[project @ 2003-08-20 15:07:56 by simonmar]

Use Util.maybePrefixMatch instead of DriverUtil.my_prefix_match, and
remove the latter.

ghc/compiler/main/DriverFlags.hs

 -----------------------------------------------------------------------------
--- $Id: DriverFlags.hs,v 1.119 2003/08/11 08:53:39 simonmar Exp $
+-- $Id: DriverFlags.hs,v 1.120 2003/08/20 15:07:56 simonmar Exp $
 --
 -- Driver flags
 --
@@ -127,7 +127,7 @@ findArg :: [(String,OptKind)] -> String -> Maybe (String,OptKind)
 findArg spec arg
   = case [ (remove_spaces rest, k) 
 	 | (pat,k)   <- spec, 
-	   Just rest <- [my_prefix_match pat arg],
+	   Just rest <- [maybePrefixMatch pat arg],
 	   arg_ok k rest arg ] 
     of
 	[]      -> Nothing

ghc/compiler/main/DriverUtil.hs

 -----------------------------------------------------------------------------
--- $Id: DriverUtil.hs,v 1.38 2003/06/04 15:47:59 simonmar Exp $
+-- $Id: DriverUtil.hs,v 1.39 2003/08/20 15:07:57 simonmar Exp $
 --
 -- Utils for the driver
 --
@@ -51,9 +51,9 @@ getOptionsFromSource file
 		   | otherwise -> return []
 
 matchOptions s
-  | Just s1 <- my_prefix_match "{-#" s, -- -}
-    Just s2 <- my_prefix_match "OPTIONS" (remove_spaces s1),
-    Just s3 <- my_prefix_match "}-#" (reverse s2)
+  | Just s1 <- maybePrefixMatch "{-#" s, -- -}
+    Just s2 <- maybePrefixMatch "OPTIONS" (remove_spaces s1),
+    Just s3 <- maybePrefixMatch "}-#" (reverse s2)
   = Just (reverse s3)
   | otherwise
   = Nothing
@@ -109,13 +109,6 @@ my_partition p (a:as)
 	Nothing -> (bs,a:cs)
 	Just b  -> ((a,b):bs,cs)
 
-my_prefix_match :: String -> String -> Maybe String
-my_prefix_match []    rest = Just rest
-my_prefix_match (_:_) []   = Nothing
-my_prefix_match (p:pat) (r:rest)
-  | p == r    = my_prefix_match pat rest
-  | otherwise = Nothing
-
 later = flip finally
 
 handleDyn :: Typeable ex => (ex -> IO a) -> IO a -> IO a

ghc/compiler/main/Finder.lhs

@@ -278,7 +278,7 @@ mkHomeModLocation mod_name src_filename = do
    let mod_basename = dots_to_slashes (moduleNameUserString mod_name)
        (basename,extension) = splitFilename src_filename
 
-   case my_prefix_match (reverse mod_basename) (reverse basename) of
+   case maybePrefixMatch (reverse mod_basename) (reverse basename) of
 	Just ""   ->
 	   mkHomeModLocationSearched mod_name "."  mod_basename extension
 	Just rest -> do