boostorg/smart_ptr
1
0
Fork 1
mirror of https://github.com/boostorg/smart_ptr.git synced 2025-07-29 20:37:13 +02:00
Code Issues Packages Projects Releases Wiki Activity

Fix warnings on gcc 4.4

Browse Source 
Added a special version of sp_forward for an outdated version of rvalue references supported by gcc 4.4. The compiler would create a temporary and return an rvalue reference to it in the original code. This resulted in warnings about 'returning reference to temporary'.

The added version is similar to std::forward on that compiler, except it doesn't prohibit template argument deduction (which is in line with the original sp_forward).
This commit is contained in:
Andrey Semashev
2014-07-14 22:33:16 +04:00
parent bf3e9cc7af
commit b1beb11a45
1 changed files with 13 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

13
include/boost/smart_ptr/detail/sp_forward.hpp
View File

@ -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// GCC 4.4 supports an outdated version of rvalue references and creates a copy of the forwarded object.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