named-dflt-obj-ptrn-prop-obj-value-undef.js (1191B)
1 // This file was procedurally generated from the following sources: 2 // - src/dstr-binding/obj-ptrn-prop-obj-value-undef.case 3 // - src/dstr-binding/error/async-gen-func-named-expr-dflt.template 4 /*--- 5 description: Object binding pattern with "nested" object binding pattern taking the `null` value (async generator named function expression (default parameter)) 6 esid: sec-asyncgenerator-definitions-evaluation 7 features: [async-iteration] 8 flags: [generated] 9 info: | 10 AsyncGeneratorExpression : async [no LineTerminator here] function * BindingIdentifier 11 ( FormalParameters ) { AsyncGeneratorBody } 12 13 [...] 14 7. Let closure be ! AsyncGeneratorFunctionCreate(Normal, FormalParameters, 15 AsyncGeneratorBody, funcEnv, strict). 16 [...] 17 18 13.3.3.7 Runtime Semantics: KeyedBindingInitialization 19 20 [...] 21 3. If Initializer is present and v is undefined, then 22 [...] 23 4. Return the result of performing BindingInitialization for BindingPattern 24 passing v and environment as arguments. 25 ---*/ 26 27 28 var f; 29 f = async function* h({ w: { x, y, z } = undefined } = { }) { 30 31 }; 32 33 assert.throws(TypeError, function() { 34 f(); 35 }); 36 37 reportCompare(0, 0);