tor-browser

The Tor Browser
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array-elem-nested-memberexpr-optchain-prop-ref-init.js (2395B)

      1 // |reftest| error:SyntaxError
      2 // This file was procedurally generated from the following sources:
      3 // - src/dstr-assignment/array-elem-nested-memberexpr-optchain-prop-ref-init.case
      4 // - src/dstr-assignment/syntax/for-in.template
      5 /*---
      6 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)
      7 esid: sec-for-in-and-for-of-statements-runtime-semantics-labelledevaluation
      8 features: [optional-chaining, destructuring-binding]
      9 flags: [generated]
     10 negative:
     11  phase: parse
     12  type: SyntaxError
     13 info: |
     14    IterationStatement :
     15      for ( LeftHandSideExpression of AssignmentExpression ) Statement
     16 
     17    1. Let keyResult be the result of performing ? ForIn/OfHeadEvaluation(« »,
     18       AssignmentExpression, iterate).
     19    2. Return ? ForIn/OfBodyEvaluation(LeftHandSideExpression, Statement,
     20       keyResult, assignment, labelSet).
     21 
     22    13.7.5.13 Runtime Semantics: ForIn/OfBodyEvaluation
     23 
     24    [...]
     25    4. If destructuring is true and if lhsKind is assignment, then
     26       a. Assert: lhs is a LeftHandSideExpression.
     27       b. Let assignmentPattern be the parse of the source text corresponding to
     28          lhs using AssignmentPattern as the goal symbol.
     29    [...]
     30 
     31    Syntax
     32 
     33    AssignmentElement : DestructuringAssignmentTarget Initializer_opt
     34    DestructuringAssignmentTarget : LeftHandSideExpression
     35 
     36    Static Semantics: Early Errors
     37 
     38    OptionalExpression:
     39      MemberExpression OptionalChain
     40      CallExpression OptionalChain
     41      OptionalExpression OptionalChain
     42 
     43    OptionalChain:
     44      ?. [ Expression ]
     45      ?. IdentifierName
     46      ?. Arguments 
     47      ?. TemplateLiteral
     48      OptionalChain [ Expression ]
     49      OptionalChain .IdentifierName
     50      OptionalChain Arguments 
     51      OptionalChain TemplateLiteral
     52 
     53    DestructuringAssignmentTarget : LeftHandSideExpression
     54 
     55    - It is a Syntax Error if LeftHandSideExpression is neither an ObjectLiteral nor an ArrayLiteral and IsValidSimpleAssignmentTarget(LeftHandSideExpression) is not true.
     56 
     57    Static Semantics: IsValidSimpleAssignmentTarget
     58 
     59    LeftHandSideExpression : OptionalExpression
     60      1. Return false.
     61 
     62 ---*/
     63 $DONOTEVALUATE();
     64 var x = {};
     65 
     66 for ([x?.y = 42] in [[23]]) ;