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+// Copyright 2006 The Closure Library Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS-IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+/**
+ * @fileoverview Bootstrap for the Google JS Library (Closure).
+ *
+ * In uncompiled mode base.js will attempt to load Closure's deps file, unless
+ * the global <code>CLOSURE_NO_DEPS</code> is set to true. This allows projects
+ * to include their own deps file(s) from different locations.
+ *
+ * Avoid including base.js more than once. This is strictly discouraged and not
+ * supported. goog.require(...) won't work properly in that case.
+ *
+ * @provideGoog
+ */
+
+
+/**
+ * @define {boolean} Overridden to true by the compiler.
+ */
+var COMPILED = false;
+
+
+/**
+ * Base namespace for the Closure library. Checks to see goog is already
+ * defined in the current scope before assigning to prevent clobbering if
+ * base.js is loaded more than once.
+ *
+ * @const
+ */
+var goog = goog || {};
+
+
+/**
+ * Reference to the global context. In most cases this will be 'window'.
+ */
+goog.global = this;
+
+
+/**
+ * A hook for overriding the define values in uncompiled mode.
+ *
+ * In uncompiled mode, {@code CLOSURE_UNCOMPILED_DEFINES} may be defined before
+ * loading base.js. If a key is defined in {@code CLOSURE_UNCOMPILED_DEFINES},
+ * {@code goog.define} will use the value instead of the default value. This
+ * allows flags to be overwritten without compilation (this is normally
+ * accomplished with the compiler's "define" flag).
+ *
+ * Example:
+ * <pre>
+ * var CLOSURE_UNCOMPILED_DEFINES = {'goog.DEBUG': false};
+ * </pre>
+ *
+ * @type {Object<string, (string|number|boolean)>|undefined}
+ */
+goog.global.CLOSURE_UNCOMPILED_DEFINES;
+
+
+/**
+ * A hook for overriding the define values in uncompiled or compiled mode,
+ * like CLOSURE_UNCOMPILED_DEFINES but effective in compiled code. In
+ * uncompiled code CLOSURE_UNCOMPILED_DEFINES takes precedence.
+ *
+ * Also unlike CLOSURE_UNCOMPILED_DEFINES the values must be number, boolean or
+ * string literals or the compiler will emit an error.
+ *
+ * While any @define value may be set, only those set with goog.define will be
+ * effective for uncompiled code.
+ *
+ * Example:
+ * <pre>
+ * var CLOSURE_DEFINES = {'goog.DEBUG': false} ;
+ * </pre>
+ *
+ * @type {Object<string, (string|number|boolean)>|undefined}
+ */
+goog.global.CLOSURE_DEFINES;
+
+
+/**
+ * Returns true if the specified value is not undefined.
+ *
+ * @param {?} val Variable to test.
+ * @return {boolean} Whether variable is defined.
+ */
+goog.isDef = function(val) {
+ // void 0 always evaluates to undefined and hence we do not need to depend on
+ // the definition of the global variable named 'undefined'.
+ return val !== void 0;
+};
+
+/**
+ * Returns true if the specified value is a string.
+ * @param {?} val Variable to test.
+ * @return {boolean} Whether variable is a string.
+ */
+goog.isString = function(val) {
+ return typeof val == 'string';
+};
+
+
+/**
+ * Returns true if the specified value is a boolean.
+ * @param {?} val Variable to test.
+ * @return {boolean} Whether variable is boolean.
+ */
+goog.isBoolean = function(val) {
+ return typeof val == 'boolean';
+};
+
+
+/**
+ * Returns true if the specified value is a number.
+ * @param {?} val Variable to test.
+ * @return {boolean} Whether variable is a number.
+ */
+goog.isNumber = function(val) {
+ return typeof val == 'number';
+};
+
+
+/**
+ * Builds an object structure for the provided namespace path, ensuring that
+ * names that already exist are not overwritten. For example:
+ * "a.b.c" -> a = {};a.b={};a.b.c={};
+ * Used by goog.provide and goog.exportSymbol.
+ * @param {string} name name of the object that this file defines.
+ * @param {*=} opt_object the object to expose at the end of the path.
+ * @param {Object=} opt_objectToExportTo The object to add the path to; default
+ * is `goog.global`.
+ * @private
+ */
+goog.exportPath_ = function(name, opt_object, opt_objectToExportTo) {
+ var parts = name.split('.');
+ var cur = opt_objectToExportTo || goog.global;
+
+ // Internet Explorer exhibits strange behavior when throwing errors from
+ // methods externed in this manner. See the testExportSymbolExceptions in
+ // base_test.html for an example.
+ if (!(parts[0] in cur) && cur.execScript) {
+ cur.execScript('var ' + parts[0]);
+ }
+
+ for (var part; parts.length && (part = parts.shift());) {
+ if (!parts.length && goog.isDef(opt_object)) {
+ // last part and we have an object; use it
+ cur[part] = opt_object;
+ } else if (cur[part] && cur[part] !== Object.prototype[part]) {
+ cur = cur[part];
+ } else {
+ cur = cur[part] = {};
+ }
+ }
+};
+
+
+/**
+ * Defines a named value. In uncompiled mode, the value is retrieved from
+ * CLOSURE_DEFINES or CLOSURE_UNCOMPILED_DEFINES if the object is defined and
+ * has the property specified, and otherwise used the defined defaultValue.
+ * When compiled the default can be overridden using the compiler
+ * options or the value set in the CLOSURE_DEFINES object.
+ *
+ * @param {string} name The distinguished name to provide.
+ * @param {string|number|boolean} defaultValue
+ */
+goog.define = function(name, defaultValue) {
+ var value = defaultValue;
+ if (!COMPILED) {
+ if (goog.global.CLOSURE_UNCOMPILED_DEFINES &&
+ // Anti DOM-clobbering runtime check (b/37736576).
+ /** @type {?} */ (goog.global.CLOSURE_UNCOMPILED_DEFINES).nodeType ===
+ undefined &&
+ Object.prototype.hasOwnProperty.call(
+ goog.global.CLOSURE_UNCOMPILED_DEFINES, name)) {
+ value = goog.global.CLOSURE_UNCOMPILED_DEFINES[name];
+ } else if (
+ goog.global.CLOSURE_DEFINES &&
+ // Anti DOM-clobbering runtime check (b/37736576).
+ /** @type {?} */ (goog.global.CLOSURE_DEFINES).nodeType === undefined &&
+ Object.prototype.hasOwnProperty.call(
+ goog.global.CLOSURE_DEFINES, name)) {
+ value = goog.global.CLOSURE_DEFINES[name];
+ }
+ }
+ goog.exportPath_(name, value);
+};
+
+
+/**
+ * @define {boolean} DEBUG is provided as a convenience so that debugging code
+ * that should not be included in a production. It can be easily stripped
+ * by specifying --define goog.DEBUG=false to the Closure Compiler aka
+ * JSCompiler. For example, most toString() methods should be declared inside an
+ * "if (goog.DEBUG)" conditional because they are generally used for debugging
+ * purposes and it is difficult for the JSCompiler to statically determine
+ * whether they are used.
+ */
+goog.define('goog.DEBUG', true);
+
+
+/**
+ * @define {string} LOCALE defines the locale being used for compilation. It is
+ * used to select locale specific data to be compiled in js binary. BUILD rule
+ * can specify this value by "--define goog.LOCALE=<locale_name>" as a compiler
+ * option.
+ *
+ * Take into account that the locale code format is important. You should use
+ * the canonical Unicode format with hyphen as a delimiter. Language must be
+ * lowercase, Language Script - Capitalized, Region - UPPERCASE.
+ * There are few examples: pt-BR, en, en-US, sr-Latin-BO, zh-Hans-CN.
+ *
+ * See more info about locale codes here:
+ * http://www.unicode.org/reports/tr35/#Unicode_Language_and_Locale_Identifiers
+ *
+ * For language codes you should use values defined by ISO 693-1. See it here
+ * http://www.w3.org/WAI/ER/IG/ert/iso639.htm. There is only one exception from
+ * this rule: the Hebrew language. For legacy reasons the old code (iw) should
+ * be used instead of the new code (he).
+ *
+ */
+goog.define('goog.LOCALE', 'en'); // default to en
+
+
+/**
+ * @define {boolean} Whether this code is running on trusted sites.
+ *
+ * On untrusted sites, several native functions can be defined or overridden by
+ * external libraries like Prototype, Datejs, and JQuery and setting this flag
+ * to false forces closure to use its own implementations when possible.
+ *
+ * If your JavaScript can be loaded by a third party site and you are wary about
+ * relying on non-standard implementations, specify
+ * "--define goog.TRUSTED_SITE=false" to the compiler.
+ */
+goog.define('goog.TRUSTED_SITE', true);
+
+
+/**
+ * @define {boolean} Whether a project is expected to be running in strict mode.
+ *
+ * This define can be used to trigger alternate implementations compatible with
+ * running in EcmaScript Strict mode or warn about unavailable functionality.
+ * @see https://goo.gl/PudQ4y
+ *
+ */
+goog.define('goog.STRICT_MODE_COMPATIBLE', false);
+
+
+/**
+ * @define {boolean} Whether code that calls {@link goog.setTestOnly} should
+ * be disallowed in the compilation unit.
+ */
+goog.define('goog.DISALLOW_TEST_ONLY_CODE', COMPILED && !goog.DEBUG);
+
+
+/**
+ * @define {boolean} Whether to use a Chrome app CSP-compliant method for
+ * loading scripts via goog.require. @see appendScriptSrcNode_.
+ */
+goog.define('goog.ENABLE_CHROME_APP_SAFE_SCRIPT_LOADING', false);
+
+
+/**
+ * Defines a namespace in Closure.
+ *
+ * A namespace may only be defined once in a codebase. It may be defined using
+ * goog.provide() or goog.module().
+ *
+ * The presence of one or more goog.provide() calls in a file indicates
+ * that the file defines the given objects/namespaces.
+ * Provided symbols must not be null or undefined.
+ *
+ * In addition, goog.provide() creates the object stubs for a namespace
+ * (for example, goog.provide("goog.foo.bar") will create the object
+ * goog.foo.bar if it does not already exist).
+ *
+ * Build tools also scan for provide/require/module statements
+ * to discern dependencies, build dependency files (see deps.js), etc.
+ *
+ * @see goog.require
+ * @see goog.module
+ * @param {string} name Namespace provided by this file in the form
+ * "goog.package.part".
+ */
+goog.provide = function(name) {
+ if (goog.isInModuleLoader_()) {
+ throw Error('goog.provide can not be used within a goog.module.');
+ }
+ if (!COMPILED) {
+ // Ensure that the same namespace isn't provided twice.
+ // A goog.module/goog.provide maps a goog.require to a specific file
+ if (goog.isProvided_(name)) {
+ throw Error('Namespace "' + name + '" already declared.');
+ }
+ }
+
+ goog.constructNamespace_(name);
+};
+
+
+/**
+ * @param {string} name Namespace provided by this file in the form
+ * "goog.package.part".
+ * @param {Object=} opt_obj The object to embed in the namespace.
+ * @private
+ */
+goog.constructNamespace_ = function(name, opt_obj) {
+ if (!COMPILED) {
+ delete goog.implicitNamespaces_[name];
+
+ var namespace = name;
+ while ((namespace = namespace.substring(0, namespace.lastIndexOf('.')))) {
+ if (goog.getObjectByName(namespace)) {
+ break;
+ }
+ goog.implicitNamespaces_[namespace] = true;
+ }
+ }
+
+ goog.exportPath_(name, opt_obj);
+};
+
+
+/**
+ * Module identifier validation regexp.
+ * Note: This is a conservative check, it is very possible to be more lenient,
+ * the primary exclusion here is "/" and "\" and a leading ".", these
+ * restrictions are intended to leave the door open for using goog.require
+ * with relative file paths rather than module identifiers.
+ * @private
+ */
+goog.VALID_MODULE_RE_ = /^[a-zA-Z_$][a-zA-Z0-9._$]*$/;
+
+
+/**
+ * Defines a module in Closure.
+ *
+ * Marks that this file must be loaded as a module and claims the namespace.
+ *
+ * A namespace may only be defined once in a codebase. It may be defined using
+ * goog.provide() or goog.module().
+ *
+ * goog.module() has three requirements:
+ * - goog.module may not be used in the same file as goog.provide.
+ * - goog.module must be the first statement in the file.
+ * - only one goog.module is allowed per file.
+ *
+ * When a goog.module annotated file is loaded, it is enclosed in
+ * a strict function closure. This means that:
+ * - any variables declared in a goog.module file are private to the file
+ * (not global), though the compiler is expected to inline the module.
+ * - The code must obey all the rules of "strict" JavaScript.
+ * - the file will be marked as "use strict"
+ *
+ * NOTE: unlike goog.provide, goog.module does not declare any symbols by
+ * itself. If declared symbols are desired, use
+ * goog.module.declareLegacyNamespace().
+ *
+ *
+ * See the public goog.module proposal: http://goo.gl/Va1hin
+ *
+ * @param {string} name Namespace provided by this file in the form
+ * "goog.package.part", is expected but not required.
+ * @return {void}
+ */
+goog.module = function(name) {
+ if (!goog.isString(name) || !name ||
+ name.search(goog.VALID_MODULE_RE_) == -1) {
+ throw Error('Invalid module identifier');
+ }
+ if (!goog.isInModuleLoader_()) {
+ throw Error(
+ 'Module ' + name + ' has been loaded incorrectly. Note, ' +
+ 'modules cannot be loaded as normal scripts. They require some kind of ' +
+ 'pre-processing step. You\'re likely trying to load a module via a ' +
+ 'script tag or as a part of a concatenated bundle without rewriting the ' +
+ 'module. For more info see: ' +
+ 'https://github.com/google/closure-library/wiki/goog.module:-an-ES6-module-like-alternative-to-goog.provide.');
+ }
+ if (goog.moduleLoaderState_.moduleName) {
+ throw Error('goog.module may only be called once per module.');
+ }
+
+ // Store the module name for the loader.
+ goog.moduleLoaderState_.moduleName = name;
+ if (!COMPILED) {
+ // Ensure that the same namespace isn't provided twice.
+ // A goog.module/goog.provide maps a goog.require to a specific file
+ if (goog.isProvided_(name)) {
+ throw Error('Namespace "' + name + '" already declared.');
+ }
+ delete goog.implicitNamespaces_[name];
+ }
+};
+
+
+/**
+ * @param {string} name The module identifier.
+ * @return {?} The module exports for an already loaded module or null.
+ *
+ * Note: This is not an alternative to goog.require, it does not
+ * indicate a hard dependency, instead it is used to indicate
+ * an optional dependency or to access the exports of a module
+ * that has already been loaded.
+ * @suppress {missingProvide}
+ */
+goog.module.get = function(name) {
+ return goog.module.getInternal_(name);
+};
+
+
+/**
+ * @param {string} name The module identifier.
+ * @return {?} The module exports for an already loaded module or null.
+ * @private
+ */
+goog.module.getInternal_ = function(name) {
+ if (!COMPILED) {
+ if (name in goog.loadedModules_) {
+ return goog.loadedModules_[name];
+ } else if (!goog.implicitNamespaces_[name]) {
+ var ns = goog.getObjectByName(name);
+ return ns != null ? ns : null;
+ }
+ }
+ return null;
+};
+
+
+/**
+ * @private {?{moduleName: (string|undefined), declareLegacyNamespace:boolean}}
+ */
+goog.moduleLoaderState_ = null;
+
+
+/**
+ * @private
+ * @return {boolean} Whether a goog.module is currently being initialized.
+ */
+goog.isInModuleLoader_ = function() {
+ return goog.moduleLoaderState_ != null;
+};
+
+
+/**
+ * Provide the module's exports as a globally accessible object under the
+ * module's declared name. This is intended to ease migration to goog.module
+ * for files that have existing usages.
+ * @suppress {missingProvide}
+ */
+goog.module.declareLegacyNamespace = function() {
+ if (!COMPILED && !goog.isInModuleLoader_()) {
+ throw new Error(
+ 'goog.module.declareLegacyNamespace must be called from ' +
+ 'within a goog.module');
+ }
+ if (!COMPILED && !goog.moduleLoaderState_.moduleName) {
+ throw Error(
+ 'goog.module must be called prior to ' +
+ 'goog.module.declareLegacyNamespace.');
+ }
+ goog.moduleLoaderState_.declareLegacyNamespace = true;
+};
+
+
+/**
+ * Marks that the current file should only be used for testing, and never for
+ * live code in production.
+ *
+ * In the case of unit tests, the message may optionally be an exact namespace
+ * for the test (e.g. 'goog.stringTest'). The linter will then ignore the extra
+ * provide (if not explicitly defined in the code).
+ *
+ * @param {string=} opt_message Optional message to add to the error that's
+ * raised when used in production code.
+ */
+goog.setTestOnly = function(opt_message) {
+ if (goog.DISALLOW_TEST_ONLY_CODE) {
+ opt_message = opt_message || '';
+ throw Error(
+ 'Importing test-only code into non-debug environment' +
+ (opt_message ? ': ' + opt_message : '.'));
+ }
+};
+
+
+/**
+ * Forward declares a symbol. This is an indication to the compiler that the
+ * symbol may be used in the source yet is not required and may not be provided
+ * in compilation.
+ *
+ * The most common usage of forward declaration is code that takes a type as a
+ * function parameter but does not need to require it. By forward declaring
+ * instead of requiring, no hard dependency is made, and (if not required
+ * elsewhere) the namespace may never be required and thus, not be pulled
+ * into the JavaScript binary. If it is required elsewhere, it will be type
+ * checked as normal.
+ *
+ * Before using goog.forwardDeclare, please read the documentation at
+ * https://github.com/google/closure-compiler/wiki/Bad-Type-Annotation to
+ * understand the options and tradeoffs when working with forward declarations.
+ *
+ * @param {string} name The namespace to forward declare in the form of
+ * "goog.package.part".
+ */
+goog.forwardDeclare = function(name) {};
+
+
+/**
+ * Forward declare type information. Used to assign types to goog.global
+ * referenced object that would otherwise result in unknown type references
+ * and thus block property disambiguation.
+ */
+goog.forwardDeclare('Document');
+goog.forwardDeclare('HTMLScriptElement');
+goog.forwardDeclare('XMLHttpRequest');
+
+
+if (!COMPILED) {
+ /**
+ * Check if the given name has been goog.provided. This will return false for
+ * names that are available only as implicit namespaces.
+ * @param {string} name name of the object to look for.
+ * @return {boolean} Whether the name has been provided.
+ * @private
+ */
+ goog.isProvided_ = function(name) {
+ return (name in goog.loadedModules_) ||
+ (!goog.implicitNamespaces_[name] &&
+ goog.isDefAndNotNull(goog.getObjectByName(name)));
+ };
+
+ /**
+ * Namespaces implicitly defined by goog.provide. For example,
+ * goog.provide('goog.events.Event') implicitly declares that 'goog' and
+ * 'goog.events' must be namespaces.
+ *
+ * @type {!Object<string, (boolean|undefined)>}
+ * @private
+ */
+ goog.implicitNamespaces_ = {'goog.module': true};
+
+ // NOTE: We add goog.module as an implicit namespace as goog.module is defined
+ // here and because the existing module package has not been moved yet out of
+ // the goog.module namespace. This satisifies both the debug loader and
+ // ahead-of-time dependency management.
+}
+
+
+/**
+ * Returns an object based on its fully qualified external name. The object
+ * is not found if null or undefined. If you are using a compilation pass that
+ * renames property names beware that using this function will not find renamed
+ * properties.
+ *
+ * @param {string} name The fully qualified name.
+ * @param {Object=} opt_obj The object within which to look; default is
+ * |goog.global|.
+ * @return {?} The value (object or primitive) or, if not found, null.
+ */
+goog.getObjectByName = function(name, opt_obj) {
+ var parts = name.split('.');
+ var cur = opt_obj || goog.global;
+ for (var part; part = parts.shift();) {
+ if (goog.isDefAndNotNull(cur[part])) {
+ cur = cur[part];
+ } else {
+ return null;
+ }
+ }
+ return cur;
+};
+
+
+/**
+ * Globalizes a whole namespace, such as goog or goog.lang.
+ *
+ * @param {!Object} obj The namespace to globalize.
+ * @param {Object=} opt_global The object to add the properties to.
+ * @deprecated Properties may be explicitly exported to the global scope, but
+ * this should no longer be done in bulk.
+ */
+goog.globalize = function(obj, opt_global) {
+ var global = opt_global || goog.global;
+ for (var x in obj) {
+ global[x] = obj[x];
+ }
+};
+
+
+/**
+ * Adds a dependency from a file to the files it requires.
+ * @param {string} relPath The path to the js file.
+ * @param {!Array<string>} provides An array of strings with
+ * the names of the objects this file provides.
+ * @param {!Array<string>} requires An array of strings with
+ * the names of the objects this file requires.
+ * @param {boolean|!Object<string>=} opt_loadFlags Parameters indicating
+ * how the file must be loaded. The boolean 'true' is equivalent
+ * to {'module': 'goog'} for backwards-compatibility. Valid properties
+ * and values include {'module': 'goog'} and {'lang': 'es6'}.
+ */
+goog.addDependency = function(relPath, provides, requires, opt_loadFlags) {
+ if (goog.DEPENDENCIES_ENABLED) {
+ var provide, require;
+ var path = relPath.replace(/\\/g, '/');
+ var deps = goog.dependencies_;
+ if (!opt_loadFlags || typeof opt_loadFlags === 'boolean') {
+ opt_loadFlags = opt_loadFlags ? {'module': 'goog'} : {};
+ }
+ for (var i = 0; provide = provides[i]; i++) {
+ deps.nameToPath[provide] = path;
+ deps.loadFlags[path] = opt_loadFlags;
+ }
+ for (var j = 0; require = requires[j]; j++) {
+ if (!(path in deps.requires)) {
+ deps.requires[path] = {};
+ }
+ deps.requires[path][require] = true;
+ }
+ }
+};
+
+
+
+
+// NOTE(nnaze): The debug DOM loader was included in base.js as an original way
+// to do "debug-mode" development. The dependency system can sometimes be
+// confusing, as can the debug DOM loader's asynchronous nature.
+//
+// With the DOM loader, a call to goog.require() is not blocking -- the script
+// will not load until some point after the current script. If a namespace is
+// needed at runtime, it needs to be defined in a previous script, or loaded via
+// require() with its registered dependencies.
+//
+// User-defined namespaces may need their own deps file. For a reference on
+// creating a deps file, see:
+// Externally: https://developers.google.com/closure/library/docs/depswriter
+//
+// Because of legacy clients, the DOM loader can't be easily removed from
+// base.js. Work was done to make it disableable or replaceable for
+// different environments (DOM-less JavaScript interpreters like Rhino or V8,
+// for example). See bootstrap/ for more information.
+
+
+/**
+ * @define {boolean} Whether to enable the debug loader.
+ *
+ * If enabled, a call to goog.require() will attempt to load the namespace by
+ * appending a script tag to the DOM (if the namespace has been registered).
+ *
+ * If disabled, goog.require() will simply assert that the namespace has been
+ * provided (and depend on the fact that some outside tool correctly ordered
+ * the script).
+ */
+goog.define('goog.ENABLE_DEBUG_LOADER', true);
+
+
+/**
+ * @param {string} msg
+ * @private
+ */
+goog.logToConsole_ = function(msg) {
+ if (goog.global.console) {
+ goog.global.console['error'](msg);
+ }
+};
+
+
+/**
+ * Implements a system for the dynamic resolution of dependencies that works in
+ * parallel with the BUILD system. Note that all calls to goog.require will be
+ * stripped by the compiler.
+ * @see goog.provide
+ * @param {string} name Namespace to include (as was given in goog.provide()) in
+ * the form "goog.package.part".
+ * @return {?} If called within a goog.module file, the associated namespace or
+ * module otherwise null.
+ */
+goog.require = function(name) {
+ // If the object already exists we do not need to do anything.
+ if (!COMPILED) {
+ if (goog.ENABLE_DEBUG_LOADER && goog.IS_OLD_IE_) {
+ goog.maybeProcessDeferredDep_(name);
+ }
+
+ if (goog.isProvided_(name)) {
+ if (goog.isInModuleLoader_()) {
+ return goog.module.getInternal_(name);
+ }
+ } else if (goog.ENABLE_DEBUG_LOADER) {
+ var path = goog.getPathFromDeps_(name);
+ if (path) {
+ goog.writeScripts_(path);
+ } else {
+ var errorMessage = 'goog.require could not find: ' + name;
+ goog.logToConsole_(errorMessage);
+
+ throw Error(errorMessage);
+ }
+ }
+
+ return null;
+ }
+};
+
+
+/**
+ * Path for included scripts.
+ * @type {string}
+ */
+goog.basePath = '';
+
+
+/**
+ * A hook for overriding the base path.
+ * @type {string|undefined}
+ */
+goog.global.CLOSURE_BASE_PATH;
+
+
+/**
+ * Whether to attempt to load Closure's deps file. By default, when uncompiled,
+ * deps files will attempt to be loaded.
+ * @type {boolean|undefined}
+ */
+goog.global.CLOSURE_NO_DEPS;
+
+
+/**
+ * A function to import a single script. This is meant to be overridden when
+ * Closure is being run in non-HTML contexts, such as web workers. It's defined
+ * in the global scope so that it can be set before base.js is loaded, which
+ * allows deps.js to be imported properly.
+ *
+ * The function is passed the script source, which is a relative URI. It should
+ * return true if the script was imported, false otherwise.
+ * @type {(function(string): boolean)|undefined}
+ */
+goog.global.CLOSURE_IMPORT_SCRIPT;
+
+
+/**
+ * Null function used for default values of callbacks, etc.
+ * @return {void} Nothing.
+ */
+goog.nullFunction = function() {};
+
+
+/**
+ * When defining a class Foo with an abstract method bar(), you can do:
+ * Foo.prototype.bar = goog.abstractMethod
+ *
+ * Now if a subclass of Foo fails to override bar(), an error will be thrown
+ * when bar() is invoked.
+ *
+ * @type {!Function}
+ * @throws {Error} when invoked to indicate the method should be overridden.
+ */
+goog.abstractMethod = function() {
+ throw Error('unimplemented abstract method');
+};
+
+
+/**
+ * Adds a {@code getInstance} static method that always returns the same
+ * instance object.
+ * @param {!Function} ctor The constructor for the class to add the static
+ * method to.
+ */
+goog.addSingletonGetter = function(ctor) {
+ // instance_ is immediately set to prevent issues with sealed constructors
+ // such as are encountered when a constructor is returned as the export object
+ // of a goog.module in unoptimized code.
+ ctor.instance_ = undefined;
+ ctor.getInstance = function() {
+ if (ctor.instance_) {
+ return ctor.instance_;
+ }
+ if (goog.DEBUG) {
+ // NOTE: JSCompiler can't optimize away Array#push.
+ goog.instantiatedSingletons_[goog.instantiatedSingletons_.length] = ctor;
+ }
+ return ctor.instance_ = new ctor;
+ };
+};
+
+
+/**
+ * All singleton classes that have been instantiated, for testing. Don't read
+ * it directly, use the {@code goog.testing.singleton} module. The compiler
+ * removes this variable if unused.
+ * @type {!Array<!Function>}
+ * @private
+ */
+goog.instantiatedSingletons_ = [];
+
+
+/**
+ * @define {boolean} Whether to load goog.modules using {@code eval} when using
+ * the debug loader. This provides a better debugging experience as the
+ * source is unmodified and can be edited using Chrome Workspaces or similar.
+ * However in some environments the use of {@code eval} is banned
+ * so we provide an alternative.
+ */
+goog.define('goog.LOAD_MODULE_USING_EVAL', true);
+
+
+/**
+ * @define {boolean} Whether the exports of goog.modules should be sealed when
+ * possible.
+ */
+goog.define('goog.SEAL_MODULE_EXPORTS', goog.DEBUG);
+
+
+/**
+ * The registry of initialized modules:
+ * the module identifier to module exports map.
+ * @private @const {!Object<string, ?>}
+ */
+goog.loadedModules_ = {};
+
+
+/**
+ * True if goog.dependencies_ is available.
+ * @const {boolean}
+ */
+goog.DEPENDENCIES_ENABLED = !COMPILED && goog.ENABLE_DEBUG_LOADER;
+
+
+/**
+ * @define {string} How to decide whether to transpile. Valid values
+ * are 'always', 'never', and 'detect'. The default ('detect') is to
+ * use feature detection to determine which language levels need
+ * transpilation.
+ */
+// NOTE(user): we could expand this to accept a language level to bypass
+// detection: e.g. goog.TRANSPILE == 'es5' would transpile ES6 files but
+// would leave ES3 and ES5 files alone.
+goog.define('goog.TRANSPILE', 'detect');
+
+
+/**
+ * @define {string} Path to the transpiler. Executing the script at this
+ * path (relative to base.js) should define a function $jscomp.transpile.
+ */
+goog.define('goog.TRANSPILER', 'transpile.js');
+
+
+if (goog.DEPENDENCIES_ENABLED) {
+ /**
+ * This object is used to keep track of dependencies and other data that is
+ * used for loading scripts.
+ * @private
+ * @type {{
+ * loadFlags: !Object<string, !Object<string, string>>,
+ * nameToPath: !Object<string, string>,
+ * requires: !Object<string, !Object<string, boolean>>,
+ * visited: !Object<string, boolean>,
+ * written: !Object<string, boolean>,
+ * deferred: !Object<string, string>
+ * }}
+ */
+ goog.dependencies_ = {
+ loadFlags: {}, // 1 to 1
+
+ nameToPath: {}, // 1 to 1
+
+ requires: {}, // 1 to many
+
+ // Used when resolving dependencies to prevent us from visiting file twice.
+ visited: {},
+
+ written: {}, // Used to keep track of script files we have written.
+
+ deferred: {} // Used to track deferred module evaluations in old IEs
+ };
+
+
+ /**
+ * Tries to detect whether is in the context of an HTML document.
+ * @return {boolean} True if it looks like HTML document.
+ * @private
+ */
+ goog.inHtmlDocument_ = function() {
+ /** @type {Document} */
+ var doc = goog.global.document;
+ return doc != null && 'write' in doc; // XULDocument misses write.
+ };
+
+
+ /**
+ * Tries to detect the base path of base.js script that bootstraps Closure.
+ * @private
+ */
+ goog.findBasePath_ = function() {
+ if (goog.isDef(goog.global.CLOSURE_BASE_PATH) &&
+ // Anti DOM-clobbering runtime check (b/37736576).
+ goog.isString(goog.global.CLOSURE_BASE_PATH)) {
+ goog.basePath = goog.global.CLOSURE_BASE_PATH;
+ return;
+ } else if (!goog.inHtmlDocument_()) {
+ return;
+ }
+ /** @type {Document} */
+ var doc = goog.global.document;
+ // If we have a currentScript available, use it exclusively.
+ var currentScript = doc.currentScript;
+ if (currentScript) {
+ var scripts = [currentScript];
+ } else {
+ var scripts = doc.getElementsByTagName('SCRIPT');
+ }
+ // Search backwards since the current script is in almost all cases the one
+ // that has base.js.
+ for (var i = scripts.length - 1; i >= 0; --i) {
+ var script = /** @type {!HTMLScriptElement} */ (scripts[i]);
+ var src = script.src;
+ var qmark = src.lastIndexOf('?');
+ var l = qmark == -1 ? src.length : qmark;
+ if (src.substr(l - 7, 7) == 'base.js') {
+ goog.basePath = src.substr(0, l - 7);
+ return;
+ }
+ }
+ };
+
+
+ /**
+ * Imports a script if, and only if, that script hasn't already been imported.
+ * (Must be called at execution time)
+ * @param {string} src Script source.
+ * @param {string=} opt_sourceText The optionally source text to evaluate
+ * @private
+ */
+ goog.importScript_ = function(src, opt_sourceText) {
+ var importScript =
+ goog.global.CLOSURE_IMPORT_SCRIPT || goog.writeScriptTag_;
+ if (importScript(src, opt_sourceText)) {
+ goog.dependencies_.written[src] = true;
+ }
+ };
+
+
+ /**
+ * Whether the browser is IE9 or earlier, which needs special handling
+ * for deferred modules.
+ * @const @private {boolean}
+ */
+ goog.IS_OLD_IE_ =
+ !!(!goog.global.atob && goog.global.document && goog.global.document.all);
+
+
+ /**
+ * Whether IE9 or earlier is waiting on a dependency. This ensures that
+ * deferred modules that have no non-deferred dependencies actually get
+ * loaded, since if we defer them and then never pull in a non-deferred
+ * script, then `goog.loadQueuedModules_` will never be called. Instead,
+ * if not waiting on anything we simply don't defer in the first place.
+ * @private {boolean}
+ */
+ goog.oldIeWaiting_ = false;
+
+
+ /**
+ * Given a URL initiate retrieval and execution of a script that needs
+ * pre-processing.
+ * @param {string} src Script source URL.
+ * @param {boolean} isModule Whether this is a goog.module.
+ * @param {boolean} needsTranspile Whether this source needs transpilation.
+ * @private
+ */
+ goog.importProcessedScript_ = function(src, isModule, needsTranspile) {
+ // In an attempt to keep browsers from timing out loading scripts using
+ // synchronous XHRs, put each load in its own script block.
+ var bootstrap = 'goog.retrieveAndExec_("' + src + '", ' + isModule + ', ' +
+ needsTranspile + ');';
+
+ goog.importScript_('', bootstrap);
+ };
+
+
+ /** @private {!Array<string>} */
+ goog.queuedModules_ = [];
+
+
+ /**
+ * Return an appropriate module text. Suitable to insert into
+ * a script tag (that is unescaped).
+ * @param {string} srcUrl
+ * @param {string} scriptText
+ * @return {string}
+ * @private
+ */
+ goog.wrapModule_ = function(srcUrl, scriptText) {
+ if (!goog.LOAD_MODULE_USING_EVAL || !goog.isDef(goog.global.JSON)) {
+ return '' +
+ 'goog.loadModule(function(exports) {' +
+ '"use strict";' + scriptText +
+ '\n' + // terminate any trailing single line comment.
+ ';return exports' +
+ '});' +
+ '\n//# sourceURL=' + srcUrl + '\n';
+ } else {
+ return '' +
+ 'goog.loadModule(' +
+ goog.global.JSON.stringify(
+ scriptText + '\n//# sourceURL=' + srcUrl + '\n') +
+ ');';
+ }
+ };
+
+ // On IE9 and earlier, it is necessary to handle
+ // deferred module loads. In later browsers, the
+ // code to be evaluated is simply inserted as a script
+ // block in the correct order. To eval deferred
+ // code at the right time, we piggy back on goog.require to call
+ // goog.maybeProcessDeferredDep_.
+ //
+ // The goog.requires are used both to bootstrap
+ // the loading process (when no deps are available) and
+ // declare that they should be available.
+ //
+ // Here we eval the sources, if all the deps are available
+ // either already eval'd or goog.require'd. This will
+ // be the case when all the dependencies have already
+ // been loaded, and the dependent module is loaded.
+ //
+ // But this alone isn't sufficient because it is also
+ // necessary to handle the case where there is no root
+ // that is not deferred. For that there we register for an event
+ // and trigger goog.loadQueuedModules_ handle any remaining deferred
+ // evaluations.
+
+ /**
+ * Handle any remaining deferred goog.module evals.
+ * @private
+ */
+ goog.loadQueuedModules_ = function() {
+ var count = goog.queuedModules_.length;
+ if (count > 0) {
+ var queue = goog.queuedModules_;
+ goog.queuedModules_ = [];
+ for (var i = 0; i < count; i++) {
+ var path = queue[i];
+ goog.maybeProcessDeferredPath_(path);
+ }
+ }
+ goog.oldIeWaiting_ = false;
+ };
+
+
+ /**
+ * Eval the named module if its dependencies are
+ * available.
+ * @param {string} name The module to load.
+ * @private
+ */
+ goog.maybeProcessDeferredDep_ = function(name) {
+ if (goog.isDeferredModule_(name) && goog.allDepsAreAvailable_(name)) {
+ var path = goog.getPathFromDeps_(name);
+ goog.maybeProcessDeferredPath_(goog.basePath + path);
+ }
+ };
+
+ /**
+ * @param {string} name The module to check.
+ * @return {boolean} Whether the name represents a
+ * module whose evaluation has been deferred.
+ * @private
+ */
+ goog.isDeferredModule_ = function(name) {
+ var path = goog.getPathFromDeps_(name);
+ var loadFlags = path && goog.dependencies_.loadFlags[path] || {};
+ var languageLevel = loadFlags['lang'] || 'es3';
+ if (path && (loadFlags['module'] == 'goog' ||
+ goog.needsTranspile_(languageLevel))) {
+ var abspath = goog.basePath + path;
+ return (abspath) in goog.dependencies_.deferred;
+ }
+ return false;
+ };
+
+ /**
+ * @param {string} name The module to check.
+ * @return {boolean} Whether the name represents a
+ * module whose declared dependencies have all been loaded
+ * (eval'd or a deferred module load)
+ * @private
+ */
+ goog.allDepsAreAvailable_ = function(name) {
+ var path = goog.getPathFromDeps_(name);
+ if (path && (path in goog.dependencies_.requires)) {
+ for (var requireName in goog.dependencies_.requires[path]) {
+ if (!goog.isProvided_(requireName) &&
+ !goog.isDeferredModule_(requireName)) {
+ return false;
+ }
+ }
+ }
+ return true;
+ };
+
+
+ /**
+ * @param {string} abspath
+ * @private
+ */
+ goog.maybeProcessDeferredPath_ = function(abspath) {
+ if (abspath in goog.dependencies_.deferred) {
+ var src = goog.dependencies_.deferred[abspath];
+ delete goog.dependencies_.deferred[abspath];
+ goog.globalEval(src);
+ }
+ };
+
+
+ /**
+ * Load a goog.module from the provided URL. This is not a general purpose
+ * code loader and does not support late loading code, that is it should only
+ * be used during page load. This method exists to support unit tests and
+ * "debug" loaders that would otherwise have inserted script tags. Under the
+ * hood this needs to use a synchronous XHR and is not recommeneded for
+ * production code.
+ *
+ * The module's goog.requires must have already been satisified; an exception
+ * will be thrown if this is not the case. This assumption is that no
+ * "deps.js" file exists, so there is no way to discover and locate the
+ * module-to-be-loaded's dependencies and no attempt is made to do so.
+ *
+ * There should only be one attempt to load a module. If
+ * "goog.loadModuleFromUrl" is called for an already loaded module, an
+ * exception will be throw.
+ *
+ * @param {string} url The URL from which to attempt to load the goog.module.
+ */
+ goog.loadModuleFromUrl = function(url) {
+ // Because this executes synchronously, we don't need to do any additional
+ // bookkeeping. When "goog.loadModule" the namespace will be marked as
+ // having been provided which is sufficient.
+ goog.retrieveAndExec_(url, true, false);
+ };
+
+
+ /**
+ * Writes a new script pointing to {@code src} directly into the DOM.
+ *
+ * NOTE: This method is not CSP-compliant. @see goog.appendScriptSrcNode_ for
+ * the fallback mechanism.
+ *
+ * @param {string} src The script URL.
+ * @private
+ */
+ goog.writeScriptSrcNode_ = function(src) {
+ goog.global.document.write(
+ '<script type="text/javascript" src="' + src + '"></' +
+ 'script>');
+ };
+
+
+ /**
+ * Appends a new script node to the DOM using a CSP-compliant mechanism. This
+ * method exists as a fallback for document.write (which is not allowed in a
+ * strict CSP context, e.g., Chrome apps).
+ *
+ * NOTE: This method is not analogous to using document.write to insert a
+ * <script> tag; specifically, the user agent will execute a script added by
+ * document.write immediately after the current script block finishes
+ * executing, whereas the DOM-appended script node will not be executed until
+ * the entire document is parsed and executed. That is to say, this script is
+ * added to the end of the script execution queue.
+ *
+ * The page must not attempt to call goog.required entities until after the
+ * document has loaded, e.g., in or after the window.onload callback.
+ *
+ * @param {string} src The script URL.
+ * @private
+ */
+ goog.appendScriptSrcNode_ = function(src) {
+ /** @type {Document} */
+ var doc = goog.global.document;
+ var scriptEl =
+ /** @type {HTMLScriptElement} */ (doc.createElement('script'));
+ scriptEl.type = 'text/javascript';
+ scriptEl.src = src;
+ scriptEl.defer = false;
+ scriptEl.async = false;
+ doc.head.appendChild(scriptEl);
+ };
+
+
+ /**
+ * The default implementation of the import function. Writes a script tag to
+ * import the script.
+ *
+ * @param {string} src The script url.
+ * @param {string=} opt_sourceText The optionally source text to evaluate
+ * @return {boolean} True if the script was imported, false otherwise.
+ * @private
+ */
+ goog.writeScriptTag_ = function(src, opt_sourceText) {
+ if (goog.inHtmlDocument_()) {
+ /** @type {!HTMLDocument} */
+ var doc = goog.global.document;
+
+ // If the user tries to require a new symbol after document load,
+ // something has gone terribly wrong. Doing a document.write would
+ // wipe out the page. This does not apply to the CSP-compliant method
+ // of writing script tags.
+ if (!goog.ENABLE_CHROME_APP_SAFE_SCRIPT_LOADING &&
+ doc.readyState == 'complete') {
+ // Certain test frameworks load base.js multiple times, which tries
+ // to write deps.js each time. If that happens, just fail silently.
+ // These frameworks wipe the page between each load of base.js, so this
+ // is OK.
+ var isDeps = /\bdeps.js$/.test(src);
+ if (isDeps) {
+ return false;
+ } else {
+ throw Error('Cannot write "' + src + '" after document load');
+ }
+ }
+
+ if (opt_sourceText === undefined) {
+ if (!goog.IS_OLD_IE_) {
+ if (goog.ENABLE_CHROME_APP_SAFE_SCRIPT_LOADING) {
+ goog.appendScriptSrcNode_(src);
+ } else {
+ goog.writeScriptSrcNode_(src);
+ }
+ } else {
+ goog.oldIeWaiting_ = true;
+ var state = ' onreadystatechange=\'goog.onScriptLoad_(this, ' +
+ ++goog.lastNonModuleScriptIndex_ + ')\' ';
+ doc.write(
+ '<script type="text/javascript" src="' + src + '"' + state +
+ '></' +
+ 'script>');
+ }
+ } else {
+ doc.write(
+ '<script type="text/javascript">' +
+ goog.protectScriptTag_(opt_sourceText) + '</' +
+ 'script>');
+ }
+ return true;
+ } else {
+ return false;
+ }
+ };
+
+ /**
+ * Rewrites closing script tags in input to avoid ending an enclosing script
+ * tag.
+ *
+ * @param {string} str
+ * @return {string}
+ * @private
+ */
+ goog.protectScriptTag_ = function(str) {
+ return str.replace(/<\/(SCRIPT)/ig, '\\x3c/$1');
+ };
+
+ /**
+ * Determines whether the given language needs to be transpiled.
+ * @param {string} lang
+ * @return {boolean}
+ * @private
+ */
+ goog.needsTranspile_ = function(lang) {
+ if (goog.TRANSPILE == 'always') {
+ return true;
+ } else if (goog.TRANSPILE == 'never') {
+ return false;
+ } else if (!goog.requiresTranspilation_) {
+ goog.requiresTranspilation_ = goog.createRequiresTranspilation_();
+ }
+ if (lang in goog.requiresTranspilation_) {
+ return goog.requiresTranspilation_[lang];
+ } else {
+ throw new Error('Unknown language mode: ' + lang);
+ }
+ };
+
+ /** @private {?Object<string, boolean>} */
+ goog.requiresTranspilation_ = null;
+
+
+ /** @private {number} */
+ goog.lastNonModuleScriptIndex_ = 0;
+
+
+ /**
+ * A readystatechange handler for legacy IE
+ * @param {?} script
+ * @param {number} scriptIndex
+ * @return {boolean}
+ * @private
+ */
+ goog.onScriptLoad_ = function(script, scriptIndex) {
+ // for now load the modules when we reach the last script,
+ // later allow more inter-mingling.
+ if (script.readyState == 'complete' &&
+ goog.lastNonModuleScriptIndex_ == scriptIndex) {
+ goog.loadQueuedModules_();
+ }
+ return true;
+ };
+
+ /**
+ * Resolves dependencies based on the dependencies added using addDependency
+ * and calls importScript_ in the correct order.
+ * @param {string} pathToLoad The path from which to start discovering
+ * dependencies.
+ * @private
+ */
+ goog.writeScripts_ = function(pathToLoad) {
+ /** @type {!Array<string>} The scripts we need to write this time. */
+ var scripts = [];
+ var seenScript = {};
+ var deps = goog.dependencies_;
+
+ /** @param {string} path */
+ function visitNode(path) {
+ if (path in deps.written) {
+ return;
+ }
+
+ // We have already visited this one. We can get here if we have cyclic
+ // dependencies.
+ if (path in deps.visited) {
+ return;
+ }
+
+ deps.visited[path] = true;
+
+ if (path in deps.requires) {
+ for (var requireName in deps.requires[path]) {
+ // If the required name is defined, we assume that it was already
+ // bootstrapped by other means.
+ if (!goog.isProvided_(requireName)) {
+ if (requireName in deps.nameToPath) {
+ visitNode(deps.nameToPath[requireName]);
+ } else {
+ throw Error('Undefined nameToPath for ' + requireName);
+ }
+ }
+ }
+ }
+
+ if (!(path in seenScript)) {
+ seenScript[path] = true;
+ scripts.push(path);
+ }
+ }
+
+ visitNode(pathToLoad);
+
+ // record that we are going to load all these scripts.
+ for (var i = 0; i < scripts.length; i++) {
+ var path = scripts[i];
+ goog.dependencies_.written[path] = true;
+ }
+
+ // If a module is loaded synchronously then we need to
+ // clear the current inModuleLoader value, and restore it when we are
+ // done loading the current "requires".
+ var moduleState = goog.moduleLoaderState_;
+ goog.moduleLoaderState_ = null;
+
+ for (var i = 0; i < scripts.length; i++) {
+ var path = scripts[i];
+ if (path) {
+ var loadFlags = deps.loadFlags[path] || {};
+ var languageLevel = loadFlags['lang'] || 'es3';
+ var needsTranspile = goog.needsTranspile_(languageLevel);
+ if (loadFlags['module'] == 'goog' || needsTranspile) {
+ goog.importProcessedScript_(
+ goog.basePath + path, loadFlags['module'] == 'goog',
+ needsTranspile);
+ } else {
+ goog.importScript_(goog.basePath + path);
+ }
+ } else {
+ goog.moduleLoaderState_ = moduleState;
+ throw Error('Undefined script input');
+ }
+ }
+
+ // restore the current "module loading state"
+ goog.moduleLoaderState_ = moduleState;
+ };
+
+
+ /**
+ * Looks at the dependency rules and tries to determine the script file that
+ * fulfills a particular rule.
+ * @param {string} rule In the form goog.namespace.Class or project.script.
+ * @return {?string} Url corresponding to the rule, or null.
+ * @private
+ */
+ goog.getPathFromDeps_ = function(rule) {
+ if (rule in goog.dependencies_.nameToPath) {
+ return goog.dependencies_.nameToPath[rule];
+ } else {
+ return null;
+ }
+ };
+
+ goog.findBasePath_();
+
+ // Allow projects to manage the deps files themselves.
+ if (!goog.global.CLOSURE_NO_DEPS) {
+ goog.importScript_(goog.basePath + 'deps.js');
+ }
+}
+
+
+/**
+ * @package {?boolean}
+ * Visible for testing.
+ */
+goog.hasBadLetScoping = null;
+
+
+/**
+ * @return {boolean}
+ * @package Visible for testing.
+ */
+goog.useSafari10Workaround = function() {
+ if (goog.hasBadLetScoping == null) {
+ var hasBadLetScoping;
+ try {
+ hasBadLetScoping = !eval(
+ '"use strict";' +
+ 'let x = 1; function f() { return typeof x; };' +
+ 'f() == "number";');
+ } catch (e) {
+ // Assume that ES6 syntax isn't supported.
+ hasBadLetScoping = false;
+ }
+ goog.hasBadLetScoping = hasBadLetScoping;
+ }
+ return goog.hasBadLetScoping;
+};
+
+
+/**
+ * @param {string} moduleDef
+ * @return {string}
+ * @package Visible for testing.
+ */
+goog.workaroundSafari10EvalBug = function(moduleDef) {
+ return '(function(){' + moduleDef +
+ '\n' + // Terminate any trailing single line comment.
+ ';' + // Terminate any trailing expression.
+ '})();\n';
+};
+
+
+/**
+ * @param {function(?):?|string} moduleDef The module definition.
+ */
+goog.loadModule = function(moduleDef) {
+ // NOTE: we allow function definitions to be either in the from
+ // of a string to eval (which keeps the original source intact) or
+ // in a eval forbidden environment (CSP) we allow a function definition
+ // which in its body must call {@code goog.module}, and return the exports
+ // of the module.
+ var previousState = goog.moduleLoaderState_;
+ try {
+ goog.moduleLoaderState_ = {
+ moduleName: undefined,
+ declareLegacyNamespace: false
+ };
+ var exports;
+ if (goog.isFunction(moduleDef)) {
+ exports = moduleDef.call(undefined, {});
+ } else if (goog.isString(moduleDef)) {
+ if (goog.useSafari10Workaround()) {
+ moduleDef = goog.workaroundSafari10EvalBug(moduleDef);
+ }
+
+ exports = goog.loadModuleFromSource_.call(undefined, moduleDef);
+ } else {
+ throw Error('Invalid module definition');
+ }
+
+ var moduleName = goog.moduleLoaderState_.moduleName;
+ if (!goog.isString(moduleName) || !moduleName) {
+ throw Error('Invalid module name \"' + moduleName + '\"');
+ }
+
+ // Don't seal legacy namespaces as they may be uses as a parent of
+ // another namespace
+ if (goog.moduleLoaderState_.declareLegacyNamespace) {
+ goog.constructNamespace_(moduleName, exports);
+ } else if (
+ goog.SEAL_MODULE_EXPORTS && Object.seal && typeof exports == 'object' &&
+ exports != null) {
+ Object.seal(exports);
+ }
+
+ goog.loadedModules_[moduleName] = exports;
+ } finally {
+ goog.moduleLoaderState_ = previousState;
+ }
+};
+
+
+/**
+ * @private @const
+ */
+goog.loadModuleFromSource_ = /** @type {function(string):?} */ (function() {
+ // NOTE: we avoid declaring parameters or local variables here to avoid
+ // masking globals or leaking values into the module definition.
+ 'use strict';
+ var exports = {};
+ eval(arguments[0]);
+ return exports;
+});
+
+
+/**
+ * Normalize a file path by removing redundant ".." and extraneous "." file
+ * path components.
+ * @param {string} path
+ * @return {string}
+ * @private
+ */
+goog.normalizePath_ = function(path) {
+ var components = path.split('/');
+ var i = 0;
+ while (i < components.length) {
+ if (components[i] == '.') {
+ components.splice(i, 1);
+ } else if (
+ i && components[i] == '..' && components[i - 1] &&
+ components[i - 1] != '..') {
+ components.splice(--i, 2);
+ } else {
+ i++;
+ }
+ }
+ return components.join('/');
+};
+
+
+/**
+ * Provides a hook for loading a file when using Closure's goog.require() API
+ * with goog.modules. In particular this hook is provided to support Node.js.
+ *
+ * @type {(function(string):string)|undefined}
+ */
+goog.global.CLOSURE_LOAD_FILE_SYNC;
+
+
+/**
+ * Loads file by synchronous XHR. Should not be used in production environments.
+ * @param {string} src Source URL.
+ * @return {?string} File contents, or null if load failed.
+ * @private
+ */
+goog.loadFileSync_ = function(src) {
+ if (goog.global.CLOSURE_LOAD_FILE_SYNC) {
+ return goog.global.CLOSURE_LOAD_FILE_SYNC(src);
+ } else {
+ try {
+ /** @type {XMLHttpRequest} */
+ var xhr = new goog.global['XMLHttpRequest']();
+ xhr.open('get', src, false);
+ xhr.send();
+ // NOTE: Successful http: requests have a status of 200, but successful
+ // file: requests may have a status of zero. Any other status, or a
+ // thrown exception (particularly in case of file: requests) indicates
+ // some sort of error, which we treat as a missing or unavailable file.
+ return xhr.status == 0 || xhr.status == 200 ? xhr.responseText : null;
+ } catch (err) {
+ // No need to rethrow or log, since errors should show up on their own.
+ return null;
+ }
+ }
+};
+
+
+/**
+ * Retrieve and execute a script that needs some sort of wrapping.
+ * @param {string} src Script source URL.
+ * @param {boolean} isModule Whether to load as a module.
+ * @param {boolean} needsTranspile Whether to transpile down to ES3.
+ * @private
+ */
+goog.retrieveAndExec_ = function(src, isModule, needsTranspile) {
+ if (!COMPILED) {
+ // The full but non-canonicalized URL for later use.
+ var originalPath = src;
+ // Canonicalize the path, removing any /./ or /../ since Chrome's debugging
+ // console doesn't auto-canonicalize XHR loads as it does <script> srcs.
+ src = goog.normalizePath_(src);
+
+ var importScript =
+ goog.global.CLOSURE_IMPORT_SCRIPT || goog.writeScriptTag_;
+
+ var scriptText = goog.loadFileSync_(src);
+ if (scriptText == null) {
+ throw new Error('Load of "' + src + '" failed');
+ }
+
+ if (needsTranspile) {
+ scriptText = goog.transpile_.call(goog.global, scriptText, src);
+ }
+
+ if (isModule) {
+ scriptText = goog.wrapModule_(src, scriptText);
+ } else {
+ scriptText += '\n//# sourceURL=' + src;
+ }
+ var isOldIE = goog.IS_OLD_IE_;
+ if (isOldIE && goog.oldIeWaiting_) {
+ goog.dependencies_.deferred[originalPath] = scriptText;
+ goog.queuedModules_.push(originalPath);
+ } else {
+ importScript(src, scriptText);
+ }
+ }
+};
+
+
+/**
+ * Lazily retrieves the transpiler and applies it to the source.
+ * @param {string} code JS code.
+ * @param {string} path Path to the code.
+ * @return {string} The transpiled code.
+ * @private
+ */
+goog.transpile_ = function(code, path) {
+ var jscomp = goog.global['$jscomp'];
+ if (!jscomp) {
+ goog.global['$jscomp'] = jscomp = {};
+ }
+ var transpile = jscomp.transpile;
+ if (!transpile) {
+ var transpilerPath = goog.basePath + goog.TRANSPILER;
+ var transpilerCode = goog.loadFileSync_(transpilerPath);
+ if (transpilerCode) {
+ // This must be executed synchronously, since by the time we know we
+ // need it, we're about to load and write the ES6 code synchronously,
+ // so a normal script-tag load will be too slow.
+ eval(transpilerCode + '\n//# sourceURL=' + transpilerPath);
+ // Even though the transpiler is optional, if $gwtExport is found, it's
+ // a sign the transpiler was loaded and the $jscomp.transpile *should*
+ // be there.
+ if (goog.global['$gwtExport'] && goog.global['$gwtExport']['$jscomp'] &&
+ !goog.global['$gwtExport']['$jscomp']['transpile']) {
+ throw new Error(
+ 'The transpiler did not properly export the "transpile" ' +
+ 'method. $gwtExport: ' + JSON.stringify(goog.global['$gwtExport']));
+ }
+ // transpile.js only exports a single $jscomp function, transpile. We
+ // grab just that and add it to the existing definition of $jscomp which
+ // contains the polyfills.
+ goog.global['$jscomp'].transpile =
+ goog.global['$gwtExport']['$jscomp']['transpile'];
+ jscomp = goog.global['$jscomp'];
+ transpile = jscomp.transpile;
+ }
+ }
+ if (!transpile) {
+ // The transpiler is an optional component. If it's not available then
+ // replace it with a pass-through function that simply logs.
+ var suffix = ' requires transpilation but no transpiler was found.';
+ transpile = jscomp.transpile = function(code, path) {
+ // TODO(user): figure out some way to get this error to show up
+ // in test results, noting that the failure may occur in many
+ // different ways, including in loadModule() before the test
+ // runner even comes up.
+ goog.logToConsole_(path + suffix);
+ return code;
+ };
+ }
+ // Note: any transpilation errors/warnings will be logged to the console.
+ return transpile(code, path);
+};
+
+
+//==============================================================================
+// Language Enhancements
+//==============================================================================
+
+
+/**
+ * This is a "fixed" version of the typeof operator. It differs from the typeof
+ * operator in such a way that null returns 'null' and arrays return 'array'.
+ * @param {?} value The value to get the type of.
+ * @return {string} The name of the type.
+ */
+goog.typeOf = function(value) {
+ var s = typeof value;
+ if (s == 'object') {
+ if (value) {
+ // Check these first, so we can avoid calling Object.prototype.toString if
+ // possible.
+ //
+ // IE improperly marshals typeof across execution contexts, but a
+ // cross-context object will still return false for "instanceof Object".
+ if (value instanceof Array) {
+ return 'array';
+ } else if (value instanceof Object) {
+ return s;
+ }
+
+ // HACK: In order to use an Object prototype method on the arbitrary
+ // value, the compiler requires the value be cast to type Object,
+ // even though the ECMA spec explicitly allows it.
+ var className = Object.prototype.toString.call(
+ /** @type {!Object} */ (value));
+ // In Firefox 3.6, attempting to access iframe window objects' length
+ // property throws an NS_ERROR_FAILURE, so we need to special-case it
+ // here.
+ if (className == '[object Window]') {
+ return 'object';
+ }
+
+ // We cannot always use constructor == Array or instanceof Array because
+ // different frames have different Array objects. In IE6, if the iframe
+ // where the array was created is destroyed, the array loses its
+ // prototype. Then dereferencing val.splice here throws an exception, so
+ // we can't use goog.isFunction. Calling typeof directly returns 'unknown'
+ // so that will work. In this case, this function will return false and
+ // most array functions will still work because the array is still
+ // array-like (supports length and []) even though it has lost its
+ // prototype.
+ // Mark Miller noticed that Object.prototype.toString
+ // allows access to the unforgeable [[Class]] property.
+ // 15.2.4.2 Object.prototype.toString ( )
+ // When the toString method is called, the following steps are taken:
+ // 1. Get the [[Class]] property of this object.
+ // 2. Compute a string value by concatenating the three strings
+ // "[object ", Result(1), and "]".
+ // 3. Return Result(2).
+ // and this behavior survives the destruction of the execution context.
+ if ((className == '[object Array]' ||
+ // In IE all non value types are wrapped as objects across window
+ // boundaries (not iframe though) so we have to do object detection
+ // for this edge case.
+ typeof value.length == 'number' &&
+ typeof value.splice != 'undefined' &&
+ typeof value.propertyIsEnumerable != 'undefined' &&
+ !value.propertyIsEnumerable('splice')
+
+ )) {
+ return 'array';
+ }
+ // HACK: There is still an array case that fails.
+ // function ArrayImpostor() {}
+ // ArrayImpostor.prototype = [];
+ // var impostor = new ArrayImpostor;
+ // this can be fixed by getting rid of the fast path
+ // (value instanceof Array) and solely relying on
+ // (value && Object.prototype.toString.vall(value) === '[object Array]')
+ // but that would require many more function calls and is not warranted
+ // unless closure code is receiving objects from untrusted sources.
+
+ // IE in cross-window calls does not correctly marshal the function type
+ // (it appears just as an object) so we cannot use just typeof val ==
+ // 'function'. However, if the object has a call property, it is a
+ // function.
+ if ((className == '[object Function]' ||
+ typeof value.call != 'undefined' &&
+ typeof value.propertyIsEnumerable != 'undefined' &&
+ !value.propertyIsEnumerable('call'))) {
+ return 'function';
+ }
+
+ } else {
+ return 'null';
+ }
+
+ } else if (s == 'function' && typeof value.call == 'undefined') {
+ // In Safari typeof nodeList returns 'function', and on Firefox typeof
+ // behaves similarly for HTML{Applet,Embed,Object}, Elements and RegExps. We
+ // would like to return object for those and we can detect an invalid
+ // function by making sure that the function object has a call method.
+ return 'object';
+ }
+ return s;
+};
+
+
+/**
+ * Returns true if the specified value is null.
+ * @param {?} val Variable to test.
+ * @return {boolean} Whether variable is null.
+ */
+goog.isNull = function(val) {
+ return val === null;
+};
+
+
+/**
+ * Returns true if the specified value is defined and not null.
+ * @param {?} val Variable to test.
+ * @return {boolean} Whether variable is defined and not null.
+ */
+goog.isDefAndNotNull = function(val) {
+ // Note that undefined == null.
+ return val != null;
+};
+
+
+/**
+ * Returns true if the specified value is an array.
+ * @param {?} val Variable to test.
+ * @return {boolean} Whether variable is an array.
+ */
+goog.isArray = function(val) {
+ return goog.typeOf(val) == 'array';
+};
+
+
+/**
+ * Returns true if the object looks like an array. To qualify as array like
+ * the value needs to be either a NodeList or an object with a Number length
+ * property. As a special case, a function value is not array like, because its
+ * length property is fixed to correspond to the number of expected arguments.
+ * @param {?} val Variable to test.
+ * @return {boolean} Whether variable is an array.
+ */
+goog.isArrayLike = function(val) {
+ var type = goog.typeOf(val);
+ // We do not use goog.isObject here in order to exclude function values.
+ return type == 'array' || type == 'object' && typeof val.length == 'number';
+};
+
+
+/**
+ * Returns true if the object looks like a Date. To qualify as Date-like the
+ * value needs to be an object and have a getFullYear() function.
+ * @param {?} val Variable to test.
+ * @return {boolean} Whether variable is a like a Date.
+ */
+goog.isDateLike = function(val) {
+ return goog.isObject(val) && typeof val.getFullYear == 'function';
+};
+
+
+/**
+ * Returns true if the specified value is a function.
+ * @param {?} val Variable to test.
+ * @return {boolean} Whether variable is a function.
+ */
+goog.isFunction = function(val) {
+ return goog.typeOf(val) == 'function';
+};
+
+
+/**
+ * Returns true if the specified value is an object. This includes arrays and
+ * functions.
+ * @param {?} val Variable to test.
+ * @return {boolean} Whether variable is an object.
+ */
+goog.isObject = function(val) {
+ var type = typeof val;
+ return type == 'object' && val != null || type == 'function';
+ // return Object(val) === val also works, but is slower, especially if val is
+ // not an object.
+};
+
+
+/**
+ * Gets a unique ID for an object. This mutates the object so that further calls
+ * with the same object as a parameter returns the same value. The unique ID is
+ * guaranteed to be unique across the current session amongst objects that are
+ * passed into {@code getUid}. There is no guarantee that the ID is unique or
+ * consistent across sessions. It is unsafe to generate unique ID for function
+ * prototypes.
+ *
+ * @param {Object} obj The object to get the unique ID for.
+ * @return {number} The unique ID for the object.
+ */
+goog.getUid = function(obj) {
+ // TODO(arv): Make the type stricter, do not accept null.
+
+ // In Opera window.hasOwnProperty exists but always returns false so we avoid
+ // using it. As a consequence the unique ID generated for BaseClass.prototype
+ // and SubClass.prototype will be the same.
+ return obj[goog.UID_PROPERTY_] ||
+ (obj[goog.UID_PROPERTY_] = ++goog.uidCounter_);
+};
+
+
+/**
+ * Whether the given object is already assigned a unique ID.
+ *
+ * This does not modify the object.
+ *
+ * @param {!Object} obj The object to check.
+ * @return {boolean} Whether there is an assigned unique id for the object.
+ */
+goog.hasUid = function(obj) {
+ return !!obj[goog.UID_PROPERTY_];
+};
+
+
+/**
+ * Removes the unique ID from an object. This is useful if the object was
+ * previously mutated using {@code goog.getUid} in which case the mutation is
+ * undone.
+ * @param {Object} obj The object to remove the unique ID field from.
+ */
+goog.removeUid = function(obj) {
+ // TODO(arv): Make the type stricter, do not accept null.
+
+ // In IE, DOM nodes are not instances of Object and throw an exception if we
+ // try to delete. Instead we try to use removeAttribute.
+ if (obj !== null && 'removeAttribute' in obj) {
+ obj.removeAttribute(goog.UID_PROPERTY_);
+ }
+
+ try {
+ delete obj[goog.UID_PROPERTY_];
+ } catch (ex) {
+ }
+};
+
+
+/**
+ * Name for unique ID property. Initialized in a way to help avoid collisions
+ * with other closure JavaScript on the same page.
+ * @type {string}
+ * @private
+ */
+goog.UID_PROPERTY_ = 'closure_uid_' + ((Math.random() * 1e9) >>> 0);
+
+
+/**
+ * Counter for UID.
+ * @type {number}
+ * @private
+ */
+goog.uidCounter_ = 0;
+
+
+/**
+ * Adds a hash code field to an object. The hash code is unique for the
+ * given object.
+ * @param {Object} obj The object to get the hash code for.
+ * @return {number} The hash code for the object.
+ * @deprecated Use goog.getUid instead.
+ */
+goog.getHashCode = goog.getUid;
+
+
+/**
+ * Removes the hash code field from an object.
+ * @param {Object} obj The object to remove the field from.
+ * @deprecated Use goog.removeUid instead.
+ */
+goog.removeHashCode = goog.removeUid;
+
+
+/**
+ * Clones a value. The input may be an Object, Array, or basic type. Objects and
+ * arrays will be cloned recursively.
+ *
+ * WARNINGS:
+ * <code>goog.cloneObject</code> does not detect reference loops. Objects that
+ * refer to themselves will cause infinite recursion.
+ *
+ * <code>goog.cloneObject</code> is unaware of unique identifiers, and copies
+ * UIDs created by <code>getUid</code> into cloned results.
+ *
+ * @param {*} obj The value to clone.
+ * @return {*} A clone of the input value.
+ * @deprecated goog.cloneObject is unsafe. Prefer the goog.object methods.
+ */
+goog.cloneObject = function(obj) {
+ var type = goog.typeOf(obj);
+ if (type == 'object' || type == 'array') {
+ if (obj.clone) {
+ return obj.clone();
+ }
+ var clone = type == 'array' ? [] : {};
+ for (var key in obj) {
+ clone[key] = goog.cloneObject(obj[key]);
+ }
+ return clone;
+ }
+
+ return obj;
+};
+
+
+/**
+ * A native implementation of goog.bind.
+ * @param {?function(this:T, ...)} fn A function to partially apply.
+ * @param {T} selfObj Specifies the object which this should point to when the
+ * function is run.
+ * @param {...*} var_args Additional arguments that are partially applied to the
+ * function.
+ * @return {!Function} A partially-applied form of the function goog.bind() was
+ * invoked as a method of.
+ * @template T
+ * @private
+ */
+goog.bindNative_ = function(fn, selfObj, var_args) {
+ return /** @type {!Function} */ (fn.call.apply(fn.bind, arguments));
+};
+
+
+/**
+ * A pure-JS implementation of goog.bind.
+ * @param {?function(this:T, ...)} fn A function to partially apply.
+ * @param {T} selfObj Specifies the object which this should point to when the
+ * function is run.
+ * @param {...*} var_args Additional arguments that are partially applied to the
+ * function.
+ * @return {!Function} A partially-applied form of the function goog.bind() was
+ * invoked as a method of.
+ * @template T
+ * @private
+ */
+goog.bindJs_ = function(fn, selfObj, var_args) {
+ if (!fn) {
+ throw new Error();
+ }
+
+ if (arguments.length > 2) {
+ var boundArgs = Array.prototype.slice.call(arguments, 2);
+ return function() {
+ // Prepend the bound arguments to the current arguments.
+ var newArgs = Array.prototype.slice.call(arguments);
+ Array.prototype.unshift.apply(newArgs, boundArgs);
+ return fn.apply(selfObj, newArgs);
+ };
+
+ } else {
+ return function() {
+ return fn.apply(selfObj, arguments);
+ };
+ }
+};
+
+
+/**
+ * Partially applies this function to a particular 'this object' and zero or
+ * more arguments. The result is a new function with some arguments of the first
+ * function pre-filled and the value of this 'pre-specified'.
+ *
+ * Remaining arguments specified at call-time are appended to the pre-specified
+ * ones.
+ *
+ * Also see: {@link #partial}.
+ *
+ * Usage:
+ * <pre>var barMethBound = goog.bind(myFunction, myObj, 'arg1', 'arg2');
+ * barMethBound('arg3', 'arg4');</pre>
+ *
+ * @param {?function(this:T, ...)} fn A function to partially apply.
+ * @param {T} selfObj Specifies the object which this should point to when the
+ * function is run.
+ * @param {...*} var_args Additional arguments that are partially applied to the
+ * function.
+ * @return {!Function} A partially-applied form of the function goog.bind() was
+ * invoked as a method of.
+ * @template T
+ * @suppress {deprecated} See above.
+ */
+goog.bind = function(fn, selfObj, var_args) {
+ // TODO(nicksantos): narrow the type signature.
+ if (Function.prototype.bind &&
+ // NOTE(nicksantos): Somebody pulled base.js into the default Chrome
+ // extension environment. This means that for Chrome extensions, they get
+ // the implementation of Function.prototype.bind that calls goog.bind
+ // instead of the native one. Even worse, we don't want to introduce a
+ // circular dependency between goog.bind and Function.prototype.bind, so
+ // we have to hack this to make sure it works correctly.
+ Function.prototype.bind.toString().indexOf('native code') != -1) {
+ goog.bind = goog.bindNative_;
+ } else {
+ goog.bind = goog.bindJs_;
+ }
+ return goog.bind.apply(null, arguments);
+};
+
+
+/**
+ * Like goog.bind(), except that a 'this object' is not required. Useful when
+ * the target function is already bound.
+ *
+ * Usage:
+ * var g = goog.partial(f, arg1, arg2);
+ * g(arg3, arg4);
+ *
+ * @param {Function} fn A function to partially apply.
+ * @param {...*} var_args Additional arguments that are partially applied to fn.
+ * @return {!Function} A partially-applied form of the function goog.partial()
+ * was invoked as a method of.
+ */
+goog.partial = function(fn, var_args) {
+ var args = Array.prototype.slice.call(arguments, 1);
+ return function() {
+ // Clone the array (with slice()) and append additional arguments
+ // to the existing arguments.
+ var newArgs = args.slice();
+ newArgs.push.apply(newArgs, arguments);
+ return fn.apply(this, newArgs);
+ };
+};
+
+
+/**
+ * Copies all the members of a source object to a target object. This method
+ * does not work on all browsers for all objects that contain keys such as
+ * toString or hasOwnProperty. Use goog.object.extend for this purpose.
+ * @param {Object} target Target.
+ * @param {Object} source Source.
+ */
+goog.mixin = function(target, source) {
+ for (var x in source) {
+ target[x] = source[x];
+ }
+
+ // For IE7 or lower, the for-in-loop does not contain any properties that are
+ // not enumerable on the prototype object (for example, isPrototypeOf from
+ // Object.prototype) but also it will not include 'replace' on objects that
+ // extend String and change 'replace' (not that it is common for anyone to
+ // extend anything except Object).
+};
+
+
+/**
+ * @return {number} An integer value representing the number of milliseconds
+ * between midnight, January 1, 1970 and the current time.
+ */
+goog.now = (goog.TRUSTED_SITE && Date.now) || (function() {
+ // Unary plus operator converts its operand to a number which in
+ // the case of
+ // a date is done by calling getTime().
+ return +new Date();
+ });
+
+
+/**
+ * Evals JavaScript in the global scope. In IE this uses execScript, other
+ * browsers use goog.global.eval. If goog.global.eval does not evaluate in the
+ * global scope (for example, in Safari), appends a script tag instead.
+ * Throws an exception if neither execScript or eval is defined.
+ * @param {string} script JavaScript string.
+ */
+goog.globalEval = function(script) {
+ if (goog.global.execScript) {
+ goog.global.execScript(script, 'JavaScript');
+ } else if (goog.global.eval) {
+ // Test to see if eval works
+ if (goog.evalWorksForGlobals_ == null) {
+ goog.global.eval('var _evalTest_ = 1;');
+ if (typeof goog.global['_evalTest_'] != 'undefined') {
+ try {
+ delete goog.global['_evalTest_'];
+ } catch (ignore) {
+ // Microsoft edge fails the deletion above in strict mode.
+ }
+ goog.evalWorksForGlobals_ = true;
+ } else {
+ goog.evalWorksForGlobals_ = false;
+ }
+ }
+
+ if (goog.evalWorksForGlobals_) {
+ goog.global.eval(script);
+ } else {
+ /** @type {Document} */
+ var doc = goog.global.document;
+ var scriptElt =
+ /** @type {!HTMLScriptElement} */ (doc.createElement('SCRIPT'));
+ scriptElt.type = 'text/javascript';
+ scriptElt.defer = false;
+ // Note(user): can't use .innerHTML since "t('<test>')" will fail and
+ // .text doesn't work in Safari 2. Therefore we append a text node.
+ scriptElt.appendChild(doc.createTextNode(script));
+ doc.body.appendChild(scriptElt);
+ doc.body.removeChild(scriptElt);
+ }
+ } else {
+ throw Error('goog.globalEval not available');
+ }
+};
+
+
+/**
+ * Indicates whether or not we can call 'eval' directly to eval code in the
+ * global scope. Set to a Boolean by the first call to goog.globalEval (which
+ * empirically tests whether eval works for globals). @see goog.globalEval
+ * @type {?boolean}
+ * @private
+ */
+goog.evalWorksForGlobals_ = null;
+
+
+/**
+ * Optional map of CSS class names to obfuscated names used with
+ * goog.getCssName().
+ * @private {!Object<string, string>|undefined}
+ * @see goog.setCssNameMapping
+ */
+goog.cssNameMapping_;
+
+
+/**
+ * Optional obfuscation style for CSS class names. Should be set to either
+ * 'BY_WHOLE' or 'BY_PART' if defined.
+ * @type {string|undefined}
+ * @private
+ * @see goog.setCssNameMapping
+ */
+goog.cssNameMappingStyle_;
+
+
+
+/**
+ * A hook for modifying the default behavior goog.getCssName. The function
+ * if present, will recieve the standard output of the goog.getCssName as
+ * its input.
+ *
+ * @type {(function(string):string)|undefined}
+ */
+goog.global.CLOSURE_CSS_NAME_MAP_FN;
+
+
+/**
+ * Handles strings that are intended to be used as CSS class names.
+ *
+ * This function works in tandem with @see goog.setCssNameMapping.
+ *
+ * Without any mapping set, the arguments are simple joined with a hyphen and
+ * passed through unaltered.
+ *
+ * When there is a mapping, there are two possible styles in which these
+ * mappings are used. In the BY_PART style, each part (i.e. in between hyphens)
+ * of the passed in css name is rewritten according to the map. In the BY_WHOLE
+ * style, the full css name is looked up in the map directly. If a rewrite is
+ * not specified by the map, the compiler will output a warning.
+ *
+ * When the mapping is passed to the compiler, it will replace calls to
+ * goog.getCssName with the strings from the mapping, e.g.
+ * var x = goog.getCssName('foo');
+ * var y = goog.getCssName(this.baseClass, 'active');
+ * becomes:
+ * var x = 'foo';
+ * var y = this.baseClass + '-active';
+ *
+ * If one argument is passed it will be processed, if two are passed only the
+ * modifier will be processed, as it is assumed the first argument was generated
+ * as a result of calling goog.getCssName.
+ *
+ * @param {string} className The class name.
+ * @param {string=} opt_modifier A modifier to be appended to the class name.
+ * @return {string} The class name or the concatenation of the class name and
+ * the modifier.
+ */
+goog.getCssName = function(className, opt_modifier) {
+ // String() is used for compatibility with compiled soy where the passed
+ // className can be non-string objects.
+ if (String(className).charAt(0) == '.') {
+ throw new Error(
+ 'className passed in goog.getCssName must not start with ".".' +
+ ' You passed: ' + className);
+ }
+
+ var getMapping = function(cssName) {
+ return goog.cssNameMapping_[cssName] || cssName;
+ };
+
+ var renameByParts = function(cssName) {
+ // Remap all the parts individually.
+ var parts = cssName.split('-');
+ var mapped = [];
+ for (var i = 0; i < parts.length; i++) {
+ mapped.push(getMapping(parts[i]));
+ }
+ return mapped.join('-');
+ };
+
+ var rename;
+ if (goog.cssNameMapping_) {
+ rename =
+ goog.cssNameMappingStyle_ == 'BY_WHOLE' ? getMapping : renameByParts;
+ } else {
+ rename = function(a) {
+ return a;
+ };
+ }
+
+ var result =
+ opt_modifier ? className + '-' + rename(opt_modifier) : rename(className);
+
+ // The special CLOSURE_CSS_NAME_MAP_FN allows users to specify further
+ // processing of the class name.
+ if (goog.global.CLOSURE_CSS_NAME_MAP_FN) {
+ return goog.global.CLOSURE_CSS_NAME_MAP_FN(result);
+ }
+
+ return result;
+};
+
+
+/**
+ * Sets the map to check when returning a value from goog.getCssName(). Example:
+ * <pre>
+ * goog.setCssNameMapping({
+ * "goog": "a",
+ * "disabled": "b",
+ * });
+ *
+ * var x = goog.getCssName('goog');
+ * // The following evaluates to: "a a-b".
+ * goog.getCssName('goog') + ' ' + goog.getCssName(x, 'disabled')
+ * </pre>
+ * When declared as a map of string literals to string literals, the JSCompiler
+ * will replace all calls to goog.getCssName() using the supplied map if the
+ * --process_closure_primitives flag is set.
+ *
+ * @param {!Object} mapping A map of strings to strings where keys are possible
+ * arguments to goog.getCssName() and values are the corresponding values
+ * that should be returned.
+ * @param {string=} opt_style The style of css name mapping. There are two valid
+ * options: 'BY_PART', and 'BY_WHOLE'.
+ * @see goog.getCssName for a description.
+ */
+goog.setCssNameMapping = function(mapping, opt_style) {
+ goog.cssNameMapping_ = mapping;
+ goog.cssNameMappingStyle_ = opt_style;
+};
+
+
+/**
+ * To use CSS renaming in compiled mode, one of the input files should have a
+ * call to goog.setCssNameMapping() with an object literal that the JSCompiler
+ * can extract and use to replace all calls to goog.getCssName(). In uncompiled
+ * mode, JavaScript code should be loaded before this base.js file that declares
+ * a global variable, CLOSURE_CSS_NAME_MAPPING, which is used below. This is
+ * to ensure that the mapping is loaded before any calls to goog.getCssName()
+ * are made in uncompiled mode.
+ *
+ * A hook for overriding the CSS name mapping.
+ * @type {!Object<string, string>|undefined}
+ */
+goog.global.CLOSURE_CSS_NAME_MAPPING;
+
+
+if (!COMPILED && goog.global.CLOSURE_CSS_NAME_MAPPING) {
+ // This does not call goog.setCssNameMapping() because the JSCompiler
+ // requires that goog.setCssNameMapping() be called with an object literal.
+ goog.cssNameMapping_ = goog.global.CLOSURE_CSS_NAME_MAPPING;
+}
+
+
+/**
+ * Gets a localized message.
+ *
+ * This function is a compiler primitive. If you give the compiler a localized
+ * message bundle, it will replace the string at compile-time with a localized
+ * version, and expand goog.getMsg call to a concatenated string.
+ *
+ * Messages must be initialized in the form:
+ * <code>
+ * var MSG_NAME = goog.getMsg('Hello {$placeholder}', {'placeholder': 'world'});
+ * </code>
+ *
+ * This function produces a string which should be treated as plain text. Use
+ * {@link goog.html.SafeHtmlFormatter} in conjunction with goog.getMsg to
+ * produce SafeHtml.
+ *
+ * @param {string} str Translatable string, places holders in the form {$foo}.
+ * @param {Object<string, string>=} opt_values Maps place holder name to value.
+ * @return {string} message with placeholders filled.
+ */
+goog.getMsg = function(str, opt_values) {
+ if (opt_values) {
+ str = str.replace(/\{\$([^}]+)}/g, function(match, key) {
+ return (opt_values != null && key in opt_values) ? opt_values[key] :
+ match;
+ });
+ }
+ return str;
+};
+
+
+/**
+ * Gets a localized message. If the message does not have a translation, gives a
+ * fallback message.
+ *
+ * This is useful when introducing a new message that has not yet been
+ * translated into all languages.
+ *
+ * This function is a compiler primitive. Must be used in the form:
+ * <code>var x = goog.getMsgWithFallback(MSG_A, MSG_B);</code>
+ * where MSG_A and MSG_B were initialized with goog.getMsg.
+ *
+ * @param {string} a The preferred message.
+ * @param {string} b The fallback message.
+ * @return {string} The best translated message.
+ */
+goog.getMsgWithFallback = function(a, b) {
+ return a;
+};
+
+
+/**
+ * Exposes an unobfuscated global namespace path for the given object.
+ * Note that fields of the exported object *will* be obfuscated, unless they are
+ * exported in turn via this function or goog.exportProperty.
+ *
+ * Also handy for making public items that are defined in anonymous closures.
+ *
+ * ex. goog.exportSymbol('public.path.Foo', Foo);
+ *
+ * ex. goog.exportSymbol('public.path.Foo.staticFunction', Foo.staticFunction);
+ * public.path.Foo.staticFunction();
+ *
+ * ex. goog.exportSymbol('public.path.Foo.prototype.myMethod',
+ * Foo.prototype.myMethod);
+ * new public.path.Foo().myMethod();
+ *
+ * @param {string} publicPath Unobfuscated name to export.
+ * @param {*} object Object the name should point to.
+ * @param {Object=} opt_objectToExportTo The object to add the path to; default
+ * is goog.global.
+ */
+goog.exportSymbol = function(publicPath, object, opt_objectToExportTo) {
+ goog.exportPath_(publicPath, object, opt_objectToExportTo);
+};
+
+
+/**
+ * Exports a property unobfuscated into the object's namespace.
+ * ex. goog.exportProperty(Foo, 'staticFunction', Foo.staticFunction);
+ * ex. goog.exportProperty(Foo.prototype, 'myMethod', Foo.prototype.myMethod);
+ * @param {Object} object Object whose static property is being exported.
+ * @param {string} publicName Unobfuscated name to export.
+ * @param {*} symbol Object the name should point to.
+ */
+goog.exportProperty = function(object, publicName, symbol) {
+ object[publicName] = symbol;
+};
+
+
+/**
+ * Inherit the prototype methods from one constructor into another.
+ *
+ * Usage:
+ * <pre>
+ * function ParentClass(a, b) { }
+ * ParentClass.prototype.foo = function(a) { };
+ *
+ * function ChildClass(a, b, c) {
+ * ChildClass.base(this, 'constructor', a, b);
+ * }
+ * goog.inherits(ChildClass, ParentClass);
+ *
+ * var child = new ChildClass('a', 'b', 'see');
+ * child.foo(); // This works.
+ * </pre>
+ *
+ * @param {!Function} childCtor Child class.
+ * @param {!Function} parentCtor Parent class.
+ */
+goog.inherits = function(childCtor, parentCtor) {
+ /** @constructor */
+ function tempCtor() {}
+ tempCtor.prototype = parentCtor.prototype;
+ childCtor.superClass_ = parentCtor.prototype;
+ childCtor.prototype = new tempCtor();
+ /** @override */
+ childCtor.prototype.constructor = childCtor;
+
+ /**
+ * Calls superclass constructor/method.
+ *
+ * This function is only available if you use goog.inherits to
+ * express inheritance relationships between classes.
+ *
+ * NOTE: This is a replacement for goog.base and for superClass_
+ * property defined in childCtor.
+ *
+ * @param {!Object} me Should always be "this".
+ * @param {string} methodName The method name to call. Calling
+ * superclass constructor can be done with the special string
+ * 'constructor'.
+ * @param {...*} var_args The arguments to pass to superclass
+ * method/constructor.
+ * @return {*} The return value of the superclass method/constructor.
+ */
+ childCtor.base = function(me, methodName, var_args) {
+ // Copying using loop to avoid deop due to passing arguments object to
+ // function. This is faster in many JS engines as of late 2014.
+ var args = new Array(arguments.length - 2);
+ for (var i = 2; i < arguments.length; i++) {
+ args[i - 2] = arguments[i];
+ }
+ return parentCtor.prototype[methodName].apply(me, args);
+ };
+};
+
+
+/**
+ * Call up to the superclass.
+ *
+ * If this is called from a constructor, then this calls the superclass
+ * constructor with arguments 1-N.
+ *
+ * If this is called from a prototype method, then you must pass the name of the
+ * method as the second argument to this function. If you do not, you will get a
+ * runtime error. This calls the superclass' method with arguments 2-N.
+ *
+ * This function only works if you use goog.inherits to express inheritance
+ * relationships between your classes.
+ *
+ * This function is a compiler primitive. At compile-time, the compiler will do
+ * macro expansion to remove a lot of the extra overhead that this function
+ * introduces. The compiler will also enforce a lot of the assumptions that this
+ * function makes, and treat it as a compiler error if you break them.
+ *
+ * @param {!Object} me Should always be "this".
+ * @param {*=} opt_methodName The method name if calling a super method.
+ * @param {...*} var_args The rest of the arguments.
+ * @return {*} The return value of the superclass method.
+ * @suppress {es5Strict} This method can not be used in strict mode, but
+ * all Closure Library consumers must depend on this file.
+ * @deprecated goog.base is not strict mode compatible. Prefer the static
+ * "base" method added to the constructor by goog.inherits
+ * or ES6 classes and the "super" keyword.
+ */
+goog.base = function(me, opt_methodName, var_args) {
+ var caller = arguments.callee.caller;
+
+ if (goog.STRICT_MODE_COMPATIBLE || (goog.DEBUG && !caller)) {
+ throw Error(
+ 'arguments.caller not defined. goog.base() cannot be used ' +
+ 'with strict mode code. See ' +
+ 'http://www.ecma-international.org/ecma-262/5.1/#sec-C');
+ }
+
+ if (caller.superClass_) {
+ // Copying using loop to avoid deop due to passing arguments object to
+ // function. This is faster in many JS engines as of late 2014.
+ var ctorArgs = new Array(arguments.length - 1);
+ for (var i = 1; i < arguments.length; i++) {
+ ctorArgs[i - 1] = arguments[i];
+ }
+ // This is a constructor. Call the superclass constructor.
+ return caller.superClass_.constructor.apply(me, ctorArgs);
+ }
+
+ // Copying using loop to avoid deop due to passing arguments object to
+ // function. This is faster in many JS engines as of late 2014.
+ var args = new Array(arguments.length - 2);
+ for (var i = 2; i < arguments.length; i++) {
+ args[i - 2] = arguments[i];
+ }
+ var foundCaller = false;
+ for (var ctor = me.constructor; ctor;
+ ctor = ctor.superClass_ && ctor.superClass_.constructor) {
+ if (ctor.prototype[opt_methodName] === caller) {
+ foundCaller = true;
+ } else if (foundCaller) {
+ return ctor.prototype[opt_methodName].apply(me, args);
+ }
+ }
+
+ // If we did not find the caller in the prototype chain, then one of two
+ // things happened:
+ // 1) The caller is an instance method.
+ // 2) This method was not called by the right caller.
+ if (me[opt_methodName] === caller) {
+ return me.constructor.prototype[opt_methodName].apply(me, args);
+ } else {
+ throw Error(
+ 'goog.base called from a method of one name ' +
+ 'to a method of a different name');
+ }
+};
+
+
+/**
+ * Allow for aliasing within scope functions. This function exists for
+ * uncompiled code - in compiled code the calls will be inlined and the aliases
+ * applied. In uncompiled code the function is simply run since the aliases as
+ * written are valid JavaScript.
+ *
+ *
+ * @param {function()} fn Function to call. This function can contain aliases
+ * to namespaces (e.g. "var dom = goog.dom") or classes
+ * (e.g. "var Timer = goog.Timer").
+ */
+goog.scope = function(fn) {
+ if (goog.isInModuleLoader_()) {
+ throw Error('goog.scope is not supported within a goog.module.');
+ }
+ fn.call(goog.global);
+};
+
+
+/*
+ * To support uncompiled, strict mode bundles that use eval to divide source
+ * like so:
+ * eval('someSource;//# sourceUrl sourcefile.js');
+ * We need to export the globally defined symbols "goog" and "COMPILED".
+ * Exporting "goog" breaks the compiler optimizations, so we required that
+ * be defined externally.
+ * NOTE: We don't use goog.exportSymbol here because we don't want to trigger
+ * extern generation when that compiler option is enabled.
+ */
+if (!COMPILED) {
+ goog.global['COMPILED'] = COMPILED;
+}
+
+
+//==============================================================================
+// goog.defineClass implementation
+//==============================================================================
+
+
+/**
+ * Creates a restricted form of a Closure "class":
+ * - from the compiler's perspective, the instance returned from the
+ * constructor is sealed (no new properties may be added). This enables
+ * better checks.
+ * - the compiler will rewrite this definition to a form that is optimal
+ * for type checking and optimization (initially this will be a more
+ * traditional form).
+ *
+ * @param {Function} superClass The superclass, Object or null.
+ * @param {goog.defineClass.ClassDescriptor} def
+ * An object literal describing
+ * the class. It may have the following properties:
+ * "constructor": the constructor function
+ * "statics": an object literal containing methods to add to the constructor
+ * as "static" methods or a function that will receive the constructor
+ * function as its only parameter to which static properties can
+ * be added.
+ * all other properties are added to the prototype.
+ * @return {!Function} The class constructor.
+ */
+goog.defineClass = function(superClass, def) {
+ // TODO(johnlenz): consider making the superClass an optional parameter.
+ var constructor = def.constructor;
+ var statics = def.statics;
+ // Wrap the constructor prior to setting up the prototype and static methods.
+ if (!constructor || constructor == Object.prototype.constructor) {
+ constructor = function() {
+ throw Error('cannot instantiate an interface (no constructor defined).');
+ };
+ }
+
+ var cls = goog.defineClass.createSealingConstructor_(constructor, superClass);
+ if (superClass) {
+ goog.inherits(cls, superClass);
+ }
+
+ // Remove all the properties that should not be copied to the prototype.
+ delete def.constructor;
+ delete def.statics;
+
+ goog.defineClass.applyProperties_(cls.prototype, def);
+ if (statics != null) {
+ if (statics instanceof Function) {
+ statics(cls);
+ } else {
+ goog.defineClass.applyProperties_(cls, statics);
+ }
+ }
+
+ return cls;
+};
+
+
+/**
+ * @typedef {{
+ * constructor: (!Function|undefined),
+ * statics: (Object|undefined|function(Function):void)
+ * }}
+ */
+goog.defineClass.ClassDescriptor;
+
+
+/**
+ * @define {boolean} Whether the instances returned by goog.defineClass should
+ * be sealed when possible.
+ *
+ * When sealing is disabled the constructor function will not be wrapped by
+ * goog.defineClass, making it incompatible with ES6 class methods.
+ */
+goog.define('goog.defineClass.SEAL_CLASS_INSTANCES', goog.DEBUG);
+
+
+/**
+ * If goog.defineClass.SEAL_CLASS_INSTANCES is enabled and Object.seal is
+ * defined, this function will wrap the constructor in a function that seals the
+ * results of the provided constructor function.
+ *
+ * @param {!Function} ctr The constructor whose results maybe be sealed.
+ * @param {Function} superClass The superclass constructor.
+ * @return {!Function} The replacement constructor.
+ * @private
+ */
+goog.defineClass.createSealingConstructor_ = function(ctr, superClass) {
+ if (!goog.defineClass.SEAL_CLASS_INSTANCES) {
+ // Do now wrap the constructor when sealing is disabled. Angular code
+ // depends on this for injection to work properly.
+ return ctr;
+ }
+
+ // Compute whether the constructor is sealable at definition time, rather
+ // than when the instance is being constructed.
+ var superclassSealable = !goog.defineClass.isUnsealable_(superClass);
+
+ /**
+ * @this {Object}
+ * @return {?}
+ */
+ var wrappedCtr = function() {
+ // Don't seal an instance of a subclass when it calls the constructor of
+ // its super class as there is most likely still setup to do.
+ var instance = ctr.apply(this, arguments) || this;
+ instance[goog.UID_PROPERTY_] = instance[goog.UID_PROPERTY_];
+
+ if (this.constructor === wrappedCtr && superclassSealable &&
+ Object.seal instanceof Function) {
+ Object.seal(instance);
+ }
+ return instance;
+ };
+
+ return wrappedCtr;
+};
+
+
+/**
+ * @param {Function} ctr The constructor to test.
+ * @return {boolean} Whether the constructor has been tagged as unsealable
+ * using goog.tagUnsealableClass.
+ * @private
+ */
+goog.defineClass.isUnsealable_ = function(ctr) {
+ return ctr && ctr.prototype &&
+ ctr.prototype[goog.UNSEALABLE_CONSTRUCTOR_PROPERTY_];
+};
+
+
+// TODO(johnlenz): share these values with the goog.object
+/**
+ * The names of the fields that are defined on Object.prototype.
+ * @type {!Array<string>}
+ * @private
+ * @const
+ */
+goog.defineClass.OBJECT_PROTOTYPE_FIELDS_ = [
+ 'constructor', 'hasOwnProperty', 'isPrototypeOf', 'propertyIsEnumerable',
+ 'toLocaleString', 'toString', 'valueOf'
+];
+
+
+// TODO(johnlenz): share this function with the goog.object
+/**
+ * @param {!Object} target The object to add properties to.
+ * @param {!Object} source The object to copy properties from.
+ * @private
+ */
+goog.defineClass.applyProperties_ = function(target, source) {
+ // TODO(johnlenz): update this to support ES5 getters/setters
+
+ var key;
+ for (key in source) {
+ if (Object.prototype.hasOwnProperty.call(source, key)) {
+ target[key] = source[key];
+ }
+ }
+
+ // For IE the for-in-loop does not contain any properties that are not
+ // enumerable on the prototype object (for example isPrototypeOf from
+ // Object.prototype) and it will also not include 'replace' on objects that
+ // extend String and change 'replace' (not that it is common for anyone to
+ // extend anything except Object).
+ for (var i = 0; i < goog.defineClass.OBJECT_PROTOTYPE_FIELDS_.length; i++) {
+ key = goog.defineClass.OBJECT_PROTOTYPE_FIELDS_[i];
+ if (Object.prototype.hasOwnProperty.call(source, key)) {
+ target[key] = source[key];
+ }
+ }
+};
+
+
+/**
+ * Sealing classes breaks the older idiom of assigning properties on the
+ * prototype rather than in the constructor. As such, goog.defineClass
+ * must not seal subclasses of these old-style classes until they are fixed.
+ * Until then, this marks a class as "broken", instructing defineClass
+ * not to seal subclasses.
+ * @param {!Function} ctr The legacy constructor to tag as unsealable.
+ */
+goog.tagUnsealableClass = function(ctr) {
+ if (!COMPILED && goog.defineClass.SEAL_CLASS_INSTANCES) {
+ ctr.prototype[goog.UNSEALABLE_CONSTRUCTOR_PROPERTY_] = true;
+ }
+};
+
+
+/**
+ * Name for unsealable tag property.
+ * @const @private {string}
+ */
+goog.UNSEALABLE_CONSTRUCTOR_PROPERTY_ = 'goog_defineClass_legacy_unsealable';
+
+
+/**
+ * Returns a newly created map from language mode string to a boolean
+ * indicating whether transpilation should be done for that mode.
+ *
+ * Guaranteed invariant:
+ * For any two modes, l1 and l2 where l2 is a newer mode than l1,
+ * `map[l1] == true` implies that `map[l2] == true`.
+ * @private
+ * @return {!Object<string, boolean>}
+ */
+goog.createRequiresTranspilation_ = function() {
+ var /** !Object<string, boolean> */ requiresTranspilation = {'es3': false};
+ var transpilationRequiredForAllLaterModes = false;
+
+ /**
+ * Adds an entry to requiresTranspliation for the given language mode.
+ *
+ * IMPORTANT: Calls must be made in order from oldest to newest language
+ * mode.
+ * @param {string} modeName
+ * @param {function(): boolean} isSupported Returns true if the JS engine
+ * supports the given mode.
+ */
+ function addNewerLanguageTranspilationCheck(modeName, isSupported) {
+ if (transpilationRequiredForAllLaterModes) {
+ requiresTranspilation[modeName] = true;
+ } else if (isSupported()) {
+ requiresTranspilation[modeName] = false;
+ } else {
+ requiresTranspilation[modeName] = true;
+ transpilationRequiredForAllLaterModes = true;
+ }
+ }
+
+ /**
+ * Does the given code evaluate without syntax errors and return a truthy
+ * result?
+ */
+ function /** boolean */ evalCheck(/** string */ code) {
+ try {
+ return !!eval(code);
+ } catch (ignored) {
+ return false;
+ }
+ }
+
+ var userAgent = goog.global.navigator && goog.global.navigator.userAgent ?
+ goog.global.navigator.userAgent :
+ '';
+
+ // Identify ES3-only browsers by their incorrect treatment of commas.
+ addNewerLanguageTranspilationCheck('es5', function() {
+ return evalCheck('[1,].length==1');
+ });
+ addNewerLanguageTranspilationCheck('es6', function() {
+ // Edge has a non-deterministic (i.e., not reproducible) bug with ES6:
+ // https://github.com/Microsoft/ChakraCore/issues/1496.
+ var re = /Edge\/(\d+)(\.\d)*/i;
+ var edgeUserAgent = userAgent.match(re);
+ if (edgeUserAgent && Number(edgeUserAgent[1]) < 15) {
+ return false;
+ }
+ // Test es6: [FF50 (?), Edge 14 (?), Chrome 50]
+ // (a) default params (specifically shadowing locals),
+ // (b) destructuring, (c) block-scoped functions,
+ // (d) for-of (const), (e) new.target/Reflect.construct
+ var es6fullTest =
+ 'class X{constructor(){if(new.target!=String)throw 1;this.x=42}}' +
+ 'let q=Reflect.construct(X,[],String);if(q.x!=42||!(q instanceof ' +
+ 'String))throw 1;for(const a of[2,3]){if(a==2)continue;function ' +
+ 'f(z={a}){let a=0;return z.a}{function f(){return 0;}}return f()' +
+ '==3}';
+
+ return evalCheck('(()=>{"use strict";' + es6fullTest + '})()');
+ });
+ // TODO(joeltine): Remove es6-impl references for b/31340605.
+ // Consider es6-impl (widely-implemented es6 features) to be supported
+ // whenever es6 is supported. Technically es6-impl is a lower level of
+ // support than es6, but we don't have tests specifically for it.
+ addNewerLanguageTranspilationCheck('es6-impl', function() {
+ return true;
+ });
+ // ** and **= are the only new features in 'es7'
+ addNewerLanguageTranspilationCheck('es7', function() {
+ return evalCheck('2 ** 2 == 4');
+ });
+ // async functions are the only new features in 'es8'
+ addNewerLanguageTranspilationCheck('es8', function() {
+ return evalCheck('async () => 1, true');
+ });
+ return requiresTranspilation;
+};