mirror of https://github.com/tc39/test262.git
38 lines
1.1 KiB
JavaScript
38 lines
1.1 KiB
JavaScript
// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
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// This code is governed by the BSD license found in the LICENSE file.
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/*---
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esid: sec-destructuring-binding-patterns-runtime-semantics-bindinginitialization
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description: >
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Destructuring initializer is not evaluated when value is an object
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with [[IsHTMLDDA]] internal slot.
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info: |
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BindingPattern : ArrayBindingPattern
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1. Let iteratorRecord be ? GetIterator(value).
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2. Let result be IteratorBindingInitialization of ArrayBindingPattern with arguments
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iteratorRecord and environment.
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3. If iteratorRecord.[[Done]] is false, return ? IteratorClose(iteratorRecord, result).
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4. Return result.
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Runtime Semantics: IteratorBindingInitialization
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SingleNameBinding : BindingIdentifier Initializer[opt]
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[...]
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5. If Initializer is present and v is undefined, then
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[...]
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6. If environment is undefined, return ? PutValue(lhs, v).
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features: [destructuring-binding, IsHTMLDDA]
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---*/
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let initCount = 0;
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const counter = function() {
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initCount += 1;
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};
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const IsHTMLDDA = $262.IsHTMLDDA;
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const [x = counter()] = [IsHTMLDDA];
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assert.sameValue(x, IsHTMLDDA);
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assert.sameValue(initCount, 0);
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