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Type classes #26

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Type classes #26

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29 changes: 29 additions & 0 deletions typeclasses.hs
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Original file line number Diff line number Diff line change
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class Playable a where
healingPower :: a -> Double

data Warrior =
Warrior
{ warriorName :: String
}

instance Playable Warrior where
healingPower _warrior = 1

data Mage =
Mage
{ mageName :: String
, wizardingPower :: Double
}

instance Playable Mage where
healingPower mage = wizardingPower mage * 0.5

chris = Warrior { warriorName = "Chris" }
julie = Mage { mageName = "Julie", wizardingPower = 9000 }

main = do
putStr "Julie's Healing Power: "
print $ healingPower julie

putStr "Chris' Healing Power: "
print $ healingPower chris