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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 `BlockRng` struct in crate `rand_core`."><meta name="keywords" content="rust, rustlang, rust-lang, BlockRng"><title>rand_core::block::BlockRng - 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 struct"><!--[if lte IE 8]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu">&#9776;</div><a href='../../rand_core/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'>Struct BlockRng</p><div class="sidebar-elems"><div class="block items"><a class="sidebar-title" href="#fields">Fields</a><div class="sidebar-links"><a href="#structfield.core">core</a></div><a class="sidebar-title" href="#methods">Methods</a><div class="sidebar-links"><a href="#method.generate_and_set">generate_and_set</a><a href="#method.index">index</a><a href="#method.new">new</a><a href="#method.reset">reset</a></div><a class="sidebar-title" href="#implementations">Trait Implementations</a><div class="sidebar-links"><a href="#impl-Clone">Clone</a><a href="#impl-CryptoRng">CryptoRng</a><a href="#impl-Debug">Debug</a><a href="#impl-RngCore">RngCore</a><a href="#impl-SeedableRng">SeedableRng</a></div><a class="sidebar-title" href="#synthetic-implementations">Auto Trait Implementations</a><div class="sidebar-links"><a href="#impl-RefUnwindSafe">RefUnwindSafe</a><a href="#impl-Send">Send</a><a href="#impl-Sync">Sync</a><a href="#impl-Unpin">Unpin</a><a href="#impl-UnwindSafe">UnwindSafe</a></div><a class="sidebar-title" href="#blanket-implementations">Blanket Implementations</a><div class="sidebar-links"><a href="#impl-Any">Any</a><a href="#impl-Borrow%3CT%3E">Borrow&lt;T&gt;</a><a href="#impl-BorrowMut%3CT%3E">BorrowMut&lt;T&gt;</a><a href="#impl-From%3CT%3E">From&lt;T&gt;</a><a href="#impl-Into%3CU%3E">Into&lt;U&gt;</a><a href="#impl-ToOwned">ToOwned</a><a href="#impl-TryFrom%3CU%3E">TryFrom&lt;U&gt;</a><a href="#impl-TryInto%3CU%3E">TryInto&lt;U&gt;</a></div></div><p class='location'><a href='../index.html'>rand_core</a>::<wbr><a href='index.html'>block</a></p><script>window.sidebarCurrent = {name: 'BlockRng', ty: 'struct', relpath: ''};</script><script defer src="sidebar-items.js"></script></div></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!"><img src="../../brush.svg" width="18" alt="Pick another theme!"></button><div id="theme-choices"></div></div><script src="../../theme.js"></script><nav class="sub"><form class="search-form js-only"><div class="search-container"><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'>&#x2212;</span>]</a></span><a class='srclink' href='../../src/rand_core/block.rs.html#113-118' title
pub core: R,
// some fields omitted
}</pre></div><div class='docblock'><p>A wrapper type implementing [<code>RngCore</code>] for some type implementing
[<code>BlockRngCore</code>] with <code>u32</code> array buffer; i.e. this can be used to implement
a full RNG from just a <code>generate</code> function.</p>
<p>The <code>core</code> field may be accessed directly but the results buffer may not.
PRNG implementations can simply use a type alias
(<code>pub type MyRng = BlockRng&lt;MyRngCore&gt;;</code>) but might prefer to use a
wrapper type (<code>pub struct MyRng(BlockRng&lt;MyRngCore&gt;);</code>); the latter must
re-implement <code>RngCore</code> but hides the implementation details and allows
extra functionality to be defined on the RNG
(e.g. <code>impl MyRng { fn set_stream(...){...} }</code>).</p>
<p><code>BlockRng</code> has heavily optimized implementations of the [<code>RngCore</code>] methods
reading values from the results buffer, as well as
calling [<code>BlockRngCore::generate</code>] directly on the output array when
<a href="RngCore::fill_bytes"><code>fill_bytes</code></a> / <a href="RngCore::try_fill_bytes"><code>try_fill_bytes</code></a> is called on a large array. These methods
also handle the bookkeeping of when to generate a new batch of values.</p>
<p>No whole generated <code>u32</code> values are thown away and all values are consumed
in-order. <a href="RngCore::next_u32"><code>next_u32</code></a> simply takes the next available <code>u32</code> value.
<a href="RngCore::next_u64"><code>next_u64</code></a> is implemented by combining two <code>u32</code> values, least
significant first. <a href="RngCore::fill_bytes"><code>fill_bytes</code></a> and <a href="RngCore::try_fill_bytes"><code>try_fill_bytes</code></a> consume a whole
number of <code>u32</code> values, converting each <code>u32</code> to a byte slice in
little-endian order. If the requested byte length is not a multiple of 4,
some bytes will be discarded.</p>
<p>See also [<code>BlockRng64</code>] which uses <code>u64</code> array buffers. Currently there is
no direct support for other buffer types.</p>
<p>For easy initialization <code>BlockRng</code> also implements [<code>SeedableRng</code>].</p>
</div><h2 id='fields' class='fields small-section-header'>
Fields<a href='#fields' class='anchor'></a></h2><span id="structfield.core" class="structfield small-section-header"><a href="#structfield.core" class="anchor field"></a><code id="core.v">core: R</code></span><div class='docblock'><p>The <em>core</em> part of the RNG, implementing the <code>generate</code> function.</p>
</div><h2 id='methods' class='small-section-header'>Methods<a href='#methods' class='anchor'></a></h2><h3 id='impl' class='impl'><code class='in-band'>impl&lt;R&gt; <a class="struct" href="../../rand_core/block/struct.BlockRng.html" title="struct rand_core::block::BlockRng">BlockRng</a>&lt;R&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;R: <a class="trait" href="../../rand_core/block/trait.BlockRngCore.html" title="trait rand_core::block::BlockRngCore">BlockRngCore</a>,&nbsp;</span></code><a href='#impl' class='anchor'></a><a class='srclink' href='../../src/rand_core/block.rs.html#131-165' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.new' class="method"><code id='new.v'>pub fn <a href='#method.new' class='fnname'>new</a>(core: R) -&gt; <a class="struct" href="../../rand_core/block/struct.BlockRng.html" title="struct rand_core::block::BlockRng">BlockRng</a>&lt;R&gt;</code><a class='srclink' href='../../src/rand_core/block.rs.html#134-141' title='goto source code'>[src]</a></h4><div class='docblock'><p>Create a new <code>BlockRng</code> from an existing RNG implementing
<code>BlockRngCore</code>. Results will be generated on first use.</p>
</div><h4 id='method.index' class="method"><code id='index.v'>pub fn <a href='#method.index' class='fnname'>index</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a></code><a class='srclink' href='../../src/rand_core/block.rs.html#148-150' title='goto source code'>[src]</a></h4><div class='docblock'><p>Get the index into the result buffer.</p>
<p>If this is equal to or larger than the size of the result buffer then
the buffer is &quot;empty&quot; and <code>generate()</code> must be called to produce new
results.</p>
</div><h4 id='method.reset' class="method"><code id='reset.v'>pub fn <a href='#method.reset' class='fnname'>reset</a>(&amp;mut self)</code><a class='srclink' href='../../src/rand_core/block.rs.html#154-156' title='goto source code'>[src]</a></h4><div class='docblock'><p>Reset the number of available results.
This will force a new set of results to be generated on next use.</p>
</div><h4 id='method.generate_and_set' class="method"><code id='generate_and_set.v'>pub fn <a href='#method.generate_and_set' class='fnname'>generate_and_set</a>(&amp;mut self, index: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>)</code><a class='srclink' href='../../src/rand_core/block.rs.html#160-164' title='goto source code'>[src]</a></h4><div class='docblock'><p>Generate a new set of results immediately, setting the index to the
given value.</p>
</div></div><h2 id='implementations' class='small-section-header'>Trait Implementations<a href='#implementations' class='anchor'></a></h2><div id='implementations-list'><h3 id='impl-Debug' class='impl'><code class='in-band'>impl&lt;R&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html" title="trait core::fmt::Debug">Debug</a> for <a class="struct" href="../../rand_core/block/struct.BlockRng.html" title="struct rand_core::block::BlockRng">BlockRng</a>&lt;R&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;R: <a class="trait" href="../../rand_core/block/trait.BlockRngCore.html" title="trait rand_core::block::BlockRngCore">BlockRngCore</a> + <a class="trait" href="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html" title="trait core::fmt::Debug">Debug</a>,&nbsp;</span></code><a href='#impl-Debug' class='anchor'></a><a class='srclink' href='../../src/rand_core/block.rs.html#121-129' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.fmt' class="method hidden"><code id='fmt.v'>fn <a href='https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html#tymethod.fmt' class='fnname'>fmt</a>(&amp;self, fmt: &amp;mut <a class="struct" href="https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html" title="struct core::fmt::Formatter">Formatter</a>) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;<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/core/fmt/struct.Error.html" title="struct core::fmt::Error">Error</a>&gt;</code><a class='srclink' href='../../src/rand_core/block.rs.html#122-128' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Formats the value using the given formatter. <a href="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html#tymethod.fmt">Read more</a></p>
</div></div><h3 id='impl-CryptoRng' class='impl'><code class='in-band'>impl&lt;R&gt; <a class="trait" href="../../rand_core/trait.CryptoRng.html" title="trait rand_core::CryptoRng">CryptoRng</a> for <a class="struct" href="../../rand_core/block/struct.BlockRng.html" title="struct rand_core::block::BlockRng">BlockRng</a>&lt;R&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;R: <a class="trait" href="../../rand_core/block/trait.BlockRngCore.html" title="trait rand_core::block::BlockRngCore">BlockRngCore</a> + <a class="trait" href="../../rand_core/trait.CryptoRng.html" title="trait rand_core::CryptoRng">CryptoRng</a>,&nbsp;</span></code><a href='#impl-CryptoRng' class='anchor'></a><a class='srclink' href='../../src/rand_core/block.rs.html#499' title='goto source code'>[src]</a></h3><div class='impl-items'></div><h3 id='impl-Clone' class='impl'><code class='in-band'>impl&lt;R&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a> for <a class="struct" href="../../rand_core/block/struct.BlockRng.html" title="struct rand_core::block::BlockRng">BlockRng</a>&lt;R&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;R: <a class="trait" href="../../rand_core/block/trait.BlockRngCore.html" title="trait rand_core::block::BlockRngCore">BlockRngCore</a> + <a class="trait" href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a> + ?<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,<br>&nbsp;&nbsp;&nbsp;&nbsp;&lt;R as <a class="trait" href="../../rand_core/block/trait.BlockRngCore.html" title="trait rand_core::block::BlockRngCore">BlockRngCore</a>&gt;::<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/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a>,&nbsp;</span></code><a href='#impl-Clone' class='anchor'></a><a class='srclink' href='../../src/rand_core/block.rs.html#111' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.clone' class="method hidden"><code id='clone.v'>fn <a href='https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html#tymethod.clone' class='fnname'>clone</a>(&amp;self) -&gt; <a class="struct" href="../../rand_core/block/struct.BlockRng.html" title="struct rand_core::block::BlockRng">BlockRng</a>&lt;R&gt;</code><a class='srclink' href='../../src/rand_core/block.rs.html#111' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Returns a copy of the value. <a href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html#tymethod.clone">Read more</a></p>
</div><h4 id='method.clone_from' class="method hidden"><code id='clone_from.v'>fn <a href='https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html#method.clone_from' class='fnname'>clone_from</a>(&amp;mut self, source: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;</a>Self)</code><span 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/core/clone.rs.html#131-133' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Performs copy-assignment from <code>source</code>. <a href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html#method.clone_from">Read more</a></p>
</div></div><h3 id='impl-RngCore' class='impl'><code class='in-band'>impl&lt;R&gt; <a class="trait" href="../../rand_core/trait.RngCore.html" title="trait rand_core::RngCore">RngCore</a> for <a class="struct" href="../../rand_core/block/struct.BlockRng.html" title="struct rand_core::block::BlockRng">BlockRng</a>&lt;R&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;R: <a class="trait" href="../../rand_core/block/trait.BlockRngCore.html" title="trait rand_core::block::BlockRngCore">BlockRngCore</a>&lt;Item = <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u32.html">u32</a>&gt;,<br>&nbsp;&nbsp;&nbsp;&nbsp;&lt;R as <a class="trait" href="../../rand_core/block/trait.BlockRngCore.html" title="trait rand_core::block::BlockRngCore">BlockRngCore</a>&gt;::<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>&lt;<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>&gt;,<br>&nbsp;&nbsp;&nbsp;&nbsp;&lt;R as <a class="trait" href="../../rand_core/block/trait.BlockRngCore.html" title="trait rand_core::block::BlockRngCore">BlockRngCore</a>&gt;::<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>&lt;<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>&gt;,&nbsp;</span></code><a href='#impl-RngCore' class='anchor'></a><a class='srclink' href='../../src/rand_core/block.rs.html#167-273' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.next_u32' class="method hidden"><code id='next_u32.v'>fn <a href='../../rand_core/trait.RngCore.html#tymethod.next_u32' class='fnname'>next_u32</a>(&amp;mut self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u32.html">u32</a></code><a class='srclink' href='../../src/rand_core/block.rs.html#171-179' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Return the next random <code>u32</code>. <a href="../../rand_core/trait.RngCore.html#tymethod.next_u32">Read more</a></p>
</div><h4 id='method.next_u64' class="method hidden"><code id='next_u64.v'>fn <a href='../../rand_core/trait.RngCore.html#tymethod.next_u64' class='fnname'>next_u64</a>(&amp;mut self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u64.html">u64</a></code><a class='srclink' href='../../src/rand_core/block.rs.html#182-210' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Return the next random <code>u64</code>. <a href="../../rand_core/trait.RngCore.html#tymethod.next_u64">Read more</a></p>
</div><h4 id='method.fill_bytes' class="method hidden"><code id='fill_bytes.v'>fn <a href='../../rand_core/trait.RngCore.html#tymethod.fill_bytes' class='fnname'>fill_bytes</a>(&amp;mut self, dest: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&amp;mut [</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>)</code><a class='srclink' href='../../src/rand_core/block.rs.html#216-251' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Fill <code>dest</code> with random data. <a href="../../rand_core/trait.RngCore.html#tymethod.fill_bytes">Read more</a></p>
</div><h4 id='method.try_fill_bytes' class="method hidden"><code id='try_fill_bytes.v'>fn <a href='../../rand_core/trait.RngCore.html#tymethod.try_fill_bytes' class='fnname'>try_fill_bytes</a>(&amp;mut self, dest: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&amp;mut [</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, <a class="struct" href="../../rand_core/struct.Error.html" title="struct rand_core::Error">Error</a>&gt;</code><a class='srclink' href='../../src/rand_core/block.rs.html#269-272' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Fill <code>dest</code> entirely with random data. <a href="../../rand_core/trait.RngCore.html#tymethod.try_fill_bytes">Read more</a></p>
</div></div><h3 id='impl-SeedableRng' class='impl'><code class='in-band'>impl&lt;R&gt; <a class="trait" href="../../rand_core/trait.SeedableRng.html" title="trait rand_core::SeedableRng">SeedableRng</a> for <a class="struct" href="../../rand_core/block/struct.BlockRng.html" title="struct rand_core::block::BlockRng">BlockRng</a>&lt;R&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;R: <a class="trait" href="../../rand_core/block/trait.BlockRngCore.html" title="trait rand_core::block::BlockRngCore">BlockRngCore</a> + <a class="trait" href="../../rand_core/trait.SeedableRng.html" title="trait rand_core::SeedableRng">SeedableRng</a>,&nbsp;</span></code><a href='#impl-SeedableRng' class='anchor'></a><a class='srclink' href='../../src/rand_core/block.rs.html#275-289' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='associatedtype.Seed' class="type"><code id='Seed.t'>type <a href='../../rand_core/trait.SeedableRng.html#associatedtype.Seed' class="type">Seed</a> = &lt;R as <a class="trait" href="../../rand_core/trait.SeedableRng.html" title="trait rand_core::SeedableRng">SeedableRng</a>&gt;::<a class="type" href="../../rand_core/trait.SeedableRng.html#associatedtype.Seed" title="type rand_core::SeedableRng::Seed">Seed</a></code></h4><div class='docblock'><p>Seed type, which is restricted to types mutably-dereferencable as <code>u8</code> arrays (we recommend <code>[u8; N]</code> for some <code>N</code>). <a href="../../rand_core/trait.SeedableRng.html#associatedtype.Seed">Read more</a></p>
</div><h4 id='method.from_seed' class="method hidden"><code id='from_seed.v'>fn <a href='../../rand_core/trait.SeedableRng.html#tymethod.from_seed' class='fnname'>from_seed</a>(seed: &lt;<a class="struct" href="../../rand_core/block/struct.BlockRng.html" title="struct rand_core::block::BlockRng">BlockRng</a>&lt;R&gt; as <a class="trait" href="../../rand_core/trait.SeedableRng.html" title="trait rand_core::SeedableRng">SeedableRng</a>&gt;::<a class="type" href="../../rand_core/trait.SeedableRng.html#associatedtype.Seed" title="type rand_core::SeedableRng::Seed">Seed</a>) -&gt; <a class="struct" href="../../rand_core/block/struct.BlockRng.html" title="struct rand_core::block::BlockRng">BlockRng</a>&lt;R&gt;</code><a class='srclink' href='../../src/rand_core/block.rs.html#278-280' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Create a new PRNG using the given seed. <a href="../../rand_core/trait.SeedableRng.html#tymethod.from_seed">Read more</a></p>
</div><h4 id='method.seed_from_u64' class="method hidden"><code id='seed_from_u64.v'>fn <a href='../../rand_core/trait.SeedableRng.html#method.seed_from_u64' class='fnname'>seed_from_u64</a>(seed: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u64.html">u64</a>) -&gt; <a class="struct" href="../../rand_core/block/struct.BlockRng.html" title="struct rand_core::block::BlockRng">BlockRng</a>&lt;R&gt;</code><a class='srclink' href='../../src/rand_core/block.rs.html#282-284' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Create a new PRNG using a <code>u64</code> seed. <a href="../../rand_core/trait.SeedableRng.html#method.seed_from_u64">Read more</a></p>
</div><h4 id='method.from_rng' class="method hidden"><code id='from_rng.v'>fn <a href='../../rand_core/trait.SeedableRng.html#method.from_rng' class='fnname'>from_rng</a>&lt;S&gt;(rng: S) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;<a class="struct" href="../../rand_core/block/struct.BlockRng.html" title="struct rand_core::block::BlockRng">BlockRng</a>&lt;R&gt;, <a class="struct" href="../../rand_core/struct.Error.html" title="struct rand_core::Error">Error</a>&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;S: <a class="trait" href="../../rand_core/trait.RngCore.html" title="trait rand_core::RngCore">RngCore</a>,&nbsp;</span></code><a class='srclink' href='../../src/rand_core/block.rs.html#286-288' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Create a new PRNG seeded from another <code>Rng</code>. <a href="../../rand_core/trait.SeedableRng.html#method.from_rng">Read more</a></p>
</div></div></div><h2 id='synthetic-implementations' class='small-section-header'>Auto Trait Implementations<a href='#synthetic-implementations' class='anchor'></a></h2><div id='synthetic-implementations-list'><h3 id='impl-Unpin' class='impl'><code class='in-band'>impl&lt;R:&nbsp;?<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a> for <a class="struct" href="../../rand_core/block/struct.BlockRng.html" title="struct rand_core::block::BlockRng">BlockRng</a>&lt;R&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;R: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a>,<br>&nbsp;&nbsp;&nbsp;&nbsp;&lt;R as <a class="trait" href="../../rand_core/block/trait.BlockRngCore.html" title="trait rand_core::block::BlockRngCore">BlockRngCore</a>&gt;::<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/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a>,&nbsp;</span></code><a href='#impl-Unpin' class='anchor'></a></h3><div class='impl-items'></div><h3 id='impl-Send' class='impl'><code class='in-band'>impl&lt;R:&nbsp;?<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> for <a class="struct" href="../../rand_core/block/struct.BlockRng.html" title="struct rand_core::block::BlockRng">BlockRng</a>&lt;R&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;R: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a>,<br>&nbsp;&nbsp;&nbsp;&nbsp;&lt;R as <a class="trait" href="../../rand_core/block/trait.BlockRngCore.html" title="trait rand_core::block::BlockRngCore">BlockRngCore</a>&gt;::<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/marker/trait.Send.html" title="trait core::marker::Send">Send</a>,&nbsp;</span></code><a href='#impl-Send' class='anchor'></a></h3><div class='impl-items'></div><h3 id='impl-Sync' class='impl'><code class='in-band'>impl&lt;R:&nbsp;?<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a> for <a class="struct" href="../../rand_core/block/struct.BlockRng.html" title="struct rand_core::block::BlockRng">BlockRng</a>&lt;R&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;R: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a>,<br>&nbsp;&nbsp;&nbsp;&nbsp;&lt;R as <a class="trait" href="../../rand_core/block/trait.BlockRngCore.html" title="trait rand_core::block::BlockRngCore">BlockRngCore</a>&gt;::<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/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a>,&nbsp;</span></code><a href='#impl-Sync' class='anchor'></a></h3><div class='impl-items'></div><h3 id='impl-UnwindSafe' class='impl'><code class='in-band'>impl&lt;R:&nbsp;?<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>&gt;
</div></div><h3 id='impl-TryFrom%3CU%3E' class='impl'><code class='in-band'>impl&lt;T, U&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a>&lt;U&gt; for T <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;U: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a>&lt;T&gt;,&nbsp;</span></code><a href='#impl-TryFrom%3CU%3E' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/convert.rs.html#572-578' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='associatedtype.Error' class="type"><code id='Error.t'>type <a href='https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#associatedtype.Error' class="type">Error</a> = <a class="enum" href="https://doc.rust-lang.org/nightly/core/convert/enum.Infallible.html" title="enum core::convert::Infallible">Infallible</a></code></h4><div class='docblock'><p>The type returned in the event of a conversion error.</p>
</div><h4 id='method.try_from' class="method hidden"><code id='try_from.v'>fn <a href='https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#tymethod.try_from' class='fnname'>try_from</a>(value: U) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;T, &lt;T as <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a>&lt;U&gt;&gt;::<a class="type" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a>&gt;</code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/convert.rs.html#575-577' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Performs the conversion.</p>
</div></div><h3 id='impl-Into%3CU%3E' class='impl'><code class='in-band'>impl&lt;T, U&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a>&lt;U&gt; for T <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;U: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.From.html" title="trait core::convert::From">From</a>&lt;T&gt;,&nbsp;</span></code><a href='#impl-Into%3CU%3E' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/convert.rs.html#544-549' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.into' class="method hidden"><code id='into.v'>fn <a href='https://doc.rust-lang.org/nightly/core/convert/trait.Into.html#tymethod.into' class='fnname'>into</a>(self) -&gt; U</code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/convert.rs.html#546-548' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Performs the conversion.</p>
</div></div><h3 id='impl-TryInto%3CU%3E' class='impl'><code class='in-band'>impl&lt;T, U&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryInto.html" title="trait core::convert::TryInto">TryInto</a>&lt;U&gt; for T <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;U: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a>&lt;T&gt;,&nbsp;</span></code><a href='#impl-TryInto%3CU%3E' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/convert.rs.html#560-567' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='associatedtype.Error-1' class="type"><code id='Error.t-1'>type <a href='https://doc.rust-lang.org/nightly/core/convert/trait.TryInto.html#associatedtype.Error' class="type">Error</a> = &lt;U as <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a>&lt;T&gt;&gt;::<a class="type" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a></code></h4><div class='docblock'><p>The type returned in the event of a conversion error.</p>
</div><h4 id='method.try_into' class="method hidden"><code id='try_into.v'>fn <a href='https://doc.rust-lang.org/nightly/core/convert/trait.TryInto.html#tymethod.try_into' class='fnname'>try_into</a>(self) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;U, &lt;U as <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a>&lt;T&gt;&gt;::<a class="type" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a>&gt;</code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/convert.rs.html#564-566' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Performs the conversion.</p>
</div></div><h3 id='impl-Borrow%3CT%3E' class='impl'><code class='in-band'>impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/core/borrow/trait.Borrow.html" title="trait core::borrow::Borrow">Borrow</a>&lt;T&gt; for T <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;T: ?<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,&nbsp;</span></code><a href='#impl-Borrow%3CT%3E' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/borrow.rs.html#213-215' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.borrow' class="method hidden"><code id='borrow.v'>fn <a href='https://doc.rust-lang.org/nightly/core/borrow/trait.Borrow.html#tymethod.borrow' class='fnname'>borrow</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;</a>T</code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/borrow.rs.html#214' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Immutably borrows from an owned value. <a href="https://doc.rust-lang.org/nightly/core/borrow/trait.Borrow.html#tymethod.borrow">Read more</a></p>
</div></div><h3 id='impl-BorrowMut%3CT%3E' class='impl'><code class='in-band'>impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/core/borrow/trait.BorrowMut.html" title="trait core::borrow::BorrowMut">BorrowMut</a>&lt;T&gt; for T <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;T: ?<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,&nbsp;</span></code><a href='#impl-BorrowMut%3CT%3E' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/borrow.rs.html#218-220' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.borrow_mut' class="method hidden"><code id='borrow_mut.v'>fn <a href='https://doc.rust-lang.org/nightly/core/borrow/trait.BorrowMut.html#tymethod.borrow_mut' class='fnname'>borrow_mut</a>(&amp;mut self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;mut </a>T</code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/borrow.rs.html#219' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Mutably borrows from an owned value. <a href="https://doc.rust-lang.org/nightly/core/borrow/trait.BorrowMut.html#tymethod.borrow_mut">Read more</a></p>
</div></div><h3 id='impl-Any' class='impl'><code class='in-band'>impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/core/any/trait.Any.html" title="trait core::any::Any">Any</a> for T <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;T: 'static + ?<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,&nbsp;</span></code><a href='#impl-Any' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/any.rs.html#100-102' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.type_id' class="method hidden"><code id='type_id.v'>fn <a href='https://doc.rust-lang.org/nightly/core/any/trait.Any.html#tymethod.type_id' class='fnname'>type_id</a>(&amp;self) -&gt; <a class="struct" href="https://doc.rust-lang.org/nightly/core/any/struct.TypeId.html" title="struct core::any::TypeId">TypeId</a></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/any.rs.html#101' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Gets the <code>TypeId</code> of <code>self</code>. <a href="https://doc.rust-lang.org/nightly/core/any/trait.Any.html#tymethod.type_id">Read more</a></p>
</div></div><h3 id='impl-ToOwned' class='impl'><code class='in-band'>impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/alloc/borrow/trait.ToOwned.html" title="trait alloc::borrow::ToOwned">ToOwned</a> for T <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;T: <a class="trait" href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a>,&nbsp;</span></code><a href='#impl-ToOwned' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/alloc/borrow.rs.html#81-92' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='associatedtype.Owned' class="type"><code id='Owned.t'>type <a href='https://doc.rust-lang.org/nightly/alloc/borrow/trait.ToOwned.html#associatedtype.Owned' class="type">Owned</a> = T</code></h4><div class='docblock'><p>The resulting type after obtaining ownership.</p>
</div><h4 id='method.to_owned' class="method hidden"><code id='to_owned.v'>fn <a href='https://doc.rust-lang.org/nightly/alloc/borrow/trait.ToOwned.html#tymethod.to_owned' class='fnname'>to_owned</a>(&amp;self) -&gt; T</code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/alloc/borrow.rs.html#85-87' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Creates owned data from borrowed data, usually by cloning. <a href="https://doc.rust-lang.org/nightly/alloc/borrow/trait.ToOwned.html#tymethod.to_owned">Read more</a></p>
</div><h4 id='method.clone_into' class="method hidden"><code id='clone_into.v'>fn <a href='https://doc.rust-lang.org/nightly/alloc/borrow/trait.ToOwned.html#method.clone_into' class='fnname'>clone_into</a>(&amp;self, target: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;mut </a>T)</code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/alloc/borrow.rs.html#89-91' title='goto source code'>[src]</a></h4><div class='stability hidden'><div class='stab unstable'><details><summary><span class='emoji'>🔬</span> This is a nightly-only experimental API. (<code>toowned_clone_into</code>)</summary><p>recently added</p>
</details></div></div><div class='docblock hidden'><p>Uses borrowed data to replace owned data, usually by cloning. <a href="https://doc.rust-lang.org/nightly/alloc/borrow/trait.ToOwned.html#method.clone_into">Read more</a></p>
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