| #ifndef BOOST_SMART_PTR_DETAIL_SP_FORWARD_HPP_INCLUDED |
| #define BOOST_SMART_PTR_DETAIL_SP_FORWARD_HPP_INCLUDED |
| |
| // MS compatible compilers support #pragma once |
| |
| #if defined(_MSC_VER) && (_MSC_VER >= 1020) |
| # pragma once |
| #endif |
| |
| // detail/sp_forward.hpp |
| // |
| // Copyright 2008,2012 Peter Dimov |
| // |
| // 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 |
| |
| #include <boost/config.hpp> |
| |
| namespace boost |
| { |
| |
| namespace detail |
| { |
| |
| #if !defined( BOOST_NO_CXX11_RVALUE_REFERENCES ) |
| |
| #if defined( BOOST_GCC ) && __GNUC__ * 100 + __GNUC_MINOR__ <= 404 |
| |
| // GCC 4.4 supports an outdated version of rvalue references and creates a copy of the forwarded object. |
| // This results in warnings 'returning reference to temporary'. Therefore we use a special version similar to std::forward. |
| template< class T > T&& sp_forward( T && t ) BOOST_NOEXCEPT |
| { |
| return t; |
| } |
| |
| #else |
| |
| template< class T > T&& sp_forward( T & t ) BOOST_NOEXCEPT |
| { |
| return static_cast< T&& >( t ); |
| } |
| |
| #endif |
| |
| #endif |
| |
| } // namespace detail |
| |
| } // namespace boost |
| |
| #endif // #ifndef BOOST_SMART_PTR_DETAIL_SP_FORWARD_HPP_INCLUDED |