| Copyright | (c) Andy Gill 2001, (c) Oregon Graduate Institute of Science and Technology, 2001 |
|---|---|
| License | BSD-style (see the file LICENSE) |
| Maintainer | libraries@haskell.org |
| Stability | experimental |
| Portability | portable |
| Safe Haskell | Safe-Inferred |
| Language | Haskell98 |
Control.Monad.List
Description
The List monad.
- newtype ListT m a :: (* -> *) -> * -> * = ListT {
- runListT :: m [a]
- mapListT :: (m [a] -> n [b]) -> ListT m a -> ListT n b
- module Control.Monad
- module Control.Monad.Trans
Documentation
newtype ListT m a :: (* -> *) -> * -> *
Parameterizable list monad, with an inner monad.
Note: this does not yield a monad unless the argument monad is commutative.
Instances
| MonadTrans ListT | |
| MonadState s m => MonadState s (ListT m) | |
| MonadReader r m => MonadReader r (ListT m) | |
| MonadError e m => MonadError e (ListT m) | |
| Applicative m => Alternative (ListT m) | |
| Monad m => Monad (ListT m) | |
| Functor m => Functor (ListT m) | |
| Monad m => MonadPlus (ListT m) | |
| Applicative m => Applicative (ListT m) | |
| Foldable f => Foldable (ListT f) | |
| Traversable f => Traversable (ListT f) | |
| MonadIO m => MonadIO (ListT m) | |
| MonadCont m => MonadCont (ListT m) |
module Control.Monad
module Control.Monad.Trans