On Mon, Jun 6, 2011 at 7:52 AM, Yitzchak Gale <g...@sefer.org> wrote: > You almost never want to use UndecidableInstances > when writing practical programs in Haskell.
Surprisingly enough, mtl uses UndecidableInstances, so almost every practical Haskell program uses it in one way or another. G -- Gregory Collins <g...@gregorycollins.net> _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
