IO On Thu, Dec 16, 2010 at 6:03 PM, John Smith <volderm...@hotmail.com> wrote:
> On 15/12/2010 14:31, Lennart Augustsson wrote: > >> Yes, I think there should be a MonadFail distinct from MonadPlus. >> Some types, like IO, are not in MonadPlus, but have a special >> implementation of the fail method. >> >> Personally, I think fail should just be removed, but that would break >> existing code. >> The fail method was introduced for the wrong reasons (better error >> messages was the excuse). >> > > Which other monads (other than MonadPlus subclasses) define fail? > > > > _______________________________________________ > Haskell-Cafe mailing list > Haskell-Cafe@haskell.org > http://www.haskell.org/mailman/listinfo/haskell-cafe >
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