Function get_ipv6_addr_str

crates/stdlib/src/socket.rs:3366–3374

(ipv6: Ipv6Addr)

    }

    fn get_ipv6_addr_str(ipv6: Ipv6Addr) -> String {
        match ipv6.to_ipv4() {
            // instead of "::0.0.ddd.ddd" it's "::xxxx"
            Some(v4) if !ipv6.is_unspecified() && matches!(v4.octets(), [0, 0, _, _]) => {
                format!("::{:x}", u32::from(v4))
            }
            _ => ipv6.to_string(),
        }
    }

    pub(crate) struct Deadline {
        deadline: Instant,