Safe Haskell	None
Language	Haskell2010

Control.Effect

Synopsis

class HFunctor sig => Carrier sig h | h -> sig
class HFunctor sig => Effect sig
data Fail (m :: * -> *) k
data Lift sig (m :: * -> *) k
data NonDet (m :: * -> *) k
data Random m k
class Member (sub :: (* -> *) -> * -> *) sup
data (f :+: g) (m :: * -> *) k
send :: (Member effect sig, Carrier sig m) => effect m (m a) -> m a
data Eff carrier a
interpret :: Carrier sig carrier => Eff carrier a -> carrier a
data StateC s m a
data State s (m :: * -> *) k
data ResumableWithC err m a
data ResumableC err m a
data Resumable err (m :: * -> *) k
data ResourceC m a
data Resource m k
data ReaderC r m a
data Reader r m k
data RandomC g m a
data LiftC m a
runM :: Monad m => Eff (LiftC m) a -> m a
data FreshC m a
data Fresh m k
data FailC m a
data ErrorC e m a
data Error exc m k
data CullC m a
data Cull m k
data OnceC f m a
data AltC f m a
data CutC m a
data Cut m k
data TraceByReturningC m a
data TraceByIgnoringC m a
data TraceByPrintingC m a
data Trace (m :: * -> *) k
data VoidC a
data Void (m :: * -> *) k
run :: Eff VoidC a -> a
data WriterC w m a
data Writer w m k

Documentation

class HFunctor sig => Carrier sig h | h -> sig Source #

The class of carriers (results) for algebras (effect handlers) over signatures (effects), whose actions are given by the ret and eff methods.

Minimal complete definition

ret, eff

Instances

Carrier Void VoidC Source #
Instance details Defined in Control.Effect.Void Methods ret :: a -> VoidC a Source # eff :: Void VoidC (VoidC a) -> VoidC a Source #
Carrier sig carrier => Carrier sig (Eff carrier) Source #
Instance details Defined in Control.Effect.Internal Methods ret :: a -> Eff carrier a Source # eff :: sig (Eff carrier) (Eff carrier a) -> Eff carrier a Source #
Monad m => Carrier (Lift m) (LiftC m) Source #
Instance details Defined in Control.Effect.Lift Methods ret :: a -> LiftC m a Source # eff :: Lift m (LiftC m) (LiftC m a) -> LiftC m a Source #
(Carrier sig m, Effect sig) => Carrier (Fail :+: sig) (FailC m) Source #
Instance details Defined in Control.Effect.Fail Methods ret :: a -> FailC m a Source # eff :: (Fail :+: sig) (FailC m) (FailC m a) -> FailC m a Source #
(Carrier sig m, MonadIO m) => Carrier (Resource :+: sig) (ResourceC m) Source #
Instance details Defined in Control.Effect.Resource Methods ret :: a -> ResourceC m a Source # eff :: (Resource :+: sig) (ResourceC m) (ResourceC m a) -> ResourceC m a Source #
(Carrier sig m, Effect sig, Monad m) => Carrier (Fresh :+: sig) (FreshC m) Source #
Instance details Defined in Control.Effect.Fresh Methods ret :: a -> FreshC m a Source # eff :: (Fresh :+: sig) (FreshC m) (FreshC m a) -> FreshC m a Source #
(Alternative m, Carrier sig m, Effect sig, Monad m) => Carrier (Cull :+: (NonDet :+: sig)) (CullC m) Source #
Instance details Defined in Control.Effect.Cull Methods ret :: a -> CullC m a Source # eff :: (Cull :+: (NonDet :+: sig)) (CullC m) (CullC m a) -> CullC m a Source #
(Alternative m, Carrier sig m, Effect sig, Monad m) => Carrier (Cut :+: (NonDet :+: sig)) (CutC m) Source #
Instance details Defined in Control.Effect.Cut Methods ret :: a -> CutC m a Source # eff :: (Cut :+: (NonDet :+: sig)) (CutC m) (CutC m a) -> CutC m a Source #
(Carrier sig m, Effect sig) => Carrier (Trace :+: sig) (TraceByReturningC m) Source #
Instance details Defined in Control.Effect.Trace Methods ret :: a -> TraceByReturningC m a Source # eff :: (Trace :+: sig) (TraceByReturningC m) (TraceByReturningC m a) -> TraceByReturningC m a Source #
Carrier sig m => Carrier (Trace :+: sig) (TraceByIgnoringC m) Source #
Instance details Defined in Control.Effect.Trace Methods ret :: a -> TraceByIgnoringC m a Source # eff :: (Trace :+: sig) (TraceByIgnoringC m) (TraceByIgnoringC m a) -> TraceByIgnoringC m a Source #
(MonadIO m, Carrier sig m) => Carrier (Trace :+: sig) (TraceByPrintingC m) Source #
Instance details Defined in Control.Effect.Trace Methods ret :: a -> TraceByPrintingC m a Source # eff :: (Trace :+: sig) (TraceByPrintingC m) (TraceByPrintingC m a) -> TraceByPrintingC m a Source #
(Alternative f, Carrier sig m, Effect sig, Traversable f, Monad f, Monad m) => Carrier (NonDet :+: sig) (OnceC f m) Source #
Instance details Defined in Control.Effect.NonDet Methods ret :: a -> OnceC f m a Source # eff :: (NonDet :+: sig) (OnceC f m) (OnceC f m a) -> OnceC f m a Source #
(Alternative f, Monad f, Traversable f, Carrier sig m, Effect sig, Applicative m) => Carrier (NonDet :+: sig) (AltC f m) Source #
Instance details Defined in Control.Effect.NonDet Methods ret :: a -> AltC f m a Source # eff :: (NonDet :+: sig) (AltC f m) (AltC f m a) -> AltC f m a Source #
(Carrier sig m, Effect sig, RandomGen g, Monad m) => Carrier (Random :+: sig) (RandomC g m) Source #
Instance details Defined in Control.Effect.Random Methods ret :: a -> RandomC g m a Source # eff :: (Random :+: sig) (RandomC g m) (RandomC g m a) -> RandomC g m a Source #
(Carrier sig m, Effect sig) => Carrier (State s :+: sig) (StateC s m) Source #
Instance details Defined in Control.Effect.State Methods ret :: a -> StateC s m a Source # eff :: (State s :+: sig) (StateC s m) (StateC s m a) -> StateC s m a Source #
(Carrier sig m, Monad m) => Carrier (Resumable err :+: sig) (ResumableWithC err m) Source #
Instance details Defined in Control.Effect.Resumable Methods ret :: a -> ResumableWithC err m a Source # eff :: (Resumable err :+: sig) (ResumableWithC err m) (ResumableWithC err m a) -> ResumableWithC err m a Source #
(Carrier sig m, Effect sig) => Carrier (Resumable err :+: sig) (ResumableC err m) Source #
Instance details Defined in Control.Effect.Resumable Methods ret :: a -> ResumableC err m a Source # eff :: (Resumable err :+: sig) (ResumableC err m) (ResumableC err m a) -> ResumableC err m a Source #
(Carrier sig m, Monad m) => Carrier (Reader r :+: sig) (ReaderC r m) Source #
Instance details Defined in Control.Effect.Reader Methods ret :: a -> ReaderC r m a Source # eff :: (Reader r :+: sig) (ReaderC r m) (ReaderC r m a) -> ReaderC r m a Source #
(Carrier sig m, Effect sig, Monad m) => Carrier (Error e :+: sig) (ErrorC e m) Source #
Instance details Defined in Control.Effect.Error Methods ret :: a -> ErrorC e m a Source # eff :: (Error e :+: sig) (ErrorC e m) (ErrorC e m a) -> ErrorC e m a Source #
(Monoid w, Carrier sig m, Effect sig, Monad m) => Carrier (Writer w :+: sig) (WriterC w m) Source #
Instance details Defined in Control.Effect.Writer Methods ret :: a -> WriterC w m a Source # eff :: (Writer w :+: sig) (WriterC w m) (WriterC w m a) -> WriterC w m a Source #

class HFunctor sig => Effect sig Source #

The class of effect types, which must:

Be functorial in their last two arguments, and
Support threading effects in higher-order positions through using the carrier’s suspended state.

Minimal complete definition

handle

Instances

Effect Fail Source #
Instance details Defined in Control.Effect.Fail.Internal Methods handle :: Functor f => f () -> (forall x. f (m x) -> n (f x)) -> Fail m (m a) -> Fail n (n (f a)) Source #
Effect NonDet Source #
Instance details Defined in Control.Effect.NonDet.Internal Methods handle :: Functor f => f () -> (forall x. f (m x) -> n (f x)) -> NonDet m (m a) -> NonDet n (n (f a)) Source #
Effect Random Source #
Instance details Defined in Control.Effect.Random.Internal Methods handle :: Functor f => f () -> (forall x. f (m x) -> n (f x)) -> Random m (m a) -> Random n (n (f a)) Source #
Effect Resource Source #
Instance details Defined in Control.Effect.Resource Methods handle :: Functor f => f () -> (forall x. f (m x) -> n (f x)) -> Resource m (m a) -> Resource n (n (f a)) Source #
Effect Fresh Source #
Instance details Defined in Control.Effect.Fresh Methods handle :: Functor f => f () -> (forall x. f (m x) -> n (f x)) -> Fresh m (m a) -> Fresh n (n (f a)) Source #
Effect Cull Source #
Instance details Defined in Control.Effect.Cull Methods handle :: Functor f => f () -> (forall x. f (m x) -> n (f x)) -> Cull m (m a) -> Cull n (n (f a)) Source #
Effect Cut Source #
Instance details Defined in Control.Effect.Cut Methods handle :: Functor f => f () -> (forall x. f (m x) -> n (f x)) -> Cut m (m a) -> Cut n (n (f a)) Source #
Effect Trace Source #
Instance details Defined in Control.Effect.Trace Methods handle :: Functor f => f () -> (forall x. f (m x) -> n (f x)) -> Trace m (m a) -> Trace n (n (f a)) Source #
Effect Void Source #
Instance details Defined in Control.Effect.Void Methods handle :: Functor f => f () -> (forall x. f (m x) -> n (f x)) -> Void m (m a) -> Void n (n (f a)) Source #
Functor sig => Effect (Lift sig) Source #
Instance details Defined in Control.Effect.Lift.Internal Methods handle :: Functor f => f () -> (forall x. f (m x) -> n (f x)) -> Lift sig m (m a) -> Lift sig n (n (f a)) Source #
Effect (State s) Source #
Instance details Defined in Control.Effect.State Methods handle :: Functor f => f () -> (forall x. f (m x) -> n (f x)) -> State s m (m a) -> State s n (n (f a)) Source #
Effect (Resumable err) Source #
Instance details Defined in Control.Effect.Resumable Methods handle :: Functor f => f () -> (forall x. f (m x) -> n (f x)) -> Resumable err m (m a) -> Resumable err n (n (f a)) Source #
Effect (Reader r) Source #
Instance details Defined in Control.Effect.Reader Methods handle :: Functor f => f () -> (forall x. f (m x) -> n (f x)) -> Reader r m (m a) -> Reader r n (n (f a)) Source #
Effect (Error exc) Source #
Instance details Defined in Control.Effect.Error Methods handle :: Functor f => f () -> (forall x. f (m x) -> n (f x)) -> Error exc m (m a) -> Error exc n (n (f a)) Source #
Effect (Writer w) Source #
Instance details Defined in Control.Effect.Writer Methods handle :: Functor f => f () -> (forall x. f (m x) -> n (f x)) -> Writer w m (m a) -> Writer w n (n (f a)) Source #
(Effect l, Effect r) => Effect (l :+: r) Source #
Instance details Defined in Control.Effect.Sum Methods handle :: Functor f => f () -> (forall x. f (m x) -> n (f x)) -> (l :+: r) m (m a) -> (l :+: r) n (n (f a)) Source #

data Fail (m :: * -> *) k Source #

Instances

Effect Fail Source #
Instance details Defined in Control.Effect.Fail.Internal Methods handle :: Functor f => f () -> (forall x. f (m x) -> n (f x)) -> Fail m (m a) -> Fail n (n (f a)) Source #
HFunctor Fail Source #
Instance details Defined in Control.Effect.Fail.Internal Methods fmap' :: (a -> b) -> Fail m a -> Fail m b Source # hmap :: (forall x. m x -> n x) -> Fail m a -> Fail n a Source #
Functor (Fail m) Source #
Instance details Defined in Control.Effect.Fail.Internal Methods fmap :: (a -> b) -> Fail m a -> Fail m b # (<$) :: a -> Fail m b -> Fail m a #
(Carrier sig m, Effect sig) => Carrier (Fail :+: sig) (FailC m) Source #
Instance details Defined in Control.Effect.Fail Methods ret :: a -> FailC m a Source # eff :: (Fail :+: sig) (FailC m) (FailC m a) -> FailC m a Source #

data Lift sig (m :: * -> *) k Source #

Instances

Functor sig => Effect (Lift sig) Source #
Instance details Defined in Control.Effect.Lift.Internal Methods handle :: Functor f => f () -> (forall x. f (m x) -> n (f x)) -> Lift sig m (m a) -> Lift sig n (n (f a)) Source #
Functor sig => HFunctor (Lift sig) Source #
Instance details Defined in Control.Effect.Lift.Internal Methods fmap' :: (a -> b) -> Lift sig m a -> Lift sig m b Source # hmap :: (forall x. m x -> n x) -> Lift sig m a -> Lift sig n a Source #
Monad m => Carrier (Lift m) (LiftC m) Source #
Instance details Defined in Control.Effect.Lift Methods ret :: a -> LiftC m a Source # eff :: Lift m (LiftC m) (LiftC m a) -> LiftC m a Source #
Functor sig => Functor (Lift sig m) Source #
Instance details Defined in Control.Effect.Lift.Internal Methods fmap :: (a -> b) -> Lift sig m a -> Lift sig m b # (<$) :: a -> Lift sig m b -> Lift sig m a #

data NonDet (m :: * -> *) k Source #

Instances

Effect NonDet Source #
Instance details Defined in Control.Effect.NonDet.Internal Methods handle :: Functor f => f () -> (forall x. f (m x) -> n (f x)) -> NonDet m (m a) -> NonDet n (n (f a)) Source #
HFunctor NonDet Source #
Instance details Defined in Control.Effect.NonDet.Internal Methods fmap' :: (a -> b) -> NonDet m a -> NonDet m b Source # hmap :: (forall x. m x -> n x) -> NonDet m a -> NonDet n a Source #
Functor (NonDet m) Source #
Instance details Defined in Control.Effect.NonDet.Internal Methods fmap :: (a -> b) -> NonDet m a -> NonDet m b # (<$) :: a -> NonDet m b -> NonDet m a #
(Alternative m, Carrier sig m, Effect sig, Monad m) => Carrier (Cull :+: (NonDet :+: sig)) (CullC m) Source #
Instance details Defined in Control.Effect.Cull Methods ret :: a -> CullC m a Source # eff :: (Cull :+: (NonDet :+: sig)) (CullC m) (CullC m a) -> CullC m a Source #
(Alternative m, Carrier sig m, Effect sig, Monad m) => Carrier (Cut :+: (NonDet :+: sig)) (CutC m) Source #
Instance details Defined in Control.Effect.Cut Methods ret :: a -> CutC m a Source # eff :: (Cut :+: (NonDet :+: sig)) (CutC m) (CutC m a) -> CutC m a Source #
(Alternative f, Carrier sig m, Effect sig, Traversable f, Monad f, Monad m) => Carrier (NonDet :+: sig) (OnceC f m) Source #
Instance details Defined in Control.Effect.NonDet Methods ret :: a -> OnceC f m a Source # eff :: (NonDet :+: sig) (OnceC f m) (OnceC f m a) -> OnceC f m a Source #
(Alternative f, Monad f, Traversable f, Carrier sig m, Effect sig, Applicative m) => Carrier (NonDet :+: sig) (AltC f m) Source #
Instance details Defined in Control.Effect.NonDet Methods ret :: a -> AltC f m a Source # eff :: (NonDet :+: sig) (AltC f m) (AltC f m a) -> AltC f m a Source #

data Random m k Source #

Instances

Effect Random Source #
Instance details Defined in Control.Effect.Random.Internal Methods handle :: Functor f => f () -> (forall x. f (m x) -> n (f x)) -> Random m (m a) -> Random n (n (f a)) Source #
HFunctor Random Source #
Instance details Defined in Control.Effect.Random.Internal Methods fmap' :: (a -> b) -> Random m a -> Random m b Source # hmap :: (forall x. m x -> n x) -> Random m a -> Random n a Source #
Functor (Random m) Source #
Instance details Defined in Control.Effect.Random.Internal Methods fmap :: (a -> b) -> Random m a -> Random m b # (<$) :: a -> Random m b -> Random m a #
(Carrier sig m, Effect sig, RandomGen g, Monad m) => Carrier (Random :+: sig) (RandomC g m) Source #
Instance details Defined in Control.Effect.Random Methods ret :: a -> RandomC g m a Source # eff :: (Random :+: sig) (RandomC g m) (RandomC g m a) -> RandomC g m a Source #

class Member (sub :: (* -> *) -> * -> *) sup Source #

Minimal complete definition

inj, prj

Instances

Member sub sub Source #
Instance details Defined in Control.Effect.Sum Methods inj :: sub m a -> sub m a Source # prj :: sub m a -> Maybe (sub m a) Source #
Member sub sup => Member sub (sub' :+: sup) Source #
Instance details Defined in Control.Effect.Sum Methods inj :: sub m a -> (sub' :+: sup) m a Source # prj :: (sub' :+: sup) m a -> Maybe (sub m a) Source #
Member sub (sub :+: sup) Source #
Instance details Defined in Control.Effect.Sum Methods inj :: sub m a -> (sub :+: sup) m a Source # prj :: (sub :+: sup) m a -> Maybe (sub m a) Source #

data (f :+: g) (m :: * -> *) k infixr 4 Source #

Instances

Member sub sup => Member sub (sub' :+: sup) Source #
Instance details Defined in Control.Effect.Sum Methods inj :: sub m a -> (sub' :+: sup) m a Source # prj :: (sub' :+: sup) m a -> Maybe (sub m a) Source #
Member sub (sub :+: sup) Source #
Instance details Defined in Control.Effect.Sum Methods inj :: sub m a -> (sub :+: sup) m a Source # prj :: (sub :+: sup) m a -> Maybe (sub m a) Source #
(Effect l, Effect r) => Effect (l :+: r) Source #
Instance details Defined in Control.Effect.Sum Methods handle :: Functor f => f () -> (forall x. f (m x) -> n (f x)) -> (l :+: r) m (m a) -> (l :+: r) n (n (f a)) Source #
(HFunctor l, HFunctor r) => HFunctor (l :+: r) Source #
Instance details Defined in Control.Effect.Sum Methods fmap' :: (a -> b) -> (l :+: r) m a -> (l :+: r) m b Source # hmap :: (forall x. m x -> n x) -> (l :+: r) m a -> (l :+: r) n a Source #
(Carrier sig m, Effect sig) => Carrier (Fail :+: sig) (FailC m) Source #
Instance details Defined in Control.Effect.Fail Methods ret :: a -> FailC m a Source # eff :: (Fail :+: sig) (FailC m) (FailC m a) -> FailC m a Source #
(Carrier sig m, MonadIO m) => Carrier (Resource :+: sig) (ResourceC m) Source #
Instance details Defined in Control.Effect.Resource Methods ret :: a -> ResourceC m a Source # eff :: (Resource :+: sig) (ResourceC m) (ResourceC m a) -> ResourceC m a Source #
(Carrier sig m, Effect sig, Monad m) => Carrier (Fresh :+: sig) (FreshC m) Source #
Instance details Defined in Control.Effect.Fresh Methods ret :: a -> FreshC m a Source # eff :: (Fresh :+: sig) (FreshC m) (FreshC m a) -> FreshC m a Source #
(Alternative m, Carrier sig m, Effect sig, Monad m) => Carrier (Cull :+: (NonDet :+: sig)) (CullC m) Source #
Instance details Defined in Control.Effect.Cull Methods ret :: a -> CullC m a Source # eff :: (Cull :+: (NonDet :+: sig)) (CullC m) (CullC m a) -> CullC m a Source #
(Alternative m, Carrier sig m, Effect sig, Monad m) => Carrier (Cut :+: (NonDet :+: sig)) (CutC m) Source #
Instance details Defined in Control.Effect.Cut Methods ret :: a -> CutC m a Source # eff :: (Cut :+: (NonDet :+: sig)) (CutC m) (CutC m a) -> CutC m a Source #
(Carrier sig m, Effect sig) => Carrier (Trace :+: sig) (TraceByReturningC m) Source #
Instance details Defined in Control.Effect.Trace Methods ret :: a -> TraceByReturningC m a Source # eff :: (Trace :+: sig) (TraceByReturningC m) (TraceByReturningC m a) -> TraceByReturningC m a Source #
Carrier sig m => Carrier (Trace :+: sig) (TraceByIgnoringC m) Source #
Instance details Defined in Control.Effect.Trace Methods ret :: a -> TraceByIgnoringC m a Source # eff :: (Trace :+: sig) (TraceByIgnoringC m) (TraceByIgnoringC m a) -> TraceByIgnoringC m a Source #
(MonadIO m, Carrier sig m) => Carrier (Trace :+: sig) (TraceByPrintingC m) Source #
Instance details Defined in Control.Effect.Trace Methods ret :: a -> TraceByPrintingC m a Source # eff :: (Trace :+: sig) (TraceByPrintingC m) (TraceByPrintingC m a) -> TraceByPrintingC m a Source #
(Alternative f, Carrier sig m, Effect sig, Traversable f, Monad f, Monad m) => Carrier (NonDet :+: sig) (OnceC f m) Source #
Instance details Defined in Control.Effect.NonDet Methods ret :: a -> OnceC f m a Source # eff :: (NonDet :+: sig) (OnceC f m) (OnceC f m a) -> OnceC f m a Source #
(Alternative f, Monad f, Traversable f, Carrier sig m, Effect sig, Applicative m) => Carrier (NonDet :+: sig) (AltC f m) Source #
Instance details Defined in Control.Effect.NonDet Methods ret :: a -> AltC f m a Source # eff :: (NonDet :+: sig) (AltC f m) (AltC f m a) -> AltC f m a Source #
(Carrier sig m, Effect sig, RandomGen g, Monad m) => Carrier (Random :+: sig) (RandomC g m) Source #
Instance details Defined in Control.Effect.Random Methods ret :: a -> RandomC g m a Source # eff :: (Random :+: sig) (RandomC g m) (RandomC g m a) -> RandomC g m a Source #
(Carrier sig m, Effect sig) => Carrier (State s :+: sig) (StateC s m) Source #
Instance details Defined in Control.Effect.State Methods ret :: a -> StateC s m a Source # eff :: (State s :+: sig) (StateC s m) (StateC s m a) -> StateC s m a Source #
(Carrier sig m, Monad m) => Carrier (Resumable err :+: sig) (ResumableWithC err m) Source #
Instance details Defined in Control.Effect.Resumable Methods ret :: a -> ResumableWithC err m a Source # eff :: (Resumable err :+: sig) (ResumableWithC err m) (ResumableWithC err m a) -> ResumableWithC err m a Source #
(Carrier sig m, Effect sig) => Carrier (Resumable err :+: sig) (ResumableC err m) Source #
Instance details Defined in Control.Effect.Resumable Methods ret :: a -> ResumableC err m a Source # eff :: (Resumable err :+: sig) (ResumableC err m) (ResumableC err m a) -> ResumableC err m a Source #
(Carrier sig m, Monad m) => Carrier (Reader r :+: sig) (ReaderC r m) Source #
Instance details Defined in Control.Effect.Reader Methods ret :: a -> ReaderC r m a Source # eff :: (Reader r :+: sig) (ReaderC r m) (ReaderC r m a) -> ReaderC r m a Source #
(Carrier sig m, Effect sig, Monad m) => Carrier (Error e :+: sig) (ErrorC e m) Source #
Instance details Defined in Control.Effect.Error Methods ret :: a -> ErrorC e m a Source # eff :: (Error e :+: sig) (ErrorC e m) (ErrorC e m a) -> ErrorC e m a Source #
(Monoid w, Carrier sig m, Effect sig, Monad m) => Carrier (Writer w :+: sig) (WriterC w m) Source #
Instance details Defined in Control.Effect.Writer Methods ret :: a -> WriterC w m a Source # eff :: (Writer w :+: sig) (WriterC w m) (WriterC w m a) -> WriterC w m a Source #
(Functor (f m), Functor (g m)) => Functor ((f :+: g) m) Source #
Instance details Defined in Control.Effect.Sum Methods fmap :: (a -> b) -> (f :+: g) m a -> (f :+: g) m b # (<$) :: a -> (f :+: g) m b -> (f :+: g) m a #
(Eq (f m k), Eq (g m k)) => Eq ((f :+: g) m k) Source #
Instance details Defined in Control.Effect.Sum Methods (==) :: (f :+: g) m k -> (f :+: g) m k -> Bool # (/=) :: (f :+: g) m k -> (f :+: g) m k -> Bool #
(Ord (f m k), Ord (g m k)) => Ord ((f :+: g) m k) Source #
Instance details Defined in Control.Effect.Sum Methods compare :: (f :+: g) m k -> (f :+: g) m k -> Ordering # (<) :: (f :+: g) m k -> (f :+: g) m k -> Bool # (<=) :: (f :+: g) m k -> (f :+: g) m k -> Bool # (>) :: (f :+: g) m k -> (f :+: g) m k -> Bool # (>=) :: (f :+: g) m k -> (f :+: g) m k -> Bool # max :: (f :+: g) m k -> (f :+: g) m k -> (f :+: g) m k # min :: (f :+: g) m k -> (f :+: g) m k -> (f :+: g) m k #
(Show (f m k), Show (g m k)) => Show ((f :+: g) m k) Source #
Instance details Defined in Control.Effect.Sum Methods showsPrec :: Int -> (f :+: g) m k -> ShowS # show :: (f :+: g) m k -> String # showList :: [(f :+: g) m k] -> ShowS #

send :: (Member effect sig, Carrier sig m) => effect m (m a) -> m a Source #

Construct a request for an effect to be interpreted by some handler later on.

data Eff carrier a Source #

Instances

Carrier sig carrier => Carrier sig (Eff carrier) Source #
Instance details Defined in Control.Effect.Internal Methods ret :: a -> Eff carrier a Source # eff :: sig (Eff carrier) (Eff carrier a) -> Eff carrier a Source #
Monad (Eff carrier) Source #
Instance details Defined in Control.Effect.Internal Methods (>>=) :: Eff carrier a -> (a -> Eff carrier b) -> Eff carrier b # (>>) :: Eff carrier a -> Eff carrier b -> Eff carrier b # return :: a -> Eff carrier a # fail :: String -> Eff carrier a #
Functor (Eff carrier) Source #
Instance details Defined in Control.Effect.Internal Methods fmap :: (a -> b) -> Eff carrier a -> Eff carrier b # (<$) :: a -> Eff carrier b -> Eff carrier a #
(Member Fail sig, Carrier sig carrier) => MonadFail (Eff carrier) Source #
Instance details Defined in Control.Effect.Internal Methods fail :: String -> Eff carrier a #
Applicative (Eff carrier) Source #
Instance details Defined in Control.Effect.Internal Methods pure :: a -> Eff carrier a # (<>) :: Eff carrier (a -> b) -> Eff carrier a -> Eff carrier b # liftA2 :: (a -> b -> c) -> Eff carrier a -> Eff carrier b -> Eff carrier c # (>) :: Eff carrier a -> Eff carrier b -> Eff carrier b # (<*) :: Eff carrier a -> Eff carrier b -> Eff carrier a #
(Member (Lift IO) sig, Carrier sig carrier) => MonadIO (Eff carrier) Source #
Instance details Defined in Control.Effect.Internal Methods liftIO :: IO a -> Eff carrier a #
(Member NonDet sig, Carrier sig carrier) => Alternative (Eff carrier) Source #	Run computations nondeterministically. run (runNonDet empty) == [] run (runNonDet empty) == Nothing run (runNonDet (pure a <\|> pure b)) == [a, b] run (runNonDet (pure a <\|> pure b)) == Just a Associativity: run (runNonDet ((pure a <\|> pure b) <\|> pure c)) == (run (runNonDet (pure a <\|> (pure b <\|> pure c))) :: [Integer]) run (runNonDet ((pure a <\|> pure b) <\|> pure c)) == (run (runNonDet (pure a <\|> (pure b <\|> pure c))) :: Maybe Integer) Left-identity: run (runNonDet (empty <\|> pure b)) == (run (runNonDet (pure b)) :: [Integer]) run (runNonDet (empty <\|> pure b)) == (run (runNonDet (pure b)) :: Maybe Integer) Right-identity: run (runNonDet (pure a <\|> empty)) == (run (runNonDet (pure a)) :: [Integer]) run (runNonDet (pure a <\|> empty)) == (run (runNonDet (pure a)) :: Maybe Integer)
Instance details Defined in Control.Effect.Internal Methods empty :: Eff carrier a # (<\|>) :: Eff carrier a -> Eff carrier a -> Eff carrier a # some :: Eff carrier a -> Eff carrier [a] # many :: Eff carrier a -> Eff carrier [a] #
(Member NonDet sig, Carrier sig carrier) => MonadPlus (Eff carrier) Source #
Instance details Defined in Control.Effect.Internal Methods mzero :: Eff carrier a # mplus :: Eff carrier a -> Eff carrier a -> Eff carrier a #
(Member Random sig, Carrier sig carrier) => MonadInterleave (Eff carrier) Source #
Instance details Defined in Control.Effect.Internal Methods interleave :: Eff carrier a -> Eff carrier a #
(Member Random sig, Carrier sig carrier) => MonadRandom (Eff carrier) Source #
Instance details Defined in Control.Effect.Internal Methods getRandomR :: Random a => (a, a) -> Eff carrier a # getRandom :: Random a => Eff carrier a # getRandomRs :: Random a => (a, a) -> Eff carrier [a] # getRandoms :: Random a => Eff carrier [a] #

interpret :: Carrier sig carrier => Eff carrier a -> carrier a Source #

data StateC s m a Source #

Instances

(Carrier sig m, Effect sig) => Carrier (State s :+: sig) (StateC s m) Source #
Instance details Defined in Control.Effect.State Methods ret :: a -> StateC s m a Source # eff :: (State s :+: sig) (StateC s m) (StateC s m a) -> StateC s m a Source #

data State s (m :: * -> *) k Source #

Instances

Effect (State s) Source #
Instance details Defined in Control.Effect.State Methods handle :: Functor f => f () -> (forall x. f (m x) -> n (f x)) -> State s m (m a) -> State s n (n (f a)) Source #
HFunctor (State s) Source #
Instance details Defined in Control.Effect.State Methods fmap' :: (a -> b) -> State s m a -> State s m b Source # hmap :: (forall x. m x -> n x) -> State s m a -> State s n a Source #
Functor (State s m) Source #
Instance details Defined in Control.Effect.State Methods fmap :: (a -> b) -> State s m a -> State s m b # (<$) :: a -> State s m b -> State s m a #
(Carrier sig m, Effect sig) => Carrier (State s :+: sig) (StateC s m) Source #
Instance details Defined in Control.Effect.State Methods ret :: a -> StateC s m a Source # eff :: (State s :+: sig) (StateC s m) (StateC s m a) -> StateC s m a Source #

data ResumableWithC err m a Source #

Instances

(Carrier sig m, Monad m) => Carrier (Resumable err :+: sig) (ResumableWithC err m) Source #
Instance details Defined in Control.Effect.Resumable Methods ret :: a -> ResumableWithC err m a Source # eff :: (Resumable err :+: sig) (ResumableWithC err m) (ResumableWithC err m a) -> ResumableWithC err m a Source #

data ResumableC err m a Source #

Instances

(Carrier sig m, Effect sig) => Carrier (Resumable err :+: sig) (ResumableC err m) Source #
Instance details Defined in Control.Effect.Resumable Methods ret :: a -> ResumableC err m a Source # eff :: (Resumable err :+: sig) (ResumableC err m) (ResumableC err m a) -> ResumableC err m a Source #

data Resumable err (m :: * -> *) k Source #

Errors which can be resumed with values of some existentially-quantified type.

Instances

Effect (Resumable err) Source #
Instance details Defined in Control.Effect.Resumable Methods handle :: Functor f => f () -> (forall x. f (m x) -> n (f x)) -> Resumable err m (m a) -> Resumable err n (n (f a)) Source #
HFunctor (Resumable err) Source #
Instance details Defined in Control.Effect.Resumable Methods fmap' :: (a -> b) -> Resumable err m a -> Resumable err m b Source # hmap :: (forall x. m x -> n x) -> Resumable err m a -> Resumable err n a Source #
Functor (Resumable err m) Source #
Instance details Defined in Control.Effect.Resumable Methods fmap :: (a -> b) -> Resumable err m a -> Resumable err m b # (<$) :: a -> Resumable err m b -> Resumable err m a #
(Carrier sig m, Monad m) => Carrier (Resumable err :+: sig) (ResumableWithC err m) Source #
Instance details Defined in Control.Effect.Resumable Methods ret :: a -> ResumableWithC err m a Source # eff :: (Resumable err :+: sig) (ResumableWithC err m) (ResumableWithC err m a) -> ResumableWithC err m a Source #
(Carrier sig m, Effect sig) => Carrier (Resumable err :+: sig) (ResumableC err m) Source #
Instance details Defined in Control.Effect.Resumable Methods ret :: a -> ResumableC err m a Source # eff :: (Resumable err :+: sig) (ResumableC err m) (ResumableC err m a) -> ResumableC err m a Source #

data ResourceC m a Source #

Instances

(Carrier sig m, MonadIO m) => Carrier (Resource :+: sig) (ResourceC m) Source #
Instance details Defined in Control.Effect.Resource Methods ret :: a -> ResourceC m a Source # eff :: (Resource :+: sig) (ResourceC m) (ResourceC m a) -> ResourceC m a Source #

data Resource m k Source #

Instances

Effect Resource Source #
Instance details Defined in Control.Effect.Resource Methods handle :: Functor f => f () -> (forall x. f (m x) -> n (f x)) -> Resource m (m a) -> Resource n (n (f a)) Source #
HFunctor Resource Source #
Instance details Defined in Control.Effect.Resource Methods fmap' :: (a -> b) -> Resource m a -> Resource m b Source # hmap :: (forall x. m x -> n x) -> Resource m a -> Resource n a Source #
Functor (Resource m) Source #
Instance details Defined in Control.Effect.Resource Methods fmap :: (a -> b) -> Resource m a -> Resource m b # (<$) :: a -> Resource m b -> Resource m a #
(Carrier sig m, MonadIO m) => Carrier (Resource :+: sig) (ResourceC m) Source #
Instance details Defined in Control.Effect.Resource Methods ret :: a -> ResourceC m a Source # eff :: (Resource :+: sig) (ResourceC m) (ResourceC m a) -> ResourceC m a Source #

data ReaderC r m a Source #

Instances

(Carrier sig m, Monad m) => Carrier (Reader r :+: sig) (ReaderC r m) Source #
Instance details Defined in Control.Effect.Reader Methods ret :: a -> ReaderC r m a Source # eff :: (Reader r :+: sig) (ReaderC r m) (ReaderC r m a) -> ReaderC r m a Source #

data Reader r m k Source #

Instances

Effect (Reader r) Source #
Instance details Defined in Control.Effect.Reader Methods handle :: Functor f => f () -> (forall x. f (m x) -> n (f x)) -> Reader r m (m a) -> Reader r n (n (f a)) Source #
HFunctor (Reader r) Source #
Instance details Defined in Control.Effect.Reader Methods fmap' :: (a -> b) -> Reader r m a -> Reader r m b Source # hmap :: (forall x. m x -> n x) -> Reader r m a -> Reader r n a Source #
Functor (Reader r m) Source #
Instance details Defined in Control.Effect.Reader Methods fmap :: (a -> b) -> Reader r m a -> Reader r m b # (<$) :: a -> Reader r m b -> Reader r m a #
(Carrier sig m, Monad m) => Carrier (Reader r :+: sig) (ReaderC r m) Source #
Instance details Defined in Control.Effect.Reader Methods ret :: a -> ReaderC r m a Source # eff :: (Reader r :+: sig) (ReaderC r m) (ReaderC r m a) -> ReaderC r m a Source #

data RandomC g m a Source #

Instances

(Carrier sig m, Effect sig, RandomGen g, Monad m) => Carrier (Random :+: sig) (RandomC g m) Source #
Instance details Defined in Control.Effect.Random Methods ret :: a -> RandomC g m a Source # eff :: (Random :+: sig) (RandomC g m) (RandomC g m a) -> RandomC g m a Source #

data LiftC m a Source #

Instances

Monad m => Carrier (Lift m) (LiftC m) Source #
Instance details Defined in Control.Effect.Lift Methods ret :: a -> LiftC m a Source # eff :: Lift m (LiftC m) (LiftC m a) -> LiftC m a Source #

runM :: Monad m => Eff (LiftC m) a -> m a Source #

Extract a Lifted Monadic action from an effectful computation.

data FreshC m a Source #

Instances

(Carrier sig m, Effect sig, Monad m) => Carrier (Fresh :+: sig) (FreshC m) Source #
Instance details Defined in Control.Effect.Fresh Methods ret :: a -> FreshC m a Source # eff :: (Fresh :+: sig) (FreshC m) (FreshC m a) -> FreshC m a Source #

data Fresh m k Source #

Instances

Effect Fresh Source #
Instance details Defined in Control.Effect.Fresh Methods handle :: Functor f => f () -> (forall x. f (m x) -> n (f x)) -> Fresh m (m a) -> Fresh n (n (f a)) Source #
HFunctor Fresh Source #
Instance details Defined in Control.Effect.Fresh Methods fmap' :: (a -> b) -> Fresh m a -> Fresh m b Source # hmap :: (forall x. m x -> n x) -> Fresh m a -> Fresh n a Source #
Functor (Fresh m) Source #
Instance details Defined in Control.Effect.Fresh Methods fmap :: (a -> b) -> Fresh m a -> Fresh m b # (<$) :: a -> Fresh m b -> Fresh m a #
(Carrier sig m, Effect sig, Monad m) => Carrier (Fresh :+: sig) (FreshC m) Source #
Instance details Defined in Control.Effect.Fresh Methods ret :: a -> FreshC m a Source # eff :: (Fresh :+: sig) (FreshC m) (FreshC m a) -> FreshC m a Source #

data FailC m a Source #

Instances

(Carrier sig m, Effect sig) => Carrier (Fail :+: sig) (FailC m) Source #
Instance details Defined in Control.Effect.Fail Methods ret :: a -> FailC m a Source # eff :: (Fail :+: sig) (FailC m) (FailC m a) -> FailC m a Source #

data ErrorC e m a Source #

Instances

(Carrier sig m, Effect sig, Monad m) => Carrier (Error e :+: sig) (ErrorC e m) Source #
Instance details Defined in Control.Effect.Error Methods ret :: a -> ErrorC e m a Source # eff :: (Error e :+: sig) (ErrorC e m) (ErrorC e m a) -> ErrorC e m a Source #

data Error exc m k Source #

Instances

Effect (Error exc) Source #
Instance details Defined in Control.Effect.Error Methods handle :: Functor f => f () -> (forall x. f (m x) -> n (f x)) -> Error exc m (m a) -> Error exc n (n (f a)) Source #
HFunctor (Error exc) Source #
Instance details Defined in Control.Effect.Error Methods fmap' :: (a -> b) -> Error exc m a -> Error exc m b Source # hmap :: (forall x. m x -> n x) -> Error exc m a -> Error exc n a Source #
Functor (Error exc m) Source #
Instance details Defined in Control.Effect.Error Methods fmap :: (a -> b) -> Error exc m a -> Error exc m b # (<$) :: a -> Error exc m b -> Error exc m a #
(Carrier sig m, Effect sig, Monad m) => Carrier (Error e :+: sig) (ErrorC e m) Source #
Instance details Defined in Control.Effect.Error Methods ret :: a -> ErrorC e m a Source # eff :: (Error e :+: sig) (ErrorC e m) (ErrorC e m a) -> ErrorC e m a Source #

data CullC m a Source #

Instances

(Alternative m, Carrier sig m, Effect sig, Monad m) => Carrier (Cull :+: (NonDet :+: sig)) (CullC m) Source #
Instance details Defined in Control.Effect.Cull Methods ret :: a -> CullC m a Source # eff :: (Cull :+: (NonDet :+: sig)) (CullC m) (CullC m a) -> CullC m a Source #

data Cull m k Source #

Cull effects are used with NonDet to provide control over branching.

Instances

Effect Cull Source #
Instance details Defined in Control.Effect.Cull Methods handle :: Functor f => f () -> (forall x. f (m x) -> n (f x)) -> Cull m (m a) -> Cull n (n (f a)) Source #
HFunctor Cull Source #
Instance details Defined in Control.Effect.Cull Methods fmap' :: (a -> b) -> Cull m a -> Cull m b Source # hmap :: (forall x. m x -> n x) -> Cull m a -> Cull n a Source #
Functor (Cull m) Source #
Instance details Defined in Control.Effect.Cull Methods fmap :: (a -> b) -> Cull m a -> Cull m b # (<$) :: a -> Cull m b -> Cull m a #
(Alternative m, Carrier sig m, Effect sig, Monad m) => Carrier (Cull :+: (NonDet :+: sig)) (CullC m) Source #
Instance details Defined in Control.Effect.Cull Methods ret :: a -> CullC m a Source # eff :: (Cull :+: (NonDet :+: sig)) (CullC m) (CullC m a) -> CullC m a Source #

data OnceC f m a Source #

Instances

(Alternative f, Carrier sig m, Effect sig, Traversable f, Monad f, Monad m) => Carrier (NonDet :+: sig) (OnceC f m) Source #
Instance details Defined in Control.Effect.NonDet Methods ret :: a -> OnceC f m a Source # eff :: (NonDet :+: sig) (OnceC f m) (OnceC f m a) -> OnceC f m a Source #

data AltC f m a Source #

Instances

(Alternative f, Monad f, Traversable f, Carrier sig m, Effect sig, Applicative m) => Carrier (NonDet :+: sig) (AltC f m) Source #
Instance details Defined in Control.Effect.NonDet Methods ret :: a -> AltC f m a Source # eff :: (NonDet :+: sig) (AltC f m) (AltC f m a) -> AltC f m a Source #

data CutC m a Source #

Instances

(Alternative m, Carrier sig m, Effect sig, Monad m) => Carrier (Cut :+: (NonDet :+: sig)) (CutC m) Source #
Instance details Defined in Control.Effect.Cut Methods ret :: a -> CutC m a Source # eff :: (Cut :+: (NonDet :+: sig)) (CutC m) (CutC m a) -> CutC m a Source #

data Cut m k Source #

Cut effects are used with NonDet to provide control over backtracking.

Instances

Effect Cut Source #
Instance details Defined in Control.Effect.Cut Methods handle :: Functor f => f () -> (forall x. f (m x) -> n (f x)) -> Cut m (m a) -> Cut n (n (f a)) Source #
HFunctor Cut Source #
Instance details Defined in Control.Effect.Cut Methods fmap' :: (a -> b) -> Cut m a -> Cut m b Source # hmap :: (forall x. m x -> n x) -> Cut m a -> Cut n a Source #
Functor (Cut m) Source #
Instance details Defined in Control.Effect.Cut Methods fmap :: (a -> b) -> Cut m a -> Cut m b # (<$) :: a -> Cut m b -> Cut m a #
(Alternative m, Carrier sig m, Effect sig, Monad m) => Carrier (Cut :+: (NonDet :+: sig)) (CutC m) Source #
Instance details Defined in Control.Effect.Cut Methods ret :: a -> CutC m a Source # eff :: (Cut :+: (NonDet :+: sig)) (CutC m) (CutC m a) -> CutC m a Source #

data TraceByReturningC m a Source #

Instances

(Carrier sig m, Effect sig) => Carrier (Trace :+: sig) (TraceByReturningC m) Source #
Instance details Defined in Control.Effect.Trace Methods ret :: a -> TraceByReturningC m a Source # eff :: (Trace :+: sig) (TraceByReturningC m) (TraceByReturningC m a) -> TraceByReturningC m a Source #

data TraceByIgnoringC m a Source #

Instances

Carrier sig m => Carrier (Trace :+: sig) (TraceByIgnoringC m) Source #
Instance details Defined in Control.Effect.Trace Methods ret :: a -> TraceByIgnoringC m a Source # eff :: (Trace :+: sig) (TraceByIgnoringC m) (TraceByIgnoringC m a) -> TraceByIgnoringC m a Source #

data TraceByPrintingC m a Source #

Instances

(MonadIO m, Carrier sig m) => Carrier (Trace :+: sig) (TraceByPrintingC m) Source #
Instance details Defined in Control.Effect.Trace Methods ret :: a -> TraceByPrintingC m a Source # eff :: (Trace :+: sig) (TraceByPrintingC m) (TraceByPrintingC m a) -> TraceByPrintingC m a Source #

data Trace (m :: * -> *) k Source #

Instances

Effect Trace Source #
Instance details Defined in Control.Effect.Trace Methods handle :: Functor f => f () -> (forall x. f (m x) -> n (f x)) -> Trace m (m a) -> Trace n (n (f a)) Source #
HFunctor Trace Source #
Instance details Defined in Control.Effect.Trace Methods fmap' :: (a -> b) -> Trace m a -> Trace m b Source # hmap :: (forall x. m x -> n x) -> Trace m a -> Trace n a Source #
Functor (Trace m) Source #
Instance details Defined in Control.Effect.Trace Methods fmap :: (a -> b) -> Trace m a -> Trace m b # (<$) :: a -> Trace m b -> Trace m a #
(Carrier sig m, Effect sig) => Carrier (Trace :+: sig) (TraceByReturningC m) Source #
Instance details Defined in Control.Effect.Trace Methods ret :: a -> TraceByReturningC m a Source # eff :: (Trace :+: sig) (TraceByReturningC m) (TraceByReturningC m a) -> TraceByReturningC m a Source #
Carrier sig m => Carrier (Trace :+: sig) (TraceByIgnoringC m) Source #
Instance details Defined in Control.Effect.Trace Methods ret :: a -> TraceByIgnoringC m a Source # eff :: (Trace :+: sig) (TraceByIgnoringC m) (TraceByIgnoringC m a) -> TraceByIgnoringC m a Source #
(MonadIO m, Carrier sig m) => Carrier (Trace :+: sig) (TraceByPrintingC m) Source #
Instance details Defined in Control.Effect.Trace Methods ret :: a -> TraceByPrintingC m a Source # eff :: (Trace :+: sig) (TraceByPrintingC m) (TraceByPrintingC m a) -> TraceByPrintingC m a Source #

data VoidC a Source #

Instances

Monad VoidC Source #
Instance details Defined in Control.Effect.Void Methods (>>=) :: VoidC a -> (a -> VoidC b) -> VoidC b # (>>) :: VoidC a -> VoidC b -> VoidC b # return :: a -> VoidC a # fail :: String -> VoidC a #
Functor VoidC Source #
Instance details Defined in Control.Effect.Void Methods fmap :: (a -> b) -> VoidC a -> VoidC b # (<$) :: a -> VoidC b -> VoidC a #
Applicative VoidC Source #
Instance details Defined in Control.Effect.Void Methods pure :: a -> VoidC a # (<>) :: VoidC (a -> b) -> VoidC a -> VoidC b # liftA2 :: (a -> b -> c) -> VoidC a -> VoidC b -> VoidC c # (>) :: VoidC a -> VoidC b -> VoidC b # (<*) :: VoidC a -> VoidC b -> VoidC a #
Carrier Void VoidC Source #
Instance details Defined in Control.Effect.Void Methods ret :: a -> VoidC a Source # eff :: Void VoidC (VoidC a) -> VoidC a Source #

data Void (m :: * -> *) k Source #

Instances

Effect Void Source #
Instance details Defined in Control.Effect.Void Methods handle :: Functor f => f () -> (forall x. f (m x) -> n (f x)) -> Void m (m a) -> Void n (n (f a)) Source #
HFunctor Void Source #
Instance details Defined in Control.Effect.Void Methods fmap' :: (a -> b) -> Void m a -> Void m b Source # hmap :: (forall x. m x -> n x) -> Void m a -> Void n a Source #
Carrier Void VoidC Source #
Instance details Defined in Control.Effect.Void Methods ret :: a -> VoidC a Source # eff :: Void VoidC (VoidC a) -> VoidC a Source #
Functor (Void m) Source #
Instance details Defined in Control.Effect.Void Methods fmap :: (a -> b) -> Void m a -> Void m b # (<$) :: a -> Void m b -> Void m a #

run :: Eff VoidC a -> a Source #

Run an Eff exhausted of effects to produce its final result value.

data WriterC w m a Source #

A space-efficient carrier for Writer effects.

This is based on a post Gabriel Gonzalez made to the Haskell mailing list: https://mail.haskell.org/pipermail/libraries/2013-March/019528.html

Note that currently, the constant-space behaviour observed there only occurs when using WriterC and VoidC without Eff wrapping them. See the benchmark component for details.

Instances

(Monad m, Monoid w) => Monad (WriterC w m) Source #
Instance details Defined in Control.Effect.Writer Methods (>>=) :: WriterC w m a -> (a -> WriterC w m b) -> WriterC w m b # (>>) :: WriterC w m a -> WriterC w m b -> WriterC w m b # return :: a -> WriterC w m a # fail :: String -> WriterC w m a #
Functor m => Functor (WriterC w m) Source #
Instance details Defined in Control.Effect.Writer Methods fmap :: (a -> b) -> WriterC w m a -> WriterC w m b # (<$) :: a -> WriterC w m b -> WriterC w m a #
(Monad m, Monoid w) => Applicative (WriterC w m) Source #
Instance details Defined in Control.Effect.Writer Methods pure :: a -> WriterC w m a # (<>) :: WriterC w m (a -> b) -> WriterC w m a -> WriterC w m b # liftA2 :: (a -> b -> c) -> WriterC w m a -> WriterC w m b -> WriterC w m c # (>) :: WriterC w m a -> WriterC w m b -> WriterC w m b # (<*) :: WriterC w m a -> WriterC w m b -> WriterC w m a #
(Monoid w, Carrier sig m, Effect sig, Monad m) => Carrier (Writer w :+: sig) (WriterC w m) Source #
Instance details Defined in Control.Effect.Writer Methods ret :: a -> WriterC w m a Source # eff :: (Writer w :+: sig) (WriterC w m) (WriterC w m a) -> WriterC w m a Source #

data Writer w m k Source #

Instances

Effect (Writer w) Source #
Instance details Defined in Control.Effect.Writer Methods handle :: Functor f => f () -> (forall x. f (m x) -> n (f x)) -> Writer w m (m a) -> Writer w n (n (f a)) Source #
HFunctor (Writer w) Source #
Instance details Defined in Control.Effect.Writer Methods fmap' :: (a -> b) -> Writer w m a -> Writer w m b Source # hmap :: (forall x. m x -> n x) -> Writer w m a -> Writer w n a Source #
Functor (Writer w m) Source #
Instance details Defined in Control.Effect.Writer Methods fmap :: (a -> b) -> Writer w m a -> Writer w m b # (<$) :: a -> Writer w m b -> Writer w m a #
(Monoid w, Carrier sig m, Effect sig, Monad m) => Carrier (Writer w :+: sig) (WriterC w m) Source #
Instance details Defined in Control.Effect.Writer Methods ret :: a -> WriterC w m a Source # eff :: (Writer w :+: sig) (WriterC w m) (WriterC w m a) -> WriterC w m a Source #