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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="API documentation for the Rust `ChaChaRng` struct in crate `rand`."><meta name="keywords" content="rust, rustlang, rust-lang, ChaChaRng"><title>rand::ChaChaRng - Rust</title><link rel="stylesheet" type="text/css" href="../normalize.css"><link rel="stylesheet" type="text/css" href="../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../dark.css"><link rel="stylesheet" type="text/css" href="../light.css" id="themeStyle"><script src="../storage.js"></script><noscript><link rel="stylesheet" href="../noscript.css"></noscript><link rel="shortcut icon" href="https://www.rust-lang.org/favicon.ico"><style type="text/css">#crate-search{background-image:url("../down-arrow.svg");}</style></head><body class="rustdoc struct"><!--[if lte IE 8]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu">☰</div><a href='../rand/index.html'><div class='logo-container'><img src='https://www.rust-lang.org/logos/rust-logo-128x128-blk.png' alt='logo'></div></a><p class='location'>Struct ChaChaRng</p><div class="sidebar-elems"><div class="block items"><a class="sidebar-title" href="#methods">Methods</a><div class="sidebar-links"><a href="#method.new_unseeded">new_unseeded</a><a href="#method.set_counter">set_counter</a></div><a class="sidebar-title" href="#implementations">Trait Implementations</a><div class="sidebar-links"><a href="#impl-Clone">Clone</a><a href="#impl-Copy">Copy</a><a href="#impl-Debug">Debug</a><a href="#impl-Rand">Rand</a><a href="#impl-Rng">Rng</a><a href="#impl-SeedableRng%3C%26%27a%20%5Bu32%5D%3E">SeedableRng<&'a [u32]></a></div><a class="sidebar-title" href="#synthetic-implementations">Auto Trait Implementations</a><div class="sidebar-links"><a href="#impl-RefUnwindSafe">RefUnwindSafe</a><a href="#impl-Send">Send</a><a href="#impl-Sync">Sync</a><a href="#impl-Unpin">Unpin</a><a href="#impl-UnwindSafe">UnwindSafe</a></div><a class="sidebar-title" href="#blanket-implementations">Blanket Implementations</a><div class="sidebar-links"><a href="#impl-Any">Any</a><a href="#impl-Borrow%3CT%3E">Borrow<T></a><a href="#impl-BorrowMut%3CT%3E">BorrowMut<T></a><a href="#impl-From%3CT%3E">From<T></a><a href="#impl-Into%3CU%3E">Into<U></a><a href="#impl-ToOwned">ToOwned</a><a href="#impl-TryFrom%3CU%3E">TryFrom<U></a><a href="#impl-TryInto%3CU%3E">TryInto<U></a></div></div><p class='location'><a href='index.html'>rand</a></p><script>window.sidebarCurrent = {name: 'ChaChaRng', ty: 'struct', relpath: ''};</script><script defer src="sidebar-items.js"></script></div></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!"><img src="../brush.svg" width="18" alt="Pick another theme!"></button><div id="theme-choices"></div></div><script src="../theme.js"></script><nav class="sub"><form class="search-form js-only"><div class="search-container"><div><select id="crate-search"><option value="All crates">All crates</option></select><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"></div><a id="settings-menu" href="../settings.html"><img src="../wheel.svg" width="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><h1 class='fqn'><span class='out-of-band'><span id='render-detail'><a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class='inner'>−</span>]</a></span><a class='srclink' href='../src/rand/prng/chacha.rs.html#33-37' title='goto source code'>[src]</a></span><span class='in-band'>Struct <a href='index.html'>rand</a>::<wbr><a class="struct" href=''>ChaChaRng</a></span></h1><div class="docblock type-decl hidden-by-usual-hider"><pre class='rust struct'>pub struct ChaChaRng { /* fields omitted */ }</pre></div><div class='docblock'><p>A random number generator that uses the ChaCha20 algorithm [1].</p>
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<p>The ChaCha algorithm is widely accepted as suitable for
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cryptographic purposes, but this implementation has not been
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verified as such. Prefer a generator like <code>OsRng</code> that defers to
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the operating system for cases that need high security.</p>
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<p>[1]: D. J. Bernstein, <a href="http://cr.yp.to/chacha.html"><em>ChaCha, a variant of
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Salsa20</em></a></p>
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</div><h2 id='methods' class='small-section-header'>Methods<a href='#methods' class='anchor'></a></h2><h3 id='impl' class='impl'><code class='in-band'>impl <a class="struct" href="../rand/struct.ChaChaRng.html" title="struct rand::ChaChaRng">ChaChaRng</a></code><a href='#impl' class='anchor'></a><a class='srclink' href='../src/rand/prng/chacha.rs.html#83-186' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.new_unseeded' class="method"><code id='new_unseeded.v'>pub fn <a href='#method.new_unseeded' class='fnname'>new_unseeded</a>() -> <a class="struct" href="../rand/struct.ChaChaRng.html" title="struct rand::ChaChaRng">ChaChaRng</a></code><a class='srclink' href='../src/rand/prng/chacha.rs.html#104-108' title='goto source code'>[src]</a></h4><div class='docblock'><p>Create an ChaCha random number generator using the default
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fixed key of 8 zero words.</p>
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<h1 id="examples" class="section-header"><a href="#examples">Examples</a></h1>
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<div class="example-wrap"><pre class="rust rust-example-rendered">
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<span class="kw">use</span> <span class="ident">rand</span>::{<span class="ident">Rng</span>, <span class="ident">ChaChaRng</span>};
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<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">ra</span> <span class="op">=</span> <span class="ident">ChaChaRng</span>::<span class="ident">new_unseeded</span>();
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<span class="macro">println</span><span class="macro">!</span>(<span class="string">"{:?}"</span>, <span class="ident">ra</span>.<span class="ident">next_u32</span>());
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<span class="macro">println</span><span class="macro">!</span>(<span class="string">"{:?}"</span>, <span class="ident">ra</span>.<span class="ident">next_u32</span>());</pre></div>
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<p>Since this equivalent to a RNG with a fixed seed, repeated executions
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of an unseeded RNG will produce the same result. This code sample will
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consistently produce:</p>
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<ul>
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<li>2917185654</li>
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<li>2419978656</li>
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</ul>
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</div><h4 id='method.set_counter' class="method"><code id='set_counter.v'>pub fn <a href='#method.set_counter' class='fnname'>set_counter</a>(&mut self, counter_low: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u64.html">u64</a>, counter_high: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u64.html">u64</a>)</code><a class='srclink' href='../src/rand/prng/chacha.rs.html#129-135' title='goto source code'>[src]</a></h4><div class='docblock'><p>Sets the internal 128-bit ChaCha counter to
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a user-provided value. This permits jumping
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arbitrarily ahead (or backwards) in the pseudorandom stream.</p>
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<p>Since the nonce words are used to extend the counter to 128 bits,
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users wishing to obtain the conventional ChaCha pseudorandom stream
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associated with a particular nonce can call this function with
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arguments <code>0, desired_nonce</code>.</p>
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<h1 id="examples-1" class="section-header"><a href="#examples-1">Examples</a></h1>
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<div class="example-wrap"><pre class="rust rust-example-rendered">
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<span class="kw">use</span> <span class="ident">rand</span>::{<span class="ident">Rng</span>, <span class="ident">ChaChaRng</span>};
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<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">ra</span> <span class="op">=</span> <span class="ident">ChaChaRng</span>::<span class="ident">new_unseeded</span>();
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<span class="ident">ra</span>.<span class="ident">set_counter</span>(<span class="number">0u64</span>, <span class="number">1234567890u64</span>);
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<span class="macro">println</span><span class="macro">!</span>(<span class="string">"{:?}"</span>, <span class="ident">ra</span>.<span class="ident">next_u32</span>());
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<span class="macro">println</span><span class="macro">!</span>(<span class="string">"{:?}"</span>, <span class="ident">ra</span>.<span class="ident">next_u32</span>());</pre></div>
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</div></div><h2 id='implementations' class='small-section-header'>Trait Implementations<a href='#implementations' class='anchor'></a></h2><div id='implementations-list'><h3 id='impl-Rand' class='impl'><code class='in-band'>impl <a class="trait" href="../rand/trait.Rand.html" title="trait rand::Rand">Rand</a> for <a class="struct" href="../rand/struct.ChaChaRng.html" title="struct rand::ChaChaRng">ChaChaRng</a></code><a href='#impl-Rand' class='anchor'></a><a class='srclink' href='../src/rand/prng/chacha.rs.html#224-232' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.rand' class="method hidden"><code id='rand.v'>fn <a href='../rand/trait.Rand.html#tymethod.rand' class='fnname'>rand</a><R: <a class="trait" href="../rand/trait.Rng.html" title="trait rand::Rng">Rng</a>>(other: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&mut </a>R) -> <a class="struct" href="../rand/struct.ChaChaRng.html" title="struct rand::ChaChaRng">ChaChaRng</a></code><a class='srclink' href='../src/rand/prng/chacha.rs.html#225-231' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Generates a random instance of this type using the specified source of randomness. <a href="../rand/trait.Rand.html#tymethod.rand">Read more</a></p>
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</div></div><h3 id='impl-Rng' class='impl'><code class='in-band'>impl <a class="trait" href="../rand/trait.Rng.html" title="trait rand::Rng">Rng</a> for <a class="struct" href="../rand/struct.ChaChaRng.html" title="struct rand::ChaChaRng">ChaChaRng</a></code><a href='#impl-Rng' class='anchor'></a><a class='srclink' href='../src/rand/prng/chacha.rs.html#188-199' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.next_u32' class="method hidden"><code id='next_u32.v'>fn <a href='../rand/trait.Rng.html#tymethod.next_u32' class='fnname'>next_u32</a>(&mut self) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u32.html">u32</a></code><a class='srclink' href='../src/rand/prng/chacha.rs.html#190-198' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Return the next random u32. <a href="../rand/trait.Rng.html#tymethod.next_u32">Read more</a></p>
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</div><h4 id='method.next_u64' class="method hidden"><code id='next_u64.v'>fn <a href='../rand/trait.Rng.html#method.next_u64' class='fnname'>next_u64</a>(&mut self) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u64.html">u64</a></code><a class='srclink' href='../src/rand/lib.rs.html#359-361' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Return the next random u64. <a href="../rand/trait.Rng.html#method.next_u64">Read more</a></p>
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</div><h4 id='method.next_f32' class="method hidden"><code id='next_f32.v'>fn <a href='../rand/trait.Rng.html#method.next_f32' class='fnname'>next_f32</a>(&mut self) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.f32.html">f32</a></code><a class='srclink' href='../src/rand/lib.rs.html#389-395' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Return the next random f32 selected from the half-open interval <code>[0, 1)</code>. <a href="../rand/trait.Rng.html#method.next_f32">Read more</a></p>
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</div><h4 id='method.next_f64' class="method hidden"><code id='next_f64.v'>fn <a href='../rand/trait.Rng.html#method.next_f64' class='fnname'>next_f64</a>(&mut self) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.f64.html">f64</a></code><a class='srclink' href='../src/rand/lib.rs.html#407-413' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Return the next random f64 selected from the half-open interval <code>[0, 1)</code>. <a href="../rand/trait.Rng.html#method.next_f64">Read more</a></p>
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</div><h4 id='method.fill_bytes' class="method hidden"><code id='fill_bytes.v'>fn <a href='../rand/trait.Rng.html#method.fill_bytes' class='fnname'>fill_bytes</a>(&mut self, dest: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&mut [</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>)</code><a class='srclink' href='../src/rand/lib.rs.html#442-464' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Fill <code>dest</code> with random data. <a href="../rand/trait.Rng.html#method.fill_bytes">Read more</a></p>
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</div><h4 id='method.gen' class="method hidden"><code id='gen.v'>fn <a href='../rand/trait.Rng.html#method.gen' class='fnname'>gen</a><T: <a class="trait" href="../rand/trait.Rand.html" title="trait rand::Rand">Rand</a>>(&mut self) -> T <span class="where fmt-newline">where<br> Self: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>, </span></code><a class='srclink' href='../src/rand/lib.rs.html#479-481' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Return a random value of a <code>Rand</code> type. <a href="../rand/trait.Rng.html#method.gen">Read more</a></p>
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</div><h4 id='method.gen_iter' class="method hidden"><div class="important-traits"><div class='tooltip'>ⓘ<span class='tooltiptext'>Important traits for <a class="struct" href="../rand/struct.Generator.html" title="struct rand::Generator">Generator</a><'a, T, R></span></div><div class="content hidden"><h3 class="important">Important traits for <a class="struct" href="../rand/struct.Generator.html" title="struct rand::Generator">Generator</a><'a, T, R></h3><code class="content"><span class="where fmt-newline">impl<'a, T: <a class="trait" href="../rand/trait.Rand.html" title="trait rand::Rand">Rand</a>, R: <a class="trait" href="../rand/trait.Rng.html" title="trait rand::Rng">Rng</a>> <a class="trait" href="https://doc.rust-lang.org/nightly/core/iter/traits/iterator/trait.Iterator.html" title="trait core::iter::traits::iterator::Iterator">Iterator</a> for <a class="struct" href="../rand/struct.Generator.html" title="struct rand::Generator">Generator</a><'a, T, R></span><span class="where fmt-newline"> type <a href='https://doc.rust-lang.org/nightly/core/iter/traits/iterator/trait.Iterator.html#associatedtype.Item' class="type">Item</a> = T;</span></code></div></div><code id='gen_iter.v'>fn <a href='../rand/trait.Rng.html#method.gen_iter' class='fnname'>gen_iter</a><'a, T: <a class="trait" href="../rand/trait.Rand.html" title="trait rand::Rand">Rand</a>>(&'a mut self) -> <a class="struct" href="../rand/struct.Generator.html" title="struct rand::Generator">Generator</a><'a, T, Self> <span class="where fmt-newline">where<br> Self: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>, </span></code><a class='srclink' href='../src/rand/lib.rs.html#497-499' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Return an iterator that will yield an infinite number of randomly generated items. <a href="../rand/trait.Rng.html#method.gen_iter">Read more</a></p>
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</div><h4 id='method.gen_range' class="method hidden"><code id='gen_range.v'>fn <a href='../rand/trait.Rng.html#method.gen_range' class='fnname'>gen_range</a><T: <a class="trait" href="https://doc.rust-lang.org/nightly/core/cmp/trait.PartialOrd.html" title="trait core::cmp::PartialOrd">PartialOrd</a> + <a class="trait" href="../rand/distributions/range/trait.SampleRange.html" title="trait rand::distributions::range::SampleRange">SampleRange</a>>(&mut self, low: T, high: T) -> T <span class="where fmt-newline">where<br> Self: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>, </span></code><a class='srclink' href='../src/rand/lib.rs.html#524-527' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Generate a random value in the range [<code>low</code>, <code>high</code>). <a href="../rand/trait.Rng.html#method.gen_range">Read more</a></p>
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</div><h4 id='method.gen_weighted_bool' class="method hidden"><code id='gen_weighted_bool.v'>fn <a href='../rand/trait.Rng.html#method.gen_weighted_bool' class='fnname'>gen_weighted_bool</a>(&mut self, n: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u32.html">u32</a>) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a> <span class="where fmt-newline">where<br> Self: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>, </span></code><a class='srclink' href='../src/rand/lib.rs.html#539-541' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Return a bool with a 1 in n chance of true <a href="../rand/trait.Rng.html#method.gen_weighted_bool">Read more</a></p>
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</div><h4 id='method.gen_ascii_chars' class="method hidden"><div class="important-traits"><div class='tooltip'>ⓘ<span class='tooltiptext'>Important traits for <a class="struct" href="../rand/struct.AsciiGenerator.html" title="struct rand::AsciiGenerator">AsciiGenerator</a><'a, R></span></div><div class="content hidden"><h3 class="important">Important traits for <a class="struct" href="../rand/struct.AsciiGenerator.html" title="struct rand::AsciiGenerator">AsciiGenerator</a><'a, R></h3><code class="content"><span class="where fmt-newline">impl<'a, R: <a class="trait" href="../rand/trait.Rng.html" title="trait rand::Rng">Rng</a>> <a class="trait" href="https://doc.rust-lang.org/nightly/core/iter/traits/iterator/trait.Iterator.html" title="trait core::iter::traits::iterator::Iterator">Iterator</a> for <a class="struct" href="../rand/struct.AsciiGenerator.html" title="struct rand::AsciiGenerator">AsciiGenerator</a><'a, R></span><span class="where fmt-newline"> type <a href='https://doc.rust-lang.org/nightly/core/iter/traits/iterator/trait.Iterator.html#associatedtype.Item' class="type">Item</a> = <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.char.html">char</a>;</span></code></div></div><code id='gen_ascii_chars.v'>fn <a href='../rand/trait.Rng.html#method.gen_ascii_chars' class='fnname'>gen_ascii_chars</a><'a>(&'a mut self) -> <a class="struct" href="../rand/struct.AsciiGenerator.html" title="struct rand::AsciiGenerator">AsciiGenerator</a><'a, Self> <span class="where fmt-newline">where<br> Self: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>, </span></code><a class='srclink' href='../src/rand/lib.rs.html#553-555' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Return an iterator of random characters from the set A-Z,a-z,0-9. <a href="../rand/trait.Rng.html#method.gen_ascii_chars">Read more</a></p>
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</div><h4 id='method.choose' class="method hidden"><code id='choose.v'>fn <a href='../rand/trait.Rng.html#method.choose' class='fnname'>choose</a><'a, T>(&mut self, values: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&'a [T]</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&'a </a>T> <span class="where fmt-newline">where<br> Self: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>, </span></code><a class='srclink' href='../src/rand/lib.rs.html#571-577' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Return a random element from <code>values</code>. <a href="../rand/trait.Rng.html#method.choose">Read more</a></p>
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</div><h4 id='method.choose_mut' class="method hidden"><code id='choose_mut.v'>fn <a href='../rand/trait.Rng.html#method.choose_mut' class='fnname'>choose_mut</a><'a, T>(&mut self, values: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&'a mut [T]</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&'a mut </a>T> <span class="where fmt-newline">where<br> Self: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>, </span></code><a class='srclink' href='../src/rand/lib.rs.html#582-589' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Return a mutable pointer to a random element from <code>values</code>. <a href="../rand/trait.Rng.html#method.choose_mut">Read more</a></p>
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</div><h4 id='method.shuffle' class="method hidden"><code id='shuffle.v'>fn <a href='../rand/trait.Rng.html#method.shuffle' class='fnname'>shuffle</a><T>(&mut self, values: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&mut [T]</a>) <span class="where fmt-newline">where<br> Self: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>, </span></code><a class='srclink' href='../src/rand/lib.rs.html#608-616' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Shuffle a mutable slice in place. <a href="../rand/trait.Rng.html#method.shuffle">Read more</a></p>
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</div></div><h3 id='impl-SeedableRng%3C%26%27a%20%5Bu32%5D%3E' class='impl'><code class='in-band'>impl<'a> <a class="trait" href="../rand/trait.SeedableRng.html" title="trait rand::SeedableRng">SeedableRng</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&'a [</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u32.html">u32</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>> for <a class="struct" href="../rand/struct.ChaChaRng.html" title="struct rand::ChaChaRng">ChaChaRng</a></code><a href='#impl-SeedableRng%3C%26%27a%20%5Bu32%5D%3E' class='anchor'></a><a class='srclink' href='../src/rand/prng/chacha.rs.html#201-222' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.reseed' class="method hidden"><code id='reseed.v'>fn <a href='../rand/trait.SeedableRng.html#tymethod.reseed' class='fnname'>reseed</a>(&mut self, seed: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&'a [</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u32.html">u32</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>)</code><a class='srclink' href='../src/rand/prng/chacha.rs.html#203-211' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Reseed an RNG with the given seed. <a href="../rand/trait.SeedableRng.html#tymethod.reseed">Read more</a></p>
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</div><h4 id='method.from_seed' class="method"><code id='from_seed.v'>fn <a href='../rand/trait.SeedableRng.html#tymethod.from_seed' class='fnname'>from_seed</a>(seed: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&'a [</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u32.html">u32</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>) -> <a class="struct" href="../rand/struct.ChaChaRng.html" title="struct rand::ChaChaRng">ChaChaRng</a></code><a class='srclink' href='../src/rand/prng/chacha.rs.html#217-221' title='goto source code'>[src]</a></h4><div class='docblock'><p>Create a ChaCha generator from a seed,
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obtained from a variable-length u32 array.
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Only up to 8 words are used; if less than 8
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words are used, the remaining are set to zero.</p>
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</div></div><h3 id='impl-Clone' class='impl'><code class='in-band'>impl <a class="trait" href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a> for <a class="struct" href="../rand/struct.ChaChaRng.html" title="struct rand::ChaChaRng">ChaChaRng</a></code><a href='#impl-Clone' class='anchor'></a><a class='srclink' href='../src/rand/prng/chacha.rs.html#32' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.clone' class="method hidden"><code id='clone.v'>fn <a href='https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html#tymethod.clone' class='fnname'>clone</a>(&self) -> <a class="struct" href="../rand/struct.ChaChaRng.html" title="struct rand::ChaChaRng">ChaChaRng</a></code><a class='srclink' href='../src/rand/prng/chacha.rs.html#32' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Returns a copy of the value. <a href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html#tymethod.clone">Read more</a></p>
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</div><h4 id='method.clone_from' class="method hidden"><code id='clone_from.v'>fn <a href='https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html#method.clone_from' class='fnname'>clone_from</a>(&mut self, source: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&</a>Self)</code><span class='since' title='Stable since Rust version 1.0.0'>1.0.0</span><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/clone.rs.html#131-133' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Performs copy-assignment from <code>source</code>. <a href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html#method.clone_from">Read more</a></p>
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</div></div><h3 id='impl-Copy' class='impl'><code class='in-band'>impl <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Copy.html" title="trait core::marker::Copy">Copy</a> for <a class="struct" href="../rand/struct.ChaChaRng.html" title="struct rand::ChaChaRng">ChaChaRng</a></code><a href='#impl-Copy' class='anchor'></a><a class='srclink' href='../src/rand/prng/chacha.rs.html#32' title='goto source code'>[src]</a></h3><div class='impl-items'></div><h3 id='impl-Debug' class='impl'><code class='in-band'>impl <a class="trait" href="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html" title="trait core::fmt::Debug">Debug</a> for <a class="struct" href="../rand/struct.ChaChaRng.html" title="struct rand::ChaChaRng">ChaChaRng</a></code><a href='#impl-Debug' class='anchor'></a><a class='srclink' href='../src/rand/prng/chacha.rs.html#32' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.fmt' class="method hidden"><code id='fmt.v'>fn <a href='https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html#tymethod.fmt' class='fnname'>fmt</a>(&self, f: &mut <a class="struct" href="https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html" title="struct core::fmt::Formatter">Formatter</a>) -> <a class="type" href="https://doc.rust-lang.org/nightly/core/fmt/type.Result.html" title="type core::fmt::Result">Result</a></code><a class='srclink' href='../src/rand/prng/chacha.rs.html#32' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Formats the value using the given formatter. <a href="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html#tymethod.fmt">Read more</a></p>
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</div></div></div><h2 id='synthetic-implementations' class='small-section-header'>Auto Trait Implementations<a href='#synthetic-implementations' class='anchor'></a></h2><div id='synthetic-implementations-list'><h3 id='impl-Send' class='impl'><code class='in-band'>impl <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> for <a class="struct" href="../rand/struct.ChaChaRng.html" title="struct rand::ChaChaRng">ChaChaRng</a></code><a href='#impl-Send' class='anchor'></a></h3><div class='impl-items'></div><h3 id='impl-Unpin' class='impl'><code class='in-band'>impl <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a> for <a class="struct" href="../rand/struct.ChaChaRng.html" title="struct rand::ChaChaRng">ChaChaRng</a></code><a href='#impl-Unpin' class='anchor'></a></h3><div class='impl-items'></div><h3 id='impl-Sync' class='impl'><code class='in-band'>impl <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a> for <a class="struct" href="../rand/struct.ChaChaRng.html" title="struct rand::ChaChaRng">ChaChaRng</a></code><a href='#impl-Sync' class='anchor'></a></h3><div class='impl-items'></div><h3 id='impl-UnwindSafe' class='impl'><code class='in-band'>impl <a class="trait" href="https://doc.rust-lang.org/nightly/std/panic/trait.UnwindSafe.html" title="trait std::panic::UnwindSafe">UnwindSafe</a> for <a class="struct" href="../rand/struct.ChaChaRng.html" title="struct rand::ChaChaRng">ChaChaRng</a></code><a href='#impl-UnwindSafe' class='anchor'></a></h3><div class='impl-items'></div><h3 id='impl-RefUnwindSafe' class='impl'><code class='in-band'>impl <a class="trait" href="https://doc.rust-lang.org/nightly/std/panic/trait.RefUnwindSafe.html" title="trait std::panic::RefUnwindSafe">RefUnwindSafe</a> for <a class="struct" href="../rand/struct.ChaChaRng.html" title="struct rand::ChaChaRng">ChaChaRng</a></code><a href='#impl-RefUnwindSafe' class='anchor'></a></h3><div class='impl-items'></div></div><h2 id='blanket-implementations' class='small-section-header'>Blanket Implementations<a href='#blanket-implementations' class='anchor'></a></h2><div id='blanket-implementations-list'><h3 id='impl-ToOwned' class='impl'><code class='in-band'>impl<T> <a class="trait" href="https://doc.rust-lang.org/nightly/alloc/borrow/trait.ToOwned.html" title="trait alloc::borrow::ToOwned">ToOwned</a> for T <span class="where fmt-newline">where<br> T: <a class="trait" href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a>, </span></code><a href='#impl-ToOwned' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/alloc/borrow.rs.html#81-92' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='associatedtype.Owned' class="type"><code id='Owned.t'>type <a href='https://doc.rust-lang.org/nightly/alloc/borrow/trait.ToOwned.html#associatedtype.Owned' class="type">Owned</a> = T</code></h4><div class='docblock'><p>The resulting type after obtaining ownership.</p>
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</div><h4 id='method.to_owned' class="method hidden"><code id='to_owned.v'>fn <a href='https://doc.rust-lang.org/nightly/alloc/borrow/trait.ToOwned.html#tymethod.to_owned' class='fnname'>to_owned</a>(&self) -> T</code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/alloc/borrow.rs.html#85-87' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Creates owned data from borrowed data, usually by cloning. <a href="https://doc.rust-lang.org/nightly/alloc/borrow/trait.ToOwned.html#tymethod.to_owned">Read more</a></p>
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</div><h4 id='method.clone_into' class="method hidden"><code id='clone_into.v'>fn <a href='https://doc.rust-lang.org/nightly/alloc/borrow/trait.ToOwned.html#method.clone_into' class='fnname'>clone_into</a>(&self, target: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&mut </a>T)</code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/alloc/borrow.rs.html#89-91' title='goto source code'>[src]</a></h4><div class='stability hidden'><div class='stab unstable'><details><summary><span class='emoji'>🔬</span> This is a nightly-only experimental API. (<code>toowned_clone_into</code>)</summary><p>recently added</p>
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</details></div></div><div class='docblock hidden'><p>Uses borrowed data to replace owned data, usually by cloning. <a href="https://doc.rust-lang.org/nightly/alloc/borrow/trait.ToOwned.html#method.clone_into">Read more</a></p>
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</div></div><h3 id='impl-Into%3CU%3E' class='impl'><code class='in-band'>impl<T, U> <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a><U> for T <span class="where fmt-newline">where<br> U: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.From.html" title="trait core::convert::From">From</a><T>, </span></code><a href='#impl-Into%3CU%3E' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/convert.rs.html#544-549' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.into' class="method hidden"><code id='into.v'>fn <a href='https://doc.rust-lang.org/nightly/core/convert/trait.Into.html#tymethod.into' class='fnname'>into</a>(self) -> U</code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/convert.rs.html#546-548' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Performs the conversion.</p>
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</div></div><h3 id='impl-From%3CT%3E' class='impl'><code class='in-band'>impl<T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.From.html" title="trait core::convert::From">From</a><T> for T</code><a href='#impl-From%3CT%3E' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/convert.rs.html#553-555' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.from' class="method hidden"><code id='from.v'>fn <a href='https://doc.rust-lang.org/nightly/core/convert/trait.From.html#tymethod.from' class='fnname'>from</a>(t: T) -> T</code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/convert.rs.html#554' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Performs the conversion.</p>
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</div></div><h3 id='impl-TryFrom%3CU%3E' class='impl'><code class='in-band'>impl<T, U> <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><U> for T <span class="where fmt-newline">where<br> U: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a><T>, </span></code><a href='#impl-TryFrom%3CU%3E' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/convert.rs.html#572-578' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='associatedtype.Error' class="type"><code id='Error.t'>type <a href='https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#associatedtype.Error' class="type">Error</a> = <a class="enum" href="https://doc.rust-lang.org/nightly/core/convert/enum.Infallible.html" title="enum core::convert::Infallible">Infallible</a></code></h4><div class='docblock'><p>The type returned in the event of a conversion error.</p>
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</div><h4 id='method.try_from' class="method hidden"><code id='try_from.v'>fn <a href='https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#tymethod.try_from' class='fnname'>try_from</a>(value: U) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><T, <T as <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><U>>::<a class="type" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a>></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/convert.rs.html#575-577' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Performs the conversion.</p>
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</div></div><h3 id='impl-TryInto%3CU%3E' class='impl'><code class='in-band'>impl<T, U> <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryInto.html" title="trait core::convert::TryInto">TryInto</a><U> for T <span class="where fmt-newline">where<br> U: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><T>, </span></code><a href='#impl-TryInto%3CU%3E' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/convert.rs.html#560-567' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='associatedtype.Error-1' class="type"><code id='Error.t-1'>type <a href='https://doc.rust-lang.org/nightly/core/convert/trait.TryInto.html#associatedtype.Error' class="type">Error</a> = <U as <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><T>>::<a class="type" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a></code></h4><div class='docblock'><p>The type returned in the event of a conversion error.</p>
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</div><h4 id='method.try_into' class="method hidden"><code id='try_into.v'>fn <a href='https://doc.rust-lang.org/nightly/core/convert/trait.TryInto.html#tymethod.try_into' class='fnname'>try_into</a>(self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><U, <U as <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><T>>::<a class="type" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a>></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/convert.rs.html#564-566' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Performs the conversion.</p>
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</div></div><h3 id='impl-BorrowMut%3CT%3E' class='impl'><code class='in-band'>impl<T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/borrow/trait.BorrowMut.html" title="trait core::borrow::BorrowMut">BorrowMut</a><T> for T <span class="where fmt-newline">where<br> T: ?<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>, </span></code><a href='#impl-BorrowMut%3CT%3E' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/borrow.rs.html#218-220' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.borrow_mut' class="method hidden"><code id='borrow_mut.v'>fn <a href='https://doc.rust-lang.org/nightly/core/borrow/trait.BorrowMut.html#tymethod.borrow_mut' class='fnname'>borrow_mut</a>(&mut self) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&mut </a>T</code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/borrow.rs.html#219' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Mutably borrows from an owned value. <a href="https://doc.rust-lang.org/nightly/core/borrow/trait.BorrowMut.html#tymethod.borrow_mut">Read more</a></p>
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</div></div><h3 id='impl-Borrow%3CT%3E' class='impl'><code class='in-band'>impl<T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/borrow/trait.Borrow.html" title="trait core::borrow::Borrow">Borrow</a><T> for T <span class="where fmt-newline">where<br> T: ?<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>, </span></code><a href='#impl-Borrow%3CT%3E' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/borrow.rs.html#213-215' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.borrow' class="method hidden"><code id='borrow.v'>fn <a href='https://doc.rust-lang.org/nightly/core/borrow/trait.Borrow.html#tymethod.borrow' class='fnname'>borrow</a>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&</a>T</code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/borrow.rs.html#214' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Immutably borrows from an owned value. <a href="https://doc.rust-lang.org/nightly/core/borrow/trait.Borrow.html#tymethod.borrow">Read more</a></p>
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</div></div><h3 id='impl-Any' class='impl'><code class='in-band'>impl<T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/any/trait.Any.html" title="trait core::any::Any">Any</a> for T <span class="where fmt-newline">where<br> T: 'static + ?<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>, </span></code><a href='#impl-Any' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/any.rs.html#100-102' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.type_id' class="method hidden"><code id='type_id.v'>fn <a href='https://doc.rust-lang.org/nightly/core/any/trait.Any.html#tymethod.type_id' class='fnname'>type_id</a>(&self) -> <a class="struct" href="https://doc.rust-lang.org/nightly/core/any/struct.TypeId.html" title="struct core::any::TypeId">TypeId</a></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/any.rs.html#101' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Gets the <code>TypeId</code> of <code>self</code>. <a href="https://doc.rust-lang.org/nightly/core/any/trait.Any.html#tymethod.type_id">Read more</a></p>
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