Method iter

publication/code/chapter04/queue.rs:61–68

(&self)

    }

    fn iter(&self) -> Iter<T> {
        let mut iterator = Iter { stack: Vec::new() };
        for item in self.data.iter() {
            iterator.stack.push(item);
        }

        iterator
    }

    fn iter_mut(&mut self) -> IterMut<T> {
        let mut iterator = IterMut { stack: Vec::new() };