on_std_strings/icu/unicode_types.html">Unicode
          regular expression types</a></span></dt>
<dt><span class="section"><a href="boost_regex/ref/non_std_strings/icu/unicode_algo.html">Unicode
          Regular Expression Algorithms</a></span></dt>
<dt><span class="section"><a href="boost_regex/ref/non_std_strings/icu/unicode_iter.html">Unicode
          Aware Regex Iterators</a></span></dt>
</dl></dd>
<dt><span class="section"><a href="boost_regex/ref/non_std_strings/mfc_strings.html">Using
        Boos