async-gen-dstr-let-async-obj-ptrn-id-init-fn-name-fn.js (2275B)
1 // |reftest| async 2 // This file was procedurally generated from the following sources: 3 // - src/dstr-binding-for-await/obj-ptrn-id-init-fn-name-fn.case 4 // - src/dstr-binding-for-await/default/for-await-of-async-gen-let-async.template 5 /*--- 6 description: SingleNameBinding assigns name to "anonymous" functions (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 ( ForDeclaration of AssignmentExpression ) Statement 13 14 [...] 15 2. Return ? ForIn/OfBodyEvaluation(ForDeclaration, Statement, keyResult, 16 lexicalBinding, 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 [...] 32 iii. Else, 33 1. Assert: lhsKind is lexicalBinding. 34 2. Assert: lhs is a ForDeclaration. 35 3. Let status be the result of performing BindingInitialization 36 for lhs passing nextValue and iterationEnv as arguments. 37 [...] 38 39 13.3.3.7 Runtime Semantics: KeyedBindingInitialization 40 41 SingleNameBinding : BindingIdentifier Initializer_opt 42 43 [...] 44 6. If Initializer is present and v is undefined, then 45 [...] 46 d. If IsAnonymousFunctionDefinition(Initializer) is true, then 47 i. Let hasNameProperty be HasOwnProperty(v, "name"). 48 ii. ReturnIfAbrupt(hasNameProperty). 49 iii. If hasNameProperty is false, perform SetFunctionName(v, 50 bindingId). 51 ---*/ 52 53 var iterCount = 0; 54 var asyncIter = (async function*() { 55 yield* [{}]; 56 })(); 57 58 async function *fn() { 59 for await (let { fn = function () {}, xFn = function x() {} } of asyncIter) { 60 assert.sameValue(fn.name, 'fn'); 61 assert.notSameValue(xFn.name, 'xFn'); 62 63 iterCount += 1; 64 } 65 } 66 67 fn().next() 68 .then(() => assert.sameValue(iterCount, 1, 'iteration occurred as expected'), $DONE) 69 .then($DONE, $DONE);