s="keyword">template</span> <span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">Seq</span><span class="special">&gt;</span>
    <span class="keyword">void</span> <span class="keyword">operator</span><span class="special">()(</span><span class="identifier">Seq</span> <span class="keyword">const</span> <span class="special">&amp;</span> <span class="identifier">s</span><span class="special">)</span> <span class="keyword">const</span>
    <span class="special">{</span>
