| <!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="Desugared attributes of an item post `cfg_attr` expansion."><title>Attrs in hir - Rust</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-6b053e98.ttf.woff2,FiraSans-Italic-81dc35de.woff2,FiraSans-Regular-0fe48ade.woff2,FiraSans-MediumItalic-ccf7e434.woff2,FiraSans-Medium-e1aa3f0a.woff2,SourceCodePro-Regular-8badfe75.ttf.woff2,SourceCodePro-Semibold-aa29a496.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2" crossorigin href="../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../static.files/normalize-9960930a.css"><link rel="stylesheet" href="../static.files/rustdoc-aa0817cf.css"><meta name="rustdoc-vars" data-root-path="../" data-static-root-path="../static.files/" data-current-crate="hir" data-themes="" data-resource-suffix="" data-rustdoc-version="1.90.0 (1159e78c4 2025-09-14)" data-channel="1.90.0" data-search-js="search-fa3e91e5.js" data-settings-js="settings-5514c975.js" ><script src="../static.files/storage-68b7e25d.js"></script><script defer src="sidebar-items.js"></script><script defer src="../static.files/main-eebb9057.js"></script><noscript><link rel="stylesheet" href="../static.files/noscript-32bb7600.css"></noscript><link rel="alternate icon" type="image/png" href="../static.files/favicon-32x32-6580c154.png"><link rel="icon" type="image/svg+xml" href="../static.files/favicon-044be391.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="../hir/index.html">hir</a><span class="version">0.0.0</span></h2></div><div class="sidebar-elems"><section id="rustdoc-toc"><h2 class="location"><a href="#">Attrs</a></h2><h3><a href="#implementations">Associated Constants</a></h3><ul class="block associatedconstant"><li><a href="#associatedconstant.EMPTY" title="EMPTY">EMPTY</a></li></ul><h3><a href="#implementations">Methods</a></h3><ul class="block method"><li><a href="#method.by_key" title="by_key">by_key</a></li><li><a href="#method.cfg" title="cfg">cfg</a></li><li><a href="#method.cfgs" title="cfgs">cfgs</a></li><li><a href="#method.doc_aliases" title="doc_aliases">doc_aliases</a></li><li><a href="#method.doc_exprs" title="doc_exprs">doc_exprs</a></li><li><a href="#method.export_name" title="export_name">export_name</a></li><li><a href="#method.get" title="get">get</a></li><li><a href="#method.has_doc_hidden" title="has_doc_hidden">has_doc_hidden</a></li><li><a href="#method.has_doc_notable_trait" title="has_doc_notable_trait">has_doc_notable_trait</a></li><li><a href="#method.is_bench" title="is_bench">is_bench</a></li><li><a href="#method.is_ignore" title="is_ignore">is_ignore</a></li><li><a href="#method.is_proc_macro" title="is_proc_macro">is_proc_macro</a></li><li><a href="#method.is_proc_macro_attribute" title="is_proc_macro_attribute">is_proc_macro_attribute</a></li><li><a href="#method.is_proc_macro_derive" title="is_proc_macro_derive">is_proc_macro_derive</a></li><li><a href="#method.is_test" title="is_test">is_test</a></li><li><a href="#method.is_unstable" title="is_unstable">is_unstable</a></li><li><a href="#method.lang" title="lang">lang</a></li><li><a href="#method.lang_item" title="lang_item">lang_item</a></li><li><a href="#method.new" title="new">new</a></li><li><a href="#method.parse_proc_macro_decl" title="parse_proc_macro_decl">parse_proc_macro_decl</a></li><li><a href="#method.parse_proc_macro_derive" title="parse_proc_macro_derive">parse_proc_macro_derive</a></li><li><a href="#method.parse_rustc_builtin_macro" title="parse_rustc_builtin_macro">parse_rustc_builtin_macro</a></li><li><a href="#method.repr" title="repr">repr</a></li><li><a href="#method.rust_analyzer_tool" title="rust_analyzer_tool">rust_analyzer_tool</a></li><li><a href="#method.rustc_legacy_const_generics" title="rustc_legacy_const_generics">rustc_legacy_const_generics</a></li></ul><h3><a href="#deref-methods-%5BAttr%5D">Methods from Deref<<wbr>Target=[<wbr>Attr]></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_windows" title="array_windows">array_windows</a></li><li><a href="#method.as_array" title="as_array">as_array</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_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.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.concat" title="concat">concat</a></li><li><a href="#method.connect" title="connect">connect</a></li><li><a href="#method.contains" title="contains">contains</a></li><li><a href="#method.element_offset" title="element_offset">element_offset</a></li><li><a href="#method.ends_with" title="ends_with">ends_with</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-1" title="get">get</a></li><li><a href="#method.get_unchecked" title="get_unchecked">get_unchecked</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.join" title="join">join</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" 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.repeat" title="repeat">repeat</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.to_vec" title="to_vec">to_vec</a></li><li><a href="#method.to_vec_in" title="to_vec_in">to_vec_in</a></li><li><a href="#method.trim_prefix" title="trim_prefix">trim_prefix</a></li><li><a href="#method.trim_suffix" title="trim_suffix">trim_suffix</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-Clone-for-Attrs" title="Clone">Clone</a></li><li><a href="#impl-Debug-for-Attrs" title="Debug">Debug</a></li><li><a href="#impl-Default-for-Attrs" title="Default">Default</a></li><li><a href="#impl-Deref-for-Attrs" title="Deref">Deref</a></li><li><a href="#impl-Eq-for-Attrs" title="Eq">Eq</a></li><li><a href="#impl-PartialEq-for-Attrs" title="PartialEq">PartialEq</a></li><li><a href="#impl-StructuralPartialEq-for-Attrs" title="StructuralPartialEq">StructuralPartialEq</a></li></ul><h3><a href="#synthetic-implementations">Auto Trait Implementations</a></h3><ul class="block synthetic-implementation"><li><a href="#impl-RefUnwindSafe-for-Attrs" title="!RefUnwindSafe">!RefUnwindSafe</a></li><li><a href="#impl-UnwindSafe-for-Attrs" title="!UnwindSafe">!UnwindSafe</a></li><li><a href="#impl-Freeze-for-Attrs" title="Freeze">Freeze</a></li><li><a href="#impl-Send-for-Attrs" title="Send">Send</a></li><li><a href="#impl-Sync-for-Attrs" title="Sync">Sync</a></li><li><a href="#impl-Unpin-for-Attrs" title="Unpin">Unpin</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<T>">Borrow<T></a></li><li><a href="#impl-BorrowMut%3CT%3E-for-T" title="BorrowMut<T>">BorrowMut<T></a></li><li><a href="#impl-Captures%3C'a%3E-for-T" title="Captures<'a>">Captures<'a></a></li><li><a href="#impl-Cast-for-T" title="Cast">Cast</a></li><li><a href="#impl-CloneToUninit-for-T" title="CloneToUninit">CloneToUninit</a></li><li><a href="#impl-CollectAndApply%3CT,+R%3E-for-T" title="CollectAndApply<T, R>">CollectAndApply<T, R></a></li><li><a href="#impl-Equivalent%3CK%3E-for-Q" title="Equivalent<K>">Equivalent<K></a></li><li><a href="#impl-Equivalent%3CK%3E-for-Q-1" title="Equivalent<K>">Equivalent<K></a></li><li><a href="#impl-From%3CT%3E-for-T" title="From<T>">From<T></a></li><li><a href="#impl-Instrument-for-T" title="Instrument">Instrument</a></li><li><a href="#impl-Into%3CU%3E-for-T" title="Into<U>">Into<U></a></li><li><a href="#impl-IntoBox%3Cdyn+Any+%2B+Send%3E-for-T" title="IntoBox<dyn Any + Send>">IntoBox<dyn Any + Send></a></li><li><a href="#impl-IntoBox%3Cdyn+Any+%2B+Send+%2B+Sync%3E-for-T" title="IntoBox<dyn Any + Sync + Send>">IntoBox<dyn Any + Sync + Send></a></li><li><a href="#impl-IntoBox%3Cdyn+Any%3E-for-T" title="IntoBox<dyn Any>">IntoBox<dyn Any></a></li><li><a href="#impl-IntoEither-for-T" title="IntoEither">IntoEither</a></li><li><a href="#impl-Pointable-for-T" title="Pointable">Pointable</a></li><li><a href="#impl-Receiver-for-P" title="Receiver">Receiver</a></li><li><a href="#impl-ToOwned-for-T" title="ToOwned">ToOwned</a></li><li><a href="#impl-TryFrom%3CU%3E-for-T" title="TryFrom<U>">TryFrom<U></a></li><li><a href="#impl-TryInto%3CU%3E-for-T" title="TryInto<U>">TryInto<U></a></li><li><a href="#impl-Upcast%3CI,+U%3E-for-T" title="Upcast<I, U>">Upcast<I, U></a></li><li><a href="#impl-UpcastFrom%3CI,+T%3E-for-T" title="UpcastFrom<I, T>">UpcastFrom<I, T></a></li><li><a href="#impl-WithSubscriber-for-T" title="WithSubscriber">WithSubscriber</a></li></ul></section><div id="rustdoc-modnav"><h2 class="in-crate"><a href="index.html">In crate hir</a></h2></div></div></nav><div class="sidebar-resizer" title="Drag to resize sidebar"></div><main><div class="width-limiter"><rustdoc-search></rustdoc-search><section id="main-content" class="content"><div class="main-heading"><div class="rustdoc-breadcrumbs"><a href="index.html">hir</a></div><h1>Struct <span class="struct">Attrs</span><button id="copy-path" title="Copy item path to clipboard">Copy item path</button></h1><rustdoc-toolbar></rustdoc-toolbar><span class="sub-heading"></span></div><pre class="rust item-decl"><code>pub struct Attrs(<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>Desugared attributes of an item post <code>cfg_attr</code> expansion.</p> |
| </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-Attrs" class="impl"><a href="#impl-Attrs" class="anchor">§</a><h3 class="code-header">impl <a class="struct" href="struct.Attrs.html" title="struct hir::Attrs">Attrs</a></h3></section></summary><div class="impl-items"><section id="method.new" class="method"><h4 class="code-header">pub fn <a href="#method.new" class="fn">new</a>( |
| db: &(dyn <a class="trait" href="db/trait.DefDatabase.html" title="trait hir::db::DefDatabase">DefDatabase</a> + 'static), |
| owner: &dyn HasAttrs, |
| span_map: SpanMapRef<'_>, |
| cfg_options: &<a class="struct" href="struct.CfgOptions.html" title="struct hir::CfgOptions">CfgOptions</a>, |
| ) -> <a class="struct" href="struct.Attrs.html" title="struct hir::Attrs">Attrs</a></h4></section><section id="method.get" class="method"><h4 class="code-header">pub fn <a href="#method.get" class="fn">get</a>(&self, id: <a class="struct" href="struct.AttrId.html" title="struct hir::AttrId">AttrId</a>) -> <a class="enum" href="https://doc.rust-lang.org/1.90.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><&<a class="struct" href="struct.Attr.html" title="struct hir::Attr">Attr</a>></h4></section></div></details><details class="toggle implementors-toggle" open><summary><section id="impl-Attrs-1" class="impl"><a href="#impl-Attrs-1" class="anchor">§</a><h3 class="code-header">impl <a class="struct" href="struct.Attrs.html" title="struct hir::Attrs">Attrs</a></h3></section></summary><div class="impl-items"><section id="associatedconstant.EMPTY" class="associatedconstant"><h4 class="code-header">pub const <a href="#associatedconstant.EMPTY" class="constant">EMPTY</a>: <a class="struct" href="struct.Attrs.html" title="struct hir::Attrs">Attrs</a></h4></section></div></details><details class="toggle implementors-toggle" open><summary><section id="impl-Attrs-2" class="impl"><a href="#impl-Attrs-2" class="anchor">§</a><h3 class="code-header">impl <a class="struct" href="struct.Attrs.html" title="struct hir::Attrs">Attrs</a></h3></section></summary><div class="impl-items"><section id="method.by_key" class="method"><h4 class="code-header">pub fn <a href="#method.by_key" class="fn">by_key</a>(&self, key: <a class="struct" href="struct.Symbol.html" title="struct hir::Symbol">Symbol</a>) -> AttrQuery<'_></h4></section><section id="method.rust_analyzer_tool" class="method"><h4 class="code-header">pub fn <a href="#method.rust_analyzer_tool" class="fn">rust_analyzer_tool</a>(&self) -> impl <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/iter/traits/iterator/trait.Iterator.html" title="trait core::iter::traits::iterator::Iterator">Iterator</a><Item = &<a class="struct" href="struct.Attr.html" title="struct hir::Attr">Attr</a>></h4></section><section id="method.cfg" class="method"><h4 class="code-header">pub fn <a href="#method.cfg" class="fn">cfg</a>(&self) -> <a class="enum" href="https://doc.rust-lang.org/1.90.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><<a class="enum" href="enum.CfgExpr.html" title="enum hir::CfgExpr">CfgExpr</a>></h4></section><section id="method.cfgs" class="method"><h4 class="code-header">pub fn <a href="#method.cfgs" class="fn">cfgs</a>(&self) -> impl <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/iter/traits/iterator/trait.Iterator.html" title="trait core::iter::traits::iterator::Iterator">Iterator</a><Item = <a class="enum" href="enum.CfgExpr.html" title="enum hir::CfgExpr">CfgExpr</a>></h4></section><section id="method.lang" class="method"><h4 class="code-header">pub fn <a href="#method.lang" class="fn">lang</a>(&self) -> <a class="enum" href="https://doc.rust-lang.org/1.90.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><&<a class="struct" href="struct.Symbol.html" title="struct hir::Symbol">Symbol</a>></h4></section><section id="method.lang_item" class="method"><h4 class="code-header">pub fn <a href="#method.lang_item" class="fn">lang_item</a>(&self) -> <a class="enum" href="https://doc.rust-lang.org/1.90.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><<a class="enum" href="enum.LangItem.html" title="enum hir::LangItem">LangItem</a>></h4></section><section id="method.has_doc_hidden" class="method"><h4 class="code-header">pub fn <a href="#method.has_doc_hidden" class="fn">has_doc_hidden</a>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.bool.html">bool</a></h4></section><section id="method.has_doc_notable_trait" class="method"><h4 class="code-header">pub fn <a href="#method.has_doc_notable_trait" class="fn">has_doc_notable_trait</a>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.bool.html">bool</a></h4></section><section id="method.doc_exprs" class="method"><h4 class="code-header">pub fn <a href="#method.doc_exprs" class="fn">doc_exprs</a>(&self) -> impl <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/iter/traits/iterator/trait.Iterator.html" title="trait core::iter::traits::iterator::Iterator">Iterator</a><Item = DocExpr></h4></section><section id="method.doc_aliases" class="method"><h4 class="code-header">pub fn <a href="#method.doc_aliases" class="fn">doc_aliases</a>(&self) -> impl <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/iter/traits/iterator/trait.Iterator.html" title="trait core::iter::traits::iterator::Iterator">Iterator</a><Item = <a class="struct" href="struct.Symbol.html" title="struct hir::Symbol">Symbol</a>></h4></section><section id="method.export_name" class="method"><h4 class="code-header">pub fn <a href="#method.export_name" class="fn">export_name</a>(&self) -> <a class="enum" href="https://doc.rust-lang.org/1.90.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><&<a class="struct" href="struct.Symbol.html" title="struct hir::Symbol">Symbol</a>></h4></section><section id="method.is_proc_macro" class="method"><h4 class="code-header">pub fn <a href="#method.is_proc_macro" class="fn">is_proc_macro</a>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.bool.html">bool</a></h4></section><section id="method.is_proc_macro_attribute" class="method"><h4 class="code-header">pub fn <a href="#method.is_proc_macro_attribute" class="fn">is_proc_macro_attribute</a>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.bool.html">bool</a></h4></section><section id="method.is_proc_macro_derive" class="method"><h4 class="code-header">pub fn <a href="#method.is_proc_macro_derive" class="fn">is_proc_macro_derive</a>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.bool.html">bool</a></h4></section><section id="method.is_test" class="method"><h4 class="code-header">pub fn <a href="#method.is_test" class="fn">is_test</a>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.bool.html">bool</a></h4></section><section id="method.is_ignore" class="method"><h4 class="code-header">pub fn <a href="#method.is_ignore" class="fn">is_ignore</a>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.bool.html">bool</a></h4></section><section id="method.is_bench" class="method"><h4 class="code-header">pub fn <a href="#method.is_bench" class="fn">is_bench</a>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.bool.html">bool</a></h4></section><section id="method.is_unstable" class="method"><h4 class="code-header">pub fn <a href="#method.is_unstable" class="fn">is_unstable</a>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.bool.html">bool</a></h4></section><section id="method.rustc_legacy_const_generics" class="method"><h4 class="code-header">pub fn <a href="#method.rustc_legacy_const_generics" class="fn">rustc_legacy_const_generics</a>(&self) -> <a class="enum" href="https://doc.rust-lang.org/1.90.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><<a class="struct" href="https://doc.rust-lang.org/1.90.0/alloc/boxed/struct.Box.html" title="struct alloc::boxed::Box">Box</a><<a class="struct" href="https://doc.rust-lang.org/1.90.0/alloc/boxed/struct.Box.html" title="struct alloc::boxed::Box">Box</a><[<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.u32.html">u32</a>]>>></h4></section><section id="method.repr" class="method"><h4 class="code-header">pub fn <a href="#method.repr" class="fn">repr</a>(&self) -> <a class="enum" href="https://doc.rust-lang.org/1.90.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><ReprOptions></h4></section></div></details><details class="toggle implementors-toggle" open><summary><section id="impl-Attrs-3" class="impl"><a href="#impl-Attrs-3" class="anchor">§</a><h3 class="code-header">impl <a class="struct" href="struct.Attrs.html" title="struct hir::Attrs">Attrs</a></h3></section></summary><div class="impl-items"><section id="method.parse_proc_macro_decl" class="method"><h4 class="code-header">pub fn <a href="#method.parse_proc_macro_decl" class="fn">parse_proc_macro_decl</a>(&self, func_name: &<a class="struct" href="struct.Name.html" title="struct hir::Name">Name</a>) -> <a class="enum" href="https://doc.rust-lang.org/1.90.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><ProcMacroDef></h4></section><section id="method.parse_proc_macro_derive" class="method"><h4 class="code-header">pub fn <a href="#method.parse_proc_macro_derive" class="fn">parse_proc_macro_derive</a>(&self) -> <a class="enum" href="https://doc.rust-lang.org/1.90.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><(<a class="struct" href="struct.Name.html" title="struct hir::Name">Name</a>, <a class="struct" href="https://doc.rust-lang.org/1.90.0/alloc/boxed/struct.Box.html" title="struct alloc::boxed::Box">Box</a><[<a class="struct" href="struct.Name.html" title="struct hir::Name">Name</a>]>)></h4></section><section id="method.parse_rustc_builtin_macro" class="method"><h4 class="code-header">pub fn <a href="#method.parse_rustc_builtin_macro" class="fn">parse_rustc_builtin_macro</a>(&self) -> <a class="enum" href="https://doc.rust-lang.org/1.90.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><(<a class="struct" href="struct.Name.html" title="struct hir::Name">Name</a>, <a class="struct" href="https://doc.rust-lang.org/1.90.0/alloc/boxed/struct.Box.html" title="struct alloc::boxed::Box">Box</a><[<a class="struct" href="struct.Name.html" title="struct hir::Name">Name</a>]>)></h4></section></div></details></div><details class="toggle big-toggle" open><summary><h2 id="deref-methods-%5BAttr%5D" class="section-header"><span>Methods from <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/ops/deref/trait.Deref.html" title="trait core::ops::deref::Deref">Deref</a><Target = [<a class="struct" href="struct.Attr.html" title="struct hir::Attr">Attr</a>]></span><a href="#deref-methods-%5BAttr%5D" class="anchor">§</a></h2></summary><div id="deref-methods-%5BAttr%5D-1" class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.len" 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/1.90.0/src/core/slice/mod.rs.html#114">Source</a></span><h4 class="code-header">pub fn <a href="#method.len" class="fn">len</a>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.usize.html">usize</a></h4></section></summary><div class="docblock"><p>Returns the number of elements in the slice.</p> |
| <h5 id="examples"><a class="doc-anchor" href="#examples">§</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/1.90.0/src/core/slice/mod.rs.html#134">Source</a></span><h4 class="code-header">pub fn <a href="#method.is_empty" class="fn">is_empty</a>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/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-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">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">&</span>[i32] = <span class="kw-2">&</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/1.90.0/src/core/slice/mod.rs.html#153">Source</a></span><h4 class="code-header">pub fn <a href="#method.first" class="fn">first</a>(&self) -> <a class="enum" href="https://doc.rust-lang.org/1.90.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.reference.html">&T</a>></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-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">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">&</span><span class="number">10</span>), v.first()); |
| |
| <span class="kw">let </span>w: <span class="kw-2">&</span>[i32] = <span class="kw-2">&</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/1.90.0/src/core/slice/mod.rs.html#196">Source</a></span><h4 class="code-header">pub fn <a href="#method.split_first" class="fn">split_first</a>(&self) -> <a class="enum" href="https://doc.rust-lang.org/1.90.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><(<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.reference.html">&T</a>, &<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.slice.html">[T]</a>)></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-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">let </span>x = <span class="kw-2">&</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">&</span><span class="number">0</span>); |
| <span class="macro">assert_eq!</span>(elements, <span class="kw-2">&</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/1.90.0/src/core/slice/mod.rs.html#238">Source</a></span><h4 class="code-header">pub fn <a href="#method.split_last" class="fn">split_last</a>(&self) -> <a class="enum" href="https://doc.rust-lang.org/1.90.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><(<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.reference.html">&T</a>, &<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.slice.html">[T]</a>)></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-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">let </span>x = <span class="kw-2">&</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">&</span><span class="number">2</span>); |
| <span class="macro">assert_eq!</span>(elements, <span class="kw-2">&</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/1.90.0/src/core/slice/mod.rs.html#279">Source</a></span><h4 class="code-header">pub fn <a href="#method.last" class="fn">last</a>(&self) -> <a class="enum" href="https://doc.rust-lang.org/1.90.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.reference.html">&T</a>></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-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">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">&</span><span class="number">30</span>), v.last()); |
| |
| <span class="kw">let </span>w: <span class="kw-2">&</span>[i32] = <span class="kw-2">&</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/1.90.0/src/core/slice/mod.rs.html#325">Source</a></span><h4 class="code-header">pub fn <a href="#method.first_chunk" class="fn">first_chunk</a><const N: <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.usize.html">usize</a>>(&self) -> <a class="enum" href="https://doc.rust-lang.org/1.90.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><&<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.array.html">[T; N]</a>></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-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>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">&</span>[<span class="number">10</span>, <span class="number">40</span>]), u.first_chunk::<<span class="number">2</span>>()); |
| |
| <span class="kw">let </span>v: <span class="kw-2">&</span>[i32] = <span class="kw-2">&</span>[<span class="number">10</span>]; |
| <span class="macro">assert_eq!</span>(<span class="prelude-val">None</span>, v.first_chunk::<<span class="number">2</span>>()); |
| |
| <span class="kw">let </span>w: <span class="kw-2">&</span>[i32] = <span class="kw-2">&</span>[]; |
| <span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="kw-2">&</span>[]), w.first_chunk::<<span class="number">0</span>>());</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/1.90.0/src/core/slice/mod.rs.html#385">Source</a></span><h4 class="code-header">pub fn <a href="#method.split_first_chunk" class="fn">split_first_chunk</a><const N: <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.usize.html">usize</a>>(&self) -> <a class="enum" href="https://doc.rust-lang.org/1.90.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><(&<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.array.html">[T; N]</a>, &<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.slice.html">[T]</a>)></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-7"><a class="doc-anchor" href="#examples-7">§</a>Examples</h5> |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>x = <span class="kw-2">&</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::<<span class="number">2</span>>() { |
| <span class="macro">assert_eq!</span>(first, <span class="kw-2">&</span>[<span class="number">0</span>, <span class="number">1</span>]); |
| <span class="macro">assert_eq!</span>(elements, <span class="kw-2">&</span>[<span class="number">2</span>]); |
| } |
| |
| <span class="macro">assert_eq!</span>(<span class="prelude-val">None</span>, x.split_first_chunk::<<span class="number">4</span>>());</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/1.90.0/src/core/slice/mod.rs.html#445">Source</a></span><h4 class="code-header">pub fn <a href="#method.split_last_chunk" class="fn">split_last_chunk</a><const N: <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.usize.html">usize</a>>(&self) -> <a class="enum" href="https://doc.rust-lang.org/1.90.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><(&<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.slice.html">[T]</a>, &<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.array.html">[T; N]</a>)></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-8"><a class="doc-anchor" href="#examples-8">§</a>Examples</h5> |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>x = <span class="kw-2">&</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::<<span class="number">2</span>>() { |
| <span class="macro">assert_eq!</span>(elements, <span class="kw-2">&</span>[<span class="number">0</span>]); |
| <span class="macro">assert_eq!</span>(last, <span class="kw-2">&</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::<<span class="number">4</span>>());</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/1.90.0/src/core/slice/mod.rs.html#507">Source</a></span><h4 class="code-header">pub fn <a href="#method.last_chunk" class="fn">last_chunk</a><const N: <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.usize.html">usize</a>>(&self) -> <a class="enum" href="https://doc.rust-lang.org/1.90.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><&<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.array.html">[T; N]</a>></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-9"><a class="doc-anchor" href="#examples-9">§</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">&</span>[<span class="number">40</span>, <span class="number">30</span>]), u.last_chunk::<<span class="number">2</span>>()); |
| |
| <span class="kw">let </span>v: <span class="kw-2">&</span>[i32] = <span class="kw-2">&</span>[<span class="number">10</span>]; |
| <span class="macro">assert_eq!</span>(<span class="prelude-val">None</span>, v.last_chunk::<<span class="number">2</span>>()); |
| |
| <span class="kw">let </span>w: <span class="kw-2">&</span>[i32] = <span class="kw-2">&</span>[]; |
| <span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="kw-2">&</span>[]), w.last_chunk::<<span class="number">0</span>>());</code></pre></div> |
| </div></details><details class="toggle method-toggle" open><summary><section id="method.get-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/1.90.0/src/core/slice/mod.rs.html#570-572">Source</a></span><h4 class="code-header">pub fn <a href="#method.get-1" class="fn">get</a><I>(&self, index: I) -> <a class="enum" href="https://doc.rust-lang.org/1.90.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><&<I as <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/slice/index/trait.SliceIndex.html" title="trait core::slice::index::SliceIndex">SliceIndex</a><<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.slice.html">[T]</a>>>::<a class="associatedtype" href="https://doc.rust-lang.org/1.90.0/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/1.90.0/core/slice/index/trait.SliceIndex.html" title="trait core::slice::index::SliceIndex">SliceIndex</a><<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.slice.html">[T]</a>>,</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-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>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">&</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">&</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/1.90.0/src/core/slice/mod.rs.html#637-639">Source</a></span><h4 class="code-header">pub unsafe fn <a href="#method.get_unchecked" class="fn">get_unchecked</a><I>( |
| &self, |
| index: I, |
| ) -> &<I as <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/slice/index/trait.SliceIndex.html" title="trait core::slice::index::SliceIndex">SliceIndex</a><<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.slice.html">[T]</a>>>::<a class="associatedtype" href="https://doc.rust-lang.org/1.90.0/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/1.90.0/core/slice/index/trait.SliceIndex.html" title="trait core::slice::index::SliceIndex">SliceIndex</a><<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.slice.html">[T]</a>>,</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/1.90.0/std/primitive.slice.html#method.get" title="method slice::get"><code>get</code></a>.</p> |
| <h5 id="safety"><a class="doc-anchor" href="#safety">§</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-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>x = <span class="kw-2">&</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">&</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/1.90.0/src/core/slice/mod.rs.html#724">Source</a></span><h4 class="code-header">pub fn <a href="#method.as_ptr" class="fn">as_ptr</a>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/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/1.90.0/std/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-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>x = <span class="kw-2">&</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">&*</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/1.90.0/src/core/slice/mod.rs.html#791">Source</a></span><h4 class="code-header">pub fn <a href="#method.as_ptr_range" class="fn">as_ptr_range</a>(&self) -> <a class="struct" href="https://doc.rust-lang.org/1.90.0/core/ops/range/struct.Range.html" title="struct core::ops::range::Range">Range</a><<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.pointer.html">*const T</a>></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/1.90.0/std/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">&</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">&</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">&</span>x)); |
| <span class="macro">assert!</span>(!a.as_ptr_range().contains(<span class="kw-2">&</span>y));</code></pre></div> |
| </div></details><details class="toggle method-toggle" open><summary><section id="method.as_array" class="method"><a class="src rightside" href="https://doc.rust-lang.org/1.90.0/src/core/slice/mod.rs.html#847">Source</a><h4 class="code-header">pub fn <a href="#method.as_array" class="fn">as_array</a><const N: <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.usize.html">usize</a>>(&self) -> <a class="enum" href="https://doc.rust-lang.org/1.90.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><&<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/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_array</code>)</span></div></span></summary><div class="docblock"><p>Gets a reference to the underlying array.</p> |
| <p>If <code>N</code> is not exactly equal to the length of <code>self</code>, then this method returns <code>None</code>.</p> |
| </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/1.90.0/src/core/slice/mod.rs.html#1036">Source</a></span><h4 class="code-header">pub fn <a href="#method.iter" class="fn">iter</a>(&self) -> <a class="struct" href="https://doc.rust-lang.org/1.90.0/core/slice/iter/struct.Iter.html" title="struct core::slice::iter::Iter">Iter</a><'_, T></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-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">&</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">&</span><span class="number">1</span>)); |
| <span class="macro">assert_eq!</span>(iterator.next(), <span class="prelude-val">Some</span>(<span class="kw-2">&</span><span class="number">2</span>)); |
| <span class="macro">assert_eq!</span>(iterator.next(), <span class="prelude-val">Some</span>(<span class="kw-2">&</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/1.90.0/src/core/slice/mod.rs.html#1111">Source</a></span><h4 class="code-header">pub fn <a href="#method.windows" class="fn">windows</a>(&self, size: <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.usize.html">usize</a>) -> <a class="struct" href="https://doc.rust-lang.org/1.90.0/core/slice/iter/struct.Windows.html" title="struct core::slice::iter::Windows">Windows</a><'_, T></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 zero.</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>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">&</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">&</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">&</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>Because the <a href="https://doc.rust-lang.org/1.90.0/core/iter/traits/iterator/trait.Iterator.html" title="trait core::iter::traits::iterator::Iterator">Iterator</a> trait cannot represent the required lifetimes, |
| there is no <code>windows_mut</code> analog to <code>windows</code>; |
| <code>[0,1,2].windows_mut(2).collect()</code> would violate <a href="https://doc.rust-lang.org/book/ch04-02-references-and-borrowing.html#the-rules-of-references">the rules of references</a> |
| (though a <a href="https://blog.rust-lang.org/2022/10/28/gats-stabilization.html">LendingIterator</a> analog is possible). You can sometimes use |
| <a href="https://doc.rust-lang.org/1.90.0/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> instead:</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">&mut </span>array[..]; |
| <span class="kw">let </span>slice_of_cells: <span class="kw-2">&</span>[Cell<char>] = 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">&</span>w[<span class="number">0</span>], <span class="kw-2">&</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/1.90.0/src/core/slice/mod.rs.html#1151">Source</a></span><h4 class="code-header">pub fn <a href="#method.chunks" class="fn">chunks</a>(&self, chunk_size: <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.usize.html">usize</a>) -> <a class="struct" href="https://doc.rust-lang.org/1.90.0/core/slice/iter/struct.Chunks.html" title="struct core::slice::iter::Chunks">Chunks</a><'_, T></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/1.90.0/std/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/1.90.0/std/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> |
| <p>If your <code>chunk_size</code> is a constant, consider using <a href="https://doc.rust-lang.org/1.90.0/std/primitive.slice.html#method.as_chunks" title="method slice::as_chunks"><code>as_chunks</code></a> instead, which will |
| give references to arrays of exactly that length, rather than slices.</p> |
| <h5 id="panics-1"><a class="doc-anchor" href="#panics-1">§</a>Panics</h5> |
| <p>Panics if <code>chunk_size</code> is zero.</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>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">&</span>[<span class="string">'l'</span>, <span class="string">'o'</span>]); |
| <span class="macro">assert_eq!</span>(iter.next().unwrap(), <span class="kw-2">&</span>[<span class="string">'r'</span>, <span class="string">'e'</span>]); |
| <span class="macro">assert_eq!</span>(iter.next().unwrap(), <span class="kw-2">&</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/1.90.0/src/core/slice/mod.rs.html#1238">Source</a></span><h4 class="code-header">pub fn <a href="#method.chunks_exact" class="fn">chunks_exact</a>(&self, chunk_size: <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.usize.html">usize</a>) -> <a class="struct" href="https://doc.rust-lang.org/1.90.0/core/slice/iter/struct.ChunksExact.html" title="struct core::slice::iter::ChunksExact">ChunksExact</a><'_, T></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/1.90.0/std/primitive.slice.html#method.chunks" title="method slice::chunks"><code>chunks</code></a>.</p> |
| <p>See <a href="https://doc.rust-lang.org/1.90.0/std/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/1.90.0/std/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> |
| <p>If your <code>chunk_size</code> is a constant, consider using <a href="https://doc.rust-lang.org/1.90.0/std/primitive.slice.html#method.as_chunks" title="method slice::as_chunks"><code>as_chunks</code></a> instead, which will |
| give references to arrays of exactly that length, rather than slices.</p> |
| <h5 id="panics-2"><a class="doc-anchor" href="#panics-2">§</a>Panics</h5> |
| <p>Panics if <code>chunk_size</code> is zero.</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>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">&</span>[<span class="string">'l'</span>, <span class="string">'o'</span>]); |
| <span class="macro">assert_eq!</span>(iter.next().unwrap(), <span class="kw-2">&</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">&</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"><span class="rightside"><span class="since" title="Stable since Rust version 1.88.0">1.88.0</span> · <a class="src" href="https://doc.rust-lang.org/1.90.0/src/core/slice/mod.rs.html#1334">Source</a></span><h4 class="code-header">pub unsafe fn <a href="#method.as_chunks_unchecked" class="fn">as_chunks_unchecked</a><const N: <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.usize.html">usize</a>>(&self) -> &[<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.array.html">[T; N]</a>]</h4></section></summary><div class="docblock"><p>Splits the slice into a slice of <code>N</code>-element arrays, |
| assuming that there’s no remainder.</p> |
| <p>This is the inverse operation to <a href="https://doc.rust-lang.org/1.90.0/std/primitive.slice.html#method.as_flattened" title="method slice::as_flattened"><code>as_flattened</code></a>.</p> |
| <p>As this is <code>unsafe</code>, consider whether you could use <a href="https://doc.rust-lang.org/1.90.0/std/primitive.slice.html#method.as_chunks" title="method slice::as_chunks"><code>as_chunks</code></a> or |
| <a href="https://doc.rust-lang.org/1.90.0/std/primitive.slice.html#method.as_rchunks" title="method slice::as_rchunks"><code>as_rchunks</code></a> instead, perhaps via something like |
| <code>if let (chunks, []) = slice.as_chunks()</code> or |
| <code>let (chunks, []) = slice.as_chunks() else { unreachable!() };</code>.</p> |
| <h5 id="safety-1"><a class="doc-anchor" href="#safety-1">§</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-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>slice: <span class="kw-2">&</span>[char] = <span class="kw-2">&</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">&</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">&</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">&</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">&</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: &[[_; 5]] = slice.as_chunks_unchecked() // The slice length is not a multiple of 5 |
| // let chunks: &[[_; 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"><span class="rightside"><span class="since" title="Stable since Rust version 1.88.0">1.88.0</span> · <a class="src" href="https://doc.rust-lang.org/1.90.0/src/core/slice/mod.rs.html#1392">Source</a></span><h4 class="code-header">pub fn <a href="#method.as_chunks" class="fn">as_chunks</a><const N: <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.usize.html">usize</a>>(&self) -> (&[<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.array.html">[T; N]</a>], &<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.slice.html">[T]</a>)</h4></section></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> |
| <p>The remainder is meaningful in the division sense. Given |
| <code>let (chunks, remainder) = slice.as_chunks()</code>, then:</p> |
| <ul> |
| <li><code>chunks.len()</code> equals <code>slice.len() / N</code>,</li> |
| <li><code>remainder.len()</code> equals <code>slice.len() % N</code>, and</li> |
| <li><code>slice.len()</code> equals <code>chunks.len() * N + remainder.len()</code>.</li> |
| </ul> |
| <p>You can flatten the chunks back into a slice-of-<code>T</code> with <a href="https://doc.rust-lang.org/1.90.0/std/primitive.slice.html#method.as_flattened" title="method slice::as_flattened"><code>as_flattened</code></a>.</p> |
| <h5 id="panics-3"><a class="doc-anchor" href="#panics-3">§</a>Panics</h5> |
| <p>Panics if <code>N</code> is zero.</p> |
| <p>Note that this check is against a const generic parameter, not a runtime |
| value, and thus a particular monomorphization will either always panic |
| or it will never panic.</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>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">&</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">&</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="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::<<span class="number">2</span>>() <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">&</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"><span class="rightside"><span class="since" title="Stable since Rust version 1.88.0">1.88.0</span> · <a class="src" href="https://doc.rust-lang.org/1.90.0/src/core/slice/mod.rs.html#1439">Source</a></span><h4 class="code-header">pub fn <a href="#method.as_rchunks" class="fn">as_rchunks</a><const N: <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.usize.html">usize</a>>(&self) -> (&<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.slice.html">[T]</a>, &[<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.array.html">[T; N]</a>])</h4></section></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> |
| <p>The remainder is meaningful in the division sense. Given |
| <code>let (remainder, chunks) = slice.as_rchunks()</code>, then:</p> |
| <ul> |
| <li><code>remainder.len()</code> equals <code>slice.len() % N</code>,</li> |
| <li><code>chunks.len()</code> equals <code>slice.len() / N</code>, and</li> |
| <li><code>slice.len()</code> equals <code>chunks.len() * N + remainder.len()</code>.</li> |
| </ul> |
| <p>You can flatten the chunks back into a slice-of-<code>T</code> with <a href="https://doc.rust-lang.org/1.90.0/std/primitive.slice.html#method.as_flattened" title="method slice::as_flattened"><code>as_flattened</code></a>.</p> |
| <h5 id="panics-4"><a class="doc-anchor" href="#panics-4">§</a>Panics</h5> |
| <p>Panics if <code>N</code> is zero.</p> |
| <p>Note that this check is against a const generic parameter, not a runtime |
| value, and thus a particular monomorphization will either always panic |
| or it will never panic.</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>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">&</span>[<span class="string">'l'</span>]); |
| <span class="macro">assert_eq!</span>(chunks, <span class="kw-2">&</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_windows" class="method"><a class="src rightside" href="https://doc.rust-lang.org/1.90.0/src/core/slice/mod.rs.html#1640">Source</a><h4 class="code-header">pub fn <a href="#method.array_windows" class="fn">array_windows</a><const N: <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.usize.html">usize</a>>(&self) -> <a class="struct" href="https://doc.rust-lang.org/1.90.0/core/slice/iter/struct.ArrayWindows.html" title="struct core::slice::iter::ArrayWindows">ArrayWindows</a><'_, T, N></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/1.90.0/std/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-5"><a class="doc-anchor" href="#panics-5">§</a>Panics</h5> |
| <p>Panics if <code>N</code> is zero. This check will most probably get changed to a compile time |
| error before this method gets stabilized.</p> |
| <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="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">&</span>[<span class="number">0</span>, <span class="number">1</span>]); |
| <span class="macro">assert_eq!</span>(iter.next().unwrap(), <span class="kw-2">&</span>[<span class="number">1</span>, <span class="number">2</span>]); |
| <span class="macro">assert_eq!</span>(iter.next().unwrap(), <span class="kw-2">&</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/1.90.0/src/core/slice/mod.rs.html#1680">Source</a></span><h4 class="code-header">pub fn <a href="#method.rchunks" class="fn">rchunks</a>(&self, chunk_size: <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.usize.html">usize</a>) -> <a class="struct" href="https://doc.rust-lang.org/1.90.0/core/slice/iter/struct.RChunks.html" title="struct core::slice::iter::RChunks">RChunks</a><'_, T></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/1.90.0/std/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/1.90.0/std/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> |
| <p>If your <code>chunk_size</code> is a constant, consider using <a href="https://doc.rust-lang.org/1.90.0/std/primitive.slice.html#method.as_rchunks" title="method slice::as_rchunks"><code>as_rchunks</code></a> instead, which will |
| give references to arrays of exactly that length, rather than slices.</p> |
| <h5 id="panics-6"><a class="doc-anchor" href="#panics-6">§</a>Panics</h5> |
| <p>Panics if <code>chunk_size</code> is zero.</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>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">&</span>[<span class="string">'e'</span>, <span class="string">'m'</span>]); |
| <span class="macro">assert_eq!</span>(iter.next().unwrap(), <span class="kw-2">&</span>[<span class="string">'o'</span>, <span class="string">'r'</span>]); |
| <span class="macro">assert_eq!</span>(iter.next().unwrap(), <span class="kw-2">&</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/1.90.0/src/core/slice/mod.rs.html#1769">Source</a></span><h4 class="code-header">pub fn <a href="#method.rchunks_exact" class="fn">rchunks_exact</a>(&self, chunk_size: <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.usize.html">usize</a>) -> <a class="struct" href="https://doc.rust-lang.org/1.90.0/core/slice/iter/struct.RChunksExact.html" title="struct core::slice::iter::RChunksExact">RChunksExact</a><'_, T></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/1.90.0/std/primitive.slice.html#method.rchunks" title="method slice::rchunks"><code>rchunks</code></a>.</p> |
| <p>See <a href="https://doc.rust-lang.org/1.90.0/std/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/1.90.0/std/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> |
| <p>If your <code>chunk_size</code> is a constant, consider using <a href="https://doc.rust-lang.org/1.90.0/std/primitive.slice.html#method.as_rchunks" title="method slice::as_rchunks"><code>as_rchunks</code></a> instead, which will |
| give references to arrays of exactly that length, rather than slices.</p> |
| <h5 id="panics-7"><a class="doc-anchor" href="#panics-7">§</a>Panics</h5> |
| <p>Panics if <code>chunk_size</code> is zero.</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>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">&</span>[<span class="string">'e'</span>, <span class="string">'m'</span>]); |
| <span class="macro">assert_eq!</span>(iter.next().unwrap(), <span class="kw-2">&</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">&</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/1.90.0/src/core/slice/mod.rs.html#1858-1860">Source</a></span><h4 class="code-header">pub fn <a href="#method.chunk_by" class="fn">chunk_by</a><F>(&self, pred: F) -> <a class="struct" href="https://doc.rust-lang.org/1.90.0/core/slice/iter/struct.ChunkBy.html" title="struct core::slice::iter::ChunkBy">ChunkBy</a><'_, T, F><div class="where">where |
| F: <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.reference.html">&T</a>, <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.reference.html">&T</a>) -> <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/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-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>slice = <span class="kw-2">&</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">&</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">&</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">&</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">&</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 <= b); |
| |
| <span class="macro">assert_eq!</span>(iter.next(), <span class="prelude-val">Some</span>(<span class="kw-2">&</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">&</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">&</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/1.90.0/src/core/slice/mod.rs.html#1946">Source</a></span><h4 class="code-header">pub fn <a href="#method.split_at" class="fn">split_at</a>(&self, mid: <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.usize.html">usize</a>) -> (&<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.slice.html">[T]</a>, &<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/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-8"><a class="doc-anchor" href="#panics-8">§</a>Panics</h5> |
| <p>Panics if <code>mid > len</code>. For a non-panicking alternative see |
| <a href="https://doc.rust-lang.org/1.90.0/std/primitive.slice.html#method.split_at_checked" title="method slice::split_at_checked"><code>split_at_checked</code></a>.</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>v = [<span class="string">'a'</span>, <span class="string">'b'</span>, <span class="string">'c'</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="string">'a'</span>, <span class="string">'b'</span>, <span class="string">'c'</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="string">'a'</span>, <span class="string">'b'</span>]); |
| <span class="macro">assert_eq!</span>(right, [<span class="string">'c'</span>]); |
| } |
| |
| { |
| <span class="kw">let </span>(left, right) = v.split_at(<span class="number">3</span>); |
| <span class="macro">assert_eq!</span>(left, [<span class="string">'a'</span>, <span class="string">'b'</span>, <span class="string">'c'</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/1.90.0/src/core/slice/mod.rs.html#2032">Source</a></span><h4 class="code-header">pub unsafe fn <a href="#method.split_at_unchecked" class="fn">split_at_unchecked</a>(&self, mid: <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.usize.html">usize</a>) -> (&<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.slice.html">[T]</a>, &<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/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/1.90.0/std/primitive.slice.html#method.split_at" title="method slice::split_at"><code>split_at</code></a>.</p> |
| <h5 id="safety-2"><a class="doc-anchor" href="#safety-2">§</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 <= mid <= self.len()</code>.</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>v = [<span class="string">'a'</span>, <span class="string">'b'</span>, <span class="string">'c'</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="string">'a'</span>, <span class="string">'b'</span>, <span class="string">'c'</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="string">'a'</span>, <span class="string">'b'</span>]); |
| <span class="macro">assert_eq!</span>(right, [<span class="string">'c'</span>]); |
| } |
| |
| <span class="kw">unsafe </span>{ |
| <span class="kw">let </span>(left, right) = v.split_at_unchecked(<span class="number">3</span>); |
| <span class="macro">assert_eq!</span>(left, [<span class="string">'a'</span>, <span class="string">'b'</span>, <span class="string">'c'</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/1.90.0/src/core/slice/mod.rs.html#2147">Source</a></span><h4 class="code-header">pub fn <a href="#method.split_at_checked" class="fn">split_at_checked</a>(&self, mid: <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.usize.html">usize</a>) -> <a class="enum" href="https://doc.rust-lang.org/1.90.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><(&<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.slice.html">[T]</a>, &<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.slice.html">[T]</a>)></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 > len</code>, returns <code>None</code>.</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>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/1.90.0/src/core/slice/mod.rs.html#2238-2240">Source</a></span><h4 class="code-header">pub fn <a href="#method.split" class="fn">split</a><F>(&self, pred: F) -> <a class="struct" href="https://doc.rust-lang.org/1.90.0/core/slice/iter/struct.Split.html" title="struct core::slice::iter::Split">Split</a><'_, T, F><div class="where">where |
| F: <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.reference.html">&T</a>) -> <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/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-27"><a class="doc-anchor" href="#examples-27">§</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">&</span>[<span class="number">10</span>, <span class="number">40</span>]); |
| <span class="macro">assert_eq!</span>(iter.next().unwrap(), <span class="kw-2">&</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">&</span>[<span class="number">10</span>, <span class="number">40</span>]); |
| <span class="macro">assert_eq!</span>(iter.next().unwrap(), <span class="kw-2">&</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">&</span>[<span class="number">10</span>]); |
| <span class="macro">assert_eq!</span>(iter.next().unwrap(), <span class="kw-2">&</span>[]); |
| <span class="macro">assert_eq!</span>(iter.next().unwrap(), <span class="kw-2">&</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/1.90.0/src/core/slice/mod.rs.html#2296-2298">Source</a></span><h4 class="code-header">pub fn <a href="#method.split_inclusive" class="fn">split_inclusive</a><F>(&self, pred: F) -> <a class="struct" href="https://doc.rust-lang.org/1.90.0/core/slice/iter/struct.SplitInclusive.html" title="struct core::slice::iter::SplitInclusive">SplitInclusive</a><'_, T, F><div class="where">where |
| F: <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.reference.html">&T</a>) -> <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/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-28"><a class="doc-anchor" href="#examples-28">§</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">&</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">&</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">&</span>[<span class="number">3</span>]); |
| <span class="macro">assert_eq!</span>(iter.next().unwrap(), <span class="kw-2">&</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/1.90.0/src/core/slice/mod.rs.html#2356-2358">Source</a></span><h4 class="code-header">pub fn <a href="#method.rsplit" class="fn">rsplit</a><F>(&self, pred: F) -> <a class="struct" href="https://doc.rust-lang.org/1.90.0/core/slice/iter/struct.RSplit.html" title="struct core::slice::iter::RSplit">RSplit</a><'_, T, F><div class="where">where |
| F: <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.reference.html">&T</a>) -> <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/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-29"><a class="doc-anchor" href="#examples-29">§</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">&</span>[<span class="number">44</span>, <span class="number">55</span>]); |
| <span class="macro">assert_eq!</span>(iter.next().unwrap(), <span class="kw-2">&</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">&</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">&</span>[]); |
| <span class="macro">assert_eq!</span>(it.next().unwrap(), <span class="kw-2">&</span>[<span class="number">3</span>, <span class="number">5</span>]); |
| <span class="macro">assert_eq!</span>(it.next().unwrap(), <span class="kw-2">&</span>[<span class="number">1</span>, <span class="number">1</span>]); |
| <span class="macro">assert_eq!</span>(it.next().unwrap(), <span class="kw-2">&</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/1.90.0/src/core/slice/mod.rs.html#2410-2412">Source</a></span><h4 class="code-header">pub fn <a href="#method.splitn" class="fn">splitn</a><F>(&self, n: <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.usize.html">usize</a>, pred: F) -> <a class="struct" href="https://doc.rust-lang.org/1.90.0/core/slice/iter/struct.SplitN.html" title="struct core::slice::iter::SplitN">SplitN</a><'_, T, F><div class="where">where |
| F: <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.reference.html">&T</a>) -> <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/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-30"><a class="doc-anchor" href="#examples-30">§</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/1.90.0/src/core/slice/mod.rs.html#2465-2467">Source</a></span><h4 class="code-header">pub fn <a href="#method.rsplitn" class="fn">rsplitn</a><F>(&self, n: <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.usize.html">usize</a>, pred: F) -> <a class="struct" href="https://doc.rust-lang.org/1.90.0/core/slice/iter/struct.RSplitN.html" title="struct core::slice::iter::RSplitN">RSplitN</a><'_, T, F><div class="where">where |
| F: <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.reference.html">&T</a>) -> <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/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-31"><a class="doc-anchor" href="#examples-31">§</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/1.90.0/src/core/slice/mod.rs.html#2519-2521">Source</a><h4 class="code-header">pub fn <a href="#method.split_once" class="fn">split_once</a><F>(&self, pred: F) -> <a class="enum" href="https://doc.rust-lang.org/1.90.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><(&<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.slice.html">[T]</a>, &<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.slice.html">[T]</a>)><div class="where">where |
| F: <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.reference.html">&T</a>) -> <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/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-32"><a class="doc-anchor" href="#examples-32">§</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">&</span>x| x == <span class="number">2</span>), <span class="prelude-val">Some</span>(( |
| <span class="kw-2">&</span>[<span class="number">1</span>][..], |
| <span class="kw-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">&</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/1.90.0/src/core/slice/mod.rs.html#2547-2549">Source</a><h4 class="code-header">pub fn <a href="#method.rsplit_once" class="fn">rsplit_once</a><F>(&self, pred: F) -> <a class="enum" href="https://doc.rust-lang.org/1.90.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><(&<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.slice.html">[T]</a>, &<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.slice.html">[T]</a>)><div class="where">where |
| F: <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.reference.html">&T</a>) -> <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/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-33"><a class="doc-anchor" href="#examples-33">§</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">&</span>x| x == <span class="number">2</span>), <span class="prelude-val">Some</span>(( |
| <span class="kw-2">&</span>[<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>][..], |
| <span class="kw-2">&</span>[<span class="number">4</span>][..] |
| ))); |
| <span class="macro">assert_eq!</span>(s.rsplit_once(|<span class="kw-2">&</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/1.90.0/src/core/slice/mod.rs.html#2583-2585">Source</a></span><h4 class="code-header">pub fn <a href="#method.contains" class="fn">contains</a>(&self, x: <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.reference.html">&T</a>) -> <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.bool.html">bool</a><div class="where">where |
| T: <a class="trait" href="https://doc.rust-lang.org/1.90.0/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/1.90.0/std/primitive.slice.html#method.binary_search" title="method slice::binary_search"><code>binary_search</code></a> may be faster.</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>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">&</span><span class="number">30</span>)); |
| <span class="macro">assert!</span>(!v.contains(<span class="kw-2">&</span><span class="number">50</span>));</code></pre></div> |
| <p>If you do not have a <code>&T</code>, but some other value that you can compare |
| with one (for example, <code>String</code> implements <code>PartialEq<str></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 `&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/1.90.0/src/core/slice/mod.rs.html#2613-2615">Source</a></span><h4 class="code-header">pub fn <a href="#method.starts_with" class="fn">starts_with</a>(&self, needle: &<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.slice.html">[T]</a>) -> <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.bool.html">bool</a><div class="where">where |
| T: <a class="trait" href="https://doc.rust-lang.org/1.90.0/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-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">10</span>, <span class="number">40</span>, <span class="number">30</span>]; |
| <span class="macro">assert!</span>(v.starts_with(<span class="kw-2">&</span>[<span class="number">10</span>])); |
| <span class="macro">assert!</span>(v.starts_with(<span class="kw-2">&</span>[<span class="number">10</span>, <span class="number">40</span>])); |
| <span class="macro">assert!</span>(v.starts_with(<span class="kw-2">&</span>v)); |
| <span class="macro">assert!</span>(!v.starts_with(<span class="kw-2">&</span>[<span class="number">50</span>])); |
| <span class="macro">assert!</span>(!v.starts_with(<span class="kw-2">&</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">&</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">&</span>[])); |
| <span class="kw">let </span>v: <span class="kw-2">&</span>[u8] = <span class="kw-2">&</span>[]; |
| <span class="macro">assert!</span>(v.starts_with(<span class="kw-2">&</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/1.90.0/src/core/slice/mod.rs.html#2644-2646">Source</a></span><h4 class="code-header">pub fn <a href="#method.ends_with" class="fn">ends_with</a>(&self, needle: &<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.slice.html">[T]</a>) -> <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.bool.html">bool</a><div class="where">where |
| T: <a class="trait" href="https://doc.rust-lang.org/1.90.0/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-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">10</span>, <span class="number">40</span>, <span class="number">30</span>]; |
| <span class="macro">assert!</span>(v.ends_with(<span class="kw-2">&</span>[<span class="number">30</span>])); |
| <span class="macro">assert!</span>(v.ends_with(<span class="kw-2">&</span>[<span class="number">40</span>, <span class="number">30</span>])); |
| <span class="macro">assert!</span>(v.ends_with(<span class="kw-2">&</span>v)); |
| <span class="macro">assert!</span>(!v.ends_with(<span class="kw-2">&</span>[<span class="number">50</span>])); |
| <span class="macro">assert!</span>(!v.ends_with(<span class="kw-2">&</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">&</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">&</span>[])); |
| <span class="kw">let </span>v: <span class="kw-2">&</span>[u8] = <span class="kw-2">&</span>[]; |
| <span class="macro">assert!</span>(v.ends_with(<span class="kw-2">&</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/1.90.0/src/core/slice/mod.rs.html#2676-2678">Source</a></span><h4 class="code-header">pub fn <a href="#method.strip_prefix" class="fn">strip_prefix</a><P>(&self, prefix: <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.reference.html">&P</a>) -> <a class="enum" href="https://doc.rust-lang.org/1.90.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><&<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.slice.html">[T]</a>><div class="where">where |
| P: <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/slice/trait.SlicePattern.html" title="trait core::slice::SlicePattern">SlicePattern</a><Item = T> + ?<a class="trait" href="https://doc.rust-lang.org/1.90.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>, |
| T: <a class="trait" href="https://doc.rust-lang.org/1.90.0/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-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="kw-2">&</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">&</span>[<span class="number">10</span>]), <span class="prelude-val">Some</span>(<span class="kw-2">&</span>[<span class="number">40</span>, <span class="number">30</span>][..])); |
| <span class="macro">assert_eq!</span>(v.strip_prefix(<span class="kw-2">&</span>[<span class="number">10</span>, <span class="number">40</span>]), <span class="prelude-val">Some</span>(<span class="kw-2">&</span>[<span class="number">30</span>][..])); |
| <span class="macro">assert_eq!</span>(v.strip_prefix(<span class="kw-2">&</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">&</span>[][..])); |
| <span class="macro">assert_eq!</span>(v.strip_prefix(<span class="kw-2">&</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">&</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">&</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/1.90.0/src/core/slice/mod.rs.html#2712-2714">Source</a></span><h4 class="code-header">pub fn <a href="#method.strip_suffix" class="fn">strip_suffix</a><P>(&self, suffix: <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.reference.html">&P</a>) -> <a class="enum" href="https://doc.rust-lang.org/1.90.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><&<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.slice.html">[T]</a>><div class="where">where |
| P: <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/slice/trait.SlicePattern.html" title="trait core::slice::SlicePattern">SlicePattern</a><Item = T> + ?<a class="trait" href="https://doc.rust-lang.org/1.90.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>, |
| T: <a class="trait" href="https://doc.rust-lang.org/1.90.0/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-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>v = <span class="kw-2">&</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">&</span>[<span class="number">30</span>]), <span class="prelude-val">Some</span>(<span class="kw-2">&</span>[<span class="number">10</span>, <span class="number">40</span>][..])); |
| <span class="macro">assert_eq!</span>(v.strip_suffix(<span class="kw-2">&</span>[<span class="number">40</span>, <span class="number">30</span>]), <span class="prelude-val">Some</span>(<span class="kw-2">&</span>[<span class="number">10</span>][..])); |
| <span class="macro">assert_eq!</span>(v.strip_suffix(<span class="kw-2">&</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">&</span>[][..])); |
| <span class="macro">assert_eq!</span>(v.strip_suffix(<span class="kw-2">&</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">&</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.trim_prefix" class="method"><a class="src rightside" href="https://doc.rust-lang.org/1.90.0/src/core/slice/mod.rs.html#2755-2757">Source</a><h4 class="code-header">pub fn <a href="#method.trim_prefix" class="fn">trim_prefix</a><P>(&self, prefix: <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.reference.html">&P</a>) -> &<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.slice.html">[T]</a><div class="where">where |
| P: <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/slice/trait.SlicePattern.html" title="trait core::slice::SlicePattern">SlicePattern</a><Item = T> + ?<a class="trait" href="https://doc.rust-lang.org/1.90.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>, |
| T: <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/cmp/trait.PartialEq.html" title="trait core::cmp::PartialEq">PartialEq</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>trim_prefix_suffix</code>)</span></div></span></summary><div class="docblock"><p>Returns a subslice with the optional prefix removed.</p> |
| <p>If the slice starts with <code>prefix</code>, returns the subslice after the prefix. If <code>prefix</code> |
| is empty or the slice does not start with <code>prefix</code>, simply returns the original slice. |
| If <code>prefix</code> is equal to the original slice, returns an empty slice.</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="attr">#![feature(trim_prefix_suffix)] |
| |
| </span><span class="kw">let </span>v = <span class="kw-2">&</span>[<span class="number">10</span>, <span class="number">40</span>, <span class="number">30</span>]; |
| |
| <span class="comment">// Prefix present - removes it |
| </span><span class="macro">assert_eq!</span>(v.trim_prefix(<span class="kw-2">&</span>[<span class="number">10</span>]), <span class="kw-2">&</span>[<span class="number">40</span>, <span class="number">30</span>][..]); |
| <span class="macro">assert_eq!</span>(v.trim_prefix(<span class="kw-2">&</span>[<span class="number">10</span>, <span class="number">40</span>]), <span class="kw-2">&</span>[<span class="number">30</span>][..]); |
| <span class="macro">assert_eq!</span>(v.trim_prefix(<span class="kw-2">&</span>[<span class="number">10</span>, <span class="number">40</span>, <span class="number">30</span>]), <span class="kw-2">&</span>[][..]); |
| |
| <span class="comment">// Prefix absent - returns original slice |
| </span><span class="macro">assert_eq!</span>(v.trim_prefix(<span class="kw-2">&</span>[<span class="number">50</span>]), <span class="kw-2">&</span>[<span class="number">10</span>, <span class="number">40</span>, <span class="number">30</span>][..]); |
| <span class="macro">assert_eq!</span>(v.trim_prefix(<span class="kw-2">&</span>[<span class="number">10</span>, <span class="number">50</span>]), <span class="kw-2">&</span>[<span class="number">10</span>, <span class="number">40</span>, <span class="number">30</span>][..]); |
| |
| <span class="kw">let </span>prefix : <span class="kw-2">&</span>str = <span class="string">"he"</span>; |
| <span class="macro">assert_eq!</span>(<span class="string">b"hello"</span>.trim_prefix(prefix.as_bytes()), <span class="string">b"llo"</span>.as_ref());</code></pre></div> |
| </div></details><details class="toggle method-toggle" open><summary><section id="method.trim_suffix" class="method"><a class="src rightside" href="https://doc.rust-lang.org/1.90.0/src/core/slice/mod.rs.html#2795-2797">Source</a><h4 class="code-header">pub fn <a href="#method.trim_suffix" class="fn">trim_suffix</a><P>(&self, suffix: <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.reference.html">&P</a>) -> &<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.slice.html">[T]</a><div class="where">where |
| P: <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/slice/trait.SlicePattern.html" title="trait core::slice::SlicePattern">SlicePattern</a><Item = T> + ?<a class="trait" href="https://doc.rust-lang.org/1.90.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>, |
| T: <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/cmp/trait.PartialEq.html" title="trait core::cmp::PartialEq">PartialEq</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>trim_prefix_suffix</code>)</span></div></span></summary><div class="docblock"><p>Returns a subslice with the optional suffix removed.</p> |
| <p>If the slice ends with <code>suffix</code>, returns the subslice before the suffix. If <code>suffix</code> |
| is empty or the slice does not end with <code>suffix</code>, simply returns the original slice. |
| If <code>suffix</code> is equal to the original slice, returns an empty slice.</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="attr">#![feature(trim_prefix_suffix)] |
| |
| </span><span class="kw">let </span>v = <span class="kw-2">&</span>[<span class="number">10</span>, <span class="number">40</span>, <span class="number">30</span>]; |
| |
| <span class="comment">// Suffix present - removes it |
| </span><span class="macro">assert_eq!</span>(v.trim_suffix(<span class="kw-2">&</span>[<span class="number">30</span>]), <span class="kw-2">&</span>[<span class="number">10</span>, <span class="number">40</span>][..]); |
| <span class="macro">assert_eq!</span>(v.trim_suffix(<span class="kw-2">&</span>[<span class="number">40</span>, <span class="number">30</span>]), <span class="kw-2">&</span>[<span class="number">10</span>][..]); |
| <span class="macro">assert_eq!</span>(v.trim_suffix(<span class="kw-2">&</span>[<span class="number">10</span>, <span class="number">40</span>, <span class="number">30</span>]), <span class="kw-2">&</span>[][..]); |
| |
| <span class="comment">// Suffix absent - returns original slice |
| </span><span class="macro">assert_eq!</span>(v.trim_suffix(<span class="kw-2">&</span>[<span class="number">50</span>]), <span class="kw-2">&</span>[<span class="number">10</span>, <span class="number">40</span>, <span class="number">30</span>][..]); |
| <span class="macro">assert_eq!</span>(v.trim_suffix(<span class="kw-2">&</span>[<span class="number">50</span>, <span class="number">30</span>]), <span class="kw-2">&</span>[<span class="number">10</span>, <span class="number">40</span>, <span class="number">30</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/1.90.0/src/core/slice/mod.rs.html#2881-2883">Source</a></span><h4 class="code-header">pub fn <a href="#method.binary_search" class="fn">binary_search</a>(&self, x: <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.reference.html">&T</a>) -> <a class="enum" href="https://doc.rust-lang.org/1.90.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.usize.html">usize</a>, <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.usize.html">usize</a>><div class="where">where |
| T: <a class="trait" href="https://doc.rust-lang.org/1.90.0/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/1.90.0/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/1.90.0/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/1.90.0/std/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/1.90.0/std/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/1.90.0/std/primitive.slice.html#method.partition_point" title="method slice::partition_point"><code>partition_point</code></a>.</p> |
| <h5 id="examples-41"><a class="doc-anchor" href="#examples-41">§</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">&</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">&</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">&</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">&</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>) => <span class="bool-val">true</span>, <span class="kw">_ </span>=> <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/1.90.0/std/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 < <span class="kw-2">&</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 <= <span class="kw-2">&</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">&</span><span class="number">1</span>); |
| <span class="macro">assert!</span>((low..high).contains(<span class="kw-2">&</span>r.unwrap())); |
| |
| <span class="macro">assert!</span>(s[..low].iter().all(|<span class="kw-2">&</span>x| x < <span class="number">1</span>)); |
| <span class="macro">assert!</span>(s[low..high].iter().all(|<span class="kw-2">&</span>x| x == <span class="number">1</span>)); |
| <span class="macro">assert!</span>(s[high..].iter().all(|<span class="kw-2">&</span>x| x > <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 < <span class="kw-2">&</span><span class="number">11</span>), <span class="number">9</span>); |
| <span class="macro">assert_eq!</span>(s.partition_point(|x| x <= <span class="kw-2">&</span><span class="number">11</span>), <span class="number">9</span>); |
| <span class="macro">assert_eq!</span>(s.binary_search(<span class="kw-2">&</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/1.90.0/std/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">&</span>x| x <= num); |
| <span class="comment">// If `num` is unique, `s.partition_point(|&x| x < num)` (with `<`) is equivalent to |
| // `s.binary_search(&num).unwrap_or_else(|x| x)`, but using `<=` 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/1.90.0/src/core/slice/mod.rs.html#2932-2934">Source</a></span><h4 class="code-header">pub fn <a href="#method.binary_search_by" class="fn">binary_search_by</a><'a, F>(&'a self, f: F) -> <a class="enum" href="https://doc.rust-lang.org/1.90.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.usize.html">usize</a>, <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.usize.html">usize</a>><div class="where">where |
| F: <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.reference.html">&'a T</a>) -> <a class="enum" href="https://doc.rust-lang.org/1.90.0/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/1.90.0/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/1.90.0/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/1.90.0/std/primitive.slice.html#method.binary_search" title="method slice::binary_search"><code>binary_search</code></a>, <a href="https://doc.rust-lang.org/1.90.0/std/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/1.90.0/std/primitive.slice.html#method.partition_point" title="method slice::partition_point"><code>partition_point</code></a>.</p> |
| <h5 id="examples-42"><a class="doc-anchor" href="#examples-42">§</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">&</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">&</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">&</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">&</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>) => <span class="bool-val">true</span>, <span class="kw">_ </span>=> <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/1.90.0/src/core/slice/mod.rs.html#3033-3036">Source</a></span><h4 class="code-header">pub fn <a href="#method.binary_search_by_key" class="fn">binary_search_by_key</a><'a, B, F>( |
| &'a self, |
| b: <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.reference.html">&B</a>, |
| f: F, |
| ) -> <a class="enum" href="https://doc.rust-lang.org/1.90.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.usize.html">usize</a>, <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.usize.html">usize</a>><div class="where">where |
| F: <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.reference.html">&'a T</a>) -> B, |
| B: <a class="trait" href="https://doc.rust-lang.org/1.90.0/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="https://doc.rust-lang.org/1.90.0/std/primitive.slice.html#method.sort_by_key" title="method 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/1.90.0/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/1.90.0/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/1.90.0/std/primitive.slice.html#method.binary_search" title="method slice::binary_search"><code>binary_search</code></a>, <a href="https://doc.rust-lang.org/1.90.0/std/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/1.90.0/std/primitive.slice.html#method.partition_point" title="method slice::partition_point"><code>partition_point</code></a>.</p> |
| <h5 id="examples-43"><a class="doc-anchor" href="#examples-43">§</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">&</span><span class="number">13</span>, |<span class="kw-2">&</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">&</span><span class="number">4</span>, |<span class="kw-2">&</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">&</span><span class="number">100</span>, |<span class="kw-2">&</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">&</span><span class="number">1</span>, |<span class="kw-2">&</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>) => <span class="bool-val">true</span>, <span class="kw">_ </span>=> <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/1.90.0/src/core/slice/mod.rs.html#4055">Source</a></span><h4 class="code-header">pub unsafe fn <a href="#method.align_to" class="fn">align_to</a><U>(&self) -> (&<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.slice.html">[T]</a>, &<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.slice.html">[U]</a>, &<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/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-3"><a class="doc-anchor" href="#safety-3">§</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::<T, U></code> also apply here.</p> |
| <h5 id="examples-44"><a class="doc-anchor" href="#examples-44">§</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::<u16>(); |
| <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/1.90.0/src/core/slice/mod.rs.html#4211-4215">Source</a><h4 class="code-header">pub fn <a href="#method.as_simd" class="fn">as_simd</a><const LANES: <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.usize.html">usize</a>>(&self) -> (&<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.slice.html">[T]</a>, &[<a class="struct" href="https://doc.rust-lang.org/1.90.0/core/core_simd/vector/struct.Simd.html" title="struct core::core_simd::vector::Simd">Simd</a><T, LANES>], &<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.slice.html">[T]</a>)<div class="where">where |
| <a class="struct" href="https://doc.rust-lang.org/1.90.0/core/core_simd/vector/struct.Simd.html" title="struct core::core_simd::vector::Simd">Simd</a><T, LANES>: <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/convert/trait.AsRef.html" title="trait core::convert::AsRef">AsRef</a><<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.array.html">[T; LANES]</a>>, |
| T: <a class="trait" href="https://doc.rust-lang.org/1.90.0/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/1.90.0/core/core_simd/lane_count/struct.LaneCount.html" title="struct core::core_simd::lane_count::LaneCount">LaneCount</a><LANES>: <a class="trait" href="https://doc.rust-lang.org/1.90.0/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/1.90.0/std/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-9"><a class="doc-anchor" href="#panics-9">§</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<T, LANES></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-45"><a class="doc-anchor" href="#examples-45">§</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">&</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::<<span class="number">4</span>>(); |
| <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::<Vec<<span class="kw">_</span>>>(), <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">&</span>[f32]) -> 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<f32> = (<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">&</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/1.90.0/src/core/slice/mod.rs.html#4286-4288">Source</a></span><h4 class="code-header">pub fn <a href="#method.is_sorted" class="fn">is_sorted</a>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.bool.html">bool</a><div class="where">where |
| T: <a class="trait" href="https://doc.rust-lang.org/1.90.0/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 <= 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-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>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/1.90.0/src/core/slice/mod.rs.html#4329-4331">Source</a></span><h4 class="code-header">pub fn <a href="#method.is_sorted_by" class="fn">is_sorted_by</a><'a, F>(&'a self, compare: F) -> <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.bool.html">bool</a><div class="where">where |
| F: <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.reference.html">&'a T</a>, <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.reference.html">&'a T</a>) -> <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/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-47"><a class="doc-anchor" href="#examples-47">§</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 <= 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 < 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/1.90.0/src/core/slice/mod.rs.html#4353-4356">Source</a></span><h4 class="code-header">pub fn <a href="#method.is_sorted_by_key" class="fn">is_sorted_by_key</a><'a, F, K>(&'a self, f: F) -> <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.bool.html">bool</a><div class="where">where |
| F: <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.reference.html">&'a T</a>) -> K, |
| K: <a class="trait" href="https://doc.rust-lang.org/1.90.0/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/1.90.0/std/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-48"><a class="doc-anchor" href="#examples-48">§</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/1.90.0/src/core/slice/mod.rs.html#4412-4414">Source</a></span><h4 class="code-header">pub fn <a href="#method.partition_point" class="fn">partition_point</a><P>(&self, pred: P) -> <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.usize.html">usize</a><div class="where">where |
| P: <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.reference.html">&T</a>) -> <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/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/1.90.0/std/primitive.slice.html#method.binary_search" title="method slice::binary_search"><code>binary_search</code></a>, <a href="https://doc.rust-lang.org/1.90.0/std/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/1.90.0/std/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-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="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">&</span>x| x < <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">&</span>x| x < <span class="number">5</span>)); |
| <span class="macro">assert!</span>(v[i..].iter().all(|<span class="kw-2">&</span>x| !(x < <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 < <span class="kw-2">&</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 < <span class="kw-2">&</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">&</span>x| x <= 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.element_offset" class="method"><a class="src rightside" href="https://doc.rust-lang.org/1.90.0/src/core/slice/mod.rs.html#4822">Source</a><h4 class="code-header">pub fn <a href="#method.element_offset" class="fn">element_offset</a>(&self, element: <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.reference.html">&T</a>) -> <a class="enum" href="https://doc.rust-lang.org/1.90.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.usize.html">usize</a>></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 to the start of an element within the slice.</p> |
| <p>This method is useful for extending slice iterators like <a href="https://doc.rust-lang.org/1.90.0/std/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/1.90.0/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-10"><a class="doc-anchor" href="#panics-10">§</a>Panics</h5> |
| <p>Panics if <code>T</code> is zero-sized.</p> |
| <h5 id="examples-50"><a class="doc-anchor" href="#examples-50">§</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">&</span>[u32] = <span class="kw-2">&</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">&</span>nums[<span class="number">2</span>]; |
| |
| <span class="macro">assert_eq!</span>(num, <span class="kw-2">&</span><span class="number">1</span>); |
| <span class="macro">assert_eq!</span>(nums.element_offset(num), <span class="prelude-val">Some</span>(<span class="number">2</span>));</code></pre></div> |
| <p>Returning <code>None</code> with an unaligned 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">&</span>[[u32; <span class="number">2</span>]] = <span class="kw-2">&</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">&</span>[u32] = arr.as_flattened(); |
| |
| <span class="kw">let </span>ok_elm: <span class="kw-2">&</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">&</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">&</span>[<span class="number">0</span>, <span class="number">1</span>]); |
| <span class="macro">assert_eq!</span>(weird_elm, <span class="kw-2">&</span>[<span class="number">1</span>, <span class="number">2</span>]); |
| |
| <span class="macro">assert_eq!</span>(arr.element_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.element_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/1.90.0/src/core/slice/mod.rs.html#4876">Source</a><h4 class="code-header">pub fn <a href="#method.subslice_range" class="fn">subslice_range</a>(&self, subslice: &<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.slice.html">[T]</a>) -> <a class="enum" href="https://doc.rust-lang.org/1.90.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><<a class="struct" href="https://doc.rust-lang.org/1.90.0/core/ops/range/struct.Range.html" title="struct core::ops::range::Range">Range</a><<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.usize.html">usize</a>>></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 is not aligned with the |
| elements in the slice.</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/1.90.0/std/primitive.slice.html#method.windows" title="method slice::windows"><code>.windows()</code></a><a href="https://doc.rust-lang.org/1.90.0/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/1.90.0/std/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-11"><a class="doc-anchor" href="#panics-11">§</a>Panics</h5> |
| <p>Panics if <code>T</code> is zero-sized.</p> |
| <h5 id="examples-51"><a class="doc-anchor" href="#examples-51">§</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">&</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.to_vec" 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/1.90.0/src/alloc/slice.rs.html#370-372">Source</a></span><h4 class="code-header">pub fn <a href="#method.to_vec" class="fn">to_vec</a>(&self) -> <a class="struct" href="https://doc.rust-lang.org/1.90.0/alloc/vec/struct.Vec.html" title="struct alloc::vec::Vec">Vec</a><T><div class="where">where |
| T: <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a>,</div></h4></section></summary><div class="docblock"><p>Copies <code>self</code> into a new <code>Vec</code>.</p> |
| <h5 id="examples-52"><a class="doc-anchor" href="#examples-52">§</a>Examples</h5> |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>s = [<span class="number">10</span>, <span class="number">40</span>, <span class="number">30</span>]; |
| <span class="kw">let </span>x = s.to_vec(); |
| <span class="comment">// Here, `s` and `x` can be modified independently.</span></code></pre></div> |
| </div></details><details class="toggle method-toggle" open><summary><section id="method.to_vec_in" class="method"><a class="src rightside" href="https://doc.rust-lang.org/1.90.0/src/alloc/slice.rs.html#394-396">Source</a><h4 class="code-header">pub fn <a href="#method.to_vec_in" class="fn">to_vec_in</a><A>(&self, alloc: A) -> <a class="struct" href="https://doc.rust-lang.org/1.90.0/alloc/vec/struct.Vec.html" title="struct alloc::vec::Vec">Vec</a><T, A><div class="where">where |
| A: <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/alloc/trait.Allocator.html" title="trait core::alloc::Allocator">Allocator</a>, |
| T: <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</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>allocator_api</code>)</span></div></span></summary><div class="docblock"><p>Copies <code>self</code> into a new <code>Vec</code> with an allocator.</p> |
| <h5 id="examples-53"><a class="doc-anchor" href="#examples-53">§</a>Examples</h5> |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="attr">#![feature(allocator_api)] |
| |
| </span><span class="kw">use </span>std::alloc::System; |
| |
| <span class="kw">let </span>s = [<span class="number">10</span>, <span class="number">40</span>, <span class="number">30</span>]; |
| <span class="kw">let </span>x = s.to_vec_in(System); |
| <span class="comment">// Here, `s` and `x` can be modified independently.</span></code></pre></div> |
| </div></details><details class="toggle method-toggle" open><summary><section id="method.repeat" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.40.0">1.40.0</span> · <a class="src" href="https://doc.rust-lang.org/1.90.0/src/alloc/slice.rs.html#505-507">Source</a></span><h4 class="code-header">pub fn <a href="#method.repeat" class="fn">repeat</a>(&self, n: <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.usize.html">usize</a>) -> <a class="struct" href="https://doc.rust-lang.org/1.90.0/alloc/vec/struct.Vec.html" title="struct alloc::vec::Vec">Vec</a><T><div class="where">where |
| T: <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/marker/trait.Copy.html" title="trait core::marker::Copy">Copy</a>,</div></h4></section></summary><div class="docblock"><p>Creates a vector by copying a slice <code>n</code> times.</p> |
| <h5 id="panics-12"><a class="doc-anchor" href="#panics-12">§</a>Panics</h5> |
| <p>This function will panic if the capacity would overflow.</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="macro">assert_eq!</span>([<span class="number">1</span>, <span class="number">2</span>].repeat(<span class="number">3</span>), <span class="macro">vec!</span>[<span class="number">1</span>, <span class="number">2</span>, <span class="number">1</span>, <span class="number">2</span>, <span class="number">1</span>, <span class="number">2</span>]);</code></pre></div> |
| <p>A panic upon overflow:</p> |
| |
| <div class="example-wrap should_panic"><a href="#" class="tooltip" title="This example panics">ⓘ</a><pre class="rust rust-example-rendered"><code><span class="comment">// this will panic at runtime |
| </span><span class="string">b"0123456789abcdef"</span>.repeat(usize::MAX);</code></pre></div> |
| </div></details><details class="toggle method-toggle" open><summary><section id="method.concat" 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/1.90.0/src/alloc/slice.rs.html#573-575">Source</a></span><h4 class="code-header">pub fn <a href="#method.concat" class="fn">concat</a><Item>(&self) -> <<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.slice.html">[T]</a> as <a class="trait" href="https://doc.rust-lang.org/1.90.0/alloc/slice/trait.Concat.html" title="trait alloc::slice::Concat">Concat</a><Item>>::<a class="associatedtype" href="https://doc.rust-lang.org/1.90.0/alloc/slice/trait.Concat.html#associatedtype.Output" title="type alloc::slice::Concat::Output">Output</a> <a href="#" class="tooltip" data-notable-ty="<[T] as Concat<Item>>::Output">ⓘ</a><div class="where">where |
| <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.slice.html">[T]</a>: <a class="trait" href="https://doc.rust-lang.org/1.90.0/alloc/slice/trait.Concat.html" title="trait alloc::slice::Concat">Concat</a><Item>, |
| Item: ?<a class="trait" href="https://doc.rust-lang.org/1.90.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</div></h4></section></summary><div class="docblock"><p>Flattens a slice of <code>T</code> into a single value <code>Self::Output</code>.</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="macro">assert_eq!</span>([<span class="string">"hello"</span>, <span class="string">"world"</span>].concat(), <span class="string">"helloworld"</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>]].concat(), [<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>, <span class="number">4</span>]);</code></pre></div> |
| </div></details><details class="toggle method-toggle" open><summary><section id="method.join" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.3.0">1.3.0</span> · <a class="src" href="https://doc.rust-lang.org/1.90.0/src/alloc/slice.rs.html#592-594">Source</a></span><h4 class="code-header">pub fn <a href="#method.join" class="fn">join</a><Separator>( |
| &self, |
| sep: Separator, |
| ) -> <<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.slice.html">[T]</a> as <a class="trait" href="https://doc.rust-lang.org/1.90.0/alloc/slice/trait.Join.html" title="trait alloc::slice::Join">Join</a><Separator>>::<a class="associatedtype" href="https://doc.rust-lang.org/1.90.0/alloc/slice/trait.Join.html#associatedtype.Output" title="type alloc::slice::Join::Output">Output</a> <a href="#" class="tooltip" data-notable-ty="<[T] as Join<Separator>>::Output">ⓘ</a><div class="where">where |
| <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.slice.html">[T]</a>: <a class="trait" href="https://doc.rust-lang.org/1.90.0/alloc/slice/trait.Join.html" title="trait alloc::slice::Join">Join</a><Separator>,</div></h4></section></summary><div class="docblock"><p>Flattens a slice of <code>T</code> into a single value <code>Self::Output</code>, placing a |
| given separator between each.</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_eq!</span>([<span class="string">"hello"</span>, <span class="string">"world"</span>].join(<span class="string">" "</span>), <span class="string">"hello world"</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>]].join(<span class="kw-2">&</span><span class="number">0</span>), [<span class="number">1</span>, <span class="number">2</span>, <span class="number">0</span>, <span class="number">3</span>, <span class="number">4</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>]].join(<span class="kw-2">&</span>[<span class="number">0</span>, <span class="number">0</span>][..]), [<span class="number">1</span>, <span class="number">2</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">3</span>, <span class="number">4</span>]);</code></pre></div> |
| </div></details><details class="toggle method-toggle" open><summary><section id="method.connect" 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/1.90.0/src/alloc/slice.rs.html#612-614">Source</a></span><h4 class="code-header">pub fn <a href="#method.connect" class="fn">connect</a><Separator>( |
| &self, |
| sep: Separator, |
| ) -> <<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.slice.html">[T]</a> as <a class="trait" href="https://doc.rust-lang.org/1.90.0/alloc/slice/trait.Join.html" title="trait alloc::slice::Join">Join</a><Separator>>::<a class="associatedtype" href="https://doc.rust-lang.org/1.90.0/alloc/slice/trait.Join.html#associatedtype.Output" title="type alloc::slice::Join::Output">Output</a> <a href="#" class="tooltip" data-notable-ty="<[T] as Join<Separator>>::Output">ⓘ</a><div class="where">where |
| <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.slice.html">[T]</a>: <a class="trait" href="https://doc.rust-lang.org/1.90.0/alloc/slice/trait.Join.html" title="trait alloc::slice::Join">Join</a><Separator>,</div></h4></section><span class="item-info"><div class="stab deprecated"><span class="emoji">👎</span><span>Deprecated since 1.3.0: renamed to join</span></div></span></summary><div class="docblock"><p>Flattens a slice of <code>T</code> into a single value <code>Self::Output</code>, placing a |
| given separator between each.</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_eq!</span>([<span class="string">"hello"</span>, <span class="string">"world"</span>].connect(<span class="string">" "</span>), <span class="string">"hello world"</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>]].connect(<span class="kw-2">&</span><span class="number">0</span>), [<span class="number">1</span>, <span class="number">2</span>, <span class="number">0</span>, <span class="number">3</span>, <span class="number">4</span>]);</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-Clone-for-Attrs" class="impl"><a href="#impl-Clone-for-Attrs" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a> for <a class="struct" href="struct.Attrs.html" title="struct hir::Attrs">Attrs</a></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.clone" class="method trait-impl"><a href="#method.clone" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.90.0/core/clone/trait.Clone.html#tymethod.clone" class="fn">clone</a>(&self) -> <a class="struct" href="struct.Attrs.html" title="struct hir::Attrs">Attrs</a></h4></section></summary><div class='docblock'>Returns a duplicate of the value. <a href="https://doc.rust-lang.org/1.90.0/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/1.90.0/src/core/clone.rs.html#213-215">Source</a></span><a href="#method.clone_from" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.90.0/core/clone/trait.Clone.html#method.clone_from" class="fn">clone_from</a>(&mut self, source: &Self)</h4></section></summary><div class='docblock'>Performs copy-assignment from <code>source</code>. <a href="https://doc.rust-lang.org/1.90.0/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-Attrs" class="impl"><a href="#impl-Debug-for-Attrs" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/fmt/trait.Debug.html" title="trait core::fmt::Debug">Debug</a> for <a class="struct" href="struct.Attrs.html" title="struct hir::Attrs">Attrs</a></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.fmt" class="method trait-impl"><a href="#method.fmt" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.90.0/core/fmt/trait.Debug.html#tymethod.fmt" class="fn">fmt</a>(&self, f: &mut <a class="struct" href="https://doc.rust-lang.org/1.90.0/core/fmt/struct.Formatter.html" title="struct core::fmt::Formatter">Formatter</a><'_>) -> <a class="enum" href="https://doc.rust-lang.org/1.90.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.unit.html">()</a>, <a class="struct" href="https://doc.rust-lang.org/1.90.0/core/fmt/struct.Error.html" title="struct core::fmt::Error">Error</a>></h4></section></summary><div class='docblock'>Formats the value using the given formatter. <a href="https://doc.rust-lang.org/1.90.0/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-Attrs" class="impl"><a href="#impl-Default-for-Attrs" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/default/trait.Default.html" title="trait core::default::Default">Default</a> for <a class="struct" href="struct.Attrs.html" title="struct hir::Attrs">Attrs</a></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.default" class="method trait-impl"><a href="#method.default" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.90.0/core/default/trait.Default.html#tymethod.default" class="fn">default</a>() -> <a class="struct" href="struct.Attrs.html" title="struct hir::Attrs">Attrs</a></h4></section></summary><div class='docblock'>Returns the “default value” for a type. <a href="https://doc.rust-lang.org/1.90.0/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-Attrs" class="impl"><a href="#impl-Deref-for-Attrs" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/ops/deref/trait.Deref.html" title="trait core::ops::deref::Deref">Deref</a> for <a class="struct" href="struct.Attrs.html" title="struct hir::Attrs">Attrs</a></h3></section></summary><div class="impl-items"><details class="toggle" open><summary><section id="associatedtype.Target" class="associatedtype trait-impl"><a href="#associatedtype.Target" class="anchor">§</a><h4 class="code-header">type <a href="https://doc.rust-lang.org/1.90.0/core/ops/deref/trait.Deref.html#associatedtype.Target" class="associatedtype">Target</a> = [<a class="struct" href="struct.Attr.html" title="struct hir::Attr">Attr</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 href="#method.deref" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.90.0/core/ops/deref/trait.Deref.html#tymethod.deref" class="fn">deref</a>(&self) -> &[<a class="struct" href="struct.Attr.html" title="struct hir::Attr">Attr</a>]</h4></section></summary><div class='docblock'>Dereferences the value.</div></details></div></details><details class="toggle implementors-toggle" open><summary><section id="impl-PartialEq-for-Attrs" class="impl"><a href="#impl-PartialEq-for-Attrs" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/cmp/trait.PartialEq.html" title="trait core::cmp::PartialEq">PartialEq</a> for <a class="struct" href="struct.Attrs.html" title="struct hir::Attrs">Attrs</a></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.eq" class="method trait-impl"><a href="#method.eq" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.90.0/core/cmp/trait.PartialEq.html#tymethod.eq" class="fn">eq</a>(&self, other: &<a class="struct" href="struct.Attrs.html" title="struct hir::Attrs">Attrs</a>) -> <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/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/1.90.0/src/core/cmp.rs.html#265">Source</a></span><a href="#method.ne" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.90.0/core/cmp/trait.PartialEq.html#method.ne" class="fn">ne</a>(&self, other: <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.reference.html">&Rhs</a>) -> <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/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><section id="impl-Eq-for-Attrs" class="impl"><a href="#impl-Eq-for-Attrs" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/cmp/trait.Eq.html" title="trait core::cmp::Eq">Eq</a> for <a class="struct" href="struct.Attrs.html" title="struct hir::Attrs">Attrs</a></h3></section><section id="impl-StructuralPartialEq-for-Attrs" class="impl"><a href="#impl-StructuralPartialEq-for-Attrs" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/marker/trait.StructuralPartialEq.html" title="trait core::marker::StructuralPartialEq">StructuralPartialEq</a> for <a class="struct" href="struct.Attrs.html" title="struct hir::Attrs">Attrs</a></h3></section></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-Attrs" class="impl"><a href="#impl-Freeze-for-Attrs" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/marker/trait.Freeze.html" title="trait core::marker::Freeze">Freeze</a> for <a class="struct" href="struct.Attrs.html" title="struct hir::Attrs">Attrs</a></h3></section><section id="impl-RefUnwindSafe-for-Attrs" class="impl"><a href="#impl-RefUnwindSafe-for-Attrs" class="anchor">§</a><h3 class="code-header">impl !<a class="trait" href="https://doc.rust-lang.org/1.90.0/core/panic/unwind_safe/trait.RefUnwindSafe.html" title="trait core::panic::unwind_safe::RefUnwindSafe">RefUnwindSafe</a> for <a class="struct" href="struct.Attrs.html" title="struct hir::Attrs">Attrs</a></h3></section><section id="impl-Send-for-Attrs" class="impl"><a href="#impl-Send-for-Attrs" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> for <a class="struct" href="struct.Attrs.html" title="struct hir::Attrs">Attrs</a></h3></section><section id="impl-Sync-for-Attrs" class="impl"><a href="#impl-Sync-for-Attrs" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a> for <a class="struct" href="struct.Attrs.html" title="struct hir::Attrs">Attrs</a></h3></section><section id="impl-Unpin-for-Attrs" class="impl"><a href="#impl-Unpin-for-Attrs" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a> for <a class="struct" href="struct.Attrs.html" title="struct hir::Attrs">Attrs</a></h3></section><section id="impl-UnwindSafe-for-Attrs" class="impl"><a href="#impl-UnwindSafe-for-Attrs" class="anchor">§</a><h3 class="code-header">impl !<a class="trait" href="https://doc.rust-lang.org/1.90.0/core/panic/unwind_safe/trait.UnwindSafe.html" title="trait core::panic::unwind_safe::UnwindSafe">UnwindSafe</a> for <a class="struct" href="struct.Attrs.html" title="struct hir::Attrs">Attrs</a></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/1.90.0/src/core/any.rs.html#138">Source</a><a href="#impl-Any-for-T" class="anchor">§</a><h3 class="code-header">impl<T> <a class="trait" href="https://doc.rust-lang.org/1.90.0/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/1.90.0/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/1.90.0/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/1.90.0/core/any/trait.Any.html#tymethod.type_id" class="fn">type_id</a>(&self) -> <a class="struct" href="https://doc.rust-lang.org/1.90.0/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/1.90.0/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/1.90.0/src/core/borrow.rs.html#209">Source</a><a href="#impl-Borrow%3CT%3E-for-T" class="anchor">§</a><h3 class="code-header">impl<T> <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/borrow/trait.Borrow.html" title="trait core::borrow::Borrow">Borrow</a><T> for T<div class="where">where |
| T: ?<a class="trait" href="https://doc.rust-lang.org/1.90.0/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/1.90.0/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/1.90.0/core/borrow/trait.Borrow.html#tymethod.borrow" class="fn">borrow</a>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.reference.html">&T</a></h4></section></summary><div class='docblock'>Immutably borrows from an owned value. <a href="https://doc.rust-lang.org/1.90.0/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/1.90.0/src/core/borrow.rs.html#217">Source</a><a href="#impl-BorrowMut%3CT%3E-for-T" class="anchor">§</a><h3 class="code-header">impl<T> <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/borrow/trait.BorrowMut.html" title="trait core::borrow::BorrowMut">BorrowMut</a><T> for T<div class="where">where |
| T: ?<a class="trait" href="https://doc.rust-lang.org/1.90.0/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/1.90.0/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/1.90.0/core/borrow/trait.BorrowMut.html#tymethod.borrow_mut" class="fn">borrow_mut</a>(&mut self) -> <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.reference.html">&mut T</a></h4></section></summary><div class='docblock'>Mutably borrows from an owned value. <a href="https://doc.rust-lang.org/1.90.0/core/borrow/trait.BorrowMut.html#tymethod.borrow_mut">Read more</a></div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-Cast-for-T" class="impl"><a href="#impl-Cast-for-T" class="anchor">§</a><h3 class="code-header">impl<T> Cast for T</h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.cast" class="method trait-impl"><a href="#method.cast" class="anchor">§</a><h4 class="code-header">fn <a class="fn">cast</a><U>(self, interner: <U as HasInterner>::Interner) -> U<div class="where">where |
| Self: CastTo<U>, |
| U: HasInterner,</div></h4></section></summary><div class='docblock'>Cast a value to type <code>U</code> using <code>CastTo</code>.</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/1.90.0/src/core/clone.rs.html#483">Source</a><a href="#impl-CloneToUninit-for-T" class="anchor">§</a><h3 class="code-header">impl<T> <a class="trait" href="https://doc.rust-lang.org/1.90.0/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/1.90.0/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/1.90.0/src/core/clone.rs.html#485">Source</a><a href="#method.clone_to_uninit" class="anchor">§</a><h4 class="code-header">unsafe fn <a href="https://doc.rust-lang.org/1.90.0/core/clone/trait.CloneToUninit.html#tymethod.clone_to_uninit" class="fn">clone_to_uninit</a>(&self, dest: <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.pointer.html">*mut </a><a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.u8.html">u8</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>dest</code>. <a href="https://doc.rust-lang.org/1.90.0/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-CollectAndApply%3CT,+R%3E-for-T" class="impl"><a href="#impl-CollectAndApply%3CT,+R%3E-for-T" class="anchor">§</a><h3 class="code-header">impl<T, R> CollectAndApply<T, R> for T</h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.collect_and_apply" class="method trait-impl"><a href="#method.collect_and_apply" class="anchor">§</a><h4 class="code-header">fn <a class="fn">collect_and_apply</a><I, F>(iter: I, f: F) -> R<div class="where">where |
| I: <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/iter/traits/iterator/trait.Iterator.html" title="trait core::iter::traits::iterator::Iterator">Iterator</a><Item = T>, |
| F: <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(&<a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.slice.html">[T]</a>) -> R,</div></h4></section></summary><div class="docblock"><p>Equivalent to <code>f(&iter.collect::<Vec<_>>())</code>.</p> |
| </div></details><section id="associatedtype.Output" class="associatedtype trait-impl"><a href="#associatedtype.Output" class="anchor">§</a><h4 class="code-header">type <a class="associatedtype">Output</a> = R</h4></section></div></details><details class="toggle implementors-toggle"><summary><section id="impl-Equivalent%3CK%3E-for-Q" class="impl"><a href="#impl-Equivalent%3CK%3E-for-Q" class="anchor">§</a><h3 class="code-header">impl<Q, K> Equivalent<K> for Q<div class="where">where |
| Q: <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/cmp/trait.Eq.html" title="trait core::cmp::Eq">Eq</a> + ?<a class="trait" href="https://doc.rust-lang.org/1.90.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>, |
| K: <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/borrow/trait.Borrow.html" title="trait core::borrow::Borrow">Borrow</a><Q> + ?<a class="trait" href="https://doc.rust-lang.org/1.90.0/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.equivalent" class="method trait-impl"><a href="#method.equivalent" class="anchor">§</a><h4 class="code-header">fn <a class="fn">equivalent</a>(&self, key: <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.reference.html">&K</a>) -> <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.bool.html">bool</a></h4></section></summary><div class='docblock'>Compare self to <code>key</code> and return <code>true</code> if they are equal.</div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-Equivalent%3CK%3E-for-Q-1" class="impl"><a href="#impl-Equivalent%3CK%3E-for-Q-1" class="anchor">§</a><h3 class="code-header">impl<Q, K> Equivalent<K> for Q<div class="where">where |
| Q: <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/cmp/trait.Eq.html" title="trait core::cmp::Eq">Eq</a> + ?<a class="trait" href="https://doc.rust-lang.org/1.90.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>, |
| K: <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/borrow/trait.Borrow.html" title="trait core::borrow::Borrow">Borrow</a><Q> + ?<a class="trait" href="https://doc.rust-lang.org/1.90.0/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.equivalent-1" class="method trait-impl"><a href="#method.equivalent-1" class="anchor">§</a><h4 class="code-header">fn <a class="fn">equivalent</a>(&self, key: <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.reference.html">&K</a>) -> <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.bool.html">bool</a></h4></section></summary><div class='docblock'>Checks if this value is equivalent to the given key. <a>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/1.90.0/src/core/convert/mod.rs.html#791">Source</a><a href="#impl-From%3CT%3E-for-T" class="anchor">§</a><h3 class="code-header">impl<T> <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/convert/trait.From.html" title="trait core::convert::From">From</a><T> 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/1.90.0/src/core/convert/mod.rs.html#794">Source</a><a href="#method.from" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.90.0/core/convert/trait.From.html#tymethod.from" class="fn">from</a>(t: T) -> 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-Instrument-for-T" class="impl"><a href="#impl-Instrument-for-T" class="anchor">§</a><h3 class="code-header">impl<T> Instrument for T</h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.instrument" class="method trait-impl"><a href="#method.instrument" class="anchor">§</a><h4 class="code-header">fn <a class="fn">instrument</a>(self, span: Span) -> Instrumented<Self></h4></section></summary><div class='docblock'>Instruments this type with the provided [<code>Span</code>], returning an |
| <code>Instrumented</code> wrapper. <a>Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.in_current_span" class="method trait-impl"><a href="#method.in_current_span" class="anchor">§</a><h4 class="code-header">fn <a class="fn">in_current_span</a>(self) -> Instrumented<Self></h4></section></summary><div class='docblock'>Instruments this type with the <a href="super::Span::current()">current</a> <a href="crate::Span"><code>Span</code></a>, returning an |
| <code>Instrumented</code> wrapper. <a>Read more</a></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/1.90.0/src/core/convert/mod.rs.html#773-775">Source</a><a href="#impl-Into%3CU%3E-for-T" class="anchor">§</a><h3 class="code-header">impl<T, U> <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a><U> for T<div class="where">where |
| U: <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/convert/trait.From.html" title="trait core::convert::From">From</a><T>,</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/1.90.0/src/core/convert/mod.rs.html#783">Source</a><a href="#method.into" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.90.0/core/convert/trait.Into.html#tymethod.into" class="fn">into</a>(self) -> 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/1.90.0/core/convert/trait.From.html" title="trait core::convert::From">From</a><T> for U</code> chooses to do.</p> |
| </div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-IntoBox%3Cdyn+Any%3E-for-T" class="impl"><a href="#impl-IntoBox%3Cdyn+Any%3E-for-T" class="anchor">§</a><h3 class="code-header">impl<T> IntoBox<dyn <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/any/trait.Any.html" title="trait core::any::Any">Any</a>> for T<div class="where">where |
| T: <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/any/trait.Any.html" title="trait core::any::Any">Any</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.into_box" class="method trait-impl"><a href="#method.into_box" class="anchor">§</a><h4 class="code-header">fn <a class="fn">into_box</a>(self) -> <a class="struct" href="https://doc.rust-lang.org/1.90.0/alloc/boxed/struct.Box.html" title="struct alloc::boxed::Box">Box</a><dyn <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/any/trait.Any.html" title="trait core::any::Any">Any</a>></h4></section></summary><div class='docblock'>Convert self into the appropriate boxed form.</div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-IntoBox%3Cdyn+Any+%2B+Send%3E-for-T" class="impl"><a href="#impl-IntoBox%3Cdyn+Any+%2B+Send%3E-for-T" class="anchor">§</a><h3 class="code-header">impl<T> IntoBox<dyn <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/any/trait.Any.html" title="trait core::any::Any">Any</a> + <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a>> for T<div class="where">where |
| T: <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/any/trait.Any.html" title="trait core::any::Any">Any</a> + <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.into_box-1" class="method trait-impl"><a href="#method.into_box-1" class="anchor">§</a><h4 class="code-header">fn <a class="fn">into_box</a>(self) -> <a class="struct" href="https://doc.rust-lang.org/1.90.0/alloc/boxed/struct.Box.html" title="struct alloc::boxed::Box">Box</a><dyn <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/any/trait.Any.html" title="trait core::any::Any">Any</a> + <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a>></h4></section></summary><div class='docblock'>Convert self into the appropriate boxed form.</div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-IntoBox%3Cdyn+Any+%2B+Send+%2B+Sync%3E-for-T" class="impl"><a href="#impl-IntoBox%3Cdyn+Any+%2B+Send+%2B+Sync%3E-for-T" class="anchor">§</a><h3 class="code-header">impl<T> IntoBox<dyn <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/any/trait.Any.html" title="trait core::any::Any">Any</a> + <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a> + <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a>> for T<div class="where">where |
| T: <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/any/trait.Any.html" title="trait core::any::Any">Any</a> + <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> + <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.into_box-2" class="method trait-impl"><a href="#method.into_box-2" class="anchor">§</a><h4 class="code-header">fn <a class="fn">into_box</a>(self) -> <a class="struct" href="https://doc.rust-lang.org/1.90.0/alloc/boxed/struct.Box.html" title="struct alloc::boxed::Box">Box</a><dyn <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/any/trait.Any.html" title="trait core::any::Any">Any</a> + <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a> + <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a>></h4></section></summary><div class='docblock'>Convert self into the appropriate boxed form.</div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-IntoEither-for-T" class="impl"><a class="src rightside" href="https://docs.rs/either/1/src/either/into_either.rs.html#64">Source</a><a href="#impl-IntoEither-for-T" class="anchor">§</a><h3 class="code-header">impl<T> <a class="trait" href="https://docs.rs/either/1/either/into_either/trait.IntoEither.html" title="trait either::into_either::IntoEither">IntoEither</a> for T</h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.into_either" class="method trait-impl"><a class="src rightside" href="https://docs.rs/either/1/src/either/into_either.rs.html#29">Source</a><a href="#method.into_either" class="anchor">§</a><h4 class="code-header">fn <a href="https://docs.rs/either/1/either/into_either/trait.IntoEither.html#method.into_either" class="fn">into_either</a>(self, into_left: <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.bool.html">bool</a>) -> <a class="enum" href="https://docs.rs/either/1/either/enum.Either.html" title="enum either::Either">Either</a><Self, Self></h4></section></summary><div class='docblock'>Converts <code>self</code> into a <a href="https://docs.rs/either/1/either/enum.Either.html#variant.Left" title="variant either::Either::Left"><code>Left</code></a> variant of <a href="https://docs.rs/either/1/either/enum.Either.html" title="enum either::Either"><code>Either<Self, Self></code></a> |
| if <code>into_left</code> is <code>true</code>. |
| Converts <code>self</code> into a <a href="https://docs.rs/either/1/either/enum.Either.html#variant.Right" title="variant either::Either::Right"><code>Right</code></a> variant of <a href="https://docs.rs/either/1/either/enum.Either.html" title="enum either::Either"><code>Either<Self, Self></code></a> |
| otherwise. <a href="https://docs.rs/either/1/either/into_either/trait.IntoEither.html#method.into_either">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.into_either_with" class="method trait-impl"><a class="src rightside" href="https://docs.rs/either/1/src/either/into_either.rs.html#55-57">Source</a><a href="#method.into_either_with" class="anchor">§</a><h4 class="code-header">fn <a href="https://docs.rs/either/1/either/into_either/trait.IntoEither.html#method.into_either_with" class="fn">into_either_with</a><F>(self, into_left: F) -> <a class="enum" href="https://docs.rs/either/1/either/enum.Either.html" title="enum either::Either">Either</a><Self, Self><div class="where">where |
| F: <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(&Self) -> <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.bool.html">bool</a>,</div></h4></section></summary><div class='docblock'>Converts <code>self</code> into a <a href="https://docs.rs/either/1/either/enum.Either.html#variant.Left" title="variant either::Either::Left"><code>Left</code></a> variant of <a href="https://docs.rs/either/1/either/enum.Either.html" title="enum either::Either"><code>Either<Self, Self></code></a> |
| if <code>into_left(&self)</code> returns <code>true</code>. |
| Converts <code>self</code> into a <a href="https://docs.rs/either/1/either/enum.Either.html#variant.Right" title="variant either::Either::Right"><code>Right</code></a> variant of <a href="https://docs.rs/either/1/either/enum.Either.html" title="enum either::Either"><code>Either<Self, Self></code></a> |
| otherwise. <a href="https://docs.rs/either/1/either/into_either/trait.IntoEither.html#method.into_either_with">Read more</a></div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-Pointable-for-T" class="impl"><a href="#impl-Pointable-for-T" class="anchor">§</a><h3 class="code-header">impl<T> Pointable for T</h3></section></summary><div class="impl-items"><details class="toggle" open><summary><section id="associatedconstant.ALIGN" class="associatedconstant trait-impl"><a href="#associatedconstant.ALIGN" class="anchor">§</a><h4 class="code-header">const <a class="constant">ALIGN</a>: <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.usize.html">usize</a></h4></section></summary><div class='docblock'>The alignment of pointer.</div></details><details class="toggle" open><summary><section id="associatedtype.Init" class="associatedtype trait-impl"><a href="#associatedtype.Init" class="anchor">§</a><h4 class="code-header">type <a class="associatedtype">Init</a> = T</h4></section></summary><div class='docblock'>The type for initializers.</div></details><details class="toggle method-toggle" open><summary><section id="method.init" class="method trait-impl"><a href="#method.init" class="anchor">§</a><h4 class="code-header">unsafe fn <a class="fn">init</a>(init: <T as Pointable>::Init) -> <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.usize.html">usize</a></h4></section></summary><div class='docblock'>Initializes a with the given initializer. <a>Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.deref-1" class="method trait-impl"><a href="#method.deref-1" class="anchor">§</a><h4 class="code-header">unsafe fn <a class="fn">deref</a><'a>(ptr: <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.usize.html">usize</a>) -> <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.reference.html">&'a T</a></h4></section></summary><div class='docblock'>Dereferences the given pointer. <a>Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.deref_mut" class="method trait-impl"><a href="#method.deref_mut" class="anchor">§</a><h4 class="code-header">unsafe fn <a class="fn">deref_mut</a><'a>(ptr: <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.usize.html">usize</a>) -> <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.reference.html">&'a mut T</a></h4></section></summary><div class='docblock'>Mutably dereferences the given pointer. <a>Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.drop" class="method trait-impl"><a href="#method.drop" class="anchor">§</a><h4 class="code-header">unsafe fn <a class="fn">drop</a>(ptr: <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.usize.html">usize</a>)</h4></section></summary><div class='docblock'>Drops the object pointed to by the given pointer. <a>Read more</a></div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-Receiver-for-P" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.90.0/src/core/ops/deref.rs.html#380-382">Source</a><a href="#impl-Receiver-for-P" class="anchor">§</a><h3 class="code-header">impl<P, T> <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/ops/deref/trait.Receiver.html" title="trait core::ops::deref::Receiver">Receiver</a> for P<div class="where">where |
| P: <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/ops/deref/trait.Deref.html" title="trait core::ops::deref::Deref">Deref</a><Target = T> + ?<a class="trait" href="https://doc.rust-lang.org/1.90.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>, |
| T: ?<a class="trait" href="https://doc.rust-lang.org/1.90.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle" open><summary><section id="associatedtype.Target-1" class="associatedtype trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.90.0/src/core/ops/deref.rs.html#384">Source</a><a href="#associatedtype.Target-1" class="anchor">§</a><h4 class="code-header">type <a href="https://doc.rust-lang.org/1.90.0/core/ops/deref/trait.Receiver.html#associatedtype.Target" class="associatedtype">Target</a> = T</h4></section></summary><span class="item-info"><div class="stab unstable"><span class="emoji">🔬</span><span>This is a nightly-only experimental API. (<code>arbitrary_self_types</code>)</span></div></span><div class='docblock'>The target type on which the method may be called.</div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-ToOwned-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.90.0/src/alloc/borrow.rs.html#82-84">Source</a><a href="#impl-ToOwned-for-T" class="anchor">§</a><h3 class="code-header">impl<T> <a class="trait" href="https://doc.rust-lang.org/1.90.0/alloc/borrow/trait.ToOwned.html" title="trait alloc::borrow::ToOwned">ToOwned</a> for T<div class="where">where |
| T: <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle" open><summary><section id="associatedtype.Owned" class="associatedtype trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.90.0/src/alloc/borrow.rs.html#86">Source</a><a href="#associatedtype.Owned" class="anchor">§</a><h4 class="code-header">type <a href="https://doc.rust-lang.org/1.90.0/alloc/borrow/trait.ToOwned.html#associatedtype.Owned" class="associatedtype">Owned</a> = T</h4></section></summary><div class='docblock'>The resulting type after obtaining ownership.</div></details><details class="toggle method-toggle" open><summary><section id="method.to_owned" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.90.0/src/alloc/borrow.rs.html#87">Source</a><a href="#method.to_owned" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.90.0/alloc/borrow/trait.ToOwned.html#tymethod.to_owned" class="fn">to_owned</a>(&self) -> T</h4></section></summary><div class='docblock'>Creates owned data from borrowed data, usually by cloning. <a href="https://doc.rust-lang.org/1.90.0/alloc/borrow/trait.ToOwned.html#tymethod.to_owned">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.clone_into" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.90.0/src/alloc/borrow.rs.html#91">Source</a><a href="#method.clone_into" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.90.0/alloc/borrow/trait.ToOwned.html#method.clone_into" class="fn">clone_into</a>(&self, target: <a class="primitive" href="https://doc.rust-lang.org/1.90.0/std/primitive.reference.html">&mut T</a>)</h4></section></summary><div class='docblock'>Uses borrowed data to replace owned data, usually by cloning. <a href="https://doc.rust-lang.org/1.90.0/alloc/borrow/trait.ToOwned.html#method.clone_into">Read more</a></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/1.90.0/src/core/convert/mod.rs.html#833-835">Source</a><a href="#impl-TryFrom%3CU%3E-for-T" class="anchor">§</a><h3 class="code-header">impl<T, U> <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><U> for T<div class="where">where |
| U: <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a><T>,</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/1.90.0/src/core/convert/mod.rs.html#837">Source</a><a href="#associatedtype.Error-1" class="anchor">§</a><h4 class="code-header">type <a href="https://doc.rust-lang.org/1.90.0/core/convert/trait.TryFrom.html#associatedtype.Error" class="associatedtype">Error</a> = <a class="enum" href="https://doc.rust-lang.org/1.90.0/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/1.90.0/src/core/convert/mod.rs.html#840">Source</a><a href="#method.try_from" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.90.0/core/convert/trait.TryFrom.html#tymethod.try_from" class="fn">try_from</a>(value: U) -> <a class="enum" href="https://doc.rust-lang.org/1.90.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a><T, <T as <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><U>>::<a class="associatedtype" href="https://doc.rust-lang.org/1.90.0/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a>></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/1.90.0/src/core/convert/mod.rs.html#817-819">Source</a><a href="#impl-TryInto%3CU%3E-for-T" class="anchor">§</a><h3 class="code-header">impl<T, U> <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/convert/trait.TryInto.html" title="trait core::convert::TryInto">TryInto</a><U> for T<div class="where">where |
| U: <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><T>,</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/1.90.0/src/core/convert/mod.rs.html#821">Source</a><a href="#associatedtype.Error" class="anchor">§</a><h4 class="code-header">type <a href="https://doc.rust-lang.org/1.90.0/core/convert/trait.TryInto.html#associatedtype.Error" class="associatedtype">Error</a> = <U as <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><T>>::<a class="associatedtype" href="https://doc.rust-lang.org/1.90.0/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/1.90.0/src/core/convert/mod.rs.html#824">Source</a><a href="#method.try_into" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.90.0/core/convert/trait.TryInto.html#tymethod.try_into" class="fn">try_into</a>(self) -> <a class="enum" href="https://doc.rust-lang.org/1.90.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a><U, <U as <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><T>>::<a class="associatedtype" href="https://doc.rust-lang.org/1.90.0/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a>></h4></section></summary><div class='docblock'>Performs the conversion.</div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-Upcast%3CI,+U%3E-for-T" class="impl"><a href="#impl-Upcast%3CI,+U%3E-for-T" class="anchor">§</a><h3 class="code-header">impl<I, T, U> Upcast<I, U> for T<div class="where">where |
| U: UpcastFrom<I, T>,</div></h3></section></summary><div class="impl-items"><section id="method.upcast" class="method trait-impl"><a href="#method.upcast" class="anchor">§</a><h4 class="code-header">fn <a class="fn">upcast</a>(self, interner: I) -> U</h4></section></div></details><details class="toggle implementors-toggle"><summary><section id="impl-UpcastFrom%3CI,+T%3E-for-T" class="impl"><a href="#impl-UpcastFrom%3CI,+T%3E-for-T" class="anchor">§</a><h3 class="code-header">impl<I, T> UpcastFrom<I, T> for T</h3></section></summary><div class="impl-items"><section id="method.upcast_from" class="method trait-impl"><a href="#method.upcast_from" class="anchor">§</a><h4 class="code-header">fn <a class="fn">upcast_from</a>(from: T, _tcx: I) -> T</h4></section></div></details><details class="toggle implementors-toggle"><summary><section id="impl-WithSubscriber-for-T" class="impl"><a href="#impl-WithSubscriber-for-T" class="anchor">§</a><h3 class="code-header">impl<T> WithSubscriber for T</h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.with_subscriber" class="method trait-impl"><a href="#method.with_subscriber" class="anchor">§</a><h4 class="code-header">fn <a class="fn">with_subscriber</a><S>(self, subscriber: S) -> WithDispatch<Self><div class="where">where |
| S: <a class="trait" href="https://doc.rust-lang.org/1.90.0/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a><Dispatch>,</div></h4></section></summary><div class='docblock'>Attaches the provided <a href="super::Subscriber"><code>Subscriber</code></a> to this type, returning a |
| [<code>WithDispatch</code>] wrapper. <a>Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.with_current_subscriber" class="method trait-impl"><a href="#method.with_current_subscriber" class="anchor">§</a><h4 class="code-header">fn <a class="fn">with_current_subscriber</a>(self) -> WithDispatch<Self></h4></section></summary><div class='docblock'>Attaches the current <a href="crate::dispatcher#setting-the-default-subscriber">default</a> <a href="super::Subscriber"><code>Subscriber</code></a> to this type, returning a |
| [<code>WithDispatch</code>] wrapper. <a>Read more</a></div></details></div></details><section id="impl-Captures%3C'a%3E-for-T" class="impl"><a href="#impl-Captures%3C'a%3E-for-T" class="anchor">§</a><h3 class="code-header">impl<'a, T> Captures<'a> for T<div class="where">where |
| T: ?<a class="trait" href="https://doc.rust-lang.org/1.90.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</div></h3></section></div><script type="text/json" id="notable-traits-data">{"<[T] as Concat<Item>>::Output":"<h3>Notable traits for <code>&[<a class=\"primitive\" href=\"https://doc.rust-lang.org/1.90.0/std/primitive.u8.html\">u8</a>]</code></h3><pre><code><div class=\"where\">impl <a class=\"trait\" href=\"https://doc.rust-lang.org/1.90.0/std/io/trait.Read.html\" title=\"trait std::io::Read\">Read</a> for &[<a class=\"primitive\" href=\"https://doc.rust-lang.org/1.90.0/std/primitive.u8.html\">u8</a>]</div><div class=\"where\">impl <a class=\"trait\" href=\"https://doc.rust-lang.org/1.90.0/std/io/trait.Write.html\" title=\"trait std::io::Write\">Write</a> for &mut [<a class=\"primitive\" href=\"https://doc.rust-lang.org/1.90.0/std/primitive.u8.html\">u8</a>]</div>","<[T] as Join<Separator>>::Output":"<h3>Notable traits for <code>&[<a class=\"primitive\" href=\"https://doc.rust-lang.org/1.90.0/std/primitive.u8.html\">u8</a>]</code></h3><pre><code><div class=\"where\">impl <a class=\"trait\" href=\"https://doc.rust-lang.org/1.90.0/std/io/trait.Read.html\" title=\"trait std::io::Read\">Read</a> for &[<a class=\"primitive\" href=\"https://doc.rust-lang.org/1.90.0/std/primitive.u8.html\">u8</a>]</div><div class=\"where\">impl <a class=\"trait\" href=\"https://doc.rust-lang.org/1.90.0/std/io/trait.Write.html\" title=\"trait std::io::Write\">Write</a> for &mut [<a class=\"primitive\" href=\"https://doc.rust-lang.org/1.90.0/std/primitive.u8.html\">u8</a>]</div>"}</script></section></div></main></body></html> |
