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dcastro/LevNum.hs

Last active October 5, 2018 16:38
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Levity-polymorphic Num typeclass
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LevNum.hs
{-# LANGUAGE MagicHash #-}
{-# LANGUAGE TypeInType #-}
module LevNum where
import GHC.Prim
import GHC.Exts (TYPE)
class LevNum (a :: TYPE r) where
levAdd :: a -> a -> a
instance LevNum Int where levAdd = (+)
instance LevNum Int# where levAdd = (+#)
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