mentat/rand/reseeding/trait.Reseeder.html

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2018-08-22 17:04:13 +00:00
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<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>
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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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</span><a class='srclink' href='../../src/rand/reseeding.rs.html#129-132' title='goto source code'>[src]</a></span></h1>
<pre class='rust trait'>pub trait Reseeder&lt;R&gt; {
fn <a href='#tymethod.reseed' class='fnname'>reseed</a>(&amp;mut self, rng: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;mut </a>R);
}</pre><div class='docblock'><p>Something that can be used to reseed an RNG via <code>ReseedingRng</code>.</p>
<h1 id="example" class="section-header"><a href="#example">Example</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">SeedableRng</span>, <span class="ident">StdRng</span>};
<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>};
<span class="kw">struct</span> <span class="ident">TickTockReseeder</span> { <span class="ident">tick</span>: <span class="ident">bool</span> }
<span class="kw">impl</span> <span class="ident">Reseeder</span><span class="op">&lt;</span><span class="ident">StdRng</span><span class="op">&gt;</span> <span class="kw">for</span> <span class="ident">TickTockReseeder</span> {
<span class="kw">fn</span> <span class="ident">reseed</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">rng</span>: <span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">StdRng</span>) {
<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>};
<span class="ident">rng</span>.<span class="ident">reseed</span>(<span class="kw-2">&amp;</span>[<span class="ident">val</span>]);
<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>;
}
}
<span class="kw">fn</span> <span class="ident">main</span>() {
<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> };
<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>();
<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>);
<span class="comment">// this will repeat, because it gets reseeded very regularly.</span>
<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>();
<span class="macro">println</span><span class="macro">!</span>(<span class="string">&quot;{}&quot;</span>, <span class="ident">s</span>);
}
</pre>
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<h2 id='required-methods' class='small-section-header'>
Required Methods<a href='#required-methods' class='anchor'></a>
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<h3 id='tymethod.reseed' class='method'><span id='reseed.v' class='invisible'><code>fn <a href='#tymethod.reseed' class='fnname'>reseed</a>(&amp;mut self, rng: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;mut </a>R)</code></span></h3><div class='docblock'><p>Reseed the given RNG.</p>
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<li><div class='out-of-band'><a class='srclink' href='../../src/rand/reseeding.rs.html#139-143' title='goto source code'>[src]</a></div><code>impl&lt;R&gt; Reseeder&lt;R&gt; for <a class="struct" href="../../rand/reseeding/struct.ReseedWithDefault.html" title="struct rand::reseeding::ReseedWithDefault">ReseedWithDefault</a> <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;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>,&nbsp;</span></code></li>
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