// Dummy for what's already in events system
struct Event {}

impl Event {
    fn event() {
        println!("Event")
    }

    fn anti_event() {
        println!("Anti-Event")
    }
}

// Suggested new struct in events infra
struct Gauge {}

impl Gauge {
	fn new() -> Gauge {
		Event::event();
		Gauge {}
	}
}

impl Drop for Gauge {
	fn drop(&mut self) {
		Event::anti_event();
	}
}

impl Clone for Gauge {
    fn clone(&self) -> Gauge {
		Event::event();
		Gauge {}
    }
}

// Test code: a control block and its usage
#[derive(Clone)]
struct CB {
	gauge: Gauge,
}

impl CB {
    fn new() -> CB {
        CB { gauge: Gauge::new() }
    }
}

fn main() {
    let cb = CB::new();
    let _cb2 = cb.clone();
}