Control.Monad.Trans.RWS.Ref

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.

Documentation

data RWSRefT refw refs r w s m a

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)

((~) * (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)

Monad m => MonadReader r (RWSRefT refw refs r w s m)

MonadBase b m => MonadBase b (RWSRefT refw refs r w s m)

MonadBaseControl b m => MonadBaseControl b (RWSRefT refw refs r w s m)

((~) * (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)

MonadTrans (RWSRefT refw refs r w s)

MonadTransControl (RWSRefT refw refs r w s)

Monad m => Monad (RWSRefT refw refs r w s m)

Functor m => Functor (RWSRefT refw refs r w s m)

Applicative m => Applicative (RWSRefT refw refs r w s m)

MonadThrow m => MonadThrow (RWSRefT refw refs r w s m)

MonadCatch m => MonadCatch (RWSRefT refw refs r w s m)

MonadMask m => MonadMask (RWSRefT refw refs r w s m)

MonadIO m => MonadIO (RWSRefT refw refs r w s m)

MonadResource m => MonadResource (RWSRefT refw refs r w s m)

type StT (RWSRefT refw refs r w s) a = a

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)

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)

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)

Since 0.1.0

module Control.Monad.RWS.Class