id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
8055	Including boost/smart_ptr/shared_ptr.hpp produces warnings on clang with libc++	Michel Morin	Peter Dimov	"On clang with libc++ in a C++03 mode, including 
`boost/smart_ptr/shared_ptr.hpp` produces warnings. 
Here is a test case
{{{
#include <boost/smart_ptr/shared_ptr.hpp>
int main(int argc, char* argv[]) { return 0; }
}}}
and warnings
{{{
boost/smart_ptr/shared_ptr.hpp:491:41: 
warning: rvalue references are a C++11 extension [-Wc++11-extensions]
    shared_ptr( std::unique_ptr< Y, D > && r ): px( r.get() ), pn()
                                        ^
boost/smart_ptr/shared_ptr.hpp:556:51: 
warning: rvalue references are a C++11 extension [-Wc++11-extensions]
    shared_ptr & operator=( std::unique_ptr<Y, D> && r )
                                                  ^
boost/smart_ptr/shared_ptr.hpp:558:55: 
warning: rvalue references are a C++11 extension [-Wc++11-extensions]
        this_type( static_cast< std::unique_ptr<Y, D> && >( r ) ).swap(*this);
                                                      ^
}}}

This is because `!defined(BOOST_NO_CXX11_SMART_PTR)` does not imply
`!defined(BOOST_NO_CXX11_RVALUE_REFERENCES)` in this configuration. 

It would be nice to remove warnings by adding 
`!defined(BOOST_NO_CXX11_RVALUE_REFERENCES)` guard. 
"	Bugs	closed	To Be Determined	smart_ptr	Boost Development Trunk	Problem	fixed