mirror of
https://github.com/NotAShelf/mpvrc.git
synced 2026-04-17 00:13:48 +00:00
107 lines
No EOL
35 KiB
HTML
107 lines
No EOL
35 KiB
HTML
<!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="The core of a random number generator."><title>RngCore in rand_core - Rust</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-6b053e98.ttf.woff2,FiraSans-Regular-0fe48ade.woff2,FiraSans-Medium-e1aa3f0a.woff2,SourceCodePro-Regular-8badfe75.ttf.woff2,SourceCodePro-Semibold-aa29a496.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2" crossorigin href="../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../static.files/normalize-9960930a.css"><link rel="stylesheet" href="../static.files/rustdoc-42caa33d.css"><meta name="rustdoc-vars" data-root-path="../" data-static-root-path="../static.files/" data-current-crate="rand_core" data-themes="" data-resource-suffix="" data-rustdoc-version="1.84.1 (e71f9a9a9 2025-01-27)" data-channel="1.84.1" data-search-js="search-92e6798f.js" data-settings-js="settings-0f613d39.js" ><script src="../static.files/storage-59e33391.js"></script><script defer src="sidebar-items.js"></script><script defer src="../static.files/main-5f194d8c.js"></script><noscript><link rel="stylesheet" href="../static.files/noscript-893ab5e7.css"></noscript><link rel="icon" href="https://www.rust-lang.org/favicon.ico"></head><body class="rustdoc trait"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="mobile-topbar"><button class="sidebar-menu-toggle" title="show sidebar"></button><a class="logo-container" href="../rand_core/index.html"><img src="https://www.rust-lang.org/logos/rust-logo-128x128-blk.png" alt=""></a></nav><nav class="sidebar"><div class="sidebar-crate"><a class="logo-container" href="../rand_core/index.html"><img src="https://www.rust-lang.org/logos/rust-logo-128x128-blk.png" alt="logo"></a><h2><a href="../rand_core/index.html">rand_<wbr>core</a><span class="version">0.6.4</span></h2></div><div class="sidebar-elems"><section id="rustdoc-toc"><h2 class="location"><a href="#">RngCore</a></h2><h3><a href="#">Sections</a></h3><ul class="block top-toc"><li><a href="#example" title="Example">Example</a></li></ul><h3><a href="#required-methods">Required Methods</a></h3><ul class="block"><li><a href="#tymethod.fill_bytes" title="fill_bytes">fill_bytes</a></li><li><a href="#tymethod.next_u32" title="next_u32">next_u32</a></li><li><a href="#tymethod.next_u64" title="next_u64">next_u64</a></li><li><a href="#tymethod.try_fill_bytes" title="try_fill_bytes">try_fill_bytes</a></li></ul><h3><a href="#foreign-impls">Implementations on Foreign Types</a></h3><ul class="block"><li><a href="#impl-RngCore-for-%26mut+R" title="&'a mut R">&'a mut R</a></li><li><a href="#impl-RngCore-for-Box%3CR%3E" title="Box<R>">Box<R></a></li></ul><h3><a href="#trait-implementations">Trait Implementations</a></h3><ul class="block trait-implementation"><li><a href="#impl-Read-for-dyn+RngCore" title="Read">Read</a></li></ul><h3><a href="#implementors">Implementors</a></h3></section><div id="rustdoc-modnav"><h2 class="in-crate"><a href="index.html">In crate rand_<wbr>core</a></h2></div></div></nav><div class="sidebar-resizer"></div><main><div class="width-limiter"><rustdoc-search></rustdoc-search><section id="main-content" class="content"><div class="main-heading"><span class="rustdoc-breadcrumbs"><a href="index.html">rand_core</a></span><h1>Trait <span class="trait">RngCore</span><button id="copy-path" title="Copy item path to clipboard">Copy item path</button></h1><rustdoc-toolbar></rustdoc-toolbar><span class="sub-heading"><a class="src" href="../src/rand_core/lib.rs.html#142-185">Source</a> </span></div><pre class="rust item-decl"><code>pub trait RngCore {
|
|
// Required methods
|
|
fn <a href="#tymethod.next_u32" class="fn">next_u32</a>(&mut self) -> <a class="primitive" href="https://doc.rust-lang.org/1.84.1/std/primitive.u32.html">u32</a>;
|
|
<span class="item-spacer"></span> fn <a href="#tymethod.next_u64" class="fn">next_u64</a>(&mut self) -> <a class="primitive" href="https://doc.rust-lang.org/1.84.1/std/primitive.u64.html">u64</a>;
|
|
<span class="item-spacer"></span> fn <a href="#tymethod.fill_bytes" class="fn">fill_bytes</a>(&mut self, dest: &mut [<a class="primitive" href="https://doc.rust-lang.org/1.84.1/std/primitive.u8.html">u8</a>]);
|
|
<span class="item-spacer"></span> fn <a href="#tymethod.try_fill_bytes" class="fn">try_fill_bytes</a>(&mut self, dest: &mut [<a class="primitive" href="https://doc.rust-lang.org/1.84.1/std/primitive.u8.html">u8</a>]) -> <a class="enum" href="https://doc.rust-lang.org/1.84.1/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/1.84.1/std/primitive.unit.html">()</a>, <a class="struct" href="struct.Error.html" title="struct rand_core::Error">Error</a>>;
|
|
}</code></pre><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>The core of a random number generator.</p>
|
|
<p>This trait encapsulates the low-level functionality common to all
|
|
generators, and is the “back end”, to be implemented by generators.
|
|
End users should normally use the <code>Rng</code> trait from the <a href="https://docs.rs/rand"><code>rand</code></a> crate,
|
|
which is automatically implemented for every type implementing <code>RngCore</code>.</p>
|
|
<p>Three different methods for generating random data are provided since the
|
|
optimal implementation of each is dependent on the type of generator. There
|
|
is no required relationship between the output of each; e.g. many
|
|
implementations of <a href="trait.RngCore.html#tymethod.fill_bytes" title="method rand_core::RngCore::fill_bytes"><code>fill_bytes</code></a> consume a whole number of <code>u32</code> or <code>u64</code>
|
|
values and drop any remaining unused bytes. The same can happen with the
|
|
<a href="trait.RngCore.html#tymethod.next_u32" title="method rand_core::RngCore::next_u32"><code>next_u32</code></a> and <a href="trait.RngCore.html#tymethod.next_u64" title="method rand_core::RngCore::next_u64"><code>next_u64</code></a> methods, implementations may discard some
|
|
random bits for efficiency.</p>
|
|
<p>The <a href="trait.RngCore.html#tymethod.try_fill_bytes" title="method rand_core::RngCore::try_fill_bytes"><code>try_fill_bytes</code></a> method is a variant of <a href="trait.RngCore.html#tymethod.fill_bytes" title="method rand_core::RngCore::fill_bytes"><code>fill_bytes</code></a> allowing error
|
|
handling; it is not deemed sufficiently useful to add equivalents for
|
|
<a href="trait.RngCore.html#tymethod.next_u32" title="method rand_core::RngCore::next_u32"><code>next_u32</code></a> or <a href="trait.RngCore.html#tymethod.next_u64" title="method rand_core::RngCore::next_u64"><code>next_u64</code></a> since the latter methods are almost always used
|
|
with algorithmic generators (PRNGs), which are normally infallible.</p>
|
|
<p>Implementers should produce bits uniformly. Pathological RNGs (e.g. always
|
|
returning the same value, or never setting certain bits) can break rejection
|
|
sampling used by random distributions, and also break other RNGs when
|
|
seeding them via <a href="trait.SeedableRng.html#method.from_rng" title="associated function rand_core::SeedableRng::from_rng"><code>SeedableRng::from_rng</code></a>.</p>
|
|
<p>Algorithmic generators implementing <a href="trait.SeedableRng.html" title="trait rand_core::SeedableRng"><code>SeedableRng</code></a> should normally have
|
|
<em>portable, reproducible</em> output, i.e. fix Endianness when converting values
|
|
to avoid platform differences, and avoid making any changes which affect
|
|
output (except by communicating that the release has breaking changes).</p>
|
|
<p>Typically an RNG will implement only one of the methods available
|
|
in this trait directly, then use the helper functions from the
|
|
<a href="impls/index.html" title="mod rand_core::impls"><code>impls</code></a> module to implement the other methods.</p>
|
|
<p>It is recommended that implementations also implement:</p>
|
|
<ul>
|
|
<li><code>Debug</code> with a custom implementation which <em>does not</em> print any internal
|
|
state (at least, <a href="trait.CryptoRng.html" title="trait rand_core::CryptoRng"><code>CryptoRng</code></a>s should not risk leaking state through
|
|
<code>Debug</code>).</li>
|
|
<li><code>Serialize</code> and <code>Deserialize</code> (from Serde), preferably making Serde
|
|
support optional at the crate level in PRNG libs.</li>
|
|
<li><code>Clone</code>, if possible.</li>
|
|
<li><em>never</em> implement <code>Copy</code> (accidental copies may cause repeated values).</li>
|
|
<li><em>do not</em> implement <code>Default</code> for pseudorandom generators, but instead
|
|
implement <a href="trait.SeedableRng.html" title="trait rand_core::SeedableRng"><code>SeedableRng</code></a>, to guide users towards proper seeding.
|
|
External / hardware RNGs can choose to implement <code>Default</code>.</li>
|
|
<li><code>Eq</code> and <code>PartialEq</code> could be implemented, but are probably not useful.</li>
|
|
</ul>
|
|
<h2 id="example"><a class="doc-anchor" href="#example">§</a>Example</h2>
|
|
<p>A simple example, obviously not generating very <em>random</em> output:</p>
|
|
|
|
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="attr">#![allow(dead_code)]
|
|
</span><span class="kw">use </span>rand_core::{RngCore, Error, impls};
|
|
|
|
<span class="kw">struct </span>CountingRng(u64);
|
|
|
|
<span class="kw">impl </span>RngCore <span class="kw">for </span>CountingRng {
|
|
<span class="kw">fn </span>next_u32(<span class="kw-2">&mut </span><span class="self">self</span>) -> u32 {
|
|
<span class="self">self</span>.next_u64() <span class="kw">as </span>u32
|
|
}
|
|
|
|
<span class="kw">fn </span>next_u64(<span class="kw-2">&mut </span><span class="self">self</span>) -> u64 {
|
|
<span class="self">self</span>.<span class="number">0 </span>+= <span class="number">1</span>;
|
|
<span class="self">self</span>.<span class="number">0
|
|
</span>}
|
|
|
|
<span class="kw">fn </span>fill_bytes(<span class="kw-2">&mut </span><span class="self">self</span>, dest: <span class="kw-2">&mut </span>[u8]) {
|
|
impls::fill_bytes_via_next(<span class="self">self</span>, dest)
|
|
}
|
|
|
|
<span class="kw">fn </span>try_fill_bytes(<span class="kw-2">&mut </span><span class="self">self</span>, dest: <span class="kw-2">&mut </span>[u8]) -> <span class="prelude-ty">Result</span><(), Error> {
|
|
<span class="prelude-val">Ok</span>(<span class="self">self</span>.fill_bytes(dest))
|
|
}
|
|
}</code></pre></div>
|
|
</div></details><h2 id="required-methods" class="section-header">Required Methods<a href="#required-methods" class="anchor">§</a></h2><div class="methods"><details class="toggle method-toggle" open><summary><section id="tymethod.next_u32" class="method"><a class="src rightside" href="../src/rand_core/lib.rs.html#148">Source</a><h4 class="code-header">fn <a href="#tymethod.next_u32" class="fn">next_u32</a>(&mut self) -> <a class="primitive" href="https://doc.rust-lang.org/1.84.1/std/primitive.u32.html">u32</a></h4></section></summary><div class="docblock"><p>Return the next random <code>u32</code>.</p>
|
|
<p>RNGs must implement at least one method from this trait directly. In
|
|
the case this method is not implemented directly, it can be implemented
|
|
using <code>self.next_u64() as u32</code> or via <a href="impls/fn.next_u32_via_fill.html" title="fn rand_core::impls::next_u32_via_fill"><code>impls::next_u32_via_fill</code></a>.</p>
|
|
</div></details><details class="toggle method-toggle" open><summary><section id="tymethod.next_u64" class="method"><a class="src rightside" href="../src/rand_core/lib.rs.html#155">Source</a><h4 class="code-header">fn <a href="#tymethod.next_u64" class="fn">next_u64</a>(&mut self) -> <a class="primitive" href="https://doc.rust-lang.org/1.84.1/std/primitive.u64.html">u64</a></h4></section></summary><div class="docblock"><p>Return the next random <code>u64</code>.</p>
|
|
<p>RNGs must implement at least one method from this trait directly. In
|
|
the case this method is not implemented directly, it can be implemented
|
|
via <a href="impls/fn.next_u64_via_u32.html" title="fn rand_core::impls::next_u64_via_u32"><code>impls::next_u64_via_u32</code></a> or via <a href="impls/fn.next_u64_via_fill.html" title="fn rand_core::impls::next_u64_via_fill"><code>impls::next_u64_via_fill</code></a>.</p>
|
|
</div></details><details class="toggle method-toggle" open><summary><section id="tymethod.fill_bytes" class="method"><a class="src rightside" href="../src/rand_core/lib.rs.html#171">Source</a><h4 class="code-header">fn <a href="#tymethod.fill_bytes" class="fn">fill_bytes</a>(&mut self, dest: &mut [<a class="primitive" href="https://doc.rust-lang.org/1.84.1/std/primitive.u8.html">u8</a>])</h4></section></summary><div class="docblock"><p>Fill <code>dest</code> with random data.</p>
|
|
<p>RNGs must implement at least one method from this trait directly. In
|
|
the case this method is not implemented directly, it can be implemented
|
|
via <a href="impls/fn.fill_bytes_via_next.html" title="fn rand_core::impls::fill_bytes_via_next"><code>impls::fill_bytes_via_next</code></a> or
|
|
via <a href="trait.RngCore.html#tymethod.try_fill_bytes" title="method rand_core::RngCore::try_fill_bytes"><code>RngCore::try_fill_bytes</code></a>; if this generator can
|
|
fail the implementation must choose how best to handle errors here
|
|
(e.g. panic with a descriptive message or log a warning and retry a few
|
|
times).</p>
|
|
<p>This method should guarantee that <code>dest</code> is entirely filled
|
|
with new data, and may panic if this is impossible
|
|
(e.g. reading past the end of a file that is being used as the
|
|
source of randomness).</p>
|
|
</div></details><details class="toggle method-toggle" open><summary><section id="tymethod.try_fill_bytes" class="method"><a class="src rightside" href="../src/rand_core/lib.rs.html#184">Source</a><h4 class="code-header">fn <a href="#tymethod.try_fill_bytes" class="fn">try_fill_bytes</a>(&mut self, dest: &mut [<a class="primitive" href="https://doc.rust-lang.org/1.84.1/std/primitive.u8.html">u8</a>]) -> <a class="enum" href="https://doc.rust-lang.org/1.84.1/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/1.84.1/std/primitive.unit.html">()</a>, <a class="struct" href="struct.Error.html" title="struct rand_core::Error">Error</a>></h4></section></summary><div class="docblock"><p>Fill <code>dest</code> entirely with random data.</p>
|
|
<p>This is the only method which allows an RNG to report errors while
|
|
generating random data thus making this the primary method implemented
|
|
by external (true) RNGs (e.g. <code>OsRng</code>) which can fail. It may be used
|
|
directly to generate keys and to seed (infallible) PRNGs.</p>
|
|
<p>Other than error handling, this method is identical to <a href="trait.RngCore.html#tymethod.fill_bytes" title="method rand_core::RngCore::fill_bytes"><code>RngCore::fill_bytes</code></a>;
|
|
thus this may be implemented using <code>Ok(self.fill_bytes(dest))</code> or
|
|
<code>fill_bytes</code> may be implemented with
|
|
<code>self.try_fill_bytes(dest).unwrap()</code> or more specific error handling.</p>
|
|
</div></details></div><h2 id="trait-implementations" class="section-header">Trait Implementations<a href="#trait-implementations" class="anchor">§</a></h2><div id="trait-implementations-list"><details class="toggle implementors-toggle" open><summary><section id="impl-Read-for-dyn+RngCore" class="impl"><a class="src rightside" href="../src/rand_core/lib.rs.html#473-478">Source</a><a href="#impl-Read-for-dyn+RngCore" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.84.1/std/io/trait.Read.html" title="trait std::io::Read">Read</a> for dyn <a class="trait" href="trait.RngCore.html" title="trait rand_core::RngCore">RngCore</a></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.read" class="method trait-impl"><a class="src rightside" href="../src/rand_core/lib.rs.html#474-477">Source</a><a href="#method.read" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.84.1/std/io/trait.Read.html#tymethod.read" class="fn">read</a>(&mut self, buf: &mut [<a class="primitive" href="https://doc.rust-lang.org/1.84.1/std/primitive.u8.html">u8</a>]) -> <a class="enum" href="https://doc.rust-lang.org/1.84.1/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/1.84.1/std/primitive.usize.html">usize</a>, <a class="struct" href="https://doc.rust-lang.org/1.84.1/std/io/error/struct.Error.html" title="struct std::io::error::Error">Error</a>></h4></section></summary><div class='docblock'>Pull some bytes from this source into the specified buffer, returning
|
|
how many bytes were read. <a href="https://doc.rust-lang.org/1.84.1/std/io/trait.Read.html#tymethod.read">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.read_vectored" class="method trait-impl"><span class="rightside"><span class="since" title="Stable since Rust version 1.36.0">1.36.0</span> · <a class="src" href="https://doc.rust-lang.org/1.84.1/src/std/io/mod.rs.html#778">Source</a></span><a href="#method.read_vectored" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.84.1/std/io/trait.Read.html#method.read_vectored" class="fn">read_vectored</a>(&mut self, bufs: &mut [<a class="struct" href="https://doc.rust-lang.org/1.84.1/std/io/struct.IoSliceMut.html" title="struct std::io::IoSliceMut">IoSliceMut</a><'_>]) -> <a class="enum" href="https://doc.rust-lang.org/1.84.1/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/1.84.1/std/primitive.usize.html">usize</a>, <a class="struct" href="https://doc.rust-lang.org/1.84.1/std/io/error/struct.Error.html" title="struct std::io::error::Error">Error</a>></h4></section></summary><div class='docblock'>Like <code>read</code>, except that it reads into a slice of buffers. <a href="https://doc.rust-lang.org/1.84.1/std/io/trait.Read.html#method.read_vectored">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.is_read_vectored" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.84.1/src/std/io/mod.rs.html#791">Source</a><a href="#method.is_read_vectored" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.84.1/std/io/trait.Read.html#method.is_read_vectored" class="fn">is_read_vectored</a>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/1.84.1/std/primitive.bool.html">bool</a></h4></section></summary><span class="item-info"><div class="stab unstable"><span class="emoji">🔬</span><span>This is a nightly-only experimental API. (<code>can_vector</code>)</span></div></span><div class='docblock'>Determines if this <code>Read</code>er has an efficient <code>read_vectored</code>
|
|
implementation. <a href="https://doc.rust-lang.org/1.84.1/std/io/trait.Read.html#method.is_read_vectored">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.read_to_end" class="method trait-impl"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="src" href="https://doc.rust-lang.org/1.84.1/src/std/io/mod.rs.html#875">Source</a></span><a href="#method.read_to_end" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.84.1/std/io/trait.Read.html#method.read_to_end" class="fn">read_to_end</a>(&mut self, buf: &mut <a class="struct" href="https://doc.rust-lang.org/1.84.1/alloc/vec/struct.Vec.html" title="struct alloc::vec::Vec">Vec</a><<a class="primitive" href="https://doc.rust-lang.org/1.84.1/std/primitive.u8.html">u8</a>>) -> <a class="enum" href="https://doc.rust-lang.org/1.84.1/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/1.84.1/std/primitive.usize.html">usize</a>, <a class="struct" href="https://doc.rust-lang.org/1.84.1/std/io/error/struct.Error.html" title="struct std::io::error::Error">Error</a>></h4></section></summary><div class='docblock'>Reads all bytes until EOF in this source, placing them into <code>buf</code>. <a href="https://doc.rust-lang.org/1.84.1/std/io/trait.Read.html#method.read_to_end">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.read_to_string" class="method trait-impl"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="src" href="https://doc.rust-lang.org/1.84.1/src/std/io/mod.rs.html#918">Source</a></span><a href="#method.read_to_string" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.84.1/std/io/trait.Read.html#method.read_to_string" class="fn">read_to_string</a>(&mut self, buf: &mut <a class="struct" href="https://doc.rust-lang.org/1.84.1/alloc/string/struct.String.html" title="struct alloc::string::String">String</a>) -> <a class="enum" href="https://doc.rust-lang.org/1.84.1/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/1.84.1/std/primitive.usize.html">usize</a>, <a class="struct" href="https://doc.rust-lang.org/1.84.1/std/io/error/struct.Error.html" title="struct std::io::error::Error">Error</a>></h4></section></summary><div class='docblock'>Reads all bytes until EOF in this source, appending them to <code>buf</code>. <a href="https://doc.rust-lang.org/1.84.1/std/io/trait.Read.html#method.read_to_string">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.read_exact" class="method trait-impl"><span class="rightside"><span class="since" title="Stable since Rust version 1.6.0">1.6.0</span> · <a class="src" href="https://doc.rust-lang.org/1.84.1/src/std/io/mod.rs.html#971">Source</a></span><a href="#method.read_exact" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.84.1/std/io/trait.Read.html#method.read_exact" class="fn">read_exact</a>(&mut self, buf: &mut [<a class="primitive" href="https://doc.rust-lang.org/1.84.1/std/primitive.u8.html">u8</a>]) -> <a class="enum" href="https://doc.rust-lang.org/1.84.1/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/1.84.1/std/primitive.unit.html">()</a>, <a class="struct" href="https://doc.rust-lang.org/1.84.1/std/io/error/struct.Error.html" title="struct std::io::error::Error">Error</a>></h4></section></summary><div class='docblock'>Reads the exact number of bytes required to fill <code>buf</code>. <a href="https://doc.rust-lang.org/1.84.1/std/io/trait.Read.html#method.read_exact">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.read_buf" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.84.1/src/std/io/mod.rs.html#984">Source</a><a href="#method.read_buf" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.84.1/std/io/trait.Read.html#method.read_buf" class="fn">read_buf</a>(&mut self, buf: <a class="struct" href="https://doc.rust-lang.org/1.84.1/core/io/borrowed_buf/struct.BorrowedCursor.html" title="struct core::io::borrowed_buf::BorrowedCursor">BorrowedCursor</a><'_>) -> <a class="enum" href="https://doc.rust-lang.org/1.84.1/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/1.84.1/std/primitive.unit.html">()</a>, <a class="struct" href="https://doc.rust-lang.org/1.84.1/std/io/error/struct.Error.html" title="struct std::io::error::Error">Error</a>></h4></section></summary><span class="item-info"><div class="stab unstable"><span class="emoji">🔬</span><span>This is a nightly-only experimental API. (<code>read_buf</code>)</span></div></span><div class='docblock'>Pull some bytes from this source into the specified buffer. <a href="https://doc.rust-lang.org/1.84.1/std/io/trait.Read.html#method.read_buf">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.read_buf_exact" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.84.1/src/std/io/mod.rs.html#1007">Source</a><a href="#method.read_buf_exact" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.84.1/std/io/trait.Read.html#method.read_buf_exact" class="fn">read_buf_exact</a>(&mut self, cursor: <a class="struct" href="https://doc.rust-lang.org/1.84.1/core/io/borrowed_buf/struct.BorrowedCursor.html" title="struct core::io::borrowed_buf::BorrowedCursor">BorrowedCursor</a><'_>) -> <a class="enum" href="https://doc.rust-lang.org/1.84.1/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/1.84.1/std/primitive.unit.html">()</a>, <a class="struct" href="https://doc.rust-lang.org/1.84.1/std/io/error/struct.Error.html" title="struct std::io::error::Error">Error</a>></h4></section></summary><span class="item-info"><div class="stab unstable"><span class="emoji">🔬</span><span>This is a nightly-only experimental API. (<code>read_buf</code>)</span></div></span><div class='docblock'>Reads the exact number of bytes required to fill <code>cursor</code>. <a href="https://doc.rust-lang.org/1.84.1/std/io/trait.Read.html#method.read_buf_exact">Read more</a></div></details></div></details></div><h2 id="foreign-impls" class="section-header">Implementations on Foreign Types<a href="#foreign-impls" class="anchor">§</a></h2><details class="toggle implementors-toggle"><summary><section id="impl-RngCore-for-%26mut+R" class="impl"><a class="src rightside" href="../src/rand_core/lib.rs.html#424-444">Source</a><a href="#impl-RngCore-for-%26mut+R" class="anchor">§</a><h3 class="code-header">impl<'a, R: <a class="trait" href="trait.RngCore.html" title="trait rand_core::RngCore">RngCore</a> + ?<a class="trait" href="https://doc.rust-lang.org/1.84.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>> <a class="trait" href="trait.RngCore.html" title="trait rand_core::RngCore">RngCore</a> for <a class="primitive" href="https://doc.rust-lang.org/1.84.1/std/primitive.reference.html">&'a mut R</a></h3></section></summary><div class="impl-items"><section id="method.next_u32" class="method trait-impl"><a class="src rightside" href="../src/rand_core/lib.rs.html#426-428">Source</a><a href="#method.next_u32" class="anchor">§</a><h4 class="code-header">fn <a href="#tymethod.next_u32" class="fn">next_u32</a>(&mut self) -> <a class="primitive" href="https://doc.rust-lang.org/1.84.1/std/primitive.u32.html">u32</a></h4></section><section id="method.next_u64" class="method trait-impl"><a class="src rightside" href="../src/rand_core/lib.rs.html#431-433">Source</a><a href="#method.next_u64" class="anchor">§</a><h4 class="code-header">fn <a href="#tymethod.next_u64" class="fn">next_u64</a>(&mut self) -> <a class="primitive" href="https://doc.rust-lang.org/1.84.1/std/primitive.u64.html">u64</a></h4></section><section id="method.fill_bytes" class="method trait-impl"><a class="src rightside" href="../src/rand_core/lib.rs.html#436-438">Source</a><a href="#method.fill_bytes" class="anchor">§</a><h4 class="code-header">fn <a href="#tymethod.fill_bytes" class="fn">fill_bytes</a>(&mut self, dest: &mut [<a class="primitive" href="https://doc.rust-lang.org/1.84.1/std/primitive.u8.html">u8</a>])</h4></section><section id="method.try_fill_bytes" class="method trait-impl"><a class="src rightside" href="../src/rand_core/lib.rs.html#441-443">Source</a><a href="#method.try_fill_bytes" class="anchor">§</a><h4 class="code-header">fn <a href="#tymethod.try_fill_bytes" class="fn">try_fill_bytes</a>(&mut self, dest: &mut [<a class="primitive" href="https://doc.rust-lang.org/1.84.1/std/primitive.u8.html">u8</a>]) -> <a class="enum" href="https://doc.rust-lang.org/1.84.1/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/1.84.1/std/primitive.unit.html">()</a>, <a class="struct" href="struct.Error.html" title="struct rand_core::Error">Error</a>></h4></section></div></details><details class="toggle implementors-toggle"><summary><section id="impl-RngCore-for-Box%3CR%3E" class="impl"><a class="src rightside" href="../src/rand_core/lib.rs.html#450-470">Source</a><a href="#impl-RngCore-for-Box%3CR%3E" class="anchor">§</a><h3 class="code-header">impl<R: <a class="trait" href="trait.RngCore.html" title="trait rand_core::RngCore">RngCore</a> + ?<a class="trait" href="https://doc.rust-lang.org/1.84.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>> <a class="trait" href="trait.RngCore.html" title="trait rand_core::RngCore">RngCore</a> for <a class="struct" href="https://doc.rust-lang.org/1.84.1/alloc/boxed/struct.Box.html" title="struct alloc::boxed::Box">Box</a><R></h3></section></summary><div class="impl-items"><section id="method.next_u32-1" class="method trait-impl"><a class="src rightside" href="../src/rand_core/lib.rs.html#452-454">Source</a><a href="#method.next_u32-1" class="anchor">§</a><h4 class="code-header">fn <a href="#tymethod.next_u32" class="fn">next_u32</a>(&mut self) -> <a class="primitive" href="https://doc.rust-lang.org/1.84.1/std/primitive.u32.html">u32</a></h4></section><section id="method.next_u64-1" class="method trait-impl"><a class="src rightside" href="../src/rand_core/lib.rs.html#457-459">Source</a><a href="#method.next_u64-1" class="anchor">§</a><h4 class="code-header">fn <a href="#tymethod.next_u64" class="fn">next_u64</a>(&mut self) -> <a class="primitive" href="https://doc.rust-lang.org/1.84.1/std/primitive.u64.html">u64</a></h4></section><section id="method.fill_bytes-1" class="method trait-impl"><a class="src rightside" href="../src/rand_core/lib.rs.html#462-464">Source</a><a href="#method.fill_bytes-1" class="anchor">§</a><h4 class="code-header">fn <a href="#tymethod.fill_bytes" class="fn">fill_bytes</a>(&mut self, dest: &mut [<a class="primitive" href="https://doc.rust-lang.org/1.84.1/std/primitive.u8.html">u8</a>])</h4></section><section id="method.try_fill_bytes-1" class="method trait-impl"><a class="src rightside" href="../src/rand_core/lib.rs.html#467-469">Source</a><a href="#method.try_fill_bytes-1" class="anchor">§</a><h4 class="code-header">fn <a href="#tymethod.try_fill_bytes" class="fn">try_fill_bytes</a>(&mut self, dest: &mut [<a class="primitive" href="https://doc.rust-lang.org/1.84.1/std/primitive.u8.html">u8</a>]) -> <a class="enum" href="https://doc.rust-lang.org/1.84.1/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/1.84.1/std/primitive.unit.html">()</a>, <a class="struct" href="struct.Error.html" title="struct rand_core::Error">Error</a>></h4></section></div></details><h2 id="implementors" class="section-header">Implementors<a href="#implementors" class="anchor">§</a></h2><div id="implementors-list"><section id="impl-RngCore-for-OsRng" class="impl"><a class="src rightside" href="../src/rand_core/os.rs.html#52-71">Source</a><a href="#impl-RngCore-for-OsRng" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="trait.RngCore.html" title="trait rand_core::RngCore">RngCore</a> for <a class="struct" href="struct.OsRng.html" title="struct rand_core::OsRng">OsRng</a></h3></section><section id="impl-RngCore-for-BlockRng%3CR%3E" class="impl"><a class="src rightside" href="../src/rand_core/block.rs.html#181-241">Source</a><a href="#impl-RngCore-for-BlockRng%3CR%3E" class="anchor">§</a><h3 class="code-header">impl<R: <a class="trait" href="block/trait.BlockRngCore.html" title="trait rand_core::block::BlockRngCore">BlockRngCore</a><Item = <a class="primitive" href="https://doc.rust-lang.org/1.84.1/std/primitive.u32.html">u32</a>>> <a class="trait" href="trait.RngCore.html" title="trait rand_core::RngCore">RngCore</a> for <a class="struct" href="block/struct.BlockRng.html" title="struct rand_core::block::BlockRng">BlockRng</a><R><div class="where">where
|
|
<R as <a class="trait" href="block/trait.BlockRngCore.html" title="trait rand_core::block::BlockRngCore">BlockRngCore</a>>::<a class="associatedtype" href="block/trait.BlockRngCore.html#associatedtype.Results" title="type rand_core::block::BlockRngCore::Results">Results</a>: <a class="trait" href="https://doc.rust-lang.org/1.84.1/core/convert/trait.AsRef.html" title="trait core::convert::AsRef">AsRef</a><[<a class="primitive" href="https://doc.rust-lang.org/1.84.1/std/primitive.u32.html">u32</a>]> + <a class="trait" href="https://doc.rust-lang.org/1.84.1/core/convert/trait.AsMut.html" title="trait core::convert::AsMut">AsMut</a><[<a class="primitive" href="https://doc.rust-lang.org/1.84.1/std/primitive.u32.html">u32</a>]>,</div></h3></section><section id="impl-RngCore-for-BlockRng64%3CR%3E" class="impl"><a class="src rightside" href="../src/rand_core/block.rs.html#349-410">Source</a><a href="#impl-RngCore-for-BlockRng64%3CR%3E" class="anchor">§</a><h3 class="code-header">impl<R: <a class="trait" href="block/trait.BlockRngCore.html" title="trait rand_core::block::BlockRngCore">BlockRngCore</a><Item = <a class="primitive" href="https://doc.rust-lang.org/1.84.1/std/primitive.u64.html">u64</a>>> <a class="trait" href="trait.RngCore.html" title="trait rand_core::RngCore">RngCore</a> for <a class="struct" href="block/struct.BlockRng64.html" title="struct rand_core::block::BlockRng64">BlockRng64</a><R><div class="where">where
|
|
<R as <a class="trait" href="block/trait.BlockRngCore.html" title="trait rand_core::block::BlockRngCore">BlockRngCore</a>>::<a class="associatedtype" href="block/trait.BlockRngCore.html#associatedtype.Results" title="type rand_core::block::BlockRngCore::Results">Results</a>: <a class="trait" href="https://doc.rust-lang.org/1.84.1/core/convert/trait.AsRef.html" title="trait core::convert::AsRef">AsRef</a><[<a class="primitive" href="https://doc.rust-lang.org/1.84.1/std/primitive.u64.html">u64</a>]> + <a class="trait" href="https://doc.rust-lang.org/1.84.1/core/convert/trait.AsMut.html" title="trait core::convert::AsMut">AsMut</a><[<a class="primitive" href="https://doc.rust-lang.org/1.84.1/std/primitive.u64.html">u64</a>]>,</div></h3></section></div><script src="../trait.impl/rand_core/trait.RngCore.js" data-ignore-extern-crates="alloc" async></script></section></div></main></body></html> |