[NFC] Fix unused expression warning introduced in r338884

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@338886 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/include/clang/Basic/Attr.td b/include/clang/Basic/Attr.td
index 0fffce42ac6d77a3c7866ce423f53f200c922118..191bfd50f2139dc65491ce7cefeff0a485099330 100644 (file)
--- a/include/clang/Basic/Attr.td
+++ b/include/clang/Basic/Attr.td
@@ -145,8 +145,9 @@ def HasFunctionProto : SubsetSubject<DeclBase,
 // function. Accepted as a function type attribute on the type of such a
 // member function.
 // FIXME: This does not actually ever match currently.
-def ImplicitObjectParameter : SubsetSubject<Function, [{S, false}],
-                                            "implicit object parameters">;
+def ImplicitObjectParameter
+    : SubsetSubject<Function, [ {static_cast<void>(S), false} ],
+                    "implicit object parameters">;
 
 // A single argument to an attribute
 class Argument<string name, bit optional, bit fake = 0> {