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Control.Monad.Trans.RWS.Strict | Portability | portable | Stability | experimental | Maintainer | libraries@haskell.org |
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Description |
Strict RWS monad.
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Synopsis |
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type RWS r w s = RWST r w s Identity | | rws :: (r -> s -> (a, s, w)) -> RWS r w s a | | runRWS :: RWS r w s a -> r -> s -> (a, s, w) | | evalRWS :: RWS r w s a -> r -> s -> (a, w) | | execRWS :: RWS r w s a -> r -> s -> (s, w) | | mapRWS :: ((a, s, w) -> (b, s, w')) -> RWS r w s a -> RWS r w' s b | | withRWS :: (r' -> s -> (r, s)) -> RWS r w s a -> RWS r' w s a | | newtype RWST r w s m a = RWST {} | | evalRWST :: Monad m => RWST r w s m a -> r -> s -> m (a, w) | | execRWST :: Monad m => RWST r w s m a -> r -> s -> m (s, w) | | mapRWST :: (m (a, s, w) -> n (b, s, w')) -> RWST r w s m a -> RWST r w' s n b | | withRWST :: (r' -> s -> (r, s)) -> RWST r w s m a -> RWST r' w s m a | | ask :: (Monoid w, Monad m) => RWST r w s m r | | local :: (Monoid w, Monad m) => (r -> r) -> RWST r w s m a -> RWST r w s m a | | asks :: (Monoid w, Monad m) => (r -> a) -> RWST r w s m a | | tell :: (Monoid w, Monad m) => w -> RWST r w s m () | | listen :: (Monoid w, Monad m) => RWST r w s m a -> RWST r w s m (a, w) | | pass :: (Monoid w, Monad m) => RWST r w s m (a, w -> w) -> RWST r w s m a | | listens :: (Monoid w, Monad m) => (w -> b) -> RWST r w s m a -> RWST r w s m (a, b) | | censor :: (Monoid w, Monad m) => (w -> w) -> RWST r w s m a -> RWST r w s m a | | get :: (Monoid w, Monad m) => RWST r w s m s | | put :: (Monoid w, Monad m) => s -> RWST r w s m () | | modify :: (Monoid w, Monad m) => (s -> s) -> RWST r w s m () | | gets :: (Monoid w, Monad m) => (s -> a) -> RWST r w s m a | | liftCallCC :: Monoid w => ((((a, s, w) -> m (b, s, w)) -> m (a, s, w)) -> m (a, s, w)) -> ((a -> RWST r w s m b) -> RWST r w s m a) -> RWST r w s m a | | liftCallCC' :: Monoid w => ((((a, s, w) -> m (b, s, w)) -> m (a, s, w)) -> m (a, s, w)) -> ((a -> RWST r w s m b) -> RWST r w s m a) -> RWST r w s m a | | liftCatch :: (m (a, s, w) -> (e -> m (a, s, w)) -> m (a, s, w)) -> RWST l w s m a -> (e -> RWST l w s m a) -> RWST l w s m a |
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The RWS monad
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rws :: (r -> s -> (a, s, w)) -> RWS r w s a | Source |
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runRWS :: RWS r w s a -> r -> s -> (a, s, w) | Source |
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evalRWS :: RWS r w s a -> r -> s -> (a, w) | Source |
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execRWS :: RWS r w s a -> r -> s -> (s, w) | Source |
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mapRWS :: ((a, s, w) -> (b, s, w')) -> RWS r w s a -> RWS r w' s b | Source |
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withRWS :: (r' -> s -> (r, s)) -> RWS r w s a -> RWS r' w s a | Source |
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The RWST monad transformer
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Constructors | RWST | | runRWST :: r -> s -> m (a, s, w) | |
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| Instances | |
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mapRWST :: (m (a, s, w) -> n (b, s, w')) -> RWST r w s m a -> RWST r w' s n b | Source |
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withRWST :: (r' -> s -> (r, s)) -> RWST r w s m a -> RWST r' w s m a | Source |
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Reader operations
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Writer operations
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State operations
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Monadic state transformer.
Maps an old state to a new state inside a state monad.
The old state is thrown away.
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Gets specific component of the state, using a projection function
supplied.
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Lifting other operations
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liftCallCC :: Monoid w => ((((a, s, w) -> m (b, s, w)) -> m (a, s, w)) -> m (a, s, w)) -> ((a -> RWST r w s m b) -> RWST r w s m a) -> RWST r w s m a | Source |
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Uniform lifting of a callCC operation to the new monad.
This version rolls back to the original state on entering the
continuation.
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liftCallCC' :: Monoid w => ((((a, s, w) -> m (b, s, w)) -> m (a, s, w)) -> m (a, s, w)) -> ((a -> RWST r w s m b) -> RWST r w s m a) -> RWST r w s m a | Source |
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In-situ lifting of a callCC operation to the new monad.
This version uses the current state on entering the continuation.
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liftCatch :: (m (a, s, w) -> (e -> m (a, s, w)) -> m (a, s, w)) -> RWST l w s m a -> (e -> RWST l w s m a) -> RWST l w s m a | Source |
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Lift a catchError operation to the new monad.
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Produced by Haddock version 2.4.2 |