| Copyright | (c) Andy Gill 2001, (c) Oregon Graduate Institute of Science and Technology, 2001 |
|---|---|
| License | BSD-style (see the file LICENSE) |
| Maintainer | R.Paterson@city.ac.uk |
| Stability | experimental |
| Portability | portable |
| Safe Haskell | Safe |
| Language | Haskell98 |
Control.Monad.Trans.List
Description
The ListT monad transformer, adding backtracking to a given monad, which must be commutative.
The ListT monad transformer
Parameterizable list monad, with an inner monad.
Note: this does not yield a monad unless the argument monad is commutative.
Instances
| MonadTrans ListT # | |
| Monad m => Monad (ListT m) # | |
| Functor m => Functor (ListT m) # | |
| Monad m => MonadFail (ListT m) # | |
| Applicative m => Applicative (ListT m) # | |
| Foldable f => Foldable (ListT f) # | |
| Traversable f => Traversable (ListT f) # | |
| Eq1 m => Eq1 (ListT m) # | |
| Ord1 m => Ord1 (ListT m) # | |
| Read1 m => Read1 (ListT m) # | |
| Show1 m => Show1 (ListT m) # | |
| MonadZip m => MonadZip (ListT m) # | |
| MonadIO m => MonadIO (ListT m) # | |
| Applicative m => Alternative (ListT m) # | |
| Monad m => MonadPlus (ListT m) # | |
| (Eq1 m, Eq a) => Eq (ListT m a) # | |
| (Ord1 m, Ord a) => Ord (ListT m a) # | |
| (Read1 m, Read a) => Read (ListT m a) # | |
| (Show1 m, Show a) => Show (ListT m a) # | |