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[ghc-hetmet.git]
/
ghc
/
tests
/
lib
/
IORef
/
ioref001.hs
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{-# OPTIONS -fglasgow-exts #-}
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module Main where
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import IORef
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loop r 0 = return ()
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loop r c = loop r (c-1) >> writeIORef r 42
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main = newIORef 0 >>= \r -> loop r 1000000 >> putStrLn "done"