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Control.Monad.List Portability non-portable ( requires mulit-parameter type classes ) Stability experimental Maintainer libraries@haskell.org

Description

The List monad.

data ListT m a

Constructors ListT runListT :: (m [a]) Instances (Monad m) => Functor (ListT m) (Monad m) => Monad (ListT m) (Monad m) => MonadPlus (ListT m) MonadTrans ListT (MonadIO m) => MonadIO (ListT m) (MonadReader s m) => MonadReader s (ListT m) (MonadState s m) => MonadState s (ListT m) (MonadCont m) => MonadCont (ListT m) (MonadError e m) => MonadError e (ListT m)

runListT :: ListT m a -> m [a]

mapListT :: (m [a] -> n [b]) -> ListT m a -> ListT n b

module Control.Monad

module Control.Monad.Trans

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