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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 a single entry in a map, which may either be vacant or occupied."><meta name="keywords" content="rust, rustlang, rust-lang, RawEntryMut"><title>RawEntryMut 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 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class="sidebar-menu-toggle">&#9776;</button><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></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="#">RawEntryMut</a></h2><div class="sidebar-elems"><section><h3><a href="#variants">Variants</a></h3><ul class="block"><li><a href="#variant.Occupied">Occupied</a></li><li><a href="#variant.Vacant">Vacant</a></li></ul><h3><a href="#implementations">Methods</a></h3><ul class="block"><li><a href="#method.and_modify">and_modify</a></li><li><a href="#method.and_replace_entry_with">and_replace_entry_with</a></li><li><a href="#method.insert">insert</a></li><li><a href="#method.or_insert">or_insert</a></li><li><a href="#method.or_insert_with">or_insert_with</a></li></ul><h3><a href="#trait-implementations">Trait Implementations</a></h3><ul class="block"><li><a href="#impl-Debug-for-RawEntryMut%3C%27_%2C%20K%2C%20V%2C%20S%2C%20A%3E">Debug</a></li></ul><h3><a href="#synthetic-implementations">Auto Trait Implementations</a></h3><ul class="block"><li><a href="#impl-RefUnwindSafe-for-RawEntryMut%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E">RefUnwindSafe</a></li><li><a href="#impl-Send-for-RawEntryMut%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E">Send</a></li><li><a href="#impl-Sync-for-RawEntryMut%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E">Sync</a></li><li><a href="#impl-Unpin-for-RawEntryMut%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E">Unpin</a></li><li><a href="#impl-UnwindSafe-for-RawEntryMut%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E">!UnwindSafe</a></li></ul><h3><a href="#blanket-implementations">Blanket Implementations</a></h3><ul class="block"><li><a href="#impl-Any-for-RawEntryMut%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E">Any</a></li><li><a href="#impl-Borrow%3CT%3E-for-RawEntryMut%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-RawEntryMut%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-RawEntryMut%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-RawEntryMut%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-RawEntryMut%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-RawEntryMut%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E">TryInto&lt;U&gt;</a></li></ul></section><h2><a href="index.html">In hashbrown::hash_map</a></h2></div></nav><main><div class="width-limiter"><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"><a href="../../help.html">?</a></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><section id="main-content" class="content"><div class="main-heading"><h1 class="fqn">Enum <a href="../index.html">hashbrown</a>::<wbr><a href="index.html">hash_map</a>::<wbr><a class="enum" href="#">RawEntryMut</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></h1><span class="out-of-band"><a class="srclink" href="../../src/hashbrown/map.rs.html#2882-2911">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="item-decl"><pre class="rust enum"><code>pub enum RawEntryMut&lt;'a, K, V, S, A:&nbsp;Allocator + <a class="trait" href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a>&nbsp;=&nbsp;Global&gt; {
Occupied(<a class="struct" href="struct.RawOccupiedEntryMut.html" title="struct hashbrown::hash_map::RawOccupiedEntryMut">RawOccupiedEntryMut</a>&lt;'a, K, V, S, A&gt;),
Vacant(<a class="struct" href="struct.RawVacantEntryMut.html" title="struct hashbrown::hash_map::RawVacantEntryMut">RawVacantEntryMut</a>&lt;'a, K, V, S, A&gt;),
}</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 a single entry in a map, which may either be vacant or occupied.</p>
<p>This is a lower-level version of <a href="enum.Entry.html"><code>Entry</code></a>.</p>
<p>This <code>enum</code> is constructed through the <a href="struct.HashMap.html#method.raw_entry_mut"><code>raw_entry_mut</code></a> method on <a href="struct.HashMap.html"><code>HashMap</code></a>,
then calling one of the methods of that <a href="struct.RawEntryBuilderMut.html"><code>RawEntryBuilderMut</code></a>.</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>core::hash::{BuildHasher, Hash};
<span class="kw">use </span>hashbrown::hash_map::{HashMap, RawEntryMut, RawOccupiedEntryMut};
<span class="kw">let </span><span class="kw-2">mut </span>map = HashMap::new();
map.extend([(<span class="string">&#39;a&#39;</span>, <span class="number">1</span>), (<span class="string">&#39;b&#39;</span>, <span class="number">2</span>), (<span class="string">&#39;c&#39;</span>, <span class="number">3</span>)]);
<span class="macro">assert_eq!</span>(map.len(), <span class="number">3</span>);
<span class="kw">fn </span>compute_hash&lt;K: Hash + <span class="question-mark">?</span>Sized, S: BuildHasher&gt;(hash_builder: <span class="kw-2">&amp;</span>S, key: <span class="kw-2">&amp;</span>K) -&gt; u64 {
<span class="kw">use </span>core::hash::Hasher;
<span class="kw">let </span><span class="kw-2">mut </span>state = hash_builder.build_hasher();
key.hash(<span class="kw-2">&amp;mut </span>state);
state.finish()
}
<span class="comment">// Existing key (insert)
</span><span class="kw">let </span>raw: RawEntryMut&lt;<span class="kw">_</span>, <span class="kw">_</span>, <span class="kw">_</span>&gt; = map.raw_entry_mut().from_key(<span class="kw-2">&amp;</span><span class="string">&#39;a&#39;</span>);
<span class="kw">let </span>_raw_o: RawOccupiedEntryMut&lt;<span class="kw">_</span>, <span class="kw">_</span>, <span class="kw">_</span>&gt; = raw.insert(<span class="string">&#39;a&#39;</span>, <span class="number">10</span>);
<span class="macro">assert_eq!</span>(map.len(), <span class="number">3</span>);
<span class="comment">// Nonexistent key (insert)
</span>map.raw_entry_mut().from_key(<span class="kw-2">&amp;</span><span class="string">&#39;d&#39;</span>).insert(<span class="string">&#39;d&#39;</span>, <span class="number">40</span>);
<span class="macro">assert_eq!</span>(map.len(), <span class="number">4</span>);
<span class="comment">// Existing key (or_insert)
</span><span class="kw">let </span>hash = compute_hash(map.hasher(), <span class="kw-2">&amp;</span><span class="string">&#39;b&#39;</span>);
<span class="kw">let </span>kv = map
.raw_entry_mut()
.from_key_hashed_nocheck(hash, <span class="kw-2">&amp;</span><span class="string">&#39;b&#39;</span>)
.or_insert(<span class="string">&#39;b&#39;</span>, <span class="number">20</span>);
<span class="macro">assert_eq!</span>(kv, (<span class="kw-2">&amp;mut </span><span class="string">&#39;b&#39;</span>, <span class="kw-2">&amp;mut </span><span class="number">2</span>));
<span class="kw-2">*</span>kv.<span class="number">1 </span>= <span class="number">20</span>;
<span class="macro">assert_eq!</span>(map.len(), <span class="number">4</span>);
<span class="comment">// Nonexistent key (or_insert)
</span><span class="kw">let </span>hash = compute_hash(map.hasher(), <span class="kw-2">&amp;</span><span class="string">&#39;e&#39;</span>);
<span class="kw">let </span>kv = map
.raw_entry_mut()
.from_key_hashed_nocheck(hash, <span class="kw-2">&amp;</span><span class="string">&#39;e&#39;</span>)
.or_insert(<span class="string">&#39;e&#39;</span>, <span class="number">50</span>);
<span class="macro">assert_eq!</span>(kv, (<span class="kw-2">&amp;mut </span><span class="string">&#39;e&#39;</span>, <span class="kw-2">&amp;mut </span><span class="number">50</span>));
<span class="macro">assert_eq!</span>(map.len(), <span class="number">5</span>);
<span class="comment">// Existing key (or_insert_with)
</span><span class="kw">let </span>hash = compute_hash(map.hasher(), <span class="kw-2">&amp;</span><span class="string">&#39;c&#39;</span>);
<span class="kw">let </span>kv = map
.raw_entry_mut()
.from_hash(hash, |q| q == <span class="kw-2">&amp;</span><span class="string">&#39;c&#39;</span>)
.or_insert_with(|| (<span class="string">&#39;c&#39;</span>, <span class="number">30</span>));
<span class="macro">assert_eq!</span>(kv, (<span class="kw-2">&amp;mut </span><span class="string">&#39;c&#39;</span>, <span class="kw-2">&amp;mut </span><span class="number">3</span>));
<span class="kw-2">*</span>kv.<span class="number">1 </span>= <span class="number">30</span>;
<span class="macro">assert_eq!</span>(map.len(), <span class="number">5</span>);
<span class="comment">// Nonexistent key (or_insert_with)
</span><span class="kw">let </span>hash = compute_hash(map.hasher(), <span class="kw-2">&amp;</span><span class="string">&#39;f&#39;</span>);
<span class="kw">let </span>kv = map
.raw_entry_mut()
.from_hash(hash, |q| q == <span class="kw-2">&amp;</span><span class="string">&#39;f&#39;</span>)
.or_insert_with(|| (<span class="string">&#39;f&#39;</span>, <span class="number">60</span>));
<span class="macro">assert_eq!</span>(kv, (<span class="kw-2">&amp;mut </span><span class="string">&#39;f&#39;</span>, <span class="kw-2">&amp;mut </span><span class="number">60</span>));
<span class="macro">assert_eq!</span>(map.len(), <span class="number">6</span>);
<span class="macro">println!</span>(<span class="string">&quot;Our HashMap: {:?}&quot;</span>, map);
<span class="kw">let </span><span class="kw-2">mut </span>vec: Vec&lt;<span class="kw">_</span>&gt; = map.iter().map(|(<span class="kw-2">&amp;</span>k, <span class="kw-2">&amp;</span>v)| (k, v)).collect();
<span class="comment">// The `Iter` iterator produces items in arbitrary order, so the
// items must be sorted to test them against a sorted array.
</span>vec.sort_unstable();
<span class="macro">assert_eq!</span>(vec, [(<span class="string">&#39;a&#39;</span>, <span class="number">10</span>), (<span class="string">&#39;b&#39;</span>, <span class="number">20</span>), (<span class="string">&#39;c&#39;</span>, <span class="number">30</span>), (<span class="string">&#39;d&#39;</span>, <span class="number">40</span>), (<span class="string">&#39;e&#39;</span>, <span class="number">50</span>), (<span class="string">&#39;f&#39;</span>, <span class="number">60</span>)]);</code></pre></div>
</div></details><h2 id="variants" class="variants small-section-header">Variants<a href="#variants" class="anchor"></a></h2><h3 id="variant.Occupied" class="variant small-section-header"><a href="#variant.Occupied" class="anchor field"></a><code>Occupied(<a class="struct" href="struct.RawOccupiedEntryMut.html" title="struct hashbrown::hash_map::RawOccupiedEntryMut">RawOccupiedEntryMut</a>&lt;'a, K, V, S, A&gt;)</code></h3><div class="docblock"><p>An occupied entry.</p>
<h4 id="examples-1"><a href="#examples-1">Examples</a></h4>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>hashbrown::{hash_map::RawEntryMut, HashMap};
<span class="kw">let </span><span class="kw-2">mut </span>map: HashMap&lt;<span class="kw">_</span>, <span class="kw">_</span>&gt; = [(<span class="string">&quot;a&quot;</span>, <span class="number">100</span>), (<span class="string">&quot;b&quot;</span>, <span class="number">200</span>)].into();
<span class="kw">match </span>map.raw_entry_mut().from_key(<span class="kw-2">&amp;</span><span class="string">&quot;a&quot;</span>) {
RawEntryMut::Vacant(<span class="kw">_</span>) =&gt; <span class="macro">unreachable!</span>(),
RawEntryMut::Occupied(<span class="kw">_</span>) =&gt; { }
}</code></pre></div>
</div><h3 id="variant.Vacant" class="variant small-section-header"><a href="#variant.Vacant" class="anchor field"></a><code>Vacant(<a class="struct" href="struct.RawVacantEntryMut.html" title="struct hashbrown::hash_map::RawVacantEntryMut">RawVacantEntryMut</a>&lt;'a, K, V, S, A&gt;)</code></h3><div class="docblock"><p>A vacant entry.</p>
<h4 id="examples-2"><a href="#examples-2">Examples</a></h4>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>hashbrown::{hash_map::RawEntryMut, HashMap};
<span class="kw">let </span><span class="kw-2">mut </span>map: HashMap&lt;<span class="kw-2">&amp;</span>str, i32&gt; = HashMap::new();
<span class="kw">match </span>map.raw_entry_mut().from_key(<span class="string">&quot;a&quot;</span>) {
RawEntryMut::Occupied(<span class="kw">_</span>) =&gt; <span class="macro">unreachable!</span>(),
RawEntryMut::Vacant(<span class="kw">_</span>) =&gt; { }
}</code></pre></div>
</div><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-RawEntryMut%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="impl has-srclink"><a class="srclink rightside" href="../../src/hashbrown/map.rs.html#3292-3484">source</a><a href="#impl-RawEntryMut%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="anchor"></a><h3 class="code-header">impl&lt;'a, K, V, S, A:&nbsp;Allocator + <a class="trait" href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a>&gt; <a class="enum" href="enum.RawEntryMut.html" title="enum hashbrown::hash_map::RawEntryMut">RawEntryMut</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.insert" class="method has-srclink"><a class="srclink rightside" href="../../src/hashbrown/map.rs.html#3306-3318">source</a><h4 class="code-header">pub fn <a href="#method.insert" class="fnname">insert</a>(self, key: K, value: V) -&gt; <a class="struct" href="struct.RawOccupiedEntryMut.html" title="struct hashbrown::hash_map::RawOccupiedEntryMut">RawOccupiedEntryMut</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/nightly/core/hash/trait.Hash.html" title="trait core::hash::Hash">Hash</a>,<br>&nbsp;&nbsp;&nbsp;&nbsp;S: <a class="trait" href="https://doc.rust-lang.org/nightly/core/hash/trait.BuildHasher.html" title="trait core::hash::BuildHasher">BuildHasher</a>,</span></h4></section></summary><div class="docblock"><p>Sets the value of the entry, and returns a RawOccupiedEntryMut.</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>hashbrown::HashMap;
<span class="kw">let </span><span class="kw-2">mut </span>map: HashMap&lt;<span class="kw-2">&amp;</span>str, u32&gt; = HashMap::new();
<span class="kw">let </span>entry = map.raw_entry_mut().from_key(<span class="string">&quot;horseyland&quot;</span>).insert(<span class="string">&quot;horseyland&quot;</span>, <span class="number">37</span>);
<span class="macro">assert_eq!</span>(entry.remove_entry(), (<span class="string">&quot;horseyland&quot;</span>, <span class="number">37</span>));</code></pre></div>
</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.or_insert" class="method has-srclink"><a class="srclink rightside" href="../../src/hashbrown/map.rs.html#3337-3346">source</a><h4 class="code-header">pub fn <a href="#method.or_insert" class="fnname">or_insert</a>(self, default_key: K, default_val: V) -&gt; (<a class="primitive" href="https://doc.rust-lang.org/nightly/core/primitive.reference.html">&amp;'a mut </a>K, <a class="primitive" href="https://doc.rust-lang.org/nightly/core/primitive.reference.html">&amp;'a mut </a>V)<span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;K: <a class="trait" href="https://doc.rust-lang.org/nightly/core/hash/trait.Hash.html" title="trait core::hash::Hash">Hash</a>,<br>&nbsp;&nbsp;&nbsp;&nbsp;S: <a class="trait" href="https://doc.rust-lang.org/nightly/core/hash/trait.BuildHasher.html" title="trait core::hash::BuildHasher">BuildHasher</a>,</span></h4></section></summary><div class="docblock"><p>Ensures a value is in the entry by inserting the default if empty, and returns
mutable references to the key and value in the entry.</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>hashbrown::HashMap;
<span class="kw">let </span><span class="kw-2">mut </span>map: HashMap&lt;<span class="kw-2">&amp;</span>str, u32&gt; = HashMap::new();
map.raw_entry_mut().from_key(<span class="string">&quot;poneyland&quot;</span>).or_insert(<span class="string">&quot;poneyland&quot;</span>, <span class="number">3</span>);
<span class="macro">assert_eq!</span>(map[<span class="string">&quot;poneyland&quot;</span>], <span class="number">3</span>);
<span class="kw-2">*</span>map.raw_entry_mut().from_key(<span class="string">&quot;poneyland&quot;</span>).or_insert(<span class="string">&quot;poneyland&quot;</span>, <span class="number">10</span>).<span class="number">1 </span><span class="kw-2">*</span>= <span class="number">2</span>;
<span class="macro">assert_eq!</span>(map[<span class="string">&quot;poneyland&quot;</span>], <span class="number">6</span>);</code></pre></div>
</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.or_insert_with" class="method has-srclink"><a class="srclink rightside" href="../../src/hashbrown/map.rs.html#3365-3378">source</a><h4 class="code-header">pub fn <a href="#method.or_insert_with" class="fnname">or_insert_with</a>&lt;F&gt;(self, default: F) -&gt; (<a class="primitive" href="https://doc.rust-lang.org/nightly/core/primitive.reference.html">&amp;'a mut </a>K, <a class="primitive" href="https://doc.rust-lang.org/nightly/core/primitive.reference.html">&amp;'a mut </a>V)<span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>() -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/core/primitive.tuple.html">(K, V)</a>,<br>&nbsp;&nbsp;&nbsp;&nbsp;K: <a class="trait" href="https://doc.rust-lang.org/nightly/core/hash/trait.Hash.html" title="trait core::hash::Hash">Hash</a>,<br>&nbsp;&nbsp;&nbsp;&nbsp;S: <a class="trait" href="https://doc.rust-lang.org/nightly/core/hash/trait.BuildHasher.html" title="trait core::hash::BuildHasher">BuildHasher</a>,</span></h4></section></summary><div class="docblock"><p>Ensures a value is in the entry by inserting the result of the default function if empty,
and returns mutable references to the key and value in the entry.</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>hashbrown::HashMap;
<span class="kw">let </span><span class="kw-2">mut </span>map: HashMap&lt;<span class="kw-2">&amp;</span>str, String&gt; = HashMap::new();
map.raw_entry_mut().from_key(<span class="string">&quot;poneyland&quot;</span>).or_insert_with(|| {
(<span class="string">&quot;poneyland&quot;</span>, <span class="string">&quot;hoho&quot;</span>.to_string())
});
<span class="macro">assert_eq!</span>(map[<span class="string">&quot;poneyland&quot;</span>], <span class="string">&quot;hoho&quot;</span>.to_string());</code></pre></div>
</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.and_modify" class="method has-srclink"><a class="srclink rightside" href="../../src/hashbrown/map.rs.html#3403-3417">source</a><h4 class="code-header">pub fn <a href="#method.and_modify" class="fnname">and_modify</a>&lt;F&gt;(self, f: F) -&gt; Self<span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(<a class="primitive" href="https://doc.rust-lang.org/nightly/core/primitive.reference.html">&amp;mut </a>K, <a class="primitive" href="https://doc.rust-lang.org/nightly/core/primitive.reference.html">&amp;mut </a>V),</span></h4></section></summary><div class="docblock"><p>Provides in-place mutable access to an occupied entry before any
potential inserts into the map.</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>hashbrown::HashMap;
<span class="kw">let </span><span class="kw-2">mut </span>map: HashMap&lt;<span class="kw-2">&amp;</span>str, u32&gt; = HashMap::new();
map.raw_entry_mut()
.from_key(<span class="string">&quot;poneyland&quot;</span>)
.and_modify(|_k, v| { <span class="kw-2">*</span>v += <span class="number">1 </span>})
.or_insert(<span class="string">&quot;poneyland&quot;</span>, <span class="number">42</span>);
<span class="macro">assert_eq!</span>(map[<span class="string">&quot;poneyland&quot;</span>], <span class="number">42</span>);
map.raw_entry_mut()
.from_key(<span class="string">&quot;poneyland&quot;</span>)
.and_modify(|_k, v| { <span class="kw-2">*</span>v += <span class="number">1 </span>})
.or_insert(<span class="string">&quot;poneyland&quot;</span>, <span class="number">0</span>);
<span class="macro">assert_eq!</span>(map[<span class="string">&quot;poneyland&quot;</span>], <span class="number">43</span>);</code></pre></div>
</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.and_replace_entry_with" class="method has-srclink"><a class="srclink rightside" href="../../src/hashbrown/map.rs.html#3475-3483">source</a><h4 class="code-header">pub fn <a href="#method.and_replace_entry_with" class="fnname">and_replace_entry_with</a>&lt;F&gt;(self, f: F) -&gt; Self<span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(<a class="primitive" href="https://doc.rust-lang.org/nightly/core/primitive.reference.html">&amp;</a>K, V) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a>&lt;V&gt;,</span></h4></section></summary><div class="docblock"><p>Provides shared access to the key and owned access to the value of
an occupied entry and allows to replace or remove it based on the
value of the returned option.</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>hashbrown::HashMap;
<span class="kw">use </span>hashbrown::hash_map::RawEntryMut;
<span class="kw">let </span><span class="kw-2">mut </span>map: HashMap&lt;<span class="kw-2">&amp;</span>str, u32&gt; = HashMap::new();
<span class="kw">let </span>entry = map
.raw_entry_mut()
.from_key(<span class="string">&quot;poneyland&quot;</span>)
.and_replace_entry_with(|_k, _v| <span class="macro">panic!</span>());
<span class="kw">match </span>entry {
RawEntryMut::Vacant(<span class="kw">_</span>) =&gt; {},
RawEntryMut::Occupied(<span class="kw">_</span>) =&gt; <span class="macro">panic!</span>(),
}
map.insert(<span class="string">&quot;poneyland&quot;</span>, <span class="number">42</span>);
<span class="kw">let </span>entry = map
.raw_entry_mut()
.from_key(<span class="string">&quot;poneyland&quot;</span>)
.and_replace_entry_with(|k, v| {
<span class="macro">assert_eq!</span>(k, <span class="kw-2">&amp;</span><span class="string">&quot;poneyland&quot;</span>);
<span class="macro">assert_eq!</span>(v, <span class="number">42</span>);
<span class="prelude-val">Some</span>(v + <span class="number">1</span>)
});
<span class="kw">match </span>entry {
RawEntryMut::Occupied(e) =&gt; {
<span class="macro">assert_eq!</span>(e.key(), <span class="kw-2">&amp;</span><span class="string">&quot;poneyland&quot;</span>);
<span class="macro">assert_eq!</span>(e.get(), <span class="kw-2">&amp;</span><span class="number">43</span>);
},
RawEntryMut::Vacant(<span class="kw">_</span>) =&gt; <span class="macro">panic!</span>(),
}
<span class="macro">assert_eq!</span>(map[<span class="string">&quot;poneyland&quot;</span>], <span class="number">43</span>);
<span class="kw">let </span>entry = map
.raw_entry_mut()
.from_key(<span class="string">&quot;poneyland&quot;</span>)
.and_replace_entry_with(|_k, _v| <span class="prelude-val">None</span>);
<span class="kw">match </span>entry {
RawEntryMut::Vacant(<span class="kw">_</span>) =&gt; {},
RawEntryMut::Occupied(<span class="kw">_</span>) =&gt; <span class="macro">panic!</span>(),
}
<span class="macro">assert!</span>(!map.contains_key(<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-RawEntryMut%3C%27_%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="impl has-srclink"><a class="srclink rightside" href="../../src/hashbrown/map.rs.html#4037-4044">source</a><a href="#impl-Debug-for-RawEntryMut%3C%27_%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="anchor"></a><h3 class="code-header">impl&lt;K:&nbsp;<a class="trait" href="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html" title="trait core::fmt::Debug">Debug</a>, V:&nbsp;<a class="trait" href="https://doc.rust-lang.org/nightly/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/nightly/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a>&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html" title="trait core::fmt::Debug">Debug</a> for <a class="enum" href="enum.RawEntryMut.html" title="enum hashbrown::hash_map::RawEntryMut">RawEntryMut</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"><a class="srclink rightside" href="../../src/hashbrown/map.rs.html#4038-4043">source</a><a href="#method.fmt" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/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/nightly/core/fmt/struct.Formatter.html" title="struct core::fmt::Formatter">Formatter</a>&lt;'_&gt;) -&gt; <a class="type" href="https://doc.rust-lang.org/nightly/core/fmt/type.Result.html" title="type core::fmt::Result">Result</a></h4></section></summary><div class='docblock'>Formats the value using the given formatter. <a href="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html#tymethod.fmt">Read more</a></div></details></div></details></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-RawEntryMut%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="impl has-srclink"><a href="#impl-RefUnwindSafe-for-RawEntryMut%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="anchor"></a><h3 class="code-header">impl&lt;'a, K, V, S, A&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/core/panic/unwind_safe/trait.RefUnwindSafe.html" title="trait core::panic::unwind_safe::RefUnwindSafe">RefUnwindSafe</a> for <a class="enum" href="enum.RawEntryMut.html" title="enum hashbrown::hash_map::RawEntryMut">RawEntryMut</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/nightly/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/nightly/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/nightly/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/nightly/core/panic/unwind_safe/trait.RefUnwindSafe.html" title="trait core::panic::unwind_safe::RefUnwindSafe">RefUnwindSafe</a>,</span></h3></section><section id="impl-Send-for-RawEntryMut%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="impl has-srclink"><a href="#impl-Send-for-RawEntryMut%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="anchor"></a><h3 class="code-header">impl&lt;'a, K, V, S, A&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> for <a class="enum" href="enum.RawEntryMut.html" title="enum hashbrown::hash_map::RawEntryMut">RawEntryMut</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/nightly/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a>,<br>&nbsp;&nbsp;&nbsp;&nbsp;K: <a class="trait" href="https://doc.rust-lang.org/nightly/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/nightly/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> + <a class="trait" href="https://doc.rust-lang.org/nightly/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/nightly/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a>,</span></h3></section><section id="impl-Sync-for-RawEntryMut%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="impl has-srclink"><a href="#impl-Sync-for-RawEntryMut%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="anchor"></a><h3 class="code-header">impl&lt;'a, K, V, S, A&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a> for <a class="enum" href="enum.RawEntryMut.html" title="enum hashbrown::hash_map::RawEntryMut">RawEntryMut</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/nightly/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a>,<br>&nbsp;&nbsp;&nbsp;&nbsp;K: <a class="trait" href="https://doc.rust-lang.org/nightly/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/nightly/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/nightly/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a>,</span></h3></section><section id="impl-Unpin-for-RawEntryMut%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="impl has-srclink"><a href="#impl-Unpin-for-RawEntryMut%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="anchor"></a><h3 class="code-header">impl&lt;'a, K, V, S, A&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a> for <a class="enum" href="enum.RawEntryMut.html" title="enum hashbrown::hash_map::RawEntryMut">RawEntryMut</a>&lt;'a, K, V, S, A&gt;</h3></section><section id="impl-UnwindSafe-for-RawEntryMut%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="impl has-srclink"><a href="#impl-UnwindSafe-for-RawEntryMut%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="anchor"></a><h3 class="code-header">impl&lt;'a, K, V, S, A&nbsp;=&nbsp;Global&gt; !<a class="trait" href="https://doc.rust-lang.org/nightly/core/panic/unwind_safe/trait.UnwindSafe.html" title="trait core::panic::unwind_safe::UnwindSafe">UnwindSafe</a> for <a class="enum" href="enum.RawEntryMut.html" title="enum hashbrown::hash_map::RawEntryMut">RawEntryMut</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-RawEntryMut%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="impl has-srclink"><a class="srclink rightside" href="https://doc.rust-lang.org/nightly/src/core/any.rs.html#200">source</a><a href="#impl-Any-for-RawEntryMut%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="anchor"></a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/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/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</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"><a class="srclink rightside" href="https://doc.rust-lang.org/nightly/src/core/any.rs.html#201">source</a><a href="#method.type_id" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/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/nightly/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/nightly/core/any/trait.Any.html#tymethod.type_id">Read more</a></div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-Borrow%3CT%3E-for-RawEntryMut%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="impl has-srclink"><a class="srclink rightside" href="https://doc.rust-lang.org/nightly/src/core/borrow.rs.html#211">source</a><a href="#impl-Borrow%3CT%3E-for-RawEntryMut%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="anchor"></a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/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/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</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/nightly/src/core/borrow.rs.html#213">source</a></span><a href="#method.borrow" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/core/borrow/trait.Borrow.html#tymethod.borrow" class="fnname">borrow</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/core/primitive.reference.html">&amp;</a>T</h4></section></summary><div class='docblock'>Immutably borrows from an owned value. <a href="https://doc.rust-lang.org/nightly/core/borrow/trait.Borrow.html#tymethod.borrow">Read more</a></div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-BorrowMut%3CT%3E-for-RawEntryMut%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="impl has-srclink"><a class="srclink rightside" href="https://doc.rust-lang.org/nightly/src/core/borrow.rs.html#220">source</a><a href="#impl-BorrowMut%3CT%3E-for-RawEntryMut%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="anchor"></a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/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/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</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/nightly/src/core/borrow.rs.html#221">source</a></span><a href="#method.borrow_mut" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/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/nightly/core/primitive.reference.html">&amp;mut </a>T</h4></section></summary><div class='docblock'>Mutably borrows from an owned value. <a href="https://doc.rust-lang.org/nightly/core/borrow/trait.BorrowMut.html#tymethod.borrow_mut">Read more</a></div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-From%3CT%3E-for-RawEntryMut%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="impl has-srclink"><a class="srclink rightside" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#733">source</a><a href="#impl-From%3CT%3E-for-RawEntryMut%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="anchor"></a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/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/nightly/src/core/convert/mod.rs.html#736">source</a></span><a href="#method.from" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/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-RawEntryMut%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="impl has-srclink"><a class="srclink rightside" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#717">source</a><a href="#impl-Into%3CU%3E-for-RawEntryMut%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="anchor"></a><h3 class="code-header">impl&lt;T, U&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/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/nightly/core/convert/trait.From.html" title="trait core::convert::From">From</a>&lt;T&gt;,</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/nightly/src/core/convert/mod.rs.html#725">source</a></span><a href="#method.into" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/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/nightly/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-RawEntryMut%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="impl has-srclink"><a class="srclink rightside" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#775">source</a><a href="#impl-TryFrom%3CU%3E-for-RawEntryMut%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="anchor"></a><h3 class="code-header">impl&lt;T, U&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/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/nightly/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a>&lt;T&gt;,</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/nightly/core/convert/trait.TryFrom.html#associatedtype.Error" class="associatedtype">Error</a> = <a class="enum" href="https://doc.rust-lang.org/nightly/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="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/nightly/src/core/convert/mod.rs.html#781">source</a></span><a href="#method.try_from" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/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/nightly/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/nightly/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/nightly/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a>&gt;</h4></section></summary><div class='docblock'>Performs the conversion.</div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-TryInto%3CU%3E-for-RawEntryMut%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="impl has-srclink"><a class="srclink rightside" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#760">source</a><a href="#impl-TryInto%3CU%3E-for-RawEntryMut%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="anchor"></a><h3 class="code-header">impl&lt;T, U&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/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/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a>&lt;T&gt;,</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/nightly/core/convert/trait.TryInto.html#associatedtype.Error" class="associatedtype">Error</a> = &lt;U as <a class="trait" href="https://doc.rust-lang.org/nightly/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/nightly/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="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/nightly/src/core/convert/mod.rs.html#766">source</a></span><a href="#method.try_into" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/core/convert/trait.TryInto.html#tymethod.try_into" class="fnname">try_into</a>(self) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/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/nightly/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/nightly/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a>&gt;</h4></section></summary><div class='docblock'>Performs the conversion.</div></details></div></details></div></section></div></main><div id="rustdoc-vars" data-root-path="../../" data-current-crate="hashbrown" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html>