[Boost-users] help with boost::bind and boost::regex

I am trying to do the following: std::vector< std::string > filenames; //list of filenames retrieved using filesystem boost::regex r(".*txt$"); std::vector< std::string >::const_iterator iter = std::find_if( filenames.begin(), filenames.end(), boost::bind(boost::regex_match, _1, r) ); //Doesn't compile. I'm trying to find strings that match (or don't match) a particular regular expression. Help in properly using boost::bind and negating it would be helpful. thanks, matthew