ST safety: nested computations
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| Language | Haskell |
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| Owner | rightfold |
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| Visibility | Public |
import Control.Monad.ST
import Data.STRef
f :: Int
f = runST $ do
x <- newSTRef 1
return $ runST $ do
x' <- readSTRef x
return x'
main = putStrLn "Hello World!"
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