#![feature(box_syntax)]

trait Blorpable: std::fmt::Debug {
    fn blorp(&self, n: i32) -> i32;
}

#[derive(Debug, Clone)]
struct BlorpAdd(i32);

impl Blorpable for BlorpAdd {
    fn blorp(&self, n: i32) -> i32 {
        self.0 + n
    }
}

#[derive(Debug, Clone)]
struct BlorpSub(i32);

impl Blorpable for BlorpSub {
    fn blorp(&self, n: i32) -> i32 {
        self.0 - n
    }
}

#[derive(Debug, Clone)]
struct Blorper<T: Blorpable + Clone>(Vec<Box<T>>);

impl<T: Blorpable + Clone> Blorper<T> {
    fn blorp_all(&self, n: i32) -> i32 {
        self.0.iter().fold(n, |acc, blp| blp.blorp(acc))
    }
}

impl<T: Blorpable + Clone> Blorpable for Blorper<T> {
    fn blorp(&self, n: i32) -> i32 {
        self.blorp_all(n)
    }
}

fn main() {
    let blorper = Blorper(vec![
        box BlorpAdd(2),
        box Blorper(vec![
            box BlorpAdd(6),
            box BlorpSub(2),
        ]),
        box BlorpSub(3),
    ]);

    println!("{}", blorper.blorp(10))
}