js/src/tests/test262/language/statements/for-of/dstr/obj-rest-empty-obj.js


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// This file was procedurally generated from the following sources:
// - src/dstr-assignment/obj-rest-empty-obj.case
// - src/dstr-assignment/default/for-of.template
/*---
description: RestBindingInitialization creates a new object even if lhs is an empty object (For..of statement)
esid: sec-for-in-and-for-of-statements-runtime-semantics-labelledevaluation
features: [object-rest, destructuring-binding]
flags: [generated]
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.
    [...]
---*/
var rest;


var counter = 0;

for ({...rest} of [{}]) {
  assert.notSameValue(rest, undefined);
  assert.notSameValue(rest, null);
  assert.sameValue(typeof rest, "object");

  counter += 1;
}

assert.sameValue(counter, 1);

reportCompare(0, 0);