mirror of https://github.com/tc39/test262.git
42 lines
1.4 KiB
JavaScript
42 lines
1.4 KiB
JavaScript
// This file was procedurally generated from the following sources:
|
|
// - src/dstr-binding/ary-ptrn-elem-id-init-skipped.case
|
|
// - src/dstr-binding/default/const-stmt.template
|
|
/*---
|
|
description: Destructuring initializer is not evaluated when value is not `undefined` (`const` statement)
|
|
esid: sec-let-and-const-declarations-runtime-semantics-evaluation
|
|
es6id: 13.3.1.4
|
|
features: [destructuring-binding]
|
|
flags: [generated]
|
|
info: |
|
|
LexicalBinding : BindingPattern Initializer
|
|
|
|
1. Let rhs be the result of evaluating Initializer.
|
|
2. Let value be GetValue(rhs).
|
|
3. ReturnIfAbrupt(value).
|
|
4. Let env be the running execution context's LexicalEnvironment.
|
|
5. Return the result of performing BindingInitialization for BindingPattern
|
|
using value and env as the arguments.
|
|
|
|
13.3.3.6 Runtime Semantics: IteratorBindingInitialization
|
|
|
|
SingleNameBinding : BindingIdentifier Initializeropt
|
|
|
|
[...]
|
|
6. If Initializer is present and v is undefined, then
|
|
[...]
|
|
7. If environment is undefined, return PutValue(lhs, v).
|
|
8. Return InitializeReferencedBinding(lhs, v).
|
|
---*/
|
|
var initCount = 0;
|
|
function counter() {
|
|
initCount += 1;
|
|
}
|
|
|
|
const [w = counter(), x = counter(), y = counter(), z = counter()] = [null, 0, false, ''];
|
|
|
|
assert.sameValue(w, null);
|
|
assert.sameValue(x, 0);
|
|
assert.sameValue(y, false);
|
|
assert.sameValue(z, '');
|
|
assert.sameValue(initCount, 0);
|