On Oct 12, 2007, at 2:27 PM, Andrey Semashev wrote:
Hi,
I'm not sure I'm asking this question in the right list, so sorry if I've misplaced my post.
I'd like to ask if boost::addressof is going to be proposed to be included in the upcoming C++ Standard. And what is more important to me, will it solve the problem of storing objects with custom operator& in STL containers and acquiring their addresses with std::allocator<T>::address. I'm sure such discussion must have went in the Committee or in this list, I've found some traces of it in the GMANE archive but I couldn't find any conclusion.
As of last week, it looks like std::allocator<T>::address will supply the functionality of boost::addressof. This is LWG issue 634: http://www.open-std.org/jtc1/sc22/wg21/docs/lwg-active.html#634 The latest WP: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2369.pdf is currently lacking the restriction C++03 has concerning container::value_type's with overloaded operator&. That being said, the requirements on the value_type in the containers is still a topic under debate, so the current state of the WP should not be taken as the last word. I'm afraid my answer amounts to: we're seriously considering it; maybe. :-\ Perhaps I should turn this around and ask you a question: What motivating use cases (of yours) can I bring to the committee to affirm our current position that value_type's with overloaded operator& can be put into the standard containers? -Howard