ss="identifier">parameter</span><span class="special">::</span><span class="identifier">keyword</span><span class="special">&lt;</span> <span class="identifier">tag</span><span class="special">::</span><span class="identifier">rolling_window_size</span> <span class="special">&gt;</span> <span class="keyword">const</span> <span class="identifier">window_size</span><span class="special">;</span>  <span class="comment">// tag::rolling_window::size named parameter </span>
<span class="special">}</span><span cla