vsinder.rs

#[derive(Debug)]
struct Card(bool);

impl Card {
    fn isCompatible(&self) -> bool {
        self.0
    }
}

struct Vsinder {
    cards: Vec<Card>,
}

impl Iterator for Vsinder {
    type Item = Card;

    fn next(&mut self) -> Option<Self::Item> {
        self.cards
            .pop()
            .map(|card| match card.isCompatible() {
                true => Some(card),
                false => self.next(),
            })
            .flatten()
    }
}

fn main() {
    (Vsinder {
        cards: vec![Card(false), Card(true), Card(false)],
    })
    .next()
    .map(|card| println!("{:?}", card));
}