From 22df1e2a699d6eda6d5ada5073bc97c9f35e2947 Mon Sep 17 00:00:00 2001
From: simonpj <unknown>
Date: Fri, 12 Aug 2005 08:32:16 +0000
Subject: [PATCH] [project @ 2005-08-12 08:32:16 by simonpj] Grr: another
 wibble to duplicate signature detection

---
 ghc/compiler/rename/RnBinds.lhs |   13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/ghc/compiler/rename/RnBinds.lhs b/ghc/compiler/rename/RnBinds.lhs
index 96ce11b..f067e5d 100644
--- a/ghc/compiler/rename/RnBinds.lhs
+++ b/ghc/compiler/rename/RnBinds.lhs
@@ -45,6 +45,7 @@ import Digraph		( SCC(..), stronglyConnComp )
 import Bag
 import Outputable
 import Maybes		( orElse, fromJust, isJust )
+import Util		( filterOut )
 import Monad		( foldM )
 \end{code}
 
@@ -501,14 +502,14 @@ check_sigs :: (LSig Name -> Bool) -> [LSig Name] -> RnM ()
 check_sigs ok_sig sigs 
 	-- Check for (a) duplicate signatures
 	--	     (b) signatures for things not in this group
-  = do	{ mappM_ unknownSigErr (filter bad sigs)
-	; mappM_ dupSigDeclErr (findDupsEq eqHsSig sigs) }
+  = do	{ mappM_ unknownSigErr (filter (not . ok_sig) sigs')
+	; mappM_ dupSigDeclErr (findDupsEq eqHsSig sigs') }
   where
 	-- Don't complain about an unbound name again
-    bad sig = not (ok_sig sig) && 
-	      case sigName sig of
-		Just n | isUnboundName n -> False
-		other			 -> True
+    sigs' = filterOut bad_name sigs
+    bad_name sig = case sigName sig of
+			Just n -> isUnboundName n
+			other  -> False
 
 -- We use lookupLocatedSigOccRn in the signatures, which is a little bit unsatisfactory
 -- because this won't work for:
-- 
1.7.10.4