MonadState XState X #
Methods get :: X XState # put :: XState -> X () # state :: (XState -> (a, XState)) -> X a #
MonadState s m => MonadState s (MaybeT m)
Methods get :: MaybeT m s # put :: s -> MaybeT m () # state :: (s -> (a, s)) -> MaybeT m a #
MonadState s m => MonadState s (ListT m)
Methods get :: ListT m s # put :: s -> ListT m () # state :: (s -> (a, s)) -> ListT m a #
Monad m => MonadState s (StateT s m)
Methods get :: StateT s m s # put :: s -> StateT s m () # state :: (s -> (a, s)) -> StateT s m a #
(Monoid w, MonadState s m) => MonadState s (WriterT w m)
Methods get :: WriterT w m s # put :: s -> WriterT w m () # state :: (s -> (a, s)) -> WriterT w m a #
(Monoid w, MonadState s m) => MonadState s (WriterT w m)
Methods get :: WriterT w m s # put :: s -> WriterT w m () # state :: (s -> (a, s)) -> WriterT w m a #
Monad m => MonadState s (StateT s m)
Methods get :: StateT s m s # put :: s -> StateT s m () # state :: (s -> (a, s)) -> StateT s m a #
MonadState s m => MonadState s (IdentityT * m)
Methods get :: IdentityT * m s # put :: s -> IdentityT * m () # state :: (s -> (a, s)) -> IdentityT * m a #
MonadState s m => MonadState s (ExceptT e m)
Methods get :: ExceptT e m s # put :: s -> ExceptT e m () # state :: (s -> (a, s)) -> ExceptT e m a #
(Error e, MonadState s m) => MonadState s (ErrorT e m)
Methods get :: ErrorT e m s # put :: s -> ErrorT e m () # state :: (s -> (a, s)) -> ErrorT e m a #
MonadState s m => MonadState s (ReaderT * r m)
Methods get :: ReaderT * r m s # put :: s -> ReaderT * r m () # state :: (s -> (a, s)) -> ReaderT * r m a #
MonadState s m => MonadState s (ContT * r m)
Methods get :: ContT * r m s # put :: s -> ContT * r m () # state :: (s -> (a, s)) -> ContT * r m a #
(Monad m, Monoid w) => MonadState s (RWST r w s m)
Methods get :: RWST r w s m s # put :: s -> RWST r w s m () # state :: (s -> (a, s)) -> RWST r w s m a #
(Monad m, Monoid w) => MonadState s (RWST r w s m)
Methods get :: RWST r w s m s # put :: s -> RWST r w s m () # state :: (s -> (a, s)) -> RWST r w s m a #

gets :: MonadState s m => (s -> a) -> m a #

modify :: MonadState s m => (s -> s) -> m () #

class Monad m => MonadReader r m | m -> r where #

Minimal complete definition

(ask | reader), local

Methods

ask :: m r #

local :: (r -> r) -> m a -> m a #

reader :: (r -> a) -> m a #

Instances

MonadReader Window Query #
Methods ask :: Query Window # local :: (Window -> Window) -> Query a -> Query a # reader :: (Window -> a) -> Query a #
MonadReader XConf X #
Methods ask :: X XConf # local :: (XConf -> XConf) -> X a -> X a # reader :: (XConf -> a) -> X a #
MonadReader r m => MonadReader r (MaybeT m)
Methods ask :: MaybeT m r # local :: (r -> r) -> MaybeT m a -> MaybeT m a # reader :: (r -> a) -> MaybeT m a #
MonadReader r m => MonadReader r (ListT m)
Methods ask :: ListT m r # local :: (r -> r) -> ListT m a -> ListT m a # reader :: (r -> a) -> ListT m a #
MonadReader r ((->) r)
Methods ask :: r -> r # local :: (r -> r) -> (r -> a) -> r -> a # reader :: (r -> a) -> r -> a #
(Monoid w, MonadReader r m) => MonadReader r (WriterT w m)
Methods ask :: WriterT w m r # local :: (r -> r) -> WriterT w m a -> WriterT w m a # reader :: (r -> a) -> WriterT w m a #
(Monoid w, MonadReader r m) => MonadReader r (WriterT w m)
Methods ask :: WriterT w m r # local :: (r -> r) -> WriterT w m a -> WriterT w m a # reader :: (r -> a) -> WriterT w m a #
MonadReader r m => MonadReader r (StateT s m)
Methods ask :: StateT s m r # local :: (r -> r) -> StateT s m a -> StateT s m a # reader :: (r -> a) -> StateT s m a #
MonadReader r m => MonadReader r (StateT s m)
Methods ask :: StateT s m r # local :: (r -> r) -> StateT s m a -> StateT s m a # reader :: (r -> a) -> StateT s m a #
MonadReader r m => MonadReader r (IdentityT * m)
Methods ask :: IdentityT * m r # local :: (r -> r) -> IdentityT * m a -> IdentityT * m a # reader :: (r -> a) -> IdentityT * m a #
MonadReader r m => MonadReader r (ExceptT e m)
Methods ask :: ExceptT e m r # local :: (r -> r) -> ExceptT e m a -> ExceptT e m a # reader :: (r -> a) -> ExceptT e m a #
(Error e, MonadReader r m) => MonadReader r (ErrorT e m)
Methods ask :: ErrorT e m r # local :: (r -> r) -> ErrorT e m a -> ErrorT e m a # reader :: (r -> a) -> ErrorT e m a #
Monad m => MonadReader r (ReaderT * r m)
Methods ask :: ReaderT * r m r # local :: (r -> r) -> ReaderT * r m a -> ReaderT * r m a # reader :: (r -> a) -> ReaderT * r m a #
MonadReader r' m => MonadReader r' (ContT * r m)
Methods ask :: ContT * r m r' # local :: (r' -> r') -> ContT * r m a -> ContT * r m a # reader :: (r' -> a) -> ContT * r m a #
(Monad m, Monoid w) => MonadReader r (RWST r w s m)
Methods ask :: RWST r w s m r # local :: (r -> r) -> RWST r w s m a -> RWST r w s m a # reader :: (r -> a) -> RWST r w s m a #
(Monad m, Monoid w) => MonadReader r (RWST r w s m)
Methods ask :: RWST r w s m r # local :: (r -> r) -> RWST r w s m a -> RWST r w s m a # reader :: (r -> a) -> RWST r w s m a #

asks :: MonadReader r m => (r -> a) -> m a #

class Monad m => MonadIO m where #

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:

```
liftIO . return = return
```

liftIO (m >>= f) = liftIO m >>= (liftIO . f)

Minimal complete definition

liftIO

Methods

liftIO :: IO a -> m a #

Lift a computation from the IO monad.

Instances

MonadIO IO
Methods liftIO :: IO a -> IO a #
MonadIO Query #
Methods liftIO :: IO a -> Query a #
MonadIO X #
Methods liftIO :: IO a -> X a #
MonadIO m => MonadIO (StateT s m)
Methods liftIO :: IO a -> StateT s m a #
(Error e, MonadIO m) => MonadIO (ErrorT e m)
Methods liftIO :: IO a -> ErrorT e m a #
MonadIO m => MonadIO (ReaderT * r m)
Methods liftIO :: IO a -> ReaderT * r m a #