jashkenas--coffeescript/lib/coffee-script/lexer.js

// Generated by CoffeeScript 1.8.0
(function() {
  var BOM, BOOL, CALLABLE, CODE, COFFEE_ALIASES, COFFEE_ALIAS_MAP, COFFEE_KEYWORDS, COMMENT, COMPARE, COMPOUND_ASSIGN, HERECOMMENT_ILLEGAL, HEREDOC_DOUBLE, HEREDOC_INDENT, HEREDOC_SINGLE, HEREGEX, HEREGEX_OMIT, IDENTIFIER, INDENTABLE_CLOSERS, INDEXABLE, INVERSES, JSTOKEN, JS_FORBIDDEN, JS_KEYWORDS, LEADING_BLANK_LINE, LINE_BREAK, LINE_CONTINUER, LOGIC, Lexer, MATH, MULTILINER, MULTI_DENT, NOT_REGEX, NUMBER, OCTAL_ESCAPE, OPERATOR, POSSIBLY_DIVISION, REGEX, REGEX_FLAGS, REGEX_ILLEGAL, RELATION, RESERVED, Rewriter, SHIFT, STRICT_PROSCRIBED, STRING_DOUBLE, STRING_OMIT, STRING_SINGLE, STRING_START, TRAILING_BLANK_LINE, TRAILING_SPACES, UNARY, UNARY_MATH, VALID_FLAGS, WHITESPACE, compact, count, invertLiterate, key, last, locationDataToString, repeat, starts, throwSyntaxError, _ref, _ref1,
    __indexOf = [].indexOf || function(item) { for (var i = 0, l = this.length; i < l; i++) { if (i in this && this[i] === item) return i; } return -1; };

  _ref = require('./rewriter'), Rewriter = _ref.Rewriter, INVERSES = _ref.INVERSES;

  _ref1 = require('./helpers'), count = _ref1.count, starts = _ref1.starts, compact = _ref1.compact, last = _ref1.last, repeat = _ref1.repeat, invertLiterate = _ref1.invertLiterate, locationDataToString = _ref1.locationDataToString, throwSyntaxError = _ref1.throwSyntaxError;

  exports.Lexer = Lexer = (function() {
    function Lexer() {}

    Lexer.prototype.tokenize = function(code, opts) {
      var consumed, end, i, _ref2;
      if (opts == null) {
        opts = {};
      }
      this.literate = opts.literate;
      this.indent = 0;
      this.baseIndent = 0;
      this.indebt = 0;
      this.outdebt = 0;
      this.indents = [];
      this.ends = [];
      this.tokens = [];
      this.chunkLine = opts.line || 0;
      this.chunkColumn = opts.column || 0;
      code = this.clean(code);
      i = 0;
      while (this.chunk = code.slice(i)) {
        consumed = this.identifierToken() || this.commentToken() || this.whitespaceToken() || this.lineToken() || this.stringToken() || this.numberToken() || this.regexToken() || this.jsToken() || this.literalToken();
        _ref2 = this.getLineAndColumnFromChunk(consumed), this.chunkLine = _ref2[0], this.chunkColumn = _ref2[1];
        i += consumed;
        if (opts.untilBalanced && this.ends.length === 0) {
          return {
            tokens: this.tokens,
            index: i
          };
        }
      }
      this.closeIndentation();
      if (end = this.ends.pop()) {
        throwSyntaxError("missing " + end.tag, end.origin[2]);
      }
      if (opts.rewrite === false) {
        return this.tokens;
      }
      return (new Rewriter).rewrite(this.tokens);
    };

    Lexer.prototype.clean = function(code) {
      if (code.charCodeAt(0) === BOM) {
        code = code.slice(1);
      }
      code = code.replace(/\r/g, '').replace(TRAILING_SPACES, '');
      if (WHITESPACE.test(code)) {
        code = "\n" + code;
        this.chunkLine--;
      }
      if (this.literate) {
        code = invertLiterate(code);
      }
      return code;
    };

    Lexer.prototype.identifierToken = function() {
      var colon, colonOffset, forcedIdentifier, id, idLength, input, match, poppedToken, prev, tag, tagToken, _ref2, _ref3, _ref4;
      if (!(match = IDENTIFIER.exec(this.chunk))) {
        return 0;
      }
      input = match[0], id = match[1], colon = match[2];
      idLength = id.length;
      poppedToken = void 0;
      if (id === 'own' && this.tag() === 'FOR') {
        this.token('OWN', id);
        return id.length;
      }
      if (id === 'from' && this.tag() === 'YIELD') {
        this.token('FROM', id);
        return id.length;
      }
      forcedIdentifier = colon || (prev = last(this.tokens)) && (((_ref2 = prev[0]) === '.' || _ref2 === '?.' || _ref2 === '::' || _ref2 === '?::') || !prev.spaced && prev[0] === '@');
      tag = 'IDENTIFIER';
      if (!forcedIdentifier && (__indexOf.call(JS_KEYWORDS, id) >= 0 || __indexOf.call(COFFEE_KEYWORDS, id) >= 0)) {
        tag = id.toUpperCase();
        if (tag === 'WHEN' && (_ref3 = this.tag(), __indexOf.call(LINE_BREAK, _ref3) >= 0)) {
          tag = 'LEADING_WHEN';
        } else if (tag === 'FOR') {
          this.seenFor = true;
        } else if (tag === 'UNLESS') {
          tag = 'IF';
        } else if (__indexOf.call(UNARY, tag) >= 0) {
          tag = 'UNARY';
        } else if (__indexOf.call(RELATION, tag) >= 0) {
          if (tag !== 'INSTANCEOF' && this.seenFor) {
            tag = 'FOR' + tag;
            this.seenFor = false;
          } else {
            tag = 'RELATION';
            if (this.value() === '!') {
              poppedToken = this.tokens.pop();
              id = '!' + id;
            }
          }
        }
      }
      if (__indexOf.call(JS_FORBIDDEN, id) >= 0) {
        if (forcedIdentifier) {
          tag = 'IDENTIFIER';
          id = new String(id);
          id.reserved = true;
        } else if (__indexOf.call(RESERVED, id) >= 0) {
          this.error("reserved word \"" + id + "\"");
        }
      }
      if (!forcedIdentifier) {
        if (__indexOf.call(COFFEE_ALIASES, id) >= 0) {
          id = COFFEE_ALIAS_MAP[id];
        }
        tag = (function() {
          switch (id) {
            case '!':
              return 'UNARY';
            case '==':
            case '!=':
              return 'COMPARE';
            case '&&':
            case '||':
              return 'LOGIC';
            case 'true':
            case 'false':
              return 'BOOL';
            case 'break':
            case 'continue':
              return 'STATEMENT';
            default:
              return tag;
          }
        })();
      }
      tagToken = this.token(tag, id, 0, idLength);
      tagToken.variable = !forcedIdentifier;
      if (poppedToken) {
        _ref4 = [poppedToken[2].first_line, poppedToken[2].first_column], tagToken[2].first_line = _ref4[0], tagToken[2].first_column = _ref4[1];
      }
      if (colon) {
        colonOffset = input.lastIndexOf(':');
        this.token(':', ':', colonOffset, colon.length);
      }
      return input.length;
    };

    Lexer.prototype.numberToken = function() {
      var binaryLiteral, lexedLength, match, number, octalLiteral;
      if (!(match = NUMBER.exec(this.chunk))) {
        return 0;
      }
      number = match[0];
      if (/^0[BOX]/.test(number)) {
        this.error("radix prefix '" + number + "' must be lowercase");
      } else if (/E/.test(number) && !/^0x/.test(number)) {
        this.error("exponential notation '" + number + "' must be indicated with a lowercase 'e'");
      } else if (/^0\d*[89]/.test(number)) {
        this.error("decimal literal '" + number + "' must not be prefixed with '0'");
      } else if (/^0\d+/.test(number)) {
        this.error("octal literal '" + number + "' must be prefixed with '0o'");
      }
      lexedLength = number.length;
      if (octalLiteral = /^0o([0-7]+)/.exec(number)) {
        number = '0x' + parseInt(octalLiteral[1], 8).toString(16);
      }
      if (binaryLiteral = /^0b([01]+)/.exec(number)) {
        number = '0x' + parseInt(binaryLiteral[1], 2).toString(16);
      }
      this.token('NUMBER', number, 0, lexedLength);
      return lexedLength;
    };

    Lexer.prototype.stringToken = function() {
      var $, attempt, doc, end, heredoc, i, indent, indentRegex, match, quote, regex, start, token, tokens, _ref2, _ref3;
      quote = (STRING_START.exec(this.chunk) || [])[0];
      if (!quote) {
        return 0;
      }
      regex = (function() {
        switch (quote) {
          case "'":
            return STRING_SINGLE;
          case '"':
            return STRING_DOUBLE;
          case "'''":
            return HEREDOC_SINGLE;
          case '"""':
            return HEREDOC_DOUBLE;
        }
      })();
      heredoc = quote.length === 3;
      start = quote.length;
      _ref2 = this.matchWithInterpolations(this.chunk.slice(start), regex, quote, start), tokens = _ref2.tokens, end = _ref2.index;
      $ = tokens.length - 1;
      if (heredoc) {
        indent = null;
        doc = ((function() {
          var _i, _len, _results;
          _results = [];
          for (i = _i = 0, _len = tokens.length; _i < _len; i = ++_i) {
            token = tokens[i];
            if (token[0] === 'NEOSTRING') {
              _results.push(token[1]);
            }
          }
          return _results;
        })()).join('#{}');
        while (match = HEREDOC_INDENT.exec(doc)) {
          attempt = match[1];
          if (indent === null || (0 < (_ref3 = attempt.length) && _ref3 < indent.length)) {
            indent = attempt;
          }
        }
        if (indent) {
          indentRegex = RegExp("^" + indent, "gm");
        }
        this.mergeInterpolationTokens(tokens, {
          quote: quote[0],
          start: start,
          end: end
        }, (function(_this) {
          return function(value, i) {
            value = _this.formatString(value);
            if (i === 0) {
              value = value.replace(LEADING_BLANK_LINE, '');
            }
            if (i === $) {
              value = value.replace(TRAILING_BLANK_LINE, '');
            }
            value = value.replace(indentRegex, '');
            value = value.replace(MULTILINER, '\\n');
            return value;
          };
        })(this));
      } else {
        this.mergeInterpolationTokens(tokens, {
          quote: quote,
          start: start,
          end: end
        }, (function(_this) {
          return function(value, i) {
            value = _this.formatString(value);
            value = value.replace(STRING_OMIT, function(match, offset) {
              if ((i === 0 && offset === 0) || (i === $ && offset + match.length === value.length)) {
                return '';
              } else {
                return ' ';
              }
            });
            return value;
          };
        })(this));
      }
      return end;
    };

    Lexer.prototype.commentToken = function() {
      var comment, here, match;
      if (!(match = this.chunk.match(COMMENT))) {
        return 0;
      }
      comment = match[0], here = match[1];
      if (here) {
        if (match = HERECOMMENT_ILLEGAL.exec(comment)) {
          this.error("block comments cannot contain " + match[0], match.index);
        }
        if (here.indexOf('\n') >= 0) {
          here = here.replace(RegExp("\\n" + (repeat(' ', this.indent)), "g"), '\n');
        }
        this.token('HERECOMMENT', here, 0, comment.length);
      }
      return comment.length;
    };

    Lexer.prototype.jsToken = function() {
      var match, script;
      if (!(this.chunk.charAt(0) === '`' && (match = JSTOKEN.exec(this.chunk)))) {
        return 0;
      }
      this.token('JS', (script = match[0]).slice(1, -1), 0, script.length);
      return script.length;
    };

    Lexer.prototype.regexToken = function() {
      var closed, end, flags, index, match, prev, re, regex, tokens, _ref2, _ref3, _ref4;
      switch (false) {
        case !(match = REGEX_ILLEGAL.exec(this.chunk)):
          this.error("regular expressions cannot begin with " + match[2], match.index + match[1].length);
          break;
        case this.chunk.slice(0, 3) !== '///':
          _ref2 = this.matchWithInterpolations(this.chunk.slice(3), HEREGEX, '///', 3), tokens = _ref2.tokens, index = _ref2.index;
          break;
        case !(match = REGEX.exec(this.chunk)):
          regex = match[0], closed = match[1];
          index = regex.length;
          prev = last(this.tokens);
          if (prev) {
            if (prev.spaced && (_ref3 = prev[0], __indexOf.call(CALLABLE, _ref3) >= 0)) {
              if (!closed || POSSIBLY_DIVISION.test(regex)) {
                return 0;
              }
            } else if (_ref4 = prev[0], __indexOf.call(NOT_REGEX, _ref4) >= 0) {
              return 0;
            }
          }
          if (!closed) {
            this.error('missing / (unclosed regex)');
          }
          break;
        default:
          return 0;
      }
      flags = REGEX_FLAGS.exec(this.chunk.slice(index))[0];
      end = index + flags.length;
      switch (false) {
        case !!VALID_FLAGS.test(flags):
          this.error("invalid regular expression flags " + flags, index);
          break;
        case !regex:
          this.token('REGEX', "" + regex + flags);
          break;
        case tokens.length !== 1:
          re = this.formatHeregex(tokens[0][1]).replace(/\//g, '\\/');
          this.token('REGEX', "/" + (re || '(?:)') + "/" + flags);
          break;
        default:
          this.token('IDENTIFIER', 'RegExp', 0, 0);
          this.token('CALL_START', '(', 0, 0);
          this.mergeInterpolationTokens(tokens, {
            quote: '"',
            start: 3,
            end: end
          }, (function(_this) {
            return function(value) {
              return _this.formatHeregex(value).replace(/\\/g, '\\\\');
            };
          })(this));
          if (flags) {
            this.token(',', ',', index, 0);
            this.token('STRING', '"' + flags + '"', index, flags.length);
          }
          this.token(')', ')', end, 0);
      }
      return end;
    };

    Lexer.prototype.lineToken = function() {
      var diff, indent, match, noNewlines, size;
      if (!(match = MULTI_DENT.exec(this.chunk))) {
        return 0;
      }
      indent = match[0];
      this.seenFor = false;
      size = indent.length - 1 - indent.lastIndexOf('\n');
      noNewlines = this.unfinished();
      if (size - this.indebt === this.indent) {
        if (noNewlines) {
          this.suppressNewlines();
        } else {
          this.newlineToken(0);
        }
        return indent.length;
      }
      if (size > this.indent) {
        if (noNewlines) {
          this.indebt = size - this.indent;
          this.suppressNewlines();
          return indent.length;
        }
        if (!this.tokens.length) {
          this.baseIndent = this.indent = size;
          return indent.length;
        }
        diff = size - this.indent + this.outdebt;
        this.token('INDENT', diff, indent.length - size, size);
        this.indents.push(diff);
        this.ends.push({
          tag: 'OUTDENT'
        });
        this.outdebt = this.indebt = 0;
        this.indent = size;
      } else if (size < this.baseIndent) {
        this.error('missing indentation', indent.length);
      } else {
        this.indebt = 0;
        this.outdentToken(this.indent - size, noNewlines, indent.length);
      }
      return indent.length;
    };

    Lexer.prototype.outdentToken = function(moveOut, noNewlines, outdentLength) {
      var decreasedIndent, dent, lastIndent, _ref2;
      decreasedIndent = this.indent - moveOut;
      while (moveOut > 0) {
        lastIndent = this.indents[this.indents.length - 1];
        if (!lastIndent) {
          moveOut = 0;
        } else if (lastIndent === this.outdebt) {
          moveOut -= this.outdebt;
          this.outdebt = 0;
        } else if (lastIndent < this.outdebt) {
          this.outdebt -= lastIndent;
          moveOut -= lastIndent;
        } else {
          dent = this.indents.pop() + this.outdebt;
          if (outdentLength && (_ref2 = this.chunk[outdentLength], __indexOf.call(INDENTABLE_CLOSERS, _ref2) >= 0)) {
            decreasedIndent -= dent - moveOut;
            moveOut = dent;
          }
          this.outdebt = 0;
          this.pair('OUTDENT');
          this.token('OUTDENT', moveOut, 0, outdentLength);
          moveOut -= dent;
        }
      }
      if (dent) {
        this.outdebt -= moveOut;
      }
      while (this.value() === ';') {
        this.tokens.pop();
      }
      if (!(this.tag() === 'TERMINATOR' || noNewlines)) {
        this.token('TERMINATOR', '\n', outdentLength, 0);
      }
      this.indent = decreasedIndent;
      return this;
    };

    Lexer.prototype.whitespaceToken = function() {
      var match, nline, prev;
      if (!((match = WHITESPACE.exec(this.chunk)) || (nline = this.chunk.charAt(0) === '\n'))) {
        return 0;
      }
      prev = last(this.tokens);
      if (prev) {
        prev[match ? 'spaced' : 'newLine'] = true;
      }
      if (match) {
        return match[0].length;
      } else {
        return 0;
      }
    };

    Lexer.prototype.newlineToken = function(offset) {
      while (this.value() === ';') {
        this.tokens.pop();
      }
      if (this.tag() !== 'TERMINATOR') {
        this.token('TERMINATOR', '\n', offset, 0);
      }
      return this;
    };

    Lexer.prototype.suppressNewlines = function() {
      if (this.value() === '\\') {
        this.tokens.pop();
      }
      return this;
    };

    Lexer.prototype.literalToken = function() {
      var match, prev, tag, token, value, _ref2, _ref3, _ref4, _ref5;
      if (match = OPERATOR.exec(this.chunk)) {
        value = match[0];
        if (CODE.test(value)) {
          this.tagParameters();
        }
      } else {
        value = this.chunk.charAt(0);
      }
      tag = value;
      prev = last(this.tokens);
      if (value === '=' && prev) {
        if (!prev[1].reserved && (_ref2 = prev[1], __indexOf.call(JS_FORBIDDEN, _ref2) >= 0)) {
          this.error("reserved word \"" + (this.value()) + "\" can't be assigned");
        }
        if ((_ref3 = prev[1]) === '||' || _ref3 === '&&') {
          prev[0] = 'COMPOUND_ASSIGN';
          prev[1] += '=';
          return value.length;
        }
      }
      if (value === ';') {
        this.seenFor = false;
        tag = 'TERMINATOR';
      } else if (__indexOf.call(MATH, value) >= 0) {
        tag = 'MATH';
      } else if (__indexOf.call(COMPARE, value) >= 0) {
        tag = 'COMPARE';
      } else if (__indexOf.call(COMPOUND_ASSIGN, value) >= 0) {
        tag = 'COMPOUND_ASSIGN';
      } else if (__indexOf.call(UNARY, value) >= 0) {
        tag = 'UNARY';
      } else if (__indexOf.call(UNARY_MATH, value) >= 0) {
        tag = 'UNARY_MATH';
      } else if (__indexOf.call(SHIFT, value) >= 0) {
        tag = 'SHIFT';
      } else if (__indexOf.call(LOGIC, value) >= 0 || value === '?' && (prev != null ? prev.spaced : void 0)) {
        tag = 'LOGIC';
      } else if (prev && !prev.spaced) {
        if (value === '(' && (_ref4 = prev[0], __indexOf.call(CALLABLE, _ref4) >= 0)) {
          if (prev[0] === '?') {
            prev[0] = 'FUNC_EXIST';
          }
          tag = 'CALL_START';
        } else if (value === '[' && (_ref5 = prev[0], __indexOf.call(INDEXABLE, _ref5) >= 0)) {
          tag = 'INDEX_START';
          switch (prev[0]) {
            case '?':
              prev[0] = 'INDEX_SOAK';
          }
        }
      }
      token = this.makeToken(tag, value);
      switch (value) {
        case '(':
        case '{':
        case '[':
          this.ends.push({
            tag: INVERSES[value],
            origin: token
          });
          break;
        case ')':
        case '}':
        case ']':
          this.pair(value);
      }
      this.tokens.push(token);
      return value.length;
    };

    Lexer.prototype.tagParameters = function() {
      var i, stack, tok, tokens;
      if (this.tag() !== ')') {
        return this;
      }
      stack = [];
      tokens = this.tokens;
      i = tokens.length;
      tokens[--i][0] = 'PARAM_END';
      while (tok = tokens[--i]) {
        switch (tok[0]) {
          case ')':
            stack.push(tok);
            break;
          case '(':
          case 'CALL_START':
            if (stack.length) {
              stack.pop();
            } else if (tok[0] === '(') {
              tok[0] = 'PARAM_START';
              return this;
            } else {
              return this;
            }
        }
      }
      return this;
    };

    Lexer.prototype.closeIndentation = function() {
      return this.outdentToken(this.indent);
    };

    Lexer.prototype.matchWithInterpolations = function(str, regex, end, offsetInChunk) {
      var column, index, line, nested, strPart, tokens, _ref2, _ref3, _ref4;
      tokens = [];
      while (true) {
        strPart = regex.exec(str)[0];
        tokens.push(this.makeToken('NEOSTRING', strPart, offsetInChunk));
        str = str.slice(strPart.length);
        offsetInChunk += strPart.length;
        if (str.slice(0, 2) !== '#{') {
          break;
        }
        _ref2 = this.getLineAndColumnFromChunk(offsetInChunk + 1), line = _ref2[0], column = _ref2[1];
        _ref3 = new Lexer().tokenize(str.slice(1), {
          line: line,
          column: column,
          untilBalanced: true
        }), nested = _ref3.tokens, index = _ref3.index;
        index += 1;
        nested.shift();
        nested.pop();
        if (((_ref4 = nested[0]) != null ? _ref4[0] : void 0) === 'TERMINATOR') {
          nested.shift();
        }
        if (nested.length > 1) {
          nested.unshift(this.makeToken('(', '(', offsetInChunk + 1, 0));
          nested.push(this.makeToken(')', ')', offsetInChunk + 1 + index, 0));
        }
        tokens.push(['TOKENS', nested]);
        str = str.slice(index);
        offsetInChunk += index;
      }
      if (str.slice(0, end.length) !== end) {
        this.error("missing " + end);
      }
      return {
        tokens: tokens,
        index: offsetInChunk + end.length
      };
    };

    Lexer.prototype.mergeInterpolationTokens = function(tokens, _arg, fn) {
      var converted, end, errorToken, firstEmptyStringIndex, firstIndex, i, interpolated, locationToken, plusToken, quote, rparen, start, tag, token, tokensToPush, value, _i, _len, _ref2;
      quote = _arg.quote, start = _arg.start, end = _arg.end;
      if (interpolated = tokens.length > 1) {
        errorToken = this.makeToken('', 'interpolation', start + tokens[0][1].length, 2);
        this.token('(', '(', 0, 0, errorToken);
      }
      firstIndex = this.tokens.length;
      for (i = _i = 0, _len = tokens.length; _i < _len; i = ++_i) {
        token = tokens[i];
        tag = token[0], value = token[1];
        switch (tag) {
          case 'TOKENS':
            if (value.length === 0) {
              continue;
            }
            locationToken = value[0];
            tokensToPush = value;
            break;
          case 'NEOSTRING':
            converted = fn(token[1], i);
            if (converted.length === 0) {
              if (i === 0) {
                firstEmptyStringIndex = this.tokens.length;
              } else {
                continue;
              }
            }
            if (i === 2 && (firstEmptyStringIndex != null)) {
              this.tokens.splice(firstEmptyStringIndex, 2);
            }
            token[0] = 'STRING';
            token[1] = this.makeString(converted, quote);
            locationToken = token;
            tokensToPush = [token];
        }
        if (this.tokens.length > firstIndex) {
          plusToken = this.token('+', '+');
          plusToken[2] = {
            first_line: locationToken[2].first_line,
            first_column: locationToken[2].first_column,
            last_line: locationToken[2].first_line,
            last_column: locationToken[2].first_column
          };
        }
        (_ref2 = this.tokens).push.apply(_ref2, tokensToPush);
      }
      if (interpolated) {
        rparen = this.token(')', ')', end, 0);
        return rparen.stringEnd = true;
      }
    };

    Lexer.prototype.pair = function(tag) {
      var wanted, _ref2;
      if (tag !== (wanted = (_ref2 = last(this.ends)) != null ? _ref2.tag : void 0)) {
        if ('OUTDENT' !== wanted) {
          this.error("unmatched " + tag);
        }
        this.outdentToken(last(this.indents), true);
        return this.pair(tag);
      }
      return this.ends.pop();
    };

    Lexer.prototype.getLineAndColumnFromChunk = function(offset) {
      var column, lineCount, lines, string;
      if (offset === 0) {
        return [this.chunkLine, this.chunkColumn];
      }
      if (offset >= this.chunk.length) {
        string = this.chunk;
      } else {
        string = this.chunk.slice(0, +(offset - 1) + 1 || 9e9);
      }
      lineCount = count(string, '\n');
      column = this.chunkColumn;
      if (lineCount > 0) {
        lines = string.split('\n');
        column = last(lines).length;
      } else {
        column += string.length;
      }
      return [this.chunkLine + lineCount, column];
    };

    Lexer.prototype.makeToken = function(tag, value, offsetInChunk, length) {
      var lastCharacter, locationData, token, _ref2, _ref3;
      if (offsetInChunk == null) {
        offsetInChunk = 0;
      }
      if (length == null) {
        length = value.length;
      }
      locationData = {};
      _ref2 = this.getLineAndColumnFromChunk(offsetInChunk), locationData.first_line = _ref2[0], locationData.first_column = _ref2[1];
      lastCharacter = Math.max(0, length - 1);
      _ref3 = this.getLineAndColumnFromChunk(offsetInChunk + lastCharacter), locationData.last_line = _ref3[0], locationData.last_column = _ref3[1];
      token = [tag, value, locationData];
      return token;
    };

    Lexer.prototype.token = function(tag, value, offsetInChunk, length, origin) {
      var token;
      token = this.makeToken(tag, value, offsetInChunk, length);
      if (origin) {
        token.origin = origin;
      }
      this.tokens.push(token);
      return token;
    };

    Lexer.prototype.tag = function(index, tag) {
      var tok;
      return (tok = last(this.tokens, index)) && (tag ? tok[0] = tag : tok[0]);
    };

    Lexer.prototype.value = function(index, val) {
      var tok;
      return (tok = last(this.tokens, index)) && (val ? tok[1] = val : tok[1]);
    };

    Lexer.prototype.unfinished = function() {
      var _ref2;
      return LINE_CONTINUER.test(this.chunk) || ((_ref2 = this.tag()) === '\\' || _ref2 === '.' || _ref2 === '?.' || _ref2 === '?::' || _ref2 === 'UNARY' || _ref2 === 'MATH' || _ref2 === 'UNARY_MATH' || _ref2 === '+' || _ref2 === '-' || _ref2 === 'YIELD' || _ref2 === '**' || _ref2 === 'SHIFT' || _ref2 === 'RELATION' || _ref2 === 'COMPARE' || _ref2 === 'LOGIC' || _ref2 === 'THROW' || _ref2 === 'EXTENDS');
    };

    Lexer.prototype.formatString = function(str) {
      return str.replace(/\\[^\S\n]*(\n|\\)\s*/g, function(escaped, character) {
        if (character === '\n') {
          return '';
        } else {
          return escaped;
        }
      });
    };

    Lexer.prototype.formatHeregex = function(str) {
      return str.replace(HEREGEX_OMIT, '$1$2').replace(MULTILINER, '\\n');
    };

    Lexer.prototype.makeString = function(body, quote) {
      var match;
      if (!body) {
        return quote + quote;
      }
      body = body.replace(RegExp("\\\\(" + quote + "|\\\\)", "g"), function(match, contents) {
        if (contents === quote) {
          return contents;
        } else {
          return match;
        }
      });
      body = body.replace(RegExp("" + quote, "g"), '\\$&');
      if (match = OCTAL_ESCAPE.exec(body)) {
        this.error("octal escape sequences are not allowed " + match[2], match.index + match[1].length + 1);
      }
      return quote + body + quote;
    };

    Lexer.prototype.error = function(message, offset) {
      var first_column, first_line, _ref2;
      if (offset == null) {
        offset = 0;
      }
      _ref2 = this.getLineAndColumnFromChunk(offset), first_line = _ref2[0], first_column = _ref2[1];
      return throwSyntaxError(message, {
        first_line: first_line,
        first_column: first_column
      });
    };

    return Lexer;

  })();

  JS_KEYWORDS = ['true', 'false', 'null', 'this', 'new', 'delete', 'typeof', 'in', 'instanceof', 'return', 'throw', 'break', 'continue', 'debugger', 'yield', 'if', 'else', 'switch', 'for', 'while', 'do', 'try', 'catch', 'finally', 'class', 'extends', 'super'];

  COFFEE_KEYWORDS = ['undefined', 'then', 'unless', 'until', 'loop', 'of', 'by', 'when'];

  COFFEE_ALIAS_MAP = {
    and: '&&',
    or: '||',
    is: '==',
    isnt: '!=',
    not: '!',
    yes: 'true',
    no: 'false',
    on: 'true',
    off: 'false'
  };

  COFFEE_ALIASES = (function() {
    var _results;
    _results = [];
    for (key in COFFEE_ALIAS_MAP) {
      _results.push(key);
    }
    return _results;
  })();

  COFFEE_KEYWORDS = COFFEE_KEYWORDS.concat(COFFEE_ALIASES);

  RESERVED = ['case', 'default', 'function', 'var', 'void', 'with', 'const', 'let', 'enum', 'export', 'import', 'native', 'implements', 'interface', 'package', 'private', 'protected', 'public', 'static'];

  STRICT_PROSCRIBED = ['arguments', 'eval', 'yield*'];

  JS_FORBIDDEN = JS_KEYWORDS.concat(RESERVED).concat(STRICT_PROSCRIBED);

  exports.RESERVED = RESERVED.concat(JS_KEYWORDS).concat(COFFEE_KEYWORDS).concat(STRICT_PROSCRIBED);

  exports.STRICT_PROSCRIBED = STRICT_PROSCRIBED;

  BOM = 65279;

  IDENTIFIER = /^(?!\d)((?:(?!\s)[$\w\x7f-\uffff])+)([^\n\S]*:(?!:))?/;

  NUMBER = /^0b[01]+|^0o[0-7]+|^0x[\da-f]+|^\d*\.?\d+(?:e[+-]?\d+)?/i;

  OPERATOR = /^(?:[-=]>|[-+*\/%<>&|^!?=]=|>>>=?|([-+:])\1|([&|<>*\/%])\2=?|\?(\.|::)|\.{2,3})/;

  WHITESPACE = /^[^\n\S]+/;

  COMMENT = /^###([^#][\s\S]*?)(?:###[^\n\S]*|###$)|^(?:\s*#(?!##[^#]).*)+/;

  CODE = /^[-=]>/;

  MULTI_DENT = /^(?:\n[^\n\S]*)+/;

  JSTOKEN = /^`[^\\`]*(?:\\.[^\\`]*)*`/;

  STRING_START = /^(?:'''|"""|'|")/;

  STRING_SINGLE = /^(?:[^\\']|\\[\s\S])*/;

  STRING_DOUBLE = /^(?:[^\\"#]|\\[\s\S]|\#(?!\{))*/;

  HEREDOC_SINGLE = /^(?:[^\\']|\\[\s\S]|'(?!''))*/;

  HEREDOC_DOUBLE = /^(?:[^\\"#]|\\[\s\S]|"(?!"")|\#(?!\{))*/;

  STRING_OMIT = /\s*\n\s*/g;

  HEREDOC_INDENT = /\n+([^\n\S]*)(?=\S)/g;

  REGEX = /^\/(?!\/)(?:[^[\/\n\\]|\\.|\[(?:\\.|[^\]\n\\])*])*(\/)?/;

  REGEX_FLAGS = /^\w*/;

  VALID_FLAGS = /^(?!.*(.).*\1)[imgy]*$/;

  HEREGEX = /^(?:[^\\\/#]|\\[\s\S]|\/(?!\/\/)|\#(?!\{))*/;

  HEREGEX_OMIT = /((?:\\\\)+)|\\(\s|\/)|\s+(?:#.*)?/g;

  REGEX_ILLEGAL = /^(\/|\/{3}\s*)(\*)/;

  POSSIBLY_DIVISION = /^\/=?\s/;

  MULTILINER = /\n/g;

  HERECOMMENT_ILLEGAL = /\*\//;

  LINE_CONTINUER = /^\s*(?:,|\??\.(?![.\d])|::)/;

  OCTAL_ESCAPE = /^((?:\\.|[^\\])*)(\\(?:0[0-7]|[1-7]))/;

  LEADING_BLANK_LINE = /^[^\n\S]*\n/;

  TRAILING_BLANK_LINE = /\n[^\n\S]*$/;

  TRAILING_SPACES = /\s+$/;

  COMPOUND_ASSIGN = ['-=', '+=', '/=', '*=', '%=', '||=', '&&=', '?=', '<<=', '>>=', '>>>=', '&=', '^=', '|=', '**=', '//=', '%%='];

  UNARY = ['NEW', 'TYPEOF', 'DELETE', 'DO'];

  UNARY_MATH = ['!', '~'];

  LOGIC = ['&&', '||', '&', '|', '^'];

  SHIFT = ['<<', '>>', '>>>'];

  COMPARE = ['==', '!=', '<', '>', '<=', '>='];

  MATH = ['*', '/', '%', '//', '%%'];

  RELATION = ['IN', 'OF', 'INSTANCEOF'];

  BOOL = ['TRUE', 'FALSE'];

  CALLABLE = ['IDENTIFIER', ')', ']', '?', '@', 'THIS', 'SUPER'];

  INDEXABLE = CALLABLE.concat(['NUMBER', 'STRING', 'REGEX', 'BOOL', 'NULL', 'UNDEFINED', '}', '::']);

  NOT_REGEX = INDEXABLE.concat(['++', '--']);

  LINE_BREAK = ['INDENT', 'OUTDENT', 'TERMINATOR'];

  INDENTABLE_CLOSERS = [')', '}', ']'];

}).call(this);