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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="Attributes provided to a `Subscriber` describing a new span when it is created."><title>Attributes in tracing::span - Rust</title><script> if (window.location.protocol !== "file:") document.write(`<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 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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" title="show sidebar"></button><a class="logo-container" href="../../tracing/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/index.html"><img src="https://raw.githubusercontent.com/tokio-rs/tracing/master/assets/logo-type.png" alt="logo"></a><h2><a href="../../tracing/index.html">tracing</a><span class="version">0.1.40</span></h2></div><h2 class="location"><a href="#">Attributes</a></h2><div class="sidebar-elems"><section><h3><a href="#implementations">Methods</a></h3><ul class="block method"><li><a href="#method.child_of">child_of</a></li><li><a href="#method.contains">contains</a></li><li><a href="#method.fields">fields</a></li><li><a href="#method.is_contextual">is_contextual</a></li><li><a href="#method.is_empty">is_empty</a></li><li><a href="#method.is_root">is_root</a></li><li><a href="#method.metadata">metadata</a></li><li><a href="#method.new">new</a></li><li><a href="#method.new_root">new_root</a></li><li><a href="#method.parent">parent</a></li><li><a href="#method.record">record</a></li><li><a href="#method.values">values</a></li></ul><h3><a href="#trait-implementations">Trait Implementations</a></h3><ul class="block trait-implementation"><li><a href="#impl-Debug-for-Attributes%3C'a%3E">Debug</a></li></ul><h3><a href="#synthetic-implementations">Auto Trait Implementations</a></h3><ul class="block synthetic-implementation"><li><a href="#impl-RefUnwindSafe-for-Attributes%3C'a%3E">!RefUnwindSafe</a></li><li><a href="#impl-Send-for-Attributes%3C'a%3E">!Send</a></li><li><a href="#impl-Sync-for-Attributes%3C'a%3E">!Sync</a></li><li><a href="#impl-UnwindSafe-for-Attributes%3C'a%3E">!UnwindSafe</a></li><li><a href="#impl-Freeze-for-Attributes%3C'a%3E">Freeze</a></li><li><a href="#impl-Unpin-for-Attributes%3C'a%3E">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 href="#impl-Into%3CU%3E-for-T">Into&lt;U&gt;</a></li><li><a href="#impl-TryFrom%3CU%3E-for-T">TryFrom&lt;U&gt;</a></li><li><a href="#impl-TryInto%3CU%3E-for-T">TryInto&lt;U&gt;</a></li><li><a href="#impl-WithSubscriber-for-T">WithSubscriber</a></li></ul></section><h2><a href="index.html">In tracing::span</a></h2></div></nav><div class="sidebar-resizer"></div>
<main><div class="width-limiter"><nav class="sub"><form class="search-form"><span></span><div id="sidebar-button" tabindex="-1"><a href="../../tracing/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</a>::<wbr><a href="index.html">span</a>::<wbr><a class="struct" href="#">Attributes</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_core/span.rs.html#21">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 Attributes&lt;'a&gt; { <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>Attributes provided to a <code>Subscriber</code> describing a new span when it is
created.</p>
</div></details><h2 id="implementations" class="section-header">Implementations<a href="#implementations" class="anchor">§</a></h2><div id="implementations-list"><details class="toggle implementors-toggle" open><summary><section id="impl-Attributes%3C'a%3E" class="impl"><a class="src rightside" href="../../src/tracing_core/span.rs.html#105">source</a><a href="#impl-Attributes%3C'a%3E" class="anchor">§</a><h3 class="code-header">impl&lt;'a&gt; <a class="struct" href="struct.Attributes.html" title="struct tracing::span::Attributes">Attributes</a>&lt;'a&gt;</h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.new" class="method"><a class="src rightside" href="../../src/tracing_core/span.rs.html#108">source</a><h4 class="code-header">pub fn <a href="#method.new" class="fn">new</a>(
metadata: &amp;'static <a class="struct" href="../struct.Metadata.html" title="struct tracing::Metadata">Metadata</a>&lt;'static&gt;,
values: &amp;'a <a class="struct" href="../field/struct.ValueSet.html" title="struct tracing::field::ValueSet">ValueSet</a>&lt;'a&gt;
) -&gt; <a class="struct" href="struct.Attributes.html" title="struct tracing::span::Attributes">Attributes</a>&lt;'a&gt;</h4></section></summary><div class="docblock"><p>Returns <code>Attributes</code> describing a new child span of the current span,
with the provided metadata and values.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.new_root" class="method"><a class="src rightside" href="../../src/tracing_core/span.rs.html#118">source</a><h4 class="code-header">pub fn <a href="#method.new_root" class="fn">new_root</a>(
metadata: &amp;'static <a class="struct" href="../struct.Metadata.html" title="struct tracing::Metadata">Metadata</a>&lt;'static&gt;,
values: &amp;'a <a class="struct" href="../field/struct.ValueSet.html" title="struct tracing::field::ValueSet">ValueSet</a>&lt;'a&gt;
) -&gt; <a class="struct" href="struct.Attributes.html" title="struct tracing::span::Attributes">Attributes</a>&lt;'a&gt;</h4></section></summary><div class="docblock"><p>Returns <code>Attributes</code> describing a new span at the root of its own trace
tree, with the provided metadata and values.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.child_of" class="method"><a class="src rightside" href="../../src/tracing_core/span.rs.html#128-132">source</a><h4 class="code-header">pub fn <a href="#method.child_of" class="fn">child_of</a>(
parent: <a class="struct" href="struct.Id.html" title="struct tracing::span::Id">Id</a>,
metadata: &amp;'static <a class="struct" href="../struct.Metadata.html" title="struct tracing::Metadata">Metadata</a>&lt;'static&gt;,
values: &amp;'a <a class="struct" href="../field/struct.ValueSet.html" title="struct tracing::field::ValueSet">ValueSet</a>&lt;'a&gt;
) -&gt; <a class="struct" href="struct.Attributes.html" title="struct tracing::span::Attributes">Attributes</a>&lt;'a&gt;</h4></section></summary><div class="docblock"><p>Returns <code>Attributes</code> describing a new child span of the specified
parent span, with the provided metadata and values.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.metadata" class="method"><a class="src rightside" href="../../src/tracing_core/span.rs.html#141">source</a><h4 class="code-header">pub fn <a href="#method.metadata" class="fn">metadata</a>(&amp;self) -&gt; &amp;'static <a class="struct" href="../struct.Metadata.html" title="struct tracing::Metadata">Metadata</a>&lt;'static&gt;</h4></section></summary><div class="docblock"><p>Returns a reference to the new spans metadata.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.values" class="method"><a class="src rightside" href="../../src/tracing_core/span.rs.html#147">source</a><h4 class="code-header">pub fn <a href="#method.values" class="fn">values</a>(&amp;self) -&gt; &amp;<a class="struct" href="../field/struct.ValueSet.html" title="struct tracing::field::ValueSet">ValueSet</a>&lt;'a&gt;</h4></section></summary><div class="docblock"><p>Returns a reference to a <code>ValueSet</code> containing any values the new span
was created with.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.is_root" class="method"><a class="src rightside" href="../../src/tracing_core/span.rs.html#152">source</a><h4 class="code-header">pub fn <a href="#method.is_root" class="fn">is_root</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.78.0/std/primitive.bool.html">bool</a></h4></section></summary><div class="docblock"><p>Returns true if the new span should be a root.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.is_contextual" class="method"><a class="src rightside" href="../../src/tracing_core/span.rs.html#163">source</a><h4 class="code-header">pub fn <a href="#method.is_contextual" class="fn">is_contextual</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.78.0/std/primitive.bool.html">bool</a></h4></section></summary><div class="docblock"><p>Returns true if the new spans parent should be determined based on the
current context.</p>
<p>If this is true and the current thread is currently inside a span, then
that span should be the new spans parent. Otherwise, if the current
thread is <em>not</em> inside a span, then the new span will be the root of its
own trace tree.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.parent" class="method"><a class="src rightside" href="../../src/tracing_core/span.rs.html#171">source</a><h4 class="code-header">pub fn <a href="#method.parent" class="fn">parent</a>(&amp;self) -&gt; <a class="enum" href="https://doc.rust-lang.org/1.78.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a>&lt;&amp;<a class="struct" href="struct.Id.html" title="struct tracing::span::Id">Id</a>&gt;</h4></section></summary><div class="docblock"><p>Returns the new spans explicitly-specified parent, if there is one.</p>
<p>Otherwise (if the new span is a root or is a child of the current span),
returns <code>None</code>.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.record" class="method"><a class="src rightside" href="../../src/tracing_core/span.rs.html#182">source</a><h4 class="code-header">pub fn <a href="#method.record" class="fn">record</a>(&amp;self, visitor: &amp;mut dyn <a class="trait" href="../field/trait.Visit.html" title="trait tracing::field::Visit">Visit</a>)</h4></section></summary><div class="docblock"><p>Records all the fields in this set of <code>Attributes</code> with the provided
<a href="../field/trait.Visit.html" title="trait tracing::field::Visit">Visitor</a>.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.contains" class="method"><a class="src rightside" href="../../src/tracing_core/span.rs.html#188">source</a><h4 class="code-header">pub fn <a href="#method.contains" class="fn">contains</a>(&amp;self, field: &amp;<a class="struct" href="../field/struct.Field.html" title="struct tracing::field::Field">Field</a>) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.78.0/std/primitive.bool.html">bool</a></h4></section></summary><div class="docblock"><p>Returns <code>true</code> if this set of <code>Attributes</code> contains a value for the
given <code>Field</code>.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.is_empty" class="method"><a class="src rightside" href="../../src/tracing_core/span.rs.html#193">source</a><h4 class="code-header">pub fn <a href="#method.is_empty" class="fn">is_empty</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.78.0/std/primitive.bool.html">bool</a></h4></section></summary><div class="docblock"><p>Returns true if this set of <code>Attributes</code> contains <em>no</em> values.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.fields" class="method"><a class="src rightside" href="../../src/tracing_core/span.rs.html#208">source</a><h4 class="code-header">pub fn <a href="#method.fields" class="fn">fields</a>(&amp;self) -&gt; &amp;<a class="struct" href="../field/struct.FieldSet.html" title="struct tracing::field::FieldSet">FieldSet</a></h4></section></summary><div class="docblock"><p>Returns the set of all <a href="../../tracing_core/field/index.html" title="mod tracing_core::field">fields</a> defined by this spans <a href="../struct.Metadata.html" title="struct tracing::Metadata"><code>Metadata</code></a>.</p>
<p>Note that the <a href="../field/struct.FieldSet.html" title="struct tracing::field::FieldSet"><code>FieldSet</code></a> returned by this method includes <em>all</em> the
fields declared by this span, not just those with values that are recorded
as part of this set of <code>Attributes</code>. Other fields with values not present in
this <code>Attributes</code> value set may <a href="struct.Attributes.html#method.record" title="method tracing::span::Attributes::record">record</a> values later.</p>
</div></details></div></details></div><h2 id="trait-implementations" class="section-header">Trait Implementations<a href="#trait-implementations" class="anchor">§</a></h2><div id="trait-implementations-list"><details class="toggle implementors-toggle" open><summary><section id="impl-Debug-for-Attributes%3C'a%3E" class="impl"><a class="src rightside" href="../../src/tracing_core/span.rs.html#20">source</a><a href="#impl-Debug-for-Attributes%3C'a%3E" class="anchor">§</a><h3 class="code-header">impl&lt;'a&gt; <a class="trait" href="https://doc.rust-lang.org/1.78.0/core/fmt/trait.Debug.html" title="trait core::fmt::Debug">Debug</a> for <a class="struct" href="struct.Attributes.html" title="struct tracing::span::Attributes">Attributes</a>&lt;'a&gt;</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_core/span.rs.html#20">source</a><a href="#method.fmt" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.78.0/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/1.78.0/core/fmt/struct.Formatter.html" title="struct core::fmt::Formatter">Formatter</a>&lt;'_&gt;) -&gt; <a class="enum" href="https://doc.rust-lang.org/1.78.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.78.0/std/primitive.unit.html">()</a>, <a class="struct" href="https://doc.rust-lang.org/1.78.0/core/fmt/struct.Error.html" title="struct core::fmt::Error">Error</a>&gt;</h4></section></summary><div class='docblock'>Formats the value using the given formatter. <a href="https://doc.rust-lang.org/1.78.0/core/fmt/trait.Debug.html#tymethod.fmt">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-Freeze-for-Attributes%3C'a%3E" class="impl"><a href="#impl-Freeze-for-Attributes%3C'a%3E" class="anchor">§</a><h3 class="code-header">impl&lt;'a&gt; <a class="trait" href="https://doc.rust-lang.org/1.78.0/core/marker/trait.Freeze.html" title="trait core::marker::Freeze">Freeze</a> for <a class="struct" href="struct.Attributes.html" title="struct tracing::span::Attributes">Attributes</a>&lt;'a&gt;</h3></section><section id="impl-RefUnwindSafe-for-Attributes%3C'a%3E" class="impl"><a href="#impl-RefUnwindSafe-for-Attributes%3C'a%3E" class="anchor">§</a><h3 class="code-header">impl&lt;'a&gt; !<a class="trait" href="https://doc.rust-lang.org/1.78.0/core/panic/unwind_safe/trait.RefUnwindSafe.html" title="trait core::panic::unwind_safe::RefUnwindSafe">RefUnwindSafe</a> for <a class="struct" href="struct.Attributes.html" title="struct tracing::span::Attributes">Attributes</a>&lt;'a&gt;</h3></section><section id="impl-Send-for-Attributes%3C'a%3E" class="impl"><a href="#impl-Send-for-Attributes%3C'a%3E" class="anchor">§</a><h3 class="code-header">impl&lt;'a&gt; !<a class="trait" href="https://doc.rust-lang.org/1.78.0/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> for <a class="struct" href="struct.Attributes.html" title="struct tracing::span::Attributes">Attributes</a>&lt;'a&gt;</h3></section><section id="impl-Sync-for-Attributes%3C'a%3E" class="impl"><a href="#impl-Sync-for-Attributes%3C'a%3E" class="anchor">§</a><h3 class="code-header">impl&lt;'a&gt; !<a class="trait" href="https://doc.rust-lang.org/1.78.0/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a> for <a class="struct" href="struct.Attributes.html" title="struct tracing::span::Attributes">Attributes</a>&lt;'a&gt;</h3></section><section id="impl-Unpin-for-Attributes%3C'a%3E" class="impl"><a href="#impl-Unpin-for-Attributes%3C'a%3E" class="anchor">§</a><h3 class="code-header">impl&lt;'a&gt; <a class="trait" href="https://doc.rust-lang.org/1.78.0/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a> for <a class="struct" href="struct.Attributes.html" title="struct tracing::span::Attributes">Attributes</a>&lt;'a&gt;</h3></section><section id="impl-UnwindSafe-for-Attributes%3C'a%3E" class="impl"><a href="#impl-UnwindSafe-for-Attributes%3C'a%3E" class="anchor">§</a><h3 class="code-header">impl&lt;'a&gt; !<a class="trait" href="https://doc.rust-lang.org/1.78.0/core/panic/unwind_safe/trait.UnwindSafe.html" title="trait core::panic::unwind_safe::UnwindSafe">UnwindSafe</a> for <a class="struct" href="struct.Attributes.html" title="struct tracing::span::Attributes">Attributes</a>&lt;'a&gt;</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/1.78.0/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/1.78.0/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/1.78.0/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/1.78.0/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/1.78.0/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/1.78.0/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/1.78.0/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/1.78.0/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/1.78.0/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/1.78.0/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/1.78.0/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/1.78.0/core/borrow/trait.Borrow.html#tymethod.borrow" class="fn">borrow</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.78.0/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/1.78.0/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/1.78.0/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/1.78.0/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/1.78.0/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/1.78.0/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/1.78.0/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/1.78.0/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/1.78.0/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/1.78.0/src/core/convert/mod.rs.html#765">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/1.78.0/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/1.78.0/src/core/convert/mod.rs.html#768">source</a><a href="#method.from" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.78.0/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="../trait.Instrument.html" title="trait tracing::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#86-91">source</a><a href="#method.instrument" class="anchor">§</a><h4 class="code-header">fn <a href="../trait.Instrument.html#method.instrument" class="fn">instrument</a>(self, span: <a class="struct" href="../struct.Span.html" title="struct tracing::Span">Span</a>) -&gt; <a class="struct" href="../instrument/struct.Instrumented.html" title="struct tracing::instrument::Instrumented">Instrumented</a>&lt;Self&gt; <a href="#" class="tooltip" data-notable-ty="Instrumented&lt;Self&gt;"></a></h4></section></summary><div class='docblock'>Instruments this type with the provided <a href="../struct.Span.html" title="struct tracing::Span"><code>Span</code></a>, returning an
<code>Instrumented</code> wrapper. <a href="../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#128-130">source</a><a href="#method.in_current_span" class="anchor">§</a><h4 class="code-header">fn <a href="../trait.Instrument.html#method.in_current_span" class="fn">in_current_span</a>(self) -&gt; <a class="struct" href="../instrument/struct.Instrumented.html" title="struct tracing::instrument::Instrumented">Instrumented</a>&lt;Self&gt; <a href="#" class="tooltip" data-notable-ty="Instrumented&lt;Self&gt;"></a></h4></section></summary><div class='docblock'>Instruments this type with the <a href="../struct.Span.html#method.current" title="associated function tracing::Span::current">current</a> <a href="../struct.Span.html" title="struct tracing::Span"><code>Span</code></a>, returning an
<code>Instrumented</code> wrapper. <a href="../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/1.78.0/src/core/convert/mod.rs.html#748-750">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/1.78.0/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/1.78.0/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/1.78.0/src/core/convert/mod.rs.html#758">source</a><a href="#method.into" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.78.0/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/1.78.0/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-TryFrom%3CU%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.78.0/src/core/convert/mod.rs.html#805-807">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/1.78.0/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/1.78.0/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-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/1.78.0/core/convert/trait.TryFrom.html#associatedtype.Error" class="associatedtype">Error</a> = <a class="enum" href="https://doc.rust-lang.org/1.78.0/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/1.78.0/src/core/convert/mod.rs.html#812">source</a><a href="#method.try_from" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.78.0/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/1.78.0/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/1.78.0/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/1.78.0/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/1.78.0/src/core/convert/mod.rs.html#790-792">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/1.78.0/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/1.78.0/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" class="associatedtype trait-impl"><a href="#associatedtype.Error" class="anchor">§</a><h4 class="code-header">type <a href="https://doc.rust-lang.org/1.78.0/core/convert/trait.TryInto.html#associatedtype.Error" class="associatedtype">Error</a> = &lt;U as <a class="trait" href="https://doc.rust-lang.org/1.78.0/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/1.78.0/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/1.78.0/src/core/convert/mod.rs.html#797">source</a><a href="#method.try_into" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.78.0/core/convert/trait.TryInto.html#tymethod.try_into" class="fn">try_into</a>(self) -&gt; <a class="enum" href="https://doc.rust-lang.org/1.78.0/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/1.78.0/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/1.78.0/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="../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#176-184">source</a><a href="#method.with_subscriber" class="anchor">§</a><h4 class="code-header">fn <a href="../instrument/trait.WithSubscriber.html#method.with_subscriber" class="fn">with_subscriber</a>&lt;S&gt;(self, subscriber: S) -&gt; <a class="struct" href="../instrument/struct.WithDispatch.html" title="struct tracing::instrument::WithDispatch">WithDispatch</a>&lt;Self&gt; <a href="#" class="tooltip" data-notable-ty="WithDispatch&lt;Self&gt;"></a><div class="where">where
S: <a class="trait" href="https://doc.rust-lang.org/1.78.0/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a>&lt;<a class="struct" href="../struct.Dispatch.html" title="struct tracing::Dispatch">Dispatch</a>&gt;,</div></h4></section></summary><div class='docblock'>Attaches the provided <a href="../trait.Subscriber.html" title="trait tracing::Subscriber"><code>Subscriber</code></a> to this type, returning a
<a href="../instrument/struct.WithDispatch.html" title="struct tracing::instrument::WithDispatch"><code>WithDispatch</code></a> wrapper. <a href="../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#228-233">source</a><a href="#method.with_current_subscriber" class="anchor">§</a><h4 class="code-header">fn <a href="../instrument/trait.WithSubscriber.html#method.with_current_subscriber" class="fn">with_current_subscriber</a>(self) -&gt; <a class="struct" href="../instrument/struct.WithDispatch.html" title="struct tracing::instrument::WithDispatch">WithDispatch</a>&lt;Self&gt; <a href="#" class="tooltip" data-notable-ty="WithDispatch&lt;Self&gt;"></a></h4></section></summary><div class='docblock'>Attaches the current <a href="../dispatcher/index.html#setting-the-default-subscriber" title="mod tracing::dispatcher">default</a> <a href="../trait.Subscriber.html" title="trait tracing::Subscriber"><code>Subscriber</code></a> to this type, returning a
<a href="../instrument/struct.WithDispatch.html" title="struct tracing::instrument::WithDispatch"><code>WithDispatch</code></a> wrapper. <a href="../instrument/trait.WithSubscriber.html#method.with_current_subscriber">Read more</a></div></details></div></details></div><script type="text/json" id="notable-traits-data">{"Instrumented<Self>":"<h3>Notable traits for <code><a class=\"struct\" href=\"../instrument/struct.Instrumented.html\" title=\"struct tracing::instrument::Instrumented\">Instrumented</a>&lt;T&gt;</code></h3><pre><code><div class=\"where\">impl&lt;T: <a class=\"trait\" href=\"https://doc.rust-lang.org/1.78.0/core/future/future/trait.Future.html\" title=\"trait core::future::future::Future\">Future</a>&gt; <a class=\"trait\" href=\"https://doc.rust-lang.org/1.78.0/core/future/future/trait.Future.html\" title=\"trait core::future::future::Future\">Future</a> for <a class=\"struct\" href=\"../instrument/struct.Instrumented.html\" title=\"struct tracing::instrument::Instrumented\">Instrumented</a>&lt;T&gt;</div><div class=\"where\"> type <a href=\"https://doc.rust-lang.org/1.78.0/core/future/future/trait.Future.html#associatedtype.Output\" class=\"associatedtype\">Output</a> = T::<a class=\"associatedtype\" href=\"https://doc.rust-lang.org/1.78.0/core/future/future/trait.Future.html#associatedtype.Output\" title=\"type core::future::future::Future::Output\">Output</a>;</div>","WithDispatch<Self>":"<h3>Notable traits for <code><a class=\"struct\" href=\"../instrument/struct.WithDispatch.html\" title=\"struct tracing::instrument::WithDispatch\">WithDispatch</a>&lt;T&gt;</code></h3><pre><code><div class=\"where\">impl&lt;T: <a class=\"trait\" href=\"https://doc.rust-lang.org/1.78.0/core/future/future/trait.Future.html\" title=\"trait core::future::future::Future\">Future</a>&gt; <a class=\"trait\" href=\"https://doc.rust-lang.org/1.78.0/core/future/future/trait.Future.html\" title=\"trait core::future::future::Future\">Future</a> for <a class=\"struct\" href=\"../instrument/struct.WithDispatch.html\" title=\"struct tracing::instrument::WithDispatch\">WithDispatch</a>&lt;T&gt;</div><div class=\"where\"> type <a href=\"https://doc.rust-lang.org/1.78.0/core/future/future/trait.Future.html#associatedtype.Output\" class=\"associatedtype\">Output</a> = T::<a class=\"associatedtype\" href=\"https://doc.rust-lang.org/1.78.0/core/future/future/trait.Future.html#associatedtype.Output\" title=\"type core::future::future::Future::Output\">Output</a>;</div>"}</script></section></div></main></body></html>