Safe Haskell	None
Language	Haskell2010

Control.Monad.Trans.RWS.Ref

Description

An implementation of RWST built on top of mutable references, providing a proper monad morphism.

An additional advantage of this transformer over the standard RWST transformers in the transformers package is that it does not have space leaks in the writer component. For more information, see https://mail.haskell.org/pipermail/libraries/2012-October/018599.html.

Please see the documentation at https://www.stackage.org/package/monad-unlift for more details on using this module.

Synopsis

Documentation

data RWSRefT refw refs r w s m a Source #

Since: 0.1.0

Instances

((~) * (MCState (refw w)) (PrimState b), (~) * (MCState (refs s)) (PrimState b), Monad m, (~) * w (RefElement (refw w)), (~) * s (RefElement (refs s)), MutableRef (refw w), MutableRef (refs s), PrimMonad b, MonadBase b m, Monoid w) => MonadRWS r w s (RWSRefT refw refs r w s m) Source #

MonadBase b m => MonadBase b (RWSRefT refw refs r w s m) Source #
Methods liftBase :: b α -> RWSRefT refw refs r w s m α #
MonadBaseControl b m => MonadBaseControl b (RWSRefT refw refs r w s m) Source #
Associated Types type StM (RWSRefT refw refs r w s m :: * -> ) a :: # Methods liftBaseWith :: (RunInBase (RWSRefT refw refs r w s m) b -> b a) -> RWSRefT refw refs r w s m a # restoreM :: StM (RWSRefT refw refs r w s m) a -> RWSRefT refw refs r w s m a #
Monad m => MonadReader r (RWSRefT refw refs r w s m) Source #
Methods ask :: RWSRefT refw refs r w s m r # local :: (r -> r) -> RWSRefT refw refs r w s m a -> RWSRefT refw refs r w s m a # reader :: (r -> a) -> RWSRefT refw refs r w s m a #
((~) * (MCState (refs s)) (PrimState b), Monad m, (~) * s (RefElement (refs s)), MutableRef (refs s), PrimMonad b, MonadBase b m) => MonadState s (RWSRefT refw refs r w s m) Source #
Methods get :: RWSRefT refw refs r w s m s # put :: s -> RWSRefT refw refs r w s m () # state :: (s -> (a, s)) -> RWSRefT refw refs r w s m a #
((~) * (MCState (refw w)) (PrimState b), Monad m, (~) * w (RefElement (refw w)), MutableRef (refw w), PrimMonad b, MonadBase b m, Monoid w) => MonadWriter w (RWSRefT refw refs r w s m) Source #
Methods writer :: (a, w) -> RWSRefT refw refs r w s m a # tell :: w -> RWSRefT refw refs r w s m () # listen :: RWSRefT refw refs r w s m a -> RWSRefT refw refs r w s m (a, w) # pass :: RWSRefT refw refs r w s m (a, w -> w) -> RWSRefT refw refs r w s m a #
MonadTrans (RWSRefT refw refs r w s) Source #
Methods lift :: Monad m => m a -> RWSRefT refw refs r w s m a #
MonadTransControl (RWSRefT refw refs r w s) Source #
Associated Types type StT (RWSRefT refw refs r w s :: (* -> ) -> -> ) a :: # Methods liftWith :: Monad m => (Run (RWSRefT refw refs r w s) -> m a) -> RWSRefT refw refs r w s m a # restoreT :: Monad m => m (StT (RWSRefT refw refs r w s) a) -> RWSRefT refw refs r w s m a #
Monad m => Monad (RWSRefT refw refs r w s m) Source #
Methods (>>=) :: RWSRefT refw refs r w s m a -> (a -> RWSRefT refw refs r w s m b) -> RWSRefT refw refs r w s m b # (>>) :: RWSRefT refw refs r w s m a -> RWSRefT refw refs r w s m b -> RWSRefT refw refs r w s m b # return :: a -> RWSRefT refw refs r w s m a # fail :: String -> RWSRefT refw refs r w s m a #
Functor m => Functor (RWSRefT refw refs r w s m) Source #
Methods fmap :: (a -> b) -> RWSRefT refw refs r w s m a -> RWSRefT refw refs r w s m b # (<$) :: a -> RWSRefT refw refs r w s m b -> RWSRefT refw refs r w s m a #
Applicative m => Applicative (RWSRefT refw refs r w s m) Source #
Methods pure :: a -> RWSRefT refw refs r w s m a # (<>) :: RWSRefT refw refs r w s m (a -> b) -> RWSRefT refw refs r w s m a -> RWSRefT refw refs r w s m b # (>) :: RWSRefT refw refs r w s m a -> RWSRefT refw refs r w s m b -> RWSRefT refw refs r w s m b # (<*) :: RWSRefT refw refs r w s m a -> RWSRefT refw refs r w s m b -> RWSRefT refw refs r w s m a #
MonadIO m => MonadIO (RWSRefT refw refs r w s m) Source #
Methods liftIO :: IO a -> RWSRefT refw refs r w s m a #
MonadThrow m => MonadThrow (RWSRefT refw refs r w s m) Source #
Methods throwM :: Exception e => e -> RWSRefT refw refs r w s m a #
MonadCatch m => MonadCatch (RWSRefT refw refs r w s m) Source #
Methods catch :: Exception e => RWSRefT refw refs r w s m a -> (e -> RWSRefT refw refs r w s m a) -> RWSRefT refw refs r w s m a #
MonadMask m => MonadMask (RWSRefT refw refs r w s m) Source #
Methods mask :: ((forall a. RWSRefT refw refs r w s m a -> RWSRefT refw refs r w s m a) -> RWSRefT refw refs r w s m b) -> RWSRefT refw refs r w s m b # uninterruptibleMask :: ((forall a. RWSRefT refw refs r w s m a -> RWSRefT refw refs r w s m a) -> RWSRefT refw refs r w s m b) -> RWSRefT refw refs r w s m b #
MonadResource m => MonadResource (RWSRefT refw refs r w s m) Source #
Methods liftResourceT :: ResourceT IO a -> RWSRefT refw refs r w s m a #
type StT (RWSRefT refw refs r w s) a Source #
type StT (RWSRefT refw refs r w s) a = a
type StM (RWSRefT refw refs r w s m) a Source #
type StM (RWSRefT refw refs r w s m) a = StM m a

runRWSRefT :: (Monad m, w ~ RefElement (refw w), s ~ RefElement (refs s), MCState (refw w) ~ PrimState b, MCState (refs s) ~ PrimState b, MonadBase b m, MutableRef (refw w), MutableRef (refs s), PrimMonad b, Monoid w) => RWSRefT refw refs r w s m a -> r -> s -> m (a, s, w) Source #

Since: 0.1.0

runRWSIORefT :: (Monad m, RealWorld ~ PrimState b, MonadBase b m, PrimMonad b, Monoid w) => RWSRefT IORef IORef r w s m a -> r -> s -> m (a, s, w) Source #

Since: 0.1.0

runRWSSTRefT :: (Monad m, ps ~ PrimState b, MonadBase b m, PrimMonad b, Monoid w) => RWSRefT (STRef ps) (STRef ps) r w s m a -> r -> s -> m (a, s, w) Source #

Since: 0.1.0

module Control.Monad.RWS.Class