/* 
 * Zombie Iterator
 *
 * Vector going out of scope leaving zombie Iterator
 * Is this a dangling pointer?
 */

#include <vector>
#include <iostream>

int main() {
  // these are in the scope of main()
  std::vector<int>::iterator it;
  std::vector<int>::iterator end;
 
  if ( true ) {
    // now we are in the scope of this block, lets cause trouble
    // this vector only exists for this block... then it's gone
    std::vector<int> v;

    // fill the vector with 10 integers
    for ( int i = 10 ; i > 0 ; i-- ) {
      v.push_back(i);
    }

    // get our iterators (one at the beginning, the other at the end
    it = v.begin();
    end = v.end();

    std::cout << "iterator while vector alive: " << *it << '\n';    
  }

  // The vector (v) is now gone... the following would be a compile time error
  // v.pop_back();

  // But this is not a compile time error... 
  for ( ; it != end ; it++ ) {
    std::cout << "iterating over dead vector: " << *it << std::endl; // naughty
    *it = 0; // very naughty
  }
}