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<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Indicates whether a value is available or if the current task has been scheduled to receive a wakeup instead."><title>Poll in futures::task - Rust</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/SourceSerif4-Regular-46f98efaafac5295.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/FiraSans-Regular-018c141bf0843ffd.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/FiraSans-Medium-8f9a781e4970d388.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/SourceCodePro-Regular-562dcc5011b6de7d.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin 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type="image/png" href="../../static.files/favicon-32x32-422f7d1d52889060.png"><link rel="icon" type="image/svg+xml" href="../../static.files/favicon-2c020d218678b618.svg"></head><body class="rustdoc enum"><!--[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">&#9776;</button></nav><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../../futures/index.html">futures</a><span class="version">0.3.28</span></h2></div><h2 class="location"><a href="#">Poll</a></h2><div class="sidebar-elems"><section><h3><a href="#variants">Variants</a></h3><ul class="block variant"><li><a href="#variant.Pending">Pending</a></li><li><a href="#variant.Ready">Ready</a></li></ul><h3><a href="#implementations">Associated Constants</a></h3><ul class="block associatedconstant"><li><a href="#associatedconstant.FINISHED">FINISHED</a></li><li><a href="#associatedconstant.PENDING">PENDING</a></li></ul><h3><a href="#implementations">Methods</a></h3><ul class="block method"><li><a href="#method.async_gen_ready">async_gen_ready</a></li><li><a href="#method.is_pending">is_pending</a></li><li><a href="#method.is_ready">is_ready</a></li><li><a href="#method.map">map</a></li><li><a href="#method.map_err">map_err</a></li><li><a href="#method.map_err-1">map_err</a></li><li><a href="#method.map_ok">map_ok</a></li><li><a href="#method.map_ok-1">map_ok</a></li></ul><h3><a href="#trait-implementations">Trait Implementations</a></h3><ul class="block trait-implementation"><li><a href="#impl-Clone-for-Poll%3CT%3E">Clone</a></li><li><a href="#impl-Copy-for-Poll%3CT%3E">Copy</a></li><li><a href="#impl-Debug-for-Poll%3CT%3E">Debug</a></li><li><a href="#impl-Eq-for-Poll%3CT%3E">Eq</a></li><li><a href="#impl-From%3CT%3E-for-Poll%3CT%3E">From&lt;T&gt;</a></li><li><a href="#impl-FromResidual%3CResult%3CInfallible,+E%3E%3E-for-Poll%3COption%3CResult%3CT,+F%3E%3E%3E">FromResidual&lt;Result&lt;Infallible, E&gt;&gt;</a></li><li><a href="#impl-FromResidual%3CResult%3CInfallible,+E%3E%3E-for-Poll%3CResult%3CT,+F%3E%3E">FromResidual&lt;Result&lt;Infallible, E&gt;&gt;</a></li><li><a href="#impl-Hash-for-Poll%3CT%3E">Hash</a></li><li><a href="#impl-Ord-for-Poll%3CT%3E">Ord</a></li><li><a href="#impl-PartialEq-for-Poll%3CT%3E">PartialEq</a></li><li><a href="#impl-PartialOrd-for-Poll%3CT%3E">PartialOrd</a></li><li><a href="#impl-StructuralEq-for-Poll%3CT%3E">StructuralEq</a></li><li><a href="#impl-StructuralPartialEq-for-Poll%3CT%3E">StructuralPartialEq</a></li><li><a href="#impl-Try-for-Poll%3COption%3CResult%3CT,+E%3E%3E%3E">Try</a></li><li><a href="#impl-Try-for-Poll%3CResult%3CT,+E%3E%3E">Try</a></li></ul><h3><a href="#synthetic-implementations">Auto Trait Implementations</a></h3><ul class="block synthetic-implementation"><li><a href="#impl-RefUnwindSafe-for-Poll%3CT%3E">RefUnwindSafe</a></li><li><a href="#impl-Send-for-Poll%3CT%3E">Send</a></li><li><a href="#impl-Sync-for-Poll%3CT%3E">Sync</a></li><li><a href="#impl-Unpin-for-Poll%3CT%3E">Unpin</a></li><li><a href="#impl-UnwindSafe-for-Poll%3CT%3E">UnwindSafe</a></li></ul><h3><a href="#blanket-implementations">Blanket Implementations</a></h3><ul class="block blanket-implementation"><li><a href="#impl-Any-for-T">Any</a></li><li><a href="#impl-Borrow%3CT%3E-for-T">Borrow&lt;T&gt;</a></li><li><a href="#impl-BorrowMut%3CT%3E-for-T">BorrowMut&lt;T&gt;</a></li><li><a href="#impl-From%3C!%3E-for-T">From&lt;!&gt;</a></li><li><a href="#impl-From%3CT%3E-for-T">From&lt;T&gt;</a></li><li><a href="#impl-Into%3CU%3E-for-T">Into&lt;U&gt;</a></li><li><a href="#impl-ToOwned-for-T">ToOwned</a></li><li><a href="#impl-TryFrom%3CU%3E-for-T">TryFrom&lt;U&gt;</a></li><li><a href="#impl-TryInto%3CU%3E-for-T">TryInto&lt;U&gt;</a></li></ul></section><h2><a href="index.html">In futures::task</a></h2></div></nav><div class="sidebar-resizer"></div>
<main><div class="width-limiter"><nav class="sub"><form class="search-form"><span></span><div id="sidebar-button" tabindex="-1"><a href="../../futures/all.html" title="show sidebar"></a></div><input class="search-input" name="search" aria-label="Run search in the documentation" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><div id="help-button" tabindex="-1"><a href="../../help.html" title="help">?</a></div><div id="settings-menu" tabindex="-1"><a href="../../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../../static.files/wheel-7b819b6101059cd0.svg"></a></div></form></nav><section id="main-content" class="content"><div class="main-heading"><h1>Enum <a href="../index.html">futures</a>::<wbr><a href="index.html">task</a>::<wbr><a class="enum" href="#">Poll</a><button id="copy-path" title="Copy item path to clipboard"><img src="../../static.files/clipboard-7571035ce49a181d.svg" width="19" height="18" alt="Copy item path"></button></h1><span class="out-of-band"><span class="since" title="Stable since Rust version 1.36.0">1.36.0</span> · <a class="src" href="https://doc.rust-lang.org/1.76.0/src/core/task/poll.rs.html#12">source</a> · <button id="toggle-all-docs" title="collapse all docs">[<span>&#x2212;</span>]</button></span></div><pre class="rust item-decl"><code>pub enum Poll&lt;T&gt; {
Ready(T),
Pending,
}</code></pre><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>Indicates whether a value is available or if the current task has been
scheduled to receive a wakeup instead.</p>
</div></details><h2 id="variants" class="variants section-header">Variants<a href="#variants" class="anchor">§</a></h2><div class="variants"><section id="variant.Ready" class="variant"><a href="#variant.Ready" class="anchor">§</a><h3 class="code-header">Ready(T)</h3></section><div class="docblock"><p>Represents that a value is immediately ready.</p>
</div><section id="variant.Pending" class="variant"><a href="#variant.Pending" class="anchor">§</a><h3 class="code-header">Pending</h3></section><div class="docblock"><p>Represents that a value is not ready yet.</p>
<p>When a function returns <code>Pending</code>, the function <em>must</em> also
ensure that the current task is scheduled to be awoken when
progress can be made.</p>
</div></div><h2 id="implementations" class="section-header">Implementations<a href="#implementations" class="anchor">§</a></h2><div id="implementations-list"><details class="toggle implementors-toggle" open><summary><section id="impl-Poll%3COption%3CT%3E%3E" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/async_iter/async_iter.rs.html#115">source</a><a href="#impl-Poll%3COption%3CT%3E%3E" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; <a class="enum" href="enum.Poll.html" title="enum futures::task::Poll">Poll</a>&lt;<a class="enum" href="https://doc.rust-lang.org/1.76.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a>&lt;T&gt;&gt;</h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.async_gen_ready" class="method"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/async_iter/async_iter.rs.html#120">source</a><h4 class="code-header">pub fn <a href="#method.async_gen_ready" class="fn">async_gen_ready</a>(t: T) -&gt; <a class="enum" href="enum.Poll.html" title="enum futures::task::Poll">Poll</a>&lt;<a class="enum" href="https://doc.rust-lang.org/1.76.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a>&lt;T&gt;&gt;</h4></section><span class="item-info"><div class="stab unstable"><span class="emoji">🔬</span><span>This is a nightly-only experimental API. (<code>async_gen_internals</code>)</span></div></span></summary><div class="docblock"><p>A helper function for internal desugaring – produces <code>Ready(Some(t))</code>,
which corresponds to the async iterator yielding a value.</p>
</div></details><details class="toggle" open><summary><section id="associatedconstant.PENDING" class="associatedconstant"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/async_iter/async_iter.rs.html#129">source</a><h4 class="code-header">pub const <a href="#associatedconstant.PENDING" class="constant">PENDING</a>: <a class="enum" href="enum.Poll.html" title="enum futures::task::Poll">Poll</a>&lt;<a class="enum" href="https://doc.rust-lang.org/1.76.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a>&lt;T&gt;&gt; = Poll::Pending</h4></section><span class="item-info"><div class="stab unstable"><span class="emoji">🔬</span><span>This is a nightly-only experimental API. (<code>async_gen_internals</code>)</span></div></span></summary><div class="docblock"><p>A helper constant for internal desugaring – produces <code>Pending</code>,
which corresponds to the async iterator pending on an <code>.await</code>.</p>
</div></details><details class="toggle" open><summary><section id="associatedconstant.FINISHED" class="associatedconstant"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/async_iter/async_iter.rs.html#135">source</a><h4 class="code-header">pub const <a href="#associatedconstant.FINISHED" class="constant">FINISHED</a>: <a class="enum" href="enum.Poll.html" title="enum futures::task::Poll">Poll</a>&lt;<a class="enum" href="https://doc.rust-lang.org/1.76.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a>&lt;T&gt;&gt; = _</h4></section><span class="item-info"><div class="stab unstable"><span class="emoji">🔬</span><span>This is a nightly-only experimental API. (<code>async_gen_internals</code>)</span></div></span></summary><div class="docblock"><p>A helper constant for internal desugaring – produces <code>Ready(None)</code>,
which corresponds to the async iterator finishing its iteration.</p>
</div></details></div></details><details class="toggle implementors-toggle" open><summary><section id="impl-Poll%3CT%3E" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/task/poll.rs.html#28">source</a><a href="#impl-Poll%3CT%3E" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; <a class="enum" href="enum.Poll.html" title="enum futures::task::Poll">Poll</a>&lt;T&gt;</h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.map" class="method"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/task/poll.rs.html#47-49">source</a><h4 class="code-header">pub fn <a href="#method.map" class="fn">map</a>&lt;U, F&gt;(self, f: F) -&gt; <a class="enum" href="enum.Poll.html" title="enum futures::task::Poll">Poll</a>&lt;U&gt;<div class="where">where
F: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(T) -&gt; U,</div></h4></section></summary><div class="docblock"><p>Maps a <code>Poll&lt;T&gt;</code> to <code>Poll&lt;U&gt;</code> by applying a function to a contained value.</p>
<h5 id="examples"><a href="#examples">Examples</a></h5>
<p>Converts a <code>Poll&lt;<a href="../../std/string/struct.String.html" title="String">String</a>&gt;</code> into a <code>Poll&lt;<a href="https://doc.rust-lang.org/1.76.0/std/primitive.usize.html" title="primitive usize">usize</a>&gt;</code>, consuming
the original:</p>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>poll_some_string = Poll::Ready(String::from(<span class="string">"Hello, World!"</span>));
<span class="comment">// `Poll::map` takes self *by value*, consuming `poll_some_string`
</span><span class="kw">let </span>poll_some_len = poll_some_string.map(|s| s.len());
<span class="macro">assert_eq!</span>(poll_some_len, Poll::Ready(<span class="number">13</span>));</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.is_ready" class="method"><span class="rightside"><span class="since" title="const since 1.49.0">const: 1.49.0</span> · <a class="src" href="https://doc.rust-lang.org/1.76.0/src/core/task/poll.rs.html#72">source</a></span><h4 class="code-header">pub const fn <a href="#method.is_ready" class="fn">is_ready</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.bool.html">bool</a></h4></section></summary><div class="docblock"><p>Returns <code>true</code> if the poll is a <a href="enum.Poll.html#variant.Ready" title="variant futures::task::Poll::Ready"><code>Poll::Ready</code></a> value.</p>
<h5 id="examples-1"><a href="#examples-1">Examples</a></h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>x: Poll&lt;u32&gt; = Poll::Ready(<span class="number">2</span>);
<span class="macro">assert_eq!</span>(x.is_ready(), <span class="bool-val">true</span>);
<span class="kw">let </span>x: Poll&lt;u32&gt; = Poll::Pending;
<span class="macro">assert_eq!</span>(x.is_ready(), <span class="bool-val">false</span>);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.is_pending" class="method"><span class="rightside"><span class="since" title="const since 1.49.0">const: 1.49.0</span> · <a class="src" href="https://doc.rust-lang.org/1.76.0/src/core/task/poll.rs.html#93">source</a></span><h4 class="code-header">pub const fn <a href="#method.is_pending" class="fn">is_pending</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.bool.html">bool</a></h4></section></summary><div class="docblock"><p>Returns <code>true</code> if the poll is a <a href="enum.Poll.html#variant.Pending" title="variant futures::task::Poll::Pending"><code>Pending</code></a> value.</p>
<h5 id="examples-2"><a href="#examples-2">Examples</a></h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>x: Poll&lt;u32&gt; = Poll::Ready(<span class="number">2</span>);
<span class="macro">assert_eq!</span>(x.is_pending(), <span class="bool-val">false</span>);
<span class="kw">let </span>x: Poll&lt;u32&gt; = Poll::Pending;
<span class="macro">assert_eq!</span>(x.is_pending(), <span class="bool-val">true</span>);</code></pre></div>
</div></details></div></details><details class="toggle implementors-toggle" open><summary><section id="impl-Poll%3CResult%3CT,+E%3E%3E" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/task/poll.rs.html#98">source</a><a href="#impl-Poll%3CResult%3CT,+E%3E%3E" class="anchor">§</a><h3 class="code-header">impl&lt;T, E&gt; <a class="enum" href="enum.Poll.html" title="enum futures::task::Poll">Poll</a>&lt;<a class="enum" href="https://doc.rust-lang.org/1.76.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;T, E&gt;&gt;</h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.map_ok" class="method"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/task/poll.rs.html#115-117">source</a><h4 class="code-header">pub fn <a href="#method.map_ok" class="fn">map_ok</a>&lt;U, F&gt;(self, f: F) -&gt; <a class="enum" href="enum.Poll.html" title="enum futures::task::Poll">Poll</a>&lt;<a class="enum" href="https://doc.rust-lang.org/1.76.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;U, E&gt;&gt;<div class="where">where
F: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(T) -&gt; U,</div></h4></section></summary><div class="docblock"><p>Maps a <code>Poll&lt;Result&lt;T, E&gt;&gt;</code> to <code>Poll&lt;Result&lt;U, E&gt;&gt;</code> by applying a
function to a contained <code>Poll::Ready(Ok)</code> value, leaving all other
variants untouched.</p>
<p>This function can be used to compose the results of two functions.</p>
<h5 id="examples-3"><a href="#examples-3">Examples</a></h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>res: Poll&lt;<span class="prelude-ty">Result</span>&lt;u8, <span class="kw">_</span>&gt;&gt; = Poll::Ready(<span class="string">"12"</span>.parse());
<span class="kw">let </span>squared = res.map_ok(|n| n * n);
<span class="macro">assert_eq!</span>(squared, Poll::Ready(<span class="prelude-val">Ok</span>(<span class="number">144</span>)));</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.map_err" class="method"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/task/poll.rs.html#143-145">source</a><h4 class="code-header">pub fn <a href="#method.map_err" class="fn">map_err</a>&lt;U, F&gt;(self, f: F) -&gt; <a class="enum" href="enum.Poll.html" title="enum futures::task::Poll">Poll</a>&lt;<a class="enum" href="https://doc.rust-lang.org/1.76.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;T, U&gt;&gt;<div class="where">where
F: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(E) -&gt; U,</div></h4></section></summary><div class="docblock"><p>Maps a <code>Poll::Ready&lt;Result&lt;T, E&gt;&gt;</code> to <code>Poll::Ready&lt;Result&lt;T, F&gt;&gt;</code> by
applying a function to a contained <code>Poll::Ready(Err)</code> value, leaving all other
variants untouched.</p>
<p>This function can be used to pass through a successful result while handling
an error.</p>
<h5 id="examples-4"><a href="#examples-4">Examples</a></h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>res: Poll&lt;<span class="prelude-ty">Result</span>&lt;u8, <span class="kw">_</span>&gt;&gt; = Poll::Ready(<span class="string">"oops"</span>.parse());
<span class="kw">let </span>res = res.map_err(|<span class="kw">_</span>| <span class="number">0_u8</span>);
<span class="macro">assert_eq!</span>(res, Poll::Ready(<span class="prelude-val">Err</span>(<span class="number">0</span>)));</code></pre></div>
</div></details></div></details><details class="toggle implementors-toggle" open><summary><section id="impl-Poll%3COption%3CResult%3CT,+E%3E%3E%3E" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/task/poll.rs.html#155">source</a><a href="#impl-Poll%3COption%3CResult%3CT,+E%3E%3E%3E" class="anchor">§</a><h3 class="code-header">impl&lt;T, E&gt; <a class="enum" href="enum.Poll.html" title="enum futures::task::Poll">Poll</a>&lt;<a class="enum" href="https://doc.rust-lang.org/1.76.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a>&lt;<a class="enum" href="https://doc.rust-lang.org/1.76.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;T, E&gt;&gt;&gt;</h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.map_ok-1" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.51.0">1.51.0</span> · <a class="src" href="https://doc.rust-lang.org/1.76.0/src/core/task/poll.rs.html#172-174">source</a></span><h4 class="code-header">pub fn <a href="#method.map_ok-1" class="fn">map_ok</a>&lt;U, F&gt;(self, f: F) -&gt; <a class="enum" href="enum.Poll.html" title="enum futures::task::Poll">Poll</a>&lt;<a class="enum" href="https://doc.rust-lang.org/1.76.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a>&lt;<a class="enum" href="https://doc.rust-lang.org/1.76.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;U, E&gt;&gt;&gt;<div class="where">where
F: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(T) -&gt; U,</div></h4></section></summary><div class="docblock"><p>Maps a <code>Poll&lt;Option&lt;Result&lt;T, E&gt;&gt;&gt;</code> to <code>Poll&lt;Option&lt;Result&lt;U, E&gt;&gt;&gt;</code> by
applying a function to a contained <code>Poll::Ready(Some(Ok))</code> value,
leaving all other variants untouched.</p>
<p>This function can be used to compose the results of two functions.</p>
<h5 id="examples-5"><a href="#examples-5">Examples</a></h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>res: Poll&lt;<span class="prelude-ty">Option</span>&lt;<span class="prelude-ty">Result</span>&lt;u8, <span class="kw">_</span>&gt;&gt;&gt; = Poll::Ready(<span class="prelude-val">Some</span>(<span class="string">"12"</span>.parse()));
<span class="kw">let </span>squared = res.map_ok(|n| n * n);
<span class="macro">assert_eq!</span>(squared, Poll::Ready(<span class="prelude-val">Some</span>(<span class="prelude-val">Ok</span>(<span class="number">144</span>))));</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.map_err-1" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.51.0">1.51.0</span> · <a class="src" href="https://doc.rust-lang.org/1.76.0/src/core/task/poll.rs.html#202-204">source</a></span><h4 class="code-header">pub fn <a href="#method.map_err-1" class="fn">map_err</a>&lt;U, F&gt;(self, f: F) -&gt; <a class="enum" href="enum.Poll.html" title="enum futures::task::Poll">Poll</a>&lt;<a class="enum" href="https://doc.rust-lang.org/1.76.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a>&lt;<a class="enum" href="https://doc.rust-lang.org/1.76.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;T, U&gt;&gt;&gt;<div class="where">where
F: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(E) -&gt; U,</div></h4></section></summary><div class="docblock"><p>Maps a <code>Poll::Ready&lt;Option&lt;Result&lt;T, E&gt;&gt;&gt;</code> to
<code>Poll::Ready&lt;Option&lt;Result&lt;T, F&gt;&gt;&gt;</code> by applying a function to a
contained <code>Poll::Ready(Some(Err))</code> value, leaving all other variants
untouched.</p>
<p>This function can be used to pass through a successful result while handling
an error.</p>
<h5 id="examples-6"><a href="#examples-6">Examples</a></h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>res: Poll&lt;<span class="prelude-ty">Option</span>&lt;<span class="prelude-ty">Result</span>&lt;u8, <span class="kw">_</span>&gt;&gt;&gt; = Poll::Ready(<span class="prelude-val">Some</span>(<span class="string">"oops"</span>.parse()));
<span class="kw">let </span>res = res.map_err(|<span class="kw">_</span>| <span class="number">0_u8</span>);
<span class="macro">assert_eq!</span>(res, Poll::Ready(<span class="prelude-val">Some</span>(<span class="prelude-val">Err</span>(<span class="number">0</span>))));</code></pre></div>
</div></details></div></details></div><h2 id="trait-implementations" class="section-header">Trait Implementations<a href="#trait-implementations" class="anchor">§</a></h2><div id="trait-implementations-list"><details class="toggle implementors-toggle" open><summary><section id="impl-Clone-for-Poll%3CT%3E" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/task/poll.rs.html#9">source</a><a href="#impl-Clone-for-Poll%3CT%3E" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a> for <a class="enum" href="enum.Poll.html" title="enum futures::task::Poll">Poll</a>&lt;T&gt;<div class="where">where
T: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.clone" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/task/poll.rs.html#9">source</a><a href="#method.clone" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/clone/trait.Clone.html#tymethod.clone" class="fn">clone</a>(&amp;self) -&gt; <a class="enum" href="enum.Poll.html" title="enum futures::task::Poll">Poll</a>&lt;T&gt;</h4></section></summary><div class='docblock'>Returns a copy of the value. <a href="https://doc.rust-lang.org/1.76.0/core/clone/trait.Clone.html#tymethod.clone">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.clone_from" class="method trait-impl"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="src" href="https://doc.rust-lang.org/1.76.0/src/core/clone.rs.html#169">source</a></span><a href="#method.clone_from" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/clone/trait.Clone.html#method.clone_from" class="fn">clone_from</a>(&amp;mut self, source: <a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.reference.html">&amp;Self</a>)</h4></section></summary><div class='docblock'>Performs copy-assignment from <code>source</code>. <a href="https://doc.rust-lang.org/1.76.0/core/clone/trait.Clone.html#method.clone_from">Read more</a></div></details></div></details><details class="toggle implementors-toggle" open><summary><section id="impl-Debug-for-Poll%3CT%3E" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/task/poll.rs.html#9">source</a><a href="#impl-Debug-for-Poll%3CT%3E" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/fmt/trait.Debug.html" title="trait core::fmt::Debug">Debug</a> for <a class="enum" href="enum.Poll.html" title="enum futures::task::Poll">Poll</a>&lt;T&gt;<div class="where">where
T: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/fmt/trait.Debug.html" title="trait core::fmt::Debug">Debug</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.fmt" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/task/poll.rs.html#9">source</a><a href="#method.fmt" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/fmt/trait.Debug.html#tymethod.fmt" class="fn">fmt</a>(&amp;self, f: &amp;mut <a class="struct" href="https://doc.rust-lang.org/1.76.0/core/fmt/struct.Formatter.html" title="struct core::fmt::Formatter">Formatter</a>&lt;'_&gt;) -&gt; <a class="enum" href="https://doc.rust-lang.org/1.76.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.unit.html">()</a>, <a class="struct" href="https://doc.rust-lang.org/1.76.0/core/fmt/struct.Error.html" title="struct core::fmt::Error">Error</a>&gt;</h4></section></summary><div class='docblock'>Formats the value using the given formatter. <a href="https://doc.rust-lang.org/1.76.0/core/fmt/trait.Debug.html#tymethod.fmt">Read more</a></div></details></div></details><details class="toggle implementors-toggle" open><summary><section id="impl-From%3CT%3E-for-Poll%3CT%3E" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/task/poll.rs.html#216">source</a><a href="#impl-From%3CT%3E-for-Poll%3CT%3E" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.From.html" title="trait core::convert::From">From</a>&lt;T&gt; for <a class="enum" href="enum.Poll.html" title="enum futures::task::Poll">Poll</a>&lt;T&gt;</h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.from" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/task/poll.rs.html#225">source</a><a href="#method.from" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/convert/trait.From.html#tymethod.from" class="fn">from</a>(t: T) -&gt; <a class="enum" href="enum.Poll.html" title="enum futures::task::Poll">Poll</a>&lt;T&gt;</h4></section></summary><div class="docblock"><p>Moves the value into a <a href="enum.Poll.html#variant.Ready" title="variant futures::task::Poll::Ready"><code>Poll::Ready</code></a> to make a <code>Poll&lt;T&gt;</code>.</p>
<h5 id="example"><a href="#example">Example</a></h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="macro">assert_eq!</span>(Poll::from(<span class="bool-val">true</span>), Poll::Ready(<span class="bool-val">true</span>));</code></pre></div>
</div></details></div></details><details class="toggle implementors-toggle" open><summary><section id="impl-FromResidual%3CResult%3CInfallible,+E%3E%3E-for-Poll%3COption%3CResult%3CT,+F%3E%3E%3E" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/task/poll.rs.html#282-283">source</a><a href="#impl-FromResidual%3CResult%3CInfallible,+E%3E%3E-for-Poll%3COption%3CResult%3CT,+F%3E%3E%3E" class="anchor">§</a><h3 class="code-header">impl&lt;T, E, F&gt; <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/ops/try_trait/trait.FromResidual.html" title="trait core::ops::try_trait::FromResidual">FromResidual</a>&lt;<a class="enum" href="https://doc.rust-lang.org/1.76.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;<a class="enum" href="https://doc.rust-lang.org/1.76.0/core/convert/enum.Infallible.html" title="enum core::convert::Infallible">Infallible</a>, E&gt;&gt; for <a class="enum" href="enum.Poll.html" title="enum futures::task::Poll">Poll</a>&lt;<a class="enum" href="https://doc.rust-lang.org/1.76.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a>&lt;<a class="enum" href="https://doc.rust-lang.org/1.76.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;T, F&gt;&gt;&gt;<div class="where">where
F: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.From.html" title="trait core::convert::From">From</a>&lt;E&gt;,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.from_residual-1" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/task/poll.rs.html#286">source</a><a href="#method.from_residual-1" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/ops/try_trait/trait.FromResidual.html#tymethod.from_residual" class="fn">from_residual</a>(x: <a class="enum" href="https://doc.rust-lang.org/1.76.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;<a class="enum" href="https://doc.rust-lang.org/1.76.0/core/convert/enum.Infallible.html" title="enum core::convert::Infallible">Infallible</a>, E&gt;) -&gt; <a class="enum" href="enum.Poll.html" title="enum futures::task::Poll">Poll</a>&lt;<a class="enum" href="https://doc.rust-lang.org/1.76.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a>&lt;<a class="enum" href="https://doc.rust-lang.org/1.76.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;T, F&gt;&gt;&gt;</h4></section></summary><span class="item-info"><div class="stab unstable"><span class="emoji">🔬</span><span>This is a nightly-only experimental API. (<code>try_trait_v2</code>)</span></div></span><div class='docblock'>Constructs the type from a compatible <code>Residual</code> type. <a href="https://doc.rust-lang.org/1.76.0/core/ops/try_trait/trait.FromResidual.html#tymethod.from_residual">Read more</a></div></details></div></details><details class="toggle implementors-toggle" open><summary><section id="impl-FromResidual%3CResult%3CInfallible,+E%3E%3E-for-Poll%3CResult%3CT,+F%3E%3E" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/task/poll.rs.html#251">source</a><a href="#impl-FromResidual%3CResult%3CInfallible,+E%3E%3E-for-Poll%3CResult%3CT,+F%3E%3E" class="anchor">§</a><h3 class="code-header">impl&lt;T, E, F&gt; <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/ops/try_trait/trait.FromResidual.html" title="trait core::ops::try_trait::FromResidual">FromResidual</a>&lt;<a class="enum" href="https://doc.rust-lang.org/1.76.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;<a class="enum" href="https://doc.rust-lang.org/1.76.0/core/convert/enum.Infallible.html" title="enum core::convert::Infallible">Infallible</a>, E&gt;&gt; for <a class="enum" href="enum.Poll.html" title="enum futures::task::Poll">Poll</a>&lt;<a class="enum" href="https://doc.rust-lang.org/1.76.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;T, F&gt;&gt;<div class="where">where
F: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.From.html" title="trait core::convert::From">From</a>&lt;E&gt;,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.from_residual" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/task/poll.rs.html#253">source</a><a href="#method.from_residual" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/ops/try_trait/trait.FromResidual.html#tymethod.from_residual" class="fn">from_residual</a>(x: <a class="enum" href="https://doc.rust-lang.org/1.76.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;<a class="enum" href="https://doc.rust-lang.org/1.76.0/core/convert/enum.Infallible.html" title="enum core::convert::Infallible">Infallible</a>, E&gt;) -&gt; <a class="enum" href="enum.Poll.html" title="enum futures::task::Poll">Poll</a>&lt;<a class="enum" href="https://doc.rust-lang.org/1.76.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;T, F&gt;&gt;</h4></section></summary><span class="item-info"><div class="stab unstable"><span class="emoji">🔬</span><span>This is a nightly-only experimental API. (<code>try_trait_v2</code>)</span></div></span><div class='docblock'>Constructs the type from a compatible <code>Residual</code> type. <a href="https://doc.rust-lang.org/1.76.0/core/ops/try_trait/trait.FromResidual.html#tymethod.from_residual">Read more</a></div></details></div></details><details class="toggle implementors-toggle" open><summary><section id="impl-Hash-for-Poll%3CT%3E" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/task/poll.rs.html#9">source</a><a href="#impl-Hash-for-Poll%3CT%3E" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/hash/trait.Hash.html" title="trait core::hash::Hash">Hash</a> for <a class="enum" href="enum.Poll.html" title="enum futures::task::Poll">Poll</a>&lt;T&gt;<div class="where">where
T: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/hash/trait.Hash.html" title="trait core::hash::Hash">Hash</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.hash" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/task/poll.rs.html#9">source</a><a href="#method.hash" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/hash/trait.Hash.html#tymethod.hash" class="fn">hash</a>&lt;__H&gt;(&amp;self, state: <a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.reference.html">&amp;mut __H</a>)<div class="where">where
__H: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/hash/trait.Hasher.html" title="trait core::hash::Hasher">Hasher</a>,</div></h4></section></summary><div class='docblock'>Feeds this value into the given <a href="https://doc.rust-lang.org/1.76.0/core/hash/trait.Hasher.html" title="trait core::hash::Hasher"><code>Hasher</code></a>. <a href="https://doc.rust-lang.org/1.76.0/core/hash/trait.Hash.html#tymethod.hash">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.hash_slice" class="method trait-impl"><span class="rightside"><span class="since" title="Stable since Rust version 1.3.0">1.3.0</span> · <a class="src" href="https://doc.rust-lang.org/1.76.0/src/core/hash/mod.rs.html#238-240">source</a></span><a href="#method.hash_slice" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/hash/trait.Hash.html#method.hash_slice" class="fn">hash_slice</a>&lt;H&gt;(data: &amp;<a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.slice.html">[Self]</a>, state: <a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.reference.html">&amp;mut H</a>)<div class="where">where
H: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/hash/trait.Hasher.html" title="trait core::hash::Hasher">Hasher</a>,
Self: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</div></h4></section></summary><div class='docblock'>Feeds a slice of this type into the given <a href="https://doc.rust-lang.org/1.76.0/core/hash/trait.Hasher.html" title="trait core::hash::Hasher"><code>Hasher</code></a>. <a href="https://doc.rust-lang.org/1.76.0/core/hash/trait.Hash.html#method.hash_slice">Read more</a></div></details></div></details><details class="toggle implementors-toggle" open><summary><section id="impl-Ord-for-Poll%3CT%3E" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/task/poll.rs.html#9">source</a><a href="#impl-Ord-for-Poll%3CT%3E" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/cmp/trait.Ord.html" title="trait core::cmp::Ord">Ord</a> for <a class="enum" href="enum.Poll.html" title="enum futures::task::Poll">Poll</a>&lt;T&gt;<div class="where">where
T: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/cmp/trait.Ord.html" title="trait core::cmp::Ord">Ord</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.cmp" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/task/poll.rs.html#9">source</a><a href="#method.cmp" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/cmp/trait.Ord.html#tymethod.cmp" class="fn">cmp</a>(&amp;self, other: &amp;<a class="enum" href="enum.Poll.html" title="enum futures::task::Poll">Poll</a>&lt;T&gt;) -&gt; <a class="enum" href="https://doc.rust-lang.org/1.76.0/core/cmp/enum.Ordering.html" title="enum core::cmp::Ordering">Ordering</a></h4></section></summary><div class='docblock'>This method returns an <a href="https://doc.rust-lang.org/1.76.0/core/cmp/enum.Ordering.html" title="enum core::cmp::Ordering"><code>Ordering</code></a> between <code>self</code> and <code>other</code>. <a href="https://doc.rust-lang.org/1.76.0/core/cmp/trait.Ord.html#tymethod.cmp">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.max" class="method trait-impl"><span class="rightside"><span class="since" title="Stable since Rust version 1.21.0">1.21.0</span> · <a class="src" href="https://doc.rust-lang.org/1.76.0/src/core/cmp.rs.html#829-831">source</a></span><a href="#method.max" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/cmp/trait.Ord.html#method.max" class="fn">max</a>(self, other: Self) -&gt; Self<div class="where">where
Self: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</div></h4></section></summary><div class='docblock'>Compares and returns the maximum of two values. <a href="https://doc.rust-lang.org/1.76.0/core/cmp/trait.Ord.html#method.max">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.min" class="method trait-impl"><span class="rightside"><span class="since" title="Stable since Rust version 1.21.0">1.21.0</span> · <a class="src" href="https://doc.rust-lang.org/1.76.0/src/core/cmp.rs.html#849-851">source</a></span><a href="#method.min" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/cmp/trait.Ord.html#method.min" class="fn">min</a>(self, other: Self) -&gt; Self<div class="where">where
Self: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</div></h4></section></summary><div class='docblock'>Compares and returns the minimum of two values. <a href="https://doc.rust-lang.org/1.76.0/core/cmp/trait.Ord.html#method.min">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.clamp" class="method trait-impl"><span class="rightside"><span class="since" title="Stable since Rust version 1.50.0">1.50.0</span> · <a class="src" href="https://doc.rust-lang.org/1.76.0/src/core/cmp.rs.html#874-877">source</a></span><a href="#method.clamp" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/cmp/trait.Ord.html#method.clamp" class="fn">clamp</a>(self, min: Self, max: Self) -&gt; Self<div class="where">where
Self: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/cmp/trait.PartialOrd.html" title="trait core::cmp::PartialOrd">PartialOrd</a>,</div></h4></section></summary><div class='docblock'>Restrict a value to a certain interval. <a href="https://doc.rust-lang.org/1.76.0/core/cmp/trait.Ord.html#method.clamp">Read more</a></div></details></div></details><details class="toggle implementors-toggle" open><summary><section id="impl-PartialEq-for-Poll%3CT%3E" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/task/poll.rs.html#9">source</a><a href="#impl-PartialEq-for-Poll%3CT%3E" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/cmp/trait.PartialEq.html" title="trait core::cmp::PartialEq">PartialEq</a> for <a class="enum" href="enum.Poll.html" title="enum futures::task::Poll">Poll</a>&lt;T&gt;<div class="where">where
T: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/cmp/trait.PartialEq.html" title="trait core::cmp::PartialEq">PartialEq</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.eq" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/task/poll.rs.html#9">source</a><a href="#method.eq" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/cmp/trait.PartialEq.html#tymethod.eq" class="fn">eq</a>(&amp;self, other: &amp;<a class="enum" href="enum.Poll.html" title="enum futures::task::Poll">Poll</a>&lt;T&gt;) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.bool.html">bool</a></h4></section></summary><div class='docblock'>This method tests for <code>self</code> and <code>other</code> values to be equal, and is used
by <code>==</code>.</div></details><details class="toggle method-toggle" open><summary><section id="method.ne" class="method trait-impl"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="src" href="https://doc.rust-lang.org/1.76.0/src/core/cmp.rs.html#242">source</a></span><a href="#method.ne" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/cmp/trait.PartialEq.html#method.ne" class="fn">ne</a>(&amp;self, other: <a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.reference.html">&amp;Rhs</a>) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.bool.html">bool</a></h4></section></summary><div class='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><details class="toggle implementors-toggle" open><summary><section id="impl-PartialOrd-for-Poll%3CT%3E" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/task/poll.rs.html#9">source</a><a href="#impl-PartialOrd-for-Poll%3CT%3E" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/cmp/trait.PartialOrd.html" title="trait core::cmp::PartialOrd">PartialOrd</a> for <a class="enum" href="enum.Poll.html" title="enum futures::task::Poll">Poll</a>&lt;T&gt;<div class="where">where
T: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/cmp/trait.PartialOrd.html" title="trait core::cmp::PartialOrd">PartialOrd</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.partial_cmp" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/task/poll.rs.html#9">source</a><a href="#method.partial_cmp" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/cmp/trait.PartialOrd.html#tymethod.partial_cmp" class="fn">partial_cmp</a>(&amp;self, other: &amp;<a class="enum" href="enum.Poll.html" title="enum futures::task::Poll">Poll</a>&lt;T&gt;) -&gt; <a class="enum" href="https://doc.rust-lang.org/1.76.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a>&lt;<a class="enum" href="https://doc.rust-lang.org/1.76.0/core/cmp/enum.Ordering.html" title="enum core::cmp::Ordering">Ordering</a>&gt;</h4></section></summary><div class='docblock'>This method returns an ordering between <code>self</code> and <code>other</code> values if one exists. <a href="https://doc.rust-lang.org/1.76.0/core/cmp/trait.PartialOrd.html#tymethod.partial_cmp">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.lt" class="method trait-impl"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="src" href="https://doc.rust-lang.org/1.76.0/src/core/cmp.rs.html#1125">source</a></span><a href="#method.lt" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/cmp/trait.PartialOrd.html#method.lt" class="fn">lt</a>(&amp;self, other: <a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.reference.html">&amp;Rhs</a>) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.bool.html">bool</a></h4></section></summary><div class='docblock'>This method tests less than (for <code>self</code> and <code>other</code>) and is used by the <code>&lt;</code> operator. <a href="https://doc.rust-lang.org/1.76.0/core/cmp/trait.PartialOrd.html#method.lt">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.le" class="method trait-impl"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="src" href="https://doc.rust-lang.org/1.76.0/src/core/cmp.rs.html#1142">source</a></span><a href="#method.le" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/cmp/trait.PartialOrd.html#method.le" class="fn">le</a>(&amp;self, other: <a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.reference.html">&amp;Rhs</a>) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.bool.html">bool</a></h4></section></summary><div class='docblock'>This method tests less than or equal to (for <code>self</code> and <code>other</code>) and is used by the <code>&lt;=</code>
operator. <a href="https://doc.rust-lang.org/1.76.0/core/cmp/trait.PartialOrd.html#method.le">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.gt" class="method trait-impl"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="src" href="https://doc.rust-lang.org/1.76.0/src/core/cmp.rs.html#1158">source</a></span><a href="#method.gt" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/cmp/trait.PartialOrd.html#method.gt" class="fn">gt</a>(&amp;self, other: <a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.reference.html">&amp;Rhs</a>) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.bool.html">bool</a></h4></section></summary><div class='docblock'>This method tests greater than (for <code>self</code> and <code>other</code>) and is used by the <code>&gt;</code> operator. <a href="https://doc.rust-lang.org/1.76.0/core/cmp/trait.PartialOrd.html#method.gt">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.ge" class="method trait-impl"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="src" href="https://doc.rust-lang.org/1.76.0/src/core/cmp.rs.html#1175">source</a></span><a href="#method.ge" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/cmp/trait.PartialOrd.html#method.ge" class="fn">ge</a>(&amp;self, other: <a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.reference.html">&amp;Rhs</a>) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.bool.html">bool</a></h4></section></summary><div class='docblock'>This method tests greater than or equal to (for <code>self</code> and <code>other</code>) and is used by the <code>&gt;=</code>
operator. <a href="https://doc.rust-lang.org/1.76.0/core/cmp/trait.PartialOrd.html#method.ge">Read more</a></div></details></div></details><details class="toggle implementors-toggle" open><summary><section id="impl-Try-for-Poll%3COption%3CResult%3CT,+E%3E%3E%3E" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/task/poll.rs.html#261">source</a><a href="#impl-Try-for-Poll%3COption%3CResult%3CT,+E%3E%3E%3E" class="anchor">§</a><h3 class="code-header">impl&lt;T, E&gt; <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/ops/try_trait/trait.Try.html" title="trait core::ops::try_trait::Try">Try</a> for <a class="enum" href="enum.Poll.html" title="enum futures::task::Poll">Poll</a>&lt;<a class="enum" href="https://doc.rust-lang.org/1.76.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a>&lt;<a class="enum" href="https://doc.rust-lang.org/1.76.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;T, E&gt;&gt;&gt;</h3></section></summary><div class="impl-items"><details class="toggle" open><summary><section id="associatedtype.Output" class="associatedtype trait-impl"><a href="#associatedtype.Output" class="anchor">§</a><h4 class="code-header">type <a href="https://doc.rust-lang.org/1.76.0/core/ops/try_trait/trait.Try.html#associatedtype.Output" class="associatedtype">Output</a> = <a class="enum" href="enum.Poll.html" title="enum futures::task::Poll">Poll</a>&lt;<a class="enum" href="https://doc.rust-lang.org/1.76.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a>&lt;T&gt;&gt;</h4></section></summary><span class="item-info"><div class="stab unstable"><span class="emoji">🔬</span><span>This is a nightly-only experimental API. (<code>try_trait_v2</code>)</span></div></span><div class='docblock'>The type of the value produced by <code>?</code> when <em>not</em> short-circuiting.</div></details><details class="toggle" open><summary><section id="associatedtype.Residual" class="associatedtype trait-impl"><a href="#associatedtype.Residual" class="anchor">§</a><h4 class="code-header">type <a href="https://doc.rust-lang.org/1.76.0/core/ops/try_trait/trait.Try.html#associatedtype.Residual" class="associatedtype">Residual</a> = <a class="enum" href="https://doc.rust-lang.org/1.76.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;<a class="enum" href="https://doc.rust-lang.org/1.76.0/core/convert/enum.Infallible.html" title="enum core::convert::Infallible">Infallible</a>, E&gt;</h4></section></summary><span class="item-info"><div class="stab unstable"><span class="emoji">🔬</span><span>This is a nightly-only experimental API. (<code>try_trait_v2</code>)</span></div></span><div class='docblock'>The type of the value passed to <a href="https://doc.rust-lang.org/1.76.0/core/ops/try_trait/trait.FromResidual.html#tymethod.from_residual" title="associated function core::ops::try_trait::FromResidual::from_residual"><code>FromResidual::from_residual</code></a>
as part of <code>?</code> when short-circuiting. <a href="https://doc.rust-lang.org/1.76.0/core/ops/try_trait/trait.Try.html#associatedtype.Residual">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.from_output" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/task/poll.rs.html#266">source</a><a href="#method.from_output" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/ops/try_trait/trait.Try.html#tymethod.from_output" class="fn">from_output</a>(
c: &lt;<a class="enum" href="enum.Poll.html" title="enum futures::task::Poll">Poll</a>&lt;<a class="enum" href="https://doc.rust-lang.org/1.76.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a>&lt;<a class="enum" href="https://doc.rust-lang.org/1.76.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;T, E&gt;&gt;&gt; as <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/ops/try_trait/trait.Try.html" title="trait core::ops::try_trait::Try">Try</a>&gt;::<a class="associatedtype" href="https://doc.rust-lang.org/1.76.0/core/ops/try_trait/trait.Try.html#associatedtype.Output" title="type core::ops::try_trait::Try::Output">Output</a>
) -&gt; <a class="enum" href="enum.Poll.html" title="enum futures::task::Poll">Poll</a>&lt;<a class="enum" href="https://doc.rust-lang.org/1.76.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a>&lt;<a class="enum" href="https://doc.rust-lang.org/1.76.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;T, E&gt;&gt;&gt;</h4></section></summary><span class="item-info"><div class="stab unstable"><span class="emoji">🔬</span><span>This is a nightly-only experimental API. (<code>try_trait_v2</code>)</span></div></span><div class='docblock'>Constructs the type from its <code>Output</code> type. <a href="https://doc.rust-lang.org/1.76.0/core/ops/try_trait/trait.Try.html#tymethod.from_output">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.branch" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/task/poll.rs.html#271">source</a><a href="#method.branch" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/ops/try_trait/trait.Try.html#tymethod.branch" class="fn">branch</a>(
self
) -&gt; <a class="enum" href="https://doc.rust-lang.org/1.76.0/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;&lt;<a class="enum" href="enum.Poll.html" title="enum futures::task::Poll">Poll</a>&lt;<a class="enum" href="https://doc.rust-lang.org/1.76.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a>&lt;<a class="enum" href="https://doc.rust-lang.org/1.76.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;T, E&gt;&gt;&gt; as <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/ops/try_trait/trait.Try.html" title="trait core::ops::try_trait::Try">Try</a>&gt;::<a class="associatedtype" href="https://doc.rust-lang.org/1.76.0/core/ops/try_trait/trait.Try.html#associatedtype.Residual" title="type core::ops::try_trait::Try::Residual">Residual</a>, &lt;<a class="enum" href="enum.Poll.html" title="enum futures::task::Poll">Poll</a>&lt;<a class="enum" href="https://doc.rust-lang.org/1.76.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a>&lt;<a class="enum" href="https://doc.rust-lang.org/1.76.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;T, E&gt;&gt;&gt; as <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/ops/try_trait/trait.Try.html" title="trait core::ops::try_trait::Try">Try</a>&gt;::<a class="associatedtype" href="https://doc.rust-lang.org/1.76.0/core/ops/try_trait/trait.Try.html#associatedtype.Output" title="type core::ops::try_trait::Try::Output">Output</a>&gt;</h4></section></summary><span class="item-info"><div class="stab unstable"><span class="emoji">🔬</span><span>This is a nightly-only experimental API. (<code>try_trait_v2</code>)</span></div></span><div class='docblock'>Used in <code>?</code> to decide whether the operator should produce a value
(because this returned <a href="https://doc.rust-lang.org/1.76.0/core/ops/control_flow/enum.ControlFlow.html#variant.Continue" title="variant core::ops::control_flow::ControlFlow::Continue"><code>ControlFlow::Continue</code></a>)
or propagate a value back to the caller
(because this returned <a href="https://doc.rust-lang.org/1.76.0/core/ops/control_flow/enum.ControlFlow.html#variant.Break" title="variant core::ops::control_flow::ControlFlow::Break"><code>ControlFlow::Break</code></a>). <a href="https://doc.rust-lang.org/1.76.0/core/ops/try_trait/trait.Try.html#tymethod.branch">Read more</a></div></details></div></details><details class="toggle implementors-toggle" open><summary><section id="impl-Try-for-Poll%3CResult%3CT,+E%3E%3E" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/task/poll.rs.html#231">source</a><a href="#impl-Try-for-Poll%3CResult%3CT,+E%3E%3E" class="anchor">§</a><h3 class="code-header">impl&lt;T, E&gt; <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/ops/try_trait/trait.Try.html" title="trait core::ops::try_trait::Try">Try</a> for <a class="enum" href="enum.Poll.html" title="enum futures::task::Poll">Poll</a>&lt;<a class="enum" href="https://doc.rust-lang.org/1.76.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;T, E&gt;&gt;</h3></section></summary><div class="impl-items"><details class="toggle" open><summary><section id="associatedtype.Output-1" class="associatedtype trait-impl"><a href="#associatedtype.Output-1" class="anchor">§</a><h4 class="code-header">type <a href="https://doc.rust-lang.org/1.76.0/core/ops/try_trait/trait.Try.html#associatedtype.Output" class="associatedtype">Output</a> = <a class="enum" href="enum.Poll.html" title="enum futures::task::Poll">Poll</a>&lt;T&gt;</h4></section></summary><span class="item-info"><div class="stab unstable"><span class="emoji">🔬</span><span>This is a nightly-only experimental API. (<code>try_trait_v2</code>)</span></div></span><div class='docblock'>The type of the value produced by <code>?</code> when <em>not</em> short-circuiting.</div></details><details class="toggle" open><summary><section id="associatedtype.Residual-1" class="associatedtype trait-impl"><a href="#associatedtype.Residual-1" class="anchor">§</a><h4 class="code-header">type <a href="https://doc.rust-lang.org/1.76.0/core/ops/try_trait/trait.Try.html#associatedtype.Residual" class="associatedtype">Residual</a> = <a class="enum" href="https://doc.rust-lang.org/1.76.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;<a class="enum" href="https://doc.rust-lang.org/1.76.0/core/convert/enum.Infallible.html" title="enum core::convert::Infallible">Infallible</a>, E&gt;</h4></section></summary><span class="item-info"><div class="stab unstable"><span class="emoji">🔬</span><span>This is a nightly-only experimental API. (<code>try_trait_v2</code>)</span></div></span><div class='docblock'>The type of the value passed to <a href="https://doc.rust-lang.org/1.76.0/core/ops/try_trait/trait.FromResidual.html#tymethod.from_residual" title="associated function core::ops::try_trait::FromResidual::from_residual"><code>FromResidual::from_residual</code></a>
as part of <code>?</code> when short-circuiting. <a href="https://doc.rust-lang.org/1.76.0/core/ops/try_trait/trait.Try.html#associatedtype.Residual">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.from_output-1" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/task/poll.rs.html#236">source</a><a href="#method.from_output-1" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/ops/try_trait/trait.Try.html#tymethod.from_output" class="fn">from_output</a>(c: &lt;<a class="enum" href="enum.Poll.html" title="enum futures::task::Poll">Poll</a>&lt;<a class="enum" href="https://doc.rust-lang.org/1.76.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;T, E&gt;&gt; as <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/ops/try_trait/trait.Try.html" title="trait core::ops::try_trait::Try">Try</a>&gt;::<a class="associatedtype" href="https://doc.rust-lang.org/1.76.0/core/ops/try_trait/trait.Try.html#associatedtype.Output" title="type core::ops::try_trait::Try::Output">Output</a>) -&gt; <a class="enum" href="enum.Poll.html" title="enum futures::task::Poll">Poll</a>&lt;<a class="enum" href="https://doc.rust-lang.org/1.76.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;T, E&gt;&gt;</h4></section></summary><span class="item-info"><div class="stab unstable"><span class="emoji">🔬</span><span>This is a nightly-only experimental API. (<code>try_trait_v2</code>)</span></div></span><div class='docblock'>Constructs the type from its <code>Output</code> type. <a href="https://doc.rust-lang.org/1.76.0/core/ops/try_trait/trait.Try.html#tymethod.from_output">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.branch-1" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/task/poll.rs.html#241">source</a><a href="#method.branch-1" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/ops/try_trait/trait.Try.html#tymethod.branch" class="fn">branch</a>(
self
) -&gt; <a class="enum" href="https://doc.rust-lang.org/1.76.0/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;&lt;<a class="enum" href="enum.Poll.html" title="enum futures::task::Poll">Poll</a>&lt;<a class="enum" href="https://doc.rust-lang.org/1.76.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;T, E&gt;&gt; as <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/ops/try_trait/trait.Try.html" title="trait core::ops::try_trait::Try">Try</a>&gt;::<a class="associatedtype" href="https://doc.rust-lang.org/1.76.0/core/ops/try_trait/trait.Try.html#associatedtype.Residual" title="type core::ops::try_trait::Try::Residual">Residual</a>, &lt;<a class="enum" href="enum.Poll.html" title="enum futures::task::Poll">Poll</a>&lt;<a class="enum" href="https://doc.rust-lang.org/1.76.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;T, E&gt;&gt; as <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/ops/try_trait/trait.Try.html" title="trait core::ops::try_trait::Try">Try</a>&gt;::<a class="associatedtype" href="https://doc.rust-lang.org/1.76.0/core/ops/try_trait/trait.Try.html#associatedtype.Output" title="type core::ops::try_trait::Try::Output">Output</a>&gt;</h4></section></summary><span class="item-info"><div class="stab unstable"><span class="emoji">🔬</span><span>This is a nightly-only experimental API. (<code>try_trait_v2</code>)</span></div></span><div class='docblock'>Used in <code>?</code> to decide whether the operator should produce a value
(because this returned <a href="https://doc.rust-lang.org/1.76.0/core/ops/control_flow/enum.ControlFlow.html#variant.Continue" title="variant core::ops::control_flow::ControlFlow::Continue"><code>ControlFlow::Continue</code></a>)
or propagate a value back to the caller
(because this returned <a href="https://doc.rust-lang.org/1.76.0/core/ops/control_flow/enum.ControlFlow.html#variant.Break" title="variant core::ops::control_flow::ControlFlow::Break"><code>ControlFlow::Break</code></a>). <a href="https://doc.rust-lang.org/1.76.0/core/ops/try_trait/trait.Try.html#tymethod.branch">Read more</a></div></details></div></details><section id="impl-Copy-for-Poll%3CT%3E" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/task/poll.rs.html#9">source</a><a href="#impl-Copy-for-Poll%3CT%3E" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Copy.html" title="trait core::marker::Copy">Copy</a> for <a class="enum" href="enum.Poll.html" title="enum futures::task::Poll">Poll</a>&lt;T&gt;<div class="where">where
T: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Copy.html" title="trait core::marker::Copy">Copy</a>,</div></h3></section><section id="impl-Eq-for-Poll%3CT%3E" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/task/poll.rs.html#9">source</a><a href="#impl-Eq-for-Poll%3CT%3E" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/cmp/trait.Eq.html" title="trait core::cmp::Eq">Eq</a> for <a class="enum" href="enum.Poll.html" title="enum futures::task::Poll">Poll</a>&lt;T&gt;<div class="where">where
T: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/cmp/trait.Eq.html" title="trait core::cmp::Eq">Eq</a>,</div></h3></section><section id="impl-StructuralEq-for-Poll%3CT%3E" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/task/poll.rs.html#9">source</a><a href="#impl-StructuralEq-for-Poll%3CT%3E" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.StructuralEq.html" title="trait core::marker::StructuralEq">StructuralEq</a> for <a class="enum" href="enum.Poll.html" title="enum futures::task::Poll">Poll</a>&lt;T&gt;</h3></section><section id="impl-StructuralPartialEq-for-Poll%3CT%3E" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/task/poll.rs.html#9">source</a><a href="#impl-StructuralPartialEq-for-Poll%3CT%3E" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.StructuralPartialEq.html" title="trait core::marker::StructuralPartialEq">StructuralPartialEq</a> for <a class="enum" href="enum.Poll.html" title="enum futures::task::Poll">Poll</a>&lt;T&gt;</h3></section></div><h2 id="synthetic-implementations" class="section-header">Auto Trait Implementations<a href="#synthetic-implementations" class="anchor">§</a></h2><div id="synthetic-implementations-list"><section id="impl-RefUnwindSafe-for-Poll%3CT%3E" class="impl"><a href="#impl-RefUnwindSafe-for-Poll%3CT%3E" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/panic/unwind_safe/trait.RefUnwindSafe.html" title="trait core::panic::unwind_safe::RefUnwindSafe">RefUnwindSafe</a> for <a class="enum" href="enum.Poll.html" title="enum futures::task::Poll">Poll</a>&lt;T&gt;<div class="where">where
T: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/panic/unwind_safe/trait.RefUnwindSafe.html" title="trait core::panic::unwind_safe::RefUnwindSafe">RefUnwindSafe</a>,</div></h3></section><section id="impl-Send-for-Poll%3CT%3E" class="impl"><a href="#impl-Send-for-Poll%3CT%3E" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> for <a class="enum" href="enum.Poll.html" title="enum futures::task::Poll">Poll</a>&lt;T&gt;<div class="where">where
T: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a>,</div></h3></section><section id="impl-Sync-for-Poll%3CT%3E" class="impl"><a href="#impl-Sync-for-Poll%3CT%3E" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a> for <a class="enum" href="enum.Poll.html" title="enum futures::task::Poll">Poll</a>&lt;T&gt;<div class="where">where
T: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a>,</div></h3></section><section id="impl-Unpin-for-Poll%3CT%3E" class="impl"><a href="#impl-Unpin-for-Poll%3CT%3E" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a> for <a class="enum" href="enum.Poll.html" title="enum futures::task::Poll">Poll</a>&lt;T&gt;<div class="where">where
T: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a>,</div></h3></section><section id="impl-UnwindSafe-for-Poll%3CT%3E" class="impl"><a href="#impl-UnwindSafe-for-Poll%3CT%3E" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/panic/unwind_safe/trait.UnwindSafe.html" title="trait core::panic::unwind_safe::UnwindSafe">UnwindSafe</a> for <a class="enum" href="enum.Poll.html" title="enum futures::task::Poll">Poll</a>&lt;T&gt;<div class="where">where
T: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/panic/unwind_safe/trait.UnwindSafe.html" title="trait core::panic::unwind_safe::UnwindSafe">UnwindSafe</a>,</div></h3></section></div><h2 id="blanket-implementations" class="section-header">Blanket Implementations<a href="#blanket-implementations" class="anchor">§</a></h2><div id="blanket-implementations-list"><details class="toggle implementors-toggle"><summary><section id="impl-Any-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/any.rs.html#140">source</a><a href="#impl-Any-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/any/trait.Any.html" title="trait core::any::Any">Any</a> for T<div class="where">where
T: 'static + ?<a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.type_id" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/any.rs.html#141">source</a><a href="#method.type_id" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/any/trait.Any.html#tymethod.type_id" class="fn">type_id</a>(&amp;self) -&gt; <a class="struct" href="https://doc.rust-lang.org/1.76.0/core/any/struct.TypeId.html" title="struct core::any::TypeId">TypeId</a></h4></section></summary><div class='docblock'>Gets the <code>TypeId</code> of <code>self</code>. <a href="https://doc.rust-lang.org/1.76.0/core/any/trait.Any.html#tymethod.type_id">Read more</a></div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-Borrow%3CT%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/borrow.rs.html#208">source</a><a href="#impl-Borrow%3CT%3E-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/borrow/trait.Borrow.html" title="trait core::borrow::Borrow">Borrow</a>&lt;T&gt; for T<div class="where">where
T: ?<a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.borrow" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/borrow.rs.html#210">source</a><a href="#method.borrow" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/borrow/trait.Borrow.html#tymethod.borrow" class="fn">borrow</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.reference.html">&amp;T</a></h4></section></summary><div class='docblock'>Immutably borrows from an owned value. <a href="https://doc.rust-lang.org/1.76.0/core/borrow/trait.Borrow.html#tymethod.borrow">Read more</a></div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-BorrowMut%3CT%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/borrow.rs.html#216">source</a><a href="#impl-BorrowMut%3CT%3E-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/borrow/trait.BorrowMut.html" title="trait core::borrow::BorrowMut">BorrowMut</a>&lt;T&gt; for T<div class="where">where
T: ?<a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.borrow_mut" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/borrow.rs.html#217">source</a><a href="#method.borrow_mut" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/borrow/trait.BorrowMut.html#tymethod.borrow_mut" class="fn">borrow_mut</a>(&amp;mut self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.reference.html">&amp;mut T</a></h4></section></summary><div class='docblock'>Mutably borrows from an owned value. <a href="https://doc.rust-lang.org/1.76.0/core/borrow/trait.BorrowMut.html#tymethod.borrow_mut">Read more</a></div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-From%3C!%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/convert/mod.rs.html#780">source</a><a href="#impl-From%3C!%3E-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.From.html" title="trait core::convert::From">From</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.never.html">!</a>&gt; for T</h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.from-2" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/convert/mod.rs.html#781">source</a><a href="#method.from-2" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/convert/trait.From.html#tymethod.from" class="fn">from</a>(t: <a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.never.html">!</a>) -&gt; T</h4></section></summary><div class='docblock'>Converts to this type from the input type.</div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-From%3CT%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/convert/mod.rs.html#763">source</a><a href="#impl-From%3CT%3E-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.From.html" title="trait core::convert::From">From</a>&lt;T&gt; for T</h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.from-1" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/convert/mod.rs.html#766">source</a><a href="#method.from-1" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/convert/trait.From.html#tymethod.from" class="fn">from</a>(t: T) -&gt; T</h4></section></summary><div class="docblock"><p>Returns the argument unchanged.</p>
</div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-Into%3CU%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/convert/mod.rs.html#747-749">source</a><a href="#impl-Into%3CU%3E-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T, U&gt; <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a>&lt;U&gt; for T<div class="where">where
U: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.From.html" title="trait core::convert::From">From</a>&lt;T&gt;,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.into" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/convert/mod.rs.html#756">source</a><a href="#method.into" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/convert/trait.Into.html#tymethod.into" class="fn">into</a>(self) -&gt; U</h4></section></summary><div class="docblock"><p>Calls <code>U::from(self)</code>.</p>
<p>That is, this conversion is whatever the implementation of
<code><a href="https://doc.rust-lang.org/1.76.0/core/convert/trait.From.html" title="trait core::convert::From">From</a>&lt;T&gt; for U</code> chooses to do.</p>
</div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-ToOwned-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/alloc/borrow.rs.html#83-85">source</a><a href="#impl-ToOwned-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/1.76.0/alloc/borrow/trait.ToOwned.html" title="trait alloc::borrow::ToOwned">ToOwned</a> for T<div class="where">where
T: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle" open><summary><section id="associatedtype.Owned" class="associatedtype trait-impl"><a href="#associatedtype.Owned" class="anchor">§</a><h4 class="code-header">type <a href="https://doc.rust-lang.org/1.76.0/alloc/borrow/trait.ToOwned.html#associatedtype.Owned" class="associatedtype">Owned</a> = T</h4></section></summary><div class='docblock'>The resulting type after obtaining ownership.</div></details><details class="toggle method-toggle" open><summary><section id="method.to_owned" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/alloc/borrow.rs.html#88">source</a><a href="#method.to_owned" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/alloc/borrow/trait.ToOwned.html#tymethod.to_owned" class="fn">to_owned</a>(&amp;self) -&gt; T</h4></section></summary><div class='docblock'>Creates owned data from borrowed data, usually by cloning. <a href="https://doc.rust-lang.org/1.76.0/alloc/borrow/trait.ToOwned.html#tymethod.to_owned">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.clone_into" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/alloc/borrow.rs.html#92">source</a><a href="#method.clone_into" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/alloc/borrow/trait.ToOwned.html#method.clone_into" class="fn">clone_into</a>(&amp;self, target: <a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.reference.html">&amp;mut T</a>)</h4></section></summary><div class='docblock'>Uses borrowed data to replace owned data, usually by cloning. <a href="https://doc.rust-lang.org/1.76.0/alloc/borrow/trait.ToOwned.html#method.clone_into">Read more</a></div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-TryFrom%3CU%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/convert/mod.rs.html#803-805">source</a><a href="#impl-TryFrom%3CU%3E-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T, U&gt; <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a>&lt;U&gt; for T<div class="where">where
U: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a>&lt;T&gt;,</div></h3></section></summary><div class="impl-items"><details class="toggle" open><summary><section id="associatedtype.Error-1" class="associatedtype trait-impl"><a href="#associatedtype.Error-1" class="anchor">§</a><h4 class="code-header">type <a href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html#associatedtype.Error" class="associatedtype">Error</a> = <a class="enum" href="https://doc.rust-lang.org/1.76.0/core/convert/enum.Infallible.html" title="enum core::convert::Infallible">Infallible</a></h4></section></summary><div class='docblock'>The type returned in the event of a conversion error.</div></details><details class="toggle method-toggle" open><summary><section id="method.try_from" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/convert/mod.rs.html#810">source</a><a href="#method.try_from" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html#tymethod.try_from" class="fn">try_from</a>(value: U) -&gt; <a class="enum" href="https://doc.rust-lang.org/1.76.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;T, &lt;T as <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a>&lt;U&gt;&gt;::<a class="associatedtype" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a>&gt;</h4></section></summary><div class='docblock'>Performs the conversion.</div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-TryInto%3CU%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/convert/mod.rs.html#788-790">source</a><a href="#impl-TryInto%3CU%3E-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T, U&gt; <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryInto.html" title="trait core::convert::TryInto">TryInto</a>&lt;U&gt; for T<div class="where">where
U: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a>&lt;T&gt;,</div></h3></section></summary><div class="impl-items"><details class="toggle" open><summary><section id="associatedtype.Error" class="associatedtype trait-impl"><a href="#associatedtype.Error" class="anchor">§</a><h4 class="code-header">type <a href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryInto.html#associatedtype.Error" class="associatedtype">Error</a> = &lt;U as <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a>&lt;T&gt;&gt;::<a class="associatedtype" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a></h4></section></summary><div class='docblock'>The type returned in the event of a conversion error.</div></details><details class="toggle method-toggle" open><summary><section id="method.try_into" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/convert/mod.rs.html#795">source</a><a href="#method.try_into" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryInto.html#tymethod.try_into" class="fn">try_into</a>(self) -&gt; <a class="enum" href="https://doc.rust-lang.org/1.76.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;U, &lt;U as <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a>&lt;T&gt;&gt;::<a class="associatedtype" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a>&gt;</h4></section></summary><div class='docblock'>Performs the conversion.</div></details></div></details></div></section></div></main></body></html>
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