n class="identifier">BOOST_</span><span class="special">&lt;</span><span class="identifier">level</span><span class="special">&gt;</span><span class="identifier">_GE</span></code></a> for instance)
            </li>
<li class="listitem">
              when the type being compared does not implement a suitable <code class="computeroutput"><span class="keyword">operator</span> <span class="special">&lt;&lt;</span></code>
              for streaming out the value into the test log stream
            </li>
</ul