| 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
Deprecated: This transformer is invalid on most monads
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
Lifting other operations
liftCallCC :: CallCC m [a] [b] -> CallCC (ListT m) a b #
Lift a callCC operation to the new monad.