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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::chacha::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><link rel="shortcut icon" href="https://www.rust-lang.org/favicon.ico"></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">&#9776;</div><a href='../../rand/index.html'><img src='https://www.rust-lang.org/logos/rust-logo-128x128-blk.png' alt='logo' width='100'></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-Copy">Copy</a><a href="#impl-Clone">Clone</a><a href="#impl-Debug">Debug</a><a href="#impl-Rng">Rng</a><a href="#impl-SeedableRng%3C%26%27a%20%5Bu32%5D%3E">SeedableRng&lt;&amp;&#39;a [u32]&gt;</a><a href="#impl-Rand">Rand</a></div><a class="sidebar-title" href="#synthetic-implementations">Auto Trait Implementations</a><div class="sidebar-links"><a href="#impl-Send">Send</a><a href="#impl-Sync">Sync</a></div></div><p class='location'><a href='../index.html'>rand</a>::<wbr><a href='index.html'>chacha</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"><input class="search-input" name="search" autocomplete="off" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><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='in-band'>Struct <a href='../index.html'>rand</a>::<wbr><a href='index.html'>chacha</a>::<wbr><a class="struct" href=''>ChaChaRng</a></span><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'>&#x2212;</span>]</a></span><a class='srclink' href='../../src/rand/prng/chacha.rs.html#33-37' title='goto source code'>[src]</a></span></h1><div class="docblock type-decl"><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>
<p>The ChaCha algorithm is widely accepted as suitable for
cryptographic purposes, but this implementation has not been
verified as such. Prefer a generator like <code>OsRng</code> that defers to
the operating system for cases that need high security.</p>
<p>[1]: D. J. Bernstein, <a href="http://cr.yp.to/chacha.html"><em>ChaCha, a variant of
Salsa20</em></a></p>
</div>
                    <h2 id='methods' class='small-section-header'>
                      Methods<a href='#methods' class='anchor'></a>
                    </h2>
                <h3 id='impl' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl <a class="struct" href="../../rand/struct.ChaChaRng.html" title="struct rand::ChaChaRng">ChaChaRng</a></code><a href='#impl' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rand/prng/chacha.rs.html#83-186' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'><h4 id='method.new_unseeded' class="method"><span id='new_unseeded.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.new_unseeded' class='fnname'>new_unseeded</a>() -&gt; <a class="struct" href="../../rand/struct.ChaChaRng.html" title="struct rand::ChaChaRng">ChaChaRng</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rand/prng/chacha.rs.html#104-108' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Create an ChaCha random number generator using the default
fixed key of 8 zero words.</p>
<h1 id="examples" class="section-header"><a href="#examples">Examples</a></h1>
<pre class="rust rust-example-rendered">
<span class="kw">use</span> <span class="ident">rand</span>::{<span class="ident">Rng</span>, <span class="ident">ChaChaRng</span>};

<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>();
<span class="macro">println</span><span class="macro">!</span>(<span class="string">&quot;{:?}&quot;</span>, <span class="ident">ra</span>.<span class="ident">next_u32</span>());
<span class="macro">println</span><span class="macro">!</span>(<span class="string">&quot;{:?}&quot;</span>, <span class="ident">ra</span>.<span class="ident">next_u32</span>());</pre>
<p>Since this equivalent to a RNG with a fixed seed, repeated executions
of an unseeded RNG will produce the same result. This code sample will
consistently produce:</p>
<ul>
<li>2917185654</li>
<li>2419978656</li>
</ul>
</div><h4 id='method.set_counter' class="method"><span id='set_counter.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.set_counter' class='fnname'>set_counter</a>(&amp;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></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rand/prng/chacha.rs.html#129-135' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Sets the internal 128-bit ChaCha counter to
a user-provided value. This permits jumping
arbitrarily ahead (or backwards) in the pseudorandom stream.</p>
<p>Since the nonce words are used to extend the counter to 128 bits,
users wishing to obtain the conventional ChaCha pseudorandom stream
associated with a particular nonce can call this function with
arguments <code>0, desired_nonce</code>.</p>
<h1 id="examples-1" class="section-header"><a href="#examples-1">Examples</a></h1>
<pre class="rust rust-example-rendered">
<span class="kw">use</span> <span class="ident">rand</span>::{<span class="ident">Rng</span>, <span class="ident">ChaChaRng</span>};

<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>();
<span class="ident">ra</span>.<span class="ident">set_counter</span>(<span class="number">0u64</span>, <span class="number">1234567890u64</span>);
<span class="macro">println</span><span class="macro">!</span>(<span class="string">&quot;{:?}&quot;</span>, <span class="ident">ra</span>.<span class="ident">next_u32</span>());
<span class="macro">println</span><span class="macro">!</span>(<span class="string">&quot;{:?}&quot;</span>, <span class="ident">ra</span>.<span class="ident">next_u32</span>());</pre>
</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-Copy' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>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></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rand/prng/chacha.rs.html#32' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'></div><h3 id='impl-Clone' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>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></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rand/prng/chacha.rs.html#32' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'><h4 id='method.clone' class="method"><span id='clone.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html#tymethod.clone' class='fnname'>clone</a>(&amp;self) -&gt; <a class="struct" href="../../rand/struct.ChaChaRng.html" title="struct rand::ChaChaRng">ChaChaRng</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rand/prng/chacha.rs.html#32' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><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>
</div><h4 id='method.clone_from' class="method"><span id='clone_from.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html#method.clone_from' class='fnname'>clone_from</a>(&amp;mut self, source: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;</a>Self)</code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/clone.rs.html#130-132' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><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>
</div></div><h3 id='impl-Debug' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>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></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rand/prng/chacha.rs.html#32' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'><h4 id='method.fmt' class="method"><span id='fmt.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html#tymethod.fmt' class='fnname'>fmt</a>(&amp;self, f: &amp;mut <a class="struct" href="https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html" title="struct core::fmt::Formatter">Formatter</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/nightly/core/fmt/type.Result.html" title="type core::fmt::Result">Result</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rand/prng/chacha.rs.html#32' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><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>
</div></div><h3 id='impl-Rng' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>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></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rand/prng/chacha.rs.html#188-199' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'><h4 id='method.next_u32' class="method"><span id='next_u32.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='../../rand/trait.Rng.html#tymethod.next_u32' class='fnname'>next_u32</a>(&amp;mut self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u32.html">u32</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rand/prng/chacha.rs.html#190-198' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Return the next random u32. <a href="../../rand/trait.Rng.html#tymethod.next_u32">Read more</a></p>
</div><h4 id='method.next_u64' class="method"><span id='next_u64.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='../../rand/trait.Rng.html#method.next_u64' class='fnname'>next_u64</a>(&amp;mut self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u64.html">u64</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rand/lib.rs.html#353-355' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Return the next random u64. <a href="../../rand/trait.Rng.html#method.next_u64">Read more</a></p>
</div><h4 id='method.next_f32' class="method"><span id='next_f32.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='../../rand/trait.Rng.html#method.next_f32' class='fnname'>next_f32</a>(&amp;mut self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.f32.html">f32</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rand/lib.rs.html#383-389' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><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>
</div><h4 id='method.next_f64' class="method"><span id='next_f64.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='../../rand/trait.Rng.html#method.next_f64' class='fnname'>next_f64</a>(&amp;mut self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.f64.html">f64</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rand/lib.rs.html#401-407' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><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>
</div><h4 id='method.fill_bytes' class="method"><span id='fill_bytes.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='../../rand/trait.Rng.html#method.fill_bytes' class='fnname'>fill_bytes</a>(&amp;mut self, dest: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&amp;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></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rand/lib.rs.html#436-458' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Fill <code>dest</code> with random data. <a href="../../rand/trait.Rng.html#method.fill_bytes">Read more</a></p>
</div><h4 id='method.gen' class="method"><span id='gen.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='../../rand/trait.Rng.html#method.gen' class='fnname'>gen</a>&lt;T:&nbsp;<a class="trait" href="../../rand/trait.Rand.html" title="trait rand::Rand">Rand</a>&gt;(&amp;mut self) -&gt; T <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;Self: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,&nbsp;</span></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rand/lib.rs.html#473-475' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Return a random value of a <code>Rand</code> type. <a href="../../rand/trait.Rng.html#method.gen">Read more</a></p>
</div><h4 id='method.gen_iter' class="method"><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>&lt;'a, T, R&gt;</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>&lt;'a, T, R&gt;</h3><code class="content"><span class="where fmt-newline">impl&lt;'a, T:&nbsp;<a class="trait" href="../../rand/trait.Rand.html" title="trait rand::Rand">Rand</a>, R:&nbsp;<a class="trait" href="../../rand/trait.Rng.html" title="trait rand::Rng">Rng</a>&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/core/iter/iterator/trait.Iterator.html" title="trait core::iter::iterator::Iterator">Iterator</a> for <a class="struct" href="../../rand/struct.Generator.html" title="struct rand::Generator">Generator</a>&lt;'a, T, R&gt;</span><span class="where fmt-newline">    type <a href='https://doc.rust-lang.org/nightly/core/iter/iterator/trait.Iterator.html#associatedtype.Item' class="type">Item</a> = T;</span></code></div></div><span id='gen_iter.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='../../rand/trait.Rng.html#method.gen_iter' class='fnname'>gen_iter</a>&lt;'a, T:&nbsp;<a class="trait" href="../../rand/trait.Rand.html" title="trait rand::Rand">Rand</a>&gt;(&amp;'a mut self) -&gt; <a class="struct" href="../../rand/struct.Generator.html" title="struct rand::Generator">Generator</a>&lt;'a, T, Self&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;Self: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,&nbsp;</span></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rand/lib.rs.html#491-493' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><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>
</div><h4 id='method.gen_range' class="method"><span id='gen_range.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='../../rand/trait.Rng.html#method.gen_range' class='fnname'>gen_range</a>&lt;T:&nbsp;<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>&gt;(&amp;mut self, low: T, high: T) -&gt; T <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;Self: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,&nbsp;</span></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rand/lib.rs.html#518-521' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><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>
</div><h4 id='method.gen_weighted_bool' class="method"><span id='gen_weighted_bool.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='../../rand/trait.Rng.html#method.gen_weighted_bool' class='fnname'>gen_weighted_bool</a>(&amp;mut self, n: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u32.html">u32</a>) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a> <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;Self: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,&nbsp;</span></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rand/lib.rs.html#533-535' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><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>
</div><h4 id='method.gen_ascii_chars' class="method"><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>&lt;'a, R&gt;</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>&lt;'a, R&gt;</h3><code class="content"><span class="where fmt-newline">impl&lt;'a, R:&nbsp;<a class="trait" href="../../rand/trait.Rng.html" title="trait rand::Rng">Rng</a>&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/core/iter/iterator/trait.Iterator.html" title="trait core::iter::iterator::Iterator">Iterator</a> for <a class="struct" href="../../rand/struct.AsciiGenerator.html" title="struct rand::AsciiGenerator">AsciiGenerator</a>&lt;'a, R&gt;</span><span class="where fmt-newline">    type <a href='https://doc.rust-lang.org/nightly/core/iter/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><span id='gen_ascii_chars.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='../../rand/trait.Rng.html#method.gen_ascii_chars' class='fnname'>gen_ascii_chars</a>&lt;'a&gt;(&amp;'a mut self) -&gt; <a class="struct" href="../../rand/struct.AsciiGenerator.html" title="struct rand::AsciiGenerator">AsciiGenerator</a>&lt;'a, Self&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;Self: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,&nbsp;</span></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rand/lib.rs.html#547-549' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><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>
</div><h4 id='method.choose' class="method"><span id='choose.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='../../rand/trait.Rng.html#method.choose' class='fnname'>choose</a>&lt;'a, T&gt;(&amp;mut self, values: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&amp;'a [T]</a>) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;'a </a>T&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;Self: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,&nbsp;</span></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rand/lib.rs.html#565-571' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Return a random element from <code>values</code>. <a href="../../rand/trait.Rng.html#method.choose">Read more</a></p>
</div><h4 id='method.choose_mut' class="method"><span id='choose_mut.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='../../rand/trait.Rng.html#method.choose_mut' class='fnname'>choose_mut</a>&lt;'a, T&gt;(&amp;mut self, values: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&amp;'a mut [T]</a>) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;'a mut </a>T&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;Self: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,&nbsp;</span></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rand/lib.rs.html#576-583' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><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>
</div><h4 id='method.shuffle' class="method"><span id='shuffle.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='../../rand/trait.Rng.html#method.shuffle' class='fnname'>shuffle</a>&lt;T&gt;(&amp;mut self, values: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&amp;mut [T]</a>) <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;Self: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,&nbsp;</span></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rand/lib.rs.html#602-610' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Shuffle a mutable slice in place. <a href="../../rand/trait.Rng.html#method.shuffle">Read more</a></p>
</div></div><h3 id='impl-SeedableRng%3C%26%27a%20%5Bu32%5D%3E' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl&lt;'a&gt; <a class="trait" href="../../rand/trait.SeedableRng.html" title="trait rand::SeedableRng">SeedableRng</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&amp;'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>&gt; 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></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rand/prng/chacha.rs.html#201-222' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'><h4 id='method.reseed' class="method"><span id='reseed.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='../../rand/trait.SeedableRng.html#tymethod.reseed' class='fnname'>reseed</a>(&amp;mut self, seed: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&amp;'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></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rand/prng/chacha.rs.html#203-211' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Reseed an RNG with the given seed. <a href="../../rand/trait.SeedableRng.html#tymethod.reseed">Read more</a></p>
</div><h4 id='method.from_seed' class="method"><span id='from_seed.v' class='invisible'><table class='table-display'><tbody><tr><td><code>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">&amp;'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>) -&gt; <a class="struct" href="../../rand/struct.ChaChaRng.html" title="struct rand::ChaChaRng">ChaChaRng</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rand/prng/chacha.rs.html#217-221' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Create a ChaCha generator from a seed,
obtained from a variable-length u32 array.
Only up to 8 words are used; if less than 8
words are used, the remaining are set to zero.</p>
</div></div><h3 id='impl-Rand' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>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></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rand/prng/chacha.rs.html#224-232' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'><h4 id='method.rand' class="method"><span id='rand.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='../../rand/trait.Rand.html#tymethod.rand' class='fnname'>rand</a>&lt;R:&nbsp;<a class="trait" href="../../rand/trait.Rng.html" title="trait rand::Rng">Rng</a>&gt;(other: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;mut </a>R) -&gt; <a class="struct" href="../../rand/struct.ChaChaRng.html" title="struct rand::ChaChaRng">ChaChaRng</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rand/prng/chacha.rs.html#225-231' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><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>
</div></div></div>
                <h2 id='synthetic-implementations' class='small-section-header'>
                  Auto Trait Implementations<a href='#synthetic-implementations' class='anchor'></a>
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                <div id='synthetic-implementations-list'>
            <h3 id='impl-Send' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>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></span></td><td><span class='out-of-band'></span></td></tr></tbody></table></h3><div class='impl-items'></div><h3 id='impl-Sync' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>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></span></td><td><span class='out-of-band'></span></td></tr></tbody></table></h3><div class='impl-items'></div></div></section><section id="search" class="content hidden"></section><section class="footer"></section><aside id="help" class="hidden"><div><h1 class="hidden">Help</h1><div class="shortcuts"><h2>Keyboard Shortcuts</h2><dl><dt><kbd>?</kbd></dt><dd>Show this help dialog</dd><dt><kbd>S</kbd></dt><dd>Focus the search field</dd><dt><kbd>↑</kbd></dt><dd>Move up in search results</dd><dt><kbd>↓</kbd></dt><dd>Move down in search results</dd><dt><kbd>↹</kbd></dt><dd>Switch tab</dd><dt><kbd>&#9166;</kbd></dt><dd>Go to active search result</dd><dt><kbd>+</kbd></dt><dd>Expand all sections</dd><dt><kbd>-</kbd></dt><dd>Collapse all sections</dd></dl></div><div class="infos"><h2>Search Tricks</h2><p>Prefix searches with a type followed by a colon (e.g. <code>fn:</code>) to restrict the search to a given type.</p><p>Accepted types are: <code>fn</code>, <code>mod</code>, <code>struct</code>, <code>enum</code>, <code>trait</code>, <code>type</code>, <code>macro</code>, and <code>const</code>.</p><p>Search functions by type signature (e.g. <code>vec -> usize</code> or <code>* -> vec</code>)</p><p>Search multiple things at once by splitting your query with comma (e.g. <code>str,u8</code> or <code>String,struct:Vec,test</code>)</p></div></div></aside><script>window.rootPath = "../../";window.currentCrate = "rand";</script><script src="../../aliases.js"></script><script src="../../main.js"></script><script defer src="../../search-index.js"></script></body></html>