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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 `MmapMut` struct in crate `memmap`."><meta name="keywords" content="rust, rustlang, rust-lang, MmapMut"><title>memmap::MmapMut - 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></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><p class='location'>Struct MmapMut</p><div class="sidebar-elems"><div class="block items"><a class="sidebar-title" href="#methods">Methods</a><div class="sidebar-links"><a href="#method.map_mut">map_mut</a><a href="#method.map_anon">map_anon</a><a href="#method.flush">flush</a><a href="#method.flush_async">flush_async</a><a href="#method.flush_range">flush_range</a><a href="#method.flush_async_range">flush_async_range</a><a href="#method.make_read_only">make_read_only</a><a href="#method.make_exec">make_exec</a></div><a class="sidebar-title" href="#deref-methods">Methods from Deref&lt;Target=[u8]&gt;</a><div class="sidebar-links"><a href="#method.len">len</a><a href="#method.is_empty">is_empty</a><a href="#method.first">first</a><a href="#method.split_first">split_first</a><a href="#method.split_last">split_last</a><a href="#method.last">last</a><a href="#method.get">get</a><a href="#method.get_unchecked">get_unchecked</a><a href="#method.as_ptr">as_ptr</a><a href="#method.iter">iter</a><a href="#method.windows">windows</a><a href="#method.chunks">chunks</a><a href="#method.exact_chunks">exact_chunks</a><a href="#method.split_at">split_at</a><a href="#method.split">split</a><a href="#method.rsplit">rsplit</a><a href="#method.splitn">splitn</a><a href="#method.rsplitn">rsplitn</a><a href="#method.contains">contains</a><a href="#method.starts_with">starts_with</a><a href="#method.ends_with">ends_with</a><a href="#method.binary_search">binary_search</a><a href="#method.binary_search_by">binary_search_by</a><a href="#method.binary_search_by_key">binary_search_by_key</a></div><a class="sidebar-title" href="#implementations">Trait Implementations</a><div class="sidebar-links"><a href="#impl-Deref">Deref</a><a href="#impl-DerefMut">DerefMut</a><a href="#impl-AsRef%3C%5Bu8%5D%3E">AsRef&lt;[u8]&gt;</a><a href="#impl-AsMut%3C%5Bu8%5D%3E">AsMut&lt;[u8]&gt;</a><a href="#impl-Debug">Debug</a></div><a class="sidebar-title" href="#synthetic-implementations">Auto Trait Implementations</a><div class="sidebar-links"><a href="#impl-Send">Send</a><a href="#impl-Sync">Sync</a></div></div><p class='location'><a href='index.html'>memmap</a></p><script>window.sidebarCurrent = {name: 'MmapMut', 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"><input class="search-input" name="search" autocomplete="off" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><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='in-band'>Struct <a href='index.html'>memmap</a>::<wbr><a class="struct" href=''>MmapMut</a></span><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/memmap/lib.rs.html#424-426' title='goto source code'>[src]</a></span></h1><div class="docblock type-decl"><pre class='rust struct'>pub struct MmapMut { /* fields omitted */ }</pre></div><div class='docblock'><p>A mutable memory mapped buffer.</p>
<p>A file-backed <code>MmapMut</code> buffer may be used to read from or write to a file. An anonymous
<code>MmapMut</code> buffer may be used any place that an in-memory byte buffer is needed. Use
<code>MmapOptions</code> for creating memory maps.</p>
<p>See <code>Mmap</code> for the immutable version.</p>
</div>
<h2 id='methods' class='small-section-header'>
Methods<a href='#methods' class='anchor'></a>
</h2>
<h3 id='impl' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl <a class="struct" href="../memmap/struct.MmapMut.html" title="struct memmap::MmapMut">MmapMut</a></code><a href='#impl' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/memmap/lib.rs.html#428-602' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'><h4 id='method.map_mut' class="method"><span id='map_mut.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub unsafe fn <a href='#method.map_mut' class='fnname'>map_mut</a>(file: &amp;<a class="struct" href="https://doc.rust-lang.org/nightly/std/fs/struct.File.html" title="struct std::fs::File">File</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/nightly/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="struct" href="../memmap/struct.MmapMut.html" title="struct memmap::MmapMut">MmapMut</a>&gt;</code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/memmap/lib.rs.html#467-469' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Creates a writeable memory map backed by a file.</p>
<p>This is equivalent to calling <code>MmapOptions::new().map_mut(file)</code>.</p>
<h1 id="errors" class="section-header"><a href="#errors">Errors</a></h1>
<p>This method returns an error when the underlying system call fails, which can happen for a
variety of reasons, such as when the file is not open with read and write permissions.</p>
<h1 id="example" class="section-header"><a href="#example">Example</a></h1>
<pre class="rust rust-example-rendered">
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">fs</span>::<span class="ident">OpenOptions</span>;
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">path</span>::<span class="ident">PathBuf</span>;
<span class="kw">use</span> <span class="ident">memmap</span>::<span class="ident">MmapMut</span>;
<span class="kw">let</span> <span class="ident">path</span>: <span class="ident">PathBuf</span> <span class="op">=</span> <span class="comment">/* path to file */</span>
<span class="kw">let</span> <span class="ident">file</span> <span class="op">=</span> <span class="ident">OpenOptions</span>::<span class="ident">new</span>()
.<span class="ident">read</span>(<span class="bool-val">true</span>)
.<span class="ident">write</span>(<span class="bool-val">true</span>)
.<span class="ident">create</span>(<span class="bool-val">true</span>)
.<span class="ident">open</span>(<span class="kw-2">&amp;</span><span class="ident">path</span>)<span class="question-mark">?</span>;
<span class="ident">file</span>.<span class="ident">set_len</span>(<span class="number">13</span>)<span class="question-mark">?</span>;
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">mmap</span> <span class="op">=</span> <span class="kw">unsafe</span> { <span class="ident">MmapMut</span>::<span class="ident">map_mut</span>(<span class="kw-2">&amp;</span><span class="ident">file</span>)<span class="question-mark">?</span> };
<span class="ident">mmap</span>.<span class="ident">copy_from_slice</span>(<span class="string">b&quot;Hello, world!&quot;</span>);</pre>
</div><h4 id='method.map_anon' class="method"><span id='map_anon.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.map_anon' class='fnname'>map_anon</a>(length: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/nightly/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="struct" href="../memmap/struct.MmapMut.html" title="struct memmap::MmapMut">MmapMut</a>&gt;</code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/memmap/lib.rs.html#478-480' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Creates an anonymous memory map.</p>
<p>This is equivalent to calling <code>MmapOptions::new().len(length).map_anon()</code>.</p>
<h1 id="errors-1" class="section-header"><a href="#errors-1">Errors</a></h1>
<p>This method returns an error when the underlying system call fails.</p>
</div><h4 id='method.flush' class="method"><span id='flush.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.flush' class='fnname'>flush</a>(&amp;self) -&gt; <a class="type" href="https://doc.rust-lang.org/nightly/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>&gt;</code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/memmap/lib.rs.html#515-518' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Flushes outstanding memory map modifications to disk.</p>
<p>When this method returns with a non-error result, all outstanding changes to a file-backed
memory map are guaranteed to be durably stored. The file's metadata (including last
modification timestamp) may not be updated.</p>
<h1 id="example-1" class="section-header"><a href="#example-1">Example</a></h1>
<pre class="rust rust-example-rendered">
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">fs</span>::<span class="ident">OpenOptions</span>;
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">io</span>::<span class="ident">Write</span>;
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">path</span>::<span class="ident">PathBuf</span>;
<span class="kw">use</span> <span class="ident">memmap</span>::<span class="ident">MmapMut</span>;
<span class="kw">let</span> <span class="ident">path</span>: <span class="ident">PathBuf</span> <span class="op">=</span> <span class="comment">/* path to file */</span>
<span class="kw">let</span> <span class="ident">file</span> <span class="op">=</span> <span class="ident">OpenOptions</span>::<span class="ident">new</span>().<span class="ident">read</span>(<span class="bool-val">true</span>).<span class="ident">write</span>(<span class="bool-val">true</span>).<span class="ident">create</span>(<span class="bool-val">true</span>).<span class="ident">open</span>(<span class="kw-2">&amp;</span><span class="ident">path</span>)<span class="question-mark">?</span>;
<span class="ident">file</span>.<span class="ident">set_len</span>(<span class="number">128</span>)<span class="question-mark">?</span>;
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">mmap</span> <span class="op">=</span> <span class="kw">unsafe</span> { <span class="ident">MmapMut</span>::<span class="ident">map_mut</span>(<span class="kw-2">&amp;</span><span class="ident">file</span>)<span class="question-mark">?</span> };
(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">mmap</span>[..]).<span class="ident">write_all</span>(<span class="string">b&quot;Hello, world!&quot;</span>)<span class="question-mark">?</span>;
<span class="ident">mmap</span>.<span class="ident">flush</span>()<span class="question-mark">?</span>;</pre>
</div><h4 id='method.flush_async' class="method"><span id='flush_async.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.flush_async' class='fnname'>flush_async</a>(&amp;self) -&gt; <a class="type" href="https://doc.rust-lang.org/nightly/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>&gt;</code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/memmap/lib.rs.html#525-528' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Asynchronously flushes outstanding memory map modifications to disk.</p>
<p>This method initiates flushing modified pages to durable storage, but it will not wait for
the operation to complete before returning. The file's metadata (including last
modification timestamp) may not be updated.</p>
</div><h4 id='method.flush_range' class="method"><span id='flush_range.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.flush_range' class='fnname'>flush_range</a>(&amp;self, offset: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>, len: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/nightly/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>&gt;</code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/memmap/lib.rs.html#539-541' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Flushes outstanding memory map modifications in the range to disk.</p>
<p>The offset and length must be in the bounds of the memory map.</p>
<p>When this method returns with a non-error result, all outstanding changes to a file-backed
memory in the range are guaranteed to be durable stored. The file's metadata (including
last modification timestamp) may not be updated. It is not guaranteed the only the changes
in the specified range are flushed; other outstanding changes to the memory map may be
flushed as well.</p>
</div><h4 id='method.flush_async_range' class="method"><span id='flush_async_range.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.flush_async_range' class='fnname'>flush_async_range</a>(&amp;self, offset: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>, len: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/nightly/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>&gt;</code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/memmap/lib.rs.html#552-554' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Asynchronously flushes outstanding memory map modifications in the range to disk.</p>
<p>The offset and length must be in the bounds of the memory map.</p>
<p>This method initiates flushing modified pages to durable storage, but it will not wait for
the operation to complete before returning. The file's metadata (including last
modification timestamp) may not be updated. It is not guaranteed that the only changes
flushed are those in the specified range; other outstanding changes to the memory map may
be flushed as well.</p>
</div><h4 id='method.make_read_only' class="method"><span id='make_read_only.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.make_read_only' class='fnname'>make_read_only</a>(self) -&gt; <a class="type" href="https://doc.rust-lang.org/nightly/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="struct" href="../memmap/struct.Mmap.html" title="struct memmap::Mmap">Mmap</a>&gt;</code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/memmap/lib.rs.html#585-588' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Returns an immutable version of this memory mapped buffer.</p>
<p>If the memory map is file-backed, the file must have been opened with read permissions.</p>
<h1 id="errors-2" class="section-header"><a href="#errors-2">Errors</a></h1>
<p>This method returns an error when the underlying system call fails, which can happen for a
variety of reasons, such as when the file has not been opened with read permissions.</p>
<h1 id="example-2" class="section-header"><a href="#example-2">Example</a></h1>
<pre class="rust rust-example-rendered">
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">io</span>::<span class="ident">Write</span>;
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">path</span>::<span class="ident">PathBuf</span>;
<span class="kw">use</span> <span class="ident">memmap</span>::{<span class="ident">Mmap</span>, <span class="ident">MmapMut</span>};
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">mmap</span> <span class="op">=</span> <span class="ident">MmapMut</span>::<span class="ident">map_anon</span>(<span class="number">128</span>)<span class="question-mark">?</span>;
(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">mmap</span>[..]).<span class="ident">write</span>(<span class="string">b&quot;Hello, world!&quot;</span>)<span class="question-mark">?</span>;
<span class="kw">let</span> <span class="ident">mmap</span>: <span class="ident">Mmap</span> <span class="op">=</span> <span class="ident">mmap</span>.<span class="ident">make_read_only</span>()<span class="question-mark">?</span>;</pre>
</div><h4 id='method.make_exec' class="method"><span id='make_exec.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.make_exec' class='fnname'>make_exec</a>(self) -&gt; <a class="type" href="https://doc.rust-lang.org/nightly/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="struct" href="../memmap/struct.Mmap.html" title="struct memmap::Mmap">Mmap</a>&gt;</code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/memmap/lib.rs.html#598-601' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Transition the memory map to be readable and executable.</p>
<p>If the memory map is file-backed, the file must have been opened with execute permissions.</p>
<h1 id="errors-3" class="section-header"><a href="#errors-3">Errors</a></h1>
<p>This method returns an error when the underlying system call fails, which can happen for a
variety of reasons, such as when the file has not been opened with execute permissions.</p>
</div></div>
<h2 id='deref-methods' class='small-section-header'>
Methods from <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/deref/trait.Deref.html" title="trait core::ops::deref::Deref">Deref</a>&lt;Target = <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.u8.html">u8</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>&gt;<a href='#deref-methods' class='anchor'></a>
</h2>
<div class='impl-items'><h4 id='method.len' class="method"><span id='len.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.len' class='fnname'>len</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/slice/mod.rs.html#122-126' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Returns the number of elements in the slice.</p>
<h1 id="examples" class="section-header"><a href="#examples">Examples</a></h1>
<pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="ident">a</span> <span class="op">=</span> [<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>];
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">a</span>.<span class="ident">len</span>(), <span class="number">3</span>);</pre>
</div><h4 id='method.is_empty' class="method"><span id='is_empty.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.is_empty' class='fnname'>is_empty</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/slice/mod.rs.html#138-140' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Returns <code>true</code> if the slice has a length of 0.</p>
<h1 id="examples-1" class="section-header"><a href="#examples-1">Examples</a></h1>
<pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="ident">a</span> <span class="op">=</span> [<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>];
<span class="macro">assert</span><span class="macro">!</span>(<span class="op">!</span><span class="ident">a</span>.<span class="ident">is_empty</span>());</pre>
</div><h4 id='method.first' class="method"><span id='first.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.first' class='fnname'>first</a>(&amp;self) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;</a>T&gt;</code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/slice/mod.rs.html#155-157' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Returns the first element of the slice, or <code>None</code> if it is empty.</p>
<h1 id="examples-2" class="section-header"><a href="#examples-2">Examples</a></h1>
<pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="ident">v</span> <span class="op">=</span> [<span class="number">10</span>, <span class="number">40</span>, <span class="number">30</span>];
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="prelude-val">Some</span>(<span class="kw-2">&amp;</span><span class="number">10</span>), <span class="ident">v</span>.<span class="ident">first</span>());
<span class="kw">let</span> <span class="ident">w</span>: <span class="kw-2">&amp;</span>[<span class="ident">i32</span>] <span class="op">=</span> <span class="kw-2">&amp;</span>[];
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="prelude-val">None</span>, <span class="ident">w</span>.<span class="ident">first</span>());</pre>
</div><h4 id='method.first_mut' class="method"><span id='first_mut.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.first_mut' class='fnname'>first_mut</a>(&amp;mut self) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;mut </a>T&gt;</code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/slice/mod.rs.html#173-175' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Returns a mutable pointer to the first element of the slice, or <code>None</code> if it is empty.</p>
<h1 id="examples-3" class="section-header"><a href="#examples-3">Examples</a></h1>
<pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="ident">x</span> <span class="op">=</span> <span class="kw-2">&amp;</span><span class="kw-2">mut</span> [<span class="number">0</span>, <span class="number">1</span>, <span class="number">2</span>];
<span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">first</span>) <span class="op">=</span> <span class="ident">x</span>.<span class="ident">first_mut</span>() {
<span class="kw-2">*</span><span class="ident">first</span> <span class="op">=</span> <span class="number">5</span>;
}
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">x</span>, <span class="kw-2">&amp;</span>[<span class="number">5</span>, <span class="number">1</span>, <span class="number">2</span>]);</pre>
</div><h4 id='method.split_first' class="method"><span id='split_first.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.split_first' class='fnname'>split_first</a>(&amp;self) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">(</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;</a>T, <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&amp;[T]</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">)</a>&gt;</code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.5.0'>1.5.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/slice/mod.rs.html#191-193' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Returns the first and all the rest of the elements of the slice, or <code>None</code> if it is empty.</p>
<h1 id="examples-4" class="section-header"><a href="#examples-4">Examples</a></h1>
<pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="ident">x</span> <span class="op">=</span> <span class="kw-2">&amp;</span>[<span class="number">0</span>, <span class="number">1</span>, <span class="number">2</span>];
<span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>((<span class="ident">first</span>, <span class="ident">elements</span>)) <span class="op">=</span> <span class="ident">x</span>.<span class="ident">split_first</span>() {
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">first</span>, <span class="kw-2">&amp;</span><span class="number">0</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">elements</span>, <span class="kw-2">&amp;</span>[<span class="number">1</span>, <span class="number">2</span>]);
}</pre>
</div><h4 id='method.split_first_mut' class="method"><span id='split_first_mut.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.split_first_mut' class='fnname'>split_first_mut</a>(&amp;mut self) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">(</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;mut </a>T, <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&amp;mut [T]</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">)</a>&gt;</code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.5.0'>1.5.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/slice/mod.rs.html#211-216' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Returns the first and all the rest of the elements of the slice, or <code>None</code> if it is empty.</p>
<h1 id="examples-5" class="section-header"><a href="#examples-5">Examples</a></h1>
<pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="ident">x</span> <span class="op">=</span> <span class="kw-2">&amp;</span><span class="kw-2">mut</span> [<span class="number">0</span>, <span class="number">1</span>, <span class="number">2</span>];
<span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>((<span class="ident">first</span>, <span class="ident">elements</span>)) <span class="op">=</span> <span class="ident">x</span>.<span class="ident">split_first_mut</span>() {
<span class="kw-2">*</span><span class="ident">first</span> <span class="op">=</span> <span class="number">3</span>;
<span class="ident">elements</span>[<span class="number">0</span>] <span class="op">=</span> <span class="number">4</span>;
<span class="ident">elements</span>[<span class="number">1</span>] <span class="op">=</span> <span class="number">5</span>;
}
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">x</span>, <span class="kw-2">&amp;</span>[<span class="number">3</span>, <span class="number">4</span>, <span class="number">5</span>]);</pre>
</div><h4 id='method.split_last' class="method"><span id='split_last.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.split_last' class='fnname'>split_last</a>(&amp;self) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">(</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;</a>T, <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&amp;[T]</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">)</a>&gt;</code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.5.0'>1.5.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/slice/mod.rs.html#232-235' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Returns the last and all the rest of the elements of the slice, or <code>None</code> if it is empty.</p>
<h1 id="examples-6" class="section-header"><a href="#examples-6">Examples</a></h1>
<pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="ident">x</span> <span class="op">=</span> <span class="kw-2">&amp;</span>[<span class="number">0</span>, <span class="number">1</span>, <span class="number">2</span>];
<span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>((<span class="ident">last</span>, <span class="ident">elements</span>)) <span class="op">=</span> <span class="ident">x</span>.<span class="ident">split_last</span>() {
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">last</span>, <span class="kw-2">&amp;</span><span class="number">2</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">elements</span>, <span class="kw-2">&amp;</span>[<span class="number">0</span>, <span class="number">1</span>]);
}</pre>
</div><h4 id='method.split_last_mut' class="method"><span id='split_last_mut.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.split_last_mut' class='fnname'>split_last_mut</a>(&amp;mut self) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">(</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;mut </a>T, <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&amp;mut [T]</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">)</a>&gt;</code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.5.0'>1.5.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/slice/mod.rs.html#253-260' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Returns the last and all the rest of the elements of the slice, or <code>None</code> if it is empty.</p>
<h1 id="examples-7" class="section-header"><a href="#examples-7">Examples</a></h1>
<pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="ident">x</span> <span class="op">=</span> <span class="kw-2">&amp;</span><span class="kw-2">mut</span> [<span class="number">0</span>, <span class="number">1</span>, <span class="number">2</span>];
<span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>((<span class="ident">last</span>, <span class="ident">elements</span>)) <span class="op">=</span> <span class="ident">x</span>.<span class="ident">split_last_mut</span>() {
<span class="kw-2">*</span><span class="ident">last</span> <span class="op">=</span> <span class="number">3</span>;
<span class="ident">elements</span>[<span class="number">0</span>] <span class="op">=</span> <span class="number">4</span>;
<span class="ident">elements</span>[<span class="number">1</span>] <span class="op">=</span> <span class="number">5</span>;
}
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">x</span>, <span class="kw-2">&amp;</span>[<span class="number">4</span>, <span class="number">5</span>, <span class="number">3</span>]);</pre>
</div><h4 id='method.last' class="method"><span id='last.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.last' class='fnname'>last</a>(&amp;self) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;</a>T&gt;</code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/slice/mod.rs.html#275-277' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Returns the last element of the slice, or <code>None</code> if it is empty.</p>
<h1 id="examples-8" class="section-header"><a href="#examples-8">Examples</a></h1>
<pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="ident">v</span> <span class="op">=</span> [<span class="number">10</span>, <span class="number">40</span>, <span class="number">30</span>];
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="prelude-val">Some</span>(<span class="kw-2">&amp;</span><span class="number">30</span>), <span class="ident">v</span>.<span class="ident">last</span>());
<span class="kw">let</span> <span class="ident">w</span>: <span class="kw-2">&amp;</span>[<span class="ident">i32</span>] <span class="op">=</span> <span class="kw-2">&amp;</span>[];
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="prelude-val">None</span>, <span class="ident">w</span>.<span class="ident">last</span>());</pre>
</div><h4 id='method.last_mut' class="method"><span id='last_mut.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.last_mut' class='fnname'>last_mut</a>(&amp;mut self) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;mut </a>T&gt;</code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/slice/mod.rs.html#293-297' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Returns a mutable pointer to the last item in the slice.</p>
<h1 id="examples-9" class="section-header"><a href="#examples-9">Examples</a></h1>
<pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="ident">x</span> <span class="op">=</span> <span class="kw-2">&amp;</span><span class="kw-2">mut</span> [<span class="number">0</span>, <span class="number">1</span>, <span class="number">2</span>];
<span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">last</span>) <span class="op">=</span> <span class="ident">x</span>.<span class="ident">last_mut</span>() {
<span class="kw-2">*</span><span class="ident">last</span> <span class="op">=</span> <span class="number">10</span>;
}
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">x</span>, <span class="kw-2">&amp;</span>[<span class="number">0</span>, <span class="number">1</span>, <span class="number">10</span>]);</pre>
</div><h4 id='method.get' class="method"><span id='get.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.get' class='fnname'>get</a>&lt;I&gt;(&amp;self, index: I) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a>&lt;&amp;&lt;I as <a class="trait" href="https://doc.rust-lang.org/nightly/core/slice/trait.SliceIndex.html" title="trait core::slice::SliceIndex">SliceIndex</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">[</a>T<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>&gt;&gt;::<a class="type" href="https://doc.rust-lang.org/nightly/core/slice/trait.SliceIndex.html#associatedtype.Output" title="type core::slice::SliceIndex::Output">Output</a>&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;I: <a class="trait" href="https://doc.rust-lang.org/nightly/core/slice/trait.SliceIndex.html" title="trait core::slice::SliceIndex">SliceIndex</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">[</a>T<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>&gt;,&nbsp;</span></code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/slice/mod.rs.html#318-322' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Returns a reference to an element or subslice depending on the type of
index.</p>
<ul>
<li>If given a position, returns a reference to the element at that
position or <code>None</code> if out of bounds.</li>
<li>If given a range, returns the subslice corresponding to that range,
or <code>None</code> if out of bounds.</li>
</ul>
<h1 id="examples-10" class="section-header"><a href="#examples-10">Examples</a></h1>
<pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="ident">v</span> <span class="op">=</span> [<span class="number">10</span>, <span class="number">40</span>, <span class="number">30</span>];
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="prelude-val">Some</span>(<span class="kw-2">&amp;</span><span class="number">40</span>), <span class="ident">v</span>.<span class="ident">get</span>(<span class="number">1</span>));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="prelude-val">Some</span>(<span class="kw-2">&amp;</span>[<span class="number">10</span>, <span class="number">40</span>][..]), <span class="ident">v</span>.<span class="ident">get</span>(<span class="number">0</span>..<span class="number">2</span>));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="prelude-val">None</span>, <span class="ident">v</span>.<span class="ident">get</span>(<span class="number">3</span>));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="prelude-val">None</span>, <span class="ident">v</span>.<span class="ident">get</span>(<span class="number">0</span>..<span class="number">4</span>));</pre>
</div><h4 id='method.get_mut' class="method"><span id='get_mut.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.get_mut' class='fnname'>get_mut</a>&lt;I&gt;(<br>&nbsp;&nbsp;&nbsp;&nbsp;&amp;mut self, <br>&nbsp;&nbsp;&nbsp;&nbsp;index: I<br>) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a>&lt;&amp;mut &lt;I as <a class="trait" href="https://doc.rust-lang.org/nightly/core/slice/trait.SliceIndex.html" title="trait core::slice::SliceIndex">SliceIndex</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">[</a>T<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>&gt;&gt;::<a class="type" href="https://doc.rust-lang.org/nightly/core/slice/trait.SliceIndex.html#associatedtype.Output" title="type core::slice::SliceIndex::Output">Output</a>&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;I: <a class="trait" href="https://doc.rust-lang.org/nightly/core/slice/trait.SliceIndex.html" title="trait core::slice::SliceIndex">SliceIndex</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">[</a>T<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>&gt;,&nbsp;</span></code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/slice/mod.rs.html#341-345' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Returns a mutable reference to an element or subslice depending on the
type of index (see <a href="#method.get"><code>get</code></a>) or <code>None</code> if the index is out of bounds.</p>
<h1 id="examples-11" class="section-header"><a href="#examples-11">Examples</a></h1>
<pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="ident">x</span> <span class="op">=</span> <span class="kw-2">&amp;</span><span class="kw-2">mut</span> [<span class="number">0</span>, <span class="number">1</span>, <span class="number">2</span>];
<span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">elem</span>) <span class="op">=</span> <span class="ident">x</span>.<span class="ident">get_mut</span>(<span class="number">1</span>) {
<span class="kw-2">*</span><span class="ident">elem</span> <span class="op">=</span> <span class="number">42</span>;
}
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">x</span>, <span class="kw-2">&amp;</span>[<span class="number">0</span>, <span class="number">42</span>, <span class="number">2</span>]);</pre>
</div><h4 id='method.get_unchecked' class="method"><span id='get_unchecked.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub unsafe fn <a href='#method.get_unchecked' class='fnname'>get_unchecked</a>&lt;I&gt;(<br>&nbsp;&nbsp;&nbsp;&nbsp;&amp;self, <br>&nbsp;&nbsp;&nbsp;&nbsp;index: I<br>) -&gt; &amp;&lt;I as <a class="trait" href="https://doc.rust-lang.org/nightly/core/slice/trait.SliceIndex.html" title="trait core::slice::SliceIndex">SliceIndex</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">[</a>T<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>&gt;&gt;::<a class="type" href="https://doc.rust-lang.org/nightly/core/slice/trait.SliceIndex.html#associatedtype.Output" title="type core::slice::SliceIndex::Output">Output</a> <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;I: <a class="trait" href="https://doc.rust-lang.org/nightly/core/slice/trait.SliceIndex.html" title="trait core::slice::SliceIndex">SliceIndex</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">[</a>T<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>&gt;,&nbsp;</span></code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/slice/mod.rs.html#366-370' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Returns a reference to an element or subslice, without doing bounds
checking.</p>
<p>This is generally not recommended, use with caution! For a safe
alternative see <a href="#method.get"><code>get</code></a>.</p>
<h1 id="examples-12" class="section-header"><a href="#examples-12">Examples</a></h1>
<pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="ident">x</span> <span class="op">=</span> <span class="kw-2">&amp;</span>[<span class="number">1</span>, <span class="number">2</span>, <span class="number">4</span>];
<span class="kw">unsafe</span> {
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">x</span>.<span class="ident">get_unchecked</span>(<span class="number">1</span>), <span class="kw-2">&amp;</span><span class="number">2</span>);
}</pre>
</div><h4 id='method.get_unchecked_mut' class="method"><span id='get_unchecked_mut.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub unsafe fn <a href='#method.get_unchecked_mut' class='fnname'>get_unchecked_mut</a>&lt;I&gt;(<br>&nbsp;&nbsp;&nbsp;&nbsp;&amp;mut self, <br>&nbsp;&nbsp;&nbsp;&nbsp;index: I<br>) -&gt; &amp;mut &lt;I as <a class="trait" href="https://doc.rust-lang.org/nightly/core/slice/trait.SliceIndex.html" title="trait core::slice::SliceIndex">SliceIndex</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">[</a>T<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>&gt;&gt;::<a class="type" href="https://doc.rust-lang.org/nightly/core/slice/trait.SliceIndex.html#associatedtype.Output" title="type core::slice::SliceIndex::Output">Output</a> <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;I: <a class="trait" href="https://doc.rust-lang.org/nightly/core/slice/trait.SliceIndex.html" title="trait core::slice::SliceIndex">SliceIndex</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">[</a>T<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>&gt;,&nbsp;</span></code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/slice/mod.rs.html#393-397' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Returns a mutable reference to an element or subslice, without doing
bounds checking.</p>
<p>This is generally not recommended, use with caution! For a safe
alternative see <a href="#method.get_mut"><code>get_mut</code></a>.</p>
<h1 id="examples-13" class="section-header"><a href="#examples-13">Examples</a></h1>
<pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="ident">x</span> <span class="op">=</span> <span class="kw-2">&amp;</span><span class="kw-2">mut</span> [<span class="number">1</span>, <span class="number">2</span>, <span class="number">4</span>];
<span class="kw">unsafe</span> {
<span class="kw">let</span> <span class="ident">elem</span> <span class="op">=</span> <span class="ident">x</span>.<span class="ident">get_unchecked_mut</span>(<span class="number">1</span>);
<span class="kw-2">*</span><span class="ident">elem</span> <span class="op">=</span> <span class="number">13</span>;
}
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">x</span>, <span class="kw-2">&amp;</span>[<span class="number">1</span>, <span class="number">13</span>, <span class="number">4</span>]);</pre>
</div><h4 id='method.as_ptr' class="method"><span id='as_ptr.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.as_ptr' class='fnname'>as_ptr</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.pointer.html">*const T</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/slice/mod.rs.html#421-423' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Returns a raw pointer to the slice's buffer.</p>
<p>The caller must ensure that the slice outlives the pointer this
function returns, or else it will end up pointing to garbage.</p>
<p>Modifying the container referenced by this slice may cause its buffer
to be reallocated, which would also make any pointers to it invalid.</p>
<h1 id="examples-14" class="section-header"><a href="#examples-14">Examples</a></h1>
<pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="ident">x</span> <span class="op">=</span> <span class="kw-2">&amp;</span>[<span class="number">1</span>, <span class="number">2</span>, <span class="number">4</span>];
<span class="kw">let</span> <span class="ident">x_ptr</span> <span class="op">=</span> <span class="ident">x</span>.<span class="ident">as_ptr</span>();
<span class="kw">unsafe</span> {
<span class="kw">for</span> <span class="ident">i</span> <span class="kw">in</span> <span class="number">0</span>..<span class="ident">x</span>.<span class="ident">len</span>() {
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">x</span>.<span class="ident">get_unchecked</span>(<span class="ident">i</span>), <span class="kw-2">&amp;</span><span class="kw-2">*</span><span class="ident">x_ptr</span>.<span class="ident">offset</span>(<span class="ident">i</span> <span class="kw">as</span> <span class="ident">isize</span>));
}
}</pre>
</div><h4 id='method.as_mut_ptr' class="method"><span id='as_mut_ptr.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.as_mut_ptr' class='fnname'>as_mut_ptr</a>(&amp;mut self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.pointer.html">*mut T</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/slice/mod.rs.html#448-450' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Returns an unsafe mutable pointer to the slice's buffer.</p>
<p>The caller must ensure that the slice outlives the pointer this
function returns, or else it will end up pointing to garbage.</p>
<p>Modifying the container referenced by this slice may cause its buffer
to be reallocated, which would also make any pointers to it invalid.</p>
<h1 id="examples-15" class="section-header"><a href="#examples-15">Examples</a></h1>
<pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="ident">x</span> <span class="op">=</span> <span class="kw-2">&amp;</span><span class="kw-2">mut</span> [<span class="number">1</span>, <span class="number">2</span>, <span class="number">4</span>];
<span class="kw">let</span> <span class="ident">x_ptr</span> <span class="op">=</span> <span class="ident">x</span>.<span class="ident">as_mut_ptr</span>();
<span class="kw">unsafe</span> {
<span class="kw">for</span> <span class="ident">i</span> <span class="kw">in</span> <span class="number">0</span>..<span class="ident">x</span>.<span class="ident">len</span>() {
<span class="kw-2">*</span><span class="ident">x_ptr</span>.<span class="ident">offset</span>(<span class="ident">i</span> <span class="kw">as</span> <span class="ident">isize</span>) <span class="op">+=</span> <span class="number">2</span>;
}
}
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">x</span>, <span class="kw-2">&amp;</span>[<span class="number">3</span>, <span class="number">4</span>, <span class="number">6</span>]);</pre>
</div><h4 id='method.swap' class="method"><span id='swap.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.swap' class='fnname'>swap</a>(&amp;mut self, a: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>, b: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>)</code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/slice/mod.rs.html#472-480' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Swaps two elements in the slice.</p>
<h1 id="arguments" class="section-header"><a href="#arguments">Arguments</a></h1>
<ul>
<li>a - The index of the first element</li>
<li>b - The index of the second element</li>
</ul>
<h1 id="panics" class="section-header"><a href="#panics">Panics</a></h1>
<p>Panics if <code>a</code> or <code>b</code> are out of bounds.</p>
<h1 id="examples-16" class="section-header"><a href="#examples-16">Examples</a></h1>
<pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">v</span> <span class="op">=</span> [<span class="string">&quot;a&quot;</span>, <span class="string">&quot;b&quot;</span>, <span class="string">&quot;c&quot;</span>, <span class="string">&quot;d&quot;</span>];
<span class="ident">v</span>.<span class="ident">swap</span>(<span class="number">1</span>, <span class="number">3</span>);
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">v</span> <span class="op">==</span> [<span class="string">&quot;a&quot;</span>, <span class="string">&quot;d&quot;</span>, <span class="string">&quot;c&quot;</span>, <span class="string">&quot;b&quot;</span>]);</pre>
</div><h4 id='method.reverse' class="method"><span id='reverse.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.reverse' class='fnname'>reverse</a>(&amp;mut self)</code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/slice/mod.rs.html#493-554' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Reverses the order of elements in the slice, in place.</p>
<h1 id="examples-17" class="section-header"><a href="#examples-17">Examples</a></h1>
<pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">v</span> <span class="op">=</span> [<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>];
<span class="ident">v</span>.<span class="ident">reverse</span>();
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">v</span> <span class="op">==</span> [<span class="number">3</span>, <span class="number">2</span>, <span class="number">1</span>]);</pre>
</div><h4 id='method.iter' class="method"><span id='iter.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.iter' class='fnname'>iter</a>(&amp;self) -&gt; <a class="struct" href="https://doc.rust-lang.org/nightly/core/slice/struct.Iter.html" title="struct core::slice::Iter">Iter</a>&lt;T&gt;</code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/slice/mod.rs.html#571-587' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Returns an iterator over the slice.</p>
<h1 id="examples-18" class="section-header"><a href="#examples-18">Examples</a></h1>
<pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="ident">x</span> <span class="op">=</span> <span class="kw-2">&amp;</span>[<span class="number">1</span>, <span class="number">2</span>, <span class="number">4</span>];
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">iterator</span> <span class="op">=</span> <span class="ident">x</span>.<span class="ident">iter</span>();
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">iterator</span>.<span class="ident">next</span>(), <span class="prelude-val">Some</span>(<span class="kw-2">&amp;</span><span class="number">1</span>));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">iterator</span>.<span class="ident">next</span>(), <span class="prelude-val">Some</span>(<span class="kw-2">&amp;</span><span class="number">2</span>));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">iterator</span>.<span class="ident">next</span>(), <span class="prelude-val">Some</span>(<span class="kw-2">&amp;</span><span class="number">4</span>));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">iterator</span>.<span class="ident">next</span>(), <span class="prelude-val">None</span>);</pre>
</div><h4 id='method.iter_mut' class="method"><span id='iter_mut.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.iter_mut' class='fnname'>iter_mut</a>(&amp;mut self) -&gt; <a class="struct" href="https://doc.rust-lang.org/nightly/core/slice/struct.IterMut.html" title="struct core::slice::IterMut">IterMut</a>&lt;T&gt;</code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/slice/mod.rs.html#602-618' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Returns an iterator that allows modifying each value.</p>
<h1 id="examples-19" class="section-header"><a href="#examples-19">Examples</a></h1>
<pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="ident">x</span> <span class="op">=</span> <span class="kw-2">&amp;</span><span class="kw-2">mut</span> [<span class="number">1</span>, <span class="number">2</span>, <span class="number">4</span>];
<span class="kw">for</span> <span class="ident">elem</span> <span class="kw">in</span> <span class="ident">x</span>.<span class="ident">iter_mut</span>() {
<span class="kw-2">*</span><span class="ident">elem</span> <span class="op">+=</span> <span class="number">2</span>;
}
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">x</span>, <span class="kw-2">&amp;</span>[<span class="number">3</span>, <span class="number">4</span>, <span class="number">6</span>]);</pre>
</div><h4 id='method.windows' class="method"><span id='windows.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.windows' class='fnname'>windows</a>(&amp;self, size: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>) -&gt; <a class="struct" href="https://doc.rust-lang.org/nightly/core/slice/struct.Windows.html" title="struct core::slice::Windows">Windows</a>&lt;T&gt;</code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/slice/mod.rs.html#648-651' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Returns an iterator over all contiguous windows of length
<code>size</code>. The windows overlap. If the slice is shorter than
<code>size</code>, the iterator returns no values.</p>
<h1 id="panics-1" class="section-header"><a href="#panics-1">Panics</a></h1>
<p>Panics if <code>size</code> is 0.</p>
<h1 id="examples-20" class="section-header"><a href="#examples-20">Examples</a></h1>
<pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="ident">slice</span> <span class="op">=</span> [<span class="string">&#39;r&#39;</span>, <span class="string">&#39;u&#39;</span>, <span class="string">&#39;s&#39;</span>, <span class="string">&#39;t&#39;</span>];
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">iter</span> <span class="op">=</span> <span class="ident">slice</span>.<span class="ident">windows</span>(<span class="number">2</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">iter</span>.<span class="ident">next</span>().<span class="ident">unwrap</span>(), <span class="kw-2">&amp;</span>[<span class="string">&#39;r&#39;</span>, <span class="string">&#39;u&#39;</span>]);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">iter</span>.<span class="ident">next</span>().<span class="ident">unwrap</span>(), <span class="kw-2">&amp;</span>[<span class="string">&#39;u&#39;</span>, <span class="string">&#39;s&#39;</span>]);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">iter</span>.<span class="ident">next</span>().<span class="ident">unwrap</span>(), <span class="kw-2">&amp;</span>[<span class="string">&#39;s&#39;</span>, <span class="string">&#39;t&#39;</span>]);
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">iter</span>.<span class="ident">next</span>().<span class="ident">is_none</span>());</pre>
<p>If the slice is shorter than <code>size</code>:</p>
<pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="ident">slice</span> <span class="op">=</span> [<span class="string">&#39;f&#39;</span>, <span class="string">&#39;o&#39;</span>, <span class="string">&#39;o&#39;</span>];
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">iter</span> <span class="op">=</span> <span class="ident">slice</span>.<span class="ident">windows</span>(<span class="number">4</span>);
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">iter</span>.<span class="ident">next</span>().<span class="ident">is_none</span>());</pre>
</div><h4 id='method.chunks' class="method"><span id='chunks.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.chunks' class='fnname'>chunks</a>(&amp;self, chunk_size: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>) -&gt; <a class="struct" href="https://doc.rust-lang.org/nightly/core/slice/struct.Chunks.html" title="struct core::slice::Chunks">Chunks</a>&lt;T&gt;</code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/slice/mod.rs.html#679-682' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Returns an iterator over <code>chunk_size</code> elements of the slice at a
time. The chunks are slices and do not overlap. If <code>chunk_size</code> does
not divide the length of the slice, then the last chunk will
not have length <code>chunk_size</code>.</p>
<p>See <a href="#method.exact_chunks"><code>exact_chunks</code></a> for a variant of this iterator that returns chunks
of always exactly <code>chunk_size</code> elements.</p>
<h1 id="panics-2" class="section-header"><a href="#panics-2">Panics</a></h1>
<p>Panics if <code>chunk_size</code> is 0.</p>
<h1 id="examples-21" class="section-header"><a href="#examples-21">Examples</a></h1>
<pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="ident">slice</span> <span class="op">=</span> [<span class="string">&#39;l&#39;</span>, <span class="string">&#39;o&#39;</span>, <span class="string">&#39;r&#39;</span>, <span class="string">&#39;e&#39;</span>, <span class="string">&#39;m&#39;</span>];
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">iter</span> <span class="op">=</span> <span class="ident">slice</span>.<span class="ident">chunks</span>(<span class="number">2</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">iter</span>.<span class="ident">next</span>().<span class="ident">unwrap</span>(), <span class="kw-2">&amp;</span>[<span class="string">&#39;l&#39;</span>, <span class="string">&#39;o&#39;</span>]);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">iter</span>.<span class="ident">next</span>().<span class="ident">unwrap</span>(), <span class="kw-2">&amp;</span>[<span class="string">&#39;r&#39;</span>, <span class="string">&#39;e&#39;</span>]);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">iter</span>.<span class="ident">next</span>().<span class="ident">unwrap</span>(), <span class="kw-2">&amp;</span>[<span class="string">&#39;m&#39;</span>]);
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">iter</span>.<span class="ident">next</span>().<span class="ident">is_none</span>());</pre>
</div><h4 id='method.exact_chunks' class="method"><span id='exact_chunks.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.exact_chunks' class='fnname'>exact_chunks</a>(&amp;self, chunk_size: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>) -&gt; <a class="struct" href="https://doc.rust-lang.org/nightly/core/slice/struct.ExactChunks.html" title="struct core::slice::ExactChunks">ExactChunks</a>&lt;T&gt;</code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/slice/mod.rs.html#712-717' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='stability'><div class='stab unstable'><span class=microscope>🔬</span> This is a nightly-only experimental API. (<code>exact_chunks</code>)</div></div><div class='docblock'><p>Returns an iterator over <code>chunk_size</code> elements of the slice at a
time. The chunks are slices and do not overlap. If <code>chunk_size</code> does
not divide the length of the slice, then the last up to <code>chunk_size-1</code>
elements will be omitted.</p>
<p>Due to each chunk having exactly <code>chunk_size</code> elements, the compiler
can often optimize the resulting code better than in the case of
<a href="#method.chunks"><code>chunks</code></a>.</p>
<h1 id="panics-3" class="section-header"><a href="#panics-3">Panics</a></h1>
<p>Panics if <code>chunk_size</code> is 0.</p>
<h1 id="examples-22" class="section-header"><a href="#examples-22">Examples</a></h1>
<pre class="rust rust-example-rendered">
<span class="attribute">#![<span class="ident">feature</span>(<span class="ident">exact_chunks</span>)]</span>
<span class="kw">let</span> <span class="ident">slice</span> <span class="op">=</span> [<span class="string">&#39;l&#39;</span>, <span class="string">&#39;o&#39;</span>, <span class="string">&#39;r&#39;</span>, <span class="string">&#39;e&#39;</span>, <span class="string">&#39;m&#39;</span>];
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">iter</span> <span class="op">=</span> <span class="ident">slice</span>.<span class="ident">exact_chunks</span>(<span class="number">2</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">iter</span>.<span class="ident">next</span>().<span class="ident">unwrap</span>(), <span class="kw-2">&amp;</span>[<span class="string">&#39;l&#39;</span>, <span class="string">&#39;o&#39;</span>]);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">iter</span>.<span class="ident">next</span>().<span class="ident">unwrap</span>(), <span class="kw-2">&amp;</span>[<span class="string">&#39;r&#39;</span>, <span class="string">&#39;e&#39;</span>]);
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">iter</span>.<span class="ident">next</span>().<span class="ident">is_none</span>());</pre>
</div><h4 id='method.chunks_mut' class="method"><span id='chunks_mut.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.chunks_mut' class='fnname'>chunks_mut</a>(&amp;mut self, chunk_size: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>) -&gt; <a class="struct" href="https://doc.rust-lang.org/nightly/core/slice/struct.ChunksMut.html" title="struct core::slice::ChunksMut">ChunksMut</a>&lt;T&gt;</code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/slice/mod.rs.html#749-752' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Returns an iterator over <code>chunk_size</code> elements of the slice at a time.
The chunks are mutable slices, and do not overlap. If <code>chunk_size</code> does
not divide the length of the slice, then the last chunk will not
have length <code>chunk_size</code>.</p>
<p>See <a href="#method.exact_chunks_mut"><code>exact_chunks_mut</code></a> for a variant of this iterator that returns chunks
of always exactly <code>chunk_size</code> elements.</p>
<h1 id="panics-4" class="section-header"><a href="#panics-4">Panics</a></h1>
<p>Panics if <code>chunk_size</code> is 0.</p>
<h1 id="examples-23" class="section-header"><a href="#examples-23">Examples</a></h1>
<pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="ident">v</span> <span class="op">=</span> <span class="kw-2">&amp;</span><span class="kw-2">mut</span> [<span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>];
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">count</span> <span class="op">=</span> <span class="number">1</span>;
<span class="kw">for</span> <span class="ident">chunk</span> <span class="kw">in</span> <span class="ident">v</span>.<span class="ident">chunks_mut</span>(<span class="number">2</span>) {
<span class="kw">for</span> <span class="ident">elem</span> <span class="kw">in</span> <span class="ident">chunk</span>.<span class="ident">iter_mut</span>() {
<span class="kw-2">*</span><span class="ident">elem</span> <span class="op">+=</span> <span class="ident">count</span>;
}
<span class="ident">count</span> <span class="op">+=</span> <span class="number">1</span>;
}
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">v</span>, <span class="kw-2">&amp;</span>[<span class="number">1</span>, <span class="number">1</span>, <span class="number">2</span>, <span class="number">2</span>, <span class="number">3</span>]);</pre>
</div><h4 id='method.exact_chunks_mut' class="method"><span id='exact_chunks_mut.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.exact_chunks_mut' class='fnname'>exact_chunks_mut</a>(&amp;mut self, chunk_size: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>) -&gt; <a class="struct" href="https://doc.rust-lang.org/nightly/core/slice/struct.ExactChunksMut.html" title="struct core::slice::ExactChunksMut">ExactChunksMut</a>&lt;T&gt;</code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/slice/mod.rs.html#788-793' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='stability'><div class='stab unstable'><span class=microscope>🔬</span> This is a nightly-only experimental API. (<code>exact_chunks</code>)</div></div><div class='docblock'><p>Returns an iterator over <code>chunk_size</code> elements of the slice at a time.
The chunks are mutable slices, and do not overlap. If <code>chunk_size</code> does
not divide the length of the slice, then the last up to <code>chunk_size-1</code>
elements will be omitted.</p>
<p>Due to each chunk having exactly <code>chunk_size</code> elements, the compiler
can often optimize the resulting code better than in the case of
<a href="#method.chunks_mut"><code>chunks_mut</code></a>.</p>
<h1 id="panics-5" class="section-header"><a href="#panics-5">Panics</a></h1>
<p>Panics if <code>chunk_size</code> is 0.</p>
<h1 id="examples-24" class="section-header"><a href="#examples-24">Examples</a></h1>
<pre class="rust rust-example-rendered">
<span class="attribute">#![<span class="ident">feature</span>(<span class="ident">exact_chunks</span>)]</span>
<span class="kw">let</span> <span class="ident">v</span> <span class="op">=</span> <span class="kw-2">&amp;</span><span class="kw-2">mut</span> [<span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>];
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">count</span> <span class="op">=</span> <span class="number">1</span>;
<span class="kw">for</span> <span class="ident">chunk</span> <span class="kw">in</span> <span class="ident">v</span>.<span class="ident">exact_chunks_mut</span>(<span class="number">2</span>) {
<span class="kw">for</span> <span class="ident">elem</span> <span class="kw">in</span> <span class="ident">chunk</span>.<span class="ident">iter_mut</span>() {
<span class="kw-2">*</span><span class="ident">elem</span> <span class="op">+=</span> <span class="ident">count</span>;
}
<span class="ident">count</span> <span class="op">+=</span> <span class="number">1</span>;
}
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">v</span>, <span class="kw-2">&amp;</span>[<span class="number">1</span>, <span class="number">1</span>, <span class="number">2</span>, <span class="number">2</span>, <span class="number">0</span>]);</pre>
</div><h4 id='method.split_at' class="method"><span id='split_at.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.split_at' class='fnname'>split_at</a>(&amp;self, mid: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">(</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&amp;[T]</a>, <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&amp;[T]</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">)</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/slice/mod.rs.html#830-832' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Divides one slice into two at an index.</p>
<p>The first will contain all indices from <code>[0, mid)</code> (excluding
the index <code>mid</code> itself) and the second will contain all
indices from <code>[mid, len)</code> (excluding the index <code>len</code> itself).</p>
<h1 id="panics-6" class="section-header"><a href="#panics-6">Panics</a></h1>
<p>Panics if <code>mid &gt; len</code>.</p>
<h1 id="examples-25" class="section-header"><a href="#examples-25">Examples</a></h1>
<pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="ident">v</span> <span class="op">=</span> [<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>, <span class="number">4</span>, <span class="number">5</span>, <span class="number">6</span>];
{
<span class="kw">let</span> (<span class="ident">left</span>, <span class="ident">right</span>) <span class="op">=</span> <span class="ident">v</span>.<span class="ident">split_at</span>(<span class="number">0</span>);
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">left</span> <span class="op">==</span> []);
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">right</span> <span class="op">==</span> [<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>, <span class="number">4</span>, <span class="number">5</span>, <span class="number">6</span>]);
}
{
<span class="kw">let</span> (<span class="ident">left</span>, <span class="ident">right</span>) <span class="op">=</span> <span class="ident">v</span>.<span class="ident">split_at</span>(<span class="number">2</span>);
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">left</span> <span class="op">==</span> [<span class="number">1</span>, <span class="number">2</span>]);
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">right</span> <span class="op">==</span> [<span class="number">3</span>, <span class="number">4</span>, <span class="number">5</span>, <span class="number">6</span>]);
}
{
<span class="kw">let</span> (<span class="ident">left</span>, <span class="ident">right</span>) <span class="op">=</span> <span class="ident">v</span>.<span class="ident">split_at</span>(<span class="number">6</span>);
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">left</span> <span class="op">==</span> [<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>, <span class="number">4</span>, <span class="number">5</span>, <span class="number">6</span>]);
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">right</span> <span class="op">==</span> []);
}</pre>
</div><h4 id='method.split_at_mut' class="method"><span id='split_at_mut.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.split_at_mut' class='fnname'>split_at_mut</a>(&amp;mut self, mid: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">(</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&amp;mut [T]</a>, <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&amp;mut [T]</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">)</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/slice/mod.rs.html#860-870' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Divides one mutable slice into two at an index.</p>
<p>The first will contain all indices from <code>[0, mid)</code> (excluding
the index <code>mid</code> itself) and the second will contain all
indices from <code>[mid, len)</code> (excluding the index <code>len</code> itself).</p>
<h1 id="panics-7" class="section-header"><a href="#panics-7">Panics</a></h1>
<p>Panics if <code>mid &gt; len</code>.</p>
<h1 id="examples-26" class="section-header"><a href="#examples-26">Examples</a></h1>
<pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">v</span> <span class="op">=</span> [<span class="number">1</span>, <span class="number">0</span>, <span class="number">3</span>, <span class="number">0</span>, <span class="number">5</span>, <span class="number">6</span>];
<span class="comment">// scoped to restrict the lifetime of the borrows</span>
{
<span class="kw">let</span> (<span class="ident">left</span>, <span class="ident">right</span>) <span class="op">=</span> <span class="ident">v</span>.<span class="ident">split_at_mut</span>(<span class="number">2</span>);
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">left</span> <span class="op">==</span> [<span class="number">1</span>, <span class="number">0</span>]);
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">right</span> <span class="op">==</span> [<span class="number">3</span>, <span class="number">0</span>, <span class="number">5</span>, <span class="number">6</span>]);
<span class="ident">left</span>[<span class="number">1</span>] <span class="op">=</span> <span class="number">2</span>;
<span class="ident">right</span>[<span class="number">1</span>] <span class="op">=</span> <span class="number">4</span>;
}
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">v</span> <span class="op">==</span> [<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>, <span class="number">4</span>, <span class="number">5</span>, <span class="number">6</span>]);</pre>
</div><h4 id='method.split' class="method"><span id='split.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.split' class='fnname'>split</a>&lt;F&gt;(&amp;self, pred: F) -&gt; <a class="struct" href="https://doc.rust-lang.org/nightly/core/slice/struct.Split.html" title="struct core::slice::Split">Split</a>&lt;T, F&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;</a>T) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a>,&nbsp;</span></code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/slice/mod.rs.html#914-922' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Returns an iterator over subslices separated by elements that match
<code>pred</code>. The matched element is not contained in the subslices.</p>
<h1 id="examples-27" class="section-header"><a href="#examples-27">Examples</a></h1>
<pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="ident">slice</span> <span class="op">=</span> [<span class="number">10</span>, <span class="number">40</span>, <span class="number">33</span>, <span class="number">20</span>];
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">iter</span> <span class="op">=</span> <span class="ident">slice</span>.<span class="ident">split</span>(<span class="op">|</span><span class="ident">num</span><span class="op">|</span> <span class="ident">num</span> <span class="op">%</span> <span class="number">3</span> <span class="op">==</span> <span class="number">0</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">iter</span>.<span class="ident">next</span>().<span class="ident">unwrap</span>(), <span class="kw-2">&amp;</span>[<span class="number">10</span>, <span class="number">40</span>]);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">iter</span>.<span class="ident">next</span>().<span class="ident">unwrap</span>(), <span class="kw-2">&amp;</span>[<span class="number">20</span>]);
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">iter</span>.<span class="ident">next</span>().<span class="ident">is_none</span>());</pre>
<p>If the first element is matched, an empty slice will be the first item
returned by the iterator. Similarly, if the last element in the slice
is matched, an empty slice will be the last item returned by the
iterator:</p>
<pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="ident">slice</span> <span class="op">=</span> [<span class="number">10</span>, <span class="number">40</span>, <span class="number">33</span>];
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">iter</span> <span class="op">=</span> <span class="ident">slice</span>.<span class="ident">split</span>(<span class="op">|</span><span class="ident">num</span><span class="op">|</span> <span class="ident">num</span> <span class="op">%</span> <span class="number">3</span> <span class="op">==</span> <span class="number">0</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">iter</span>.<span class="ident">next</span>().<span class="ident">unwrap</span>(), <span class="kw-2">&amp;</span>[<span class="number">10</span>, <span class="number">40</span>]);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">iter</span>.<span class="ident">next</span>().<span class="ident">unwrap</span>(), <span class="kw-2">&amp;</span>[]);
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">iter</span>.<span class="ident">next</span>().<span class="ident">is_none</span>());</pre>
<p>If two matched elements are directly adjacent, an empty slice will be
present between them:</p>
<pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="ident">slice</span> <span class="op">=</span> [<span class="number">10</span>, <span class="number">6</span>, <span class="number">33</span>, <span class="number">20</span>];
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">iter</span> <span class="op">=</span> <span class="ident">slice</span>.<span class="ident">split</span>(<span class="op">|</span><span class="ident">num</span><span class="op">|</span> <span class="ident">num</span> <span class="op">%</span> <span class="number">3</span> <span class="op">==</span> <span class="number">0</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">iter</span>.<span class="ident">next</span>().<span class="ident">unwrap</span>(), <span class="kw-2">&amp;</span>[<span class="number">10</span>]);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">iter</span>.<span class="ident">next</span>().<span class="ident">unwrap</span>(), <span class="kw-2">&amp;</span>[]);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">iter</span>.<span class="ident">next</span>().<span class="ident">unwrap</span>(), <span class="kw-2">&amp;</span>[<span class="number">20</span>]);
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">iter</span>.<span class="ident">next</span>().<span class="ident">is_none</span>());</pre>
</div><h4 id='method.split_mut' class="method"><span id='split_mut.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.split_mut' class='fnname'>split_mut</a>&lt;F&gt;(&amp;mut self, pred: F) -&gt; <a class="struct" href="https://doc.rust-lang.org/nightly/core/slice/struct.SplitMut.html" title="struct core::slice::SplitMut">SplitMut</a>&lt;T, F&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;</a>T) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a>,&nbsp;</span></code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/slice/mod.rs.html#939-943' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Returns an iterator over mutable subslices separated by elements that
match <code>pred</code>. The matched element is not contained in the subslices.</p>
<h1 id="examples-28" class="section-header"><a href="#examples-28">Examples</a></h1>
<pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">v</span> <span class="op">=</span> [<span class="number">10</span>, <span class="number">40</span>, <span class="number">30</span>, <span class="number">20</span>, <span class="number">60</span>, <span class="number">50</span>];
<span class="kw">for</span> <span class="ident">group</span> <span class="kw">in</span> <span class="ident">v</span>.<span class="ident">split_mut</span>(<span class="op">|</span><span class="ident">num</span><span class="op">|</span> <span class="kw-2">*</span><span class="ident">num</span> <span class="op">%</span> <span class="number">3</span> <span class="op">==</span> <span class="number">0</span>) {
<span class="ident">group</span>[<span class="number">0</span>] <span class="op">=</span> <span class="number">1</span>;
}
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">v</span>, [<span class="number">1</span>, <span class="number">40</span>, <span class="number">30</span>, <span class="number">1</span>, <span class="number">60</span>, <span class="number">1</span>]);</pre>
</div><h4 id='method.rsplit' class="method"><span id='rsplit.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.rsplit' class='fnname'>rsplit</a>&lt;F&gt;(&amp;self, pred: F) -&gt; <a class="struct" href="https://doc.rust-lang.org/nightly/core/slice/struct.RSplit.html" title="struct core::slice::RSplit">RSplit</a>&lt;T, F&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;</a>T) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a>,&nbsp;</span></code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.27.0'>1.27.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/slice/mod.rs.html#974-978' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Returns an iterator over subslices separated by elements that match
<code>pred</code>, starting at the end of the slice and working backwards.
The matched element is not contained in the subslices.</p>
<h1 id="examples-29" class="section-header"><a href="#examples-29">Examples</a></h1>
<pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="ident">slice</span> <span class="op">=</span> [<span class="number">11</span>, <span class="number">22</span>, <span class="number">33</span>, <span class="number">0</span>, <span class="number">44</span>, <span class="number">55</span>];
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">iter</span> <span class="op">=</span> <span class="ident">slice</span>.<span class="ident">rsplit</span>(<span class="op">|</span><span class="ident">num</span><span class="op">|</span> <span class="kw-2">*</span><span class="ident">num</span> <span class="op">==</span> <span class="number">0</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">iter</span>.<span class="ident">next</span>().<span class="ident">unwrap</span>(), <span class="kw-2">&amp;</span>[<span class="number">44</span>, <span class="number">55</span>]);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">iter</span>.<span class="ident">next</span>().<span class="ident">unwrap</span>(), <span class="kw-2">&amp;</span>[<span class="number">11</span>, <span class="number">22</span>, <span class="number">33</span>]);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">iter</span>.<span class="ident">next</span>(), <span class="prelude-val">None</span>);</pre>
<p>As with <code>split()</code>, if the first or last element is matched, an empty
slice will be the first (or last) item returned by the iterator.</p>
<pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="ident">v</span> <span class="op">=</span> <span class="kw-2">&amp;</span>[<span class="number">0</span>, <span class="number">1</span>, <span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>, <span class="number">5</span>, <span class="number">8</span>];
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">it</span> <span class="op">=</span> <span class="ident">v</span>.<span class="ident">rsplit</span>(<span class="op">|</span><span class="ident">n</span><span class="op">|</span> <span class="kw-2">*</span><span class="ident">n</span> <span class="op">%</span> <span class="number">2</span> <span class="op">==</span> <span class="number">0</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">it</span>.<span class="ident">next</span>().<span class="ident">unwrap</span>(), <span class="kw-2">&amp;</span>[]);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">it</span>.<span class="ident">next</span>().<span class="ident">unwrap</span>(), <span class="kw-2">&amp;</span>[<span class="number">3</span>, <span class="number">5</span>]);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">it</span>.<span class="ident">next</span>().<span class="ident">unwrap</span>(), <span class="kw-2">&amp;</span>[<span class="number">1</span>, <span class="number">1</span>]);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">it</span>.<span class="ident">next</span>().<span class="ident">unwrap</span>(), <span class="kw-2">&amp;</span>[]);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">it</span>.<span class="ident">next</span>(), <span class="prelude-val">None</span>);</pre>
</div><h4 id='method.rsplit_mut' class="method"><span id='rsplit_mut.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.rsplit_mut' class='fnname'>rsplit_mut</a>&lt;F&gt;(&amp;mut self, pred: F) -&gt; <a class="struct" href="https://doc.rust-lang.org/nightly/core/slice/struct.RSplitMut.html" title="struct core::slice::RSplitMut">RSplitMut</a>&lt;T, F&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;</a>T) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a>,&nbsp;</span></code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.27.0'>1.27.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/slice/mod.rs.html#999-1003' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Returns an iterator over mutable subslices separated by elements that
match <code>pred</code>, starting at the end of the slice and working
backwards. The matched element is not contained in the subslices.</p>
<h1 id="examples-30" class="section-header"><a href="#examples-30">Examples</a></h1>
<pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">v</span> <span class="op">=</span> [<span class="number">100</span>, <span class="number">400</span>, <span class="number">300</span>, <span class="number">200</span>, <span class="number">600</span>, <span class="number">500</span>];
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">count</span> <span class="op">=</span> <span class="number">0</span>;
<span class="kw">for</span> <span class="ident">group</span> <span class="kw">in</span> <span class="ident">v</span>.<span class="ident">rsplit_mut</span>(<span class="op">|</span><span class="ident">num</span><span class="op">|</span> <span class="kw-2">*</span><span class="ident">num</span> <span class="op">%</span> <span class="number">3</span> <span class="op">==</span> <span class="number">0</span>) {
<span class="ident">count</span> <span class="op">+=</span> <span class="number">1</span>;
<span class="ident">group</span>[<span class="number">0</span>] <span class="op">=</span> <span class="ident">count</span>;
}
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">v</span>, [<span class="number">3</span>, <span class="number">400</span>, <span class="number">300</span>, <span class="number">2</span>, <span class="number">600</span>, <span class="number">1</span>]);</pre>
</div><h4 id='method.splitn' class="method"><span id='splitn.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.splitn' class='fnname'>splitn</a>&lt;F&gt;(&amp;self, n: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>, pred: F) -&gt; <a class="struct" href="https://doc.rust-lang.org/nightly/core/slice/struct.SplitN.html" title="struct core::slice::SplitN">SplitN</a>&lt;T, F&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;</a>T) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a>,&nbsp;</span></code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/slice/mod.rs.html#1026-1035' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Returns an iterator over subslices separated by elements that match
<code>pred</code>, limited to returning at most <code>n</code> items. The matched element is
not contained in the subslices.</p>
<p>The last element returned, if any, will contain the remainder of the
slice.</p>
<h1 id="examples-31" class="section-header"><a href="#examples-31">Examples</a></h1>
<p>Print the slice split once by numbers divisible by 3 (i.e. <code>[10, 40]</code>,
<code>[20, 60, 50]</code>):</p>
<pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="ident">v</span> <span class="op">=</span> [<span class="number">10</span>, <span class="number">40</span>, <span class="number">30</span>, <span class="number">20</span>, <span class="number">60</span>, <span class="number">50</span>];
<span class="kw">for</span> <span class="ident">group</span> <span class="kw">in</span> <span class="ident">v</span>.<span class="ident">splitn</span>(<span class="number">2</span>, <span class="op">|</span><span class="ident">num</span><span class="op">|</span> <span class="kw-2">*</span><span class="ident">num</span> <span class="op">%</span> <span class="number">3</span> <span class="op">==</span> <span class="number">0</span>) {
<span class="macro">println</span><span class="macro">!</span>(<span class="string">&quot;{:?}&quot;</span>, <span class="ident">group</span>);
}</pre>
</div><h4 id='method.splitn_mut' class="method"><span id='splitn_mut.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.splitn_mut' class='fnname'>splitn_mut</a>&lt;F&gt;(&amp;mut self, n: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>, pred: F) -&gt; <a class="struct" href="https://doc.rust-lang.org/nightly/core/slice/struct.SplitNMut.html" title="struct core::slice::SplitNMut">SplitNMut</a>&lt;T, F&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;</a>T) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a>,&nbsp;</span></code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/slice/mod.rs.html#1056-1065' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Returns an iterator over subslices separated by elements that match
<code>pred</code>, limited to returning at most <code>n</code> items. The matched element is
not contained in the subslices.</p>
<p>The last element returned, if any, will contain the remainder of the
slice.</p>
<h1 id="examples-32" class="section-header"><a href="#examples-32">Examples</a></h1>
<pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">v</span> <span class="op">=</span> [<span class="number">10</span>, <span class="number">40</span>, <span class="number">30</span>, <span class="number">20</span>, <span class="number">60</span>, <span class="number">50</span>];
<span class="kw">for</span> <span class="ident">group</span> <span class="kw">in</span> <span class="ident">v</span>.<span class="ident">splitn_mut</span>(<span class="number">2</span>, <span class="op">|</span><span class="ident">num</span><span class="op">|</span> <span class="kw-2">*</span><span class="ident">num</span> <span class="op">%</span> <span class="number">3</span> <span class="op">==</span> <span class="number">0</span>) {
<span class="ident">group</span>[<span class="number">0</span>] <span class="op">=</span> <span class="number">1</span>;
}
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">v</span>, [<span class="number">1</span>, <span class="number">40</span>, <span class="number">30</span>, <span class="number">1</span>, <span class="number">60</span>, <span class="number">50</span>]);</pre>
</div><h4 id='method.rsplitn' class="method"><span id='rsplitn.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.rsplitn' class='fnname'>rsplitn</a>&lt;F&gt;(&amp;self, n: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>, pred: F) -&gt; <a class="struct" href="https://doc.rust-lang.org/nightly/core/slice/struct.RSplitN.html" title="struct core::slice::RSplitN">RSplitN</a>&lt;T, F&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;</a>T) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a>,&nbsp;</span></code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/slice/mod.rs.html#1089-1098' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Returns an iterator over subslices separated by elements that match
<code>pred</code> limited to returning at most <code>n</code> items. This starts at the end of
the slice and works backwards. The matched element is not contained in
the subslices.</p>
<p>The last element returned, if any, will contain the remainder of the
slice.</p>
<h1 id="examples-33" class="section-header"><a href="#examples-33">Examples</a></h1>
<p>Print the slice split once, starting from the end, by numbers divisible
by 3 (i.e. <code>[50]</code>, <code>[10, 40, 30, 20]</code>):</p>
<pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="ident">v</span> <span class="op">=</span> [<span class="number">10</span>, <span class="number">40</span>, <span class="number">30</span>, <span class="number">20</span>, <span class="number">60</span>, <span class="number">50</span>];
<span class="kw">for</span> <span class="ident">group</span> <span class="kw">in</span> <span class="ident">v</span>.<span class="ident">rsplitn</span>(<span class="number">2</span>, <span class="op">|</span><span class="ident">num</span><span class="op">|</span> <span class="kw-2">*</span><span class="ident">num</span> <span class="op">%</span> <span class="number">3</span> <span class="op">==</span> <span class="number">0</span>) {
<span class="macro">println</span><span class="macro">!</span>(<span class="string">&quot;{:?}&quot;</span>, <span class="ident">group</span>);
}</pre>
</div><h4 id='method.rsplitn_mut' class="method"><span id='rsplitn_mut.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.rsplitn_mut' class='fnname'>rsplitn_mut</a>&lt;F&gt;(&amp;mut self, n: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>, pred: F) -&gt; <a class="struct" href="https://doc.rust-lang.org/nightly/core/slice/struct.RSplitNMut.html" title="struct core::slice::RSplitNMut">RSplitNMut</a>&lt;T, F&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;</a>T) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a>,&nbsp;</span></code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/slice/mod.rs.html#1120-1129' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Returns an iterator over subslices separated by elements that match
<code>pred</code> limited to returning at most <code>n</code> items. This starts at the end of
the slice and works backwards. The matched element is not contained in
the subslices.</p>
<p>The last element returned, if any, will contain the remainder of the
slice.</p>
<h1 id="examples-34" class="section-header"><a href="#examples-34">Examples</a></h1>
<pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">s</span> <span class="op">=</span> [<span class="number">10</span>, <span class="number">40</span>, <span class="number">30</span>, <span class="number">20</span>, <span class="number">60</span>, <span class="number">50</span>];
<span class="kw">for</span> <span class="ident">group</span> <span class="kw">in</span> <span class="ident">s</span>.<span class="ident">rsplitn_mut</span>(<span class="number">2</span>, <span class="op">|</span><span class="ident">num</span><span class="op">|</span> <span class="kw-2">*</span><span class="ident">num</span> <span class="op">%</span> <span class="number">3</span> <span class="op">==</span> <span class="number">0</span>) {
<span class="ident">group</span>[<span class="number">0</span>] <span class="op">=</span> <span class="number">1</span>;
}
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">s</span>, [<span class="number">1</span>, <span class="number">40</span>, <span class="number">30</span>, <span class="number">20</span>, <span class="number">60</span>, <span class="number">1</span>]);</pre>
</div><h4 id='method.contains' class="method"><span id='contains.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.contains' class='fnname'>contains</a>(&amp;self, x: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;</a>T) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a> <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;T: <a class="trait" href="https://doc.rust-lang.org/nightly/core/cmp/trait.PartialEq.html" title="trait core::cmp::PartialEq">PartialEq</a>&lt;T&gt;,&nbsp;</span></code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/slice/mod.rs.html#1141-1145' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Returns <code>true</code> if the slice contains an element with the given value.</p>
<h1 id="examples-35" class="section-header"><a href="#examples-35">Examples</a></h1>
<pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="ident">v</span> <span class="op">=</span> [<span class="number">10</span>, <span class="number">40</span>, <span class="number">30</span>];
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">v</span>.<span class="ident">contains</span>(<span class="kw-2">&amp;</span><span class="number">30</span>));
<span class="macro">assert</span><span class="macro">!</span>(<span class="op">!</span><span class="ident">v</span>.<span class="ident">contains</span>(<span class="kw-2">&amp;</span><span class="number">50</span>));</pre>
</div><h4 id='method.starts_with' class="method"><span id='starts_with.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.starts_with' class='fnname'>starts_with</a>(&amp;self, needle: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&amp;[T]</a>) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a> <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;T: <a class="trait" href="https://doc.rust-lang.org/nightly/core/cmp/trait.PartialEq.html" title="trait core::cmp::PartialEq">PartialEq</a>&lt;T&gt;,&nbsp;</span></code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/slice/mod.rs.html#1168-1173' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Returns <code>true</code> if <code>needle</code> is a prefix of the slice.</p>
<h1 id="examples-36" class="section-header"><a href="#examples-36">Examples</a></h1>
<pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="ident">v</span> <span class="op">=</span> [<span class="number">10</span>, <span class="number">40</span>, <span class="number">30</span>];
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">v</span>.<span class="ident">starts_with</span>(<span class="kw-2">&amp;</span>[<span class="number">10</span>]));
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">v</span>.<span class="ident">starts_with</span>(<span class="kw-2">&amp;</span>[<span class="number">10</span>, <span class="number">40</span>]));
<span class="macro">assert</span><span class="macro">!</span>(<span class="op">!</span><span class="ident">v</span>.<span class="ident">starts_with</span>(<span class="kw-2">&amp;</span>[<span class="number">50</span>]));
<span class="macro">assert</span><span class="macro">!</span>(<span class="op">!</span><span class="ident">v</span>.<span class="ident">starts_with</span>(<span class="kw-2">&amp;</span>[<span class="number">10</span>, <span class="number">50</span>]));</pre>
<p>Always returns <code>true</code> if <code>needle</code> is an empty slice:</p>
<pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="ident">v</span> <span class="op">=</span> <span class="kw-2">&amp;</span>[<span class="number">10</span>, <span class="number">40</span>, <span class="number">30</span>];
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">v</span>.<span class="ident">starts_with</span>(<span class="kw-2">&amp;</span>[]));
<span class="kw">let</span> <span class="ident">v</span>: <span class="kw-2">&amp;</span>[<span class="ident">u8</span>] <span class="op">=</span> <span class="kw-2">&amp;</span>[];
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">v</span>.<span class="ident">starts_with</span>(<span class="kw-2">&amp;</span>[]));</pre>
</div><h4 id='method.ends_with' class="method"><span id='ends_with.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.ends_with' class='fnname'>ends_with</a>(&amp;self, needle: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&amp;[T]</a>) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a> <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;T: <a class="trait" href="https://doc.rust-lang.org/nightly/core/cmp/trait.PartialEq.html" title="trait core::cmp::PartialEq">PartialEq</a>&lt;T&gt;,&nbsp;</span></code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/slice/mod.rs.html#1196-1201' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Returns <code>true</code> if <code>needle</code> is a suffix of the slice.</p>
<h1 id="examples-37" class="section-header"><a href="#examples-37">Examples</a></h1>
<pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="ident">v</span> <span class="op">=</span> [<span class="number">10</span>, <span class="number">40</span>, <span class="number">30</span>];
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">v</span>.<span class="ident">ends_with</span>(<span class="kw-2">&amp;</span>[<span class="number">30</span>]));
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">v</span>.<span class="ident">ends_with</span>(<span class="kw-2">&amp;</span>[<span class="number">40</span>, <span class="number">30</span>]));
<span class="macro">assert</span><span class="macro">!</span>(<span class="op">!</span><span class="ident">v</span>.<span class="ident">ends_with</span>(<span class="kw-2">&amp;</span>[<span class="number">50</span>]));
<span class="macro">assert</span><span class="macro">!</span>(<span class="op">!</span><span class="ident">v</span>.<span class="ident">ends_with</span>(<span class="kw-2">&amp;</span>[<span class="number">50</span>, <span class="number">30</span>]));</pre>
<p>Always returns <code>true</code> if <code>needle</code> is an empty slice:</p>
<pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="ident">v</span> <span class="op">=</span> <span class="kw-2">&amp;</span>[<span class="number">10</span>, <span class="number">40</span>, <span class="number">30</span>];
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">v</span>.<span class="ident">ends_with</span>(<span class="kw-2">&amp;</span>[]));
<span class="kw">let</span> <span class="ident">v</span>: <span class="kw-2">&amp;</span>[<span class="ident">u8</span>] <span class="op">=</span> <span class="kw-2">&amp;</span>[];
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">v</span>.<span class="ident">ends_with</span>(<span class="kw-2">&amp;</span>[]));</pre>
</div><h4 id='method.binary_search' class="method"><span id='binary_search.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.binary_search' class='fnname'>binary_search</a>(&amp;self, x: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;</a>T) -&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.usize.html">usize</a>, <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;T: <a class="trait" href="https://doc.rust-lang.org/nightly/core/cmp/trait.Ord.html" title="trait core::cmp::Ord">Ord</a>,&nbsp;</span></code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/slice/mod.rs.html#1226-1230' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Binary searches this sorted slice for a given element.</p>
<p>If the value is found then <code>Ok</code> is returned, containing the
index of the matching element; if the value is not found then
<code>Err</code> is returned, containing the index where a matching
element could be inserted while maintaining sorted order.</p>
<h1 id="examples-38" class="section-header"><a href="#examples-38">Examples</a></h1>
<p>Looks up a series of four elements. The first is found, with a
uniquely determined position; the second and third are not
found; the fourth could match any position in <code>[1, 4]</code>.</p>
<pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="ident">s</span> <span class="op">=</span> [<span class="number">0</span>, <span class="number">1</span>, <span class="number">1</span>, <span class="number">1</span>, <span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>, <span class="number">5</span>, <span class="number">8</span>, <span class="number">13</span>, <span class="number">21</span>, <span class="number">34</span>, <span class="number">55</span>];
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">s</span>.<span class="ident">binary_search</span>(<span class="kw-2">&amp;</span><span class="number">13</span>), <span class="prelude-val">Ok</span>(<span class="number">9</span>));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">s</span>.<span class="ident">binary_search</span>(<span class="kw-2">&amp;</span><span class="number">4</span>), <span class="prelude-val">Err</span>(<span class="number">7</span>));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">s</span>.<span class="ident">binary_search</span>(<span class="kw-2">&amp;</span><span class="number">100</span>), <span class="prelude-val">Err</span>(<span class="number">13</span>));
<span class="kw">let</span> <span class="ident">r</span> <span class="op">=</span> <span class="ident">s</span>.<span class="ident">binary_search</span>(<span class="kw-2">&amp;</span><span class="number">1</span>);
<span class="macro">assert</span><span class="macro">!</span>(<span class="kw">match</span> <span class="ident">r</span> { <span class="prelude-val">Ok</span>(<span class="number">1</span>...<span class="number">4</span>) <span class="op">=&gt;</span> <span class="bool-val">true</span>, <span class="kw">_</span> <span class="op">=&gt;</span> <span class="bool-val">false</span>, });</pre>
</div><h4 id='method.binary_search_by' class="method"><span id='binary_search_by.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.binary_search_by' class='fnname'>binary_search_by</a>&lt;'a, F&gt;(&amp;'a self, f: F) -&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.usize.html">usize</a>, <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;'a </a>T) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/cmp/enum.Ordering.html" title="enum core::cmp::Ordering">Ordering</a>,&nbsp;</span></code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/slice/mod.rs.html#1265-1288' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Binary searches this sorted slice with a comparator function.</p>
<p>The comparator function should implement an order consistent
with the sort order of the underlying slice, returning an
order code that indicates whether its argument is <code>Less</code>,
<code>Equal</code> or <code>Greater</code> the desired target.</p>
<p>If a matching value is found then returns <code>Ok</code>, containing
the index for the matched element; if no match is found then
<code>Err</code> is returned, containing the index where a matching
element could be inserted while maintaining sorted order.</p>
<h1 id="examples-39" class="section-header"><a href="#examples-39">Examples</a></h1>
<p>Looks up a series of four elements. The first is found, with a
uniquely determined position; the second and third are not
found; the fourth could match any position in <code>[1, 4]</code>.</p>
<pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="ident">s</span> <span class="op">=</span> [<span class="number">0</span>, <span class="number">1</span>, <span class="number">1</span>, <span class="number">1</span>, <span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>, <span class="number">5</span>, <span class="number">8</span>, <span class="number">13</span>, <span class="number">21</span>, <span class="number">34</span>, <span class="number">55</span>];
<span class="kw">let</span> <span class="ident">seek</span> <span class="op">=</span> <span class="number">13</span>;
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">s</span>.<span class="ident">binary_search_by</span>(<span class="op">|</span><span class="ident">probe</span><span class="op">|</span> <span class="ident">probe</span>.<span class="ident">cmp</span>(<span class="kw-2">&amp;</span><span class="ident">seek</span>)), <span class="prelude-val">Ok</span>(<span class="number">9</span>));
<span class="kw">let</span> <span class="ident">seek</span> <span class="op">=</span> <span class="number">4</span>;
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">s</span>.<span class="ident">binary_search_by</span>(<span class="op">|</span><span class="ident">probe</span><span class="op">|</span> <span class="ident">probe</span>.<span class="ident">cmp</span>(<span class="kw-2">&amp;</span><span class="ident">seek</span>)), <span class="prelude-val">Err</span>(<span class="number">7</span>));
<span class="kw">let</span> <span class="ident">seek</span> <span class="op">=</span> <span class="number">100</span>;
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">s</span>.<span class="ident">binary_search_by</span>(<span class="op">|</span><span class="ident">probe</span><span class="op">|</span> <span class="ident">probe</span>.<span class="ident">cmp</span>(<span class="kw-2">&amp;</span><span class="ident">seek</span>)), <span class="prelude-val">Err</span>(<span class="number">13</span>));
<span class="kw">let</span> <span class="ident">seek</span> <span class="op">=</span> <span class="number">1</span>;
<span class="kw">let</span> <span class="ident">r</span> <span class="op">=</span> <span class="ident">s</span>.<span class="ident">binary_search_by</span>(<span class="op">|</span><span class="ident">probe</span><span class="op">|</span> <span class="ident">probe</span>.<span class="ident">cmp</span>(<span class="kw-2">&amp;</span><span class="ident">seek</span>));
<span class="macro">assert</span><span class="macro">!</span>(<span class="kw">match</span> <span class="ident">r</span> { <span class="prelude-val">Ok</span>(<span class="number">1</span>...<span class="number">4</span>) <span class="op">=&gt;</span> <span class="bool-val">true</span>, <span class="kw">_</span> <span class="op">=&gt;</span> <span class="bool-val">false</span>, });</pre>
</div><h4 id='method.binary_search_by_key' class="method"><span id='binary_search_by_key.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.binary_search_by_key' class='fnname'>binary_search_by_key</a>&lt;'a, B, F&gt;(<br>&nbsp;&nbsp;&nbsp;&nbsp;&amp;'a self, <br>&nbsp;&nbsp;&nbsp;&nbsp;b: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;</a>B, <br>&nbsp;&nbsp;&nbsp;&nbsp;f: F<br>) -&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.usize.html">usize</a>, <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;B: <a class="trait" href="https://doc.rust-lang.org/nightly/core/cmp/trait.Ord.html" title="trait core::cmp::Ord">Ord</a>,<br>&nbsp;&nbsp;&nbsp;&nbsp;F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;'a </a>T) -&gt; B,&nbsp;</span></code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.10.0'>1.10.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/slice/mod.rs.html#1322-1327' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Binary searches this sorted slice with a key extraction function.</p>
<p>Assumes that the slice is sorted by the key, for instance with
<a href="#method.sort_by_key"><code>sort_by_key</code></a> using the same key extraction function.</p>
<p>If a matching value is found then returns <code>Ok</code>, containing the
index for the matched element; if no match is found then <code>Err</code>
is returned, containing the index where a matching element could
be inserted while maintaining sorted order.</p>
<h1 id="examples-40" class="section-header"><a href="#examples-40">Examples</a></h1>
<p>Looks up a series of four elements in a slice of pairs sorted by
their second elements. The first is found, with a uniquely
determined position; the second and third are not found; the
fourth could match any position in <code>[1, 4]</code>.</p>
<pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="ident">s</span> <span class="op">=</span> [(<span class="number">0</span>, <span class="number">0</span>), (<span class="number">2</span>, <span class="number">1</span>), (<span class="number">4</span>, <span class="number">1</span>), (<span class="number">5</span>, <span class="number">1</span>), (<span class="number">3</span>, <span class="number">1</span>),
(<span class="number">1</span>, <span class="number">2</span>), (<span class="number">2</span>, <span class="number">3</span>), (<span class="number">4</span>, <span class="number">5</span>), (<span class="number">5</span>, <span class="number">8</span>), (<span class="number">3</span>, <span class="number">13</span>),
(<span class="number">1</span>, <span class="number">21</span>), (<span class="number">2</span>, <span class="number">34</span>), (<span class="number">4</span>, <span class="number">55</span>)];
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">s</span>.<span class="ident">binary_search_by_key</span>(<span class="kw-2">&amp;</span><span class="number">13</span>, <span class="op">|</span><span class="kw-2">&amp;</span>(<span class="ident">a</span>,<span class="ident">b</span>)<span class="op">|</span> <span class="ident">b</span>), <span class="prelude-val">Ok</span>(<span class="number">9</span>));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">s</span>.<span class="ident">binary_search_by_key</span>(<span class="kw-2">&amp;</span><span class="number">4</span>, <span class="op">|</span><span class="kw-2">&amp;</span>(<span class="ident">a</span>,<span class="ident">b</span>)<span class="op">|</span> <span class="ident">b</span>), <span class="prelude-val">Err</span>(<span class="number">7</span>));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">s</span>.<span class="ident">binary_search_by_key</span>(<span class="kw-2">&amp;</span><span class="number">100</span>, <span class="op">|</span><span class="kw-2">&amp;</span>(<span class="ident">a</span>,<span class="ident">b</span>)<span class="op">|</span> <span class="ident">b</span>), <span class="prelude-val">Err</span>(<span class="number">13</span>));
<span class="kw">let</span> <span class="ident">r</span> <span class="op">=</span> <span class="ident">s</span>.<span class="ident">binary_search_by_key</span>(<span class="kw-2">&amp;</span><span class="number">1</span>, <span class="op">|</span><span class="kw-2">&amp;</span>(<span class="ident">a</span>,<span class="ident">b</span>)<span class="op">|</span> <span class="ident">b</span>);
<span class="macro">assert</span><span class="macro">!</span>(<span class="kw">match</span> <span class="ident">r</span> { <span class="prelude-val">Ok</span>(<span class="number">1</span>...<span class="number">4</span>) <span class="op">=&gt;</span> <span class="bool-val">true</span>, <span class="kw">_</span> <span class="op">=&gt;</span> <span class="bool-val">false</span>, });</pre>
</div><h4 id='method.sort_unstable' class="method"><span id='sort_unstable.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.sort_unstable' class='fnname'>sort_unstable</a>(&amp;mut self) <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;T: <a class="trait" href="https://doc.rust-lang.org/nightly/core/cmp/trait.Ord.html" title="trait core::cmp::Ord">Ord</a>,&nbsp;</span></code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.20.0'>1.20.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/slice/mod.rs.html#1357-1361' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Sorts the slice, but may not preserve the order of equal elements.</p>
<p>This sort is unstable (i.e. may reorder equal elements), in-place (i.e. does not allocate),
and <code>O(n log n)</code> worst-case.</p>
<h1 id="current-implementation" class="section-header"><a href="#current-implementation">Current implementation</a></h1>
<p>The current algorithm is based on <a href="https://github.com/orlp/pdqsort">pattern-defeating quicksort</a> by Orson Peters,
which combines the fast average case of randomized quicksort with the fast worst case of
heapsort, while achieving linear time on slices with certain patterns. It uses some
randomization to avoid degenerate cases, but with a fixed seed to always provide
deterministic behavior.</p>
<p>It is typically faster than stable sorting, except in a few special cases, e.g. when the
slice consists of several concatenated sorted sequences.</p>
<h1 id="examples-41" class="section-header"><a href="#examples-41">Examples</a></h1>
<pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">v</span> <span class="op">=</span> [<span class="op">-</span><span class="number">5</span>, <span class="number">4</span>, <span class="number">1</span>, <span class="op">-</span><span class="number">3</span>, <span class="number">2</span>];
<span class="ident">v</span>.<span class="ident">sort_unstable</span>();
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">v</span> <span class="op">==</span> [<span class="op">-</span><span class="number">5</span>, <span class="op">-</span><span class="number">3</span>, <span class="number">1</span>, <span class="number">2</span>, <span class="number">4</span>]);</pre>
</div><h4 id='method.sort_unstable_by' class="method"><span id='sort_unstable_by.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.sort_unstable_by' class='fnname'>sort_unstable_by</a>&lt;F&gt;(&amp;mut self, compare: F) <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;</a>T, <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;</a>T) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/cmp/enum.Ordering.html" title="enum core::cmp::Ordering">Ordering</a>,&nbsp;</span></code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.20.0'>1.20.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/slice/mod.rs.html#1395-1399' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Sorts the slice with a comparator function, but may not preserve the order of equal
elements.</p>
<p>This sort is unstable (i.e. may reorder equal elements), in-place (i.e. does not allocate),
and <code>O(n log n)</code> worst-case.</p>
<h1 id="current-implementation-1" class="section-header"><a href="#current-implementation-1">Current implementation</a></h1>
<p>The current algorithm is based on <a href="https://github.com/orlp/pdqsort">pattern-defeating quicksort</a> by Orson Peters,
which combines the fast average case of randomized quicksort with the fast worst case of
heapsort, while achieving linear time on slices with certain patterns. It uses some
randomization to avoid degenerate cases, but with a fixed seed to always provide
deterministic behavior.</p>
<p>It is typically faster than stable sorting, except in a few special cases, e.g. when the
slice consists of several concatenated sorted sequences.</p>
<h1 id="examples-42" class="section-header"><a href="#examples-42">Examples</a></h1>
<pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">v</span> <span class="op">=</span> [<span class="number">5</span>, <span class="number">4</span>, <span class="number">1</span>, <span class="number">3</span>, <span class="number">2</span>];
<span class="ident">v</span>.<span class="ident">sort_unstable_by</span>(<span class="op">|</span><span class="ident">a</span>, <span class="ident">b</span><span class="op">|</span> <span class="ident">a</span>.<span class="ident">cmp</span>(<span class="ident">b</span>));
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">v</span> <span class="op">==</span> [<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>, <span class="number">4</span>, <span class="number">5</span>]);
<span class="comment">// reverse sorting</span>
<span class="ident">v</span>.<span class="ident">sort_unstable_by</span>(<span class="op">|</span><span class="ident">a</span>, <span class="ident">b</span><span class="op">|</span> <span class="ident">b</span>.<span class="ident">cmp</span>(<span class="ident">a</span>));
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">v</span> <span class="op">==</span> [<span class="number">5</span>, <span class="number">4</span>, <span class="number">3</span>, <span class="number">2</span>, <span class="number">1</span>]);</pre>
</div><h4 id='method.sort_unstable_by_key' class="method"><span id='sort_unstable_by_key.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.sort_unstable_by_key' class='fnname'>sort_unstable_by_key</a>&lt;K, F&gt;(&amp;mut self, f: F) <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;</a>T) -&gt; K,<br>&nbsp;&nbsp;&nbsp;&nbsp;K: <a class="trait" href="https://doc.rust-lang.org/nightly/core/cmp/trait.Ord.html" title="trait core::cmp::Ord">Ord</a>,&nbsp;</span></code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.20.0'>1.20.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/slice/mod.rs.html#1427-1431' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Sorts the slice with a key extraction function, but may not preserve the order of equal
elements.</p>
<p>This sort is unstable (i.e. may reorder equal elements), in-place (i.e. does not allocate),
and <code>O(m n log(m n))</code> worst-case, where the key function is <code>O(m)</code>.</p>
<h1 id="current-implementation-2" class="section-header"><a href="#current-implementation-2">Current implementation</a></h1>
<p>The current algorithm is based on <a href="https://github.com/orlp/pdqsort">pattern-defeating quicksort</a> by Orson Peters,
which combines the fast average case of randomized quicksort with the fast worst case of
heapsort, while achieving linear time on slices with certain patterns. It uses some
randomization to avoid degenerate cases, but with a fixed seed to always provide
deterministic behavior.</p>
<h1 id="examples-43" class="section-header"><a href="#examples-43">Examples</a></h1>
<pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">v</span> <span class="op">=</span> [<span class="op">-</span><span class="number">5i32</span>, <span class="number">4</span>, <span class="number">1</span>, <span class="op">-</span><span class="number">3</span>, <span class="number">2</span>];
<span class="ident">v</span>.<span class="ident">sort_unstable_by_key</span>(<span class="op">|</span><span class="ident">k</span><span class="op">|</span> <span class="ident">k</span>.<span class="ident">abs</span>());
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">v</span> <span class="op">==</span> [<span class="number">1</span>, <span class="number">2</span>, <span class="op">-</span><span class="number">3</span>, <span class="number">4</span>, <span class="op">-</span><span class="number">5</span>]);</pre>
</div><h4 id='method.rotate_left' class="method"><span id='rotate_left.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.rotate_left' class='fnname'>rotate_left</a>(&amp;mut self, mid: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>)</code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.26.0'>1.26.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/slice/mod.rs.html#1464-1472' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Rotates the slice in-place such that the first <code>mid</code> elements of the
slice move to the end while the last <code>self.len() - mid</code> elements move to
the front. After calling <code>rotate_left</code>, the element previously at index
<code>mid</code> will become the first element in the slice.</p>
<h1 id="panics-8" class="section-header"><a href="#panics-8">Panics</a></h1>
<p>This function will panic if <code>mid</code> is greater than the length of the
slice. Note that <code>mid == self.len()</code> does <em>not</em> panic and is a no-op
rotation.</p>
<h1 id="complexity" class="section-header"><a href="#complexity">Complexity</a></h1>
<p>Takes linear (in <code>self.len()</code>) time.</p>
<h1 id="examples-44" class="section-header"><a href="#examples-44">Examples</a></h1>
<pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">a</span> <span class="op">=</span> [<span class="string">&#39;a&#39;</span>, <span class="string">&#39;b&#39;</span>, <span class="string">&#39;c&#39;</span>, <span class="string">&#39;d&#39;</span>, <span class="string">&#39;e&#39;</span>, <span class="string">&#39;f&#39;</span>];
<span class="ident">a</span>.<span class="ident">rotate_left</span>(<span class="number">2</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">a</span>, [<span class="string">&#39;c&#39;</span>, <span class="string">&#39;d&#39;</span>, <span class="string">&#39;e&#39;</span>, <span class="string">&#39;f&#39;</span>, <span class="string">&#39;a&#39;</span>, <span class="string">&#39;b&#39;</span>]);</pre>
<p>Rotating a subslice:</p>
<pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">a</span> <span class="op">=</span> [<span class="string">&#39;a&#39;</span>, <span class="string">&#39;b&#39;</span>, <span class="string">&#39;c&#39;</span>, <span class="string">&#39;d&#39;</span>, <span class="string">&#39;e&#39;</span>, <span class="string">&#39;f&#39;</span>];
<span class="ident">a</span>[<span class="number">1</span>..<span class="number">5</span>].<span class="ident">rotate_left</span>(<span class="number">1</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">a</span>, [<span class="string">&#39;a&#39;</span>, <span class="string">&#39;c&#39;</span>, <span class="string">&#39;d&#39;</span>, <span class="string">&#39;e&#39;</span>, <span class="string">&#39;b&#39;</span>, <span class="string">&#39;f&#39;</span>]);</pre>
</div><h4 id='method.rotate_right' class="method"><span id='rotate_right.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.rotate_right' class='fnname'>rotate_right</a>(&amp;mut self, k: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>)</code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.26.0'>1.26.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/slice/mod.rs.html#1505-1513' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Rotates the slice in-place such that the first <code>self.len() - k</code>
elements of the slice move to the end while the last <code>k</code> elements move
to the front. After calling <code>rotate_right</code>, the element previously at
index <code>self.len() - k</code> will become the first element in the slice.</p>
<h1 id="panics-9" class="section-header"><a href="#panics-9">Panics</a></h1>
<p>This function will panic if <code>k</code> is greater than the length of the
slice. Note that <code>k == self.len()</code> does <em>not</em> panic and is a no-op
rotation.</p>
<h1 id="complexity-1" class="section-header"><a href="#complexity-1">Complexity</a></h1>
<p>Takes linear (in <code>self.len()</code>) time.</p>
<h1 id="examples-45" class="section-header"><a href="#examples-45">Examples</a></h1>
<pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">a</span> <span class="op">=</span> [<span class="string">&#39;a&#39;</span>, <span class="string">&#39;b&#39;</span>, <span class="string">&#39;c&#39;</span>, <span class="string">&#39;d&#39;</span>, <span class="string">&#39;e&#39;</span>, <span class="string">&#39;f&#39;</span>];
<span class="ident">a</span>.<span class="ident">rotate_right</span>(<span class="number">2</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">a</span>, [<span class="string">&#39;e&#39;</span>, <span class="string">&#39;f&#39;</span>, <span class="string">&#39;a&#39;</span>, <span class="string">&#39;b&#39;</span>, <span class="string">&#39;c&#39;</span>, <span class="string">&#39;d&#39;</span>]);</pre>
<p>Rotate a subslice:</p>
<pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">a</span> <span class="op">=</span> [<span class="string">&#39;a&#39;</span>, <span class="string">&#39;b&#39;</span>, <span class="string">&#39;c&#39;</span>, <span class="string">&#39;d&#39;</span>, <span class="string">&#39;e&#39;</span>, <span class="string">&#39;f&#39;</span>];
<span class="ident">a</span>[<span class="number">1</span>..<span class="number">5</span>].<span class="ident">rotate_right</span>(<span class="number">1</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">a</span>, [<span class="string">&#39;a&#39;</span>, <span class="string">&#39;e&#39;</span>, <span class="string">&#39;b&#39;</span>, <span class="string">&#39;c&#39;</span>, <span class="string">&#39;d&#39;</span>, <span class="string">&#39;f&#39;</span>]);</pre>
</div><h4 id='method.clone_from_slice' class="method"><span id='clone_from_slice.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.clone_from_slice' class='fnname'>clone_from_slice</a>(&amp;mut self, src: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&amp;[T]</a>) <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></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.7.0'>1.7.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/slice/mod.rs.html#1568-1580' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Copies the elements from <code>src</code> into <code>self</code>.</p>
<p>The length of <code>src</code> must be the same as <code>self</code>.</p>
<p>If <code>src</code> implements <code>Copy</code>, it can be more performant to use
<a href="#method.copy_from_slice"><code>copy_from_slice</code></a>.</p>
<h1 id="panics-10" class="section-header"><a href="#panics-10">Panics</a></h1>
<p>This function will panic if the two slices have different lengths.</p>
<h1 id="examples-46" class="section-header"><a href="#examples-46">Examples</a></h1>
<p>Cloning two elements from a slice into another:</p>
<pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="ident">src</span> <span class="op">=</span> [<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>, <span class="number">4</span>];
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">dst</span> <span class="op">=</span> [<span class="number">0</span>, <span class="number">0</span>];
<span class="ident">dst</span>.<span class="ident">clone_from_slice</span>(<span class="kw-2">&amp;</span><span class="ident">src</span>[<span class="number">2</span>..]);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">src</span>, [<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>, <span class="number">4</span>]);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">dst</span>, [<span class="number">3</span>, <span class="number">4</span>]);</pre>
<p>Rust enforces that there can only be one mutable reference with no
immutable references to a particular piece of data in a particular
scope. Because of this, attempting to use <code>clone_from_slice</code> on a
single slice will result in a compile failure:</p>
<div class='information'><div class='tooltip compile_fail'>ⓘ<span class='tooltiptext'>This example deliberately fails to compile</span></div></div><pre class="rust rust-example-rendered compile_fail">
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">slice</span> <span class="op">=</span> [<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>, <span class="number">4</span>, <span class="number">5</span>];
<span class="ident">slice</span>[..<span class="number">2</span>].<span class="ident">clone_from_slice</span>(<span class="kw-2">&amp;</span><span class="ident">slice</span>[<span class="number">3</span>..]); <span class="comment">// compile fail!</span></pre>
<p>To work around this, we can use <a href="#method.split_at_mut"><code>split_at_mut</code></a> to create two distinct
sub-slices from a slice:</p>
<pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">slice</span> <span class="op">=</span> [<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>, <span class="number">4</span>, <span class="number">5</span>];
{
<span class="kw">let</span> (<span class="ident">left</span>, <span class="ident">right</span>) <span class="op">=</span> <span class="ident">slice</span>.<span class="ident">split_at_mut</span>(<span class="number">2</span>);
<span class="ident">left</span>.<span class="ident">clone_from_slice</span>(<span class="kw-2">&amp;</span><span class="ident">right</span>[<span class="number">1</span>..]);
}
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">slice</span>, [<span class="number">4</span>, <span class="number">5</span>, <span class="number">3</span>, <span class="number">4</span>, <span class="number">5</span>]);</pre>
</div><h4 id='method.copy_from_slice' class="method"><span id='copy_from_slice.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.copy_from_slice' class='fnname'>copy_from_slice</a>(&amp;mut self, src: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&amp;[T]</a>) <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.Copy.html" title="trait core::marker::Copy">Copy</a>,&nbsp;</span></code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.9.0'>1.9.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/slice/mod.rs.html#1634-1641' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Copies all elements from <code>src</code> into <code>self</code>, using a memcpy.</p>
<p>The length of <code>src</code> must be the same as <code>self</code>.</p>
<p>If <code>src</code> does not implement <code>Copy</code>, use <a href="#method.clone_from_slice"><code>clone_from_slice</code></a>.</p>
<h1 id="panics-11" class="section-header"><a href="#panics-11">Panics</a></h1>
<p>This function will panic if the two slices have different lengths.</p>
<h1 id="examples-47" class="section-header"><a href="#examples-47">Examples</a></h1>
<p>Copying two elements from a slice into another:</p>
<pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="ident">src</span> <span class="op">=</span> [<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>, <span class="number">4</span>];
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">dst</span> <span class="op">=</span> [<span class="number">0</span>, <span class="number">0</span>];
<span class="ident">dst</span>.<span class="ident">copy_from_slice</span>(<span class="kw-2">&amp;</span><span class="ident">src</span>[<span class="number">2</span>..]);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">src</span>, [<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>, <span class="number">4</span>]);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">dst</span>, [<span class="number">3</span>, <span class="number">4</span>]);</pre>
<p>Rust enforces that there can only be one mutable reference with no
immutable references to a particular piece of data in a particular
scope. Because of this, attempting to use <code>copy_from_slice</code> on a
single slice will result in a compile failure:</p>
<div class='information'><div class='tooltip compile_fail'>ⓘ<span class='tooltiptext'>This example deliberately fails to compile</span></div></div><pre class="rust rust-example-rendered compile_fail">
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">slice</span> <span class="op">=</span> [<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>, <span class="number">4</span>, <span class="number">5</span>];
<span class="ident">slice</span>[..<span class="number">2</span>].<span class="ident">copy_from_slice</span>(<span class="kw-2">&amp;</span><span class="ident">slice</span>[<span class="number">3</span>..]); <span class="comment">// compile fail!</span></pre>
<p>To work around this, we can use <a href="#method.split_at_mut"><code>split_at_mut</code></a> to create two distinct
sub-slices from a slice:</p>
<pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">slice</span> <span class="op">=</span> [<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>, <span class="number">4</span>, <span class="number">5</span>];
{
<span class="kw">let</span> (<span class="ident">left</span>, <span class="ident">right</span>) <span class="op">=</span> <span class="ident">slice</span>.<span class="ident">split_at_mut</span>(<span class="number">2</span>);
<span class="ident">left</span>.<span class="ident">copy_from_slice</span>(<span class="kw-2">&amp;</span><span class="ident">right</span>[<span class="number">1</span>..]);
}
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">slice</span>, [<span class="number">4</span>, <span class="number">5</span>, <span class="number">3</span>, <span class="number">4</span>, <span class="number">5</span>]);</pre>
</div><h4 id='method.swap_with_slice' class="method"><span id='swap_with_slice.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.swap_with_slice' class='fnname'>swap_with_slice</a>(&amp;mut self, other: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&amp;mut [T]</a>)</code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.27.0'>1.27.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/slice/mod.rs.html#1691-1698' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Swaps all elements in <code>self</code> with those in <code>other</code>.</p>
<p>The length of <code>other</code> must be the same as <code>self</code>.</p>
<h1 id="panics-12" class="section-header"><a href="#panics-12">Panics</a></h1>
<p>This function will panic if the two slices have different lengths.</p>
<h1 id="example-3" class="section-header"><a href="#example-3">Example</a></h1>
<p>Swapping two elements across slices:</p>
<pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">slice1</span> <span class="op">=</span> [<span class="number">0</span>, <span class="number">0</span>];
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">slice2</span> <span class="op">=</span> [<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>, <span class="number">4</span>];
<span class="ident">slice1</span>.<span class="ident">swap_with_slice</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">slice2</span>[<span class="number">2</span>..]);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">slice1</span>, [<span class="number">3</span>, <span class="number">4</span>]);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">slice2</span>, [<span class="number">1</span>, <span class="number">2</span>, <span class="number">0</span>, <span class="number">0</span>]);</pre>
<p>Rust enforces that there can only be one mutable reference to a
particular piece of data in a particular scope. Because of this,
attempting to use <code>swap_with_slice</code> on a single slice will result in
a compile failure:</p>
<div class='information'><div class='tooltip compile_fail'>ⓘ<span class='tooltiptext'>This example deliberately fails to compile</span></div></div><pre class="rust rust-example-rendered compile_fail">
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">slice</span> <span class="op">=</span> [<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>, <span class="number">4</span>, <span class="number">5</span>];
<span class="ident">slice</span>[..<span class="number">2</span>].<span class="ident">swap_with_slice</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">slice</span>[<span class="number">3</span>..]); <span class="comment">// compile fail!</span></pre>
<p>To work around this, we can use <a href="#method.split_at_mut"><code>split_at_mut</code></a> to create two distinct
mutable sub-slices from a slice:</p>
<pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">slice</span> <span class="op">=</span> [<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>, <span class="number">4</span>, <span class="number">5</span>];
{
<span class="kw">let</span> (<span class="ident">left</span>, <span class="ident">right</span>) <span class="op">=</span> <span class="ident">slice</span>.<span class="ident">split_at_mut</span>(<span class="number">2</span>);
<span class="ident">left</span>.<span class="ident">swap_with_slice</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">right</span>[<span class="number">1</span>..]);
}
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">slice</span>, [<span class="number">4</span>, <span class="number">5</span>, <span class="number">3</span>, <span class="number">1</span>, <span class="number">2</span>]);</pre>
</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-Deref' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/deref/trait.Deref.html" title="trait core::ops::deref::Deref">Deref</a> for <a class="struct" href="../memmap/struct.MmapMut.html" title="struct memmap::MmapMut">MmapMut</a></code><a href='#impl-Deref' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/memmap/lib.rs.html#604-611' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'><h4 id='associatedtype.Target' class="type"><span id='Target.t' class='invisible'><code>type <a href='https://doc.rust-lang.org/nightly/core/ops/deref/trait.Deref.html#associatedtype.Target' class="type">Target</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.u8.html">u8</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a></code></span></h4>
<div class='docblock'><p>The resulting type after dereferencing.</p>
</div><h4 id='method.deref' class="method"><span id='deref.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='https://doc.rust-lang.org/nightly/core/ops/deref/trait.Deref.html#tymethod.deref' class='fnname'>deref</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&amp;[</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></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/memmap/lib.rs.html#608-610' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Dereferences the value.</p>
</div></div><h3 id='impl-DerefMut' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/deref/trait.DerefMut.html" title="trait core::ops::deref::DerefMut">DerefMut</a> for <a class="struct" href="../memmap/struct.MmapMut.html" title="struct memmap::MmapMut">MmapMut</a></code><a href='#impl-DerefMut' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/memmap/lib.rs.html#613-618' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'><h4 id='method.deref_mut' class="method"><span id='deref_mut.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='https://doc.rust-lang.org/nightly/core/ops/deref/trait.DerefMut.html#tymethod.deref_mut' class='fnname'>deref_mut</a>(&amp;mut self) -&gt; <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></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/memmap/lib.rs.html#615-617' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Mutably dereferences the value.</p>
</div></div><h3 id='impl-AsRef%3C%5Bu8%5D%3E' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl <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.u8.html">u8</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>&gt; for <a class="struct" href="../memmap/struct.MmapMut.html" title="struct memmap::MmapMut">MmapMut</a></code><a href='#impl-AsRef%3C%5Bu8%5D%3E' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/memmap/lib.rs.html#620-625' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'><h4 id='method.as_ref' class="method"><span id='as_ref.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='https://doc.rust-lang.org/nightly/core/convert/trait.AsRef.html#tymethod.as_ref' class='fnname'>as_ref</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&amp;[</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></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/memmap/lib.rs.html#622-624' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Performs the conversion.</p>
</div></div><h3 id='impl-AsMut%3C%5Bu8%5D%3E' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl <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.u8.html">u8</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>&gt; for <a class="struct" href="../memmap/struct.MmapMut.html" title="struct memmap::MmapMut">MmapMut</a></code><a href='#impl-AsMut%3C%5Bu8%5D%3E' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/memmap/lib.rs.html#627-632' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'><h4 id='method.as_mut' class="method"><span id='as_mut.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='https://doc.rust-lang.org/nightly/core/convert/trait.AsMut.html#tymethod.as_mut' class='fnname'>as_mut</a>(&amp;mut self) -&gt; <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></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/memmap/lib.rs.html#629-631' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Performs the conversion.</p>
</div></div><h3 id='impl-Debug' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl <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="../memmap/struct.MmapMut.html" title="struct memmap::MmapMut">MmapMut</a></code><a href='#impl-Debug' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/memmap/lib.rs.html#634-641' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'><h4 id='method.fmt' class="method"><span id='fmt.v' class='invisible'><table class='table-display'><tbody><tr><td><code>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="type" href="https://doc.rust-lang.org/nightly/core/fmt/type.Result.html" title="type core::fmt::Result">Result</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/memmap/lib.rs.html#635-640' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><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></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-Send' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl <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="../memmap/struct.MmapMut.html" title="struct memmap::MmapMut">MmapMut</a></code><a href='#impl-Send' class='anchor'></a></span></td><td><span class='out-of-band'></span></td></tr></tbody></table></h3><div class='impl-items'></div><h3 id='impl-Sync' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl <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="../memmap/struct.MmapMut.html" title="struct memmap::MmapMut">MmapMut</a></code><a href='#impl-Sync' class='anchor'></a></span></td><td><span class='out-of-band'></span></td></tr></tbody></table></h3><div class='impl-items'></div></div></section><section id="search" class="content hidden"></section><section class="footer"></section><aside id="help" class="hidden"><div><h1 class="hidden">Help</h1><div class="shortcuts"><h2>Keyboard Shortcuts</h2><dl><dt><kbd>?</kbd></dt><dd>Show this help dialog</dd><dt><kbd>S</kbd></dt><dd>Focus the search field</dd><dt><kbd>↑</kbd></dt><dd>Move up in search results</dd><dt><kbd>↓</kbd></dt><dd>Move down in search results</dd><dt><kbd>↹</kbd></dt><dd>Switch tab</dd><dt><kbd>&#9166;</kbd></dt><dd>Go to active search result</dd><dt><kbd>+</kbd></dt><dd>Expand all sections</dd><dt><kbd>-</kbd></dt><dd>Collapse all sections</dd></dl></div><div class="infos"><h2>Search Tricks</h2><p>Prefix searches with a type followed by a colon (e.g. <code>fn:</code>) to restrict the search to a given type.</p><p>Accepted types are: <code>fn</code>, <code>mod</code>, <code>struct</code>, <code>enum</code>, <code>trait</code>, <code>type</code>, <code>macro</code>, and <code>const</code>.</p><p>Search functions by type signature (e.g. <code>vec -> usize</code> or <code>* -> vec</code>)</p><p>Search multiple things at once by splitting your query with comma (e.g. <code>str,u8</code> or <code>String,struct:Vec,test</code>)</p></div></div></aside><script>window.rootPath = "../";window.currentCrate = "memmap";</script><script src="../aliases.js"></script><script src="../main.js"></script><script defer src="../search-index.js"></script></body></html>
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