obj-ptrn-prop-obj-value-undef.js (1150B)
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-decl.template 4 /*--- 5 description: Object binding pattern with "nested" object binding pattern taking the `null` value (async generator function declaration) 6 esid: sec-asyncgenerator-definitions-instantiatefunctionobject 7 features: [async-iteration] 8 flags: [generated] 9 info: | 10 AsyncGeneratorDeclaration : async [no LineTerminator here] function * BindingIdentifier 11 ( FormalParameters ) { AsyncGeneratorBody } 12 13 [...] 14 3. Let F be ! AsyncGeneratorFunctionCreate(Normal, FormalParameters, AsyncGeneratorBody, 15 scope, 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 async function* f({ w: { x, y, z } = undefined }) { 29 30 }; 31 32 assert.throws(TypeError, function() { 33 f({ }); 34 }); 35 36 reportCompare(0, 0);