Method is_undef

include/chaiscript/dispatchkit/boxed_value.hpp:230–233

return true if the object is uninitialized

      /// return true if the object is uninitialized
      bool is_undef() const noexcept
      {
        return m_data->m_type_info.is_undef();
      }

      bool is_const() const noexcept
      {