Function for_each_pair

src/include/str_map.h:28–42

template <typename Func>
void for_each_pair(std::string_view s, const char* delims, Func&& f)
{
  auto pos = s.find_first_not_of(delims);
  while (pos != s.npos) {
    s.remove_prefix(pos); // trim delims from the front
    auto end = s.find_first_of(delims);
    auto kv = s.substr(0, end);
    if (auto equal = kv.find('='); equal != kv.npos) {
      f(kv.substr(0, equal), kv.substr(equal + 1));
    } else {
      f(kv.substr(0, equal), std::string_view());
    }
    pos = s.find_first_not_of(delims, end);
  }
}

using str_map_t = std::map<std::string,std::string>;