com.google.javascript.jscomp.js.es6.util.makeiterator.js Maven / Gradle / Ivy
/*
* Copyright 2016 The Closure Compiler Authors.
*
* 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 Polyfill for for-of loops.
*/
'require es6/util/arrayiterator';
/**
* Creates an iterator for the given iterable. This iterator should never
* be exposed to user code.
*
* @param {string|!Iterable|!Iterator|!Arguments} iterable
* @return {!Iterator}
* @template T
* @suppress {reportUnknownTypes}
*/
$jscomp.makeIterator = function(iterable) {
// NOTE: Disabling typechecking because [] not allowed on @struct.
var iteratorFunction = typeof Symbol != 'undefined' && Symbol.iterator &&
(/** @type {?} */ (iterable)[Symbol.iterator]);
return iteratorFunction ? iteratorFunction.call(iterable) :
$jscomp.arrayIterator(/** @type {!Array} */ (iterable));
};