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Jan 22nd, 2013
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Haskell 0.16 KB | None | 0 0
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  1. {-# LANGUAGE ExistentialQuantification #-}
  2.  
  3. data Foo = forall a . Show a => Foo a
  4.  
  5. showSomething :: Foo -> IO ()
  6. showSomething (Foo a) = putStrLn (show a)
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