#include <cstdlib>   // for EXIT_SUCCESS
#include <iostream>  // for std::cout, std::endl
#include <memory>    // for std::unique_ptr
#include <vector>    // for std::vector

using std::cout;
using std::endl;
using std::move;
using std::unique_ptr;
using std::vector;

int main(int argc, char **argv) {
  vector<unique_ptr<int> > vec;

  vec.push_back(unique_ptr<int>(new int(9)));
  vec.push_back(unique_ptr<int>(new int(5)));
  vec.push_back(unique_ptr<int>(new int(7)));

  // z is (a copy of) the (int pointed to by
  // the unique_ptr in vec[1])
  int z = *vec[1];
  cout << "z is: " << z << endl;

  // compiler error, since unique_ptrs can't be copied
  unique_ptr<int> copied = vec[1];

  // works, but now vec[1] has a null pointer.
  unique_ptr<int> moved = move(vec[1]);
  cout << "*moved: " << *moved << endl;
  cout << "vec[1].get(): " << vec[1].get() << endl;

  return EXIT_SUCCESS;
}