diff --git a/src/libstd/net/mod.rs b/src/libstd/net/mod.rs index 6bbbabfc2690a..545302b83931f 100644 --- a/src/libstd/net/mod.rs +++ b/src/libstd/net/mod.rs @@ -135,6 +135,22 @@ pub fn lookup_host(host: &str) -> io::Result { /// This function may perform a DNS query to resolve `addr` and may also inspect /// system configuration to resolve the specified address. If the address /// cannot be resolved, it is returned in string format. +/// +/// # Examples +/// +/// ```no_run +/// #![feature(lookup_addr)] +/// #![feature(ip_addr)] +/// +/// use std::net::{self, Ipv4Addr, IpAddr}; +/// +/// let ip_addr = "8.8.8.8"; +/// let addr: Ipv4Addr = ip_addr.parse().unwrap(); +/// let hostname = net::lookup_addr(&IpAddr::V4(addr)).unwrap(); +/// +/// println!("{} --> {}", ip_addr, hostname); +/// // Output: 8.8.8.8 --> google-public-dns-a.google.com +/// ``` #[unstable(feature = "lookup_addr", reason = "recent addition", issue = "27705")] #[rustc_deprecated(reason = "ipaddr type is being deprecated",