On 29 June 2010 15:20, Michael Snoyman <mich...@snoyman.com> wrote: > As far as I know, the only issue with depending on both is the conflicting > orphan Monad instance for Either. Can anyone either confirm or deny this?
Since you're being naughty and using package-qualified imports, it should be OK (in terms of working). > > On Tue, Jun 29, 2010 at 5:11 AM, Antoine Latter <aslat...@gmail.com> wrote: >> >> It looks like good work, but I would be hesitent about depending on a >> package which pulled in both mtl and tranformers. >> >> Maybe that's just superstition - I haven't tried it. >> >> Antoine >> >> On Jun 28, 2010 5:51 PM, "Michael Snoyman" <mich...@snoyman.com> wrote: >> >> Hi all, >> I'll admit, the original idea for this package was something to place in >> ACME ;). However, it's goal is to solve a real problem: the lack of good >> instances on the Either type. As a brief summary, Either has no Applicative >> or Monad instances in the base library, has 2 reasonable definitions for >> Applicative, and there are conflicting orphan instances in the mtl and >> transformers packages. Also, the ErrorT transformer in those two packages >> introduces a superclass constraint many people would like to avoid. >> neither supplies three datatypes: AEither, MEither and MEitherT. AEither >> provides the Monoid version of the Applicative instance, MEither is the >> monadic version, and MEitherT is a monad transformer. The package provides >> instances for both the transformers and mtl libraries for MonadTrans, >> MonadIO and MonadCatchIO. >> The code is up on github[1], let me know what you think. >> Michael >> [1] http://github.com/snoyberg/neither >> _______________________________________________ >> Haskell-Cafe mailing list >> Haskell-Cafe@haskell.org >> http://www.haskell.org/mailman/listinfo/haskell-cafe >> > > > _______________________________________________ > Haskell-Cafe mailing list > Haskell-Cafe@haskell.org > http://www.haskell.org/mailman/listinfo/haskell-cafe > > -- Ivan Lazar Miljenovic ivan.miljeno...@gmail.com IvanMiljenovic.wordpress.com _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe