0. (See accompanying
        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
      </p>
</div></div>
</div>
<hr>
</div>
<div class="toc">
<p><b>Table of Contents</b></p>
<dl class="toc">
<dt><span class="section"><a href="base_from_member.html#base_from_member.rationale">Rationale</a></span></dt>
<dt><span class="section"><a href="base_from_member.html#base_from_member.synopsis">Synopsis</a></span></dt>
<dt><span class="s