inhzus

void split(const std::string &s,
           const std::string &delim,
           const std::function<void(const std::string &)> &f) {
  std::string::size_type m{}, n{};
  while (true) {
    n = s.find(delim, m);
    f(s.substr(m, n - m));
    if (n == std::string::npos) {
      break;
    }