async-gen-decl-dstr-obj-prop-elem-init-fn-name-class.js (2250B)
1 // |reftest| async 2 // This file was procedurally generated from the following sources: 3 // - src/dstr-assignment-for-await/obj-prop-elem-init-fn-name-class.case 4 // - src/dstr-assignment-for-await/default/async-gen-decl.template 5 /*--- 6 description: Assignment of function `name` attribute (ClassExpression) (for-await-of statement in an async generator declaration) 7 esid: sec-for-in-and-for-of-statements-runtime-semantics-labelledevaluation 8 features: [class, 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 AssignmentElement[Yield] : DestructuringAssignmentTarget Initializeropt 30 [...] 6. If Initializer is present and v is undefined and 31 IsAnonymousFunctionDefinition(Initializer) and IsIdentifierRef of 32 DestructuringAssignmentTarget are both true, then 33 a. Let hasNameProperty be ? HasOwnProperty(rhsValue, "name"). 34 b. If hasNameProperty is false, perform SetFunctionName(rhsValue, GetReferencedName(lref)). 35 36 ---*/ 37 let xCls, cls, xCls2; 38 39 let iterCount = 0; 40 async function * fn() { 41 for await ({ x: xCls = class x {}, x: cls = class {}, x: xCls2 = class { static name() {} } } of [{}]) { 42 assert.notSameValue(xCls.name, 'xCls'); 43 assert.notSameValue(xCls2.name, 'xCls2'); 44 45 verifyProperty(cls, 'name', { 46 enumerable: false, 47 writable: false, 48 configurable: true, 49 value: 'cls' 50 }); 51 iterCount += 1; 52 } 53 } 54 55 let promise = fn().next(); 56 57 promise 58 .then(() => assert.sameValue(iterCount, 1, 'iteration occurred as expected'), $DONE) 59 .then($DONE, $DONE);