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add instance for Star #28

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Merged
thomashoneyman merged 3 commits into from
Dec 8, 2020
Merged

add instance for Star #28

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8198d14
add instance for Star
safareli Mar 7, 2019
c4e12d0
add Costar instance
safareli Mar 10, 2019
c4bb077
Merge branch 'master' into start
JordanMartinez Dec 5, 2020
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1 change: 1 addition & 0 deletions bower.json
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Expand Up @@ -23,6 +23,7 @@
"purescript-maybe": "master",
"purescript-newtype": "master",
"purescript-prelude": "master",
"purescript-profunctor": "master",
"purescript-refs": "master",
"purescript-transformers": "master"
},
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11 changes: 11 additions & 0 deletions src/Control/Parallel/Class.purs
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Expand Up @@ -14,6 +14,8 @@ import Data.Either (Either)
import Data.Functor.Compose (Compose(..))
import Data.Maybe (Maybe(..))
import Data.Newtype (class Newtype)
import Data.Profunctor.Costar (Costar(..))
import Data.Profunctor.Star (Star(..))
import Effect.Class (class MonadEffect, liftEffect)
import Effect.Ref as Ref

Expand All @@ -39,6 +41,15 @@ instance monadParMaybeT :: Parallel f m => Parallel (Compose f Maybe) (MaybeT m)
parallel (MaybeT ma) = Compose (parallel ma)
sequential (Compose fa) = MaybeT (sequential fa)

instance monadParStar :: Parallel f m => Parallel (Star f a) (Star m a) where
parallel (Star f) = (Star $ parallel <<< f)
sequential (Star f) = (Star $ sequential <<< f)

instance monadParCostar :: Parallel f m => Parallel (Costar f a) (Costar m a) where
parallel (Costar f) = (Costar $ sequential >>> f)
sequential (Costar f) = (Costar $ parallel >>> f)


-- | The `ParCont` type constructor provides an `Applicative` instance
-- | based on `ContT Unit m`, which waits for multiple continuations to be
-- | resumed simultaneously.
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