async-func-dstr-var-ary-ptrn-elem-id-iter-complete.js (2103B)
1 // |reftest| async 2 // This file was procedurally generated from the following sources: 3 // - src/dstr-binding-for-await/ary-ptrn-elem-id-iter-complete.case 4 // - src/dstr-binding-for-await/default/for-await-of-async-func-var.template 5 /*--- 6 description: SingleNameBinding when value iteration completes (for-await-of statement) 7 esid: sec-for-in-and-for-of-statements-runtime-semantics-labelledevaluation 8 features: [destructuring-binding, async-iteration] 9 flags: [generated, async] 10 info: | 11 IterationStatement : 12 for await ( var ForBinding of AssignmentExpression ) Statement 13 14 [...] 15 2. Return ? ForIn/OfBodyEvaluation(ForBinding, Statement, keyResult, 16 varBinding, labelSet, async). 17 18 13.7.5.13 Runtime Semantics: ForIn/OfBodyEvaluation 19 20 [...] 21 4. Let destructuring be IsDestructuring of lhs. 22 [...] 23 6. Repeat 24 [...] 25 j. If destructuring is false, then 26 [...] 27 k. Else 28 i. If lhsKind is assignment, then 29 [...] 30 ii. Else if lhsKind is varBinding, then 31 1. Assert: lhs is a ForBinding. 32 2. Let status be the result of performing BindingInitialization 33 for lhs passing nextValue and undefined as the arguments. 34 [...] 35 36 13.3.3.6 Runtime Semantics: IteratorBindingInitialization 37 38 SingleNameBinding : BindingIdentifier Initializer_opt 39 40 [...] 41 3. If iteratorRecord.[[done]] is false, then 42 a. Let next be IteratorStep(iteratorRecord.[[iterator]]). 43 b. If next is an abrupt completion, set iteratorRecord.[[done]] to true. 44 c. ReturnIfAbrupt(next). 45 d. If next is false, set iteratorRecord.[[done]] to true. 46 e. Else, 47 [...] 48 4. If iteratorRecord.[[done]] is true, let v be undefined. 49 [...] 50 7. Return InitializeReferencedBinding(lhs, v). 51 ---*/ 52 53 var iterCount = 0; 54 55 async function fn() { 56 for await (var [x] of [[]]) { 57 assert.sameValue(x, undefined); 58 59 iterCount += 1; 60 } 61 } 62 63 fn() 64 .then(() => assert.sameValue(iterCount, 1, 'iteration occurred as expected'), $DONE) 65 .then($DONE, $DONE);