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| Control.Monad.RWS.Lazy | | Portability | non-portable (type families) | | Stability | experimental | | Maintainer | libraries@haskell.org |
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| Description |
Lazy RWS monad.
Inspired by the paper
/Functional Programming with Overloading and
Higher-Order Polymorphism/,
Mark P Jones (http://web.cecs.pdx.edu/~mpj/)
Advanced School of Functional Programming, 1995.
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| Synopsis |
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| type RWS r w s = RWST r w s Identity | | | 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 | | | module Control.Monad.RWS.Class | | | module Control.Monad | | | module Control.Monad.Fix | | | module Control.Monad.Trans | | | module Data.Monoid |
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| The RWS monad
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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 | | Monoid w => MonadTrans (RWST r w s) | | (Monoid w, Monad m) => Monad (RWST r w s m) | | Functor m => Functor (RWST r w s m) | | (Monoid w, MonadFix m) => MonadFix (RWST r w s m) | | (Monoid w, MonadPlus m) => MonadPlus (RWST r w s m) | | (Monoid w, Functor m, Monad m) => Applicative (RWST r w s m) | | (Monoid w, Functor m, MonadPlus m) => Alternative (RWST r w s m) | | (Monoid w, MonadIO m) => MonadIO (RWST r w s m) | | (Monoid w, Monad m) => MonadWriter (RWST r w s m) | | (Monad m, Monoid w) => MonadState (RWST r w s m) | | (Monoid w, Monad m) => MonadReader (RWST r w s m) | | (Monoid w, Monad m) => MonadRWS (RWST r w s m) | | (Monoid w, MonadError m) => MonadError (RWST r w s m) | | (Monoid w, MonadCont m) => MonadCont (RWST r w s m) |
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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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| Lazy Reader-writer-state monads
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| module Control.Monad.RWS.Class |
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| module Control.Monad |
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| module Control.Monad.Fix |
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| module Control.Monad.Trans |
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| module Data.Monoid |
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| Produced by Haddock version 2.6.0 |
