Name: Anonymous 2015-02-01 15:37
So where is it? When do I get cool web 2.0 features in my BBS?
There are quite a few libraries that try and provide more convenient ways of dealing with monad transformers (typically using those defined in transformers so as to avoid re-defining them all the time and to provide inter-compatibility): the old standard of mtl, the type-family variant found in monads-tf, the more ambitious layers package and Roman Cheplyaka’s monad-classes work.
However, I found that none of the libraries I could find really satisfied me.