nested for -- regex

FGFS · 2013-09-19T04:56:55

Hi Little confused. How to most simple output all matches. For ex. .m_airport_map contains LSZA, LSZB, LSZH and many more. Now I want to show by giving L as name all starting with L, giving LS all starting with LS etc. Many thanks for (auto it = test.m_airport_map.begin(); it != test.m_airport_map.end(); it++) { auto mapEntry = (*it); // std::cout << mapEntry.first << std::endl; std::smatch m; std::regex e ("(name.c_str())(.*)"); std::regex_match ( mapEntry.first, m, e ); std::cout << "matches:" << std::endl; for (std::smatch::iterator it = m.begin(); it!=m.end(); ++it) { std::cout << *it << std::endl; } }

For Beginners

Started by FGFS September 16, 2013 07:36 AM

12 comments, last by FGFS 10 years, 7 months ago

Brother Bob

10,350

September 18, 2013 10:14 AM

something alike:

std::regex e ("("name.c_str()")(.*)");

is wrong. any ideas?

fastcall22 has addressed that issue above already, with example code of what is wrong and how to make it work.

FGFS

345

Author

September 18, 2013 10:53 AM

Again, I want to list all beginning with the string "name".

Something alike:

std::regex e ("^"name);

is wrong. Moderators, if it's that easy, why don't you give the correct code and not some unusable handicrafts?

Brother Bob

10,350

September 18, 2013 10:58 AM

But you have been given the correct solution already; see fastcall22's post above. If you don't understand it, then ask for clarification and we may answer to help you learn why and how it works, but spoon feeding a solution is not helping anyone.