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Canonicalise Monad instance #23

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Nov 26, 2015
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5 changes: 3 additions & 2 deletions Data/DList.hs
Original file line number Diff line number Diff line change
Expand Up @@ -223,7 +223,8 @@ instance Functor DList where
{-# INLINE fmap #-}

instance Applicative DList where
pure = return
pure = singleton
{-# INLINE pure #-}
(<*>) = ap

instance Alternative DList where
Expand All @@ -240,7 +241,7 @@ instance Monad DList where
= foldr (append . k) empty m
{-# INLINE (>>=) #-}

return x = singleton x
return = pure
{-# INLINE return #-}

fail _ = empty
Expand Down