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module T4114bSub (assertKeep, assertNoKeep) where
import Control.Monad (unless, when)
import System.Directory (doesFileExist)
assertNoKeep :: FilePath -> IO ()
assertNoKeep a =
whenM (doesFileExist a) $
error ("error: intermediate '" ++ a ++ "' exists")
assertKeep :: FilePath -> IO ()
assertKeep a =
unlessM (doesFileExist a) $
error ("error: intermediate '" ++ a ++ "' is missing")
whenM :: Monad m => m Bool -> m () -> m ()
whenM mp f = mp >>= \p -> when p f
unlessM :: Monad m => m Bool -> m () -> m ()
unlessM mp f = mp >>= \p -> unless p f
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