X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;ds=sidebyside;f=compiler%2Frename%2FRnTypes.lhs;fp=compiler%2Frename%2FRnTypes.lhs;h=cb60b934d2907c1f387706be0f4886c74b63e237;hb=354d1eb692be9fa5683dab82258062ebc61fdb2d;hp=b739d6d3a871aa8fb3e56f8ea97a2333683f3cda;hpb=362750fbc91116ccc12b8b30d9a496803fa036f3;p=ghc-hetmet.git

diff --git a/compiler/rename/RnTypes.lhs b/compiler/rename/RnTypes.lhs
index b739d6d..cb60b93 100644
--- a/compiler/rename/RnTypes.lhs
+++ b/compiler/rename/RnTypes.lhs
@@ -459,18 +459,18 @@ not_op_pat (ConPatIn _ (InfixCon _ _)) = False
 not_op_pat _        	               = True
 
 --------------------------------------
-checkPrecMatch :: Bool -> Name -> MatchGroup Name -> RnM ()
-	-- True indicates an infix lhs
-	-- See comments with rnExpr (OpApp ...) about "deriving"
+checkPrecMatch :: Name -> MatchGroup Name -> RnM ()
+  -- Check precedence of a function binding written infix
+  --   eg  a `op` b `C` c = ...
+  -- See comments with rnExpr (OpApp ...) about "deriving"
 
-checkPrecMatch False _ _
-  = return ()
-checkPrecMatch True op (MatchGroup ms _)	
+checkPrecMatch op (MatchGroup ms _)	
   = mapM_ check ms			 	
   where
-    check (L _ (Match (p1:p2:_) _ _))
-      = do checkPrec op (unLoc p1) False
-           checkPrec op (unLoc p2) True
+    check (L _ (Match (L l1 p1 : L l2 p2 :_) _ _))
+      = setSrcSpan (combineSrcSpans l1 l2) $
+        do checkPrec op p1 False
+           checkPrec op p2 True
 
     check _ = return ()	
 	-- This can happen.  Consider