recur.rs

#[derive(Debug)]
struct Recur(u32);

impl Recur {
    pub fn call(n: u32) -> u32 {
        let r = Recur(n);
        let r = r.recur();
        r.0
    }
    
    fn recur(mut self) -> Self {
        println!("{:?}", self);
        if self.0 == 0 {
            self
        } else {
            self.0 -= 1;
            self.recur()
        }
    }
}

fn main() {
    Recur::call(10);
}