mtl-1.1.0.2: Monad transformer librarySource codeContentsIndex
Control.Monad.Trans
Portabilityportable
Stabilityexperimental
Maintainerlibraries@haskell.org
Description

The MonadTrans class.

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

Documentation
class MonadTrans t whereSource
Methods
lift :: Monad m => m a -> t m aSource
show/hide Instances
class Monad m => MonadIO m whereSource
Methods
liftIO :: IO a -> m aSource
show/hide Instances
MonadIO IO
MonadIO m => MonadIO (ListT m)
(Error e, MonadIO m) => MonadIO (ErrorT e m)
MonadIO m => MonadIO (ReaderT r m)
MonadIO m => MonadIO (StateT s m)
MonadIO m => MonadIO (StateT s m)
(Monoid w, MonadIO m) => MonadIO (WriterT w m)
(Monoid w, MonadIO m) => MonadIO (WriterT w m)
MonadIO m => MonadIO (ContT r m)
(Monoid w, MonadIO m) => MonadIO (RWST r w s m)
(Monoid w, MonadIO m) => MonadIO (RWST r w s m)
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