// In header: <boost/program_options/parsers.hpp>


template<typename charT> 
  basic_parsed_options< charT > 
  parse_command_line(int argc, const charT *const argv, 
                     const options_description &, int style = 0, 
                     function1< std::pair< std::string, std::string >, const std::string & > ext = ext_parser());