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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="Collects and records trace data."><title>tracing::subscriber - Rust</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-46f98efaafac5295.ttf.woff2,FiraSans-Regular-018c141bf0843ffd.woff2,FiraSans-Medium-8f9a781e4970d388.woff2,SourceCodePro-Regular-562dcc5011b6de7d.ttf.woff2,SourceCodePro-Semibold-d899c5a5c4aeb14a.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../../static.files/normalize-76eba96aa4d2e634.css"><link rel="stylesheet" href="../../static.files/rustdoc-dd39b87e5fcfba68.css"><meta name="rustdoc-vars" data-root-path="../../" data-static-root-path="../../static.files/" data-current-crate="tracing" data-themes="" data-resource-suffix="" data-rustdoc-version="1.80.0 (051478957 2024-07-21)" data-channel="1.80.0" data-search-js="search-d52510db62a78183.js" data-settings-js="settings-4313503d2e1961c2.js" ><script src="../../static.files/storage-118b08c4c78b968e.js"></script><script defer src="../sidebar-items.js"></script><script defer src="../../static.files/main-20a3ad099b048cf2.js"></script><noscript><link rel="stylesheet" href="../../static.files/noscript-df360f571f6edeae.css"></noscript><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 mod"><!--[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/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/index.html"><img src="https://raw.githubusercontent.com/tokio-rs/tracing/master/assets/logo-type.png" alt="logo"></a><h2><a href="../../tracing/index.html">tracing</a><span class="version">0.1.40</span></h2></div><h2 class="location"><a href="#">Module subscriber</a></h2><div class="sidebar-elems"><section><ul class="block"><li><a href="#structs">Structs</a></li><li><a href="#traits">Traits</a></li><li><a href="#functions">Functions</a></li></ul></section><h2><a href="../index.html">In crate tracing</a></h2></div></nav><div class="sidebar-resizer"></div><main><div class="width-limiter"><rustdoc-search></rustdoc-search><section id="main-content" class="content"><div class="main-heading"><h1>Module <a href="../index.html">tracing</a>::<wbr><a class="mod" href="#">subscriber</a><button id="copy-path" title="Copy item path to clipboard">Copy item path</button></h1><span class="out-of-band"><a class="src" href="../../src/tracing/subscriber.rs.html#1-65">source</a> · <button id="toggle-all-docs" title="collapse all docs">[<span>&#x2212;</span>]</button></span></div><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>Collects and records trace data.</p>
</div></details><h2 id="structs" class="section-header">Structs<a href="#structs" class="anchor">§</a></h2><ul class="item-table"><li><div class="item-name"><a class="struct" href="struct.DefaultGuard.html" title="struct tracing::subscriber::DefaultGuard">DefaultGuard</a></div><div class="desc docblock-short">A guard that resets the current default dispatcher to the prior
default dispatcher when dropped.</div></li><li><div class="item-name"><a class="struct" href="struct.Interest.html" title="struct tracing::subscriber::Interest">Interest</a></div><div class="desc docblock-short">Indicates a <a href="../trait.Subscriber.html" title="trait tracing::Subscriber"><code>Subscriber</code></a>s interest in a particular callsite.</div></li><li><div class="item-name"><a class="struct" href="struct.NoSubscriber.html" title="struct tracing::subscriber::NoSubscriber">NoSubscriber</a></div><div class="desc docblock-short">A no-op <a href="../trait.Subscriber.html" title="trait tracing::Subscriber"><code>Subscriber</code></a>.</div></li><li><div class="item-name"><a class="struct" href="struct.SetGlobalDefaultError.html" title="struct tracing::subscriber::SetGlobalDefaultError">SetGlobalDefaultError</a></div><div class="desc docblock-short">Returned if setting the global dispatcher fails.</div></li></ul><h2 id="traits" class="section-header">Traits<a href="#traits" class="anchor">§</a></h2><ul class="item-table"><li><div class="item-name"><a class="trait" href="trait.Subscriber.html" title="trait tracing::subscriber::Subscriber">Subscriber</a></div><div class="desc docblock-short">Trait representing the functions required to collect trace data.</div></li></ul><h2 id="functions" class="section-header">Functions<a href="#functions" class="anchor">§</a></h2><ul class="item-table"><li><div class="item-name"><a class="fn" href="fn.set_default.html" title="fn tracing::subscriber::set_default">set_default</a></div><div class="desc docblock-short">Sets the <a href="../trait.Subscriber.html" title="trait tracing::Subscriber"><code>Subscriber</code></a> as the default for the current thread for the
duration of the lifetime of the returned <a href="struct.DefaultGuard.html" title="struct tracing::subscriber::DefaultGuard"><code>DefaultGuard</code></a>.</div></li><li><div class="item-name"><a class="fn" href="fn.set_global_default.html" title="fn tracing::subscriber::set_global_default">set_global_default</a></div><div class="desc docblock-short">Sets this subscriber as the global default for the duration of the entire program.
Will be used as a fallback if no thread-local subscriber has been set in a thread (using <code>with_default</code>.)</div></li><li><div class="item-name"><a class="fn" href="fn.with_default.html" title="fn tracing::subscriber::with_default">with_default</a></div><div class="desc docblock-short">Sets this <a href="../trait.Subscriber.html" title="trait tracing::Subscriber"><code>Subscriber</code></a> as the default for the current thread for the
duration of a closure.</div></li></ul></section></div></main></body></html>