orT</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">type</span> 
    <a class="link" href="record.html#idm23112-bb"><span class="keyword">operator</span><span class="special">[</span><span class="special">]</span></a><span class="special">(</span><span class="identifier">expressions</span><span class="special">::</span><span class="identifier">attribute_keyword</span><span class="special">&lt;</span> <span class="identifier">DescriptorT</span><span class="spec