// |reftest| async // This file was procedurally generated from the following sources: // - src/dstr-binding-for-await/ary-ptrn-elision-exhausted.case // - src/dstr-binding-for-await/default/for-await-of-async-gen-var.template /*--- description: Elision accepts exhausted iterator (for-await-of statement) esid: sec-for-in-and-for-of-statements-runtime-semantics-labelledevaluation features: [generators, destructuring-binding, async-iteration] flags: [generated, async] info: | IterationStatement : for await ( var ForBinding of AssignmentExpression ) Statement [...] 2. Return ? ForIn/OfBodyEvaluation(ForBinding, Statement, keyResult, varBinding, labelSet, async). 13.7.5.13 Runtime Semantics: ForIn/OfBodyEvaluation [...] 4. Let destructuring be IsDestructuring of lhs. [...] 6. Repeat [...] j. If destructuring is false, then [...] k. Else i. If lhsKind is assignment, then [...] ii. Else if lhsKind is varBinding, then 1. Assert: lhs is a ForBinding. 2. Let status be the result of performing BindingInitialization for lhs passing nextValue and undefined as the arguments. [...] 13.3.3.6 Runtime Semantics: IteratorBindingInitialization ArrayBindingPattern : [ Elision ] 1. Return the result of performing IteratorDestructuringAssignmentEvaluation of Elision with iteratorRecord as the argument. 12.14.5.3 Runtime Semantics: IteratorDestructuringAssignmentEvaluation Elision : , 1. If iteratorRecord.[[done]] is false, then [...] 2. Return NormalCompletion(empty). ---*/ var iter = function*() {}(); iter.next(); var iterCount = 0; async function *fn() { for await (var [,] of [iter]) { iterCount += 1; } } fn().next() .then(() => assert.sameValue(iterCount, 1, 'iteration occurred as expected'), $DONE) .then($DONE, $DONE);