Make TcUnify warning-free

[ghc-hetmet.git] / compiler / basicTypes / NameSet.lhs

diff --git a/compiler/basicTypes/NameSet.lhs b/compiler/basicTypes/NameSet.lhs
index 2100fc5..e60ea23 100644 (file)
--- a/compiler/basicTypes/NameSet.lhs
+++ b/compiler/basicTypes/NameSet.lhs
@@ -1,7 +1,7 @@
 %
+% (c) The University of Glasgow 2006
 % (c) The GRASP/AQUA Project, Glasgow University, 1998
 %
-\section[NameSet]{@NameSets@} 
 
 \begin{code}
 module NameSet (
@@ -28,7 +28,6 @@ import Name
 import UniqSet
 \end{code}
 
-
 %************************************************************************
 %*                                                                     *
 \subsection[Sets of names}
@@ -98,6 +97,7 @@ mkFVs  :: [Name] -> FreeVars
 delFV    :: Name -> FreeVars -> FreeVars
 delFVs   :: [Name] -> FreeVars -> FreeVars
 
+isEmptyFVs :: NameSet -> Bool
 isEmptyFVs  = isEmptyNameSet
 emptyFVs    = emptyNameSet
 plusFVs     = unionManyNameSets
@@ -148,14 +148,14 @@ plusDU = (++)
 duDefs :: DefUses -> Defs
 duDefs dus = foldr get emptyNameSet dus
   where
-    get (Nothing, u1) d2 = d2
-    get (Just d1, u1) d2 = d1 `unionNameSets` d2
+    get (Nothing, _u1) d2 = d2
+    get (Just d1, _u1) d2 = d1 `unionNameSets` d2
 
 duUses :: DefUses -> Uses
 -- Just like allUses, but defs are not eliminated
 duUses dus = foldr get emptyNameSet dus
   where
-    get (d1, u1) u2 = u1 `unionNameSets` u2
+    get (_d1, u1) u2 = u1 `unionNameSets` u2
 
 allUses :: DefUses -> Uses
 -- Collect all uses, regardless of
@@ -187,4 +187,4 @@ findUses dus uses
        = rhs_uses `unionNameSets` uses
        | otherwise     -- No def is used
        = uses
-\end{code}
\ No newline at end of file
+\end{code}