<!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="Use cookies for request identity storage."><metaname="keywords"content="rust, rustlang, rust-lang, CookieIdentityPolicy"><title>CookieIdentityPolicy in actix_identity - Rust</title><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../SourceSerif4-Regular.ttf.woff2"><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../FiraSans-Regular.woff2"><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../FiraSans-Medium.woff2"><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../SourceCodePro-Regular.ttf.woff2"><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../SourceSerif4-Bold.ttf.woff2"><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../SourceCodePro-Semibold.ttf.woff2"><linkrel="stylesheet"type="text/css"href="../normalize.css"><linkrel="stylesheet"type="text/css"href="../rustdoc.css"id="mainThemeStyle"><linkrel="stylesheet"type="text/css"href="../ayu.css"disabled><linkrel="stylesheet"type="text/css"href="../dark.css"disabled><linkrel="stylesheet"type="text/css"href="../light.css"id="themeStyle"><scriptid="default-settings"></script><scriptsrc="../storage.js"></script><scriptsrc="../crates.js"></script><scriptdefersrc="../main.js"></script>
<noscript><linkrel="stylesheet"href="../noscript.css"></noscript><linkrel="alternate icon"type="image/png"href="../favicon-16x16.png"><linkrel="alternate icon"type="image/png"href="../favicon-32x32.png"><linkrel="icon"type="image/svg+xml"href="../favicon.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="sidebar"><divclass="sidebar-menu"role="button">☰</div><aclass="sidebar-logo"href='../actix_identity/index.html'><divclass='logo-container rust-logo'><imgsrc='../rust-logo.png'alt='logo'></div></a><h2class="location">Struct CookieIdentityPolicy</h2><divclass="sidebar-elems"><divclass="block items"><h3class="sidebar-title"><ahref="#implementations">Methods</a></h3><divclass="sidebar-links"><ahref="#method.domain">domain</a><ahref="#method.http_only">http_only</a><ahref="#method.login_deadline">login_deadline</a><ahref="#method.max_age">max_age</a><ahref="#method.max_age_secs">max_age_secs</a><ahref="#method.name">name</a><ahref="#method.new">new</a><ahref="#method.path">path</a><ahref="#method.same_site">same_site</a><ahref="#method.secure">secure</a><ahref="#method.visit_deadline">visit_deadline</a></div><h3class="sidebar-title"><ahref="#trait-implementations">Trait Implementations</a></h3><divclass="sidebar-links"><ahref="#impl-IdentityPolicy">IdentityPolicy</a></div><h3class="sidebar-title"><ahref="#synthetic-implementations">Auto Trait Implementations</a></h3><divclass="sidebar-links"><ahref="#impl-RefUnwindSafe">RefUnwindSafe</a><ahref="#impl-Send">!Send</a><ahref="#impl-Sync">!Sync</a><ahref="#impl-Unpin">Unpin</a><ahref="#impl-UnwindSafe">UnwindSafe</a></div><h3class="sidebar-title"><ahref="#blanket-implementations">Blanket Implementations</a></h3><divclass="sidebar-links"><ahref="#impl-Any">Any</a><ahref="#impl-Borrow%3CT%3E">Borrow<T></a><ahref="#impl-BorrowMut%3CT%3E">BorrowMut<T></a><ahref="#impl-From%3CT%3E">From<T></a><ahref="#impl-Instrument">Instrument</a><ahref="#impl-Into%3CU%3E">Into<U></a><ahref="#impl-Same%3CT%3E">Same<T></a><ahref="#impl-TryFrom%3CU%3E">TryFrom<U></a><ahref="#impl-TryInto%3CU%3E">TryInto<U></a><ahref="#impl-VZip%3CV%3E">VZip<V></a><ahref="#impl-WithSubscriber">WithSubscriber</a></div></div><h2class="location">Other items in<br><ahref="index.html">actix_identity</a></h2><divid="sidebar-vars"data-name="CookieIdentityPolicy"data-ty="struct"data-relpath=""></div><scriptdefersrc="sidebar-items.js"></script></div></nav><main><divclass="width-limiter"><divclass="sub-container"><aclass="sub-logo-container rust-logo"href='../actix_identity/index.html'><imgsrc='../rust-logo.png'alt='logo'></a><navclass="sub"><divclass="theme-picker"><buttonid="theme-picker"aria-label="Pick another theme!"aria-haspopup="menu"title="themes"><imgwidth="18"height="18"alt="Pick another theme!"src="../brush.svg"></button><divid="theme-choices"role="menu"></div></div><formclass="search-form"><divclass="search-container"><div><selectid="crate-search"><optionvalue="All crates">All crates</option></select><inputclass="search-input"name="search"autocomplete="off"spellcheck="false"placeholder="Click or press ‘S’ to search, ‘?’ for more options…"type="search"></div><buttontype="button"id="help-button"title="help">?</button><aid="settings-menu"href="../settings.html"title="settings"><imgwidth="18"height="18"alt="Change settings"src="../wheel.svg"></a></div></form></nav></div><sectionid="main-content"class="content"><h1class="fqn"><spanclass="in-band">Struct <ahref="index.html">actix_identity</a>::<wbr><aclass="struct"href="#">CookieIdentityPolicy</a><buttonid="copy-path"onclick="copy_path(this)"title="Copy item path to clipboard"><imgsrc="../clipboard.svg"width="19"height="18"alt="Copy item path"></button></span><spanclass="out-of-band"><spanid="render-detail"><aid="toggle-all-docs"href="javascript:void(
</div></details><detailsclass="rustdoc-toggle method-toggle"open><summary><divid="method.name"class="method has-srclink"><divclass="rightside"><aclass="srclink"href="../src/actix_identity/cookie.rs.html#223-226"title="goto source code">[src]</a></div><ahref="#method.name"class="anchor"></a><h4class="code-header">pub fn <ahref="#method.name"class="fnname">name</a>(self, value: impl <aclass="trait"href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html"title="trait core::convert::Into">Into</a><<aclass="struct"href="https://doc.rust-lang.org/nightly/alloc/string/struct.String.html"title="struct alloc::string::String">String</a>>) -><aclass="struct"href="struct.CookieIdentityPolicy.html"title="struct actix_identity::CookieIdentityPolicy">CookieIdentityPolicy</a></h4></div></summary><divclass="docblock"><p>Sets the name of issued cookies.</p>
</div></details><detailsclass="rustdoc-toggle method-toggle"open><summary><divid="method.path"class="method has-srclink"><divclass="rightside"><aclass="srclink"href="../src/actix_identity/cookie.rs.html#229-232"title="goto source code">[src]</a></div><ahref="#method.path"class="anchor"></a><h4class="code-header">pub fn <ahref="#method.path"class="fnname">path</a>(self, value: impl <aclass="trait"href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html"title="trait core::convert::Into">Into</a><<aclass="struct"href="https://doc.rust-lang.org/nightly/alloc/string/struct.String.html"title="struct alloc::string::String">String</a>>) -><aclass="struct"href="struct.CookieIdentityPolicy.html"title="struct actix_identity::CookieIdentityPolicy">CookieIdentityPolicy</a></h4></div></summary><divclass="docblock"><p>Sets the <code>Path</code> attribute of issued cookies.</p>
</div></details><detailsclass="rustdoc-toggle method-toggle"open><summary><divid="method.domain"class="method has-srclink"><divclass="rightside"><aclass="srclink"href="../src/actix_identity/cookie.rs.html#235-238"title="goto source code">[src]</a></div><ahref="#method.domain"class="anchor"></a><h4class="code-header">pub fn <ahref="#method.domain"class="fnname">domain</a>(self, value: impl <aclass="trait"href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html"title="trait core::convert::Into">Into</a><<aclass="struct"href="https://doc.rust-lang.org/nightly/alloc/string/struct.String.html"title="struct alloc::string::String">String</a>>) -><aclass="struct"href="struct.CookieIdentityPolicy.html"title="struct actix_identity::CookieIdentityPolicy">CookieIdentityPolicy</a></h4></div></summary><divclass="docblock"><p>Sets the <code>Domain</code> attribute of issued cookies.</p>
</div></details><detailsclass="rustdoc-toggle method-toggle"open><summary><divid="method.secure"class="method has-srclink"><divclass="rightside"><aclass="srclink"href="../src/actix_identity/cookie.rs.html#241-244"title="goto source code">[src]</a></div><ahref="#method.secure"class="anchor"></a><h4class="code-header">pub fn <ahref="#method.secure"class="fnname">secure</a>(self, value: <aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a>) -><aclass="struct"href="struct.CookieIdentityPolicy.html"title="struct actix_identity::CookieIdentityPolicy">CookieIdentityPolicy</a></h4></div></summary><divclass="docblock"><p>Sets the <code>Secure</code> attribute of issued cookies.</p>
</div></details><detailsclass="rustdoc-toggle method-toggle"open><summary><divid="method.max_age"class="method has-srclink"><divclass="rightside"><aclass="srclink"href="../src/actix_identity/cookie.rs.html#247-250"title="goto source code">[src]</a></div><ahref="#method.max_age"class="anchor"></a><h4class="code-header">pub fn <ahref="#method.max_age"class="fnname">max_age</a>(self, value: Duration) -><aclass="struct"href="struct.CookieIdentityPolicy.html"title="struct actix_identity::CookieIdentityPolicy">CookieIdentityPolicy</a></h4></div></summary><divclass="docblock"><p>Sets the <code>Max-Age</code> attribute of issued cookies.</p>
</div></details><detailsclass="rustdoc-toggle method-toggle"open><summary><divid="method.max_age_secs"class="method has-srclink"><divclass="rightside"><aclass="srclink"href="../src/actix_identity/cookie.rs.html#253-255"title="goto source code">[src]</a></div><ahref="#method.max_age_secs"class="anchor"></a><h4class="code-header">pub fn <ahref="#method.max_age_secs"class="fnname">max_age_secs</a>(self, seconds: <aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.i64.html">i64</a>) -><aclass="struct"href="struct.CookieIdentityPolicy.html"title="struct actix_identity::CookieIdentityPolicy">CookieIdentityPolicy</a></h4></div></summary><divclass="docblock"><p>Sets the <code>Max-Age</code> attribute of issued cookies with given number of seconds.</p>
</div></details><detailsclass="rustdoc-toggle method-toggle"open><summary><divid="method.http_only"class="method has-srclink"><divclass="rightside"><aclass="srclink"href="../src/actix_identity/cookie.rs.html#260-263"title="goto source code">[src]</a></div><ahref="#method.http_only"class="anchor"></a><h4class="code-header">pub fn <ahref="#method.http_only"class="fnname">http_only</a>(self, http_only: <aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a>) -> Self</h4></div></summary><divclass="docblock"><p>Sets the <code>HttpOnly</code> attribute of issued cookies.</p>
</div></details><detailsclass="rustdoc-toggle method-toggle"open><summary><divid="method.visit_deadline"class="method has-srclink"><divclass="rightside"><aclass="srclink"href="../src/actix_identity/cookie.rs.html#280-283"title="goto source code">[src]</a></div><ahref="#method.visit_deadline"class="anchor"></a><h4class="code-header">pub fn <ahref="#method.visit_deadline"class="fnname">visit_deadline</a>(self, deadline: Duration) -><aclass="struct"href="struct.CookieIdentityPolicy.html"title="struct actix_identity::CookieIdentityPolicy">CookieIdentityPolicy</a></h4></div></summary><divclass="docblock"><p>Accepts only users who have visited within given deadline.</p>
</div></details><detailsclass="rustdoc-toggle method-toggle"open><summary><divid="method.login_deadline"class="method has-srclink"><divclass="rightside"><aclass="srclink"href="../src/actix_identity/cookie.rs.html#293-296"title="goto source code">[src]</a></div><ahref="#method.login_deadline"class="anchor"></a><h4class="code-header">pub fn <ahref="#method.login_deadline"class="fnname">login_deadline</a>(self, deadline: Duration) -><aclass="struct"href="struct.CookieIdentityPolicy.html"title="struct actix_identity::CookieIdentityPolicy">CookieIdentityPolicy</a></h4></div></summary><divclass="docblock"><p>Accepts only users who authenticated within the given deadline.</p>
</div></details></div></details><h2id="trait-implementations"class="small-section-header">Trait Implementations<ahref="#trait-implementations"class="anchor"></a></h2><divid="trait-implementations-list"><detailsclass="rustdoc-toggle implementors-toggle"open><summary><divid="impl-IdentityPolicy"class="impl has-srclink"><divclass="rightside"><aclass="srclink"href="../src/actix_identity/cookie.rs.html#303-367"title="goto source code">[src]</a></div><ahref="#impl-IdentityPolicy"class="anchor"></a><h3class="code-header in-band">impl <aclass="trait"href="trait.IdentityPolicy.html"title="trait actix_identity::IdentityPolicy">IdentityPolicy</a> for <aclass="struct"href="struct.CookieIdentityPolicy.html"title="struct actix_identity::CookieIdentityPolicy">CookieIdentityPolicy</a></h3></div></summary><divclass="impl-items"><detailsclass="rustdoc-toggle"open><summary><divid="associatedtype.Future"class="type trait-impl has-srclink"><ahref="#associatedtype.Future"class="anchor"></a><h4class="code-header">type <ahref="trait.IdentityPolicy.html#associatedtype.Future"class="type">Future</a> = Ready<Result<<aclass="enum"href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html"title="enum core::option::Option">Option</a><<aclass="struct"href="https://doc.rust-lang.org/nightly/alloc/string/struct.String.html"title="struct alloc::string::String">String</a>>, Error>></h4></div></summary><divclass='docblock'><p>The return type of the middleware</p>
</div></details><detailsclass="rustdoc-toggle"open><summary><divid="associatedtype.ResponseFuture"class="type trait-impl has-srclink"><ahref="#associatedtype.ResponseFuture"class="anchor"></a><h4class="code-header">type <ahref="trait.IdentityPolicy.html#associatedtype.ResponseFuture"class="type">ResponseFuture</a> = Ready<Result<<aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Error>></h4></div></summary><divclass='docblock'><p>The return type of the middleware</p>
</div></details><detailsclass="rustdoc-toggle method-toggle"open><summary><divid="method.from_request"class="method trait-impl has-srclink"><divclass="rightside"><aclass="srclink"href="../src/actix_identity/cookie.rs.html#307-322"title="goto source code">[src]</a></div><ahref="#method.from_request"class="anchor"></a><h4class="code-header">fn <ahref="trait.IdentityPolicy.html#tymethod.from_request"class="fnname">from_request</a>(&self, req: &mut ServiceRequest) -> Self::<aclass="type"href="trait.IdentityPolicy.html#associatedtype.Future"title="type actix_identity::IdentityPolicy::Future">Future</a></h4></div></summary><divclass='docblock'><p>Parse the session from request and load data from a service identity.</p>
</div></details></div></details><detailsclass="rustdoc-toggle implementors-toggle"open><summary><divid="impl-Instrument"class="impl has-srclink"><divclass="rightside"><aclass="srclink"href="https://docs.rs/tracing/0.1.29/src/tracing/instrument.rs.html#276"title="goto source code">[src]</a></div><ahref="#impl-Instrument"class="anchor"></a><h3class="code-header in-band">impl<T><aclass="trait"href="https://docs.rs/tracing/0.1.29/tracing/instrument/trait.Instrument.html"title="trait tracing::instrument::Instrument">Instrument</a> for T</h3></div></summary><divclass="impl-items"><detailsclass="rustdoc-toggle method-toggle"open><summary><divid="method.instrument"class="method trait-impl has-srclink"><divclass="rightside"><aclass="srclink"href="https://docs.rs/tracing/0.1.29/src/tracing/instrument.rs.html#82"title="goto source code">[src]</a></div><ahref="#method.instrument"class="anchor"></a><h4class="code-header">fn <ahref="https://docs.rs/tracing/0.1.29/tracing/instrument/trait.Instrument.html#method.instrument"class="fnname">instrument</a>(self, span: <aclass="struct"href="https://docs.rs/tracing/0.1.29/tracing/span/struct.Span.html"title="struct tracing::span::Span">Span</a>) -><aclass="struct"href="https://docs.rs/tracing/0.1.29/tracing/instrument/struct.Instrumented.html"title="struct tracing::instrument::Instrumented">Instrumented</a><Self></h4></div></summary><divclass='docblock'><p>Instruments this type with the provided <ahref="https://docs.rs/tracing/0.1.29/tracing/span/struct.Span.html"title="Span"><code>Span</code></a>, returning an
</div></details><detailsclass="rustdoc-toggle method-toggle"open><summary><divid="method.in_current_span"class="method trait-impl has-srclink"><divclass="rightside"><aclass="srclink"href="https://docs.rs/tracing/0.1.29/src/tracing/instrument.rs.html#121"title="goto source code">[src]</a></div><ahref="#method.in_current_span"class="anchor"></a><h4class="code-header">fn <ahref="https://docs.rs/tracing/0.1.29/tracing/instrument/trait.Instrument.html#method.in_current_span"class="fnname">in_current_span</a>(self) -><aclass="struct"href="https://docs.rs/tracing/0.1.29/tracing/instrument/struct.Instrumented.html"title="struct tracing::instrument::Instrumented">Instrumented</a><Self></h4></div></summary><divclass='docblock'><p>Instruments this type with the <ahref="https://docs.rs/tracing/0.1.29/tracing/span/struct.Span.html#method.current">current</a><ahref="https://docs.rs/tracing/0.1.29/tracing/span/struct.Span.html"><code>Span</code></a>, returning an
</div></details></div></details><detailsclass="rustdoc-toggle implementors-toggle"open><summary><divid="impl-TryFrom%3CU%3E"class="impl has-srclink"><divclass="rightside"><aclass="srclink"href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#587-596"title="goto source code">[src]</a></div><ahref="#impl-TryFrom%3CU%3E"class="anchor"></a><h3class="code-header in-band">impl<T, U><aclass="trait"href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html"title="trait core::convert::TryFrom">TryFrom</a><U> for T <spanclass="where fmt-newline">where<br> U: <aclass="trait"href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html"title="trait core::convert::Into">Into</a><T>, </span></h3></div></summary><divclass="impl-items"><detailsclass="rustdoc-toggle"open><summary><divid="associatedtype.Error"class="type trait-impl has-srclink"><ahref="#associatedtype.Error"class="anchor"></a><h4class="code-header">type <ahref="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#associatedtype.Error"class="type">Error</a> = <aclass="enum"href="https://doc.rust-lang.org/nightly/core/convert/enum.Infallible.html"title="enum core::convert::Infallible">Infallible</a></h4></div></summary><divclass='docblock'><p>The type returned in the event of a conversion error.</p>
</div></details><detailsclass="rustdoc-toggle method-toggle"open><summary><divid="method.try_from"class="method trait-impl has-srclink"><divclass="rightside"><aclass="srclink"href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#593"title="goto source code">[src]</a></div><ahref="#method.try_from"class="anchor"></a><h4class="code-header">pub fn <ahref="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#tymethod.try_from"class="fnname">try_from</a>(value: U) -><aclass="enum"href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html"title="enum core::result::Result">Result</a><T, <T as <aclass="trait"href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html"title="trait core::convert::TryFrom">TryFrom</a><U>>::<aclass="type"href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#associatedtype.Error"title="type core::convert::TryFrom::Error">Error</a>></h4></div></summary><divclass='docblock'><p>Performs the conversion.</p>
</div></details></div></details><detailsclass="rustdoc-toggle implementors-toggle"open><summary><divid="impl-TryInto%3CU%3E"class="impl has-srclink"><divclass="rightside"><aclass="srclink"href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#573-582"title="goto source code">[src]</a></div><ahref="#impl-TryInto%3CU%3E"class="anchor"></a><h3class="code-header in-band">impl<T, U><aclass="trait"href="https://doc.rust-lang.org/nightly/core/convert/trait.TryInto.html"title="trait core::convert::TryInto">TryInto</a><U> for T <spanclass="where fmt-newline">where<br> U: <aclass="trait"href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html"title="trait core::convert::TryFrom">TryFrom</a><T>, </span></h3></div></summary><divclass="impl-items"><detailsclass="rustdoc-toggle"open><summary><divid="associatedtype.Error-1"class="type trait-impl has-srclink"><ahref="#associatedtype.Error-1"class="anchor"></a><h4class="code-header">type <ahref="https://doc.rust-lang.org/nightly/core/convert/trait.TryInto.html#associatedtype.Error"class="type">Error</a> = <U as <aclass="trait"href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html"title="trait core::convert::TryFrom">TryFrom</a><T>>::<aclass="type"href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#associatedtype.Error"title="type core::convert::TryFrom::Error">Error</a></h4></div></summary><divclass='docblock'><p>The type returned in the event of a conversion error.</p>
</div></details><detailsclass="rustdoc-toggle method-toggle"open><summary><divid="method.try_into"class="method trait-impl has-srclink"><divclass="rightside"><aclass="srclink"href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#579"title="goto source code">[src]</a></div><ahref="#method.try_into"class="anchor"></a><h4class="code-header">pub fn <ahref="https://doc.rust-lang.org/nightly/core/convert/trait.TryInto.html#tymethod.try_into"class="fnname">try_into</a>(self) -><aclass="enum"href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html"title="enum core::result::Result">Result</a><U, <U as <aclass="trait"href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html"title="trait core::convert::TryFrom">TryFrom</a><T>>::<aclass="type"href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#associatedtype.Error"title="type core::convert::TryFrom::Error">Error</a>></h4></div></summary><divclass='docblock'><p>Performs the conversion.</p>
</div></details><detailsclass="rustdoc-toggle method-toggle"open><summary><divid="method.with_current_subscriber"class="method trait-impl has-srclink"><divclass="rightside"><aclass="srclink"href="https://docs.rs/tracing/0.1.29/src/tracing/instrument.rs.html#221"title="goto source code">[src]</a></div><ahref="#method.with_current_subscriber"class="anchor"></a><h4class="code-header">fn <ahref="https://docs.rs/tracing/0.1.29/tracing/instrument/trait.WithSubscriber.html#method.with_current_subscriber"class="fnname">with_current_subscriber</a>(self) -><aclass="struct"href="https://docs.rs/tracing/0.1.29/tracing/instrument/struct.WithDispatch.html"title="struct tracing::instrument::WithDispatch">WithDispatch</a><Self></h4></div></summary><divclass='docblock'><p>Attaches the current <ahref="https://docs.rs/tracing/0.1.29/tracing/dispatcher/index.html#setting-the-default-subscriber">default</a><ahref="https://docs.rs/tracing-core/0.1.21/tracing_core/subscriber/trait.Subscriber.html"><code>Subscriber</code></a> to this type, returning a