From 1c43e53c8ffe672a041850c25471e32a926e2314 Mon Sep 17 00:00:00 2001
From: Murarth <murarth@gmail.com>
Date: Thu, 26 Mar 2015 13:31:37 -0700
Subject: [PATCH] impl `FromStr` for `IpAddr`

---
 src/libstd/net/parser.rs | 18 ++++++++++++------
 1 file changed, 12 insertions(+), 6 deletions(-)

diff --git a/src/libstd/net/parser.rs b/src/libstd/net/parser.rs
index e7509834c7b78..7c1667a603f65 100644
--- a/src/libstd/net/parser.rs
+++ b/src/libstd/net/parser.rs
@@ -16,7 +16,7 @@
 use prelude::v1::*;
 
 use str::FromStr;
-use net::{Ipv4Addr, Ipv6Addr, SocketAddr, SocketAddrV4, SocketAddrV6};
+use net::{IpAddr, Ipv4Addr, Ipv6Addr, SocketAddr, SocketAddrV4, SocketAddrV6};
 
 struct Parser<'a> {
     // parsing as ASCII, so can use byte array
@@ -24,11 +24,6 @@ struct Parser<'a> {
     pos: usize,
 }
 
-enum IpAddr {
-    V4(Ipv4Addr),
-    V6(Ipv6Addr),
-}
-
 impl<'a> Parser<'a> {
     fn new(s: &'a str) -> Parser<'a> {
         Parser {
@@ -296,6 +291,17 @@ impl<'a> Parser<'a> {
     }
 }
 
+#[unstable(feature = "ip_addr", reason = "recent addition")]
+impl FromStr for IpAddr {
+    type Err = AddrParseError;
+    fn from_str(s: &str) -> Result<IpAddr, AddrParseError> {
+        match Parser::new(s).read_till_eof(|p| p.read_ip_addr()) {
+            Some(s) => Ok(s),
+            None => Err(AddrParseError(()))
+        }
+    }
+}
+
 #[stable(feature = "rust1", since = "1.0.0")]
 impl FromStr for Ipv4Addr {
     type Err = AddrParseError;