gen-meth-obj-ptrn-prop-ary.js (2320B)
1 // This file was procedurally generated from the following sources: 2 // - src/dstr-binding/obj-ptrn-prop-ary.case 3 // - src/dstr-binding/default/gen-meth.template 4 /*--- 5 description: Object binding pattern with "nested" array binding pattern not using initializer (generator method) 6 esid: sec-generator-function-definitions-runtime-semantics-propertydefinitionevaluation 7 features: [generators, destructuring-binding] 8 flags: [generated] 9 info: | 10 GeneratorMethod : 11 * PropertyName ( StrictFormalParameters ) { GeneratorBody } 12 13 1. Let propKey be the result of evaluating PropertyName. 14 2. ReturnIfAbrupt(propKey). 15 3. If the function code for this GeneratorMethod is strict mode code, 16 let strict be true. Otherwise let strict be false. 17 4. Let scope be the running execution context's LexicalEnvironment. 18 5. Let closure be GeneratorFunctionCreate(Method, 19 StrictFormalParameters, GeneratorBody, scope, strict). 20 [...] 21 22 9.2.1 [[Call]] ( thisArgument, argumentsList) 23 24 [...] 25 7. Let result be OrdinaryCallEvaluateBody(F, argumentsList). 26 [...] 27 28 9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList ) 29 30 1. Let status be FunctionDeclarationInstantiation(F, argumentsList). 31 [...] 32 33 9.2.12 FunctionDeclarationInstantiation(func, argumentsList) 34 35 [...] 36 23. Let iteratorRecord be Record {[[iterator]]: 37 CreateListIterator(argumentsList), [[done]]: false}. 38 24. If hasDuplicates is true, then 39 [...] 40 25. Else, 41 b. Let formalStatus be IteratorBindingInitialization for formals with 42 iteratorRecord and env as arguments. 43 [...] 44 45 13.3.3.7 Runtime Semantics: KeyedBindingInitialization 46 47 [...] 48 3. If Initializer is present and v is undefined, then 49 [...] 50 4. Return the result of performing BindingInitialization for BindingPattern 51 passing v and environment as arguments. 52 ---*/ 53 54 var callCount = 0; 55 var obj = { 56 *method({ w: [x, y, z] = [4, 5, 6] }) { 57 assert.sameValue(x, 7); 58 assert.sameValue(y, undefined); 59 assert.sameValue(z, undefined); 60 61 assert.throws(ReferenceError, function() { 62 w; 63 }); 64 callCount = callCount + 1; 65 } 66 }; 67 68 obj.method({ w: [7, undefined, ] }).next(); 69 assert.sameValue(callCount, 1, 'generator method invoked exactly once'); 70 71 reportCompare(0, 0);