use std::vec::Vec;
use std::rc::{Weak,Rc};

struct Component{
	parent: Weak<Compound>,
	active_site: Option< Box< ActiveSite > >,
}

impl Component{
	fn update(&self){
		if self.active_site.is_some() {
			self.active_site.as_ref().unwrap().update(self);
		}
	}
}

trait ActiveSite{
	fn update( &self, root: &Component);
}

struct Compound{
	components: Vec< Rc< Component > >,
}

impl Compound{
	/// Moves component and bind it's as part of the compound.
	fn addComponent(&mut self, c: Component){
		self.components.push(Rc::new(c));
	}
	fn removeComponent(&mut self, c: &mut Component ){
		self.components.remove(0);
	}
}

#[test]
fn validate(){

}