Haskell Hierarchical Libraries (mtl package)ContentsIndex
Control.Monad.Trans
Portability portable
Stability experimental
Maintainer libraries@haskell.org
Description

The MonadTrans class.

Inspired by the paper Functional Programming with Overloading and Higher-Order Polymorphism, Mark P Jones (http://www.cse.ogi.edu/~mpj/) Advanced School of Functional Programming, 1995.

Synopsis
class MonadTrans t where
lift :: Monad m => m a -> t m a
class Monad m => MonadIO m where
liftIO :: IO a -> m a
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