There is a new edition of the book and this is an old link.
Implementing the
Dereftrait allows us to customize the behavior of the dereference operator*. By implementingDerefin such a way that a smart pointer can be treated like a regular reference, we can write code that operates on references and use that code with smart pointers too.
use std::ops::Deref;
impl<T> Deref for MyBox<T> {
type Target = T;
fn deref(&self) -> &T {
&self.0
}
}RunHere are the relevant sections in the new and old books: