Function MatchFixedOffset

python/pyarrow/src/arrow/python/datetime.cc:46–53

namespace {

bool MatchFixedOffset(const std::string& tz, std::string_view* sign,
                      std::string_view* hour, std::string_view* minute) {
  static const std::regex regex("^([+-])(0[0-9]|1[0-9]|2[0-3]):([0-5][0-9])$");
  if (tz.size() < 5) {
    return false;
  }
  return RegexMatch(regex, tz, {sign, hour, minute});
}

constexpr char* NonConst(const char* st) {
  // Hack for python versions < 3.7 where members of PyStruct members