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From: Howard Hinnant (hinnant_at_[hidden])
Date: 2007-10-13 10:08:22

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
> 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:

The latest WP:

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?


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