1 #ifndef BOOST_SMART_PTR_DETAIL_SP_FORWARD_HPP_INCLUDED
2 #define BOOST_SMART_PTR_DETAIL_SP_FORWARD_HPP_INCLUDED
4 // MS compatible compilers support #pragma once
6 #if defined(_MSC_VER) && (_MSC_VER >= 1020)
10 // detail/sp_forward.hpp
12 // Copyright 2008,2012 Peter Dimov
14 // Distributed under the Boost Software License, Version 1.0.
15 // See accompanying file LICENSE_1_0.txt or copy at
16 // http://www.boost.org/LICENSE_1_0.txt
18 #include <boost/config.hpp>
26 #if !defined( BOOST_NO_CXX11_RVALUE_REFERENCES )
28 #if defined( BOOST_GCC ) && __GNUC__ * 100 + __GNUC_MINOR__ <= 404
30 // GCC 4.4 supports an outdated version of rvalue references and creates a copy of the forwarded object.
31 // This results in warnings 'returning reference to temporary'. Therefore we use a special version similar to std::forward.
32 template< class T > T&& sp_forward( T && t ) BOOST_NOEXCEPT
39 template< class T > T&& sp_forward( T & t ) BOOST_NOEXCEPT
41 return static_cast< T&& >( t );
52 #endif // #ifndef BOOST_SMART_PTR_DETAIL_SP_FORWARD_HPP_INCLUDED