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61 lines
2.1 KiB
Plaintext
61 lines
2.1 KiB
Plaintext
// Copyright (C) 2019 Leo Balter. All rights reserved.
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// This code is governed by the BSD license found in the LICENSE file.
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/*---
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esid: prod-DestructuringAssignmentTarget
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desc: >
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The DestructuringAssignmentTarget of an AssignmentElement can extend to LHSExpressions if
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it is neither an ObjectLiteral nor an ArrayLiteral and its AssignmentTargetTyp is simple.
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Using MemberExpression (ObjLiteral + identifier).
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info: |
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Syntax
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AssignmentPattern : ArrayAssignmentPattern
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ArrayAssignmentPattern : [ AssignmentElementList ]
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AssignmentElementList : AssignmentElisionElement
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AssignmentElisionElement : Elision_opt AssignmentElement
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AssignmentElement : DestructuringAssignmentTarget Initializer_opt
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DestructuringAssignmentTarget : LeftHandSideExpression
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Static Semantics: Early Errors
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DestructuringAssignmentTarget : LeftHandSideExpression
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- It is a Syntax Error if LeftHandSideExpression is either an ObjectLiteral or an ArrayLiteral and if LeftHandSideExpression is not covering an AssignmentPattern.
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- It is a Syntax Error if LeftHandSideExpression is neither an ObjectLiteral nor an ArrayLiteral and AssignmentTargetType(LeftHandSideExpression) is not simple.
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Runtime Semantics: DestructuringAssignmentEvaluation
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ArrayAssignmentPattern : [ AssignmentElementList ]
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1. Let iteratorRecord be ? GetIterator(value).
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2. Let result be IteratorDestructuringAssignmentEvaluation of AssignmentElementList with argument iteratorRecord.
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3. If iteratorRecord.[[Done]] is false, return ? IteratorClose(iteratorRecord, result).
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4. Return result.
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Runtime Semantics: IteratorDestructuringAssignmentEvaluation
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AssignmentElement : DestructuringAssignmentTarget Initializer
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1. If DestructuringAssignmentTarget is neither an ObjectLiteral nor an ArrayLiteral, then
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a. Let lref be the result of evaluating DestructuringAssignmentTarget.
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...
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7. Return ? PutValue(lref, v).
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template: default
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---*/
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//- setup
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var x, setValue;
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//- elems
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[{
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get y() {
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throw new Test262Error('The property should not be accessed.');
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},
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set y(val) {
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setValue = val;
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}
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}.y]
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//- vals
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[23]
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//- body
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assert.sameValue(setValue, 23);
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