+% ------------------------------------------------------------------------------
+% $Id: PrelMain.lhs,v 1.9 2001/05/21 14:07:31 simonmar Exp $
%
-% (c) The AQUA Project, Glasgow University, 1994-1997
+% (c) The University of Glasgow, 1994-2000
%
\section[PrelMain]{Module @PrelMain@}
\begin{code}
-{-# OPTIONS -#include "cbits/stgio.h" #-}
-
module PrelMain( mainIO ) where
-import Prelude
import {-# SOURCE #-} qualified Main -- for type of "Main.main"
-import IO ( hFlush, hPutStr, stdout, stderr )
-import PrelAddr ( Addr )
+
+import IO
import PrelException
-import PrelPack ( packString )
-import PrelArr ( ByteArray(..) )
-\end{code}
+import PrelTopHandler
-\begin{code}
mainIO :: IO () -- It must be of type (IO t) because that's what
-- the RTS expects. GHC doesn't check this, so
-- make sure this type signature stays!
-mainIO = catchException Main.main handler
-
--- make sure we handle errors while reporting the error!
--- (e.g. evaluating the string passed to 'error' might generate
--- another error, etc.)
-
-handler :: Exception -> IO ()
-handler err = catchException (real_handler err) handler
-
-real_handler :: Exception -> IO ()
-real_handler ex =
- case ex of
- ErrorCall s -> reportError s
- other -> reportError (showsPrec 0 other "\n")
-
-reportError :: String -> IO ()
-reportError str = do
- (hFlush stdout) `catchException` (\ _ -> return ())
- let bs@(ByteArray (_,len) _) = packString str
- _ccall_ writeErrString__ (``&ErrorHdrHook''::Addr) bs len
- _ccall_ stg_exit (1::Int)
-
+mainIO = catchException Main.main topHandler
\end{code}