s="identifier">double_</span><span class="special">);</span>
</pre>
<h6>
<a name="spirit.qi.tutorials.roman_numerals.h2"></a>
          <span class="phrase"><a name="spirit.qi.tutorials.roman_numerals.grammars"></a></span><a class="link" href="roman_numerals.html#spirit.qi.tutorials.roman_numerals.grammars">Grammars</a>
        </h6>
<p>
          A grammar encapsulates one or more rules. It has the same template parameters
          as the rule. You declare a grammar by:
        </p>
<div class="orderedlis