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Revert "Revert "Fix warnings on gcc 4.4""

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This reverts commit d28b0d07fc.
This commit is contained in:
Peter Dimov
2014-08-08 16:02:08 +03:00
parent 0bab2cc658
commit 59ac922a1c
1 changed files with 13 additions and 0 deletions
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13
include/boost/smart_ptr/detail/sp_forward.hpp
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@ -25,6 +25,17 @@ namespace detail
#if !defined( BOOST_NO_CXX11_RVALUE_REFERENCES )
#if defined( __GNUC__ ) && __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// GCC 4.4 supports an outdated version of rvalue references and creates a copy of the forwarded object.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 );
@ -32,6 +43,8 @@ template< class T > T&& sp_forward( T & t ) BOOST_NOEXCEPT
#endif
#endif
} // namespace detail
} // namespace boost