visitor.hpp

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//This file is part of Bertini 2.
//
//visitor.hpp is free software: you can redistribute it and/or modify
//it under the terms of the GNU General Public License as published by
//the Free Software Foundation, either version 3 of the License, or
//(at your option) any later version.
//
//visitor.hpp is distributed in the hope that it will be useful,
//but WITHOUT ANY WARRANTY; without even the implied warranty of
//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//GNU General Public License for more details.
//
//You should have received a copy of the GNU General Public License
//along with visitor.hpp.  If not, see <http://www.gnu.org/licenses/>.
//
// Copyright(C) 2015 - 2021 by Bertini2 Development Team
//
// See <http://www.gnu.org/licenses/> for a copy of the license, 
// as well as COPYING.  Bertini2 is provided with permitted 
// additional terms in the b2/licenses/ directory.
 
// individual authors of this file include:
// silviana amethyst, university of wisconsin-eau claire
//

 
#ifndef BERTINI_DETAIL_VISITOR_HPP
#define BERTINI_DETAIL_VISITOR_HPP
#include <boost/type_index.hpp>
 
namespace bertini{

    class VisitorBase
    { BOOST_TYPE_INDEX_REGISTER_CLASS
    public:
        virtual ~VisitorBase() = default;
    };
 

    template<class VisitedT, typename RetT = void>
    class Visitor
    { BOOST_TYPE_INDEX_REGISTER_CLASS
    public:
        typedef RetT ReturnType;
        virtual ReturnType Visit(VisitedT const &) = 0;
        virtual ~Visitor() = default;
    };
 
    
 
}
 
#endif