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/// Test that one can emulate join with `scope`:
fn pseudo_join<F, G>(f: F, g: G)
where
F: FnOnce() + Send,
G: FnOnce() + Send,
{
rayon_core::scope(|s| {
s.spawn(|_| g());
f();
});
}
fn quick_sort<T: PartialOrd + Send>(v: &mut [T]) {
if v.len() <= 1 {
return;
}
let mid = partition(v);
let (lo, hi) = v.split_at_mut(mid);
pseudo_join(|| quick_sort(lo), || quick_sort(hi));
}
fn partition<T: PartialOrd + Send>(v: &mut [T]) -> usize {
let pivot = v.len() - 1;
let mut i = 0;
for j in 0..pivot {
if v[j] <= v[pivot] {
v.swap(i, j);
i += 1;
}
}
v.swap(i, pivot);
i
}
fn is_sorted<T: Send + Ord>(v: &[T]) -> bool {
(1..v.len()).all(|i| v[i - 1] <= v[i])
}
#[test]
fn scope_join() {
let mut v: Vec<i32> = (0..256).rev().collect();
quick_sort(&mut v);
assert!(is_sorted(&v));
}