mirror of https://github.com/tc39/test262.git
86 lines
3.2 KiB
JavaScript
86 lines
3.2 KiB
JavaScript
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// This file was procedurally generated from the following sources:
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// - src/dstr-assignment/obj-prop-elem-target-obj-literal-prop-ref.case
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// - src/dstr-assignment/default/for-of.template
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/*---
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description: The DestructuringAssignmentTarget of an AssignmentElement can extend to LHSExpressions if it is neither an ObjectLiteral nor an ArrayLiteral and its AssignmentTargetTyp is simple. Using MemberExpression (ObjLiteral + identifier). (For..of statement)
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esid: sec-for-in-and-for-of-statements-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 ( LeftHandSideExpression of AssignmentExpression ) Statement
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1. Let keyResult be the result of performing ? ForIn/OfHeadEvaluation(« »,
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AssignmentExpression, iterate).
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2. Return ? ForIn/OfBodyEvaluation(LeftHandSideExpression, Statement,
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keyResult, assignment, labelSet).
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13.7.5.13 Runtime Semantics: ForIn/OfBodyEvaluation
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[...]
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4. If destructuring is true and if lhsKind is assignment, then
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a. Assert: lhs is a LeftHandSideExpression.
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b. Let assignmentPattern be the parse of the source text corresponding to
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lhs using AssignmentPattern as the goal symbol.
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[...]
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Syntax
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AssignmentPattern : ObjectAssignmentPattern
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ObjectAssignmentPattern : { AssignmentPropertyList }
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AssignmentPropertyList : AssignmentProperty
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AssignmentProperty : PropertyName : 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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ObjectAssignmentPattern : { AssignmentPropertyList }
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1. Perform ? RequireObjectCoercible(value).
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2. Perform ? PropertyDestructuringAssignmentEvaluation for AssignmentPropertyList using value as the argument.
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3. Return NormalCompletion(empty).
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Runtime Semantics: PropertyDestructuringAssignmentEvaluation
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AssignmentProperty : PropertyName : AssignmentElement
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1. Let name be the result of evaluating PropertyName.
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2. ReturnIfAbrupt(name).
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3. Perform ? KeyedDestructuringAssignmentEvaluation of AssignmentElement with value and name as the arguments.
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4. Return a new List containing name.
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Runtime Semantics: KeyedDestructuringAssignmentEvaluation
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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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---*/
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var setValue;
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var counter = 0;
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for ({ x: {
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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} of [{x: 23}]) {
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assert.sameValue(setValue, 23);
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counter += 1;
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}
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assert.sameValue(counter, 1);
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