   </p>
                  </td>
<td>
                    <p>
                      Extract an instance of <code class="computeroutput"><span class="identifier">T</span></code>
                      from <code class="computeroutput"><span class="identifier">attr</span></code>,
                      and invoke the subject generator <code class="computeroutput"><span class="identifier">a</span></code>,
                      supplying the unnamed temporary as it's attribute.
                    </p>
           