mirror of https://github.com/tc39/test262.git
77 lines
2.2 KiB
JavaScript
77 lines
2.2 KiB
JavaScript
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// This file was procedurally generated from the following sources:
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// - src/dstr-binding/obj-ptrn-prop-id-init-skipped.case
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// - src/dstr-binding/default/for-let.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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features: [destructuring-binding]
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flags: [generated]
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info: |
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IterationStatement :
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for ( LexicalDeclaration Expressionopt ; Expressionopt ) Statement
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[...]
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7. Let forDcl be the result of evaluating LexicalDeclaration.
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[...]
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LexicalDeclaration : LetOrConst BindingList ;
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1. Let next be the result of evaluating BindingList.
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2. ReturnIfAbrupt(next).
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3. Return NormalCompletion(empty).
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BindingList : BindingList , LexicalBinding
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1. Let next be the result of evaluating BindingList.
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2. ReturnIfAbrupt(next).
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3. Return the result of evaluating LexicalBinding.
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LexicalBinding : BindingPattern Initializer
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1. Let rhs be the result of evaluating Initializer.
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2. Let value be GetValue(rhs).
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3. ReturnIfAbrupt(value).
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4. Let env be the running execution context’s LexicalEnvironment.
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5. Return the result of performing BindingInitialization for BindingPattern
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using value and env as the arguments.
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13.3.3.7 Runtime Semantics: KeyedBindingInitialization
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BindingElement : BindingPattern Initializeropt
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[...]
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3. If Initializer is present and v is undefined, then
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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 (let { s: t = counter(), u: v = counter(), w: x = counter(), y: z = counter() } = { s: null, u: 0, w: false, y: '' }; iterCount < 1; ) {
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assert.sameValue(t, null);
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assert.sameValue(v, 0);
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assert.sameValue(x, false);
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assert.sameValue(z, '');
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assert.sameValue(initCount, 0);
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assert.throws(ReferenceError, function() {
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s;
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});
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assert.throws(ReferenceError, function() {
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u;
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});
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assert.throws(ReferenceError, function() {
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w;
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});
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assert.throws(ReferenceError, function() {
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y;
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});
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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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