an class="n">x</span><span class="p">,</span> <span class="n">U</span> <span class="n">y</span><span class="p">)</span> <span class="k">const</span>
    <span class="p">{</span>
        <span class="k">return</span> <span class="n">x</span> <span class="o">&gt;</span> <span class="n">y</span> <span class="o">?</span> <span class="nl">x</span> <span class="p">:</span> <span class="n">y</span><span class="p">;</span>
    <span class="p">}</span>
<span class="p">};</span>
<span class="kt">int</span> <span clas