async-func-dstr-var-ary-ptrn-elem-id-init-fn-name-cover.js (2172B)
1 // |reftest| async 2 // This file was procedurally generated from the following sources: 3 // - src/dstr-binding-for-await/ary-ptrn-elem-id-init-fn-name-cover.case 4 // - src/dstr-binding-for-await/default/for-await-of-async-func-var.template 5 /*--- 6 description: SingleNameBinding does assign name to "anonymous" functions "through" cover grammar (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 5. If Initializer is present and v is undefined, then 42 a. Let defaultValue be the result of evaluating Initializer. 43 b. Set v to ? GetValue(defaultValue). 44 c. If IsAnonymousFunctionDefinition(Initializer) is true, then 45 [...] 46 6. If environment is undefined, return PutValue(lhs, v). 47 7. Return InitializeReferencedBinding(lhs, v). 48 ---*/ 49 50 var iterCount = 0; 51 52 async function fn() { 53 for await (var [cover = (function () {}), xCover = (0, function() {})] of [[]]) { 54 assert.sameValue(cover.name, 'cover'); 55 assert.notSameValue(xCover.name, 'xCover'); 56 57 iterCount += 1; 58 } 59 } 60 61 fn() 62 .then(() => assert.sameValue(iterCount, 1, 'iteration occurred as expected'), $DONE) 63 .then($DONE, $DONE);