<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="API documentation for the Rust `SliceIndex` trait in crate `std`."><meta name="keywords" content="rust, rustlang, rust-lang, SliceIndex"><title>std::slice::SliceIndex - Rust</title><link rel="stylesheet" type="text/css" href="../../normalize.css"><link rel="stylesheet" type="text/css" href="../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../../dark.css"><link rel="stylesheet" type="text/css" href="../../light.css" id="themeStyle"><script src="../../storage.js"></script><link rel="shortcut icon" href="https://doc.rust-lang.org/favicon.ico"></head><body class="rustdoc trait"><!--[if lte IE 8]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu">☰</div><a href='../../std/index.html'><img src='https://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png' alt='logo' width='100'></a><p class='location'>Trait SliceIndex</p><div class="sidebar-elems"><div class="block items"><a class="sidebar-title" href="#associated-types">Associated Types</a><div class="sidebar-links"><a href="#associatedtype.Output">Output</a></div><a class="sidebar-title" href="#required-methods">Required Methods</a><div class="sidebar-links"><a href="#tymethod.get">get</a><a href="#tymethod.get_mut">get_mut</a><a href="#tymethod.get_unchecked">get_unchecked</a><a href="#tymethod.get_unchecked_mut">get_unchecked_mut</a><a href="#tymethod.index">index</a><a href="#tymethod.index_mut">index_mut</a></div><a class="sidebar-title" href="#implementors">Implementors</a></div><p class='location'><a href='../index.html'>std</a>::<wbr><a href='index.html'>slice</a></p><script>window.sidebarCurrent = {name: 'SliceIndex', ty: 'trait', relpath: ''};</script><script defer src="sidebar-items.js"></script></div></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!"><img src="../../brush.svg" width="18" alt="Pick another theme!"></button><div id="theme-choices"></div></div><script src="../../theme.js"></script><nav class="sub"><form class="search-form js-only"><div class="search-container"><input class="search-input" name="search" autocomplete="off" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><a id="settings-menu" href="../../settings.html"><img src="../../wheel.svg" width="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><h1 class='fqn'><span class='in-band'>Trait <a href='../index.html'>std</a>::<wbr><a href='index.html'>slice</a>::<wbr><a class="trait" href=''>SliceIndex</a></span><span class='out-of-band'><span class='since' title='Stable since Rust version 1.28.0'>1.28.0</span><span id='render-detail'><a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class='inner'>−</span>]</a></span><a class='srclink' href='../../src/core/slice/mod.rs.html#2004-2038' title='goto source code'>[src]</a></span></h1><div class="docblock type-decl"><pre class='rust trait'>pub trait SliceIndex<T>: Sealed <span class="where fmt-newline">where<br> T: ?<a class="trait" href="../../std/marker/trait.Sized.html" title="trait std::marker::Sized">Sized</a>, </span>{
type <a href='#associatedtype.Output' class="type">Output</a>: ?<a class="trait" href="../../std/marker/trait.Sized.html" title="trait std::marker::Sized">Sized</a>;
fn <a href='#tymethod.get' class='fnname'>get</a>(self, slice: <a class="primitive" href="../primitive.reference.html">&</a>T) -> <a class="enum" href="../../std/option/enum.Option.html" title="enum std::option::Option">Option</a><&Self::<a class="type" href="../../std/slice/trait.SliceIndex.html#associatedtype.Output" title="type std::slice::SliceIndex::Output">Output</a>>;
<div class='item-spacer'></div> fn <a href='#tymethod.get_mut' class='fnname'>get_mut</a>(self, slice: <a class="primitive" href="../primitive.reference.html">&mut </a>T) -> <a class="enum" href="../../std/option/enum.Option.html" title="enum std::option::Option">Option</a><&mut Self::<a class="type" href="../../std/slice/trait.SliceIndex.html#associatedtype.Output" title="type std::slice::SliceIndex::Output">Output</a>>;
<div class='item-spacer'></div> unsafe fn <a href='#tymethod.get_unchecked' class='fnname'>get_unchecked</a>(self, slice: <a class="primitive" href="../primitive.reference.html">&</a>T) -> &Self::<a class="type" href="../../std/slice/trait.SliceIndex.html#associatedtype.Output" title="type std::slice::SliceIndex::Output">Output</a>;
<div class='item-spacer'></div> unsafe fn <a href='#tymethod.get_unchecked_mut' class='fnname'>get_unchecked_mut</a>(self, slice: <a class="primitive" href="../primitive.reference.html">&mut </a>T) -> &mut Self::<a class="type" href="../../std/slice/trait.SliceIndex.html#associatedtype.Output" title="type std::slice::SliceIndex::Output">Output</a>;
<div class='item-spacer'></div> fn <a href='#tymethod.index' class='fnname'>index</a>(self, slice: <a class="primitive" href="../primitive.reference.html">&</a>T) -> &Self::<a class="type" href="../../std/slice/trait.SliceIndex.html#associatedtype.Output" title="type std::slice::SliceIndex::Output">Output</a>;
<div class='item-spacer'></div> fn <a href='#tymethod.index_mut' class='fnname'>index_mut</a>(self, slice: <a class="primitive" href="../primitive.reference.html">&mut </a>T) -> &mut Self::<a class="type" href="../../std/slice/trait.SliceIndex.html#associatedtype.Output" title="type std::slice::SliceIndex::Output">Output</a>;
}</pre></div><div class='docblock'><p>A helper trait used for indexing operations.</p>
</div>
<h2 id='associated-types' class='small-section-header'>
Associated Types<a href='#associated-types' class='anchor'></a>
</h2>
<div class='methods'>
<h3 id='associatedtype.Output' class='method'><span id='Output.t' class='invisible'><code>type <a href='#associatedtype.Output' class="type">Output</a>: ?<a class="trait" href="../../std/marker/trait.Sized.html" title="trait std::marker::Sized">Sized</a></code></span></h3><div class='docblock'><p>The output type returned by methods.</p>
</div></div>
<h2 id='required-methods' class='small-section-header'>
Required Methods<a href='#required-methods' class='anchor'></a>
</h2>
<div class='methods'>
<h3 id='tymethod.get' class='method'><span id='get.v' class='invisible'><code>fn <a href='#tymethod.get' class='fnname'>get</a>(self, slice: <a class="primitive" href="../primitive.reference.html">&</a>T) -> <a class="enum" href="../../std/option/enum.Option.html" title="enum std::option::Option">Option</a><&Self::<a class="type" href="../../std/slice/trait.SliceIndex.html#associatedtype.Output" title="type std::slice::SliceIndex::Output">Output</a>></code></span></h3><div class='stability'><div class='stab unstable'><span class=microscope>🔬</span> This is a nightly-only experimental API. (<code>slice_index_methods</code>)</div></div><div class='docblock'><p>Returns a shared reference to the output at this location, if in
bounds.</p>
</div><h3 id='tymethod.get_mut' class='method'><span id='get_mut.v' class='invisible'><code>fn <a href='#tymethod.get_mut' class='fnname'>get_mut</a>(self, slice: <a class="primitive" href="../primitive.reference.html">&mut </a>T) -> <a class="enum" href="../../std/option/enum.Option.html" title="enum std::option::Option">Option</a><&mut Self::<a class="type" href="../../std/slice/trait.SliceIndex.html#associatedtype.Output" title="type std::slice::SliceIndex::Output">Output</a>></code></span></h3><div class='stability'><div class='stab unstable'><span class=microscope>🔬</span> This is a nightly-only experimental API. (<code>slice_index_methods</code>)</div></div><div class='docblock'><p>Returns a mutable reference to the output at this location, if in
bounds.</p>
</div><h3 id='tymethod.get_unchecked' class='method'><span id='get_unchecked.v' class='invisible'><code>unsafe fn <a href='#tymethod.get_unchecked' class='fnname'>get_unchecked</a>(self, slice: <a class="primitive" href="../primitive.reference.html">&</a>T) -> &Self::<a class="type" href="../../std/slice/trait.SliceIndex.html#associatedtype.Output" title="type std::slice::SliceIndex::Output">Output</a></code></span></h3><div class='stability'><div class='stab unstable'><span class=microscope>🔬</span> This is a nightly-only experimental API. (<code>slice_index_methods</code>)</div></div><div class='docblock'><p>Returns a shared reference to the output at this location, without
performing any bounds checking.</p>
</div><h3 id='tymethod.get_unchecked_mut' class='method'><span id='get_unchecked_mut.v' class='invisible'><code>unsafe fn <a href='#tymethod.get_unchecked_mut' class='fnname'>get_unchecked_mut</a>(self, slice: <a class="primitive" href="../primitive.reference.html">&mut </a>T) -> &mut Self::<a class="type" href="../../std/slice/trait.SliceIndex.html#associatedtype.Output" title="type std::slice::SliceIndex::Output">Output</a></code></span></h3><div class='stability'><div class='stab unstable'><span class=microscope>🔬</span> This is a nightly-only experimental API. (<code>slice_index_methods</code>)</div></div><div class='docblock'><p>Returns a mutable reference to the output at this location, without
performing any bounds checking.</p>
</div><h3 id='tymethod.index' class='method'><span id='index.v' class='invisible'><code>fn <a href='#tymethod.index' class='fnname'>index</a>(self, slice: <a class="primitive" href="../primitive.reference.html">&</a>T) -> &Self::<a class="type" href="../../std/slice/trait.SliceIndex.html#associatedtype.Output" title="type std::slice::SliceIndex::Output">Output</a></code></span></h3><div class='stability'><div class='stab unstable'><span class=microscope>🔬</span> This is a nightly-only experimental API. (<code>slice_index_methods</code>)</div></div><div class='docblock'><p>Returns a shared reference to the output at this location, panicking
if out of bounds.</p>
</div><h3 id='tymethod.index_mut' class='method'><span id='index_mut.v' class='invisible'><code>fn <a href='#tymethod.index_mut' class='fnname'>index_mut</a>(self, slice: <a class="primitive" href="../primitive.reference.html">&mut </a>T) -> &mut Self::<a class="type" href="../../std/slice/trait.SliceIndex.html#associatedtype.Output" title="type std::slice::SliceIndex::Output">Output</a></code></span></h3><div class='stability'><div class='stab unstable'><span class=microscope>🔬</span> This is a nightly-only experimental API. (<code>slice_index_methods</code>)</div></div><div class='docblock'><p>Returns a mutable reference to the output at this location, panicking
if out of bounds.</p>
</div></div>
<h2 id='implementors' class='small-section-header'>
Implementors<a href='#implementors' class='anchor'></a>
</h2>
<ul class='item-list' id='implementors-list'>
<li><table class='table-display'><tbody><tr><td><code>impl<T> SliceIndex<<a class="primitive" href="../primitive.slice.html">[</a>T<a class="primitive" href="../primitive.slice.html">]</a>> for <a class="primitive" href="../primitive.usize.html">usize</a><span class="where fmt-newline"> type <a href='#associatedtype.Output' class="type">Output</a> = T;</span></code><td><div class='out-of-band'><a class='srclink' href='../../src/core/slice/mod.rs.html#2041-2087' title='goto source code'>[src]</a></div></td></tr></tbody></table></li>
<li><table class='table-display'><tbody><tr><td><code>impl SliceIndex<<a class="primitive" href="../primitive.str.html">str</a>> for <a class="struct" href="../../std/ops/struct.RangeFull.html" title="struct std::ops::RangeFull">RangeFull</a><span class="where fmt-newline"> type <a href='#associatedtype.Output' class="type">Output</a> = <a class="primitive" href="../primitive.str.html">str</a>;</span></code><td><div class='out-of-band'><a class='srclink' href='../../src/core/str/mod.rs.html#1828-1854' title='goto source code'>[src]</a></div></td></tr></tbody></table></li>
<li><table class='table-display'><tbody><tr><td><code>impl<T> SliceIndex<<a class="primitive" href="../primitive.slice.html">[</a>T<a class="primitive" href="../primitive.slice.html">]</a>> for <a class="struct" href="../../std/ops/struct.Range.html" title="struct std::ops::Range">Range</a><<a class="primitive" href="../primitive.usize.html">usize</a>><span class="where fmt-newline"> type <a href='#associatedtype.Output' class="type">Output</a> = <a class="primitive" href="../primitive.slice.html">[</a>T<a class="primitive" href="../primitive.slice.html">]</a>;</span></code><td><div class='out-of-band'><a class='srclink' href='../../src/core/slice/mod.rs.html#2090-2148' title='goto source code'>[src]</a></div></td></tr></tbody></table></li>
<li><table class='table-display'><tbody><tr><td><code>impl SliceIndex<<a class="primitive" href="../primitive.str.html">str</a>> for <a class="struct" href="../../std/ops/struct.RangeInclusive.html" title="struct std::ops::RangeInclusive">RangeInclusive</a><<a class="primitive" href="../primitive.usize.html">usize</a>><span class="where fmt-newline"> type <a href='#associatedtype.Output' class="type">Output</a> = <a class="primitive" href="../primitive.str.html">str</a>;</span></code><td><div class='out-of-band'><a class='srclink' href='../../src/core/str/mod.rs.html#2003-2033' title='goto source code'>[src]</a></div></td></tr></tbody></table></li>
<li><table class='table-display'><tbody><tr><td><code>impl<T> SliceIndex<<a class="primitive" href="../primitive.slice.html">[</a>T<a class="primitive" href="../primitive.slice.html">]</a>> for <a class="struct" href="../../std/ops/struct.RangeFull.html" title="struct std::ops::RangeFull">RangeFull</a><span class="where fmt-newline"> type <a href='#associatedtype.Output' class="type">Output</a> = <a class="primitive" href="../primitive.slice.html">[</a>T<a class="primitive" href="../primitive.slice.html">]</a>;</span></code><td><div class='out-of-band'><a class='srclink' href='../../src/core/slice/mod.rs.html#2221-2253' title='goto source code'>[src]</a></div></td></tr></tbody></table></li>
<li><table class='table-display'><tbody><tr><td><code>impl<T> SliceIndex<<a class="primitive" href="../primitive.slice.html">[</a>T<a class="primitive" href="../primitive.slice.html">]</a>> for <a class="struct" href="../../std/ops/struct.RangeToInclusive.html" title="struct std::ops::RangeToInclusive">RangeToInclusive</a><<a class="primitive" href="../primitive.usize.html">usize</a>><span class="where fmt-newline"> type <a href='#associatedtype.Output' class="type">Output</a> = <a class="primitive" href="../primitive.slice.html">[</a>T<a class="primitive" href="../primitive.slice.html">]</a>;</span></code><td><div class='out-of-band'><a class='srclink' href='../../src/core/slice/mod.rs.html#2296-2328' title='goto source code'>[src]</a></div></td></tr></tbody></table></li>
<li><table class='table-display'><tbody><tr><td><code>impl<T> SliceIndex<<a class="primitive" href="../primitive.slice.html">[</a>T<a class="primitive" href="../primitive.slice.html">]</a>> for <a class="struct" href="../../std/ops/struct.RangeFrom.html" title="struct std::ops::RangeFrom">RangeFrom</a><<a class="primitive" href="../primitive.usize.html">usize</a>><span class="where fmt-newline"> type <a href='#associatedtype.Output' class="type">Output</a> = <a class="primitive" href="../primitive.slice.html">[</a>T<a class="primitive" href="../primitive.slice.html">]</a>;</span></code><td><div class='out-of-band'><a class='srclink' href='../../src/core/slice/mod.rs.html#2186-2218' title='goto source code'>[src]</a></div></td></tr></tbody></table></li>
<li><table class='table-display'><tbody><tr><td><code>impl SliceIndex<<a class="primitive" href="../primitive.str.html">str</a>> for <a class="struct" href="../../std/ops/struct.RangeTo.html" title="struct std::ops::RangeTo">RangeTo</a><<a class="primitive" href="../primitive.usize.html">usize</a>><span class="where fmt-newline"> type <a href='#associatedtype.Output' class="type">Output</a> = <a class="primitive" href="../primitive.str.html">str</a>;</span></code><td><div class='out-of-band'><a class='srclink' href='../../src/core/str/mod.rs.html#1911-1953' title='goto source code'>[src]</a></div></td></tr></tbody></table></li>
<li><table class='table-display'><tbody><tr><td><code>impl<T> SliceIndex<<a class="primitive" href="../primitive.slice.html">[</a>T<a class="primitive" href="../primitive.slice.html">]</a>> for <a class="struct" href="../../std/ops/struct.RangeTo.html" title="struct std::ops::RangeTo">RangeTo</a><<a class="primitive" href="../primitive.usize.html">usize</a>><span class="where fmt-newline"> type <a href='#associatedtype.Output' class="type">Output</a> = <a class="primitive" href="../primitive.slice.html">[</a>T<a class="primitive" href="../primitive.slice.html">]</a>;</span></code><td><div class='out-of-band'><a class='srclink' href='../../src/core/slice/mod.rs.html#2151-2183' title='goto source code'>[src]</a></div></td></tr></tbody></table></li>
<li><table class='table-display'><tbody><tr><td><code>impl<T> SliceIndex<<a class="primitive" href="../primitive.slice.html">[</a>T<a class="primitive" href="../primitive.slice.html">]</a>> for <a class="struct" href="../../std/ops/struct.RangeInclusive.html" title="struct std::ops::RangeInclusive">RangeInclusive</a><<a class="primitive" href="../primitive.usize.html">usize</a>><span class="where fmt-newline"> type <a href='#associatedtype.Output' class="type">Output</a> = <a class="primitive" href="../primitive.slice.html">[</a>T<a class="primitive" href="../primitive.slice.html">]</a>;</span></code><td><div class='out-of-band'><a class='srclink' href='../../src/core/slice/mod.rs.html#2257-2293' title='goto source code'>[src]</a></div></td></tr></tbody></table></li>
<li><table class='table-display'><tbody><tr><td><code>impl SliceIndex<<a class="primitive" href="../primitive.str.html">str</a>> for <a class="struct" href="../../std/ops/struct.RangeToInclusive.html" title="struct std::ops::RangeToInclusive">RangeToInclusive</a><<a class="primitive" href="../primitive.usize.html">usize</a>><span class="where fmt-newline"> type <a href='#associatedtype.Output' class="type">Output</a> = <a class="primitive" href="../primitive.str.html">str</a>;</span></code><td><div class='out-of-band'><a class='srclink' href='../../src/core/str/mod.rs.html#2038-2068' title='goto source code'>[src]</a></div></td></tr></tbody></table></li>
<li><table class='table-display'><tbody><tr><td><code>impl SliceIndex<<a class="primitive" href="../primitive.str.html">str</a>> for <a class="struct" href="../../std/ops/struct.Range.html" title="struct std::ops::Range">Range</a><<a class="primitive" href="../primitive.usize.html">usize</a>><span class="where fmt-newline"> type <a href='#associatedtype.Output' class="type">Output</a> = <a class="primitive" href="../primitive.str.html">str</a>;</span></code><td><div class='out-of-band'><a class='srclink' href='../../src/core/str/mod.rs.html#1857-1908' title='goto source code'>[src]</a></div></td></tr></tbody></table></li>
<li><table class='table-display'><tbody><tr><td><code>impl SliceIndex<<a class="primitive" href="../primitive.str.html">str</a>> for <a class="struct" href="../../std/ops/struct.RangeFrom.html" title="struct std::ops::RangeFrom">RangeFrom</a><<a class="primitive" href="../primitive.usize.html">usize</a>><span class="where fmt-newline"> type <a href='#associatedtype.Output' class="type">Output</a> = <a class="primitive" href="../primitive.str.html">str</a>;</span></code><td><div class='out-of-band'><a class='srclink' href='../../src/core/str/mod.rs.html#1956-2000' title='goto source code'>[src]</a></div></td></tr></tbody></table></li>
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