On 8 July 2010 13:48, Ertugrul Soeylemez <e...@ertes.de> wrote: > Ivan Miljenovic <ivan.miljeno...@gmail.com> wrote: > >> On 8 July 2010 13:36, Ertugrul Soeylemez <e...@ertes.de> wrote: >> > To be honest, I don't know any strength of MTL compared to >> > transformers and monadLib. Actually even transformers is quite >> > primitive compared to monadLib. The only real advantage is that it >> > has flipped run functions and a built-in MaybeT. >> >> mtl's advantages: wide pre-existing user base, etc. > > As said, I don't think this is a valid argument. Windows has a much > larger user base than Linux. C++ has a much larger user base than > Haskell. We still use Haskell, and many of us use Linux.
My point was, was that if you need to pick a monad transformer library and you've never done any before, then some people are likely to choose mtl because it's currently the most-used library, it comes with the platform and if they need to interact with another package that uses a monad transformer library then it's more likely to be using mtl than anything else. >> transformers (especially when used with monads-{fd,tf}) advantage over >> monadLib: pre-existing type aliases, documentation, easier to port old >> code that was using mtl. > > If you don't use monadLib-specific features, then most code will run in > monadLib as well as transformers without changes. The Haddock > documentation of monadLib is quite brief, but if you know how to use > monad transformers, you won't have any problems. I for one don't know how to use monad transformers (I mean, I've read the section in RWH and could figure it out, but off the top of my head I can't recall how to do all the lifting stuff, etc.). > And I don't know what you mean by "pre-existing type aliases". http://hackage.haskell.org/packages/archive/transformers/0.2.1.0/doc/html/Control-Monad-Trans-State-Lazy.html#t%3AState -- 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