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48 lines
1.5 KiB
JavaScript
48 lines
1.5 KiB
JavaScript
// This file was procedurally generated from the following sources:
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// - src/dstr-binding/ary-ptrn-elem-obj-prop-id-init.case
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// - src/dstr-binding/default/let-stmt.template
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/*---
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description: BindingElement with object binding pattern and initializer is 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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[...]
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2. If iteratorRecord.[[done]] is true, let v be undefined.
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3. If Initializer is present and v is undefined, then
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a. Let defaultValue be the result of evaluating Initializer.
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b. Let v be ? GetValue(defaultValue).
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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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let [{ u: v, w: x, y: z } = { u: 444, w: 555, y: 666 }] = [];
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assert.sameValue(v, 444);
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assert.sameValue(x, 555);
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assert.sameValue(z, 666);
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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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