Swift Switch case “not”

Question

I\'ve got two enums:

public enum ServerState {
  case Connecting
  case Open
  case LoggedIn
  case Closed
  case Error(NSError)
}

enum TransportLayerState          


        

Answer 1

One possible answer I found was to make TransportLayerState equatable. In that case I could do this:

switch serverState {
case .Connecting where tlState != .Connecting: return false
case .Closed where tlState != .Disconnected(nil): return false
case let .Error(err) where tlState != .Diconnected(err): return false
...
default: return true
}

I do end up having to write a bit of code in TransportLayerState enum to make it equatable, so not sure if it's worth the effort, but it does work.