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Producer Consumer execution https://cranky-goldstine-6a507b.netlify.com/#pixels=pqpqpqpq---%0Apcp%20p%7Cp---c%0Apcp-c%7C--c%20c%0Adc-dc--dcdc&context=p%3A%20p%20-%3E%20p%20x%0Aq%3A%20p%20-%3E%20p%0Ac%3A%20x%20c%20-%3E%20c%0Ad%3A%20c%20-%3E%20c%0A%7C%3A%20%5B1%5D
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"P1 produces food" | |
"C1 consumes food" | |
"P1 produces food" | |
"P1 produces food" | |
"C1 consumes food" | |
"P1 produces food" | |
"C1 consumes food" | |
"C1 consumes food" |
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{-# LANGUAGE DuplicateRecordFields #-} | |
import Control.Arrow | |
diagram | |
:: Arrow arr | |
=> arr (x, c) c | |
-> arr c c | |
-> arr p (p, x) | |
-> arr p p | |
-> arr (p, c) (p, c) | |
diagram c d p q = | |
(p *** d | |
>>> arr (\((p0_0, x1_0), c0_1) -> (p0_0, (x1_0, c0_1))) | |
>>> q *** c | |
>>> p *** returnA | |
>>> arr (\((p0_0, x1_0), a0_1) -> (p0_0, ((), (x1_0, a0_1)))) | |
>>> q *** returnA *** returnA *** d | |
>>> arr (\(p0_0, ((), (a0_2, c0_3))) -> (p0_0, (a0_2, c0_3))) | |
>>> p *** c | |
>>> arr (\((p0_0, x1_0), c0_1) -> (p0_0, (x1_0, c0_1))) | |
>>> q *** returnA *** returnA | |
>>> p *** returnA *** returnA | |
>>> arr (\((p0_0, x1_0), (a0_1, a0_2)) -> (p0_0, (x1_0, (a0_1, a0_2)))) | |
>>> q *** returnA *** returnA *** d | |
>>> returnA *** returnA *** c | |
>>> arr (\(a0_0, (a0_1, c0_2)) -> (a0_0, (a0_1, ((), c0_2)))) | |
>>> returnA *** returnA *** returnA *** d | |
>>> arr (\(a0_0, (a0_1, ((), c0_3))) -> (a0_0, (a0_1, c0_3))) | |
>>> returnA *** c) | |
data Producer = Producer { name :: String, goodName :: String } | |
data Consumer = Consumer { name :: String } | |
data Good = Good { name :: String } | |
p :: Kleisli IO Producer (Producer, Good) | |
p = Kleisli $ \p@(Producer name goodName) -> do | |
print $ name ++ " produces " ++ goodName | |
return (p, Good goodName) | |
q :: Kleisli IO Producer Producer | |
q = Kleisli return | |
c :: Kleisli IO (Good, Consumer) Consumer | |
c = Kleisli $ \(Good goodName, c@(Consumer name)) -> do | |
print $ name ++ " consumes " ++ goodName | |
return c | |
d :: Kleisli IO Consumer Consumer | |
d = Kleisli return | |
run :: IO (Producer, Consumer) | |
run = runKleisli (diagram c d p q) (Producer "P1" "food", Consumer "C1") |
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