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From anovi...@apache.org
Subject [18/52] [partial] incubator-ignite git commit: # ignite-843 WIP.
Date Fri, 08 May 2015 11:36:43 GMT
http://git-wip-us.apache.org/repos/asf/incubator-ignite/blob/0ef79031/modules/webconfig/nodejs/node_modules/jade/node_modules/constantinople/node_modules/acorn-globals/node_modules/acorn/dist/acorn_csp.js
----------------------------------------------------------------------
diff --git a/modules/webconfig/nodejs/node_modules/jade/node_modules/constantinople/node_modules/acorn-globals/node_modules/acorn/dist/acorn_csp.js b/modules/webconfig/nodejs/node_modules/jade/node_modules/constantinople/node_modules/acorn-globals/node_modules/acorn/dist/acorn_csp.js
new file mode 100644
index 0000000..bbfd67c
--- /dev/null
+++ b/modules/webconfig/nodejs/node_modules/jade/node_modules/constantinople/node_modules/acorn-globals/node_modules/acorn/dist/acorn_csp.js
@@ -0,0 +1,3179 @@
+(function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g.acorn = f()}})(function(){var define,module,exports;return (function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(_dereq_,module,exports){
+
+
+// The main exported interface (under `self.acorn` when in the
+// browser) is a `parse` function that takes a code string and
+// returns an abstract syntax tree as specified by [Mozilla parser
+// API][api].
+//
+// [api]: https://developer.mozilla.org/en-US/docs/SpiderMonkey/Parser_API
+
+"use strict";
+
+exports.parse = parse;
+
+// This function tries to parse a single expression at a given
+// offset in a string. Useful for parsing mixed-language formats
+// that embed JavaScript expressions.
+
+exports.parseExpressionAt = parseExpressionAt;
+
+// Acorn is organized as a tokenizer and a recursive-descent parser.
+// The `tokenize` export provides an interface to the tokenizer.
+
+exports.tokenizer = tokenizer;
+exports.__esModule = true;
+// Acorn is a tiny, fast JavaScript parser written in JavaScript.
+//
+// Acorn was written by Marijn Haverbeke, Ingvar Stepanyan, and
+// various contributors and released under an MIT license.
+//
+// Git repositories for Acorn are available at
+//
+//     http://marijnhaverbeke.nl/git/acorn
+//     https://github.com/marijnh/acorn.git
+//
+// Please use the [github bug tracker][ghbt] to report issues.
+//
+// [ghbt]: https://github.com/marijnh/acorn/issues
+//
+// This file defines the main parser interface. The library also comes
+// with a [error-tolerant parser][dammit] and an
+// [abstract syntax tree walker][walk], defined in other files.
+//
+// [dammit]: acorn_loose.js
+// [walk]: util/walk.js
+
+var _state = _dereq_("./state");
+
+var Parser = _state.Parser;
+
+var _options = _dereq_("./options");
+
+var getOptions = _options.getOptions;
+
+_dereq_("./parseutil");
+
+_dereq_("./statement");
+
+_dereq_("./lval");
+
+_dereq_("./expression");
+
+exports.Parser = _state.Parser;
+exports.plugins = _state.plugins;
+exports.defaultOptions = _options.defaultOptions;
+
+var _location = _dereq_("./location");
+
+exports.SourceLocation = _location.SourceLocation;
+exports.getLineInfo = _location.getLineInfo;
+exports.Node = _dereq_("./node").Node;
+
+var _tokentype = _dereq_("./tokentype");
+
+exports.TokenType = _tokentype.TokenType;
+exports.tokTypes = _tokentype.types;
+
+var _tokencontext = _dereq_("./tokencontext");
+
+exports.TokContext = _tokencontext.TokContext;
+exports.tokContexts = _tokencontext.types;
+
+var _identifier = _dereq_("./identifier");
+
+exports.isIdentifierChar = _identifier.isIdentifierChar;
+exports.isIdentifierStart = _identifier.isIdentifierStart;
+exports.Token = _dereq_("./tokenize").Token;
+
+var _whitespace = _dereq_("./whitespace");
+
+exports.isNewLine = _whitespace.isNewLine;
+exports.lineBreak = _whitespace.lineBreak;
+exports.lineBreakG = _whitespace.lineBreakG;
+var version = "1.0.3";exports.version = version;
+
+function parse(input, options) {
+  var p = parser(options, input);
+  var startPos = p.options.locations ? [p.pos, p.curPosition()] : p.pos;
+  p.nextToken();
+  return p.parseTopLevel(p.options.program || p.startNodeAt(startPos));
+}
+
+function parseExpressionAt(input, pos, options) {
+  var p = parser(options, input, pos);
+  p.nextToken();
+  return p.parseExpression();
+}
+
+function tokenizer(input, options) {
+  return parser(options, input);
+}
+
+function parser(options, input) {
+  return new Parser(getOptions(options), String(input));
+}
+
+},{"./expression":2,"./identifier":3,"./location":4,"./lval":5,"./node":6,"./options":7,"./parseutil":8,"./state":9,"./statement":10,"./tokencontext":11,"./tokenize":12,"./tokentype":13,"./whitespace":15}],2:[function(_dereq_,module,exports){
+// A recursive descent parser operates by defining functions for all
+// syntactic elements, and recursively calling those, each function
+// advancing the input stream and returning an AST node. Precedence
+// of constructs (for example, the fact that `!x[1]` means `!(x[1])`
+// instead of `(!x)[1]` is handled by the fact that the parser
+// function that parses unary prefix operators is called first, and
+// in turn calls the function that parses `[]` subscripts — that
+// way, it'll receive the node for `x[1]` already parsed, and wraps
+// *that* in the unary operator node.
+//
+// Acorn uses an [operator precedence parser][opp] to handle binary
+// operator precedence, because it is much more compact than using
+// the technique outlined above, which uses different, nesting
+// functions to specify precedence, for all of the ten binary
+// precedence levels that JavaScript defines.
+//
+// [opp]: http://en.wikipedia.org/wiki/Operator-precedence_parser
+
+"use strict";
+
+var tt = _dereq_("./tokentype").types;
+
+var Parser = _dereq_("./state").Parser;
+
+var reservedWords = _dereq_("./identifier").reservedWords;
+
+var has = _dereq_("./util").has;
+
+var pp = Parser.prototype;
+
+// Check if property name clashes with already added.
+// Object/class getters and setters are not allowed to clash —
+// either with each other or with an init property — and in
+// strict mode, init properties are also not allowed to be repeated.
+
+pp.checkPropClash = function (prop, propHash) {
+  if (this.options.ecmaVersion >= 6) return;
+  var key = prop.key,
+      name = undefined;
+  switch (key.type) {
+    case "Identifier":
+      name = key.name;break;
+    case "Literal":
+      name = String(key.value);break;
+    default:
+      return;
+  }
+  var kind = prop.kind || "init",
+      other = undefined;
+  if (has(propHash, name)) {
+    other = propHash[name];
+    var isGetSet = kind !== "init";
+    if ((this.strict || isGetSet) && other[kind] || !(isGetSet ^ other.init)) this.raise(key.start, "Redefinition of property");
+  } else {
+    other = propHash[name] = {
+      init: false,
+      get: false,
+      set: false
+    };
+  }
+  other[kind] = true;
+};
+
+// ### Expression parsing
+
+// These nest, from the most general expression type at the top to
+// 'atomic', nondivisible expression types at the bottom. Most of
+// the functions will simply let the function(s) below them parse,
+// and, *if* the syntactic construct they handle is present, wrap
+// the AST node that the inner parser gave them in another node.
+
+// Parse a full expression. The optional arguments are used to
+// forbid the `in` operator (in for loops initalization expressions)
+// and provide reference for storing '=' operator inside shorthand
+// property assignment in contexts where both object expression
+// and object pattern might appear (so it's possible to raise
+// delayed syntax error at correct position).
+
+pp.parseExpression = function (noIn, refShorthandDefaultPos) {
+  var start = this.markPosition();
+  var expr = this.parseMaybeAssign(noIn, refShorthandDefaultPos);
+  if (this.type === tt.comma) {
+    var node = this.startNodeAt(start);
+    node.expressions = [expr];
+    while (this.eat(tt.comma)) node.expressions.push(this.parseMaybeAssign(noIn, refShorthandDefaultPos));
+    return this.finishNode(node, "SequenceExpression");
+  }
+  return expr;
+};
+
+// Parse an assignment expression. This includes applications of
+// operators like `+=`.
+
+pp.parseMaybeAssign = function (noIn, refShorthandDefaultPos) {
+  if (this.type == tt._yield && this.inGenerator) return this.parseYield();
+
+  var failOnShorthandAssign = undefined;
+  if (!refShorthandDefaultPos) {
+    refShorthandDefaultPos = { start: 0 };
+    failOnShorthandAssign = true;
+  } else {
+    failOnShorthandAssign = false;
+  }
+  var start = this.markPosition();
+  var left = this.parseMaybeConditional(noIn, refShorthandDefaultPos);
+  if (this.type.isAssign) {
+    var node = this.startNodeAt(start);
+    node.operator = this.value;
+    node.left = this.type === tt.eq ? this.toAssignable(left) : left;
+    refShorthandDefaultPos.start = 0; // reset because shorthand default was used correctly
+    this.checkLVal(left);
+    this.next();
+    node.right = this.parseMaybeAssign(noIn);
+    return this.finishNode(node, "AssignmentExpression");
+  } else if (failOnShorthandAssign && refShorthandDefaultPos.start) {
+    this.unexpected(refShorthandDefaultPos.start);
+  }
+  return left;
+};
+
+// Parse a ternary conditional (`?:`) operator.
+
+pp.parseMaybeConditional = function (noIn, refShorthandDefaultPos) {
+  var start = this.markPosition();
+  var expr = this.parseExprOps(noIn, refShorthandDefaultPos);
+  if (refShorthandDefaultPos && refShorthandDefaultPos.start) return expr;
+  if (this.eat(tt.question)) {
+    var node = this.startNodeAt(start);
+    node.test = expr;
+    node.consequent = this.parseMaybeAssign();
+    this.expect(tt.colon);
+    node.alternate = this.parseMaybeAssign(noIn);
+    return this.finishNode(node, "ConditionalExpression");
+  }
+  return expr;
+};
+
+// Start the precedence parser.
+
+pp.parseExprOps = function (noIn, refShorthandDefaultPos) {
+  var start = this.markPosition();
+  var expr = this.parseMaybeUnary(refShorthandDefaultPos);
+  if (refShorthandDefaultPos && refShorthandDefaultPos.start) return expr;
+  return this.parseExprOp(expr, start, -1, noIn);
+};
+
+// Parse binary operators with the operator precedence parsing
+// algorithm. `left` is the left-hand side of the operator.
+// `minPrec` provides context that allows the function to stop and
+// defer further parser to one of its callers when it encounters an
+// operator that has a lower precedence than the set it is parsing.
+
+pp.parseExprOp = function (left, leftStart, minPrec, noIn) {
+  var prec = this.type.binop;
+  if (prec != null && (!noIn || this.type !== tt._in)) {
+    if (prec > minPrec) {
+      var node = this.startNodeAt(leftStart);
+      node.left = left;
+      node.operator = this.value;
+      var op = this.type;
+      this.next();
+      var start = this.markPosition();
+      node.right = this.parseExprOp(this.parseMaybeUnary(), start, prec, noIn);
+      this.finishNode(node, op === tt.logicalOR || op === tt.logicalAND ? "LogicalExpression" : "BinaryExpression");
+      return this.parseExprOp(node, leftStart, minPrec, noIn);
+    }
+  }
+  return left;
+};
+
+// Parse unary operators, both prefix and postfix.
+
+pp.parseMaybeUnary = function (refShorthandDefaultPos) {
+  if (this.type.prefix) {
+    var node = this.startNode(),
+        update = this.type === tt.incDec;
+    node.operator = this.value;
+    node.prefix = true;
+    this.next();
+    node.argument = this.parseMaybeUnary();
+    if (refShorthandDefaultPos && refShorthandDefaultPos.start) this.unexpected(refShorthandDefaultPos.start);
+    if (update) this.checkLVal(node.argument);else if (this.strict && node.operator === "delete" && node.argument.type === "Identifier") this.raise(node.start, "Deleting local variable in strict mode");
+    return this.finishNode(node, update ? "UpdateExpression" : "UnaryExpression");
+  }
+  var start = this.markPosition();
+  var expr = this.parseExprSubscripts(refShorthandDefaultPos);
+  if (refShorthandDefaultPos && refShorthandDefaultPos.start) return expr;
+  while (this.type.postfix && !this.canInsertSemicolon()) {
+    var node = this.startNodeAt(start);
+    node.operator = this.value;
+    node.prefix = false;
+    node.argument = expr;
+    this.checkLVal(expr);
+    this.next();
+    expr = this.finishNode(node, "UpdateExpression");
+  }
+  return expr;
+};
+
+// Parse call, dot, and `[]`-subscript expressions.
+
+pp.parseExprSubscripts = function (refShorthandDefaultPos) {
+  var start = this.markPosition();
+  var expr = this.parseExprAtom(refShorthandDefaultPos);
+  if (refShorthandDefaultPos && refShorthandDefaultPos.start) return expr;
+  return this.parseSubscripts(expr, start);
+};
+
+pp.parseSubscripts = function (base, start, noCalls) {
+  if (this.eat(tt.dot)) {
+    var node = this.startNodeAt(start);
+    node.object = base;
+    node.property = this.parseIdent(true);
+    node.computed = false;
+    return this.parseSubscripts(this.finishNode(node, "MemberExpression"), start, noCalls);
+  } else if (this.eat(tt.bracketL)) {
+    var node = this.startNodeAt(start);
+    node.object = base;
+    node.property = this.parseExpression();
+    node.computed = true;
+    this.expect(tt.bracketR);
+    return this.parseSubscripts(this.finishNode(node, "MemberExpression"), start, noCalls);
+  } else if (!noCalls && this.eat(tt.parenL)) {
+    var node = this.startNodeAt(start);
+    node.callee = base;
+    node.arguments = this.parseExprList(tt.parenR, false);
+    return this.parseSubscripts(this.finishNode(node, "CallExpression"), start, noCalls);
+  } else if (this.type === tt.backQuote) {
+    var node = this.startNodeAt(start);
+    node.tag = base;
+    node.quasi = this.parseTemplate();
+    return this.parseSubscripts(this.finishNode(node, "TaggedTemplateExpression"), start, noCalls);
+  }return base;
+};
+
+// Parse an atomic expression — either a single token that is an
+// expression, an expression started by a keyword like `function` or
+// `new`, or an expression wrapped in punctuation like `()`, `[]`,
+// or `{}`.
+
+pp.parseExprAtom = function (refShorthandDefaultPos) {
+  var node = undefined;
+  switch (this.type) {
+    case tt._this:
+    case tt._super:
+      var type = this.type === tt._this ? "ThisExpression" : "Super";
+      node = this.startNode();
+      this.next();
+      return this.finishNode(node, type);
+
+    case tt._yield:
+      if (this.inGenerator) this.unexpected();
+
+    case tt.name:
+      var start = this.markPosition();
+      var id = this.parseIdent(this.type !== tt.name);
+      if (!this.canInsertSemicolon() && this.eat(tt.arrow)) {
+        return this.parseArrowExpression(this.startNodeAt(start), [id]);
+      }
+      return id;
+
+    case tt.regexp:
+      var value = this.value;
+      node = this.parseLiteral(value.value);
+      node.regex = { pattern: value.pattern, flags: value.flags };
+      return node;
+
+    case tt.num:case tt.string:
+      return this.parseLiteral(this.value);
+
+    case tt._null:case tt._true:case tt._false:
+      node = this.startNode();
+      node.value = this.type === tt._null ? null : this.type === tt._true;
+      node.raw = this.type.keyword;
+      this.next();
+      return this.finishNode(node, "Literal");
+
+    case tt.parenL:
+      return this.parseParenAndDistinguishExpression();
+
+    case tt.bracketL:
+      node = this.startNode();
+      this.next();
+      // check whether this is array comprehension or regular array
+      if (this.options.ecmaVersion >= 7 && this.type === tt._for) {
+        return this.parseComprehension(node, false);
+      }
+      node.elements = this.parseExprList(tt.bracketR, true, true, refShorthandDefaultPos);
+      return this.finishNode(node, "ArrayExpression");
+
+    case tt.braceL:
+      return this.parseObj(false, refShorthandDefaultPos);
+
+    case tt._function:
+      node = this.startNode();
+      this.next();
+      return this.parseFunction(node, false);
+
+    case tt._class:
+      return this.parseClass(this.startNode(), false);
+
+    case tt._new:
+      return this.parseNew();
+
+    case tt.backQuote:
+      return this.parseTemplate();
+
+    default:
+      this.unexpected();
+  }
+};
+
+pp.parseLiteral = function (value) {
+  var node = this.startNode();
+  node.value = value;
+  node.raw = this.input.slice(this.start, this.end);
+  this.next();
+  return this.finishNode(node, "Literal");
+};
+
+pp.parseParenExpression = function () {
+  this.expect(tt.parenL);
+  var val = this.parseExpression();
+  this.expect(tt.parenR);
+  return val;
+};
+
+pp.parseParenAndDistinguishExpression = function () {
+  var start = this.markPosition(),
+      val = undefined;
+  if (this.options.ecmaVersion >= 6) {
+    this.next();
+
+    if (this.options.ecmaVersion >= 7 && this.type === tt._for) {
+      return this.parseComprehension(this.startNodeAt(start), true);
+    }
+
+    var innerStart = this.markPosition(),
+        exprList = [],
+        first = true;
+    var refShorthandDefaultPos = { start: 0 },
+        spreadStart = undefined,
+        innerParenStart = undefined;
+    while (this.type !== tt.parenR) {
+      first ? first = false : this.expect(tt.comma);
+      if (this.type === tt.ellipsis) {
+        spreadStart = this.start;
+        exprList.push(this.parseRest());
+        break;
+      } else {
+        if (this.type === tt.parenL && !innerParenStart) {
+          innerParenStart = this.start;
+        }
+        exprList.push(this.parseMaybeAssign(false, refShorthandDefaultPos));
+      }
+    }
+    var innerEnd = this.markPosition();
+    this.expect(tt.parenR);
+
+    if (!this.canInsertSemicolon() && this.eat(tt.arrow)) {
+      if (innerParenStart) this.unexpected(innerParenStart);
+      return this.parseArrowExpression(this.startNodeAt(start), exprList);
+    }
+
+    if (!exprList.length) this.unexpected(this.lastTokStart);
+    if (spreadStart) this.unexpected(spreadStart);
+    if (refShorthandDefaultPos.start) this.unexpected(refShorthandDefaultPos.start);
+
+    if (exprList.length > 1) {
+      val = this.startNodeAt(innerStart);
+      val.expressions = exprList;
+      this.finishNodeAt(val, "SequenceExpression", innerEnd);
+    } else {
+      val = exprList[0];
+    }
+  } else {
+    val = this.parseParenExpression();
+  }
+
+  if (this.options.preserveParens) {
+    var par = this.startNodeAt(start);
+    par.expression = val;
+    return this.finishNode(par, "ParenthesizedExpression");
+  } else {
+    return val;
+  }
+};
+
+// New's precedence is slightly tricky. It must allow its argument
+// to be a `[]` or dot subscript expression, but not a call — at
+// least, not without wrapping it in parentheses. Thus, it uses the
+
+var empty = [];
+
+pp.parseNew = function () {
+  var node = this.startNode();
+  var meta = this.parseIdent(true);
+  if (this.options.ecmaVersion >= 6 && this.eat(tt.dot)) {
+    node.meta = meta;
+    node.property = this.parseIdent(true);
+    if (node.property.name !== "target") this.raise(node.property.start, "The only valid meta property for new is new.target");
+    return this.finishNode(node, "MetaProperty");
+  }
+  var start = this.markPosition();
+  node.callee = this.parseSubscripts(this.parseExprAtom(), start, true);
+  if (this.eat(tt.parenL)) node.arguments = this.parseExprList(tt.parenR, false);else node.arguments = empty;
+  return this.finishNode(node, "NewExpression");
+};
+
+// Parse template expression.
+
+pp.parseTemplateElement = function () {
+  var elem = this.startNode();
+  elem.value = {
+    raw: this.input.slice(this.start, this.end),
+    cooked: this.value
+  };
+  this.next();
+  elem.tail = this.type === tt.backQuote;
+  return this.finishNode(elem, "TemplateElement");
+};
+
+pp.parseTemplate = function () {
+  var node = this.startNode();
+  this.next();
+  node.expressions = [];
+  var curElt = this.parseTemplateElement();
+  node.quasis = [curElt];
+  while (!curElt.tail) {
+    this.expect(tt.dollarBraceL);
+    node.expressions.push(this.parseExpression());
+    this.expect(tt.braceR);
+    node.quasis.push(curElt = this.parseTemplateElement());
+  }
+  this.next();
+  return this.finishNode(node, "TemplateLiteral");
+};
+
+// Parse an object literal or binding pattern.
+
+pp.parseObj = function (isPattern, refShorthandDefaultPos) {
+  var node = this.startNode(),
+      first = true,
+      propHash = {};
+  node.properties = [];
+  this.next();
+  while (!this.eat(tt.braceR)) {
+    if (!first) {
+      this.expect(tt.comma);
+      if (this.afterTrailingComma(tt.braceR)) break;
+    } else first = false;
+
+    var prop = this.startNode(),
+        isGenerator = undefined,
+        start = undefined;
+    if (this.options.ecmaVersion >= 6) {
+      prop.method = false;
+      prop.shorthand = false;
+      if (isPattern || refShorthandDefaultPos) start = this.markPosition();
+      if (!isPattern) isGenerator = this.eat(tt.star);
+    }
+    this.parsePropertyName(prop);
+    if (this.eat(tt.colon)) {
+      prop.value = isPattern ? this.parseMaybeDefault() : this.parseMaybeAssign(false, refShorthandDefaultPos);
+      prop.kind = "init";
+    } else if (this.options.ecmaVersion >= 6 && this.type === tt.parenL) {
+      if (isPattern) this.unexpected();
+      prop.kind = "init";
+      prop.method = true;
+      prop.value = this.parseMethod(isGenerator);
+    } else if (this.options.ecmaVersion >= 5 && !prop.computed && prop.key.type === "Identifier" && (prop.key.name === "get" || prop.key.name === "set") && (this.type != tt.comma && this.type != tt.braceR)) {
+      if (isGenerator || isPattern) this.unexpected();
+      prop.kind = prop.key.name;
+      this.parsePropertyName(prop);
+      prop.value = this.parseMethod(false);
+    } else if (this.options.ecmaVersion >= 6 && !prop.computed && prop.key.type === "Identifier") {
+      prop.kind = "init";
+      if (isPattern) {
+        if (this.isKeyword(prop.key.name) || this.strict && (reservedWords.strictBind(prop.key.name) || reservedWords.strict(prop.key.name)) || !this.options.allowReserved && this.isReservedWord(prop.key.name)) this.raise(prop.key.start, "Binding " + prop.key.name);
+        prop.value = this.parseMaybeDefault(start, prop.key);
+      } else if (this.type === tt.eq && refShorthandDefaultPos) {
+        if (!refShorthandDefaultPos.start) refShorthandDefaultPos.start = this.start;
+        prop.value = this.parseMaybeDefault(start, prop.key);
+      } else {
+        prop.value = prop.key;
+      }
+      prop.shorthand = true;
+    } else this.unexpected();
+
+    this.checkPropClash(prop, propHash);
+    node.properties.push(this.finishNode(prop, "Property"));
+  }
+  return this.finishNode(node, isPattern ? "ObjectPattern" : "ObjectExpression");
+};
+
+pp.parsePropertyName = function (prop) {
+  if (this.options.ecmaVersion >= 6) {
+    if (this.eat(tt.bracketL)) {
+      prop.computed = true;
+      prop.key = this.parseMaybeAssign();
+      this.expect(tt.bracketR);
+      return;
+    } else {
+      prop.computed = false;
+    }
+  }
+  prop.key = this.type === tt.num || this.type === tt.string ? this.parseExprAtom() : this.parseIdent(true);
+};
+
+// Initialize empty function node.
+
+pp.initFunction = function (node) {
+  node.id = null;
+  if (this.options.ecmaVersion >= 6) {
+    node.generator = false;
+    node.expression = false;
+  }
+};
+
+// Parse object or class method.
+
+pp.parseMethod = function (isGenerator) {
+  var node = this.startNode();
+  this.initFunction(node);
+  this.expect(tt.parenL);
+  node.params = this.parseBindingList(tt.parenR, false, false);
+  var allowExpressionBody = undefined;
+  if (this.options.ecmaVersion >= 6) {
+    node.generator = isGenerator;
+    allowExpressionBody = true;
+  } else {
+    allowExpressionBody = false;
+  }
+  this.parseFunctionBody(node, allowExpressionBody);
+  return this.finishNode(node, "FunctionExpression");
+};
+
+// Parse arrow function expression with given parameters.
+
+pp.parseArrowExpression = function (node, params) {
+  this.initFunction(node);
+  node.params = this.toAssignableList(params, true);
+  this.parseFunctionBody(node, true);
+  return this.finishNode(node, "ArrowFunctionExpression");
+};
+
+// Parse function body and check parameters.
+
+pp.parseFunctionBody = function (node, allowExpression) {
+  var isExpression = allowExpression && this.type !== tt.braceL;
+
+  if (isExpression) {
+    node.body = this.parseMaybeAssign();
+    node.expression = true;
+  } else {
+    // Start a new scope with regard to labels and the `inFunction`
+    // flag (restore them to their old value afterwards).
+    var oldInFunc = this.inFunction,
+        oldInGen = this.inGenerator,
+        oldLabels = this.labels;
+    this.inFunction = true;this.inGenerator = node.generator;this.labels = [];
+    node.body = this.parseBlock(true);
+    node.expression = false;
+    this.inFunction = oldInFunc;this.inGenerator = oldInGen;this.labels = oldLabels;
+  }
+
+  // If this is a strict mode function, verify that argument names
+  // are not repeated, and it does not try to bind the words `eval`
+  // or `arguments`.
+  if (this.strict || !isExpression && node.body.body.length && this.isUseStrict(node.body.body[0])) {
+    var nameHash = {},
+        oldStrict = this.strict;
+    this.strict = true;
+    if (node.id) this.checkLVal(node.id, true);
+    for (var i = 0; i < node.params.length; i++) {
+      this.checkLVal(node.params[i], true, nameHash);
+    }this.strict = oldStrict;
+  }
+};
+
+// Parses a comma-separated list of expressions, and returns them as
+// an array. `close` is the token type that ends the list, and
+// `allowEmpty` can be turned on to allow subsequent commas with
+// nothing in between them to be parsed as `null` (which is needed
+// for array literals).
+
+pp.parseExprList = function (close, allowTrailingComma, allowEmpty, refShorthandDefaultPos) {
+  var elts = [],
+      first = true;
+  while (!this.eat(close)) {
+    if (!first) {
+      this.expect(tt.comma);
+      if (allowTrailingComma && this.afterTrailingComma(close)) break;
+    } else first = false;
+
+    if (allowEmpty && this.type === tt.comma) {
+      elts.push(null);
+    } else {
+      if (this.type === tt.ellipsis) elts.push(this.parseSpread(refShorthandDefaultPos));else elts.push(this.parseMaybeAssign(false, refShorthandDefaultPos));
+    }
+  }
+  return elts;
+};
+
+// Parse the next token as an identifier. If `liberal` is true (used
+// when parsing properties), it will also convert keywords into
+// identifiers.
+
+pp.parseIdent = function (liberal) {
+  var node = this.startNode();
+  if (liberal && this.options.allowReserved == "never") liberal = false;
+  if (this.type === tt.name) {
+    if (!liberal && (!this.options.allowReserved && this.isReservedWord(this.value) || this.strict && reservedWords.strict(this.value) && (this.options.ecmaVersion >= 6 || this.input.slice(this.start, this.end).indexOf("\\") == -1))) this.raise(this.start, "The keyword '" + this.value + "' is reserved");
+    node.name = this.value;
+  } else if (liberal && this.type.keyword) {
+    node.name = this.type.keyword;
+  } else {
+    this.unexpected();
+  }
+  this.next();
+  return this.finishNode(node, "Identifier");
+};
+
+// Parses yield expression inside generator.
+
+pp.parseYield = function () {
+  var node = this.startNode();
+  this.next();
+  if (this.type == tt.semi || this.canInsertSemicolon() || this.type != tt.star && !this.type.startsExpr) {
+    node.delegate = false;
+    node.argument = null;
+  } else {
+    node.delegate = this.eat(tt.star);
+    node.argument = this.parseMaybeAssign();
+  }
+  return this.finishNode(node, "YieldExpression");
+};
+
+// Parses array and generator comprehensions.
+
+pp.parseComprehension = function (node, isGenerator) {
+  node.blocks = [];
+  while (this.type === tt._for) {
+    var block = this.startNode();
+    this.next();
+    this.expect(tt.parenL);
+    block.left = this.parseBindingAtom();
+    this.checkLVal(block.left, true);
+    this.expectContextual("of");
+    block.right = this.parseExpression();
+    this.expect(tt.parenR);
+    node.blocks.push(this.finishNode(block, "ComprehensionBlock"));
+  }
+  node.filter = this.eat(tt._if) ? this.parseParenExpression() : null;
+  node.body = this.parseExpression();
+  this.expect(isGenerator ? tt.parenR : tt.bracketR);
+  node.generator = isGenerator;
+  return this.finishNode(node, "ComprehensionExpression");
+};
+
+},{"./identifier":3,"./state":9,"./tokentype":13,"./util":14}],3:[function(_dereq_,module,exports){
+
+
+// Test whether a given character code starts an identifier.
+
+"use strict";
+
+exports.isIdentifierStart = isIdentifierStart;
+
+// Test whether a given character is part of an identifier.
+
+exports.isIdentifierChar = isIdentifierChar;
+exports.__esModule = true;
+// This is a trick taken from Esprima. It turns out that, on
+// non-Chrome browsers, to check whether a string is in a set, a
+// predicate containing a big ugly `switch` statement is faster than
+// a regular expression, and on Chrome the two are about on par.
+// This function uses `eval` (non-lexical) to produce such a
+// predicate from a space-separated string of words.
+//
+// It starts by sorting the words by length.
+
+// Removed to create an eval-free library
+
+// Reserved word lists for various dialects of the language
+
+var reservedWords = {
+  3: function anonymous(str) {
+switch(str.length){case 6:switch(str){case "double":case "export":case "import":case "native":case "public":case "static":case "throws":return true}return false;case 4:switch(str){case "byte":case "char":case "enum":case "goto":case "long":return true}return false;case 5:switch(str){case "class":case "final":case "float":case "short":case "super":return true}return false;case 7:switch(str){case "boolean":case "extends":case "package":case "private":return true}return false;case 9:switch(str){case "interface":case "protected":case "transient":return true}return false;case 8:switch(str){case "abstract":case "volatile":return true}return false;case 10:return str === "implements";case 3:return str === "int";case 12:return str === "synchronized";}
+},
+  5: function anonymous(str) {
+switch(str.length){case 5:switch(str){case "class":case "super":case "const":return true}return false;case 6:switch(str){case "export":case "import":return true}return false;case 4:return str === "enum";case 7:return str === "extends";}
+},
+  6: function anonymous(str) {
+switch(str){case "enum":case "await":return true}return false;
+},
+  strict: function anonymous(str) {
+switch(str.length){case 9:switch(str){case "interface":case "protected":return true}return false;case 7:switch(str){case "package":case "private":return true}return false;case 6:switch(str){case "public":case "static":return true}return false;case 10:return str === "implements";case 3:return str === "let";case 5:return str === "yield";}
+},
+  strictBind: function anonymous(str) {
+switch(str){case "eval":case "arguments":return true}return false;
+}
+};
+
+exports.reservedWords = reservedWords;
+// And the keywords
+
+var ecma5AndLessKeywords = "break case catch continue debugger default do else finally for function if return switch throw try var while with null true false instanceof typeof void delete new in this";
+
+var keywords = {
+  5: function anonymous(str) {
+switch(str.length){case 4:switch(str){case "case":case "else":case "with":case "null":case "true":case "void":case "this":return true}return false;case 5:switch(str){case "break":case "catch":case "throw":case "while":case "false":return true}return false;case 3:switch(str){case "for":case "try":case "var":case "new":return true}return false;case 6:switch(str){case "return":case "switch":case "typeof":case "delete":return true}return false;case 8:switch(str){case "continue":case "debugger":case "function":return true}return false;case 2:switch(str){case "do":case "if":case "in":return true}return false;case 7:switch(str){case "default":case "finally":return true}return false;case 10:return str === "instanceof";}
+},
+  6: function anonymous(str) {
+switch(str.length){case 5:switch(str){case "break":case "catch":case "throw":case "while":case "false":case "const":case "class":case "yield":case "super":return true}return false;case 4:switch(str){case "case":case "else":case "with":case "null":case "true":case "void":case "this":return true}return false;case 6:switch(str){case "return":case "switch":case "typeof":case "delete":case "export":case "import":return true}return false;case 3:switch(str){case "for":case "try":case "var":case "new":case "let":return true}return false;case 8:switch(str){case "continue":case "debugger":case "function":return true}return false;case 7:switch(str){case "default":case "finally":case "extends":return true}return false;case 2:switch(str){case "do":case "if":case "in":return true}return false;case 10:return str === "instanceof";}
+}
+};
+
+exports.keywords = keywords;
+// ## Character categories
+
+// Big ugly regular expressions that match characters in the
+// whitespace, identifier, and identifier-start categories. These
+// are only applied when a character is found to actually have a
+// code point above 128.
+// Generated by `tools/generate-identifier-regex.js`.
+
+var nonASCIIidentifierStartChars = "ªµºÀ-ÖØ-öø-ˁˆ-ˑˠ-ˤˬˮͰ-ʹͶͷͺ-ͽͿΆΈ-ΊΌΎ-ΡΣ-ϵϷ-ҁҊ-ԯԱ-Ֆՙա-ևא-תװ-ײؠ-يٮٯٱ-ۓەۥۦۮۯۺ-ۼۿܐܒ-ܯݍ-ޥޱߊ-ߪߴߵߺࠀ-ࠕࠚࠤࠨࡀ-ࡘࢠ-ࢲऄ-हऽॐक़-ॡॱ-ঀঅ-ঌএঐও-নপ-রলশ-হঽৎড়ঢ়য়-ৡৰৱਅ-ਊਏਐਓ-ਨਪ-ਰਲਲ਼ਵਸ਼ਸਹਖ਼-ੜਫ਼ੲ-ੴઅ-ઍએ-ઑઓ-નપ-રલળવ-હઽૐૠૡଅ-ଌଏଐଓ-ନପ-ରଲଳଵ-ହଽଡ଼ଢ଼ୟ-ୡୱஃஅ-ஊஎ-ஐஒ-கஙசஜஞடணதந-பம-ஹௐఅ-ఌఎ-ఐఒ-నప-హఽౘౙౠౡಅ-ಌಎ-ಐಒ-ನಪ-ಳವ-ಹಽೞೠೡೱೲഅ-ഌഎ-ഐഒ-ഺഽൎൠൡൺ-ൿඅ-ඖක-නඳ-රලව-ෆก-ะาำเ-ๆກຂຄງຈຊຍດ-ທນ-ຟມ-ຣລວສຫອ-ະາຳຽເ-ໄໆໜ-ໟༀཀ-ཇཉ-ཬྈ-ྌက-ဪဿၐ-ၕၚ-ၝၡၥၦၮ-ၰၵ-ႁႎႠ-ჅჇჍა-ჺჼ-ቈቊ-ቍቐ-ቖቘቚ-ቝበ-ኈኊ-ኍነ-ኰኲ-ኵኸ-ኾዀዂ-ዅወ-
 ዖዘ-ጐጒ-ጕጘ-ፚᎀ-ᎏᎠ-Ᏼᐁ-ᙬᙯ-ᙿᚁ-ᚚᚠ-ᛪᛮ-ᛸᜀ-ᜌᜎ-ᜑᜠ-ᜱᝀ-ᝑᝠ-ᝬᝮ-ᝰក-ឳៗៜᠠ-ᡷᢀ-ᢨᢪᢰ-ᣵᤀ-ᤞᥐ-ᥭᥰ-ᥴᦀ-ᦫᧁ-ᧇᨀ-ᨖᨠ-ᩔᪧᬅ-ᬳᭅ-ᭋᮃ-ᮠᮮᮯᮺ-ᯥᰀ-ᰣᱍ-ᱏᱚ-ᱽᳩ-ᳬᳮ-ᳱᳵᳶᴀ-ᶿḀ-ἕἘ-Ἕἠ-ὅὈ-Ὅὐ-ὗὙὛὝὟ-ώᾀ-ᾴᾶ-ᾼιῂ-ῄῆ-ῌῐ-ΐῖ-Ίῠ-Ῥῲ-ῴῶ-ῼⁱⁿₐ-ₜℂℇℊ-ℓℕ℘-ℝℤΩℨK-ℹℼ-ℿⅅ-ⅉⅎⅠ-ↈⰀ-Ⱞⰰ-ⱞⱠ-ⳤⳫ-ⳮⳲⳳⴀ-ⴥⴧⴭⴰ-ⵧⵯⶀ-ⶖⶠ-ⶦⶨ-ⶮⶰ-ⶶⶸ-ⶾⷀ-ⷆⷈ-ⷎⷐ-ⷖⷘ-ⷞ々-〇〡-〩〱-〵〸-〼ぁ-ゖ゛-ゟァ-ヺー-ヿㄅ-ㄭㄱ-ㆎㆠ-ㆺㇰ-ㇿ㐀-䶵一-鿌ꀀ-ꒌꓐ-ꓽꔀ-ꘌꘐ-ꘟꘪꘫꙀ-ꙮꙿ-ꚝꚠ-ꛯꜗ-ꜟꜢ-ꞈꞋ-ꞎꞐ-ꞭꞰꞱꟷ-ꠁꠃ-ꠅꠇ-ꠊꠌ-ꠢꡀ-ꡳꢂ-ꢳꣲ-ꣷꣻꤊ-ꤥꤰ-ꥆꥠ-ꥼꦄ-ꦲꧏꧠ-ꧤꧦ-ꧯꧺ-ꧾꨀ-ꨨꩀ-ꩂꩄ-ꩋꩠ-ꩶꩺꩾ-ꪯꪱꪵꪶꪹ-ꪽꫀꫂꫛ-ꫝꫠ-ꫪꫲ-ꫴꬁ-ꬆꬉ-ꬎꬑ-ꬖꬠ-
 ꬨ-ꬮꬰ-ꭚꭜ-ꭟꭤꭥꯀ-ꯢ가-힣ힰ-ퟆퟋ-ퟻ豈-舘並-龎ff-stﬓ-ﬗיִײַ-ﬨשׁ-זּטּ-לּמּנּסּףּפּצּ-ﮱﯓ-ﴽﵐ-ﶏﶒ-ﷇﷰ-ﷻﹰ-ﹴﹶ-ﻼA-Za-zヲ-하-ᅦᅧ-ᅬᅭ-ᅲᅳ-ᅵ";
+var nonASCIIidentifierChars = "‌‍·̀-ͯ·҃-֑҇-ׇֽֿׁׂׅׄؐ-ًؚ-٩ٰۖ-ۜ۟-۪ۤۧۨ-ۭ۰-۹ܑܰ-݊ަ-ް߀-߉߫-߳ࠖ-࠙ࠛ-ࠣࠥ-ࠧࠩ-࡙࠭-࡛ࣤ-ःऺ-़ा-ॏ॑-ॗॢॣ०-९ঁ-ঃ়া-ৄেৈো-্ৗৢৣ০-৯ਁ-ਃ਼ਾ-ੂੇੈੋ-੍ੑ੦-ੱੵઁ-ઃ઼ા-ૅે-ૉો-્ૢૣ૦-૯ଁ-ଃ଼ା-ୄେୈୋ-୍ୖୗୢୣ୦-୯ஂா-ூெ-ைொ-்ௗ௦-௯ఀ-ఃా-ౄె-ైొ-్ౕౖౢౣ౦-౯ಁ-ಃ಼ಾ-ೄೆ-ೈೊ-್ೕೖೢೣ೦-೯ഁ-ഃാ-ൄെ-ൈൊ-്ൗൢൣ൦-൯ංඃ්ා-ුූෘ-ෟ෦-෯ෲෳัิ-ฺ็-๎๐-๙ັິ-ູົຼ່-ໍ໐-໙༘༙༠-༩༹༵༷༾༿ཱ-྄྆྇ྍ-ྗྙ-ྼ࿆ါ-ှ၀-၉ၖ-ၙၞ-ၠၢ-ၤၧ-ၭၱ-ၴႂ-ႍႏ-ႝ፝-፟፩-፱ᜒ-᜔ᜲ-᜴ᝒᝓᝲᝳ឴-៓៝០-៩᠋-᠍᠐-᠙ᢩᤠ-ᤫᤰ-᤻᥆-᥏ᦰ-ᧀᧈᧉ᧐-᧚ᨗ-ᨛᩕ-ᩞ᩠-᩿᩼-᪉᪐-᪙᪰-᪽ᬀ-ᬄ᬴-᭄᭐-᭙᭫-᭳ᮀ-ᮂᮡ-ᮭ᮰-᮹᯦-᯳ᰤ-᰷᱀-
 ᱉᱐-᱙᳐-᳔᳒-᳨᳭ᳲ-᳴᳸᳹᷀-᷵᷼-᷿‿⁀⁔⃐-⃥⃜⃡-⃰⳯-⵿⳱ⷠ-〪ⷿ-゙゚〯꘠-꘩꙯ꙴ-꙽ꚟ꛰꛱ꠂ꠆ꠋꠣ-ꠧꢀꢁꢴ-꣄꣐-꣙꣠-꣱꤀-꤉ꤦ-꤭ꥇ-꥓ꦀ-ꦃ꦳-꧀꧐-꧙ꧥ꧰-꧹ꨩ-ꨶꩃꩌꩍ꩐-꩙ꩻ-ꩽꪰꪲ-ꪴꪷꪸꪾ꪿꫁ꫫ-ꫯꫵ꫶ꯣ-ꯪ꯬꯭꯰-꯹ﬞ︀-️︠-︭︳︴﹍-﹏0-9_";
+
+var nonASCIIidentifierStart = new RegExp("[" + nonASCIIidentifierStartChars + "]");
+var nonASCIIidentifier = new RegExp("[" + nonASCIIidentifierStartChars + nonASCIIidentifierChars + "]");
+
+nonASCIIidentifierStartChars = nonASCIIidentifierChars = null;
+
+// These are a run-length and offset encoded representation of the
+// >0xffff code points that are a valid part of identifiers. The
+// offset starts at 0x10000, and each pair of numbers represents an
+// offset to the next range, and then a size of the range. They were
+// generated by tools/generate-identifier-regex.js
+var astralIdentifierStartCodes = [0, 11, 2, 25, 2, 18, 2, 1, 2, 14, 3, 13, 35, 122, 70, 52, 268, 28, 4, 48, 48, 31, 17, 26, 6, 37, 11, 29, 3, 35, 5, 7, 2, 4, 43, 157, 99, 39, 9, 51, 157, 310, 10, 21, 11, 7, 153, 5, 3, 0, 2, 43, 2, 1, 4, 0, 3, 22, 11, 22, 10, 30, 98, 21, 11, 25, 71, 55, 7, 1, 65, 0, 16, 3, 2, 2, 2, 26, 45, 28, 4, 28, 36, 7, 2, 27, 28, 53, 11, 21, 11, 18, 14, 17, 111, 72, 955, 52, 76, 44, 33, 24, 27, 35, 42, 34, 4, 0, 13, 47, 15, 3, 22, 0, 38, 17, 2, 24, 133, 46, 39, 7, 3, 1, 3, 21, 2, 6, 2, 1, 2, 4, 4, 0, 32, 4, 287, 47, 21, 1, 2, 0, 185, 46, 82, 47, 21, 0, 60, 42, 502, 63, 32, 0, 449, 56, 1288, 920, 104, 110, 2962, 1070, 13266, 568, 8, 30, 114, 29, 19, 47, 17, 3, 32, 20, 6, 18, 881, 68, 12, 0, 67, 12, 16481, 1, 3071, 106, 6, 12, 4, 8, 8, 9, 5991, 84, 2, 70, 2, 1, 3, 0, 3, 1, 3, 3, 2, 11, 2, 0, 2, 6, 2, 64, 2, 3, 3, 7, 2, 6, 2, 27, 2, 3, 2, 4, 2, 0, 4, 6, 2, 339, 3, 24, 2, 24, 2, 30, 2, 24, 2, 30, 2, 24, 2, 30, 2, 24, 2, 30, 2, 24, 2, 7, 4149, 196, 1340, 3, 2, 26, 2,
  1, 2, 0, 3, 0, 2, 9, 2, 3, 2, 0, 2, 0, 7, 0, 5, 0, 2, 0, 2, 0, 2, 2, 2, 1, 2, 0, 3, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 1, 2, 0, 3, 3, 2, 6, 2, 3, 2, 3, 2, 0, 2, 9, 2, 16, 6, 2, 2, 4, 2, 16, 4421, 42710, 42, 4148, 12, 221, 16355, 541];
+var astralIdentifierCodes = [509, 0, 227, 0, 150, 4, 294, 9, 1368, 2, 2, 1, 6, 3, 41, 2, 5, 0, 166, 1, 1306, 2, 54, 14, 32, 9, 16, 3, 46, 10, 54, 9, 7, 2, 37, 13, 2, 9, 52, 0, 13, 2, 49, 13, 16, 9, 83, 11, 168, 11, 6, 9, 8, 2, 57, 0, 2, 6, 3, 1, 3, 2, 10, 0, 11, 1, 3, 6, 4, 4, 316, 19, 13, 9, 214, 6, 3, 8, 112, 16, 16, 9, 82, 12, 9, 9, 535, 9, 20855, 9, 135, 4, 60, 6, 26, 9, 1016, 45, 17, 3, 19723, 1, 5319, 4, 4, 5, 9, 7, 3, 6, 31, 3, 149, 2, 1418, 49, 4305, 6, 792618, 239];
+
+// This has a complexity linear to the value of the code. The
+// assumption is that looking up astral identifier characters is
+// rare.
+function isInAstralSet(code, set) {
+  var pos = 65536;
+  for (var i = 0; i < set.length; i += 2) {
+    pos += set[i];
+    if (pos > code) {
+      return false;
+    }pos += set[i + 1];
+    if (pos >= code) {
+      return true;
+    }
+  }
+}
+function isIdentifierStart(code, astral) {
+  if (code < 65) {
+    return code === 36;
+  }if (code < 91) {
+    return true;
+  }if (code < 97) {
+    return code === 95;
+  }if (code < 123) {
+    return true;
+  }if (code <= 65535) {
+    return code >= 170 && nonASCIIidentifierStart.test(String.fromCharCode(code));
+  }if (astral === false) {
+    return false;
+  }return isInAstralSet(code, astralIdentifierStartCodes);
+}
+
+function isIdentifierChar(code, astral) {
+  if (code < 48) {
+    return code === 36;
+  }if (code < 58) {
+    return true;
+  }if (code < 65) {
+    return false;
+  }if (code < 91) {
+    return true;
+  }if (code < 97) {
+    return code === 95;
+  }if (code < 123) {
+    return true;
+  }if (code <= 65535) {
+    return code >= 170 && nonASCIIidentifier.test(String.fromCharCode(code));
+  }if (astral === false) {
+    return false;
+  }return isInAstralSet(code, astralIdentifierStartCodes) || isInAstralSet(code, astralIdentifierCodes);
+}
+
+},{}],4:[function(_dereq_,module,exports){
+"use strict";
+
+var _classCallCheck = function (instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } };
+
+// The `getLineInfo` function is mostly useful when the
+// `locations` option is off (for performance reasons) and you
+// want to find the line/column position for a given character
+// offset. `input` should be the code string that the offset refers
+// into.
+
+exports.getLineInfo = getLineInfo;
+exports.__esModule = true;
+
+var Parser = _dereq_("./state").Parser;
+
+var lineBreakG = _dereq_("./whitespace").lineBreakG;
+
+// These are used when `options.locations` is on, for the
+// `startLoc` and `endLoc` properties.
+
+var Position = exports.Position = (function () {
+  function Position(line, col) {
+    _classCallCheck(this, Position);
+
+    this.line = line;
+    this.column = col;
+  }
+
+  Position.prototype.offset = function offset(n) {
+    return new Position(this.line, this.column + n);
+  };
+
+  return Position;
+})();
+
+var SourceLocation = exports.SourceLocation = function SourceLocation(p, start, end) {
+  _classCallCheck(this, SourceLocation);
+
+  this.start = start;
+  this.end = end;
+  if (p.sourceFile !== null) this.source = p.sourceFile;
+};
+
+function getLineInfo(input, offset) {
+  for (var line = 1, cur = 0;;) {
+    lineBreakG.lastIndex = cur;
+    var match = lineBreakG.exec(input);
+    if (match && match.index < offset) {
+      ++line;
+      cur = match.index + match[0].length;
+    } else {
+      return new Position(line, offset - cur);
+    }
+  }
+}
+
+var pp = Parser.prototype;
+
+// This function is used to raise exceptions on parse errors. It
+// takes an offset integer (into the current `input`) to indicate
+// the location of the error, attaches the position to the end
+// of the error message, and then raises a `SyntaxError` with that
+// message.
+
+pp.raise = function (pos, message) {
+  var loc = getLineInfo(this.input, pos);
+  message += " (" + loc.line + ":" + loc.column + ")";
+  var err = new SyntaxError(message);
+  err.pos = pos;err.loc = loc;err.raisedAt = this.pos;
+  throw err;
+};
+
+pp.curPosition = function () {
+  return new Position(this.curLine, this.pos - this.lineStart);
+};
+
+pp.markPosition = function () {
+  return this.options.locations ? [this.start, this.startLoc] : this.start;
+};
+
+},{"./state":9,"./whitespace":15}],5:[function(_dereq_,module,exports){
+"use strict";
+
+var tt = _dereq_("./tokentype").types;
+
+var Parser = _dereq_("./state").Parser;
+
+var reservedWords = _dereq_("./identifier").reservedWords;
+
+var has = _dereq_("./util").has;
+
+var pp = Parser.prototype;
+
+// Convert existing expression atom to assignable pattern
+// if possible.
+
+pp.toAssignable = function (node, isBinding) {
+  if (this.options.ecmaVersion >= 6 && node) {
+    switch (node.type) {
+      case "Identifier":
+      case "ObjectPattern":
+      case "ArrayPattern":
+      case "AssignmentPattern":
+        break;
+
+      case "ObjectExpression":
+        node.type = "ObjectPattern";
+        for (var i = 0; i < node.properties.length; i++) {
+          var prop = node.properties[i];
+          if (prop.kind !== "init") this.raise(prop.key.start, "Object pattern can't contain getter or setter");
+          this.toAssignable(prop.value, isBinding);
+        }
+        break;
+
+      case "ArrayExpression":
+        node.type = "ArrayPattern";
+        this.toAssignableList(node.elements, isBinding);
+        break;
+
+      case "AssignmentExpression":
+        if (node.operator === "=") {
+          node.type = "AssignmentPattern";
+        } else {
+          this.raise(node.left.end, "Only '=' operator can be used for specifying default value.");
+        }
+        break;
+
+      case "MemberExpression":
+        if (!isBinding) break;
+
+      default:
+        this.raise(node.start, "Assigning to rvalue");
+    }
+  }
+  return node;
+};
+
+// Convert list of expression atoms to binding list.
+
+pp.toAssignableList = function (exprList, isBinding) {
+  var end = exprList.length;
+  if (end) {
+    var last = exprList[end - 1];
+    if (last && last.type == "RestElement") {
+      --end;
+    } else if (last && last.type == "SpreadElement") {
+      last.type = "RestElement";
+      var arg = last.argument;
+      this.toAssignable(arg, isBinding);
+      if (arg.type !== "Identifier" && arg.type !== "MemberExpression" && arg.type !== "ArrayPattern") this.unexpected(arg.start);
+      --end;
+    }
+  }
+  for (var i = 0; i < end; i++) {
+    var elt = exprList[i];
+    if (elt) this.toAssignable(elt, isBinding);
+  }
+  return exprList;
+};
+
+// Parses spread element.
+
+pp.parseSpread = function (refShorthandDefaultPos) {
+  var node = this.startNode();
+  this.next();
+  node.argument = this.parseMaybeAssign(refShorthandDefaultPos);
+  return this.finishNode(node, "SpreadElement");
+};
+
+pp.parseRest = function () {
+  var node = this.startNode();
+  this.next();
+  node.argument = this.type === tt.name || this.type === tt.bracketL ? this.parseBindingAtom() : this.unexpected();
+  return this.finishNode(node, "RestElement");
+};
+
+// Parses lvalue (assignable) atom.
+
+pp.parseBindingAtom = function () {
+  if (this.options.ecmaVersion < 6) return this.parseIdent();
+  switch (this.type) {
+    case tt.name:
+      return this.parseIdent();
+
+    case tt.bracketL:
+      var node = this.startNode();
+      this.next();
+      node.elements = this.parseBindingList(tt.bracketR, true, true);
+      return this.finishNode(node, "ArrayPattern");
+
+    case tt.braceL:
+      return this.parseObj(true);
+
+    default:
+      this.unexpected();
+  }
+};
+
+pp.parseBindingList = function (close, allowEmpty, allowTrailingComma) {
+  var elts = [],
+      first = true;
+  while (!this.eat(close)) {
+    if (first) first = false;else this.expect(tt.comma);
+    if (allowEmpty && this.type === tt.comma) {
+      elts.push(null);
+    } else if (allowTrailingComma && this.afterTrailingComma(close)) {
+      break;
+    } else if (this.type === tt.ellipsis) {
+      elts.push(this.parseRest());
+      this.expect(close);
+      break;
+    } else {
+      elts.push(this.parseMaybeDefault());
+    }
+  }
+  return elts;
+};
+
+// Parses assignment pattern around given atom if possible.
+
+pp.parseMaybeDefault = function (startPos, left) {
+  startPos = startPos || this.markPosition();
+  left = left || this.parseBindingAtom();
+  if (!this.eat(tt.eq)) return left;
+  var node = this.startNodeAt(startPos);
+  node.operator = "=";
+  node.left = left;
+  node.right = this.parseMaybeAssign();
+  return this.finishNode(node, "AssignmentPattern");
+};
+
+// Verify that a node is an lval — something that can be assigned
+// to.
+
+pp.checkLVal = function (expr, isBinding, checkClashes) {
+  switch (expr.type) {
+    case "Identifier":
+      if (this.strict && (reservedWords.strictBind(expr.name) || reservedWords.strict(expr.name))) this.raise(expr.start, (isBinding ? "Binding " : "Assigning to ") + expr.name + " in strict mode");
+      if (checkClashes) {
+        if (has(checkClashes, expr.name)) this.raise(expr.start, "Argument name clash in strict mode");
+        checkClashes[expr.name] = true;
+      }
+      break;
+
+    case "MemberExpression":
+      if (isBinding) this.raise(expr.start, (isBinding ? "Binding" : "Assigning to") + " member expression");
+      break;
+
+    case "ObjectPattern":
+      for (var i = 0; i < expr.properties.length; i++) {
+        this.checkLVal(expr.properties[i].value, isBinding, checkClashes);
+      }break;
+
+    case "ArrayPattern":
+      for (var i = 0; i < expr.elements.length; i++) {
+        var elem = expr.elements[i];
+        if (elem) this.checkLVal(elem, isBinding, checkClashes);
+      }
+      break;
+
+    case "AssignmentPattern":
+      this.checkLVal(expr.left, isBinding, checkClashes);
+      break;
+
+    case "RestElement":
+      this.checkLVal(expr.argument, isBinding, checkClashes);
+      break;
+
+    default:
+      this.raise(expr.start, (isBinding ? "Binding" : "Assigning to") + " rvalue");
+  }
+};
+
+},{"./identifier":3,"./state":9,"./tokentype":13,"./util":14}],6:[function(_dereq_,module,exports){
+"use strict";
+
+var _classCallCheck = function (instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } };
+
+exports.__esModule = true;
+
+var Parser = _dereq_("./state").Parser;
+
+var SourceLocation = _dereq_("./location").SourceLocation;
+
+// Start an AST node, attaching a start offset.
+
+var pp = Parser.prototype;
+
+var Node = exports.Node = function Node() {
+  _classCallCheck(this, Node);
+};
+
+pp.startNode = function () {
+  var node = new Node();
+  node.start = this.start;
+  if (this.options.locations) node.loc = new SourceLocation(this, this.startLoc);
+  if (this.options.directSourceFile) node.sourceFile = this.options.directSourceFile;
+  if (this.options.ranges) node.range = [this.start, 0];
+  return node;
+};
+
+pp.startNodeAt = function (pos) {
+  var node = new Node(),
+      start = pos;
+  if (this.options.locations) {
+    node.loc = new SourceLocation(this, start[1]);
+    start = pos[0];
+  }
+  node.start = start;
+  if (this.options.directSourceFile) node.sourceFile = this.options.directSourceFile;
+  if (this.options.ranges) node.range = [start, 0];
+  return node;
+};
+
+// Finish an AST node, adding `type` and `end` properties.
+
+pp.finishNode = function (node, type) {
+  node.type = type;
+  node.end = this.lastTokEnd;
+  if (this.options.locations) node.loc.end = this.lastTokEndLoc;
+  if (this.options.ranges) node.range[1] = this.lastTokEnd;
+  return node;
+};
+
+// Finish node at given position
+
+pp.finishNodeAt = function (node, type, pos) {
+  if (this.options.locations) {
+    node.loc.end = pos[1];pos = pos[0];
+  }
+  node.type = type;
+  node.end = pos;
+  if (this.options.ranges) node.range[1] = pos;
+  return node;
+};
+
+},{"./location":4,"./state":9}],7:[function(_dereq_,module,exports){
+
+
+// Interpret and default an options object
+
+"use strict";
+
+exports.getOptions = getOptions;
+exports.__esModule = true;
+
+var _util = _dereq_("./util");
+
+var has = _util.has;
+var isArray = _util.isArray;
+
+var SourceLocation = _dereq_("./location").SourceLocation;
+
+// A second optional argument can be given to further configure
+// the parser process. These options are recognized:
+
+var defaultOptions = {
+  // `ecmaVersion` indicates the ECMAScript version to parse. Must
+  // be either 3, or 5, or 6. This influences support for strict
+  // mode, the set of reserved words, support for getters and
+  // setters and other features.
+  ecmaVersion: 5,
+  // Source type ("script" or "module") for different semantics
+  sourceType: "script",
+  // `onInsertedSemicolon` can be a callback that will be called
+  // when a semicolon is automatically inserted. It will be passed
+  // th position of the comma as an offset, and if `locations` is
+  // enabled, it is given the location as a `{line, column}` object
+  // as second argument.
+  onInsertedSemicolon: null,
+  // `onTrailingComma` is similar to `onInsertedSemicolon`, but for
+  // trailing commas.
+  onTrailingComma: null,
+  // By default, reserved words are not enforced. Disable
+  // `allowReserved` to enforce them. When this option has the
+  // value "never", reserved words and keywords can also not be
+  // used as property names.
+  allowReserved: true,
+  // When enabled, a return at the top level is not considered an
+  // error.
+  allowReturnOutsideFunction: false,
+  // When enabled, import/export statements are not constrained to
+  // appearing at the top of the program.
+  allowImportExportEverywhere: false,
+  // When enabled, hashbang directive in the beginning of file
+  // is allowed and treated as a line comment.
+  allowHashBang: false,
+  // When `locations` is on, `loc` properties holding objects with
+  // `start` and `end` properties in `{line, column}` form (with
+  // line being 1-based and column 0-based) will be attached to the
+  // nodes.
+  locations: false,
+  // A function can be passed as `onToken` option, which will
+  // cause Acorn to call that function with object in the same
+  // format as tokenize() returns. Note that you are not
+  // allowed to call the parser from the callback—that will
+  // corrupt its internal state.
+  onToken: null,
+  // A function can be passed as `onComment` option, which will
+  // cause Acorn to call that function with `(block, text, start,
+  // end)` parameters whenever a comment is skipped. `block` is a
+  // boolean indicating whether this is a block (`/* */`) comment,
+  // `text` is the content of the comment, and `start` and `end` are
+  // character offsets that denote the start and end of the comment.
+  // When the `locations` option is on, two more parameters are
+  // passed, the full `{line, column}` locations of the start and
+  // end of the comments. Note that you are not allowed to call the
+  // parser from the callback—that will corrupt its internal state.
+  onComment: null,
+  // Nodes have their start and end characters offsets recorded in
+  // `start` and `end` properties (directly on the node, rather than
+  // the `loc` object, which holds line/column data. To also add a
+  // [semi-standardized][range] `range` property holding a `[start,
+  // end]` array with the same numbers, set the `ranges` option to
+  // `true`.
+  //
+  // [range]: https://bugzilla.mozilla.org/show_bug.cgi?id=745678
+  ranges: false,
+  // It is possible to parse multiple files into a single AST by
+  // passing the tree produced by parsing the first file as
+  // `program` option in subsequent parses. This will add the
+  // toplevel forms of the parsed file to the `Program` (top) node
+  // of an existing parse tree.
+  program: null,
+  // When `locations` is on, you can pass this to record the source
+  // file in every node's `loc` object.
+  sourceFile: null,
+  // This value, if given, is stored in every node, whether
+  // `locations` is on or off.
+  directSourceFile: null,
+  // When enabled, parenthesized expressions are represented by
+  // (non-standard) ParenthesizedExpression nodes
+  preserveParens: false,
+  plugins: {}
+};exports.defaultOptions = defaultOptions;
+
+function getOptions(opts) {
+  var options = {};
+  for (var opt in defaultOptions) {
+    options[opt] = opts && has(opts, opt) ? opts[opt] : defaultOptions[opt];
+  }if (isArray(options.onToken)) {
+    (function () {
+      var tokens = options.onToken;
+      options.onToken = function (token) {
+        return tokens.push(token);
+      };
+    })();
+  }
+  if (isArray(options.onComment)) options.onComment = pushComment(options, options.onComment);
+
+  return options;
+}
+
+function pushComment(options, array) {
+  return function (block, text, start, end, startLoc, endLoc) {
+    var comment = {
+      type: block ? "Block" : "Line",
+      value: text,
+      start: start,
+      end: end
+    };
+    if (options.locations) comment.loc = new SourceLocation(this, startLoc, endLoc);
+    if (options.ranges) comment.range = [start, end];
+    array.push(comment);
+  };
+}
+
+},{"./location":4,"./util":14}],8:[function(_dereq_,module,exports){
+"use strict";
+
+var tt = _dereq_("./tokentype").types;
+
+var Parser = _dereq_("./state").Parser;
+
+var lineBreak = _dereq_("./whitespace").lineBreak;
+
+var pp = Parser.prototype;
+
+// ## Parser utilities
+
+// Test whether a statement node is the string literal `"use strict"`.
+
+pp.isUseStrict = function (stmt) {
+  return this.options.ecmaVersion >= 5 && stmt.type === "ExpressionStatement" && stmt.expression.type === "Literal" && stmt.expression.value === "use strict";
+};
+
+// Predicate that tests whether the next token is of the given
+// type, and if yes, consumes it as a side effect.
+
+pp.eat = function (type) {
+  if (this.type === type) {
+    this.next();
+    return true;
+  } else {
+    return false;
+  }
+};
+
+// Tests whether parsed token is a contextual keyword.
+
+pp.isContextual = function (name) {
+  return this.type === tt.name && this.value === name;
+};
+
+// Consumes contextual keyword if possible.
+
+pp.eatContextual = function (name) {
+  return this.value === name && this.eat(tt.name);
+};
+
+// Asserts that following token is given contextual keyword.
+
+pp.expectContextual = function (name) {
+  if (!this.eatContextual(name)) this.unexpected();
+};
+
+// Test whether a semicolon can be inserted at the current position.
+
+pp.canInsertSemicolon = function () {
+  return this.type === tt.eof || this.type === tt.braceR || lineBreak.test(this.input.slice(this.lastTokEnd, this.start));
+};
+
+pp.insertSemicolon = function () {
+  if (this.canInsertSemicolon()) {
+    if (this.options.onInsertedSemicolon) this.options.onInsertedSemicolon(this.lastTokEnd, this.lastTokEndLoc);
+    return true;
+  }
+};
+
+// Consume a semicolon, or, failing that, see if we are allowed to
+// pretend that there is a semicolon at this position.
+
+pp.semicolon = function () {
+  if (!this.eat(tt.semi) && !this.insertSemicolon()) this.unexpected();
+};
+
+pp.afterTrailingComma = function (tokType) {
+  if (this.type == tokType) {
+    if (this.options.onTrailingComma) this.options.onTrailingComma(this.lastTokStart, this.lastTokStartLoc);
+    this.next();
+    return true;
+  }
+};
+
+// Expect a token of a given type. If found, consume it, otherwise,
+// raise an unexpected token error.
+
+pp.expect = function (type) {
+  this.eat(type) || this.unexpected();
+};
+
+// Raise an unexpected token error.
+
+pp.unexpected = function (pos) {
+  this.raise(pos != null ? pos : this.start, "Unexpected token");
+};
+
+},{"./state":9,"./tokentype":13,"./whitespace":15}],9:[function(_dereq_,module,exports){
+"use strict";
+
+exports.Parser = Parser;
+exports.__esModule = true;
+
+var _identifier = _dereq_("./identifier");
+
+var reservedWords = _identifier.reservedWords;
+var keywords = _identifier.keywords;
+
+var _tokentype = _dereq_("./tokentype");
+
+var tt = _tokentype.types;
+var lineBreak = _tokentype.lineBreak;
+
+function Parser(options, input, startPos) {
+  this.options = options;
+  this.loadPlugins(this.options.plugins);
+  this.sourceFile = this.options.sourceFile || null;
+  this.isKeyword = keywords[this.options.ecmaVersion >= 6 ? 6 : 5];
+  this.isReservedWord = reservedWords[this.options.ecmaVersion];
+  this.input = input;
+
+  // Set up token state
+
+  // The current position of the tokenizer in the input.
+  if (startPos) {
+    this.pos = startPos;
+    this.lineStart = Math.max(0, this.input.lastIndexOf("\n", startPos));
+    this.curLine = this.input.slice(0, this.lineStart).split(lineBreak).length;
+  } else {
+    this.pos = this.lineStart = 0;
+    this.curLine = 1;
+  }
+
+  // Properties of the current token:
+  // Its type
+  this.type = tt.eof;
+  // For tokens that include more information than their type, the value
+  this.value = null;
+  // Its start and end offset
+  this.start = this.end = this.pos;
+  // And, if locations are used, the {line, column} object
+  // corresponding to those offsets
+  this.startLoc = this.endLoc = null;
+
+  // Position information for the previous token
+  this.lastTokEndLoc = this.lastTokStartLoc = null;
+  this.lastTokStart = this.lastTokEnd = this.pos;
+
+  // The context stack is used to superficially track syntactic
+  // context to predict whether a regular expression is allowed in a
+  // given position.
+  this.context = this.initialContext();
+  this.exprAllowed = true;
+
+  // Figure out if it's a module code.
+  this.strict = this.inModule = this.options.sourceType === "module";
+
+  // Flags to track whether we are in a function, a generator.
+  this.inFunction = this.inGenerator = false;
+  // Labels in scope.
+  this.labels = [];
+
+  // If enabled, skip leading hashbang line.
+  if (this.pos === 0 && this.options.allowHashBang && this.input.slice(0, 2) === "#!") this.skipLineComment(2);
+}
+
+Parser.prototype.extend = function (name, f) {
+  this[name] = f(this[name]);
+};
+
+// Registered plugins
+
+var plugins = {};
+
+exports.plugins = plugins;
+Parser.prototype.loadPlugins = function (plugins) {
+  for (var _name in plugins) {
+    var plugin = exports.plugins[_name];
+    if (!plugin) throw new Error("Plugin '" + _name + "' not found");
+    plugin(this, plugins[_name]);
+  }
+};
+
+},{"./identifier":3,"./tokentype":13}],10:[function(_dereq_,module,exports){
+"use strict";
+
+var tt = _dereq_("./tokentype").types;
+
+var Parser = _dereq_("./state").Parser;
+
+var lineBreak = _dereq_("./whitespace").lineBreak;
+
+var pp = Parser.prototype;
+
+// ### Statement parsing
+
+// Parse a program. Initializes the parser, reads any number of
+// statements, and wraps them in a Program node.  Optionally takes a
+// `program` argument.  If present, the statements will be appended
+// to its body instead of creating a new node.
+
+pp.parseTopLevel = function (node) {
+  var first = true;
+  if (!node.body) node.body = [];
+  while (this.type !== tt.eof) {
+    var stmt = this.parseStatement(true, true);
+    node.body.push(stmt);
+    if (first && this.isUseStrict(stmt)) this.setStrict(true);
+    first = false;
+  }
+  this.next();
+  if (this.options.ecmaVersion >= 6) {
+    node.sourceType = this.options.sourceType;
+  }
+  return this.finishNode(node, "Program");
+};
+
+var loopLabel = { kind: "loop" },
+    switchLabel = { kind: "switch" };
+
+// Parse a single statement.
+//
+// If expecting a statement and finding a slash operator, parse a
+// regular expression literal. This is to handle cases like
+// `if (foo) /blah/.exec(foo)`, where looking at the previous token
+// does not help.
+
+pp.parseStatement = function (declaration, topLevel) {
+  var starttype = this.type,
+      node = this.startNode();
+
+  // Most types of statements are recognized by the keyword they
+  // start with. Many are trivial to parse, some require a bit of
+  // complexity.
+
+  switch (starttype) {
+    case tt._break:case tt._continue:
+      return this.parseBreakContinueStatement(node, starttype.keyword);
+    case tt._debugger:
+      return this.parseDebuggerStatement(node);
+    case tt._do:
+      return this.parseDoStatement(node);
+    case tt._for:
+      return this.parseForStatement(node);
+    case tt._function:
+      if (!declaration && this.options.ecmaVersion >= 6) this.unexpected();
+      return this.parseFunctionStatement(node);
+    case tt._class:
+      if (!declaration) this.unexpected();
+      return this.parseClass(node, true);
+    case tt._if:
+      return this.parseIfStatement(node);
+    case tt._return:
+      return this.parseReturnStatement(node);
+    case tt._switch:
+      return this.parseSwitchStatement(node);
+    case tt._throw:
+      return this.parseThrowStatement(node);
+    case tt._try:
+      return this.parseTryStatement(node);
+    case tt._let:case tt._const:
+      if (!declaration) this.unexpected(); // NOTE: falls through to _var
+    case tt._var:
+      return this.parseVarStatement(node, starttype);
+    case tt._while:
+      return this.parseWhileStatement(node);
+    case tt._with:
+      return this.parseWithStatement(node);
+    case tt.braceL:
+      return this.parseBlock();
+    case tt.semi:
+      return this.parseEmptyStatement(node);
+    case tt._export:
+    case tt._import:
+      if (!this.options.allowImportExportEverywhere) {
+        if (!topLevel) this.raise(this.start, "'import' and 'export' may only appear at the top level");
+        if (!this.inModule) this.raise(this.start, "'import' and 'export' may appear only with 'sourceType: module'");
+      }
+      return starttype === tt._import ? this.parseImport(node) : this.parseExport(node);
+
+    // If the statement does not start with a statement keyword or a
+    // brace, it's an ExpressionStatement or LabeledStatement. We
+    // simply start parsing an expression, and afterwards, if the
+    // next token is a colon and the expression was a simple
+    // Identifier node, we switch to interpreting it as a label.
+    default:
+      var maybeName = this.value,
+          expr = this.parseExpression();
+      if (starttype === tt.name && expr.type === "Identifier" && this.eat(tt.colon)) return this.parseLabeledStatement(node, maybeName, expr);else return this.parseExpressionStatement(node, expr);
+  }
+};
+
+pp.parseBreakContinueStatement = function (node, keyword) {
+  var isBreak = keyword == "break";
+  this.next();
+  if (this.eat(tt.semi) || this.insertSemicolon()) node.label = null;else if (this.type !== tt.name) this.unexpected();else {
+    node.label = this.parseIdent();
+    this.semicolon();
+  }
+
+  // Verify that there is an actual destination to break or
+  // continue to.
+  for (var i = 0; i < this.labels.length; ++i) {
+    var lab = this.labels[i];
+    if (node.label == null || lab.name === node.label.name) {
+      if (lab.kind != null && (isBreak || lab.kind === "loop")) break;
+      if (node.label && isBreak) break;
+    }
+  }
+  if (i === this.labels.length) this.raise(node.start, "Unsyntactic " + keyword);
+  return this.finishNode(node, isBreak ? "BreakStatement" : "ContinueStatement");
+};
+
+pp.parseDebuggerStatement = function (node) {
+  this.next();
+  this.semicolon();
+  return this.finishNode(node, "DebuggerStatement");
+};
+
+pp.parseDoStatement = function (node) {
+  this.next();
+  this.labels.push(loopLabel);
+  node.body = this.parseStatement(false);
+  this.labels.pop();
+  this.expect(tt._while);
+  node.test = this.parseParenExpression();
+  if (this.options.ecmaVersion >= 6) this.eat(tt.semi);else this.semicolon();
+  return this.finishNode(node, "DoWhileStatement");
+};
+
+// Disambiguating between a `for` and a `for`/`in` or `for`/`of`
+// loop is non-trivial. Basically, we have to parse the init `var`
+// statement or expression, disallowing the `in` operator (see
+// the second parameter to `parseExpression`), and then check
+// whether the next token is `in` or `of`. When there is no init
+// part (semicolon immediately after the opening parenthesis), it
+// is a regular `for` loop.
+
+pp.parseForStatement = function (node) {
+  this.next();
+  this.labels.push(loopLabel);
+  this.expect(tt.parenL);
+  if (this.type === tt.semi) return this.parseFor(node, null);
+  if (this.type === tt._var || this.type === tt._let || this.type === tt._const) {
+    var _init = this.startNode(),
+        varKind = this.type;
+    this.next();
+    this.parseVar(_init, true, varKind);
+    this.finishNode(_init, "VariableDeclaration");
+    if ((this.type === tt._in || this.options.ecmaVersion >= 6 && this.isContextual("of")) && _init.declarations.length === 1 && !(varKind !== tt._var && _init.declarations[0].init)) return this.parseForIn(node, _init);
+    return this.parseFor(node, _init);
+  }
+  var refShorthandDefaultPos = { start: 0 };
+  var init = this.parseExpression(true, refShorthandDefaultPos);
+  if (this.type === tt._in || this.options.ecmaVersion >= 6 && this.isContextual("of")) {
+    this.toAssignable(init);
+    this.checkLVal(init);
+    return this.parseForIn(node, init);
+  } else if (refShorthandDefaultPos.start) {
+    this.unexpected(refShorthandDefaultPos.start);
+  }
+  return this.parseFor(node, init);
+};
+
+pp.parseFunctionStatement = function (node) {
+  this.next();
+  return this.parseFunction(node, true);
+};
+
+pp.parseIfStatement = function (node) {
+  this.next();
+  node.test = this.parseParenExpression();
+  node.consequent = this.parseStatement(false);
+  node.alternate = this.eat(tt._else) ? this.parseStatement(false) : null;
+  return this.finishNode(node, "IfStatement");
+};
+
+pp.parseReturnStatement = function (node) {
+  if (!this.inFunction && !this.options.allowReturnOutsideFunction) this.raise(this.start, "'return' outside of function");
+  this.next();
+
+  // In `return` (and `break`/`continue`), the keywords with
+  // optional arguments, we eagerly look for a semicolon or the
+  // possibility to insert one.
+
+  if (this.eat(tt.semi) || this.insertSemicolon()) node.argument = null;else {
+    node.argument = this.parseExpression();this.semicolon();
+  }
+  return this.finishNode(node, "ReturnStatement");
+};
+
+pp.parseSwitchStatement = function (node) {
+  this.next();
+  node.discriminant = this.parseParenExpression();
+  node.cases = [];
+  this.expect(tt.braceL);
+  this.labels.push(switchLabel);
+
+  // Statements under must be grouped (by label) in SwitchCase
+  // nodes. `cur` is used to keep the node that we are currently
+  // adding statements to.
+
+  for (var cur, sawDefault; this.type != tt.braceR;) {
+    if (this.type === tt._case || this.type === tt._default) {
+      var isCase = this.type === tt._case;
+      if (cur) this.finishNode(cur, "SwitchCase");
+      node.cases.push(cur = this.startNode());
+      cur.consequent = [];
+      this.next();
+      if (isCase) {
+        cur.test = this.parseExpression();
+      } else {
+        if (sawDefault) this.raise(this.lastTokStart, "Multiple default clauses");
+        sawDefault = true;
+        cur.test = null;
+      }
+      this.expect(tt.colon);
+    } else {
+      if (!cur) this.unexpected();
+      cur.consequent.push(this.parseStatement(true));
+    }
+  }
+  if (cur) this.finishNode(cur, "SwitchCase");
+  this.next(); // Closing brace
+  this.labels.pop();
+  return this.finishNode(node, "SwitchStatement");
+};
+
+pp.parseThrowStatement = function (node) {
+  this.next();
+  if (lineBreak.test(this.input.slice(this.lastTokEnd, this.start))) this.raise(this.lastTokEnd, "Illegal newline after throw");
+  node.argument = this.parseExpression();
+  this.semicolon();
+  return this.finishNode(node, "ThrowStatement");
+};
+
+// Reused empty array added for node fields that are always empty.
+
+var empty = [];
+
+pp.parseTryStatement = function (node) {
+  this.next();
+  node.block = this.parseBlock();
+  node.handler = null;
+  if (this.type === tt._catch) {
+    var clause = this.startNode();
+    this.next();
+    this.expect(tt.parenL);
+    clause.param = this.parseBindingAtom();
+    this.checkLVal(clause.param, true);
+    this.expect(tt.parenR);
+    clause.guard = null;
+    clause.body = this.parseBlock();
+    node.handler = this.finishNode(clause, "CatchClause");
+  }
+  node.guardedHandlers = empty;
+  node.finalizer = this.eat(tt._finally) ? this.parseBlock() : null;
+  if (!node.handler && !node.finalizer) this.raise(node.start, "Missing catch or finally clause");
+  return this.finishNode(node, "TryStatement");
+};
+
+pp.parseVarStatement = function (node, kind) {
+  this.next();
+  this.parseVar(node, false, kind);
+  this.semicolon();
+  return this.finishNode(node, "VariableDeclaration");
+};
+
+pp.parseWhileStatement = function (node) {
+  this.next();
+  node.test = this.parseParenExpression();
+  this.labels.push(loopLabel);
+  node.body = this.parseStatement(false);
+  this.labels.pop();
+  return this.finishNode(node, "WhileStatement");
+};
+
+pp.parseWithStatement = function (node) {
+  if (this.strict) this.raise(this.start, "'with' in strict mode");
+  this.next();
+  node.object = this.parseParenExpression();
+  node.body = this.parseStatement(false);
+  return this.finishNode(node, "WithStatement");
+};
+
+pp.parseEmptyStatement = function (node) {
+  this.next();
+  return this.finishNode(node, "EmptyStatement");
+};
+
+pp.parseLabeledStatement = function (node, maybeName, expr) {
+  for (var i = 0; i < this.labels.length; ++i) {
+    if (this.labels[i].name === maybeName) this.raise(expr.start, "Label '" + maybeName + "' is already declared");
+  }var kind = this.type.isLoop ? "loop" : this.type === tt._switch ? "switch" : null;
+  this.labels.push({ name: maybeName, kind: kind });
+  node.body = this.parseStatement(true);
+  this.labels.pop();
+  node.label = expr;
+  return this.finishNode(node, "LabeledStatement");
+};
+
+pp.parseExpressionStatement = function (node, expr) {
+  node.expression = expr;
+  this.semicolon();
+  return this.finishNode(node, "ExpressionStatement");
+};
+
+// Parse a semicolon-enclosed block of statements, handling `"use
+// strict"` declarations when `allowStrict` is true (used for
+// function bodies).
+
+pp.parseBlock = function (allowStrict) {
+  var node = this.startNode(),
+      first = true,
+      oldStrict = undefined;
+  node.body = [];
+  this.expect(tt.braceL);
+  while (!this.eat(tt.braceR)) {
+    var stmt = this.parseStatement(true);
+    node.body.push(stmt);
+    if (first && allowStrict && this.isUseStrict(stmt)) {
+      oldStrict = this.strict;
+      this.setStrict(this.strict = true);
+    }
+    first = false;
+  }
+  if (oldStrict === false) this.setStrict(false);
+  return this.finishNode(node, "BlockStatement");
+};
+
+// Parse a regular `for` loop. The disambiguation code in
+// `parseStatement` will already have parsed the init statement or
+// expression.
+
+pp.parseFor = function (node, init) {
+  node.init = init;
+  this.expect(tt.semi);
+  node.test = this.type === tt.semi ? null : this.parseExpression();
+  this.expect(tt.semi);
+  node.update = this.type === tt.parenR ? null : this.parseExpression();
+  this.expect(tt.parenR);
+  node.body = this.parseStatement(false);
+  this.labels.pop();
+  return this.finishNode(node, "ForStatement");
+};
+
+// Parse a `for`/`in` and `for`/`of` loop, which are almost
+// same from parser's perspective.
+
+pp.parseForIn = function (node, init) {
+  var type = this.type === tt._in ? "ForInStatement" : "ForOfStatement";
+  this.next();
+  node.left = init;
+  node.right = this.parseExpression();
+  this.expect(tt.parenR);
+  node.body = this.parseStatement(false);
+  this.labels.pop();
+  return this.finishNode(node, type);
+};
+
+// Parse a list of variable declarations.
+
+pp.parseVar = function (node, isFor, kind) {
+  node.declarations = [];
+  node.kind = kind.keyword;
+  for (;;) {
+    var decl = this.startNode();
+    decl.id = this.parseBindingAtom();
+    this.checkLVal(decl.id, true);
+    if (this.eat(tt.eq)) {
+      decl.init = this.parseMaybeAssign(isFor);
+    } else if (kind === tt._const && !(this.type === tt._in || this.options.ecmaVersion >= 6 && this.isContextual("of"))) {
+      this.unexpected();
+    } else if (decl.id.type != "Identifier" && !(isFor && (this.type === tt._in || this.isContextual("of")))) {
+      this.raise(this.lastTokEnd, "Complex binding patterns require an initialization value");
+    } else {
+      decl.init = null;
+    }
+    node.declarations.push(this.finishNode(decl, "VariableDeclarator"));
+    if (!this.eat(tt.comma)) break;
+  }
+  return node;
+};
+
+// Parse a function declaration or literal (depending on the
+// `isStatement` parameter).
+
+pp.parseFunction = function (node, isStatement, allowExpressionBody) {
+  this.initFunction(node);
+  if (this.options.ecmaVersion >= 6) node.generator = this.eat(tt.star);
+  if (isStatement || this.type === tt.name) node.id = this.parseIdent();
+  this.expect(tt.parenL);
+  node.params = this.parseBindingList(tt.parenR, false, false);
+  this.parseFunctionBody(node, allowExpressionBody);
+  return this.finishNode(node, isStatement ? "FunctionDeclaration" : "FunctionExpression");
+};
+
+// Parse a class declaration or literal (depending on the
+// `isStatement` parameter).
+
+pp.parseClass = function (node, isStatement) {
+  this.next();
+  node.id = this.type === tt.name ? this.parseIdent() : isStatement ? this.unexpected() : null;
+  node.superClass = this.eat(tt._extends) ? this.parseExprSubscripts() : null;
+  var classBody = this.startNode();
+  classBody.body = [];
+  this.expect(tt.braceL);
+  while (!this.eat(tt.braceR)) {
+    if (this.eat(tt.semi)) continue;
+    var method = this.startNode();
+    var isGenerator = this.eat(tt.star);
+    this.parsePropertyName(method);
+    if (this.type !== tt.parenL && !method.computed && method.key.type === "Identifier" && method.key.name === "static") {
+      if (isGenerator) this.unexpected();
+      method["static"] = true;
+      isGenerator = this.eat(tt.star);
+      this.parsePropertyName(method);
+    } else {
+      method["static"] = false;
+    }
+    method.kind = "method";
+    if (!method.computed && !isGenerator) {
+      if (method.key.type === "Identifier") {
+        if (this.type !== tt.parenL && (method.key.name === "get" || method.key.name === "set")) {
+          method.kind = method.key.name;
+          this.parsePropertyName(method);
+        } else if (!method["static"] && method.key.name === "constructor") {
+          method.kind = "constructor";
+        }
+      } else if (!method["static"] && method.key.type === "Literal" && method.key.value === "constructor") {
+        method.kind = "constructor";
+      }
+    }
+    method.value = this.parseMethod(isGenerator);
+    classBody.body.push(this.finishNode(method, "MethodDefinition"));
+  }
+  node.body = this.finishNode(classBody, "ClassBody");
+  return this.finishNode(node, isStatement ? "ClassDeclaration" : "ClassExpression");
+};
+
+// Parses module export declaration.
+
+pp.parseExport = function (node) {
+  this.next();
+  // export * from '...'
+  if (this.eat(tt.star)) {
+    this.expectContextual("from");
+    node.source = this.type === tt.string ? this.parseExprAtom() : this.unexpected();
+    this.semicolon();
+    return this.finishNode(node, "ExportAllDeclaration");
+  }
+  if (this.eat(tt._default)) {
+    // export default ...
+    var expr = this.parseMaybeAssign();
+    var needsSemi = true;
+    if (expr.type == "FunctionExpression" || expr.type == "ClassExpression") {
+      needsSemi = false;
+      if (expr.id) {
+        expr.type = expr.type == "FunctionExpression" ? "FunctionDeclaration" : "ClassDeclaration";
+      }
+    }
+    node.declaration = expr;
+    if (needsSemi) this.semicolon();
+    return this.finishNode(node, "ExportDefaultDeclaration");
+  }
+  // export var|const|let|function|class ...
+  if (this.type.keyword) {
+    node.declaration = this.parseStatement(true);
+    node.specifiers = [];
+    node.source = null;
+  } else {
+    // export { x, y as z } [from '...']
+    node.declaration = null;
+    node.specifiers = this.parseExportSpecifiers();
+    if (this.eatContextual("from")) {
+      node.source = this.type === tt.string ? this.parseExprAtom() : this.unexpected();
+    } else {
+      node.source = null;
+    }
+    this.semicolon();
+  }
+  return this.finishNode(node, "ExportNamedDeclaration");
+};
+
+// Parses a comma-separated list of module exports.
+
+pp.parseExportSpecifiers = function () {
+  var nodes = [],
+      first = true;
+  // export { x, y as z } [from '...']
+  this.expect(tt.braceL);
+  while (!this.eat(tt.braceR)) {
+    if (!first) {
+      this.expect(tt.comma);
+      if (this.afterTrailingComma(tt.braceR)) break;
+    } else first = false;
+
+    var node = this.startNode();
+    node.local = this.parseIdent(this.type === tt._default);
+    node.exported = this.eatContextual("as") ? this.parseIdent(true) : node.local;
+    nodes.push(this.finishNode(node, "ExportSpecifier"));
+  }
+  return nodes;
+};
+
+// Parses import declaration.
+
+pp.parseImport = function (node) {
+  this.next();
+  // import '...'
+  if (this.type === tt.string) {
+    node.specifiers = empty;
+    node.source = this.parseExprAtom();
+    node.kind = "";
+  } else {
+    node.specifiers = this.parseImportSpecifiers();
+    this.expectContextual("from");
+    node.source = this.type === tt.string ? this.parseExprAtom() : this.unexpected();
+  }
+  this.semicolon();
+  return this.finishNode(node, "ImportDeclaration");
+};
+
+// Parses a comma-separated list of module imports.
+
+pp.parseImportSpecifiers = function () {
+  var nodes = [],
+      first = true;
+  if (this.type === tt.name) {
+    // import defaultObj, { x, y as z } from '...'
+    var node = this.startNode();
+    node.local = this.parseIdent();
+    this.checkLVal(node.local, true);
+    nodes.push(this.finishNode(node, "ImportDefaultSpecifier"));
+    if (!this.eat(tt.comma)) return nodes;
+  }
+  if (this.type === tt.star) {
+    var node = this.startNode();
+    this.next();
+    this.expectContextual("as");
+    node.local = this.parseIdent();
+    this.checkLVal(node.local, true);
+    nodes.push(this.finishNode(node, "ImportNamespaceSpecifier"));
+    return nodes;
+  }
+  this.expect(tt.braceL);
+  while (!this.eat(tt.braceR)) {
+    if (!first) {
+      this.expect(tt.comma);
+      if (this.afterTrailingComma(tt.braceR)) break;
+    } else first = false;
+
+    var node = this.startNode();
+    node.imported = this.parseIdent(true);
+    node.local = this.eatContextual("as") ? this.parseIdent() : node.imported;
+    this.checkLVal(node.local, true);
+    nodes.push(this.finishNode(node, "ImportSpecifier"));
+  }
+  return nodes;
+};
+
+},{"./state":9,"./tokentype":13,"./whitespace":15}],11:[function(_dereq_,module,exports){
+"use strict";
+
+var _classCallCheck = function (instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } };
+
+exports.__esModule = true;
+// The algorithm used to determine whether a regexp can appear at a
+// given point in the program is loosely based on sweet.js' approach.
+// See https://github.com/mozilla/sweet.js/wiki/design
+
+var Parser = _dereq_("./state").Parser;
+
+var tt = _dereq_("./tokentype").types;
+
+var lineBreak = _dereq_("./whitespace").lineBreak;
+
+var TokContext = exports.TokContext = function TokContext(token, isExpr, preserveSpace, override) {
+  _classCallCheck(this, TokContext);
+
+  this.token = token;
+  this.isExpr = isExpr;
+  this.preserveSpace = preserveSpace;
+  this.override = override;
+};
+
+var types = {
+  b_stat: new TokContext("{", false),
+  b_expr: new TokContext("{", true),
+  b_tmpl: new TokContext("${", true),
+  p_stat: new TokContext("(", false),
+  p_expr: new TokContext("(", true),
+  q_tmpl: new TokContext("`", true, true, function (p) {
+    return p.readTmplToken();
+  }),
+  f_expr: new TokContext("function", true)
+};
+
+exports.types = types;
+var pp = Parser.prototype;
+
+pp.initialContext = function () {
+  return [types.b_stat];
+};
+
+pp.braceIsBlock = function (prevType) {
+  var parent = undefined;
+  if (prevType === tt.colon && (parent = this.curContext()).token == "{") return !parent.isExpr;
+  if (prevType === tt._return) return lineBreak.test(this.input.slice(this.lastTokEnd, this.start));
+  if (prevType === tt._else || prevType === tt.semi || prevType === tt.eof) return true;
+  if (prevType == tt.braceL) return this.curContext() === types.b_stat;
+  return !this.exprAllowed;
+};
+
+pp.updateContext = function (prevType) {
+  var update = undefined,
+      type = this.type;
+  if (type.keyword && prevType == tt.dot) this.exprAllowed = false;else if (update = type.updateContext) update.call(this, prevType);else this.exprAllowed = type.beforeExpr;
+};
+
+// Token-specific context update code
+
+tt.parenR.updateContext = tt.braceR.updateContext = function () {
+  if (this.context.length == 1) {
+    this.exprAllowed = true;
+    return;
+  }
+  var out = this.context.pop();
+  if (out === types.b_stat && this.curContext() === types.f_expr) {
+    this.context.pop();
+    this.exprAllowed = false;
+  } else if (out === types.b_tmpl) {
+    this.exprAllowed = true;
+  } else {
+    this.exprAllowed = !out.isExpr;
+  }
+};
+
+tt.braceL.updateContext = function (prevType) {
+  this.context.push(this.braceIsBlock(prevType) ? types.b_stat : types.b_expr);
+  this.exprAllowed = true;
+};
+
+tt.dollarBraceL.updateContext = function () {
+  this.context.push(types.b_tmpl);
+  this.exprAllowed = true;
+};
+
+tt.parenL.updateContext = function (prevType) {
+  var statementParens = prevType === tt._if || prevType === tt._for || prevType === tt._with || prevType === tt._while;
+  this.context.push(statementParens ? types.p_stat : types.p_expr);
+  this.exprAllowed = true;
+};
+
+tt.incDec.updateContext = function () {};
+
+tt._function.updateContext = function () {
+  if (this.curContext() !== types.b_stat) this.context.push(types.f_expr);
+  this.exprAllowed = false;
+};
+
+tt.backQuote.updateContext = function () {
+  if (this.curContext() === types.q_tmpl) this.context.pop();else this.context.push(types.q_tmpl);
+  this.exprAllowed = false;
+};
+
+// tokExprAllowed stays unchanged
+
+},{"./state":9,"./tokentype":13,"./whitespace":15}],12:[function(_dereq_,module,exports){
+"use strict";
+
+var _classCallCheck = function (instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } };
+
+exports.__esModule = true;
+
+var _identifier = _dereq_("./identifier");
+
+var isIdentifierStart = _identifier.isIdentifierStart;
+var isIdentifierChar = _identifier.isIdentifierChar;
+
+var _tokentype = _dereq_("./tokentype");
+
+var tt = _tokentype.types;
+var keywordTypes = _tokentype.keywords;
+
+var Parser = _dereq_("./state").Parser;
+
+var SourceLocation = _dereq_("./location").SourceLocation;
+
+var _whitespace = _dereq_("./whitespace");
+
+var lineBreak = _whitespace.lineBreak;
+var lineBreakG = _whitespace.lineBreakG;
+var isNewLine = _whitespace.isNewLine;
+var nonASCIIwhitespace = _whitespace.nonASCIIwhitespace;
+
+// Object type used to represent tokens. Note that normally, tokens
+// simply exist as properties on the parser object. This is only
+// used for the onToken callback and the external tokenizer.
+
+var Token = exports.Token = function Token(p) {
+  _classCallCheck(this, Token);
+
+  this.type = p.type;
+  this.value = p.value;
+  this.start = p.start;
+  this.end = p.end;
+  if (p.options.locations) this.loc = new SourceLocation(p, p.startLoc, p.endLoc);
+  if (p.options.ranges) this.range = [p.start, p.end];
+};
+
+// ## Tokenizer
+
+var pp = Parser.prototype;
+
+// Move to the next token
+
+pp.next = function () {
+  if (this.options.onToken) this.options.onToken(new Token(this));
+
+  this.lastTokEnd = this.end;
+  this.lastTokStart = this.start;
+  this.lastTokEndLoc = this.endLoc;
+  this.lastTokStartLoc = this.startLoc;
+  this.nextToken();
+};
+
+pp.getToken = function () {
+  this.next();
+  return new Token(this);
+};
+
+// If we're in an ES6 environment, make parsers iterable
+if (typeof Symbol !== "undefined") pp[Symbol.iterator] = function () {
+  var self = this;
+  return { next: function next() {
+      var token = self.getToken();
+      return {
+        done: token.type === tt.eof,
+        value: token
+      };
+    } };
+};
+
+// Toggle strict mode. Re-reads the next number or string to please
+// pedantic tests (`"use strict"; 010;` should fail).
+
+pp.setStrict = function (strict) {
+  this.strict = strict;
+  if (this.type !== tt.num && this.type !== tt.string) return;
+  this.pos = this.start;
+  if (this.options.locations) {
+    while (this.pos < this.lineStart) {
+      this.lineStart = this.input.lastIndexOf("\n", this.lineStart - 2) + 1;
+      --this.curLine;
+    }
+  }
+  this.nextToken();
+};
+
+pp.curContext = function () {
+  return this.context[this.context.length - 1];
+};
+
+// Read a single token, updating the parser object's token-related
+// properties.
+
+pp.nextToken = function () {
+  var curContext = this.curContext();
+  if (!curContext || !curContext.preserveSpace) this.skipSpace();
+
+  this.start = this.pos;
+  if (this.options.locations) this.startLoc = this.curPosition();
+  if (this.pos >= this.input.length) return this.finishToken(tt.eof);
+
+  if (curContext.override) return curContext.override(this);else this.readToken(this.fullCharCodeAtPos());
+};
+
+pp.readToken = function (code) {
+  // Identifier or keyword. '\uXXXX' sequences are allowed in
+  // identifiers, so '\' also dispatches to that.
+  if (isIdentifierStart(code, this.options.ecmaVersion >= 6) || code === 92 /* '\' */) return this.readWord();
+
+  return this.getTokenFromCode(code);
+};
+
+pp.fullCharCodeAtPos = function () {
+  var code = this.input.charCodeAt(this.pos);
+  if (code <= 55295 || code >= 57344) return code;
+  var next = this.input.charCodeAt(this.pos + 1);
+  return (code << 10) + next - 56613888;
+};
+
+pp.skipBlockComment = function () {
+  var startLoc = this.options.onComment && this.options.locations && this.curPosition();
+  var start = this.pos,
+      end = this.input.indexOf("*/", this.pos += 2);
+  if (end === -1) this.raise(this.pos - 2, "Unterminated comment");
+  this.pos = end + 2;
+  if (this.options.locations) {
+    lineBreakG.lastIndex = start;
+    var match = undefined;
+    while ((match = lineBreakG.exec(this.input)) && match.index < this.pos) {
+      ++this.curLine;
+      this.lineStart = match.index + match[0].length;
+    }
+  }
+  if (this.options.onComment) this.options.onComment(true, this.input.slice(start + 2, end), start, this.pos, startLoc, this.options.locations && this.curPosition());
+};
+
+pp.skipLineComment = function (startSkip) {
+  var start = this.pos;
+  var startLoc = this.options.onComment && this.options.locations && this.curPosition();
+  var ch = this.input.charCodeAt(this.pos += startSkip);
+  while (this.pos < this.input.length && ch !== 10 && ch !== 13 && ch !== 8232 && ch !== 8233) {
+    ++this.pos;
+    ch = this.input.charCodeAt(this.pos);
+  }
+  if (this.options.onComment) this.options.onComment(false, this.input.slice(start + startSkip, this.pos), start, this.pos, startLoc, this.options.locations && this.curPosition());
+};
+
+// Called at the start of the parse and after every token. Skips
+// whitespace and comments, and.
+
+pp.skipSpace = function () {
+  while (this.pos < this.input.length) {
+    var ch = this.input.charCodeAt(this.pos);
+    if (ch === 32) {
+      // ' '
+      ++this.pos;
+    } else if (ch === 13) {
+      ++this.pos;
+      var next = this.input.charCodeAt(this.pos);
+      if (next === 10) {
+        ++this.pos;
+      }
+      if (this.options.locations) {
+        ++this.curLine;
+        this.lineStart = this.pos;
+      }
+    } else if (ch === 10 || ch === 8232 || ch === 8233) {
+      ++this.pos;
+      if (thi

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