I've been frustrated by the same lack of instances; as a stopgap, here's one for a three-tuple. The pattern is pretty clear and can easily be extended to whatever size you'd like.
tupCon = mkConstr 1 "(,,)" Prefix instance (Data a, Data b, Data c) => Data (a, b ,c) where gfoldl k z (a, b, c) = ((z (,,) `k` a) `k` b) `k` c toConstr _ = tupCon fromConstr _ = (undefined, undefined, undefined) dataTypeOf _ = mkDataType [tupCon] MR K P SCHUPKE <[EMAIL PROTECTED]> writes: > >Any chance of Data instances for tuples of size >greater than 2... One of the nice things about generics is >you can use them by deriving Data on your datatypes - of >course this doesn't work if you all of a sudden have to >put a load of boiler-plate in just to use tuples... > > Regards, > Keean Schupke >_______________________________________________ >Glasgow-haskell-users mailing list >[EMAIL PROTECTED] >http://www.haskell.org/mailman/listinfo/glasgow-haskell-users > _______________________________________________ Glasgow-haskell-users mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/glasgow-haskell-users