Control.Monad.Trans.MultiState.Lazy

The multi-valued version of mtl's State / StateT

MultiStateT

newtype MultiStateT x m a

A State transformer monad patameterized by:

• x - The list of types constituting the state,
• m - The inner monad.

MultiStateT corresponds to mtl's StateT, but can contain a heterogenous list of types.

This heterogenous list is represented using Types.Data.List, i.e:

• '[] - The empty list,
• a ': b - A list where a is an arbitrary type and b is the rest list.

For example,

MultiStateT '[Int, Bool] :: (* -> *) -> (* -> *)

is a State wrapper containing the types [Int, Bool].

Constructors

MultiStateT

Fields

• runMultiStateTRaw :: StateT (HList x) m a

Instances

MonadBase b m => MonadBase b (MultiStateT s m)

Defined in Control.Monad.Trans.MultiState.Lazy

Methods

liftBase :: b α -> MultiStateT s m α

MonadBaseControl b m => MonadBaseControl b (MultiStateT s m)

Defined in Control.Monad.Trans.MultiState.Lazy

Associated Types

type StM (MultiStateT s m) a :: Type

Methods

liftBaseWith :: (RunInBase (MultiStateT s m) b -> b a) -> MultiStateT s m a

restoreM :: StM (MultiStateT s m) a -> MultiStateT s m a

MonadWriter w m => MonadWriter w (MultiStateT c m)

Defined in Control.Monad.Trans.MultiState.Lazy

Methods

writer :: (a, w) -> MultiStateT c m a

tell :: w -> MultiStateT c m ()

listen :: MultiStateT c m a -> MultiStateT c m (a, w)

pass :: MultiStateT c m (a, w -> w) -> MultiStateT c m a

MonadState s m => MonadState s (MultiStateT c m)

Defined in Control.Monad.Trans.MultiState.Lazy

Methods

get :: MultiStateT c m s

put :: s -> MultiStateT c m ()

state :: (s -> (a, s)) -> MultiStateT c m a

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

Defined in Control.Monad.Trans.MultiState.Lazy

Methods

mGet :: MultiStateT c m a

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

Defined in Control.Monad.Trans.MultiState.Lazy

Methods

mSet :: a -> MultiStateT c m ()

MonadTrans (MultiStateT x)

Defined in Control.Monad.Trans.MultiState.Lazy

Methods

lift :: Monad m => m a -> MultiStateT x m a

MonadTransControl (MultiStateT s)

Defined in Control.Monad.Trans.MultiState.Lazy

Associated Types

type StT (MultiStateT s) a :: Type

Methods

liftWith :: Monad m => (Run (MultiStateT s) -> m a) -> MultiStateT s m a

restoreT :: Monad m => m (StT (MultiStateT s) a) -> MultiStateT s m a

Monad m => Monad (MultiStateT x m)

Defined in Control.Monad.Trans.MultiState.Lazy

Methods

(>>=) :: MultiStateT x m a -> (a -> MultiStateT x m b) -> MultiStateT x m b

(>>) :: MultiStateT x m a -> MultiStateT x m b -> MultiStateT x m b

return :: a -> MultiStateT x m a

fail :: String -> MultiStateT x m a

Functor f => Functor (MultiStateT x f)

Defined in Control.Monad.Trans.MultiState.Lazy

Methods

fmap :: (a -> b) -> MultiStateT x f a -> MultiStateT x f b

(<$) :: a -> MultiStateT x f b -> MultiStateT x f a

MonadFix m => MonadFix (MultiStateT s m)

Defined in Control.Monad.Trans.MultiState.Lazy

Methods

mfix :: (a -> MultiStateT s m a) -> MultiStateT s m a

(Applicative m, Monad m) => Applicative (MultiStateT x m)

Defined in Control.Monad.Trans.MultiState.Lazy

Methods

pure :: a -> MultiStateT x m a

(<*>) :: MultiStateT x m (a -> b) -> MultiStateT x m a -> MultiStateT x m b

liftA2 :: (a -> b -> c) -> MultiStateT x m a -> MultiStateT x m b -> MultiStateT x m c

(*>) :: MultiStateT x m a -> MultiStateT x m b -> MultiStateT x m b

(<*) :: MultiStateT x m a -> MultiStateT x m b -> MultiStateT x m a

MonadIO m => MonadIO (MultiStateT c m)

Defined in Control.Monad.Trans.MultiState.Lazy

Methods

liftIO :: IO a -> MultiStateT c m a

(Functor m, Applicative m, MonadPlus m) => Alternative (MultiStateT s m)

Defined in Control.Monad.Trans.MultiState.Lazy

Methods

empty :: MultiStateT s m a

(<|>) :: MultiStateT s m a -> MultiStateT s m a -> MultiStateT s m a

some :: MultiStateT s m a -> MultiStateT s m [a]

many :: MultiStateT s m a -> MultiStateT s m [a]

MonadPlus m => MonadPlus (MultiStateT s m)

Defined in Control.Monad.Trans.MultiState.Lazy

Methods

mzero :: MultiStateT s m a

mplus :: MultiStateT s m a -> MultiStateT s m a -> MultiStateT s m a

type StT (MultiStateT s) a

Defined in Control.Monad.Trans.MultiState.Lazy

type StT (MultiStateT s) a = (a, HList s)

type StM (MultiStateT s m) a

Defined in Control.Monad.Trans.MultiState.Lazy

type StM (MultiStateT s m) a = ComposeSt (MultiStateT s) m a

type MultiStateTNull = MultiStateT '[]

A MultiState transformer carrying an empty state.

type MultiState x = MultiStateT x Identity

A state monad parameterized by the list of types x of the state to carry.

Similar to State s = StateT s Identity

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.

Methods

mGet

Arguments

:: m a

Access to a specific type in the environment.

Instances

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

Defined in Control.Monad.Trans.MultiGet.Class

Methods

mGet :: t m a

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

Defined in Control.Monad.Trans.MultiState.Strict

Methods

mGet :: MultiStateT c m a

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

Defined in Control.Monad.Trans.MultiState.Lazy

Methods

mGet :: MultiStateT c m a

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

Defined in Control.Monad.Trans.MultiReader.Strict

Methods

mGet :: MultiReaderT c m a

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

Defined in Control.Monad.Trans.MultiReader.Lazy

Methods

mGet :: MultiReaderT c m a

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

Defined in Control.Monad.Trans.MultiGST.Strict

Methods

mGet :: MultiGSTT cts m a

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

Defined in Control.Monad.Trans.MultiGST.Lazy

Methods

mGet :: MultiGSTT cts m a

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

Defined in Control.Monad.Trans.MultiRWS.Strict

Methods

mGet :: MultiRWST r w s m a

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

Defined in Control.Monad.Trans.MultiRWS.Lazy

Methods

mGet :: MultiRWST r w s m a

class MonadMultiGet a m => MonadMultiState a m where

Methods

mSet :: a -> m ()

Instances

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

Defined in Control.Monad.Trans.MultiState.Class

Methods

mSet :: a -> t m ()

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

Defined in Control.Monad.Trans.MultiState.Strict

Methods

mSet :: a -> MultiStateT c m ()

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

Defined in Control.Monad.Trans.MultiState.Lazy

Methods

mSet :: a -> MultiStateT c m ()

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

Defined in Control.Monad.Trans.MultiGST.Strict

Methods

mSet :: a -> MultiGSTT cts m ()

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

Defined in Control.Monad.Trans.MultiGST.Lazy

Methods

mSet :: a -> MultiGSTT cts m ()

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

Defined in Control.Monad.Trans.MultiRWS.Strict

Methods

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

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

Defined in Control.Monad.Trans.MultiRWS.Lazy

Methods

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

run-functions

runMultiStateT :: Functor m => HList s -> MultiStateT s m a -> m (a, HList s)

runMultiStateTAS :: Functor m => HList s -> MultiStateT s m a -> m (a, HList s)

runMultiStateTSA :: Monad m => HList s -> MultiStateT s m a -> m (HList s, a)

runMultiStateTA :: Monad m => HList s -> MultiStateT s m a -> m a

runMultiStateTS :: Monad m => HList s -> MultiStateT s m a -> m (HList s)

runMultiStateT_ :: Functor m => HList s -> MultiStateT s m a -> m ()

runMultiStateTNil :: Monad m => MultiStateT '[] m a -> m a

runMultiStateTNil_ :: Functor m => MultiStateT '[] m a -> m ()

with-functions (single state)

withMultiState :: Monad m => s -> MultiStateT (s ': ss) m a -> MultiStateT ss m (a, s)

withMultiStateAS :: Monad m => s -> MultiStateT (s ': ss) m a -> MultiStateT ss m (a, s)

withMultiStateSA :: Monad m => s -> MultiStateT (s ': ss) m a -> MultiStateT ss m (s, a)

withMultiStateA :: Monad m => s -> MultiStateT (s ': ss) m a -> MultiStateT ss m a

withMultiStateS :: Monad m => s -> MultiStateT (s ': ss) m a -> MultiStateT ss m s

withMultiState_ :: (Functor m, Monad m) => s -> MultiStateT (s ': ss) m a -> MultiStateT ss m ()

with-functions (multiple states)

withMultiStates :: Monad m => HList s1 -> MultiStateT (Append s1 s2) m a -> MultiStateT s2 m (a, HList s1)

withMultiStatesAS :: Monad m => HList s1 -> MultiStateT (Append s1 s2) m a -> MultiStateT s2 m (a, HList s1)

withMultiStatesSA :: Monad m => HList s1 -> MultiStateT (Append s1 s2) m a -> MultiStateT s2 m (HList s1, a)

withMultiStatesA :: Monad m => HList s1 -> MultiStateT (Append s1 s2) m a -> MultiStateT s2 m a

withMultiStatesS :: Monad m => HList s1 -> MultiStateT (Append s1 s2) m a -> MultiStateT s2 m (HList s1)

withMultiStates_ :: (Functor m, Monad m) => HList s1 -> MultiStateT (Append s1 s2) m a -> MultiStateT s2 m ()

without-function (single state)

withoutMultiState :: (Functor m, Monad m) => MultiStateT ss m a -> MultiStateT (s ': ss) m a

inflate-functions (run single state in multiple states)

inflateState :: (Monad m, ContainsType s ss) => StateT s m a -> MultiStateT ss m a

inflateReader :: (Monad m, ContainsType r ss) => ReaderT r m a -> MultiStateT ss m a

inflateWriter :: (Monad m, ContainsType w ss, Monoid w) => WriterT w m a -> MultiStateT ss m a

other functions

mapMultiStateT :: (m (a, HList w) -> m' (a', HList w)) -> MultiStateT w m a -> MultiStateT w m' a'

Map both the return value and the state of a computation using the given function.

mGetRaw :: Monad m => MultiStateT a m (HList a)

A raw extractor of the contained HList (i.e. the complete state).

mPutRaw :: Monad m => HList s -> MultiStateT s m ()