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{-# LANGUAGE ScopedTypeVariables #-}
module ControlMaybe where
-- import GHC.IO.Exception (IOException(..))
import Control.Exception as Exception (IOException(..),catch)
withJust (Just x) f = f x
withJust Nothing f = return ()
whenJust acn f = do
x <- acn
withJust x f
catchIO_ :: IO a -> IO a -> IO a
catchIO_ a h = Exception.catch a (\(_ :: IOException) -> h)
handleIO_ = flip catchIO_
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