boost</span><span class="special">::</span><span class="identifier">spirit</span></code>.
            Please note that all existing placeholders for your convenience are also
            available from the namespace <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">spirit</span><span class="special">::</span><span class="identifier">qi</span></code>.
          </p>
</td></tr>
</table></div>
</div>
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