async-gen-meth-dflt-ary-ptrn-elem-obj-val-undef.js (2358B)
1 // This file was procedurally generated from the following sources: 2 // - src/dstr-binding/ary-ptrn-elem-obj-val-undef.case 3 // - src/dstr-binding/error/cls-decl-async-gen-meth-dflt.template 4 /*--- 5 description: Nested object destructuring with a value of `undefined` (class expression async generator method (default parameters)) 6 esid: sec-class-definitions-runtime-semantics-evaluation 7 features: [async-iteration] 8 flags: [generated] 9 info: | 10 ClassDeclaration : class BindingIdentifier ClassTail 11 12 1. Let className be StringValue of BindingIdentifier. 13 2. Let value be the result of ClassDefinitionEvaluation of ClassTail with 14 argument className. 15 [...] 16 17 14.5.14 Runtime Semantics: ClassDefinitionEvaluation 18 19 21. For each ClassElement m in order from methods 20 a. If IsStatic of m is false, then 21 i. Let status be the result of performing 22 PropertyDefinitionEvaluation for m with arguments proto and 23 false. 24 [...] 25 26 Runtime Semantics: PropertyDefinitionEvaluation 27 28 AsyncGeneratorMethod : 29 async [no LineTerminator here] * PropertyName ( UniqueFormalParameters ) 30 { AsyncGeneratorBody } 31 32 1. Let propKey be the result of evaluating PropertyName. 33 2. ReturnIfAbrupt(propKey). 34 3. If the function code for this AsyncGeneratorMethod is strict mode code, let strict be true. 35 Otherwise let strict be false. 36 4. Let scope be the running execution context's LexicalEnvironment. 37 5. Let closure be ! AsyncGeneratorFunctionCreate(Method, UniqueFormalParameters, 38 AsyncGeneratorBody, scope, strict). 39 [...] 40 41 13.3.3.6 Runtime Semantics: IteratorBindingInitialization 42 43 BindingElement : BindingPattern Initializeropt 44 45 1. If iteratorRecord.[[done]] is false, then 46 [...] 47 e. Else 48 i. Let v be IteratorValue(next). 49 [...] 50 4. Return the result of performing BindingInitialization of BindingPattern 51 with v and environment as the arguments. 52 53 13.3.3.5 Runtime Semantics: BindingInitialization 54 55 BindingPattern : ObjectBindingPattern 56 57 1. Let valid be RequireObjectCoercible(value). 58 2. ReturnIfAbrupt(valid). 59 ---*/ 60 61 62 class C { 63 async *method([{ x }] = []) { 64 65 } 66 }; 67 68 var method = C.prototype.method; 69 70 assert.throws(TypeError, function() { 71 method(); 72 }); 73 74 reportCompare(0, 0);