X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=Prelude.hs;h=61bd27eb8bd1121a21f16b3a5982b324bda59125;hb=37ab854f9d2c1280117658bbd29919968f4f4585;hp=8eb912bffa412d9ee568f4dccf7336d1cd258d48;hpb=8e9892cd14b7558649fcd9ba0597805eb57505b3;p=ghc-base.git

diff --git a/Prelude.hs b/Prelude.hs
index 8eb912b..61bd27e 100644
--- a/Prelude.hs
+++ b/Prelude.hs
@@ -146,22 +146,17 @@ module Prelude (
 #ifndef __HUGS__
 import Control.Monad
 import System.IO
-import Text.Read
-import Text.Show
+import System.IO.Error
 import Data.List
 import Data.Either
 import Data.Maybe
-import Data.Bool
 import Data.Tuple
-import Data.Eq
-import Data.Ord
 #endif
 
 #ifdef __GLASGOW_HASKELL__
 import GHC.Base
 import GHC.IOBase
-import GHC.Exception
-import GHC.Read
+import Text.Read
 import GHC.Enum
 import GHC.Num
 import GHC.Real
@@ -170,8 +165,6 @@ import GHC.Show
 import GHC.Err   ( error, undefined )
 #endif
 
-import qualified Control.OldException as Old
-
 #ifdef __HUGS__
 import Hugs.Prelude
 #endif
@@ -194,27 +187,3 @@ f $! x  = x `seq` f x
 seq :: a -> b -> b
 seq _ y = y
 #endif
-
--- | 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 io handler = io `Old.catch` handler'
-    where handler' (Old.IOException ioe) = handler ioe
-          handler' e                     = throw e
-