#![allow(dead_code, deprecated, unused_variables, unused_mut)]
#![feature(maybe_uninit_as_bytes, maybe_uninit_write_slice, maybe_uninit_slice)]
use std::mem::MaybeUninit;
fn main() {
    let mut uninit = [MaybeUninit::<u16>::uninit(), MaybeUninit::<u16>::uninit()];
    let uninit_bytes = uninit.as_bytes_mut();
    uninit_bytes.write_copy_of_slice(&[0x12, 0x34, 0x56, 0x78]);
    let vals = unsafe { uninit.assume_init_ref() };
    if cfg!(target_endian = "little") {
        assert_eq!(vals, & [0x3412u16, 0x7856u16]);
    } else {
        assert_eq!(vals, & [0x1234u16, 0x5678u16]);
    }
}