maybe_uninit_ext

扩展maybe-uninit类型。

lib.rs:

maybe_uninit_ext

支持“扩展”的maybe-uninit类型。

示例

// 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]],
);

夜间特性

启用nightly特性标志后，此crate提供的许多函数变为const。请注意，这需要夜间工具链，并依赖于许多不稳定特性。请谨慎使用。