Тема9 Урок 5 6/6 универсальный вывод контейнеров

#include <iostream>
#include <vector>
#include <set>
#include <map>
using namespace std;

template <typename print>
ostream& Print(ostream& out, const print& container){
    bool isfirst=1;
    for (const auto& element : container) {
    if (isfirst)  out << ""s;
    else out << ", "s;
    isfirst=0;
    out << element << ""s;
    }
  return out;
}

template <typename invect>
ostream& operator<<(ostream& out, const vector<invect>& container) {
out<<"[";
Print(out, container);
out<<"]";
return out;
}

template <typename inset>
ostream& operator<<(ostream& out, const set<inset>& container) {
out<<"{";
Print(out, container);
out<<"}";
    return out;
}

template <typename Key, typename Value>
ostream& operator<<(ostream& out, const map<Key, Value>& container) {
out<<"<";
bool isfirst=1;
for (const auto& [key, value] : container){
    if (isfirst)  out << ""s;
    else out << ", "s;
    isfirst=0;
out<<"("<<key<<", "<<value<<")";
}
out<<">";
    return out;
}

int main() {
    const set<string> cats = {"Мурка"s, "Белка"s, "Георгий"s, "Рюрик"s};
cout << cats << endl;
const vector<int> ages = {10, 5, 2, 12};
cout << ages << endl;
const map<string, int> cat_ages = {
    {"Мурка"s, 10},
    {"Белка"s, 5},
    {"Георгий"s, 2},
    {"Рюрик"s, 12}
};
cout << cat_ages << endl;
    return 0;
}