><span class="special">,</span> <span class="identifier">rule</span><span class="special">&lt;</span><span class="identifier">output_iterator_type</span><span class="special">,</span> <span class="keyword">char</span><span class="special">()&gt;</span> <span class="special">&gt;</span> <span class="identifier">sym</span><span class="special">;</span>
<span class="identifier">sym</span><span class="special">.</span><span class="identifier">add</span>
    <span class="special">(</span><span class="char">'j'</