an><span class="special">[</span><span class="identifier">a</span><span class="special">]</span></code>
                    </p>
                  </td>
<td>
                    <p>
                      The embedded generator <code class="computeroutput"><span class="identifier">a</span></code>
                      is invoked but its output is temporarily intercepted and stored
                      in an internal buffer. If <code class="computeroutput"><span class="identifier">a</span></code>
           