| <!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="`Dispatch` trace data to a [`Subscriber`]."><meta name="keywords" content="rust, rustlang, rust-lang, Dispatch"><title>Dispatch in tracing_core - Rust</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../SourceSerif4-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../FiraSans-Regular.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../FiraSans-Medium.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../SourceCodePro-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../SourceSerif4-Bold.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../SourceCodePro-Semibold.ttf.woff2"><link rel="stylesheet" href="../normalize.css"><link rel="stylesheet" href="../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" href="../ayu.css" disabled><link rel="stylesheet" href="../dark.css" disabled><link rel="stylesheet" href="../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../storage.js"></script><script defer src="sidebar-items.js"></script><script defer src="../main.js"></script><noscript><link rel="stylesheet" href="../noscript.css"></noscript><link rel="alternate icon" type="image/png" href="../favicon-16x16.png"><link rel="alternate icon" type="image/png" href="../favicon-32x32.png"><link rel="icon" type="image/svg+xml" href="../favicon.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">☰</button><a class="sidebar-logo" href="../tracing_core/index.html"><div class="logo-container"><img src="https://raw.githubusercontent.com/tokio-rs/tracing/master/assets/logo-type.png" alt="logo"></div></a><h2></h2></nav><nav class="sidebar"><a class="sidebar-logo" href="../tracing_core/index.html"><div class="logo-container"> |
| <img src="https://raw.githubusercontent.com/tokio-rs/tracing/master/assets/logo-type.png" alt="logo"></div></a><h2 class="location"><a href="#">Dispatch</a></h2><div class="sidebar-elems"><section><h3><a href="#implementations">Methods</a></h3><ul class="block"><li><a href="#method.clone_span">clone_span</a></li><li><a href="#method.current_span">current_span</a></li><li><a href="#method.downcast_ref">downcast_ref</a></li><li><a href="#method.downgrade">downgrade</a></li><li><a href="#method.drop_span">drop_span</a></li><li><a href="#method.enabled">enabled</a></li><li><a href="#method.enter">enter</a></li><li><a href="#method.event">event</a></li><li><a href="#method.exit">exit</a></li><li><a href="#method.is">is</a></li><li><a href="#method.new">new</a></li><li><a href="#method.new_span">new_span</a></li><li><a href="#method.none">none</a></li><li><a href="#method.record">record</a></li><li><a href="#method.record_follows_from">record_follows_from</a></li><li><a href="#method.register_callsite">register_callsite</a></li><li><a href="#method.try_close">try_close</a></li></ul><h3><a href="#trait-implementations">Trait Implementations</a></h3><ul class="block"><li><a href="#impl-Clone-for-Dispatch">Clone</a></li><li><a href="#impl-Debug-for-Dispatch">Debug</a></li><li><a href="#impl-Default-for-Dispatch">Default</a></li><li><a href="#impl-From%3CS%3E-for-Dispatch">From<S></a></li></ul><h3><a href="#synthetic-implementations">Auto Trait Implementations</a></h3><ul class="block"><li><a href="#impl-RefUnwindSafe-for-Dispatch">!RefUnwindSafe</a></li><li><a href="#impl-Send-for-Dispatch">Send</a></li><li><a href="#impl-Sync-for-Dispatch">Sync</a></li><li><a href="#impl-Unpin-for-Dispatch">Unpin</a></li><li><a href="#impl-UnwindSafe-for-Dispatch">!UnwindSafe</a></li></ul><h3><a href="#blanket-implementations">Blanket Implementations</a></h3><ul class="block"><li><a href="#impl-Any-for-Dispatch">Any</a></li><li><a href="#impl-Borrow%3CT%3E-for-Dispatch">Borrow<T></a></li><li><a href="#impl-BorrowMut%3CT%3E-for-Dispatch">BorrowMut<T></a></li><li><a href="#impl-From%3CT%3E-for-Dispatch">From<T></a></li><li><a href="#impl-Into%3CU%3E-for-Dispatch">Into<U></a></li><li><a href="#impl-ToOwned-for-Dispatch">ToOwned</a></li><li><a href="#impl-TryFrom%3CU%3E-for-Dispatch">TryFrom<U></a></li><li><a href="#impl-TryInto%3CU%3E-for-Dispatch">TryInto<U></a></li></ul></section><h2><a href="index.html">In tracing_core</a></h2></div></nav><main><div class="width-limiter"><nav class="sub"><form class="search-form"><div class="search-container"><span></span><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><div id="help-button" title="help" tabindex="-1"><a href="../help.html">?</a></div><div id="settings-menu" tabindex="-1"><a href="../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../wheel.svg"></a></div></div></form></nav><section id="main-content" class="content"><div class="main-heading"><h1 class="fqn">Struct <a href="index.html">tracing_core</a>::<wbr><a class="struct" href="#">Dispatch</a><button id="copy-path" onclick="copy_path(this)" title="Copy item path to clipboard"><img src="../clipboard.svg" width="19" height="18" alt="Copy item path"></button></h1><span class="out-of-band"><a class="srclink" href="../src/tracing_core/dispatcher.rs.html#155-157">source</a> · <a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class="inner">−</span>]</a></span></div><div class="item-decl"><pre class="rust struct"><code>pub struct Dispatch { /* private fields */ }</code></pre></div><details class="rustdoc-toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p><code>Dispatch</code> trace data to a <a href="trait.Subscriber.html" title="Subscriber"><code>Subscriber</code></a>.</p> |
| </div></details><h2 id="implementations" class="small-section-header">Implementations<a href="#implementations" class="anchor"></a></h2><div id="implementations-list"><details class="rustdoc-toggle implementors-toggle" open><summary><section id="impl-Dispatch" class="impl has-srclink"><a class="srclink rightside" href="../src/tracing_core/dispatcher.rs.html#465-732">source</a><a href="#impl-Dispatch" class="anchor"></a><h3 class="code-header">impl <a class="struct" href="struct.Dispatch.html" title="struct tracing_core::Dispatch">Dispatch</a></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.none" class="method has-srclink"><a class="srclink rightside" href="../src/tracing_core/dispatcher.rs.html#468-472">source</a><h4 class="code-header">pub fn <a href="#method.none" class="fnname">none</a>() -> Self</h4></section></summary><div class="docblock"><p>Returns a new <code>Dispatch</code> that discards events and spans.</p> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.new" class="method has-srclink"><a class="srclink rightside" href="../src/tracing_core/dispatcher.rs.html#477-486">source</a><h4 class="code-header">pub fn <a href="#method.new" class="fnname">new</a><S>(subscriber: S) -> Self<span class="where fmt-newline">where<br> S: <a class="trait" href="trait.Subscriber.html" title="trait tracing_core::Subscriber">Subscriber</a> + Send + Sync + 'static,</span></h4></section></summary><div class="docblock"><p>Returns a <code>Dispatch</code> that forwards to the given <a href="trait.Subscriber.html"><code>Subscriber</code></a>.</p> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.downgrade" class="method has-srclink"><a class="srclink rightside" href="../src/tracing_core/dispatcher.rs.html#507-511">source</a><h4 class="code-header">pub fn <a href="#method.downgrade" class="fnname">downgrade</a>(&self) -> <a class="struct" href="dispatcher/struct.WeakDispatch.html" title="struct tracing_core::dispatcher::WeakDispatch">WeakDispatch</a></h4></section></summary><div class="docblock"><p>Creates a <a href="dispatcher/struct.WeakDispatch.html" title="WeakDispatch"><code>WeakDispatch</code></a> from this <code>Dispatch</code>.</p> |
| <p>A <a href="dispatcher/struct.WeakDispatch.html" title="WeakDispatch"><code>WeakDispatch</code></a> is similar to a <a href="struct.Dispatch.html" title="Dispatch"><code>Dispatch</code></a>, but it does not prevent |
| the underlying <a href="trait.Subscriber.html" title="Subscriber"><code>Subscriber</code></a> from being dropped. Instead, it only permits |
| access while other references to the <code>Subscriber</code> exist. This is equivalent |
| to the standard library’s <a href="std::sync::Arc::downgrade"><code>Arc::downgrade</code></a> method, but for <code>Dispatch</code> |
| rather than <code>Arc</code>.</p> |
| <p>The primary use for creating a <a href="dispatcher/struct.WeakDispatch.html" title="WeakDispatch"><code>WeakDispatch</code></a> is to allow a <code>Subscriber</code> |
| to hold a cyclical reference to itself without creating a memory leak. |
| See <a href="trait.Subscriber.html#avoiding-memory-leaks">here</a> for details.</p> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.register_callsite" class="method has-srclink"><a class="srclink rightside" href="../src/tracing_core/dispatcher.rs.html#530-532">source</a><h4 class="code-header">pub fn <a href="#method.register_callsite" class="fnname">register_callsite</a>(&self, metadata: &'static <a class="struct" href="struct.Metadata.html" title="struct tracing_core::Metadata">Metadata</a><'static>) -> <a class="struct" href="subscriber/struct.Interest.html" title="struct tracing_core::subscriber::Interest">Interest</a></h4></section></summary><div class="docblock"><p>Registers a new callsite with this collector, returning whether or not |
| the collector is interested in being notified about the callsite.</p> |
| <p>This calls the <a href="trait.Subscriber.html#method.register_callsite"><code>register_callsite</code></a> function on the <a href="trait.Subscriber.html"><code>Subscriber</code></a> |
| that this <code>Dispatch</code> forwards to.</p> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.new_span" class="method has-srclink"><a class="srclink rightside" href="../src/tracing_core/dispatcher.rs.html#560-562">source</a><h4 class="code-header">pub fn <a href="#method.new_span" class="fnname">new_span</a>(&self, span: &<a class="struct" href="span/struct.Attributes.html" title="struct tracing_core::span::Attributes">Attributes</a><'_>) -> <a class="struct" href="span/struct.Id.html" title="struct tracing_core::span::Id">Id</a></h4></section></summary><div class="docblock"><p>Record the construction of a new span, returning a new <a href="span/struct.Id.html">ID</a> for the |
| span being constructed.</p> |
| <p>This calls the <a href="trait.Subscriber.html#tymethod.new_span"><code>new_span</code></a> function on the <a href="trait.Subscriber.html"><code>Subscriber</code></a> that this |
| <code>Dispatch</code> forwards to.</p> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.record" class="method has-srclink"><a class="srclink rightside" href="../src/tracing_core/dispatcher.rs.html#572-574">source</a><h4 class="code-header">pub fn <a href="#method.record" class="fnname">record</a>(&self, span: &<a class="struct" href="span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>, values: &<a class="struct" href="span/struct.Record.html" title="struct tracing_core::span::Record">Record</a><'_>)</h4></section></summary><div class="docblock"><p>Record a set of values on a span.</p> |
| <p>This calls the <a href="trait.Subscriber.html#tymethod.record"><code>record</code></a> function on the <a href="trait.Subscriber.html"><code>Subscriber</code></a> that this |
| <code>Dispatch</code> forwards to.</p> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.record_follows_from" class="method has-srclink"><a class="srclink rightside" href="../src/tracing_core/dispatcher.rs.html#585-587">source</a><h4 class="code-header">pub fn <a href="#method.record_follows_from" class="fnname">record_follows_from</a>(&self, span: &<a class="struct" href="span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>, follows: &<a class="struct" href="span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>)</h4></section></summary><div class="docblock"><p>Adds an indication that <code>span</code> follows from the span with the id |
| <code>follows</code>.</p> |
| <p>This calls the <a href="trait.Subscriber.html#tymethod.record_follows_from"><code>record_follows_from</code></a> function on the <a href="trait.Subscriber.html"><code>Subscriber</code></a> |
| that this <code>Dispatch</code> forwards to.</p> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.enabled" class="method has-srclink"><a class="srclink rightside" href="../src/tracing_core/dispatcher.rs.html#599-601">source</a><h4 class="code-header">pub fn <a href="#method.enabled" class="fnname">enabled</a>(&self, metadata: &<a class="struct" href="struct.Metadata.html" title="struct tracing_core::Metadata">Metadata</a><'_>) -> bool</h4></section></summary><div class="docblock"><p>Returns true if a span with the specified <a href="struct.Metadata.html">metadata</a> would be |
| recorded.</p> |
| <p>This calls the <a href="trait.Subscriber.html#tymethod.enabled"><code>enabled</code></a> function on the <a href="trait.Subscriber.html"><code>Subscriber</code></a> that this |
| <code>Dispatch</code> forwards to.</p> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.event" class="method has-srclink"><a class="srclink rightside" href="../src/tracing_core/dispatcher.rs.html#612-617">source</a><h4 class="code-header">pub fn <a href="#method.event" class="fnname">event</a>(&self, event: &<a class="struct" href="struct.Event.html" title="struct tracing_core::Event">Event</a><'_>)</h4></section></summary><div class="docblock"><p>Records that an <a href="struct.Event.html"><code>Event</code></a> has occurred.</p> |
| <p>This calls the <a href="struct.Event.html"><code>event</code></a> function on the <a href="trait.Subscriber.html"><code>Subscriber</code></a> that this |
| <code>Dispatch</code> forwards to.</p> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.enter" class="method has-srclink"><a class="srclink rightside" href="../src/tracing_core/dispatcher.rs.html#626-628">source</a><h4 class="code-header">pub fn <a href="#method.enter" class="fnname">enter</a>(&self, span: &<a class="struct" href="span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>)</h4></section></summary><div class="docblock"><p>Records that a span has been can_enter.</p> |
| <p>This calls the <a href="trait.Subscriber.html#tymethod.enter"><code>enter</code></a> function on the <a href="trait.Subscriber.html"><code>Subscriber</code></a> that this |
| <code>Dispatch</code> forwards to.</p> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.exit" class="method has-srclink"><a class="srclink rightside" href="../src/tracing_core/dispatcher.rs.html#637-639">source</a><h4 class="code-header">pub fn <a href="#method.exit" class="fnname">exit</a>(&self, span: &<a class="struct" href="span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>)</h4></section></summary><div class="docblock"><p>Records that a span has been exited.</p> |
| <p>This calls the <a href="trait.Subscriber.html#tymethod.exit"><code>exit</code></a> function on the <a href="trait.Subscriber.html"><code>Subscriber</code></a> that this |
| <code>Dispatch</code> forwards to.</p> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.clone_span" class="method has-srclink"><a class="srclink rightside" href="../src/tracing_core/dispatcher.rs.html#656-658">source</a><h4 class="code-header">pub fn <a href="#method.clone_span" class="fnname">clone_span</a>(&self, id: &<a class="struct" href="span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>) -> <a class="struct" href="span/struct.Id.html" title="struct tracing_core::span::Id">Id</a></h4></section></summary><div class="docblock"><p>Notifies the subscriber that a <a href="span/struct.Id.html">span ID</a> has been cloned.</p> |
| <p>This function must only be called with span IDs that were returned by |
| this <code>Dispatch</code>’s <a href="trait.Subscriber.html#tymethod.new_span"><code>new_span</code></a> function. The <code>tracing</code> crate upholds |
| this guarantee and any other libraries implementing instrumentation APIs |
| must as well.</p> |
| <p>This calls the <a href="trait.Subscriber.html#method.clone_span"><code>clone_span</code></a> function on the <code>Subscriber</code> that this |
| <code>Dispatch</code> forwards to.</p> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.drop_span" class="method has-srclink"><a class="srclink rightside" href="../src/tracing_core/dispatcher.rs.html#684-687">source</a><h4 class="code-header">pub fn <a href="#method.drop_span" class="fnname">drop_span</a>(&self, id: <a class="struct" href="span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>)</h4></section><span class="item-info"><div class="stab deprecated"><span class="emoji">👎</span><span>Deprecated since 0.1.2: use <code>Dispatch::try_close</code> instead</span></div></span></summary><div class="docblock"><p>Notifies the subscriber that a <a href="span/struct.Id.html">span ID</a> has been dropped.</p> |
| <p>This function must only be called with span IDs that were returned by |
| this <code>Dispatch</code>’s <a href="trait.Subscriber.html#tymethod.new_span"><code>new_span</code></a> function. The <code>tracing</code> crate upholds |
| this guarantee and any other libraries implementing instrumentation APIs |
| must as well.</p> |
| <p>This calls the <a href="trait.Subscriber.html#method.drop_span"><code>drop_span</code></a> function on the <a href="trait.Subscriber.html"><code>Subscriber</code></a> that this |
| <code>Dispatch</code> forwards to.</p> |
| <pre class="compile_fail" style="white-space:normal;font:inherit;"> |
| <strong>Deprecated</strong>: The <a href="#method.try_close"><code> |
| try_close</code></a> method is functionally identical, but returns |
| <code>true</code> if the span is now closed. It should be used |
| instead of this method. |
| </pre> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.try_close" class="method has-srclink"><a class="srclink rightside" href="../src/tracing_core/dispatcher.rs.html#704-706">source</a><h4 class="code-header">pub fn <a href="#method.try_close" class="fnname">try_close</a>(&self, id: <a class="struct" href="span/struct.Id.html" title="struct tracing_core::span::Id">Id</a>) -> bool</h4></section></summary><div class="docblock"><p>Notifies the subscriber that a <a href="span/struct.Id.html">span ID</a> has been dropped, and returns |
| <code>true</code> if there are now 0 IDs referring to that span.</p> |
| <p>This function must only be called with span IDs that were returned by |
| this <code>Dispatch</code>’s <a href="trait.Subscriber.html#tymethod.new_span"><code>new_span</code></a> function. The <code>tracing</code> crate upholds |
| this guarantee and any other libraries implementing instrumentation APIs |
| must as well.</p> |
| <p>This calls the <a href="trait.Subscriber.html#method.try_close"><code>try_close</code></a> function on the <a href="trait.Subscriber.html"><code>Subscriber</code></a> that this |
| <code>Dispatch</code> forwards to.</p> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.current_span" class="method has-srclink"><a class="srclink rightside" href="../src/tracing_core/dispatcher.rs.html#715-717">source</a><h4 class="code-header">pub fn <a href="#method.current_span" class="fnname">current_span</a>(&self) -> <a class="struct" href="span/struct.Current.html" title="struct tracing_core::span::Current">Current</a></h4></section></summary><div class="docblock"><p>Returns a type representing this subscriber’s view of the current span.</p> |
| <p>This calls the <a href="trait.Subscriber.html#method.current_span"><code>current</code></a> function on the <code>Subscriber</code> that this |
| <code>Dispatch</code> forwards to.</p> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.is" class="method has-srclink"><a class="srclink rightside" href="../src/tracing_core/dispatcher.rs.html#722-724">source</a><h4 class="code-header">pub fn <a href="#method.is" class="fnname">is</a><T: Any>(&self) -> bool</h4></section></summary><div class="docblock"><p>Returns <code>true</code> if this <code>Dispatch</code> forwards to a <code>Subscriber</code> of type |
| <code>T</code>.</p> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.downcast_ref" class="method has-srclink"><a class="srclink rightside" href="../src/tracing_core/dispatcher.rs.html#729-731">source</a><h4 class="code-header">pub fn <a href="#method.downcast_ref" class="fnname">downcast_ref</a><T: Any>(&self) -> Option<&T></h4></section></summary><div class="docblock"><p>Returns some reference to the <code>Subscriber</code> this <code>Dispatch</code> forwards to |
| if it is of type <code>T</code>, or <code>None</code> if it isn’t.</p> |
| </div></details></div></details></div><h2 id="trait-implementations" class="small-section-header">Trait Implementations<a href="#trait-implementations" class="anchor"></a></h2><div id="trait-implementations-list"><details class="rustdoc-toggle implementors-toggle" open><summary><section id="impl-Clone-for-Dispatch" class="impl has-srclink"><a class="srclink rightside" href="../src/tracing_core/dispatcher.rs.html#154">source</a><a href="#impl-Clone-for-Dispatch" class="anchor"></a><h3 class="code-header">impl Clone for <a class="struct" href="struct.Dispatch.html" title="struct tracing_core::Dispatch">Dispatch</a></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.clone" class="method trait-impl has-srclink"><a class="srclink rightside" href="../src/tracing_core/dispatcher.rs.html#154">source</a><a href="#method.clone" class="anchor"></a><h4 class="code-header">fn <a class="fnname">clone</a>(&self) -> <a class="struct" href="struct.Dispatch.html" title="struct tracing_core::Dispatch">Dispatch</a></h4></section></summary><div class='docblock'>Returns a copy of the value. <a>Read more</a></div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.clone_from" class="method trait-impl has-srclink"><span class="since rightside" title="Stable since Rust version 1.0.0">1.0.0</span><a href="#method.clone_from" class="anchor"></a><h4 class="code-header">const fn <a class="fnname">clone_from</a>(&mut self, source: &Self)</h4></section></summary><div class='docblock'>Performs copy-assignment from <code>source</code>. <a>Read more</a></div></details></div></details><details class="rustdoc-toggle implementors-toggle" open><summary><section id="impl-Debug-for-Dispatch" class="impl has-srclink"><a class="srclink rightside" href="../src/tracing_core/dispatcher.rs.html#741-754">source</a><a href="#impl-Debug-for-Dispatch" class="anchor"></a><h3 class="code-header">impl Debug for <a class="struct" href="struct.Dispatch.html" title="struct tracing_core::Dispatch">Dispatch</a></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.fmt" class="method trait-impl has-srclink"><a class="srclink rightside" href="../src/tracing_core/dispatcher.rs.html#742-753">source</a><a href="#method.fmt" class="anchor"></a><h4 class="code-header">fn <a class="fnname">fmt</a>(&self, f: &mut Formatter<'_>) -> Result</h4></section></summary><div class='docblock'>Formats the value using the given formatter. <a>Read more</a></div></details></div></details><details class="rustdoc-toggle implementors-toggle" open><summary><section id="impl-Default-for-Dispatch" class="impl has-srclink"><a class="srclink rightside" href="../src/tracing_core/dispatcher.rs.html#734-739">source</a><a href="#impl-Default-for-Dispatch" class="anchor"></a><h3 class="code-header">impl Default for <a class="struct" href="struct.Dispatch.html" title="struct tracing_core::Dispatch">Dispatch</a></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.default" class="method trait-impl has-srclink"><a class="srclink rightside" href="../src/tracing_core/dispatcher.rs.html#736-738">source</a><a href="#method.default" class="anchor"></a><h4 class="code-header">fn <a class="fnname">default</a>() -> Self</h4></section></summary><div class="docblock"><p>Returns the current default dispatcher</p> |
| </div></details></div></details><details class="rustdoc-toggle implementors-toggle" open><summary><section id="impl-From%3CS%3E-for-Dispatch" class="impl has-srclink"><a class="srclink rightside" href="../src/tracing_core/dispatcher.rs.html#756-764">source</a><a href="#impl-From%3CS%3E-for-Dispatch" class="anchor"></a><h3 class="code-header">impl<S> From<S> for <a class="struct" href="struct.Dispatch.html" title="struct tracing_core::Dispatch">Dispatch</a><span class="where fmt-newline">where<br> S: <a class="trait" href="trait.Subscriber.html" title="trait tracing_core::Subscriber">Subscriber</a> + Send + Sync + 'static,</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.from" class="method trait-impl has-srclink"><a class="srclink rightside" href="../src/tracing_core/dispatcher.rs.html#761-763">source</a><a href="#method.from" class="anchor"></a><h4 class="code-header">fn <a class="fnname">from</a>(subscriber: S) -> Self</h4></section></summary><div class='docblock'>Converts to this type from the input type.</div></details></div></details></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"><section id="impl-RefUnwindSafe-for-Dispatch" class="impl has-srclink"><a href="#impl-RefUnwindSafe-for-Dispatch" class="anchor"></a><h3 class="code-header">impl !RefUnwindSafe for <a class="struct" href="struct.Dispatch.html" title="struct tracing_core::Dispatch">Dispatch</a></h3></section><section id="impl-Send-for-Dispatch" class="impl has-srclink"><a href="#impl-Send-for-Dispatch" class="anchor"></a><h3 class="code-header">impl Send for <a class="struct" href="struct.Dispatch.html" title="struct tracing_core::Dispatch">Dispatch</a></h3></section><section id="impl-Sync-for-Dispatch" class="impl has-srclink"><a href="#impl-Sync-for-Dispatch" class="anchor"></a><h3 class="code-header">impl Sync for <a class="struct" href="struct.Dispatch.html" title="struct tracing_core::Dispatch">Dispatch</a></h3></section><section id="impl-Unpin-for-Dispatch" class="impl has-srclink"><a href="#impl-Unpin-for-Dispatch" class="anchor"></a><h3 class="code-header">impl Unpin for <a class="struct" href="struct.Dispatch.html" title="struct tracing_core::Dispatch">Dispatch</a></h3></section><section id="impl-UnwindSafe-for-Dispatch" class="impl has-srclink"><a href="#impl-UnwindSafe-for-Dispatch" class="anchor"></a><h3 class="code-header">impl !UnwindSafe for <a class="struct" href="struct.Dispatch.html" title="struct tracing_core::Dispatch">Dispatch</a></h3></section></div><h2 id="blanket-implementations" class="small-section-header">Blanket Implementations<a href="#blanket-implementations" class="anchor"></a></h2><div id="blanket-implementations-list"><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-Any-for-Dispatch" class="impl has-srclink"><a href="#impl-Any-for-Dispatch" class="anchor"></a><h3 class="code-header">impl<T> Any for T<span class="where fmt-newline">where<br> T: 'static + ?Sized,</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.type_id" class="method trait-impl has-srclink"><a href="#method.type_id" class="anchor"></a><h4 class="code-header">fn <a class="fnname">type_id</a>(&self) -> TypeId</h4></section></summary><div class='docblock'>Gets the <code>TypeId</code> of <code>self</code>. <a>Read more</a></div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-Borrow%3CT%3E-for-Dispatch" class="impl has-srclink"><a href="#impl-Borrow%3CT%3E-for-Dispatch" class="anchor"></a><h3 class="code-header">impl<T> Borrow<T> for T<span class="where fmt-newline">where<br> T: ?Sized,</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.borrow" class="method trait-impl has-srclink"><span class="since rightside" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/91522" title="Tracking issue for const_borrow">unstable</a></span><a href="#method.borrow" class="anchor"></a><h4 class="code-header">fn <a class="fnname">borrow</a>(&self) -> &T</h4></section></summary><div class='docblock'>Immutably borrows from an owned value. <a>Read more</a></div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-BorrowMut%3CT%3E-for-Dispatch" class="impl has-srclink"><a href="#impl-BorrowMut%3CT%3E-for-Dispatch" class="anchor"></a><h3 class="code-header">impl<T> BorrowMut<T> for T<span class="where fmt-newline">where<br> T: ?Sized,</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.borrow_mut" class="method trait-impl has-srclink"><span class="since rightside" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/91522" title="Tracking issue for const_borrow">unstable</a></span><a href="#method.borrow_mut" class="anchor"></a><h4 class="code-header">fn <a class="fnname">borrow_mut</a>(&mut self) -> &mut T</h4></section></summary><div class='docblock'>Mutably borrows from an owned value. <a>Read more</a></div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-From%3CT%3E-for-Dispatch" class="impl has-srclink"><a href="#impl-From%3CT%3E-for-Dispatch" class="anchor"></a><h3 class="code-header">impl<T> From<T> for T</h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.from-1" class="method trait-impl has-srclink"><span class="since rightside" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/88674" title="Tracking issue for const_convert">unstable</a></span><a href="#method.from-1" class="anchor"></a><h4 class="code-header">fn <a class="fnname">from</a>(t: T) -> T</h4></section></summary><div class="docblock"><p>Returns the argument unchanged.</p> |
| </div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-Into%3CU%3E-for-Dispatch" class="impl has-srclink"><a href="#impl-Into%3CU%3E-for-Dispatch" class="anchor"></a><h3 class="code-header">impl<T, U> Into<U> for T<span class="where fmt-newline">where<br> U: From<T>,</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.into" class="method trait-impl has-srclink"><span class="since rightside" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/88674" title="Tracking issue for const_convert">unstable</a></span><a href="#method.into" class="anchor"></a><h4 class="code-header">fn <a class="fnname">into</a>(self) -> 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>[From]<T> for U</code> chooses to do.</p> |
| </div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-ToOwned-for-Dispatch" class="impl has-srclink"><a href="#impl-ToOwned-for-Dispatch" class="anchor"></a><h3 class="code-header">impl<T> ToOwned for T<span class="where fmt-newline">where<br> T: Clone,</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle" open><summary><section id="associatedtype.Owned" class="associatedtype trait-impl has-srclink"><a href="#associatedtype.Owned" class="anchor"></a><h4 class="code-header">type <a class="associatedtype">Owned</a> = T</h4></section></summary><div class='docblock'>The resulting type after obtaining ownership.</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.to_owned" class="method trait-impl has-srclink"><a href="#method.to_owned" class="anchor"></a><h4 class="code-header">fn <a class="fnname">to_owned</a>(&self) -> T</h4></section></summary><div class='docblock'>Creates owned data from borrowed data, usually by cloning. <a>Read more</a></div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.clone_into" class="method trait-impl has-srclink"><a href="#method.clone_into" class="anchor"></a><h4 class="code-header">fn <a class="fnname">clone_into</a>(&self, target: &mut T)</h4></section></summary><div class='docblock'>Uses borrowed data to replace owned data, usually by cloning. <a>Read more</a></div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-TryFrom%3CU%3E-for-Dispatch" class="impl has-srclink"><a href="#impl-TryFrom%3CU%3E-for-Dispatch" class="anchor"></a><h3 class="code-header">impl<T, U> TryFrom<U> for T<span class="where fmt-newline">where<br> U: Into<T>,</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle" open><summary><section id="associatedtype.Error-1" class="associatedtype trait-impl has-srclink"><a href="#associatedtype.Error-1" class="anchor"></a><h4 class="code-header">type <a class="associatedtype">Error</a> = Infallible</h4></section></summary><div class='docblock'>The type returned in the event of a conversion error.</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.try_from" class="method trait-impl has-srclink"><span class="since rightside" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/88674" title="Tracking issue for const_convert">unstable</a></span><a href="#method.try_from" class="anchor"></a><h4 class="code-header">fn <a class="fnname">try_from</a>(value: U) -> Result<T, <T as TryFrom<U>>::Error></h4></section></summary><div class='docblock'>Performs the conversion.</div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-TryInto%3CU%3E-for-Dispatch" class="impl has-srclink"><a href="#impl-TryInto%3CU%3E-for-Dispatch" class="anchor"></a><h3 class="code-header">impl<T, U> TryInto<U> for T<span class="where fmt-newline">where<br> U: TryFrom<T>,</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle" open><summary><section id="associatedtype.Error" class="associatedtype trait-impl has-srclink"><a href="#associatedtype.Error" class="anchor"></a><h4 class="code-header">type <a class="associatedtype">Error</a> = <U as TryFrom<T>>::Error</h4></section></summary><div class='docblock'>The type returned in the event of a conversion error.</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.try_into" class="method trait-impl has-srclink"><span class="since rightside" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/88674" title="Tracking issue for const_convert">unstable</a></span><a href="#method.try_into" class="anchor"></a><h4 class="code-header">fn <a class="fnname">try_into</a>(self) -> Result<U, <U as TryFrom<T>>::Error></h4></section></summary><div class='docblock'>Performs the conversion.</div></details></div></details></div></section></div></main><div id="rustdoc-vars" data-root-path="../" data-current-crate="tracing_core" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |
