 to determine whether a type has a public <code class="computeroutput"><span class="keyword">operator</span><span class="special">/=</span></code>
            or not.
<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">A</span> <span class="special">{</span> <span class="keyword">private</span><span class="special">:</span> <span class="keyword">void</span> <span class="keyword">operator</span><span class="special">/=(</span><span class="keyword">const</span> <span class