Warning fix for unused and redundant imports

[ghc-hetmet.git] / compiler / utils / Panic.lhs

diff --git a/compiler/utils/Panic.lhs b/compiler/utils/Panic.lhs
index 1a74d5d..300e7fc 100644 (file)
--- a/compiler/utils/Panic.lhs
+++ b/compiler/utils/Panic.lhs
@@ -1,7 +1,7 @@
 %
+% (c) The University of Glasgow 2006
 % (c) The GRASP Project, Glasgow University, 1992-2000
 %
-\section{Panic error messages}
 
 Defines basic funtions for printing error messages.
 
@@ -39,24 +39,15 @@ import Posix                ( Handler(Catch), installHandler, sigINT, sigQUIT )
 import GHC.ConsoleHandler
 #endif
 
-# if __GLASGOW_HASKELL__ < 500
-import EXCEPTION        ( raiseInThread )
-# else
-import EXCEPTION       ( throwTo )
-# endif /* GHC < 500 */
-
-#if __GLASGOW_HASKELL__ > 408
-import EXCEPTION       ( catchJust, tryJust, ioErrors )
-#endif
-
-import CONCURRENT      ( myThreadId, MVar, ThreadId, withMVar, newEmptyMVar )
-import DYNAMIC
-import qualified EXCEPTION as Exception
-import TRACE           ( trace )
-import UNSAFE_IO       ( unsafePerformIO )
-import IO              ( isUserError )
-
-import System
+import Control.Exception
+import Control.Concurrent ( MVar, ThreadId, withMVar, newMVar )
+import Data.Dynamic
+import qualified Control.Exception as Exception
+import Debug.Trace     ( trace )
+import System.IO.Unsafe        ( unsafePerformIO )
+import System.IO.Error ( isUserError )
+import System.Exit
+import System.Environment
 \end{code}
 
 GHC's own exception type.
@@ -180,33 +171,14 @@ tryMost action = do r <- try action; filter r
 tryUser :: IO a -> IO (Either Exception.Exception a)
 tryUser action = tryJust tc_errors action
   where 
-#if __GLASGOW_HASKELL__ > 504 || __GLASGOW_HASKELL__ < 500
+#if __GLASGOW_HASKELL__ > 504
        tc_errors e@(Exception.IOException ioe) | isUserError ioe = Just e
-#elif __GLASGOW_HASKELL__ == 502
-       tc_errors e@(UserError _) = Just e
 #else 
        tc_errors e@(Exception.IOException ioe) | isUserError e = Just e
 #endif
        tc_errors _other = Nothing
 \end{code}     
 
-Compatibility stuff:
-
-\begin{code}
-#if __GLASGOW_HASKELL__ <= 408
-try = Exception.tryAllIO
-#else
-try = Exception.try
-#endif
-
-#if __GLASGOW_HASKELL__ <= 408
-catchJust = Exception.catchIO
-tryJust   = Exception.tryIO
-ioErrors  = Exception.justIoErrors
-throwTo   = Exception.raiseInThread
-#endif
-\end{code}
-
 Standard signal handlers for catching ^C, which just throw an
 exception in the target thread.  The current target thread is
 the thread at the head of the list in the MVar passed to
@@ -246,5 +218,5 @@ installSignalHandlers = do
 
 {-# NOINLINE interruptTargetThread #-}
 interruptTargetThread :: MVar [ThreadId]
-interruptTargetThread = unsafePerformIO newEmptyMVar
+interruptTargetThread = unsafePerformIO (newMVar [])
 \end{code}