https://svn.boost.org/trac10/ticket/3158 <p> I'm using g++ 4.3.2 in Linux. <code>is_iless' throws a </code>std::bad_cast' exception: </p> <pre class="wiki">#include &lt;string&gt; #include "/tmp/testsvn/boost/algorithm/string/compare.hpp" int main() { boost::algorithm::is_less()(std::string("a"), std::string("b")); // this is ok boost::algorithm::is_iless()(std::string("a"), std::string("b")); // this throws `std::bad_cast' return 0; } </pre><p> I assume I using <code>is_iless' correctly since </code>is_less' gives me a correct return value. </p> en-us /htdocs/site/boost.png https://svn.boost.org/trac10/ticket/3158 Trac 1.4.3 Pavol Droba Tue, 09 Jun 2009 20:41:47 GMT https://svn.boost.org/trac10/ticket/3158#comment:1 https://svn.boost.org/trac10/ticket/3158#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">invalid</span> </li> </ul> <p> is_iless was never intended nor designed to compare strings. its function is to compare characters. It uses C++ locale facet to convert the case of the input and that facet is obviously not specialized for std::string. </p> <p> use boost::ilexicographical_compare instead. </p> Ticket anonymous Fri, 03 Jan 2014 11:56:21 GMT