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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="The error returned by `try_insert` when the key already exists."><meta name="keywords" content="rust, rustlang, rust-lang, OccupiedError"><title>OccupiedError 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="#">OccupiedError</a></h2><div class="sidebar-elems"><section><h3><a href="#fields">Fields</a></h3><ul class="block"><li><a href="#structfield.entry">entry</a></li><li><a href="#structfield.value">value</a></li></ul><h3><a href="#trait-implementations">Trait Implementations</a></h3><ul class="block"><li><a href="#impl-Debug-for-OccupiedError%3C%27_%2C%20K%2C%20V%2C%20S%2C%20A%3E">Debug</a></li><li><a href="#impl-Display-for-OccupiedError%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E">Display</a></li></ul><h3><a href="#synthetic-implementations">Auto Trait Implementations</a></h3><ul class="block"><li><a href="#impl-RefUnwindSafe-for-OccupiedError%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E">RefUnwindSafe</a></li><li><a href="#impl-Send-for-OccupiedError%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E">Send</a></li><li><a href="#impl-Sync-for-OccupiedError%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E">Sync</a></li><li><a href="#impl-Unpin-for-OccupiedError%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E">Unpin</a></li><li><a href="#impl-UnwindSafe-for-OccupiedError%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-OccupiedError%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E">Any</a></li><li><a href="#impl-Borrow%3CT%3E-for-OccupiedError%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-OccupiedError%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-OccupiedError%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-OccupiedError%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E">Into&lt;U&gt;</a></li><li><a href="#impl-ToString-for-OccupiedError%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E">ToString</a></li><li><a href="#impl-TryFrom%3CU%3E-for-OccupiedError%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-OccupiedError%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">Struct <a href="../index.html">hashbrown</a>::<wbr><a href="index.html">hash_map</a>::<wbr><a class="struct" href="#">OccupiedError</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#4539-4544">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 struct"><code>pub struct OccupiedError&lt;'a, K, V, S, A:&nbsp;Allocator + Clone&nbsp;=&nbsp;Global&gt; {
pub entry: <a class="struct" href="struct.OccupiedEntry.html" title="struct hashbrown::hash_map::OccupiedEntry">OccupiedEntry</a>&lt;'a, K, V, S, A&gt;,
pub value: V,
}</code></pre></div><details class="rustdoc-toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>The error returned by <a href="struct.HashMap.html#method.try_insert"><code>try_insert</code></a> when the key already exists.</p>
<p>Contains the occupied entry, and the value that was not inserted.</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>hashbrown::hash_map::{HashMap, OccupiedError};
<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">10</span>), (<span class="string">&quot;b&quot;</span>, <span class="number">20</span>)].into();
<span class="comment">// try_insert method returns mutable reference to the value if keys are vacant,
// but if the map did have key present, nothing is updated, and the provided
// value is returned inside `Err(_)` variant
</span><span class="kw">match </span>map.try_insert(<span class="string">&quot;a&quot;</span>, <span class="number">100</span>) {
<span class="prelude-val">Err</span>(OccupiedError { <span class="kw-2">mut </span>entry, value }) =&gt; {
<span class="macro">assert_eq!</span>(entry.key(), <span class="kw-2">&amp;</span><span class="string">&quot;a&quot;</span>);
<span class="macro">assert_eq!</span>(value, <span class="number">100</span>);
<span class="macro">assert_eq!</span>(entry.insert(<span class="number">100</span>), <span class="number">10</span>)
}
<span class="kw">_ </span>=&gt; <span class="macro">unreachable!</span>(),
}
<span class="macro">assert_eq!</span>(map[<span class="kw-2">&amp;</span><span class="string">&quot;a&quot;</span>], <span class="number">100</span>);</code></pre></div>
</div></details><h2 id="fields" class="fields small-section-header">Fields<a href="#fields" class="anchor"></a></h2><span id="structfield.entry" class="structfield small-section-header"><a href="#structfield.entry" class="anchor field"></a><code>entry: <a class="struct" href="struct.OccupiedEntry.html" title="struct hashbrown::hash_map::OccupiedEntry">OccupiedEntry</a>&lt;'a, K, V, S, A&gt;</code></span><div class="docblock"><p>The entry in the map that was already occupied.</p>
</div><span id="structfield.value" class="structfield small-section-header"><a href="#structfield.value" class="anchor field"></a><code>value: V</code></span><div class="docblock"><p>The value which was not inserted, because the entry was already occupied.</p>
</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-OccupiedError%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#4546-4554">source</a><a href="#impl-Debug-for-OccupiedError%3C%27_%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="anchor"></a><h3 class="code-header">impl&lt;K:&nbsp;Debug, V:&nbsp;Debug, S, A:&nbsp;Allocator + Clone&gt; Debug for <a class="struct" href="struct.OccupiedError.html" title="struct hashbrown::hash_map::OccupiedError">OccupiedError</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#4547-4553">source</a><a href="#method.fmt" class="anchor"></a><h4 class="code-header">fn <a class="fnname">fmt</a>(&amp;self, f: &amp;mut Formatter&lt;'_&gt;) -&gt; Result</h4></section></summary><div class='docblock'>Formats the value using the given formatter. <a>Read more</a></div></details></div></details><details class="rustdoc-toggle implementors-toggle" open><summary><section id="impl-Display-for-OccupiedError%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#4556-4568">source</a><a href="#impl-Display-for-OccupiedError%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="anchor"></a><h3 class="code-header">impl&lt;'a, K:&nbsp;Debug, V:&nbsp;Debug, S, A:&nbsp;Allocator + Clone&gt; Display for <a class="struct" href="struct.OccupiedError.html" title="struct hashbrown::hash_map::OccupiedError">OccupiedError</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.fmt-1" class="method trait-impl has-srclink"><a class="srclink rightside" href="../../src/hashbrown/map.rs.html#4559-4567">source</a><a href="#method.fmt-1" class="anchor"></a><h4 class="code-header">fn <a class="fnname">fmt</a>(&amp;self, f: &amp;mut Formatter&lt;'_&gt;) -&gt; Result</h4></section></summary><div class='docblock'>Formats the value using the given formatter. <a>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-OccupiedError%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="impl has-srclink"><a href="#impl-RefUnwindSafe-for-OccupiedError%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; RefUnwindSafe for <a class="struct" href="struct.OccupiedError.html" title="struct hashbrown::hash_map::OccupiedError">OccupiedError</a>&lt;'a, K, V, S, A&gt;<span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;A: RefUnwindSafe,<br>&nbsp;&nbsp;&nbsp;&nbsp;K: RefUnwindSafe,<br>&nbsp;&nbsp;&nbsp;&nbsp;S: RefUnwindSafe,<br>&nbsp;&nbsp;&nbsp;&nbsp;V: RefUnwindSafe,</span></h3></section><section id="impl-Send-for-OccupiedError%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="impl has-srclink"><a href="#impl-Send-for-OccupiedError%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; Send for <a class="struct" href="struct.OccupiedError.html" title="struct hashbrown::hash_map::OccupiedError">OccupiedError</a>&lt;'a, K, V, S, A&gt;<span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;A: Send,<br>&nbsp;&nbsp;&nbsp;&nbsp;K: Send,<br>&nbsp;&nbsp;&nbsp;&nbsp;S: Send,<br>&nbsp;&nbsp;&nbsp;&nbsp;V: Send,</span></h3></section><section id="impl-Sync-for-OccupiedError%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="impl has-srclink"><a href="#impl-Sync-for-OccupiedError%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; Sync for <a class="struct" href="struct.OccupiedError.html" title="struct hashbrown::hash_map::OccupiedError">OccupiedError</a>&lt;'a, K, V, S, A&gt;<span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;A: Sync,<br>&nbsp;&nbsp;&nbsp;&nbsp;K: Sync,<br>&nbsp;&nbsp;&nbsp;&nbsp;S: Sync,<br>&nbsp;&nbsp;&nbsp;&nbsp;V: Sync,</span></h3></section><section id="impl-Unpin-for-OccupiedError%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="impl has-srclink"><a href="#impl-Unpin-for-OccupiedError%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; Unpin for <a class="struct" href="struct.OccupiedError.html" title="struct hashbrown::hash_map::OccupiedError">OccupiedError</a>&lt;'a, K, V, S, A&gt;<span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;K: Unpin,<br>&nbsp;&nbsp;&nbsp;&nbsp;V: Unpin,</span></h3></section><section id="impl-UnwindSafe-for-OccupiedError%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="impl has-srclink"><a href="#impl-UnwindSafe-for-OccupiedError%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; !UnwindSafe for <a class="struct" href="struct.OccupiedError.html" title="struct hashbrown::hash_map::OccupiedError">OccupiedError</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-OccupiedError%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="impl has-srclink"><a href="#impl-Any-for-OccupiedError%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="anchor"></a><h3 class="code-header">impl&lt;T&gt; Any for T<span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;T: 'static + ?Sized,</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 href="#method.type_id" class="anchor"></a><h4 class="code-header">fn <a class="fnname">type_id</a>(&amp;self) -&gt; TypeId</h4></section></summary><div class='docblock'>Gets the <code>TypeId</code> of <code>self</code>. <a>Read more</a></div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-Borrow%3CT%3E-for-OccupiedError%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="impl has-srclink"><a href="#impl-Borrow%3CT%3E-for-OccupiedError%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="anchor"></a><h3 class="code-header">impl&lt;T&gt; Borrow&lt;T&gt; for T<span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;T: ?Sized,</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="since rightside" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/91522" title="Tracking issue for const_borrow">unstable</a></span><a href="#method.borrow" class="anchor"></a><h4 class="code-header">fn <a class="fnname">borrow</a>(&amp;self) -&gt; &amp;T</h4></section></summary><div class='docblock'>Immutably borrows from an owned value. <a>Read more</a></div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-BorrowMut%3CT%3E-for-OccupiedError%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="impl has-srclink"><a href="#impl-BorrowMut%3CT%3E-for-OccupiedError%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="anchor"></a><h3 class="code-header">impl&lt;T&gt; BorrowMut&lt;T&gt; for T<span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;T: ?Sized,</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="since rightside" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/91522" title="Tracking issue for const_borrow">unstable</a></span><a href="#method.borrow_mut" class="anchor"></a><h4 class="code-header">fn <a class="fnname">borrow_mut</a>(&amp;mut self) -&gt; &amp;mut T</h4></section></summary><div class='docblock'>Mutably borrows from an owned value. <a>Read more</a></div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-From%3CT%3E-for-OccupiedError%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="impl has-srclink"><a href="#impl-From%3CT%3E-for-OccupiedError%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="anchor"></a><h3 class="code-header">impl&lt;T&gt; From&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="since rightside" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/88674" title="Tracking issue for const_convert">unstable</a></span><a href="#method.from" class="anchor"></a><h4 class="code-header">fn <a 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-OccupiedError%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="impl has-srclink"><a href="#impl-Into%3CU%3E-for-OccupiedError%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="anchor"></a><h3 class="code-header">impl&lt;T, U&gt; Into&lt;U&gt; for T<span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;U: From&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="since rightside" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/88674" title="Tracking issue for const_convert">unstable</a></span><a href="#method.into" class="anchor"></a><h4 class="code-header">fn <a 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>[From]&lt;T&gt; for U</code> chooses to do.</p>
</div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-ToString-for-OccupiedError%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="impl has-srclink"><a href="#impl-ToString-for-OccupiedError%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="anchor"></a><h3 class="code-header">impl&lt;T&gt; ToString for T<span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;T: Display + ?Sized,</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.to_string" class="method trait-impl has-srclink"><a href="#method.to_string" class="anchor"></a><h4 class="code-header">default fn <a class="fnname">to_string</a>(&amp;self) -&gt; String</h4></section></summary><div class='docblock'>Converts the given value to a <code>String</code>. <a>Read more</a></div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-TryFrom%3CU%3E-for-OccupiedError%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="impl has-srclink"><a href="#impl-TryFrom%3CU%3E-for-OccupiedError%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="anchor"></a><h3 class="code-header">impl&lt;T, U&gt; TryFrom&lt;U&gt; for T<span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;U: Into&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 class="associatedtype">Error</a> = Infallible</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="since rightside" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/88674" title="Tracking issue for const_convert">unstable</a></span><a href="#method.try_from" class="anchor"></a><h4 class="code-header">fn <a class="fnname">try_from</a>(value: U) -&gt; Result&lt;T, &lt;T as TryFrom&lt;U&gt;&gt;::Error&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-OccupiedError%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="impl has-srclink"><a href="#impl-TryInto%3CU%3E-for-OccupiedError%3C%27a%2C%20K%2C%20V%2C%20S%2C%20A%3E" class="anchor"></a><h3 class="code-header">impl&lt;T, U&gt; TryInto&lt;U&gt; for T<span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;U: TryFrom&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 class="associatedtype">Error</a> = &lt;U as TryFrom&lt;T&gt;&gt;::Error</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="since rightside" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/88674" title="Tracking issue for const_convert">unstable</a></span><a href="#method.try_into" class="anchor"></a><h4 class="code-header">fn <a class="fnname">try_into</a>(self) -&gt; Result&lt;U, &lt;U as TryFrom&lt;T&gt;&gt;::Error&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>