/// Data structures for the "pure" min-queues, supporting duplicates but no arbitrary updates
pub mod binary_heap;

/// A data structure usable for backing a "pure" queue
pub trait PureBacking<T: Ord> {
    /// Instantiates a new data structure
    fn new() -> Self;
    /// Places an item into the queue
    fn add(&mut self, item: T);
    /// Removes the item with minimum priority, if it exists
    fn pop(&mut self) -> Option<T>;
    /// The number of items in the queue
    fn len(&self) -> usize;
}