use std::any::Any;
use std::fmt::Debug;

use std::mem::size_of_val;

fn main() {
    const n: i32 = 35;
    let to: &'static dyn Debug = &n;
    let any: &Any = &to;
    if let Some(to2) = any.downcast_ref::<&dyn Debug>() {
        println!("{:?}", to2);
        println!(
            "size of n is {}, size of to2 is {}",
            size_of_val(&n),
            size_of_val(&to2)
        );
    } else {
        println!("Nope");
    }
}