shunsuke skrev:
Thorsten Ottosen wrote:
shunsuke skrev:
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. Why?
The rule seems complicated. :-( This is because it requires two user-defined conversions? generic_ptr_list -> operator auto_ptr() -> operator auto_ptr_ref() -> auto_ptr
In the case of lvalue: generic_ptr_list -> operator auto_ptr&() -> auto_ptr
I hope a lawyer will look into this posting. :-)
ME to. It's no secret that some compilers had problems with it, but if IIRC, comeau could do it. -Thorsten