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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="API documentation for the Rust `SerializeStruct` trait in crate `serde`."><meta name="keywords" content="rust, rustlang, rust-lang, SerializeStruct"><title>serde::ser::SerializeStruct - Rust</title><link rel="stylesheet" type="text/css" href="../../normalize.css"><link rel="stylesheet" type="text/css" href="../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../../light.css" id="themeStyle"><link rel="stylesheet" type="text/css" href="../../dark.css" disabled ><link rel="stylesheet" type="text/css" href="../../ayu.css" disabled ><script id="default-settings"></script><script src="../../storage.js"></script><noscript><link rel="stylesheet" href="../../noscript.css"></noscript><link rel="icon" type="image/svg+xml" href="../../favicon.svg">
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<link rel="alternate icon" type="image/png" href="../../favicon-32x32.png"><style type="text/css">#crate-search{background-image:url("../../down-arrow.svg");}</style></head><body class="rustdoc trait"><!--[if lte IE 8]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu">☰</div><a href='../../serde/index.html'><div class='logo-container rust-logo'><img src='../../rust-logo.png' alt='logo'></div></a><p class="location">Trait SerializeStruct</p><div class="sidebar-elems"><div class="block items"><a class="sidebar-title" href="#associated-types">Associated Types</a><div class="sidebar-links"><a href="#associatedtype.Error">Error</a><a href="#associatedtype.Ok">Ok</a></div><a class="sidebar-title" href="#required-methods">Required Methods</a><div class="sidebar-links"><a href="#tymethod.end">end</a><a href="#tymethod.serialize_field">serialize_field</a></div><a class="sidebar-title" href="#provided-methods">Provided Methods</a><div class="sidebar-links"><a href="#method.skip_field">skip_field</a></div><a class="sidebar-title" href="#implementors">Implementors</a></div><p class="location"><a href="../index.html">serde</a>::<wbr><a href="index.html">ser</a></p><div id="sidebar-vars" data-name="SerializeStruct" data-ty="trait" data-relpath=""></div><script defer src="sidebar-items.js"></script></div></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!" aria-haspopup="menu"><img src="../../brush.svg" width="18" alt="Pick another theme!"></button><div id="theme-choices" role="menu"></div></div><script src="../../theme.js"></script><nav class="sub"><form class="search-form"><div class="search-container"><div><select id="crate-search"><option value="All crates">All crates</option></select><input class="search-input" name="search" disabled autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"></div><button type="button" class="help-button">?</button>
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<a id="settings-menu" href="../../settings.html"><img src="../../wheel.svg" width="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><h1 class="fqn"><span class="in-band">Trait <a href="../index.html">serde</a>::<wbr><a href="index.html">ser</a>::<wbr><a class="trait" href="">SerializeStruct</a></span><span class="out-of-band"><span id="render-detail"><a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class="inner">−</span>]</a></span><a class="srclink" href="../../src/serde/ser/mod.rs.html#1863-1888" title="goto source code">[src]</a></span></h1><div class="docblock type-decl hidden-by-usual-hider"><pre class="rust trait">pub trait SerializeStruct {
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type <a href="#associatedtype.Ok" class="type">Ok</a>;
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type <a href="#associatedtype.Error" class="type">Error</a>: <a class="trait" href="../../serde/ser/trait.Error.html" title="trait serde::ser::Error">Error</a>;
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fn <a href="#tymethod.serialize_field" class="fnname">serialize_field</a><T: ?<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>>(<br> &mut self, <br> key: &'static <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>, <br> value: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&</a>T<br> ) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../../serde/ser/trait.SerializeStruct.html#associatedtype.Error" title="type serde::ser::SerializeStruct::Error">Error</a>><br> <span class="where">where<br> T: <a class="trait" href="../../serde/trait.Serialize.html" title="trait serde::Serialize">Serialize</a></span>;
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<div class="item-spacer"></div> fn <a href="#tymethod.end" class="fnname">end</a>(self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><Self::<a class="type" href="../../serde/ser/trait.SerializeStruct.html#associatedtype.Ok" title="type serde::ser::SerializeStruct::Ok">Ok</a>, Self::<a class="type" href="../../serde/ser/trait.SerializeStruct.html#associatedtype.Error" title="type serde::ser::SerializeStruct::Error">Error</a>>;
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fn <a href="#method.skip_field" class="fnname">skip_field</a>(&mut self, key: &'static <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../../serde/ser/trait.SerializeStruct.html#associatedtype.Error" title="type serde::ser::SerializeStruct::Error">Error</a>> { ... }
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}</pre></div><div class="docblock"><p>Returned from <code>Serializer::serialize_struct</code>.</p>
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<h1 id="example-use" class="section-header"><a href="#example-use">Example use</a></h1>
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<div class='information'><div class='tooltip edition' data-edition="2018">ⓘ</div></div><div class="example-wrap"><pre class="rust rust-example-rendered edition">
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<span class="kw">use</span> <span class="ident">serde</span>::<span class="ident">ser</span>::{<span class="ident">Serialize</span>, <span class="ident">SerializeStruct</span>, <span class="ident">Serializer</span>};
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<span class="kw">struct</span> <span class="ident">Rgb</span> {
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<span class="ident">r</span>: <span class="ident">u8</span>,
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<span class="ident">g</span>: <span class="ident">u8</span>,
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<span class="ident">b</span>: <span class="ident">u8</span>,
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}
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<span class="kw">impl</span> <span class="ident">Serialize</span> <span class="kw">for</span> <span class="ident">Rgb</span> {
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<span class="kw">fn</span> <span class="ident">serialize</span><span class="op"><</span><span class="ident">S</span><span class="op">></span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">serializer</span>: <span class="ident">S</span>) <span class="op">-</span><span class="op">></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">S</span>::<span class="prelude-val">Ok</span>, <span class="ident">S</span>::<span class="ident">Error</span><span class="op">></span>
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<span class="kw">where</span>
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<span class="ident">S</span>: <span class="ident">Serializer</span>,
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{
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<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">rgb</span> <span class="op">=</span> <span class="ident">serializer</span>.<span class="ident">serialize_struct</span>(<span class="string">"Rgb"</span>, <span class="number">3</span>)<span class="question-mark">?</span>;
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<span class="ident">rgb</span>.<span class="ident">serialize_field</span>(<span class="string">"r"</span>, <span class="kw-2">&</span><span class="self">self</span>.<span class="ident">r</span>)<span class="question-mark">?</span>;
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<span class="ident">rgb</span>.<span class="ident">serialize_field</span>(<span class="string">"g"</span>, <span class="kw-2">&</span><span class="self">self</span>.<span class="ident">g</span>)<span class="question-mark">?</span>;
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<span class="ident">rgb</span>.<span class="ident">serialize_field</span>(<span class="string">"b"</span>, <span class="kw-2">&</span><span class="self">self</span>.<span class="ident">b</span>)<span class="question-mark">?</span>;
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<span class="ident">rgb</span>.<span class="ident">end</span>()
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}
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}</pre></div>
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<h1 id="example-implementation" class="section-header"><a href="#example-implementation">Example implementation</a></h1>
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<p>The <a href="https://serde.rs/data-format.html">example data format</a> presented on the website demonstrates an
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implementation of <code>SerializeStruct</code> for a basic JSON data format.</p>
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</div><h2 id="associated-types" class="small-section-header">Associated Types<a href="#associated-types" class="anchor"></a></h2><div class="methods"><h3 id="associatedtype.Ok" class="method"><code>type <a href="#associatedtype.Ok" class="type">Ok</a></code><a class="srclink" href="../../src/serde/ser/mod.rs.html#1865" title="goto source code">[src]</a></h3><div class="docblock"><p>Must match the <code>Ok</code> type of our <code>Serializer</code>.</p>
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</div><h3 id="associatedtype.Error" class="method"><code>type <a href="#associatedtype.Error" class="type">Error</a>: <a class="trait" href="../../serde/ser/trait.Error.html" title="trait serde::ser::Error">Error</a></code><a class="srclink" href="../../src/serde/ser/mod.rs.html#1868" title="goto source code">[src]</a></h3><div class="docblock"><p>Must match the <code>Error</code> type of our <code>Serializer</code>.</p>
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</div></div><span class="loading-content">Loading content...</span><h2 id="required-methods" class="small-section-header">Required methods<a href="#required-methods" class="anchor"></a></h2><div class="methods"><h3 id="tymethod.serialize_field" class="method"><code>fn <a href="#tymethod.serialize_field" class="fnname">serialize_field</a><T: ?<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>>(<br> &mut self, <br> key: &'static <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>, <br> value: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&</a>T<br>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../../serde/ser/trait.SerializeStruct.html#associatedtype.Error" title="type serde::ser::SerializeStruct::Error">Error</a>> <span class="where fmt-newline">where<br> T: <a class="trait" href="../../serde/trait.Serialize.html" title="trait serde::Serialize">Serialize</a>, </span></code><a class="srclink" href="../../src/serde/ser/mod.rs.html#1871-1877" title="goto source code">[src]</a></h3><div class="docblock"><p>Serialize a struct field.</p>
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</div><h3 id="tymethod.end" class="method"><code>fn <a href="#tymethod.end" class="fnname">end</a>(self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><Self::<a class="type" href="../../serde/ser/trait.SerializeStruct.html#associatedtype.Ok" title="type serde::ser::SerializeStruct::Ok">Ok</a>, Self::<a class="type" href="../../serde/ser/trait.SerializeStruct.html#associatedtype.Error" title="type serde::ser::SerializeStruct::Error">Error</a>></code><a class="srclink" href="../../src/serde/ser/mod.rs.html#1887" title="goto source code">[src]</a></h3><div class="docblock"><p>Finish serializing a struct.</p>
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</div></div><span class="loading-content">Loading content...</span><h2 id="provided-methods" class="small-section-header">Provided methods<a href="#provided-methods" class="anchor"></a></h2><div class="methods"><h3 id="method.skip_field" class="method"><code>fn <a href="#method.skip_field" class="fnname">skip_field</a>(&mut self, key: &'static <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../../serde/ser/trait.SerializeStruct.html#associatedtype.Error" title="type serde::ser::SerializeStruct::Error">Error</a>></code><a class="srclink" href="../../src/serde/ser/mod.rs.html#1881-1884" title="goto source code">[src]</a></h3><div class="docblock"><p>Indicate that a struct field has been skipped.</p>
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</div></div><span class="loading-content">Loading content...</span><h2 id="implementors" class="small-section-header">Implementors<a href="#implementors" class="anchor"></a></h2><div class="item-list" id="implementors-list"><h3 id="impl-SerializeStruct" class="impl"><code class="in-band">impl<Ok, Error> SerializeStruct for <a class="struct" href="../../serde/ser/struct.Impossible.html" title="struct serde::ser::Impossible">Impossible</a><Ok, Error> <span class="where fmt-newline">where<br> Error: <a class="trait" href="../../serde/ser/trait.Error.html" title="trait serde::ser::Error">Error</a>, </span></code><a href="#impl-SerializeStruct" class="anchor"></a><a class="srclink" href="../../src/serde/ser/impossible.rs.html#176-195" title="goto source code">[src]</a></h3><div class="impl-items"><h4 id="associatedtype.Ok-1" class="type"><code>type <a href="#associatedtype.Ok-1" class="type">Ok</a> = Ok</code></h4><h4 id="associatedtype.Error-1" class="type"><code>type <a href="#associatedtype.Error-1" class="type">Error</a> = Error</code></h4><h4 id="method.serialize_field" class="method hidden"><code>fn <a href="#method.serialize_field" class="fnname">serialize_field</a><T: ?<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>>(<br> &mut self, <br> key: &'static <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>, <br> value: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&</a>T<br>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Error> <span class="where fmt-newline">where<br> T: <a class="trait" href="../../serde/trait.Serialize.html" title="trait serde::Serialize">Serialize</a>, </span></code><a class="srclink" href="../../src/serde/ser/impossible.rs.html#183-190" title="goto source code">[src]</a></h4><h4 id="method.end" class="method hidden"><code>fn <a href="#method.end" class="fnname">end</a>(self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><Ok, Error></code><a class="srclink" href="../../src/serde/ser/impossible.rs.html#192-194" title="goto source code">[src]</a></h4></div></div><span class="loading-content">Loading content...</span><script type="text/javascript" src="../../implementors/serde/ser/trait.SerializeStruct.js" async></script></section><section id="search" class="content hidden"></section><section class="footer"></section><div id="rustdoc-vars" data-root-path="../../" data-current-crate="serde"></div>
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