| Copyright | (c) Nils Schweinsberg 2011, (c) George Giorgidze 2011 (c) University Tuebingen 2011 |
|---|---|
| License | BSD-style (see the file libraries/base/LICENSE) |
| Maintainer | libraries@haskell.org |
| Stability | experimental |
| Portability | portable |
| Safe Haskell | Safe |
| Language | Haskell2010 |
Control.Monad.Zip
Description
Monadic zipping (used for monad comprehensions)
Documentation
class Monad m => MonadZip m where Source
MonadZip type class. Minimal definition: mzip or mzipWith
Instances should satisfy the laws:
- Naturality :
liftM (f *** g) (mzip ma mb) = mzip (liftM f ma) (liftM g mb)
- Information Preservation:
liftM (const ()) ma = liftM (const ()) mb ==> munzip (mzip ma mb) = (ma, mb)