4>
<p>
      The boost/spirit directory currently holds two versions of the Spirit library:
      <a href="../../../../../libs/spirit/classic/index.html" target="_top"><span class="emphasis"><em>Spirit.Classic</em></span></a>
      (former V1.8.x) and SpiritV2. Both are completely independent and usually not
      used at the same time. Do not mix these two in the same grammar.
    </p>
<p>
      <a href="../../../../../libs/spirit/classic/index.html" target="_top"><span class="emphasis"><em>Spirit.Classic<