Share struct property (owned) with childs through reference.

share_property_with_child.rs

use core::fmt::Debug;
use std::rc::Rc;

#[derive(Debug)]
struct Display;

impl Display {
    fn print<T: Debug>(&self, t: &T) {
        println!("> {:?}", t);
    }
}

#[derive(Debug)]
struct Window {
    d: Rc<Display>,
    id: u32,
}

impl Window {
    fn proc(&self) {
        self.d.print(self);
    }
}

struct Container {
    d: Rc<Display>,
    windows: Vec<Window>,
}
impl Container {
    fn add_window(&mut self) {
        let w = Window { d: Rc::clone(&self.d), id: 32 };
        self.windows.push(w);
    }
    
    fn proc(&self) {
        for w in self.windows.iter() {
            w.proc();
        }
    }
}

fn main() {
    let d = Display;
    
    let mut c = Container { windows: Vec::new(), d: Rc::new(d) };
    c.add_window();
    c.proc();
}