-- pub(read) golden: the declaring class writes (its own instance AND a
-- sibling instance — class-owned, not instance-owned), everyone reads.

class Counter {
  pub(read) count: Int

  fn bump() {
    self.count = self.count + 1;
  }

  fn reset(mut other: Counter) {
    other.count = 0;
  }
}

fn main() -> Int {
  let a = Counter { count: 0 };
  let b = Counter { count: 5 };
  a.bump();
  a.bump();
  print("a=${a.count} b=${b.count}");
  a.reset(b);
  print("after reset b=${b.count}");
  if a.count != 2 { return 1; }
  if b.count != 0 { return 1; }
  return 0;
}