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 <!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Source of the Rust file `/root/.cargo/registry/src/github.com-1ecc6299db9ec823/ipnet-2.7.2/src/ipnet.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>ipnet.rs - source</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceSerif4-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../FiraSans-Regular.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../FiraSans-Medium.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceCodePro-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceSerif4-Bold.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceCodePro-Semibold.ttf.woff2"><link rel="stylesheet" href="../../normalize.css"><link rel="stylesheet" href="../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" href="../../ayu.css" disabled><link rel="stylesheet" href="../../dark.css" disabled><link rel="stylesheet" href="../../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../../storage.js"></script><script defer src="../../source-script.js"></script><script defer src="../../source-files.js"></script><script defer src="../../main.js"></script><noscript><link rel="stylesheet" href="../../noscript.css"></noscript><link rel="alternate icon" type="image/png" href="../../favicon-16x16.png"><link rel="alternate icon" type="image/png" href="../../favicon-32x32.png"><link rel="icon" type="image/svg+xml" href="../../favicon.svg"></head><body class="rustdoc source"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><a class="sidebar-logo" href="../../ipnet/index.html"><div class="logo-container"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></div></a></nav><main><div class="width-limiter"><nav class="sub"><a class="sub-logo-container" href="../../ipnet/index.html"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></a><form class="search-form"><div class="search-container"><span></span><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><div id="help-button" title="help" tabindex="-1"><a href="../../help.html">?</a></div><div id="settings-menu" tabindex="-1"><a href="../../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../../wheel.svg"></a></div></div></form></nav><section id="main-content" class="content"><div class="example-wrap"><pre class="src-line-numbers"><span id="1">1</span>
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 </pre><pre class="rust"><code><span class="kw">use </span>std::cmp::{min, max};
 <span class="kw">use </span>std::cmp::Ordering::{Less, Equal};
 <span class="kw">use </span>std::convert::From;
 <span class="kw">use </span>std::error::Error;
 <span class="kw">use </span>std::fmt;
 <span class="kw">use </span>std::iter::FusedIterator;
 <span class="kw">use </span>std::net::{IpAddr, Ipv4Addr, Ipv6Addr};
 <span class="kw">use </span>std::option::Option::{<span class="prelude-val">Some</span>, <span class="prelude-val">None</span>};

 <span class="kw">use </span><span class="kw">crate</span>::ipext::{IpAdd, IpSub, IpStep, IpAddrRange, Ipv4AddrRange, Ipv6AddrRange};
 <span class="kw">use </span><span class="kw">crate</span>::mask::{ip_mask_to_prefix, ipv4_mask_to_prefix, ipv6_mask_to_prefix};

 <span class="doccomment">/// An IP network address, either IPv4 or IPv6.
 ///
 /// This enum can contain either an [`Ipv4Net`] or an [`Ipv6Net`]. A
 /// [`From`] implementation is provided to convert these into an
 /// `IpNet`.
 ///
 /// # Textual representation
 ///
 /// `IpNet` provides a [`FromStr`] implementation for parsing network
 /// addresses represented in CIDR notation. See [IETF RFC 4632] for the
 /// CIDR notation.
 ///
 /// [`Ipv4Net`]: struct.Ipv4Net.html
 /// [`Ipv6Net`]: struct.Ipv6Net.html
 /// [`From`]: https://doc.rust-lang.org/std/convert/trait.From.html
 /// [`FromStr`]: https://doc.rust-lang.org/std/str/trait.FromStr.html
 /// [IETF RFC 4632]: https://tools.ietf.org/html/rfc4632
 ///
 /// # Examples
 ///
 /// ```
 /// use std::net::IpAddr;
 /// use ipnet::IpNet;
 ///
 /// let net: IpNet = &quot;10.1.1.0/24&quot;.parse().unwrap();
 /// assert_eq!(Ok(net.network()), &quot;10.1.1.0&quot;.parse());
 ///
 /// let net: IpNet = &quot;fd00::/32&quot;.parse().unwrap();
 /// assert_eq!(Ok(net.network()), &quot;fd00::&quot;.parse());
 /// ```
 </span><span class="attribute">#[derive(Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Hash)]
 </span><span class="kw">pub enum </span>IpNet {
     V4(Ipv4Net),
     V6(Ipv6Net),
 }

 <span class="doccomment">/// An IPv4 network address.
 ///
 /// See [`IpNet`] for a type encompassing both IPv4 and IPv6 network
 /// addresses.
 ///
 /// # Textual representation
 ///
 /// `Ipv4Net` provides a [`FromStr`] implementation for parsing network
 /// addresses represented in CIDR notation. See [IETF RFC 4632] for the
 /// CIDR notation.
 ///
 /// [`IpNet`]: enum.IpNet.html
 /// [`FromStr`]: https://doc.rust-lang.org/std/str/trait.FromStr.html
 /// [IETF RFC 4632]: https://tools.ietf.org/html/rfc4632
 ///
 /// # Examples
 ///
 /// ```
 /// use std::net::Ipv4Addr;
 /// use ipnet::Ipv4Net;
 ///
 /// let net: Ipv4Net = &quot;10.1.1.0/24&quot;.parse().unwrap();
 /// assert_eq!(Ok(net.network()), &quot;10.1.1.0&quot;.parse());
 /// ```
 </span><span class="attribute">#[derive(Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Hash)]
 </span><span class="kw">pub struct </span>Ipv4Net {
     addr: Ipv4Addr,
     prefix_len: u8,
 }

 <span class="doccomment">/// An IPv6 network address.
 ///
 /// See [`IpNet`] for a type encompassing both IPv4 and IPv6 network
 /// addresses.
 ///
 /// # Textual representation
 ///
 /// `Ipv6Net` provides a [`FromStr`] implementation for parsing network
 /// addresses represented in CIDR notation. See [IETF RFC 4632] for the
 /// CIDR notation.
 ///
 /// [`IpNet`]: enum.IpNet.html
 /// [`FromStr`]: https://doc.rust-lang.org/std/str/trait.FromStr.html
 /// [IETF RFC 4632]: https://tools.ietf.org/html/rfc4632
 ///
 /// # Examples
 ///
 /// ```
 /// use std::net::Ipv6Addr;
 /// use ipnet::Ipv6Net;
 ///
 /// let net: Ipv6Net = &quot;fd00::/32&quot;.parse().unwrap();
 /// assert_eq!(Ok(net.network()), &quot;fd00::&quot;.parse());
 /// ```
 </span><span class="attribute">#[derive(Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Hash)]
 </span><span class="kw">pub struct </span>Ipv6Net {
     addr: Ipv6Addr,
     prefix_len: u8,
 }

 <span class="doccomment">/// An error which can be returned when the prefix length is invalid.
 ///
 /// Valid prefix lengths are 0 to 32 for IPv4 and 0 to 128 for IPv6.
 </span><span class="attribute">#[derive(Debug, Clone, PartialEq, Eq)]
 </span><span class="kw">pub struct </span>PrefixLenError;

 <span class="kw">impl </span>fmt::Display <span class="kw">for </span>PrefixLenError {
     <span class="kw">fn </span>fmt(<span class="kw-2">&amp;</span><span class="self">self</span>, fmt: <span class="kw-2">&amp;mut </span>fmt::Formatter) -&gt; fmt::Result {
         fmt.write_str(<span class="string">&quot;invalid IP prefix length&quot;</span>)
     }
 }

 <span class="kw">impl </span>Error <span class="kw">for </span>PrefixLenError {}

 <span class="kw">impl </span>IpNet {
     <span class="doccomment">/// Creates a new IP network address from an `IpAddr` and prefix
     /// length.
     ///
     /// # Examples
     ///
     /// ```
     /// use std::net::Ipv6Addr;
     /// use ipnet::{IpNet, PrefixLenError};
     ///
     /// let net = IpNet::new(Ipv6Addr::LOCALHOST.into(), 48);
     /// assert!(net.is_ok());
     ///
     /// let bad_prefix_len = IpNet::new(Ipv6Addr::LOCALHOST.into(), 129);
     /// assert_eq!(bad_prefix_len, Err(PrefixLenError));
     /// ```
     </span><span class="kw">pub fn </span>new(ip: IpAddr, prefix_len: u8) -&gt; <span class="prelude-ty">Result</span>&lt;IpNet, PrefixLenError&gt; {
         <span class="prelude-val">Ok</span>(<span class="kw">match </span>ip {
             IpAddr::V4(a) =&gt; Ipv4Net::new(a, prefix_len)<span class="question-mark">?</span>.into(),
             IpAddr::V6(a) =&gt; Ipv6Net::new(a, prefix_len)<span class="question-mark">?</span>.into(),
         })
     }

     <span class="doccomment">/// Creates a new IP network address from an `IpAddr` and netmask.
     ///
     /// # Examples
     ///
     /// ```
     /// use std::net::Ipv6Addr;
     /// use ipnet::{IpNet, PrefixLenError};
     ///
     /// let net = IpNet::with_netmask(Ipv6Addr::LOCALHOST.into(), Ipv6Addr::from(0xffff_ffff_ffff_0000_0000_0000_0000_0000).into());
     /// assert!(net.is_ok());
     ///
     /// let bad_prefix_len = IpNet::with_netmask(Ipv6Addr::LOCALHOST.into(), Ipv6Addr::from(0xffff_ffff_ffff_0000_0001_0000_0000_0000).into());
     /// assert_eq!(bad_prefix_len, Err(PrefixLenError));
     /// ```
     </span><span class="kw">pub fn </span>with_netmask(ip: IpAddr, netmask: IpAddr) -&gt; <span class="prelude-ty">Result</span>&lt;IpNet, PrefixLenError&gt; {
         <span class="kw">let </span>prefix = ip_mask_to_prefix(netmask)<span class="question-mark">?</span>;
         <span class="self">Self</span>::new(ip, prefix)
     }

     <span class="doccomment">/// Returns a copy of the network with the address truncated to the
     /// prefix length.
     ///
     /// # Examples
     ///
     /// ```
     /// # use ipnet::IpNet;
     /// #
     /// assert_eq!(
     ///     &quot;192.168.12.34/16&quot;.parse::&lt;IpNet&gt;().unwrap().trunc(),
     ///     &quot;192.168.0.0/16&quot;.parse().unwrap()
     /// );
     ///
     /// assert_eq!(
     ///     &quot;fd00::1:2:3:4/16&quot;.parse::&lt;IpNet&gt;().unwrap().trunc(),
     ///     &quot;fd00::/16&quot;.parse().unwrap()
     /// );
     /// ```
     </span><span class="kw">pub fn </span>trunc(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; IpNet {
         <span class="kw">match </span><span class="kw-2">*</span><span class="self">self </span>{
             IpNet::V4(<span class="kw-2">ref </span>a) =&gt; IpNet::V4(a.trunc()),
             IpNet::V6(<span class="kw-2">ref </span>a) =&gt; IpNet::V6(a.trunc()),
         }
     }

     <span class="doccomment">/// Returns the address.
     </span><span class="kw">pub fn </span>addr(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; IpAddr {
         <span class="kw">match </span><span class="kw-2">*</span><span class="self">self </span>{
             IpNet::V4(<span class="kw-2">ref </span>a) =&gt; IpAddr::V4(a.addr),
             IpNet::V6(<span class="kw-2">ref </span>a) =&gt; IpAddr::V6(a.addr),
         }
     }

     <span class="doccomment">/// Returns the prefix length.
     </span><span class="kw">pub fn </span>prefix_len(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; u8 {
         <span class="kw">match </span><span class="kw-2">*</span><span class="self">self </span>{
             IpNet::V4(<span class="kw-2">ref </span>a) =&gt; a.prefix_len(),
             IpNet::V6(<span class="kw-2">ref </span>a) =&gt; a.prefix_len(),
         }
     }

     <span class="doccomment">/// Returns the maximum valid prefix length.
     </span><span class="kw">pub fn </span>max_prefix_len(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; u8 {
         <span class="kw">match </span><span class="kw-2">*</span><span class="self">self </span>{
             IpNet::V4(<span class="kw-2">ref </span>a) =&gt; a.max_prefix_len(),
             IpNet::V6(<span class="kw-2">ref </span>a) =&gt; a.max_prefix_len(),
         }
     }

     <span class="doccomment">/// Returns the network mask.
     ///
     /// # Examples
     ///
     /// ```
     /// # use std::net::IpAddr;
     /// # use ipnet::IpNet;
     /// #
     /// let net: IpNet = &quot;10.1.0.0/20&quot;.parse().unwrap();
     /// assert_eq!(Ok(net.netmask()), &quot;255.255.240.0&quot;.parse());
     ///
     /// let net: IpNet = &quot;fd00::/24&quot;.parse().unwrap();
     /// assert_eq!(Ok(net.netmask()), &quot;ffff:ff00::&quot;.parse());
     /// ```
     </span><span class="kw">pub fn </span>netmask(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; IpAddr {
         <span class="kw">match </span><span class="kw-2">*</span><span class="self">self </span>{
             IpNet::V4(<span class="kw-2">ref </span>a) =&gt; IpAddr::V4(a.netmask()),
             IpNet::V6(<span class="kw-2">ref </span>a) =&gt; IpAddr::V6(a.netmask()),
         }
     }

     <span class="doccomment">/// Returns the host mask.
     ///
     /// # Examples
     ///
     /// ```
     /// # use std::net::IpAddr;
     /// # use ipnet::IpNet;
     /// #
     /// let net: IpNet = &quot;10.1.0.0/20&quot;.parse().unwrap();
     /// assert_eq!(Ok(net.hostmask()), &quot;0.0.15.255&quot;.parse());
     ///
     /// let net: IpNet = &quot;fd00::/24&quot;.parse().unwrap();
     /// assert_eq!(Ok(net.hostmask()), &quot;::ff:ffff:ffff:ffff:ffff:ffff:ffff&quot;.parse());
     /// ```
     </span><span class="kw">pub fn </span>hostmask(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; IpAddr {
         <span class="kw">match </span><span class="kw-2">*</span><span class="self">self </span>{
             IpNet::V4(<span class="kw-2">ref </span>a) =&gt; IpAddr::V4(a.hostmask()),
             IpNet::V6(<span class="kw-2">ref </span>a) =&gt; IpAddr::V6(a.hostmask()),
         }
     }

     <span class="doccomment">/// Returns the network address.
     ///
     /// # Examples
     ///
     /// ```
     /// # use std::net::IpAddr;
     /// # use ipnet::IpNet;
     /// #
     /// let net: IpNet = &quot;172.16.123.123/16&quot;.parse().unwrap();
     /// assert_eq!(Ok(net.network()), &quot;172.16.0.0&quot;.parse());
     ///
     /// let net: IpNet = &quot;fd00:1234:5678::/24&quot;.parse().unwrap();
     /// assert_eq!(Ok(net.network()), &quot;fd00:1200::&quot;.parse());
     /// ```
     </span><span class="kw">pub fn </span>network(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; IpAddr {
         <span class="kw">match </span><span class="kw-2">*</span><span class="self">self </span>{
             IpNet::V4(<span class="kw-2">ref </span>a) =&gt; IpAddr::V4(a.network()),
             IpNet::V6(<span class="kw-2">ref </span>a) =&gt; IpAddr::V6(a.network()),
         }
     }

     <span class="doccomment">/// Returns the broadcast address.
     ///
     /// # Examples
     ///
     /// ```
     /// # use std::net::IpAddr;
     /// # use ipnet::IpNet;
     /// #
     /// let net: IpNet = &quot;172.16.0.0/22&quot;.parse().unwrap();
     /// assert_eq!(Ok(net.broadcast()), &quot;172.16.3.255&quot;.parse());
     ///
     /// let net: IpNet = &quot;fd00:1234:5678::/24&quot;.parse().unwrap();
     /// assert_eq!(Ok(net.broadcast()), &quot;fd00:12ff:ffff:ffff:ffff:ffff:ffff:ffff&quot;.parse());
     /// ```
     </span><span class="kw">pub fn </span>broadcast(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; IpAddr {
         <span class="kw">match </span><span class="kw-2">*</span><span class="self">self </span>{
             IpNet::V4(<span class="kw-2">ref </span>a) =&gt; IpAddr::V4(a.broadcast()),
             IpNet::V6(<span class="kw-2">ref </span>a) =&gt; IpAddr::V6(a.broadcast()),
         }
     }

     <span class="doccomment">/// Returns the `IpNet` that contains this one.
     ///
     /// # Examples
     ///
     /// ```
     /// # use ipnet::IpNet;
     /// #
     /// let n1: IpNet = &quot;172.16.1.0/24&quot;.parse().unwrap();
     /// let n2: IpNet = &quot;172.16.0.0/23&quot;.parse().unwrap();
     /// let n3: IpNet = &quot;172.16.0.0/0&quot;.parse().unwrap();
     ///
     /// assert_eq!(n1.supernet().unwrap(), n2);
     /// assert_eq!(n3.supernet(), None);
     ///
     /// let n1: IpNet = &quot;fd00:ff00::/24&quot;.parse().unwrap();
     /// let n2: IpNet = &quot;fd00:fe00::/23&quot;.parse().unwrap();
     /// let n3: IpNet = &quot;fd00:fe00::/0&quot;.parse().unwrap();
     ///
     /// assert_eq!(n1.supernet().unwrap(), n2);
     /// assert_eq!(n3.supernet(), None);
     /// ```
     </span><span class="kw">pub fn </span>supernet(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; <span class="prelude-ty">Option</span>&lt;IpNet&gt; {
         <span class="kw">match </span><span class="kw-2">*</span><span class="self">self </span>{
             IpNet::V4(<span class="kw-2">ref </span>a) =&gt; a.supernet().map(IpNet::V4),
             IpNet::V6(<span class="kw-2">ref </span>a) =&gt; a.supernet().map(IpNet::V6),
         }
     }

     <span class="doccomment">/// Returns `true` if this network and the given network are
     /// children of the same supernet.
     ///
     /// # Examples
     ///
     /// ```
     /// # use ipnet::IpNet;
     /// #
     /// let n4_1: IpNet = &quot;10.1.0.0/24&quot;.parse().unwrap();
     /// let n4_2: IpNet = &quot;10.1.1.0/24&quot;.parse().unwrap();
     /// let n4_3: IpNet = &quot;10.1.2.0/24&quot;.parse().unwrap();
     /// let n6_1: IpNet = &quot;fd00::/18&quot;.parse().unwrap();
     /// let n6_2: IpNet = &quot;fd00:4000::/18&quot;.parse().unwrap();
     /// let n6_3: IpNet = &quot;fd00:8000::/18&quot;.parse().unwrap();
     ///
     /// assert!( n4_1.is_sibling(&amp;n4_2));
     /// assert!(!n4_2.is_sibling(&amp;n4_3));
     /// assert!( n6_1.is_sibling(&amp;n6_2));
     /// assert!(!n6_2.is_sibling(&amp;n6_3));
     /// assert!(!n4_1.is_sibling(&amp;n6_2));
     /// ```
     </span><span class="kw">pub fn </span>is_sibling(<span class="kw-2">&amp;</span><span class="self">self</span>, other: <span class="kw-2">&amp;</span>IpNet) -&gt; bool {
         <span class="kw">match </span>(<span class="kw-2">*</span><span class="self">self</span>, <span class="kw-2">*</span>other) {
             (IpNet::V4(<span class="kw-2">ref </span>a), IpNet::V4(<span class="kw-2">ref </span>b)) =&gt; a.is_sibling(b),
             (IpNet::V6(<span class="kw-2">ref </span>a), IpNet::V6(<span class="kw-2">ref </span>b)) =&gt; a.is_sibling(b),
             <span class="kw">_ </span>=&gt; <span class="bool-val">false</span>,
         }
     }

     <span class="doccomment">/// Return an `Iterator` over the host addresses in this network.
     ///
     /// # Examples
     ///
     /// ```
     /// # use std::net::IpAddr;
     /// # use ipnet::IpNet;
     /// #
     /// let net: IpNet = &quot;10.0.0.0/30&quot;.parse().unwrap();
     /// assert_eq!(net.hosts().collect::&lt;Vec&lt;IpAddr&gt;&gt;(), vec![
     ///     &quot;10.0.0.1&quot;.parse::&lt;IpAddr&gt;().unwrap(),
     ///     &quot;10.0.0.2&quot;.parse().unwrap(),
     /// ]);
     ///
     /// let net: IpNet = &quot;10.0.0.0/31&quot;.parse().unwrap();
     /// assert_eq!(net.hosts().collect::&lt;Vec&lt;IpAddr&gt;&gt;(), vec![
     ///     &quot;10.0.0.0&quot;.parse::&lt;IpAddr&gt;().unwrap(),
     ///     &quot;10.0.0.1&quot;.parse().unwrap(),
     /// ]);
     ///
     /// let net: IpNet = &quot;fd00::/126&quot;.parse().unwrap();
     /// assert_eq!(net.hosts().collect::&lt;Vec&lt;IpAddr&gt;&gt;(), vec![
     ///     &quot;fd00::&quot;.parse::&lt;IpAddr&gt;().unwrap(),
     ///     &quot;fd00::1&quot;.parse().unwrap(),
     ///     &quot;fd00::2&quot;.parse().unwrap(),
     ///     &quot;fd00::3&quot;.parse().unwrap(),
     /// ]);
     /// ```
     </span><span class="kw">pub fn </span>hosts(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; IpAddrRange {
         <span class="kw">match </span><span class="kw-2">*</span><span class="self">self </span>{
             IpNet::V4(<span class="kw-2">ref </span>a) =&gt; IpAddrRange::V4(a.hosts()),
             IpNet::V6(<span class="kw-2">ref </span>a) =&gt; IpAddrRange::V6(a.hosts()),
         }
     }

     <span class="doccomment">/// Returns an `Iterator` over the subnets of this network with the
     /// given prefix length.
     ///
     /// # Examples
     ///
     /// ```
     /// # use ipnet::{IpNet, PrefixLenError};
     /// #
     /// let net: IpNet = &quot;10.0.0.0/24&quot;.parse().unwrap();
     /// assert_eq!(net.subnets(26).unwrap().collect::&lt;Vec&lt;IpNet&gt;&gt;(), vec![
     ///     &quot;10.0.0.0/26&quot;.parse::&lt;IpNet&gt;().unwrap(),
     ///     &quot;10.0.0.64/26&quot;.parse().unwrap(),
     ///     &quot;10.0.0.128/26&quot;.parse().unwrap(),
     ///     &quot;10.0.0.192/26&quot;.parse().unwrap(),
     /// ]);
     ///
     /// let net: IpNet = &quot;fd00::/16&quot;.parse().unwrap();
     /// assert_eq!(net.subnets(18).unwrap().collect::&lt;Vec&lt;IpNet&gt;&gt;(), vec![
     ///     &quot;fd00::/18&quot;.parse::&lt;IpNet&gt;().unwrap(),
     ///     &quot;fd00:4000::/18&quot;.parse().unwrap(),
     ///     &quot;fd00:8000::/18&quot;.parse().unwrap(),
     ///     &quot;fd00:c000::/18&quot;.parse().unwrap(),
     /// ]);
     ///
     /// let net: IpNet = &quot;10.0.0.0/24&quot;.parse().unwrap();
     /// assert_eq!(net.subnets(23), Err(PrefixLenError));
     ///
     /// let net: IpNet = &quot;10.0.0.0/24&quot;.parse().unwrap();
     /// assert_eq!(net.subnets(33), Err(PrefixLenError));
     ///
     /// let net: IpNet = &quot;fd00::/16&quot;.parse().unwrap();
     /// assert_eq!(net.subnets(15), Err(PrefixLenError));
     ///
     /// let net: IpNet = &quot;fd00::/16&quot;.parse().unwrap();
     /// assert_eq!(net.subnets(129), Err(PrefixLenError));
     /// ```
     </span><span class="kw">pub fn </span>subnets(<span class="kw-2">&amp;</span><span class="self">self</span>, new_prefix_len: u8) -&gt; <span class="prelude-ty">Result</span>&lt;IpSubnets, PrefixLenError&gt; {
         <span class="kw">match </span><span class="kw-2">*</span><span class="self">self </span>{
             IpNet::V4(<span class="kw-2">ref </span>a) =&gt; a.subnets(new_prefix_len).map(IpSubnets::V4),
             IpNet::V6(<span class="kw-2">ref </span>a) =&gt; a.subnets(new_prefix_len).map(IpSubnets::V6),
         }
     }

     <span class="doccomment">/// Test if a network address contains either another network
     /// address or an IP address.
     ///
     /// # Examples
     ///
     /// ```
     /// # use std::net::IpAddr;
     /// # use ipnet::IpNet;
     /// #
     /// let net4: IpNet = &quot;192.168.0.0/24&quot;.parse().unwrap();
     /// let net4_yes: IpNet = &quot;192.168.0.0/25&quot;.parse().unwrap();
     /// let net4_no: IpNet = &quot;192.168.0.0/23&quot;.parse().unwrap();
     /// let ip4_yes: IpAddr = &quot;192.168.0.1&quot;.parse().unwrap();
     /// let ip4_no: IpAddr = &quot;192.168.1.0&quot;.parse().unwrap();
     ///
     /// assert!(net4.contains(&amp;net4));
     /// assert!(net4.contains(&amp;net4_yes));
     /// assert!(!net4.contains(&amp;net4_no));
     /// assert!(net4.contains(&amp;ip4_yes));
     /// assert!(!net4.contains(&amp;ip4_no));
     ///
     ///
     /// let net6: IpNet = &quot;fd00::/16&quot;.parse().unwrap();
     /// let net6_yes: IpNet = &quot;fd00::/17&quot;.parse().unwrap();
     /// let net6_no: IpNet = &quot;fd00::/15&quot;.parse().unwrap();
     /// let ip6_yes: IpAddr = &quot;fd00::1&quot;.parse().unwrap();
     /// let ip6_no: IpAddr = &quot;fd01::&quot;.parse().unwrap();
     ///
     /// assert!(net6.contains(&amp;net6));
     /// assert!(net6.contains(&amp;net6_yes));
     /// assert!(!net6.contains(&amp;net6_no));
     /// assert!(net6.contains(&amp;ip6_yes));
     /// assert!(!net6.contains(&amp;ip6_no));
     ///
     /// assert!(!net4.contains(&amp;net6));
     /// assert!(!net6.contains(&amp;net4));
     /// assert!(!net4.contains(&amp;ip6_no));
     /// assert!(!net6.contains(&amp;ip4_no));
     /// ```
     </span><span class="kw">pub fn </span>contains&lt;T&gt;(<span class="kw-2">&amp;</span><span class="self">self</span>, other: T) -&gt; bool <span class="kw">where </span><span class="self">Self</span>: Contains&lt;T&gt; {
         Contains::contains(<span class="self">self</span>, other)
     }

     <span class="doccomment">/// Aggregate a `Vec` of `IpNet`s and return the result as a new
     /// `Vec`.
     ///
     /// # Examples
     ///
     /// ```
     /// # use ipnet::IpNet;
     /// #
     /// let nets = vec![
     ///     &quot;10.0.0.0/24&quot;.parse::&lt;IpNet&gt;().unwrap(),
     ///     &quot;10.0.1.0/24&quot;.parse().unwrap(),
     ///     &quot;10.0.2.0/24&quot;.parse().unwrap(),
     ///     &quot;fd00::/18&quot;.parse().unwrap(),
     ///     &quot;fd00:4000::/18&quot;.parse().unwrap(),
     ///     &quot;fd00:8000::/18&quot;.parse().unwrap(),
     /// ];
     ///
     /// assert_eq!(IpNet::aggregate(&amp;nets), vec![
     ///     &quot;10.0.0.0/23&quot;.parse::&lt;IpNet&gt;().unwrap(),
     ///     &quot;10.0.2.0/24&quot;.parse().unwrap(),
     ///     &quot;fd00::/17&quot;.parse().unwrap(),
     ///     &quot;fd00:8000::/18&quot;.parse().unwrap(),
     /// ]);
     /// ```
     </span><span class="kw">pub fn </span>aggregate(networks: <span class="kw-2">&amp;</span>Vec&lt;IpNet&gt;) -&gt; Vec&lt;IpNet&gt; {
         <span class="comment">// It&#39;s 2.5x faster to split the input up and run them using the
         // specific IPv4 and IPV6 implementations. merge_intervals() and
         // the comparisons are much faster running over integers.
         </span><span class="kw">let </span><span class="kw-2">mut </span>ipv4nets: Vec&lt;Ipv4Net&gt; = Vec::new();
         <span class="kw">let </span><span class="kw-2">mut </span>ipv6nets: Vec&lt;Ipv6Net&gt; = Vec::new();

         <span class="kw">for </span>n <span class="kw">in </span>networks {
             <span class="kw">match </span><span class="kw-2">*</span>n {
                 IpNet::V4(x) =&gt; ipv4nets.push(x),
                 IpNet::V6(x) =&gt; ipv6nets.push(x),
             }
         }

         <span class="kw">let </span><span class="kw-2">mut </span>res: Vec&lt;IpNet&gt; = Vec::new();
         <span class="kw">let </span>ipv4aggs = Ipv4Net::aggregate(<span class="kw-2">&amp;</span>ipv4nets);
         <span class="kw">let </span>ipv6aggs = Ipv6Net::aggregate(<span class="kw-2">&amp;</span>ipv6nets);
         res.extend::&lt;Vec&lt;IpNet&gt;&gt;(ipv4aggs.into_iter().map(IpNet::V4).collect::&lt;Vec&lt;IpNet&gt;&gt;());
         res.extend::&lt;Vec&lt;IpNet&gt;&gt;(ipv6aggs.into_iter().map(IpNet::V6).collect::&lt;Vec&lt;IpNet&gt;&gt;());
         res
     }
 }

 <span class="kw">impl </span>Default <span class="kw">for </span>IpNet {
     <span class="kw">fn </span>default() -&gt; <span class="self">Self </span>{
         <span class="self">Self</span>::V4(Ipv4Net::default())
     }
 }

 <span class="kw">impl </span>fmt::Debug <span class="kw">for </span>IpNet {
     <span class="kw">fn </span>fmt(<span class="kw-2">&amp;</span><span class="self">self</span>, fmt: <span class="kw-2">&amp;mut </span>fmt::Formatter) -&gt; fmt::Result {
         fmt::Display::fmt(<span class="self">self</span>, fmt)
     }
 }

 <span class="kw">impl </span>fmt::Display <span class="kw">for </span>IpNet {
     <span class="kw">fn </span>fmt(<span class="kw-2">&amp;</span><span class="self">self</span>, fmt: <span class="kw-2">&amp;mut </span>fmt::Formatter) -&gt; fmt::Result {
         <span class="kw">match </span><span class="kw-2">*</span><span class="self">self </span>{
             IpNet::V4(<span class="kw-2">ref </span>a) =&gt; a.fmt(fmt),
             IpNet::V6(<span class="kw-2">ref </span>a) =&gt; a.fmt(fmt),
         }
     }
 }

 <span class="kw">impl </span>From&lt;Ipv4Net&gt; <span class="kw">for </span>IpNet {
     <span class="kw">fn </span>from(net: Ipv4Net) -&gt; IpNet {
         IpNet::V4(net)
     }
 }

 <span class="kw">impl </span>From&lt;Ipv6Net&gt; <span class="kw">for </span>IpNet {
     <span class="kw">fn </span>from(net: Ipv6Net) -&gt; IpNet {
         IpNet::V6(net)
     }
 }

 <span class="kw">impl </span>From&lt;IpAddr&gt; <span class="kw">for </span>IpNet {
     <span class="kw">fn </span>from(addr: IpAddr) -&gt; IpNet {
         <span class="kw">match </span>addr {
             IpAddr::V4(a) =&gt; IpNet::V4(a.into()),
             IpAddr::V6(a) =&gt; IpNet::V6(a.into()),
         }
     }
 }

 <span class="kw">impl </span>Ipv4Net {
     <span class="doccomment">/// Creates a new IPv4 network address from an `Ipv4Addr` and prefix
     /// length.
     ///
     /// # Examples
     ///
     /// ```
     /// use std::net::Ipv4Addr;
     /// use ipnet::{Ipv4Net, PrefixLenError};
     ///
     /// let net = Ipv4Net::new(Ipv4Addr::new(10, 1, 1, 0), 24);
     /// assert!(net.is_ok());
     ///
     /// let bad_prefix_len = Ipv4Net::new(Ipv4Addr::new(10, 1, 1, 0), 33);
     /// assert_eq!(bad_prefix_len, Err(PrefixLenError));
     /// ```
     </span><span class="attribute">#[inline]
     </span><span class="kw">pub const fn </span>new(ip: Ipv4Addr, prefix_len: u8) -&gt; <span class="prelude-ty">Result</span>&lt;Ipv4Net, PrefixLenError&gt; {
         <span class="kw">if </span>prefix_len &gt; <span class="number">32 </span>{
             <span class="kw">return </span><span class="prelude-val">Err</span>(PrefixLenError);
         }
         <span class="prelude-val">Ok</span>(Ipv4Net { addr: ip, prefix_len: prefix_len })
     }

     <span class="doccomment">/// Creates a new IPv4 network address from an `Ipv4Addr` and netmask.
     ///
     /// # Examples
     ///
     /// ```
     /// use std::net::Ipv4Addr;
     /// use ipnet::{Ipv4Net, PrefixLenError};
     ///
     /// let net = Ipv4Net::with_netmask(Ipv4Addr::new(10, 1, 1, 0), Ipv4Addr::new(255, 255, 255, 0));
     /// assert!(net.is_ok());
     ///
     /// let bad_prefix_len = Ipv4Net::with_netmask(Ipv4Addr::new(10, 1, 1, 0), Ipv4Addr::new(255, 255, 0, 1));
     /// assert_eq!(bad_prefix_len, Err(PrefixLenError));
     /// ```
     </span><span class="kw">pub fn </span>with_netmask(ip: Ipv4Addr, netmask: Ipv4Addr) -&gt; <span class="prelude-ty">Result</span>&lt;Ipv4Net, PrefixLenError&gt; {
         <span class="kw">let </span>prefix = ipv4_mask_to_prefix(netmask)<span class="question-mark">?</span>;
         <span class="self">Self</span>::new(ip, prefix)
     }

     <span class="doccomment">/// Returns a copy of the network with the address truncated to the
     /// prefix length.
     ///
     /// # Examples
     ///
     /// ```
     /// # use ipnet::Ipv4Net;
     /// #
     /// assert_eq!(
     ///     &quot;192.168.12.34/16&quot;.parse::&lt;Ipv4Net&gt;().unwrap().trunc(),
     ///     &quot;192.168.0.0/16&quot;.parse().unwrap()
     /// );
     /// ```
     </span><span class="kw">pub fn </span>trunc(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; Ipv4Net {
         Ipv4Net::new(<span class="self">self</span>.network(), <span class="self">self</span>.prefix_len).unwrap()
     }

     <span class="doccomment">/// Returns the address.
     </span><span class="attribute">#[inline]
     </span><span class="kw">pub const fn </span>addr(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; Ipv4Addr {
         <span class="self">self</span>.addr
     }

     <span class="doccomment">/// Returns the prefix length.
     </span><span class="attribute">#[inline]
     </span><span class="kw">pub const fn </span>prefix_len(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; u8 {
         <span class="self">self</span>.prefix_len
     }

     <span class="doccomment">/// Returns the maximum valid prefix length.
     </span><span class="attribute">#[inline]
     </span><span class="kw">pub const fn </span>max_prefix_len(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; u8 {
         <span class="number">32
     </span>}

     <span class="doccomment">/// Returns the network mask.
     ///
     /// # Examples
     ///
     /// ```
     /// # use std::net::Ipv4Addr;
     /// # use ipnet::Ipv4Net;
     /// #
     /// let net: Ipv4Net = &quot;10.1.0.0/20&quot;.parse().unwrap();
     /// assert_eq!(Ok(net.netmask()), &quot;255.255.240.0&quot;.parse());
     /// ```
     </span><span class="kw">pub fn </span>netmask(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; Ipv4Addr {
         Ipv4Addr::from(<span class="self">self</span>.netmask_u32())
     }

     <span class="kw">fn </span>netmask_u32(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; u32 {
         u32::max_value().checked_shl(<span class="number">32 </span>- <span class="self">self</span>.prefix_len <span class="kw">as </span>u32).unwrap_or(<span class="number">0</span>)
     }

     <span class="doccomment">/// Returns the host mask.
     ///
     /// # Examples
     ///
     /// ```
     /// # use std::net::Ipv4Addr;
     /// # use ipnet::Ipv4Net;
     /// #
     /// let net: Ipv4Net = &quot;10.1.0.0/20&quot;.parse().unwrap();
     /// assert_eq!(Ok(net.hostmask()), &quot;0.0.15.255&quot;.parse());
     /// ```
     </span><span class="kw">pub fn </span>hostmask(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; Ipv4Addr {
         Ipv4Addr::from(<span class="self">self</span>.hostmask_u32())
     }

     <span class="kw">fn </span>hostmask_u32(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; u32 {
         u32::max_value().checked_shr(<span class="self">self</span>.prefix_len <span class="kw">as </span>u32).unwrap_or(<span class="number">0</span>)
     }

     <span class="doccomment">/// Returns the network address.
     ///
     /// # Examples
     ///
     /// ```
     /// # use std::net::Ipv4Addr;
     /// # use ipnet::Ipv4Net;
     /// #
     /// let net: Ipv4Net = &quot;172.16.123.123/16&quot;.parse().unwrap();
     /// assert_eq!(Ok(net.network()), &quot;172.16.0.0&quot;.parse());
     /// ```
     </span><span class="kw">pub fn </span>network(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; Ipv4Addr {
         Ipv4Addr::from(u32::from(<span class="self">self</span>.addr) &amp; <span class="self">self</span>.netmask_u32())
     }

     <span class="doccomment">/// Returns the broadcast address.
     ///
     /// # Examples
     ///
     /// ```
     /// # use std::net::Ipv4Addr;
     /// # use ipnet::Ipv4Net;
     /// #
     /// let net: Ipv4Net = &quot;172.16.0.0/22&quot;.parse().unwrap();
     /// assert_eq!(Ok(net.broadcast()), &quot;172.16.3.255&quot;.parse());
     /// ```
     </span><span class="kw">pub fn </span>broadcast(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; Ipv4Addr {
         Ipv4Addr::from(u32::from(<span class="self">self</span>.addr) | <span class="self">self</span>.hostmask_u32())
     }

     <span class="doccomment">/// Returns the `Ipv4Net` that contains this one.
     ///
     /// # Examples
     ///
     /// ```
     /// # use ipnet::Ipv4Net;
     /// #
     /// let n1: Ipv4Net = &quot;172.16.1.0/24&quot;.parse().unwrap();
     /// let n2: Ipv4Net = &quot;172.16.0.0/23&quot;.parse().unwrap();
     /// let n3: Ipv4Net = &quot;172.16.0.0/0&quot;.parse().unwrap();
     ///
     /// assert_eq!(n1.supernet().unwrap(), n2);
     /// assert_eq!(n3.supernet(), None);
     /// ```
     </span><span class="kw">pub fn </span>supernet(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; <span class="prelude-ty">Option</span>&lt;Ipv4Net&gt; {
         Ipv4Net::new(<span class="self">self</span>.addr, <span class="self">self</span>.prefix_len.wrapping_sub(<span class="number">1</span>)).map(|n| n.trunc()).ok()
     }

     <span class="doccomment">/// Returns `true` if this network and the given network are
     /// children of the same supernet.
     ///
     /// # Examples
     ///
     /// ```
     /// # use ipnet::Ipv4Net;
     /// #
     /// let n1: Ipv4Net = &quot;10.1.0.0/24&quot;.parse().unwrap();
     /// let n2: Ipv4Net = &quot;10.1.1.0/24&quot;.parse().unwrap();
     /// let n3: Ipv4Net = &quot;10.1.2.0/24&quot;.parse().unwrap();
     ///
     /// assert!(n1.is_sibling(&amp;n2));
     /// assert!(!n2.is_sibling(&amp;n3));
     /// ```
     </span><span class="kw">pub fn </span>is_sibling(<span class="kw-2">&amp;</span><span class="self">self</span>, other: <span class="kw-2">&amp;</span>Ipv4Net) -&gt; bool {
         <span class="self">self</span>.prefix_len &gt; <span class="number">0 </span>&amp;&amp;
         <span class="self">self</span>.prefix_len == other.prefix_len &amp;&amp;
         <span class="self">self</span>.supernet().unwrap().contains(other)
     }

     <span class="doccomment">/// Return an `Iterator` over the host addresses in this network.
     ///
     /// If the prefix length is less than 31 both the network address
     /// and broadcast address are excluded. These are only valid host
     /// addresses when the prefix length is 31.
     ///
     /// # Examples
     ///
     /// ```
     /// # use std::net::Ipv4Addr;
     /// # use ipnet::Ipv4Net;
     /// #
     /// let net: Ipv4Net = &quot;10.0.0.0/30&quot;.parse().unwrap();
     /// assert_eq!(net.hosts().collect::&lt;Vec&lt;Ipv4Addr&gt;&gt;(), vec![
     ///     &quot;10.0.0.1&quot;.parse::&lt;Ipv4Addr&gt;().unwrap(),
     ///     &quot;10.0.0.2&quot;.parse().unwrap(),
     /// ]);
     ///
     /// let net: Ipv4Net = &quot;10.0.0.0/31&quot;.parse().unwrap();
     /// assert_eq!(net.hosts().collect::&lt;Vec&lt;Ipv4Addr&gt;&gt;(), vec![
     ///     &quot;10.0.0.0&quot;.parse::&lt;Ipv4Addr&gt;().unwrap(),
     ///     &quot;10.0.0.1&quot;.parse().unwrap(),
     /// ]);
     /// ```
     </span><span class="kw">pub fn </span>hosts(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; Ipv4AddrRange {
         <span class="kw">let </span><span class="kw-2">mut </span>start = <span class="self">self</span>.network();
         <span class="kw">let </span><span class="kw-2">mut </span>end = <span class="self">self</span>.broadcast();

         <span class="kw">if </span><span class="self">self</span>.prefix_len &lt; <span class="number">31 </span>{
             start = start.saturating_add(<span class="number">1</span>);
             end = end.saturating_sub(<span class="number">1</span>);
         }

         Ipv4AddrRange::new(start, end)
     }

     <span class="doccomment">/// Returns an `Iterator` over the subnets of this network with the
     /// given prefix length.
     ///
     /// # Examples
     ///
     /// ```
     /// # use ipnet::{Ipv4Net, PrefixLenError};
     /// #
     /// let net: Ipv4Net = &quot;10.0.0.0/24&quot;.parse().unwrap();
     /// assert_eq!(net.subnets(26).unwrap().collect::&lt;Vec&lt;Ipv4Net&gt;&gt;(), vec![
     ///     &quot;10.0.0.0/26&quot;.parse::&lt;Ipv4Net&gt;().unwrap(),
     ///     &quot;10.0.0.64/26&quot;.parse().unwrap(),
     ///     &quot;10.0.0.128/26&quot;.parse().unwrap(),
     ///     &quot;10.0.0.192/26&quot;.parse().unwrap(),
     /// ]);
     ///
     /// let net: Ipv4Net = &quot;10.0.0.0/30&quot;.parse().unwrap();
     /// assert_eq!(net.subnets(32).unwrap().collect::&lt;Vec&lt;Ipv4Net&gt;&gt;(), vec![
     ///     &quot;10.0.0.0/32&quot;.parse::&lt;Ipv4Net&gt;().unwrap(),
     ///     &quot;10.0.0.1/32&quot;.parse().unwrap(),
     ///     &quot;10.0.0.2/32&quot;.parse().unwrap(),
     ///     &quot;10.0.0.3/32&quot;.parse().unwrap(),
     /// ]);
     ///
     /// let net: Ipv4Net = &quot;10.0.0.0/24&quot;.parse().unwrap();
     /// assert_eq!(net.subnets(23), Err(PrefixLenError));
     ///
     /// let net: Ipv4Net = &quot;10.0.0.0/24&quot;.parse().unwrap();
     /// assert_eq!(net.subnets(33), Err(PrefixLenError));
     /// ```
     </span><span class="kw">pub fn </span>subnets(<span class="kw-2">&amp;</span><span class="self">self</span>, new_prefix_len: u8) -&gt; <span class="prelude-ty">Result</span>&lt;Ipv4Subnets, PrefixLenError&gt; {
         <span class="kw">if </span><span class="self">self</span>.prefix_len &gt; new_prefix_len || new_prefix_len &gt; <span class="number">32 </span>{
             <span class="kw">return </span><span class="prelude-val">Err</span>(PrefixLenError);
         }

         <span class="prelude-val">Ok</span>(Ipv4Subnets::new(
             <span class="self">self</span>.network(),
             <span class="self">self</span>.broadcast(),
             new_prefix_len,
         ))
     }

     <span class="doccomment">/// Test if a network address contains either another network
     /// address or an IP address.
     ///
     /// # Examples
     ///
     /// ```
     /// # use std::net::Ipv4Addr;
     /// # use ipnet::Ipv4Net;
     /// #
     /// let net: Ipv4Net = &quot;192.168.0.0/24&quot;.parse().unwrap();
     /// let net_yes: Ipv4Net = &quot;192.168.0.0/25&quot;.parse().unwrap();
     /// let net_no: Ipv4Net = &quot;192.168.0.0/23&quot;.parse().unwrap();
     /// let ip_yes: Ipv4Addr = &quot;192.168.0.1&quot;.parse().unwrap();
     /// let ip_no: Ipv4Addr = &quot;192.168.1.0&quot;.parse().unwrap();
     ///
     /// assert!(net.contains(&amp;net));
     /// assert!(net.contains(&amp;net_yes));
     /// assert!(!net.contains(&amp;net_no));
     /// assert!(net.contains(&amp;ip_yes));
     /// assert!(!net.contains(&amp;ip_no));
     /// ```
     </span><span class="kw">pub fn </span>contains&lt;T&gt;(<span class="kw-2">&amp;</span><span class="self">self</span>, other: T) -&gt; bool <span class="kw">where </span><span class="self">Self</span>: Contains&lt;T&gt; {
         Contains::contains(<span class="self">self</span>, other)
     }

     <span class="comment">// It is significantly faster to work on u32 than Ipv4Addr.
     </span><span class="kw">fn </span>interval(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; (u32, u32) {
         (
             u32::from(<span class="self">self</span>.network()),
             u32::from(<span class="self">self</span>.broadcast()).saturating_add(<span class="number">1</span>),
         )
     }

     <span class="doccomment">/// Aggregate a `Vec` of `Ipv4Net`s and return the result as a new
     /// `Vec`.
     ///
     /// # Examples
     ///
     /// ```
     /// # use ipnet::Ipv4Net;
     /// #
     /// let nets = vec![
     ///     &quot;10.0.0.0/24&quot;.parse::&lt;Ipv4Net&gt;().unwrap(),
     ///     &quot;10.0.1.0/24&quot;.parse().unwrap(),
     ///     &quot;10.0.2.0/24&quot;.parse().unwrap(),
     /// ];
     ///
     /// assert_eq!(Ipv4Net::aggregate(&amp;nets), vec![
     ///     &quot;10.0.0.0/23&quot;.parse::&lt;Ipv4Net&gt;().unwrap(),
     ///     &quot;10.0.2.0/24&quot;.parse().unwrap(),
     /// ]);
     </span><span class="kw">pub fn </span>aggregate(networks: <span class="kw-2">&amp;</span>Vec&lt;Ipv4Net&gt;) -&gt; Vec&lt;Ipv4Net&gt; {
         <span class="kw">let </span><span class="kw-2">mut </span>intervals: Vec&lt;(<span class="kw">_</span>, <span class="kw">_</span>)&gt; = networks.iter().map(|n| n.interval()).collect();
         intervals = merge_intervals(intervals);
         <span class="kw">let </span><span class="kw-2">mut </span>res: Vec&lt;Ipv4Net&gt; = Vec::new();

         <span class="kw">for </span>(start, <span class="kw-2">mut </span>end) <span class="kw">in </span>intervals {
             <span class="kw">if </span>end != std::u32::MAX {
                 end = end.saturating_sub(<span class="number">1</span>)
             }
             <span class="kw">let </span>iter = Ipv4Subnets::new(start.into(), end.into(), <span class="number">0</span>);
             res.extend(iter);
         }
         res
     }
 }

 <span class="kw">impl </span>Default <span class="kw">for </span>Ipv4Net {
     <span class="kw">fn </span>default() -&gt; <span class="self">Self </span>{
         <span class="self">Self </span>{
             addr: Ipv4Addr::from(<span class="number">0</span>),
             prefix_len: <span class="number">0</span>,
         }
     }
 }

 <span class="kw">impl </span>fmt::Debug <span class="kw">for </span>Ipv4Net {
     <span class="kw">fn </span>fmt(<span class="kw-2">&amp;</span><span class="self">self</span>, fmt: <span class="kw-2">&amp;mut </span>fmt::Formatter) -&gt; fmt::Result {
         fmt::Display::fmt(<span class="self">self</span>, fmt)
     }
 }

 <span class="kw">impl </span>fmt::Display <span class="kw">for </span>Ipv4Net {
     <span class="kw">fn </span>fmt(<span class="kw-2">&amp;</span><span class="self">self</span>, fmt: <span class="kw-2">&amp;mut </span>fmt::Formatter) -&gt; fmt::Result {
         <span class="macro">write!</span>(fmt, <span class="string">&quot;{}/{}&quot;</span>, <span class="self">self</span>.addr, <span class="self">self</span>.prefix_len)
     }
 }

 <span class="kw">impl </span>From&lt;Ipv4Addr&gt; <span class="kw">for </span>Ipv4Net {
     <span class="kw">fn </span>from(addr: Ipv4Addr) -&gt; Ipv4Net {
         Ipv4Net { addr, prefix_len: <span class="number">32 </span>}
     }
 }

 <span class="kw">impl </span>Ipv6Net {
     <span class="doccomment">/// Creates a new IPv6 network address from an `Ipv6Addr` and prefix
     /// length.
     ///
     /// # Examples
     ///
     /// ```
     /// use std::net::Ipv6Addr;
     /// use ipnet::{Ipv6Net, PrefixLenError};
     ///
     /// let net = Ipv6Net::new(Ipv6Addr::new(0xfd, 0, 0, 0, 0, 0, 0, 0), 24);
     /// assert!(net.is_ok());
     ///
     /// let bad_prefix_len = Ipv6Net::new(Ipv6Addr::new(0xfd, 0, 0, 0, 0, 0, 0, 0), 129);
     /// assert_eq!(bad_prefix_len, Err(PrefixLenError));
     /// ```
     </span><span class="attribute">#[inline]
     </span><span class="kw">pub const fn </span>new(ip: Ipv6Addr, prefix_len: u8) -&gt; <span class="prelude-ty">Result</span>&lt;Ipv6Net, PrefixLenError&gt; {
         <span class="kw">if </span>prefix_len &gt; <span class="number">128 </span>{
             <span class="kw">return </span><span class="prelude-val">Err</span>(PrefixLenError);
         }
         <span class="prelude-val">Ok</span>(Ipv6Net { addr: ip, prefix_len: prefix_len })
     }

     <span class="doccomment">/// Creates a new IPv6 network address from an `Ipv6Addr` and netmask.
     ///
     /// # Examples
     ///
     /// ```
     /// use std::net::Ipv6Addr;
     /// use ipnet::{Ipv6Net, PrefixLenError};
     ///
     /// let net = Ipv6Net::with_netmask(Ipv6Addr::new(0xfd, 0, 0, 0, 0, 0, 0, 0), Ipv6Addr::from(0xffff_ff00_0000_0000_0000_0000_0000_0000));
     /// assert!(net.is_ok());
     ///
     /// let bad_prefix_len = Ipv6Net::with_netmask(Ipv6Addr::new(0xfd, 0, 0, 0, 0, 0, 0, 0), Ipv6Addr::from(0xffff_ff00_0000_0000_0001_0000_0000_0000));
     /// assert_eq!(bad_prefix_len, Err(PrefixLenError));
     /// ```
     </span><span class="kw">pub fn </span>with_netmask(ip: Ipv6Addr, netmask: Ipv6Addr) -&gt; <span class="prelude-ty">Result</span>&lt;Ipv6Net, PrefixLenError&gt; {
         <span class="kw">let </span>prefix = ipv6_mask_to_prefix(netmask)<span class="question-mark">?</span>;
         <span class="self">Self</span>::new(ip, prefix)
     }

     <span class="doccomment">/// Returns a copy of the network with the address truncated to the
     /// prefix length.
     ///
     /// # Examples
     ///
     /// ```
     /// # use ipnet::Ipv6Net;
     /// #
     /// assert_eq!(
     ///     &quot;fd00::1:2:3:4/16&quot;.parse::&lt;Ipv6Net&gt;().unwrap().trunc(),
     ///     &quot;fd00::/16&quot;.parse().unwrap()
     /// );
     /// ```
     </span><span class="kw">pub fn </span>trunc(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; Ipv6Net {
         Ipv6Net::new(<span class="self">self</span>.network(), <span class="self">self</span>.prefix_len).unwrap()
     }

     <span class="doccomment">/// Returns the address.
     </span><span class="attribute">#[inline]
     </span><span class="kw">pub const fn </span>addr(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; Ipv6Addr {
         <span class="self">self</span>.addr
     }

     <span class="doccomment">/// Returns the prefix length.
     </span><span class="attribute">#[inline]
     </span><span class="kw">pub const fn </span>prefix_len(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; u8 {
         <span class="self">self</span>.prefix_len
     }

     <span class="doccomment">/// Returns the maximum valid prefix length.
     </span><span class="attribute">#[inline]
     </span><span class="kw">pub const fn </span>max_prefix_len(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; u8 {
         <span class="number">128
     </span>}

     <span class="doccomment">/// Returns the network mask.
     ///
     /// # Examples
     ///
     /// ```
     /// # use std::net::Ipv6Addr;
     /// # use ipnet::Ipv6Net;
     /// #
     /// let net: Ipv6Net = &quot;fd00::/24&quot;.parse().unwrap();
     /// assert_eq!(Ok(net.netmask()), &quot;ffff:ff00::&quot;.parse());
     /// ```
     </span><span class="kw">pub fn </span>netmask(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; Ipv6Addr {
         <span class="self">self</span>.netmask_u128().into()
     }

     <span class="kw">fn </span>netmask_u128(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; u128 {
         u128::max_value().checked_shl((<span class="number">128 </span>- <span class="self">self</span>.prefix_len) <span class="kw">as </span>u32).unwrap_or(u128::min_value())
     }

     <span class="doccomment">/// Returns the host mask.
     ///
     /// # Examples
     ///
     /// ```
     /// # use std::net::Ipv6Addr;
     /// # use ipnet::Ipv6Net;
     /// #
     /// let net: Ipv6Net = &quot;fd00::/24&quot;.parse().unwrap();
     /// assert_eq!(Ok(net.hostmask()), &quot;::ff:ffff:ffff:ffff:ffff:ffff:ffff&quot;.parse());
     /// ```
     </span><span class="kw">pub fn </span>hostmask(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; Ipv6Addr {
         <span class="self">self</span>.hostmask_u128().into()
     }

     <span class="kw">fn </span>hostmask_u128(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; u128 {
         u128::max_value().checked_shr(<span class="self">self</span>.prefix_len <span class="kw">as </span>u32).unwrap_or(u128::min_value())
     }

     <span class="doccomment">/// Returns the network address.
     ///
     /// # Examples
     ///
     /// ```
     /// # use std::net::Ipv6Addr;
     /// # use ipnet::Ipv6Net;
     /// #
     /// let net: Ipv6Net = &quot;fd00:1234:5678::/24&quot;.parse().unwrap();
     /// assert_eq!(Ok(net.network()), &quot;fd00:1200::&quot;.parse());
     /// ```
     </span><span class="kw">pub fn </span>network(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; Ipv6Addr {
         (u128::from(<span class="self">self</span>.addr) &amp; <span class="self">self</span>.netmask_u128()).into()
     }

     <span class="doccomment">/// Returns the last address.
     ///
     /// Technically there is no such thing as a broadcast address for
     /// IPv6. The name is used for consistency with colloquial usage.
     ///
     /// # Examples
     ///
     /// ```
     /// # use std::net::Ipv6Addr;
     /// # use ipnet::Ipv6Net;
     /// #
     /// let net: Ipv6Net = &quot;fd00:1234:5678::/24&quot;.parse().unwrap();
     /// assert_eq!(Ok(net.broadcast()), &quot;fd00:12ff:ffff:ffff:ffff:ffff:ffff:ffff&quot;.parse());
     /// ```
     </span><span class="kw">pub fn </span>broadcast(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; Ipv6Addr {
         (u128::from(<span class="self">self</span>.addr) | <span class="self">self</span>.hostmask_u128()).into()
     }

     <span class="doccomment">/// Returns the `Ipv6Net` that contains this one.
     ///
     /// # Examples
     ///
     /// ```
     /// # use std::str::FromStr;
     /// # use ipnet::Ipv6Net;
     /// #
     /// let n1: Ipv6Net = &quot;fd00:ff00::/24&quot;.parse().unwrap();
     /// let n2: Ipv6Net = &quot;fd00:fe00::/23&quot;.parse().unwrap();
     /// let n3: Ipv6Net = &quot;fd00:fe00::/0&quot;.parse().unwrap();
     ///
     /// assert_eq!(n1.supernet().unwrap(), n2);
     /// assert_eq!(n3.supernet(), None);
     /// ```
     </span><span class="kw">pub fn </span>supernet(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; <span class="prelude-ty">Option</span>&lt;Ipv6Net&gt; {
         Ipv6Net::new(<span class="self">self</span>.addr, <span class="self">self</span>.prefix_len.wrapping_sub(<span class="number">1</span>)).map(|n| n.trunc()).ok()
     }

     <span class="doccomment">/// Returns `true` if this network and the given network are
     /// children of the same supernet.
     ///
     /// # Examples
     ///
     /// ```
     /// # use ipnet::Ipv6Net;
     /// #
     /// let n1: Ipv6Net = &quot;fd00::/18&quot;.parse().unwrap();
     /// let n2: Ipv6Net = &quot;fd00:4000::/18&quot;.parse().unwrap();
     /// let n3: Ipv6Net = &quot;fd00:8000::/18&quot;.parse().unwrap();
     ///
     /// assert!(n1.is_sibling(&amp;n2));
     /// assert!(!n2.is_sibling(&amp;n3));
     /// ```
     </span><span class="kw">pub fn </span>is_sibling(<span class="kw-2">&amp;</span><span class="self">self</span>, other: <span class="kw-2">&amp;</span>Ipv6Net) -&gt; bool {
         <span class="self">self</span>.prefix_len &gt; <span class="number">0 </span>&amp;&amp;
         <span class="self">self</span>.prefix_len == other.prefix_len &amp;&amp;
         <span class="self">self</span>.supernet().unwrap().contains(other)
     }

     <span class="doccomment">/// Return an `Iterator` over the host addresses in this network.
     ///
     /// # Examples
     ///
     /// ```
     /// # use std::net::Ipv6Addr;
     /// # use ipnet::Ipv6Net;
     /// #
     /// let net: Ipv6Net = &quot;fd00::/126&quot;.parse().unwrap();
     /// assert_eq!(net.hosts().collect::&lt;Vec&lt;Ipv6Addr&gt;&gt;(), vec![
     ///     &quot;fd00::&quot;.parse::&lt;Ipv6Addr&gt;().unwrap(),
     ///     &quot;fd00::1&quot;.parse().unwrap(),
     ///     &quot;fd00::2&quot;.parse().unwrap(),
     ///     &quot;fd00::3&quot;.parse().unwrap(),
     /// ]);
     /// ```
     </span><span class="kw">pub fn </span>hosts(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; Ipv6AddrRange {
         Ipv6AddrRange::new(<span class="self">self</span>.network(), <span class="self">self</span>.broadcast())
     }

     <span class="doccomment">/// Returns an `Iterator` over the subnets of this network with the
     /// given prefix length.
     ///
     /// # Examples
     ///
     /// ```
     /// # use ipnet::{Ipv6Net, PrefixLenError};
     /// #
     /// let net: Ipv6Net = &quot;fd00::/16&quot;.parse().unwrap();
     /// assert_eq!(net.subnets(18).unwrap().collect::&lt;Vec&lt;Ipv6Net&gt;&gt;(), vec![
     ///     &quot;fd00::/18&quot;.parse::&lt;Ipv6Net&gt;().unwrap(),
     ///     &quot;fd00:4000::/18&quot;.parse().unwrap(),
     ///     &quot;fd00:8000::/18&quot;.parse().unwrap(),
     ///     &quot;fd00:c000::/18&quot;.parse().unwrap(),
     /// ]);
     ///
     /// let net: Ipv6Net = &quot;fd00::/126&quot;.parse().unwrap();
     /// assert_eq!(net.subnets(128).unwrap().collect::&lt;Vec&lt;Ipv6Net&gt;&gt;(), vec![
     ///     &quot;fd00::/128&quot;.parse::&lt;Ipv6Net&gt;().unwrap(),
     ///     &quot;fd00::1/128&quot;.parse().unwrap(),
     ///     &quot;fd00::2/128&quot;.parse().unwrap(),
     ///     &quot;fd00::3/128&quot;.parse().unwrap(),
     /// ]);
     ///
     /// let net: Ipv6Net = &quot;fd00::/16&quot;.parse().unwrap();
     /// assert_eq!(net.subnets(15), Err(PrefixLenError));
     ///
     /// let net: Ipv6Net = &quot;fd00::/16&quot;.parse().unwrap();
     /// assert_eq!(net.subnets(129), Err(PrefixLenError));
     /// ```
     </span><span class="kw">pub fn </span>subnets(<span class="kw-2">&amp;</span><span class="self">self</span>, new_prefix_len: u8) -&gt; <span class="prelude-ty">Result</span>&lt;Ipv6Subnets, PrefixLenError&gt; {
         <span class="kw">if </span><span class="self">self</span>.prefix_len &gt; new_prefix_len || new_prefix_len &gt; <span class="number">128 </span>{
             <span class="kw">return </span><span class="prelude-val">Err</span>(PrefixLenError);
         }

         <span class="prelude-val">Ok</span>(Ipv6Subnets::new(
             <span class="self">self</span>.network(),
             <span class="self">self</span>.broadcast(),
             new_prefix_len,
         ))
     }

     <span class="doccomment">/// Test if a network address contains either another network
     /// address or an IP address.
     ///
     /// # Examples
     ///
     /// ```
     /// # use std::net::Ipv6Addr;
     /// # use ipnet::Ipv6Net;
     /// #
     /// let net: Ipv6Net = &quot;fd00::/16&quot;.parse().unwrap();
     /// let net_yes: Ipv6Net = &quot;fd00::/17&quot;.parse().unwrap();
     /// let net_no: Ipv6Net = &quot;fd00::/15&quot;.parse().unwrap();
     /// let ip_yes: Ipv6Addr = &quot;fd00::1&quot;.parse().unwrap();
     /// let ip_no: Ipv6Addr = &quot;fd01::&quot;.parse().unwrap();
     ///
     /// assert!(net.contains(&amp;net));
     /// assert!(net.contains(&amp;net_yes));
     /// assert!(!net.contains(&amp;net_no));
     /// assert!(net.contains(&amp;ip_yes));
     /// assert!(!net.contains(&amp;ip_no));
     /// ```
     </span><span class="kw">pub fn </span>contains&lt;T&gt;(<span class="kw-2">&amp;</span><span class="self">self</span>, other: T) -&gt; bool <span class="kw">where </span><span class="self">Self</span>: Contains&lt;T&gt; {
         Contains::contains(<span class="self">self</span>, other)
     }

     <span class="comment">// It is significantly faster to work on u128 that Ipv6Addr.
     </span><span class="kw">fn </span>interval(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; (u128, u128) {
         (
             u128::from(<span class="self">self</span>.network()),
             u128::from(<span class="self">self</span>.broadcast()).saturating_add(<span class="number">1</span>),
         )
     }

     <span class="doccomment">/// Aggregate a `Vec` of `Ipv6Net`s and return the result as a new
     /// `Vec`.
     ///
     /// # Examples
     ///
     /// ```
     /// # use ipnet::Ipv6Net;
     /// #
     /// let nets = vec![
     ///     &quot;fd00::/18&quot;.parse::&lt;Ipv6Net&gt;().unwrap(),
     ///     &quot;fd00:4000::/18&quot;.parse().unwrap(),
     ///     &quot;fd00:8000::/18&quot;.parse().unwrap(),
     /// ];
     /// assert_eq!(Ipv6Net::aggregate(&amp;nets), vec![
     ///     &quot;fd00::/17&quot;.parse::&lt;Ipv6Net&gt;().unwrap(),
     ///     &quot;fd00:8000::/18&quot;.parse().unwrap(),
     /// ]);
     /// ```
     </span><span class="kw">pub fn </span>aggregate(networks: <span class="kw-2">&amp;</span>Vec&lt;Ipv6Net&gt;) -&gt; Vec&lt;Ipv6Net&gt; {
         <span class="kw">let </span><span class="kw-2">mut </span>intervals: Vec&lt;(<span class="kw">_</span>, <span class="kw">_</span>)&gt; = networks.iter().map(|n| n.interval()).collect();
         intervals = merge_intervals(intervals);
         <span class="kw">let </span><span class="kw-2">mut </span>res: Vec&lt;Ipv6Net&gt; = Vec::new();

         <span class="kw">for </span>(start, <span class="kw-2">mut </span>end) <span class="kw">in </span>intervals {
             <span class="kw">if </span>end != std::u128::MAX {
                 end = end.saturating_sub(<span class="number">1</span>)
             }
             <span class="kw">let </span>iter = Ipv6Subnets::new(start.into(), end.into(), <span class="number">0</span>);
             res.extend(iter);
         }
         res
     }
 }

 <span class="kw">impl </span>Default <span class="kw">for </span>Ipv6Net {
     <span class="kw">fn </span>default() -&gt; <span class="self">Self </span>{
         <span class="self">Self </span>{
             addr: Ipv6Addr::from(<span class="number">0</span>),
             prefix_len: <span class="number">0</span>,
         }
     }
 }

 <span class="kw">impl </span>fmt::Debug <span class="kw">for </span>Ipv6Net {
     <span class="kw">fn </span>fmt(<span class="kw-2">&amp;</span><span class="self">self</span>, fmt: <span class="kw-2">&amp;mut </span>fmt::Formatter) -&gt; fmt::Result {
         fmt::Display::fmt(<span class="self">self</span>, fmt)
     }
 }

 <span class="kw">impl </span>fmt::Display <span class="kw">for </span>Ipv6Net {
     <span class="kw">fn </span>fmt(<span class="kw-2">&amp;</span><span class="self">self</span>, fmt: <span class="kw-2">&amp;mut </span>fmt::Formatter) -&gt; fmt::Result {
         <span class="macro">write!</span>(fmt, <span class="string">&quot;{}/{}&quot;</span>, <span class="self">self</span>.addr, <span class="self">self</span>.prefix_len)
     }
 }

 <span class="kw">impl </span>From&lt;Ipv6Addr&gt; <span class="kw">for </span>Ipv6Net {
     <span class="kw">fn </span>from(addr: Ipv6Addr) -&gt; Ipv6Net {
         Ipv6Net { addr, prefix_len: <span class="number">128 </span>}
     }
 }

 <span class="doccomment">/// Provides a method to test if a network address contains either
 /// another network address or an IP address.
 ///
 /// # Examples
 ///
 /// ```
 /// # use std::net::IpAddr;
 /// # use ipnet::IpNet;
 /// #
 /// let n4_1: IpNet = &quot;10.1.1.0/24&quot;.parse().unwrap();
 /// let n4_2: IpNet = &quot;10.1.1.0/26&quot;.parse().unwrap();
 /// let n4_3: IpNet = &quot;10.1.2.0/26&quot;.parse().unwrap();
 /// let ip4_1: IpAddr = &quot;10.1.1.1&quot;.parse().unwrap();
 /// let ip4_2: IpAddr = &quot;10.1.2.1&quot;.parse().unwrap();
 ///
 /// let n6_1: IpNet = &quot;fd00::/16&quot;.parse().unwrap();
 /// let n6_2: IpNet = &quot;fd00::/17&quot;.parse().unwrap();
 /// let n6_3: IpNet = &quot;fd01::/17&quot;.parse().unwrap();
 /// let ip6_1: IpAddr = &quot;fd00::1&quot;.parse().unwrap();
 /// let ip6_2: IpAddr = &quot;fd01::1&quot;.parse().unwrap();
 ///
 /// assert!(n4_1.contains(&amp;n4_2));
 /// assert!(!n4_1.contains(&amp;n4_3));
 /// assert!(n4_1.contains(&amp;ip4_1));
 /// assert!(!n4_1.contains(&amp;ip4_2));
 ///
 /// assert!(n6_1.contains(&amp;n6_2));
 /// assert!(!n6_1.contains(&amp;n6_3));
 /// assert!(n6_1.contains(&amp;ip6_1));
 /// assert!(!n6_1.contains(&amp;ip6_2));
 ///
 /// assert!(!n4_1.contains(&amp;n6_1) &amp;&amp; !n6_1.contains(&amp;n4_1));
 /// assert!(!n4_1.contains(&amp;ip6_1) &amp;&amp; !n6_1.contains(&amp;ip4_1));
 /// ```
 </span><span class="kw">pub trait </span>Contains&lt;T&gt; {
     <span class="kw">fn </span>contains(<span class="kw-2">&amp;</span><span class="self">self</span>, other: T) -&gt; bool;
 }

 <span class="kw">impl</span>&lt;<span class="lifetime">&#39;a</span>&gt; Contains&lt;<span class="kw-2">&amp;</span><span class="lifetime">&#39;a </span>IpNet&gt; <span class="kw">for </span>IpNet {
     <span class="kw">fn </span>contains(<span class="kw-2">&amp;</span><span class="self">self</span>, other: <span class="kw-2">&amp;</span>IpNet) -&gt; bool {
         <span class="kw">match </span>(<span class="kw-2">*</span><span class="self">self</span>, <span class="kw-2">*</span>other) {
             (IpNet::V4(<span class="kw-2">ref </span>a), IpNet::V4(<span class="kw-2">ref </span>b)) =&gt; a.contains(b),
             (IpNet::V6(<span class="kw-2">ref </span>a), IpNet::V6(<span class="kw-2">ref </span>b)) =&gt; a.contains(b),
             <span class="kw">_ </span>=&gt; <span class="bool-val">false</span>,
         }
     }
 }

 <span class="kw">impl</span>&lt;<span class="lifetime">&#39;a</span>&gt; Contains&lt;<span class="kw-2">&amp;</span><span class="lifetime">&#39;a </span>IpAddr&gt; <span class="kw">for </span>IpNet {
     <span class="kw">fn </span>contains(<span class="kw-2">&amp;</span><span class="self">self</span>, other: <span class="kw-2">&amp;</span>IpAddr) -&gt; bool {
         <span class="kw">match </span>(<span class="kw-2">*</span><span class="self">self</span>, <span class="kw-2">*</span>other) {
             (IpNet::V4(<span class="kw-2">ref </span>a), IpAddr::V4(<span class="kw-2">ref </span>b)) =&gt; a.contains(b),
             (IpNet::V6(<span class="kw-2">ref </span>a), IpAddr::V6(<span class="kw-2">ref </span>b)) =&gt; a.contains(b),
             <span class="kw">_ </span>=&gt; <span class="bool-val">false</span>,
         }
     }
 }

 <span class="kw">impl</span>&lt;<span class="lifetime">&#39;a</span>&gt; Contains&lt;<span class="kw-2">&amp;</span><span class="lifetime">&#39;a </span>Ipv4Net&gt; <span class="kw">for </span>Ipv4Net {
     <span class="kw">fn </span>contains(<span class="kw-2">&amp;</span><span class="self">self</span>, other: <span class="kw-2">&amp;</span><span class="lifetime">&#39;a </span>Ipv4Net) -&gt; bool {
         <span class="self">self</span>.network() &lt;= other.network() &amp;&amp; other.broadcast() &lt;= <span class="self">self</span>.broadcast()
     }
 }

 <span class="kw">impl</span>&lt;<span class="lifetime">&#39;a</span>&gt; Contains&lt;<span class="kw-2">&amp;</span><span class="lifetime">&#39;a </span>Ipv4Addr&gt; <span class="kw">for </span>Ipv4Net {
     <span class="kw">fn </span>contains(<span class="kw-2">&amp;</span><span class="self">self</span>, other: <span class="kw-2">&amp;</span><span class="lifetime">&#39;a </span>Ipv4Addr) -&gt; bool {
         <span class="self">self</span>.network() &lt;= <span class="kw-2">*</span>other &amp;&amp; <span class="kw-2">*</span>other &lt;= <span class="self">self</span>.broadcast()
     }
 }

 <span class="kw">impl</span>&lt;<span class="lifetime">&#39;a</span>&gt; Contains&lt;<span class="kw-2">&amp;</span><span class="lifetime">&#39;a </span>Ipv6Net&gt; <span class="kw">for </span>Ipv6Net {
     <span class="kw">fn </span>contains(<span class="kw-2">&amp;</span><span class="self">self</span>, other: <span class="kw-2">&amp;</span><span class="lifetime">&#39;a </span>Ipv6Net) -&gt; bool {
         <span class="self">self</span>.network() &lt;= other.network() &amp;&amp; other.broadcast() &lt;= <span class="self">self</span>.broadcast()
     }
 }

 <span class="kw">impl</span>&lt;<span class="lifetime">&#39;a</span>&gt; Contains&lt;<span class="kw-2">&amp;</span><span class="lifetime">&#39;a </span>Ipv6Addr&gt; <span class="kw">for </span>Ipv6Net {
     <span class="kw">fn </span>contains(<span class="kw-2">&amp;</span><span class="self">self</span>, other: <span class="kw-2">&amp;</span><span class="lifetime">&#39;a </span>Ipv6Addr) -&gt; bool {
         <span class="self">self</span>.network() &lt;= <span class="kw-2">*</span>other &amp;&amp; <span class="kw-2">*</span>other &lt;= <span class="self">self</span>.broadcast()
     }
 }

 <span class="doccomment">/// An `Iterator` that generates IP network addresses, either IPv4 or
 /// IPv6.
 ///
 /// Generates the subnets between the provided `start` and `end` IP
 /// addresses inclusive of `end`. Each iteration generates the next
 /// network address of the largest valid size it can, while using a
 /// prefix length not less than `min_prefix_len`.
 ///
 /// # Examples
 ///
 /// ```
 /// # use std::net::{Ipv4Addr, Ipv6Addr};
 /// # use std::str::FromStr;
 /// # use ipnet::{IpNet, IpSubnets, Ipv4Subnets, Ipv6Subnets};
 /// let subnets = IpSubnets::from(Ipv4Subnets::new(
 ///     &quot;10.0.0.0&quot;.parse().unwrap(),
 ///     &quot;10.0.0.239&quot;.parse().unwrap(),
 ///     26,
 /// ));
 ///
 /// assert_eq!(subnets.collect::&lt;Vec&lt;IpNet&gt;&gt;(), vec![
 ///     &quot;10.0.0.0/26&quot;.parse().unwrap(),
 ///     &quot;10.0.0.64/26&quot;.parse().unwrap(),
 ///     &quot;10.0.0.128/26&quot;.parse().unwrap(),
 ///     &quot;10.0.0.192/27&quot;.parse().unwrap(),
 ///     &quot;10.0.0.224/28&quot;.parse().unwrap(),
 /// ]);
 ///
 /// let subnets = IpSubnets::from(Ipv6Subnets::new(
 ///     &quot;fd00::&quot;.parse().unwrap(),
 ///     &quot;fd00:ef:ffff:ffff:ffff:ffff:ffff:ffff&quot;.parse().unwrap(),
 ///     26,
 /// ));
 ///
 /// assert_eq!(subnets.collect::&lt;Vec&lt;IpNet&gt;&gt;(), vec![
 ///     &quot;fd00::/26&quot;.parse().unwrap(),
 ///     &quot;fd00:40::/26&quot;.parse().unwrap(),
 ///     &quot;fd00:80::/26&quot;.parse().unwrap(),
 ///     &quot;fd00:c0::/27&quot;.parse().unwrap(),
 ///     &quot;fd00:e0::/28&quot;.parse().unwrap(),
 /// ]);
 /// ```
 </span><span class="attribute">#[derive(Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Hash, Debug)]
 </span><span class="kw">pub enum </span>IpSubnets {
     V4(Ipv4Subnets),
     V6(Ipv6Subnets),
 }

 <span class="doccomment">/// An `Iterator` that generates IPv4 network addresses.
 ///
 /// Generates the subnets between the provided `start` and `end` IP
 /// addresses inclusive of `end`. Each iteration generates the next
 /// network address of the largest valid size it can, while using a
 /// prefix length not less than `min_prefix_len`.
 ///
 /// # Examples
 ///
 /// ```
 /// # use std::net::Ipv4Addr;
 /// # use std::str::FromStr;
 /// # use ipnet::{Ipv4Net, Ipv4Subnets};
 /// let subnets = Ipv4Subnets::new(
 ///     &quot;10.0.0.0&quot;.parse().unwrap(),
 ///     &quot;10.0.0.239&quot;.parse().unwrap(),
 ///     26,
 /// );
 ///
 /// assert_eq!(subnets.collect::&lt;Vec&lt;Ipv4Net&gt;&gt;(), vec![
 ///     &quot;10.0.0.0/26&quot;.parse().unwrap(),
 ///     &quot;10.0.0.64/26&quot;.parse().unwrap(),
 ///     &quot;10.0.0.128/26&quot;.parse().unwrap(),
 ///     &quot;10.0.0.192/27&quot;.parse().unwrap(),
 ///     &quot;10.0.0.224/28&quot;.parse().unwrap(),
 /// ]);
 /// ```
 </span><span class="attribute">#[derive(Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Hash, Debug)]
 </span><span class="kw">pub struct </span>Ipv4Subnets {
     start: Ipv4Addr,
     end: Ipv4Addr, <span class="comment">// end is inclusive
     </span>min_prefix_len: u8,
 }

 <span class="doccomment">/// An `Iterator` that generates IPv6 network addresses.
 ///
 /// Generates the subnets between the provided `start` and `end` IP
 /// addresses inclusive of `end`. Each iteration generates the next
 /// network address of the largest valid size it can, while using a
 /// prefix length not less than `min_prefix_len`.
 ///
 /// # Examples
 ///
 /// ```
 /// # use std::net::Ipv6Addr;
 /// # use std::str::FromStr;
 /// # use ipnet::{Ipv6Net, Ipv6Subnets};
 /// let subnets = Ipv6Subnets::new(
 ///     &quot;fd00::&quot;.parse().unwrap(),
 ///     &quot;fd00:ef:ffff:ffff:ffff:ffff:ffff:ffff&quot;.parse().unwrap(),
 ///     26,
 /// );
 ///
 /// assert_eq!(subnets.collect::&lt;Vec&lt;Ipv6Net&gt;&gt;(), vec![
 ///     &quot;fd00::/26&quot;.parse().unwrap(),
 ///     &quot;fd00:40::/26&quot;.parse().unwrap(),
 ///     &quot;fd00:80::/26&quot;.parse().unwrap(),
 ///     &quot;fd00:c0::/27&quot;.parse().unwrap(),
 ///     &quot;fd00:e0::/28&quot;.parse().unwrap(),
 /// ]);
 /// ```
 </span><span class="attribute">#[derive(Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Hash, Debug)]
 </span><span class="kw">pub struct </span>Ipv6Subnets {
     start: Ipv6Addr,
     end: Ipv6Addr, <span class="comment">// end is inclusive
     </span>min_prefix_len: u8,
 }

 <span class="kw">impl </span>Ipv4Subnets {
     <span class="kw">pub fn </span>new(start: Ipv4Addr, end: Ipv4Addr, min_prefix_len: u8) -&gt; <span class="self">Self </span>{
         Ipv4Subnets {
             start: start,
             end: end,
             min_prefix_len: min_prefix_len,
         }
     }
 }

 <span class="kw">impl </span>Ipv6Subnets {
     <span class="kw">pub fn </span>new(start: Ipv6Addr, end: Ipv6Addr, min_prefix_len: u8) -&gt; <span class="self">Self </span>{
         Ipv6Subnets {
             start: start,
             end: end,
             min_prefix_len: min_prefix_len,
         }
     }
 }

 <span class="kw">impl </span>From&lt;Ipv4Subnets&gt; <span class="kw">for </span>IpSubnets {
     <span class="kw">fn </span>from(i: Ipv4Subnets) -&gt; IpSubnets {
         IpSubnets::V4(i)
     }
 }

 <span class="kw">impl </span>From&lt;Ipv6Subnets&gt; <span class="kw">for </span>IpSubnets {
     <span class="kw">fn </span>from(i: Ipv6Subnets) -&gt; IpSubnets {
         IpSubnets::V6(i)
     }
 }

 <span class="kw">impl </span>Iterator <span class="kw">for </span>IpSubnets {
     <span class="kw">type </span>Item = IpNet;

     <span class="kw">fn </span>next(<span class="kw-2">&amp;mut </span><span class="self">self</span>) -&gt; <span class="prelude-ty">Option</span>&lt;<span class="self">Self</span>::Item&gt; {
         <span class="kw">match </span><span class="kw-2">*</span><span class="self">self </span>{
             IpSubnets::V4(<span class="kw-2">ref mut </span>a) =&gt; a.next().map(IpNet::V4),
             IpSubnets::V6(<span class="kw-2">ref mut </span>a) =&gt; a.next().map(IpNet::V6),
         }
     }
 }

 <span class="kw">fn </span>next_ipv4_subnet(start: Ipv4Addr, end: Ipv4Addr, min_prefix_len: u8) -&gt; Ipv4Net {
     <span class="kw">let </span>range = end.saturating_sub(start).saturating_add(<span class="number">1</span>);
     <span class="kw">if </span>range == std::u32::MAX &amp;&amp; min_prefix_len == <span class="number">0 </span>{
         Ipv4Net::new(start, min_prefix_len).unwrap()
     }
     <span class="kw">else </span>{
         <span class="kw">let </span>range_bits = <span class="number">32u32</span>.saturating_sub(range.leading_zeros()).saturating_sub(<span class="number">1</span>);
         <span class="kw">let </span>start_tz = u32::from(start).trailing_zeros();
         <span class="kw">let </span>new_prefix_len = <span class="number">32 </span>- min(range_bits, start_tz);
         <span class="kw">let </span>next_prefix_len = max(new_prefix_len <span class="kw">as </span>u8, min_prefix_len);
         Ipv4Net::new(start, next_prefix_len).unwrap()
     }
 }

 <span class="kw">fn </span>next_ipv6_subnet(start: Ipv6Addr, end: Ipv6Addr, min_prefix_len: u8) -&gt; Ipv6Net {
     <span class="kw">let </span>range = end.saturating_sub(start).saturating_add(<span class="number">1</span>);
     <span class="kw">if </span>range == std::u128::MAX &amp;&amp; min_prefix_len == <span class="number">0 </span>{
         Ipv6Net::new(start, min_prefix_len).unwrap()
     }
     <span class="kw">else </span>{
         <span class="kw">let </span>range = end.saturating_sub(start).saturating_add(<span class="number">1</span>);
         <span class="kw">let </span>range_bits = <span class="number">128u32</span>.saturating_sub(range.leading_zeros()).saturating_sub(<span class="number">1</span>);
         <span class="kw">let </span>start_tz = u128::from(start).trailing_zeros();
         <span class="kw">let </span>new_prefix_len = <span class="number">128 </span>- min(range_bits, start_tz);
         <span class="kw">let </span>next_prefix_len = max(new_prefix_len <span class="kw">as </span>u8, min_prefix_len);
         Ipv6Net::new(start, next_prefix_len).unwrap()
     }
 }

 <span class="kw">impl </span>Iterator <span class="kw">for </span>Ipv4Subnets {
     <span class="kw">type </span>Item = Ipv4Net;

     <span class="kw">fn </span>next(<span class="kw-2">&amp;mut </span><span class="self">self</span>) -&gt; <span class="prelude-ty">Option</span>&lt;<span class="self">Self</span>::Item&gt; {
         <span class="kw">match </span><span class="self">self</span>.start.partial_cmp(<span class="kw-2">&amp;</span><span class="self">self</span>.end) {
             <span class="prelude-val">Some</span>(Less) =&gt; {
                 <span class="kw">let </span>next = next_ipv4_subnet(<span class="self">self</span>.start, <span class="self">self</span>.end, <span class="self">self</span>.min_prefix_len);
                 <span class="self">self</span>.start = next.broadcast().saturating_add(<span class="number">1</span>);

                 <span class="comment">// Stop the iterator if we saturated self.start. This
                 // check worsens performance slightly but overall this
                 // approach of operating on Ipv4Addr types is faster
                 // than what we were doing before using Ipv4Net.
                 </span><span class="kw">if </span><span class="self">self</span>.start == next.broadcast() {
                     <span class="self">self</span>.end.replace_zero();
                 }
                 <span class="prelude-val">Some</span>(next)
             },
             <span class="prelude-val">Some</span>(Equal) =&gt; {
                 <span class="kw">let </span>next = next_ipv4_subnet(<span class="self">self</span>.start, <span class="self">self</span>.end, <span class="self">self</span>.min_prefix_len);
                 <span class="self">self</span>.start = next.broadcast().saturating_add(<span class="number">1</span>);
                 <span class="self">self</span>.end.replace_zero();
                 <span class="prelude-val">Some</span>(next)
             },
             <span class="kw">_ </span>=&gt; <span class="prelude-val">None</span>,
         }
     }
 }

 <span class="kw">impl </span>Iterator <span class="kw">for </span>Ipv6Subnets {
     <span class="kw">type </span>Item = Ipv6Net;

     <span class="kw">fn </span>next(<span class="kw-2">&amp;mut </span><span class="self">self</span>) -&gt; <span class="prelude-ty">Option</span>&lt;<span class="self">Self</span>::Item&gt; {
         <span class="kw">match </span><span class="self">self</span>.start.partial_cmp(<span class="kw-2">&amp;</span><span class="self">self</span>.end) {
             <span class="prelude-val">Some</span>(Less) =&gt; {
                 <span class="kw">let </span>next = next_ipv6_subnet(<span class="self">self</span>.start, <span class="self">self</span>.end, <span class="self">self</span>.min_prefix_len);
                 <span class="self">self</span>.start = next.broadcast().saturating_add(<span class="number">1</span>);

                 <span class="comment">// Stop the iterator if we saturated self.start. This
                 // check worsens performance slightly but overall this
                 // approach of operating on Ipv6Addr types is faster
                 // than what we were doing before using Ipv6Net.
                 </span><span class="kw">if </span><span class="self">self</span>.start == next.broadcast() {
                     <span class="self">self</span>.end.replace_zero();
                 }
                 <span class="prelude-val">Some</span>(next)
             },
             <span class="prelude-val">Some</span>(Equal) =&gt; {
                 <span class="kw">let </span>next = next_ipv6_subnet(<span class="self">self</span>.start, <span class="self">self</span>.end, <span class="self">self</span>.min_prefix_len);
                 <span class="self">self</span>.start = next.broadcast().saturating_add(<span class="number">1</span>);
                 <span class="self">self</span>.end.replace_zero();
                 <span class="prelude-val">Some</span>(next)
             },
             <span class="kw">_ </span>=&gt; <span class="prelude-val">None</span>,
         }
     }
 }

 <span class="kw">impl </span>FusedIterator <span class="kw">for </span>IpSubnets {}
 <span class="kw">impl </span>FusedIterator <span class="kw">for </span>Ipv4Subnets {}
 <span class="kw">impl </span>FusedIterator <span class="kw">for </span>Ipv6Subnets {}

 <span class="comment">// Generic function for merging a vector of intervals.
 </span><span class="kw">fn </span>merge_intervals&lt;T: Copy + Ord&gt;(<span class="kw-2">mut </span>intervals: Vec&lt;(T, T)&gt;) -&gt; Vec&lt;(T, T)&gt; {
     <span class="kw">if </span>intervals.len() == <span class="number">0 </span>{
         <span class="kw">return </span>intervals;
     }

     intervals.sort();
     <span class="kw">let </span><span class="kw-2">mut </span>res: Vec&lt;(T, T)&gt; = Vec::new();
     <span class="kw">let </span>(<span class="kw-2">mut </span>start, <span class="kw-2">mut </span>end) = intervals[<span class="number">0</span>];

     <span class="kw">let </span><span class="kw-2">mut </span>i = <span class="number">1</span>;
     <span class="kw">let </span>len = intervals.len();
     <span class="kw">while </span>i &lt; len {
         <span class="kw">let </span>(next_start, next_end) = intervals[i];
         <span class="kw">if </span>end &gt;= next_start {
             start = min(start, next_start);
             end = max(end, next_end);
         }
         <span class="kw">else </span>{
             res.push((start, end));
             start = next_start;
             end = next_end;
         }
         i += <span class="number">1</span>;
     }

     res.push((start, end));
     res
 }

 <span class="attribute">#[cfg(test)]
 </span><span class="kw">mod </span>tests {
     <span class="kw">use super</span>::<span class="kw-2">*</span>;

     <span class="macro">macro_rules! </span>make_ipnet_vec {
         ($(<span class="macro-nonterminal">$x</span>:expr),<span class="kw-2">*</span>) =&gt; ( <span class="macro">vec!</span>[$(<span class="macro-nonterminal">$x</span>.parse::&lt;IpNet&gt;().unwrap(),)<span class="kw-2">*</span>] );
         ($(<span class="macro-nonterminal">$x</span>:expr,)<span class="kw-2">*</span>) =&gt; ( <span class="macro">make_ipnet_vec!</span>[$(<span class="macro-nonterminal">$x</span>),<span class="kw-2">*</span>] );
     }

     <span class="attribute">#[test]
     </span><span class="kw">fn </span>test_make_ipnet_vec() {
         <span class="macro">assert_eq!</span>(
             <span class="macro">make_ipnet_vec!</span>[
                 <span class="string">&quot;10.1.1.1/32&quot;</span>, <span class="string">&quot;10.2.2.2/24&quot;</span>, <span class="string">&quot;10.3.3.3/16&quot;</span>,
                 <span class="string">&quot;fd00::1/128&quot;</span>, <span class="string">&quot;fd00::2/127&quot;</span>, <span class="string">&quot;fd00::3/126&quot;</span>,
             ],
             <span class="macro">vec!</span>[
                 <span class="string">&quot;10.1.1.1/32&quot;</span>.parse().unwrap(),
                 <span class="string">&quot;10.2.2.2/24&quot;</span>.parse().unwrap(),
                 <span class="string">&quot;10.3.3.3/16&quot;</span>.parse().unwrap(),
                 <span class="string">&quot;fd00::1/128&quot;</span>.parse().unwrap(),
                 <span class="string">&quot;fd00::2/127&quot;</span>.parse().unwrap(),
                 <span class="string">&quot;fd00::3/126&quot;</span>.parse().unwrap(),
             ]
         );
     }

     <span class="attribute">#[test]
     </span><span class="kw">fn </span>test_merge_intervals() {
         <span class="kw">let </span>v = <span class="macro">vec!</span>[
             (<span class="number">0</span>, <span class="number">1</span>), (<span class="number">1</span>, <span class="number">2</span>), (<span class="number">2</span>, <span class="number">3</span>),
             (<span class="number">11</span>, <span class="number">12</span>), (<span class="number">13</span>, <span class="number">14</span>), (<span class="number">10</span>, <span class="number">15</span>), (<span class="number">11</span>, <span class="number">13</span>),
             (<span class="number">20</span>, <span class="number">25</span>), (<span class="number">24</span>, <span class="number">29</span>),
         ];

         <span class="kw">let </span>v_ok = <span class="macro">vec!</span>[
             (<span class="number">0</span>, <span class="number">3</span>),
             (<span class="number">10</span>, <span class="number">15</span>),
             (<span class="number">20</span>, <span class="number">29</span>),
         ];

         <span class="kw">let </span>vv = <span class="macro">vec!</span>[
             ([<span class="number">0</span>, <span class="number">1</span>], [<span class="number">0</span>, <span class="number">2</span>]), ([<span class="number">0</span>, <span class="number">2</span>], [<span class="number">0</span>, <span class="number">3</span>]), ([<span class="number">0</span>, <span class="number">0</span>], [<span class="number">0</span>, <span class="number">1</span>]),
             ([<span class="number">10</span>, <span class="number">15</span>], [<span class="number">11</span>, <span class="number">0</span>]), ([<span class="number">10</span>, <span class="number">0</span>], [<span class="number">10</span>, <span class="number">16</span>]),
         ];

         <span class="kw">let </span>vv_ok = <span class="macro">vec!</span>[
             ([<span class="number">0</span>, <span class="number">0</span>], [<span class="number">0</span>, <span class="number">3</span>]),
             ([<span class="number">10</span>, <span class="number">0</span>], [<span class="number">11</span>, <span class="number">0</span>]),
         ];

         <span class="macro">assert_eq!</span>(merge_intervals(v), v_ok);
         <span class="macro">assert_eq!</span>(merge_intervals(vv), vv_ok);
     }

     <span class="macro">macro_rules! </span>make_ipv4_subnets_test {
         (<span class="macro-nonterminal">$name</span>:ident, <span class="macro-nonterminal">$start</span>:expr, <span class="macro-nonterminal">$end</span>:expr, <span class="macro-nonterminal">$min_prefix_len</span>:expr, $(<span class="macro-nonterminal">$x</span>:expr),<span class="kw-2">*</span>) =&gt; (
             <span class="attribute">#[test]
             </span><span class="kw">fn </span><span class="macro-nonterminal">$name</span>() {
                 <span class="kw">let </span>subnets = IpSubnets::from(Ipv4Subnets::new(
                     <span class="macro-nonterminal">$start</span>.parse().unwrap(),
                     <span class="macro-nonterminal">$end</span>.parse().unwrap(),
                     <span class="macro-nonterminal">$min_prefix_len</span>,
                 ));
                 <span class="kw">let </span>results = <span class="macro">make_ipnet_vec!</span>[$(<span class="macro-nonterminal">$x</span>),<span class="kw-2">*</span>];
                 <span class="macro">assert_eq!</span>(subnets.collect::&lt;Vec&lt;IpNet&gt;&gt;(), results);
             }
         );
         (<span class="macro-nonterminal">$name</span>:ident, <span class="macro-nonterminal">$start</span>:expr, <span class="macro-nonterminal">$end</span>:expr, <span class="macro-nonterminal">$min_prefix_len</span>:expr, $(<span class="macro-nonterminal">$x</span>:expr,)<span class="kw-2">*</span>) =&gt; (
             <span class="macro">make_ipv4_subnets_test!</span>(<span class="macro-nonterminal">$name</span>, <span class="macro-nonterminal">$start</span>, <span class="macro-nonterminal">$end</span>, <span class="macro-nonterminal">$min_prefix_len</span>, $(<span class="macro-nonterminal">$x</span>),<span class="kw-2">*</span>);
         );
     }

     <span class="macro">macro_rules! </span>make_ipv6_subnets_test {
         (<span class="macro-nonterminal">$name</span>:ident, <span class="macro-nonterminal">$start</span>:expr, <span class="macro-nonterminal">$end</span>:expr, <span class="macro-nonterminal">$min_prefix_len</span>:expr, $(<span class="macro-nonterminal">$x</span>:expr),<span class="kw-2">*</span>) =&gt; (
             <span class="attribute">#[test]
             </span><span class="kw">fn </span><span class="macro-nonterminal">$name</span>() {
                 <span class="kw">let </span>subnets = IpSubnets::from(Ipv6Subnets::new(
                     <span class="macro-nonterminal">$start</span>.parse().unwrap(),
                     <span class="macro-nonterminal">$end</span>.parse().unwrap(),
                     <span class="macro-nonterminal">$min_prefix_len</span>,
                 ));
                 <span class="kw">let </span>results = <span class="macro">make_ipnet_vec!</span>[$(<span class="macro-nonterminal">$x</span>),<span class="kw-2">*</span>];
                 <span class="macro">assert_eq!</span>(subnets.collect::&lt;Vec&lt;IpNet&gt;&gt;(), results);
             }
         );
         (<span class="macro-nonterminal">$name</span>:ident, <span class="macro-nonterminal">$start</span>:expr, <span class="macro-nonterminal">$end</span>:expr, <span class="macro-nonterminal">$min_prefix_len</span>:expr, $(<span class="macro-nonterminal">$x</span>:expr,)<span class="kw-2">*</span>) =&gt; (
             <span class="macro">make_ipv6_subnets_test!</span>(<span class="macro-nonterminal">$name</span>, <span class="macro-nonterminal">$start</span>, <span class="macro-nonterminal">$end</span>, <span class="macro-nonterminal">$min_prefix_len</span>, $(<span class="macro-nonterminal">$x</span>),<span class="kw-2">*</span>);
         );
     }

     <span class="macro">make_ipv4_subnets_test!</span>(
         test_ipv4_subnets_zero_zero,
         <span class="string">&quot;0.0.0.0&quot;</span>, <span class="string">&quot;0.0.0.0&quot;</span>, <span class="number">0</span>,
         <span class="string">&quot;0.0.0.0/32&quot;</span>,
     );

     <span class="macro">make_ipv4_subnets_test!</span>(
         test_ipv4_subnets_zero_max,
         <span class="string">&quot;0.0.0.0&quot;</span>, <span class="string">&quot;255.255.255.255&quot;</span>, <span class="number">0</span>,
         <span class="string">&quot;0.0.0.0/0&quot;</span>,
     );

     <span class="macro">make_ipv4_subnets_test!</span>(
         test_ipv4_subnets_max_max,
         <span class="string">&quot;255.255.255.255&quot;</span>, <span class="string">&quot;255.255.255.255&quot;</span>, <span class="number">0</span>,
         <span class="string">&quot;255.255.255.255/32&quot;</span>,
     );

     <span class="macro">make_ipv4_subnets_test!</span>(
         test_ipv4_subnets_none,
         <span class="string">&quot;0.0.0.1&quot;</span>, <span class="string">&quot;0.0.0.0&quot;</span>, <span class="number">0</span>,
     );

     <span class="macro">make_ipv4_subnets_test!</span>(
         test_ipv4_subnets_one,
         <span class="string">&quot;0.0.0.0&quot;</span>, <span class="string">&quot;0.0.0.1&quot;</span>, <span class="number">0</span>,
         <span class="string">&quot;0.0.0.0/31&quot;</span>,
     );

     <span class="macro">make_ipv4_subnets_test!</span>(
         test_ipv4_subnets_two,
         <span class="string">&quot;0.0.0.0&quot;</span>, <span class="string">&quot;0.0.0.2&quot;</span>, <span class="number">0</span>,
         <span class="string">&quot;0.0.0.0/31&quot;</span>,
         <span class="string">&quot;0.0.0.2/32&quot;</span>,
     );

     <span class="macro">make_ipv4_subnets_test!</span>(
         test_ipv4_subnets_taper,
         <span class="string">&quot;0.0.0.0&quot;</span>, <span class="string">&quot;0.0.0.10&quot;</span>, <span class="number">30</span>,
         <span class="string">&quot;0.0.0.0/30&quot;</span>,
         <span class="string">&quot;0.0.0.4/30&quot;</span>,
         <span class="string">&quot;0.0.0.8/31&quot;</span>,
         <span class="string">&quot;0.0.0.10/32&quot;</span>,
     );

     <span class="macro">make_ipv6_subnets_test!</span>(
         test_ipv6_subnets_zero_zero,
         <span class="string">&quot;::&quot;</span>, <span class="string">&quot;::&quot;</span>, <span class="number">0</span>,
         <span class="string">&quot;::/128&quot;</span>,
     );

     <span class="macro">make_ipv6_subnets_test!</span>(
         test_ipv6_subnets_zero_max,
         <span class="string">&quot;::&quot;</span>, <span class="string">&quot;ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff&quot;</span>, <span class="number">0</span>,
         <span class="string">&quot;::/0&quot;</span>,
     );

     <span class="macro">make_ipv6_subnets_test!</span>(
         test_ipv6_subnets_max_max,
         <span class="string">&quot;ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff&quot;</span>, <span class="string">&quot;ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff&quot;</span>, <span class="number">0</span>,
         <span class="string">&quot;ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff/128&quot;</span>,
     );

     <span class="macro">make_ipv6_subnets_test!</span>(
         test_ipv6_subnets_none,
         <span class="string">&quot;::1&quot;</span>, <span class="string">&quot;::&quot;</span>, <span class="number">0</span>,
     );

     <span class="macro">make_ipv6_subnets_test!</span>(
         test_ipv6_subnets_one,
         <span class="string">&quot;::&quot;</span>, <span class="string">&quot;::1&quot;</span>, <span class="number">0</span>,
         <span class="string">&quot;::/127&quot;</span>,
     );

     <span class="macro">make_ipv6_subnets_test!</span>(
         test_ipv6_subnets_two,
         <span class="string">&quot;::&quot;</span>, <span class="string">&quot;::2&quot;</span>, <span class="number">0</span>,
         <span class="string">&quot;::/127&quot;</span>,
         <span class="string">&quot;::2/128&quot;</span>,
     );

     <span class="macro">make_ipv6_subnets_test!</span>(
         test_ipv6_subnets_taper,
         <span class="string">&quot;::&quot;</span>, <span class="string">&quot;::a&quot;</span>, <span class="number">126</span>,
         <span class="string">&quot;::/126&quot;</span>,
         <span class="string">&quot;::4/126&quot;</span>,
         <span class="string">&quot;::8/127&quot;</span>,
         <span class="string">&quot;::a/128&quot;</span>,
     );

     <span class="attribute">#[test]
     </span><span class="kw">fn </span>test_aggregate() {
         <span class="kw">let </span>ip_nets = <span class="macro">make_ipnet_vec!</span>[
             <span class="string">&quot;10.0.0.0/24&quot;</span>, <span class="string">&quot;10.0.1.0/24&quot;</span>, <span class="string">&quot;10.0.1.1/24&quot;</span>, <span class="string">&quot;10.0.1.2/24&quot;</span>,
             <span class="string">&quot;10.0.2.0/24&quot;</span>,
             <span class="string">&quot;10.1.0.0/24&quot;</span>, <span class="string">&quot;10.1.1.0/24&quot;</span>,
             <span class="string">&quot;192.168.0.0/24&quot;</span>, <span class="string">&quot;192.168.1.0/24&quot;</span>, <span class="string">&quot;192.168.2.0/24&quot;</span>, <span class="string">&quot;192.168.3.0/24&quot;</span>,
             <span class="string">&quot;fd00::/32&quot;</span>, <span class="string">&quot;fd00:1::/32&quot;</span>,
             <span class="string">&quot;fd00:2::/32&quot;</span>,
         ];

         <span class="kw">let </span>ip_aggs = <span class="macro">make_ipnet_vec!</span>[
             <span class="string">&quot;10.0.0.0/23&quot;</span>,
             <span class="string">&quot;10.0.2.0/24&quot;</span>,
             <span class="string">&quot;10.1.0.0/23&quot;</span>,
             <span class="string">&quot;192.168.0.0/22&quot;</span>,
             <span class="string">&quot;fd00::/31&quot;</span>,
             <span class="string">&quot;fd00:2::/32&quot;</span>,
         ];

         <span class="kw">let </span>ipv4_nets: Vec&lt;Ipv4Net&gt; = ip_nets.iter().filter_map(|p| <span class="kw">if let </span>IpNet::V4(x) = <span class="kw-2">*</span>p { <span class="prelude-val">Some</span>(x) } <span class="kw">else </span>{ <span class="prelude-val">None </span>}).collect();
         <span class="kw">let </span>ipv4_aggs: Vec&lt;Ipv4Net&gt; = ip_aggs.iter().filter_map(|p| <span class="kw">if let </span>IpNet::V4(x) = <span class="kw-2">*</span>p { <span class="prelude-val">Some</span>(x) } <span class="kw">else </span>{ <span class="prelude-val">None </span>}).collect();
         <span class="kw">let </span>ipv6_nets: Vec&lt;Ipv6Net&gt; = ip_nets.iter().filter_map(|p| <span class="kw">if let </span>IpNet::V6(x) = <span class="kw-2">*</span>p { <span class="prelude-val">Some</span>(x) } <span class="kw">else </span>{ <span class="prelude-val">None </span>}).collect();
         <span class="kw">let </span>ipv6_aggs: Vec&lt;Ipv6Net&gt; = ip_aggs.iter().filter_map(|p| <span class="kw">if let </span>IpNet::V6(x) = <span class="kw-2">*</span>p { <span class="prelude-val">Some</span>(x) } <span class="kw">else </span>{ <span class="prelude-val">None </span>}).collect();

         <span class="macro">assert_eq!</span>(IpNet::aggregate(<span class="kw-2">&amp;</span>ip_nets), ip_aggs);
         <span class="macro">assert_eq!</span>(Ipv4Net::aggregate(<span class="kw-2">&amp;</span>ipv4_nets), ipv4_aggs);
         <span class="macro">assert_eq!</span>(Ipv6Net::aggregate(<span class="kw-2">&amp;</span>ipv6_nets), ipv6_aggs);
     }

     <span class="attribute">#[test]
     </span><span class="kw">fn </span>test_aggregate_issue44() {
         <span class="kw">let </span>nets: Vec&lt;Ipv4Net&gt; = <span class="macro">vec!</span>[<span class="string">&quot;128.0.0.0/1&quot;</span>.parse().unwrap()];
         <span class="macro">assert_eq!</span>(Ipv4Net::aggregate(<span class="kw-2">&amp;</span>nets), nets);

         <span class="kw">let </span>nets: Vec&lt;Ipv4Net&gt; = <span class="macro">vec!</span>[<span class="string">&quot;0.0.0.0/1&quot;</span>.parse().unwrap(), <span class="string">&quot;128.0.0.0/1&quot;</span>.parse().unwrap()];
         <span class="macro">assert_eq!</span>(Ipv4Net::aggregate(<span class="kw-2">&amp;</span>nets), <span class="macro">vec!</span>[<span class="string">&quot;0.0.0.0/0&quot;</span>.parse().unwrap()]);

         <span class="kw">let </span>nets: Vec&lt;Ipv6Net&gt; = <span class="macro">vec!</span>[<span class="string">&quot;8000::/1&quot;</span>.parse().unwrap()];
         <span class="macro">assert_eq!</span>(Ipv6Net::aggregate(<span class="kw-2">&amp;</span>nets), nets);

         <span class="kw">let </span>nets: Vec&lt;Ipv6Net&gt; = <span class="macro">vec!</span>[<span class="string">&quot;::/1&quot;</span>.parse().unwrap(), <span class="string">&quot;8000::/1&quot;</span>.parse().unwrap()];
         <span class="macro">assert_eq!</span>(Ipv6Net::aggregate(<span class="kw-2">&amp;</span>nets), <span class="macro">vec!</span>[<span class="string">&quot;::/0&quot;</span>.parse().unwrap()]);
     }

     <span class="attribute">#[test]
     </span><span class="kw">fn </span>ipnet_default() {
         <span class="kw">let </span>ipnet: IpNet = <span class="string">&quot;0.0.0.0/0&quot;</span>.parse().unwrap();
         <span class="macro">assert_eq!</span>(ipnet, IpNet::default());
     }

     <span class="attribute">#[test]
     </span><span class="kw">fn </span>ipv4net_default() {
         <span class="kw">let </span>ipnet: Ipv4Net = <span class="string">&quot;0.0.0.0/0&quot;</span>.parse().unwrap();
         <span class="macro">assert_eq!</span>(ipnet, Ipv4Net::default());
     }

     <span class="attribute">#[test]
     </span><span class="kw">fn </span>ipv6net_default() {
         <span class="kw">let </span>ipnet: Ipv6Net = <span class="string">&quot;::/0&quot;</span>.parse().unwrap();
         <span class="macro">assert_eq!</span>(ipnet, Ipv6Net::default());
     }
 }
 </code></pre></div>
 </section></div></main><div id="rustdoc-vars" data-root-path="../../" data-current-crate="ipnet" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html>