span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span>

  <span class="comment">// <a class="link" href="memory_resource.html#idp39162496-bb">friend functions</a></span>
  <span class="keyword">friend</span> <span class="keyword">bool</span> <a class="link" href="memory_resource.html#idp39163056-bb"><span class="keyword">operator</span><span class="special">==</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href