Make IpNetwork::broadcast const (#211)

Author: MarkusPettersson98

src/ipv4.rs

@@ -219,10 +219,10 @@ impl Ipv4Network {
     /// let net: Ipv4Network = "10.9.0.32/16".parse().unwrap();
     /// assert_eq!(net.broadcast(), Ipv4Addr::new(10, 9, 255, 255));
     /// ```
-    pub fn broadcast(&self) -> Ipv4Addr {
-        let mask = u32::from(self.mask());
-        let broadcast = u32::from(self.addr) | !mask;
-        Ipv4Addr::from(broadcast)
+    pub const fn broadcast(&self) -> Ipv4Addr {
+        let mask = self.mask().to_bits();
+        let broadcast = self.addr.to_bits() | !mask;
+        Ipv4Addr::from_bits(broadcast)
     }
 
     /// Checks if a given `Ipv4Addr` is in this `Ipv4Network`

src/ipv6.rs

@@ -240,10 +240,10 @@ impl Ipv6Network {
     /// let net: Ipv6Network = "2001:db8::/96".parse().unwrap();
     /// assert_eq!(net.broadcast(), Ipv6Addr::new(0x2001, 0xdb8, 0, 0, 0, 0, 0xffff, 0xffff));
     /// ```
-    pub fn broadcast(&self) -> Ipv6Addr {
-        let mask = u128::from(self.mask());
-        let broadcast = u128::from(self.addr) | !mask;
-        Ipv6Addr::from(broadcast)
+    pub const fn broadcast(&self) -> Ipv6Addr {
+        let mask = self.mask().to_bits();
+        let broadcast = self.addr.to_bits() | !mask;
+        Ipv6Addr::from_bits(broadcast)
     }
 
     /// Checks if a given `Ipv6Addr` is in this `Ipv6Network`

src/lib.rs

@@ -200,7 +200,7 @@ impl IpNetwork {
     /// let net: Ipv4Network = "10.9.0.32/16".parse().unwrap();
     /// assert_eq!(net.broadcast(), Ipv4Addr::new(10, 9, 255, 255));
     /// ```
-    pub fn broadcast(&self) -> IpAddr {
+    pub const fn broadcast(&self) -> IpAddr {
         match *self {
             IpNetwork::V4(ref a) => IpAddr::V4(a.broadcast()),
             IpNetwork::V6(ref a) => IpAddr::V6(a.broadcast()),