On Thu, Dec 08, 2005 at 05:31:37PM -0500, Thomas Jger wrote:
Since you're already using GADTs, why not also use them to witness type
equality:
Thanks for the suggestion! This just illustrates the rule that when using
GADTs the solution to every problem is to introduce another GADT. It
amazes
Hello,
Since you're already using GADTs, why not also use them to witness type
equality:
import GHC.Exts
data Patch a b = Patch Int Int
data Sequential a c where
Sequential :: Patch a b - Patch b c - Sequential a c
data MaybeEq :: * - * - * where
NotEq :: MaybeEq a b
IsEq :: MaybeEq
