#![allow(dead_code, deprecated, unused_variables, unused_mut)]
#![feature(ptr_alignment_type)]
#![feature(ptr_mask)]
use std::ptr::{Alignment, NonNull};
#[repr(align(1))]
struct Align1(u8);
#[repr(align(2))]
struct Align2(u16);
#[repr(align(4))]
struct Align4(u32);
fn main() {
    let one = <NonNull<Align1>>::dangling().as_ptr();
    let two = <NonNull<Align2>>::dangling().as_ptr();
    let four = <NonNull<Align4>>::dangling().as_ptr();
    assert_eq!(four.mask(Alignment::of::< Align1 > ().mask()), four);
    assert_eq!(four.mask(Alignment::of::< Align2 > ().mask()), four);
    assert_eq!(four.mask(Alignment::of::< Align4 > ().mask()), four);
    assert_ne!(one.mask(Alignment::of::< Align4 > ().mask()), one);
}