// This file was procedurally generated from the following sources: // - src/dstr-binding/obj-ptrn-prop-id-init.case // - src/dstr-binding/default/gen-func-decl-dflt.template /*--- description: Binding as specified via property name, identifier, and initializer (generator function declaration (default parameter)) esid: sec-generator-function-definitions-runtime-semantics-instantiatefunctionobject features: [generators, destructuring-binding, default-parameters] 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 [...] 8. Return InitializeReferencedBinding(lhs, v). ---*/ var callCount = 0; function* f({ x: y = 33 } = { }) { assert.sameValue(y, 33); assert.throws(ReferenceError, function() { x; }); callCount = callCount + 1; }; f().next(); assert.sameValue(callCount, 1, 'generator function invoked exactly once'); reportCompare(0, 0);