async-gen-dstr-var-obj-ptrn-id-trailing-comma.js (1708B)
1 // |reftest| async 2 // This file was procedurally generated from the following sources: 3 // - src/dstr-binding-for-await/obj-ptrn-id-trailing-comma.case 4 // - src/dstr-binding-for-await/default/for-await-of-async-gen-var.template 5 /*--- 6 description: Trailing comma is allowed following BindingPropertyList (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 Destructuring Binding Patterns 37 38 ObjectBindingPattern[Yield] : 39 { } 40 { BindingPropertyList[?Yield] } 41 { BindingPropertyList[?Yield] , } 42 ---*/ 43 44 var iterCount = 0; 45 46 async function *fn() { 47 for await (var { x, } of [{ x: 23 }]) { 48 assert.sameValue(x, 23); 49 50 iterCount += 1; 51 } 52 } 53 54 fn().next() 55 .then(() => assert.sameValue(iterCount, 1, 'iteration occurred as expected'), $DONE) 56 .then($DONE, $DONE);