Chris@16: #ifndef BOOST_SMART_PTR_DETAIL_SP_FORWARD_HPP_INCLUDED
Chris@16: #define BOOST_SMART_PTR_DETAIL_SP_FORWARD_HPP_INCLUDED
Chris@16: 
Chris@16: // MS compatible compilers support #pragma once
Chris@16: 
Chris@16: #if defined(_MSC_VER) && (_MSC_VER >= 1020)
Chris@16: # pragma once
Chris@16: #endif
Chris@16: 
Chris@16: //  detail/sp_forward.hpp
Chris@16: //
Chris@16: //  Copyright 2008,2012 Peter Dimov
Chris@16: //
Chris@16: //  Distributed under the Boost Software License, Version 1.0.
Chris@16: //  See accompanying file LICENSE_1_0.txt or copy at
Chris@16: //  http://www.boost.org/LICENSE_1_0.txt
Chris@16: 
Chris@16: #include <boost/config.hpp>
Chris@16: 
Chris@16: namespace boost
Chris@16: {
Chris@16: 
Chris@16: namespace detail
Chris@16: {
Chris@16: 
Chris@16: #if !defined( BOOST_NO_CXX11_RVALUE_REFERENCES )
Chris@16: 
Chris@101: #if defined( BOOST_GCC ) && __GNUC__ * 100 + __GNUC_MINOR__ <= 404
Chris@101: 
Chris@101: // GCC 4.4 supports an outdated version of rvalue references and creates a copy of the forwarded object.
Chris@101: // This results in warnings 'returning reference to temporary'. Therefore we use a special version similar to std::forward.
Chris@101: template< class T > T&& sp_forward( T && t ) BOOST_NOEXCEPT
Chris@101: {
Chris@101:     return t;
Chris@101: }
Chris@101: 
Chris@101: #else
Chris@101: 
Chris@16: template< class T > T&& sp_forward( T & t ) BOOST_NOEXCEPT
Chris@16: {
Chris@16:     return static_cast< T&& >( t );
Chris@16: }
Chris@16: 
Chris@16: #endif
Chris@16: 
Chris@101: #endif
Chris@101: 
Chris@16: } // namespace detail
Chris@16: 
Chris@16: } // namespace boost
Chris@16: 
Chris@16: #endif  // #ifndef BOOST_SMART_PTR_DETAIL_SP_FORWARD_HPP_INCLUDED