mirror of https://github.com/tc39/test262.git
59 lines
1.8 KiB
JavaScript
59 lines
1.8 KiB
JavaScript
// This file was procedurally generated from the following sources:
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// - src/dstr-binding/obj-ptrn-id-init-skipped.case
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// - src/dstr-binding/default/for-var.template
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/*---
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description: Destructuring initializer is not evaluated when value is not `undefined` (for statement)
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esid: sec-for-statement-runtime-semantics-labelledevaluation
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es6id: 13.7.4.7
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features: [destructuring-binding]
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flags: [generated]
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info: |
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IterationStatement :
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for ( var VariableDeclarationList ; Expressionopt ; Expressionopt ) Statement
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1. Let varDcl be the result of evaluating VariableDeclarationList.
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[...]
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13.3.2.4 Runtime Semantics: Evaluation
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VariableDeclarationList : VariableDeclarationList , VariableDeclaration
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1. Let next be the result of evaluating VariableDeclarationList.
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2. ReturnIfAbrupt(next).
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3. Return the result of evaluating VariableDeclaration.
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VariableDeclaration : BindingPattern Initializer
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1. Let rhs be the result of evaluating Initializer.
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2. Let rval be GetValue(rhs).
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3. ReturnIfAbrupt(rval).
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4. Return the result of performing BindingInitialization for BindingPattern
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passing rval and undefined as arguments.
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13.3.3.7 Runtime Semantics: KeyedBindingInitialization
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SingleNameBinding : BindingIdentifier Initializeropt
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[...]
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6. If Initializer is present and v is undefined, then
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[...]
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[...]
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---*/
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var initCount = 0;
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function counter() {
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initCount += 1;
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}
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var iterCount = 0;
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for (var { w = counter(), x = counter(), y = counter(), z = counter() } = { w: null, x: 0, y: false, z: '' }; iterCount < 1; ) {
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assert.sameValue(w, null);
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assert.sameValue(x, 0);
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assert.sameValue(y, false);
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assert.sameValue(z, '');
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assert.sameValue(initCount, 0);
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iterCount += 1;
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}
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assert.sameValue(iterCount, 1, 'Iteration occurred as expected');
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