async-gen-meth-dflt-obj-ptrn-prop-obj-value-null.js (2228B)
1 // This file was procedurally generated from the following sources: 2 // - src/dstr-binding/obj-ptrn-prop-obj-value-null.case 3 // - src/dstr-binding/error/cls-expr-async-gen-meth-dflt.template 4 /*--- 5 description: Object binding pattern with "nested" object binding pattern taking the `null` value (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 [...] 45 3. If Initializer is present and v is undefined, then 46 [...] 47 4. Return the result of performing BindingInitialization for BindingPattern 48 passing v and environment as arguments. 49 ---*/ 50 51 52 var C = class { 53 async *method({ w: { x, y, z } = { x: 4, y: 5, z: 6 } } = { w: null }) { 54 55 } 56 }; 57 58 var method = C.prototype.method; 59 60 assert.throws(TypeError, function() { 61 method(); 62 }); 63 64 reportCompare(0, 0);