C++, boost: which is fastest way to parse string like tcp://adr:port/ into address string and one int for port?

Question

we have std::string A with tcp://adr:port/ How to parse it into address std::string and one int for port?

Answer 1

void extract(std::string const& ip, std::string& address, std::string& service)
{
   boost::regex e("tcp://(.+):(\\d+)/");
   boost::smatch what;
   if(boost::regex_match(ip, what, e, boost::match_extra))
   {
     boost::smatch::iterator it = what.begin();
     ++it; // skip the first entry..
     address = *it;
     ++it;
     service = *it;
   }
}

EDIT: reason service is a string here is that you'll need it as a string for resolver! ;)