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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."><title>OccupiedEntry in hashbrown::hash_map - Rust</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-46f98efaafac5295.ttf.woff2,FiraSans-Regular-018c141bf0843ffd.woff2,FiraSans-Medium-8f9a781e4970d388.woff2,SourceCodePro-Regular-562dcc5011b6de7d.ttf.woff2,SourceCodePro-Semibold-d899c5a5c4aeb14a.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../../static.files/normalize-76eba96aa4d2e634.css"><link rel="stylesheet" href="../../static.files/rustdoc-b0742ba02757f159.css"><meta name="rustdoc-vars" data-root-path="../../" data-static-root-path="../../static.files/" data-current-crate="hashbrown" data-themes="" data-resource-suffix="" data-rustdoc-version="1.83.0 (90b35a623 2024-11-26)" data-channel="1.83.0" data-search-js="search-f0d225181b97f9a4.js" data-settings-js="settings-805db61a62df4bd2.js" ><script src="../../static.files/storage-1d39b6787ed640ff.js"></script><script defer src="sidebar-items.js"></script><script defer src="../../static.files/main-f070b9041d14864c.js"></script><noscript><link rel="stylesheet" href="../../static.files/noscript-0111fcff984fae8f.css"></noscript><link rel="alternate icon" type="image/png" href="../../static.files/favicon-32x32-422f7d1d52889060.png"><link rel="icon" type="image/svg+xml" href="../../static.files/favicon-2c020d218678b618.svg"></head><body class="rustdoc struct"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="mobile-topbar"><button class="sidebar-menu-toggle" title="show sidebar"></button></nav><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../../hashbrown/index.html">hashbrown</a><span class="version">0.12.3</span></h2></div><div class="sidebar-elems"><section id="rustdoc-toc"><h2 class="location"><a href="#">Occupied<wbr>Entry</a></h2><h3><a href="#">Sections</a></h3><ul class="block top-toc"><li><a href="#examples" title="Examples">Examples</a></li></ul><h3><a href="#implementations">Methods</a></h3><ul class="block method"><li><a href="#method.get" title="get">get</a></li><li><a href="#method.get_mut" title="get_mut">get_mut</a></li><li><a href="#method.insert" title="insert">insert</a></li><li><a href="#method.into_mut" title="into_mut">into_mut</a></li><li><a href="#method.key" title="key">key</a></li><li><a href="#method.remove" title="remove">remove</a></li><li><a href="#method.remove_entry" title="remove_entry">remove_entry</a></li><li><a href="#method.replace_entry" title="replace_entry">replace_entry</a></li><li><a href="#method.replace_entry_with" title="replace_entry_with">replace_entry_with</a></li><li><a href="#method.replace_key" title="replace_key">replace_key</a></li></ul><h3><a href="#trait-implementations">Trait Implementations</a></h3><ul class="block trait-implementation"><li><a href="#impl-Debug-for-OccupiedEntry%3C'_,+K,+V,+S,+A%3E" title="Debug">Debug</a></li><li><a href="#impl-Send-for-OccupiedEntry%3C'_,+K,+V,+S,+A%3E" title="Send">Send</a></li><li><a href="#impl-Sync-for-OccupiedEntry%3C'_,+K,+V,+S,+A%3E" title="Sync">Sync</a></li></ul><h3><a href="#synthetic-implementations">Auto Trait Implementations</a></h3><ul class="block synthetic-implementation"><li><a href="#impl-UnwindSafe-for-OccupiedEntry%3C'a,+K,+V,+S,+A%3E" title="!UnwindSafe">!UnwindSafe</a></li><li><a href="#impl-Freeze-for-OccupiedEntry%3C'a,+K,+V,+S,+A%3E" title="Freeze">Freeze</a></li><li><a href="#impl-RefUnwindSafe-for-OccupiedEntry%3C'a,+K,+V,+S,+A%3E" title="RefUnwindSafe">RefUnwindSafe</a></li><li><a href="#impl-Unpin-for-OccupiedEntry%3C'a,+K,+V,+S,+A%3E" title="Unpin">Unpin</a></li></ul><h3><a href=
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It is part of the <a href="enum.Entry.html"><code>Entry</code></a> enum.</p>
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<h2 id="examples"><a class="doc-anchor" href="#examples">§</a>Examples</h2>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>hashbrown::hash_map::{Entry, HashMap, OccupiedEntry};
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<span class="kw">let </span><span class="kw-2">mut </span>map = HashMap::new();
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map.extend([(<span class="string">"a"</span>, <span class="number">10</span>), (<span class="string">"b"</span>, <span class="number">20</span>), (<span class="string">"c"</span>, <span class="number">30</span>)]);
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<span class="kw">let </span>_entry_o: OccupiedEntry<<span class="kw">_</span>, <span class="kw">_</span>, <span class="kw">_</span>> = map.entry(<span class="string">"a"</span>).insert(<span class="number">100</span>);
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<span class="macro">assert_eq!</span>(map.len(), <span class="number">3</span>);
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<span class="comment">// Existing key (insert and update)
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</span><span class="kw">match </span>map.entry(<span class="string">"a"</span>) {
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Entry::Vacant(<span class="kw">_</span>) => <span class="macro">unreachable!</span>(),
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Entry::Occupied(<span class="kw-2">mut </span>view) => {
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<span class="macro">assert_eq!</span>(view.get(), <span class="kw-2">&</span><span class="number">100</span>);
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<span class="kw">let </span>v = view.get_mut();
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<span class="kw-2">*</span>v <span class="kw-2">*</span>= <span class="number">10</span>;
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<span class="macro">assert_eq!</span>(view.insert(<span class="number">1111</span>), <span class="number">1000</span>);
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}
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}
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<span class="macro">assert_eq!</span>(map[<span class="kw-2">&</span><span class="string">"a"</span>], <span class="number">1111</span>);
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<span class="macro">assert_eq!</span>(map.len(), <span class="number">3</span>);
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<span class="comment">// Existing key (take)
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</span><span class="kw">match </span>map.entry(<span class="string">"c"</span>) {
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Entry::Vacant(<span class="kw">_</span>) => <span class="macro">unreachable!</span>(),
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Entry::Occupied(view) => {
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<span class="macro">assert_eq!</span>(view.remove_entry(), (<span class="string">"c"</span>, <span class="number">30</span>));
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}
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}
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<span class="macro">assert_eq!</span>(map.get(<span class="kw-2">&</span><span class="string">"c"</span>), <span class="prelude-val">None</span>);
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<span class="macro">assert_eq!</span>(map.len(), <span class="number">2</span>);</code></pre></div>
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</div></details><h2 id="implementations" class="section-header">Implementations<a href="#implementations" class="anchor">§</a></h2><div id="implementations-list"><details class="toggle implementors-toggle" open><summary><section id="impl-OccupiedEntry%3C'a,+K,+V,+S,+A%3E" class="impl"><a class="src rightside" href="../../src/hashbrown/map.rs.html#5151-5506">source</a><a href="#impl-OccupiedEntry%3C'a,+K,+V,+S,+A%3E" class="anchor">§</a><h3 class="code-header">impl<'a, K, V, S, A: Allocator + <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a>> <a class="struct" href="struct.OccupiedEntry.html" title="struct hashbrown::hash_map::OccupiedEntry">OccupiedEntry</a><'a, K, V, S, A></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.key" class="method"><a class="src rightside" href="../../src/hashbrown/map.rs.html#5168-5170">source</a><h4 class="code-header">pub fn <a href="#method.key" class="fn">key</a>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.reference.html">&K</a></h4></section></summary><div class="docblock"><p>Gets a reference to the key in the entry.</p>
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<h5 id="examples-1"><a class="doc-anchor" href="#examples-1">§</a>Examples</h5>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>hashbrown::hash_map::{Entry, HashMap};
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<span class="kw">let </span><span class="kw-2">mut </span>map: HashMap<<span class="kw-2">&</span>str, u32> = HashMap::new();
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map.entry(<span class="string">"poneyland"</span>).or_insert(<span class="number">12</span>);
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<span class="kw">match </span>map.entry(<span class="string">"poneyland"</span>) {
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Entry::Vacant(<span class="kw">_</span>) => <span class="macro">panic!</span>(),
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Entry::Occupied(entry) => <span class="macro">assert_eq!</span>(entry.key(), <span class="kw-2">&</span><span class="string">"poneyland"</span>),
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}</code></pre></div>
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</div></details><details class="toggle method-toggle" open><summary><section id="method.remove_entry" class="method"><a class="src rightside" href="../../src/hashbrown/map.rs.html#5198-5200">source</a><h4 class="code-header">pub fn <a href="#method.remove_entry" class="fn">remove_entry</a>(self) -> <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.tuple.html">(K, V)</a></h4></section></summary><div class="docblock"><p>Take the ownership of the key and value from the map.
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Keeps the allocated memory for reuse.</p>
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<h5 id="examples-2"><a class="doc-anchor" href="#examples-2">§</a>Examples</h5>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>hashbrown::HashMap;
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<span class="kw">use </span>hashbrown::hash_map::Entry;
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<span class="kw">let </span><span class="kw-2">mut </span>map: HashMap<<span class="kw-2">&</span>str, u32> = HashMap::new();
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<span class="comment">// The map is empty
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</span><span class="macro">assert!</span>(map.is_empty() && map.capacity() == <span class="number">0</span>);
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map.entry(<span class="string">"poneyland"</span>).or_insert(<span class="number">12</span>);
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<span class="kw">let </span>capacity_before_remove = map.capacity();
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<span class="kw">if let </span>Entry::Occupied(o) = map.entry(<span class="string">"poneyland"</span>) {
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<span class="comment">// We delete the entry from the map.
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</span><span class="macro">assert_eq!</span>(o.remove_entry(), (<span class="string">"poneyland"</span>, <span class="number">12</span>));
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}
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<span class="macro">assert_eq!</span>(map.contains_key(<span class="string">"poneyland"</span>), <span class="bool-val">false</span>);
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<span class="comment">// Now map hold none elements but capacity is equal to the old one
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</span><span class="macro">assert!</span>(map.len() == <span class="number">0 </span>&& map.capacity() == capacity_before_remove);</code></pre></div>
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</div></details><details class="toggle method-toggle" open><summary><section id="method.get" class="method"><a class="src rightside" href="../../src/hashbrown/map.rs.html#5219-5221">source</a><h4 class="code-header">pub fn <a href="#method.get" class="fn">get</a>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.reference.html">&V</a></h4></section></summary><div class="docblock"><p>Gets a reference to the value in the entry.</p>
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<h5 id="examples-3"><a class="doc-anchor" href="#examples-3">§</a>Examples</h5>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>hashbrown::HashMap;
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<span class="kw">use </span>hashbrown::hash_map::Entry;
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<span class="kw">let </span><span class="kw-2">mut </span>map: HashMap<<span class="kw-2">&</span>str, u32> = HashMap::new();
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map.entry(<span class="string">"poneyland"</span>).or_insert(<span class="number">12</span>);
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<span class="kw">match </span>map.entry(<span class="string">"poneyland"</span>) {
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Entry::Vacant(<span class="kw">_</span>) => <span class="macro">panic!</span>(),
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Entry::Occupied(entry) => <span class="macro">assert_eq!</span>(entry.get(), <span class="kw-2">&</span><span class="number">12</span>),
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}</code></pre></div>
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</div></details><details class="toggle method-toggle" open><summary><section id="method.get_mut" class="method"><a class="src rightside" href="../../src/hashbrown/map.rs.html#5251-5253">source</a><h4 class="code-header">pub fn <a href="#method.get_mut" class="fn">get_mut</a>(&mut self) -> <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.reference.html">&mut V</a></h4></section></summary><div class="docblock"><p>Gets a mutable reference to the value in the entry.</p>
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<p>If you need a reference to the <code>OccupiedEntry</code> which may outlive the
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destruction of the <code>Entry</code> value, see <a href="#method.into_mut"><code>into_mut</code></a>.</p>
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<h5 id="examples-4"><a class="doc-anchor" href="#examples-4">§</a>Examples</h5>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>hashbrown::HashMap;
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<span class="kw">use </span>hashbrown::hash_map::Entry;
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<span class="kw">let </span><span class="kw-2">mut </span>map: HashMap<<span class="kw-2">&</span>str, u32> = HashMap::new();
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map.entry(<span class="string">"poneyland"</span>).or_insert(<span class="number">12</span>);
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<span class="macro">assert_eq!</span>(map[<span class="string">"poneyland"</span>], <span class="number">12</span>);
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<span class="kw">if let </span>Entry::Occupied(<span class="kw-2">mut </span>o) = map.entry(<span class="string">"poneyland"</span>) {
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<span class="kw-2">*</span>o.get_mut() += <span class="number">10</span>;
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<span class="macro">assert_eq!</span>(<span class="kw-2">*</span>o.get(), <span class="number">22</span>);
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<span class="comment">// We can use the same Entry multiple times.
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</span><span class="kw-2">*</span>o.get_mut() += <span class="number">2</span>;
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}
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<span class="macro">assert_eq!</span>(map[<span class="string">"poneyland"</span>], <span class="number">24</span>);</code></pre></div>
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</div></details><details class="toggle method-toggle" open><summary><section id="method.into_mut" class="method"><a class="src rightside" href="../../src/hashbrown/map.rs.html#5282-5284">source</a><h4 class="code-header">pub fn <a href="#method.into_mut" class="fn">into_mut</a>(self) -> <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.reference.html">&'a mut V</a></h4></section></summary><div class="docblock"><p>Converts the OccupiedEntry into a mutable reference to the value in the entry
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with a lifetime bound to the map itself.</p>
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<p>If you need multiple references to the <code>OccupiedEntry</code>, see <a href="#method.get_mut"><code>get_mut</code></a>.</p>
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<h5 id="examples-5"><a class="doc-anchor" href="#examples-5">§</a>Examples</h5>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>hashbrown::hash_map::{Entry, HashMap};
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<span class="kw">let </span><span class="kw-2">mut </span>map: HashMap<<span class="kw-2">&</span>str, u32> = HashMap::new();
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map.entry(<span class="string">"poneyland"</span>).or_insert(<span class="number">12</span>);
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<span class="macro">assert_eq!</span>(map[<span class="string">"poneyland"</span>], <span class="number">12</span>);
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<span class="kw">let </span>value: <span class="kw-2">&mut </span>u32;
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<span class="kw">match </span>map.entry(<span class="string">"poneyland"</span>) {
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Entry::Occupied(entry) => value = entry.into_mut(),
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Entry::Vacant(<span class="kw">_</span>) => <span class="macro">panic!</span>(),
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}
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<span class="kw-2">*</span>value += <span class="number">10</span>;
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<span class="macro">assert_eq!</span>(map[<span class="string">"poneyland"</span>], <span class="number">22</span>);</code></pre></div>
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</div></details><details class="toggle method-toggle" open><summary><section id="method.insert" class="method"><a class="src rightside" href="../../src/hashbrown/map.rs.html#5304-5306">source</a><h4 class="code-header">pub fn <a href="#method.insert" class="fn">insert</a>(&mut self, value: V) -> V</h4></section></summary><div class="docblock"><p>Sets the value of the entry, and returns the entry’s old value.</p>
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<h5 id="examples-6"><a class="doc-anchor" href="#examples-6">§</a>Examples</h5>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>hashbrown::HashMap;
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<span class="kw">use </span>hashbrown::hash_map::Entry;
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<span class="kw">let </span><span class="kw-2">mut </span>map: HashMap<<span class="kw-2">&</span>str, u32> = HashMap::new();
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map.entry(<span class="string">"poneyland"</span>).or_insert(<span class="number">12</span>);
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<span class="kw">if let </span>Entry::Occupied(<span class="kw-2">mut </span>o) = map.entry(<span class="string">"poneyland"</span>) {
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<span class="macro">assert_eq!</span>(o.insert(<span class="number">15</span>), <span class="number">12</span>);
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}
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<span class="macro">assert_eq!</span>(map[<span class="string">"poneyland"</span>], <span class="number">15</span>);</code></pre></div>
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</div></details><details class="toggle method-toggle" open><summary><section id="method.remove" class="method"><a class="src rightside" href="../../src/hashbrown/map.rs.html#5333-5335">source</a><h4 class="code-header">pub fn <a href="#method.remove" class="fn">remove</a>(self) -> V</h4></section></summary><div class="docblock"><p>Takes the value out of the entry, and returns it.
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Keeps the allocated memory for reuse.</p>
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<h5 id="examples-7"><a class="doc-anchor" href="#examples-7">§</a>Examples</h5>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>hashbrown::HashMap;
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<span class="kw">use </span>hashbrown::hash_map::Entry;
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<span class="kw">let </span><span class="kw-2">mut </span>map: HashMap<<span class="kw-2">&</span>str, u32> = HashMap::new();
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<span class="comment">// The map is empty
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</span><span class="macro">assert!</span>(map.is_empty() && map.capacity() == <span class="number">0</span>);
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map.entry(<span class="string">"poneyland"</span>).or_insert(<span class="number">12</span>);
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<span class="kw">let </span>capacity_before_remove = map.capacity();
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<span class="kw">if let </span>Entry::Occupied(o) = map.entry(<span class="string">"poneyland"</span>) {
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|
|
<span class="macro">assert_eq!</span>(o.remove(), <span class="number">12</span>);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
<span class="macro">assert_eq!</span>(map.contains_key(<span class="string">"poneyland"</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>(map.len() == <span class="number">0 </span>&& map.capacity() == capacity_before_remove);</code></pre></div>
|
|||
|
|
</div></details><details class="toggle method-toggle" open><summary><section id="method.replace_entry" class="method"><a class="src rightside" href="../../src/hashbrown/map.rs.html#5369-5376">source</a><h4 class="code-header">pub fn <a href="#method.replace_entry" class="fn">replace_entry</a>(self, value: V) -> <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/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 class="doc-anchor" href="#panics">§</a>Panics</h5>
|
|||
|
|
<p>Will panic if this OccupiedEntry was created through <a href="enum.Entry.html#method.insert" title="method hashbrown::hash_map::Entry::insert"><code>Entry::insert</code></a>.</p>
|
|||
|
|
<h5 id="examples-8"><a class="doc-anchor" href="#examples-8">§</a>Examples</h5>
|
|||
|
|
<div class="example-wrap"><pre class="rust rust-example-rendered"><code> <span class="kw">use </span>hashbrown::hash_map::{Entry, HashMap};
|
|||
|
|
<span class="kw">use </span>std::rc::Rc;
|
|||
|
|
|
|||
|
|
<span class="kw">let </span><span class="kw-2">mut </span>map: HashMap<Rc<String>, u32> = HashMap::new();
|
|||
|
|
<span class="kw">let </span>key_one = Rc::new(<span class="string">"Stringthing"</span>.to_string());
|
|||
|
|
<span class="kw">let </span>key_two = Rc::new(<span class="string">"Stringthing"</span>.to_string());
|
|||
|
|
|
|||
|
|
map.insert(key_one.clone(), <span class="number">15</span>);
|
|||
|
|
<span class="macro">assert!</span>(Rc::strong_count(<span class="kw-2">&</span>key_one) == <span class="number">2 </span>&& Rc::strong_count(<span class="kw-2">&</span>key_two) == <span class="number">1</span>);
|
|||
|
|
|
|||
|
|
<span class="kw">match </span>map.entry(key_two.clone()) {
|
|||
|
|
Entry::Occupied(entry) => {
|
|||
|
|
<span class="kw">let </span>(old_key, old_value): (Rc<String>, u32) = entry.replace_entry(<span class="number">16</span>);
|
|||
|
|
<span class="macro">assert!</span>(Rc::ptr_eq(<span class="kw-2">&</span>key_one, <span class="kw-2">&</span>old_key) && old_value == <span class="number">15</span>);
|
|||
|
|
}
|
|||
|
|
Entry::Vacant(<span class="kw">_</span>) => <span class="macro">panic!</span>(),
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
<span class="macro">assert!</span>(Rc::strong_count(<span class="kw-2">&</span>key_one) == <span class="number">1 </span>&& Rc::strong_count(<span class="kw-2">&</span>key_two) == <span class="number">2</span>);
|
|||
|
|
<span class="macro">assert_eq!</span>(map[<span class="kw-2">&</span><span class="string">"Stringthing"</span>.to_owned()], <span class="number">16</span>);</code></pre></div>
|
|||
|
|
</div></details><details class="toggle method-toggle" open><summary><section id="method.replace_key" class="method"><a class="src rightside" href="../../src/hashbrown/map.rs.html#5423-5426">source</a><h4 class="code-header">pub fn <a href="#method.replace_key" class="fn">replace_key</a>(self) -> 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 class="doc-anchor" href="#panics-1">§</a>Panics</h5>
|
|||
|
|
<p>Will panic if this OccupiedEntry was created through <a href="enum.Entry.html#method.insert" title="method hashbrown::hash_map::Entry::insert"><code>Entry::insert</code></a>.</p>
|
|||
|
|
<h5 id="examples-9"><a class="doc-anchor" href="#examples-9">§</a>Examples</h5>
|
|||
|
|
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>hashbrown::hash_map::{Entry, HashMap};
|
|||
|
|
<span class="kw">use </span>std::rc::Rc;
|
|||
|
|
|
|||
|
|
<span class="kw">let </span><span class="kw-2">mut </span>map: HashMap<Rc<String>, usize> = HashMap::with_capacity(<span class="number">6</span>);
|
|||
|
|
<span class="kw">let </span><span class="kw-2">mut </span>keys_one: Vec<Rc<String>> = Vec::with_capacity(<span class="number">6</span>);
|
|||
|
|
<span class="kw">let </span><span class="kw-2">mut </span>keys_two: Vec<Rc<String>> = Vec::with_capacity(<span class="number">6</span>);
|
|||
|
|
|
|||
|
|
<span class="kw">for </span>(value, key) <span class="kw">in </span>[<span class="string">"a"</span>, <span class="string">"b"</span>, <span class="string">"c"</span>, <span class="string">"d"</span>, <span class="string">"e"</span>, <span class="string">"f"</span>].into_iter().enumerate() {
|
|||
|
|
<span class="kw">let </span>rc_key = Rc::new(key.to_owned());
|
|||
|
|
keys_one.push(rc_key.clone());
|
|||
|
|
map.insert(rc_key.clone(), value);
|
|||
|
|
keys_two.push(Rc::new(key.to_owned()));
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
<span class="macro">assert!</span>(
|
|||
|
|
keys_one.iter().all(|key| Rc::strong_count(key) == <span class="number">2</span>)
|
|||
|
|
&& keys_two.iter().all(|key| Rc::strong_count(key) == <span class="number">1</span>)
|
|||
|
|
);
|
|||
|
|
|
|||
|
|
reclaim_memory(<span class="kw-2">&mut </span>map, <span class="kw-2">&</span>keys_two);
|
|||
|
|
|
|||
|
|
<span class="macro">assert!</span>(
|
|||
|
|
keys_one.iter().all(|key| Rc::strong_count(key) == <span class="number">1</span>)
|
|||
|
|
&& keys_two.iter().all(|key| Rc::strong_count(key) == <span class="number">2</span>)
|
|||
|
|
);
|
|||
|
|
|
|||
|
|
<span class="kw">fn </span>reclaim_memory(map: <span class="kw-2">&mut </span>HashMap<Rc<String>, usize>, keys: <span class="kw-2">&</span>[Rc<String>]) {
|
|||
|
|
<span class="kw">for </span>key <span class="kw">in </span>keys {
|
|||
|
|
<span class="kw">if let </span>Entry::Occupied(entry) = map.entry(key.clone()) {
|
|||
|
|
<span class="comment">// Replaces the entry's key with our version of it in `keys`.
|
|||
|
|
</span>entry.replace_key();
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}</code></pre></div>
|
|||
|
|
</div></details><details class="toggle method-toggle" open><summary><section id="method.replace_entry_with" class="method"><a class="src rightside" href="../../src/hashbrown/map.rs.html#5477-5505">source</a><h4 class="code-header">pub fn <a href="#method.replace_entry_with" class="fn">replace_entry_with</a><F>(self, f: F) -> <a class="enum" href="enum.Entry.html" title="enum hashbrown::hash_map::Entry">Entry</a><'a, K, V, S, A><div class="where">where
|
|||
|
|
F: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(<a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.reference.html">&K</a>, V) -> <a class="enum" href="https://doc.rust-lang.org/1.83.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><V>,</div></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 class="doc-anchor" href="#examples-10">§</a>Examples</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::Entry;
|
|||
|
|
|
|||
|
|
<span class="kw">let </span><span class="kw-2">mut </span>map: HashMap<<span class="kw-2">&</span>str, u32> = HashMap::new();
|
|||
|
|
map.insert(<span class="string">"poneyland"</span>, <span class="number">42</span>);
|
|||
|
|
|
|||
|
|
<span class="kw">let </span>entry = <span class="kw">match </span>map.entry(<span class="string">"poneyland"</span>) {
|
|||
|
|
Entry::Occupied(e) => {
|
|||
|
|
e.replace_entry_with(|k, v| {
|
|||
|
|
<span class="macro">assert_eq!</span>(k, <span class="kw-2">&</span><span class="string">"poneyland"</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>)
|
|||
|
|
})
|
|||
|
|
}
|
|||
|
|
Entry::Vacant(<span class="kw">_</span>) => <span class="macro">panic!</span>(),
|
|||
|
|
};
|
|||
|
|
|
|||
|
|
<span class="kw">match </span>entry {
|
|||
|
|
Entry::Occupied(e) => {
|
|||
|
|
<span class="macro">assert_eq!</span>(e.key(), <span class="kw-2">&</span><span class="string">"poneyland"</span>);
|
|||
|
|
<span class="macro">assert_eq!</span>(e.get(), <span class="kw-2">&</span><span class="number">43</span>);
|
|||
|
|
}
|
|||
|
|
Entry::Vacant(<span class="kw">_</span>) => <span class="macro">panic!</span>(),
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
<span class="macro">assert_eq!</span>(map[<span class="string">"poneyland"</span>], <span class="number">43</span>);
|
|||
|
|
|
|||
|
|
<span class="kw">let </span>entry = <span class="kw">match </span>map.entry(<span class="string">"poneyland"</span>) {
|
|||
|
|
Entry::Occupied(e) => e.replace_entry_with(|_k, _v| <span class="prelude-val">None</span>),
|
|||
|
|
Entry::Vacant(<span class="kw">_</span>) => <span class="macro">panic!</span>(),
|
|||
|
|
};
|
|||
|
|
|
|||
|
|
<span class="kw">match </span>entry {
|
|||
|
|
Entry::Vacant(e) => {
|
|||
|
|
<span class="macro">assert_eq!</span>(e.key(), <span class="kw-2">&</span><span class="string">"poneyland"</span>);
|
|||
|
|
}
|
|||
|
|
Entry::Occupied(<span class="kw">_</span>) => <span class="macro">panic!</span>(),
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
<span class="macro">assert!</span>(!map.contains_key(<span class="string">"poneyland"</span>));</code></pre></div>
|
|||
|
|
</div></details></div></details></div><h2 id="trait-implementations" class="section-header">Trait Implementations<a href="#trait-implementations" class="anchor">§</a></h2><div id="trait-implementations-list"><details class="toggle implementors-toggle" open><summary><section id="impl-Debug-for-OccupiedEntry%3C'_,+K,+V,+S,+A%3E" class="impl"><a class="src rightside" href="../../src/hashbrown/map.rs.html#4218-4225">source</a><a href="#impl-Debug-for-OccupiedEntry%3C'_,+K,+V,+S,+A%3E" class="anchor">§</a><h3 class="code-header">impl<K: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/fmt/trait.Debug.html" title="trait core::fmt::Debug">Debug</a>, V: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/fmt/trait.Debug.html" title="trait core::fmt::Debug">Debug</a>, S, A: Allocator + <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a>> <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/fmt/trait.Debug.html" title="trait core::fmt::Debug">Debug</a> for <a class="struct" href="struct.OccupiedEntry.html" title="struct hashbrown::hash_map::OccupiedEntry">OccupiedEntry</a><'_, K, V, S, A></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.fmt" class="method trait-impl"><a class="src rightside" href="../../src/hashbrown/map.rs.html#4219-4224">source</a><a href="#method.fmt" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.83.0/core/fmt/trait.Debug.html#tymethod.fmt" class="fn">fmt</a>(&self, f: &mut <a class="struct" href="https://doc.rust-lang.org/1.83.0/core/fmt/struct.Formatter.html" title="struct core::fmt::Formatter">Formatter</a><'_>) -> <a class="type" href="https://doc.rust-lang.org/1.83.0/core/fmt/type.Result.html" title="type core::fmt::Result">Result</a></h4></section></summary><div class='docblock'>Formats the value using the given formatter. <a href="https://doc.rust-lang.org/1.83.0/core/fmt/trait.Debug.html#tymethod.fmt">Read more</a></div></details></div></details><section id="impl-Send-for-OccupiedEntry%3C'_,+K,+V,+S,+A%3E" class="impl"><a class="src rightside" href="../../src/hashbrown/map.rs.html#4201-4208">source</a><a href="#impl-Send-for-OccupiedEntry%3C'_,+K,+V,+S,+A%3E" class="anchor">§</a><h3 class="code-header">impl<K, V, S, A> <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> for <a class="struct" href="struct.OccupiedEntry.html" title="struct hashbrown::hash_map::OccupiedEntry">OccupiedEntry</a><'_, K, V, S, A><div class="where">where
|
|||
|
|
K: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a>,
|
|||
|
|
V: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a>,
|
|||
|
|
S: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a>,
|
|||
|
|
A: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> + Allocator + <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a>,</div></h3></section><section id="impl-Sync-for-OccupiedEntry%3C'_,+K,+V,+S,+A%3E" class="impl"><a class="src rightside" href="../../src/hashbrown/map.rs.html#4209-4216">source</a><a href="#impl-Sync-for-OccupiedEntry%3C'_,+K,+V,+S,+A%3E" class="anchor">§</a><h3 class="code-header">impl<K, V, S, A> <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a> for <a class="struct" href="struct.OccupiedEntry.html" title="struct hashbrown::hash_map::OccupiedEntry">OccupiedEntry</a><'_, K, V, S, A><div class="where">where
|
|||
|
|
K: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a>,
|
|||
|
|
V: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a>,
|
|||
|
|
S: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a>,
|
|||
|
|
A: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a> + Allocator + <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a>,</div></h3></section></div><h2 id="synthetic-implementations" class="section-header">Auto Trait Implementations<a href="#synthetic-implementations" class="anchor">§</a></h2><div id="synthetic-implementations-list"><section id="impl-Freeze-for-OccupiedEntry%3C'a,+K,+V,+S,+A%3E" class="impl"><a href="#impl-Freeze-for-OccupiedEntry%3C'a,+K,+V,+S,+A%3E" class="anchor">§</a><h3 class="code-header">impl<'a, K, V, S, A> <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/marker/trait.Freeze.html" title="trait core::marker::Freeze">Freeze</a> for <a class="struct" href="struct.OccupiedEntry.html" title="struct hashbrown::hash_map::OccupiedEntry">OccupiedEntry</a><'a, K, V, S, A><div class="where">where
|
|||
|
|
K: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/marker/trait.Freeze.html" title="trait core::marker::Freeze">Freeze</a>,</div></h3></section><section id="impl-RefUnwindSafe-for-OccupiedEntry%3C'a,+K,+V,+S,+A%3E" class="impl"><a href="#impl-RefUnwindSafe-for-OccupiedEntry%3C'a,+K,+V,+S,+A%3E" class="anchor">§</a><h3 class="code-header">impl<'a, K, V, S, A> <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/panic/unwind_safe/trait.RefUnwindSafe.html" title="trait core::panic::unwind_safe::RefUnwindSafe">RefUnwindSafe</a> for <a class="struct" href="struct.OccupiedEntry.html" title="struct hashbrown::hash_map::OccupiedEntry">OccupiedEntry</a><'a, K, V, S, A><div class="where">where
|
|||
|
|
K: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/panic/unwind_safe/trait.RefUnwindSafe.html" title="trait core::panic::unwind_safe::RefUnwindSafe">RefUnwindSafe</a>,
|
|||
|
|
S: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/panic/unwind_safe/trait.RefUnwindSafe.html" title="trait core::panic::unwind_safe::RefUnwindSafe">RefUnwindSafe</a>,
|
|||
|
|
V: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/panic/unwind_safe/trait.RefUnwindSafe.html" title="trait core::panic::unwind_safe::RefUnwindSafe">RefUnwindSafe</a>,
|
|||
|
|
A: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/panic/unwind_safe/trait.RefUnwindSafe.html" title="trait core::panic::unwind_safe::RefUnwindSafe">RefUnwindSafe</a>,</div></h3></section><section id="impl-Unpin-for-OccupiedEntry%3C'a,+K,+V,+S,+A%3E" class="impl"><a href="#impl-Unpin-for-OccupiedEntry%3C'a,+K,+V,+S,+A%3E" class="anchor">§</a><h3 class="code-header">impl<'a, K, V, S, A> <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a> for <a class="struct" href="struct.OccupiedEntry.html" title="struct hashbrown::hash_map::OccupiedEntry">OccupiedEntry</a><'a, K, V, S, A><div class="where">where
|
|||
|
|
K: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a>,</div></h3></section><section id="impl-UnwindSafe-for-OccupiedEntry%3C'a,+K,+V,+S,+A%3E" class="impl"><a href="#impl-UnwindSafe-for-OccupiedEntry%3C'a,+K,+V,+S,+A%3E" class="anchor">§</a><h3 class="code-header">impl<'a, K, V, S, A = Global> !<a class="trait" href="https://doc.rust-lang.org/1.83.0/core/panic/unwind_safe/trait.UnwindSafe.html" title="trait core::panic::unwind_safe::UnwindSafe">UnwindSafe</a> for <a class="struct" href="struct.OccupiedEntry.html" title="struct hashbrown::hash_map::OccupiedEntry">OccupiedEntry</a><'a, K, V, S, A></h3></section></div><h2 id="blanket-implementations" class="section-header">Blanket Implementations<a href="#blanket-implementations" class="anchor">§</a></h2><div id="blanket-implementations-list"><details class="toggle implementors-toggle"><summary><section id="impl-Any-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/any.rs.html#138">source</a><a href="#impl-Any-for-T" class="anchor">§</a><h3 class="code-header">impl<T> <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/any/trait.Any.html" title="trait core::any::Any">Any</a> for T<div class="where">where
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T: 'static + ?<a class="trait" href="https://doc.rust-lang.org/1.83.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.type_id" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/any.rs.html#139">source</a><a href="#method.type_id" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.83.0/core/any/trait.Any.html#tymethod.type_id" class="fn">type_id</a>(&self) -> <a class="struct" href="https://doc.rust-lang.org/1.83.0/core/any/struct.TypeId.html" title="struct core::any::TypeId">TypeId</a></h4></section></summary><div class='docblock'>Gets the <code>TypeId</code> of <code>self</code>. <a href="https://doc.rust-lang.org/1.83.0/core/any/trait.Any.html#tymethod.type_id">Read more</a></div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-Borrow%3CT%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/borrow.rs.html#209">source</a><a href="#impl-Borrow%3CT%3E-for-T" class="anchor">§</a><h3 class="code-header">impl<T> <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/borrow/trait.Borrow.html" title="trait core::borrow::Borrow">Borrow</a><T> for T<div class="where">where
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T: ?<a class="trait" href="https://doc.rust-lang.org/1.83.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.borrow" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/borrow.rs.html#211">source</a><a href="#method.borrow" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.83.0/core/borrow/trait.Borrow.html#tymethod.borrow" class="fn">borrow</a>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.reference.html">&T</a></h4></section></summary><div class='docblock'>Immutably borrows from an owned value. <a href="https://doc.rust-lang.org/1.83.0/core/borrow/trait.Borrow.html#tymethod.borrow">Read more</a></div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-BorrowMut%3CT%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/borrow.rs.html#217">source</a><a href="#impl-BorrowMut%3CT%3E-for-T" class="anchor">§</a><h3 class="code-header">impl<T> <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/borrow/trait.BorrowMut.html" title="trait core::borrow::BorrowMut">BorrowMut</a><T> for T<div class="where">where
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T: ?<a class="trait" href="https://doc.rust-lang.org/1.83.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.borrow_mut" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/borrow.rs.html#218">source</a><a href="#method.borrow_mut" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.83.0/core/borrow/trait.BorrowMut.html#tymethod.borrow_mut" class="fn">borrow_mut</a>(&mut self) -> <a class="primitive" href="https://doc.rust-lang.org/1.83.0/core/primitive.reference.html">&mut T</a></h4></section></summary><div class='docblock'>Mutably borrows from an owned value. <a href="https://doc.rust-lang.org/1.83.0/core/borrow/trait.BorrowMut.html#tymethod.borrow_mut">Read more</a></div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-From%3CT%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/convert/mod.rs.html#765">source</a><a href="#impl-From%3CT%3E-for-T" class="anchor">§</a><h3 class="code-header">impl<T> <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/convert/trait.From.html" title="trait core::convert::From">From</a><T> for T</h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.from" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/convert/mod.rs.html#768">source</a><a href="#method.from" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.83.0/core/convert/trait.From.html#tymethod.from" class="fn">from</a>(t: T) -> T</h4></section></summary><div class="docblock"><p>Returns the argument unchanged.</p>
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</div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-Into%3CU%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/convert/mod.rs.html#748-750">source</a><a href="#impl-Into%3CU%3E-for-T" class="anchor">§</a><h3 class="code-header">impl<T, U> <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a><U> for T<div class="where">where
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U: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/convert/trait.From.html" title="trait core::convert::From">From</a><T>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.into" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/convert/mod.rs.html#758">source</a><a href="#method.into" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.83.0/core/convert/trait.Into.html#tymethod.into" class="fn">into</a>(self) -> U</h4></section></summary><div class="docblock"><p>Calls <code>U::from(self)</code>.</p>
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<p>That is, this conversion is whatever the implementation of
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<code><a href="https://doc.rust-lang.org/1.83.0/core/convert/trait.From.html" title="trait core::convert::From">From</a><T> for U</code> chooses to do.</p>
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</div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-TryFrom%3CU%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/convert/mod.rs.html#805-807">source</a><a href="#impl-TryFrom%3CU%3E-for-T" class="anchor">§</a><h3 class="code-header">impl<T, U> <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><U> for T<div class="where">where
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U: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a><T>,</div></h3></section></summary><div class="impl-items"><details class="toggle" open><summary><section id="associatedtype.Error-1" class="associatedtype trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/convert/mod.rs.html#809">source</a><a href="#associatedtype.Error-1" class="anchor">§</a><h4 class="code-header">type <a href="https://doc.rust-lang.org/1.83.0/core/convert/trait.TryFrom.html#associatedtype.Error" class="associatedtype">Error</a> = <a class="enum" href="https://doc.rust-lang.org/1.83.0/core/convert/enum.Infallible.html" title="enum core::convert::Infallible">Infallible</a></h4></section></summary><div class='docblock'>The type returned in the event of a conversion error.</div></details><details class="toggle method-toggle" open><summary><section id="method.try_from" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/convert/mod.rs.html#812">source</a><a href="#method.try_from" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.83.0/core/convert/trait.TryFrom.html#tymethod.try_from" class="fn">try_from</a>(value: U) -> <a class="enum" href="https://doc.rust-lang.org/1.83.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a><T, <T as <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><U>>::<a class="associatedtype" href="https://doc.rust-lang.org/1.83.0/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a>></h4></section></summary><div class='docblock'>Performs the conversion.</div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-TryInto%3CU%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/convert/mod.rs.html#790-792">source</a><a href="#impl-TryInto%3CU%3E-for-T" class="anchor">§</a><h3 class="code-header">impl<T, U> <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/convert/trait.TryInto.html" title="trait core::convert::TryInto">TryInto</a><U> for T<div class="where">where
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U: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><T>,</div></h3></section></summary><div class="impl-items"><details class="toggle" open><summary><section id="associatedtype.Error" class="associatedtype trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/convert/mod.rs.html#794">source</a><a href="#associatedtype.Error" class="anchor">§</a><h4 class="code-header">type <a href="https://doc.rust-lang.org/1.83.0/core/convert/trait.TryInto.html#associatedtype.Error" class="associatedtype">Error</a> = <U as <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><T>>::<a class="associatedtype" href="https://doc.rust-lang.org/1.83.0/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a></h4></section></summary><div class='docblock'>The type returned in the event of a conversion error.</div></details><details class="toggle method-toggle" open><summary><section id="method.try_into" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/convert/mod.rs.html#797">source</a><a href="#method.try_into" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.83.0/core/convert/trait.TryInto.html#tymethod.try_into" class="fn">try_into</a>(self) -> <a class="enum" href="https://doc.rust-lang.org/1.83.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a><U, <U as <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><T>>::<a class="associatedtype" href="https://doc.rust-lang.org/1.83.0/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a>></h4></section></summary><div class='docblock'>Performs the conversion.</div></details></div></details></div></section></div></main></body></html>
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