#include <iostream>
#include <vector>
#include <memory>

struct Test: std::vector<int> {
  Test(): std::vector<int>{1,2,3} {
    std::cout << __PRETTY_FUNCTION__ << '\n';
  }

  ~Test() {
    std::cout << __PRETTY_FUNCTION__ << '\n';
  }
};

Test func() {
  return Test();
}

int main() {
  for (const auto &obj: func()) {
    std::cout << obj << '\n';

  }
}