DynQueue - dynamically extendable Rayon parallel iterator

A DynQueue<T> can be iterated with into_par_iter producing (DynQueueHandle, T) elements. With the DynQueueHandle<T> a new T can be inserted in the DynQueue<T>, which is currently iterated over.

A Vec<T>, VecDeque<T> and crossbeam_queue::SegQueue<T> (with feature = "crossbeam-queue") can be turned into a DynQueue<T> with .into_dyn_queue().

use rayon::iter::IntoParallelIterator as _;
use rayon::iter::ParallelIterator as _;

use dynqueue::IntoDynQueue as _;

fn main() {
    let mut result = vec![1, 2, 3]
        .into_dyn_queue()
        .into_par_iter()
        .map(|(handle, value)| { if value == 2 { handle.enqueue(4) }; value })
        .collect::<Vec<_>>();
    result.sort();

    assert_eq!(result, vec![1, 2, 3, 4]);
}

Features

• crossbeam-queue : to use crossbeam::queue::SegQueue as the inner collection.