an class="special">,</span> <span class="identifier">attr</span><span class="special">);</span></code>
        </p>
<p>
          This simple no-frills protocol is one of the reasons why <a href="http://boost-spirit.com" target="_top">Spirit</a>
          is fast. If you know the internals of <a href="../../../../../../../libs/spirit/classic/index.html" target="_top"><span class="emphasis"><em>Spirit.Classic</em></span></a>
          and perhaps even wrote some parsers with it, this simple <a href="http://b