vue hello world项目
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3 years ago
'use strict';
// https://github.com/tc39/proposal-iterator-helpers
var $ = require('../internals/export');
var apply = require('../internals/function-apply');
var call = require('../internals/function-call');
var anObject = require('../internals/an-object');
var toPositiveInteger = require('../internals/to-positive-integer');
var createAsyncIteratorProxy = require('../internals/async-iterator-create-proxy');
var AsyncIteratorProxy = createAsyncIteratorProxy(function (Promise, args) {
var iterator = this.iterator;
var returnMethod, result;
if (!this.remaining--) {
result = { done: true, value: undefined };
this.done = true;
returnMethod = iterator['return'];
if (returnMethod !== undefined) {
return Promise.resolve(call(returnMethod, iterator)).then(function () {
return result;
});
}
return result;
} return apply(this.next, iterator, args);
});
$({ target: 'AsyncIterator', proto: true, real: true, forced: true }, {
take: function take(limit) {
return new AsyncIteratorProxy({
iterator: anObject(this),
remaining: toPositiveInteger(limit)
});
}
});