async-gen-dstr-var-ary-ptrn-elem-ary-elem-iter.js (2071B)
1 // |reftest| async 2 // This file was procedurally generated from the following sources: 3 // - src/dstr-binding-for-await/ary-ptrn-elem-ary-elem-iter.case 4 // - src/dstr-binding-for-await/default/for-await-of-async-gen-var.template 5 /*--- 6 description: BindingElement with array binding pattern and initializer is not used (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 BindingElement : BindingPattern Initializer_opt 39 40 1. If iteratorRecord.[[done]] is false, then 41 a. Let next be IteratorStep(iteratorRecord.[[iterator]]). 42 [...] 43 e. Else, 44 i. Let v be IteratorValue(next). 45 [...] 46 4. Return the result of performing BindingInitialization of BindingPattern 47 with v and environment as the arguments. 48 ---*/ 49 50 var iterCount = 0; 51 52 async function *fn() { 53 for await (var [[x, y, z] = [4, 5, 6]] of [[[7, 8, 9]]]) { 54 assert.sameValue(x, 7); 55 assert.sameValue(y, 8); 56 assert.sameValue(z, 9); 57 58 iterCount += 1; 59 } 60 } 61 62 fn().next() 63 .then(() => assert.sameValue(iterCount, 1, 'iteration occurred as expected'), $DONE) 64 .then($DONE, $DONE);