><span class="identifier">h</span><span class="special">,</span><span class="identifier">v</span><span class="special">};</span></code>
                </p>
              </td>
<td>
              </td>
<td>
                <p>
                  Constructible from <code class="computeroutput"><span class="identifier">h</span></code>
                  and <code class="computeroutput"><span class="identifier">v</span></code>. The lifetime
                  of <code class="computeroutput"><span class="identifie