use std::ops::Deref;

struct MyBox<T>(T);

impl<T> MyBox<T> {

    fn new(x: T) -> MyBox<T> {
        MyBox(x)
    }
}

impl<T> Deref for MyBox<T> {
    type Target = T;
    fn deref(&self) -> &T {
        &self.
    }
}

fn hello(name: &str) {
    println!("Hello, {}!", name);
}

fn main() {
    let x = ;
    let y = MyBox::new(x);

    assert_eq!(, x);
    assert_eq!(, *y);

    let m = MyBox::new(String::from("Rust"));
    hello(&m);
}