2 // https://github.com/tc39/proposal-iterator-helpers
3 var $ = require('../internals/export');
4 var anInstance = require('../internals/an-instance');
5 var createNonEnumerableProperty = require('../internals/create-non-enumerable-property');
6 var hasOwn = require('../internals/has-own-property');
7 var wellKnownSymbol = require('../internals/well-known-symbol');
8 var AsyncIteratorPrototype = require('../internals/async-iterator-prototype');
9 var IS_PURE = require('../internals/is-pure');
11 var TO_STRING_TAG = wellKnownSymbol('toStringTag');
13 var AsyncIteratorConstructor = function AsyncIterator() {
14 anInstance(this, AsyncIteratorPrototype);
17 AsyncIteratorConstructor.prototype = AsyncIteratorPrototype;
19 if (!hasOwn(AsyncIteratorPrototype, TO_STRING_TAG)) {
20 createNonEnumerableProperty(AsyncIteratorPrototype, TO_STRING_TAG, 'AsyncIterator');
23 if (IS_PURE || !hasOwn(AsyncIteratorPrototype, 'constructor') || AsyncIteratorPrototype.constructor === Object) {
24 createNonEnumerableProperty(AsyncIteratorPrototype, 'constructor', AsyncIteratorConstructor);
27 $({ global: true, forced: IS_PURE }, {
28 AsyncIterator: AsyncIteratorConstructor