Sprout/sprout/tpp/algorithm/max_element.hpp
bolero-MURAKAMI bf0c7021cf modify namespace result_of -> results
support C++14 type_traits
2013-11-20 22:04:11 +09:00

50 lines
1.8 KiB
C++

/*=============================================================================
Copyright (c) 2011-2013 Bolero MURAKAMI
https://github.com/bolero-MURAKAMI/Sprout
Distributed under 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)
=============================================================================*/
#ifndef SPROUT_TPP_ALGORITHM_MAX_ELEMENT_HPP
#define SPROUT_TPP_ALGORITHM_MAX_ELEMENT_HPP
#include <sprout/config.hpp>
#include <sprout/type_traits/integral_constant.hpp>
#include <sprout/type_traits/common_decay.hpp>
namespace sprout {
namespace tpp {
namespace detail {
template<typename T, T... Values>
struct max_element_impl;
template<typename T, T Value>
struct max_element_impl<T, Value>
: public sprout::integral_constant<T, Value>
{};
template<typename T, T Value1, T Value2>
struct max_element_impl<T, Value1, Value2>
: public sprout::integral_constant<T, (Value1 < Value2 ? Value2 : Value1)>
{};
template<typename T, T Value1, T Value2, T... Tail>
struct max_element_impl<T, Value1, Value2, Tail...>
: public sprout::tpp::detail::max_element_impl<T, sprout::tpp::detail::max_element_impl<T, Value1, Value2>::value, Tail...>
{};
} // namespace detail
//
// max_element_c
//
template<typename T, T... Values>
struct max_element_c
: public sprout::tpp::detail::max_element_impl<T, Values...>
{};
//
// max_element
//
template<typename... Types>
struct max_element
: public sprout::tpp::max_element_c<typename sprout::common_decay<decltype(Types::value)...>::type, Types::value...>
{};
} // namespace tpp
} // namespace sprout
#endif // #ifndef SPROUT_TPP_ALGORITHM_MAX_ELEMENT_HPP