roconnor@theorem.ca wrote:
I think that use of the mtl should be deprecated so that we move on to improved monad transformer libraries. Having the mtl in the Haskell Platform does the opposite by further entrenching its use, possibly to the point where we may not be able to get rid of it for years.
If I had to recommend a replace library, I would pick monadLib. However, there are other libraries, such as the mmtl and transformers and it's related packages that I haven't looked at, and may also make fine replacements for the mtl.
We've discussed replacing it with transformers+monads-fd+an mtl compatiblity layer on libraries@. Ross and I plan to propose doing this for the second release of the platform - it's not fair to disrupt the first release at this stage. transformers+monads-fd is quite a small evolution over mtl - it factors out the fundeps into a separate package, tightens up some of the class constraints, and makes State = StateT Identity etc rather than a separate type. Even this breaks a few packages, but doing anything more substantial would be quite disruptive. That's not to say that we shouldn't do it, though. I guess the libraries@ list will continue to be the place that such decisions get made, but I think it's a bit up in the air at the moment. Cheers, Ganesh =============================================================================== Please access the attached hyperlink for an important electronic communications disclaimer: http://www.credit-suisse.com/legal/en/disclaimer_email_ib.html ===============================================================================