Make TcUnify warning-free

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

diff --git a/compiler/basicTypes/NameSet.lhs b/compiler/basicTypes/NameSet.lhs
index 5c2c1b8..e60ea23 100644 (file)
--- a/compiler/basicTypes/NameSet.lhs
+++ b/compiler/basicTypes/NameSet.lhs
@@ -97,6 +97,7 @@ mkFVs  :: [Name] -> FreeVars
 delFV    :: Name -> FreeVars -> FreeVars
 delFVs   :: [Name] -> FreeVars -> FreeVars
 
+isEmptyFVs :: NameSet -> Bool
 isEmptyFVs  = isEmptyNameSet
 emptyFVs    = emptyNameSet
 plusFVs     = unionManyNameSets
@@ -147,14 +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