Function gstd::prelude::slice::sort::unstable::sort

pub fn sort<T, F>(v: &mut [T], is_less: &mut F)
where
    F: FnMut(&T, &T) -> bool,

🔬This is a nightly-only experimental API. (slice_internals)

Unstable sort called ipnsort by Lukas Bergdoll. Design document: https://github.com/Voultapher/sort-research-rs/blob/main/writeup/ipnsort_introduction/text.md

Upholds all safety properties outlined here: https://github.com/Voultapher/sort-research-rs/blob/main/writeup/sort_safety/text.md