https://svn.boost.org/trac10/ticket/12966 <blockquote> <p> boost::regex myRegex{ "<a class="missing wiki">:xdigit:</a>{ 1,2 }" };<em> string s = "\xca\xd5"; </em></p> </blockquote> <blockquote> <p> cout &lt;&lt; boost::regex_match(s,myRegex) &lt;&lt; endl; </p> </blockquote> en-us /htdocs/site/boost.png https://svn.boost.org/trac10/ticket/12966 Trac 1.4.3 John Maddock Sun, 16 Apr 2017 08:53:45 GMT https://svn.boost.org/trac10/ticket/12966#comment:1 https://svn.boost.org/trac10/ticket/12966#comment:1 <ul> <li><strong>status</strong> <span class="trac-field-old">new</span> → <span class="trac-field-new">closed</span> </li> <li><strong>resolution</strong> → <span class="trac-field-new">duplicate</span> </li> </ul> Ticket