@thi.ng/pointfree-lang/parser.js

Forth style syntax layer/compiler & CLI for the @thi.ng/pointfree DSL

// Generated by PEG.js v0.11.0-master.f69239d, https://pegjs.org/

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) {
  this.message = message;
  this.expected = expected;
  this.found = found;
  this.location = location;
  this.name = "SyntaxError";

  // istanbul ignore next
  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 = 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;
    },

    not: function(expectation) {
      return "not " + describeExpectation(expectation.expected);
    }
  };

  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$startRuleFunctions = { Root: peg$parseRoot };
  var peg$startRuleFunction = peg$parseRoot;

  var peg$c0 = ":";
  var peg$c1 = ";";
  var peg$c2 = "^{";
  var peg$c3 = "}";
  var peg$c4 = "[";
  var peg$c5 = "]";
  var peg$c6 = "{";
  var peg$c7 = "nil";
  var peg$c8 = "T";
  var peg$c9 = "F";
  var peg$c10 = "@";
  var peg$c11 = "!";
  var peg$c12 = "'";
  var peg$c13 = "(";
  var peg$c14 = ")";
  var peg$c15 = "//";
  var peg$c16 = "\n";
  var peg$c17 = "\"";
  var peg$c18 = "0b";
  var peg$c19 = "0x";
  var peg$c20 = ".";
  var peg$c21 = "e";

  var peg$r0 = /^[*?$%&#\/|~<>=_.+\-]/;
  var peg$r1 = /^[\-+]/;
  var peg$r2 = /^[01]/;
  var peg$r3 = /^[0-9a-fA-F]/;
  var peg$r4 = /^[a-z]/i;
  var peg$r5 = /^[0-9]/;
  var peg$r6 = /^[\n\r]/;
  var peg$r7 = /^[ ,\t\n\r]/;

  var peg$e0 = peg$literalExpectation(":", false);
  var peg$e1 = peg$literalExpectation(";", false);
  var peg$e2 = peg$literalExpectation("^{", false);
  var peg$e3 = peg$literalExpectation("}", false);
  var peg$e4 = peg$literalExpectation("[", false);
  var peg$e5 = peg$literalExpectation("]", false);
  var peg$e6 = peg$literalExpectation("{", false);
  var peg$e7 = peg$literalExpectation("nil", false);
  var peg$e8 = peg$literalExpectation("T", false);
  var peg$e9 = peg$literalExpectation("F", false);
  var peg$e10 = peg$classExpectation(["*", "?", "$", "%", "&", "#", "/", "|", "~", "<", ">", "=", "_", ".", "+", "-"], false, false);
  var peg$e11 = peg$literalExpectation("@", false);
  var peg$e12 = peg$literalExpectation("!", false);
  var peg$e13 = peg$literalExpectation("'", false);
  var peg$e14 = peg$literalExpectation("(", false);
  var peg$e15 = peg$literalExpectation(")", false);
  var peg$e16 = peg$anyExpectation();
  var peg$e17 = peg$literalExpectation("//", false);
  var peg$e18 = peg$literalExpectation("\n", false);
  var peg$e19 = peg$literalExpectation("\"", false);
  var peg$e20 = peg$classExpectation(["-", "+"], false, false);
  var peg$e21 = peg$literalExpectation("0b", false);
  var peg$e22 = peg$classExpectation(["0", "1"], false, false);
  var peg$e23 = peg$literalExpectation("0x", false);
  var peg$e24 = peg$classExpectation([["0", "9"], ["a", "f"], ["A", "F"]], false, false);
  var peg$e25 = peg$literalExpectation(".", false);
  var peg$e26 = peg$literalExpectation("e", false);
  var peg$e27 = peg$classExpectation([["a", "z"]], false, true);
  var peg$e28 = peg$classExpectation([["0", "9"]], false, false);
  var peg$e29 = peg$classExpectation([" ", ",", "\t", "\n", "\r"], false, false);

  var peg$f0 = function(expr) {
          return ast(expr);
      };
  var peg$f1 = function(expr) { return ast(expr); };
  var peg$f2 = function(id, locals, body) {
          return { type: "word", id: id.id, locals, body};
      };
  var peg$f3 = function(body) {
      	return body;
      };
  var peg$f4 = function(id) { return id.id; };
  var peg$f5 = function(body) {
          return { type: "array", body };
      };
  var peg$f6 = function(body) {
          return { type: "obj", body };
      };
  var peg$f7 = function(k, v) { return [ k, v ]; };
  var peg$f8 = function(k) { return ast(k); };
  var peg$f9 = function(val) { return ast(val); };
  var peg$f10 = function() {
          return {type: "nil", body: null};
      };
  var peg$f11 = function() {
          return {type: "boolean", body: text() == "T"};
      };
  var peg$f12 = function(id) {
          return {type: "sym", id};
      };
  var peg$f13 = function(id) {
          return {type: "var_deref", id: id.id}
      };
  var peg$f14 = function(id) {
          return {type: "var_store", id: id.id}
      };
  var peg$f15 = function(body) {
          return {type: "array", body: [body]};
      };
  var peg$f16 = function(body) {
          return body.indexOf("--") > 0 ?
              {
                  type: "stack_comment",
                  body: body.split("--").map(x => x.trim())
              } :
              {
                  type: "comment",
                  body: body.trim()
              };
      };
  var peg$f17 = function(body) {
          return {
              type: "comment",
              body: body.trim()
          };
      };
  var peg$f18 = function(body) {
          return {type: "string", body };
      };
  var peg$f19 = function(n) {
          return {type: "number", radix: 2, body: parseInt(n, 2)};
      };
  var peg$f20 = function(n) {
          return {type: "number", radix: 16, body: parseInt(n, 16)};
      };
  var peg$f21 = function() {
          return {type: "number", body: parseFloat(text())};
      };

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

  var peg$VALIDFILENAME = typeof options.filename === "string" && options.filename.length > 0;
  function peg$computeLocation(startPos, endPos) {
    var loc = {};

    if ( peg$VALIDFILENAME ) loc.filename = options.filename;

    var startPosDetails = peg$computePosDetails(startPos);
    loc.start = {
      offset: startPos,
      line: startPosDetails.line,
      column: startPosDetails.column
    };

    var endPosDetails = peg$computePosDetails(endPos);
    loc.end = {
      offset: endPos,
      line: endPosDetails.line,
      column: endPosDetails.column
    };

    return loc;
  }

  function peg$begin() {
    peg$expected.push({ pos: peg$currPos, variants: [] });
  }

  function peg$expect(expected) {
    var top = peg$expected[peg$expected.length - 1];

    if (peg$currPos < top.pos) { return; }

    if (peg$currPos > top.pos) {
      top.pos = peg$currPos;
      top.variants = [];
    }

    top.variants.push(expected);
  }

  function peg$end(invert) {
    var expected = peg$expected.pop();
    var top = peg$expected[peg$expected.length - 1];
    var variants = expected.variants;

    if (top.pos !== expected.pos) { return; }

    if (invert) {
      variants = variants.map(function(e) {
        return e.type === "not" ? e.expected : { type: "not", expected: e };
      });
    }

    Array.prototype.push.apply(top.variants, variants);
  }

  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$buildError() {
    var expected = peg$expected[0];
    var failPos = expected.pos;

    return peg$buildStructuredError(
      expected.variants,
      failPos < input.length ? input.charAt(failPos) : null,
      failPos < input.length
        ? peg$computeLocation(failPos, failPos + 1)
        : peg$computeLocation(failPos, failPos)
    );
  }

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

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

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

    return s0;
  }

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

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    s0 = peg$currPos;
    s1 = peg$parse_();
    s2 = peg$parseWord();
    if (s2 === peg$FAILED) {
      s2 = peg$parseNonWordExpr();
    }
    if (s2 !== peg$FAILED) {
      s3 = peg$parse_();
      peg$savedPos = s0;
      s0 = peg$f0(s2);
    } else {
      peg$currPos = s0;
      s0 = peg$FAILED;
    }

    return s0;
  }

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

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    s0 = peg$currPos;
    s1 = peg$parse_();
    s2 = peg$parseLitQuote();
    if (s2 === peg$FAILED) {
      s2 = peg$parseVar();
      if (s2 === peg$FAILED) {
        s2 = peg$parseLineComment();
        if (s2 === peg$FAILED) {
          s2 = peg$parseComment();
          if (s2 === peg$FAILED) {
            s2 = peg$parseArray();
            if (s2 === peg$FAILED) {
              s2 = peg$parseObj();
              if (s2 === peg$FAILED) {
                s2 = peg$parseAtom();
              }
            }
          }
        }
      }
    }
    if (s2 !== peg$FAILED) {
      s3 = peg$parse_();
      peg$savedPos = s0;
      s0 = peg$f1(s2);
    } else {
      peg$currPos = s0;
      s0 = peg$FAILED;
    }

    return s0;
  }

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

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    s0 = peg$currPos;
    rule$expects(peg$e0);
    if (input.charCodeAt(peg$currPos) === 58) {
      s1 = peg$c0;
      peg$currPos++;
    } else {
      s1 = peg$FAILED;
    }
    if (s1 !== peg$FAILED) {
      s2 = peg$parse__();
      if (s2 !== peg$FAILED) {
        s3 = peg$parseSym();
        if (s3 !== peg$FAILED) {
          s4 = peg$parseLocalVars();
          if (s4 === peg$FAILED) {
            s4 = null;
          }
          s5 = [];
          s6 = peg$parseNonWordExpr();
          if (s6 !== peg$FAILED) {
            while (s6 !== peg$FAILED) {
              s5.push(s6);
              s6 = peg$parseNonWordExpr();
            }
          } else {
            s5 = peg$FAILED;
          }
          if (s5 !== peg$FAILED) {
            rule$expects(peg$e1);
            if (input.charCodeAt(peg$currPos) === 59) {
              s6 = peg$c1;
              peg$currPos++;
            } else {
              s6 = peg$FAILED;
            }
            if (s6 !== peg$FAILED) {
              peg$savedPos = s0;
              s0 = peg$f2(s3, s4, s5);
            } else {
              peg$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$parseLocalVars() {
    var s0, s1, s2, s3, s4;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    s0 = peg$currPos;
    s1 = peg$parse_();
    rule$expects(peg$e2);
    if (input.substr(peg$currPos, 2) === peg$c2) {
      s2 = peg$c2;
      peg$currPos += 2;
    } else {
      s2 = peg$FAILED;
    }
    if (s2 !== peg$FAILED) {
      s3 = [];
      s4 = peg$parseSymList();
      if (s4 !== peg$FAILED) {
        while (s4 !== peg$FAILED) {
          s3.push(s4);
          s4 = peg$parseSymList();
        }
      } else {
        s3 = peg$FAILED;
      }
      if (s3 !== peg$FAILED) {
        rule$expects(peg$e3);
        if (input.charCodeAt(peg$currPos) === 125) {
          s4 = peg$c3;
          peg$currPos++;
        } else {
          s4 = peg$FAILED;
        }
        if (s4 !== peg$FAILED) {
          peg$savedPos = s0;
          s0 = peg$f3(s3);
        } else {
          peg$currPos = s0;
          s0 = peg$FAILED;
        }
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }
    } else {
      peg$currPos = s0;
      s0 = peg$FAILED;
    }

    return s0;
  }

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

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    s0 = peg$currPos;
    s1 = peg$parse_();
    s2 = peg$parseSym();
    if (s2 !== peg$FAILED) {
      s3 = peg$parse_();
      peg$savedPos = s0;
      s0 = peg$f4(s2);
    } else {
      peg$currPos = s0;
      s0 = peg$FAILED;
    }

    return s0;
  }

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

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    s0 = peg$currPos;
    rule$expects(peg$e4);
    if (input.charCodeAt(peg$currPos) === 91) {
      s1 = peg$c4;
      peg$currPos++;
    } else {
      s1 = peg$FAILED;
    }
    if (s1 !== peg$FAILED) {
      s2 = [];
      s3 = peg$parseNonWordExpr();
      while (s3 !== peg$FAILED) {
        s2.push(s3);
        s3 = peg$parseNonWordExpr();
      }
      rule$expects(peg$e5);
      if (input.charCodeAt(peg$currPos) === 93) {
        s3 = peg$c5;
        peg$currPos++;
      } else {
        s3 = peg$FAILED;
      }
      if (s3 !== peg$FAILED) {
        peg$savedPos = s0;
        s0 = peg$f5(s2);
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }
    } else {
      peg$currPos = s0;
      s0 = peg$FAILED;
    }

    return s0;
  }

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

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    s0 = peg$currPos;
    rule$expects(peg$e6);
    if (input.charCodeAt(peg$currPos) === 123) {
      s1 = peg$c6;
      peg$currPos++;
    } else {
      s1 = peg$FAILED;
    }
    if (s1 !== peg$FAILED) {
      s2 = peg$parse_();
      s3 = [];
      s4 = peg$parseObjPair();
      while (s4 !== peg$FAILED) {
        s3.push(s4);
        s4 = peg$parseObjPair();
      }
      rule$expects(peg$e3);
      if (input.charCodeAt(peg$currPos) === 125) {
        s4 = peg$c3;
        peg$currPos++;
      } else {
        s4 = peg$FAILED;
      }
      if (s4 !== peg$FAILED) {
        peg$savedPos = s0;
        s0 = peg$f6(s3);
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }
    } else {
      peg$currPos = s0;
      s0 = peg$FAILED;
    }

    return s0;
  }

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

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    s0 = peg$currPos;
    s1 = peg$parseObjKey();
    if (s1 !== peg$FAILED) {
      s2 = peg$parseObjVal();
      if (s2 !== peg$FAILED) {
        peg$savedPos = s0;
        s0 = peg$f7(s1, s2);
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }
    } else {
      peg$currPos = s0;
      s0 = peg$FAILED;
    }

    return s0;
  }

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

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    s0 = peg$currPos;
    s1 = peg$parseString();
    if (s1 === peg$FAILED) {
      s1 = peg$parseNumber();
      if (s1 === peg$FAILED) {
        s1 = peg$parseVarDeref();
        if (s1 === peg$FAILED) {
          s1 = peg$parseSym();
        }
      }
    }
    if (s1 !== peg$FAILED) {
      rule$expects(peg$e0);
      if (input.charCodeAt(peg$currPos) === 58) {
        s2 = peg$c0;
        peg$currPos++;
      } else {
        s2 = peg$FAILED;
      }
      if (s2 !== peg$FAILED) {
        peg$savedPos = s0;
        s0 = peg$f8(s1);
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }
    } else {
      peg$currPos = s0;
      s0 = peg$FAILED;
    }

    return s0;
  }

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

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    s0 = peg$currPos;
    s1 = peg$parse_();
    s2 = peg$parseAtom();
    if (s2 === peg$FAILED) {
      s2 = peg$parseLitQuote();
      if (s2 === peg$FAILED) {
        s2 = peg$parseVarDeref();
        if (s2 === peg$FAILED) {
          s2 = peg$parseArray();
          if (s2 === peg$FAILED) {
            s2 = peg$parseObj();
          }
        }
      }
    }
    if (s2 !== peg$FAILED) {
      s3 = peg$parse_();
      peg$savedPos = s0;
      s0 = peg$f9(s2);
    } else {
      peg$currPos = s0;
      s0 = peg$FAILED;
    }

    return s0;
  }

  function peg$parseAtom() {
    var s0;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    s0 = peg$parseString();
    if (s0 === peg$FAILED) {
      s0 = peg$parseNumber();
      if (s0 === peg$FAILED) {
        s0 = peg$parseBoolean();
        if (s0 === peg$FAILED) {
          s0 = peg$parseNil();
          if (s0 === peg$FAILED) {
            s0 = peg$parseSym();
          }
        }
      }
    }

    return s0;
  }

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

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    s0 = peg$currPos;
    rule$expects(peg$e7);
    if (input.substr(peg$currPos, 3) === peg$c7) {
      s1 = peg$c7;
      peg$currPos += 3;
    } else {
      s1 = peg$FAILED;
    }
    if (s1 !== peg$FAILED) {
      peg$savedPos = s0;
      s1 = peg$f10();
    }
    s0 = s1;

    return s0;
  }

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

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    s0 = peg$currPos;
    s1 = peg$currPos;
    rule$expects(peg$e8);
    if (input.charCodeAt(peg$currPos) === 84) {
      s2 = peg$c8;
      peg$currPos++;
    } else {
      s2 = peg$FAILED;
    }
    if (s2 === peg$FAILED) {
      rule$expects(peg$e9);
      if (input.charCodeAt(peg$currPos) === 70) {
        s2 = peg$c9;
        peg$currPos++;
      } else {
        s2 = peg$FAILED;
      }
    }
    if (s2 !== peg$FAILED) {
      s1 = input.substring(s1, peg$currPos);
    } else {
      s1 = s2;
    }
    if (s1 !== peg$FAILED) {
      peg$savedPos = s0;
      s1 = peg$f11();
    }
    s0 = s1;

    return s0;
  }

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

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    s0 = peg$currPos;
    s1 = peg$currPos;
    s2 = peg$currPos;
    s3 = peg$parseAlpha();
    if (s3 === peg$FAILED) {
      s3 = peg$parseSymChars();
    }
    if (s3 !== peg$FAILED) {
      s4 = [];
      s5 = peg$parseAlphaNum();
      if (s5 === peg$FAILED) {
        s5 = peg$parseSymChars();
      }
      while (s5 !== peg$FAILED) {
        s4.push(s5);
        s5 = peg$parseAlphaNum();
        if (s5 === peg$FAILED) {
          s5 = peg$parseSymChars();
        }
      }
      s3 = [s3, s4];
      s2 = s3;
    } else {
      peg$currPos = s2;
      s2 = peg$FAILED;
    }
    if (s2 !== peg$FAILED) {
      s1 = input.substring(s1, peg$currPos);
    } else {
      s1 = s2;
    }
    if (s1 !== peg$FAILED) {
      peg$savedPos = s0;
      s1 = peg$f12(s1);
    }
    s0 = s1;

    return s0;
  }

  function peg$parseSymChars() {
    var s0;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    rule$expects(peg$e10);
    if (peg$r0.test(input.charAt(peg$currPos))) {
      s0 = input.charAt(peg$currPos);
      peg$currPos++;
    } else {
      s0 = peg$FAILED;
    }

    return s0;
  }

  function peg$parseVar() {
    var s0;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    s0 = peg$parseVarDeref();
    if (s0 === peg$FAILED) {
      s0 = peg$parseVarStore();
    }

    return s0;
  }

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

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    s0 = peg$currPos;
    rule$expects(peg$e11);
    if (input.charCodeAt(peg$currPos) === 64) {
      s1 = peg$c10;
      peg$currPos++;
    } else {
      s1 = peg$FAILED;
    }
    if (s1 !== peg$FAILED) {
      s2 = peg$parseSym();
      if (s2 !== peg$FAILED) {
        peg$savedPos = s0;
        s0 = peg$f13(s2);
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }
    } else {
      peg$currPos = s0;
      s0 = peg$FAILED;
    }

    return s0;
  }

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

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    s0 = peg$currPos;
    s1 = peg$parseSym();
    if (s1 !== peg$FAILED) {
      rule$expects(peg$e12);
      if (input.charCodeAt(peg$currPos) === 33) {
        s2 = peg$c11;
        peg$currPos++;
      } else {
        s2 = peg$FAILED;
      }
      if (s2 !== peg$FAILED) {
        peg$savedPos = s0;
        s0 = peg$f14(s1);
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }
    } else {
      peg$currPos = s0;
      s0 = peg$FAILED;
    }

    return s0;
  }

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

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    s0 = peg$currPos;
    rule$expects(peg$e13);
    if (input.charCodeAt(peg$currPos) === 39) {
      s1 = peg$c12;
      peg$currPos++;
    } else {
      s1 = peg$FAILED;
    }
    if (s1 !== peg$FAILED) {
      s2 = peg$parseNonWordExpr();
      if (s2 !== peg$FAILED) {
        peg$savedPos = s0;
        s0 = peg$f15(s2);
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }
    } else {
      peg$currPos = s0;
      s0 = peg$FAILED;
    }

    return s0;
  }

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

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    s0 = peg$currPos;
    s1 = [];
    rule$expects(peg$e14);
    if (input.charCodeAt(peg$currPos) === 40) {
      s2 = peg$c13;
      peg$currPos++;
    } else {
      s2 = peg$FAILED;
    }
    if (s2 !== peg$FAILED) {
      while (s2 !== peg$FAILED) {
        s1.push(s2);
        rule$expects(peg$e14);
        if (input.charCodeAt(peg$currPos) === 40) {
          s2 = peg$c13;
          peg$currPos++;
        } else {
          s2 = peg$FAILED;
        }
      }
    } else {
      s1 = peg$FAILED;
    }
    if (s1 !== peg$FAILED) {
      s2 = peg$currPos;
      s3 = [];
      s4 = peg$currPos;
      s5 = peg$currPos;
      peg$begin();
      rule$expects(peg$e15);
      if (input.charCodeAt(peg$currPos) === 41) {
        s6 = peg$c14;
        peg$currPos++;
      } else {
        s6 = peg$FAILED;
      }
      peg$end(true);
      if (s6 === peg$FAILED) {
        s5 = undefined;
      } else {
        peg$currPos = s5;
        s5 = peg$FAILED;
      }
      if (s5 !== peg$FAILED) {
        rule$expects(peg$e16);
        if (input.length > peg$currPos) {
          s6 = input.charAt(peg$currPos);
          peg$currPos++;
        } else {
          s6 = peg$FAILED;
        }
        if (s6 !== peg$FAILED) {
          s5 = [s5, s6];
          s4 = s5;
        } else {
          peg$currPos = s4;
          s4 = peg$FAILED;
        }
      } else {
        peg$currPos = s4;
        s4 = peg$FAILED;
      }
      while (s4 !== peg$FAILED) {
        s3.push(s4);
        s4 = peg$currPos;
        s5 = peg$currPos;
        peg$begin();
        rule$expects(peg$e15);
        if (input.charCodeAt(peg$currPos) === 41) {
          s6 = peg$c14;
          peg$currPos++;
        } else {
          s6 = peg$FAILED;
        }
        peg$end(true);
        if (s6 === peg$FAILED) {
          s5 = undefined;
        } else {
          peg$currPos = s5;
          s5 = peg$FAILED;
        }
        if (s5 !== peg$FAILED) {
          rule$expects(peg$e16);
          if (input.length > peg$currPos) {
            s6 = input.charAt(peg$currPos);
            peg$currPos++;
          } else {
            s6 = peg$FAILED;
          }
          if (s6 !== peg$FAILED) {
            s5 = [s5, s6];
            s4 = s5;
          } else {
            peg$currPos = s4;
            s4 = peg$FAILED;
          }
        } else {
          peg$currPos = s4;
          s4 = peg$FAILED;
        }
      }
      s2 = input.substring(s2, peg$currPos);
      rule$expects(peg$e15);
      if (input.charCodeAt(peg$currPos) === 41) {
        s3 = peg$c14;
        peg$currPos++;
      } else {
        s3 = peg$FAILED;
      }
      if (s3 !== peg$FAILED) {
        peg$savedPos = s0;
        s0 = peg$f16(s2);
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }
    } else {
      peg$currPos = s0;
      s0 = peg$FAILED;
    }

    return s0;
  }

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

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    s0 = peg$currPos;
    rule$expects(peg$e17);
    if (input.substr(peg$currPos, 2) === peg$c15) {
      s1 = peg$c15;
      peg$currPos += 2;
    } else {
      s1 = peg$FAILED;
    }
    if (s1 !== peg$FAILED) {
      s2 = peg$currPos;
      s3 = [];
      s4 = peg$currPos;
      s5 = peg$currPos;
      peg$begin();
      rule$expects(peg$e18);
      if (input.charCodeAt(peg$currPos) === 10) {
        s6 = peg$c16;
        peg$currPos++;
      } else {
        s6 = peg$FAILED;
      }
      peg$end(true);
      if (s6 === peg$FAILED) {
        s5 = undefined;
      } else {
        peg$currPos = s5;
        s5 = peg$FAILED;
      }
      if (s5 !== peg$FAILED) {
        rule$expects(peg$e16);
        if (input.length > peg$currPos) {
          s6 = input.charAt(peg$currPos);
          peg$currPos++;
        } else {
          s6 = peg$FAILED;
        }
        if (s6 !== peg$FAILED) {
          s5 = [s5, s6];
          s4 = s5;
        } else {
          peg$currPos = s4;
          s4 = peg$FAILED;
        }
      } else {
        peg$currPos = s4;
        s4 = peg$FAILED;
      }
      while (s4 !== peg$FAILED) {
        s3.push(s4);
        s4 = peg$currPos;
        s5 = peg$currPos;
        peg$begin();
        rule$expects(peg$e18);
        if (input.charCodeAt(peg$currPos) === 10) {
          s6 = peg$c16;
          peg$currPos++;
        } else {
          s6 = peg$FAILED;
        }
        peg$end(true);
        if (s6 === peg$FAILED) {
          s5 = undefined;
        } else {
          peg$currPos = s5;
          s5 = peg$FAILED;
        }
        if (s5 !== peg$FAILED) {
          rule$expects(peg$e16);
          if (input.length > peg$currPos) {
            s6 = input.charAt(peg$currPos);
            peg$currPos++;
          } else {
            s6 = peg$FAILED;
          }
          if (s6 !== peg$FAILED) {
            s5 = [s5, s6];
            s4 = s5;
          } else {
            peg$currPos = s4;
            s4 = peg$FAILED;
          }
        } else {
          peg$currPos = s4;
          s4 = peg$FAILED;
        }
      }
      s2 = input.substring(s2, peg$currPos);
      rule$expects(peg$e18);
      if (input.charCodeAt(peg$currPos) === 10) {
        s3 = peg$c16;
        peg$currPos++;
      } else {
        s3 = peg$FAILED;
      }
      if (s3 !== 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$parseString() {
    var s0, s1, s2, s3, s4, s5, s6;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    s0 = peg$currPos;
    rule$expects(peg$e19);
    if (input.charCodeAt(peg$currPos) === 34) {
      s1 = peg$c17;
      peg$currPos++;
    } else {
      s1 = peg$FAILED;
    }
    if (s1 !== peg$FAILED) {
      s2 = peg$currPos;
      s3 = [];
      s4 = peg$currPos;
      s5 = peg$currPos;
      peg$begin();
      rule$expects(peg$e19);
      if (input.charCodeAt(peg$currPos) === 34) {
        s6 = peg$c17;
        peg$currPos++;
      } else {
        s6 = peg$FAILED;
      }
      peg$end(true);
      if (s6 === peg$FAILED) {
        s5 = undefined;
      } else {
        peg$currPos = s5;
        s5 = peg$FAILED;
      }
      if (s5 !== peg$FAILED) {
        rule$expects(peg$e16);
        if (input.length > peg$currPos) {
          s6 = input.charAt(peg$currPos);
          peg$currPos++;
        } else {
          s6 = peg$FAILED;
        }
        if (s6 !== peg$FAILED) {
          s5 = [s5, s6];
          s4 = s5;
        } else {
          peg$currPos = s4;
          s4 = peg$FAILED;
        }
      } else {
        peg$currPos = s4;
        s4 = peg$FAILED;
      }
      while (s4 !== peg$FAILED) {
        s3.push(s4);
        s4 = peg$currPos;
        s5 = peg$currPos;
        peg$begin();
        rule$expects(peg$e19);
        if (input.charCodeAt(peg$currPos) === 34) {
          s6 = peg$c17;
          peg$currPos++;
        } else {
          s6 = peg$FAILED;
        }
        peg$end(true);
        if (s6 === peg$FAILED) {
          s5 = undefined;
        } else {
          peg$currPos = s5;
          s5 = peg$FAILED;
        }
        if (s5 !== peg$FAILED) {
          rule$expects(peg$e16);
          if (input.length > peg$currPos) {
            s6 = input.charAt(peg$currPos);
            peg$currPos++;
          } else {
            s6 = peg$FAILED;
          }
          if (s6 !== peg$FAILED) {
            s5 = [s5, s6];
            s4 = s5;
          } else {
            peg$currPos = s4;
            s4 = peg$FAILED;
          }
        } else {
          peg$currPos = s4;
          s4 = peg$FAILED;
        }
      }
      s2 = input.substring(s2, peg$currPos);
      rule$expects(peg$e19);
      if (input.charCodeAt(peg$currPos) === 34) {
        s3 = peg$c17;
        peg$currPos++;
      } else {
        s3 = peg$FAILED;
      }
      if (s3 !== peg$FAILED) {
        peg$savedPos = s0;
        s0 = peg$f18(s2);
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }
    } else {
      peg$currPos = s0;
      s0 = peg$FAILED;
    }

    return s0;
  }

  function peg$parseNumber() {
    var s0;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    s0 = peg$parseHex();
    if (s0 === peg$FAILED) {
      s0 = peg$parseBinary();
      if (s0 === peg$FAILED) {
        s0 = peg$parseDecimal();
      }
    }

    return s0;
  }

  function peg$parseSign() {
    var s0;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    rule$expects(peg$e20);
    if (peg$r1.test(input.charAt(peg$currPos))) {
      s0 = input.charAt(peg$currPos);
      peg$currPos++;
    } else {
      s0 = peg$FAILED;
    }

    return s0;
  }

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

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    s0 = peg$currPos;
    rule$expects(peg$e21);
    if (input.substr(peg$currPos, 2) === peg$c18) {
      s1 = peg$c18;
      peg$currPos += 2;
    } else {
      s1 = peg$FAILED;
    }
    if (s1 !== peg$FAILED) {
      s2 = peg$currPos;
      s3 = [];
      rule$expects(peg$e22);
      if (peg$r2.test(input.charAt(peg$currPos))) {
        s4 = input.charAt(peg$currPos);
        peg$currPos++;
      } else {
        s4 = peg$FAILED;
      }
      if (s4 !== peg$FAILED) {
        while (s4 !== peg$FAILED) {
          s3.push(s4);
          rule$expects(peg$e22);
          if (peg$r2.test(input.charAt(peg$currPos))) {
            s4 = input.charAt(peg$currPos);
            peg$currPos++;
          } else {
            s4 = peg$FAILED;
          }
        }
      } else {
        s3 = peg$FAILED;
      }
      if (s3 !== peg$FAILED) {
        s2 = input.substring(s2, peg$currPos);
      } else {
        s2 = s3;
      }
      if (s2 !== peg$FAILED) {
        peg$savedPos = s0;
        s0 = peg$f19(s2);
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }
    } else {
      peg$currPos = s0;
      s0 = peg$FAILED;
    }

    return s0;
  }

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

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    s0 = peg$currPos;
    rule$expects(peg$e23);
    if (input.substr(peg$currPos, 2) === peg$c19) {
      s1 = peg$c19;
      peg$currPos += 2;
    } else {
      s1 = peg$FAILED;
    }
    if (s1 !== peg$FAILED) {
      s2 = peg$currPos;
      s3 = [];
      rule$expects(peg$e24);
      if (peg$r3.test(input.charAt(peg$currPos))) {
        s4 = input.charAt(peg$currPos);
        peg$currPos++;
      } else {
        s4 = peg$FAILED;
      }
      if (s4 !== peg$FAILED) {
        while (s4 !== peg$FAILED) {
          s3.push(s4);
          rule$expects(peg$e24);
          if (peg$r3.test(input.charAt(peg$currPos))) {
            s4 = input.charAt(peg$currPos);
            peg$currPos++;
          } else {
            s4 = peg$FAILED;
          }
        }
      } else {
        s3 = peg$FAILED;
      }
      if (s3 !== peg$FAILED) {
        s2 = input.substring(s2, peg$currPos);
      } else {
        s2 = s3;
      }
      if (s2 !== peg$FAILED) {
        peg$savedPos = s0;
        s0 = peg$f20(s2);
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }
    } else {
      peg$currPos = s0;
      s0 = peg$FAILED;
    }

    return s0;
  }

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

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    s0 = peg$currPos;
    s1 = peg$parseSign();
    if (s1 === peg$FAILED) {
      s1 = null;
    }
    s2 = peg$parseUint();
    if (s2 !== peg$FAILED) {
      s1 = [s1, s2];
      s0 = s1;
    } else {
      peg$currPos = s0;
      s0 = peg$FAILED;
    }

    return s0;
  }

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

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

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

    return s0;
  }

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

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    s0 = peg$currPos;
    s1 = peg$parseInt();
    if (s1 !== peg$FAILED) {
      s2 = peg$currPos;
      rule$expects(peg$e25);
      if (input.charCodeAt(peg$currPos) === 46) {
        s3 = peg$c20;
        peg$currPos++;
      } else {
        s3 = peg$FAILED;
      }
      if (s3 !== peg$FAILED) {
        s4 = peg$parseUint();
        if (s4 === peg$FAILED) {
          s4 = null;
        }
        s3 = [s3, s4];
        s2 = s3;
      } else {
        peg$currPos = s2;
        s2 = peg$FAILED;
      }
      if (s2 === peg$FAILED) {
        s2 = null;
      }
      s3 = peg$currPos;
      rule$expects(peg$e26);
      if (input.charCodeAt(peg$currPos) === 101) {
        s4 = peg$c21;
        peg$currPos++;
      } else {
        s4 = peg$FAILED;
      }
      if (s4 !== peg$FAILED) {
        s5 = peg$parseInt();
        if (s5 !== peg$FAILED) {
          s4 = [s4, s5];
          s3 = s4;
        } else {
          peg$currPos = s3;
          s3 = peg$FAILED;
        }
      } else {
        peg$currPos = s3;
        s3 = peg$FAILED;
      }
      if (s3 === peg$FAILED) {
        s3 = null;
      }
      peg$savedPos = s0;
      s0 = peg$f21();
    } else {
      peg$currPos = s0;
      s0 = peg$FAILED;
    }

    return s0;
  }

  function peg$parseAlphaNum() {
    var s0;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    s0 = peg$parseAlpha();
    if (s0 === peg$FAILED) {
      s0 = peg$parseDigit();
    }

    return s0;
  }

  function peg$parseAlpha() {
    var s0;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    rule$expects(peg$e27);
    if (peg$r4.test(input.charAt(peg$currPos))) {
      s0 = input.charAt(peg$currPos);
      peg$currPos++;
    } else {
      s0 = peg$FAILED;
    }

    return s0;
  }

  function peg$parseDigit() {
    var s0;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    rule$expects(peg$e28);
    if (peg$r5.test(input.charAt(peg$currPos))) {
      s0 = input.charAt(peg$currPos);
      peg$currPos++;
    } else {
      s0 = peg$FAILED;
    }

    return s0;
  }

  function peg$parseLineBreak() {
    var s0;

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    if (peg$r6.test(input.charAt(peg$currPos))) {
      s0 = input.charAt(peg$currPos);
      peg$currPos++;
    } else {
      s0 = peg$FAILED;
    }

    return s0;
  }

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

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    s0 = [];
    rule$expects(peg$e29);
    if (peg$r7.test(input.charAt(peg$currPos))) {
      s1 = input.charAt(peg$currPos);
      peg$currPos++;
    } else {
      s1 = peg$FAILED;
    }
    while (s1 !== peg$FAILED) {
      s0.push(s1);
      rule$expects(peg$e29);
      if (peg$r7.test(input.charAt(peg$currPos))) {
        s1 = input.charAt(peg$currPos);
        peg$currPos++;
      } else {
        s1 = peg$FAILED;
      }
    }

    return s0;
  }

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

    var rule$expects = function (expected) {
      if (peg$silentFails === 0) peg$expect(expected);
    }

    s0 = [];
    rule$expects(peg$e29);
    if (peg$r7.test(input.charAt(peg$currPos))) {
      s1 = input.charAt(peg$currPos);
      peg$currPos++;
    } else {
      s1 = peg$FAILED;
    }
    if (s1 !== peg$FAILED) {
      while (s1 !== peg$FAILED) {
        s0.push(s1);
        rule$expects(peg$e29);
        if (peg$r7.test(input.charAt(peg$currPos))) {
          s1 = input.charAt(peg$currPos);
          peg$currPos++;
        } else {
          s1 = peg$FAILED;
        }
      }
    } else {
      s0 = peg$FAILED;
    }

    return s0;
  }


      const ast = (node) => {
          const loc = location().start;
          node.loc = [loc.line, loc.column];
          return node;
      };


  peg$begin();
  peg$result = peg$startRuleFunction();

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

    throw peg$buildError();
  }
}

export {
  peg$SyntaxError as SyntaxError,
  peg$parse as parse
};

export default {
  SyntaxError: peg$SyntaxError,
  parse: peg$parse
};