#include <zip_longest.hpp>

#include <vector>

#include <string>

#include <iostream>

#include <array>

#include <boost/optional.hpp>

// prints Just VALUE or Nothing

template <typename T>

std::ostream & operator<<(std::ostream & out, const boost::optional<T>& opt) {

if (opt) {

out << "Just " << *opt;

} else {

out << "Nothing";

}

return out;

}

int main() {

std::vector<int> ivec = {1, 4, 9, 16, 25, 36};

std::vector<std::string> svec = {"hello", "good day", "goodbye"};

std::cout << "zipping a vector of strings with a vector of ints:\n";

for (auto&& e : iter::zip_longest(ivec, svec)) {

std::cout << '(' << std::get<0>(e) << ", "

<< std::get<1>(e) << ")\n";

}

}