"class" as a thing that can be inherited

[phoneyDev (Stern)]

It's been deprecated, or something.

Class-only protocols, class vs AnyObject?

What is the difference, if any, btw P and Q here: protocol P : class { ... } protocol Q : AnyObject { ... } If no difference, which should be preferred? (I got the impression that the class version was meant to be deprecated, but it still compiles without warnings as of Xcode 9.3)