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77 lines
2.9 KiB
JavaScript
77 lines
2.9 KiB
JavaScript
// This file was procedurally generated from the following sources:
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// - src/dstr-assignment/obj-prop-elem-target-obj-literal-prop-ref-init-active.case
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// - src/dstr-assignment/default/assignment-expr.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) with active initializer. (AssignmentExpression)
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esid: sec-variable-statement-runtime-semantics-evaluation
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features: [destructuring-binding]
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flags: [generated]
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info: |
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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
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BindingPattern passing rval and undefined as arguments.
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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 result;
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var vals = {x: undefined};
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result = { 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 = 42} = vals;
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assert.sameValue(setValue, 42);
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assert.sameValue(result, vals);
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