On Thu, May 31, 2007 at 09:04:30PM +0200, Tomasz Zielonka wrote: > On Thu, May 31, 2007 at 06:16:20PM +0100, Jon Harrop wrote: > > > I can't think of a lightweight way to encode overlapping enumerations in > > > Haskell. > > > > I'd like to know if this is possible in Haskell. > > Maybe this way using GADTs and typeclasses? I haven't used such code in > practice - there may be some hidden traps.
Let me be the first one to admit that this approach is highly unmodular - you have to define all cases in one place, or at least each group of overlapping enum types. Best regards Tomek _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
