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copied!<p>The standard was finalized in 1998 with fixes in 2003, whereas <code>boost::addressof</code> <a href="http://boost.cvs.sourceforge.net/viewvc/boost/boost/libs/utility/utility.htm?view=log" rel="nofollow noreferrer">dates to</a> early 2002.</p> <p>Moreover, it's not clear that <code>addressof</code> is the answer. Overloads of <code>operator&()</code> indicate that raw pointers are supposed to be avoided. The <code>Allocator::address</code> member provides the best interface to get from <code>Allocator::reference</code> to <code>Allocator::pointer</code>, so in general theory, you should be able to effectively <em>introduce</em> an <code>operator&</code> override to an otherwise well-behaved class with a custom allocator.</p> <p>Considering that references do almost everything that pointers do, and the Allocator interface abstracts everything else, there should be no need for raw pointers.</p> <p>Convenience to the library implementers should not be an issue. The ill-defined semantics of <code>Allocator::pointer</code> are a problem, and what I've read so far in C++0x doesn't clear that up.</p> <p>C++0x removes any mention of <code>operator&</code> from CopyConstructible, and furthermore doesn't require anything-Constructible for container arguments at all — the user can stick to <code>emplace</code>. Even <code>vector</code> only requires Destructible, although I suppose actually using <code>insert</code> or <code>erase</code> would require more.</p> <p>(Note that, in the strictest reading, overloads are not forbidden in C++03. You are just not allowed to change the value or type of the builtin.)</p>

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