Function presser::maybe_uninit_slice_from_vec

pub unsafe fn maybe_uninit_slice_from_vec<T>(
    vec: &mut Vec<T>,
    length: usize
) -> &mut [MaybeUninit<T>]

Takes a Vec and unsafely resizes it to the given length, returning a mutable slice to MaybeUninit<T> for each item in the newly-resized Vec.

Safety

You promise that the given Vec already has at least length capacity. You also promise to either fill all items before dropping the returned slice, or to continue to not violate validity rules for any items that you do not initialize.