#include
#include
#include
#include
#include
#include
// prints Just VALUE or Nothing
template
std::ostream & operator<<(std::ostream & out, const boost::optional& opt) {
if (opt) {
out << "Just " << *opt;
} else {
out << "Nothing";
}
return out;
}
int main() {
std::vector ivec = {1, 4, 9, 16, 25, 36};
std::vector<: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";
}
}