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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="API documentation for the Rust `Dispatch` struct in crate `tracing`."><meta name="keywords" content="rust, rustlang, rust-lang, Dispatch"><title>tracing::Dispatch - Rust</title><link rel="stylesheet" type="text/css" href="../normalize.css"><link rel="stylesheet" type="text/css" href="../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../light.css" id="themeStyle"><link rel="stylesheet" type="text/css" href="../dark.css" disabled ><link rel="stylesheet" type="text/css" href="../ayu.css" disabled ><script id="default-settings"></script><script src="../storage.js"></script><noscript><link rel="stylesheet" href="../noscript.css"></noscript><link rel="icon" type="image/svg+xml" href="../favicon.svg">
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<link rel="alternate icon" type="image/png" href="../favicon-32x32.png"><style type="text/css">#crate-search{background-image:url("../down-arrow.svg");}</style></head><body class="rustdoc struct"><!--[if lte IE 8]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu">☰</div><a href='../tracing/index.html'><div class='logo-container'><img src='https://raw.githubusercontent.com/tokio-rs/tracing/master/assets/logo-type.png' alt='logo'></div></a><p class="location">Struct Dispatch</p><div class="sidebar-elems"><div class="block items"><a class="sidebar-title" href="#implementations">Methods</a><div class="sidebar-links"><a href="#method.clone_span">clone_span</a><a href="#method.current_span">current_span</a><a href="#method.downcast_ref">downcast_ref</a><a href="#method.drop_span">drop_span</a><a href="#method.enabled">enabled</a><a href="#method.enter">enter</a><a href="#method.event">event</a><a href="#method.exit">exit</a><a href="#method.is">is</a><a href="#method.new">new</a><a href="#method.new_span">new_span</a><a href="#method.none">none</a><a href="#method.record">record</a><a href="#method.record_follows_from">record_follows_from</a><a href="#method.register_callsite">register_callsite</a><a href="#method.try_close">try_close</a></div><a class="sidebar-title" href="#trait-implementations">Trait Implementations</a><div class="sidebar-links"><a href="#impl-Clone">Clone</a><a href="#impl-Debug">Debug</a><a href="#impl-Default">Default</a><a href="#impl-From%3CS%3E">From<S></a></div><a class="sidebar-title" href="#synthetic-implementations">Auto Trait Implementations</a><div class="sidebar-links"><a href="#impl-RefUnwindSafe">!RefUnwindSafe</a><a href="#impl-Send">Send</a><a href="#impl-Sync">Sync</a><a href="#impl-Unpin">Unpin</a><a href="#impl-UnwindSafe">!UnwindSafe</a></div><a class="sidebar-title" href="#blanket-implementations">Blanket Implementations</a><div class="sidebar-links"><a href="#impl-Any">Any</a><a href="#impl-Borrow%3CT%3E">Borrow<T></a><a href="#impl-BorrowMut%3CT%3E">BorrowMut<T></a><a href="#impl-From%3CT%3E">From<T></a><a href="#impl-Instrument">Instrument</a><a href="#impl-Into%3CU%3E">Into<U></a><a href="#impl-ToOwned">ToOwned</a><a href="#impl-TryFrom%3CU%3E">TryFrom<U></a><a href="#impl-TryInto%3CU%3E">TryInto<U></a></div></div><p class="location"><a href="index.html">tracing</a></p><div id="sidebar-vars" data-name="Dispatch" data-ty="struct" data-relpath=""></div><script defer src="sidebar-items.js"></script></div></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!" aria-haspopup="menu"><img src="../brush.svg" width="18" alt="Pick another theme!"></button><div id="theme-choices" role="menu"></div></div><script src="../theme.js"></script><nav class="sub"><form class="search-form"><div class="search-container"><div><select id="crate-search"><option value="All crates">All crates</option></select><input class="search-input" name="search" disabled autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"></div><button type="button" class="help-button">?</button>
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<a id="settings-menu" href="../settings.html"><img src="../wheel.svg" width="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><h1 class="fqn"><span class="in-band">Struct <a href="index.html">tracing</a>::<wbr><a class="struct" href="">Dispatch</a></span><span class="out-of-band"><span id="render-detail"><a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class="inner">−</span>]</a></span><a class="srclink" href="../src/tracing_core/dispatcher.rs.html#160-162" title="goto source code">[src]</a></span></h1><div class="docblock type-decl hidden-by-usual-hider"><pre class="rust struct">pub struct Dispatch { /* fields omitted */ }</pre></div><div class="docblock"><p><code>Dispatch</code> trace data to a <a href="trait.Subscriber.html"><code>Subscriber</code></a>.</p>
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</div><h2 id="implementations" class="small-section-header">Implementations<a href="#implementations" class="anchor"></a></h2><h3 id="impl" class="impl"><code class="in-band">impl <a class="struct" href="../tracing/struct.Dispatch.html" title="struct tracing::Dispatch">Dispatch</a></code><a href="#impl" class="anchor"></a><a class="srclink" href="../src/tracing_core/dispatcher.rs.html#404-644" title="goto source code">[src]</a></h3><div class="impl-items"><h4 id="method.none" class="method"><code>pub fn <a href="#method.none" class="fnname">none</a>() -> <a class="struct" href="../tracing/struct.Dispatch.html" title="struct tracing::Dispatch">Dispatch</a></code><a class="srclink" href="../src/tracing_core/dispatcher.rs.html#407" title="goto source code">[src]</a></h4><div class="docblock"><p>Returns a new <code>Dispatch</code> that discards events and spans.</p>
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</div><h4 id="method.new" class="method"><code>pub fn <a href="#method.new" class="fnname">new</a><S>(subscriber: S) -> <a class="struct" href="../tracing/struct.Dispatch.html" title="struct tracing::Dispatch">Dispatch</a> <span class="where fmt-newline">where<br> S: <a class="trait" href="../tracing/trait.Subscriber.html" title="trait tracing::Subscriber">Subscriber</a> + <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> + <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a> + 'static, </span></code><a class="srclink" href="../src/tracing_core/dispatcher.rs.html#416-418" title="goto source code">[src]</a></h4><div class="docblock"><p>Returns a <code>Dispatch</code> that forwards to the given <a href="../subscriber/trait.Subscriber.html"><code>Subscriber</code></a>.</p>
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</div><h4 id="method.register_callsite" class="method"><code>pub fn <a href="#method.register_callsite" class="fnname">register_callsite</a>(<br> &self, <br> metadata: &'static <a class="struct" href="../tracing/struct.Metadata.html" title="struct tracing::Metadata">Metadata</a><'static><br>) -> <a class="struct" href="../tracing/subscriber/struct.Interest.html" title="struct tracing::subscriber::Interest">Interest</a></code><a class="srclink" href="../src/tracing_core/dispatcher.rs.html#440" title="goto source code">[src]</a></h4><div class="docblock"><p>Registers a new callsite with this subscriber, returning whether or not
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the subscriber is interested in being notified about the callsite.</p>
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<p>This calls the <a href="../subscriber/trait.Subscriber.html#method.register_callsite"><code>register_callsite</code></a> function on the <a href="../subscriber/trait.Subscriber.html"><code>Subscriber</code></a>
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that this <code>Dispatch</code> forwards to.</p>
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</div><h4 id="method.new_span" class="method"><code>pub fn <a href="#method.new_span" class="fnname">new_span</a>(&self, span: &<a class="struct" href="../tracing/span/struct.Attributes.html" title="struct tracing::span::Attributes">Attributes</a><'_>) -> <a class="struct" href="../tracing/span/struct.Id.html" title="struct tracing::span::Id">Id</a></code><a class="srclink" href="../src/tracing_core/dispatcher.rs.html#470" title="goto source code">[src]</a></h4><div class="docblock"><p>Record the construction of a new span, returning a new <a href="../span/struct.Id.html">ID</a> for the
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span being constructed.</p>
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<p>This calls the <a href="../subscriber/trait.Subscriber.html#method.new_span"><code>new_span</code></a> function on the <a href="../subscriber/trait.Subscriber.html"><code>Subscriber</code></a> that this
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<code>Dispatch</code> forwards to.</p>
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</div><h4 id="method.record" class="method"><code>pub fn <a href="#method.record" class="fnname">record</a>(&self, span: &<a class="struct" href="../tracing/span/struct.Id.html" title="struct tracing::span::Id">Id</a>, values: &<a class="struct" href="../tracing/span/struct.Record.html" title="struct tracing::span::Record">Record</a><'_>)</code><a class="srclink" href="../src/tracing_core/dispatcher.rs.html#482" title="goto source code">[src]</a></h4><div class="docblock"><p>Record a set of values on a span.</p>
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<p>This calls the <a href="../subscriber/trait.Subscriber.html#method.record"><code>record</code></a> function on the <a href="../subscriber/trait.Subscriber.html"><code>Subscriber</code></a> that this
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<code>Dispatch</code> forwards to.</p>
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</div><h4 id="method.record_follows_from" class="method"><code>pub fn <a href="#method.record_follows_from" class="fnname">record_follows_from</a>(&self, span: &<a class="struct" href="../tracing/span/struct.Id.html" title="struct tracing::span::Id">Id</a>, follows: &<a class="struct" href="../tracing/span/struct.Id.html" title="struct tracing::span::Id">Id</a>)</code><a class="srclink" href="../src/tracing_core/dispatcher.rs.html#495" title="goto source code">[src]</a></h4><div class="docblock"><p>Adds an indication that <code>span</code> follows from the span with the id
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<code>follows</code>.</p>
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<p>This calls the <a href="../subscriber/trait.Subscriber.html#method.record_follows_from"><code>record_follows_from</code></a> function on the <a href="../subscriber/trait.Subscriber.html"><code>Subscriber</code></a>
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that this <code>Dispatch</code> forwards to.</p>
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</div><h4 id="method.enabled" class="method"><code>pub fn <a href="#method.enabled" class="fnname">enabled</a>(&self, metadata: &<a class="struct" href="../tracing/struct.Metadata.html" title="struct tracing::Metadata">Metadata</a><'_>) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a></code><a class="srclink" href="../src/tracing_core/dispatcher.rs.html#509" title="goto source code">[src]</a></h4><div class="docblock"><p>Returns true if a span with the specified <a href="../metadata/struct.Metadata.html">metadata</a> would be
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recorded.</p>
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<p>This calls the <a href="../subscriber/trait.Subscriber.html#method.enabled"><code>enabled</code></a> function on the <a href="../subscriber/trait.Subscriber.html"><code>Subscriber</code></a> that this
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<code>Dispatch</code> forwards to.</p>
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</div><h4 id="method.event" class="method"><code>pub fn <a href="#method.event" class="fnname">event</a>(&self, event: &<a class="struct" href="../tracing/event/struct.Event.html" title="struct tracing::event::Event">Event</a><'_>)</code><a class="srclink" href="../src/tracing_core/dispatcher.rs.html#522" title="goto source code">[src]</a></h4><div class="docblock"><p>Records that an <a href="../event/struct.Event.html"><code>Event</code></a> has occurred.</p>
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<p>This calls the <a href="../event/struct.Event.html"><code>event</code></a> function on the <a href="../subscriber/trait.Subscriber.html"><code>Subscriber</code></a> that this
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<code>Dispatch</code> forwards to.</p>
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</div><h4 id="method.enter" class="method"><code>pub fn <a href="#method.enter" class="fnname">enter</a>(&self, span: &<a class="struct" href="../tracing/span/struct.Id.html" title="struct tracing::span::Id">Id</a>)</code><a class="srclink" href="../src/tracing_core/dispatcher.rs.html#534" title="goto source code">[src]</a></h4><div class="docblock"><p>Records that a span has been can_enter.</p>
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<p>This calls the <a href="../subscriber/trait.Subscriber.html#method.enter"><code>enter</code></a> function on the <a href="../subscriber/trait.Subscriber.html"><code>Subscriber</code></a> that this
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<code>Dispatch</code> forwards to.</p>
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</div><h4 id="method.exit" class="method"><code>pub fn <a href="#method.exit" class="fnname">exit</a>(&self, span: &<a class="struct" href="../tracing/span/struct.Id.html" title="struct tracing::span::Id">Id</a>)</code><a class="srclink" href="../src/tracing_core/dispatcher.rs.html#546" title="goto source code">[src]</a></h4><div class="docblock"><p>Records that a span has been exited.</p>
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<p>This calls the <a href="../subscriber/trait.Subscriber.html#method.exit"><code>exit</code></a> function on the <a href="../subscriber/trait.Subscriber.html"><code>Subscriber</code></a> that this
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<code>Dispatch</code> forwards to.</p>
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</div><h4 id="method.clone_span" class="method"><code>pub fn <a href="#method.clone_span" class="fnname">clone_span</a>(&self, id: &<a class="struct" href="../tracing/span/struct.Id.html" title="struct tracing::span::Id">Id</a>) -> <a class="struct" href="../tracing/span/struct.Id.html" title="struct tracing::span::Id">Id</a></code><a class="srclink" href="../src/tracing_core/dispatcher.rs.html#565" title="goto source code">[src]</a></h4><div class="docblock"><p>Notifies the subscriber that a <a href="../span/struct.Id.html">span ID</a> has been cloned.</p>
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<p>This function must only be called with span IDs that were returned by
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this <code>Dispatch</code>'s <a href="../subscriber/trait.Subscriber.html#method.new_span"><code>new_span</code></a> function. The <code>tracing</code> crate upholds
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this guarantee and any other libraries implementing instrumentation APIs
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must as well.</p>
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<p>This calls the <a href="../subscriber/trait.Subscriber.html#method.clone_span"><code>clone_span</code></a> function on the <code>Subscriber</code> that this
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<code>Dispatch</code> forwards to.</p>
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</div><h4 id="method.drop_span" class="method"><code>pub fn <a href="#method.drop_span" class="fnname">drop_span</a>(&self, id: <a class="struct" href="../tracing/span/struct.Id.html" title="struct tracing::span::Id">Id</a>)</code><a class="srclink" href="../src/tracing_core/dispatcher.rs.html#595" title="goto source code">[src]</a></h4><div class="item-info"><div class="stab deprecated"><span class="emoji">👎</span> Deprecated since 0.1.2: <p>use <code>Dispatch::try_close</code> instead</p>
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</div></div><div class="docblock"><p>Notifies the subscriber that a <a href="../span/struct.Id.html">span ID</a> has been dropped.</p>
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<p>This function must only be called with span IDs that were returned by
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this <code>Dispatch</code>'s <a href="../subscriber/trait.Subscriber.html#method.new_span"><code>new_span</code></a> function. The <code>tracing</code> crate upholds
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this guarantee and any other libraries implementing instrumentation APIs
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must as well.</p>
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<p>This calls the <a href="../subscriber/trait.Subscriber.html#method.drop_span"><code>drop_span</code></a> function on the <a href="../subscriber/trait.Subscriber.html"><code>Subscriber</code></a> that this
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<code>Dispatch</code> forwards to.</p>
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<div class="information">
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<div class="tooltip compile_fail" style="">⚠ ️<span class="tooltiptext">Warning</span></div>
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</div>
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<div class="example-wrap" style="display:inline-block"><pre class="compile_fail" style="white-space:normal;font:inherit;">
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<strong>Deprecated</strong>: The <a href="#method.try_close"><code>try_close</code></a>
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method is functionally identical, but returns <code>true</code> if the span is now closed.
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It should be used instead of this method.
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</pre></div>
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</div><h4 id="method.try_close" class="method"><code>pub fn <a href="#method.try_close" class="fnname">try_close</a>(&self, id: <a class="struct" href="../tracing/span/struct.Id.html" title="struct tracing::span::Id">Id</a>) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a></code><a class="srclink" href="../src/tracing_core/dispatcher.rs.html#616" title="goto source code">[src]</a></h4><div class="docblock"><p>Notifies the subscriber that a <a href="../span/struct.Id.html">span ID</a> has been dropped, and returns
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<code>true</code> if there are now 0 IDs referring to that span.</p>
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<p>This function must only be called with span IDs that were returned by
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this <code>Dispatch</code>'s <a href="../subscriber/trait.Subscriber.html#method.new_span"><code>new_span</code></a> function. The <code>tracing</code> crate upholds
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this guarantee and any other libraries implementing instrumentation APIs
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must as well.</p>
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<p>This calls the <a href="../subscriber/trait.Subscriber.html#method.try_close"><code>try_close</code></a> function on the <a href="../subscriber/trait.Subscriber.html"><code>Subscriber</code></a> that this
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<code>Dispatch</code> forwards to.</p>
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</div><h4 id="method.current_span" class="method"><code>pub fn <a href="#method.current_span" class="fnname">current_span</a>(&self) -> <a class="struct" href="../tracing_core/span/struct.Current.html" title="struct tracing_core::span::Current">Current</a></code><a class="srclink" href="../src/tracing_core/dispatcher.rs.html#627" title="goto source code">[src]</a></h4><div class="docblock"><p>Returns a type representing this subscriber's view of the current span.</p>
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<p>This calls the <a href="../subscriber/trait.Subscriber.html#method.current"><code>current</code></a> function on the <code>Subscriber</code> that this
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<code>Dispatch</code> forwards to.</p>
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</div><h4 id="method.is" class="method"><code>pub fn <a href="#method.is" class="fnname">is</a><T>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a> <span class="where fmt-newline">where<br> T: <a class="trait" href="https://doc.rust-lang.org/nightly/core/any/trait.Any.html" title="trait core::any::Any">Any</a>, </span></code><a class="srclink" href="../src/tracing_core/dispatcher.rs.html#634" title="goto source code">[src]</a></h4><div class="docblock"><p>Returns <code>true</code> if this <code>Dispatch</code> forwards to a <code>Subscriber</code> of type
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<code>T</code>.</p>
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</div><h4 id="method.downcast_ref" class="method"><code>pub fn <a href="#method.downcast_ref" class="fnname">downcast_ref</a><T>(&self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&</a>T> <span class="where fmt-newline">where<br> T: <a class="trait" href="https://doc.rust-lang.org/nightly/core/any/trait.Any.html" title="trait core::any::Any">Any</a>, </span></code><a class="srclink" href="../src/tracing_core/dispatcher.rs.html#641" title="goto source code">[src]</a></h4><div class="docblock"><p>Returns some reference to the <code>Subscriber</code> this <code>Dispatch</code> forwards to
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if it is of type <code>T</code>, or <code>None</code> if it isn't.</p>
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</div></div><h2 id="trait-implementations" class="small-section-header">Trait Implementations<a href="#trait-implementations" class="anchor"></a></h2><div id="trait-implementations-list"><h3 id="impl-Clone" class="impl"><code class="in-band">impl <a class="trait" href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a> for <a class="struct" href="../tracing/struct.Dispatch.html" title="struct tracing::Dispatch">Dispatch</a></code><a href="#impl-Clone" class="anchor"></a><a class="srclink" href="../src/tracing_core/dispatcher.rs.html#159" title="goto source code">[src]</a></h3><div class="impl-items"><h4 id="method.clone" class="method hidden"><code>pub fn <a href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html#tymethod.clone" class="fnname">clone</a>(&self) -> <a class="struct" href="../tracing/struct.Dispatch.html" title="struct tracing::Dispatch">Dispatch</a></code><a class="srclink" href="../src/tracing_core/dispatcher.rs.html#159" title="goto source code">[src]</a></h4><div class='docblock hidden'><p>Returns a copy of the value. <a href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html#tymethod.clone">Read more</a></p>
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</div><h4 id="method.clone_from" class="method hidden"><code>pub fn <a href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html#method.clone_from" class="fnname">clone_from</a>(&mut self, source: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&</a>Self)</code><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span><a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/clone.rs.html#128" title="goto source code">[src]</a></h4><div class='docblock hidden'><p>Performs copy-assignment from <code>source</code>. <a href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html#method.clone_from">Read more</a></p>
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</div></div><h3 id="impl-Debug" class="impl"><code class="in-band">impl <a class="trait" href="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html" title="trait core::fmt::Debug">Debug</a> for <a class="struct" href="../tracing/struct.Dispatch.html" title="struct tracing::Dispatch">Dispatch</a></code><a href="#impl-Debug" class="anchor"></a><a class="srclink" href="../src/tracing_core/dispatcher.rs.html#653-657" title="goto source code">[src]</a></h3><div class="impl-items"><h4 id="method.fmt" class="method hidden"><code>pub fn <a href="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html#tymethod.fmt" class="fnname">fmt</a>(&self, f: &mut <a class="struct" href="https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html" title="struct core::fmt::Formatter">Formatter</a><'_>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, <a class="struct" href="https://doc.rust-lang.org/nightly/core/fmt/struct.Error.html" title="struct core::fmt::Error">Error</a>></code><a class="srclink" href="../src/tracing_core/dispatcher.rs.html#654" title="goto source code">[src]</a></h4><div class='docblock hidden'><p>Formats the value using the given formatter. <a href="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html#tymethod.fmt">Read more</a></p>
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</div></div><h3 id="impl-Default" class="impl"><code class="in-band">impl <a class="trait" href="https://doc.rust-lang.org/nightly/core/default/trait.Default.html" title="trait core::default::Default">Default</a> for <a class="struct" href="../tracing/struct.Dispatch.html" title="struct tracing::Dispatch">Dispatch</a></code><a href="#impl-Default" class="anchor"></a><a class="srclink" href="../src/tracing_core/dispatcher.rs.html#646-651" title="goto source code">[src]</a></h3><div class="impl-items"><h4 id="method.default" class="method"><code>pub fn <a href="https://doc.rust-lang.org/nightly/core/default/trait.Default.html#tymethod.default" class="fnname">default</a>() -> <a class="struct" href="../tracing/struct.Dispatch.html" title="struct tracing::Dispatch">Dispatch</a></code><a class="srclink" href="../src/tracing_core/dispatcher.rs.html#648" title="goto source code">[src]</a></h4><div class="docblock"><p>Returns the current default dispatcher</p>
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||
</div></div><h3 id="impl-From%3CS%3E" class="impl"><code class="in-band">impl<S> <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.From.html" title="trait core::convert::From">From</a><S> for <a class="struct" href="../tracing/struct.Dispatch.html" title="struct tracing::Dispatch">Dispatch</a> <span class="where fmt-newline">where<br> S: <a class="trait" href="../tracing/trait.Subscriber.html" title="trait tracing::Subscriber">Subscriber</a> + <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> + <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a> + 'static, </span></code><a href="#impl-From%3CS%3E" class="anchor"></a><a class="srclink" href="../src/tracing_core/dispatcher.rs.html#659-667" title="goto source code">[src]</a></h3><div class="impl-items"><h4 id="method.from" class="method hidden"><code>pub fn <a href="https://doc.rust-lang.org/nightly/core/convert/trait.From.html#tymethod.from" class="fnname">from</a>(subscriber: S) -> <a class="struct" href="../tracing/struct.Dispatch.html" title="struct tracing::Dispatch">Dispatch</a></code><a class="srclink" href="../src/tracing_core/dispatcher.rs.html#664" title="goto source code">[src]</a></h4><div class='docblock hidden'><p>Performs the conversion.</p>
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||
</div></div></div><h2 id="synthetic-implementations" class="small-section-header">Auto Trait Implementations<a href="#synthetic-implementations" class="anchor"></a></h2><div id="synthetic-implementations-list"><h3 id="impl-RefUnwindSafe" class="impl"><code class="in-band">impl !<a class="trait" href="https://doc.rust-lang.org/nightly/std/panic/trait.RefUnwindSafe.html" title="trait std::panic::RefUnwindSafe">RefUnwindSafe</a> for <a class="struct" href="../tracing/struct.Dispatch.html" title="struct tracing::Dispatch">Dispatch</a></code><a href="#impl-RefUnwindSafe" class="anchor"></a><a class="srclink" href="../src/tracing/lib.rs.html#1" title="goto source code">[src]</a></h3><div class="impl-items"></div><h3 id="impl-Send" class="impl"><code class="in-band">impl <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> for <a class="struct" href="../tracing/struct.Dispatch.html" title="struct tracing::Dispatch">Dispatch</a></code><a href="#impl-Send" class="anchor"></a><a class="srclink" href="../src/tracing/lib.rs.html#1" title="goto source code">[src]</a></h3><div class="impl-items"></div><h3 id="impl-Sync" class="impl"><code class="in-band">impl <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a> for <a class="struct" href="../tracing/struct.Dispatch.html" title="struct tracing::Dispatch">Dispatch</a></code><a href="#impl-Sync" class="anchor"></a><a class="srclink" href="../src/tracing/lib.rs.html#1" title="goto source code">[src]</a></h3><div class="impl-items"></div><h3 id="impl-Unpin" class="impl"><code class="in-band">impl <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a> for <a class="struct" href="../tracing/struct.Dispatch.html" title="struct tracing::Dispatch">Dispatch</a></code><a href="#impl-Unpin" class="anchor"></a><a class="srclink" href="../src/tracing/lib.rs.html#1" title="goto source code">[src]</a></h3><div class="impl-items"></div><h3 id="impl-UnwindSafe" class="impl"><code class="in-band">impl !<a class="trait" href="https://doc.rust-lang.org/nightly/std/panic/trait.UnwindSafe.html" title="trait std::panic::UnwindSafe">UnwindSafe</a> for <a class="struct" href="../tracing/struct.Dispatch.html" title="struct tracing::Dispatch">Dispatch</a></code><a href="#impl-UnwindSafe" class="anchor"></a><a class="srclink" href="../src/tracing/lib.rs.html#1" title="goto source code">[src]</a></h3><div class="impl-items"></div></div><h2 id="blanket-implementations" class="small-section-header">Blanket Implementations<a href="#blanket-implementations" class="anchor"></a></h2><div id="blanket-implementations-list"><h3 id="impl-Any" class="impl"><code class="in-band">impl<T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/any/trait.Any.html" title="trait core::any::Any">Any</a> for T <span class="where fmt-newline">where<br> T: 'static + ?<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>, </span></code><a href="#impl-Any" class="anchor"></a><a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/any.rs.html#131-135" title="goto source code">[src]</a></h3><div class="impl-items"><h4 id="method.type_id" class="method hidden"><code>pub fn <a href="https://doc.rust-lang.org/nightly/core/any/trait.Any.html#tymethod.type_id" class="fnname">type_id</a>(&self) -> <a class="struct" href="https://doc.rust-lang.org/nightly/core/any/struct.TypeId.html" title="struct core::any::TypeId">TypeId</a></code><a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/any.rs.html#132" title="goto source code">[src]</a></h4><div class='docblock hidden'><p>Gets the <code>TypeId</code> of <code>self</code>. <a href="https://doc.rust-lang.org/nightly/core/any/trait.Any.html#tymethod.type_id">Read more</a></p>
|
||
</div></div><h3 id="impl-Borrow%3CT%3E" class="impl"><code class="in-band">impl<T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/borrow/trait.Borrow.html" title="trait core::borrow::Borrow">Borrow</a><T> for T <span class="where fmt-newline">where<br> T: ?<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>, </span></code><a href="#impl-Borrow%3CT%3E" class="anchor"></a><a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/borrow.rs.html#207-211" title="goto source code">[src]</a></h3><div class="impl-items"><h4 id="method.borrow" class="method hidden"><code>pub fn <a href="https://doc.rust-lang.org/nightly/core/borrow/trait.Borrow.html#tymethod.borrow" class="fnname">borrow</a>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&</a>T</code><a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/borrow.rs.html#208" title="goto source code">[src]</a></h4><div class='docblock hidden'><p>Immutably borrows from an owned value. <a href="https://doc.rust-lang.org/nightly/core/borrow/trait.Borrow.html#tymethod.borrow">Read more</a></p>
|
||
</div></div><h3 id="impl-BorrowMut%3CT%3E" class="impl"><code class="in-band">impl<T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/borrow/trait.BorrowMut.html" title="trait core::borrow::BorrowMut">BorrowMut</a><T> for T <span class="where fmt-newline">where<br> T: ?<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>, </span></code><a href="#impl-BorrowMut%3CT%3E" class="anchor"></a><a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/borrow.rs.html#214-218" title="goto source code">[src]</a></h3><div class="impl-items"><h4 id="method.borrow_mut" class="method hidden"><code>pub fn <a href="https://doc.rust-lang.org/nightly/core/borrow/trait.BorrowMut.html#tymethod.borrow_mut" class="fnname">borrow_mut</a>(&mut self) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&mut </a>T</code><a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/borrow.rs.html#215" title="goto source code">[src]</a></h4><div class='docblock hidden'><p>Mutably borrows from an owned value. <a href="https://doc.rust-lang.org/nightly/core/borrow/trait.BorrowMut.html#tymethod.borrow_mut">Read more</a></p>
|
||
</div></div><h3 id="impl-From%3CT%3E" class="impl"><code class="in-band">impl<T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.From.html" title="trait core::convert::From">From</a><T> for T</code><a href="#impl-From%3CT%3E" class="anchor"></a><a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#545-549" title="goto source code">[src]</a></h3><div class="impl-items"><h4 id="method.from-1" class="method hidden"><code>pub fn <a href="https://doc.rust-lang.org/nightly/core/convert/trait.From.html#tymethod.from" class="fnname">from</a>(t: T) -> T</code><a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#546" title="goto source code">[src]</a></h4><div class='docblock hidden'><p>Performs the conversion.</p>
|
||
</div></div><h3 id="impl-Instrument" class="impl"><code class="in-band">impl<T> <a class="trait" href="../tracing/trait.Instrument.html" title="trait tracing::Instrument">Instrument</a> for T</code><a href="#impl-Instrument" class="anchor"></a><a class="srclink" href="../src/tracing/instrument.rs.html#155" title="goto source code">[src]</a></h3><div class="impl-items"><h4 id="method.instrument" class="method hidden"><code>fn <a href="../tracing/trait.Instrument.html#method.instrument" class="fnname">instrument</a>(self, span: <a class="struct" href="../tracing/struct.Span.html" title="struct tracing::Span">Span</a>) -> <a class="struct" href="../tracing/instrument/struct.Instrumented.html" title="struct tracing::instrument::Instrumented">Instrumented</a><Self><span class="notable-traits"><span class="notable-traits-tooltip">ⓘ<div class="notable-traits-tooltiptext"><span class="docblock"><h3 class="notable">Notable traits for <a class="struct" href="../tracing/instrument/struct.Instrumented.html" title="struct tracing::instrument::Instrumented">Instrumented</a><T></h3><code class="content"><span class="where fmt-newline">impl<T: <a class="trait" href="https://doc.rust-lang.org/nightly/core/future/future/trait.Future.html" title="trait core::future::future::Future">Future</a>> <a class="trait" href="https://doc.rust-lang.org/nightly/core/future/future/trait.Future.html" title="trait core::future::future::Future">Future</a> for <a class="struct" href="../tracing/instrument/struct.Instrumented.html" title="struct tracing::instrument::Instrumented">Instrumented</a><T></span><span class="where fmt-newline"> type <a href="https://doc.rust-lang.org/nightly/core/future/future/trait.Future.html#associatedtype.Output" class="type">Output</a> = T::<a class="type" href="https://doc.rust-lang.org/nightly/core/future/future/trait.Future.html#associatedtype.Output" title="type core::future::future::Future::Output">Output</a>;</span></code></span></div></span></span></code><a class="srclink" href="../src/tracing/instrument.rs.html#38-40" title="goto source code">[src]</a></h4><div class='docblock hidden'><p>Instruments this type with the provided <code>Span</code>, returning an
|
||
<code>Instrumented</code> wrapper. <a href="../tracing/trait.Instrument.html#method.instrument">Read more</a></p>
|
||
</div><h4 id="method.in_current_span" class="method hidden"><code>fn <a href="../tracing/trait.Instrument.html#method.in_current_span" class="fnname">in_current_span</a>(self) -> <a class="struct" href="../tracing/instrument/struct.Instrumented.html" title="struct tracing::instrument::Instrumented">Instrumented</a><Self><span class="notable-traits"><span class="notable-traits-tooltip">ⓘ<div class="notable-traits-tooltiptext"><span class="docblock"><h3 class="notable">Notable traits for <a class="struct" href="../tracing/instrument/struct.Instrumented.html" title="struct tracing::instrument::Instrumented">Instrumented</a><T></h3><code class="content"><span class="where fmt-newline">impl<T: <a class="trait" href="https://doc.rust-lang.org/nightly/core/future/future/trait.Future.html" title="trait core::future::future::Future">Future</a>> <a class="trait" href="https://doc.rust-lang.org/nightly/core/future/future/trait.Future.html" title="trait core::future::future::Future">Future</a> for <a class="struct" href="../tracing/instrument/struct.Instrumented.html" title="struct tracing::instrument::Instrumented">Instrumented</a><T></span><span class="where fmt-newline"> type <a href="https://doc.rust-lang.org/nightly/core/future/future/trait.Future.html#associatedtype.Output" class="type">Output</a> = T::<a class="type" href="https://doc.rust-lang.org/nightly/core/future/future/trait.Future.html#associatedtype.Output" title="type core::future::future::Future::Output">Output</a>;</span></code></span></div></span></span></code><a class="srclink" href="../src/tracing/instrument.rs.html#74-76" title="goto source code">[src]</a></h4><div class='docblock hidden'><p>Instruments this type with the <a href="../struct.Span.html#method.current">current</a> <code>Span</code>, returning an
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<code>Instrumented</code> wrapper. <a href="../tracing/trait.Instrument.html#method.in_current_span">Read more</a></p>
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||
</div></div><h3 id="impl-Into%3CU%3E" class="impl"><code class="in-band">impl<T, U> <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a><U> for T <span class="where fmt-newline">where<br> U: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.From.html" title="trait core::convert::From">From</a><T>, </span></code><a href="#impl-Into%3CU%3E" class="anchor"></a><a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#534-541" title="goto source code">[src]</a></h3><div class="impl-items"><h4 id="method.into" class="method hidden"><code>pub fn <a href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html#tymethod.into" class="fnname">into</a>(self) -> U</code><a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#538" title="goto source code">[src]</a></h4><div class='docblock hidden'><p>Performs the conversion.</p>
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</div></div><h3 id="impl-ToOwned" class="impl"><code class="in-band">impl<T> <a class="trait" href="https://doc.rust-lang.org/nightly/alloc/borrow/trait.ToOwned.html" title="trait alloc::borrow::ToOwned">ToOwned</a> for T <span class="where fmt-newline">where<br> T: <a class="trait" href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a>, </span></code><a href="#impl-ToOwned" class="anchor"></a><a class="srclink" href="https://doc.rust-lang.org/nightly/src/alloc/borrow.rs.html#80-92" title="goto source code">[src]</a></h3><div class="impl-items"><h4 id="associatedtype.Owned" class="type"><code>type <a href="https://doc.rust-lang.org/nightly/alloc/borrow/trait.ToOwned.html#associatedtype.Owned" class="type">Owned</a> = T</code></h4><div class='docblock'><p>The resulting type after obtaining ownership.</p>
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</div><h4 id="method.to_owned" class="method hidden"><code>pub fn <a href="https://doc.rust-lang.org/nightly/alloc/borrow/trait.ToOwned.html#tymethod.to_owned" class="fnname">to_owned</a>(&self) -> T</code><a class="srclink" href="https://doc.rust-lang.org/nightly/src/alloc/borrow.rs.html#85" title="goto source code">[src]</a></h4><div class='docblock hidden'><p>Creates owned data from borrowed data, usually by cloning. <a href="https://doc.rust-lang.org/nightly/alloc/borrow/trait.ToOwned.html#tymethod.to_owned">Read more</a></p>
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</div><h4 id="method.clone_into" class="method hidden"><code>pub fn <a href="https://doc.rust-lang.org/nightly/alloc/borrow/trait.ToOwned.html#method.clone_into" class="fnname">clone_into</a>(&self, target: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&mut </a>T)</code><a class="srclink" href="https://doc.rust-lang.org/nightly/src/alloc/borrow.rs.html#89" title="goto source code">[src]</a></h4><div class="item-info hidden"><div class="stab unstable"><details><summary><span class="emoji">🔬</span> This is a nightly-only experimental API. (<code>toowned_clone_into</code> <a href="https://github.com/tokio-rs/tracing/issues/41263">#41263</a>)</summary><p>recently added</p>
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</details></div></div><div class='docblock hidden'><p>Uses borrowed data to replace owned data, usually by cloning. <a href="https://doc.rust-lang.org/nightly/alloc/borrow/trait.ToOwned.html#method.clone_into">Read more</a></p>
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</div></div><h3 id="impl-TryFrom%3CU%3E" class="impl"><code class="in-band">impl<T, U> <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><U> for T <span class="where fmt-newline">where<br> U: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a><T>, </span></code><a href="#impl-TryFrom%3CU%3E" class="anchor"></a><a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#582-591" title="goto source code">[src]</a></h3><div class="impl-items"><h4 id="associatedtype.Error" class="type"><code>type <a href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#associatedtype.Error" class="type">Error</a> = <a class="enum" href="https://doc.rust-lang.org/nightly/core/convert/enum.Infallible.html" title="enum core::convert::Infallible">Infallible</a></code></h4><div class='docblock'><p>The type returned in the event of a conversion error.</p>
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</div><h4 id="method.try_from" class="method hidden"><code>pub fn <a href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#tymethod.try_from" class="fnname">try_from</a>(value: U) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><T, <T as <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><U>>::<a class="type" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a>></code><a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#588" title="goto source code">[src]</a></h4><div class='docblock hidden'><p>Performs the conversion.</p>
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</div></div><h3 id="impl-TryInto%3CU%3E" class="impl"><code class="in-band">impl<T, U> <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryInto.html" title="trait core::convert::TryInto">TryInto</a><U> for T <span class="where fmt-newline">where<br> U: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><T>, </span></code><a href="#impl-TryInto%3CU%3E" class="anchor"></a><a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#568-577" title="goto source code">[src]</a></h3><div class="impl-items"><h4 id="associatedtype.Error-1" class="type"><code>type <a href="https://doc.rust-lang.org/nightly/core/convert/trait.TryInto.html#associatedtype.Error" class="type">Error</a> = <U as <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><T>>::<a class="type" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a></code></h4><div class='docblock'><p>The type returned in the event of a conversion error.</p>
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||
</div><h4 id="method.try_into" class="method hidden"><code>pub fn <a href="https://doc.rust-lang.org/nightly/core/convert/trait.TryInto.html#tymethod.try_into" class="fnname">try_into</a>(self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><U, <U as <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><T>>::<a class="type" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a>></code><a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#574" title="goto source code">[src]</a></h4><div class='docblock hidden'><p>Performs the conversion.</p>
|
||
</div></div></div></section><section id="search" class="content hidden"></section><section class="footer"></section><div id="rustdoc-vars" data-root-path="../" data-current-crate="tracing"></div>
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