ut_test_stream.html" title="Class output_test_stream">boost::test_tools::output_test_stream</a></code>
          to implement testing logic. It has two modes of operation:
        </p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
              save the pattern file (true).
            </li>
<li class="listitem">
              and match against a previously stored pattern file (false).
            </li>
</ul></div>
<p>
          Default mode is 'ma