er">counter</span>
<span class="special">{</span>
    <span class="comment">// the function operator gets called for each of the matched tokens</span>
    <span class="comment">// c, l, w are references to the counters used to keep track of the numbers</span>
    <span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">Token</span><span class="special">&gt;</span>
    <span class="keyword">bool</span> <span class="keyword">operator