Header files not moc'ed if containing just Q_NAMESPACE/Q_ENUM_NS (without Q_OBJECT)

// my_enum.h

namespace my_enum
{
   Q_NAMESPACE
   enum class MyEnum
   {
      One,
      Two
   };
   Q_ENUM_NS(MyEnum)
}

namespace my_enum {
  ...
  class Dummy : QObject
  {
    Q_OBJECT
  };
}