| <!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="An occupied Entry. It is part of the `Entry` enum."><meta name="keywords" content="rust, rustlang, rust-lang, OccupiedEntry"><title>OccupiedEntry in serde_json::map - Rust</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceSerif4-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../FiraSans-Regular.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../FiraSans-Medium.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceCodePro-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceSerif4-Bold.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceCodePro-Semibold.ttf.woff2"><link rel="stylesheet" href="../../normalize.css"><link rel="stylesheet" href="../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" href="../../ayu.css" disabled><link rel="stylesheet" href="../../dark.css" disabled><link 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href="../../serde_json/index.html"><div class="logo-container"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></div></a><h2 class="location"><a href="#">OccupiedEntry</a></h2><div class="sidebar-elems"><section><h3><a href="#implementations">Methods</a></h3><ul class="block"><li><a href="#method.get">get</a></li><li><a href="#method.get_mut">get_mut</a></li><li><a href="#method.insert">insert</a></li><li><a href="#method.into_mut">into_mut</a></li><li><a href="#method.key">key</a></li><li><a href="#method.remove">remove</a></li></ul><h3><a href="#synthetic-implementations">Auto Trait Implementations</a></h3><ul class="block"><li><a href="#impl-RefUnwindSafe-for-OccupiedEntry%3C%27a%3E">RefUnwindSafe</a></li><li><a href="#impl-Send-for-OccupiedEntry%3C%27a%3E">Send</a></li><li><a href="#impl-Sync-for-OccupiedEntry%3C%27a%3E">Sync</a></li><li><a href="#impl-Unpin-for-OccupiedEntry%3C%27a%3E">Unpin</a></li><li><a href="#impl-UnwindSafe-for-OccupiedEntry%3C%27a%3E">!UnwindSafe</a></li></ul><h3><a href="#blanket-implementations">Blanket Implementations</a></h3><ul class="block"><li><a href="#impl-Any-for-OccupiedEntry%3C%27a%3E">Any</a></li><li><a href="#impl-Borrow%3CT%3E-for-OccupiedEntry%3C%27a%3E">Borrow<T></a></li><li><a href="#impl-BorrowMut%3CT%3E-for-OccupiedEntry%3C%27a%3E">BorrowMut<T></a></li><li><a href="#impl-From%3CT%3E-for-OccupiedEntry%3C%27a%3E">From<T></a></li><li><a href="#impl-Into%3CU%3E-for-OccupiedEntry%3C%27a%3E">Into<U></a></li><li><a href="#impl-TryFrom%3CU%3E-for-OccupiedEntry%3C%27a%3E">TryFrom<U></a></li><li><a href="#impl-TryInto%3CU%3E-for-OccupiedEntry%3C%27a%3E">TryInto<U></a></li></ul></section><h2><a href="index.html">In serde_json::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">serde_json</a>::<wbr><a href="index.html">map</a>::<wbr><a class="struct" href="#">OccupiedEntry</a><button id="copy-path" onclick="copy_path(this)" title="Copy item path to clipboard"><img src="../../clipboard.svg" width="19" height="18" alt="Copy item path"></button></h1><span class="out-of-band"><a class="srclink" href="../../src/serde_json/map.rs.html#513-515">source</a> · <a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class="inner">−</span>]</a></span></div><div class="item-decl"><pre class="rust struct"><code>pub struct OccupiedEntry<'a> { /* private fields */ }</code></pre></div><details class="rustdoc-toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>An occupied Entry. It is part of the <a href="enum.Entry.html"><code>Entry</code></a> enum.</p> |
| </div></details><h2 id="implementations" class="small-section-header">Implementations<a href="#implementations" class="anchor"></a></h2><div id="implementations-list"><details class="rustdoc-toggle implementors-toggle" open><summary><section id="impl-OccupiedEntry%3C%27a%3E" class="impl has-srclink"><a class="srclink rightside" href="../../src/serde_json/map.rs.html#670-823">source</a><a href="#impl-OccupiedEntry%3C%27a%3E" class="anchor"></a><h3 class="code-header">impl<'a> <a class="struct" href="struct.OccupiedEntry.html" title="struct serde_json::map::OccupiedEntry">OccupiedEntry</a><'a></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.key" class="method has-srclink"><a class="srclink rightside" href="../../src/serde_json/map.rs.html#691-693">source</a><h4 class="code-header">pub fn <a href="#method.key" class="fnname">key</a>(&self) -> &String</h4></section></summary><div class="docblock"><p>Gets a reference to the key in the entry.</p> |
| <h5 id="examples"><a href="#examples">Examples</a></h5> |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>serde_json::map::Entry; |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>map = serde_json::Map::new(); |
| map.insert(<span class="string">"serde"</span>.to_owned(), <span class="macro">json!</span>(<span class="number">12</span>)); |
| |
| <span class="kw">match </span>map.entry(<span class="string">"serde"</span>) { |
| Entry::Occupied(occupied) => { |
| <span class="macro">assert_eq!</span>(occupied.key(), <span class="kw-2">&</span><span class="string">"serde"</span>); |
| } |
| Entry::Vacant(<span class="kw">_</span>) => <span class="macro">unimplemented!</span>(), |
| }</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.get" class="method has-srclink"><a class="srclink rightside" href="../../src/serde_json/map.rs.html#715-717">source</a><h4 class="code-header">pub fn <a href="#method.get" class="fnname">get</a>(&self) -> &<a class="enum" href="../enum.Value.html" title="enum serde_json::Value">Value</a></h4></section></summary><div class="docblock"><p>Gets a reference to the value in the entry.</p> |
| <h5 id="examples-1"><a href="#examples-1">Examples</a></h5> |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>serde_json::map::Entry; |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>map = serde_json::Map::new(); |
| map.insert(<span class="string">"serde"</span>.to_owned(), <span class="macro">json!</span>(<span class="number">12</span>)); |
| |
| <span class="kw">match </span>map.entry(<span class="string">"serde"</span>) { |
| Entry::Occupied(occupied) => { |
| <span class="macro">assert_eq!</span>(occupied.get(), <span class="number">12</span>); |
| } |
| Entry::Vacant(<span class="kw">_</span>) => <span class="macro">unimplemented!</span>(), |
| }</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.get_mut" class="method has-srclink"><a class="srclink rightside" href="../../src/serde_json/map.rs.html#741-743">source</a><h4 class="code-header">pub fn <a href="#method.get_mut" class="fnname">get_mut</a>(&mut self) -> &mut <a class="enum" href="../enum.Value.html" title="enum serde_json::Value">Value</a></h4></section></summary><div class="docblock"><p>Gets a mutable reference to the value in the entry.</p> |
| <h5 id="examples-2"><a href="#examples-2">Examples</a></h5> |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>serde_json::map::Entry; |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>map = serde_json::Map::new(); |
| map.insert(<span class="string">"serde"</span>.to_owned(), <span class="macro">json!</span>([<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>])); |
| |
| <span class="kw">match </span>map.entry(<span class="string">"serde"</span>) { |
| Entry::Occupied(<span class="kw-2">mut </span>occupied) => { |
| occupied.get_mut().as_array_mut().unwrap().push(<span class="macro">json!</span>(<span class="number">4</span>)); |
| } |
| Entry::Vacant(<span class="kw">_</span>) => <span class="macro">unimplemented!</span>(), |
| } |
| |
| <span class="macro">assert_eq!</span>(map[<span class="string">"serde"</span>].as_array().unwrap().len(), <span class="number">4</span>);</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.into_mut" class="method has-srclink"><a class="srclink rightside" href="../../src/serde_json/map.rs.html#767-769">source</a><h4 class="code-header">pub fn <a href="#method.into_mut" class="fnname">into_mut</a>(self) -> &'a mut <a class="enum" href="../enum.Value.html" title="enum serde_json::Value">Value</a></h4></section></summary><div class="docblock"><p>Converts the entry into a mutable reference to its value.</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>serde_json::map::Entry; |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>map = serde_json::Map::new(); |
| map.insert(<span class="string">"serde"</span>.to_owned(), <span class="macro">json!</span>([<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>])); |
| |
| <span class="kw">match </span>map.entry(<span class="string">"serde"</span>) { |
| Entry::Occupied(<span class="kw-2">mut </span>occupied) => { |
| occupied.into_mut().as_array_mut().unwrap().push(<span class="macro">json!</span>(<span class="number">4</span>)); |
| } |
| Entry::Vacant(<span class="kw">_</span>) => <span class="macro">unimplemented!</span>(), |
| } |
| |
| <span class="macro">assert_eq!</span>(map[<span class="string">"serde"</span>].as_array().unwrap().len(), <span class="number">4</span>);</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.insert" class="method has-srclink"><a class="srclink rightside" href="../../src/serde_json/map.rs.html#793-795">source</a><h4 class="code-header">pub fn <a href="#method.insert" class="fnname">insert</a>(&mut self, value: <a class="enum" href="../enum.Value.html" title="enum serde_json::Value">Value</a>) -> <a class="enum" href="../enum.Value.html" title="enum serde_json::Value">Value</a></h4></section></summary><div class="docblock"><p>Sets the value of the entry with the <code>OccupiedEntry</code>’s key, and returns |
| the entry’s old value.</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>serde_json::map::Entry; |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>map = serde_json::Map::new(); |
| map.insert(<span class="string">"serde"</span>.to_owned(), <span class="macro">json!</span>(<span class="number">12</span>)); |
| |
| <span class="kw">match </span>map.entry(<span class="string">"serde"</span>) { |
| Entry::Occupied(<span class="kw-2">mut </span>occupied) => { |
| <span class="macro">assert_eq!</span>(occupied.insert(<span class="macro">json!</span>(<span class="number">13</span>)), <span class="number">12</span>); |
| <span class="macro">assert_eq!</span>(occupied.get(), <span class="number">13</span>); |
| } |
| Entry::Vacant(<span class="kw">_</span>) => <span class="macro">unimplemented!</span>(), |
| }</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.remove" class="method has-srclink"><a class="srclink rightside" href="../../src/serde_json/map.rs.html#817-822">source</a><h4 class="code-header">pub fn <a href="#method.remove" class="fnname">remove</a>(self) -> <a class="enum" href="../enum.Value.html" title="enum serde_json::Value">Value</a></h4></section></summary><div class="docblock"><p>Takes the value of the entry out of the map, and returns it.</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>serde_json::map::Entry; |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>map = serde_json::Map::new(); |
| map.insert(<span class="string">"serde"</span>.to_owned(), <span class="macro">json!</span>(<span class="number">12</span>)); |
| |
| <span class="kw">match </span>map.entry(<span class="string">"serde"</span>) { |
| Entry::Occupied(occupied) => { |
| <span class="macro">assert_eq!</span>(occupied.remove(), <span class="number">12</span>); |
| } |
| Entry::Vacant(<span class="kw">_</span>) => <span class="macro">unimplemented!</span>(), |
| }</code></pre></div> |
| </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-OccupiedEntry%3C%27a%3E" class="impl has-srclink"><a href="#impl-RefUnwindSafe-for-OccupiedEntry%3C%27a%3E" class="anchor"></a><h3 class="code-header">impl<'a> RefUnwindSafe for <a class="struct" href="struct.OccupiedEntry.html" title="struct serde_json::map::OccupiedEntry">OccupiedEntry</a><'a></h3></section><section id="impl-Send-for-OccupiedEntry%3C%27a%3E" class="impl has-srclink"><a href="#impl-Send-for-OccupiedEntry%3C%27a%3E" class="anchor"></a><h3 class="code-header">impl<'a> Send for <a class="struct" href="struct.OccupiedEntry.html" title="struct serde_json::map::OccupiedEntry">OccupiedEntry</a><'a></h3></section><section id="impl-Sync-for-OccupiedEntry%3C%27a%3E" class="impl has-srclink"><a href="#impl-Sync-for-OccupiedEntry%3C%27a%3E" class="anchor"></a><h3 class="code-header">impl<'a> Sync for <a class="struct" href="struct.OccupiedEntry.html" title="struct serde_json::map::OccupiedEntry">OccupiedEntry</a><'a></h3></section><section id="impl-Unpin-for-OccupiedEntry%3C%27a%3E" class="impl has-srclink"><a href="#impl-Unpin-for-OccupiedEntry%3C%27a%3E" class="anchor"></a><h3 class="code-header">impl<'a> Unpin for <a class="struct" href="struct.OccupiedEntry.html" title="struct serde_json::map::OccupiedEntry">OccupiedEntry</a><'a></h3></section><section id="impl-UnwindSafe-for-OccupiedEntry%3C%27a%3E" class="impl has-srclink"><a href="#impl-UnwindSafe-for-OccupiedEntry%3C%27a%3E" class="anchor"></a><h3 class="code-header">impl<'a> !UnwindSafe for <a class="struct" href="struct.OccupiedEntry.html" title="struct serde_json::map::OccupiedEntry">OccupiedEntry</a><'a></h3></section></div><h2 id="blanket-implementations" class="small-section-header">Blanket Implementations<a href="#blanket-implementations" class="anchor"></a></h2><div id="blanket-implementations-list"><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-Any-for-OccupiedEntry%3C%27a%3E" class="impl has-srclink"><a href="#impl-Any-for-OccupiedEntry%3C%27a%3E" class="anchor"></a><h3 class="code-header">impl<T> Any for T<span class="where fmt-newline">where<br> 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>(&self) -> 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-OccupiedEntry%3C%27a%3E" class="impl has-srclink"><a href="#impl-Borrow%3CT%3E-for-OccupiedEntry%3C%27a%3E" class="anchor"></a><h3 class="code-header">impl<T> Borrow<T> for T<span class="where fmt-newline">where<br> 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>(&self) -> &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-OccupiedEntry%3C%27a%3E" class="impl has-srclink"><a href="#impl-BorrowMut%3CT%3E-for-OccupiedEntry%3C%27a%3E" class="anchor"></a><h3 class="code-header">impl<T> BorrowMut<T> for T<span class="where fmt-newline">where<br> 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>(&mut self) -> &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-OccupiedEntry%3C%27a%3E" class="impl has-srclink"><a href="#impl-From%3CT%3E-for-OccupiedEntry%3C%27a%3E" class="anchor"></a><h3 class="code-header">impl<T> From<T> 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) -> T</h4></section></summary><div class="docblock"><p>Returns the argument unchanged.</p> |
| </div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-Into%3CU%3E-for-OccupiedEntry%3C%27a%3E" class="impl has-srclink"><a href="#impl-Into%3CU%3E-for-OccupiedEntry%3C%27a%3E" class="anchor"></a><h3 class="code-header">impl<T, U> Into<U> for T<span class="where fmt-newline">where<br> U: From<T>,</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) -> 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]<T> for U</code> chooses to do.</p> |
| </div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-TryFrom%3CU%3E-for-OccupiedEntry%3C%27a%3E" class="impl has-srclink"><a href="#impl-TryFrom%3CU%3E-for-OccupiedEntry%3C%27a%3E" class="anchor"></a><h3 class="code-header">impl<T, U> TryFrom<U> for T<span class="where fmt-newline">where<br> U: Into<T>,</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) -> Result<T, <T as TryFrom<U>>::Error></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-OccupiedEntry%3C%27a%3E" class="impl has-srclink"><a href="#impl-TryInto%3CU%3E-for-OccupiedEntry%3C%27a%3E" class="anchor"></a><h3 class="code-header">impl<T, U> TryInto<U> for T<span class="where fmt-newline">where<br> U: TryFrom<T>,</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> = <U as TryFrom<T>>::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) -> Result<U, <U as TryFrom<T>>::Error></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="serde_json" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |
