gulpfile: add tests and notify

8 files changed, 13476 insertions, 18 deletions

diff --git a/web/bower.json b/web/bower.json
index 2d526289..6640bae2 100644
--- a/web/bower.json
+++ b/web/bower.json
@@ -17,7 +17,7 @@
         "path": "src/vendor",
         "sources": {
             "lodash": "bower_components/lodash/dist/lodash.js",
-            "react": "bower_components/react/react-with-addons.js",
+            "react": ["bower_components/react/react-with-addons.js", "bower_components/react/JSXTransformer.js"],
             "react-bootstrap": "bower_components/react-bootstrap/react-bootstrap.js"
         }
     }
diff --git a/web/gulpfile.js b/web/gulpfile.js
index 55a99b15..9ec2a0a7 100644
--- a/web/gulpfile.js
+++ b/web/gulpfile.js
@@ -6,12 +6,21 @@ var jshint = require("gulp-jshint");
 var less = require("gulp-less");
 var livereload = require("gulp-livereload");
 var minifyCSS = require('gulp-minify-css');
+var notify = require("gulp-notify");
 var plumber = require("gulp-plumber");
+var qunit = require("gulp-qunit");
 var react = require("gulp-react");
 var sourcemaps = require('gulp-sourcemaps');
 var uglify = require('gulp-uglify');
 
 
+var dont_break_on_errors = function(){
+    return plumber(function(error){
+        notify.onError("Error: <%= error.message %>").apply(this, arguments);
+        this.emit('end');
+    });
+};
+
 var path = {
     dist: "../libmproxy/web/",
     js: {
@@ -43,7 +52,7 @@ gulp.task("fonts", function () {
 
 function styles(files, dev) {
     return (gulp.src(files, {base: "src", cwd: "src"})
-        .pipe(plumber())
+        .pipe(dont_break_on_errors())
         .pipe(dev ? sourcemaps.init() : gutil.noop())
         .pipe(less())
         .pipe(dev ? sourcemaps.write(".", {sourceRoot: "/static"}) : gutil.noop())
@@ -62,7 +71,7 @@ gulp.task("styles-prod", ["styles-app-prod", "styles-vendor-prod"]);
 
 function scripts(files, filename, dev) {
     return gulp.src(files, {base: "src", cwd: "src"})
-        .pipe(plumber())
+        .pipe(dont_break_on_errors())
         .pipe(dev ? sourcemaps.init() : gutil.noop())
         .pipe(react({harmony: true}))
         .pipe(concat(filename))
@@ -80,7 +89,7 @@ gulp.task("scripts-prod", ["scripts-app-prod", "scripts-vendor-prod"]);
 
 gulp.task("jshint", function () {
     return gulp.src(["src/js/**"])
-        .pipe(plumber())
+        .pipe(dont_break_on_errors())
         .pipe(react({harmony: true}))
         .pipe(jshint())
         .pipe(jshint.reporter("jshint-stylish"))
@@ -92,6 +101,11 @@ gulp.task("html", function () {
         .pipe(livereload({ auto: false }));
 });
 
+gulp.task('test', function() {
+    return gulp.src('src/test.html')
+        .pipe(qunit({verbose: true}));
+});
+
 common = ["fonts", "html", "jshint"];
 gulp.task("dev", common.concat(["styles-dev", "scripts-dev"]));
 gulp.task("prod", common.concat(["styles-prod", "scripts-prod"]));
diff --git a/web/package.json b/web/package.json
index a13190bb..aef2c124 100644
--- a/web/package.json
+++ b/web/package.json
@@ -22,7 +22,9 @@
     "gulp-less": "^1.3.5",
     "gulp-livereload": "^2.1.1",
     "gulp-minify-css": "^0.3.8",
+    "gulp-notify": "^1.6.0",
     "gulp-plumber": "^0.6.5",
+    "gulp-qunit": "^0.3.3",
     "gulp-react": "^1.0.1",
     "gulp-sourcemaps": "^1.1.5",
     "gulp-uglify": "^1.0.1",
diff --git a/web/src/css/app.less b/web/src/css/app.less
index 0a25a90c..4efb8ceb 100644
--- a/web/src/css/app.less
+++ b/web/src/css/app.less
@@ -9,4 +9,5 @@ html {
 
 @import (less) "layout.less";
 @import (less) "header.less";
-@import (less) "footer.less";
\ No newline at end of file
+@import (less) "footer.less";
+
diff --git a/web/src/css/footer.less b/web/src/css/footer.less
index 52512b60..4c0035c8 100644
--- a/web/src/css/footer.less
+++ b/web/src/css/footer.less
@@ -1,4 +1,4 @@
 footer {
   padding: 0 10px;
-  text-align: center;
+  //text-align: center;
 }
\ No newline at end of file
diff --git a/web/src/js/tests.js b/web/src/js/tests.js
index 254bad72..ede323dc 100644
--- a/web/src/js/tests.js
+++ b/web/src/js/tests.js
@@ -1,5 +1,3 @@
-
-
 QUnit.test("example test", function (assert) {
     assert.ok(true);
 });
\ No newline at end of file
diff --git a/web/src/test.html b/web/src/test.html
index bba1e44f..53f7c54c 100644
--- a/web/src/test.html
+++ b/web/src/test.html
@@ -3,18 +3,15 @@
 <head>
   <meta charset="utf-8">
   <title>Unit Tests</title>
-  <link rel="stylesheet" href="vendor/qunit/qunit/qunit.css" type="text/css" />
-
+  <link rel="stylesheet" href="vendor/qunit/qunit.css" type="text/css" />
+  <script src="vendor/qunit/qunit.js"></script>
+  <script src="vendor/react/JSXTransformer.js"></script>
   <script src="vendor/jquery/jquery.js"></script>
-  <script src="vendor/underscore/underscore.js"></script>
-  <script src="vendor/lodash/dist/lodash.js"></script>
-  <script src="js/datastructures.es6.js"></script>
-  <script src="js/scurve.js"></script>
-  <script src="js/entropy.js"></script>
-  <script src="js/orders.js"></script>
-  <script src="js/fileview_jsx.js"></script>
+  <script src="vendor/lodash/lodash.js"></script>
+
+  <script type="text/jsx#harmony=true" src="js/datastructures.es6.js"></script>
+
 
-  <script src="vendor/qunit/qunit/qunit.js"></script>
   <script src="js/tests.js"></script>
 </head>
 <body>
diff --git a/web/src/vendor/react/JSXTransformer.js b/web/src/vendor/react/JSXTransformer.js
new file mode 100644
index 00000000..9a7bf5f0
--- /dev/null
+++ b/web/src/vendor/react/JSXTransformer.js
@@ -0,0 +1,13446 @@
+/**
+ * JSXTransformer v0.11.1
+ */
+!function(e){if("object"==typeof exports&&"undefined"!=typeof module)module.exports=e();else if("function"==typeof define&&define.amd)define([],e);else{var f;"undefined"!=typeof window?f=window:"undefined"!=typeof global?f=global:"undefined"!=typeof self&&(f=self),f.JSXTransformer=e()}}(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);throw new Error("Cannot find module '"+o+"'")}var f=n[o]={exports:{}};t[o][0].call(f.exports,function(e){var n=t[o][1][e];return s(n?n:e)},f,f.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 buffer module from node.js, for the browser.
+ *
+ * @author   Feross Aboukhadijeh <feross@feross.org> <http://feross.org>
+ * @license  MIT
+ */
+
+var base64 = _dereq_('base64-js')
+var ieee754 = _dereq_('ieee754')
+
+exports.Buffer = Buffer
+exports.SlowBuffer = Buffer
+exports.INSPECT_MAX_BYTES = 50
+Buffer.poolSize = 8192
+
+/**
+ * If `Buffer._useTypedArrays`:
+ *   === true    Use Uint8Array implementation (fastest)
+ *   === false   Use Object implementation (compatible down to IE6)
+ */
+Buffer._useTypedArrays = (function () {
+  // Detect if browser supports Typed Arrays. Supported browsers are IE 10+, Firefox 4+,
+  // Chrome 7+, Safari 5.1+, Opera 11.6+, iOS 4.2+. If the browser does not support adding
+  // properties to `Uint8Array` instances, then that's the same as no `Uint8Array` support
+  // because we need to be able to add all the node Buffer API methods. This is an issue
+  // in Firefox 4-29. Now fixed: https://bugzilla.mozilla.org/show_bug.cgi?id=695438
+  try {
+    var buf = new ArrayBuffer(0)
+    var arr = new Uint8Array(buf)
+    arr.foo = function () { return 42 }
+    return 42 === arr.foo() &&
+        typeof arr.subarray === 'function' // Chrome 9-10 lack `subarray`
+  } catch (e) {
+    return false
+  }
+})()
+
+/**
+ * Class: Buffer
+ * =============
+ *
+ * The Buffer constructor returns instances of `Uint8Array` that are augmented
+ * with function properties for all the node `Buffer` API functions. We use
+ * `Uint8Array` so that square bracket notation works as expected -- it returns
+ * a single octet.
+ *
+ * By augmenting the instances, we can avoid modifying the `Uint8Array`
+ * prototype.
+ */
+function Buffer (subject, encoding, noZero) {
+  if (!(this instanceof Buffer))
+    return new Buffer(subject, encoding, noZero)
+
+  var type = typeof subject
+
+  // Find the length
+  var length
+  if (type === 'number')
+    length = subject > 0 ? subject >>> 0 : 0
+  else if (type === 'string') {
+    if (encoding === 'base64')
+      subject = base64clean(subject)
+    length = Buffer.byteLength(subject, encoding)
+  } else if (type === 'object' && subject !== null) { // assume object is array-like
+    if (subject.type === 'Buffer' && Array.isArray(subject.data))
+      subject = subject.data
+    length = +subject.length > 0 ? Math.floor(+subject.length) : 0
+  } else
+    throw new Error('First argument needs to be a number, array or string.')
+
+  var buf
+  if (Buffer._useTypedArrays) {
+    // Preferred: Return an augmented `Uint8Array` instance for best performance
+    buf = Buffer._augment(new Uint8Array(length))
+  } else {
+    // Fallback: Return THIS instance of Buffer (created by `new`)
+    buf = this
+    buf.length = length
+    buf._isBuffer = true
+  }
+
+  var i
+  if (Buffer._useTypedArrays && typeof subject.byteLength === 'number') {
+    // Speed optimization -- use set if we're copying from a typed array
+    buf._set(subject)
+  } else if (isArrayish(subject)) {
+    // Treat array-ish objects as a byte array
+    if (Buffer.isBuffer(subject)) {
+      for (i = 0; i < length; i++)
+        buf[i] = subject.readUInt8(i)
+    } else {
+      for (i = 0; i < length; i++)
+        buf[i] = ((subject[i] % 256) + 256) % 256
+    }
+  } else if (type === 'string') {
+    buf.write(subject, 0, encoding)
+  } else if (type === 'number' && !Buffer._useTypedArrays && !noZero) {
+    for (i = 0; i < length; i++) {
+      buf[i] = 0
+    }
+  }
+
+  return buf
+}
+
+// STATIC METHODS
+// ==============
+
+Buffer.isEncoding = function (encoding) {
+  switch (String(encoding).toLowerCase()) {
+    case 'hex':
+    case 'utf8':
+    case 'utf-8':
+    case 'ascii':
+    case 'binary':
+    case 'base64':
+    case 'raw':
+    case 'ucs2':
+    case 'ucs-2':
+    case 'utf16le':
+    case 'utf-16le':
+      return true
+    default:
+      return false
+  }
+}
+
+Buffer.isBuffer = function (b) {
+  return !!(b != null && b._isBuffer)
+}
+
+Buffer.byteLength = function (str, encoding) {
+  var ret
+  str = str.toString()
+  switch (encoding || 'utf8') {
+    case 'hex':
+      ret = str.length / 2
+      break
+    case 'utf8':
+    case 'utf-8':
+      ret = utf8ToBytes(str).length
+      break
+    case 'ascii':
+    case 'binary':
+    case 'raw':
+      ret = str.length
+      break
+    case 'base64':
+      ret = base64ToBytes(str).length
+      break
+    case 'ucs2':
+    case 'ucs-2':
+    case 'utf16le':
+    case 'utf-16le':
+      ret = str.length * 2
+      break
+    default:
+      throw new Error('Unknown encoding')
+  }
+  return ret
+}
+
+Buffer.concat = function (list, totalLength) {
+  assert(isArray(list), 'Usage: Buffer.concat(list[, length])')
+
+  if (list.length === 0) {
+    return new Buffer(0)
+  } else if (list.length === 1) {
+    return list[0]
+  }
+
+  var i
+  if (totalLength === undefined) {
+    totalLength = 0
+    for (i = 0; i < list.length; i++) {
+      totalLength += list[i].length
+    }
+  }
+
+  var buf = new Buffer(totalLength)
+  var pos = 0
+  for (i = 0; i < list.length; i++) {
+    var item = list[i]
+    item.copy(buf, pos)
+    pos += item.length
+  }
+  return buf
+}
+
+Buffer.compare = function (a, b) {
+  assert(Buffer.isBuffer(a) && Buffer.isBuffer(b), 'Arguments must be Buffers')
+  var x = a.length
+  var y = b.length
+  for (var i = 0, len = Math.min(x, y); i < len && a[i] === b[i]; i++) {}
+  if (i !== len) {
+    x = a[i]
+    y = b[i]
+  }
+  if (x < y) {
+    return -1
+  }
+  if (y < x) {
+    return 1
+  }
+  return 0
+}
+
+// BUFFER INSTANCE METHODS
+// =======================
+
+function hexWrite (buf, string, offset, length) {
+  offset = Number(offset) || 0
+  var remaining = buf.length - offset
+  if (!length) {
+    length = remaining
+  } else {
+    length = Number(length)
+    if (length > remaining) {
+      length = remaining
+    }
+  }
+
+  // must be an even number of digits
+  var strLen = string.length
+  assert(strLen % 2 === 0, 'Invalid hex string')
+
+  if (length > strLen / 2) {
+    length = strLen / 2
+  }
+  for (var i = 0; i < length; i++) {
+    var byte = parseInt(string.substr(i * 2, 2), 16)
+    assert(!isNaN(byte), 'Invalid hex string')
+    buf[offset + i] = byte
+  }
+  return i
+}
+
+function utf8Write (buf, string, offset, length) {
+  var charsWritten = blitBuffer(utf8ToBytes(string), buf, offset, length)
+  return charsWritten
+}
+
+function asciiWrite (buf, string, offset, length) {
+  var charsWritten = blitBuffer(asciiToBytes(string), buf, offset, length)
+  return charsWritten
+}
+
+function binaryWrite (buf, string, offset, length) {
+  return asciiWrite(buf, string, offset, length)
+}
+
+function base64Write (buf, string, offset, length) {
+  var charsWritten = blitBuffer(base64ToBytes(string), buf, offset, length)
+  return charsWritten
+}
+
+function utf16leWrite (buf, string, offset, length) {
+  var charsWritten = blitBuffer(utf16leToBytes(string), buf, offset, length)
+  return charsWritten
+}
+
+Buffer.prototype.write = function (string, offset, length, encoding) {
+  // Support both (string, offset, length, encoding)
+  // and the legacy (string, encoding, offset, length)
+  if (isFinite(offset)) {
+    if (!isFinite(length)) {
+      encoding = length
+      length = undefined
+    }
+  } else {  // legacy
+    var swap = encoding
+    encoding = offset
+    offset = length
+    length = swap
+  }
+
+  offset = Number(offset) || 0
+  var remaining = this.length - offset
+  if (!length) {
+    length = remaining
+  } else {
+    length = Number(length)
+    if (length > remaining) {
+      length = remaining
+    }
+  }
+  encoding = String(encoding || 'utf8').toLowerCase()
+
+  var ret
+  switch (encoding) {
+    case 'hex':
+      ret = hexWrite(this, string, offset, length)
+      break
+    case 'utf8':
+    case 'utf-8':
+      ret = utf8Write(this, string, offset, length)
+      break
+    case 'ascii':
+      ret = asciiWrite(this, string, offset, length)
+      break
+    case 'binary':
+      ret = binaryWrite(this, string, offset, length)
+      break
+    case 'base64':
+      ret = base64Write(this, string, offset, length)
+      break
+    case 'ucs2':
+    case 'ucs-2':
+    case 'utf16le':
+    case 'utf-16le':
+      ret = utf16leWrite(this, string, offset, length)
+      break
+    default:
+      throw new Error('Unknown encoding')
+  }
+  return ret
+}
+
+Buffer.prototype.toString = function (encoding, start, end) {
+  var self = this
+
+  encoding = String(encoding || 'utf8').toLowerCase()
+  start = Number(start) || 0
+  end = (end === undefined) ? self.length : Number(end)
+
+  // Fastpath empty strings
+  if (end === start)
+    return ''
+
+  var ret
+  switch (encoding) {
+    case 'hex':
+      ret = hexSlice(self, start, end)
+      break
+    case 'utf8':
+    case 'utf-8':
+      ret = utf8Slice(self, start, end)
+      break
+    case 'ascii':
+      ret = asciiSlice(self, start, end)
+      break
+    case 'binary':
+      ret = binarySlice(self, start, end)
+      break
+    case 'base64':
+      ret = base64Slice(self, start, end)
+      break
+    case 'ucs2':
+    case 'ucs-2':
+    case 'utf16le':
+    case 'utf-16le':
+      ret = utf16leSlice(self, start, end)
+      break
+    default:
+      throw new Error('Unknown encoding')
+  }
+  return ret
+}
+
+Buffer.prototype.toJSON = function () {
+  return {
+    type: 'Buffer',
+    data: Array.prototype.slice.call(this._arr || this, 0)
+  }
+}
+
+Buffer.prototype.equals = function (b) {
+  assert(Buffer.isBuffer(b), 'Argument must be a Buffer')
+  return Buffer.compare(this, b) === 0
+}
+
+Buffer.prototype.compare = function (b) {
+  assert(Buffer.isBuffer(b), 'Argument must be a Buffer')
+  return Buffer.compare(this, b)
+}
+
+// copy(targetBuffer, targetStart=0, sourceStart=0, sourceEnd=buffer.length)
+Buffer.prototype.copy = function (target, target_start, start, end) {
+  var source = this
+
+  if (!start) start = 0
+  if (!end && end !== 0) end = this.length
+  if (!target_start) target_start = 0
+
+  // Copy 0 bytes; we're done
+  if (end === start) return
+  if (target.length === 0 || source.length === 0) return
+
+  // Fatal error conditions
+  assert(end >= start, 'sourceEnd < sourceStart')
+  assert(target_start >= 0 && target_start < target.length,
+      'targetStart out of bounds')
+  assert(start >= 0 && start < source.length, 'sourceStart out of bounds')
+  assert(end >= 0 && end <= source.length, 'sourceEnd out of bounds')
+
+  // Are we oob?
+  if (end > this.length)
+    end = this.length
+  if (target.length - target_start < end - start)
+    end = target.length - target_start + start
+
+  var len = end - start
+
+  if (len < 100 || !Buffer._useTypedArrays) {
+    for (var i = 0; i < len; i++) {
+      target[i + target_start] = this[i + start]
+    }
+  } else {
+    target._set(this.subarray(start, start + len), target_start)
+  }
+}
+
+function base64Slice (buf, start, end) {
+  if (start === 0 && end === buf.length) {
+    return base64.fromByteArray(buf)
+  } else {
+    return base64.fromByteArray(buf.slice(start, end))
+  }
+}
+
+function utf8Slice (buf, start, end) {
+  var res = ''
+  var tmp = ''
+  end = Math.min(buf.length, end)
+
+  for (var i = start; i < end; i++) {
+    if (buf[i] <= 0x7F) {
+      res += decodeUtf8Char(tmp) + String.fromCharCode(buf[i])
+      tmp = ''
+    } else {
+      tmp += '%' + buf[i].toString(16)
+    }
+  }
+
+  return res + decodeUtf8Char(tmp)
+}
+
+function asciiSlice (buf, start, end) {
+  var ret = ''
+  end = Math.min(buf.length, end)
+
+  for (var i = start; i < end; i++) {
+    ret += String.fromCharCode(buf[i])
+  }
+  return ret
+}
+
+function binarySlice (buf, start, end) {
+  return asciiSlice(buf, start, end)
+}
+
+function hexSlice (buf, start, end) {
+  var len = buf.length
+
+  if (!start || start < 0) start = 0
+  if (!end || end < 0 || end > len) end = len
+
+  var out = ''
+  for (var i = start; i < end; i++) {
+    out += toHex(buf[i])
+  }
+  return out
+}
+
+function utf16leSlice (buf, start, end) {
+  var bytes = buf.slice(start, end)
+  var res = ''
+  for (var i = 0; i < bytes.length; i += 2) {
+    res += String.fromCharCode(bytes[i] + bytes[i + 1] * 256)
+  }
+  return res
+}
+
+Buffer.prototype.slice = function (start, end) {
+  var len = this.length
+  start = ~~start
+  end = end === undefined ? len : ~~end
+
+  if (start < 0) {
+    start += len;
+    if (start < 0)
+      start = 0
+  } else if (start > len) {
+    start = len
+  }
+
+  if (end < 0) {
+    end += len
+    if (end < 0)
+      end = 0
+  } else if (end > len) {
+    end = len
+  }
+
+  if (end < start)
+    end = start
+
+  if (Buffer._useTypedArrays) {
+    return Buffer._augment(this.subarray(start, end))
+  } else {
+    var sliceLen = end - start
+    var newBuf = new Buffer(sliceLen, undefined, true)
+    for (var i = 0; i < sliceLen; i++) {
+      newBuf[i] = this[i + start]
+    }
+    return newBuf
+  }
+}
+
+// `get` will be removed in Node 0.13+
+Buffer.prototype.get = function (offset) {
+  console.log('.get() is deprecated. Access using array indexes instead.')
+  return this.readUInt8(offset)
+}
+
+// `set` will be removed in Node 0.13+
+Buffer.prototype.set = function (v, offset) {
+  console.log('.set() is deprecated. Access using array indexes instead.')
+  return this.writeUInt8(v, offset)
+}
+
+Buffer.prototype.readUInt8 = function (offset, noAssert) {
+  if (!noAssert) {
+    assert(offset !== undefined && offset !== null, 'missing offset')
+    assert(offset < this.length, 'Trying to read beyond buffer length')
+  }
+
+  if (offset >= this.length)
+    return
+
+  return this[offset]
+}
+
+function readUInt16 (buf, offset, littleEndian, noAssert) {
+  if (!noAssert) {
+    assert(typeof littleEndian === 'boolean', 'missing or invalid endian')
+    assert(offset !== undefined && offset !== null, 'missing offset')
+    assert(offset + 1 < buf.length, 'Trying to read beyond buffer length')
+  }
+
+  var len = buf.length
+  if (offset >= len)
+    return
+
+  var val
+  if (littleEndian) {
+    val = buf[offset]
+    if (offset + 1 < len)
+      val |= buf[offset + 1] << 8
+  } else {
+    val = buf[offset] << 8
+    if (offset + 1 < len)
+      val |= buf[offset + 1]
+  }
+  return val
+}
+
+Buffer.prototype.readUInt16LE = function (offset, noAssert) {
+  return readUInt16(this, offset, true, noAssert)
+}
+
+Buffer.prototype.readUInt16BE = function (offset, noAssert) {
+  return readUInt16(this, offset, false, noAssert)
+}
+
+function readUInt32 (buf, offset, littleEndian, noAssert) {
+  if (!noAssert) {
+    assert(typeof littleEndian === 'boolean', 'missing or invalid endian')
+    assert(offset !== undefined && offset !== null, 'missing offset')
+    assert(offset + 3 < buf.length, 'Trying to read beyond buffer length')
+  }
+
+  var len = buf.length
+  if (offset >= len)
+    return
+
+  var val
+  if (littleEndian) {
+    if (offset + 2 < len)
+      val = buf[offset + 2] << 16
+    if (offset + 1 < len)
+      val |= buf[offset + 1] << 8
+    val |= buf[offset]
+    if (offset + 3 < len)
+      val = val + (buf[offset + 3] << 24 >>> 0)
+  } else {
+    if (offset + 1 < len)
+      val = buf[offset + 1] << 16
+    if (offset + 2 < len)
+      val |= buf[offset + 2] << 8
+    if (offset + 3 < len)
+      val |= buf[offset + 3]
+    val = val + (buf[offset] << 24 >>> 0)
+  }
+  return val
+}
+
+Buffer.prototype.readUInt32LE = function (offset, noAssert) {
+  return readUInt32(this, offset, true, noAssert)
+}
+
+Buffer.prototype.readUInt32BE = function (offset, noAssert) {
+  return readUInt32(this, offset, false, noAssert)
+}
+
+Buffer.prototype.readInt8 = function (offset, noAssert) {
+  if (!noAssert) {
+    assert(offset !== undefined && offset !== null,
+        'missing offset')
+    assert(offset < this.length, 'Trying to read beyond buffer length')
+  }
+
+  if (offset >= this.length)
+    return
+
+  var neg = this[offset] & 0x80
+  if (neg)
+    return (0xff - this[offset] + 1) * -1
+  else
+    return this[offset]
+}
+
+function readInt16 (buf, offset, littleEndian, noAssert) {
+  if (!noAssert) {
+    assert(typeof littleEndian === 'boolean', 'missing or invalid endian')
+    assert(offset !== undefined && offset !== null, 'missing offset')
+    assert(offset + 1 < buf.length, 'Trying to read beyond buffer length')
+  }
+
+  var len = buf.length
+  if (offset >= len)
+    return
+
+  var val = readUInt16(buf, offset, littleEndian, true)
+  var neg = val & 0x8000
+  if (neg)
+    return (0xffff - val + 1) * -1
+  else
+    return val
+}
+
+Buffer.prototype.readInt16LE = function (offset, noAssert) {
+  return readInt16(this, offset, true, noAssert)
+}
+
+Buffer.prototype.readInt16BE = function (offset, noAssert) {
+  return readInt16(this, offset, false, noAssert)
+}
+
+function readInt32 (buf, offset, littleEndian, noAssert) {
+  if (!noAssert) {
+    assert(typeof littleEndian === 'boolean', 'missing or invalid endian')
+    assert(offset !== undefined && offset !== null, 'missing offset')
+    assert(offset + 3 < buf.length, 'Trying to read beyond buffer length')
+  }
+
+  var len = buf.length
+  if (offset >= len)
+    return
+
+  var val = readUInt32(buf, offset, littleEndian, true)
+  var neg = val & 0x80000000
+  if (neg)
+    return (0xffffffff - val + 1) * -1
+  else
+    return val
+}
+
+Buffer.prototype.readInt32LE = function (offset, noAssert) {
+  return readInt32(this, offset, true, noAssert)
+}
+
+Buffer.prototype.readInt32BE = function (offset, noAssert) {
+  return readInt32(this, offset, false, noAssert)
+}
+
+function readFloat (buf, offset, littleEndian, noAssert) {
+  if (!noAssert) {
+    assert(typeof littleEndian === 'boolean', 'missing or invalid endian')
+    assert(offset + 3 < buf.length, 'Trying to read beyond buffer length')
+  }
+
+  return ieee754.read(buf, offset, littleEndian, 23, 4)
+}
+
+Buffer.prototype.readFloatLE = function (offset, noAssert) {
+  return readFloat(this, offset, true, noAssert)
+}
+
+Buffer.prototype.readFloatBE = function (offset, noAssert) {
+  return readFloat(this, offset, false, noAssert)
+}
+
+function readDouble (buf, offset, littleEndian, noAssert) {
+  if (!noAssert) {
+    assert(typeof littleEndian === 'boolean', 'missing or invalid endian')
+    assert(offset + 7 < buf.length, 'Trying to read beyond buffer length')
+  }
+
+  return ieee754.read(buf, offset, littleEndian, 52, 8)
+}
+
+Buffer.prototype.readDoubleLE = function (offset, noAssert) {
+  return readDouble(this, offset, true, noAssert)
+}
+
+Buffer.prototype.readDoubleBE = function (offset, noAssert) {
+  return readDouble(this, offset, false, noAssert)
+}
+
+Buffer.prototype.writeUInt8 = function (value, offset, noAssert) {
+  if (!noAssert) {
+    assert(value !== undefined && value !== null, 'missing value')
+    assert(offset !== undefined && offset !== null, 'missing offset')
+    assert(offset < this.length, 'trying to write beyond buffer length')
+    verifuint(value, 0xff)
+  }
+
+  if (offset >= this.length) return
+
+  this[offset] = value
+  return offset + 1
+}
+
+function writeUInt16 (buf, value, offset, littleEndian, noAssert) {
+  if (!noAssert) {
+    assert(value !== undefined && value !== null, 'missing value')
+    assert(typeof littleEndian === 'boolean', 'missing or invalid endian')
+    assert(offset !== undefined && offset !== null, 'missing offset')
+    assert(offset + 1 < buf.length, 'trying to write beyond buffer length')
+    verifuint(value, 0xffff)
+  }
+
+  var len = buf.length
+  if (offset >= len)
+    return
+
+  for (var i = 0, j = Math.min(len - offset, 2); i < j; i++) {
+    buf[offset + i] =
+        (value & (0xff << (8 * (littleEndian ? i : 1 - i)))) >>>
+            (littleEndian ? i : 1 - i) * 8
+  }
+  return offset + 2
+}
+
+Buffer.prototype.writeUInt16LE = function (value, offset, noAssert) {
+  return writeUInt16(this, value, offset, true, noAssert)
+}
+
+Buffer.prototype.writeUInt16BE = function (value, offset, noAssert) {
+  return writeUInt16(this, value, offset, false, noAssert)
+}
+
+function writeUInt32 (buf, value, offset, littleEndian, noAssert) {
+  if (!noAssert) {
+    assert(value !== undefined && value !== null, 'missing value')
+    assert(typeof littleEndian === 'boolean', 'missing or invalid endian')
+    assert(offset !== undefined && offset !== null, 'missing offset')
+    assert(offset + 3 < buf.length, 'trying to write beyond buffer length')
+    verifuint(value, 0xffffffff)
+  }
+
+  var len = buf.length
+  if (offset >= len)
+    return
+
+  for (var i = 0, j = Math.min(len - offset, 4); i < j; i++) {
+    buf[offset + i] =
+        (value >>> (littleEndian ? i : 3 - i) * 8) & 0xff
+  }
+  return offset + 4
+}
+
+Buffer.prototype.writeUInt32LE = function (value, offset, noAssert) {
+  return writeUInt32(this, value, offset, true, noAssert)
+}
+
+Buffer.prototype.writeUInt32BE = function (value, offset, noAssert) {
+  return writeUInt32(this, value, offset, false, noAssert)
+}
+
+Buffer.prototype.writeInt8 = function (value, offset, noAssert) {
+  if (!noAssert) {
+    assert(value !== undefined && value !== null, 'missing value')
+    assert(offset !== undefined && offset !== null, 'missing offset')
+    assert(offset < this.length, 'Trying to write beyond buffer length')
+    verifsint(value, 0x7f, -0x80)
+  }
+
+  if (offset >= this.length)
+    return
+
+  if (value >= 0)
+    this.writeUInt8(value, offset, noAssert)
+  else
+    this.writeUInt8(0xff + value + 1, offset, noAssert)
+  return offset + 1
+}
+
+function writeInt16 (buf, value, offset, littleEndian, noAssert) {
+  if (!noAssert) {
+    assert(value !== undefined && value !== null, 'missing value')
+    assert(typeof littleEndian === 'boolean', 'missing or invalid endian')
+    assert(offset !== undefined && offset !== null, 'missing offset')
+    assert(offset + 1 < buf.length, 'Trying to write beyond buffer length')
+    verifsint(value, 0x7fff, -0x8000)
+  }
+
+  var len = buf.length
+  if (offset >= len)
+    return
+
+  if (value >= 0)
+    writeUInt16(buf, value, offset, littleEndian, noAssert)
+  else
+    writeUInt16(buf, 0xffff + value + 1, offset, littleEndian, noAssert)
+  return offset + 2
+}
+
+Buffer.prototype.writeInt16LE = function (value, offset, noAssert) {
+  return writeInt16(this, value, offset, true, noAssert)
+}
+
+Buffer.prototype.writeInt16BE = function (value, offset, noAssert) {
+  return writeInt16(this, value, offset, false, noAssert)
+}
+
+function writeInt32 (buf, value, offset, littleEndian, noAssert) {
+  if (!noAssert) {
+    assert(value !== undefined && value !== null, 'missing value')
+    assert(typeof littleEndian === 'boolean', 'missing or invalid endian')
+    assert(offset !== undefined && offset !== null, 'missing offset')
+    assert(offset + 3 < buf.length, 'Trying to write beyond buffer length')
+    verifsint(value, 0x7fffffff, -0x80000000)
+  }
+
+  var len = buf.length
+  if (offset >= len)
+    return
+
+  if (value >= 0)
+    writeUInt32(buf, value, offset, littleEndian, noAssert)
+  else
+    writeUInt32(buf, 0xffffffff + value + 1, offset, littleEndian, noAssert)
+  return offset + 4
+}
+
+Buffer.prototype.writeInt32LE = function (value, offset, noAssert) {
+  return writeInt32(this, value, offset, true, noAssert)
+}
+
+Buffer.prototype.writeInt32BE = function (value, offset, noAssert) {
+  return writeInt32(this, value, offset, false, noAssert)
+}
+
+function writeFloat (buf, value, offset, littleEndian, noAssert) {
+  if (!noAssert) {
+    assert(value !== undefined && value !== null, 'missing value')
+    assert(typeof littleEndian === 'boolean', 'missing or invalid endian')
+    assert(offset !== undefined && offset !== null, 'missing offset')
+    assert(offset + 3 < buf.length, 'Trying to write beyond buffer length')
+    verifIEEE754(value, 3.4028234663852886e+38, -3.4028234663852886e+38)
+  }
+
+  var len = buf.length
+  if (offset >= len)
+    return
+
+  ieee754.write(buf, value, offset, littleEndian, 23, 4)
+  return offset + 4
+}
+
+Buffer.prototype.writeFloatLE = function (value, offset, noAssert) {
+  return writeFloat(this, value, offset, true, noAssert)
+}
+
+Buffer.prototype.writeFloatBE = function (value, offset, noAssert) {
+  return writeFloat(this, value, offset, false, noAssert)
+}
+
+function writeDouble (buf, value, offset, littleEndian, noAssert) {
+  if (!noAssert) {
+    assert(value !== undefined && value !== null, 'missing value')
+    assert(typeof littleEndian === 'boolean', 'missing or invalid endian')
+    assert(offset !== undefined && offset !== null, 'missing offset')
+    assert(offset + 7 < buf.length,
+        'Trying to write beyond buffer length')
+    verifIEEE754(value, 1.7976931348623157E+308, -1.7976931348623157E+308)
+  }
+
+  var len = buf.length
+  if (offset >= len)
+    return
+
+  ieee754.write(buf, value, offset, littleEndian, 52, 8)
+  return offset + 8
+}
+
+Buffer.prototype.writeDoubleLE = function (value, offset, noAssert) {
+  return writeDouble(this, value, offset, true, noAssert)
+}
+
+Buffer.prototype.writeDoubleBE = function (value, offset, noAssert) {
+  return writeDouble(this, value, offset, false, noAssert)
+}
+
+// fill(value, start=0, end=buffer.length)
+Buffer.prototype.fill = function (value, start, end) {
+  if (!value) value = 0
+  if (!start) start = 0
+  if (!end) end = this.length
+
+  assert(end >= start, 'end < start')
+
+  // Fill 0 bytes; we're done
+  if (end === start) return
+  if (this.length === 0) return
+
+  assert(start >= 0 && start < this.length, 'start out of bounds')
+  assert(end >= 0 && end <= this.length, 'end out of bounds')
+
+  var i
+  if (typeof value === 'number') {
+    for (i = start; i < end; i++) {
+      this[i] = value
+    }
+  } else {
+    var bytes = utf8ToBytes(value.toString())
+    var len = bytes.length
+    for (i = start; i < end; i++) {
+      this[i] = bytes[i % len]
+    }
+  }
+
+  return this
+}
+
+Buffer.prototype.inspect = function () {
+  var out = []
+  var len = this.length
+  for (var i = 0; i < len; i++) {
+    out[i] = toHex(this[i])
+    if (i === exports.INSPECT_MAX_BYTES) {
+      out[i + 1] = '...'
+      break
+    }
+  }
+  return '<Buffer ' + out.join(' ') + '>'
+}
+
+/**
+ * Creates a new `ArrayBuffer` with the *copied* memory of the buffer instance.
+ * Added in Node 0.12. Only available in browsers that support ArrayBuffer.
+ */
+Buffer.prototype.toArrayBuffer = function () {
+  if (typeof Uint8Array !== 'undefined') {
+    if (Buffer._useTypedArrays) {
+      return (new Buffer(this)).buffer
+    } else {
+      var buf = new Uint8Array(this.length)
+      for (var i = 0, len = buf.length; i < len; i += 1) {
+        buf[i] = this[i]
+      }
+      return buf.buffer
+    }
+  } else {
+    throw new Error('Buffer.toArrayBuffer not supported in this browser')
+  }
+}
+
+// HELPER FUNCTIONS
+// ================
+
+var BP = Buffer.prototype
+
+/**
+ * Augment a Uint8Array *instance* (not the Uint8Array class!) with Buffer methods
+ */
+Buffer._augment = function (arr) {
+  arr._isBuffer = true
+
+  // save reference to original Uint8Array get/set methods before overwriting
+  arr._get = arr.get
+  arr._set = arr.set
+
+  // deprecated, will be removed in node 0.13+
+  arr.get = BP.get
+  arr.set = BP.set
+
+  arr.write = BP.write
+  arr.toString = BP.toString
+  arr.toLocaleString = BP.toString
+  arr.toJSON = BP.toJSON
+  arr.equals = BP.equals
+  arr.compare = BP.compare
+  arr.copy = BP.copy
+  arr.slice = BP.slice
+  arr.readUInt8 = BP.readUInt8
+  arr.readUInt16LE = BP.readUInt16LE
+  arr.readUInt16BE = BP.readUInt16BE
+  arr.readUInt32LE = BP.readUInt32LE
+  arr.readUInt32BE = BP.readUInt32BE
+  arr.readInt8 = BP.readInt8
+  arr.readInt16LE = BP.readInt16LE
+  arr.readInt16BE = BP.readInt16BE
+  arr.readInt32LE = BP.readInt32LE
+  arr.readInt32BE = BP.readInt32BE
+  arr.readFloatLE = BP.readFloatLE
+  arr.readFloatBE = BP.readFloatBE
+  arr.readDoubleLE = BP.readDoubleLE
+  arr.readDoubleBE = BP.readDoubleBE
+  arr.writeUInt8 = BP.writeUInt8
+  arr.writeUInt16LE = BP.writeUInt16LE
+  arr.writeUInt16BE = BP.writeUInt16BE
+  arr.writeUInt32LE = BP.writeUInt32LE
+  arr.writeUInt32BE = BP.writeUInt32BE
+  arr.writeInt8 = BP.writeInt8
+  arr.writeInt16LE = BP.writeInt16LE
+  arr.writeInt16BE = BP.writeInt16BE
+  arr.writeInt32LE = BP.writeInt32LE
+  arr.writeInt32BE = BP.writeInt32BE
+  arr.writeFloatLE = BP.writeFloatLE
+  arr.writeFloatBE = BP.writeFloatBE
+  arr.writeDoubleLE = BP.writeDoubleLE
+  arr.writeDoubleBE = BP.writeDoubleBE
+  arr.fill = BP.fill
+  arr.inspect = BP.inspect
+  arr.toArrayBuffer = BP.toArrayBuffer
+
+  return arr
+}
+
+var INVALID_BASE64_RE = /[^+\/0-9A-z]/g
+
+function base64clean (str) {
+  // Node strips out invalid characters like \n and \t from the string, base64-js does not
+  str = stringtrim(str).replace(INVALID_BASE64_RE, '')
+  // Node allows for non-padded base64 strings (missing trailing ===), base64-js does not
+  while (str.length % 4 !== 0) {
+    str = str + '='
+  }
+  return str
+}
+
+function stringtrim (str) {
+  if (str.trim) return str.trim()
+  return str.replace(/^\s+|\s+$/g, '')
+}
+
+function isArray (subject) {
+  return (Array.isArray || function (subject) {
+    return Object.prototype.toString.call(subject) === '[object Array]'
+  })(subject)
+}
+
+function isArrayish (subject) {
+  return isArray(subject) || Buffer.isBuffer(subject) ||
+      subject && typeof subject === 'object' &&
+      typeof subject.length === 'number'
+}
+
+function toHex (n) {
+  if (n < 16) return '0' + n.toString(16)
+  return n.toString(16)
+}
+
+function utf8ToBytes (str) {
+  var byteArray = []
+  for (var i = 0; i < str.length; i++) {
+    var b = str.charCodeAt(i)
+    if (b <= 0x7F) {
+      byteArray.push(b)
+    } else {
+      var start = i
+      if (b >= 0xD800 && b <= 0xDFFF) i++
+      var h = encodeURIComponent(str.slice(start, i+1)).substr(1).split('%')
+      for (var j = 0; j < h.length; j++) {
+        byteArray.push(parseInt(h[j], 16))
+      }
+    }
+  }
+  return byteArray
+}
+
+function asciiToBytes (str) {
+  var byteArray = []
+  for (var i = 0; i < str.length; i++) {
+    // Node's code seems to be doing this and not & 0x7F..
+    byteArray.push(str.charCodeAt(i) & 0xFF)
+  }
+  return byteArray
+}
+
+function utf16leToBytes (str) {
+  var c, hi, lo
+  var byteArray = []
+  for (var i = 0; i < str.length; i++) {
+    c = str.charCodeAt(i)
+    hi = c >> 8
+    lo = c % 256
+    byteArray.push(lo)
+    byteArray.push(hi)
+  }
+
+  return byteArray
+}
+
+function base64ToBytes (str) {
+  return base64.toByteArray(str)
+}
+
+function blitBuffer (src, dst, offset, length) {
+  for (var i = 0; i < length; i++) {
+    if ((i + offset >= dst.length) || (i >= src.length))
+      break
+    dst[i + offset] = src[i]
+  }
+  return i
+}
+
+function decodeUtf8Char (str) {
+  try {
+    return decodeURIComponent(str)
+  } catch (err) {
+    return String.fromCharCode(0xFFFD) // UTF 8 invalid char
+  }
+}
+
+/*
+ * We have to make sure that the value is a valid integer. This means that it
+ * is non-negative. It has no fractional component and that it does not
+ * exceed the maximum allowed value.
+ */
+function verifuint (value, max) {
+  assert(typeof value === 'number', 'cannot write a non-number as a number')
+  assert(value >= 0, 'specified a negative value for writing an unsigned value')
+  assert(value <= max, 'value is larger than maximum value for type')
+  assert(Math.floor(value) === value, 'value has a fractional component')
+}
+
+function verifsint (value, max, min) {
+  assert(typeof value === 'number', 'cannot write a non-number as a number')
+  assert(value <= max, 'value larger than maximum allowed value')
+  assert(value >= min, 'value smaller than minimum allowed value')
+  assert(Math.floor(value) === value, 'value has a fractional component')
+}
+
+function verifIEEE754 (value, max, min) {
+  assert(typeof value === 'number', 'cannot write a non-number as a number')
+  assert(value <= max, 'value larger than maximum allowed value')
+  assert(value >= min, 'value smaller than minimum allowed value')
+}
+
+function assert (test, message) {
+  if (!test) throw new Error(message || 'Failed assertion')
+}
+
+},{"base64-js":2,"ieee754":3}],2:[function(_dereq_,module,exports){
+var lookup = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
+
+;(function (exports) {
+	'use strict';
+
+  var Arr = (typeof Uint8Array !== 'undefined')
+    ? Uint8Array
+    : Array
+
+	var PLUS   = '+'.charCodeAt(0)
+	var SLASH  = '/'.charCodeAt(0)
+	var NUMBER = '0'.charCodeAt(0)
+	var LOWER  = 'a'.charCodeAt(0)
+	var UPPER  = 'A'.charCodeAt(0)
+
+	function decode (elt) {
+		var code = elt.charCodeAt(0)
+		if (code === PLUS)
+			return 62 // '+'
+		if (code === SLASH)
+			return 63 // '/'
+		if (code < NUMBER)
+			return -1 //no match
+		if (code < NUMBER + 10)
+			return code - NUMBER + 26 + 26
+		if (code < UPPER + 26)
+			return code - UPPER
+		if (code < LOWER + 26)
+			return code - LOWER + 26
+	}
+
+	function b64ToByteArray (b64) {
+		var i, j, l, tmp, placeHolders, arr
+
+		if (b64.length % 4 > 0) {
+			throw new Error('Invalid string. Length must be a multiple of 4')
+		}
+
+		// the number of equal signs (place holders)
+		// if there are two placeholders, than the two characters before it
+		// represent one byte
+		// if there is only one, then the three characters before it represent 2 bytes
+		// this is just a cheap hack to not do indexOf twice
+		var len = b64.length
+		placeHolders = '=' === b64.charAt(len - 2) ? 2 : '=' === b64.charAt(len - 1) ? 1 : 0
+
+		// base64 is 4/3 + up to two characters of the original data
+		arr = new Arr(b64.length * 3 / 4 - placeHolders)
+
+		// if there are placeholders, only get up to the last complete 4 chars
+		l = placeHolders > 0 ? b64.length - 4 : b64.length
+
+		var L = 0
+
+		function push (v) {
+			arr[L++] = v
+		}
+
+		for (i = 0, j = 0; i < l; i += 4, j += 3) {
+			tmp = (decode(b64.charAt(i)) << 18) | (decode(b64.charAt(i + 1)) << 12) | (decode(b64.charAt(i + 2)) << 6) | decode(b64.charAt(i + 3))
+			push((tmp & 0xFF0000) >> 16)
+			push((tmp & 0xFF00) >> 8)
+			push(tmp & 0xFF)
+		}
+
+		if (placeHolders === 2) {
+			tmp = (decode(b64.charAt(i)) << 2) | (decode(b64.charAt(i + 1)) >> 4)
+			push(tmp & 0xFF)
+		} else if (placeHolders === 1) {
+			tmp = (decode(b64.charAt(i)) << 10) | (decode(b64.charAt(i + 1)) << 4) | (decode(b64.charAt(i + 2)) >> 2)
+			push((tmp >> 8) & 0xFF)
+			push(tmp & 0xFF)
+		}
+
+		return arr
+	}
+
+	function uint8ToBase64 (uint8) {
+		var i,
+			extraBytes = uint8.length % 3, // if we have 1 byte left, pad 2 bytes
+			output = "",
+			temp, length
+
+		function encode (num) {
+			return lookup.charAt(num)
+		}
+
+		function tripletToBase64 (num) {
+			return encode(num >> 18 & 0x3F) + encode(num >> 12 & 0x3F) + encode(num >> 6 & 0x3F) + encode(num & 0x3F)
+		}
+
+		// go through the array every three bytes, we'll deal with trailing stuff later
+		for (i = 0, length = uint8.length - extraBytes; i < length; i += 3) {
+			temp = (uint8[i] << 16) + (uint8[i + 1] << 8) + (uint8[i + 2])
+			output += tripletToBase64(temp)
+		}
+
+		// pad the end with zeros, but make sure to not forget the extra bytes
+		switch (extraBytes) {
+			case 1:
+				temp = uint8[uint8.length - 1]
+				output += encode(temp >> 2)
+				output += encode((temp << 4) & 0x3F)
+				output += '=='
+				break
+			case 2:
+				temp = (uint8[uint8.length - 2] << 8) + (uint8[uint8.length - 1])
+				output += encode(temp >> 10)
+				output += encode((temp >> 4) & 0x3F)
+				output += encode((temp << 2) & 0x3F)
+				output += '='
+				break
+		}
+
+		return output
+	}
+
+	exports.toByteArray = b64ToByteArray
+	exports.fromByteArray = uint8ToBase64
+}(typeof exports === 'undefined' ? (this.base64js = {}) : exports))
+
+},{}],3:[function(_dereq_,module,exports){
+exports.read = function(buffer, offset, isLE, mLen, nBytes) {
+  var e, m,
+      eLen = nBytes * 8 - mLen - 1,
+      eMax = (1 << eLen) - 1,
+      eBias = eMax >> 1,
+      nBits = -7,
+      i = isLE ? (nBytes - 1) : 0,
+      d = isLE ? -1 : 1,
+      s = buffer[offset + i];
+
+  i += d;
+
+  e = s & ((1 << (-nBits)) - 1);
+  s >>= (-nBits);
+  nBits += eLen;
+  for (; nBits > 0; e = e * 256 + buffer[offset + i], i += d, nBits -= 8);
+
+  m = e & ((1 << (-nBits)) - 1);
+  e >>= (-nBits);
+  nBits += mLen;
+  for (; nBits > 0; m = m * 256 + buffer[offset + i], i += d, nBits -= 8);
+
+  if (e === 0) {
+    e = 1 - eBias;
+  } else if (e === eMax) {
+    return m ? NaN : ((s ? -1 : 1) * Infinity);
+  } else {
+    m = m + Math.pow(2, mLen);
+    e = e - eBias;
+  }
+  return (s ? -1 : 1) * m * Math.pow(2, e - mLen);
+};
+
+exports.write = function(buffer, value, offset, isLE, mLen, nBytes) {
+  var e, m, c,
+      eLen = nBytes * 8 - mLen - 1,
+      eMax = (1 << eLen) - 1,
+      eBias = eMax >> 1,
+      rt = (mLen === 23 ? Math.pow(2, -24) - Math.pow(2, -77) : 0),
+      i = isLE ? 0 : (nBytes - 1),
+      d = isLE ? 1 : -1,
+      s = value < 0 || (value === 0 && 1 / value < 0) ? 1 : 0;
+
+  value = Math.abs(value);
+
+  if (isNaN(value) || value === Infinity) {
+    m = isNaN(value) ? 1 : 0;
+    e = eMax;
+  } else {
+    e = Math.floor(Math.log(value) / Math.LN2);
+    if (value * (c = Math.pow(2, -e)) < 1) {
+      e--;
+      c *= 2;
+    }
+    if (e + eBias >= 1) {
+      value += rt / c;
+    } else {
+      value += rt * Math.pow(2, 1 - eBias);
+    }
+    if (value * c >= 2) {
+      e++;
+      c /= 2;
+    }
+
+    if (e + eBias >= eMax) {
+      m = 0;
+      e = eMax;
+    } else if (e + eBias >= 1) {
+      m = (value * c - 1) * Math.pow(2, mLen);
+      e = e + eBias;
+    } else {
+      m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen);
+      e = 0;
+    }
+  }
+
+  for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8);
+
+  e = (e << mLen) | m;
+  eLen += mLen;
+  for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8);
+
+  buffer[offset + i - d] |= s * 128;
+};
+
+},{}],4:[function(_dereq_,module,exports){
+(function (process){
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+// resolves . and .. elements in a path array with directory names there
+// must be no slashes, empty elements, or device names (c:\) in the array
+// (so also no leading and trailing slashes - it does not distinguish
+// relative and absolute paths)
+function normalizeArray(parts, allowAboveRoot) {
+  // if the path tries to go above the root, `up` ends up > 0
+  var up = 0;
+  for (var i = parts.length - 1; i >= 0; i--) {
+    var last = parts[i];
+    if (last === '.') {
+      parts.splice(i, 1);
+    } else if (last === '..') {
+      parts.splice(i, 1);
+      up++;
+    } else if (up) {
+      parts.splice(i, 1);
+      up--;
+    }
+  }
+
+  // if the path is allowed to go above the root, restore leading ..s
+  if (allowAboveRoot) {
+    for (; up--; up) {
+      parts.unshift('..');
+    }
+  }
+
+  return parts;
+}
+
+// Split a filename into [root, dir, basename, ext], unix version
+// 'root' is just a slash, or nothing.
+var splitPathRe =
+    /^(\/?|)([\s\S]*?)((?:\.{1,2}|[^\/]+?|)(\.[^.\/]*|))(?:[\/]*)$/;
+var splitPath = function(filename) {
+  return splitPathRe.exec(filename).slice(1);
+};
+
+// path.resolve([from ...], to)
+// posix version
+exports.resolve = function() {
+  var resolvedPath = '',
+      resolvedAbsolute = false;
+
+  for (var i = arguments.length - 1; i >= -1 && !resolvedAbsolute; i--) {
+    var path = (i >= 0) ? arguments[i] : process.cwd();
+
+    // Skip empty and invalid entries
+    if (typeof path !== 'string') {
+      throw new TypeError('Arguments to path.resolve must be strings');
+    } else if (!path) {
+      continue;
+    }
+
+    resolvedPath = path + '/' + resolvedPath;
+    resolvedAbsolute = path.charAt(0) === '/';
+  }
+
+  // At this point the path should be resolved to a full absolute path, but
+  // handle relative paths to be safe (might happen when process.cwd() fails)
+
+  // Normalize the path
+  resolvedPath = normalizeArray(filter(resolvedPath.split('/'), function(p) {
+    return !!p;
+  }), !resolvedAbsolute).join('/');
+
+  return ((resolvedAbsolute ? '/' : '') + resolvedPath) || '.';
+};
+
+// path.normalize(path)
+// posix version
+exports.normalize = function(path) {
+  var isAbsolute = exports.isAbsolute(path),
+      trailingSlash = substr(path, -1) === '/';
+
+  // Normalize the path
+  path = normalizeArray(filter(path.split('/'), function(p) {
+    return !!p;
+  }), !isAbsolute).join('/');
+
+  if (!path && !isAbsolute) {
+    path = '.';
+  }
+  if (path && trailingSlash) {
+    path += '/';
+  }
+
+  return (isAbsolute ? '/' : '') + path;
+};
+
+// posix version
+exports.isAbsolute = function(path) {
+  return path.charAt(0) === '/';
+};
+
+// posix version
+exports.join = function() {
+  var paths = Array.prototype.slice.call(arguments, 0);
+  return exports.normalize(filter(paths, function(p, index) {
+    if (typeof p !== 'string') {
+      throw new TypeError('Arguments to path.join must be strings');
+    }
+    return p;
+  }).join('/'));
+};
+
+
+// path.relative(from, to)
+// posix version
+exports.relative = function(from, to) {
+  from = exports.resolve(from).substr(1);
+  to = exports.resolve(to).substr(1);
+
+  function trim(arr) {
+    var start = 0;
+    for (; start < arr.length; start++) {
+      if (arr[start] !== '') break;
+    }
+
+    var end = arr.length - 1;
+    for (; end >= 0; end--) {
+      if (arr[end] !== '') break;
+    }
+
+    if (start > end) return [];
+    return arr.slice(start, end - start + 1);
+  }
+
+  var fromParts = trim(from.split('/'));
+  var toParts = trim(to.split('/'));
+
+  var length = Math.min(fromParts.length, toParts.length);
+  var samePartsLength = length;
+  for (var i = 0; i < length; i++) {
+    if (fromParts[i] !== toParts[i]) {
+      samePartsLength = i;
+      break;
+    }
+  }
+
+  var outputParts = [];
+  for (var i = samePartsLength; i < fromParts.length; i++) {
+    outputParts.push('..');
+  }
+
+  outputParts = outputParts.concat(toParts.slice(samePartsLength));
+
+  return outputParts.join('/');
+};
+
+exports.sep = '/';
+exports.delimiter = ':';
+
+exports.dirname = function(path) {
+  var result = splitPath(path),
+      root = result[0],
+      dir = result[1];
+
+  if (!root && !dir) {
+    // No dirname whatsoever
+    return '.';
+  }
+
+  if (dir) {
+    // It has a dirname, strip trailing slash
+    dir = dir.substr(0, dir.length - 1);
+  }
+
+  return root + dir;
+};
+
+
+exports.basename = function(path, ext) {
+  var f = splitPath(path)[2];
+  // TODO: make this comparison case-insensitive on windows?
+  if (ext && f.substr(-1 * ext.length) === ext) {
+    f = f.substr(0, f.length - ext.length);
+  }
+  return f;
+};
+
+
+exports.extname = function(path) {
+  return splitPath(path)[3];
+};
+
+function filter (xs, f) {
+    if (xs.filter) return xs.filter(f);
+    var res = [];
+    for (var i = 0; i < xs.length; i++) {
+        if (f(xs[i], i, xs)) res.push(xs[i]);
+    }
+    return res;
+}
+
+// String.prototype.substr - negative index don't work in IE8
+var substr = 'ab'.substr(-1) === 'b'
+    ? function (str, start, len) { return str.substr(start, len) }
+    : function (str, start, len) {
+        if (start < 0) start = str.length + start;
+        return str.substr(start, len);
+    }
+;
+
+}).call(this,_dereq_("FWaASH"))
+},{"FWaASH":5}],5:[function(_dereq_,module,exports){
+// shim for using process in browser
+
+var process = module.exports = {};
+
+process.nextTick = (function () {
+    var canSetImmediate = typeof window !== 'undefined'
+    && window.setImmediate;
+    var canPost = typeof window !== 'undefined'
+    && window.postMessage && window.addEventListener
+    ;
+
+    if (canSetImmediate) {
+        return function (f) { return window.setImmediate(f) };
+    }
+
+    if (canPost) {
+        var queue = [];
+        window.addEventListener('message', function (ev) {
+            var source = ev.source;
+            if ((source === window || source === null) && ev.data === 'process-tick') {
+                ev.stopPropagation();
+                if (queue.length > 0) {
+                    var fn = queue.shift();
+                    fn();
+                }
+            }
+        }, true);
+
+        return function nextTick(fn) {
+            queue.push(fn);
+            window.postMessage('process-tick', '*');
+        };
+    }
+
+    return function nextTick(fn) {
+        setTimeout(fn, 0);
+    };
+})();
+
+process.title = 'browser';
+process.browser = true;
+process.env = {};
+process.argv = [];
+
+function noop() {}
+
+process.on = noop;
+process.addListener = noop;
+process.once = noop;
+process.off = noop;
+process.removeListener = noop;
+process.removeAllListeners = noop;
+process.emit = noop;
+
+process.binding = function (name) {
+    throw new Error('process.binding is not supported');
+}
+
+// TODO(shtylman)
+process.cwd = function () { return '/' };
+process.chdir = function (dir) {
+    throw new Error('process.chdir is not supported');
+};
+
+},{}],6:[function(_dereq_,module,exports){
+/*
+  Copyright (C) 2013 Ariya Hidayat <ariya.hidayat@gmail.com>
+  Copyright (C) 2013 Thaddee Tyl <thaddee.tyl@gmail.com>
+  Copyright (C) 2012 Ariya Hidayat <ariya.hidayat@gmail.com>
+  Copyright (C) 2012 Mathias Bynens <mathias@qiwi.be>
+  Copyright (C) 2012 Joost-Wim Boekesteijn <joost-wim@boekesteijn.nl>
+  Copyright (C) 2012 Kris Kowal <kris.kowal@cixar.com>
+  Copyright (C) 2012 Yusuke Suzuki <utatane.tea@gmail.com>
+  Copyright (C) 2012 Arpad Borsos <arpad.borsos@googlemail.com>
+  Copyright (C) 2011 Ariya Hidayat <ariya.hidayat@gmail.com>
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in the
+      documentation and/or other materials provided with the distribution.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+  ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
+  DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+/*jslint bitwise:true plusplus:true */
+/*global esprima:true, define:true, exports:true, window: true,
+throwError: true, generateStatement: true, peek: true,
+parseAssignmentExpression: true, parseBlock: true,
+parseClassExpression: true, parseClassDeclaration: true, parseExpression: true,
+parseForStatement: true,
+parseFunctionDeclaration: true, parseFunctionExpression: true,
+parseFunctionSourceElements: true, parseVariableIdentifier: true,
+parseImportSpecifier: true,
+parseLeftHandSideExpression: true, parseParams: true, validateParam: true,
+parseSpreadOrAssignmentExpression: true,
+parseStatement: true, parseSourceElement: true, parseModuleBlock: true, parseConciseBody: true,
+advanceXJSChild: true, isXJSIdentifierStart: true, isXJSIdentifierPart: true,
+scanXJSStringLiteral: true, scanXJSIdentifier: true,
+parseXJSAttributeValue: true, parseXJSChild: true, parseXJSElement: true, parseXJSExpressionContainer: true, parseXJSEmptyExpression: true,
+parseTypeAnnotation: true, parseTypeAnnotatableIdentifier: true,
+parseYieldExpression: true
+*/
+
+(function (root, factory) {
+    'use strict';
+
+    // Universal Module Definition (UMD) to support AMD, CommonJS/Node.js,
+    // Rhino, and plain browser loading.
+    if (typeof define === 'function' && define.amd) {
+        define(['exports'], factory);
+    } else if (typeof exports !== 'undefined') {
+        factory(exports);
+    } else {
+        factory((root.esprima = {}));
+    }
+}(this, function (exports) {
+    'use strict';
+
+    var Token,
+        TokenName,
+        FnExprTokens,
+        Syntax,
+        PropertyKind,
+        Messages,
+        Regex,
+        SyntaxTreeDelegate,
+        XHTMLEntities,
+        ClassPropertyType,
+        source,
+        strict,
+        index,
+        lineNumber,
+        lineStart,
+        length,
+        delegate,
+        lookahead,
+        state,
+        extra;
+
+    Token = {
+        BooleanLiteral: 1,
+        EOF: 2,
+        Identifier: 3,
+        Keyword: 4,
+        NullLiteral: 5,
+        NumericLiteral: 6,
+        Punctuator: 7,
+        StringLiteral: 8,
+        RegularExpression: 9,
+        Template: 10,
+        XJSIdentifier: 11,
+        XJSText: 12
+    };
+
+    TokenName = {};
+    TokenName[Token.BooleanLiteral] = 'Boolean';
+    TokenName[Token.EOF] = '<end>';
+    TokenName[Token.Identifier] = 'Identifier';
+    TokenName[Token.Keyword] = 'Keyword';
+    TokenName[Token.NullLiteral] = 'Null';
+    TokenName[Token.NumericLiteral] = 'Numeric';
+    TokenName[Token.Punctuator] = 'Punctuator';
+    TokenName[Token.StringLiteral] = 'String';
+    TokenName[Token.XJSIdentifier] = 'XJSIdentifier';
+    TokenName[Token.XJSText] = 'XJSText';
+    TokenName[Token.RegularExpression] = 'RegularExpression';
+
+    // A function following one of those tokens is an expression.
+    FnExprTokens = ['(', '{', '[', 'in', 'typeof', 'instanceof', 'new',
+                    'return', 'case', 'delete', 'throw', 'void',
+                    // assignment operators
+                    '=', '+=', '-=', '*=', '/=', '%=', '<<=', '>>=', '>>>=',
+                    '&=', '|=', '^=', ',',
+                    // binary/unary operators
+                    '+', '-', '*', '/', '%', '++', '--', '<<', '>>', '>>>', '&',
+                    '|', '^', '!', '~', '&&', '||', '?', ':', '===', '==', '>=',
+                    '<=', '<', '>', '!=', '!=='];
+
+    Syntax = {
+        ArrayExpression: 'ArrayExpression',
+        ArrayPattern: 'ArrayPattern',
+        ArrowFunctionExpression: 'ArrowFunctionExpression',
+        AssignmentExpression: 'AssignmentExpression',
+        BinaryExpression: 'BinaryExpression',
+        BlockStatement: 'BlockStatement',
+        BreakStatement: 'BreakStatement',
+        CallExpression: 'CallExpression',
+        CatchClause: 'CatchClause',
+        ClassBody: 'ClassBody',
+        ClassDeclaration: 'ClassDeclaration',
+        ClassExpression: 'ClassExpression',
+        ClassProperty: 'ClassProperty',
+        ComprehensionBlock: 'ComprehensionBlock',
+        ComprehensionExpression: 'ComprehensionExpression',
+        ConditionalExpression: 'ConditionalExpression',
+        ContinueStatement: 'ContinueStatement',
+        DebuggerStatement: 'DebuggerStatement',
+        DoWhileStatement: 'DoWhileStatement',
+        EmptyStatement: 'EmptyStatement',
+        ExportDeclaration: 'ExportDeclaration',
+        ExportBatchSpecifier: 'ExportBatchSpecifier',
+        ExportSpecifier: 'ExportSpecifier',
+        ExpressionStatement: 'ExpressionStatement',
+        ForInStatement: 'ForInStatement',
+        ForOfStatement: 'ForOfStatement',
+        ForStatement: 'ForStatement',
+        FunctionDeclaration: 'FunctionDeclaration',
+        FunctionExpression: 'FunctionExpression',
+        Identifier: 'Identifier',
+        IfStatement: 'IfStatement',
+        ImportDeclaration: 'ImportDeclaration',
+        ImportSpecifier: 'ImportSpecifier',
+        LabeledStatement: 'LabeledStatement',
+        Literal: 'Literal',
+        LogicalExpression: 'LogicalExpression',
+        MemberExpression: 'MemberExpression',
+        MethodDefinition: 'MethodDefinition',
+        ModuleDeclaration: 'ModuleDeclaration',
+        NewExpression: 'NewExpression',
+        ObjectExpression: 'ObjectExpression',
+        ObjectPattern: 'ObjectPattern',
+        ObjectTypeAnnotation: 'ObjectTypeAnnotation',
+        OptionalParameter: 'OptionalParameter',
+        ParametricTypeAnnotation: 'ParametricTypeAnnotation',
+        ParametricallyTypedIdentifier: 'ParametricallyTypedIdentifier',
+        Program: 'Program',
+        Property: 'Property',
+        ReturnStatement: 'ReturnStatement',
+        SequenceExpression: 'SequenceExpression',
+        SpreadElement: 'SpreadElement',
+        SpreadProperty: 'SpreadProperty',
+        SwitchCase: 'SwitchCase',
+        SwitchStatement: 'SwitchStatement',
+        TaggedTemplateExpression: 'TaggedTemplateExpression',
+        TemplateElement: 'TemplateElement',
+        TemplateLiteral: 'TemplateLiteral',
+        ThisExpression: 'ThisExpression',
+        ThrowStatement: 'ThrowStatement',
+        TryStatement: 'TryStatement',
+        TypeAnnotatedIdentifier: 'TypeAnnotatedIdentifier',
+        TypeAnnotation: 'TypeAnnotation',
+        UnaryExpression: 'UnaryExpression',
+        UpdateExpression: 'UpdateExpression',
+        VariableDeclaration: 'VariableDeclaration',
+        VariableDeclarator: 'VariableDeclarator',
+        VoidTypeAnnotation: 'VoidTypeAnnotation',
+        WhileStatement: 'WhileStatement',
+        WithStatement: 'WithStatement',
+        XJSIdentifier: 'XJSIdentifier',
+        XJSNamespacedName: 'XJSNamespacedName',
+        XJSMemberExpression: 'XJSMemberExpression',
+        XJSEmptyExpression: 'XJSEmptyExpression',
+        XJSExpressionContainer: 'XJSExpressionContainer',
+        XJSElement: 'XJSElement',
+        XJSClosingElement: 'XJSClosingElement',
+        XJSOpeningElement: 'XJSOpeningElement',
+        XJSAttribute: 'XJSAttribute',
+        XJSSpreadAttribute: 'XJSSpreadAttribute',
+        XJSText: 'XJSText',
+        YieldExpression: 'YieldExpression'
+    };
+
+    PropertyKind = {
+        Data: 1,
+        Get: 2,
+        Set: 4
+    };
+
+    ClassPropertyType = {
+        'static': 'static',
+        prototype: 'prototype'
+    };
+
+    // Error messages should be identical to V8.
+    Messages = {
+        UnexpectedToken:  'Unexpected token %0',
+        UnexpectedNumber:  'Unexpected number',
+        UnexpectedString:  'Unexpected string',
+        UnexpectedIdentifier:  'Unexpected identifier',
+        UnexpectedReserved:  'Unexpected reserved word',
+        UnexpectedTemplate:  'Unexpected quasi %0',
+        UnexpectedEOS:  'Unexpected end of input',
+        NewlineAfterThrow:  'Illegal newline after throw',
+        InvalidRegExp: 'Invalid regular expression',
+        UnterminatedRegExp:  'Invalid regular expression: missing /',
+        InvalidLHSInAssignment:  'Invalid left-hand side in assignment',
+        InvalidLHSInFormalsList:  'Invalid left-hand side in formals list',
+        InvalidLHSInForIn:  'Invalid left-hand side in for-in',
+        MultipleDefaultsInSwitch: 'More than one default clause in switch statement',
+        NoCatchOrFinally:  'Missing catch or finally after try',
+        UnknownLabel: 'Undefined label \'%0\'',
+        Redeclaration: '%0 \'%1\' has already been declared',
+        IllegalContinue: 'Illegal continue statement',
+        IllegalBreak: 'Illegal break statement',
+        IllegalDuplicateClassProperty: 'Illegal duplicate property in class definition',
+        IllegalReturn: 'Illegal return statement',
+        IllegalYield: 'Illegal yield expression',
+        IllegalSpread: 'Illegal spread element',
+        StrictModeWith:  'Strict mode code may not include a with statement',
+        StrictCatchVariable:  'Catch variable may not be eval or arguments in strict mode',
+        StrictVarName:  'Variable name may not be eval or arguments in strict mode',
+        StrictParamName:  'Parameter name eval or arguments is not allowed in strict mode',
+        StrictParamDupe: 'Strict mode function may not have duplicate parameter names',
+        ParameterAfterRestParameter: 'Rest parameter must be final parameter of an argument list',
+        DefaultRestParameter: 'Rest parameter can not have a default value',
+        ElementAfterSpreadElement: 'Spread must be the final element of an element list',
+        PropertyAfterSpreadProperty: 'A rest property must be the final property of an object literal',
+        ObjectPatternAsRestParameter: 'Invalid rest parameter',
+        ObjectPatternAsSpread: 'Invalid spread argument',
+        StrictFunctionName:  'Function name may not be eval or arguments in strict mode',
+        StrictOctalLiteral:  'Octal literals are not allowed in strict mode.',
+        StrictDelete:  'Delete of an unqualified identifier in strict mode.',
+        StrictDuplicateProperty:  'Duplicate data property in object literal not allowed in strict mode',
+        AccessorDataProperty:  'Object literal may not have data and accessor property with the same name',
+        AccessorGetSet:  'Object literal may not have multiple get/set accessors with the same name',
+        StrictLHSAssignment:  'Assignment to eval or arguments is not allowed in strict mode',
+        StrictLHSPostfix:  'Postfix increment/decrement may not have eval or arguments operand in strict mode',
+        StrictLHSPrefix:  'Prefix increment/decrement may not have eval or arguments operand in strict mode',
+        StrictReservedWord:  'Use of future reserved word in strict mode',
+        NewlineAfterModule:  'Illegal newline after module',
+        NoFromAfterImport: 'Missing from after import',
+        InvalidModuleSpecifier: 'Invalid module specifier',
+        NestedModule: 'Module declaration can not be nested',
+        NoUnintializedConst: 'Const must be initialized',
+        ComprehensionRequiresBlock: 'Comprehension must have at least one block',
+        ComprehensionError:  'Comprehension Error',
+        EachNotAllowed:  'Each is not supported',
+        InvalidXJSAttributeValue: 'XJS value should be either an expression or a quoted XJS text',
+        ExpectedXJSClosingTag: 'Expected corresponding XJS closing tag for %0',
+        AdjacentXJSElements: 'Adjacent XJS elements must be wrapped in an enclosing tag'
+    };
+
+    // See also tools/generate-unicode-regex.py.
+    Regex = {
+        NonAsciiIdentifierStart: new RegExp('[\xaa\xb5\xba\xc0-\xd6\xd8-\xf6\xf8-\u02c1\u02c6-\u02d1\u02e0-\u02e4\u02ec\u02ee\u0370-\u0374\u0376\u0377\u037a-\u037d\u0386\u0388-\u038a\u038c\u038e-\u03a1\u03a3-\u03f5\u03f7-\u0481\u048a-\u0527\u0531-\u0556\u0559\u0561-\u0587\u05d0-\u05ea\u05f0-\u05f2\u0620-\u064a\u066e\u066f\u0671-\u06d3\u06d5\u06e5\u06e6\u06ee\u06ef\u06fa-\u06fc\u06ff\u0710\u0712-\u072f\u074d-\u07a5\u07b1\u07ca-\u07ea\u07f4\u07f5\u07fa\u0800-\u0815\u081a\u0824\u0828\u0840-\u0858\u08a0\u08a2-\u08ac\u0904-\u0939\u093d\u0950\u0958-\u0961\u0971-\u0977\u0979-\u097f\u0985-\u098c\u098f\u0990\u0993-\u09a8\u09aa-\u09b0\u09b2\u09b6-\u09b9\u09bd\u09ce\u09dc\u09dd\u09df-\u09e1\u09f0\u09f1\u0a05-\u0a0a\u0a0f\u0a10\u0a13-\u0a28\u0a2a-\u0a30\u0a32\u0a33\u0a35\u0a36\u0a38\u0a39\u0a59-\u0a5c\u0a5e\u0a72-\u0a74\u0a85-\u0a8d\u0a8f-\u0a91\u0a93-\u0aa8\u0aaa-\u0ab0\u0ab2\u0ab3\u0ab5-\u0ab9\u0abd\u0ad0\u0ae0\u0ae1\u0b05-\u0b0c\u0b0f\u0b10\u0b13-\u0b28\u0b2a-\u0b30\u0b32\u0b33\u0b35-\u0b39\u0b3d\u0b5c\u0b5d\u0b5f-\u0b61\u0b71\u0b83\u0b85-\u0b8a\u0b8e-\u0b90\u0b92-\u0b95\u0b99\u0b9a\u0b9c\u0b9e\u0b9f\u0ba3\u0ba4\u0ba8-\u0baa\u0bae-\u0bb9\u0bd0\u0c05-\u0c0c\u0c0e-\u0c10\u0c12-\u0c28\u0c2a-\u0c33\u0c35-\u0c39\u0c3d\u0c58\u0c59\u0c60\u0c61\u0c85-\u0c8c\u0c8e-\u0c90\u0c92-\u0ca8\u0caa-\u0cb3\u0cb5-\u0cb9\u0cbd\u0cde\u0ce0\u0ce1\u0cf1\u0cf2\u0d05-\u0d0c\u0d0e-\u0d10\u0d12-\u0d3a\u0d3d\u0d4e\u0d60\u0d61\u0d7a-\u0d7f\u0d85-\u0d96\u0d9a-\u0db1\u0db3-\u0dbb\u0dbd\u0dc0-\u0dc6\u0e01-\u0e30\u0e32\u0e33\u0e40-\u0e46\u0e81\u0e82\u0e84\u0e87\u0e88\u0e8a\u0e8d\u0e94-\u0e97\u0e99-\u0e9f\u0ea1-\u0ea3\u0ea5\u0ea7\u0eaa\u0eab\u0ead-\u0eb0\u0eb2\u0eb3\u0ebd\u0ec0-\u0ec4\u0ec6\u0edc-\u0edf\u0f00\u0f40-\u0f47\u0f49-\u0f6c\u0f88-\u0f8c\u1000-\u102a\u103f\u1050-\u1055\u105a-\u105d\u1061\u1065\u1066\u106e-\u1070\u1075-\u1081\u108e\u10a0-\u10c5\u10c7\u10cd\u10d0-\u10fa\u10fc-\u1248\u124a-\u124d\u1250-\u1256\u1258\u125a-\u125d\u1260-\u1288\u128a-\u128d\u1290-\u12b0\u12b2-\u12b5\u12b8-\u12be\u12c0\u12c2-\u12c5\u12c8-\u12d6\u12d8-\u1310\u1312-\u1315\u1318-\u135a\u1380-\u138f\u13a0-\u13f4\u1401-\u166c\u166f-\u167f\u1681-\u169a\u16a0-\u16ea\u16ee-\u16f0\u1700-\u170c\u170e-\u1711\u1720-\u1731\u1740-\u1751\u1760-\u176c\u176e-\u1770\u1780-\u17b3\u17d7\u17dc\u1820-\u1877\u1880-\u18a8\u18aa\u18b0-\u18f5\u1900-\u191c\u1950-\u196d\u1970-\u1974\u1980-\u19ab\u19c1-\u19c7\u1a00-\u1a16\u1a20-\u1a54\u1aa7\u1b05-\u1b33\u1b45-\u1b4b\u1b83-\u1ba0\u1bae\u1baf\u1bba-\u1be5\u1c00-\u1c23\u1c4d-\u1c4f\u1c5a-\u1c7d\u1ce9-\u1cec\u1cee-\u1cf1\u1cf5\u1cf6\u1d00-\u1dbf\u1e00-\u1f15\u1f18-\u1f1d\u1f20-\u1f45\u1f48-\u1f4d\u1f50-\u1f57\u1f59\u1f5b\u1f5d\u1f5f-\u1f7d\u1f80-\u1fb4\u1fb6-\u1fbc\u1fbe\u1fc2-\u1fc4\u1fc6-\u1fcc\u1fd0-\u1fd3\u1fd6-\u1fdb\u1fe0-\u1fec\u1ff2-\u1ff4\u1ff6-\u1ffc\u2071\u207f\u2090-\u209c\u2102\u2107\u210a-\u2113\u2115\u2119-\u211d\u2124\u2126\u2128\u212a-\u212d\u212f-\u2139\u213c-\u213f\u2145-\u2149\u214e\u2160-\u2188\u2c00-\u2c2e\u2c30-\u2c5e\u2c60-\u2ce4\u2ceb-\u2cee\u2cf2\u2cf3\u2d00-\u2d25\u2d27\u2d2d\u2d30-\u2d67\u2d6f\u2d80-\u2d96\u2da0-\u2da6\u2da8-\u2dae\u2db0-\u2db6\u2db8-\u2dbe\u2dc0-\u2dc6\u2dc8-\u2dce\u2dd0-\u2dd6\u2dd8-\u2dde\u2e2f\u3005-\u3007\u3021-\u3029\u3031-\u3035\u3038-\u303c\u3041-\u3096\u309d-\u309f\u30a1-\u30fa\u30fc-\u30ff\u3105-\u312d\u3131-\u318e\u31a0-\u31ba\u31f0-\u31ff\u3400-\u4db5\u4e00-\u9fcc\ua000-\ua48c\ua4d0-\ua4fd\ua500-\ua60c\ua610-\ua61f\ua62a\ua62b\ua640-\ua66e\ua67f-\ua697\ua6a0-\ua6ef\ua717-\ua71f\ua722-\ua788\ua78b-\ua78e\ua790-\ua793\ua7a0-\ua7aa\ua7f8-\ua801\ua803-\ua805\ua807-\ua80a\ua80c-\ua822\ua840-\ua873\ua882-\ua8b3\ua8f2-\ua8f7\ua8fb\ua90a-\ua925\ua930-\ua946\ua960-\ua97c\ua984-\ua9b2\ua9cf\uaa00-\uaa28\uaa40-\uaa42\uaa44-\uaa4b\uaa60-\uaa76\uaa7a\uaa80-\uaaaf\uaab1\uaab5\uaab6\uaab9-\uaabd\uaac0\uaac2\uaadb-\uaadd\uaae0-\uaaea\uaaf2-\uaaf4\uab01-\uab06\uab09-\uab0e\uab11-\uab16\uab20-\uab26\uab28-\uab2e\uabc0-\uabe2\uac00-\ud7a3\ud7b0-\ud7c6\ud7cb-\ud7fb\uf900-\ufa6d\ufa70-\ufad9\ufb00-\ufb06\ufb13-\ufb17\ufb1d\ufb1f-\ufb28\ufb2a-\ufb36\ufb38-\ufb3c\ufb3e\ufb40\ufb41\ufb43\ufb44\ufb46-\ufbb1\ufbd3-\ufd3d\ufd50-\ufd8f\ufd92-\ufdc7\ufdf0-\ufdfb\ufe70-\ufe74\ufe76-\ufefc\uff21-\uff3a\uff41-\uff5a\uff66-\uffbe\uffc2-\uffc7\uffca-\uffcf\uffd2-\uffd7\uffda-\uffdc]'),
+        NonAsciiIdentifierPart: new RegExp('[\xaa\xb5\xba\xc0-\xd6\xd8-\xf6\xf8-\u02c1\u02c6-\u02d1\u02e0-\u02e4\u02ec\u02ee\u0300-\u0374\u0376\u0377\u037a-\u037d\u0386\u0388-\u038a\u038c\u038e-\u03a1\u03a3-\u03f5\u03f7-\u0481\u0483-\u0487\u048a-\u0527\u0531-\u0556\u0559\u0561-\u0587\u0591-\u05bd\u05bf\u05c1\u05c2\u05c4\u05c5\u05c7\u05d0-\u05ea\u05f0-\u05f2\u0610-\u061a\u0620-\u0669\u066e-\u06d3\u06d5-\u06dc\u06df-\u06e8\u06ea-\u06fc\u06ff\u0710-\u074a\u074d-\u07b1\u07c0-\u07f5\u07fa\u0800-\u082d\u0840-\u085b\u08a0\u08a2-\u08ac\u08e4-\u08fe\u0900-\u0963\u0966-\u096f\u0971-\u0977\u0979-\u097f\u0981-\u0983\u0985-\u098c\u098f\u0990\u0993-\u09a8\u09aa-\u09b0\u09b2\u09b6-\u09b9\u09bc-\u09c4\u09c7\u09c8\u09cb-\u09ce\u09d7\u09dc\u09dd\u09df-\u09e3\u09e6-\u09f1\u0a01-\u0a03\u0a05-\u0a0a\u0a0f\u0a10\u0a13-\u0a28\u0a2a-\u0a30\u0a32\u0a33\u0a35\u0a36\u0a38\u0a39\u0a3c\u0a3e-\u0a42\u0a47\u0a48\u0a4b-\u0a4d\u0a51\u0a59-\u0a5c\u0a5e\u0a66-\u0a75\u0a81-\u0a83\u0a85-\u0a8d\u0a8f-\u0a91\u0a93-\u0aa8\u0aaa-\u0ab0\u0ab2\u0ab3\u0ab5-\u0ab9\u0abc-\u0ac5\u0ac7-\u0ac9\u0acb-\u0acd\u0ad0\u0ae0-\u0ae3\u0ae6-\u0aef\u0b01-\u0b03\u0b05-\u0b0c\u0b0f\u0b10\u0b13-\u0b28\u0b2a-\u0b30\u0b32\u0b33\u0b35-\u0b39\u0b3c-\u0b44\u0b47\u0b48\u0b4b-\u0b4d\u0b56\u0b57\u0b5c\u0b5d\u0b5f-\u0b63\u0b66-\u0b6f\u0b71\u0b82\u0b83\u0b85-\u0b8a\u0b8e-\u0b90\u0b92-\u0b95\u0b99\u0b9a\u0b9c\u0b9e\u0b9f\u0ba3\u0ba4\u0ba8-\u0baa\u0bae-\u0bb9\u0bbe-\u0bc2\u0bc6-\u0bc8\u0bca-\u0bcd\u0bd0\u0bd7\u0be6-\u0bef\u0c01-\u0c03\u0c05-\u0c0c\u0c0e-\u0c10\u0c12-\u0c28\u0c2a-\u0c33\u0c35-\u0c39\u0c3d-\u0c44\u0c46-\u0c48\u0c4a-\u0c4d\u0c55\u0c56\u0c58\u0c59\u0c60-\u0c63\u0c66-\u0c6f\u0c82\u0c83\u0c85-\u0c8c\u0c8e-\u0c90\u0c92-\u0ca8\u0caa-\u0cb3\u0cb5-\u0cb9\u0cbc-\u0cc4\u0cc6-\u0cc8\u0cca-\u0ccd\u0cd5\u0cd6\u0cde\u0ce0-\u0ce3\u0ce6-\u0cef\u0cf1\u0cf2\u0d02\u0d03\u0d05-\u0d0c\u0d0e-\u0d10\u0d12-\u0d3a\u0d3d-\u0d44\u0d46-\u0d48\u0d4a-\u0d4e\u0d57\u0d60-\u0d63\u0d66-\u0d6f\u0d7a-\u0d7f\u0d82\u0d83\u0d85-\u0d96\u0d9a-\u0db1\u0db3-\u0dbb\u0dbd\u0dc0-\u0dc6\u0dca\u0dcf-\u0dd4\u0dd6\u0dd8-\u0ddf\u0df2\u0df3\u0e01-\u0e3a\u0e40-\u0e4e\u0e50-\u0e59\u0e81\u0e82\u0e84\u0e87\u0e88\u0e8a\u0e8d\u0e94-\u0e97\u0e99-\u0e9f\u0ea1-\u0ea3\u0ea5\u0ea7\u0eaa\u0eab\u0ead-\u0eb9\u0ebb-\u0ebd\u0ec0-\u0ec4\u0ec6\u0ec8-\u0ecd\u0ed0-\u0ed9\u0edc-\u0edf\u0f00\u0f18\u0f19\u0f20-\u0f29\u0f35\u0f37\u0f39\u0f3e-\u0f47\u0f49-\u0f6c\u0f71-\u0f84\u0f86-\u0f97\u0f99-\u0fbc\u0fc6\u1000-\u1049\u1050-\u109d\u10a0-\u10c5\u10c7\u10cd\u10d0-\u10fa\u10fc-\u1248\u124a-\u124d\u1250-\u1256\u1258\u125a-\u125d\u1260-\u1288\u128a-\u128d\u1290-\u12b0\u12b2-\u12b5\u12b8-\u12be\u12c0\u12c2-\u12c5\u12c8-\u12d6\u12d8-\u1310\u1312-\u1315\u1318-\u135a\u135d-\u135f\u1380-\u138f\u13a0-\u13f4\u1401-\u166c\u166f-\u167f\u1681-\u169a\u16a0-\u16ea\u16ee-\u16f0\u1700-\u170c\u170e-\u1714\u1720-\u1734\u1740-\u1753\u1760-\u176c\u176e-\u1770\u1772\u1773\u1780-\u17d3\u17d7\u17dc\u17dd\u17e0-\u17e9\u180b-\u180d\u1810-\u1819\u1820-\u1877\u1880-\u18aa\u18b0-\u18f5\u1900-\u191c\u1920-\u192b\u1930-\u193b\u1946-\u196d\u1970-\u1974\u1980-\u19ab\u19b0-\u19c9\u19d0-\u19d9\u1a00-\u1a1b\u1a20-\u1a5e\u1a60-\u1a7c\u1a7f-\u1a89\u1a90-\u1a99\u1aa7\u1b00-\u1b4b\u1b50-\u1b59\u1b6b-\u1b73\u1b80-\u1bf3\u1c00-\u1c37\u1c40-\u1c49\u1c4d-\u1c7d\u1cd0-\u1cd2\u1cd4-\u1cf6\u1d00-\u1de6\u1dfc-\u1f15\u1f18-\u1f1d\u1f20-\u1f45\u1f48-\u1f4d\u1f50-\u1f57\u1f59\u1f5b\u1f5d\u1f5f-\u1f7d\u1f80-\u1fb4\u1fb6-\u1fbc\u1fbe\u1fc2-\u1fc4\u1fc6-\u1fcc\u1fd0-\u1fd3\u1fd6-\u1fdb\u1fe0-\u1fec\u1ff2-\u1ff4\u1ff6-\u1ffc\u200c\u200d\u203f\u2040\u2054\u2071\u207f\u2090-\u209c\u20d0-\u20dc\u20e1\u20e5-\u20f0\u2102\u2107\u210a-\u2113\u2115\u2119-\u211d\u2124\u2126\u2128\u212a-\u212d\u212f-\u2139\u213c-\u213f\u2145-\u2149\u214e\u2160-\u2188\u2c00-\u2c2e\u2c30-\u2c5e\u2c60-\u2ce4\u2ceb-\u2cf3\u2d00-\u2d25\u2d27\u2d2d\u2d30-\u2d67\u2d6f\u2d7f-\u2d96\u2da0-\u2da6\u2da8-\u2dae\u2db0-\u2db6\u2db8-\u2dbe\u2dc0-\u2dc6\u2dc8-\u2dce\u2dd0-\u2dd6\u2dd8-\u2dde\u2de0-\u2dff\u2e2f\u3005-\u3007\u3021-\u302f\u3031-\u3035\u3038-\u303c\u3041-\u3096\u3099\u309a\u309d-\u309f\u30a1-\u30fa\u30fc-\u30ff\u3105-\u312d\u3131-\u318e\u31a0-\u31ba\u31f0-\u31ff\u3400-\u4db5\u4e00-\u9fcc\ua000-\ua48c\ua4d0-\ua4fd\ua500-\ua60c\ua610-\ua62b\ua640-\ua66f\ua674-\ua67d\ua67f-\ua697\ua69f-\ua6f1\ua717-\ua71f\ua722-\ua788\ua78b-\ua78e\ua790-\ua793\ua7a0-\ua7aa\ua7f8-\ua827\ua840-\ua873\ua880-\ua8c4\ua8d0-\ua8d9\ua8e0-\ua8f7\ua8fb\ua900-\ua92d\ua930-\ua953\ua960-\ua97c\ua980-\ua9c0\ua9cf-\ua9d9\uaa00-\uaa36\uaa40-\uaa4d\uaa50-\uaa59\uaa60-\uaa76\uaa7a\uaa7b\uaa80-\uaac2\uaadb-\uaadd\uaae0-\uaaef\uaaf2-\uaaf6\uab01-\uab06\uab09-\uab0e\uab11-\uab16\uab20-\uab26\uab28-\uab2e\uabc0-\uabea\uabec\uabed\uabf0-\uabf9\uac00-\ud7a3\ud7b0-\ud7c6\ud7cb-\ud7fb\uf900-\ufa6d\ufa70-\ufad9\ufb00-\ufb06\ufb13-\ufb17\ufb1d-\ufb28\ufb2a-\ufb36\ufb38-\ufb3c\ufb3e\ufb40\ufb41\ufb43\ufb44\ufb46-\ufbb1\ufbd3-\ufd3d\ufd50-\ufd8f\ufd92-\ufdc7\ufdf0-\ufdfb\ufe00-\ufe0f\ufe20-\ufe26\ufe33\ufe34\ufe4d-\ufe4f\ufe70-\ufe74\ufe76-\ufefc\uff10-\uff19\uff21-\uff3a\uff3f\uff41-\uff5a\uff66-\uffbe\uffc2-\uffc7\uffca-\uffcf\uffd2-\uffd7\uffda-\uffdc]')
+    };
+
+    // Ensure the condition is true, otherwise throw an error.
+    // This is only to have a better contract semantic, i.e. another safety net
+    // to catch a logic error. The condition shall be fulfilled in normal case.
+    // Do NOT use this to enforce a certain condition on any user input.
+
+    function assert(condition, message) {
+        if (!condition) {
+            throw new Error('ASSERT: ' + message);
+        }
+    }
+
+    function isDecimalDigit(ch) {
+        return (ch >= 48 && ch <= 57);   // 0..9
+    }
+
+    function isHexDigit(ch) {
+        return '0123456789abcdefABCDEF'.indexOf(ch) >= 0;
+    }
+
+    function isOctalDigit(ch) {
+        return '01234567'.indexOf(ch) >= 0;
+    }
+
+
+    // 7.2 White Space
+
+    function isWhiteSpace(ch) {
+        return (ch === 32) ||  // space
+            (ch === 9) ||      // tab
+            (ch === 0xB) ||
+            (ch === 0xC) ||
+            (ch === 0xA0) ||
+            (ch >= 0x1680 && '\u1680\u180E\u2000\u2001\u2002\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200A\u202F\u205F\u3000\uFEFF'.indexOf(String.fromCharCode(ch)) > 0);
+    }
+
+    // 7.3 Line Terminators
+
+    function isLineTerminator(ch) {
+        return (ch === 10) || (ch === 13) || (ch === 0x2028) || (ch === 0x2029);
+    }
+
+    // 7.6 Identifier Names and Identifiers
+
+    function isIdentifierStart(ch) {
+        return (ch === 36) || (ch === 95) ||  // $ (dollar) and _ (underscore)
+            (ch >= 65 && ch <= 90) ||         // A..Z
+            (ch >= 97 && ch <= 122) ||        // a..z
+            (ch === 92) ||                    // \ (backslash)
+            ((ch >= 0x80) && Regex.NonAsciiIdentifierStart.test(String.fromCharCode(ch)));
+    }
+
+    function isIdentifierPart(ch) {
+        return (ch === 36) || (ch === 95) ||  // $ (dollar) and _ (underscore)
+            (ch >= 65 && ch <= 90) ||         // A..Z
+            (ch >= 97 && ch <= 122) ||        // a..z
+            (ch >= 48 && ch <= 57) ||         // 0..9
+            (ch === 92) ||                    // \ (backslash)
+            ((ch >= 0x80) && Regex.NonAsciiIdentifierPart.test(String.fromCharCode(ch)));
+    }
+
+    // 7.6.1.2 Future Reserved Words
+
+    function isFutureReservedWord(id) {
+        switch (id) {
+        case 'class':
+        case 'enum':
+        case 'export':
+        case 'extends':
+        case 'import':
+        case 'super':
+            return true;
+        default:
+            return false;
+        }
+    }
+
+    function isStrictModeReservedWord(id) {
+        switch (id) {
+        case 'implements':
+        case 'interface':
+        case 'package':
+        case 'private':
+        case 'protected':
+        case 'public':
+        case 'static':
+        case 'yield':
+        case 'let':
+            return true;
+        default:
+            return false;
+        }
+    }
+
+    function isRestrictedWord(id) {
+        return id === 'eval' || id === 'arguments';
+    }
+
+    // 7.6.1.1 Keywords
+
+    function isKeyword(id) {
+        if (strict && isStrictModeReservedWord(id)) {
+            return true;
+        }
+
+        // 'const' is specialized as Keyword in V8.
+        // 'yield' is only treated as a keyword in strict mode.
+        // 'let' is for compatiblity with SpiderMonkey and ES.next.
+        // Some others are from future reserved words.
+
+        switch (id.length) {
+        case 2:
+            return (id === 'if') || (id === 'in') || (id === 'do');
+        case 3:
+            return (id === 'var') || (id === 'for') || (id === 'new') ||
+                (id === 'try') || (id === 'let');
+        case 4:
+            return (id === 'this') || (id === 'else') || (id === 'case') ||
+                (id === 'void') || (id === 'with') || (id === 'enum');
+        case 5:
+            return (id === 'while') || (id === 'break') || (id === 'catch') ||
+                (id === 'throw') || (id === 'const') ||
+                (id === 'class') || (id === 'super');
+        case 6:
+            return (id === 'return') || (id === 'typeof') || (id === 'delete') ||
+                (id === 'switch') || (id === 'export') || (id === 'import');
+        case 7:
+            return (id === 'default') || (id === 'finally') || (id === 'extends');
+        case 8:
+            return (id === 'function') || (id === 'continue') || (id === 'debugger');
+        case 10:
+            return (id === 'instanceof');
+        default:
+            return false;
+        }
+    }
+
+    // 7.4 Comments
+
+    function skipComment() {
+        var ch, blockComment, lineComment;
+
+        blockComment = false;
+        lineComment = false;
+
+        while (index < length) {
+            ch = source.charCodeAt(index);
+
+            if (lineComment) {
+                ++index;
+                if (isLineTerminator(ch)) {
+                    lineComment = false;
+                    if (ch === 13 && source.charCodeAt(index) === 10) {
+                        ++index;
+                    }
+                    ++lineNumber;
+                    lineStart = index;
+                }
+            } else if (blockComment) {
+                if (isLineTerminator(ch)) {
+                    if (ch === 13 && source.charCodeAt(index + 1) === 10) {
+                        ++index;
+                    }
+                    ++lineNumber;
+                    ++index;
+                    lineStart = index;
+                    if (index >= length) {
+                        throwError({}, Messages.UnexpectedToken, 'ILLEGAL');
+                    }
+                } else {
+                    ch = source.charCodeAt(index++);
+                    if (index >= length) {
+                        throwError({}, Messages.UnexpectedToken, 'ILLEGAL');
+                    }
+                    // Block comment ends with '*/' (char #42, char #47).
+                    if (ch === 42) {
+                        ch = source.charCodeAt(index);
+                        if (ch === 47) {
+                            ++index;
+                            blockComment = false;
+                        }
+                    }
+                }
+            } else if (ch === 47) {
+                ch = source.charCodeAt(index + 1);
+                // Line comment starts with '//' (char #47, char #47).
+                if (ch === 47) {
+                    index += 2;
+                    lineComment = true;
+                } else if (ch === 42) {
+                    // Block comment starts with '/*' (char #47, char #42).
+                    index += 2;
+                    blockComment = true;
+                    if (index >= length) {
+                        throwError({}, Messages.UnexpectedToken, 'ILLEGAL');
+                    }
+                } else {
+                    break;
+                }
+            } else if (isWhiteSpace(ch)) {
+                ++index;
+            } else if (isLineTerminator(ch)) {
+                ++index;
+                if (ch === 13 && source.charCodeAt(index) === 10) {
+                    ++index;
+                }
+                ++lineNumber;
+                lineStart = index;
+            } else {
+                break;
+            }
+        }
+    }
+
+    function scanHexEscape(prefix) {
+        var i, len, ch, code = 0;
+
+        len = (prefix === 'u') ? 4 : 2;
+        for (i = 0; i < len; ++i) {
+            if (index < length && isHexDigit(source[index])) {
+                ch = source[index++];
+                code = code * 16 + '0123456789abcdef'.indexOf(ch.toLowerCase());
+            } else {
+                return '';
+            }
+        }
+        return String.fromCharCode(code);
+    }
+
+    function scanUnicodeCodePointEscape() {
+        var ch, code, cu1, cu2;
+
+        ch = source[index];
+        code = 0;
+
+        // At least, one hex digit is required.
+        if (ch === '}') {
+            throwError({}, Messages.UnexpectedToken, 'ILLEGAL');
+        }
+
+        while (index < length) {
+            ch = source[index++];
+            if (!isHexDigit(ch)) {
+                break;
+            }
+            code = code * 16 + '0123456789abcdef'.indexOf(ch.toLowerCase());
+        }
+
+        if (code > 0x10FFFF || ch !== '}') {
+            throwError({}, Messages.UnexpectedToken, 'ILLEGAL');
+        }
+
+        // UTF-16 Encoding
+        if (code <= 0xFFFF) {
+            return String.fromCharCode(code);
+        }
+        cu1 = ((code - 0x10000) >> 10) + 0xD800;
+        cu2 = ((code - 0x10000) & 1023) + 0xDC00;
+        return String.fromCharCode(cu1, cu2);
+    }
+
+    function getEscapedIdentifier() {
+        var ch, id;
+
+        ch = source.charCodeAt(index++);
+        id = String.fromCharCode(ch);
+
+        // '\u' (char #92, char #117) denotes an escaped character.
+        if (ch === 92) {
+            if (source.charCodeAt(index) !== 117) {
+                throwError({}, Messages.UnexpectedToken, 'ILLEGAL');
+            }
+            ++index;
+            ch = scanHexEscape('u');
+            if (!ch || ch === '\\' || !isIdentifierStart(ch.charCodeAt(0))) {
+                throwError({}, Messages.UnexpectedToken, 'ILLEGAL');
+            }
+            id = ch;
+        }
+
+        while (index < length) {
+            ch = source.charCodeAt(index);
+            if (!isIdentifierPart(ch)) {
+                break;
+            }
+            ++index;
+            id += String.fromCharCode(ch);
+
+            // '\u' (char #92, char #117) denotes an escaped character.
+            if (ch === 92) {
+                id = id.substr(0, id.length - 1);
+                if (source.charCodeAt(index) !== 117) {
+                    throwError({}, Messages.UnexpectedToken, 'ILLEGAL');
+                }
+                ++index;
+                ch = scanHexEscape('u');
+                if (!ch || ch === '\\' || !isIdentifierPart(ch.charCodeAt(0))) {
+                    throwError({}, Messages.UnexpectedToken, 'ILLEGAL');
+                }
+                id += ch;
+            }
+        }
+
+        return id;
+    }
+
+    function getIdentifier() {
+        var start, ch;
+
+        start = index++;
+        while (index < length) {
+            ch = source.charCodeAt(index);
+            if (ch === 92) {
+                // Blackslash (char #92) marks Unicode escape sequence.
+                index = start;
+                return getEscapedIdentifier();
+            }
+            if (isIdentifierPart(ch)) {
+                ++index;
+            } else {
+                break;
+            }
+        }
+
+        return source.slice(start, index);
+    }
+
+    function scanIdentifier() {
+        var start, id, type;
+
+        start = index;
+
+        // Backslash (char #92) starts an escaped character.
+        id = (source.charCodeAt(index) === 92) ? getEscapedIdentifier() : getIdentifier();
+
+        // There is no keyword or literal with only one character.
+        // Thus, it must be an identifier.
+        if (id.length === 1) {
+            type = Token.Identifier;
+        } else if (isKeyword(id)) {
+            type = Token.Keyword;
+        } else if (id === 'null') {
+            type = Token.NullLiteral;
+        } else if (id === 'true' || id === 'false') {
+            type = Token.BooleanLiteral;
+        } else {
+            type = Token.Identifier;
+        }
+
+        return {
+            type: type,
+            value: id,
+            lineNumber: lineNumber,
+            lineStart: lineStart,
+            range: [start, index]
+        };
+    }
+
+
+    // 7.7 Punctuators
+
+    function scanPunctuator() {
+        var start = index,
+            code = source.charCodeAt(index),
+            code2,
+            ch1 = source[index],
+            ch2,
+            ch3,
+            ch4;
+
+        switch (code) {
+        // Check for most common single-character punctuators.
+        case 40:   // ( open bracket
+        case 41:   // ) close bracket
+        case 59:   // ; semicolon
+        case 44:   // , comma
+        case 123:  // { open curly brace
+        case 125:  // } close curly brace
+        case 91:   // [
+        case 93:   // ]
+        case 58:   // :
+        case 63:   // ?
+        case 126:  // ~
+            ++index;
+            if (extra.tokenize) {
+                if (code === 40) {
+                    extra.openParenToken = extra.tokens.length;
+                } else if (code === 123) {
+                    extra.openCurlyToken = extra.tokens.length;
+                }
+            }
+            return {
+                type: Token.Punctuator,
+                value: String.fromCharCode(code),
+                lineNumber: lineNumber,
+                lineStart: lineStart,
+                range: [start, index]
+            };
+
+        default:
+            code2 = source.charCodeAt(index + 1);
+
+            // '=' (char #61) marks an assignment or comparison operator.
+            if (code2 === 61) {
+                switch (code) {
+                case 37:  // %
+                case 38:  // &
+                case 42:  // *:
+                case 43:  // +
+                case 45:  // -
+                case 47:  // /
+                case 60:  // <
+                case 62:  // >
+                case 94:  // ^
+                case 124: // |
+                    index += 2;
+                    return {
+                        type: Token.Punctuator,
+                        value: String.fromCharCode(code) + String.fromCharCode(code2),
+                        lineNumber: lineNumber,
+                        lineStart: lineStart,
+                        range: [start, index]
+                    };
+
+                case 33: // !
+                case 61: // =
+                    index += 2;
+
+                    // !== and ===
+                    if (source.charCodeAt(index) === 61) {
+                        ++index;
+                    }
+                    return {
+                        type: Token.Punctuator,
+                        value: source.slice(start, index),
+                        lineNumber: lineNumber,
+                        lineStart: lineStart,
+                        range: [start, index]
+                    };
+                default:
+                    break;
+                }
+            }
+            break;
+        }
+
+        // Peek more characters.
+
+        ch2 = source[index + 1];
+        ch3 = source[index + 2];
+        ch4 = source[index + 3];
+
+        // 4-character punctuator: >>>=
+
+        if (ch1 === '>' && ch2 === '>' && ch3 === '>') {
+            if (ch4 === '=') {
+                index += 4;
+                return {
+                    type: Token.Punctuator,
+                    value: '>>>=',
+                    lineNumber: lineNumber,
+                    lineStart: lineStart,
+                    range: [start, index]
+                };
+            }
+        }
+
+        // 3-character punctuators: === !== >>> <<= >>=
+
+        if (ch1 === '>' && ch2 === '>' && ch3 === '>') {
+            index += 3;
+            return {
+                type: Token.Punctuator,
+                value: '>>>',
+                lineNumber: lineNumber,
+                lineStart: lineStart,
+                range: [start, index]
+            };
+        }
+
+        if (ch1 === '<' && ch2 === '<' && ch3 === '=') {
+            index += 3;
+            return {
+                type: Token.Punctuator,
+                value: '<<=',
+                lineNumber: lineNumber,
+                lineStart: lineStart,
+                range: [start, index]
+            };
+        }
+
+        if (ch1 === '>' && ch2 === '>' && ch3 === '=') {
+            index += 3;
+            return {
+                type: Token.Punctuator,
+                value: '>>=',
+                lineNumber: lineNumber,
+                lineStart: lineStart,
+                range: [start, index]
+            };
+        }
+
+        if (ch1 === '.' && ch2 === '.' && ch3 === '.') {
+            index += 3;
+            return {
+                type: Token.Punctuator,
+                value: '...',
+                lineNumber: lineNumber,
+                lineStart: lineStart,
+                range: [start, index]
+            };
+        }
+
+        // Other 2-character punctuators: ++ -- << >> && ||
+
+        if (ch1 === ch2 && ('+-<>&|'.indexOf(ch1) >= 0)) {
+            index += 2;
+            return {
+                type: Token.Punctuator,
+                value: ch1 + ch2,
+                lineNumber: lineNumber,
+                lineStart: lineStart,
+                range: [start, index]
+            };
+        }
+
+        if (ch1 === '=' && ch2 === '>') {
+            index += 2;
+            return {
+                type: Token.Punctuator,
+                value: '=>',
+                lineNumber: lineNumber,
+                lineStart: lineStart,
+                range: [start, index]
+            };
+        }
+
+        if ('<>=!+-*%&|^/'.indexOf(ch1) >= 0) {
+            ++index;
+            return {
+                type: Token.Punctuator,
+                value: ch1,
+                lineNumber: lineNumber,
+                lineStart: lineStart,
+                range: [start, index]
+            };
+        }
+
+        if (ch1 === '.') {
+            ++index;
+            return {
+                type: Token.Punctuator,
+                value: ch1,
+                lineNumber: lineNumber,
+                lineStart: lineStart,
+                range: [start, index]
+            };
+        }
+
+        throwError({}, Messages.UnexpectedToken, 'ILLEGAL');
+    }
+
+    // 7.8.3 Numeric Literals
+
+    function scanHexLiteral(start) {
+        var number = '';
+
+        while (index < length) {
+            if (!isHexDigit(source[index])) {
+                break;
+            }
+            number += source[index++];
+        }
+
+        if (number.length === 0) {
+            throwError({}, Messages.UnexpectedToken, 'ILLEGAL');
+        }
+
+        if (isIdentifierStart(source.charCodeAt(index))) {
+            throwError({}, Messages.UnexpectedToken, 'ILLEGAL');
+        }
+
+        return {
+            type: Token.NumericLiteral,
+            value: parseInt('0x' + number, 16),
+            lineNumber: lineNumber,
+            lineStart: lineStart,
+            range: [start, index]
+        };
+    }
+
+    function scanOctalLiteral(prefix, start) {
+        var number, octal;
+
+        if (isOctalDigit(prefix)) {
+            octal = true;
+            number = '0' + source[index++];
+        } else {
+            octal = false;
+            ++index;
+            number = '';
+        }
+
+        while (index < length) {
+            if (!isOctalDigit(source[index])) {
+                break;
+            }
+            number += source[index++];
+        }
+
+        if (!octal && number.length === 0) {
+            // only 0o or 0O
+            throwError({}, Messages.UnexpectedToken, 'ILLEGAL');
+        }
+
+        if (isIdentifierStart(source.charCodeAt(index)) || isDecimalDigit(source.charCodeAt(index))) {
+            throwError({}, Messages.UnexpectedToken, 'ILLEGAL');
+        }
+
+        return {
+            type: Token.NumericLiteral,
+            value: parseInt(number, 8),
+            octal: octal,
+            lineNumber: lineNumber,
+            lineStart: lineStart,
+            range: [start, index]
+        };
+    }
+
+    function scanNumericLiteral() {
+        var number, start, ch, octal;
+
+        ch = source[index];
+        assert(isDecimalDigit(ch.charCodeAt(0)) || (ch === '.'),
+            'Numeric literal must start with a decimal digit or a decimal point');
+
+        start = index;
+        number = '';
+        if (ch !== '.') {
+            number = source[index++];
+            ch = source[index];
+
+            // Hex number starts with '0x'.
+            // Octal number starts with '0'.
+            // Octal number in ES6 starts with '0o'.
+            // Binary number in ES6 starts with '0b'.
+            if (number === '0') {
+                if (ch === 'x' || ch === 'X') {
+                    ++index;
+                    return scanHexLiteral(start);
+                }
+                if (ch === 'b' || ch === 'B') {
+                    ++index;
+                    number = '';
+
+                    while (index < length) {
+                        ch = source[index];
+                        if (ch !== '0' && ch !== '1') {
+                            break;
+                        }
+                        number += source[index++];
+                    }
+
+                    if (number.length === 0) {
+                        // only 0b or 0B
+                        throwError({}, Messages.UnexpectedToken, 'ILLEGAL');
+                    }
+
+                    if (index < length) {
+                        ch = source.charCodeAt(index);
+                        if (isIdentifierStart(ch) || isDecimalDigit(ch)) {
+                            throwError({}, Messages.UnexpectedToken, 'ILLEGAL');
+                        }
+                    }
+                    return {
+                        type: Token.NumericLiteral,
+                        value: parseInt(number, 2),
+                        lineNumber: lineNumber,
+                        lineStart: lineStart,
+                        range: [start, index]
+                    };
+                }
+                if (ch === 'o' || ch === 'O' || isOctalDigit(ch)) {
+                    return scanOctalLiteral(ch, start);
+                }
+                // decimal number starts with '0' such as '09' is illegal.
+                if (ch && isDecimalDigit(ch.charCodeAt(0))) {
+                    throwError({}, Messages.UnexpectedToken, 'ILLEGAL');
+                }
+            }
+
+            while (isDecimalDigit(source.charCodeAt(index))) {
+                number += source[index++];
+            }
+            ch = source[index];
+        }
+
+        if (ch === '.') {
+            number += source[index++];
+            while (isDecimalDigit(source.charCodeAt(index))) {
+                number += source[index++];
+            }
+            ch = source[index];
+        }
+
+        if (ch === 'e' || ch === 'E') {
+            number += source[index++];
+
+            ch = source[index];
+            if (ch === '+' || ch === '-') {
+                number += source[index++];
+            }
+            if (isDecimalDigit(source.charCodeAt(index))) {
+                while (isDecimalDigit(source.charCodeAt(index))) {
+                    number += source[index++];
+                }
+            } else {
+                throwError({}, Messages.UnexpectedToken, 'ILLEGAL');
+            }
+        }
+
+        if (isIdentifierStart(source.charCodeAt(index))) {
+            throwError({}, Messages.UnexpectedToken, 'ILLEGAL');
+        }
+
+        return {
+            type: Token.NumericLiteral,
+            value: parseFloat(number),
+            lineNumber: lineNumber,
+            lineStart: lineStart,
+            range: [start, index]
+        };
+    }
+
+    // 7.8.4 String Literals
+
+    function scanStringLiteral() {
+        var str = '', quote, start, ch, code, unescaped, restore, octal = false;
+
+        quote = source[index];
+        assert((quote === '\'' || quote === '"'),
+            'String literal must starts with a quote');
+
+        start = index;
+        ++index;
+
+        while (index < length) {
+            ch = source[index++];
+
+            if (ch === quote) {
+                quote = '';
+                break;
+            } else if (ch === '\\') {
+                ch = source[index++];
+                if (!ch || !isLineTerminator(ch.charCodeAt(0))) {
+                    switch (ch) {
+                    case 'n':
+                        str += '\n';
+                        break;
+                    case 'r':
+                        str += '\r';
+                        break;
+                    case 't':
+                        str += '\t';
+                        break;
+                    case 'u':
+                    case 'x':
+                        if (source[index] === '{') {
+                            ++index;
+                            str += scanUnicodeCodePointEscape();
+                        } else {
+                            restore = index;
+                            unescaped = scanHexEscape(ch);
+                            if (unescaped) {
+                                str += unescaped;
+                            } else {
+                                index = restore;
+                                str += ch;
+                            }
+                        }
+                        break;
+                    case 'b':
+                        str += '\b';
+                        break;
+                    case 'f':
+                        str += '\f';
+                        break;
+                    case 'v':
+                        str += '\x0B';
+                        break;
+
+                    default:
+                        if (isOctalDigit(ch)) {
+                            code = '01234567'.indexOf(ch);
+
+                            // \0 is not octal escape sequence
+                            if (code !== 0) {
+                                octal = true;
+                            }
+
+                            if (index < length && isOctalDigit(source[index])) {
+                                octal = true;
+                                code = code * 8 + '01234567'.indexOf(source[index++]);
+
+                                // 3 digits are only allowed when string starts
+                                // with 0, 1, 2, 3
+                                if ('0123'.indexOf(ch) >= 0 &&
+                                        index < length &&
+                                        isOctalDigit(source[index])) {
+                                    code = code * 8 + '01234567'.indexOf(source[index++]);
+                                }
+                            }
+                            str += String.fromCharCode(code);
+                        } else {
+                            str += ch;
+                        }
+                        break;
+                    }
+                } else {
+                    ++lineNumber;
+                    if (ch ===  '\r' && source[index] === '\n') {
+                        ++index;
+                    }
+                }
+            } else if (isLineTerminator(ch.charCodeAt(0))) {
+                break;
+            } else {
+                str += ch;
+            }
+        }
+
+        if (quote !== '') {
+            throwError({}, Messages.UnexpectedToken, 'ILLEGAL');
+        }
+
+        return {
+            type: Token.StringLiteral,
+            value: str,
+            octal: octal,
+            lineNumber: lineNumber,
+            lineStart: lineStart,
+            range: [start, index]
+        };
+    }
+
+    function scanTemplate() {
+        var cooked = '', ch, start, terminated, tail, restore, unescaped, code, octal;
+
+        terminated = false;
+        tail = false;
+        start = index;
+
+        ++index;
+
+        while (index < length) {
+            ch = source[index++];
+            if (ch === '`') {
+                tail = true;
+                terminated = true;
+                break;
+            } else if (ch === '$') {
+                if (source[index] === '{') {
+                    ++index;
+                    terminated = true;
+                    break;
+                }
+                cooked += ch;
+            } else if (ch === '\\') {
+                ch = source[index++];
+                if (!isLineTerminator(ch.charCodeAt(0))) {
+                    switch (ch) {
+                    case 'n':
+                        cooked += '\n';
+                        break;
+                    case 'r':
+                        cooked += '\r';
+                        break;
+                    case 't':
+                        cooked += '\t';
+                        break;
+                    case 'u':
+                    case 'x':
+                        if (source[index] === '{') {
+                            ++index;
+                            cooked += scanUnicodeCodePointEscape();
+                        } else {
+                            restore = index;
+                            unescaped = scanHexEscape(ch);
+                            if (unescaped) {
+                                cooked += unescaped;
+                            } else {
+                                index = restore;
+                                cooked += ch;
+                            }
+                        }
+                        break;
+                    case 'b':
+                        cooked += '\b';
+                        break;
+                    case 'f':
+                        cooked += '\f';
+                        break;
+                    case 'v':
+                        cooked += '\v';
+                        break;
+
+                    default:
+                        if (isOctalDigit(ch)) {
+                            code = '01234567'.indexOf(ch);
+
+                            // \0 is not octal escape sequence
+                            if (code !== 0) {
+                                octal = true;
+                            }
+
+                            if (index < length && isOctalDigit(source[index])) {
+                                octal = true;
+                                code = code * 8 + '01234567'.indexOf(source[index++]);
+
+                                // 3 digits are only allowed when string starts
+                                // with 0, 1, 2, 3
+                                if ('0123'.indexOf(ch) >= 0 &&
+                                        index < length &&
+                                        isOctalDigit(source[index])) {
+                                    code = code * 8 + '01234567'.indexOf(source[index++]);
+                                }
+                            }
+                            cooked += String.fromCharCode(code);
+                        } else {
+                            cooked += ch;
+                        }
+                        break;
+                    }
+                } else {
+                    ++lineNumber;
+                    if (ch ===  '\r' && source[index] === '\n') {
+                        ++index;
+                    }
+                }
+            } else if (isLineTerminator(ch.charCodeAt(0))) {
+                ++lineNumber;
+                if (ch ===  '\r' && source[index] === '\n') {
+                    ++index;
+                }
+                cooked += '\n';
+            } else {
+                cooked += ch;
+            }
+        }
+
+        if (!terminated) {
+            throwError({}, Messages.UnexpectedToken, 'ILLEGAL');
+        }
+
+        return {
+            type: Token.Template,
+            value: {
+                cooked: cooked,
+                raw: source.slice(start + 1, index - ((tail) ? 1 : 2))
+            },
+            tail: tail,
+            octal: octal,
+            lineNumber: lineNumber,
+            lineStart: lineStart,
+            range: [start, index]
+        };
+    }
+
+    function scanTemplateElement(option) {
+        var startsWith, template;
+
+        lookahead = null;
+        skipComment();
+
+        startsWith = (option.head) ? '`' : '}';
+
+        if (source[index] !== startsWith) {
+            throwError({}, Messages.UnexpectedToken, 'ILLEGAL');
+        }
+
+        template = scanTemplate();
+
+        peek();
+
+        return template;
+    }
+
+    function scanRegExp() {
+        var str, ch, start, pattern, flags, value, classMarker = false, restore, terminated = false;
+
+        lookahead = null;
+        skipComment();
+
+        start = index;
+        ch = source[index];
+        assert(ch === '/', 'Regular expression literal must start with a slash');
+        str = source[index++];
+
+        while (index < length) {
+            ch = source[index++];
+            str += ch;
+            if (classMarker) {
+                if (ch === ']') {
+                    classMarker = false;
+                }
+            } else {
+                if (ch === '\\') {
+                    ch = source[index++];
+                    // ECMA-262 7.8.5
+                    if (isLineTerminator(ch.charCodeAt(0))) {
+                        throwError({}, Messages.UnterminatedRegExp);
+                    }
+                    str += ch;
+                } else if (ch === '/') {
+                    terminated = true;
+                    break;
+                } else if (ch === '[') {
+                    classMarker = true;
+                } else if (isLineTerminator(ch.charCodeAt(0))) {
+                    throwError({}, Messages.UnterminatedRegExp);
+                }
+            }
+        }
+
+        if (!terminated) {
+            throwError({}, Messages.UnterminatedRegExp);
+        }
+
+        // Exclude leading and trailing slash.
+        pattern = str.substr(1, str.length - 2);
+
+        flags = '';
+        while (index < length) {
+            ch = source[index];
+            if (!isIdentifierPart(ch.charCodeAt(0))) {
+                break;
+            }
+
+            ++index;
+            if (ch === '\\' && index < length) {
+                ch = source[index];
+                if (ch === 'u') {
+                    ++index;
+                    restore = index;
+                    ch = scanHexEscape('u');
+                    if (ch) {
+                        flags += ch;
+                        for (str += '\\u'; restore < index; ++restore) {
+                            str += source[restore];
+                        }
+                    } else {
+                        index = restore;
+                        flags += 'u';
+                        str += '\\u';
+                    }
+                } else {
+                    str += '\\';
+                }
+            } else {
+                flags += ch;
+                str += ch;
+            }
+        }
+
+        try {
+            value = new RegExp(pattern, flags);
+        } catch (e) {
+            throwError({}, Messages.InvalidRegExp);
+        }
+
+        peek();
+
+
+        if (extra.tokenize) {
+            return {
+                type: Token.RegularExpression,
+                value: value,
+                lineNumber: lineNumber,
+                lineStart: lineStart,
+                range: [start, index]
+            };
+        }
+        return {
+            literal: str,
+            value: value,
+            range: [start, index]
+        };
+    }
+
+    function isIdentifierName(token) {
+        return token.type === Token.Identifier ||
+            token.type === Token.Keyword ||
+            token.type === Token.BooleanLiteral ||
+            token.type === Token.NullLiteral;
+    }
+
+    function advanceSlash() {
+        var prevToken,
+            checkToken;
+        // Using the following algorithm:
+        // https://github.com/mozilla/sweet.js/wiki/design
+        prevToken = extra.tokens[extra.tokens.length - 1];
+        if (!prevToken) {
+            // Nothing before that: it cannot be a division.
+            return scanRegExp();
+        }
+        if (prevToken.type === 'Punctuator') {
+            if (prevToken.value === ')') {
+                checkToken = extra.tokens[extra.openParenToken - 1];
+                if (checkToken &&
+                        checkToken.type === 'Keyword' &&
+                        (checkToken.value === 'if' ||
+                         checkToken.value === 'while' ||
+                         checkToken.value === 'for' ||
+                         checkToken.value === 'with')) {
+                    return scanRegExp();
+                }
+                return scanPunctuator();
+            }
+            if (prevToken.value === '}') {
+                // Dividing a function by anything makes little sense,
+                // but we have to check for that.
+                if (extra.tokens[extra.openCurlyToken - 3] &&
+                        extra.tokens[extra.openCurlyToken - 3].type === 'Keyword') {
+                    // Anonymous function.
+                    checkToken = extra.tokens[extra.openCurlyToken - 4];
+                    if (!checkToken) {
+                        return scanPunctuator();
+                    }
+                } else if (extra.tokens[extra.openCurlyToken - 4] &&
+                        extra.tokens[extra.openCurlyToken - 4].type === 'Keyword') {
+                    // Named function.
+                    checkToken = extra.tokens[extra.openCurlyToken - 5];
+                    if (!checkToken) {
+                        return scanRegExp();
+                    }
+                } else {
+                    return scanPunctuator();
+                }
+                // checkToken determines whether the function is
+                // a declaration or an expression.
+                if (FnExprTokens.indexOf(checkToken.value) >= 0) {
+                    // It is an expression.
+                    return scanPunctuator();
+                }
+                // It is a declaration.
+                return scanRegExp();
+            }
+            return scanRegExp();
+        }
+        if (prevToken.type === 'Keyword') {
+            return scanRegExp();
+        }
+        return scanPunctuator();
+    }
+
+    function advance() {
+        var ch;
+
+        if (!state.inXJSChild) {
+            skipComment();
+        }
+
+        if (index >= length) {
+            return {
+                type: Token.EOF,
+                lineNumber: lineNumber,
+                lineStart: lineStart,
+                range: [index, index]
+            };
+        }
+
+        if (state.inXJSChild) {
+            return advanceXJSChild();
+        }
+
+        ch = source.charCodeAt(index);
+
+        // Very common: ( and ) and ;
+        if (ch === 40 || ch === 41 || ch === 58) {
+            return scanPunctuator();
+        }
+
+        // String literal starts with single quote (#39) or double quote (#34).
+        if (ch === 39 || ch === 34) {
+            if (state.inXJSTag) {
+                return scanXJSStringLiteral();
+            }
+            return scanStringLiteral();
+        }
+
+        if (state.inXJSTag && isXJSIdentifierStart(ch)) {
+            return scanXJSIdentifier();
+        }
+
+        if (ch === 96) {
+            return scanTemplate();
+        }
+        if (isIdentifierStart(ch)) {
+            return scanIdentifier();
+        }
+
+        // Dot (.) char #46 can also start a floating-point number, hence the need
+        // to check the next character.
+        if (ch === 46) {
+            if (isDecimalDigit(source.charCodeAt(index + 1))) {
+                return scanNumericLiteral();
+            }
+            return scanPunctuator();
+        }
+
+        if (isDecimalDigit(ch)) {
+            return scanNumericLiteral();
+        }
+
+        // Slash (/) char #47 can also start a regex.
+        if (extra.tokenize && ch === 47) {
+            return advanceSlash();
+        }
+
+        return scanPunctuator();
+    }
+
+    function lex() {
+        var token;
+
+        token = lookahead;
+        index = token.range[1];
+        lineNumber = token.lineNumber;
+        lineStart = token.lineStart;
+
+        lookahead = advance();
+
+        index = token.range[1];
+        lineNumber = token.lineNumber;
+        lineStart = token.lineStart;
+
+        return token;
+    }
+
+    function peek() {
+        var pos, line, start;
+
+        pos = index;
+        line = lineNumber;
+        start = lineStart;
+        lookahead = advance();
+        index = pos;
+        lineNumber = line;
+        lineStart = start;
+    }
+
+    function lookahead2() {
+        var adv, pos, line, start, result;
+
+        // If we are collecting the tokens, don't grab the next one yet.
+        adv = (typeof extra.advance === 'function') ? extra.advance : advance;
+
+        pos = index;
+        line = lineNumber;
+        start = lineStart;
+
+        // Scan for the next immediate token.
+        if (lookahead === null) {
+            lookahead = adv();
+        }
+        index = lookahead.range[1];
+        lineNumber = lookahead.lineNumber;
+        lineStart = lookahead.lineStart;
+
+        // Grab the token right after.
+        result = adv();
+        index = pos;
+        lineNumber = line;
+        lineStart = start;
+
+        return result;
+    }
+
+    function markerCreate() {
+        if (!extra.loc && !extra.range) {
+            return undefined;
+        }
+        skipComment();
+        return {offset: index, line: lineNumber, col: index - lineStart};
+    }
+
+    function markerCreatePreserveWhitespace() {
+        if (!extra.loc && !extra.range) {
+            return undefined;
+        }
+        return {offset: index, line: lineNumber, col: index - lineStart};
+    }
+
+    function markerApply(marker, node) {
+        if (extra.range) {
+            node.range = [marker.offset, index];
+        }
+        if (extra.loc) {
+            node.loc = {
+                start: {
+                    line: marker.line,
+                    column: marker.col
+                },
+                end: {
+                    line: lineNumber,
+                    column: index - lineStart
+                }
+            };
+            node = delegate.postProcess(node);
+        }
+        return node;
+    }
+
+    SyntaxTreeDelegate = {
+
+        name: 'SyntaxTree',
+
+        postProcess: function (node) {
+            return node;
+        },
+
+        createArrayExpression: function (elements) {
+            return {
+                type: Syntax.ArrayExpression,
+                elements: elements
+            };
+        },
+
+        createAssignmentExpression: function (operator, left, right) {
+            return {
+                type: Syntax.AssignmentExpression,
+                operator: operator,
+                left: left,
+                right: right
+            };
+        },
+
+        createBinaryExpression: function (operator, left, right) {
+            var type = (operator === '||' || operator === '&&') ? Syntax.LogicalExpression :
+                        Syntax.BinaryExpression;
+            return {
+                type: type,
+                operator: operator,
+                left: left,
+                right: right
+            };
+        },
+
+        createBlockStatement: function (body) {
+            return {
+                type: Syntax.BlockStatement,
+                body: body
+            };
+        },
+
+        createBreakStatement: function (label) {
+            return {
+                type: Syntax.BreakStatement,
+                label: label
+            };
+        },
+
+        createCallExpression: function (callee, args) {
+            return {
+                type: Syntax.CallExpression,
+                callee: callee,
+                'arguments': args
+            };
+        },
+
+        createCatchClause: function (param, body) {
+            return {
+                type: Syntax.CatchClause,
+                param: param,
+                body: body
+            };
+        },
+
+        createConditionalExpression: function (test, consequent, alternate) {
+            return {
+                type: Syntax.ConditionalExpression,
+                test: test,
+                consequent: consequent,
+                alternate: alternate
+            };
+        },
+
+        createContinueStatement: function (label) {
+            return {
+                type: Syntax.ContinueStatement,
+                label: label
+            };
+        },
+
+        createDebuggerStatement: function () {
+            return {
+                type: Syntax.DebuggerStatement
+            };
+        },
+
+        createDoWhileStatement: function (body, test) {
+            return {
+                type: Syntax.DoWhileStatement,
+                body: body,
+                test: test
+            };
+        },
+
+        createEmptyStatement: function () {
+            return {
+                type: Syntax.EmptyStatement
+            };
+        },
+
+        createExpressionStatement: function (expression) {
+            return {
+                type: Syntax.ExpressionStatement,
+                expression: expression
+            };
+        },
+
+        createForStatement: function (init, test, update, body) {
+            return {
+                type: Syntax.ForStatement,
+                init: init,
+                test: test,
+                update: update,
+                body: body
+            };
+        },
+
+        createForInStatement: function (left, right, body) {
+            return {
+                type: Syntax.ForInStatement,
+                left: left,
+                right: right,
+                body: body,
+                each: false
+            };
+        },
+
+        createForOfStatement: function (left, right, body) {
+            return {
+                type: Syntax.ForOfStatement,
+                left: left,
+                right: right,
+                body: body
+            };
+        },
+
+        createFunctionDeclaration: function (id, params, defaults, body, rest, generator, expression,
+                                             returnType, parametricType) {
+            return {
+                type: Syntax.FunctionDeclaration,
+                id: id,
+                params: params,
+                defaults: defaults,
+                body: body,
+                rest: rest,
+                generator: generator,
+                expression: expression,
+                returnType: returnType,
+                parametricType: parametricType
+            };
+        },
+
+        createFunctionExpression: function (id, params, defaults, body, rest, generator, expression,
+                                            returnType, parametricType) {
+            return {
+                type: Syntax.FunctionExpression,
+                id: id,
+                params: params,
+                defaults: defaults,
+                body: body,
+                rest: rest,
+                generator: generator,
+                expression: expression,
+                returnType: returnType,
+                parametricType: parametricType
+            };
+        },
+
+        createIdentifier: function (name) {
+            return {
+                type: Syntax.Identifier,
+                name: name,
+                // Only here to initialize the shape of the object to ensure
+                // that the 'typeAnnotation' key is ordered before others that
+                // are added later (like 'loc' and 'range'). This just helps
+                // keep the shape of Identifier nodes consistent with everything
+                // else.
+                typeAnnotation: undefined
+            };
+        },
+
+        createTypeAnnotation: function (typeIdentifier, parametricType, params, returnType, nullable) {
+            return {
+                type: Syntax.TypeAnnotation,
+                id: typeIdentifier,
+                parametricType: parametricType,
+                params: params,
+                returnType: returnType,
+                nullable: nullable
+            };
+        },
+
+        createParametricTypeAnnotation: function (parametricTypes) {
+            return {
+                type: Syntax.ParametricTypeAnnotation,
+                params: parametricTypes
+            };
+        },
+
+        createVoidTypeAnnotation: function () {
+            return {
+                type: Syntax.VoidTypeAnnotation
+            };
+        },
+
+        createObjectTypeAnnotation: function (properties) {
+            return {
+                type: Syntax.ObjectTypeAnnotation,
+                properties: properties
+            };
+        },
+
+        createTypeAnnotatedIdentifier: function (identifier, annotation, isOptionalParam) {
+            return {
+                type: Syntax.TypeAnnotatedIdentifier,
+                id: identifier,
+                annotation: annotation
+            };
+        },
+
+        createOptionalParameter: function (identifier) {
+            return {
+                type: Syntax.OptionalParameter,
+                id: identifier
+            };
+        },
+
+        createXJSAttribute: function (name, value) {
+            return {
+                type: Syntax.XJSAttribute,
+                name: name,
+                value: value
+            };
+        },
+
+        createXJSSpreadAttribute: function (argument) {
+            return {
+                type: Syntax.XJSSpreadAttribute,
+                argument: argument
+            };
+        },
+
+        createXJSIdentifier: function (name) {
+            return {
+                type: Syntax.XJSIdentifier,
+                name: name
+            };
+        },
+
+        createXJSNamespacedName: function (namespace, name) {
+            return {
+                type: Syntax.XJSNamespacedName,
+                namespace: namespace,
+                name: name
+            };
+        },
+
+        createXJSMemberExpression: function (object, property) {
+            return {
+                type: Syntax.XJSMemberExpression,
+                object: object,
+                property: property
+            };
+        },
+
+        createXJSElement: function (openingElement, closingElement, children) {
+            return {
+                type: Syntax.XJSElement,
+                openingElement: openingElement,
+                closingElement: closingElement,
+                children: children
+            };
+        },
+
+        createXJSEmptyExpression: function () {
+            return {
+                type: Syntax.XJSEmptyExpression
+            };
+        },
+
+        createXJSExpressionContainer: function (expression) {
+            return {
+                type: Syntax.XJSExpressionContainer,
+                expression: expression
+            };
+        },
+
+        createXJSOpeningElement: function (name, attributes, selfClosing) {
+            return {
+                type: Syntax.XJSOpeningElement,
+                name: name,
+                selfClosing: selfClosing,
+                attributes: attributes
+            };
+        },
+
+        createXJSClosingElement: function (name) {
+            return {
+                type: Syntax.XJSClosingElement,
+                name: name
+            };
+        },
+
+        createIfStatement: function (test, consequent, alternate) {
+            return {
+                type: Syntax.IfStatement,
+                test: test,
+                consequent: consequent,
+                alternate: alternate
+            };
+        },
+
+        createLabeledStatement: function (label, body) {
+            return {
+                type: Syntax.LabeledStatement,
+                label: label,
+                body: body
+            };
+        },
+
+        createLiteral: function (token) {
+            return {
+                type: Syntax.Literal,
+                value: token.value,
+                raw: source.slice(token.range[0], token.range[1])
+            };
+        },
+
+        createMemberExpression: function (accessor, object, property) {
+            return {
+                type: Syntax.MemberExpression,
+                computed: accessor === '[',
+                object: object,
+                property: property
+            };
+        },
+
+        createNewExpression: function (callee, args) {
+            return {
+                type: Syntax.NewExpression,
+                callee: callee,
+                'arguments': args
+            };
+        },
+
+        createObjectExpression: function (properties) {
+            return {
+                type: Syntax.ObjectExpression,
+                properties: properties
+            };
+        },
+
+        createPostfixExpression: function (operator, argument) {
+            return {
+                type: Syntax.UpdateExpression,
+                operator: operator,
+                argument: argument,
+                prefix: false
+            };
+        },
+
+        createProgram: function (body) {
+            return {
+                type: Syntax.Program,
+                body: body
+            };
+        },
+
+        createProperty: function (kind, key, value, method, shorthand, computed) {
+            return {
+                type: Syntax.Property,
+                key: key,
+                value: value,
+                kind: kind,
+                method: method,
+                shorthand: shorthand,
+                computed: computed
+            };
+        },
+
+        createReturnStatement: function (argument) {
+            return {
+                type: Syntax.ReturnStatement,
+                argument: argument
+            };
+        },
+
+        createSequenceExpression: function (expressions) {
+            return {
+                type: Syntax.SequenceExpression,
+                expressions: expressions
+            };
+        },
+
+        createSwitchCase: function (test, consequent) {
+            return {
+                type: Syntax.SwitchCase,
+                test: test,
+                consequent: consequent
+            };
+        },
+
+        createSwitchStatement: function (discriminant, cases) {
+            return {
+                type: Syntax.SwitchStatement,
+                discriminant: discriminant,
+                cases: cases
+            };
+        },
+
+        createThisExpression: function () {
+            return {
+                type: Syntax.ThisExpression
+            };
+        },
+
+        createThrowStatement: function (argument) {
+            return {
+                type: Syntax.ThrowStatement,
+                argument: argument
+            };
+        },
+
+        createTryStatement: function (block, guardedHandlers, handlers, finalizer) {
+            return {
+                type: Syntax.TryStatement,
+                block: block,
+                guardedHandlers: guardedHandlers,
+                handlers: handlers,
+                finalizer: finalizer
+            };
+        },
+
+        createUnaryExpression: function (operator, argument) {
+            if (operator === '++' || operator === '--') {
+                return {
+                    type: Syntax.UpdateExpression,
+                    operator: operator,
+                    argument: argument,
+                    prefix: true
+                };
+            }
+            return {
+                type: Syntax.UnaryExpression,
+                operator: operator,
+                argument: argument,
+                prefix: true
+            };
+        },
+
+        createVariableDeclaration: function (declarations, kind) {
+            return {
+                type: Syntax.VariableDeclaration,
+                declarations: declarations,
+                kind: kind
+            };
+        },
+
+        createVariableDeclarator: function (id, init) {
+            return {
+                type: Syntax.VariableDeclarator,
+                id: id,
+                init: init
+            };
+        },
+
+        createWhileStatement: function (test, body) {
+            return {
+                type: Syntax.WhileStatement,
+                test: test,
+                body: body
+            };
+        },
+
+        createWithStatement: function (object, body) {
+            return {
+                type: Syntax.WithStatement,
+                object: object,
+                body: body
+            };
+        },
+
+        createTemplateElement: function (value, tail) {
+            return {
+                type: Syntax.TemplateElement,
+                value: value,
+                tail: tail
+            };
+        },
+
+        createTemplateLiteral: function (quasis, expressions) {
+            return {
+                type: Syntax.TemplateLiteral,
+                quasis: quasis,
+                expressions: expressions
+            };
+        },
+
+        createSpreadElement: function (argument) {
+            return {
+                type: Syntax.SpreadElement,
+                argument: argument
+            };
+        },
+
+        createSpreadProperty: function (argument) {
+            return {
+                type: Syntax.SpreadProperty,
+                argument: argument
+            };
+        },
+
+        createTaggedTemplateExpression: function (tag, quasi) {
+            return {
+                type: Syntax.TaggedTemplateExpression,
+                tag: tag,
+                quasi: quasi
+            };
+        },
+
+        createArrowFunctionExpression: function (params, defaults, body, rest, expression) {
+            return {
+                type: Syntax.ArrowFunctionExpression,
+                id: null,
+                params: params,
+                defaults: defaults,
+                body: body,
+                rest: rest,
+                generator: false,
+                expression: expression
+            };
+        },
+
+        createMethodDefinition: function (propertyType, kind, key, value) {
+            return {
+                type: Syntax.MethodDefinition,
+                key: key,
+                value: value,
+                kind: kind,
+                'static': propertyType === ClassPropertyType["static"]
+            };
+        },
+
+        createClassProperty: function (propertyIdentifier) {
+            return {
+                type: Syntax.ClassProperty,
+                id: propertyIdentifier
+            };
+        },
+
+        createClassBody: function (body) {
+            return {
+                type: Syntax.ClassBody,
+                body: body
+            };
+        },
+
+        createClassExpression: function (id, superClass, body, parametricType) {
+            return {
+                type: Syntax.ClassExpression,
+                id: id,
+                superClass: superClass,
+                body: body,
+                parametricType: parametricType
+            };
+        },
+
+        createClassDeclaration: function (id, superClass, body, parametricType, superParametricType) {
+            return {
+                type: Syntax.ClassDeclaration,
+                id: id,
+                superClass: superClass,
+                body: body,
+                parametricType: parametricType,
+                superParametricType: superParametricType
+            };
+        },
+
+        createExportSpecifier: function (id, name) {
+            return {
+                type: Syntax.ExportSpecifier,
+                id: id,
+                name: name
+            };
+        },
+
+        createExportBatchSpecifier: function () {
+            return {
+                type: Syntax.ExportBatchSpecifier
+            };
+        },
+
+        createExportDeclaration: function (declaration, specifiers, source) {
+            return {
+                type: Syntax.ExportDeclaration,
+                declaration: declaration,
+                specifiers: specifiers,
+                source: source
+            };
+        },
+
+        createImportSpecifier: function (id, name) {
+            return {
+                type: Syntax.ImportSpecifier,
+                id: id,
+                name: name
+            };
+        },
+
+        createImportDeclaration: function (specifiers, kind, source) {
+            return {
+                type: Syntax.ImportDeclaration,
+                specifiers: specifiers,
+                kind: kind,
+                source: source
+            };
+        },
+
+        createYieldExpression: function (argument, delegate) {
+            return {
+                type: Syntax.YieldExpression,
+                argument: argument,
+                delegate: delegate
+            };
+        },
+
+        createModuleDeclaration: function (id, source, body) {
+            return {
+                type: Syntax.ModuleDeclaration,
+                id: id,
+                source: source,
+                body: body
+            };
+        },
+
+        createComprehensionExpression: function (filter, blocks, body) {
+            return {
+                type: Syntax.ComprehensionExpression,
+                filter: filter,
+                blocks: blocks,
+                body: body
+            };
+        }
+
+    };
+
+    // Return true if there is a line terminator before the next token.
+
+    function peekLineTerminator() {
+        var pos, line, start, found;
+
+        pos = index;
+        line = lineNumber;
+        start = lineStart;
+        skipComment();
+        found = lineNumber !== line;
+        index = pos;
+        lineNumber = line;
+        lineStart = start;
+
+        return found;
+    }
+
+    // Throw an exception
+
+    function throwError(token, messageFormat) {
+        var error,
+            args = Array.prototype.slice.call(arguments, 2),
+            msg = messageFormat.replace(
+                /%(\d)/g,
+                function (whole, index) {
+                    assert(index < args.length, 'Message reference must be in range');
+                    return args[index];
+                }
+            );
+
+        if (typeof token.lineNumber === 'number') {
+            error = new Error('Line ' + token.lineNumber + ': ' + msg);
+            error.index = token.range[0];
+            error.lineNumber = token.lineNumber;
+            error.column = token.range[0] - lineStart + 1;
+        } else {
+            error = new Error('Line ' + lineNumber + ': ' + msg);
+            error.index = index;
+            error.lineNumber = lineNumber;
+            error.column = index - lineStart + 1;
+        }
+
+        error.description = msg;
+        throw error;
+    }
+
+    function throwErrorTolerant() {
+        try {
+            throwError.apply(null, arguments);
+        } catch (e) {
+            if (extra.errors) {
+                extra.errors.push(e);
+            } else {
+                throw e;
+            }
+        }
+    }
+
+
+    // Throw an exception because of the token.
+
+    function throwUnexpected(token) {
+        if (token.type === Token.EOF) {
+            throwError(token, Messages.UnexpectedEOS);
+        }
+
+        if (token.type === Token.NumericLiteral) {
+            throwError(token, Messages.UnexpectedNumber);
+        }
+
+        if (token.type === Token.StringLiteral || token.type === Token.XJSText) {
+            throwError(token, Messages.UnexpectedString);
+        }
+
+        if (token.type === Token.Identifier) {
+            throwError(token, Messages.UnexpectedIdentifier);
+        }
+
+        if (token.type === Token.Keyword) {
+            if (isFutureReservedWord(token.value)) {
+                throwError(token, Messages.UnexpectedReserved);
+            } else if (strict && isStrictModeReservedWord(token.value)) {
+                throwErrorTolerant(token, Messages.StrictReservedWord);
+                return;
+            }
+            throwError(token, Messages.UnexpectedToken, token.value);
+        }
+
+        if (token.type === Token.Template) {
+            throwError(token, Messages.UnexpectedTemplate, token.value.raw);
+        }
+
+        // BooleanLiteral, NullLiteral, or Punctuator.
+        throwError(token, Messages.UnexpectedToken, token.value);
+    }
+
+    // Expect the next token to match the specified punctuator.
+    // If not, an exception will be thrown.
+
+    function expect(value) {
+        var token = lex();
+        if (token.type !== Token.Punctuator || token.value !== value) {
+            throwUnexpected(token);
+        }
+    }
+
+    // Expect the next token to match the specified keyword.
+    // If not, an exception will be thrown.
+
+    function expectKeyword(keyword) {
+        var token = lex();
+        if (token.type !== Token.Keyword || token.value !== keyword) {
+            throwUnexpected(token);
+        }
+    }
+
+    // Return true if the next token matches the specified punctuator.
+
+    function match(value) {
+        return lookahead.type === Token.Punctuator && lookahead.value === value;
+    }
+
+    // Return true if the next token matches the specified keyword
+
+    function matchKeyword(keyword) {
+        return lookahead.type === Token.Keyword && lookahead.value === keyword;
+    }
+
+
+    // Return true if the next token matches the specified contextual keyword
+
+    function matchContextualKeyword(keyword) {
+        return lookahead.type === Token.Identifier && lookahead.value === keyword;
+    }
+
+    // Return true if the next token is an assignment operator
+
+    function matchAssign() {
+        var op;
+
+        if (lookahead.type !== Token.Punctuator) {
+            return false;
+        }
+        op = lookahead.value;
+        return op === '=' ||
+            op === '*=' ||
+            op === '/=' ||
+            op === '%=' ||
+            op === '+=' ||
+            op === '-=' ||
+            op === '<<=' ||
+            op === '>>=' ||
+            op === '>>>=' ||
+            op === '&=' ||
+            op === '^=' ||
+            op === '|=';
+    }
+
+    function consumeSemicolon() {
+        var line;
+
+        // Catch the very common case first: immediately a semicolon (char #59).
+        if (source.charCodeAt(index) === 59) {
+            lex();
+            return;
+        }
+
+        line = lineNumber;
+        skipComment();
+        if (lineNumber !== line) {
+            return;
+        }
+
+        if (match(';')) {
+            lex();
+            return;
+        }
+
+        if (lookahead.type !== Token.EOF && !match('}')) {
+            throwUnexpected(lookahead);
+        }
+    }
+
+    // Return true if provided expression is LeftHandSideExpression
+
+    function isLeftHandSide(expr) {
+        return expr.type === Syntax.Identifier || expr.type === Syntax.MemberExpression;
+    }
+
+    function isAssignableLeftHandSide(expr) {
+        return isLeftHandSide(expr) || expr.type === Syntax.ObjectPattern || expr.type === Syntax.ArrayPattern;
+    }
+
+    // 11.1.4 Array Initialiser
+
+    function parseArrayInitialiser() {
+        var elements = [], blocks = [], filter = null, tmp, possiblecomprehension = true, body,
+            marker = markerCreate();
+
+        expect('[');
+        while (!match(']')) {
+            if (lookahead.value === 'for' &&
+                    lookahead.type === Token.Keyword) {
+                if (!possiblecomprehension) {
+                    throwError({}, Messages.ComprehensionError);
+                }
+                matchKeyword('for');
+                tmp = parseForStatement({ignoreBody: true});
+                tmp.of = tmp.type === Syntax.ForOfStatement;
+                tmp.type = Syntax.ComprehensionBlock;
+                if (tmp.left.kind) { // can't be let or const
+                    throwError({}, Messages.ComprehensionError);
+                }
+                blocks.push(tmp);
+            } else if (lookahead.value === 'if' &&
+                           lookahead.type === Token.Keyword) {
+                if (!possiblecomprehension) {
+                    throwError({}, Messages.ComprehensionError);
+                }
+                expectKeyword('if');
+                expect('(');
+                filter = parseExpression();
+                expect(')');
+            } else if (lookahead.value === ',' &&
+                           lookahead.type === Token.Punctuator) {
+                possiblecomprehension = false; // no longer allowed.
+                lex();
+                elements.push(null);
+            } else {
+                tmp = parseSpreadOrAssignmentExpression();
+                elements.push(tmp);
+                if (tmp && tmp.type === Syntax.SpreadElement) {
+                    if (!match(']')) {
+                        throwError({}, Messages.ElementAfterSpreadElement);
+                    }
+                } else if (!(match(']') || matchKeyword('for') || matchKeyword('if'))) {
+                    expect(','); // this lexes.
+                    possiblecomprehension = false;
+                }
+            }
+        }
+
+        expect(']');
+
+        if (filter && !blocks.length) {
+            throwError({}, Messages.ComprehensionRequiresBlock);
+        }
+
+        if (blocks.length) {
+            if (elements.length !== 1) {
+                throwError({}, Messages.ComprehensionError);
+            }
+            return markerApply(marker, delegate.createComprehensionExpression(filter, blocks, elements[0]));
+        }
+        return markerApply(marker, delegate.createArrayExpression(elements));
+    }
+
+    // 11.1.5 Object Initialiser
+
+    function parsePropertyFunction(options) {
+        var previousStrict, previousYieldAllowed, params, defaults, body,
+            marker = markerCreate();
+
+        previousStrict = strict;
+        previousYieldAllowed = state.yieldAllowed;
+        state.yieldAllowed = options.generator;
+        params = options.params || [];
+        defaults = options.defaults || [];
+
+        body = parseConciseBody();
+        if (options.name && strict && isRestrictedWord(params[0].name)) {
+            throwErrorTolerant(options.name, Messages.StrictParamName);
+        }
+        strict = previousStrict;
+        state.yieldAllowed = previousYieldAllowed;
+
+        return markerApply(marker, delegate.createFunctionExpression(
+            null,
+            params,
+            defaults,
+            body,
+            options.rest || null,
+            options.generator,
+            body.type !== Syntax.BlockStatement,
+            options.returnType,
+            options.parametricType
+        ));
+    }
+
+
+    function parsePropertyMethodFunction(options) {
+        var previousStrict, tmp, method;
+
+        previousStrict = strict;
+        strict = true;
+
+        tmp = parseParams();
+
+        if (tmp.stricted) {
+            throwErrorTolerant(tmp.stricted, tmp.message);
+        }
+
+
+        method = parsePropertyFunction({
+            params: tmp.params,
+            defaults: tmp.defaults,
+            rest: tmp.rest,
+            generator: options.generator,
+            returnType: tmp.returnType,
+            parametricType: options.parametricType
+        });
+
+        strict = previousStrict;
+
+        return method;
+    }
+
+
+    function parseObjectPropertyKey() {
+        var marker = markerCreate(),
+            token = lex(),
+            propertyKey,
+            result;
+
+        // Note: This function is called only from parseObjectProperty(), where
+        // EOF and Punctuator tokens are already filtered out.
+
+        if (token.type === Token.StringLiteral || token.type === Token.NumericLiteral) {
+            if (strict && token.octal) {
+                throwErrorTolerant(token, Messages.StrictOctalLiteral);
+            }
+            return markerApply(marker, delegate.createLiteral(token));
+        }
+
+        if (token.type === Token.Punctuator && token.value === '[') {
+            // For computed properties we should skip the [ and ], and
+            // capture in marker only the assignment expression itself.
+            marker = markerCreate();
+            propertyKey = parseAssignmentExpression();
+            result = markerApply(marker, propertyKey);
+            expect(']');
+            return result;
+        }
+
+        return markerApply(marker, delegate.createIdentifier(token.value));
+    }
+
+    function parseObjectProperty() {
+        var token, key, id, value, param, expr, computed,
+            marker = markerCreate();
+
+        token = lookahead;
+        computed = (token.value === '[');
+
+        if (token.type === Token.Identifier || computed) {
+
+            id = parseObjectPropertyKey();
+
+            // Property Assignment: Getter and Setter.
+
+            if (token.value === 'get' && !(match(':') || match('('))) {
+                computed = (lookahead.value === '[');
+                key = parseObjectPropertyKey();
+                expect('(');
+                expect(')');
+                return markerApply(marker, delegate.createProperty('get', key, parsePropertyFunction({ generator: false }), false, false, computed));
+            }
+            if (token.value === 'set' && !(match(':') || match('('))) {
+                computed = (lookahead.value === '[');
+                key = parseObjectPropertyKey();
+                expect('(');
+                token = lookahead;
+                param = [ parseTypeAnnotatableIdentifier() ];
+                expect(')');
+                return markerApply(marker, delegate.createProperty('set', key, parsePropertyFunction({ params: param, generator: false, name: token }), false, false, computed));
+            }
+            if (match(':')) {
+                lex();
+                return markerApply(marker, delegate.createProperty('init', id, parseAssignmentExpression(), false, false, computed));
+            }
+            if (match('(')) {
+                return markerApply(marker, delegate.createProperty('init', id, parsePropertyMethodFunction({ generator: false }), true, false, computed));
+            }
+            if (computed) {
+                // Computed properties can only be used with full notation.
+                throwUnexpected(lookahead);
+            }
+            return markerApply(marker, delegate.createProperty('init', id, id, false, true, false));
+        }
+        if (token.type === Token.EOF || token.type === Token.Punctuator) {
+            if (!match('*')) {
+                throwUnexpected(token);
+            }
+            lex();
+
+            computed = (lookahead.type === Token.Punctuator && lookahead.value === '[');
+
+            id = parseObjectPropertyKey();
+
+            if (!match('(')) {
+                throwUnexpected(lex());
+            }
+
+            return markerApply(marker, delegate.createProperty('init', id, parsePropertyMethodFunction({ generator: true }), true, false, computed));
+        }
+        key = parseObjectPropertyKey();
+        if (match(':')) {
+            lex();
+            return markerApply(marker, delegate.createProperty('init', key, parseAssignmentExpression(), false, false, false));
+        }
+        if (match('(')) {
+            return markerApply(marker, delegate.createProperty('init', key, parsePropertyMethodFunction({ generator: false }), true, false, false));
+        }
+        throwUnexpected(lex());
+    }
+
+    function parseObjectSpreadProperty() {
+        var marker = markerCreate();
+        expect('...');
+        return markerApply(marker, delegate.createSpreadProperty(parseAssignmentExpression()));
+    }
+
+    function parseObjectInitialiser() {
+        var properties = [], property, name, key, kind, map = {}, toString = String,
+            marker = markerCreate();
+
+        expect('{');
+
+        while (!match('}')) {
+            if (match('...')) {
+                property = parseObjectSpreadProperty();
+            } else {
+                property = parseObjectProperty();
+
+                if (property.key.type === Syntax.Identifier) {
+                    name = property.key.name;
+                } else {
+                    name = toString(property.key.value);
+                }
+                kind = (property.kind === 'init') ? PropertyKind.Data : (property.kind === 'get') ? PropertyKind.Get : PropertyKind.Set;
+
+                key = '$' + name;
+                if (Object.prototype.hasOwnProperty.call(map, key)) {
+                    if (map[key] === PropertyKind.Data) {
+                        if (strict && kind === PropertyKind.Data) {
+                            throwErrorTolerant({}, Messages.StrictDuplicateProperty);
+                        } else if (kind !== PropertyKind.Data) {
+                            throwErrorTolerant({}, Messages.AccessorDataProperty);
+                        }
+                    } else {
+                        if (kind === PropertyKind.Data) {
+                            throwErrorTolerant({}, Messages.AccessorDataProperty);
+                        } else if (map[key] & kind) {
+                            throwErrorTolerant({}, Messages.AccessorGetSet);
+                        }
+                    }
+                    map[key] |= kind;
+                } else {
+                    map[key] = kind;
+                }
+            }
+
+            properties.push(property);
+
+            if (!match('}')) {
+                expect(',');
+            }
+        }
+
+        expect('}');
+
+        return markerApply(marker, delegate.createObjectExpression(properties));
+    }
+
+    function parseTemplateElement(option) {
+        var marker = markerCreate(),
+            token = scanTemplateElement(option);
+        if (strict && token.octal) {
+            throwError(token, Messages.StrictOctalLiteral);
+        }
+        return markerApply(marker, delegate.createTemplateElement({ raw: token.value.raw, cooked: token.value.cooked }, token.tail));
+    }
+
+    function parseTemplateLiteral() {
+        var quasi, quasis, expressions, marker = markerCreate();
+
+        quasi = parseTemplateElement({ head: true });
+        quasis = [ quasi ];
+        expressions = [];
+
+        while (!quasi.tail) {
+            expressions.push(parseExpression());
+            quasi = parseTemplateElement({ head: false });
+            quasis.push(quasi);
+        }
+
+        return markerApply(marker, delegate.createTemplateLiteral(quasis, expressions));
+    }
+
+    // 11.1.6 The Grouping Operator
+
+    function parseGroupExpression() {
+        var expr;
+
+        expect('(');
+
+        ++state.parenthesizedCount;
+
+        expr = parseExpression();
+
+        expect(')');
+
+        return expr;
+    }
+
+
+    // 11.1 Primary Expressions
+
+    function parsePrimaryExpression() {
+        var marker, type, token, expr;
+
+        type = lookahead.type;
+
+        if (type === Token.Identifier) {
+            marker = markerCreate();
+            return markerApply(marker, delegate.createIdentifier(lex().value));
+        }
+
+        if (type === Token.StringLiteral || type === Token.NumericLiteral) {
+            if (strict && lookahead.octal) {
+                throwErrorTolerant(lookahead, Messages.StrictOctalLiteral);
+            }
+            marker = markerCreate();
+            return markerApply(marker, delegate.createLiteral(lex()));
+        }
+
+        if (type === Token.Keyword) {
+            if (matchKeyword('this')) {
+                marker = markerCreate();
+                lex();
+                return markerApply(marker, delegate.createThisExpression());
+            }
+
+            if (matchKeyword('function')) {
+                return parseFunctionExpression();
+            }
+
+            if (matchKeyword('class')) {
+                return parseClassExpression();
+            }
+
+            if (matchKeyword('super')) {
+                marker = markerCreate();
+                lex();
+                return markerApply(marker, delegate.createIdentifier('super'));
+            }
+        }
+
+        if (type === Token.BooleanLiteral) {
+            marker = markerCreate();
+            token = lex();
+            token.value = (token.value === 'true');
+            return markerApply(marker, delegate.createLiteral(token));
+        }
+
+        if (type === Token.NullLiteral) {
+            marker = markerCreate();
+            token = lex();
+            token.value = null;
+            return markerApply(marker, delegate.createLiteral(token));
+        }
+
+        if (match('[')) {
+            return parseArrayInitialiser();
+        }
+
+        if (match('{')) {
+            return parseObjectInitialiser();
+        }
+
+        if (match('(')) {
+            return parseGroupExpression();
+        }
+
+        if (match('/') || match('/=')) {
+            marker = markerCreate();
+            return markerApply(marker, delegate.createLiteral(scanRegExp()));
+        }
+
+        if (type === Token.Template) {
+            return parseTemplateLiteral();
+        }
+
+        if (match('<')) {
+            return parseXJSElement();
+        }
+
+        throwUnexpected(lex());
+    }
+
+    // 11.2 Left-Hand-Side Expressions
+
+    function parseArguments() {
+        var args = [], arg;
+
+        expect('(');
+
+        if (!match(')')) {
+            while (index < length) {
+                arg = parseSpreadOrAssignmentExpression();
+                args.push(arg);
+
+                if (match(')')) {
+                    break;
+                } else if (arg.type === Syntax.SpreadElement) {
+                    throwError({}, Messages.ElementAfterSpreadElement);
+                }
+
+                expect(',');
+            }
+        }
+
+        expect(')');
+
+        return args;
+    }
+
+    function parseSpreadOrAssignmentExpression() {
+        if (match('...')) {
+            var marker = markerCreate();
+            lex();
+            return markerApply(marker, delegate.createSpreadElement(parseAssignmentExpression()));
+        }
+        return parseAssignmentExpression();
+    }
+
+    function parseNonComputedProperty() {
+        var marker = markerCreate(),
+            token = lex();
+
+        if (!isIdentifierName(token)) {
+            throwUnexpected(token);
+        }
+
+        return markerApply(marker, delegate.createIdentifier(token.value));
+    }
+
+    function parseNonComputedMember() {
+        expect('.');
+
+        return parseNonComputedProperty();
+    }
+
+    function parseComputedMember() {
+        var expr;
+
+        expect('[');
+
+        expr = parseExpression();
+
+        expect(']');
+
+        return expr;
+    }
+
+    function parseNewExpression() {
+        var callee, args, marker = markerCreate();
+
+        expectKeyword('new');
+        callee = parseLeftHandSideExpression();
+        args = match('(') ? parseArguments() : [];
+
+        return markerApply(marker, delegate.createNewExpression(callee, args));
+    }
+
+    function parseLeftHandSideExpressionAllowCall() {
+        var expr, args, marker = markerCreate();
+
+        expr = matchKeyword('new') ? parseNewExpression() : parsePrimaryExpression();
+
+        while (match('.') || match('[') || match('(') || lookahead.type === Token.Template) {
+            if (match('(')) {
+                args = parseArguments();
+                expr = markerApply(marker, delegate.createCallExpression(expr, args));
+            } else if (match('[')) {
+                expr = markerApply(marker, delegate.createMemberExpression('[', expr, parseComputedMember()));
+            } else if (match('.')) {
+                expr = markerApply(marker, delegate.createMemberExpression('.', expr, parseNonComputedMember()));
+            } else {
+                expr = markerApply(marker, delegate.createTaggedTemplateExpression(expr, parseTemplateLiteral()));
+            }
+        }
+
+        return expr;
+    }
+
+    function parseLeftHandSideExpression() {
+        var expr, marker = markerCreate();
+
+        expr = matchKeyword('new') ? parseNewExpression() : parsePrimaryExpression();
+
+        while (match('.') || match('[') || lookahead.type === Token.Template) {
+            if (match('[')) {
+                expr = markerApply(marker, delegate.createMemberExpression('[', expr, parseComputedMember()));
+            } else if (match('.')) {
+                expr = markerApply(marker, delegate.createMemberExpression('.', expr, parseNonComputedMember()));
+            } else {
+                expr = markerApply(marker, delegate.createTaggedTemplateExpression(expr, parseTemplateLiteral()));
+            }
+        }
+
+        return expr;
+    }
+
+    // 11.3 Postfix Expressions
+
+    function parsePostfixExpression() {
+        var marker = markerCreate(),
+            expr = parseLeftHandSideExpressionAllowCall(),
+            token;
+
+        if (lookahead.type !== Token.Punctuator) {
+            return expr;
+        }
+
+        if ((match('++') || match('--')) && !peekLineTerminator()) {
+            // 11.3.1, 11.3.2
+            if (strict && expr.type === Syntax.Identifier && isRestrictedWord(expr.name)) {
+                throwErrorTolerant({}, Messages.StrictLHSPostfix);
+            }
+
+            if (!isLeftHandSide(expr)) {
+                throwError({}, Messages.InvalidLHSInAssignment);
+            }
+
+            token = lex();
+            expr = markerApply(marker, delegate.createPostfixExpression(token.value, expr));
+        }
+
+        return expr;
+    }
+
+    // 11.4 Unary Operators
+
+    function parseUnaryExpression() {
+        var marker, token, expr;
+
+        if (lookahead.type !== Token.Punctuator && lookahead.type !== Token.Keyword) {
+            return parsePostfixExpression();
+        }
+
+        if (match('++') || match('--')) {
+            marker = markerCreate();
+            token = lex();
+            expr = parseUnaryExpression();
+            // 11.4.4, 11.4.5
+            if (strict && expr.type === Syntax.Identifier && isRestrictedWord(expr.name)) {
+                throwErrorTolerant({}, Messages.StrictLHSPrefix);
+            }
+
+            if (!isLeftHandSide(expr)) {
+                throwError({}, Messages.InvalidLHSInAssignment);
+            }
+
+            return markerApply(marker, delegate.createUnaryExpression(token.value, expr));
+        }
+
+        if (match('+') || match('-') || match('~') || match('!')) {
+            marker = markerCreate();
+            token = lex();
+            expr = parseUnaryExpression();
+            return markerApply(marker, delegate.createUnaryExpression(token.value, expr));
+        }
+
+        if (matchKeyword('delete') || matchKeyword('void') || matchKeyword('typeof')) {
+            marker = markerCreate();
+            token = lex();
+            expr = parseUnaryExpression();
+            expr = markerApply(marker, delegate.createUnaryExpression(token.value, expr));
+            if (strict && expr.operator === 'delete' && expr.argument.type === Syntax.Identifier) {
+                throwErrorTolerant({}, Messages.StrictDelete);
+            }
+            return expr;
+        }
+
+        return parsePostfixExpression();
+    }
+
+    function binaryPrecedence(token, allowIn) {
+        var prec = 0;
+
+        if (token.type !== Token.Punctuator && token.type !== Token.Keyword) {
+            return 0;
+        }
+
+        switch (token.value) {
+        case '||':
+            prec = 1;
+            break;
+
+        case '&&':
+            prec = 2;
+            break;
+
+        case '|':
+            prec = 3;
+            break;
+
+        case '^':
+            prec = 4;
+            break;
+
+        case '&':
+            prec = 5;
+            break;
+
+        case '==':
+        case '!=':
+        case '===':
+        case '!==':
+            prec = 6;
+            break;
+
+        case '<':
+        case '>':
+        case '<=':
+        case '>=':
+        case 'instanceof':
+            prec = 7;
+            break;
+
+        case 'in':
+            prec = allowIn ? 7 : 0;
+            break;
+
+        case '<<':
+        case '>>':
+        case '>>>':
+            prec = 8;
+            break;
+
+        case '+':
+        case '-':
+            prec = 9;
+            break;
+
+        case '*':
+        case '/':
+        case '%':
+            prec = 11;
+            break;
+
+        default:
+            break;
+        }
+
+        return prec;
+    }
+
+    // 11.5 Multiplicative Operators
+    // 11.6 Additive Operators
+    // 11.7 Bitwise Shift Operators
+    // 11.8 Relational Operators
+    // 11.9 Equality Operators
+    // 11.10 Binary Bitwise Operators
+    // 11.11 Binary Logical Operators
+
+    function parseBinaryExpression() {
+        var expr, token, prec, previousAllowIn, stack, right, operator, left, i,
+            marker, markers;
+
+        previousAllowIn = state.allowIn;
+        state.allowIn = true;
+
+        marker = markerCreate();
+        left = parseUnaryExpression();
+
+        token = lookahead;
+        prec = binaryPrecedence(token, previousAllowIn);
+        if (prec === 0) {
+            return left;
+        }
+        token.prec = prec;
+        lex();
+
+        markers = [marker, markerCreate()];
+        right = parseUnaryExpression();
+
+        stack = [left, token, right];
+
+        while ((prec = binaryPrecedence(lookahead, previousAllowIn)) > 0) {
+
+            // Reduce: make a binary expression from the three topmost entries.
+            while ((stack.length > 2) && (prec <= stack[stack.length - 2].prec)) {
+                right = stack.pop();
+                operator = stack.pop().value;
+                left = stack.pop();
+                expr = delegate.createBinaryExpression(operator, left, right);
+                markers.pop();
+                marker = markers.pop();
+                markerApply(marker, expr);
+                stack.push(expr);
+                markers.push(marker);
+            }
+
+            // Shift.
+            token = lex();
+            token.prec = prec;
+            stack.push(token);
+            markers.push(markerCreate());
+            expr = parseUnaryExpression();
+            stack.push(expr);
+        }
+
+        state.allowIn = previousAllowIn;
+
+        // Final reduce to clean-up the stack.
+        i = stack.length - 1;
+        expr = stack[i];
+        markers.pop();
+        while (i > 1) {
+            expr = delegate.createBinaryExpression(stack[i - 1].value, stack[i - 2], expr);
+            i -= 2;
+            marker = markers.pop();
+            markerApply(marker, expr);
+        }
+
+        return expr;
+    }
+
+
+    // 11.12 Conditional Operator
+
+    function parseConditionalExpression() {
+        var expr, previousAllowIn, consequent, alternate, marker = markerCreate();
+        expr = parseBinaryExpression();
+
+        if (match('?')) {
+            lex();
+            previousAllowIn = state.allowIn;
+            state.allowIn = true;
+            consequent = parseAssignmentExpression();
+            state.allowIn = previousAllowIn;
+            expect(':');
+            alternate = parseAssignmentExpression();
+
+            expr = markerApply(marker, delegate.createConditionalExpression(expr, consequent, alternate));
+        }
+
+        return expr;
+    }
+
+    // 11.13 Assignment Operators
+
+    function reinterpretAsAssignmentBindingPattern(expr) {
+        var i, len, property, element;
+
+        if (expr.type === Syntax.ObjectExpression) {
+            expr.type = Syntax.ObjectPattern;
+            for (i = 0, len = expr.properties.length; i < len; i += 1) {
+                property = expr.properties[i];
+                if (property.type === Syntax.SpreadProperty) {
+                    if (i < len - 1) {
+                        throwError({}, Messages.PropertyAfterSpreadProperty);
+                    }
+                    reinterpretAsAssignmentBindingPattern(property.argument);
+                } else {
+                    if (property.kind !== 'init') {
+                        throwError({}, Messages.InvalidLHSInAssignment);
+                    }
+                    reinterpretAsAssignmentBindingPattern(property.value);
+                }
+            }
+        } else if (expr.type === Syntax.ArrayExpression) {
+            expr.type = Syntax.ArrayPattern;
+            for (i = 0, len = expr.elements.length; i < len; i += 1) {
+                element = expr.elements[i];
+                if (element) {
+                    reinterpretAsAssignmentBindingPattern(element);
+                }
+            }
+        } else if (expr.type === Syntax.Identifier) {
+            if (isRestrictedWord(expr.name)) {
+                throwError({}, Messages.InvalidLHSInAssignment);
+            }
+        } else if (expr.type === Syntax.SpreadElement) {
+            reinterpretAsAssignmentBindingPattern(expr.argument);
+            if (expr.argument.type === Syntax.ObjectPattern) {
+                throwError({}, Messages.ObjectPatternAsSpread);
+            }
+        } else {
+            if (expr.type !== Syntax.MemberExpression && expr.type !== Syntax.CallExpression && expr.type !== Syntax.NewExpression) {
+                throwError({}, Messages.InvalidLHSInAssignment);
+            }
+        }
+    }
+
+
+    function reinterpretAsDestructuredParameter(options, expr) {
+        var i, len, property, element;
+
+        if (expr.type === Syntax.ObjectExpression) {
+            expr.type = Syntax.ObjectPattern;
+            for (i = 0, len = expr.properties.length; i < len; i += 1) {
+                property = expr.properties[i];
+                if (property.type === Syntax.SpreadProperty) {
+                    if (i < len - 1) {
+                        throwError({}, Messages.PropertyAfterSpreadProperty);
+                    }
+                    reinterpretAsDestructuredParameter(options, property.argument);
+                } else {
+                    if (property.kind !== 'init') {
+                        throwError({}, Messages.InvalidLHSInFormalsList);
+                    }
+                    reinterpretAsDestructuredParameter(options, property.value);
+                }
+            }
+        } else if (expr.type === Syntax.ArrayExpression) {
+            expr.type = Syntax.ArrayPattern;
+            for (i = 0, len = expr.elements.length; i < len; i += 1) {
+                element = expr.elements[i];
+                if (element) {
+                    reinterpretAsDestructuredParameter(options, element);
+                }
+            }
+        } else if (expr.type === Syntax.Identifier) {
+            validateParam(options, expr, expr.name);
+        } else {
+            if (expr.type !== Syntax.MemberExpression) {
+                throwError({}, Messages.InvalidLHSInFormalsList);
+            }
+        }
+    }
+
+    function reinterpretAsCoverFormalsList(expressions) {
+        var i, len, param, params, defaults, defaultCount, options, rest;
+
+        params = [];
+        defaults = [];
+        defaultCount = 0;
+        rest = null;
+        options = {
+            paramSet: {}
+        };
+
+        for (i = 0, len = expressions.length; i < len; i += 1) {
+            param = expressions[i];
+            if (param.type === Syntax.Identifier) {
+                params.push(param);
+                defaults.push(null);
+                validateParam(options, param, param.name);
+            } else if (param.type === Syntax.ObjectExpression || param.type === Syntax.ArrayExpression) {
+                reinterpretAsDestructuredParameter(options, param);
+                params.push(param);
+                defaults.push(null);
+            } else if (param.type === Syntax.SpreadElement) {
+                assert(i === len - 1, 'It is guaranteed that SpreadElement is last element by parseExpression');
+                reinterpretAsDestructuredParameter(options, param.argument);
+                rest = param.argument;
+            } else if (param.type === Syntax.AssignmentExpression) {
+                params.push(param.left);
+                defaults.push(param.right);
+                ++defaultCount;
+                validateParam(options, param.left, param.left.name);
+            } else {
+                return null;
+            }
+        }
+
+        if (options.message === Messages.StrictParamDupe) {
+            throwError(
+                strict ? options.stricted : options.firstRestricted,
+                options.message
+            );
+        }
+
+        if (defaultCount === 0) {
+            defaults = [];
+        }
+
+        return {
+            params: params,
+            defaults: defaults,
+            rest: rest,
+            stricted: options.stricted,
+            firstRestricted: options.firstRestricted,
+            message: options.message
+        };
+    }
+
+    function parseArrowFunctionExpression(options, marker) {
+        var previousStrict, previousYieldAllowed, body;
+
+        expect('=>');
+
+        previousStrict = strict;
+        previousYieldAllowed = state.yieldAllowed;
+        state.yieldAllowed = false;
+        body = parseConciseBody();
+
+        if (strict && options.firstRestricted) {
+            throwError(options.firstRestricted, options.message);
+        }
+        if (strict && options.stricted) {
+            throwErrorTolerant(options.stricted, options.message);
+        }
+
+        strict = previousStrict;
+        state.yieldAllowed = previousYieldAllowed;
+
+        return markerApply(marker, delegate.createArrowFunctionExpression(
+            options.params,
+            options.defaults,
+            body,
+            options.rest,
+            body.type !== Syntax.BlockStatement
+        ));
+    }
+
+    function parseAssignmentExpression() {
+        var marker, expr, token, params, oldParenthesizedCount;
+
+        // Note that 'yield' is treated as a keyword in strict mode, but a
+        // contextual keyword (identifier) in non-strict mode, so we need
+        // to use matchKeyword and matchContextualKeyword appropriately.
+        if ((state.yieldAllowed && matchContextualKeyword('yield')) || (strict && matchKeyword('yield'))) {
+            return parseYieldExpression();
+        }
+
+        oldParenthesizedCount = state.parenthesizedCount;
+
+        marker = markerCreate();
+
+        if (match('(')) {
+            token = lookahead2();
+            if ((token.type === Token.Punctuator && token.value === ')') || token.value === '...') {
+                params = parseParams();
+                if (!match('=>')) {
+                    throwUnexpected(lex());
+                }
+                return parseArrowFunctionExpression(params, marker);
+            }
+        }
+
+        token = lookahead;
+        expr = parseConditionalExpression();
+
+        if (match('=>') &&
+                (state.parenthesizedCount === oldParenthesizedCount ||
+                state.parenthesizedCount === (oldParenthesizedCount + 1))) {
+            if (expr.type === Syntax.Identifier) {
+                params = reinterpretAsCoverFormalsList([ expr ]);
+            } else if (expr.type === Syntax.SequenceExpression) {
+                params = reinterpretAsCoverFormalsList(expr.expressions);
+            }
+            if (params) {
+                return parseArrowFunctionExpression(params, marker);
+            }
+        }
+
+        if (matchAssign()) {
+            // 11.13.1
+            if (strict && expr.type === Syntax.Identifier && isRestrictedWord(expr.name)) {
+                throwErrorTolerant(token, Messages.StrictLHSAssignment);
+            }
+
+            // ES.next draf 11.13 Runtime Semantics step 1
+            if (match('=') && (expr.type === Syntax.ObjectExpression || expr.type === Syntax.ArrayExpression)) {
+                reinterpretAsAssignmentBindingPattern(expr);
+            } else if (!isLeftHandSide(expr)) {
+                throwError({}, Messages.InvalidLHSInAssignment);
+            }
+
+            expr = markerApply(marker, delegate.createAssignmentExpression(lex().value, expr, parseAssignmentExpression()));
+        }
+
+        return expr;
+    }
+
+    // 11.14 Comma Operator
+
+    function parseExpression() {
+        var marker, expr, expressions, sequence, coverFormalsList, spreadFound, oldParenthesizedCount;
+
+        oldParenthesizedCount = state.parenthesizedCount;
+
+        marker = markerCreate();
+        expr = parseAssignmentExpression();
+        expressions = [ expr ];
+
+        if (match(',')) {
+            while (index < length) {
+                if (!match(',')) {
+                    break;
+                }
+
+                lex();
+                expr = parseSpreadOrAssignmentExpression();
+                expressions.push(expr);
+
+                if (expr.type === Syntax.SpreadElement) {
+                    spreadFound = true;
+                    if (!match(')')) {
+                        throwError({}, Messages.ElementAfterSpreadElement);
+                    }
+                    break;
+                }
+            }
+
+            sequence = markerApply(marker, delegate.createSequenceExpression(expressions));
+        }
+
+        if (match('=>')) {
+            // Do not allow nested parentheses on the LHS of the =>.
+            if (state.parenthesizedCount === oldParenthesizedCount || state.parenthesizedCount === (oldParenthesizedCount + 1)) {
+                expr = expr.type === Syntax.SequenceExpression ? expr.expressions : expressions;
+                coverFormalsList = reinterpretAsCoverFormalsList(expr);
+                if (coverFormalsList) {
+                    return parseArrowFunctionExpression(coverFormalsList, marker);
+                }
+            }
+            throwUnexpected(lex());
+        }
+
+        if (spreadFound && lookahead2().value !== '=>') {
+            throwError({}, Messages.IllegalSpread);
+        }
+
+        return sequence || expr;
+    }
+
+    // 12.1 Block
+
+    function parseStatementList() {
+        var list = [],
+            statement;
+
+        while (index < length) {
+            if (match('}')) {
+                break;
+            }
+            statement = parseSourceElement();
+            if (typeof statement === 'undefined') {
+                break;
+            }
+            list.push(statement);
+        }
+
+        return list;
+    }
+
+    function parseBlock() {
+        var block, marker = markerCreate();
+
+        expect('{');
+
+        block = parseStatementList();
+
+        expect('}');
+
+        return markerApply(marker, delegate.createBlockStatement(block));
+    }
+
+    // 12.2 Variable Statement
+
+    function parseObjectTypeAnnotation() {
+        var isMethod, marker, properties = [], property, propertyKey,
+            propertyTypeAnnotation;
+
+        expect('{');
+
+        while (!match('}')) {
+            marker = markerCreate();
+            propertyKey = parseObjectPropertyKey();
+            isMethod = match('(');
+            propertyTypeAnnotation = parseTypeAnnotation();
+            properties.push(markerApply(marker, delegate.createProperty(
+                'init',
+                propertyKey,
+                propertyTypeAnnotation,
+                isMethod,
+                false
+            )));
+
+            if (!match('}')) {
+                if (match(',') || match(';')) {
+                    lex();
+                } else {
+                    throwUnexpected(lookahead);
+                }
+            }
+        }
+
+        expect('}');
+
+        return delegate.createObjectTypeAnnotation(properties);
+    }
+
+    function parseVoidTypeAnnotation() {
+        var marker = markerCreate();
+        expectKeyword('void');
+        return markerApply(marker, delegate.createVoidTypeAnnotation());
+    }
+
+    function parseParametricTypeAnnotation() {
+        var marker = markerCreate(), typeIdentifier, paramTypes = [];
+
+        expect('<');
+        while (!match('>')) {
+            paramTypes.push(parseVariableIdentifier());
+            if (!match('>')) {
+                expect(',');
+            }
+        }
+        expect('>');
+
+        return markerApply(marker, delegate.createParametricTypeAnnotation(
+            paramTypes
+        ));
+    }
+
+    function parseTypeAnnotation(dontExpectColon) {
+        var typeIdentifier = null, params = null, returnType = null,
+            nullable = false, marker = markerCreate(), returnTypeMarker = null,
+            parametricType, annotation;
+
+        if (!dontExpectColon) {
+            expect(':');
+        }
+
+        if (match('{')) {
+            return markerApply(marker, parseObjectTypeAnnotation());
+        }
+
+        if (match('?')) {
+            lex();
+            nullable = true;
+        }
+
+        if (lookahead.type === Token.Identifier) {
+            typeIdentifier = parseVariableIdentifier();
+            if (match('<')) {
+                parametricType = parseParametricTypeAnnotation();
+            }
+        } else if (match('(')) {
+            lex();
+            params = [];
+            while (lookahead.type === Token.Identifier || match('?')) {
+                params.push(parseTypeAnnotatableIdentifier(
+                    true, /* requireTypeAnnotation */
+                    true /* canBeOptionalParam */
+                ));
+                if (!match(')')) {
+                    expect(',');
+                }
+            }
+            expect(')');
+
+            returnTypeMarker = markerCreate();
+            expect('=>');
+
+            returnType = parseTypeAnnotation(true);
+        } else {
+            if (!matchKeyword('void')) {
+                throwUnexpected(lookahead);
+            } else {
+                return parseVoidTypeAnnotation();
+            }
+        }
+
+        return markerApply(marker, delegate.createTypeAnnotation(
+            typeIdentifier,
+            parametricType,
+            params,
+            returnType,
+            nullable
+        ));
+    }
+
+    function parseVariableIdentifier() {
+        var marker = markerCreate(),
+            token = lex();
+
+        if (token.type !== Token.Identifier) {
+            throwUnexpected(token);
+        }
+
+        return markerApply(marker, delegate.createIdentifier(token.value));
+    }
+
+    function parseTypeAnnotatableIdentifier(requireTypeAnnotation, canBeOptionalParam) {
+        var marker = markerCreate(),
+            ident = parseVariableIdentifier(),
+            isOptionalParam = false;
+
+        if (canBeOptionalParam && match('?')) {
+            expect('?');
+            isOptionalParam = true;
+        }
+
+        if (requireTypeAnnotation || match(':')) {
+            ident = markerApply(marker, delegate.createTypeAnnotatedIdentifier(
+                ident,
+                parseTypeAnnotation()
+            ));
+        }
+
+        if (isOptionalParam) {
+            ident = markerApply(marker, delegate.createOptionalParameter(ident));
+        }
+
+        return ident;
+    }
+
+    function parseVariableDeclaration(kind) {
+        var id,
+            marker = markerCreate(),
+            init = null;
+        if (match('{')) {
+            id = parseObjectInitialiser();
+            reinterpretAsAssignmentBindingPattern(id);
+        } else if (match('[')) {
+            id = parseArrayInitialiser();
+            reinterpretAsAssignmentBindingPattern(id);
+        } else {
+            id = state.allowKeyword ? parseNonComputedProperty() : parseTypeAnnotatableIdentifier();
+            // 12.2.1
+            if (strict && isRestrictedWord(id.name)) {
+                throwErrorTolerant({}, Messages.StrictVarName);
+            }
+        }
+
+        if (kind === 'const') {
+            if (!match('=')) {
+                throwError({}, Messages.NoUnintializedConst);
+            }
+            expect('=');
+            init = parseAssignmentExpression();
+        } else if (match('=')) {
+            lex();
+            init = parseAssignmentExpression();
+        }
+
+        return markerApply(marker, delegate.createVariableDeclarator(id, init));
+    }
+
+    function parseVariableDeclarationList(kind) {
+        var list = [];
+
+        do {
+            list.push(parseVariableDeclaration(kind));
+            if (!match(',')) {
+                break;
+            }
+            lex();
+        } while (index < length);
+
+        return list;
+    }
+
+    function parseVariableStatement() {
+        var declarations, marker = markerCreate();
+
+        expectKeyword('var');
+
+        declarations = parseVariableDeclarationList();
+
+        consumeSemicolon();
+
+        return markerApply(marker, delegate.createVariableDeclaration(declarations, 'var'));
+    }
+
+    // kind may be `const` or `let`
+    // Both are experimental and not in the specification yet.
+    // see http://wiki.ecmascript.org/doku.php?id=harmony:const
+    // and http://wiki.ecmascript.org/doku.php?id=harmony:let
+    function parseConstLetDeclaration(kind) {
+        var declarations, marker = markerCreate();
+
+        expectKeyword(kind);
+
+        declarations = parseVariableDeclarationList(kind);
+
+        consumeSemicolon();
+
+        return markerApply(marker, delegate.createVariableDeclaration(declarations, kind));
+    }
+
+    // http://wiki.ecmascript.org/doku.php?id=harmony:modules
+
+    function parseModuleDeclaration() {
+        var id, src, body, marker = markerCreate();
+
+        lex();   // 'module'
+
+        if (peekLineTerminator()) {
+            throwError({}, Messages.NewlineAfterModule);
+        }
+
+        switch (lookahead.type) {
+
+        case Token.StringLiteral:
+            id = parsePrimaryExpression();
+            body = parseModuleBlock();
+            src = null;
+            break;
+
+        case Token.Identifier:
+            id = parseVariableIdentifier();
+            body = null;
+            if (!matchContextualKeyword('from')) {
+                throwUnexpected(lex());
+            }
+            lex();
+            src = parsePrimaryExpression();
+            if (src.type !== Syntax.Literal) {
+                throwError({}, Messages.InvalidModuleSpecifier);
+            }
+            break;
+        }
+
+        consumeSemicolon();
+        return markerApply(marker, delegate.createModuleDeclaration(id, src, body));
+    }
+
+    function parseExportBatchSpecifier() {
+        var marker = markerCreate();
+        expect('*');
+        return markerApply(marker, delegate.createExportBatchSpecifier());
+    }
+
+    function parseExportSpecifier() {
+        var id, name = null, marker = markerCreate();
+
+        id = parseVariableIdentifier();
+        if (matchContextualKeyword('as')) {
+            lex();
+            name = parseNonComputedProperty();
+        }
+
+        return markerApply(marker, delegate.createExportSpecifier(id, name));
+    }
+
+    function parseExportDeclaration() {
+        var previousAllowKeyword, decl, def, src, specifiers,
+            marker = markerCreate();
+
+        expectKeyword('export');
+
+        if (lookahead.type === Token.Keyword) {
+            switch (lookahead.value) {
+            case 'let':
+            case 'const':
+            case 'var':
+            case 'class':
+            case 'function':
+                return markerApply(marker, delegate.createExportDeclaration(parseSourceElement(), null, null));
+            }
+        }
+
+        if (isIdentifierName(lookahead)) {
+            previousAllowKeyword = state.allowKeyword;
+            state.allowKeyword = true;
+            decl = parseVariableDeclarationList('let');
+            state.allowKeyword = previousAllowKeyword;
+            return markerApply(marker, delegate.createExportDeclaration(decl, null, null));
+        }
+
+        specifiers = [];
+        src = null;
+
+        if (match('*')) {
+            specifiers.push(parseExportBatchSpecifier());
+        } else {
+            expect('{');
+            do {
+                specifiers.push(parseExportSpecifier());
+            } while (match(',') && lex());
+            expect('}');
+        }
+
+        if (matchContextualKeyword('from')) {
+            lex();
+            src = parsePrimaryExpression();
+            if (src.type !== Syntax.Literal) {
+                throwError({}, Messages.InvalidModuleSpecifier);
+            }
+        }
+
+        consumeSemicolon();
+
+        return markerApply(marker, delegate.createExportDeclaration(null, specifiers, src));
+    }
+
+    function parseImportDeclaration() {
+        var specifiers, kind, src, marker = markerCreate();
+
+        expectKeyword('import');
+        specifiers = [];
+
+        if (isIdentifierName(lookahead)) {
+            kind = 'default';
+            specifiers.push(parseImportSpecifier());
+
+            if (!matchContextualKeyword('from')) {
+                throwError({}, Messages.NoFromAfterImport);
+            }
+            lex();
+        } else if (match('{')) {
+            kind = 'named';
+            lex();
+            do {
+                specifiers.push(parseImportSpecifier());
+            } while (match(',') && lex());
+            expect('}');
+
+            if (!matchContextualKeyword('from')) {
+                throwError({}, Messages.NoFromAfterImport);
+            }
+            lex();
+        }
+
+        src = parsePrimaryExpression();
+        if (src.type !== Syntax.Literal) {
+            throwError({}, Messages.InvalidModuleSpecifier);
+        }
+
+        consumeSemicolon();
+
+        return markerApply(marker, delegate.createImportDeclaration(specifiers, kind, src));
+    }
+
+    function parseImportSpecifier() {
+        var id, name = null, marker = markerCreate();
+
+        id = parseNonComputedProperty();
+        if (matchContextualKeyword('as')) {
+            lex();
+            name = parseVariableIdentifier();
+        }
+
+        return markerApply(marker, delegate.createImportSpecifier(id, name));
+    }
+
+    // 12.3 Empty Statement
+
+    function parseEmptyStatement() {
+        var marker = markerCreate();
+        expect(';');
+        return markerApply(marker, delegate.createEmptyStatement());
+    }
+
+    // 12.4 Expression Statement
+
+    function parseExpressionStatement() {
+        var marker = markerCreate(), expr = parseExpression();
+        consumeSemicolon();
+        return markerApply(marker, delegate.createExpressionStatement(expr));
+    }
+
+    // 12.5 If statement
+
+    function parseIfStatement() {
+        var test, consequent, alternate, marker = markerCreate();
+
+        expectKeyword('if');
+
+        expect('(');
+
+        test = parseExpression();
+
+        expect(')');
+
+        consequent = parseStatement();
+
+        if (matchKeyword('else')) {
+            lex();
+            alternate = parseStatement();
+        } else {
+            alternate = null;
+        }
+
+        return markerApply(marker, delegate.createIfStatement(test, consequent, alternate));
+    }
+
+    // 12.6 Iteration Statements
+
+    function parseDoWhileStatement() {
+        var body, test, oldInIteration, marker = markerCreate();
+
+        expectKeyword('do');
+
+        oldInIteration = state.inIteration;
+        state.inIteration = true;
+
+        body = parseStatement();
+
+        state.inIteration = oldInIteration;
+
+        expectKeyword('while');
+
+        expect('(');
+
+        test = parseExpression();
+
+        expect(')');
+
+        if (match(';')) {
+            lex();
+        }
+
+        return markerApply(marker, delegate.createDoWhileStatement(body, test));
+    }
+
+    function parseWhileStatement() {
+        var test, body, oldInIteration, marker = markerCreate();
+
+        expectKeyword('while');
+
+        expect('(');
+
+        test = parseExpression();
+
+        expect(')');
+
+        oldInIteration = state.inIteration;
+        state.inIteration = true;
+
+        body = parseStatement();
+
+        state.inIteration = oldInIteration;
+
+        return markerApply(marker, delegate.createWhileStatement(test, body));
+    }
+
+    function parseForVariableDeclaration() {
+        var marker = markerCreate(),
+            token = lex(),
+            declarations = parseVariableDeclarationList();
+
+        return markerApply(marker, delegate.createVariableDeclaration(declarations, token.value));
+    }
+
+    function parseForStatement(opts) {
+        var init, test, update, left, right, body, operator, oldInIteration,
+            marker = markerCreate();
+        init = test = update = null;
+        expectKeyword('for');
+
+        // http://wiki.ecmascript.org/doku.php?id=proposals:iterators_and_generators&s=each
+        if (matchContextualKeyword('each')) {
+            throwError({}, Messages.EachNotAllowed);
+        }
+
+        expect('(');
+
+        if (match(';')) {
+            lex();
+        } else {
+            if (matchKeyword('var') || matchKeyword('let') || matchKeyword('const')) {
+                state.allowIn = false;
+                init = parseForVariableDeclaration();
+                state.allowIn = true;
+
+                if (init.declarations.length === 1) {
+                    if (matchKeyword('in') || matchContextualKeyword('of')) {
+                        operator = lookahead;
+                        if (!((operator.value === 'in' || init.kind !== 'var') && init.declarations[0].init)) {
+                            lex();
+                            left = init;
+                            right = parseExpression();
+                            init = null;
+                        }
+                    }
+                }
+            } else {
+                state.allowIn = false;
+                init = parseExpression();
+                state.allowIn = true;
+
+                if (matchContextualKeyword('of')) {
+                    operator = lex();
+                    left = init;
+                    right = parseExpression();
+                    init = null;
+                } else if (matchKeyword('in')) {
+                    // LeftHandSideExpression
+                    if (!isAssignableLeftHandSide(init)) {
+                        throwError({}, Messages.InvalidLHSInForIn);
+                    }
+                    operator = lex();
+                    left = init;
+                    right = parseExpression();
+                    init = null;
+                }
+            }
+
+            if (typeof left === 'undefined') {
+                expect(';');
+            }
+        }
+
+        if (typeof left === 'undefined') {
+
+            if (!match(';')) {
+                test = parseExpression();
+            }
+            expect(';');
+
+            if (!match(')')) {
+                update = parseExpression();
+            }
+        }
+
+        expect(')');
+
+        oldInIteration = state.inIteration;
+        state.inIteration = true;
+
+        if (!(opts !== undefined && opts.ignoreBody)) {
+            body = parseStatement();
+        }
+
+        state.inIteration = oldInIteration;
+
+        if (typeof left === 'undefined') {
+            return markerApply(marker, delegate.createForStatement(init, test, update, body));
+        }
+
+        if (operator.value === 'in') {
+            return markerApply(marker, delegate.createForInStatement(left, right, body));
+        }
+        return markerApply(marker, delegate.createForOfStatement(left, right, body));
+    }
+
+    // 12.7 The continue statement
+
+    function parseContinueStatement() {
+        var label = null, key, marker = markerCreate();
+
+        expectKeyword('continue');
+
+        // Optimize the most common form: 'continue;'.
+        if (source.charCodeAt(index) === 59) {
+            lex();
+
+            if (!state.inIteration) {
+                throwError({}, Messages.IllegalContinue);
+            }
+
+            return markerApply(marker, delegate.createContinueStatement(null));
+        }
+
+        if (peekLineTerminator()) {
+            if (!state.inIteration) {
+                throwError({}, Messages.IllegalContinue);
+            }
+
+            return markerApply(marker, delegate.createContinueStatement(null));
+        }
+
+        if (lookahead.type === Token.Identifier) {
+            label = parseVariableIdentifier();
+
+            key = '$' + label.name;
+            if (!Object.prototype.hasOwnProperty.call(state.labelSet, key)) {
+                throwError({}, Messages.UnknownLabel, label.name);
+            }
+        }
+
+        consumeSemicolon();
+
+        if (label === null && !state.inIteration) {
+            throwError({}, Messages.IllegalContinue);
+        }
+
+        return markerApply(marker, delegate.createContinueStatement(label));
+    }
+
+    // 12.8 The break statement
+
+    function parseBreakStatement() {
+        var label = null, key, marker = markerCreate();
+
+        expectKeyword('break');
+
+        // Catch the very common case first: immediately a semicolon (char #59).
+        if (source.charCodeAt(index) === 59) {
+            lex();
+
+            if (!(state.inIteration || state.inSwitch)) {
+                throwError({}, Messages.IllegalBreak);
+            }
+
+            return markerApply(marker, delegate.createBreakStatement(null));
+        }
+
+        if (peekLineTerminator()) {
+            if (!(state.inIteration || state.inSwitch)) {
+                throwError({}, Messages.IllegalBreak);
+            }
+
+            return markerApply(marker, delegate.createBreakStatement(null));
+        }
+
+        if (lookahead.type === Token.Identifier) {
+            label = parseVariableIdentifier();
+
+            key = '$' + label.name;
+            if (!Object.prototype.hasOwnProperty.call(state.labelSet, key)) {
+                throwError({}, Messages.UnknownLabel, label.name);
+            }
+        }
+
+        consumeSemicolon();
+
+        if (label === null && !(state.inIteration || state.inSwitch)) {
+            throwError({}, Messages.IllegalBreak);
+        }
+
+        return markerApply(marker, delegate.createBreakStatement(label));
+    }
+
+    // 12.9 The return statement
+
+    function parseReturnStatement() {
+        var argument = null, marker = markerCreate();
+
+        expectKeyword('return');
+
+        if (!state.inFunctionBody) {
+            throwErrorTolerant({}, Messages.IllegalReturn);
+        }
+
+        // 'return' followed by a space and an identifier is very common.
+        if (source.charCodeAt(index) === 32) {
+            if (isIdentifierStart(source.charCodeAt(index + 1))) {
+                argument = parseExpression();
+                consumeSemicolon();
+                return markerApply(marker, delegate.createReturnStatement(argument));
+            }
+        }
+
+        if (peekLineTerminator()) {
+            return markerApply(marker, delegate.createReturnStatement(null));
+        }
+
+        if (!match(';')) {
+            if (!match('}') && lookahead.type !== Token.EOF) {
+                argument = parseExpression();
+            }
+        }
+
+        consumeSemicolon();
+
+        return markerApply(marker, delegate.createReturnStatement(argument));
+    }
+
+    // 12.10 The with statement
+
+    function parseWithStatement() {
+        var object, body, marker = markerCreate();
+
+        if (strict) {
+            throwErrorTolerant({}, Messages.StrictModeWith);
+        }
+
+        expectKeyword('with');
+
+        expect('(');
+
+        object = parseExpression();
+
+        expect(')');
+
+        body = parseStatement();
+
+        return markerApply(marker, delegate.createWithStatement(object, body));
+    }
+
+    // 12.10 The swith statement
+
+    function parseSwitchCase() {
+        var test,
+            consequent = [],
+            sourceElement,
+            marker = markerCreate();
+
+        if (matchKeyword('default')) {
+            lex();
+            test = null;
+        } else {
+            expectKeyword('case');
+            test = parseExpression();
+        }
+        expect(':');
+
+        while (index < length) {
+            if (match('}') || matchKeyword('default') || matchKeyword('case')) {
+                break;
+            }
+            sourceElement = parseSourceElement();
+            if (typeof sourceElement === 'undefined') {
+                break;
+            }
+            consequent.push(sourceElement);
+        }
+
+        return markerApply(marker, delegate.createSwitchCase(test, consequent));
+    }
+
+    function parseSwitchStatement() {
+        var discriminant, cases, clause, oldInSwitch, defaultFound, marker = markerCreate();
+
+        expectKeyword('switch');
+
+        expect('(');
+
+        discriminant = parseExpression();
+
+        expect(')');
+
+        expect('{');
+
+        cases = [];
+
+        if (match('}')) {
+            lex();
+            return markerApply(marker, delegate.createSwitchStatement(discriminant, cases));
+        }
+
+        oldInSwitch = state.inSwitch;
+        state.inSwitch = true;
+        defaultFound = false;
+
+        while (index < length) {
+            if (match('}')) {
+                break;
+            }
+            clause = parseSwitchCase();
+            if (clause.test === null) {
+                if (defaultFound) {
+                    throwError({}, Messages.MultipleDefaultsInSwitch);
+                }
+                defaultFound = true;
+            }
+            cases.push(clause);
+        }
+
+        state.inSwitch = oldInSwitch;
+
+        expect('}');
+
+        return markerApply(marker, delegate.createSwitchStatement(discriminant, cases));
+    }
+
+    // 12.13 The throw statement
+
+    function parseThrowStatement() {
+        var argument, marker = markerCreate();
+
+        expectKeyword('throw');
+
+        if (peekLineTerminator()) {
+            throwError({}, Messages.NewlineAfterThrow);
+        }
+
+        argument = parseExpression();
+
+        consumeSemicolon();
+
+        return markerApply(marker, delegate.createThrowStatement(argument));
+    }
+
+    // 12.14 The try statement
+
+    function parseCatchClause() {
+        var param, body, marker = markerCreate();
+
+        expectKeyword('catch');
+
+        expect('(');
+        if (match(')')) {
+            throwUnexpected(lookahead);
+        }
+
+        param = parseExpression();
+        // 12.14.1
+        if (strict && param.type === Syntax.Identifier && isRestrictedWord(param.name)) {
+            throwErrorTolerant({}, Messages.StrictCatchVariable);
+        }
+
+        expect(')');
+        body = parseBlock();
+        return markerApply(marker, delegate.createCatchClause(param, body));
+    }
+
+    function parseTryStatement() {
+        var block, handlers = [], finalizer = null, marker = markerCreate();
+
+        expectKeyword('try');
+
+        block = parseBlock();
+
+        if (matchKeyword('catch')) {
+            handlers.push(parseCatchClause());
+        }
+
+        if (matchKeyword('finally')) {
+            lex();
+            finalizer = parseBlock();
+        }
+
+        if (handlers.length === 0 && !finalizer) {
+            throwError({}, Messages.NoCatchOrFinally);
+        }
+
+        return markerApply(marker, delegate.createTryStatement(block, [], handlers, finalizer));
+    }
+
+    // 12.15 The debugger statement
+
+    function parseDebuggerStatement() {
+        var marker = markerCreate();
+        expectKeyword('debugger');
+
+        consumeSemicolon();
+
+        return markerApply(marker, delegate.createDebuggerStatement());
+    }
+
+    // 12 Statements
+
+    function parseStatement() {
+        var type = lookahead.type,
+            marker,
+            expr,
+            labeledBody,
+            key;
+
+        if (type === Token.EOF) {
+            throwUnexpected(lookahead);
+        }
+
+        if (type === Token.Punctuator) {
+            switch (lookahead.value) {
+            case ';':
+                return parseEmptyStatement();
+            case '{':
+                return parseBlock();
+            case '(':
+                return parseExpressionStatement();
+            default:
+                break;
+            }
+        }
+
+        if (type === Token.Keyword) {
+            switch (lookahead.value) {
+            case 'break':
+                return parseBreakStatement();
+            case 'continue':
+                return parseContinueStatement();
+            case 'debugger':
+                return parseDebuggerStatement();
+            case 'do':
+                return parseDoWhileStatement();
+            case 'for':
+                return parseForStatement();
+            case 'function':
+                return parseFunctionDeclaration();
+            case 'class':
+                return parseClassDeclaration();
+            case 'if':
+                return parseIfStatement();
+            case 'return':
+                return parseReturnStatement();
+            case 'switch':
+                return parseSwitchStatement();
+            case 'throw':
+                return parseThrowStatement();
+            case 'try':
+                return parseTryStatement();
+            case 'var':
+                return parseVariableStatement();
+            case 'while':
+                return parseWhileStatement();
+            case 'with':
+                return parseWithStatement();
+            default:
+                break;
+            }
+        }
+
+        marker = markerCreate();
+        expr = parseExpression();
+
+        // 12.12 Labelled Statements
+        if ((expr.type === Syntax.Identifier) && match(':')) {
+            lex();
+
+            key = '$' + expr.name;
+            if (Object.prototype.hasOwnProperty.call(state.labelSet, key)) {
+                throwError({}, Messages.Redeclaration, 'Label', expr.name);
+            }
+
+            state.labelSet[key] = true;
+            labeledBody = parseStatement();
+            delete state.labelSet[key];
+            return markerApply(marker, delegate.createLabeledStatement(expr, labeledBody));
+        }
+
+        consumeSemicolon();
+
+        return markerApply(marker, delegate.createExpressionStatement(expr));
+    }
+
+    // 13 Function Definition
+
+    function parseConciseBody() {
+        if (match('{')) {
+            return parseFunctionSourceElements();
+        }
+        return parseAssignmentExpression();
+    }
+
+    function parseFunctionSourceElements() {
+        var sourceElement, sourceElements = [], token, directive, firstRestricted,
+            oldLabelSet, oldInIteration, oldInSwitch, oldInFunctionBody, oldParenthesizedCount,
+            marker = markerCreate();
+
+        expect('{');
+
+        while (index < length) {
+            if (lookahead.type !== Token.StringLiteral) {
+                break;
+            }
+            token = lookahead;
+
+            sourceElement = parseSourceElement();
+            sourceElements.push(sourceElement);
+            if (sourceElement.expression.type !== Syntax.Literal) {
+                // this is not directive
+                break;
+            }
+            directive = source.slice(token.range[0] + 1, token.range[1] - 1);
+            if (directive === 'use strict') {
+                strict = true;
+                if (firstRestricted) {
+                    throwErrorTolerant(firstRestricted, Messages.StrictOctalLiteral);
+                }
+            } else {
+                if (!firstRestricted && token.octal) {
+                    firstRestricted = token;
+                }
+            }
+        }
+
+        oldLabelSet = state.labelSet;
+        oldInIteration = state.inIteration;
+        oldInSwitch = state.inSwitch;
+        oldInFunctionBody = state.inFunctionBody;
+        oldParenthesizedCount = state.parenthesizedCount;
+
+        state.labelSet = {};
+        state.inIteration = false;
+        state.inSwitch = false;
+        state.inFunctionBody = true;
+        state.parenthesizedCount = 0;
+
+        while (index < length) {
+            if (match('}')) {
+                break;
+            }
+            sourceElement = parseSourceElement();
+            if (typeof sourceElement === 'undefined') {
+                break;
+            }
+            sourceElements.push(sourceElement);
+        }
+
+        expect('}');
+
+        state.labelSet = oldLabelSet;
+        state.inIteration = oldInIteration;
+        state.inSwitch = oldInSwitch;
+        state.inFunctionBody = oldInFunctionBody;
+        state.parenthesizedCount = oldParenthesizedCount;
+
+        return markerApply(marker, delegate.createBlockStatement(sourceElements));
+    }
+
+    function validateParam(options, param, name) {
+        var key = '$' + name;
+        if (strict) {
+            if (isRestrictedWord(name)) {
+                options.stricted = param;
+                options.message = Messages.StrictParamName;
+            }
+            if (Object.prototype.hasOwnProperty.call(options.paramSet, key)) {
+                options.stricted = param;
+                options.message = Messages.StrictParamDupe;
+            }
+        } else if (!options.firstRestricted) {
+            if (isRestrictedWord(name)) {
+                options.firstRestricted = param;
+                options.message = Messages.StrictParamName;
+            } else if (isStrictModeReservedWord(name)) {
+                options.firstRestricted = param;
+                options.message = Messages.StrictReservedWord;
+            } else if (Object.prototype.hasOwnProperty.call(options.paramSet, key)) {
+                options.firstRestricted = param;
+                options.message = Messages.StrictParamDupe;
+            }
+        }
+        options.paramSet[key] = true;
+    }
+
+    function parseParam(options) {
+        var token, rest, param, def;
+
+        token = lookahead;
+        if (token.value === '...') {
+            token = lex();
+            rest = true;
+        }
+
+        if (match('[')) {
+            param = parseArrayInitialiser();
+            reinterpretAsDestructuredParameter(options, param);
+        } else if (match('{')) {
+            if (rest) {
+                throwError({}, Messages.ObjectPatternAsRestParameter);
+            }
+            param = parseObjectInitialiser();
+            reinterpretAsDestructuredParameter(options, param);
+        } else {
+            // Typing rest params is awkward, so punting on that for now
+            param =
+                rest
+                ? parseVariableIdentifier()
+                : parseTypeAnnotatableIdentifier(
+                    false, /* requireTypeAnnotation */
+                    true /* canBeOptionalParam */
+                );
+
+            validateParam(options, token, token.value);
+        }
+
+        if (match('=')) {
+            if (rest) {
+                throwErrorTolerant(lookahead, Messages.DefaultRestParameter);
+            }
+            lex();
+            def = parseAssignmentExpression();
+            ++options.defaultCount;
+        }
+
+        if (rest) {
+            if (!match(')')) {
+                throwError({}, Messages.ParameterAfterRestParameter);
+            }
+            options.rest = param;
+            return false;
+        }
+
+        options.params.push(param);
+        options.defaults.push(def);
+        return !match(')');
+    }
+
+    function parseParams(firstRestricted) {
+        var options, marker = markerCreate();
+
+        options = {
+            params: [],
+            defaultCount: 0,
+            defaults: [],
+            rest: null,
+            firstRestricted: firstRestricted
+        };
+
+        expect('(');
+
+        if (!match(')')) {
+            options.paramSet = {};
+            while (index < length) {
+                if (!parseParam(options)) {
+                    break;
+                }
+                expect(',');
+            }
+        }
+
+        expect(')');
+
+        if (options.defaultCount === 0) {
+            options.defaults = [];
+        }
+
+        if (match(':')) {
+            options.returnType = parseTypeAnnotation();
+        }
+
+        return markerApply(marker, options);
+    }
+
+    function parseFunctionDeclaration() {
+        var id, body, token, tmp, firstRestricted, message, previousStrict, previousYieldAllowed, generator,
+            marker = markerCreate(), parametricType;
+
+        expectKeyword('function');
+
+        generator = false;
+        if (match('*')) {
+            lex();
+            generator = true;
+        }
+
+        token = lookahead;
+
+        id = parseVariableIdentifier();
+
+        if (match('<')) {
+            parametricType = parseParametricTypeAnnotation();
+        }
+
+        if (strict) {
+            if (isRestrictedWord(token.value)) {
+                throwErrorTolerant(token, Messages.StrictFunctionName);
+            }
+        } else {
+            if (isRestrictedWord(token.value)) {
+                firstRestricted = token;
+                message = Messages.StrictFunctionName;
+            } else if (isStrictModeReservedWord(token.value)) {
+                firstRestricted = token;
+                message = Messages.StrictReservedWord;
+            }
+        }
+
+        tmp = parseParams(firstRestricted);
+        firstRestricted = tmp.firstRestricted;
+        if (tmp.message) {
+            message = tmp.message;
+        }
+
+        previousStrict = strict;
+        previousYieldAllowed = state.yieldAllowed;
+        state.yieldAllowed = generator;
+
+        body = parseFunctionSourceElements();
+
+        if (strict && firstRestricted) {
+            throwError(firstRestricted, message);
+        }
+        if (strict && tmp.stricted) {
+            throwErrorTolerant(tmp.stricted, message);
+        }
+        strict = previousStrict;
+        state.yieldAllowed = previousYieldAllowed;
+
+        return markerApply(marker, delegate.createFunctionDeclaration(id, tmp.params, tmp.defaults, body, tmp.rest, generator, false,
+            tmp.returnType, parametricType));
+    }
+
+    function parseFunctionExpression() {
+        var token, id = null, firstRestricted, message, tmp, body, previousStrict, previousYieldAllowed, generator,
+            marker = markerCreate(), parametricType;
+
+        expectKeyword('function');
+
+        generator = false;
+
+        if (match('*')) {
+            lex();
+            generator = true;
+        }
+
+        if (!match('(')) {
+            if (!match('<')) {
+                token = lookahead;
+                id = parseVariableIdentifier();
+
+                if (strict) {
+                    if (isRestrictedWord(token.value)) {
+                        throwErrorTolerant(token, Messages.StrictFunctionName);
+                    }
+                } else {
+                    if (isRestrictedWord(token.value)) {
+                        firstRestricted = token;
+                        message = Messages.StrictFunctionName;
+                    } else if (isStrictModeReservedWord(token.value)) {
+                        firstRestricted = token;
+                        message = Messages.StrictReservedWord;
+                    }
+                }
+            }
+
+            if (match('<')) {
+                parametricType = parseParametricTypeAnnotation();
+            }
+        }
+
+        tmp = parseParams(firstRestricted);
+        firstRestricted = tmp.firstRestricted;
+        if (tmp.message) {
+            message = tmp.message;
+        }
+
+        previousStrict = strict;
+        previousYieldAllowed = state.yieldAllowed;
+        state.yieldAllowed = generator;
+
+        body = parseFunctionSourceElements();
+
+        if (strict && firstRestricted) {
+            throwError(firstRestricted, message);
+        }
+        if (strict && tmp.stricted) {
+            throwErrorTolerant(tmp.stricted, message);
+        }
+        strict = previousStrict;
+        state.yieldAllowed = previousYieldAllowed;
+
+        return markerApply(marker, delegate.createFunctionExpression(id, tmp.params, tmp.defaults, body, tmp.rest, generator, false,
+            tmp.returnType, parametricType));
+    }
+
+    function parseYieldExpression() {
+        var yieldToken, delegateFlag, expr, marker = markerCreate();
+
+        yieldToken = lex();
+        assert(yieldToken.value === 'yield', 'Called parseYieldExpression with non-yield lookahead.');
+
+        if (!state.yieldAllowed) {
+            throwErrorTolerant({}, Messages.IllegalYield);
+        }
+
+        delegateFlag = false;
+        if (match('*')) {
+            lex();
+            delegateFlag = true;
+        }
+
+        expr = parseAssignmentExpression();
+
+        return markerApply(marker, delegate.createYieldExpression(expr, delegateFlag));
+    }
+
+    // 14 Classes
+
+    function parseMethodDefinition(existingPropNames) {
+        var token, key, param, propType, isValidDuplicateProp = false,
+            marker = markerCreate(), token2, parametricType,
+            parametricTypeMarker, annotationMarker;
+
+        if (lookahead.value === 'static') {
+            propType = ClassPropertyType["static"];
+            lex();
+        } else {
+            propType = ClassPropertyType.prototype;
+        }
+
+        if (match('*')) {
+            lex();
+            return markerApply(marker, delegate.createMethodDefinition(
+                propType,
+                '',
+                parseObjectPropertyKey(),
+                parsePropertyMethodFunction({ generator: true })
+            ));
+        }
+
+        token = lookahead;
+        //parametricTypeMarker = markerCreate();
+        key = parseObjectPropertyKey();
+
+        if (token.value === 'get' && !match('(')) {
+            key = parseObjectPropertyKey();
+
+            // It is a syntax error if any other properties have a name
+            // duplicating this one unless they are a setter
+            if (existingPropNames[propType].hasOwnProperty(key.name)) {
+                isValidDuplicateProp =
+                    // There isn't already a getter for this prop
+                    existingPropNames[propType][key.name].get === undefined
+                    // There isn't already a data prop by this name
+                    && existingPropNames[propType][key.name].data === undefined
+                    // The only existing prop by this name is a setter
+                    && existingPropNames[propType][key.name].set !== undefined;
+                if (!isValidDuplicateProp) {
+                    throwError(key, Messages.IllegalDuplicateClassProperty);
+                }
+            } else {
+                existingPropNames[propType][key.name] = {};
+            }
+            existingPropNames[propType][key.name].get = true;
+
+            expect('(');
+            expect(')');
+            return markerApply(marker, delegate.createMethodDefinition(
+                propType,
+                'get',
+                key,
+                parsePropertyFunction({ generator: false })
+            ));
+        }
+        if (token.value === 'set' && !match('(')) {
+            key = parseObjectPropertyKey();
+
+            // It is a syntax error if any other properties have a name
+            // duplicating this one unless they are a getter
+            if (existingPropNames[propType].hasOwnProperty(key.name)) {
+                isValidDuplicateProp =
+                    // There isn't already a setter for this prop
+                    existingPropNames[propType][key.name].set === undefined
+                    // There isn't already a data prop by this name
+                    && existingPropNames[propType][key.name].data === undefined
+                    // The only existing prop by this name is a getter
+                    && existingPropNames[propType][key.name].get !== undefined;
+                if (!isValidDuplicateProp) {
+                    throwError(key, Messages.IllegalDuplicateClassProperty);
+                }
+            } else {
+                existingPropNames[propType][key.name] = {};
+            }
+            existingPropNames[propType][key.name].set = true;
+
+            expect('(');
+            token = lookahead;
+            param = [ parseTypeAnnotatableIdentifier() ];
+            expect(')');
+            return markerApply(marker, delegate.createMethodDefinition(
+                propType,
+                'set',
+                key,
+                parsePropertyFunction({ params: param, generator: false, name: token })
+            ));
+        }
+
+        if (match('<')) {
+            parametricType = parseParametricTypeAnnotation();
+        }
+
+        // It is a syntax error if any other properties have the same name as a
+        // non-getter, non-setter method
+        if (existingPropNames[propType].hasOwnProperty(key.name)) {
+            throwError(key, Messages.IllegalDuplicateClassProperty);
+        } else {
+            existingPropNames[propType][key.name] = {};
+        }
+        existingPropNames[propType][key.name].data = true;
+
+        return markerApply(marker, delegate.createMethodDefinition(
+            propType,
+            '',
+            key,
+            parsePropertyMethodFunction({
+                generator: false,
+                parametricType: parametricType
+            })
+        ));
+    }
+
+    function parseClassProperty(existingPropNames) {
+        var marker = markerCreate(), propertyIdentifier;
+
+        propertyIdentifier = parseTypeAnnotatableIdentifier();
+        expect(';');
+
+        return markerApply(marker, delegate.createClassProperty(
+            propertyIdentifier
+        ));
+    }
+
+    function parseClassElement(existingProps) {
+        if (match(';')) {
+            lex();
+            return;
+        }
+
+        var doubleLookahead = lookahead2();
+        if (doubleLookahead.type === Token.Punctuator) {
+            if (doubleLookahead.value === ':') {
+                return parseClassProperty(existingProps);
+            }
+        }
+
+        return parseMethodDefinition(existingProps);
+    }
+
+    function parseClassBody() {
+        var classElement, classElements = [], existingProps = {}, marker = markerCreate();
+
+        existingProps[ClassPropertyType["static"]] = {};
+        existingProps[ClassPropertyType.prototype] = {};
+
+        expect('{');
+
+        while (index < length) {
+            if (match('}')) {
+                break;
+            }
+            classElement = parseClassElement(existingProps);
+
+            if (typeof classElement !== 'undefined') {
+                classElements.push(classElement);
+            }
+        }
+
+        expect('}');
+
+        return markerApply(marker, delegate.createClassBody(classElements));
+    }
+
+    function parseClassExpression() {
+        var id, previousYieldAllowed, superClass = null, marker = markerCreate(),
+            parametricType;
+
+        expectKeyword('class');
+
+        if (!matchKeyword('extends') && !match('{')) {
+            id = parseVariableIdentifier();
+        }
+
+        if (match('<')) {
+            parametricType = parseParametricTypeAnnotation();
+        }
+
+        if (matchKeyword('extends')) {
+            expectKeyword('extends');
+            previousYieldAllowed = state.yieldAllowed;
+            state.yieldAllowed = false;
+            superClass = parseAssignmentExpression();
+            state.yieldAllowed = previousYieldAllowed;
+        }
+
+        return markerApply(marker, delegate.createClassExpression(id, superClass, parseClassBody(), parametricType));
+    }
+
+    function parseClassDeclaration() {
+        var id, previousYieldAllowed, superClass = null, marker = markerCreate(),
+            parametricType, superParametricType;
+
+        expectKeyword('class');
+
+        id = parseVariableIdentifier();
+
+        if (match('<')) {
+            parametricType = parseParametricTypeAnnotation();
+        }
+
+        if (matchKeyword('extends')) {
+            expectKeyword('extends');
+            previousYieldAllowed = state.yieldAllowed;
+            state.yieldAllowed = false;
+            superClass = parseAssignmentExpression();
+            state.yieldAllowed = previousYieldAllowed;
+        }
+
+        return markerApply(marker, delegate.createClassDeclaration(id, superClass, parseClassBody(), parametricType, superParametricType));
+    }
+
+    // 15 Program
+
+    function matchModuleDeclaration() {
+        var id;
+        if (matchContextualKeyword('module')) {
+            id = lookahead2();
+            return id.type === Token.StringLiteral || id.type === Token.Identifier;
+        }
+        return false;
+    }
+
+    function parseSourceElement() {
+        if (lookahead.type === Token.Keyword) {
+            switch (lookahead.value) {
+            case 'const':
+            case 'let':
+                return parseConstLetDeclaration(lookahead.value);
+            case 'function':
+                return parseFunctionDeclaration();
+            case 'export':
+                return parseExportDeclaration();
+            case 'import':
+                return parseImportDeclaration();
+            default:
+                return parseStatement();
+            }
+        }
+
+        if (matchModuleDeclaration()) {
+            throwError({}, Messages.NestedModule);
+        }
+
+        if (lookahead.type !== Token.EOF) {
+            return parseStatement();
+        }
+    }
+
+    function parseProgramElement() {
+        if (lookahead.type === Token.Keyword) {
+            switch (lookahead.value) {
+            case 'export':
+                return parseExportDeclaration();
+            case 'import':
+                return parseImportDeclaration();
+            }
+        }
+
+        if (matchModuleDeclaration()) {
+            return parseModuleDeclaration();
+        }
+
+        return parseSourceElement();
+    }
+
+    function parseProgramElements() {
+        var sourceElement, sourceElements = [], token, directive, firstRestricted;
+
+        while (index < length) {
+            token = lookahead;
+            if (token.type !== Token.StringLiteral) {
+                break;
+            }
+
+            sourceElement = parseProgramElement();
+            sourceElements.push(sourceElement);
+            if (sourceElement.expression.type !== Syntax.Literal) {
+                // this is not directive
+                break;
+            }
+            directive = source.slice(token.range[0] + 1, token.range[1] - 1);
+            if (directive === 'use strict') {
+                strict = true;
+                if (firstRestricted) {
+                    throwErrorTolerant(firstRestricted, Messages.StrictOctalLiteral);
+                }
+            } else {
+                if (!firstRestricted && token.octal) {
+                    firstRestricted = token;
+                }
+            }
+        }
+
+        while (index < length) {
+            sourceElement = parseProgramElement();
+            if (typeof sourceElement === 'undefined') {
+                break;
+            }
+            sourceElements.push(sourceElement);
+        }
+        return sourceElements;
+    }
+
+    function parseModuleElement() {
+        return parseSourceElement();
+    }
+
+    function parseModuleElements() {
+        var list = [],
+            statement;
+
+        while (index < length) {
+            if (match('}')) {
+                break;
+            }
+            statement = parseModuleElement();
+            if (typeof statement === 'undefined') {
+                break;
+            }
+            list.push(statement);
+        }
+
+        return list;
+    }
+
+    function parseModuleBlock() {
+        var block, marker = markerCreate();
+
+        expect('{');
+
+        block = parseModuleElements();
+
+        expect('}');
+
+        return markerApply(marker, delegate.createBlockStatement(block));
+    }
+
+    function parseProgram() {
+        var body, marker = markerCreate();
+        strict = false;
+        peek();
+        body = parseProgramElements();
+        return markerApply(marker, delegate.createProgram(body));
+    }
+
+    // The following functions are needed only when the option to preserve
+    // the comments is active.
+
+    function addComment(type, value, start, end, loc) {
+        var comment;
+
+        assert(typeof start === 'number', 'Comment must have valid position');
+
+        // Because the way the actual token is scanned, often the comments
+        // (if any) are skipped twice during the lexical analysis.
+        // Thus, we need to skip adding a comment if the comment array already
+        // handled it.
+        if (state.lastCommentStart >= start) {
+            return;
+        }
+        state.lastCommentStart = start;
+
+        comment = {
+            type: type,
+            value: value
+        };
+        if (extra.range) {
+            comment.range = [start, end];
+        }
+        if (extra.loc) {
+            comment.loc = loc;
+        }
+        extra.comments.push(comment);
+    }
+
+    function scanComment() {
+        var comment, ch, loc, start, blockComment, lineComment;
+
+        comment = '';
+        blockComment = false;
+        lineComment = false;
+
+        while (index < length) {
+            ch = source[index];
+
+            if (lineComment) {
+                ch = source[index++];
+                if (isLineTerminator(ch.charCodeAt(0))) {
+                    loc.end = {
+                        line: lineNumber,
+                        column: index - lineStart - 1
+                    };
+                    lineComment = false;
+                    addComment('Line', comment, start, index - 1, loc);
+                    if (ch === '\r' && source[index] === '\n') {
+                        ++index;
+                    }
+                    ++lineNumber;
+                    lineStart = index;
+                    comment = '';
+                } else if (index >= length) {
+                    lineComment = false;
+                    comment += ch;
+                    loc.end = {
+                        line: lineNumber,
+                        column: length - lineStart
+                    };
+                    addComment('Line', comment, start, length, loc);
+                } else {
+                    comment += ch;
+                }
+            } else if (blockComment) {
+                if (isLineTerminator(ch.charCodeAt(0))) {
+                    if (ch === '\r' && source[index + 1] === '\n') {
+                        ++index;
+                        comment += '\r\n';
+                    } else {
+                        comment += ch;
+                    }
+                    ++lineNumber;
+                    ++index;
+                    lineStart = index;
+                    if (index >= length) {
+                        throwError({}, Messages.UnexpectedToken, 'ILLEGAL');
+                    }
+                } else {
+                    ch = source[index++];
+                    if (index >= length) {
+                        throwError({}, Messages.UnexpectedToken, 'ILLEGAL');
+                    }
+                    comment += ch;
+                    if (ch === '*') {
+                        ch = source[index];
+                        if (ch === '/') {
+                            comment = comment.substr(0, comment.length - 1);
+                            blockComment = false;
+                            ++index;
+                            loc.end = {
+                                line: lineNumber,
+                                column: index - lineStart
+                            };
+                            addComment('Block', comment, start, index, loc);
+                            comment = '';
+                        }
+                    }
+                }
+            } else if (ch === '/') {
+                ch = source[index + 1];
+                if (ch === '/') {
+                    loc = {
+                        start: {
+                            line: lineNumber,
+                            column: index - lineStart
+                        }
+                    };
+                    start = index;
+                    index += 2;
+                    lineComment = true;
+                    if (index >= length) {
+                        loc.end = {
+                            line: lineNumber,
+                            column: index - lineStart
+                        };
+                        lineComment = false;
+                        addComment('Line', comment, start, index, loc);
+                    }
+                } else if (ch === '*') {
+                    start = index;
+                    index += 2;
+                    blockComment = true;
+                    loc = {
+                        start: {
+                            line: lineNumber,
+                            column: index - lineStart - 2
+                        }
+                    };
+                    if (index >= length) {
+                        throwError({}, Messages.UnexpectedToken, 'ILLEGAL');
+                    }
+                } else {
+                    break;
+                }
+            } else if (isWhiteSpace(ch.charCodeAt(0))) {
+                ++index;
+            } else if (isLineTerminator(ch.charCodeAt(0))) {
+                ++index;
+                if (ch ===  '\r' && source[index] === '\n') {
+                    ++index;
+                }
+                ++lineNumber;
+                lineStart = index;
+            } else {
+                break;
+            }
+        }
+    }
+
+    // 16 XJS
+
+    XHTMLEntities = {
+        quot: '\u0022',
+        amp: '&',
+        apos: '\u0027',
+        lt: '<',
+        gt: '>',
+        nbsp: '\u00A0',
+        iexcl: '\u00A1',
+        cent: '\u00A2',
+        pound: '\u00A3',
+        curren: '\u00A4',
+        yen: '\u00A5',
+        brvbar: '\u00A6',
+        sect: '\u00A7',
+        uml: '\u00A8',
+        copy: '\u00A9',
+        ordf: '\u00AA',
+        laquo: '\u00AB',
+        not: '\u00AC',
+        shy: '\u00AD',
+        reg: '\u00AE',
+        macr: '\u00AF',
+        deg: '\u00B0',
+        plusmn: '\u00B1',
+        sup2: '\u00B2',
+        sup3: '\u00B3',
+        acute: '\u00B4',
+        micro: '\u00B5',
+        para: '\u00B6',
+        middot: '\u00B7',
+        cedil: '\u00B8',
+        sup1: '\u00B9',
+        ordm: '\u00BA',
+        raquo: '\u00BB',
+        frac14: '\u00BC',
+        frac12: '\u00BD',
+        frac34: '\u00BE',
+        iquest: '\u00BF',
+        Agrave: '\u00C0',
+        Aacute: '\u00C1',
+        Acirc: '\u00C2',
+        Atilde: '\u00C3',
+        Auml: '\u00C4',
+        Aring: '\u00C5',
+        AElig: '\u00C6',
+        Ccedil: '\u00C7',
+        Egrave: '\u00C8',
+        Eacute: '\u00C9',
+        Ecirc: '\u00CA',
+        Euml: '\u00CB',
+        Igrave: '\u00CC',
+        Iacute: '\u00CD',
+        Icirc: '\u00CE',
+        Iuml: '\u00CF',
+        ETH: '\u00D0',
+        Ntilde: '\u00D1',
+        Ograve: '\u00D2',
+        Oacute: '\u00D3',
+        Ocirc: '\u00D4',
+        Otilde: '\u00D5',
+        Ouml: '\u00D6',
+        times: '\u00D7',
+        Oslash: '\u00D8',
+        Ugrave: '\u00D9',
+        Uacute: '\u00DA',
+        Ucirc: '\u00DB',
+        Uuml: '\u00DC',
+        Yacute: '\u00DD',
+        THORN: '\u00DE',
+        szlig: '\u00DF',
+        agrave: '\u00E0',
+        aacute: '\u00E1',
+        acirc: '\u00E2',
+        atilde: '\u00E3',
+        auml: '\u00E4',
+        aring: '\u00E5',
+        aelig: '\u00E6',
+        ccedil: '\u00E7',
+        egrave: '\u00E8',
+        eacute: '\u00E9',
+        ecirc: '\u00EA',
+        euml: '\u00EB',
+        igrave: '\u00EC',
+        iacute: '\u00ED',
+        icirc: '\u00EE',
+        iuml: '\u00EF',
+        eth: '\u00F0',
+        ntilde: '\u00F1',
+        ograve: '\u00F2',
+        oacute: '\u00F3',
+        ocirc: '\u00F4',
+        otilde: '\u00F5',
+        ouml: '\u00F6',
+        divide: '\u00F7',
+        oslash: '\u00F8',
+        ugrave: '\u00F9',
+        uacute: '\u00FA',
+        ucirc: '\u00FB',
+        uuml: '\u00FC',
+        yacute: '\u00FD',
+        thorn: '\u00FE',
+        yuml: '\u00FF',
+        OElig: '\u0152',
+        oelig: '\u0153',
+        Scaron: '\u0160',
+        scaron: '\u0161',
+        Yuml: '\u0178',
+        fnof: '\u0192',
+        circ: '\u02C6',
+        tilde: '\u02DC',
+        Alpha: '\u0391',
+        Beta: '\u0392',
+        Gamma: '\u0393',
+        Delta: '\u0394',
+        Epsilon: '\u0395',
+        Zeta: '\u0396',
+        Eta: '\u0397',
+        Theta: '\u0398',
+        Iota: '\u0399',
+        Kappa: '\u039A',
+        Lambda: '\u039B',
+        Mu: '\u039C',
+        Nu: '\u039D',
+        Xi: '\u039E',
+        Omicron: '\u039F',
+        Pi: '\u03A0',
+        Rho: '\u03A1',
+        Sigma: '\u03A3',
+        Tau: '\u03A4',
+        Upsilon: '\u03A5',
+        Phi: '\u03A6',
+        Chi: '\u03A7',
+        Psi: '\u03A8',
+        Omega: '\u03A9',
+        alpha: '\u03B1',
+        beta: '\u03B2',
+        gamma: '\u03B3',
+        delta: '\u03B4',
+        epsilon: '\u03B5',
+        zeta: '\u03B6',
+        eta: '\u03B7',
+        theta: '\u03B8',
+        iota: '\u03B9',
+        kappa: '\u03BA',
+        lambda: '\u03BB',
+        mu: '\u03BC',
+        nu: '\u03BD',
+        xi: '\u03BE',
+        omicron: '\u03BF',
+        pi: '\u03C0',
+        rho: '\u03C1',
+        sigmaf: '\u03C2',
+        sigma: '\u03C3',
+        tau: '\u03C4',
+        upsilon: '\u03C5',
+        phi: '\u03C6',
+        chi: '\u03C7',
+        psi: '\u03C8',
+        omega: '\u03C9',
+        thetasym: '\u03D1',
+        upsih: '\u03D2',
+        piv: '\u03D6',
+        ensp: '\u2002',
+        emsp: '\u2003',
+        thinsp: '\u2009',
+        zwnj: '\u200C',
+        zwj: '\u200D',
+        lrm: '\u200E',
+        rlm: '\u200F',
+        ndash: '\u2013',
+        mdash: '\u2014',
+        lsquo: '\u2018',
+        rsquo: '\u2019',
+        sbquo: '\u201A',
+        ldquo: '\u201C',
+        rdquo: '\u201D',
+        bdquo: '\u201E',
+        dagger: '\u2020',
+        Dagger: '\u2021',
+        bull: '\u2022',
+        hellip: '\u2026',
+        permil: '\u2030',
+        prime: '\u2032',
+        Prime: '\u2033',
+        lsaquo: '\u2039',
+        rsaquo: '\u203A',
+        oline: '\u203E',
+        frasl: '\u2044',
+        euro: '\u20AC',
+        image: '\u2111',
+        weierp: '\u2118',
+        real: '\u211C',
+        trade: '\u2122',
+        alefsym: '\u2135',
+        larr: '\u2190',
+        uarr: '\u2191',
+        rarr: '\u2192',
+        darr: '\u2193',
+        harr: '\u2194',
+        crarr: '\u21B5',
+        lArr: '\u21D0',
+        uArr: '\u21D1',
+        rArr: '\u21D2',
+        dArr: '\u21D3',
+        hArr: '\u21D4',
+        forall: '\u2200',
+        part: '\u2202',
+        exist: '\u2203',
+        empty: '\u2205',
+        nabla: '\u2207',
+        isin: '\u2208',
+        notin: '\u2209',
+        ni: '\u220B',
+        prod: '\u220F',
+        sum: '\u2211',
+        minus: '\u2212',
+        lowast: '\u2217',
+        radic: '\u221A',
+        prop: '\u221D',
+        infin: '\u221E',
+        ang: '\u2220',
+        and: '\u2227',
+        or: '\u2228',
+        cap: '\u2229',
+        cup: '\u222A',
+        'int': '\u222B',
+        there4: '\u2234',
+        sim: '\u223C',
+        cong: '\u2245',
+        asymp: '\u2248',
+        ne: '\u2260',
+        equiv: '\u2261',
+        le: '\u2264',
+        ge: '\u2265',
+        sub: '\u2282',
+        sup: '\u2283',
+        nsub: '\u2284',
+        sube: '\u2286',
+        supe: '\u2287',
+        oplus: '\u2295',
+        otimes: '\u2297',
+        perp: '\u22A5',
+        sdot: '\u22C5',
+        lceil: '\u2308',
+        rceil: '\u2309',
+        lfloor: '\u230A',
+        rfloor: '\u230B',
+        lang: '\u2329',
+        rang: '\u232A',
+        loz: '\u25CA',
+        spades: '\u2660',
+        clubs: '\u2663',
+        hearts: '\u2665',
+        diams: '\u2666'
+    };
+
+    function getQualifiedXJSName(object) {
+        if (object.type === Syntax.XJSIdentifier) {
+            return object.name;
+        }
+        if (object.type === Syntax.XJSNamespacedName) {
+            return object.namespace.name + ':' + object.name.name;
+        }
+        if (object.type === Syntax.XJSMemberExpression) {
+            return (
+                getQualifiedXJSName(object.object) + '.' +
+                getQualifiedXJSName(object.property)
+            );
+        }
+    }
+
+    function isXJSIdentifierStart(ch) {
+        // exclude backslash (\)
+        return (ch !== 92) && isIdentifierStart(ch);
+    }
+
+    function isXJSIdentifierPart(ch) {
+        // exclude backslash (\) and add hyphen (-)
+        return (ch !== 92) && (ch === 45 || isIdentifierPart(ch));
+    }
+
+    function scanXJSIdentifier() {
+        var ch, start, value = '';
+
+        start = index;
+        while (index < length) {
+            ch = source.charCodeAt(index);
+            if (!isXJSIdentifierPart(ch)) {
+                break;
+            }
+            value += source[index++];
+        }
+
+        return {
+            type: Token.XJSIdentifier,
+            value: value,
+            lineNumber: lineNumber,
+            lineStart: lineStart,
+            range: [start, index]
+        };
+    }
+
+    function scanXJSEntity() {
+        var ch, str = '', count = 0, entity;
+        ch = source[index];
+        assert(ch === '&', 'Entity must start with an ampersand');
+        index++;
+        while (index < length && count++ < 10) {
+            ch = source[index++];
+            if (ch === ';') {
+                break;
+            }
+            str += ch;
+        }
+
+        if (str[0] === '#' && str[1] === 'x') {
+            entity = String.fromCharCode(parseInt(str.substr(2), 16));
+        } else if (str[0] === '#') {
+            entity = String.fromCharCode(parseInt(str.substr(1), 10));
+        } else {
+            entity = XHTMLEntities[str];
+        }
+        return entity;
+    }
+
+    function scanXJSText(stopChars) {
+        var ch, str = '', start;
+        start = index;
+        while (index < length) {
+            ch = source[index];
+            if (stopChars.indexOf(ch) !== -1) {
+                break;
+            }
+            if (ch === '&') {
+                str += scanXJSEntity();
+            } else {
+                index++;
+                if (isLineTerminator(ch.charCodeAt(0))) {
+                    ++lineNumber;
+                    lineStart = index;
+                }
+                str += ch;
+            }
+        }
+        return {
+            type: Token.XJSText,
+            value: str,
+            lineNumber: lineNumber,
+            lineStart: lineStart,
+            range: [start, index]
+        };
+    }
+
+    function scanXJSStringLiteral() {
+        var innerToken, quote, start;
+
+        quote = source[index];
+        assert((quote === '\'' || quote === '"'),
+            'String literal must starts with a quote');
+
+        start = index;
+        ++index;
+
+        innerToken = scanXJSText([quote]);
+
+        if (quote !== source[index]) {
+            throwError({}, Messages.UnexpectedToken, 'ILLEGAL');
+        }
+
+        ++index;
+
+        innerToken.range = [start, index];
+
+        return innerToken;
+    }
+
+    /**
+     * Between XJS opening and closing tags (e.g. <foo>HERE</foo>), anything that
+     * is not another XJS tag and is not an expression wrapped by {} is text.
+     */
+    function advanceXJSChild() {
+        var ch = source.charCodeAt(index);
+
+        // { (123) and < (60)
+        if (ch !== 123 && ch !== 60) {
+            return scanXJSText(['<', '{']);
+        }
+
+        return scanPunctuator();
+    }
+
+    function parseXJSIdentifier() {
+        var token, marker = markerCreate();
+
+        if (lookahead.type !== Token.XJSIdentifier) {
+            throwUnexpected(lookahead);
+        }
+
+        token = lex();
+        return markerApply(marker, delegate.createXJSIdentifier(token.value));
+    }
+
+    function parseXJSNamespacedName() {
+        var namespace, name, marker = markerCreate();
+
+        namespace = parseXJSIdentifier();
+        expect(':');
+        name = parseXJSIdentifier();
+
+        return markerApply(marker, delegate.createXJSNamespacedName(namespace, name));
+    }
+
+    function parseXJSMemberExpression() {
+        var marker = markerCreate(),
+            expr = parseXJSIdentifier();
+
+        while (match('.')) {
+            lex();
+            expr = markerApply(marker, delegate.createXJSMemberExpression(expr, parseXJSIdentifier()));
+        }
+
+        return expr;
+    }
+
+    function parseXJSElementName() {
+        if (lookahead2().value === ':') {
+            return parseXJSNamespacedName();
+        }
+        if (lookahead2().value === '.') {
+            return parseXJSMemberExpression();
+        }
+
+        return parseXJSIdentifier();
+    }
+
+    function parseXJSAttributeName() {
+        if (lookahead2().value === ':') {
+            return parseXJSNamespacedName();
+        }
+
+        return parseXJSIdentifier();
+    }
+
+    function parseXJSAttributeValue() {
+        var value, marker;
+        if (match('{')) {
+            value = parseXJSExpressionContainer();
+            if (value.expression.type === Syntax.XJSEmptyExpression) {
+                throwError(
+                    value,
+                    'XJS attributes must only be assigned a non-empty ' +
+                        'expression'
+                );
+            }
+        } else if (match('<')) {
+            value = parseXJSElement();
+        } else if (lookahead.type === Token.XJSText) {
+            marker = markerCreate();
+            value = markerApply(marker, delegate.createLiteral(lex()));
+        } else {
+            throwError({}, Messages.InvalidXJSAttributeValue);
+        }
+        return value;
+    }
+
+    function parseXJSEmptyExpression() {
+        var marker = markerCreatePreserveWhitespace();
+        while (source.charAt(index) !== '}') {
+            index++;
+        }
+        return markerApply(marker, delegate.createXJSEmptyExpression());
+    }
+
+    function parseXJSExpressionContainer() {
+        var expression, origInXJSChild, origInXJSTag, marker = markerCreate();
+
+        origInXJSChild = state.inXJSChild;
+        origInXJSTag = state.inXJSTag;
+        state.inXJSChild = false;
+        state.inXJSTag = false;
+
+        expect('{');
+
+        if (match('}')) {
+            expression = parseXJSEmptyExpression();
+        } else {
+            expression = parseExpression();
+        }
+
+        state.inXJSChild = origInXJSChild;
+        state.inXJSTag = origInXJSTag;
+
+        expect('}');
+
+        return markerApply(marker, delegate.createXJSExpressionContainer(expression));
+    }
+
+    function parseXJSSpreadAttribute() {
+        var expression, origInXJSChild, origInXJSTag, marker = markerCreate();
+
+        origInXJSChild = state.inXJSChild;
+        origInXJSTag = state.inXJSTag;
+        state.inXJSChild = false;
+        state.inXJSTag = false;
+
+        expect('{');
+        expect('...');
+
+        expression = parseAssignmentExpression();
+
+        state.inXJSChild = origInXJSChild;
+        state.inXJSTag = origInXJSTag;
+
+        expect('}');
+
+        return markerApply(marker, delegate.createXJSSpreadAttribute(expression));
+    }
+
+    function parseXJSAttribute() {
+        var name, marker;
+
+        if (match('{')) {
+            return parseXJSSpreadAttribute();
+        }
+
+        marker = markerCreate();
+
+        name = parseXJSAttributeName();
+
+        // HTML empty attribute
+        if (match('=')) {
+            lex();
+            return markerApply(marker, delegate.createXJSAttribute(name, parseXJSAttributeValue()));
+        }
+
+        return markerApply(marker, delegate.createXJSAttribute(name));
+    }
+
+    function parseXJSChild() {
+        var token, marker;
+        if (match('{')) {
+            token = parseXJSExpressionContainer();
+        } else if (lookahead.type === Token.XJSText) {
+            marker = markerCreatePreserveWhitespace();
+            token = markerApply(marker, delegate.createLiteral(lex()));
+        } else {
+            token = parseXJSElement();
+        }
+        return token;
+    }
+
+    function parseXJSClosingElement() {
+        var name, origInXJSChild, origInXJSTag, marker = markerCreate();
+        origInXJSChild = state.inXJSChild;
+        origInXJSTag = state.inXJSTag;
+        state.inXJSChild = false;
+        state.inXJSTag = true;
+        expect('<');
+        expect('/');
+        name = parseXJSElementName();
+        // Because advance() (called by lex() called by expect()) expects there
+        // to be a valid token after >, it needs to know whether to look for a
+        // standard JS token or an XJS text node
+        state.inXJSChild = origInXJSChild;
+        state.inXJSTag = origInXJSTag;
+        expect('>');
+        return markerApply(marker, delegate.createXJSClosingElement(name));
+    }
+
+    function parseXJSOpeningElement() {
+        var name, attribute, attributes = [], selfClosing = false, origInXJSChild, origInXJSTag, marker = markerCreate();
+
+        origInXJSChild = state.inXJSChild;
+        origInXJSTag = state.inXJSTag;
+        state.inXJSChild = false;
+        state.inXJSTag = true;
+
+        expect('<');
+
+        name = parseXJSElementName();
+
+        while (index < length &&
+                lookahead.value !== '/' &&
+                lookahead.value !== '>') {
+            attributes.push(parseXJSAttribute());
+        }
+
+        state.inXJSTag = origInXJSTag;
+
+        if (lookahead.value === '/') {
+            expect('/');
+            // Because advance() (called by lex() called by expect()) expects
+            // there to be a valid token after >, it needs to know whether to
+            // look for a standard JS token or an XJS text node
+            state.inXJSChild = origInXJSChild;
+            expect('>');
+            selfClosing = true;
+        } else {
+            state.inXJSChild = true;
+            expect('>');
+        }
+        return markerApply(marker, delegate.createXJSOpeningElement(name, attributes, selfClosing));
+    }
+
+    function parseXJSElement() {
+        var openingElement, closingElement, children = [], origInXJSChild, origInXJSTag, marker = markerCreate();
+
+        origInXJSChild = state.inXJSChild;
+        origInXJSTag = state.inXJSTag;
+        openingElement = parseXJSOpeningElement();
+
+        if (!openingElement.selfClosing) {
+            while (index < length) {
+                state.inXJSChild = false; // Call lookahead2() with inXJSChild = false because </ should not be considered in the child
+                if (lookahead.value === '<' && lookahead2().value === '/') {
+                    break;
+                }
+                state.inXJSChild = true;
+                children.push(parseXJSChild());
+            }
+            state.inXJSChild = origInXJSChild;
+            state.inXJSTag = origInXJSTag;
+            closingElement = parseXJSClosingElement();
+            if (getQualifiedXJSName(closingElement.name) !== getQualifiedXJSName(openingElement.name)) {
+                throwError({}, Messages.ExpectedXJSClosingTag, getQualifiedXJSName(openingElement.name));
+            }
+        }
+
+        // When (erroneously) writing two adjacent tags like
+        //
+        //     var x = <div>one</div><div>two</div>;
+        //
+        // the default error message is a bit incomprehensible. Since it's
+        // rarely (never?) useful to write a less-than sign after an XJS
+        // element, we disallow it here in the parser in order to provide a
+        // better error message. (In the rare case that the less-than operator
+        // was intended, the left tag can be wrapped in parentheses.)
+        if (!origInXJSChild && match('<')) {
+            throwError(lookahead, Messages.AdjacentXJSElements);
+        }
+
+        return markerApply(marker, delegate.createXJSElement(openingElement, closingElement, children));
+    }
+
+    function collectToken() {
+        var start, loc, token, range, value;
+
+        if (!state.inXJSChild) {
+            skipComment();
+        }
+
+        start = index;
+        loc = {
+            start: {
+                line: lineNumber,
+                column: index - lineStart
+            }
+        };
+
+        token = extra.advance();
+        loc.end = {
+            line: lineNumber,
+            column: index - lineStart
+        };
+
+        if (token.type !== Token.EOF) {
+            range = [token.range[0], token.range[1]];
+            value = source.slice(token.range[0], token.range[1]);
+            extra.tokens.push({
+                type: TokenName[token.type],
+                value: value,
+                range: range,
+                loc: loc
+            });
+        }
+
+        return token;
+    }
+
+    function collectRegex() {
+        var pos, loc, regex, token;
+
+        skipComment();
+
+        pos = index;
+        loc = {
+            start: {
+                line: lineNumber,
+                column: index - lineStart
+            }
+        };
+
+        regex = extra.scanRegExp();
+        loc.end = {
+            line: lineNumber,
+            column: index - lineStart
+        };
+
+        if (!extra.tokenize) {
+            // Pop the previous token, which is likely '/' or '/='
+            if (extra.tokens.length > 0) {
+                token = extra.tokens[extra.tokens.length - 1];
+                if (token.range[0] === pos && token.type === 'Punctuator') {
+                    if (token.value === '/' || token.value === '/=') {
+                        extra.tokens.pop();
+                    }
+                }
+            }
+
+            extra.tokens.push({
+                type: 'RegularExpression',
+                value: regex.literal,
+                range: [pos, index],
+                loc: loc
+            });
+        }
+
+        return regex;
+    }
+
+    function filterTokenLocation() {
+        var i, entry, token, tokens = [];
+
+        for (i = 0; i < extra.tokens.length; ++i) {
+            entry = extra.tokens[i];
+            token = {
+                type: entry.type,
+                value: entry.value
+            };
+            if (extra.range) {
+                token.range = entry.range;
+            }
+            if (extra.loc) {
+                token.loc = entry.loc;
+            }
+            tokens.push(token);
+        }
+
+        extra.tokens = tokens;
+    }
+
+    function patch() {
+        if (extra.comments) {
+            extra.skipComment = skipComment;
+            skipComment = scanComment;
+        }
+
+        if (typeof extra.tokens !== 'undefined') {
+            extra.advance = advance;
+            extra.scanRegExp = scanRegExp;
+
+            advance = collectToken;
+            scanRegExp = collectRegex;
+        }
+    }
+
+    function unpatch() {
+        if (typeof extra.skipComment === 'function') {
+            skipComment = extra.skipComment;
+        }
+
+        if (typeof extra.scanRegExp === 'function') {
+            advance = extra.advance;
+            scanRegExp = extra.scanRegExp;
+        }
+    }
+
+    // This is used to modify the delegate.
+
+    function extend(object, properties) {
+        var entry, result = {};
+
+        for (entry in object) {
+            if (object.hasOwnProperty(entry)) {
+                result[entry] = object[entry];
+            }
+        }
+
+        for (entry in properties) {
+            if (properties.hasOwnProperty(entry)) {
+                result[entry] = properties[entry];
+            }
+        }
+
+        return result;
+    }
+
+    function tokenize(code, options) {
+        var toString,
+            token,
+            tokens;
+
+        toString = String;
+        if (typeof code !== 'string' && !(code instanceof String)) {
+            code = toString(code);
+        }
+
+        delegate = SyntaxTreeDelegate;
+        source = code;
+        index = 0;
+        lineNumber = (source.length > 0) ? 1 : 0;
+        lineStart = 0;
+        length = source.length;
+        lookahead = null;
+        state = {
+            allowKeyword: true,
+            allowIn: true,
+            labelSet: {},
+            inFunctionBody: false,
+            inIteration: false,
+            inSwitch: false,
+            lastCommentStart: -1
+        };
+
+        extra = {};
+
+        // Options matching.
+        options = options || {};
+
+        // Of course we collect tokens here.
+        options.tokens = true;
+        extra.tokens = [];
+        extra.tokenize = true;
+        // The following two fields are necessary to compute the Regex tokens.
+        extra.openParenToken = -1;
+        extra.openCurlyToken = -1;
+
+        extra.range = (typeof options.range === 'boolean') && options.range;
+        extra.loc = (typeof options.loc === 'boolean') && options.loc;
+
+        if (typeof options.comment === 'boolean' && options.comment) {
+            extra.comments = [];
+        }
+        if (typeof options.tolerant === 'boolean' && options.tolerant) {
+            extra.errors = [];
+        }
+
+        if (length > 0) {
+            if (typeof source[0] === 'undefined') {
+                // Try first to convert to a string. This is good as fast path
+                // for old IE which understands string indexing for string
+                // literals only and not for string object.
+                if (code instanceof String) {
+                    source = code.valueOf();
+                }
+            }
+        }
+
+        patch();
+
+        try {
+            peek();
+            if (lookahead.type === Token.EOF) {
+                return extra.tokens;
+            }
+
+            token = lex();
+            while (lookahead.type !== Token.EOF) {
+                try {
+                    token = lex();
+                } catch (lexError) {
+                    token = lookahead;
+                    if (extra.errors) {
+                        extra.errors.push(lexError);
+                        // We have to break on the first error
+                        // to avoid infinite loops.
+                        break;
+                    } else {
+                        throw lexError;
+                    }
+                }
+            }
+
+            filterTokenLocation();
+            tokens = extra.tokens;
+            if (typeof extra.comments !== 'undefined') {
+                tokens.comments = extra.comments;
+            }
+            if (typeof extra.errors !== 'undefined') {
+                tokens.errors = extra.errors;
+            }
+        } catch (e) {
+            throw e;
+        } finally {
+            unpatch();
+            extra = {};
+        }
+        return tokens;
+    }
+
+    function parse(code, options) {
+        var program, toString;
+
+        toString = String;
+        if (typeof code !== 'string' && !(code instanceof String)) {
+            code = toString(code);
+        }
+
+        delegate = SyntaxTreeDelegate;
+        source = code;
+        index = 0;
+        lineNumber = (source.length > 0) ? 1 : 0;
+        lineStart = 0;
+        length = source.length;
+        lookahead = null;
+        state = {
+            allowKeyword: false,
+            allowIn: true,
+            labelSet: {},
+            parenthesizedCount: 0,
+            inFunctionBody: false,
+            inIteration: false,
+            inSwitch: false,
+            inXJSChild: false,
+            inXJSTag: false,
+            lastCommentStart: -1,
+            yieldAllowed: false
+        };
+
+        extra = {};
+        if (typeof options !== 'undefined') {
+            extra.range = (typeof options.range === 'boolean') && options.range;
+            extra.loc = (typeof options.loc === 'boolean') && options.loc;
+
+            if (extra.loc && options.source !== null && options.source !== undefined) {
+                delegate = extend(delegate, {
+                    'postProcess': function (node) {
+                        node.loc.source = toString(options.source);
+                        return node;
+                    }
+                });
+            }
+
+            if (typeof options.tokens === 'boolean' && options.tokens) {
+                extra.tokens = [];
+            }
+            if (typeof options.comment === 'boolean' && options.comment) {
+                extra.comments = [];
+            }
+            if (typeof options.tolerant === 'boolean' && options.tolerant) {
+                extra.errors = [];
+            }
+        }
+
+        if (length > 0) {
+            if (typeof source[0] === 'undefined') {
+                // Try first to convert to a string. This is good as fast path
+                // for old IE which understands string indexing for string
+                // literals only and not for string object.
+                if (code instanceof String) {
+                    source = code.valueOf();
+                }
+            }
+        }
+
+        patch();
+        try {
+            program = parseProgram();
+            if (typeof extra.comments !== 'undefined') {
+                program.comments = extra.comments;
+            }
+            if (typeof extra.tokens !== 'undefined') {
+                filterTokenLocation();
+                program.tokens = extra.tokens;
+            }
+            if (typeof extra.errors !== 'undefined') {
+                program.errors = extra.errors;
+            }
+        } catch (e) {
+            throw e;
+        } finally {
+            unpatch();
+            extra = {};
+        }
+
+        return program;
+    }
+
+    // Sync with *.json manifests.
+    exports.version = '4001.3001.0000-dev-harmony-fb';
+
+    exports.tokenize = tokenize;
+
+    exports.parse = parse;
+
+    // Deep copy.
+    exports.Syntax = (function () {
+        var name, types = {};
+
+        if (typeof Object.create === 'function') {
+            types = Object.create(null);
+        }
+
+        for (name in Syntax) {
+            if (Syntax.hasOwnProperty(name)) {
+                types[name] = Syntax[name];
+            }
+        }
+
+        if (typeof Object.freeze === 'function') {
+            Object.freeze(types);
+        }
+
+        return types;
+    }());
+
+}));
+/* vim: set sw=4 ts=4 et tw=80 : */
+
+},{}],7:[function(_dereq_,module,exports){
+var Base62 = (function (my) {
+  my.chars = ["0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z", "A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z"]
+
+  my.encode = function(i){
+    if (i === 0) {return '0'}
+    var s = ''
+    while (i > 0) {
+      s = this.chars[i % 62] + s
+      i = Math.floor(i/62)
+    }
+    return s
+  };
+  my.decode = function(a,b,c,d){
+    for (
+      b = c = (
+        a === (/\W|_|^$/.test(a += "") || a)
+      ) - 1;
+      d = a.charCodeAt(c++);
+    )
+    b = b * 62 + d - [, 48, 29, 87][d >> 5];
+    return b
+  };
+
+  return my;
+}({}));
+
+module.exports = Base62
+},{}],8:[function(_dereq_,module,exports){
+/*
+ * Copyright 2009-2011 Mozilla Foundation and contributors
+ * Licensed under the New BSD license. See LICENSE.txt or:
+ * http://opensource.org/licenses/BSD-3-Clause
+ */
+exports.SourceMapGenerator = _dereq_('./source-map/source-map-generator').SourceMapGenerator;
+exports.SourceMapConsumer = _dereq_('./source-map/source-map-consumer').SourceMapConsumer;
+exports.SourceNode = _dereq_('./source-map/source-node').SourceNode;
+
+},{"./source-map/source-map-consumer":13,"./source-map/source-map-generator":14,"./source-map/source-node":15}],9:[function(_dereq_,module,exports){
+/* -*- Mode: js; js-indent-level: 2; -*- */
+/*
+ * Copyright 2011 Mozilla Foundation and contributors
+ * Licensed under the New BSD license. See LICENSE or:
+ * http://opensource.org/licenses/BSD-3-Clause
+ */
+if (typeof define !== 'function') {
+    var define = _dereq_('amdefine')(module, _dereq_);
+}
+define(function (_dereq_, exports, module) {
+
+  var util = _dereq_('./util');
+
+  /**
+   * A data structure which is a combination of an array and a set. Adding a new
+   * member is O(1), testing for membership is O(1), and finding the index of an
+   * element is O(1). Removing elements from the set is not supported. Only
+   * strings are supported for membership.
+   */
+  function ArraySet() {
+    this._array = [];
+    this._set = {};
+  }
+
+  /**
+   * Static method for creating ArraySet instances from an existing array.
+   */
+  ArraySet.fromArray = function ArraySet_fromArray(aArray, aAllowDuplicates) {
+    var set = new ArraySet();
+    for (var i = 0, len = aArray.length; i < len; i++) {
+      set.add(aArray[i], aAllowDuplicates);
+    }
+    return set;
+  };
+
+  /**
+   * Add the given string to this set.
+   *
+   * @param String aStr
+   */
+  ArraySet.prototype.add = function ArraySet_add(aStr, aAllowDuplicates) {
+    var isDuplicate = this.has(aStr);
+    var idx = this._array.length;
+    if (!isDuplicate || aAllowDuplicates) {
+      this._array.push(aStr);
+    }
+    if (!isDuplicate) {
+      this._set[util.toSetString(aStr)] = idx;
+    }
+  };
+
+  /**
+   * Is the given string a member of this set?
+   *
+   * @param String aStr
+   */
+  ArraySet.prototype.has = function ArraySet_has(aStr) {
+    return Object.prototype.hasOwnProperty.call(this._set,
+                                                util.toSetString(aStr));
+  };
+
+  /**
+   * What is the index of the given string in the array?
+   *
+   * @param String aStr
+   */
+  ArraySet.prototype.indexOf = function ArraySet_indexOf(aStr) {
+    if (this.has(aStr)) {
+      return this._set[util.toSetString(aStr)];
+    }
+    throw new Error('"' + aStr + '" is not in the set.');
+  };
+
+  /**
+   * What is the element at the given index?
+   *
+   * @param Number aIdx
+   */
+  ArraySet.prototype.at = function ArraySet_at(aIdx) {
+    if (aIdx >= 0 && aIdx < this._array.length) {
+      return this._array[aIdx];
+    }
+    throw new Error('No element indexed by ' + aIdx);
+  };
+
+  /**
+   * Returns the array representation of this set (which has the proper indices
+   * indicated by indexOf). Note that this is a copy of the internal array used
+   * for storing the members so that no one can mess with internal state.
+   */
+  ArraySet.prototype.toArray = function ArraySet_toArray() {
+    return this._array.slice();
+  };
+
+  exports.ArraySet = ArraySet;
+
+});
+
+},{"./util":16,"amdefine":17}],10:[function(_dereq_,module,exports){
+/* -*- Mode: js; js-indent-level: 2; -*- */
+/*
+ * Copyright 2011 Mozilla Foundation and contributors
+ * Licensed under the New BSD license. See LICENSE or:
+ * http://opensource.org/licenses/BSD-3-Clause
+ *
+ * Based on the Base 64 VLQ implementation in Closure Compiler:
+ * https://code.google.com/p/closure-compiler/source/browse/trunk/src/com/google/debugging/sourcemap/Base64VLQ.java
+ *
+ * Copyright 2011 The Closure Compiler Authors. All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *  * Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  * Redistributions in binary form must reproduce the above
+ *    copyright notice, this list of conditions and the following
+ *    disclaimer in the documentation and/or other materials provided
+ *    with the distribution.
+ *  * Neither the name of Google Inc. nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+if (typeof define !== 'function') {
+    var define = _dereq_('amdefine')(module, _dereq_);
+}
+define(function (_dereq_, exports, module) {
+
+  var base64 = _dereq_('./base64');
+
+  // A single base 64 digit can contain 6 bits of data. For the base 64 variable
+  // length quantities we use in the source map spec, the first bit is the sign,
+  // the next four bits are the actual value, and the 6th bit is the
+  // continuation bit. The continuation bit tells us whether there are more
+  // digits in this value following this digit.
+  //
+  //   Continuation
+  //   |    Sign
+  //   |    |
+  //   V    V
+  //   101011
+
+  var VLQ_BASE_SHIFT = 5;
+
+  // binary: 100000
+  var VLQ_BASE = 1 << VLQ_BASE_SHIFT;
+
+  // binary: 011111
+  var VLQ_BASE_MASK = VLQ_BASE - 1;
+
+  // binary: 100000
+  var VLQ_CONTINUATION_BIT = VLQ_BASE;
+
+  /**
+   * Converts from a two-complement value to a value where the sign bit is
+   * is placed in the least significant bit.  For example, as decimals:
+   *   1 becomes 2 (10 binary), -1 becomes 3 (11 binary)
+   *   2 becomes 4 (100 binary), -2 becomes 5 (101 binary)
+   */
+  function toVLQSigned(aValue) {
+    return aValue < 0
+      ? ((-aValue) << 1) + 1
+      : (aValue << 1) + 0;
+  }
+
+  /**
+   * Converts to a two-complement value from a value where the sign bit is
+   * is placed in the least significant bit.  For example, as decimals:
+   *   2 (10 binary) becomes 1, 3 (11 binary) becomes -1
+   *   4 (100 binary) becomes 2, 5 (101 binary) becomes -2
+   */
+  function fromVLQSigned(aValue) {
+    var isNegative = (aValue & 1) === 1;
+    var shifted = aValue >> 1;
+    return isNegative
+      ? -shifted
+      : shifted;
+  }
+
+  /**
+   * Returns the base 64 VLQ encoded value.
+   */
+  exports.encode = function base64VLQ_encode(aValue) {
+    var encoded = "";
+    var digit;
+
+    var vlq = toVLQSigned(aValue);
+
+    do {
+      digit = vlq & VLQ_BASE_MASK;
+      vlq >>>= VLQ_BASE_SHIFT;
+      if (vlq > 0) {
+        // There are still more digits in this value, so we must make sure the
+        // continuation bit is marked.
+        digit |= VLQ_CONTINUATION_BIT;
+      }
+      encoded += base64.encode(digit);
+    } while (vlq > 0);
+
+    return encoded;
+  };
+
+  /**
+   * Decodes the next base 64 VLQ value from the given string and returns the
+   * value and the rest of the string.
+   */
+  exports.decode = function base64VLQ_decode(aStr) {
+    var i = 0;
+    var strLen = aStr.length;
+    var result = 0;
+    var shift = 0;
+    var continuation, digit;
+
+    do {
+      if (i >= strLen) {
+        throw new Error("Expected more digits in base 64 VLQ value.");
+      }
+      digit = base64.decode(aStr.charAt(i++));
+      continuation = !!(digit & VLQ_CONTINUATION_BIT);
+      digit &= VLQ_BASE_MASK;
+      result = result + (digit << shift);
+      shift += VLQ_BASE_SHIFT;
+    } while (continuation);
+
+    return {
+      value: fromVLQSigned(result),
+      rest: aStr.slice(i)
+    };
+  };
+
+});
+
+},{"./base64":11,"amdefine":17}],11:[function(_dereq_,module,exports){
+/* -*- Mode: js; js-indent-level: 2; -*- */
+/*
+ * Copyright 2011 Mozilla Foundation and contributors
+ * Licensed under the New BSD license. See LICENSE or:
+ * http://opensource.org/licenses/BSD-3-Clause
+ */
+if (typeof define !== 'function') {
+    var define = _dereq_('amdefine')(module, _dereq_);
+}
+define(function (_dereq_, exports, module) {
+
+  var charToIntMap = {};
+  var intToCharMap = {};
+
+  'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'
+    .split('')
+    .forEach(function (ch, index) {
+      charToIntMap[ch] = index;
+      intToCharMap[index] = ch;
+    });
+
+  /**
+   * Encode an integer in the range of 0 to 63 to a single base 64 digit.
+   */
+  exports.encode = function base64_encode(aNumber) {
+    if (aNumber in intToCharMap) {
+      return intToCharMap[aNumber];
+    }
+    throw new TypeError("Must be between 0 and 63: " + aNumber);
+  };
+
+  /**
+   * Decode a single base 64 digit to an integer.
+   */
+  exports.decode = function base64_decode(aChar) {
+    if (aChar in charToIntMap) {
+      return charToIntMap[aChar];
+    }
+    throw new TypeError("Not a valid base 64 digit: " + aChar);
+  };
+
+});
+
+},{"amdefine":17}],12:[function(_dereq_,module,exports){
+/* -*- Mode: js; js-indent-level: 2; -*- */
+/*
+ * Copyright 2011 Mozilla Foundation and contributors
+ * Licensed under the New BSD license. See LICENSE or:
+ * http://opensource.org/licenses/BSD-3-Clause
+ */
+if (typeof define !== 'function') {
+    var define = _dereq_('amdefine')(module, _dereq_);
+}
+define(function (_dereq_, exports, module) {
+
+  /**
+   * Recursive implementation of binary search.
+   *
+   * @param aLow Indices here and lower do not contain the needle.
+   * @param aHigh Indices here and higher do not contain the needle.
+   * @param aNeedle The element being searched for.
+   * @param aHaystack The non-empty array being searched.
+   * @param aCompare Function which takes two elements and returns -1, 0, or 1.
+   */
+  function recursiveSearch(aLow, aHigh, aNeedle, aHaystack, aCompare) {
+    // This function terminates when one of the following is true:
+    //
+    //   1. We find the exact element we are looking for.
+    //
+    //   2. We did not find the exact element, but we can return the next
+    //      closest element that is less than that element.
+    //
+    //   3. We did not find the exact element, and there is no next-closest
+    //      element which is less than the one we are searching for, so we
+    //      return null.
+    var mid = Math.floor((aHigh - aLow) / 2) + aLow;
+    var cmp = aCompare(aNeedle, aHaystack[mid], true);
+    if (cmp === 0) {
+      // Found the element we are looking for.
+      return aHaystack[mid];
+    }
+    else if (cmp > 0) {
+      // aHaystack[mid] is greater than our needle.
+      if (aHigh - mid > 1) {
+        // The element is in the upper half.
+        return recursiveSearch(mid, aHigh, aNeedle, aHaystack, aCompare);
+      }
+      // We did not find an exact match, return the next closest one
+      // (termination case 2).
+      return aHaystack[mid];
+    }
+    else {
+      // aHaystack[mid] is less than our needle.
+      if (mid - aLow > 1) {
+        // The element is in the lower half.
+        return recursiveSearch(aLow, mid, aNeedle, aHaystack, aCompare);
+      }
+      // The exact needle element was not found in this haystack. Determine if
+      // we are in termination case (2) or (3) and return the appropriate thing.
+      return aLow < 0
+        ? null
+        : aHaystack[aLow];
+    }
+  }
+
+  /**
+   * This is an implementation of binary search which will always try and return
+   * the next lowest value checked if there is no exact hit. This is because
+   * mappings between original and generated line/col pairs are single points,
+   * and there is an implicit region between each of them, so a miss just means
+   * that you aren't on the very start of a region.
+   *
+   * @param aNeedle The element you are looking for.
+   * @param aHaystack The array that is being searched.
+   * @param aCompare A function which takes the needle and an element in the
+   *     array and returns -1, 0, or 1 depending on whether the needle is less
+   *     than, equal to, or greater than the element, respectively.
+   */
+  exports.search = function search(aNeedle, aHaystack, aCompare) {
+    return aHaystack.length > 0
+      ? recursiveSearch(-1, aHaystack.length, aNeedle, aHaystack, aCompare)
+      : null;
+  };
+
+});
+
+},{"amdefine":17}],13:[function(_dereq_,module,exports){
+/* -*- Mode: js; js-indent-level: 2; -*- */
+/*
+ * Copyright 2011 Mozilla Foundation and contributors
+ * Licensed under the New BSD license. See LICENSE or:
+ * http://opensource.org/licenses/BSD-3-Clause
+ */
+if (typeof define !== 'function') {
+    var define = _dereq_('amdefine')(module, _dereq_);
+}
+define(function (_dereq_, exports, module) {
+
+  var util = _dereq_('./util');
+  var binarySearch = _dereq_('./binary-search');
+  var ArraySet = _dereq_('./array-set').ArraySet;
+  var base64VLQ = _dereq_('./base64-vlq');
+
+  /**
+   * A SourceMapConsumer instance represents a parsed source map which we can
+   * query for information about the original file positions by giving it a file
+   * position in the generated source.
+   *
+   * The only parameter is the raw source map (either as a JSON string, or
+   * already parsed to an object). According to the spec, source maps have the
+   * following attributes:
+   *
+   *   - version: Which version of the source map spec this map is following.
+   *   - sources: An array of URLs to the original source files.
+   *   - names: An array of identifiers which can be referrenced by individual mappings.
+   *   - sourceRoot: Optional. The URL root from which all sources are relative.
+   *   - sourcesContent: Optional. An array of contents of the original source files.
+   *   - mappings: A string of base64 VLQs which contain the actual mappings.
+   *   - file: The generated file this source map is associated with.
+   *
+   * Here is an example source map, taken from the source map spec[0]:
+   *
+   *     {
+   *       version : 3,
+   *       file: "out.js",
+   *       sourceRoot : "",
+   *       sources: ["foo.js", "bar.js"],
+   *       names: ["src", "maps", "are", "fun"],
+   *       mappings: "AA,AB;;ABCDE;"
+   *     }
+   *
+   * [0]: https://docs.google.com/document/d/1U1RGAehQwRypUTovF1KRlpiOFze0b-_2gc6fAH0KY0k/edit?pli=1#
+   */
+  function SourceMapConsumer(aSourceMap) {
+    var sourceMap = aSourceMap;
+    if (typeof aSourceMap === 'string') {
+      sourceMap = JSON.parse(aSourceMap.replace(/^\)\]\}'/, ''));
+    }
+
+    var version = util.getArg(sourceMap, 'version');
+    var sources = util.getArg(sourceMap, 'sources');
+    // Sass 3.3 leaves out the 'names' array, so we deviate from the spec (which
+    // requires the array) to play nice here.
+    var names = util.getArg(sourceMap, 'names', []);
+    var sourceRoot = util.getArg(sourceMap, 'sourceRoot', null);
+    var sourcesContent = util.getArg(sourceMap, 'sourcesContent', null);
+    var mappings = util.getArg(sourceMap, 'mappings');
+    var file = util.getArg(sourceMap, 'file', null);
+
+    // Once again, Sass deviates from the spec and supplies the version as a
+    // string rather than a number, so we use loose equality checking here.
+    if (version != this._version) {
+      throw new Error('Unsupported version: ' + version);
+    }
+
+    // Pass `true` below to allow duplicate names and sources. While source maps
+    // are intended to be compressed and deduplicated, the TypeScript compiler
+    // sometimes generates source maps with duplicates in them. See Github issue
+    // #72 and bugzil.la/889492.
+    this._names = ArraySet.fromArray(names, true);
+    this._sources = ArraySet.fromArray(sources, true);
+
+    this.sourceRoot = sourceRoot;
+    this.sourcesContent = sourcesContent;
+    this._mappings = mappings;
+    this.file = file;
+  }
+
+  /**
+   * Create a SourceMapConsumer from a SourceMapGenerator.
+   *
+   * @param SourceMapGenerator aSourceMap
+   *        The source map that will be consumed.
+   * @returns SourceMapConsumer
+   */
+  SourceMapConsumer.fromSourceMap =
+    function SourceMapConsumer_fromSourceMap(aSourceMap) {
+      var smc = Object.create(SourceMapConsumer.prototype);
+
+      smc._names = ArraySet.fromArray(aSourceMap._names.toArray(), true);
+      smc._sources = ArraySet.fromArray(aSourceMap._sources.toArray(), true);
+      smc.sourceRoot = aSourceMap._sourceRoot;
+      smc.sourcesContent = aSourceMap._generateSourcesContent(smc._sources.toArray(),
+                                                              smc.sourceRoot);
+      smc.file = aSourceMap._file;
+
+      smc.__generatedMappings = aSourceMap._mappings.slice()
+        .sort(util.compareByGeneratedPositions);
+      smc.__originalMappings = aSourceMap._mappings.slice()
+        .sort(util.compareByOriginalPositions);
+
+      return smc;
+    };
+
+  /**
+   * The version of the source mapping spec that we are consuming.
+   */
+  SourceMapConsumer.prototype._version = 3;
+
+  /**
+   * The list of original sources.
+   */
+  Object.defineProperty(SourceMapConsumer.prototype, 'sources', {
+    get: function () {
+      return this._sources.toArray().map(function (s) {
+        return this.sourceRoot ? util.join(this.sourceRoot, s) : s;
+      }, this);
+    }
+  });
+
+  // `__generatedMappings` and `__originalMappings` are arrays that hold the
+  // parsed mapping coordinates from the source map's "mappings" attribute. They
+  // are lazily instantiated, accessed via the `_generatedMappings` and
+  // `_originalMappings` getters respectively, and we only parse the mappings
+  // and create these arrays once queried for a source location. We jump through
+  // these hoops because there can be many thousands of mappings, and parsing
+  // them is expensive, so we only want to do it if we must.
+  //
+  // Each object in the arrays is of the form:
+  //
+  //     {
+  //       generatedLine: The line number in the generated code,
+  //       generatedColumn: The column number in the generated code,
+  //       source: The path to the original source file that generated this
+  //               chunk of code,
+  //       originalLine: The line number in the original source that
+  //                     corresponds to this chunk of generated code,
+  //       originalColumn: The column number in the original source that
+  //                       corresponds to this chunk of generated code,
+  //       name: The name of the original symbol which generated this chunk of
+  //             code.
+  //     }
+  //
+  // All properties except for `generatedLine` and `generatedColumn` can be
+  // `null`.
+  //
+  // `_generatedMappings` is ordered by the generated positions.
+  //
+  // `_originalMappings` is ordered by the original positions.
+
+  SourceMapConsumer.prototype.__generatedMappings = null;
+  Object.defineProperty(SourceMapConsumer.prototype, '_generatedMappings', {
+    get: function () {
+      if (!this.__generatedMappings) {
+        this.__generatedMappings = [];
+        this.__originalMappings = [];
+        this._parseMappings(this._mappings, this.sourceRoot);
+      }
+
+      return this.__generatedMappings;
+    }
+  });
+
+  SourceMapConsumer.prototype.__originalMappings = null;
+  Object.defineProperty(SourceMapConsumer.prototype, '_originalMappings', {
+    get: function () {
+      if (!this.__originalMappings) {
+        this.__generatedMappings = [];
+        this.__originalMappings = [];
+        this._parseMappings(this._mappings, this.sourceRoot);
+      }
+
+      return this.__originalMappings;
+    }
+  });
+
+  /**
+   * Parse the mappings in a string in to a data structure which we can easily
+   * query (the ordered arrays in the `this.__generatedMappings` and
+   * `this.__originalMappings` properties).
+   */
+  SourceMapConsumer.prototype._parseMappings =
+    function SourceMapConsumer_parseMappings(aStr, aSourceRoot) {
+      var generatedLine = 1;
+      var previousGeneratedColumn = 0;
+      var previousOriginalLine = 0;
+      var previousOriginalColumn = 0;
+      var previousSource = 0;
+      var previousName = 0;
+      var mappingSeparator = /^[,;]/;
+      var str = aStr;
+      var mapping;
+      var temp;
+
+      while (str.length > 0) {
+        if (str.charAt(0) === ';') {
+          generatedLine++;
+          str = str.slice(1);
+          previousGeneratedColumn = 0;
+        }
+        else if (str.charAt(0) === ',') {
+          str = str.slice(1);
+        }
+        else {
+          mapping = {};
+          mapping.generatedLine = generatedLine;
+
+          // Generated column.
+          temp = base64VLQ.decode(str);
+          mapping.generatedColumn = previousGeneratedColumn + temp.value;
+          previousGeneratedColumn = mapping.generatedColumn;
+          str = temp.rest;
+
+          if (str.length > 0 && !mappingSeparator.test(str.charAt(0))) {
+            // Original source.
+            temp = base64VLQ.decode(str);
+            mapping.source = this._sources.at(previousSource + temp.value);
+            previousSource += temp.value;
+            str = temp.rest;
+            if (str.length === 0 || mappingSeparator.test(str.charAt(0))) {
+              throw new Error('Found a source, but no line and column');
+            }
+
+            // Original line.
+            temp = base64VLQ.decode(str);
+            mapping.originalLine = previousOriginalLine + temp.value;
+            previousOriginalLine = mapping.originalLine;
+            // Lines are stored 0-based
+            mapping.originalLine += 1;
+            str = temp.rest;
+            if (str.length === 0 || mappingSeparator.test(str.charAt(0))) {
+              throw new Error('Found a source and line, but no column');
+            }
+
+            // Original column.
+            temp = base64VLQ.decode(str);
+            mapping.originalColumn = previousOriginalColumn + temp.value;
+            previousOriginalColumn = mapping.originalColumn;
+            str = temp.rest;
+
+            if (str.length > 0 && !mappingSeparator.test(str.charAt(0))) {
+              // Original name.
+              temp = base64VLQ.decode(str);
+              mapping.name = this._names.at(previousName + temp.value);
+              previousName += temp.value;
+              str = temp.rest;
+            }
+          }
+
+          this.__generatedMappings.push(mapping);
+          if (typeof mapping.originalLine === 'number') {
+            this.__originalMappings.push(mapping);
+          }
+        }
+      }
+
+      this.__originalMappings.sort(util.compareByOriginalPositions);
+    };
+
+  /**
+   * Find the mapping that best matches the hypothetical "needle" mapping that
+   * we are searching for in the given "haystack" of mappings.
+   */
+  SourceMapConsumer.prototype._findMapping =
+    function SourceMapConsumer_findMapping(aNeedle, aMappings, aLineName,
+                                           aColumnName, aComparator) {
+      // To return the position we are searching for, we must first find the
+      // mapping for the given position and then return the opposite position it
+      // points to. Because the mappings are sorted, we can use binary search to
+      // find the best mapping.
+
+      if (aNeedle[aLineName] <= 0) {
+        throw new TypeError('Line must be greater than or equal to 1, got '
+                            + aNeedle[aLineName]);
+      }
+      if (aNeedle[aColumnName] < 0) {
+        throw new TypeError('Column must be greater than or equal to 0, got '
+                            + aNeedle[aColumnName]);
+      }
+
+      return binarySearch.search(aNeedle, aMappings, aComparator);
+    };
+
+  /**
+   * Returns the original source, line, and column information for the generated
+   * source's line and column positions provided. The only argument is an object
+   * with the following properties:
+   *
+   *   - line: The line number in the generated source.
+   *   - column: The column number in the generated source.
+   *
+   * and an object is returned with the following properties:
+   *
+   *   - source: The original source file, or null.
+   *   - line: The line number in the original source, or null.
+   *   - column: The column number in the original source, or null.
+   *   - name: The original identifier, or null.
+   */
+  SourceMapConsumer.prototype.originalPositionFor =
+    function SourceMapConsumer_originalPositionFor(aArgs) {
+      var needle = {
+        generatedLine: util.getArg(aArgs, 'line'),
+        generatedColumn: util.getArg(aArgs, 'column')
+      };
+
+      var mapping = this._findMapping(needle,
+                                      this._generatedMappings,
+                                      "generatedLine",
+                                      "generatedColumn",
+                                      util.compareByGeneratedPositions);
+
+      if (mapping) {
+        var source = util.getArg(mapping, 'source', null);
+        if (source && this.sourceRoot) {
+          source = util.join(this.sourceRoot, source);
+        }
+        return {
+          source: source,
+          line: util.getArg(mapping, 'originalLine', null),
+          column: util.getArg(mapping, 'originalColumn', null),
+          name: util.getArg(mapping, 'name', null)
+        };
+      }
+
+      return {
+        source: null,
+        line: null,
+        column: null,
+        name: null
+      };
+    };
+
+  /**
+   * Returns the original source content. The only argument is the url of the
+   * original source file. Returns null if no original source content is
+   * availible.
+   */
+  SourceMapConsumer.prototype.sourceContentFor =
+    function SourceMapConsumer_sourceContentFor(aSource) {
+      if (!this.sourcesContent) {
+        return null;
+      }
+
+      if (this.sourceRoot) {
+        aSource = util.relative(this.sourceRoot, aSource);
+      }
+
+      if (this._sources.has(aSource)) {
+        return this.sourcesContent[this._sources.indexOf(aSource)];
+      }
+
+      var url;
+      if (this.sourceRoot
+          && (url = util.urlParse(this.sourceRoot))) {
+        // XXX: file:// URIs and absolute paths lead to unexpected behavior for
+        // many users. We can help them out when they expect file:// URIs to
+        // behave like it would if they were running a local HTTP server. See
+        // https://bugzilla.mozilla.org/show_bug.cgi?id=885597.
+        var fileUriAbsPath = aSource.replace(/^file:\/\//, "");
+        if (url.scheme == "file"
+            && this._sources.has(fileUriAbsPath)) {
+          return this.sourcesContent[this._sources.indexOf(fileUriAbsPath)]
+        }
+
+        if ((!url.path || url.path == "/")
+            && this._sources.has("/" + aSource)) {
+          return this.sourcesContent[this._sources.indexOf("/" + aSource)];
+        }
+      }
+
+      throw new Error('"' + aSource + '" is not in the SourceMap.');
+    };
+
+  /**
+   * Returns the generated line and column information for the original source,
+   * line, and column positions provided. The only argument is an object with
+   * the following properties:
+   *
+   *   - source: The filename of the original source.
+   *   - line: The line number in the original source.
+   *   - column: The column number in the original source.
+   *
+   * and an object is returned with the following properties:
+   *
+   *   - line: The line number in the generated source, or null.
+   *   - column: The column number in the generated source, or null.
+   */
+  SourceMapConsumer.prototype.generatedPositionFor =
+    function SourceMapConsumer_generatedPositionFor(aArgs) {
+      var needle = {
+        source: util.getArg(aArgs, 'source'),
+        originalLine: util.getArg(aArgs, 'line'),
+        originalColumn: util.getArg(aArgs, 'column')
+      };
+
+      if (this.sourceRoot) {
+        needle.source = util.relative(this.sourceRoot, needle.source);
+      }
+
+      var mapping = this._findMapping(needle,
+                                      this._originalMappings,
+                                      "originalLine",
+                                      "originalColumn",
+                                      util.compareByOriginalPositions);
+
+      if (mapping) {
+        return {
+          line: util.getArg(mapping, 'generatedLine', null),
+          column: util.getArg(mapping, 'generatedColumn', null)
+        };
+      }
+
+      return {
+        line: null,
+        column: null
+      };
+    };
+
+  SourceMapConsumer.GENERATED_ORDER = 1;
+  SourceMapConsumer.ORIGINAL_ORDER = 2;
+
+  /**
+   * Iterate over each mapping between an original source/line/column and a
+   * generated line/column in this source map.
+   *
+   * @param Function aCallback
+   *        The function that is called with each mapping.
+   * @param Object aContext
+   *        Optional. If specified, this object will be the value of `this` every
+   *        time that `aCallback` is called.
+   * @param aOrder
+   *        Either `SourceMapConsumer.GENERATED_ORDER` or
+   *        `SourceMapConsumer.ORIGINAL_ORDER`. Specifies whether you want to
+   *        iterate over the mappings sorted by the generated file's line/column
+   *        order or the original's source/line/column order, respectively. Defaults to
+   *        `SourceMapConsumer.GENERATED_ORDER`.
+   */
+  SourceMapConsumer.prototype.eachMapping =
+    function SourceMapConsumer_eachMapping(aCallback, aContext, aOrder) {
+      var context = aContext || null;
+      var order = aOrder || SourceMapConsumer.GENERATED_ORDER;
+
+      var mappings;
+      switch (order) {
+      case SourceMapConsumer.GENERATED_ORDER:
+        mappings = this._generatedMappings;
+        break;
+      case SourceMapConsumer.ORIGINAL_ORDER:
+        mappings = this._originalMappings;
+        break;
+      default:
+        throw new Error("Unknown order of iteration.");
+      }
+
+      var sourceRoot = this.sourceRoot;
+      mappings.map(function (mapping) {
+        var source = mapping.source;
+        if (source && sourceRoot) {
+          source = util.join(sourceRoot, source);
+        }
+        return {
+          source: source,
+          generatedLine: mapping.generatedLine,
+          generatedColumn: mapping.generatedColumn,
+          originalLine: mapping.originalLine,
+          originalColumn: mapping.originalColumn,
+          name: mapping.name
+        };
+      }).forEach(aCallback, context);
+    };
+
+  exports.SourceMapConsumer = SourceMapConsumer;
+
+});
+
+},{"./array-set":9,"./base64-vlq":10,"./binary-search":12,"./util":16,"amdefine":17}],14:[function(_dereq_,module,exports){
+/* -*- Mode: js; js-indent-level: 2; -*- */
+/*
+ * Copyright 2011 Mozilla Foundation and contributors
+ * Licensed under the New BSD license. See LICENSE or:
+ * http://opensource.org/licenses/BSD-3-Clause
+ */
+if (typeof define !== 'function') {
+    var define = _dereq_('amdefine')(module, _dereq_);
+}
+define(function (_dereq_, exports, module) {
+
+  var base64VLQ = _dereq_('./base64-vlq');
+  var util = _dereq_('./util');
+  var ArraySet = _dereq_('./array-set').ArraySet;
+
+  /**
+   * An instance of the SourceMapGenerator represents a source map which is
+   * being built incrementally. To create a new one, you must pass an object
+   * with the following properties:
+   *
+   *   - file: The filename of the generated source.
+   *   - sourceRoot: An optional root for all URLs in this source map.
+   */
+  function SourceMapGenerator(aArgs) {
+    this._file = util.getArg(aArgs, 'file');
+    this._sourceRoot = util.getArg(aArgs, 'sourceRoot', null);
+    this._sources = new ArraySet();
+    this._names = new ArraySet();
+    this._mappings = [];
+    this._sourcesContents = null;
+  }
+
+  SourceMapGenerator.prototype._version = 3;
+
+  /**
+   * Creates a new SourceMapGenerator based on a SourceMapConsumer
+   *
+   * @param aSourceMapConsumer The SourceMap.
+   */
+  SourceMapGenerator.fromSourceMap =
+    function SourceMapGenerator_fromSourceMap(aSourceMapConsumer) {
+      var sourceRoot = aSourceMapConsumer.sourceRoot;
+      var generator = new SourceMapGenerator({
+        file: aSourceMapConsumer.file,
+        sourceRoot: sourceRoot
+      });
+      aSourceMapConsumer.eachMapping(function (mapping) {
+        var newMapping = {
+          generated: {
+            line: mapping.generatedLine,
+            column: mapping.generatedColumn
+          }
+        };
+
+        if (mapping.source) {
+          newMapping.source = mapping.source;
+          if (sourceRoot) {
+            newMapping.source = util.relative(sourceRoot, newMapping.source);
+          }
+
+          newMapping.original = {
+            line: mapping.originalLine,
+            column: mapping.originalColumn
+          };
+
+          if (mapping.name) {
+            newMapping.name = mapping.name;
+          }
+        }
+
+        generator.addMapping(newMapping);
+      });
+      aSourceMapConsumer.sources.forEach(function (sourceFile) {
+        var content = aSourceMapConsumer.sourceContentFor(sourceFile);
+        if (content) {
+          generator.setSourceContent(sourceFile, content);
+        }
+      });
+      return generator;
+    };
+
+  /**
+   * Add a single mapping from original source line and column to the generated
+   * source's line and column for this source map being created. The mapping
+   * object should have the following properties:
+   *
+   *   - generated: An object with the generated line and column positions.
+   *   - original: An object with the original line and column positions.
+   *   - source: The original source file (relative to the sourceRoot).
+   *   - name: An optional original token name for this mapping.
+   */
+  SourceMapGenerator.prototype.addMapping =
+    function SourceMapGenerator_addMapping(aArgs) {
+      var generated = util.getArg(aArgs, 'generated');
+      var original = util.getArg(aArgs, 'original', null);
+      var source = util.getArg(aArgs, 'source', null);
+      var name = util.getArg(aArgs, 'name', null);
+
+      this._validateMapping(generated, original, source, name);
+
+      if (source && !this._sources.has(source)) {
+        this._sources.add(source);
+      }
+
+      if (name && !this._names.has(name)) {
+        this._names.add(name);
+      }
+
+      this._mappings.push({
+        generatedLine: generated.line,
+        generatedColumn: generated.column,
+        originalLine: original != null && original.line,
+        originalColumn: original != null && original.column,
+        source: source,
+        name: name
+      });
+    };
+
+  /**
+   * Set the source content for a source file.
+   */
+  SourceMapGenerator.prototype.setSourceContent =
+    function SourceMapGenerator_setSourceContent(aSourceFile, aSourceContent) {
+      var source = aSourceFile;
+      if (this._sourceRoot) {
+        source = util.relative(this._sourceRoot, source);
+      }
+
+      if (aSourceContent !== null) {
+        // Add the source content to the _sourcesContents map.
+        // Create a new _sourcesContents map if the property is null.
+        if (!this._sourcesContents) {
+          this._sourcesContents = {};
+        }
+        this._sourcesContents[util.toSetString(source)] = aSourceContent;
+      } else {
+        // Remove the source file from the _sourcesContents map.
+        // If the _sourcesContents map is empty, set the property to null.
+        delete this._sourcesContents[util.toSetString(source)];
+        if (Object.keys(this._sourcesContents).length === 0) {
+          this._sourcesContents = null;
+        }
+      }
+    };
+
+  /**
+   * Applies the mappings of a sub-source-map for a specific source file to the
+   * source map being generated. Each mapping to the supplied source file is
+   * rewritten using the supplied source map. Note: The resolution for the
+   * resulting mappings is the minimium of this map and the supplied map.
+   *
+   * @param aSourceMapConsumer The source map to be applied.
+   * @param aSourceFile Optional. The filename of the source file.
+   *        If omitted, SourceMapConsumer's file property will be used.
+   */
+  SourceMapGenerator.prototype.applySourceMap =
+    function SourceMapGenerator_applySourceMap(aSourceMapConsumer, aSourceFile) {
+      // If aSourceFile is omitted, we will use the file property of the SourceMap
+      if (!aSourceFile) {
+        aSourceFile = aSourceMapConsumer.file;
+      }
+      var sourceRoot = this._sourceRoot;
+      // Make "aSourceFile" relative if an absolute Url is passed.
+      if (sourceRoot) {
+        aSourceFile = util.relative(sourceRoot, aSourceFile);
+      }
+      // Applying the SourceMap can add and remove items from the sources and
+      // the names array.
+      var newSources = new ArraySet();
+      var newNames = new ArraySet();
+
+      // Find mappings for the "aSourceFile"
+      this._mappings.forEach(function (mapping) {
+        if (mapping.source === aSourceFile && mapping.originalLine) {
+          // Check if it can be mapped by the source map, then update the mapping.
+          var original = aSourceMapConsumer.originalPositionFor({
+            line: mapping.originalLine,
+            column: mapping.originalColumn
+          });
+          if (original.source !== null) {
+            // Copy mapping
+            if (sourceRoot) {
+              mapping.source = util.relative(sourceRoot, original.source);
+            } else {
+              mapping.source = original.source;
+            }
+            mapping.originalLine = original.line;
+            mapping.originalColumn = original.column;
+            if (original.name !== null && mapping.name !== null) {
+              // Only use the identifier name if it's an identifier
+              // in both SourceMaps
+              mapping.name = original.name;
+            }
+          }
+        }
+
+        var source = mapping.source;
+        if (source && !newSources.has(source)) {
+          newSources.add(source);
+        }
+
+        var name = mapping.name;
+        if (name && !newNames.has(name)) {
+          newNames.add(name);
+        }
+
+      }, this);
+      this._sources = newSources;
+      this._names = newNames;
+
+      // Copy sourcesContents of applied map.
+      aSourceMapConsumer.sources.forEach(function (sourceFile) {
+        var content = aSourceMapConsumer.sourceContentFor(sourceFile);
+        if (content) {
+          if (sourceRoot) {
+            sourceFile = util.relative(sourceRoot, sourceFile);
+          }
+          this.setSourceContent(sourceFile, content);
+        }
+      }, this);
+    };
+
+  /**
+   * A mapping can have one of the three levels of data:
+   *
+   *   1. Just the generated position.
+   *   2. The Generated position, original position, and original source.
+   *   3. Generated and original position, original source, as well as a name
+   *      token.
+   *
+   * To maintain consistency, we validate that any new mapping being added falls
+   * in to one of these categories.
+   */
+  SourceMapGenerator.prototype._validateMapping =
+    function SourceMapGenerator_validateMapping(aGenerated, aOriginal, aSource,
+                                                aName) {
+      if (aGenerated && 'line' in aGenerated && 'column' in aGenerated
+          && aGenerated.line > 0 && aGenerated.column >= 0
+          && !aOriginal && !aSource && !aName) {
+        // Case 1.
+        return;
+      }
+      else if (aGenerated && 'line' in aGenerated && 'column' in aGenerated
+               && aOriginal && 'line' in aOriginal && 'column' in aOriginal
+               && aGenerated.line > 0 && aGenerated.column >= 0
+               && aOriginal.line > 0 && aOriginal.column >= 0
+               && aSource) {
+        // Cases 2 and 3.
+        return;
+      }
+      else {
+        throw new Error('Invalid mapping: ' + JSON.stringify({
+          generated: aGenerated,
+          source: aSource,
+          orginal: aOriginal,
+          name: aName
+        }));
+      }
+    };
+
+  /**
+   * Serialize the accumulated mappings in to the stream of base 64 VLQs
+   * specified by the source map format.
+   */
+  SourceMapGenerator.prototype._serializeMappings =
+    function SourceMapGenerator_serializeMappings() {
+      var previousGeneratedColumn = 0;
+      var previousGeneratedLine = 1;
+      var previousOriginalColumn = 0;
+      var previousOriginalLine = 0;
+      var previousName = 0;
+      var previousSource = 0;
+      var result = '';
+      var mapping;
+
+      // The mappings must be guaranteed to be in sorted order before we start
+      // serializing them or else the generated line numbers (which are defined
+      // via the ';' separators) will be all messed up. Note: it might be more
+      // performant to maintain the sorting as we insert them, rather than as we
+      // serialize them, but the big O is the same either way.
+      this._mappings.sort(util.compareByGeneratedPositions);
+
+      for (var i = 0, len = this._mappings.length; i < len; i++) {
+        mapping = this._mappings[i];
+
+        if (mapping.generatedLine !== previousGeneratedLine) {
+          previousGeneratedColumn = 0;
+          while (mapping.generatedLine !== previousGeneratedLine) {
+            result += ';';
+            previousGeneratedLine++;
+          }
+        }
+        else {
+          if (i > 0) {
+            if (!util.compareByGeneratedPositions(mapping, this._mappings[i - 1])) {
+              continue;
+            }
+            result += ',';
+          }
+        }
+
+        result += base64VLQ.encode(mapping.generatedColumn
+                                   - previousGeneratedColumn);
+        previousGeneratedColumn = mapping.generatedColumn;
+
+        if (mapping.source) {
+          result += base64VLQ.encode(this._sources.indexOf(mapping.source)
+                                     - previousSource);
+          previousSource = this._sources.indexOf(mapping.source);
+
+          // lines are stored 0-based in SourceMap spec version 3
+          result += base64VLQ.encode(mapping.originalLine - 1
+                                     - previousOriginalLine);
+          previousOriginalLine = mapping.originalLine - 1;
+
+          result += base64VLQ.encode(mapping.originalColumn
+                                     - previousOriginalColumn);
+          previousOriginalColumn = mapping.originalColumn;
+
+          if (mapping.name) {
+            result += base64VLQ.encode(this._names.indexOf(mapping.name)
+                                       - previousName);
+            previousName = this._names.indexOf(mapping.name);
+          }
+        }
+      }
+
+      return result;
+    };
+
+  SourceMapGenerator.prototype._generateSourcesContent =
+    function SourceMapGenerator_generateSourcesContent(aSources, aSourceRoot) {
+      return aSources.map(function (source) {
+        if (!this._sourcesContents) {
+          return null;
+        }
+        if (aSourceRoot) {
+          source = util.relative(aSourceRoot, source);
+        }
+        var key = util.toSetString(source);
+        return Object.prototype.hasOwnProperty.call(this._sourcesContents,
+                                                    key)
+          ? this._sourcesContents[key]
+          : null;
+      }, this);
+    };
+
+  /**
+   * Externalize the source map.
+   */
+  SourceMapGenerator.prototype.toJSON =
+    function SourceMapGenerator_toJSON() {
+      var map = {
+        version: this._version,
+        file: this._file,
+        sources: this._sources.toArray(),
+        names: this._names.toArray(),
+        mappings: this._serializeMappings()
+      };
+      if (this._sourceRoot) {
+        map.sourceRoot = this._sourceRoot;
+      }
+      if (this._sourcesContents) {
+        map.sourcesContent = this._generateSourcesContent(map.sources, map.sourceRoot);
+      }
+
+      return map;
+    };
+
+  /**
+   * Render the source map being generated to a string.
+   */
+  SourceMapGenerator.prototype.toString =
+    function SourceMapGenerator_toString() {
+      return JSON.stringify(this);
+    };
+
+  exports.SourceMapGenerator = SourceMapGenerator;
+
+});
+
+},{"./array-set":9,"./base64-vlq":10,"./util":16,"amdefine":17}],15:[function(_dereq_,module,exports){
+/* -*- Mode: js; js-indent-level: 2; -*- */
+/*
+ * Copyright 2011 Mozilla Foundation and contributors
+ * Licensed under the New BSD license. See LICENSE or:
+ * http://opensource.org/licenses/BSD-3-Clause
+ */
+if (typeof define !== 'function') {
+    var define = _dereq_('amdefine')(module, _dereq_);
+}
+define(function (_dereq_, exports, module) {
+
+  var SourceMapGenerator = _dereq_('./source-map-generator').SourceMapGenerator;
+  var util = _dereq_('./util');
+
+  /**
+   * SourceNodes provide a way to abstract over interpolating/concatenating
+   * snippets of generated JavaScript source code while maintaining the line and
+   * column information associated with the original source code.
+   *
+   * @param aLine The original line number.
+   * @param aColumn The original column number.
+   * @param aSource The original source's filename.
+   * @param aChunks Optional. An array of strings which are snippets of
+   *        generated JS, or other SourceNodes.
+   * @param aName The original identifier.
+   */
+  function SourceNode(aLine, aColumn, aSource, aChunks, aName) {
+    this.children = [];
+    this.sourceContents = {};
+    this.line = aLine === undefined ? null : aLine;
+    this.column = aColumn === undefined ? null : aColumn;
+    this.source = aSource === undefined ? null : aSource;
+    this.name = aName === undefined ? null : aName;
+    if (aChunks != null) this.add(aChunks);
+  }
+
+  /**
+   * Creates a SourceNode from generated code and a SourceMapConsumer.
+   *
+   * @param aGeneratedCode The generated code
+   * @param aSourceMapConsumer The SourceMap for the generated code
+   */
+  SourceNode.fromStringWithSourceMap =
+    function SourceNode_fromStringWithSourceMap(aGeneratedCode, aSourceMapConsumer) {
+      // The SourceNode we want to fill with the generated code
+      // and the SourceMap
+      var node = new SourceNode();
+
+      // The generated code
+      // Processed fragments are removed from this array.
+      var remainingLines = aGeneratedCode.split('\n');
+
+      // We need to remember the position of "remainingLines"
+      var lastGeneratedLine = 1, lastGeneratedColumn = 0;
+
+      // The generate SourceNodes we need a code range.
+      // To extract it current and last mapping is used.
+      // Here we store the last mapping.
+      var lastMapping = null;
+
+      aSourceMapConsumer.eachMapping(function (mapping) {
+        if (lastMapping === null) {
+          // We add the generated code until the first mapping
+          // to the SourceNode without any mapping.
+          // Each line is added as separate string.
+          while (lastGeneratedLine < mapping.generatedLine) {
+            node.add(remainingLines.shift() + "\n");
+            lastGeneratedLine++;
+          }
+          if (lastGeneratedColumn < mapping.generatedColumn) {
+            var nextLine = remainingLines[0];
+            node.add(nextLine.substr(0, mapping.generatedColumn));
+            remainingLines[0] = nextLine.substr(mapping.generatedColumn);
+            lastGeneratedColumn = mapping.generatedColumn;
+          }
+        } else {
+          // We add the code from "lastMapping" to "mapping":
+          // First check if there is a new line in between.
+          if (lastGeneratedLine < mapping.generatedLine) {
+            var code = "";
+            // Associate full lines with "lastMapping"
+            do {
+              code += remainingLines.shift() + "\n";
+              lastGeneratedLine++;
+              lastGeneratedColumn = 0;
+            } while (lastGeneratedLine < mapping.generatedLine);
+            // When we reached the correct line, we add code until we
+            // reach the correct column too.
+            if (lastGeneratedColumn < mapping.generatedColumn) {
+              var nextLine = remainingLines[0];
+              code += nextLine.substr(0, mapping.generatedColumn);
+              remainingLines[0] = nextLine.substr(mapping.generatedColumn);
+              lastGeneratedColumn = mapping.generatedColumn;
+            }
+            // Create the SourceNode.
+            addMappingWithCode(lastMapping, code);
+          } else {
+            // There is no new line in between.
+            // Associate the code between "lastGeneratedColumn" and
+            // "mapping.generatedColumn" with "lastMapping"
+            var nextLine = remainingLines[0];
+            var code = nextLine.substr(0, mapping.generatedColumn -
+                                          lastGeneratedColumn);
+            remainingLines[0] = nextLine.substr(mapping.generatedColumn -
+                                                lastGeneratedColumn);
+            lastGeneratedColumn = mapping.generatedColumn;
+            addMappingWithCode(lastMapping, code);
+          }
+        }
+        lastMapping = mapping;
+      }, this);
+      // We have processed all mappings.
+      // Associate the remaining code in the current line with "lastMapping"
+      // and add the remaining lines without any mapping
+      addMappingWithCode(lastMapping, remainingLines.join("\n"));
+
+      // Copy sourcesContent into SourceNode
+      aSourceMapConsumer.sources.forEach(function (sourceFile) {
+        var content = aSourceMapConsumer.sourceContentFor(sourceFile);
+        if (content) {
+          node.setSourceContent(sourceFile, content);
+        }
+      });
+
+      return node;
+
+      function addMappingWithCode(mapping, code) {
+        if (mapping === null || mapping.source === undefined) {
+          node.add(code);
+        } else {
+          node.add(new SourceNode(mapping.originalLine,
+                                  mapping.originalColumn,
+                                  mapping.source,
+                                  code,
+                                  mapping.name));
+        }
+      }
+    };
+
+  /**
+   * Add a chunk of generated JS to this source node.
+   *
+   * @param aChunk A string snippet of generated JS code, another instance of
+   *        SourceNode, or an array where each member is one of those things.
+   */
+  SourceNode.prototype.add = function SourceNode_add(aChunk) {
+    if (Array.isArray(aChunk)) {
+      aChunk.forEach(function (chunk) {
+        this.add(chunk);
+      }, this);
+    }
+    else if (aChunk instanceof SourceNode || typeof aChunk === "string") {
+      if (aChunk) {
+        this.children.push(aChunk);
+      }
+    }
+    else {
+      throw new TypeError(
+        "Expected a SourceNode, string, or an array of SourceNodes and strings. Got " + aChunk
+      );
+    }
+    return this;
+  };
+
+  /**
+   * Add a chunk of generated JS to the beginning of this source node.
+   *
+   * @param aChunk A string snippet of generated JS code, another instance of
+   *        SourceNode, or an array where each member is one of those things.
+   */
+  SourceNode.prototype.prepend = function SourceNode_prepend(aChunk) {
+    if (Array.isArray(aChunk)) {
+      for (var i = aChunk.length-1; i >= 0; i--) {
+        this.prepend(aChunk[i]);
+      }
+    }
+    else if (aChunk instanceof SourceNode || typeof aChunk === "string") {
+      this.children.unshift(aChunk);
+    }
+    else {
+      throw new TypeError(
+        "Expected a SourceNode, string, or an array of SourceNodes and strings. Got " + aChunk
+      );
+    }
+    return this;
+  };
+
+  /**
+   * Walk over the tree of JS snippets in this node and its children. The
+   * walking function is called once for each snippet of JS and is passed that
+   * snippet and the its original associated source's line/column location.
+   *
+   * @param aFn The traversal function.
+   */
+  SourceNode.prototype.walk = function SourceNode_walk(aFn) {
+    var chunk;
+    for (var i = 0, len = this.children.length; i < len; i++) {
+      chunk = this.children[i];
+      if (chunk instanceof SourceNode) {
+        chunk.walk(aFn);
+      }
+      else {
+        if (chunk !== '') {
+          aFn(chunk, { source: this.source,
+                       line: this.line,
+                       column: this.column,
+                       name: this.name });
+        }
+      }
+    }
+  };
+
+  /**
+   * Like `String.prototype.join` except for SourceNodes. Inserts `aStr` between
+   * each of `this.children`.
+   *
+   * @param aSep The separator.
+   */
+  SourceNode.prototype.join = function SourceNode_join(aSep) {
+    var newChildren;
+    var i;
+    var len = this.children.length;
+    if (len > 0) {
+      newChildren = [];
+      for (i = 0; i < len-1; i++) {
+        newChildren.push(this.children[i]);
+        newChildren.push(aSep);
+      }
+      newChildren.push(this.children[i]);
+      this.children = newChildren;
+    }
+    return this;
+  };
+
+  /**
+   * Call String.prototype.replace on the very right-most source snippet. Useful
+   * for trimming whitespace from the end of a source node, etc.
+   *
+   * @param aPattern The pattern to replace.
+   * @param aReplacement The thing to replace the pattern with.
+   */
+  SourceNode.prototype.replaceRight = function SourceNode_replaceRight(aPattern, aReplacement) {
+    var lastChild = this.children[this.children.length - 1];
+    if (lastChild instanceof SourceNode) {
+      lastChild.replaceRight(aPattern, aReplacement);
+    }
+    else if (typeof lastChild === 'string') {
+      this.children[this.children.length - 1] = lastChild.replace(aPattern, aReplacement);
+    }
+    else {
+      this.children.push(''.replace(aPattern, aReplacement));
+    }
+    return this;
+  };
+
+  /**
+   * Set the source content for a source file. This will be added to the SourceMapGenerator
+   * in the sourcesContent field.
+   *
+   * @param aSourceFile The filename of the source file
+   * @param aSourceContent The content of the source file
+   */
+  SourceNode.prototype.setSourceContent =
+    function SourceNode_setSourceContent(aSourceFile, aSourceContent) {
+      this.sourceContents[util.toSetString(aSourceFile)] = aSourceContent;
+    };
+
+  /**
+   * Walk over the tree of SourceNodes. The walking function is called for each
+   * source file content and is passed the filename and source content.
+   *
+   * @param aFn The traversal function.
+   */
+  SourceNode.prototype.walkSourceContents =
+    function SourceNode_walkSourceContents(aFn) {
+      for (var i = 0, len = this.children.length; i < len; i++) {
+        if (this.children[i] instanceof SourceNode) {
+          this.children[i].walkSourceContents(aFn);
+        }
+      }
+
+      var sources = Object.keys(this.sourceContents);
+      for (var i = 0, len = sources.length; i < len; i++) {
+        aFn(util.fromSetString(sources[i]), this.sourceContents[sources[i]]);
+      }
+    };
+
+  /**
+   * Return the string representation of this source node. Walks over the tree
+   * and concatenates all the various snippets together to one string.
+   */
+  SourceNode.prototype.toString = function SourceNode_toString() {
+    var str = "";
+    this.walk(function (chunk) {
+      str += chunk;
+    });
+    return str;
+  };
+
+  /**
+   * Returns the string representation of this source node along with a source
+   * map.
+   */
+  SourceNode.prototype.toStringWithSourceMap = function SourceNode_toStringWithSourceMap(aArgs) {
+    var generated = {
+      code: "",
+      line: 1,
+      column: 0
+    };
+    var map = new SourceMapGenerator(aArgs);
+    var sourceMappingActive = false;
+    var lastOriginalSource = null;
+    var lastOriginalLine = null;
+    var lastOriginalColumn = null;
+    var lastOriginalName = null;
+    this.walk(function (chunk, original) {
+      generated.code += chunk;
+      if (original.source !== null
+          && original.line !== null
+          && original.column !== null) {
+        if(lastOriginalSource !== original.source
+           || lastOriginalLine !== original.line
+           || lastOriginalColumn !== original.column
+           || lastOriginalName !== original.name) {
+          map.addMapping({
+            source: original.source,
+            original: {
+              line: original.line,
+              column: original.column
+            },
+            generated: {
+              line: generated.line,
+              column: generated.column
+            },
+            name: original.name
+          });
+        }
+        lastOriginalSource = original.source;
+        lastOriginalLine = original.line;
+        lastOriginalColumn = original.column;
+        lastOriginalName = original.name;
+        sourceMappingActive = true;
+      } else if (sourceMappingActive) {
+        map.addMapping({
+          generated: {
+            line: generated.line,
+            column: generated.column
+          }
+        });
+        lastOriginalSource = null;
+        sourceMappingActive = false;
+      }
+      chunk.split('').forEach(function (ch) {
+        if (ch === '\n') {
+          generated.line++;
+          generated.column = 0;
+        } else {
+          generated.column++;
+        }
+      });
+    });
+    this.walkSourceContents(function (sourceFile, sourceContent) {
+      map.setSourceContent(sourceFile, sourceContent);
+    });
+
+    return { code: generated.code, map: map };
+  };
+
+  exports.SourceNode = SourceNode;
+
+});
+
+},{"./source-map-generator":14,"./util":16,"amdefine":17}],16:[function(_dereq_,module,exports){
+/* -*- Mode: js; js-indent-level: 2; -*- */
+/*
+ * Copyright 2011 Mozilla Foundation and contributors
+ * Licensed under the New BSD license. See LICENSE or:
+ * http://opensource.org/licenses/BSD-3-Clause
+ */
+if (typeof define !== 'function') {
+    var define = _dereq_('amdefine')(module, _dereq_);
+}
+define(function (_dereq_, exports, module) {
+
+  /**
+   * This is a helper function for getting values from parameter/options
+   * objects.
+   *
+   * @param args The object we are extracting values from
+   * @param name The name of the property we are getting.
+   * @param defaultValue An optional value to return if the property is missing
+   * from the object. If this is not specified and the property is missing, an
+   * error will be thrown.
+   */
+  function getArg(aArgs, aName, aDefaultValue) {
+    if (aName in aArgs) {
+      return aArgs[aName];
+    } else if (arguments.length === 3) {
+      return aDefaultValue;
+    } else {
+      throw new Error('"' + aName + '" is a required argument.');
+    }
+  }
+  exports.getArg = getArg;
+
+  var urlRegexp = /([\w+\-.]+):\/\/((\w+:\w+)@)?([\w.]+)?(:(\d+))?(\S+)?/;
+  var dataUrlRegexp = /^data:.+\,.+/;
+
+  function urlParse(aUrl) {
+    var match = aUrl.match(urlRegexp);
+    if (!match) {
+      return null;
+    }
+    return {
+      scheme: match[1],
+      auth: match[3],
+      host: match[4],
+      port: match[6],
+      path: match[7]
+    };
+  }
+  exports.urlParse = urlParse;
+
+  function urlGenerate(aParsedUrl) {
+    var url = aParsedUrl.scheme + "://";
+    if (aParsedUrl.auth) {
+      url += aParsedUrl.auth + "@"
+    }
+    if (aParsedUrl.host) {
+      url += aParsedUrl.host;
+    }
+    if (aParsedUrl.port) {
+      url += ":" + aParsedUrl.port
+    }
+    if (aParsedUrl.path) {
+      url += aParsedUrl.path;
+    }
+    return url;
+  }
+  exports.urlGenerate = urlGenerate;
+
+  function join(aRoot, aPath) {
+    var url;
+
+    if (aPath.match(urlRegexp) || aPath.match(dataUrlRegexp)) {
+      return aPath;
+    }
+
+    if (aPath.charAt(0) === '/' && (url = urlParse(aRoot))) {
+      url.path = aPath;
+      return urlGenerate(url);
+    }
+
+    return aRoot.replace(/\/$/, '') + '/' + aPath;
+  }
+  exports.join = join;
+
+  /**
+   * Because behavior goes wacky when you set `__proto__` on objects, we
+   * have to prefix all the strings in our set with an arbitrary character.
+   *
+   * See https://github.com/mozilla/source-map/pull/31 and
+   * https://github.com/mozilla/source-map/issues/30
+   *
+   * @param String aStr
+   */
+  function toSetString(aStr) {
+    return '$' + aStr;
+  }
+  exports.toSetString = toSetString;
+
+  function fromSetString(aStr) {
+    return aStr.substr(1);
+  }
+  exports.fromSetString = fromSetString;
+
+  function relative(aRoot, aPath) {
+    aRoot = aRoot.replace(/\/$/, '');
+
+    var url = urlParse(aRoot);
+    if (aPath.charAt(0) == "/" && url && url.path == "/") {
+      return aPath.slice(1);
+    }
+
+    return aPath.indexOf(aRoot + '/') === 0
+      ? aPath.substr(aRoot.length + 1)
+      : aPath;
+  }
+  exports.relative = relative;
+
+  function strcmp(aStr1, aStr2) {
+    var s1 = aStr1 || "";
+    var s2 = aStr2 || "";
+    return (s1 > s2) - (s1 < s2);
+  }
+
+  /**
+   * Comparator between two mappings where the original positions are compared.
+   *
+   * Optionally pass in `true` as `onlyCompareGenerated` to consider two
+   * mappings with the same original source/line/column, but different generated
+   * line and column the same. Useful when searching for a mapping with a
+   * stubbed out mapping.
+   */
+  function compareByOriginalPositions(mappingA, mappingB, onlyCompareOriginal) {
+    var cmp;
+
+    cmp = strcmp(mappingA.source, mappingB.source);
+    if (cmp) {
+      return cmp;
+    }
+
+    cmp = mappingA.originalLine - mappingB.originalLine;
+    if (cmp) {
+      return cmp;
+    }
+
+    cmp = mappingA.originalColumn - mappingB.originalColumn;
+    if (cmp || onlyCompareOriginal) {
+      return cmp;
+    }
+
+    cmp = strcmp(mappingA.name, mappingB.name);
+    if (cmp) {
+      return cmp;
+    }
+
+    cmp = mappingA.generatedLine - mappingB.generatedLine;
+    if (cmp) {
+      return cmp;
+    }
+
+    return mappingA.generatedColumn - mappingB.generatedColumn;
+  };
+  exports.compareByOriginalPositions = compareByOriginalPositions;
+
+  /**
+   * Comparator between two mappings where the generated positions are
+   * compared.
+   *
+   * Optionally pass in `true` as `onlyCompareGenerated` to consider two
+   * mappings with the same generated line and column, but different
+   * source/name/original line and column the same. Useful when searching for a
+   * mapping with a stubbed out mapping.
+   */
+  function compareByGeneratedPositions(mappingA, mappingB, onlyCompareGenerated) {
+    var cmp;
+
+    cmp = mappingA.generatedLine - mappingB.generatedLine;
+    if (cmp) {
+      return cmp;
+    }
+
+    cmp = mappingA.generatedColumn - mappingB.generatedColumn;
+    if (cmp || onlyCompareGenerated) {
+      return cmp;
+    }
+
+    cmp = strcmp(mappingA.source, mappingB.source);
+    if (cmp) {
+      return cmp;
+    }
+
+    cmp = mappingA.originalLine - mappingB.originalLine;
+    if (cmp) {
+      return cmp;
+    }
+
+    cmp = mappingA.originalColumn - mappingB.originalColumn;
+    if (cmp) {
+      return cmp;
+    }
+
+    return strcmp(mappingA.name, mappingB.name);
+  };
+  exports.compareByGeneratedPositions = compareByGeneratedPositions;
+
+});
+
+},{"amdefine":17}],17:[function(_dereq_,module,exports){
+(function (process,__filename){
+/** vim: et:ts=4:sw=4:sts=4
+ * @license amdefine 0.1.0 Copyright (c) 2011, The Dojo Foundation All Rights Reserved.
+ * Available via the MIT or new BSD license.
+ * see: http://github.com/jrburke/amdefine for details
+ */
+
+/*jslint node: true */
+/*global module, process */
+'use strict';
+
+/**
+ * Creates a define for node.
+ * @param {Object} module the "module" object that is defined by Node for the
+ * current module.
+ * @param {Function} [requireFn]. Node's require function for the current module.
+ * It only needs to be passed in Node versions before 0.5, when module.require
+ * did not exist.
+ * @returns {Function} a define function that is usable for the current node
+ * module.
+ */
+function amdefine(module, requireFn) {
+    'use strict';
+    var defineCache = {},
+        loaderCache = {},
+        alreadyCalled = false,
+        path = _dereq_('path'),
+        makeRequire, stringRequire;
+
+    /**
+     * Trims the . and .. from an array of path segments.
+     * It will keep a leading path segment if a .. will become
+     * the first path segment, to help with module name lookups,
+     * which act like paths, but can be remapped. But the end result,
+     * all paths that use this function should look normalized.
+     * NOTE: this method MODIFIES the input array.
+     * @param {Array} ary the array of path segments.
+     */
+    function trimDots(ary) {
+        var i, part;
+        for (i = 0; ary[i]; i+= 1) {
+            part = ary[i];
+            if (part === '.') {
+                ary.splice(i, 1);
+                i -= 1;
+            } else if (part === '..') {
+                if (i === 1 && (ary[2] === '..' || ary[0] === '..')) {
+                    //End of the line. Keep at least one non-dot
+                    //path segment at the front so it can be mapped
+                    //correctly to disk. Otherwise, there is likely
+                    //no path mapping for a path starting with '..'.
+                    //This can still fail, but catches the most reasonable
+                    //uses of ..
+                    break;
+                } else if (i > 0) {
+                    ary.splice(i - 1, 2);
+                    i -= 2;
+                }
+            }
+        }
+    }
+
+    function normalize(name, baseName) {
+        var baseParts;
+
+        //Adjust any relative paths.
+        if (name && name.charAt(0) === '.') {
+            //If have a base name, try to normalize against it,
+            //otherwise, assume it is a top-level require that will
+            //be relative to baseUrl in the end.
+            if (baseName) {
+                baseParts = baseName.split('/');
+                baseParts = baseParts.slice(0, baseParts.length - 1);
+                baseParts = baseParts.concat(name.split('/'));
+                trimDots(baseParts);
+                name = baseParts.join('/');
+            }
+        }
+
+        return name;
+    }
+
+    /**
+     * Create the normalize() function passed to a loader plugin's
+     * normalize method.
+     */
+    function makeNormalize(relName) {
+        return function (name) {
+            return normalize(name, relName);
+        };
+    }
+
+    function makeLoad(id) {
+        function load(value) {
+            loaderCache[id] = value;
+        }
+
+        load.fromText = function (id, text) {
+            //This one is difficult because the text can/probably uses
+            //define, and any relative paths and requires should be relative
+            //to that id was it would be found on disk. But this would require
+            //bootstrapping a module/require fairly deeply from node core.
+            //Not sure how best to go about that yet.
+            throw new Error('amdefine does not implement load.fromText');
+        };
+
+        return load;
+    }
+
+    makeRequire = function (systemRequire, exports, module, relId) {
+        function amdRequire(deps, callback) {
+            if (typeof deps === 'string') {
+                //Synchronous, single module require('')
+                return stringRequire(systemRequire, exports, module, deps, relId);
+            } else {
+                //Array of dependencies with a callback.
+
+                //Convert the dependencies to modules.
+                deps = deps.map(function (depName) {
+                    return stringRequire(systemRequire, exports, module, depName, relId);
+                });
+
+                //Wait for next tick to call back the require call.
+                process.nextTick(function () {
+                    callback.apply(null, deps);
+                });
+            }
+        }
+
+        amdRequire.toUrl = function (filePath) {
+            if (filePath.indexOf('.') === 0) {
+                return normalize(filePath, path.dirname(module.filename));
+            } else {
+                return filePath;
+            }
+        };
+
+        return amdRequire;
+    };
+
+    //Favor explicit value, passed in if the module wants to support Node 0.4.
+    requireFn = requireFn || function req() {
+        return module.require.apply(module, arguments);
+    };
+
+    function runFactory(id, deps, factory) {
+        var r, e, m, result;
+
+        if (id) {
+            e = loaderCache[id] = {};
+            m = {
+                id: id,
+                uri: __filename,
+                exports: e
+            };
+            r = makeRequire(requireFn, e, m, id);
+        } else {
+            //Only support one define call per file
+            if (alreadyCalled) {
+                throw new Error('amdefine with no module ID cannot be called more than once per file.');
+            }
+            alreadyCalled = true;
+
+            //Use the real variables from node
+            //Use module.exports for exports, since
+            //the exports in here is amdefine exports.
+            e = module.exports;
+            m = module;
+            r = makeRequire(requireFn, e, m, module.id);
+        }
+
+        //If there are dependencies, they are strings, so need
+        //to convert them to dependency values.
+        if (deps) {
+            deps = deps.map(function (depName) {
+                return r(depName);
+            });
+        }
+
+        //Call the factory with the right dependencies.
+        if (typeof factory === 'function') {
+            result = factory.apply(m.exports, deps);
+        } else {
+            result = factory;
+        }
+
+        if (result !== undefined) {
+            m.exports = result;
+            if (id) {
+                loaderCache[id] = m.exports;
+            }
+        }
+    }
+
+    stringRequire = function (systemRequire, exports, module, id, relId) {
+        //Split the ID by a ! so that
+        var index = id.indexOf('!'),
+            originalId = id,
+            prefix, plugin;
+
+        if (index === -1) {
+            id = normalize(id, relId);
+
+            //Straight module lookup. If it is one of the special dependencies,
+            //deal with it, otherwise, delegate to node.
+            if (id === 'require') {
+                return makeRequire(systemRequire, exports, module, relId);
+            } else if (id === 'exports') {
+                return exports;
+            } else if (id === 'module') {
+                return module;
+            } else if (loaderCache.hasOwnProperty(id)) {
+                return loaderCache[id];
+            } else if (defineCache[id]) {
+                runFactory.apply(null, defineCache[id]);
+                return loaderCache[id];
+            } else {
+                if(systemRequire) {
+                    return systemRequire(originalId);
+                } else {
+                    throw new Error('No module with ID: ' + id);
+                }
+            }
+        } else {
+            //There is a plugin in play.
+            prefix = id.substring(0, index);
+            id = id.substring(index + 1, id.length);
+
+            plugin = stringRequire(systemRequire, exports, module, prefix, relId);
+
+            if (plugin.normalize) {
+                id = plugin.normalize(id, makeNormalize(relId));
+            } else {
+                //Normalize the ID normally.
+                id = normalize(id, relId);
+            }
+
+            if (loaderCache[id]) {
+                return loaderCache[id];
+            } else {
+                plugin.load(id, makeRequire(systemRequire, exports, module, relId), makeLoad(id), {});
+
+                return loaderCache[id];
+            }
+        }
+    };
+
+    //Create a define function specific to the module asking for amdefine.
+    function define(id, deps, factory) {
+        if (Array.isArray(id)) {
+            factory = deps;
+            deps = id;
+            id = undefined;
+        } else if (typeof id !== 'string') {
+            factory = id;
+            id = deps = undefined;
+        }
+
+        if (deps && !Array.isArray(deps)) {
+            factory = deps;
+            deps = undefined;
+        }
+
+        if (!deps) {
+            deps = ['require', 'exports', 'module'];
+        }
+
+        //Set up properties for this module. If an ID, then use
+        //internal cache. If no ID, then use the external variables
+        //for this node module.
+        if (id) {
+            //Put the module in deep freeze until there is a
+            //require call for it.
+            defineCache[id] = [id, deps, factory];
+        } else {
+            runFactory(id, deps, factory);
+        }
+    }
+
+    //define.require, which has access to all the values in the
+    //cache. Useful for AMD modules that all have IDs in the file,
+    //but need to finally export a value to node based on one of those
+    //IDs.
+    define.require = function (id) {
+        if (loaderCache[id]) {
+            return loaderCache[id];
+        }
+
+        if (defineCache[id]) {
+            runFactory.apply(null, defineCache[id]);
+            return loaderCache[id];
+        }
+    };
+
+    define.amd = {};
+
+    return define;
+}
+
+module.exports = amdefine;
+
+}).call(this,_dereq_("FWaASH"),"/../node_modules/jstransform/node_modules/source-map/node_modules/amdefine/amdefine.js")
+},{"FWaASH":5,"path":4}],18:[function(_dereq_,module,exports){
+/**
+ * Copyright 2013 Facebook, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+var docblockRe = /^\s*(\/\*\*(.|\r?\n)*?\*\/)/;
+var ltrimRe = /^\s*/;
+/**
+ * @param {String} contents
+ * @return {String}
+ */
+function extract(contents) {
+  var match = contents.match(docblockRe);
+  if (match) {
+    return match[0].replace(ltrimRe, '') || '';
+  }
+  return '';
+}
+
+
+var commentStartRe = /^\/\*\*?/;
+var commentEndRe = /\*+\/$/;
+var wsRe = /[\t ]+/g;
+var stringStartRe = /(\r?\n|^) *\*/g;
+var multilineRe = /(?:^|\r?\n) *(@[^\r\n]*?) *\r?\n *([^@\r\n\s][^@\r\n]+?) *\r?\n/g;
+var propertyRe = /(?:^|\r?\n) *@(\S+) *([^\r\n]*)/g;
+
+/**
+ * @param {String} contents
+ * @return {Array}
+ */
+function parse(docblock) {
+  docblock = docblock
+    .replace(commentStartRe, '')
+    .replace(commentEndRe, '')
+    .replace(wsRe, ' ')
+    .replace(stringStartRe, '$1');
+
+  // Normalize multi-line directives
+  var prev = '';
+  while (prev != docblock) {
+    prev = docblock;
+    docblock = docblock.replace(multilineRe, "\n$1 $2\n");
+  }
+  docblock = docblock.trim();
+
+  var result = [];
+  var match;
+  while (match = propertyRe.exec(docblock)) {
+    result.push([match[1], match[2]]);
+  }
+
+  return result;
+}
+
+/**
+ * Same as parse but returns an object of prop: value instead of array of paris
+ * If a property appers more than once the last one will be returned
+ *
+ * @param {String} contents
+ * @return {Object}
+ */
+function parseAsObject(docblock) {
+  var pairs = parse(docblock);
+  var result = {};
+  for (var i = 0; i < pairs.length; i++) {
+    result[pairs[i][0]] = pairs[i][1];
+  }
+  return result;
+}
+
+
+exports.extract = extract;
+exports.parse = parse;
+exports.parseAsObject = parseAsObject;
+
+},{}],19:[function(_dereq_,module,exports){
+/**
+ * Copyright 2013 Facebook, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+/*jslint node: true*/
+"use strict";
+
+var esprima = _dereq_('esprima-fb');
+var utils = _dereq_('./utils');
+
+var getBoundaryNode = utils.getBoundaryNode;
+var declareIdentInScope = utils.declareIdentInLocalScope;
+var initScopeMetadata = utils.initScopeMetadata;
+var Syntax = esprima.Syntax;
+
+/**
+ * @param {object} node
+ * @param {object} parentNode
+ * @return {boolean}
+ */
+function _nodeIsClosureScopeBoundary(node, parentNode) {
+  if (node.type === Syntax.Program) {
+    return true;
+  }
+
+  var parentIsFunction =
+    parentNode.type === Syntax.FunctionDeclaration
+    || parentNode.type === Syntax.FunctionExpression
+    || parentNode.type === Syntax.ArrowFunctionExpression;
+
+  return node.type === Syntax.BlockStatement && parentIsFunction;
+}
+
+function _nodeIsBlockScopeBoundary(node, parentNode) {
+  if (node.type === Syntax.Program) {
+    return false;
+  }
+
+  return node.type === Syntax.BlockStatement
+         && parentNode.type === Syntax.CatchClause;
+}
+
+/**
+ * @param {object} node
+ * @param {function} visitor
+ * @param {array} path
+ * @param {object} state
+ */
+function traverse(node, path, state) {
+  // Create a scope stack entry if this is the first node we've encountered in
+  // its local scope
+  var parentNode = path[0];
+  if (!Array.isArray(node) && state.localScope.parentNode !== parentNode) {
+    if (_nodeIsClosureScopeBoundary(node, parentNode)) {
+      var scopeIsStrict =
+        state.scopeIsStrict
+        || node.body.length > 0
+           && node.body[0].type === Syntax.ExpressionStatement
+           && node.body[0].expression.type === Syntax.Literal
+           && node.body[0].expression.value === 'use strict';
+
+      if (node.type === Syntax.Program) {
+        state = utils.updateState(state, {
+          scopeIsStrict: scopeIsStrict
+        });
+      } else {
+        state = utils.updateState(state, {
+          localScope: {
+            parentNode: parentNode,
+            parentScope: state.localScope,
+            identifiers: {},
+            tempVarIndex: 0
+          },
+          scopeIsStrict: scopeIsStrict
+        });
+
+        // All functions have an implicit 'arguments' object in scope
+        declareIdentInScope('arguments', initScopeMetadata(node), state);
+
+        // Include function arg identifiers in the scope boundaries of the
+        // function
+        if (parentNode.params.length > 0) {
+          var param;
+          for (var i = 0; i < parentNode.params.length; i++) {
+            param = parentNode.params[i];
+            if (param.type === Syntax.Identifier) {
+              declareIdentInScope(
+                param.name, initScopeMetadata(parentNode), state
+              );
+            }
+          }
+        }
+
+        // Named FunctionExpressions scope their name within the body block of
+        // themselves only
+        if (parentNode.type === Syntax.FunctionExpression && parentNode.id) {
+          var metaData =
+            initScopeMetadata(parentNode, path.parentNodeslice, parentNode);
+          declareIdentInScope(parentNode.id.name, metaData, state);
+        }
+      }
+
+      // Traverse and find all local identifiers in this closure first to
+      // account for function/variable declaration hoisting
+      collectClosureIdentsAndTraverse(node, path, state);
+    }
+
+    if (_nodeIsBlockScopeBoundary(node, parentNode)) {
+      state = utils.updateState(state, {
+        localScope: {
+          parentNode: parentNode,
+          parentScope: state.localScope,
+          identifiers: {}
+        }
+      });
+
+      if (parentNode.type === Syntax.CatchClause) {
+        declareIdentInScope(
+          parentNode.param.name, initScopeMetadata(parentNode), state
+        );
+      }
+      collectBlockIdentsAndTraverse(node, path, state);
+    }
+  }
+
+  // Only catchup() before and after traversing a child node
+  function traverser(node, path, state) {
+    node.range && utils.catchup(node.range[0], state);
+    traverse(node, path, state);
+    node.range && utils.catchup(node.range[1], state);
+  }
+
+  utils.analyzeAndTraverse(walker, traverser, node, path, state);
+}
+
+function collectClosureIdentsAndTraverse(node, path, state) {
+  utils.analyzeAndTraverse(
+    visitLocalClosureIdentifiers,
+    collectClosureIdentsAndTraverse,
+    node,
+    path,
+    state
+  );
+}
+
+function collectBlockIdentsAndTraverse(node, path, state) {
+  utils.analyzeAndTraverse(
+    visitLocalBlockIdentifiers,
+    collectBlockIdentsAndTraverse,
+    node,
+    path,
+    state
+  );
+}
+
+function visitLocalClosureIdentifiers(node, path, state) {
+  var metaData;
+  switch (node.type) {
+    case Syntax.FunctionExpression:
+      // Function expressions don't get their names (if there is one) added to
+      // the closure scope they're defined in
+      return false;
+    case Syntax.ClassDeclaration:
+    case Syntax.ClassExpression:
+    case Syntax.FunctionDeclaration:
+      if (node.id) {
+        metaData = initScopeMetadata(getBoundaryNode(path), path.slice(), node);
+        declareIdentInScope(node.id.name, metaData, state);
+      }
+      return false;
+    case Syntax.VariableDeclarator:
+      // Variables have function-local scope
+      if (path[0].kind === 'var') {
+        metaData = initScopeMetadata(getBoundaryNode(path), path.slice(), node);
+        declareIdentInScope(node.id.name, metaData, state);
+      }
+      break;
+  }
+}
+
+function visitLocalBlockIdentifiers(node, path, state) {
+  // TODO: Support 'let' here...maybe...one day...or something...
+  if (node.type === Syntax.CatchClause) {
+    return false;
+  }
+}
+
+function walker(node, path, state) {
+  var visitors = state.g.visitors;
+  for (var i = 0; i < visitors.length; i++) {
+    if (visitors[i].test(node, path, state)) {
+      return visitors[i](traverse, node, path, state);
+    }
+  }
+}
+
+var _astCache = {};
+
+/**
+ * Applies all available transformations to the source
+ * @param {array} visitors
+ * @param {string} source
+ * @param {?object} options
+ * @return {object}
+ */
+function transform(visitors, source, options) {
+  options = options || {};
+  var ast;
+  try {
+    var cachedAst = _astCache[source];
+    ast = cachedAst ||
+      (_astCache[source] = esprima.parse(source, {
+        comment: true,
+        loc: true,
+        range: true
+      }));
+    } catch (e) {
+    e.message = 'Parse Error: ' + e.message;
+    throw e;
+  }
+  var state = utils.createState(source, ast, options);
+  state.g.visitors = visitors;
+
+  if (options.sourceMap) {
+    var SourceMapGenerator = _dereq_('source-map').SourceMapGenerator;
+    state.g.sourceMap = new SourceMapGenerator({file: options.filename || 'transformed.js'});
+  }
+
+  traverse(ast, [], state);
+  utils.catchup(source.length, state);
+
+  var ret = {code: state.g.buffer, extra: state.g.extra};
+  if (options.sourceMap) {
+    ret.sourceMap = state.g.sourceMap;
+    ret.sourceMapFilename =  options.filename || 'source.js';
+  }
+  return ret;
+}
+
+exports.transform = transform;
+
+},{"./utils":20,"esprima-fb":6,"source-map":8}],20:[function(_dereq_,module,exports){
+/**
+ * Copyright 2013 Facebook, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+/*jslint node: true*/
+var Syntax = _dereq_('esprima-fb').Syntax;
+var leadingIndentRegexp = /(^|\n)( {2}|\t)/g;
+var nonWhiteRegexp = /(\S)/g;
+
+/**
+ * A `state` object represents the state of the parser. It has "local" and
+ * "global" parts. Global contains parser position, source, etc. Local contains
+ * scope based properties like current class name. State should contain all the
+ * info required for transformation. It's the only mandatory object that is
+ * being passed to every function in transform chain.
+ *
+ * @param  {string} source
+ * @param  {object} transformOptions
+ * @return {object}
+ */
+function createState(source, rootNode, transformOptions) {
+  return {
+    /**
+     * A tree representing the current local scope (and its lexical scope chain)
+     * Useful for tracking identifiers from parent scopes, etc.
+     * @type {Object}
+     */
+    localScope: {
+      parentNode: rootNode,
+      parentScope: null,
+      identifiers: {},
+      tempVarIndex: 0
+    },
+    /**
+     * The name (and, if applicable, expression) of the super class
+     * @type {Object}
+     */
+    superClass: null,
+    /**
+     * The namespace to use when munging identifiers
+     * @type {String}
+     */
+    mungeNamespace: '',
+    /**
+     * Ref to the node for the current MethodDefinition
+     * @type {Object}
+     */
+    methodNode: null,
+    /**
+     * Ref to the node for the FunctionExpression of the enclosing
+     * MethodDefinition
+     * @type {Object}
+     */
+    methodFuncNode: null,
+    /**
+     * Name of the enclosing class
+     * @type {String}
+     */
+    className: null,
+    /**
+     * Whether we're currently within a `strict` scope
+     * @type {Bool}
+     */
+    scopeIsStrict: null,
+    /**
+     * Indentation offset
+     * @type {Number}
+     */
+    indentBy: 0,
+    /**
+     * Global state (not affected by updateState)
+     * @type {Object}
+     */
+    g: {
+      /**
+       * A set of general options that transformations can consider while doing
+       * a transformation:
+       *
+       * - minify
+       *   Specifies that transformation steps should do their best to minify
+       *   the output source when possible. This is useful for places where
+       *   minification optimizations are possible with higher-level context
+       *   info than what jsxmin can provide.
+       *
+       *   For example, the ES6 class transform will minify munged private
+       *   variables if this flag is set.
+       */
+      opts: transformOptions,
+      /**
+       * Current position in the source code
+       * @type {Number}
+       */
+      position: 0,
+      /**
+       * Auxiliary data to be returned by transforms
+       * @type {Object}
+       */
+      extra: {},
+      /**
+       * Buffer containing the result
+       * @type {String}
+       */
+      buffer: '',
+      /**
+       * Source that is being transformed
+       * @type {String}
+       */
+      source: source,
+
+      /**
+       * Cached parsed docblock (see getDocblock)
+       * @type {object}
+       */
+      docblock: null,
+
+      /**
+       * Whether the thing was used
+       * @type {Boolean}
+       */
+      tagNamespaceUsed: false,
+
+      /**
+       * If using bolt xjs transformation
+       * @type {Boolean}
+       */
+      isBolt: undefined,
+
+      /**
+       * Whether to record source map (expensive) or not
+       * @type {SourceMapGenerator|null}
+       */
+      sourceMap: null,
+
+      /**
+       * Filename of the file being processed. Will be returned as a source
+       * attribute in the source map
+       */
+      sourceMapFilename: 'source.js',
+
+      /**
+       * Only when source map is used: last line in the source for which
+       * source map was generated
+       * @type {Number}
+       */
+      sourceLine: 1,
+
+      /**
+       * Only when source map is used: last line in the buffer for which
+       * source map was generated
+       * @type {Number}
+       */
+      bufferLine: 1,
+
+      /**
+       * The top-level Program AST for the original file.
+       */
+      originalProgramAST: null,
+
+      sourceColumn: 0,
+      bufferColumn: 0
+    }
+  };
+}
+
+/**
+ * Updates a copy of a given state with "update" and returns an updated state.
+ *
+ * @param  {object} state
+ * @param  {object} update
+ * @return {object}
+ */
+function updateState(state, update) {
+  var ret = Object.create(state);
+  Object.keys(update).forEach(function(updatedKey) {
+    ret[updatedKey] = update[updatedKey];
+  });
+  return ret;
+}
+
+/**
+ * Given a state fill the resulting buffer from the original source up to
+ * the end
+ *
+ * @param {number} end
+ * @param {object} state
+ * @param {?function} contentTransformer Optional callback to transform newly
+ *                                       added content.
+ */
+function catchup(end, state, contentTransformer) {
+  if (end < state.g.position) {
+    // cannot move backwards
+    return;
+  }
+  var source = state.g.source.substring(state.g.position, end);
+  var transformed = updateIndent(source, state);
+  if (state.g.sourceMap && transformed) {
+    // record where we are
+    state.g.sourceMap.addMapping({
+      generated: { line: state.g.bufferLine, column: state.g.bufferColumn },
+      original: { line: state.g.sourceLine, column: state.g.sourceColumn },
+      source: state.g.sourceMapFilename
+    });
+
+    // record line breaks in transformed source
+    var sourceLines = source.split('\n');
+    var transformedLines = transformed.split('\n');
+    // Add line break mappings between last known mapping and the end of the
+    // added piece. So for the code piece
+    //  (foo, bar);
+    // > var x = 2;
+    // > var b = 3;
+    //   var c =
+    // only add lines marked with ">": 2, 3.
+    for (var i = 1; i < sourceLines.length - 1; i++) {
+      state.g.sourceMap.addMapping({
+        generated: { line: state.g.bufferLine, column: 0 },
+        original: { line: state.g.sourceLine, column: 0 },
+        source: state.g.sourceMapFilename
+      });
+      state.g.sourceLine++;
+      state.g.bufferLine++;
+    }
+    // offset for the last piece
+    if (sourceLines.length > 1) {
+      state.g.sourceLine++;
+      state.g.bufferLine++;
+      state.g.sourceColumn = 0;
+      state.g.bufferColumn = 0;
+    }
+    state.g.sourceColumn += sourceLines[sourceLines.length - 1].length;
+    state.g.bufferColumn +=
+      transformedLines[transformedLines.length - 1].length;
+  }
+  state.g.buffer +=
+    contentTransformer ? contentTransformer(transformed) : transformed;
+  state.g.position = end;
+}
+
+/**
+ * Returns original source for an AST node.
+ * @param {object} node
+ * @param {object} state
+ * @return {string}
+ */
+function getNodeSourceText(node, state) {
+  return state.g.source.substring(node.range[0], node.range[1]);
+}
+
+function replaceNonWhite(value) {
+  return value.replace(nonWhiteRegexp, ' ');
+}
+
+/**
+ * Removes all non-whitespace characters
+ */
+function stripNonWhite(value) {
+  return value.replace(nonWhiteRegexp, '');
+}
+
+/**
+ * Catches up as `catchup` but replaces non-whitespace chars with spaces.
+ */
+function catchupWhiteOut(end, state) {
+  catchup(end, state, replaceNonWhite);
+}
+
+/**
+ * Catches up as `catchup` but removes all non-whitespace characters.
+ */
+function catchupWhiteSpace(end, state) {
+  catchup(end, state, stripNonWhite);
+}
+
+/**
+ * Removes all non-newline characters
+ */
+var reNonNewline = /[^\n]/g;
+function stripNonNewline(value) {
+  return value.replace(reNonNewline, function() {
+    return '';
+  });
+}
+
+/**
+ * Catches up as `catchup` but removes all non-newline characters.
+ *
+ * Equivalent to appending as many newlines as there are in the original source
+ * between the current position and `end`.
+ */
+function catchupNewlines(end, state) {
+  catchup(end, state, stripNonNewline);
+}
+
+
+/**
+ * Same as catchup but does not touch the buffer
+ *
+ * @param  {number} end
+ * @param  {object} state
+ */
+function move(end, state) {
+  // move the internal cursors
+  if (state.g.sourceMap) {
+    if (end < state.g.position) {
+      state.g.position = 0;
+      state.g.sourceLine = 1;
+      state.g.sourceColumn = 0;
+    }
+
+    var source = state.g.source.substring(state.g.position, end);
+    var sourceLines = source.split('\n');
+    if (sourceLines.length > 1) {
+      state.g.sourceLine += sourceLines.length - 1;
+      state.g.sourceColumn = 0;
+    }
+    state.g.sourceColumn += sourceLines[sourceLines.length - 1].length;
+  }
+  state.g.position = end;
+}
+
+/**
+ * Appends a string of text to the buffer
+ *
+ * @param {string} str
+ * @param {object} state
+ */
+function append(str, state) {
+  if (state.g.sourceMap && str) {
+    state.g.sourceMap.addMapping({
+      generated: { line: state.g.bufferLine, column: state.g.bufferColumn },
+      original: { line: state.g.sourceLine, column: state.g.sourceColumn },
+      source: state.g.sourceMapFilename
+    });
+    var transformedLines = str.split('\n');
+    if (transformedLines.length > 1) {
+      state.g.bufferLine += transformedLines.length - 1;
+      state.g.bufferColumn = 0;
+    }
+    state.g.bufferColumn +=
+      transformedLines[transformedLines.length - 1].length;
+  }
+  state.g.buffer += str;
+}
+
+/**
+ * Update indent using state.indentBy property. Indent is measured in
+ * double spaces. Updates a single line only.
+ *
+ * @param {string} str
+ * @param {object} state
+ * @return {string}
+ */
+function updateIndent(str, state) {
+  var indentBy = state.indentBy;
+  if (indentBy < 0) {
+    for (var i = 0; i < -indentBy; i++) {
+      str = str.replace(leadingIndentRegexp, '$1');
+    }
+  } else {
+    for (var i = 0; i < indentBy; i++) {
+      str = str.replace(leadingIndentRegexp, '$1$2$2');
+    }
+  }
+  return str;
+}
+
+/**
+ * Calculates indent from the beginning of the line until "start" or the first
+ * character before start.
+ * @example
+ *   "  foo.bar()"
+ *         ^
+ *       start
+ *   indent will be "  "
+ *
+ * @param  {number} start
+ * @param  {object} state
+ * @return {string}
+ */
+function indentBefore(start, state) {
+  var end = start;
+  start = start - 1;
+
+  while (start > 0 && state.g.source[start] != '\n') {
+    if (!state.g.source[start].match(/[ \t]/)) {
+      end = start;
+    }
+    start--;
+  }
+  return state.g.source.substring(start + 1, end);
+}
+
+function getDocblock(state) {
+  if (!state.g.docblock) {
+    var docblock = _dereq_('./docblock');
+    state.g.docblock =
+      docblock.parseAsObject(docblock.extract(state.g.source));
+  }
+  return state.g.docblock;
+}
+
+function identWithinLexicalScope(identName, state, stopBeforeNode) {
+  var currScope = state.localScope;
+  while (currScope) {
+    if (currScope.identifiers[identName] !== undefined) {
+      return true;
+    }
+
+    if (stopBeforeNode && currScope.parentNode === stopBeforeNode) {
+      break;
+    }
+
+    currScope = currScope.parentScope;
+  }
+  return false;
+}
+
+function identInLocalScope(identName, state) {
+  return state.localScope.identifiers[identName] !== undefined;
+}
+
+/**
+ * @param {object} boundaryNode
+ * @param {?array} path
+ * @return {?object} node
+ */
+function initScopeMetadata(boundaryNode, path, node) {
+  return {
+    boundaryNode: boundaryNode,
+    bindingPath: path,
+    bindingNode: node
+  };
+}
+
+function declareIdentInLocalScope(identName, metaData, state) {
+  state.localScope.identifiers[identName] = {
+    boundaryNode: metaData.boundaryNode,
+    path: metaData.path,
+    node: metaData.node,
+    state: Object.create(state)
+  };
+}
+
+function getLexicalBindingMetadata(identName, state) {
+  return state.localScope.identifiers[identName];
+}
+
+/**
+ * Apply the given analyzer function to the current node. If the analyzer
+ * doesn't return false, traverse each child of the current node using the given
+ * traverser function.
+ *
+ * @param {function} analyzer
+ * @param {function} traverser
+ * @param {object} node
+ * @param {function} visitor
+ * @param {array} path
+ * @param {object} state
+ */
+function analyzeAndTraverse(analyzer, traverser, node, path, state) {
+  if (node.type) {
+    if (analyzer(node, path, state) === false) {
+      return;
+    }
+    path.unshift(node);
+  }
+
+  getOrderedChildren(node).forEach(function(child) {
+    traverser(child, path, state);
+  });
+
+  node.type && path.shift();
+}
+
+/**
+ * It is crucial that we traverse in order, or else catchup() on a later
+ * node that is processed out of order can move the buffer past a node
+ * that we haven't handled yet, preventing us from modifying that node.
+ *
+ * This can happen when a node has multiple properties containing children.
+ * For example, XJSElement nodes have `openingElement`, `closingElement` and
+ * `children`. If we traverse `openingElement`, then `closingElement`, then
+ * when we get to `children`, the buffer has already caught up to the end of
+ * the closing element, after the children.
+ *
+ * This is basically a Schwartzian transform. Collects an array of children,
+ * each one represented as [child, startIndex]; sorts the array by start
+ * index; then traverses the children in that order.
+ */
+function getOrderedChildren(node) {
+  var queue = [];
+  for (var key in node) {
+    if (node.hasOwnProperty(key)) {
+      enqueueNodeWithStartIndex(queue, node[key]);
+    }
+  }
+  queue.sort(function(a, b) { return a[1] - b[1]; });
+  return queue.map(function(pair) { return pair[0]; });
+}
+
+/**
+ * Helper function for analyzeAndTraverse which queues up all of the children
+ * of the given node.
+ *
+ * Children can also be found in arrays, so we basically want to merge all of
+ * those arrays together so we can sort them and then traverse the children
+ * in order.
+ *
+ * One example is the Program node. It contains `body` and `comments`, both
+ * arrays. Lexographically, comments are interspersed throughout the body
+ * nodes, but esprima's AST groups them together.
+ */
+function enqueueNodeWithStartIndex(queue, node) {
+  if (typeof node !== 'object' || node === null) {
+    return;
+  }
+  if (node.range) {
+    queue.push([node, node.range[0]]);
+  } else if (Array.isArray(node)) {
+    for (var ii = 0; ii < node.length; ii++) {
+      enqueueNodeWithStartIndex(queue, node[ii]);
+    }
+  }
+}
+
+/**
+ * Checks whether a node or any of its sub-nodes contains
+ * a syntactic construct of the passed type.
+ * @param {object} node - AST node to test.
+ * @param {string} type - node type to lookup.
+ */
+function containsChildOfType(node, type) {
+  var foundMatchingChild = false;
+  function nodeTypeAnalyzer(node) {
+    if (node.type === type) {
+      foundMatchingChild = true;
+      return false;
+    }
+  }
+  function nodeTypeTraverser(child, path, state) {
+    if (!foundMatchingChild) {
+      foundMatchingChild = containsChildOfType(child, type);
+    }
+  }
+  analyzeAndTraverse(
+    nodeTypeAnalyzer,
+    nodeTypeTraverser,
+    node,
+    []
+  );
+  return foundMatchingChild;
+}
+
+var scopeTypes = {};
+scopeTypes[Syntax.FunctionExpression] = true;
+scopeTypes[Syntax.FunctionDeclaration] = true;
+scopeTypes[Syntax.Program] = true;
+
+function getBoundaryNode(path) {
+  for (var ii = 0; ii < path.length; ++ii) {
+    if (scopeTypes[path[ii].type]) {
+      return path[ii];
+    }
+  }
+  throw new Error(
+    'Expected to find a node with one of the following types in path:\n' +
+    JSON.stringify(Object.keys(scopeTypes))
+  );
+}
+
+exports.append = append;
+exports.catchup = catchup;
+exports.catchupWhiteOut = catchupWhiteOut;
+exports.catchupWhiteSpace = catchupWhiteSpace;
+exports.catchupNewlines = catchupNewlines;
+exports.containsChildOfType = containsChildOfType;
+exports.createState = createState;
+exports.declareIdentInLocalScope = declareIdentInLocalScope;
+exports.getBoundaryNode = getBoundaryNode;
+exports.getDocblock = getDocblock;
+exports.getLexicalBindingMetadata = getLexicalBindingMetadata;
+exports.initScopeMetadata = initScopeMetadata;
+exports.identWithinLexicalScope = identWithinLexicalScope;
+exports.identInLocalScope = identInLocalScope;
+exports.indentBefore = indentBefore;
+exports.move = move;
+exports.scopeTypes = scopeTypes;
+exports.updateIndent = updateIndent;
+exports.updateState = updateState;
+exports.analyzeAndTraverse = analyzeAndTraverse;
+exports.getOrderedChildren = getOrderedChildren;
+exports.getNodeSourceText = getNodeSourceText;
+
+},{"./docblock":18,"esprima-fb":6}],21:[function(_dereq_,module,exports){
+/**
+ * Copyright 2013 Facebook, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/*global exports:true*/
+
+/**
+ * Desugars ES6 Arrow functions to ES3 function expressions.
+ * If the function contains `this` expression -- automatically
+ * binds the function to current value of `this`.
+ *
+ * Single parameter, simple expression:
+ *
+ * [1, 2, 3].map(x => x * x);
+ *
+ * [1, 2, 3].map(function(x) { return x * x; });
+ *
+ * Several parameters, complex block:
+ *
+ * this.users.forEach((user, idx) => {
+ *   return this.isActive(idx) && this.send(user);
+ * });
+ *
+ * this.users.forEach(function(user, idx) {
+ *   return this.isActive(idx) && this.send(user);
+ * }.bind(this));
+ *
+ */
+var restParamVisitors = _dereq_('./es6-rest-param-visitors');
+var destructuringVisitors = _dereq_('./es6-destructuring-visitors');
+
+var Syntax = _dereq_('esprima-fb').Syntax;
+var utils = _dereq_('../src/utils');
+
+/**
+ * @public
+ */
+function visitArrowFunction(traverse, node, path, state) {
+  var notInExpression = (path[0].type === Syntax.ExpressionStatement);
+
+  // Wrap a function into a grouping operator, if it's not
+  // in the expression position.
+  if (notInExpression) {
+    utils.append('(', state);
+  }
+
+  utils.append('function', state);
+  renderParams(traverse, node, path, state);
+
+  // Skip arrow.
+  utils.catchupWhiteSpace(node.body.range[0], state);
+
+  var renderBody = node.body.type == Syntax.BlockStatement
+    ? renderStatementBody
+    : renderExpressionBody;
+
+  path.unshift(node);
+  renderBody(traverse, node, path, state);
+  path.shift();
+
+  // Bind the function only if `this` value is used
+  // inside it or inside any sub-expression.
+  if (utils.containsChildOfType(node.body, Syntax.ThisExpression)) {
+    utils.append('.bind(this)', state);
+  }
+
+  utils.catchupWhiteSpace(node.range[1], state);
+
+  // Close wrapper if not in the expression.
+  if (notInExpression) {
+    utils.append(')', state);
+  }
+
+  return false;
+}
+
+function renderParams(traverse, node, path, state) {
+  // To preserve inline typechecking directives, we
+  // distinguish between parens-free and paranthesized single param.
+  if (isParensFreeSingleParam(node, state) || !node.params.length) {
+    utils.append('(', state);
+  }
+  if (node.params.length !== 0) {
+    path.unshift(node);
+    traverse(node.params, path, state);
+    path.unshift();
+  }
+  utils.append(')', state);
+}
+
+function isParensFreeSingleParam(node, state) {
+  return node.params.length === 1 &&
+    state.g.source[state.g.position] !== '(';
+}
+
+function renderExpressionBody(traverse, node, path, state) {
+  // Wrap simple expression bodies into a block
+  // with explicit return statement.
+  utils.append('{', state);
+
+  // Special handling of rest param.
+  if (node.rest) {
+    utils.append(
+      restParamVisitors.renderRestParamSetup(node),
+      state
+    );
+  }
+
+  // Special handling of destructured params.
+  destructuringVisitors.renderDestructuredComponents(
+    node,
+    utils.updateState(state, {
+      localScope: {
+        parentNode: state.parentNode,
+        parentScope: state.parentScope,
+        identifiers: state.identifiers,
+        tempVarIndex: 0
+      }
+    })
+  );
+
+  utils.append('return ', state);
+  renderStatementBody(traverse, node, path, state);
+  utils.append(';}', state);
+}
+
+function renderStatementBody(traverse, node, path, state) {
+  traverse(node.body, path, state);
+  utils.catchup(node.body.range[1], state);
+}
+
+visitArrowFunction.test = function(node, path, state) {
+  return node.type === Syntax.ArrowFunctionExpression;
+};
+
+exports.visitorList = [
+  visitArrowFunction
+];
+
+
+},{"../src/utils":20,"./es6-destructuring-visitors":23,"./es6-rest-param-visitors":26,"esprima-fb":6}],22:[function(_dereq_,module,exports){
+/**
+ * Copyright 2013 Facebook, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/*jslint node:true*/
+
+/**
+ * @typechecks
+ */
+'use strict';
+
+var base62 = _dereq_('base62');
+var Syntax = _dereq_('esprima-fb').Syntax;
+var utils = _dereq_('../src/utils');
+
+var declareIdentInLocalScope = utils.declareIdentInLocalScope;
+var initScopeMetadata = utils.initScopeMetadata;
+
+var SUPER_PROTO_IDENT_PREFIX = '____SuperProtoOf';
+
+var _anonClassUUIDCounter = 0;
+var _mungedSymbolMaps = {};
+
+function resetSymbols() {
+  _anonClassUUIDCounter = 0;
+  _mungedSymbolMaps = {};
+}
+
+/**
+ * Used to generate a unique class for use with code-gens for anonymous class
+ * expressions.
+ *
+ * @param {object} state
+ * @return {string}
+ */
+function _generateAnonymousClassName(state) {
+  var mungeNamespace = state.mungeNamespace || '';
+  return '____Class' + mungeNamespace + base62.encode(_anonClassUUIDCounter++);
+}
+
+/**
+ * Given an identifier name, munge it using the current state's mungeNamespace.
+ *
+ * @param {string} identName
+ * @param {object} state
+ * @return {string}
+ */
+function _getMungedName(identName, state) {
+  var mungeNamespace = state.mungeNamespace;
+  var shouldMinify = state.g.opts.minify;
+
+  if (shouldMinify) {
+    if (!_mungedSymbolMaps[mungeNamespace]) {
+      _mungedSymbolMaps[mungeNamespace] = {
+        symbolMap: {},
+        identUUIDCounter: 0
+      };
+    }
+
+    var symbolMap = _mungedSymbolMaps[mungeNamespace].symbolMap;
+    if (!symbolMap[identName]) {
+      symbolMap[identName] =
+        base62.encode(_mungedSymbolMaps[mungeNamespace].identUUIDCounter++);
+    }
+    identName = symbolMap[identName];
+  }
+  return '$' + mungeNamespace + identName;
+}
+
+/**
+ * Extracts super class information from a class node.
+ *
+ * Information includes name of the super class and/or the expression string
+ * (if extending from an expression)
+ *
+ * @param {object} node
+ * @param {object} state
+ * @return {object}
+ */
+function _getSuperClassInfo(node, state) {
+  var ret = {
+    name: null,
+    expression: null
+  };
+  if (node.superClass) {
+    if (node.superClass.type === Syntax.Identifier) {
+      ret.name = node.superClass.name;
+    } else {
+      // Extension from an expression
+      ret.name = _generateAnonymousClassName(state);
+      ret.expression = state.g.source.substring(
+        node.superClass.range[0],
+        node.superClass.range[1]
+      );
+    }
+  }
+  return ret;
+}
+
+/**
+ * Used with .filter() to find the constructor method in a list of
+ * MethodDefinition nodes.
+ *
+ * @param {object} classElement
+ * @return {boolean}
+ */
+function _isConstructorMethod(classElement) {
+  return classElement.type === Syntax.MethodDefinition &&
+         classElement.key.type === Syntax.Identifier &&
+         classElement.key.name === 'constructor';
+}
+
+/**
+ * @param {object} node
+ * @param {object} state
+ * @return {boolean}
+ */
+function _shouldMungeIdentifier(node, state) {
+  return (
+    !!state.methodFuncNode &&
+    !utils.getDocblock(state).hasOwnProperty('preventMunge') &&
+    /^_(?!_)/.test(node.name)
+  );
+}
+
+/**
+ * @param {function} traverse
+ * @param {object} node
+ * @param {array} path
+ * @param {object} state
+ */
+function visitClassMethod(traverse, node, path, state) {
+  if (node.kind === 'get' || node.kind === 'set') {
+    throw new Error(
+      'This transform does not support ' + node.kind + 'ter methods for ES6 ' +
+      'classes. (line: ' + node.loc.start.line + ', col: ' +
+      node.loc.start.column + ')'
+    );
+  }
+  state = utils.updateState(state, {
+    methodNode: node
+  });
+  utils.catchup(node.range[0], state);
+  path.unshift(node);
+  traverse(node.value, path, state);
+  path.shift();
+  return false;
+}
+visitClassMethod.test = function(node, path, state) {
+  return node.type === Syntax.MethodDefinition;
+};
+
+/**
+ * @param {function} traverse
+ * @param {object} node
+ * @param {array} path
+ * @param {object} state
+ */
+function visitClassFunctionExpression(traverse, node, path, state) {
+  var methodNode = path[0];
+
+  state = utils.updateState(state, {
+    methodFuncNode: node
+  });
+
+  if (methodNode.key.name === 'constructor') {
+    utils.append('function ' + state.className, state);
+  } else {
+    var methodAccessor;
+    var prototypeOrStatic = methodNode["static"] ? '' : '.prototype';
+
+    if (methodNode.key.type === Syntax.Identifier) {
+      // foo() {}
+      methodAccessor = methodNode.key.name;
+      if (_shouldMungeIdentifier(methodNode.key, state)) {
+        methodAccessor = _getMungedName(methodAccessor, state);
+      }
+      methodAccessor = '.' + methodAccessor;
+    } else if (methodNode.key.type === Syntax.Literal) {
+      // 'foo bar'() {}
+      methodAccessor = '[' + JSON.stringify(methodNode.key.value) + ']';
+    }
+
+    utils.append(
+      state.className + prototypeOrStatic +
+      methodAccessor + '=function',
+      state
+    );
+  }
+  utils.move(methodNode.key.range[1], state);
+  utils.append('(', state);
+
+  var params = node.params;
+  if (params.length > 0) {
+    utils.move(params[0].range[0], state);
+    for (var i = 0; i < params.length; i++) {
+      utils.catchup(node.params[i].range[0], state);
+      path.unshift(node);
+      traverse(params[i], path, state);
+      path.shift();
+    }
+  }
+  utils.append(')', state);
+  utils.catchupWhiteSpace(node.body.range[0], state);
+  utils.append('{', state);
+  if (!state.scopeIsStrict) {
+    utils.append('"use strict";', state);
+    state = utils.updateState(state, {
+      scopeIsStrict: true
+    });
+  }
+  utils.move(node.body.range[0] + '{'.length, state);
+
+  path.unshift(node);
+  traverse(node.body, path, state);
+  path.shift();
+  utils.catchup(node.body.range[1], state);
+
+  if (methodNode.key.name !== 'constructor') {
+    utils.append(';', state);
+  }
+  return false;
+}
+visitClassFunctionExpression.test = function(node, path, state) {
+  return node.type === Syntax.FunctionExpression
+         && path[0].type === Syntax.MethodDefinition;
+};
+
+function visitClassMethodParam(traverse, node, path, state) {
+  var paramName = node.name;
+  if (_shouldMungeIdentifier(node, state)) {
+    paramName = _getMungedName(node.name, state);
+  }
+  utils.append(paramName, state);
+  utils.move(node.range[1], state);
+}
+visitClassMethodParam.test = function(node, path, state) {
+  if (!path[0] || !path[1]) {
+    return;
+  }
+
+  var parentFuncExpr = path[0];
+  var parentClassMethod = path[1];
+
+  return parentFuncExpr.type === Syntax.FunctionExpression
+         && parentClassMethod.type === Syntax.MethodDefinition
+         && node.type === Syntax.Identifier;
+};
+
+/**
+ * @param {function} traverse
+ * @param {object} node
+ * @param {array} path
+ * @param {object} state
+ */
+function _renderClassBody(traverse, node, path, state) {
+  var className = state.className;
+  var superClass = state.superClass;
+
+  // Set up prototype of constructor on same line as `extends` for line-number
+  // preservation. This relies on function-hoisting if a constructor function is
+  // defined in the class body.
+  if (superClass.name) {
+    // If the super class is an expression, we need to memoize the output of the
+    // expression into the generated class name variable and use that to refer
+    // to the super class going forward. Example:
+    //
+    //   class Foo extends mixin(Bar, Baz) {}
+    //     --transforms to--
+    //   function Foo() {} var ____Class0Blah = mixin(Bar, Baz);
+    if (superClass.expression !== null) {
+      utils.append(
+        'var ' + superClass.name + '=' + superClass.expression + ';',
+        state
+      );
+    }
+
+    var keyName = superClass.name + '____Key';
+    var keyNameDeclarator = '';
+    if (!utils.identWithinLexicalScope(keyName, state)) {
+      keyNameDeclarator = 'var ';
+      declareIdentInLocalScope(keyName, initScopeMetadata(node), state);
+    }
+    utils.append(
+      'for(' + keyNameDeclarator + keyName + ' in ' + superClass.name + '){' +
+        'if(' + superClass.name + '.hasOwnProperty(' + keyName + ')){' +
+          className + '[' + keyName + ']=' +
+            superClass.name + '[' + keyName + '];' +
+        '}' +
+      '}',
+      state
+    );
+
+    var superProtoIdentStr = SUPER_PROTO_IDENT_PREFIX + superClass.name;
+    if (!utils.identWithinLexicalScope(superProtoIdentStr, state)) {
+      utils.append(
+        'var ' + superProtoIdentStr + '=' + superClass.name + '===null?' +
+        'null:' + superClass.name + '.prototype;',
+        state
+      );
+      declareIdentInLocalScope(superProtoIdentStr, initScopeMetadata(node), state);
+    }
+
+    utils.append(
+      className + '.prototype=Object.create(' + superProtoIdentStr + ');',
+      state
+    );
+    utils.append(
+      className + '.prototype.constructor=' + className + ';',
+      state
+    );
+    utils.append(
+      className + '.__superConstructor__=' + superClass.name + ';',
+      state
+    );
+  }
+
+  // If there's no constructor method specified in the class body, create an
+  // empty constructor function at the top (same line as the class keyword)
+  if (!node.body.body.filter(_isConstructorMethod).pop()) {
+    utils.append('function ' + className + '(){', state);
+    if (!state.scopeIsStrict) {
+      utils.append('"use strict";', state);
+    }
+    if (superClass.name) {
+      utils.append(
+        'if(' + superClass.name + '!==null){' +
+        superClass.name + '.apply(this,arguments);}',
+        state
+      );
+    }
+    utils.append('}', state);
+  }
+
+  utils.move(node.body.range[0] + '{'.length, state);
+  traverse(node.body, path, state);
+  utils.catchupWhiteSpace(node.range[1], state);
+}
+
+/**
+ * @param {function} traverse
+ * @param {object} node
+ * @param {array} path
+ * @param {object} state
+ */
+function visitClassDeclaration(traverse, node, path, state) {
+  var className = node.id.name;
+  var superClass = _getSuperClassInfo(node, state);
+
+  state = utils.updateState(state, {
+    mungeNamespace: className,
+    className: className,
+    superClass: superClass
+  });
+
+  _renderClassBody(traverse, node, path, state);
+
+  return false;
+}
+visitClassDeclaration.test = function(node, path, state) {
+  return node.type === Syntax.ClassDeclaration;
+};
+
+/**
+ * @param {function} traverse
+ * @param {object} node
+ * @param {array} path
+ * @param {object} state
+ */
+function visitClassExpression(traverse, node, path, state) {
+  var className = node.id && node.id.name || _generateAnonymousClassName(state);
+  var superClass = _getSuperClassInfo(node, state);
+
+  utils.append('(function(){', state);
+
+  state = utils.updateState(state, {
+    mungeNamespace: className,
+    className: className,
+    superClass: superClass
+  });
+
+  _renderClassBody(traverse, node, path, state);
+
+  utils.append('return ' + className + ';})()', state);
+  return false;
+}
+visitClassExpression.test = function(node, path, state) {
+  return node.type === Syntax.ClassExpression;
+};
+
+/**
+ * @param {function} traverse
+ * @param {object} node
+ * @param {array} path
+ * @param {object} state
+ */
+function visitPrivateIdentifier(traverse, node, path, state) {
+  utils.append(_getMungedName(node.name, state), state);
+  utils.move(node.range[1], state);
+}
+visitPrivateIdentifier.test = function(node, path, state) {
+  if (node.type === Syntax.Identifier && _shouldMungeIdentifier(node, state)) {
+    // Always munge non-computed properties of MemberExpressions
+    // (a la preventing access of properties of unowned objects)
+    if (path[0].type === Syntax.MemberExpression && path[0].object !== node
+        && path[0].computed === false) {
+      return true;
+    }
+
+    // Always munge identifiers that were declared within the method function
+    // scope
+    if (utils.identWithinLexicalScope(node.name, state, state.methodFuncNode)) {
+      return true;
+    }
+
+    // Always munge private keys on object literals defined within a method's
+    // scope.
+    if (path[0].type === Syntax.Property
+        && path[1].type === Syntax.ObjectExpression) {
+      return true;
+    }
+
+    // Always munge function parameters
+    if (path[0].type === Syntax.FunctionExpression
+        || path[0].type === Syntax.FunctionDeclaration
+        || path[0].type === Syntax.ArrowFunctionExpression) {
+      for (var i = 0; i < path[0].params.length; i++) {
+        if (path[0].params[i] === node) {
+          return true;
+        }
+      }
+    }
+  }
+  return false;
+};
+
+/**
+ * @param {function} traverse
+ * @param {object} node
+ * @param {array} path
+ * @param {object} state
+ */
+function visitSuperCallExpression(traverse, node, path, state) {
+  var superClassName = state.superClass.name;
+
+  if (node.callee.type === Syntax.Identifier) {
+    if (_isConstructorMethod(state.methodNode)) {
+      utils.append(superClassName + '.call(', state);
+    } else {
+      var protoProp = SUPER_PROTO_IDENT_PREFIX + superClassName;
+      if (state.methodNode.key.type === Syntax.Identifier) {
+        protoProp += '.' + state.methodNode.key.name;
+      } else if (state.methodNode.key.type === Syntax.Literal) {
+        protoProp += '[' + JSON.stringify(state.methodNode.key.value) + ']';
+      }
+      utils.append(protoProp + ".call(", state);
+    }
+    utils.move(node.callee.range[1], state);
+  } else if (node.callee.type === Syntax.MemberExpression) {
+    utils.append(SUPER_PROTO_IDENT_PREFIX + superClassName, state);
+    utils.move(node.callee.object.range[1], state);
+
+    if (node.callee.computed) {
+      // ["a" + "b"]
+      utils.catchup(node.callee.property.range[1] + ']'.length, state);
+    } else {
+      // .ab
+      utils.append('.' + node.callee.property.name, state);
+    }
+
+    utils.append('.call(', state);
+    utils.move(node.callee.range[1], state);
+  }
+
+  utils.append('this', state);
+  if (node.arguments.length > 0) {
+    utils.append(',', state);
+    utils.catchupWhiteSpace(node.arguments[0].range[0], state);
+    traverse(node.arguments, path, state);
+  }
+
+  utils.catchupWhiteSpace(node.range[1], state);
+  utils.append(')', state);
+  return false;
+}
+visitSuperCallExpression.test = function(node, path, state) {
+  if (state.superClass && node.type === Syntax.CallExpression) {
+    var callee = node.callee;
+    if (callee.type === Syntax.Identifier && callee.name === 'super'
+        || callee.type == Syntax.MemberExpression
+           && callee.object.name === 'super') {
+      return true;
+    }
+  }
+  return false;
+};
+
+/**
+ * @param {function} traverse
+ * @param {object} node
+ * @param {array} path
+ * @param {object} state
+ */
+function visitSuperMemberExpression(traverse, node, path, state) {
+  var superClassName = state.superClass.name;
+
+  utils.append(SUPER_PROTO_IDENT_PREFIX + superClassName, state);
+  utils.move(node.object.range[1], state);
+}
+visitSuperMemberExpression.test = function(node, path, state) {
+  return state.superClass
+         && node.type === Syntax.MemberExpression
+         && node.object.type === Syntax.Identifier
+         && node.object.name === 'super';
+};
+
+exports.resetSymbols = resetSymbols;
+
+exports.visitorList = [
+  visitClassDeclaration,
+  visitClassExpression,
+  visitClassFunctionExpression,
+  visitClassMethod,
+  visitClassMethodParam,
+  visitPrivateIdentifier,
+  visitSuperCallExpression,
+  visitSuperMemberExpression
+];
+
+},{"../src/utils":20,"base62":7,"esprima-fb":6}],23:[function(_dereq_,module,exports){
+/**
+ * Copyright 2014 Facebook, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+/*global exports:true*/
+
+/**
+ * Implements ES6 destructuring assignment and pattern matchng.
+ *
+ * function init({port, ip, coords: [x, y]}) {
+ *   return (x && y) ? {id, port} : {ip};
+ * };
+ *
+ * function init($__0) {
+ *   var
+ *    port = $__0.port,
+ *    ip = $__0.ip,
+ *    $__1 = $__0.coords,
+ *    x = $__1[0],
+ *    y = $__1[1];
+ *   return (x && y) ? {id, port} : {ip};
+ * }
+ *
+ * var x, {ip, port} = init({ip, port});
+ *
+ * var x, $__0 = init({ip, port}), ip = $__0.ip, port = $__0.port;
+ *
+ */
+var Syntax = _dereq_('esprima-fb').Syntax;
+var utils = _dereq_('../src/utils');
+
+var restParamVisitors = _dereq_('./es6-rest-param-visitors');
+
+// -------------------------------------------------------
+// 1. Structured variable declarations.
+//
+// var [a, b] = [b, a];
+// var {x, y} = {y, x};
+// -------------------------------------------------------
+
+function visitStructuredVariable(traverse, node, path, state) {
+  // Allocate new temp for the pattern.
+  utils.append(getTmpVar(state.localScope.tempVarIndex) + '=', state);
+  // Skip the pattern and assign the init to the temp.
+  utils.catchupWhiteSpace(node.init.range[0], state);
+  traverse(node.init, path, state);
+  utils.catchup(node.init.range[1], state);
+  // Render the destructured data.
+  utils.append(',' + getDestructuredComponents(node.id, state), state);
+  state.localScope.tempVarIndex++;
+  return false;
+}
+
+visitStructuredVariable.test = function(node, path, state) {
+  return node.type === Syntax.VariableDeclarator &&
+    isStructuredPattern(node.id);
+};
+
+function isStructuredPattern(node) {
+  return node.type === Syntax.ObjectPattern ||
+    node.type === Syntax.ArrayPattern;
+}
+
+// Main function which does actual recursive destructuring
+// of nested complex structures.
+function getDestructuredComponents(node, state) {
+  var tmpIndex = state.localScope.tempVarIndex;
+  var components = [];
+  var patternItems = getPatternItems(node);
+
+  for (var idx = 0; idx < patternItems.length; idx++) {
+    var item = patternItems[idx];
+    if (!item) {
+      continue;
+    }
+
+    // Depending on pattern type (Array or Object), we get
+    // corresponding pattern item parts.
+    var accessor = getPatternItemAccessor(node, item, tmpIndex, idx);
+    var value = getPatternItemValue(node, item);
+
+    // TODO(dmitrys): implement default values: {x, y=5}
+    if (value.type === Syntax.Identifier) {
+      // Simple pattern item.
+      components.push(value.name + '=' + accessor);
+    } else if (value.type === Syntax.SpreadElement) {
+      // Spread/rest of an array.
+      // TODO(dmitrys): support spread in the middle of a pattern
+      // and also for function param patterns: [x, ...xs, y]
+      components.push(value.argument.name +
+        '=Array.prototype.slice.call(' +
+        getTmpVar(tmpIndex) + ',' + idx + ')'
+      );
+    } else {
+      // Complex sub-structure.
+      components.push(
+        getInitialValue(++state.localScope.tempVarIndex, accessor) + ',' +
+        getDestructuredComponents(value, state)
+      );
+    }
+  }
+
+  return components.join(',');
+}
+
+function getPatternItems(node) {
+  return node.properties || node.elements;
+}
+
+function getPatternItemAccessor(node, patternItem, tmpIndex, idx) {
+  var tmpName = getTmpVar(tmpIndex);
+  return node.type === Syntax.ObjectPattern
+    ? tmpName + '.' + patternItem.key.name
+    : tmpName + '[' + idx + ']';
+}
+
+function getPatternItemValue(node, patternItem) {
+  return node.type === Syntax.ObjectPattern
+    ? patternItem.value
+    : patternItem;
+}
+
+function getInitialValue(index, value) {
+  return getTmpVar(index) + '=' + value;
+}
+
+function getTmpVar(index) {
+  return '$__' + index;
+}
+
+// -------------------------------------------------------
+// 2. Assignment expression.
+//
+// [a, b] = [b, a];
+// ({x, y} = {y, x});
+// -------------------------------------------------------
+
+function visitStructuredAssignment(traverse, node, path, state) {
+  var exprNode = node.expression;
+  utils.append('var ' + getTmpVar(state.localScope.tempVarIndex) + '=', state);
+
+  utils.catchupWhiteSpace(exprNode.right.range[0], state);
+  traverse(exprNode.right, path, state);
+  utils.catchup(exprNode.right.range[1], state);
+
+  utils.append(
+    ',' + getDestructuredComponents(exprNode.left, state) + ';',
+    state
+  );
+
+  utils.catchupWhiteSpace(node.range[1], state);
+  state.localScope.tempVarIndex++;
+  return false;
+}
+
+visitStructuredAssignment.test = function(node, path, state) {
+  // We consider the expression statement rather than just assignment
+  // expression to cover case with object patters which should be
+  // wrapped in grouping operator: ({x, y} = {y, x});
+  return node.type === Syntax.ExpressionStatement &&
+    node.expression.type === Syntax.AssignmentExpression &&
+    isStructuredPattern(node.expression.left);
+};
+
+// -------------------------------------------------------
+// 3. Structured parameter.
+//
+// function foo({x, y}) { ... }
+// -------------------------------------------------------
+
+function visitStructuredParameter(traverse, node, path, state) {
+  utils.append(getTmpVar(getParamIndex(node, path)), state);
+  utils.catchupWhiteSpace(node.range[1], state);
+  return true;
+}
+
+function getParamIndex(paramNode, path) {
+  var funcNode = path[0];
+  var tmpIndex = 0;
+  for (var k = 0; k < funcNode.params.length; k++) {
+    var param = funcNode.params[k];
+    if (param === paramNode) {
+      break;
+    }
+    if (isStructuredPattern(param)) {
+      tmpIndex++;
+    }
+  }
+  return tmpIndex;
+}
+
+visitStructuredParameter.test = function(node, path, state) {
+  return isStructuredPattern(node) && isFunctionNode(path[0]);
+};
+
+function isFunctionNode(node) {
+  return (node.type == Syntax.FunctionDeclaration ||
+    node.type == Syntax.FunctionExpression ||
+    node.type == Syntax.MethodDefinition ||
+    node.type == Syntax.ArrowFunctionExpression);
+}
+
+// -------------------------------------------------------
+// 4. Function body for structured parameters.
+//
+// function foo({x, y}) { x; y; }
+// -------------------------------------------------------
+
+function visitFunctionBodyForStructuredParameter(traverse, node, path, state) {
+  var funcNode = path[0];
+
+  utils.catchup(funcNode.body.range[0] + 1, state);
+  renderDestructuredComponents(funcNode, state);
+
+  if (funcNode.rest) {
+    utils.append(
+      restParamVisitors.renderRestParamSetup(funcNode),
+      state
+    );
+  }
+
+  return true;
+}
+
+function renderDestructuredComponents(funcNode, state) {
+  var destructuredComponents = [];
+
+  for (var k = 0; k < funcNode.params.length; k++) {
+    var param = funcNode.params[k];
+    if (isStructuredPattern(param)) {
+      destructuredComponents.push(
+        getDestructuredComponents(param, state)
+      );
+      state.localScope.tempVarIndex++;
+    }
+  }
+
+  if (destructuredComponents.length) {
+    utils.append('var ' + destructuredComponents.join(',') + ';', state);
+  }
+}
+
+visitFunctionBodyForStructuredParameter.test = function(node, path, state) {
+  return node.type === Syntax.BlockStatement && isFunctionNode(path[0]);
+};
+
+exports.visitorList = [
+  visitStructuredVariable,
+  visitStructuredAssignment,
+  visitStructuredParameter,
+  visitFunctionBodyForStructuredParameter
+];
+
+exports.renderDestructuredComponents = renderDestructuredComponents;
+
+
+},{"../src/utils":20,"./es6-rest-param-visitors":26,"esprima-fb":6}],24:[function(_dereq_,module,exports){
+/**
+ * Copyright 2013 Facebook, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/*jslint node:true*/
+
+/**
+ * Desugars concise methods of objects to ES3 function expressions.
+ *
+ * var foo = {
+ *   method(x, y) { ... }
+ * };
+ *
+ * var foo = {
+ *   method: function(x, y) { ... }
+ * };
+ *
+ */
+
+var Syntax = _dereq_('esprima-fb').Syntax;
+var utils = _dereq_('../src/utils');
+
+function visitObjectConciseMethod(traverse, node, path, state) {
+  utils.catchup(node.key.range[1], state);
+  utils.append(':function', state);
+  path.unshift(node);
+  traverse(node.value, path, state);
+  path.shift();
+  return false;
+}
+
+visitObjectConciseMethod.test = function(node, path, state) {
+  return node.type === Syntax.Property &&
+    node.value.type === Syntax.FunctionExpression &&
+    node.method === true;
+};
+
+exports.visitorList = [
+  visitObjectConciseMethod
+];
+
+},{"../src/utils":20,"esprima-fb":6}],25:[function(_dereq_,module,exports){
+/**
+ * Copyright 2013 Facebook, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/*jslint node: true*/
+
+/**
+ * Desugars ES6 Object Literal short notations into ES3 full notation.
+ *
+ * // Easier return values.
+ * function foo(x, y) {
+ *   return {x, y}; // {x: x, y: y}
+ * };
+ *
+ * // Destrucruting.
+ * function init({port, ip, coords: {x, y}}) { ... }
+ *
+ */
+var Syntax = _dereq_('esprima-fb').Syntax;
+var utils = _dereq_('../src/utils');
+
+/**
+ * @public
+ */
+function visitObjectLiteralShortNotation(traverse, node, path, state) {
+  utils.catchup(node.key.range[1], state);
+  utils.append(':' + node.key.name, state);
+  return false;
+}
+
+visitObjectLiteralShortNotation.test = function(node, path, state) {
+  return node.type === Syntax.Property &&
+    node.kind === 'init' &&
+    node.shorthand === true &&
+    path[0].type !== Syntax.ObjectPattern;
+};
+
+exports.visitorList = [
+  visitObjectLiteralShortNotation
+];
+
+
+},{"../src/utils":20,"esprima-fb":6}],26:[function(_dereq_,module,exports){
+/**
+ * Copyright 2013 Facebook, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/*jslint node:true*/
+
+/**
+ * Desugars ES6 rest parameters into ES3 arguments slicing.
+ *
+ * function printf(template, ...args) {
+ *   args.forEach(...);
+ * };
+ *
+ * function printf(template) {
+ *   var args = [].slice.call(arguments, 1);
+ *   args.forEach(...);
+ * };
+ *
+ */
+var Syntax = _dereq_('esprima-fb').Syntax;
+var utils = _dereq_('../src/utils');
+
+
+
+function _nodeIsFunctionWithRestParam(node) {
+  return (node.type === Syntax.FunctionDeclaration
+          || node.type === Syntax.FunctionExpression
+          || node.type === Syntax.ArrowFunctionExpression)
+         && node.rest;
+}
+
+function visitFunctionParamsWithRestParam(traverse, node, path, state) {
+  if (node.parametricType) {
+    utils.catchup(node.parametricType.range[0], state);
+    path.unshift(node);
+    traverse(node.parametricType, path, state);
+    path.shift();
+  }
+
+  // Render params.
+  if (node.params.length) {
+    path.unshift(node);
+    traverse(node.params, path, state);
+    path.shift();
+  } else {
+    // -3 is for ... of the rest.
+    utils.catchup(node.rest.range[0] - 3, state);
+  }
+  utils.catchupWhiteSpace(node.rest.range[1], state);
+
+  path.unshift(node);
+  traverse(node.body, path, state);
+  path.shift();
+
+  return false;
+}
+
+visitFunctionParamsWithRestParam.test = function(node, path, state) {
+  return _nodeIsFunctionWithRestParam(node);
+};
+
+function renderRestParamSetup(functionNode) {
+  return 'var ' + functionNode.rest.name + '=Array.prototype.slice.call(' +
+           'arguments,' +
+           functionNode.params.length +
+         ');';
+}
+
+function visitFunctionBodyWithRestParam(traverse, node, path, state) {
+  utils.catchup(node.range[0] + 1, state);
+  var parentNode = path[0];
+  utils.append(renderRestParamSetup(parentNode), state);
+  return true;
+}
+
+visitFunctionBodyWithRestParam.test = function(node, path, state) {
+  return node.type === Syntax.BlockStatement
+         && _nodeIsFunctionWithRestParam(path[0]);
+};
+
+exports.renderRestParamSetup = renderRestParamSetup;
+exports.visitorList = [
+  visitFunctionParamsWithRestParam,
+  visitFunctionBodyWithRestParam
+];
+
+},{"../src/utils":20,"esprima-fb":6}],27:[function(_dereq_,module,exports){
+/**
+ * Copyright 2013 Facebook, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/*jslint node:true*/
+
+/**
+ * @typechecks
+ */
+'use strict';
+
+var Syntax = _dereq_('esprima-fb').Syntax;
+var utils = _dereq_('../src/utils');
+
+/**
+ * http://people.mozilla.org/~jorendorff/es6-draft.html#sec-12.1.9
+ */
+function visitTemplateLiteral(traverse, node, path, state) {
+  var templateElements = node.quasis;
+
+  utils.append('(', state);
+  for (var ii = 0; ii < templateElements.length; ii++) {
+    var templateElement = templateElements[ii];
+    if (templateElement.value.raw !== '') {
+      utils.append(getCookedValue(templateElement), state);
+      if (!templateElement.tail) {
+        // + between element and substitution
+        utils.append(' + ', state);
+      }
+      // maintain line numbers
+      utils.move(templateElement.range[0], state);
+      utils.catchupNewlines(templateElement.range[1], state);
+    } else {  // templateElement.value.raw === ''
+      // Concatenat adjacent substitutions, e.g. `${x}${y}`. Empty templates
+      // appear before the first and after the last element - nothing to add in
+      // those cases.
+      if (ii > 0 && !templateElement.tail) {
+        // + between substitution and substitution
+        utils.append(' + ', state);
+      }
+    }
+
+    utils.move(templateElement.range[1], state);
+    if (!templateElement.tail) {
+      var substitution = node.expressions[ii];
+      if (substitution.type === Syntax.Identifier ||
+          substitution.type === Syntax.MemberExpression ||
+          substitution.type === Syntax.CallExpression) {
+        utils.catchup(substitution.range[1], state);
+      } else {
+        utils.append('(', state);
+        traverse(substitution, path, state);
+        utils.catchup(substitution.range[1], state);
+        utils.append(')', state);
+      }
+      // if next templateElement isn't empty...
+      if (templateElements[ii + 1].value.cooked !== '') {
+        utils.append(' + ', state);
+      }
+    }
+  }
+  utils.move(node.range[1], state);
+  utils.append(')', state);
+  return false;
+}
+
+visitTemplateLiteral.test = function(node, path, state) {
+  return node.type === Syntax.TemplateLiteral;
+};
+
+/**
+ * http://people.mozilla.org/~jorendorff/es6-draft.html#sec-12.2.6
+ */
+function visitTaggedTemplateExpression(traverse, node, path, state) {
+  var template = node.quasi;
+  var numQuasis = template.quasis.length;
+
+  // print the tag
+  utils.move(node.tag.range[0], state);
+  traverse(node.tag, path, state);
+  utils.catchup(node.tag.range[1], state);
+
+  // print array of template elements
+  utils.append('(function() { var siteObj = [', state);
+  for (var ii = 0; ii < numQuasis; ii++) {
+    utils.append(getCookedValue(template.quasis[ii]), state);
+    if (ii !== numQuasis - 1) {
+      utils.append(', ', state);
+    }
+  }
+  utils.append(']; siteObj.raw = [', state);
+  for (ii = 0; ii < numQuasis; ii++) {
+    utils.append(getRawValue(template.quasis[ii]), state);
+    if (ii !== numQuasis - 1) {
+      utils.append(', ', state);
+    }
+  }
+  utils.append(
+    ']; Object.freeze(siteObj.raw); Object.freeze(siteObj); return siteObj; }()',
+    state
+  );
+
+  // print substitutions
+  if (numQuasis > 1) {
+    for (ii = 0; ii < template.expressions.length; ii++) {
+      var expression = template.expressions[ii];
+      utils.append(', ', state);
+
+      // maintain line numbers by calling catchupWhiteSpace over the whole
+      // previous TemplateElement
+      utils.move(template.quasis[ii].range[0], state);
+      utils.catchupNewlines(template.quasis[ii].range[1], state);
+
+      utils.move(expression.range[0], state);
+      traverse(expression, path, state);
+      utils.catchup(expression.range[1], state);
+    }
+  }
+
+  // print blank lines to push the closing ) down to account for the final
+  // TemplateElement.
+  utils.catchupNewlines(node.range[1], state);
+
+  utils.append(')', state);
+
+  return false;
+}
+
+visitTaggedTemplateExpression.test = function(node, path, state) {
+  return node.type === Syntax.TaggedTemplateExpression;
+};
+
+function getCookedValue(templateElement) {
+  return JSON.stringify(templateElement.value.cooked);
+}
+
+function getRawValue(templateElement) {
+  return JSON.stringify(templateElement.value.raw);
+}
+
+exports.visitorList = [
+  visitTemplateLiteral,
+  visitTaggedTemplateExpression
+];
+
+},{"../src/utils":20,"esprima-fb":6}],28:[function(_dereq_,module,exports){
+/**
+ * Copyright 2013-2014 Facebook, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+/* jshint browser: true */
+/* jslint evil: true */
+
+'use strict';
+
+var buffer = _dereq_('buffer');
+var docblock = _dereq_('jstransform/src/docblock');
+var transform = _dereq_('jstransform').transform;
+var visitors = _dereq_('./fbtransform/visitors');
+
+var headEl;
+var dummyAnchor;
+var inlineScriptCount = 0;
+
+// The source-map library relies on Object.defineProperty, but IE8 doesn't
+// support it fully even with es5-sham. Indeed, es5-sham's defineProperty
+// throws when Object.prototype.__defineGetter__ is missing, so we skip building
+// the source map in that case.
+var supportsAccessors = Object.prototype.hasOwnProperty('__defineGetter__');
+
+/**
+ * Run provided code through jstransform.
+ *
+ * @param {string} source Original source code
+ * @param {object?} options Options to pass to jstransform
+ * @return {object} object as returned from jstransform
+ */
+function transformReact(source, options) {
+  // TODO: just use react-tools
+  var visitorList;
+  if (options && options.harmony) {
+    visitorList = visitors.getAllVisitors();
+  } else {
+    visitorList = visitors.transformVisitors.react;
+  }
+
+  return transform(visitorList, source, {
+    sourceMap: supportsAccessors
+  });
+}
+
+/**
+ * Eval provided source after transforming it.
+ *
+ * @param {string} source Original source code
+ * @param {object?} options Options to pass to jstransform
+ */
+function exec(source, options) {
+  return eval(transformReact(source, options).code);
+}
+
+/**
+ * This method returns a nicely formated line of code pointing to the exact
+ * location of the error `e`. The line is limited in size so big lines of code
+ * are also shown in a readable way.
+ *
+ * Example:
+ * ... x', overflow:'scroll'}} id={} onScroll={this.scroll} class=" ...
+ * ^
+ *
+ * @param {string} code The full string of code
+ * @param {Error} e The error being thrown
+ * @return {string} formatted message
+ * @internal
+ */
+function createSourceCodeErrorMessage(code, e) {
+  var sourceLines = code.split('\n');
+  var erroneousLine = sourceLines[e.lineNumber - 1];
+
+  // Removes any leading indenting spaces and gets the number of
+  // chars indenting the `erroneousLine`
+  var indentation = 0;
+  erroneousLine = erroneousLine.replace(/^\s+/, function(leadingSpaces) {
+    indentation = leadingSpaces.length;
+    return '';
+  });
+
+  // Defines the number of characters that are going to show
+  // before and after the erroneous code
+  var LIMIT = 30;
+  var errorColumn = e.column - indentation;
+
+  if (errorColumn > LIMIT) {
+    erroneousLine = '... ' + erroneousLine.slice(errorColumn - LIMIT);
+    errorColumn = 4 + LIMIT;
+  }
+  if (erroneousLine.length - errorColumn > LIMIT) {
+    erroneousLine = erroneousLine.slice(0, errorColumn + LIMIT) + ' ...';
+  }
+  var message = '\n\n' + erroneousLine + '\n';
+  message += new Array(errorColumn - 1).join(' ') + '^';
+  return message;
+}
+
+/**
+ * Actually transform the code.
+ *
+ * @param {string} code
+ * @param {string?} url
+ * @param {object?} options
+ * @return {string} The transformed code.
+ * @internal
+ */
+function transformCode(code, url, options) {
+  var jsx = docblock.parseAsObject(docblock.extract(code)).jsx;
+
+  if (jsx) {
+    try {
+      var transformed = transformReact(code, options);
+    } catch(e) {
+      e.message += '\n    at ';
+      if (url) {
+        if ('fileName' in e) {
+          // We set `fileName` if it's supported by this error object and
+          // a `url` was provided.
+          // The error will correctly point to `url` in Firefox.
+          e.fileName = url;
+        }
+        e.message += url + ':' + e.lineNumber + ':' + e.column;
+      } else {
+        e.message += location.href;
+      }
+      e.message += createSourceCodeErrorMessage(code, e);
+      throw e;
+    }
+
+    if (!transformed.sourceMap) {
+      return transformed.code;
+    }
+
+    var map = transformed.sourceMap.toJSON();
+    var source;
+    if (url == null) {
+      source = "Inline JSX script";
+      inlineScriptCount++;
+      if (inlineScriptCount > 1) {
+        source += ' (' + inlineScriptCount + ')';
+      }
+    } else if (dummyAnchor) {
+      // Firefox has problems when the sourcemap source is a proper URL with a
+      // protocol and hostname, so use the pathname. We could use just the
+      // filename, but hopefully using the full path will prevent potential
+      // issues where the same filename exists in multiple directories.
+      dummyAnchor.href = url;
+      source = dummyAnchor.pathname.substr(1);
+    }
+    map.sources = [source];
+    map.sourcesContent = [code];
+
+    return (
+      transformed.code +
+      '\n//# sourceMappingURL=data:application/json;base64,' +
+      buffer.Buffer(JSON.stringify(map)).toString('base64')
+    );
+  } else {
+    // TODO: warn that we found a script tag missing the docblock?
+    //       or warn and proceed anyway?
+    //       or warn, add it ourselves, and proceed anyway?
+    return code;
+  }
+}
+
+
+/**
+ * Appends a script element at the end of the <head> with the content of code,
+ * after transforming it.
+ *
+ * @param {string} code The original source code
+ * @param {string?} url Where the code came from. null if inline
+ * @param {object?} options Options to pass to jstransform
+ * @internal
+ */
+function run(code, url, options) {
+  var scriptEl = document.createElement('script');
+  scriptEl.text = transformCode(code, url, options);
+  headEl.appendChild(scriptEl);
+}
+
+/**
+ * Load script from the provided url and pass the content to the callback.
+ *
+ * @param {string} url The location of the script src
+ * @param {function} callback Function to call with the content of url
+ * @internal
+ */
+function load(url, callback) {
+  var xhr;
+  xhr = window.ActiveXObject ? new window.ActiveXObject('Microsoft.XMLHTTP')
+                             : new XMLHttpRequest();
+
+  // async, however scripts will be executed in the order they are in the
+  // DOM to mirror normal script loading.
+  xhr.open('GET', url, true);
+  if ('overrideMimeType' in xhr) {
+    xhr.overrideMimeType('text/plain');
+  }
+  xhr.onreadystatechange = function() {
+    if (xhr.readyState === 4) {
+      if (xhr.status === 0 || xhr.status === 200) {
+        callback(xhr.responseText, url);
+      } else {
+        throw new Error("Could not load " + url);
+      }
+    }
+  };
+  return xhr.send(null);
+}
+
+/**
+ * Loop over provided script tags and get the content, via innerHTML if an
+ * inline script, or by using XHR. Transforms are applied if needed. The scripts
+ * are executed in the order they are found on the page.
+ *
+ * @param {array} scripts The <script> elements to load and run.
+ * @internal
+ */
+function loadScripts(scripts) {
+  var result = scripts.map(function() {
+    return false;
+  });
+  var count = result.length;
+
+  function check() {
+    var script, i;
+
+    for (i = 0; i < count; i++) {
+      script = result[i];
+
+      if (script && !script.executed) {
+        run(script.content, script.url, script.options);
+        script.executed = true;
+      } else if (!script) {
+        break;
+      }
+    }
+  }
+
+  scripts.forEach(function(script, i) {
+    var options;
+    if (script.type.indexOf('harmony=true') !== -1) {
+      options = {
+        harmony: true
+      };
+    }
+
+    if (script.src) {
+      load(script.src, function(content, url) {
+        result[i] = {
+          executed: false,
+          content: content,
+          url: url,
+          options: options
+        };
+        check();
+      });
+    } else {
+      result[i] = {
+        executed: false,
+        content: script.innerHTML,
+        url: null,
+        options: options
+      };
+      check();
+    }
+  });
+}
+
+/**
+ * Find and run all script tags with type="text/jsx".
+ *
+ * @internal
+ */
+function runScripts() {
+  var scripts = document.getElementsByTagName('script');
+
+  // Array.prototype.slice cannot be used on NodeList on IE8
+  var jsxScripts = [];
+  for (var i = 0; i < scripts.length; i++) {
+    if (scripts.item(i).type.indexOf('text/jsx') !== -1) {
+      jsxScripts.push(scripts.item(i));
+    }
+  }
+
+  console.warn(
+    'You are using the in-browser JSX transformer. Be sure to precompile ' +
+    'your JSX for production - ' +
+    'http://facebook.github.io/react/docs/tooling-integration.html#jsx'
+  );
+
+  loadScripts(jsxScripts);
+}
+
+// Listen for load event if we're in a browser and then kick off finding and
+// running of scripts.
+if (typeof window !== "undefined" && window !== null) {
+  headEl = document.getElementsByTagName('head')[0];
+  dummyAnchor = document.createElement('a');
+
+  if (window.addEventListener) {
+    window.addEventListener('DOMContentLoaded', runScripts, false);
+  } else {
+    window.attachEvent('onload', runScripts);
+  }
+}
+
+module.exports = {
+  transform: transformReact,
+  exec: exec
+};
+
+},{"./fbtransform/visitors":32,"buffer":1,"jstransform":19,"jstransform/src/docblock":18}],29:[function(_dereq_,module,exports){
+/**
+ * Copyright 2013-2014 Facebook, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+/*global exports:true*/
+"use strict";
+
+var Syntax = _dereq_('esprima-fb').Syntax;
+var utils = _dereq_('jstransform/src/utils');
+
+var FALLBACK_TAGS = _dereq_('./xjs').knownTags;
+var renderXJSExpressionContainer =
+  _dereq_('./xjs').renderXJSExpressionContainer;
+var renderXJSLiteral = _dereq_('./xjs').renderXJSLiteral;
+var quoteAttrName = _dereq_('./xjs').quoteAttrName;
+
+var trimLeft = _dereq_('./xjs').trimLeft;
+
+/**
+ * Customized desugar processor.
+ *
+ * Currently: (Somewhat tailored to React)
+ * <X> </X> => X(null, null)
+ * <X prop="1" /> => X({prop: '1'}, null)
+ * <X prop="2"><Y /></X> => X({prop:'2'}, Y(null, null))
+ * <X prop="2"><Y /><Z /></X> => X({prop:'2'}, [Y(null, null), Z(null, null)])
+ *
+ * Exceptions to the simple rules above:
+ * if a property is named "class" it will be changed to "className" in the
+ * javascript since "class" is not a valid object key in javascript.
+ */
+
+var JSX_ATTRIBUTE_TRANSFORMS = {
+  cxName: function(attr) {
+    throw new Error(
+      "cxName is no longer supported, use className={cx(...)} instead"
+    );
+  }
+};
+
+/**
+ * Removes all non-whitespace/parenthesis characters
+ */
+var reNonWhiteParen = /([^\s\(\)])/g;
+function stripNonWhiteParen(value) {
+  return value.replace(reNonWhiteParen, '');
+}
+
+function visitReactTag(traverse, object, path, state) {
+  var jsxObjIdent = utils.getDocblock(state).jsx;
+  var openingElement = object.openingElement;
+  var nameObject = openingElement.name;
+  var attributesObject = openingElement.attributes;
+
+  utils.catchup(openingElement.range[0], state, trimLeft);
+
+  if (nameObject.type === Syntax.XJSNamespacedName && nameObject.namespace) {
+    throw new Error('Namespace tags are not supported. ReactJSX is not XML.');
+  }
+
+  // Only identifiers can be fallback tags or need quoting. We don't need to
+  // handle quoting for other types.
+  var didAddTag = false;
+
+  // Only identifiers can be fallback tags. XJSMemberExpressions are not.
+  if (nameObject.type === Syntax.XJSIdentifier) {
+    var tagName = nameObject.name;
+    var quotedTagName = quoteAttrName(tagName);
+
+    if (FALLBACK_TAGS.hasOwnProperty(tagName)) {
+      // "Properly" handle invalid identifiers, like <font-face>, which needs to
+      // be enclosed in quotes.
+      var predicate =
+        tagName === quotedTagName ?
+          ('.' + tagName) :
+          ('[' + quotedTagName + ']');
+      utils.append(jsxObjIdent + predicate, state);
+      utils.move(nameObject.range[1], state);
+      didAddTag = true;
+    } else if (tagName !== quotedTagName) {
+      // If we're in the case where we need to quote and but don't recognize the
+      // tag, throw.
+      throw new Error(
+        'Tags must be valid JS identifiers or a recognized special case. `<' +
+        tagName + '>` is not one of them.'
+      );
+    }
+  }
+
+  // Use utils.catchup in this case so we can easily handle XJSMemberExpressions
+  // which look like Foo.Bar.Baz. This also handles unhyphenated XJSIdentifiers
+  // that aren't fallback tags.
+  if (!didAddTag) {
+    utils.move(nameObject.range[0], state);
+    utils.catchup(nameObject.range[1], state);
+  }
+
+  utils.append('(', state);
+
+  var hasAttributes = attributesObject.length;
+
+  var hasAtLeastOneSpreadProperty = attributesObject.some(function(attr) {
+    return attr.type === Syntax.XJSSpreadAttribute;
+  });
+
+  // if we don't have any attributes, pass in null
+  if (hasAtLeastOneSpreadProperty) {
+    utils.append('Object.assign({', state);
+  } else if (hasAttributes) {
+    utils.append('{', state);
+  } else {
+    utils.append('null', state);
+  }
+
+  // keep track of if the previous attribute was a spread attribute
+  var previousWasSpread = false;
+
+  // write attributes
+  attributesObject.forEach(function(attr, index) {
+    var isLast = index === attributesObject.length - 1;
+
+    if (attr.type === Syntax.XJSSpreadAttribute) {
+      // Plus 1 to skip `{`.
+      utils.move(attr.range[0] + 1, state);
+
+      // Close the previous object or initial object
+      if (!previousWasSpread) {
+        utils.append('}, ', state);
+      }
+
+      // Move to the expression start, ignoring everything except parenthesis
+      // and whitespace.
+      utils.catchup(attr.argument.range[0], state, stripNonWhiteParen);
+
+      traverse(attr.argument, path, state);
+
+      utils.catchup(attr.argument.range[1], state);
+
+      // Move to the end, ignoring parenthesis and the closing `}`
+      utils.catchup(attr.range[1] - 1, state, stripNonWhiteParen);
+
+      if (!isLast) {
+        utils.append(', ', state);
+      }
+
+      utils.move(attr.range[1], state);
+
+      previousWasSpread = true;
+
+      return;
+    }
+
+    // If the next attribute is a spread, we're effective last in this object
+    if (!isLast) {
+      isLast = attributesObject[index + 1].type === Syntax.XJSSpreadAttribute;
+    }
+
+    if (attr.name.namespace) {
+      throw new Error(
+         'Namespace attributes are not supported. ReactJSX is not XML.');
+    }
+    var name = attr.name.name;
+
+    utils.catchup(attr.range[0], state, trimLeft);
+
+    if (previousWasSpread) {
+      utils.append('{', state);
+    }
+
+    utils.append(quoteAttrName(name), state);
+    utils.append(': ', state);
+
+    if (!attr.value) {
+      state.g.buffer += 'true';
+      state.g.position = attr.name.range[1];
+      if (!isLast) {
+        utils.append(', ', state);
+      }
+    } else {
+      utils.move(attr.name.range[1], state);
+      // Use catchupNewlines to skip over the '=' in the attribute
+      utils.catchupNewlines(attr.value.range[0], state);
+      if (JSX_ATTRIBUTE_TRANSFORMS.hasOwnProperty(attr.name.name)) {
+        utils.append(JSX_ATTRIBUTE_TRANSFORMS[attr.name.name](attr), state);
+        utils.move(attr.value.range[1], state);
+        if (!isLast) {
+          utils.append(', ', state);
+        }
+      } else if (attr.value.type === Syntax.Literal) {
+        renderXJSLiteral(attr.value, isLast, state);
+      } else {
+        renderXJSExpressionContainer(traverse, attr.value, isLast, path, state);
+      }
+    }
+
+    utils.catchup(attr.range[1], state, trimLeft);
+
+    previousWasSpread = false;
+
+  });
+
+  if (!openingElement.selfClosing) {
+    utils.catchup(openingElement.range[1] - 1, state, trimLeft);
+    utils.move(openingElement.range[1], state);
+  }
+
+  if (hasAttributes && !previousWasSpread) {
+    utils.append('}', state);
+  }
+
+  if (hasAtLeastOneSpreadProperty) {
+    utils.append(')', state);
+  }
+
+  // filter out whitespace
+  var childrenToRender = object.children.filter(function(child) {
+    return !(child.type === Syntax.Literal
+             && typeof child.value === 'string'
+             && child.value.match(/^[ \t]*[\r\n][ \t\r\n]*$/));
+  });
+  if (childrenToRender.length > 0) {
+    var lastRenderableIndex;
+
+    childrenToRender.forEach(function(child, index) {
+      if (child.type !== Syntax.XJSExpressionContainer ||
+          child.expression.type !== Syntax.XJSEmptyExpression) {
+        lastRenderableIndex = index;
+      }
+    });
+
+    if (lastRenderableIndex !== undefined) {
+      utils.append(', ', state);
+    }
+
+    childrenToRender.forEach(function(child, index) {
+      utils.catchup(child.range[0], state, trimLeft);
+
+      var isLast = index >= lastRenderableIndex;
+
+      if (child.type === Syntax.Literal) {
+        renderXJSLiteral(child, isLast, state);
+      } else if (child.type === Syntax.XJSExpressionContainer) {
+        renderXJSExpressionContainer(traverse, child, isLast, path, state);
+      } else {
+        traverse(child, path, state);
+        if (!isLast) {
+          utils.append(', ', state);
+        }
+      }
+
+      utils.catchup(child.range[1], state, trimLeft);
+    });
+  }
+
+  if (openingElement.selfClosing) {
+    // everything up to />
+    utils.catchup(openingElement.range[1] - 2, state, trimLeft);
+    utils.move(openingElement.range[1], state);
+  } else {
+    // everything up to </ sdflksjfd>
+    utils.catchup(object.closingElement.range[0], state, trimLeft);
+    utils.move(object.closingElement.range[1], state);
+  }
+
+  utils.append(')', state);
+  return false;
+}
+
+visitReactTag.test = function(object, path, state) {
+  // only run react when react @jsx namespace is specified in docblock
+  var jsx = utils.getDocblock(state).jsx;
+  return object.type === Syntax.XJSElement && jsx && jsx.length;
+};
+
+exports.visitorList = [
+  visitReactTag
+];
+
+},{"./xjs":31,"esprima-fb":6,"jstransform/src/utils":20}],30:[function(_dereq_,module,exports){
+/**
+ * Copyright 2013-2014 Facebook, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+/*global exports:true*/
+"use strict";
+
+var Syntax = _dereq_('esprima-fb').Syntax;
+var utils = _dereq_('jstransform/src/utils');
+
+function addDisplayName(displayName, object, state) {
+  if (object &&
+      object.type === Syntax.CallExpression &&
+      object.callee.type === Syntax.MemberExpression &&
+      object.callee.object.type === Syntax.Identifier &&
+      object.callee.object.name === 'React' &&
+      object.callee.property.type === Syntax.Identifier &&
+      object.callee.property.name === 'createClass' &&
+      object['arguments'].length === 1 &&
+      object['arguments'][0].type === Syntax.ObjectExpression) {
+    // Verify that the displayName property isn't already set
+    var properties = object['arguments'][0].properties;
+    var safe = properties.every(function(property) {
+      var value = property.key.type === Syntax.Identifier ?
+        property.key.name :
+        property.key.value;
+      return value !== 'displayName';
+    });
+
+    if (safe) {
+      utils.catchup(object['arguments'][0].range[0] + 1, state);
+      utils.append("displayName: '" + displayName + "',", state);
+    }
+  }
+}
+
+/**
+ * Transforms the following:
+ *
+ * var MyComponent = React.createClass({
+ *    render: ...
+ * });
+ *
+ * into:
+ *
+ * var MyComponent = React.createClass({
+ *    displayName: 'MyComponent',
+ *    render: ...
+ * });
+ *
+ * Also catches:
+ *
+ * MyComponent = React.createClass(...);
+ * exports.MyComponent = React.createClass(...);
+ * module.exports = {MyComponent: React.createClass(...)};
+ */
+function visitReactDisplayName(traverse, object, path, state) {
+  var left, right;
+
+  if (object.type === Syntax.AssignmentExpression) {
+    left = object.left;
+    right = object.right;
+  } else if (object.type === Syntax.Property) {
+    left = object.key;
+    right = object.value;
+  } else if (object.type === Syntax.VariableDeclarator) {
+    left = object.id;
+    right = object.init;
+  }
+
+  if (left && left.type === Syntax.MemberExpression) {
+    left = left.property;
+  }
+  if (left && left.type === Syntax.Identifier) {
+    addDisplayName(left.name, right, state);
+  }
+}
+
+/**
+ * Will only run on @jsx files for now.
+ */
+visitReactDisplayName.test = function(object, path, state) {
+  if (utils.getDocblock(state).jsx) {
+    return (
+      object.type === Syntax.AssignmentExpression ||
+      object.type === Syntax.Property ||
+      object.type === Syntax.VariableDeclarator
+    );
+  } else {
+    return false;
+  }
+};
+
+exports.visitorList = [
+  visitReactDisplayName
+];
+
+},{"esprima-fb":6,"jstransform/src/utils":20}],31:[function(_dereq_,module,exports){
+/**
+ * Copyright 2013-2014 Facebook, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+/*global exports:true*/
+"use strict";
+var Syntax = _dereq_('esprima-fb').Syntax;
+var utils = _dereq_('jstransform/src/utils');
+
+var knownTags = {
+  a: true,
+  abbr: true,
+  address: true,
+  applet: true,
+  area: true,
+  article: true,
+  aside: true,
+  audio: true,
+  b: true,
+  base: true,
+  bdi: true,
+  bdo: true,
+  big: true,
+  blockquote: true,
+  body: true,
+  br: true,
+  button: true,
+  canvas: true,
+  caption: true,
+  circle: true,
+  cite: true,
+  code: true,
+  col: true,
+  colgroup: true,
+  command: true,
+  data: true,
+  datalist: true,
+  dd: true,
+  defs: true,
+  del: true,
+  details: true,
+  dfn: true,
+  dialog: true,
+  div: true,
+  dl: true,
+  dt: true,
+  ellipse: true,
+  em: true,
+  embed: true,
+  fieldset: true,
+  figcaption: true,
+  figure: true,
+  footer: true,
+  form: true,
+  g: true,
+  h1: true,
+  h2: true,
+  h3: true,
+  h4: true,
+  h5: true,
+  h6: true,
+  head: true,
+  header: true,
+  hgroup: true,
+  hr: true,
+  html: true,
+  i: true,
+  iframe: true,
+  img: true,
+  input: true,
+  ins: true,
+  kbd: true,
+  keygen: true,
+  label: true,
+  legend: true,
+  li: true,
+  line: true,
+  linearGradient: true,
+  link: true,
+  main: true,
+  map: true,
+  mark: true,
+  marquee: true,
+  mask: false,
+  menu: true,
+  menuitem: true,
+  meta: true,
+  meter: true,
+  nav: true,
+  noscript: true,
+  object: true,
+  ol: true,
+  optgroup: true,
+  option: true,
+  output: true,
+  p: true,
+  param: true,
+  path: true,
+  pattern: false,
+  polygon: true,
+  polyline: true,
+  pre: true,
+  progress: true,
+  q: true,
+  radialGradient: true,
+  rect: true,
+  rp: true,
+  rt: true,
+  ruby: true,
+  s: true,
+  samp: true,
+  script: true,
+  section: true,
+  select: true,
+  small: true,
+  source: true,
+  span: true,
+  stop: true,
+  strong: true,
+  style: true,
+  sub: true,
+  summary: true,
+  sup: true,
+  svg: true,
+  table: true,
+  tbody: true,
+  td: true,
+  text: true,
+  textarea: true,
+  tfoot: true,
+  th: true,
+  thead: true,
+  time: true,
+  title: true,
+  tr: true,
+  track: true,
+  tspan: true,
+  u: true,
+  ul: true,
+  'var': true,
+  video: true,
+  wbr: true
+};
+
+function renderXJSLiteral(object, isLast, state, start, end) {
+  var lines = object.value.split(/\r\n|\n|\r/);
+
+  if (start) {
+    utils.append(start, state);
+  }
+
+  var lastNonEmptyLine = 0;
+
+  lines.forEach(function (line, index) {
+    if (line.match(/[^ \t]/)) {
+      lastNonEmptyLine = index;
+    }
+  });
+
+  lines.forEach(function (line, index) {
+    var isFirstLine = index === 0;
+    var isLastLine = index === lines.length - 1;
+    var isLastNonEmptyLine = index === lastNonEmptyLine;
+
+    // replace rendered whitespace tabs with spaces
+    var trimmedLine = line.replace(/\t/g, ' ');
+
+    // trim whitespace touching a newline
+    if (!isFirstLine) {
+      trimmedLine = trimmedLine.replace(/^[ ]+/, '');
+    }
+    if (!isLastLine) {
+      trimmedLine = trimmedLine.replace(/[ ]+$/, '');
+    }
+
+    if (!isFirstLine) {
+      utils.append(line.match(/^[ \t]*/)[0], state);
+    }
+
+    if (trimmedLine || isLastNonEmptyLine) {
+      utils.append(
+        JSON.stringify(trimmedLine) +
+        (!isLastNonEmptyLine ? " + ' ' +" : ''),
+        state);
+
+      if (isLastNonEmptyLine) {
+        if (end) {
+          utils.append(end, state);
+        }
+        if (!isLast) {
+          utils.append(', ', state);
+        }
+      }
+
+      // only restore tail whitespace if line had literals
+      if (trimmedLine && !isLastLine) {
+        utils.append(line.match(/[ \t]*$/)[0], state);
+      }
+    }
+
+    if (!isLastLine) {
+      utils.append('\n', state);
+    }
+  });
+
+  utils.move(object.range[1], state);
+}
+
+function renderXJSExpressionContainer(traverse, object, isLast, path, state) {
+  // Plus 1 to skip `{`.
+  utils.move(object.range[0] + 1, state);
+  traverse(object.expression, path, state);
+
+  if (!isLast && object.expression.type !== Syntax.XJSEmptyExpression) {
+    // If we need to append a comma, make sure to do so after the expression.
+    utils.catchup(object.expression.range[1], state, trimLeft);
+    utils.append(', ', state);
+  }
+
+  // Minus 1 to skip `}`.
+  utils.catchup(object.range[1] - 1, state, trimLeft);
+  utils.move(object.range[1], state);
+  return false;
+}
+
+function quoteAttrName(attr) {
+  // Quote invalid JS identifiers.
+  if (!/^[a-z_$][a-z\d_$]*$/i.test(attr)) {
+    return "'" + attr + "'";
+  }
+  return attr;
+}
+
+function trimLeft(value) {
+  return value.replace(/^[ ]+/, '');
+}
+
+exports.knownTags = knownTags;
+exports.renderXJSExpressionContainer = renderXJSExpressionContainer;
+exports.renderXJSLiteral = renderXJSLiteral;
+exports.quoteAttrName = quoteAttrName;
+exports.trimLeft = trimLeft;
+
+},{"esprima-fb":6,"jstransform/src/utils":20}],32:[function(_dereq_,module,exports){
+/*global exports:true*/
+var es6ArrowFunctions = _dereq_('jstransform/visitors/es6-arrow-function-visitors');
+var es6Classes = _dereq_('jstransform/visitors/es6-class-visitors');
+var es6Destructuring = _dereq_('jstransform/visitors/es6-destructuring-visitors');
+var es6ObjectConciseMethod = _dereq_('jstransform/visitors/es6-object-concise-method-visitors');
+var es6ObjectShortNotation = _dereq_('jstransform/visitors/es6-object-short-notation-visitors');
+var es6RestParameters = _dereq_('jstransform/visitors/es6-rest-param-visitors');
+var es6Templates = _dereq_('jstransform/visitors/es6-template-visitors');
+var react = _dereq_('./transforms/react');
+var reactDisplayName = _dereq_('./transforms/reactDisplayName');
+
+/**
+ * Map from transformName => orderedListOfVisitors.
+ */
+var transformVisitors = {
+  'es6-arrow-functions': es6ArrowFunctions.visitorList,
+  'es6-classes': es6Classes.visitorList,
+  'es6-destructuring': es6Destructuring.visitorList,
+  'es6-object-concise-method': es6ObjectConciseMethod.visitorList,
+  'es6-object-short-notation': es6ObjectShortNotation.visitorList,
+  'es6-rest-params': es6RestParameters.visitorList,
+  'es6-templates': es6Templates.visitorList,
+  'react': react.visitorList.concat(reactDisplayName.visitorList)
+};
+
+/**
+ * Specifies the order in which each transform should run.
+ */
+var transformRunOrder = [
+  'es6-arrow-functions',
+  'es6-object-concise-method',
+  'es6-object-short-notation',
+  'es6-classes',
+  'es6-rest-params',
+  'es6-templates',
+  'es6-destructuring',
+  'react'
+];
+
+/**
+ * Given a list of transform names, return the ordered list of visitors to be
+ * passed to the transform() function.
+ *
+ * @param {array?} excludes
+ * @return {array}
+ */
+function getAllVisitors(excludes) {
+  var ret = [];
+  for (var i = 0, il = transformRunOrder.length; i < il; i++) {
+    if (!excludes || excludes.indexOf(transformRunOrder[i]) === -1) {
+      ret = ret.concat(transformVisitors[transformRunOrder[i]]);
+    }
+  }
+  return ret;
+}
+
+exports.getAllVisitors = getAllVisitors;
+exports.transformVisitors = transformVisitors;
+
+},{"./transforms/react":29,"./transforms/reactDisplayName":30,"jstransform/visitors/es6-arrow-function-visitors":21,"jstransform/visitors/es6-class-visitors":22,"jstransform/visitors/es6-destructuring-visitors":23,"jstransform/visitors/es6-object-concise-method-visitors":24,"jstransform/visitors/es6-object-short-notation-visitors":25,"jstransform/visitors/es6-rest-param-visitors":26,"jstransform/visitors/es6-template-visitors":27}]},{},[28])
+(28)
+});
\ No newline at end of file