mirror of https://github.com/tc39/test262.git
66 lines
2.3 KiB
JavaScript
66 lines
2.3 KiB
JavaScript
// This file was procedurally generated from the following sources:
|
|
// - src/dstr-assignment/array-elem-nested-memberexpr-optchain-prop-ref-init.case
|
|
// - src/dstr-assignment/syntax/for-in.template
|
|
/*---
|
|
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) (For..in statement)
|
|
esid: sec-for-in-and-for-of-statements-runtime-semantics-labelledevaluation
|
|
features: [optional-chaining, destructuring-binding]
|
|
flags: [generated]
|
|
negative:
|
|
phase: parse
|
|
type: SyntaxError
|
|
info: |
|
|
IterationStatement :
|
|
for ( LeftHandSideExpression of AssignmentExpression ) Statement
|
|
|
|
1. Let keyResult be the result of performing ? ForIn/OfHeadEvaluation(« »,
|
|
AssignmentExpression, iterate).
|
|
2. Return ? ForIn/OfBodyEvaluation(LeftHandSideExpression, Statement,
|
|
keyResult, assignment, labelSet).
|
|
|
|
13.7.5.13 Runtime Semantics: ForIn/OfBodyEvaluation
|
|
|
|
[...]
|
|
4. If destructuring is true and if lhsKind is assignment, then
|
|
a. Assert: lhs is a LeftHandSideExpression.
|
|
b. Let assignmentPattern be the parse of the source text corresponding to
|
|
lhs using AssignmentPattern as the goal symbol.
|
|
[...]
|
|
|
|
Syntax
|
|
|
|
AssignmentElement : DestructuringAssignmentTarget Initializer_opt
|
|
DestructuringAssignmentTarget : LeftHandSideExpression
|
|
|
|
Static Semantics: Early Errors
|
|
|
|
OptionalExpression:
|
|
MemberExpression OptionalChain
|
|
CallExpression OptionalChain
|
|
OptionalExpression OptionalChain
|
|
|
|
OptionalChain:
|
|
?. [ Expression ]
|
|
?. IdentifierName
|
|
?. Arguments
|
|
?. TemplateLiteral
|
|
OptionalChain [ Expression ]
|
|
OptionalChain .IdentifierName
|
|
OptionalChain Arguments
|
|
OptionalChain TemplateLiteral
|
|
|
|
DestructuringAssignmentTarget : LeftHandSideExpression
|
|
|
|
- It is a Syntax Error if LeftHandSideExpression is neither an ObjectLiteral nor an ArrayLiteral and IsValidSimpleAssignmentTarget(LeftHandSideExpression) is not true.
|
|
|
|
Static Semantics: IsValidSimpleAssignmentTarget
|
|
|
|
LeftHandSideExpression : OptionalExpression
|
|
1. Return false.
|
|
|
|
---*/
|
|
$DONOTEVALUATE();
|
|
var x = {};
|
|
|
|
for ([x?.y = 42] in [[23]]) ;
|