Plan 9 from Bell Labs’s /usr/web/sources/contrib/fernan/nhc98/src/prelude/Prelude/Ord_List.hs

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module Prelude(Ord(..)) where

instance Ord a => Ord [a] where
  compare []     []     = EQ
  compare []     (b:bs) = LT
  compare (a:as) []     = GT
  compare (a:as) (b:bs) =
    case compare a b of
    	LT -> LT
	EQ -> compare as bs
	GT -> GT
  

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