Skeleton Code for Rust Iterator

task.rs

pub struct TaskSet;

pub struct TaskSetIterator {
...
}

impl Iterator for TaskSetIterator {
  type Item = Task;
  
  fn next(&mut self) -> Option<Task> {
    ....
  }
}

pub struct Task;

impl IntoIterator for TaskSet {
  type Item = Task;
  type IntoIter = TaskSetIterator;
  
  fn into_iter(self) -> Self::IntoIter {
    TaskSetIterator { ... }
  }
}