| Safe Haskell | None |
|---|---|
| Language | Haskell2010 |
Control.Effect.Type.Internal.BaseControl
Synopsis
- newtype BaseControl b m a where
- GainBaseControl :: (forall z. (MonadBaseControl b z, Coercible z m) => Proxy# z -> a) -> BaseControl b 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
- 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
- newtype WriterCPS s m a = WriterCPS {
- unWriterCPS :: WriterT s m a
Documentation
newtype BaseControl b m a where Source #
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)threadBaseControlViaClass can help you with that.
The following threading constraints accept BaseControl:
Constructors
| GainBaseControl :: (forall z. (MonadBaseControl b z, Coercible z m) => Proxy# z -> a) -> BaseControl b m a |
Instances
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 Source #
A valid definition of threadEff for a ThreadsEff t (BaseControl b)t lifts MonadBaseControl bb.
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 Source #
A valid definition of threadEff for a ThreadsEff t (Optional s)t threads BaseControl bb.
newtype WriterCPS s m a Source #
Constructors
| WriterCPS | |
Fields
| |
Instances
| MonadBase b m => MonadBase b (WriterCPS s m) Source # | |
Defined in Control.Effect.Type.Internal.BaseControl | |
| (Monoid s, MonadBaseControl b m) => MonadBaseControl b (WriterCPS s m) Source # | |
| MonadTrans (WriterCPS s) Source # | |
Defined in Control.Effect.Type.Internal.BaseControl | |
| Monad m => Monad (WriterCPS s m) Source # | |
| Functor m => Functor (WriterCPS s m) Source # | |
| Monad m => Applicative (WriterCPS s m) Source # | |
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 Source # | |
Defined in Control.Effect.Type.Internal.BaseControl | |