le_declarations">Rule
        Declarations</a>
      </h5>
<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">quoted_string_class</span><span class="special">;</span>
<span class="keyword">struct</span> <span class="identifier">person_class</span><span class="special">;</span>
<span class="keyword">struct</span> <span class="identifier">employee_class</span><span class="special">;</span>

<span class="identifier">x3</span><span class="special">::</span><span class="iden