初始化

康凯

2022-05-20 aa4c235a8ca67ea8b731f90c951a465e92c0a865

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
'use strict';
// https://github.com/tc39/proposal-iterator-helpers
var $ = require('../internals/export');
var anInstance = require('../internals/an-instance');
var createNonEnumerableProperty = require('../internals/create-non-enumerable-property');
var has = require('../internals/has');
var wellKnownSymbol = require('../internals/well-known-symbol');
var AsyncIteratorPrototype = require('../internals/async-iterator-prototype');
var IS_PURE = require('../internals/is-pure');
 
var TO_STRING_TAG = wellKnownSymbol('toStringTag');
 
var AsyncIteratorConstructor = function AsyncIterator() {
  anInstance(this, AsyncIteratorConstructor);
};
 
AsyncIteratorConstructor.prototype = AsyncIteratorPrototype;
 
if (!has(AsyncIteratorPrototype, TO_STRING_TAG)) {
  createNonEnumerableProperty(AsyncIteratorPrototype, TO_STRING_TAG, 'AsyncIterator');
}
 
if (!has(AsyncIteratorPrototype, 'constructor') || AsyncIteratorPrototype.constructor === Object) {
  createNonEnumerableProperty(AsyncIteratorPrototype, 'constructor', AsyncIteratorConstructor);
}
 
$({ global: true, forced: IS_PURE }, {
  AsyncIterator: AsyncIteratorConstructor
});