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57 lines
1.9 KiB
JavaScript
57 lines
1.9 KiB
JavaScript
// This file was procedurally generated from the following sources:
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// - src/dstr-assignment/array-elem-nested-memberexpr-optchain-prop-ref-init.case
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// - src/dstr-assignment/syntax/assignment-expr.template
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/*---
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description: It is a Syntax Error if LeftHandSideExpression of an DestructuringAssignmentTarget is neither an ObjectLiteral nor an ArrayLiteral and AssignmentTargetType(LeftHandSideExpression) is not simple Using Object (MemberExpression OptionalChain .IdentifierName Initializer) (AssignmentExpression)
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esid: sec-variable-statement-runtime-semantics-evaluation
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features: [optional-chaining, destructuring-binding]
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flags: [generated]
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negative:
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phase: parse
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type: SyntaxError
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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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AssignmentElement : DestructuringAssignmentTarget Initializer_opt
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DestructuringAssignmentTarget : LeftHandSideExpression
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Static Semantics: Early Errors
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OptionalExpression:
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MemberExpression OptionalChain
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CallExpression OptionalChain
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OptionalExpression OptionalChain
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OptionalChain:
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?. [ Expression ]
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?. IdentifierName
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?. Arguments
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?. TemplateLiteral
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OptionalChain [ Expression ]
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OptionalChain .IdentifierName
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OptionalChain Arguments
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OptionalChain TemplateLiteral
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DestructuringAssignmentTarget : LeftHandSideExpression
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- It is a Syntax Error if LeftHandSideExpression is neither an ObjectLiteral nor an ArrayLiteral and IsValidSimpleAssignmentTarget(LeftHandSideExpression) is not true.
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Static Semantics: IsValidSimpleAssignmentTarget
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LeftHandSideExpression : OptionalExpression
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1. Return false.
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---*/
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$DONOTEVALUATE();
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var x = {};
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0, [x?.y = 42] = [23];
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