[Haskell-cafe] Re: Transformers versus monadLib versus...

Ivan Miljenovic wrote:

On 8 July 2010 13:36, Ertugrul Soeylemez 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.

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. And I don't know what you mean by "pre-existing type aliases". Greets, Ertugrul -- nightmare = unsafePerformIO (getWrongWife >>= sex) http://ertes.de/