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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 `Reseeder` trait in crate `rand`."><meta name="keywords" content="rust, rustlang, rust-lang, Reseeder"><title>rand::reseeding::Reseeder - 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 trait"><!--[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'>Trait Reseeder</p><div class="sidebar-elems"><div class="block items"><a class="sidebar-title" href="#required-methods">Required Methods</a><div class="sidebar-links"><a href="#tymethod.reseed">reseed</a></div><a class="sidebar-title" href="#implementors">Implementors</a></div><p class='location'><a href='../index.html'>rand</a>::<wbr><a href='index.html'>reseeding</a></p><script>window.sidebarCurrent = {name: 'Reseeder', ty: 'trait', 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/reseeding.rs.html#129-132' title='goto source code'>[src]</a></span><span class='in-band'>Trait <a href='../index.html'>rand</a>::<wbr><a href='index.html'>reseeding</a>::<wbr><a class="trait" href=''>Reseeder</a></span></h1><div class="docblock type-decl hidden-by-usual-hider"><pre class='rust trait'>pub trait Reseeder<R> {
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fn <a href='#tymethod.reseed' class='fnname'>reseed</a>(&mut self, rng: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&mut </a>R);
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}</pre></div><div class='docblock'><p>Something that can be used to reseed an RNG via <code>ReseedingRng</code>.</p>
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<h1 id="example" class="section-header"><a href="#example">Example</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">SeedableRng</span>, <span class="ident">StdRng</span>};
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<span class="kw">use</span> <span class="ident">rand</span>::<span class="ident">reseeding</span>::{<span class="ident">Reseeder</span>, <span class="ident">ReseedingRng</span>};
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<span class="kw">struct</span> <span class="ident">TickTockReseeder</span> { <span class="ident">tick</span>: <span class="ident">bool</span> }
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<span class="kw">impl</span> <span class="ident">Reseeder</span><span class="op"><</span><span class="ident">StdRng</span><span class="op">></span> <span class="kw">for</span> <span class="ident">TickTockReseeder</span> {
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<span class="kw">fn</span> <span class="ident">reseed</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">rng</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">StdRng</span>) {
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<span class="kw">let</span> <span class="ident">val</span> <span class="op">=</span> <span class="kw">if</span> <span class="self">self</span>.<span class="ident">tick</span> {<span class="number">0</span>} <span class="kw">else</span> {<span class="number">1</span>};
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<span class="ident">rng</span>.<span class="ident">reseed</span>(<span class="kw-2">&</span>[<span class="ident">val</span>]);
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<span class="self">self</span>.<span class="ident">tick</span> <span class="op">=</span> <span class="op">!</span><span class="self">self</span>.<span class="ident">tick</span>;
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}
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}
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<span class="kw">fn</span> <span class="ident">main</span>() {
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<span class="kw">let</span> <span class="ident">rsdr</span> <span class="op">=</span> <span class="ident">TickTockReseeder</span> { <span class="ident">tick</span>: <span class="bool-val">true</span> };
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<span class="kw">let</span> <span class="ident">inner</span> <span class="op">=</span> <span class="ident">StdRng</span>::<span class="ident">new</span>().<span class="ident">unwrap</span>();
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<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">rng</span> <span class="op">=</span> <span class="ident">ReseedingRng</span>::<span class="ident">new</span>(<span class="ident">inner</span>, <span class="number">10</span>, <span class="ident">rsdr</span>);
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<span class="comment">// this will repeat, because it gets reseeded very regularly.</span>
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<span class="kw">let</span> <span class="ident">s</span>: <span class="ident">String</span> <span class="op">=</span> <span class="ident">rng</span>.<span class="ident">gen_ascii_chars</span>().<span class="ident">take</span>(<span class="number">100</span>).<span class="ident">collect</span>();
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<span class="macro">println</span><span class="macro">!</span>(<span class="string">"{}"</span>, <span class="ident">s</span>);
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}
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</pre></div>
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</div>
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<h2 id='required-methods' class='small-section-header'>Required methods<a href='#required-methods' class='anchor'></a></h2><div class='methods'><h3 id='tymethod.reseed' class='method'><code id='reseed.v'>fn <a href='#tymethod.reseed' class='fnname'>reseed</a>(&mut self, rng: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&mut </a>R)</code></h3><div class='docblock'><p>Reseed the given RNG.</p>
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</div></div><span class='loading-content'>Loading content...</span>
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<h2 id='implementors' class='small-section-header'>Implementors<a href='#implementors' class='anchor'></a></h2><div class='item-list' id='implementors-list'><h3 id='impl-Reseeder%3CR%3E' class='impl'><code class='in-band'>impl<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/default/trait.Default.html" title="trait core::default::Default">Default</a>> Reseeder<R> for <a class="struct" href="../../rand/reseeding/struct.ReseedWithDefault.html" title="struct rand::reseeding::ReseedWithDefault">ReseedWithDefault</a></code><a href='#impl-Reseeder%3CR%3E' class='anchor'></a><a class='srclink' href='../../src/rand/reseeding.rs.html#139-143' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.reseed' class="method hidden"><code id='reseed.v-1'>fn <a href='#method.reseed' class='fnname'>reseed</a>(&mut self, rng: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&mut </a>R)</code><a class='srclink' href='../../src/rand/reseeding.rs.html#140-142' title='goto source code'>[src]</a></h4></div></div><span class='loading-content'>Loading content...</span><script type="text/javascript">window.inlined_types=new Set([]);</script><script type="text/javascript" async
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src="../../implementors/rand/reseeding/trait.Reseeder.js">
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