| Copyright | (c) Andy Gill 2001, (c) Oregon Graduate Institute of Science and Technology, 2001 |
|---|---|
| License | BSD-style (see the file LICENSE) |
| Maintainer | [email protected] |
| Stability | experimental |
| Portability | portable |
| Safe Haskell | Safe |
| Language | Haskell98 |
Class of monads based on IO.
class Monad m => MonadIO m where Source
Monads in which IO computations may be embedded. Any monad built by applying a sequence of monad transformers to the IO monad will be an instance of this class.
Instances should satisfy the following laws, which state that liftIO is a transformer of monads:
| MonadIO IO | |
| MonadIO m => MonadIO (IdentityT m) | |
| MonadIO m => MonadIO (ListT m) | |
| MonadIO m => MonadIO (MaybeT m) | |
| MonadIO m => MonadIO (ContT r m) | |
| MonadIO m => MonadIO (ReaderT r m) | |
| MonadIO m => MonadIO (StateT s m) | |
| MonadIO m => MonadIO (StateT s m) | |
| MonadIO m => MonadIO (ExceptT e m) | |
| (Error e, MonadIO m) => MonadIO (ErrorT e m) | |
| (Monoid w, MonadIO m) => MonadIO (WriterT w m) | |
| (Monoid w, MonadIO m) => MonadIO (WriterT w m) | |
| (Monoid w, MonadIO m) => MonadIO (RWST r w s m) | |
| (Monoid w, MonadIO m) => MonadIO (RWST r w s m) |
© The University of Glasgow and others
Licensed under a BSD-style license (see top of the page).
https://downloads.haskell.org/~ghc/7.10.3/docs/html/libraries/transformers-0.4.2.0/Control-Monad-IO-Class.html