std::regex error_brack

[ledaker]

Hi folks,

I have error_brack error when i execute the below code in Code::Blocks 13.12

                 try
                 {
                      std::string seq = "ollo hello wallo ";
                      std::regex rgx(" ([a-z]+) ", std::regex_constants::ECMAScript);
                      std::smatch m;
                      std::regex_match(seq, m, rgx);
                      std::cout << m.size() << std::endl;
                      for(size_t i=0; i<m.size(); ++i)
                      {
                          std::cout << i << std::endl;
                          std::cout << m[i] << std::endl;
                      }
                 }
                 catch (std::regex_error& e)
                 {
                    if (e.code() == std::regex_constants::error_badrepeat)
                       std::cerr << "Repeat was not preceded by a valid regular expression.\n";
                    if (e.code() == std::regex_constants::error_range)
                       std::cerr << "error_range.\n";
                    if (e.code() == std::regex_constants::error_collate)
                       std::cerr << "error_collate.\n";
                    if (e.code() == std::regex_constants::error_ctype)
                       std::cerr << "error_ctype.\n";
                    if (e.code() == std::regex_constants::error_escape)
                       std::cerr << "error_escape.\n";
                    if (e.code() == std::regex_constants::error_backref)
                       std::cerr << "error_backref.\n";
                    if (e.code() == std::regex_constants::error_brack)
                       std::cerr << "error_brack.\n";
                    if (e.code() == std::regex_constants::error_paren)
                       std::cerr << "error_paren.\n";
                  }