John Maddock <john <at> johnmaddock.co.uk> writes:

izua wrote:

...

How can I do a regex search that will return me all patterns for the given regular expression? Somehow like preg_match_all in PHP.

Please see my previous reply: http://article.gmane.org/gmane.comp.lib.boost.user/29880

John.

Here is an example: #include <iterator> #include <boost/regex.hpp> #include <boost/bind.hpp> using namespace std; using namespace boost; vector<string> preg_match_all(const string & s, const regex & expr) { typedef regex_iterator<string::const_iterator> iter; vector<string> res; transform ( iter(s.begin(), s.end(), expr), iter(), back_inserter(res), bind(&iter::value_type::str, _1, 0) ); return res; } preg_match_all("abcd123.ef56\tessn", regex("[0-9]+?[\\W]+?")); Roman Perepelitsa.

izua wrote:

Thanks! This works, but it's not exactly what I want. The idea is to return all captures in all matches.

That's exactly what enumerating with regex_iterator gives you: everything else is just syntactic sugar storing the the results in an array or whatever. John.

izua wrote:

Hmm.. I've checked out the documentation, and the examples are really, really way out of my league. Is there a wrapper function or something like this around it? Or anyone has one handy? I'll really appreciate it.

See if you can understand this one then: void find_all(const std::string& s, const boost::regex& e) { boost::sregex_iterator i(s.begin(), s.end(), e), j; while(i != j) { for(unsigned s = 0; s <= i->size(); ++s) { std::cout << "Location of sub-expression " << s << " match is " << i->position(s) << std::endl; std::cout << "Length of sub-expression " << s << " match is " << i->length(s) << std::endl; std::cout << "Text of sub-expression " << s << " match is \"" << i->str(s) << "\"" << std::endl; } ++i; } } John.