implicit-vs-explicit.rs

use std::ops::DerefMut;

struct Foo {
    a: i32,
    b: bool,
}
fn foo(_: &mut i32, _: bool) {}

fn main() {
    let f = Foo { a: 42, b: true };
    let mut zed = std::boxed::Box::new(f);

    let xyz = &mut zed.deref_mut().a;
    //let xyz = &mut zed.a;

    foo(xyz, zed.b);
}