add dummy mangling

Author: changkhothuychung

clang/lib/AST/ItaniumMangle.cpp

@@ -4945,6 +4945,12 @@ void CXXNameMangler::mangleExpression(const Expr *E, unsigned Arity,
     E = cast<ConstantExpr>(E)->getSubExpr();
     goto recurse;
 
+  case Expr::CXXReflectExprClass: {
+    // TODO: implement this after introducing std::meta::info
+    // and add info in APValue
+    break;
+  }
+
   // FIXME: invent manglings for all these.
   case Expr::BlockExprClass:
   case Expr::ChooseExprClass: