How about a "deriving defaulted" deriving strategy

I was just doing the usual incantation for an exception type: data DatagramException = ... deriving stock (Eq,Show) instance Exception Datagram And it suddenly hit me what a shame it was that I cannot put the Exception instance in a deriving clause like the others. It would be more visually pleasing to write: data DatagramException = ... deriving stock (Eq,Show) deriving defaulted (Exception) -- -Andrew Thaddeus Martin