html" title="Class template histogram">histogram</a><span class="special">&lt;</span> <span class="identifier">A</span><span class="special">,</span> <span class="identifier">S</span> <span class="special">&gt;</span> <span class="special">&amp;</span><span class="special">,</span> 
                     <span class="identifier">std</span><span class="special">::</span><span class="identifier">integral_constant</span><span class="special">&lt;</span> <span class="keyword">unsigned</span><span class="special"