com.google.javascript.jscomp.js.es6.util.makeasynciterator.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/symbol';
'require es6/util/makeiterator';
/**
* Creates an iterator for the given iterable.
*
* @param {string|!AsyncIterable|!Iterable|!Iterator|!Arguments} iterable
* @return {!AsyncIteratorIterable}
* @template T
* @suppress {reportUnknownTypes}
*/
$jscomp.makeAsyncIterator = function(iterable) {
var asyncIteratorFunction = (iterable)[Symbol.asyncIterator];
if (asyncIteratorFunction !== undefined) {
return asyncIteratorFunction.call(iterable);
}
return new $jscomp.AsyncIteratorFromSyncWrapper($jscomp.makeIterator(
/** @type {string|!Iterable|!Iterator|!Arguments} */
(iterable)));
};
/**
*
* @param {!Iterator} iterator
* @constructor
* @implements {AsyncIteratorIterable}
* @template T
* @suppress {reportUnknownTypes}
*/
$jscomp.AsyncIteratorFromSyncWrapper = function(iterator) {
/**
* @return {!AsyncIterator}
*/
this[Symbol.asyncIterator] = function() {
return this;
};
/**
* @return {!Iterator>>}
*/
this[Symbol.iterator] = function() {
return iterator;
};
/**
* @param {?=} param
* @return {!Promise>}
*/
this.next = function(param) {
return Promise.resolve(iterator.next(param));
};
if (iterator['throw'] !== undefined) {
/**
* @param {?} param
* @return {!Promise>}
*/
this['throw'] = function(param) {
return Promise.resolve(iterator['throw'](param));
};
}
if (iterator['return'] !== undefined) {
/**
* @param {T} param
* @return {!Promise>}
*/
this['return'] = function(param) {
return Promise.resolve(iterator['return'](param));
};
}
};