Control.Effect.Type.Internal.BaseControl

Documentation

newtype BaseControl b m a where

A helper primitive effect that allows for lowering computations to a base monad.

Helper primitive effects are effects that allow you to avoid interpreting one of your own effects as a primitive if the power needed from direct access to the underlying monad can instead be provided by the relevant helper primitive effect. The reason why you'd want to do this is that helper primitive effects already have ThreadsEff instances defined for them; so you don't have to define any for your own effect.

The helper primitive effects offered in this library are -- in order of ascending power -- Regional, Optional, BaseControl and Unlift.

BaseControl is typically used as a primitive effect. If you define a Carrier that relies on a novel non-trivial monad transformer t, then you need to make a a ThreadsEff t (BaseControl b) instance (if possible). threadBaseControlViaClass can help you with that.

The following threading constraints accept BaseControl:

• ReaderThreads
• StateThreads
• StateLazyThreads
• ErrorThreads
• WriterThreads
• WriterLazyThreads

Constructors

GainBaseControl :: (forall z. (MonadBaseControl b z, Coercible z m) => Proxy# z -> a) -> BaseControl b m a

Instances

Carrier m => PrimHandler BaseControlH (BaseControl m) m

Defined in Control.Effect.Internal.BaseControl

Methods

effPrimHandler :: EffPrimHandler (BaseControl m) m

ThreadsEff (ExceptT e) (BaseControl b)

Defined in Control.Effect.Type.Internal.BaseControl

Methods

threadEff :: Monad m => (forall x. BaseControl b m x -> m x) -> BaseControl b (ExceptT e m) a -> ExceptT e m a

Monoid w => ThreadsEff (WriterT w) (BaseControl b)

Defined in Control.Effect.Type.Internal.BaseControl

Methods

threadEff :: Monad m => (forall x. BaseControl b m x -> m x) -> BaseControl b (WriterT w m) a -> WriterT w m a

ThreadsEff (StateT s) (BaseControl b)

Defined in Control.Effect.Type.Internal.BaseControl

Methods

threadEff :: Monad m => (forall x. BaseControl b m x -> m x) -> BaseControl b (StateT s m) a -> StateT s m a

ThreadsEff (ReaderT i) (BaseControl b)

Defined in Control.Effect.Type.Internal.BaseControl

Methods

threadEff :: Monad m => (forall x. BaseControl b m x -> m x) -> BaseControl b (ReaderT i m) a -> ReaderT i m a

ThreadsEff (StateT s) (BaseControl b)

Defined in Control.Effect.Type.Internal.BaseControl

Methods

threadEff :: Monad m => (forall x. BaseControl b m x -> m x) -> BaseControl b (StateT s m) a -> StateT s m a

Monoid w => ThreadsEff (WriterT w) (BaseControl b)

Defined in Control.Effect.Type.Internal.BaseControl

Methods

threadEff :: Monad m => (forall x. BaseControl b m x -> m x) -> BaseControl b (WriterT w m) a -> WriterT w m a

Monoid w => ThreadsEff (WriterT w) (BaseControl b)

Defined in Control.Effect.Type.Internal.BaseControl

Methods

threadEff :: Monad m => (forall x. BaseControl b m x -> m x) -> BaseControl b (WriterT w m) a -> WriterT w m a

threadBaseControlViaClass :: forall b t m a. (MonadTrans t, Monad m, forall z. MonadBaseControl b z => MonadBaseControl b (t z), forall z. Coercible z m => Coercible (t z) (t m)) => (forall x. BaseControl b m x -> m x) -> BaseControl b (t m) a -> t m a

A valid definition of threadEff for a ThreadsEff t (BaseControl b) instance, given that t lifts MonadBaseControl b for any b.

threadOptionalViaBaseControl :: forall s t m a. (Functor s, Monad m, Monad (t m), ThreadsEff t (BaseControl m)) => (forall x. Optional s m x -> m x) -> Optional s (t m) a -> t m a

A valid definition of threadEff for a ThreadsEff t (Optional s) instance, given that t threads BaseControl b for any b.

newtype WriterCPS s m a

Constructors

WriterCPS

Fields

• unWriterCPS :: WriterT s m a

Instances

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

Defined in Control.Effect.Type.Internal.BaseControl

Methods

liftBase :: b α -> WriterCPS s m α

(Monoid s, MonadBaseControl b m) => MonadBaseControl b (WriterCPS s m)

Defined in Control.Effect.Type.Internal.BaseControl

Associated Types

type StM (WriterCPS s m) a

Methods

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

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

MonadTrans (WriterCPS s)

Defined in Control.Effect.Type.Internal.BaseControl

Methods

lift :: Monad m => m a -> WriterCPS s m a

Monad m => Monad (WriterCPS s m)

Defined in Control.Effect.Type.Internal.BaseControl

Methods

(>>=) :: WriterCPS s m a -> (a -> WriterCPS s m b) -> WriterCPS s m b

(>>) :: WriterCPS s m a -> WriterCPS s m b -> WriterCPS s m b

return :: a -> WriterCPS s m a

Functor m => Functor (WriterCPS s m)

Defined in Control.Effect.Type.Internal.BaseControl

Methods

fmap :: (a -> b) -> WriterCPS s m a -> WriterCPS s m b

(<$) :: a -> WriterCPS s m b -> WriterCPS s m a

Monad m => Applicative (WriterCPS s m)

Defined in Control.Effect.Type.Internal.BaseControl

Methods

pure :: a -> WriterCPS s m a

(<*>) :: WriterCPS s m (a -> b) -> WriterCPS s m a -> WriterCPS s m b

liftA2 :: (a -> b -> c) -> WriterCPS s m a -> WriterCPS s m b -> WriterCPS s m c

(*>) :: WriterCPS s m a -> WriterCPS s m b -> WriterCPS s m b

(<*) :: WriterCPS s m a -> WriterCPS s m b -> WriterCPS s m a

type StM (WriterCPS s m) a

Defined in Control.Effect.Type.Internal.BaseControl

type StM (WriterCPS s m) a = StM m (a, s)