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<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="A view into an occupied entry in a `HashMap`. It is part of the `Entry` enum."><meta name="keywords" content="rust, rustlang, rust-lang, OccupiedEntry"><title>OccupiedEntry in hashbrown::hash_map - Rust</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceSerif4-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../FiraSans-Regular.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../FiraSans-Medium.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceCodePro-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceSerif4-Bold.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceCodePro-Semibold.ttf.woff2"><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="../../ayu.css" disabled><link 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class="location"></h2></nav><nav class="sidebar"><a class="sidebar-logo" href="../../hashbrown/index.html"><div class="logo-container"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></div></a><h2 class="location"><a href="#">OccupiedEntry</a></h2><div class="sidebar-elems"><section><div class="block"><h3 class="sidebar-title"><a href="#implementations">Methods</a></h3><ul><li><a href="#method.get">get</a></li><li><a href="#method.get_mut">get_mut</a></li><li><a href="#method.insert">insert</a></li><li><a href="#method.into_mut">into_mut</a></li><li><a href="#method.key">key</a></li><li><a href="#method.remove">remove</a></li><li><a href="#method.remove_entry">remove_entry</a></li><li><a href="#method.replace_entry">replace_entry</a></li><li><a href="#method.replace_entry_with">replace_entry_with</a></li><li><a href="#method.replace_key">replace_key</a></li></ul></div><div class="block"><h3 class="sidebar-title"><a href="#trait-implementations">Trait Implementations</a></h3><ul><li><a href="#impl-Debug-for-OccupiedEntry%3C%27_%2C%20K%2C%20V%2C%20S%2C%20A%3E">Debug</a></li><li><a href="#impl-Send-for-OccupiedEntry%3C%27_%2C%20K%2C%20V%2C%20S%2C%20A%3E">Send</a></li><li><a href="#impl-Sync-for-OccupiedEntry%3C%27_%2C%20K%2C%20V%2C%20S%2C%20A%3E">Sync</a></li></ul></div><div class="block"><h3 class="sidebar-title"><a href="#synthetic-implementations">Auto Trait Implementations</a></h3><ul><li><a href="#impl-RefUnwindSafe-for-OccupiedEntry%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E">RefUnwindSafe</a></li><li><a href="#impl-Unpin-for-OccupiedEntry%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E">Unpin</a></li><li><a href="#impl-UnwindSafe-for-OccupiedEntry%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E">!UnwindSafe</a></li></ul></div><div class="block"><h3 class="sidebar-title"><a href="#blanket-implementations">Blanket Implementations</a></h3><ul><li><a href="#impl-Any-for-OccupiedEntry%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E">Any</a></li><li><a href="#impl-Borrow%3CT%3E-for-OccupiedEntry%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E">Borrow&lt;T&gt;</a></li><li><a href="#impl-BorrowMut%3CT%3E-for-OccupiedEntry%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E">BorrowMut&lt;T&gt;</a></li><li><a href="#impl-From%3CT%3E-for-OccupiedEntry%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E">From&lt;T&gt;</a></li><li><a href="#impl-Into%3CU%3E-for-OccupiedEntry%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E">Into&lt;U&gt;</a></li><li><a href="#impl-TryFrom%3CU%3E-for-OccupiedEntry%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E">TryFrom&lt;U&gt;</a></li><li><a href="#impl-TryInto%3CU%3E-for-OccupiedEntry%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E">TryInto&lt;U&gt;</a></li></ul></div></section><h2 class="location"><a href="index.html">In hashbrown::hash_map</a></h2></div></nav><main><div class="width-limiter"><div class="sub-container"><a class="sub-logo-container" href="../../hashbrown/index.html"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></a><nav class="sub"><form class="search-form"><div class="search-container"><span></span><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><div id="help-button" title="help" tabindex="-1"><button type="button">?</button></div><div id="settings-menu" tabindex="-1"><a href="../../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../../wheel.svg"></a></div></div></form></nav></div><section id="main-content" class="content"><div class="main-heading"><h1 class="fqn"><span class="in-band">Struct <a href="../index.html">hashbrown</a>::<wbr><a href="index.html">hash_map</a>::<wbr><a class="struct" href="#">OccupiedEntry</a><button id="copy-path" onclick="copy_path(this)" title="Copy item path to clipboard"><img src="../../clipboard.svg" width="19" height="18" alt="Copy item path"></button></span></h1><span class="out-of-band"><a class="srclink" href="../../src/hashbrown/map.rs.html#4194-4199">source</a> · <a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class="inner">&#x2212;</span>]</a></span></div><div class="docblock item-decl"><pre class="rust struct"><code>pub struct OccupiedEntry&lt;'a, K, V, S, A:&nbsp;Allocator + <a class="trait" href="https://doc.rust-lang.org/1.64.0/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a>&nbsp;=&nbsp;Global&gt; { /* private fields */ }</code></pre></div><details class="rustdoc-toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>A view into an occupied entry in a <code>HashMap</code>.
It is part of the <a href="enum.Entry.html"><code>Entry</code></a> enum.</p>
<h2 id="examples"><a href="#examples">Examples</a></h2>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use</span> <span class="ident">hashbrown::hash_map</span>::{<span class="ident">Entry</span>, <span class="ident">HashMap</span>, <span class="ident">OccupiedEntry</span>};
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">map</span> <span class="op">=</span> <span class="ident">HashMap::new</span>();
<span class="ident">map</span>.<span class="ident">extend</span>([(<span class="string">&quot;a&quot;</span>, <span class="number">10</span>), (<span class="string">&quot;b&quot;</span>, <span class="number">20</span>), (<span class="string">&quot;c&quot;</span>, <span class="number">30</span>)]);
<span class="kw">let</span> <span class="ident">_entry_o</span>: <span class="ident">OccupiedEntry</span><span class="op">&lt;</span><span class="kw">_</span>, <span class="kw">_</span>, <span class="kw">_</span><span class="op">&gt;</span> <span class="op">=</span> <span class="ident">map</span>.<span class="ident">entry</span>(<span class="string">&quot;a&quot;</span>).<span class="ident">insert</span>(<span class="number">100</span>);
<span class="macro">assert_eq!</span>(<span class="ident">map</span>.<span class="ident">len</span>(), <span class="number">3</span>);
<span class="comment">// Existing key (insert and update)</span>
<span class="kw">match</span> <span class="ident">map</span>.<span class="ident">entry</span>(<span class="string">&quot;a&quot;</span>) {
<span class="ident">Entry::Vacant</span>(<span class="kw">_</span>) =&gt; <span class="macro">unreachable!</span>(),
<span class="ident">Entry::Occupied</span>(<span class="kw-2">mut</span> <span class="ident">view</span>) =&gt; {
<span class="macro">assert_eq!</span>(<span class="ident">view</span>.<span class="ident">get</span>(), <span class="kw-2">&amp;</span><span class="number">100</span>);
<span class="kw">let</span> <span class="ident">v</span> <span class="op">=</span> <span class="ident">view</span>.<span class="ident">get_mut</span>();
<span class="kw-2">*</span><span class="ident">v</span> <span class="kw-2">*</span><span class="op">=</span> <span class="number">10</span>;
<span class="macro">assert_eq!</span>(<span class="ident">view</span>.<span class="ident">insert</span>(<span class="number">1111</span>), <span class="number">1000</span>);
}
}
<span class="macro">assert_eq!</span>(<span class="ident">map</span>[<span class="kw-2">&amp;</span><span class="string">&quot;a&quot;</span>], <span class="number">1111</span>);
<span class="macro">assert_eq!</span>(<span class="ident">map</span>.<span class="ident">len</span>(), <span class="number">3</span>);
<span class="comment">// Existing key (take)</span>
<span class="kw">match</span> <span class="ident">map</span>.<span class="ident">entry</span>(<span class="string">&quot;c&quot;</span>) {
<span class="ident">Entry::Vacant</span>(<span class="kw">_</span>) =&gt; <span class="macro">unreachable!</span>(),
<span class="ident">Entry::Occupied</span>(<span class="ident">view</span>) =&gt; {
<span class="macro">assert_eq!</span>(<span class="ident">view</span>.<span class="ident">remove_entry</span>(), (<span class="string">&quot;c&quot;</span>, <span class="number">30</span>));
}
}
<span class="macro">assert_eq!</span>(<span class="ident">map</span>.<span class="ident">get</span>(<span class="kw-2">&amp;</span><span class="string">&quot;c&quot;</span>), <span class="prelude-val">None</span>);
<span class="macro">assert_eq!</span>(<span class="ident">map</span>.<span class="ident">len</span>(), <span class="number">2</span>);</code></pre></div>
</div></details><h2 id="implementations" class="small-section-header">Implementations<a href="#implementations" class="anchor"></a></h2><div id="implementations-list"><details class="rustdoc-toggle implementors-toggle" open><summary><section id="impl-OccupiedEntry%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="impl has-srclink"><span class="rightside"><a class="srclink" href="../../src/hashbrown/map.rs.html#5151-5506">source</a></span><a href="#impl-OccupiedEntry%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="anchor"></a><h3 class="code-header in-band">impl&lt;'a, K, V, S, A:&nbsp;Allocator + <a class="trait" href="https://doc.rust-lang.org/1.64.0/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a>&gt; <a class="struct" href="struct.OccupiedEntry.html" title="struct hashbrown::hash_map::OccupiedEntry">OccupiedEntry</a>&lt;'a, K, V, S, A&gt;</h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.key" class="method has-srclink"><span class="rightside"><a class="srclink" href="../../src/hashbrown/map.rs.html#5168-5170">source</a></span><h4 class="code-header">pub fn <a href="#method.key" class="fnname">key</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.64.0/std/primitive.reference.html">&amp;</a>K</h4></section></summary><div class="docblock"><p>Gets a reference to the key in the entry.</p>
<h5 id="examples-1"><a href="#examples-1">Examples</a></h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use</span> <span class="ident">hashbrown::hash_map</span>::{<span class="ident">Entry</span>, <span class="ident">HashMap</span>};
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">map</span>: <span class="ident">HashMap</span><span class="op">&lt;</span><span class="kw-2">&amp;</span><span class="ident">str</span>, <span class="ident">u32</span><span class="op">&gt;</span> <span class="op">=</span> <span class="ident">HashMap::new</span>();
<span class="ident">map</span>.<span class="ident">entry</span>(<span class="string">&quot;poneyland&quot;</span>).<span class="ident">or_insert</span>(<span class="number">12</span>);
<span class="kw">match</span> <span class="ident">map</span>.<span class="ident">entry</span>(<span class="string">&quot;poneyland&quot;</span>) {
<span class="ident">Entry::Vacant</span>(<span class="kw">_</span>) =&gt; <span class="macro">panic!</span>(),
<span class="ident">Entry::Occupied</span>(<span class="ident">entry</span>) =&gt; <span class="macro">assert_eq!</span>(<span class="ident">entry</span>.<span class="ident">key</span>(), <span class="kw-2">&amp;</span><span class="string">&quot;poneyland&quot;</span>),
}</code></pre></div>
</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.remove_entry" class="method has-srclink"><span class="rightside"><a class="srclink" href="../../src/hashbrown/map.rs.html#5198-5200">source</a></span><h4 class="code-header">pub fn <a href="#method.remove_entry" class="fnname">remove_entry</a>(self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.64.0/std/primitive.tuple.html">(K, V)</a></h4></section></summary><div class="docblock"><p>Take the ownership of the key and value from the map.
Keeps the allocated memory for reuse.</p>
<h5 id="examples-2"><a href="#examples-2">Examples</a></h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use</span> <span class="ident">hashbrown::HashMap</span>;
<span class="kw">use</span> <span class="ident">hashbrown::hash_map::Entry</span>;
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">map</span>: <span class="ident">HashMap</span><span class="op">&lt;</span><span class="kw-2">&amp;</span><span class="ident">str</span>, <span class="ident">u32</span><span class="op">&gt;</span> <span class="op">=</span> <span class="ident">HashMap::new</span>();
<span class="comment">// The map is empty</span>
<span class="macro">assert!</span>(<span class="ident">map</span>.<span class="ident">is_empty</span>() <span class="op">&amp;&amp;</span> <span class="ident">map</span>.<span class="ident">capacity</span>() <span class="op">==</span> <span class="number">0</span>);
<span class="ident">map</span>.<span class="ident">entry</span>(<span class="string">&quot;poneyland&quot;</span>).<span class="ident">or_insert</span>(<span class="number">12</span>);
<span class="kw">let</span> <span class="ident">capacity_before_remove</span> <span class="op">=</span> <span class="ident">map</span>.<span class="ident">capacity</span>();
<span class="kw">if</span> <span class="kw">let</span> <span class="ident">Entry::Occupied</span>(<span class="ident">o</span>) <span class="op">=</span> <span class="ident">map</span>.<span class="ident">entry</span>(<span class="string">&quot;poneyland&quot;</span>) {
<span class="comment">// We delete the entry from the map.</span>
<span class="macro">assert_eq!</span>(<span class="ident">o</span>.<span class="ident">remove_entry</span>(), (<span class="string">&quot;poneyland&quot;</span>, <span class="number">12</span>));
}
<span class="macro">assert_eq!</span>(<span class="ident">map</span>.<span class="ident">contains_key</span>(<span class="string">&quot;poneyland&quot;</span>), <span class="bool-val">false</span>);
<span class="comment">// Now map hold none elements but capacity is equal to the old one</span>
<span class="macro">assert!</span>(<span class="ident">map</span>.<span class="ident">len</span>() <span class="op">==</span> <span class="number">0</span> <span class="op">&amp;&amp;</span> <span class="ident">map</span>.<span class="ident">capacity</span>() <span class="op">==</span> <span class="ident">capacity_before_remove</span>);</code></pre></div>
</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.get" class="method has-srclink"><span class="rightside"><a class="srclink" href="../../src/hashbrown/map.rs.html#5219-5221">source</a></span><h4 class="code-header">pub fn <a href="#method.get" class="fnname">get</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.64.0/std/primitive.reference.html">&amp;</a>V</h4></section></summary><div class="docblock"><p>Gets a reference to the value in the entry.</p>
<h5 id="examples-3"><a href="#examples-3">Examples</a></h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use</span> <span class="ident">hashbrown::HashMap</span>;
<span class="kw">use</span> <span class="ident">hashbrown::hash_map::Entry</span>;
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">map</span>: <span class="ident">HashMap</span><span class="op">&lt;</span><span class="kw-2">&amp;</span><span class="ident">str</span>, <span class="ident">u32</span><span class="op">&gt;</span> <span class="op">=</span> <span class="ident">HashMap::new</span>();
<span class="ident">map</span>.<span class="ident">entry</span>(<span class="string">&quot;poneyland&quot;</span>).<span class="ident">or_insert</span>(<span class="number">12</span>);
<span class="kw">match</span> <span class="ident">map</span>.<span class="ident">entry</span>(<span class="string">&quot;poneyland&quot;</span>) {
<span class="ident">Entry::Vacant</span>(<span class="kw">_</span>) =&gt; <span class="macro">panic!</span>(),
<span class="ident">Entry::Occupied</span>(<span class="ident">entry</span>) =&gt; <span class="macro">assert_eq!</span>(<span class="ident">entry</span>.<span class="ident">get</span>(), <span class="kw-2">&amp;</span><span class="number">12</span>),
}</code></pre></div>
</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.get_mut" class="method has-srclink"><span class="rightside"><a class="srclink" href="../../src/hashbrown/map.rs.html#5251-5253">source</a></span><h4 class="code-header">pub fn <a href="#method.get_mut" class="fnname">get_mut</a>(&amp;mut self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.64.0/std/primitive.reference.html">&amp;mut </a>V</h4></section></summary><div class="docblock"><p>Gets a mutable reference to the value in the entry.</p>
<p>If you need a reference to the <code>OccupiedEntry</code> which may outlive the
destruction of the <code>Entry</code> value, see <a href="#method.into_mut"><code>into_mut</code></a>.</p>
<h5 id="examples-4"><a href="#examples-4">Examples</a></h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use</span> <span class="ident">hashbrown::HashMap</span>;
<span class="kw">use</span> <span class="ident">hashbrown::hash_map::Entry</span>;
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">map</span>: <span class="ident">HashMap</span><span class="op">&lt;</span><span class="kw-2">&amp;</span><span class="ident">str</span>, <span class="ident">u32</span><span class="op">&gt;</span> <span class="op">=</span> <span class="ident">HashMap::new</span>();
<span class="ident">map</span>.<span class="ident">entry</span>(<span class="string">&quot;poneyland&quot;</span>).<span class="ident">or_insert</span>(<span class="number">12</span>);
<span class="macro">assert_eq!</span>(<span class="ident">map</span>[<span class="string">&quot;poneyland&quot;</span>], <span class="number">12</span>);
<span class="kw">if</span> <span class="kw">let</span> <span class="ident">Entry::Occupied</span>(<span class="kw-2">mut</span> <span class="ident">o</span>) <span class="op">=</span> <span class="ident">map</span>.<span class="ident">entry</span>(<span class="string">&quot;poneyland&quot;</span>) {
<span class="kw-2">*</span><span class="ident">o</span>.<span class="ident">get_mut</span>() <span class="op">+</span><span class="op">=</span> <span class="number">10</span>;
<span class="macro">assert_eq!</span>(<span class="kw-2">*</span><span class="ident">o</span>.<span class="ident">get</span>(), <span class="number">22</span>);
<span class="comment">// We can use the same Entry multiple times.</span>
<span class="kw-2">*</span><span class="ident">o</span>.<span class="ident">get_mut</span>() <span class="op">+</span><span class="op">=</span> <span class="number">2</span>;
}
<span class="macro">assert_eq!</span>(<span class="ident">map</span>[<span class="string">&quot;poneyland&quot;</span>], <span class="number">24</span>);</code></pre></div>
</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.into_mut" class="method has-srclink"><span class="rightside"><a class="srclink" href="../../src/hashbrown/map.rs.html#5282-5284">source</a></span><h4 class="code-header">pub fn <a href="#method.into_mut" class="fnname">into_mut</a>(self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.64.0/std/primitive.reference.html">&amp;'a mut </a>V</h4></section></summary><div class="docblock"><p>Converts the OccupiedEntry into a mutable reference to the value in the entry
with a lifetime bound to the map itself.</p>
<p>If you need multiple references to the <code>OccupiedEntry</code>, see <a href="#method.get_mut"><code>get_mut</code></a>.</p>
<h5 id="examples-5"><a href="#examples-5">Examples</a></h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use</span> <span class="ident">hashbrown::hash_map</span>::{<span class="ident">Entry</span>, <span class="ident">HashMap</span>};
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">map</span>: <span class="ident">HashMap</span><span class="op">&lt;</span><span class="kw-2">&amp;</span><span class="ident">str</span>, <span class="ident">u32</span><span class="op">&gt;</span> <span class="op">=</span> <span class="ident">HashMap::new</span>();
<span class="ident">map</span>.<span class="ident">entry</span>(<span class="string">&quot;poneyland&quot;</span>).<span class="ident">or_insert</span>(<span class="number">12</span>);
<span class="macro">assert_eq!</span>(<span class="ident">map</span>[<span class="string">&quot;poneyland&quot;</span>], <span class="number">12</span>);
<span class="kw">let</span> <span class="ident">value</span>: <span class="kw-2">&amp;mut</span> <span class="ident">u32</span>;
<span class="kw">match</span> <span class="ident">map</span>.<span class="ident">entry</span>(<span class="string">&quot;poneyland&quot;</span>) {
<span class="ident">Entry::Occupied</span>(<span class="ident">entry</span>) =&gt; <span class="ident">value</span> <span class="op">=</span> <span class="ident">entry</span>.<span class="ident">into_mut</span>(),
<span class="ident">Entry::Vacant</span>(<span class="kw">_</span>) =&gt; <span class="macro">panic!</span>(),
}
<span class="kw-2">*</span><span class="ident">value</span> <span class="op">+</span><span class="op">=</span> <span class="number">10</span>;
<span class="macro">assert_eq!</span>(<span class="ident">map</span>[<span class="string">&quot;poneyland&quot;</span>], <span class="number">22</span>);</code></pre></div>
</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.insert" class="method has-srclink"><span class="rightside"><a class="srclink" href="../../src/hashbrown/map.rs.html#5304-5306">source</a></span><h4 class="code-header">pub fn <a href="#method.insert" class="fnname">insert</a>(&amp;mut self, value: V) -&gt; V</h4></section></summary><div class="docblock"><p>Sets the value of the entry, and returns the entry’s old value.</p>
<h5 id="examples-6"><a href="#examples-6">Examples</a></h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use</span> <span class="ident">hashbrown::HashMap</span>;
<span class="kw">use</span> <span class="ident">hashbrown::hash_map::Entry</span>;
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">map</span>: <span class="ident">HashMap</span><span class="op">&lt;</span><span class="kw-2">&amp;</span><span class="ident">str</span>, <span class="ident">u32</span><span class="op">&gt;</span> <span class="op">=</span> <span class="ident">HashMap::new</span>();
<span class="ident">map</span>.<span class="ident">entry</span>(<span class="string">&quot;poneyland&quot;</span>).<span class="ident">or_insert</span>(<span class="number">12</span>);
<span class="kw">if</span> <span class="kw">let</span> <span class="ident">Entry::Occupied</span>(<span class="kw-2">mut</span> <span class="ident">o</span>) <span class="op">=</span> <span class="ident">map</span>.<span class="ident">entry</span>(<span class="string">&quot;poneyland&quot;</span>) {
<span class="macro">assert_eq!</span>(<span class="ident">o</span>.<span class="ident">insert</span>(<span class="number">15</span>), <span class="number">12</span>);
}
<span class="macro">assert_eq!</span>(<span class="ident">map</span>[<span class="string">&quot;poneyland&quot;</span>], <span class="number">15</span>);</code></pre></div>
</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.remove" class="method has-srclink"><span class="rightside"><a class="srclink" href="../../src/hashbrown/map.rs.html#5333-5335">source</a></span><h4 class="code-header">pub fn <a href="#method.remove" class="fnname">remove</a>(self) -&gt; V</h4></section></summary><div class="docblock"><p>Takes the value out of the entry, and returns it.
Keeps the allocated memory for reuse.</p>
<h5 id="examples-7"><a href="#examples-7">Examples</a></h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use</span> <span class="ident">hashbrown::HashMap</span>;
<span class="kw">use</span> <span class="ident">hashbrown::hash_map::Entry</span>;
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">map</span>: <span class="ident">HashMap</span><span class="op">&lt;</span><span class="kw-2">&amp;</span><span class="ident">str</span>, <span class="ident">u32</span><span class="op">&gt;</span> <span class="op">=</span> <span class="ident">HashMap::new</span>();
<span class="comment">// The map is empty</span>
<span class="macro">assert!</span>(<span class="ident">map</span>.<span class="ident">is_empty</span>() <span class="op">&amp;&amp;</span> <span class="ident">map</span>.<span class="ident">capacity</span>() <span class="op">==</span> <span class="number">0</span>);
<span class="ident">map</span>.<span class="ident">entry</span>(<span class="string">&quot;poneyland&quot;</span>).<span class="ident">or_insert</span>(<span class="number">12</span>);
<span class="kw">let</span> <span class="ident">capacity_before_remove</span> <span class="op">=</span> <span class="ident">map</span>.<span class="ident">capacity</span>();
<span class="kw">if</span> <span class="kw">let</span> <span class="ident">Entry::Occupied</span>(<span class="ident">o</span>) <span class="op">=</span> <span class="ident">map</span>.<span class="ident">entry</span>(<span class="string">&quot;poneyland&quot;</span>) {
<span class="macro">assert_eq!</span>(<span class="ident">o</span>.<span class="ident">remove</span>(), <span class="number">12</span>);
}
<span class="macro">assert_eq!</span>(<span class="ident">map</span>.<span class="ident">contains_key</span>(<span class="string">&quot;poneyland&quot;</span>), <span class="bool-val">false</span>);
<span class="comment">// Now map hold none elements but capacity is equal to the old one</span>
<span class="macro">assert!</span>(<span class="ident">map</span>.<span class="ident">len</span>() <span class="op">==</span> <span class="number">0</span> <span class="op">&amp;&amp;</span> <span class="ident">map</span>.<span class="ident">capacity</span>() <span class="op">==</span> <span class="ident">capacity_before_remove</span>);</code></pre></div>
</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.replace_entry" class="method has-srclink"><span class="rightside"><a class="srclink" href="../../src/hashbrown/map.rs.html#5369-5376">source</a></span><h4 class="code-header">pub fn <a href="#method.replace_entry" class="fnname">replace_entry</a>(self, value: V) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.64.0/std/primitive.tuple.html">(K, V)</a></h4></section></summary><div class="docblock"><p>Replaces the entry, returning the old key and value. The new key in the hash map will be
the key used to create this entry.</p>
<h5 id="panics"><a href="#panics">Panics</a></h5>
<p>Will panic if this OccupiedEntry was created through <a href="enum.Entry.html#method.insert" title="Entry::insert"><code>Entry::insert</code></a>.</p>
<h5 id="examples-8"><a href="#examples-8">Examples</a></h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code> <span class="kw">use</span> <span class="ident">hashbrown::hash_map</span>::{<span class="ident">Entry</span>, <span class="ident">HashMap</span>};
<span class="kw">use</span> <span class="ident">std::rc::Rc</span>;
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">map</span>: <span class="ident">HashMap</span><span class="op">&lt;</span><span class="ident">Rc</span><span class="op">&lt;</span><span class="ident">String</span><span class="op">&gt;</span>, <span class="ident">u32</span><span class="op">&gt;</span> <span class="op">=</span> <span class="ident">HashMap::new</span>();
<span class="kw">let</span> <span class="ident">key_one</span> <span class="op">=</span> <span class="ident">Rc::new</span>(<span class="string">&quot;Stringthing&quot;</span>.<span class="ident">to_string</span>());
<span class="kw">let</span> <span class="ident">key_two</span> <span class="op">=</span> <span class="ident">Rc::new</span>(<span class="string">&quot;Stringthing&quot;</span>.<span class="ident">to_string</span>());
<span class="ident">map</span>.<span class="ident">insert</span>(<span class="ident">key_one</span>.<span class="ident">clone</span>(), <span class="number">15</span>);
<span class="macro">assert!</span>(<span class="ident">Rc::strong_count</span>(<span class="kw-2">&amp;</span><span class="ident">key_one</span>) <span class="op">==</span> <span class="number">2</span> <span class="op">&amp;&amp;</span> <span class="ident">Rc::strong_count</span>(<span class="kw-2">&amp;</span><span class="ident">key_two</span>) <span class="op">==</span> <span class="number">1</span>);
<span class="kw">match</span> <span class="ident">map</span>.<span class="ident">entry</span>(<span class="ident">key_two</span>.<span class="ident">clone</span>()) {
<span class="ident">Entry::Occupied</span>(<span class="ident">entry</span>) =&gt; {
<span class="kw">let</span> (<span class="ident">old_key</span>, <span class="ident">old_value</span>): (<span class="ident">Rc</span><span class="op">&lt;</span><span class="ident">String</span><span class="op">&gt;</span>, <span class="ident">u32</span>) <span class="op">=</span> <span class="ident">entry</span>.<span class="ident">replace_entry</span>(<span class="number">16</span>);
<span class="macro">assert!</span>(<span class="ident">Rc::ptr_eq</span>(<span class="kw-2">&amp;</span><span class="ident">key_one</span>, <span class="kw-2">&amp;</span><span class="ident">old_key</span>) <span class="op">&amp;&amp;</span> <span class="ident">old_value</span> <span class="op">==</span> <span class="number">15</span>);
}
<span class="ident">Entry::Vacant</span>(<span class="kw">_</span>) =&gt; <span class="macro">panic!</span>(),
}
<span class="macro">assert!</span>(<span class="ident">Rc::strong_count</span>(<span class="kw-2">&amp;</span><span class="ident">key_one</span>) <span class="op">==</span> <span class="number">1</span> <span class="op">&amp;&amp;</span> <span class="ident">Rc::strong_count</span>(<span class="kw-2">&amp;</span><span class="ident">key_two</span>) <span class="op">==</span> <span class="number">2</span>);
<span class="macro">assert_eq!</span>(<span class="ident">map</span>[<span class="kw-2">&amp;</span><span class="string">&quot;Stringthing&quot;</span>.<span class="ident">to_owned</span>()], <span class="number">16</span>);</code></pre></div>
</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.replace_key" class="method has-srclink"><span class="rightside"><a class="srclink" href="../../src/hashbrown/map.rs.html#5423-5426">source</a></span><h4 class="code-header">pub fn <a href="#method.replace_key" class="fnname">replace_key</a>(self) -&gt; K</h4></section></summary><div class="docblock"><p>Replaces the key in the hash map with the key used to create this entry.</p>
<h5 id="panics-1"><a href="#panics-1">Panics</a></h5>
<p>Will panic if this OccupiedEntry was created through <a href="enum.Entry.html#method.insert" title="Entry::insert"><code>Entry::insert</code></a>.</p>
<h5 id="examples-9"><a href="#examples-9">Examples</a></h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use</span> <span class="ident">hashbrown::hash_map</span>::{<span class="ident">Entry</span>, <span class="ident">HashMap</span>};
<span class="kw">use</span> <span class="ident">std::rc::Rc</span>;
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">map</span>: <span class="ident">HashMap</span><span class="op">&lt;</span><span class="ident">Rc</span><span class="op">&lt;</span><span class="ident">String</span><span class="op">&gt;</span>, <span class="ident">usize</span><span class="op">&gt;</span> <span class="op">=</span> <span class="ident">HashMap::with_capacity</span>(<span class="number">6</span>);
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">keys_one</span>: <span class="ident">Vec</span><span class="op">&lt;</span><span class="ident">Rc</span><span class="op">&lt;</span><span class="ident">String</span><span class="op">&gt;</span><span class="op">&gt;</span> <span class="op">=</span> <span class="ident">Vec::with_capacity</span>(<span class="number">6</span>);
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">keys_two</span>: <span class="ident">Vec</span><span class="op">&lt;</span><span class="ident">Rc</span><span class="op">&lt;</span><span class="ident">String</span><span class="op">&gt;</span><span class="op">&gt;</span> <span class="op">=</span> <span class="ident">Vec::with_capacity</span>(<span class="number">6</span>);
<span class="kw">for</span> (<span class="ident">value</span>, <span class="ident">key</span>) <span class="kw">in</span> [<span class="string">&quot;a&quot;</span>, <span class="string">&quot;b&quot;</span>, <span class="string">&quot;c&quot;</span>, <span class="string">&quot;d&quot;</span>, <span class="string">&quot;e&quot;</span>, <span class="string">&quot;f&quot;</span>].<span class="ident">into_iter</span>().<span class="ident">enumerate</span>() {
<span class="kw">let</span> <span class="ident">rc_key</span> <span class="op">=</span> <span class="ident">Rc::new</span>(<span class="ident">key</span>.<span class="ident">to_owned</span>());
<span class="ident">keys_one</span>.<span class="ident">push</span>(<span class="ident">rc_key</span>.<span class="ident">clone</span>());
<span class="ident">map</span>.<span class="ident">insert</span>(<span class="ident">rc_key</span>.<span class="ident">clone</span>(), <span class="ident">value</span>);
<span class="ident">keys_two</span>.<span class="ident">push</span>(<span class="ident">Rc::new</span>(<span class="ident">key</span>.<span class="ident">to_owned</span>()));
}
<span class="macro">assert!</span>(
<span class="ident">keys_one</span>.<span class="ident">iter</span>().<span class="ident">all</span>(<span class="op">|</span><span class="ident">key</span><span class="op">|</span> <span class="ident">Rc::strong_count</span>(<span class="ident">key</span>) <span class="op">==</span> <span class="number">2</span>)
<span class="op">&amp;&amp;</span> <span class="ident">keys_two</span>.<span class="ident">iter</span>().<span class="ident">all</span>(<span class="op">|</span><span class="ident">key</span><span class="op">|</span> <span class="ident">Rc::strong_count</span>(<span class="ident">key</span>) <span class="op">==</span> <span class="number">1</span>)
);
<span class="ident">reclaim_memory</span>(<span class="kw-2">&amp;mut</span> <span class="ident">map</span>, <span class="kw-2">&amp;</span><span class="ident">keys_two</span>);
<span class="macro">assert!</span>(
<span class="ident">keys_one</span>.<span class="ident">iter</span>().<span class="ident">all</span>(<span class="op">|</span><span class="ident">key</span><span class="op">|</span> <span class="ident">Rc::strong_count</span>(<span class="ident">key</span>) <span class="op">==</span> <span class="number">1</span>)
<span class="op">&amp;&amp;</span> <span class="ident">keys_two</span>.<span class="ident">iter</span>().<span class="ident">all</span>(<span class="op">|</span><span class="ident">key</span><span class="op">|</span> <span class="ident">Rc::strong_count</span>(<span class="ident">key</span>) <span class="op">==</span> <span class="number">2</span>)
);
<span class="kw">fn</span> <span class="ident">reclaim_memory</span>(<span class="ident">map</span>: <span class="kw-2">&amp;mut</span> <span class="ident">HashMap</span><span class="op">&lt;</span><span class="ident">Rc</span><span class="op">&lt;</span><span class="ident">String</span><span class="op">&gt;</span>, <span class="ident">usize</span><span class="op">&gt;</span>, <span class="ident">keys</span>: <span class="kw-2">&amp;</span>[<span class="ident">Rc</span><span class="op">&lt;</span><span class="ident">String</span><span class="op">&gt;</span>]) {
<span class="kw">for</span> <span class="ident">key</span> <span class="kw">in</span> <span class="ident">keys</span> {
<span class="kw">if</span> <span class="kw">let</span> <span class="ident">Entry::Occupied</span>(<span class="ident">entry</span>) <span class="op">=</span> <span class="ident">map</span>.<span class="ident">entry</span>(<span class="ident">key</span>.<span class="ident">clone</span>()) {
<span class="comment">// Replaces the entry&#39;s key with our version of it in `keys`.</span>
<span class="ident">entry</span>.<span class="ident">replace_key</span>();
}
}
}</code></pre></div>
</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.replace_entry_with" class="method has-srclink"><span class="rightside"><a class="srclink" href="../../src/hashbrown/map.rs.html#5477-5505">source</a></span><h4 class="code-header">pub fn <a href="#method.replace_entry_with" class="fnname">replace_entry_with</a>&lt;F&gt;(self, f: F) -&gt; <a class="enum" href="enum.Entry.html" title="enum hashbrown::hash_map::Entry">Entry</a>&lt;'a, K, V, S, A&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;F: <a class="trait" href="https://doc.rust-lang.org/1.64.0/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(<a class="primitive" href="https://doc.rust-lang.org/1.64.0/std/primitive.reference.html">&amp;</a>K, V) -&gt; <a class="enum" href="https://doc.rust-lang.org/1.64.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a>&lt;V&gt;,&nbsp;</span></h4></section></summary><div class="docblock"><p>Provides shared access to the key and owned access to the value of
the entry and allows to replace or remove it based on the
value of the returned option.</p>
<h5 id="examples-10"><a href="#examples-10">Examples</a></h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use</span> <span class="ident">hashbrown::HashMap</span>;
<span class="kw">use</span> <span class="ident">hashbrown::hash_map::Entry</span>;
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">map</span>: <span class="ident">HashMap</span><span class="op">&lt;</span><span class="kw-2">&amp;</span><span class="ident">str</span>, <span class="ident">u32</span><span class="op">&gt;</span> <span class="op">=</span> <span class="ident">HashMap::new</span>();
<span class="ident">map</span>.<span class="ident">insert</span>(<span class="string">&quot;poneyland&quot;</span>, <span class="number">42</span>);
<span class="kw">let</span> <span class="ident">entry</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">map</span>.<span class="ident">entry</span>(<span class="string">&quot;poneyland&quot;</span>) {
<span class="ident">Entry::Occupied</span>(<span class="ident">e</span>) =&gt; {
<span class="ident">e</span>.<span class="ident">replace_entry_with</span>(<span class="op">|</span><span class="ident">k</span>, <span class="ident">v</span><span class="op">|</span> {
<span class="macro">assert_eq!</span>(<span class="ident">k</span>, <span class="kw-2">&amp;</span><span class="string">&quot;poneyland&quot;</span>);
<span class="macro">assert_eq!</span>(<span class="ident">v</span>, <span class="number">42</span>);
<span class="prelude-val">Some</span>(<span class="ident">v</span> <span class="op">+</span> <span class="number">1</span>)
})
}
<span class="ident">Entry::Vacant</span>(<span class="kw">_</span>) =&gt; <span class="macro">panic!</span>(),
};
<span class="kw">match</span> <span class="ident">entry</span> {
<span class="ident">Entry::Occupied</span>(<span class="ident">e</span>) =&gt; {
<span class="macro">assert_eq!</span>(<span class="ident">e</span>.<span class="ident">key</span>(), <span class="kw-2">&amp;</span><span class="string">&quot;poneyland&quot;</span>);
<span class="macro">assert_eq!</span>(<span class="ident">e</span>.<span class="ident">get</span>(), <span class="kw-2">&amp;</span><span class="number">43</span>);
}
<span class="ident">Entry::Vacant</span>(<span class="kw">_</span>) =&gt; <span class="macro">panic!</span>(),
}
<span class="macro">assert_eq!</span>(<span class="ident">map</span>[<span class="string">&quot;poneyland&quot;</span>], <span class="number">43</span>);
<span class="kw">let</span> <span class="ident">entry</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">map</span>.<span class="ident">entry</span>(<span class="string">&quot;poneyland&quot;</span>) {
<span class="ident">Entry::Occupied</span>(<span class="ident">e</span>) =&gt; <span class="ident">e</span>.<span class="ident">replace_entry_with</span>(<span class="op">|</span><span class="ident">_k</span>, <span class="ident">_v</span><span class="op">|</span> <span class="prelude-val">None</span>),
<span class="ident">Entry::Vacant</span>(<span class="kw">_</span>) =&gt; <span class="macro">panic!</span>(),
};
<span class="kw">match</span> <span class="ident">entry</span> {
<span class="ident">Entry::Vacant</span>(<span class="ident">e</span>) =&gt; {
<span class="macro">assert_eq!</span>(<span class="ident">e</span>.<span class="ident">key</span>(), <span class="kw-2">&amp;</span><span class="string">&quot;poneyland&quot;</span>);
}
<span class="ident">Entry::Occupied</span>(<span class="kw">_</span>) =&gt; <span class="macro">panic!</span>(),
}
<span class="macro">assert!</span>(<span class="op">!</span><span class="ident">map</span>.<span class="ident">contains_key</span>(<span class="string">&quot;poneyland&quot;</span>));</code></pre></div>
</div></details></div></details></div><h2 id="trait-implementations" class="small-section-header">Trait Implementations<a href="#trait-implementations" class="anchor"></a></h2><div id="trait-implementations-list"><details class="rustdoc-toggle implementors-toggle" open><summary><section id="impl-Debug-for-OccupiedEntry%3C%27_%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="impl has-srclink"><span class="rightside"><a class="srclink" href="../../src/hashbrown/map.rs.html#4218-4225">source</a></span><a href="#impl-Debug-for-OccupiedEntry%3C%27_%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="anchor"></a><h3 class="code-header in-band">impl&lt;K:&nbsp;<a class="trait" href="https://doc.rust-lang.org/1.64.0/core/fmt/trait.Debug.html" title="trait core::fmt::Debug">Debug</a>, V:&nbsp;<a class="trait" href="https://doc.rust-lang.org/1.64.0/core/fmt/trait.Debug.html" title="trait core::fmt::Debug">Debug</a>, S, A:&nbsp;Allocator + <a class="trait" href="https://doc.rust-lang.org/1.64.0/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a>&gt; <a class="trait" href="https://doc.rust-lang.org/1.64.0/core/fmt/trait.Debug.html" title="trait core::fmt::Debug">Debug</a> for <a class="struct" href="struct.OccupiedEntry.html" title="struct hashbrown::hash_map::OccupiedEntry">OccupiedEntry</a>&lt;'_, K, V, S, A&gt;</h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.fmt" class="method trait-impl has-srclink"><span class="rightside"><a class="srclink" href="../../src/hashbrown/map.rs.html#4219-4224">source</a></span><a href="#method.fmt" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.64.0/core/fmt/trait.Debug.html#tymethod.fmt" class="fnname">fmt</a>(&amp;self, f: &amp;mut <a class="struct" href="https://doc.rust-lang.org/1.64.0/core/fmt/struct.Formatter.html" title="struct core::fmt::Formatter">Formatter</a>&lt;'_&gt;) -&gt; <a class="type" href="https://doc.rust-lang.org/1.64.0/core/fmt/type.Result.html" title="type core::fmt::Result">Result</a></h4></section></summary><div class='docblock'><p>Formats the value using the given formatter. <a href="https://doc.rust-lang.org/1.64.0/core/fmt/trait.Debug.html#tymethod.fmt">Read more</a></p>
</div></details></div></details><section id="impl-Send-for-OccupiedEntry%3C%27_%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="impl has-srclink"><span class="rightside"><a class="srclink" href="../../src/hashbrown/map.rs.html#4201-4208">source</a></span><a href="#impl-Send-for-OccupiedEntry%3C%27_%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="anchor"></a><h3 class="code-header in-band">impl&lt;K, V, S, A&gt; <a class="trait" href="https://doc.rust-lang.org/1.64.0/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> for <a class="struct" href="struct.OccupiedEntry.html" title="struct hashbrown::hash_map::OccupiedEntry">OccupiedEntry</a>&lt;'_, K, V, S, A&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;K: <a class="trait" href="https://doc.rust-lang.org/1.64.0/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a>,<br>&nbsp;&nbsp;&nbsp;&nbsp;V: <a class="trait" href="https://doc.rust-lang.org/1.64.0/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a>,<br>&nbsp;&nbsp;&nbsp;&nbsp;S: <a class="trait" href="https://doc.rust-lang.org/1.64.0/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a>,<br>&nbsp;&nbsp;&nbsp;&nbsp;A: <a class="trait" href="https://doc.rust-lang.org/1.64.0/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> + Allocator + <a class="trait" href="https://doc.rust-lang.org/1.64.0/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a>,&nbsp;</span></h3></section><section id="impl-Sync-for-OccupiedEntry%3C%27_%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="impl has-srclink"><span class="rightside"><a class="srclink" href="../../src/hashbrown/map.rs.html#4209-4216">source</a></span><a href="#impl-Sync-for-OccupiedEntry%3C%27_%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="anchor"></a><h3 class="code-header in-band">impl&lt;K, V, S, A&gt; <a class="trait" href="https://doc.rust-lang.org/1.64.0/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a> for <a class="struct" href="struct.OccupiedEntry.html" title="struct hashbrown::hash_map::OccupiedEntry">OccupiedEntry</a>&lt;'_, K, V, S, A&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;K: <a class="trait" href="https://doc.rust-lang.org/1.64.0/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a>,<br>&nbsp;&nbsp;&nbsp;&nbsp;V: <a class="trait" href="https://doc.rust-lang.org/1.64.0/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a>,<br>&nbsp;&nbsp;&nbsp;&nbsp;S: <a class="trait" href="https://doc.rust-lang.org/1.64.0/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a>,<br>&nbsp;&nbsp;&nbsp;&nbsp;A: <a class="trait" href="https://doc.rust-lang.org/1.64.0/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a> + Allocator + <a class="trait" href="https://doc.rust-lang.org/1.64.0/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a>,&nbsp;</span></h3></section></div><h2 id="synthetic-implementations" class="small-section-header">Auto Trait Implementations<a href="#synthetic-implementations" class="anchor"></a></h2><div id="synthetic-implementations-list"><section id="impl-RefUnwindSafe-for-OccupiedEntry%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="impl has-srclink"><a href="#impl-RefUnwindSafe-for-OccupiedEntry%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="anchor"></a><h3 class="code-header in-band">impl&lt;'a, K, V, S, A&gt; <a class="trait" href="https://doc.rust-lang.org/1.64.0/core/panic/unwind_safe/trait.RefUnwindSafe.html" title="trait core::panic::unwind_safe::RefUnwindSafe">RefUnwindSafe</a> for <a class="struct" href="struct.OccupiedEntry.html" title="struct hashbrown::hash_map::OccupiedEntry">OccupiedEntry</a>&lt;'a, K, V, S, A&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;A: <a class="trait" href="https://doc.rust-lang.org/1.64.0/core/panic/unwind_safe/trait.RefUnwindSafe.html" title="trait core::panic::unwind_safe::RefUnwindSafe">RefUnwindSafe</a>,<br>&nbsp;&nbsp;&nbsp;&nbsp;K: <a class="trait" href="https://doc.rust-lang.org/1.64.0/core/panic/unwind_safe/trait.RefUnwindSafe.html" title="trait core::panic::unwind_safe::RefUnwindSafe">RefUnwindSafe</a>,<br>&nbsp;&nbsp;&nbsp;&nbsp;S: <a class="trait" href="https://doc.rust-lang.org/1.64.0/core/panic/unwind_safe/trait.RefUnwindSafe.html" title="trait core::panic::unwind_safe::RefUnwindSafe">RefUnwindSafe</a>,<br>&nbsp;&nbsp;&nbsp;&nbsp;V: <a class="trait" href="https://doc.rust-lang.org/1.64.0/core/panic/unwind_safe/trait.RefUnwindSafe.html" title="trait core::panic::unwind_safe::RefUnwindSafe">RefUnwindSafe</a>,&nbsp;</span></h3></section><section id="impl-Unpin-for-OccupiedEntry%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="impl has-srclink"><a href="#impl-Unpin-for-OccupiedEntry%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="anchor"></a><h3 class="code-header in-band">impl&lt;'a, K, V, S, A&gt; <a class="trait" href="https://doc.rust-lang.org/1.64.0/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a> for <a class="struct" href="struct.OccupiedEntry.html" title="struct hashbrown::hash_map::OccupiedEntry">OccupiedEntry</a>&lt;'a, K, V, S, A&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;K: <a class="trait" href="https://doc.rust-lang.org/1.64.0/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a>,&nbsp;</span></h3></section><section id="impl-UnwindSafe-for-OccupiedEntry%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="impl has-srclink"><a href="#impl-UnwindSafe-for-OccupiedEntry%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="anchor"></a><h3 class="code-header in-band">impl&lt;'a, K, V, S, A&nbsp;=&nbsp;Global&gt; !<a class="trait" href="https://doc.rust-lang.org/1.64.0/core/panic/unwind_safe/trait.UnwindSafe.html" title="trait core::panic::unwind_safe::UnwindSafe">UnwindSafe</a> for <a class="struct" href="struct.OccupiedEntry.html" title="struct hashbrown::hash_map::OccupiedEntry">OccupiedEntry</a>&lt;'a, K, V, S, A&gt;</h3></section></div><h2 id="blanket-implementations" class="small-section-header">Blanket Implementations<a href="#blanket-implementations" class="anchor"></a></h2><div id="blanket-implementations-list"><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-Any-for-OccupiedEntry%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="impl has-srclink"><span class="rightside"><a class="srclink" href="https://doc.rust-lang.org/1.64.0/src/core/any.rs.html#203">source</a></span><a href="#impl-Any-for-OccupiedEntry%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="anchor"></a><h3 class="code-header in-band">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/1.64.0/core/any/trait.Any.html" title="trait core::any::Any">Any</a> for T <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;T: 'static + ?<a class="trait" href="https://doc.rust-lang.org/1.64.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,&nbsp;</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.type_id" class="method trait-impl has-srclink"><span class="rightside"><a class="srclink" href="https://doc.rust-lang.org/1.64.0/src/core/any.rs.html#204">source</a></span><a href="#method.type_id" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.64.0/core/any/trait.Any.html#tymethod.type_id" class="fnname">type_id</a>(&amp;self) -&gt; <a class="struct" href="https://doc.rust-lang.org/1.64.0/core/any/struct.TypeId.html" title="struct core::any::TypeId">TypeId</a></h4></section></summary><div class='docblock'><p>Gets the <code>TypeId</code> of <code>self</code>. <a href="https://doc.rust-lang.org/1.64.0/core/any/trait.Any.html#tymethod.type_id">Read more</a></p>
</div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-Borrow%3CT%3E-for-OccupiedEntry%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="impl has-srclink"><span class="rightside"><a class="srclink" href="https://doc.rust-lang.org/1.64.0/src/core/borrow.rs.html#209">source</a></span><a href="#impl-Borrow%3CT%3E-for-OccupiedEntry%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="anchor"></a><h3 class="code-header in-band">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/1.64.0/core/borrow/trait.Borrow.html" title="trait core::borrow::Borrow">Borrow</a>&lt;T&gt; for T <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;T: ?<a class="trait" href="https://doc.rust-lang.org/1.64.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,&nbsp;</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.borrow" class="method trait-impl has-srclink"><span class="rightside"><span class="since" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/91522" title="Tracking issue for const_borrow">unstable</a></span> · <a class="srclink" href="https://doc.rust-lang.org/1.64.0/src/core/borrow.rs.html#211">source</a></span><a href="#method.borrow" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.64.0/core/borrow/trait.Borrow.html#tymethod.borrow" class="fnname">borrow</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.64.0/std/primitive.reference.html">&amp;</a>T</h4></section></summary><div class='docblock'><p>Immutably borrows from an owned value. <a href="https://doc.rust-lang.org/1.64.0/core/borrow/trait.Borrow.html#tymethod.borrow">Read more</a></p>
</div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-BorrowMut%3CT%3E-for-OccupiedEntry%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="impl has-srclink"><span class="rightside"><a class="srclink" href="https://doc.rust-lang.org/1.64.0/src/core/borrow.rs.html#218">source</a></span><a href="#impl-BorrowMut%3CT%3E-for-OccupiedEntry%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="anchor"></a><h3 class="code-header in-band">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/1.64.0/core/borrow/trait.BorrowMut.html" title="trait core::borrow::BorrowMut">BorrowMut</a>&lt;T&gt; for T <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;T: ?<a class="trait" href="https://doc.rust-lang.org/1.64.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,&nbsp;</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.borrow_mut" class="method trait-impl has-srclink"><span class="rightside"><span class="since" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/91522" title="Tracking issue for const_borrow">unstable</a></span> · <a class="srclink" href="https://doc.rust-lang.org/1.64.0/src/core/borrow.rs.html#219">source</a></span><a href="#method.borrow_mut" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.64.0/core/borrow/trait.BorrowMut.html#tymethod.borrow_mut" class="fnname">borrow_mut</a>(&amp;mut self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.64.0/std/primitive.reference.html">&amp;mut </a>T</h4></section></summary><div class='docblock'><p>Mutably borrows from an owned value. <a href="https://doc.rust-lang.org/1.64.0/core/borrow/trait.BorrowMut.html#tymethod.borrow_mut">Read more</a></p>
</div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-From%3CT%3E-for-OccupiedEntry%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="impl has-srclink"><span class="rightside"><a class="srclink" href="https://doc.rust-lang.org/1.64.0/src/core/convert/mod.rs.html#557">source</a></span><a href="#impl-From%3CT%3E-for-OccupiedEntry%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="anchor"></a><h3 class="code-header in-band">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/1.64.0/core/convert/trait.From.html" title="trait core::convert::From">From</a>&lt;T&gt; for T</h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.from" class="method trait-impl has-srclink"><span class="rightside"><span class="since" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/88674" title="Tracking issue for const_convert">unstable</a></span> · <a class="srclink" href="https://doc.rust-lang.org/1.64.0/src/core/convert/mod.rs.html#559">source</a></span><a href="#method.from" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.64.0/core/convert/trait.From.html#tymethod.from" class="fnname">from</a>(t: T) -&gt; T</h4></section></summary><div class="docblock"><p>Returns the argument unchanged.</p>
</div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-Into%3CU%3E-for-OccupiedEntry%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="impl has-srclink"><span class="rightside"><a class="srclink" href="https://doc.rust-lang.org/1.64.0/src/core/convert/mod.rs.html#541">source</a></span><a href="#impl-Into%3CU%3E-for-OccupiedEntry%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="anchor"></a><h3 class="code-header in-band">impl&lt;T, U&gt; <a class="trait" href="https://doc.rust-lang.org/1.64.0/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a>&lt;U&gt; for T <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;U: <a class="trait" href="https://doc.rust-lang.org/1.64.0/core/convert/trait.From.html" title="trait core::convert::From">From</a>&lt;T&gt;,&nbsp;</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.into" class="method trait-impl has-srclink"><span class="rightside"><span class="since" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/88674" title="Tracking issue for const_convert">unstable</a></span> · <a class="srclink" href="https://doc.rust-lang.org/1.64.0/src/core/convert/mod.rs.html#549">source</a></span><a href="#method.into" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.64.0/core/convert/trait.Into.html#tymethod.into" class="fnname">into</a>(self) -&gt; U</h4></section></summary><div class="docblock"><p>Calls <code>U::from(self)</code>.</p>
<p>That is, this conversion is whatever the implementation of
<code><a href="https://doc.rust-lang.org/1.64.0/core/convert/trait.From.html" title="From">From</a>&lt;T&gt; for U</code> chooses to do.</p>
</div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-TryFrom%3CU%3E-for-OccupiedEntry%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="impl has-srclink"><span class="rightside"><a class="srclink" href="https://doc.rust-lang.org/1.64.0/src/core/convert/mod.rs.html#598">source</a></span><a href="#impl-TryFrom%3CU%3E-for-OccupiedEntry%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="anchor"></a><h3 class="code-header in-band">impl&lt;T, U&gt; <a class="trait" href="https://doc.rust-lang.org/1.64.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a>&lt;U&gt; for T <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;U: <a class="trait" href="https://doc.rust-lang.org/1.64.0/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a>&lt;T&gt;,&nbsp;</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle" open><summary><section id="associatedtype.Error" class="associatedtype trait-impl has-srclink"><a href="#associatedtype.Error" class="anchor"></a><h4 class="code-header">type <a href="https://doc.rust-lang.org/1.64.0/core/convert/trait.TryFrom.html#associatedtype.Error" class="associatedtype">Error</a> = <a class="enum" href="https://doc.rust-lang.org/1.64.0/core/convert/enum.Infallible.html" title="enum core::convert::Infallible">Infallible</a></h4></section></summary><div class='docblock'><p>The type returned in the event of a conversion error.</p>
</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.try_from" class="method trait-impl has-srclink"><span class="rightside"><span class="since" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/88674" title="Tracking issue for const_convert">unstable</a></span> · <a class="srclink" href="https://doc.rust-lang.org/1.64.0/src/core/convert/mod.rs.html#604">source</a></span><a href="#method.try_from" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.64.0/core/convert/trait.TryFrom.html#tymethod.try_from" class="fnname">try_from</a>(value: U) -&gt; <a class="enum" href="https://doc.rust-lang.org/1.64.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;T, &lt;T as <a class="trait" href="https://doc.rust-lang.org/1.64.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a>&lt;U&gt;&gt;::<a class="associatedtype" href="https://doc.rust-lang.org/1.64.0/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a>&gt;</h4></section></summary><div class='docblock'><p>Performs the conversion.</p>
</div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-TryInto%3CU%3E-for-OccupiedEntry%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="impl has-srclink"><span class="rightside"><a class="srclink" href="https://doc.rust-lang.org/1.64.0/src/core/convert/mod.rs.html#583">source</a></span><a href="#impl-TryInto%3CU%3E-for-OccupiedEntry%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="anchor"></a><h3 class="code-header in-band">impl&lt;T, U&gt; <a class="trait" href="https://doc.rust-lang.org/1.64.0/core/convert/trait.TryInto.html" title="trait core::convert::TryInto">TryInto</a>&lt;U&gt; for T <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;U: <a class="trait" href="https://doc.rust-lang.org/1.64.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a>&lt;T&gt;,&nbsp;</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle" open><summary><section id="associatedtype.Error-1" class="associatedtype trait-impl has-srclink"><a href="#associatedtype.Error-1" class="anchor"></a><h4 class="code-header">type <a href="https://doc.rust-lang.org/1.64.0/core/convert/trait.TryInto.html#associatedtype.Error" class="associatedtype">Error</a> = &lt;U as <a class="trait" href="https://doc.rust-lang.org/1.64.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a>&lt;T&gt;&gt;::<a class="associatedtype" href="https://doc.rust-lang.org/1.64.0/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a></h4></section></summary><div class='docblock'><p>The type returned in the event of a conversion error.</p>
</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.try_into" class="method trait-impl has-srclink"><span class="rightside"><span class="since" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/88674" title="Tracking issue for const_convert">unstable</a></span> · <a class="srclink" href="https://doc.rust-lang.org/1.64.0/src/core/convert/mod.rs.html#589">source</a></span><a href="#method.try_into" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.64.0/core/convert/trait.TryInto.html#tymethod.try_into" class="fnname">try_into</a>(self) -&gt; <a class="enum" href="https://doc.rust-lang.org/1.64.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;U, &lt;U as <a class="trait" href="https://doc.rust-lang.org/1.64.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a>&lt;T&gt;&gt;::<a class="associatedtype" href="https://doc.rust-lang.org/1.64.0/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a>&gt;</h4></section></summary><div class='docblock'><p>Performs the conversion.</p>
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