[project @ 2003-11-10 12:04:25 by simonpj]

Better error message for ghc --show-iface, with no file supplied

diff --git a/ghc/compiler/main/DriverFlags.hs b/ghc/compiler/main/DriverFlags.hs
index 0ea708b..f159b39 100644 (file)
--- a/ghc/compiler/main/DriverFlags.hs
+++ b/ghc/compiler/main/DriverFlags.hs
@@ -93,7 +93,7 @@ processOneArg action rest (dash_arg@('-':arg):args) =
                if rest /= "" 
                        then fio rest >> return args
                        else case args of
-                               [] -> unknownFlagErr dash_arg
+                               [] -> missingArgErr dash_arg
                                (arg1:args1) -> fio arg1 >> return args1
 
        SepArg fio -> 

diff --git a/ghc/compiler/main/DriverUtil.hs b/ghc/compiler/main/DriverUtil.hs
index d8fe68c..0896f5b 100644 (file)
--- a/ghc/compiler/main/DriverUtil.hs
+++ b/ghc/compiler/main/DriverUtil.hs
@@ -1,5 +1,5 @@
 -----------------------------------------------------------------------------
--- $Id: DriverUtil.hs,v 1.39 2003/08/20 15:07:57 simonmar Exp $
+-- $Id: DriverUtil.hs,v 1.40 2003/11/10 12:04:25 simonpj Exp $
 --
 -- Utils for the driver
 --
@@ -101,6 +101,9 @@ unknownFlagErr f = throwDyn (UsageError ("unrecognised flag: " ++ f))
 unknownFlagsErr :: [String] -> a
 unknownFlagsErr fs = throwDyn (UsageError ("unrecognised flags: " ++ unwords fs))
 
+missingArgErr :: String -> a
+missingArgErr f = throwDyn (UsageError ("missing argument for flag: " ++ f))
+
 my_partition :: (a -> Maybe b) -> [a] -> ([(a,b)],[a])
 my_partition _ [] = ([],[])
 my_partition p (a:as)