Automatic Inheritance by Deref

gistfile1.txt

use std::{sync::Arc, ops::Deref};

fn main() {
    listen(Arc::new(Foo));
}

fn listen<N: Noisy>(n: N) {
    n.noise();
}

trait Noisy {
    fn noise(&self);
}

impl<T> Noisy for T
where
    T: Deref,
    T::Target: Noisy,
{
    fn noise(&self) {
        self.deref().noise()
    }
}

struct Foo;
impl Noisy for Foo {
    fn noise(&self) {
        println!("foo");
    }
}