use time

-- iteration 24 T5: a timer is a MESSAGE. time.after arms a one-shot on
-- this shard; the target receives it like any send. ms <= 0 delivers now.
class Tick {
  tag: Text
}

class Sink {
  pad: Int
  fn receive(msg: Tick) {
    print("tick: ${msg.tag}");
  }
}

fn main() -> Int {
  let a: actor Tick = spawn Sink { pad: 0 };
  time.after(30, a, Tick { tag: "armed" });
  time.after(0, a, Tick { tag: "now" });
  time.sleep(150);
  print("done");
  return 0;
}