| // This file was procedurally generated from the following sources: |
| // - src/dstr-binding/obj-ptrn-id-init-fn-name-cover.case |
| // - src/dstr-binding/default/gen-func-decl.template |
| /*--- |
| description: SingleNameBinding assigns `name` to "anonymous" functions "through" cover grammar (generator function declaration) |
| esid: sec-generator-function-definitions-runtime-semantics-instantiatefunctionobject |
| features: [generators, destructuring-binding] |
| flags: [generated] |
| info: | |
| GeneratorDeclaration : function * ( FormalParameters ) { GeneratorBody } |
| |
| [...] |
| 2. Let F be GeneratorFunctionCreate(Normal, FormalParameters, |
| GeneratorBody, scope, strict). |
| [...] |
| |
| 9.2.1 [[Call]] ( thisArgument, argumentsList) |
| |
| [...] |
| 7. Let result be OrdinaryCallEvaluateBody(F, argumentsList). |
| [...] |
| |
| 9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList ) |
| |
| 1. Let status be FunctionDeclarationInstantiation(F, argumentsList). |
| [...] |
| |
| 9.2.12 FunctionDeclarationInstantiation(func, argumentsList) |
| |
| [...] |
| 23. Let iteratorRecord be Record {[[iterator]]: |
| CreateListIterator(argumentsList), [[done]]: false}. |
| 24. If hasDuplicates is true, then |
| [...] |
| 25. Else, |
| b. Let formalStatus be IteratorBindingInitialization for formals with |
| iteratorRecord and env as arguments. |
| [...] |
| |
| 13.3.3.7 Runtime Semantics: KeyedBindingInitialization |
| |
| SingleNameBinding : BindingIdentifier Initializeropt |
| |
| [...] |
| 6. If Initializer is present and v is undefined, then |
| [...] |
| d. If IsAnonymousFunctionDefinition(Initializer) is true, then |
| i. Let hasNameProperty be HasOwnProperty(v, "name"). |
| ii. ReturnIfAbrupt(hasNameProperty). |
| iii. If hasNameProperty is false, perform SetFunctionName(v, |
| bindingId). |
| ---*/ |
| |
| var callCount = 0; |
| function* f({ cover = (function () {}), xCover = (0, function() {}) }) { |
| assert.sameValue(cover.name, 'cover'); |
| assert.notSameValue(xCover.name, 'xCover'); |
| callCount = callCount + 1; |
| }; |
| f({}).next(); |
| assert.sameValue(callCount, 1, 'generator function invoked exactly once'); |