unorder.cpp

//
// Created by light on 19-12-16.
//

#include "../container1/output_container.h"
#include <complex>       // std::complex
#include <iostream>      // std::cout/endl
#include <unordered_map> // std::unordered_map
#include <unordered_set> // std::unordered_set

using namespace std;

namespace std {

template <typename T> struct hash<complex<T>> {
  size_t operator()(const complex<T> &v) const noexcept {
    hash<T> h;
    return h(v.real()) + h(v.imag());
  }
};

} // namespace std

int main() {
  unordered_set<int> s{1, 1, 2, 3, 5, 8, 13, 21};
  cout << s << endl;

  unordered_map<complex<double>, double> umc{{{1.0, 1.0}, 1.4142},
                                             {{3.0, 4.0}, 5.0}};
  cout << umc << endl;
}