<!DOCTYPE html><htmllang="en"><head><metacharset="utf-8"><metaname="viewport"content="width=device-width, initial-scale=1.0"><metaname="generator"content="rustdoc"><metaname="description"content="Wraps a `Layer` or `Filter`, allowing it to be reloaded dynamically at runtime."><title>Layer in tracing_subscriber::reload - Rust</title><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../../static.files/SourceSerif4-Regular-46f98efaafac5295.ttf.woff2"><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../../static.files/FiraSans-Regular-018c141bf0843ffd.woff2"><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../../static.files/FiraSans-Medium-8f9a781e4970d388.woff2"><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../../static.files/SourceCodePro-Regular-562dcc5011b6de7d.ttf.woff2"><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../../static.files/SourceCodePro-Semibold-d899c5a5c4aeb14a.ttf.woff2"><linkrel="stylesheet"href="../../static.files/normalize-76eba96aa4d2e634.css"><linkrel="stylesheet"href="../../static.files/rustdoc-ac92e1bbe349e143.css"><metaname="rustdoc-vars"data-root-path="../../"data-static-root-path="../../static.files/"data-current-crate="tracing_subscriber"data-themes=""data-resource-suffix=""data-rustdoc-version="1.76.0 (07dca489a 2024-02-04)"data-channel="1.76.0"data-search-js="search-2b6ce74ff89ae146.js"data-settings-js="settings-4313503d2e1961c2.js"><scriptsrc="../../static.files/storage-f2adc0d6ca4d09fb.js"></script><scriptdefersrc="sidebar-items.js"></script><scriptdefersrc="../../static.files/main-305769736d49e732.js"></script><noscript><linkrel="stylesheet"href="../../static.files/noscript-feafe1bb7466e4bd.css"></noscript><linkrel="alternate icon"type="image/png"href="../../static.files/favicon-16x16-8b506e7a72182f1c.png"><linkrel="alternate icon"type="image/png"href="../../static.files/favicon-32x32-422f7d1d52889060.png"><linkrel="icon"type="image/svg+xml"href="../../static.files/favicon-2c020d218678b618.svg"></head><bodyclass="rustdoc struct"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><navclass="mobile-topbar"><buttonclass="sidebar-menu-toggle">☰</button><aclass="logo-container"href="../../tracing_subscriber/index.html"><imgsrc="https://raw.githubusercontent.com/tokio-rs/tracing/master/assets/logo-type.png"alt=""></a></nav><navclass="sidebar"><divclass="sidebar-crate"><aclass="logo-container"href="../../tracing_subscriber/index.html"><imgsrc="https://raw.githubusercontent.com/tokio-rs/tracing/master/assets/logo-type.png"alt="logo"></a><h2><ahref="../../tracing_subscriber/index.html">tracing_subscriber</a><spanclass="version">0.3.18</span></h2></div><h2class="location"><ahref="#">Layer</a></h2><divclass="sidebar-elems"><section><h3><ahref="#implementations">Methods</a></h3><ulclass="block method"><li><ahref="#method.handle">handle</a></li><li><ahref="#method.new">new</a></li></ul><h3><ahref="#trait-implementations">Trait Implementations</a></h3><ulclass="block trait-implementation"><li><ahref="#impl-Debug-for-Layer%3CL,+S%3E">Debug</a></li><li><ahref="#impl-Filter%3CS%3E-for-Layer%3CL,+S%3E">Filter<S></a></li><li><ahref="#impl-Layer%3CS%3E-for-Layer%3CL,+S%3E">Layer<S></a></li></ul><h3><ahref="#synthetic-implementations">Auto Trait Implementations</a></h3><ulclass="block synthetic-implementation"><li><ahref="#impl-RefUnwindSafe-for-Layer%3CL,+S%3E">RefUnwindSafe</a></li><li><ahref="#impl-Send-for-Layer%3CL,+S%3E">Send</a></li><li><ahref="#impl-Sync-for-Layer%3CL,+S%3E">Sync</a></li><li><ahref="#impl-Unpin-for-Layer%3CL,+S%3E">Unpin</a></li><li><ahref="#impl-UnwindSafe-for-Layer%3CL,+S%3E">UnwindSafe</a></li></ul><h3><ahref="#blanket-implementations">Blanket Implementations</a></h3><ulclass="block blanket-implementation"><li><ahref="#impl-Any-for-T">Any</a></li><li><ahref="#impl-Borrow%3CT%3E-for-T">Borrow<T></a></li><li><ahref=
<main><divclass="width-limiter"><navclass="sub"><formclass="search-form"><span></span><divid="sidebar-button"tabindex="-1"><ahref="../../tracing_subscriber/all.html"title="show sidebar"></a></div><inputclass="search-input"name="search"aria-label="Run search in the documentation"autocomplete="off"spellcheck="false"placeholder="Click or press ‘S’ to search, ‘?’ for more options…"type="search"><divid="help-button"tabindex="-1"><ahref="../../help.html"title="help">?</a></div><divid="settings-menu"tabindex="-1"><ahref="../../settings.html"title="settings"><imgwidth="22"height="22"alt="Change settings"src="../../static.files/wheel-7b819b6101059cd0.svg"></a></div></form></nav><sectionid="main-content"class="content"><divclass="main-heading"><h1>Struct <ahref="../index.html">tracing_subscriber</a>::<wbr><ahref="index.html">reload</a>::<wbr><aclass="struct"href="#">Layer</a><buttonid="copy-path"title="Copy item path to clipboard"><imgsrc="../../static.files/clipboard-7571035ce49a181d.svg"width="19"height="18"alt="Copy item path"></button></h1><spanclass="out-of-band"><aclass="src"href="../../src/tracing_subscriber/reload.rs.html#84-91">source</a> · <buttonid="toggle-all-docs"title="collapse all docs">[<span>−</span>]</button></span></div><preclass="rust item-decl"><code>pub struct Layer<L, S> { <spanclass="comment">/* private fields */</span> }</code></pre><detailsclass="toggle top-doc"open><summaryclass="hideme"><span>Expand description</span></summary><divclass="docblock"><p>Wraps a <code>Layer</code> or <code>Filter</code>, allowing it to be reloaded dynamically at runtime.</p>
</div></details><h2id="implementations"class="section-header">Implementations<ahref="#implementations"class="anchor">§</a></h2><divid="implementations-list"><detailsclass="toggle implementors-toggle"open><summary><sectionid="impl-Layer%3CL,+S%3E"class="impl"><aclass="src rightside"href="../../src/tracing_subscriber/reload.rs.html#257-282">source</a><ahref="#impl-Layer%3CL,+S%3E"class="anchor">§</a><h3class="code-header">impl<L, S><aclass="struct"href="struct.Layer.html"title="struct tracing_subscriber::reload::Layer">Layer</a><L, S></h3></section></summary><divclass="impl-items"><detailsclass="toggle method-toggle"open><summary><sectionid="method.new"class="method"><aclass="src rightside"href="../../src/tracing_subscriber/reload.rs.html#263-270">source</a><h4class="code-header">pub fn <ahref="#method.new"class="fn">new</a>(inner: L) -> (Self, <aclass="struct"href="struct.Handle.html"title="struct tracing_subscriber::reload::Handle">Handle</a><L, S>)</h4></section></summary><divclass="docblock"><p>Wraps the given <ahref="../layer/trait.Layer.html"title="trait tracing_subscriber::layer::Layer"><code>Layer</code></a> or <ahref="../layer/trait.Filter.html"title="trait tracing_subscriber::layer::Filter"><code>Filter</code></a>, returning a <code>reload::Layer</code>
and a <code>Handle</code> that allows the inner value to be modified at runtime.</p>
</div></details><detailsclass="toggle method-toggle"open><summary><sectionid="method.handle"class="method"><aclass="src rightside"href="../../src/tracing_subscriber/reload.rs.html#276-281">source</a><h4class="code-header">pub fn <ahref="#method.handle"class="fn">handle</a>(&self) -><aclass="struct"href="struct.Handle.html"title="struct tracing_subscriber::reload::Handle">Handle</a><L, S></h4></section></summary><divclass="docblock"><p>Returns a <code>Handle</code> that can be used to reload the wrapped <ahref="../layer/trait.Layer.html"title="trait tracing_subscriber::layer::Layer"><code>Layer</code></a> or <ahref="crate::filter::Filter"><code>Filter</code></a>.</p>
</div></details></div></details></div><h2id="trait-implementations"class="section-header">Trait Implementations<ahref="#trait-implementations"class="anchor">§</a></h2><divid="trait-implementations-list"><detailsclass="toggle implementors-toggle"open><summary><sectionid="impl-Debug-for-Layer%3CL,+S%3E"class="impl"><aclass="src rightside"href="../../src/tracing_subscriber/reload.rs.html#83">source</a><ahref="#impl-Debug-for-Layer%3CL,+S%3E"class="anchor">§</a><h3class="code-header">impl<L: <aclass="trait"href="https://doc.rust-lang.org/1.76.0/core/fmt/trait.Debug.html"title="trait core::fmt::Debug">Debug</a>, S: <aclass="trait"href="https://doc.rust-lang.org/1.76.0/core/fmt/trait.Debug.html"title="trait core::fmt::Debug">Debug</a>><aclass="trait"href="https://doc.rust-lang.org/1.76.0/core/fmt/trait.Debug.html"title="trait core::fmt::Debug">Debug</a> for <aclass="struct"href="struct.Layer.html"title="struct tracing_subscriber::reload::Layer">Layer</a><L, S></h3></section></summary><divclass="impl-items"><detailsclass="toggle method-toggle"open><summary><sectionid="method.fmt"class="method trait-impl"><aclass="src rightside"href="../../src/tracing_subscriber/reload.rs.html#83">source</a><ahref="#method.fmt"class="anchor">§</a><h4class="code-header">fn <ahref="https://doc.rust-lang.org/1.76.0/core/fmt/trait.Debug.html#tymethod.fmt"class="fn">fmt</a>(&self, f: &mut <aclass="struct"href="https://doc.rust-lang.org/1.76.0/core/fmt/struct.Formatter.html"title="struct core::fmt::Formatter">Formatter</a><'_>) -><aclass="type"href="https://doc.rust-lang.org/1.76.0/core/fmt/type.Result.html"title="type core::fmt::Result">Result</a></h4></section></summary><divclass='docblock'>Formats the value using the given formatter. <ahref="https://doc.rust-lang.org/1.76.0/core/fmt/trait.Debug.html#tymethod.fmt">Read more</a></div></details></div></details><detailsclass="toggle implementors-toggle"open><summary><sectionid="impl-Filter%3CS%3E-for-Layer%3CL,+S%3E"class="impl"><aclass="src rightside"href="../../src/tracing_subscriber/reload.rs.html#211-255">source</a><ahref="#impl-Filter%3CS%3E-for-Layer%3CL,+S%3E"class="anchor">§</a><h3class="code-header">impl<S, L><aclass="trait"href="../layer/trait.Filter.html"title="trait tracing_subscriber::layer::Filter">Filter</a><S> for <aclass="struct"href="struct.Layer.html"title="struct tracing_subscriber::reload::Layer">Layer</a><L, S><divclass="where">where
<ahref="../../tracing_core/subscriber/struct.Interest.html#method.sometimes"title="associated function tracing_core::subscriber::Interest::sometimes">sometimes</a>, or <ahref="../../tracing_core/subscriber/struct.Interest.html#method.never"title="associated function tracing_core::subscriber::Interest::never">never</a> be interested in the given <ahref="../../tracing_core/metadata/struct.Metadata.html"title="struct tracing_core::metadata::Metadata"><code>Metadata</code></a>. <ahref="../layer/trait.Filter.html#method.callsite_enabled">Read more</a></div></details><detailsclass="toggle method-toggle"open><summary><sectionid="method.enabled"class="method trait-impl"><aclass="src rightside"href="../../src/tracing_subscriber/reload.rs.html#222-224">source</a><ahref="#method.enabled"class="anchor">§</a><h4class="code-header">fn <ahref="../layer/trait.Filter.html#tymethod.enabled"class="fn">enabled</a>(&self, metadata: &<aclass="struct"href="../../tracing_core/metadata/struct.Metadata.html"title="struct tracing_core::metadata::Metadata">Metadata</a><'_>, ctx: &<aclass="struct"href="../layer/struct.Context.html"title="struct tracing_subscriber::layer::Context">Context</a><'_, S>) -><aclass="primitive"href="https://doc.rust-lang.org/1.76.0/std/primitive.bool.html">bool</a></h4></section></summary><divclass='docblock'>Returns <code>true</code> if this layer is interested in a span or event with the
given <ahref="../../tracing_core/metadata/struct.Metadata.html"title="struct tracing_core::metadata::Metadata"><code>Metadata</code></a> in the current <ahref="../layer/struct.Context.html"title="struct tracing_subscriber::layer::Context"><code>Context</code></a>, similarly to
<ahref="../../tracing_core/subscriber/trait.Subscriber.html#tymethod.enabled"title="method tracing_core::subscriber::Subscriber::enabled"><code>Subscriber::enabled</code></a>. <ahref="../layer/trait.Filter.html#tymethod.enabled">Read more</a></div></details><detailsclass="toggle method-toggle"open><summary><sectionid="method.on_new_span"class="method trait-impl"><aclass="src rightside"href="../../src/tracing_subscriber/reload.rs.html#227-229">source</a><ahref="#method.on_new_span"class="anchor">§</a><h4class="code-header">fn <ahref="../layer/trait.Filter.html#method.on_new_span"class="fn">on_new_span</a>(&self, attrs: &<aclass="struct"href="../../tracing_core/span/struct.Attributes.html"title="struct tracing_core::span::Attributes">Attributes</a><'_>, id: &<aclass="struct"href="../../tracing_core/span/struct.Id.html"title="struct tracing_core::span::Id">Id</a>, ctx: <aclass="struct"href="../layer/struct.Context.html"title="struct tracing_subscriber::layer::Context">Context</a><'_, S>)</h4></section></summary><divclass='docblock'>Notifies this filter that a new span was constructed with the given
<code>Attributes</code> and <code>Id</code>. <ahref="../layer/trait.Filter.html#method.on_new_span">Read more</a></div></details><detailsclass="toggle method-toggle"open><summary><sectionid="method.on_record"class="method trait-impl"><aclass="src rightside"href="../../src/tracing_subscriber/reload.rs.html#232-234">source</a><ahref="#method.on_record"class="anchor">§</a><h4class="code-header">fn <ahref="../layer/trait.Filter.html#method.on_record"class="fn">on_record</a>(&self, span: &<aclass="struct"href="../../tracing_core/span/struct.Id.html"title="struct tracing_core::span::Id">Id</a>, values: &<aclass="struct"href="../../tracing_core/span/struct.Record.html"title="struct tracing_core::span::Record">Record</a><'_>, ctx: <aclass="struct"href="../layer/struct.Context.html"title="struct tracing_subscriber::layer::Context">Context</a><'_, S>)</h4></section></summary><divclass='docblock'>Notifies this filter that a span with the given <code>Id</code> recorded the given
<code>values</code>. <ahref="../layer/trait.Filter.html#method.on_record">Read more</a></div></details><detailsclass="toggle method-toggle"open><summary><sectionid="method.on_enter"class="method trait-impl"><aclass="src rightside"href="../../src/tracing_subscriber/reload.rs.html#237-239">source</a><ahref="#method.on_enter"class="anchor">§</a><h4class="code-header">fn <ahref="../layer/trait.Filter.html#method.on_enter"class="fn">on_enter</a>(&self, id: &<aclass="struct"href="../../tracing_core/span/struct.Id.html"title="struct tracing_core::span::Id">Id</a>, ctx: <aclass="struct"href="../layer/struct.Context.html"title="struct tracing_subscriber::layer::Context">Context</a><'_, S>)</h4></section></summary><divclass='docblock'>Notifies this filter that a span with the given ID was entered. <ahref="../layer/trait.Filter.html#method.on_enter">Read more</a></div></details><detailsclass="toggle method-toggle"open><summary><sectionid="method.on_exit"class="method trait-impl"><aclass="src rightside"href="../../src/tracing_subscriber/reload.rs.html#242-244">source</a><ahref="#method.on_exit"class="anchor">§</a><h4class="code-header">fn <ahref="../layer/trait.Filter.html#method.on_exit"class="fn">on_exit</a>(&self, id: &<aclass="struct"href="../../tracing_core/span/struct.Id.html"title="struct tracing_core::span::Id">Id</a>, ctx: <aclass="struct"href="../layer/struct.Context.html"title="struct tracing_subscriber::layer::Context">Context</a><'_, S>)</h4></section></summary><divclass='docblock'>Notifies this filter that a span with the given ID was exited. <ahref="../layer/trait.Filter.html#method.on_exit">Read more</a></div></details><detailsclass="toggle method-toggle"open><summary><sectionid="method.on_close"class="method trait-impl"><aclass="src rightside"href="../../src/tracing_subscriber/reload.rs.html#247-249">source</a><ahref="#method.on_close"class="anchor">§</a><h4class="code-header">fn <ahref="../layer/trait.Filter.html#method.on_close"class="fn">on_close</a>(&self, id: <aclass="struct"href="../../tracing_core/span/struct.Id.html"title="struct tracing_core::span::Id">Id</a>, ctx: <aclass="struct"href="../layer/struct.Context.html"title="struct tracing_subscriber::layer::Context">Context</a><'_, S>)</h4></section></summary><divclass='docblock'>Notifies this filter that a span with the given ID has been closed. <ahref="../layer/trait.Filter.html#method.on_close">Read more</a></div></details><detailsclass="toggle method-toggle"open><summary><sectionid="method.max_level_hint"class="method trait-impl"><aclass="src rightside"href="../../src/tracing_subscriber/reload.rs.html#252-254">source</a><ahref="#method.max_level_hint"class="anchor">§</a><h4class="code-header">fn <ahref="../layer/trait.Filter.html#method.max_level_hint"class="fn">max_level_hint</a>(&self) -><aclass="enum"href="https://doc.rust-lang.org/1.76.0/core/option/enum.Option.html"title="enum core::option::Option">Option</a><<aclass="struct"href="../filter/struct.LevelFilter.html"title="struct tracing_subscriber::filter::LevelFilter">LevelFilter</a>></h4></section></summary><divclass='docblock'>Returns an optional hint of the highest <ahref="../../tracing_core/metadata/struct.Level.html"title="struct tracing_core::metadata::Level">verbosity level</a> that
this <code>Filter</code> will enable. <ahref="../layer/trait.Filter.html#method.max_level_hint">Read more</a></div></details><detailsclass="toggle method-toggle"open><summary><sectionid="method.event_enabled"class="method trait-impl"><aclass="src rightside"href="../../src/tracing_subscriber/layer/mod.rs.html#1413-1416">source</a><ahref="#method.event_enabled"class="anchor">§</a><h4class="code-header">fn <ahref="../layer/trait.Filter.html#method.event_enabled"class="fn">event_enabled</a>(&self, event: &<aclass="struct"href="../../tracing_core/event/struct.Event.html"title="struct tracing_core::event::Event">Event</a><'_>, cx: &<aclass="struct"href="../layer/struct.Context.html"title="struct tracing_subscriber::layer::Context">Context</a><'_, S>) -><aclass="primitive"href="https://doc.rust-lang.org/1.76.0/std/primitive.bool.html">bool</a></h4></section></summary><divclass='docblock'>Called before the filtered [<code>Layer]'s [</code>on_event<code>], to determine if </code>on_event` should be called. <ahref="../layer/trait.Filter.html#method.event_enabled">Read more</a></div></details></div></details><detailsclass="toggle implementors-toggle"open><summary><sectionid="impl-Layer%3CS%3E-for-Layer%3CL,+S%3E"class="impl"><aclass="src rightside"href="../../src/tracing_subscriber/reload.rs.html#114-205">source</a><ahref="#impl-Layer%3CS%3E-for-Layer%3CL,+S%3E"class="anchor">§</a><h3class="code-header">impl<L, S><aclass="trait"href="../layer/trait.Layer.html"title="trait tracing_subscriber::layer::Layer">Layer</a><S> for <aclass="struct"href="struct.Layer.html"title="struct tracing_subscriber::reload::Layer">Layer</a><L, S><divclass="where">where
S: <aclass="trait"href="../../tracing_core/subscriber/trait.Subscriber.html"title="trait tracing_core::subscriber::Subscriber">Subscriber</a>,</div></h3></section></summary><divclass="impl-items"><detailsclass="toggle method-toggle"open><summary><sectionid="method.on_register_dispatch"class="method trait-impl"><aclass="src rightside"href="../../src/tracing_subscriber/reload.rs.html#119-121">source</a><ahref="#method.on_register_dispatch"class="anchor">§</a><h4class="code-header">fn <ahref="../layer/trait.Layer.html#method.on_register_dispatch"class="fn">on_register_dispatch</a>(&self, subscriber: &<aclass="struct"href="../../tracing_core/dispatcher/struct.Dispatch.html"title="struct tracing_core::dispatcher::Dispatch">Dispatch</a>)</h4></section></summary><divclass='docblock'>Performs late initialization when installing this layer as a
<ahref="../../tracing_core/subscriber/trait.Subscriber.html"title="trait tracing_core::subscriber::Subscriber"><code>Subscriber</code></a>. <ahref="../layer/trait.Layer.html#method.on_register_dispatch">Read more</a></div></details><detailsclass="toggle method-toggle"open><summary><sectionid="method.on_layer"class="method trait-impl"><aclass="src rightside"href="../../src/tracing_subscriber/reload.rs.html#123-125">source</a><ahref="#method.on_layer"class="anchor">§</a><h4class="code-header">fn <ahref="../layer/trait.Layer.html#method.on_layer"class="fn">on_layer</a>(&mut self, subscriber: <aclass="primitive"href="https://doc.rust-lang.org/1.76.0/std/primitive.reference.html">&mut S</a>)</h4></section></summary><divclass='docblock'>Performs late initialization when attaching a <code>Layer</code> to a
<ahref="../../tracing_core/subscriber/trait.Subscriber.html"title="trait tracing_core::subscriber::Subscriber"><code>Subscriber</code></a>. <ahref="../layer/trait.Layer.html#method.on_layer">Read more</a></div></details><detailsclass="toggle method-toggle"open><summary><sectionid="method.register_callsite"class="method trait-impl"><aclass="src rightside"href="../../src/tracing_subscriber/reload.rs.html#128-130">source</a><ahref="#method.register_callsite"class="anchor">§</a><h4class="code-header">fn <ahref="../layer/trait.Layer.html#method.register_callsite"class="fn">register_callsite</a>(&self, metadata: &'static <aclass="struct"href="../../tracing_core/metadata/struct.Metadata.html"title="struct tracing_core::metadata::Metadata">Metadata</a><'static>) -><aclass="struct"href="../../tracing_core/subscriber/struct.Interest.html"title="struct tracing_core::subscriber::Interest">Interest</a></h4></section></summary><divclass='docblock'>Registers a new callsite with this layer, returning whether or not
the layer is interested in being notified about the callsite, similarly
to <ahref="../../tracing_core/subscriber/trait.Subscriber.html#method.register_callsite"title="method tracing_core::subscriber::Subscriber::register_callsite"><code>Subscriber::register_callsite</code></a>. <ahref="../layer/trait.Layer.html#method.register_callsite">Read more</a></div></details><detailsclass="toggle method-toggle"open><summary><sectionid="method.enabled-1"class="method trait-impl"><aclass="src rightside"href="../../src/tracing_subscriber/reload.rs.html#133-135">source</a><ahref="#method.enabled-1"class="anchor">§</a><h4class="code-header">fn <ahref="../layer/trait.Layer.html#method.enabled"class="fn">enabled</a>(&self, metadata: &<aclass="struct"href="../../tracing_core/metadata/struct.Metadata.html"title="struct tracing_core::metadata::Metadata">Metadata</a><'_>, ctx: <aclass="struct"href="../layer/struct.Context.html"title="struct tracing_subscriber::layer::Context">Context</a><'_, S>) -><aclass="primitive"href="https://doc.rust-lang.org/1.76.0/std/primitive.bool.html">bool</a></h4></section></summary><divclass='docblock'>Returns <code>true</code> if this layer is interested in a span or event with the
given <code>metadata</code> in the current <ahref="../layer/struct.Context.html"title="struct tracing_subscriber::layer::Context"><code>Context</code></a>, similarly to
<ahref="../../tracing_core/subscriber/trait.Subscriber.html#tymethod.enabled"title="method tracing_core::subscriber::Subscriber::enabled"><code>Subscriber::enabled</code></a>. <ahref="../layer/trait.Layer.html#method.enabled">Read more</a></div></details><detailsclass="toggle method-toggle"open><summary><sectionid="method.on_new_span-1"class="method trait-impl"><aclass="src rightside"href="../../src/tracing_subscriber/reload.rs.html#138-140">source</a><ahref="#method.on_new_span-1"class="anchor">§</a><h4class="code-header">fn <ahref="../layer/trait.Layer.html#method.on_new_span"class="fn">on_new_span</a>(&self, attrs: &<aclass="struct"href="../../tracing_core/span/struct.Attributes.html"title="struct tracing_core::span::Attributes">Attributes</a><'_>, id: &<aclass="struct"href="../../tracing_core/span/struct.Id.html"title="struct tracing_core::span::Id">Id</a>, ctx: <aclass="struct"href="../layer/struct.Context.html"title="struct tracing_subscriber::layer::Context">Context</a><'_, S>)</h4></section></summary><divclass='docblock'>Notifies this layer that a new span was constructed with the given
<code>Attributes</code> and <code>Id</code>.</div></details><detailsclass="toggle method-toggle"open><summary><sectionid="method.on_record-1"class="method trait-impl"><aclass="src rightside"href="../../src/tracing_subscriber/reload.rs.html#143-145">source</a><ahref="#method.on_record-1"class="anchor">§</a><h4class="code-header">fn <ahref="../layer/trait.Layer.html#method.on_record"class="fn">on_record</a>(&self, span: &<aclass="struct"href="../../tracing_core/span/struct.Id.html"title="struct tracing_core::span::Id">Id</a>, values: &<aclass="struct"href="../../tracing_core/span/struct.Record.html"title="struct tracing_core::span::Record">Record</a><'_>, ctx: <aclass="struct"href="../layer/struct.Context.html"title="struct tracing_subscriber::layer::Context">Context</a><'_, S>)</h4></section></summary><divclass='docblock'>Notifies this layer that a span with the given <code>Id</code> recorded the given
<code>values</code>.</div></details><detailsclass="toggle method-toggle"open><summary><sectionid="method.on_follows_from"class="method trait-impl"><aclass="src rightside"href="../../src/tracing_subscriber/reload.rs.html#148-150">source</a><ahref="#method.on_follows_from"class="anchor">§</a><h4class="code-header">fn <ahref="../layer/trait.Layer.html#method.on_follows_from"class="fn">on_follows_from</a>(&self, span: &<aclass="struct"href="../../tracing_core/span/struct.Id.html"title="struct tracing_core::span::Id">Id</a>, follows: &<aclass="struct"href="../../tracing_core/span/struct.Id.html"title="struct tracing_core::span::Id">Id</a>, ctx: <aclass="struct"href="../layer/struct.Context.html"title="struct tracing_subscriber::layer::Context">Context</a><'_, S>)</h4></section></summary><divclass='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><detailsclass="toggle method-toggle"open><summary><sectionid="method.event_enabled-1"class="method trait-impl"><aclass="src rightside"href="../../src/tracing_subscriber/reload.rs.html#153-155">source</a><ahref="#method.event_enabled-1"class="anchor">§</a><h4class="code-header">fn <ahref="../layer/trait.Layer.html#method.event_enabled"class="fn">event_enabled</a>(&self, event: &<aclass="struct"href="../../tracing_core/event/struct.Event.html"title="struct tracing_core::event::Event">Event</a><'_>, ctx: <aclass="struct"href="../layer/struct.Context.html"title="struct tracing_subscriber::layer::Context">Context</a><'_, S>) -><aclass="primitive"href="https://doc.rust-lang.org/1.76.0/std/primitive.bool.html">bool</a></h4></section></summary><divclass='docblock'>Called before <ahref="../layer/trait.Layer.html#method.on_event"><code>on_event</code></a>, to determine if <code>on_event</code> should be called.</div></details><detailsclass="toggle method-toggle"open><summary><sectionid="method.on_event"class="method trait-impl"><aclass="src rightside"href="../../src/tracing_subscriber/reload.rs.html#158-160">source</a><ahref="#method.on_event"class="anchor">§</a><h4class="code-header">fn <ahref="../layer/trait.Layer.html#method.on_event"class="fn">on_event</a>(&self, event: &<aclass="struct"href="../../tracing_core/event/struct.Event.html"title="struct tracing_core::event::Event">Event</a><'_>, ctx: <aclass="struct"href="../layer/struct.Context.html"title="struct tracing_subscriber::layer::Context">Context</a><'_, S>)</h4></section></summary><divclass='docblock'>Notifies this layer that an event has occurred.</div></details><detailsclass="toggle method-toggle"open><summary><sectionid="method.on_enter-1"class="method trait-impl"><aclass="src rightside"href="../../src/tracing_subscriber/reload.rs.html#163-165">source</a><ahref="#method.on_enter-1"class="anchor">§</a><h4class="code-header">fn <ahref="../layer/trait.Layer.html#method.on_enter"class="fn">on_enter</a>(&self, id: &<aclass="struct"href="../../tracing_core/span/struct.Id.html"title="struct tracing_core::span::Id">Id</a>, ctx: <aclass="struct"href="../layer/struct.Context.html"title="struct tracing_subscriber::layer::Context">Context</a><'_, S>)</h4></section></summary><divclass='docblock'>Notifies this layer that a span with the given ID was entered.</div></details><detailsclass="toggle method-toggle"open><summary><sectionid="method.on_exit-1"class="method trait-impl"><aclass="src rightside"href="../../src/tracing_subscriber/reload.rs.html#168-170">source</a><ahref="#method.on_exit-1"class="anchor">§</a><h4class="code-header">fn <ahref="../layer/trait.Layer.html#method.on_exit"class="fn">on_exit</a>(&self, id: &<aclass="struct"href="../../tracing_core/span/struct.Id.html"title="struct tracing_core::span::Id">Id</a>, ctx: <aclass="struct"href="../layer/struct.Context.html"title="struct tracing_subscriber::layer::Context">Context</a><'_, S>)</h4></section></summary><divclass='docblock'>Notifies this layer that the span with the given ID was exited.</div></details><detailsclass="toggle method-toggle"open><summary><sectionid="method.on_close-1"class="method trait-impl"><aclass="src rightside"href="../../src/tracing_subscriber/reload.rs.html#173-175">source</a><ahref="#method.on_close-1"class="anchor">§</a><h4class="code-header">fn <ahref="../layer/trait.Layer.html#method.on_close"class="fn">on_close</a>(&self, id: <aclass="struct"href="../../tracing_core/span/struct.Id.html"title="struct tracing_core::span::Id">Id</a>, ctx: <aclass="struct"href="../layer/struct.Context.html"title="struct tracing_subscriber::layer::Context">Context</a><'_, S>)</h4></section></summary><divclass='docblock'>Notifies this layer that the span with the given ID has been closed.</div></details><detailsclass="toggle method-toggle"open><summary><section
subscriber returned a different ID.</div></details><detailsclass="toggle method-toggle"open><summary><sectionid="method.and_then"class="method trait-impl"><aclass="src rightside"href="../../src/tracing_subscriber/layer/mod.rs.html#1039-1046">source</a><ahref="#method.and_then"class="anchor">§</a><h4class="code-header">fn <ahref="../layer/trait.Layer.html#method.and_then"class="fn">and_then</a><L>(self, layer: L) -><aclass="struct"href="../layer/struct.Layered.html"title="struct tracing_subscriber::layer::Layered">Layered</a><L, Self, S><divclass="where">where
Self: <aclass="trait"href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Sized.html"title="trait core::marker::Sized">Sized</a>,</div></h4></section></summary><divclass='docblock'>Composes this layer around the given <code>Layer</code>, returning a <code>Layered</code>
Self: <aclass="trait"href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Sized.html"title="trait core::marker::Sized">Sized</a>,</div></h4></section></summary><divclass='docblock'>Composes this <code>Layer</code> with the given <ahref="../../tracing_core/subscriber/trait.Subscriber.html"title="trait tracing_core::subscriber::Subscriber"><code>Subscriber</code></a>, returning a
B: <aclass="trait"href="../layer/trait.Filter.html"title="trait tracing_subscriber::layer::Filter">Filter</a><S>,</div></h4></section></summary><divclass='docblock'>Combines this <ahref="../layer/trait.Filter.html"title="trait tracing_subscriber::layer::Filter"><code>Filter</code></a> with another <ahref="../layer/trait.Filter.html"title="trait tracing_subscriber::layer::Filter"><code>Filter</code></a> s so that spans and
events are enabled if and only if <em>both</em> filters return <code>true</code>. <ahref="../filter/trait.FilterExt.html#method.and">Read more</a></div></details><detailsclass="toggle method-toggle"open><summary><sectionid="method.or"class="method trait-impl"><aclass="src rightside"href="../../src/tracing_subscriber/filter/layer_filters/mod.rs.html#291-297">source</a><ahref="#method.or"class="anchor">§</a><h4class="code-header">fn <ahref="../filter/trait.FilterExt.html#method.or"class="fn">or</a><B>(self, other: B) -><aclass="struct"href="../filter/combinator/struct.Or.html"title="struct tracing_subscriber::filter::combinator::Or">Or</a><Self, B, S><divclass="where">where
B: <aclass="trait"href="../layer/trait.Filter.html"title="trait tracing_subscriber::layer::Filter">Filter</a><S>,</div></h4></section></summary><divclass='docblock'>Combines two <ahref="../layer/trait.Filter.html"title="trait tracing_subscriber::layer::Filter"><code>Filter</code></a>s so that spans and events are enabled if <em>either</em> filter
Self: <aclass="trait"href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Sized.html"title="trait core::marker::Sized">Sized</a>,</div></h4></section></summary><divclass='docblock'>Inverts <code>self</code>, returning a filter that enables spans and events only if
</div></details></div></details><detailsclass="toggle implementors-toggle"><summary><sectionid="impl-Instrument-for-T"class="impl"><aclass="src rightside"href="../../src/tracing/instrument.rs.html#325">source</a><ahref="#impl-Instrument-for-T"class="anchor">§</a><h3class="code-header">impl<T><aclass="trait"href="../../tracing/instrument/trait.Instrument.html"title="trait tracing::instrument::Instrument">Instrument</a> for T</h3></section></summary><divclass="impl-items"><detailsclass="toggle method-toggle"open><summary><sectionid="method.instrument"class="method trait-impl"><aclass="src rightside"href="../../src/tracing/instrument.rs.html#86">source</a><ahref="#method.instrument"class="anchor">§</a><h4class="code-header">fn <ahref="../../tracing/instrument/trait.Instrument.html#method.instrument"class="fn">instrument</a>(self, span: <aclass="struct"href="../../tracing/span/struct.Span.html"title="struct tracing::span::Span">Span</a>) -><aclass="struct"href="../../tracing/instrument/struct.Instrumented.html"title="struct tracing::instrument::Instrumented">Instrumented</a><Self></h4></section></summary><divclass='docblock'>Instruments this type with the provided <ahref="../../tracing/span/struct.Span.html"title="struct tracing::span::Span"><code>Span</code></a>, returning an
<code>Instrumented</code> wrapper. <ahref="../../tracing/instrument/trait.Instrument.html#method.instrument">Read more</a></div></details><detailsclass="toggle method-toggle"open><summary><sectionid="method.in_current_span"class="method trait-impl"><aclass="src rightside"href="../../src/tracing/instrument.rs.html#128">source</a><ahref="#method.in_current_span"class="anchor">§</a><h4class="code-header">fn <ahref="../../tracing/instrument/trait.Instrument.html#method.in_current_span"class="fn">in_current_span</a>(self) -><aclass="struct"href="../../tracing/instrument/struct.Instrumented.html"title="struct tracing::instrument::Instrumented">Instrumented</a><Self></h4></section></summary><divclass='docblock'>Instruments this type with the <ahref="../../tracing/span/struct.Span.html#method.current"title="associated function tracing::span::Span::current">current</a><ahref="../../tracing/span/struct.Span.html"title="struct tracing::span::Span"><code>Span</code></a>, returning an
<code>Instrumented</code> wrapper. <ahref="../../tracing/instrument/trait.Instrument.html#method.in_current_span">Read more</a></div></details></div></details><detailsclass="toggle implementors-toggle"><summary><sectionid="impl-Into%3CU%3E-for-T"class="impl"><aclass="src rightside"href="https://doc.rust-lang.org/1.76.0/src/core/convert/mod.rs.html#747-749">source</a><ahref="#impl-Into%3CU%3E-for-T"class="anchor">§</a><h3class="code-header">impl<T, U><aclass="trait"href="https://doc.rust-lang.org/1.76.0/core/convert/trait.Into.html"title="trait core::convert::Into">Into</a><U> for T<divclass="where">where
<p>That is, this conversion is whatever the implementation of
<code><ahref="https://doc.rust-lang.org/1.76.0/core/convert/trait.From.html"title="trait core::convert::From">From</a><T> for U</code> chooses to do.</p>
</div></details></div></details><detailsclass="toggle implementors-toggle"><summary><sectionid="impl-TryFrom%3CU%3E-for-T"class="impl"><aclass="src rightside"href="https://doc.rust-lang.org/1.76.0/src/core/convert/mod.rs.html#803-805">source</a><ahref="#impl-TryFrom%3CU%3E-for-T"class="anchor">§</a><h3class="code-header">impl<T, U><aclass="trait"href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html"title="trait core::convert::TryFrom">TryFrom</a><U> for T<divclass="where">where
U: <aclass="trait"href="https://doc.rust-lang.org/1.76.0/core/convert/trait.Into.html"title="trait core::convert::Into">Into</a><T>,</div></h3></section></summary><divclass="impl-items"><detailsclass="toggle"open><summary><sectionid="associatedtype.Error"class="associatedtype trait-impl"><ahref="#associatedtype.Error"class="anchor">§</a><h4class="code-header">type <ahref="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html#associatedtype.Error"class="associatedtype">Error</a> = <aclass="enum"href="https://doc.rust-lang.org/1.76.0/core/convert/enum.Infallible.html"title="enum core::convert::Infallible">Infallible</a></h4></section></summary><divclass='docblock'>The type returned in the event of a conversion error.</div></details><detailsclass="toggle method-toggle"open><summary><sectionid="method.try_from"class="method trait-impl"><aclass="src rightside"href="https://doc.rust-lang.org/1.76.0/src/core/convert/mod.rs.html#810">source</a><ahref="#method.try_from"class="anchor">§</a><h4class="code-header">fn <ahref="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html#tymethod.try_from"class="fn">try_from</a>(value: U) -><aclass="enum"href="https://doc.rust-lang.org/1.76.0/core/result/enum.Result.html"title="enum core::result::Result">Result</a><T, <T as <aclass="trait"href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html"title="trait core::convert::TryFrom">TryFrom</a><U>>::<aclass="associatedtype"href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html#associatedtype.Error"title="type core::convert::TryFrom::Error">Error</a>></h4></section></summary><divclass='docblock'>Performs the conversion.</div></details></div></details><detailsclass="toggle implementors-toggle"><summary><sectionid="impl-TryInto%3CU%3E-for-T"class="impl"><aclass="src rightside"href="https://doc.rust-lang.org/1.76.0/src/core/convert/mod.rs.html#788-790">source</a><ahref="#impl-TryInto%3CU%3E-for-T"class="anchor">§</a><h3class="code-header">impl<T, U><aclass="trait"href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryInto.html"title="trait core::convert::TryInto">TryInto</a><U> for T<divclass="where">where
U: <aclass="trait"href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html"title="trait core::convert::TryFrom">TryFrom</a><T>,</div></h3></section></summary><divclass="impl-items"><detailsclass="toggle"open><summary><sectionid="associatedtype.Error-1"class="associatedtype trait-impl"><ahref="#associatedtype.Error-1"class="anchor">§</a><h4class="code-header">type <ahref="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryInto.html#associatedtype.Error"class="associatedtype">Error</a> = <U as <aclass="trait"href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html"title="trait core::convert::TryFrom">TryFrom</a><T>>::<aclass="associatedtype"href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html#associatedtype.Error"title="type core::convert::TryFrom::Error">Error</a></h4></section></summary><divclass='docblock'>The type returned in the event of a conversion error.</div></details><detailsclass="toggle method-toggle"open><summary><sectionid="method.try_into"class="method trait-impl"><aclass="src rightside"href="https://doc.rust-lang.org/1.76.0/src/core/convert/mod.rs.html#795">source</a><ahref="#method.try_into"class="anchor">§</a><h4class="code-header">fn <ahref="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryInto.html#tymethod.try_into"class="fn">try_into</a>(self) -><aclass="enum"href="https://doc.rust-lang.org/1.76.0/core/result/enum.Result.html"title="enum core::result::Result">Result</a><U, <U as <aclass="trait"href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html"title="trait core::convert::TryFrom">TryFrom</a><T>>::<aclass="associatedtype"href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html#associatedtype.Error"title="type core::convert::TryFrom::Error">Error</a>></h4></section></summary><divclass='docblock'>Performs the conversion.</div></details></div></details><detailsclass="toggle implementors-toggle"><summary><sectionid="impl-WithSubscriber-for-T"class="impl"><aclass="src rightside"href="../../src/tracing/instrument.rs.html#393">source</a><ahref="#impl-WithSubscriber-for-T"class="anchor">§</a><h3class="code-header">impl<T><aclass="trait"href="../../tracing/instrument/trait.WithSubscriber.html"title="trait tracing::instrument::WithSubscriber">WithSubscriber</a> for T</h3></section></summary><divclass="impl-items"><detailsclass="toggle method-toggle"open><summary><sectionid="method.with_subscriber-1"class="method trait-impl"><aclass="src rightside"href="../../src/tracing/instrument.rs.html#176-178">source</a><ahref="#method.with_subscriber-1"class="anchor">§</a><h4class="code-header">fn <ahref="../../tracing/instrument/trait.WithSubscriber.html#method.with_subscriber"class="fn">with_subscriber</a><S>(self, subscriber: S) -><aclass="struct"href="../../tracing/instrument/struct.WithDispatch.html"title="struct tracing::instrument::WithDispatch">WithDispatch</a><Self><divclass="where">where
S: <aclass="trait"href="https://doc.rust-lang.org/1.76.0/core/convert/trait.Into.html"title="trait core::convert::Into">Into</a><<aclass="struct"href="../../tracing_core/dispatcher/struct.Dispatch.html"title="struct tracing_core::dispatcher::Dispatch">Dispatch</a>>,</div></h4></section></summary><divclass='docblock'>Attaches the provided <ahref="../../tracing_core/subscriber/trait.Subscriber.html"title="trait tracing_core::subscriber::Subscriber"><code>Subscriber</code></a> to this type, returning a
<ahref="../../tracing/instrument/struct.WithDispatch.html"title="struct tracing::instrument::WithDispatch"><code>WithDispatch</code></a> wrapper. <ahref="../../tracing/instrument/trait.WithSubscriber.html#method.with_subscriber">Read more</a></div></details><detailsclass="toggle method-toggle"open><summary><sectionid="method.with_current_subscriber"class="method trait-impl"><aclass="src rightside"href="../../src/tracing/instrument.rs.html#228">source</a><ahref="#method.with_current_subscriber"class="anchor">§</a><h4class="code-header">fn <ahref="../../tracing/instrument/trait.WithSubscriber.html#method.with_current_subscriber"class="fn">with_current_subscriber</a>(self) -><aclass="struct"href="../../tracing/instrument/struct.WithDispatch.html"title="struct tracing::instrument::WithDispatch">WithDispatch</a><Self></h4></section></summary><divclass='docblock'>Attaches the current <ahref="../../tracing/dispatcher/index.html#setting-the-default-subscriber"title="mod tracing::dispatcher">default</a><ahref="../../tracing_core/subscriber/trait.Subscriber.html"title="trait tracing_core::subscriber::Subscriber"><code>Subscriber</code></a> to this type, returning a
