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<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="A writer to which formatted representations of spans and events are written."><title>Writer in tracing_subscriber::fmt::format - Rust</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../static.files/SourceSerif4-Regular-46f98efaafac5295.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../static.files/FiraSans-Regular-018c141bf0843ffd.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../static.files/FiraSans-Medium-8f9a781e4970d388.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../static.files/SourceCodePro-Regular-562dcc5011b6de7d.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../static.files/SourceCodePro-Semibold-d899c5a5c4aeb14a.ttf.woff2"><link rel="stylesheet" href="../../../static.files/normalize-76eba96aa4d2e634.css"><link rel="stylesheet" href="../../../static.files/rustdoc-ac92e1bbe349e143.css"><meta name="rustdoc-vars" data-root-path="../../../" data-static-root-path="../../../static.files/" data-current-crate="tracing_subscriber" data-themes="" data-resource-suffix="" data-rustdoc-version="1.76.0 (07dca489a 2024-02-04)" data-channel="1.76.0" data-search-js="search-2b6ce74ff89ae146.js" data-settings-js="settings-4313503d2e1961c2.js" ><script src="../../../static.files/storage-f2adc0d6ca4d09fb.js"></script><script defer src="sidebar-items.js"></script><script defer src="../../../static.files/main-305769736d49e732.js"></script><noscript><link rel="stylesheet" href="../../../static.files/noscript-feafe1bb7466e4bd.css"></noscript><link rel="alternate icon" type="image/png" href="../../../static.files/favicon-16x16-8b506e7a72182f1c.png"><link rel="alternate icon" type="image/png" href="../../../static.files/favicon-32x32-422f7d1d52889060.png"><link rel="icon" type="image/svg+xml" href="../../../static.files/favicon-2c020d218678b618.svg"></head><body class="rustdoc struct"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="mobile-topbar"><button class="sidebar-menu-toggle">☰</button><a class="logo-container" href="../../../tracing_subscriber/index.html"><img src="https://raw.githubusercontent.com/tokio-rs/tracing/master/assets/logo-type.png" alt=""></a></nav><nav class="sidebar"><div class="sidebar-crate"><a class="logo-container" href="../../../tracing_subscriber/index.html"><img src="https://raw.githubusercontent.com/tokio-rs/tracing/master/assets/logo-type.png" alt="logo"></a><h2><a href="../../../tracing_subscriber/index.html">tracing_subscriber</a><span class="version">0.3.18</span></h2></div><h2 class="location"><a href="#">Writer</a></h2><div class="sidebar-elems"><section><h3><a href="#implementations">Methods</a></h3><ul class="block method"><li><a href="#method.by_ref">by_ref</a></li><li><a href="#method.has_ansi_escapes">has_ansi_escapes</a></li><li><a href="#method.new">new</a></li><li><a href="#method.write_char">write_char</a></li><li><a href="#method.write_fmt">write_fmt</a></li><li><a href="#method.write_str">write_str</a></li></ul><h3><a href="#trait-implementations">Trait Implementations</a></h3><ul class="block trait-implementation"><li><a href="#impl-Debug-for-Writer%3C'_%3E">Debug</a></li><li><a href="#impl-MakeVisitor%3CWriter%3C'a%3E%3E-for-DefaultFields">MakeVisitor<Writer<'a>></a></li><li><a href="#impl-MakeVisitor%3CWriter%3C'a%3E%3E-for-FieldFn%3CF%3E">MakeVisitor<Writer<'a>></a></li><li><a href="#impl-MakeVisitor%3CWriter%3C'a%3E%3E-for-PrettyFields">MakeVisitor<Writer<'a>></a></li><li><a href="#impl-Write-for-Writer%3C'_%3E">Write</a></li></ul><h3><a href="#synthetic-implementations">Auto Trait Implementations</a></h3><ul class="block synthetic-implementation"><li><a href="#impl-Ref
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<main><div class="width-limiter"><nav class="sub"><form class="search-form"><span></span><div id="sidebar-button" tabindex="-1"><a href="../../../tracing_subscriber/all.html" title="show sidebar"></a></div><input class="search-input" name="search" aria-label="Run search in the documentation" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><div id="help-button" tabindex="-1"><a href="../../../help.html" title="help">?</a></div><div id="settings-menu" tabindex="-1"><a href="../../../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../../../static.files/wheel-7b819b6101059cd0.svg"></a></div></form></nav><section id="main-content" class="content"><div class="main-heading"><h1>Struct <a href="../../index.html">tracing_subscriber</a>::<wbr><a href="../index.html">fmt</a>::<wbr><a href="index.html">format</a>::<wbr><a class="struct" href="#">Writer</a><button id="copy-path" title="Copy item path to clipboard"><img src="../../../static.files/clipboard-7571035ce49a181d.svg" width="19" height="18" alt="Copy item path"></button></h1><span class="out-of-band"><a class="src" href="../../../src/tracing_subscriber/fmt/format/mod.rs.html#306-310">source</a> · <button id="toggle-all-docs" title="collapse all docs">[<span>−</span>]</button></span></div><pre class="rust item-decl"><code>pub struct Writer<'writer> { <span class="comment">/* private fields */</span> }</code></pre><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>A writer to which formatted representations of spans and events are written.</p>
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<p>This type is provided as input to the <a href="../trait.FormatEvent.html#tymethod.format_event" title="method tracing_subscriber::fmt::FormatEvent::format_event"><code>FormatEvent::format_event</code></a> and
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<a href="../trait.FormatFields.html#tymethod.format_fields" title="method tracing_subscriber::fmt::FormatFields::format_fields"><code>FormatFields::format_fields</code></a> methods, which will write formatted
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representations of <a href="../../../tracing_core/event/struct.Event.html" title="struct tracing_core::event::Event"><code>Event</code></a>s and <a href="../../../tracing_core/field/index.html" title="mod tracing_core::field">fields</a> to the <code>Writer</code>.</p>
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<p>This type implements the <a href="https://doc.rust-lang.org/1.76.0/core/fmt/trait.Write.html" title="trait core::fmt::Write"><code>std::fmt::Write</code></a> trait, allowing it to be used
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with any function that takes an instance of <a href="https://doc.rust-lang.org/1.76.0/core/fmt/trait.Write.html" title="trait core::fmt::Write"><code>std::fmt::Write</code></a>.
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Additionally, it can be used with the standard library’s <a href="https://doc.rust-lang.org/1.76.0/core/macro.write.html" title="macro core::write"><code>std::write!</code></a> and
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<a href="https://doc.rust-lang.org/1.76.0/core/macro.writeln.html" title="macro core::writeln"><code>std::writeln!</code></a> macros.</p>
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<p>Additionally, a <code>Writer</code> may expose additional <code>tracing</code>-specific
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information to the formatter implementation.</p>
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</div></details><h2 id="implementations" class="section-header">Implementations<a href="#implementations" class="anchor">§</a></h2><div id="implementations-list"><details class="toggle implementors-toggle" open><summary><section id="impl-Writer%3C'writer%3E" class="impl"><a class="src rightside" href="../../../src/tracing_subscriber/fmt/format/mod.rs.html#416-559">source</a><a href="#impl-Writer%3C'writer%3E" class="anchor">§</a><h3 class="code-header">impl<'writer> <a class="struct" href="struct.Writer.html" title="struct tracing_subscriber::fmt::format::Writer">Writer</a><'writer></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.new" class="method"><a class="src rightside" href="../../../src/tracing_subscriber/fmt/format/mod.rs.html#433-438">source</a><h4 class="code-header">pub fn <a href="#method.new" class="fn">new</a>(writer: &'writer mut impl <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/fmt/trait.Write.html" title="trait core::fmt::Write">Write</a>) -> Self</h4></section></summary><div class="docblock"><p>Create a new <a href="struct.Writer.html" title="struct tracing_subscriber::fmt::format::Writer"><code>Writer</code></a> from any type that implements <a href="https://doc.rust-lang.org/1.76.0/core/fmt/trait.Write.html" title="trait core::fmt::Write"><code>fmt::Write</code></a>.</p>
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<p>The returned <code>Writer</code> value may be passed as an argument to methods
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such as <a href="struct.Format.html#method.format_event" title="method tracing_subscriber::fmt::format::Format::format_event"><code>Format::format_event</code></a>. Since constructing a <code>Writer</code>
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mutably borrows the underlying <a href="https://doc.rust-lang.org/1.76.0/core/fmt/trait.Write.html" title="trait core::fmt::Write"><code>fmt::Write</code></a> instance, that value may
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be accessed again once the <code>Writer</code> is dropped. For example, if the
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value implementing <a href="https://doc.rust-lang.org/1.76.0/core/fmt/trait.Write.html" title="trait core::fmt::Write"><code>fmt::Write</code></a> is a <a href="https://doc.rust-lang.org/1.76.0/alloc/string/struct.String.html" title="struct alloc::string::String"><code>String</code></a>, it will contain
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the formatted output of <a href="struct.Format.html#method.format_event" title="method tracing_subscriber::fmt::format::Format::format_event"><code>Format::format_event</code></a>, which may then be
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used for other purposes.</p>
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</div></details><details class="toggle method-toggle" open><summary><section id="method.by_ref" class="method"><a class="src rightside" href="../../../src/tracing_subscriber/fmt/format/mod.rs.html#450-456">source</a><h4 class="code-header">pub fn <a href="#method.by_ref" class="fn">by_ref</a>(&mut self) -> <a class="struct" href="struct.Writer.html" title="struct tracing_subscriber::fmt::format::Writer">Writer</a><'_></h4></section></summary><div class="docblock"><p>Return a new <code>Writer</code> that mutably borrows <code>self</code>.</p>
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<p>This can be used to temporarily borrow a <code>Writer</code> to pass a new <code>Writer</code>
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to a function that takes a <code>Writer</code> by value, allowing the original writer
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to still be used once that function returns.</p>
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</div></details><details class="toggle method-toggle" open><summary><section id="method.write_str" class="method"><a class="src rightside" href="../../../src/tracing_subscriber/fmt/format/mod.rs.html#475-477">source</a><h4 class="code-header">pub fn <a href="#method.write_str" class="fn">write_str</a>(&mut self, s: &<a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.str.html">str</a>) -> <a class="type" href="https://doc.rust-lang.org/1.76.0/core/fmt/type.Result.html" title="type core::fmt::Result">Result</a></h4></section></summary><div class="docblock"><p>Writes a string slice into this <code>Writer</code>, returning whether the write succeeded.</p>
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<p>This method can only succeed if the entire string slice was successfully
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written, and this method will not return until all data has been written
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or an error occurs.</p>
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<p>This is identical to calling the <a href="https://doc.rust-lang.org/1.76.0/core/fmt/trait.Write.html#tymethod.write_str" title="method core::fmt::Write::write_str"><code>write_str</code> method</a> from the <code>Writer</code>’s
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<a href="https://doc.rust-lang.org/1.76.0/core/fmt/trait.Write.html" title="trait core::fmt::Write"><code>std::fmt::Write</code></a> implementation. However, it is also provided as an
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inherent method, so that <code>Writer</code>s can be used without needing to import the
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<a href="https://doc.rust-lang.org/1.76.0/core/fmt/trait.Write.html" title="trait core::fmt::Write"><code>std::fmt::Write</code></a> trait.</p>
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<h5 id="errors"><a href="#errors">Errors</a></h5>
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<p>This function will return an instance of <a href="https://doc.rust-lang.org/1.76.0/core/fmt/struct.Error.html" title="struct core::fmt::Error"><code>std::fmt::Error</code></a> on error.</p>
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</div></details><details class="toggle method-toggle" open><summary><section id="method.write_char" class="method"><a class="src rightside" href="../../../src/tracing_subscriber/fmt/format/mod.rs.html#497-499">source</a><h4 class="code-header">pub fn <a href="#method.write_char" class="fn">write_char</a>(&mut self, c: <a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.char.html">char</a>) -> <a class="type" href="https://doc.rust-lang.org/1.76.0/core/fmt/type.Result.html" title="type core::fmt::Result">Result</a></h4></section></summary><div class="docblock"><p>Writes a <a href="https://doc.rust-lang.org/1.76.0/std/primitive.char.html" title="primitive char"><code>char</code></a> into this writer, returning whether the write succeeded.</p>
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<p>A single <a href="https://doc.rust-lang.org/1.76.0/std/primitive.char.html" title="primitive char"><code>char</code></a> may be encoded as more than one byte.
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This method can only succeed if the entire byte sequence was successfully
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written, and this method will not return until all data has been
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written or an error occurs.</p>
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<p>This is identical to calling the <a href="https://doc.rust-lang.org/1.76.0/core/fmt/trait.Write.html#method.write_char" title="method core::fmt::Write::write_char"><code>write_char</code> method</a> from the <code>Writer</code>’s
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<a href="https://doc.rust-lang.org/1.76.0/core/fmt/trait.Write.html" title="trait core::fmt::Write"><code>std::fmt::Write</code></a> implementation. However, it is also provided as an
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inherent method, so that <code>Writer</code>s can be used without needing to import the
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<a href="https://doc.rust-lang.org/1.76.0/core/fmt/trait.Write.html" title="trait core::fmt::Write"><code>std::fmt::Write</code></a> trait.</p>
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<h5 id="errors-1"><a href="#errors-1">Errors</a></h5>
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<p>This function will return an instance of <a href="https://doc.rust-lang.org/1.76.0/core/fmt/struct.Error.html" title="struct core::fmt::Error"><code>std::fmt::Error</code></a> on error.</p>
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</div></details><details class="toggle method-toggle" open><summary><section id="method.write_fmt" class="method"><a class="src rightside" href="../../../src/tracing_subscriber/fmt/format/mod.rs.html#513-515">source</a><h4 class="code-header">pub fn <a href="#method.write_fmt" class="fn">write_fmt</a>(&mut self, args: <a class="struct" href="https://doc.rust-lang.org/1.76.0/core/fmt/struct.Arguments.html" title="struct core::fmt::Arguments">Arguments</a><'_>) -> <a class="type" href="https://doc.rust-lang.org/1.76.0/core/fmt/type.Result.html" title="type core::fmt::Result">Result</a></h4></section></summary><div class="docblock"><p>Glue for usage of the <a href="https://doc.rust-lang.org/1.76.0/core/macro.write.html" title="macro core::write"><code>write!</code></a> macro with <code>Writer</code>s.</p>
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<p>This method should generally not be invoked manually, but rather through
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the <a href="https://doc.rust-lang.org/1.76.0/core/macro.write.html" title="macro core::write"><code>write!</code></a> macro itself.</p>
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<p>This is identical to calling the <a href="https://doc.rust-lang.org/1.76.0/core/fmt/trait.Write.html#method.write_fmt" title="method core::fmt::Write::write_fmt"><code>write_fmt</code> method</a> from the <code>Writer</code>’s
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<a href="https://doc.rust-lang.org/1.76.0/core/fmt/trait.Write.html" title="trait core::fmt::Write"><code>std::fmt::Write</code></a> implementation. However, it is also provided as an
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inherent method, so that <code>Writer</code>s can be used with the [<code>write!</code> macro]
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without needing to import the
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<a href="https://doc.rust-lang.org/1.76.0/core/fmt/trait.Write.html" title="trait core::fmt::Write"><code>std::fmt::Write</code></a> trait.</p>
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</div></details><details class="toggle method-toggle" open><summary><section id="method.has_ansi_escapes" class="method"><a class="src rightside" href="../../../src/tracing_subscriber/fmt/format/mod.rs.html#523-525">source</a><h4 class="code-header">pub fn <a href="#method.has_ansi_escapes" class="fn">has_ansi_escapes</a>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.bool.html">bool</a></h4></section></summary><div class="docblock"><p>Returns <code>true</code> if <a href="https://en.wikipedia.org/wiki/ANSI_escape_code">ANSI escape codes</a> may be used to add colors
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and other formatting when writing to this <code>Writer</code>.</p>
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<p>If this returns <code>false</code>, formatters should not emit ANSI escape codes.</p>
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</div></details></div></details></div><h2 id="trait-implementations" class="section-header">Trait Implementations<a href="#trait-implementations" class="anchor">§</a></h2><div id="trait-implementations-list"><details class="toggle implementors-toggle" open><summary><section id="impl-Debug-for-Writer%3C'_%3E" class="impl"><a class="src rightside" href="../../../src/tracing_subscriber/fmt/format/mod.rs.html#578-585">source</a><a href="#impl-Debug-for-Writer%3C'_%3E" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/fmt/trait.Debug.html" title="trait core::fmt::Debug">Debug</a> for <a class="struct" href="struct.Writer.html" title="struct tracing_subscriber::fmt::format::Writer">Writer</a><'_></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.fmt" class="method trait-impl"><a class="src rightside" href="../../../src/tracing_subscriber/fmt/format/mod.rs.html#579-584">source</a><a href="#method.fmt" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/fmt/trait.Debug.html#tymethod.fmt" class="fn">fmt</a>(&self, f: &mut <a class="struct" href="https://doc.rust-lang.org/1.76.0/core/fmt/struct.Formatter.html" title="struct core::fmt::Formatter">Formatter</a><'_>) -> <a class="type" href="https://doc.rust-lang.org/1.76.0/core/fmt/type.Result.html" title="type core::fmt::Result">Result</a></h4></section></summary><div class='docblock'>Formats the value using the given formatter. <a href="https://doc.rust-lang.org/1.76.0/core/fmt/trait.Debug.html#tymethod.fmt">Read more</a></div></details></div></details><details class="toggle implementors-toggle" open><summary><section id="impl-MakeVisitor%3CWriter%3C'a%3E%3E-for-DefaultFields" class="impl"><a class="src rightside" href="../../../src/tracing_subscriber/fmt/format/mod.rs.html#1205-1212">source</a><a href="#impl-MakeVisitor%3CWriter%3C'a%3E%3E-for-DefaultFields" class="anchor">§</a><h3 class="code-header">impl<'a> <a class="trait" href="../../field/trait.MakeVisitor.html" title="trait tracing_subscriber::field::MakeVisitor">MakeVisitor</a><<a class="struct" href="struct.Writer.html" title="struct tracing_subscriber::fmt::format::Writer">Writer</a><'a>> for <a class="struct" href="struct.DefaultFields.html" title="struct tracing_subscriber::fmt::format::DefaultFields">DefaultFields</a></h3></section></summary><div class="impl-items"><details class="toggle" open><summary><section id="associatedtype.Visitor-1" class="associatedtype trait-impl"><a href="#associatedtype.Visitor-1" class="anchor">§</a><h4 class="code-header">type <a href="../../field/trait.MakeVisitor.html#associatedtype.Visitor" class="associatedtype">Visitor</a> = <a class="struct" href="struct.DefaultVisitor.html" title="struct tracing_subscriber::fmt::format::DefaultVisitor">DefaultVisitor</a><'a></h4></section></summary><div class='docblock'>The visitor type produced by this <code>MakeVisitor</code>.</div></details><details class="toggle method-toggle" open><summary><section id="method.make_visitor-1" class="method trait-impl"><a class="src rightside" href="../../../src/tracing_subscriber/fmt/format/mod.rs.html#1209-1211">source</a><a href="#method.make_visitor-1" class="anchor">§</a><h4 class="code-header">fn <a href="../../field/trait.MakeVisitor.html#tymethod.make_visitor" class="fn">make_visitor</a>(&self, target: <a class="struct" href="struct.Writer.html" title="struct tracing_subscriber::fmt::format::Writer">Writer</a><'a>) -> Self::<a class="associatedtype" href="../../field/trait.MakeVisitor.html#associatedtype.Visitor" title="type tracing_subscriber::field::MakeVisitor::Visitor">Visitor</a></h4></section></summary><div class='docblock'>Make a new visitor for the provided <code>target</code>.</div></details></div></details><details class="toggle implementors-toggle" open><summary><section id="impl-MakeVisitor%3CWriter%3C'a%3E%3E-for-FieldFn%3CF%3E" class="impl"><a class="src
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F: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/ops/function/trait.Fn.html" title="trait core::ops::function::Fn">Fn</a>(&mut <a class="struct" href="struct.Writer.html" title="struct tracing_subscriber::fmt::format::Writer">Writer</a><'a>, &<a class="struct" href="../../../tracing_core/field/struct.Field.html" title="struct tracing_core::field::Field">Field</a>, &dyn <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/fmt/trait.Debug.html" title="trait core::fmt::Debug">Debug</a>) -> <a class="type" href="https://doc.rust-lang.org/1.76.0/core/fmt/type.Result.html" title="type core::fmt::Result">Result</a> + <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle" open><summary><section id="associatedtype.Visitor" class="associatedtype trait-impl"><a href="#associatedtype.Visitor" class="anchor">§</a><h4 class="code-header">type <a href="../../field/trait.MakeVisitor.html#associatedtype.Visitor" class="associatedtype">Visitor</a> = <a class="struct" href="struct.FieldFnVisitor.html" title="struct tracing_subscriber::fmt::format::FieldFnVisitor">FieldFnVisitor</a><'a, F></h4></section></summary><div class='docblock'>The visitor type produced by this <code>MakeVisitor</code>.</div></details><details class="toggle method-toggle" open><summary><section id="method.make_visitor" class="method trait-impl"><a class="src rightside" href="../../../src/tracing_subscriber/fmt/format/mod.rs.html#1531-1537">source</a><a href="#method.make_visitor" class="anchor">§</a><h4 class="code-header">fn <a href="../../field/trait.MakeVisitor.html#tymethod.make_visitor" class="fn">make_visitor</a>(&self, writer: <a class="struct" href="struct.Writer.html" title="struct tracing_subscriber::fmt::format::Writer">Writer</a><'a>) -> Self::<a class="associatedtype" href="../../field/trait.MakeVisitor.html#associatedtype.Visitor" title="type tracing_subscriber::field::MakeVisitor::Visitor">Visitor</a></h4></section></summary><div class='docblock'>Make a new visitor for the provided <code>target</code>.</div></details></div></details><details class="toggle implementors-toggle" open><summary><section id="impl-MakeVisitor%3CWriter%3C'a%3E%3E-for-PrettyFields" class="impl"><a class="src rightside" href="../../../src/tracing_subscriber/fmt/format/pretty.rs.html#387-397">source</a><a href="#impl-MakeVisitor%3CWriter%3C'a%3E%3E-for-PrettyFields" class="anchor">§</a><h3 class="code-header">impl<'a> <a class="trait" href="../../field/trait.MakeVisitor.html" title="trait tracing_subscriber::field::MakeVisitor">MakeVisitor</a><<a class="struct" href="struct.Writer.html" title="struct tracing_subscriber::fmt::format::Writer">Writer</a><'a>> for <a class="struct" href="struct.PrettyFields.html" title="struct tracing_subscriber::fmt::format::PrettyFields">PrettyFields</a></h3></section></summary><div class="impl-items"><details class="toggle" open><summary><section id="associatedtype.Visitor-2" class="associatedtype trait-impl"><a href="#associatedtype.Visitor-2" class="anchor">§</a><h4 class="code-header">type <a href="../../field/trait.MakeVisitor.html#associatedtype.Visitor" class="associatedtype">Visitor</a> = <a class="struct" href="struct.PrettyVisitor.html" title="struct tracing_subscriber::fmt::format::PrettyVisitor">PrettyVisitor</a><'a></h4></section></summary><div class='docblock'>The visitor type produced by this <code>MakeVisitor</code>.</div></details><details class="toggle method-toggle" open><summary><section id="method.make_visitor-2" class="method trait-impl"><a class="src rightside" href="../../../src/tracing_subscriber/fmt/format/pretty.rs.html#391-396">source</a><a href="#method.make_visitor-2" class="anchor">§</a><h4 class="code-header">fn <a href="../../field/trait.MakeVisitor.html#tymethod.make_visitor" class="fn">make_visitor</a>(&self, target: <a class="struct" href="struct.Writer.html" title
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succeeded. <a href="https://doc.rust-lang.org/1.76.0/core/fmt/trait.Write.html#tymethod.write_str">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.write_char-1" class="method trait-impl"><a class="src rightside" href="../../../src/tracing_subscriber/fmt/format/mod.rs.html#568-570">source</a><a href="#method.write_char-1" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/fmt/trait.Write.html#method.write_char" class="fn">write_char</a>(&mut self, c: <a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.char.html">char</a>) -> <a class="type" href="https://doc.rust-lang.org/1.76.0/core/fmt/type.Result.html" title="type core::fmt::Result">Result</a></h4></section></summary><div class='docblock'>Writes a <a href="https://doc.rust-lang.org/1.76.0/std/primitive.char.html" title="primitive char"><code>char</code></a> into this writer, returning whether the write succeeded. <a href="https://doc.rust-lang.org/1.76.0/core/fmt/trait.Write.html#method.write_char">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.write_fmt-1" class="method trait-impl"><a class="src rightside" href="../../../src/tracing_subscriber/fmt/format/mod.rs.html#573-575">source</a><a href="#method.write_fmt-1" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/fmt/trait.Write.html#method.write_fmt" class="fn">write_fmt</a>(&mut self, args: <a class="struct" href="https://doc.rust-lang.org/1.76.0/core/fmt/struct.Arguments.html" title="struct core::fmt::Arguments">Arguments</a><'_>) -> <a class="type" href="https://doc.rust-lang.org/1.76.0/core/fmt/type.Result.html" title="type core::fmt::Result">Result</a></h4></section></summary><div class='docblock'>Glue for usage of the <a href="https://doc.rust-lang.org/1.76.0/core/macro.write.html" title="macro core::write"><code>write!</code></a> macro with implementors of this trait. <a href="https://doc.rust-lang.org/1.76.0/core/fmt/trait.Write.html#method.write_fmt">Read more</a></div></details></div></details></div><h2 id="synthetic-implementations" class="section-header">Auto Trait Implementations<a href="#synthetic-implementations" class="anchor">§</a></h2><div id="synthetic-implementations-list"><section id="impl-RefUnwindSafe-for-Writer%3C'writer%3E" class="impl"><a href="#impl-RefUnwindSafe-for-Writer%3C'writer%3E" class="anchor">§</a><h3 class="code-header">impl<'writer> !<a class="trait" href="https://doc.rust-lang.org/1.76.0/core/panic/unwind_safe/trait.RefUnwindSafe.html" title="trait core::panic::unwind_safe::RefUnwindSafe">RefUnwindSafe</a> for <a class="struct" href="struct.Writer.html" title="struct tracing_subscriber::fmt::format::Writer">Writer</a><'writer></h3></section><section id="impl-Send-for-Writer%3C'writer%3E" class="impl"><a href="#impl-Send-for-Writer%3C'writer%3E" class="anchor">§</a><h3 class="code-header">impl<'writer> !<a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> for <a class="struct" href="struct.Writer.html" title="struct tracing_subscriber::fmt::format::Writer">Writer</a><'writer></h3></section><section id="impl-Sync-for-Writer%3C'writer%3E" class="impl"><a href="#impl-Sync-for-Writer%3C'writer%3E" class="anchor">§</a><h3 class="code-header">impl<'writer> !<a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a> for <a class="struct" href="struct.Writer.html" title="struct tracing_subscriber::fmt::format::Writer">Writer</a><'writer></h3></section><section id="impl-Unpin-for-Writer%3C'writer%3E" class="impl"><a href="#impl-Unpin-for-Writer%3C'writer%3E" class="anchor">§</a><h3 class="code-header">impl<'writer> <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a> for <a class="struct" hre
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T: 'static + ?<a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.type_id" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/any.rs.html#141">source</a><a href="#method.type_id" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/any/trait.Any.html#tymethod.type_id" class="fn">type_id</a>(&self) -> <a class="struct" href="https://doc.rust-lang.org/1.76.0/core/any/struct.TypeId.html" title="struct core::any::TypeId">TypeId</a></h4></section></summary><div class='docblock'>Gets the <code>TypeId</code> of <code>self</code>. <a href="https://doc.rust-lang.org/1.76.0/core/any/trait.Any.html#tymethod.type_id">Read more</a></div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-Borrow%3CT%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/borrow.rs.html#208">source</a><a href="#impl-Borrow%3CT%3E-for-T" class="anchor">§</a><h3 class="code-header">impl<T> <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/borrow/trait.Borrow.html" title="trait core::borrow::Borrow">Borrow</a><T> for T<div class="where">where
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T: ?<a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.borrow" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/borrow.rs.html#210">source</a><a href="#method.borrow" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/borrow/trait.Borrow.html#tymethod.borrow" class="fn">borrow</a>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.reference.html">&T</a></h4></section></summary><div class='docblock'>Immutably borrows from an owned value. <a href="https://doc.rust-lang.org/1.76.0/core/borrow/trait.Borrow.html#tymethod.borrow">Read more</a></div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-BorrowMut%3CT%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/borrow.rs.html#216">source</a><a href="#impl-BorrowMut%3CT%3E-for-T" class="anchor">§</a><h3 class="code-header">impl<T> <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/borrow/trait.BorrowMut.html" title="trait core::borrow::BorrowMut">BorrowMut</a><T> for T<div class="where">where
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T: ?<a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.borrow_mut" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/borrow.rs.html#217">source</a><a href="#method.borrow_mut" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/borrow/trait.BorrowMut.html#tymethod.borrow_mut" class="fn">borrow_mut</a>(&mut self) -> <a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.reference.html">&mut T</a></h4></section></summary><div class='docblock'>Mutably borrows from an owned value. <a href="https://doc.rust-lang.org/1.76.0/core/borrow/trait.BorrowMut.html#tymethod.borrow_mut">Read more</a></div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-From%3CT%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/convert/mod.rs.html#763">source</a><a href="#impl-From%3CT%3E-for-T" class="anchor">§</a><h3 class="code-header">impl<T> <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.From.html" title="trait core::convert::From">From</a><T> for T</h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.from" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/convert/mod.rs.html#766">source</a><a href="#method.from" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/convert/trait.From.html#tymethod.from" class="fn">from</a>(t: T) -> T</h4></section></summary><div class="docblock"><p>Returns the argument unchanged.</p>
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</div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-Instrument-for-T" class="impl"><a class="src rightside" href="../../../src/tracing/instrument.rs.html#325">source</a><a href="#impl-Instrument-for-T" class="anchor">§</a><h3 class="code-header">impl<T> <a class="trait" href="../../../tracing/instrument/trait.Instrument.html" title="trait tracing::instrument::Instrument">Instrument</a> for T</h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.instrument" class="method trait-impl"><a class="src rightside" href="../../../src/tracing/instrument.rs.html#86">source</a><a href="#method.instrument" class="anchor">§</a><h4 class="code-header">fn <a href="../../../tracing/instrument/trait.Instrument.html#method.instrument" class="fn">instrument</a>(self, span: <a class="struct" href="../../../tracing/span/struct.Span.html" title="struct tracing::span::Span">Span</a>) -> <a class="struct" href="../../../tracing/instrument/struct.Instrumented.html" title="struct tracing::instrument::Instrumented">Instrumented</a><Self></h4></section></summary><div class='docblock'>Instruments this type with the provided <a href="../../../tracing/span/struct.Span.html" title="struct tracing::span::Span"><code>Span</code></a>, returning an
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<code>Instrumented</code> wrapper. <a href="../../../tracing/instrument/trait.Instrument.html#method.instrument">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.in_current_span" class="method trait-impl"><a class="src rightside" href="../../../src/tracing/instrument.rs.html#128">source</a><a href="#method.in_current_span" class="anchor">§</a><h4 class="code-header">fn <a href="../../../tracing/instrument/trait.Instrument.html#method.in_current_span" class="fn">in_current_span</a>(self) -> <a class="struct" href="../../../tracing/instrument/struct.Instrumented.html" title="struct tracing::instrument::Instrumented">Instrumented</a><Self></h4></section></summary><div class='docblock'>Instruments this type with the <a href="../../../tracing/span/struct.Span.html#method.current" title="associated function tracing::span::Span::current">current</a> <a href="../../../tracing/span/struct.Span.html" title="struct tracing::span::Span"><code>Span</code></a>, returning an
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<code>Instrumented</code> wrapper. <a href="../../../tracing/instrument/trait.Instrument.html#method.in_current_span">Read more</a></div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-Into%3CU%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/convert/mod.rs.html#747-749">source</a><a href="#impl-Into%3CU%3E-for-T" class="anchor">§</a><h3 class="code-header">impl<T, U> <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a><U> for T<div class="where">where
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U: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.From.html" title="trait core::convert::From">From</a><T>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.into" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/convert/mod.rs.html#756">source</a><a href="#method.into" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/convert/trait.Into.html#tymethod.into" class="fn">into</a>(self) -> U</h4></section></summary><div class="docblock"><p>Calls <code>U::from(self)</code>.</p>
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<p>That is, this conversion is whatever the implementation of
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<code><a href="https://doc.rust-lang.org/1.76.0/core/convert/trait.From.html" title="trait core::convert::From">From</a><T> for U</code> chooses to do.</p>
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</div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-TryFrom%3CU%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/convert/mod.rs.html#803-805">source</a><a href="#impl-TryFrom%3CU%3E-for-T" class="anchor">§</a><h3 class="code-header">impl<T, U> <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><U> for T<div class="where">where
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U: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a><T>,</div></h3></section></summary><div class="impl-items"><details class="toggle" open><summary><section id="associatedtype.Error" class="associatedtype trait-impl"><a href="#associatedtype.Error" class="anchor">§</a><h4 class="code-header">type <a href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html#associatedtype.Error" class="associatedtype">Error</a> = <a class="enum" href="https://doc.rust-lang.org/1.76.0/core/convert/enum.Infallible.html" title="enum core::convert::Infallible">Infallible</a></h4></section></summary><div class='docblock'>The type returned in the event of a conversion error.</div></details><details class="toggle method-toggle" open><summary><section id="method.try_from" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/convert/mod.rs.html#810">source</a><a href="#method.try_from" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html#tymethod.try_from" class="fn">try_from</a>(value: U) -> <a class="enum" href="https://doc.rust-lang.org/1.76.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a><T, <T as <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><U>>::<a class="associatedtype" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a>></h4></section></summary><div class='docblock'>Performs the conversion.</div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-TryInto%3CU%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/convert/mod.rs.html#788-790">source</a><a href="#impl-TryInto%3CU%3E-for-T" class="anchor">§</a><h3 class="code-header">impl<T, U> <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryInto.html" title="trait core::convert::TryInto">TryInto</a><U> for T<div class="where">where
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U: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><T>,</div></h3></section></summary><div class="impl-items"><details class="toggle" open><summary><section id="associatedtype.Error-1" class="associatedtype trait-impl"><a href="#associatedtype.Error-1" class="anchor">§</a><h4 class="code-header">type <a href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryInto.html#associatedtype.Error" class="associatedtype">Error</a> = <U as <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><T>>::<a class="associatedtype" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a></h4></section></summary><div class='docblock'>The type returned in the event of a conversion error.</div></details><details class="toggle method-toggle" open><summary><section id="method.try_into" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/convert/mod.rs.html#795">source</a><a href="#method.try_into" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryInto.html#tymethod.try_into" class="fn">try_into</a>(self) -> <a class="enum" href="https://doc.rust-lang.org/1.76.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a><U, <U as <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><T>>::<a class="associatedtype" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a>></h4></section></summary><div class='docblock'>Performs the conversion.</div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-WithSubscriber-for-T" class="impl"><a class="src rightside" href="../../../src/tracing/instrument.rs.html#393">source</a><a href="#impl-WithSubscriber-for-T" class="anchor">§</a><h3 class="code-header">impl<T> <a class="trait" href="../../../tracing/instrument/trait.WithSubscriber.html" title="trait tracing::instrument::WithSubscriber">WithSubscriber</a> for T</h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.with_subscriber" class="method trait-impl"><a class="src rightside" href="../../../src/tracing/instrument.rs.html#176-178">source</a><a href="#method.with_subscriber" class="anchor">§</a><h4 class="code-header">fn <a href="../../../tracing/instrument/trait.WithSubscriber.html#method.with_subscriber" class="fn">with_subscriber</a><S>(self, subscriber: S) -> <a class="struct" href="../../../tracing/instrument/struct.WithDispatch.html" title="struct tracing::instrument::WithDispatch">WithDispatch</a><Self><div class="where">where
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S: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a><<a class="struct" href="../../../tracing_core/dispatcher/struct.Dispatch.html" title="struct tracing_core::dispatcher::Dispatch">Dispatch</a>>,</div></h4></section></summary><div class='docblock'>Attaches the provided <a href="../../../tracing_core/subscriber/trait.Subscriber.html" title="trait tracing_core::subscriber::Subscriber"><code>Subscriber</code></a> to this type, returning a
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<a href="../../../tracing/instrument/struct.WithDispatch.html" title="struct tracing::instrument::WithDispatch"><code>WithDispatch</code></a> wrapper. <a href="../../../tracing/instrument/trait.WithSubscriber.html#method.with_subscriber">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.with_current_subscriber" class="method trait-impl"><a class="src rightside" href="../../../src/tracing/instrument.rs.html#228">source</a><a href="#method.with_current_subscriber" class="anchor">§</a><h4 class="code-header">fn <a href="../../../tracing/instrument/trait.WithSubscriber.html#method.with_current_subscriber" class="fn">with_current_subscriber</a>(self) -> <a class="struct" href="../../../tracing/instrument/struct.WithDispatch.html" title="struct tracing::instrument::WithDispatch">WithDispatch</a><Self></h4></section></summary><div class='docblock'>Attaches the current <a href="../../../tracing/dispatcher/index.html#setting-the-default-subscriber" title="mod tracing::dispatcher">default</a> <a href="../../../tracing_core/subscriber/trait.Subscriber.html" title="trait tracing_core::subscriber::Subscriber"><code>Subscriber</code></a> to this type, returning a
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<a href="../../../tracing/instrument/struct.WithDispatch.html" title="struct tracing::instrument::WithDispatch"><code>WithDispatch</code></a> wrapper. <a href="../../../tracing/instrument/trait.WithSubscriber.html#method.with_current_subscriber">Read more</a></div></details></div></details></div></section></div></main></body></html>
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