X-Git-Url: http://git.megacz.com/?p=ghc-base.git;a=blobdiff_plain;f=Prelude.hs;h=4c183ae38c9ad44a22a25c4bba5fa9149066cb62;hp=050da0487c10b4c5f12fbe703a95a464dff515d0;hb=HEAD;hpb=b205b53b0078599aa77d9afc759aa333c1f565a1

diff --git a/Prelude.hs b/Prelude.hs
index 050da04..4c183ae 100644
--- a/Prelude.hs
+++ b/Prelude.hs
@@ -1,4 +1,5 @@
-{-# OPTIONS_GHC -XNoImplicitPrelude #-}
+{-# LANGUAGE CPP, NoImplicitPrelude, BangPatterns #-}
+
 -----------------------------------------------------------------------------
 -- |
 -- Module      :  Prelude
@@ -146,6 +147,7 @@ module Prelude (
 #ifndef __HUGS__
 import Control.Monad
 import System.IO
+import System.IO.Error
 import Data.List
 import Data.Either
 import Data.Maybe
@@ -154,19 +156,15 @@ import Data.Tuple
 
 #ifdef __GLASGOW_HASKELL__
 import GHC.Base
-import GHC.IOBase
-import GHC.Exception ( throw )
+-- import GHC.IO
+-- import GHC.IO.Exception
 import Text.Read
 import GHC.Enum
 import GHC.Num
 import GHC.Real
 import GHC.Float
 import GHC.Show
-import GHC.Err   ( error, undefined )
-#endif
-
-#ifndef __HUGS__
-import qualified Control.Exception.Base as New (catch)
+import GHC.Err   ( undefined )
 #endif
 
 #ifdef __HUGS__
@@ -175,12 +173,16 @@ import Hugs.Prelude
 
 #ifndef __HUGS__
 infixr 0 $!
+#endif
 
 -- -----------------------------------------------------------------------------
 -- Miscellaneous functions
 
 -- | Strict (call-by-value) application, defined in terms of 'seq'.
 ($!)    :: (a -> b) -> a -> b
+#ifdef __GLASGOW_HASKELL__
+f $! x  = let !vx = x in f vx  -- see #2273
+#elif !defined(__HUGS__)
 f $! x  = x `seq` f x
 #endif
 
@@ -191,26 +193,3 @@ f $! x  = x `seq` f x
 seq :: a -> b -> b
 seq _ y = y
 #endif
-
-#ifndef __HUGS__
--- | The 'catch' function establishes a handler that receives any 'IOError'
--- raised in the action protected by 'catch'.  An 'IOError' is caught by
--- the most recent handler established by 'catch'.  These handlers are
--- not selective: all 'IOError's are caught.  Exception propagation
--- must be explicitly provided in a handler by re-raising any unwanted
--- exceptions.  For example, in
---
--- > f = catch g (\e -> if IO.isEOFError e then return [] else ioError e)
---
--- the function @f@ returns @[]@ when an end-of-file exception
--- (cf. 'System.IO.Error.isEOFError') occurs in @g@; otherwise, the
--- exception is propagated to the next outer handler.
---
--- When an exception propagates outside the main program, the Haskell
--- system prints the associated 'IOError' value and exits the program.
---
--- Non-I\/O exceptions are not caught by this variant; to catch all
--- exceptions, use 'Control.Exception.catch' from "Control.Exception".
-catch :: IO a -> (IOError -> IO a) -> IO a
-catch = New.catch
-#endif /* !__HUGS__ */