On Tue, Dec 23, 2008 at 12:53 AM, Luke Palmer <lrpal...@gmail.com> wrote: > On Mon, Dec 22, 2008 at 6:52 PM, Antoine Latter <aslat...@gmail.com> wrote: >> Although I still had to use my own because I wanted a MonadPlus >> instance. I would offer a patch, but since there's more than one >> useful MonadPlus instance for MaybeT it probably still wouldn't be >> right for everyone. > > There are? The only two I can think of are the left-biased and its dual, in > which case the convention is to choose the left-biased one. Is there > another? >
It's a monad-transformer, so the MonadPlus/Alternative instance could either apply Maybe semantics or lift the behavior of whatever it wraps. -Antoine _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
