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45 lines
1.5 KiB
JavaScript
45 lines
1.5 KiB
JavaScript
// This file was procedurally generated from the following sources:
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// - src/dstr-binding/ary-ptrn-elem-ary-rest-iter.case
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// - src/dstr-binding/default/let-stmt.template
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/*---
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description: BindingElement with array binding pattern and initializer is not used (`let` statement)
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esid: sec-let-and-const-declarations-runtime-semantics-evaluation
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es6id: 13.3.1.4
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features: [destructuring-binding]
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flags: [generated]
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info: |
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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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13.3.3.6 Runtime Semantics: IteratorBindingInitialization
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BindingElement : BindingPatternInitializer opt
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1. If iteratorRecord.[[done]] is false, then
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a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
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[...]
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e. Else,
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i. Let v be IteratorValue(next).
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[...]
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4. Return the result of performing BindingInitialization of BindingPattern
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with v and environment as the arguments.
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---*/
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var values = [2, 1, 3];
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var initCount = 0;
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let [[...x] = function() { initCount += 1; }()] = [values];
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assert(Array.isArray(x));
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assert.sameValue(x[0], 2);
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assert.sameValue(x[1], 1);
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assert.sameValue(x[2], 3);
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assert.sameValue(x.length, 3);
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assert.notSameValue(x, values);
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assert.sameValue(initCount, 0);
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