<!DOCTYPE html><htmllang="en"><head><metacharset="utf-8"><metaname="viewport"content="width=device-width, initial-scale=1.0"><metaname="generator"content="rustdoc"><metaname="description"content="A `MakeWriter` combinator that wraps a `MakeWriter` with a predicate for span and event `Metadata`, so that the `MakeWriter::make_writer_for` method returns `OptionalWriter::some` when the predicate returns `true`, and `OptionalWriter::none` when the predicate returns `false`."><title>WithFilter in tracing_subscriber::fmt::writer - Rust</title><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../../../static.files/SourceSerif4-Regular-46f98efaafac5295.ttf.woff2"><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../../../static.files/FiraSans-Regular-018c141bf0843ffd.woff2"><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../../../static.files/FiraSans-Medium-8f9a781e4970d388.woff2"><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../../../static.files/SourceCodePro-Regular-562dcc5011b6de7d.ttf.woff2"><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../../../static.files/SourceCodePro-Semibold-d899c5a5c4aeb14a.ttf.woff2"><linkrel="stylesheet"href="../../../static.files/normalize-76eba96aa4d2e634.css"><linkrel="stylesheet"href="../../../static.files/rustdoc-5bc39a1768837dd0.css"><metaname="rustdoc-vars"data-root-path="../../../"data-static-root-path="../../../static.files/"data-current-crate="tracing_subscriber"data-themes=""data-resource-suffix=""data-rustdoc-version="1.77.1 (7cf61ebde 2024-03-27)"data-channel="1.77.1"data-search-js="search-dd67cee4cfa65049.js"data-settings-js="settings-4313503d2e1961c2.js"><scriptsrc="../../../static.files/storage-4c98445ec4002617.js"></script><scriptdefersrc="sidebar-items.js"></script><scriptdefersrc="../../../static.files/main-48f368f3872407c8.js"></script><noscript><linkrel="stylesheet"href="../../../static.files/noscript-04d5337699b92874.css"></noscript><linkrel="alternate icon"type="image/png"href="../../../static.files/favicon-16x16-8b506e7a72182f1c.png"><linkrel="alternate icon"type="image/png"href="../../../static.files/favicon-32x32-422f7d1d52889060.png"><linkrel="icon"type="image/svg+xml"href="../../../static.files/favicon-2c020d218678b618.svg"></head><bodyclass="rustdoc struct"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><navclass="mobile-topbar"><buttonclass="sidebar-menu-toggle"title="show sidebar"></button><aclass="logo-container"href="../../../tracing_subscriber/index.html"><imgsrc="https://raw.githubusercontent.com/tokio-rs/tracing/master/assets/logo-type.png"alt=""></a></nav><navclass="sidebar"><divclass="sidebar-crate"><aclass="logo-container"href="../../../tracing_subscriber/index.html"><imgsrc="https://raw.githubusercontent.com/tokio-rs/tracing/master/assets/logo-type.png"alt="logo"></a><h2><ahref="../../../tracing_subscriber/index.html">tracing_subscriber</a><spanclass="version">0.3.18</span></h2></div><h2class="location"><ahref="#">WithFilter</a></h2><divclass="sidebar-elems"><section><h3><ahref="#implementations">Methods</a></h3><ulclass="block method"><li><ahref="#method.new">new</a></li></ul><h3><ahref="#trait-implementations">Trait Implementations</a></h3><ulclass="block trait-implementation"><li><ahref="#impl-Clone-for-WithFilter%3CM,+F%3E">Clone</a></li><li><ahref="#impl-Copy-for-WithFilter%3CM,+F%3E">Copy</a></li><li><ahref="#impl-Debug-for-WithFilter%3CM,+F%3E">Debug</a></li><li><ahref="#impl-Eq-for-WithFilter%3CM,+F%3E">Eq</a></li><li><ahref="#impl-MakeWriter%3C'a%3E-for-WithFilter%3CM,+F%3E">MakeWriter<'a></a></li><li><ahref="#impl-PartialEq-for-WithFilter%3CM,+F%3E">PartialEq</a></li><li><ahref="#impl-StructuralPartialEq-for-WithFilter%3CM,+F%3E">StructuralPartialEq</a></li></ul><h3><ahref="#synthetic-implementations">Auto Trait Implementations</a></h3><ulclass="block synthetic-implementation"><li><ahref="#impl
<main><divclass="width-limiter"><navclass="sub"><formclass="search-form"><span></span><divid="sidebar-button"tabindex="-1"><ahref="../../../tracing_subscriber/all.html"title="show sidebar"></a></div><inputclass="search-input"name="search"aria-label="Run search in the documentation"autocomplete="off"spellcheck="false"placeholder="Click or press ‘S’ to search, ‘?’ for more options…"type="search"><divid="help-button"tabindex="-1"><ahref="../../../help.html"title="help">?</a></div><divid="settings-menu"tabindex="-1"><ahref="../../../settings.html"title="settings"><imgwidth="22"height="22"alt="Change settings"src="../../../static.files/wheel-7b819b6101059cd0.svg"></a></div></form></nav><sectionid="main-content"class="content"><divclass="main-heading"><h1>Struct <ahref="../../index.html">tracing_subscriber</a>::<wbr><ahref="../index.html">fmt</a>::<wbr><ahref="index.html">writer</a>::<wbr><aclass="struct"href="#">WithFilter</a><buttonid="copy-path"title="Copy item path to clipboard"><imgsrc="../../../static.files/clipboard-7571035ce49a181d.svg"width="19"height="18"alt="Copy item path"></button></h1><spanclass="out-of-band"><aclass="src"href="../../../src/tracing_subscriber/fmt/writer.rs.html#609-612">source</a> · <buttonid="toggle-all-docs"title="collapse all docs">[<span>−</span>]</button></span></div><preclass="rust item-decl"><code>pub struct WithFilter<M, F> { <spanclass="comment">/* private fields */</span> }</code></pre><detailsclass="toggle top-doc"open><summaryclass="hideme"><span>Expand description</span></summary><divclass="docblock"><p>A <ahref="../trait.MakeWriter.html"title="trait tracing_subscriber::fmt::MakeWriter"><code>MakeWriter</code></a> combinator that wraps a <ahref="../trait.MakeWriter.html"title="trait tracing_subscriber::fmt::MakeWriter"><code>MakeWriter</code></a> with a predicate for
span and event <ahref="../../../tracing_core/metadata/struct.Metadata.html"title="struct tracing_core::metadata::Metadata"><code>Metadata</code></a>, so that the <ahref="../trait.MakeWriter.html#method.make_writer_for"title="method tracing_subscriber::fmt::MakeWriter::make_writer_for"><code>MakeWriter::make_writer_for</code></a>
method returns <ahref="enum.EitherWriter.html#method.some"title="associated function tracing_subscriber::fmt::writer::EitherWriter::some"><code>OptionalWriter::some</code></a> when the predicate returns <code>true</code>,
and <ahref="enum.EitherWriter.html#method.none"title="associated function tracing_subscriber::fmt::writer::EitherWriter::none"><code>OptionalWriter::none</code></a> when the predicate returns <code>false</code>.</p>
<p>This is returned by the <ahref="trait.MakeWriterExt.html#method.with_filter"title="method tracing_subscriber::fmt::writer::MakeWriterExt::with_filter"><code>MakeWriterExt::with_filter</code></a> method. See the
F: <aclass="trait"href="https://doc.rust-lang.org/1.77.1/core/ops/function/trait.Fn.html"title="trait core::ops::function::Fn">Fn</a>(&<aclass="struct"href="../../../tracing_core/metadata/struct.Metadata.html"title="struct tracing_core::metadata::Metadata">Metadata</a><'_>) -><aclass="primitive"href="https://doc.rust-lang.org/1.77.1/std/primitive.bool.html">bool</a>,</div></h4></section></summary><divclass="docblock"><p>Wraps <code>make</code> with the provided <code>filter</code>, returning a <ahref="../trait.MakeWriter.html"title="trait tracing_subscriber::fmt::MakeWriter"><code>MakeWriter</code></a> that
span or event’s <ahref="../../../tracing_core/metadata/struct.Metadata.html"title="struct tracing_core::metadata::Metadata"><code>Metadata</code></a>, and returns a <ahref="https://doc.rust-lang.org/1.77.1/std/io/util/fn.sink.html"title="fn std::io::util::sink"><code>sink</code></a> otherwise.</p>
<p>See <ahref="trait.MakeWriterExt.html#method.with_filter"title="method tracing_subscriber::fmt::writer::MakeWriterExt::with_filter"><code>MakeWriterExt::with_filter</code></a> for details.</p>
F: <aclass="trait"href="https://doc.rust-lang.org/1.77.1/core/ops/function/trait.Fn.html"title="trait core::ops::function::Fn">Fn</a>(&<aclass="struct"href="../../../tracing_core/metadata/struct.Metadata.html"title="struct tracing_core::metadata::Metadata">Metadata</a><'_>) -><aclass="primitive"href="https://doc.rust-lang.org/1.77.1/std/primitive.bool.html">bool</a>,</div></h3></section></summary><divclass="impl-items"><detailsclass="toggle"open><summary><sectionid="associatedtype.Writer"class="associatedtype trait-impl"><ahref="#associatedtype.Writer"class="anchor">§</a><h4class="code-header">type <ahref="../trait.MakeWriter.html#associatedtype.Writer"class="associatedtype">Writer</a> = <aclass="enum"href="enum.EitherWriter.html"title="enum tracing_subscriber::fmt::writer::EitherWriter">EitherWriter</a><<M as <aclass="trait"href="../trait.MakeWriter.html"title="trait tracing_subscriber::fmt::MakeWriter">MakeWriter</a><'a>>::<aclass="associatedtype"href="../trait.MakeWriter.html#associatedtype.Writer"title="type tracing_subscriber::fmt::MakeWriter::Writer">Writer</a>, <aclass="struct"href="https://doc.rust-lang.org/1.77.1/std/io/util/struct.Sink.html"title="struct std::io::util::Sink">Sink</a>></h4></section></summary><divclass='docblock'>The concrete <ahref="https://doc.rust-lang.org/1.77.1/std/io/trait.Write.html"title="trait std::io::Write"><code>io::Write</code></a> implementation returned by <ahref="../trait.MakeWriter.html#tymethod.make_writer"title="method tracing_subscriber::fmt::MakeWriter::make_writer"><code>make_writer</code></a>.</div></details><detailsclass="toggle method-toggle"open><summary><sectionid="method.make_writer"class="method trait-impl"><aclass="src rightside"href="../../../src/tracing_subscriber/fmt/writer.rs.html#1003-1005">source</a><ahref="#method.make_writer"class="anchor">§</a><h4class="code-header">fn <ahref="../trait.MakeWriter.html#tymethod.make_writer"class="fn">make_writer</a>(&'a self) -> Self::<aclass="associatedtype"href="../trait.MakeWriter.html#associatedtype.Writer"title="type tracing_subscriber::fmt::MakeWriter::Writer">Writer</a></h4></section></summary><divclass='docblock'>Returns an instance of <ahref="../trait.MakeWriter.html#associatedtype.Writer"title="associated type tracing_subscriber::fmt::MakeWriter::Writer"><code>Writer</code></a>. <ahref="../trait.MakeWriter.html#tymethod.make_writer">Read more</a></div></details><detailsclass="toggle method-toggle"open><summary><sectionid="method.make_writer_for"class="method trait-impl"><aclass="src rightside"href="../../../src/tracing_subscriber/fmt/writer.rs.html#1008-1014">source</a><ahref="#method.make_writer_for"class="anchor">§</a><h4class="code-header">fn <ahref="../trait.MakeWriter.html#method.make_writer_for"class="fn">make_writer_for</a>(&'a self, meta: &<aclass="struct"href="../../../tracing_core/metadata/struct.Metadata.html"title="struct tracing_core::metadata::Metadata">Metadata</a><'_>) -> Self::<aclass="associatedtype"href="../trait.MakeWriter.html#associatedtype.Writer"title="type tracing_subscriber::fmt::MakeWriter::Writer">Writer</a></h4></section></summary><divclass='docblock'>Returns a <ahref="../trait.MakeWriter.html#associatedtype.Writer"title="associated type tracing_subscriber::fmt::MakeWriter::Writer"><code>Writer</code></a> for writing data from the span or event described
by the provided <ahref="../../../tracing_core/metadata/struct.Metadata.html"title="struct tracing_core::metadata::Metadata"><code>Metadata</code></a>. <ahref="../trait.MakeWriter.html#method.make_writer_for">Read more</a></div></details></div></details><detailsclass="toggle implementors-toggle"open><summary><sectionid="impl-PartialEq-for-WithFilter%3CM,+F%3E"class="impl"><aclass="src rightside"href="../../../src/tracing_subscriber/fmt/writer.rs.html#608">source</a><ahref="#impl-PartialEq-for-WithFilter%3CM,+F%3E"class="anchor">§</a><h3class="code-header">impl<M: <aclass="trait"href="https://doc.rust-lang.org/1.77.1/core/cmp/trait.PartialEq.html"title="trait core::cmp::PartialEq">PartialEq</a>, F: <aclass="trait"href="https://doc.rust-lang.org/1.77.1/core/cmp/trait.PartialEq.html"title="trait core::cmp::PartialEq">PartialEq</a>><aclass="trait"href="https://doc.rust-lang.org/1.77.1/core/cmp/trait.PartialEq.html"title="trait core::cmp::PartialEq">PartialEq</a> for <aclass="struct"href="struct.WithFilter.html"title="struct tracing_subscriber::fmt::writer::WithFilter">WithFilter</a><M, F></h3></section></summary><divclass="impl-items"><detailsclass="toggle method-toggle"open><summary><sectionid="method.eq"class="method trait-impl"><aclass="src rightside"href="../../../src/tracing_subscriber/fmt/writer.rs.html#608">source</a><ahref="#method.eq"class="anchor">§</a><h4class="code-header">fn <ahref="https://doc.rust-lang.org/1.77.1/core/cmp/trait.PartialEq.html#tymethod.eq"class="fn">eq</a>(&self, other: &<aclass="struct"href="struct.WithFilter.html"title="struct tracing_subscriber::fmt::writer::WithFilter">WithFilter</a><M, F>) -><aclass="primitive"href="https://doc.rust-lang.org/1.77.1/std/primitive.bool.html">bool</a></h4></section></summary><divclass='docblock'>This method tests for <code>self</code> and <code>other</code> values to be equal, and is used
by <code>==</code>.</div></details><detailsclass="toggle method-toggle"open><summary><sectionid="method.ne"class="method trait-impl"><spanclass="rightside"><spanclass="since"title="Stable since Rust version 1.0.0">1.0.0</span> · <aclass="src"href="https://doc.rust-lang.org/1.77.1/src/core/cmp.rs.html#242">source</a></span><ahref="#method.ne"class="anchor">§</a><h4class="code-header">fn <ahref="https://doc.rust-lang.org/1.77.1/core/cmp/trait.PartialEq.html#method.ne"class="fn">ne</a>(&self, other: <aclass="primitive"href="https://doc.rust-lang.org/1.77.1/std/primitive.reference.html">&Rhs</a>) -><aclass="primitive"href="https://doc.rust-lang.org/1.77.1/std/primitive.bool.html">bool</a></h4></section></summary><divclass='docblock'>This method tests for <code>!=</code>. The default implementation is almost always
sufficient, and should not be overridden without very good reason.</div></details></div></details><sectionid="impl-Copy-for-WithFilter%3CM,+F%3E"class="impl"><aclass="src rightside"href="../../../src/tracing_subscriber/fmt/writer.rs.html#608">source</a><ahref="#impl-Copy-for-WithFilter%3CM,+F%3E"class="anchor">§</a><h3class="code-header">impl<M: <aclass="trait"href="https://doc.rust-lang.org/1.77.1/core/marker/trait.Copy.html"title="trait core::marker::Copy">Copy</a>, F: <aclass="trait"href="https://doc.rust-lang.org/1.77.1/core/marker/trait.Copy.html"title="trait core::marker::Copy">Copy</a>><aclass="trait"href="https://doc.rust-lang.org/1.77.1/core/marker/trait.Copy.html"title="trait core::marker::Copy">Copy</a> for <aclass="struct"href="struct.WithFilter.html"title="struct tracing_subscriber::fmt::writer::WithFilter">WithFilter</a><M, F></h3></section><sectionid="impl-Eq-for-WithFilter%3CM,+F%3E"class="impl"><aclass="src rightside"href="../../../src/tracing_subscriber/fmt/writer.rs.html#608">source</a><ahref="#impl-Eq-for-WithFilter%3CM,+F%3E"class="anchor">§</a><h3class="code-header">impl<M: <aclass="trait"href="https://doc.rust-lang.org/1.77.1/core/cmp/trait.Eq.html"title="trait core::cmp::Eq">Eq</a>, F: <aclass="trait"href="https://doc.rust-lang.org/1.77.1/core/cmp/trait.Eq.html"title="trait core::cmp::Eq">Eq</a>><aclass="trait"href="https://doc.rust-lang.org/1.77.1/core/cmp/trait.Eq.html"title="trait core::cmp::Eq">Eq</a> for <aclass="struct"href="struct.WithFilter.html"title="struct tracing_subscriber::fmt::writer::WithFilter">WithFilter</a><M, F></h3></section><sectionid="impl-StructuralPartialEq-for-WithFilter%3CM,+F%3E"class="impl"><aclass="src rightside"href="../../../src/tracing_subscriber/fmt/writer.rs.html#608">source</a><ahref="#impl-StructuralPartialEq-for-WithFilter%3CM,+F%3E"class="anchor">§</a><h3class="code-header">impl<M, F><aclass="trait"href="https://doc.rust-lang.org/1.77.1/core/marker/trait.StructuralPartialEq.html"title="trait core::marker::StructuralPartialEq">StructuralPartialEq</a> for <aclass="struct"href="struct.WithFilter.html"title="struct tracing_subscriber::fmt::writer::WithFilter">WithFilter</a><M, F></h3></section></div><h2id="synthetic-implementations"class="section-header">Auto Trait Implementations<ahref="#synthetic-implementations"class="anchor">§</a></h2><divid="synthetic-implementations-list"><sectionid="impl-RefUnwindSafe-for-WithFilter%3CM,+F%3E"class="impl"><ahref="#impl-RefUnwindSafe-for-WithFilter%3CM,+F%3E"class="anchor">§</a><h3class="code-header">impl<M, F><aclass="trait"href="https://doc.rust-lang.org/1.77.1/core/panic/unwind_safe/trait.RefUnwindSafe.html"title="trait core::panic::unwind_safe::RefUnwindSafe">RefUnwindSafe</a> for <aclass="struct"href="struct.WithFilter.html"title="struct tracing_subscriber::fmt::writer::WithFilter">WithFilter</a><M, F><divclass="where">where
</div></details></div></details><detailsclass="toggle implementors-toggle"><summary><sectionid="impl-Instrument-for-T"class="impl"><aclass="src rightside"href="../../../src/tracing/instrument.rs.html#325">source</a><ahref="#impl-Instrument-for-T"class="anchor">§</a><h3class="code-header">impl<T><aclass="trait"href="../../../tracing/instrument/trait.Instrument.html"title="trait tracing::instrument::Instrument">Instrument</a> for T</h3></section></summary><divclass="impl-items"><detailsclass="toggle method-toggle"open><summary><sectionid="method.instrument"class="method trait-impl"><aclass="src rightside"href="../../../src/tracing/instrument.rs.html#86">source</a><ahref="#method.instrument"class="anchor">§</a><h4class="code-header">fn <ahref="../../../tracing/instrument/trait.Instrument.html#method.instrument"class="fn">instrument</a>(self, span: <aclass="struct"href="../../../tracing/span/struct.Span.html"title="struct tracing::span::Span">Span</a>) -><aclass="struct"href="../../../tracing/instrument/struct.Instrumented.html"title="struct tracing::instrument::Instrumented">Instrumented</a><Self></h4></section></summary><divclass='docblock'>Instruments this type with the provided <ahref="../../../tracing/span/struct.Span.html"title="struct tracing::span::Span"><code>Span</code></a>, returning an
<code>Instrumented</code> wrapper. <ahref="../../../tracing/instrument/trait.Instrument.html#method.instrument">Read more</a></div></details><detailsclass="toggle method-toggle"open><summary><sectionid="method.in_current_span"class="method trait-impl"><aclass="src rightside"href="../../../src/tracing/instrument.rs.html#128">source</a><ahref="#method.in_current_span"class="anchor">§</a><h4class="code-header">fn <ahref="../../../tracing/instrument/trait.Instrument.html#method.in_current_span"class="fn">in_current_span</a>(self) -><aclass="struct"href="../../../tracing/instrument/struct.Instrumented.html"title="struct tracing::instrument::Instrumented">Instrumented</a><Self></h4></section></summary><divclass='docblock'>Instruments this type with the <ahref="../../../tracing/span/struct.Span.html#method.current"title="associated function tracing::span::Span::current">current</a><ahref="../../../tracing/span/struct.Span.html"title="struct tracing::span::Span"><code>Span</code></a>, returning an
<code><ahref="https://doc.rust-lang.org/1.77.1/core/convert/trait.From.html"title="trait core::convert::From">From</a><T> for U</code> chooses to do.</p>
Self: <aclass="trait"href="https://doc.rust-lang.org/1.77.1/core/marker/trait.Sized.html"title="trait core::marker::Sized">Sized</a>,</div></h4></section></summary><divclass='docblock'>Wraps <code>self</code> and returns a <ahref="../trait.MakeWriter.html"title="trait tracing_subscriber::fmt::MakeWriter"><code>MakeWriter</code></a> that will only write output
for events at or below the provided verbosity <ahref="../../../tracing_core/metadata/struct.Level.html"title="struct tracing_core::metadata::Level"><code>Level</code></a>. For instance,
<code>Level::TRACE</code> is considered to be _more verbose<code>than</code>Level::INFO`. <ahref="trait.MakeWriterExt.html#method.with_max_level">Read more</a></div></details><detailsclass="toggle method-toggle"open><summary><sectionid="method.with_min_level"class="method trait-impl"><aclass="src rightside"href="../../../src/tracing_subscriber/fmt/writer.rs.html#318-323">source</a><ahref="#method.with_min_level"class="anchor">§</a><h4class="code-header">fn <ahref="trait.MakeWriterExt.html#method.with_min_level"class="fn">with_min_level</a>(self, level: <aclass="struct"href="../../../tracing_core/metadata/struct.Level.html"title="struct tracing_core::metadata::Level">Level</a>) -><aclass="struct"href="struct.WithMinLevel.html"title="struct tracing_subscriber::fmt::writer::WithMinLevel">WithMinLevel</a><Self><divclass="where">where
Self: <aclass="trait"href="https://doc.rust-lang.org/1.77.1/core/marker/trait.Sized.html"title="trait core::marker::Sized">Sized</a>,</div></h4></section></summary><divclass='docblock'>Wraps <code>self</code> and returns a <ahref="../trait.MakeWriter.html"title="trait tracing_subscriber::fmt::MakeWriter"><code>MakeWriter</code></a> that will only write output
F: <aclass="trait"href="https://doc.rust-lang.org/1.77.1/core/ops/function/trait.Fn.html"title="trait core::ops::function::Fn">Fn</a>(&<aclass="struct"href="../../../tracing_core/metadata/struct.Metadata.html"title="struct tracing_core::metadata::Metadata">Metadata</a><'_>) -><aclass="primitive"href="https://doc.rust-lang.org/1.77.1/std/primitive.bool.html">bool</a>,</div></h4></section></summary><divclass='docblock'>Wraps <code>self</code> with a predicate that takes a span or event’s <ahref="../../../tracing_core/metadata/struct.Metadata.html"title="struct tracing_core::metadata::Metadata"><code>Metadata</code></a>
and returns a <code>bool</code>. The returned <ahref="../trait.MakeWriter.html"title="trait tracing_subscriber::fmt::MakeWriter"><code>MakeWriter</code></a>’s
<ahref="../trait.MakeWriter.html#method.make_writer_for"title="method tracing_subscriber::fmt::MakeWriter::make_writer_for"><code>MakeWriter::make_writer_for</code></a> method will check the predicate to
determine if a writer should be produced for a given span or event. <ahref="trait.MakeWriterExt.html#method.with_filter">Read more</a></div></details><detailsclass="toggle method-toggle"open><summary><sectionid="method.and"class="method trait-impl"><aclass="src rightside"href="../../../src/tracing_subscriber/fmt/writer.rs.html#452-458">source</a><ahref="#method.and"class="anchor">§</a><h4class="code-header">fn <ahref="trait.MakeWriterExt.html#method.and"class="fn">and</a><B>(self, other: B) -><aclass="struct"href="struct.Tee.html"title="struct tracing_subscriber::fmt::writer::Tee">Tee</a><Self, B><ahref="#"class="tooltip"data-notable-ty="Tee<Self, B>">ⓘ</a><divclass="where">where
B: <aclass="trait"href="../trait.MakeWriter.html"title="trait tracing_subscriber::fmt::MakeWriter">MakeWriter</a><'a> + <aclass="trait"href="https://doc.rust-lang.org/1.77.1/core/marker/trait.Sized.html"title="trait core::marker::Sized">Sized</a>,</div></h4></section></summary><divclass='docblock'>Combines <code>self</code> with another type implementing <ahref="../trait.MakeWriter.html"title="trait tracing_subscriber::fmt::MakeWriter"><code>MakeWriter</code></a>, returning
a new <ahref="../trait.MakeWriter.html"title="trait tracing_subscriber::fmt::MakeWriter"><code>MakeWriter</code></a> that produces <ahref="https://doc.rust-lang.org/1.77.1/std/io/trait.Write.html"title="trait std::io::Write">writers</a> that write to <em>both</em>
W: <aclass="trait"href="https://doc.rust-lang.org/1.77.1/std/io/trait.Write.html"title="trait std::io::Write">Write</a>,</div></h4></section></summary><divclass='docblock'>Combines <code>self</code> with another type implementing <ahref="../trait.MakeWriter.html"title="trait tracing_subscriber::fmt::MakeWriter"><code>MakeWriter</code></a>, returning
a new <ahref="../trait.MakeWriter.html"title="trait tracing_subscriber::fmt::MakeWriter"><code>MakeWriter</code></a> that calls <code>other</code>’s <ahref="../trait.MakeWriter.html#tymethod.make_writer"title="method tracing_subscriber::fmt::MakeWriter::make_writer"><code>make_writer</code></a> if <code>self</code>’s
<code>make_writer</code> returns <ahref="enum.EitherWriter.html#method.none"title="associated function tracing_subscriber::fmt::writer::EitherWriter::none"><code>OptionalWriter::none</code></a>. <ahref="trait.MakeWriterExt.html#method.or_else">Read more</a></div></details></div></details><detailsclass="toggle implementors-toggle"><summary><sectionid="impl-ToOwned-for-T"class="impl"><aclass="src rightside"href="https://doc.rust-lang.org/1.77.1/src/alloc/borrow.rs.html#83-85">source</a><ahref="#impl-ToOwned-for-T"class="anchor">§</a><h3class="code-header">impl<T><aclass="trait"href="https://doc.rust-lang.org/1.77.1/alloc/borrow/trait.ToOwned.html"title="trait alloc::borrow::ToOwned">ToOwned</a> for T<divclass="where">where
T: <aclass="trait"href="https://doc.rust-lang.org/1.77.1/core/clone/trait.Clone.html"title="trait core::clone::Clone">Clone</a>,</div></h3></section></summary><divclass="impl-items"><detailsclass="toggle"open><summary><sectionid="associatedtype.Owned"class="associatedtype trait-impl"><ahref="#associatedtype.Owned"class="anchor">§</a><h4class="code-header">type <ahref="https://doc.rust-lang.org/1.77.1/alloc/borrow/trait.ToOwned.html#associatedtype.Owned"class="associatedtype">Owned</a> = T</h4></section></summary><divclass='docblock'>The resulting type after obtaining ownership.</div></details><detailsclass="toggle method-toggle"open><summary><sectionid="method.to_owned"class="method trait-impl"><aclass="src rightside"href="https://doc.rust-lang.org/1.77.1/src/alloc/borrow.rs.html#88">source</a><ahref="#method.to_owned"class="anchor">§</a><h4class="code-header">fn <ahref="https://doc.rust-lang.org/1.77.1/alloc/borrow/trait.ToOwned.html#tymethod.to_owned"class="fn">to_owned</a>(&self) -> T</h4></section></summary><divclass='docblock'>Creates owned data from borrowed data, usually by cloning. <ahref="https://doc.rust-lang.org/1.77.1/alloc/borrow/trait.ToOwned.html#tymethod.to_owned">Read more</a></div></details><detailsclass="toggle method-toggle"open><summary><sectionid="method.clone_into"class="method trait-impl"><aclass="src rightside"href="https://doc.rust-lang.org/1.77.1/src/alloc/borrow.rs.html#92">source</a><ahref="#method.clone_into"class="anchor">§</a><h4class="code-header">fn <ahref="https://doc.rust-lang.org/1.77.1/alloc/borrow/trait.ToOwned.html#method.clone_into"class="fn">clone_into</a>(&self, target: <aclass="primitive"href="https://doc.rust-lang.org/1.77.1/std/primitive.reference.html">&mut T</a>)</h4></section></summary><divclass='docblock'>Uses borrowed data to replace owned data, usually by cloning. <ahref="https://doc.rust-lang.org/1.77.1/alloc/borrow/trait.ToOwned.html#method.clone_into">Read more</a></div></details></div></details><detailsclass="toggle implementors-toggle"><summary><sectionid="impl-TryFrom%3CU%3E-for-T"class="impl"><aclass="src rightside"href="https://doc.rust-lang.org/1.77.1/src/core/convert/mod.rs.html#804-806">source</a><ahref="#impl-TryFrom%3CU%3E-for-T"class="anchor">§</a><h3class="code-header">impl<T, U><aclass="trait"href="https://doc.rust-lang.org/1.77.1/core/convert/trait.TryFrom.html"title="trait core::convert::TryFrom">TryFrom</a><U> for T<divclass="where">where
U: <aclass="trait"href="https://doc.rust-lang.org/1.77.1/core/convert/trait.Into.html"title="trait core::convert::Into">Into</a><T>,</div></h3></section></summary><divclass="impl-items"><detailsclass="toggle"open><summary><sectionid="associatedtype.Error-1"class="associatedtype trait-impl"><ahref="#associatedtype.Error-1"class="anchor">§</a><h4class="code-header">type <ahref="https://doc.rust-lang.org/1.77.1/core/convert/trait.TryFrom.html#associatedtype.Error"class="associatedtype">Error</a> = <aclass="enum"href="https://doc.rust-lang.org/1.77.1/core/convert/enum.Infallible.html"title="enum core::convert::Infallible">Infallible</a></h4></section></summary><divclass='docblock'>The type returned in the event of a conversion error.</div></details><detailsclass="toggle method-toggle"open><summary><sectionid="method.try_from"class="method trait-impl"><aclass="src rightside"href="https://doc.rust-lang.org/1.77.1/src/core/convert/mod.rs.html#811">source</a><ahref="#method.try_from"class="anchor">§</a><h4class="code-header">fn <ahref="https://doc.rust-lang.org/1.77.1/core/convert/trait.TryFrom.html#tymethod.try_from"class="fn">try_from</a>(value: U) -><aclass="enum"href="https://doc.rust-lang.org/1.77.1/core/result/enum.Result.html"title="enum core::result::Result">Result</a><T, <T as <aclass="trait"href="https://doc.rust-lang.org/1.77.1/core/convert/trait.TryFrom.html"title="trait core::convert::TryFrom">TryFrom</a><U>>::<aclass="associatedtype"href="https://doc.rust-lang.org/1.77.1/core/convert/trait.TryFrom.html#associatedtype.Error"title="type core::convert::TryFrom::Error">Error</a>></h4></section></summary><divclass='docblock'>Performs the conversion.</div></details></div></details><detailsclass="toggle implementors-toggle"><summary><sectionid="impl-TryInto%3CU%3E-for-T"class="impl"><aclass="src rightside"href="https://doc.rust-lang.org/1.77.1/src/core/convert/mod.rs.html#789-791">source</a><ahref="#impl-TryInto%3CU%3E-for-T"class="anchor">§</a><h3class="code-header">impl<T, U><aclass="trait"href="https://doc.rust-lang.org/1.77.1/core/convert/trait.TryInto.html"title="trait core::convert::TryInto">TryInto</a><U> for T<divclass="where">where
U: <aclass="trait"href="https://doc.rust-lang.org/1.77.1/core/convert/trait.TryFrom.html"title="trait core::convert::TryFrom">TryFrom</a><T>,</div></h3></section></summary><divclass="impl-items"><detailsclass="toggle"open><summary><sectionid="associatedtype.Error"class="associatedtype trait-impl"><ahref="#associatedtype.Error"class="anchor">§</a><h4class="code-header">type <ahref="https://doc.rust-lang.org/1.77.1/core/convert/trait.TryInto.html#associatedtype.Error"class="associatedtype">Error</a> = <U as <aclass="trait"href="https://doc.rust-lang.org/1.77.1/core/convert/trait.TryFrom.html"title="trait core::convert::TryFrom">TryFrom</a><T>>::<aclass="associatedtype"href="https://doc.rust-lang.org/1.77.1/core/convert/trait.TryFrom.html#associatedtype.Error"title="type core::convert::TryFrom::Error">Error</a></h4></section></summary><divclass='docblock'>The type returned in the event of a conversion error.</div></details><detailsclass="toggle method-toggle"open><summary><sectionid="method.try_into"class="method trait-impl"><aclass="src rightside"href="https://doc.rust-lang.org/1.77.1/src/core/convert/mod.rs.html#796">source</a><ahref="#method.try_into"class="anchor">§</a><h4class="code-header">fn <ahref="https://doc.rust-lang.org/1.77.1/core/convert/trait.TryInto.html#tymethod.try_into"class="fn">try_into</a>(self) -><aclass="enum"href="https://doc.rust-lang.org/1.77.1/core/result/enum.Result.html"title="enum core::result::Result">Result</a><U, <U as <aclass="trait"href="https://doc.rust-lang.org/1.77.1/core/convert/trait.TryFrom.html"title="trait core::convert::TryFrom">TryFrom</a><T>>::<aclass="associatedtype"href="https://doc.rust-lang.org/1.77.1/core/convert/trait.TryFrom.html#associatedtype.Error"title="type core::convert::TryFrom::Error">Error</a>></h4></section></summary><divclass='docblock'>Performs the conversion.</div></details></div></details><detailsclass="toggle implementors-toggle"><summary><sectionid="impl-WithSubscriber-for-T"class="impl"><aclass="src rightside"href="../../../src/tracing/instrument.rs.html#393">source</a><ahref="#impl-WithSubscriber-for-T"class="anchor">§</a><h3class="code-header">impl<T><aclass="trait"href="../../../tracing/instrument/trait.WithSubscriber.html"title="trait tracing::instrument::WithSubscriber">WithSubscriber</a> for T</h3></section></summary><divclass="impl-items"><detailsclass="toggle method-toggle"open><summary><sectionid="method.with_subscriber"class="method trait-impl"><aclass="src rightside"href="../../../src/tracing/instrument.rs.html#176-178">source</a><ahref="#method.with_subscriber"class="anchor">§</a><h4class="code-header">fn <ahref="../../../tracing/instrument/trait.WithSubscriber.html#method.with_subscriber"class="fn">with_subscriber</a><S>(self, subscriber: S) -><aclass="struct"href="../../../tracing/instrument/struct.WithDispatch.html"title="struct tracing::instrument::WithDispatch">WithDispatch</a><Self><divclass="where">where
S: <aclass="trait"href="https://doc.rust-lang.org/1.77.1/core/convert/trait.Into.html"title="trait core::convert::Into">Into</a><<aclass="struct"href="../../../tracing_core/dispatcher/struct.Dispatch.html"title="struct tracing_core::dispatcher::Dispatch">Dispatch</a>>,</div></h4></section></summary><divclass='docblock'>Attaches the provided <ahref="../../../tracing_core/subscriber/trait.Subscriber.html"title="trait tracing_core::subscriber::Subscriber"><code>Subscriber</code></a> to this type, returning a
<ahref="../../../tracing/instrument/struct.WithDispatch.html"title="struct tracing::instrument::WithDispatch"><code>WithDispatch</code></a> wrapper. <ahref="../../../tracing/instrument/trait.WithSubscriber.html#method.with_subscriber">Read more</a></div></details><detailsclass="toggle method-toggle"open><summary><sectionid="method.with_current_subscriber"class="method trait-impl"><aclass="src rightside"href="../../../src/tracing/instrument.rs.html#228">source</a><ahref="#method.with_current_subscriber"class="anchor">§</a><h4class="code-header">fn <ahref="../../../tracing/instrument/trait.WithSubscriber.html#method.with_current_subscriber"class="fn">with_current_subscriber</a>(self) -><aclass="struct"href="../../../tracing/instrument/struct.WithDispatch.html"title="struct tracing::instrument::WithDispatch">WithDispatch</a><Self></h4></section></summary><divclass='docblock'>Attaches the current <ahref="../../../tracing/dispatcher/index.html#setting-the-default-subscriber"title="mod tracing::dispatcher">default</a><ahref="../../../tracing_core/subscriber/trait.Subscriber.html"title="trait tracing_core::subscriber::Subscriber"><code>Subscriber</code></a> to this type, returning a