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  1. class Foo a where
  2.    foo :: a -> a
  3.  
  4. bar :: Foo a => a -> a
  5. bar a = foo a
  6.  
  7. instance Foo Int where
  8.    foo x = x + 1
  9.  
  10. main = do
  11.    let x = 1 :: Int
  12.    print (bar x)
Success #stdin #stdout 0.02s 3580KB
comments (?)
stdin 
Standard input is empty
stdout 
2
https://ideone.com/5dQ1OQ
language:
Haskell (ghc 8.4.4)
created:
11 years ago
visibility:
public

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