#![allow(dead_code, deprecated, unused_variables, unused_mut)]
use std::net::Ipv6Addr;
fn main() {
    let localhost = Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 1);
    assert_eq!("::1".parse(), Ok(localhost));
    assert_eq!(localhost.is_loopback(), true);
}