diff --git a/src/libstd/net/addr.rs b/src/libstd/net/addr.rs index 36c06dc0b58..9ef19cd64b3 100644 --- a/src/libstd/net/addr.rs +++ b/src/libstd/net/addr.rs @@ -705,30 +705,74 @@ impl hash::Hash for SocketAddrV6 { /// /// # Examples /// -/// ```no_run -/// use std::net::{SocketAddrV4, TcpStream, UdpSocket, TcpListener, Ipv4Addr}; +/// Creating a [`SocketAddr`] iterator that yields one item: /// -/// fn main() { -/// let ip = Ipv4Addr::new(127, 0, 0, 1); -/// let port = 12345; -/// -/// // The following lines are equivalent modulo possible "localhost" name -/// // resolution differences -/// let tcp_s = TcpStream::connect(SocketAddrV4::new(ip, port)); -/// let tcp_s = TcpStream::connect((ip, port)); -/// let tcp_s = TcpStream::connect(("127.0.0.1", port)); -/// let tcp_s = TcpStream::connect(("localhost", port)); -/// let tcp_s = TcpStream::connect("127.0.0.1:12345"); -/// let tcp_s = TcpStream::connect("localhost:12345"); -/// -/// // TcpListener::bind(), UdpSocket::bind() and UdpSocket::send_to() -/// // behave similarly -/// let tcp_l = TcpListener::bind("localhost:12345"); -/// -/// let mut udp_s = UdpSocket::bind(("127.0.0.1", port)).unwrap(); -/// udp_s.send_to(&[7], (ip, 23451)).unwrap(); -/// } /// ``` +/// use std::net::{ToSocketAddrs, SocketAddr}; +/// +/// let addr = SocketAddr::from(([127, 0, 0, 1], 443)); +/// let mut addrs_iter = addr.to_socket_addrs().unwrap(); +/// +/// assert_eq!(Some(addr), addrs_iter.next()); +/// assert!(addrs_iter.next().is_none()); +/// ``` +/// +/// Creating a [`SocketAddr`] iterator from a hostname: +/// +/// ```no_run +/// use std::net::{SocketAddr, ToSocketAddrs}; +/// +/// // assuming 'localhost' resolves to 127.0.0.1 +/// let mut addrs_iter = "localhost:443".to_socket_addrs().unwrap(); +/// assert_eq!(addrs_iter.next(), Some(SocketAddr::from(([127, 0, 0, 1], 443)))); +/// assert!(addrs_iter.next().is_none()); +/// +/// // assuming 'foo' does not resolve +/// assert!("foo:443".to_socket_addrs().is_err()); +/// ``` +/// +/// Creating a [`SocketAddr`] iterator that yields multiple items: +/// +/// ``` +/// use std::net::{SocketAddr, ToSocketAddrs}; +/// +/// let addr1 = SocketAddr::from(([0, 0, 0, 0], 80)); +/// let addr2 = SocketAddr::from(([127, 0, 0, 1], 443)); +/// let addrs = vec![addr1, addr2]; +/// +/// let mut addrs_iter = (&addrs[..]).to_socket_addrs().unwrap(); +/// +/// assert_eq!(Some(addr1), addrs_iter.next()); +/// assert_eq!(Some(addr2), addrs_iter.next()); +/// assert!(addrs_iter.next().is_none()); +/// ``` +/// +/// Attempting to create a [`SocketAddr`] iterator from an improperly formatted +/// socket address `&str` (missing the port): +/// +/// ``` +/// use std::io; +/// use std::net::ToSocketAddrs; +/// +/// let err = "127.0.0.1".to_socket_addrs().unwrap_err(); +/// assert_eq!(err.kind(), io::ErrorKind::InvalidInput); +/// ``` +/// +/// [`TcpStream::connect`] is an example of an function that utilizes +/// `ToSocketsAddr` as a trait bound on its parameter in order to accept +/// different types: +/// +/// ```no_run +/// use std::net::{TcpStream, Ipv4Addr}; +/// +/// let stream = TcpStream::connect(("127.0.0.1", 443)); +/// // or +/// let stream = TcpStream::connect("127.0.0.1.443"); +/// // or +/// let stream = TcpStream::connect((Ipv4Addr::new(127, 0, 0, 1), 443)); +/// ``` +/// +/// [`TcpStream::connect`]: ../../std/net/struct.TcpStream.html#method.connect #[stable(feature = "rust1", since = "1.0.0")] pub trait ToSocketAddrs { /// Returned iterator over socket addresses which this type may correspond