2 // Copyright (c) 2020 Krystian Stasiowski (sdkrystian@gmail.com)
4 // Distributed under the Boost Software License, Version 1.0. (See accompanying
5 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
8 #ifndef EXAMPLE_ISSUE_34_HPP
9 #define EXAMPLE_ISSUE_34_HPP
22 /** Private base classes should be hidden.