-- Hoogle documentation, generated by Haddock
-- See Hoogle, http://www.haskell.org/hoogle/


-- | EitherT monad transformer
--   
--   Support for computations with informative failures.
@package EitherT
@version 0.1.0

module Control.Monad.Trans.Either
newtype EitherT l m a
EitherT :: m (Either l a) -> EitherT l m a
runEitherT :: EitherT l m a -> m (Either l a)
left :: Monad m => l -> EitherT l m a
instance (Applicative m, Monoid a) => Monoid (EitherT l m a)
instance MonadIO m => MonadIO (EitherT l m)
instance Applicative f => Applicative (EitherT l f)
instance Functor f => Functor (EitherT l f)
instance MonadTrans (EitherT l)
instance Monad m => Monad (EitherT l m)