Subclass.fetchRequest() Swift 3.0, extension not really helping 100%?

Question

according to the new Core Data changes, Xcode generates this subclass for me:

extension Person {

    @nonobjc public class func fetchRequest() -> NSFetch         


        

Answer 1

The reason is the generic type. NSFetchRequest has been turned into a generic to avoid a lot of type casting.

If the function doesn't take any parameter so the concrete type (Person) cannot be passed directly and the return type is also a generic it must be annotated explicitly.