mtl-2.2.2: Monad classes, using functional dependencies
Monad classes using functional dependencies, with instances for various monad transformers, inspired by the paper Functional Programming with Overloading and Higher-Order Polymorphism , by Mark P Jones, in Advanced School of Functional Programming , 1995 ( http://web.cecs.pdx.edu/~mpj/pubs/springschool.html ).