extern crate sylasteven as engine;

use engine::{Change, Handler, Layer, System};

struct SystemEvent;

struct State;

impl<H: Handler> System<H> for State
where
    H::Event: From<SystemEvent>,
{
    fn process(&mut self, handler: &mut H) {
        handler.handle(SystemEvent.into());
    }
}

struct SimpleLayer;

impl<S, E> Layer<S, E> for SimpleLayer {
    fn update(&mut self, _state: &mut S, _event: &E) -> Change<S, E> {
        Change::remove()
    }
}

#[test]
fn main() {
    let state = State;
    let layers: Vec<Box<dyn Layer<_, _>>> = vec![Box::new(SimpleLayer)];
    engine::run::<_, SystemEvent>(state, layers);
}