Uttarayan Mondal
17 lines
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17 lines
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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="Sets this dispatch as the global default for the duration of the entire program. Will be used as a fallback if no thread-local dispatch has been set in a thread (using `with_default`.)"><meta name="keywords" content="rust, rustlang, rust-lang, set_global_default"><title>tracing::dispatcher::set_global_default - 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 fn"><!--[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">☰</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><div class="sidebar-elems"><p class="location"><a href="../index.html">tracing</a>::<wbr><a href="index.html">dispatcher</a></p><div id="sidebar-vars" data-name="set_global_default" data-ty="fn" 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>
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<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">Function <a href="../index.html">tracing</a>::<wbr><a href="index.html">dispatcher</a>::<wbr><a class="fn" href="">set_global_default</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">−</span>]</a></span><a class="srclink" href="../../src/tracing_core/dispatcher.rs.html#282" title="goto source code">[src]</a></span></h1><pre class="rust fn">pub fn set_global_default(<br> dispatcher: <a class="struct" href="../../tracing/struct.Dispatch.html" title="struct tracing::Dispatch">Dispatch</a><br>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, <a class="struct" href="../../tracing/subscriber/struct.SetGlobalDefaultError.html" title="struct tracing::subscriber::SetGlobalDefaultError">SetGlobalDefaultError</a>></pre><div class="docblock"><p>Sets this dispatch as the global default for the duration of the entire program.
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Will be used as a fallback if no thread-local dispatch has been set in a thread
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(using <code>with_default</code>.)</p>
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<p>Can only be set once; subsequent attempts to set the global default will fail.
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Returns <code>Err</code> if the global default has already been set.</p>
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<div class="information">
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<div class="tooltip compile_fail" style="">⚠ ️<span class="tooltiptext">Warning</span></div>
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</div><div class="example-wrap" style="display:inline-block"><pre class="compile_fail" style="white-space:normal;font:inherit;">
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<strong>Warning</strong>: In general, libraries should <em>not</em> call
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<code>set_global_default()</code>! Doing so will cause conflicts when
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executables that depend on the library try to set the default later.
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</pre></div>
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