nt">false_type</a>.
      </p>
<p>
        The default behaviour (<code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span></code>)
        is to not check for the return value of binary <code class="computeroutput"><span class="keyword">operator</span><span class="special">%=</span></code>. If <code class="computeroutput"><span class="identifier">Ret</span></code>
        is different from the default <code class="computeroutput"