module ClassIn2  where

--Any class/instance name declared in this module can be renamed

--Rename instance name 'myreverse' to 'reversable'

class Reversable a where
  reversable :: a -> a
  reversable _ = undefined

instance Reversable [a] where
  reversable = reverse

data Foo = Boo | Moo

instance Eq Foo where
   Boo == Boo = True
   Moo == Moo = True
   _   == _   = False

main = reversable [1,2,3]