Function StringSplit2Set

src/pstd/src/pstd_string.cc:600–610

}

void StringSplit2Set(const std::string& s, char delim, std::unordered_set<std::string>& elems) {
  elems.clear();
  std::stringstream ss(s);
  std::string item;
  while (std::getline(ss, item, delim)) {
    item = pstd::StringTrim(item);
    if (!item.empty()) {
      elems.emplace(item);
    }
  }
}

std::string Set2String(const std::unordered_set<std::string>& elems, char delim) {
  std::string value;