8c87ae9b88
- Add a new container object to store the data required for PromiseResolveThenableJob. - Create a new runtime function to enqueue the microtask event with the required data. This patches causes a 4% regression in the bluebird benchmark. BUG=v8:5343 Review-Url: https://codereview.chromium.org/2314903004 Cr-Commit-Position: refs/heads/master@{#39571}
24 lines
561 B
JavaScript
24 lines
561 B
JavaScript
// Copyright 2015 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Flags: --allow-natives-syntax
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function assertAsync(b, s) {
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if (!b) {
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%AbortJS(" FAILED!")
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}
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}
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var handler = {
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get: function(target, name) {
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if (name === 'then') {
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return (val) => Promise.prototype.then.call(target, val);
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}
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}
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};
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var target = new Promise(r => r(42));
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var p = new Proxy(target, handler);
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Promise.resolve(p).then((val) => assertAsync(val === 42));
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