relation.hpp

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// This file is a part of NiHu, a C++ BEM template library.
//
// Copyright (C) 2012-2014  Peter Fiala <fiala@hit.bme.hu>
// Copyright (C) 2012-2014  Peter Rucz <rucz@hit.bme.hu>
//
// This program 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.
//
// This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
 
#ifndef RELATION_HPP_INCLUDED
#define RELATION_HPP_INCLUDED
 
#include <type_traits>
 
namespace tmp
{
    template <class N, class M> struct less;
 
    template <class N, class M> struct greater;
 
    template <class Val, class...Args>
    struct max_ : max_<Val, typename max_<Args...>::type> {};
 
    template <class Val1, class Val2>
    struct max_<Val1, Val2> : std::conditional<
        greater<Val1, Val2>::value,
        Val1, Val2
    > {};
 
    template <class Val, class...Args>
    struct min_ : min_<Val, typename min_<Args...>::type> {};
 
    template <class Val1, class Val2>
    struct min_<Val1, Val2> : std::conditional<
        less<Val1, Val2>::value,
        Val1, Val2
    > {};
}
 
#endif /* RELATION_HPP_INCLUDED */