55 lines
1.4 KiB
C++
55 lines
1.4 KiB
C++
//
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// detail/non_const_lvalue.hpp
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// ~~~~~~~~~~~~~~~~~~~~~~~~~~~
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//
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// Copyright (c) 2003-2021 Christopher M. Kohlhoff (chris at kohlhoff dot com)
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#ifndef ASIO_DETAIL_NON_CONST_LVALUE_HPP
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#define ASIO_DETAIL_NON_CONST_LVALUE_HPP
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#if defined(_MSC_VER) && (_MSC_VER >= 1200)
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# pragma once
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#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
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#include "asio/detail/config.hpp"
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#include "asio/detail/type_traits.hpp"
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#include "asio/detail/push_options.hpp"
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namespace asio {
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namespace detail {
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template <typename T>
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struct non_const_lvalue
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{
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#if defined(ASIO_HAS_MOVE)
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explicit non_const_lvalue(T& t)
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: value(static_cast<typename conditional<
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is_same<T, typename decay<T>::type>::value,
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typename decay<T>::type&, T&&>::type>(t))
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{
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}
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typename conditional<is_same<T, typename decay<T>::type>::value,
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typename decay<T>::type&, typename decay<T>::type>::type value;
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#else // defined(ASIO_HAS_MOVE) || defined(GENERATING_DOCUMENTATION)
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explicit non_const_lvalue(const typename decay<T>::type& t)
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: value(t)
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{
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}
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typename decay<T>::type value;
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#endif // defined(ASIO_HAS_MOVE)
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};
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} // namespace detail
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} // namespace asio
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#include "asio/detail/pop_options.hpp"
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#endif // ASIO_DETAIL_NON_CONST_LVALUE_HPP
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