My goal is to create a URL query params from std::map<std::string, std::string>. For example, we call to_query_params( {{one,1},{two,2}} ) and we get ?one=1&two=2.Is this a good way of doing it?std::string to_query_params(std::map<std::string, std::string> map){    if (map.empty()){        return ;    }    auto map_beg = std::begin(map);    auto concat = [](const decltype(map)::value_type& a){                        return a.first+=+a.second;                    };    std::string result(?+concat(*map_beg));    std::for_each(std::next(std::begin(map)),                   std::end(map),                   [&](decltype(map)::value_type param){                       result+=&+concat(param);                   });    return result;}
URL Query params builder
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