#[derive(Eq)]
struct A {
  a: i64
}

impl PartialEq for A {
    #[inline]
    fn eq(&self, other: &Self) -> bool {
        self.a.eq(&other.a)
    }
}

type Fn = fn(&[A]);

fn my_fn(args: &[A]) {
  println!("hello world");
}

const TEST: Fn = my_fn;

struct B(Fn);

fn main() {
  let s = B(my_fn);
  match s {
    B(TEST) => println!("matched"),
    _ => println!("didn't match")
  };
}