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// Copyright 2014-2017 Insight Software Consortium.
// Copyright 2004-2009 Roman Yakovenko.
// Distributed under the Boost Software License, Version 1.0.
// See http://www.boost.org/LICENSE_1_0.txt
#ifndef __abstract_classes_hpp__
#define __abstract_classes_hpp__
namespace abstract_classes{
class abstract_i{
virtual int do_your_things() const = 0;
};
class derived_abstract_i: public abstract_i{
};
class implementation : public abstract_i{
virtual int do_your_things() const
{ return 1; }
};
}
#endif//__abstract_classes_hpp__
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