$silentFails++;
    s0 = peg$currPos;
    s1 = peg$parsespace();
    if (s1 === peg$FAILED) {
      s1 = null;
    }
    if (input.charCodeAt(peg$currPos) === 46) {
      s2 = peg$c3;
      peg$currPos++;
    } else {
      s2 = peg$FAILED;
      if (peg$silentFails === 0) { peg$fail(peg$e6); }
    }
    if (s2 !== peg$FAILED) {
      s3 = peg$parsefunction_name();
      if (s3 !== peg$FAILED) {
        s4 = peg$parsespace();
        if (s4 === peg$FAILED) {
          s4 = null;
        }
        if (input.charCodeAt(peg$currPos) === 40) {
          s5 = peg$c4;
          peg$currPos++;
        } else {
          s5 = peg$FAILED;
          if (peg$silentFails === 0) { peg$fail(peg$e7); }
        }
        if (s5 !== peg$FAILED) {
          s6 = peg$parsespace();
          if (s6 === peg$FAILED) {
            s6 = null;
          }
          s7 = peg$parsearg_list();
          if (s7 === peg$FAILED) {
            s7 = null;
          }
          s8 = peg$parsespace();
          if (s8 === peg$FAILED) {
            s8 = null;
          }
          if (input.charCodeAt(peg$currPos) === 41) {
            s9 = peg$c5;
            peg$currPos++;
          } else {
            s9 = peg$FAILED;
            if (peg$silentFails === 0) { peg$fail(peg$e8); }
          }
          if (s9 !== peg$FAILED) {
            s10 = peg$parsespace();
            if (s10 === peg$FAILED) {
              s10 = null;
            }
            peg$savedPos = s0;
            s0 = peg$f14(s3, s7);
          } 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;
      if (input.charCodeAt(peg$currPos) === 46) {
        s1 = peg$c3;
        peg$currPos++;
      } else {
        s1 = peg$FAILED;
        if (peg$silentFails === 0) { peg$fail(peg$e6); }
      }
      if (s1 !== peg$FAILED) {
        s2 = peg$parsefunction_name();
        if (s2 === peg$FAILED) {
          s2 = null;
        }
        peg$savedPos = s0;
        s0 = peg$f15(s2);
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }
    }
    peg$silentFails--;
    if (s0 === peg$FAILED) {
      s1 = peg$FAILED;
      if (peg$silentFails === 0) { peg$fail(peg$e5); }
    }

    return s0;
  }

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

    s0 = peg$currPos;
    if (input.charCodeAt(peg$currPos) === 64) {
      s1 = peg$c6;
      peg$currPos++;
    } else {
      s1 = peg$FAILED;
      if (peg$silentFails === 0) { peg$fail(peg$e9); }
    }
    if (s1 !== peg$FAILED) {
      s2 = peg$parseinteger();
      if (s2 !== peg$FAILED) {
        if (input.charCodeAt(peg$currPos) === 58) {
          s3 = peg$c7;
          peg$currPos++;
        } else {
          s3 = peg$FAILED;
          if (peg$silentFails === 0) { peg$fail(peg$e10); }
        }
        if (s3 !== peg$FAILED) {
          s4 = peg$parseinteger();
          if (s4 !== peg$FAILED) {
            peg$savedPos = s0;
            s0 = peg$f16(s2, s4);
          } else {
            peg$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$currPos;
      if (input.charCodeAt(peg$currPos) === 64) {
        s1 = peg$c6;
        peg$currPos++;
      } else {
        s1 = peg$FAILED;
        if (peg$silentFails === 0) { peg$fail(peg$e9); }
      }
      if (s1 !== peg$FAILED) {
        s2 = peg$parseinteger();
        if (s2 !== peg$FAILED) {
          peg$savedPos = s0;
          s0 = peg$f17(s2);
        } else {
          peg$currPos = s0;
          s0 = peg$FAILED;
        }
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }
    }

    return s0;
  }

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

    s0 = peg$currPos;
    s1 = peg$parsefunction();
    if (s1 !== peg$FAILED) {
      s2 = peg$parsespace();
      if (s2 === peg$FAILED) {
        s2 = null;
      }
      s3 = [];
      s4 = peg$parsefunction();
      while (s4 !== peg$FAILED) {
        s3.push(s4);
        s4 = peg$parsefunction();
      }
      peg$savedPos = s0;
      s0 = peg$f18(s1, s3);
    } else {
      peg$currPos = s0;
      s0 = peg$FAILED;
    }

    return s0;
  }

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

    s0 = peg$currPos;
    if (input.charCodeAt(peg$currPos) === 40) {
      s1 = peg$c4;
      peg$currPos++;
    } else {
      s1 = peg$FAILED;
      if (peg$silentFails === 0) { peg$fail(peg$e7); }
    }
    if (s1 !== peg$FAILED) {
      s2 = peg$parsespace();
      if (s2 === peg$FAILED) {
        s2 = null;
      }
      s3 = peg$parseseries();
      if (s3 !== peg$FAILED) {
        s4 = peg$parsespace();
        if (s4 === peg$FAILED) {
          s4 = null;
        }
        if (input.charCodeAt(peg$currPos) === 41) {
          s5 = peg$c5;
          peg$currPos++;
        } else {
          s5 = peg$FAILED;
          if (peg$silentFails === 0) { peg$fail(peg$e8); }
        }
        if (s5 !== peg$FAILED) {
          s6 = [];
          s7 = peg$parsefunction();
          while (s7 !== peg$FAILED) {
            s6.push(s7);
            s7 = peg$parsefunction();
          }
          peg$savedPos = s0;
          s0 = peg$f19(s3, s6);
        } 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$parseliteral() {
    var s0, s1, s2, s3;

    peg$silentFails++;
    s0 = peg$currPos;
    if (input.charCodeAt(peg$currPos) === 34) {
      s1 = peg$c8;
      peg$currPos++;
    } else {
      s1 = peg$FAILED;
      if (peg$silentFails === 0) { peg$fail(peg$e12); }
    }
    if (s1 !== peg$FAILED) {
      s2 = [];
      s3 = peg$parsedq_char();
      while (s3 !== peg$FAILED) {
        s2.push(s3);
        s3 = peg$parsedq_char();
      }
      if (input.charCodeAt(peg$currPos) === 34) {
        s3 = peg$c8;
        peg$currPos++;
      } else {
        s3 = peg$FAILED;
        if (peg$silentFails === 0) { peg$fail(peg$e12); }
      }
      if (s3 !== peg$FAILED) {
        peg$savedPos = s0;
        s0 = peg$f20(s2);
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }
    } else {
      peg$currPos = s0;
      s0 = peg$FAILED;
    }
    if (s0 === peg$FAILED) {
      s0 = peg$currPos;
      if (input.charCodeAt(peg$currPos) === 39) {
        s1 = peg$c9;
        peg$currPos++;
      } else {
        s1 = peg$FAILED;
        if (peg$silentFails === 0) { peg$fail(peg$e13); }
      }
      if (s1 !== peg$FAILED) {
        s2 = [];
        s3 = peg$parsesq_char();
        while (s3 !== peg$FAILED) {
          s2.push(s3);
          s3 = peg$parsesq_char();
        }
        if (input.charCodeAt(peg$currPos) === 39) {
          s3 = peg$c9;
          peg$currPos++;
        } else {
          s3 = peg$FAILED;
          if (peg$silentFails === 0) { peg$fail(peg$e13); }
        }
        if (s3 !== peg$FAILED) {
          peg$savedPos = s0;
          s0 = peg$f20(s2);
        } 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$currPos, 4) === peg$c10) {
          s1 = peg$c10;
          peg$currPos += 4;
        } else {
          s1 = peg$FAILED;
          if (peg$silentFails === 0) { peg$fail(peg$e14); }
        }
        if (s1 !== peg$FAILED) {
          peg$savedPos = s0;
          s1 = peg$f21();
        }
        s0 = s1;
        if (s0 === peg$FAILED) {
          s0 = peg$currPos;
          if (input.substr(peg$currPos, 5) === peg$c11) {
            s1 = peg$c11;
            peg$currPos += 5;
          } else {
            s1 = peg$FAILED;
            if (peg$silentFails === 0) { peg$fail(peg$e15); }
          }
          if (s1 !== peg$FAILED) {
            peg$savedPos = s0;
            s1 = peg$f22();
          }
          s0 = s1;
          if (s0 === peg$FAILED) {
            s0 = peg$currPos;
            if (input.substr(peg$currPos, 4) === peg$c12) {
              s1 = peg$c12;
              peg$currPos += 4;
            } else {
              s1 = peg$FAILED;
              if (peg$silentFails === 0) { peg$fail(peg$e16); }
            }
            if (s1 !== peg$FAILED) {
              peg$savedPos = s0;
              s1 = peg$f23();
            }
            s0 = s1;
            if (s0 === peg$FAILED) {
              s0 = peg$currPos;
              s1 = [];
              if (peg$r2.test(input.charAt(peg$currPos))) {
                s2 = input.charAt(peg$currPos);
                peg$currPos++;
              } else {
                s2 = peg$FAILED;
                if (peg$silentFails === 0) { peg$fail(peg$e17); }
              }
              if (s2 !== peg$FAILED) {
                while (s2 !== peg$FAILED) {
                  s1.push(s2);
                  if (peg$r2.test(input.charAt(peg$currPos))) {
                    s2 = input.charAt(peg$currPos);
                    peg$currPos++;
                  } else {
                    s2 = peg$FAILED;
                    if (peg$silentFails === 0) { peg$fail(peg$e17); }
                  }
                }
              } else {
                s1 = peg$FAILED;
              }
              if (s1 !== peg$FAILED) {
                peg$savedPos = s0;
                s1 = peg$f24(s1);
              }
              s0 = s1;
            }
          }
        }
      }
    }
    peg$silentFails--;
    if (s0 === peg$FAILED) {
      s1 = peg$FAILED;
      if (peg$silentFails === 0) { peg$fail(peg$e11); }
    }

    return s0;
  }

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

    s0 = [];
    if (peg$r3.test(input.charAt(peg$currPos))) {
      s1 = input.charAt(peg$currPos);
      peg$currPos++;
    } else {
      s1 = peg$FAILED;
      if (peg$silentFails === 0) { peg$fail(peg$e18); }
    }
    if (s1 !== peg$FAILED) {
      while (s1 !== peg$FAILED) {
        s0.push(s1);
        if (peg$r3.test(input.charAt(peg$currPos))) {
          s1 = input.charAt(peg$currPos);
          peg$currPos++;
        } else {
          s1 = peg$FAILED;
          if (peg$silentFails === 0) { peg$fail(peg$e18); }
        }
      }
    } else {
      s0 = peg$FAILED;
    }

    return s0;
  }

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

    s0 = peg$currPos;
    if (input.charCodeAt(peg$currPos) === 92) {
      s1 = peg$c13;
      peg$currPos++;
    } else {
      s1 = peg$FAILED;
      if (peg$silentFails === 0) { peg$fail(peg$e19); }
    }
    if (s1 !== peg$FAILED) {
      if (input.charCodeAt(peg$currPos) === 34) {
        s2 = peg$c8;
        peg$currPos++;
      } else {
        s2 = peg$FAILED;
        if (peg$silentFails === 0) { peg$fail(peg$e12); }
      }
      if (s2 === peg$FAILED) {
        if (input.charCodeAt(peg$currPos) === 92) {
          s2 = peg$c13;
          peg$currPos++;
        } else {
          s2 = peg$FAILED;
          if (peg$silentFails === 0) { peg$fail(peg$e19); }
        }
      }
      if (s2 !== peg$FAILED) {
        peg$savedPos = s0;
        s0 = peg$f25(s2);
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }
    } else {
      peg$currPos = s0;
      s0 = peg$FAILED;
    }
    if (s0 === peg$FAILED) {
      if (peg$r4.test(input.charAt(peg$currPos))) {
        s0 = input.charAt(peg$currPos);
        peg$currPos++;
      } else {
        s0 = peg$FAILED;
        if (peg$silentFails === 0) { peg$fail(peg$e20); }
      }
    }

    return s0;
  }

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

    s0 = peg$currPos;
    if (input.charCodeAt(peg$currPos) === 92) {
      s1 = peg$c13;
      peg$currPos++;
    } else {
      s1 = peg$FAILED;
      if (peg$silentFails === 0) { peg$fail(peg$e19); }
    }
    if (s1 !== peg$FAILED) {
      if (input.charCodeAt(peg$currPos) === 39) {
        s2 = peg$c9;
        peg$currPos++;
      } else {
        s2 = peg$FAILED;
        if (peg$silentFails === 0) { peg$fail(peg$e13); }
      }
      if (s2 === peg$FAILED) {
        if (input.charCodeAt(peg$currPos) === 92) {
          s2 = peg$c13;
          peg$currPos++;
        } else {
          s2 = peg$FAILED;
          if (peg$silentFails === 0) { peg$fail(peg$e19); }
        }
      }
      if (s2 !== peg$FAILED) {
        peg$savedPos = s0;
        s0 = peg$f25(s2);
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }
    } else {
      peg$currPos = s0;
      s0 = peg$FAILED;
    }
    if (s0 === peg$FAILED) {
      if (peg$r5.test(input.charAt(peg$currPos))) {
        s0 = input.charAt(peg$currPos);
        peg$currPos++;
      } else {
        s0 = peg$FAILED;
        if (peg$silentFails === 0) { peg$fail(peg$e21); }
      }
    }

    return s0;
  }

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

    s0 = peg$currPos;
    s1 = [];
    if (peg$r6.test(input.charAt(peg$currPos))) {
      s2 = input.charAt(peg$currPos);
      peg$currPos++;
    } else {
      s2 = peg$FAILED;
      if (peg$silentFails === 0) { peg$fail(peg$e22); }
    }
    if (s2 !== peg$FAILED) {
      while (s2 !== peg$FAILED) {
        s1.push(s2);
        if (peg$r6.test(input.charAt(peg$currPos))) {
          s2 = input.charAt(peg$currPos);
          peg$currPos++;
        } else {
          s2 = peg$FAILED;
          if (peg$silentFails === 0) { peg$fail(peg$e22); }
        }
      }
    } else {
      s1 = peg$FAILED;
    }
    if (s1 !== peg$FAILED) {
      peg$savedPos = s0;
      s1 = peg$f26(s1);
    }
    s0 = s1;

    return s0;
  }


   function ltoo (literal) {
    return {type: 'literal', value: literal}
   }

   function simpleLocation (location) {
    // Returns an object representing the position of the function within the expression,
    // demarcated by the position of its first character and last character. We calculate these values
    // using the offset because the expression could span multiple lines, and we don't want to deal
    // with column and line values.
    return {
     min: location.start.offset,
     max: location.end.offset
    }
   }

   var currentFunction;
   var currentArgs = [];

   var functions = [];
   var args = [];
   var variables = {};



  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)
    );
  }
}

module.exports = {
  SyntaxError: peg$SyntaxError,
  parse: peg$parse
};