output.sh

➜  src  rustc queue.rs
queue.rs:4:8: 4:15 error: wrong number of type arguments: expected 1, found 0
queue.rs:4     q: RingBuf,
                  ^~~~~~~

q.rs

use std::collections::RingBuf;

struct Queue {
    q: RingBuf,
}

impl Queue {
    fn new() -> Queue {
        Queue{
            q: RingBuf::new(),
        }
    }

    fn enque(&self, x: int) {
        self.q.push_back(x);
    }

    fn deque(&self) -> int {
        return self.q.pop_front().unwrap()
    }
}

fn main() {
    let mut queue = Queue::new();
    queue.enque(1i);
    queue.enque(2i);
    queue.enque(3i);

    // Will print 1, 2, 3
    for i in (0i, 3i) {
        let x = queue.deque();
        println!("{}", x);
    }
}