[Haskell-cafe] No Enum for (,), no Enum or Bounded for Either

I'm a bit surprised that whilst `Either` and `(,)` have instances for `Ord` * `(,)` has no instance for `Enum` * `Either` has no instance for `Enum` or `Bounded` Is there a particular reason for that? It might be tricky to implement toEnum :: Int -> a fromEnum :: a -> Int but in the presence of `Bounded` that should be possible. Tom