mirror of https://github.com/tc39/test262.git
65 lines
1.8 KiB
JavaScript
65 lines
1.8 KiB
JavaScript
// This file was procedurally generated from the following sources:
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// - src/dstr-binding/ary-init-iter-no-close.case
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// - src/dstr-binding/default/for-var.template
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/*---
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description: Iterator is not closed when exhausted by pattern evaluation (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: [Symbol.iterator, 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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13.3.3.5 Runtime Semantics: BindingInitialization
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BindingPattern : ArrayBindingPattern
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[...]
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4. If iteratorRecord.[[done]] is false, return ? IteratorClose(iterator,
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result).
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[...]
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---*/
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var doneCallCount = 0;
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var iter = {};
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iter[Symbol.iterator] = function() {
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return {
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next: function() {
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return { value: null, done: true };
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},
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return: function() {
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doneCallCount += 1;
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return {};
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}
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};
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};
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var iterCount = 0;
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for (var [x] = iter; iterCount < 1; ) {
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assert.sameValue(doneCallCount, 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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