Simple URL thing

URL.h

#include <boost/regex.hpp>

#include <tuple>
#include <string>
#include <iostream>

// Simple URL 
// protocol, host, port, path, query
typedef std::tuple<std::string, std::string, int, std::string, std::string> URL;

// use them as accessors, not only getters;
auto protocol(const URL& url) -> std::string& { return std::get<0>(url); };
auto hostname(const URL& url) -> std::string& { return std::get<1>(url); };
auto port(const URL& url)     -> int&         { return std::get<2>(url); };
auto path(const URL& url)     -> std::string& { return std::get<3>(url); };
auto query(const URL& url)    -> std::string& { return std::get<4>(url); };

auto operator<<(std::ostream& os, const URL& url) -> std::ostream& {
  return os << "[" << protocol(url) << "://" << hostname(url) << ":" << port(url) << path(url) << "?" << query(url) << "]";
}

// needs works for more protocol and tests
auto parseURL(std::string url) -> URL {
  URL res;
  boost::regex ex("(http|https)://([^/ :]+):?([^/ ]*)(/?[^ #?]*)\\x3f?([^ #]*)#?([^ ]*)");
  boost::cmatch what;
  auto default_for_protocol = [](std::string proto) -> int {
    return 80;
  };
  if(regex_match(url.c_str(), what, ex)) {
    /*
    std::cout << "what: "
              << std::string(what[1].first, what[1].second) << " "
              << std::string(what[2].first, what[2].second) << " "
              << std::string(what[3].first, what[3].second) << " "
              << std::string(what[4].first, what[4].second) << " "
              << std::string(what[5].first, what[5].second) << std::endl;
    */
    std::string port = std::string(what[3].first, what[3].second);
    URL foo { std::string(what[1].first, what[1].second),
              std::string(what[2].first, what[2].second),
              port != "" ? std::stoi(port) : -1, // lexical_cast maybe
              std::string(what[4].first, what[4].second),
              std::string(what[5].first, what[5].second) };
    return foo;
  } else {
    throw std::invalid_argument("url not correctly formated");
  }
}

try to remove the need for boost::regex