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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 `RngCore` trait in crate `rand`."><meta name="keywords" content="rust, rustlang, rust-lang, RngCore"><title>rand::RngCore - 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 RngCore</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.fill_bytes">fill_bytes</a><a href="#tymethod.next_u32">next_u32</a><a href="#tymethod.next_u64">next_u64</a><a href="#tymethod.try_fill_bytes">try_fill_bytes</a></div><a class="sidebar-title" href="#foreign-impls">Implementations on Foreign Types</a><div class="sidebar-links"><a href="#impl-RngCore-for-%26%27a%20mut%20R">&'a mut R</a><a href="#impl-RngCore-for-BlockRng%3CR%3E">BlockRng<R></a><a href="#impl-RngCore-for-BlockRng64%3CR%3E">BlockRng64<R></a><a href="#impl-RngCore-for-Box%3CR%3E">Box<R></a><a href="#impl-RngCore-for-ChaCha12Rng">ChaCha12Rng</a><a href="#impl-RngCore-for-ChaCha20Rng">ChaCha20Rng</a><a href="#impl-RngCore-for-ChaCha8Rng">ChaCha8Rng</a></div><a class="sidebar-title" href="#implementors">Implementors</a><a class="sidebar-title" href="#implementations">Trait Implementations</a><div class="sidebar-links"><a href="#impl-Read">Read</a></div></div><p class='location'><a href='index.html'>rand</a></p><script>window.sidebarCurrent = {name: 'RngCore', 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_core/lib.rs.html#138-185' title='goto source code'>[src]</a></span><span class='in-band'>Trait <a href='index.html'>rand</a>::<wbr><a class="trait" href=''>RngCore</a></span></h1><div class="docblock type-decl hidden-by-usual-hider"><pre class='rust trait'>pub trait RngCore {
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fn <a href='#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>;
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<div class='item-spacer'></div> fn <a href='#tymethod.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>;
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<div class='item-spacer'></div> fn <a href='#tymethod.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>);
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<div class='item-spacer'></div> fn <a href='#tymethod.try_fill_bytes' class='fnname'>try_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>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, <a class="struct" href="../rand/struct.Error.html" title="struct rand::Error">Error</a>>;
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}</pre></div><div class='docblock'><p>The core of a random number generator.</p>
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<p>This trait encapsulates the low-level functionality common to all
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generators, and is the "back end", to be implemented by generators.
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End users should normally use the <code>Rng</code> trait from the <a href="https://docs.rs/rand"><code>rand</code></a> crate,
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which is automatically implemented for every type implementing <code>RngCore</code>.</p>
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<p>Three different methods for generating random data are provided since the
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optimal implementation of each is dependent on the type of generator. There
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is no required relationship between the output of each; e.g. many
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implementations of <a href="RngCore::fill_bytes"><code>fill_bytes</code></a> consume a whole number of <code>u32</code> or <code>u64</code>
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values and drop any remaining unused bytes.</p>
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<p>The <a href="RngCore::try_fill_bytes"><code>try_fill_bytes</code></a> method is a variant of <a href="RngCore::fill_bytes"><code>fill_bytes</code></a> allowing error
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handling; it is not deemed sufficiently useful to add equivalents for
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<a href="RngCore::next_u32"><code>next_u32</code></a> or <a href="RngCore::next_u64"><code>next_u64</code></a> since the latter methods are almost always used
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with algorithmic generators (PRNGs), which are normally infallible.</p>
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<p>Algorithmic generators implementing [<code>SeedableRng</code>] should normally have
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<em>portable, reproducible</em> output, i.e. fix Endianness when converting values
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to avoid platform differences, and avoid making any changes which affect
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output (except by communicating that the release has breaking changes).</p>
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<p>Typically implementators will implement only one of the methods available
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in this trait directly, then use the helper functions from the
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[<code>impls</code>] module to implement the other methods.</p>
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<p>It is recommended that implementations also implement:</p>
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<ul>
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<li><code>Debug</code> with a custom implementation which <em>does not</em> print any internal
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state (at least, [<code>CryptoRng</code>]s should not risk leaking state through
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<code>Debug</code>).</li>
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<li><code>Serialize</code> and <code>Deserialize</code> (from Serde), preferably making Serde
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support optional at the crate level in PRNG libs.</li>
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<li><code>Clone</code>, if possible.</li>
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<li><em>never</em> implement <code>Copy</code> (accidental copies may cause repeated values).</li>
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<li><em>do not</em> implement <code>Default</code> for pseudorandom generators, but instead
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implement [<code>SeedableRng</code>], to guide users towards proper seeding.
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External / hardware RNGs can choose to implement <code>Default</code>.</li>
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<li><code>Eq</code> and <code>PartialEq</code> could be implemented, but are probably not useful.</li>
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</ul>
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<h1 id="example" class="section-header"><a href="#example">Example</a></h1>
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<p>A simple example, obviously not generating very <em>random</em> output:</p>
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<div class="example-wrap"><pre class="rust rust-example-rendered">
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<span class="attribute">#![<span class="ident">allow</span>(<span class="ident">dead_code</span>)]</span>
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<span class="kw">use</span> <span class="ident">rand_core</span>::{<span class="ident">RngCore</span>, <span class="ident">Error</span>, <span class="ident">impls</span>};
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<span class="kw">struct</span> <span class="ident">CountingRng</span>(<span class="ident">u64</span>);
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<span class="kw">impl</span> <span class="ident">RngCore</span> <span class="kw">for</span> <span class="ident">CountingRng</span> {
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<span class="kw">fn</span> <span class="ident">next_u32</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="ident">u32</span> {
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<span class="self">self</span>.<span class="ident">next_u64</span>() <span class="kw">as</span> <span class="ident">u32</span>
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}
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<span class="kw">fn</span> <span class="ident">next_u64</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="ident">u64</span> {
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<span class="self">self</span>.<span class="number">0</span> <span class="op">+=</span> <span class="number">1</span>;
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<span class="self">self</span>.<span class="number">0</span>
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}
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<span class="kw">fn</span> <span class="ident">fill_bytes</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">dest</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> [<span class="ident">u8</span>]) {
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<span class="ident">impls</span>::<span class="ident">fill_bytes_via_next</span>(<span class="self">self</span>, <span class="ident">dest</span>)
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}
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<span class="kw">fn</span> <span class="ident">try_fill_bytes</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">dest</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> [<span class="ident">u8</span>]) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span>(), <span class="ident">Error</span><span class="op">></span> {
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<span class="prelude-val">Ok</span>(<span class="self">self</span>.<span class="ident">fill_bytes</span>(<span class="ident">dest</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.next_u32' class='method'><code id='next_u32.v'>fn <a href='#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></h3><div class='docblock'><p>Return the next random <code>u32</code>.</p>
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<p>RNGs must implement at least one method from this trait directly. In
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the case this method is not implemented directly, it can be implemented
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using <code>self.next_u64() as u32</code> or via
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[<code>fill_bytes</code>][impls::next_u32_via_fill].</p>
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</div><h3 id='tymethod.next_u64' class='method'><code id='next_u64.v'>fn <a href='#tymethod.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></h3><div class='docblock'><p>Return the next random <code>u64</code>.</p>
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<p>RNGs must implement at least one method from this trait directly. In
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the case this method is not implemented directly, it can be implemented
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via [<code>next_u32</code>][impls::next_u64_via_u32] or via
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[<code>fill_bytes</code>][impls::next_u64_via_fill].</p>
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</div><h3 id='tymethod.fill_bytes' class='method'><code id='fill_bytes.v'>fn <a href='#tymethod.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></h3><div class='docblock'><p>Fill <code>dest</code> with random data.</p>
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<p>RNGs must implement at least one method from this trait directly. In
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the case this method is not implemented directly, it can be implemented
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via [<code>next_u*</code>][impls::fill_bytes_via_next] or
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via [<code>try_fill_bytes</code>][RngCore::try_fill_bytes]; if this generator can
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fail the implementation must choose how best to handle errors here
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(e.g. panic with a descriptive message or log a warning and retry a few
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times).</p>
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<p>This method should guarantee that <code>dest</code> is entirely filled
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with new data, and may panic if this is impossible
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(e.g. reading past the end of a file that is being used as the
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source of randomness).</p>
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</div><h3 id='tymethod.try_fill_bytes' class='method'><code id='try_fill_bytes.v'>fn <a href='#tymethod.try_fill_bytes' class='fnname'>try_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>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, <a class="struct" href="../rand/struct.Error.html" title="struct rand::Error">Error</a>></code></h3><div class='docblock'><p>Fill <code>dest</code> entirely with random data.</p>
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<p>This is the only method which allows an RNG to report errors while
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generating random data thus making this the primary method implemented
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by external (true) RNGs (e.g. <code>OsRng</code>) which can fail. It may be used
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directly to generate keys and to seed (infallible) PRNGs.</p>
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<p>Other than error handling, this method is identical to <a href="RngCore::fill_bytes"><code>fill_bytes</code></a>;
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thus this may be implemented using <code>Ok(self.fill_bytes(dest))</code> or
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<code>fill_bytes</code> may be implemented with
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<code>self.try_fill_bytes(dest).unwrap()</code> or more specific error handling.</p>
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</div></div><span class='loading-content'>Loading content...</span><h2 id='implementations' class='small-section-header'>Trait Implementations<a href='#implementations' class='anchor'></a></h2><div id='implementations-list'><h3 id='impl-Read' class='impl'><code class='in-band'>impl <a class="trait" href="https://doc.rust-lang.org/nightly/std/io/trait.Read.html" title="trait std::io::Read">Read</a> for dyn <a class="trait" href="../rand/trait.RngCore.html" title="trait rand::RngCore">RngCore</a> + 'static</code><a href='#impl-Read' class='anchor'></a><a class='srclink' href='../src/rand_core/lib.rs.html#438-443' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.read' class="method hidden"><code id='read.v'>fn <a href='https://doc.rust-lang.org/nightly/std/io/trait.Read.html#tymethod.read' class='fnname'>read</a>(&mut self, buf: <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>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>, <a class="struct" href="https://doc.rust-lang.org/nightly/std/io/error/struct.Error.html" title="struct std::io::error::Error">Error</a>></code><a class='srclink' href='../src/rand_core/lib.rs.html#439-442' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Pull some bytes from this source into the specified buffer, returning how many bytes were read. <a href="https://doc.rust-lang.org/nightly/std/io/trait.Read.html#tymethod.read">Read more</a></p>
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</div><h4 id='method.read_vectored' class="method"><code id='read_vectored.v'>fn <a href='https://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_vectored' class='fnname'>read_vectored</a>(&mut self, bufs: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&mut [</a><a class="struct" href="https://doc.rust-lang.org/nightly/std/io/struct.IoSliceMut.html" title="struct std::io::IoSliceMut">IoSliceMut</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>, <a class="struct" href="https://doc.rust-lang.org/nightly/std/io/error/struct.Error.html" title="struct std::io::error::Error">Error</a>></code><span class='since' title='Stable since Rust version 1.36.0'>1.36.0</span><a class='srclink' href='https://doc.rust-lang.org/nightly/src/std/io/mod.rs.html#558-560' title='goto source code'>[src]</a></h4><div class='docblock'><p>Like <code>read</code>, except that it reads into a slice of buffers. <a href="https://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_vectored">Read more</a></p>
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</div><h4 id='method.initializer' class="method"><code id='initializer.v'>unsafe fn <a href='https://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.initializer' class='fnname'>initializer</a>(&self) -> <a class="struct" href="https://doc.rust-lang.org/nightly/std/io/struct.Initializer.html" title="struct std::io::Initializer">Initializer</a></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/std/io/mod.rs.html#586-588' title='goto source code'>[src]</a></h4><div class='stability'><div class='stab unstable'><span class='emoji'>🔬</span> This is a nightly-only experimental API. (<code>read_initializer</code>)</div></div><div class='docblock'><p>Determines if this <code>Read</code>er can work with buffers of uninitialized memory. <a href="https://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.initializer">Read more</a></p>
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</div><h4 id='method.read_to_end' class="method"><code id='read_to_end.v'>fn <a href='https://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_to_end' class='fnname'>read_to_end</a>(&mut self, buf: &mut <a class="struct" href="https://doc.rust-lang.org/nightly/alloc/vec/struct.Vec.html" title="struct alloc::vec::Vec">Vec</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a>>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>, <a class="struct" href="https://doc.rust-lang.org/nightly/std/io/error/struct.Error.html" title="struct std::io::error::Error">Error</a>></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/std/io/mod.rs.html#638-640' title='goto source code'>[src]</a></h4><div class='docblock'><p>Read all bytes until EOF in this source, placing them into <code>buf</code>. <a href="https://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_to_end">Read more</a></p>
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</div><h4 id='method.read_to_string' class="method"><code id='read_to_string.v'>fn <a href='https://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_to_string' class='fnname'>read_to_string</a>(&mut self, buf: &mut <a class="struct" href="https://doc.rust-lang.org/nightly/alloc/string/struct.String.html" title="struct alloc::string::String">String</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>, <a class="struct" href="https://doc.rust-lang.org/nightly/std/io/error/struct.Error.html" title="struct std::io::error::Error">Error</a>></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/std/io/mod.rs.html#681-692' title='goto source code'>[src]</a></h4><div class='docblock'><p>Read all bytes until EOF in this source, appending them to <code>buf</code>. <a href="https://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_to_string">Read more</a></p>
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</div><h4 id='method.read_exact' class="method"><code id='read_exact.v'>fn <a href='https://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_exact' class='fnname'>read_exact</a>(&mut self, buf: <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>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, <a class="struct" href="https://doc.rust-lang.org/nightly/std/io/error/struct.Error.html" title="struct std::io::error::Error">Error</a>></code><span class='since' title='Stable since Rust version 1.6.0'>1.6.0</span><a class='srclink' href='https://doc.rust-lang.org/nightly/src/std/io/mod.rs.html#744-759' title='goto source code'>[src]</a></h4><div class='docblock'><p>Read the exact number of bytes required to fill <code>buf</code>. <a href="https://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_exact">Read more</a></p>
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</div><h4 id='method.by_ref' class="method"><code id='by_ref.v'>fn <a href='https://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.by_ref' class='fnname'>by_ref</a>(&mut self) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&mut </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/std/io/mod.rs.html#796' title='goto source code'>[src]</a></h4><div class='docblock'><p>Creates a "by reference" adaptor for this instance of <code>Read</code>. <a href="https://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.by_ref">Read more</a></p>
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</div><h4 id='method.bytes' class="method"><code id='bytes.v'>fn <a href='https://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.bytes' class='fnname'>bytes</a>(self) -> <a class="struct" href="https://doc.rust-lang.org/nightly/std/io/struct.Bytes.html" title="struct std::io::Bytes">Bytes</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/std/io/mod.rs.html#833-835' title='goto source code'>[src]</a></h4><div class='docblock'><p>Transforms this <code>Read</code> instance to an [<code>Iterator</code>] over its bytes. <a href="https://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.bytes">Read more</a></p>
|
||
</div><h4 id='method.chain' class="method"><code id='chain.v'>fn <a href='https://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.chain' class='fnname'>chain</a><R>(self, next: R) -> <a class="struct" href="https://doc.rust-lang.org/nightly/std/io/struct.Chain.html" title="struct std::io::Chain">Chain</a><Self, R> <span class="where fmt-newline">where<br> R: <a class="trait" href="https://doc.rust-lang.org/nightly/std/io/trait.Read.html" title="trait std::io::Read">Read</a>, </span></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/std/io/mod.rs.html#868-870' title='goto source code'>[src]</a></h4><div class='docblock'><p>Creates an adaptor which will chain this stream with another. <a href="https://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.chain">Read more</a></p>
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</div><h4 id='method.take' class="method"><code id='take.v'>fn <a href='https://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.take' class='fnname'>take</a>(self, limit: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u64.html">u64</a>) -> <a class="struct" href="https://doc.rust-lang.org/nightly/std/io/struct.Take.html" title="struct std::io::Take">Take</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/std/io/mod.rs.html#904-906' title='goto source code'>[src]</a></h4><div class='docblock'><p>Creates an adaptor which will read at most <code>limit</code> bytes from it. <a href="https://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.take">Read more</a></p>
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||
</div></div></div>
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<h2 id='foreign-impls' class='small-section-header'>Implementations on Foreign Types<a href='#foreign-impls' class='anchor'></a></h2><h3 id='impl-RngCore-for-BlockRng%3CR%3E' class='impl'><code class='in-band'>impl<R> <a class="trait" href="../rand/trait.RngCore.html" title="trait rand::RngCore">RngCore</a> for <a class="struct" href="../rand_core/block/struct.BlockRng.html" title="struct rand_core::block::BlockRng">BlockRng</a><R> <span class="where fmt-newline">where<br> R: <a class="trait" href="../rand_core/block/trait.BlockRngCore.html" title="trait rand_core::block::BlockRngCore">BlockRngCore</a><Item = <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u32.html">u32</a>>,<br> <R as <a class="trait" href="../rand_core/block/trait.BlockRngCore.html" title="trait rand_core::block::BlockRngCore">BlockRngCore</a>>::<a class="type" href="../rand_core/block/trait.BlockRngCore.html#associatedtype.Results" title="type rand_core::block::BlockRngCore::Results">Results</a>: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.AsRef.html" title="trait core::convert::AsRef">AsRef</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">[</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>>,<br> <R as <a class="trait" href="../rand_core/block/trait.BlockRngCore.html" title="trait rand_core::block::BlockRngCore">BlockRngCore</a>>::<a class="type" href="../rand_core/block/trait.BlockRngCore.html#associatedtype.Results" title="type rand_core::block::BlockRngCore::Results">Results</a>: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.AsMut.html" title="trait core::convert::AsMut">AsMut</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">[</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>>, </span></code><a href='#impl-RngCore-for-BlockRng%3CR%3E' class='anchor'></a><a class='srclink' href='../src/rand_core/block.rs.html#171-237' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.next_u32' class="method hidden"><code id='next_u32.v-1'>fn <a href='#method.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_core/block.rs.html#175-183' title='goto source code'>[src]</a></h4><h4 id='method.next_u64' class="method hidden"><code id='next_u64.v-1'>fn <a href='#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_core/block.rs.html#186-215' title='goto source code'>[src]</a></h4><h4 id='method.fill_bytes' class="method hidden"><code id='fill_bytes.v-1'>fn <a href='#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_core/block.rs.html#218-231' title='goto source code'>[src]</a></h4><h4 id='method.try_fill_bytes' class="method hidden"><code id='try_fill_bytes.v-1'>fn <a href='#method.try_fill_bytes' class='fnname'>try_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>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, <a class="struct" href="../rand/struct.Error.html" title="struct rand::Error">Error</a>></code><a class='srclink' href='../src/rand_core/block.rs.html#234-236' title='goto source code'>[src]</a></h4></div><h3 id='impl-RngCore-for-Box%3CR%3E' class='impl'><code class='in-band'>impl<R> <a class="trait" href="../rand/trait.RngCore.html" title="trait rand::RngCore">RngCore</a> for <a class="struct" href="https://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html" title="struct alloc::boxed::Box">Box</a><R> <span class="where fmt-newline">where<br> R: <a class="trait" href="../rand/trait.RngCore.html" title="trait rand::RngCore">RngCore</a> + ?<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-RngCore-for-Box%3CR%3E' class='anchor'></a><a class='srclink' href='../src/rand_core/lib.rs.html#415-435' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.next_u32-1' class="method hidden"><code id='next_u32.v-2'>fn <a href='#method.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_core/lib.rs.html#417-419' title='goto source code'>[src]</a></h4><h4 id='method.next_u64-1' class="method hidden"><code id='next_u64.v-2'>fn <a href='#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_core/lib.rs.html#422-424' title='goto source code'>[src]</a></h4><h4 id='method.fill_bytes-1' class="method hidden"><code id='fill_bytes.v-2'>fn <a href='#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_core/lib.rs.html#427-429' title='goto source code'>[src]</a></h4><h4 id='method.try_fill_bytes-1' class="method hidden"><code id='try_fill_bytes.v-2'>fn <a href='#method.try_fill_bytes' class='fnname'>try_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>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, <a class="struct" href="../rand/struct.Error.html" title="struct rand::Error">Error</a>></code><a class='srclink' href='../src/rand_core/lib.rs.html#432-434' title='goto source code'>[src]</a></h4></div><h3 id='impl-RngCore-for-BlockRng64%3CR%3E' class='impl'><code class='in-band'>impl<R> <a class="trait" href="../rand/trait.RngCore.html" title="trait rand::RngCore">RngCore</a> for <a class="struct" href="../rand_core/block/struct.BlockRng64.html" title="struct rand_core::block::BlockRng64">BlockRng64</a><R> <span class="where fmt-newline">where<br> R: <a class="trait" href="../rand_core/block/trait.BlockRngCore.html" title="trait rand_core::block::BlockRngCore">BlockRngCore</a><Item = <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u64.html">u64</a>>,<br> <R as <a class="trait" href="../rand_core/block/trait.BlockRngCore.html" title="trait rand_core::block::BlockRngCore">BlockRngCore</a>>::<a class="type" href="../rand_core/block/trait.BlockRngCore.html#associatedtype.Results" title="type rand_core::block::BlockRngCore::Results">Results</a>: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.AsRef.html" title="trait core::convert::AsRef">AsRef</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">[</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u64.html">u64</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>>,<br> <R as <a class="trait" href="../rand_core/block/trait.BlockRngCore.html" title="trait rand_core::block::BlockRngCore">BlockRngCore</a>>::<a class="type" href="../rand_core/block/trait.BlockRngCore.html#associatedtype.Results" title="type rand_core::block::BlockRngCore::Results">Results</a>: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.AsMut.html" title="trait core::convert::AsMut">AsMut</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">[</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u64.html">u64</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>>, </span></code><a href='#impl-RngCore-for-BlockRng64%3CR%3E' class='anchor'></a><a class='srclink' href='../src/rand_core/block.rs.html#347-412' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.next_u32-2' class="method hidden"><code id='next_u32.v-3'>fn <a href='#method.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_core/block.rs.html#351-374' title='goto source code'>[src]</a></h4><h4 id='method.next_u64-2' class="method hidden"><code id='next_u64.v-3'>fn <a href='#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_core/block.rs.html#377-387' title='goto source code'>[src]</a></h4><h4 id='method.fill_bytes-2' class="method hidden"><code id='fill_bytes.v-3'>fn <a href='#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_core/block.rs.html#390-406' title='goto source code'>[src]</a></h4><h4 id='method.try_fill_bytes-2' class="method hidden"><code id='try_fill_bytes.v-3'>fn <a href='#method.try_fill_bytes' class='fnname'>try_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>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, <a class="struct" href="../rand/struct.Error.html" title="struct rand::Error">Error</a>></code><a class='srclink' href='../src/rand_core/block.rs.html#409-411' title='goto source code'>[src]</a></h4></div><h3 id='impl-RngCore-for-%26%27a%20mut%20R' class='impl'><code class='in-band'>impl<'a, R> <a class="trait" href="../rand/trait.RngCore.html" title="trait rand::RngCore">RngCore</a> for <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&'a mut </a>R <span class="where fmt-newline">where<br> R: <a class="trait" href="../rand/trait.RngCore.html" title="trait rand::RngCore">RngCore</a> + ?<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-RngCore-for-%26%27a%20mut%20R' class='anchor'></a><a class='srclink' href='../src/rand_core/lib.rs.html#389-409' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.next_u32-3' class="method hidden"><code id='next_u32.v-4'>fn <a href='#method.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_core/lib.rs.html#391-393' title='goto source code'>[src]</a></h4><h4 id='method.next_u64-3' class="method hidden"><code id='next_u64.v-4'>fn <a href='#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_core/lib.rs.html#396-398' title='goto source code'>[src]</a></h4><h4 id='method.fill_bytes-3' class="method hidden"><code id='fill_bytes.v-4'>fn <a href='#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_core/lib.rs.html#401-403' title='goto source code'>[src]</a></h4><h4 id='method.try_fill_bytes-3' class="method hidden"><code id='try_fill_bytes.v-4'>fn <a href='#method.try_fill_bytes' class='fnname'>try_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>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, <a class="struct" href="../rand/struct.Error.html" title="struct rand::Error">Error</a>></code><a class='srclink' href='../src/rand_core/lib.rs.html#406-408' title='goto source code'>[src]</a></h4></div><h3 id='impl-RngCore-for-ChaCha12Rng' class='impl'><code class='in-band'>impl <a class="trait" href="../rand/trait.RngCore.html" title="trait rand::RngCore">RngCore</a> for <a class="struct" href="../rand_chacha/chacha/struct.ChaCha12Rng.html" title="struct rand_chacha::chacha::ChaCha12Rng">ChaCha12Rng</a></code><a href='#impl-RngCore-for-ChaCha12Rng' class='anchor'></a><a class='srclink' href='../src/rand_chacha/chacha.rs.html#152-169' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.next_u32-4' class="method hidden"><code id='next_u32.v-5'>fn <a href='#method.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_chacha/chacha.rs.html#154-156' title='goto source code'>[src]</a></h4><h4 id='method.next_u64-4' class="method hidden"><code id='next_u64.v-5'>fn <a href='#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_chacha/chacha.rs.html#158-160' title='goto source code'>[src]</a></h4><h4 id='method.fill_bytes-4' class="method hidden"><code id='fill_bytes.v-5'>fn <a href='#method.fill_bytes' class='fnname'>fill_bytes</a>(&mut self, bytes: <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_chacha/chacha.rs.html#162-164' title='goto source code'>[src]</a></h4><h4 id='method.try_fill_bytes-4' class="method hidden"><code id='try_fill_bytes.v-5'>fn <a href='#method.try_fill_bytes' class='fnname'>try_fill_bytes</a>(&mut self, bytes: <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>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, <a class="struct" href="../rand/struct.Error.html" title="struct rand::Error">Error</a>></code><a class='srclink' href='../src/rand_chacha/chacha.rs.html#166-168' title='goto source code'>[src]</a></h4></div><h3 id='impl-RngCore-for-ChaCha8Rng' class='impl'><code class='in-band'>impl <a class="trait" href="../rand/trait.RngCore.html" title="trait rand::RngCore">RngCore</a> for <a class="struct" href="../rand_chacha/chacha/struct.ChaCha8Rng.html" title="struct rand_chacha::chacha::ChaCha8Rng">ChaCha8Rng</a></code><a href='#impl-RngCore-for-ChaCha8Rng' class='anchor'></a><a class='srclink' href='../src/rand_chacha/chacha.rs.html#152-169' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.next_u32-5' class="method hidden"><code id='next_u32.v-6'>fn <a href='#method.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_chacha/chacha.rs.html#154-156' title='goto source code'>[src]</a></h4><h4 id='method.next_u64-5' class="method hidden"><code id='next_u64.v-6'>fn <a href='#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_chacha/chacha.rs.html#158-160' title='goto source code'>[src]</a></h4><h4 id='method.fill_bytes-5' class="method hidden"><code id='fill_bytes.v-6'>fn <a href='#method.fill_bytes' class='fnname'>fill_bytes</a>(&mut self, bytes: <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_chacha/chacha.rs.html#162-164' title='goto source code'>[src]</a></h4><h4 id='method.try_fill_bytes-5' class="method hidden"><code id='try_fill_bytes.v-6'>fn <a href='#method.try_fill_bytes' class='fnname'>try_fill_bytes</a>(&mut self, bytes: <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>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, <a class="struct" href="../rand/struct.Error.html" title="struct rand::Error">Error</a>></code><a class='srclink' href='../src/rand_chacha/chacha.rs.html#166-168' title='goto source code'>[src]</a></h4></div><h3 id='impl-RngCore-for-ChaCha20Rng' class='impl'><code class='in-band'>impl <a class="trait" href="../rand/trait.RngCore.html" title="trait rand::RngCore">RngCore</a> for <a class="struct" href="../rand_chacha/chacha/struct.ChaCha20Rng.html" title="struct rand_chacha::chacha::ChaCha20Rng">ChaCha20Rng</a></code><a href='#impl-RngCore-for-ChaCha20Rng' class='anchor'></a><a class='srclink' href='../src/rand_chacha/chacha.rs.html#152-169' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.next_u32-6' class="method hidden"><code id='next_u32.v-7'>fn <a href='#method.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_chacha/chacha.rs.html#154-156' title='goto source code'>[src]</a></h4><h4 id='method.next_u64-6' class="method hidden"><code id='next_u64.v-7'>fn <a href='#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_chacha/chacha.rs.html#158-160' title='goto source code'>[src]</a></h4><h4 id='method.fill_bytes-6' class="method hidden"><code id='fill_bytes.v-7'>fn <a href='#method.fill_bytes' class='fnname'>fill_bytes</a>(&mut self, bytes: <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_chacha/chacha.rs.html#162-164' title='goto source code'>[src]</a></h4><h4 id='method.try_fill_bytes-6' class="method hidden"><code id='try_fill_bytes.v-7'>fn <a href='#method.try_fill_bytes' class='fnname'>try_fill_bytes</a>(&mut self, bytes: <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>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, <a class="struct" href="../rand/struct.Error.html" title="struct rand::Error">Error</a>></code><a class='srclink' href='../src/rand_chacha/chacha.rs.html#166-168' title='goto source code'>[src]</a></h4></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-RngCore' class='impl'><code class='in-band'>impl RngCore for <a class="struct" href="../rand/rngs/mock/struct.StepRng.html" title="struct rand::rngs::mock::StepRng">StepRng</a></code><a href='#impl-RngCore' class='anchor'></a><a class='srclink' href='../src/rand/rngs/mock.rs.html#41-63' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.next_u32-7' class="method hidden"><code id='next_u32.v-8'>fn <a href='#method.next_u32-7' 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/rngs/mock.rs.html#43-45' title='goto source code'>[src]</a></h4><h4 id='method.next_u64-7' class="method hidden"><code id='next_u64.v-8'>fn <a href='#method.next_u64-7' 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/rngs/mock.rs.html#48-52' title='goto source code'>[src]</a></h4><h4 id='method.fill_bytes-7' class="method hidden"><code id='fill_bytes.v-8'>fn <a href='#method.fill_bytes-7' 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/rngs/mock.rs.html#55-57' title='goto source code'>[src]</a></h4><h4 id='method.try_fill_bytes-7' class="method hidden"><code id='try_fill_bytes.v-8'>fn <a href='#method.try_fill_bytes-7' class='fnname'>try_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>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, <a class="struct" href="../rand/struct.Error.html" title="struct rand::Error">Error</a>></code><a class='srclink' href='../src/rand/rngs/mock.rs.html#60-62' title='goto source code'>[src]</a></h4></div><h3 id='impl-RngCore-1' class='impl'><code class='in-band'>impl RngCore for <a class="struct" href="../rand/rngs/struct.EntropyRng.html" title="struct rand::rngs::EntropyRng">EntropyRng</a></code><a href='#impl-RngCore-1' class='anchor'></a><a class='srclink' href='../src/rand/rngs/entropy.rs.html#46-62' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.next_u32-8' class="method hidden"><code id='next_u32.v-9'>fn <a href='#method.next_u32-8' 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/rngs/entropy.rs.html#47-49' title='goto source code'>[src]</a></h4><h4 id='method.next_u64-8' class="method hidden"><code id='next_u64.v-9'>fn <a href='#method.next_u64-8' 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/rngs/entropy.rs.html#51-53' title='goto source code'>[src]</a></h4><h4 id='method.fill_bytes-8' class="method hidden"><code id='fill_bytes.v-9'>fn <a href='#method.fill_bytes-8' 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/rngs/entropy.rs.html#55-57' title='goto source code'>[src]</a></h4><h4 id='method.try_fill_bytes-8' class="method hidden"><code id='try_fill_bytes.v-9'>fn <a href='#method.try_fill_bytes-8' class='fnname'>try_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>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, <a class="struct" href="../rand/struct.Error.html" title="struct rand::Error">Error</a>></code><a class='srclink' href='../src/rand/rngs/entropy.rs.html#59-61' title='goto source code'>[src]</a></h4></div><h3 id='impl-RngCore-2' class='impl'><code class='in-band'>impl RngCore for <a class="struct" href="../rand/rngs/struct.OsRng.html" title="struct rand::rngs::OsRng">OsRng</a></code><a href='#impl-RngCore-2' class='anchor'></a><a class='srclink' href='../src/rand/rngs/os.rs.html#62-81' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.next_u32-9' class="method hidden"><code id='next_u32.v-10'>fn <a href='#method.next_u32-9' 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/rngs/os.rs.html#63-65' title='goto source code'>[src]</a></h4><h4 id='method.next_u64-9' class="method hidden"><code id='next_u64.v-10'>fn <a href='#method.next_u64-9' 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/rngs/os.rs.html#67-69' title='goto source code'>[src]</a></h4><h4 id='method.fill_bytes-9' class="method hidden"><code id='fill_bytes.v-10'>fn <a href='#method.fill_bytes-9' 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/rngs/os.rs.html#71-75' title='goto source code'>[src]</a></h4><h4 id='method.try_fill_bytes-9' class="method hidden"><code id='try_fill_bytes.v-10'>fn <a href='#method.try_fill_bytes-9' class='fnname'>try_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>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, <a class="struct" href="../rand/struct.Error.html" title="struct rand::Error">Error</a>></code><a class='srclink' href='../src/rand/rngs/os.rs.html#77-80' title='goto source code'>[src]</a></h4></div><h3 id='impl-RngCore-3' class='impl'><code class='in-band'>impl RngCore for <a class="struct" href="../rand/rngs/struct.StdRng.html" title="struct rand::rngs::StdRng">StdRng</a></code><a href='#impl-RngCore-3' class='anchor'></a><a class='srclink' href='../src/rand/rngs/std.rs.html#36-56' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.next_u32-10' class="method hidden"><code id='next_u32.v-11'>fn <a href='#method.next_u32-10' 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/rngs/std.rs.html#38-40' title='goto source code'>[src]</a></h4><h4 id='method.next_u64-10' class="method hidden"><code id='next_u64.v-11'>fn <a href='#method.next_u64-10' 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/rngs/std.rs.html#43-45' title='goto source code'>[src]</a></h4><h4 id='method.fill_bytes-10' class="method hidden"><code id='fill_bytes.v-11'>fn <a href='#method.fill_bytes-10' 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/rngs/std.rs.html#48-50' title='goto source code'>[src]</a></h4><h4 id='method.try_fill_bytes-10' class="method hidden"><code id='try_fill_bytes.v-11'>fn <a href='#method.try_fill_bytes-10' class='fnname'>try_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>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, <a class="struct" href="../rand/struct.Error.html" title="struct rand::Error">Error</a>></code><a class='srclink' href='../src/rand/rngs/std.rs.html#53-55' title='goto source code'>[src]</a></h4></div><h3 id='impl-RngCore-4' class='impl'><code class='in-band'>impl RngCore for <a class="struct" href="../rand/rngs/struct.ThreadRng.html" title="struct rand::rngs::ThreadRng">ThreadRng</a></code><a href='#impl-RngCore-4' class='anchor'></a><a class='srclink' href='../src/rand/rngs/thread.rs.html#92-110' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.next_u32-11' class="method hidden"><code id='next_u32.v-12'>fn <a href='#method.next_u32-11' 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/rngs/thread.rs.html#94-96' title='goto source code'>[src]</a></h4><h4 id='method.next_u64-11' class="method hidden"><code id='next_u64.v-12'>fn <a href='#method.next_u64-11' 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/rngs/thread.rs.html#99-101' title='goto source code'>[src]</a></h4><h4 id='method.fill_bytes-11' class="method hidden"><code id='fill_bytes.v-12'>fn <a href='#method.fill_bytes-11' 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/rngs/thread.rs.html#103-105' title='goto source code'>[src]</a></h4><h4 id='method.try_fill_bytes-11' class="method hidden"><code id='try_fill_bytes.v-12'>fn <a href='#method.try_fill_bytes-11' class='fnname'>try_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>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, <a class="struct" href="../rand/struct.Error.html" title="struct rand::Error">Error</a>></code><a class='srclink' href='../src/rand/rngs/thread.rs.html#107-109' title='goto source code'>[src]</a></h4></div><h3 id='impl-RngCore-5' class='impl'><code class='in-band'>impl<R, Rsdr: <a class="trait" href="../rand/trait.RngCore.html" title="trait rand::RngCore">RngCore</a>> RngCore for <a class="struct" href="../rand/rngs/adapter/struct.ReseedingRng.html" title="struct rand::rngs::adapter::ReseedingRng">ReseedingRng</a><R, Rsdr> <span class="where fmt-newline">where<br> R: <a class="trait" href="../rand_core/block/trait.BlockRngCore.html" title="trait rand_core::block::BlockRngCore">BlockRngCore</a><Item = <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u32.html">u32</a>> + <a class="trait" href="../rand/trait.SeedableRng.html" title="trait rand::SeedableRng">SeedableRng</a>,<br> <R as <a class="trait" href="../rand_core/block/trait.BlockRngCore.html" title="trait rand_core::block::BlockRngCore">BlockRngCore</a>>::<a class="type" href="../rand_core/block/trait.BlockRngCore.html#associatedtype.Results" title="type rand_core::block::BlockRngCore::Results">Results</a>: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.AsRef.html" title="trait core::convert::AsRef">AsRef</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">[</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="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.AsMut.html" title="trait core::convert::AsMut">AsMut</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">[</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>>, </span></code><a href='#impl-RngCore-5' class='anchor'></a><a class='srclink' href='../src/rand/rngs/adapter/reseeding.rs.html#105-126' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.next_u32-12' class="method hidden"><code id='next_u32.v-13'>fn <a href='#method.next_u32-12' 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/rngs/adapter/reseeding.rs.html#110-112' title='goto source code'>[src]</a></h4><h4 id='method.next_u64-12' class="method hidden"><code id='next_u64.v-13'>fn <a href='#method.next_u64-12' 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/rngs/adapter/reseeding.rs.html#115-117' title='goto source code'>[src]</a></h4><h4 id='method.fill_bytes-12' class="method hidden"><code id='fill_bytes.v-13'>fn <a href='#method.fill_bytes-12' 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/rngs/adapter/reseeding.rs.html#119-121' title='goto source code'>[src]</a></h4><h4 id='method.try_fill_bytes-12' class="method hidden"><code id='try_fill_bytes.v-13'>fn <a href='#method.try_fill_bytes-12' class='fnname'>try_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>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, <a class="struct" href="../rand/struct.Error.html" title="struct rand::Error">Error</a>></code><a class='srclink' href='../src/rand/rngs/adapter/reseeding.rs.html#123-125' title='goto source code'>[src]</a></h4></div><h3 id='impl-RngCore-6' class='impl'><code class='in-band'>impl<R: <a class="trait" href="https://doc.rust-lang.org/nightly/std/io/trait.Read.html" title="trait std::io::Read">Read</a>> RngCore for <a class="struct" href="../rand/rngs/adapter/struct.ReadRng.html" title="struct rand::rngs::adapter::ReadRng">ReadRng</a><R></code><a href='#impl-RngCore-6' class='anchor'></a><a class='srclink' href='../src/rand/rngs/adapter/read.rs.html#60-79' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.next_u32-13' class="method hidden"><code id='next_u32.v-14'>fn <a href='#method.next_u32-13' 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/rngs/adapter/read.rs.html#61-63' title='goto source code'>[src]</a></h4><h4 id='method.next_u64-13' class="method hidden"><code id='next_u64.v-14'>fn <a href='#method.next_u64-13' 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/rngs/adapter/read.rs.html#65-67' title='goto source code'>[src]</a></h4><h4 id='method.fill_bytes-13' class="method hidden"><code id='fill_bytes.v-14'>fn <a href='#method.fill_bytes-13' 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/rngs/adapter/read.rs.html#69-72' title='goto source code'>[src]</a></h4><h4 id='method.try_fill_bytes-13' class="method hidden"><code id='try_fill_bytes.v-14'>fn <a href='#method.try_fill_bytes-13' class='fnname'>try_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>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, <a class="struct" href="../rand/struct.Error.html" title="struct rand::Error">Error</a>></code><a class='srclink' href='../src/rand/rngs/adapter/read.rs.html#74-78' 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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