struct.EnvFilter.html
Encoded payload detected: urlEncoded payload detected: xor
SHA-256d8185ab8ed7c63d083ee8d61488354b6868cebe63167cdaa4fb939460cb9a9ad
URLhttps://docs.rs/tracing-subscriber/latest/tracing_subscriber/filter/struct.EnvFilter.html#directives
MaleculeO(C)H(Cm)Md
Evidence
1<!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 `Layer` which filters spans and events based on a set of filter directives."><title>EnvFilter in tracing_subscriber::filter - Rust</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-6b053e98.ttf.woff2,FiraSans-Italic-81dc35de.woff2,FiraSans-Regular-0fe48ade.woff2,FiraSans-MediumItalic-ccf7e434.woff2,FiraSans-Medium-e1aa3f0a.woff2,SourceCodePro-Regular-8badfe75.ttf.woff2,SourceCodePro-Semibold-aa29a496.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2"href="/-/rustdoc.static/${f}">`).join(""))</script><link rel="stylesheet" href="/-/rustdoc.static/normalize-9960930a.css"><link rel="stylesheet" href="/-/static/vendored.css?0-0-0-886bc7a22b1adc4b387ce1343447fe3af98d9ce5-2026-06-14" media="all" /><link rel="styleshee
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19 window.addEventListener("message", ev => {
20 if (ev.data && ev.data.storage && ev.data.storage.key === "rustdoc-theme") {
21 applyTheme(ev.data.storage.value);
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434<iframe src="/-/storage-change-detection.html" width="0" height="0" style="display: none"></iframe><a class="skip-main-content" href="#main-content">Skip to main content</a><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><rustdoc-topbar><h2><a href="#">EnvFilter</a></h2></rustdoc-topbar><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/main/assets/logo-type.png" alt="logo"></a><h2><a href="../../tracing_subscriber/index.html">tracing_<wbr>subscriber</a><span class="version">0.3.23</span></h2></div><div class="sidebar-elems"><section id="rustdoc-toc"><h2 class="location"><a href="#">EnvFilter</a></h2><h3><a href="#">Sections</a></h3><ul class="block top-toc"><li><a href="#directives" title="Directives">Directives</a><ul><li><a href="#usage-notes" title="Usage Notes">Usage Notes</a></li><li><a href="#ex
435directives.</p>
436<p><code>EnvFilter</code> implements both the <a href="#impl-Layer%3CS%3E"><code>Layer</code></a> and <a href="#impl-Filter%3CS%3E"><code>Filter</code></a> traits, so it may
437be used for both <a href="../layer/index.html#global-filtering" title="mod tracing_subscriber::layer">global filtering</a> and <a href="../layer/index.html#per-layer-filtering" title="mod tracing_subscriber::layer">per-layer filtering</a>,
438respectively. See <a href="../layer/index.html#filtering-with-layers" title="mod tracing_subscriber::layer">the documentation on filtering with <code>Layer</code>s</a>
444<h2 id="directives"><a class="doc-anchor" href="#directives">§</a>Directives</h2>
445<p>A filter consists of one or more comma-separated directives which match on <a href="https://docs.rs/tracing-core/0.1.35/x86_64-unknown-linux-gnu/tracing_core/span/index.html" title="mod tracing_core::span"><code>Span</code></a>s and <a href="https://docs.rs/tracing-core/0.1.35/x86_64-unknown-linux-gnu/tracing_core/event/struct.Event.html" title="struct tracing_core::event::Event"><code>Event</code></a>s.
446Each directive may have a corresponding maximum verbosity <a href="https://docs.rs/tracing-core/0.1.35/x86_64-unknown-linux-gnu/tracing_core/metadata/struct.Level.html" title="struct tracing_core::metadata::Level"><code>level</code></a> which
447enables (e.g., <em>selects for</em>) spans and events that match. Like <code>log</code>,
448<code>tracing</code> considers less exclusive levels (like <code>trace</code> or <code>info</code>) to be more