        <p>
                  <code class="computeroutput"><span class="special">&lt;&lt;</span></code>, <code class="computeroutput"><span class="special">&gt;&gt;</span></code>
                </p>
              </td>
<td>
                <p>
                  <code class="computeroutput"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">phoenix</span><span class="special">/</span><span cl