| <!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/uuid-0.8.2/src/v4.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>v4.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="icon" href="https://www.rust-lang.org/favicon.ico"></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="../../uuid/index.html"><div class="logo-container"> |
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| </pre><pre class="rust"><code><span class="kw">use </span><span class="kw">crate</span>::prelude::<span class="kw-2">*</span>; |
| |
| <span class="kw">impl </span>Uuid { |
| <span class="doccomment">/// Creates a random UUID. |
| /// |
| /// This uses the [`getrandom`] crate to utilise the operating system's RNG |
| /// as the source of random numbers. If you'd like to use a custom |
| /// generator, don't use this method: generate random bytes using your |
| /// custom generator and pass them to the |
| /// [`uuid::Builder::from_bytes`][from_bytes] function instead. |
| /// |
| /// Note that usage of this method requires the `v4` feature of this crate |
| /// to be enabled. |
| /// |
| /// # Examples |
| /// |
| /// Basic usage: |
| /// |
| /// ``` |
| /// use uuid::Uuid; |
| /// |
| /// let uuid = Uuid::new_v4(); |
| /// ``` |
| /// |
| /// [`getrandom`]: https://crates.io/crates/getrandom |
| /// [from_bytes]: struct.Builder.html#method.from_bytes |
| </span><span class="kw">pub fn </span>new_v4() -> Uuid { |
| <span class="kw">let </span><span class="kw-2">mut </span>bytes = [<span class="number">0u8</span>; <span class="number">16</span>]; |
| getrandom::getrandom(<span class="kw-2">&mut </span>bytes).unwrap_or_else(|err| { |
| <span class="comment">// NB: getrandom::Error has no source; this is adequate display |
| </span><span class="macro">panic!</span>(<span class="string">"could not retreive random bytes for uuid: {}"</span>, err) |
| }); |
| |
| <span class="kw">crate</span>::Builder::from_bytes(bytes) |
| .set_variant(Variant::RFC4122) |
| .set_version(Version::Random) |
| .build() |
| } |
| } |
| |
| <span class="attribute">#[cfg(test)] |
| </span><span class="kw">mod </span>tests { |
| <span class="kw">use </span><span class="kw">crate</span>::prelude::<span class="kw-2">*</span>; |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_new() { |
| <span class="kw">let </span>uuid = Uuid::new_v4(); |
| |
| <span class="macro">assert_eq!</span>(uuid.get_version(), <span class="prelude-val">Some</span>(Version::Random)); |
| <span class="macro">assert_eq!</span>(uuid.get_variant(), <span class="prelude-val">Some</span>(Variant::RFC4122)); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_get_version() { |
| <span class="kw">let </span>uuid = Uuid::new_v4(); |
| |
| <span class="macro">assert_eq!</span>(uuid.get_version(), <span class="prelude-val">Some</span>(Version::Random)); |
| <span class="macro">assert_eq!</span>(uuid.get_version_num(), <span class="number">4</span>) |
| } |
| } |
| </code></pre></div> |
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