diff --git a/library/std/src/lib.rs b/library/std/src/lib.rs
index 0797585e3df3f..3141b3b9526d0 100644
--- a/library/std/src/lib.rs
+++ b/library/std/src/lib.rs
@@ -238,6 +238,7 @@
#![feature(concat_idents)]
#![feature(const_cstr_unchecked)]
#![feature(const_fn_transmute)]
+#![feature(const_ipv6)]
#![feature(const_raw_ptr_deref)]
#![feature(container_error_extra)]
#![feature(core_intrinsics)]
diff --git a/library/std/src/net/ip.rs b/library/std/src/net/ip.rs
index 10676b49d4375..341a112df71b3 100644
--- a/library/std/src/net/ip.rs
+++ b/library/std/src/net/ip.rs
@@ -1102,8 +1102,9 @@ impl Ipv6Addr {
/// assert_eq!(Ipv6Addr::new(0, 0, 0, 0, 0, 0xffff, 0xc00a, 0x2ff).segments(),
/// [0, 0, 0, 0, 0, 0xffff, 0xc00a, 0x2ff]);
/// ```
+ #[rustc_const_unstable(feature = "const_ipv6", issue = "76205")]
#[stable(feature = "rust1", since = "1.0.0")]
- pub fn segments(&self) -> [u16; 8] {
+ pub const fn segments(&self) -> [u16; 8] {
// All elements in `s6_addr` must be big endian.
// SAFETY: `[u8; 16]` is always safe to transmute to `[u16; 8]`.
let [a, b, c, d, e, f, g, h] = unsafe { transmute::<_, [u16; 8]>(self.inner.s6_addr) };
@@ -1135,9 +1136,10 @@ impl Ipv6Addr {
/// assert_eq!(Ipv6Addr::new(0, 0, 0, 0, 0, 0xffff, 0xc00a, 0x2ff).is_unspecified(), false);
/// assert_eq!(Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 0).is_unspecified(), true);
/// ```
+ #[rustc_const_unstable(feature = "const_ipv6", issue = "76205")]
#[stable(since = "1.7.0", feature = "ip_17")]
- pub fn is_unspecified(&self) -> bool {
- self.segments() == [0, 0, 0, 0, 0, 0, 0, 0]
+ pub const fn is_unspecified(&self) -> bool {
+ u128::from_be_bytes(self.octets()) == u128::from_be_bytes(Ipv6Addr::UNSPECIFIED.octets())
}
/// Returns [`true`] if this is a loopback address (::1).
@@ -1155,9 +1157,10 @@ impl Ipv6Addr {
/// assert_eq!(Ipv6Addr::new(0, 0, 0, 0, 0, 0xffff, 0xc00a, 0x2ff).is_loopback(), false);
/// assert_eq!(Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 0x1).is_loopback(), true);
/// ```
+ #[rustc_const_unstable(feature = "const_ipv6", issue = "76205")]
#[stable(since = "1.7.0", feature = "ip_17")]
- pub fn is_loopback(&self) -> bool {
- self.segments() == [0, 0, 0, 0, 0, 0, 0, 1]
+ pub const fn is_loopback(&self) -> bool {
+ u128::from_be_bytes(self.octets()) == u128::from_be_bytes(Ipv6Addr::LOCALHOST.octets())
}
/// Returns [`true`] if the address appears to be globally routable.
@@ -1182,7 +1185,8 @@ impl Ipv6Addr {
/// assert_eq!(Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 0x1).is_global(), false);
/// assert_eq!(Ipv6Addr::new(0, 0, 0x1c9, 0, 0, 0xafc8, 0, 0x1).is_global(), true);
/// ```
- pub fn is_global(&self) -> bool {
+ #[rustc_const_unstable(feature = "const_ipv6", issue = "76205")]
+ pub const fn is_global(&self) -> bool {
match self.multicast_scope() {
Some(Ipv6MulticastScope::Global) => true,
None => self.is_unicast_global(),
@@ -1208,7 +1212,8 @@ impl Ipv6Addr {
/// assert_eq!(Ipv6Addr::new(0, 0, 0, 0, 0, 0xffff, 0xc00a, 0x2ff).is_unique_local(), false);
/// assert_eq!(Ipv6Addr::new(0xfc02, 0, 0, 0, 0, 0, 0, 0).is_unique_local(), true);
/// ```
- pub fn is_unique_local(&self) -> bool {
+ #[rustc_const_unstable(feature = "const_ipv6", issue = "76205")]
+ pub const fn is_unique_local(&self) -> bool {
(self.segments()[0] & 0xfe00) == 0xfc00
}
@@ -1263,7 +1268,8 @@ impl Ipv6Addr {
/// [IETF RFC 4291]: https://tools.ietf.org/html/rfc4291
/// [IETF RFC 4291 section 2.5.6]: https://tools.ietf.org/html/rfc4291#section-2.5.6
/// [RFC 4291 errata 4406]: https://www.rfc-editor.org/errata/eid4406
- pub fn is_unicast_link_local_strict(&self) -> bool {
+ #[rustc_const_unstable(feature = "const_ipv6", issue = "76205")]
+ pub const fn is_unicast_link_local_strict(&self) -> bool {
(self.segments()[0] & 0xffff) == 0xfe80
&& (self.segments()[1] & 0xffff) == 0
&& (self.segments()[2] & 0xffff) == 0
@@ -1320,7 +1326,8 @@ impl Ipv6Addr {
///
/// [IETF RFC 4291 section 2.4]: https://tools.ietf.org/html/rfc4291#section-2.4
/// [RFC 4291 errata 4406]: https://www.rfc-editor.org/errata/eid4406
- pub fn is_unicast_link_local(&self) -> bool {
+ #[rustc_const_unstable(feature = "const_ipv6", issue = "76205")]
+ pub const fn is_unicast_link_local(&self) -> bool {
(self.segments()[0] & 0xffc0) == 0xfe80
}
@@ -1359,7 +1366,8 @@ impl Ipv6Addr {
/// addresses.
///
/// [RFC 3879]: https://tools.ietf.org/html/rfc3879
- pub fn is_unicast_site_local(&self) -> bool {
+ #[rustc_const_unstable(feature = "const_ipv6", issue = "76205")]
+ pub const fn is_unicast_site_local(&self) -> bool {
(self.segments()[0] & 0xffc0) == 0xfec0
}
@@ -1381,7 +1389,8 @@ impl Ipv6Addr {
/// assert_eq!(Ipv6Addr::new(0, 0, 0, 0, 0, 0xffff, 0xc00a, 0x2ff).is_documentation(), false);
/// assert_eq!(Ipv6Addr::new(0x2001, 0xdb8, 0, 0, 0, 0, 0, 0).is_documentation(), true);
/// ```
- pub fn is_documentation(&self) -> bool {
+ #[rustc_const_unstable(feature = "const_ipv6", issue = "76205")]
+ pub const fn is_documentation(&self) -> bool {
(self.segments()[0] == 0x2001) && (self.segments()[1] == 0xdb8)
}
@@ -1416,7 +1425,8 @@ impl Ipv6Addr {
/// assert_eq!(Ipv6Addr::new(0x2001, 0xdb8, 0, 0, 0, 0, 0, 0).is_unicast_global(), false);
/// assert_eq!(Ipv6Addr::new(0, 0, 0, 0, 0, 0xffff, 0xc00a, 0x2ff).is_unicast_global(), true);
/// ```
- pub fn is_unicast_global(&self) -> bool {
+ #[rustc_const_unstable(feature = "const_ipv6", issue = "76205")]
+ pub const fn is_unicast_global(&self) -> bool {
!self.is_multicast()
&& !self.is_loopback()
&& !self.is_unicast_link_local()
@@ -1440,7 +1450,8 @@ impl Ipv6Addr {
/// );
/// assert_eq!(Ipv6Addr::new(0, 0, 0, 0, 0, 0xffff, 0xc00a, 0x2ff).multicast_scope(), None);
/// ```
- pub fn multicast_scope(&self) -> Option<Ipv6MulticastScope> {
+ #[rustc_const_unstable(feature = "const_ipv6", issue = "76205")]
+ pub const fn multicast_scope(&self) -> Option<Ipv6MulticastScope> {
if self.is_multicast() {
match self.segments()[0] & 0x000f {
1 => Some(Ipv6MulticastScope::InterfaceLocal),
@@ -1472,8 +1483,9 @@ impl Ipv6Addr {
/// assert_eq!(Ipv6Addr::new(0xff00, 0, 0, 0, 0, 0, 0, 0).is_multicast(), true);
/// assert_eq!(Ipv6Addr::new(0, 0, 0, 0, 0, 0xffff, 0xc00a, 0x2ff).is_multicast(), false);
/// ```
+ #[rustc_const_unstable(feature = "const_ipv6", issue = "76205")]
#[stable(since = "1.7.0", feature = "ip_17")]
- pub fn is_multicast(&self) -> bool {
+ pub const fn is_multicast(&self) -> bool {
(self.segments()[0] & 0xff00) == 0xff00
}
@@ -1498,7 +1510,8 @@ impl Ipv6Addr {
/// Some(Ipv4Addr::new(192, 10, 2, 255)));
/// assert_eq!(Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 1).to_ipv4_mapped(), None);
/// ```
- pub fn to_ipv4_mapped(&self) -> Option<Ipv4Addr> {
+ #[rustc_const_unstable(feature = "const_ipv6", issue = "76205")]
+ pub const fn to_ipv4_mapped(&self) -> Option<Ipv4Addr> {
match self.octets() {
[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xff, 0xff, a, b, c, d] => {
Some(Ipv4Addr::new(a, b, c, d))
@@ -1525,8 +1538,9 @@ impl Ipv6Addr {
/// assert_eq!(Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 1).to_ipv4(),
/// Some(Ipv4Addr::new(0, 0, 0, 1)));
/// ```
+ #[rustc_const_unstable(feature = "const_ipv6", issue = "76205")]
#[stable(feature = "rust1", since = "1.0.0")]
- pub fn to_ipv4(&self) -> Option<Ipv4Addr> {
+ pub const fn to_ipv4(&self) -> Option<Ipv4Addr> {
if let [0, 0, 0, 0, 0, 0 | 0xffff, ab, cd] = self.segments() {
let [a, b] = ab.to_be_bytes();
let [c, d] = cd.to_be_bytes();
diff --git a/src/test/ui/consts/std/net/ipv6.rs b/src/test/ui/consts/std/net/ipv6.rs
new file mode 100644
index 0000000000000..e3841c38c2231
--- /dev/null
+++ b/src/test/ui/consts/std/net/ipv6.rs
@@ -0,0 +1,53 @@
+// run-pass
+
+#![feature(ip)]
+#![feature(const_ipv6)]
+
+use std::net::{Ipv4Addr, Ipv6Addr, Ipv6MulticastScope};
+
+fn main() {
+ const IP_ADDRESS : Ipv6Addr = Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 1);
+ assert_eq!(IP_ADDRESS, Ipv6Addr::LOCALHOST);
+
+ const SEGMENTS : [u16; 8] = IP_ADDRESS.segments();
+ assert_eq!(SEGMENTS, [0 ,0 ,0 ,0 ,0 ,0 ,0, 1]);
+
+ const OCTETS : [u8; 16] = IP_ADDRESS.octets();
+ assert_eq!(OCTETS, [0 ,0 ,0 ,0 ,0 ,0 ,0, 0 ,0 ,0 ,0 ,0 ,0 ,0, 0, 1]);
+
+ const IS_UNSPECIFIED : bool = IP_ADDRESS.is_unspecified();
+ assert!(!IS_UNSPECIFIED);
+
+ const IS_LOOPBACK : bool = IP_ADDRESS.is_loopback();
+ assert!(IS_LOOPBACK);
+
+ const IS_GLOBAL : bool = IP_ADDRESS.is_global();
+ assert!(!IS_GLOBAL);
+
+ const IS_UNIQUE_LOCAL : bool = IP_ADDRESS.is_unique_local();
+ assert!(!IS_UNIQUE_LOCAL);
+
+ const IS_UNICAST_LINK_LOCAL_STRICT : bool = IP_ADDRESS.is_unicast_link_local_strict();
+ assert!(!IS_UNICAST_LINK_LOCAL_STRICT);
+
+ const IS_UNICAST_LINK_LOCAL : bool = IP_ADDRESS.is_unicast_link_local();
+ assert!(!IS_UNICAST_LINK_LOCAL);
+
+ const IS_UNICAST_SITE_LOCAL : bool = IP_ADDRESS.is_unicast_site_local();
+ assert!(!IS_UNICAST_SITE_LOCAL);
+
+ const IS_DOCUMENTATION : bool = IP_ADDRESS.is_documentation();
+ assert!(!IS_DOCUMENTATION);
+
+ const IS_UNICAST_GLOBAL : bool = IP_ADDRESS.is_unicast_global();
+ assert!(!IS_UNICAST_GLOBAL);
+
+ const MULTICAST_SCOPE : Option<Ipv6MulticastScope> = IP_ADDRESS.multicast_scope();
+ assert_eq!(MULTICAST_SCOPE, None);
+
+ const IS_MULTICAST : bool = IP_ADDRESS.is_multicast();
+ assert!(!IS_MULTICAST);
+
+ const IP_V4 : Option<Ipv4Addr> = IP_ADDRESS.to_ipv4();
+ assert_eq!(IP_V4.unwrap(), Ipv4Addr::new(0, 0, 0, 1));
+}