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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 shared, reusable store for spans."><title>Registry in tracing_subscriber::registry - Rust</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/SourceSerif4-Regular-46f98efaafac5295.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/FiraSans-Regular-018c141bf0843ffd.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/FiraSans-Medium-8f9a781e4970d388.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/SourceCodePro-Regular-562dcc5011b6de7d.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/SourceCodePro-Semibold-d899c5a5c4aeb14a.ttf.woff2"><link rel="stylesheet" href="../../static.files/normalize-76eba96aa4d2e634.css"><link rel="stylesheet" href="../../static.files/rustdoc-ac92e1bbe349e143.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="1.76.0 (07dca489a 2024-02-04)" data-channel="1.76.0" data-search-js="search-2b6ce74ff89ae146.js" data-settings-js="settings-4313503d2e1961c2.js" ><script src="../../static.files/storage-f2adc0d6ca4d09fb.js"></script><script defer src="sidebar-items.js"></script><script defer src="../../static.files/main-305769736d49e732.js"></script><noscript><link rel="stylesheet" href="../../static.files/noscript-feafe1bb7466e4bd.css"></noscript><link rel="alternate icon" type="image/png" href="../../static.files/favicon-16x16-8b506e7a72182f1c.png"><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 struct"><!--[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">&#9776;</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="#">Registry</a></h2><div class="sidebar-elems"><section><h3><a href="#trait-implementations">Trait Implementations</a></h3><ul class="block trait-implementation"><li><a href="#impl-Debug-for-Registry">Debug</a></li><li><a href="#impl-Default-for-Registry">Default</a></li><li><a href="#impl-LookupSpan%3C'a%3E-for-Registry">LookupSpan&lt;&#x27;a&gt;</a></li><li><a href="#impl-Subscriber-for-Registry">Subscriber</a></li></ul><h3><a href="#synthetic-implementations">Auto Trait Implementations</a></h3><ul class="block synthetic-implementation"><li><a href="#impl-UnwindSafe-for-Registry">!UnwindSafe</a></li><li><a href="#impl-RefUnwindSafe-for-Registry">RefUnwindSafe</a></li><li><a href="#impl-Send-for-Registry">Send</a></li><li><a href="#impl-Sync-for-Registry">Sync</a></li><li><a href="#impl-Unpin-for-Registry">Unpin</a></li></ul><h3><a href="#blanket-implementations">Blanket Implementations</a></h3><ul class="block blanket-implementation"><li><a href="#impl-Any-for-T">Any</a></li><li><a href="#impl-Borrow%3CT%3E-for-T">Borrow&lt;T&gt;</a></li><li><a href="#impl-BorrowMut%3CT%3E-for-T">BorrowMut&lt;T&gt;</a></li><li><a href="#impl-From%3CT%3E-for-T">From&lt;T&gt;</a></li><li><a href="#impl-Instrument-for-T">Instrument</a></li><li><a hre
<main><div class="width-limiter"><nav class="sub"><form class="search-form"><span></span><div id="sidebar-button" tabindex="-1"><a href="../../tracing_subscriber/all.html" title="show sidebar"></a></div><input class="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"><div id="help-button" tabindex="-1"><a href="../../help.html" title="help">?</a></div><div id="settings-menu" tabindex="-1"><a href="../../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../../static.files/wheel-7b819b6101059cd0.svg"></a></div></form></nav><section id="main-content" class="content"><div class="main-heading"><h1>Struct <a href="../index.html">tracing_subscriber</a>::<wbr><a href="index.html">registry</a>::<wbr><a class="struct" href="#">Registry</a><button id="copy-path" title="Copy item path to clipboard"><img src="../../static.files/clipboard-7571035ce49a181d.svg" width="19" height="18" alt="Copy item path"></button></h1><span class="out-of-band"><a class="src" href="../../src/tracing_subscriber/registry/sharded.rs.html#92-96">source</a> · <button id="toggle-all-docs" title="collapse all docs">[<span>&#x2212;</span>]</button></span></div><pre class="rust item-decl"><code>pub struct Registry { <span class="comment">/* private fields */</span> }</code></pre><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>A shared, reusable store for spans.</p>
<p>A <code>Registry</code> is a <a href="../../tracing_core/subscriber/trait.Subscriber.html" title="trait tracing_core::subscriber::Subscriber"><code>Subscriber</code></a> around which multiple <a href="../layer/trait.Layer.html" title="trait tracing_subscriber::layer::Layer"><code>Layer</code></a>s
implementing various behaviors may be <a href="../layer/trait.Layer.html#composing-layers" title="trait tracing_subscriber::layer::Layer">added</a>. Unlike other types
implementing <code>Subscriber</code>, <code>Registry</code> does not actually record traces itself:
instead, it collects and stores span data that is exposed to any <a href="../layer/trait.Layer.html" title="trait tracing_subscriber::layer::Layer"><code>Layer</code></a>s
wrapping it through implementations of the <a href="trait.LookupSpan.html" title="trait tracing_subscriber::registry::LookupSpan"><code>LookupSpan</code></a> trait.
The <code>Registry</code> is responsible for storing span metadata, recording
relationships between spans, and tracking which spans are active and which
are closed. In addition, it provides a mechanism for <a href="../layer/trait.Layer.html" title="trait tracing_subscriber::layer::Layer"><code>Layer</code></a>s to store
user-defined per-span data, called <a href="struct.Extensions.html" title="struct tracing_subscriber::registry::Extensions">extensions</a>, in the registry. This
allows <a href="../layer/trait.Layer.html" title="trait tracing_subscriber::layer::Layer"><code>Layer</code></a>-specific data to benefit from the <code>Registry</code>s
high-performance concurrent storage.</p>
<p>This registry is implemented using a <a href="../../sharded_slab/index.html" title="mod sharded_slab">lock-free sharded slab</a>, and is
highly optimized for concurrent access.</p>
<h2 id="span-id-generation"><a href="#span-id-generation">Span ID Generation</a></h2>
<p>Span IDs are not globally unique, but the registry ensures that
no two currently active spans have the same ID within a process.</p>
<p>One of the primary responsibilities of the registry is to generate <a href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">span
IDs</a>. Therefore, its important for other code that interacts with the
registry, such as <a href="../layer/trait.Layer.html" title="trait tracing_subscriber::layer::Layer"><code>Layer</code></a>s, to understand the guarantees of the
span IDs that are generated.</p>
<p>The registrys span IDs are guaranteed to be unique <strong>at a given point
in time</strong>. This means that an active span will never be assigned the
same ID as another <strong>currently active</strong> span. However, the registry
<strong>will</strong> eventually reuse the IDs of <a href="https://docs.rs/tracing/latest/tracing/span/index.html#closing-spans">closed</a> spans, although an ID
will never be reassigned immediately after a span has closed.</p>
<p>Spans are not <a href="../../tracing_core/subscriber/trait.Subscriber.html#method.try_close" title="method tracing_core::subscriber::Subscriber::try_close">considered closed</a> by the <code>Registry</code> until <em>every</em>
<a href="https://docs.rs/tracing/latest/tracing/span/struct.Span.html"><code>Span</code></a> reference with that ID has been dropped.</p>
<p>Thus: span IDs generated by the registry should be considered unique
only at a given point in time, and only relative to other spans
generated by the same process. Two spans with the same ID will not exist
in the same process concurrently. However, if historical span data is
being stored, the same ID may occur for multiple spans times in that
data. If spans must be uniquely identified in historical data, the user
code storing this data must assign its own unique identifiers to those
spans. A counter is generally sufficient for this.</p>
<p>Similarly, span IDs generated by the registry are not unique outside of
a given process. Distributed tracing systems may require identifiers
that are unique across multiple processes on multiple machines (for
example, <a href="https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/trace/api.md#spancontext">OpenTelemetrys <code>SpanId</code>s and <code>TraceId</code>s</a>). <code>tracing</code> span
IDs generated by the registry should <strong>not</strong> be used for this purpose.
Instead, code which integrates with a distributed tracing system should
generate and propagate its own IDs according to the rules specified by
the distributed tracing system. These IDs can be associated with
<code>tracing</code> spans using <a href="../../tracing_core/field/index.html" title="mod tracing_core::field">fields</a> and/or <a href="trait.SpanData.html#tymethod.extensions_mut" title="method tracing_subscriber::registry::SpanData::extensions_mut">stored span data</a>.</p>
</div></details><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-Debug-for-Registry" class="impl"><a class="src rightside" href="../../src/tracing_subscriber/registry/sharded.rs.html#91">source</a><a href="#impl-Debug-for-Registry" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/fmt/trait.Debug.html" title="trait core::fmt::Debug">Debug</a> for <a class="struct" href="struct.Registry.html" title="struct tracing_subscriber::registry::Registry">Registry</a></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.fmt" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/registry/sharded.rs.html#91">source</a><a href="#method.fmt" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/fmt/trait.Debug.html#tymethod.fmt" class="fn">fmt</a>(&amp;self, f: &amp;mut <a class="struct" href="https://doc.rust-lang.org/1.76.0/core/fmt/struct.Formatter.html" title="struct core::fmt::Formatter">Formatter</a>&lt;'_&gt;) -&gt; <a class="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><div class='docblock'>Formats the value using the given formatter. <a href="https://doc.rust-lang.org/1.76.0/core/fmt/trait.Debug.html#tymethod.fmt">Read more</a></div></details></div></details><details class="toggle implementors-toggle" open><summary><section id="impl-Default-for-Registry" class="impl"><a class="src rightside" href="../../src/tracing_subscriber/registry/sharded.rs.html#135-143">source</a><a href="#impl-Default-for-Registry" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/default/trait.Default.html" title="trait core::default::Default">Default</a> for <a class="struct" href="struct.Registry.html" title="struct tracing_subscriber::registry::Registry">Registry</a></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.default" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/registry/sharded.rs.html#136-142">source</a><a href="#method.default" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/default/trait.Default.html#tymethod.default" class="fn">default</a>() -&gt; Self</h4></section></summary><div class='docblock'>Returns the “default value” for a type. <a href="https://doc.rust-lang.org/1.76.0/core/default/trait.Default.html#tymethod.default">Read more</a></div></details></div></details><details class="toggle implementors-toggle" open><summary><section id="impl-LookupSpan%3C'a%3E-for-Registry" class="impl"><a class="src rightside" href="../../src/tracing_subscriber/registry/sharded.rs.html#369-382">source</a><a href="#impl-LookupSpan%3C'a%3E-for-Registry" class="anchor">§</a><h3 class="code-header">impl&lt;'a&gt; <a class="trait" href="trait.LookupSpan.html" title="trait tracing_subscriber::registry::LookupSpan">LookupSpan</a>&lt;'a&gt; for <a class="struct" href="struct.Registry.html" title="struct tracing_subscriber::registry::Registry">Registry</a></h3></section></summary><div class="impl-items"><details class="toggle" open><summary><section id="associatedtype.Data" class="associatedtype trait-impl"><a href="#associatedtype.Data" class="anchor">§</a><h4 class="code-header">type <a href="trait.LookupSpan.html#associatedtype.Data" class="associatedtype">Data</a> = <a class="struct" href="struct.Data.html" title="struct tracing_subscriber::registry::Data">Data</a>&lt;'a&gt;</h4></section></summary><div class='docblock'>The type of span data stored in this registry.</div></details><details class="toggle method-toggle" open><summary><section id="metho
<a href="../../tracing_core/subscriber/trait.Subscriber.html" title="trait tracing_core::subscriber::Subscriber"><code>Subscriber</code></a>. <a href="trait.LookupSpan.html#method.register_filter">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.span" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/registry/mod.rs.html#118-129">source</a><a href="#method.span" class="anchor">§</a><h4 class="code-header">fn <a href="trait.LookupSpan.html#method.span" class="fn">span</a>(&amp;'a self, id: &amp;<a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>) -&gt; <a class="enum" href="https://doc.rust-lang.org/1.76.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a>&lt;<a class="struct" href="struct.SpanRef.html" title="struct tracing_subscriber::registry::SpanRef">SpanRef</a>&lt;'_, Self&gt;&gt;<div class="where">where
Self: <a class="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><div class='docblock'>Returns a <a href="struct.SpanRef.html" title="struct tracing_subscriber::registry::SpanRef"><code>SpanRef</code></a> for the span with the given <code>Id</code>, if it exists. <a href="trait.LookupSpan.html#method.span">Read more</a></div></details></div></details><details class="toggle implementors-toggle" open><summary><section id="impl-Subscriber-for-Registry" class="impl"><a class="src rightside" href="../../src/tracing_subscriber/registry/sharded.rs.html#220-367">source</a><a href="#impl-Subscriber-for-Registry" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="../../tracing_core/subscriber/trait.Subscriber.html" title="trait tracing_core::subscriber::Subscriber">Subscriber</a> for <a class="struct" href="struct.Registry.html" title="struct tracing_subscriber::registry::Registry">Registry</a></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.record" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/registry/sharded.rs.html#274">source</a><a href="#method.record" class="anchor">§</a><h4 class="code-header">fn <a href="../../tracing_core/subscriber/trait.Subscriber.html#tymethod.record" class="fn">record</a>(&amp;self, _: &amp;<a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>, _: &amp;<a class="struct" href="../../tracing_core/span/struct.Record.html" title="struct tracing_core::span::Record">Record</a>&lt;'_&gt;)</h4></section></summary><div class="docblock"><p>This is intentionally not implemented, as recording fields
on a span is the responsibility of layers atop of this registry.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.event" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/registry/sharded.rs.html#287">source</a><a href="#method.event" class="anchor">§</a><h4 class="code-header">fn <a href="../../tracing_core/subscriber/trait.Subscriber.html#tymethod.event" class="fn">event</a>(&amp;self, _: &amp;<a class="struct" href="../../tracing_core/event/struct.Event.html" title="struct tracing_core::event::Event">Event</a>&lt;'_&gt;)</h4></section></summary><div class="docblock"><p>This is intentionally not implemented, as recording events
is the responsibility of layers atop of this registry.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.try_close" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/registry/sharded.rs.html#346-366">source</a><a href="#method.try_close" class="anchor">§</a><h4 class="code-header">fn <a href="../../tracing_core/subscriber/trait.Subscriber.html#method.try_close" class="fn">try_close</a>(&amp;self, id: <a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.bool.html">bool</a></h4></section></summary><div class="docblock"><p>Decrements the reference count of the span with the given <code>id</code>, and
removes the span if it is zero.</p>
<p>The allocated span slot will be reused when a new span is created.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.register_callsite" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/registry/sharded.rs.html#221-227">source</a><a href="#method.register_callsite" class="anchor">§</a><h4 class="code-header">fn <a href="../../tracing_core/subscriber/trait.Subscriber.html#method.register_callsite" class="fn">register_callsite</a>(&amp;self, _: &amp;'static <a class="struct" href="../../tracing_core/metadata/struct.Metadata.html" title="struct tracing_core::metadata::Metadata">Metadata</a>&lt;'static&gt;) -&gt; <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 <a href="../../tracing_core/callsite/index.html" title="mod tracing_core::callsite">callsite</a> with this subscriber, returning whether or not
the subscriber is interested in being notified about the callsite. <a href="../../tracing_core/subscriber/trait.Subscriber.html#method.register_callsite">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.enabled" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/registry/sharded.rs.html#229-234">source</a><a href="#method.enabled" class="anchor">§</a><h4 class="code-header">fn <a href="../../tracing_core/subscriber/trait.Subscriber.html#tymethod.enabled" class="fn">enabled</a>(&amp;self, _: &amp;<a class="struct" href="../../tracing_core/metadata/struct.Metadata.html" title="struct tracing_core::metadata::Metadata">Metadata</a>&lt;'_&gt;) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.bool.html">bool</a></h4></section></summary><div class='docblock'>Returns true if a span or event with the specified <a href="../../tracing_core/metadata/struct.Metadata.html" title="struct tracing_core::metadata::Metadata">metadata</a> would be
recorded. <a href="../../tracing_core/subscriber/trait.Subscriber.html#tymethod.enabled">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.new_span" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/registry/sharded.rs.html#237-269">source</a><a href="#method.new_span" class="anchor">§</a><h4 class="code-header">fn <a href="../../tracing_core/subscriber/trait.Subscriber.html#tymethod.new_span" class="fn">new_span</a>(&amp;self, attrs: &amp;<a class="struct" href="../../tracing_core/span/struct.Attributes.html" title="struct tracing_core::span::Attributes">Attributes</a>&lt;'_&gt;) -&gt; <a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a></h4></section></summary><div class='docblock'>Visit the construction of a new span, returning a new <a href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">span ID</a> for the
span being constructed. <a href="../../tracing_core/subscriber/trait.Subscriber.html#tymethod.new_span">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.record_follows_from" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/registry/sharded.rs.html#276">source</a><a href="#method.record_follows_from" class="anchor">§</a><h4 class="code-header">fn <a href="../../tracing_core/subscriber/trait.Subscriber.html#tymethod.record_follows_from" class="fn">record_follows_from</a>(&amp;self, _span: &amp;<a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>, _follows: &amp;<a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>)</h4></section></summary><div class='docblock'>Adds an indication that <code>span</code> follows from the span with the id
<code>follows</code>. <a href="../../tracing_core/subscriber/trait.Subscriber.html#tymethod.record_follows_from">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.event_enabled" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/registry/sharded.rs.html#278-283">source</a><a href="#method.event_enabled" class="anchor">§</a><h4 class="code-header">fn <a href="../../tracing_core/subscriber/trait.Subscriber.html#method.event_enabled" class="fn">event_enabled</a>(&amp;self, _event: &amp;<a class="struct" href="../../tracing_core/event/struct.Event.html" title="struct tracing_core::event::Event">Event</a>&lt;'_&gt;) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.bool.html">bool</a></h4></section></summary><div class='docblock'>Determine if an <a href="../../tracing_core/event/struct.Event.html" title="struct tracing_core::event::Event"><code>Event</code></a> should be recorded. <a href="../../tracing_core/subscriber/trait.Subscriber.html#method.event_enabled">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.enter" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/registry/sharded.rs.html#289-298">source</a><a href="#method.enter" class="anchor">§</a><h4 class="code-header">fn <a href="../../tracing_core/subscriber/trait.Subscriber.html#tymethod.enter" class="fn">enter</a>(&amp;self, id: &amp;<a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>)</h4></section></summary><div class='docblock'>Records that a span has been entered. <a href="../../tracing_core/subscriber/trait.Subscriber.html#tymethod.enter">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.exit" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/registry/sharded.rs.html#300-306">source</a><a href="#method.exit" class="anchor">§</a><h4 class="code-header">fn <a href="../../tracing_core/subscriber/trait.Subscriber.html#tymethod.exit" class="fn">exit</a>(&amp;self, id: &amp;<a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>)</h4></section></summary><div class='docblock'>Records that a span has been exited. <a href="../../tracing_core/subscriber/trait.Subscriber.html#tymethod.exit">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.clone_span" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/registry/sharded.rs.html#308-328">source</a><a href="#method.clone_span" class="anchor">§</a><h4 class="code-header">fn <a href="../../tracing_core/subscriber/trait.Subscriber.html#method.clone_span" class="fn">clone_span</a>(&amp;self, id: &amp;<a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>) -&gt; <a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a></h4></section></summary><div class='docblock'>Notifies the subscriber that a <a href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">span ID</a> has been cloned. <a href="../../tracing_core/subscriber/trait.Subscriber.html#method.clone_span">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.current_span" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/registry/sharded.rs.html#330-340">source</a><a href="#method.current_span" class="anchor">§</a><h4 class="code-header">fn <a href="../../tracing_core/subscriber/trait.Subscriber.html#method.current_span" class="fn">current_span</a>(&amp;self) -&gt; <a class="struct" href="../../tracing_core/span/struct.Current.html" title="struct tracing_core::span::Current">Current</a></h4></section></summary><div class='docblock'>Returns a type representing this subscribers v
enable, or <code>None</code>, if the subscriber does not implement level-based
filtering or chooses not to implement this method. <a href="../../tracing_core/subscriber/trait.Subscriber.html#method.max_level_hint">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.drop_span" class="method trait-impl"><a class="src rightside" href="../../src/tracing_core/subscriber.rs.html#407">source</a><a href="#method.drop_span" class="anchor">§</a><h4 class="code-header">fn <a href="../../tracing_core/subscriber/trait.Subscriber.html#method.drop_span" class="fn">drop_span</a>(&amp;self, _id: <a class="struct" href="../../tracing_core/span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>)</h4></section></summary><span class="item-info"><div class="stab deprecated"><span class="emoji">👎</span><span>Deprecated since 0.1.2: use <code>Subscriber::try_close</code> instead</span></div></span><div class='docblock'><strong>This method is deprecated.</strong> <a href="../../tracing_core/subscriber/trait.Subscriber.html#method.drop_span">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.downcast_raw" class="method trait-impl"><a class="src rightside" href="../../src/tracing_core/subscriber.rs.html#495">source</a><a href="#method.downcast_raw" class="anchor">§</a><h4 class="code-header">unsafe fn <a href="../../tracing_core/subscriber/trait.Subscriber.html#method.downcast_raw" class="fn">downcast_raw</a>(&amp;self, id: <a class="struct" href="https://doc.rust-lang.org/1.76.0/core/any/struct.TypeId.html" title="struct core::any::TypeId">TypeId</a>) -&gt; <a class="enum" href="https://doc.rust-lang.org/1.76.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.pointer.html">*const </a><a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.unit.html">()</a>&gt;</h4></section></summary><div class='docblock'>If <code>self</code> is the same type as the provided <code>TypeId</code>, returns an untyped
<code>*const</code> pointer to that type. Otherwise, returns <code>None</code>. <a href="../../tracing_core/subscriber/trait.Subscriber.html#method.downcast_raw">Read more</a></div></details></div></details></div><h2 id="synthetic-implementations" class="section-header">Auto Trait Implementations<a href="#synthetic-implementations" class="anchor">§</a></h2><div id="synthetic-implementations-list"><section id="impl-RefUnwindSafe-for-Registry" class="impl"><a href="#impl-RefUnwindSafe-for-Registry" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/panic/unwind_safe/trait.RefUnwindSafe.html" title="trait core::panic::unwind_safe::RefUnwindSafe">RefUnwindSafe</a> for <a class="struct" href="struct.Registry.html" title="struct tracing_subscriber::registry::Registry">Registry</a></h3></section><section id="impl-Send-for-Registry" class="impl"><a href="#impl-Send-for-Registry" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> for <a class="struct" href="struct.Registry.html" title="struct tracing_subscriber::registry::Registry">Registry</a></h3></section><section id="impl-Sync-for-Registry" class="impl"><a href="#impl-Sync-for-Registry" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a> for <a class="struct" href="struct.Registry.html" title="struct tracing_subscriber::registry::Registry">Registry</a></h3></section><section id="impl-Unpin-for-Registry" class="impl"><a href="#impl-Unpin-for-Registry" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a> for <a class="struct" href="struct.Registry.html" title="struct tracing_subscriber::registry::Registry">Registry</a></h3></section><section id="impl-UnwindSafe-for-Registry" class="impl"><a href="#impl-UnwindSafe-for-Registry" class="anchor">§</a><h3 class="code-header">impl !<a class="trait" href="https://doc.rust-lang.org/1.76.0/core/panic/unwind_safe/trait.UnwindSafe.html" title="trait core::panic::unwind_safe::UnwindSafe">UnwindSafe</a> for <a class="struct" href="struct.Registry.html" title="struct tracing_subscriber::registry::Registry">Registry</a></h3></section></div><h2 id="blanket-implementations" class="section-header">Blanket Implementations<a href="#blanket-implementations" class="anchor">§</a></h2><div id="blanket-implementations-list"><details class="toggle implementors-toggle"><summary><section id="impl-Any-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/any.rs.html#140">source</a><a href="#impl-Any-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/any/trait.Any.html" title="trait core::any::Any">Any</a> for T<div class="where">where
T: 'static + ?<a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.type_id" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/any.rs.html#141">source</a><a href="#method.type_id" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/any/trait.Any.html#tymethod.type_id" class="fn">type_id</a>(&amp;self) -&gt; <a class="struct" href="https://doc.rust-lang.org/1.76.0/core/any/struct.TypeId.html" title="struct core::any::TypeId">TypeId</a></h4></section></summary><div class='docblock'>Gets the <code>TypeId</code> of <code>self</code>. <a href="https://doc.rust-lang.org/1.76.0/core/any/trait.Any.html#tymethod.type_id">Read more</a></div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-Borrow%3CT%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/borrow.rs.html#208">source</a><a href="#impl-Borrow%3CT%3E-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/borrow/trait.Borrow.html" title="trait core::borrow::Borrow">Borrow</a>&lt;T&gt; for T<div class="where">where
T: ?<a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.borrow" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/borrow.rs.html#210">source</a><a href="#method.borrow" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/borrow/trait.Borrow.html#tymethod.borrow" class="fn">borrow</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.reference.html">&amp;T</a></h4></section></summary><div class='docblock'>Immutably borrows from an owned value. <a href="https://doc.rust-lang.org/1.76.0/core/borrow/trait.Borrow.html#tymethod.borrow">Read more</a></div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-BorrowMut%3CT%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/borrow.rs.html#216">source</a><a href="#impl-BorrowMut%3CT%3E-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/borrow/trait.BorrowMut.html" title="trait core::borrow::BorrowMut">BorrowMut</a>&lt;T&gt; for T<div class="where">where
T: ?<a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.borrow_mut" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/borrow.rs.html#217">source</a><a href="#method.borrow_mut" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/borrow/trait.BorrowMut.html#tymethod.borrow_mut" class="fn">borrow_mut</a>(&amp;mut self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.reference.html">&amp;mut T</a></h4></section></summary><div class='docblock'>Mutably borrows from an owned value. <a href="https://doc.rust-lang.org/1.76.0/core/borrow/trait.BorrowMut.html#tymethod.borrow_mut">Read more</a></div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-From%3CT%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/convert/mod.rs.html#763">source</a><a href="#impl-From%3CT%3E-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.From.html" title="trait core::convert::From">From</a>&lt;T&gt; for T</h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.from" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/convert/mod.rs.html#766">source</a><a href="#method.from" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/convert/trait.From.html#tymethod.from" class="fn">from</a>(t: T) -&gt; T</h4></section></summary><div class="docblock"><p>Returns the argument unchanged.</p>
</div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-Instrument-for-T" class="impl"><a class="src rightside" href="../../src/tracing/instrument.rs.html#325">source</a><a href="#impl-Instrument-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="../../tracing/instrument/trait.Instrument.html" title="trait tracing::instrument::Instrument">Instrument</a> for T</h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.instrument" class="method trait-impl"><a class="src rightside" href="../../src/tracing/instrument.rs.html#86">source</a><a href="#method.instrument" class="anchor">§</a><h4 class="code-header">fn <a href="../../tracing/instrument/trait.Instrument.html#method.instrument" class="fn">instrument</a>(self, span: <a class="struct" href="../../tracing/span/struct.Span.html" title="struct tracing::span::Span">Span</a>) -&gt; <a class="struct" href="../../tracing/instrument/struct.Instrumented.html" title="struct tracing::instrument::Instrumented">Instrumented</a>&lt;Self&gt;</h4></section></summary><div class='docblock'>Instruments this type with the provided <a href="../../tracing/span/struct.Span.html" title="struct tracing::span::Span"><code>Span</code></a>, returning an
<code>Instrumented</code> wrapper. <a href="../../tracing/instrument/trait.Instrument.html#method.instrument">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.in_current_span" class="method trait-impl"><a class="src rightside" href="../../src/tracing/instrument.rs.html#128">source</a><a href="#method.in_current_span" class="anchor">§</a><h4 class="code-header">fn <a href="../../tracing/instrument/trait.Instrument.html#method.in_current_span" class="fn">in_current_span</a>(self) -&gt; <a class="struct" href="../../tracing/instrument/struct.Instrumented.html" title="struct tracing::instrument::Instrumented">Instrumented</a>&lt;Self&gt;</h4></section></summary><div class='docblock'>Instruments this type with the <a href="../../tracing/span/struct.Span.html#method.current" title="associated function tracing::span::Span::current">current</a> <a href="../../tracing/span/struct.Span.html" title="struct tracing::span::Span"><code>Span</code></a>, returning an
<code>Instrumented</code> wrapper. <a href="../../tracing/instrument/trait.Instrument.html#method.in_current_span">Read more</a></div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-Into%3CU%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/convert/mod.rs.html#747-749">source</a><a href="#impl-Into%3CU%3E-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T, U&gt; <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a>&lt;U&gt; for T<div class="where">where
U: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.From.html" title="trait core::convert::From">From</a>&lt;T&gt;,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.into" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/convert/mod.rs.html#756">source</a><a href="#method.into" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/convert/trait.Into.html#tymethod.into" class="fn">into</a>(self) -&gt; U</h4></section></summary><div class="docblock"><p>Calls <code>U::from(self)</code>.</p>
<p>That is, this conversion is whatever the implementation of
<code><a href="https://doc.rust-lang.org/1.76.0/core/convert/trait.From.html" title="trait core::convert::From">From</a>&lt;T&gt; for U</code> chooses to do.</p>
</div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-SubscriberExt-for-S" class="impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1898">source</a><a href="#impl-SubscriberExt-for-S" class="anchor">§</a><h3 class="code-header">impl&lt;S&gt; <a class="trait" href="../layer/trait.SubscriberExt.html" title="trait tracing_subscriber::layer::SubscriberExt">SubscriberExt</a> for S<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.with" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/layer/mod.rs.html#1501-1507">source</a><a href="#method.with" class="anchor">§</a><h4 class="code-header">fn <a href="../layer/trait.SubscriberExt.html#method.with" class="fn">with</a>&lt;L&gt;(self, layer: L) -&gt; <a class="struct" href="../layer/struct.Layered.html" title="struct tracing_subscriber::layer::Layered">Layered</a>&lt;L, Self&gt;<div class="where">where
L: <a class="trait" href="../layer/trait.Layer.html" title="trait tracing_subscriber::layer::Layer">Layer</a>&lt;Self&gt;,
Self: <a class="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><div class='docblock'>Wraps <code>self</code> with the provided <code>layer</code>.</div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-SubscriberInitExt-for-T" class="impl"><a class="src rightside" href="../../src/tracing_subscriber/util.rs.html#95">source</a><a href="#impl-SubscriberInitExt-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="../util/trait.SubscriberInitExt.html" title="trait tracing_subscriber::util::SubscriberInitExt">SubscriberInitExt</a> for T<div class="where">where
T: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a>&lt;<a class="struct" href="../../tracing_core/dispatcher/struct.Dispatch.html" title="struct tracing_core::dispatcher::Dispatch">Dispatch</a>&gt;,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.set_default" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/util.rs.html#38-43">source</a><a href="#method.set_default" class="anchor">§</a><h4 class="code-header">fn <a href="../util/trait.SubscriberInitExt.html#method.set_default" class="fn">set_default</a>(self) -&gt; <a class="struct" href="../../tracing_core/dispatcher/struct.DefaultGuard.html" title="struct tracing_core::dispatcher::DefaultGuard">DefaultGuard</a></h4></section></summary><div class='docblock'>Sets <code>self</code> as the <a href="https://docs.rs/tracing/0.1.21/tracing/dispatcher/index.html#setting-the-default-subscriber">default subscriber</a> in the current scope, returning a
guard that will unset it when dropped. <a href="../util/trait.SubscriberInitExt.html#method.set_default">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.try_init" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/util.rs.html#58-74">source</a><a href="#method.try_init" class="anchor">§</a><h4 class="code-header">fn <a href="../util/trait.SubscriberInitExt.html#method.try_init" class="fn">try_init</a>(self) -&gt; <a class="enum" href="https://doc.rust-lang.org/1.76.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.unit.html">()</a>, <a class="struct" href="../util/struct.TryInitError.html" title="struct tracing_subscriber::util::TryInitError">TryInitError</a>&gt;</h4></section></summary><div class='docblock'>Attempts to set <code>self</code> as the <a href="https://docs.rs/tracing/0.1.21/tracing/dispatcher/index.html#setting-the-default-subscriber">global default subscriber</a> in the current
scope, returning an error if one is already set. <a href="../util/trait.SubscriberInitExt.html#method.try_init">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.init" class="method trait-impl"><a class="src rightside" href="../../src/tracing_subscriber/util.rs.html#89-92">source</a><a href="#method.init" class="anchor">§</a><h4 class="code-header">fn <a href="../util/trait.SubscriberInitExt.html#method.init" class="fn">init</a>(self)</h4></section></summary><div class='docblock'>Attempts to set <code>self</code> as the <a href="https://docs.rs/tracing/0.1.21/tracing/dispatcher/index.html#setting-the-default-subscriber">global default subscriber</a> in the current
scope, panicking if this fails. <a href="../util/trait.SubscriberInitExt.html#method.init">Read more</a></div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-TryFrom%3CU%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/convert/mod.rs.html#803-805">source</a><a href="#impl-TryFrom%3CU%3E-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T, U&gt; <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a>&lt;U&gt; for T<div class="where">where
U: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a>&lt;T&gt;,</div></h3></section></summary><div class="impl-items"><details class="toggle" open><summary><section id="associatedtype.Error" class="associatedtype trait-impl"><a href="#associatedtype.Error" class="anchor">§</a><h4 class="code-header">type <a href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html#associatedtype.Error" class="associatedtype">Error</a> = <a class="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><div class='docblock'>The type returned in the event of a conversion error.</div></details><details class="toggle method-toggle" open><summary><section id="method.try_from" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/convert/mod.rs.html#810">source</a><a href="#method.try_from" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html#tymethod.try_from" class="fn">try_from</a>(value: U) -&gt; <a class="enum" href="https://doc.rust-lang.org/1.76.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;T, &lt;T as <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a>&lt;U&gt;&gt;::<a class="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>&gt;</h4></section></summary><div class='docblock'>Performs the conversion.</div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-TryInto%3CU%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/convert/mod.rs.html#788-790">source</a><a href="#impl-TryInto%3CU%3E-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T, U&gt; <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryInto.html" title="trait core::convert::TryInto">TryInto</a>&lt;U&gt; for T<div class="where">where
U: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a>&lt;T&gt;,</div></h3></section></summary><div class="impl-items"><details class="toggle" open><summary><section id="associatedtype.Error-1" class="associatedtype trait-impl"><a href="#associatedtype.Error-1" class="anchor">§</a><h4 class="code-header">type <a href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryInto.html#associatedtype.Error" class="associatedtype">Error</a> = &lt;U as <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a>&lt;T&gt;&gt;::<a class="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><div class='docblock'>The type returned in the event of a conversion error.</div></details><details class="toggle method-toggle" open><summary><section id="method.try_into" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/convert/mod.rs.html#795">source</a><a href="#method.try_into" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryInto.html#tymethod.try_into" class="fn">try_into</a>(self) -&gt; <a class="enum" href="https://doc.rust-lang.org/1.76.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;U, &lt;U as <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a>&lt;T&gt;&gt;::<a class="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>&gt;</h4></section></summary><div class='docblock'>Performs the conversion.</div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-WithSubscriber-for-T" class="impl"><a class="src rightside" href="../../src/tracing/instrument.rs.html#393">source</a><a href="#impl-WithSubscriber-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="../../tracing/instrument/trait.WithSubscriber.html" title="trait tracing::instrument::WithSubscriber">WithSubscriber</a> for T</h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.with_subscriber" class="method trait-impl"><a class="src rightside" href="../../src/tracing/instrument.rs.html#176-178">source</a><a href="#method.with_subscriber" class="anchor">§</a><h4 class="code-header">fn <a href="../../tracing/instrument/trait.WithSubscriber.html#method.with_subscriber" class="fn">with_subscriber</a>&lt;S&gt;(self, subscriber: S) -&gt; <a class="struct" href="../../tracing/instrument/struct.WithDispatch.html" title="struct tracing::instrument::WithDispatch">WithDispatch</a>&lt;Self&gt;<div class="where">where
S: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a>&lt;<a class="struct" href="../../tracing_core/dispatcher/struct.Dispatch.html" title="struct tracing_core::dispatcher::Dispatch">Dispatch</a>&gt;,</div></h4></section></summary><div class='docblock'>Attaches the provided <a href="../../tracing_core/subscriber/trait.Subscriber.html" title="trait tracing_core::subscriber::Subscriber"><code>Subscriber</code></a> to this type, returning a
<a href="../../tracing/instrument/struct.WithDispatch.html" title="struct tracing::instrument::WithDispatch"><code>WithDispatch</code></a> wrapper. <a href="../../tracing/instrument/trait.WithSubscriber.html#method.with_subscriber">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.with_current_subscriber" class="method trait-impl"><a class="src rightside" href="../../src/tracing/instrument.rs.html#228">source</a><a href="#method.with_current_subscriber" class="anchor">§</a><h4 class="code-header">fn <a href="../../tracing/instrument/trait.WithSubscriber.html#method.with_current_subscriber" class="fn">with_current_subscriber</a>(self) -&gt; <a class="struct" href="../../tracing/instrument/struct.WithDispatch.html" title="struct tracing::instrument::WithDispatch">WithDispatch</a>&lt;Self&gt;</h4></section></summary><div class='docblock'>Attaches the current <a href="../../tracing/dispatcher/index.html#setting-the-default-subscriber" title="mod tracing::dispatcher">default</a> <a href="../../tracing_core/subscriber/trait.Subscriber.html" title="trait tracing_core::subscriber::Subscriber"><code>Subscriber</code></a> to this type, returning a
<a href="../../tracing/instrument/struct.WithDispatch.html" title="struct tracing::instrument::WithDispatch"><code>WithDispatch</code></a> wrapper. <a href="../../tracing/instrument/trait.WithSubscriber.html#method.with_current_subscriber">Read more</a></div></details></div></details></div></section></div></main></body></html>