async-gen-decl-dstr-obj-id-init-fn-name-arrow.js (2034B)
1 // |reftest| async 2 // This file was procedurally generated from the following sources: 3 // - src/dstr-assignment-for-await/obj-id-init-fn-name-arrow.case 4 // - src/dstr-assignment-for-await/default/async-gen-decl.template 5 /*--- 6 description: Assignment of function `name` attribute (ArrowFunction) (for-await-of statement in an async generator declaration) 7 esid: sec-for-in-and-for-of-statements-runtime-semantics-labelledevaluation 8 features: [destructuring-binding, async-iteration] 9 flags: [generated, async] 10 includes: [propertyHelper.js] 11 info: | 12 IterationStatement : 13 for await ( LeftHandSideExpression of AssignmentExpression ) Statement 14 15 1. Let keyResult be the result of performing ? ForIn/OfHeadEvaluation(« », 16 AssignmentExpression, iterate). 17 2. Return ? ForIn/OfBodyEvaluation(LeftHandSideExpression, Statement, 18 keyResult, assignment, labelSet). 19 20 13.7.5.13 Runtime Semantics: ForIn/OfBodyEvaluation 21 22 [...] 23 5. If destructuring is true and if lhsKind is assignment, then 24 a. Assert: lhs is a LeftHandSideExpression. 25 b. Let assignmentPattern be the parse of the source text corresponding to 26 lhs using AssignmentPattern as the goal symbol. 27 [...] 28 29 AssignmentProperty : IdentifierReference Initializeropt 30 [...] 6. If Initializeropt is present and v is undefined, then 31 [...] 32 d. If IsAnonymousFunctionDefinition(Initializer) is true, then 33 i. Let hasNameProperty be HasOwnProperty(v, "name"). 34 ii. ReturnIfAbrupt(hasNameProperty). 35 iii. If hasNameProperty is false, perform SetFunctionName(v, P). 36 37 ---*/ 38 let arrow; 39 40 let iterCount = 0; 41 async function * fn() { 42 for await ({ arrow = () => {} } of [{}]) { 43 verifyProperty(arrow, 'name', { 44 enumerable: false, 45 writable: false, 46 configurable: true, 47 value: 'arrow' 48 }); 49 50 iterCount += 1; 51 } 52 } 53 54 let promise = fn().next(); 55 56 promise 57 .then(() => assert.sameValue(iterCount, 1, 'iteration occurred as expected'), $DONE) 58 .then($DONE, $DONE);