&amp;</span><span class="special">)</span><span class="special">;</span>

  <span class="comment">// <a class="link" href="basic_custom_mapping.html#idm46093045936544-bb">public member functions</a></span>
  <span class="identifier">mapped_type</span> <a class="link" href="basic_custom_mapping.html#idm46093045935984-bb"><span class="keyword">operator</span><span class="special">(</span><span class="special">)</span></a><span class="special">(</span><span class="identifier">record_view</span> <span class="ke