minus.hpp

// Copyright (C) 2013, Ennio Barbaro.
//
// Use, modification, and distribution is subject to the Boost Software
// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
//
// See http://sbabbi.github.io/tinympl for documentation.
//
// You are welcome to contact the author at:
//  enniobarbaro@gmail.com
//

#ifndef TINYMPL_MINUS_HPP
#define TINYMPL_MINUS_HPP

#include <type_traits>

namespace tinympl {

template<class A,class B> struct minus :
    std::integral_constant<
        typename std::common_type<
            typename A::value_type,
            typename B::value_type>::type,
        A::value - B::value>
{};


} // namespace tinympl

#endif // TINYMPL_MINUS_HPP