maybe_uninit_ext

Extended maybe-uninit types.

lib.rs:

maybe_uninit_ext

Support for "extended" maybe-uninit types.

Examples

// Creates a 4x4 grid of `MaybeUninit` values.
let mut grid = maybe_uninit_ext::uninit::<[[MaybeUninit<usize>; 4]; 4]>();
grid.iter_mut().enumerate().for_each(|(i, row)| {
    row.iter_mut().enumerate().for_each(|(j, tile)| {
        tile.write(i * j);
    });
});

// SAFETY: The grid was fully initialized.
let grid = unsafe { maybe_uninit_ext::assume_init(grid) };
assert_eq!(
    grid,
    [[0, 0, 0, 0], [0, 1, 2, 3], [0, 2, 4, 6], [0, 3, 6, 9]],
);

Nightly features

With the nightly feature flag enabled, many of the functions provided by this crate become const. Note that this is requires the nightly toolchain and depends on many unstable features. Use with caution.