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  1. instance (Read a) => Read (IO a) where
  2.   readsPrec d s =
  3.     let f = readsPrec d in
  4. 	let xs = f s in
  5. 	map (\(x, s) -> (return x, s)) xs
  6.  
  7. main = do
  8.   read "123" :: IO Int
  9.   print "Hello"
  10.   x <- read "123" :: IO Int
  11.   print $ "World" ++ show x
Success #stdin #stdout 0.01s 5384KB
comments (?)
stdin
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Standard input is empty
stdout
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"Hello"
"World123"
https://ideone.com/85WR59
language:
Haskell (ghc 8.4.4)
created:
4 years ago
visibility:
public

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