2 // https://github.com/tc39/proposal-iterator-helpers
3 var $ = require('../internals/export');
4 var anObject = require('../internals/an-object');
5 var toPositiveInteger = require('../internals/to-positive-integer');
6 var createAsyncIteratorProxy = require('../internals/async-iterator-create-proxy');
8 var AsyncIteratorProxy = createAsyncIteratorProxy(function (arg) {
9 if (!this.remaining--) {
11 return { done: true, value: undefined };
12 } return this.next.call(this.iterator, arg);
15 $({ target: 'AsyncIterator', proto: true, real: true }, {
16 take: function take(limit) {
17 return new AsyncIteratorProxy({
18 iterator: anObject(this),
19 remaining: toPositiveInteger(limit)