#![feature(nll)]
#![allow(dead_code)]

struct List {
    next: Option<Box<List>>,
}

impl List {
    fn walk_the_list(&self) {
        let mut current = self;
        while let Some(inner) = &current.next {
            current = inner;
        }
    }

    fn consume_the_list(self) {
        self.walk_the_list();
    }
}

fn main() {}