Safe Haskell	Safe-Inferred
Language	Haskell2010

Foundation.Monad.State

Contents

MonadState
StateT

Synopsis

class Monad m => MonadState m where
- type State m
- withState :: (State m -> (a, State m)) -> m a
get :: MonadState m => m (State m)
put :: MonadState m => State m -> m ()
data StateT s m a
runStateT :: StateT s m a -> s -> m (a, s)

MonadState

class Monad m => MonadState m where Source #

Associated Types

type State m Source #

Methods

withState :: (State m -> (a, State m)) -> m a Source #

Instances

Instances details

MonadState Check Source #
Instance details Defined in Foundation.Check.Types Associated Types type State Check Source # Methods withState :: (State Check -> (a, State Check)) -> Check a Source #
(Functor m, Monad m) => MonadState (StateT s m) Source #
Instance details Defined in Foundation.Monad.State Associated Types type State (StateT s m) Source # Methods withState :: (State (StateT s m) -> (a, State (StateT s m))) -> StateT s m a Source #

get :: MonadState m => m (State m) Source #

put :: MonadState m => State m -> m () Source #

StateT

data StateT s m a Source #

State Transformer

Instances

Instances details

MonadTrans (StateT s) Source #
Instance details Defined in Foundation.Monad.State Methods lift :: Monad m => m a -> StateT s m a Source #
(Functor m, MonadFix m) => MonadFix (StateT s m) Source #
Instance details Defined in Foundation.Monad.State Methods mfix :: (a -> StateT s m a) -> StateT s m a #
(Functor m, MonadIO m) => MonadIO (StateT s m) Source #
Instance details Defined in Foundation.Monad.State Methods liftIO :: IO a -> StateT s m a #
(Applicative m, Monad m) => Applicative (StateT s m) Source #
Instance details Defined in Foundation.Monad.State Methods pure :: a -> StateT s m a # (<>) :: StateT s m (a -> b) -> StateT s m a -> StateT s m b # liftA2 :: (a -> b -> c) -> StateT s m a -> StateT s m b -> StateT s m c # (>) :: StateT s m a -> StateT s m b -> StateT s m b # (<*) :: StateT s m a -> StateT s m b -> StateT s m a #
Functor m => Functor (StateT s m) Source #
Instance details Defined in Foundation.Monad.State Methods fmap :: (a -> b) -> StateT s m a -> StateT s m b # (<$) :: a -> StateT s m b -> StateT s m a #
(Functor m, Monad m) => Monad (StateT s m) Source #
Instance details Defined in Foundation.Monad.State Methods (>>=) :: StateT s m a -> (a -> StateT s m b) -> StateT s m b # (>>) :: StateT s m a -> StateT s m b -> StateT s m b # return :: a -> StateT s m a #
(Functor m, MonadFailure m) => MonadFailure (StateT s m) Source #
Instance details Defined in Foundation.Monad.State Associated Types type Failure (StateT s m) Source # Methods mFail :: Failure (StateT s m) -> StateT s m () Source #
(Functor m, MonadCatch m) => MonadCatch (StateT s m) Source #
Instance details Defined in Foundation.Monad.State Methods catch :: Exception e => StateT s m a -> (e -> StateT s m a) -> StateT s m a Source #
(Functor m, MonadThrow m) => MonadThrow (StateT s m) Source #
Instance details Defined in Foundation.Monad.State Methods throw :: Exception e => e -> StateT s m a Source #
(Functor m, Monad m) => MonadState (StateT s m) Source #
Instance details Defined in Foundation.Monad.State Associated Types type State (StateT s m) Source # Methods withState :: (State (StateT s m) -> (a, State (StateT s m))) -> StateT s m a Source #
type Failure (StateT s m) Source #
Instance details Defined in Foundation.Monad.State type Failure (StateT s m) = Failure m
type State (StateT s m) Source #
Instance details Defined in Foundation.Monad.State type State (StateT s m) = s

runStateT :: StateT s m a -> s -> m (a, s) Source #