async-gen-meth-dflt-obj-ptrn-id-init-unresolvable.js (2444B)
1 // This file was procedurally generated from the following sources: 2 // - src/dstr-binding/obj-ptrn-id-init-unresolvable.case 3 // - src/dstr-binding/error/cls-expr-async-gen-meth-dflt.template 4 /*--- 5 description: Destructuring initializer is an unresolvable reference (class expression async generator method (default parameter)) 6 esid: sec-class-definitions-runtime-semantics-evaluation 7 features: [async-iteration] 8 flags: [generated] 9 info: | 10 ClassExpression : class BindingIdentifieropt ClassTail 11 12 1. If BindingIdentifieropt is not present, let className be undefined. 13 2. Else, let className be StringValue of BindingIdentifier. 14 3. Let value be the result of ClassDefinitionEvaluation of ClassTail 15 with argument className. 16 [...] 17 18 14.5.14 Runtime Semantics: ClassDefinitionEvaluation 19 20 21. For each ClassElement m in order from methods 21 a. If IsStatic of m is false, then 22 i. Let status be the result of performing 23 PropertyDefinitionEvaluation for m with arguments proto and 24 false. 25 [...] 26 27 Runtime Semantics: PropertyDefinitionEvaluation 28 29 AsyncGeneratorMethod : 30 async [no LineTerminator here] * PropertyName ( UniqueFormalParameters ) 31 { AsyncGeneratorBody } 32 33 1. Let propKey be the result of evaluating PropertyName. 34 2. ReturnIfAbrupt(propKey). 35 3. If the function code for this AsyncGeneratorMethod is strict mode code, let strict be true. 36 Otherwise let strict be false. 37 4. Let scope be the running execution context's LexicalEnvironment. 38 5. Let closure be ! AsyncGeneratorFunctionCreate(Method, UniqueFormalParameters, 39 AsyncGeneratorBody, scope, strict). 40 [...] 41 42 13.3.3.7 Runtime Semantics: KeyedBindingInitialization 43 44 SingleNameBinding : BindingIdentifier Initializeropt 45 46 [...] 47 6. If Initializer is present and v is undefined, then 48 a. Let defaultValue be the result of evaluating Initializer. 49 b. Let v be GetValue(defaultValue). 50 c. ReturnIfAbrupt(v). 51 52 6.2.3.1 GetValue (V) 53 54 1. ReturnIfAbrupt(V). 55 2. If Type(V) is not Reference, return V. 56 3. Let base be GetBase(V). 57 4. If IsUnresolvableReference(V), throw a ReferenceError exception. 58 ---*/ 59 60 61 var C = class { 62 async *method({ x = unresolvableReference } = {}) { 63 64 } 65 }; 66 67 var method = C.prototype.method; 68 69 assert.throws(ReferenceError, function() { 70 method(); 71 }); 72 73 reportCompare(0, 0);