Hallo Group Members. in http://www.boost.org/doc/libs/1_44_0/doc/html/string_algo/concept.html I can read: * Function Finder. Finder can be any function object. That is, any ordinary function with the required signature can be used as well. However, such a function can be used only for a specific iterator type. boost::iterator_range<std::string> simple_finder( std::string::const_iterator Begin, std::string::const_iterator End ) { return boost::make_range( Begin, End ); } but following code does not compile: #include <iostream> #include <string> #include <boost/algorithm/string.hpp> #include <boost/range.hpp> int main(int argc, char *argv[]) { boost::iterator_range<std::string> dd; return 0; } As I understand, I need to put iterator as template parameter to iterator_range, thus: #include <iostream> #include <string> #include <boost/algorithm/string.hpp> #include <boost/range.hpp> /* boost::iterator_range<std::string> simple_finder( std::string::const_iterator Begin, std::string::const_iterator End ) { return boost::make_range( Begin, End ); } */ int main(int argc, char *argv[]) { boost::iterator_range<std::string::iterator> dd; return 0; } compiles ok. Is it documentation bug? best regards, Pawel