Control.Monad.Trans.MultiState.Class

The multi-valued version of mtl's MonadState

MonadMultiState class

class Monad m => MonadMultiGet a m where

In contrast to MonadMultiReader, MonadMultiGet is defined for State too, so it corresponds to read-access of any kind.

Note however that for MultiRWS, only the values from the state part can be accessed via MonadMultiGet, due to limitations of the design of MultiRWS and of the type system. This is issue is resolved in the MultiGST type.

Minimal complete definition

mGet

Methods

mGet :: m a

Instances

(MonadTrans t, Monad (t m), MonadMultiGet a m) => MonadMultiGet a (t m)

Methods

mGet :: t m a

(Monad m, ContainsType a c) => MonadMultiGet a (MultiReaderT c m)

Methods

mGet :: MultiReaderT c m a

(Monad m, ContainsType a c) => MonadMultiGet a (MultiReaderT c m)

Methods

mGet :: MultiReaderT c m a

(Monad m, ContainsType a c) => MonadMultiGet a (MultiStateT c m)

Methods

mGet :: MultiStateT c m a

(Monad m, ContainsType a c) => MonadMultiGet a (MultiStateT c m)

Methods

mGet :: MultiStateT c m a

(Monad m, HListMContains GettableFlag a cts) => MonadMultiGet a (MultiGSTT cts m)

Methods

mGet :: MultiGSTT cts m a

(Monad m, HListMContains GettableFlag a cts) => MonadMultiGet a (MultiGSTT cts m)

Methods

mGet :: MultiGSTT cts m a

(Monad m, ContainsType a s) => MonadMultiGet a (MultiRWST r w s m)

Methods

mGet :: MultiRWST r w s m a

(Monad m, ContainsType a s) => MonadMultiGet a (MultiRWST r w s m)

Methods

mGet :: MultiRWST r w s m a

class MonadMultiGet a m => MonadMultiState a m where

Minimal complete definition

mSet

Methods

mSet :: a -> m ()

Instances

(MonadTrans t, Monad (t m), MonadMultiState a m) => MonadMultiState a (t m)

Methods

mSet :: a -> t m ()

(Monad m, ContainsType a c) => MonadMultiState a (MultiStateT c m)

Methods

mSet :: a -> MultiStateT c m ()

(Monad m, ContainsType a c) => MonadMultiState a (MultiStateT c m)

Methods

mSet :: a -> MultiStateT c m ()

(Monad m, HListMContains SettableFlag a cts) => MonadMultiState a (MultiGSTT cts m)

Methods

mSet :: a -> MultiGSTT cts m ()

(Monad m, HListMContains SettableFlag a cts) => MonadMultiState a (MultiGSTT cts m)

Methods

mSet :: a -> MultiGSTT cts m ()

(Monad m, ContainsType a s) => MonadMultiState a (MultiRWST r w s m)

Methods

mSet :: a -> MultiRWST r w s m ()

(Monad m, ContainsType a s) => MonadMultiState a (MultiRWST r w s m)

Methods

mSet :: a -> MultiRWST r w s m ()