#![allow(dead_code, deprecated, unused_variables, unused_mut)]
use std::net::Ipv6Addr;
fn main() {
    assert_eq!(
        Ipv6Addr::new(0, 0, 0, 0, 0, 0xffff, 0xc00a, 0x2ff).is_unspecified(), false
    );
    assert_eq!(Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 0).is_unspecified(), true);
}