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Sprout/sprout/utility/as_const.hpp
2019-01-07 17:47:17 +09:00

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/*=============================================================================
Copyright (c) 2011-2019 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_UTILITY_AS_CONST_HPP
#define SPROUT_UTILITY_AS_CONST_HPP
#include <type_traits>
#include <sprout/config.hpp>
#include <sprout/utility/forward.hpp>
namespace sprout {
//
// as_const
//
template<typename T>
inline SPROUT_CONSTEXPR typename std::conditional<
std::is_lvalue_reference<T>::value,
typename std::remove_reference<T>::type const&,
typename std::remove_reference<T>::type const&&
>::type
as_const(T&& t) {
return SPROUT_FORWARD(T, t);
}
} // namespace sprout
#endif // #ifndef SPROUT_UTILITY_AS_CONST_HPP