Method next

publication/code/chapter04/queue.rs:84–90

(&mut self)

impl<T: Clone> Iterator for IntoIter<T> {
    type Item = T;
    fn next(&mut self) -> Option<Self::Item> {
        if !self.0.is_empty() {
            Some(self.0.data.remove(0))
        } else {
            None
        }
    }
}

struct Iter<'a, T: 'a> { stack: Vec<&'a T>, }