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<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="API documentation for the Rust `subscriber` mod in crate `tracing`."><meta name="keywords" content="rust, rustlang, rust-lang, subscriber"><title>tracing::subscriber - Rust</title><link rel="stylesheet" type="text/css" href="../../normalize.css"><link rel="stylesheet" type="text/css" href="../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../../light.css" id="themeStyle"><link rel="stylesheet" type="text/css" href="../../dark.css" disabled ><link rel="stylesheet" type="text/css" href="../../ayu.css" disabled ><script id="default-settings"></script><script src="../../storage.js"></script><noscript><link rel="stylesheet" href="../../noscript.css"></noscript><link rel="icon" type="image/svg+xml" href="../../favicon.svg">
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<link rel="alternate icon" type="image/png" href="../../favicon-32x32.png"><style type="text/css">#crate-search{background-image:url("../../down-arrow.svg");}</style></head><body class="rustdoc mod"><!--[if lte IE 8]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu">&#9776;</div><a href='../../tracing/index.html'><div class='logo-container'><img src='https://raw.githubusercontent.com/tokio-rs/tracing/master/assets/logo-type.png' alt='logo'></div></a><p class="location">Module subscriber</p><div class="sidebar-elems"><div class="block items"><ul><li><a href="#structs">Structs</a></li><li><a href="#traits">Traits</a></li><li><a href="#functions">Functions</a></li></ul></div><p class="location"><a href="../index.html">tracing</a></p><div id="sidebar-vars" data-name="subscriber" data-ty="mod" data-relpath="../"></div><script defer src="../sidebar-items.js"></script></div></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!" aria-haspopup="menu"><img src="../../brush.svg" width="18" alt="Pick another theme!"></button><div id="theme-choices" role="menu"></div></div><script src="../../theme.js"></script><nav class="sub"><form class="search-form"><div class="search-container"><div><select id="crate-search"><option value="All crates">All crates</option></select><input class="search-input" name="search" disabled autocomplete="off" spellcheck="false" placeholder="Click or press S to search, ? for more options…" type="search"></div><button type="button" class="help-button">?</button>
<a id="settings-menu" href="../../settings.html"><img src="../../wheel.svg" width="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><h1 class="fqn"><span class="in-band">Module <a href="../index.html">tracing</a>::<wbr><a class="mod" href="">subscriber</a></span><span class="out-of-band"><span id="render-detail"><a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class="inner">&#x2212;</span>]</a></span><a class="srclink" href="../../src/tracing/subscriber.rs.html#1-68" title="goto source code">[src]</a></span></h1><div class="docblock"><p>Collects and records trace data.</p>
</div><h2 id="structs" class="section-header"><a href="#structs">Structs</a></h2>
<table><tr class="module-item"><td><a class="struct" href="struct.DefaultGuard.html" title="tracing::subscriber::DefaultGuard struct">DefaultGuard</a></td><td class="docblock-short"><p>A guard that resets the current default dispatcher to the prior
default dispatcher when dropped.</p>
</td></tr><tr class="module-item"><td><a class="struct" href="struct.Interest.html" title="tracing::subscriber::Interest struct">Interest</a></td><td class="docblock-short"><p>Indicates a <a href="../trait.Subscriber.html"><code>Subscriber</code></a>'s interest in a particular callsite.</p>
</td></tr><tr class="module-item"><td><a class="struct" href="struct.SetGlobalDefaultError.html" title="tracing::subscriber::SetGlobalDefaultError struct">SetGlobalDefaultError</a></td><td class="docblock-short"><p>Returned if setting the global dispatcher fails.</p>
</td></tr></table><h2 id="traits" class="section-header"><a href="#traits">Traits</a></h2>
<table><tr class="module-item"><td><a class="trait" href="trait.Subscriber.html" title="tracing::subscriber::Subscriber trait">Subscriber</a></td><td class="docblock-short"><p>Trait representing the functions required to collect trace data.</p>
</td></tr></table><h2 id="functions" class="section-header"><a href="#functions">Functions</a></h2>
<table><tr class="module-item"><td><a class="fn" href="fn.set_default.html" title="tracing::subscriber::set_default fn">set_default</a></td><td class="docblock-short"><p>Sets the subscriber as the default for the duration of the lifetime of the
returned <a href="../dispatcher/struct.DefaultGuard.html"><code>DefaultGuard</code></a></p>
</td></tr><tr class="module-item"><td><a class="fn" href="fn.set_global_default.html" title="tracing::subscriber::set_global_default fn">set_global_default</a></td><td class="docblock-short"><p>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>.)</p>
</td></tr><tr class="module-item"><td><a class="fn" href="fn.with_default.html" title="tracing::subscriber::with_default fn">with_default</a></td><td class="docblock-short"><p>Sets this subscriber as the default for the duration of a closure.</p>
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