testsuite/tests/typecheck/should_compile/tc053.hs


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module ShouldSucceed where

class Eq' a where
 deq :: a -> a -> Bool

instance Eq' Int where
 deq x y = True

instance (Eq' a) => Eq' [a] where
 deq (a:as) (b:bs) = if (deq a b) then (deq as bs) else False

f x = deq x [1]