module Data.Accessor.Monad.MTL.State where
import qualified Data.Accessor.Basic as Accessor
import qualified Control.Monad.State as State
import qualified Control.Monad.Trans as Trans
import Control.Monad.State (MonadState, State, runState, StateT(runStateT), )
import Control.Monad.Trans (MonadTrans, )
set :: MonadState r m => Accessor.T r a -> a -> m ()
set :: forall r (m :: * -> *) a. MonadState r m => T r a -> a -> m ()
set T r a
f a
x = forall s (m :: * -> *). MonadState s m => (s -> s) -> m ()
State.modify (forall r a. T r a -> a -> r -> r
Accessor.set T r a
f a
x)
get :: MonadState r m => Accessor.T r a -> m a
get :: forall r (m :: * -> *) a. MonadState r m => T r a -> m a
get T r a
f = forall s (m :: * -> *) a. MonadState s m => (s -> a) -> m a
State.gets (forall r a. T r a -> r -> a
Accessor.get T r a
f)
modify :: MonadState r m => Accessor.T r a -> (a -> a) -> m ()
modify :: forall r (m :: * -> *) a.
MonadState r m =>
T r a -> (a -> a) -> m ()
modify T r a
f a -> a
g = forall s (m :: * -> *). MonadState s m => (s -> s) -> m ()
State.modify (forall r a. T r a -> (a -> a) -> r -> r
Accessor.modify T r a
f a -> a
g)
getAndModify :: MonadState r m => Accessor.T r a -> (a -> a) -> m a
getAndModify :: forall r (m :: * -> *) a.
MonadState r m =>
T r a -> (a -> a) -> m a
getAndModify T r a
f a -> a
g =
do a
x <- forall r (m :: * -> *) a. MonadState r m => T r a -> m a
get T r a
f
forall r (m :: * -> *) a.
MonadState r m =>
T r a -> (a -> a) -> m ()
modify T r a
f a -> a
g
forall (m :: * -> *) a. Monad m => a -> m a
return a
x
modifyAndGet :: MonadState r m => Accessor.T r a -> (a -> a) -> m a
modifyAndGet :: forall r (m :: * -> *) a.
MonadState r m =>
T r a -> (a -> a) -> m a
modifyAndGet T r a
f a -> a
g =
do forall r (m :: * -> *) a.
MonadState r m =>
T r a -> (a -> a) -> m ()
modify T r a
f a -> a
g
forall r (m :: * -> *) a. MonadState r m => T r a -> m a
get T r a
f
infix 1 %=, %:
(%=) :: MonadState r m => Accessor.T r a -> a -> m ()
%= :: forall r (m :: * -> *) a. MonadState r m => T r a -> a -> m ()
(%=) = forall r (m :: * -> *) a. MonadState r m => T r a -> a -> m ()
set
(%:) :: MonadState r m => Accessor.T r a -> (a -> a) -> m ()
%: :: forall r (m :: * -> *) a.
MonadState r m =>
T r a -> (a -> a) -> m ()
(%:) = forall r (m :: * -> *) a.
MonadState r m =>
T r a -> (a -> a) -> m ()
modify
lift :: (MonadState r mr) =>
Accessor.T r s -> State s a -> mr a
lift :: forall r (mr :: * -> *) s a.
MonadState r mr =>
T r s -> State s a -> mr a
lift T r s
f State s a
m =
do s
s0 <- forall r (m :: * -> *) a. MonadState r m => T r a -> m a
get T r s
f
let (a
a,s
s1) = forall s a. State s a -> s -> (a, s)
runState State s a
m s
s0
forall r (m :: * -> *) a. MonadState r m => T r a -> a -> m ()
set T r s
f s
s1
forall (m :: * -> *) a. Monad m => a -> m a
return a
a
liftT :: (Monad m, MonadTrans t, MonadState r (t m)) =>
Accessor.T r s -> StateT s m a -> t m a
liftT :: forall (m :: * -> *) (t :: (* -> *) -> * -> *) r s a.
(Monad m, MonadTrans t, MonadState r (t m)) =>
T r s -> StateT s m a -> t m a
liftT T r s
f StateT s m a
m =
do s
s0 <- forall r (m :: * -> *) a. MonadState r m => T r a -> m a
get T r s
f
(a
a,s
s1) <- forall (t :: (* -> *) -> * -> *) (m :: * -> *) a.
(MonadTrans t, Monad m) =>
m a -> t m a
Trans.lift forall a b. (a -> b) -> a -> b
$ forall s (m :: * -> *) a. StateT s m a -> s -> m (a, s)
runStateT StateT s m a
m s
s0
forall r (m :: * -> *) a. MonadState r m => T r a -> a -> m ()
set T r s
f s
s1
forall (m :: * -> *) a. Monad m => a -> m a
return a
a