transformers-0.5.5.0: Concrete functor and monad transformers

# transformers-0.5.5.0: Concrete functor and monad transformers

A portable library of functor and monad transformers, inspired by the paper

This package contains:

The package can be used on its own in portable Haskell code, in which case operations need to be manually lifted through transformer stacks (see Control.Monad.Trans.Class for some examples). Alternatively, it can be used with the non-portable monad classes in the mtl or monads-tf packages, which automatically lift operations introduced by monad transformers through other transformers.