diff --git a/tools/doc/node_modules/.bin/esparse b/tools/doc/node_modules/.bin/esparse
new file mode 120000
index 00000000000000..7423b18b24efb0
--- /dev/null
+++ b/tools/doc/node_modules/.bin/esparse
@@ -0,0 +1 @@
+../esprima/bin/esparse.js
\ No newline at end of file
diff --git a/tools/doc/node_modules/.bin/esvalidate b/tools/doc/node_modules/.bin/esvalidate
new file mode 120000
index 00000000000000..16069effbc99a3
--- /dev/null
+++ b/tools/doc/node_modules/.bin/esvalidate
@@ -0,0 +1 @@
+../esprima/bin/esvalidate.js
\ No newline at end of file
diff --git a/tools/doc/node_modules/.bin/js-yaml b/tools/doc/node_modules/.bin/js-yaml
new file mode 120000
index 00000000000000..9dbd010d470368
--- /dev/null
+++ b/tools/doc/node_modules/.bin/js-yaml
@@ -0,0 +1 @@
+../js-yaml/bin/js-yaml.js
\ No newline at end of file
diff --git a/tools/doc/node_modules/argparse/CHANGELOG.md b/tools/doc/node_modules/argparse/CHANGELOG.md
new file mode 100644
index 00000000000000..61405ebf22c1be
--- /dev/null
+++ b/tools/doc/node_modules/argparse/CHANGELOG.md
@@ -0,0 +1,167 @@
+1.0.7 / 2016-03-17
+------------------
+
+- Teach `addArgument` to accept string arg names. #97, @tomxtobin.
+
+
+1.0.6 / 2016-02-06
+------------------
+
+- Maintenance: moved to eslint & updated CS.
+
+
+1.0.5 / 2016-02-05
+------------------
+
+- Removed lodash dependency to significantly reduce install size.
+  Thanks to @mourner.
+
+
+1.0.4 / 2016-01-17
+------------------
+
+- Maintenance: lodash update to 4.0.0.
+
+
+1.0.3 / 2015-10-27
+------------------
+
+- Fix parse `=` in args: `--examplepath="C:\myfolder\env=x64"`. #84, @CatWithApple.
+
+
+1.0.2 / 2015-03-22
+------------------
+
+- Relaxed lodash version dependency.
+
+
+1.0.1 / 2015-02-20
+------------------
+
+- Changed dependencies to be compatible with ancient nodejs.
+
+
+1.0.0 / 2015-02-19
+------------------
+
+- Maintenance release.
+- Replaced `underscore` with `lodash`.
+- Bumped version to 1.0.0 to better reflect semver meaning.
+- HISTORY.md -> CHANGELOG.md
+
+
+0.1.16 / 2013-12-01
+-------------------
+
+- Maintenance release. Updated dependencies and docs.
+
+
+0.1.15 / 2013-05-13
+-------------------
+
+- Fixed #55, @trebor89
+
+
+0.1.14 / 2013-05-12
+-------------------
+
+- Fixed #62, @maxtaco
+
+
+0.1.13 / 2013-04-08
+-------------------
+
+- Added `.npmignore` to reduce package size
+
+
+0.1.12 / 2013-02-10
+-------------------
+
+- Fixed conflictHandler (#46), @hpaulj
+
+
+0.1.11 / 2013-02-07
+-------------------
+
+- Multiple bugfixes, @hpaulj
+- Added 70+ tests (ported from python), @hpaulj
+- Added conflictHandler, @applepicke
+- Added fromfilePrefixChar, @hpaulj
+
+
+0.1.10 / 2012-12-30
+-------------------
+
+- Added [mutual exclusion](http://docs.python.org/dev/library/argparse.html#mutual-exclusion)
+  support, thanks to @hpaulj
+- Fixed options check for `storeConst` & `appendConst` actions, thanks to @hpaulj
+
+
+0.1.9 / 2012-12-27
+------------------
+
+- Fixed option dest interferens with other options (issue #23), thanks to @hpaulj
+- Fixed default value behavior with `*` positionals, thanks to @hpaulj
+- Improve `getDefault()` behavior, thanks to @hpaulj
+- Imrove negative argument parsing, thanks to @hpaulj
+
+
+0.1.8 / 2012-12-01
+------------------
+
+- Fixed parser parents (issue #19), thanks to @hpaulj
+- Fixed negative argument parse (issue #20), thanks to @hpaulj
+
+
+0.1.7 / 2012-10-14
+------------------
+
+- Fixed 'choices' argument parse (issue #16)
+- Fixed stderr output (issue #15)
+
+
+0.1.6 / 2012-09-09
+------------------
+
+- Fixed check for conflict of options (thanks to @tomxtobin)
+
+
+0.1.5 / 2012-09-03
+------------------
+
+- Fix parser #setDefaults method (thanks to @tomxtobin)
+
+
+0.1.4 / 2012-07-30
+------------------
+
+- Fixed pseudo-argument support (thanks to @CGamesPlay)
+- Fixed addHelp default (should be true), if not set (thanks to @benblank)
+
+
+0.1.3 / 2012-06-27
+------------------
+
+- Fixed formatter api name: Formatter -> HelpFormatter
+
+
+0.1.2 / 2012-05-29
+------------------
+
+- Added basic tests
+- Removed excess whitespace in help
+- Fixed error reporting, when parcer with subcommands
+  called with empty arguments
+
+
+0.1.1 / 2012-05-23
+------------------
+
+- Fixed line wrapping in help formatter
+- Added better error reporting on invalid arguments
+
+
+0.1.0 / 2012-05-16
+------------------
+
+- First release.
diff --git a/tools/doc/node_modules/argparse/LICENSE b/tools/doc/node_modules/argparse/LICENSE
new file mode 100644
index 00000000000000..1afdae5584056a
--- /dev/null
+++ b/tools/doc/node_modules/argparse/LICENSE
@@ -0,0 +1,21 @@
+(The MIT License)
+
+Copyright (C) 2012 by Vitaly Puzrin
+
+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.
diff --git a/tools/doc/node_modules/argparse/README.md b/tools/doc/node_modules/argparse/README.md
new file mode 100644
index 00000000000000..2d0bcab435c25c
--- /dev/null
+++ b/tools/doc/node_modules/argparse/README.md
@@ -0,0 +1,253 @@
+argparse
+========
+
+[![Build Status](https://secure.travis-ci.org/nodeca/argparse.png?branch=master)](http://travis-ci.org/nodeca/argparse)
+[![NPM version](https://img.shields.io/npm/v/argparse.svg)](https://www.npmjs.org/package/argparse)
+
+CLI arguments parser for node.js. Javascript port of python's
+[argparse](http://docs.python.org/dev/library/argparse.html) module
+(original version 3.2). That's a full port, except some very rare options,
+recorded in issue tracker.
+
+**NB. Difference with original.**
+
+- Method names changed to camelCase. See [generated docs](http://nodeca.github.com/argparse/).
+- Use `defaultValue` instead of `default`.
+
+
+Example
+=======
+
+test.js file:
+
+```javascript
+#!/usr/bin/env node
+'use strict';
+
+var ArgumentParser = require('../lib/argparse').ArgumentParser;
+var parser = new ArgumentParser({
+  version: '0.0.1',
+  addHelp:true,
+  description: 'Argparse example'
+});
+parser.addArgument(
+  [ '-f', '--foo' ],
+  {
+    help: 'foo bar'
+  }
+);
+parser.addArgument(
+  [ '-b', '--bar' ],
+  {
+    help: 'bar foo'
+  }
+);
+parser.addArgument(
+  '--baz',
+  {
+    help: 'baz bar'
+  }
+);
+var args = parser.parseArgs();
+console.dir(args);
+```
+
+Display help:
+
+```
+$ ./test.js -h
+usage: example.js [-h] [-v] [-f FOO] [-b BAR] [--baz BAZ]
+
+Argparse example
+
+Optional arguments:
+  -h, --help         Show this help message and exit.
+  -v, --version      Show program's version number and exit.
+  -f FOO, --foo FOO  foo bar
+  -b BAR, --bar BAR  bar foo
+  --baz BAZ          baz bar
+```
+
+Parse arguments:
+
+```
+$ ./test.js -f=3 --bar=4 --baz 5
+{ foo: '3', bar: '4', baz: '5' }
+```
+
+More [examples](https://github.com/nodeca/argparse/tree/master/examples).
+
+
+ArgumentParser objects
+======================
+
+```
+new ArgumentParser({paramters hash});
+```
+
+Creates a new ArgumentParser object.
+
+**Supported params:**
+
+- ```description``` - Text to display before the argument help.
+- ```epilog``` - Text to display after the argument help.
+- ```addHelp``` - Add a -h/–help option to the parser. (default: true)
+- ```argumentDefault``` - Set the global default value for arguments. (default: null)
+- ```parents``` - A list of ArgumentParser objects whose arguments should also be included.
+- ```prefixChars``` - The set of characters that prefix optional arguments. (default: ‘-‘)
+- ```formatterClass``` - A class for customizing the help output.
+- ```prog``` - The name of the program (default: `path.basename(process.argv[1])`)
+- ```usage``` - The string describing the program usage (default: generated)
+- ```conflictHandler``` - Usually unnecessary, defines strategy for resolving conflicting optionals.
+
+**Not supportied yet**
+
+- ```fromfilePrefixChars``` - The set of characters that prefix files from which additional arguments should be read.
+
+
+Details in [original ArgumentParser guide](http://docs.python.org/dev/library/argparse.html#argumentparser-objects)
+
+
+addArgument() method
+====================
+
+```
+ArgumentParser.addArgument(name or flag or [name] or [flags...], {options})
+```
+
+Defines how a single command-line argument should be parsed.
+
+- ```name or flag or [name] or [flags...]``` - Either a positional name
+  (e.g., `'foo'`), a single option (e.g., `'-f'` or `'--foo'`), an array
+  of a single positional name (e.g., `['foo']`), or an array of options
+  (e.g., `['-f', '--foo']`).
+
+Options:
+
+- ```action``` - The basic type of action to be taken when this argument is encountered at the command line.
+- ```nargs```- The number of command-line arguments that should be consumed.
+- ```constant``` - A constant value required by some action and nargs selections.
+- ```defaultValue``` - The value produced if the argument is absent from the command line.
+- ```type``` - The type to which the command-line argument should be converted.
+- ```choices``` - A container of the allowable values for the argument.
+- ```required``` - Whether or not the command-line option may be omitted (optionals only).
+- ```help``` - A brief description of what the argument does.
+- ```metavar``` - A name for the argument in usage messages.
+- ```dest``` - The name of the attribute to be added to the object returned by parseArgs().
+
+Details in [original add_argument guide](http://docs.python.org/dev/library/argparse.html#the-add-argument-method)
+
+
+Action (some details)
+================
+
+ArgumentParser objects associate command-line arguments with actions.
+These actions can do just about anything with the command-line arguments associated
+with them, though most actions simply add an attribute to the object returned by
+parseArgs(). The action keyword argument specifies how the command-line arguments
+should be handled. The supported actions are:
+
+- ```store``` - Just stores the argument’s value. This is the default action.
+- ```storeConst``` - Stores value, specified by the const keyword argument.
+  (Note that the const keyword argument defaults to the rather unhelpful None.)
+  The 'storeConst' action is most commonly used with optional arguments, that
+  specify some sort of flag.
+- ```storeTrue``` and ```storeFalse``` - Stores values True and False
+  respectively. These are special cases of 'storeConst'.
+- ```append``` - Stores a list, and appends each argument value to the list.
+  This is useful to allow an option to be specified multiple times.
+- ```appendConst``` - Stores a list, and appends value, specified by the
+  const keyword argument to the list. (Note, that the const keyword argument defaults
+  is None.) The 'appendConst' action is typically used when multiple arguments need
+  to store constants to the same list.
+- ```count``` - Counts the number of times a keyword argument occurs. For example,
+  used for increasing verbosity levels.
+- ```help``` - Prints a complete help message for all the options in the current
+  parser and then exits. By default a help action is automatically added to the parser.
+  See ArgumentParser for details of how the output is created.
+- ```version``` - Prints version information and exit. Expects a `version=`
+  keyword argument in the addArgument() call.
+
+Details in [original action guide](http://docs.python.org/dev/library/argparse.html#action)
+
+
+Sub-commands
+============
+
+ArgumentParser.addSubparsers()
+
+Many programs split their functionality into a number of sub-commands, for
+example, the svn program can invoke sub-commands like `svn checkout`, `svn update`,
+and `svn commit`. Splitting up functionality this way can be a particularly good
+idea when a program performs several different functions which require different
+kinds of command-line arguments. `ArgumentParser` supports creation of such
+sub-commands with `addSubparsers()` method. The `addSubparsers()` method is
+normally called with no arguments and returns an special action object.
+This object has a single method `addParser()`, which takes a command name and
+any `ArgumentParser` constructor arguments, and returns an `ArgumentParser` object
+that can be modified as usual.
+
+Example:
+
+sub_commands.js
+```javascript
+#!/usr/bin/env node
+'use strict';
+
+var ArgumentParser = require('../lib/argparse').ArgumentParser;
+var parser = new ArgumentParser({
+  version: '0.0.1',
+  addHelp:true,
+  description: 'Argparse examples: sub-commands',
+});
+
+var subparsers = parser.addSubparsers({
+  title:'subcommands',
+  dest:"subcommand_name"
+});
+
+var bar = subparsers.addParser('c1', {addHelp:true});
+bar.addArgument(
+  [ '-f', '--foo' ],
+  {
+    action: 'store',
+    help: 'foo3 bar3'
+  }
+);
+var bar = subparsers.addParser(
+  'c2',
+  {aliases:['co'], addHelp:true}
+);
+bar.addArgument(
+  [ '-b', '--bar' ],
+  {
+    action: 'store',
+    type: 'int',
+    help: 'foo3 bar3'
+  }
+);
+
+var args = parser.parseArgs();
+console.dir(args);
+
+```
+
+Details in [original sub-commands guide](http://docs.python.org/dev/library/argparse.html#sub-commands)
+
+
+Contributors
+============
+
+- [Eugene Shkuropat](https://github.com/shkuropat)
+- [Paul Jacobson](https://github.com/hpaulj)
+
+[others](https://github.com/nodeca/argparse/graphs/contributors)
+
+License
+=======
+
+Copyright (c) 2012 [Vitaly Puzrin](https://github.com/puzrin).
+Released under the MIT license. See
+[LICENSE](https://github.com/nodeca/argparse/blob/master/LICENSE) for details.
+
+
diff --git a/tools/doc/node_modules/argparse/index.js b/tools/doc/node_modules/argparse/index.js
new file mode 100644
index 00000000000000..3bbc143200483c
--- /dev/null
+++ b/tools/doc/node_modules/argparse/index.js
@@ -0,0 +1,3 @@
+'use strict';
+
+module.exports = require('./lib/argparse');
diff --git a/tools/doc/node_modules/argparse/lib/action.js b/tools/doc/node_modules/argparse/lib/action.js
new file mode 100644
index 00000000000000..ef359899328aa5
--- /dev/null
+++ b/tools/doc/node_modules/argparse/lib/action.js
@@ -0,0 +1,146 @@
+/**
+ * class Action
+ *
+ * Base class for all actions
+ * Do not call in your code, use this class only for inherits your own action
+ *
+ * Information about how to convert command line strings to Javascript objects.
+ * Action objects are used by an ArgumentParser to represent the information
+ * needed to parse a single argument from one or more strings from the command
+ * line. The keyword arguments to the Action constructor are also all attributes
+ * of Action instances.
+ *
+ * #####Alowed keywords:
+ *
+ * - `store`
+ * - `storeConstant`
+ * - `storeTrue`
+ * - `storeFalse`
+ * - `append`
+ * - `appendConstant`
+ * - `count`
+ * - `help`
+ * - `version`
+ *
+ * Information about action options see [[Action.new]]
+ *
+ * See also [original guide](http://docs.python.org/dev/library/argparse.html#action)
+ *
+ **/
+
+'use strict';
+
+
+// Constants
+var c = require('./const');
+
+
+/**
+ * new Action(options)
+ *
+ * Base class for all actions. Used only for inherits
+ *
+ *
+ * ##### Options:
+ *
+ * - `optionStrings`  A list of command-line option strings for the action.
+ * - `dest`  Attribute to hold the created object(s)
+ * - `nargs`  The number of command-line arguments that should be consumed.
+ * By default, one argument will be consumed and a single value will be
+ * produced.
+ * - `constant`  Default value for an action with no value.
+ * - `defaultValue`  The value to be produced if the option is not specified.
+ * - `type`  Cast to 'string'|'int'|'float'|'complex'|function (string). If
+ * None, 'string'.
+ * - `choices`  The choices available.
+ * - `required`  True if the action must always be specified at the command
+ * line.
+ * - `help`  The help describing the argument.
+ * - `metavar`  The name to be used for the option's argument with the help
+ * string. If None, the 'dest' value will be used as the name.
+ *
+ * ##### nargs supported values:
+ *
+ * - `N` (an integer) consumes N arguments (and produces a list)
+ * - `?`  consumes zero or one arguments
+ * - `*` consumes zero or more arguments (and produces a list)
+ * - `+` consumes one or more arguments (and produces a list)
+ *
+ * Note: that the difference between the default and nargs=1 is that with the
+ * default, a single value will be produced, while with nargs=1, a list
+ * containing a single value will be produced.
+ **/
+var Action = module.exports = function Action(options) {
+  options = options || {};
+  this.optionStrings = options.optionStrings || [];
+  this.dest = options.dest;
+  this.nargs = typeof options.nargs !== 'undefined' ? options.nargs : null;
+  this.constant = typeof options.constant !== 'undefined' ? options.constant : null;
+  this.defaultValue = options.defaultValue;
+  this.type = typeof options.type !== 'undefined' ? options.type : null;
+  this.choices = typeof options.choices !== 'undefined' ? options.choices : null;
+  this.required = typeof options.required !== 'undefined' ? options.required : false;
+  this.help = typeof options.help !== 'undefined' ? options.help : null;
+  this.metavar = typeof options.metavar !== 'undefined' ? options.metavar : null;
+
+  if (!(this.optionStrings instanceof Array)) {
+    throw new Error('optionStrings should be an array');
+  }
+  if (typeof this.required !== 'undefined' && typeof this.required !== 'boolean') {
+    throw new Error('required should be a boolean');
+  }
+};
+
+/**
+ * Action#getName -> String
+ *
+ * Tells action name
+ **/
+Action.prototype.getName = function () {
+  if (this.optionStrings.length > 0) {
+    return this.optionStrings.join('/');
+  } else if (this.metavar !== null && this.metavar !== c.SUPPRESS) {
+    return this.metavar;
+  } else if (typeof this.dest !== 'undefined' && this.dest !== c.SUPPRESS) {
+    return this.dest;
+  }
+  return null;
+};
+
+/**
+ * Action#isOptional -> Boolean
+ *
+ * Return true if optional
+ **/
+Action.prototype.isOptional = function () {
+  return !this.isPositional();
+};
+
+/**
+ * Action#isPositional -> Boolean
+ *
+ * Return true if positional
+ **/
+Action.prototype.isPositional = function () {
+  return (this.optionStrings.length === 0);
+};
+
+/**
+ * Action#call(parser, namespace, values, optionString) -> Void
+ * - parser (ArgumentParser): current parser
+ * - namespace (Namespace): namespace for output data
+ * - values (Array): parsed values
+ * - optionString (Array): input option string(not parsed)
+ *
+ * Call the action. Should be implemented in inherited classes
+ *
+ * ##### Example
+ *
+ *      ActionCount.prototype.call = function (parser, namespace, values, optionString) {
+ *        namespace.set(this.dest, (namespace[this.dest] || 0) + 1);
+ *      };
+ *
+ **/
+Action.prototype.call = function () {
+  throw new Error('.call() not defined');// Not Implemented error
+};
diff --git a/tools/doc/node_modules/argparse/lib/action/append.js b/tools/doc/node_modules/argparse/lib/action/append.js
new file mode 100644
index 00000000000000..b5da0de2327504
--- /dev/null
+++ b/tools/doc/node_modules/argparse/lib/action/append.js
@@ -0,0 +1,53 @@
+/*:nodoc:*
+ * class ActionAppend
+ *
+ * This action stores a list, and appends each argument value to the list.
+ * This is useful to allow an option to be specified multiple times.
+ * This class inherided from [[Action]]
+ *
+ **/
+
+'use strict';
+
+var util = require('util');
+
+var Action = require('../action');
+
+// Constants
+var c = require('../const');
+
+/*:nodoc:*
+ * new ActionAppend(options)
+ * - options (object): options hash see [[Action.new]]
+ *
+ * Note: options.nargs should be optional for constants
+ * and more then zero for other
+ **/
+var ActionAppend = module.exports = function ActionAppend(options) {
+  options = options || {};
+  if (this.nargs <= 0) {
+    throw new Error('nargs for append actions must be > 0; if arg ' +
+        'strings are not supplying the value to append, ' +
+        'the append const action may be more appropriate');
+  }
+  if (!!this.constant && this.nargs !== c.OPTIONAL) {
+    throw new Error('nargs must be OPTIONAL to supply const');
+  }
+  Action.call(this, options);
+};
+util.inherits(ActionAppend, Action);
+
+/*:nodoc:*
+ * ActionAppend#call(parser, namespace, values, optionString) -> Void
+ * - parser (ArgumentParser): current parser
+ * - namespace (Namespace): namespace for output data
+ * - values (Array): parsed values
+ * - optionString (Array): input option string(not parsed)
+ *
+ * Call the action. Save result in namespace object
+ **/
+ActionAppend.prototype.call = function (parser, namespace, values) {
+  var items = (namespace[this.dest] || []).slice();
+  items.push(values);
+  namespace.set(this.dest, items);
+};
diff --git a/tools/doc/node_modules/argparse/lib/action/append/constant.js b/tools/doc/node_modules/argparse/lib/action/append/constant.js
new file mode 100644
index 00000000000000..313f5d2efcb03f
--- /dev/null
+++ b/tools/doc/node_modules/argparse/lib/action/append/constant.js
@@ -0,0 +1,47 @@
+/*:nodoc:*
+ * class ActionAppendConstant
+ *
+ * This stores a list, and appends the value specified by
+ * the const keyword argument to the list.
+ * (Note that the const keyword argument defaults to null.)
+ * The 'appendConst' action is typically useful when multiple
+ * arguments need to store constants to the same list.
+ *
+ * This class inherited from [[Action]]
+ **/
+
+'use strict';
+
+var util = require('util');
+
+var Action = require('../../action');
+
+/*:nodoc:*
+ * new ActionAppendConstant(options)
+ * - options (object): options hash see [[Action.new]]
+ *
+ **/
+var ActionAppendConstant = module.exports = function ActionAppendConstant(options) {
+  options = options || {};
+  options.nargs = 0;
+  if (typeof options.constant === 'undefined') {
+    throw new Error('constant option is required for appendAction');
+  }
+  Action.call(this, options);
+};
+util.inherits(ActionAppendConstant, Action);
+
+/*:nodoc:*
+ * ActionAppendConstant#call(parser, namespace, values, optionString) -> Void
+ * - parser (ArgumentParser): current parser
+ * - namespace (Namespace): namespace for output data
+ * - values (Array): parsed values
+ * - optionString (Array): input option string(not parsed)
+ *
+ * Call the action. Save result in namespace object
+ **/
+ActionAppendConstant.prototype.call = function (parser, namespace) {
+  var items = [].concat(namespace[this.dest] || []);
+  items.push(this.constant);
+  namespace.set(this.dest, items);
+};
diff --git a/tools/doc/node_modules/argparse/lib/action/count.js b/tools/doc/node_modules/argparse/lib/action/count.js
new file mode 100644
index 00000000000000..d6a5899d07ef24
--- /dev/null
+++ b/tools/doc/node_modules/argparse/lib/action/count.js
@@ -0,0 +1,40 @@
+/*:nodoc:*
+ * class ActionCount
+ *
+ * This counts the number of times a keyword argument occurs.
+ * For example, this is useful for increasing verbosity levels
+ *
+ * This class inherided from [[Action]]
+ *
+ **/
+'use strict';
+
+var util = require('util');
+
+var Action = require('../action');
+
+/*:nodoc:*
+ * new ActionCount(options)
+ * - options (object): options hash see [[Action.new]]
+ *
+ **/
+var ActionCount = module.exports = function ActionCount(options) {
+  options = options || {};
+  options.nargs = 0;
+
+  Action.call(this, options);
+};
+util.inherits(ActionCount, Action);
+
+/*:nodoc:*
+ * ActionCount#call(parser, namespace, values, optionString) -> Void
+ * - parser (ArgumentParser): current parser
+ * - namespace (Namespace): namespace for output data
+ * - values (Array): parsed values
+ * - optionString (Array): input option string(not parsed)
+ *
+ * Call the action. Save result in namespace object
+ **/
+ActionCount.prototype.call = function (parser, namespace) {
+  namespace.set(this.dest, (namespace[this.dest] || 0) + 1);
+};
diff --git a/tools/doc/node_modules/argparse/lib/action/help.js b/tools/doc/node_modules/argparse/lib/action/help.js
new file mode 100644
index 00000000000000..b40e05a6f0b3eb
--- /dev/null
+++ b/tools/doc/node_modules/argparse/lib/action/help.js
@@ -0,0 +1,47 @@
+/*:nodoc:*
+ * class ActionHelp
+ *
+ * Support action for printing help
+ * This class inherided from [[Action]]
+ **/
+'use strict';
+
+var util = require('util');
+
+var Action = require('../action');
+
+// Constants
+var c  = require('../const');
+
+/*:nodoc:*
+ * new ActionHelp(options)
+ * - options (object): options hash see [[Action.new]]
+ *
+ **/
+var ActionHelp = module.exports = function ActionHelp(options) {
+  options = options || {};
+  if (options.defaultValue !== null) {
+    options.defaultValue = options.defaultValue;
+  } else {
+    options.defaultValue = c.SUPPRESS;
+  }
+  options.dest = (options.dest !== null ? options.dest : c.SUPPRESS);
+  options.nargs = 0;
+  Action.call(this, options);
+
+};
+util.inherits(ActionHelp, Action);
+
+/*:nodoc:*
+ * ActionHelp#call(parser, namespace, values, optionString)
+ * - parser (ArgumentParser): current parser
+ * - namespace (Namespace): namespace for output data
+ * - values (Array): parsed values
+ * - optionString (Array): input option string(not parsed)
+ *
+ * Print help and exit
+ **/
+ActionHelp.prototype.call = function (parser) {
+  parser.printHelp();
+  parser.exit();
+};
diff --git a/tools/doc/node_modules/argparse/lib/action/store.js b/tools/doc/node_modules/argparse/lib/action/store.js
new file mode 100644
index 00000000000000..283b8609217561
--- /dev/null
+++ b/tools/doc/node_modules/argparse/lib/action/store.js
@@ -0,0 +1,50 @@
+/*:nodoc:*
+ * class ActionStore
+ *
+ * This action just stores the argument’s value. This is the default action.
+ *
+ * This class inherited from [[Action]]
+ *
+ **/
+'use strict';
+
+var util = require('util');
+
+var Action = require('../action');
+
+// Constants
+var c = require('../const');
+
+
+/*:nodoc:*
+ * new ActionStore(options)
+ * - options (object): options hash see [[Action.new]]
+ *
+ **/
+var ActionStore = module.exports = function ActionStore(options) {
+  options = options || {};
+  if (this.nargs <= 0) {
+    throw new Error('nargs for store actions must be > 0; if you ' +
+        'have nothing to store, actions such as store ' +
+        'true or store const may be more appropriate');
+
+  }
+  if (typeof this.constant !== 'undefined' && this.nargs !== c.OPTIONAL) {
+    throw new Error('nargs must be OPTIONAL to supply const');
+  }
+  Action.call(this, options);
+};
+util.inherits(ActionStore, Action);
+
+/*:nodoc:*
+ * ActionStore#call(parser, namespace, values, optionString) -> Void
+ * - parser (ArgumentParser): current parser
+ * - namespace (Namespace): namespace for output data
+ * - values (Array): parsed values
+ * - optionString (Array): input option string(not parsed)
+ *
+ * Call the action. Save result in namespace object
+ **/
+ActionStore.prototype.call = function (parser, namespace, values) {
+  namespace.set(this.dest, values);
+};
diff --git a/tools/doc/node_modules/argparse/lib/action/store/constant.js b/tools/doc/node_modules/argparse/lib/action/store/constant.js
new file mode 100644
index 00000000000000..23caa897b375d4
--- /dev/null
+++ b/tools/doc/node_modules/argparse/lib/action/store/constant.js
@@ -0,0 +1,43 @@
+/*:nodoc:*
+ * class ActionStoreConstant
+ *
+ * This action stores the value specified by the const keyword argument.
+ * (Note that the const keyword argument defaults to the rather unhelpful null.)
+ * The 'store_const' action is most commonly used with optional
+ * arguments that specify some sort of flag.
+ *
+ * This class inherited from [[Action]]
+ **/
+'use strict';
+
+var util = require('util');
+
+var Action = require('../../action');
+
+/*:nodoc:*
+ * new ActionStoreConstant(options)
+ * - options (object): options hash see [[Action.new]]
+ *
+ **/
+var ActionStoreConstant = module.exports = function ActionStoreConstant(options) {
+  options = options || {};
+  options.nargs = 0;
+  if (typeof options.constant === 'undefined') {
+    throw new Error('constant option is required for storeAction');
+  }
+  Action.call(this, options);
+};
+util.inherits(ActionStoreConstant, Action);
+
+/*:nodoc:*
+ * ActionStoreConstant#call(parser, namespace, values, optionString) -> Void
+ * - parser (ArgumentParser): current parser
+ * - namespace (Namespace): namespace for output data
+ * - values (Array): parsed values
+ * - optionString (Array): input option string(not parsed)
+ *
+ * Call the action. Save result in namespace object
+ **/
+ActionStoreConstant.prototype.call = function (parser, namespace) {
+  namespace.set(this.dest, this.constant);
+};
diff --git a/tools/doc/node_modules/argparse/lib/action/store/false.js b/tools/doc/node_modules/argparse/lib/action/store/false.js
new file mode 100644
index 00000000000000..9924f461dadfe6
--- /dev/null
+++ b/tools/doc/node_modules/argparse/lib/action/store/false.js
@@ -0,0 +1,27 @@
+/*:nodoc:*
+ * class ActionStoreFalse
+ *
+ * This action store the values False respectively.
+ * This is special cases of 'storeConst'
+ *
+ * This class inherited from [[Action]]
+ **/
+
+'use strict';
+
+var util = require('util');
+
+var ActionStoreConstant = require('./constant');
+
+/*:nodoc:*
+ * new ActionStoreFalse(options)
+ * - options (object): hash of options see [[Action.new]]
+ *
+ **/
+var ActionStoreFalse = module.exports = function ActionStoreFalse(options) {
+  options = options || {};
+  options.constant = false;
+  options.defaultValue = options.defaultValue !== null ? options.defaultValue : true;
+  ActionStoreConstant.call(this, options);
+};
+util.inherits(ActionStoreFalse, ActionStoreConstant);
diff --git a/tools/doc/node_modules/argparse/lib/action/store/true.js b/tools/doc/node_modules/argparse/lib/action/store/true.js
new file mode 100644
index 00000000000000..9e22f7d4419eea
--- /dev/null
+++ b/tools/doc/node_modules/argparse/lib/action/store/true.js
@@ -0,0 +1,26 @@
+/*:nodoc:*
+ * class ActionStoreTrue
+ *
+ * This action store the values True respectively.
+ * This isspecial cases of 'storeConst'
+ *
+ * This class inherited from [[Action]]
+ **/
+'use strict';
+
+var util = require('util');
+
+var ActionStoreConstant = require('./constant');
+
+/*:nodoc:*
+ * new ActionStoreTrue(options)
+ * - options (object): options hash see [[Action.new]]
+ *
+ **/
+var ActionStoreTrue = module.exports = function ActionStoreTrue(options) {
+  options = options || {};
+  options.constant = true;
+  options.defaultValue = options.defaultValue !== null ? options.defaultValue : false;
+  ActionStoreConstant.call(this, options);
+};
+util.inherits(ActionStoreTrue, ActionStoreConstant);
diff --git a/tools/doc/node_modules/argparse/lib/action/subparsers.js b/tools/doc/node_modules/argparse/lib/action/subparsers.js
new file mode 100644
index 00000000000000..99dfedd0f1aa02
--- /dev/null
+++ b/tools/doc/node_modules/argparse/lib/action/subparsers.js
@@ -0,0 +1,149 @@
+/** internal
+ * class ActionSubparsers
+ *
+ * Support the creation of such sub-commands with the addSubparsers()
+ *
+ * This class inherited from [[Action]]
+ **/
+'use strict';
+
+var util    = require('util');
+var format  = require('util').format;
+
+
+var Action = require('../action');
+
+// Constants
+var c = require('../const');
+
+// Errors
+var argumentErrorHelper = require('../argument/error');
+
+
+/*:nodoc:*
+ * new ChoicesPseudoAction(name, help)
+ *
+ * Create pseudo action for correct help text
+ *
+ **/
+function ChoicesPseudoAction(name, help) {
+  var options = {
+    optionStrings: [],
+    dest: name,
+    help: help
+  };
+
+  Action.call(this, options);
+}
+
+util.inherits(ChoicesPseudoAction, Action);
+
+/**
+ * new ActionSubparsers(options)
+ * - options (object): options hash see [[Action.new]]
+ *
+ **/
+function ActionSubparsers(options) {
+  options = options || {};
+  options.dest = options.dest || c.SUPPRESS;
+  options.nargs = c.PARSER;
+
+  this.debug = (options.debug === true);
+
+  this._progPrefix = options.prog;
+  this._parserClass = options.parserClass;
+  this._nameParserMap = {};
+  this._choicesActions = [];
+
+  options.choices = this._nameParserMap;
+  Action.call(this, options);
+}
+
+util.inherits(ActionSubparsers, Action);
+
+/*:nodoc:*
+ * ActionSubparsers#addParser(name, options) -> ArgumentParser
+ * - name (string): sub-command name
+ * - options (object): see [[ArgumentParser.new]]
+ *
+ *  Note:
+ *  addParser supports an additional aliases option,
+ *  which allows multiple strings to refer to the same subparser.
+ *  This example, like svn, aliases co as a shorthand for checkout
+ *
+ **/
+ActionSubparsers.prototype.addParser = function (name, options) {
+  var parser;
+
+  var self = this;
+
+  options = options || {};
+
+  options.debug = (this.debug === true);
+
+  // set program from the existing prefix
+  if (!options.prog) {
+    options.prog = this._progPrefix + ' ' + name;
+  }
+
+  var aliases = options.aliases || [];
+
+  // create a pseudo-action to hold the choice help
+  if (!!options.help || typeof options.help === 'string') {
+    var help = options.help;
+    delete options.help;
+
+    var choiceAction = new ChoicesPseudoAction(name, help);
+    this._choicesActions.push(choiceAction);
+  }
+
+  // create the parser and add it to the map
+  parser = new this._parserClass(options);
+  this._nameParserMap[name] = parser;
+
+  // make parser available under aliases also
+  aliases.forEach(function (alias) {
+    self._nameParserMap[alias] = parser;
+  });
+
+  return parser;
+};
+
+ActionSubparsers.prototype._getSubactions = function () {
+  return this._choicesActions;
+};
+
+/*:nodoc:*
+ * ActionSubparsers#call(parser, namespace, values, optionString) -> Void
+ * - parser (ArgumentParser): current parser
+ * - namespace (Namespace): namespace for output data
+ * - values (Array): parsed values
+ * - optionString (Array): input option string(not parsed)
+ *
+ * Call the action. Parse input aguments
+ **/
+ActionSubparsers.prototype.call = function (parser, namespace, values) {
+  var parserName = values[0];
+  var argStrings = values.slice(1);
+
+  // set the parser name if requested
+  if (this.dest !== c.SUPPRESS) {
+    namespace[this.dest] = parserName;
+  }
+
+  // select the parser
+  if (this._nameParserMap[parserName]) {
+    parser = this._nameParserMap[parserName];
+  } else {
+    throw argumentErrorHelper(format(
+      'Unknown parser "%s" (choices: [%s]).',
+        parserName,
+        Object.keys(this._nameParserMap).join(', ')
+    ));
+  }
+
+  // parse all the remaining options into the namespace
+  parser.parseArgs(argStrings, namespace);
+};
+
+module.exports = ActionSubparsers;
diff --git a/tools/doc/node_modules/argparse/lib/action/version.js b/tools/doc/node_modules/argparse/lib/action/version.js
new file mode 100644
index 00000000000000..8053328cdef446
--- /dev/null
+++ b/tools/doc/node_modules/argparse/lib/action/version.js
@@ -0,0 +1,47 @@
+/*:nodoc:*
+ * class ActionVersion
+ *
+ * Support action for printing program version
+ * This class inherited from [[Action]]
+ **/
+'use strict';
+
+var util = require('util');
+
+var Action = require('../action');
+
+//
+// Constants
+//
+var c = require('../const');
+
+/*:nodoc:*
+ * new ActionVersion(options)
+ * - options (object): options hash see [[Action.new]]
+ *
+ **/
+var ActionVersion = module.exports = function ActionVersion(options) {
+  options = options || {};
+  options.defaultValue = (options.defaultValue ? options.defaultValue : c.SUPPRESS);
+  options.dest = (options.dest || c.SUPPRESS);
+  options.nargs = 0;
+  this.version = options.version;
+  Action.call(this, options);
+};
+util.inherits(ActionVersion, Action);
+
+/*:nodoc:*
+ * ActionVersion#call(parser, namespace, values, optionString) -> Void
+ * - parser (ArgumentParser): current parser
+ * - namespace (Namespace): namespace for output data
+ * - values (Array): parsed values
+ * - optionString (Array): input option string(not parsed)
+ *
+ * Print version and exit
+ **/
+ActionVersion.prototype.call = function (parser) {
+  var version = this.version || parser.version;
+  var formatter = parser._getFormatter();
+  formatter.addText(version);
+  parser.exit(0, formatter.formatHelp());
+};
diff --git a/tools/doc/node_modules/argparse/lib/action_container.js b/tools/doc/node_modules/argparse/lib/action_container.js
new file mode 100644
index 00000000000000..86aa017ae6d59c
--- /dev/null
+++ b/tools/doc/node_modules/argparse/lib/action_container.js
@@ -0,0 +1,482 @@
+/** internal
+ * class ActionContainer
+ *
+ * Action container. Parent for [[ArgumentParser]] and [[ArgumentGroup]]
+ **/
+
+'use strict';
+
+var format = require('util').format;
+
+// Constants
+var c = require('./const');
+
+var $$ = require('./utils');
+
+//Actions
+var ActionHelp = require('./action/help');
+var ActionAppend = require('./action/append');
+var ActionAppendConstant = require('./action/append/constant');
+var ActionCount = require('./action/count');
+var ActionStore = require('./action/store');
+var ActionStoreConstant = require('./action/store/constant');
+var ActionStoreTrue = require('./action/store/true');
+var ActionStoreFalse = require('./action/store/false');
+var ActionVersion = require('./action/version');
+var ActionSubparsers = require('./action/subparsers');
+
+// Errors
+var argumentErrorHelper = require('./argument/error');
+
+/**
+ * new ActionContainer(options)
+ *
+ * Action container. Parent for [[ArgumentParser]] and [[ArgumentGroup]]
+ *
+ * ##### Options:
+ *
+ * - `description` -- A description of what the program does
+ * - `prefixChars`  -- Characters that prefix optional arguments
+ * - `argumentDefault`  -- The default value for all arguments
+ * - `conflictHandler` -- The conflict handler to use for duplicate arguments
+ **/
+var ActionContainer = module.exports = function ActionContainer(options) {
+  options = options || {};
+
+  this.description = options.description;
+  this.argumentDefault = options.argumentDefault;
+  this.prefixChars = options.prefixChars || '';
+  this.conflictHandler = options.conflictHandler;
+
+  // set up registries
+  this._registries = {};
+
+  // register actions
+  this.register('action', null, ActionStore);
+  this.register('action', 'store', ActionStore);
+  this.register('action', 'storeConst', ActionStoreConstant);
+  this.register('action', 'storeTrue', ActionStoreTrue);
+  this.register('action', 'storeFalse', ActionStoreFalse);
+  this.register('action', 'append', ActionAppend);
+  this.register('action', 'appendConst', ActionAppendConstant);
+  this.register('action', 'count', ActionCount);
+  this.register('action', 'help', ActionHelp);
+  this.register('action', 'version', ActionVersion);
+  this.register('action', 'parsers', ActionSubparsers);
+
+  // raise an exception if the conflict handler is invalid
+  this._getHandler();
+
+  // action storage
+  this._actions = [];
+  this._optionStringActions = {};
+
+  // groups
+  this._actionGroups = [];
+  this._mutuallyExclusiveGroups = [];
+
+  // defaults storage
+  this._defaults = {};
+
+  // determines whether an "option" looks like a negative number
+  // -1, -1.5 -5e+4
+  this._regexpNegativeNumber = new RegExp('^[-]?[0-9]*\\.?[0-9]+([eE][-+]?[0-9]+)?$');
+
+  // whether or not there are any optionals that look like negative
+  // numbers -- uses a list so it can be shared and edited
+  this._hasNegativeNumberOptionals = [];
+};
+
+// Groups must be required, then ActionContainer already defined
+var ArgumentGroup = require('./argument/group');
+var MutuallyExclusiveGroup = require('./argument/exclusive');
+
+//
+// Registration methods
+//
+
+/**
+ * ActionContainer#register(registryName, value, object) -> Void
+ * - registryName (String) : object type action|type
+ * - value (string) : keyword
+ * - object (Object|Function) : handler
+ *
+ *  Register handlers
+ **/
+ActionContainer.prototype.register = function (registryName, value, object) {
+  this._registries[registryName] = this._registries[registryName] || {};
+  this._registries[registryName][value] = object;
+};
+
+ActionContainer.prototype._registryGet = function (registryName, value, defaultValue) {
+  if (arguments.length < 3) {
+    defaultValue = null;
+  }
+  return this._registries[registryName][value] || defaultValue;
+};
+
+//
+// Namespace default accessor methods
+//
+
+/**
+ * ActionContainer#setDefaults(options) -> Void
+ * - options (object):hash of options see [[Action.new]]
+ *
+ * Set defaults
+ **/
+ActionContainer.prototype.setDefaults = function (options) {
+  options = options || {};
+  for (var property in options) {
+    if ($$.has(options, property)) {
+      this._defaults[property] = options[property];
+    }
+  }
+
+  // if these defaults match any existing arguments, replace the previous
+  // default on the object with the new one
+  this._actions.forEach(function (action) {
+    if ($$.has(options, action.dest)) {
+      action.defaultValue = options[action.dest];
+    }
+  });
+};
+
+/**
+ * ActionContainer#getDefault(dest) -> Mixed
+ * - dest (string): action destination
+ *
+ * Return action default value
+ **/
+ActionContainer.prototype.getDefault = function (dest) {
+  var result = $$.has(this._defaults, dest) ? this._defaults[dest] : null;
+
+  this._actions.forEach(function (action) {
+    if (action.dest === dest && $$.has(action, 'defaultValue')) {
+      result = action.defaultValue;
+    }
+  });
+
+  return result;
+};
+//
+// Adding argument actions
+//
+
+/**
+ * ActionContainer#addArgument(args, options) -> Object
+ * - args (String|Array): argument key, or array of argument keys
+ * - options (Object): action objects see [[Action.new]]
+ *
+ * #### Examples
+ * - addArgument([ '-f', '--foo' ], { action: 'store', defaultValue: 1, ... })
+ * - addArgument([ 'bar' ], { action: 'store', nargs: 1, ... })
+ * - addArgument('--baz', { action: 'store', nargs: 1, ... })
+ **/
+ActionContainer.prototype.addArgument = function (args, options) {
+  args = args;
+  options = options || {};
+
+  if (typeof args === 'string') {
+    args = [ args ];
+  }
+  if (!Array.isArray(args)) {
+    throw new TypeError('addArgument first argument should be a string or an array');
+  }
+  if (typeof options !== 'object' || Array.isArray(options)) {
+    throw new TypeError('addArgument second argument should be a hash');
+  }
+
+  // if no positional args are supplied or only one is supplied and
+  // it doesn't look like an option string, parse a positional argument
+  if (!args || args.length === 1 && this.prefixChars.indexOf(args[0][0]) < 0) {
+    if (args && !!options.dest) {
+      throw new Error('dest supplied twice for positional argument');
+    }
+    options = this._getPositional(args, options);
+
+    // otherwise, we're adding an optional argument
+  } else {
+    options = this._getOptional(args, options);
+  }
+
+  // if no default was supplied, use the parser-level default
+  if (typeof options.defaultValue === 'undefined') {
+    var dest = options.dest;
+    if ($$.has(this._defaults, dest)) {
+      options.defaultValue = this._defaults[dest];
+    } else if (typeof this.argumentDefault !== 'undefined') {
+      options.defaultValue = this.argumentDefault;
+    }
+  }
+
+  // create the action object, and add it to the parser
+  var ActionClass = this._popActionClass(options);
+  if (typeof ActionClass !== 'function') {
+    throw new Error(format('Unknown action "%s".', ActionClass));
+  }
+  var action = new ActionClass(options);
+
+  // throw an error if the action type is not callable
+  var typeFunction = this._registryGet('type', action.type, action.type);
+  if (typeof typeFunction !== 'function') {
+    throw new Error(format('"%s" is not callable', typeFunction));
+  }
+
+  return this._addAction(action);
+};
+
+/**
+ * ActionContainer#addArgumentGroup(options) -> ArgumentGroup
+ * - options (Object): hash of options see [[ArgumentGroup.new]]
+ *
+ * Create new arguments groups
+ **/
+ActionContainer.prototype.addArgumentGroup = function (options) {
+  var group = new ArgumentGroup(this, options);
+  this._actionGroups.push(group);
+  return group;
+};
+
+/**
+ * ActionContainer#addMutuallyExclusiveGroup(options) -> ArgumentGroup
+ * - options (Object): {required: false}
+ *
+ * Create new mutual exclusive groups
+ **/
+ActionContainer.prototype.addMutuallyExclusiveGroup = function (options) {
+  var group = new MutuallyExclusiveGroup(this, options);
+  this._mutuallyExclusiveGroups.push(group);
+  return group;
+};
+
+ActionContainer.prototype._addAction = function (action) {
+  var self = this;
+
+  // resolve any conflicts
+  this._checkConflict(action);
+
+  // add to actions list
+  this._actions.push(action);
+  action.container = this;
+
+  // index the action by any option strings it has
+  action.optionStrings.forEach(function (optionString) {
+    self._optionStringActions[optionString] = action;
+  });
+
+  // set the flag if any option strings look like negative numbers
+  action.optionStrings.forEach(function (optionString) {
+    if (optionString.match(self._regexpNegativeNumber)) {
+      if (!self._hasNegativeNumberOptionals.some(Boolean)) {
+        self._hasNegativeNumberOptionals.push(true);
+      }
+    }
+  });
+
+  // return the created action
+  return action;
+};
+
+ActionContainer.prototype._removeAction = function (action) {
+  var actionIndex = this._actions.indexOf(action);
+  if (actionIndex >= 0) {
+    this._actions.splice(actionIndex, 1);
+  }
+};
+
+ActionContainer.prototype._addContainerActions = function (container) {
+  // collect groups by titles
+  var titleGroupMap = {};
+  this._actionGroups.forEach(function (group) {
+    if (titleGroupMap[group.title]) {
+      throw new Error(format('Cannot merge actions - two groups are named "%s".', group.title));
+    }
+    titleGroupMap[group.title] = group;
+  });
+
+  // map each action to its group
+  var groupMap = {};
+  function actionHash(action) {
+    // unique (hopefully?) string suitable as dictionary key
+    return action.getName();
+  }
+  container._actionGroups.forEach(function (group) {
+    // if a group with the title exists, use that, otherwise
+    // create a new group matching the container's group
+    if (!titleGroupMap[group.title]) {
+      titleGroupMap[group.title] = this.addArgumentGroup({
+        title: group.title,
+        description: group.description
+      });
+    }
+
+    // map the actions to their new group
+    group._groupActions.forEach(function (action) {
+      groupMap[actionHash(action)] = titleGroupMap[group.title];
+    });
+  }, this);
+
+  // add container's mutually exclusive groups
+  // NOTE: if add_mutually_exclusive_group ever gains title= and
+  // description= then this code will need to be expanded as above
+  var mutexGroup;
+  container._mutuallyExclusiveGroups.forEach(function (group) {
+    mutexGroup = this.addMutuallyExclusiveGroup({
+        required: group.required
+      });
+    // map the actions to their new mutex group
+    group._groupActions.forEach(function (action) {
+      groupMap[actionHash(action)] = mutexGroup;
+    });
+  }, this);  // forEach takes a 'this' argument
+
+  // add all actions to this container or their group
+  container._actions.forEach(function (action) {
+    var key = actionHash(action);
+    if (groupMap[key]) {
+      groupMap[key]._addAction(action);
+    } else {
+      this._addAction(action);
+    }
+  });
+};
+
+ActionContainer.prototype._getPositional = function (dest, options) {
+  if (Array.isArray(dest)) {
+    dest = dest[0];
+  }
+  // make sure required is not specified
+  if (options.required) {
+    throw new Error('"required" is an invalid argument for positionals.');
+  }
+
+  // mark positional arguments as required if at least one is
+  // always required
+  if (options.nargs !== c.OPTIONAL && options.nargs !== c.ZERO_OR_MORE) {
+    options.required = true;
+  }
+  if (options.nargs === c.ZERO_OR_MORE && typeof options.defaultValue === 'undefined') {
+    options.required = true;
+  }
+
+  // return the keyword arguments with no option strings
+  options.dest = dest;
+  options.optionStrings = [];
+  return options;
+};
+
+ActionContainer.prototype._getOptional = function (args, options) {
+  var prefixChars = this.prefixChars;
+  var optionStrings = [];
+  var optionStringsLong = [];
+
+  // determine short and long option strings
+  args.forEach(function (optionString) {
+    // error on strings that don't start with an appropriate prefix
+    if (prefixChars.indexOf(optionString[0]) < 0) {
+      throw new Error(format('Invalid option string "%s": must start with a "%s".',
+        optionString,
+        prefixChars
+      ));
+    }
+
+    // strings starting with two prefix characters are long options
+    optionStrings.push(optionString);
+    if (optionString.length > 1 && prefixChars.indexOf(optionString[1]) >= 0) {
+      optionStringsLong.push(optionString);
+    }
+  });
+
+  // infer dest, '--foo-bar' -> 'foo_bar' and '-x' -> 'x'
+  var dest = options.dest || null;
+  delete options.dest;
+
+  if (!dest) {
+    var optionStringDest = optionStringsLong.length ? optionStringsLong[0] : optionStrings[0];
+    dest = $$.trimChars(optionStringDest, this.prefixChars);
+
+    if (dest.length === 0) {
+      throw new Error(
+        format('dest= is required for options like "%s"', optionStrings.join(', '))
+      );
+    }
+    dest = dest.replace(/-/g, '_');
+  }
+
+  // return the updated keyword arguments
+  options.dest = dest;
+  options.optionStrings = optionStrings;
+
+  return options;
+};
+
+ActionContainer.prototype._popActionClass = function (options, defaultValue) {
+  defaultValue = defaultValue || null;
+
+  var action = (options.action || defaultValue);
+  delete options.action;
+
+  var actionClass = this._registryGet('action', action, action);
+  return actionClass;
+};
+
+ActionContainer.prototype._getHandler = function () {
+  var handlerString = this.conflictHandler;
+  var handlerFuncName = '_handleConflict' + $$.capitalize(handlerString);
+  var func = this[handlerFuncName];
+  if (typeof func === 'undefined') {
+    var msg = 'invalid conflict resolution value: ' + handlerString;
+    throw new Error(msg);
+  } else {
+    return func;
+  }
+};
+
+ActionContainer.prototype._checkConflict = function (action) {
+  var optionStringActions = this._optionStringActions;
+  var conflictOptionals = [];
+
+  // find all options that conflict with this option
+  // collect pairs, the string, and an existing action that it conflicts with
+  action.optionStrings.forEach(function (optionString) {
+    var conflOptional = optionStringActions[optionString];
+    if (typeof conflOptional !== 'undefined') {
+      conflictOptionals.push([ optionString, conflOptional ]);
+    }
+  });
+
+  if (conflictOptionals.length > 0) {
+    var conflictHandler = this._getHandler();
+    conflictHandler.call(this, action, conflictOptionals);
+  }
+};
+
+ActionContainer.prototype._handleConflictError = function (action, conflOptionals) {
+  var conflicts = conflOptionals.map(function (pair) { return pair[0]; });
+  conflicts = conflicts.join(', ');
+  throw argumentErrorHelper(
+    action,
+    format('Conflicting option string(s): %s', conflicts)
+  );
+};
+
+ActionContainer.prototype._handleConflictResolve = function (action, conflOptionals) {
+  // remove all conflicting options
+  var self = this;
+  conflOptionals.forEach(function (pair) {
+    var optionString = pair[0];
+    var conflictingAction = pair[1];
+    // remove the conflicting option string
+    var i = conflictingAction.optionStrings.indexOf(optionString);
+    if (i >= 0) {
+      conflictingAction.optionStrings.splice(i, 1);
+    }
+    delete self._optionStringActions[optionString];
+    // if the option now has no option string, remove it from the
+    // container holding it
+    if (conflictingAction.optionStrings.length === 0) {
+      conflictingAction.container._removeAction(conflictingAction);
+    }
+  });
+};
diff --git a/tools/doc/node_modules/argparse/lib/argparse.js b/tools/doc/node_modules/argparse/lib/argparse.js
new file mode 100644
index 00000000000000..f2a2c51d9a8917
--- /dev/null
+++ b/tools/doc/node_modules/argparse/lib/argparse.js
@@ -0,0 +1,14 @@
+'use strict';
+
+module.exports.ArgumentParser = require('./argument_parser.js');
+module.exports.Namespace = require('./namespace');
+module.exports.Action = require('./action');
+module.exports.HelpFormatter = require('./help/formatter.js');
+module.exports.Const = require('./const.js');
+
+module.exports.ArgumentDefaultsHelpFormatter =
+  require('./help/added_formatters.js').ArgumentDefaultsHelpFormatter;
+module.exports.RawDescriptionHelpFormatter =
+  require('./help/added_formatters.js').RawDescriptionHelpFormatter;
+module.exports.RawTextHelpFormatter =
+  require('./help/added_formatters.js').RawTextHelpFormatter;
diff --git a/tools/doc/node_modules/argparse/lib/argument/error.js b/tools/doc/node_modules/argparse/lib/argument/error.js
new file mode 100644
index 00000000000000..c8a02a08b8fbaf
--- /dev/null
+++ b/tools/doc/node_modules/argparse/lib/argument/error.js
@@ -0,0 +1,50 @@
+'use strict';
+
+
+var format  = require('util').format;
+
+
+var ERR_CODE = 'ARGError';
+
+/*:nodoc:*
+ * argumentError(argument, message) -> TypeError
+ * - argument (Object): action with broken argument
+ * - message (String): error message
+ *
+ * Error format helper. An error from creating or using an argument
+ * (optional or positional). The string value of this exception
+ * is the message, augmented with information
+ * about the argument that caused it.
+ *
+ * #####Example
+ *
+ *      var argumentErrorHelper = require('./argument/error');
+ *      if (conflictOptionals.length > 0) {
+ *        throw argumentErrorHelper(
+ *          action,
+ *          format('Conflicting option string(s): %s', conflictOptionals.join(', '))
+ *        );
+ *      }
+ *
+ **/
+module.exports = function (argument, message) {
+  var argumentName = null;
+  var errMessage;
+  var err;
+
+  if (argument.getName) {
+    argumentName = argument.getName();
+  } else {
+    argumentName = '' + argument;
+  }
+
+  if (!argumentName) {
+    errMessage = message;
+  } else {
+    errMessage = format('argument "%s": %s', argumentName, message);
+  }
+
+  err = new TypeError(errMessage);
+  err.code = ERR_CODE;
+  return err;
+};
diff --git a/tools/doc/node_modules/argparse/lib/argument/exclusive.js b/tools/doc/node_modules/argparse/lib/argument/exclusive.js
new file mode 100644
index 00000000000000..8287e00d0464f3
--- /dev/null
+++ b/tools/doc/node_modules/argparse/lib/argument/exclusive.js
@@ -0,0 +1,54 @@
+/** internal
+ * class MutuallyExclusiveGroup
+ *
+ * Group arguments.
+ * By default, ArgumentParser groups command-line arguments
+ * into “positional arguments” and “optional arguments”
+ * when displaying help messages. When there is a better
+ * conceptual grouping of arguments than this default one,
+ * appropriate groups can be created using the addArgumentGroup() method
+ *
+ * This class inherited from [[ArgumentContainer]]
+ **/
+'use strict';
+
+var util = require('util');
+
+var ArgumentGroup = require('./group');
+
+/**
+ * new MutuallyExclusiveGroup(container, options)
+ * - container (object): main container
+ * - options (object): options.required -> true/false
+ *
+ * `required` could be an argument itself, but making it a property of
+ * the options argument is more consistent with the JS adaptation of the Python)
+ **/
+var MutuallyExclusiveGroup = module.exports = function MutuallyExclusiveGroup(container, options) {
+  var required;
+  options = options || {};
+  required = options.required || false;
+  ArgumentGroup.call(this, container);
+  this.required = required;
+
+};
+util.inherits(MutuallyExclusiveGroup, ArgumentGroup);
+
+
+MutuallyExclusiveGroup.prototype._addAction = function (action) {
+  var msg;
+  if (action.required) {
+    msg = 'mutually exclusive arguments must be optional';
+    throw new Error(msg);
+  }
+  action = this._container._addAction(action);
+  this._groupActions.push(action);
+  return action;
+};
+
+
+MutuallyExclusiveGroup.prototype._removeAction = function (action) {
+  this._container._removeAction(action);
+  this._groupActions.remove(action);
+};
+
diff --git a/tools/doc/node_modules/argparse/lib/argument/group.js b/tools/doc/node_modules/argparse/lib/argument/group.js
new file mode 100644
index 00000000000000..58b271f2fec8d0
--- /dev/null
+++ b/tools/doc/node_modules/argparse/lib/argument/group.js
@@ -0,0 +1,75 @@
+/** internal
+ * class ArgumentGroup
+ *
+ * Group arguments.
+ * By default, ArgumentParser groups command-line arguments
+ * into “positional arguments” and “optional arguments”
+ * when displaying help messages. When there is a better
+ * conceptual grouping of arguments than this default one,
+ * appropriate groups can be created using the addArgumentGroup() method
+ *
+ * This class inherited from [[ArgumentContainer]]
+ **/
+'use strict';
+
+var util = require('util');
+
+var ActionContainer = require('../action_container');
+
+
+/**
+ * new ArgumentGroup(container, options)
+ * - container (object): main container
+ * - options (object): hash of group options
+ *
+ * #### options
+ * - **prefixChars**  group name prefix
+ * - **argumentDefault**  default argument value
+ * - **title**  group title
+ * - **description** group description
+ *
+ **/
+var ArgumentGroup = module.exports = function ArgumentGroup(container, options) {
+
+  options = options || {};
+
+  // add any missing keyword arguments by checking the container
+  options.conflictHandler = (options.conflictHandler || container.conflictHandler);
+  options.prefixChars = (options.prefixChars || container.prefixChars);
+  options.argumentDefault = (options.argumentDefault || container.argumentDefault);
+
+  ActionContainer.call(this, options);
+
+  // group attributes
+  this.title = options.title;
+  this._groupActions = [];
+
+  // share most attributes with the container
+  this._container = container;
+  this._registries = container._registries;
+  this._actions = container._actions;
+  this._optionStringActions = container._optionStringActions;
+  this._defaults = container._defaults;
+  this._hasNegativeNumberOptionals = container._hasNegativeNumberOptionals;
+  this._mutuallyExclusiveGroups = container._mutuallyExclusiveGroups;
+};
+util.inherits(ArgumentGroup, ActionContainer);
+
+
+ArgumentGroup.prototype._addAction = function (action) {
+  // Parent add action
+  action = ActionContainer.prototype._addAction.call(this, action);
+  this._groupActions.push(action);
+  return action;
+};
+
+
+ArgumentGroup.prototype._removeAction = function (action) {
+  // Parent remove action
+  ActionContainer.prototype._removeAction.call(this, action);
+  var actionIndex = this._groupActions.indexOf(action);
+  if (actionIndex >= 0) {
+    this._groupActions.splice(actionIndex, 1);
+  }
+};
+
diff --git a/tools/doc/node_modules/argparse/lib/argument_parser.js b/tools/doc/node_modules/argparse/lib/argument_parser.js
new file mode 100644
index 00000000000000..eca1ad685edc6c
--- /dev/null
+++ b/tools/doc/node_modules/argparse/lib/argument_parser.js
@@ -0,0 +1,1161 @@
+/**
+ * class ArgumentParser
+ *
+ * Object for parsing command line strings into js objects.
+ *
+ * Inherited from [[ActionContainer]]
+ **/
+'use strict';
+
+var util    = require('util');
+var format  = require('util').format;
+var Path    = require('path');
+var sprintf = require('sprintf-js').sprintf;
+
+// Constants
+var c = require('./const');
+
+var $$ = require('./utils');
+
+var ActionContainer = require('./action_container');
+
+// Errors
+var argumentErrorHelper = require('./argument/error');
+
+var HelpFormatter = require('./help/formatter');
+
+var Namespace = require('./namespace');
+
+
+/**
+ * new ArgumentParser(options)
+ *
+ * Create a new ArgumentParser object.
+ *
+ * ##### Options:
+ * - `prog`  The name of the program (default: Path.basename(process.argv[1]))
+ * - `usage`  A usage message (default: auto-generated from arguments)
+ * - `description`  A description of what the program does
+ * - `epilog`  Text following the argument descriptions
+ * - `parents`  Parsers whose arguments should be copied into this one
+ * - `formatterClass`  HelpFormatter class for printing help messages
+ * - `prefixChars`  Characters that prefix optional arguments
+ * - `fromfilePrefixChars` Characters that prefix files containing additional arguments
+ * - `argumentDefault`  The default value for all arguments
+ * - `addHelp`  Add a -h/-help option
+ * - `conflictHandler`  Specifies how to handle conflicting argument names
+ * - `debug`  Enable debug mode. Argument errors throw exception in
+ *   debug mode and process.exit in normal. Used for development and
+ *   testing (default: false)
+ *
+ * See also [original guide][1]
+ *
+ * [1]:http://docs.python.org/dev/library/argparse.html#argumentparser-objects
+ **/
+function ArgumentParser(options) {
+  if (!(this instanceof ArgumentParser)) {
+    return new ArgumentParser(options);
+  }
+  var self = this;
+  options = options || {};
+
+  options.description = (options.description || null);
+  options.argumentDefault = (options.argumentDefault || null);
+  options.prefixChars = (options.prefixChars || '-');
+  options.conflictHandler = (options.conflictHandler || 'error');
+  ActionContainer.call(this, options);
+
+  options.addHelp = typeof options.addHelp === 'undefined' || !!options.addHelp;
+  options.parents = options.parents || [];
+  // default program name
+  options.prog = (options.prog || Path.basename(process.argv[1]));
+  this.prog = options.prog;
+  this.usage = options.usage;
+  this.epilog = options.epilog;
+  this.version = options.version;
+
+  this.debug = (options.debug === true);
+
+  this.formatterClass = (options.formatterClass || HelpFormatter);
+  this.fromfilePrefixChars = options.fromfilePrefixChars || null;
+  this._positionals = this.addArgumentGroup({ title: 'Positional arguments' });
+  this._optionals = this.addArgumentGroup({ title: 'Optional arguments' });
+  this._subparsers = null;
+
+  // register types
+  function FUNCTION_IDENTITY(o) {
+    return o;
+  }
+  this.register('type', 'auto', FUNCTION_IDENTITY);
+  this.register('type', null, FUNCTION_IDENTITY);
+  this.register('type', 'int', function (x) {
+    var result = parseInt(x, 10);
+    if (isNaN(result)) {
+      throw new Error(x + ' is not a valid integer.');
+    }
+    return result;
+  });
+  this.register('type', 'float', function (x) {
+    var result = parseFloat(x);
+    if (isNaN(result)) {
+      throw new Error(x + ' is not a valid float.');
+    }
+    return result;
+  });
+  this.register('type', 'string', function (x) {
+    return '' + x;
+  });
+
+  // add help and version arguments if necessary
+  var defaultPrefix = (this.prefixChars.indexOf('-') > -1) ? '-' : this.prefixChars[0];
+  if (options.addHelp) {
+    this.addArgument(
+      [ defaultPrefix + 'h', defaultPrefix + defaultPrefix + 'help' ],
+      {
+        action: 'help',
+        defaultValue: c.SUPPRESS,
+        help: 'Show this help message and exit.'
+      }
+    );
+  }
+  if (typeof this.version !== 'undefined') {
+    this.addArgument(
+      [ defaultPrefix + 'v', defaultPrefix + defaultPrefix + 'version' ],
+      {
+        action: 'version',
+        version: this.version,
+        defaultValue: c.SUPPRESS,
+        help: "Show program's version number and exit."
+      }
+    );
+  }
+
+  // add parent arguments and defaults
+  options.parents.forEach(function (parent) {
+    self._addContainerActions(parent);
+    if (typeof parent._defaults !== 'undefined') {
+      for (var defaultKey in parent._defaults) {
+        if (parent._defaults.hasOwnProperty(defaultKey)) {
+          self._defaults[defaultKey] = parent._defaults[defaultKey];
+        }
+      }
+    }
+  });
+}
+
+util.inherits(ArgumentParser, ActionContainer);
+
+/**
+ * ArgumentParser#addSubparsers(options) -> [[ActionSubparsers]]
+ * - options (object): hash of options see [[ActionSubparsers.new]]
+ *
+ * See also [subcommands][1]
+ *
+ * [1]:http://docs.python.org/dev/library/argparse.html#sub-commands
+ **/
+ArgumentParser.prototype.addSubparsers = function (options) {
+  if (this._subparsers) {
+    this.error('Cannot have multiple subparser arguments.');
+  }
+
+  options = options || {};
+  options.debug = (this.debug === true);
+  options.optionStrings = [];
+  options.parserClass = (options.parserClass || ArgumentParser);
+
+
+  if (!!options.title || !!options.description) {
+
+    this._subparsers = this.addArgumentGroup({
+      title: (options.title || 'subcommands'),
+      description: options.description
+    });
+    delete options.title;
+    delete options.description;
+
+  } else {
+    this._subparsers = this._positionals;
+  }
+
+  // prog defaults to the usage message of this parser, skipping
+  // optional arguments and with no "usage:" prefix
+  if (!options.prog) {
+    var formatter = this._getFormatter();
+    var positionals = this._getPositionalActions();
+    var groups = this._mutuallyExclusiveGroups;
+    formatter.addUsage(this.usage, positionals, groups, '');
+    options.prog = formatter.formatHelp().trim();
+  }
+
+  // create the parsers action and add it to the positionals list
+  var ParsersClass = this._popActionClass(options, 'parsers');
+  var action = new ParsersClass(options);
+  this._subparsers._addAction(action);
+
+  // return the created parsers action
+  return action;
+};
+
+ArgumentParser.prototype._addAction = function (action) {
+  if (action.isOptional()) {
+    this._optionals._addAction(action);
+  } else {
+    this._positionals._addAction(action);
+  }
+  return action;
+};
+
+ArgumentParser.prototype._getOptionalActions = function () {
+  return this._actions.filter(function (action) {
+    return action.isOptional();
+  });
+};
+
+ArgumentParser.prototype._getPositionalActions = function () {
+  return this._actions.filter(function (action) {
+    return action.isPositional();
+  });
+};
+
+
+/**
+ * ArgumentParser#parseArgs(args, namespace) -> Namespace|Object
+ * - args (array): input elements
+ * - namespace (Namespace|Object): result object
+ *
+ * Parsed args and throws error if some arguments are not recognized
+ *
+ * See also [original guide][1]
+ *
+ * [1]:http://docs.python.org/dev/library/argparse.html#the-parse-args-method
+ **/
+ArgumentParser.prototype.parseArgs = function (args, namespace) {
+  var argv;
+  var result = this.parseKnownArgs(args, namespace);
+
+  args = result[0];
+  argv = result[1];
+  if (argv && argv.length > 0) {
+    this.error(
+      format('Unrecognized arguments: %s.', argv.join(' '))
+    );
+  }
+  return args;
+};
+
+/**
+ * ArgumentParser#parseKnownArgs(args, namespace) -> array
+ * - args (array): input options
+ * - namespace (Namespace|Object): result object
+ *
+ * Parse known arguments and return tuple of result object
+ * and unknown args
+ *
+ * See also [original guide][1]
+ *
+ * [1]:http://docs.python.org/dev/library/argparse.html#partial-parsing
+ **/
+ArgumentParser.prototype.parseKnownArgs = function (args, namespace) {
+  var self = this;
+
+  // args default to the system args
+  args = args || process.argv.slice(2);
+
+  // default Namespace built from parser defaults
+  namespace = namespace || new Namespace();
+
+  self._actions.forEach(function (action) {
+    if (action.dest !== c.SUPPRESS) {
+      if (!$$.has(namespace, action.dest)) {
+        if (action.defaultValue !== c.SUPPRESS) {
+          var defaultValue = action.defaultValue;
+          if (typeof action.defaultValue === 'string') {
+            defaultValue = self._getValue(action, defaultValue);
+          }
+          namespace[action.dest] = defaultValue;
+        }
+      }
+    }
+  });
+
+  Object.keys(self._defaults).forEach(function (dest) {
+    namespace[dest] = self._defaults[dest];
+  });
+
+  // parse the arguments and exit if there are any errors
+  try {
+    var res = this._parseKnownArgs(args, namespace);
+
+    namespace = res[0];
+    args = res[1];
+    if ($$.has(namespace, c._UNRECOGNIZED_ARGS_ATTR)) {
+      args = $$.arrayUnion(args, namespace[c._UNRECOGNIZED_ARGS_ATTR]);
+      delete namespace[c._UNRECOGNIZED_ARGS_ATTR];
+    }
+    return [ namespace, args ];
+  } catch (e) {
+    this.error(e);
+  }
+};
+
+ArgumentParser.prototype._parseKnownArgs = function (argStrings, namespace) {
+  var self = this;
+
+  var extras = [];
+
+  // replace arg strings that are file references
+  if (this.fromfilePrefixChars !== null) {
+    argStrings = this._readArgsFromFiles(argStrings);
+  }
+  // map all mutually exclusive arguments to the other arguments
+  // they can't occur with
+  // Python has 'conflicts = action_conflicts.setdefault(mutex_action, [])'
+  // though I can't conceive of a way in which an action could be a member
+  // of two different mutually exclusive groups.
+
+  function actionHash(action) {
+    // some sort of hashable key for this action
+    // action itself cannot be a key in actionConflicts
+    // I think getName() (join of optionStrings) is unique enough
+    return action.getName();
+  }
+
+  var conflicts, key;
+  var actionConflicts = {};
+
+  this._mutuallyExclusiveGroups.forEach(function (mutexGroup) {
+    mutexGroup._groupActions.forEach(function (mutexAction, i, groupActions) {
+      key = actionHash(mutexAction);
+      if (!$$.has(actionConflicts, key)) {
+        actionConflicts[key] = [];
+      }
+      conflicts = actionConflicts[key];
+      conflicts.push.apply(conflicts, groupActions.slice(0, i));
+      conflicts.push.apply(conflicts, groupActions.slice(i + 1));
+    });
+  });
+
+  // find all option indices, and determine the arg_string_pattern
+  // which has an 'O' if there is an option at an index,
+  // an 'A' if there is an argument, or a '-' if there is a '--'
+  var optionStringIndices = {};
+
+  var argStringPatternParts = [];
+
+  argStrings.forEach(function (argString, argStringIndex) {
+    if (argString === '--') {
+      argStringPatternParts.push('-');
+      while (argStringIndex < argStrings.length) {
+        argStringPatternParts.push('A');
+        argStringIndex++;
+      }
+    } else {
+      // otherwise, add the arg to the arg strings
+      // and note the index if it was an option
+      var pattern;
+      var optionTuple = self._parseOptional(argString);
+      if (!optionTuple) {
+        pattern = 'A';
+      } else {
+        optionStringIndices[argStringIndex] = optionTuple;
+        pattern = 'O';
+      }
+      argStringPatternParts.push(pattern);
+    }
+  });
+  var argStringsPattern = argStringPatternParts.join('');
+
+  var seenActions = [];
+  var seenNonDefaultActions = [];
+
+
+  function takeAction(action, argumentStrings, optionString) {
+    seenActions.push(action);
+    var argumentValues = self._getValues(action, argumentStrings);
+
+    // error if this argument is not allowed with other previously
+    // seen arguments, assuming that actions that use the default
+    // value don't really count as "present"
+    if (argumentValues !== action.defaultValue) {
+      seenNonDefaultActions.push(action);
+      if (actionConflicts[actionHash(action)]) {
+        actionConflicts[actionHash(action)].forEach(function (actionConflict) {
+          if (seenNonDefaultActions.indexOf(actionConflict) >= 0) {
+            throw argumentErrorHelper(
+              action,
+              format('Not allowed with argument "%s".', actionConflict.getName())
+            );
+          }
+        });
+      }
+    }
+
+    if (argumentValues !== c.SUPPRESS) {
+      action.call(self, namespace, argumentValues, optionString);
+    }
+  }
+
+  function consumeOptional(startIndex) {
+    // get the optional identified at this index
+    var optionTuple = optionStringIndices[startIndex];
+    var action = optionTuple[0];
+    var optionString = optionTuple[1];
+    var explicitArg = optionTuple[2];
+
+    // identify additional optionals in the same arg string
+    // (e.g. -xyz is the same as -x -y -z if no args are required)
+    var actionTuples = [];
+
+    var args, argCount, start, stop;
+
+    for (;;) {
+      if (!action) {
+        extras.push(argStrings[startIndex]);
+        return startIndex + 1;
+      }
+      if (explicitArg) {
+        argCount = self._matchArgument(action, 'A');
+
+        // if the action is a single-dash option and takes no
+        // arguments, try to parse more single-dash options out
+        // of the tail of the option string
+        var chars = self.prefixChars;
+        if (argCount === 0 && chars.indexOf(optionString[1]) < 0) {
+          actionTuples.push([ action, [], optionString ]);
+          optionString = optionString[0] + explicitArg[0];
+          var newExplicitArg = explicitArg.slice(1) || null;
+          var optionalsMap = self._optionStringActions;
+
+          if (Object.keys(optionalsMap).indexOf(optionString) >= 0) {
+            action = optionalsMap[optionString];
+            explicitArg = newExplicitArg;
+          } else {
+            throw argumentErrorHelper(action, sprintf('ignored explicit argument %r', explicitArg));
+          }
+        } else if (argCount === 1) {
+          // if the action expect exactly one argument, we've
+          // successfully matched the option; exit the loop
+          stop = startIndex + 1;
+          args = [ explicitArg ];
+          actionTuples.push([ action, args, optionString ]);
+          break;
+        } else {
+          // error if a double-dash option did not use the
+          // explicit argument
+          throw argumentErrorHelper(action, sprintf('ignored explicit argument %r', explicitArg));
+        }
+      } else {
+        // if there is no explicit argument, try to match the
+        // optional's string arguments with the following strings
+        // if successful, exit the loop
+
+        start = startIndex + 1;
+        var selectedPatterns = argStringsPattern.substr(start);
+
+        argCount = self._matchArgument(action, selectedPatterns);
+        stop = start + argCount;
+
+
+        args = argStrings.slice(start, stop);
+
+        actionTuples.push([ action, args, optionString ]);
+        break;
+      }
+
+    }
+
+    // add the Optional to the list and return the index at which
+    // the Optional's string args stopped
+    if (actionTuples.length < 1) {
+      throw new Error('length should be > 0');
+    }
+    for (var i = 0; i < actionTuples.length; i++) {
+      takeAction.apply(self, actionTuples[i]);
+    }
+    return stop;
+  }
+
+  // the list of Positionals left to be parsed; this is modified
+  // by consume_positionals()
+  var positionals = self._getPositionalActions();
+
+  function consumePositionals(startIndex) {
+    // match as many Positionals as possible
+    var selectedPattern = argStringsPattern.substr(startIndex);
+    var argCounts = self._matchArgumentsPartial(positionals, selectedPattern);
+
+    // slice off the appropriate arg strings for each Positional
+    // and add the Positional and its args to the list
+    for (var i = 0; i < positionals.length; i++) {
+      var action = positionals[i];
+      var argCount = argCounts[i];
+      if (typeof argCount === 'undefined') {
+        continue;
+      }
+      var args = argStrings.slice(startIndex, startIndex + argCount);
+
+      startIndex += argCount;
+      takeAction(action, args);
+    }
+
+    // slice off the Positionals that we just parsed and return the
+    // index at which the Positionals' string args stopped
+    positionals = positionals.slice(argCounts.length);
+    return startIndex;
+  }
+
+  // consume Positionals and Optionals alternately, until we have
+  // passed the last option string
+  var startIndex = 0;
+  var position;
+
+  var maxOptionStringIndex = -1;
+
+  Object.keys(optionStringIndices).forEach(function (position) {
+    maxOptionStringIndex = Math.max(maxOptionStringIndex, parseInt(position, 10));
+  });
+
+  var positionalsEndIndex, nextOptionStringIndex;
+
+  while (startIndex <= maxOptionStringIndex) {
+    // consume any Positionals preceding the next option
+    nextOptionStringIndex = null;
+    for (position in optionStringIndices) {
+      if (!optionStringIndices.hasOwnProperty(position)) { continue; }
+
+      position = parseInt(position, 10);
+      if (position >= startIndex) {
+        if (nextOptionStringIndex !== null) {
+          nextOptionStringIndex = Math.min(nextOptionStringIndex, position);
+        } else {
+          nextOptionStringIndex = position;
+        }
+      }
+    }
+
+    if (startIndex !== nextOptionStringIndex) {
+      positionalsEndIndex = consumePositionals(startIndex);
+      // only try to parse the next optional if we didn't consume
+      // the option string during the positionals parsing
+      if (positionalsEndIndex > startIndex) {
+        startIndex = positionalsEndIndex;
+        continue;
+      } else {
+        startIndex = positionalsEndIndex;
+      }
+    }
+
+    // if we consumed all the positionals we could and we're not
+    // at the index of an option string, there were extra arguments
+    if (!optionStringIndices[startIndex]) {
+      var strings = argStrings.slice(startIndex, nextOptionStringIndex);
+      extras = extras.concat(strings);
+      startIndex = nextOptionStringIndex;
+    }
+    // consume the next optional and any arguments for it
+    startIndex = consumeOptional(startIndex);
+  }
+
+  // consume any positionals following the last Optional
+  var stopIndex = consumePositionals(startIndex);
+
+  // if we didn't consume all the argument strings, there were extras
+  extras = extras.concat(argStrings.slice(stopIndex));
+
+  // if we didn't use all the Positional objects, there were too few
+  // arg strings supplied.
+  if (positionals.length > 0) {
+    self.error('too few arguments');
+  }
+
+  // make sure all required actions were present
+  self._actions.forEach(function (action) {
+    if (action.required) {
+      if (seenActions.indexOf(action) < 0) {
+        self.error(format('Argument "%s" is required', action.getName()));
+      }
+    }
+  });
+
+  // make sure all required groups have one option present
+  var actionUsed = false;
+  self._mutuallyExclusiveGroups.forEach(function (group) {
+    if (group.required) {
+      actionUsed = group._groupActions.some(function (action) {
+        return seenNonDefaultActions.indexOf(action) !== -1;
+      });
+
+      // if no actions were used, report the error
+      if (!actionUsed) {
+        var names = [];
+        group._groupActions.forEach(function (action) {
+          if (action.help !== c.SUPPRESS) {
+            names.push(action.getName());
+          }
+        });
+        names = names.join(' ');
+        var msg = 'one of the arguments ' + names + ' is required';
+        self.error(msg);
+      }
+    }
+  });
+
+  // return the updated namespace and the extra arguments
+  return [ namespace, extras ];
+};
+
+ArgumentParser.prototype._readArgsFromFiles = function (argStrings) {
+  // expand arguments referencing files
+  var self = this;
+  var fs = require('fs');
+  var newArgStrings = [];
+  argStrings.forEach(function (argString) {
+    if (self.fromfilePrefixChars.indexOf(argString[0]) < 0) {
+      // for regular arguments, just add them back into the list
+      newArgStrings.push(argString);
+    } else {
+      // replace arguments referencing files with the file content
+      try {
+        var argstrs = [];
+        var filename = argString.slice(1);
+        var content = fs.readFileSync(filename, 'utf8');
+        content = content.trim().split('\n');
+        content.forEach(function (argLine) {
+          self.convertArgLineToArgs(argLine).forEach(function (arg) {
+            argstrs.push(arg);
+          });
+          argstrs = self._readArgsFromFiles(argstrs);
+        });
+        newArgStrings.push.apply(newArgStrings, argstrs);
+      } catch (error) {
+        return self.error(error.message);
+      }
+    }
+  });
+  return newArgStrings;
+};
+
+ArgumentParser.prototype.convertArgLineToArgs = function (argLine) {
+  return [ argLine ];
+};
+
+ArgumentParser.prototype._matchArgument = function (action, regexpArgStrings) {
+
+  // match the pattern for this action to the arg strings
+  var regexpNargs = new RegExp('^' + this._getNargsPattern(action));
+  var matches = regexpArgStrings.match(regexpNargs);
+  var message;
+
+  // throw an exception if we weren't able to find a match
+  if (!matches) {
+    switch (action.nargs) {
+    /*eslint-disable no-undefined*/
+    case undefined:
+    case null:
+      message = 'Expected one argument.';
+      break;
+    case c.OPTIONAL:
+      message = 'Expected at most one argument.';
+      break;
+    case c.ONE_OR_MORE:
+      message = 'Expected at least one argument.';
+      break;
+    default:
+      message = 'Expected %s argument(s)';
+    }
+
+    throw argumentErrorHelper(
+      action,
+      format(message, action.nargs)
+    );
+  }
+  // return the number of arguments matched
+  return matches[1].length;
+};
+
+ArgumentParser.prototype._matchArgumentsPartial = function (actions, regexpArgStrings) {
+  // progressively shorten the actions list by slicing off the
+  // final actions until we find a match
+  var self = this;
+  var result = [];
+  var actionSlice, pattern, matches;
+  var i, j;
+
+  function getLength(string) {
+    return string.length;
+  }
+
+  for (i = actions.length; i > 0; i--) {
+    pattern = '';
+    actionSlice = actions.slice(0, i);
+    for (j = 0; j < actionSlice.length; j++) {
+      pattern += self._getNargsPattern(actionSlice[j]);
+    }
+
+    pattern = new RegExp('^' + pattern);
+    matches = regexpArgStrings.match(pattern);
+
+    if (matches && matches.length > 0) {
+      // need only groups
+      matches = matches.splice(1);
+      result = result.concat(matches.map(getLength));
+      break;
+    }
+  }
+
+  // return the list of arg string counts
+  return result;
+};
+
+ArgumentParser.prototype._parseOptional = function (argString) {
+  var action, optionString, argExplicit, optionTuples;
+
+  // if it's an empty string, it was meant to be a positional
+  if (!argString) {
+    return null;
+  }
+
+  // if it doesn't start with a prefix, it was meant to be positional
+  if (this.prefixChars.indexOf(argString[0]) < 0) {
+    return null;
+  }
+
+  // if the option string is present in the parser, return the action
+  if (this._optionStringActions[argString]) {
+    return [ this._optionStringActions[argString], argString, null ];
+  }
+
+  // if it's just a single character, it was meant to be positional
+  if (argString.length === 1) {
+    return null;
+  }
+
+  // if the option string before the "=" is present, return the action
+  if (argString.indexOf('=') >= 0) {
+    optionString = argString.split('=', 1)[0];
+    argExplicit = argString.slice(optionString.length + 1);
+
+    if (this._optionStringActions[optionString]) {
+      action = this._optionStringActions[optionString];
+      return [ action, optionString, argExplicit ];
+    }
+  }
+
+  // search through all possible prefixes of the option string
+  // and all actions in the parser for possible interpretations
+  optionTuples = this._getOptionTuples(argString);
+
+  // if multiple actions match, the option string was ambiguous
+  if (optionTuples.length > 1) {
+    var optionStrings = optionTuples.map(function (optionTuple) {
+      return optionTuple[1];
+    });
+    this.error(format(
+          'Ambiguous option: "%s" could match %s.',
+          argString, optionStrings.join(', ')
+    ));
+  // if exactly one action matched, this segmentation is good,
+  // so return the parsed action
+  } else if (optionTuples.length === 1) {
+    return optionTuples[0];
+  }
+
+  // if it was not found as an option, but it looks like a negative
+  // number, it was meant to be positional
+  // unless there are negative-number-like options
+  if (argString.match(this._regexpNegativeNumber)) {
+    if (!this._hasNegativeNumberOptionals.some(Boolean)) {
+      return null;
+    }
+  }
+  // if it contains a space, it was meant to be a positional
+  if (argString.search(' ') >= 0) {
+    return null;
+  }
+
+  // it was meant to be an optional but there is no such option
+  // in this parser (though it might be a valid option in a subparser)
+  return [ null, argString, null ];
+};
+
+ArgumentParser.prototype._getOptionTuples = function (optionString) {
+  var result = [];
+  var chars = this.prefixChars;
+  var optionPrefix;
+  var argExplicit;
+  var action;
+  var actionOptionString;
+
+  // option strings starting with two prefix characters are only split at
+  // the '='
+  if (chars.indexOf(optionString[0]) >= 0 && chars.indexOf(optionString[1]) >= 0) {
+    if (optionString.indexOf('=') >= 0) {
+      var optionStringSplit = optionString.split('=', 1);
+
+      optionPrefix = optionStringSplit[0];
+      argExplicit = optionStringSplit[1];
+    } else {
+      optionPrefix = optionString;
+      argExplicit = null;
+    }
+
+    for (actionOptionString in this._optionStringActions) {
+      if (actionOptionString.substr(0, optionPrefix.length) === optionPrefix) {
+        action = this._optionStringActions[actionOptionString];
+        result.push([ action, actionOptionString, argExplicit ]);
+      }
+    }
+
+  // single character options can be concatenated with their arguments
+  // but multiple character options always have to have their argument
+  // separate
+  } else if (chars.indexOf(optionString[0]) >= 0 && chars.indexOf(optionString[1]) < 0) {
+    optionPrefix = optionString;
+    argExplicit = null;
+    var optionPrefixShort = optionString.substr(0, 2);
+    var argExplicitShort = optionString.substr(2);
+
+    for (actionOptionString in this._optionStringActions) {
+      if (!$$.has(this._optionStringActions, actionOptionString)) continue;
+
+      action = this._optionStringActions[actionOptionString];
+      if (actionOptionString === optionPrefixShort) {
+        result.push([ action, actionOptionString, argExplicitShort ]);
+      } else if (actionOptionString.substr(0, optionPrefix.length) === optionPrefix) {
+        result.push([ action, actionOptionString, argExplicit ]);
+      }
+    }
+
+  // shouldn't ever get here
+  } else {
+    throw new Error(format('Unexpected option string: %s.', optionString));
+  }
+  // return the collected option tuples
+  return result;
+};
+
+ArgumentParser.prototype._getNargsPattern = function (action) {
+  // in all examples below, we have to allow for '--' args
+  // which are represented as '-' in the pattern
+  var regexpNargs;
+
+  switch (action.nargs) {
+  // the default (null) is assumed to be a single argument
+  case undefined:
+  case null:
+    regexpNargs = '(-*A-*)';
+    break;
+  // allow zero or more arguments
+  case c.OPTIONAL:
+    regexpNargs = '(-*A?-*)';
+    break;
+  // allow zero or more arguments
+  case c.ZERO_OR_MORE:
+    regexpNargs = '(-*[A-]*)';
+    break;
+  // allow one or more arguments
+  case c.ONE_OR_MORE:
+    regexpNargs = '(-*A[A-]*)';
+    break;
+  // allow any number of options or arguments
+  case c.REMAINDER:
+    regexpNargs = '([-AO]*)';
+    break;
+  // allow one argument followed by any number of options or arguments
+  case c.PARSER:
+    regexpNargs = '(-*A[-AO]*)';
+    break;
+  // all others should be integers
+  default:
+    regexpNargs = '(-*' + $$.repeat('-*A', action.nargs) + '-*)';
+  }
+
+  // if this is an optional action, -- is not allowed
+  if (action.isOptional()) {
+    regexpNargs = regexpNargs.replace(/-\*/g, '');
+    regexpNargs = regexpNargs.replace(/-/g, '');
+  }
+
+  // return the pattern
+  return regexpNargs;
+};
+
+//
+// Value conversion methods
+//
+
+ArgumentParser.prototype._getValues = function (action, argStrings) {
+  var self = this;
+
+  // for everything but PARSER args, strip out '--'
+  if (action.nargs !== c.PARSER && action.nargs !== c.REMAINDER) {
+    argStrings = argStrings.filter(function (arrayElement) {
+      return arrayElement !== '--';
+    });
+  }
+
+  var value, argString;
+
+  // optional argument produces a default when not present
+  if (argStrings.length === 0 && action.nargs === c.OPTIONAL) {
+
+    value = (action.isOptional()) ? action.constant : action.defaultValue;
+
+    if (typeof (value) === 'string') {
+      value = this._getValue(action, value);
+      this._checkValue(action, value);
+    }
+
+  // when nargs='*' on a positional, if there were no command-line
+  // args, use the default if it is anything other than None
+  } else if (argStrings.length === 0 && action.nargs === c.ZERO_OR_MORE &&
+    action.optionStrings.length === 0) {
+
+    value = (action.defaultValue || argStrings);
+    this._checkValue(action, value);
+
+  // single argument or optional argument produces a single value
+  } else if (argStrings.length === 1 &&
+        (!action.nargs || action.nargs === c.OPTIONAL)) {
+
+    argString = argStrings[0];
+    value = this._getValue(action, argString);
+    this._checkValue(action, value);
+
+  // REMAINDER arguments convert all values, checking none
+  } else if (action.nargs === c.REMAINDER) {
+    value = argStrings.map(function (v) {
+      return self._getValue(action, v);
+    });
+
+  // PARSER arguments convert all values, but check only the first
+  } else if (action.nargs === c.PARSER) {
+    value = argStrings.map(function (v) {
+      return self._getValue(action, v);
+    });
+    this._checkValue(action, value[0]);
+
+  // all other types of nargs produce a list
+  } else {
+    value = argStrings.map(function (v) {
+      return self._getValue(action, v);
+    });
+    value.forEach(function (v) {
+      self._checkValue(action, v);
+    });
+  }
+
+  // return the converted value
+  return value;
+};
+
+ArgumentParser.prototype._getValue = function (action, argString) {
+  var result;
+
+  var typeFunction = this._registryGet('type', action.type, action.type);
+  if (typeof typeFunction !== 'function') {
+    var message = format('%s is not callable', typeFunction);
+    throw argumentErrorHelper(action, message);
+  }
+
+  // convert the value to the appropriate type
+  try {
+    result = typeFunction(argString);
+
+    // ArgumentTypeErrors indicate errors
+    // If action.type is not a registered string, it is a function
+    // Try to deduce its name for inclusion in the error message
+    // Failing that, include the error message it raised.
+  } catch (e) {
+    var name = null;
+    if (typeof action.type === 'string') {
+      name = action.type;
+    } else {
+      name = action.type.name || action.type.displayName || '<function>';
+    }
+    var msg = format('Invalid %s value: %s', name, argString);
+    if (name === '<function>') { msg += '\n' + e.message; }
+    throw argumentErrorHelper(action, msg);
+  }
+  // return the converted value
+  return result;
+};
+
+ArgumentParser.prototype._checkValue = function (action, value) {
+  // converted value must be one of the choices (if specified)
+  var choices = action.choices;
+  if (choices) {
+    // choise for argument can by array or string
+    if ((typeof choices === 'string' || Array.isArray(choices)) &&
+        choices.indexOf(value) !== -1) {
+      return;
+    }
+    // choise for subparsers can by only hash
+    if (typeof choices === 'object' && !Array.isArray(choices) && choices[value]) {
+      return;
+    }
+
+    if (typeof choices === 'string') {
+      choices = choices.split('').join(', ');
+    } else if (Array.isArray(choices)) {
+      choices =  choices.join(', ');
+    } else {
+      choices =  Object.keys(choices).join(', ');
+    }
+    var message = format('Invalid choice: %s (choose from [%s])', value, choices);
+    throw argumentErrorHelper(action, message);
+  }
+};
+
+//
+// Help formatting methods
+//
+
+/**
+ * ArgumentParser#formatUsage -> string
+ *
+ * Return usage string
+ *
+ * See also [original guide][1]
+ *
+ * [1]:http://docs.python.org/dev/library/argparse.html#printing-help
+ **/
+ArgumentParser.prototype.formatUsage = function () {
+  var formatter = this._getFormatter();
+  formatter.addUsage(this.usage, this._actions, this._mutuallyExclusiveGroups);
+  return formatter.formatHelp();
+};
+
+/**
+ * ArgumentParser#formatHelp -> string
+ *
+ * Return help
+ *
+ * See also [original guide][1]
+ *
+ * [1]:http://docs.python.org/dev/library/argparse.html#printing-help
+ **/
+ArgumentParser.prototype.formatHelp = function () {
+  var formatter = this._getFormatter();
+
+  // usage
+  formatter.addUsage(this.usage, this._actions, this._mutuallyExclusiveGroups);
+
+  // description
+  formatter.addText(this.description);
+
+  // positionals, optionals and user-defined groups
+  this._actionGroups.forEach(function (actionGroup) {
+    formatter.startSection(actionGroup.title);
+    formatter.addText(actionGroup.description);
+    formatter.addArguments(actionGroup._groupActions);
+    formatter.endSection();
+  });
+
+  // epilog
+  formatter.addText(this.epilog);
+
+  // determine help from format above
+  return formatter.formatHelp();
+};
+
+ArgumentParser.prototype._getFormatter = function () {
+  var FormatterClass = this.formatterClass;
+  var formatter = new FormatterClass({ prog: this.prog });
+  return formatter;
+};
+
+//
+//  Print functions
+//
+
+/**
+ * ArgumentParser#printUsage() -> Void
+ *
+ * Print usage
+ *
+ * See also [original guide][1]
+ *
+ * [1]:http://docs.python.org/dev/library/argparse.html#printing-help
+ **/
+ArgumentParser.prototype.printUsage = function () {
+  this._printMessage(this.formatUsage());
+};
+
+/**
+ * ArgumentParser#printHelp() -> Void
+ *
+ * Print help
+ *
+ * See also [original guide][1]
+ *
+ * [1]:http://docs.python.org/dev/library/argparse.html#printing-help
+ **/
+ArgumentParser.prototype.printHelp = function () {
+  this._printMessage(this.formatHelp());
+};
+
+ArgumentParser.prototype._printMessage = function (message, stream) {
+  if (!stream) {
+    stream = process.stdout;
+  }
+  if (message) {
+    stream.write('' + message);
+  }
+};
+
+//
+//  Exit functions
+//
+
+/**
+ * ArgumentParser#exit(status=0, message) -> Void
+ * - status (int): exit status
+ * - message (string): message
+ *
+ * Print message in stderr/stdout and exit program
+ **/
+ArgumentParser.prototype.exit = function (status, message) {
+  if (message) {
+    if (status === 0) {
+      this._printMessage(message);
+    } else {
+      this._printMessage(message, process.stderr);
+    }
+  }
+
+  process.exit(status);
+};
+
+/**
+ * ArgumentParser#error(message) -> Void
+ * - err (Error|string): message
+ *
+ * Error method Prints a usage message incorporating the message to stderr and
+ * exits. If you override this in a subclass,
+ * it should not return -- it should
+ * either exit or throw an exception.
+ *
+ **/
+ArgumentParser.prototype.error = function (err) {
+  var message;
+  if (err instanceof Error) {
+    if (this.debug === true) {
+      throw err;
+    }
+    message = err.message;
+  } else {
+    message = err;
+  }
+  var msg = format('%s: error: %s', this.prog, message) + c.EOL;
+
+  if (this.debug === true) {
+    throw new Error(msg);
+  }
+
+  this.printUsage(process.stderr);
+
+  return this.exit(2, msg);
+};
+
+module.exports = ArgumentParser;
diff --git a/tools/doc/node_modules/argparse/lib/const.js b/tools/doc/node_modules/argparse/lib/const.js
new file mode 100644
index 00000000000000..b1fd4ced4e888b
--- /dev/null
+++ b/tools/doc/node_modules/argparse/lib/const.js
@@ -0,0 +1,21 @@
+//
+// Constants
+//
+
+'use strict';
+
+module.exports.EOL = '\n';
+
+module.exports.SUPPRESS = '==SUPPRESS==';
+
+module.exports.OPTIONAL = '?';
+
+module.exports.ZERO_OR_MORE = '*';
+
+module.exports.ONE_OR_MORE = '+';
+
+module.exports.PARSER = 'A...';
+
+module.exports.REMAINDER = '...';
+
+module.exports._UNRECOGNIZED_ARGS_ATTR = '_unrecognized_args';
diff --git a/tools/doc/node_modules/argparse/lib/help/added_formatters.js b/tools/doc/node_modules/argparse/lib/help/added_formatters.js
new file mode 100644
index 00000000000000..f0fbe5da85b4b5
--- /dev/null
+++ b/tools/doc/node_modules/argparse/lib/help/added_formatters.js
@@ -0,0 +1,87 @@
+'use strict';
+
+var util    = require('util');
+
+// Constants
+var c = require('../const');
+
+var $$ = require('../utils');
+var HelpFormatter = require('./formatter.js');
+
+/**
+ * new RawDescriptionHelpFormatter(options)
+ * new ArgumentParser({formatterClass: argparse.RawDescriptionHelpFormatter, ...})
+ *
+ * Help message formatter which adds default values to argument help.
+ *
+ * Only the name of this class is considered a public API. All the methods
+ * provided by the class are considered an implementation detail.
+ **/
+
+function ArgumentDefaultsHelpFormatter(options) {
+  HelpFormatter.call(this, options);
+}
+
+util.inherits(ArgumentDefaultsHelpFormatter, HelpFormatter);
+
+ArgumentDefaultsHelpFormatter.prototype._getHelpString = function (action) {
+  var help = action.help;
+  if (action.help.indexOf('%(defaultValue)s') === -1) {
+    if (action.defaultValue !== c.SUPPRESS) {
+      var defaulting_nargs = [ c.OPTIONAL, c.ZERO_OR_MORE ];
+      if (action.isOptional() || (defaulting_nargs.indexOf(action.nargs) >= 0)) {
+        help += ' (default: %(defaultValue)s)';
+      }
+    }
+  }
+  return help;
+};
+
+module.exports.ArgumentDefaultsHelpFormatter = ArgumentDefaultsHelpFormatter;
+
+/**
+ * new RawDescriptionHelpFormatter(options)
+ * new ArgumentParser({formatterClass: argparse.RawDescriptionHelpFormatter, ...})
+ *
+ * Help message formatter which retains any formatting in descriptions.
+ *
+ * Only the name of this class is considered a public API. All the methods
+ * provided by the class are considered an implementation detail.
+ **/
+
+function RawDescriptionHelpFormatter(options) {
+  HelpFormatter.call(this, options);
+}
+
+util.inherits(RawDescriptionHelpFormatter, HelpFormatter);
+
+RawDescriptionHelpFormatter.prototype._fillText = function (text, width, indent) {
+  var lines = text.split('\n');
+  lines = lines.map(function (line) {
+      return $$.trimEnd(indent + line);
+    });
+  return lines.join('\n');
+};
+module.exports.RawDescriptionHelpFormatter = RawDescriptionHelpFormatter;
+
+/**
+ * new RawTextHelpFormatter(options)
+ * new ArgumentParser({formatterClass: argparse.RawTextHelpFormatter, ...})
+ *
+ * Help message formatter which retains formatting of all help text.
+ *
+ * Only the name of this class is considered a public API. All the methods
+ * provided by the class are considered an implementation detail.
+ **/
+
+function RawTextHelpFormatter(options) {
+  RawDescriptionHelpFormatter.call(this, options);
+}
+
+util.inherits(RawTextHelpFormatter, RawDescriptionHelpFormatter);
+
+RawTextHelpFormatter.prototype._splitLines = function (text) {
+  return text.split('\n');
+};
+
+module.exports.RawTextHelpFormatter = RawTextHelpFormatter;
diff --git a/tools/doc/node_modules/argparse/lib/help/formatter.js b/tools/doc/node_modules/argparse/lib/help/formatter.js
new file mode 100644
index 00000000000000..61c4f41344806d
--- /dev/null
+++ b/tools/doc/node_modules/argparse/lib/help/formatter.js
@@ -0,0 +1,795 @@
+/**
+ * class HelpFormatter
+ *
+ * Formatter for generating usage messages and argument help strings. Only the
+ * name of this class is considered a public API. All the methods provided by
+ * the class are considered an implementation detail.
+ *
+ * Do not call in your code, use this class only for inherits your own forvatter
+ *
+ * ToDo add [additonal formatters][1]
+ *
+ * [1]:http://docs.python.org/dev/library/argparse.html#formatter-class
+ **/
+'use strict';
+
+var sprintf = require('sprintf-js').sprintf;
+
+// Constants
+var c = require('../const');
+
+var $$ = require('../utils');
+
+
+/*:nodoc:* internal
+ * new Support(parent, heding)
+ * - parent (object): parent section
+ * - heading (string): header string
+ *
+ **/
+function Section(parent, heading) {
+  this._parent = parent;
+  this._heading = heading;
+  this._items = [];
+}
+
+/*:nodoc:* internal
+ * Section#addItem(callback) -> Void
+ * - callback (array): tuple with function and args
+ *
+ * Add function for single element
+ **/
+Section.prototype.addItem = function (callback) {
+  this._items.push(callback);
+};
+
+/*:nodoc:* internal
+ * Section#formatHelp(formatter) -> string
+ * - formatter (HelpFormatter): current formatter
+ *
+ * Form help section string
+ *
+ **/
+Section.prototype.formatHelp = function (formatter) {
+  var itemHelp, heading;
+
+  // format the indented section
+  if (this._parent) {
+    formatter._indent();
+  }
+
+  itemHelp = this._items.map(function (item) {
+    var obj, func, args;
+
+    obj = formatter;
+    func = item[0];
+    args = item[1];
+    return func.apply(obj, args);
+  });
+  itemHelp = formatter._joinParts(itemHelp);
+
+  if (this._parent) {
+    formatter._dedent();
+  }
+
+  // return nothing if the section was empty
+  if (!itemHelp) {
+    return '';
+  }
+
+  // add the heading if the section was non-empty
+  heading = '';
+  if (this._heading && this._heading !== c.SUPPRESS) {
+    var currentIndent = formatter.currentIndent;
+    heading = $$.repeat(' ', currentIndent) + this._heading + ':' + c.EOL;
+  }
+
+  // join the section-initialize newline, the heading and the help
+  return formatter._joinParts([ c.EOL, heading, itemHelp, c.EOL ]);
+};
+
+/**
+ * new HelpFormatter(options)
+ *
+ * #### Options:
+ * - `prog`: program name
+ * - `indentIncriment`: indent step, default value 2
+ * - `maxHelpPosition`: max help position, default value = 24
+ * - `width`: line width
+ *
+ **/
+var HelpFormatter = module.exports = function HelpFormatter(options) {
+  options = options || {};
+
+  this._prog = options.prog;
+
+  this._maxHelpPosition = options.maxHelpPosition || 24;
+  this._width = (options.width || ((process.env.COLUMNS || 80) - 2));
+
+  this._currentIndent = 0;
+  this._indentIncriment = options.indentIncriment || 2;
+  this._level = 0;
+  this._actionMaxLength = 0;
+
+  this._rootSection = new Section(null);
+  this._currentSection = this._rootSection;
+
+  this._whitespaceMatcher = new RegExp('\\s+', 'g');
+  this._longBreakMatcher = new RegExp(c.EOL + c.EOL + c.EOL + '+', 'g');
+};
+
+HelpFormatter.prototype._indent = function () {
+  this._currentIndent += this._indentIncriment;
+  this._level += 1;
+};
+
+HelpFormatter.prototype._dedent = function () {
+  this._currentIndent -= this._indentIncriment;
+  this._level -= 1;
+  if (this._currentIndent < 0) {
+    throw new Error('Indent decreased below 0.');
+  }
+};
+
+HelpFormatter.prototype._addItem = function (func, args) {
+  this._currentSection.addItem([ func, args ]);
+};
+
+//
+// Message building methods
+//
+
+/**
+ * HelpFormatter#startSection(heading) -> Void
+ * - heading (string): header string
+ *
+ * Start new help section
+ *
+ * See alse [code example][1]
+ *
+ * ##### Example
+ *
+ *      formatter.startSection(actionGroup.title);
+ *      formatter.addText(actionGroup.description);
+ *      formatter.addArguments(actionGroup._groupActions);
+ *      formatter.endSection();
+ *
+ **/
+HelpFormatter.prototype.startSection = function (heading) {
+  this._indent();
+  var section = new Section(this._currentSection, heading);
+  var func = section.formatHelp.bind(section);
+  this._addItem(func, [ this ]);
+  this._currentSection = section;
+};
+
+/**
+ * HelpFormatter#endSection -> Void
+ *
+ * End help section
+ *
+ * ##### Example
+ *
+ *      formatter.startSection(actionGroup.title);
+ *      formatter.addText(actionGroup.description);
+ *      formatter.addArguments(actionGroup._groupActions);
+ *      formatter.endSection();
+ **/
+HelpFormatter.prototype.endSection = function () {
+  this._currentSection = this._currentSection._parent;
+  this._dedent();
+};
+
+/**
+ * HelpFormatter#addText(text) -> Void
+ * - text (string): plain text
+ *
+ * Add plain text into current section
+ *
+ * ##### Example
+ *
+ *      formatter.startSection(actionGroup.title);
+ *      formatter.addText(actionGroup.description);
+ *      formatter.addArguments(actionGroup._groupActions);
+ *      formatter.endSection();
+ *
+ **/
+HelpFormatter.prototype.addText = function (text) {
+  if (text && text !== c.SUPPRESS) {
+    this._addItem(this._formatText, [ text ]);
+  }
+};
+
+/**
+ * HelpFormatter#addUsage(usage, actions, groups, prefix) -> Void
+ * - usage (string): usage text
+ * - actions (array): actions list
+ * - groups (array): groups list
+ * - prefix (string): usage prefix
+ *
+ * Add usage data into current section
+ *
+ * ##### Example
+ *
+ *      formatter.addUsage(this.usage, this._actions, []);
+ *      return formatter.formatHelp();
+ *
+ **/
+HelpFormatter.prototype.addUsage = function (usage, actions, groups, prefix) {
+  if (usage !== c.SUPPRESS) {
+    this._addItem(this._formatUsage, [ usage, actions, groups, prefix ]);
+  }
+};
+
+/**
+ * HelpFormatter#addArgument(action) -> Void
+ * - action (object): action
+ *
+ * Add argument into current section
+ *
+ * Single variant of [[HelpFormatter#addArguments]]
+ **/
+HelpFormatter.prototype.addArgument = function (action) {
+  if (action.help !== c.SUPPRESS) {
+    var self = this;
+
+    // find all invocations
+    var invocations = [ this._formatActionInvocation(action) ];
+    var invocationLength = invocations[0].length;
+
+    var actionLength;
+
+    if (action._getSubactions) {
+      this._indent();
+      action._getSubactions().forEach(function (subaction) {
+
+        var invocationNew = self._formatActionInvocation(subaction);
+        invocations.push(invocationNew);
+        invocationLength = Math.max(invocationLength, invocationNew.length);
+
+      });
+      this._dedent();
+    }
+
+    // update the maximum item length
+    actionLength = invocationLength + this._currentIndent;
+    this._actionMaxLength = Math.max(this._actionMaxLength, actionLength);
+
+    // add the item to the list
+    this._addItem(this._formatAction, [ action ]);
+  }
+};
+
+/**
+ * HelpFormatter#addArguments(actions) -> Void
+ * - actions (array): actions list
+ *
+ * Mass add arguments into current section
+ *
+ * ##### Example
+ *
+ *      formatter.startSection(actionGroup.title);
+ *      formatter.addText(actionGroup.description);
+ *      formatter.addArguments(actionGroup._groupActions);
+ *      formatter.endSection();
+ *
+ **/
+HelpFormatter.prototype.addArguments = function (actions) {
+  var self = this;
+  actions.forEach(function (action) {
+    self.addArgument(action);
+  });
+};
+
+//
+// Help-formatting methods
+//
+
+/**
+ * HelpFormatter#formatHelp -> string
+ *
+ * Format help
+ *
+ * ##### Example
+ *
+ *      formatter.addText(this.epilog);
+ *      return formatter.formatHelp();
+ *
+ **/
+HelpFormatter.prototype.formatHelp = function () {
+  var help = this._rootSection.formatHelp(this);
+  if (help) {
+    help = help.replace(this._longBreakMatcher, c.EOL + c.EOL);
+    help = $$.trimChars(help, c.EOL) + c.EOL;
+  }
+  return help;
+};
+
+HelpFormatter.prototype._joinParts = function (partStrings) {
+  return partStrings.filter(function (part) {
+    return (part && part !== c.SUPPRESS);
+  }).join('');
+};
+
+HelpFormatter.prototype._formatUsage = function (usage, actions, groups, prefix) {
+  if (!prefix && typeof prefix !== 'string') {
+    prefix = 'usage: ';
+  }
+
+  actions = actions || [];
+  groups = groups || [];
+
+
+  // if usage is specified, use that
+  if (usage) {
+    usage = sprintf(usage, { prog: this._prog });
+
+    // if no optionals or positionals are available, usage is just prog
+  } else if (!usage && actions.length === 0) {
+    usage = this._prog;
+
+    // if optionals and positionals are available, calculate usage
+  } else if (!usage) {
+    var prog = this._prog;
+    var optionals = [];
+    var positionals = [];
+    var actionUsage;
+    var textWidth;
+
+    // split optionals from positionals
+    actions.forEach(function (action) {
+      if (action.isOptional()) {
+        optionals.push(action);
+      } else {
+        positionals.push(action);
+      }
+    });
+
+    // build full usage string
+    actionUsage = this._formatActionsUsage([].concat(optionals, positionals), groups);
+    usage = [ prog, actionUsage ].join(' ');
+
+    // wrap the usage parts if it's too long
+    textWidth = this._width - this._currentIndent;
+    if ((prefix.length + usage.length) > textWidth) {
+
+      // break usage into wrappable parts
+      var regexpPart = new RegExp('\\(.*?\\)+|\\[.*?\\]+|\\S+', 'g');
+      var optionalUsage = this._formatActionsUsage(optionals, groups);
+      var positionalUsage = this._formatActionsUsage(positionals, groups);
+
+
+      var optionalParts = optionalUsage.match(regexpPart);
+      var positionalParts = positionalUsage.match(regexpPart) || [];
+
+      if (optionalParts.join(' ') !== optionalUsage) {
+        throw new Error('assert "optionalParts.join(\' \') === optionalUsage"');
+      }
+      if (positionalParts.join(' ') !== positionalUsage) {
+        throw new Error('assert "positionalParts.join(\' \') === positionalUsage"');
+      }
+
+      // helper for wrapping lines
+      /*eslint-disable func-style*/ // node 0.10 compat
+      var _getLines = function (parts, indent, prefix) {
+        var lines = [];
+        var line = [];
+
+        var lineLength = prefix ? prefix.length - 1 : indent.length - 1;
+
+        parts.forEach(function (part) {
+          if (lineLength + 1 + part.length > textWidth) {
+            lines.push(indent + line.join(' '));
+            line = [];
+            lineLength = indent.length - 1;
+          }
+          line.push(part);
+          lineLength += part.length + 1;
+        });
+
+        if (line) {
+          lines.push(indent + line.join(' '));
+        }
+        if (prefix) {
+          lines[0] = lines[0].substr(indent.length);
+        }
+        return lines;
+      };
+
+      var lines, indent, parts;
+      // if prog is short, follow it with optionals or positionals
+      if (prefix.length + prog.length <= 0.75 * textWidth) {
+        indent = $$.repeat(' ', (prefix.length + prog.length + 1));
+        if (optionalParts) {
+          lines = [].concat(
+            _getLines([ prog ].concat(optionalParts), indent, prefix),
+            _getLines(positionalParts, indent)
+          );
+        } else if (positionalParts) {
+          lines = _getLines([ prog ].concat(positionalParts), indent, prefix);
+        } else {
+          lines = [ prog ];
+        }
+
+        // if prog is long, put it on its own line
+      } else {
+        indent = $$.repeat(' ', prefix.length);
+        parts = optionalParts + positionalParts;
+        lines = _getLines(parts, indent);
+        if (lines.length > 1) {
+          lines = [].concat(
+            _getLines(optionalParts, indent),
+            _getLines(positionalParts, indent)
+          );
+        }
+        lines = [ prog ] + lines;
+      }
+      // join lines into usage
+      usage = lines.join(c.EOL);
+    }
+  }
+
+  // prefix with 'usage:'
+  return prefix + usage + c.EOL + c.EOL;
+};
+
+HelpFormatter.prototype._formatActionsUsage = function (actions, groups) {
+  // find group indices and identify actions in groups
+  var groupActions = [];
+  var inserts = [];
+  var self = this;
+
+  groups.forEach(function (group) {
+    var end;
+    var i;
+
+    var start = actions.indexOf(group._groupActions[0]);
+    if (start >= 0) {
+      end = start + group._groupActions.length;
+
+      //if (actions.slice(start, end) === group._groupActions) {
+      if ($$.arrayEqual(actions.slice(start, end), group._groupActions)) {
+        group._groupActions.forEach(function (action) {
+          groupActions.push(action);
+        });
+
+        if (!group.required) {
+          if (inserts[start]) {
+            inserts[start] += ' [';
+          } else {
+            inserts[start] = '[';
+          }
+          inserts[end] = ']';
+        } else {
+          if (inserts[start]) {
+            inserts[start] += ' (';
+          } else {
+            inserts[start] = '(';
+          }
+          inserts[end] = ')';
+        }
+        for (i = start + 1; i < end; i += 1) {
+          inserts[i] = '|';
+        }
+      }
+    }
+  });
+
+  // collect all actions format strings
+  var parts = [];
+
+  actions.forEach(function (action, actionIndex) {
+    var part;
+    var optionString;
+    var argsDefault;
+    var argsString;
+
+    // suppressed arguments are marked with None
+    // remove | separators for suppressed arguments
+    if (action.help === c.SUPPRESS) {
+      parts.push(null);
+      if (inserts[actionIndex] === '|') {
+        inserts.splice(actionIndex, actionIndex);
+      } else if (inserts[actionIndex + 1] === '|') {
+        inserts.splice(actionIndex + 1, actionIndex + 1);
+      }
+
+      // produce all arg strings
+    } else if (!action.isOptional()) {
+      part = self._formatArgs(action, action.dest);
+
+      // if it's in a group, strip the outer []
+      if (groupActions.indexOf(action) >= 0) {
+        if (part[0] === '[' && part[part.length - 1] === ']') {
+          part = part.slice(1, -1);
+        }
+      }
+      // add the action string to the list
+      parts.push(part);
+
+    // produce the first way to invoke the option in brackets
+    } else {
+      optionString = action.optionStrings[0];
+
+      // if the Optional doesn't take a value, format is: -s or --long
+      if (action.nargs === 0) {
+        part = '' + optionString;
+
+      // if the Optional takes a value, format is: -s ARGS or --long ARGS
+      } else {
+        argsDefault = action.dest.toUpperCase();
+        argsString = self._formatArgs(action, argsDefault);
+        part = optionString + ' ' + argsString;
+      }
+      // make it look optional if it's not required or in a group
+      if (!action.required && groupActions.indexOf(action) < 0) {
+        part = '[' + part + ']';
+      }
+      // add the action string to the list
+      parts.push(part);
+    }
+  });
+
+  // insert things at the necessary indices
+  for (var i = inserts.length - 1; i >= 0; --i) {
+    if (inserts[i] !== null) {
+      parts.splice(i, 0, inserts[i]);
+    }
+  }
+
+  // join all the action items with spaces
+  var text = parts.filter(function (part) {
+    return !!part;
+  }).join(' ');
+
+  // clean up separators for mutually exclusive groups
+  text = text.replace(/([\[(]) /g, '$1'); // remove spaces
+  text = text.replace(/ ([\])])/g, '$1');
+  text = text.replace(/\[ *\]/g, ''); // remove empty groups
+  text = text.replace(/\( *\)/g, '');
+  text = text.replace(/\(([^|]*)\)/g, '$1'); // remove () from single action groups
+
+  text = text.trim();
+
+  // return the text
+  return text;
+};
+
+HelpFormatter.prototype._formatText = function (text) {
+  text = sprintf(text, { prog: this._prog });
+  var textWidth = this._width - this._currentIndent;
+  var indentIncriment = $$.repeat(' ', this._currentIndent);
+  return this._fillText(text, textWidth, indentIncriment) + c.EOL + c.EOL;
+};
+
+HelpFormatter.prototype._formatAction = function (action) {
+  var self = this;
+
+  var helpText;
+  var helpLines;
+  var parts;
+  var indentFirst;
+
+  // determine the required width and the entry label
+  var helpPosition = Math.min(this._actionMaxLength + 2, this._maxHelpPosition);
+  var helpWidth = this._width - helpPosition;
+  var actionWidth = helpPosition - this._currentIndent - 2;
+  var actionHeader = this._formatActionInvocation(action);
+
+  // no help; start on same line and add a final newline
+  if (!action.help) {
+    actionHeader = $$.repeat(' ', this._currentIndent) + actionHeader + c.EOL;
+
+  // short action name; start on the same line and pad two spaces
+  } else if (actionHeader.length <= actionWidth) {
+    actionHeader = $$.repeat(' ', this._currentIndent) +
+        actionHeader +
+        '  ' +
+        $$.repeat(' ', actionWidth - actionHeader.length);
+    indentFirst = 0;
+
+  // long action name; start on the next line
+  } else {
+    actionHeader = $$.repeat(' ', this._currentIndent) + actionHeader + c.EOL;
+    indentFirst = helpPosition;
+  }
+
+  // collect the pieces of the action help
+  parts = [ actionHeader ];
+
+  // if there was help for the action, add lines of help text
+  if (action.help) {
+    helpText = this._expandHelp(action);
+    helpLines = this._splitLines(helpText, helpWidth);
+    parts.push($$.repeat(' ', indentFirst) + helpLines[0] + c.EOL);
+    helpLines.slice(1).forEach(function (line) {
+      parts.push($$.repeat(' ', helpPosition) + line + c.EOL);
+    });
+
+  // or add a newline if the description doesn't end with one
+  } else if (actionHeader.charAt(actionHeader.length - 1) !== c.EOL) {
+    parts.push(c.EOL);
+  }
+  // if there are any sub-actions, add their help as well
+  if (action._getSubactions) {
+    this._indent();
+    action._getSubactions().forEach(function (subaction) {
+      parts.push(self._formatAction(subaction));
+    });
+    this._dedent();
+  }
+  // return a single string
+  return this._joinParts(parts);
+};
+
+HelpFormatter.prototype._formatActionInvocation = function (action) {
+  if (!action.isOptional()) {
+    var format_func = this._metavarFormatter(action, action.dest);
+    var metavars = format_func(1);
+    return metavars[0];
+  }
+
+  var parts = [];
+  var argsDefault;
+  var argsString;
+
+  // if the Optional doesn't take a value, format is: -s, --long
+  if (action.nargs === 0) {
+    parts = parts.concat(action.optionStrings);
+
+  // if the Optional takes a value, format is: -s ARGS, --long ARGS
+  } else {
+    argsDefault = action.dest.toUpperCase();
+    argsString = this._formatArgs(action, argsDefault);
+    action.optionStrings.forEach(function (optionString) {
+      parts.push(optionString + ' ' + argsString);
+    });
+  }
+  return parts.join(', ');
+};
+
+HelpFormatter.prototype._metavarFormatter = function (action, metavarDefault) {
+  var result;
+
+  if (action.metavar || action.metavar === '') {
+    result = action.metavar;
+  } else if (action.choices) {
+    var choices = action.choices;
+
+    if (typeof choices === 'string') {
+      choices = choices.split('').join(', ');
+    } else if (Array.isArray(choices)) {
+      choices = choices.join(',');
+    } else {
+      choices = Object.keys(choices).join(',');
+    }
+    result = '{' + choices + '}';
+  } else {
+    result = metavarDefault;
+  }
+
+  return function (size) {
+    if (Array.isArray(result)) {
+      return result;
+    }
+
+    var metavars = [];
+    for (var i = 0; i < size; i += 1) {
+      metavars.push(result);
+    }
+    return metavars;
+  };
+};
+
+HelpFormatter.prototype._formatArgs = function (action, metavarDefault) {
+  var result;
+  var metavars;
+
+  var buildMetavar = this._metavarFormatter(action, metavarDefault);
+
+  switch (action.nargs) {
+  /*eslint-disable no-undefined*/
+  case undefined:
+  case null:
+    metavars = buildMetavar(1);
+    result = '' + metavars[0];
+    break;
+  case c.OPTIONAL:
+    metavars = buildMetavar(1);
+    result = '[' + metavars[0] + ']';
+    break;
+  case c.ZERO_OR_MORE:
+    metavars = buildMetavar(2);
+    result = '[' + metavars[0] + ' [' + metavars[1] + ' ...]]';
+    break;
+  case c.ONE_OR_MORE:
+    metavars = buildMetavar(2);
+    result = '' + metavars[0] + ' [' + metavars[1] + ' ...]';
+    break;
+  case c.REMAINDER:
+    result = '...';
+    break;
+  case c.PARSER:
+    metavars = buildMetavar(1);
+    result = metavars[0] + ' ...';
+    break;
+  default:
+    metavars = buildMetavar(action.nargs);
+    result = metavars.join(' ');
+  }
+  return result;
+};
+
+HelpFormatter.prototype._expandHelp = function (action) {
+  var params = { prog: this._prog };
+
+  Object.keys(action).forEach(function (actionProperty) {
+    var actionValue = action[actionProperty];
+
+    if (actionValue !== c.SUPPRESS) {
+      params[actionProperty] = actionValue;
+    }
+  });
+
+  if (params.choices) {
+    if (typeof params.choices === 'string') {
+      params.choices = params.choices.split('').join(', ');
+    } else if (Array.isArray(params.choices)) {
+      params.choices = params.choices.join(', ');
+    } else {
+      params.choices = Object.keys(params.choices).join(', ');
+    }
+  }
+
+  return sprintf(this._getHelpString(action), params);
+};
+
+HelpFormatter.prototype._splitLines = function (text, width) {
+  var lines = [];
+  var delimiters = [ ' ', '.', ',', '!', '?' ];
+  var re = new RegExp('[' + delimiters.join('') + '][^' + delimiters.join('') + ']*$');
+
+  text = text.replace(/[\n\|\t]/g, ' ');
+
+  text = text.trim();
+  text = text.replace(this._whitespaceMatcher, ' ');
+
+  // Wraps the single paragraph in text (a string) so every line
+  // is at most width characters long.
+  text.split(c.EOL).forEach(function (line) {
+    if (width >= line.length) {
+      lines.push(line);
+      return;
+    }
+
+    var wrapStart = 0;
+    var wrapEnd = width;
+    var delimiterIndex = 0;
+    while (wrapEnd <= line.length) {
+      if (wrapEnd !== line.length && delimiters.indexOf(line[wrapEnd] < -1)) {
+        delimiterIndex = (re.exec(line.substring(wrapStart, wrapEnd)) || {}).index;
+        wrapEnd = wrapStart + delimiterIndex + 1;
+      }
+      lines.push(line.substring(wrapStart, wrapEnd));
+      wrapStart = wrapEnd;
+      wrapEnd += width;
+    }
+    if (wrapStart < line.length) {
+      lines.push(line.substring(wrapStart, wrapEnd));
+    }
+  });
+
+  return lines;
+};
+
+HelpFormatter.prototype._fillText = function (text, width, indent) {
+  var lines = this._splitLines(text, width);
+  lines = lines.map(function (line) {
+    return indent + line;
+  });
+  return lines.join(c.EOL);
+};
+
+HelpFormatter.prototype._getHelpString = function (action) {
+  return action.help;
+};
diff --git a/tools/doc/node_modules/argparse/lib/namespace.js b/tools/doc/node_modules/argparse/lib/namespace.js
new file mode 100644
index 00000000000000..a860de9ecc48dd
--- /dev/null
+++ b/tools/doc/node_modules/argparse/lib/namespace.js
@@ -0,0 +1,76 @@
+/**
+ * class Namespace
+ *
+ * Simple object for storing attributes. Implements equality by attribute names
+ * and values, and provides a simple string representation.
+ *
+ * See also [original guide][1]
+ *
+ * [1]:http://docs.python.org/dev/library/argparse.html#the-namespace-object
+ **/
+'use strict';
+
+var $$ = require('./utils');
+
+/**
+ * new Namespace(options)
+ * - options(object): predefined propertis for result object
+ *
+ **/
+var Namespace = module.exports = function Namespace(options) {
+  $$.extend(this, options);
+};
+
+/**
+ * Namespace#isset(key) -> Boolean
+ * - key (string|number): property name
+ *
+ * Tells whenever `namespace` contains given `key` or not.
+ **/
+Namespace.prototype.isset = function (key) {
+  return $$.has(this, key);
+};
+
+/**
+ * Namespace#set(key, value) -> self
+ * -key (string|number|object): propery name
+ * -value (mixed): new property value
+ *
+ * Set the property named key with value.
+ * If key object then set all key properties to namespace object
+ **/
+Namespace.prototype.set = function (key, value) {
+  if (typeof (key) === 'object') {
+    $$.extend(this, key);
+  } else {
+    this[key] = value;
+  }
+  return this;
+};
+
+/**
+ * Namespace#get(key, defaultValue) -> mixed
+ * - key (string|number): property name
+ * - defaultValue (mixed): default value
+ *
+ * Return the property key or defaulValue if not set
+ **/
+Namespace.prototype.get = function (key, defaultValue) {
+  return !this[key] ? defaultValue : this[key];
+};
+
+/**
+ * Namespace#unset(key, defaultValue) -> mixed
+ * - key (string|number): property name
+ * - defaultValue (mixed): default value
+ *
+ * Return data[key](and delete it) or defaultValue
+ **/
+Namespace.prototype.unset = function (key, defaultValue) {
+  var value = this[key];
+  if (value !== null) {
+    delete this[key];
+    return value;
+  }
+  return defaultValue;
+};
diff --git a/tools/doc/node_modules/argparse/lib/utils.js b/tools/doc/node_modules/argparse/lib/utils.js
new file mode 100644
index 00000000000000..4a9cf3edb615ce
--- /dev/null
+++ b/tools/doc/node_modules/argparse/lib/utils.js
@@ -0,0 +1,57 @@
+'use strict';
+
+exports.repeat = function (str, num) {
+  var result = '';
+  for (var i = 0; i < num; i++) { result += str; }
+  return result;
+};
+
+exports.arrayEqual = function (a, b) {
+  if (a.length !== b.length) { return false; }
+  for (var i = 0; i < a.length; i++) {
+    if (a[i] !== b[i]) { return false; }
+  }
+  return true;
+};
+
+exports.trimChars = function (str, chars) {
+  var start = 0;
+  var end = str.length - 1;
+  while (chars.indexOf(str.charAt(start)) >= 0) { start++; }
+  while (chars.indexOf(str.charAt(end)) >= 0) { end--; }
+  return str.slice(start, end + 1);
+};
+
+exports.capitalize = function (str) {
+  return str.charAt(0).toUpperCase() + str.slice(1);
+};
+
+exports.arrayUnion = function () {
+  var result = [];
+  for (var i = 0, values = {}; i < arguments.length; i++) {
+    var arr = arguments[i];
+    for (var j = 0; j < arr.length; j++) {
+      if (!values[arr[j]]) {
+        values[arr[j]] = true;
+        result.push(arr[j]);
+      }
+    }
+  }
+  return result;
+};
+
+function has(obj, key) {
+  return Object.prototype.hasOwnProperty.call(obj, key);
+}
+
+exports.has = has;
+
+exports.extend = function (dest, src) {
+  for (var i in src) {
+    if (has(src, i)) { dest[i] = src[i]; }
+  }
+};
+
+exports.trimEnd = function (str) {
+  return str.replace(/\s+$/g, '');
+};
diff --git a/tools/doc/node_modules/argparse/package.json b/tools/doc/node_modules/argparse/package.json
new file mode 100644
index 00000000000000..d7bc154dbcaf3a
--- /dev/null
+++ b/tools/doc/node_modules/argparse/package.json
@@ -0,0 +1,104 @@
+{
+  "_args": [
+    [
+      {
+        "name": "argparse",
+        "raw": "argparse@^1.0.7",
+        "rawSpec": "^1.0.7",
+        "scope": null,
+        "spec": ">=1.0.7 <2.0.0",
+        "type": "range"
+      },
+      "/Users/svairamani/git/node/tools/doc/node_modules/js-yaml"
+    ]
+  ],
+  "_from": "argparse@>=1.0.7 <2.0.0",
+  "_id": "argparse@1.0.7",
+  "_inCache": true,
+  "_installable": true,
+  "_location": "/argparse",
+  "_nodeVersion": "4.3.0",
+  "_npmOperationalInternal": {
+    "host": "packages-12-west.internal.npmjs.com",
+    "tmp": "tmp/argparse-1.0.7.tgz_1458226887302_0.8524546672124416"
+  },
+  "_npmUser": {
+    "email": "vitaly@rcdesign.ru",
+    "name": "vitaly"
+  },
+  "_npmVersion": "2.14.12",
+  "_phantomChildren": {},
+  "_requested": {
+    "name": "argparse",
+    "raw": "argparse@^1.0.7",
+    "rawSpec": "^1.0.7",
+    "scope": null,
+    "spec": ">=1.0.7 <2.0.0",
+    "type": "range"
+  },
+  "_requiredBy": [
+    "/js-yaml"
+  ],
+  "_resolved": "http://npm.paypal.com/argparse/-/argparse-1.0.7.tgz",
+  "_shasum": "c289506480557810f14a8bc62d7a06f63ed7f951",
+  "_shrinkwrap": null,
+  "_spec": "argparse@^1.0.7",
+  "_where": "/Users/svairamani/git/node/tools/doc/node_modules/js-yaml",
+  "bugs": {
+    "url": "https://github.com/nodeca/argparse/issues"
+  },
+  "contributors": [
+    {
+      "name": "Eugene Shkuropat"
+    },
+    {
+      "name": "Paul Jacobson"
+    }
+  ],
+  "dependencies": {
+    "sprintf-js": "~1.0.2"
+  },
+  "description": "Very powerful CLI arguments parser. Native port of argparse - python's options parsing library",
+  "devDependencies": {
+    "eslint": "2.0.0-rc.0",
+    "eslint-plugin-nodeca": "~1.0.3",
+    "mocha": "*",
+    "ndoc": "^3.1.0"
+  },
+  "directories": {},
+  "dist": {
+    "shasum": "c289506480557810f14a8bc62d7a06f63ed7f951",
+    "tarball": "http://npm.paypal.com/argparse/-/argparse-1.0.7.tgz"
+  },
+  "files": [
+    "index.js",
+    "lib/"
+  ],
+  "gitHead": "2d243d3062affb01f49f5f00e8ca8464a15e9374",
+  "homepage": "https://github.com/nodeca/argparse",
+  "keywords": [
+    "cli",
+    "parser",
+    "argparse",
+    "option",
+    "args"
+  ],
+  "license": "MIT",
+  "maintainers": [
+    {
+      "email": "vitaly@rcdesign.ru",
+      "name": "vitaly"
+    }
+  ],
+  "name": "argparse",
+  "optionalDependencies": {},
+  "readme": "ERROR: No README data found!",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/nodeca/argparse.git"
+  },
+  "scripts": {
+    "test": "make test"
+  },
+  "version": "1.0.7"
+}
diff --git a/tools/doc/node_modules/esprima/ChangeLog b/tools/doc/node_modules/esprima/ChangeLog
new file mode 100644
index 00000000000000..864ab696199e2c
--- /dev/null
+++ b/tools/doc/node_modules/esprima/ChangeLog
@@ -0,0 +1,170 @@
+2016-02-02: Version 2.7.2
+
+      * Fix out-of-bound error location in an invalid string literal (issue 1457)
+      * Fix shorthand object destructuring defaults in variable declarations (issue 1459)
+
+2015-12-10: Version 2.7.1
+
+      * Do not allow trailing comma in a variable declaration (issue 1360)
+      * Fix assignment to `let` in non-strict mode (issue 1376)
+      * Fix missing delegate property in YieldExpression (issue 1407)
+
+2015-10-22: Version 2.7.0
+
+      * Fix the handling of semicolon in a break statement (issue 1044)
+      * Run the test suite with major web browsers (issue 1259, 1317)
+      * Allow `let` as an identifier in non-strict mode (issue 1289)
+      * Attach orphaned comments as `innerComments` (issue 1328)
+      * Add the support for token delegator (issue 1332)
+
+2015-09-01: Version 2.6.0
+
+      * Properly allow or prohibit `let` in a binding identifier/pattern (issue 1048, 1098)
+      * Add sourceType field for Program node (issue 1159)
+      * Ensure that strict mode reserved word binding throw an error (issue 1171)
+      * Run the test suite with Node.js and IE 11 on Windows (issue 1294)
+      * Allow binding pattern with no initializer in a for statement (issue 1301)
+
+2015-07-31: Version 2.5.0
+
+      * Run the test suite in a browser environment (issue 1004)
+      * Ensure a comma between imported default binding and named imports (issue 1046)
+      * Distinguish `yield` as a keyword vs an identifier (issue 1186)
+      * Support ES6 meta property `new.target` (issue 1203)
+      * Fix the syntax node for yield with expression (issue 1223)
+      * Fix the check of duplicated proto in property names (issue 1225)
+      * Fix ES6 Unicode escape in identifier name (issue 1229)
+      * Support ES6 IdentifierStart and IdentifierPart (issue 1232)
+      * Treat await as a reserved word when parsing as a module (issue 1234)
+      * Recognize identifier characters from Unicode SMP (issue 1244)
+      * Ensure that export and import can be followed by a comma (issue 1250)
+      * Fix yield operator precedence (issue 1262)
+
+2015-07-01: Version 2.4.1
+
+      * Fix some cases of comment attachment (issue 1071, 1175)
+      * Fix the handling of destructuring in function arguments (issue 1193)
+      * Fix invalid ranges in assignment expression (issue 1201)
+
+2015-06-26: Version 2.4.0
+
+      * Support ES6 for-of iteration (issue 1047)
+      * Support ES6 spread arguments (issue 1169)
+      * Minimize npm payload (issue 1191)
+
+2015-06-16: Version 2.3.0
+
+      * Support ES6 generator (issue 1033)
+      * Improve parsing of regular expressions with `u` flag (issue 1179)
+
+2015-04-17: Version 2.2.0
+
+      * Support ES6 import and export declarations (issue 1000)
+      * Fix line terminator before arrow not recognized as error (issue 1009)
+      * Support ES6 destructuring (issue 1045)
+      * Support ES6 template literal (issue 1074)
+      * Fix the handling of invalid/incomplete string escape sequences (issue 1106)
+      * Fix ES3 static member access restriction (issue 1120)
+      * Support for `super` in ES6 class (issue 1147)
+
+2015-03-09: Version 2.1.0
+
+      * Support ES6 class (issue 1001)
+      * Support ES6 rest parameter (issue 1011)
+      * Expand the location of property getter, setter, and methods (issue 1029)
+      * Enable TryStatement transition to a single handler (issue 1031)
+      * Support ES6 computed property name (issue 1037)
+      * Tolerate unclosed block comment (issue 1041)
+      * Support ES6 lexical declaration (issue 1065)
+
+2015-02-06: Version 2.0.0
+
+      * Support ES6 arrow function (issue 517)
+      * Support ES6 Unicode code point escape (issue 521)
+      * Improve the speed and accuracy of comment attachment (issue 522)
+      * Support ES6 default parameter (issue 519)
+      * Support ES6 regular expression flags (issue 557)
+      * Fix scanning of implicit octal literals (issue 565)
+      * Fix the handling of automatic semicolon insertion (issue 574)
+      * Support ES6 method definition (issue 620)
+      * Support ES6 octal integer literal (issue 621)
+      * Support ES6 binary integer literal (issue 622)
+      * Support ES6 object literal property value shorthand (issue 624)
+
+2015-03-03: Version 1.2.5
+
+      * Fix scanning of implicit octal literals (issue 565)
+
+2015-02-05: Version 1.2.4
+
+      * Fix parsing of LeftHandSideExpression in ForInStatement (issue 560)
+      * Fix the handling of automatic semicolon insertion (issue 574)
+
+2015-01-18: Version 1.2.3
+
+      * Fix division by this (issue 616)
+
+2014-05-18: Version 1.2.2
+
+      * Fix duplicated tokens when collecting comments (issue 537)
+
+2014-05-04: Version 1.2.1
+
+      * Ensure that Program node may still have leading comments (issue 536)
+
+2014-04-29: Version 1.2.0
+
+      * Fix semicolon handling for expression statement (issue 462, 533)
+      * Disallow escaped characters in regular expression flags (issue 503)
+      * Performance improvement for location tracking (issue 520)
+      * Improve the speed of comment attachment (issue 522)
+
+2014-03-26: Version 1.1.1
+
+      * Fix token handling of forward slash after an array literal (issue 512)
+
+2014-03-23: Version 1.1.0
+
+      * Optionally attach comments to the owning syntax nodes (issue 197)
+      * Simplify binary parsing with stack-based shift reduce (issue 352)
+      * Always include the raw source of literals (issue 376)
+      * Add optional input source information (issue 386)
+      * Tokenizer API for pure lexical scanning (issue 398)
+      * Improve the web site and its online demos (issue 337, 400, 404)
+      * Performance improvement for location tracking (issue 417, 424)
+      * Support HTML comment syntax (issue 451)
+      * Drop support for legacy browsers (issue 474)
+
+2013-08-27: Version 1.0.4
+
+      * Minimize the payload for packages (issue 362)
+      * Fix missing cases on an empty switch statement (issue 436)
+      * Support escaped ] in regexp literal character classes (issue 442)
+      * Tolerate invalid left-hand side expression (issue 130)
+
+2013-05-17: Version 1.0.3
+
+      * Variable declaration needs at least one declarator (issue 391)
+      * Fix benchmark's variance unit conversion (issue 397)
+      * IE < 9: \v should be treated as vertical tab (issue 405)
+      * Unary expressions should always have prefix: true (issue 418)
+      * Catch clause should only accept an identifier (issue 423)
+      * Tolerate setters without parameter (issue 426)
+
+2012-11-02: Version 1.0.2
+
+    Improvement:
+
+      * Fix esvalidate JUnit output upon a syntax error (issue 374)
+
+2012-10-28: Version 1.0.1
+
+    Improvements:
+
+      * esvalidate understands shebang in a Unix shell script (issue 361)
+      * esvalidate treats fatal parsing failure as an error (issue 361)
+      * Reduce Node.js package via .npmignore (issue 362)
+
+2012-10-22: Version 1.0.0
+
+    Initial release.
diff --git a/tools/doc/node_modules/esprima/LICENSE.BSD b/tools/doc/node_modules/esprima/LICENSE.BSD
new file mode 100644
index 00000000000000..17557eceb90690
--- /dev/null
+++ b/tools/doc/node_modules/esprima/LICENSE.BSD
@@ -0,0 +1,21 @@
+Copyright (c) jQuery Foundation, Inc. and Contributors, 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.
+
+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.
diff --git a/tools/doc/node_modules/esprima/README.md b/tools/doc/node_modules/esprima/README.md
new file mode 100644
index 00000000000000..749454f44995ed
--- /dev/null
+++ b/tools/doc/node_modules/esprima/README.md
@@ -0,0 +1,27 @@
+[![NPM version](https://img.shields.io/npm/v/esprima.svg)](https://www.npmjs.com/package/esprima)
+[![npm download](https://img.shields.io/npm/dm/esprima.svg)](https://www.npmjs.com/package/esprima)
+[![Build Status](https://img.shields.io/travis/jquery/esprima/master.svg)](https://travis-ci.org/jquery/esprima)
+[![Coverage Status](https://img.shields.io/codecov/c/github/jquery/esprima/master.svg)](https://codecov.io/github/jquery/esprima)
+
+**Esprima** ([esprima.org](http://esprima.org), BSD license) is a high performance,
+standard-compliant [ECMAScript](http://www.ecma-international.org/publications/standards/Ecma-262.htm)
+parser written in ECMAScript (also popularly known as
+[JavaScript](https://en.wikipedia.org/wiki/JavaScript)).
+Esprima is created and maintained by [Ariya Hidayat](https://twitter.com/ariyahidayat),
+with the help of [many contributors](https://github.com/jquery/esprima/contributors).
+
+### Features
+
+- Full support for ECMAScript 6 ([ECMA-262](http://www.ecma-international.org/publications/standards/Ecma-262.htm))
+- Sensible [syntax tree format](https://github.com/estree/estree/blob/master/spec.md) as standardized by [ESTree project](https://github.com/estree/estree)
+- Optional tracking of syntax node location (index-based and line-column)
+- [Heavily tested](http://esprima.org/test/ci.html) (~1250 [unit tests](https://github.com/jquery/esprima/tree/master/test/fixtures) with [full code coverage](https://codecov.io/github/jquery/esprima))
+
+Esprima serves as a **building block** for some JavaScript
+language tools, from [code instrumentation](http://esprima.org/demo/functiontrace.html)
+to [editor autocompletion](http://esprima.org/demo/autocomplete.html).
+
+Esprima runs on many popular web browsers, as well as other ECMAScript platforms such as
+[Rhino](http://www.mozilla.org/rhino), [Nashorn](http://openjdk.java.net/projects/nashorn/), and [Node.js](https://npmjs.org/package/esprima).
+
+For more information, check the web site [esprima.org](http://esprima.org).
diff --git a/tools/doc/node_modules/esprima/bin/esparse.js b/tools/doc/node_modules/esprima/bin/esparse.js
new file mode 100755
index 00000000000000..98bdbf48f2629e
--- /dev/null
+++ b/tools/doc/node_modules/esprima/bin/esparse.js
@@ -0,0 +1,126 @@
+#!/usr/bin/env node
+/*
+  Copyright (c) jQuery Foundation, Inc. and Contributors, 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.
+
+  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 sloppy:true node:true rhino:true */
+
+var fs, esprima, fname, content, options, syntax;
+
+if (typeof require === 'function') {
+    fs = require('fs');
+    esprima = require('esprima');
+} else if (typeof load === 'function') {
+    try {
+        load('esprima.js');
+    } catch (e) {
+        load('../esprima.js');
+    }
+}
+
+// Shims to Node.js objects when running under Rhino.
+if (typeof console === 'undefined' && typeof process === 'undefined') {
+    console = { log: print };
+    fs = { readFileSync: readFile };
+    process = { argv: arguments, exit: quit };
+    process.argv.unshift('esparse.js');
+    process.argv.unshift('rhino');
+}
+
+function showUsage() {
+    console.log('Usage:');
+    console.log('   esparse [options] file.js');
+    console.log();
+    console.log('Available options:');
+    console.log();
+    console.log('  --comment      Gather all line and block comments in an array');
+    console.log('  --loc          Include line-column location info for each syntax node');
+    console.log('  --range        Include index-based range for each syntax node');
+    console.log('  --raw          Display the raw value of literals');
+    console.log('  --tokens       List all tokens in an array');
+    console.log('  --tolerant     Tolerate errors on a best-effort basis (experimental)');
+    console.log('  -v, --version  Shows program version');
+    console.log();
+    process.exit(1);
+}
+
+if (process.argv.length <= 2) {
+    showUsage();
+}
+
+options = {};
+
+process.argv.splice(2).forEach(function (entry) {
+
+    if (entry === '-h' || entry === '--help') {
+        showUsage();
+    } else if (entry === '-v' || entry === '--version') {
+        console.log('ECMAScript Parser (using Esprima version', esprima.version, ')');
+        console.log();
+        process.exit(0);
+    } else if (entry === '--comment') {
+        options.comment = true;
+    } else if (entry === '--loc') {
+        options.loc = true;
+    } else if (entry === '--range') {
+        options.range = true;
+    } else if (entry === '--raw') {
+        options.raw = true;
+    } else if (entry === '--tokens') {
+        options.tokens = true;
+    } else if (entry === '--tolerant') {
+        options.tolerant = true;
+    } else if (entry.slice(0, 2) === '--') {
+        console.log('Error: unknown option ' + entry + '.');
+        process.exit(1);
+    } else if (typeof fname === 'string') {
+        console.log('Error: more than one input file.');
+        process.exit(1);
+    } else {
+        fname = entry;
+    }
+});
+
+if (typeof fname !== 'string') {
+    console.log('Error: no input file.');
+    process.exit(1);
+}
+
+// Special handling for regular expression literal since we need to
+// convert it to a string literal, otherwise it will be decoded
+// as object "{}" and the regular expression would be lost.
+function adjustRegexLiteral(key, value) {
+    if (key === 'value' && value instanceof RegExp) {
+        value = value.toString();
+    }
+    return value;
+}
+
+try {
+    content = fs.readFileSync(fname, 'utf-8');
+    syntax = esprima.parse(content, options);
+    console.log(JSON.stringify(syntax, adjustRegexLiteral, 4));
+} catch (e) {
+    console.log('Error: ' + e.message);
+    process.exit(1);
+}
diff --git a/tools/doc/node_modules/esprima/bin/esvalidate.js b/tools/doc/node_modules/esprima/bin/esvalidate.js
new file mode 100755
index 00000000000000..f522dec290b707
--- /dev/null
+++ b/tools/doc/node_modules/esprima/bin/esvalidate.js
@@ -0,0 +1,199 @@
+#!/usr/bin/env node
+/*
+  Copyright (c) jQuery Foundation, Inc. and Contributors, 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.
+
+  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 sloppy:true plusplus:true node:true rhino:true */
+/*global phantom:true */
+
+var fs, system, esprima, options, fnames, count;
+
+if (typeof esprima === 'undefined') {
+    // PhantomJS can only require() relative files
+    if (typeof phantom === 'object') {
+        fs = require('fs');
+        system = require('system');
+        esprima = require('./esprima');
+    } else if (typeof require === 'function') {
+        fs = require('fs');
+        esprima = require('esprima');
+    } else if (typeof load === 'function') {
+        try {
+            load('esprima.js');
+        } catch (e) {
+            load('../esprima.js');
+        }
+    }
+}
+
+// Shims to Node.js objects when running under PhantomJS 1.7+.
+if (typeof phantom === 'object') {
+    fs.readFileSync = fs.read;
+    process = {
+        argv: [].slice.call(system.args),
+        exit: phantom.exit
+    };
+    process.argv.unshift('phantomjs');
+}
+
+// Shims to Node.js objects when running under Rhino.
+if (typeof console === 'undefined' && typeof process === 'undefined') {
+    console = { log: print };
+    fs = { readFileSync: readFile };
+    process = { argv: arguments, exit: quit };
+    process.argv.unshift('esvalidate.js');
+    process.argv.unshift('rhino');
+}
+
+function showUsage() {
+    console.log('Usage:');
+    console.log('   esvalidate [options] file.js');
+    console.log();
+    console.log('Available options:');
+    console.log();
+    console.log('  --format=type  Set the report format, plain (default) or junit');
+    console.log('  -v, --version  Print program version');
+    console.log();
+    process.exit(1);
+}
+
+if (process.argv.length <= 2) {
+    showUsage();
+}
+
+options = {
+    format: 'plain'
+};
+
+fnames = [];
+
+process.argv.splice(2).forEach(function (entry) {
+
+    if (entry === '-h' || entry === '--help') {
+        showUsage();
+    } else if (entry === '-v' || entry === '--version') {
+        console.log('ECMAScript Validator (using Esprima version', esprima.version, ')');
+        console.log();
+        process.exit(0);
+    } else if (entry.slice(0, 9) === '--format=') {
+        options.format = entry.slice(9);
+        if (options.format !== 'plain' && options.format !== 'junit') {
+            console.log('Error: unknown report format ' + options.format + '.');
+            process.exit(1);
+        }
+    } else if (entry.slice(0, 2) === '--') {
+        console.log('Error: unknown option ' + entry + '.');
+        process.exit(1);
+    } else {
+        fnames.push(entry);
+    }
+});
+
+if (fnames.length === 0) {
+    console.log('Error: no input file.');
+    process.exit(1);
+}
+
+if (options.format === 'junit') {
+    console.log('<?xml version="1.0" encoding="UTF-8"?>');
+    console.log('<testsuites>');
+}
+
+count = 0;
+fnames.forEach(function (fname) {
+    var content, timestamp, syntax, name;
+    try {
+        content = fs.readFileSync(fname, 'utf-8');
+
+        if (content[0] === '#' && content[1] === '!') {
+            content = '//' + content.substr(2, content.length);
+        }
+
+        timestamp = Date.now();
+        syntax = esprima.parse(content, { tolerant: true });
+
+        if (options.format === 'junit') {
+
+            name = fname;
+            if (name.lastIndexOf('/') >= 0) {
+                name = name.slice(name.lastIndexOf('/') + 1);
+            }
+
+            console.log('<testsuite name="' + fname + '" errors="0" ' +
+                ' failures="' + syntax.errors.length + '" ' +
+                ' tests="' + syntax.errors.length + '" ' +
+                ' time="' + Math.round((Date.now() - timestamp) / 1000) +
+                '">');
+
+            syntax.errors.forEach(function (error) {
+                var msg = error.message;
+                msg = msg.replace(/^Line\ [0-9]*\:\ /, '');
+                console.log('  <testcase name="Line ' + error.lineNumber + ': ' + msg + '" ' +
+                    ' time="0">');
+                console.log('    <error type="SyntaxError" message="' + error.message + '">' +
+                    error.message + '(' + name + ':' + error.lineNumber + ')' +
+                    '</error>');
+                console.log('  </testcase>');
+            });
+
+            console.log('</testsuite>');
+
+        } else if (options.format === 'plain') {
+
+            syntax.errors.forEach(function (error) {
+                var msg = error.message;
+                msg = msg.replace(/^Line\ [0-9]*\:\ /, '');
+                msg = fname + ':' + error.lineNumber + ': ' + msg;
+                console.log(msg);
+                ++count;
+            });
+
+        }
+    } catch (e) {
+        ++count;
+        if (options.format === 'junit') {
+            console.log('<testsuite name="' + fname + '" errors="1" failures="0" tests="1" ' +
+                ' time="' + Math.round((Date.now() - timestamp) / 1000) + '">');
+            console.log(' <testcase name="' + e.message + '" ' + ' time="0">');
+            console.log(' <error type="ParseError" message="' + e.message + '">' +
+                e.message + '(' + fname + ((e.lineNumber) ? ':' + e.lineNumber : '') +
+                ')</error>');
+            console.log(' </testcase>');
+            console.log('</testsuite>');
+        } else {
+            console.log('Error: ' + e.message);
+        }
+    }
+});
+
+if (options.format === 'junit') {
+    console.log('</testsuites>');
+}
+
+if (count > 0) {
+    process.exit(1);
+}
+
+if (count === 0 && typeof phantom === 'object') {
+    process.exit(0);
+}
diff --git a/tools/doc/node_modules/esprima/esprima.js b/tools/doc/node_modules/esprima/esprima.js
new file mode 100644
index 00000000000000..654e5fd0ddb318
--- /dev/null
+++ b/tools/doc/node_modules/esprima/esprima.js
@@ -0,0 +1,5739 @@
+/*
+  Copyright (c) jQuery Foundation, Inc. and Contributors, 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.
+
+  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.
+*/
+
+(function (root, factory) {
+    'use strict';
+
+    // Universal Module Definition (UMD) to support AMD, CommonJS/Node.js,
+    // Rhino, and plain browser loading.
+
+    /* istanbul ignore next */
+    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,
+        PlaceHolders,
+        Messages,
+        Regex,
+        source,
+        strict,
+        index,
+        lineNumber,
+        lineStart,
+        hasLineTerminator,
+        lastIndex,
+        lastLineNumber,
+        lastLineStart,
+        startIndex,
+        startLineNumber,
+        startLineStart,
+        scanning,
+        length,
+        lookahead,
+        state,
+        extra,
+        isBindingElement,
+        isAssignmentTarget,
+        firstCoverInitializedNameError;
+
+    Token = {
+        BooleanLiteral: 1,
+        EOF: 2,
+        Identifier: 3,
+        Keyword: 4,
+        NullLiteral: 5,
+        NumericLiteral: 6,
+        Punctuator: 7,
+        StringLiteral: 8,
+        RegularExpression: 9,
+        Template: 10
+    };
+
+    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.RegularExpression] = 'RegularExpression';
+    TokenName[Token.Template] = 'Template';
+
+    // 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 = {
+        AssignmentExpression: 'AssignmentExpression',
+        AssignmentPattern: 'AssignmentPattern',
+        ArrayExpression: 'ArrayExpression',
+        ArrayPattern: 'ArrayPattern',
+        ArrowFunctionExpression: 'ArrowFunctionExpression',
+        BlockStatement: 'BlockStatement',
+        BinaryExpression: 'BinaryExpression',
+        BreakStatement: 'BreakStatement',
+        CallExpression: 'CallExpression',
+        CatchClause: 'CatchClause',
+        ClassBody: 'ClassBody',
+        ClassDeclaration: 'ClassDeclaration',
+        ClassExpression: 'ClassExpression',
+        ConditionalExpression: 'ConditionalExpression',
+        ContinueStatement: 'ContinueStatement',
+        DoWhileStatement: 'DoWhileStatement',
+        DebuggerStatement: 'DebuggerStatement',
+        EmptyStatement: 'EmptyStatement',
+        ExportAllDeclaration: 'ExportAllDeclaration',
+        ExportDefaultDeclaration: 'ExportDefaultDeclaration',
+        ExportNamedDeclaration: 'ExportNamedDeclaration',
+        ExportSpecifier: 'ExportSpecifier',
+        ExpressionStatement: 'ExpressionStatement',
+        ForStatement: 'ForStatement',
+        ForOfStatement: 'ForOfStatement',
+        ForInStatement: 'ForInStatement',
+        FunctionDeclaration: 'FunctionDeclaration',
+        FunctionExpression: 'FunctionExpression',
+        Identifier: 'Identifier',
+        IfStatement: 'IfStatement',
+        ImportDeclaration: 'ImportDeclaration',
+        ImportDefaultSpecifier: 'ImportDefaultSpecifier',
+        ImportNamespaceSpecifier: 'ImportNamespaceSpecifier',
+        ImportSpecifier: 'ImportSpecifier',
+        Literal: 'Literal',
+        LabeledStatement: 'LabeledStatement',
+        LogicalExpression: 'LogicalExpression',
+        MemberExpression: 'MemberExpression',
+        MetaProperty: 'MetaProperty',
+        MethodDefinition: 'MethodDefinition',
+        NewExpression: 'NewExpression',
+        ObjectExpression: 'ObjectExpression',
+        ObjectPattern: 'ObjectPattern',
+        Program: 'Program',
+        Property: 'Property',
+        RestElement: 'RestElement',
+        ReturnStatement: 'ReturnStatement',
+        SequenceExpression: 'SequenceExpression',
+        SpreadElement: 'SpreadElement',
+        Super: 'Super',
+        SwitchCase: 'SwitchCase',
+        SwitchStatement: 'SwitchStatement',
+        TaggedTemplateExpression: 'TaggedTemplateExpression',
+        TemplateElement: 'TemplateElement',
+        TemplateLiteral: 'TemplateLiteral',
+        ThisExpression: 'ThisExpression',
+        ThrowStatement: 'ThrowStatement',
+        TryStatement: 'TryStatement',
+        UnaryExpression: 'UnaryExpression',
+        UpdateExpression: 'UpdateExpression',
+        VariableDeclaration: 'VariableDeclaration',
+        VariableDeclarator: 'VariableDeclarator',
+        WhileStatement: 'WhileStatement',
+        WithStatement: 'WithStatement',
+        YieldExpression: 'YieldExpression'
+    };
+
+    PlaceHolders = {
+        ArrowParameterPlaceHolder: 'ArrowParameterPlaceHolder'
+    };
+
+    // 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',
+        InvalidLHSInForIn: 'Invalid left-hand side in for-in',
+        InvalidLHSInForLoop: 'Invalid left-hand side in for-loop',
+        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',
+        IllegalReturn: 'Illegal return statement',
+        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',
+        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.',
+        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',
+        TemplateOctalLiteral: 'Octal literals are not allowed in template strings.',
+        ParameterAfterRestParameter: 'Rest parameter must be last formal parameter',
+        DefaultRestParameter: 'Unexpected token =',
+        ObjectPatternAsRestParameter: 'Unexpected token {',
+        DuplicateProtoProperty: 'Duplicate __proto__ fields are not allowed in object literals',
+        ConstructorSpecialMethod: 'Class constructor may not be an accessor',
+        DuplicateConstructor: 'A class may only have one constructor',
+        StaticPrototype: 'Classes may not have static property named prototype',
+        MissingFromClause: 'Unexpected token',
+        NoAsAfterImportNamespace: 'Unexpected token',
+        InvalidModuleSpecifier: 'Unexpected token',
+        IllegalImportDeclaration: 'Unexpected token',
+        IllegalExportDeclaration: 'Unexpected token',
+        DuplicateBinding: 'Duplicate binding %0'
+    };
+
+    // See also tools/generate-unicode-regex.js.
+    Regex = {
+        // ECMAScript 6/Unicode v7.0.0 NonAsciiIdentifierStart:
+        NonAsciiIdentifierStart: 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+
+        // ECMAScript 6/Unicode v7.0.0 NonAsciiIdentifierPart:
+        NonAsciiIdentifierPart: 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uFFC7\uFFCA-\uFFCF\uFFD2-\uFFD7\uFFDA-\uFFDC]|\uD800[\uDC00-\uDC0B\uDC0D-\uDC26\uDC28-\uDC3A\uDC3C\uDC3D\uDC3F-\uDC4D\uDC50-\uDC5D\uDC80-\uDCFA\uDD40-\uDD74\uDDFD\uDE80-\uDE9C\uDEA0-\uDED0\uDEE0\uDF00-\uDF1F\uDF30-\uDF4A\uDF50-\uDF7A\uDF80-\uDF9D\uDFA0-\uDFC3\uDFC8-\uDFCF\uDFD1-\uDFD5]|\uD801[\uDC00-\uDC9D\uDCA0-\uDCA9\uDD00-\uDD27\uDD30-\uDD63\uDE00-\uDF36\uDF40-\uDF55\uDF60-\uDF67]|\uD802[\uDC00-\uDC05\uDC08\uDC0A-\uDC35\uDC37\uDC38\uDC3C\uDC3F-\uDC55\uDC60-\uDC76\uDC80-\uDC9E\uDD00-\uDD15\uDD20-\uDD39\uDD80-\uDDB7\uDDBE\uDDBF\uDE00-\uDE03\uDE05\uDE06\uDE0C-\uDE13\uDE15-\uDE17\uDE19-\uDE33\uDE38-\uDE3A\uDE3F\uDE60-\uDE7C\uDE80-\uDE9C\uDEC0-\uDEC7\uDEC9-\uDEE6\uDF00-\uDF35\uDF40-\uDF55\uDF60-\uDF72\uDF80-\uDF91]|\uD803[\uDC00-\uDC48]|\uD804[\uDC00-\uDC46\uDC66-\uDC6F\uDC7F-\uDCBA\uDCD0-\uDCE8\uDCF0-\uDCF9\uDD00-\uDD34\uDD36-\uDD3F\uDD50-\uDD73\uDD76\uDD80-\uDDC4\uDDD0-\uDDDA\uDE00-\uDE11\uDE13-\uDE37\uDEB0-\uDEEA\uDEF0-\uDEF9\uDF01-\uDF03\uDF05-\uDF0C\uDF0F\uDF10\uDF13-\uDF28\uDF2A-\uDF30\uDF32\uDF33\uDF35-\uDF39\uDF3C-\uDF44\uDF47\uDF48\uDF4B-\uDF4D\uDF57\uDF5D-\uDF63\uDF66-\uDF6C\uDF70-\uDF74]|\uD805[\uDC80-\uDCC5\uDCC7\uDCD0-\uDCD9\uDD80-\uDDB5\uDDB8-\uDDC0\uDE00-\uDE40\uDE44\uDE50-\uDE59\uDE80-\uDEB7\uDEC0-\uDEC9]|\uD806[\uDCA0-\uDCE9\uDCFF\uDEC0-\uDEF8]|\uD808[\uDC00-\uDF98]|\uD809[\uDC00-\uDC6E]|[\uD80C\uD840-\uD868\uD86A-\uD86C][\uDC00-\uDFFF]|\uD80D[\uDC00-\uDC2E]|\uD81A[\uDC00-\uDE38\uDE40-\uDE5E\uDE60-\uDE69\uDED0-\uDEED\uDEF0-\uDEF4\uDF00-\uDF36\uDF40-\uDF43\uDF50-\uDF59\uDF63-\uDF77\uDF7D-\uDF8F]|\uD81B[\uDF00-\uDF44\uDF50-\uDF7E\uDF8F-\uDF9F]|\uD82C[\uDC00\uDC01]|\uD82F[\uDC00-\uDC6A\uDC70-\uDC7C\uDC80-\uDC88\uDC90-\uDC99\uDC9D\uDC9E]|\uD834[\uDD65-\uDD69\uDD6D-\uDD72\uDD7B-\uDD82\uDD85-\uDD8B\uDDAA-\uDDAD\uDE42-\uDE44]|\uD835[\uDC00-\uDC54\uDC56-\uDC9C\uDC9E\uDC9F\uDCA2\uDCA5\uDCA6\uDCA9-\uDCAC\uDCAE-\uDCB9\uDCBB\uDCBD-\uDCC3\uDCC5-\uDD05\uDD07-\uDD0A\uDD0D-\uDD14\uDD16-\uDD1C\uDD1E-\uDD39\uDD3B-\uDD3E\uDD40-\uDD44\uDD46\uDD4A-\uDD50\uDD52-\uDEA5\uDEA8-\uDEC0\uDEC2-\uDEDA\uDEDC-\uDEFA\uDEFC-\uDF14\uDF16-\uDF34\uDF36-\uDF4E\uDF50-\uDF6E\uDF70-\uDF88\uDF8A-\uDFA8\uDFAA-\uDFC2\uDFC4-\uDFCB\uDFCE-\uDFFF]|\uD83A[\uDC00-\uDCC4\uDCD0-\uDCD6]|\uD83B[\uDE00-\uDE03\uDE05-\uDE1F\uDE21\uDE22\uDE24\uDE27\uDE29-\uDE32\uDE34-\uDE37\uDE39\uDE3B\uDE42\uDE47\uDE49\uDE4B\uDE4D-\uDE4F\uDE51\uDE52\uDE54\uDE57\uDE59\uDE5B\uDE5D\uDE5F\uDE61\uDE62\uDE64\uDE67-\uDE6A\uDE6C-\uDE72\uDE74-\uDE77\uDE79-\uDE7C\uDE7E\uDE80-\uDE89\uDE8B-\uDE9B\uDEA1-\uDEA3\uDEA5-\uDEA9\uDEAB-\uDEBB]|\uD869[\uDC00-\uDED6\uDF00-\uDFFF]|\uD86D[\uDC00-\uDF34\uDF40-\uDFFF]|\uD86E[\uDC00-\uDC1D]|\uD87E[\uDC00-\uDE1D]|\uDB40[\uDD00-\uDDEF]/
+    };
+
+    // 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) {
+        /* istanbul ignore if */
+        if (!condition) {
+            throw new Error('ASSERT: ' + message);
+        }
+    }
+
+    function isDecimalDigit(ch) {
+        return (ch >= 0x30 && ch <= 0x39);   // 0..9
+    }
+
+    function isHexDigit(ch) {
+        return '0123456789abcdefABCDEF'.indexOf(ch) >= 0;
+    }
+
+    function isOctalDigit(ch) {
+        return '01234567'.indexOf(ch) >= 0;
+    }
+
+    function octalToDecimal(ch) {
+        // \0 is not octal escape sequence
+        var octal = (ch !== '0'), code = '01234567'.indexOf(ch);
+
+        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++]);
+            }
+        }
+
+        return {
+            code: code,
+            octal: octal
+        };
+    }
+
+    // ECMA-262 11.2 White Space
+
+    function isWhiteSpace(ch) {
+        return (ch === 0x20) || (ch === 0x09) || (ch === 0x0B) || (ch === 0x0C) || (ch === 0xA0) ||
+            (ch >= 0x1680 && [0x1680, 0x180E, 0x2000, 0x2001, 0x2002, 0x2003, 0x2004, 0x2005, 0x2006, 0x2007, 0x2008, 0x2009, 0x200A, 0x202F, 0x205F, 0x3000, 0xFEFF].indexOf(ch) >= 0);
+    }
+
+    // ECMA-262 11.3 Line Terminators
+
+    function isLineTerminator(ch) {
+        return (ch === 0x0A) || (ch === 0x0D) || (ch === 0x2028) || (ch === 0x2029);
+    }
+
+    // ECMA-262 11.6 Identifier Names and Identifiers
+
+    function fromCodePoint(cp) {
+        return (cp < 0x10000) ? String.fromCharCode(cp) :
+            String.fromCharCode(0xD800 + ((cp - 0x10000) >> 10)) +
+            String.fromCharCode(0xDC00 + ((cp - 0x10000) & 1023));
+    }
+
+    function isIdentifierStart(ch) {
+        return (ch === 0x24) || (ch === 0x5F) ||  // $ (dollar) and _ (underscore)
+            (ch >= 0x41 && ch <= 0x5A) ||         // A..Z
+            (ch >= 0x61 && ch <= 0x7A) ||         // a..z
+            (ch === 0x5C) ||                      // \ (backslash)
+            ((ch >= 0x80) && Regex.NonAsciiIdentifierStart.test(fromCodePoint(ch)));
+    }
+
+    function isIdentifierPart(ch) {
+        return (ch === 0x24) || (ch === 0x5F) ||  // $ (dollar) and _ (underscore)
+            (ch >= 0x41 && ch <= 0x5A) ||         // A..Z
+            (ch >= 0x61 && ch <= 0x7A) ||         // a..z
+            (ch >= 0x30 && ch <= 0x39) ||         // 0..9
+            (ch === 0x5C) ||                      // \ (backslash)
+            ((ch >= 0x80) && Regex.NonAsciiIdentifierPart.test(fromCodePoint(ch)));
+    }
+
+    // ECMA-262 11.6.2.2 Future Reserved Words
+
+    function isFutureReservedWord(id) {
+        switch (id) {
+        case 'enum':
+        case 'export':
+        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';
+    }
+
+    // ECMA-262 11.6.2.1 Keywords
+
+    function isKeyword(id) {
+        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 === 'yield') ||
+                (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;
+        }
+    }
+
+    // ECMA-262 11.4 Comments
+
+    function addComment(type, value, start, end, loc) {
+        var comment;
+
+        assert(typeof start === 'number', 'Comment must have valid position');
+
+        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);
+        if (extra.attachComment) {
+            extra.leadingComments.push(comment);
+            extra.trailingComments.push(comment);
+        }
+        if (extra.tokenize) {
+            comment.type = comment.type + 'Comment';
+            if (extra.delegate) {
+                comment = extra.delegate(comment);
+            }
+            extra.tokens.push(comment);
+        }
+    }
+
+    function skipSingleLineComment(offset) {
+        var start, loc, ch, comment;
+
+        start = index - offset;
+        loc = {
+            start: {
+                line: lineNumber,
+                column: index - lineStart - offset
+            }
+        };
+
+        while (index < length) {
+            ch = source.charCodeAt(index);
+            ++index;
+            if (isLineTerminator(ch)) {
+                hasLineTerminator = true;
+                if (extra.comments) {
+                    comment = source.slice(start + offset, index - 1);
+                    loc.end = {
+                        line: lineNumber,
+                        column: index - lineStart - 1
+                    };
+                    addComment('Line', comment, start, index - 1, loc);
+                }
+                if (ch === 13 && source.charCodeAt(index) === 10) {
+                    ++index;
+                }
+                ++lineNumber;
+                lineStart = index;
+                return;
+            }
+        }
+
+        if (extra.comments) {
+            comment = source.slice(start + offset, index);
+            loc.end = {
+                line: lineNumber,
+                column: index - lineStart
+            };
+            addComment('Line', comment, start, index, loc);
+        }
+    }
+
+    function skipMultiLineComment() {
+        var start, loc, ch, comment;
+
+        if (extra.comments) {
+            start = index - 2;
+            loc = {
+                start: {
+                    line: lineNumber,
+                    column: index - lineStart - 2
+                }
+            };
+        }
+
+        while (index < length) {
+            ch = source.charCodeAt(index);
+            if (isLineTerminator(ch)) {
+                if (ch === 0x0D && source.charCodeAt(index + 1) === 0x0A) {
+                    ++index;
+                }
+                hasLineTerminator = true;
+                ++lineNumber;
+                ++index;
+                lineStart = index;
+            } else if (ch === 0x2A) {
+                // Block comment ends with '*/'.
+                if (source.charCodeAt(index + 1) === 0x2F) {
+                    ++index;
+                    ++index;
+                    if (extra.comments) {
+                        comment = source.slice(start + 2, index - 2);
+                        loc.end = {
+                            line: lineNumber,
+                            column: index - lineStart
+                        };
+                        addComment('Block', comment, start, index, loc);
+                    }
+                    return;
+                }
+                ++index;
+            } else {
+                ++index;
+            }
+        }
+
+        // Ran off the end of the file - the whole thing is a comment
+        if (extra.comments) {
+            loc.end = {
+                line: lineNumber,
+                column: index - lineStart
+            };
+            comment = source.slice(start + 2, index);
+            addComment('Block', comment, start, index, loc);
+        }
+        tolerateUnexpectedToken();
+    }
+
+    function skipComment() {
+        var ch, start;
+        hasLineTerminator = false;
+
+        start = (index === 0);
+        while (index < length) {
+            ch = source.charCodeAt(index);
+
+            if (isWhiteSpace(ch)) {
+                ++index;
+            } else if (isLineTerminator(ch)) {
+                hasLineTerminator = true;
+                ++index;
+                if (ch === 0x0D && source.charCodeAt(index) === 0x0A) {
+                    ++index;
+                }
+                ++lineNumber;
+                lineStart = index;
+                start = true;
+            } else if (ch === 0x2F) { // U+002F is '/'
+                ch = source.charCodeAt(index + 1);
+                if (ch === 0x2F) {
+                    ++index;
+                    ++index;
+                    skipSingleLineComment(2);
+                    start = true;
+                } else if (ch === 0x2A) {  // U+002A is '*'
+                    ++index;
+                    ++index;
+                    skipMultiLineComment();
+                } else {
+                    break;
+                }
+            } else if (start && ch === 0x2D) { // U+002D is '-'
+                // U+003E is '>'
+                if ((source.charCodeAt(index + 1) === 0x2D) && (source.charCodeAt(index + 2) === 0x3E)) {
+                    // '-->' is a single-line comment
+                    index += 3;
+                    skipSingleLineComment(3);
+                } else {
+                    break;
+                }
+            } else if (ch === 0x3C) { // U+003C is '<'
+                if (source.slice(index + 1, index + 4) === '!--') {
+                    ++index; // `<`
+                    ++index; // `!`
+                    ++index; // `-`
+                    ++index; // `-`
+                    skipSingleLineComment(4);
+                } else {
+                    break;
+                }
+            } 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;
+
+        ch = source[index];
+        code = 0;
+
+        // At least, one hex digit is required.
+        if (ch === '}') {
+            throwUnexpectedToken();
+        }
+
+        while (index < length) {
+            ch = source[index++];
+            if (!isHexDigit(ch)) {
+                break;
+            }
+            code = code * 16 + '0123456789abcdef'.indexOf(ch.toLowerCase());
+        }
+
+        if (code > 0x10FFFF || ch !== '}') {
+            throwUnexpectedToken();
+        }
+
+        return fromCodePoint(code);
+    }
+
+    function codePointAt(i) {
+        var cp, first, second;
+
+        cp = source.charCodeAt(i);
+        if (cp >= 0xD800 && cp <= 0xDBFF) {
+            second = source.charCodeAt(i + 1);
+            if (second >= 0xDC00 && second <= 0xDFFF) {
+                first = cp;
+                cp = (first - 0xD800) * 0x400 + second - 0xDC00 + 0x10000;
+            }
+        }
+
+        return cp;
+    }
+
+    function getComplexIdentifier() {
+        var cp, ch, id;
+
+        cp = codePointAt(index);
+        id = fromCodePoint(cp);
+        index += id.length;
+
+        // '\u' (U+005C, U+0075) denotes an escaped character.
+        if (cp === 0x5C) {
+            if (source.charCodeAt(index) !== 0x75) {
+                throwUnexpectedToken();
+            }
+            ++index;
+            if (source[index] === '{') {
+                ++index;
+                ch = scanUnicodeCodePointEscape();
+            } else {
+                ch = scanHexEscape('u');
+                cp = ch.charCodeAt(0);
+                if (!ch || ch === '\\' || !isIdentifierStart(cp)) {
+                    throwUnexpectedToken();
+                }
+            }
+            id = ch;
+        }
+
+        while (index < length) {
+            cp = codePointAt(index);
+            if (!isIdentifierPart(cp)) {
+                break;
+            }
+            ch = fromCodePoint(cp);
+            id += ch;
+            index += ch.length;
+
+            // '\u' (U+005C, U+0075) denotes an escaped character.
+            if (cp === 0x5C) {
+                id = id.substr(0, id.length - 1);
+                if (source.charCodeAt(index) !== 0x75) {
+                    throwUnexpectedToken();
+                }
+                ++index;
+                if (source[index] === '{') {
+                    ++index;
+                    ch = scanUnicodeCodePointEscape();
+                } else {
+                    ch = scanHexEscape('u');
+                    cp = ch.charCodeAt(0);
+                    if (!ch || ch === '\\' || !isIdentifierPart(cp)) {
+                        throwUnexpectedToken();
+                    }
+                }
+                id += ch;
+            }
+        }
+
+        return id;
+    }
+
+    function getIdentifier() {
+        var start, ch;
+
+        start = index++;
+        while (index < length) {
+            ch = source.charCodeAt(index);
+            if (ch === 0x5C) {
+                // Blackslash (U+005C) marks Unicode escape sequence.
+                index = start;
+                return getComplexIdentifier();
+            } else if (ch >= 0xD800 && ch < 0xDFFF) {
+                // Need to handle surrogate pairs.
+                index = start;
+                return getComplexIdentifier();
+            }
+            if (isIdentifierPart(ch)) {
+                ++index;
+            } else {
+                break;
+            }
+        }
+
+        return source.slice(start, index);
+    }
+
+    function scanIdentifier() {
+        var start, id, type;
+
+        start = index;
+
+        // Backslash (U+005C) starts an escaped character.
+        id = (source.charCodeAt(index) === 0x5C) ? getComplexIdentifier() : 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,
+            start: start,
+            end: index
+        };
+    }
+
+
+    // ECMA-262 11.7 Punctuators
+
+    function scanPunctuator() {
+        var token, str;
+
+        token = {
+            type: Token.Punctuator,
+            value: '',
+            lineNumber: lineNumber,
+            lineStart: lineStart,
+            start: index,
+            end: index
+        };
+
+        // Check for most common single-character punctuators.
+        str = source[index];
+        switch (str) {
+
+        case '(':
+            if (extra.tokenize) {
+                extra.openParenToken = extra.tokenValues.length;
+            }
+            ++index;
+            break;
+
+        case '{':
+            if (extra.tokenize) {
+                extra.openCurlyToken = extra.tokenValues.length;
+            }
+            state.curlyStack.push('{');
+            ++index;
+            break;
+
+        case '.':
+            ++index;
+            if (source[index] === '.' && source[index + 1] === '.') {
+                // Spread operator: ...
+                index += 2;
+                str = '...';
+            }
+            break;
+
+        case '}':
+            ++index;
+            state.curlyStack.pop();
+            break;
+        case ')':
+        case ';':
+        case ',':
+        case '[':
+        case ']':
+        case ':':
+        case '?':
+        case '~':
+            ++index;
+            break;
+
+        default:
+            // 4-character punctuator.
+            str = source.substr(index, 4);
+            if (str === '>>>=') {
+                index += 4;
+            } else {
+
+                // 3-character punctuators.
+                str = str.substr(0, 3);
+                if (str === '===' || str === '!==' || str === '>>>' ||
+                    str === '<<=' || str === '>>=') {
+                    index += 3;
+                } else {
+
+                    // 2-character punctuators.
+                    str = str.substr(0, 2);
+                    if (str === '&&' || str === '||' || str === '==' || str === '!=' ||
+                        str === '+=' || str === '-=' || str === '*=' || str === '/=' ||
+                        str === '++' || str === '--' || str === '<<' || str === '>>' ||
+                        str === '&=' || str === '|=' || str === '^=' || str === '%=' ||
+                        str === '<=' || str === '>=' || str === '=>') {
+                        index += 2;
+                    } else {
+
+                        // 1-character punctuators.
+                        str = source[index];
+                        if ('<>=!+-*%&|^/'.indexOf(str) >= 0) {
+                            ++index;
+                        }
+                    }
+                }
+            }
+        }
+
+        if (index === token.start) {
+            throwUnexpectedToken();
+        }
+
+        token.end = index;
+        token.value = str;
+        return token;
+    }
+
+    // ECMA-262 11.8.3 Numeric Literals
+
+    function scanHexLiteral(start) {
+        var number = '';
+
+        while (index < length) {
+            if (!isHexDigit(source[index])) {
+                break;
+            }
+            number += source[index++];
+        }
+
+        if (number.length === 0) {
+            throwUnexpectedToken();
+        }
+
+        if (isIdentifierStart(source.charCodeAt(index))) {
+            throwUnexpectedToken();
+        }
+
+        return {
+            type: Token.NumericLiteral,
+            value: parseInt('0x' + number, 16),
+            lineNumber: lineNumber,
+            lineStart: lineStart,
+            start: start,
+            end: index
+        };
+    }
+
+    function scanBinaryLiteral(start) {
+        var ch, number;
+
+        number = '';
+
+        while (index < length) {
+            ch = source[index];
+            if (ch !== '0' && ch !== '1') {
+                break;
+            }
+            number += source[index++];
+        }
+
+        if (number.length === 0) {
+            // only 0b or 0B
+            throwUnexpectedToken();
+        }
+
+        if (index < length) {
+            ch = source.charCodeAt(index);
+            /* istanbul ignore else */
+            if (isIdentifierStart(ch) || isDecimalDigit(ch)) {
+                throwUnexpectedToken();
+            }
+        }
+
+        return {
+            type: Token.NumericLiteral,
+            value: parseInt(number, 2),
+            lineNumber: lineNumber,
+            lineStart: lineStart,
+            start: start,
+            end: 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
+            throwUnexpectedToken();
+        }
+
+        if (isIdentifierStart(source.charCodeAt(index)) || isDecimalDigit(source.charCodeAt(index))) {
+            throwUnexpectedToken();
+        }
+
+        return {
+            type: Token.NumericLiteral,
+            value: parseInt(number, 8),
+            octal: octal,
+            lineNumber: lineNumber,
+            lineStart: lineStart,
+            start: start,
+            end: index
+        };
+    }
+
+    function isImplicitOctalLiteral() {
+        var i, ch;
+
+        // Implicit octal, unless there is a non-octal digit.
+        // (Annex B.1.1 on Numeric Literals)
+        for (i = index + 1; i < length; ++i) {
+            ch = source[i];
+            if (ch === '8' || ch === '9') {
+                return false;
+            }
+            if (!isOctalDigit(ch)) {
+                return true;
+            }
+        }
+
+        return true;
+    }
+
+    function scanNumericLiteral() {
+        var number, start, ch;
+
+        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;
+                    return scanBinaryLiteral(start);
+                }
+                if (ch === 'o' || ch === 'O') {
+                    return scanOctalLiteral(ch, start);
+                }
+
+                if (isOctalDigit(ch)) {
+                    if (isImplicitOctalLiteral()) {
+                        return scanOctalLiteral(ch, start);
+                    }
+                }
+            }
+
+            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 {
+                throwUnexpectedToken();
+            }
+        }
+
+        if (isIdentifierStart(source.charCodeAt(index))) {
+            throwUnexpectedToken();
+        }
+
+        return {
+            type: Token.NumericLiteral,
+            value: parseFloat(number),
+            lineNumber: lineNumber,
+            lineStart: lineStart,
+            start: start,
+            end: index
+        };
+    }
+
+    // ECMA-262 11.8.4 String Literals
+
+    function scanStringLiteral() {
+        var str = '', quote, start, ch, unescaped, octToDec, 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 'u':
+                    case 'x':
+                        if (source[index] === '{') {
+                            ++index;
+                            str += scanUnicodeCodePointEscape();
+                        } else {
+                            unescaped = scanHexEscape(ch);
+                            if (!unescaped) {
+                                throw throwUnexpectedToken();
+                            }
+                            str += unescaped;
+                        }
+                        break;
+                    case 'n':
+                        str += '\n';
+                        break;
+                    case 'r':
+                        str += '\r';
+                        break;
+                    case 't':
+                        str += '\t';
+                        break;
+                    case 'b':
+                        str += '\b';
+                        break;
+                    case 'f':
+                        str += '\f';
+                        break;
+                    case 'v':
+                        str += '\x0B';
+                        break;
+                    case '8':
+                    case '9':
+                        str += ch;
+                        tolerateUnexpectedToken();
+                        break;
+
+                    default:
+                        if (isOctalDigit(ch)) {
+                            octToDec = octalToDecimal(ch);
+
+                            octal = octToDec.octal || octal;
+                            str += String.fromCharCode(octToDec.code);
+                        } else {
+                            str += ch;
+                        }
+                        break;
+                    }
+                } else {
+                    ++lineNumber;
+                    if (ch === '\r' && source[index] === '\n') {
+                        ++index;
+                    }
+                    lineStart = index;
+                }
+            } else if (isLineTerminator(ch.charCodeAt(0))) {
+                break;
+            } else {
+                str += ch;
+            }
+        }
+
+        if (quote !== '') {
+            index = start;
+            throwUnexpectedToken();
+        }
+
+        return {
+            type: Token.StringLiteral,
+            value: str,
+            octal: octal,
+            lineNumber: startLineNumber,
+            lineStart: startLineStart,
+            start: start,
+            end: index
+        };
+    }
+
+    // ECMA-262 11.8.6 Template Literal Lexical Components
+
+    function scanTemplate() {
+        var cooked = '', ch, start, rawOffset, terminated, head, tail, restore, unescaped;
+
+        terminated = false;
+        tail = false;
+        start = index;
+        head = (source[index] === '`');
+        rawOffset = 2;
+
+        ++index;
+
+        while (index < length) {
+            ch = source[index++];
+            if (ch === '`') {
+                rawOffset = 1;
+                tail = true;
+                terminated = true;
+                break;
+            } else if (ch === '$') {
+                if (source[index] === '{') {
+                    state.curlyStack.push('${');
+                    ++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 (ch === '0') {
+                            if (isDecimalDigit(source.charCodeAt(index))) {
+                                // Illegal: \01 \02 and so on
+                                throwError(Messages.TemplateOctalLiteral);
+                            }
+                            cooked += '\0';
+                        } else if (isOctalDigit(ch)) {
+                            // Illegal: \1 \2
+                            throwError(Messages.TemplateOctalLiteral);
+                        } else {
+                            cooked += ch;
+                        }
+                        break;
+                    }
+                } else {
+                    ++lineNumber;
+                    if (ch === '\r' && source[index] === '\n') {
+                        ++index;
+                    }
+                    lineStart = index;
+                }
+            } else if (isLineTerminator(ch.charCodeAt(0))) {
+                ++lineNumber;
+                if (ch === '\r' && source[index] === '\n') {
+                    ++index;
+                }
+                lineStart = index;
+                cooked += '\n';
+            } else {
+                cooked += ch;
+            }
+        }
+
+        if (!terminated) {
+            throwUnexpectedToken();
+        }
+
+        if (!head) {
+            state.curlyStack.pop();
+        }
+
+        return {
+            type: Token.Template,
+            value: {
+                cooked: cooked,
+                raw: source.slice(start + 1, index - rawOffset)
+            },
+            head: head,
+            tail: tail,
+            lineNumber: lineNumber,
+            lineStart: lineStart,
+            start: start,
+            end: index
+        };
+    }
+
+    // ECMA-262 11.8.5 Regular Expression Literals
+
+    function testRegExp(pattern, flags) {
+        // The BMP character to use as a replacement for astral symbols when
+        // translating an ES6 "u"-flagged pattern to an ES5-compatible
+        // approximation.
+        // Note: replacing with '\uFFFF' enables false positives in unlikely
+        // scenarios. For example, `[\u{1044f}-\u{10440}]` is an invalid
+        // pattern that would not be detected by this substitution.
+        var astralSubstitute = '\uFFFF',
+            tmp = pattern;
+
+        if (flags.indexOf('u') >= 0) {
+            tmp = tmp
+                // Replace every Unicode escape sequence with the equivalent
+                // BMP character or a constant ASCII code point in the case of
+                // astral symbols. (See the above note on `astralSubstitute`
+                // for more information.)
+                .replace(/\\u\{([0-9a-fA-F]+)\}|\\u([a-fA-F0-9]{4})/g, function ($0, $1, $2) {
+                    var codePoint = parseInt($1 || $2, 16);
+                    if (codePoint > 0x10FFFF) {
+                        throwUnexpectedToken(null, Messages.InvalidRegExp);
+                    }
+                    if (codePoint <= 0xFFFF) {
+                        return String.fromCharCode(codePoint);
+                    }
+                    return astralSubstitute;
+                })
+                // Replace each paired surrogate with a single ASCII symbol to
+                // avoid throwing on regular expressions that are only valid in
+                // combination with the "u" flag.
+                .replace(
+                    /[\uD800-\uDBFF][\uDC00-\uDFFF]/g,
+                    astralSubstitute
+                );
+        }
+
+        // First, detect invalid regular expressions.
+        try {
+            RegExp(tmp);
+        } catch (e) {
+            throwUnexpectedToken(null, Messages.InvalidRegExp);
+        }
+
+        // Return a regular expression object for this pattern-flag pair, or
+        // `null` in case the current environment doesn't support the flags it
+        // uses.
+        try {
+            return new RegExp(pattern, flags);
+        } catch (exception) {
+            return null;
+        }
+    }
+
+    function scanRegExpBody() {
+        var ch, str, classMarker, terminated, body;
+
+        ch = source[index];
+        assert(ch === '/', 'Regular expression literal must start with a slash');
+        str = source[index++];
+
+        classMarker = false;
+        terminated = false;
+        while (index < length) {
+            ch = source[index++];
+            str += ch;
+            if (ch === '\\') {
+                ch = source[index++];
+                // ECMA-262 7.8.5
+                if (isLineTerminator(ch.charCodeAt(0))) {
+                    throwUnexpectedToken(null, Messages.UnterminatedRegExp);
+                }
+                str += ch;
+            } else if (isLineTerminator(ch.charCodeAt(0))) {
+                throwUnexpectedToken(null, Messages.UnterminatedRegExp);
+            } else if (classMarker) {
+                if (ch === ']') {
+                    classMarker = false;
+                }
+            } else {
+                if (ch === '/') {
+                    terminated = true;
+                    break;
+                } else if (ch === '[') {
+                    classMarker = true;
+                }
+            }
+        }
+
+        if (!terminated) {
+            throwUnexpectedToken(null, Messages.UnterminatedRegExp);
+        }
+
+        // Exclude leading and trailing slash.
+        body = str.substr(1, str.length - 2);
+        return {
+            value: body,
+            literal: str
+        };
+    }
+
+    function scanRegExpFlags() {
+        var ch, str, flags, restore;
+
+        str = '';
+        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';
+                    }
+                    tolerateUnexpectedToken();
+                } else {
+                    str += '\\';
+                    tolerateUnexpectedToken();
+                }
+            } else {
+                flags += ch;
+                str += ch;
+            }
+        }
+
+        return {
+            value: flags,
+            literal: str
+        };
+    }
+
+    function scanRegExp() {
+        var start, body, flags, value;
+        scanning = true;
+
+        lookahead = null;
+        skipComment();
+        start = index;
+
+        body = scanRegExpBody();
+        flags = scanRegExpFlags();
+        value = testRegExp(body.value, flags.value);
+        scanning = false;
+        if (extra.tokenize) {
+            return {
+                type: Token.RegularExpression,
+                value: value,
+                regex: {
+                    pattern: body.value,
+                    flags: flags.value
+                },
+                lineNumber: lineNumber,
+                lineStart: lineStart,
+                start: start,
+                end: index
+            };
+        }
+
+        return {
+            literal: body.literal + flags.literal,
+            value: value,
+            regex: {
+                pattern: body.value,
+                flags: flags.value
+            },
+            start: start,
+            end: index
+        };
+    }
+
+    function collectRegex() {
+        var pos, loc, regex, token;
+
+        skipComment();
+
+        pos = index;
+        loc = {
+            start: {
+                line: lineNumber,
+                column: index - lineStart
+            }
+        };
+
+        regex = scanRegExp();
+
+        loc.end = {
+            line: lineNumber,
+            column: index - lineStart
+        };
+
+        /* istanbul ignore next */
+        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,
+                regex: regex.regex,
+                range: [pos, index],
+                loc: loc
+            });
+        }
+
+        return regex;
+    }
+
+    function isIdentifierName(token) {
+        return token.type === Token.Identifier ||
+            token.type === Token.Keyword ||
+            token.type === Token.BooleanLiteral ||
+            token.type === Token.NullLiteral;
+    }
+
+    // Using the following algorithm:
+    // https://github.com/mozilla/sweet.js/wiki/design
+
+    function advanceSlash() {
+        var regex, previous, check;
+
+        function testKeyword(value) {
+            return value && (value.length > 1) && (value[0] >= 'a') && (value[0] <= 'z');
+        }
+
+        previous = extra.tokenValues[extra.tokens.length - 1];
+        regex = (previous !== null);
+
+        switch (previous) {
+        case 'this':
+        case ']':
+            regex = false;
+            break;
+
+        case ')':
+            check = extra.tokenValues[extra.openParenToken - 1];
+            regex = (check === 'if' || check === 'while' || check === 'for' || check === 'with');
+            break;
+
+        case '}':
+            // Dividing a function by anything makes little sense,
+            // but we have to check for that.
+            regex = false;
+            if (testKeyword(extra.tokenValues[extra.openCurlyToken - 3])) {
+                // Anonymous function, e.g. function(){} /42
+                check = extra.tokenValues[extra.openCurlyToken - 4];
+                regex = check ? (FnExprTokens.indexOf(check) < 0) : false;
+            } else if (testKeyword(extra.tokenValues[extra.openCurlyToken - 4])) {
+                // Named function, e.g. function f(){} /42/
+                check = extra.tokenValues[extra.openCurlyToken - 5];
+                regex = check ? (FnExprTokens.indexOf(check) < 0) : true;
+            }
+        }
+
+        return regex ? collectRegex() : scanPunctuator();
+    }
+
+    function advance() {
+        var cp, token;
+
+        if (index >= length) {
+            return {
+                type: Token.EOF,
+                lineNumber: lineNumber,
+                lineStart: lineStart,
+                start: index,
+                end: index
+            };
+        }
+
+        cp = source.charCodeAt(index);
+
+        if (isIdentifierStart(cp)) {
+            token = scanIdentifier();
+            if (strict && isStrictModeReservedWord(token.value)) {
+                token.type = Token.Keyword;
+            }
+            return token;
+        }
+
+        // Very common: ( and ) and ;
+        if (cp === 0x28 || cp === 0x29 || cp === 0x3B) {
+            return scanPunctuator();
+        }
+
+        // String literal starts with single quote (U+0027) or double quote (U+0022).
+        if (cp === 0x27 || cp === 0x22) {
+            return scanStringLiteral();
+        }
+
+        // Dot (.) U+002E can also start a floating-point number, hence the need
+        // to check the next character.
+        if (cp === 0x2E) {
+            if (isDecimalDigit(source.charCodeAt(index + 1))) {
+                return scanNumericLiteral();
+            }
+            return scanPunctuator();
+        }
+
+        if (isDecimalDigit(cp)) {
+            return scanNumericLiteral();
+        }
+
+        // Slash (/) U+002F can also start a regex.
+        if (extra.tokenize && cp === 0x2F) {
+            return advanceSlash();
+        }
+
+        // Template literals start with ` (U+0060) for template head
+        // or } (U+007D) for template middle or template tail.
+        if (cp === 0x60 || (cp === 0x7D && state.curlyStack[state.curlyStack.length - 1] === '${')) {
+            return scanTemplate();
+        }
+
+        // Possible identifier start in a surrogate pair.
+        if (cp >= 0xD800 && cp < 0xDFFF) {
+            cp = codePointAt(index);
+            if (isIdentifierStart(cp)) {
+                return scanIdentifier();
+            }
+        }
+
+        return scanPunctuator();
+    }
+
+    function collectToken() {
+        var loc, token, value, entry;
+
+        loc = {
+            start: {
+                line: lineNumber,
+                column: index - lineStart
+            }
+        };
+
+        token = advance();
+        loc.end = {
+            line: lineNumber,
+            column: index - lineStart
+        };
+
+        if (token.type !== Token.EOF) {
+            value = source.slice(token.start, token.end);
+            entry = {
+                type: TokenName[token.type],
+                value: value,
+                range: [token.start, token.end],
+                loc: loc
+            };
+            if (token.regex) {
+                entry.regex = {
+                    pattern: token.regex.pattern,
+                    flags: token.regex.flags
+                };
+            }
+            if (extra.tokenValues) {
+                extra.tokenValues.push((entry.type === 'Punctuator' || entry.type === 'Keyword') ? entry.value : null);
+            }
+            if (extra.tokenize) {
+                if (!extra.range) {
+                    delete entry.range;
+                }
+                if (!extra.loc) {
+                    delete entry.loc;
+                }
+                if (extra.delegate) {
+                    entry = extra.delegate(entry);
+                }
+            }
+            extra.tokens.push(entry);
+        }
+
+        return token;
+    }
+
+    function lex() {
+        var token;
+        scanning = true;
+
+        lastIndex = index;
+        lastLineNumber = lineNumber;
+        lastLineStart = lineStart;
+
+        skipComment();
+
+        token = lookahead;
+
+        startIndex = index;
+        startLineNumber = lineNumber;
+        startLineStart = lineStart;
+
+        lookahead = (typeof extra.tokens !== 'undefined') ? collectToken() : advance();
+        scanning = false;
+        return token;
+    }
+
+    function peek() {
+        scanning = true;
+
+        skipComment();
+
+        lastIndex = index;
+        lastLineNumber = lineNumber;
+        lastLineStart = lineStart;
+
+        startIndex = index;
+        startLineNumber = lineNumber;
+        startLineStart = lineStart;
+
+        lookahead = (typeof extra.tokens !== 'undefined') ? collectToken() : advance();
+        scanning = false;
+    }
+
+    function Position() {
+        this.line = startLineNumber;
+        this.column = startIndex - startLineStart;
+    }
+
+    function SourceLocation() {
+        this.start = new Position();
+        this.end = null;
+    }
+
+    function WrappingSourceLocation(startToken) {
+        this.start = {
+            line: startToken.lineNumber,
+            column: startToken.start - startToken.lineStart
+        };
+        this.end = null;
+    }
+
+    function Node() {
+        if (extra.range) {
+            this.range = [startIndex, 0];
+        }
+        if (extra.loc) {
+            this.loc = new SourceLocation();
+        }
+    }
+
+    function WrappingNode(startToken) {
+        if (extra.range) {
+            this.range = [startToken.start, 0];
+        }
+        if (extra.loc) {
+            this.loc = new WrappingSourceLocation(startToken);
+        }
+    }
+
+    WrappingNode.prototype = Node.prototype = {
+
+        processComment: function () {
+            var lastChild,
+                innerComments,
+                leadingComments,
+                trailingComments,
+                bottomRight = extra.bottomRightStack,
+                i,
+                comment,
+                last = bottomRight[bottomRight.length - 1];
+
+            if (this.type === Syntax.Program) {
+                if (this.body.length > 0) {
+                    return;
+                }
+            }
+            /**
+             * patch innnerComments for properties empty block
+             * `function a() {/** comments **\/}`
+             */
+
+            if (this.type === Syntax.BlockStatement && this.body.length === 0) {
+                innerComments = [];
+                for (i = extra.leadingComments.length - 1; i >= 0; --i) {
+                    comment = extra.leadingComments[i];
+                    if (this.range[1] >= comment.range[1]) {
+                        innerComments.unshift(comment);
+                        extra.leadingComments.splice(i, 1);
+                        extra.trailingComments.splice(i, 1);
+                    }
+                }
+                if (innerComments.length) {
+                    this.innerComments = innerComments;
+                    //bottomRight.push(this);
+                    return;
+                }
+            }
+
+            if (extra.trailingComments.length > 0) {
+                trailingComments = [];
+                for (i = extra.trailingComments.length - 1; i >= 0; --i) {
+                    comment = extra.trailingComments[i];
+                    if (comment.range[0] >= this.range[1]) {
+                        trailingComments.unshift(comment);
+                        extra.trailingComments.splice(i, 1);
+                    }
+                }
+                extra.trailingComments = [];
+            } else {
+                if (last && last.trailingComments && last.trailingComments[0].range[0] >= this.range[1]) {
+                    trailingComments = last.trailingComments;
+                    delete last.trailingComments;
+                }
+            }
+
+            // Eating the stack.
+            while (last && last.range[0] >= this.range[0]) {
+                lastChild = bottomRight.pop();
+                last = bottomRight[bottomRight.length - 1];
+            }
+
+            if (lastChild) {
+                if (lastChild.leadingComments) {
+                    leadingComments = [];
+                    for (i = lastChild.leadingComments.length - 1; i >= 0; --i) {
+                        comment = lastChild.leadingComments[i];
+                        if (comment.range[1] <= this.range[0]) {
+                            leadingComments.unshift(comment);
+                            lastChild.leadingComments.splice(i, 1);
+                        }
+                    }
+
+                    if (!lastChild.leadingComments.length) {
+                        lastChild.leadingComments = undefined;
+                    }
+                }
+            } else if (extra.leadingComments.length > 0) {
+                leadingComments = [];
+                for (i = extra.leadingComments.length - 1; i >= 0; --i) {
+                    comment = extra.leadingComments[i];
+                    if (comment.range[1] <= this.range[0]) {
+                        leadingComments.unshift(comment);
+                        extra.leadingComments.splice(i, 1);
+                    }
+                }
+            }
+
+
+            if (leadingComments && leadingComments.length > 0) {
+                this.leadingComments = leadingComments;
+            }
+            if (trailingComments && trailingComments.length > 0) {
+                this.trailingComments = trailingComments;
+            }
+
+            bottomRight.push(this);
+        },
+
+        finish: function () {
+            if (extra.range) {
+                this.range[1] = lastIndex;
+            }
+            if (extra.loc) {
+                this.loc.end = {
+                    line: lastLineNumber,
+                    column: lastIndex - lastLineStart
+                };
+                if (extra.source) {
+                    this.loc.source = extra.source;
+                }
+            }
+
+            if (extra.attachComment) {
+                this.processComment();
+            }
+        },
+
+        finishArrayExpression: function (elements) {
+            this.type = Syntax.ArrayExpression;
+            this.elements = elements;
+            this.finish();
+            return this;
+        },
+
+        finishArrayPattern: function (elements) {
+            this.type = Syntax.ArrayPattern;
+            this.elements = elements;
+            this.finish();
+            return this;
+        },
+
+        finishArrowFunctionExpression: function (params, defaults, body, expression) {
+            this.type = Syntax.ArrowFunctionExpression;
+            this.id = null;
+            this.params = params;
+            this.defaults = defaults;
+            this.body = body;
+            this.generator = false;
+            this.expression = expression;
+            this.finish();
+            return this;
+        },
+
+        finishAssignmentExpression: function (operator, left, right) {
+            this.type = Syntax.AssignmentExpression;
+            this.operator = operator;
+            this.left = left;
+            this.right = right;
+            this.finish();
+            return this;
+        },
+
+        finishAssignmentPattern: function (left, right) {
+            this.type = Syntax.AssignmentPattern;
+            this.left = left;
+            this.right = right;
+            this.finish();
+            return this;
+        },
+
+        finishBinaryExpression: function (operator, left, right) {
+            this.type = (operator === '||' || operator === '&&') ? Syntax.LogicalExpression : Syntax.BinaryExpression;
+            this.operator = operator;
+            this.left = left;
+            this.right = right;
+            this.finish();
+            return this;
+        },
+
+        finishBlockStatement: function (body) {
+            this.type = Syntax.BlockStatement;
+            this.body = body;
+            this.finish();
+            return this;
+        },
+
+        finishBreakStatement: function (label) {
+            this.type = Syntax.BreakStatement;
+            this.label = label;
+            this.finish();
+            return this;
+        },
+
+        finishCallExpression: function (callee, args) {
+            this.type = Syntax.CallExpression;
+            this.callee = callee;
+            this.arguments = args;
+            this.finish();
+            return this;
+        },
+
+        finishCatchClause: function (param, body) {
+            this.type = Syntax.CatchClause;
+            this.param = param;
+            this.body = body;
+            this.finish();
+            return this;
+        },
+
+        finishClassBody: function (body) {
+            this.type = Syntax.ClassBody;
+            this.body = body;
+            this.finish();
+            return this;
+        },
+
+        finishClassDeclaration: function (id, superClass, body) {
+            this.type = Syntax.ClassDeclaration;
+            this.id = id;
+            this.superClass = superClass;
+            this.body = body;
+            this.finish();
+            return this;
+        },
+
+        finishClassExpression: function (id, superClass, body) {
+            this.type = Syntax.ClassExpression;
+            this.id = id;
+            this.superClass = superClass;
+            this.body = body;
+            this.finish();
+            return this;
+        },
+
+        finishConditionalExpression: function (test, consequent, alternate) {
+            this.type = Syntax.ConditionalExpression;
+            this.test = test;
+            this.consequent = consequent;
+            this.alternate = alternate;
+            this.finish();
+            return this;
+        },
+
+        finishContinueStatement: function (label) {
+            this.type = Syntax.ContinueStatement;
+            this.label = label;
+            this.finish();
+            return this;
+        },
+
+        finishDebuggerStatement: function () {
+            this.type = Syntax.DebuggerStatement;
+            this.finish();
+            return this;
+        },
+
+        finishDoWhileStatement: function (body, test) {
+            this.type = Syntax.DoWhileStatement;
+            this.body = body;
+            this.test = test;
+            this.finish();
+            return this;
+        },
+
+        finishEmptyStatement: function () {
+            this.type = Syntax.EmptyStatement;
+            this.finish();
+            return this;
+        },
+
+        finishExpressionStatement: function (expression) {
+            this.type = Syntax.ExpressionStatement;
+            this.expression = expression;
+            this.finish();
+            return this;
+        },
+
+        finishForStatement: function (init, test, update, body) {
+            this.type = Syntax.ForStatement;
+            this.init = init;
+            this.test = test;
+            this.update = update;
+            this.body = body;
+            this.finish();
+            return this;
+        },
+
+        finishForOfStatement: function (left, right, body) {
+            this.type = Syntax.ForOfStatement;
+            this.left = left;
+            this.right = right;
+            this.body = body;
+            this.finish();
+            return this;
+        },
+
+        finishForInStatement: function (left, right, body) {
+            this.type = Syntax.ForInStatement;
+            this.left = left;
+            this.right = right;
+            this.body = body;
+            this.each = false;
+            this.finish();
+            return this;
+        },
+
+        finishFunctionDeclaration: function (id, params, defaults, body, generator) {
+            this.type = Syntax.FunctionDeclaration;
+            this.id = id;
+            this.params = params;
+            this.defaults = defaults;
+            this.body = body;
+            this.generator = generator;
+            this.expression = false;
+            this.finish();
+            return this;
+        },
+
+        finishFunctionExpression: function (id, params, defaults, body, generator) {
+            this.type = Syntax.FunctionExpression;
+            this.id = id;
+            this.params = params;
+            this.defaults = defaults;
+            this.body = body;
+            this.generator = generator;
+            this.expression = false;
+            this.finish();
+            return this;
+        },
+
+        finishIdentifier: function (name) {
+            this.type = Syntax.Identifier;
+            this.name = name;
+            this.finish();
+            return this;
+        },
+
+        finishIfStatement: function (test, consequent, alternate) {
+            this.type = Syntax.IfStatement;
+            this.test = test;
+            this.consequent = consequent;
+            this.alternate = alternate;
+            this.finish();
+            return this;
+        },
+
+        finishLabeledStatement: function (label, body) {
+            this.type = Syntax.LabeledStatement;
+            this.label = label;
+            this.body = body;
+            this.finish();
+            return this;
+        },
+
+        finishLiteral: function (token) {
+            this.type = Syntax.Literal;
+            this.value = token.value;
+            this.raw = source.slice(token.start, token.end);
+            if (token.regex) {
+                this.regex = token.regex;
+            }
+            this.finish();
+            return this;
+        },
+
+        finishMemberExpression: function (accessor, object, property) {
+            this.type = Syntax.MemberExpression;
+            this.computed = accessor === '[';
+            this.object = object;
+            this.property = property;
+            this.finish();
+            return this;
+        },
+
+        finishMetaProperty: function (meta, property) {
+            this.type = Syntax.MetaProperty;
+            this.meta = meta;
+            this.property = property;
+            this.finish();
+            return this;
+        },
+
+        finishNewExpression: function (callee, args) {
+            this.type = Syntax.NewExpression;
+            this.callee = callee;
+            this.arguments = args;
+            this.finish();
+            return this;
+        },
+
+        finishObjectExpression: function (properties) {
+            this.type = Syntax.ObjectExpression;
+            this.properties = properties;
+            this.finish();
+            return this;
+        },
+
+        finishObjectPattern: function (properties) {
+            this.type = Syntax.ObjectPattern;
+            this.properties = properties;
+            this.finish();
+            return this;
+        },
+
+        finishPostfixExpression: function (operator, argument) {
+            this.type = Syntax.UpdateExpression;
+            this.operator = operator;
+            this.argument = argument;
+            this.prefix = false;
+            this.finish();
+            return this;
+        },
+
+        finishProgram: function (body, sourceType) {
+            this.type = Syntax.Program;
+            this.body = body;
+            this.sourceType = sourceType;
+            this.finish();
+            return this;
+        },
+
+        finishProperty: function (kind, key, computed, value, method, shorthand) {
+            this.type = Syntax.Property;
+            this.key = key;
+            this.computed = computed;
+            this.value = value;
+            this.kind = kind;
+            this.method = method;
+            this.shorthand = shorthand;
+            this.finish();
+            return this;
+        },
+
+        finishRestElement: function (argument) {
+            this.type = Syntax.RestElement;
+            this.argument = argument;
+            this.finish();
+            return this;
+        },
+
+        finishReturnStatement: function (argument) {
+            this.type = Syntax.ReturnStatement;
+            this.argument = argument;
+            this.finish();
+            return this;
+        },
+
+        finishSequenceExpression: function (expressions) {
+            this.type = Syntax.SequenceExpression;
+            this.expressions = expressions;
+            this.finish();
+            return this;
+        },
+
+        finishSpreadElement: function (argument) {
+            this.type = Syntax.SpreadElement;
+            this.argument = argument;
+            this.finish();
+            return this;
+        },
+
+        finishSwitchCase: function (test, consequent) {
+            this.type = Syntax.SwitchCase;
+            this.test = test;
+            this.consequent = consequent;
+            this.finish();
+            return this;
+        },
+
+        finishSuper: function () {
+            this.type = Syntax.Super;
+            this.finish();
+            return this;
+        },
+
+        finishSwitchStatement: function (discriminant, cases) {
+            this.type = Syntax.SwitchStatement;
+            this.discriminant = discriminant;
+            this.cases = cases;
+            this.finish();
+            return this;
+        },
+
+        finishTaggedTemplateExpression: function (tag, quasi) {
+            this.type = Syntax.TaggedTemplateExpression;
+            this.tag = tag;
+            this.quasi = quasi;
+            this.finish();
+            return this;
+        },
+
+        finishTemplateElement: function (value, tail) {
+            this.type = Syntax.TemplateElement;
+            this.value = value;
+            this.tail = tail;
+            this.finish();
+            return this;
+        },
+
+        finishTemplateLiteral: function (quasis, expressions) {
+            this.type = Syntax.TemplateLiteral;
+            this.quasis = quasis;
+            this.expressions = expressions;
+            this.finish();
+            return this;
+        },
+
+        finishThisExpression: function () {
+            this.type = Syntax.ThisExpression;
+            this.finish();
+            return this;
+        },
+
+        finishThrowStatement: function (argument) {
+            this.type = Syntax.ThrowStatement;
+            this.argument = argument;
+            this.finish();
+            return this;
+        },
+
+        finishTryStatement: function (block, handler, finalizer) {
+            this.type = Syntax.TryStatement;
+            this.block = block;
+            this.guardedHandlers = [];
+            this.handlers = handler ? [handler] : [];
+            this.handler = handler;
+            this.finalizer = finalizer;
+            this.finish();
+            return this;
+        },
+
+        finishUnaryExpression: function (operator, argument) {
+            this.type = (operator === '++' || operator === '--') ? Syntax.UpdateExpression : Syntax.UnaryExpression;
+            this.operator = operator;
+            this.argument = argument;
+            this.prefix = true;
+            this.finish();
+            return this;
+        },
+
+        finishVariableDeclaration: function (declarations) {
+            this.type = Syntax.VariableDeclaration;
+            this.declarations = declarations;
+            this.kind = 'var';
+            this.finish();
+            return this;
+        },
+
+        finishLexicalDeclaration: function (declarations, kind) {
+            this.type = Syntax.VariableDeclaration;
+            this.declarations = declarations;
+            this.kind = kind;
+            this.finish();
+            return this;
+        },
+
+        finishVariableDeclarator: function (id, init) {
+            this.type = Syntax.VariableDeclarator;
+            this.id = id;
+            this.init = init;
+            this.finish();
+            return this;
+        },
+
+        finishWhileStatement: function (test, body) {
+            this.type = Syntax.WhileStatement;
+            this.test = test;
+            this.body = body;
+            this.finish();
+            return this;
+        },
+
+        finishWithStatement: function (object, body) {
+            this.type = Syntax.WithStatement;
+            this.object = object;
+            this.body = body;
+            this.finish();
+            return this;
+        },
+
+        finishExportSpecifier: function (local, exported) {
+            this.type = Syntax.ExportSpecifier;
+            this.exported = exported || local;
+            this.local = local;
+            this.finish();
+            return this;
+        },
+
+        finishImportDefaultSpecifier: function (local) {
+            this.type = Syntax.ImportDefaultSpecifier;
+            this.local = local;
+            this.finish();
+            return this;
+        },
+
+        finishImportNamespaceSpecifier: function (local) {
+            this.type = Syntax.ImportNamespaceSpecifier;
+            this.local = local;
+            this.finish();
+            return this;
+        },
+
+        finishExportNamedDeclaration: function (declaration, specifiers, src) {
+            this.type = Syntax.ExportNamedDeclaration;
+            this.declaration = declaration;
+            this.specifiers = specifiers;
+            this.source = src;
+            this.finish();
+            return this;
+        },
+
+        finishExportDefaultDeclaration: function (declaration) {
+            this.type = Syntax.ExportDefaultDeclaration;
+            this.declaration = declaration;
+            this.finish();
+            return this;
+        },
+
+        finishExportAllDeclaration: function (src) {
+            this.type = Syntax.ExportAllDeclaration;
+            this.source = src;
+            this.finish();
+            return this;
+        },
+
+        finishImportSpecifier: function (local, imported) {
+            this.type = Syntax.ImportSpecifier;
+            this.local = local || imported;
+            this.imported = imported;
+            this.finish();
+            return this;
+        },
+
+        finishImportDeclaration: function (specifiers, src) {
+            this.type = Syntax.ImportDeclaration;
+            this.specifiers = specifiers;
+            this.source = src;
+            this.finish();
+            return this;
+        },
+
+        finishYieldExpression: function (argument, delegate) {
+            this.type = Syntax.YieldExpression;
+            this.argument = argument;
+            this.delegate = delegate;
+            this.finish();
+            return this;
+        }
+    };
+
+
+    function recordError(error) {
+        var e, existing;
+
+        for (e = 0; e < extra.errors.length; e++) {
+            existing = extra.errors[e];
+            // Prevent duplicated error.
+            /* istanbul ignore next */
+            if (existing.index === error.index && existing.message === error.message) {
+                return;
+            }
+        }
+
+        extra.errors.push(error);
+    }
+
+    function constructError(msg, column) {
+        var error = new Error(msg);
+        try {
+            throw error;
+        } catch (base) {
+            /* istanbul ignore else */
+            if (Object.create && Object.defineProperty) {
+                error = Object.create(base);
+                Object.defineProperty(error, 'column', { value: column });
+            }
+        } finally {
+            return error;
+        }
+    }
+
+    function createError(line, pos, description) {
+        var msg, column, error;
+
+        msg = 'Line ' + line + ': ' + description;
+        column = pos - (scanning ? lineStart : lastLineStart) + 1;
+        error = constructError(msg, column);
+        error.lineNumber = line;
+        error.description = description;
+        error.index = pos;
+        return error;
+    }
+
+    // Throw an exception
+
+    function throwError(messageFormat) {
+        var args, msg;
+
+        args = Array.prototype.slice.call(arguments, 1);
+        msg = messageFormat.replace(/%(\d)/g,
+            function (whole, idx) {
+                assert(idx < args.length, 'Message reference must be in range');
+                return args[idx];
+            }
+        );
+
+        throw createError(lastLineNumber, lastIndex, msg);
+    }
+
+    function tolerateError(messageFormat) {
+        var args, msg, error;
+
+        args = Array.prototype.slice.call(arguments, 1);
+        /* istanbul ignore next */
+        msg = messageFormat.replace(/%(\d)/g,
+            function (whole, idx) {
+                assert(idx < args.length, 'Message reference must be in range');
+                return args[idx];
+            }
+        );
+
+        error = createError(lineNumber, lastIndex, msg);
+        if (extra.errors) {
+            recordError(error);
+        } else {
+            throw error;
+        }
+    }
+
+    // Throw an exception because of the token.
+
+    function unexpectedTokenError(token, message) {
+        var value, msg = message || Messages.UnexpectedToken;
+
+        if (token) {
+            if (!message) {
+                msg = (token.type === Token.EOF) ? Messages.UnexpectedEOS :
+                    (token.type === Token.Identifier) ? Messages.UnexpectedIdentifier :
+                    (token.type === Token.NumericLiteral) ? Messages.UnexpectedNumber :
+                    (token.type === Token.StringLiteral) ? Messages.UnexpectedString :
+                    (token.type === Token.Template) ? Messages.UnexpectedTemplate :
+                    Messages.UnexpectedToken;
+
+                if (token.type === Token.Keyword) {
+                    if (isFutureReservedWord(token.value)) {
+                        msg = Messages.UnexpectedReserved;
+                    } else if (strict && isStrictModeReservedWord(token.value)) {
+                        msg = Messages.StrictReservedWord;
+                    }
+                }
+            }
+
+            value = (token.type === Token.Template) ? token.value.raw : token.value;
+        } else {
+            value = 'ILLEGAL';
+        }
+
+        msg = msg.replace('%0', value);
+
+        return (token && typeof token.lineNumber === 'number') ?
+            createError(token.lineNumber, token.start, msg) :
+            createError(scanning ? lineNumber : lastLineNumber, scanning ? index : lastIndex, msg);
+    }
+
+    function throwUnexpectedToken(token, message) {
+        throw unexpectedTokenError(token, message);
+    }
+
+    function tolerateUnexpectedToken(token, message) {
+        var error = unexpectedTokenError(token, message);
+        if (extra.errors) {
+            recordError(error);
+        } else {
+            throw error;
+        }
+    }
+
+    // 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) {
+            throwUnexpectedToken(token);
+        }
+    }
+
+    /**
+     * @name expectCommaSeparator
+     * @description Quietly expect a comma when in tolerant mode, otherwise delegates
+     * to <code>expect(value)</code>
+     * @since 2.0
+     */
+    function expectCommaSeparator() {
+        var token;
+
+        if (extra.errors) {
+            token = lookahead;
+            if (token.type === Token.Punctuator && token.value === ',') {
+                lex();
+            } else if (token.type === Token.Punctuator && token.value === ';') {
+                lex();
+                tolerateUnexpectedToken(token);
+            } else {
+                tolerateUnexpectedToken(token, Messages.UnexpectedToken);
+            }
+        } else {
+            expect(',');
+        }
+    }
+
+    // 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) {
+            throwUnexpectedToken(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
+    // (where an identifier is sometimes a keyword depending on the context)
+
+    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() {
+        // Catch the very common case first: immediately a semicolon (U+003B).
+        if (source.charCodeAt(startIndex) === 0x3B || match(';')) {
+            lex();
+            return;
+        }
+
+        if (hasLineTerminator) {
+            return;
+        }
+
+        // FIXME(ikarienator): this is seemingly an issue in the previous location info convention.
+        lastIndex = startIndex;
+        lastLineNumber = startLineNumber;
+        lastLineStart = startLineStart;
+
+        if (lookahead.type !== Token.EOF && !match('}')) {
+            throwUnexpectedToken(lookahead);
+        }
+    }
+
+    // Cover grammar support.
+    //
+    // When an assignment expression position starts with an left parenthesis, the determination of the type
+    // of the syntax is to be deferred arbitrarily long until the end of the parentheses pair (plus a lookahead)
+    // or the first comma. This situation also defers the determination of all the expressions nested in the pair.
+    //
+    // There are three productions that can be parsed in a parentheses pair that needs to be determined
+    // after the outermost pair is closed. They are:
+    //
+    //   1. AssignmentExpression
+    //   2. BindingElements
+    //   3. AssignmentTargets
+    //
+    // In order to avoid exponential backtracking, we use two flags to denote if the production can be
+    // binding element or assignment target.
+    //
+    // The three productions have the relationship:
+    //
+    //   BindingElements ⊆ AssignmentTargets ⊆ AssignmentExpression
+    //
+    // with a single exception that CoverInitializedName when used directly in an Expression, generates
+    // an early error. Therefore, we need the third state, firstCoverInitializedNameError, to track the
+    // first usage of CoverInitializedName and report it when we reached the end of the parentheses pair.
+    //
+    // isolateCoverGrammar function runs the given parser function with a new cover grammar context, and it does not
+    // effect the current flags. This means the production the parser parses is only used as an expression. Therefore
+    // the CoverInitializedName check is conducted.
+    //
+    // inheritCoverGrammar function runs the given parse function with a new cover grammar context, and it propagates
+    // the flags outside of the parser. This means the production the parser parses is used as a part of a potential
+    // pattern. The CoverInitializedName check is deferred.
+    function isolateCoverGrammar(parser) {
+        var oldIsBindingElement = isBindingElement,
+            oldIsAssignmentTarget = isAssignmentTarget,
+            oldFirstCoverInitializedNameError = firstCoverInitializedNameError,
+            result;
+        isBindingElement = true;
+        isAssignmentTarget = true;
+        firstCoverInitializedNameError = null;
+        result = parser();
+        if (firstCoverInitializedNameError !== null) {
+            throwUnexpectedToken(firstCoverInitializedNameError);
+        }
+        isBindingElement = oldIsBindingElement;
+        isAssignmentTarget = oldIsAssignmentTarget;
+        firstCoverInitializedNameError = oldFirstCoverInitializedNameError;
+        return result;
+    }
+
+    function inheritCoverGrammar(parser) {
+        var oldIsBindingElement = isBindingElement,
+            oldIsAssignmentTarget = isAssignmentTarget,
+            oldFirstCoverInitializedNameError = firstCoverInitializedNameError,
+            result;
+        isBindingElement = true;
+        isAssignmentTarget = true;
+        firstCoverInitializedNameError = null;
+        result = parser();
+        isBindingElement = isBindingElement && oldIsBindingElement;
+        isAssignmentTarget = isAssignmentTarget && oldIsAssignmentTarget;
+        firstCoverInitializedNameError = oldFirstCoverInitializedNameError || firstCoverInitializedNameError;
+        return result;
+    }
+
+    // ECMA-262 13.3.3 Destructuring Binding Patterns
+
+    function parseArrayPattern(params, kind) {
+        var node = new Node(), elements = [], rest, restNode;
+        expect('[');
+
+        while (!match(']')) {
+            if (match(',')) {
+                lex();
+                elements.push(null);
+            } else {
+                if (match('...')) {
+                    restNode = new Node();
+                    lex();
+                    params.push(lookahead);
+                    rest = parseVariableIdentifier(kind);
+                    elements.push(restNode.finishRestElement(rest));
+                    break;
+                } else {
+                    elements.push(parsePatternWithDefault(params, kind));
+                }
+                if (!match(']')) {
+                    expect(',');
+                }
+            }
+
+        }
+
+        expect(']');
+
+        return node.finishArrayPattern(elements);
+    }
+
+    function parsePropertyPattern(params, kind) {
+        var node = new Node(), key, keyToken, computed = match('['), init;
+        if (lookahead.type === Token.Identifier) {
+            keyToken = lookahead;
+            key = parseVariableIdentifier();
+            if (match('=')) {
+                params.push(keyToken);
+                lex();
+                init = parseAssignmentExpression();
+
+                return node.finishProperty(
+                    'init', key, false,
+                    new WrappingNode(keyToken).finishAssignmentPattern(key, init), false, true);
+            } else if (!match(':')) {
+                params.push(keyToken);
+                return node.finishProperty('init', key, false, key, false, true);
+            }
+        } else {
+            key = parseObjectPropertyKey();
+        }
+        expect(':');
+        init = parsePatternWithDefault(params, kind);
+        return node.finishProperty('init', key, computed, init, false, false);
+    }
+
+    function parseObjectPattern(params, kind) {
+        var node = new Node(), properties = [];
+
+        expect('{');
+
+        while (!match('}')) {
+            properties.push(parsePropertyPattern(params, kind));
+            if (!match('}')) {
+                expect(',');
+            }
+        }
+
+        lex();
+
+        return node.finishObjectPattern(properties);
+    }
+
+    function parsePattern(params, kind) {
+        if (match('[')) {
+            return parseArrayPattern(params, kind);
+        } else if (match('{')) {
+            return parseObjectPattern(params, kind);
+        } else if (matchKeyword('let')) {
+            if (kind === 'const' || kind === 'let') {
+                tolerateUnexpectedToken(lookahead, Messages.UnexpectedToken);
+            }
+        }
+
+        params.push(lookahead);
+        return parseVariableIdentifier(kind);
+    }
+
+    function parsePatternWithDefault(params, kind) {
+        var startToken = lookahead, pattern, previousAllowYield, right;
+        pattern = parsePattern(params, kind);
+        if (match('=')) {
+            lex();
+            previousAllowYield = state.allowYield;
+            state.allowYield = true;
+            right = isolateCoverGrammar(parseAssignmentExpression);
+            state.allowYield = previousAllowYield;
+            pattern = new WrappingNode(startToken).finishAssignmentPattern(pattern, right);
+        }
+        return pattern;
+    }
+
+    // ECMA-262 12.2.5 Array Initializer
+
+    function parseArrayInitializer() {
+        var elements = [], node = new Node(), restSpread;
+
+        expect('[');
+
+        while (!match(']')) {
+            if (match(',')) {
+                lex();
+                elements.push(null);
+            } else if (match('...')) {
+                restSpread = new Node();
+                lex();
+                restSpread.finishSpreadElement(inheritCoverGrammar(parseAssignmentExpression));
+
+                if (!match(']')) {
+                    isAssignmentTarget = isBindingElement = false;
+                    expect(',');
+                }
+                elements.push(restSpread);
+            } else {
+                elements.push(inheritCoverGrammar(parseAssignmentExpression));
+
+                if (!match(']')) {
+                    expect(',');
+                }
+            }
+        }
+
+        lex();
+
+        return node.finishArrayExpression(elements);
+    }
+
+    // ECMA-262 12.2.6 Object Initializer
+
+    function parsePropertyFunction(node, paramInfo, isGenerator) {
+        var previousStrict, body;
+
+        isAssignmentTarget = isBindingElement = false;
+
+        previousStrict = strict;
+        body = isolateCoverGrammar(parseFunctionSourceElements);
+
+        if (strict && paramInfo.firstRestricted) {
+            tolerateUnexpectedToken(paramInfo.firstRestricted, paramInfo.message);
+        }
+        if (strict && paramInfo.stricted) {
+            tolerateUnexpectedToken(paramInfo.stricted, paramInfo.message);
+        }
+
+        strict = previousStrict;
+        return node.finishFunctionExpression(null, paramInfo.params, paramInfo.defaults, body, isGenerator);
+    }
+
+    function parsePropertyMethodFunction() {
+        var params, method, node = new Node(),
+            previousAllowYield = state.allowYield;
+
+        state.allowYield = false;
+        params = parseParams();
+        state.allowYield = previousAllowYield;
+
+        state.allowYield = false;
+        method = parsePropertyFunction(node, params, false);
+        state.allowYield = previousAllowYield;
+
+        return method;
+    }
+
+    function parseObjectPropertyKey() {
+        var token, node = new Node(), expr;
+
+        token = lex();
+
+        // Note: This function is called only from parseObjectProperty(), where
+        // EOF and Punctuator tokens are already filtered out.
+
+        switch (token.type) {
+        case Token.StringLiteral:
+        case Token.NumericLiteral:
+            if (strict && token.octal) {
+                tolerateUnexpectedToken(token, Messages.StrictOctalLiteral);
+            }
+            return node.finishLiteral(token);
+        case Token.Identifier:
+        case Token.BooleanLiteral:
+        case Token.NullLiteral:
+        case Token.Keyword:
+            return node.finishIdentifier(token.value);
+        case Token.Punctuator:
+            if (token.value === '[') {
+                expr = isolateCoverGrammar(parseAssignmentExpression);
+                expect(']');
+                return expr;
+            }
+            break;
+        }
+        throwUnexpectedToken(token);
+    }
+
+    function lookaheadPropertyName() {
+        switch (lookahead.type) {
+        case Token.Identifier:
+        case Token.StringLiteral:
+        case Token.BooleanLiteral:
+        case Token.NullLiteral:
+        case Token.NumericLiteral:
+        case Token.Keyword:
+            return true;
+        case Token.Punctuator:
+            return lookahead.value === '[';
+        }
+        return false;
+    }
+
+    // This function is to try to parse a MethodDefinition as defined in 14.3. But in the case of object literals,
+    // it might be called at a position where there is in fact a short hand identifier pattern or a data property.
+    // This can only be determined after we consumed up to the left parentheses.
+    //
+    // In order to avoid back tracking, it returns `null` if the position is not a MethodDefinition and the caller
+    // is responsible to visit other options.
+    function tryParseMethodDefinition(token, key, computed, node) {
+        var value, options, methodNode, params,
+            previousAllowYield = state.allowYield;
+
+        if (token.type === Token.Identifier) {
+            // check for `get` and `set`;
+
+            if (token.value === 'get' && lookaheadPropertyName()) {
+                computed = match('[');
+                key = parseObjectPropertyKey();
+                methodNode = new Node();
+                expect('(');
+                expect(')');
+
+                state.allowYield = false;
+                value = parsePropertyFunction(methodNode, {
+                    params: [],
+                    defaults: [],
+                    stricted: null,
+                    firstRestricted: null,
+                    message: null
+                }, false);
+                state.allowYield = previousAllowYield;
+
+                return node.finishProperty('get', key, computed, value, false, false);
+            } else if (token.value === 'set' && lookaheadPropertyName()) {
+                computed = match('[');
+                key = parseObjectPropertyKey();
+                methodNode = new Node();
+                expect('(');
+
+                options = {
+                    params: [],
+                    defaultCount: 0,
+                    defaults: [],
+                    firstRestricted: null,
+                    paramSet: {}
+                };
+                if (match(')')) {
+                    tolerateUnexpectedToken(lookahead);
+                } else {
+                    state.allowYield = false;
+                    parseParam(options);
+                    state.allowYield = previousAllowYield;
+                    if (options.defaultCount === 0) {
+                        options.defaults = [];
+                    }
+                }
+                expect(')');
+
+                state.allowYield = false;
+                value = parsePropertyFunction(methodNode, options, false);
+                state.allowYield = previousAllowYield;
+
+                return node.finishProperty('set', key, computed, value, false, false);
+            }
+        } else if (token.type === Token.Punctuator && token.value === '*' && lookaheadPropertyName()) {
+            computed = match('[');
+            key = parseObjectPropertyKey();
+            methodNode = new Node();
+
+            state.allowYield = true;
+            params = parseParams();
+            state.allowYield = previousAllowYield;
+
+            state.allowYield = false;
+            value = parsePropertyFunction(methodNode, params, true);
+            state.allowYield = previousAllowYield;
+
+            return node.finishProperty('init', key, computed, value, true, false);
+        }
+
+        if (key && match('(')) {
+            value = parsePropertyMethodFunction();
+            return node.finishProperty('init', key, computed, value, true, false);
+        }
+
+        // Not a MethodDefinition.
+        return null;
+    }
+
+    function parseObjectProperty(hasProto) {
+        var token = lookahead, node = new Node(), computed, key, maybeMethod, proto, value;
+
+        computed = match('[');
+        if (match('*')) {
+            lex();
+        } else {
+            key = parseObjectPropertyKey();
+        }
+        maybeMethod = tryParseMethodDefinition(token, key, computed, node);
+        if (maybeMethod) {
+            return maybeMethod;
+        }
+
+        if (!key) {
+            throwUnexpectedToken(lookahead);
+        }
+
+        // Check for duplicated __proto__
+        if (!computed) {
+            proto = (key.type === Syntax.Identifier && key.name === '__proto__') ||
+                (key.type === Syntax.Literal && key.value === '__proto__');
+            if (hasProto.value && proto) {
+                tolerateError(Messages.DuplicateProtoProperty);
+            }
+            hasProto.value |= proto;
+        }
+
+        if (match(':')) {
+            lex();
+            value = inheritCoverGrammar(parseAssignmentExpression);
+            return node.finishProperty('init', key, computed, value, false, false);
+        }
+
+        if (token.type === Token.Identifier) {
+            if (match('=')) {
+                firstCoverInitializedNameError = lookahead;
+                lex();
+                value = isolateCoverGrammar(parseAssignmentExpression);
+                return node.finishProperty('init', key, computed,
+                    new WrappingNode(token).finishAssignmentPattern(key, value), false, true);
+            }
+            return node.finishProperty('init', key, computed, key, false, true);
+        }
+
+        throwUnexpectedToken(lookahead);
+    }
+
+    function parseObjectInitializer() {
+        var properties = [], hasProto = {value: false}, node = new Node();
+
+        expect('{');
+
+        while (!match('}')) {
+            properties.push(parseObjectProperty(hasProto));
+
+            if (!match('}')) {
+                expectCommaSeparator();
+            }
+        }
+
+        expect('}');
+
+        return node.finishObjectExpression(properties);
+    }
+
+    function reinterpretExpressionAsPattern(expr) {
+        var i;
+        switch (expr.type) {
+        case Syntax.Identifier:
+        case Syntax.MemberExpression:
+        case Syntax.RestElement:
+        case Syntax.AssignmentPattern:
+            break;
+        case Syntax.SpreadElement:
+            expr.type = Syntax.RestElement;
+            reinterpretExpressionAsPattern(expr.argument);
+            break;
+        case Syntax.ArrayExpression:
+            expr.type = Syntax.ArrayPattern;
+            for (i = 0; i < expr.elements.length; i++) {
+                if (expr.elements[i] !== null) {
+                    reinterpretExpressionAsPattern(expr.elements[i]);
+                }
+            }
+            break;
+        case Syntax.ObjectExpression:
+            expr.type = Syntax.ObjectPattern;
+            for (i = 0; i < expr.properties.length; i++) {
+                reinterpretExpressionAsPattern(expr.properties[i].value);
+            }
+            break;
+        case Syntax.AssignmentExpression:
+            expr.type = Syntax.AssignmentPattern;
+            reinterpretExpressionAsPattern(expr.left);
+            break;
+        default:
+            // Allow other node type for tolerant parsing.
+            break;
+        }
+    }
+
+    // ECMA-262 12.2.9 Template Literals
+
+    function parseTemplateElement(option) {
+        var node, token;
+
+        if (lookahead.type !== Token.Template || (option.head && !lookahead.head)) {
+            throwUnexpectedToken();
+        }
+
+        node = new Node();
+        token = lex();
+
+        return node.finishTemplateElement({ raw: token.value.raw, cooked: token.value.cooked }, token.tail);
+    }
+
+    function parseTemplateLiteral() {
+        var quasi, quasis, expressions, node = new Node();
+
+        quasi = parseTemplateElement({ head: true });
+        quasis = [quasi];
+        expressions = [];
+
+        while (!quasi.tail) {
+            expressions.push(parseExpression());
+            quasi = parseTemplateElement({ head: false });
+            quasis.push(quasi);
+        }
+
+        return node.finishTemplateLiteral(quasis, expressions);
+    }
+
+    // ECMA-262 12.2.10 The Grouping Operator
+
+    function parseGroupExpression() {
+        var expr, expressions, startToken, i, params = [];
+
+        expect('(');
+
+        if (match(')')) {
+            lex();
+            if (!match('=>')) {
+                expect('=>');
+            }
+            return {
+                type: PlaceHolders.ArrowParameterPlaceHolder,
+                params: [],
+                rawParams: []
+            };
+        }
+
+        startToken = lookahead;
+        if (match('...')) {
+            expr = parseRestElement(params);
+            expect(')');
+            if (!match('=>')) {
+                expect('=>');
+            }
+            return {
+                type: PlaceHolders.ArrowParameterPlaceHolder,
+                params: [expr]
+            };
+        }
+
+        isBindingElement = true;
+        expr = inheritCoverGrammar(parseAssignmentExpression);
+
+        if (match(',')) {
+            isAssignmentTarget = false;
+            expressions = [expr];
+
+            while (startIndex < length) {
+                if (!match(',')) {
+                    break;
+                }
+                lex();
+
+                if (match('...')) {
+                    if (!isBindingElement) {
+                        throwUnexpectedToken(lookahead);
+                    }
+                    expressions.push(parseRestElement(params));
+                    expect(')');
+                    if (!match('=>')) {
+                        expect('=>');
+                    }
+                    isBindingElement = false;
+                    for (i = 0; i < expressions.length; i++) {
+                        reinterpretExpressionAsPattern(expressions[i]);
+                    }
+                    return {
+                        type: PlaceHolders.ArrowParameterPlaceHolder,
+                        params: expressions
+                    };
+                }
+
+                expressions.push(inheritCoverGrammar(parseAssignmentExpression));
+            }
+
+            expr = new WrappingNode(startToken).finishSequenceExpression(expressions);
+        }
+
+
+        expect(')');
+
+        if (match('=>')) {
+            if (expr.type === Syntax.Identifier && expr.name === 'yield') {
+                return {
+                    type: PlaceHolders.ArrowParameterPlaceHolder,
+                    params: [expr]
+                };
+            }
+
+            if (!isBindingElement) {
+                throwUnexpectedToken(lookahead);
+            }
+
+            if (expr.type === Syntax.SequenceExpression) {
+                for (i = 0; i < expr.expressions.length; i++) {
+                    reinterpretExpressionAsPattern(expr.expressions[i]);
+                }
+            } else {
+                reinterpretExpressionAsPattern(expr);
+            }
+
+            expr = {
+                type: PlaceHolders.ArrowParameterPlaceHolder,
+                params: expr.type === Syntax.SequenceExpression ? expr.expressions : [expr]
+            };
+        }
+        isBindingElement = false;
+        return expr;
+    }
+
+
+    // ECMA-262 12.2 Primary Expressions
+
+    function parsePrimaryExpression() {
+        var type, token, expr, node;
+
+        if (match('(')) {
+            isBindingElement = false;
+            return inheritCoverGrammar(parseGroupExpression);
+        }
+
+        if (match('[')) {
+            return inheritCoverGrammar(parseArrayInitializer);
+        }
+
+        if (match('{')) {
+            return inheritCoverGrammar(parseObjectInitializer);
+        }
+
+        type = lookahead.type;
+        node = new Node();
+
+        if (type === Token.Identifier) {
+            if (state.sourceType === 'module' && lookahead.value === 'await') {
+                tolerateUnexpectedToken(lookahead);
+            }
+            expr = node.finishIdentifier(lex().value);
+        } else if (type === Token.StringLiteral || type === Token.NumericLiteral) {
+            isAssignmentTarget = isBindingElement = false;
+            if (strict && lookahead.octal) {
+                tolerateUnexpectedToken(lookahead, Messages.StrictOctalLiteral);
+            }
+            expr = node.finishLiteral(lex());
+        } else if (type === Token.Keyword) {
+            if (!strict && state.allowYield && matchKeyword('yield')) {
+                return parseNonComputedProperty();
+            }
+            if (!strict && matchKeyword('let')) {
+                return node.finishIdentifier(lex().value);
+            }
+            isAssignmentTarget = isBindingElement = false;
+            if (matchKeyword('function')) {
+                return parseFunctionExpression();
+            }
+            if (matchKeyword('this')) {
+                lex();
+                return node.finishThisExpression();
+            }
+            if (matchKeyword('class')) {
+                return parseClassExpression();
+            }
+            throwUnexpectedToken(lex());
+        } else if (type === Token.BooleanLiteral) {
+            isAssignmentTarget = isBindingElement = false;
+            token = lex();
+            token.value = (token.value === 'true');
+            expr = node.finishLiteral(token);
+        } else if (type === Token.NullLiteral) {
+            isAssignmentTarget = isBindingElement = false;
+            token = lex();
+            token.value = null;
+            expr = node.finishLiteral(token);
+        } else if (match('/') || match('/=')) {
+            isAssignmentTarget = isBindingElement = false;
+            index = startIndex;
+
+            if (typeof extra.tokens !== 'undefined') {
+                token = collectRegex();
+            } else {
+                token = scanRegExp();
+            }
+            lex();
+            expr = node.finishLiteral(token);
+        } else if (type === Token.Template) {
+            expr = parseTemplateLiteral();
+        } else {
+            throwUnexpectedToken(lex());
+        }
+
+        return expr;
+    }
+
+    // ECMA-262 12.3 Left-Hand-Side Expressions
+
+    function parseArguments() {
+        var args = [], expr;
+
+        expect('(');
+
+        if (!match(')')) {
+            while (startIndex < length) {
+                if (match('...')) {
+                    expr = new Node();
+                    lex();
+                    expr.finishSpreadElement(isolateCoverGrammar(parseAssignmentExpression));
+                } else {
+                    expr = isolateCoverGrammar(parseAssignmentExpression);
+                }
+                args.push(expr);
+                if (match(')')) {
+                    break;
+                }
+                expectCommaSeparator();
+            }
+        }
+
+        expect(')');
+
+        return args;
+    }
+
+    function parseNonComputedProperty() {
+        var token, node = new Node();
+
+        token = lex();
+
+        if (!isIdentifierName(token)) {
+            throwUnexpectedToken(token);
+        }
+
+        return node.finishIdentifier(token.value);
+    }
+
+    function parseNonComputedMember() {
+        expect('.');
+
+        return parseNonComputedProperty();
+    }
+
+    function parseComputedMember() {
+        var expr;
+
+        expect('[');
+
+        expr = isolateCoverGrammar(parseExpression);
+
+        expect(']');
+
+        return expr;
+    }
+
+    // ECMA-262 12.3.3 The new Operator
+
+    function parseNewExpression() {
+        var callee, args, node = new Node();
+
+        expectKeyword('new');
+
+        if (match('.')) {
+            lex();
+            if (lookahead.type === Token.Identifier && lookahead.value === 'target') {
+                if (state.inFunctionBody) {
+                    lex();
+                    return node.finishMetaProperty('new', 'target');
+                }
+            }
+            throwUnexpectedToken(lookahead);
+        }
+
+        callee = isolateCoverGrammar(parseLeftHandSideExpression);
+        args = match('(') ? parseArguments() : [];
+
+        isAssignmentTarget = isBindingElement = false;
+
+        return node.finishNewExpression(callee, args);
+    }
+
+    // ECMA-262 12.3.4 Function Calls
+
+    function parseLeftHandSideExpressionAllowCall() {
+        var quasi, expr, args, property, startToken, previousAllowIn = state.allowIn;
+
+        startToken = lookahead;
+        state.allowIn = true;
+
+        if (matchKeyword('super') && state.inFunctionBody) {
+            expr = new Node();
+            lex();
+            expr = expr.finishSuper();
+            if (!match('(') && !match('.') && !match('[')) {
+                throwUnexpectedToken(lookahead);
+            }
+        } else {
+            expr = inheritCoverGrammar(matchKeyword('new') ? parseNewExpression : parsePrimaryExpression);
+        }
+
+        for (;;) {
+            if (match('.')) {
+                isBindingElement = false;
+                isAssignmentTarget = true;
+                property = parseNonComputedMember();
+                expr = new WrappingNode(startToken).finishMemberExpression('.', expr, property);
+            } else if (match('(')) {
+                isBindingElement = false;
+                isAssignmentTarget = false;
+                args = parseArguments();
+                expr = new WrappingNode(startToken).finishCallExpression(expr, args);
+            } else if (match('[')) {
+                isBindingElement = false;
+                isAssignmentTarget = true;
+                property = parseComputedMember();
+                expr = new WrappingNode(startToken).finishMemberExpression('[', expr, property);
+            } else if (lookahead.type === Token.Template && lookahead.head) {
+                quasi = parseTemplateLiteral();
+                expr = new WrappingNode(startToken).finishTaggedTemplateExpression(expr, quasi);
+            } else {
+                break;
+            }
+        }
+        state.allowIn = previousAllowIn;
+
+        return expr;
+    }
+
+    // ECMA-262 12.3 Left-Hand-Side Expressions
+
+    function parseLeftHandSideExpression() {
+        var quasi, expr, property, startToken;
+        assert(state.allowIn, 'callee of new expression always allow in keyword.');
+
+        startToken = lookahead;
+
+        if (matchKeyword('super') && state.inFunctionBody) {
+            expr = new Node();
+            lex();
+            expr = expr.finishSuper();
+            if (!match('[') && !match('.')) {
+                throwUnexpectedToken(lookahead);
+            }
+        } else {
+            expr = inheritCoverGrammar(matchKeyword('new') ? parseNewExpression : parsePrimaryExpression);
+        }
+
+        for (;;) {
+            if (match('[')) {
+                isBindingElement = false;
+                isAssignmentTarget = true;
+                property = parseComputedMember();
+                expr = new WrappingNode(startToken).finishMemberExpression('[', expr, property);
+            } else if (match('.')) {
+                isBindingElement = false;
+                isAssignmentTarget = true;
+                property = parseNonComputedMember();
+                expr = new WrappingNode(startToken).finishMemberExpression('.', expr, property);
+            } else if (lookahead.type === Token.Template && lookahead.head) {
+                quasi = parseTemplateLiteral();
+                expr = new WrappingNode(startToken).finishTaggedTemplateExpression(expr, quasi);
+            } else {
+                break;
+            }
+        }
+        return expr;
+    }
+
+    // ECMA-262 12.4 Postfix Expressions
+
+    function parsePostfixExpression() {
+        var expr, token, startToken = lookahead;
+
+        expr = inheritCoverGrammar(parseLeftHandSideExpressionAllowCall);
+
+        if (!hasLineTerminator && lookahead.type === Token.Punctuator) {
+            if (match('++') || match('--')) {
+                // ECMA-262 11.3.1, 11.3.2
+                if (strict && expr.type === Syntax.Identifier && isRestrictedWord(expr.name)) {
+                    tolerateError(Messages.StrictLHSPostfix);
+                }
+
+                if (!isAssignmentTarget) {
+                    tolerateError(Messages.InvalidLHSInAssignment);
+                }
+
+                isAssignmentTarget = isBindingElement = false;
+
+                token = lex();
+                expr = new WrappingNode(startToken).finishPostfixExpression(token.value, expr);
+            }
+        }
+
+        return expr;
+    }
+
+    // ECMA-262 12.5 Unary Operators
+
+    function parseUnaryExpression() {
+        var token, expr, startToken;
+
+        if (lookahead.type !== Token.Punctuator && lookahead.type !== Token.Keyword) {
+            expr = parsePostfixExpression();
+        } else if (match('++') || match('--')) {
+            startToken = lookahead;
+            token = lex();
+            expr = inheritCoverGrammar(parseUnaryExpression);
+            // ECMA-262 11.4.4, 11.4.5
+            if (strict && expr.type === Syntax.Identifier && isRestrictedWord(expr.name)) {
+                tolerateError(Messages.StrictLHSPrefix);
+            }
+
+            if (!isAssignmentTarget) {
+                tolerateError(Messages.InvalidLHSInAssignment);
+            }
+            expr = new WrappingNode(startToken).finishUnaryExpression(token.value, expr);
+            isAssignmentTarget = isBindingElement = false;
+        } else if (match('+') || match('-') || match('~') || match('!')) {
+            startToken = lookahead;
+            token = lex();
+            expr = inheritCoverGrammar(parseUnaryExpression);
+            expr = new WrappingNode(startToken).finishUnaryExpression(token.value, expr);
+            isAssignmentTarget = isBindingElement = false;
+        } else if (matchKeyword('delete') || matchKeyword('void') || matchKeyword('typeof')) {
+            startToken = lookahead;
+            token = lex();
+            expr = inheritCoverGrammar(parseUnaryExpression);
+            expr = new WrappingNode(startToken).finishUnaryExpression(token.value, expr);
+            if (strict && expr.operator === 'delete' && expr.argument.type === Syntax.Identifier) {
+                tolerateError(Messages.StrictDelete);
+            }
+            isAssignmentTarget = isBindingElement = false;
+        } else {
+            expr = parsePostfixExpression();
+        }
+
+        return expr;
+    }
+
+    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;
+    }
+
+    // ECMA-262 12.6 Multiplicative Operators
+    // ECMA-262 12.7 Additive Operators
+    // ECMA-262 12.8 Bitwise Shift Operators
+    // ECMA-262 12.9 Relational Operators
+    // ECMA-262 12.10 Equality Operators
+    // ECMA-262 12.11 Binary Bitwise Operators
+    // ECMA-262 12.12 Binary Logical Operators
+
+    function parseBinaryExpression() {
+        var marker, markers, expr, token, prec, stack, right, operator, left, i;
+
+        marker = lookahead;
+        left = inheritCoverGrammar(parseUnaryExpression);
+
+        token = lookahead;
+        prec = binaryPrecedence(token, state.allowIn);
+        if (prec === 0) {
+            return left;
+        }
+        isAssignmentTarget = isBindingElement = false;
+        token.prec = prec;
+        lex();
+
+        markers = [marker, lookahead];
+        right = isolateCoverGrammar(parseUnaryExpression);
+
+        stack = [left, token, right];
+
+        while ((prec = binaryPrecedence(lookahead, state.allowIn)) > 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();
+                markers.pop();
+                expr = new WrappingNode(markers[markers.length - 1]).finishBinaryExpression(operator, left, right);
+                stack.push(expr);
+            }
+
+            // Shift.
+            token = lex();
+            token.prec = prec;
+            stack.push(token);
+            markers.push(lookahead);
+            expr = isolateCoverGrammar(parseUnaryExpression);
+            stack.push(expr);
+        }
+
+        // Final reduce to clean-up the stack.
+        i = stack.length - 1;
+        expr = stack[i];
+        markers.pop();
+        while (i > 1) {
+            expr = new WrappingNode(markers.pop()).finishBinaryExpression(stack[i - 1].value, stack[i - 2], expr);
+            i -= 2;
+        }
+
+        return expr;
+    }
+
+
+    // ECMA-262 12.13 Conditional Operator
+
+    function parseConditionalExpression() {
+        var expr, previousAllowIn, consequent, alternate, startToken;
+
+        startToken = lookahead;
+
+        expr = inheritCoverGrammar(parseBinaryExpression);
+        if (match('?')) {
+            lex();
+            previousAllowIn = state.allowIn;
+            state.allowIn = true;
+            consequent = isolateCoverGrammar(parseAssignmentExpression);
+            state.allowIn = previousAllowIn;
+            expect(':');
+            alternate = isolateCoverGrammar(parseAssignmentExpression);
+
+            expr = new WrappingNode(startToken).finishConditionalExpression(expr, consequent, alternate);
+            isAssignmentTarget = isBindingElement = false;
+        }
+
+        return expr;
+    }
+
+    // ECMA-262 14.2 Arrow Function Definitions
+
+    function parseConciseBody() {
+        if (match('{')) {
+            return parseFunctionSourceElements();
+        }
+        return isolateCoverGrammar(parseAssignmentExpression);
+    }
+
+    function checkPatternParam(options, param) {
+        var i;
+        switch (param.type) {
+        case Syntax.Identifier:
+            validateParam(options, param, param.name);
+            break;
+        case Syntax.RestElement:
+            checkPatternParam(options, param.argument);
+            break;
+        case Syntax.AssignmentPattern:
+            checkPatternParam(options, param.left);
+            break;
+        case Syntax.ArrayPattern:
+            for (i = 0; i < param.elements.length; i++) {
+                if (param.elements[i] !== null) {
+                    checkPatternParam(options, param.elements[i]);
+                }
+            }
+            break;
+        case Syntax.YieldExpression:
+            break;
+        default:
+            assert(param.type === Syntax.ObjectPattern, 'Invalid type');
+            for (i = 0; i < param.properties.length; i++) {
+                checkPatternParam(options, param.properties[i].value);
+            }
+            break;
+        }
+    }
+    function reinterpretAsCoverFormalsList(expr) {
+        var i, len, param, params, defaults, defaultCount, options, token;
+
+        defaults = [];
+        defaultCount = 0;
+        params = [expr];
+
+        switch (expr.type) {
+        case Syntax.Identifier:
+            break;
+        case PlaceHolders.ArrowParameterPlaceHolder:
+            params = expr.params;
+            break;
+        default:
+            return null;
+        }
+
+        options = {
+            paramSet: {}
+        };
+
+        for (i = 0, len = params.length; i < len; i += 1) {
+            param = params[i];
+            switch (param.type) {
+            case Syntax.AssignmentPattern:
+                params[i] = param.left;
+                if (param.right.type === Syntax.YieldExpression) {
+                    if (param.right.argument) {
+                        throwUnexpectedToken(lookahead);
+                    }
+                    param.right.type = Syntax.Identifier;
+                    param.right.name = 'yield';
+                    delete param.right.argument;
+                    delete param.right.delegate;
+                }
+                defaults.push(param.right);
+                ++defaultCount;
+                checkPatternParam(options, param.left);
+                break;
+            default:
+                checkPatternParam(options, param);
+                params[i] = param;
+                defaults.push(null);
+                break;
+            }
+        }
+
+        if (strict || !state.allowYield) {
+            for (i = 0, len = params.length; i < len; i += 1) {
+                param = params[i];
+                if (param.type === Syntax.YieldExpression) {
+                    throwUnexpectedToken(lookahead);
+                }
+            }
+        }
+
+        if (options.message === Messages.StrictParamDupe) {
+            token = strict ? options.stricted : options.firstRestricted;
+            throwUnexpectedToken(token, options.message);
+        }
+
+        if (defaultCount === 0) {
+            defaults = [];
+        }
+
+        return {
+            params: params,
+            defaults: defaults,
+            stricted: options.stricted,
+            firstRestricted: options.firstRestricted,
+            message: options.message
+        };
+    }
+
+    function parseArrowFunctionExpression(options, node) {
+        var previousStrict, previousAllowYield, body;
+
+        if (hasLineTerminator) {
+            tolerateUnexpectedToken(lookahead);
+        }
+        expect('=>');
+
+        previousStrict = strict;
+        previousAllowYield = state.allowYield;
+        state.allowYield = true;
+
+        body = parseConciseBody();
+
+        if (strict && options.firstRestricted) {
+            throwUnexpectedToken(options.firstRestricted, options.message);
+        }
+        if (strict && options.stricted) {
+            tolerateUnexpectedToken(options.stricted, options.message);
+        }
+
+        strict = previousStrict;
+        state.allowYield = previousAllowYield;
+
+        return node.finishArrowFunctionExpression(options.params, options.defaults, body, body.type !== Syntax.BlockStatement);
+    }
+
+    // ECMA-262 14.4 Yield expression
+
+    function parseYieldExpression() {
+        var argument, expr, delegate, previousAllowYield;
+
+        argument = null;
+        expr = new Node();
+        delegate = false;
+
+        expectKeyword('yield');
+
+        if (!hasLineTerminator) {
+            previousAllowYield = state.allowYield;
+            state.allowYield = false;
+            delegate = match('*');
+            if (delegate) {
+                lex();
+                argument = parseAssignmentExpression();
+            } else {
+                if (!match(';') && !match('}') && !match(')') && lookahead.type !== Token.EOF) {
+                    argument = parseAssignmentExpression();
+                }
+            }
+            state.allowYield = previousAllowYield;
+        }
+
+        return expr.finishYieldExpression(argument, delegate);
+    }
+
+    // ECMA-262 12.14 Assignment Operators
+
+    function parseAssignmentExpression() {
+        var token, expr, right, list, startToken;
+
+        startToken = lookahead;
+        token = lookahead;
+
+        if (!state.allowYield && matchKeyword('yield')) {
+            return parseYieldExpression();
+        }
+
+        expr = parseConditionalExpression();
+
+        if (expr.type === PlaceHolders.ArrowParameterPlaceHolder || match('=>')) {
+            isAssignmentTarget = isBindingElement = false;
+            list = reinterpretAsCoverFormalsList(expr);
+
+            if (list) {
+                firstCoverInitializedNameError = null;
+                return parseArrowFunctionExpression(list, new WrappingNode(startToken));
+            }
+
+            return expr;
+        }
+
+        if (matchAssign()) {
+            if (!isAssignmentTarget) {
+                tolerateError(Messages.InvalidLHSInAssignment);
+            }
+
+            // ECMA-262 12.1.1
+            if (strict && expr.type === Syntax.Identifier) {
+                if (isRestrictedWord(expr.name)) {
+                    tolerateUnexpectedToken(token, Messages.StrictLHSAssignment);
+                }
+                if (isStrictModeReservedWord(expr.name)) {
+                    tolerateUnexpectedToken(token, Messages.StrictReservedWord);
+                }
+            }
+
+            if (!match('=')) {
+                isAssignmentTarget = isBindingElement = false;
+            } else {
+                reinterpretExpressionAsPattern(expr);
+            }
+
+            token = lex();
+            right = isolateCoverGrammar(parseAssignmentExpression);
+            expr = new WrappingNode(startToken).finishAssignmentExpression(token.value, expr, right);
+            firstCoverInitializedNameError = null;
+        }
+
+        return expr;
+    }
+
+    // ECMA-262 12.15 Comma Operator
+
+    function parseExpression() {
+        var expr, startToken = lookahead, expressions;
+
+        expr = isolateCoverGrammar(parseAssignmentExpression);
+
+        if (match(',')) {
+            expressions = [expr];
+
+            while (startIndex < length) {
+                if (!match(',')) {
+                    break;
+                }
+                lex();
+                expressions.push(isolateCoverGrammar(parseAssignmentExpression));
+            }
+
+            expr = new WrappingNode(startToken).finishSequenceExpression(expressions);
+        }
+
+        return expr;
+    }
+
+    // ECMA-262 13.2 Block
+
+    function parseStatementListItem() {
+        if (lookahead.type === Token.Keyword) {
+            switch (lookahead.value) {
+            case 'export':
+                if (state.sourceType !== 'module') {
+                    tolerateUnexpectedToken(lookahead, Messages.IllegalExportDeclaration);
+                }
+                return parseExportDeclaration();
+            case 'import':
+                if (state.sourceType !== 'module') {
+                    tolerateUnexpectedToken(lookahead, Messages.IllegalImportDeclaration);
+                }
+                return parseImportDeclaration();
+            case 'const':
+                return parseLexicalDeclaration({inFor: false});
+            case 'function':
+                return parseFunctionDeclaration(new Node());
+            case 'class':
+                return parseClassDeclaration();
+            }
+        }
+
+        if (matchKeyword('let') && isLexicalDeclaration()) {
+            return parseLexicalDeclaration({inFor: false});
+        }
+
+        return parseStatement();
+    }
+
+    function parseStatementList() {
+        var list = [];
+        while (startIndex < length) {
+            if (match('}')) {
+                break;
+            }
+            list.push(parseStatementListItem());
+        }
+
+        return list;
+    }
+
+    function parseBlock() {
+        var block, node = new Node();
+
+        expect('{');
+
+        block = parseStatementList();
+
+        expect('}');
+
+        return node.finishBlockStatement(block);
+    }
+
+    // ECMA-262 13.3.2 Variable Statement
+
+    function parseVariableIdentifier(kind) {
+        var token, node = new Node();
+
+        token = lex();
+
+        if (token.type === Token.Keyword && token.value === 'yield') {
+            if (strict) {
+                tolerateUnexpectedToken(token, Messages.StrictReservedWord);
+            } if (!state.allowYield) {
+                throwUnexpectedToken(token);
+            }
+        } else if (token.type !== Token.Identifier) {
+            if (strict && token.type === Token.Keyword && isStrictModeReservedWord(token.value)) {
+                tolerateUnexpectedToken(token, Messages.StrictReservedWord);
+            } else {
+                if (strict || token.value !== 'let' || kind !== 'var') {
+                    throwUnexpectedToken(token);
+                }
+            }
+        } else if (state.sourceType === 'module' && token.type === Token.Identifier && token.value === 'await') {
+            tolerateUnexpectedToken(token);
+        }
+
+        return node.finishIdentifier(token.value);
+    }
+
+    function parseVariableDeclaration(options) {
+        var init = null, id, node = new Node(), params = [];
+
+        id = parsePattern(params, 'var');
+
+        // ECMA-262 12.2.1
+        if (strict && isRestrictedWord(id.name)) {
+            tolerateError(Messages.StrictVarName);
+        }
+
+        if (match('=')) {
+            lex();
+            init = isolateCoverGrammar(parseAssignmentExpression);
+        } else if (id.type !== Syntax.Identifier && !options.inFor) {
+            expect('=');
+        }
+
+        return node.finishVariableDeclarator(id, init);
+    }
+
+    function parseVariableDeclarationList(options) {
+        var opt, list;
+
+        opt = { inFor: options.inFor };
+        list = [parseVariableDeclaration(opt)];
+
+        while (match(',')) {
+            lex();
+            list.push(parseVariableDeclaration(opt));
+        }
+
+        return list;
+    }
+
+    function parseVariableStatement(node) {
+        var declarations;
+
+        expectKeyword('var');
+
+        declarations = parseVariableDeclarationList({ inFor: false });
+
+        consumeSemicolon();
+
+        return node.finishVariableDeclaration(declarations);
+    }
+
+    // ECMA-262 13.3.1 Let and Const Declarations
+
+    function parseLexicalBinding(kind, options) {
+        var init = null, id, node = new Node(), params = [];
+
+        id = parsePattern(params, kind);
+
+        // ECMA-262 12.2.1
+        if (strict && id.type === Syntax.Identifier && isRestrictedWord(id.name)) {
+            tolerateError(Messages.StrictVarName);
+        }
+
+        if (kind === 'const') {
+            if (!matchKeyword('in') && !matchContextualKeyword('of')) {
+                expect('=');
+                init = isolateCoverGrammar(parseAssignmentExpression);
+            }
+        } else if ((!options.inFor && id.type !== Syntax.Identifier) || match('=')) {
+            expect('=');
+            init = isolateCoverGrammar(parseAssignmentExpression);
+        }
+
+        return node.finishVariableDeclarator(id, init);
+    }
+
+    function parseBindingList(kind, options) {
+        var list = [parseLexicalBinding(kind, options)];
+
+        while (match(',')) {
+            lex();
+            list.push(parseLexicalBinding(kind, options));
+        }
+
+        return list;
+    }
+
+
+    function tokenizerState() {
+        return {
+            index: index,
+            lineNumber: lineNumber,
+            lineStart: lineStart,
+            hasLineTerminator: hasLineTerminator,
+            lastIndex: lastIndex,
+            lastLineNumber: lastLineNumber,
+            lastLineStart: lastLineStart,
+            startIndex: startIndex,
+            startLineNumber: startLineNumber,
+            startLineStart: startLineStart,
+            lookahead: lookahead,
+            tokenCount: extra.tokens ? extra.tokens.length : 0
+        };
+    }
+
+    function resetTokenizerState(ts) {
+        index = ts.index;
+        lineNumber = ts.lineNumber;
+        lineStart = ts.lineStart;
+        hasLineTerminator = ts.hasLineTerminator;
+        lastIndex = ts.lastIndex;
+        lastLineNumber = ts.lastLineNumber;
+        lastLineStart = ts.lastLineStart;
+        startIndex = ts.startIndex;
+        startLineNumber = ts.startLineNumber;
+        startLineStart = ts.startLineStart;
+        lookahead = ts.lookahead;
+        if (extra.tokens) {
+            extra.tokens.splice(ts.tokenCount, extra.tokens.length);
+        }
+    }
+
+    function isLexicalDeclaration() {
+        var lexical, ts;
+
+        ts = tokenizerState();
+
+        lex();
+        lexical = (lookahead.type === Token.Identifier) || match('[') || match('{') ||
+            matchKeyword('let') || matchKeyword('yield');
+
+        resetTokenizerState(ts);
+
+        return lexical;
+    }
+
+    function parseLexicalDeclaration(options) {
+        var kind, declarations, node = new Node();
+
+        kind = lex().value;
+        assert(kind === 'let' || kind === 'const', 'Lexical declaration must be either let or const');
+
+        declarations = parseBindingList(kind, options);
+
+        consumeSemicolon();
+
+        return node.finishLexicalDeclaration(declarations, kind);
+    }
+
+    function parseRestElement(params) {
+        var param, node = new Node();
+
+        lex();
+
+        if (match('{')) {
+            throwError(Messages.ObjectPatternAsRestParameter);
+        }
+
+        params.push(lookahead);
+
+        param = parseVariableIdentifier();
+
+        if (match('=')) {
+            throwError(Messages.DefaultRestParameter);
+        }
+
+        if (!match(')')) {
+            throwError(Messages.ParameterAfterRestParameter);
+        }
+
+        return node.finishRestElement(param);
+    }
+
+    // ECMA-262 13.4 Empty Statement
+
+    function parseEmptyStatement(node) {
+        expect(';');
+        return node.finishEmptyStatement();
+    }
+
+    // ECMA-262 12.4 Expression Statement
+
+    function parseExpressionStatement(node) {
+        var expr = parseExpression();
+        consumeSemicolon();
+        return node.finishExpressionStatement(expr);
+    }
+
+    // ECMA-262 13.6 If statement
+
+    function parseIfStatement(node) {
+        var test, consequent, alternate;
+
+        expectKeyword('if');
+
+        expect('(');
+
+        test = parseExpression();
+
+        expect(')');
+
+        consequent = parseStatement();
+
+        if (matchKeyword('else')) {
+            lex();
+            alternate = parseStatement();
+        } else {
+            alternate = null;
+        }
+
+        return node.finishIfStatement(test, consequent, alternate);
+    }
+
+    // ECMA-262 13.7 Iteration Statements
+
+    function parseDoWhileStatement(node) {
+        var body, test, oldInIteration;
+
+        expectKeyword('do');
+
+        oldInIteration = state.inIteration;
+        state.inIteration = true;
+
+        body = parseStatement();
+
+        state.inIteration = oldInIteration;
+
+        expectKeyword('while');
+
+        expect('(');
+
+        test = parseExpression();
+
+        expect(')');
+
+        if (match(';')) {
+            lex();
+        }
+
+        return node.finishDoWhileStatement(body, test);
+    }
+
+    function parseWhileStatement(node) {
+        var test, body, oldInIteration;
+
+        expectKeyword('while');
+
+        expect('(');
+
+        test = parseExpression();
+
+        expect(')');
+
+        oldInIteration = state.inIteration;
+        state.inIteration = true;
+
+        body = parseStatement();
+
+        state.inIteration = oldInIteration;
+
+        return node.finishWhileStatement(test, body);
+    }
+
+    function parseForStatement(node) {
+        var init, forIn, initSeq, initStartToken, test, update, left, right, kind, declarations,
+            body, oldInIteration, previousAllowIn = state.allowIn;
+
+        init = test = update = null;
+        forIn = true;
+
+        expectKeyword('for');
+
+        expect('(');
+
+        if (match(';')) {
+            lex();
+        } else {
+            if (matchKeyword('var')) {
+                init = new Node();
+                lex();
+
+                state.allowIn = false;
+                declarations = parseVariableDeclarationList({ inFor: true });
+                state.allowIn = previousAllowIn;
+
+                if (declarations.length === 1 && matchKeyword('in')) {
+                    init = init.finishVariableDeclaration(declarations);
+                    lex();
+                    left = init;
+                    right = parseExpression();
+                    init = null;
+                } else if (declarations.length === 1 && declarations[0].init === null && matchContextualKeyword('of')) {
+                    init = init.finishVariableDeclaration(declarations);
+                    lex();
+                    left = init;
+                    right = parseAssignmentExpression();
+                    init = null;
+                    forIn = false;
+                } else {
+                    init = init.finishVariableDeclaration(declarations);
+                    expect(';');
+                }
+            } else if (matchKeyword('const') || matchKeyword('let')) {
+                init = new Node();
+                kind = lex().value;
+
+                if (!strict && lookahead.value === 'in') {
+                    init = init.finishIdentifier(kind);
+                    lex();
+                    left = init;
+                    right = parseExpression();
+                    init = null;
+                } else {
+                    state.allowIn = false;
+                    declarations = parseBindingList(kind, {inFor: true});
+                    state.allowIn = previousAllowIn;
+
+                    if (declarations.length === 1 && declarations[0].init === null && matchKeyword('in')) {
+                        init = init.finishLexicalDeclaration(declarations, kind);
+                        lex();
+                        left = init;
+                        right = parseExpression();
+                        init = null;
+                    } else if (declarations.length === 1 && declarations[0].init === null && matchContextualKeyword('of')) {
+                        init = init.finishLexicalDeclaration(declarations, kind);
+                        lex();
+                        left = init;
+                        right = parseAssignmentExpression();
+                        init = null;
+                        forIn = false;
+                    } else {
+                        consumeSemicolon();
+                        init = init.finishLexicalDeclaration(declarations, kind);
+                    }
+                }
+            } else {
+                initStartToken = lookahead;
+                state.allowIn = false;
+                init = inheritCoverGrammar(parseAssignmentExpression);
+                state.allowIn = previousAllowIn;
+
+                if (matchKeyword('in')) {
+                    if (!isAssignmentTarget) {
+                        tolerateError(Messages.InvalidLHSInForIn);
+                    }
+
+                    lex();
+                    reinterpretExpressionAsPattern(init);
+                    left = init;
+                    right = parseExpression();
+                    init = null;
+                } else if (matchContextualKeyword('of')) {
+                    if (!isAssignmentTarget) {
+                        tolerateError(Messages.InvalidLHSInForLoop);
+                    }
+
+                    lex();
+                    reinterpretExpressionAsPattern(init);
+                    left = init;
+                    right = parseAssignmentExpression();
+                    init = null;
+                    forIn = false;
+                } else {
+                    if (match(',')) {
+                        initSeq = [init];
+                        while (match(',')) {
+                            lex();
+                            initSeq.push(isolateCoverGrammar(parseAssignmentExpression));
+                        }
+                        init = new WrappingNode(initStartToken).finishSequenceExpression(initSeq);
+                    }
+                    expect(';');
+                }
+            }
+        }
+
+        if (typeof left === 'undefined') {
+
+            if (!match(';')) {
+                test = parseExpression();
+            }
+            expect(';');
+
+            if (!match(')')) {
+                update = parseExpression();
+            }
+        }
+
+        expect(')');
+
+        oldInIteration = state.inIteration;
+        state.inIteration = true;
+
+        body = isolateCoverGrammar(parseStatement);
+
+        state.inIteration = oldInIteration;
+
+        return (typeof left === 'undefined') ?
+                node.finishForStatement(init, test, update, body) :
+                forIn ? node.finishForInStatement(left, right, body) :
+                    node.finishForOfStatement(left, right, body);
+    }
+
+    // ECMA-262 13.8 The continue statement
+
+    function parseContinueStatement(node) {
+        var label = null, key;
+
+        expectKeyword('continue');
+
+        // Optimize the most common form: 'continue;'.
+        if (source.charCodeAt(startIndex) === 0x3B) {
+            lex();
+
+            if (!state.inIteration) {
+                throwError(Messages.IllegalContinue);
+            }
+
+            return node.finishContinueStatement(null);
+        }
+
+        if (hasLineTerminator) {
+            if (!state.inIteration) {
+                throwError(Messages.IllegalContinue);
+            }
+
+            return node.finishContinueStatement(null);
+        }
+
+        if (lookahead.type === Token.Identifier) {
+            label = parseVariableIdentifier();
+
+            key = '$' + label.name;
+            if (!Object.prototype.hasOwnProperty.call(state.labelSet, key)) {
+                throwError(Messages.UnknownLabel, label.name);
+            }
+        }
+
+        consumeSemicolon();
+
+        if (label === null && !state.inIteration) {
+            throwError(Messages.IllegalContinue);
+        }
+
+        return node.finishContinueStatement(label);
+    }
+
+    // ECMA-262 13.9 The break statement
+
+    function parseBreakStatement(node) {
+        var label = null, key;
+
+        expectKeyword('break');
+
+        // Catch the very common case first: immediately a semicolon (U+003B).
+        if (source.charCodeAt(lastIndex) === 0x3B) {
+            lex();
+
+            if (!(state.inIteration || state.inSwitch)) {
+                throwError(Messages.IllegalBreak);
+            }
+
+            return node.finishBreakStatement(null);
+        }
+
+        if (hasLineTerminator) {
+            if (!(state.inIteration || state.inSwitch)) {
+                throwError(Messages.IllegalBreak);
+            }
+        } else if (lookahead.type === Token.Identifier) {
+            label = parseVariableIdentifier();
+
+            key = '$' + 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 node.finishBreakStatement(label);
+    }
+
+    // ECMA-262 13.10 The return statement
+
+    function parseReturnStatement(node) {
+        var argument = null;
+
+        expectKeyword('return');
+
+        if (!state.inFunctionBody) {
+            tolerateError(Messages.IllegalReturn);
+        }
+
+        // 'return' followed by a space and an identifier is very common.
+        if (source.charCodeAt(lastIndex) === 0x20) {
+            if (isIdentifierStart(source.charCodeAt(lastIndex + 1))) {
+                argument = parseExpression();
+                consumeSemicolon();
+                return node.finishReturnStatement(argument);
+            }
+        }
+
+        if (hasLineTerminator) {
+            // HACK
+            return node.finishReturnStatement(null);
+        }
+
+        if (!match(';')) {
+            if (!match('}') && lookahead.type !== Token.EOF) {
+                argument = parseExpression();
+            }
+        }
+
+        consumeSemicolon();
+
+        return node.finishReturnStatement(argument);
+    }
+
+    // ECMA-262 13.11 The with statement
+
+    function parseWithStatement(node) {
+        var object, body;
+
+        if (strict) {
+            tolerateError(Messages.StrictModeWith);
+        }
+
+        expectKeyword('with');
+
+        expect('(');
+
+        object = parseExpression();
+
+        expect(')');
+
+        body = parseStatement();
+
+        return node.finishWithStatement(object, body);
+    }
+
+    // ECMA-262 13.12 The switch statement
+
+    function parseSwitchCase() {
+        var test, consequent = [], statement, node = new Node();
+
+        if (matchKeyword('default')) {
+            lex();
+            test = null;
+        } else {
+            expectKeyword('case');
+            test = parseExpression();
+        }
+        expect(':');
+
+        while (startIndex < length) {
+            if (match('}') || matchKeyword('default') || matchKeyword('case')) {
+                break;
+            }
+            statement = parseStatementListItem();
+            consequent.push(statement);
+        }
+
+        return node.finishSwitchCase(test, consequent);
+    }
+
+    function parseSwitchStatement(node) {
+        var discriminant, cases, clause, oldInSwitch, defaultFound;
+
+        expectKeyword('switch');
+
+        expect('(');
+
+        discriminant = parseExpression();
+
+        expect(')');
+
+        expect('{');
+
+        cases = [];
+
+        if (match('}')) {
+            lex();
+            return node.finishSwitchStatement(discriminant, cases);
+        }
+
+        oldInSwitch = state.inSwitch;
+        state.inSwitch = true;
+        defaultFound = false;
+
+        while (startIndex < 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 node.finishSwitchStatement(discriminant, cases);
+    }
+
+    // ECMA-262 13.14 The throw statement
+
+    function parseThrowStatement(node) {
+        var argument;
+
+        expectKeyword('throw');
+
+        if (hasLineTerminator) {
+            throwError(Messages.NewlineAfterThrow);
+        }
+
+        argument = parseExpression();
+
+        consumeSemicolon();
+
+        return node.finishThrowStatement(argument);
+    }
+
+    // ECMA-262 13.15 The try statement
+
+    function parseCatchClause() {
+        var param, params = [], paramMap = {}, key, i, body, node = new Node();
+
+        expectKeyword('catch');
+
+        expect('(');
+        if (match(')')) {
+            throwUnexpectedToken(lookahead);
+        }
+
+        param = parsePattern(params);
+        for (i = 0; i < params.length; i++) {
+            key = '$' + params[i].value;
+            if (Object.prototype.hasOwnProperty.call(paramMap, key)) {
+                tolerateError(Messages.DuplicateBinding, params[i].value);
+            }
+            paramMap[key] = true;
+        }
+
+        // ECMA-262 12.14.1
+        if (strict && isRestrictedWord(param.name)) {
+            tolerateError(Messages.StrictCatchVariable);
+        }
+
+        expect(')');
+        body = parseBlock();
+        return node.finishCatchClause(param, body);
+    }
+
+    function parseTryStatement(node) {
+        var block, handler = null, finalizer = null;
+
+        expectKeyword('try');
+
+        block = parseBlock();
+
+        if (matchKeyword('catch')) {
+            handler = parseCatchClause();
+        }
+
+        if (matchKeyword('finally')) {
+            lex();
+            finalizer = parseBlock();
+        }
+
+        if (!handler && !finalizer) {
+            throwError(Messages.NoCatchOrFinally);
+        }
+
+        return node.finishTryStatement(block, handler, finalizer);
+    }
+
+    // ECMA-262 13.16 The debugger statement
+
+    function parseDebuggerStatement(node) {
+        expectKeyword('debugger');
+
+        consumeSemicolon();
+
+        return node.finishDebuggerStatement();
+    }
+
+    // 13 Statements
+
+    function parseStatement() {
+        var type = lookahead.type,
+            expr,
+            labeledBody,
+            key,
+            node;
+
+        if (type === Token.EOF) {
+            throwUnexpectedToken(lookahead);
+        }
+
+        if (type === Token.Punctuator && lookahead.value === '{') {
+            return parseBlock();
+        }
+        isAssignmentTarget = isBindingElement = true;
+        node = new Node();
+
+        if (type === Token.Punctuator) {
+            switch (lookahead.value) {
+            case ';':
+                return parseEmptyStatement(node);
+            case '(':
+                return parseExpressionStatement(node);
+            default:
+                break;
+            }
+        } else if (type === Token.Keyword) {
+            switch (lookahead.value) {
+            case 'break':
+                return parseBreakStatement(node);
+            case 'continue':
+                return parseContinueStatement(node);
+            case 'debugger':
+                return parseDebuggerStatement(node);
+            case 'do':
+                return parseDoWhileStatement(node);
+            case 'for':
+                return parseForStatement(node);
+            case 'function':
+                return parseFunctionDeclaration(node);
+            case 'if':
+                return parseIfStatement(node);
+            case 'return':
+                return parseReturnStatement(node);
+            case 'switch':
+                return parseSwitchStatement(node);
+            case 'throw':
+                return parseThrowStatement(node);
+            case 'try':
+                return parseTryStatement(node);
+            case 'var':
+                return parseVariableStatement(node);
+            case 'while':
+                return parseWhileStatement(node);
+            case 'with':
+                return parseWithStatement(node);
+            default:
+                break;
+            }
+        }
+
+        expr = parseExpression();
+
+        // ECMA-262 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 node.finishLabeledStatement(expr, labeledBody);
+        }
+
+        consumeSemicolon();
+
+        return node.finishExpressionStatement(expr);
+    }
+
+    // ECMA-262 14.1 Function Definition
+
+    function parseFunctionSourceElements() {
+        var statement, body = [], token, directive, firstRestricted,
+            oldLabelSet, oldInIteration, oldInSwitch, oldInFunctionBody,
+            node = new Node();
+
+        expect('{');
+
+        while (startIndex < length) {
+            if (lookahead.type !== Token.StringLiteral) {
+                break;
+            }
+            token = lookahead;
+
+            statement = parseStatementListItem();
+            body.push(statement);
+            if (statement.expression.type !== Syntax.Literal) {
+                // this is not directive
+                break;
+            }
+            directive = source.slice(token.start + 1, token.end - 1);
+            if (directive === 'use strict') {
+                strict = true;
+                if (firstRestricted) {
+                    tolerateUnexpectedToken(firstRestricted, Messages.StrictOctalLiteral);
+                }
+            } else {
+                if (!firstRestricted && token.octal) {
+                    firstRestricted = token;
+                }
+            }
+        }
+
+        oldLabelSet = state.labelSet;
+        oldInIteration = state.inIteration;
+        oldInSwitch = state.inSwitch;
+        oldInFunctionBody = state.inFunctionBody;
+
+        state.labelSet = {};
+        state.inIteration = false;
+        state.inSwitch = false;
+        state.inFunctionBody = true;
+
+        while (startIndex < length) {
+            if (match('}')) {
+                break;
+            }
+            body.push(parseStatementListItem());
+        }
+
+        expect('}');
+
+        state.labelSet = oldLabelSet;
+        state.inIteration = oldInIteration;
+        state.inSwitch = oldInSwitch;
+        state.inFunctionBody = oldInFunctionBody;
+
+        return node.finishBlockStatement(body);
+    }
+
+    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.stricted = param;
+                options.message = Messages.StrictParamDupe;
+            }
+        }
+        options.paramSet[key] = true;
+    }
+
+    function parseParam(options) {
+        var token, param, params = [], i, def;
+
+        token = lookahead;
+        if (token.value === '...') {
+            param = parseRestElement(params);
+            validateParam(options, param.argument, param.argument.name);
+            options.params.push(param);
+            options.defaults.push(null);
+            return false;
+        }
+
+        param = parsePatternWithDefault(params);
+        for (i = 0; i < params.length; i++) {
+            validateParam(options, params[i], params[i].value);
+        }
+
+        if (param.type === Syntax.AssignmentPattern) {
+            def = param.right;
+            param = param.left;
+            ++options.defaultCount;
+        }
+
+        options.params.push(param);
+        options.defaults.push(def);
+
+        return !match(')');
+    }
+
+    function parseParams(firstRestricted) {
+        var options;
+
+        options = {
+            params: [],
+            defaultCount: 0,
+            defaults: [],
+            firstRestricted: firstRestricted
+        };
+
+        expect('(');
+
+        if (!match(')')) {
+            options.paramSet = {};
+            while (startIndex < length) {
+                if (!parseParam(options)) {
+                    break;
+                }
+                expect(',');
+            }
+        }
+
+        expect(')');
+
+        if (options.defaultCount === 0) {
+            options.defaults = [];
+        }
+
+        return {
+            params: options.params,
+            defaults: options.defaults,
+            stricted: options.stricted,
+            firstRestricted: options.firstRestricted,
+            message: options.message
+        };
+    }
+
+    function parseFunctionDeclaration(node, identifierIsOptional) {
+        var id = null, params = [], defaults = [], body, token, stricted, tmp, firstRestricted, message, previousStrict,
+            isGenerator, previousAllowYield;
+
+        previousAllowYield = state.allowYield;
+
+        expectKeyword('function');
+
+        isGenerator = match('*');
+        if (isGenerator) {
+            lex();
+        }
+
+        if (!identifierIsOptional || !match('(')) {
+            token = lookahead;
+            id = parseVariableIdentifier();
+            if (strict) {
+                if (isRestrictedWord(token.value)) {
+                    tolerateUnexpectedToken(token, Messages.StrictFunctionName);
+                }
+            } else {
+                if (isRestrictedWord(token.value)) {
+                    firstRestricted = token;
+                    message = Messages.StrictFunctionName;
+                } else if (isStrictModeReservedWord(token.value)) {
+                    firstRestricted = token;
+                    message = Messages.StrictReservedWord;
+                }
+            }
+        }
+
+        state.allowYield = !isGenerator;
+        tmp = parseParams(firstRestricted);
+        params = tmp.params;
+        defaults = tmp.defaults;
+        stricted = tmp.stricted;
+        firstRestricted = tmp.firstRestricted;
+        if (tmp.message) {
+            message = tmp.message;
+        }
+
+
+        previousStrict = strict;
+        body = parseFunctionSourceElements();
+        if (strict && firstRestricted) {
+            throwUnexpectedToken(firstRestricted, message);
+        }
+        if (strict && stricted) {
+            tolerateUnexpectedToken(stricted, message);
+        }
+
+        strict = previousStrict;
+        state.allowYield = previousAllowYield;
+
+        return node.finishFunctionDeclaration(id, params, defaults, body, isGenerator);
+    }
+
+    function parseFunctionExpression() {
+        var token, id = null, stricted, firstRestricted, message, tmp,
+            params = [], defaults = [], body, previousStrict, node = new Node(),
+            isGenerator, previousAllowYield;
+
+        previousAllowYield = state.allowYield;
+
+        expectKeyword('function');
+
+        isGenerator = match('*');
+        if (isGenerator) {
+            lex();
+        }
+
+        state.allowYield = !isGenerator;
+        if (!match('(')) {
+            token = lookahead;
+            id = (!strict && !isGenerator && matchKeyword('yield')) ? parseNonComputedProperty() : parseVariableIdentifier();
+            if (strict) {
+                if (isRestrictedWord(token.value)) {
+                    tolerateUnexpectedToken(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);
+        params = tmp.params;
+        defaults = tmp.defaults;
+        stricted = tmp.stricted;
+        firstRestricted = tmp.firstRestricted;
+        if (tmp.message) {
+            message = tmp.message;
+        }
+
+        previousStrict = strict;
+        body = parseFunctionSourceElements();
+        if (strict && firstRestricted) {
+            throwUnexpectedToken(firstRestricted, message);
+        }
+        if (strict && stricted) {
+            tolerateUnexpectedToken(stricted, message);
+        }
+        strict = previousStrict;
+        state.allowYield = previousAllowYield;
+
+        return node.finishFunctionExpression(id, params, defaults, body, isGenerator);
+    }
+
+    // ECMA-262 14.5 Class Definitions
+
+    function parseClassBody() {
+        var classBody, token, isStatic, hasConstructor = false, body, method, computed, key;
+
+        classBody = new Node();
+
+        expect('{');
+        body = [];
+        while (!match('}')) {
+            if (match(';')) {
+                lex();
+            } else {
+                method = new Node();
+                token = lookahead;
+                isStatic = false;
+                computed = match('[');
+                if (match('*')) {
+                    lex();
+                } else {
+                    key = parseObjectPropertyKey();
+                    if (key.name === 'static' && (lookaheadPropertyName() || match('*'))) {
+                        token = lookahead;
+                        isStatic = true;
+                        computed = match('[');
+                        if (match('*')) {
+                            lex();
+                        } else {
+                            key = parseObjectPropertyKey();
+                        }
+                    }
+                }
+                method = tryParseMethodDefinition(token, key, computed, method);
+                if (method) {
+                    method['static'] = isStatic; // jscs:ignore requireDotNotation
+                    if (method.kind === 'init') {
+                        method.kind = 'method';
+                    }
+                    if (!isStatic) {
+                        if (!method.computed && (method.key.name || method.key.value.toString()) === 'constructor') {
+                            if (method.kind !== 'method' || !method.method || method.value.generator) {
+                                throwUnexpectedToken(token, Messages.ConstructorSpecialMethod);
+                            }
+                            if (hasConstructor) {
+                                throwUnexpectedToken(token, Messages.DuplicateConstructor);
+                            } else {
+                                hasConstructor = true;
+                            }
+                            method.kind = 'constructor';
+                        }
+                    } else {
+                        if (!method.computed && (method.key.name || method.key.value.toString()) === 'prototype') {
+                            throwUnexpectedToken(token, Messages.StaticPrototype);
+                        }
+                    }
+                    method.type = Syntax.MethodDefinition;
+                    delete method.method;
+                    delete method.shorthand;
+                    body.push(method);
+                } else {
+                    throwUnexpectedToken(lookahead);
+                }
+            }
+        }
+        lex();
+        return classBody.finishClassBody(body);
+    }
+
+    function parseClassDeclaration(identifierIsOptional) {
+        var id = null, superClass = null, classNode = new Node(), classBody, previousStrict = strict;
+        strict = true;
+
+        expectKeyword('class');
+
+        if (!identifierIsOptional || lookahead.type === Token.Identifier) {
+            id = parseVariableIdentifier();
+        }
+
+        if (matchKeyword('extends')) {
+            lex();
+            superClass = isolateCoverGrammar(parseLeftHandSideExpressionAllowCall);
+        }
+        classBody = parseClassBody();
+        strict = previousStrict;
+
+        return classNode.finishClassDeclaration(id, superClass, classBody);
+    }
+
+    function parseClassExpression() {
+        var id = null, superClass = null, classNode = new Node(), classBody, previousStrict = strict;
+        strict = true;
+
+        expectKeyword('class');
+
+        if (lookahead.type === Token.Identifier) {
+            id = parseVariableIdentifier();
+        }
+
+        if (matchKeyword('extends')) {
+            lex();
+            superClass = isolateCoverGrammar(parseLeftHandSideExpressionAllowCall);
+        }
+        classBody = parseClassBody();
+        strict = previousStrict;
+
+        return classNode.finishClassExpression(id, superClass, classBody);
+    }
+
+    // ECMA-262 15.2 Modules
+
+    function parseModuleSpecifier() {
+        var node = new Node();
+
+        if (lookahead.type !== Token.StringLiteral) {
+            throwError(Messages.InvalidModuleSpecifier);
+        }
+        return node.finishLiteral(lex());
+    }
+
+    // ECMA-262 15.2.3 Exports
+
+    function parseExportSpecifier() {
+        var exported, local, node = new Node(), def;
+        if (matchKeyword('default')) {
+            // export {default} from 'something';
+            def = new Node();
+            lex();
+            local = def.finishIdentifier('default');
+        } else {
+            local = parseVariableIdentifier();
+        }
+        if (matchContextualKeyword('as')) {
+            lex();
+            exported = parseNonComputedProperty();
+        }
+        return node.finishExportSpecifier(local, exported);
+    }
+
+    function parseExportNamedDeclaration(node) {
+        var declaration = null,
+            isExportFromIdentifier,
+            src = null, specifiers = [];
+
+        // non-default export
+        if (lookahead.type === Token.Keyword) {
+            // covers:
+            // export var f = 1;
+            switch (lookahead.value) {
+                case 'let':
+                case 'const':
+                    declaration = parseLexicalDeclaration({inFor: false});
+                    return node.finishExportNamedDeclaration(declaration, specifiers, null);
+                case 'var':
+                case 'class':
+                case 'function':
+                    declaration = parseStatementListItem();
+                    return node.finishExportNamedDeclaration(declaration, specifiers, null);
+            }
+        }
+
+        expect('{');
+        while (!match('}')) {
+            isExportFromIdentifier = isExportFromIdentifier || matchKeyword('default');
+            specifiers.push(parseExportSpecifier());
+            if (!match('}')) {
+                expect(',');
+                if (match('}')) {
+                    break;
+                }
+            }
+        }
+        expect('}');
+
+        if (matchContextualKeyword('from')) {
+            // covering:
+            // export {default} from 'foo';
+            // export {foo} from 'foo';
+            lex();
+            src = parseModuleSpecifier();
+            consumeSemicolon();
+        } else if (isExportFromIdentifier) {
+            // covering:
+            // export {default}; // missing fromClause
+            throwError(lookahead.value ?
+                    Messages.UnexpectedToken : Messages.MissingFromClause, lookahead.value);
+        } else {
+            // cover
+            // export {foo};
+            consumeSemicolon();
+        }
+        return node.finishExportNamedDeclaration(declaration, specifiers, src);
+    }
+
+    function parseExportDefaultDeclaration(node) {
+        var declaration = null,
+            expression = null;
+
+        // covers:
+        // export default ...
+        expectKeyword('default');
+
+        if (matchKeyword('function')) {
+            // covers:
+            // export default function foo () {}
+            // export default function () {}
+            declaration = parseFunctionDeclaration(new Node(), true);
+            return node.finishExportDefaultDeclaration(declaration);
+        }
+        if (matchKeyword('class')) {
+            declaration = parseClassDeclaration(true);
+            return node.finishExportDefaultDeclaration(declaration);
+        }
+
+        if (matchContextualKeyword('from')) {
+            throwError(Messages.UnexpectedToken, lookahead.value);
+        }
+
+        // covers:
+        // export default {};
+        // export default [];
+        // export default (1 + 2);
+        if (match('{')) {
+            expression = parseObjectInitializer();
+        } else if (match('[')) {
+            expression = parseArrayInitializer();
+        } else {
+            expression = parseAssignmentExpression();
+        }
+        consumeSemicolon();
+        return node.finishExportDefaultDeclaration(expression);
+    }
+
+    function parseExportAllDeclaration(node) {
+        var src;
+
+        // covers:
+        // export * from 'foo';
+        expect('*');
+        if (!matchContextualKeyword('from')) {
+            throwError(lookahead.value ?
+                    Messages.UnexpectedToken : Messages.MissingFromClause, lookahead.value);
+        }
+        lex();
+        src = parseModuleSpecifier();
+        consumeSemicolon();
+
+        return node.finishExportAllDeclaration(src);
+    }
+
+    function parseExportDeclaration() {
+        var node = new Node();
+        if (state.inFunctionBody) {
+            throwError(Messages.IllegalExportDeclaration);
+        }
+
+        expectKeyword('export');
+
+        if (matchKeyword('default')) {
+            return parseExportDefaultDeclaration(node);
+        }
+        if (match('*')) {
+            return parseExportAllDeclaration(node);
+        }
+        return parseExportNamedDeclaration(node);
+    }
+
+    // ECMA-262 15.2.2 Imports
+
+    function parseImportSpecifier() {
+        // import {<foo as bar>} ...;
+        var local, imported, node = new Node();
+
+        imported = parseNonComputedProperty();
+        if (matchContextualKeyword('as')) {
+            lex();
+            local = parseVariableIdentifier();
+        }
+
+        return node.finishImportSpecifier(local, imported);
+    }
+
+    function parseNamedImports() {
+        var specifiers = [];
+        // {foo, bar as bas}
+        expect('{');
+        while (!match('}')) {
+            specifiers.push(parseImportSpecifier());
+            if (!match('}')) {
+                expect(',');
+                if (match('}')) {
+                    break;
+                }
+            }
+        }
+        expect('}');
+        return specifiers;
+    }
+
+    function parseImportDefaultSpecifier() {
+        // import <foo> ...;
+        var local, node = new Node();
+
+        local = parseNonComputedProperty();
+
+        return node.finishImportDefaultSpecifier(local);
+    }
+
+    function parseImportNamespaceSpecifier() {
+        // import <* as foo> ...;
+        var local, node = new Node();
+
+        expect('*');
+        if (!matchContextualKeyword('as')) {
+            throwError(Messages.NoAsAfterImportNamespace);
+        }
+        lex();
+        local = parseNonComputedProperty();
+
+        return node.finishImportNamespaceSpecifier(local);
+    }
+
+    function parseImportDeclaration() {
+        var specifiers = [], src, node = new Node();
+
+        if (state.inFunctionBody) {
+            throwError(Messages.IllegalImportDeclaration);
+        }
+
+        expectKeyword('import');
+
+        if (lookahead.type === Token.StringLiteral) {
+            // import 'foo';
+            src = parseModuleSpecifier();
+        } else {
+
+            if (match('{')) {
+                // import {bar}
+                specifiers = specifiers.concat(parseNamedImports());
+            } else if (match('*')) {
+                // import * as foo
+                specifiers.push(parseImportNamespaceSpecifier());
+            } else if (isIdentifierName(lookahead) && !matchKeyword('default')) {
+                // import foo
+                specifiers.push(parseImportDefaultSpecifier());
+                if (match(',')) {
+                    lex();
+                    if (match('*')) {
+                        // import foo, * as foo
+                        specifiers.push(parseImportNamespaceSpecifier());
+                    } else if (match('{')) {
+                        // import foo, {bar}
+                        specifiers = specifiers.concat(parseNamedImports());
+                    } else {
+                        throwUnexpectedToken(lookahead);
+                    }
+                }
+            } else {
+                throwUnexpectedToken(lex());
+            }
+
+            if (!matchContextualKeyword('from')) {
+                throwError(lookahead.value ?
+                        Messages.UnexpectedToken : Messages.MissingFromClause, lookahead.value);
+            }
+            lex();
+            src = parseModuleSpecifier();
+        }
+
+        consumeSemicolon();
+        return node.finishImportDeclaration(specifiers, src);
+    }
+
+    // ECMA-262 15.1 Scripts
+
+    function parseScriptBody() {
+        var statement, body = [], token, directive, firstRestricted;
+
+        while (startIndex < length) {
+            token = lookahead;
+            if (token.type !== Token.StringLiteral) {
+                break;
+            }
+
+            statement = parseStatementListItem();
+            body.push(statement);
+            if (statement.expression.type !== Syntax.Literal) {
+                // this is not directive
+                break;
+            }
+            directive = source.slice(token.start + 1, token.end - 1);
+            if (directive === 'use strict') {
+                strict = true;
+                if (firstRestricted) {
+                    tolerateUnexpectedToken(firstRestricted, Messages.StrictOctalLiteral);
+                }
+            } else {
+                if (!firstRestricted && token.octal) {
+                    firstRestricted = token;
+                }
+            }
+        }
+
+        while (startIndex < length) {
+            statement = parseStatementListItem();
+            /* istanbul ignore if */
+            if (typeof statement === 'undefined') {
+                break;
+            }
+            body.push(statement);
+        }
+        return body;
+    }
+
+    function parseProgram() {
+        var body, node;
+
+        peek();
+        node = new Node();
+
+        body = parseScriptBody();
+        return node.finishProgram(body, state.sourceType);
+    }
+
+    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 (entry.regex) {
+                token.regex = {
+                    pattern: entry.regex.pattern,
+                    flags: entry.regex.flags
+                };
+            }
+            if (extra.range) {
+                token.range = entry.range;
+            }
+            if (extra.loc) {
+                token.loc = entry.loc;
+            }
+            tokens.push(token);
+        }
+
+        extra.tokens = tokens;
+    }
+
+    function tokenize(code, options, delegate) {
+        var toString,
+            tokens;
+
+        toString = String;
+        if (typeof code !== 'string' && !(code instanceof String)) {
+            code = toString(code);
+        }
+
+        source = code;
+        index = 0;
+        lineNumber = (source.length > 0) ? 1 : 0;
+        lineStart = 0;
+        startIndex = index;
+        startLineNumber = lineNumber;
+        startLineStart = lineStart;
+        length = source.length;
+        lookahead = null;
+        state = {
+            allowIn: true,
+            allowYield: true,
+            labelSet: {},
+            inFunctionBody: false,
+            inIteration: false,
+            inSwitch: false,
+            lastCommentStart: -1,
+            curlyStack: []
+        };
+
+        extra = {};
+
+        // Options matching.
+        options = options || {};
+
+        // Of course we collect tokens here.
+        options.tokens = true;
+        extra.tokens = [];
+        extra.tokenValues = [];
+        extra.tokenize = true;
+        extra.delegate = delegate;
+
+        // 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 = [];
+        }
+
+        try {
+            peek();
+            if (lookahead.type === Token.EOF) {
+                return extra.tokens;
+            }
+
+            lex();
+            while (lookahead.type !== Token.EOF) {
+                try {
+                    lex();
+                } catch (lexError) {
+                    if (extra.errors) {
+                        recordError(lexError);
+                        // We have to break on the first error
+                        // to avoid infinite loops.
+                        break;
+                    } else {
+                        throw lexError;
+                    }
+                }
+            }
+
+            tokens = extra.tokens;
+            if (typeof extra.errors !== 'undefined') {
+                tokens.errors = extra.errors;
+            }
+        } catch (e) {
+            throw e;
+        } finally {
+            extra = {};
+        }
+        return tokens;
+    }
+
+    function parse(code, options) {
+        var program, toString;
+
+        toString = String;
+        if (typeof code !== 'string' && !(code instanceof String)) {
+            code = toString(code);
+        }
+
+        source = code;
+        index = 0;
+        lineNumber = (source.length > 0) ? 1 : 0;
+        lineStart = 0;
+        startIndex = index;
+        startLineNumber = lineNumber;
+        startLineStart = lineStart;
+        length = source.length;
+        lookahead = null;
+        state = {
+            allowIn: true,
+            allowYield: true,
+            labelSet: {},
+            inFunctionBody: false,
+            inIteration: false,
+            inSwitch: false,
+            lastCommentStart: -1,
+            curlyStack: [],
+            sourceType: 'script'
+        };
+        strict = false;
+
+        extra = {};
+        if (typeof options !== 'undefined') {
+            extra.range = (typeof options.range === 'boolean') && options.range;
+            extra.loc = (typeof options.loc === 'boolean') && options.loc;
+            extra.attachComment = (typeof options.attachComment === 'boolean') && options.attachComment;
+
+            if (extra.loc && options.source !== null && options.source !== undefined) {
+                extra.source = toString(options.source);
+            }
+
+            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 (extra.attachComment) {
+                extra.range = true;
+                extra.comments = [];
+                extra.bottomRightStack = [];
+                extra.trailingComments = [];
+                extra.leadingComments = [];
+            }
+            if (options.sourceType === 'module') {
+                // very restrictive condition for now
+                state.sourceType = options.sourceType;
+                strict = true;
+            }
+        }
+
+        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 {
+            extra = {};
+        }
+
+        return program;
+    }
+
+    // Sync with *.json manifests.
+    exports.version = '2.7.2';
+
+    exports.tokenize = tokenize;
+
+    exports.parse = parse;
+
+    // Deep copy.
+    /* istanbul ignore next */
+    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 : */
diff --git a/tools/doc/node_modules/esprima/package.json b/tools/doc/node_modules/esprima/package.json
new file mode 100644
index 00000000000000..c0dbf8b281896d
--- /dev/null
+++ b/tools/doc/node_modules/esprima/package.json
@@ -0,0 +1,152 @@
+{
+  "_args": [
+    [
+      {
+        "name": "esprima",
+        "raw": "esprima@^2.6.0",
+        "rawSpec": "^2.6.0",
+        "scope": null,
+        "spec": ">=2.6.0 <3.0.0",
+        "type": "range"
+      },
+      "/Users/svairamani/git/node/tools/doc/node_modules/js-yaml"
+    ]
+  ],
+  "_from": "esprima@>=2.6.0 <3.0.0",
+  "_id": "esprima@2.7.2",
+  "_inCache": true,
+  "_installable": true,
+  "_location": "/esprima",
+  "_nodeVersion": "4.2.2",
+  "_npmOperationalInternal": {
+    "host": "packages-9-west.internal.npmjs.com",
+    "tmp": "tmp/esprima-2.7.2.tgz_1454477276067_0.014412595424801111"
+  },
+  "_npmUser": {
+    "email": "ariya.hidayat@gmail.com",
+    "name": "ariya"
+  },
+  "_npmVersion": "2.14.7",
+  "_phantomChildren": {},
+  "_requested": {
+    "name": "esprima",
+    "raw": "esprima@^2.6.0",
+    "rawSpec": "^2.6.0",
+    "scope": null,
+    "spec": ">=2.6.0 <3.0.0",
+    "type": "range"
+  },
+  "_requiredBy": [
+    "/js-yaml"
+  ],
+  "_resolved": "http://npm.paypal.com/esprima/-/esprima-2.7.2.tgz",
+  "_shasum": "f43be543609984eae44c933ac63352a6af35f339",
+  "_shrinkwrap": null,
+  "_spec": "esprima@^2.6.0",
+  "_where": "/Users/svairamani/git/node/tools/doc/node_modules/js-yaml",
+  "author": {
+    "email": "ariya.hidayat@gmail.com",
+    "name": "Ariya Hidayat"
+  },
+  "bin": {
+    "esparse": "./bin/esparse.js",
+    "esvalidate": "./bin/esvalidate.js"
+  },
+  "bugs": {
+    "url": "https://github.com/jquery/esprima/issues"
+  },
+  "dependencies": {},
+  "description": "ECMAScript parsing infrastructure for multipurpose analysis",
+  "devDependencies": {
+    "codecov.io": "~0.1.6",
+    "escomplex-js": "1.2.0",
+    "eslint": "~1.7.2",
+    "everything.js": "~1.0.3",
+    "glob": "^5.0.15",
+    "istanbul": "~0.4.0",
+    "jscs": "~2.3.5",
+    "json-diff": "~0.3.1",
+    "karma": "^0.13.11",
+    "karma-chrome-launcher": "^0.2.1",
+    "karma-detect-browsers": "^2.0.2",
+    "karma-firefox-launcher": "^0.1.6",
+    "karma-ie-launcher": "^0.2.0",
+    "karma-mocha": "^0.2.0",
+    "karma-safari-launcher": "^0.1.1",
+    "karma-sauce-launcher": "^0.2.14",
+    "lodash": "^3.10.0",
+    "mocha": "^2.3.3",
+    "node-tick-processor": "~0.0.2",
+    "regenerate": "~1.2.1",
+    "temp": "~0.8.3",
+    "unicode-7.0.0": "~0.1.5"
+  },
+  "directories": {},
+  "dist": {
+    "shasum": "f43be543609984eae44c933ac63352a6af35f339",
+    "tarball": "http://npm.paypal.com/esprima/-/esprima-2.7.2.tgz"
+  },
+  "engines": {
+    "node": ">=0.10.0"
+  },
+  "files": [
+    "bin",
+    "unit-tests.js",
+    "esprima.js"
+  ],
+  "gitHead": "eb05a03b18b8433ab1ebeabea635a949219cd75e",
+  "homepage": "http://esprima.org",
+  "keywords": [
+    "ast",
+    "ecmascript",
+    "javascript",
+    "parser",
+    "syntax"
+  ],
+  "license": "BSD-2-Clause",
+  "main": "esprima.js",
+  "maintainers": [
+    {
+      "email": "ariya.hidayat@gmail.com",
+      "name": "ariya"
+    }
+  ],
+  "name": "esprima",
+  "optionalDependencies": {},
+  "readme": "ERROR: No README data found!",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/jquery/esprima.git"
+  },
+  "scripts": {
+    "all-tests": "npm run generate-fixtures && npm run unit-tests && npm run grammar-tests && npm run regression-tests",
+    "analyze-coverage": "istanbul cover test/unit-tests.js",
+    "appveyor": "npm run all-tests && npm run browser-tests && npm run dynamic-analysis",
+    "benchmark": "node test/benchmarks.js",
+    "benchmark-quick": "node test/benchmarks.js quick",
+    "browser-tests": "npm run generate-fixtures && cd test && karma start --single-run",
+    "check-coverage": "istanbul check-coverage --statement 100 --branch 100 --function 100",
+    "check-version": "node test/check-version.js",
+    "circleci": "npm test && npm run codecov && npm run downstream",
+    "codecov": "istanbul report cobertura && codecov < ./coverage/cobertura-coverage.xml",
+    "complexity": "node test/check-complexity.js",
+    "downstream": "node test/downstream.js",
+    "droneio": "npm test && npm run saucelabs-evergreen && npm run saucelabs-ie && npm run saucelabs-safari",
+    "dynamic-analysis": "npm run analyze-coverage && npm run check-coverage",
+    "eslint": "node node_modules/eslint/bin/eslint.js -c .lintrc esprima.js",
+    "generate-fixtures": "node tools/generate-fixtures.js",
+    "generate-regex": "node tools/generate-identifier-regex.js",
+    "grammar-tests": "node test/grammar-tests.js",
+    "jscs": "jscs -p crockford esprima.js && jscs -p crockford test/*.js",
+    "profile": "node --prof test/profile.js && mv isolate*.log v8.log && node-tick-processor",
+    "regression-tests": "node test/regression-tests.js",
+    "saucelabs-evergreen": "cd test && karma start saucelabs-evergreen.conf.js",
+    "saucelabs-ie": "cd test && karma start saucelabs-ie.conf.js",
+    "saucelabs-safari": "cd test && karma start saucelabs-safari.conf.js",
+    "static-analysis": "npm run check-version && npm run jscs && npm run eslint && npm run complexity",
+    "test": "npm run all-tests && npm run static-analysis && npm run dynamic-analysis",
+    "travis": "npm test",
+    "unit-tests": "node test/unit-tests.js"
+  },
+  "version": "2.7.2"
+}
diff --git a/tools/doc/node_modules/js-yaml/CHANGELOG.md b/tools/doc/node_modules/js-yaml/CHANGELOG.md
new file mode 100644
index 00000000000000..da9facbddc5ce6
--- /dev/null
+++ b/tools/doc/node_modules/js-yaml/CHANGELOG.md
@@ -0,0 +1,402 @@
+3.6.1 / 2016-05-11
+------------------
+
+- Fix output cut on a pipe, #286.
+
+
+3.6.0 / 2016-04-16
+------------------
+
+- Dumper rewrite, fix multiple bugs with trailing `\n`.
+  Big thanks to @aepsilon!
+- Loader: fix leading/trailing newlines in block scalars, @aepsilon.
+
+
+3.5.5 / 2016-03-17
+------------------
+
+- Date parse fix: don't allow dates with on digit in month and day, #268.
+
+
+3.5.4 / 2016-03-09
+------------------
+
+- `noCompatMode` for dumper, to disable quoting YAML 1.1 values.
+
+
+3.5.3 / 2016-02-11
+------------------
+
+- Maintenance release.
+
+
+3.5.2 / 2016-01-11
+------------------
+
+- Maintenance: missed comma in bower config.
+
+
+3.5.1 / 2016-01-11
+------------------
+
+- Removed `inherit` dependency, #239.
+- Better browserify workaround for esprima load.
+- Demo rewrite.
+
+
+3.5.0 / 2016-01-10
+------------------
+
+- Dumper. Fold strings only, #217.
+- Dumper. `norefs` option, to clone linked objects, #229.
+- Loader. Throw a warning for duplicate keys, #166.
+- Improved browserify support (mark `esprima` & `Buffer` excluded).
+
+
+3.4.6 / 2015-11-26
+------------------
+
+- Use standalone `inherit` to keep browserified files clear.
+
+
+3.4.5 / 2015-11-23
+------------------
+
+- Added `lineWidth` option to dumper.
+
+
+3.4.4 / 2015-11-21
+------------------
+
+- Fixed floats dump (missed dot for scientific format), #220.
+- Allow non-printable characters inside quoted scalars, #192.
+
+
+3.4.3 / 2015-10-10
+------------------
+
+- Maintenance release - deps bump (esprima, argparse).
+
+
+3.4.2 / 2015-09-09
+------------------
+
+- Fixed serialization of duplicated entries in sequences, #205.
+  Thanks to @vogelsgesang.
+
+
+3.4.1 / 2015-09-05
+------------------
+
+- Fixed stacktrace handling in generated errors, for browsers (FF/IE).
+
+
+3.4.0 / 2015-08-23
+------------------
+
+- Fixed multiline keys dump, #197. Thanks to @tcr.
+- Don't throw on warnongs anymore. Use `onWarning` option to catch.
+- Throw error on unknown tags (was warning before).
+- Fixed heading line breaks in some scalars (regression).
+- Reworked internals of error class.
+
+
+3.3.1 / 2015-05-13
+------------------
+
+- Added `.sortKeys` dumper option, thanks to @rjmunro.
+- Fixed astral characters support, #191.
+
+
+3.3.0 / 2015-04-26
+------------------
+
+- Significantly improved long strings formatting in dumper, thanks to @isaacs.
+- Strip BOM if exists.
+
+
+3.2.7 / 2015-02-19
+------------------
+
+- Maintenance release.
+- Updated dependencies.
+- HISTORY.md -> CHANGELOG.md
+
+
+3.2.6 / 2015-02-07
+------------------
+
+- Fixed encoding of UTF-16 surrogate pairs. (e.g. "\U0001F431" CAT FACE).
+- Fixed demo dates dump (#113, thanks to @Hypercubed).
+
+
+3.2.5 / 2014-12-28
+------------------
+
+- Fixed resolving of all built-in types on empty nodes.
+- Fixed invalid warning on empty lines within quoted scalars and flow collections.
+- Fixed bug: Tag on an empty node didn't resolve in some cases.
+
+
+3.2.4 / 2014-12-19
+------------------
+
+- Fixed resolving of !!null tag on an empty node.
+
+
+3.2.3 / 2014-11-08
+------------------
+
+- Implemented dumping of objects with circular and cross references.
+- Partially fixed aliasing of constructed objects. (see issue #141 for details)
+
+
+3.2.2 / 2014-09-07
+------------------
+
+- Fixed infinite loop on unindented block scalars.
+- Rewritten base64 encode/decode in binary type, to keep code licence clear.
+
+
+3.2.1 / 2014-08-24
+------------------
+
+- Nothig new. Just fix npm publish error.
+
+
+3.2.0 / 2014-08-24
+------------------
+
+- Added input piping support to CLI.
+- Fixed typo, that could cause hand on initial indent (#139).
+
+
+3.1.0 / 2014-07-07
+------------------
+
+- 1.5x-2x speed boost.
+- Removed deprecated `require('xxx.yml')` support.
+- Significant code cleanup and refactoring.
+- Internal API changed. If you used custom types - see updated examples.
+  Others are not affected.
+- Even if the input string has no trailing line break character,
+  it will be parsed as if it has one.
+- Added benchmark scripts.
+- Moved bower files to /dist folder
+- Bugfixes.
+
+
+3.0.2 / 2014-02-27
+------------------
+
+- Fixed bug: "constructor" string parsed as `null`.
+
+
+3.0.1 / 2013-12-22
+------------------
+
+- Fixed parsing of literal scalars. (issue #108)
+- Prevented adding unnecessary spaces in object dumps. (issue #68)
+- Fixed dumping of objects with very long (> 1024 in length) keys.
+
+
+3.0.0 / 2013-12-16
+------------------
+
+- Refactored code. Changed API for custom types.
+- Removed output colors in CLI, dump json by default.
+- Removed big dependencies from browser version (esprima, buffer)
+  - load `esprima` manually, if !!js/function needed
+  - !!bin now returns Array in browser
+- AMD support.
+- Don't quote dumped strings because of `-` & `?` (if not first char).
+- __Deprecated__ loading yaml files via `require()`, as not recommended
+  behaviour for node.
+
+
+2.1.3 / 2013-10-16
+------------------
+
+- Fix wrong loading of empty block scalars.
+
+
+2.1.2 / 2013-10-07
+------------------
+
+- Fix unwanted line breaks in folded scalars.
+
+
+2.1.1 / 2013-10-02
+------------------
+
+- Dumper now respects deprecated booleans syntax from YAML 1.0/1.1
+- Fixed reader bug in JSON-like sequences/mappings.
+
+
+2.1.0 / 2013-06-05
+------------------
+
+- Add standard YAML schemas: Failsafe (`FAILSAFE_SCHEMA`),
+  JSON (`JSON_SCHEMA`) and Core (`CORE_SCHEMA`).
+- Rename `DEFAULT_SCHEMA` to `DEFAULT_FULL_SCHEMA`
+  and `SAFE_SCHEMA` to `DEFAULT_SAFE_SCHEMA`.
+- Bug fix: export `NIL` constant from the public interface.
+- Add `skipInvalid` dumper option.
+- Use `safeLoad` for `require` extension.
+
+
+2.0.5 / 2013-04-26
+------------------
+
+- Close security issue in !!js/function constructor.
+  Big thanks to @nealpoole for security audit.
+
+
+2.0.4 / 2013-04-08
+------------------
+
+- Updated .npmignore to reduce package size
+
+
+2.0.3 / 2013-02-26
+------------------
+
+- Fixed dumping of empty arrays ans objects. ([] and {} instead of null)
+
+
+2.0.2 / 2013-02-15
+------------------
+
+- Fixed input validation: tabs are printable characters.
+
+
+2.0.1 / 2013-02-09
+------------------
+
+- Fixed error, when options not passed to function cass
+
+
+2.0.0 / 2013-02-09
+------------------
+
+- Full rewrite. New architecture. Fast one-stage parsing.
+- Changed custom types API.
+- Added YAML dumper.
+
+
+1.0.3 / 2012-11-05
+------------------
+
+- Fixed utf-8 files loading.
+
+
+1.0.2 / 2012-08-02
+------------------
+
+- Pull out hand-written shims. Use ES5-Shims for old browsers support. See #44.
+- Fix timstamps incorectly parsed in local time when no time part specified.
+
+
+1.0.1 / 2012-07-07
+------------------
+
+- Fixes `TypeError: 'undefined' is not an object` under Safari. Thanks Phuong.
+- Fix timestamps incorrectly parsed in local time. Thanks @caolan. Closes #46.
+
+
+1.0.0 / 2012-07-01
+------------------
+
+- `y`, `yes`, `n`, `no`, `on`, `off` are not converted to Booleans anymore.
+  Fixes #42.
+- `require(filename)` now returns a single document and throws an Error if
+  file contains more than one document.
+- CLI was merged back from js-yaml.bin
+
+
+0.3.7 / 2012-02-28
+------------------
+
+- Fix export of `addConstructor()`. Closes #39.
+
+
+0.3.6 / 2012-02-22
+------------------
+
+- Removed AMD parts - too buggy to use. Need help to rewrite from scratch
+- Removed YUI compressor warning (renamed `double` variable). Closes #40.
+
+
+0.3.5 / 2012-01-10
+------------------
+
+- Workagound for .npmignore fuckup under windows. Thanks to airportyh.
+
+
+0.3.4 / 2011-12-24
+------------------
+
+- Fixes str[] for oldIEs support.
+- Adds better has change support for browserified demo.
+- improves compact output of Error. Closes #33.
+
+
+0.3.3 / 2011-12-20
+------------------
+
+- jsyaml executable moved to separate module.
+- adds `compact` stringification of Errors.
+
+
+0.3.2 / 2011-12-16
+------------------
+
+- Fixes ug with block style scalars. Closes #26.
+- All sources are passing JSLint now.
+- Fixes bug in Safari. Closes #28.
+- Fixes bug in Opers. Closes #29.
+- Improves browser support. Closes #20.
+- Added jsyaml executable.
+- Added !!js/function support. Closes #12.
+
+
+0.3.1 / 2011-11-18
+------------------
+
+- Added AMD support for browserified version.
+- Wrapped browserified js-yaml into closure.
+- Fixed the resolvement of non-specific tags. Closes #17.
+- Added permalinks for online demo YAML snippets. Now we have YPaste service, lol.
+- Added !!js/regexp and !!js/undefined types. Partially solves #12.
+- Fixed !!set mapping.
+- Fixed month parse in dates. Closes #19.
+
+
+0.3.0 / 2011-11-09
+------------------
+
+- Removed JS.Class dependency. Closes #3.
+- Added browserified version. Closes #13.
+- Added live demo of browserified version.
+- Ported some of the PyYAML tests. See #14.
+- Fixed timestamp bug when fraction was given.
+
+
+0.2.2 / 2011-11-06
+------------------
+
+- Fixed crash on docs without ---. Closes #8.
+- Fixed miltiline string parse
+- Fixed tests/comments for using array as key
+
+
+0.2.1 / 2011-11-02
+------------------
+
+- Fixed short file read (<4k). Closes #9.
+
+
+0.2.0 / 2011-11-02
+------------------
+
+- First public release
diff --git a/tools/doc/node_modules/js-yaml/LICENSE b/tools/doc/node_modules/js-yaml/LICENSE
new file mode 100644
index 00000000000000..09d3a29e93d123
--- /dev/null
+++ b/tools/doc/node_modules/js-yaml/LICENSE
@@ -0,0 +1,21 @@
+(The MIT License)
+
+Copyright (C) 2011-2015 by Vitaly Puzrin
+
+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.
diff --git a/tools/doc/node_modules/js-yaml/README.md b/tools/doc/node_modules/js-yaml/README.md
new file mode 100644
index 00000000000000..45c35020ce2998
--- /dev/null
+++ b/tools/doc/node_modules/js-yaml/README.md
@@ -0,0 +1,295 @@
+JS-YAML - YAML 1.2 parser / writer for JavaScript
+=================================================
+
+[![Build Status](https://travis-ci.org/nodeca/js-yaml.svg?branch=master)](https://travis-ci.org/nodeca/js-yaml)
+[![NPM version](https://img.shields.io/npm/v/js-yaml.svg)](https://www.npmjs.org/package/js-yaml)
+
+__[Online Demo](http://nodeca.github.com/js-yaml/)__
+
+
+This is an implementation of [YAML](http://yaml.org/), a human friendly data
+serialization language. Started as [PyYAML](http://pyyaml.org/) port, it was
+completely rewritten from scratch. Now it's very fast, and supports 1.2 spec.
+
+
+Installation
+------------
+
+### YAML module for node.js
+
+```
+npm install js-yaml
+```
+
+
+### CLI executable
+
+If you want to inspect your YAML files from CLI, install js-yaml globally:
+
+```
+npm install -g js-yaml
+```
+
+#### Usage
+
+```
+usage: js-yaml [-h] [-v] [-c] [-t] file
+
+Positional arguments:
+  file           File with YAML document(s)
+
+Optional arguments:
+  -h, --help     Show this help message and exit.
+  -v, --version  Show program's version number and exit.
+  -c, --compact  Display errors in compact mode
+  -t, --trace    Show stack trace on error
+```
+
+
+### Bundled YAML library for browsers
+
+``` html
+<!-- esprima required only for !!js/function -->
+<script src="esprima.js"></script>
+<script src="js-yaml.min.js"></script>
+<script type="text/javascript">
+var doc = jsyaml.load('greeting: hello\nname: world');
+</script>
+```
+
+Browser support was done mostly for online demo. If you find any errors - feel
+free to send pull requests with fixes. Also note, that IE and other old browsers
+needs [es5-shims](https://github.com/kriskowal/es5-shim) to operate.
+
+Notes:
+
+1. We have no resources to support browserified version. Don't expect it to be
+   well tested. Don't expect fast fixes if something goes wrong there.
+2. `!!js/function` in browser bundle will not work by default. If you really need
+   it - load `esprima` parser first (via amd or directly).
+3. `!!bin` in browser will return `Array`, because browsers do not support
+   node.js `Buffer` and adding Buffer shims is completely useless on practice.
+
+
+API
+---
+
+Here we cover the most 'useful' methods. If you need advanced details (creating
+your own tags), see [wiki](https://github.com/nodeca/js-yaml/wiki) and
+[examples](https://github.com/nodeca/js-yaml/tree/master/examples) for more
+info.
+
+``` javascript
+yaml = require('js-yaml');
+fs   = require('fs');
+
+// Get document, or throw exception on error
+try {
+  var doc = yaml.safeLoad(fs.readFileSync('/home/ixti/example.yml', 'utf8'));
+  console.log(doc);
+} catch (e) {
+  console.log(e);
+}
+```
+
+
+### safeLoad (string [ , options ])
+
+**Recommended loading way.** Parses `string` as single YAML document. Returns a JavaScript
+object or throws `YAMLException` on error. By default, does not support regexps,
+functions and undefined. This method is safe for untrusted data.
+
+options:
+
+- `filename` _(default: null)_ - string to be used as a file path in
+  error/warning messages.
+- `onWarning` _(default: null)_ - function to call on warning messages.
+  Loader will throw on warnings if this function is not provided.
+- `schema` _(default: `DEFAULT_SAFE_SCHEMA`)_ - specifies a schema to use.
+  - `FAILSAFE_SCHEMA` - only strings, arrays and plain objects:
+    http://www.yaml.org/spec/1.2/spec.html#id2802346
+  - `JSON_SCHEMA` - all JSON-supported types:
+    http://www.yaml.org/spec/1.2/spec.html#id2803231
+  - `CORE_SCHEMA` - same as `JSON_SCHEMA`:
+    http://www.yaml.org/spec/1.2/spec.html#id2804923
+  - `DEFAULT_SAFE_SCHEMA` - all supported YAML types, without unsafe ones
+    (`!!js/undefined`, `!!js/regexp` and `!!js/function`):
+    http://yaml.org/type/
+  - `DEFAULT_FULL_SCHEMA` - all supported YAML types.
+- `json` _(default: false)_ - compatibility with JSON.parse behaviour. If true, then duplicate keys in a mapping will override values rather than throwing an error.
+
+NOTE: This function **does not** understand multi-document sources, it throws
+exception on those.
+
+NOTE: JS-YAML **does not** support schema-specific tag resolution restrictions.
+So, JSON schema is not as strict as defined in the YAML specification.
+It allows numbers in any notation, use `Null` and `NULL` as `null`, etc.
+Core schema also has no such restrictions. It allows binary notation for integers.
+
+
+### load (string [ , options ])
+
+**Use with care with untrusted sources**. The same as `safeLoad()` but uses
+`DEFAULT_FULL_SCHEMA` by default - adds some JavaScript-specific types:
+`!!js/function`, `!!js/regexp` and `!!js/undefined`. For untrusted sources you
+must additionally validate object structure, to avoid injections:
+
+``` javascript
+var untrusted_code = '"toString": !<tag:yaml.org,2002:js/function> "function (){very_evil_thing();}"';
+
+// I'm just converting that string, what could possibly go wrong?
+require('js-yaml').load(untrusted_code) + ''
+```
+
+
+### safeLoadAll (string, iterator [ , options ])
+
+Same as `safeLoad()`, but understands multi-document sources and apply
+`iterator` to each document.
+
+``` javascript
+var yaml = require('js-yaml');
+
+yaml.safeLoadAll(data, function (doc) {
+  console.log(doc);
+});
+```
+
+
+### loadAll (string, iterator [ , options ])
+
+Same as `safeLoadAll()` but uses `DEFAULT_FULL_SCHEMA` by default.
+
+
+### safeDump (object [ , options ])
+
+Serializes `object` as YAML document. Uses `DEFAULT_SAFE_SCHEMA`, so it will
+throw exception if you try to dump regexps or functions. However, you can
+disable exceptions by `skipInvalid` option.
+
+options:
+
+- `indent` _(default: 2)_ - indentation width to use (in spaces).
+- `skipInvalid` _(default: false)_ - do not throw on invalid types (like function
+  in the safe schema) and skip pairs and single values with such types.
+- `flowLevel` (default: -1) - specifies level of nesting, when to switch from
+  block to flow style for collections. -1 means block style everwhere
+- `styles` - "tag" => "style" map. Each tag may have own set of styles.
+- `schema` _(default: `DEFAULT_SAFE_SCHEMA`)_ specifies a schema to use.
+- `sortKeys` _(default: `false`)_ - if `true`, sort keys when dumping YAML. If a
+  function, use the function to sort the keys.
+- `lineWidth` _(default: `80`)_ - set max line width.
+- `noRefs` _(default: `false`)_ - if `true`, don't convert duplicate objects into references
+- `noCompatMode` _(default: `false`)_ - if `true` don't try to be compatible with older
+  yaml versions. Currently: don't quote "yes", "no" and so on, as required for YAML 1.1
+
+styles:
+
+``` none
+!!null
+  "canonical"   => "~"
+
+!!int
+  "binary"      => "0b1", "0b101010", "0b1110001111010"
+  "octal"       => "01", "052", "016172"
+  "decimal"     => "1", "42", "7290"
+  "hexadecimal" => "0x1", "0x2A", "0x1C7A"
+
+!!null, !!bool, !!float
+  "lowercase"   => "null", "true", "false", ".nan", '.inf'
+  "uppercase"   => "NULL", "TRUE", "FALSE", ".NAN", '.INF'
+  "camelcase"   => "Null", "True", "False", ".NaN", '.Inf'
+```
+
+By default, !!int uses `decimal`, and !!null, !!bool, !!float use `lowercase`.
+
+
+
+### dump (object [ , options ])
+
+Same as `safeDump()` but without limits (uses `DEFAULT_FULL_SCHEMA` by default).
+
+
+Supported YAML types
+--------------------
+
+The list of standard YAML tags and corresponding JavaScipt types. See also
+[YAML tag discussion](http://pyyaml.org/wiki/YAMLTagDiscussion) and
+[YAML types repository](http://yaml.org/type/).
+
+```
+!!null ''                   # null
+!!bool 'yes'                # bool
+!!int '3...'                # number
+!!float '3.14...'           # number
+!!binary '...base64...'     # buffer
+!!timestamp 'YYYY-...'      # date
+!!omap [ ... ]              # array of key-value pairs
+!!pairs [ ... ]             # array or array pairs
+!!set { ... }               # array of objects with given keys and null values
+!!str '...'                 # string
+!!seq [ ... ]               # array
+!!map { ... }               # object
+```
+
+**JavaScript-specific tags**
+
+```
+!!js/regexp /pattern/gim            # RegExp
+!!js/undefined ''                   # Undefined
+!!js/function 'function () {...}'   # Function
+```
+
+Caveats
+-------
+
+Note, that you use arrays or objects as key in JS-YAML. JS does not allow objects
+or array as keys, and stringifies (by calling .toString method) them at the
+moment of adding them.
+
+``` yaml
+---
+? [ foo, bar ]
+: - baz
+? { foo: bar }
+: - baz
+  - baz
+```
+
+``` javascript
+{ "foo,bar": ["baz"], "[object Object]": ["baz", "baz"] }
+```
+
+Also, reading of properties on implicit block mapping keys is not supported yet.
+So, the following YAML document cannot be loaded.
+
+``` yaml
+&anchor foo:
+  foo: bar
+  *anchor: duplicate key
+  baz: bat
+  *anchor: duplicate key
+```
+
+
+Breaking changes in 2.x.x -> 3.x.x
+----------------------------------
+
+If you have not used __custom__ tags or loader classes and not loaded yaml
+files via `require()` - no changes needed. Just upgrade library.
+
+Otherwise, you should:
+
+1. Replace all occurences of `require('xxxx.yml')` by `fs.readFileSync()` +
+  `yaml.safeLoad()`.
+2. rewrite your custom tags constructors and custom loader
+  classes, to conform new API. See
+  [examples](https://github.com/nodeca/js-yaml/tree/master/examples) and
+  [wiki](https://github.com/nodeca/js-yaml/wiki) for details.
+
+
+License
+-------
+
+View the [LICENSE](https://github.com/nodeca/js-yaml/blob/master/LICENSE) file
+(MIT).
diff --git a/tools/doc/node_modules/js-yaml/bin/js-yaml.js b/tools/doc/node_modules/js-yaml/bin/js-yaml.js
new file mode 100755
index 00000000000000..e79186be6f56f1
--- /dev/null
+++ b/tools/doc/node_modules/js-yaml/bin/js-yaml.js
@@ -0,0 +1,132 @@
+#!/usr/bin/env node
+
+
+'use strict';
+
+/*eslint-disable no-console*/
+
+
+// stdlib
+var fs    = require('fs');
+
+
+// 3rd-party
+var argparse = require('argparse');
+
+
+// internal
+var yaml = require('..');
+
+
+////////////////////////////////////////////////////////////////////////////////
+
+
+var cli = new argparse.ArgumentParser({
+  prog:     'js-yaml',
+  version:  require('../package.json').version,
+  addHelp:  true
+});
+
+
+cli.addArgument([ '-c', '--compact' ], {
+  help:   'Display errors in compact mode',
+  action: 'storeTrue'
+});
+
+
+// deprecated (not needed after we removed output colors)
+// option suppressed, but not completely removed for compatibility
+cli.addArgument([ '-j', '--to-json' ], {
+  help:   argparse.Const.SUPPRESS,
+  dest:   'json',
+  action: 'storeTrue'
+});
+
+
+cli.addArgument([ '-t', '--trace' ], {
+  help:   'Show stack trace on error',
+  action: 'storeTrue'
+});
+
+cli.addArgument([ 'file' ], {
+  help:   'File to read, utf-8 encoded without BOM',
+  nargs:  '?',
+  defaultValue: '-'
+});
+
+
+////////////////////////////////////////////////////////////////////////////////
+
+
+var options = cli.parseArgs();
+
+
+////////////////////////////////////////////////////////////////////////////////
+
+function readFile(filename, encoding, callback) {
+  if (options.file === '-') {
+    // read from stdin
+
+    var chunks = [];
+
+    process.stdin.on('data', function (chunk) {
+      chunks.push(chunk);
+    });
+
+    process.stdin.on('end', function () {
+      return callback(null, Buffer.concat(chunks).toString(encoding));
+    });
+  } else {
+    fs.readFile(filename, encoding, callback);
+  }
+}
+
+readFile(options.file, 'utf8', function (error, input) {
+  var output, isYaml;
+
+  if (error) {
+    if (error.code === 'ENOENT') {
+      console.error('File not found: ' + options.file);
+      process.exit(2);
+    }
+
+    console.error(
+      options.trace && error.stack ||
+      error.message ||
+      String(error));
+
+    process.exit(1);
+  }
+
+  try {
+    output = JSON.parse(input);
+    isYaml = false;
+  } catch (err) {
+    if (err instanceof SyntaxError) {
+      try {
+        output = [];
+        yaml.loadAll(input, function (doc) { output.push(doc); }, {});
+        isYaml = true;
+
+        if (output.length === 0) output = null;
+        else if (output.length === 1) output = output[0];
+
+      } catch (e) {
+        if (options.trace && err.stack) console.error(e.stack);
+        else console.error(e.toString(options.compact));
+
+        process.exit(1);
+      }
+    } else {
+      console.error(
+        options.trace && err.stack ||
+        err.message ||
+        String(err));
+
+      process.exit(1);
+    }
+  }
+
+  if (isYaml) console.log(JSON.stringify(output, null, '  '));
+  else console.log(yaml.dump(output));
+});
diff --git a/tools/doc/node_modules/js-yaml/dist/js-yaml.js b/tools/doc/node_modules/js-yaml/dist/js-yaml.js
new file mode 100644
index 00000000000000..f7e893e4f2ab14
--- /dev/null
+++ b/tools/doc/node_modules/js-yaml/dist/js-yaml.js
@@ -0,0 +1,3851 @@
+/* js-yaml 3.6.1 https://github.com/nodeca/js-yaml */(function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g.jsyaml = f()}})(function(){var define,module,exports;return (function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){
+'use strict';
+
+
+var loader = require('./js-yaml/loader');
+var dumper = require('./js-yaml/dumper');
+
+
+function deprecated(name) {
+  return function () {
+    throw new Error('Function ' + name + ' is deprecated and cannot be used.');
+  };
+}
+
+
+module.exports.Type                = require('./js-yaml/type');
+module.exports.Schema              = require('./js-yaml/schema');
+module.exports.FAILSAFE_SCHEMA     = require('./js-yaml/schema/failsafe');
+module.exports.JSON_SCHEMA         = require('./js-yaml/schema/json');
+module.exports.CORE_SCHEMA         = require('./js-yaml/schema/core');
+module.exports.DEFAULT_SAFE_SCHEMA = require('./js-yaml/schema/default_safe');
+module.exports.DEFAULT_FULL_SCHEMA = require('./js-yaml/schema/default_full');
+module.exports.load                = loader.load;
+module.exports.loadAll             = loader.loadAll;
+module.exports.safeLoad            = loader.safeLoad;
+module.exports.safeLoadAll         = loader.safeLoadAll;
+module.exports.dump                = dumper.dump;
+module.exports.safeDump            = dumper.safeDump;
+module.exports.YAMLException       = require('./js-yaml/exception');
+
+// Deprecated schema names from JS-YAML 2.0.x
+module.exports.MINIMAL_SCHEMA = require('./js-yaml/schema/failsafe');
+module.exports.SAFE_SCHEMA    = require('./js-yaml/schema/default_safe');
+module.exports.DEFAULT_SCHEMA = require('./js-yaml/schema/default_full');
+
+// Deprecated functions from JS-YAML 1.x.x
+module.exports.scan           = deprecated('scan');
+module.exports.parse          = deprecated('parse');
+module.exports.compose        = deprecated('compose');
+module.exports.addConstructor = deprecated('addConstructor');
+
+},{"./js-yaml/dumper":3,"./js-yaml/exception":4,"./js-yaml/loader":5,"./js-yaml/schema":7,"./js-yaml/schema/core":8,"./js-yaml/schema/default_full":9,"./js-yaml/schema/default_safe":10,"./js-yaml/schema/failsafe":11,"./js-yaml/schema/json":12,"./js-yaml/type":13}],2:[function(require,module,exports){
+'use strict';
+
+
+function isNothing(subject) {
+  return (typeof subject === 'undefined') || (subject === null);
+}
+
+
+function isObject(subject) {
+  return (typeof subject === 'object') && (subject !== null);
+}
+
+
+function toArray(sequence) {
+  if (Array.isArray(sequence)) return sequence;
+  else if (isNothing(sequence)) return [];
+
+  return [ sequence ];
+}
+
+
+function extend(target, source) {
+  var index, length, key, sourceKeys;
+
+  if (source) {
+    sourceKeys = Object.keys(source);
+
+    for (index = 0, length = sourceKeys.length; index < length; index += 1) {
+      key = sourceKeys[index];
+      target[key] = source[key];
+    }
+  }
+
+  return target;
+}
+
+
+function repeat(string, count) {
+  var result = '', cycle;
+
+  for (cycle = 0; cycle < count; cycle += 1) {
+    result += string;
+  }
+
+  return result;
+}
+
+
+function isNegativeZero(number) {
+  return (number === 0) && (Number.NEGATIVE_INFINITY === 1 / number);
+}
+
+
+module.exports.isNothing      = isNothing;
+module.exports.isObject       = isObject;
+module.exports.toArray        = toArray;
+module.exports.repeat         = repeat;
+module.exports.isNegativeZero = isNegativeZero;
+module.exports.extend         = extend;
+
+},{}],3:[function(require,module,exports){
+'use strict';
+
+/*eslint-disable no-use-before-define*/
+
+var common              = require('./common');
+var YAMLException       = require('./exception');
+var DEFAULT_FULL_SCHEMA = require('./schema/default_full');
+var DEFAULT_SAFE_SCHEMA = require('./schema/default_safe');
+
+var _toString       = Object.prototype.toString;
+var _hasOwnProperty = Object.prototype.hasOwnProperty;
+
+var CHAR_TAB                  = 0x09; /* Tab */
+var CHAR_LINE_FEED            = 0x0A; /* LF */
+var CHAR_SPACE                = 0x20; /* Space */
+var CHAR_EXCLAMATION          = 0x21; /* ! */
+var CHAR_DOUBLE_QUOTE         = 0x22; /* " */
+var CHAR_SHARP                = 0x23; /* # */
+var CHAR_PERCENT              = 0x25; /* % */
+var CHAR_AMPERSAND            = 0x26; /* & */
+var CHAR_SINGLE_QUOTE         = 0x27; /* ' */
+var CHAR_ASTERISK             = 0x2A; /* * */
+var CHAR_COMMA                = 0x2C; /* , */
+var CHAR_MINUS                = 0x2D; /* - */
+var CHAR_COLON                = 0x3A; /* : */
+var CHAR_GREATER_THAN         = 0x3E; /* > */
+var CHAR_QUESTION             = 0x3F; /* ? */
+var CHAR_COMMERCIAL_AT        = 0x40; /* @ */
+var CHAR_LEFT_SQUARE_BRACKET  = 0x5B; /* [ */
+var CHAR_RIGHT_SQUARE_BRACKET = 0x5D; /* ] */
+var CHAR_GRAVE_ACCENT         = 0x60; /* ` */
+var CHAR_LEFT_CURLY_BRACKET   = 0x7B; /* { */
+var CHAR_VERTICAL_LINE        = 0x7C; /* | */
+var CHAR_RIGHT_CURLY_BRACKET  = 0x7D; /* } */
+
+var ESCAPE_SEQUENCES = {};
+
+ESCAPE_SEQUENCES[0x00]   = '\\0';
+ESCAPE_SEQUENCES[0x07]   = '\\a';
+ESCAPE_SEQUENCES[0x08]   = '\\b';
+ESCAPE_SEQUENCES[0x09]   = '\\t';
+ESCAPE_SEQUENCES[0x0A]   = '\\n';
+ESCAPE_SEQUENCES[0x0B]   = '\\v';
+ESCAPE_SEQUENCES[0x0C]   = '\\f';
+ESCAPE_SEQUENCES[0x0D]   = '\\r';
+ESCAPE_SEQUENCES[0x1B]   = '\\e';
+ESCAPE_SEQUENCES[0x22]   = '\\"';
+ESCAPE_SEQUENCES[0x5C]   = '\\\\';
+ESCAPE_SEQUENCES[0x85]   = '\\N';
+ESCAPE_SEQUENCES[0xA0]   = '\\_';
+ESCAPE_SEQUENCES[0x2028] = '\\L';
+ESCAPE_SEQUENCES[0x2029] = '\\P';
+
+var DEPRECATED_BOOLEANS_SYNTAX = [
+  'y', 'Y', 'yes', 'Yes', 'YES', 'on', 'On', 'ON',
+  'n', 'N', 'no', 'No', 'NO', 'off', 'Off', 'OFF'
+];
+
+function compileStyleMap(schema, map) {
+  var result, keys, index, length, tag, style, type;
+
+  if (map === null) return {};
+
+  result = {};
+  keys = Object.keys(map);
+
+  for (index = 0, length = keys.length; index < length; index += 1) {
+    tag = keys[index];
+    style = String(map[tag]);
+
+    if (tag.slice(0, 2) === '!!') {
+      tag = 'tag:yaml.org,2002:' + tag.slice(2);
+    }
+
+    type = schema.compiledTypeMap[tag];
+
+    if (type && _hasOwnProperty.call(type.styleAliases, style)) {
+      style = type.styleAliases[style];
+    }
+
+    result[tag] = style;
+  }
+
+  return result;
+}
+
+function encodeHex(character) {
+  var string, handle, length;
+
+  string = character.toString(16).toUpperCase();
+
+  if (character <= 0xFF) {
+    handle = 'x';
+    length = 2;
+  } else if (character <= 0xFFFF) {
+    handle = 'u';
+    length = 4;
+  } else if (character <= 0xFFFFFFFF) {
+    handle = 'U';
+    length = 8;
+  } else {
+    throw new YAMLException('code point within a string may not be greater than 0xFFFFFFFF');
+  }
+
+  return '\\' + handle + common.repeat('0', length - string.length) + string;
+}
+
+function State(options) {
+  this.schema       = options['schema'] || DEFAULT_FULL_SCHEMA;
+  this.indent       = Math.max(1, (options['indent'] || 2));
+  this.skipInvalid  = options['skipInvalid'] || false;
+  this.flowLevel    = (common.isNothing(options['flowLevel']) ? -1 : options['flowLevel']);
+  this.styleMap     = compileStyleMap(this.schema, options['styles'] || null);
+  this.sortKeys     = options['sortKeys'] || false;
+  this.lineWidth    = options['lineWidth'] || 80;
+  this.noRefs       = options['noRefs'] || false;
+  this.noCompatMode = options['noCompatMode'] || false;
+
+  this.implicitTypes = this.schema.compiledImplicit;
+  this.explicitTypes = this.schema.compiledExplicit;
+
+  this.tag = null;
+  this.result = '';
+
+  this.duplicates = [];
+  this.usedDuplicates = null;
+}
+
+// Indents every line in a string. Empty lines (\n only) are not indented.
+function indentString(string, spaces) {
+  var ind = common.repeat(' ', spaces),
+      position = 0,
+      next = -1,
+      result = '',
+      line,
+      length = string.length;
+
+  while (position < length) {
+    next = string.indexOf('\n', position);
+    if (next === -1) {
+      line = string.slice(position);
+      position = length;
+    } else {
+      line = string.slice(position, next + 1);
+      position = next + 1;
+    }
+
+    if (line.length && line !== '\n') result += ind;
+
+    result += line;
+  }
+
+  return result;
+}
+
+function generateNextLine(state, level) {
+  return '\n' + common.repeat(' ', state.indent * level);
+}
+
+function testImplicitResolving(state, str) {
+  var index, length, type;
+
+  for (index = 0, length = state.implicitTypes.length; index < length; index += 1) {
+    type = state.implicitTypes[index];
+
+    if (type.resolve(str)) {
+      return true;
+    }
+  }
+
+  return false;
+}
+
+// [33] s-white ::= s-space | s-tab
+function isWhitespace(c) {
+  return c === CHAR_SPACE || c === CHAR_TAB;
+}
+
+// Returns true if the character can be printed without escaping.
+// From YAML 1.2: "any allowed characters known to be non-printable
+// should also be escaped. [However,] This isn’t mandatory"
+// Derived from nb-char - \t - #x85 - #xA0 - #x2028 - #x2029.
+function isPrintable(c) {
+  return  (0x00020 <= c && c <= 0x00007E)
+      || ((0x000A1 <= c && c <= 0x00D7FF) && c !== 0x2028 && c !== 0x2029)
+      || ((0x0E000 <= c && c <= 0x00FFFD) && c !== 0xFEFF /* BOM */)
+      ||  (0x10000 <= c && c <= 0x10FFFF);
+}
+
+// Simplified test for values allowed after the first character in plain style.
+function isPlainSafe(c) {
+  // Uses a subset of nb-char - c-flow-indicator - ":" - "#"
+  // where nb-char ::= c-printable - b-char - c-byte-order-mark.
+  return isPrintable(c) && c !== 0xFEFF
+    // - c-flow-indicator
+    && c !== CHAR_COMMA
+    && c !== CHAR_LEFT_SQUARE_BRACKET
+    && c !== CHAR_RIGHT_SQUARE_BRACKET
+    && c !== CHAR_LEFT_CURLY_BRACKET
+    && c !== CHAR_RIGHT_CURLY_BRACKET
+    // - ":" - "#"
+    && c !== CHAR_COLON
+    && c !== CHAR_SHARP;
+}
+
+// Simplified test for values allowed as the first character in plain style.
+function isPlainSafeFirst(c) {
+  // Uses a subset of ns-char - c-indicator
+  // where ns-char = nb-char - s-white.
+  return isPrintable(c) && c !== 0xFEFF
+    && !isWhitespace(c) // - s-white
+    // - (c-indicator ::=
+    // “-” | “?” | “:” | “,” | “[” | “]” | “{” | “}”
+    && c !== CHAR_MINUS
+    && c !== CHAR_QUESTION
+    && c !== CHAR_COLON
+    && c !== CHAR_COMMA
+    && c !== CHAR_LEFT_SQUARE_BRACKET
+    && c !== CHAR_RIGHT_SQUARE_BRACKET
+    && c !== CHAR_LEFT_CURLY_BRACKET
+    && c !== CHAR_RIGHT_CURLY_BRACKET
+    // | “#” | “&” | “*” | “!” | “|” | “>” | “'” | “"”
+    && c !== CHAR_SHARP
+    && c !== CHAR_AMPERSAND
+    && c !== CHAR_ASTERISK
+    && c !== CHAR_EXCLAMATION
+    && c !== CHAR_VERTICAL_LINE
+    && c !== CHAR_GREATER_THAN
+    && c !== CHAR_SINGLE_QUOTE
+    && c !== CHAR_DOUBLE_QUOTE
+    // | “%” | “@” | “`”)
+    && c !== CHAR_PERCENT
+    && c !== CHAR_COMMERCIAL_AT
+    && c !== CHAR_GRAVE_ACCENT;
+}
+
+var STYLE_PLAIN   = 1,
+    STYLE_SINGLE  = 2,
+    STYLE_LITERAL = 3,
+    STYLE_FOLDED  = 4,
+    STYLE_DOUBLE  = 5;
+
+// Determines which scalar styles are possible and returns the preferred style.
+// lineWidth = -1 => no limit.
+// Pre-conditions: str.length > 0.
+// Post-conditions:
+//    STYLE_PLAIN or STYLE_SINGLE => no \n are in the string.
+//    STYLE_LITERAL => no lines are suitable for folding (or lineWidth is -1).
+//    STYLE_FOLDED => a line > lineWidth and can be folded (and lineWidth != -1).
+function chooseScalarStyle(string, singleLineOnly, indentPerLevel, lineWidth, testAmbiguousType) {
+  var i;
+  var char;
+  var hasLineBreak = false;
+  var hasFoldableLine = false; // only checked if shouldTrackWidth
+  var shouldTrackWidth = lineWidth !== -1;
+  var previousLineBreak = -1; // count the first line correctly
+  var plain = isPlainSafeFirst(string.charCodeAt(0))
+          && !isWhitespace(string.charCodeAt(string.length - 1));
+
+  if (singleLineOnly) {
+    // Case: no block styles.
+    // Check for disallowed characters to rule out plain and single.
+    for (i = 0; i < string.length; i++) {
+      char = string.charCodeAt(i);
+      if (!isPrintable(char)) {
+        return STYLE_DOUBLE;
+      }
+      plain = plain && isPlainSafe(char);
+    }
+  } else {
+    // Case: block styles permitted.
+    for (i = 0; i < string.length; i++) {
+      char = string.charCodeAt(i);
+      if (char === CHAR_LINE_FEED) {
+        hasLineBreak = true;
+        // Check if any line can be folded.
+        if (shouldTrackWidth) {
+          hasFoldableLine = hasFoldableLine ||
+            // Foldable line = too long, and not more-indented.
+            (i - previousLineBreak - 1 > lineWidth &&
+             string[previousLineBreak + 1] !== ' ');
+          previousLineBreak = i;
+        }
+      } else if (!isPrintable(char)) {
+        return STYLE_DOUBLE;
+      }
+      plain = plain && isPlainSafe(char);
+    }
+    // in case the end is missing a \n
+    hasFoldableLine = hasFoldableLine || (shouldTrackWidth &&
+      (i - previousLineBreak - 1 > lineWidth &&
+       string[previousLineBreak + 1] !== ' '));
+  }
+  // Although every style can represent \n without escaping, prefer block styles
+  // for multiline, since they're more readable and they don't add empty lines.
+  // Also prefer folding a super-long line.
+  if (!hasLineBreak && !hasFoldableLine) {
+    // Strings interpretable as another type have to be quoted;
+    // e.g. the string 'true' vs. the boolean true.
+    return plain && !testAmbiguousType(string)
+      ? STYLE_PLAIN : STYLE_SINGLE;
+  }
+  // Edge case: block indentation indicator can only have one digit.
+  if (string[0] === ' ' && indentPerLevel > 9) {
+    return STYLE_DOUBLE;
+  }
+  // At this point we know block styles are valid.
+  // Prefer literal style unless we want to fold.
+  return hasFoldableLine ? STYLE_FOLDED : STYLE_LITERAL;
+}
+
+// Note: line breaking/folding is implemented for only the folded style.
+// NB. We drop the last trailing newline (if any) of a returned block scalar
+//  since the dumper adds its own newline. This always works:
+//    • No ending newline => unaffected; already using strip "-" chomping.
+//    • Ending newline    => removed then restored.
+//  Importantly, this keeps the "+" chomp indicator from gaining an extra line.
+function writeScalar(state, string, level, iskey) {
+  state.dump = (function () {
+    if (string.length === 0) {
+      return "''";
+    }
+    if (!state.noCompatMode &&
+        DEPRECATED_BOOLEANS_SYNTAX.indexOf(string) !== -1) {
+      return "'" + string + "'";
+    }
+
+    var indent = state.indent * Math.max(1, level); // no 0-indent scalars
+    // As indentation gets deeper, let the width decrease monotonically
+    // to the lower bound min(state.lineWidth, 40).
+    // Note that this implies
+    //  state.lineWidth ≤ 40 + state.indent: width is fixed at the lower bound.
+    //  state.lineWidth > 40 + state.indent: width decreases until the lower bound.
+    // This behaves better than a constant minimum width which disallows narrower options,
+    // or an indent threshold which causes the width to suddenly increase.
+    var lineWidth = state.lineWidth === -1
+      ? -1 : Math.max(Math.min(state.lineWidth, 40), state.lineWidth - indent);
+
+    // Without knowing if keys are implicit/explicit, assume implicit for safety.
+    var singleLineOnly = iskey
+      // No block styles in flow mode.
+      || (state.flowLevel > -1 && level >= state.flowLevel);
+    function testAmbiguity(string) {
+      return testImplicitResolving(state, string);
+    }
+
+    switch (chooseScalarStyle(string, singleLineOnly, state.indent, lineWidth, testAmbiguity)) {
+      case STYLE_PLAIN:
+        return string;
+      case STYLE_SINGLE:
+        return "'" + string.replace(/'/g, "''") + "'";
+      case STYLE_LITERAL:
+        return '|' + blockHeader(string, state.indent)
+          + dropEndingNewline(indentString(string, indent));
+      case STYLE_FOLDED:
+        return '>' + blockHeader(string, state.indent)
+          + dropEndingNewline(indentString(foldString(string, lineWidth), indent));
+      case STYLE_DOUBLE:
+        return '"' + escapeString(string, lineWidth) + '"';
+      default:
+        throw new YAMLException('impossible error: invalid scalar style');
+    }
+  }());
+}
+
+// Pre-conditions: string is valid for a block scalar, 1 <= indentPerLevel <= 9.
+function blockHeader(string, indentPerLevel) {
+  var indentIndicator = (string[0] === ' ') ? String(indentPerLevel) : '';
+
+  // note the special case: the string '\n' counts as a "trailing" empty line.
+  var clip =          string[string.length - 1] === '\n';
+  var keep = clip && (string[string.length - 2] === '\n' || string === '\n');
+  var chomp = keep ? '+' : (clip ? '' : '-');
+
+  return indentIndicator + chomp + '\n';
+}
+
+// (See the note for writeScalar.)
+function dropEndingNewline(string) {
+  return string[string.length - 1] === '\n' ? string.slice(0, -1) : string;
+}
+
+// Note: a long line without a suitable break point will exceed the width limit.
+// Pre-conditions: every char in str isPrintable, str.length > 0, width > 0.
+function foldString(string, width) {
+  // In folded style, $k$ consecutive newlines output as $k+1$ newlines—
+  // unless they're before or after a more-indented line, or at the very
+  // beginning or end, in which case $k$ maps to $k$.
+  // Therefore, parse each chunk as newline(s) followed by a content line.
+  var lineRe = /(\n+)([^\n]*)/g;
+
+  // first line (possibly an empty line)
+  var result = (function () {
+    var nextLF = string.indexOf('\n');
+    nextLF = nextLF !== -1 ? nextLF : string.length;
+    lineRe.lastIndex = nextLF;
+    return foldLine(string.slice(0, nextLF), width);
+  }());
+  // If we haven't reached the first content line yet, don't add an extra \n.
+  var prevMoreIndented = string[0] === '\n' || string[0] === ' ';
+  var moreIndented;
+
+  // rest of the lines
+  var match;
+  while ((match = lineRe.exec(string))) {
+    var prefix = match[1], line = match[2];
+    moreIndented = (line[0] === ' ');
+    result += prefix
+      + (!prevMoreIndented && !moreIndented && line !== ''
+        ? '\n' : '')
+      + foldLine(line, width);
+    prevMoreIndented = moreIndented;
+  }
+
+  return result;
+}
+
+// Greedy line breaking.
+// Picks the longest line under the limit each time,
+// otherwise settles for the shortest line over the limit.
+// NB. More-indented lines *cannot* be folded, as that would add an extra \n.
+function foldLine(line, width) {
+  if (line === '' || line[0] === ' ') return line;
+
+  // Since a more-indented line adds a \n, breaks can't be followed by a space.
+  var breakRe = / [^ ]/g; // note: the match index will always be <= length-2.
+  var match;
+  // start is an inclusive index. end, curr, and next are exclusive.
+  var start = 0, end, curr = 0, next = 0;
+  var result = '';
+
+  // Invariants: 0 <= start <= length-1.
+  //   0 <= curr <= next <= max(0, length-2). curr - start <= width.
+  // Inside the loop:
+  //   A match implies length >= 2, so curr and next are <= length-2.
+  while ((match = breakRe.exec(line))) {
+    next = match.index;
+    // maintain invariant: curr - start <= width
+    if (next - start > width) {
+      end = (curr > start) ? curr : next; // derive end <= length-2
+      result += '\n' + line.slice(start, end);
+      // skip the space that was output as \n
+      start = end + 1;                    // derive start <= length-1
+    }
+    curr = next;
+  }
+
+  // By the invariants, start <= length-1, so there is something left over.
+  // It is either the whole string or a part starting from non-whitespace.
+  result += '\n';
+  // Insert a break if the remainder is too long and there is a break available.
+  if (line.length - start > width && curr > start) {
+    result += line.slice(start, curr) + '\n' + line.slice(curr + 1);
+  } else {
+    result += line.slice(start);
+  }
+
+  return result.slice(1); // drop extra \n joiner
+}
+
+// Escapes a double-quoted string.
+function escapeString(string) {
+  var result = '';
+  var char;
+  var escapeSeq;
+
+  for (var i = 0; i < string.length; i++) {
+    char = string.charCodeAt(i);
+    escapeSeq = ESCAPE_SEQUENCES[char];
+    result += !escapeSeq && isPrintable(char)
+      ? string[i]
+      : escapeSeq || encodeHex(char);
+  }
+
+  return result;
+}
+
+function writeFlowSequence(state, level, object) {
+  var _result = '',
+      _tag    = state.tag,
+      index,
+      length;
+
+  for (index = 0, length = object.length; index < length; index += 1) {
+    // Write only valid elements.
+    if (writeNode(state, level, object[index], false, false)) {
+      if (index !== 0) _result += ', ';
+      _result += state.dump;
+    }
+  }
+
+  state.tag = _tag;
+  state.dump = '[' + _result + ']';
+}
+
+function writeBlockSequence(state, level, object, compact) {
+  var _result = '',
+      _tag    = state.tag,
+      index,
+      length;
+
+  for (index = 0, length = object.length; index < length; index += 1) {
+    // Write only valid elements.
+    if (writeNode(state, level + 1, object[index], true, true)) {
+      if (!compact || index !== 0) {
+        _result += generateNextLine(state, level);
+      }
+      _result += '- ' + state.dump;
+    }
+  }
+
+  state.tag = _tag;
+  state.dump = _result || '[]'; // Empty sequence if no valid values.
+}
+
+function writeFlowMapping(state, level, object) {
+  var _result       = '',
+      _tag          = state.tag,
+      objectKeyList = Object.keys(object),
+      index,
+      length,
+      objectKey,
+      objectValue,
+      pairBuffer;
+
+  for (index = 0, length = objectKeyList.length; index < length; index += 1) {
+    pairBuffer = '';
+
+    if (index !== 0) pairBuffer += ', ';
+
+    objectKey = objectKeyList[index];
+    objectValue = object[objectKey];
+
+    if (!writeNode(state, level, objectKey, false, false)) {
+      continue; // Skip this pair because of invalid key;
+    }
+
+    if (state.dump.length > 1024) pairBuffer += '? ';
+
+    pairBuffer += state.dump + ': ';
+
+    if (!writeNode(state, level, objectValue, false, false)) {
+      continue; // Skip this pair because of invalid value.
+    }
+
+    pairBuffer += state.dump;
+
+    // Both key and value are valid.
+    _result += pairBuffer;
+  }
+
+  state.tag = _tag;
+  state.dump = '{' + _result + '}';
+}
+
+function writeBlockMapping(state, level, object, compact) {
+  var _result       = '',
+      _tag          = state.tag,
+      objectKeyList = Object.keys(object),
+      index,
+      length,
+      objectKey,
+      objectValue,
+      explicitPair,
+      pairBuffer;
+
+  // Allow sorting keys so that the output file is deterministic
+  if (state.sortKeys === true) {
+    // Default sorting
+    objectKeyList.sort();
+  } else if (typeof state.sortKeys === 'function') {
+    // Custom sort function
+    objectKeyList.sort(state.sortKeys);
+  } else if (state.sortKeys) {
+    // Something is wrong
+    throw new YAMLException('sortKeys must be a boolean or a function');
+  }
+
+  for (index = 0, length = objectKeyList.length; index < length; index += 1) {
+    pairBuffer = '';
+
+    if (!compact || index !== 0) {
+      pairBuffer += generateNextLine(state, level);
+    }
+
+    objectKey = objectKeyList[index];
+    objectValue = object[objectKey];
+
+    if (!writeNode(state, level + 1, objectKey, true, true, true)) {
+      continue; // Skip this pair because of invalid key.
+    }
+
+    explicitPair = (state.tag !== null && state.tag !== '?') ||
+                   (state.dump && state.dump.length > 1024);
+
+    if (explicitPair) {
+      if (state.dump && CHAR_LINE_FEED === state.dump.charCodeAt(0)) {
+        pairBuffer += '?';
+      } else {
+        pairBuffer += '? ';
+      }
+    }
+
+    pairBuffer += state.dump;
+
+    if (explicitPair) {
+      pairBuffer += generateNextLine(state, level);
+    }
+
+    if (!writeNode(state, level + 1, objectValue, true, explicitPair)) {
+      continue; // Skip this pair because of invalid value.
+    }
+
+    if (state.dump && CHAR_LINE_FEED === state.dump.charCodeAt(0)) {
+      pairBuffer += ':';
+    } else {
+      pairBuffer += ': ';
+    }
+
+    pairBuffer += state.dump;
+
+    // Both key and value are valid.
+    _result += pairBuffer;
+  }
+
+  state.tag = _tag;
+  state.dump = _result || '{}'; // Empty mapping if no valid pairs.
+}
+
+function detectType(state, object, explicit) {
+  var _result, typeList, index, length, type, style;
+
+  typeList = explicit ? state.explicitTypes : state.implicitTypes;
+
+  for (index = 0, length = typeList.length; index < length; index += 1) {
+    type = typeList[index];
+
+    if ((type.instanceOf  || type.predicate) &&
+        (!type.instanceOf || ((typeof object === 'object') && (object instanceof type.instanceOf))) &&
+        (!type.predicate  || type.predicate(object))) {
+
+      state.tag = explicit ? type.tag : '?';
+
+      if (type.represent) {
+        style = state.styleMap[type.tag] || type.defaultStyle;
+
+        if (_toString.call(type.represent) === '[object Function]') {
+          _result = type.represent(object, style);
+        } else if (_hasOwnProperty.call(type.represent, style)) {
+          _result = type.represent[style](object, style);
+        } else {
+          throw new YAMLException('!<' + type.tag + '> tag resolver accepts not "' + style + '" style');
+        }
+
+        state.dump = _result;
+      }
+
+      return true;
+    }
+  }
+
+  return false;
+}
+
+// Serializes `object` and writes it to global `result`.
+// Returns true on success, or false on invalid object.
+//
+function writeNode(state, level, object, block, compact, iskey) {
+  state.tag = null;
+  state.dump = object;
+
+  if (!detectType(state, object, false)) {
+    detectType(state, object, true);
+  }
+
+  var type = _toString.call(state.dump);
+
+  if (block) {
+    block = (state.flowLevel < 0 || state.flowLevel > level);
+  }
+
+  var objectOrArray = type === '[object Object]' || type === '[object Array]',
+      duplicateIndex,
+      duplicate;
+
+  if (objectOrArray) {
+    duplicateIndex = state.duplicates.indexOf(object);
+    duplicate = duplicateIndex !== -1;
+  }
+
+  if ((state.tag !== null && state.tag !== '?') || duplicate || (state.indent !== 2 && level > 0)) {
+    compact = false;
+  }
+
+  if (duplicate && state.usedDuplicates[duplicateIndex]) {
+    state.dump = '*ref_' + duplicateIndex;
+  } else {
+    if (objectOrArray && duplicate && !state.usedDuplicates[duplicateIndex]) {
+      state.usedDuplicates[duplicateIndex] = true;
+    }
+    if (type === '[object Object]') {
+      if (block && (Object.keys(state.dump).length !== 0)) {
+        writeBlockMapping(state, level, state.dump, compact);
+        if (duplicate) {
+          state.dump = '&ref_' + duplicateIndex + state.dump;
+        }
+      } else {
+        writeFlowMapping(state, level, state.dump);
+        if (duplicate) {
+          state.dump = '&ref_' + duplicateIndex + ' ' + state.dump;
+        }
+      }
+    } else if (type === '[object Array]') {
+      if (block && (state.dump.length !== 0)) {
+        writeBlockSequence(state, level, state.dump, compact);
+        if (duplicate) {
+          state.dump = '&ref_' + duplicateIndex + state.dump;
+        }
+      } else {
+        writeFlowSequence(state, level, state.dump);
+        if (duplicate) {
+          state.dump = '&ref_' + duplicateIndex + ' ' + state.dump;
+        }
+      }
+    } else if (type === '[object String]') {
+      if (state.tag !== '?') {
+        writeScalar(state, state.dump, level, iskey);
+      }
+    } else {
+      if (state.skipInvalid) return false;
+      throw new YAMLException('unacceptable kind of an object to dump ' + type);
+    }
+
+    if (state.tag !== null && state.tag !== '?') {
+      state.dump = '!<' + state.tag + '> ' + state.dump;
+    }
+  }
+
+  return true;
+}
+
+function getDuplicateReferences(object, state) {
+  var objects = [],
+      duplicatesIndexes = [],
+      index,
+      length;
+
+  inspectNode(object, objects, duplicatesIndexes);
+
+  for (index = 0, length = duplicatesIndexes.length; index < length; index += 1) {
+    state.duplicates.push(objects[duplicatesIndexes[index]]);
+  }
+  state.usedDuplicates = new Array(length);
+}
+
+function inspectNode(object, objects, duplicatesIndexes) {
+  var objectKeyList,
+      index,
+      length;
+
+  if (object !== null && typeof object === 'object') {
+    index = objects.indexOf(object);
+    if (index !== -1) {
+      if (duplicatesIndexes.indexOf(index) === -1) {
+        duplicatesIndexes.push(index);
+      }
+    } else {
+      objects.push(object);
+
+      if (Array.isArray(object)) {
+        for (index = 0, length = object.length; index < length; index += 1) {
+          inspectNode(object[index], objects, duplicatesIndexes);
+        }
+      } else {
+        objectKeyList = Object.keys(object);
+
+        for (index = 0, length = objectKeyList.length; index < length; index += 1) {
+          inspectNode(object[objectKeyList[index]], objects, duplicatesIndexes);
+        }
+      }
+    }
+  }
+}
+
+function dump(input, options) {
+  options = options || {};
+
+  var state = new State(options);
+
+  if (!state.noRefs) getDuplicateReferences(input, state);
+
+  if (writeNode(state, 0, input, true, true)) return state.dump + '\n';
+
+  return '';
+}
+
+function safeDump(input, options) {
+  return dump(input, common.extend({ schema: DEFAULT_SAFE_SCHEMA }, options));
+}
+
+module.exports.dump     = dump;
+module.exports.safeDump = safeDump;
+
+},{"./common":2,"./exception":4,"./schema/default_full":9,"./schema/default_safe":10}],4:[function(require,module,exports){
+// YAML error class. http://stackoverflow.com/questions/8458984
+//
+'use strict';
+
+function YAMLException(reason, mark) {
+  // Super constructor
+  Error.call(this);
+
+  // Include stack trace in error object
+  if (Error.captureStackTrace) {
+    // Chrome and NodeJS
+    Error.captureStackTrace(this, this.constructor);
+  } else {
+    // FF, IE 10+ and Safari 6+. Fallback for others
+    this.stack = (new Error()).stack || '';
+  }
+
+  this.name = 'YAMLException';
+  this.reason = reason;
+  this.mark = mark;
+  this.message = (this.reason || '(unknown reason)') + (this.mark ? ' ' + this.mark.toString() : '');
+}
+
+
+// Inherit from Error
+YAMLException.prototype = Object.create(Error.prototype);
+YAMLException.prototype.constructor = YAMLException;
+
+
+YAMLException.prototype.toString = function toString(compact) {
+  var result = this.name + ': ';
+
+  result += this.reason || '(unknown reason)';
+
+  if (!compact && this.mark) {
+    result += ' ' + this.mark.toString();
+  }
+
+  return result;
+};
+
+
+module.exports = YAMLException;
+
+},{}],5:[function(require,module,exports){
+'use strict';
+
+/*eslint-disable max-len,no-use-before-define*/
+
+var common              = require('./common');
+var YAMLException       = require('./exception');
+var Mark                = require('./mark');
+var DEFAULT_SAFE_SCHEMA = require('./schema/default_safe');
+var DEFAULT_FULL_SCHEMA = require('./schema/default_full');
+
+
+var _hasOwnProperty = Object.prototype.hasOwnProperty;
+
+
+var CONTEXT_FLOW_IN   = 1;
+var CONTEXT_FLOW_OUT  = 2;
+var CONTEXT_BLOCK_IN  = 3;
+var CONTEXT_BLOCK_OUT = 4;
+
+
+var CHOMPING_CLIP  = 1;
+var CHOMPING_STRIP = 2;
+var CHOMPING_KEEP  = 3;
+
+
+var PATTERN_NON_PRINTABLE         = /[\x00-\x08\x0B\x0C\x0E-\x1F\x7F-\x84\x86-\x9F\uFFFE\uFFFF]|[\uD800-\uDBFF](?![\uDC00-\uDFFF])|(?:[^\uD800-\uDBFF]|^)[\uDC00-\uDFFF]/;
+var PATTERN_NON_ASCII_LINE_BREAKS = /[\x85\u2028\u2029]/;
+var PATTERN_FLOW_INDICATORS       = /[,\[\]\{\}]/;
+var PATTERN_TAG_HANDLE            = /^(?:!|!!|![a-z\-]+!)$/i;
+var PATTERN_TAG_URI               = /^(?:!|[^,\[\]\{\}])(?:%[0-9a-f]{2}|[0-9a-z\-#;\/\?:@&=\+\$,_\.!~\*'\(\)\[\]])*$/i;
+
+
+function is_EOL(c) {
+  return (c === 0x0A/* LF */) || (c === 0x0D/* CR */);
+}
+
+function is_WHITE_SPACE(c) {
+  return (c === 0x09/* Tab */) || (c === 0x20/* Space */);
+}
+
+function is_WS_OR_EOL(c) {
+  return (c === 0x09/* Tab */) ||
+         (c === 0x20/* Space */) ||
+         (c === 0x0A/* LF */) ||
+         (c === 0x0D/* CR */);
+}
+
+function is_FLOW_INDICATOR(c) {
+  return c === 0x2C/* , */ ||
+         c === 0x5B/* [ */ ||
+         c === 0x5D/* ] */ ||
+         c === 0x7B/* { */ ||
+         c === 0x7D/* } */;
+}
+
+function fromHexCode(c) {
+  var lc;
+
+  if ((0x30/* 0 */ <= c) && (c <= 0x39/* 9 */)) {
+    return c - 0x30;
+  }
+
+  /*eslint-disable no-bitwise*/
+  lc = c | 0x20;
+
+  if ((0x61/* a */ <= lc) && (lc <= 0x66/* f */)) {
+    return lc - 0x61 + 10;
+  }
+
+  return -1;
+}
+
+function escapedHexLen(c) {
+  if (c === 0x78/* x */) { return 2; }
+  if (c === 0x75/* u */) { return 4; }
+  if (c === 0x55/* U */) { return 8; }
+  return 0;
+}
+
+function fromDecimalCode(c) {
+  if ((0x30/* 0 */ <= c) && (c <= 0x39/* 9 */)) {
+    return c - 0x30;
+  }
+
+  return -1;
+}
+
+function simpleEscapeSequence(c) {
+  return (c === 0x30/* 0 */) ? '\x00' :
+        (c === 0x61/* a */) ? '\x07' :
+        (c === 0x62/* b */) ? '\x08' :
+        (c === 0x74/* t */) ? '\x09' :
+        (c === 0x09/* Tab */) ? '\x09' :
+        (c === 0x6E/* n */) ? '\x0A' :
+        (c === 0x76/* v */) ? '\x0B' :
+        (c === 0x66/* f */) ? '\x0C' :
+        (c === 0x72/* r */) ? '\x0D' :
+        (c === 0x65/* e */) ? '\x1B' :
+        (c === 0x20/* Space */) ? ' ' :
+        (c === 0x22/* " */) ? '\x22' :
+        (c === 0x2F/* / */) ? '/' :
+        (c === 0x5C/* \ */) ? '\x5C' :
+        (c === 0x4E/* N */) ? '\x85' :
+        (c === 0x5F/* _ */) ? '\xA0' :
+        (c === 0x4C/* L */) ? '\u2028' :
+        (c === 0x50/* P */) ? '\u2029' : '';
+}
+
+function charFromCodepoint(c) {
+  if (c <= 0xFFFF) {
+    return String.fromCharCode(c);
+  }
+  // Encode UTF-16 surrogate pair
+  // https://en.wikipedia.org/wiki/UTF-16#Code_points_U.2B010000_to_U.2B10FFFF
+  return String.fromCharCode(((c - 0x010000) >> 10) + 0xD800,
+                             ((c - 0x010000) & 0x03FF) + 0xDC00);
+}
+
+var simpleEscapeCheck = new Array(256); // integer, for fast access
+var simpleEscapeMap = new Array(256);
+for (var i = 0; i < 256; i++) {
+  simpleEscapeCheck[i] = simpleEscapeSequence(i) ? 1 : 0;
+  simpleEscapeMap[i] = simpleEscapeSequence(i);
+}
+
+
+function State(input, options) {
+  this.input = input;
+
+  this.filename  = options['filename']  || null;
+  this.schema    = options['schema']    || DEFAULT_FULL_SCHEMA;
+  this.onWarning = options['onWarning'] || null;
+  this.legacy    = options['legacy']    || false;
+  this.json      = options['json']      || false;
+  this.listener  = options['listener']  || null;
+
+  this.implicitTypes = this.schema.compiledImplicit;
+  this.typeMap       = this.schema.compiledTypeMap;
+
+  this.length     = input.length;
+  this.position   = 0;
+  this.line       = 0;
+  this.lineStart  = 0;
+  this.lineIndent = 0;
+
+  this.documents = [];
+
+  /*
+  this.version;
+  this.checkLineBreaks;
+  this.tagMap;
+  this.anchorMap;
+  this.tag;
+  this.anchor;
+  this.kind;
+  this.result;*/
+
+}
+
+
+function generateError(state, message) {
+  return new YAMLException(
+    message,
+    new Mark(state.filename, state.input, state.position, state.line, (state.position - state.lineStart)));
+}
+
+function throwError(state, message) {
+  throw generateError(state, message);
+}
+
+function throwWarning(state, message) {
+  if (state.onWarning) {
+    state.onWarning.call(null, generateError(state, message));
+  }
+}
+
+
+var directiveHandlers = {
+
+  YAML: function handleYamlDirective(state, name, args) {
+
+    var match, major, minor;
+
+    if (state.version !== null) {
+      throwError(state, 'duplication of %YAML directive');
+    }
+
+    if (args.length !== 1) {
+      throwError(state, 'YAML directive accepts exactly one argument');
+    }
+
+    match = /^([0-9]+)\.([0-9]+)$/.exec(args[0]);
+
+    if (match === null) {
+      throwError(state, 'ill-formed argument of the YAML directive');
+    }
+
+    major = parseInt(match[1], 10);
+    minor = parseInt(match[2], 10);
+
+    if (major !== 1) {
+      throwError(state, 'unacceptable YAML version of the document');
+    }
+
+    state.version = args[0];
+    state.checkLineBreaks = (minor < 2);
+
+    if (minor !== 1 && minor !== 2) {
+      throwWarning(state, 'unsupported YAML version of the document');
+    }
+  },
+
+  TAG: function handleTagDirective(state, name, args) {
+
+    var handle, prefix;
+
+    if (args.length !== 2) {
+      throwError(state, 'TAG directive accepts exactly two arguments');
+    }
+
+    handle = args[0];
+    prefix = args[1];
+
+    if (!PATTERN_TAG_HANDLE.test(handle)) {
+      throwError(state, 'ill-formed tag handle (first argument) of the TAG directive');
+    }
+
+    if (_hasOwnProperty.call(state.tagMap, handle)) {
+      throwError(state, 'there is a previously declared suffix for "' + handle + '" tag handle');
+    }
+
+    if (!PATTERN_TAG_URI.test(prefix)) {
+      throwError(state, 'ill-formed tag prefix (second argument) of the TAG directive');
+    }
+
+    state.tagMap[handle] = prefix;
+  }
+};
+
+
+function captureSegment(state, start, end, checkJson) {
+  var _position, _length, _character, _result;
+
+  if (start < end) {
+    _result = state.input.slice(start, end);
+
+    if (checkJson) {
+      for (_position = 0, _length = _result.length;
+           _position < _length;
+           _position += 1) {
+        _character = _result.charCodeAt(_position);
+        if (!(_character === 0x09 ||
+              (0x20 <= _character && _character <= 0x10FFFF))) {
+          throwError(state, 'expected valid JSON character');
+        }
+      }
+    } else if (PATTERN_NON_PRINTABLE.test(_result)) {
+      throwError(state, 'the stream contains non-printable characters');
+    }
+
+    state.result += _result;
+  }
+}
+
+function mergeMappings(state, destination, source, overridableKeys) {
+  var sourceKeys, key, index, quantity;
+
+  if (!common.isObject(source)) {
+    throwError(state, 'cannot merge mappings; the provided source object is unacceptable');
+  }
+
+  sourceKeys = Object.keys(source);
+
+  for (index = 0, quantity = sourceKeys.length; index < quantity; index += 1) {
+    key = sourceKeys[index];
+
+    if (!_hasOwnProperty.call(destination, key)) {
+      destination[key] = source[key];
+      overridableKeys[key] = true;
+    }
+  }
+}
+
+function storeMappingPair(state, _result, overridableKeys, keyTag, keyNode, valueNode) {
+  var index, quantity;
+
+  keyNode = String(keyNode);
+
+  if (_result === null) {
+    _result = {};
+  }
+
+  if (keyTag === 'tag:yaml.org,2002:merge') {
+    if (Array.isArray(valueNode)) {
+      for (index = 0, quantity = valueNode.length; index < quantity; index += 1) {
+        mergeMappings(state, _result, valueNode[index], overridableKeys);
+      }
+    } else {
+      mergeMappings(state, _result, valueNode, overridableKeys);
+    }
+  } else {
+    if (!state.json &&
+        !_hasOwnProperty.call(overridableKeys, keyNode) &&
+        _hasOwnProperty.call(_result, keyNode)) {
+      throwError(state, 'duplicated mapping key');
+    }
+    _result[keyNode] = valueNode;
+    delete overridableKeys[keyNode];
+  }
+
+  return _result;
+}
+
+function readLineBreak(state) {
+  var ch;
+
+  ch = state.input.charCodeAt(state.position);
+
+  if (ch === 0x0A/* LF */) {
+    state.position++;
+  } else if (ch === 0x0D/* CR */) {
+    state.position++;
+    if (state.input.charCodeAt(state.position) === 0x0A/* LF */) {
+      state.position++;
+    }
+  } else {
+    throwError(state, 'a line break is expected');
+  }
+
+  state.line += 1;
+  state.lineStart = state.position;
+}
+
+function skipSeparationSpace(state, allowComments, checkIndent) {
+  var lineBreaks = 0,
+      ch = state.input.charCodeAt(state.position);
+
+  while (ch !== 0) {
+    while (is_WHITE_SPACE(ch)) {
+      ch = state.input.charCodeAt(++state.position);
+    }
+
+    if (allowComments && ch === 0x23/* # */) {
+      do {
+        ch = state.input.charCodeAt(++state.position);
+      } while (ch !== 0x0A/* LF */ && ch !== 0x0D/* CR */ && ch !== 0);
+    }
+
+    if (is_EOL(ch)) {
+      readLineBreak(state);
+
+      ch = state.input.charCodeAt(state.position);
+      lineBreaks++;
+      state.lineIndent = 0;
+
+      while (ch === 0x20/* Space */) {
+        state.lineIndent++;
+        ch = state.input.charCodeAt(++state.position);
+      }
+    } else {
+      break;
+    }
+  }
+
+  if (checkIndent !== -1 && lineBreaks !== 0 && state.lineIndent < checkIndent) {
+    throwWarning(state, 'deficient indentation');
+  }
+
+  return lineBreaks;
+}
+
+function testDocumentSeparator(state) {
+  var _position = state.position,
+      ch;
+
+  ch = state.input.charCodeAt(_position);
+
+  // Condition state.position === state.lineStart is tested
+  // in parent on each call, for efficiency. No needs to test here again.
+  if ((ch === 0x2D/* - */ || ch === 0x2E/* . */) &&
+      ch === state.input.charCodeAt(_position + 1) &&
+      ch === state.input.charCodeAt(_position + 2)) {
+
+    _position += 3;
+
+    ch = state.input.charCodeAt(_position);
+
+    if (ch === 0 || is_WS_OR_EOL(ch)) {
+      return true;
+    }
+  }
+
+  return false;
+}
+
+function writeFoldedLines(state, count) {
+  if (count === 1) {
+    state.result += ' ';
+  } else if (count > 1) {
+    state.result += common.repeat('\n', count - 1);
+  }
+}
+
+
+function readPlainScalar(state, nodeIndent, withinFlowCollection) {
+  var preceding,
+      following,
+      captureStart,
+      captureEnd,
+      hasPendingContent,
+      _line,
+      _lineStart,
+      _lineIndent,
+      _kind = state.kind,
+      _result = state.result,
+      ch;
+
+  ch = state.input.charCodeAt(state.position);
+
+  if (is_WS_OR_EOL(ch)      ||
+      is_FLOW_INDICATOR(ch) ||
+      ch === 0x23/* # */    ||
+      ch === 0x26/* & */    ||
+      ch === 0x2A/* * */    ||
+      ch === 0x21/* ! */    ||
+      ch === 0x7C/* | */    ||
+      ch === 0x3E/* > */    ||
+      ch === 0x27/* ' */    ||
+      ch === 0x22/* " */    ||
+      ch === 0x25/* % */    ||
+      ch === 0x40/* @ */    ||
+      ch === 0x60/* ` */) {
+    return false;
+  }
+
+  if (ch === 0x3F/* ? */ || ch === 0x2D/* - */) {
+    following = state.input.charCodeAt(state.position + 1);
+
+    if (is_WS_OR_EOL(following) ||
+        withinFlowCollection && is_FLOW_INDICATOR(following)) {
+      return false;
+    }
+  }
+
+  state.kind = 'scalar';
+  state.result = '';
+  captureStart = captureEnd = state.position;
+  hasPendingContent = false;
+
+  while (ch !== 0) {
+    if (ch === 0x3A/* : */) {
+      following = state.input.charCodeAt(state.position + 1);
+
+      if (is_WS_OR_EOL(following) ||
+          withinFlowCollection && is_FLOW_INDICATOR(following)) {
+        break;
+      }
+
+    } else if (ch === 0x23/* # */) {
+      preceding = state.input.charCodeAt(state.position - 1);
+
+      if (is_WS_OR_EOL(preceding)) {
+        break;
+      }
+
+    } else if ((state.position === state.lineStart && testDocumentSeparator(state)) ||
+               withinFlowCollection && is_FLOW_INDICATOR(ch)) {
+      break;
+
+    } else if (is_EOL(ch)) {
+      _line = state.line;
+      _lineStart = state.lineStart;
+      _lineIndent = state.lineIndent;
+      skipSeparationSpace(state, false, -1);
+
+      if (state.lineIndent >= nodeIndent) {
+        hasPendingContent = true;
+        ch = state.input.charCodeAt(state.position);
+        continue;
+      } else {
+        state.position = captureEnd;
+        state.line = _line;
+        state.lineStart = _lineStart;
+        state.lineIndent = _lineIndent;
+        break;
+      }
+    }
+
+    if (hasPendingContent) {
+      captureSegment(state, captureStart, captureEnd, false);
+      writeFoldedLines(state, state.line - _line);
+      captureStart = captureEnd = state.position;
+      hasPendingContent = false;
+    }
+
+    if (!is_WHITE_SPACE(ch)) {
+      captureEnd = state.position + 1;
+    }
+
+    ch = state.input.charCodeAt(++state.position);
+  }
+
+  captureSegment(state, captureStart, captureEnd, false);
+
+  if (state.result) {
+    return true;
+  }
+
+  state.kind = _kind;
+  state.result = _result;
+  return false;
+}
+
+function readSingleQuotedScalar(state, nodeIndent) {
+  var ch,
+      captureStart, captureEnd;
+
+  ch = state.input.charCodeAt(state.position);
+
+  if (ch !== 0x27/* ' */) {
+    return false;
+  }
+
+  state.kind = 'scalar';
+  state.result = '';
+  state.position++;
+  captureStart = captureEnd = state.position;
+
+  while ((ch = state.input.charCodeAt(state.position)) !== 0) {
+    if (ch === 0x27/* ' */) {
+      captureSegment(state, captureStart, state.position, true);
+      ch = state.input.charCodeAt(++state.position);
+
+      if (ch === 0x27/* ' */) {
+        captureStart = captureEnd = state.position;
+        state.position++;
+      } else {
+        return true;
+      }
+
+    } else if (is_EOL(ch)) {
+      captureSegment(state, captureStart, captureEnd, true);
+      writeFoldedLines(state, skipSeparationSpace(state, false, nodeIndent));
+      captureStart = captureEnd = state.position;
+
+    } else if (state.position === state.lineStart && testDocumentSeparator(state)) {
+      throwError(state, 'unexpected end of the document within a single quoted scalar');
+
+    } else {
+      state.position++;
+      captureEnd = state.position;
+    }
+  }
+
+  throwError(state, 'unexpected end of the stream within a single quoted scalar');
+}
+
+function readDoubleQuotedScalar(state, nodeIndent) {
+  var captureStart,
+      captureEnd,
+      hexLength,
+      hexResult,
+      tmp,
+      ch;
+
+  ch = state.input.charCodeAt(state.position);
+
+  if (ch !== 0x22/* " */) {
+    return false;
+  }
+
+  state.kind = 'scalar';
+  state.result = '';
+  state.position++;
+  captureStart = captureEnd = state.position;
+
+  while ((ch = state.input.charCodeAt(state.position)) !== 0) {
+    if (ch === 0x22/* " */) {
+      captureSegment(state, captureStart, state.position, true);
+      state.position++;
+      return true;
+
+    } else if (ch === 0x5C/* \ */) {
+      captureSegment(state, captureStart, state.position, true);
+      ch = state.input.charCodeAt(++state.position);
+
+      if (is_EOL(ch)) {
+        skipSeparationSpace(state, false, nodeIndent);
+
+        // TODO: rework to inline fn with no type cast?
+      } else if (ch < 256 && simpleEscapeCheck[ch]) {
+        state.result += simpleEscapeMap[ch];
+        state.position++;
+
+      } else if ((tmp = escapedHexLen(ch)) > 0) {
+        hexLength = tmp;
+        hexResult = 0;
+
+        for (; hexLength > 0; hexLength--) {
+          ch = state.input.charCodeAt(++state.position);
+
+          if ((tmp = fromHexCode(ch)) >= 0) {
+            hexResult = (hexResult << 4) + tmp;
+
+          } else {
+            throwError(state, 'expected hexadecimal character');
+          }
+        }
+
+        state.result += charFromCodepoint(hexResult);
+
+        state.position++;
+
+      } else {
+        throwError(state, 'unknown escape sequence');
+      }
+
+      captureStart = captureEnd = state.position;
+
+    } else if (is_EOL(ch)) {
+      captureSegment(state, captureStart, captureEnd, true);
+      writeFoldedLines(state, skipSeparationSpace(state, false, nodeIndent));
+      captureStart = captureEnd = state.position;
+
+    } else if (state.position === state.lineStart && testDocumentSeparator(state)) {
+      throwError(state, 'unexpected end of the document within a double quoted scalar');
+
+    } else {
+      state.position++;
+      captureEnd = state.position;
+    }
+  }
+
+  throwError(state, 'unexpected end of the stream within a double quoted scalar');
+}
+
+function readFlowCollection(state, nodeIndent) {
+  var readNext = true,
+      _line,
+      _tag     = state.tag,
+      _result,
+      _anchor  = state.anchor,
+      following,
+      terminator,
+      isPair,
+      isExplicitPair,
+      isMapping,
+      overridableKeys = {},
+      keyNode,
+      keyTag,
+      valueNode,
+      ch;
+
+  ch = state.input.charCodeAt(state.position);
+
+  if (ch === 0x5B/* [ */) {
+    terminator = 0x5D;/* ] */
+    isMapping = false;
+    _result = [];
+  } else if (ch === 0x7B/* { */) {
+    terminator = 0x7D;/* } */
+    isMapping = true;
+    _result = {};
+  } else {
+    return false;
+  }
+
+  if (state.anchor !== null) {
+    state.anchorMap[state.anchor] = _result;
+  }
+
+  ch = state.input.charCodeAt(++state.position);
+
+  while (ch !== 0) {
+    skipSeparationSpace(state, true, nodeIndent);
+
+    ch = state.input.charCodeAt(state.position);
+
+    if (ch === terminator) {
+      state.position++;
+      state.tag = _tag;
+      state.anchor = _anchor;
+      state.kind = isMapping ? 'mapping' : 'sequence';
+      state.result = _result;
+      return true;
+    } else if (!readNext) {
+      throwError(state, 'missed comma between flow collection entries');
+    }
+
+    keyTag = keyNode = valueNode = null;
+    isPair = isExplicitPair = false;
+
+    if (ch === 0x3F/* ? */) {
+      following = state.input.charCodeAt(state.position + 1);
+
+      if (is_WS_OR_EOL(following)) {
+        isPair = isExplicitPair = true;
+        state.position++;
+        skipSeparationSpace(state, true, nodeIndent);
+      }
+    }
+
+    _line = state.line;
+    composeNode(state, nodeIndent, CONTEXT_FLOW_IN, false, true);
+    keyTag = state.tag;
+    keyNode = state.result;
+    skipSeparationSpace(state, true, nodeIndent);
+
+    ch = state.input.charCodeAt(state.position);
+
+    if ((isExplicitPair || state.line === _line) && ch === 0x3A/* : */) {
+      isPair = true;
+      ch = state.input.charCodeAt(++state.position);
+      skipSeparationSpace(state, true, nodeIndent);
+      composeNode(state, nodeIndent, CONTEXT_FLOW_IN, false, true);
+      valueNode = state.result;
+    }
+
+    if (isMapping) {
+      storeMappingPair(state, _result, overridableKeys, keyTag, keyNode, valueNode);
+    } else if (isPair) {
+      _result.push(storeMappingPair(state, null, overridableKeys, keyTag, keyNode, valueNode));
+    } else {
+      _result.push(keyNode);
+    }
+
+    skipSeparationSpace(state, true, nodeIndent);
+
+    ch = state.input.charCodeAt(state.position);
+
+    if (ch === 0x2C/* , */) {
+      readNext = true;
+      ch = state.input.charCodeAt(++state.position);
+    } else {
+      readNext = false;
+    }
+  }
+
+  throwError(state, 'unexpected end of the stream within a flow collection');
+}
+
+function readBlockScalar(state, nodeIndent) {
+  var captureStart,
+      folding,
+      chomping       = CHOMPING_CLIP,
+      didReadContent = false,
+      detectedIndent = false,
+      textIndent     = nodeIndent,
+      emptyLines     = 0,
+      atMoreIndented = false,
+      tmp,
+      ch;
+
+  ch = state.input.charCodeAt(state.position);
+
+  if (ch === 0x7C/* | */) {
+    folding = false;
+  } else if (ch === 0x3E/* > */) {
+    folding = true;
+  } else {
+    return false;
+  }
+
+  state.kind = 'scalar';
+  state.result = '';
+
+  while (ch !== 0) {
+    ch = state.input.charCodeAt(++state.position);
+
+    if (ch === 0x2B/* + */ || ch === 0x2D/* - */) {
+      if (CHOMPING_CLIP === chomping) {
+        chomping = (ch === 0x2B/* + */) ? CHOMPING_KEEP : CHOMPING_STRIP;
+      } else {
+        throwError(state, 'repeat of a chomping mode identifier');
+      }
+
+    } else if ((tmp = fromDecimalCode(ch)) >= 0) {
+      if (tmp === 0) {
+        throwError(state, 'bad explicit indentation width of a block scalar; it cannot be less than one');
+      } else if (!detectedIndent) {
+        textIndent = nodeIndent + tmp - 1;
+        detectedIndent = true;
+      } else {
+        throwError(state, 'repeat of an indentation width identifier');
+      }
+
+    } else {
+      break;
+    }
+  }
+
+  if (is_WHITE_SPACE(ch)) {
+    do { ch = state.input.charCodeAt(++state.position); }
+    while (is_WHITE_SPACE(ch));
+
+    if (ch === 0x23/* # */) {
+      do { ch = state.input.charCodeAt(++state.position); }
+      while (!is_EOL(ch) && (ch !== 0));
+    }
+  }
+
+  while (ch !== 0) {
+    readLineBreak(state);
+    state.lineIndent = 0;
+
+    ch = state.input.charCodeAt(state.position);
+
+    while ((!detectedIndent || state.lineIndent < textIndent) &&
+           (ch === 0x20/* Space */)) {
+      state.lineIndent++;
+      ch = state.input.charCodeAt(++state.position);
+    }
+
+    if (!detectedIndent && state.lineIndent > textIndent) {
+      textIndent = state.lineIndent;
+    }
+
+    if (is_EOL(ch)) {
+      emptyLines++;
+      continue;
+    }
+
+    // End of the scalar.
+    if (state.lineIndent < textIndent) {
+
+      // Perform the chomping.
+      if (chomping === CHOMPING_KEEP) {
+        state.result += common.repeat('\n', didReadContent ? 1 + emptyLines : emptyLines);
+      } else if (chomping === CHOMPING_CLIP) {
+        if (didReadContent) { // i.e. only if the scalar is not empty.
+          state.result += '\n';
+        }
+      }
+
+      // Break this `while` cycle and go to the funciton's epilogue.
+      break;
+    }
+
+    // Folded style: use fancy rules to handle line breaks.
+    if (folding) {
+
+      // Lines starting with white space characters (more-indented lines) are not folded.
+      if (is_WHITE_SPACE(ch)) {
+        atMoreIndented = true;
+        // except for the first content line (cf. Example 8.1)
+        state.result += common.repeat('\n', didReadContent ? 1 + emptyLines : emptyLines);
+
+      // End of more-indented block.
+      } else if (atMoreIndented) {
+        atMoreIndented = false;
+        state.result += common.repeat('\n', emptyLines + 1);
+
+      // Just one line break - perceive as the same line.
+      } else if (emptyLines === 0) {
+        if (didReadContent) { // i.e. only if we have already read some scalar content.
+          state.result += ' ';
+        }
+
+      // Several line breaks - perceive as different lines.
+      } else {
+        state.result += common.repeat('\n', emptyLines);
+      }
+
+    // Literal style: just add exact number of line breaks between content lines.
+    } else {
+      // Keep all line breaks except the header line break.
+      state.result += common.repeat('\n', didReadContent ? 1 + emptyLines : emptyLines);
+    }
+
+    didReadContent = true;
+    detectedIndent = true;
+    emptyLines = 0;
+    captureStart = state.position;
+
+    while (!is_EOL(ch) && (ch !== 0)) {
+      ch = state.input.charCodeAt(++state.position);
+    }
+
+    captureSegment(state, captureStart, state.position, false);
+  }
+
+  return true;
+}
+
+function readBlockSequence(state, nodeIndent) {
+  var _line,
+      _tag      = state.tag,
+      _anchor   = state.anchor,
+      _result   = [],
+      following,
+      detected  = false,
+      ch;
+
+  if (state.anchor !== null) {
+    state.anchorMap[state.anchor] = _result;
+  }
+
+  ch = state.input.charCodeAt(state.position);
+
+  while (ch !== 0) {
+
+    if (ch !== 0x2D/* - */) {
+      break;
+    }
+
+    following = state.input.charCodeAt(state.position + 1);
+
+    if (!is_WS_OR_EOL(following)) {
+      break;
+    }
+
+    detected = true;
+    state.position++;
+
+    if (skipSeparationSpace(state, true, -1)) {
+      if (state.lineIndent <= nodeIndent) {
+        _result.push(null);
+        ch = state.input.charCodeAt(state.position);
+        continue;
+      }
+    }
+
+    _line = state.line;
+    composeNode(state, nodeIndent, CONTEXT_BLOCK_IN, false, true);
+    _result.push(state.result);
+    skipSeparationSpace(state, true, -1);
+
+    ch = state.input.charCodeAt(state.position);
+
+    if ((state.line === _line || state.lineIndent > nodeIndent) && (ch !== 0)) {
+      throwError(state, 'bad indentation of a sequence entry');
+    } else if (state.lineIndent < nodeIndent) {
+      break;
+    }
+  }
+
+  if (detected) {
+    state.tag = _tag;
+    state.anchor = _anchor;
+    state.kind = 'sequence';
+    state.result = _result;
+    return true;
+  }
+  return false;
+}
+
+function readBlockMapping(state, nodeIndent, flowIndent) {
+  var following,
+      allowCompact,
+      _line,
+      _tag          = state.tag,
+      _anchor       = state.anchor,
+      _result       = {},
+      overridableKeys = {},
+      keyTag        = null,
+      keyNode       = null,
+      valueNode     = null,
+      atExplicitKey = false,
+      detected      = false,
+      ch;
+
+  if (state.anchor !== null) {
+    state.anchorMap[state.anchor] = _result;
+  }
+
+  ch = state.input.charCodeAt(state.position);
+
+  while (ch !== 0) {
+    following = state.input.charCodeAt(state.position + 1);
+    _line = state.line; // Save the current line.
+
+    //
+    // Explicit notation case. There are two separate blocks:
+    // first for the key (denoted by "?") and second for the value (denoted by ":")
+    //
+    if ((ch === 0x3F/* ? */ || ch === 0x3A/* : */) && is_WS_OR_EOL(following)) {
+
+      if (ch === 0x3F/* ? */) {
+        if (atExplicitKey) {
+          storeMappingPair(state, _result, overridableKeys, keyTag, keyNode, null);
+          keyTag = keyNode = valueNode = null;
+        }
+
+        detected = true;
+        atExplicitKey = true;
+        allowCompact = true;
+
+      } else if (atExplicitKey) {
+        // i.e. 0x3A/* : */ === character after the explicit key.
+        atExplicitKey = false;
+        allowCompact = true;
+
+      } else {
+        throwError(state, 'incomplete explicit mapping pair; a key node is missed');
+      }
+
+      state.position += 1;
+      ch = following;
+
+    //
+    // Implicit notation case. Flow-style node as the key first, then ":", and the value.
+    //
+    } else if (composeNode(state, flowIndent, CONTEXT_FLOW_OUT, false, true)) {
+
+      if (state.line === _line) {
+        ch = state.input.charCodeAt(state.position);
+
+        while (is_WHITE_SPACE(ch)) {
+          ch = state.input.charCodeAt(++state.position);
+        }
+
+        if (ch === 0x3A/* : */) {
+          ch = state.input.charCodeAt(++state.position);
+
+          if (!is_WS_OR_EOL(ch)) {
+            throwError(state, 'a whitespace character is expected after the key-value separator within a block mapping');
+          }
+
+          if (atExplicitKey) {
+            storeMappingPair(state, _result, overridableKeys, keyTag, keyNode, null);
+            keyTag = keyNode = valueNode = null;
+          }
+
+          detected = true;
+          atExplicitKey = false;
+          allowCompact = false;
+          keyTag = state.tag;
+          keyNode = state.result;
+
+        } else if (detected) {
+          throwError(state, 'can not read an implicit mapping pair; a colon is missed');
+
+        } else {
+          state.tag = _tag;
+          state.anchor = _anchor;
+          return true; // Keep the result of `composeNode`.
+        }
+
+      } else if (detected) {
+        throwError(state, 'can not read a block mapping entry; a multiline key may not be an implicit key');
+
+      } else {
+        state.tag = _tag;
+        state.anchor = _anchor;
+        return true; // Keep the result of `composeNode`.
+      }
+
+    } else {
+      break; // Reading is done. Go to the epilogue.
+    }
+
+    //
+    // Common reading code for both explicit and implicit notations.
+    //
+    if (state.line === _line || state.lineIndent > nodeIndent) {
+      if (composeNode(state, nodeIndent, CONTEXT_BLOCK_OUT, true, allowCompact)) {
+        if (atExplicitKey) {
+          keyNode = state.result;
+        } else {
+          valueNode = state.result;
+        }
+      }
+
+      if (!atExplicitKey) {
+        storeMappingPair(state, _result, overridableKeys, keyTag, keyNode, valueNode);
+        keyTag = keyNode = valueNode = null;
+      }
+
+      skipSeparationSpace(state, true, -1);
+      ch = state.input.charCodeAt(state.position);
+    }
+
+    if (state.lineIndent > nodeIndent && (ch !== 0)) {
+      throwError(state, 'bad indentation of a mapping entry');
+    } else if (state.lineIndent < nodeIndent) {
+      break;
+    }
+  }
+
+  //
+  // Epilogue.
+  //
+
+  // Special case: last mapping's node contains only the key in explicit notation.
+  if (atExplicitKey) {
+    storeMappingPair(state, _result, overridableKeys, keyTag, keyNode, null);
+  }
+
+  // Expose the resulting mapping.
+  if (detected) {
+    state.tag = _tag;
+    state.anchor = _anchor;
+    state.kind = 'mapping';
+    state.result = _result;
+  }
+
+  return detected;
+}
+
+function readTagProperty(state) {
+  var _position,
+      isVerbatim = false,
+      isNamed    = false,
+      tagHandle,
+      tagName,
+      ch;
+
+  ch = state.input.charCodeAt(state.position);
+
+  if (ch !== 0x21/* ! */) return false;
+
+  if (state.tag !== null) {
+    throwError(state, 'duplication of a tag property');
+  }
+
+  ch = state.input.charCodeAt(++state.position);
+
+  if (ch === 0x3C/* < */) {
+    isVerbatim = true;
+    ch = state.input.charCodeAt(++state.position);
+
+  } else if (ch === 0x21/* ! */) {
+    isNamed = true;
+    tagHandle = '!!';
+    ch = state.input.charCodeAt(++state.position);
+
+  } else {
+    tagHandle = '!';
+  }
+
+  _position = state.position;
+
+  if (isVerbatim) {
+    do { ch = state.input.charCodeAt(++state.position); }
+    while (ch !== 0 && ch !== 0x3E/* > */);
+
+    if (state.position < state.length) {
+      tagName = state.input.slice(_position, state.position);
+      ch = state.input.charCodeAt(++state.position);
+    } else {
+      throwError(state, 'unexpected end of the stream within a verbatim tag');
+    }
+  } else {
+    while (ch !== 0 && !is_WS_OR_EOL(ch)) {
+
+      if (ch === 0x21/* ! */) {
+        if (!isNamed) {
+          tagHandle = state.input.slice(_position - 1, state.position + 1);
+
+          if (!PATTERN_TAG_HANDLE.test(tagHandle)) {
+            throwError(state, 'named tag handle cannot contain such characters');
+          }
+
+          isNamed = true;
+          _position = state.position + 1;
+        } else {
+          throwError(state, 'tag suffix cannot contain exclamation marks');
+        }
+      }
+
+      ch = state.input.charCodeAt(++state.position);
+    }
+
+    tagName = state.input.slice(_position, state.position);
+
+    if (PATTERN_FLOW_INDICATORS.test(tagName)) {
+      throwError(state, 'tag suffix cannot contain flow indicator characters');
+    }
+  }
+
+  if (tagName && !PATTERN_TAG_URI.test(tagName)) {
+    throwError(state, 'tag name cannot contain such characters: ' + tagName);
+  }
+
+  if (isVerbatim) {
+    state.tag = tagName;
+
+  } else if (_hasOwnProperty.call(state.tagMap, tagHandle)) {
+    state.tag = state.tagMap[tagHandle] + tagName;
+
+  } else if (tagHandle === '!') {
+    state.tag = '!' + tagName;
+
+  } else if (tagHandle === '!!') {
+    state.tag = 'tag:yaml.org,2002:' + tagName;
+
+  } else {
+    throwError(state, 'undeclared tag handle "' + tagHandle + '"');
+  }
+
+  return true;
+}
+
+function readAnchorProperty(state) {
+  var _position,
+      ch;
+
+  ch = state.input.charCodeAt(state.position);
+
+  if (ch !== 0x26/* & */) return false;
+
+  if (state.anchor !== null) {
+    throwError(state, 'duplication of an anchor property');
+  }
+
+  ch = state.input.charCodeAt(++state.position);
+  _position = state.position;
+
+  while (ch !== 0 && !is_WS_OR_EOL(ch) && !is_FLOW_INDICATOR(ch)) {
+    ch = state.input.charCodeAt(++state.position);
+  }
+
+  if (state.position === _position) {
+    throwError(state, 'name of an anchor node must contain at least one character');
+  }
+
+  state.anchor = state.input.slice(_position, state.position);
+  return true;
+}
+
+function readAlias(state) {
+  var _position, alias,
+      ch;
+
+  ch = state.input.charCodeAt(state.position);
+
+  if (ch !== 0x2A/* * */) return false;
+
+  ch = state.input.charCodeAt(++state.position);
+  _position = state.position;
+
+  while (ch !== 0 && !is_WS_OR_EOL(ch) && !is_FLOW_INDICATOR(ch)) {
+    ch = state.input.charCodeAt(++state.position);
+  }
+
+  if (state.position === _position) {
+    throwError(state, 'name of an alias node must contain at least one character');
+  }
+
+  alias = state.input.slice(_position, state.position);
+
+  if (!state.anchorMap.hasOwnProperty(alias)) {
+    throwError(state, 'unidentified alias "' + alias + '"');
+  }
+
+  state.result = state.anchorMap[alias];
+  skipSeparationSpace(state, true, -1);
+  return true;
+}
+
+function composeNode(state, parentIndent, nodeContext, allowToSeek, allowCompact) {
+  var allowBlockStyles,
+      allowBlockScalars,
+      allowBlockCollections,
+      indentStatus = 1, // 1: this>parent, 0: this=parent, -1: this<parent
+      atNewLine  = false,
+      hasContent = false,
+      typeIndex,
+      typeQuantity,
+      type,
+      flowIndent,
+      blockIndent;
+
+  if (state.listener !== null) {
+    state.listener('open', state);
+  }
+
+  state.tag    = null;
+  state.anchor = null;
+  state.kind   = null;
+  state.result = null;
+
+  allowBlockStyles = allowBlockScalars = allowBlockCollections =
+    CONTEXT_BLOCK_OUT === nodeContext ||
+    CONTEXT_BLOCK_IN  === nodeContext;
+
+  if (allowToSeek) {
+    if (skipSeparationSpace(state, true, -1)) {
+      atNewLine = true;
+
+      if (state.lineIndent > parentIndent) {
+        indentStatus = 1;
+      } else if (state.lineIndent === parentIndent) {
+        indentStatus = 0;
+      } else if (state.lineIndent < parentIndent) {
+        indentStatus = -1;
+      }
+    }
+  }
+
+  if (indentStatus === 1) {
+    while (readTagProperty(state) || readAnchorProperty(state)) {
+      if (skipSeparationSpace(state, true, -1)) {
+        atNewLine = true;
+        allowBlockCollections = allowBlockStyles;
+
+        if (state.lineIndent > parentIndent) {
+          indentStatus = 1;
+        } else if (state.lineIndent === parentIndent) {
+          indentStatus = 0;
+        } else if (state.lineIndent < parentIndent) {
+          indentStatus = -1;
+        }
+      } else {
+        allowBlockCollections = false;
+      }
+    }
+  }
+
+  if (allowBlockCollections) {
+    allowBlockCollections = atNewLine || allowCompact;
+  }
+
+  if (indentStatus === 1 || CONTEXT_BLOCK_OUT === nodeContext) {
+    if (CONTEXT_FLOW_IN === nodeContext || CONTEXT_FLOW_OUT === nodeContext) {
+      flowIndent = parentIndent;
+    } else {
+      flowIndent = parentIndent + 1;
+    }
+
+    blockIndent = state.position - state.lineStart;
+
+    if (indentStatus === 1) {
+      if (allowBlockCollections &&
+          (readBlockSequence(state, blockIndent) ||
+           readBlockMapping(state, blockIndent, flowIndent)) ||
+          readFlowCollection(state, flowIndent)) {
+        hasContent = true;
+      } else {
+        if ((allowBlockScalars && readBlockScalar(state, flowIndent)) ||
+            readSingleQuotedScalar(state, flowIndent) ||
+            readDoubleQuotedScalar(state, flowIndent)) {
+          hasContent = true;
+
+        } else if (readAlias(state)) {
+          hasContent = true;
+
+          if (state.tag !== null || state.anchor !== null) {
+            throwError(state, 'alias node should not have any properties');
+          }
+
+        } else if (readPlainScalar(state, flowIndent, CONTEXT_FLOW_IN === nodeContext)) {
+          hasContent = true;
+
+          if (state.tag === null) {
+            state.tag = '?';
+          }
+        }
+
+        if (state.anchor !== null) {
+          state.anchorMap[state.anchor] = state.result;
+        }
+      }
+    } else if (indentStatus === 0) {
+      // Special case: block sequences are allowed to have same indentation level as the parent.
+      // http://www.yaml.org/spec/1.2/spec.html#id2799784
+      hasContent = allowBlockCollections && readBlockSequence(state, blockIndent);
+    }
+  }
+
+  if (state.tag !== null && state.tag !== '!') {
+    if (state.tag === '?') {
+      for (typeIndex = 0, typeQuantity = state.implicitTypes.length;
+           typeIndex < typeQuantity;
+           typeIndex += 1) {
+        type = state.implicitTypes[typeIndex];
+
+        // Implicit resolving is not allowed for non-scalar types, and '?'
+        // non-specific tag is only assigned to plain scalars. So, it isn't
+        // needed to check for 'kind' conformity.
+
+        if (type.resolve(state.result)) { // `state.result` updated in resolver if matched
+          state.result = type.construct(state.result);
+          state.tag = type.tag;
+          if (state.anchor !== null) {
+            state.anchorMap[state.anchor] = state.result;
+          }
+          break;
+        }
+      }
+    } else if (_hasOwnProperty.call(state.typeMap, state.tag)) {
+      type = state.typeMap[state.tag];
+
+      if (state.result !== null && type.kind !== state.kind) {
+        throwError(state, 'unacceptable node kind for !<' + state.tag + '> tag; it should be "' + type.kind + '", not "' + state.kind + '"');
+      }
+
+      if (!type.resolve(state.result)) { // `state.result` updated in resolver if matched
+        throwError(state, 'cannot resolve a node with !<' + state.tag + '> explicit tag');
+      } else {
+        state.result = type.construct(state.result);
+        if (state.anchor !== null) {
+          state.anchorMap[state.anchor] = state.result;
+        }
+      }
+    } else {
+      throwError(state, 'unknown tag !<' + state.tag + '>');
+    }
+  }
+
+  if (state.listener !== null) {
+    state.listener('close', state);
+  }
+  return state.tag !== null ||  state.anchor !== null || hasContent;
+}
+
+function readDocument(state) {
+  var documentStart = state.position,
+      _position,
+      directiveName,
+      directiveArgs,
+      hasDirectives = false,
+      ch;
+
+  state.version = null;
+  state.checkLineBreaks = state.legacy;
+  state.tagMap = {};
+  state.anchorMap = {};
+
+  while ((ch = state.input.charCodeAt(state.position)) !== 0) {
+    skipSeparationSpace(state, true, -1);
+
+    ch = state.input.charCodeAt(state.position);
+
+    if (state.lineIndent > 0 || ch !== 0x25/* % */) {
+      break;
+    }
+
+    hasDirectives = true;
+    ch = state.input.charCodeAt(++state.position);
+    _position = state.position;
+
+    while (ch !== 0 && !is_WS_OR_EOL(ch)) {
+      ch = state.input.charCodeAt(++state.position);
+    }
+
+    directiveName = state.input.slice(_position, state.position);
+    directiveArgs = [];
+
+    if (directiveName.length < 1) {
+      throwError(state, 'directive name must not be less than one character in length');
+    }
+
+    while (ch !== 0) {
+      while (is_WHITE_SPACE(ch)) {
+        ch = state.input.charCodeAt(++state.position);
+      }
+
+      if (ch === 0x23/* # */) {
+        do { ch = state.input.charCodeAt(++state.position); }
+        while (ch !== 0 && !is_EOL(ch));
+        break;
+      }
+
+      if (is_EOL(ch)) break;
+
+      _position = state.position;
+
+      while (ch !== 0 && !is_WS_OR_EOL(ch)) {
+        ch = state.input.charCodeAt(++state.position);
+      }
+
+      directiveArgs.push(state.input.slice(_position, state.position));
+    }
+
+    if (ch !== 0) readLineBreak(state);
+
+    if (_hasOwnProperty.call(directiveHandlers, directiveName)) {
+      directiveHandlers[directiveName](state, directiveName, directiveArgs);
+    } else {
+      throwWarning(state, 'unknown document directive "' + directiveName + '"');
+    }
+  }
+
+  skipSeparationSpace(state, true, -1);
+
+  if (state.lineIndent === 0 &&
+      state.input.charCodeAt(state.position)     === 0x2D/* - */ &&
+      state.input.charCodeAt(state.position + 1) === 0x2D/* - */ &&
+      state.input.charCodeAt(state.position + 2) === 0x2D/* - */) {
+    state.position += 3;
+    skipSeparationSpace(state, true, -1);
+
+  } else if (hasDirectives) {
+    throwError(state, 'directives end mark is expected');
+  }
+
+  composeNode(state, state.lineIndent - 1, CONTEXT_BLOCK_OUT, false, true);
+  skipSeparationSpace(state, true, -1);
+
+  if (state.checkLineBreaks &&
+      PATTERN_NON_ASCII_LINE_BREAKS.test(state.input.slice(documentStart, state.position))) {
+    throwWarning(state, 'non-ASCII line breaks are interpreted as content');
+  }
+
+  state.documents.push(state.result);
+
+  if (state.position === state.lineStart && testDocumentSeparator(state)) {
+
+    if (state.input.charCodeAt(state.position) === 0x2E/* . */) {
+      state.position += 3;
+      skipSeparationSpace(state, true, -1);
+    }
+    return;
+  }
+
+  if (state.position < (state.length - 1)) {
+    throwError(state, 'end of the stream or a document separator is expected');
+  } else {
+    return;
+  }
+}
+
+
+function loadDocuments(input, options) {
+  input = String(input);
+  options = options || {};
+
+  if (input.length !== 0) {
+
+    // Add tailing `\n` if not exists
+    if (input.charCodeAt(input.length - 1) !== 0x0A/* LF */ &&
+        input.charCodeAt(input.length - 1) !== 0x0D/* CR */) {
+      input += '\n';
+    }
+
+    // Strip BOM
+    if (input.charCodeAt(0) === 0xFEFF) {
+      input = input.slice(1);
+    }
+  }
+
+  var state = new State(input, options);
+
+  // Use 0 as string terminator. That significantly simplifies bounds check.
+  state.input += '\0';
+
+  while (state.input.charCodeAt(state.position) === 0x20/* Space */) {
+    state.lineIndent += 1;
+    state.position += 1;
+  }
+
+  while (state.position < (state.length - 1)) {
+    readDocument(state);
+  }
+
+  return state.documents;
+}
+
+
+function loadAll(input, iterator, options) {
+  var documents = loadDocuments(input, options), index, length;
+
+  for (index = 0, length = documents.length; index < length; index += 1) {
+    iterator(documents[index]);
+  }
+}
+
+
+function load(input, options) {
+  var documents = loadDocuments(input, options);
+
+  if (documents.length === 0) {
+    /*eslint-disable no-undefined*/
+    return undefined;
+  } else if (documents.length === 1) {
+    return documents[0];
+  }
+  throw new YAMLException('expected a single document in the stream, but found more');
+}
+
+
+function safeLoadAll(input, output, options) {
+  loadAll(input, output, common.extend({ schema: DEFAULT_SAFE_SCHEMA }, options));
+}
+
+
+function safeLoad(input, options) {
+  return load(input, common.extend({ schema: DEFAULT_SAFE_SCHEMA }, options));
+}
+
+
+module.exports.loadAll     = loadAll;
+module.exports.load        = load;
+module.exports.safeLoadAll = safeLoadAll;
+module.exports.safeLoad    = safeLoad;
+
+},{"./common":2,"./exception":4,"./mark":6,"./schema/default_full":9,"./schema/default_safe":10}],6:[function(require,module,exports){
+'use strict';
+
+
+var common = require('./common');
+
+
+function Mark(name, buffer, position, line, column) {
+  this.name     = name;
+  this.buffer   = buffer;
+  this.position = position;
+  this.line     = line;
+  this.column   = column;
+}
+
+
+Mark.prototype.getSnippet = function getSnippet(indent, maxLength) {
+  var head, start, tail, end, snippet;
+
+  if (!this.buffer) return null;
+
+  indent = indent || 4;
+  maxLength = maxLength || 75;
+
+  head = '';
+  start = this.position;
+
+  while (start > 0 && '\x00\r\n\x85\u2028\u2029'.indexOf(this.buffer.charAt(start - 1)) === -1) {
+    start -= 1;
+    if (this.position - start > (maxLength / 2 - 1)) {
+      head = ' ... ';
+      start += 5;
+      break;
+    }
+  }
+
+  tail = '';
+  end = this.position;
+
+  while (end < this.buffer.length && '\x00\r\n\x85\u2028\u2029'.indexOf(this.buffer.charAt(end)) === -1) {
+    end += 1;
+    if (end - this.position > (maxLength / 2 - 1)) {
+      tail = ' ... ';
+      end -= 5;
+      break;
+    }
+  }
+
+  snippet = this.buffer.slice(start, end);
+
+  return common.repeat(' ', indent) + head + snippet + tail + '\n' +
+         common.repeat(' ', indent + this.position - start + head.length) + '^';
+};
+
+
+Mark.prototype.toString = function toString(compact) {
+  var snippet, where = '';
+
+  if (this.name) {
+    where += 'in "' + this.name + '" ';
+  }
+
+  where += 'at line ' + (this.line + 1) + ', column ' + (this.column + 1);
+
+  if (!compact) {
+    snippet = this.getSnippet();
+
+    if (snippet) {
+      where += ':\n' + snippet;
+    }
+  }
+
+  return where;
+};
+
+
+module.exports = Mark;
+
+},{"./common":2}],7:[function(require,module,exports){
+'use strict';
+
+/*eslint-disable max-len*/
+
+var common        = require('./common');
+var YAMLException = require('./exception');
+var Type          = require('./type');
+
+
+function compileList(schema, name, result) {
+  var exclude = [];
+
+  schema.include.forEach(function (includedSchema) {
+    result = compileList(includedSchema, name, result);
+  });
+
+  schema[name].forEach(function (currentType) {
+    result.forEach(function (previousType, previousIndex) {
+      if (previousType.tag === currentType.tag) {
+        exclude.push(previousIndex);
+      }
+    });
+
+    result.push(currentType);
+  });
+
+  return result.filter(function (type, index) {
+    return exclude.indexOf(index) === -1;
+  });
+}
+
+
+function compileMap(/* lists... */) {
+  var result = {}, index, length;
+
+  function collectType(type) {
+    result[type.tag] = type;
+  }
+
+  for (index = 0, length = arguments.length; index < length; index += 1) {
+    arguments[index].forEach(collectType);
+  }
+
+  return result;
+}
+
+
+function Schema(definition) {
+  this.include  = definition.include  || [];
+  this.implicit = definition.implicit || [];
+  this.explicit = definition.explicit || [];
+
+  this.implicit.forEach(function (type) {
+    if (type.loadKind && type.loadKind !== 'scalar') {
+      throw new YAMLException('There is a non-scalar type in the implicit list of a schema. Implicit resolving of such types is not supported.');
+    }
+  });
+
+  this.compiledImplicit = compileList(this, 'implicit', []);
+  this.compiledExplicit = compileList(this, 'explicit', []);
+  this.compiledTypeMap  = compileMap(this.compiledImplicit, this.compiledExplicit);
+}
+
+
+Schema.DEFAULT = null;
+
+
+Schema.create = function createSchema() {
+  var schemas, types;
+
+  switch (arguments.length) {
+    case 1:
+      schemas = Schema.DEFAULT;
+      types = arguments[0];
+      break;
+
+    case 2:
+      schemas = arguments[0];
+      types = arguments[1];
+      break;
+
+    default:
+      throw new YAMLException('Wrong number of arguments for Schema.create function');
+  }
+
+  schemas = common.toArray(schemas);
+  types = common.toArray(types);
+
+  if (!schemas.every(function (schema) { return schema instanceof Schema; })) {
+    throw new YAMLException('Specified list of super schemas (or a single Schema object) contains a non-Schema object.');
+  }
+
+  if (!types.every(function (type) { return type instanceof Type; })) {
+    throw new YAMLException('Specified list of YAML types (or a single Type object) contains a non-Type object.');
+  }
+
+  return new Schema({
+    include: schemas,
+    explicit: types
+  });
+};
+
+
+module.exports = Schema;
+
+},{"./common":2,"./exception":4,"./type":13}],8:[function(require,module,exports){
+// Standard YAML's Core schema.
+// http://www.yaml.org/spec/1.2/spec.html#id2804923
+//
+// NOTE: JS-YAML does not support schema-specific tag resolution restrictions.
+// So, Core schema has no distinctions from JSON schema is JS-YAML.
+
+
+'use strict';
+
+
+var Schema = require('../schema');
+
+
+module.exports = new Schema({
+  include: [
+    require('./json')
+  ]
+});
+
+},{"../schema":7,"./json":12}],9:[function(require,module,exports){
+// JS-YAML's default schema for `load` function.
+// It is not described in the YAML specification.
+//
+// This schema is based on JS-YAML's default safe schema and includes
+// JavaScript-specific types: !!js/undefined, !!js/regexp and !!js/function.
+//
+// Also this schema is used as default base schema at `Schema.create` function.
+
+
+'use strict';
+
+
+var Schema = require('../schema');
+
+
+module.exports = Schema.DEFAULT = new Schema({
+  include: [
+    require('./default_safe')
+  ],
+  explicit: [
+    require('../type/js/undefined'),
+    require('../type/js/regexp'),
+    require('../type/js/function')
+  ]
+});
+
+},{"../schema":7,"../type/js/function":18,"../type/js/regexp":19,"../type/js/undefined":20,"./default_safe":10}],10:[function(require,module,exports){
+// JS-YAML's default schema for `safeLoad` function.
+// It is not described in the YAML specification.
+//
+// This schema is based on standard YAML's Core schema and includes most of
+// extra types described at YAML tag repository. (http://yaml.org/type/)
+
+
+'use strict';
+
+
+var Schema = require('../schema');
+
+
+module.exports = new Schema({
+  include: [
+    require('./core')
+  ],
+  implicit: [
+    require('../type/timestamp'),
+    require('../type/merge')
+  ],
+  explicit: [
+    require('../type/binary'),
+    require('../type/omap'),
+    require('../type/pairs'),
+    require('../type/set')
+  ]
+});
+
+},{"../schema":7,"../type/binary":14,"../type/merge":22,"../type/omap":24,"../type/pairs":25,"../type/set":27,"../type/timestamp":29,"./core":8}],11:[function(require,module,exports){
+// Standard YAML's Failsafe schema.
+// http://www.yaml.org/spec/1.2/spec.html#id2802346
+
+
+'use strict';
+
+
+var Schema = require('../schema');
+
+
+module.exports = new Schema({
+  explicit: [
+    require('../type/str'),
+    require('../type/seq'),
+    require('../type/map')
+  ]
+});
+
+},{"../schema":7,"../type/map":21,"../type/seq":26,"../type/str":28}],12:[function(require,module,exports){
+// Standard YAML's JSON schema.
+// http://www.yaml.org/spec/1.2/spec.html#id2803231
+//
+// NOTE: JS-YAML does not support schema-specific tag resolution restrictions.
+// So, this schema is not such strict as defined in the YAML specification.
+// It allows numbers in binary notaion, use `Null` and `NULL` as `null`, etc.
+
+
+'use strict';
+
+
+var Schema = require('../schema');
+
+
+module.exports = new Schema({
+  include: [
+    require('./failsafe')
+  ],
+  implicit: [
+    require('../type/null'),
+    require('../type/bool'),
+    require('../type/int'),
+    require('../type/float')
+  ]
+});
+
+},{"../schema":7,"../type/bool":15,"../type/float":16,"../type/int":17,"../type/null":23,"./failsafe":11}],13:[function(require,module,exports){
+'use strict';
+
+var YAMLException = require('./exception');
+
+var TYPE_CONSTRUCTOR_OPTIONS = [
+  'kind',
+  'resolve',
+  'construct',
+  'instanceOf',
+  'predicate',
+  'represent',
+  'defaultStyle',
+  'styleAliases'
+];
+
+var YAML_NODE_KINDS = [
+  'scalar',
+  'sequence',
+  'mapping'
+];
+
+function compileStyleAliases(map) {
+  var result = {};
+
+  if (map !== null) {
+    Object.keys(map).forEach(function (style) {
+      map[style].forEach(function (alias) {
+        result[String(alias)] = style;
+      });
+    });
+  }
+
+  return result;
+}
+
+function Type(tag, options) {
+  options = options || {};
+
+  Object.keys(options).forEach(function (name) {
+    if (TYPE_CONSTRUCTOR_OPTIONS.indexOf(name) === -1) {
+      throw new YAMLException('Unknown option "' + name + '" is met in definition of "' + tag + '" YAML type.');
+    }
+  });
+
+  // TODO: Add tag format check.
+  this.tag          = tag;
+  this.kind         = options['kind']         || null;
+  this.resolve      = options['resolve']      || function () { return true; };
+  this.construct    = options['construct']    || function (data) { return data; };
+  this.instanceOf   = options['instanceOf']   || null;
+  this.predicate    = options['predicate']    || null;
+  this.represent    = options['represent']    || null;
+  this.defaultStyle = options['defaultStyle'] || null;
+  this.styleAliases = compileStyleAliases(options['styleAliases'] || null);
+
+  if (YAML_NODE_KINDS.indexOf(this.kind) === -1) {
+    throw new YAMLException('Unknown kind "' + this.kind + '" is specified for "' + tag + '" YAML type.');
+  }
+}
+
+module.exports = Type;
+
+},{"./exception":4}],14:[function(require,module,exports){
+'use strict';
+
+/*eslint-disable no-bitwise*/
+
+var NodeBuffer;
+
+try {
+  // A trick for browserified version, to not include `Buffer` shim
+  var _require = require;
+  NodeBuffer = _require('buffer').Buffer;
+} catch (__) {}
+
+var Type       = require('../type');
+
+
+// [ 64, 65, 66 ] -> [ padding, CR, LF ]
+var BASE64_MAP = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=\n\r';
+
+
+function resolveYamlBinary(data) {
+  if (data === null) return false;
+
+  var code, idx, bitlen = 0, max = data.length, map = BASE64_MAP;
+
+  // Convert one by one.
+  for (idx = 0; idx < max; idx++) {
+    code = map.indexOf(data.charAt(idx));
+
+    // Skip CR/LF
+    if (code > 64) continue;
+
+    // Fail on illegal characters
+    if (code < 0) return false;
+
+    bitlen += 6;
+  }
+
+  // If there are any bits left, source was corrupted
+  return (bitlen % 8) === 0;
+}
+
+function constructYamlBinary(data) {
+  var idx, tailbits,
+      input = data.replace(/[\r\n=]/g, ''), // remove CR/LF & padding to simplify scan
+      max = input.length,
+      map = BASE64_MAP,
+      bits = 0,
+      result = [];
+
+  // Collect by 6*4 bits (3 bytes)
+
+  for (idx = 0; idx < max; idx++) {
+    if ((idx % 4 === 0) && idx) {
+      result.push((bits >> 16) & 0xFF);
+      result.push((bits >> 8) & 0xFF);
+      result.push(bits & 0xFF);
+    }
+
+    bits = (bits << 6) | map.indexOf(input.charAt(idx));
+  }
+
+  // Dump tail
+
+  tailbits = (max % 4) * 6;
+
+  if (tailbits === 0) {
+    result.push((bits >> 16) & 0xFF);
+    result.push((bits >> 8) & 0xFF);
+    result.push(bits & 0xFF);
+  } else if (tailbits === 18) {
+    result.push((bits >> 10) & 0xFF);
+    result.push((bits >> 2) & 0xFF);
+  } else if (tailbits === 12) {
+    result.push((bits >> 4) & 0xFF);
+  }
+
+  // Wrap into Buffer for NodeJS and leave Array for browser
+  if (NodeBuffer) return new NodeBuffer(result);
+
+  return result;
+}
+
+function representYamlBinary(object /*, style*/) {
+  var result = '', bits = 0, idx, tail,
+      max = object.length,
+      map = BASE64_MAP;
+
+  // Convert every three bytes to 4 ASCII characters.
+
+  for (idx = 0; idx < max; idx++) {
+    if ((idx % 3 === 0) && idx) {
+      result += map[(bits >> 18) & 0x3F];
+      result += map[(bits >> 12) & 0x3F];
+      result += map[(bits >> 6) & 0x3F];
+      result += map[bits & 0x3F];
+    }
+
+    bits = (bits << 8) + object[idx];
+  }
+
+  // Dump tail
+
+  tail = max % 3;
+
+  if (tail === 0) {
+    result += map[(bits >> 18) & 0x3F];
+    result += map[(bits >> 12) & 0x3F];
+    result += map[(bits >> 6) & 0x3F];
+    result += map[bits & 0x3F];
+  } else if (tail === 2) {
+    result += map[(bits >> 10) & 0x3F];
+    result += map[(bits >> 4) & 0x3F];
+    result += map[(bits << 2) & 0x3F];
+    result += map[64];
+  } else if (tail === 1) {
+    result += map[(bits >> 2) & 0x3F];
+    result += map[(bits << 4) & 0x3F];
+    result += map[64];
+    result += map[64];
+  }
+
+  return result;
+}
+
+function isBinary(object) {
+  return NodeBuffer && NodeBuffer.isBuffer(object);
+}
+
+module.exports = new Type('tag:yaml.org,2002:binary', {
+  kind: 'scalar',
+  resolve: resolveYamlBinary,
+  construct: constructYamlBinary,
+  predicate: isBinary,
+  represent: representYamlBinary
+});
+
+},{"../type":13}],15:[function(require,module,exports){
+'use strict';
+
+var Type = require('../type');
+
+function resolveYamlBoolean(data) {
+  if (data === null) return false;
+
+  var max = data.length;
+
+  return (max === 4 && (data === 'true' || data === 'True' || data === 'TRUE')) ||
+         (max === 5 && (data === 'false' || data === 'False' || data === 'FALSE'));
+}
+
+function constructYamlBoolean(data) {
+  return data === 'true' ||
+         data === 'True' ||
+         data === 'TRUE';
+}
+
+function isBoolean(object) {
+  return Object.prototype.toString.call(object) === '[object Boolean]';
+}
+
+module.exports = new Type('tag:yaml.org,2002:bool', {
+  kind: 'scalar',
+  resolve: resolveYamlBoolean,
+  construct: constructYamlBoolean,
+  predicate: isBoolean,
+  represent: {
+    lowercase: function (object) { return object ? 'true' : 'false'; },
+    uppercase: function (object) { return object ? 'TRUE' : 'FALSE'; },
+    camelcase: function (object) { return object ? 'True' : 'False'; }
+  },
+  defaultStyle: 'lowercase'
+});
+
+},{"../type":13}],16:[function(require,module,exports){
+'use strict';
+
+var common = require('../common');
+var Type   = require('../type');
+
+var YAML_FLOAT_PATTERN = new RegExp(
+  '^(?:[-+]?(?:[0-9][0-9_]*)\\.[0-9_]*(?:[eE][-+][0-9]+)?' +
+  '|\\.[0-9_]+(?:[eE][-+][0-9]+)?' +
+  '|[-+]?[0-9][0-9_]*(?::[0-5]?[0-9])+\\.[0-9_]*' +
+  '|[-+]?\\.(?:inf|Inf|INF)' +
+  '|\\.(?:nan|NaN|NAN))$');
+
+function resolveYamlFloat(data) {
+  if (data === null) return false;
+
+  if (!YAML_FLOAT_PATTERN.test(data)) return false;
+
+  return true;
+}
+
+function constructYamlFloat(data) {
+  var value, sign, base, digits;
+
+  value  = data.replace(/_/g, '').toLowerCase();
+  sign   = value[0] === '-' ? -1 : 1;
+  digits = [];
+
+  if ('+-'.indexOf(value[0]) >= 0) {
+    value = value.slice(1);
+  }
+
+  if (value === '.inf') {
+    return (sign === 1) ? Number.POSITIVE_INFINITY : Number.NEGATIVE_INFINITY;
+
+  } else if (value === '.nan') {
+    return NaN;
+
+  } else if (value.indexOf(':') >= 0) {
+    value.split(':').forEach(function (v) {
+      digits.unshift(parseFloat(v, 10));
+    });
+
+    value = 0.0;
+    base = 1;
+
+    digits.forEach(function (d) {
+      value += d * base;
+      base *= 60;
+    });
+
+    return sign * value;
+
+  }
+  return sign * parseFloat(value, 10);
+}
+
+
+var SCIENTIFIC_WITHOUT_DOT = /^[-+]?[0-9]+e/;
+
+function representYamlFloat(object, style) {
+  var res;
+
+  if (isNaN(object)) {
+    switch (style) {
+      case 'lowercase': return '.nan';
+      case 'uppercase': return '.NAN';
+      case 'camelcase': return '.NaN';
+    }
+  } else if (Number.POSITIVE_INFINITY === object) {
+    switch (style) {
+      case 'lowercase': return '.inf';
+      case 'uppercase': return '.INF';
+      case 'camelcase': return '.Inf';
+    }
+  } else if (Number.NEGATIVE_INFINITY === object) {
+    switch (style) {
+      case 'lowercase': return '-.inf';
+      case 'uppercase': return '-.INF';
+      case 'camelcase': return '-.Inf';
+    }
+  } else if (common.isNegativeZero(object)) {
+    return '-0.0';
+  }
+
+  res = object.toString(10);
+
+  // JS stringifier can build scientific format without dots: 5e-100,
+  // while YAML requres dot: 5.e-100. Fix it with simple hack
+
+  return SCIENTIFIC_WITHOUT_DOT.test(res) ? res.replace('e', '.e') : res;
+}
+
+function isFloat(object) {
+  return (Object.prototype.toString.call(object) === '[object Number]') &&
+         (object % 1 !== 0 || common.isNegativeZero(object));
+}
+
+module.exports = new Type('tag:yaml.org,2002:float', {
+  kind: 'scalar',
+  resolve: resolveYamlFloat,
+  construct: constructYamlFloat,
+  predicate: isFloat,
+  represent: representYamlFloat,
+  defaultStyle: 'lowercase'
+});
+
+},{"../common":2,"../type":13}],17:[function(require,module,exports){
+'use strict';
+
+var common = require('../common');
+var Type   = require('../type');
+
+function isHexCode(c) {
+  return ((0x30/* 0 */ <= c) && (c <= 0x39/* 9 */)) ||
+         ((0x41/* A */ <= c) && (c <= 0x46/* F */)) ||
+         ((0x61/* a */ <= c) && (c <= 0x66/* f */));
+}
+
+function isOctCode(c) {
+  return ((0x30/* 0 */ <= c) && (c <= 0x37/* 7 */));
+}
+
+function isDecCode(c) {
+  return ((0x30/* 0 */ <= c) && (c <= 0x39/* 9 */));
+}
+
+function resolveYamlInteger(data) {
+  if (data === null) return false;
+
+  var max = data.length,
+      index = 0,
+      hasDigits = false,
+      ch;
+
+  if (!max) return false;
+
+  ch = data[index];
+
+  // sign
+  if (ch === '-' || ch === '+') {
+    ch = data[++index];
+  }
+
+  if (ch === '0') {
+    // 0
+    if (index + 1 === max) return true;
+    ch = data[++index];
+
+    // base 2, base 8, base 16
+
+    if (ch === 'b') {
+      // base 2
+      index++;
+
+      for (; index < max; index++) {
+        ch = data[index];
+        if (ch === '_') continue;
+        if (ch !== '0' && ch !== '1') return false;
+        hasDigits = true;
+      }
+      return hasDigits;
+    }
+
+
+    if (ch === 'x') {
+      // base 16
+      index++;
+
+      for (; index < max; index++) {
+        ch = data[index];
+        if (ch === '_') continue;
+        if (!isHexCode(data.charCodeAt(index))) return false;
+        hasDigits = true;
+      }
+      return hasDigits;
+    }
+
+    // base 8
+    for (; index < max; index++) {
+      ch = data[index];
+      if (ch === '_') continue;
+      if (!isOctCode(data.charCodeAt(index))) return false;
+      hasDigits = true;
+    }
+    return hasDigits;
+  }
+
+  // base 10 (except 0) or base 60
+
+  for (; index < max; index++) {
+    ch = data[index];
+    if (ch === '_') continue;
+    if (ch === ':') break;
+    if (!isDecCode(data.charCodeAt(index))) {
+      return false;
+    }
+    hasDigits = true;
+  }
+
+  if (!hasDigits) return false;
+
+  // if !base60 - done;
+  if (ch !== ':') return true;
+
+  // base60 almost not used, no needs to optimize
+  return /^(:[0-5]?[0-9])+$/.test(data.slice(index));
+}
+
+function constructYamlInteger(data) {
+  var value = data, sign = 1, ch, base, digits = [];
+
+  if (value.indexOf('_') !== -1) {
+    value = value.replace(/_/g, '');
+  }
+
+  ch = value[0];
+
+  if (ch === '-' || ch === '+') {
+    if (ch === '-') sign = -1;
+    value = value.slice(1);
+    ch = value[0];
+  }
+
+  if (value === '0') return 0;
+
+  if (ch === '0') {
+    if (value[1] === 'b') return sign * parseInt(value.slice(2), 2);
+    if (value[1] === 'x') return sign * parseInt(value, 16);
+    return sign * parseInt(value, 8);
+  }
+
+  if (value.indexOf(':') !== -1) {
+    value.split(':').forEach(function (v) {
+      digits.unshift(parseInt(v, 10));
+    });
+
+    value = 0;
+    base = 1;
+
+    digits.forEach(function (d) {
+      value += (d * base);
+      base *= 60;
+    });
+
+    return sign * value;
+
+  }
+
+  return sign * parseInt(value, 10);
+}
+
+function isInteger(object) {
+  return (Object.prototype.toString.call(object)) === '[object Number]' &&
+         (object % 1 === 0 && !common.isNegativeZero(object));
+}
+
+module.exports = new Type('tag:yaml.org,2002:int', {
+  kind: 'scalar',
+  resolve: resolveYamlInteger,
+  construct: constructYamlInteger,
+  predicate: isInteger,
+  represent: {
+    binary:      function (object) { return '0b' + object.toString(2); },
+    octal:       function (object) { return '0'  + object.toString(8); },
+    decimal:     function (object) { return        object.toString(10); },
+    hexadecimal: function (object) { return '0x' + object.toString(16).toUpperCase(); }
+  },
+  defaultStyle: 'decimal',
+  styleAliases: {
+    binary:      [ 2,  'bin' ],
+    octal:       [ 8,  'oct' ],
+    decimal:     [ 10, 'dec' ],
+    hexadecimal: [ 16, 'hex' ]
+  }
+});
+
+},{"../common":2,"../type":13}],18:[function(require,module,exports){
+'use strict';
+
+var esprima;
+
+// Browserified version does not have esprima
+//
+// 1. For node.js just require module as deps
+// 2. For browser try to require mudule via external AMD system.
+//    If not found - try to fallback to window.esprima. If not
+//    found too - then fail to parse.
+//
+try {
+  // workaround to exclude package from browserify list.
+  var _require = require;
+  esprima = _require('esprima');
+} catch (_) {
+  /*global window */
+  if (typeof window !== 'undefined') esprima = window.esprima;
+}
+
+var Type = require('../../type');
+
+function resolveJavascriptFunction(data) {
+  if (data === null) return false;
+
+  try {
+    var source = '(' + data + ')',
+        ast    = esprima.parse(source, { range: true });
+
+    if (ast.type                    !== 'Program'             ||
+        ast.body.length             !== 1                     ||
+        ast.body[0].type            !== 'ExpressionStatement' ||
+        ast.body[0].expression.type !== 'FunctionExpression') {
+      return false;
+    }
+
+    return true;
+  } catch (err) {
+    return false;
+  }
+}
+
+function constructJavascriptFunction(data) {
+  /*jslint evil:true*/
+
+  var source = '(' + data + ')',
+      ast    = esprima.parse(source, { range: true }),
+      params = [],
+      body;
+
+  if (ast.type                    !== 'Program'             ||
+      ast.body.length             !== 1                     ||
+      ast.body[0].type            !== 'ExpressionStatement' ||
+      ast.body[0].expression.type !== 'FunctionExpression') {
+    throw new Error('Failed to resolve function');
+  }
+
+  ast.body[0].expression.params.forEach(function (param) {
+    params.push(param.name);
+  });
+
+  body = ast.body[0].expression.body.range;
+
+  // Esprima's ranges include the first '{' and the last '}' characters on
+  // function expressions. So cut them out.
+  /*eslint-disable no-new-func*/
+  return new Function(params, source.slice(body[0] + 1, body[1] - 1));
+}
+
+function representJavascriptFunction(object /*, style*/) {
+  return object.toString();
+}
+
+function isFunction(object) {
+  return Object.prototype.toString.call(object) === '[object Function]';
+}
+
+module.exports = new Type('tag:yaml.org,2002:js/function', {
+  kind: 'scalar',
+  resolve: resolveJavascriptFunction,
+  construct: constructJavascriptFunction,
+  predicate: isFunction,
+  represent: representJavascriptFunction
+});
+
+},{"../../type":13}],19:[function(require,module,exports){
+'use strict';
+
+var Type = require('../../type');
+
+function resolveJavascriptRegExp(data) {
+  if (data === null) return false;
+  if (data.length === 0) return false;
+
+  var regexp = data,
+      tail   = /\/([gim]*)$/.exec(data),
+      modifiers = '';
+
+  // if regexp starts with '/' it can have modifiers and must be properly closed
+  // `/foo/gim` - modifiers tail can be maximum 3 chars
+  if (regexp[0] === '/') {
+    if (tail) modifiers = tail[1];
+
+    if (modifiers.length > 3) return false;
+    // if expression starts with /, is should be properly terminated
+    if (regexp[regexp.length - modifiers.length - 1] !== '/') return false;
+  }
+
+  return true;
+}
+
+function constructJavascriptRegExp(data) {
+  var regexp = data,
+      tail   = /\/([gim]*)$/.exec(data),
+      modifiers = '';
+
+  // `/foo/gim` - tail can be maximum 4 chars
+  if (regexp[0] === '/') {
+    if (tail) modifiers = tail[1];
+    regexp = regexp.slice(1, regexp.length - modifiers.length - 1);
+  }
+
+  return new RegExp(regexp, modifiers);
+}
+
+function representJavascriptRegExp(object /*, style*/) {
+  var result = '/' + object.source + '/';
+
+  if (object.global) result += 'g';
+  if (object.multiline) result += 'm';
+  if (object.ignoreCase) result += 'i';
+
+  return result;
+}
+
+function isRegExp(object) {
+  return Object.prototype.toString.call(object) === '[object RegExp]';
+}
+
+module.exports = new Type('tag:yaml.org,2002:js/regexp', {
+  kind: 'scalar',
+  resolve: resolveJavascriptRegExp,
+  construct: constructJavascriptRegExp,
+  predicate: isRegExp,
+  represent: representJavascriptRegExp
+});
+
+},{"../../type":13}],20:[function(require,module,exports){
+'use strict';
+
+var Type = require('../../type');
+
+function resolveJavascriptUndefined() {
+  return true;
+}
+
+function constructJavascriptUndefined() {
+  /*eslint-disable no-undefined*/
+  return undefined;
+}
+
+function representJavascriptUndefined() {
+  return '';
+}
+
+function isUndefined(object) {
+  return typeof object === 'undefined';
+}
+
+module.exports = new Type('tag:yaml.org,2002:js/undefined', {
+  kind: 'scalar',
+  resolve: resolveJavascriptUndefined,
+  construct: constructJavascriptUndefined,
+  predicate: isUndefined,
+  represent: representJavascriptUndefined
+});
+
+},{"../../type":13}],21:[function(require,module,exports){
+'use strict';
+
+var Type = require('../type');
+
+module.exports = new Type('tag:yaml.org,2002:map', {
+  kind: 'mapping',
+  construct: function (data) { return data !== null ? data : {}; }
+});
+
+},{"../type":13}],22:[function(require,module,exports){
+'use strict';
+
+var Type = require('../type');
+
+function resolveYamlMerge(data) {
+  return data === '<<' || data === null;
+}
+
+module.exports = new Type('tag:yaml.org,2002:merge', {
+  kind: 'scalar',
+  resolve: resolveYamlMerge
+});
+
+},{"../type":13}],23:[function(require,module,exports){
+'use strict';
+
+var Type = require('../type');
+
+function resolveYamlNull(data) {
+  if (data === null) return true;
+
+  var max = data.length;
+
+  return (max === 1 && data === '~') ||
+         (max === 4 && (data === 'null' || data === 'Null' || data === 'NULL'));
+}
+
+function constructYamlNull() {
+  return null;
+}
+
+function isNull(object) {
+  return object === null;
+}
+
+module.exports = new Type('tag:yaml.org,2002:null', {
+  kind: 'scalar',
+  resolve: resolveYamlNull,
+  construct: constructYamlNull,
+  predicate: isNull,
+  represent: {
+    canonical: function () { return '~';    },
+    lowercase: function () { return 'null'; },
+    uppercase: function () { return 'NULL'; },
+    camelcase: function () { return 'Null'; }
+  },
+  defaultStyle: 'lowercase'
+});
+
+},{"../type":13}],24:[function(require,module,exports){
+'use strict';
+
+var Type = require('../type');
+
+var _hasOwnProperty = Object.prototype.hasOwnProperty;
+var _toString       = Object.prototype.toString;
+
+function resolveYamlOmap(data) {
+  if (data === null) return true;
+
+  var objectKeys = [], index, length, pair, pairKey, pairHasKey,
+      object = data;
+
+  for (index = 0, length = object.length; index < length; index += 1) {
+    pair = object[index];
+    pairHasKey = false;
+
+    if (_toString.call(pair) !== '[object Object]') return false;
+
+    for (pairKey in pair) {
+      if (_hasOwnProperty.call(pair, pairKey)) {
+        if (!pairHasKey) pairHasKey = true;
+        else return false;
+      }
+    }
+
+    if (!pairHasKey) return false;
+
+    if (objectKeys.indexOf(pairKey) === -1) objectKeys.push(pairKey);
+    else return false;
+  }
+
+  return true;
+}
+
+function constructYamlOmap(data) {
+  return data !== null ? data : [];
+}
+
+module.exports = new Type('tag:yaml.org,2002:omap', {
+  kind: 'sequence',
+  resolve: resolveYamlOmap,
+  construct: constructYamlOmap
+});
+
+},{"../type":13}],25:[function(require,module,exports){
+'use strict';
+
+var Type = require('../type');
+
+var _toString = Object.prototype.toString;
+
+function resolveYamlPairs(data) {
+  if (data === null) return true;
+
+  var index, length, pair, keys, result,
+      object = data;
+
+  result = new Array(object.length);
+
+  for (index = 0, length = object.length; index < length; index += 1) {
+    pair = object[index];
+
+    if (_toString.call(pair) !== '[object Object]') return false;
+
+    keys = Object.keys(pair);
+
+    if (keys.length !== 1) return false;
+
+    result[index] = [ keys[0], pair[keys[0]] ];
+  }
+
+  return true;
+}
+
+function constructYamlPairs(data) {
+  if (data === null) return [];
+
+  var index, length, pair, keys, result,
+      object = data;
+
+  result = new Array(object.length);
+
+  for (index = 0, length = object.length; index < length; index += 1) {
+    pair = object[index];
+
+    keys = Object.keys(pair);
+
+    result[index] = [ keys[0], pair[keys[0]] ];
+  }
+
+  return result;
+}
+
+module.exports = new Type('tag:yaml.org,2002:pairs', {
+  kind: 'sequence',
+  resolve: resolveYamlPairs,
+  construct: constructYamlPairs
+});
+
+},{"../type":13}],26:[function(require,module,exports){
+'use strict';
+
+var Type = require('../type');
+
+module.exports = new Type('tag:yaml.org,2002:seq', {
+  kind: 'sequence',
+  construct: function (data) { return data !== null ? data : []; }
+});
+
+},{"../type":13}],27:[function(require,module,exports){
+'use strict';
+
+var Type = require('../type');
+
+var _hasOwnProperty = Object.prototype.hasOwnProperty;
+
+function resolveYamlSet(data) {
+  if (data === null) return true;
+
+  var key, object = data;
+
+  for (key in object) {
+    if (_hasOwnProperty.call(object, key)) {
+      if (object[key] !== null) return false;
+    }
+  }
+
+  return true;
+}
+
+function constructYamlSet(data) {
+  return data !== null ? data : {};
+}
+
+module.exports = new Type('tag:yaml.org,2002:set', {
+  kind: 'mapping',
+  resolve: resolveYamlSet,
+  construct: constructYamlSet
+});
+
+},{"../type":13}],28:[function(require,module,exports){
+'use strict';
+
+var Type = require('../type');
+
+module.exports = new Type('tag:yaml.org,2002:str', {
+  kind: 'scalar',
+  construct: function (data) { return data !== null ? data : ''; }
+});
+
+},{"../type":13}],29:[function(require,module,exports){
+'use strict';
+
+var Type = require('../type');
+
+var YAML_DATE_REGEXP = new RegExp(
+  '^([0-9][0-9][0-9][0-9])'          + // [1] year
+  '-([0-9][0-9])'                    + // [2] month
+  '-([0-9][0-9])$');                   // [3] day
+
+var YAML_TIMESTAMP_REGEXP = new RegExp(
+  '^([0-9][0-9][0-9][0-9])'          + // [1] year
+  '-([0-9][0-9]?)'                   + // [2] month
+  '-([0-9][0-9]?)'                   + // [3] day
+  '(?:[Tt]|[ \\t]+)'                 + // ...
+  '([0-9][0-9]?)'                    + // [4] hour
+  ':([0-9][0-9])'                    + // [5] minute
+  ':([0-9][0-9])'                    + // [6] second
+  '(?:\\.([0-9]*))?'                 + // [7] fraction
+  '(?:[ \\t]*(Z|([-+])([0-9][0-9]?)' + // [8] tz [9] tz_sign [10] tz_hour
+  '(?::([0-9][0-9]))?))?$');           // [11] tz_minute
+
+function resolveYamlTimestamp(data) {
+  if (data === null) return false;
+  if (YAML_DATE_REGEXP.exec(data) !== null) return true;
+  if (YAML_TIMESTAMP_REGEXP.exec(data) !== null) return true;
+  return false;
+}
+
+function constructYamlTimestamp(data) {
+  var match, year, month, day, hour, minute, second, fraction = 0,
+      delta = null, tz_hour, tz_minute, date;
+
+  match = YAML_DATE_REGEXP.exec(data);
+  if (match === null) match = YAML_TIMESTAMP_REGEXP.exec(data);
+
+  if (match === null) throw new Error('Date resolve error');
+
+  // match: [1] year [2] month [3] day
+
+  year = +(match[1]);
+  month = +(match[2]) - 1; // JS month starts with 0
+  day = +(match[3]);
+
+  if (!match[4]) { // no hour
+    return new Date(Date.UTC(year, month, day));
+  }
+
+  // match: [4] hour [5] minute [6] second [7] fraction
+
+  hour = +(match[4]);
+  minute = +(match[5]);
+  second = +(match[6]);
+
+  if (match[7]) {
+    fraction = match[7].slice(0, 3);
+    while (fraction.length < 3) { // milli-seconds
+      fraction += '0';
+    }
+    fraction = +fraction;
+  }
+
+  // match: [8] tz [9] tz_sign [10] tz_hour [11] tz_minute
+
+  if (match[9]) {
+    tz_hour = +(match[10]);
+    tz_minute = +(match[11] || 0);
+    delta = (tz_hour * 60 + tz_minute) * 60000; // delta in mili-seconds
+    if (match[9] === '-') delta = -delta;
+  }
+
+  date = new Date(Date.UTC(year, month, day, hour, minute, second, fraction));
+
+  if (delta) date.setTime(date.getTime() - delta);
+
+  return date;
+}
+
+function representYamlTimestamp(object /*, style*/) {
+  return object.toISOString();
+}
+
+module.exports = new Type('tag:yaml.org,2002:timestamp', {
+  kind: 'scalar',
+  resolve: resolveYamlTimestamp,
+  construct: constructYamlTimestamp,
+  instanceOf: Date,
+  represent: representYamlTimestamp
+});
+
+},{"../type":13}],"/":[function(require,module,exports){
+'use strict';
+
+
+var yaml = require('./lib/js-yaml.js');
+
+
+module.exports = yaml;
+
+},{"./lib/js-yaml.js":1}]},{},[])("/")
+});
\ No newline at end of file
diff --git a/tools/doc/node_modules/js-yaml/dist/js-yaml.min.js b/tools/doc/node_modules/js-yaml/dist/js-yaml.min.js
new file mode 100644
index 00000000000000..3f2f2a1d453ab7
--- /dev/null
+++ b/tools/doc/node_modules/js-yaml/dist/js-yaml.min.js
@@ -0,0 +1,3 @@
+/* js-yaml 3.6.1 https://github.com/nodeca/js-yaml */
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a("tag:yaml.org,2002:null",{kind:"scalar",resolve:i,construct:r,predicate:o,represent:{canonical:function(){return"~"},lowercase:function(){return"null"},uppercase:function(){return"NULL"},camelcase:function(){return"Null"}},defaultStyle:"lowercase"})},{"../type":13}],24:[function(e,t,n){"use strict";function i(e){if(null===e)return!0;var t,n,i,r,o,c=[],u=e;for(t=0,n=u.length;n>t;t+=1){if(i=u[t],o=!1,"[object Object]"!==s.call(i))return!1;for(r in i)if(a.call(i,r)){if(o)return!1;o=!0}if(!o)return!1;if(-1!==c.indexOf(r))return!1;c.push(r)}return!0}function r(e){return null!==e?e:[]}var o=e("../type"),a=Object.prototype.hasOwnProperty,s=Object.prototype.toString;t.exports=new o("tag:yaml.org,2002:omap",{kind:"sequence",resolve:i,construct:r})},{"../type":13}],25:[function(e,t,n){"use strict";function i(e){if(null===e)return!0;var t,n,i,r,o,s=e;for(o=new Array(s.length),t=0,n=s.length;n>t;t+=1){if(i=s[t],"[object Object]"!==a.call(i))return!1;if(r=Object.keys(i),1!==r.length)return!1;o[t]=[r[0],i[r[0]]]}return!0}function r(e){if(null===e)return[];var t,n,i,r,o,a=e;for(o=new Array(a.length),t=0,n=a.length;n>t;t+=1)i=a[t],r=Object.keys(i),o[t]=[r[0],i[r[0]]];return o}var o=e("../type"),a=Object.prototype.toString;t.exports=new o("tag:yaml.org,2002:pairs",{kind:"sequence",resolve:i,construct:r})},{"../type":13}],26:[function(e,t,n){"use strict";var i=e("../type");t.exports=new i("tag:yaml.org,2002:seq",{kind:"sequence",construct:function(e){return null!==e?e:[]}})},{"../type":13}],27:[function(e,t,n){"use strict";function i(e){if(null===e)return!0;var t,n=e;for(t in n)if(a.call(n,t)&&null!==n[t])return!1;return!0}function r(e){return null!==e?e:{}}var o=e("../type"),a=Object.prototype.hasOwnProperty;t.exports=new o("tag:yaml.org,2002:set",{kind:"mapping",resolve:i,construct:r})},{"../type":13}],28:[function(e,t,n){"use strict";var i=e("../type");t.exports=new i("tag:yaml.org,2002:str",{kind:"scalar",construct:function(e){return null!==e?e:""}})},{"../type":13}],29:[function(e,t,n){"use strict";function i(e){return null===e?!1:null!==s.exec(e)?!0:null!==c.exec(e)}function r(e){var t,n,i,r,o,a,u,l,p,f,d=0,h=null;if(t=s.exec(e),null===t&&(t=c.exec(e)),null===t)throw new Error("Date resolve error");if(n=+t[1],i=+t[2]-1,r=+t[3],!t[4])return new Date(Date.UTC(n,i,r));if(o=+t[4],a=+t[5],u=+t[6],t[7]){for(d=t[7].slice(0,3);d.length<3;)d+="0";d=+d}return t[9]&&(l=+t[10],p=+(t[11]||0),h=6e4*(60*l+p),"-"===t[9]&&(h=-h)),f=new Date(Date.UTC(n,i,r,o,a,u,d)),h&&f.setTime(f.getTime()-h),f}function o(e){return e.toISOString()}var a=e("../type"),s=new RegExp("^([0-9][0-9][0-9][0-9])-([0-9][0-9])-([0-9][0-9])$"),c=new RegExp("^([0-9][0-9][0-9][0-9])-([0-9][0-9]?)-([0-9][0-9]?)(?:[Tt]|[ \\t]+)([0-9][0-9]?):([0-9][0-9]):([0-9][0-9])(?:\\.([0-9]*))?(?:[ \\t]*(Z|([-+])([0-9][0-9]?)(?::([0-9][0-9]))?))?$");t.exports=new a("tag:yaml.org,2002:timestamp",{kind:"scalar",resolve:i,construct:r,instanceOf:Date,represent:o})},{"../type":13}],"/":[function(e,t,n){"use strict";var i=e("./lib/js-yaml.js");t.exports=i},{"./lib/js-yaml.js":1}]},{},[])("/")});
diff --git a/tools/doc/node_modules/js-yaml/index.js b/tools/doc/node_modules/js-yaml/index.js
index 620bc293ffe032..13744352448b84 100644
--- a/tools/doc/node_modules/js-yaml/index.js
+++ b/tools/doc/node_modules/js-yaml/index.js
@@ -1,15 +1,7 @@
 'use strict';
 
-// Hack to load the js-yaml module from eslint.
-// No other reason than that it’s huge.
 
-const path = require('path');
+var yaml = require('./lib/js-yaml.js');
 
-const realJSYaml = path.resolve(
-  __dirname, '..', '..', '..', // tools/
-  'eslint',
-  'node_modules',
-  'js-yaml'
-);
 
-module.exports = require(realJSYaml);
+module.exports = yaml;
diff --git a/tools/doc/node_modules/js-yaml/lib/js-yaml.js b/tools/doc/node_modules/js-yaml/lib/js-yaml.js
new file mode 100644
index 00000000000000..f0e92818e90cee
--- /dev/null
+++ b/tools/doc/node_modules/js-yaml/lib/js-yaml.js
@@ -0,0 +1,39 @@
+'use strict';
+
+
+var loader = require('./js-yaml/loader');
+var dumper = require('./js-yaml/dumper');
+
+
+function deprecated(name) {
+  return function () {
+    throw new Error('Function ' + name + ' is deprecated and cannot be used.');
+  };
+}
+
+
+module.exports.Type                = require('./js-yaml/type');
+module.exports.Schema              = require('./js-yaml/schema');
+module.exports.FAILSAFE_SCHEMA     = require('./js-yaml/schema/failsafe');
+module.exports.JSON_SCHEMA         = require('./js-yaml/schema/json');
+module.exports.CORE_SCHEMA         = require('./js-yaml/schema/core');
+module.exports.DEFAULT_SAFE_SCHEMA = require('./js-yaml/schema/default_safe');
+module.exports.DEFAULT_FULL_SCHEMA = require('./js-yaml/schema/default_full');
+module.exports.load                = loader.load;
+module.exports.loadAll             = loader.loadAll;
+module.exports.safeLoad            = loader.safeLoad;
+module.exports.safeLoadAll         = loader.safeLoadAll;
+module.exports.dump                = dumper.dump;
+module.exports.safeDump            = dumper.safeDump;
+module.exports.YAMLException       = require('./js-yaml/exception');
+
+// Deprecated schema names from JS-YAML 2.0.x
+module.exports.MINIMAL_SCHEMA = require('./js-yaml/schema/failsafe');
+module.exports.SAFE_SCHEMA    = require('./js-yaml/schema/default_safe');
+module.exports.DEFAULT_SCHEMA = require('./js-yaml/schema/default_full');
+
+// Deprecated functions from JS-YAML 1.x.x
+module.exports.scan           = deprecated('scan');
+module.exports.parse          = deprecated('parse');
+module.exports.compose        = deprecated('compose');
+module.exports.addConstructor = deprecated('addConstructor');
diff --git a/tools/doc/node_modules/js-yaml/lib/js-yaml/common.js b/tools/doc/node_modules/js-yaml/lib/js-yaml/common.js
new file mode 100644
index 00000000000000..25ef7d8e4a3000
--- /dev/null
+++ b/tools/doc/node_modules/js-yaml/lib/js-yaml/common.js
@@ -0,0 +1,59 @@
+'use strict';
+
+
+function isNothing(subject) {
+  return (typeof subject === 'undefined') || (subject === null);
+}
+
+
+function isObject(subject) {
+  return (typeof subject === 'object') && (subject !== null);
+}
+
+
+function toArray(sequence) {
+  if (Array.isArray(sequence)) return sequence;
+  else if (isNothing(sequence)) return [];
+
+  return [ sequence ];
+}
+
+
+function extend(target, source) {
+  var index, length, key, sourceKeys;
+
+  if (source) {
+    sourceKeys = Object.keys(source);
+
+    for (index = 0, length = sourceKeys.length; index < length; index += 1) {
+      key = sourceKeys[index];
+      target[key] = source[key];
+    }
+  }
+
+  return target;
+}
+
+
+function repeat(string, count) {
+  var result = '', cycle;
+
+  for (cycle = 0; cycle < count; cycle += 1) {
+    result += string;
+  }
+
+  return result;
+}
+
+
+function isNegativeZero(number) {
+  return (number === 0) && (Number.NEGATIVE_INFINITY === 1 / number);
+}
+
+
+module.exports.isNothing      = isNothing;
+module.exports.isObject       = isObject;
+module.exports.toArray        = toArray;
+module.exports.repeat         = repeat;
+module.exports.isNegativeZero = isNegativeZero;
+module.exports.extend         = extend;
diff --git a/tools/doc/node_modules/js-yaml/lib/js-yaml/dumper.js b/tools/doc/node_modules/js-yaml/lib/js-yaml/dumper.js
new file mode 100644
index 00000000000000..41d3d457fd0529
--- /dev/null
+++ b/tools/doc/node_modules/js-yaml/lib/js-yaml/dumper.js
@@ -0,0 +1,802 @@
+'use strict';
+
+/*eslint-disable no-use-before-define*/
+
+var common              = require('./common');
+var YAMLException       = require('./exception');
+var DEFAULT_FULL_SCHEMA = require('./schema/default_full');
+var DEFAULT_SAFE_SCHEMA = require('./schema/default_safe');
+
+var _toString       = Object.prototype.toString;
+var _hasOwnProperty = Object.prototype.hasOwnProperty;
+
+var CHAR_TAB                  = 0x09; /* Tab */
+var CHAR_LINE_FEED            = 0x0A; /* LF */
+var CHAR_SPACE                = 0x20; /* Space */
+var CHAR_EXCLAMATION          = 0x21; /* ! */
+var CHAR_DOUBLE_QUOTE         = 0x22; /* " */
+var CHAR_SHARP                = 0x23; /* # */
+var CHAR_PERCENT              = 0x25; /* % */
+var CHAR_AMPERSAND            = 0x26; /* & */
+var CHAR_SINGLE_QUOTE         = 0x27; /* ' */
+var CHAR_ASTERISK             = 0x2A; /* * */
+var CHAR_COMMA                = 0x2C; /* , */
+var CHAR_MINUS                = 0x2D; /* - */
+var CHAR_COLON                = 0x3A; /* : */
+var CHAR_GREATER_THAN         = 0x3E; /* > */
+var CHAR_QUESTION             = 0x3F; /* ? */
+var CHAR_COMMERCIAL_AT        = 0x40; /* @ */
+var CHAR_LEFT_SQUARE_BRACKET  = 0x5B; /* [ */
+var CHAR_RIGHT_SQUARE_BRACKET = 0x5D; /* ] */
+var CHAR_GRAVE_ACCENT         = 0x60; /* ` */
+var CHAR_LEFT_CURLY_BRACKET   = 0x7B; /* { */
+var CHAR_VERTICAL_LINE        = 0x7C; /* | */
+var CHAR_RIGHT_CURLY_BRACKET  = 0x7D; /* } */
+
+var ESCAPE_SEQUENCES = {};
+
+ESCAPE_SEQUENCES[0x00]   = '\\0';
+ESCAPE_SEQUENCES[0x07]   = '\\a';
+ESCAPE_SEQUENCES[0x08]   = '\\b';
+ESCAPE_SEQUENCES[0x09]   = '\\t';
+ESCAPE_SEQUENCES[0x0A]   = '\\n';
+ESCAPE_SEQUENCES[0x0B]   = '\\v';
+ESCAPE_SEQUENCES[0x0C]   = '\\f';
+ESCAPE_SEQUENCES[0x0D]   = '\\r';
+ESCAPE_SEQUENCES[0x1B]   = '\\e';
+ESCAPE_SEQUENCES[0x22]   = '\\"';
+ESCAPE_SEQUENCES[0x5C]   = '\\\\';
+ESCAPE_SEQUENCES[0x85]   = '\\N';
+ESCAPE_SEQUENCES[0xA0]   = '\\_';
+ESCAPE_SEQUENCES[0x2028] = '\\L';
+ESCAPE_SEQUENCES[0x2029] = '\\P';
+
+var DEPRECATED_BOOLEANS_SYNTAX = [
+  'y', 'Y', 'yes', 'Yes', 'YES', 'on', 'On', 'ON',
+  'n', 'N', 'no', 'No', 'NO', 'off', 'Off', 'OFF'
+];
+
+function compileStyleMap(schema, map) {
+  var result, keys, index, length, tag, style, type;
+
+  if (map === null) return {};
+
+  result = {};
+  keys = Object.keys(map);
+
+  for (index = 0, length = keys.length; index < length; index += 1) {
+    tag = keys[index];
+    style = String(map[tag]);
+
+    if (tag.slice(0, 2) === '!!') {
+      tag = 'tag:yaml.org,2002:' + tag.slice(2);
+    }
+
+    type = schema.compiledTypeMap[tag];
+
+    if (type && _hasOwnProperty.call(type.styleAliases, style)) {
+      style = type.styleAliases[style];
+    }
+
+    result[tag] = style;
+  }
+
+  return result;
+}
+
+function encodeHex(character) {
+  var string, handle, length;
+
+  string = character.toString(16).toUpperCase();
+
+  if (character <= 0xFF) {
+    handle = 'x';
+    length = 2;
+  } else if (character <= 0xFFFF) {
+    handle = 'u';
+    length = 4;
+  } else if (character <= 0xFFFFFFFF) {
+    handle = 'U';
+    length = 8;
+  } else {
+    throw new YAMLException('code point within a string may not be greater than 0xFFFFFFFF');
+  }
+
+  return '\\' + handle + common.repeat('0', length - string.length) + string;
+}
+
+function State(options) {
+  this.schema       = options['schema'] || DEFAULT_FULL_SCHEMA;
+  this.indent       = Math.max(1, (options['indent'] || 2));
+  this.skipInvalid  = options['skipInvalid'] || false;
+  this.flowLevel    = (common.isNothing(options['flowLevel']) ? -1 : options['flowLevel']);
+  this.styleMap     = compileStyleMap(this.schema, options['styles'] || null);
+  this.sortKeys     = options['sortKeys'] || false;
+  this.lineWidth    = options['lineWidth'] || 80;
+  this.noRefs       = options['noRefs'] || false;
+  this.noCompatMode = options['noCompatMode'] || false;
+
+  this.implicitTypes = this.schema.compiledImplicit;
+  this.explicitTypes = this.schema.compiledExplicit;
+
+  this.tag = null;
+  this.result = '';
+
+  this.duplicates = [];
+  this.usedDuplicates = null;
+}
+
+// Indents every line in a string. Empty lines (\n only) are not indented.
+function indentString(string, spaces) {
+  var ind = common.repeat(' ', spaces),
+      position = 0,
+      next = -1,
+      result = '',
+      line,
+      length = string.length;
+
+  while (position < length) {
+    next = string.indexOf('\n', position);
+    if (next === -1) {
+      line = string.slice(position);
+      position = length;
+    } else {
+      line = string.slice(position, next + 1);
+      position = next + 1;
+    }
+
+    if (line.length && line !== '\n') result += ind;
+
+    result += line;
+  }
+
+  return result;
+}
+
+function generateNextLine(state, level) {
+  return '\n' + common.repeat(' ', state.indent * level);
+}
+
+function testImplicitResolving(state, str) {
+  var index, length, type;
+
+  for (index = 0, length = state.implicitTypes.length; index < length; index += 1) {
+    type = state.implicitTypes[index];
+
+    if (type.resolve(str)) {
+      return true;
+    }
+  }
+
+  return false;
+}
+
+// [33] s-white ::= s-space | s-tab
+function isWhitespace(c) {
+  return c === CHAR_SPACE || c === CHAR_TAB;
+}
+
+// Returns true if the character can be printed without escaping.
+// From YAML 1.2: "any allowed characters known to be non-printable
+// should also be escaped. [However,] This isn’t mandatory"
+// Derived from nb-char - \t - #x85 - #xA0 - #x2028 - #x2029.
+function isPrintable(c) {
+  return  (0x00020 <= c && c <= 0x00007E)
+      || ((0x000A1 <= c && c <= 0x00D7FF) && c !== 0x2028 && c !== 0x2029)
+      || ((0x0E000 <= c && c <= 0x00FFFD) && c !== 0xFEFF /* BOM */)
+      ||  (0x10000 <= c && c <= 0x10FFFF);
+}
+
+// Simplified test for values allowed after the first character in plain style.
+function isPlainSafe(c) {
+  // Uses a subset of nb-char - c-flow-indicator - ":" - "#"
+  // where nb-char ::= c-printable - b-char - c-byte-order-mark.
+  return isPrintable(c) && c !== 0xFEFF
+    // - c-flow-indicator
+    && c !== CHAR_COMMA
+    && c !== CHAR_LEFT_SQUARE_BRACKET
+    && c !== CHAR_RIGHT_SQUARE_BRACKET
+    && c !== CHAR_LEFT_CURLY_BRACKET
+    && c !== CHAR_RIGHT_CURLY_BRACKET
+    // - ":" - "#"
+    && c !== CHAR_COLON
+    && c !== CHAR_SHARP;
+}
+
+// Simplified test for values allowed as the first character in plain style.
+function isPlainSafeFirst(c) {
+  // Uses a subset of ns-char - c-indicator
+  // where ns-char = nb-char - s-white.
+  return isPrintable(c) && c !== 0xFEFF
+    && !isWhitespace(c) // - s-white
+    // - (c-indicator ::=
+    // “-” | “?” | “:” | “,” | “[” | “]” | “{” | “}”
+    && c !== CHAR_MINUS
+    && c !== CHAR_QUESTION
+    && c !== CHAR_COLON
+    && c !== CHAR_COMMA
+    && c !== CHAR_LEFT_SQUARE_BRACKET
+    && c !== CHAR_RIGHT_SQUARE_BRACKET
+    && c !== CHAR_LEFT_CURLY_BRACKET
+    && c !== CHAR_RIGHT_CURLY_BRACKET
+    // | “#” | “&” | “*” | “!” | “|” | “>” | “'” | “"”
+    && c !== CHAR_SHARP
+    && c !== CHAR_AMPERSAND
+    && c !== CHAR_ASTERISK
+    && c !== CHAR_EXCLAMATION
+    && c !== CHAR_VERTICAL_LINE
+    && c !== CHAR_GREATER_THAN
+    && c !== CHAR_SINGLE_QUOTE
+    && c !== CHAR_DOUBLE_QUOTE
+    // | “%” | “@” | “`”)
+    && c !== CHAR_PERCENT
+    && c !== CHAR_COMMERCIAL_AT
+    && c !== CHAR_GRAVE_ACCENT;
+}
+
+var STYLE_PLAIN   = 1,
+    STYLE_SINGLE  = 2,
+    STYLE_LITERAL = 3,
+    STYLE_FOLDED  = 4,
+    STYLE_DOUBLE  = 5;
+
+// Determines which scalar styles are possible and returns the preferred style.
+// lineWidth = -1 => no limit.
+// Pre-conditions: str.length > 0.
+// Post-conditions:
+//    STYLE_PLAIN or STYLE_SINGLE => no \n are in the string.
+//    STYLE_LITERAL => no lines are suitable for folding (or lineWidth is -1).
+//    STYLE_FOLDED => a line > lineWidth and can be folded (and lineWidth != -1).
+function chooseScalarStyle(string, singleLineOnly, indentPerLevel, lineWidth, testAmbiguousType) {
+  var i;
+  var char;
+  var hasLineBreak = false;
+  var hasFoldableLine = false; // only checked if shouldTrackWidth
+  var shouldTrackWidth = lineWidth !== -1;
+  var previousLineBreak = -1; // count the first line correctly
+  var plain = isPlainSafeFirst(string.charCodeAt(0))
+          && !isWhitespace(string.charCodeAt(string.length - 1));
+
+  if (singleLineOnly) {
+    // Case: no block styles.
+    // Check for disallowed characters to rule out plain and single.
+    for (i = 0; i < string.length; i++) {
+      char = string.charCodeAt(i);
+      if (!isPrintable(char)) {
+        return STYLE_DOUBLE;
+      }
+      plain = plain && isPlainSafe(char);
+    }
+  } else {
+    // Case: block styles permitted.
+    for (i = 0; i < string.length; i++) {
+      char = string.charCodeAt(i);
+      if (char === CHAR_LINE_FEED) {
+        hasLineBreak = true;
+        // Check if any line can be folded.
+        if (shouldTrackWidth) {
+          hasFoldableLine = hasFoldableLine ||
+            // Foldable line = too long, and not more-indented.
+            (i - previousLineBreak - 1 > lineWidth &&
+             string[previousLineBreak + 1] !== ' ');
+          previousLineBreak = i;
+        }
+      } else if (!isPrintable(char)) {
+        return STYLE_DOUBLE;
+      }
+      plain = plain && isPlainSafe(char);
+    }
+    // in case the end is missing a \n
+    hasFoldableLine = hasFoldableLine || (shouldTrackWidth &&
+      (i - previousLineBreak - 1 > lineWidth &&
+       string[previousLineBreak + 1] !== ' '));
+  }
+  // Although every style can represent \n without escaping, prefer block styles
+  // for multiline, since they're more readable and they don't add empty lines.
+  // Also prefer folding a super-long line.
+  if (!hasLineBreak && !hasFoldableLine) {
+    // Strings interpretable as another type have to be quoted;
+    // e.g. the string 'true' vs. the boolean true.
+    return plain && !testAmbiguousType(string)
+      ? STYLE_PLAIN : STYLE_SINGLE;
+  }
+  // Edge case: block indentation indicator can only have one digit.
+  if (string[0] === ' ' && indentPerLevel > 9) {
+    return STYLE_DOUBLE;
+  }
+  // At this point we know block styles are valid.
+  // Prefer literal style unless we want to fold.
+  return hasFoldableLine ? STYLE_FOLDED : STYLE_LITERAL;
+}
+
+// Note: line breaking/folding is implemented for only the folded style.
+// NB. We drop the last trailing newline (if any) of a returned block scalar
+//  since the dumper adds its own newline. This always works:
+//    • No ending newline => unaffected; already using strip "-" chomping.
+//    • Ending newline    => removed then restored.
+//  Importantly, this keeps the "+" chomp indicator from gaining an extra line.
+function writeScalar(state, string, level, iskey) {
+  state.dump = (function () {
+    if (string.length === 0) {
+      return "''";
+    }
+    if (!state.noCompatMode &&
+        DEPRECATED_BOOLEANS_SYNTAX.indexOf(string) !== -1) {
+      return "'" + string + "'";
+    }
+
+    var indent = state.indent * Math.max(1, level); // no 0-indent scalars
+    // As indentation gets deeper, let the width decrease monotonically
+    // to the lower bound min(state.lineWidth, 40).
+    // Note that this implies
+    //  state.lineWidth ≤ 40 + state.indent: width is fixed at the lower bound.
+    //  state.lineWidth > 40 + state.indent: width decreases until the lower bound.
+    // This behaves better than a constant minimum width which disallows narrower options,
+    // or an indent threshold which causes the width to suddenly increase.
+    var lineWidth = state.lineWidth === -1
+      ? -1 : Math.max(Math.min(state.lineWidth, 40), state.lineWidth - indent);
+
+    // Without knowing if keys are implicit/explicit, assume implicit for safety.
+    var singleLineOnly = iskey
+      // No block styles in flow mode.
+      || (state.flowLevel > -1 && level >= state.flowLevel);
+    function testAmbiguity(string) {
+      return testImplicitResolving(state, string);
+    }
+
+    switch (chooseScalarStyle(string, singleLineOnly, state.indent, lineWidth, testAmbiguity)) {
+      case STYLE_PLAIN:
+        return string;
+      case STYLE_SINGLE:
+        return "'" + string.replace(/'/g, "''") + "'";
+      case STYLE_LITERAL:
+        return '|' + blockHeader(string, state.indent)
+          + dropEndingNewline(indentString(string, indent));
+      case STYLE_FOLDED:
+        return '>' + blockHeader(string, state.indent)
+          + dropEndingNewline(indentString(foldString(string, lineWidth), indent));
+      case STYLE_DOUBLE:
+        return '"' + escapeString(string, lineWidth) + '"';
+      default:
+        throw new YAMLException('impossible error: invalid scalar style');
+    }
+  }());
+}
+
+// Pre-conditions: string is valid for a block scalar, 1 <= indentPerLevel <= 9.
+function blockHeader(string, indentPerLevel) {
+  var indentIndicator = (string[0] === ' ') ? String(indentPerLevel) : '';
+
+  // note the special case: the string '\n' counts as a "trailing" empty line.
+  var clip =          string[string.length - 1] === '\n';
+  var keep = clip && (string[string.length - 2] === '\n' || string === '\n');
+  var chomp = keep ? '+' : (clip ? '' : '-');
+
+  return indentIndicator + chomp + '\n';
+}
+
+// (See the note for writeScalar.)
+function dropEndingNewline(string) {
+  return string[string.length - 1] === '\n' ? string.slice(0, -1) : string;
+}
+
+// Note: a long line without a suitable break point will exceed the width limit.
+// Pre-conditions: every char in str isPrintable, str.length > 0, width > 0.
+function foldString(string, width) {
+  // In folded style, $k$ consecutive newlines output as $k+1$ newlines—
+  // unless they're before or after a more-indented line, or at the very
+  // beginning or end, in which case $k$ maps to $k$.
+  // Therefore, parse each chunk as newline(s) followed by a content line.
+  var lineRe = /(\n+)([^\n]*)/g;
+
+  // first line (possibly an empty line)
+  var result = (function () {
+    var nextLF = string.indexOf('\n');
+    nextLF = nextLF !== -1 ? nextLF : string.length;
+    lineRe.lastIndex = nextLF;
+    return foldLine(string.slice(0, nextLF), width);
+  }());
+  // If we haven't reached the first content line yet, don't add an extra \n.
+  var prevMoreIndented = string[0] === '\n' || string[0] === ' ';
+  var moreIndented;
+
+  // rest of the lines
+  var match;
+  while ((match = lineRe.exec(string))) {
+    var prefix = match[1], line = match[2];
+    moreIndented = (line[0] === ' ');
+    result += prefix
+      + (!prevMoreIndented && !moreIndented && line !== ''
+        ? '\n' : '')
+      + foldLine(line, width);
+    prevMoreIndented = moreIndented;
+  }
+
+  return result;
+}
+
+// Greedy line breaking.
+// Picks the longest line under the limit each time,
+// otherwise settles for the shortest line over the limit.
+// NB. More-indented lines *cannot* be folded, as that would add an extra \n.
+function foldLine(line, width) {
+  if (line === '' || line[0] === ' ') return line;
+
+  // Since a more-indented line adds a \n, breaks can't be followed by a space.
+  var breakRe = / [^ ]/g; // note: the match index will always be <= length-2.
+  var match;
+  // start is an inclusive index. end, curr, and next are exclusive.
+  var start = 0, end, curr = 0, next = 0;
+  var result = '';
+
+  // Invariants: 0 <= start <= length-1.
+  //   0 <= curr <= next <= max(0, length-2). curr - start <= width.
+  // Inside the loop:
+  //   A match implies length >= 2, so curr and next are <= length-2.
+  while ((match = breakRe.exec(line))) {
+    next = match.index;
+    // maintain invariant: curr - start <= width
+    if (next - start > width) {
+      end = (curr > start) ? curr : next; // derive end <= length-2
+      result += '\n' + line.slice(start, end);
+      // skip the space that was output as \n
+      start = end + 1;                    // derive start <= length-1
+    }
+    curr = next;
+  }
+
+  // By the invariants, start <= length-1, so there is something left over.
+  // It is either the whole string or a part starting from non-whitespace.
+  result += '\n';
+  // Insert a break if the remainder is too long and there is a break available.
+  if (line.length - start > width && curr > start) {
+    result += line.slice(start, curr) + '\n' + line.slice(curr + 1);
+  } else {
+    result += line.slice(start);
+  }
+
+  return result.slice(1); // drop extra \n joiner
+}
+
+// Escapes a double-quoted string.
+function escapeString(string) {
+  var result = '';
+  var char;
+  var escapeSeq;
+
+  for (var i = 0; i < string.length; i++) {
+    char = string.charCodeAt(i);
+    escapeSeq = ESCAPE_SEQUENCES[char];
+    result += !escapeSeq && isPrintable(char)
+      ? string[i]
+      : escapeSeq || encodeHex(char);
+  }
+
+  return result;
+}
+
+function writeFlowSequence(state, level, object) {
+  var _result = '',
+      _tag    = state.tag,
+      index,
+      length;
+
+  for (index = 0, length = object.length; index < length; index += 1) {
+    // Write only valid elements.
+    if (writeNode(state, level, object[index], false, false)) {
+      if (index !== 0) _result += ', ';
+      _result += state.dump;
+    }
+  }
+
+  state.tag = _tag;
+  state.dump = '[' + _result + ']';
+}
+
+function writeBlockSequence(state, level, object, compact) {
+  var _result = '',
+      _tag    = state.tag,
+      index,
+      length;
+
+  for (index = 0, length = object.length; index < length; index += 1) {
+    // Write only valid elements.
+    if (writeNode(state, level + 1, object[index], true, true)) {
+      if (!compact || index !== 0) {
+        _result += generateNextLine(state, level);
+      }
+      _result += '- ' + state.dump;
+    }
+  }
+
+  state.tag = _tag;
+  state.dump = _result || '[]'; // Empty sequence if no valid values.
+}
+
+function writeFlowMapping(state, level, object) {
+  var _result       = '',
+      _tag          = state.tag,
+      objectKeyList = Object.keys(object),
+      index,
+      length,
+      objectKey,
+      objectValue,
+      pairBuffer;
+
+  for (index = 0, length = objectKeyList.length; index < length; index += 1) {
+    pairBuffer = '';
+
+    if (index !== 0) pairBuffer += ', ';
+
+    objectKey = objectKeyList[index];
+    objectValue = object[objectKey];
+
+    if (!writeNode(state, level, objectKey, false, false)) {
+      continue; // Skip this pair because of invalid key;
+    }
+
+    if (state.dump.length > 1024) pairBuffer += '? ';
+
+    pairBuffer += state.dump + ': ';
+
+    if (!writeNode(state, level, objectValue, false, false)) {
+      continue; // Skip this pair because of invalid value.
+    }
+
+    pairBuffer += state.dump;
+
+    // Both key and value are valid.
+    _result += pairBuffer;
+  }
+
+  state.tag = _tag;
+  state.dump = '{' + _result + '}';
+}
+
+function writeBlockMapping(state, level, object, compact) {
+  var _result       = '',
+      _tag          = state.tag,
+      objectKeyList = Object.keys(object),
+      index,
+      length,
+      objectKey,
+      objectValue,
+      explicitPair,
+      pairBuffer;
+
+  // Allow sorting keys so that the output file is deterministic
+  if (state.sortKeys === true) {
+    // Default sorting
+    objectKeyList.sort();
+  } else if (typeof state.sortKeys === 'function') {
+    // Custom sort function
+    objectKeyList.sort(state.sortKeys);
+  } else if (state.sortKeys) {
+    // Something is wrong
+    throw new YAMLException('sortKeys must be a boolean or a function');
+  }
+
+  for (index = 0, length = objectKeyList.length; index < length; index += 1) {
+    pairBuffer = '';
+
+    if (!compact || index !== 0) {
+      pairBuffer += generateNextLine(state, level);
+    }
+
+    objectKey = objectKeyList[index];
+    objectValue = object[objectKey];
+
+    if (!writeNode(state, level + 1, objectKey, true, true, true)) {
+      continue; // Skip this pair because of invalid key.
+    }
+
+    explicitPair = (state.tag !== null && state.tag !== '?') ||
+                   (state.dump && state.dump.length > 1024);
+
+    if (explicitPair) {
+      if (state.dump && CHAR_LINE_FEED === state.dump.charCodeAt(0)) {
+        pairBuffer += '?';
+      } else {
+        pairBuffer += '? ';
+      }
+    }
+
+    pairBuffer += state.dump;
+
+    if (explicitPair) {
+      pairBuffer += generateNextLine(state, level);
+    }
+
+    if (!writeNode(state, level + 1, objectValue, true, explicitPair)) {
+      continue; // Skip this pair because of invalid value.
+    }
+
+    if (state.dump && CHAR_LINE_FEED === state.dump.charCodeAt(0)) {
+      pairBuffer += ':';
+    } else {
+      pairBuffer += ': ';
+    }
+
+    pairBuffer += state.dump;
+
+    // Both key and value are valid.
+    _result += pairBuffer;
+  }
+
+  state.tag = _tag;
+  state.dump = _result || '{}'; // Empty mapping if no valid pairs.
+}
+
+function detectType(state, object, explicit) {
+  var _result, typeList, index, length, type, style;
+
+  typeList = explicit ? state.explicitTypes : state.implicitTypes;
+
+  for (index = 0, length = typeList.length; index < length; index += 1) {
+    type = typeList[index];
+
+    if ((type.instanceOf  || type.predicate) &&
+        (!type.instanceOf || ((typeof object === 'object') && (object instanceof type.instanceOf))) &&
+        (!type.predicate  || type.predicate(object))) {
+
+      state.tag = explicit ? type.tag : '?';
+
+      if (type.represent) {
+        style = state.styleMap[type.tag] || type.defaultStyle;
+
+        if (_toString.call(type.represent) === '[object Function]') {
+          _result = type.represent(object, style);
+        } else if (_hasOwnProperty.call(type.represent, style)) {
+          _result = type.represent[style](object, style);
+        } else {
+          throw new YAMLException('!<' + type.tag + '> tag resolver accepts not "' + style + '" style');
+        }
+
+        state.dump = _result;
+      }
+
+      return true;
+    }
+  }
+
+  return false;
+}
+
+// Serializes `object` and writes it to global `result`.
+// Returns true on success, or false on invalid object.
+//
+function writeNode(state, level, object, block, compact, iskey) {
+  state.tag = null;
+  state.dump = object;
+
+  if (!detectType(state, object, false)) {
+    detectType(state, object, true);
+  }
+
+  var type = _toString.call(state.dump);
+
+  if (block) {
+    block = (state.flowLevel < 0 || state.flowLevel > level);
+  }
+
+  var objectOrArray = type === '[object Object]' || type === '[object Array]',
+      duplicateIndex,
+      duplicate;
+
+  if (objectOrArray) {
+    duplicateIndex = state.duplicates.indexOf(object);
+    duplicate = duplicateIndex !== -1;
+  }
+
+  if ((state.tag !== null && state.tag !== '?') || duplicate || (state.indent !== 2 && level > 0)) {
+    compact = false;
+  }
+
+  if (duplicate && state.usedDuplicates[duplicateIndex]) {
+    state.dump = '*ref_' + duplicateIndex;
+  } else {
+    if (objectOrArray && duplicate && !state.usedDuplicates[duplicateIndex]) {
+      state.usedDuplicates[duplicateIndex] = true;
+    }
+    if (type === '[object Object]') {
+      if (block && (Object.keys(state.dump).length !== 0)) {
+        writeBlockMapping(state, level, state.dump, compact);
+        if (duplicate) {
+          state.dump = '&ref_' + duplicateIndex + state.dump;
+        }
+      } else {
+        writeFlowMapping(state, level, state.dump);
+        if (duplicate) {
+          state.dump = '&ref_' + duplicateIndex + ' ' + state.dump;
+        }
+      }
+    } else if (type === '[object Array]') {
+      if (block && (state.dump.length !== 0)) {
+        writeBlockSequence(state, level, state.dump, compact);
+        if (duplicate) {
+          state.dump = '&ref_' + duplicateIndex + state.dump;
+        }
+      } else {
+        writeFlowSequence(state, level, state.dump);
+        if (duplicate) {
+          state.dump = '&ref_' + duplicateIndex + ' ' + state.dump;
+        }
+      }
+    } else if (type === '[object String]') {
+      if (state.tag !== '?') {
+        writeScalar(state, state.dump, level, iskey);
+      }
+    } else {
+      if (state.skipInvalid) return false;
+      throw new YAMLException('unacceptable kind of an object to dump ' + type);
+    }
+
+    if (state.tag !== null && state.tag !== '?') {
+      state.dump = '!<' + state.tag + '> ' + state.dump;
+    }
+  }
+
+  return true;
+}
+
+function getDuplicateReferences(object, state) {
+  var objects = [],
+      duplicatesIndexes = [],
+      index,
+      length;
+
+  inspectNode(object, objects, duplicatesIndexes);
+
+  for (index = 0, length = duplicatesIndexes.length; index < length; index += 1) {
+    state.duplicates.push(objects[duplicatesIndexes[index]]);
+  }
+  state.usedDuplicates = new Array(length);
+}
+
+function inspectNode(object, objects, duplicatesIndexes) {
+  var objectKeyList,
+      index,
+      length;
+
+  if (object !== null && typeof object === 'object') {
+    index = objects.indexOf(object);
+    if (index !== -1) {
+      if (duplicatesIndexes.indexOf(index) === -1) {
+        duplicatesIndexes.push(index);
+      }
+    } else {
+      objects.push(object);
+
+      if (Array.isArray(object)) {
+        for (index = 0, length = object.length; index < length; index += 1) {
+          inspectNode(object[index], objects, duplicatesIndexes);
+        }
+      } else {
+        objectKeyList = Object.keys(object);
+
+        for (index = 0, length = objectKeyList.length; index < length; index += 1) {
+          inspectNode(object[objectKeyList[index]], objects, duplicatesIndexes);
+        }
+      }
+    }
+  }
+}
+
+function dump(input, options) {
+  options = options || {};
+
+  var state = new State(options);
+
+  if (!state.noRefs) getDuplicateReferences(input, state);
+
+  if (writeNode(state, 0, input, true, true)) return state.dump + '\n';
+
+  return '';
+}
+
+function safeDump(input, options) {
+  return dump(input, common.extend({ schema: DEFAULT_SAFE_SCHEMA }, options));
+}
+
+module.exports.dump     = dump;
+module.exports.safeDump = safeDump;
diff --git a/tools/doc/node_modules/js-yaml/lib/js-yaml/exception.js b/tools/doc/node_modules/js-yaml/lib/js-yaml/exception.js
new file mode 100644
index 00000000000000..cf4e625209a7dc
--- /dev/null
+++ b/tools/doc/node_modules/js-yaml/lib/js-yaml/exception.js
@@ -0,0 +1,43 @@
+// YAML error class. http://stackoverflow.com/questions/8458984
+//
+'use strict';
+
+function YAMLException(reason, mark) {
+  // Super constructor
+  Error.call(this);
+
+  // Include stack trace in error object
+  if (Error.captureStackTrace) {
+    // Chrome and NodeJS
+    Error.captureStackTrace(this, this.constructor);
+  } else {
+    // FF, IE 10+ and Safari 6+. Fallback for others
+    this.stack = (new Error()).stack || '';
+  }
+
+  this.name = 'YAMLException';
+  this.reason = reason;
+  this.mark = mark;
+  this.message = (this.reason || '(unknown reason)') + (this.mark ? ' ' + this.mark.toString() : '');
+}
+
+
+// Inherit from Error
+YAMLException.prototype = Object.create(Error.prototype);
+YAMLException.prototype.constructor = YAMLException;
+
+
+YAMLException.prototype.toString = function toString(compact) {
+  var result = this.name + ': ';
+
+  result += this.reason || '(unknown reason)';
+
+  if (!compact && this.mark) {
+    result += ' ' + this.mark.toString();
+  }
+
+  return result;
+};
+
+
+module.exports = YAMLException;
diff --git a/tools/doc/node_modules/js-yaml/lib/js-yaml/loader.js b/tools/doc/node_modules/js-yaml/lib/js-yaml/loader.js
new file mode 100644
index 00000000000000..8966d6bda4caff
--- /dev/null
+++ b/tools/doc/node_modules/js-yaml/lib/js-yaml/loader.js
@@ -0,0 +1,1586 @@
+'use strict';
+
+/*eslint-disable max-len,no-use-before-define*/
+
+var common              = require('./common');
+var YAMLException       = require('./exception');
+var Mark                = require('./mark');
+var DEFAULT_SAFE_SCHEMA = require('./schema/default_safe');
+var DEFAULT_FULL_SCHEMA = require('./schema/default_full');
+
+
+var _hasOwnProperty = Object.prototype.hasOwnProperty;
+
+
+var CONTEXT_FLOW_IN   = 1;
+var CONTEXT_FLOW_OUT  = 2;
+var CONTEXT_BLOCK_IN  = 3;
+var CONTEXT_BLOCK_OUT = 4;
+
+
+var CHOMPING_CLIP  = 1;
+var CHOMPING_STRIP = 2;
+var CHOMPING_KEEP  = 3;
+
+
+var PATTERN_NON_PRINTABLE         = /[\x00-\x08\x0B\x0C\x0E-\x1F\x7F-\x84\x86-\x9F\uFFFE\uFFFF]|[\uD800-\uDBFF](?![\uDC00-\uDFFF])|(?:[^\uD800-\uDBFF]|^)[\uDC00-\uDFFF]/;
+var PATTERN_NON_ASCII_LINE_BREAKS = /[\x85\u2028\u2029]/;
+var PATTERN_FLOW_INDICATORS       = /[,\[\]\{\}]/;
+var PATTERN_TAG_HANDLE            = /^(?:!|!!|![a-z\-]+!)$/i;
+var PATTERN_TAG_URI               = /^(?:!|[^,\[\]\{\}])(?:%[0-9a-f]{2}|[0-9a-z\-#;\/\?:@&=\+\$,_\.!~\*'\(\)\[\]])*$/i;
+
+
+function is_EOL(c) {
+  return (c === 0x0A/* LF */) || (c === 0x0D/* CR */);
+}
+
+function is_WHITE_SPACE(c) {
+  return (c === 0x09/* Tab */) || (c === 0x20/* Space */);
+}
+
+function is_WS_OR_EOL(c) {
+  return (c === 0x09/* Tab */) ||
+         (c === 0x20/* Space */) ||
+         (c === 0x0A/* LF */) ||
+         (c === 0x0D/* CR */);
+}
+
+function is_FLOW_INDICATOR(c) {
+  return c === 0x2C/* , */ ||
+         c === 0x5B/* [ */ ||
+         c === 0x5D/* ] */ ||
+         c === 0x7B/* { */ ||
+         c === 0x7D/* } */;
+}
+
+function fromHexCode(c) {
+  var lc;
+
+  if ((0x30/* 0 */ <= c) && (c <= 0x39/* 9 */)) {
+    return c - 0x30;
+  }
+
+  /*eslint-disable no-bitwise*/
+  lc = c | 0x20;
+
+  if ((0x61/* a */ <= lc) && (lc <= 0x66/* f */)) {
+    return lc - 0x61 + 10;
+  }
+
+  return -1;
+}
+
+function escapedHexLen(c) {
+  if (c === 0x78/* x */) { return 2; }
+  if (c === 0x75/* u */) { return 4; }
+  if (c === 0x55/* U */) { return 8; }
+  return 0;
+}
+
+function fromDecimalCode(c) {
+  if ((0x30/* 0 */ <= c) && (c <= 0x39/* 9 */)) {
+    return c - 0x30;
+  }
+
+  return -1;
+}
+
+function simpleEscapeSequence(c) {
+  return (c === 0x30/* 0 */) ? '\x00' :
+        (c === 0x61/* a */) ? '\x07' :
+        (c === 0x62/* b */) ? '\x08' :
+        (c === 0x74/* t */) ? '\x09' :
+        (c === 0x09/* Tab */) ? '\x09' :
+        (c === 0x6E/* n */) ? '\x0A' :
+        (c === 0x76/* v */) ? '\x0B' :
+        (c === 0x66/* f */) ? '\x0C' :
+        (c === 0x72/* r */) ? '\x0D' :
+        (c === 0x65/* e */) ? '\x1B' :
+        (c === 0x20/* Space */) ? ' ' :
+        (c === 0x22/* " */) ? '\x22' :
+        (c === 0x2F/* / */) ? '/' :
+        (c === 0x5C/* \ */) ? '\x5C' :
+        (c === 0x4E/* N */) ? '\x85' :
+        (c === 0x5F/* _ */) ? '\xA0' :
+        (c === 0x4C/* L */) ? '\u2028' :
+        (c === 0x50/* P */) ? '\u2029' : '';
+}
+
+function charFromCodepoint(c) {
+  if (c <= 0xFFFF) {
+    return String.fromCharCode(c);
+  }
+  // Encode UTF-16 surrogate pair
+  // https://en.wikipedia.org/wiki/UTF-16#Code_points_U.2B010000_to_U.2B10FFFF
+  return String.fromCharCode(((c - 0x010000) >> 10) + 0xD800,
+                             ((c - 0x010000) & 0x03FF) + 0xDC00);
+}
+
+var simpleEscapeCheck = new Array(256); // integer, for fast access
+var simpleEscapeMap = new Array(256);
+for (var i = 0; i < 256; i++) {
+  simpleEscapeCheck[i] = simpleEscapeSequence(i) ? 1 : 0;
+  simpleEscapeMap[i] = simpleEscapeSequence(i);
+}
+
+
+function State(input, options) {
+  this.input = input;
+
+  this.filename  = options['filename']  || null;
+  this.schema    = options['schema']    || DEFAULT_FULL_SCHEMA;
+  this.onWarning = options['onWarning'] || null;
+  this.legacy    = options['legacy']    || false;
+  this.json      = options['json']      || false;
+  this.listener  = options['listener']  || null;
+
+  this.implicitTypes = this.schema.compiledImplicit;
+  this.typeMap       = this.schema.compiledTypeMap;
+
+  this.length     = input.length;
+  this.position   = 0;
+  this.line       = 0;
+  this.lineStart  = 0;
+  this.lineIndent = 0;
+
+  this.documents = [];
+
+  /*
+  this.version;
+  this.checkLineBreaks;
+  this.tagMap;
+  this.anchorMap;
+  this.tag;
+  this.anchor;
+  this.kind;
+  this.result;*/
+
+}
+
+
+function generateError(state, message) {
+  return new YAMLException(
+    message,
+    new Mark(state.filename, state.input, state.position, state.line, (state.position - state.lineStart)));
+}
+
+function throwError(state, message) {
+  throw generateError(state, message);
+}
+
+function throwWarning(state, message) {
+  if (state.onWarning) {
+    state.onWarning.call(null, generateError(state, message));
+  }
+}
+
+
+var directiveHandlers = {
+
+  YAML: function handleYamlDirective(state, name, args) {
+
+    var match, major, minor;
+
+    if (state.version !== null) {
+      throwError(state, 'duplication of %YAML directive');
+    }
+
+    if (args.length !== 1) {
+      throwError(state, 'YAML directive accepts exactly one argument');
+    }
+
+    match = /^([0-9]+)\.([0-9]+)$/.exec(args[0]);
+
+    if (match === null) {
+      throwError(state, 'ill-formed argument of the YAML directive');
+    }
+
+    major = parseInt(match[1], 10);
+    minor = parseInt(match[2], 10);
+
+    if (major !== 1) {
+      throwError(state, 'unacceptable YAML version of the document');
+    }
+
+    state.version = args[0];
+    state.checkLineBreaks = (minor < 2);
+
+    if (minor !== 1 && minor !== 2) {
+      throwWarning(state, 'unsupported YAML version of the document');
+    }
+  },
+
+  TAG: function handleTagDirective(state, name, args) {
+
+    var handle, prefix;
+
+    if (args.length !== 2) {
+      throwError(state, 'TAG directive accepts exactly two arguments');
+    }
+
+    handle = args[0];
+    prefix = args[1];
+
+    if (!PATTERN_TAG_HANDLE.test(handle)) {
+      throwError(state, 'ill-formed tag handle (first argument) of the TAG directive');
+    }
+
+    if (_hasOwnProperty.call(state.tagMap, handle)) {
+      throwError(state, 'there is a previously declared suffix for "' + handle + '" tag handle');
+    }
+
+    if (!PATTERN_TAG_URI.test(prefix)) {
+      throwError(state, 'ill-formed tag prefix (second argument) of the TAG directive');
+    }
+
+    state.tagMap[handle] = prefix;
+  }
+};
+
+
+function captureSegment(state, start, end, checkJson) {
+  var _position, _length, _character, _result;
+
+  if (start < end) {
+    _result = state.input.slice(start, end);
+
+    if (checkJson) {
+      for (_position = 0, _length = _result.length;
+           _position < _length;
+           _position += 1) {
+        _character = _result.charCodeAt(_position);
+        if (!(_character === 0x09 ||
+              (0x20 <= _character && _character <= 0x10FFFF))) {
+          throwError(state, 'expected valid JSON character');
+        }
+      }
+    } else if (PATTERN_NON_PRINTABLE.test(_result)) {
+      throwError(state, 'the stream contains non-printable characters');
+    }
+
+    state.result += _result;
+  }
+}
+
+function mergeMappings(state, destination, source, overridableKeys) {
+  var sourceKeys, key, index, quantity;
+
+  if (!common.isObject(source)) {
+    throwError(state, 'cannot merge mappings; the provided source object is unacceptable');
+  }
+
+  sourceKeys = Object.keys(source);
+
+  for (index = 0, quantity = sourceKeys.length; index < quantity; index += 1) {
+    key = sourceKeys[index];
+
+    if (!_hasOwnProperty.call(destination, key)) {
+      destination[key] = source[key];
+      overridableKeys[key] = true;
+    }
+  }
+}
+
+function storeMappingPair(state, _result, overridableKeys, keyTag, keyNode, valueNode) {
+  var index, quantity;
+
+  keyNode = String(keyNode);
+
+  if (_result === null) {
+    _result = {};
+  }
+
+  if (keyTag === 'tag:yaml.org,2002:merge') {
+    if (Array.isArray(valueNode)) {
+      for (index = 0, quantity = valueNode.length; index < quantity; index += 1) {
+        mergeMappings(state, _result, valueNode[index], overridableKeys);
+      }
+    } else {
+      mergeMappings(state, _result, valueNode, overridableKeys);
+    }
+  } else {
+    if (!state.json &&
+        !_hasOwnProperty.call(overridableKeys, keyNode) &&
+        _hasOwnProperty.call(_result, keyNode)) {
+      throwError(state, 'duplicated mapping key');
+    }
+    _result[keyNode] = valueNode;
+    delete overridableKeys[keyNode];
+  }
+
+  return _result;
+}
+
+function readLineBreak(state) {
+  var ch;
+
+  ch = state.input.charCodeAt(state.position);
+
+  if (ch === 0x0A/* LF */) {
+    state.position++;
+  } else if (ch === 0x0D/* CR */) {
+    state.position++;
+    if (state.input.charCodeAt(state.position) === 0x0A/* LF */) {
+      state.position++;
+    }
+  } else {
+    throwError(state, 'a line break is expected');
+  }
+
+  state.line += 1;
+  state.lineStart = state.position;
+}
+
+function skipSeparationSpace(state, allowComments, checkIndent) {
+  var lineBreaks = 0,
+      ch = state.input.charCodeAt(state.position);
+
+  while (ch !== 0) {
+    while (is_WHITE_SPACE(ch)) {
+      ch = state.input.charCodeAt(++state.position);
+    }
+
+    if (allowComments && ch === 0x23/* # */) {
+      do {
+        ch = state.input.charCodeAt(++state.position);
+      } while (ch !== 0x0A/* LF */ && ch !== 0x0D/* CR */ && ch !== 0);
+    }
+
+    if (is_EOL(ch)) {
+      readLineBreak(state);
+
+      ch = state.input.charCodeAt(state.position);
+      lineBreaks++;
+      state.lineIndent = 0;
+
+      while (ch === 0x20/* Space */) {
+        state.lineIndent++;
+        ch = state.input.charCodeAt(++state.position);
+      }
+    } else {
+      break;
+    }
+  }
+
+  if (checkIndent !== -1 && lineBreaks !== 0 && state.lineIndent < checkIndent) {
+    throwWarning(state, 'deficient indentation');
+  }
+
+  return lineBreaks;
+}
+
+function testDocumentSeparator(state) {
+  var _position = state.position,
+      ch;
+
+  ch = state.input.charCodeAt(_position);
+
+  // Condition state.position === state.lineStart is tested
+  // in parent on each call, for efficiency. No needs to test here again.
+  if ((ch === 0x2D/* - */ || ch === 0x2E/* . */) &&
+      ch === state.input.charCodeAt(_position + 1) &&
+      ch === state.input.charCodeAt(_position + 2)) {
+
+    _position += 3;
+
+    ch = state.input.charCodeAt(_position);
+
+    if (ch === 0 || is_WS_OR_EOL(ch)) {
+      return true;
+    }
+  }
+
+  return false;
+}
+
+function writeFoldedLines(state, count) {
+  if (count === 1) {
+    state.result += ' ';
+  } else if (count > 1) {
+    state.result += common.repeat('\n', count - 1);
+  }
+}
+
+
+function readPlainScalar(state, nodeIndent, withinFlowCollection) {
+  var preceding,
+      following,
+      captureStart,
+      captureEnd,
+      hasPendingContent,
+      _line,
+      _lineStart,
+      _lineIndent,
+      _kind = state.kind,
+      _result = state.result,
+      ch;
+
+  ch = state.input.charCodeAt(state.position);
+
+  if (is_WS_OR_EOL(ch)      ||
+      is_FLOW_INDICATOR(ch) ||
+      ch === 0x23/* # */    ||
+      ch === 0x26/* & */    ||
+      ch === 0x2A/* * */    ||
+      ch === 0x21/* ! */    ||
+      ch === 0x7C/* | */    ||
+      ch === 0x3E/* > */    ||
+      ch === 0x27/* ' */    ||
+      ch === 0x22/* " */    ||
+      ch === 0x25/* % */    ||
+      ch === 0x40/* @ */    ||
+      ch === 0x60/* ` */) {
+    return false;
+  }
+
+  if (ch === 0x3F/* ? */ || ch === 0x2D/* - */) {
+    following = state.input.charCodeAt(state.position + 1);
+
+    if (is_WS_OR_EOL(following) ||
+        withinFlowCollection && is_FLOW_INDICATOR(following)) {
+      return false;
+    }
+  }
+
+  state.kind = 'scalar';
+  state.result = '';
+  captureStart = captureEnd = state.position;
+  hasPendingContent = false;
+
+  while (ch !== 0) {
+    if (ch === 0x3A/* : */) {
+      following = state.input.charCodeAt(state.position + 1);
+
+      if (is_WS_OR_EOL(following) ||
+          withinFlowCollection && is_FLOW_INDICATOR(following)) {
+        break;
+      }
+
+    } else if (ch === 0x23/* # */) {
+      preceding = state.input.charCodeAt(state.position - 1);
+
+      if (is_WS_OR_EOL(preceding)) {
+        break;
+      }
+
+    } else if ((state.position === state.lineStart && testDocumentSeparator(state)) ||
+               withinFlowCollection && is_FLOW_INDICATOR(ch)) {
+      break;
+
+    } else if (is_EOL(ch)) {
+      _line = state.line;
+      _lineStart = state.lineStart;
+      _lineIndent = state.lineIndent;
+      skipSeparationSpace(state, false, -1);
+
+      if (state.lineIndent >= nodeIndent) {
+        hasPendingContent = true;
+        ch = state.input.charCodeAt(state.position);
+        continue;
+      } else {
+        state.position = captureEnd;
+        state.line = _line;
+        state.lineStart = _lineStart;
+        state.lineIndent = _lineIndent;
+        break;
+      }
+    }
+
+    if (hasPendingContent) {
+      captureSegment(state, captureStart, captureEnd, false);
+      writeFoldedLines(state, state.line - _line);
+      captureStart = captureEnd = state.position;
+      hasPendingContent = false;
+    }
+
+    if (!is_WHITE_SPACE(ch)) {
+      captureEnd = state.position + 1;
+    }
+
+    ch = state.input.charCodeAt(++state.position);
+  }
+
+  captureSegment(state, captureStart, captureEnd, false);
+
+  if (state.result) {
+    return true;
+  }
+
+  state.kind = _kind;
+  state.result = _result;
+  return false;
+}
+
+function readSingleQuotedScalar(state, nodeIndent) {
+  var ch,
+      captureStart, captureEnd;
+
+  ch = state.input.charCodeAt(state.position);
+
+  if (ch !== 0x27/* ' */) {
+    return false;
+  }
+
+  state.kind = 'scalar';
+  state.result = '';
+  state.position++;
+  captureStart = captureEnd = state.position;
+
+  while ((ch = state.input.charCodeAt(state.position)) !== 0) {
+    if (ch === 0x27/* ' */) {
+      captureSegment(state, captureStart, state.position, true);
+      ch = state.input.charCodeAt(++state.position);
+
+      if (ch === 0x27/* ' */) {
+        captureStart = captureEnd = state.position;
+        state.position++;
+      } else {
+        return true;
+      }
+
+    } else if (is_EOL(ch)) {
+      captureSegment(state, captureStart, captureEnd, true);
+      writeFoldedLines(state, skipSeparationSpace(state, false, nodeIndent));
+      captureStart = captureEnd = state.position;
+
+    } else if (state.position === state.lineStart && testDocumentSeparator(state)) {
+      throwError(state, 'unexpected end of the document within a single quoted scalar');
+
+    } else {
+      state.position++;
+      captureEnd = state.position;
+    }
+  }
+
+  throwError(state, 'unexpected end of the stream within a single quoted scalar');
+}
+
+function readDoubleQuotedScalar(state, nodeIndent) {
+  var captureStart,
+      captureEnd,
+      hexLength,
+      hexResult,
+      tmp,
+      ch;
+
+  ch = state.input.charCodeAt(state.position);
+
+  if (ch !== 0x22/* " */) {
+    return false;
+  }
+
+  state.kind = 'scalar';
+  state.result = '';
+  state.position++;
+  captureStart = captureEnd = state.position;
+
+  while ((ch = state.input.charCodeAt(state.position)) !== 0) {
+    if (ch === 0x22/* " */) {
+      captureSegment(state, captureStart, state.position, true);
+      state.position++;
+      return true;
+
+    } else if (ch === 0x5C/* \ */) {
+      captureSegment(state, captureStart, state.position, true);
+      ch = state.input.charCodeAt(++state.position);
+
+      if (is_EOL(ch)) {
+        skipSeparationSpace(state, false, nodeIndent);
+
+        // TODO: rework to inline fn with no type cast?
+      } else if (ch < 256 && simpleEscapeCheck[ch]) {
+        state.result += simpleEscapeMap[ch];
+        state.position++;
+
+      } else if ((tmp = escapedHexLen(ch)) > 0) {
+        hexLength = tmp;
+        hexResult = 0;
+
+        for (; hexLength > 0; hexLength--) {
+          ch = state.input.charCodeAt(++state.position);
+
+          if ((tmp = fromHexCode(ch)) >= 0) {
+            hexResult = (hexResult << 4) + tmp;
+
+          } else {
+            throwError(state, 'expected hexadecimal character');
+          }
+        }
+
+        state.result += charFromCodepoint(hexResult);
+
+        state.position++;
+
+      } else {
+        throwError(state, 'unknown escape sequence');
+      }
+
+      captureStart = captureEnd = state.position;
+
+    } else if (is_EOL(ch)) {
+      captureSegment(state, captureStart, captureEnd, true);
+      writeFoldedLines(state, skipSeparationSpace(state, false, nodeIndent));
+      captureStart = captureEnd = state.position;
+
+    } else if (state.position === state.lineStart && testDocumentSeparator(state)) {
+      throwError(state, 'unexpected end of the document within a double quoted scalar');
+
+    } else {
+      state.position++;
+      captureEnd = state.position;
+    }
+  }
+
+  throwError(state, 'unexpected end of the stream within a double quoted scalar');
+}
+
+function readFlowCollection(state, nodeIndent) {
+  var readNext = true,
+      _line,
+      _tag     = state.tag,
+      _result,
+      _anchor  = state.anchor,
+      following,
+      terminator,
+      isPair,
+      isExplicitPair,
+      isMapping,
+      overridableKeys = {},
+      keyNode,
+      keyTag,
+      valueNode,
+      ch;
+
+  ch = state.input.charCodeAt(state.position);
+
+  if (ch === 0x5B/* [ */) {
+    terminator = 0x5D;/* ] */
+    isMapping = false;
+    _result = [];
+  } else if (ch === 0x7B/* { */) {
+    terminator = 0x7D;/* } */
+    isMapping = true;
+    _result = {};
+  } else {
+    return false;
+  }
+
+  if (state.anchor !== null) {
+    state.anchorMap[state.anchor] = _result;
+  }
+
+  ch = state.input.charCodeAt(++state.position);
+
+  while (ch !== 0) {
+    skipSeparationSpace(state, true, nodeIndent);
+
+    ch = state.input.charCodeAt(state.position);
+
+    if (ch === terminator) {
+      state.position++;
+      state.tag = _tag;
+      state.anchor = _anchor;
+      state.kind = isMapping ? 'mapping' : 'sequence';
+      state.result = _result;
+      return true;
+    } else if (!readNext) {
+      throwError(state, 'missed comma between flow collection entries');
+    }
+
+    keyTag = keyNode = valueNode = null;
+    isPair = isExplicitPair = false;
+
+    if (ch === 0x3F/* ? */) {
+      following = state.input.charCodeAt(state.position + 1);
+
+      if (is_WS_OR_EOL(following)) {
+        isPair = isExplicitPair = true;
+        state.position++;
+        skipSeparationSpace(state, true, nodeIndent);
+      }
+    }
+
+    _line = state.line;
+    composeNode(state, nodeIndent, CONTEXT_FLOW_IN, false, true);
+    keyTag = state.tag;
+    keyNode = state.result;
+    skipSeparationSpace(state, true, nodeIndent);
+
+    ch = state.input.charCodeAt(state.position);
+
+    if ((isExplicitPair || state.line === _line) && ch === 0x3A/* : */) {
+      isPair = true;
+      ch = state.input.charCodeAt(++state.position);
+      skipSeparationSpace(state, true, nodeIndent);
+      composeNode(state, nodeIndent, CONTEXT_FLOW_IN, false, true);
+      valueNode = state.result;
+    }
+
+    if (isMapping) {
+      storeMappingPair(state, _result, overridableKeys, keyTag, keyNode, valueNode);
+    } else if (isPair) {
+      _result.push(storeMappingPair(state, null, overridableKeys, keyTag, keyNode, valueNode));
+    } else {
+      _result.push(keyNode);
+    }
+
+    skipSeparationSpace(state, true, nodeIndent);
+
+    ch = state.input.charCodeAt(state.position);
+
+    if (ch === 0x2C/* , */) {
+      readNext = true;
+      ch = state.input.charCodeAt(++state.position);
+    } else {
+      readNext = false;
+    }
+  }
+
+  throwError(state, 'unexpected end of the stream within a flow collection');
+}
+
+function readBlockScalar(state, nodeIndent) {
+  var captureStart,
+      folding,
+      chomping       = CHOMPING_CLIP,
+      didReadContent = false,
+      detectedIndent = false,
+      textIndent     = nodeIndent,
+      emptyLines     = 0,
+      atMoreIndented = false,
+      tmp,
+      ch;
+
+  ch = state.input.charCodeAt(state.position);
+
+  if (ch === 0x7C/* | */) {
+    folding = false;
+  } else if (ch === 0x3E/* > */) {
+    folding = true;
+  } else {
+    return false;
+  }
+
+  state.kind = 'scalar';
+  state.result = '';
+
+  while (ch !== 0) {
+    ch = state.input.charCodeAt(++state.position);
+
+    if (ch === 0x2B/* + */ || ch === 0x2D/* - */) {
+      if (CHOMPING_CLIP === chomping) {
+        chomping = (ch === 0x2B/* + */) ? CHOMPING_KEEP : CHOMPING_STRIP;
+      } else {
+        throwError(state, 'repeat of a chomping mode identifier');
+      }
+
+    } else if ((tmp = fromDecimalCode(ch)) >= 0) {
+      if (tmp === 0) {
+        throwError(state, 'bad explicit indentation width of a block scalar; it cannot be less than one');
+      } else if (!detectedIndent) {
+        textIndent = nodeIndent + tmp - 1;
+        detectedIndent = true;
+      } else {
+        throwError(state, 'repeat of an indentation width identifier');
+      }
+
+    } else {
+      break;
+    }
+  }
+
+  if (is_WHITE_SPACE(ch)) {
+    do { ch = state.input.charCodeAt(++state.position); }
+    while (is_WHITE_SPACE(ch));
+
+    if (ch === 0x23/* # */) {
+      do { ch = state.input.charCodeAt(++state.position); }
+      while (!is_EOL(ch) && (ch !== 0));
+    }
+  }
+
+  while (ch !== 0) {
+    readLineBreak(state);
+    state.lineIndent = 0;
+
+    ch = state.input.charCodeAt(state.position);
+
+    while ((!detectedIndent || state.lineIndent < textIndent) &&
+           (ch === 0x20/* Space */)) {
+      state.lineIndent++;
+      ch = state.input.charCodeAt(++state.position);
+    }
+
+    if (!detectedIndent && state.lineIndent > textIndent) {
+      textIndent = state.lineIndent;
+    }
+
+    if (is_EOL(ch)) {
+      emptyLines++;
+      continue;
+    }
+
+    // End of the scalar.
+    if (state.lineIndent < textIndent) {
+
+      // Perform the chomping.
+      if (chomping === CHOMPING_KEEP) {
+        state.result += common.repeat('\n', didReadContent ? 1 + emptyLines : emptyLines);
+      } else if (chomping === CHOMPING_CLIP) {
+        if (didReadContent) { // i.e. only if the scalar is not empty.
+          state.result += '\n';
+        }
+      }
+
+      // Break this `while` cycle and go to the funciton's epilogue.
+      break;
+    }
+
+    // Folded style: use fancy rules to handle line breaks.
+    if (folding) {
+
+      // Lines starting with white space characters (more-indented lines) are not folded.
+      if (is_WHITE_SPACE(ch)) {
+        atMoreIndented = true;
+        // except for the first content line (cf. Example 8.1)
+        state.result += common.repeat('\n', didReadContent ? 1 + emptyLines : emptyLines);
+
+      // End of more-indented block.
+      } else if (atMoreIndented) {
+        atMoreIndented = false;
+        state.result += common.repeat('\n', emptyLines + 1);
+
+      // Just one line break - perceive as the same line.
+      } else if (emptyLines === 0) {
+        if (didReadContent) { // i.e. only if we have already read some scalar content.
+          state.result += ' ';
+        }
+
+      // Several line breaks - perceive as different lines.
+      } else {
+        state.result += common.repeat('\n', emptyLines);
+      }
+
+    // Literal style: just add exact number of line breaks between content lines.
+    } else {
+      // Keep all line breaks except the header line break.
+      state.result += common.repeat('\n', didReadContent ? 1 + emptyLines : emptyLines);
+    }
+
+    didReadContent = true;
+    detectedIndent = true;
+    emptyLines = 0;
+    captureStart = state.position;
+
+    while (!is_EOL(ch) && (ch !== 0)) {
+      ch = state.input.charCodeAt(++state.position);
+    }
+
+    captureSegment(state, captureStart, state.position, false);
+  }
+
+  return true;
+}
+
+function readBlockSequence(state, nodeIndent) {
+  var _line,
+      _tag      = state.tag,
+      _anchor   = state.anchor,
+      _result   = [],
+      following,
+      detected  = false,
+      ch;
+
+  if (state.anchor !== null) {
+    state.anchorMap[state.anchor] = _result;
+  }
+
+  ch = state.input.charCodeAt(state.position);
+
+  while (ch !== 0) {
+
+    if (ch !== 0x2D/* - */) {
+      break;
+    }
+
+    following = state.input.charCodeAt(state.position + 1);
+
+    if (!is_WS_OR_EOL(following)) {
+      break;
+    }
+
+    detected = true;
+    state.position++;
+
+    if (skipSeparationSpace(state, true, -1)) {
+      if (state.lineIndent <= nodeIndent) {
+        _result.push(null);
+        ch = state.input.charCodeAt(state.position);
+        continue;
+      }
+    }
+
+    _line = state.line;
+    composeNode(state, nodeIndent, CONTEXT_BLOCK_IN, false, true);
+    _result.push(state.result);
+    skipSeparationSpace(state, true, -1);
+
+    ch = state.input.charCodeAt(state.position);
+
+    if ((state.line === _line || state.lineIndent > nodeIndent) && (ch !== 0)) {
+      throwError(state, 'bad indentation of a sequence entry');
+    } else if (state.lineIndent < nodeIndent) {
+      break;
+    }
+  }
+
+  if (detected) {
+    state.tag = _tag;
+    state.anchor = _anchor;
+    state.kind = 'sequence';
+    state.result = _result;
+    return true;
+  }
+  return false;
+}
+
+function readBlockMapping(state, nodeIndent, flowIndent) {
+  var following,
+      allowCompact,
+      _line,
+      _tag          = state.tag,
+      _anchor       = state.anchor,
+      _result       = {},
+      overridableKeys = {},
+      keyTag        = null,
+      keyNode       = null,
+      valueNode     = null,
+      atExplicitKey = false,
+      detected      = false,
+      ch;
+
+  if (state.anchor !== null) {
+    state.anchorMap[state.anchor] = _result;
+  }
+
+  ch = state.input.charCodeAt(state.position);
+
+  while (ch !== 0) {
+    following = state.input.charCodeAt(state.position + 1);
+    _line = state.line; // Save the current line.
+
+    //
+    // Explicit notation case. There are two separate blocks:
+    // first for the key (denoted by "?") and second for the value (denoted by ":")
+    //
+    if ((ch === 0x3F/* ? */ || ch === 0x3A/* : */) && is_WS_OR_EOL(following)) {
+
+      if (ch === 0x3F/* ? */) {
+        if (atExplicitKey) {
+          storeMappingPair(state, _result, overridableKeys, keyTag, keyNode, null);
+          keyTag = keyNode = valueNode = null;
+        }
+
+        detected = true;
+        atExplicitKey = true;
+        allowCompact = true;
+
+      } else if (atExplicitKey) {
+        // i.e. 0x3A/* : */ === character after the explicit key.
+        atExplicitKey = false;
+        allowCompact = true;
+
+      } else {
+        throwError(state, 'incomplete explicit mapping pair; a key node is missed');
+      }
+
+      state.position += 1;
+      ch = following;
+
+    //
+    // Implicit notation case. Flow-style node as the key first, then ":", and the value.
+    //
+    } else if (composeNode(state, flowIndent, CONTEXT_FLOW_OUT, false, true)) {
+
+      if (state.line === _line) {
+        ch = state.input.charCodeAt(state.position);
+
+        while (is_WHITE_SPACE(ch)) {
+          ch = state.input.charCodeAt(++state.position);
+        }
+
+        if (ch === 0x3A/* : */) {
+          ch = state.input.charCodeAt(++state.position);
+
+          if (!is_WS_OR_EOL(ch)) {
+            throwError(state, 'a whitespace character is expected after the key-value separator within a block mapping');
+          }
+
+          if (atExplicitKey) {
+            storeMappingPair(state, _result, overridableKeys, keyTag, keyNode, null);
+            keyTag = keyNode = valueNode = null;
+          }
+
+          detected = true;
+          atExplicitKey = false;
+          allowCompact = false;
+          keyTag = state.tag;
+          keyNode = state.result;
+
+        } else if (detected) {
+          throwError(state, 'can not read an implicit mapping pair; a colon is missed');
+
+        } else {
+          state.tag = _tag;
+          state.anchor = _anchor;
+          return true; // Keep the result of `composeNode`.
+        }
+
+      } else if (detected) {
+        throwError(state, 'can not read a block mapping entry; a multiline key may not be an implicit key');
+
+      } else {
+        state.tag = _tag;
+        state.anchor = _anchor;
+        return true; // Keep the result of `composeNode`.
+      }
+
+    } else {
+      break; // Reading is done. Go to the epilogue.
+    }
+
+    //
+    // Common reading code for both explicit and implicit notations.
+    //
+    if (state.line === _line || state.lineIndent > nodeIndent) {
+      if (composeNode(state, nodeIndent, CONTEXT_BLOCK_OUT, true, allowCompact)) {
+        if (atExplicitKey) {
+          keyNode = state.result;
+        } else {
+          valueNode = state.result;
+        }
+      }
+
+      if (!atExplicitKey) {
+        storeMappingPair(state, _result, overridableKeys, keyTag, keyNode, valueNode);
+        keyTag = keyNode = valueNode = null;
+      }
+
+      skipSeparationSpace(state, true, -1);
+      ch = state.input.charCodeAt(state.position);
+    }
+
+    if (state.lineIndent > nodeIndent && (ch !== 0)) {
+      throwError(state, 'bad indentation of a mapping entry');
+    } else if (state.lineIndent < nodeIndent) {
+      break;
+    }
+  }
+
+  //
+  // Epilogue.
+  //
+
+  // Special case: last mapping's node contains only the key in explicit notation.
+  if (atExplicitKey) {
+    storeMappingPair(state, _result, overridableKeys, keyTag, keyNode, null);
+  }
+
+  // Expose the resulting mapping.
+  if (detected) {
+    state.tag = _tag;
+    state.anchor = _anchor;
+    state.kind = 'mapping';
+    state.result = _result;
+  }
+
+  return detected;
+}
+
+function readTagProperty(state) {
+  var _position,
+      isVerbatim = false,
+      isNamed    = false,
+      tagHandle,
+      tagName,
+      ch;
+
+  ch = state.input.charCodeAt(state.position);
+
+  if (ch !== 0x21/* ! */) return false;
+
+  if (state.tag !== null) {
+    throwError(state, 'duplication of a tag property');
+  }
+
+  ch = state.input.charCodeAt(++state.position);
+
+  if (ch === 0x3C/* < */) {
+    isVerbatim = true;
+    ch = state.input.charCodeAt(++state.position);
+
+  } else if (ch === 0x21/* ! */) {
+    isNamed = true;
+    tagHandle = '!!';
+    ch = state.input.charCodeAt(++state.position);
+
+  } else {
+    tagHandle = '!';
+  }
+
+  _position = state.position;
+
+  if (isVerbatim) {
+    do { ch = state.input.charCodeAt(++state.position); }
+    while (ch !== 0 && ch !== 0x3E/* > */);
+
+    if (state.position < state.length) {
+      tagName = state.input.slice(_position, state.position);
+      ch = state.input.charCodeAt(++state.position);
+    } else {
+      throwError(state, 'unexpected end of the stream within a verbatim tag');
+    }
+  } else {
+    while (ch !== 0 && !is_WS_OR_EOL(ch)) {
+
+      if (ch === 0x21/* ! */) {
+        if (!isNamed) {
+          tagHandle = state.input.slice(_position - 1, state.position + 1);
+
+          if (!PATTERN_TAG_HANDLE.test(tagHandle)) {
+            throwError(state, 'named tag handle cannot contain such characters');
+          }
+
+          isNamed = true;
+          _position = state.position + 1;
+        } else {
+          throwError(state, 'tag suffix cannot contain exclamation marks');
+        }
+      }
+
+      ch = state.input.charCodeAt(++state.position);
+    }
+
+    tagName = state.input.slice(_position, state.position);
+
+    if (PATTERN_FLOW_INDICATORS.test(tagName)) {
+      throwError(state, 'tag suffix cannot contain flow indicator characters');
+    }
+  }
+
+  if (tagName && !PATTERN_TAG_URI.test(tagName)) {
+    throwError(state, 'tag name cannot contain such characters: ' + tagName);
+  }
+
+  if (isVerbatim) {
+    state.tag = tagName;
+
+  } else if (_hasOwnProperty.call(state.tagMap, tagHandle)) {
+    state.tag = state.tagMap[tagHandle] + tagName;
+
+  } else if (tagHandle === '!') {
+    state.tag = '!' + tagName;
+
+  } else if (tagHandle === '!!') {
+    state.tag = 'tag:yaml.org,2002:' + tagName;
+
+  } else {
+    throwError(state, 'undeclared tag handle "' + tagHandle + '"');
+  }
+
+  return true;
+}
+
+function readAnchorProperty(state) {
+  var _position,
+      ch;
+
+  ch = state.input.charCodeAt(state.position);
+
+  if (ch !== 0x26/* & */) return false;
+
+  if (state.anchor !== null) {
+    throwError(state, 'duplication of an anchor property');
+  }
+
+  ch = state.input.charCodeAt(++state.position);
+  _position = state.position;
+
+  while (ch !== 0 && !is_WS_OR_EOL(ch) && !is_FLOW_INDICATOR(ch)) {
+    ch = state.input.charCodeAt(++state.position);
+  }
+
+  if (state.position === _position) {
+    throwError(state, 'name of an anchor node must contain at least one character');
+  }
+
+  state.anchor = state.input.slice(_position, state.position);
+  return true;
+}
+
+function readAlias(state) {
+  var _position, alias,
+      ch;
+
+  ch = state.input.charCodeAt(state.position);
+
+  if (ch !== 0x2A/* * */) return false;
+
+  ch = state.input.charCodeAt(++state.position);
+  _position = state.position;
+
+  while (ch !== 0 && !is_WS_OR_EOL(ch) && !is_FLOW_INDICATOR(ch)) {
+    ch = state.input.charCodeAt(++state.position);
+  }
+
+  if (state.position === _position) {
+    throwError(state, 'name of an alias node must contain at least one character');
+  }
+
+  alias = state.input.slice(_position, state.position);
+
+  if (!state.anchorMap.hasOwnProperty(alias)) {
+    throwError(state, 'unidentified alias "' + alias + '"');
+  }
+
+  state.result = state.anchorMap[alias];
+  skipSeparationSpace(state, true, -1);
+  return true;
+}
+
+function composeNode(state, parentIndent, nodeContext, allowToSeek, allowCompact) {
+  var allowBlockStyles,
+      allowBlockScalars,
+      allowBlockCollections,
+      indentStatus = 1, // 1: this>parent, 0: this=parent, -1: this<parent
+      atNewLine  = false,
+      hasContent = false,
+      typeIndex,
+      typeQuantity,
+      type,
+      flowIndent,
+      blockIndent;
+
+  if (state.listener !== null) {
+    state.listener('open', state);
+  }
+
+  state.tag    = null;
+  state.anchor = null;
+  state.kind   = null;
+  state.result = null;
+
+  allowBlockStyles = allowBlockScalars = allowBlockCollections =
+    CONTEXT_BLOCK_OUT === nodeContext ||
+    CONTEXT_BLOCK_IN  === nodeContext;
+
+  if (allowToSeek) {
+    if (skipSeparationSpace(state, true, -1)) {
+      atNewLine = true;
+
+      if (state.lineIndent > parentIndent) {
+        indentStatus = 1;
+      } else if (state.lineIndent === parentIndent) {
+        indentStatus = 0;
+      } else if (state.lineIndent < parentIndent) {
+        indentStatus = -1;
+      }
+    }
+  }
+
+  if (indentStatus === 1) {
+    while (readTagProperty(state) || readAnchorProperty(state)) {
+      if (skipSeparationSpace(state, true, -1)) {
+        atNewLine = true;
+        allowBlockCollections = allowBlockStyles;
+
+        if (state.lineIndent > parentIndent) {
+          indentStatus = 1;
+        } else if (state.lineIndent === parentIndent) {
+          indentStatus = 0;
+        } else if (state.lineIndent < parentIndent) {
+          indentStatus = -1;
+        }
+      } else {
+        allowBlockCollections = false;
+      }
+    }
+  }
+
+  if (allowBlockCollections) {
+    allowBlockCollections = atNewLine || allowCompact;
+  }
+
+  if (indentStatus === 1 || CONTEXT_BLOCK_OUT === nodeContext) {
+    if (CONTEXT_FLOW_IN === nodeContext || CONTEXT_FLOW_OUT === nodeContext) {
+      flowIndent = parentIndent;
+    } else {
+      flowIndent = parentIndent + 1;
+    }
+
+    blockIndent = state.position - state.lineStart;
+
+    if (indentStatus === 1) {
+      if (allowBlockCollections &&
+          (readBlockSequence(state, blockIndent) ||
+           readBlockMapping(state, blockIndent, flowIndent)) ||
+          readFlowCollection(state, flowIndent)) {
+        hasContent = true;
+      } else {
+        if ((allowBlockScalars && readBlockScalar(state, flowIndent)) ||
+            readSingleQuotedScalar(state, flowIndent) ||
+            readDoubleQuotedScalar(state, flowIndent)) {
+          hasContent = true;
+
+        } else if (readAlias(state)) {
+          hasContent = true;
+
+          if (state.tag !== null || state.anchor !== null) {
+            throwError(state, 'alias node should not have any properties');
+          }
+
+        } else if (readPlainScalar(state, flowIndent, CONTEXT_FLOW_IN === nodeContext)) {
+          hasContent = true;
+
+          if (state.tag === null) {
+            state.tag = '?';
+          }
+        }
+
+        if (state.anchor !== null) {
+          state.anchorMap[state.anchor] = state.result;
+        }
+      }
+    } else if (indentStatus === 0) {
+      // Special case: block sequences are allowed to have same indentation level as the parent.
+      // http://www.yaml.org/spec/1.2/spec.html#id2799784
+      hasContent = allowBlockCollections && readBlockSequence(state, blockIndent);
+    }
+  }
+
+  if (state.tag !== null && state.tag !== '!') {
+    if (state.tag === '?') {
+      for (typeIndex = 0, typeQuantity = state.implicitTypes.length;
+           typeIndex < typeQuantity;
+           typeIndex += 1) {
+        type = state.implicitTypes[typeIndex];
+
+        // Implicit resolving is not allowed for non-scalar types, and '?'
+        // non-specific tag is only assigned to plain scalars. So, it isn't
+        // needed to check for 'kind' conformity.
+
+        if (type.resolve(state.result)) { // `state.result` updated in resolver if matched
+          state.result = type.construct(state.result);
+          state.tag = type.tag;
+          if (state.anchor !== null) {
+            state.anchorMap[state.anchor] = state.result;
+          }
+          break;
+        }
+      }
+    } else if (_hasOwnProperty.call(state.typeMap, state.tag)) {
+      type = state.typeMap[state.tag];
+
+      if (state.result !== null && type.kind !== state.kind) {
+        throwError(state, 'unacceptable node kind for !<' + state.tag + '> tag; it should be "' + type.kind + '", not "' + state.kind + '"');
+      }
+
+      if (!type.resolve(state.result)) { // `state.result` updated in resolver if matched
+        throwError(state, 'cannot resolve a node with !<' + state.tag + '> explicit tag');
+      } else {
+        state.result = type.construct(state.result);
+        if (state.anchor !== null) {
+          state.anchorMap[state.anchor] = state.result;
+        }
+      }
+    } else {
+      throwError(state, 'unknown tag !<' + state.tag + '>');
+    }
+  }
+
+  if (state.listener !== null) {
+    state.listener('close', state);
+  }
+  return state.tag !== null ||  state.anchor !== null || hasContent;
+}
+
+function readDocument(state) {
+  var documentStart = state.position,
+      _position,
+      directiveName,
+      directiveArgs,
+      hasDirectives = false,
+      ch;
+
+  state.version = null;
+  state.checkLineBreaks = state.legacy;
+  state.tagMap = {};
+  state.anchorMap = {};
+
+  while ((ch = state.input.charCodeAt(state.position)) !== 0) {
+    skipSeparationSpace(state, true, -1);
+
+    ch = state.input.charCodeAt(state.position);
+
+    if (state.lineIndent > 0 || ch !== 0x25/* % */) {
+      break;
+    }
+
+    hasDirectives = true;
+    ch = state.input.charCodeAt(++state.position);
+    _position = state.position;
+
+    while (ch !== 0 && !is_WS_OR_EOL(ch)) {
+      ch = state.input.charCodeAt(++state.position);
+    }
+
+    directiveName = state.input.slice(_position, state.position);
+    directiveArgs = [];
+
+    if (directiveName.length < 1) {
+      throwError(state, 'directive name must not be less than one character in length');
+    }
+
+    while (ch !== 0) {
+      while (is_WHITE_SPACE(ch)) {
+        ch = state.input.charCodeAt(++state.position);
+      }
+
+      if (ch === 0x23/* # */) {
+        do { ch = state.input.charCodeAt(++state.position); }
+        while (ch !== 0 && !is_EOL(ch));
+        break;
+      }
+
+      if (is_EOL(ch)) break;
+
+      _position = state.position;
+
+      while (ch !== 0 && !is_WS_OR_EOL(ch)) {
+        ch = state.input.charCodeAt(++state.position);
+      }
+
+      directiveArgs.push(state.input.slice(_position, state.position));
+    }
+
+    if (ch !== 0) readLineBreak(state);
+
+    if (_hasOwnProperty.call(directiveHandlers, directiveName)) {
+      directiveHandlers[directiveName](state, directiveName, directiveArgs);
+    } else {
+      throwWarning(state, 'unknown document directive "' + directiveName + '"');
+    }
+  }
+
+  skipSeparationSpace(state, true, -1);
+
+  if (state.lineIndent === 0 &&
+      state.input.charCodeAt(state.position)     === 0x2D/* - */ &&
+      state.input.charCodeAt(state.position + 1) === 0x2D/* - */ &&
+      state.input.charCodeAt(state.position + 2) === 0x2D/* - */) {
+    state.position += 3;
+    skipSeparationSpace(state, true, -1);
+
+  } else if (hasDirectives) {
+    throwError(state, 'directives end mark is expected');
+  }
+
+  composeNode(state, state.lineIndent - 1, CONTEXT_BLOCK_OUT, false, true);
+  skipSeparationSpace(state, true, -1);
+
+  if (state.checkLineBreaks &&
+      PATTERN_NON_ASCII_LINE_BREAKS.test(state.input.slice(documentStart, state.position))) {
+    throwWarning(state, 'non-ASCII line breaks are interpreted as content');
+  }
+
+  state.documents.push(state.result);
+
+  if (state.position === state.lineStart && testDocumentSeparator(state)) {
+
+    if (state.input.charCodeAt(state.position) === 0x2E/* . */) {
+      state.position += 3;
+      skipSeparationSpace(state, true, -1);
+    }
+    return;
+  }
+
+  if (state.position < (state.length - 1)) {
+    throwError(state, 'end of the stream or a document separator is expected');
+  } else {
+    return;
+  }
+}
+
+
+function loadDocuments(input, options) {
+  input = String(input);
+  options = options || {};
+
+  if (input.length !== 0) {
+
+    // Add tailing `\n` if not exists
+    if (input.charCodeAt(input.length - 1) !== 0x0A/* LF */ &&
+        input.charCodeAt(input.length - 1) !== 0x0D/* CR */) {
+      input += '\n';
+    }
+
+    // Strip BOM
+    if (input.charCodeAt(0) === 0xFEFF) {
+      input = input.slice(1);
+    }
+  }
+
+  var state = new State(input, options);
+
+  // Use 0 as string terminator. That significantly simplifies bounds check.
+  state.input += '\0';
+
+  while (state.input.charCodeAt(state.position) === 0x20/* Space */) {
+    state.lineIndent += 1;
+    state.position += 1;
+  }
+
+  while (state.position < (state.length - 1)) {
+    readDocument(state);
+  }
+
+  return state.documents;
+}
+
+
+function loadAll(input, iterator, options) {
+  var documents = loadDocuments(input, options), index, length;
+
+  for (index = 0, length = documents.length; index < length; index += 1) {
+    iterator(documents[index]);
+  }
+}
+
+
+function load(input, options) {
+  var documents = loadDocuments(input, options);
+
+  if (documents.length === 0) {
+    /*eslint-disable no-undefined*/
+    return undefined;
+  } else if (documents.length === 1) {
+    return documents[0];
+  }
+  throw new YAMLException('expected a single document in the stream, but found more');
+}
+
+
+function safeLoadAll(input, output, options) {
+  loadAll(input, output, common.extend({ schema: DEFAULT_SAFE_SCHEMA }, options));
+}
+
+
+function safeLoad(input, options) {
+  return load(input, common.extend({ schema: DEFAULT_SAFE_SCHEMA }, options));
+}
+
+
+module.exports.loadAll     = loadAll;
+module.exports.load        = load;
+module.exports.safeLoadAll = safeLoadAll;
+module.exports.safeLoad    = safeLoad;
diff --git a/tools/doc/node_modules/js-yaml/lib/js-yaml/mark.js b/tools/doc/node_modules/js-yaml/lib/js-yaml/mark.js
new file mode 100644
index 00000000000000..47b265c20cea4c
--- /dev/null
+++ b/tools/doc/node_modules/js-yaml/lib/js-yaml/mark.js
@@ -0,0 +1,76 @@
+'use strict';
+
+
+var common = require('./common');
+
+
+function Mark(name, buffer, position, line, column) {
+  this.name     = name;
+  this.buffer   = buffer;
+  this.position = position;
+  this.line     = line;
+  this.column   = column;
+}
+
+
+Mark.prototype.getSnippet = function getSnippet(indent, maxLength) {
+  var head, start, tail, end, snippet;
+
+  if (!this.buffer) return null;
+
+  indent = indent || 4;
+  maxLength = maxLength || 75;
+
+  head = '';
+  start = this.position;
+
+  while (start > 0 && '\x00\r\n\x85\u2028\u2029'.indexOf(this.buffer.charAt(start - 1)) === -1) {
+    start -= 1;
+    if (this.position - start > (maxLength / 2 - 1)) {
+      head = ' ... ';
+      start += 5;
+      break;
+    }
+  }
+
+  tail = '';
+  end = this.position;
+
+  while (end < this.buffer.length && '\x00\r\n\x85\u2028\u2029'.indexOf(this.buffer.charAt(end)) === -1) {
+    end += 1;
+    if (end - this.position > (maxLength / 2 - 1)) {
+      tail = ' ... ';
+      end -= 5;
+      break;
+    }
+  }
+
+  snippet = this.buffer.slice(start, end);
+
+  return common.repeat(' ', indent) + head + snippet + tail + '\n' +
+         common.repeat(' ', indent + this.position - start + head.length) + '^';
+};
+
+
+Mark.prototype.toString = function toString(compact) {
+  var snippet, where = '';
+
+  if (this.name) {
+    where += 'in "' + this.name + '" ';
+  }
+
+  where += 'at line ' + (this.line + 1) + ', column ' + (this.column + 1);
+
+  if (!compact) {
+    snippet = this.getSnippet();
+
+    if (snippet) {
+      where += ':\n' + snippet;
+    }
+  }
+
+  return where;
+};
+
+
+module.exports = Mark;
diff --git a/tools/doc/node_modules/js-yaml/lib/js-yaml/schema.js b/tools/doc/node_modules/js-yaml/lib/js-yaml/schema.js
new file mode 100644
index 00000000000000..32803ff14c51ad
--- /dev/null
+++ b/tools/doc/node_modules/js-yaml/lib/js-yaml/schema.js
@@ -0,0 +1,104 @@
+'use strict';
+
+/*eslint-disable max-len*/
+
+var common        = require('./common');
+var YAMLException = require('./exception');
+var Type          = require('./type');
+
+
+function compileList(schema, name, result) {
+  var exclude = [];
+
+  schema.include.forEach(function (includedSchema) {
+    result = compileList(includedSchema, name, result);
+  });
+
+  schema[name].forEach(function (currentType) {
+    result.forEach(function (previousType, previousIndex) {
+      if (previousType.tag === currentType.tag) {
+        exclude.push(previousIndex);
+      }
+    });
+
+    result.push(currentType);
+  });
+
+  return result.filter(function (type, index) {
+    return exclude.indexOf(index) === -1;
+  });
+}
+
+
+function compileMap(/* lists... */) {
+  var result = {}, index, length;
+
+  function collectType(type) {
+    result[type.tag] = type;
+  }
+
+  for (index = 0, length = arguments.length; index < length; index += 1) {
+    arguments[index].forEach(collectType);
+  }
+
+  return result;
+}
+
+
+function Schema(definition) {
+  this.include  = definition.include  || [];
+  this.implicit = definition.implicit || [];
+  this.explicit = definition.explicit || [];
+
+  this.implicit.forEach(function (type) {
+    if (type.loadKind && type.loadKind !== 'scalar') {
+      throw new YAMLException('There is a non-scalar type in the implicit list of a schema. Implicit resolving of such types is not supported.');
+    }
+  });
+
+  this.compiledImplicit = compileList(this, 'implicit', []);
+  this.compiledExplicit = compileList(this, 'explicit', []);
+  this.compiledTypeMap  = compileMap(this.compiledImplicit, this.compiledExplicit);
+}
+
+
+Schema.DEFAULT = null;
+
+
+Schema.create = function createSchema() {
+  var schemas, types;
+
+  switch (arguments.length) {
+    case 1:
+      schemas = Schema.DEFAULT;
+      types = arguments[0];
+      break;
+
+    case 2:
+      schemas = arguments[0];
+      types = arguments[1];
+      break;
+
+    default:
+      throw new YAMLException('Wrong number of arguments for Schema.create function');
+  }
+
+  schemas = common.toArray(schemas);
+  types = common.toArray(types);
+
+  if (!schemas.every(function (schema) { return schema instanceof Schema; })) {
+    throw new YAMLException('Specified list of super schemas (or a single Schema object) contains a non-Schema object.');
+  }
+
+  if (!types.every(function (type) { return type instanceof Type; })) {
+    throw new YAMLException('Specified list of YAML types (or a single Type object) contains a non-Type object.');
+  }
+
+  return new Schema({
+    include: schemas,
+    explicit: types
+  });
+};
+
+
+module.exports = Schema;
diff --git a/tools/doc/node_modules/js-yaml/lib/js-yaml/schema/core.js b/tools/doc/node_modules/js-yaml/lib/js-yaml/schema/core.js
new file mode 100644
index 00000000000000..206daab56c0586
--- /dev/null
+++ b/tools/doc/node_modules/js-yaml/lib/js-yaml/schema/core.js
@@ -0,0 +1,18 @@
+// Standard YAML's Core schema.
+// http://www.yaml.org/spec/1.2/spec.html#id2804923
+//
+// NOTE: JS-YAML does not support schema-specific tag resolution restrictions.
+// So, Core schema has no distinctions from JSON schema is JS-YAML.
+
+
+'use strict';
+
+
+var Schema = require('../schema');
+
+
+module.exports = new Schema({
+  include: [
+    require('./json')
+  ]
+});
diff --git a/tools/doc/node_modules/js-yaml/lib/js-yaml/schema/default_full.js b/tools/doc/node_modules/js-yaml/lib/js-yaml/schema/default_full.js
new file mode 100644
index 00000000000000..a55ef42accdaf9
--- /dev/null
+++ b/tools/doc/node_modules/js-yaml/lib/js-yaml/schema/default_full.js
@@ -0,0 +1,25 @@
+// JS-YAML's default schema for `load` function.
+// It is not described in the YAML specification.
+//
+// This schema is based on JS-YAML's default safe schema and includes
+// JavaScript-specific types: !!js/undefined, !!js/regexp and !!js/function.
+//
+// Also this schema is used as default base schema at `Schema.create` function.
+
+
+'use strict';
+
+
+var Schema = require('../schema');
+
+
+module.exports = Schema.DEFAULT = new Schema({
+  include: [
+    require('./default_safe')
+  ],
+  explicit: [
+    require('../type/js/undefined'),
+    require('../type/js/regexp'),
+    require('../type/js/function')
+  ]
+});
diff --git a/tools/doc/node_modules/js-yaml/lib/js-yaml/schema/default_safe.js b/tools/doc/node_modules/js-yaml/lib/js-yaml/schema/default_safe.js
new file mode 100644
index 00000000000000..11d89bbfbba45e
--- /dev/null
+++ b/tools/doc/node_modules/js-yaml/lib/js-yaml/schema/default_safe.js
@@ -0,0 +1,28 @@
+// JS-YAML's default schema for `safeLoad` function.
+// It is not described in the YAML specification.
+//
+// This schema is based on standard YAML's Core schema and includes most of
+// extra types described at YAML tag repository. (http://yaml.org/type/)
+
+
+'use strict';
+
+
+var Schema = require('../schema');
+
+
+module.exports = new Schema({
+  include: [
+    require('./core')
+  ],
+  implicit: [
+    require('../type/timestamp'),
+    require('../type/merge')
+  ],
+  explicit: [
+    require('../type/binary'),
+    require('../type/omap'),
+    require('../type/pairs'),
+    require('../type/set')
+  ]
+});
diff --git a/tools/doc/node_modules/js-yaml/lib/js-yaml/schema/failsafe.js b/tools/doc/node_modules/js-yaml/lib/js-yaml/schema/failsafe.js
new file mode 100644
index 00000000000000..b7a33eb7a1ccea
--- /dev/null
+++ b/tools/doc/node_modules/js-yaml/lib/js-yaml/schema/failsafe.js
@@ -0,0 +1,17 @@
+// Standard YAML's Failsafe schema.
+// http://www.yaml.org/spec/1.2/spec.html#id2802346
+
+
+'use strict';
+
+
+var Schema = require('../schema');
+
+
+module.exports = new Schema({
+  explicit: [
+    require('../type/str'),
+    require('../type/seq'),
+    require('../type/map')
+  ]
+});
diff --git a/tools/doc/node_modules/js-yaml/lib/js-yaml/schema/json.js b/tools/doc/node_modules/js-yaml/lib/js-yaml/schema/json.js
new file mode 100644
index 00000000000000..5be3dbf805bc5d
--- /dev/null
+++ b/tools/doc/node_modules/js-yaml/lib/js-yaml/schema/json.js
@@ -0,0 +1,25 @@
+// Standard YAML's JSON schema.
+// http://www.yaml.org/spec/1.2/spec.html#id2803231
+//
+// NOTE: JS-YAML does not support schema-specific tag resolution restrictions.
+// So, this schema is not such strict as defined in the YAML specification.
+// It allows numbers in binary notaion, use `Null` and `NULL` as `null`, etc.
+
+
+'use strict';
+
+
+var Schema = require('../schema');
+
+
+module.exports = new Schema({
+  include: [
+    require('./failsafe')
+  ],
+  implicit: [
+    require('../type/null'),
+    require('../type/bool'),
+    require('../type/int'),
+    require('../type/float')
+  ]
+});
diff --git a/tools/doc/node_modules/js-yaml/lib/js-yaml/type.js b/tools/doc/node_modules/js-yaml/lib/js-yaml/type.js
new file mode 100644
index 00000000000000..90b702ac06f11b
--- /dev/null
+++ b/tools/doc/node_modules/js-yaml/lib/js-yaml/type.js
@@ -0,0 +1,61 @@
+'use strict';
+
+var YAMLException = require('./exception');
+
+var TYPE_CONSTRUCTOR_OPTIONS = [
+  'kind',
+  'resolve',
+  'construct',
+  'instanceOf',
+  'predicate',
+  'represent',
+  'defaultStyle',
+  'styleAliases'
+];
+
+var YAML_NODE_KINDS = [
+  'scalar',
+  'sequence',
+  'mapping'
+];
+
+function compileStyleAliases(map) {
+  var result = {};
+
+  if (map !== null) {
+    Object.keys(map).forEach(function (style) {
+      map[style].forEach(function (alias) {
+        result[String(alias)] = style;
+      });
+    });
+  }
+
+  return result;
+}
+
+function Type(tag, options) {
+  options = options || {};
+
+  Object.keys(options).forEach(function (name) {
+    if (TYPE_CONSTRUCTOR_OPTIONS.indexOf(name) === -1) {
+      throw new YAMLException('Unknown option "' + name + '" is met in definition of "' + tag + '" YAML type.');
+    }
+  });
+
+  // TODO: Add tag format check.
+  this.tag          = tag;
+  this.kind         = options['kind']         || null;
+  this.resolve      = options['resolve']      || function () { return true; };
+  this.construct    = options['construct']    || function (data) { return data; };
+  this.instanceOf   = options['instanceOf']   || null;
+  this.predicate    = options['predicate']    || null;
+  this.represent    = options['represent']    || null;
+  this.defaultStyle = options['defaultStyle'] || null;
+  this.styleAliases = compileStyleAliases(options['styleAliases'] || null);
+
+  if (YAML_NODE_KINDS.indexOf(this.kind) === -1) {
+    throw new YAMLException('Unknown kind "' + this.kind + '" is specified for "' + tag + '" YAML type.');
+  }
+}
+
+module.exports = Type;
diff --git a/tools/doc/node_modules/js-yaml/lib/js-yaml/type/binary.js b/tools/doc/node_modules/js-yaml/lib/js-yaml/type/binary.js
new file mode 100644
index 00000000000000..205629f744cf20
--- /dev/null
+++ b/tools/doc/node_modules/js-yaml/lib/js-yaml/type/binary.js
@@ -0,0 +1,135 @@
+'use strict';
+
+/*eslint-disable no-bitwise*/
+
+var NodeBuffer;
+
+try {
+  // A trick for browserified version, to not include `Buffer` shim
+  var _require = require;
+  NodeBuffer = _require('buffer').Buffer;
+} catch (__) {}
+
+var Type       = require('../type');
+
+
+// [ 64, 65, 66 ] -> [ padding, CR, LF ]
+var BASE64_MAP = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=\n\r';
+
+
+function resolveYamlBinary(data) {
+  if (data === null) return false;
+
+  var code, idx, bitlen = 0, max = data.length, map = BASE64_MAP;
+
+  // Convert one by one.
+  for (idx = 0; idx < max; idx++) {
+    code = map.indexOf(data.charAt(idx));
+
+    // Skip CR/LF
+    if (code > 64) continue;
+
+    // Fail on illegal characters
+    if (code < 0) return false;
+
+    bitlen += 6;
+  }
+
+  // If there are any bits left, source was corrupted
+  return (bitlen % 8) === 0;
+}
+
+function constructYamlBinary(data) {
+  var idx, tailbits,
+      input = data.replace(/[\r\n=]/g, ''), // remove CR/LF & padding to simplify scan
+      max = input.length,
+      map = BASE64_MAP,
+      bits = 0,
+      result = [];
+
+  // Collect by 6*4 bits (3 bytes)
+
+  for (idx = 0; idx < max; idx++) {
+    if ((idx % 4 === 0) && idx) {
+      result.push((bits >> 16) & 0xFF);
+      result.push((bits >> 8) & 0xFF);
+      result.push(bits & 0xFF);
+    }
+
+    bits = (bits << 6) | map.indexOf(input.charAt(idx));
+  }
+
+  // Dump tail
+
+  tailbits = (max % 4) * 6;
+
+  if (tailbits === 0) {
+    result.push((bits >> 16) & 0xFF);
+    result.push((bits >> 8) & 0xFF);
+    result.push(bits & 0xFF);
+  } else if (tailbits === 18) {
+    result.push((bits >> 10) & 0xFF);
+    result.push((bits >> 2) & 0xFF);
+  } else if (tailbits === 12) {
+    result.push((bits >> 4) & 0xFF);
+  }
+
+  // Wrap into Buffer for NodeJS and leave Array for browser
+  if (NodeBuffer) return new NodeBuffer(result);
+
+  return result;
+}
+
+function representYamlBinary(object /*, style*/) {
+  var result = '', bits = 0, idx, tail,
+      max = object.length,
+      map = BASE64_MAP;
+
+  // Convert every three bytes to 4 ASCII characters.
+
+  for (idx = 0; idx < max; idx++) {
+    if ((idx % 3 === 0) && idx) {
+      result += map[(bits >> 18) & 0x3F];
+      result += map[(bits >> 12) & 0x3F];
+      result += map[(bits >> 6) & 0x3F];
+      result += map[bits & 0x3F];
+    }
+
+    bits = (bits << 8) + object[idx];
+  }
+
+  // Dump tail
+
+  tail = max % 3;
+
+  if (tail === 0) {
+    result += map[(bits >> 18) & 0x3F];
+    result += map[(bits >> 12) & 0x3F];
+    result += map[(bits >> 6) & 0x3F];
+    result += map[bits & 0x3F];
+  } else if (tail === 2) {
+    result += map[(bits >> 10) & 0x3F];
+    result += map[(bits >> 4) & 0x3F];
+    result += map[(bits << 2) & 0x3F];
+    result += map[64];
+  } else if (tail === 1) {
+    result += map[(bits >> 2) & 0x3F];
+    result += map[(bits << 4) & 0x3F];
+    result += map[64];
+    result += map[64];
+  }
+
+  return result;
+}
+
+function isBinary(object) {
+  return NodeBuffer && NodeBuffer.isBuffer(object);
+}
+
+module.exports = new Type('tag:yaml.org,2002:binary', {
+  kind: 'scalar',
+  resolve: resolveYamlBinary,
+  construct: constructYamlBinary,
+  predicate: isBinary,
+  represent: representYamlBinary
+});
diff --git a/tools/doc/node_modules/js-yaml/lib/js-yaml/type/bool.js b/tools/doc/node_modules/js-yaml/lib/js-yaml/type/bool.js
new file mode 100644
index 00000000000000..cb7745930a6e7f
--- /dev/null
+++ b/tools/doc/node_modules/js-yaml/lib/js-yaml/type/bool.js
@@ -0,0 +1,35 @@
+'use strict';
+
+var Type = require('../type');
+
+function resolveYamlBoolean(data) {
+  if (data === null) return false;
+
+  var max = data.length;
+
+  return (max === 4 && (data === 'true' || data === 'True' || data === 'TRUE')) ||
+         (max === 5 && (data === 'false' || data === 'False' || data === 'FALSE'));
+}
+
+function constructYamlBoolean(data) {
+  return data === 'true' ||
+         data === 'True' ||
+         data === 'TRUE';
+}
+
+function isBoolean(object) {
+  return Object.prototype.toString.call(object) === '[object Boolean]';
+}
+
+module.exports = new Type('tag:yaml.org,2002:bool', {
+  kind: 'scalar',
+  resolve: resolveYamlBoolean,
+  construct: constructYamlBoolean,
+  predicate: isBoolean,
+  represent: {
+    lowercase: function (object) { return object ? 'true' : 'false'; },
+    uppercase: function (object) { return object ? 'TRUE' : 'FALSE'; },
+    camelcase: function (object) { return object ? 'True' : 'False'; }
+  },
+  defaultStyle: 'lowercase'
+});
diff --git a/tools/doc/node_modules/js-yaml/lib/js-yaml/type/float.js b/tools/doc/node_modules/js-yaml/lib/js-yaml/type/float.js
new file mode 100644
index 00000000000000..76871547c2d5b3
--- /dev/null
+++ b/tools/doc/node_modules/js-yaml/lib/js-yaml/type/float.js
@@ -0,0 +1,105 @@
+'use strict';
+
+var common = require('../common');
+var Type   = require('../type');
+
+var YAML_FLOAT_PATTERN = new RegExp(
+  '^(?:[-+]?(?:[0-9][0-9_]*)\\.[0-9_]*(?:[eE][-+][0-9]+)?' +
+  '|\\.[0-9_]+(?:[eE][-+][0-9]+)?' +
+  '|[-+]?[0-9][0-9_]*(?::[0-5]?[0-9])+\\.[0-9_]*' +
+  '|[-+]?\\.(?:inf|Inf|INF)' +
+  '|\\.(?:nan|NaN|NAN))$');
+
+function resolveYamlFloat(data) {
+  if (data === null) return false;
+
+  if (!YAML_FLOAT_PATTERN.test(data)) return false;
+
+  return true;
+}
+
+function constructYamlFloat(data) {
+  var value, sign, base, digits;
+
+  value  = data.replace(/_/g, '').toLowerCase();
+  sign   = value[0] === '-' ? -1 : 1;
+  digits = [];
+
+  if ('+-'.indexOf(value[0]) >= 0) {
+    value = value.slice(1);
+  }
+
+  if (value === '.inf') {
+    return (sign === 1) ? Number.POSITIVE_INFINITY : Number.NEGATIVE_INFINITY;
+
+  } else if (value === '.nan') {
+    return NaN;
+
+  } else if (value.indexOf(':') >= 0) {
+    value.split(':').forEach(function (v) {
+      digits.unshift(parseFloat(v, 10));
+    });
+
+    value = 0.0;
+    base = 1;
+
+    digits.forEach(function (d) {
+      value += d * base;
+      base *= 60;
+    });
+
+    return sign * value;
+
+  }
+  return sign * parseFloat(value, 10);
+}
+
+
+var SCIENTIFIC_WITHOUT_DOT = /^[-+]?[0-9]+e/;
+
+function representYamlFloat(object, style) {
+  var res;
+
+  if (isNaN(object)) {
+    switch (style) {
+      case 'lowercase': return '.nan';
+      case 'uppercase': return '.NAN';
+      case 'camelcase': return '.NaN';
+    }
+  } else if (Number.POSITIVE_INFINITY === object) {
+    switch (style) {
+      case 'lowercase': return '.inf';
+      case 'uppercase': return '.INF';
+      case 'camelcase': return '.Inf';
+    }
+  } else if (Number.NEGATIVE_INFINITY === object) {
+    switch (style) {
+      case 'lowercase': return '-.inf';
+      case 'uppercase': return '-.INF';
+      case 'camelcase': return '-.Inf';
+    }
+  } else if (common.isNegativeZero(object)) {
+    return '-0.0';
+  }
+
+  res = object.toString(10);
+
+  // JS stringifier can build scientific format without dots: 5e-100,
+  // while YAML requres dot: 5.e-100. Fix it with simple hack
+
+  return SCIENTIFIC_WITHOUT_DOT.test(res) ? res.replace('e', '.e') : res;
+}
+
+function isFloat(object) {
+  return (Object.prototype.toString.call(object) === '[object Number]') &&
+         (object % 1 !== 0 || common.isNegativeZero(object));
+}
+
+module.exports = new Type('tag:yaml.org,2002:float', {
+  kind: 'scalar',
+  resolve: resolveYamlFloat,
+  construct: constructYamlFloat,
+  predicate: isFloat,
+  represent: representYamlFloat,
+  defaultStyle: 'lowercase'
+});
diff --git a/tools/doc/node_modules/js-yaml/lib/js-yaml/type/int.js b/tools/doc/node_modules/js-yaml/lib/js-yaml/type/int.js
new file mode 100644
index 00000000000000..a3c496503d6bbc
--- /dev/null
+++ b/tools/doc/node_modules/js-yaml/lib/js-yaml/type/int.js
@@ -0,0 +1,168 @@
+'use strict';
+
+var common = require('../common');
+var Type   = require('../type');
+
+function isHexCode(c) {
+  return ((0x30/* 0 */ <= c) && (c <= 0x39/* 9 */)) ||
+         ((0x41/* A */ <= c) && (c <= 0x46/* F */)) ||
+         ((0x61/* a */ <= c) && (c <= 0x66/* f */));
+}
+
+function isOctCode(c) {
+  return ((0x30/* 0 */ <= c) && (c <= 0x37/* 7 */));
+}
+
+function isDecCode(c) {
+  return ((0x30/* 0 */ <= c) && (c <= 0x39/* 9 */));
+}
+
+function resolveYamlInteger(data) {
+  if (data === null) return false;
+
+  var max = data.length,
+      index = 0,
+      hasDigits = false,
+      ch;
+
+  if (!max) return false;
+
+  ch = data[index];
+
+  // sign
+  if (ch === '-' || ch === '+') {
+    ch = data[++index];
+  }
+
+  if (ch === '0') {
+    // 0
+    if (index + 1 === max) return true;
+    ch = data[++index];
+
+    // base 2, base 8, base 16
+
+    if (ch === 'b') {
+      // base 2
+      index++;
+
+      for (; index < max; index++) {
+        ch = data[index];
+        if (ch === '_') continue;
+        if (ch !== '0' && ch !== '1') return false;
+        hasDigits = true;
+      }
+      return hasDigits;
+    }
+
+
+    if (ch === 'x') {
+      // base 16
+      index++;
+
+      for (; index < max; index++) {
+        ch = data[index];
+        if (ch === '_') continue;
+        if (!isHexCode(data.charCodeAt(index))) return false;
+        hasDigits = true;
+      }
+      return hasDigits;
+    }
+
+    // base 8
+    for (; index < max; index++) {
+      ch = data[index];
+      if (ch === '_') continue;
+      if (!isOctCode(data.charCodeAt(index))) return false;
+      hasDigits = true;
+    }
+    return hasDigits;
+  }
+
+  // base 10 (except 0) or base 60
+
+  for (; index < max; index++) {
+    ch = data[index];
+    if (ch === '_') continue;
+    if (ch === ':') break;
+    if (!isDecCode(data.charCodeAt(index))) {
+      return false;
+    }
+    hasDigits = true;
+  }
+
+  if (!hasDigits) return false;
+
+  // if !base60 - done;
+  if (ch !== ':') return true;
+
+  // base60 almost not used, no needs to optimize
+  return /^(:[0-5]?[0-9])+$/.test(data.slice(index));
+}
+
+function constructYamlInteger(data) {
+  var value = data, sign = 1, ch, base, digits = [];
+
+  if (value.indexOf('_') !== -1) {
+    value = value.replace(/_/g, '');
+  }
+
+  ch = value[0];
+
+  if (ch === '-' || ch === '+') {
+    if (ch === '-') sign = -1;
+    value = value.slice(1);
+    ch = value[0];
+  }
+
+  if (value === '0') return 0;
+
+  if (ch === '0') {
+    if (value[1] === 'b') return sign * parseInt(value.slice(2), 2);
+    if (value[1] === 'x') return sign * parseInt(value, 16);
+    return sign * parseInt(value, 8);
+  }
+
+  if (value.indexOf(':') !== -1) {
+    value.split(':').forEach(function (v) {
+      digits.unshift(parseInt(v, 10));
+    });
+
+    value = 0;
+    base = 1;
+
+    digits.forEach(function (d) {
+      value += (d * base);
+      base *= 60;
+    });
+
+    return sign * value;
+
+  }
+
+  return sign * parseInt(value, 10);
+}
+
+function isInteger(object) {
+  return (Object.prototype.toString.call(object)) === '[object Number]' &&
+         (object % 1 === 0 && !common.isNegativeZero(object));
+}
+
+module.exports = new Type('tag:yaml.org,2002:int', {
+  kind: 'scalar',
+  resolve: resolveYamlInteger,
+  construct: constructYamlInteger,
+  predicate: isInteger,
+  represent: {
+    binary:      function (object) { return '0b' + object.toString(2); },
+    octal:       function (object) { return '0'  + object.toString(8); },
+    decimal:     function (object) { return        object.toString(10); },
+    hexadecimal: function (object) { return '0x' + object.toString(16).toUpperCase(); }
+  },
+  defaultStyle: 'decimal',
+  styleAliases: {
+    binary:      [ 2,  'bin' ],
+    octal:       [ 8,  'oct' ],
+    decimal:     [ 10, 'dec' ],
+    hexadecimal: [ 16, 'hex' ]
+  }
+});
diff --git a/tools/doc/node_modules/js-yaml/lib/js-yaml/type/js/function.js b/tools/doc/node_modules/js-yaml/lib/js-yaml/type/js/function.js
new file mode 100644
index 00000000000000..c6a42d00220714
--- /dev/null
+++ b/tools/doc/node_modules/js-yaml/lib/js-yaml/type/js/function.js
@@ -0,0 +1,84 @@
+'use strict';
+
+var esprima;
+
+// Browserified version does not have esprima
+//
+// 1. For node.js just require module as deps
+// 2. For browser try to require mudule via external AMD system.
+//    If not found - try to fallback to window.esprima. If not
+//    found too - then fail to parse.
+//
+try {
+  // workaround to exclude package from browserify list.
+  var _require = require;
+  esprima = _require('esprima');
+} catch (_) {
+  /*global window */
+  if (typeof window !== 'undefined') esprima = window.esprima;
+}
+
+var Type = require('../../type');
+
+function resolveJavascriptFunction(data) {
+  if (data === null) return false;
+
+  try {
+    var source = '(' + data + ')',
+        ast    = esprima.parse(source, { range: true });
+
+    if (ast.type                    !== 'Program'             ||
+        ast.body.length             !== 1                     ||
+        ast.body[0].type            !== 'ExpressionStatement' ||
+        ast.body[0].expression.type !== 'FunctionExpression') {
+      return false;
+    }
+
+    return true;
+  } catch (err) {
+    return false;
+  }
+}
+
+function constructJavascriptFunction(data) {
+  /*jslint evil:true*/
+
+  var source = '(' + data + ')',
+      ast    = esprima.parse(source, { range: true }),
+      params = [],
+      body;
+
+  if (ast.type                    !== 'Program'             ||
+      ast.body.length             !== 1                     ||
+      ast.body[0].type            !== 'ExpressionStatement' ||
+      ast.body[0].expression.type !== 'FunctionExpression') {
+    throw new Error('Failed to resolve function');
+  }
+
+  ast.body[0].expression.params.forEach(function (param) {
+    params.push(param.name);
+  });
+
+  body = ast.body[0].expression.body.range;
+
+  // Esprima's ranges include the first '{' and the last '}' characters on
+  // function expressions. So cut them out.
+  /*eslint-disable no-new-func*/
+  return new Function(params, source.slice(body[0] + 1, body[1] - 1));
+}
+
+function representJavascriptFunction(object /*, style*/) {
+  return object.toString();
+}
+
+function isFunction(object) {
+  return Object.prototype.toString.call(object) === '[object Function]';
+}
+
+module.exports = new Type('tag:yaml.org,2002:js/function', {
+  kind: 'scalar',
+  resolve: resolveJavascriptFunction,
+  construct: constructJavascriptFunction,
+  predicate: isFunction,
+  represent: representJavascriptFunction
+});
diff --git a/tools/doc/node_modules/js-yaml/lib/js-yaml/type/js/regexp.js b/tools/doc/node_modules/js-yaml/lib/js-yaml/type/js/regexp.js
new file mode 100644
index 00000000000000..43fa47017619ec
--- /dev/null
+++ b/tools/doc/node_modules/js-yaml/lib/js-yaml/type/js/regexp.js
@@ -0,0 +1,60 @@
+'use strict';
+
+var Type = require('../../type');
+
+function resolveJavascriptRegExp(data) {
+  if (data === null) return false;
+  if (data.length === 0) return false;
+
+  var regexp = data,
+      tail   = /\/([gim]*)$/.exec(data),
+      modifiers = '';
+
+  // if regexp starts with '/' it can have modifiers and must be properly closed
+  // `/foo/gim` - modifiers tail can be maximum 3 chars
+  if (regexp[0] === '/') {
+    if (tail) modifiers = tail[1];
+
+    if (modifiers.length > 3) return false;
+    // if expression starts with /, is should be properly terminated
+    if (regexp[regexp.length - modifiers.length - 1] !== '/') return false;
+  }
+
+  return true;
+}
+
+function constructJavascriptRegExp(data) {
+  var regexp = data,
+      tail   = /\/([gim]*)$/.exec(data),
+      modifiers = '';
+
+  // `/foo/gim` - tail can be maximum 4 chars
+  if (regexp[0] === '/') {
+    if (tail) modifiers = tail[1];
+    regexp = regexp.slice(1, regexp.length - modifiers.length - 1);
+  }
+
+  return new RegExp(regexp, modifiers);
+}
+
+function representJavascriptRegExp(object /*, style*/) {
+  var result = '/' + object.source + '/';
+
+  if (object.global) result += 'g';
+  if (object.multiline) result += 'm';
+  if (object.ignoreCase) result += 'i';
+
+  return result;
+}
+
+function isRegExp(object) {
+  return Object.prototype.toString.call(object) === '[object RegExp]';
+}
+
+module.exports = new Type('tag:yaml.org,2002:js/regexp', {
+  kind: 'scalar',
+  resolve: resolveJavascriptRegExp,
+  construct: constructJavascriptRegExp,
+  predicate: isRegExp,
+  represent: representJavascriptRegExp
+});
diff --git a/tools/doc/node_modules/js-yaml/lib/js-yaml/type/js/undefined.js b/tools/doc/node_modules/js-yaml/lib/js-yaml/type/js/undefined.js
new file mode 100644
index 00000000000000..95b5569fdfa510
--- /dev/null
+++ b/tools/doc/node_modules/js-yaml/lib/js-yaml/type/js/undefined.js
@@ -0,0 +1,28 @@
+'use strict';
+
+var Type = require('../../type');
+
+function resolveJavascriptUndefined() {
+  return true;
+}
+
+function constructJavascriptUndefined() {
+  /*eslint-disable no-undefined*/
+  return undefined;
+}
+
+function representJavascriptUndefined() {
+  return '';
+}
+
+function isUndefined(object) {
+  return typeof object === 'undefined';
+}
+
+module.exports = new Type('tag:yaml.org,2002:js/undefined', {
+  kind: 'scalar',
+  resolve: resolveJavascriptUndefined,
+  construct: constructJavascriptUndefined,
+  predicate: isUndefined,
+  represent: representJavascriptUndefined
+});
diff --git a/tools/doc/node_modules/js-yaml/lib/js-yaml/type/map.js b/tools/doc/node_modules/js-yaml/lib/js-yaml/type/map.js
new file mode 100644
index 00000000000000..f327beebd53bdb
--- /dev/null
+++ b/tools/doc/node_modules/js-yaml/lib/js-yaml/type/map.js
@@ -0,0 +1,8 @@
+'use strict';
+
+var Type = require('../type');
+
+module.exports = new Type('tag:yaml.org,2002:map', {
+  kind: 'mapping',
+  construct: function (data) { return data !== null ? data : {}; }
+});
diff --git a/tools/doc/node_modules/js-yaml/lib/js-yaml/type/merge.js b/tools/doc/node_modules/js-yaml/lib/js-yaml/type/merge.js
new file mode 100644
index 00000000000000..ae08a86444cf1c
--- /dev/null
+++ b/tools/doc/node_modules/js-yaml/lib/js-yaml/type/merge.js
@@ -0,0 +1,12 @@
+'use strict';
+
+var Type = require('../type');
+
+function resolveYamlMerge(data) {
+  return data === '<<' || data === null;
+}
+
+module.exports = new Type('tag:yaml.org,2002:merge', {
+  kind: 'scalar',
+  resolve: resolveYamlMerge
+});
diff --git a/tools/doc/node_modules/js-yaml/lib/js-yaml/type/null.js b/tools/doc/node_modules/js-yaml/lib/js-yaml/type/null.js
new file mode 100644
index 00000000000000..6874daa6471eca
--- /dev/null
+++ b/tools/doc/node_modules/js-yaml/lib/js-yaml/type/null.js
@@ -0,0 +1,34 @@
+'use strict';
+
+var Type = require('../type');
+
+function resolveYamlNull(data) {
+  if (data === null) return true;
+
+  var max = data.length;
+
+  return (max === 1 && data === '~') ||
+         (max === 4 && (data === 'null' || data === 'Null' || data === 'NULL'));
+}
+
+function constructYamlNull() {
+  return null;
+}
+
+function isNull(object) {
+  return object === null;
+}
+
+module.exports = new Type('tag:yaml.org,2002:null', {
+  kind: 'scalar',
+  resolve: resolveYamlNull,
+  construct: constructYamlNull,
+  predicate: isNull,
+  represent: {
+    canonical: function () { return '~';    },
+    lowercase: function () { return 'null'; },
+    uppercase: function () { return 'NULL'; },
+    camelcase: function () { return 'Null'; }
+  },
+  defaultStyle: 'lowercase'
+});
diff --git a/tools/doc/node_modules/js-yaml/lib/js-yaml/type/omap.js b/tools/doc/node_modules/js-yaml/lib/js-yaml/type/omap.js
new file mode 100644
index 00000000000000..b2b5323bd1cd9e
--- /dev/null
+++ b/tools/doc/node_modules/js-yaml/lib/js-yaml/type/omap.js
@@ -0,0 +1,44 @@
+'use strict';
+
+var Type = require('../type');
+
+var _hasOwnProperty = Object.prototype.hasOwnProperty;
+var _toString       = Object.prototype.toString;
+
+function resolveYamlOmap(data) {
+  if (data === null) return true;
+
+  var objectKeys = [], index, length, pair, pairKey, pairHasKey,
+      object = data;
+
+  for (index = 0, length = object.length; index < length; index += 1) {
+    pair = object[index];
+    pairHasKey = false;
+
+    if (_toString.call(pair) !== '[object Object]') return false;
+
+    for (pairKey in pair) {
+      if (_hasOwnProperty.call(pair, pairKey)) {
+        if (!pairHasKey) pairHasKey = true;
+        else return false;
+      }
+    }
+
+    if (!pairHasKey) return false;
+
+    if (objectKeys.indexOf(pairKey) === -1) objectKeys.push(pairKey);
+    else return false;
+  }
+
+  return true;
+}
+
+function constructYamlOmap(data) {
+  return data !== null ? data : [];
+}
+
+module.exports = new Type('tag:yaml.org,2002:omap', {
+  kind: 'sequence',
+  resolve: resolveYamlOmap,
+  construct: constructYamlOmap
+});
diff --git a/tools/doc/node_modules/js-yaml/lib/js-yaml/type/pairs.js b/tools/doc/node_modules/js-yaml/lib/js-yaml/type/pairs.js
new file mode 100644
index 00000000000000..74b52403fc125d
--- /dev/null
+++ b/tools/doc/node_modules/js-yaml/lib/js-yaml/type/pairs.js
@@ -0,0 +1,53 @@
+'use strict';
+
+var Type = require('../type');
+
+var _toString = Object.prototype.toString;
+
+function resolveYamlPairs(data) {
+  if (data === null) return true;
+
+  var index, length, pair, keys, result,
+      object = data;
+
+  result = new Array(object.length);
+
+  for (index = 0, length = object.length; index < length; index += 1) {
+    pair = object[index];
+
+    if (_toString.call(pair) !== '[object Object]') return false;
+
+    keys = Object.keys(pair);
+
+    if (keys.length !== 1) return false;
+
+    result[index] = [ keys[0], pair[keys[0]] ];
+  }
+
+  return true;
+}
+
+function constructYamlPairs(data) {
+  if (data === null) return [];
+
+  var index, length, pair, keys, result,
+      object = data;
+
+  result = new Array(object.length);
+
+  for (index = 0, length = object.length; index < length; index += 1) {
+    pair = object[index];
+
+    keys = Object.keys(pair);
+
+    result[index] = [ keys[0], pair[keys[0]] ];
+  }
+
+  return result;
+}
+
+module.exports = new Type('tag:yaml.org,2002:pairs', {
+  kind: 'sequence',
+  resolve: resolveYamlPairs,
+  construct: constructYamlPairs
+});
diff --git a/tools/doc/node_modules/js-yaml/lib/js-yaml/type/seq.js b/tools/doc/node_modules/js-yaml/lib/js-yaml/type/seq.js
new file mode 100644
index 00000000000000..be8f77f2844bdd
--- /dev/null
+++ b/tools/doc/node_modules/js-yaml/lib/js-yaml/type/seq.js
@@ -0,0 +1,8 @@
+'use strict';
+
+var Type = require('../type');
+
+module.exports = new Type('tag:yaml.org,2002:seq', {
+  kind: 'sequence',
+  construct: function (data) { return data !== null ? data : []; }
+});
diff --git a/tools/doc/node_modules/js-yaml/lib/js-yaml/type/set.js b/tools/doc/node_modules/js-yaml/lib/js-yaml/type/set.js
new file mode 100644
index 00000000000000..f885a329c2ca0a
--- /dev/null
+++ b/tools/doc/node_modules/js-yaml/lib/js-yaml/type/set.js
@@ -0,0 +1,29 @@
+'use strict';
+
+var Type = require('../type');
+
+var _hasOwnProperty = Object.prototype.hasOwnProperty;
+
+function resolveYamlSet(data) {
+  if (data === null) return true;
+
+  var key, object = data;
+
+  for (key in object) {
+    if (_hasOwnProperty.call(object, key)) {
+      if (object[key] !== null) return false;
+    }
+  }
+
+  return true;
+}
+
+function constructYamlSet(data) {
+  return data !== null ? data : {};
+}
+
+module.exports = new Type('tag:yaml.org,2002:set', {
+  kind: 'mapping',
+  resolve: resolveYamlSet,
+  construct: constructYamlSet
+});
diff --git a/tools/doc/node_modules/js-yaml/lib/js-yaml/type/str.js b/tools/doc/node_modules/js-yaml/lib/js-yaml/type/str.js
new file mode 100644
index 00000000000000..27acc106caaf75
--- /dev/null
+++ b/tools/doc/node_modules/js-yaml/lib/js-yaml/type/str.js
@@ -0,0 +1,8 @@
+'use strict';
+
+var Type = require('../type');
+
+module.exports = new Type('tag:yaml.org,2002:str', {
+  kind: 'scalar',
+  construct: function (data) { return data !== null ? data : ''; }
+});
diff --git a/tools/doc/node_modules/js-yaml/lib/js-yaml/type/timestamp.js b/tools/doc/node_modules/js-yaml/lib/js-yaml/type/timestamp.js
new file mode 100644
index 00000000000000..8fa9c5865697ed
--- /dev/null
+++ b/tools/doc/node_modules/js-yaml/lib/js-yaml/type/timestamp.js
@@ -0,0 +1,88 @@
+'use strict';
+
+var Type = require('../type');
+
+var YAML_DATE_REGEXP = new RegExp(
+  '^([0-9][0-9][0-9][0-9])'          + // [1] year
+  '-([0-9][0-9])'                    + // [2] month
+  '-([0-9][0-9])$');                   // [3] day
+
+var YAML_TIMESTAMP_REGEXP = new RegExp(
+  '^([0-9][0-9][0-9][0-9])'          + // [1] year
+  '-([0-9][0-9]?)'                   + // [2] month
+  '-([0-9][0-9]?)'                   + // [3] day
+  '(?:[Tt]|[ \\t]+)'                 + // ...
+  '([0-9][0-9]?)'                    + // [4] hour
+  ':([0-9][0-9])'                    + // [5] minute
+  ':([0-9][0-9])'                    + // [6] second
+  '(?:\\.([0-9]*))?'                 + // [7] fraction
+  '(?:[ \\t]*(Z|([-+])([0-9][0-9]?)' + // [8] tz [9] tz_sign [10] tz_hour
+  '(?::([0-9][0-9]))?))?$');           // [11] tz_minute
+
+function resolveYamlTimestamp(data) {
+  if (data === null) return false;
+  if (YAML_DATE_REGEXP.exec(data) !== null) return true;
+  if (YAML_TIMESTAMP_REGEXP.exec(data) !== null) return true;
+  return false;
+}
+
+function constructYamlTimestamp(data) {
+  var match, year, month, day, hour, minute, second, fraction = 0,
+      delta = null, tz_hour, tz_minute, date;
+
+  match = YAML_DATE_REGEXP.exec(data);
+  if (match === null) match = YAML_TIMESTAMP_REGEXP.exec(data);
+
+  if (match === null) throw new Error('Date resolve error');
+
+  // match: [1] year [2] month [3] day
+
+  year = +(match[1]);
+  month = +(match[2]) - 1; // JS month starts with 0
+  day = +(match[3]);
+
+  if (!match[4]) { // no hour
+    return new Date(Date.UTC(year, month, day));
+  }
+
+  // match: [4] hour [5] minute [6] second [7] fraction
+
+  hour = +(match[4]);
+  minute = +(match[5]);
+  second = +(match[6]);
+
+  if (match[7]) {
+    fraction = match[7].slice(0, 3);
+    while (fraction.length < 3) { // milli-seconds
+      fraction += '0';
+    }
+    fraction = +fraction;
+  }
+
+  // match: [8] tz [9] tz_sign [10] tz_hour [11] tz_minute
+
+  if (match[9]) {
+    tz_hour = +(match[10]);
+    tz_minute = +(match[11] || 0);
+    delta = (tz_hour * 60 + tz_minute) * 60000; // delta in mili-seconds
+    if (match[9] === '-') delta = -delta;
+  }
+
+  date = new Date(Date.UTC(year, month, day, hour, minute, second, fraction));
+
+  if (delta) date.setTime(date.getTime() - delta);
+
+  return date;
+}
+
+function representYamlTimestamp(object /*, style*/) {
+  return object.toISOString();
+}
+
+module.exports = new Type('tag:yaml.org,2002:timestamp', {
+  kind: 'scalar',
+  resolve: resolveYamlTimestamp,
+  construct: constructYamlTimestamp,
+  instanceOf: Date,
+  represent: representYamlTimestamp
+});
diff --git a/tools/doc/node_modules/js-yaml/package.json b/tools/doc/node_modules/js-yaml/package.json
new file mode 100644
index 00000000000000..698fd38f92a967
--- /dev/null
+++ b/tools/doc/node_modules/js-yaml/package.json
@@ -0,0 +1,126 @@
+{
+  "_args": [
+    [
+      {
+        "name": "js-yaml",
+        "raw": "js-yaml@^3.5.2",
+        "rawSpec": "^3.5.2",
+        "scope": null,
+        "spec": ">=3.5.2 <4.0.0",
+        "type": "range"
+      },
+      "/Users/svairamani/git/node/tools/doc"
+    ]
+  ],
+  "_from": "js-yaml@>=3.5.2 <4.0.0",
+  "_id": "js-yaml@3.6.1",
+  "_inCache": true,
+  "_installable": true,
+  "_location": "/js-yaml",
+  "_nodeVersion": "4.4.3",
+  "_npmOperationalInternal": {
+    "host": "packages-12-west.internal.npmjs.com",
+    "tmp": "tmp/js-yaml-3.6.1.tgz_1462995636349_0.2209061929024756"
+  },
+  "_npmUser": {
+    "email": "vitaly@rcdesign.ru",
+    "name": "vitaly"
+  },
+  "_npmVersion": "2.15.1",
+  "_phantomChildren": {},
+  "_requested": {
+    "name": "js-yaml",
+    "raw": "js-yaml@^3.5.2",
+    "rawSpec": "^3.5.2",
+    "scope": null,
+    "spec": ">=3.5.2 <4.0.0",
+    "type": "range"
+  },
+  "_requiredBy": [
+    "/"
+  ],
+  "_resolved": "http://npm.paypal.com/js-yaml/-/js-yaml-3.6.1.tgz",
+  "_shasum": "6e5fe67d8b205ce4d22fad05b7781e8dadcc4b30",
+  "_shrinkwrap": null,
+  "_spec": "js-yaml@^3.5.2",
+  "_where": "/Users/svairamani/git/node/tools/doc",
+  "author": {
+    "email": "dervus.grim@gmail.com",
+    "name": "Vladimir Zapparov"
+  },
+  "bin": {
+    "js-yaml": "bin/js-yaml.js"
+  },
+  "bugs": {
+    "url": "https://github.com/nodeca/js-yaml/issues"
+  },
+  "contributors": [
+    {
+      "email": "ixti@member.fsf.org",
+      "name": "Aleksey V Zapparov",
+      "url": "http://www.ixti.net/"
+    },
+    {
+      "email": "vitaly@rcdesign.ru",
+      "name": "Vitaly Puzrin",
+      "url": "https://github.com/puzrin"
+    },
+    {
+      "email": "martin.grenfell@gmail.com",
+      "name": "Martin Grenfell",
+      "url": "http://got-ravings.blogspot.com"
+    }
+  ],
+  "dependencies": {
+    "argparse": "^1.0.7",
+    "esprima": "^2.6.0"
+  },
+  "description": "YAML 1.2 parser and serializer",
+  "devDependencies": {
+    "ansi": "*",
+    "benchmark": "*",
+    "browserify": "^13.0.0",
+    "codemirror": "^5.13.4",
+    "eslint": "^2.8.0",
+    "istanbul": "*",
+    "mocha": "*",
+    "uglify-js": "^2.6.1"
+  },
+  "directories": {},
+  "dist": {
+    "shasum": "6e5fe67d8b205ce4d22fad05b7781e8dadcc4b30",
+    "tarball": "http://npm.paypal.com/js-yaml/-/js-yaml-3.6.1.tgz"
+  },
+  "files": [
+    "index.js",
+    "lib/",
+    "bin/",
+    "dist/"
+  ],
+  "gitHead": "c76b837cacc69de6b86a0781db31a9bb7a193875",
+  "homepage": "https://github.com/nodeca/js-yaml",
+  "keywords": [
+    "yaml",
+    "parser",
+    "serializer",
+    "pyyaml"
+  ],
+  "license": "MIT",
+  "maintainers": [
+    {
+      "email": "vitaly@rcdesign.ru",
+      "name": "vitaly"
+    }
+  ],
+  "name": "js-yaml",
+  "optionalDependencies": {},
+  "readme": "ERROR: No README data found!",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/nodeca/js-yaml.git"
+  },
+  "scripts": {
+    "test": "make test"
+  },
+  "version": "3.6.1"
+}
diff --git a/tools/doc/node_modules/sprintf-js/.npmignore b/tools/doc/node_modules/sprintf-js/.npmignore
new file mode 100644
index 00000000000000..096746c1480d8f
--- /dev/null
+++ b/tools/doc/node_modules/sprintf-js/.npmignore
@@ -0,0 +1 @@
+/node_modules/
\ No newline at end of file
diff --git a/tools/doc/node_modules/sprintf-js/LICENSE b/tools/doc/node_modules/sprintf-js/LICENSE
new file mode 100644
index 00000000000000..663ac52e4d8cd9
--- /dev/null
+++ b/tools/doc/node_modules/sprintf-js/LICENSE
@@ -0,0 +1,24 @@
+Copyright (c) 2007-2014, Alexandru Marasteanu <hello [at) alexei (dot] ro>
+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 this software 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 AUTHORS OR COPYRIGHT HOLDERS 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.
diff --git a/tools/doc/node_modules/sprintf-js/README.md b/tools/doc/node_modules/sprintf-js/README.md
new file mode 100644
index 00000000000000..83863561b29199
--- /dev/null
+++ b/tools/doc/node_modules/sprintf-js/README.md
@@ -0,0 +1,88 @@
+# sprintf.js
+**sprintf.js** is a complete open source JavaScript sprintf implementation for the *browser* and *node.js*.
+
+Its prototype is simple:
+
+    string sprintf(string format , [mixed arg1 [, mixed arg2 [ ,...]]])
+
+The placeholders in the format string are marked by `%` and are followed by one or more of these elements, in this order:
+
+* An optional number followed by a `$` sign that selects which argument index to use for the value. If not specified, arguments will be placed in the same order as the placeholders in the input string.
+* An optional `+` sign that forces to preceed the result with a plus or minus sign on numeric values. By default, only the `-` sign is used on negative numbers.
+* An optional padding specifier that says what character to use for padding (if specified). Possible values are `0` or any other character precedeed by a `'` (single quote). The default is to pad with *spaces*.
+* An optional `-` sign, that causes sprintf to left-align the result of this placeholder. The default is to right-align the result.
+* An optional number, that says how many characters the result should have. If the value to be returned is shorter than this number, the result will be padded. When used with the `j` (JSON) type specifier, the padding length specifies the tab size used for indentation.
+* An optional precision modifier, consisting of a `.` (dot) followed by a number, that says how many digits should be displayed for floating point numbers. When used with the `g` type specifier, it specifies the number of significant digits. When used on a string, it causes the result to be truncated.
+* A type specifier that can be any of:
+    * `%` — yields a literal `%` character
+    * `b` — yields an integer as a binary number
+    * `c` — yields an integer as the character with that ASCII value
+    * `d` or `i` — yields an integer as a signed decimal number
+    * `e` — yields a float using scientific notation
+    * `u` — yields an integer as an unsigned decimal number
+    * `f` — yields a float as is; see notes on precision above
+    * `g` — yields a float as is; see notes on precision above
+    * `o` — yields an integer as an octal number
+    * `s` — yields a string as is
+    * `x` — yields an integer as a hexadecimal number (lower-case)
+    * `X` — yields an integer as a hexadecimal number (upper-case)
+    * `j` — yields a JavaScript object or array as a JSON encoded string
+
+## JavaScript `vsprintf`
+`vsprintf` is the same as `sprintf` except that it accepts an array of arguments, rather than a variable number of arguments:
+
+    vsprintf("The first 4 letters of the english alphabet are: %s, %s, %s and %s", ["a", "b", "c", "d"])
+
+## Argument swapping
+You can also swap the arguments. That is, the order of the placeholders doesn't have to match the order of the arguments. You can do that by simply indicating in the format string which arguments the placeholders refer to:
+
+    sprintf("%2$s %3$s a %1$s", "cracker", "Polly", "wants")
+And, of course, you can repeat the placeholders without having to increase the number of arguments.
+
+## Named arguments
+Format strings may contain replacement fields rather than positional placeholders. Instead of referring to a certain argument, you can now refer to a certain key within an object. Replacement fields are surrounded by rounded parentheses - `(` and `)` - and begin with a keyword that refers to a key:
+
+    var user = {
+        name: "Dolly"
+    }
+    sprintf("Hello %(name)s", user) // Hello Dolly
+Keywords in replacement fields can be optionally followed by any number of keywords or indexes:
+
+    var users = [
+        {name: "Dolly"},
+        {name: "Molly"},
+        {name: "Polly"}
+    ]
+    sprintf("Hello %(users[0].name)s, %(users[1].name)s and %(users[2].name)s", {users: users}) // Hello Dolly, Molly and Polly
+Note: mixing positional and named placeholders is not (yet) supported
+
+## Computed values
+You can pass in a function as a dynamic value and it will be invoked (with no arguments) in order to compute the value on-the-fly.
+
+    sprintf("Current timestamp: %d", Date.now) // Current timestamp: 1398005382890
+    sprintf("Current date and time: %s", function() { return new Date().toString() })
+
+# AngularJS
+You can now use `sprintf` and `vsprintf` (also aliased as `fmt` and `vfmt` respectively) in your AngularJS projects. See `demo/`.
+
+# Installation
+
+## Via Bower
+
+    bower install sprintf
+
+## Or as a node.js module
+
+    npm install sprintf-js
+
+### Usage
+
+    var sprintf = require("sprintf-js").sprintf,
+        vsprintf = require("sprintf-js").vsprintf
+
+    sprintf("%2$s %3$s a %1$s", "cracker", "Polly", "wants")
+    vsprintf("The first 4 letters of the english alphabet are: %s, %s, %s and %s", ["a", "b", "c", "d"])
+
+# License
+
+**sprintf.js** is licensed under the terms of the 3-clause BSD license.
diff --git a/tools/doc/node_modules/sprintf-js/bower.json b/tools/doc/node_modules/sprintf-js/bower.json
new file mode 100644
index 00000000000000..d90a75989f7b05
--- /dev/null
+++ b/tools/doc/node_modules/sprintf-js/bower.json
@@ -0,0 +1,14 @@
+{
+  "name": "sprintf",
+  "description": "JavaScript sprintf implementation",
+  "version": "1.0.3",
+  "main": "src/sprintf.js",
+  "license": "BSD-3-Clause-Clear",
+  "keywords": ["sprintf", "string", "formatting"],
+  "authors": ["Alexandru Marasteanu <hello@alexei.ro> (http://alexei.ro/)"],
+  "homepage": "https://github.com/alexei/sprintf.js",
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/alexei/sprintf.js.git"
+  }
+}
diff --git a/tools/doc/node_modules/sprintf-js/demo/angular.html b/tools/doc/node_modules/sprintf-js/demo/angular.html
new file mode 100644
index 00000000000000..3559efd7635634
--- /dev/null
+++ b/tools/doc/node_modules/sprintf-js/demo/angular.html
@@ -0,0 +1,20 @@
+<!doctype html>
+<html ng-app="app">
+<head>
+    <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.3.0-rc.3/angular.min.js"></script>
+    <script src="../src/sprintf.js"></script>
+    <script src="../src/angular-sprintf.js"></script>
+</head>
+<body>
+    <pre>{{ "%+010d"|sprintf:-123 }}</pre>
+    <pre>{{ "%+010d"|vsprintf:[-123] }}</pre>
+    <pre>{{ "%+010d"|fmt:-123 }}</pre>
+    <pre>{{ "%+010d"|vfmt:[-123] }}</pre>
+    <pre>{{ "I've got %2$d apples and %1$d oranges."|fmt:4:2 }}</pre>
+    <pre>{{ "I've got %(apples)d apples and %(oranges)d oranges."|fmt:{apples: 2, oranges: 4} }}</pre>
+
+    <script>
+        angular.module("app", ["sprintf"])
+    </script>
+</body>
+</html>
diff --git a/tools/doc/node_modules/sprintf-js/dist/angular-sprintf.min.js b/tools/doc/node_modules/sprintf-js/dist/angular-sprintf.min.js
new file mode 100644
index 00000000000000..dbaf744d83c214
--- /dev/null
+++ b/tools/doc/node_modules/sprintf-js/dist/angular-sprintf.min.js
@@ -0,0 +1,4 @@
+/*! sprintf-js | Alexandru Marasteanu <hello@alexei.ro> (http://alexei.ro/) | BSD-3-Clause */
+
+angular.module("sprintf",[]).filter("sprintf",function(){return function(){return sprintf.apply(null,arguments)}}).filter("fmt",["$filter",function(a){return a("sprintf")}]).filter("vsprintf",function(){return function(a,b){return vsprintf(a,b)}}).filter("vfmt",["$filter",function(a){return a("vsprintf")}]);
+//# sourceMappingURL=angular-sprintf.min.map
\ No newline at end of file
diff --git a/tools/doc/node_modules/sprintf-js/dist/angular-sprintf.min.js.map b/tools/doc/node_modules/sprintf-js/dist/angular-sprintf.min.js.map
new file mode 100644
index 00000000000000..055964c624c1ac
--- /dev/null
+++ b/tools/doc/node_modules/sprintf-js/dist/angular-sprintf.min.js.map
@@ -0,0 +1 @@
+{"version":3,"file":"angular-sprintf.min.js","sources":["../src/angular-sprintf.js"],"names":["angular","module","filter","sprintf","apply","arguments","$filter","format","argv","vsprintf"],"mappings":";;AAAAA,QACIC,OAAO,cACPC,OAAO,UAAW,WACd,MAAO,YACH,MAAOC,SAAQC,MAAM,KAAMC,cAGnCH,OAAO,OAAQ,UAAW,SAASI,GAC/B,MAAOA,GAAQ,cAEnBJ,OAAO,WAAY,WACf,MAAO,UAASK,EAAQC,GACpB,MAAOC,UAASF,EAAQC,MAGhCN,OAAO,QAAS,UAAW,SAASI,GAChC,MAAOA,GAAQ"}
\ No newline at end of file
diff --git a/tools/doc/node_modules/sprintf-js/dist/angular-sprintf.min.map b/tools/doc/node_modules/sprintf-js/dist/angular-sprintf.min.map
new file mode 100644
index 00000000000000..055964c624c1ac
--- /dev/null
+++ b/tools/doc/node_modules/sprintf-js/dist/angular-sprintf.min.map
@@ -0,0 +1 @@
+{"version":3,"file":"angular-sprintf.min.js","sources":["../src/angular-sprintf.js"],"names":["angular","module","filter","sprintf","apply","arguments","$filter","format","argv","vsprintf"],"mappings":";;AAAAA,QACIC,OAAO,cACPC,OAAO,UAAW,WACd,MAAO,YACH,MAAOC,SAAQC,MAAM,KAAMC,cAGnCH,OAAO,OAAQ,UAAW,SAASI,GAC/B,MAAOA,GAAQ,cAEnBJ,OAAO,WAAY,WACf,MAAO,UAASK,EAAQC,GACpB,MAAOC,UAASF,EAAQC,MAGhCN,OAAO,QAAS,UAAW,SAASI,GAChC,MAAOA,GAAQ"}
\ No newline at end of file
diff --git a/tools/doc/node_modules/sprintf-js/dist/sprintf.min.js b/tools/doc/node_modules/sprintf-js/dist/sprintf.min.js
new file mode 100644
index 00000000000000..dc61e51add29bb
--- /dev/null
+++ b/tools/doc/node_modules/sprintf-js/dist/sprintf.min.js
@@ -0,0 +1,4 @@
+/*! sprintf-js | Alexandru Marasteanu <hello@alexei.ro> (http://alexei.ro/) | BSD-3-Clause */
+
+!function(a){function b(){var a=arguments[0],c=b.cache;return c[a]&&c.hasOwnProperty(a)||(c[a]=b.parse(a)),b.format.call(null,c[a],arguments)}function c(a){return Object.prototype.toString.call(a).slice(8,-1).toLowerCase()}function d(a,b){return Array(b+1).join(a)}var e={not_string:/[^s]/,number:/[diefg]/,json:/[j]/,not_json:/[^j]/,text:/^[^\x25]+/,modulo:/^\x25{2}/,placeholder:/^\x25(?:([1-9]\d*)\$|\(([^\)]+)\))?(\+)?(0|'[^$])?(-)?(\d+)?(?:\.(\d+))?([b-gijosuxX])/,key:/^([a-z_][a-z_\d]*)/i,key_access:/^\.([a-z_][a-z_\d]*)/i,index_access:/^\[(\d+)\]/,sign:/^[\+\-]/};b.format=function(a,f){var g,h,i,j,k,l,m,n=1,o=a.length,p="",q=[],r=!0,s="";for(h=0;o>h;h++)if(p=c(a[h]),"string"===p)q[q.length]=a[h];else if("array"===p){if(j=a[h],j[2])for(g=f[n],i=0;i<j[2].length;i++){if(!g.hasOwnProperty(j[2][i]))throw new Error(b("[sprintf] property '%s' does not exist",j[2][i]));g=g[j[2][i]]}else g=j[1]?f[j[1]]:f[n++];if("function"==c(g)&&(g=g()),e.not_string.test(j[8])&&e.not_json.test(j[8])&&"number"!=c(g)&&isNaN(g))throw new TypeError(b("[sprintf] expecting number but found %s",c(g)));switch(e.number.test(j[8])&&(r=g>=0),j[8]){case"b":g=g.toString(2);break;case"c":g=String.fromCharCode(g);break;case"d":case"i":g=parseInt(g,10);break;case"j":g=JSON.stringify(g,null,j[6]?parseInt(j[6]):0);break;case"e":g=j[7]?g.toExponential(j[7]):g.toExponential();break;case"f":g=j[7]?parseFloat(g).toFixed(j[7]):parseFloat(g);break;case"g":g=j[7]?parseFloat(g).toPrecision(j[7]):parseFloat(g);break;case"o":g=g.toString(8);break;case"s":g=(g=String(g))&&j[7]?g.substring(0,j[7]):g;break;case"u":g>>>=0;break;case"x":g=g.toString(16);break;case"X":g=g.toString(16).toUpperCase()}e.json.test(j[8])?q[q.length]=g:(!e.number.test(j[8])||r&&!j[3]?s="":(s=r?"+":"-",g=g.toString().replace(e.sign,"")),l=j[4]?"0"===j[4]?"0":j[4].charAt(1):" ",m=j[6]-(s+g).length,k=j[6]&&m>0?d(l,m):"",q[q.length]=j[5]?s+g+k:"0"===l?s+k+g:k+s+g)}return q.join("")},b.cache={},b.parse=function(a){for(var b=a,c=[],d=[],f=0;b;){if(null!==(c=e.text.exec(b)))d[d.length]=c[0];else if(null!==(c=e.modulo.exec(b)))d[d.length]="%";else{if(null===(c=e.placeholder.exec(b)))throw new SyntaxError("[sprintf] unexpected placeholder");if(c[2]){f|=1;var g=[],h=c[2],i=[];if(null===(i=e.key.exec(h)))throw new SyntaxError("[sprintf] failed to parse named argument key");for(g[g.length]=i[1];""!==(h=h.substring(i[0].length));)if(null!==(i=e.key_access.exec(h)))g[g.length]=i[1];else{if(null===(i=e.index_access.exec(h)))throw new SyntaxError("[sprintf] failed to parse named argument key");g[g.length]=i[1]}c[2]=g}else f|=2;if(3===f)throw new Error("[sprintf] mixing positional and named placeholders is not (yet) supported");d[d.length]=c}b=b.substring(c[0].length)}return d};var f=function(a,c,d){return d=(c||[]).slice(0),d.splice(0,0,a),b.apply(null,d)};"undefined"!=typeof exports?(exports.sprintf=b,exports.vsprintf=f):(a.sprintf=b,a.vsprintf=f,"function"==typeof define&&define.amd&&define(function(){return{sprintf:b,vsprintf:f}}))}("undefined"==typeof window?this:window);
+//# sourceMappingURL=sprintf.min.map
\ No newline at end of file
diff --git a/tools/doc/node_modules/sprintf-js/dist/sprintf.min.js.map b/tools/doc/node_modules/sprintf-js/dist/sprintf.min.js.map
new file mode 100644
index 00000000000000..369dbafab157ae
--- /dev/null
+++ b/tools/doc/node_modules/sprintf-js/dist/sprintf.min.js.map
@@ -0,0 +1 @@
+{"version":3,"file":"sprintf.min.js","sources":["../src/sprintf.js"],"names":["window","sprintf","key","arguments","cache","hasOwnProperty","parse","format","call","get_type","variable","Object","prototype","toString","slice","toLowerCase","str_repeat","input","multiplier","Array","join","re","not_string","number","json","not_json","text","modulo","placeholder","key_access","index_access","sign","parse_tree","argv","arg","i","k","match","pad","pad_character","pad_length","cursor","tree_length","length","node_type","output","is_positive","Error","test","isNaN","TypeError","String","fromCharCode","parseInt","JSON","stringify","toExponential","parseFloat","toFixed","substring","toUpperCase","replace","charAt","fmt","_fmt","arg_names","exec","SyntaxError","field_list","replacement_field","field_match","vsprintf","_argv","splice","apply","exports","define","amd","this"],"mappings":";;CAAA,SAAUA,GAeN,QAASC,KACL,GAAIC,GAAMC,UAAU,GAAIC,EAAQH,EAAQG,KAIxC,OAHMA,GAAMF,IAAQE,EAAMC,eAAeH,KACrCE,EAAMF,GAAOD,EAAQK,MAAMJ,IAExBD,EAAQM,OAAOC,KAAK,KAAMJ,EAAMF,GAAMC,WA4JjD,QAASM,GAASC,GACd,MAAOC,QAAOC,UAAUC,SAASL,KAAKE,GAAUI,MAAM,EAAG,IAAIC,cAGjE,QAASC,GAAWC,EAAOC,GACvB,MAAOC,OAAMD,EAAa,GAAGE,KAAKH,GApLtC,GAAII,IACAC,WAAY,OACZC,OAAQ,SACRC,KAAM,MACNC,SAAU,OACVC,KAAM,YACNC,OAAQ,WACRC,YAAa,yFACb1B,IAAK,sBACL2B,WAAY,wBACZC,aAAc,aACdC,KAAM,UAWV9B,GAAQM,OAAS,SAASyB,EAAYC,GAClC,GAAiEC,GAAkBC,EAAGC,EAAGC,EAAOC,EAAKC,EAAeC,EAAhHC,EAAS,EAAGC,EAAcV,EAAWW,OAAQC,EAAY,GAASC,KAA0DC,GAAc,EAAMf,EAAO,EAC3J,KAAKI,EAAI,EAAOO,EAAJP,EAAiBA,IAEzB,GADAS,EAAYnC,EAASuB,EAAWG,IACd,WAAdS,EACAC,EAAOA,EAAOF,QAAUX,EAAWG,OAElC,IAAkB,UAAdS,EAAuB,CAE5B,GADAP,EAAQL,EAAWG,GACfE,EAAM,GAEN,IADAH,EAAMD,EAAKQ,GACNL,EAAI,EAAGA,EAAIC,EAAM,GAAGM,OAAQP,IAAK,CAClC,IAAKF,EAAI7B,eAAegC,EAAM,GAAGD,IAC7B,KAAM,IAAIW,OAAM9C,EAAQ,yCAA0CoC,EAAM,GAAGD,IAE/EF,GAAMA,EAAIG,EAAM,GAAGD,QAIvBF,GADKG,EAAM,GACLJ,EAAKI,EAAM,IAGXJ,EAAKQ,IAOf,IAJqB,YAAjBhC,EAASyB,KACTA,EAAMA,KAGNb,EAAGC,WAAW0B,KAAKX,EAAM,KAAOhB,EAAGI,SAASuB,KAAKX,EAAM,KAAyB,UAAjB5B,EAASyB,IAAoBe,MAAMf,GAClG,KAAM,IAAIgB,WAAUjD,EAAQ,0CAA2CQ,EAASyB,IAOpF,QAJIb,EAAGE,OAAOyB,KAAKX,EAAM,MACrBS,EAAcZ,GAAO,GAGjBG,EAAM,IACV,IAAK,IACDH,EAAMA,EAAIrB,SAAS,EACvB,MACA,KAAK,IACDqB,EAAMiB,OAAOC,aAAalB,EAC9B,MACA,KAAK,IACL,IAAK,IACDA,EAAMmB,SAASnB,EAAK,GACxB,MACA,KAAK,IACDA,EAAMoB,KAAKC,UAAUrB,EAAK,KAAMG,EAAM,GAAKgB,SAAShB,EAAM,IAAM,EACpE,MACA,KAAK,IACDH,EAAMG,EAAM,GAAKH,EAAIsB,cAAcnB,EAAM,IAAMH,EAAIsB,eACvD,MACA,KAAK,IACDtB,EAAMG,EAAM,GAAKoB,WAAWvB,GAAKwB,QAAQrB,EAAM,IAAMoB,WAAWvB,EACpE,MACA,KAAK,IACDA,EAAMA,EAAIrB,SAAS,EACvB,MACA,KAAK,IACDqB,GAAQA,EAAMiB,OAAOjB,KAASG,EAAM,GAAKH,EAAIyB,UAAU,EAAGtB,EAAM,IAAMH,CAC1E,MACA,KAAK,IACDA,KAAc,CAClB,MACA,KAAK,IACDA,EAAMA,EAAIrB,SAAS,GACvB,MACA,KAAK,IACDqB,EAAMA,EAAIrB,SAAS,IAAI+C,cAG3BvC,EAAGG,KAAKwB,KAAKX,EAAM,IACnBQ,EAAOA,EAAOF,QAAUT,IAGpBb,EAAGE,OAAOyB,KAAKX,EAAM,KAASS,IAAeT,EAAM,GAKnDN,EAAO,IAJPA,EAAOe,EAAc,IAAM,IAC3BZ,EAAMA,EAAIrB,WAAWgD,QAAQxC,EAAGU,KAAM,KAK1CQ,EAAgBF,EAAM,GAAkB,MAAbA,EAAM,GAAa,IAAMA,EAAM,GAAGyB,OAAO,GAAK,IACzEtB,EAAaH,EAAM,IAAMN,EAAOG,GAAKS,OACrCL,EAAMD,EAAM,IAAMG,EAAa,EAAIxB,EAAWuB,EAAeC,GAAoB,GACjFK,EAAOA,EAAOF,QAAUN,EAAM,GAAKN,EAAOG,EAAMI,EAAyB,MAAlBC,EAAwBR,EAAOO,EAAMJ,EAAMI,EAAMP,EAAOG,GAI3H,MAAOW,GAAOzB,KAAK,KAGvBnB,EAAQG,SAERH,EAAQK,MAAQ,SAASyD,GAErB,IADA,GAAIC,GAAOD,EAAK1B,KAAYL,KAAiBiC,EAAY,EAClDD,GAAM,CACT,GAAqC,QAAhC3B,EAAQhB,EAAGK,KAAKwC,KAAKF,IACtBhC,EAAWA,EAAWW,QAAUN,EAAM,OAErC,IAAuC,QAAlCA,EAAQhB,EAAGM,OAAOuC,KAAKF,IAC7BhC,EAAWA,EAAWW,QAAU,QAE/B,CAAA,GAA4C,QAAvCN,EAAQhB,EAAGO,YAAYsC,KAAKF,IAgClC,KAAM,IAAIG,aAAY,mCA/BtB,IAAI9B,EAAM,GAAI,CACV4B,GAAa,CACb,IAAIG,MAAiBC,EAAoBhC,EAAM,GAAIiC,IACnD,IAAuD,QAAlDA,EAAcjD,EAAGnB,IAAIgE,KAAKG,IAe3B,KAAM,IAAIF,aAAY,+CAbtB,KADAC,EAAWA,EAAWzB,QAAU2B,EAAY,GACwC,MAA5ED,EAAoBA,EAAkBV,UAAUW,EAAY,GAAG3B,UACnE,GAA8D,QAAzD2B,EAAcjD,EAAGQ,WAAWqC,KAAKG,IAClCD,EAAWA,EAAWzB,QAAU2B,EAAY,OAE3C,CAAA,GAAgE,QAA3DA,EAAcjD,EAAGS,aAAaoC,KAAKG,IAIzC,KAAM,IAAIF,aAAY,+CAHtBC,GAAWA,EAAWzB,QAAU2B,EAAY,GAUxDjC,EAAM,GAAK+B,MAGXH,IAAa,CAEjB,IAAkB,IAAdA,EACA,KAAM,IAAIlB,OAAM,4EAEpBf,GAAWA,EAAWW,QAAUN,EAKpC2B,EAAOA,EAAKL,UAAUtB,EAAM,GAAGM,QAEnC,MAAOX,GAGX,IAAIuC,GAAW,SAASR,EAAK9B,EAAMuC,GAG/B,MAFAA,IAASvC,OAAYnB,MAAM,GAC3B0D,EAAMC,OAAO,EAAG,EAAGV,GACZ9D,EAAQyE,MAAM,KAAMF,GAiBR,oBAAZG,UACPA,QAAQ1E,QAAUA,EAClB0E,QAAQJ,SAAWA,IAGnBvE,EAAOC,QAAUA,EACjBD,EAAOuE,SAAWA,EAEI,kBAAXK,SAAyBA,OAAOC,KACvCD,OAAO,WACH,OACI3E,QAASA,EACTsE,SAAUA,OAKT,mBAAXvE,QAAyB8E,KAAO9E"}
\ No newline at end of file
diff --git a/tools/doc/node_modules/sprintf-js/dist/sprintf.min.map b/tools/doc/node_modules/sprintf-js/dist/sprintf.min.map
new file mode 100644
index 00000000000000..ee011aaa5aa56f
--- /dev/null
+++ b/tools/doc/node_modules/sprintf-js/dist/sprintf.min.map
@@ -0,0 +1 @@
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\ No newline at end of file
diff --git a/tools/doc/node_modules/sprintf-js/gruntfile.js b/tools/doc/node_modules/sprintf-js/gruntfile.js
new file mode 100644
index 00000000000000..246e1c3b9801fc
--- /dev/null
+++ b/tools/doc/node_modules/sprintf-js/gruntfile.js
@@ -0,0 +1,36 @@
+module.exports = function(grunt) {
+    grunt.initConfig({
+        pkg: grunt.file.readJSON("package.json"),
+
+        uglify: {
+            options: {
+                banner: "/*! <%= pkg.name %> | <%= pkg.author %> | <%= pkg.license %> */\n",
+                sourceMap: true
+            },
+            build: {
+                files: [
+                    {
+                        src: "src/sprintf.js",
+                        dest: "dist/sprintf.min.js"
+                    },
+                    {
+                        src: "src/angular-sprintf.js",
+                        dest: "dist/angular-sprintf.min.js"
+                    }
+                ]
+            }
+        },
+
+        watch: {
+            js: {
+                files: "src/*.js",
+                tasks: ["uglify"]
+            }
+        }
+    })
+
+    grunt.loadNpmTasks("grunt-contrib-uglify")
+    grunt.loadNpmTasks("grunt-contrib-watch")
+
+    grunt.registerTask("default", ["uglify", "watch"])
+}
diff --git a/tools/doc/node_modules/sprintf-js/package.json b/tools/doc/node_modules/sprintf-js/package.json
new file mode 100644
index 00000000000000..5edb22327cebc9
--- /dev/null
+++ b/tools/doc/node_modules/sprintf-js/package.json
@@ -0,0 +1,85 @@
+{
+  "_args": [
+    [
+      {
+        "name": "sprintf-js",
+        "raw": "sprintf-js@~1.0.2",
+        "rawSpec": "~1.0.2",
+        "scope": null,
+        "spec": ">=1.0.2 <1.1.0",
+        "type": "range"
+      },
+      "/Users/svairamani/git/node/tools/doc/node_modules/argparse"
+    ]
+  ],
+  "_from": "sprintf-js@>=1.0.2 <1.1.0",
+  "_id": "sprintf-js@1.0.3",
+  "_inCache": true,
+  "_installable": true,
+  "_location": "/sprintf-js",
+  "_nodeVersion": "0.12.4",
+  "_npmUser": {
+    "email": "hello@alexei.ro",
+    "name": "alexei"
+  },
+  "_npmVersion": "2.10.1",
+  "_phantomChildren": {},
+  "_requested": {
+    "name": "sprintf-js",
+    "raw": "sprintf-js@~1.0.2",
+    "rawSpec": "~1.0.2",
+    "scope": null,
+    "spec": ">=1.0.2 <1.1.0",
+    "type": "range"
+  },
+  "_requiredBy": [
+    "/argparse"
+  ],
+  "_resolved": "http://npm.paypal.com/sprintf-js/-/sprintf-js-1.0.3.tgz",
+  "_shasum": "04e6926f662895354f3dd015203633b857297e2c",
+  "_shrinkwrap": null,
+  "_spec": "sprintf-js@~1.0.2",
+  "_where": "/Users/svairamani/git/node/tools/doc/node_modules/argparse",
+  "author": {
+    "email": "hello@alexei.ro",
+    "name": "Alexandru Marasteanu",
+    "url": "http://alexei.ro/"
+  },
+  "bugs": {
+    "url": "https://github.com/alexei/sprintf.js/issues"
+  },
+  "dependencies": {},
+  "description": "JavaScript sprintf implementation",
+  "devDependencies": {
+    "grunt": "*",
+    "grunt-contrib-uglify": "*",
+    "grunt-contrib-watch": "*",
+    "mocha": "*"
+  },
+  "directories": {},
+  "dist": {
+    "shasum": "04e6926f662895354f3dd015203633b857297e2c",
+    "tarball": "http://npm.paypal.com/sprintf-js/-/sprintf-js-1.0.3.tgz"
+  },
+  "gitHead": "747b806c2dab5b64d5c9958c42884946a187c3b1",
+  "homepage": "https://github.com/alexei/sprintf.js#readme",
+  "license": "BSD-3-Clause",
+  "main": "src/sprintf.js",
+  "maintainers": [
+    {
+      "email": "hello@alexei.ro",
+      "name": "alexei"
+    }
+  ],
+  "name": "sprintf-js",
+  "optionalDependencies": {},
+  "readme": "ERROR: No README data found!",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/alexei/sprintf.js.git"
+  },
+  "scripts": {
+    "test": "mocha test/test.js"
+  },
+  "version": "1.0.3"
+}
diff --git a/tools/doc/node_modules/sprintf-js/src/angular-sprintf.js b/tools/doc/node_modules/sprintf-js/src/angular-sprintf.js
new file mode 100644
index 00000000000000..9c69123bea291a
--- /dev/null
+++ b/tools/doc/node_modules/sprintf-js/src/angular-sprintf.js
@@ -0,0 +1,18 @@
+angular.
+    module("sprintf", []).
+    filter("sprintf", function() {
+        return function() {
+            return sprintf.apply(null, arguments)
+        }
+    }).
+    filter("fmt", ["$filter", function($filter) {
+        return $filter("sprintf")
+    }]).
+    filter("vsprintf", function() {
+        return function(format, argv) {
+            return vsprintf(format, argv)
+        }
+    }).
+    filter("vfmt", ["$filter", function($filter) {
+        return $filter("vsprintf")
+    }])
diff --git a/tools/doc/node_modules/sprintf-js/src/sprintf.js b/tools/doc/node_modules/sprintf-js/src/sprintf.js
new file mode 100644
index 00000000000000..c0fc7c08b2e6fe
--- /dev/null
+++ b/tools/doc/node_modules/sprintf-js/src/sprintf.js
@@ -0,0 +1,208 @@
+(function(window) {
+    var re = {
+        not_string: /[^s]/,
+        number: /[diefg]/,
+        json: /[j]/,
+        not_json: /[^j]/,
+        text: /^[^\x25]+/,
+        modulo: /^\x25{2}/,
+        placeholder: /^\x25(?:([1-9]\d*)\$|\(([^\)]+)\))?(\+)?(0|'[^$])?(-)?(\d+)?(?:\.(\d+))?([b-gijosuxX])/,
+        key: /^([a-z_][a-z_\d]*)/i,
+        key_access: /^\.([a-z_][a-z_\d]*)/i,
+        index_access: /^\[(\d+)\]/,
+        sign: /^[\+\-]/
+    }
+
+    function sprintf() {
+        var key = arguments[0], cache = sprintf.cache
+        if (!(cache[key] && cache.hasOwnProperty(key))) {
+            cache[key] = sprintf.parse(key)
+        }
+        return sprintf.format.call(null, cache[key], arguments)
+    }
+
+    sprintf.format = function(parse_tree, argv) {
+        var cursor = 1, tree_length = parse_tree.length, node_type = "", arg, output = [], i, k, match, pad, pad_character, pad_length, is_positive = true, sign = ""
+        for (i = 0; i < tree_length; i++) {
+            node_type = get_type(parse_tree[i])
+            if (node_type === "string") {
+                output[output.length] = parse_tree[i]
+            }
+            else if (node_type === "array") {
+                match = parse_tree[i] // convenience purposes only
+                if (match[2]) { // keyword argument
+                    arg = argv[cursor]
+                    for (k = 0; k < match[2].length; k++) {
+                        if (!arg.hasOwnProperty(match[2][k])) {
+                            throw new Error(sprintf("[sprintf] property '%s' does not exist", match[2][k]))
+                        }
+                        arg = arg[match[2][k]]
+                    }
+                }
+                else if (match[1]) { // positional argument (explicit)
+                    arg = argv[match[1]]
+                }
+                else { // positional argument (implicit)
+                    arg = argv[cursor++]
+                }
+
+                if (get_type(arg) == "function") {
+                    arg = arg()
+                }
+
+                if (re.not_string.test(match[8]) && re.not_json.test(match[8]) && (get_type(arg) != "number" && isNaN(arg))) {
+                    throw new TypeError(sprintf("[sprintf] expecting number but found %s", get_type(arg)))
+                }
+
+                if (re.number.test(match[8])) {
+                    is_positive = arg >= 0
+                }
+
+                switch (match[8]) {
+                    case "b":
+                        arg = arg.toString(2)
+                    break
+                    case "c":
+                        arg = String.fromCharCode(arg)
+                    break
+                    case "d":
+                    case "i":
+                        arg = parseInt(arg, 10)
+                    break
+                    case "j":
+                        arg = JSON.stringify(arg, null, match[6] ? parseInt(match[6]) : 0)
+                    break
+                    case "e":
+                        arg = match[7] ? arg.toExponential(match[7]) : arg.toExponential()
+                    break
+                    case "f":
+                        arg = match[7] ? parseFloat(arg).toFixed(match[7]) : parseFloat(arg)
+                    break
+                    case "g":
+                        arg = match[7] ? parseFloat(arg).toPrecision(match[7]) : parseFloat(arg)
+                    break
+                    case "o":
+                        arg = arg.toString(8)
+                    break
+                    case "s":
+                        arg = ((arg = String(arg)) && match[7] ? arg.substring(0, match[7]) : arg)
+                    break
+                    case "u":
+                        arg = arg >>> 0
+                    break
+                    case "x":
+                        arg = arg.toString(16)
+                    break
+                    case "X":
+                        arg = arg.toString(16).toUpperCase()
+                    break
+                }
+                if (re.json.test(match[8])) {
+                    output[output.length] = arg
+                }
+                else {
+                    if (re.number.test(match[8]) && (!is_positive || match[3])) {
+                        sign = is_positive ? "+" : "-"
+                        arg = arg.toString().replace(re.sign, "")
+                    }
+                    else {
+                        sign = ""
+                    }
+                    pad_character = match[4] ? match[4] === "0" ? "0" : match[4].charAt(1) : " "
+                    pad_length = match[6] - (sign + arg).length
+                    pad = match[6] ? (pad_length > 0 ? str_repeat(pad_character, pad_length) : "") : ""
+                    output[output.length] = match[5] ? sign + arg + pad : (pad_character === "0" ? sign + pad + arg : pad + sign + arg)
+                }
+            }
+        }
+        return output.join("")
+    }
+
+    sprintf.cache = {}
+
+    sprintf.parse = function(fmt) {
+        var _fmt = fmt, match = [], parse_tree = [], arg_names = 0
+        while (_fmt) {
+            if ((match = re.text.exec(_fmt)) !== null) {
+                parse_tree[parse_tree.length] = match[0]
+            }
+            else if ((match = re.modulo.exec(_fmt)) !== null) {
+                parse_tree[parse_tree.length] = "%"
+            }
+            else if ((match = re.placeholder.exec(_fmt)) !== null) {
+                if (match[2]) {
+                    arg_names |= 1
+                    var field_list = [], replacement_field = match[2], field_match = []
+                    if ((field_match = re.key.exec(replacement_field)) !== null) {
+                        field_list[field_list.length] = field_match[1]
+                        while ((replacement_field = replacement_field.substring(field_match[0].length)) !== "") {
+                            if ((field_match = re.key_access.exec(replacement_field)) !== null) {
+                                field_list[field_list.length] = field_match[1]
+                            }
+                            else if ((field_match = re.index_access.exec(replacement_field)) !== null) {
+                                field_list[field_list.length] = field_match[1]
+                            }
+                            else {
+                                throw new SyntaxError("[sprintf] failed to parse named argument key")
+                            }
+                        }
+                    }
+                    else {
+                        throw new SyntaxError("[sprintf] failed to parse named argument key")
+                    }
+                    match[2] = field_list
+                }
+                else {
+                    arg_names |= 2
+                }
+                if (arg_names === 3) {
+                    throw new Error("[sprintf] mixing positional and named placeholders is not (yet) supported")
+                }
+                parse_tree[parse_tree.length] = match
+            }
+            else {
+                throw new SyntaxError("[sprintf] unexpected placeholder")
+            }
+            _fmt = _fmt.substring(match[0].length)
+        }
+        return parse_tree
+    }
+
+    var vsprintf = function(fmt, argv, _argv) {
+        _argv = (argv || []).slice(0)
+        _argv.splice(0, 0, fmt)
+        return sprintf.apply(null, _argv)
+    }
+
+    /**
+     * helpers
+     */
+    function get_type(variable) {
+        return Object.prototype.toString.call(variable).slice(8, -1).toLowerCase()
+    }
+
+    function str_repeat(input, multiplier) {
+        return Array(multiplier + 1).join(input)
+    }
+
+    /**
+     * export to either browser or node.js
+     */
+    if (typeof exports !== "undefined") {
+        exports.sprintf = sprintf
+        exports.vsprintf = vsprintf
+    }
+    else {
+        window.sprintf = sprintf
+        window.vsprintf = vsprintf
+
+        if (typeof define === "function" && define.amd) {
+            define(function() {
+                return {
+                    sprintf: sprintf,
+                    vsprintf: vsprintf
+                }
+            })
+        }
+    }
+})(typeof window === "undefined" ? this : window);
diff --git a/tools/doc/node_modules/sprintf-js/test/test.js b/tools/doc/node_modules/sprintf-js/test/test.js
new file mode 100644
index 00000000000000..6f57b2538c8522
--- /dev/null
+++ b/tools/doc/node_modules/sprintf-js/test/test.js
@@ -0,0 +1,82 @@
+var assert = require("assert"),
+    sprintfjs = require("../src/sprintf.js"),
+    sprintf = sprintfjs.sprintf,
+    vsprintf = sprintfjs.vsprintf
+
+describe("sprintfjs", function() {
+    var pi = 3.141592653589793
+
+    it("should return formated strings for simple placeholders", function() {
+        assert.equal("%", sprintf("%%"))
+        assert.equal("10", sprintf("%b", 2))
+        assert.equal("A", sprintf("%c", 65))
+        assert.equal("2", sprintf("%d", 2))
+        assert.equal("2", sprintf("%i", 2))
+        assert.equal("2", sprintf("%d", "2"))
+        assert.equal("2", sprintf("%i", "2"))
+        assert.equal('{"foo":"bar"}', sprintf("%j", {foo: "bar"}))
+        assert.equal('["foo","bar"]', sprintf("%j", ["foo", "bar"]))
+        assert.equal("2e+0", sprintf("%e", 2))
+        assert.equal("2", sprintf("%u", 2))
+        assert.equal("4294967294", sprintf("%u", -2))
+        assert.equal("2.2", sprintf("%f", 2.2))
+        assert.equal("3.141592653589793", sprintf("%g", pi))
+        assert.equal("10", sprintf("%o", 8))
+        assert.equal("%s", sprintf("%s", "%s"))
+        assert.equal("ff", sprintf("%x", 255))
+        assert.equal("FF", sprintf("%X", 255))
+        assert.equal("Polly wants a cracker", sprintf("%2$s %3$s a %1$s", "cracker", "Polly", "wants"))
+        assert.equal("Hello world!", sprintf("Hello %(who)s!", {"who": "world"}))
+    })
+
+    it("should return formated strings for complex placeholders", function() {
+        // sign
+        assert.equal("2", sprintf("%d", 2))
+        assert.equal("-2", sprintf("%d", -2))
+        assert.equal("+2", sprintf("%+d", 2))
+        assert.equal("-2", sprintf("%+d", -2))
+        assert.equal("2", sprintf("%i", 2))
+        assert.equal("-2", sprintf("%i", -2))
+        assert.equal("+2", sprintf("%+i", 2))
+        assert.equal("-2", sprintf("%+i", -2))
+        assert.equal("2.2", sprintf("%f", 2.2))
+        assert.equal("-2.2", sprintf("%f", -2.2))
+        assert.equal("+2.2", sprintf("%+f", 2.2))
+        assert.equal("-2.2", sprintf("%+f", -2.2))
+        assert.equal("-2.3", sprintf("%+.1f", -2.34))
+        assert.equal("-0.0", sprintf("%+.1f", -0.01))
+        assert.equal("3.14159", sprintf("%.6g", pi))
+        assert.equal("3.14", sprintf("%.3g", pi))
+        assert.equal("3", sprintf("%.1g", pi))
+        assert.equal("-000000123", sprintf("%+010d", -123))
+        assert.equal("______-123", sprintf("%+'_10d", -123))
+        assert.equal("-234.34 123.2", sprintf("%f %f", -234.34, 123.2))
+
+        // padding
+        assert.equal("-0002", sprintf("%05d", -2))
+        assert.equal("-0002", sprintf("%05i", -2))
+        assert.equal("    <", sprintf("%5s", "<"))
+        assert.equal("0000<", sprintf("%05s", "<"))
+        assert.equal("____<", sprintf("%'_5s", "<"))
+        assert.equal(">    ", sprintf("%-5s", ">"))
+        assert.equal(">0000", sprintf("%0-5s", ">"))
+        assert.equal(">____", sprintf("%'_-5s", ">"))
+        assert.equal("xxxxxx", sprintf("%5s", "xxxxxx"))
+        assert.equal("1234", sprintf("%02u", 1234))
+        assert.equal(" -10.235", sprintf("%8.3f", -10.23456))
+        assert.equal("-12.34 xxx", sprintf("%f %s", -12.34, "xxx"))
+        assert.equal('{\n  "foo": "bar"\n}', sprintf("%2j", {foo: "bar"}))
+        assert.equal('[\n  "foo",\n  "bar"\n]', sprintf("%2j", ["foo", "bar"]))
+
+        // precision
+        assert.equal("2.3", sprintf("%.1f", 2.345))
+        assert.equal("xxxxx", sprintf("%5.5s", "xxxxxx"))
+        assert.equal("    x", sprintf("%5.1s", "xxxxxx"))
+
+    })
+
+    it("should return formated strings for callbacks", function() {
+        assert.equal("foobar", sprintf("%s", function() { return "foobar" }))
+        assert.equal(Date.now(), sprintf("%s", Date.now)) // should pass...
+    })
+})