#[derive(PartialEq)]
struct Actor {
    hp: i32,
    attacking: bool,
}

impl Actor {
    pub fn new() -> Actor {
        Actor {
            hp: 10,
            attacking: false,
        }
    }

    pub fn damage(&mut self) {
        self.hp -= 1;
    }
}

fn main() {
    let mut actors = vec![Actor::new(), Actor::new()];
    actors[1].attacking = true;

    for actor in actors.iter_mut() {
        //if an actor is attacking, damage all the other actors
        if actor.attacking {
            //doesnt compile due to two mut borrows
            for actor2 in actors.iter_mut() {
                if actor2 != actor {
                    actor2.damage();
                }
            }
        }
    }
}