39 lines
916 B
Plaintext
39 lines
916 B
Plaintext
|
module Main where
|
||
|
|
|
||
|
|
import Prelude
|
||
|
|
|
||
|
|
import Data.Tuple (Tuple(..))
|
||
|
|
import Effect (Effect)
|
||
|
|
import Effect.Class (class MonadEffect)
|
||
|
|
import Effect.Class.Console (logShow)
|
||
|
|
import Pipes (await, for, yield, (>->))
|
||
|
|
import Pipes.Core (Consumer_, Producer_, runEffect)
|
||
|
|
import Pipes.Prelude (take)
|
||
|
|
import Pipes.Prelude as Pipes
|
||
|
|
|
||
|
|
naturals :: forall m. Monad m => Producer_ Int m Unit
|
||
|
|
naturals = go 0
|
||
|
|
where
|
||
|
|
go n = do
|
||
|
|
yield n
|
||
|
|
go (n + 1)
|
||
|
|
|
||
|
|
logAll :: forall a m. MonadEffect m => Show a => Consumer_ a m Unit
|
||
|
|
logAll = do
|
||
|
|
showable <- await
|
||
|
|
logShow showable
|
||
|
|
logAll
|
||
|
|
|
||
|
|
nNaturals :: forall m. Monad m => Int -> Producer_ Int m Unit
|
||
|
|
nNaturals n = naturals >-> take n
|
||
|
|
|
||
|
|
merger :: forall m. Monad m => Producer_ (Tuple Int Int) m Unit
|
||
|
|
merger =
|
||
|
|
for (nNaturals 3) \a ->
|
||
|
|
for (nNaturals 3 >-> Pipes.map ((+) 4)) \b ->
|
||
|
|
yield $ Tuple a b
|
||
|
|
|
||
|
|
|
||
|
|
main :: Effect Unit
|
||
|
|
main = runEffect ((nNaturals 3 <> nNaturals 3) >-> logAll)
|