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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="A composable handler for `tracing` events."><title>Layer in tracing_subscriber::layer - 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_subscriber" 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 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="#">Layer</a></h2><div class="sidebar-elems"><section><h3><a href="#provided-methods">Provided Methods</a></h3><ul class="block"><li><a href="#method.and_then">and_then</a></li><li><a href="#method.boxed">boxed</a></li><li><a href="#method.enabled">enabled</a></li><li><a href="#method.event_enabled">event_enabled</a></li><li><a href="#method.on_close">on_close</a></li><li><a href="#method.on_enter">on_enter</a></li><li><a href="#method.on_event">on_event</a></li><li><a href="#method.on_exit">on_exit</a></li><li><a href="#method.on_follows_from">on_follows_from</a></li><li><a href="#method.on_id_change">on_id_change</a></li><li><a href="#method.on_layer">on_layer</a></li><li><a href="#method.on_new_span">on_new_span</a></li><li><a href="#method.on_record">on_record</a></li><li><a href="#method.on_register_dispatch">on_register_dispatch</a></li><li><a href="#method.register_callsite">register_callsite</a></li><li><a href="#method.with_filter">with_filter</a></li><li><a href="#method.with_subscriber">with_subscriber</a></li></ul><h3><a href="#foreign-impls">Implementations on Foreign Types</a></h3><ul class="block"><li><a href="#impl-Layer%3CS%3E-for-Box%3CL%3E">Box<L></a></li><li><a href="#impl-Layer%3CS%3E-for-Box%3Cdyn+Layer%3CS%3E+%2B+Send+%2B+Sync%3E">Box<dyn Layer<S> + Send + Sync></a></li><li><a href="#impl-Layer%3CS%3E-for-Option%3CL%3E">Option<L></a></li><li><a href="#impl-Layer%3CS%3E-for-Vec%3CL%3E">Vec<L></a></li></ul><h3><a href="#trait-implementations">Trait Implementations</a></h3><ul class="block trait-implementation"><li><a href="#impl-Layer%3CS%3E-for-Box%3Cdyn+Layer%3CS%3E+%2B+Send+%2B+Sync%3E">Layer<S></a></li></ul><h3><a href="#implementors">Implementors</a></h3></section><h2><a href="index.html">In tracing_subscriber::layer</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>Trait <a href="../index.html">tracing_subscriber</a>::<wbr><a href="index.html">layer</a>::<wbr><a class="trait" href="#">Layer</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/layer/mod.rs.html#727-1251">source</a> · <button id="toggle-all-docs" title="collapse all docs">[<span>−</span>]</button></span></div><pre class="rust item-decl"><code>pub trait Layer<S><div class="where">where
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S: <a class="trait" href="../../tracing_core/subscriber/trait.Subscriber.html" title="trait tracing_core::subscriber::Subscriber">Subscriber</a>,
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Self: 'static,</div>{
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<details class="toggle type-contents-toggle"><summary class="hideme"><span>Show 17 methods</span></summary> // Provided methods
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fn <a href="#method.on_register_dispatch" class="fn">on_register_dispatch</a>(&self, subscriber: &<a class="struct" href="../../tracing_core/dispatcher/struct.Dispatch.html" title="struct tracing_core::dispatcher::Dispatch">Dispatch</a>) { ... }
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<span class="item-spacer"></span> fn <a href="#method.on_layer" class="fn">on_layer</a>(&mut self, subscriber: <a class="primitive" href="https://doc.rust-lang.org/1.80.0/std/primitive.reference.html">&mut S</a>) { ... }
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<span class="item-spacer"></span> fn <a href="#method.register_callsite" class="fn">register_callsite</a>(
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&self,
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metadata: &'static <a class="struct" href="../../tracing_core/metadata/struct.Metadata.html" title="struct tracing_core::metadata::Metadata">Metadata</a><'static>,
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) -> <a class="struct" href="../../tracing_core/subscriber/struct.Interest.html" title="struct tracing_core::subscriber::Interest">Interest</a> { ... }
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<span class="item-spacer"></span> fn <a href="#method.enabled" class="fn">enabled</a>(&self, metadata: &<a class="struct" href="../../tracing_core/metadata/struct.Metadata.html" title="struct tracing_core::metadata::Metadata">Metadata</a><'_>, ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>) -> <a class="primitive" href="https://doc.rust-lang.org/1.80.0/std/primitive.bool.html">bool</a> { ... }
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<span class="item-spacer"></span> fn <a href="#method.on_new_span" class="fn">on_new_span</a>(&self, attrs: &<a class="struct" href="../../tracing_core/span/struct.Attributes.html" title="struct tracing_core::span::Attributes">Attributes</a><'_>, id: &<a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>, ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>) { ... }
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<span class="item-spacer"></span> fn <a href="#method.on_record" class="fn">on_record</a>(&self, _span: &<a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>, _values: &<a class="struct" href="../../tracing_core/span/struct.Record.html" title="struct tracing_core::span::Record">Record</a><'_>, _ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>) { ... }
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<span class="item-spacer"></span> fn <a href="#method.on_follows_from" class="fn">on_follows_from</a>(&self, _span: &<a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>, _follows: &<a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>, _ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>) { ... }
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<span class="item-spacer"></span> fn <a href="#method.event_enabled" class="fn">event_enabled</a>(&self, _event: &<a class="struct" href="../../tracing_core/event/struct.Event.html" title="struct tracing_core::event::Event">Event</a><'_>, _ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>) -> <a class="primitive" href="https://doc.rust-lang.org/1.80.0/std/primitive.bool.html">bool</a> { ... }
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<span class="item-spacer"></span> fn <a href="#method.on_event" class="fn">on_event</a>(&self, _event: &<a class="struct" href="../../tracing_core/event/struct.Event.html" title="struct tracing_core::event::Event">Event</a><'_>, _ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>) { ... }
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<span class="item-spacer"></span> fn <a href="#method.on_enter" class="fn">on_enter</a>(&self, _id: &<a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>, _ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>) { ... }
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<span class="item-spacer"></span> fn <a href="#method.on_exit" class="fn">on_exit</a>(&self, _id: &<a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>, _ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>) { ... }
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<span class="item-spacer"></span> fn <a href="#method.on_close" class="fn">on_close</a>(&self, _id: <a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>, _ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>) { ... }
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<span class="item-spacer"></span> fn <a href="#method.on_id_change" class="fn">on_id_change</a>(&self, _old: &<a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>, _new: &<a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>, _ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>) { ... }
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<span class="item-spacer"></span> fn <a href="#method.and_then" class="fn">and_then</a><L>(self, layer: L) -> <a class="struct" href="struct.Layered.html" title="struct tracing_subscriber::layer::Layered">Layered</a><L, Self, S>
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<span class="where">where L: <a class="trait" href="trait.Layer.html" title="trait tracing_subscriber::layer::Layer">Layer</a><S>,
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Self: <a class="trait" href="https://doc.rust-lang.org/1.80.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a></span> { ... }
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<span class="item-spacer"></span> fn <a href="#method.with_subscriber" class="fn">with_subscriber</a>(self, inner: S) -> <a class="struct" href="struct.Layered.html" title="struct tracing_subscriber::layer::Layered">Layered</a><Self, S>
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<span class="where">where Self: <a class="trait" href="https://doc.rust-lang.org/1.80.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a></span> { ... }
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<span class="item-spacer"></span> fn <a href="#method.with_filter" class="fn">with_filter</a><F>(self, filter: F) -> <a class="struct" href="../filter/struct.Filtered.html" title="struct tracing_subscriber::filter::Filtered">Filtered</a><Self, F, S>
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<span class="where">where Self: <a class="trait" href="https://doc.rust-lang.org/1.80.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,
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F: <a class="trait" href="trait.Filter.html" title="trait tracing_subscriber::layer::Filter">Filter</a><S></span> { ... }
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<span class="item-spacer"></span> fn <a href="#method.boxed" class="fn">boxed</a>(self) -> <a class="struct" href="https://doc.rust-lang.org/1.80.0/alloc/boxed/struct.Box.html" title="struct alloc::boxed::Box">Box</a><dyn <a class="trait" href="trait.Layer.html" title="trait tracing_subscriber::layer::Layer">Layer</a><S> + <a class="trait" href="https://doc.rust-lang.org/1.80.0/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> + <a class="trait" href="https://doc.rust-lang.org/1.80.0/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a> + 'static>
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<span class="where">where Self: <a class="trait" href="https://doc.rust-lang.org/1.80.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="trait.Layer.html" title="trait tracing_subscriber::layer::Layer">Layer</a><S> + <a class="trait" href="https://doc.rust-lang.org/1.80.0/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> + <a class="trait" href="https://doc.rust-lang.org/1.80.0/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a> + 'static,
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S: <a class="trait" href="../../tracing_core/subscriber/trait.Subscriber.html" title="trait tracing_core::subscriber::Subscriber">Subscriber</a></span> { ... }
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</details>}</code></pre><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>A composable handler for <code>tracing</code> events.</p>
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<p>A <code>Layer</code> implements a behavior for recording or collecting traces that can
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be composed together with other <code>Layer</code>s to build a <a href="../../tracing_core/subscriber/trait.Subscriber.html" title="trait tracing_core::subscriber::Subscriber"><code>Subscriber</code></a>. See the
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<a href="index.html" title="mod tracing_subscriber::layer">module-level documentation</a> for details.</p>
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</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.on_register_dispatch" class="method"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#753-755">source</a><h4 class="code-header">fn <a href="#method.on_register_dispatch" class="fn">on_register_dispatch</a>(&self, subscriber: &<a class="struct" href="../../tracing_core/dispatcher/struct.Dispatch.html" title="struct tracing_core::dispatcher::Dispatch">Dispatch</a>)</h4></section></summary><div class="docblock"><p>Performs late initialization when installing this layer as a
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<a href="../../tracing_core/subscriber/trait.Subscriber.html" title="trait tracing_core::subscriber::Subscriber"><code>Subscriber</code></a>.</p>
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<h6 id="avoiding-memory-leaks"><a class="doc-anchor" href="#avoiding-memory-leaks">§</a>Avoiding Memory Leaks</h6>
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<p><code>Layer</code>s should not store the <a href="../../tracing_core/dispatcher/struct.Dispatch.html" title="struct tracing_core::dispatcher::Dispatch"><code>Dispatch</code></a> pointing to the <a href="../../tracing_core/subscriber/trait.Subscriber.html" title="trait tracing_core::subscriber::Subscriber"><code>Subscriber</code></a>
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that they are a part of. Because the <code>Dispatch</code> owns the <code>Subscriber</code>,
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storing the <code>Dispatch</code> within the <code>Subscriber</code> will create a reference
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count cycle, preventing the <code>Dispatch</code> from ever being dropped.</p>
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<p>Instead, when it is necessary to store a cyclical reference to the
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<code>Dispatch</code> within a <code>Layer</code>, use <a href="../../tracing_core/dispatcher/struct.Dispatch.html#method.downgrade" title="method tracing_core::dispatcher::Dispatch::downgrade"><code>Dispatch::downgrade</code></a> to convert a
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<code>Dispatch</code> into a <a href="../../tracing_core/dispatcher/struct.WeakDispatch.html" title="struct tracing_core::dispatcher::WeakDispatch"><code>WeakDispatch</code></a>. This type is analogous to
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<a href="https://doc.rust-lang.org/1.80.0/alloc/sync/struct.Weak.html" title="struct alloc::sync::Weak"><code>std::sync::Weak</code></a>, and does not create a reference count cycle. A
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<a href="../../tracing_core/dispatcher/struct.WeakDispatch.html" title="struct tracing_core::dispatcher::WeakDispatch"><code>WeakDispatch</code></a> can be stored within a subscriber without causing a
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memory leak, and can be <a href="../../tracing_core/dispatcher/struct.WeakDispatch.html#method.upgrade" title="method tracing_core::dispatcher::WeakDispatch::upgrade">upgraded</a> into a <code>Dispatch</code> temporarily when
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the <code>Dispatch</code> must be accessed by the subscriber.</p>
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</div></details><details class="toggle method-toggle" open><summary><section id="method.on_layer" class="method"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#784-786">source</a><h4 class="code-header">fn <a href="#method.on_layer" class="fn">on_layer</a>(&mut self, subscriber: <a class="primitive" href="https://doc.rust-lang.org/1.80.0/std/primitive.reference.html">&mut S</a>)</h4></section></summary><div class="docblock"><p>Performs late initialization when attaching a <code>Layer</code> to a
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<a href="../../tracing_core/subscriber/trait.Subscriber.html" title="trait tracing_core::subscriber::Subscriber"><code>Subscriber</code></a>.</p>
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<p>This is a callback that is called when the <code>Layer</code> is added to a
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<a href="../../tracing_core/subscriber/trait.Subscriber.html" title="trait tracing_core::subscriber::Subscriber"><code>Subscriber</code></a> (e.g. in <a href="trait.Layer.html#method.with_subscriber" title="method tracing_subscriber::layer::Layer::with_subscriber"><code>Layer::with_subscriber</code></a> and
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<a href="trait.SubscriberExt.html#method.with" title="method tracing_subscriber::layer::SubscriberExt::with"><code>SubscriberExt::with</code></a>). Since this can only occur before the
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<a href="../../tracing_core/subscriber/trait.Subscriber.html" title="trait tracing_core::subscriber::Subscriber"><code>Subscriber</code></a> has been set as the default, both the <code>Layer</code> and
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<a href="../../tracing_core/subscriber/trait.Subscriber.html" title="trait tracing_core::subscriber::Subscriber"><code>Subscriber</code></a> are passed to this method <em>mutably</em>. This gives the
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<code>Layer</code> the opportunity to set any of its own fields with values
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recieved by method calls on the <a href="../../tracing_core/subscriber/trait.Subscriber.html" title="trait tracing_core::subscriber::Subscriber"><code>Subscriber</code></a>.</p>
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<p>For example, <a href="../filter/struct.Filtered.html" title="struct tracing_subscriber::filter::Filtered"><code>Filtered</code></a> layers implement <code>on_layer</code> to call the
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<a href="../../tracing_core/subscriber/trait.Subscriber.html" title="trait tracing_core::subscriber::Subscriber"><code>Subscriber</code></a>’s <a href="../registry/trait.LookupSpan.html#method.register_filter" title="method tracing_subscriber::registry::LookupSpan::register_filter"><code>register_filter</code></a> method, and store the returned
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<a href="../filter/struct.FilterId.html" title="struct tracing_subscriber::filter::FilterId"><code>FilterId</code></a> as a field.</p>
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<p><strong>Note</strong> In most cases, <code>Layer</code> implementations will not need to
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implement this method. However, in cases where a type implementing
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<code>Layer</code> wraps one or more other types that implement <code>Layer</code>, like the
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<a href="struct.Layered.html" title="struct tracing_subscriber::layer::Layered"><code>Layered</code></a> and <a href="../filter/struct.Filtered.html" title="struct tracing_subscriber::filter::Filtered"><code>Filtered</code></a> types in this crate, that type MUST ensure
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that the inner <code>Layer</code>s’ <code>on_layer</code> methods are called. Otherwise,
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functionality that relies on <code>on_layer</code>, such as <a href="#per-layer-filtering">per-layer filtering</a>,
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may not work correctly.</p>
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</div></details><details class="toggle method-toggle" open><summary><section id="method.register_callsite" class="method"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#828-834">source</a><h4 class="code-header">fn <a href="#method.register_callsite" class="fn">register_callsite</a>(&self, metadata: &'static <a class="struct" href="../../tracing_core/metadata/struct.Metadata.html" title="struct tracing_core::metadata::Metadata">Metadata</a><'static>) -> <a class="struct" href="../../tracing_core/subscriber/struct.Interest.html" title="struct tracing_core::subscriber::Interest">Interest</a></h4></section></summary><div class="docblock"><p>Registers a new callsite with this layer, returning whether or not
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the layer is interested in being notified about the callsite, similarly
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to <a href="../../tracing_core/subscriber/trait.Subscriber.html#method.register_callsite" title="method tracing_core::subscriber::Subscriber::register_callsite"><code>Subscriber::register_callsite</code></a>.</p>
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<p>By default, this returns <a href="../../tracing_core/subscriber/struct.Interest.html#method.always" title="associated function tracing_core::subscriber::Interest::always"><code>Interest::always()</code></a> if <a href="trait.Layer.html#method.enabled" title="method tracing_subscriber::layer::Layer::enabled"><code>self.enabled</code></a> returns
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true, or <a href="../../tracing_core/subscriber/struct.Interest.html#method.never" title="associated function tracing_core::subscriber::Interest::never"><code>Interest::never()</code></a> if it returns false.</p>
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<pre class="ignore" style="white-space:normal;font:inherit;">
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<strong>Note</strong>: This method (and <a href="#method.enabled">
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<code>Layer::enabled</code></a>) determine whether a span or event is
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globally enabled, <em>not</em> whether the individual layer will be
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notified about that span or event. This is intended to be used
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by layers that implement filtering for the entire stack. Layers which do
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not wish to be notified about certain spans or events but do not wish to
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globally disable them should ignore those spans or events in their
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<a href="#method.on_event"><code>on_event</code></a>,
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<a href="#method.on_enter"><code>on_enter</code></a>,
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<a href="#method.on_exit"><code>on_exit</code></a>, and other notification
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methods.
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</pre>
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<p>See <a href="#filtering-with-layers">the trait-level documentation</a> for more information on filtering
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with <code>Layer</code>s.</p>
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<p>Layers may also implement this method to perform any behaviour that
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should be run once per callsite. If the layer wishes to use
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<code>register_callsite</code> for per-callsite behaviour, but does not want to
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globally enable or disable those callsites, it should always return
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<a href="../../tracing_core/subscriber/struct.Interest.html#method.always" title="associated function tracing_core::subscriber::Interest::always"><code>Interest::always()</code></a>.</p>
|
||
</div></details><details class="toggle method-toggle" open><summary><section id="method.enabled" class="method"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#868-871">source</a><h4 class="code-header">fn <a href="#method.enabled" class="fn">enabled</a>(&self, metadata: &<a class="struct" href="../../tracing_core/metadata/struct.Metadata.html" title="struct tracing_core::metadata::Metadata">Metadata</a><'_>, ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>) -> <a class="primitive" href="https://doc.rust-lang.org/1.80.0/std/primitive.bool.html">bool</a></h4></section></summary><div class="docblock"><p>Returns <code>true</code> if this layer is interested in a span or event with the
|
||
given <code>metadata</code> in the current <a href="struct.Context.html" title="struct tracing_subscriber::layer::Context"><code>Context</code></a>, similarly to
|
||
<a href="../../tracing_core/subscriber/trait.Subscriber.html#tymethod.enabled" title="method tracing_core::subscriber::Subscriber::enabled"><code>Subscriber::enabled</code></a>.</p>
|
||
<p>By default, this always returns <code>true</code>, allowing the wrapped subscriber
|
||
to choose to disable the span.</p>
|
||
<pre class="ignore" style="white-space:normal;font:inherit;">
|
||
<strong>Note</strong>: This method (and <a href="#method.register_callsite">
|
||
<code>Layer::register_callsite</code></a>) determine whether a span or event is
|
||
globally enabled, <em>not</em> whether the individual layer will be
|
||
notified about that span or event. This is intended to be used
|
||
by layers that implement filtering for the entire stack. Layers which do
|
||
not wish to be notified about certain spans or events but do not wish to
|
||
globally disable them should ignore those spans or events in their
|
||
<a href="#method.on_event"><code>on_event</code></a>,
|
||
<a href="#method.on_enter"><code>on_enter</code></a>,
|
||
<a href="#method.on_exit"><code>on_exit</code></a>, and other notification
|
||
methods.
|
||
</pre>
|
||
<p>See <a href="#filtering-with-layers">the trait-level documentation</a> for more information on filtering
|
||
with <code>Layer</code>s.</p>
|
||
</div></details><details class="toggle method-toggle" open><summary><section id="method.on_new_span" class="method"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#875-877">source</a><h4 class="code-header">fn <a href="#method.on_new_span" class="fn">on_new_span</a>(&self, attrs: &<a class="struct" href="../../tracing_core/span/struct.Attributes.html" title="struct tracing_core::span::Attributes">Attributes</a><'_>, id: &<a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>, ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>)</h4></section></summary><div class="docblock"><p>Notifies this layer that a new span was constructed with the given
|
||
<code>Attributes</code> and <code>Id</code>.</p>
|
||
</div></details><details class="toggle method-toggle" open><summary><section id="method.on_record" class="method"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#892">source</a><h4 class="code-header">fn <a href="#method.on_record" class="fn">on_record</a>(&self, _span: &<a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>, _values: &<a class="struct" href="../../tracing_core/span/struct.Record.html" title="struct tracing_core::span::Record">Record</a><'_>, _ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>)</h4></section></summary><div class="docblock"><p>Notifies this layer that a span with the given <code>Id</code> recorded the given
|
||
<code>values</code>.</p>
|
||
</div></details><details class="toggle method-toggle" open><summary><section id="method.on_follows_from" class="method"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#899">source</a><h4 class="code-header">fn <a href="#method.on_follows_from" class="fn">on_follows_from</a>(&self, _span: &<a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>, _follows: &<a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>, _ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>)</h4></section></summary><div class="docblock"><p>Notifies this layer that a span with the ID <code>span</code> recorded that it
|
||
follows from the span with the ID <code>follows</code>.</p>
|
||
</div></details><details class="toggle method-toggle" open><summary><section id="method.event_enabled" class="method"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#922-924">source</a><h4 class="code-header">fn <a href="#method.event_enabled" class="fn">event_enabled</a>(&self, _event: &<a class="struct" href="../../tracing_core/event/struct.Event.html" title="struct tracing_core::event::Event">Event</a><'_>, _ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>) -> <a class="primitive" href="https://doc.rust-lang.org/1.80.0/std/primitive.bool.html">bool</a></h4></section></summary><div class="docblock"><p>Called before <a href="trait.Layer.html#method.on_event"><code>on_event</code></a>, to determine if <code>on_event</code> should be called.</p>
|
||
<div class="example-wrap" style="display:inline-block">
|
||
<pre class="ignore" style="white-space:normal;font:inherit;">
|
||
<p><strong>Note</strong>: This method determines whether an event is globally enabled,
|
||
<em>not</em> whether the individual <code>Layer</code> will be notified about the
|
||
event. This is intended to be used by <code>Layer</code>s that implement
|
||
filtering for the entire stack. <code>Layer</code>s which do not wish to be
|
||
notified about certain events but do not wish to globally disable them
|
||
should ignore those events in their <a href="trait.Layer.html#method.on_event">on_event</a>.</p>
|
||
<p></pre></div></p>
|
||
<p>See <a href="#filtering-with-layers">the trait-level documentation</a> for more information on filtering
|
||
with <code>Layer</code>s.</p>
|
||
</div></details><details class="toggle method-toggle" open><summary><section id="method.on_event" class="method"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#927">source</a><h4 class="code-header">fn <a href="#method.on_event" class="fn">on_event</a>(&self, _event: &<a class="struct" href="../../tracing_core/event/struct.Event.html" title="struct tracing_core::event::Event">Event</a><'_>, _ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>)</h4></section></summary><div class="docblock"><p>Notifies this layer that an event has occurred.</p>
|
||
</div></details><details class="toggle method-toggle" open><summary><section id="method.on_enter" class="method"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#930">source</a><h4 class="code-header">fn <a href="#method.on_enter" class="fn">on_enter</a>(&self, _id: &<a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>, _ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>)</h4></section></summary><div class="docblock"><p>Notifies this layer that a span with the given ID was entered.</p>
|
||
</div></details><details class="toggle method-toggle" open><summary><section id="method.on_exit" class="method"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#933">source</a><h4 class="code-header">fn <a href="#method.on_exit" class="fn">on_exit</a>(&self, _id: &<a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>, _ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>)</h4></section></summary><div class="docblock"><p>Notifies this layer that the span with the given ID was exited.</p>
|
||
</div></details><details class="toggle method-toggle" open><summary><section id="method.on_close" class="method"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#936">source</a><h4 class="code-header">fn <a href="#method.on_close" class="fn">on_close</a>(&self, _id: <a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>, _ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>)</h4></section></summary><div class="docblock"><p>Notifies this layer that the span with the given ID has been closed.</p>
|
||
</div></details><details class="toggle method-toggle" open><summary><section id="method.on_id_change" class="method"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#940">source</a><h4 class="code-header">fn <a href="#method.on_id_change" class="fn">on_id_change</a>(&self, _old: &<a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>, _new: &<a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>, _ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>)</h4></section></summary><div class="docblock"><p>Notifies this layer that a span ID has been cloned, and that the
|
||
subscriber returned a different ID.</p>
|
||
</div></details><details class="toggle method-toggle" open><summary><section id="method.and_then" class="method"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1039-1046">source</a><h4 class="code-header">fn <a href="#method.and_then" class="fn">and_then</a><L>(self, layer: L) -> <a class="struct" href="struct.Layered.html" title="struct tracing_subscriber::layer::Layered">Layered</a><L, Self, S><div class="where">where
|
||
L: <a class="trait" href="trait.Layer.html" title="trait tracing_subscriber::layer::Layer">Layer</a><S>,
|
||
Self: <a class="trait" href="https://doc.rust-lang.org/1.80.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</div></h4></section></summary><div class="docblock"><p>Composes this layer around the given <code>Layer</code>, returning a <code>Layered</code>
|
||
struct implementing <code>Layer</code>.</p>
|
||
<p>The returned <code>Layer</code> will call the methods on this <code>Layer</code> and then
|
||
those of the new <code>Layer</code>, before calling the methods on the subscriber
|
||
it wraps. For example:</p>
|
||
|
||
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">pub struct </span>FooLayer {
|
||
<span class="comment">// ...
|
||
</span>}
|
||
|
||
<span class="kw">pub struct </span>BarLayer {
|
||
<span class="comment">// ...
|
||
</span>}
|
||
|
||
<span class="kw">pub struct </span>MySubscriber {
|
||
<span class="comment">// ...
|
||
</span>}
|
||
|
||
<span class="kw">impl</span><S: Subscriber> Layer<S> <span class="kw">for </span>FooLayer {
|
||
<span class="comment">// ...
|
||
</span>}
|
||
|
||
<span class="kw">impl</span><S: Subscriber> Layer<S> <span class="kw">for </span>BarLayer {
|
||
<span class="comment">// ...
|
||
</span>}
|
||
|
||
<span class="kw">let </span>subscriber = FooLayer::new()
|
||
.and_then(BarLayer::new())
|
||
.with_subscriber(MySubscriber::new());</code></pre></div>
|
||
<p>Multiple layers may be composed in this manner:</p>
|
||
|
||
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">pub struct </span>BazLayer {
|
||
<span class="comment">// ...
|
||
</span>}
|
||
|
||
<span class="kw">impl</span><S: Subscriber> Layer<S> <span class="kw">for </span>BazLayer {
|
||
<span class="comment">// ...
|
||
</span>}
|
||
|
||
<span class="kw">let </span>subscriber = FooLayer::new()
|
||
.and_then(BarLayer::new())
|
||
.and_then(BazLayer::new())
|
||
.with_subscriber(MySubscriber::new());</code></pre></div>
|
||
</div></details><details class="toggle method-toggle" open><summary><section id="method.with_subscriber" class="method"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1091-1098">source</a><h4 class="code-header">fn <a href="#method.with_subscriber" class="fn">with_subscriber</a>(self, inner: S) -> <a class="struct" href="struct.Layered.html" title="struct tracing_subscriber::layer::Layered">Layered</a><Self, S><div class="where">where
|
||
Self: <a class="trait" href="https://doc.rust-lang.org/1.80.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</div></h4></section></summary><div class="docblock"><p>Composes this <code>Layer</code> with the given <a href="../../tracing_core/subscriber/trait.Subscriber.html" title="trait tracing_core::subscriber::Subscriber"><code>Subscriber</code></a>, returning a
|
||
<code>Layered</code> struct that implements <a href="../../tracing_core/subscriber/trait.Subscriber.html" title="trait tracing_core::subscriber::Subscriber"><code>Subscriber</code></a>.</p>
|
||
<p>The returned <code>Layered</code> subscriber will call the methods on this <code>Layer</code>
|
||
and then those of the wrapped subscriber.</p>
|
||
<p>For example:</p>
|
||
|
||
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">pub struct </span>FooLayer {
|
||
<span class="comment">// ...
|
||
</span>}
|
||
|
||
<span class="kw">pub struct </span>MySubscriber {
|
||
<span class="comment">// ...
|
||
</span>}
|
||
|
||
<span class="kw">impl</span><S: Subscriber> Layer<S> <span class="kw">for </span>FooLayer {
|
||
<span class="comment">// ...
|
||
</span>}
|
||
|
||
<span class="kw">let </span>subscriber = FooLayer::new()
|
||
.with_subscriber(MySubscriber::new());</code></pre></div>
|
||
</div></details><details class="toggle method-toggle" open><summary><section id="method.with_filter" class="method"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1110-1116">source</a><h4 class="code-header">fn <a href="#method.with_filter" class="fn">with_filter</a><F>(self, filter: F) -> <a class="struct" href="../filter/struct.Filtered.html" title="struct tracing_subscriber::filter::Filtered">Filtered</a><Self, F, S><div class="where">where
|
||
Self: <a class="trait" href="https://doc.rust-lang.org/1.80.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,
|
||
F: <a class="trait" href="trait.Filter.html" title="trait tracing_subscriber::layer::Filter">Filter</a><S>,</div></h4></section></summary><div class="docblock"><p>Combines <code>self</code> with a <a href="trait.Filter.html" title="trait tracing_subscriber::layer::Filter"><code>Filter</code></a>, returning a <a href="../filter/struct.Filtered.html" title="struct tracing_subscriber::filter::Filtered"><code>Filtered</code></a> layer.</p>
|
||
<p>The <a href="trait.Filter.html" title="trait tracing_subscriber::layer::Filter"><code>Filter</code></a> will control which spans and events are enabled for
|
||
this layer. See <a href="index.html#per-layer-filtering" title="mod tracing_subscriber::layer">the trait-level documentation</a> for details on
|
||
per-layer filtering.</p>
|
||
</div></details><details class="toggle method-toggle" open><summary><section id="method.boxed" class="method"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1234-1241">source</a><h4 class="code-header">fn <a href="#method.boxed" class="fn">boxed</a>(self) -> <a class="struct" href="https://doc.rust-lang.org/1.80.0/alloc/boxed/struct.Box.html" title="struct alloc::boxed::Box">Box</a><dyn <a class="trait" href="trait.Layer.html" title="trait tracing_subscriber::layer::Layer">Layer</a><S> + <a class="trait" href="https://doc.rust-lang.org/1.80.0/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> + <a class="trait" href="https://doc.rust-lang.org/1.80.0/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a> + 'static><div class="where">where
|
||
Self: <a class="trait" href="https://doc.rust-lang.org/1.80.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="trait.Layer.html" title="trait tracing_subscriber::layer::Layer">Layer</a><S> + <a class="trait" href="https://doc.rust-lang.org/1.80.0/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> + <a class="trait" href="https://doc.rust-lang.org/1.80.0/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a> + 'static,
|
||
S: <a class="trait" href="../../tracing_core/subscriber/trait.Subscriber.html" title="trait tracing_core::subscriber::Subscriber">Subscriber</a>,</div></h4></section></summary><div class="docblock"><p>Erases the type of this <a href="trait.Layer.html" title="trait tracing_subscriber::layer::Layer"><code>Layer</code></a>, returning a <a href="https://doc.rust-lang.org/1.80.0/alloc/boxed/struct.Box.html" title="struct alloc::boxed::Box"><code>Box</code></a>ed <code>dyn Layer</code> trait object.</p>
|
||
<p>This can be used when a function returns a <code>Layer</code> which may be of
|
||
one of several types, or when a <code>Layer</code> subscriber has a very long type
|
||
signature.</p>
|
||
<h5 id="examples"><a class="doc-anchor" href="#examples">§</a>Examples</h5>
|
||
<p>The following example will <em>not</em> compile, because the value assigned to
|
||
<code>log_layer</code> may have one of several different types:</p>
|
||
|
||
<div class="example-wrap compile_fail"><a href="#" class="tooltip" title="This example deliberately fails to compile">ⓘ</a><pre class="rust rust-example-rendered"><code><span class="kw">use </span>tracing_subscriber::{Layer, filter::LevelFilter, prelude::<span class="kw-2">*</span>};
|
||
<span class="kw">use </span>std::{path::PathBuf, fs::File, io};
|
||
|
||
<span class="doccomment">/// Configures whether logs are emitted to a file, to stdout, or to stderr.
|
||
</span><span class="kw">pub enum </span>LogConfig {
|
||
File(PathBuf),
|
||
Stdout,
|
||
Stderr,
|
||
}
|
||
|
||
<span class="kw">let </span>config = <span class="comment">// ...
|
||
|
||
// Depending on the config, construct a layer of one of several types.
|
||
</span><span class="kw">let </span>log_layer = <span class="kw">match </span>config {
|
||
<span class="comment">// If logging to a file, use a maximally-verbose configuration.
|
||
</span>LogConfig::File(path) => {
|
||
<span class="kw">let </span>file = File::create(path)<span class="question-mark">?</span>;
|
||
tracing_subscriber::fmt::layer()
|
||
.with_thread_ids(<span class="bool-val">true</span>)
|
||
.with_thread_names(<span class="bool-val">true</span>)
|
||
<span class="comment">// Selecting the JSON logging format changes the layer's
|
||
// type.
|
||
</span>.json()
|
||
.with_span_list(<span class="bool-val">true</span>)
|
||
<span class="comment">// Setting the writer to use our log file changes the
|
||
// layer's type again.
|
||
</span>.with_writer(file)
|
||
},
|
||
|
||
<span class="comment">// If logging to stdout, use a pretty, human-readable configuration.
|
||
</span>LogConfig::Stdout => tracing_subscriber::fmt::layer()
|
||
<span class="comment">// Selecting the "pretty" logging format changes the
|
||
// layer's type!
|
||
</span>.pretty()
|
||
.with_writer(io::stdout)
|
||
<span class="comment">// Add a filter based on the RUST_LOG environment variable;
|
||
// this changes the type too!
|
||
</span>.and_then(tracing_subscriber::EnvFilter::from_default_env()),
|
||
|
||
<span class="comment">// If logging to stdout, only log errors and warnings.
|
||
</span>LogConfig::Stderr => tracing_subscriber::fmt::layer()
|
||
<span class="comment">// Changing the writer changes the layer's type
|
||
</span>.with_writer(io::stderr)
|
||
<span class="comment">// Only log the `WARN` and `ERROR` levels. Adding a filter
|
||
// changes the layer's type to `Filtered<LevelFilter, ...>`.
|
||
</span>.with_filter(LevelFilter::WARN),
|
||
};
|
||
|
||
tracing_subscriber::registry()
|
||
.with(log_layer)
|
||
.init();</code></pre></div>
|
||
<p>However, adding a call to <code>.boxed()</code> after each match arm erases the
|
||
layer’s type, so this code <em>does</em> compile:</p>
|
||
|
||
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>log_layer = <span class="kw">match </span>config {
|
||
LogConfig::File(path) => {
|
||
<span class="kw">let </span>file = File::create(path)<span class="question-mark">?</span>;
|
||
tracing_subscriber::fmt::layer()
|
||
.with_thread_ids(<span class="bool-val">true</span>)
|
||
.with_thread_names(<span class="bool-val">true</span>)
|
||
.json()
|
||
.with_span_list(<span class="bool-val">true</span>)
|
||
.with_writer(file)
|
||
<span class="comment">// Erase the type by boxing the layer
|
||
</span>.boxed()
|
||
},
|
||
|
||
LogConfig::Stdout => tracing_subscriber::fmt::layer()
|
||
.pretty()
|
||
.with_writer(io::stdout)
|
||
.and_then(tracing_subscriber::EnvFilter::from_default_env())
|
||
<span class="comment">// Erase the type by boxing the layer
|
||
</span>.boxed(),
|
||
|
||
LogConfig::Stderr => tracing_subscriber::fmt::layer()
|
||
.with_writer(io::stderr)
|
||
.with_filter(LevelFilter::WARN)
|
||
<span class="comment">// Erase the type by boxing the layer
|
||
</span>.boxed(),
|
||
};
|
||
|
||
tracing_subscriber::registry()
|
||
.with(log_layer)
|
||
.init();</code></pre></div>
|
||
</div></details></div><h2 id="trait-implementations" class="section-header">Trait Implementations<a href="#trait-implementations" class="anchor">§</a></h2><div id="trait-implementations-list"><details class="toggle implementors-toggle" open><summary><section id="impl-Layer%3CS%3E-for-Box%3Cdyn+Layer%3CS%3E+%2B+Send+%2B+Sync%3E" class="impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1768-1773">source</a><a href="#impl-Layer%3CS%3E-for-Box%3Cdyn+Layer%3CS%3E+%2B+Send+%2B+Sync%3E" class="anchor">§</a><h3 class="code-header">impl<S> <a class="trait" href="trait.Layer.html" title="trait tracing_subscriber::layer::Layer">Layer</a><S> for <a class="struct" href="https://doc.rust-lang.org/1.80.0/alloc/boxed/struct.Box.html" title="struct alloc::boxed::Box">Box</a><dyn <a class="trait" href="trait.Layer.html" title="trait tracing_subscriber::layer::Layer">Layer</a><S> + <a class="trait" href="https://doc.rust-lang.org/1.80.0/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> + <a class="trait" href="https://doc.rust-lang.org/1.80.0/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a>><div class="where">where
|
||
S: <a class="trait" href="../../tracing_core/subscriber/trait.Subscriber.html" title="trait tracing_core::subscriber::Subscriber">Subscriber</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.on_register_dispatch-1" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1772">source</a><a href="#method.on_register_dispatch-1" class="anchor">§</a><h4 class="code-header">fn <a href="trait.Layer.html#method.on_register_dispatch" class="fn">on_register_dispatch</a>(&self, subscriber: &<a class="struct" href="../../tracing_core/dispatcher/struct.Dispatch.html" title="struct tracing_core::dispatcher::Dispatch">Dispatch</a>)</h4></section></summary><div class='docblock'>Performs late initialization when installing this layer as a
|
||
<a href="../../tracing_core/subscriber/trait.Subscriber.html" title="trait tracing_core::subscriber::Subscriber"><code>Subscriber</code></a>. <a href="trait.Layer.html#method.on_register_dispatch">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.on_layer-1" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1772">source</a><a href="#method.on_layer-1" class="anchor">§</a><h4 class="code-header">fn <a href="trait.Layer.html#method.on_layer" class="fn">on_layer</a>(&mut self, subscriber: <a class="primitive" href="https://doc.rust-lang.org/1.80.0/std/primitive.reference.html">&mut S</a>)</h4></section></summary><div class='docblock'>Performs late initialization when attaching a <code>Layer</code> to a
|
||
<a href="../../tracing_core/subscriber/trait.Subscriber.html" title="trait tracing_core::subscriber::Subscriber"><code>Subscriber</code></a>. <a href="trait.Layer.html#method.on_layer">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.on_new_span-1" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1772">source</a><a href="#method.on_new_span-1" class="anchor">§</a><h4 class="code-header">fn <a href="trait.Layer.html#method.on_new_span" class="fn">on_new_span</a>(&self, attrs: &<a class="struct" href="../../tracing_core/span/struct.Attributes.html" title="struct tracing_core::span::Attributes">Attributes</a><'_>, id: &<a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>, ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>)</h4></section></summary><div class='docblock'>Notifies this layer that a new span was constructed with the given
|
||
<code>Attributes</code> and <code>Id</code>.</div></details><details class="toggle method-toggle" open><summary><section id="method.register_callsite-1" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1772">source</a><a href="#method.register_callsite-1" class="anchor">§</a><h4 class="code-header">fn <a href="trait.Layer.html#method.register_callsite" class="fn">register_callsite</a>(&self, metadata: &'static <a class="struct" href="../../tracing_core/metadata/struct.Metadata.html" title="struct tracing_core::metadata::Metadata">Metadata</a><'static>) -> <a class="struct" href="../../tracing_core/subscriber/struct.Interest.html" title="struct tracing_core::subscriber::Interest">Interest</a></h4></section></summary><div class='docblock'>Registers a new callsite with this layer, returning whether or not
|
||
the layer is interested in being notified about the callsite, similarly
|
||
to <a href="../../tracing_core/subscriber/trait.Subscriber.html#method.register_callsite" title="method tracing_core::subscriber::Subscriber::register_callsite"><code>Subscriber::register_callsite</code></a>. <a href="trait.Layer.html#method.register_callsite">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.enabled-1" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1772">source</a><a href="#method.enabled-1" class="anchor">§</a><h4 class="code-header">fn <a href="trait.Layer.html#method.enabled" class="fn">enabled</a>(&self, metadata: &<a class="struct" href="../../tracing_core/metadata/struct.Metadata.html" title="struct tracing_core::metadata::Metadata">Metadata</a><'_>, ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>) -> <a class="primitive" href="https://doc.rust-lang.org/1.80.0/std/primitive.bool.html">bool</a></h4></section></summary><div class='docblock'>Returns <code>true</code> if this layer is interested in a span or event with the
|
||
given <code>metadata</code> in the current <a href="struct.Context.html" title="struct tracing_subscriber::layer::Context"><code>Context</code></a>, similarly to
|
||
<a href="../../tracing_core/subscriber/trait.Subscriber.html#tymethod.enabled" title="method tracing_core::subscriber::Subscriber::enabled"><code>Subscriber::enabled</code></a>. <a href="trait.Layer.html#method.enabled">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.on_record-1" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1772">source</a><a href="#method.on_record-1" class="anchor">§</a><h4 class="code-header">fn <a href="trait.Layer.html#method.on_record" class="fn">on_record</a>(&self, span: &<a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>, values: &<a class="struct" href="../../tracing_core/span/struct.Record.html" title="struct tracing_core::span::Record">Record</a><'_>, ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>)</h4></section></summary><div class='docblock'>Notifies this layer that a span with the given <code>Id</code> recorded the given
|
||
<code>values</code>.</div></details><details class="toggle method-toggle" open><summary><section id="method.on_follows_from-1" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1772">source</a><a href="#method.on_follows_from-1" class="anchor">§</a><h4 class="code-header">fn <a href="trait.Layer.html#method.on_follows_from" class="fn">on_follows_from</a>(&self, span: &<a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>, follows: &<a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>, ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>)</h4></section></summary><div class='docblock'>Notifies this layer that a span with the ID <code>span</code> recorded that it
|
||
follows from the span with the ID <code>follows</code>.</div></details><details class="toggle method-toggle" open><summary><section id="method.event_enabled-1" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1772">source</a><a href="#method.event_enabled-1" class="anchor">§</a><h4 class="code-header">fn <a href="trait.Layer.html#method.event_enabled" class="fn">event_enabled</a>(&self, event: &<a class="struct" href="../../tracing_core/event/struct.Event.html" title="struct tracing_core::event::Event">Event</a><'_>, ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>) -> <a class="primitive" href="https://doc.rust-lang.org/1.80.0/std/primitive.bool.html">bool</a></h4></section></summary><div class='docblock'>Called before <a href="trait.Layer.html#method.on_event"><code>on_event</code></a>, to determine if <code>on_event</code> should be called.</div></details><details class="toggle method-toggle" open><summary><section id="method.on_event-1" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1772">source</a><a href="#method.on_event-1" class="anchor">§</a><h4 class="code-header">fn <a href="trait.Layer.html#method.on_event" class="fn">on_event</a>(&self, event: &<a class="struct" href="../../tracing_core/event/struct.Event.html" title="struct tracing_core::event::Event">Event</a><'_>, ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>)</h4></section></summary><div class='docblock'>Notifies this layer that an event has occurred.</div></details><details class="toggle method-toggle" open><summary><section id="method.on_enter-1" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1772">source</a><a href="#method.on_enter-1" class="anchor">§</a><h4 class="code-header">fn <a href="trait.Layer.html#method.on_enter" class="fn">on_enter</a>(&self, id: &<a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>, ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>)</h4></section></summary><div class='docblock'>Notifies this layer that a span with the given ID was entered.</div></details><details class="toggle method-toggle" open><summary><section id="method.on_exit-1" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1772">source</a><a href="#method.on_exit-1" class="anchor">§</a><h4 class="code-header">fn <a href="trait.Layer.html#method.on_exit" class="fn">on_exit</a>(&self, id: &<a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>, ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>)</h4></section></summary><div class='docblock'>Notifies this layer that the span with the given ID was exited.</div></details><details class="toggle method-toggle" open><summary><section id="method.on_close-1" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1772">source</a><a href="#method.on_close-1" class="anchor">§</a><h4 class="code-header">fn <a href="trait.Layer.html#method.on_close" class="fn">on_close</a>(&self, id: <a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>, ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>)</h4></section></summary><div class='docblock'>Notifies this layer that the span with the given ID has been closed.</div></details><details class="toggle method-toggle" open><summary><section id="method.on_id_change-1" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1772">source</a><a href="#method.on_id_change-1" class="anchor">§</a><h4 class="code-header">fn <a href="trait.Layer.html#method.on_id_change" class="fn">on_id_change</a>(&self, old: &<a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>, new: &<a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>, ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>)</h4></section></summary><div class='docblock'>Notifies this layer that a span ID has been cloned, and that the
|
||
subscriber returned a different ID.</div></details><details class="toggle method-toggle" open><summary><section id="method.and_then-1" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1039-1046">source</a><a href="#method.and_then-1" class="anchor">§</a><h4 class="code-header">fn <a href="trait.Layer.html#method.and_then" class="fn">and_then</a><L>(self, layer: L) -> <a class="struct" href="struct.Layered.html" title="struct tracing_subscriber::layer::Layered">Layered</a><L, Self, S><div class="where">where
|
||
L: <a class="trait" href="trait.Layer.html" title="trait tracing_subscriber::layer::Layer">Layer</a><S>,
|
||
Self: <a class="trait" href="https://doc.rust-lang.org/1.80.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</div></h4></section></summary><div class='docblock'>Composes this layer around the given <code>Layer</code>, returning a <code>Layered</code>
|
||
struct implementing <code>Layer</code>. <a href="trait.Layer.html#method.and_then">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.with_subscriber-1" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1091-1098">source</a><a href="#method.with_subscriber-1" class="anchor">§</a><h4 class="code-header">fn <a href="trait.Layer.html#method.with_subscriber" class="fn">with_subscriber</a>(self, inner: S) -> <a class="struct" href="struct.Layered.html" title="struct tracing_subscriber::layer::Layered">Layered</a><Self, S><div class="where">where
|
||
Self: <a class="trait" href="https://doc.rust-lang.org/1.80.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</div></h4></section></summary><div class='docblock'>Composes this <code>Layer</code> with the given <a href="../../tracing_core/subscriber/trait.Subscriber.html" title="trait tracing_core::subscriber::Subscriber"><code>Subscriber</code></a>, returning a
|
||
<code>Layered</code> struct that implements <a href="../../tracing_core/subscriber/trait.Subscriber.html" title="trait tracing_core::subscriber::Subscriber"><code>Subscriber</code></a>. <a href="trait.Layer.html#method.with_subscriber">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.with_filter-1" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1110-1116">source</a><a href="#method.with_filter-1" class="anchor">§</a><h4 class="code-header">fn <a href="trait.Layer.html#method.with_filter" class="fn">with_filter</a><F>(self, filter: F) -> <a class="struct" href="../filter/struct.Filtered.html" title="struct tracing_subscriber::filter::Filtered">Filtered</a><Self, F, S><div class="where">where
|
||
Self: <a class="trait" href="https://doc.rust-lang.org/1.80.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,
|
||
F: <a class="trait" href="trait.Filter.html" title="trait tracing_subscriber::layer::Filter">Filter</a><S>,</div></h4></section></summary><div class='docblock'>Combines <code>self</code> with a <a href="trait.Filter.html" title="trait tracing_subscriber::layer::Filter"><code>Filter</code></a>, returning a <a href="../filter/struct.Filtered.html" title="struct tracing_subscriber::filter::Filtered"><code>Filtered</code></a> layer. <a href="trait.Layer.html#method.with_filter">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.boxed-1" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1234-1241">source</a><a href="#method.boxed-1" class="anchor">§</a><h4 class="code-header">fn <a href="trait.Layer.html#method.boxed" class="fn">boxed</a>(self) -> <a class="struct" href="https://doc.rust-lang.org/1.80.0/alloc/boxed/struct.Box.html" title="struct alloc::boxed::Box">Box</a><dyn <a class="trait" href="trait.Layer.html" title="trait tracing_subscriber::layer::Layer">Layer</a><S> + <a class="trait" href="https://doc.rust-lang.org/1.80.0/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> + <a class="trait" href="https://doc.rust-lang.org/1.80.0/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a> + 'static><div class="where">where
|
||
Self: <a class="trait" href="https://doc.rust-lang.org/1.80.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="trait.Layer.html" title="trait tracing_subscriber::layer::Layer">Layer</a><S> + <a class="trait" href="https://doc.rust-lang.org/1.80.0/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> + <a class="trait" href="https://doc.rust-lang.org/1.80.0/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a> + 'static,
|
||
S: <a class="trait" href="../../tracing_core/subscriber/trait.Subscriber.html" title="trait tracing_core::subscriber::Subscriber">Subscriber</a>,</div></h4></section></summary><div class='docblock'>Erases the type of this <a href="trait.Layer.html" title="trait tracing_subscriber::layer::Layer"><code>Layer</code></a>, returning a <a href="https://doc.rust-lang.org/1.80.0/alloc/boxed/struct.Box.html" title="struct alloc::boxed::Box"><code>Box</code></a>ed <code>dyn Layer</code> trait object. <a href="trait.Layer.html#method.boxed">Read more</a></div></details></div></details></div><h2 id="foreign-impls" class="section-header">Implementations on Foreign Types<a href="#foreign-impls" class="anchor">§</a></h2><details class="toggle implementors-toggle"><summary><section id="impl-Layer%3CS%3E-for-Option%3CL%3E" class="impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1559-1673">source</a><a href="#impl-Layer%3CS%3E-for-Option%3CL%3E" class="anchor">§</a><h3 class="code-header">impl<L, S> <a class="trait" href="trait.Layer.html" title="trait tracing_subscriber::layer::Layer">Layer</a><S> for <a class="enum" href="https://doc.rust-lang.org/1.80.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><L><div class="where">where
|
||
L: <a class="trait" href="trait.Layer.html" title="trait tracing_subscriber::layer::Layer">Layer</a><S>,
|
||
S: <a class="trait" href="../../tracing_core/subscriber/trait.Subscriber.html" title="trait tracing_core::subscriber::Subscriber">Subscriber</a>,</div></h3></section></summary><div class="impl-items"><section id="method.on_layer-2" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1564-1568">source</a><a href="#method.on_layer-2" class="anchor">§</a><h4 class="code-header">fn <a href="#method.on_layer" class="fn">on_layer</a>(&mut self, subscriber: <a class="primitive" href="https://doc.rust-lang.org/1.80.0/std/primitive.reference.html">&mut S</a>)</h4></section><section id="method.on_new_span-2" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1571-1575">source</a><a href="#method.on_new_span-2" class="anchor">§</a><h4 class="code-header">fn <a href="#method.on_new_span" class="fn">on_new_span</a>(&self, attrs: &<a class="struct" href="../../tracing_core/span/struct.Attributes.html" title="struct tracing_core::span::Attributes">Attributes</a><'_>, id: &<a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>, ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>)</h4></section><section id="method.register_callsite-2" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1578-1583">source</a><a href="#method.register_callsite-2" class="anchor">§</a><h4 class="code-header">fn <a href="#method.register_callsite" class="fn">register_callsite</a>(&self, metadata: &'static <a class="struct" href="../../tracing_core/metadata/struct.Metadata.html" title="struct tracing_core::metadata::Metadata">Metadata</a><'static>) -> <a class="struct" href="../../tracing_core/subscriber/struct.Interest.html" title="struct tracing_core::subscriber::Interest">Interest</a></h4></section><section id="method.enabled-2" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1586-1591">source</a><a href="#method.enabled-2" class="anchor">§</a><h4 class="code-header">fn <a href="#method.enabled" class="fn">enabled</a>(&self, metadata: &<a class="struct" href="../../tracing_core/metadata/struct.Metadata.html" title="struct tracing_core::metadata::Metadata">Metadata</a><'_>, ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>) -> <a class="primitive" href="https://doc.rust-lang.org/1.80.0/std/primitive.bool.html">bool</a></h4></section><section id="method.on_record-2" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1606-1610">source</a><a href="#method.on_record-2" class="anchor">§</a><h4 class="code-header">fn <a href="#method.on_record" class="fn">on_record</a>(&self, span: &<a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>, values: &<a class="struct" href="../../tracing_core/span/struct.Record.html" title="struct tracing_core::span::Record">Record</a><'_>, ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>)</h4></section><section id="method.on_follows_from-2" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1613-1617">source</a><a href="#method.on_follows_from-2" class="anchor">§</a><h4 class="code-header">fn <a href="#method.on_follows_from" class="fn">on_follows_from</a>(&self, span: &<a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>, follows: &<a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>, ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>)</h4></section><section id="method.event_enabled-2" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1620-1625">source</a><a href="#method.event_enabled-2" class="anchor">§</a><h4 class="code-header">fn <a href="#method.event_enabled" class="fn">event_enabled</a>(&self, event: &<a class="struct" href="../../tracing_core/event/struct.Event.html" title="struct tracing_core::event::Event">Event</a><'_>, ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>) -> <a class="primitive" href="https://doc.rust-lang.org/1.80.0/std/primitive.bool.html">bool</a></h4></section><section id="method.on_event-2" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1628-1632">source</a><a href="#method.on_event-2" class="anchor">§</a><h4 class="code-header">fn <a href="#method.on_event" class="fn">on_event</a>(&self, event: &<a class="struct" href="../../tracing_core/event/struct.Event.html" title="struct tracing_core::event::Event">Event</a><'_>, ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>)</h4></section><section id="method.on_enter-2" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1635-1639">source</a><a href="#method.on_enter-2" class="anchor">§</a><h4 class="code-header">fn <a href="#method.on_enter" class="fn">on_enter</a>(&self, id: &<a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>, ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>)</h4></section><section id="method.on_exit-2" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1642-1646">source</a><a href="#method.on_exit-2" class="anchor">§</a><h4 class="code-header">fn <a href="#method.on_exit" class="fn">on_exit</a>(&self, id: &<a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>, ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>)</h4></section><section id="method.on_close-2" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1649-1653">source</a><a href="#method.on_close-2" class="anchor">§</a><h4 class="code-header">fn <a href="#method.on_close" class="fn">on_close</a>(&self, id: <a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>, ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>)</h4></section><section id="method.on_id_change-2" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1656-1660">source</a><a href="#method.on_id_change-2" class="anchor">§</a><h4 class="code-header">fn <a href="#method.on_id_change" class="fn">on_id_change</a>(&self, old: &<a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>, new: &<a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>, ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>)</h4></section></div></details><details class="toggle implementors-toggle"><summary><section id="impl-Layer%3CS%3E-for-Box%3CL%3E" class="impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1760-1766">source</a><a href="#impl-Layer%3CS%3E-for-Box%3CL%3E" class="anchor">§</a><h3 class="code-header">impl<L, S> <a class="trait" href="trait.Layer.html" title="trait tracing_subscriber::layer::Layer">Layer</a><S> for <a class="struct" href="https://doc.rust-lang.org/1.80.0/alloc/boxed/struct.Box.html" title="struct alloc::boxed::Box">Box</a><L><div class="where">where
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||
L: <a class="trait" href="trait.Layer.html" title="trait tracing_subscriber::layer::Layer">Layer</a><S>,
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S: <a class="trait" href="../../tracing_core/subscriber/trait.Subscriber.html" title="trait tracing_core::subscriber::Subscriber">Subscriber</a>,</div></h3></section></summary><div class="impl-items"><section id="method.on_register_dispatch-2" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1765">source</a><a href="#method.on_register_dispatch-2" class="anchor">§</a><h4 class="code-header">fn <a href="#method.on_register_dispatch" class="fn">on_register_dispatch</a>(&self, subscriber: &<a class="struct" href="../../tracing_core/dispatcher/struct.Dispatch.html" title="struct tracing_core::dispatcher::Dispatch">Dispatch</a>)</h4></section><section id="method.on_layer-3" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1765">source</a><a href="#method.on_layer-3" class="anchor">§</a><h4 class="code-header">fn <a href="#method.on_layer" class="fn">on_layer</a>(&mut self, subscriber: <a class="primitive" href="https://doc.rust-lang.org/1.80.0/std/primitive.reference.html">&mut S</a>)</h4></section><section id="method.on_new_span-3" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1765">source</a><a href="#method.on_new_span-3" class="anchor">§</a><h4 class="code-header">fn <a href="#method.on_new_span" class="fn">on_new_span</a>(&self, attrs: &<a class="struct" href="../../tracing_core/span/struct.Attributes.html" title="struct tracing_core::span::Attributes">Attributes</a><'_>, id: &<a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>, ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>)</h4></section><section id="method.register_callsite-3" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1765">source</a><a href="#method.register_callsite-3" class="anchor">§</a><h4 class="code-header">fn <a href="#method.register_callsite" class="fn">register_callsite</a>(&self, metadata: &'static <a class="struct" href="../../tracing_core/metadata/struct.Metadata.html" title="struct tracing_core::metadata::Metadata">Metadata</a><'static>) -> <a class="struct" href="../../tracing_core/subscriber/struct.Interest.html" title="struct tracing_core::subscriber::Interest">Interest</a></h4></section><section id="method.enabled-3" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1765">source</a><a href="#method.enabled-3" class="anchor">§</a><h4 class="code-header">fn <a href="#method.enabled" class="fn">enabled</a>(&self, metadata: &<a class="struct" href="../../tracing_core/metadata/struct.Metadata.html" title="struct tracing_core::metadata::Metadata">Metadata</a><'_>, ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>) -> <a class="primitive" href="https://doc.rust-lang.org/1.80.0/std/primitive.bool.html">bool</a></h4></section><section id="method.on_record-3" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1765">source</a><a href="#method.on_record-3" class="anchor">§</a><h4 class="code-header">fn <a href="#method.on_record" class="fn">on_record</a>(&self, span: &<a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>, values: &<a class="struct" href="../../tracing_core/span/struct.Record.html" title="struct tracing_core::span::Record">Record</a><'_>, ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>)</h4></section><section id="method.on_follows_from-3" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1765">source</a><a href="#method.on_follows_from-3" class="anchor">§</a><h4 class="code-header">fn <a href="#method.on_follows_from" class="fn">on_follows_from</a>(&self, span: &<a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>, follows: &<a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>, ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>)</h4></section><section id="method.event_enabled-3" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1765">source</a><a href="#method.event_enabled-3" class="anchor">§</a><h4 class="code-header">fn <a href="#method.event_enabled" class="fn">event_enabled</a>(&self, event: &<a class="struct" href="../../tracing_core/event/struct.Event.html" title="struct tracing_core::event::Event">Event</a><'_>, ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>) -> <a class="primitive" href="https://doc.rust-lang.org/1.80.0/std/primitive.bool.html">bool</a></h4></section><section id="method.on_event-3" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1765">source</a><a href="#method.on_event-3" class="anchor">§</a><h4 class="code-header">fn <a href="#method.on_event" class="fn">on_event</a>(&self, event: &<a class="struct" href="../../tracing_core/event/struct.Event.html" title="struct tracing_core::event::Event">Event</a><'_>, ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>)</h4></section><section id="method.on_enter-3" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1765">source</a><a href="#method.on_enter-3" class="anchor">§</a><h4 class="code-header">fn <a href="#method.on_enter" class="fn">on_enter</a>(&self, id: &<a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>, ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>)</h4></section><section id="method.on_exit-3" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1765">source</a><a href="#method.on_exit-3" class="anchor">§</a><h4 class="code-header">fn <a href="#method.on_exit" class="fn">on_exit</a>(&self, id: &<a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>, ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>)</h4></section><section id="method.on_close-3" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1765">source</a><a href="#method.on_close-3" class="anchor">§</a><h4 class="code-header">fn <a href="#method.on_close" class="fn">on_close</a>(&self, id: <a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>, ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>)</h4></section><section id="method.on_id_change-3" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1765">source</a><a href="#method.on_id_change-3" class="anchor">§</a><h4 class="code-header">fn <a href="#method.on_id_change" class="fn">on_id_change</a>(&self, old: &<a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>, new: &<a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>, ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>)</h4></section></div></details><details class="toggle implementors-toggle"><summary><section id="impl-Layer%3CS%3E-for-Box%3Cdyn+Layer%3CS%3E+%2B+Send+%2B+Sync%3E-1" class="impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1768-1773">source</a><a href="#impl-Layer%3CS%3E-for-Box%3Cdyn+Layer%3CS%3E+%2B+Send+%2B+Sync%3E-1" class="anchor">§</a><h3 class="code-header">impl<S> <a class="trait" href="trait.Layer.html" title="trait tracing_subscriber::layer::Layer">Layer</a><S> for <a class="struct" href="https://doc.rust-lang.org/1.80.0/alloc/boxed/struct.Box.html" title="struct alloc::boxed::Box">Box</a><dyn <a class="trait" href="trait.Layer.html" title="trait tracing_subscriber::layer::Layer">Layer</a><S> + <a class="trait" href="https://doc.rust-lang.org/1.80.0/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> + <a class="trait" href="https://doc.rust-lang.org/1.80.0/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a>><div class="where">where
|
||
S: <a class="trait" href="../../tracing_core/subscriber/trait.Subscriber.html" title="trait tracing_core::subscriber::Subscriber">Subscriber</a>,</div></h3></section></summary><div class="impl-items"><section id="method.on_register_dispatch-3" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1772">source</a><a href="#method.on_register_dispatch-3" class="anchor">§</a><h4 class="code-header">fn <a href="#method.on_register_dispatch" class="fn">on_register_dispatch</a>(&self, subscriber: &<a class="struct" href="../../tracing_core/dispatcher/struct.Dispatch.html" title="struct tracing_core::dispatcher::Dispatch">Dispatch</a>)</h4></section><section id="method.on_layer-4" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1772">source</a><a href="#method.on_layer-4" class="anchor">§</a><h4 class="code-header">fn <a href="#method.on_layer" class="fn">on_layer</a>(&mut self, subscriber: <a class="primitive" href="https://doc.rust-lang.org/1.80.0/std/primitive.reference.html">&mut S</a>)</h4></section><section id="method.on_new_span-4" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1772">source</a><a href="#method.on_new_span-4" class="anchor">§</a><h4 class="code-header">fn <a href="#method.on_new_span" class="fn">on_new_span</a>(&self, attrs: &<a class="struct" href="../../tracing_core/span/struct.Attributes.html" title="struct tracing_core::span::Attributes">Attributes</a><'_>, id: &<a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>, ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>)</h4></section><section id="method.register_callsite-4" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1772">source</a><a href="#method.register_callsite-4" class="anchor">§</a><h4 class="code-header">fn <a href="#method.register_callsite" class="fn">register_callsite</a>(&self, metadata: &'static <a class="struct" href="../../tracing_core/metadata/struct.Metadata.html" title="struct tracing_core::metadata::Metadata">Metadata</a><'static>) -> <a class="struct" href="../../tracing_core/subscriber/struct.Interest.html" title="struct tracing_core::subscriber::Interest">Interest</a></h4></section><section id="method.enabled-4" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1772">source</a><a href="#method.enabled-4" class="anchor">§</a><h4 class="code-header">fn <a href="#method.enabled" class="fn">enabled</a>(&self, metadata: &<a class="struct" href="../../tracing_core/metadata/struct.Metadata.html" title="struct tracing_core::metadata::Metadata">Metadata</a><'_>, ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>) -> <a class="primitive" href="https://doc.rust-lang.org/1.80.0/std/primitive.bool.html">bool</a></h4></section><section id="method.on_record-4" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1772">source</a><a href="#method.on_record-4" class="anchor">§</a><h4 class="code-header">fn <a href="#method.on_record" class="fn">on_record</a>(&self, span: &<a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>, values: &<a class="struct" href="../../tracing_core/span/struct.Record.html" title="struct tracing_core::span::Record">Record</a><'_>, ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>)</h4></section><section id="method.on_follows_from-4" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1772">source</a><a href="#method.on_follows_from-4" class="anchor">§</a><h4 class="code-header">fn <a href="#method.on_follows_from" class="fn">on_follows_from</a>(&self, span: &<a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>, follows: &<a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>, ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>)</h4></section><section id="method.event_enabled-4" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1772">source</a><a href="#method.event_enabled-4" class="anchor">§</a><h4 class="code-header">fn <a href="#method.event_enabled" class="fn">event_enabled</a>(&self, event: &<a class="struct" href="../../tracing_core/event/struct.Event.html" title="struct tracing_core::event::Event">Event</a><'_>, ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>) -> <a class="primitive" href="https://doc.rust-lang.org/1.80.0/std/primitive.bool.html">bool</a></h4></section><section id="method.on_event-4" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1772">source</a><a href="#method.on_event-4" class="anchor">§</a><h4 class="code-header">fn <a href="#method.on_event" class="fn">on_event</a>(&self, event: &<a class="struct" href="../../tracing_core/event/struct.Event.html" title="struct tracing_core::event::Event">Event</a><'_>, ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>)</h4></section><section id="method.on_enter-4" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1772">source</a><a href="#method.on_enter-4" class="anchor">§</a><h4 class="code-header">fn <a href="#method.on_enter" class="fn">on_enter</a>(&self, id: &<a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>, ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>)</h4></section><section id="method.on_exit-4" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1772">source</a><a href="#method.on_exit-4" class="anchor">§</a><h4 class="code-header">fn <a href="#method.on_exit" class="fn">on_exit</a>(&self, id: &<a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>, ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>)</h4></section><section id="method.on_close-4" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1772">source</a><a href="#method.on_close-4" class="anchor">§</a><h4 class="code-header">fn <a href="#method.on_close" class="fn">on_close</a>(&self, id: <a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>, ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>)</h4></section><section id="method.on_id_change-4" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1772">source</a><a href="#method.on_id_change-4" class="anchor">§</a><h4 class="code-header">fn <a href="#method.on_id_change" class="fn">on_id_change</a>(&self, old: &<a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>, new: &<a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>, ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>)</h4></section></div></details><details class="toggle implementors-toggle"><summary><section id="impl-Layer%3CS%3E-for-Vec%3CL%3E" class="impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1777-1892">source</a><a href="#impl-Layer%3CS%3E-for-Vec%3CL%3E" class="anchor">§</a><h3 class="code-header">impl<S, L> <a class="trait" href="trait.Layer.html" title="trait tracing_subscriber::layer::Layer">Layer</a><S> for <a class="struct" href="https://doc.rust-lang.org/1.80.0/alloc/vec/struct.Vec.html" title="struct alloc::vec::Vec">Vec</a><L><div class="where">where
|
||
L: <a class="trait" href="trait.Layer.html" title="trait tracing_subscriber::layer::Layer">Layer</a><S>,
|
||
S: <a class="trait" href="../../tracing_core/subscriber/trait.Subscriber.html" title="trait tracing_core::subscriber::Subscriber">Subscriber</a>,</div></h3></section></summary><div class="impl-items"><section id="method.on_layer-5" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1783-1787">source</a><a href="#method.on_layer-5" class="anchor">§</a><h4 class="code-header">fn <a href="#method.on_layer" class="fn">on_layer</a>(&mut self, subscriber: <a class="primitive" href="https://doc.rust-lang.org/1.80.0/std/primitive.reference.html">&mut S</a>)</h4></section><section id="method.register_callsite-5" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1789-1802">source</a><a href="#method.register_callsite-5" class="anchor">§</a><h4 class="code-header">fn <a href="#method.register_callsite" class="fn">register_callsite</a>(&self, metadata: &'static <a class="struct" href="../../tracing_core/metadata/struct.Metadata.html" title="struct tracing_core::metadata::Metadata">Metadata</a><'static>) -> <a class="struct" href="../../tracing_core/subscriber/struct.Interest.html" title="struct tracing_core::subscriber::Interest">Interest</a></h4></section><section id="method.enabled-5" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1804-1806">source</a><a href="#method.enabled-5" class="anchor">§</a><h4 class="code-header">fn <a href="#method.enabled" class="fn">enabled</a>(&self, metadata: &<a class="struct" href="../../tracing_core/metadata/struct.Metadata.html" title="struct tracing_core::metadata::Metadata">Metadata</a><'_>, ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>) -> <a class="primitive" href="https://doc.rust-lang.org/1.80.0/std/primitive.bool.html">bool</a></h4></section><section id="method.event_enabled-5" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1808-1810">source</a><a href="#method.event_enabled-5" class="anchor">§</a><h4 class="code-header">fn <a href="#method.event_enabled" class="fn">event_enabled</a>(&self, event: &<a class="struct" href="../../tracing_core/event/struct.Event.html" title="struct tracing_core::event::Event">Event</a><'_>, ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>) -> <a class="primitive" href="https://doc.rust-lang.org/1.80.0/std/primitive.bool.html">bool</a></h4></section><section id="method.on_new_span-5" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1812-1816">source</a><a href="#method.on_new_span-5" class="anchor">§</a><h4 class="code-header">fn <a href="#method.on_new_span" class="fn">on_new_span</a>(&self, attrs: &<a class="struct" href="../../tracing_core/span/struct.Attributes.html" title="struct tracing_core::span::Attributes">Attributes</a><'_>, id: &<a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>, ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>)</h4></section><section id="method.on_record-5" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1832-1836">source</a><a href="#method.on_record-5" class="anchor">§</a><h4 class="code-header">fn <a href="#method.on_record" class="fn">on_record</a>(&self, span: &<a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>, values: &<a class="struct" href="../../tracing_core/span/struct.Record.html" title="struct tracing_core::span::Record">Record</a><'_>, ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>)</h4></section><section id="method.on_follows_from-5" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1838-1842">source</a><a href="#method.on_follows_from-5" class="anchor">§</a><h4 class="code-header">fn <a href="#method.on_follows_from" class="fn">on_follows_from</a>(&self, span: &<a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>, follows: &<a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>, ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>)</h4></section><section id="method.on_event-5" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1844-1848">source</a><a href="#method.on_event-5" class="anchor">§</a><h4 class="code-header">fn <a href="#method.on_event" class="fn">on_event</a>(&self, event: &<a class="struct" href="../../tracing_core/event/struct.Event.html" title="struct tracing_core::event::Event">Event</a><'_>, ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>)</h4></section><section id="method.on_enter-5" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1850-1854">source</a><a href="#method.on_enter-5" class="anchor">§</a><h4 class="code-header">fn <a href="#method.on_enter" class="fn">on_enter</a>(&self, id: &<a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>, ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>)</h4></section><section id="method.on_exit-5" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1856-1860">source</a><a href="#method.on_exit-5" class="anchor">§</a><h4 class="code-header">fn <a href="#method.on_exit" class="fn">on_exit</a>(&self, id: &<a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>, ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>)</h4></section><section id="method.on_close-5" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1862-1866">source</a><a href="#method.on_close-5" class="anchor">§</a><h4 class="code-header">fn <a href="#method.on_close" class="fn">on_close</a>(&self, id: <a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>, ctx: <a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>)</h4></section></div></details><h2 id="implementors" class="section-header">Implementors<a href="#implementors" class="anchor">§</a></h2><div id="implementors-list"><section id="impl-Layer%3CS%3E-for-Layer%3CL,+S%3E" class="impl"><a class="src rightside" href="../../src/tracing_subscriber/reload.rs.html#114-205">source</a><a href="#impl-Layer%3CS%3E-for-Layer%3CL,+S%3E" class="anchor">§</a><h3 class="code-header">impl<L, S> <a class="trait" href="trait.Layer.html" title="trait tracing_subscriber::layer::Layer">Layer</a><S> for tracing_subscriber::reload::<a class="struct" href="../reload/struct.Layer.html" title="struct tracing_subscriber::reload::Layer">Layer</a><L, S><div class="where">where
|
||
L: <a class="trait" href="trait.Layer.html" title="trait tracing_subscriber::layer::Layer">Layer</a><S> + 'static,
|
||
S: <a class="trait" href="../../tracing_core/subscriber/trait.Subscriber.html" title="trait tracing_core::subscriber::Subscriber">Subscriber</a>,</div></h3></section><section id="impl-Layer%3CS%3E-for-Targets" class="impl"><a class="src rightside" href="../../src/tracing_subscriber/filter/targets.rs.html#439-454">source</a><a href="#impl-Layer%3CS%3E-for-Targets" class="anchor">§</a><h3 class="code-header">impl<S> <a class="trait" href="trait.Layer.html" title="trait tracing_subscriber::layer::Layer">Layer</a><S> for <a class="struct" href="../filter/targets/struct.Targets.html" title="struct tracing_subscriber::filter::targets::Targets">Targets</a><div class="where">where
|
||
S: <a class="trait" href="../../tracing_core/subscriber/trait.Subscriber.html" title="trait tracing_core::subscriber::Subscriber">Subscriber</a>,</div></h3></section><section id="impl-Layer%3CS%3E-for-Layered%3CA,+B,+S%3E" class="impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/layered.rs.html#241-383">source</a><a href="#impl-Layer%3CS%3E-for-Layered%3CA,+B,+S%3E" class="anchor">§</a><h3 class="code-header">impl<S, A, B> <a class="trait" href="trait.Layer.html" title="trait tracing_subscriber::layer::Layer">Layer</a><S> for <a class="struct" href="struct.Layered.html" title="struct tracing_subscriber::layer::Layered">Layered</a><A, B, S><div class="where">where
|
||
A: <a class="trait" href="trait.Layer.html" title="trait tracing_subscriber::layer::Layer">Layer</a><S>,
|
||
B: <a class="trait" href="trait.Layer.html" title="trait tracing_subscriber::layer::Layer">Layer</a><S>,
|
||
S: <a class="trait" href="../../tracing_core/subscriber/trait.Subscriber.html" title="trait tracing_core::subscriber::Subscriber">Subscriber</a>,</div></h3></section><section id="impl-Layer%3CS%3E-for-FilterFn%3CF%3E" class="impl"><a class="src rightside" href="../../src/tracing_subscriber/filter/filter_fn.rs.html#324-340">source</a><a href="#impl-Layer%3CS%3E-for-FilterFn%3CF%3E" class="anchor">§</a><h3 class="code-header">impl<S, F> <a class="trait" href="trait.Layer.html" title="trait tracing_subscriber::layer::Layer">Layer</a><S> for <a class="struct" href="../filter/struct.FilterFn.html" title="struct tracing_subscriber::filter::FilterFn">FilterFn</a><F><div class="where">where
|
||
F: <a class="trait" href="https://doc.rust-lang.org/1.80.0/core/ops/function/trait.Fn.html" title="trait core::ops::function::Fn">Fn</a>(&<a class="struct" href="../../tracing_core/metadata/struct.Metadata.html" title="struct tracing_core::metadata::Metadata">Metadata</a><'_>) -> <a class="primitive" href="https://doc.rust-lang.org/1.80.0/std/primitive.bool.html">bool</a> + 'static,
|
||
S: <a class="trait" href="../../tracing_core/subscriber/trait.Subscriber.html" title="trait tracing_core::subscriber::Subscriber">Subscriber</a>,</div></h3></section><section id="impl-Layer%3CS%3E-for-DynFilterFn%3CS,+F,+R%3E" class="impl"><a class="src rightside" href="../../src/tracing_subscriber/filter/filter_fn.rs.html#643-660">source</a><a href="#impl-Layer%3CS%3E-for-DynFilterFn%3CS,+F,+R%3E" class="anchor">§</a><h3 class="code-header">impl<S, F, R> <a class="trait" href="trait.Layer.html" title="trait tracing_subscriber::layer::Layer">Layer</a><S> for <a class="struct" href="../filter/struct.DynFilterFn.html" title="struct tracing_subscriber::filter::DynFilterFn">DynFilterFn</a><S, F, R><div class="where">where
|
||
F: <a class="trait" href="https://doc.rust-lang.org/1.80.0/core/ops/function/trait.Fn.html" title="trait core::ops::function::Fn">Fn</a>(&<a class="struct" href="../../tracing_core/metadata/struct.Metadata.html" title="struct tracing_core::metadata::Metadata">Metadata</a><'_>, &<a class="struct" href="struct.Context.html" title="struct tracing_subscriber::layer::Context">Context</a><'_, S>) -> <a class="primitive" href="https://doc.rust-lang.org/1.80.0/std/primitive.bool.html">bool</a> + 'static,
|
||
R: <a class="trait" href="https://doc.rust-lang.org/1.80.0/core/ops/function/trait.Fn.html" title="trait core::ops::function::Fn">Fn</a>(&'static <a class="struct" href="../../tracing_core/metadata/struct.Metadata.html" title="struct tracing_core::metadata::Metadata">Metadata</a><'static>) -> <a class="struct" href="../../tracing_core/subscriber/struct.Interest.html" title="struct tracing_core::subscriber::Interest">Interest</a> + 'static,
|
||
S: <a class="trait" href="../../tracing_core/subscriber/trait.Subscriber.html" title="trait tracing_core::subscriber::Subscriber">Subscriber</a>,</div></h3></section><section id="impl-Layer%3CS%3E-for-Filtered%3CL,+F,+S%3E" class="impl"><a class="src rightside" href="../../src/tracing_subscriber/filter/layer_filters/mod.rs.html#703-869">source</a><a href="#impl-Layer%3CS%3E-for-Filtered%3CL,+F,+S%3E" class="anchor">§</a><h3 class="code-header">impl<S, L, F> <a class="trait" href="trait.Layer.html" title="trait tracing_subscriber::layer::Layer">Layer</a><S> for <a class="struct" href="../filter/struct.Filtered.html" title="struct tracing_subscriber::filter::Filtered">Filtered</a><L, F, S><div class="where">where
|
||
S: <a class="trait" href="../../tracing_core/subscriber/trait.Subscriber.html" title="trait tracing_core::subscriber::Subscriber">Subscriber</a> + for<'span> <a class="trait" href="../registry/trait.LookupSpan.html" title="trait tracing_subscriber::registry::LookupSpan">LookupSpan</a><'span> + 'static,
|
||
F: <a class="trait" href="trait.Filter.html" title="trait tracing_subscriber::layer::Filter">Filter</a><S> + 'static,
|
||
L: <a class="trait" href="trait.Layer.html" title="trait tracing_subscriber::layer::Layer">Layer</a><S>,</div></h3></section><section id="impl-Layer%3CS%3E-for-Layer%3CS,+N,+E,+W%3E" class="impl"><a class="src rightside" href="../../src/tracing_subscriber/fmt/fmt_layer.rs.html#804-1008">source</a><a href="#impl-Layer%3CS%3E-for-Layer%3CS,+N,+E,+W%3E" class="anchor">§</a><h3 class="code-header">impl<S, N, E, W> <a class="trait" href="trait.Layer.html" title="trait tracing_subscriber::layer::Layer">Layer</a><S> for tracing_subscriber::fmt::<a class="struct" href="../fmt/struct.Layer.html" title="struct tracing_subscriber::fmt::Layer">Layer</a><S, N, E, W><div class="where">where
|
||
S: <a class="trait" href="../../tracing_core/subscriber/trait.Subscriber.html" title="trait tracing_core::subscriber::Subscriber">Subscriber</a> + for<'a> <a class="trait" href="../registry/trait.LookupSpan.html" title="trait tracing_subscriber::registry::LookupSpan">LookupSpan</a><'a>,
|
||
N: for<'writer> <a class="trait" href="../fmt/trait.FormatFields.html" title="trait tracing_subscriber::fmt::FormatFields">FormatFields</a><'writer> + 'static,
|
||
E: <a class="trait" href="../fmt/trait.FormatEvent.html" title="trait tracing_subscriber::fmt::FormatEvent">FormatEvent</a><S, N> + 'static,
|
||
W: for<'writer> <a class="trait" href="../fmt/trait.MakeWriter.html" title="trait tracing_subscriber::fmt::MakeWriter">MakeWriter</a><'writer> + 'static,</div></h3></section><section id="impl-Layer%3CS%3E-for-EnvFilter" class="impl"><a class="src rightside" href="../../src/tracing_subscriber/filter/env/mod.rs.html#642-682">source</a><a href="#impl-Layer%3CS%3E-for-EnvFilter" class="anchor">§</a><h3 class="code-header">impl<S: <a class="trait" href="../../tracing_core/subscriber/trait.Subscriber.html" title="trait tracing_core::subscriber::Subscriber">Subscriber</a>> <a class="trait" href="trait.Layer.html" title="trait tracing_subscriber::layer::Layer">Layer</a><S> for <a class="struct" href="../filter/struct.EnvFilter.html" title="struct tracing_subscriber::filter::EnvFilter">EnvFilter</a></h3></section><section id="impl-Layer%3CS%3E-for-LevelFilter" class="impl"><a class="src rightside" href="../../src/tracing_subscriber/filter/level.rs.html#11-27">source</a><a href="#impl-Layer%3CS%3E-for-LevelFilter" class="anchor">§</a><h3 class="code-header">impl<S: <a class="trait" href="../../tracing_core/subscriber/trait.Subscriber.html" title="trait tracing_core::subscriber::Subscriber">Subscriber</a>> <a class="trait" href="trait.Layer.html" title="trait tracing_subscriber::layer::Layer">Layer</a><S> for <a class="struct" href="../filter/struct.LevelFilter.html" title="struct tracing_subscriber::filter::LevelFilter">LevelFilter</a></h3></section><section id="impl-Layer%3CS%3E-for-Identity" class="impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1902">source</a><a href="#impl-Layer%3CS%3E-for-Identity" class="anchor">§</a><h3 class="code-header">impl<S: <a class="trait" href="../../tracing_core/subscriber/trait.Subscriber.html" title="trait tracing_core::subscriber::Subscriber">Subscriber</a>> <a class="trait" href="trait.Layer.html" title="trait tracing_subscriber::layer::Layer">Layer</a><S> for <a class="struct" href="struct.Identity.html" title="struct tracing_subscriber::layer::Identity">Identity</a></h3></section></div><script src="../../trait.impl/tracing_subscriber/layer/trait.Layer.js" data-ignore-extern-crates="tracing_core,alloc,core" async></script></section></div></main></body></html> |