<?php
function main() {
  function f($x = Vector {}) {
    return $x;
  }
  $v1 = f();
  $v2 = f();
  $v1[] = 11;
  $v2[] = 22;
  $v2[] = 33;
  var_dump(count($v1), count($v2), ($v1 === $v2));

  echo "=========\n";

  function g() {
    static $x = Vector {};
    return $x;
  }
  $v1 = g();
  $v2 = g();
  $v1[] = 11;
  $v2[] = 22;
  $v2[] = 33;
  var_dump(count($v1), count($v2), ($v1 === $v2));

  echo "=========\n";

  class C {
    public $y = Vector {};
    static public $z = Vector {};
  }
  $obj1 = new C;
  $obj2 = new C;
  $v1 = $obj1->y;
  $v2 = $obj2->y;
  $v1[] = 11;
  $v2[] = 22;
  $v2[] = 33;
  var_dump(count($v1), count($v2), ($v1 === $v2));
  var_dump(get_class(C::$z));

  echo "=========\n";

  class V {
    public $x = array('a' => 1);
    public $y = Map {'a' => 1};
  }
  class W extends V {
    public $x = Map {'a' => 1};
    public $y = array('a' => 1);
  }
  $obj1 = new W;
  $obj2 = new W;
  var_dump($obj1->x === $obj2->x);
  $obj1->x['b'] = 11;
  $obj2->x['c'] = 22;
  $obj2->x['d'] = 33;
  var_dump(count($obj1->x), count($obj2->x), ($obj1->x === $obj2->x));

  echo "=========\n";

  var_dump($obj1->y === $obj2->y);
  $obj1->y['b'] = 11;
  $obj2->y['c'] = 22;
  $obj2->y['d'] = 33;
  var_dump(count($obj1->y), count($obj2->y), ($obj1->y === $obj2->y));

  echo "=========\n";

  class X {
    public $prop = array(Map {'a' => 1});
  }
  $obj1 = new X;
  $obj2 = new X;
  $obj1->prop[0]['a']++;
  var_dump($obj1->prop[0]['a']);
  var_dump($obj2->prop[0]['a']);
  class Y {
    public $prop = Vector {array(Map {'a' => 1})};
  }
  $obj1 = new Y;
  $obj2 = new Y;
  $obj1->prop[0][0]['a']++;
  var_dump($obj1->prop[0][0]['a']);
  var_dump($obj2->prop[0][0]['a']);

  echo "=========\n";

  define('FOO', 123);
  define('BAR', "blah");
  class Z {
    const FOO = 456;
    const BAR = "yo";
    public $prop = StableMap {FOO => BAR, Z::FOO => Z::BAR};
  }
  $obj1 = new Z;
  var_dump($obj1->prop[FOO], $obj1->prop[Z::FOO], count($obj1->prop));
  $obj2 = new Z;
  $obj1->prop[FOO] = 42;
  $obj1->prop[Z::FOO] = 73;
  var_dump($obj2->prop[FOO], $obj2->prop[Z::FOO]);

  echo "=========\n";

  class T {
    public $prop = array(Set {'a'});
  }
  $obj1 = new T;
  $obj2 = new T;
  $obj1->prop[0][] = 'b';
  var_dump($obj1->prop[0]->contains('b'));
  var_dump($obj2->prop[0]->contains('b'));
}
main();