[boost] [assign] ptr_list_of legal?

Hi, I found a snippet from <boost/assign/ptr_list_of.hpp>: template< class T > class generic_ptr_list { // ... public: template< class PtrContainer > operator std::auto_ptr<PtrContainer>() const { .. } }; IIRC, this automatic conversion doesn't work on any conforming compiler. The right way seems to make lvalue: 'operator std::auto_ptr<PtrContainer> & () const'. Regards, -- Shunsuke Sogame