#include <functional>
#include <memory>
#include <stdio.h>

struct Buka {
  int x;
};

void print_buka(std::shared_ptr<Buka> buka, int y) {
  printf("&buka=%p uc=%lu\n", buka.get(), buka.use_count());
  printf("buka.x=%d; y=%d\n", buka->x, y);
}

std::function<void()> close_it() {
  std::shared_ptr<Buka> buka;
  buka.reset(new Buka());
  buka->x = 123;
  std::function<void()> clos = [buka] {
    print_buka(buka, 456);
  };
  return clos;
}

int main() {
  auto clos = close_it();
  clos();
}