You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
27 lines
1012 B
27 lines
1012 B
1 month ago
|
'use strict';
|
||
|
|
// https://github.com/tc39/proposal-async-explicit-resource-management
|
||
|
|
var call = require('../internals/function-call');
|
||
|
|
var defineBuiltIn = require('../internals/define-built-in');
|
||
|
|
var getBuiltIn = require('../internals/get-built-in');
|
||
|
|
var getMethod = require('../internals/get-method');
|
||
|
|
var hasOwn = require('../internals/has-own-property');
|
||
|
|
var wellKnownSymbol = require('../internals/well-known-symbol');
|
||
|
|
var AsyncIteratorPrototype = require('../internals/async-iterator-prototype');
|
||
|
|
|
||
|
|
var ASYNC_DISPOSE = wellKnownSymbol('asyncDispose');
|
||
|
|
var Promise = getBuiltIn('Promise');
|
||
|
|
|
||
|
|
if (!hasOwn(AsyncIteratorPrototype, ASYNC_DISPOSE)) {
|
||
|
|
defineBuiltIn(AsyncIteratorPrototype, ASYNC_DISPOSE, function () {
|
||
|
|
var O = this;
|
||
|
|
return new Promise(function (resolve, reject) {
|
||
|
|
var $return = getMethod(O, 'return');
|
||
|
|
if ($return) {
|
||
|
|
Promise.resolve(call($return, O)).then(function () {
|
||
|
|
resolve(undefined);
|
||
|
|
}, reject);
|
||
|
|
} else resolve(undefined);
|
||
|
|
});
|
||
|
|
});
|
||
|
|
}
|