There was a typo in the code I posted:
> >class Fail >data This_should_never_happen >
should read:
> >class Fail x >data This_should_never_happen >
Keean. _______________________________________________ Glasgow-haskell-users mailing list Glasgow-haskell-users@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-users