#![allow(dead_code, deprecated, unused_variables, unused_mut)]
use std::net::{IpAddr, Ipv6Addr};
fn main() {
    let addr = Ipv6Addr::new(0, 0, 0, 0, 0, 0xffff, 0xc00a, 0x2ff);
    assert_eq!(IpAddr::V6(addr), IpAddr::from(addr));
}