better.rs

use std::rc::Rc;

trait Art<T, A: Adapton> {}

struct Location;

impl<T, A: Adapton> Art<T, A> for Location { }

trait Adapton {
	fn put<T>(obj: T) -> Rc<Art<T, Self>>;
}

struct Engine;

impl Adapton for Engine {
	fn put<T>(obj: T) -> Rc<Art<T, Engine>> {
		Rc::new(Location)
	}
}

fn main() { }