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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="A “history buffer”, similar to a write-only ring buffer of fixed length."><title>HistoryBuffer in heapless - Rust</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-46f98efaafac5295.ttf.woff2,FiraSans-Regular-018c141bf0843ffd.woff2,FiraSans-Medium-8f9a781e4970d388.woff2,SourceCodePro-Regular-562dcc5011b6de7d.ttf.woff2,SourceCodePro-Semibold-d899c5a5c4aeb14a.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2" crossorigin href="../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../static.files/normalize-76eba96aa4d2e634.css"><link rel="stylesheet" href="../static.files/rustdoc-b0742ba02757f159.css"><meta name="rustdoc-vars" data-root-path="../" data-static-root-path="../static.files/" data-current-crate="heapless" data-themes="" data-resource-suffix="" data-rustdoc-version="1.83.0 (90b35a623 2024-11-26)" data-channel="1.83.0" data-search-js="search-f0d225181b97f9a4.js" data-settings-js="settings-805db61a62df4bd2.js" ><script src="../static.files/storage-1d39b6787ed640ff.js"></script><script defer src="sidebar-items.js"></script><script defer src="../static.files/main-f070b9041d14864c.js"></script><noscript><link rel="stylesheet" href="../static.files/noscript-0111fcff984fae8f.css"></noscript><link rel="alternate icon" type="image/png" href="../static.files/favicon-32x32-422f7d1d52889060.png"><link rel="icon" type="image/svg+xml" href="../static.files/favicon-2c020d218678b618.svg"></head><body class="rustdoc struct"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="mobile-topbar"><button class="sidebar-menu-toggle" title="show sidebar"></button></nav><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../heapless/index.html">heapless</a><span class="version">0.8.0</span></h2></div><div class="sidebar-elems"><section id="rustdoc-toc"><h2 class="location"><a href="#">History<wbr>Buffer</a></h2><h3><a href="#">Sections</a></h3><ul class="block top-toc"><li><a href="#examples" title="Examples">Examples</a></li></ul><h3><a href="#implementations">Methods</a></h3><ul class="block method"><li><a href="#method.as_slice" title="as_slice">as_slice</a></li><li><a href="#method.as_slices" title="as_slices">as_slices</a></li><li><a href="#method.capacity" title="capacity">capacity</a></li><li><a href="#method.clear" title="clear">clear</a></li><li><a href="#method.clear_with" title="clear_with">clear_with</a></li><li><a href="#method.extend_from_slice" title="extend_from_slice">extend_from_slice</a></li><li><a href="#method.len" title="len">len</a></li><li><a href="#method.new" title="new">new</a></li><li><a href="#method.new_with" title="new_with">new_with</a></li><li><a href="#method.oldest_ordered" title="oldest_ordered">oldest_ordered</a></li><li><a href="#method.recent" title="recent">recent</a></li><li><a href="#method.write" title="write">write</a></li></ul><h3><a href="#deref-methods-%5BT%5D">Methods from Deref&lt;<wbr>Target=[<wbr>T]&gt;</a></h3><ul class="block deref-methods"><li><a href="#method.align_to" title="align_to">align_to</a></li><li><a href="#method.array_chunks" title="array_chunks">array_chunks</a></li><li><a href="#method.array_windows" title="array_windows">array_windows</a></li><li><a href="#method.as_ascii" title="as_ascii">as_ascii</a></li><li><a href="#method.as_ascii_unchecked" title="as_ascii_unchecked">as_ascii_unchecked</a></li><li><a href="#method.as_bytes" title="as_bytes">as_bytes</a></li><li><a href="#method.as_chunks" title="as_chunks">as_chunks</a></li><li><a href="#method.as_chunks_unchecked" title="as_chunks_unchecked">as_chunks_unchecked</a></li><li><a href="#method.as_flattened" title="as_flattened">as_flattened</a></li><li><a href="#method.as_ptr" title="as_ptr">as_ptr</a></li><li><a href="#method.as_ptr_range" title="as_ptr_range">as_ptr_range</a></li><li><a href="#method.as_rchunks" title="as_rchunks">as_rchunks</a></li><li><a href="#method.as_simd" title="as_simd">as_simd</a></li><li><a href="#method.as_str" title="as_str">as_str</a></li><li><a href="#method.binary_search" title="binary_search">binary_search</a></li><li><a href="#method.binary_search_by" title="binary_search_by">binary_search_by</a></li><li><a href="#method.binary_search_by_key" title="binary_search_by_key">binary_search_by_key</a></li><li><a href="#method.chunk_by" title="chunk_by">chunk_by</a></li><li><a href="#method.chunks" title="chunks">chunks</a></li><li><a href="#method.chunks_exact" title="chunks_exact">chunks_exact</a></li><li><a href="#method.contains" title="contains">contains</a></li><li><a href="#method.elem_offset" title="elem_offset">elem_offset</a></li><li><a href="#method.ends_with" title="ends_with">ends_with</a></li><li><a href="#method.eq_ignore_ascii_case" title="eq_ignore_ascii_case">eq_ignore_ascii_case</a></li><li><a href="#method.escape_ascii" title="escape_ascii">escape_ascii</a></li><li><a href="#method.first" title="first">first</a></li><li><a href="#method.first_chunk" title="first_chunk">first_chunk</a></li><li><a href="#method.get" title="get">get</a></li><li><a href="#method.get_unchecked" title="get_unchecked">get_unchecked</a></li><li><a href="#method.is_ascii" title="is_ascii">is_ascii</a></li><li><a href="#method.is_empty" title="is_empty">is_empty</a></li><li><a href="#method.is_sorted" title="is_sorted">is_sorted</a></li><li><a href="#method.is_sorted_by" title="is_sorted_by">is_sorted_by</a></li><li><a href="#method.is_sorted_by_key" title="is_sorted_by_key">is_sorted_by_key</a></li><li><a href="#method.iter" title="iter">iter</a></li><li><a href="#method.last" title="last">last</a></li><li><a href="#method.last_chunk" title="last_chunk">last_chunk</a></li><li><a href="#method.len-1" title="len">len</a></li><li><a href="#method.partition_point" title="partition_point">partition_point</a></li><li><a href="#method.rchunks" title="rchunks">rchunks</a></li><li><a href="#method.rchunks_exact" title="rchunks_exact">rchunks_exact</a></li><li><a href="#method.rsplit" title="rsplit">rsplit</a></li><li><a href="#method.rsplit_once" title="rsplit_once">rsplit_once</a></li><li><a href="#method.rsplitn" title="rsplitn">rsplitn</a></li><li><a href="#method.split" title="split">split</a></li><li><a href="#method.split_at" title="split_at">split_at</a></li><li><a href="#method.split_at_checked" title="split_at_checked">split_at_checked</a></li><li><a href="#method.split_at_unchecked" title="split_at_unchecked">split_at_unchecked</a></li><li><a href="#method.split_first" title="split_first">split_first</a></li><li><a href="#method.split_first_chunk" title="split_first_chunk">split_first_chunk</a></li><li><a href="#method.split_inclusive" title="split_inclusive">split_inclusive</a></li><li><a href="#method.split_last" title="split_last">split_last</a></li><li><a href="#method.split_last_chunk" title="split_last_chunk">split_last_chunk</a></li><li><a href="#method.split_once" title="split_once">split_once</a></li><li><a href="#method.splitn" title="splitn">splitn</a></li><li><a href="#method.starts_with" title="starts_with">starts_with</a></li><li><a href="#method.strip_prefix" title="strip_prefix">strip_prefix</a></li><li><a href="#method.strip_suffix" title="strip_suffix">strip_suffix</a></li><li><a href="#method.subslice_range" title="subslice_range">subslice_range</a></li><li><a href="#method.trim_ascii" title="trim_ascii">trim_ascii</a></li><li><a href="#method.trim_ascii_end" title="trim_ascii_end">trim_ascii_end</a></li><li><a href="#method.trim_ascii_start" title="trim_ascii_start">trim_ascii_start</a></li><li><a href="#method.utf8_chunks" title="utf8_chunks">utf8_chunks</a></li><li><a href="#method.windows" title="windows">windows</a></li></ul><h3><a href="#trait-implementations">Trait Implementations</a></h3><ul class="block trait-implementation"><li><a href="#impl-AsRef%3C%5BT%5D%3E-for-HistoryBuffer%3CT,+N%3E" title="AsRef&#60;[T]&#62;">AsRef&#60;[T]&#62;</a></li><li><a href="#impl-Clone-for-HistoryBuffer%3CT,+N%3E" title="Clone">Clone</a></li><li><a href="#impl-Debug-for-HistoryBuffer%3CT,+N%3E" title="Debug">Debug</a></li><li><a href="#impl-Default-for-HistoryBuffer%3CT,+N%3E" title="Default">Default</a></li><li><a href="#impl-Deref-for-HistoryBuffer%3CT,+N%3E" title="Deref">Deref</a></li><li><a href="#impl-Drop-for-HistoryBuffer%3CT,+N%3E" title="Drop">Drop</a></li><li><a href="#impl-Extend%3C%26T%3E-for-HistoryBuffer%3CT,+N%3E" title="Extend&#60;&#38;&#39;a T&#62;">Extend&#60;&#38;&#39;a T&#62;</a></li><li><a href="#impl-Extend%3CT%3E-for-HistoryBuffer%3CT,+N%3E" title="Extend&#60;T&#62;">Extend&#60;T&#62;</a></li><li><a href="#impl-PartialEq-for-HistoryBuffer%3CT,+N%3E" title="PartialEq">PartialEq</a></li></ul><h3><a href="#synthetic-implementations">Auto Trait Implementations</a></h3><ul class="block synthetic-implementation"><li><a href="#impl-Freeze-for-HistoryBuffer%3CT,+N%3E" title="Freeze">Freeze</a></li><li><a href="#impl-RefUnwindSafe-for-HistoryBuffer%3CT,+N%3E" title="RefUnwindSafe">RefUnwindSafe</a></li><li><a href="#impl-Send-for-HistoryBuffer%3CT,+N%3E" title="Send">Send</a></li><li><a href="#impl-Sync-for-HistoryBuffer%3CT,+N%3E" title="Sync">Sync</a></li><li><a href="#impl-Unpin-for-HistoryBuffer%3CT,+N%3E" title="Unpin">Unpin</a></li><li><a href="#impl-UnwindSafe-for-HistoryBuffer%3CT,+N%3E" title="UnwindSafe">UnwindSafe</a></li></ul><h3><a href="#blanket-implementations">Blanket Implementations</a></h3><ul class="block blanket-implementation"><li><a href="#impl-Any-for-T" title="Any">Any</a></li><li><a href="#impl-Borrow%3CT%3E-for-T" title="Borrow&#60;T&#62;">Borrow&#60;T&#62;</a></li><li><a href="#impl-BorrowMut%3CT%3E-for-T" title="BorrowMut&#60;T&#62;">BorrowMut&#60;T&#62;</a></li><li><a href="#impl-CloneToUninit-for-T" title="CloneToUninit">CloneToUninit</a></li><li><a href="#impl-From%3CT%3E-for-T" title="From&#60;T&#62;">From&#60;T&#62;</a></li><li><a href="#impl-Into%3CU%3E-for-T" title="Into&#60;U&#62;">Into&#60;U&#62;</a></li><li><a href="#impl-TryFrom%3CU%3E-for-T" title="TryFrom&#60;U&#62;">TryFrom&#60;U&#62;</a></li><li><a href="#impl-TryInto%3CU%3E-for-T" title="TryInto&#60;U&#62;">TryInto&#60;U&#62;</a></li></ul></section><div id="rustdoc-modnav"><h2 class="in-crate"><a href="index.html">In crate heapless</a></h2></div></div></nav><div class="sidebar-resizer"></div><main><div class="width-limiter"><rustdoc-search></rustdoc-search><section id="main-content" class="content"><div class="main-heading"><span class="rustdoc-breadcrumbs"><a href="index.html">heapless</a></span><h1>Struct <span class="struct">HistoryBuffer</span><button id="copy-path" title="Copy item path to clipboard">Copy item path</button></h1><rustdoc-toolbar></rustdoc-toolbar><span class="sub-heading"><a class="src" href="../src/heapless/histbuf.rs.html#37-41">source</a> </span></div><pre class="rust item-decl"><code>pub struct HistoryBuffer&lt;T, const N: <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.usize.html">usize</a>&gt; { <span class="comment">/* private fields */</span> }</code></pre><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>A “history buffer”, similar to a write-only ring buffer of fixed length.</p>
<p>This buffer keeps a fixed number of elements. On write, the oldest element
is overwritten. Thus, the buffer is useful to keep a history of values with
some desired depth, and for example calculate a rolling average.</p>
<h2 id="examples"><a class="doc-anchor" href="#examples">§</a>Examples</h2>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>heapless::HistoryBuffer;
<span class="comment">// Initialize a new buffer with 8 elements.
</span><span class="kw">let </span><span class="kw-2">mut </span>buf = HistoryBuffer::&lt;<span class="kw">_</span>, <span class="number">8</span>&gt;::new();
<span class="comment">// Starts with no data
</span><span class="macro">assert_eq!</span>(buf.recent(), <span class="prelude-val">None</span>);
buf.write(<span class="number">3</span>);
buf.write(<span class="number">5</span>);
buf.extend(<span class="kw-2">&amp;</span>[<span class="number">4</span>, <span class="number">4</span>]);
<span class="comment">// The most recent written element is a four.
</span><span class="macro">assert_eq!</span>(buf.recent(), <span class="prelude-val">Some</span>(<span class="kw-2">&amp;</span><span class="number">4</span>));
<span class="comment">// To access all elements in an unspecified order, use `as_slice()`.
</span><span class="kw">for </span>el <span class="kw">in </span>buf.as_slice() { <span class="macro">println!</span>(<span class="string">"{:?}"</span>, el); }
<span class="comment">// Now we can prepare an average of all values, which comes out to 4.
</span><span class="kw">let </span>avg = buf.as_slice().iter().sum::&lt;usize&gt;() / buf.len();
<span class="macro">assert_eq!</span>(avg, <span class="number">4</span>);</code></pre></div>
</div></details><h2 id="implementations" class="section-header">Implementations<a href="#implementations" class="anchor">§</a></h2><div id="implementations-list"><details class="toggle implementors-toggle" open><summary><section id="impl-HistoryBuffer%3CT,+N%3E" class="impl"><a class="src rightside" href="../src/heapless/histbuf.rs.html#43-76">source</a><a href="#impl-HistoryBuffer%3CT,+N%3E" class="anchor">§</a><h3 class="code-header">impl&lt;T, const N: <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.usize.html">usize</a>&gt; <a class="struct" href="struct.HistoryBuffer.html" title="struct heapless::HistoryBuffer">HistoryBuffer</a>&lt;T, N&gt;</h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.new" class="method"><a class="src rightside" href="../src/heapless/histbuf.rs.html#60-69">source</a><h4 class="code-header">pub const fn <a href="#method.new" class="fn">new</a>() -&gt; Self</h4></section></summary><div class="docblock"><p>Constructs a new history buffer.</p>
<p>The construction of a <code>HistoryBuffer</code> works in <code>const</code> contexts.</p>
<h5 id="examples-1"><a class="doc-anchor" href="#examples-1">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>heapless::HistoryBuffer;
<span class="comment">// Allocate a 16-element buffer on the stack
</span><span class="kw">let </span>x: HistoryBuffer&lt;u8, <span class="number">16</span>&gt; = HistoryBuffer::new();
<span class="macro">assert_eq!</span>(x.len(), <span class="number">0</span>);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.clear" class="method"><a class="src rightside" href="../src/heapless/histbuf.rs.html#73-75">source</a><h4 class="code-header">pub fn <a href="#method.clear" class="fn">clear</a>(&amp;mut self)</h4></section></summary><div class="docblock"><p>Clears the buffer, replacing every element with the default value of
type <code>T</code>.</p>
</div></details></div></details><details class="toggle implementors-toggle" open><summary><section id="impl-HistoryBuffer%3CT,+N%3E-1" class="impl"><a class="src rightside" href="../src/heapless/histbuf.rs.html#78-107">source</a><a href="#impl-HistoryBuffer%3CT,+N%3E-1" class="anchor">§</a><h3 class="code-header">impl&lt;T, const N: <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.usize.html">usize</a>&gt; <a class="struct" href="struct.HistoryBuffer.html" title="struct heapless::HistoryBuffer">HistoryBuffer</a>&lt;T, N&gt;<div class="where">where
T: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/marker/trait.Copy.html" title="trait core::marker::Copy">Copy</a> + <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.new_with" class="method"><a class="src rightside" href="../src/heapless/histbuf.rs.html#95-101">source</a><h4 class="code-header">pub fn <a href="#method.new_with" class="fn">new_with</a>(t: T) -&gt; Self</h4></section></summary><div class="docblock"><p>Constructs a new history buffer, where every element is the given value.</p>
<h5 id="examples-2"><a class="doc-anchor" href="#examples-2">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>heapless::HistoryBuffer;
<span class="comment">// Allocate a 16-element buffer on the stack
</span><span class="kw">let </span><span class="kw-2">mut </span>x: HistoryBuffer&lt;u8, <span class="number">16</span>&gt; = HistoryBuffer::new_with(<span class="number">4</span>);
<span class="comment">// All elements are four
</span><span class="macro">assert_eq!</span>(x.as_slice(), [<span class="number">4</span>; <span class="number">16</span>]);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.clear_with" class="method"><a class="src rightside" href="../src/heapless/histbuf.rs.html#104-106">source</a><h4 class="code-header">pub fn <a href="#method.clear_with" class="fn">clear_with</a>(&amp;mut self, t: T)</h4></section></summary><div class="docblock"><p>Clears the buffer, replacing every element with the given value.</p>
</div></details></div></details><details class="toggle implementors-toggle" open><summary><section id="impl-HistoryBuffer%3CT,+N%3E-2" class="impl"><a class="src rightside" href="../src/heapless/histbuf.rs.html#109-238">source</a><a href="#impl-HistoryBuffer%3CT,+N%3E-2" class="anchor">§</a><h3 class="code-header">impl&lt;T, const N: <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.usize.html">usize</a>&gt; <a class="struct" href="struct.HistoryBuffer.html" title="struct heapless::HistoryBuffer">HistoryBuffer</a>&lt;T, N&gt;</h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.len" class="method"><a class="src rightside" href="../src/heapless/histbuf.rs.html#112-118">source</a><h4 class="code-header">pub fn <a href="#method.len" class="fn">len</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.usize.html">usize</a></h4></section></summary><div class="docblock"><p>Returns the current fill level of the buffer.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.capacity" class="method"><a class="src rightside" href="../src/heapless/histbuf.rs.html#123-125">source</a><h4 class="code-header">pub fn <a href="#method.capacity" class="fn">capacity</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.usize.html">usize</a></h4></section></summary><div class="docblock"><p>Returns the capacity of the buffer, which is the length of the
underlying backing array.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.write" class="method"><a class="src rightside" href="../src/heapless/histbuf.rs.html#128-140">source</a><h4 class="code-header">pub fn <a href="#method.write" class="fn">write</a>(&amp;mut self, t: T)</h4></section></summary><div class="docblock"><p>Writes an element to the buffer, overwriting the oldest value.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.extend_from_slice" class="method"><a class="src rightside" href="../src/heapless/histbuf.rs.html#146-153">source</a><h4 class="code-header">pub fn <a href="#method.extend_from_slice" class="fn">extend_from_slice</a>(&amp;mut self, other: &amp;<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html">[T]</a>)<div class="where">where
T: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a>,</div></h4></section></summary><div class="docblock"><p>Clones and writes all elements in a slice to the buffer.</p>
<p>If the slice is longer than the buffer, only the last <code>self.len()</code>
elements will actually be stored.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.recent" class="method"><a class="src rightside" href="../src/heapless/histbuf.rs.html#167-177">source</a><h4 class="code-header">pub fn <a href="#method.recent" class="fn">recent</a>(&amp;self) -&gt; <a class="enum" href="https://doc.rust-lang.org/1.83.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.reference.html">&amp;T</a>&gt;</h4></section></summary><div class="docblock"><p>Returns a reference to the most recently written value.</p>
<h5 id="examples-3"><a class="doc-anchor" href="#examples-3">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>heapless::HistoryBuffer;
<span class="kw">let </span><span class="kw-2">mut </span>x: HistoryBuffer&lt;u8, <span class="number">16</span>&gt; = HistoryBuffer::new();
x.write(<span class="number">4</span>);
x.write(<span class="number">10</span>);
<span class="macro">assert_eq!</span>(x.recent(), <span class="prelude-val">Some</span>(<span class="kw-2">&amp;</span><span class="number">10</span>));</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.as_slice" class="method"><a class="src rightside" href="../src/heapless/histbuf.rs.html#181-183">source</a><h4 class="code-header">pub fn <a href="#method.as_slice" class="fn">as_slice</a>(&amp;self) -&gt; &amp;<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html">[T]</a></h4></section></summary><div class="docblock"><p>Returns the array slice backing the buffer, without keeping track
of the write position. Therefore, the element order is unspecified.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.as_slices" class="method"><a class="src rightside" href="../src/heapless/histbuf.rs.html#197-205">source</a><h4 class="code-header">pub fn <a href="#method.as_slices" class="fn">as_slices</a>(&amp;self) -&gt; (&amp;<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html">[T]</a>, &amp;<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html">[T]</a>)</h4></section></summary><div class="docblock"><p>Returns a pair of slices which contain, in order, the contents of the buffer.</p>
<h5 id="examples-4"><a class="doc-anchor" href="#examples-4">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>heapless::HistoryBuffer;
<span class="kw">let </span><span class="kw-2">mut </span>buffer: HistoryBuffer&lt;u8, <span class="number">6</span>&gt; = HistoryBuffer::new();
buffer.extend([<span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>]);
buffer.extend([<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_eq!</span>(buffer.as_slices(), (<span class="kw-2">&amp;</span>[<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>][..], <span class="kw-2">&amp;</span>[<span class="number">4</span>, <span class="number">5</span>, <span class="number">6</span>][..]));</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.oldest_ordered" class="method"><a class="src rightside" href="../src/heapless/histbuf.rs.html#222-237">source</a><h4 class="code-header">pub fn <a href="#method.oldest_ordered" class="fn">oldest_ordered</a>&lt;'a&gt;(&amp;'a self) -&gt; <a class="struct" href="struct.OldestOrdered.html" title="struct heapless::OldestOrdered">OldestOrdered</a>&lt;'a, T, N&gt; <a href="#" class="tooltip" data-notable-ty="OldestOrdered&lt;&#39;a, T, N&gt;">ⓘ</a></h4></section></summary><div class="docblock"><p>Returns an iterator for iterating over the buffer from oldest to newest.</p>
<h5 id="examples-5"><a class="doc-anchor" href="#examples-5">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>heapless::HistoryBuffer;
<span class="kw">let </span><span class="kw-2">mut </span>buffer: HistoryBuffer&lt;u8, <span class="number">6</span>&gt; = HistoryBuffer::new();
buffer.extend([<span class="number">0</span>, <span class="number">0</span>, <span class="number">0</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>expected = [<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">for </span>(x, y) <span class="kw">in </span>buffer.oldest_ordered().zip(expected.iter()) {
<span class="macro">assert_eq!</span>(x, y)
}
</code></pre></div>
</div></details></div></details></div><details class="toggle big-toggle" open><summary><h2 id="deref-methods-%5BT%5D" class="section-header"><span>Methods from <a class="trait" href="https://doc.rust-lang.org/1.83.0/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/1.83.0/core/primitive.slice.html">[T]</a>&gt;</span><a href="#deref-methods-%5BT%5D" class="anchor">§</a></h2></summary><div id="deref-methods-%5BT%5D-1" class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.as_str" class="method"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/ascii/ascii_char.rs.html#564">source</a><h4 class="code-header">pub fn <a href="#method.as_str" class="fn">as_str</a>(&amp;self) -&gt; &amp;<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.str.html">str</a></h4></section><span class="item-info"><div class="stab unstable"><span class="emoji">🔬</span><span>This is a nightly-only experimental API. (<code>ascii_char</code>)</span></div></span></summary><div class="docblock"><p>Views this slice of ASCII characters as a UTF-8 <code>str</code>.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.as_bytes" class="method"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/ascii/ascii_char.rs.html#575">source</a><h4 class="code-header">pub fn <a href="#method.as_bytes" class="fn">as_bytes</a>(&amp;self) -&gt; &amp;[<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.u8.html">u8</a>]</h4></section><span class="item-info"><div class="stab unstable"><span class="emoji">🔬</span><span>This is a nightly-only experimental API. (<code>ascii_char</code>)</span></div></span></summary><div class="docblock"><p>Views this slice of ASCII characters as a slice of <code>u8</code> bytes.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.is_ascii" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.23.0">1.23.0</span> · <a class="src" href="https://doc.rust-lang.org/1.83.0/src/core/slice/ascii.rs.html#15">source</a></span><h4 class="code-header">pub fn <a href="#method.is_ascii" class="fn">is_ascii</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.bool.html">bool</a></h4></section></summary><div class="docblock"><p>Checks if all bytes in this slice are within the ASCII range.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.as_ascii" class="method"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/slice/ascii.rs.html#24">source</a><h4 class="code-header">pub fn <a href="#method.as_ascii" class="fn">as_ascii</a>(&amp;self) -&gt; <a class="enum" href="https://doc.rust-lang.org/1.83.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a>&lt;&amp;[<a class="enum" href="https://doc.rust-lang.org/1.83.0/core/ascii/ascii_char/enum.AsciiChar.html" title="enum core::ascii::ascii_char::AsciiChar">AsciiChar</a>]&gt;</h4></section><span class="item-info"><div class="stab unstable"><span class="emoji">🔬</span><span>This is a nightly-only experimental API. (<code>ascii_char</code>)</span></div></span></summary><div class="docblock"><p>If this slice <a href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html#method.is_ascii" title="method slice::is_ascii"><code>is_ascii</code></a>, returns it as a slice of
<a href="https://doc.rust-lang.org/1.83.0/core/ascii/ascii_char/enum.AsciiChar.html" title="enum core::ascii::ascii_char::AsciiChar">ASCII characters</a>, otherwise returns <code>None</code>.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.as_ascii_unchecked" class="method"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/slice/ascii.rs.html#42">source</a><h4 class="code-header">pub unsafe fn <a href="#method.as_ascii_unchecked" class="fn">as_ascii_unchecked</a>(&amp;self) -&gt; &amp;[<a class="enum" href="https://doc.rust-lang.org/1.83.0/core/ascii/ascii_char/enum.AsciiChar.html" title="enum core::ascii::ascii_char::AsciiChar">AsciiChar</a>]</h4></section><span class="item-info"><div class="stab unstable"><span class="emoji">🔬</span><span>This is a nightly-only experimental API. (<code>ascii_char</code>)</span></div></span></summary><div class="docblock"><p>Converts this slice of bytes into a slice of ASCII characters,
without checking whether they’re valid.</p>
<h5 id="safety"><a class="doc-anchor" href="#safety">§</a>Safety</h5>
<p>Every byte in the slice must be in <code>0..=127</code>, or else this is UB.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.eq_ignore_ascii_case" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.23.0">1.23.0</span> · <a class="src" href="https://doc.rust-lang.org/1.83.0/src/core/slice/ascii.rs.html#56">source</a></span><h4 class="code-header">pub fn <a href="#method.eq_ignore_ascii_case" class="fn">eq_ignore_ascii_case</a>(&amp;self, other: &amp;[<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.u8.html">u8</a>]) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.bool.html">bool</a></h4></section></summary><div class="docblock"><p>Checks that two slices are an ASCII case-insensitive match.</p>
<p>Same as <code>to_ascii_lowercase(a) == to_ascii_lowercase(b)</code>,
but without allocating and copying temporaries.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.escape_ascii" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.60.0">1.60.0</span> · <a class="src" href="https://doc.rust-lang.org/1.83.0/src/core/slice/ascii.rs.html#118">source</a></span><h4 class="code-header">pub fn <a href="#method.escape_ascii" class="fn">escape_ascii</a>(&amp;self) -&gt; <a class="struct" href="https://doc.rust-lang.org/1.83.0/core/slice/ascii/struct.EscapeAscii.html" title="struct core::slice::ascii::EscapeAscii">EscapeAscii</a>&lt;'_&gt;</h4></section></summary><div class="docblock"><p>Returns an iterator that produces an escaped version of this slice,
treating it as an ASCII string.</p>
<h5 id="examples-6"><a class="doc-anchor" href="#examples-6">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code>
<span class="kw">let </span>s = <span class="string">b"0\t\r\n'\"\\\x9d"</span>;
<span class="kw">let </span>escaped = s.escape_ascii().to_string();
<span class="macro">assert_eq!</span>(escaped, <span class="string">"0\\t\\r\\n\\'\\\"\\\\\\x9d"</span>);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.trim_ascii_start" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.80.0">1.80.0</span> · <a class="src" href="https://doc.rust-lang.org/1.83.0/src/core/slice/ascii.rs.html#137">source</a></span><h4 class="code-header">pub fn <a href="#method.trim_ascii_start" class="fn">trim_ascii_start</a>(&amp;self) -&gt; &amp;[<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.u8.html">u8</a>]</h4></section></summary><div class="docblock"><p>Returns a byte slice with leading ASCII whitespace bytes removed.</p>
<p>‘Whitespace’ refers to the definition used by
<a href="https://doc.rust-lang.org/1.83.0/core/primitive.u8.html#method.is_ascii_whitespace" title="method u8::is_ascii_whitespace"><code>u8::is_ascii_whitespace</code></a>.</p>
<h5 id="examples-7"><a class="doc-anchor" href="#examples-7">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="macro">assert_eq!</span>(<span class="string">b" \t hello world\n"</span>.trim_ascii_start(), <span class="string">b"hello world\n"</span>);
<span class="macro">assert_eq!</span>(<span class="string">b" "</span>.trim_ascii_start(), <span class="string">b""</span>);
<span class="macro">assert_eq!</span>(<span class="string">b""</span>.trim_ascii_start(), <span class="string">b""</span>);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.trim_ascii_end" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.80.0">1.80.0</span> · <a class="src" href="https://doc.rust-lang.org/1.83.0/src/core/slice/ascii.rs.html#166">source</a></span><h4 class="code-header">pub fn <a href="#method.trim_ascii_end" class="fn">trim_ascii_end</a>(&amp;self) -&gt; &amp;[<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.u8.html">u8</a>]</h4></section></summary><div class="docblock"><p>Returns a byte slice with trailing ASCII whitespace bytes removed.</p>
<p>‘Whitespace’ refers to the definition used by
<a href="https://doc.rust-lang.org/1.83.0/core/primitive.u8.html#method.is_ascii_whitespace" title="method u8::is_ascii_whitespace"><code>u8::is_ascii_whitespace</code></a>.</p>
<h5 id="examples-8"><a class="doc-anchor" href="#examples-8">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="macro">assert_eq!</span>(<span class="string">b"\r hello world\n "</span>.trim_ascii_end(), <span class="string">b"\r hello world"</span>);
<span class="macro">assert_eq!</span>(<span class="string">b" "</span>.trim_ascii_end(), <span class="string">b""</span>);
<span class="macro">assert_eq!</span>(<span class="string">b""</span>.trim_ascii_end(), <span class="string">b""</span>);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.trim_ascii" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.80.0">1.80.0</span> · <a class="src" href="https://doc.rust-lang.org/1.83.0/src/core/slice/ascii.rs.html#196">source</a></span><h4 class="code-header">pub fn <a href="#method.trim_ascii" class="fn">trim_ascii</a>(&amp;self) -&gt; &amp;[<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.u8.html">u8</a>]</h4></section></summary><div class="docblock"><p>Returns a byte slice with leading and trailing ASCII whitespace bytes
removed.</p>
<p>‘Whitespace’ refers to the definition used by
<a href="https://doc.rust-lang.org/1.83.0/core/primitive.u8.html#method.is_ascii_whitespace" title="method u8::is_ascii_whitespace"><code>u8::is_ascii_whitespace</code></a>.</p>
<h5 id="examples-9"><a class="doc-anchor" href="#examples-9">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="macro">assert_eq!</span>(<span class="string">b"\r hello world\n "</span>.trim_ascii(), <span class="string">b"hello world"</span>);
<span class="macro">assert_eq!</span>(<span class="string">b" "</span>.trim_ascii(), <span class="string">b""</span>);
<span class="macro">assert_eq!</span>(<span class="string">b""</span>.trim_ascii(), <span class="string">b""</span>);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.len-1" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="src" href="https://doc.rust-lang.org/1.83.0/src/core/slice/mod.rs.html#116">source</a></span><h4 class="code-header">pub fn <a href="#method.len-1" class="fn">len</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.usize.html">usize</a></h4></section></summary><div class="docblock"><p>Returns the number of elements in the slice.</p>
<h5 id="examples-10"><a class="doc-anchor" href="#examples-10">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>a = [<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>];
<span class="macro">assert_eq!</span>(a.len(), <span class="number">3</span>);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.is_empty" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="src" href="https://doc.rust-lang.org/1.83.0/src/core/slice/mod.rs.html#135">source</a></span><h4 class="code-header">pub fn <a href="#method.is_empty" class="fn">is_empty</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.bool.html">bool</a></h4></section></summary><div class="docblock"><p>Returns <code>true</code> if the slice has a length of 0.</p>
<h5 id="examples-11"><a class="doc-anchor" href="#examples-11">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>a = [<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>];
<span class="macro">assert!</span>(!a.is_empty());
<span class="kw">let </span>b: <span class="kw-2">&amp;</span>[i32] = <span class="kw-2">&amp;</span>[];
<span class="macro">assert!</span>(b.is_empty());</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.first" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="src" href="https://doc.rust-lang.org/1.83.0/src/core/slice/mod.rs.html#154">source</a></span><h4 class="code-header">pub fn <a href="#method.first" class="fn">first</a>(&amp;self) -&gt; <a class="enum" href="https://doc.rust-lang.org/1.83.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.reference.html">&amp;T</a>&gt;</h4></section></summary><div class="docblock"><p>Returns the first element of the slice, or <code>None</code> if it is empty.</p>
<h5 id="examples-12"><a class="doc-anchor" href="#examples-12">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>v = [<span class="number">10</span>, <span class="number">40</span>, <span class="number">30</span>];
<span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="kw-2">&amp;</span><span class="number">10</span>), v.first());
<span class="kw">let </span>w: <span class="kw-2">&amp;</span>[i32] = <span class="kw-2">&amp;</span>[];
<span class="macro">assert_eq!</span>(<span class="prelude-val">None</span>, w.first());</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.split_first" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.5.0">1.5.0</span> · <a class="src" href="https://doc.rust-lang.org/1.83.0/src/core/slice/mod.rs.html#198">source</a></span><h4 class="code-header">pub fn <a href="#method.split_first" class="fn">split_first</a>(&amp;self) -&gt; <a class="enum" href="https://doc.rust-lang.org/1.83.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a>&lt;(<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.reference.html">&amp;T</a>, &amp;<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html">[T]</a>)&gt;</h4></section></summary><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>
<h5 id="examples-13"><a class="doc-anchor" href="#examples-13">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>x = <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 let </span><span class="prelude-val">Some</span>((first, elements)) = x.split_first() {
<span class="macro">assert_eq!</span>(first, <span class="kw-2">&amp;</span><span class="number">0</span>);
<span class="macro">assert_eq!</span>(elements, <span class="kw-2">&amp;</span>[<span class="number">1</span>, <span class="number">2</span>]);
}</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.split_last" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.5.0">1.5.0</span> · <a class="src" href="https://doc.rust-lang.org/1.83.0/src/core/slice/mod.rs.html#241">source</a></span><h4 class="code-header">pub fn <a href="#method.split_last" class="fn">split_last</a>(&amp;self) -&gt; <a class="enum" href="https://doc.rust-lang.org/1.83.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a>&lt;(<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.reference.html">&amp;T</a>, &amp;<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html">[T]</a>)&gt;</h4></section></summary><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>
<h5 id="examples-14"><a class="doc-anchor" href="#examples-14">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>x = <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 let </span><span class="prelude-val">Some</span>((last, elements)) = x.split_last() {
<span class="macro">assert_eq!</span>(last, <span class="kw-2">&amp;</span><span class="number">2</span>);
<span class="macro">assert_eq!</span>(elements, <span class="kw-2">&amp;</span>[<span class="number">0</span>, <span class="number">1</span>]);
}</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.last" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="src" href="https://doc.rust-lang.org/1.83.0/src/core/slice/mod.rs.html#283">source</a></span><h4 class="code-header">pub fn <a href="#method.last" class="fn">last</a>(&amp;self) -&gt; <a class="enum" href="https://doc.rust-lang.org/1.83.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.reference.html">&amp;T</a>&gt;</h4></section></summary><div class="docblock"><p>Returns the last element of the slice, or <code>None</code> if it is empty.</p>
<h5 id="examples-15"><a class="doc-anchor" href="#examples-15">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>v = [<span class="number">10</span>, <span class="number">40</span>, <span class="number">30</span>];
<span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="kw-2">&amp;</span><span class="number">30</span>), v.last());
<span class="kw">let </span>w: <span class="kw-2">&amp;</span>[i32] = <span class="kw-2">&amp;</span>[];
<span class="macro">assert_eq!</span>(<span class="prelude-val">None</span>, w.last());</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.first_chunk" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.77.0">1.77.0</span> · <a class="src" href="https://doc.rust-lang.org/1.83.0/src/core/slice/mod.rs.html#330">source</a></span><h4 class="code-header">pub fn <a href="#method.first_chunk" class="fn">first_chunk</a>&lt;const N: <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.usize.html">usize</a>&gt;(&amp;self) -&gt; <a class="enum" href="https://doc.rust-lang.org/1.83.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a>&lt;&amp;<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.array.html">[T; N]</a>&gt;</h4></section></summary><div class="docblock"><p>Returns an array reference to the first <code>N</code> items in the slice.</p>
<p>If the slice is not at least <code>N</code> in length, this will return <code>None</code>.</p>
<h5 id="examples-16"><a class="doc-anchor" href="#examples-16">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>u = [<span class="number">10</span>, <span class="number">40</span>, <span class="number">30</span>];
<span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="kw-2">&amp;</span>[<span class="number">10</span>, <span class="number">40</span>]), u.first_chunk::&lt;<span class="number">2</span>&gt;());
<span class="kw">let </span>v: <span class="kw-2">&amp;</span>[i32] = <span class="kw-2">&amp;</span>[<span class="number">10</span>];
<span class="macro">assert_eq!</span>(<span class="prelude-val">None</span>, v.first_chunk::&lt;<span class="number">2</span>&gt;());
<span class="kw">let </span>w: <span class="kw-2">&amp;</span>[i32] = <span class="kw-2">&amp;</span>[];
<span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="kw-2">&amp;</span>[]), w.first_chunk::&lt;<span class="number">0</span>&gt;());</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.split_first_chunk" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.77.0">1.77.0</span> · <a class="src" href="https://doc.rust-lang.org/1.83.0/src/core/slice/mod.rs.html#391">source</a></span><h4 class="code-header">pub fn <a href="#method.split_first_chunk" class="fn">split_first_chunk</a>&lt;const N: <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.usize.html">usize</a>&gt;(&amp;self) -&gt; <a class="enum" href="https://doc.rust-lang.org/1.83.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a>&lt;(&amp;<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.array.html">[T; N]</a>, &amp;<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html">[T]</a>)&gt;</h4></section></summary><div class="docblock"><p>Returns an array reference to the first <code>N</code> items in the slice and the remaining slice.</p>
<p>If the slice is not at least <code>N</code> in length, this will return <code>None</code>.</p>
<h5 id="examples-17"><a class="doc-anchor" href="#examples-17">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>x = <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 let </span><span class="prelude-val">Some</span>((first, elements)) = x.split_first_chunk::&lt;<span class="number">2</span>&gt;() {
<span class="macro">assert_eq!</span>(first, <span class="kw-2">&amp;</span>[<span class="number">0</span>, <span class="number">1</span>]);
<span class="macro">assert_eq!</span>(elements, <span class="kw-2">&amp;</span>[<span class="number">2</span>]);
}
<span class="macro">assert_eq!</span>(<span class="prelude-val">None</span>, x.split_first_chunk::&lt;<span class="number">4</span>&gt;());</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.split_last_chunk" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.77.0">1.77.0</span> · <a class="src" href="https://doc.rust-lang.org/1.83.0/src/core/slice/mod.rs.html#462">source</a></span><h4 class="code-header">pub fn <a href="#method.split_last_chunk" class="fn">split_last_chunk</a>&lt;const N: <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.usize.html">usize</a>&gt;(&amp;self) -&gt; <a class="enum" href="https://doc.rust-lang.org/1.83.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a>&lt;(&amp;<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html">[T]</a>, &amp;<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.array.html">[T; N]</a>)&gt;</h4></section></summary><div class="docblock"><p>Returns an array reference to the last <code>N</code> items in the slice and the remaining slice.</p>
<p>If the slice is not at least <code>N</code> in length, this will return <code>None</code>.</p>
<h5 id="examples-18"><a class="doc-anchor" href="#examples-18">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>x = <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 let </span><span class="prelude-val">Some</span>((elements, last)) = x.split_last_chunk::&lt;<span class="number">2</span>&gt;() {
<span class="macro">assert_eq!</span>(elements, <span class="kw-2">&amp;</span>[<span class="number">0</span>]);
<span class="macro">assert_eq!</span>(last, <span class="kw-2">&amp;</span>[<span class="number">1</span>, <span class="number">2</span>]);
}
<span class="macro">assert_eq!</span>(<span class="prelude-val">None</span>, x.split_last_chunk::&lt;<span class="number">4</span>&gt;());</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.last_chunk" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.77.0">1.77.0</span> · <a class="src" href="https://doc.rust-lang.org/1.83.0/src/core/slice/mod.rs.html#533">source</a></span><h4 class="code-header">pub fn <a href="#method.last_chunk" class="fn">last_chunk</a>&lt;const N: <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.usize.html">usize</a>&gt;(&amp;self) -&gt; <a class="enum" href="https://doc.rust-lang.org/1.83.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a>&lt;&amp;<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.array.html">[T; N]</a>&gt;</h4></section></summary><div class="docblock"><p>Returns an array reference to the last <code>N</code> items in the slice.</p>
<p>If the slice is not at least <code>N</code> in length, this will return <code>None</code>.</p>
<h5 id="examples-19"><a class="doc-anchor" href="#examples-19">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>u = [<span class="number">10</span>, <span class="number">40</span>, <span class="number">30</span>];
<span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="kw-2">&amp;</span>[<span class="number">40</span>, <span class="number">30</span>]), u.last_chunk::&lt;<span class="number">2</span>&gt;());
<span class="kw">let </span>v: <span class="kw-2">&amp;</span>[i32] = <span class="kw-2">&amp;</span>[<span class="number">10</span>];
<span class="macro">assert_eq!</span>(<span class="prelude-val">None</span>, v.last_chunk::&lt;<span class="number">2</span>&gt;());
<span class="kw">let </span>w: <span class="kw-2">&amp;</span>[i32] = <span class="kw-2">&amp;</span>[];
<span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="kw-2">&amp;</span>[]), w.last_chunk::&lt;<span class="number">0</span>&gt;());</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.get" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="src" href="https://doc.rust-lang.org/1.83.0/src/core/slice/mod.rs.html#603-605">source</a></span><h4 class="code-header">pub fn <a href="#method.get" class="fn">get</a>&lt;I&gt;(&amp;self, index: I) -&gt; <a class="enum" href="https://doc.rust-lang.org/1.83.0/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/1.83.0/core/slice/index/trait.SliceIndex.html" title="trait core::slice::index::SliceIndex">SliceIndex</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html">[T]</a>&gt;&gt;::<a class="associatedtype" href="https://doc.rust-lang.org/1.83.0/core/slice/index/trait.SliceIndex.html#associatedtype.Output" title="type core::slice::index::SliceIndex::Output">Output</a>&gt;<div class="where">where
I: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/slice/index/trait.SliceIndex.html" title="trait core::slice::index::SliceIndex">SliceIndex</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html">[T]</a>&gt;,</div></h4></section></summary><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>
<h5 id="examples-20"><a class="doc-anchor" href="#examples-20">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>v = [<span class="number">10</span>, <span class="number">40</span>, <span class="number">30</span>];
<span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="kw-2">&amp;</span><span class="number">40</span>), v.get(<span class="number">1</span>));
<span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="kw-2">&amp;</span>[<span class="number">10</span>, <span class="number">40</span>][..]), v.get(<span class="number">0</span>..<span class="number">2</span>));
<span class="macro">assert_eq!</span>(<span class="prelude-val">None</span>, v.get(<span class="number">3</span>));
<span class="macro">assert_eq!</span>(<span class="prelude-val">None</span>, v.get(<span class="number">0</span>..<span class="number">4</span>));</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.get_unchecked" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="src" href="https://doc.rust-lang.org/1.83.0/src/core/slice/mod.rs.html#665-667">source</a></span><h4 class="code-header">pub unsafe fn <a href="#method.get_unchecked" class="fn">get_unchecked</a>&lt;I&gt;(
&amp;self,
index: I,
) -&gt; &amp;&lt;I as <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/slice/index/trait.SliceIndex.html" title="trait core::slice::index::SliceIndex">SliceIndex</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html">[T]</a>&gt;&gt;::<a class="associatedtype" href="https://doc.rust-lang.org/1.83.0/core/slice/index/trait.SliceIndex.html#associatedtype.Output" title="type core::slice::index::SliceIndex::Output">Output</a><div class="where">where
I: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/slice/index/trait.SliceIndex.html" title="trait core::slice::index::SliceIndex">SliceIndex</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html">[T]</a>&gt;,</div></h4></section></summary><div class="docblock"><p>Returns a reference to an element or subslice, without doing bounds
checking.</p>
<p>For a safe alternative see <a href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html#method.get" title="method slice::get"><code>get</code></a>.</p>
<h5 id="safety-1"><a class="doc-anchor" href="#safety-1">§</a>Safety</h5>
<p>Calling this method with an out-of-bounds index is <em><a href="https://doc.rust-lang.org/reference/behavior-considered-undefined.html">undefined behavior</a></em>
even if the resulting reference is not used.</p>
<p>You can think of this like <code>.get(index).unwrap_unchecked()</code>. It’s UB
to call <code>.get_unchecked(len)</code>, even if you immediately convert to a
pointer. And it’s UB to call <code>.get_unchecked(..len + 1)</code>,
<code>.get_unchecked(..=len)</code>, or similar.</p>
<h5 id="examples-21"><a class="doc-anchor" href="#examples-21">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>x = <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>(x.get_unchecked(<span class="number">1</span>), <span class="kw-2">&amp;</span><span class="number">2</span>);
}</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.as_ptr" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="src" href="https://doc.rust-lang.org/1.83.0/src/core/slice/mod.rs.html#748">source</a></span><h4 class="code-header">pub fn <a href="#method.as_ptr" class="fn">as_ptr</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.pointer.html">*const T</a></h4></section></summary><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 dangling.</p>
<p>The caller must also ensure that the memory the pointer (non-transitively) points to
is never written to (except inside an <code>UnsafeCell</code>) using this pointer or any pointer
derived from it. If you need to mutate the contents of the slice, use <a href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html#method.as_mut_ptr" title="method slice::as_mut_ptr"><code>as_mut_ptr</code></a>.</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>
<h5 id="examples-22"><a class="doc-anchor" href="#examples-22">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>x = <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>x_ptr = x.as_ptr();
<span class="kw">unsafe </span>{
<span class="kw">for </span>i <span class="kw">in </span><span class="number">0</span>..x.len() {
<span class="macro">assert_eq!</span>(x.get_unchecked(i), <span class="kw-2">&amp;*</span>x_ptr.add(i));
}
}</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.as_ptr_range" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.48.0">1.48.0</span> · <a class="src" href="https://doc.rust-lang.org/1.83.0/src/core/slice/mod.rs.html#815">source</a></span><h4 class="code-header">pub fn <a href="#method.as_ptr_range" class="fn">as_ptr_range</a>(&amp;self) -&gt; <a class="struct" href="https://doc.rust-lang.org/1.83.0/core/ops/range/struct.Range.html" title="struct core::ops::range::Range">Range</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.pointer.html">*const T</a>&gt;</h4></section></summary><div class="docblock"><p>Returns the two raw pointers spanning the slice.</p>
<p>The returned range is half-open, which means that the end pointer
points <em>one past</em> the last element of the slice. This way, an empty
slice is represented by two equal pointers, and the difference between
the two pointers represents the size of the slice.</p>
<p>See <a href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html#method.as_ptr" title="method slice::as_ptr"><code>as_ptr</code></a> for warnings on using these pointers. The end pointer
requires extra caution, as it does not point to a valid element in the
slice.</p>
<p>This function is useful for interacting with foreign interfaces which
use two pointers to refer to a range of elements in memory, as is
common in C++.</p>
<p>It can also be useful to check if a pointer to an element refers to an
element of this slice:</p>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>a = [<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>];
<span class="kw">let </span>x = <span class="kw-2">&amp;</span>a[<span class="number">1</span>] <span class="kw">as </span><span class="kw-2">*const </span><span class="kw">_</span>;
<span class="kw">let </span>y = <span class="kw-2">&amp;</span><span class="number">5 </span><span class="kw">as </span><span class="kw-2">*const </span><span class="kw">_</span>;
<span class="macro">assert!</span>(a.as_ptr_range().contains(<span class="kw-2">&amp;</span>x));
<span class="macro">assert!</span>(!a.as_ptr_range().contains(<span class="kw-2">&amp;</span>y));</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.iter" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="src" href="https://doc.rust-lang.org/1.83.0/src/core/slice/mod.rs.html#1021">source</a></span><h4 class="code-header">pub fn <a href="#method.iter" class="fn">iter</a>(&amp;self) -&gt; <a class="struct" href="https://doc.rust-lang.org/1.83.0/core/slice/iter/struct.Iter.html" title="struct core::slice::iter::Iter">Iter</a>&lt;'_, T&gt;</h4></section></summary><div class="docblock"><p>Returns an iterator over the slice.</p>
<p>The iterator yields all items from start to end.</p>
<h5 id="examples-23"><a class="doc-anchor" href="#examples-23">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>x = <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>iterator = x.iter();
<span class="macro">assert_eq!</span>(iterator.next(), <span class="prelude-val">Some</span>(<span class="kw-2">&amp;</span><span class="number">1</span>));
<span class="macro">assert_eq!</span>(iterator.next(), <span class="prelude-val">Some</span>(<span class="kw-2">&amp;</span><span class="number">2</span>));
<span class="macro">assert_eq!</span>(iterator.next(), <span class="prelude-val">Some</span>(<span class="kw-2">&amp;</span><span class="number">4</span>));
<span class="macro">assert_eq!</span>(iterator.next(), <span class="prelude-val">None</span>);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.windows" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="src" href="https://doc.rust-lang.org/1.83.0/src/core/slice/mod.rs.html#1089">source</a></span><h4 class="code-header">pub fn <a href="#method.windows" class="fn">windows</a>(&amp;self, size: <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.usize.html">usize</a>) -&gt; <a class="struct" href="https://doc.rust-lang.org/1.83.0/core/slice/iter/struct.Windows.html" title="struct core::slice::iter::Windows">Windows</a>&lt;'_, T&gt;</h4></section></summary><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>
<h5 id="panics"><a class="doc-anchor" href="#panics">§</a>Panics</h5>
<p>Panics if <code>size</code> is 0.</p>
<h5 id="examples-24"><a class="doc-anchor" href="#examples-24">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>slice = [<span class="string">'l'</span>, <span class="string">'o'</span>, <span class="string">'r'</span>, <span class="string">'e'</span>, <span class="string">'m'</span>];
<span class="kw">let </span><span class="kw-2">mut </span>iter = slice.windows(<span class="number">3</span>);
<span class="macro">assert_eq!</span>(iter.next().unwrap(), <span class="kw-2">&amp;</span>[<span class="string">'l'</span>, <span class="string">'o'</span>, <span class="string">'r'</span>]);
<span class="macro">assert_eq!</span>(iter.next().unwrap(), <span class="kw-2">&amp;</span>[<span class="string">'o'</span>, <span class="string">'r'</span>, <span class="string">'e'</span>]);
<span class="macro">assert_eq!</span>(iter.next().unwrap(), <span class="kw-2">&amp;</span>[<span class="string">'r'</span>, <span class="string">'e'</span>, <span class="string">'m'</span>]);
<span class="macro">assert!</span>(iter.next().is_none());</code></pre></div>
<p>If the slice is shorter than <code>size</code>:</p>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>slice = [<span class="string">'f'</span>, <span class="string">'o'</span>, <span class="string">'o'</span>];
<span class="kw">let </span><span class="kw-2">mut </span>iter = slice.windows(<span class="number">4</span>);
<span class="macro">assert!</span>(iter.next().is_none());</code></pre></div>
<p>There’s no <code>windows_mut</code>, as that existing would let safe code violate the
“only one <code>&amp;mut</code> at a time to the same thing” rule. However, you can sometimes
use <a href="https://doc.rust-lang.org/1.83.0/core/cell/struct.Cell.html#method.as_slice_of_cells" title="method core::cell::Cell::as_slice_of_cells"><code>Cell::as_slice_of_cells</code></a> in
conjunction with <code>windows</code> to accomplish something similar:</p>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>std::cell::Cell;
<span class="kw">let </span><span class="kw-2">mut </span>array = [<span class="string">'R'</span>, <span class="string">'u'</span>, <span class="string">'s'</span>, <span class="string">'t'</span>, <span class="string">' '</span>, <span class="string">'2'</span>, <span class="string">'0'</span>, <span class="string">'1'</span>, <span class="string">'5'</span>];
<span class="kw">let </span>slice = <span class="kw-2">&amp;mut </span>array[..];
<span class="kw">let </span>slice_of_cells: <span class="kw-2">&amp;</span>[Cell&lt;char&gt;] = Cell::from_mut(slice).as_slice_of_cells();
<span class="kw">for </span>w <span class="kw">in </span>slice_of_cells.windows(<span class="number">3</span>) {
Cell::swap(<span class="kw-2">&amp;</span>w[<span class="number">0</span>], <span class="kw-2">&amp;</span>w[<span class="number">2</span>]);
}
<span class="macro">assert_eq!</span>(array, [<span class="string">'s'</span>, <span class="string">'t'</span>, <span class="string">' '</span>, <span class="string">'2'</span>, <span class="string">'0'</span>, <span class="string">'1'</span>, <span class="string">'5'</span>, <span class="string">'u'</span>, <span class="string">'R'</span>]);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.chunks" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="src" href="https://doc.rust-lang.org/1.83.0/src/core/slice/mod.rs.html#1124">source</a></span><h4 class="code-header">pub fn <a href="#method.chunks" class="fn">chunks</a>(&amp;self, chunk_size: <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.usize.html">usize</a>) -&gt; <a class="struct" href="https://doc.rust-lang.org/1.83.0/core/slice/iter/struct.Chunks.html" title="struct core::slice::iter::Chunks">Chunks</a>&lt;'_, T&gt;</h4></section></summary><div class="docblock"><p>Returns an iterator over <code>chunk_size</code> elements of the slice at a time, starting at the
beginning of the slice.</p>
<p>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="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html#method.chunks_exact" title="method slice::chunks_exact"><code>chunks_exact</code></a> for a variant of this iterator that returns chunks of always exactly
<code>chunk_size</code> elements, and <a href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html#method.rchunks" title="method slice::rchunks"><code>rchunks</code></a> for the same iterator but starting at the end of the
slice.</p>
<h5 id="panics-1"><a class="doc-anchor" href="#panics-1">§</a>Panics</h5>
<p>Panics if <code>chunk_size</code> is 0.</p>
<h5 id="examples-25"><a class="doc-anchor" href="#examples-25">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>slice = [<span class="string">'l'</span>, <span class="string">'o'</span>, <span class="string">'r'</span>, <span class="string">'e'</span>, <span class="string">'m'</span>];
<span class="kw">let </span><span class="kw-2">mut </span>iter = slice.chunks(<span class="number">2</span>);
<span class="macro">assert_eq!</span>(iter.next().unwrap(), <span class="kw-2">&amp;</span>[<span class="string">'l'</span>, <span class="string">'o'</span>]);
<span class="macro">assert_eq!</span>(iter.next().unwrap(), <span class="kw-2">&amp;</span>[<span class="string">'r'</span>, <span class="string">'e'</span>]);
<span class="macro">assert_eq!</span>(iter.next().unwrap(), <span class="kw-2">&amp;</span>[<span class="string">'m'</span>]);
<span class="macro">assert!</span>(iter.next().is_none());</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.chunks_exact" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.31.0">1.31.0</span> · <a class="src" href="https://doc.rust-lang.org/1.83.0/src/core/slice/mod.rs.html#1201">source</a></span><h4 class="code-header">pub fn <a href="#method.chunks_exact" class="fn">chunks_exact</a>(&amp;self, chunk_size: <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.usize.html">usize</a>) -&gt; <a class="struct" href="https://doc.rust-lang.org/1.83.0/core/slice/iter/struct.ChunksExact.html" title="struct core::slice::iter::ChunksExact">ChunksExact</a>&lt;'_, T&gt;</h4></section></summary><div class="docblock"><p>Returns an iterator over <code>chunk_size</code> elements of the slice at a time, starting at the
beginning of the slice.</p>
<p>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 and can be retrieved
from the <code>remainder</code> function of the iterator.</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="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html#method.chunks" title="method slice::chunks"><code>chunks</code></a>.</p>
<p>See <a href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html#method.chunks" title="method slice::chunks"><code>chunks</code></a> for a variant of this iterator that also returns the remainder as a smaller
chunk, and <a href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html#method.rchunks_exact" title="method slice::rchunks_exact"><code>rchunks_exact</code></a> for the same iterator but starting at the end of the slice.</p>
<h5 id="panics-2"><a class="doc-anchor" href="#panics-2">§</a>Panics</h5>
<p>Panics if <code>chunk_size</code> is 0.</p>
<h5 id="examples-26"><a class="doc-anchor" href="#examples-26">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>slice = [<span class="string">'l'</span>, <span class="string">'o'</span>, <span class="string">'r'</span>, <span class="string">'e'</span>, <span class="string">'m'</span>];
<span class="kw">let </span><span class="kw-2">mut </span>iter = slice.chunks_exact(<span class="number">2</span>);
<span class="macro">assert_eq!</span>(iter.next().unwrap(), <span class="kw-2">&amp;</span>[<span class="string">'l'</span>, <span class="string">'o'</span>]);
<span class="macro">assert_eq!</span>(iter.next().unwrap(), <span class="kw-2">&amp;</span>[<span class="string">'r'</span>, <span class="string">'e'</span>]);
<span class="macro">assert!</span>(iter.next().is_none());
<span class="macro">assert_eq!</span>(iter.remainder(), <span class="kw-2">&amp;</span>[<span class="string">'m'</span>]);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.as_chunks_unchecked" class="method"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/slice/mod.rs.html#1279">source</a><h4 class="code-header">pub unsafe fn <a href="#method.as_chunks_unchecked" class="fn">as_chunks_unchecked</a>&lt;const N: <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.usize.html">usize</a>&gt;(&amp;self) -&gt; &amp;[<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.array.html">[T; N]</a>]</h4></section><span class="item-info"><div class="stab unstable"><span class="emoji">🔬</span><span>This is a nightly-only experimental API. (<code>slice_as_chunks</code>)</span></div></span></summary><div class="docblock"><p>Splits the slice into a slice of <code>N</code>-element arrays,
assuming that there’s no remainder.</p>
<h5 id="safety-2"><a class="doc-anchor" href="#safety-2">§</a>Safety</h5>
<p>This may only be called when</p>
<ul>
<li>The slice splits exactly into <code>N</code>-element chunks (aka <code>self.len() % N == 0</code>).</li>
<li><code>N != 0</code>.</li>
</ul>
<h5 id="examples-27"><a class="doc-anchor" href="#examples-27">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="attr">#![feature(slice_as_chunks)]
</span><span class="kw">let </span>slice: <span class="kw-2">&amp;</span>[char] = <span class="kw-2">&amp;</span>[<span class="string">'l'</span>, <span class="string">'o'</span>, <span class="string">'r'</span>, <span class="string">'e'</span>, <span class="string">'m'</span>, <span class="string">'!'</span>];
<span class="kw">let </span>chunks: <span class="kw-2">&amp;</span>[[char; <span class="number">1</span>]] =
<span class="comment">// SAFETY: 1-element chunks never have remainder
</span><span class="kw">unsafe </span>{ slice.as_chunks_unchecked() };
<span class="macro">assert_eq!</span>(chunks, <span class="kw-2">&amp;</span>[[<span class="string">'l'</span>], [<span class="string">'o'</span>], [<span class="string">'r'</span>], [<span class="string">'e'</span>], [<span class="string">'m'</span>], [<span class="string">'!'</span>]]);
<span class="kw">let </span>chunks: <span class="kw-2">&amp;</span>[[char; <span class="number">3</span>]] =
<span class="comment">// SAFETY: The slice length (6) is a multiple of 3
</span><span class="kw">unsafe </span>{ slice.as_chunks_unchecked() };
<span class="macro">assert_eq!</span>(chunks, <span class="kw-2">&amp;</span>[[<span class="string">'l'</span>, <span class="string">'o'</span>, <span class="string">'r'</span>], [<span class="string">'e'</span>, <span class="string">'m'</span>, <span class="string">'!'</span>]]);
<span class="comment">// These would be unsound:
// let chunks: &amp;[[_; 5]] = slice.as_chunks_unchecked() // The slice length is not a multiple of 5
// let chunks: &amp;[[_; 0]] = slice.as_chunks_unchecked() // Zero-length chunks are never allowed</span></code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.as_chunks" class="method"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/slice/mod.rs.html#1325">source</a><h4 class="code-header">pub fn <a href="#method.as_chunks" class="fn">as_chunks</a>&lt;const N: <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.usize.html">usize</a>&gt;(&amp;self) -&gt; (&amp;[<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.array.html">[T; N]</a>], &amp;<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html">[T]</a>)</h4></section><span class="item-info"><div class="stab unstable"><span class="emoji">🔬</span><span>This is a nightly-only experimental API. (<code>slice_as_chunks</code>)</span></div></span></summary><div class="docblock"><p>Splits the slice into a slice of <code>N</code>-element arrays,
starting at the beginning of the slice,
and a remainder slice with length strictly less than <code>N</code>.</p>
<h5 id="panics-3"><a class="doc-anchor" href="#panics-3">§</a>Panics</h5>
<p>Panics if <code>N</code> is 0. This check will most probably get changed to a compile time
error before this method gets stabilized.</p>
<h5 id="examples-28"><a class="doc-anchor" href="#examples-28">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="attr">#![feature(slice_as_chunks)]
</span><span class="kw">let </span>slice = [<span class="string">'l'</span>, <span class="string">'o'</span>, <span class="string">'r'</span>, <span class="string">'e'</span>, <span class="string">'m'</span>];
<span class="kw">let </span>(chunks, remainder) = slice.as_chunks();
<span class="macro">assert_eq!</span>(chunks, <span class="kw-2">&amp;</span>[[<span class="string">'l'</span>, <span class="string">'o'</span>], [<span class="string">'r'</span>, <span class="string">'e'</span>]]);
<span class="macro">assert_eq!</span>(remainder, <span class="kw-2">&amp;</span>[<span class="string">'m'</span>]);</code></pre></div>
<p>If you expect the slice to be an exact multiple, you can combine
<code>let</code>-<code>else</code> with an empty slice pattern:</p>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="attr">#![feature(slice_as_chunks)]
</span><span class="kw">let </span>slice = [<span class="string">'R'</span>, <span class="string">'u'</span>, <span class="string">'s'</span>, <span class="string">'t'</span>];
<span class="kw">let </span>(chunks, []) = slice.as_chunks::&lt;<span class="number">2</span>&gt;() <span class="kw">else </span>{
<span class="macro">panic!</span>(<span class="string">"slice didn't have even length"</span>)
};
<span class="macro">assert_eq!</span>(chunks, <span class="kw-2">&amp;</span>[[<span class="string">'R'</span>, <span class="string">'u'</span>], [<span class="string">'s'</span>, <span class="string">'t'</span>]]);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.as_rchunks" class="method"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/slice/mod.rs.html#1359">source</a><h4 class="code-header">pub fn <a href="#method.as_rchunks" class="fn">as_rchunks</a>&lt;const N: <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.usize.html">usize</a>&gt;(&amp;self) -&gt; (&amp;<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html">[T]</a>, &amp;[<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.array.html">[T; N]</a>])</h4></section><span class="item-info"><div class="stab unstable"><span class="emoji">🔬</span><span>This is a nightly-only experimental API. (<code>slice_as_chunks</code>)</span></div></span></summary><div class="docblock"><p>Splits the slice into a slice of <code>N</code>-element arrays,
starting at the end of the slice,
and a remainder slice with length strictly less than <code>N</code>.</p>
<h5 id="panics-4"><a class="doc-anchor" href="#panics-4">§</a>Panics</h5>
<p>Panics if <code>N</code> is 0. This check will most probably get changed to a compile time
error before this method gets stabilized.</p>
<h5 id="examples-29"><a class="doc-anchor" href="#examples-29">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="attr">#![feature(slice_as_chunks)]
</span><span class="kw">let </span>slice = [<span class="string">'l'</span>, <span class="string">'o'</span>, <span class="string">'r'</span>, <span class="string">'e'</span>, <span class="string">'m'</span>];
<span class="kw">let </span>(remainder, chunks) = slice.as_rchunks();
<span class="macro">assert_eq!</span>(remainder, <span class="kw-2">&amp;</span>[<span class="string">'l'</span>]);
<span class="macro">assert_eq!</span>(chunks, <span class="kw-2">&amp;</span>[[<span class="string">'o'</span>, <span class="string">'r'</span>], [<span class="string">'e'</span>, <span class="string">'m'</span>]]);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.array_chunks" class="method"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/slice/mod.rs.html#1399">source</a><h4 class="code-header">pub fn <a href="#method.array_chunks" class="fn">array_chunks</a>&lt;const N: <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.usize.html">usize</a>&gt;(&amp;self) -&gt; <a class="struct" href="https://doc.rust-lang.org/1.83.0/core/slice/iter/struct.ArrayChunks.html" title="struct core::slice::iter::ArrayChunks">ArrayChunks</a>&lt;'_, T, N&gt;</h4></section><span class="item-info"><div class="stab unstable"><span class="emoji">🔬</span><span>This is a nightly-only experimental API. (<code>array_chunks</code>)</span></div></span></summary><div class="docblock"><p>Returns an iterator over <code>N</code> elements of the slice at a time, starting at the
beginning of the slice.</p>
<p>The chunks are array references and do not overlap. If <code>N</code> does not divide the
length of the slice, then the last up to <code>N-1</code> elements will be omitted and can be
retrieved from the <code>remainder</code> function of the iterator.</p>
<p>This method is the const generic equivalent of <a href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html#method.chunks_exact" title="method slice::chunks_exact"><code>chunks_exact</code></a>.</p>
<h5 id="panics-5"><a class="doc-anchor" href="#panics-5">§</a>Panics</h5>
<p>Panics if <code>N</code> is 0. This check will most probably get changed to a compile time
error before this method gets stabilized.</p>
<h5 id="examples-30"><a class="doc-anchor" href="#examples-30">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="attr">#![feature(array_chunks)]
</span><span class="kw">let </span>slice = [<span class="string">'l'</span>, <span class="string">'o'</span>, <span class="string">'r'</span>, <span class="string">'e'</span>, <span class="string">'m'</span>];
<span class="kw">let </span><span class="kw-2">mut </span>iter = slice.array_chunks();
<span class="macro">assert_eq!</span>(iter.next().unwrap(), <span class="kw-2">&amp;</span>[<span class="string">'l'</span>, <span class="string">'o'</span>]);
<span class="macro">assert_eq!</span>(iter.next().unwrap(), <span class="kw-2">&amp;</span>[<span class="string">'r'</span>, <span class="string">'e'</span>]);
<span class="macro">assert!</span>(iter.next().is_none());
<span class="macro">assert_eq!</span>(iter.remainder(), <span class="kw-2">&amp;</span>[<span class="string">'m'</span>]);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.array_windows" class="method"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/slice/mod.rs.html#1592">source</a><h4 class="code-header">pub fn <a href="#method.array_windows" class="fn">array_windows</a>&lt;const N: <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.usize.html">usize</a>&gt;(&amp;self) -&gt; <a class="struct" href="https://doc.rust-lang.org/1.83.0/core/slice/iter/struct.ArrayWindows.html" title="struct core::slice::iter::ArrayWindows">ArrayWindows</a>&lt;'_, T, N&gt;</h4></section><span class="item-info"><div class="stab unstable"><span class="emoji">🔬</span><span>This is a nightly-only experimental API. (<code>array_windows</code>)</span></div></span></summary><div class="docblock"><p>Returns an iterator over overlapping windows of <code>N</code> elements of a slice,
starting at the beginning of the slice.</p>
<p>This is the const generic equivalent of <a href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html#method.windows" title="method slice::windows"><code>windows</code></a>.</p>
<p>If <code>N</code> is greater than the size of the slice, it will return no windows.</p>
<h5 id="panics-6"><a class="doc-anchor" href="#panics-6">§</a>Panics</h5>
<p>Panics if <code>N</code> is 0. This check will most probably get changed to a compile time
error before this method gets stabilized.</p>
<h5 id="examples-31"><a class="doc-anchor" href="#examples-31">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="attr">#![feature(array_windows)]
</span><span class="kw">let </span>slice = [<span class="number">0</span>, <span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>];
<span class="kw">let </span><span class="kw-2">mut </span>iter = slice.array_windows();
<span class="macro">assert_eq!</span>(iter.next().unwrap(), <span class="kw-2">&amp;</span>[<span class="number">0</span>, <span class="number">1</span>]);
<span class="macro">assert_eq!</span>(iter.next().unwrap(), <span class="kw-2">&amp;</span>[<span class="number">1</span>, <span class="number">2</span>]);
<span class="macro">assert_eq!</span>(iter.next().unwrap(), <span class="kw-2">&amp;</span>[<span class="number">2</span>, <span class="number">3</span>]);
<span class="macro">assert!</span>(iter.next().is_none());</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.rchunks" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.31.0">1.31.0</span> · <a class="src" href="https://doc.rust-lang.org/1.83.0/src/core/slice/mod.rs.html#1627">source</a></span><h4 class="code-header">pub fn <a href="#method.rchunks" class="fn">rchunks</a>(&amp;self, chunk_size: <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.usize.html">usize</a>) -&gt; <a class="struct" href="https://doc.rust-lang.org/1.83.0/core/slice/iter/struct.RChunks.html" title="struct core::slice::iter::RChunks">RChunks</a>&lt;'_, T&gt;</h4></section></summary><div class="docblock"><p>Returns an iterator over <code>chunk_size</code> elements of the slice at a time, starting at the end
of the slice.</p>
<p>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="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html#method.rchunks_exact" title="method slice::rchunks_exact"><code>rchunks_exact</code></a> for a variant of this iterator that returns chunks of always exactly
<code>chunk_size</code> elements, and <a href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html#method.chunks" title="method slice::chunks"><code>chunks</code></a> for the same iterator but starting at the beginning
of the slice.</p>
<h5 id="panics-7"><a class="doc-anchor" href="#panics-7">§</a>Panics</h5>
<p>Panics if <code>chunk_size</code> is 0.</p>
<h5 id="examples-32"><a class="doc-anchor" href="#examples-32">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>slice = [<span class="string">'l'</span>, <span class="string">'o'</span>, <span class="string">'r'</span>, <span class="string">'e'</span>, <span class="string">'m'</span>];
<span class="kw">let </span><span class="kw-2">mut </span>iter = slice.rchunks(<span class="number">2</span>);
<span class="macro">assert_eq!</span>(iter.next().unwrap(), <span class="kw-2">&amp;</span>[<span class="string">'e'</span>, <span class="string">'m'</span>]);
<span class="macro">assert_eq!</span>(iter.next().unwrap(), <span class="kw-2">&amp;</span>[<span class="string">'o'</span>, <span class="string">'r'</span>]);
<span class="macro">assert_eq!</span>(iter.next().unwrap(), <span class="kw-2">&amp;</span>[<span class="string">'l'</span>]);
<span class="macro">assert!</span>(iter.next().is_none());</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.rchunks_exact" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.31.0">1.31.0</span> · <a class="src" href="https://doc.rust-lang.org/1.83.0/src/core/slice/mod.rs.html#1706">source</a></span><h4 class="code-header">pub fn <a href="#method.rchunks_exact" class="fn">rchunks_exact</a>(&amp;self, chunk_size: <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.usize.html">usize</a>) -&gt; <a class="struct" href="https://doc.rust-lang.org/1.83.0/core/slice/iter/struct.RChunksExact.html" title="struct core::slice::iter::RChunksExact">RChunksExact</a>&lt;'_, T&gt;</h4></section></summary><div class="docblock"><p>Returns an iterator over <code>chunk_size</code> elements of the slice at a time, starting at the
end of the slice.</p>
<p>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 and can be retrieved
from the <code>remainder</code> function of the iterator.</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="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html#method.rchunks" title="method slice::rchunks"><code>rchunks</code></a>.</p>
<p>See <a href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html#method.rchunks" title="method slice::rchunks"><code>rchunks</code></a> for a variant of this iterator that also returns the remainder as a smaller
chunk, and <a href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html#method.chunks_exact" title="method slice::chunks_exact"><code>chunks_exact</code></a> for the same iterator but starting at the beginning of the
slice.</p>
<h5 id="panics-8"><a class="doc-anchor" href="#panics-8">§</a>Panics</h5>
<p>Panics if <code>chunk_size</code> is 0.</p>
<h5 id="examples-33"><a class="doc-anchor" href="#examples-33">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>slice = [<span class="string">'l'</span>, <span class="string">'o'</span>, <span class="string">'r'</span>, <span class="string">'e'</span>, <span class="string">'m'</span>];
<span class="kw">let </span><span class="kw-2">mut </span>iter = slice.rchunks_exact(<span class="number">2</span>);
<span class="macro">assert_eq!</span>(iter.next().unwrap(), <span class="kw-2">&amp;</span>[<span class="string">'e'</span>, <span class="string">'m'</span>]);
<span class="macro">assert_eq!</span>(iter.next().unwrap(), <span class="kw-2">&amp;</span>[<span class="string">'o'</span>, <span class="string">'r'</span>]);
<span class="macro">assert!</span>(iter.next().is_none());
<span class="macro">assert_eq!</span>(iter.remainder(), <span class="kw-2">&amp;</span>[<span class="string">'l'</span>]);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.chunk_by" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.77.0">1.77.0</span> · <a class="src" href="https://doc.rust-lang.org/1.83.0/src/core/slice/mod.rs.html#1789-1791">source</a></span><h4 class="code-header">pub fn <a href="#method.chunk_by" class="fn">chunk_by</a>&lt;F&gt;(&amp;self, pred: F) -&gt; <a class="struct" href="https://doc.rust-lang.org/1.83.0/core/slice/iter/struct.ChunkBy.html" title="struct core::slice::iter::ChunkBy">ChunkBy</a>&lt;'_, T, F&gt;<div class="where">where
F: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.reference.html">&amp;T</a>, <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.reference.html">&amp;T</a>) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.bool.html">bool</a>,</div></h4></section></summary><div class="docblock"><p>Returns an iterator over the slice producing non-overlapping runs
of elements using the predicate to separate them.</p>
<p>The predicate is called for every pair of consecutive elements,
meaning that it is called on <code>slice[0]</code> and <code>slice[1]</code>,
followed by <code>slice[1]</code> and <code>slice[2]</code>, and so on.</p>
<h5 id="examples-34"><a class="doc-anchor" href="#examples-34">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>slice = <span class="kw-2">&amp;</span>[<span class="number">1</span>, <span class="number">1</span>, <span class="number">1</span>, <span class="number">3</span>, <span class="number">3</span>, <span class="number">2</span>, <span class="number">2</span>, <span class="number">2</span>];
<span class="kw">let </span><span class="kw-2">mut </span>iter = slice.chunk_by(|a, b| a == b);
<span class="macro">assert_eq!</span>(iter.next(), <span class="prelude-val">Some</span>(<span class="kw-2">&amp;</span>[<span class="number">1</span>, <span class="number">1</span>, <span class="number">1</span>][..]));
<span class="macro">assert_eq!</span>(iter.next(), <span class="prelude-val">Some</span>(<span class="kw-2">&amp;</span>[<span class="number">3</span>, <span class="number">3</span>][..]));
<span class="macro">assert_eq!</span>(iter.next(), <span class="prelude-val">Some</span>(<span class="kw-2">&amp;</span>[<span class="number">2</span>, <span class="number">2</span>, <span class="number">2</span>][..]));
<span class="macro">assert_eq!</span>(iter.next(), <span class="prelude-val">None</span>);</code></pre></div>
<p>This method can be used to extract the sorted subslices:</p>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>slice = <span class="kw-2">&amp;</span>[<span class="number">1</span>, <span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>, <span class="number">2</span>, <span class="number">3</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>iter = slice.chunk_by(|a, b| a &lt;= b);
<span class="macro">assert_eq!</span>(iter.next(), <span class="prelude-val">Some</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">3</span>][..]));
<span class="macro">assert_eq!</span>(iter.next(), <span class="prelude-val">Some</span>(<span class="kw-2">&amp;</span>[<span class="number">2</span>, <span class="number">3</span>][..]));
<span class="macro">assert_eq!</span>(iter.next(), <span class="prelude-val">Some</span>(<span class="kw-2">&amp;</span>[<span class="number">2</span>, <span class="number">3</span>, <span class="number">4</span>][..]));
<span class="macro">assert_eq!</span>(iter.next(), <span class="prelude-val">None</span>);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.split_at" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="src" href="https://doc.rust-lang.org/1.83.0/src/core/slice/mod.rs.html#1877">source</a></span><h4 class="code-header">pub fn <a href="#method.split_at" class="fn">split_at</a>(&amp;self, mid: <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.usize.html">usize</a>) -&gt; (&amp;<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html">[T]</a>, &amp;<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html">[T]</a>)</h4></section></summary><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>
<h5 id="panics-9"><a class="doc-anchor" href="#panics-9">§</a>Panics</h5>
<p>Panics if <code>mid &gt; len</code>. For a non-panicking alternative see
<a href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html#method.split_at_checked" title="method slice::split_at_checked"><code>split_at_checked</code></a>.</p>
<h5 id="examples-35"><a class="doc-anchor" href="#examples-35">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>v = [<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>(left, right) = v.split_at(<span class="number">0</span>);
<span class="macro">assert_eq!</span>(left, []);
<span class="macro">assert_eq!</span>(right, [<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>(left, right) = v.split_at(<span class="number">2</span>);
<span class="macro">assert_eq!</span>(left, [<span class="number">1</span>, <span class="number">2</span>]);
<span class="macro">assert_eq!</span>(right, [<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>(left, right) = v.split_at(<span class="number">6</span>);
<span class="macro">assert_eq!</span>(left, [<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_eq!</span>(right, []);
}</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.split_at_unchecked" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.79.0">1.79.0</span> · <a class="src" href="https://doc.rust-lang.org/1.83.0/src/core/slice/mod.rs.html#1963">source</a></span><h4 class="code-header">pub unsafe fn <a href="#method.split_at_unchecked" class="fn">split_at_unchecked</a>(&amp;self, mid: <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.usize.html">usize</a>) -&gt; (&amp;<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html">[T]</a>, &amp;<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html">[T]</a>)</h4></section></summary><div class="docblock"><p>Divides one slice into two at an index, without doing bounds checking.</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>
<p>For a safe alternative see <a href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html#method.split_at" title="method slice::split_at"><code>split_at</code></a>.</p>
<h5 id="safety-3"><a class="doc-anchor" href="#safety-3">§</a>Safety</h5>
<p>Calling this method with an out-of-bounds index is <em><a href="https://doc.rust-lang.org/reference/behavior-considered-undefined.html">undefined behavior</a></em>
even if the resulting reference is not used. The caller has to ensure that
<code>0 &lt;= mid &lt;= self.len()</code>.</p>
<h5 id="examples-36"><a class="doc-anchor" href="#examples-36">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>v = [<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">unsafe </span>{
<span class="kw">let </span>(left, right) = v.split_at_unchecked(<span class="number">0</span>);
<span class="macro">assert_eq!</span>(left, []);
<span class="macro">assert_eq!</span>(right, [<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">unsafe </span>{
<span class="kw">let </span>(left, right) = v.split_at_unchecked(<span class="number">2</span>);
<span class="macro">assert_eq!</span>(left, [<span class="number">1</span>, <span class="number">2</span>]);
<span class="macro">assert_eq!</span>(right, [<span class="number">3</span>, <span class="number">4</span>, <span class="number">5</span>, <span class="number">6</span>]);
}
<span class="kw">unsafe </span>{
<span class="kw">let </span>(left, right) = v.split_at_unchecked(<span class="number">6</span>);
<span class="macro">assert_eq!</span>(left, [<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_eq!</span>(right, []);
}</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.split_at_checked" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.80.0">1.80.0</span> · <a class="src" href="https://doc.rust-lang.org/1.83.0/src/core/slice/mod.rs.html#2078">source</a></span><h4 class="code-header">pub fn <a href="#method.split_at_checked" class="fn">split_at_checked</a>(&amp;self, mid: <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.usize.html">usize</a>) -&gt; <a class="enum" href="https://doc.rust-lang.org/1.83.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a>&lt;(&amp;<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html">[T]</a>, &amp;<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html">[T]</a>)&gt;</h4></section></summary><div class="docblock"><p>Divides one slice into two at an index, returning <code>None</code> if the slice is
too short.</p>
<p>If <code>mid ≤ len</code> returns a pair of slices where 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>
<p>Otherwise, if <code>mid &gt; len</code>, returns <code>None</code>.</p>
<h5 id="examples-37"><a class="doc-anchor" href="#examples-37">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>v = [<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>(left, right) = v.split_at_checked(<span class="number">0</span>).unwrap();
<span class="macro">assert_eq!</span>(left, []);
<span class="macro">assert_eq!</span>(right, [<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>(left, right) = v.split_at_checked(<span class="number">2</span>).unwrap();
<span class="macro">assert_eq!</span>(left, [<span class="number">1</span>, -<span class="number">2</span>]);
<span class="macro">assert_eq!</span>(right, [<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>(left, right) = v.split_at_checked(<span class="number">6</span>).unwrap();
<span class="macro">assert_eq!</span>(left, [<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_eq!</span>(right, []);
}
<span class="macro">assert_eq!</span>(<span class="prelude-val">None</span>, v.split_at_checked(<span class="number">7</span>));</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.split" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="src" href="https://doc.rust-lang.org/1.83.0/src/core/slice/mod.rs.html#2170-2172">source</a></span><h4 class="code-header">pub fn <a href="#method.split" class="fn">split</a>&lt;F&gt;(&amp;self, pred: F) -&gt; <a class="struct" href="https://doc.rust-lang.org/1.83.0/core/slice/iter/struct.Split.html" title="struct core::slice::iter::Split">Split</a>&lt;'_, T, F&gt;<div class="where">where
F: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.reference.html">&amp;T</a>) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.bool.html">bool</a>,</div></h4></section></summary><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>
<h5 id="examples-38"><a class="doc-anchor" href="#examples-38">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>slice = [<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>iter = slice.split(|num| num % <span class="number">3 </span>== <span class="number">0</span>);
<span class="macro">assert_eq!</span>(iter.next().unwrap(), <span class="kw-2">&amp;</span>[<span class="number">10</span>, <span class="number">40</span>]);
<span class="macro">assert_eq!</span>(iter.next().unwrap(), <span class="kw-2">&amp;</span>[<span class="number">20</span>]);
<span class="macro">assert!</span>(iter.next().is_none());</code></pre></div>
<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>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>slice = [<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>iter = slice.split(|num| num % <span class="number">3 </span>== <span class="number">0</span>);
<span class="macro">assert_eq!</span>(iter.next().unwrap(), <span class="kw-2">&amp;</span>[<span class="number">10</span>, <span class="number">40</span>]);
<span class="macro">assert_eq!</span>(iter.next().unwrap(), <span class="kw-2">&amp;</span>[]);
<span class="macro">assert!</span>(iter.next().is_none());</code></pre></div>
<p>If two matched elements are directly adjacent, an empty slice will be
present between them:</p>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>slice = [<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>iter = slice.split(|num| num % <span class="number">3 </span>== <span class="number">0</span>);
<span class="macro">assert_eq!</span>(iter.next().unwrap(), <span class="kw-2">&amp;</span>[<span class="number">10</span>]);
<span class="macro">assert_eq!</span>(iter.next().unwrap(), <span class="kw-2">&amp;</span>[]);
<span class="macro">assert_eq!</span>(iter.next().unwrap(), <span class="kw-2">&amp;</span>[<span class="number">20</span>]);
<span class="macro">assert!</span>(iter.next().is_none());</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.split_inclusive" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.51.0">1.51.0</span> · <a class="src" href="https://doc.rust-lang.org/1.83.0/src/core/slice/mod.rs.html#2228-2230">source</a></span><h4 class="code-header">pub fn <a href="#method.split_inclusive" class="fn">split_inclusive</a>&lt;F&gt;(&amp;self, pred: F) -&gt; <a class="struct" href="https://doc.rust-lang.org/1.83.0/core/slice/iter/struct.SplitInclusive.html" title="struct core::slice::iter::SplitInclusive">SplitInclusive</a>&lt;'_, T, F&gt;<div class="where">where
F: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.reference.html">&amp;T</a>) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.bool.html">bool</a>,</div></h4></section></summary><div class="docblock"><p>Returns an iterator over subslices separated by elements that match
<code>pred</code>. The matched element is contained in the end of the previous
subslice as a terminator.</p>
<h5 id="examples-39"><a class="doc-anchor" href="#examples-39">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>slice = [<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>iter = slice.split_inclusive(|num| num % <span class="number">3 </span>== <span class="number">0</span>);
<span class="macro">assert_eq!</span>(iter.next().unwrap(), <span class="kw-2">&amp;</span>[<span class="number">10</span>, <span class="number">40</span>, <span class="number">33</span>]);
<span class="macro">assert_eq!</span>(iter.next().unwrap(), <span class="kw-2">&amp;</span>[<span class="number">20</span>]);
<span class="macro">assert!</span>(iter.next().is_none());</code></pre></div>
<p>If the last element of the slice is matched,
that element will be considered the terminator of the preceding slice.
That slice will be the last item returned by the iterator.</p>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>slice = [<span class="number">3</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>iter = slice.split_inclusive(|num| num % <span class="number">3 </span>== <span class="number">0</span>);
<span class="macro">assert_eq!</span>(iter.next().unwrap(), <span class="kw-2">&amp;</span>[<span class="number">3</span>]);
<span class="macro">assert_eq!</span>(iter.next().unwrap(), <span class="kw-2">&amp;</span>[<span class="number">10</span>, <span class="number">40</span>, <span class="number">33</span>]);
<span class="macro">assert!</span>(iter.next().is_none());</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.rsplit" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.27.0">1.27.0</span> · <a class="src" href="https://doc.rust-lang.org/1.83.0/src/core/slice/mod.rs.html#2288-2290">source</a></span><h4 class="code-header">pub fn <a href="#method.rsplit" class="fn">rsplit</a>&lt;F&gt;(&amp;self, pred: F) -&gt; <a class="struct" href="https://doc.rust-lang.org/1.83.0/core/slice/iter/struct.RSplit.html" title="struct core::slice::iter::RSplit">RSplit</a>&lt;'_, T, F&gt;<div class="where">where
F: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.reference.html">&amp;T</a>) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.bool.html">bool</a>,</div></h4></section></summary><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>
<h5 id="examples-40"><a class="doc-anchor" href="#examples-40">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>slice = [<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>iter = slice.rsplit(|num| <span class="kw-2">*</span>num == <span class="number">0</span>);
<span class="macro">assert_eq!</span>(iter.next().unwrap(), <span class="kw-2">&amp;</span>[<span class="number">44</span>, <span class="number">55</span>]);
<span class="macro">assert_eq!</span>(iter.next().unwrap(), <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>(iter.next(), <span class="prelude-val">None</span>);</code></pre></div>
<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>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>v = <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>it = v.rsplit(|n| <span class="kw-2">*</span>n % <span class="number">2 </span>== <span class="number">0</span>);
<span class="macro">assert_eq!</span>(it.next().unwrap(), <span class="kw-2">&amp;</span>[]);
<span class="macro">assert_eq!</span>(it.next().unwrap(), <span class="kw-2">&amp;</span>[<span class="number">3</span>, <span class="number">5</span>]);
<span class="macro">assert_eq!</span>(it.next().unwrap(), <span class="kw-2">&amp;</span>[<span class="number">1</span>, <span class="number">1</span>]);
<span class="macro">assert_eq!</span>(it.next().unwrap(), <span class="kw-2">&amp;</span>[]);
<span class="macro">assert_eq!</span>(it.next(), <span class="prelude-val">None</span>);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.splitn" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="src" href="https://doc.rust-lang.org/1.83.0/src/core/slice/mod.rs.html#2342-2344">source</a></span><h4 class="code-header">pub fn <a href="#method.splitn" class="fn">splitn</a>&lt;F&gt;(&amp;self, n: <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.usize.html">usize</a>, pred: F) -&gt; <a class="struct" href="https://doc.rust-lang.org/1.83.0/core/slice/iter/struct.SplitN.html" title="struct core::slice::iter::SplitN">SplitN</a>&lt;'_, T, F&gt;<div class="where">where
F: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.reference.html">&amp;T</a>) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.bool.html">bool</a>,</div></h4></section></summary><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>
<h5 id="examples-41"><a class="doc-anchor" href="#examples-41">§</a>Examples</h5>
<p>Print the slice split once by numbers divisible by 3 (i.e., <code>[10, 40]</code>,
<code>[20, 60, 50]</code>):</p>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>v = [<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>group <span class="kw">in </span>v.splitn(<span class="number">2</span>, |num| <span class="kw-2">*</span>num % <span class="number">3 </span>== <span class="number">0</span>) {
<span class="macro">println!</span>(<span class="string">"{group:?}"</span>);
}</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.rsplitn" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="src" href="https://doc.rust-lang.org/1.83.0/src/core/slice/mod.rs.html#2397-2399">source</a></span><h4 class="code-header">pub fn <a href="#method.rsplitn" class="fn">rsplitn</a>&lt;F&gt;(&amp;self, n: <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.usize.html">usize</a>, pred: F) -&gt; <a class="struct" href="https://doc.rust-lang.org/1.83.0/core/slice/iter/struct.RSplitN.html" title="struct core::slice::iter::RSplitN">RSplitN</a>&lt;'_, T, F&gt;<div class="where">where
F: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.reference.html">&amp;T</a>) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.bool.html">bool</a>,</div></h4></section></summary><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>
<h5 id="examples-42"><a class="doc-anchor" href="#examples-42">§</a>Examples</h5>
<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>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>v = [<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>group <span class="kw">in </span>v.rsplitn(<span class="number">2</span>, |num| <span class="kw-2">*</span>num % <span class="number">3 </span>== <span class="number">0</span>) {
<span class="macro">println!</span>(<span class="string">"{group:?}"</span>);
}</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.split_once" class="method"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/slice/mod.rs.html#2451-2453">source</a><h4 class="code-header">pub fn <a href="#method.split_once" class="fn">split_once</a>&lt;F&gt;(&amp;self, pred: F) -&gt; <a class="enum" href="https://doc.rust-lang.org/1.83.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a>&lt;(&amp;<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html">[T]</a>, &amp;<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html">[T]</a>)&gt;<div class="where">where
F: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.reference.html">&amp;T</a>) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.bool.html">bool</a>,</div></h4></section><span class="item-info"><div class="stab unstable"><span class="emoji">🔬</span><span>This is a nightly-only experimental API. (<code>slice_split_once</code>)</span></div></span></summary><div class="docblock"><p>Splits the slice on the first element that matches the specified
predicate.</p>
<p>If any matching elements are present in the slice, returns the prefix
before the match and suffix after. The matching element itself is not
included. If no elements match, returns <code>None</code>.</p>
<h5 id="examples-43"><a class="doc-anchor" href="#examples-43">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="attr">#![feature(slice_split_once)]
</span><span class="kw">let </span>s = [<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>, <span class="number">2</span>, <span class="number">4</span>];
<span class="macro">assert_eq!</span>(s.split_once(|<span class="kw-2">&amp;</span>x| x == <span class="number">2</span>), <span class="prelude-val">Some</span>((
<span class="kw-2">&amp;</span>[<span class="number">1</span>][..],
<span class="kw-2">&amp;</span>[<span class="number">3</span>, <span class="number">2</span>, <span class="number">4</span>][..]
)));
<span class="macro">assert_eq!</span>(s.split_once(|<span class="kw-2">&amp;</span>x| x == <span class="number">0</span>), <span class="prelude-val">None</span>);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.rsplit_once" class="method"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/slice/mod.rs.html#2479-2481">source</a><h4 class="code-header">pub fn <a href="#method.rsplit_once" class="fn">rsplit_once</a>&lt;F&gt;(&amp;self, pred: F) -&gt; <a class="enum" href="https://doc.rust-lang.org/1.83.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a>&lt;(&amp;<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html">[T]</a>, &amp;<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html">[T]</a>)&gt;<div class="where">where
F: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.reference.html">&amp;T</a>) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.bool.html">bool</a>,</div></h4></section><span class="item-info"><div class="stab unstable"><span class="emoji">🔬</span><span>This is a nightly-only experimental API. (<code>slice_split_once</code>)</span></div></span></summary><div class="docblock"><p>Splits the slice on the last element that matches the specified
predicate.</p>
<p>If any matching elements are present in the slice, returns the prefix
before the match and suffix after. The matching element itself is not
included. If no elements match, returns <code>None</code>.</p>
<h5 id="examples-44"><a class="doc-anchor" href="#examples-44">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="attr">#![feature(slice_split_once)]
</span><span class="kw">let </span>s = [<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>, <span class="number">2</span>, <span class="number">4</span>];
<span class="macro">assert_eq!</span>(s.rsplit_once(|<span class="kw-2">&amp;</span>x| x == <span class="number">2</span>), <span class="prelude-val">Some</span>((
<span class="kw-2">&amp;</span>[<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>][..],
<span class="kw-2">&amp;</span>[<span class="number">4</span>][..]
)));
<span class="macro">assert_eq!</span>(s.rsplit_once(|<span class="kw-2">&amp;</span>x| x == <span class="number">0</span>), <span class="prelude-val">None</span>);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.contains" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="src" href="https://doc.rust-lang.org/1.83.0/src/core/slice/mod.rs.html#2515-2517">source</a></span><h4 class="code-header">pub fn <a href="#method.contains" class="fn">contains</a>(&amp;self, x: <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.reference.html">&amp;T</a>) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.bool.html">bool</a><div class="where">where
T: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/cmp/trait.PartialEq.html" title="trait core::cmp::PartialEq">PartialEq</a>,</div></h4></section></summary><div class="docblock"><p>Returns <code>true</code> if the slice contains an element with the given value.</p>
<p>This operation is <em>O</em>(<em>n</em>).</p>
<p>Note that if you have a sorted slice, <a href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html#method.binary_search" title="method slice::binary_search"><code>binary_search</code></a> may be faster.</p>
<h5 id="examples-45"><a class="doc-anchor" href="#examples-45">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>v = [<span class="number">10</span>, <span class="number">40</span>, <span class="number">30</span>];
<span class="macro">assert!</span>(v.contains(<span class="kw-2">&amp;</span><span class="number">30</span>));
<span class="macro">assert!</span>(!v.contains(<span class="kw-2">&amp;</span><span class="number">50</span>));</code></pre></div>
<p>If you do not have a <code>&amp;T</code>, but some other value that you can compare
with one (for example, <code>String</code> implements <code>PartialEq&lt;str&gt;</code>), you can
use <code>iter().any</code>:</p>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>v = [String::from(<span class="string">"hello"</span>), String::from(<span class="string">"world"</span>)]; <span class="comment">// slice of `String`
</span><span class="macro">assert!</span>(v.iter().any(|e| e == <span class="string">"hello"</span>)); <span class="comment">// search with `&amp;str`
</span><span class="macro">assert!</span>(!v.iter().any(|e| e == <span class="string">"hi"</span>));</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.starts_with" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="src" href="https://doc.rust-lang.org/1.83.0/src/core/slice/mod.rs.html#2545-2547">source</a></span><h4 class="code-header">pub fn <a href="#method.starts_with" class="fn">starts_with</a>(&amp;self, needle: &amp;<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html">[T]</a>) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.bool.html">bool</a><div class="where">where
T: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/cmp/trait.PartialEq.html" title="trait core::cmp::PartialEq">PartialEq</a>,</div></h4></section></summary><div class="docblock"><p>Returns <code>true</code> if <code>needle</code> is a prefix of the slice or equal to the slice.</p>
<h5 id="examples-46"><a class="doc-anchor" href="#examples-46">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>v = [<span class="number">10</span>, <span class="number">40</span>, <span class="number">30</span>];
<span class="macro">assert!</span>(v.starts_with(<span class="kw-2">&amp;</span>[<span class="number">10</span>]));
<span class="macro">assert!</span>(v.starts_with(<span class="kw-2">&amp;</span>[<span class="number">10</span>, <span class="number">40</span>]));
<span class="macro">assert!</span>(v.starts_with(<span class="kw-2">&amp;</span>v));
<span class="macro">assert!</span>(!v.starts_with(<span class="kw-2">&amp;</span>[<span class="number">50</span>]));
<span class="macro">assert!</span>(!v.starts_with(<span class="kw-2">&amp;</span>[<span class="number">10</span>, <span class="number">50</span>]));</code></pre></div>
<p>Always returns <code>true</code> if <code>needle</code> is an empty slice:</p>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>v = <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>(v.starts_with(<span class="kw-2">&amp;</span>[]));
<span class="kw">let </span>v: <span class="kw-2">&amp;</span>[u8] = <span class="kw-2">&amp;</span>[];
<span class="macro">assert!</span>(v.starts_with(<span class="kw-2">&amp;</span>[]));</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.ends_with" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="src" href="https://doc.rust-lang.org/1.83.0/src/core/slice/mod.rs.html#2576-2578">source</a></span><h4 class="code-header">pub fn <a href="#method.ends_with" class="fn">ends_with</a>(&amp;self, needle: &amp;<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html">[T]</a>) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.bool.html">bool</a><div class="where">where
T: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/cmp/trait.PartialEq.html" title="trait core::cmp::PartialEq">PartialEq</a>,</div></h4></section></summary><div class="docblock"><p>Returns <code>true</code> if <code>needle</code> is a suffix of the slice or equal to the slice.</p>
<h5 id="examples-47"><a class="doc-anchor" href="#examples-47">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>v = [<span class="number">10</span>, <span class="number">40</span>, <span class="number">30</span>];
<span class="macro">assert!</span>(v.ends_with(<span class="kw-2">&amp;</span>[<span class="number">30</span>]));
<span class="macro">assert!</span>(v.ends_with(<span class="kw-2">&amp;</span>[<span class="number">40</span>, <span class="number">30</span>]));
<span class="macro">assert!</span>(v.ends_with(<span class="kw-2">&amp;</span>v));
<span class="macro">assert!</span>(!v.ends_with(<span class="kw-2">&amp;</span>[<span class="number">50</span>]));
<span class="macro">assert!</span>(!v.ends_with(<span class="kw-2">&amp;</span>[<span class="number">50</span>, <span class="number">30</span>]));</code></pre></div>
<p>Always returns <code>true</code> if <code>needle</code> is an empty slice:</p>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>v = <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>(v.ends_with(<span class="kw-2">&amp;</span>[]));
<span class="kw">let </span>v: <span class="kw-2">&amp;</span>[u8] = <span class="kw-2">&amp;</span>[];
<span class="macro">assert!</span>(v.ends_with(<span class="kw-2">&amp;</span>[]));</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.strip_prefix" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.51.0">1.51.0</span> · <a class="src" href="https://doc.rust-lang.org/1.83.0/src/core/slice/mod.rs.html#2608-2610">source</a></span><h4 class="code-header">pub fn <a href="#method.strip_prefix" class="fn">strip_prefix</a>&lt;P&gt;(&amp;self, prefix: <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.reference.html">&amp;P</a>) -&gt; <a class="enum" href="https://doc.rust-lang.org/1.83.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a>&lt;&amp;<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html">[T]</a>&gt;<div class="where">where
P: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/slice/trait.SlicePattern.html" title="trait core::slice::SlicePattern">SlicePattern</a>&lt;Item = T&gt; + ?<a class="trait" href="https://doc.rust-lang.org/1.83.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,
T: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/cmp/trait.PartialEq.html" title="trait core::cmp::PartialEq">PartialEq</a>,</div></h4></section></summary><div class="docblock"><p>Returns a subslice with the prefix removed.</p>
<p>If the slice starts with <code>prefix</code>, returns the subslice after the prefix, wrapped in <code>Some</code>.
If <code>prefix</code> is empty, simply returns the original slice. If <code>prefix</code> is equal to the
original slice, returns an empty slice.</p>
<p>If the slice does not start with <code>prefix</code>, returns <code>None</code>.</p>
<h5 id="examples-48"><a class="doc-anchor" href="#examples-48">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>v = <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_eq!</span>(v.strip_prefix(<span class="kw-2">&amp;</span>[<span class="number">10</span>]), <span class="prelude-val">Some</span>(<span class="kw-2">&amp;</span>[<span class="number">40</span>, <span class="number">30</span>][..]));
<span class="macro">assert_eq!</span>(v.strip_prefix(<span class="kw-2">&amp;</span>[<span class="number">10</span>, <span class="number">40</span>]), <span class="prelude-val">Some</span>(<span class="kw-2">&amp;</span>[<span class="number">30</span>][..]));
<span class="macro">assert_eq!</span>(v.strip_prefix(<span class="kw-2">&amp;</span>[<span class="number">10</span>, <span class="number">40</span>, <span class="number">30</span>]), <span class="prelude-val">Some</span>(<span class="kw-2">&amp;</span>[][..]));
<span class="macro">assert_eq!</span>(v.strip_prefix(<span class="kw-2">&amp;</span>[<span class="number">50</span>]), <span class="prelude-val">None</span>);
<span class="macro">assert_eq!</span>(v.strip_prefix(<span class="kw-2">&amp;</span>[<span class="number">10</span>, <span class="number">50</span>]), <span class="prelude-val">None</span>);
<span class="kw">let </span>prefix : <span class="kw-2">&amp;</span>str = <span class="string">"he"</span>;
<span class="macro">assert_eq!</span>(<span class="string">b"hello"</span>.strip_prefix(prefix.as_bytes()),
<span class="prelude-val">Some</span>(<span class="string">b"llo"</span>.as_ref()));</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.strip_suffix" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.51.0">1.51.0</span> · <a class="src" href="https://doc.rust-lang.org/1.83.0/src/core/slice/mod.rs.html#2644-2646">source</a></span><h4 class="code-header">pub fn <a href="#method.strip_suffix" class="fn">strip_suffix</a>&lt;P&gt;(&amp;self, suffix: <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.reference.html">&amp;P</a>) -&gt; <a class="enum" href="https://doc.rust-lang.org/1.83.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a>&lt;&amp;<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html">[T]</a>&gt;<div class="where">where
P: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/slice/trait.SlicePattern.html" title="trait core::slice::SlicePattern">SlicePattern</a>&lt;Item = T&gt; + ?<a class="trait" href="https://doc.rust-lang.org/1.83.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,
T: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/cmp/trait.PartialEq.html" title="trait core::cmp::PartialEq">PartialEq</a>,</div></h4></section></summary><div class="docblock"><p>Returns a subslice with the suffix removed.</p>
<p>If the slice ends with <code>suffix</code>, returns the subslice before the suffix, wrapped in <code>Some</code>.
If <code>suffix</code> is empty, simply returns the original slice. If <code>suffix</code> is equal to the
original slice, returns an empty slice.</p>
<p>If the slice does not end with <code>suffix</code>, returns <code>None</code>.</p>
<h5 id="examples-49"><a class="doc-anchor" href="#examples-49">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>v = <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_eq!</span>(v.strip_suffix(<span class="kw-2">&amp;</span>[<span class="number">30</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="macro">assert_eq!</span>(v.strip_suffix(<span class="kw-2">&amp;</span>[<span class="number">40</span>, <span class="number">30</span>]), <span class="prelude-val">Some</span>(<span class="kw-2">&amp;</span>[<span class="number">10</span>][..]));
<span class="macro">assert_eq!</span>(v.strip_suffix(<span class="kw-2">&amp;</span>[<span class="number">10</span>, <span class="number">40</span>, <span class="number">30</span>]), <span class="prelude-val">Some</span>(<span class="kw-2">&amp;</span>[][..]));
<span class="macro">assert_eq!</span>(v.strip_suffix(<span class="kw-2">&amp;</span>[<span class="number">50</span>]), <span class="prelude-val">None</span>);
<span class="macro">assert_eq!</span>(v.strip_suffix(<span class="kw-2">&amp;</span>[<span class="number">50</span>, <span class="number">30</span>]), <span class="prelude-val">None</span>);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.binary_search" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="src" href="https://doc.rust-lang.org/1.83.0/src/core/slice/mod.rs.html#2730-2732">source</a></span><h4 class="code-header">pub fn <a href="#method.binary_search" class="fn">binary_search</a>(&amp;self, x: <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.reference.html">&amp;T</a>) -&gt; <a class="enum" href="https://doc.rust-lang.org/1.83.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.usize.html">usize</a>, <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.usize.html">usize</a>&gt;<div class="where">where
T: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/cmp/trait.Ord.html" title="trait core::cmp::Ord">Ord</a>,</div></h4></section></summary><div class="docblock"><p>Binary searches this slice for a given element.
If the slice is not sorted, the returned result is unspecified and
meaningless.</p>
<p>If the value is found then <a href="https://doc.rust-lang.org/1.83.0/core/result/enum.Result.html#variant.Ok" title="variant core::result::Result::Ok"><code>Result::Ok</code></a> is returned, containing the
index of the matching element. If there are multiple matches, then any
one of the matches could be returned. The index is chosen
deterministically, but is subject to change in future versions of Rust.
If the value is not found then <a href="https://doc.rust-lang.org/1.83.0/core/result/enum.Result.html#variant.Err" title="variant core::result::Result::Err"><code>Result::Err</code></a> is returned, containing
the index where a matching element could be inserted while maintaining
sorted order.</p>
<p>See also <a href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html#method.binary_search_by" title="method slice::binary_search_by"><code>binary_search_by</code></a>, <a href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html#method.binary_search_by_key" title="method slice::binary_search_by_key"><code>binary_search_by_key</code></a>, and <a href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html#method.partition_point" title="method slice::partition_point"><code>partition_point</code></a>.</p>
<h5 id="examples-50"><a class="doc-anchor" href="#examples-50">§</a>Examples</h5>
<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>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>s = [<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>(s.binary_search(<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>(s.binary_search(<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>(s.binary_search(<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>r = s.binary_search(<span class="kw-2">&amp;</span><span class="number">1</span>);
<span class="macro">assert!</span>(<span class="kw">match </span>r { <span class="prelude-val">Ok</span>(<span class="number">1</span>..=<span class="number">4</span>) =&gt; <span class="bool-val">true</span>, <span class="kw">_ </span>=&gt; <span class="bool-val">false</span>, });</code></pre></div>
<p>If you want to find that whole <em>range</em> of matching items, rather than
an arbitrary matching one, that can be done using <a href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html#method.partition_point" title="method slice::partition_point"><code>partition_point</code></a>:</p>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>s = [<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>low = s.partition_point(|x| x &lt; <span class="kw-2">&amp;</span><span class="number">1</span>);
<span class="macro">assert_eq!</span>(low, <span class="number">1</span>);
<span class="kw">let </span>high = s.partition_point(|x| x &lt;= <span class="kw-2">&amp;</span><span class="number">1</span>);
<span class="macro">assert_eq!</span>(high, <span class="number">5</span>);
<span class="kw">let </span>r = s.binary_search(<span class="kw-2">&amp;</span><span class="number">1</span>);
<span class="macro">assert!</span>((low..high).contains(<span class="kw-2">&amp;</span>r.unwrap()));
<span class="macro">assert!</span>(s[..low].iter().all(|<span class="kw-2">&amp;</span>x| x &lt; <span class="number">1</span>));
<span class="macro">assert!</span>(s[low..high].iter().all(|<span class="kw-2">&amp;</span>x| x == <span class="number">1</span>));
<span class="macro">assert!</span>(s[high..].iter().all(|<span class="kw-2">&amp;</span>x| x &gt; <span class="number">1</span>));
<span class="comment">// For something not found, the "range" of equal items is empty
</span><span class="macro">assert_eq!</span>(s.partition_point(|x| x &lt; <span class="kw-2">&amp;</span><span class="number">11</span>), <span class="number">9</span>);
<span class="macro">assert_eq!</span>(s.partition_point(|x| x &lt;= <span class="kw-2">&amp;</span><span class="number">11</span>), <span class="number">9</span>);
<span class="macro">assert_eq!</span>(s.binary_search(<span class="kw-2">&amp;</span><span class="number">11</span>), <span class="prelude-val">Err</span>(<span class="number">9</span>));</code></pre></div>
<p>If you want to insert an item to a sorted vector, while maintaining
sort order, consider using <a href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html#method.partition_point" title="method slice::partition_point"><code>partition_point</code></a>:</p>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span><span class="kw-2">mut </span>s = <span class="macro">vec!</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>num = <span class="number">42</span>;
<span class="kw">let </span>idx = s.partition_point(|<span class="kw-2">&amp;</span>x| x &lt;= num);
<span class="comment">// If `num` is unique, `s.partition_point(|&amp;x| x &lt; num)` (with `&lt;`) is equivalent to
// `s.binary_search(&amp;num).unwrap_or_else(|x| x)`, but using `&lt;=` will allow `insert`
// to shift less elements.
</span>s.insert(idx, num);
<span class="macro">assert_eq!</span>(s, [<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">42</span>, <span class="number">55</span>]);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.binary_search_by" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="src" href="https://doc.rust-lang.org/1.83.0/src/core/slice/mod.rs.html#2781-2783">source</a></span><h4 class="code-header">pub fn <a href="#method.binary_search_by" class="fn">binary_search_by</a>&lt;'a, F&gt;(&amp;'a self, f: F) -&gt; <a class="enum" href="https://doc.rust-lang.org/1.83.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.usize.html">usize</a>, <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.usize.html">usize</a>&gt;<div class="where">where
F: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.reference.html">&amp;'a T</a>) -&gt; <a class="enum" href="https://doc.rust-lang.org/1.83.0/core/cmp/enum.Ordering.html" title="enum core::cmp::Ordering">Ordering</a>,</div></h4></section></summary><div class="docblock"><p>Binary searches this slice with a comparator function.</p>
<p>The comparator function should return an order code that indicates
whether its argument is <code>Less</code>, <code>Equal</code> or <code>Greater</code> the desired
target.
If the slice is not sorted or if the comparator function does not
implement an order consistent with the sort order of the underlying
slice, the returned result is unspecified and meaningless.</p>
<p>If the value is found then <a href="https://doc.rust-lang.org/1.83.0/core/result/enum.Result.html#variant.Ok" title="variant core::result::Result::Ok"><code>Result::Ok</code></a> is returned, containing the
index of the matching element. If there are multiple matches, then any
one of the matches could be returned. The index is chosen
deterministically, but is subject to change in future versions of Rust.
If the value is not found then <a href="https://doc.rust-lang.org/1.83.0/core/result/enum.Result.html#variant.Err" title="variant core::result::Result::Err"><code>Result::Err</code></a> is returned, containing
the index where a matching element could be inserted while maintaining
sorted order.</p>
<p>See also <a href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html#method.binary_search" title="method slice::binary_search"><code>binary_search</code></a>, <a href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html#method.binary_search_by_key" title="method slice::binary_search_by_key"><code>binary_search_by_key</code></a>, and <a href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html#method.partition_point" title="method slice::partition_point"><code>partition_point</code></a>.</p>
<h5 id="examples-51"><a class="doc-anchor" href="#examples-51">§</a>Examples</h5>
<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>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>s = [<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>seek = <span class="number">13</span>;
<span class="macro">assert_eq!</span>(s.binary_search_by(|probe| probe.cmp(<span class="kw-2">&amp;</span>seek)), <span class="prelude-val">Ok</span>(<span class="number">9</span>));
<span class="kw">let </span>seek = <span class="number">4</span>;
<span class="macro">assert_eq!</span>(s.binary_search_by(|probe| probe.cmp(<span class="kw-2">&amp;</span>seek)), <span class="prelude-val">Err</span>(<span class="number">7</span>));
<span class="kw">let </span>seek = <span class="number">100</span>;
<span class="macro">assert_eq!</span>(s.binary_search_by(|probe| probe.cmp(<span class="kw-2">&amp;</span>seek)), <span class="prelude-val">Err</span>(<span class="number">13</span>));
<span class="kw">let </span>seek = <span class="number">1</span>;
<span class="kw">let </span>r = s.binary_search_by(|probe| probe.cmp(<span class="kw-2">&amp;</span>seek));
<span class="macro">assert!</span>(<span class="kw">match </span>r { <span class="prelude-val">Ok</span>(<span class="number">1</span>..=<span class="number">4</span>) =&gt; <span class="bool-val">true</span>, <span class="kw">_ </span>=&gt; <span class="bool-val">false</span>, });</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.binary_search_by_key" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.10.0">1.10.0</span> · <a class="src" href="https://doc.rust-lang.org/1.83.0/src/core/slice/mod.rs.html#2882-2885">source</a></span><h4 class="code-header">pub fn <a href="#method.binary_search_by_key" class="fn">binary_search_by_key</a>&lt;'a, B, F&gt;(
&amp;'a self,
b: <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.reference.html">&amp;B</a>,
f: F,
) -&gt; <a class="enum" href="https://doc.rust-lang.org/1.83.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.usize.html">usize</a>, <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.usize.html">usize</a>&gt;<div class="where">where
F: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.reference.html">&amp;'a T</a>) -&gt; B,
B: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/cmp/trait.Ord.html" title="trait core::cmp::Ord">Ord</a>,</div></h4></section></summary><div class="docblock"><p>Binary searches this slice with a key extraction function.</p>
<p>Assumes that the slice is sorted by the key, for instance with
<a href="slice::sort_by_key"><code>sort_by_key</code></a> using the same key extraction function.
If the slice is not sorted by the key, the returned result is
unspecified and meaningless.</p>
<p>If the value is found then <a href="https://doc.rust-lang.org/1.83.0/core/result/enum.Result.html#variant.Ok" title="variant core::result::Result::Ok"><code>Result::Ok</code></a> is returned, containing the
index of the matching element. If there are multiple matches, then any
one of the matches could be returned. The index is chosen
deterministically, but is subject to change in future versions of Rust.
If the value is not found then <a href="https://doc.rust-lang.org/1.83.0/core/result/enum.Result.html#variant.Err" title="variant core::result::Result::Err"><code>Result::Err</code></a> is returned, containing
the index where a matching element could be inserted while maintaining
sorted order.</p>
<p>See also <a href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html#method.binary_search" title="method slice::binary_search"><code>binary_search</code></a>, <a href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html#method.binary_search_by" title="method slice::binary_search_by"><code>binary_search_by</code></a>, and <a href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html#method.partition_point" title="method slice::partition_point"><code>partition_point</code></a>.</p>
<h5 id="examples-52"><a class="doc-anchor" href="#examples-52">§</a>Examples</h5>
<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>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>s = [(<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>(s.binary_search_by_key(<span class="kw-2">&amp;</span><span class="number">13</span>, |<span class="kw-2">&amp;</span>(a, b)| b), <span class="prelude-val">Ok</span>(<span class="number">9</span>));
<span class="macro">assert_eq!</span>(s.binary_search_by_key(<span class="kw-2">&amp;</span><span class="number">4</span>, |<span class="kw-2">&amp;</span>(a, b)| b), <span class="prelude-val">Err</span>(<span class="number">7</span>));
<span class="macro">assert_eq!</span>(s.binary_search_by_key(<span class="kw-2">&amp;</span><span class="number">100</span>, |<span class="kw-2">&amp;</span>(a, b)| b), <span class="prelude-val">Err</span>(<span class="number">13</span>));
<span class="kw">let </span>r = s.binary_search_by_key(<span class="kw-2">&amp;</span><span class="number">1</span>, |<span class="kw-2">&amp;</span>(a, b)| b);
<span class="macro">assert!</span>(<span class="kw">match </span>r { <span class="prelude-val">Ok</span>(<span class="number">1</span>..=<span class="number">4</span>) =&gt; <span class="bool-val">true</span>, <span class="kw">_ </span>=&gt; <span class="bool-val">false</span>, });</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.align_to" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.30.0">1.30.0</span> · <a class="src" href="https://doc.rust-lang.org/1.83.0/src/core/slice/mod.rs.html#3873">source</a></span><h4 class="code-header">pub unsafe fn <a href="#method.align_to" class="fn">align_to</a>&lt;U&gt;(&amp;self) -&gt; (&amp;<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html">[T]</a>, &amp;<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html">[U]</a>, &amp;<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html">[T]</a>)</h4></section></summary><div class="docblock"><p>Transmutes the slice to a slice of another type, ensuring alignment of the types is
maintained.</p>
<p>This method splits the slice into three distinct slices: prefix, correctly aligned middle
slice of a new type, and the suffix slice. The middle part will be as big as possible under
the given alignment constraint and element size.</p>
<p>This method has no purpose when either input element <code>T</code> or output element <code>U</code> are
zero-sized and will return the original slice without splitting anything.</p>
<h5 id="safety-4"><a class="doc-anchor" href="#safety-4">§</a>Safety</h5>
<p>This method is essentially a <code>transmute</code> with respect to the elements in the returned
middle slice, so all the usual caveats pertaining to <code>transmute::&lt;T, U&gt;</code> also apply here.</p>
<h5 id="examples-53"><a class="doc-anchor" href="#examples-53">§</a>Examples</h5>
<p>Basic usage:</p>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">unsafe </span>{
<span class="kw">let </span>bytes: [u8; <span class="number">7</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="number">7</span>];
<span class="kw">let </span>(prefix, shorts, suffix) = bytes.align_to::&lt;u16&gt;();
<span class="comment">// less_efficient_algorithm_for_bytes(prefix);
// more_efficient_algorithm_for_aligned_shorts(shorts);
// less_efficient_algorithm_for_bytes(suffix);
</span>}</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.as_simd" class="method"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/slice/mod.rs.html#4029-4033">source</a><h4 class="code-header">pub fn <a href="#method.as_simd" class="fn">as_simd</a>&lt;const LANES: <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.usize.html">usize</a>&gt;(&amp;self) -&gt; (&amp;<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html">[T]</a>, &amp;[<a class="struct" href="https://doc.rust-lang.org/1.83.0/core/core_simd/vector/struct.Simd.html" title="struct core::core_simd::vector::Simd">Simd</a>&lt;T, LANES&gt;], &amp;<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html">[T]</a>)<div class="where">where
<a class="struct" href="https://doc.rust-lang.org/1.83.0/core/core_simd/vector/struct.Simd.html" title="struct core::core_simd::vector::Simd">Simd</a>&lt;T, LANES&gt;: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/convert/trait.AsRef.html" title="trait core::convert::AsRef">AsRef</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.array.html">[T; LANES]</a>&gt;,
T: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/core_simd/vector/trait.SimdElement.html" title="trait core::core_simd::vector::SimdElement">SimdElement</a>,
<a class="struct" href="https://doc.rust-lang.org/1.83.0/core/core_simd/lane_count/struct.LaneCount.html" title="struct core::core_simd::lane_count::LaneCount">LaneCount</a>&lt;LANES&gt;: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/core_simd/lane_count/trait.SupportedLaneCount.html" title="trait core::core_simd::lane_count::SupportedLaneCount">SupportedLaneCount</a>,</div></h4></section><span class="item-info"><div class="stab unstable"><span class="emoji">🔬</span><span>This is a nightly-only experimental API. (<code>portable_simd</code>)</span></div></span></summary><div class="docblock"><p>Splits a slice into a prefix, a middle of aligned SIMD types, and a suffix.</p>
<p>This is a safe wrapper around <a href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html#method.align_to" title="method slice::align_to"><code>slice::align_to</code></a>, so inherits the same
guarantees as that method.</p>
<h5 id="panics-10"><a class="doc-anchor" href="#panics-10">§</a>Panics</h5>
<p>This will panic if the size of the SIMD type is different from
<code>LANES</code> times that of the scalar.</p>
<p>At the time of writing, the trait restrictions on <code>Simd&lt;T, LANES&gt;</code> keeps
that from ever happening, as only power-of-two numbers of lanes are
supported. It’s possible that, in the future, those restrictions might
be lifted in a way that would make it possible to see panics from this
method for something like <code>LANES == 3</code>.</p>
<h5 id="examples-54"><a class="doc-anchor" href="#examples-54">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="attr">#![feature(portable_simd)]
</span><span class="kw">use </span>core::simd::prelude::<span class="kw-2">*</span>;
<span class="kw">let </span>short = <span class="kw-2">&amp;</span>[<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>];
<span class="kw">let </span>(prefix, middle, suffix) = short.as_simd::&lt;<span class="number">4</span>&gt;();
<span class="macro">assert_eq!</span>(middle, []); <span class="comment">// Not enough elements for anything in the middle
// They might be split in any possible way between prefix and suffix
</span><span class="kw">let </span>it = prefix.iter().chain(suffix).copied();
<span class="macro">assert_eq!</span>(it.collect::&lt;Vec&lt;<span class="kw">_</span>&gt;&gt;(), <span class="macro">vec!</span>[<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>]);
<span class="kw">fn </span>basic_simd_sum(x: <span class="kw-2">&amp;</span>[f32]) -&gt; f32 {
<span class="kw">use </span>std::ops::Add;
<span class="kw">let </span>(prefix, middle, suffix) = x.as_simd();
<span class="kw">let </span>sums = f32x4::from_array([
prefix.iter().copied().sum(),
<span class="number">0.0</span>,
<span class="number">0.0</span>,
suffix.iter().copied().sum(),
]);
<span class="kw">let </span>sums = middle.iter().copied().fold(sums, f32x4::add);
sums.reduce_sum()
}
<span class="kw">let </span>numbers: Vec&lt;f32&gt; = (<span class="number">1</span>..<span class="number">101</span>).map(|x| x <span class="kw">as _</span>).collect();
<span class="macro">assert_eq!</span>(basic_simd_sum(<span class="kw-2">&amp;</span>numbers[<span class="number">1</span>..<span class="number">99</span>]), <span class="number">4949.0</span>);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.is_sorted" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.82.0">1.82.0</span> · <a class="src" href="https://doc.rust-lang.org/1.83.0/src/core/slice/mod.rs.html#4104-4106">source</a></span><h4 class="code-header">pub fn <a href="#method.is_sorted" class="fn">is_sorted</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.bool.html">bool</a><div class="where">where
T: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/cmp/trait.PartialOrd.html" title="trait core::cmp::PartialOrd">PartialOrd</a>,</div></h4></section></summary><div class="docblock"><p>Checks if the elements of this slice are sorted.</p>
<p>That is, for each element <code>a</code> and its following element <code>b</code>, <code>a &lt;= b</code> must hold. If the
slice yields exactly zero or one element, <code>true</code> is returned.</p>
<p>Note that if <code>Self::Item</code> is only <code>PartialOrd</code>, but not <code>Ord</code>, the above definition
implies that this function returns <code>false</code> if any two consecutive items are not
comparable.</p>
<h5 id="examples-55"><a class="doc-anchor" href="#examples-55">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>empty: [i32; <span class="number">0</span>] = [];
<span class="macro">assert!</span>([<span class="number">1</span>, <span class="number">2</span>, <span class="number">2</span>, <span class="number">9</span>].is_sorted());
<span class="macro">assert!</span>(![<span class="number">1</span>, <span class="number">3</span>, <span class="number">2</span>, <span class="number">4</span>].is_sorted());
<span class="macro">assert!</span>([<span class="number">0</span>].is_sorted());
<span class="macro">assert!</span>(empty.is_sorted());
<span class="macro">assert!</span>(![<span class="number">0.0</span>, <span class="number">1.0</span>, f32::NAN].is_sorted());</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.is_sorted_by" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.82.0">1.82.0</span> · <a class="src" href="https://doc.rust-lang.org/1.83.0/src/core/slice/mod.rs.html#4131-4133">source</a></span><h4 class="code-header">pub fn <a href="#method.is_sorted_by" class="fn">is_sorted_by</a>&lt;'a, F&gt;(&amp;'a self, compare: F) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.bool.html">bool</a><div class="where">where
F: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.reference.html">&amp;'a T</a>, <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.reference.html">&amp;'a T</a>) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.bool.html">bool</a>,</div></h4></section></summary><div class="docblock"><p>Checks if the elements of this slice are sorted using the given comparator function.</p>
<p>Instead of using <code>PartialOrd::partial_cmp</code>, this function uses the given <code>compare</code>
function to determine whether two elements are to be considered in sorted order.</p>
<h5 id="examples-56"><a class="doc-anchor" href="#examples-56">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="macro">assert!</span>([<span class="number">1</span>, <span class="number">2</span>, <span class="number">2</span>, <span class="number">9</span>].is_sorted_by(|a, b| a &lt;= b));
<span class="macro">assert!</span>(![<span class="number">1</span>, <span class="number">2</span>, <span class="number">2</span>, <span class="number">9</span>].is_sorted_by(|a, b| a &lt; b));
<span class="macro">assert!</span>([<span class="number">0</span>].is_sorted_by(|a, b| <span class="bool-val">true</span>));
<span class="macro">assert!</span>([<span class="number">0</span>].is_sorted_by(|a, b| <span class="bool-val">false</span>));
<span class="kw">let </span>empty: [i32; <span class="number">0</span>] = [];
<span class="macro">assert!</span>(empty.is_sorted_by(|a, b| <span class="bool-val">false</span>));
<span class="macro">assert!</span>(empty.is_sorted_by(|a, b| <span class="bool-val">true</span>));</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.is_sorted_by_key" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.82.0">1.82.0</span> · <a class="src" href="https://doc.rust-lang.org/1.83.0/src/core/slice/mod.rs.html#4155-4158">source</a></span><h4 class="code-header">pub fn <a href="#method.is_sorted_by_key" class="fn">is_sorted_by_key</a>&lt;'a, F, K&gt;(&amp;'a self, f: F) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.bool.html">bool</a><div class="where">where
F: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.reference.html">&amp;'a T</a>) -&gt; K,
K: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/cmp/trait.PartialOrd.html" title="trait core::cmp::PartialOrd">PartialOrd</a>,</div></h4></section></summary><div class="docblock"><p>Checks if the elements of this slice are sorted using the given key extraction function.</p>
<p>Instead of comparing the slice’s elements directly, this function compares the keys of the
elements, as determined by <code>f</code>. Apart from that, it’s equivalent to <a href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html#method.is_sorted" title="method slice::is_sorted"><code>is_sorted</code></a>; see its
documentation for more information.</p>
<h5 id="examples-57"><a class="doc-anchor" href="#examples-57">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="macro">assert!</span>([<span class="string">"c"</span>, <span class="string">"bb"</span>, <span class="string">"aaa"</span>].is_sorted_by_key(|s| s.len()));
<span class="macro">assert!</span>(![-<span class="number">2i32</span>, -<span class="number">1</span>, <span class="number">0</span>, <span class="number">3</span>].is_sorted_by_key(|n| n.abs()));</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.partition_point" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.52.0">1.52.0</span> · <a class="src" href="https://doc.rust-lang.org/1.83.0/src/core/slice/mod.rs.html#4214-4216">source</a></span><h4 class="code-header">pub fn <a href="#method.partition_point" class="fn">partition_point</a>&lt;P&gt;(&amp;self, pred: P) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.usize.html">usize</a><div class="where">where
P: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.reference.html">&amp;T</a>) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.bool.html">bool</a>,</div></h4></section></summary><div class="docblock"><p>Returns the index of the partition point according to the given predicate
(the index of the first element of the second partition).</p>
<p>The slice is assumed to be partitioned according to the given predicate.
This means that all elements for which the predicate returns true are at the start of the slice
and all elements for which the predicate returns false are at the end.
For example, <code>[7, 15, 3, 5, 4, 12, 6]</code> is partitioned under the predicate <code>x % 2 != 0</code>
(all odd numbers are at the start, all even at the end).</p>
<p>If this slice is not partitioned, the returned result is unspecified and meaningless,
as this method performs a kind of binary search.</p>
<p>See also <a href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html#method.binary_search" title="method slice::binary_search"><code>binary_search</code></a>, <a href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html#method.binary_search_by" title="method slice::binary_search_by"><code>binary_search_by</code></a>, and <a href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html#method.binary_search_by_key" title="method slice::binary_search_by_key"><code>binary_search_by_key</code></a>.</p>
<h5 id="examples-58"><a class="doc-anchor" href="#examples-58">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>v = [<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>, <span class="number">3</span>, <span class="number">5</span>, <span class="number">6</span>, <span class="number">7</span>];
<span class="kw">let </span>i = v.partition_point(|<span class="kw-2">&amp;</span>x| x &lt; <span class="number">5</span>);
<span class="macro">assert_eq!</span>(i, <span class="number">4</span>);
<span class="macro">assert!</span>(v[..i].iter().all(|<span class="kw-2">&amp;</span>x| x &lt; <span class="number">5</span>));
<span class="macro">assert!</span>(v[i..].iter().all(|<span class="kw-2">&amp;</span>x| !(x &lt; <span class="number">5</span>)));</code></pre></div>
<p>If all elements of the slice match the predicate, including if the slice
is empty, then the length of the slice will be returned:</p>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>a = [<span class="number">2</span>, <span class="number">4</span>, <span class="number">8</span>];
<span class="macro">assert_eq!</span>(a.partition_point(|x| x &lt; <span class="kw-2">&amp;</span><span class="number">100</span>), a.len());
<span class="kw">let </span>a: [i32; <span class="number">0</span>] = [];
<span class="macro">assert_eq!</span>(a.partition_point(|x| x &lt; <span class="kw-2">&amp;</span><span class="number">100</span>), <span class="number">0</span>);</code></pre></div>
<p>If you want to insert an item to a sorted vector, while maintaining
sort order:</p>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span><span class="kw-2">mut </span>s = <span class="macro">vec!</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>num = <span class="number">42</span>;
<span class="kw">let </span>idx = s.partition_point(|<span class="kw-2">&amp;</span>x| x &lt;= num);
s.insert(idx, num);
<span class="macro">assert_eq!</span>(s, [<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">42</span>, <span class="number">55</span>]);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.elem_offset" class="method"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/slice/mod.rs.html#4584">source</a><h4 class="code-header">pub fn <a href="#method.elem_offset" class="fn">elem_offset</a>(&amp;self, element: <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.reference.html">&amp;T</a>) -&gt; <a class="enum" href="https://doc.rust-lang.org/1.83.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.usize.html">usize</a>&gt;</h4></section><span class="item-info"><div class="stab unstable"><span class="emoji">🔬</span><span>This is a nightly-only experimental API. (<code>substr_range</code>)</span></div></span></summary><div class="docblock"><p>Returns the index that an element reference points to.</p>
<p>Returns <code>None</code> if <code>element</code> does not point within the slice or if it points between elements.</p>
<p>This method is useful for extending slice iterators like <a href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html#method.split" title="method slice::split"><code>slice::split</code></a>.</p>
<p>Note that this uses pointer arithmetic and <strong>does not compare elements</strong>.
To find the index of an element via comparison, use
<a href="https://doc.rust-lang.org/1.83.0/core/iter/traits/iterator/trait.Iterator.html#method.position" title="method core::iter::traits::iterator::Iterator::position"><code>.iter().position()</code></a> instead.</p>
<h5 id="panics-11"><a class="doc-anchor" href="#panics-11">§</a>Panics</h5>
<p>Panics if <code>T</code> is zero-sized.</p>
<h5 id="examples-59"><a class="doc-anchor" href="#examples-59">§</a>Examples</h5>
<p>Basic usage:</p>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="attr">#![feature(substr_range)]
</span><span class="kw">let </span>nums: <span class="kw-2">&amp;</span>[u32] = <span class="kw-2">&amp;</span>[<span class="number">1</span>, <span class="number">7</span>, <span class="number">1</span>, <span class="number">1</span>];
<span class="kw">let </span>num = <span class="kw-2">&amp;</span>nums[<span class="number">2</span>];
<span class="macro">assert_eq!</span>(num, <span class="kw-2">&amp;</span><span class="number">1</span>);
<span class="macro">assert_eq!</span>(nums.elem_offset(num), <span class="prelude-val">Some</span>(<span class="number">2</span>));</code></pre></div>
<p>Returning <code>None</code> with an in-between element:</p>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="attr">#![feature(substr_range)]
</span><span class="kw">let </span>arr: <span class="kw-2">&amp;</span>[[u32; <span class="number">2</span>]] = <span class="kw-2">&amp;</span>[[<span class="number">0</span>, <span class="number">1</span>], [<span class="number">2</span>, <span class="number">3</span>]];
<span class="kw">let </span>flat_arr: <span class="kw-2">&amp;</span>[u32] = arr.as_flattened();
<span class="kw">let </span>ok_elm: <span class="kw-2">&amp;</span>[u32; <span class="number">2</span>] = flat_arr[<span class="number">0</span>..<span class="number">2</span>].try_into().unwrap();
<span class="kw">let </span>weird_elm: <span class="kw-2">&amp;</span>[u32; <span class="number">2</span>] = flat_arr[<span class="number">1</span>..<span class="number">3</span>].try_into().unwrap();
<span class="macro">assert_eq!</span>(ok_elm, <span class="kw-2">&amp;</span>[<span class="number">0</span>, <span class="number">1</span>]);
<span class="macro">assert_eq!</span>(weird_elm, <span class="kw-2">&amp;</span>[<span class="number">1</span>, <span class="number">2</span>]);
<span class="macro">assert_eq!</span>(arr.elem_offset(ok_elm), <span class="prelude-val">Some</span>(<span class="number">0</span>)); <span class="comment">// Points to element 0
</span><span class="macro">assert_eq!</span>(arr.elem_offset(weird_elm), <span class="prelude-val">None</span>); <span class="comment">// Points between element 0 and 1</span></code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.subslice_range" class="method"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/slice/mod.rs.html#4637">source</a><h4 class="code-header">pub fn <a href="#method.subslice_range" class="fn">subslice_range</a>(&amp;self, subslice: &amp;<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html">[T]</a>) -&gt; <a class="enum" href="https://doc.rust-lang.org/1.83.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a>&lt;<a class="struct" href="https://doc.rust-lang.org/1.83.0/core/ops/range/struct.Range.html" title="struct core::ops::range::Range">Range</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.usize.html">usize</a>&gt;&gt;</h4></section><span class="item-info"><div class="stab unstable"><span class="emoji">🔬</span><span>This is a nightly-only experimental API. (<code>substr_range</code>)</span></div></span></summary><div class="docblock"><p>Returns the range of indices that a subslice points to.</p>
<p>Returns <code>None</code> if <code>subslice</code> does not point within the slice or if it points between elements.</p>
<p>This method <strong>does not compare elements</strong>. Instead, this method finds the location in the slice that
<code>subslice</code> was obtained from. To find the index of a subslice via comparison, instead use
<a href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html#method.windows" title="method slice::windows"><code>.windows()</code></a><a href="https://doc.rust-lang.org/1.83.0/core/iter/traits/iterator/trait.Iterator.html#method.position" title="method core::iter::traits::iterator::Iterator::position"><code>.position()</code></a>.</p>
<p>This method is useful for extending slice iterators like <a href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html#method.split" title="method slice::split"><code>slice::split</code></a>.</p>
<p>Note that this may return a false positive (either <code>Some(0..0)</code> or <code>Some(self.len()..self.len())</code>)
if <code>subslice</code> has a length of zero and points to the beginning or end of another, separate, slice.</p>
<h5 id="panics-12"><a class="doc-anchor" href="#panics-12">§</a>Panics</h5>
<p>Panics if <code>T</code> is zero-sized.</p>
<h5 id="examples-60"><a class="doc-anchor" href="#examples-60">§</a>Examples</h5>
<p>Basic usage:</p>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="attr">#![feature(substr_range)]
</span><span class="kw">let </span>nums = <span class="kw-2">&amp;</span>[<span class="number">0</span>, <span class="number">5</span>, <span class="number">10</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">5</span>];
<span class="kw">let </span><span class="kw-2">mut </span>iter = nums
.split(|t| <span class="kw-2">*</span>t == <span class="number">0</span>)
.map(|n| nums.subslice_range(n).unwrap());
<span class="macro">assert_eq!</span>(iter.next(), <span class="prelude-val">Some</span>(<span class="number">0</span>..<span class="number">0</span>));
<span class="macro">assert_eq!</span>(iter.next(), <span class="prelude-val">Some</span>(<span class="number">1</span>..<span class="number">3</span>));
<span class="macro">assert_eq!</span>(iter.next(), <span class="prelude-val">Some</span>(<span class="number">4</span>..<span class="number">4</span>));
<span class="macro">assert_eq!</span>(iter.next(), <span class="prelude-val">Some</span>(<span class="number">5</span>..<span class="number">6</span>));</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.as_flattened" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.80.0">1.80.0</span> · <a class="src" href="https://doc.rust-lang.org/1.83.0/src/core/slice/mod.rs.html#4687">source</a></span><h4 class="code-header">pub fn <a href="#method.as_flattened" class="fn">as_flattened</a>(&amp;self) -&gt; &amp;<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html">[T]</a></h4></section></summary><div class="docblock"><p>Takes a <code>&amp;[[T; N]]</code>, and flattens it to a <code>&amp;[T]</code>.</p>
<h5 id="panics-13"><a class="doc-anchor" href="#panics-13">§</a>Panics</h5>
<p>This panics if the length of the resulting slice would overflow a <code>usize</code>.</p>
<p>This is only possible when flattening a slice of arrays of zero-sized
types, and thus tends to be irrelevant in practice. If
<code>size_of::&lt;T&gt;() &gt; 0</code>, this will never panic.</p>
<h5 id="examples-61"><a class="doc-anchor" href="#examples-61">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="macro">assert_eq!</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>]].as_flattened(), <span class="kw-2">&amp;</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_eq!</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>]].as_flattened(),
[[<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>]].as_flattened(),
);
<span class="kw">let </span>slice_of_empty_arrays: <span class="kw-2">&amp;</span>[[i32; <span class="number">0</span>]] = <span class="kw-2">&amp;</span>[[], [], [], [], []];
<span class="macro">assert!</span>(slice_of_empty_arrays.as_flattened().is_empty());
<span class="kw">let </span>empty_slice_of_arrays: <span class="kw-2">&amp;</span>[[u32; <span class="number">10</span>]] = <span class="kw-2">&amp;</span>[];
<span class="macro">assert!</span>(empty_slice_of_arrays.as_flattened().is_empty());</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.utf8_chunks" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.79.0">1.79.0</span> · <a class="src" href="https://doc.rust-lang.org/1.83.0/src/core/str/lossy.rs.html#44">source</a></span><h4 class="code-header">pub fn <a href="#method.utf8_chunks" class="fn">utf8_chunks</a>(&amp;self) -&gt; <a class="struct" href="https://doc.rust-lang.org/1.83.0/core/str/lossy/struct.Utf8Chunks.html" title="struct core::str::lossy::Utf8Chunks">Utf8Chunks</a>&lt;'_&gt;</h4></section></summary><div class="docblock"><p>Creates an iterator over the contiguous valid UTF-8 ranges of this
slice, and the non-UTF-8 fragments in between.</p>
<p>See the <a href="https://doc.rust-lang.org/1.83.0/core/str/lossy/struct.Utf8Chunk.html" title="struct core::str::lossy::Utf8Chunk"><code>Utf8Chunk</code></a> type for documenation of the items yielded by this iterator.</p>
<h5 id="examples-62"><a class="doc-anchor" href="#examples-62">§</a>Examples</h5>
<p>This function formats arbitrary but mostly-UTF-8 bytes into Rust source
code in the form of a C-string literal (<code>c"..."</code>).</p>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>std::fmt::Write <span class="kw">as _</span>;
<span class="kw">pub fn </span>cstr_literal(bytes: <span class="kw-2">&amp;</span>[u8]) -&gt; String {
<span class="kw">let </span><span class="kw-2">mut </span>repr = String::new();
repr.push_str(<span class="string">"c\""</span>);
<span class="kw">for </span>chunk <span class="kw">in </span>bytes.utf8_chunks() {
<span class="kw">for </span>ch <span class="kw">in </span>chunk.valid().chars() {
<span class="comment">// Escapes \0, \t, \r, \n, \\, \', \", and uses \u{...} for non-printable characters.
</span><span class="macro">write!</span>(repr, <span class="string">"{}"</span>, ch.escape_debug()).unwrap();
}
<span class="kw">for </span>byte <span class="kw">in </span>chunk.invalid() {
<span class="macro">write!</span>(repr, <span class="string">"\\x{:02X}"</span>, byte).unwrap();
}
}
repr.push(<span class="string">'"'</span>);
repr
}
<span class="kw">fn </span>main() {
<span class="kw">let </span>lit = cstr_literal(<span class="string">b"\xferris the \xf0\x9f\xa6\x80\x07"</span>);
<span class="kw">let </span>expected = <span class="macro">stringify!</span>(<span class="string">c"\xFErris the 🦀\u{7}"</span>);
<span class="macro">assert_eq!</span>(lit, expected);
}</code></pre></div>
</div></details></div></details><h2 id="trait-implementations" class="section-header">Trait Implementations<a href="#trait-implementations" class="anchor">§</a></h2><div id="trait-implementations-list"><details class="toggle implementors-toggle" open><summary><section id="impl-AsRef%3C%5BT%5D%3E-for-HistoryBuffer%3CT,+N%3E" class="impl"><a class="src rightside" href="../src/heapless/histbuf.rs.html#297-302">source</a><a href="#impl-AsRef%3C%5BT%5D%3E-for-HistoryBuffer%3CT,+N%3E" class="anchor">§</a><h3 class="code-header">impl&lt;T, const N: <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.usize.html">usize</a>&gt; <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/convert/trait.AsRef.html" title="trait core::convert::AsRef">AsRef</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html">[T]</a>&gt; for <a class="struct" href="struct.HistoryBuffer.html" title="struct heapless::HistoryBuffer">HistoryBuffer</a>&lt;T, N&gt;</h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.as_ref" class="method trait-impl"><a class="src rightside" href="../src/heapless/histbuf.rs.html#299-301">source</a><a href="#method.as_ref" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.83.0/core/convert/trait.AsRef.html#tymethod.as_ref" class="fn">as_ref</a>(&amp;self) -&gt; &amp;<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html">[T]</a></h4></section></summary><div class='docblock'>Converts this type into a shared reference of the (usually inferred) input type.</div></details></div></details><details class="toggle implementors-toggle" open><summary><section id="impl-Clone-for-HistoryBuffer%3CT,+N%3E" class="impl"><a class="src rightside" href="../src/heapless/histbuf.rs.html#263-276">source</a><a href="#impl-Clone-for-HistoryBuffer%3CT,+N%3E" class="anchor">§</a><h3 class="code-header">impl&lt;T, const N: <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.usize.html">usize</a>&gt; <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a> for <a class="struct" href="struct.HistoryBuffer.html" title="struct heapless::HistoryBuffer">HistoryBuffer</a>&lt;T, N&gt;<div class="where">where
T: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.clone" class="method trait-impl"><a class="src rightside" href="../src/heapless/histbuf.rs.html#267-275">source</a><a href="#method.clone" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.83.0/core/clone/trait.Clone.html#tymethod.clone" class="fn">clone</a>(&amp;self) -&gt; Self</h4></section></summary><div class='docblock'>Returns a copy of the value. <a href="https://doc.rust-lang.org/1.83.0/core/clone/trait.Clone.html#tymethod.clone">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.clone_from" class="method trait-impl"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="src" href="https://doc.rust-lang.org/1.83.0/src/core/clone.rs.html#174">source</a></span><a href="#method.clone_from" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.83.0/core/clone/trait.Clone.html#method.clone_from" class="fn">clone_from</a>(&amp;mut self, source: &amp;Self)</h4></section></summary><div class='docblock'>Performs copy-assignment from <code>source</code>. <a href="https://doc.rust-lang.org/1.83.0/core/clone/trait.Clone.html#method.clone_from">Read more</a></div></details></div></details><details class="toggle implementors-toggle" open><summary><section id="impl-Debug-for-HistoryBuffer%3CT,+N%3E" class="impl"><a class="src rightside" href="../src/heapless/histbuf.rs.html#304-311">source</a><a href="#impl-Debug-for-HistoryBuffer%3CT,+N%3E" class="anchor">§</a><h3 class="code-header">impl&lt;T, const N: <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.usize.html">usize</a>&gt; <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/fmt/trait.Debug.html" title="trait core::fmt::Debug">Debug</a> for <a class="struct" href="struct.HistoryBuffer.html" title="struct heapless::HistoryBuffer">HistoryBuffer</a>&lt;T, N&gt;<div class="where">where
T: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/fmt/trait.Debug.html" title="trait core::fmt::Debug">Debug</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.fmt" class="method trait-impl"><a class="src rightside" href="../src/heapless/histbuf.rs.html#308-310">source</a><a href="#method.fmt" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.83.0/core/fmt/trait.Debug.html#tymethod.fmt" class="fn">fmt</a>(&amp;self, f: &amp;mut <a class="struct" href="https://doc.rust-lang.org/1.83.0/core/fmt/struct.Formatter.html" title="struct core::fmt::Formatter">Formatter</a>&lt;'_&gt;) -&gt; <a class="type" href="https://doc.rust-lang.org/1.83.0/core/fmt/type.Result.html" title="type core::fmt::Result">Result</a></h4></section></summary><div class='docblock'>Formats the value using the given formatter. <a href="https://doc.rust-lang.org/1.83.0/core/fmt/trait.Debug.html#tymethod.fmt">Read more</a></div></details></div></details><details class="toggle implementors-toggle" open><summary><section id="impl-Default-for-HistoryBuffer%3CT,+N%3E" class="impl"><a class="src rightside" href="../src/heapless/histbuf.rs.html#313-317">source</a><a href="#impl-Default-for-HistoryBuffer%3CT,+N%3E" class="anchor">§</a><h3 class="code-header">impl&lt;T, const N: <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.usize.html">usize</a>&gt; <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/default/trait.Default.html" title="trait core::default::Default">Default</a> for <a class="struct" href="struct.HistoryBuffer.html" title="struct heapless::HistoryBuffer">HistoryBuffer</a>&lt;T, N&gt;</h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.default" class="method trait-impl"><a class="src rightside" href="../src/heapless/histbuf.rs.html#314-316">source</a><a href="#method.default" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.83.0/core/default/trait.Default.html#tymethod.default" class="fn">default</a>() -&gt; Self</h4></section></summary><div class='docblock'>Returns the “default value” for a type. <a href="https://doc.rust-lang.org/1.83.0/core/default/trait.Default.html#tymethod.default">Read more</a></div></details></div></details><details class="toggle implementors-toggle" open><summary><section id="impl-Deref-for-HistoryBuffer%3CT,+N%3E" class="impl"><a class="src rightside" href="../src/heapless/histbuf.rs.html#289-295">source</a><a href="#impl-Deref-for-HistoryBuffer%3CT,+N%3E" class="anchor">§</a><h3 class="code-header">impl&lt;T, const N: <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.usize.html">usize</a>&gt; <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/ops/deref/trait.Deref.html" title="trait core::ops::deref::Deref">Deref</a> for <a class="struct" href="struct.HistoryBuffer.html" title="struct heapless::HistoryBuffer">HistoryBuffer</a>&lt;T, N&gt;</h3></section></summary><div class="impl-items"><details class="toggle" open><summary><section id="associatedtype.Target" class="associatedtype trait-impl"><a class="src rightside" href="../src/heapless/histbuf.rs.html#290">source</a><a href="#associatedtype.Target" class="anchor">§</a><h4 class="code-header">type <a href="https://doc.rust-lang.org/1.83.0/core/ops/deref/trait.Deref.html#associatedtype.Target" class="associatedtype">Target</a> = <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html">[T]</a></h4></section></summary><div class='docblock'>The resulting type after dereferencing.</div></details><details class="toggle method-toggle" open><summary><section id="method.deref" class="method trait-impl"><a class="src rightside" href="../src/heapless/histbuf.rs.html#292-294">source</a><a href="#method.deref" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.83.0/core/ops/deref/trait.Deref.html#tymethod.deref" class="fn">deref</a>(&amp;self) -&gt; &amp;<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.slice.html">[T]</a></h4></section></summary><div class='docblock'>Dereferences the value.</div></details></div></details><details class="toggle implementors-toggle" open><summary><section id="impl-Drop-for-HistoryBuffer%3CT,+N%3E" class="impl"><a class="src rightside" href="../src/heapless/histbuf.rs.html#278-287">source</a><a href="#impl-Drop-for-HistoryBuffer%3CT,+N%3E" class="anchor">§</a><h3 class="code-header">impl&lt;T, const N: <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.usize.html">usize</a>&gt; <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/ops/drop/trait.Drop.html" title="trait core::ops::drop::Drop">Drop</a> for <a class="struct" href="struct.HistoryBuffer.html" title="struct heapless::HistoryBuffer">HistoryBuffer</a>&lt;T, N&gt;</h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.drop" class="method trait-impl"><a class="src rightside" href="../src/heapless/histbuf.rs.html#279-286">source</a><a href="#method.drop" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.83.0/core/ops/drop/trait.Drop.html#tymethod.drop" class="fn">drop</a>(&amp;mut self)</h4></section></summary><div class='docblock'>Executes the destructor for this type. <a href="https://doc.rust-lang.org/1.83.0/core/ops/drop/trait.Drop.html#tymethod.drop">Read more</a></div></details></div></details><details class="toggle implementors-toggle" open><summary><section id="impl-Extend%3C%26T%3E-for-HistoryBuffer%3CT,+N%3E" class="impl"><a class="src rightside" href="../src/heapless/histbuf.rs.html#251-261">source</a><a href="#impl-Extend%3C%26T%3E-for-HistoryBuffer%3CT,+N%3E" class="anchor">§</a><h3 class="code-header">impl&lt;'a, T, const N: <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.usize.html">usize</a>&gt; <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/iter/traits/collect/trait.Extend.html" title="trait core::iter::traits::collect::Extend">Extend</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.reference.html">&amp;'a T</a>&gt; for <a class="struct" href="struct.HistoryBuffer.html" title="struct heapless::HistoryBuffer">HistoryBuffer</a>&lt;T, N&gt;<div class="where">where
T: 'a + <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.extend-1" class="method trait-impl"><a class="src rightside" href="../src/heapless/histbuf.rs.html#255-260">source</a><a href="#method.extend-1" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.83.0/core/iter/traits/collect/trait.Extend.html#tymethod.extend" class="fn">extend</a>&lt;I&gt;(&amp;mut self, iter: I)<div class="where">where
I: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/iter/traits/collect/trait.IntoIterator.html" title="trait core::iter::traits::collect::IntoIterator">IntoIterator</a>&lt;Item = <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.reference.html">&amp;'a T</a>&gt;,</div></h4></section></summary><div class='docblock'>Extends a collection with the contents of an iterator. <a href="https://doc.rust-lang.org/1.83.0/core/iter/traits/collect/trait.Extend.html#tymethod.extend">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.extend_one-1" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/iter/traits/collect.rs.html#454">source</a><a href="#method.extend_one-1" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.83.0/core/iter/traits/collect/trait.Extend.html#method.extend_one" class="fn">extend_one</a>(&amp;mut self, item: A)</h4></section></summary><span class="item-info"><div class="stab unstable"><span class="emoji">🔬</span><span>This is a nightly-only experimental API. (<code>extend_one</code>)</span></div></span><div class='docblock'>Extends a collection with exactly one element.</div></details><details class="toggle method-toggle" open><summary><section id="method.extend_reserve-1" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/iter/traits/collect.rs.html#462">source</a><a href="#method.extend_reserve-1" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.83.0/core/iter/traits/collect/trait.Extend.html#method.extend_reserve" class="fn">extend_reserve</a>(&amp;mut self, additional: <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.usize.html">usize</a>)</h4></section></summary><span class="item-info"><div class="stab unstable"><span class="emoji">🔬</span><span>This is a nightly-only experimental API. (<code>extend_one</code>)</span></div></span><div class='docblock'>Reserves capacity in a collection for the given number of additional elements. <a href="https://doc.rust-lang.org/1.83.0/core/iter/traits/collect/trait.Extend.html#method.extend_reserve">Read more</a></div></details></div></details><details class="toggle implementors-toggle" open><summary><section id="impl-Extend%3CT%3E-for-HistoryBuffer%3CT,+N%3E" class="impl"><a class="src rightside" href="../src/heapless/histbuf.rs.html#240-249">source</a><a href="#impl-Extend%3CT%3E-for-HistoryBuffer%3CT,+N%3E" class="anchor">§</a><h3 class="code-header">impl&lt;T, const N: <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.usize.html">usize</a>&gt; <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/iter/traits/collect/trait.Extend.html" title="trait core::iter::traits::collect::Extend">Extend</a>&lt;T&gt; for <a class="struct" href="struct.HistoryBuffer.html" title="struct heapless::HistoryBuffer">HistoryBuffer</a>&lt;T, N&gt;</h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.extend" class="method trait-impl"><a class="src rightside" href="../src/heapless/histbuf.rs.html#241-248">source</a><a href="#method.extend" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.83.0/core/iter/traits/collect/trait.Extend.html#tymethod.extend" class="fn">extend</a>&lt;I&gt;(&amp;mut self, iter: I)<div class="where">where
I: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/iter/traits/collect/trait.IntoIterator.html" title="trait core::iter::traits::collect::IntoIterator">IntoIterator</a>&lt;Item = T&gt;,</div></h4></section></summary><div class='docblock'>Extends a collection with the contents of an iterator. <a href="https://doc.rust-lang.org/1.83.0/core/iter/traits/collect/trait.Extend.html#tymethod.extend">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.extend_one" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/iter/traits/collect.rs.html#454">source</a><a href="#method.extend_one" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.83.0/core/iter/traits/collect/trait.Extend.html#method.extend_one" class="fn">extend_one</a>(&amp;mut self, item: A)</h4></section></summary><span class="item-info"><div class="stab unstable"><span class="emoji">🔬</span><span>This is a nightly-only experimental API. (<code>extend_one</code>)</span></div></span><div class='docblock'>Extends a collection with exactly one element.</div></details><details class="toggle method-toggle" open><summary><section id="method.extend_reserve" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/iter/traits/collect.rs.html#462">source</a><a href="#method.extend_reserve" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.83.0/core/iter/traits/collect/trait.Extend.html#method.extend_reserve" class="fn">extend_reserve</a>(&amp;mut self, additional: <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.usize.html">usize</a>)</h4></section></summary><span class="item-info"><div class="stab unstable"><span class="emoji">🔬</span><span>This is a nightly-only experimental API. (<code>extend_one</code>)</span></div></span><div class='docblock'>Reserves capacity in a collection for the given number of additional elements. <a href="https://doc.rust-lang.org/1.83.0/core/iter/traits/collect/trait.Extend.html#method.extend_reserve">Read more</a></div></details></div></details><details class="toggle implementors-toggle" open><summary><section id="impl-PartialEq-for-HistoryBuffer%3CT,+N%3E" class="impl"><a class="src rightside" href="../src/heapless/histbuf.rs.html#319-326">source</a><a href="#impl-PartialEq-for-HistoryBuffer%3CT,+N%3E" class="anchor">§</a><h3 class="code-header">impl&lt;T, const N: <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.usize.html">usize</a>&gt; <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/cmp/trait.PartialEq.html" title="trait core::cmp::PartialEq">PartialEq</a> for <a class="struct" href="struct.HistoryBuffer.html" title="struct heapless::HistoryBuffer">HistoryBuffer</a>&lt;T, N&gt;<div class="where">where
T: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/cmp/trait.PartialEq.html" title="trait core::cmp::PartialEq">PartialEq</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.eq" class="method trait-impl"><a class="src rightside" href="../src/heapless/histbuf.rs.html#323-325">source</a><a href="#method.eq" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.83.0/core/cmp/trait.PartialEq.html#tymethod.eq" class="fn">eq</a>(&amp;self, other: &amp;Self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.bool.html">bool</a></h4></section></summary><div class='docblock'>Tests for <code>self</code> and <code>other</code> values to be equal, and is used by <code>==</code>.</div></details><details class="toggle method-toggle" open><summary><section id="method.ne" class="method trait-impl"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="src" href="https://doc.rust-lang.org/1.83.0/src/core/cmp.rs.html#261">source</a></span><a href="#method.ne" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.83.0/core/cmp/trait.PartialEq.html#method.ne" class="fn">ne</a>(&amp;self, other: <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.reference.html">&amp;Rhs</a>) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.bool.html">bool</a></h4></section></summary><div class='docblock'>Tests for <code>!=</code>. The default implementation is almost always sufficient,
and should not be overridden without very good reason.</div></details></div></details></div><h2 id="synthetic-implementations" class="section-header">Auto Trait Implementations<a href="#synthetic-implementations" class="anchor">§</a></h2><div id="synthetic-implementations-list"><section id="impl-Freeze-for-HistoryBuffer%3CT,+N%3E" class="impl"><a href="#impl-Freeze-for-HistoryBuffer%3CT,+N%3E" class="anchor">§</a><h3 class="code-header">impl&lt;T, const N: <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.usize.html">usize</a>&gt; <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/marker/trait.Freeze.html" title="trait core::marker::Freeze">Freeze</a> for <a class="struct" href="struct.HistoryBuffer.html" title="struct heapless::HistoryBuffer">HistoryBuffer</a>&lt;T, N&gt;<div class="where">where
T: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/marker/trait.Freeze.html" title="trait core::marker::Freeze">Freeze</a>,</div></h3></section><section id="impl-RefUnwindSafe-for-HistoryBuffer%3CT,+N%3E" class="impl"><a href="#impl-RefUnwindSafe-for-HistoryBuffer%3CT,+N%3E" class="anchor">§</a><h3 class="code-header">impl&lt;T, const N: <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.usize.html">usize</a>&gt; <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/panic/unwind_safe/trait.RefUnwindSafe.html" title="trait core::panic::unwind_safe::RefUnwindSafe">RefUnwindSafe</a> for <a class="struct" href="struct.HistoryBuffer.html" title="struct heapless::HistoryBuffer">HistoryBuffer</a>&lt;T, N&gt;<div class="where">where
T: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/panic/unwind_safe/trait.RefUnwindSafe.html" title="trait core::panic::unwind_safe::RefUnwindSafe">RefUnwindSafe</a>,</div></h3></section><section id="impl-Send-for-HistoryBuffer%3CT,+N%3E" class="impl"><a href="#impl-Send-for-HistoryBuffer%3CT,+N%3E" class="anchor">§</a><h3 class="code-header">impl&lt;T, const N: <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.usize.html">usize</a>&gt; <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> for <a class="struct" href="struct.HistoryBuffer.html" title="struct heapless::HistoryBuffer">HistoryBuffer</a>&lt;T, N&gt;<div class="where">where
T: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a>,</div></h3></section><section id="impl-Sync-for-HistoryBuffer%3CT,+N%3E" class="impl"><a href="#impl-Sync-for-HistoryBuffer%3CT,+N%3E" class="anchor">§</a><h3 class="code-header">impl&lt;T, const N: <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.usize.html">usize</a>&gt; <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a> for <a class="struct" href="struct.HistoryBuffer.html" title="struct heapless::HistoryBuffer">HistoryBuffer</a>&lt;T, N&gt;<div class="where">where
T: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a>,</div></h3></section><section id="impl-Unpin-for-HistoryBuffer%3CT,+N%3E" class="impl"><a href="#impl-Unpin-for-HistoryBuffer%3CT,+N%3E" class="anchor">§</a><h3 class="code-header">impl&lt;T, const N: <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.usize.html">usize</a>&gt; <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a> for <a class="struct" href="struct.HistoryBuffer.html" title="struct heapless::HistoryBuffer">HistoryBuffer</a>&lt;T, N&gt;<div class="where">where
T: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a>,</div></h3></section><section id="impl-UnwindSafe-for-HistoryBuffer%3CT,+N%3E" class="impl"><a href="#impl-UnwindSafe-for-HistoryBuffer%3CT,+N%3E" class="anchor">§</a><h3 class="code-header">impl&lt;T, const N: <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.usize.html">usize</a>&gt; <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/panic/unwind_safe/trait.UnwindSafe.html" title="trait core::panic::unwind_safe::UnwindSafe">UnwindSafe</a> for <a class="struct" href="struct.HistoryBuffer.html" title="struct heapless::HistoryBuffer">HistoryBuffer</a>&lt;T, N&gt;<div class="where">where
T: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/panic/unwind_safe/trait.UnwindSafe.html" title="trait core::panic::unwind_safe::UnwindSafe">UnwindSafe</a>,</div></h3></section></div><h2 id="blanket-implementations" class="section-header">Blanket Implementations<a href="#blanket-implementations" class="anchor">§</a></h2><div id="blanket-implementations-list"><details class="toggle implementors-toggle"><summary><section id="impl-Any-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/any.rs.html#138">source</a><a href="#impl-Any-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/any/trait.Any.html" title="trait core::any::Any">Any</a> for T<div class="where">where
T: 'static + ?<a class="trait" href="https://doc.rust-lang.org/1.83.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.type_id" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/any.rs.html#139">source</a><a href="#method.type_id" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.83.0/core/any/trait.Any.html#tymethod.type_id" class="fn">type_id</a>(&amp;self) -&gt; <a class="struct" href="https://doc.rust-lang.org/1.83.0/core/any/struct.TypeId.html" title="struct core::any::TypeId">TypeId</a></h4></section></summary><div class='docblock'>Gets the <code>TypeId</code> of <code>self</code>. <a href="https://doc.rust-lang.org/1.83.0/core/any/trait.Any.html#tymethod.type_id">Read more</a></div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-Borrow%3CT%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/borrow.rs.html#209">source</a><a href="#impl-Borrow%3CT%3E-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/borrow/trait.Borrow.html" title="trait core::borrow::Borrow">Borrow</a>&lt;T&gt; for T<div class="where">where
T: ?<a class="trait" href="https://doc.rust-lang.org/1.83.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.borrow" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/borrow.rs.html#211">source</a><a href="#method.borrow" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.83.0/core/borrow/trait.Borrow.html#tymethod.borrow" class="fn">borrow</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.reference.html">&amp;T</a></h4></section></summary><div class='docblock'>Immutably borrows from an owned value. <a href="https://doc.rust-lang.org/1.83.0/core/borrow/trait.Borrow.html#tymethod.borrow">Read more</a></div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-BorrowMut%3CT%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/borrow.rs.html#217">source</a><a href="#impl-BorrowMut%3CT%3E-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/borrow/trait.BorrowMut.html" title="trait core::borrow::BorrowMut">BorrowMut</a>&lt;T&gt; for T<div class="where">where
T: ?<a class="trait" href="https://doc.rust-lang.org/1.83.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.borrow_mut" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/borrow.rs.html#218">source</a><a href="#method.borrow_mut" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.83.0/core/borrow/trait.BorrowMut.html#tymethod.borrow_mut" class="fn">borrow_mut</a>(&amp;mut self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.reference.html">&amp;mut T</a></h4></section></summary><div class='docblock'>Mutably borrows from an owned value. <a href="https://doc.rust-lang.org/1.83.0/core/borrow/trait.BorrowMut.html#tymethod.borrow_mut">Read more</a></div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-CloneToUninit-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/clone.rs.html#273">source</a><a href="#impl-CloneToUninit-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/clone/trait.CloneToUninit.html" title="trait core::clone::CloneToUninit">CloneToUninit</a> for T<div class="where">where
T: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.clone_to_uninit" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/clone.rs.html#275">source</a><a href="#method.clone_to_uninit" class="anchor">§</a><h4 class="code-header">unsafe fn <a href="https://doc.rust-lang.org/1.83.0/core/clone/trait.CloneToUninit.html#tymethod.clone_to_uninit" class="fn">clone_to_uninit</a>(&amp;self, dst: <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.pointer.html">*mut T</a>)</h4></section></summary><span class="item-info"><div class="stab unstable"><span class="emoji">🔬</span><span>This is a nightly-only experimental API. (<code>clone_to_uninit</code>)</span></div></span><div class='docblock'>Performs copy-assignment from <code>self</code> to <code>dst</code>. <a href="https://doc.rust-lang.org/1.83.0/core/clone/trait.CloneToUninit.html#tymethod.clone_to_uninit">Read more</a></div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-From%3CT%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/convert/mod.rs.html#765">source</a><a href="#impl-From%3CT%3E-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/convert/trait.From.html" title="trait core::convert::From">From</a>&lt;T&gt; for T</h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.from" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/convert/mod.rs.html#768">source</a><a href="#method.from" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.83.0/core/convert/trait.From.html#tymethod.from" class="fn">from</a>(t: T) -&gt; T</h4></section></summary><div class="docblock"><p>Returns the argument unchanged.</p>
</div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-Into%3CU%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/convert/mod.rs.html#748-750">source</a><a href="#impl-Into%3CU%3E-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T, U&gt; <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a>&lt;U&gt; for T<div class="where">where
U: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/convert/trait.From.html" title="trait core::convert::From">From</a>&lt;T&gt;,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.into" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/convert/mod.rs.html#758">source</a><a href="#method.into" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.83.0/core/convert/trait.Into.html#tymethod.into" class="fn">into</a>(self) -&gt; U</h4></section></summary><div class="docblock"><p>Calls <code>U::from(self)</code>.</p>
<p>That is, this conversion is whatever the implementation of
<code><a href="https://doc.rust-lang.org/1.83.0/core/convert/trait.From.html" title="trait core::convert::From">From</a>&lt;T&gt; for U</code> chooses to do.</p>
</div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-TryFrom%3CU%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/convert/mod.rs.html#805-807">source</a><a href="#impl-TryFrom%3CU%3E-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T, U&gt; <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a>&lt;U&gt; for T<div class="where">where
U: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a>&lt;T&gt;,</div></h3></section></summary><div class="impl-items"><details class="toggle" open><summary><section id="associatedtype.Error-1" class="associatedtype trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/convert/mod.rs.html#809">source</a><a href="#associatedtype.Error-1" class="anchor">§</a><h4 class="code-header">type <a href="https://doc.rust-lang.org/1.83.0/core/convert/trait.TryFrom.html#associatedtype.Error" class="associatedtype">Error</a> = <a class="enum" href="https://doc.rust-lang.org/1.83.0/core/convert/enum.Infallible.html" title="enum core::convert::Infallible">Infallible</a></h4></section></summary><div class='docblock'>The type returned in the event of a conversion error.</div></details><details class="toggle method-toggle" open><summary><section id="method.try_from" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/convert/mod.rs.html#812">source</a><a href="#method.try_from" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.83.0/core/convert/trait.TryFrom.html#tymethod.try_from" class="fn">try_from</a>(value: U) -&gt; <a class="enum" href="https://doc.rust-lang.org/1.83.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;T, &lt;T as <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a>&lt;U&gt;&gt;::<a class="associatedtype" href="https://doc.rust-lang.org/1.83.0/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a>&gt;</h4></section></summary><div class='docblock'>Performs the conversion.</div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-TryInto%3CU%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/convert/mod.rs.html#790-792">source</a><a href="#impl-TryInto%3CU%3E-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T, U&gt; <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/convert/trait.TryInto.html" title="trait core::convert::TryInto">TryInto</a>&lt;U&gt; for T<div class="where">where
U: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a>&lt;T&gt;,</div></h3></section></summary><div class="impl-items"><details class="toggle" open><summary><section id="associatedtype.Error" class="associatedtype trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/convert/mod.rs.html#794">source</a><a href="#associatedtype.Error" class="anchor">§</a><h4 class="code-header">type <a href="https://doc.rust-lang.org/1.83.0/core/convert/trait.TryInto.html#associatedtype.Error" class="associatedtype">Error</a> = &lt;U as <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a>&lt;T&gt;&gt;::<a class="associatedtype" href="https://doc.rust-lang.org/1.83.0/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a></h4></section></summary><div class='docblock'>The type returned in the event of a conversion error.</div></details><details class="toggle method-toggle" open><summary><section id="method.try_into" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/convert/mod.rs.html#797">source</a><a href="#method.try_into" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.83.0/core/convert/trait.TryInto.html#tymethod.try_into" class="fn">try_into</a>(self) -&gt; <a class="enum" href="https://doc.rust-lang.org/1.83.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;U, &lt;U as <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a>&lt;T&gt;&gt;::<a class="associatedtype" href="https://doc.rust-lang.org/1.83.0/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a>&gt;</h4></section></summary><div class='docblock'>Performs the conversion.</div></details></div></details></div><script type="text/json" id="notable-traits-data">{"OldestOrdered<'a, T, N>":"<h3>Notable traits for <code><a class=\"struct\" href=\"struct.OldestOrdered.html\" title=\"struct heapless::OldestOrdered\">OldestOrdered</a>&lt;'a, T, N&gt;</code></h3><pre><code><div class=\"where\">impl&lt;'a, T, const N: <a class=\"primitive\" href=\"https://doc.rust-lang.org/1.83.0/core/primitive.usize.html\">usize</a>&gt; <a class=\"trait\" href=\"https://doc.rust-lang.org/1.83.0/core/iter/traits/iterator/trait.Iterator.html\" title=\"trait core::iter::traits::iterator::Iterator\">Iterator</a> for <a class=\"struct\" href=\"struct.OldestOrdered.html\" title=\"struct heapless::OldestOrdered\">OldestOrdered</a>&lt;'a, T, N&gt;</div><div class=\"where\"> type <a href=\"https://doc.rust-lang.org/1.83.0/core/iter/traits/iterator/trait.Iterator.html#associatedtype.Item\" class=\"associatedtype\">Item</a> = <a class=\"primitive\" href=\"https://doc.rust-lang.org/1.83.0/core/primitive.reference.html\">&amp;'a T</a>;</div>"}</script></section></div></main></body></html>
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