150 lines
8.2 KiB
HTML
150 lines
8.2 KiB
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<meta name="keywords" content="rust, rustlang, rust-lang, Reseeder">
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<title>rand::reseeding::Reseeder - Rust</title>
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<a href='../../rand/index.html'><img src='https://www.rust-lang.org/logos/rust-logo-128x128-blk.png' alt='logo' width='100'></a>
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<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>
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<section id='main' class="content trait">
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<h1 class='fqn'><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><span class='out-of-band'><span id='render-detail'>
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<a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">
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[<span class='inner'>−</span>]
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</a>
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</span><a id='src-907' class='srclink' href='../../src/rand/reseeding.rs.html#128-131' title='goto source code'>[src]</a></span></h1>
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<pre class='rust trait'>pub trait Reseeder<R> {
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fn <a href='#tymethod.reseed' class='fnname'>reseed</a>(&mut self, rng: &mut R);
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}</pre><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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<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='boolval'>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>
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</div>
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<h2 id='required-methods'>Required Methods</h2>
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<div class='methods'>
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<h3 id='tymethod.reseed' class='method stab '><code>fn <a href='#tymethod.reseed' class='fnname'>reseed</a>(&mut self, rng: &mut R)</code></h3><div class='docblock'><p>Reseed the given RNG.</p>
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</div></div>
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<h2 id='implementors'>Implementors</h2>
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<ul class='item-list' id='implementors-list'>
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<li><code>impl<R: <a class='trait' href='../../rand/trait.Rng.html' title='rand::Rng'>Rng</a> + <a class='trait' href='https://doc.rust-lang.org/nightly/core/default/trait.Default.html' title='core::default::Default'>Default</a>> Reseeder for <a class='struct' href='../../rand/reseeding/struct.ReseedWithDefault.html' title='rand::reseeding::ReseedWithDefault'>ReseedWithDefault</a></code></li>
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</ul><script type="text/javascript" async
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src="../../implementors/rand/reseeding/trait.Reseeder.js">
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