[Boost-bugs] [Boost C++ Libraries] #8055: Including boost/smart_ptr/shared_ptr.hpp produces warnings on clang with libc++

Subject: [Boost-bugs] [Boost C++ Libraries] #8055: Including boost/smart_ptr/shared_ptr.hpp produces warnings on clang with libc++
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2013-02-13 16:03:14

#8055: Including boost/smart_ptr/shared_ptr.hpp produces warnings on clang with
libc++
-------------------------------------+--------------------------------------
 Reporter:  michel                   |       Owner:  pdimov   
     Type:  Bugs                     |      Status:  new      
Milestone:  To Be Determined         |   Component:  smart_ptr
  Version:  Boost Development Trunk  |    Severity:  Problem  
 Keywords:                           |  
-------------------------------------+--------------------------------------
 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.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/8055>
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