JSTests/test262/test/language/statements/for/dstr-var-ary-name-iter-val.js

// This file was procedurally generated from the following sources:
// - src/dstr-binding/ary-name-iter-val.case
// - src/dstr-binding/default/for-var.template
/*---
description: SingleNameBinding with normal value iteration (for statement)
esid: sec-for-statement-runtime-semantics-labelledevaluation
es6id: 13.7.4.7
features: [destructuring-binding]
flags: [generated]
info: |
    IterationStatement :
        for ( var VariableDeclarationList ; Expressionopt ; Expressionopt ) Statement

    1. Let varDcl be the result of evaluating VariableDeclarationList.
    [...]

    13.3.2.4 Runtime Semantics: Evaluation

    VariableDeclarationList : VariableDeclarationList , VariableDeclaration

    1. Let next be the result of evaluating VariableDeclarationList.
    2. ReturnIfAbrupt(next).
    3. Return the result of evaluating VariableDeclaration.

    VariableDeclaration : BindingPattern Initializer

    1. Let rhs be the result of evaluating Initializer.
    2. Let rval be GetValue(rhs).
    3. ReturnIfAbrupt(rval).
    4. Return the result of performing BindingInitialization for BindingPattern
       passing rval and undefined as arguments.

    13.3.3.6 Runtime Semantics: IteratorBindingInitialization

    SingleNameBinding : BindingIdentifier Initializeropt

    [...]
    4. If iteratorRecord.[[done]] is false, then
       a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
       b. If next is an abrupt completion, set iteratorRecord.[[done]] to true.
       c. ReturnIfAbrupt(next).
       d. If next is false, set iteratorRecord.[[done]] to true.
       e. Else,
          [...]
          i. Let v be IteratorValue(next).
          ii. If v is an abrupt completion, set
              iteratorRecord.[[done]] to true.
          iii. ReturnIfAbrupt(v).
    5. If iteratorRecord.[[done]] is true, let v be undefined.
    [...]
    8. Return InitializeReferencedBinding(lhs, v).
---*/

var iterCount = 0;

for (var [x, y, z] = [1, 2, 3]; iterCount < 1; ) {
  assert.sameValue(x, 1);
  assert.sameValue(y, 2);
  assert.sameValue(z, 3);
  iterCount += 1;
}

assert.sameValue(iterCount, 1, 'Iteration occurred as expected');