mirror of https://github.com/tc39/test262.git
36 lines
1.0 KiB
JavaScript
36 lines
1.0 KiB
JavaScript
// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
|
|
// This code is governed by the BSD license found in the LICENSE file.
|
|
/*---
|
|
esid: sec-destructuring-binding-patterns-runtime-semantics-bindinginitialization
|
|
description: >
|
|
Destructuring initializer is not evaluated when value is an object
|
|
with [[IsHTMLDDA]] internal slot.
|
|
info: |
|
|
BindingPattern : ObjectBindingPattern
|
|
|
|
1. Perform ? RequireObjectCoercible(value).
|
|
2. Return the result of performing BindingInitialization for
|
|
ObjectBindingPattern using value and environment as arguments.
|
|
|
|
Runtime Semantics: KeyedBindingInitialization
|
|
|
|
SingleNameBinding : BindingIdentifier Initializer[opt]
|
|
|
|
[...]
|
|
4. If Initializer is present and v is undefined, then
|
|
[...]
|
|
5. If environment is undefined, return ? PutValue(lhs, v).
|
|
features: [destructuring-binding, IsHTMLDDA]
|
|
---*/
|
|
|
|
var initCount = 0;
|
|
var counter = function() {
|
|
initCount += 1;
|
|
};
|
|
|
|
var x, IsHTMLDDA = $262.IsHTMLDDA;
|
|
({x = counter()} = {x: IsHTMLDDA});
|
|
|
|
assert.sameValue(x, IsHTMLDDA);
|
|
assert.sameValue(initCount, 0);
|