2009/2/18 Mathias Gaunard <mathias.gaunard@ens-lyon.org>
Christian Holmquist wrote :
I think the doc_file_descriptor example should show how to create an object directly in the vector<file_descriptor> using emplace functions, as boost::move can't detect true rvalues as in c+0x.
boost::interprocess::vector<file_descriptor> v; v.push_back(file_descriptor("filename")); // <- Fails
Why does it fail? I thought rvalues were properly detected.
The chosen overload is void vector<T>::push_back(const T& x), I don't think it's possible to detect a difference between foo(T()) -> const T& const T x; foo(x); -> const T& and one don't want to automatically be able to move const&. The following works, although a bit verbose v.push_back(const_cast<file_descriptor&>(file_descriptor(""))); / Christian