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- //
- // detail/non_const_lvalue.hpp
- // ~~~~~~~~~~~~~~~~~~~~~~~~~~~
- //
- // Copyright (c) 2003-2019 Christopher M. Kohlhoff (chris at kohlhoff dot com)
- //
- // 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 ASIO_DETAIL_NON_CONST_LVALUE_HPP
- #define ASIO_DETAIL_NON_CONST_LVALUE_HPP
-
- #if defined(_MSC_VER) && (_MSC_VER >= 1200)
- # pragma once
- #endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
-
- #include "asio/detail/config.hpp"
- #include "asio/detail/type_traits.hpp"
-
- #include "asio/detail/push_options.hpp"
-
- namespace asio {
- namespace detail {
-
- template <typename T>
- struct non_const_lvalue
- {
- #if defined(ASIO_HAS_MOVE)
- explicit non_const_lvalue(T& t)
- : value(static_cast<typename conditional<
- is_same<T, typename decay<T>::type>::value,
- typename decay<T>::type&, T&&>::type>(t))
- {
- }
-
- typename conditional<is_same<T, typename decay<T>::type>::value,
- typename decay<T>::type&, typename decay<T>::type>::type value;
- #else // defined(ASIO_HAS_MOVE) || defined(GENERATING_DOCUMENTATION)
- explicit non_const_lvalue(const typename decay<T>::type& t)
- : value(t)
- {
- }
-
- typename decay<T>::type value;
- #endif // defined(ASIO_HAS_MOVE)
- };
-
- } // namespace detail
- } // namespace asio
-
- #include "asio/detail/pop_options.hpp"
-
- #endif // ASIO_DETAIL_NON_CONST_LVALUE_HPP
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