Silence a warning by giving Parser::FieldCallback a virtual destructor, and

anchor the vtable to Parser.cpp for good measure.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@85927 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 11 insertions, 0 deletions

diff --git a/include/clang/Parse/Parser.h b/include/clang/Parse/Parser.h
index 14dc8f8e36..3849f9d0d5 100644
--- a/include/clang/Parse/Parser.h
+++ b/include/clang/Parse/Parser.h
@@ -983,6 +983,10 @@ private:
 
   struct FieldCallback {
     virtual DeclPtrTy invoke(FieldDeclarator &Field) = 0;
+    virtual ~FieldCallback() {}
+
+  private:
+    virtual void _anchor();
   };
 
   void ParseStructDeclaration(DeclSpec &DS, FieldCallback &Callback);
diff --git a/lib/Parse/Parser.cpp b/lib/Parse/Parser.cpp
index e69cb72a0a..cc4aec6297 100644
--- a/lib/Parse/Parser.cpp
+++ b/lib/Parse/Parser.cpp
@@ -1019,3 +1019,10 @@ bool Parser::TryAnnotateCXXScopeToken(bool EnteringContext) {
   PP.AnnotateCachedTokens(Tok);
   return true;
 }
+
+// Anchor the Parser::FieldCallback vtable to this translation unit.
+// We use a spurious method instead of the destructor because
+// destroying FieldCallbacks can actually be slightly
+// performance-sensitive.
+void Parser::FieldCallback::_anchor() {
+}