escape</a>
      </h6>
<p>
        Any other escape sequence matches the character that is escaped, for example
        \@ matches a literal '@'.
      </p>
<h5>
<a name="boost_regex.syntax.basic_extended.h26"></a>
        <span class="phrase"><a name="boost_regex.syntax.basic_extended.operator_precedence"></a></span><a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.operator_precedence">Operator
        precedence</a>
      </h5>
<p>
        The order of precedence for of operators