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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="Extension trait providing `MakeVisitor` combinators."><title>MakeExt in tracing_subscriber::field - Rust</title><script> if (window.location.protocol !== "file:") document.write(`<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">`)</script><link rel="stylesheet" href="../../static.files/normalize-76eba96aa4d2e634.css"><link rel="stylesheet" href="../../static.files/rustdoc-e935ef01ae1c1829.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="1.78.0 (9b00956e5 2024-04-29)" data-channel="1.78.0" data-search-js="search-42d8da7a6b9792c2.js" data-settings-js="settings-4313503d2e1961c2.js" ><script src="../../static.files/storage-4c98445ec4002617.js"></script><script defer src="sidebar-items.js"></script><script defer src="../../static.files/main-12cf3b4f4f9dc36d.js"></script><noscript><link rel="stylesheet" href="../../static.files/noscript-04d5337699b92874.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 trait"><!--[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" title="show sidebar"></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="#">MakeExt</a></h2><div class="sidebar-elems"><section><h3><a href="#provided-methods">Provided Methods</a></h3><ul class="block"><li><a href="#method.debug_alt">debug_alt</a></li><li><a href="#method.delimited">delimited</a></li><li><a href="#method.display_messages">display_messages</a></li></ul><h3><a href="#object-safety">Object Safety</a></h3><h3><a href="#implementors">Implementors</a></h3></section><h2><a href="index.html">In tracing_subscriber::field</a></h2></div></nav><div class="sidebar-resizer"></div>
<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>Trait <a href="../index.html">tracing_subscriber</a>::<wbr><a href="index.html">field</a>::<wbr><a class="trait" href="#">MakeExt</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/field/mod.rs.html#130-156">source</a> · <button id="toggle-all-docs" title="collapse all docs">[<span>&#x2212;</span>]</button></span></div><pre class="rust item-decl"><code>pub trait MakeExt&lt;T&gt;<div class="where">where
Self: <a class="trait" href="trait.MakeVisitor.html" title="trait tracing_subscriber::field::MakeVisitor">MakeVisitor</a>&lt;T&gt; + <a class="trait" href="https://doc.rust-lang.org/1.78.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + Sealed&lt;MakeExtMarker&lt;T&gt;&gt;,</div>{
// Provided methods
fn <a href="#method.debug_alt" class="fn">debug_alt</a>(self) -&gt; <a class="struct" href="debug/struct.Alt.html" title="struct tracing_subscriber::field::debug::Alt">Alt</a>&lt;Self&gt; { ... }
<span class="item-spacer"></span> fn <a href="#method.display_messages" class="fn">display_messages</a>(self) -&gt; <a class="struct" href="display/struct.Messages.html" title="struct tracing_subscriber::field::display::Messages">Messages</a>&lt;Self&gt; { ... }
<span class="item-spacer"></span> fn <a href="#method.delimited" class="fn">delimited</a>&lt;D&gt;(self, delimiter: D) -&gt; <a class="struct" href="delimited/struct.Delimited.html" title="struct tracing_subscriber::field::delimited::Delimited">Delimited</a>&lt;D, Self&gt;
<span class="where">where D: <a class="trait" href="https://doc.rust-lang.org/1.78.0/core/convert/trait.AsRef.html" title="trait core::convert::AsRef">AsRef</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.78.0/std/primitive.str.html">str</a>&gt; + <a class="trait" href="https://doc.rust-lang.org/1.78.0/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a>,
Self::<a class="associatedtype" href="trait.MakeVisitor.html#associatedtype.Visitor" title="type tracing_subscriber::field::MakeVisitor::Visitor">Visitor</a>: <a class="trait" href="trait.VisitFmt.html" title="trait tracing_subscriber::field::VisitFmt">VisitFmt</a></span> { ... }
}</code></pre><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>Extension trait providing <code>MakeVisitor</code> combinators.</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.debug_alt" class="method"><a class="src rightside" href="../../src/tracing_subscriber/field/mod.rs.html#137-139">source</a><h4 class="code-header">fn <a href="#method.debug_alt" class="fn">debug_alt</a>(self) -&gt; <a class="struct" href="debug/struct.Alt.html" title="struct tracing_subscriber::field::debug::Alt">Alt</a>&lt;Self&gt;</h4></section></summary><div class="docblock"><p>Wraps <code>self</code> so that any <code>fmt::Debug</code> fields are recorded using the
alternate formatter (<code>{:#?}</code>).</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.display_messages" class="method"><a class="src rightside" href="../../src/tracing_subscriber/field/mod.rs.html#143-145">source</a><h4 class="code-header">fn <a href="#method.display_messages" class="fn">display_messages</a>(self) -&gt; <a class="struct" href="display/struct.Messages.html" title="struct tracing_subscriber::field::display::Messages">Messages</a>&lt;Self&gt;</h4></section></summary><div class="docblock"><p>Wraps <code>self</code> so that any string fields named “message” are recorded
using <code>fmt::Display</code>.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.delimited" class="method"><a class="src rightside" href="../../src/tracing_subscriber/field/mod.rs.html#149-155">source</a><h4 class="code-header">fn <a href="#method.delimited" class="fn">delimited</a>&lt;D&gt;(self, delimiter: D) -&gt; <a class="struct" href="delimited/struct.Delimited.html" title="struct tracing_subscriber::field::delimited::Delimited">Delimited</a>&lt;D, Self&gt;<div class="where">where
D: <a class="trait" href="https://doc.rust-lang.org/1.78.0/core/convert/trait.AsRef.html" title="trait core::convert::AsRef">AsRef</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.78.0/std/primitive.str.html">str</a>&gt; + <a class="trait" href="https://doc.rust-lang.org/1.78.0/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a>,
Self::<a class="associatedtype" href="trait.MakeVisitor.html#associatedtype.Visitor" title="type tracing_subscriber::field::MakeVisitor::Visitor">Visitor</a>: <a class="trait" href="trait.VisitFmt.html" title="trait tracing_subscriber::field::VisitFmt">VisitFmt</a>,</div></h4></section></summary><div class="docblock"><p>Wraps <code>self</code> so that when fields are formatted to a writer, they are
separated by the provided <code>delimiter</code>.</p>
</div></details></div><h2 id="object-safety" class="section-header">Object Safety<a href="#object-safety" class="anchor">§</a></h2><div class="object-safety-info">This trait is <b>not</b> <a href="https://doc.rust-lang.org/1.78.0/reference/items/traits.html#object-safety">object safe</a>.</div><h2 id="implementors" class="section-header">Implementors<a href="#implementors" class="anchor">§</a></h2><div id="implementors-list"><section id="impl-MakeExt%3CT%3E-for-M" class="impl"><a class="src rightside" href="../../src/tracing_subscriber/field/mod.rs.html#220-225">source</a><a href="#impl-MakeExt%3CT%3E-for-M" class="anchor">§</a><h3 class="code-header">impl&lt;T, M&gt; <a class="trait" href="trait.MakeExt.html" title="trait tracing_subscriber::field::MakeExt">MakeExt</a>&lt;T&gt; for M<div class="where">where
M: <a class="trait" href="trait.MakeVisitor.html" title="trait tracing_subscriber::field::MakeVisitor">MakeVisitor</a>&lt;T&gt; + <a class="trait" href="https://doc.rust-lang.org/1.78.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + Sealed&lt;MakeExtMarker&lt;T&gt;&gt;,</div></h3></section></div><script src="../../trait.impl/tracing_subscriber/field/trait.MakeExt.js" async></script></section></div></main></body></html>