named-dflt-obj-ptrn-prop-id.js (1238B)
1 // |reftest| async 2 // This file was procedurally generated from the following sources: 3 // - src/dstr-binding/obj-ptrn-prop-id.case 4 // - src/dstr-binding/default/async-gen-func-named-expr-dflt.template 5 /*--- 6 description: Binding as specified via property name and identifier (async generator named function expression (default parameter)) 7 esid: sec-asyncgenerator-definitions-evaluation 8 features: [async-iteration] 9 flags: [generated, async] 10 info: | 11 AsyncGeneratorExpression : async [no LineTerminator here] function * BindingIdentifier 12 ( FormalParameters ) { AsyncGeneratorBody } 13 14 [...] 15 7. Let closure be ! AsyncGeneratorFunctionCreate(Normal, FormalParameters, 16 AsyncGeneratorBody, funcEnv, strict). 17 [...] 18 19 20 13.3.3.7 Runtime Semantics: KeyedBindingInitialization 21 22 SingleNameBinding : BindingIdentifier Initializeropt 23 24 [...] 25 8. Return InitializeReferencedBinding(lhs, v). 26 ---*/ 27 28 29 var callCount = 0; 30 var f; 31 f = async function* h({ x: y } = { x: 23 }) { 32 assert.sameValue(y, 23); 33 assert.throws(ReferenceError, function() { 34 x; 35 }); 36 callCount = callCount + 1; 37 }; 38 39 f().next().then(() => { 40 assert.sameValue(callCount, 1, 'invoked exactly once'); 41 }).then($DONE, $DONE);