ST</span></code>
        macro let you override the default message by the use of a second argument,
        as shown on the following example.
      </p>
<h6>
<a name="boost_test.testing_tools.reports.h4"></a>
        <span class="phrase"><a name="boost_test.testing_tools.reports.example_descr0"></a></span><a class="link" href="reports.html#boost_test.testing_tools.reports.example_descr0">Example:
        BOOST_TEST optional failure message</a>
      </h6>
<div class="informaltable"><table class="table">
<