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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="This trait abstracts away serializing the JSON control characters, which allows the user to optionally pretty print the JSON output."><title>Formatter in serde_json::ser - Rust</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-6b053e98.ttf.woff2,FiraSans-Italic-81dc35de.woff2,FiraSans-Regular-0fe48ade.woff2,FiraSans-MediumItalic-ccf7e434.woff2,FiraSans-Medium-e1aa3f0a.woff2,SourceCodePro-Regular-8badfe75.ttf.woff2,SourceCodePro-Semibold-aa29a496.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2"href="../../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../../static.files/normalize-9960930a.css"><link rel="stylesheet" href="../../static.files/rustdoc-ca0dd0c4.css"><meta name="rustdoc-vars" data-root-path="../../" data-static-root-path="../../static.files/" data-current-crate="serde_json" data-themes="" data-resource-suffix="" data-rustdoc-version="1.93.1 (01f6ddf75 2026-02-11) (Arch Linux rust 1:1.93.1-1)" data-channel="1.93.1" data-search-js="search-9e2438ea.js" data-stringdex-js="stringdex-a3946164.js" data-settings-js="settings-c38705f0.js" ><script src="../../static.files/storage-e2aeef58.js"></script><script defer src="sidebar-items.js"></script><script defer src="../../static.files/main-a410ff4d.js"></script><noscript><link rel="stylesheet" href="../../static.files/noscript-263c88ec.css"></noscript><link rel="alternate icon" type="image/png" href="../../static.files/favicon-32x32-eab170b8.png"><link rel="icon" type="image/svg+xml" href="../../static.files/favicon-044be391.svg"></head><body class="rustdoc trait"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><rustdoc-topbar><h2><a href="#">Formatter</a></h2></rustdoc-topbar><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../../serde_json/index.html">serde_<wbr>json</a><span class="version">1.0.149</span></h2></div><div class="sidebar-elems"><section id="rustdoc-toc"><h2 class="location"><a href="#">Formatter</a></h2><h3><a href="#provided-methods">Provided Methods</a></h3><ul class="block"><li><a href="#method.begin_array" title="begin_array">begin_array</a></li><li><a href="#method.begin_array_value" title="begin_array_value">begin_array_value</a></li><li><a href="#method.begin_object" title="begin_object">begin_object</a></li><li><a href="#method.begin_object_key" title="begin_object_key">begin_object_key</a></li><li><a href="#method.begin_object_value" title="begin_object_value">begin_object_value</a></li><li><a href="#method.begin_string" title="begin_string">begin_string</a></li><li><a href="#method.end_array" title="end_array">end_array</a></li><li><a href="#method.end_array_value" title="end_array_value">end_array_value</a></li><li><a href="#method.end_object" title="end_object">end_object</a></li><li><a href="#method.end_object_key" title="end_object_key">end_object_key</a></li><li><a href="#method.end_object_value" title="end_object_value">end_object_value</a></li><li><a href="#method.end_string" title="end_string">end_string</a></li><li><a href="#method.write_bool" title="write_bool">write_bool</a></li><li><a href="#method.write_byte_array" title="write_byte_array">write_byte_array</a></li><li><a href="#method.write_char_escape" title="write_char_escape">write_char_escape</a></li><li><a href="#method.write_f32" title="write_f32">write_f32</a></li><li><a href="#method.write_f64" title="write_f64">write_f64</a></li><li><a href="#method.write_i8" title="write_i8">write_i8</a></li><li><a href="#method.write_i16" title="write_i16">write_i16</a></li><li><a href="#method.write_i32" title="write_i32">write_i32</a></li><li><a href="#method.write_i64" title="write_i64">write_i64</a></li><li><a href="#method.write_i128" title="write_i128">write_i128</a></li><li><a href="#method.write_null" title="write_null">write_null</a></li><li><a href="#method.write_number_str" title="write_number_str">write_number_str</a></li><li><a href="#method.write_raw_fragment" title="write_raw_fragment">write_raw_fragment</a></li><li><a href="#method.write_string_fragment" title="write_string_fragment">write_string_fragment</a></li><li><a href="#method.write_u8" title="write_u8">write_u8</a></li><li><a href="#method.write_u16" title="write_u16">write_u16</a></li><li><a href="#method.write_u32" title="write_u32">write_u32</a></li><li><a href="#method.write_u64" title="write_u64">write_u64</a></li><li><a href="#method.write_u128" title="write_u128">write_u128</a></li></ul><h3><a href="#dyn-compatibility">Dyn Compatibility</a></h3><h3><a href="#implementors">Implementors</a></h3></section><div id="rustdoc-modnav"><h2><a href="index.html">In serde_<wbr>json::<wbr>ser</a></h2></div></div></nav><div class="sidebar-resizer" title="Drag to resize sidebar"></div><main><div class="width-limiter"><section id="main-content" class="content"><div class="main-heading"><div class="rustdoc-breadcrumbs"><a href="../index.html">serde_json</a>::<wbr><a href="index.html">ser</a></div><h1>Trait <span class="trait">Formatter</span>&nbsp;<button id="copy-path" title="Copy item path to clipboard">Copy item path</button></h1><rustdoc-toolbar></rustdoc-toolbar><span class="sub-heading"><a class="src" href="../../src/serde_json/ser.rs.html#1541-1935">Source</a> </span></div><pre class="rust item-decl"><code>pub trait Formatter {
<details class="toggle type-contents-toggle"><summary class="hideme"><span>Show 31 methods</span></summary> // Provided methods
fn <a href="#method.write_null" class="fn">write_null</a>&lt;W&gt;(&amp;mut self, writer: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.reference.html">&amp;mut W</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/1.93.1/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>&gt;
<span class="where">where W: ?<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/1.93.1/std/io/trait.Write.html" title="trait std::io::Write">Write</a></span> { ... }
<span class="item-spacer"></span> fn <a href="#method.write_bool" class="fn">write_bool</a>&lt;W&gt;(&amp;mut self, writer: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.reference.html">&amp;mut W</a>, value: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.bool.html">bool</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/1.93.1/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>&gt;
<span class="where">where W: ?<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/1.93.1/std/io/trait.Write.html" title="trait std::io::Write">Write</a></span> { ... }
<span class="item-spacer"></span> fn <a href="#method.write_i8" class="fn">write_i8</a>&lt;W&gt;(&amp;mut self, writer: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.reference.html">&amp;mut W</a>, value: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.i8.html">i8</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/1.93.1/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>&gt;
<span class="where">where W: ?<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/1.93.1/std/io/trait.Write.html" title="trait std::io::Write">Write</a></span> { ... }
<span class="item-spacer"></span> fn <a href="#method.write_i16" class="fn">write_i16</a>&lt;W&gt;(&amp;mut self, writer: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.reference.html">&amp;mut W</a>, value: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.i16.html">i16</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/1.93.1/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>&gt;
<span class="where">where W: ?<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/1.93.1/std/io/trait.Write.html" title="trait std::io::Write">Write</a></span> { ... }
<span class="item-spacer"></span> fn <a href="#method.write_i32" class="fn">write_i32</a>&lt;W&gt;(&amp;mut self, writer: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.reference.html">&amp;mut W</a>, value: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.i32.html">i32</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/1.93.1/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>&gt;
<span class="where">where W: ?<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/1.93.1/std/io/trait.Write.html" title="trait std::io::Write">Write</a></span> { ... }
<span class="item-spacer"></span> fn <a href="#method.write_i64" class="fn">write_i64</a>&lt;W&gt;(&amp;mut self, writer: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.reference.html">&amp;mut W</a>, value: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.i64.html">i64</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/1.93.1/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>&gt;
<span class="where">where W: ?<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/1.93.1/std/io/trait.Write.html" title="trait std::io::Write">Write</a></span> { ... }
<span class="item-spacer"></span> fn <a href="#method.write_i128" class="fn">write_i128</a>&lt;W&gt;(&amp;mut self, writer: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.reference.html">&amp;mut W</a>, value: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.i128.html">i128</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/1.93.1/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>&gt;
<span class="where">where W: ?<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/1.93.1/std/io/trait.Write.html" title="trait std::io::Write">Write</a></span> { ... }
<span class="item-spacer"></span> fn <a href="#method.write_u8" class="fn">write_u8</a>&lt;W&gt;(&amp;mut self, writer: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.reference.html">&amp;mut W</a>, value: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.u8.html">u8</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/1.93.1/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>&gt;
<span class="where">where W: ?<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/1.93.1/std/io/trait.Write.html" title="trait std::io::Write">Write</a></span> { ... }
<span class="item-spacer"></span> fn <a href="#method.write_u16" class="fn">write_u16</a>&lt;W&gt;(&amp;mut self, writer: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.reference.html">&amp;mut W</a>, value: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.u16.html">u16</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/1.93.1/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>&gt;
<span class="where">where W: ?<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/1.93.1/std/io/trait.Write.html" title="trait std::io::Write">Write</a></span> { ... }
<span class="item-spacer"></span> fn <a href="#method.write_u32" class="fn">write_u32</a>&lt;W&gt;(&amp;mut self, writer: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.reference.html">&amp;mut W</a>, value: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.u32.html">u32</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/1.93.1/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>&gt;
<span class="where">where W: ?<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/1.93.1/std/io/trait.Write.html" title="trait std::io::Write">Write</a></span> { ... }
<span class="item-spacer"></span> fn <a href="#method.write_u64" class="fn">write_u64</a>&lt;W&gt;(&amp;mut self, writer: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.reference.html">&amp;mut W</a>, value: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.u64.html">u64</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/1.93.1/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>&gt;
<span class="where">where W: ?<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/1.93.1/std/io/trait.Write.html" title="trait std::io::Write">Write</a></span> { ... }
<span class="item-spacer"></span> fn <a href="#method.write_u128" class="fn">write_u128</a>&lt;W&gt;(&amp;mut self, writer: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.reference.html">&amp;mut W</a>, value: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.u128.html">u128</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/1.93.1/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>&gt;
<span class="where">where W: ?<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/1.93.1/std/io/trait.Write.html" title="trait std::io::Write">Write</a></span> { ... }
<span class="item-spacer"></span> fn <a href="#method.write_f32" class="fn">write_f32</a>&lt;W&gt;(&amp;mut self, writer: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.reference.html">&amp;mut W</a>, value: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.f32.html">f32</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/1.93.1/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>&gt;
<span class="where">where W: ?<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/1.93.1/std/io/trait.Write.html" title="trait std::io::Write">Write</a></span> { ... }
<span class="item-spacer"></span> fn <a href="#method.write_f64" class="fn">write_f64</a>&lt;W&gt;(&amp;mut self, writer: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.reference.html">&amp;mut W</a>, value: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.f64.html">f64</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/1.93.1/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>&gt;
<span class="where">where W: ?<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/1.93.1/std/io/trait.Write.html" title="trait std::io::Write">Write</a></span> { ... }
<span class="item-spacer"></span> fn <a href="#method.write_number_str" class="fn">write_number_str</a>&lt;W&gt;(&amp;mut self, writer: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.reference.html">&amp;mut W</a>, value: &amp;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.str.html">str</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/1.93.1/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>&gt;
<span class="where">where W: ?<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/1.93.1/std/io/trait.Write.html" title="trait std::io::Write">Write</a></span> { ... }
<span class="item-spacer"></span> fn <a href="#method.begin_string" class="fn">begin_string</a>&lt;W&gt;(&amp;mut self, writer: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.reference.html">&amp;mut W</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/1.93.1/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>&gt;
<span class="where">where W: ?<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/1.93.1/std/io/trait.Write.html" title="trait std::io::Write">Write</a></span> { ... }
<span class="item-spacer"></span> fn <a href="#method.end_string" class="fn">end_string</a>&lt;W&gt;(&amp;mut self, writer: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.reference.html">&amp;mut W</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/1.93.1/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>&gt;
<span class="where">where W: ?<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/1.93.1/std/io/trait.Write.html" title="trait std::io::Write">Write</a></span> { ... }
<span class="item-spacer"></span> fn <a href="#method.write_string_fragment" class="fn">write_string_fragment</a>&lt;W&gt;(
&amp;mut self,
writer: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.reference.html">&amp;mut W</a>,
fragment: &amp;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.str.html">str</a>,
) -&gt; <a class="type" href="https://doc.rust-lang.org/1.93.1/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>&gt;
<span class="where">where W: ?<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/1.93.1/std/io/trait.Write.html" title="trait std::io::Write">Write</a></span> { ... }
<span class="item-spacer"></span> fn <a href="#method.write_char_escape" class="fn">write_char_escape</a>&lt;W&gt;(
&amp;mut self,
writer: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.reference.html">&amp;mut W</a>,
char_escape: <a class="enum" href="enum.CharEscape.html" title="enum serde_json::ser::CharEscape">CharEscape</a>,
) -&gt; <a class="type" href="https://doc.rust-lang.org/1.93.1/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>&gt;
<span class="where">where W: ?<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/1.93.1/std/io/trait.Write.html" title="trait std::io::Write">Write</a></span> { ... }
<span class="item-spacer"></span> fn <a href="#method.write_byte_array" class="fn">write_byte_array</a>&lt;W&gt;(
&amp;mut self,
writer: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.reference.html">&amp;mut W</a>,
value: &amp;[<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.u8.html">u8</a>],
) -&gt; <a class="type" href="https://doc.rust-lang.org/1.93.1/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>&gt;
<span class="where">where W: ?<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/1.93.1/std/io/trait.Write.html" title="trait std::io::Write">Write</a></span> { ... }
<span class="item-spacer"></span> fn <a href="#method.begin_array" class="fn">begin_array</a>&lt;W&gt;(&amp;mut self, writer: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.reference.html">&amp;mut W</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/1.93.1/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>&gt;
<span class="where">where W: ?<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/1.93.1/std/io/trait.Write.html" title="trait std::io::Write">Write</a></span> { ... }
<span class="item-spacer"></span> fn <a href="#method.end_array" class="fn">end_array</a>&lt;W&gt;(&amp;mut self, writer: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.reference.html">&amp;mut W</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/1.93.1/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>&gt;
<span class="where">where W: ?<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/1.93.1/std/io/trait.Write.html" title="trait std::io::Write">Write</a></span> { ... }
<span class="item-spacer"></span> fn <a href="#method.begin_array_value" class="fn">begin_array_value</a>&lt;W&gt;(
&amp;mut self,
writer: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.reference.html">&amp;mut W</a>,
first: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.bool.html">bool</a>,
) -&gt; <a class="type" href="https://doc.rust-lang.org/1.93.1/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>&gt;
<span class="where">where W: ?<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/1.93.1/std/io/trait.Write.html" title="trait std::io::Write">Write</a></span> { ... }
<span class="item-spacer"></span> fn <a href="#method.end_array_value" class="fn">end_array_value</a>&lt;W&gt;(&amp;mut self, _writer: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.reference.html">&amp;mut W</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/1.93.1/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>&gt;
<span class="where">where W: ?<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/1.93.1/std/io/trait.Write.html" title="trait std::io::Write">Write</a></span> { ... }
<span class="item-spacer"></span> fn <a href="#method.begin_object" class="fn">begin_object</a>&lt;W&gt;(&amp;mut self, writer: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.reference.html">&amp;mut W</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/1.93.1/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>&gt;
<span class="where">where W: ?<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/1.93.1/std/io/trait.Write.html" title="trait std::io::Write">Write</a></span> { ... }
<span class="item-spacer"></span> fn <a href="#method.end_object" class="fn">end_object</a>&lt;W&gt;(&amp;mut self, writer: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.reference.html">&amp;mut W</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/1.93.1/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>&gt;
<span class="where">where W: ?<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/1.93.1/std/io/trait.Write.html" title="trait std::io::Write">Write</a></span> { ... }
<span class="item-spacer"></span> fn <a href="#method.begin_object_key" class="fn">begin_object_key</a>&lt;W&gt;(&amp;mut self, writer: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.reference.html">&amp;mut W</a>, first: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.bool.html">bool</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/1.93.1/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>&gt;
<span class="where">where W: ?<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/1.93.1/std/io/trait.Write.html" title="trait std::io::Write">Write</a></span> { ... }
<span class="item-spacer"></span> fn <a href="#method.end_object_key" class="fn">end_object_key</a>&lt;W&gt;(&amp;mut self, _writer: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.reference.html">&amp;mut W</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/1.93.1/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>&gt;
<span class="where">where W: ?<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/1.93.1/std/io/trait.Write.html" title="trait std::io::Write">Write</a></span> { ... }
<span class="item-spacer"></span> fn <a href="#method.begin_object_value" class="fn">begin_object_value</a>&lt;W&gt;(&amp;mut self, writer: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.reference.html">&amp;mut W</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/1.93.1/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>&gt;
<span class="where">where W: ?<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/1.93.1/std/io/trait.Write.html" title="trait std::io::Write">Write</a></span> { ... }
<span class="item-spacer"></span> fn <a href="#method.end_object_value" class="fn">end_object_value</a>&lt;W&gt;(&amp;mut self, _writer: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.reference.html">&amp;mut W</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/1.93.1/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>&gt;
<span class="where">where W: ?<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/1.93.1/std/io/trait.Write.html" title="trait std::io::Write">Write</a></span> { ... }
<span class="item-spacer"></span> fn <a href="#method.write_raw_fragment" class="fn">write_raw_fragment</a>&lt;W&gt;(
&amp;mut self,
writer: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.reference.html">&amp;mut W</a>,
fragment: &amp;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.str.html">str</a>,
) -&gt; <a class="type" href="https://doc.rust-lang.org/1.93.1/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>&gt;
<span class="where">where W: ?<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/1.93.1/std/io/trait.Write.html" title="trait std::io::Write">Write</a></span> { ... }
</details>}</code></pre><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>This trait abstracts away serializing the JSON control characters, which allows the user to
optionally pretty print the JSON output.</p>
</div></details><h2 id="provided-methods" class="section-header">Provided Methods<a href="#provided-methods" class="anchor">§</a></h2><div class="methods"><details class="toggle method-toggle" open><summary><section id="method.write_null" class="method"><a class="src rightside" href="../../src/serde_json/ser.rs.html#1544-1549">Source</a><h4 class="code-header">fn <a href="#method.write_null" class="fn">write_null</a>&lt;W&gt;(&amp;mut self, writer: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.reference.html">&amp;mut W</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/1.93.1/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>&gt;<div class="where">where
W: ?<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/1.93.1/std/io/trait.Write.html" title="trait std::io::Write">Write</a>,</div></h4></section></summary><div class="docblock"><p>Writes a <code>null</code> value to the specified writer.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.write_bool" class="method"><a class="src rightside" href="../../src/serde_json/ser.rs.html#1553-1563">Source</a><h4 class="code-header">fn <a href="#method.write_bool" class="fn">write_bool</a>&lt;W&gt;(&amp;mut self, writer: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.reference.html">&amp;mut W</a>, value: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.bool.html">bool</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/1.93.1/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>&gt;<div class="where">where
W: ?<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/1.93.1/std/io/trait.Write.html" title="trait std::io::Write">Write</a>,</div></h4></section></summary><div class="docblock"><p>Writes a <code>true</code> or <code>false</code> value to the specified writer.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.write_i8" class="method"><a class="src rightside" href="../../src/serde_json/ser.rs.html#1567-1574">Source</a><h4 class="code-header">fn <a href="#method.write_i8" class="fn">write_i8</a>&lt;W&gt;(&amp;mut self, writer: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.reference.html">&amp;mut W</a>, value: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.i8.html">i8</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/1.93.1/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>&gt;<div class="where">where
W: ?<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/1.93.1/std/io/trait.Write.html" title="trait std::io::Write">Write</a>,</div></h4></section></summary><div class="docblock"><p>Writes an integer value like <code>-123</code> to the specified writer.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.write_i16" class="method"><a class="src rightside" href="../../src/serde_json/ser.rs.html#1578-1585">Source</a><h4 class="code-header">fn <a href="#method.write_i16" class="fn">write_i16</a>&lt;W&gt;(&amp;mut self, writer: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.reference.html">&amp;mut W</a>, value: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.i16.html">i16</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/1.93.1/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>&gt;<div class="where">where
W: ?<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/1.93.1/std/io/trait.Write.html" title="trait std::io::Write">Write</a>,</div></h4></section></summary><div class="docblock"><p>Writes an integer value like <code>-123</code> to the specified writer.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.write_i32" class="method"><a class="src rightside" href="../../src/serde_json/ser.rs.html#1589-1596">Source</a><h4 class="code-header">fn <a href="#method.write_i32" class="fn">write_i32</a>&lt;W&gt;(&amp;mut self, writer: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.reference.html">&amp;mut W</a>, value: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.i32.html">i32</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/1.93.1/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>&gt;<div class="where">where
W: ?<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/1.93.1/std/io/trait.Write.html" title="trait std::io::Write">Write</a>,</div></h4></section></summary><div class="docblock"><p>Writes an integer value like <code>-123</code> to the specified writer.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.write_i64" class="method"><a class="src rightside" href="../../src/serde_json/ser.rs.html#1600-1607">Source</a><h4 class="code-header">fn <a href="#method.write_i64" class="fn">write_i64</a>&lt;W&gt;(&amp;mut self, writer: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.reference.html">&amp;mut W</a>, value: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.i64.html">i64</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/1.93.1/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>&gt;<div class="where">where
W: ?<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/1.93.1/std/io/trait.Write.html" title="trait std::io::Write">Write</a>,</div></h4></section></summary><div class="docblock"><p>Writes an integer value like <code>-123</code> to the specified writer.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.write_i128" class="method"><a class="src rightside" href="../../src/serde_json/ser.rs.html#1611-1618">Source</a><h4 class="code-header">fn <a href="#method.write_i128" class="fn">write_i128</a>&lt;W&gt;(&amp;mut self, writer: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.reference.html">&amp;mut W</a>, value: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.i128.html">i128</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/1.93.1/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>&gt;<div class="where">where
W: ?<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/1.93.1/std/io/trait.Write.html" title="trait std::io::Write">Write</a>,</div></h4></section></summary><div class="docblock"><p>Writes an integer value like <code>-123</code> to the specified writer.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.write_u8" class="method"><a class="src rightside" href="../../src/serde_json/ser.rs.html#1622-1629">Source</a><h4 class="code-header">fn <a href="#method.write_u8" class="fn">write_u8</a>&lt;W&gt;(&amp;mut self, writer: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.reference.html">&amp;mut W</a>, value: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.u8.html">u8</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/1.93.1/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>&gt;<div class="where">where
W: ?<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/1.93.1/std/io/trait.Write.html" title="trait std::io::Write">Write</a>,</div></h4></section></summary><div class="docblock"><p>Writes an integer value like <code>123</code> to the specified writer.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.write_u16" class="method"><a class="src rightside" href="../../src/serde_json/ser.rs.html#1633-1640">Source</a><h4 class="code-header">fn <a href="#method.write_u16" class="fn">write_u16</a>&lt;W&gt;(&amp;mut self, writer: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.reference.html">&amp;mut W</a>, value: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.u16.html">u16</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/1.93.1/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>&gt;<div class="where">where
W: ?<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/1.93.1/std/io/trait.Write.html" title="trait std::io::Write">Write</a>,</div></h4></section></summary><div class="docblock"><p>Writes an integer value like <code>123</code> to the specified writer.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.write_u32" class="method"><a class="src rightside" href="../../src/serde_json/ser.rs.html#1644-1651">Source</a><h4 class="code-header">fn <a href="#method.write_u32" class="fn">write_u32</a>&lt;W&gt;(&amp;mut self, writer: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.reference.html">&amp;mut W</a>, value: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.u32.html">u32</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/1.93.1/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>&gt;<div class="where">where
W: ?<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/1.93.1/std/io/trait.Write.html" title="trait std::io::Write">Write</a>,</div></h4></section></summary><div class="docblock"><p>Writes an integer value like <code>123</code> to the specified writer.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.write_u64" class="method"><a class="src rightside" href="../../src/serde_json/ser.rs.html#1655-1662">Source</a><h4 class="code-header">fn <a href="#method.write_u64" class="fn">write_u64</a>&lt;W&gt;(&amp;mut self, writer: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.reference.html">&amp;mut W</a>, value: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.u64.html">u64</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/1.93.1/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>&gt;<div class="where">where
W: ?<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/1.93.1/std/io/trait.Write.html" title="trait std::io::Write">Write</a>,</div></h4></section></summary><div class="docblock"><p>Writes an integer value like <code>123</code> to the specified writer.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.write_u128" class="method"><a class="src rightside" href="../../src/serde_json/ser.rs.html#1666-1673">Source</a><h4 class="code-header">fn <a href="#method.write_u128" class="fn">write_u128</a>&lt;W&gt;(&amp;mut self, writer: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.reference.html">&amp;mut W</a>, value: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.u128.html">u128</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/1.93.1/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>&gt;<div class="where">where
W: ?<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/1.93.1/std/io/trait.Write.html" title="trait std::io::Write">Write</a>,</div></h4></section></summary><div class="docblock"><p>Writes an integer value like <code>123</code> to the specified writer.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.write_f32" class="method"><a class="src rightside" href="../../src/serde_json/ser.rs.html#1691-1698">Source</a><h4 class="code-header">fn <a href="#method.write_f32" class="fn">write_f32</a>&lt;W&gt;(&amp;mut self, writer: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.reference.html">&amp;mut W</a>, value: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.f32.html">f32</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/1.93.1/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>&gt;<div class="where">where
W: ?<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/1.93.1/std/io/trait.Write.html" title="trait std::io::Write">Write</a>,</div></h4></section></summary><div class="docblock"><p>Writes a floating point value like <code>-31.26e+12</code> to the specified writer.</p>
<h5 id="special-cases"><a class="doc-anchor" href="#special-cases">§</a>Special cases</h5>
<p>This function <strong>does not</strong> check for NaN or infinity. If the input
number is not a finite float, the printed representation will be some
correctly formatted but unspecified numerical value.</p>
<p>Please check <a href="https://doc.rust-lang.org/1.93.1/std/primitive.f32.html#method.is_finite" title="method f32::is_finite"><code>is_finite</code></a> yourself before calling this function, or
check <a href="https://doc.rust-lang.org/1.93.1/std/primitive.f32.html#method.is_nan" title="method f32::is_nan"><code>is_nan</code></a> and <a href="https://doc.rust-lang.org/1.93.1/std/primitive.f32.html#method.is_infinite" title="method f32::is_infinite"><code>is_infinite</code></a> and handle those cases yourself
with a different <code>Formatter</code> method.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.write_f64" class="method"><a class="src rightside" href="../../src/serde_json/ser.rs.html#1716-1723">Source</a><h4 class="code-header">fn <a href="#method.write_f64" class="fn">write_f64</a>&lt;W&gt;(&amp;mut self, writer: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.reference.html">&amp;mut W</a>, value: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.f64.html">f64</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/1.93.1/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>&gt;<div class="where">where
W: ?<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/1.93.1/std/io/trait.Write.html" title="trait std::io::Write">Write</a>,</div></h4></section></summary><div class="docblock"><p>Writes a floating point value like <code>-31.26e+12</code> to the specified writer.</p>
<h5 id="special-cases-1"><a class="doc-anchor" href="#special-cases-1">§</a>Special cases</h5>
<p>This function <strong>does not</strong> check for NaN or infinity. If the input
number is not a finite float, the printed representation will be some
correctly formatted but unspecified numerical value.</p>
<p>Please check <a href="https://doc.rust-lang.org/1.93.1/std/primitive.f64.html#method.is_finite" title="method f64::is_finite"><code>is_finite</code></a> yourself before calling this function, or
check <a href="https://doc.rust-lang.org/1.93.1/std/primitive.f64.html#method.is_nan" title="method f64::is_nan"><code>is_nan</code></a> and <a href="https://doc.rust-lang.org/1.93.1/std/primitive.f64.html#method.is_infinite" title="method f64::is_infinite"><code>is_infinite</code></a> and handle those cases yourself
with a different <code>Formatter</code> method.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.write_number_str" class="method"><a class="src rightside" href="../../src/serde_json/ser.rs.html#1727-1732">Source</a><h4 class="code-header">fn <a href="#method.write_number_str" class="fn">write_number_str</a>&lt;W&gt;(&amp;mut self, writer: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.reference.html">&amp;mut W</a>, value: &amp;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.str.html">str</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/1.93.1/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>&gt;<div class="where">where
W: ?<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/1.93.1/std/io/trait.Write.html" title="trait std::io::Write">Write</a>,</div></h4></section></summary><div class="docblock"><p>Writes a number that has already been rendered to a string.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.begin_string" class="method"><a class="src rightside" href="../../src/serde_json/ser.rs.html#1737-1742">Source</a><h4 class="code-header">fn <a href="#method.begin_string" class="fn">begin_string</a>&lt;W&gt;(&amp;mut self, writer: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.reference.html">&amp;mut W</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/1.93.1/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>&gt;<div class="where">where
W: ?<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/1.93.1/std/io/trait.Write.html" title="trait std::io::Write">Write</a>,</div></h4></section></summary><div class="docblock"><p>Called before each series of <code>write_string_fragment</code> and
<code>write_char_escape</code>. Writes a <code>"</code> to the specified writer.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.end_string" class="method"><a class="src rightside" href="../../src/serde_json/ser.rs.html#1747-1752">Source</a><h4 class="code-header">fn <a href="#method.end_string" class="fn">end_string</a>&lt;W&gt;(&amp;mut self, writer: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.reference.html">&amp;mut W</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/1.93.1/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>&gt;<div class="where">where
W: ?<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/1.93.1/std/io/trait.Write.html" title="trait std::io::Write">Write</a>,</div></h4></section></summary><div class="docblock"><p>Called after each series of <code>write_string_fragment</code> and
<code>write_char_escape</code>. Writes a <code>"</code> to the specified writer.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.write_string_fragment" class="method"><a class="src rightside" href="../../src/serde_json/ser.rs.html#1757-1762">Source</a><h4 class="code-header">fn <a href="#method.write_string_fragment" class="fn">write_string_fragment</a>&lt;W&gt;(
&amp;mut self,
writer: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.reference.html">&amp;mut W</a>,
fragment: &amp;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.str.html">str</a>,
) -&gt; <a class="type" href="https://doc.rust-lang.org/1.93.1/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>&gt;<div class="where">where
W: ?<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/1.93.1/std/io/trait.Write.html" title="trait std::io::Write">Write</a>,</div></h4></section></summary><div class="docblock"><p>Writes a string fragment that doesn’t need any escaping to the
specified writer.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.write_char_escape" class="method"><a class="src rightside" href="../../src/serde_json/ser.rs.html#1766-1799">Source</a><h4 class="code-header">fn <a href="#method.write_char_escape" class="fn">write_char_escape</a>&lt;W&gt;(
&amp;mut self,
writer: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.reference.html">&amp;mut W</a>,
char_escape: <a class="enum" href="enum.CharEscape.html" title="enum serde_json::ser::CharEscape">CharEscape</a>,
) -&gt; <a class="type" href="https://doc.rust-lang.org/1.93.1/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>&gt;<div class="where">where
W: ?<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/1.93.1/std/io/trait.Write.html" title="trait std::io::Write">Write</a>,</div></h4></section></summary><div class="docblock"><p>Writes a character escape code to the specified writer.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.write_byte_array" class="method"><a class="src rightside" href="../../src/serde_json/ser.rs.html#1804-1817">Source</a><h4 class="code-header">fn <a href="#method.write_byte_array" class="fn">write_byte_array</a>&lt;W&gt;(&amp;mut self, writer: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.reference.html">&amp;mut W</a>, value: &amp;[<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.u8.html">u8</a>]) -&gt; <a class="type" href="https://doc.rust-lang.org/1.93.1/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>&gt;<div class="where">where
W: ?<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/1.93.1/std/io/trait.Write.html" title="trait std::io::Write">Write</a>,</div></h4></section></summary><div class="docblock"><p>Writes the representation of a byte array. Formatters can choose whether
to represent bytes as a JSON array of integers (the default), or some
JSON string encoding like hex or base64.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.begin_array" class="method"><a class="src rightside" href="../../src/serde_json/ser.rs.html#1822-1827">Source</a><h4 class="code-header">fn <a href="#method.begin_array" class="fn">begin_array</a>&lt;W&gt;(&amp;mut self, writer: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.reference.html">&amp;mut W</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/1.93.1/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>&gt;<div class="where">where
W: ?<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/1.93.1/std/io/trait.Write.html" title="trait std::io::Write">Write</a>,</div></h4></section></summary><div class="docblock"><p>Called before every array. Writes a <code>[</code> to the specified
writer.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.end_array" class="method"><a class="src rightside" href="../../src/serde_json/ser.rs.html#1832-1837">Source</a><h4 class="code-header">fn <a href="#method.end_array" class="fn">end_array</a>&lt;W&gt;(&amp;mut self, writer: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.reference.html">&amp;mut W</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/1.93.1/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>&gt;<div class="where">where
W: ?<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/1.93.1/std/io/trait.Write.html" title="trait std::io::Write">Write</a>,</div></h4></section></summary><div class="docblock"><p>Called after every array. Writes a <code>]</code> to the specified
writer.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.begin_array_value" class="method"><a class="src rightside" href="../../src/serde_json/ser.rs.html#1842-1851">Source</a><h4 class="code-header">fn <a href="#method.begin_array_value" class="fn">begin_array_value</a>&lt;W&gt;(&amp;mut self, writer: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.reference.html">&amp;mut W</a>, first: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.bool.html">bool</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/1.93.1/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>&gt;<div class="where">where
W: ?<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/1.93.1/std/io/trait.Write.html" title="trait std::io::Write">Write</a>,</div></h4></section></summary><div class="docblock"><p>Called before every array value. Writes a <code>,</code> if needed to
the specified writer.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.end_array_value" class="method"><a class="src rightside" href="../../src/serde_json/ser.rs.html#1855-1860">Source</a><h4 class="code-header">fn <a href="#method.end_array_value" class="fn">end_array_value</a>&lt;W&gt;(&amp;mut self, _writer: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.reference.html">&amp;mut W</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/1.93.1/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>&gt;<div class="where">where
W: ?<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/1.93.1/std/io/trait.Write.html" title="trait std::io::Write">Write</a>,</div></h4></section></summary><div class="docblock"><p>Called after every array value.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.begin_object" class="method"><a class="src rightside" href="../../src/serde_json/ser.rs.html#1865-1870">Source</a><h4 class="code-header">fn <a href="#method.begin_object" class="fn">begin_object</a>&lt;W&gt;(&amp;mut self, writer: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.reference.html">&amp;mut W</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/1.93.1/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>&gt;<div class="where">where
W: ?<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/1.93.1/std/io/trait.Write.html" title="trait std::io::Write">Write</a>,</div></h4></section></summary><div class="docblock"><p>Called before every object. Writes a <code>{</code> to the specified
writer.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.end_object" class="method"><a class="src rightside" href="../../src/serde_json/ser.rs.html#1875-1880">Source</a><h4 class="code-header">fn <a href="#method.end_object" class="fn">end_object</a>&lt;W&gt;(&amp;mut self, writer: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.reference.html">&amp;mut W</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/1.93.1/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>&gt;<div class="where">where
W: ?<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/1.93.1/std/io/trait.Write.html" title="trait std::io::Write">Write</a>,</div></h4></section></summary><div class="docblock"><p>Called after every object. Writes a <code>}</code> to the specified
writer.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.begin_object_key" class="method"><a class="src rightside" href="../../src/serde_json/ser.rs.html#1884-1893">Source</a><h4 class="code-header">fn <a href="#method.begin_object_key" class="fn">begin_object_key</a>&lt;W&gt;(&amp;mut self, writer: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.reference.html">&amp;mut W</a>, first: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.bool.html">bool</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/1.93.1/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>&gt;<div class="where">where
W: ?<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/1.93.1/std/io/trait.Write.html" title="trait std::io::Write">Write</a>,</div></h4></section></summary><div class="docblock"><p>Called before every object key.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.end_object_key" class="method"><a class="src rightside" href="../../src/serde_json/ser.rs.html#1899-1904">Source</a><h4 class="code-header">fn <a href="#method.end_object_key" class="fn">end_object_key</a>&lt;W&gt;(&amp;mut self, _writer: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.reference.html">&amp;mut W</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/1.93.1/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>&gt;<div class="where">where
W: ?<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/1.93.1/std/io/trait.Write.html" title="trait std::io::Write">Write</a>,</div></h4></section></summary><div class="docblock"><p>Called after every object key. A <code>:</code> should be written to the
specified writer by either this method or
<code>begin_object_value</code>.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.begin_object_value" class="method"><a class="src rightside" href="../../src/serde_json/ser.rs.html#1910-1915">Source</a><h4 class="code-header">fn <a href="#method.begin_object_value" class="fn">begin_object_value</a>&lt;W&gt;(&amp;mut self, writer: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.reference.html">&amp;mut W</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/1.93.1/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>&gt;<div class="where">where
W: ?<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/1.93.1/std/io/trait.Write.html" title="trait std::io::Write">Write</a>,</div></h4></section></summary><div class="docblock"><p>Called before every object value. A <code>:</code> should be written to
the specified writer by either this method or
<code>end_object_key</code>.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.end_object_value" class="method"><a class="src rightside" href="../../src/serde_json/ser.rs.html#1919-1924">Source</a><h4 class="code-header">fn <a href="#method.end_object_value" class="fn">end_object_value</a>&lt;W&gt;(&amp;mut self, _writer: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.reference.html">&amp;mut W</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/1.93.1/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>&gt;<div class="where">where
W: ?<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/1.93.1/std/io/trait.Write.html" title="trait std::io::Write">Write</a>,</div></h4></section></summary><div class="docblock"><p>Called after every object value.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.write_raw_fragment" class="method"><a class="src rightside" href="../../src/serde_json/ser.rs.html#1929-1934">Source</a><h4 class="code-header">fn <a href="#method.write_raw_fragment" class="fn">write_raw_fragment</a>&lt;W&gt;(
&amp;mut self,
writer: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.reference.html">&amp;mut W</a>,
fragment: &amp;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.str.html">str</a>,
) -&gt; <a class="type" href="https://doc.rust-lang.org/1.93.1/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>&gt;<div class="where">where
W: ?<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/1.93.1/std/io/trait.Write.html" title="trait std::io::Write">Write</a>,</div></h4></section></summary><div class="docblock"><p>Writes a raw JSON fragment that doesn’t need any escaping to the
specified writer.</p>
</div></details></div><h2 id="dyn-compatibility" class="section-header">Dyn Compatibility<a href="#dyn-compatibility" class="anchor">§</a></h2><div class="dyn-compatibility-info"><p>This trait is <b>not</b> <a href="https://doc.rust-lang.org/1.93.1/reference/items/traits.html#dyn-compatibility">dyn compatible</a>.</p><p><i>In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.</i></p></div><h2 id="implementors" class="section-header">Implementors<a href="#implementors" class="anchor">§</a></h2><div id="implementors-list"><section id="impl-Formatter-for-CompactFormatter" class="impl"><a class="src rightside" href="../../src/serde_json/ser.rs.html#1941">Source</a><a href="#impl-Formatter-for-CompactFormatter" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="trait.Formatter.html" title="trait serde_json::ser::Formatter">Formatter</a> for <a class="struct" href="struct.CompactFormatter.html" title="struct serde_json::ser::CompactFormatter">CompactFormatter</a></h3></section><section id="impl-Formatter-for-PrettyFormatter%3C'a%3E" class="impl"><a class="src rightside" href="../../src/serde_json/ser.rs.html#1973-2067">Source</a><a href="#impl-Formatter-for-PrettyFormatter%3C'a%3E" class="anchor">§</a><h3 class="code-header">impl&lt;'a&gt; <a class="trait" href="trait.Formatter.html" title="trait serde_json::ser::Formatter">Formatter</a> for <a class="struct" href="struct.PrettyFormatter.html" title="struct serde_json::ser::PrettyFormatter">PrettyFormatter</a>&lt;'a&gt;</h3></section></div><script src="../../trait.impl/serde_json/ser/trait.Formatter.js" async></script></section></div></main></body></html>
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