#![allow(dead_code, deprecated, unused_variables, unused_mut)]
fn main() {
    unsafe {
        static HAS_DATA: usize = 0x1;
        static FLAG_MASK: usize = !HAS_DATA;
        let my_precious_data: u32 = 17;
        assert!(align_of::< u32 > () > 1);
        let ptr = &my_precious_data as *const u32;
        let tagged = ptr.map_addr(|addr| addr | HAS_DATA);
        if tagged.addr() & HAS_DATA != 0 {
            let data = *tagged.map_addr(|addr| addr & FLAG_MASK);
            assert_eq!(data, 17);
        } else {
            unreachable!()
        }
    }
}