WebKit/Source/JavaScriptCore/builtins/AsyncIteratorPrototype.js at main · WebKit/WebKit · GitHub

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* Redistribution and use in source and binary forms, with or without

* modification, are permitted provided that the following conditions

* are met:

* 1. Redistributions of source code must retain the above copyright

* notice, this list of conditions and the following disclaimer.

* 2. Redistributions in binary form must reproduce the above copyright

* notice, this list of conditions and the following disclaimer in the

* documentation and/or other materials provided with the distribution.

* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY

* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR

* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY

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// https://tc39.es/proposal-explicit-resource-management/#sec-%asynciteratorprototype%-@@asyncdispose

@overriddenName="[Symbol.asyncDispose]"

function asyncDispose()

{

'use strict';

try {

var returnMethod = this.return;

if (@isUndefinedOrNull(returnMethod))

return @newResolvedPromise(@undefined);

var result = returnMethod.@call(this);

var resultWrapper;

if (@isPromise(result) && result.constructor === @Promise)

resultWrapper = result;

else

resultWrapper = @newResolvedPromise(result);

var promise = @newPromise();

@performPromiseThen(resultWrapper, @promiseReturnUndefinedOnFulfilled, @undefined, promise);

return promise;

} catch (e) {

return @newRejectedPromise(e);

}

WebKit/Source/JavaScriptCore/builtins/AsyncIteratorPrototype.js at main · WebKit/WebKit · GitHub

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