XMonad

Documentation

module XMonad.Main

module XMonad.Core

module XMonad.Config

module XMonad.Layout

module XMonad.ManageHook

module XMonad.Operations

module Graphics.X11

module Graphics.X11.Xlib.Extras

(.|.) :: Bits a => a -> a -> a

Bitwise "or"

class Monad m => MonadState s m | m -> s where

Methods

get :: m s

Return the state from the internals of the monad.

put :: s -> m ()

Replace the state inside the monad.

Instances

MonadState XState X

MonadState s m => MonadState s (MaybeT m)

MonadState s m => MonadState s (ListT m)

MonadState s m => MonadState s (IdentityT m)

(Monoid w, MonadState s m) => MonadState s (WriterT w m)

(Monoid w, MonadState s m) => MonadState s (WriterT w m)

Monad m => MonadState s (StateT s m)

Monad m => MonadState s (StateT s m)

MonadState s m => MonadState s (ReaderT r m)

(Error e, MonadState s m) => MonadState s (ErrorT e m)

MonadState s m => MonadState s (ContT r m)

(Monad m, Monoid w) => MonadState s (RWST r w s m)

(Monad m, Monoid w) => MonadState s (RWST r w s m)

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

Gets specific component of the state, using a projection function supplied.

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

Monadic state transformer.

Maps an old state to a new state inside a state monad. The old state is thrown away.

      Main> :t modify ((+1) :: Int -> Int)
      modify (...) :: (MonadState Int a) => a ()

This says that modify (+1) acts over any Monad that is a member of the MonadState class, with an Int state.

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

See examples in Control.Monad.Reader. Note, the partially applied function type (->) r is a simple reader monad. See the instance declaration below.

Methods

ask :: m r

Retrieves the monad environment.

local

Arguments

:: (r -> r)

The function to modify the environment.

-> m a

Reader to run in the modified environment.

-> m a

Executes a computation in a modified environment.

Instances

MonadReader Window Query

MonadReader XConf X

MonadReader r m => MonadReader r (MaybeT m)

MonadReader r m => MonadReader r (ListT m)

MonadReader r m => MonadReader r (IdentityT m)

MonadReader r ((->) r)

(Monoid w, MonadReader r m) => MonadReader r (WriterT w m)

(Monoid w, MonadReader r m) => MonadReader r (WriterT w m)

MonadReader r m => MonadReader r (StateT s m)

MonadReader r m => MonadReader r (StateT s m)

Monad m => MonadReader r (ReaderT r m)

(Error e, MonadReader r m) => MonadReader r (ErrorT e m)

MonadReader r' m => MonadReader r' (ContT r m)

(Monad m, Monoid w) => MonadReader r (RWST r w s m)

(Monad m, Monoid w) => MonadReader r (RWST r w s m)

asks

Arguments

:: MonadReader r m

=> (r -> a)

The selector function to apply to the environment.

-> m a

Retrieves a function of the current environment.

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)

Methods

liftIO :: IO a -> m a

Lift a computation from the IO monad.

Instances

MonadIO IO

MonadIO Query

MonadIO X

MonadIO m => MonadIO (ListT m)

MonadIO m => MonadIO (MaybeT m)

MonadIO m => MonadIO (IdentityT m)

MonadIO m => MonadIO (ContT r m)

(Error e, MonadIO m) => MonadIO (ErrorT e m)

MonadIO m => MonadIO (ReaderT r m)

MonadIO m => MonadIO (StateT s m)

MonadIO m => MonadIO (StateT s 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)