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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="Selects from a set of channel operations."><title>Select in crossbeam_channel - Rust</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-6b053e98.ttf.woff2,FiraSans-Regular-0fe48ade.woff2,FiraSans-Medium-e1aa3f0a.woff2,SourceCodePro-Regular-8badfe75.ttf.woff2,SourceCodePro-Semibold-aa29a496.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2" crossorigin href="../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../static.files/normalize-9960930a.css"><link rel="stylesheet" href="../static.files/rustdoc-42caa33d.css"><meta name="rustdoc-vars" data-root-path="../" data-static-root-path="../static.files/" data-current-crate="crossbeam_channel" data-themes="" data-resource-suffix="" data-rustdoc-version="1.84.1 (e71f9a9a9 2025-01-27)" data-channel="1.84.1" data-search-js="search-92e6798f.js" data-settings-js="settings-0f613d39.js" ><script src="../static.files/storage-59e33391.js"></script><script defer src="sidebar-items.js"></script><script defer src="../static.files/main-5f194d8c.js"></script><noscript><link rel="stylesheet" href="../static.files/noscript-893ab5e7.css"></noscript><link rel="alternate icon" type="image/png" href="../static.files/favicon-32x32-6580c154.png"><link rel="icon" type="image/svg+xml" href="../static.files/favicon-044be391.svg"></head><body class="rustdoc struct"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="mobile-topbar"><button class="sidebar-menu-toggle" title="show sidebar"></button></nav><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../crossbeam_channel/index.html">crossbeam_<wbr>channel</a><span class="version">0.5.13</span></h2></div><div class="sidebar-elems"><section id="rustdoc-toc"><h2 class="location"><a href="#">Select</a></h2><h3><a href="#">Sections</a></h3><ul class="block top-toc"><li><a href="#examples" title="Examples">Examples</a></li></ul><h3><a href="#implementations">Methods</a></h3><ul class="block method"><li><a href="#method.new" title="new">new</a></li><li><a href="#method.ready" title="ready">ready</a></li><li><a href="#method.ready_deadline" title="ready_deadline">ready_deadline</a></li><li><a href="#method.ready_timeout" title="ready_timeout">ready_timeout</a></li><li><a href="#method.recv" title="recv">recv</a></li><li><a href="#method.remove" title="remove">remove</a></li><li><a href="#method.select" title="select">select</a></li><li><a href="#method.select_deadline" title="select_deadline">select_deadline</a></li><li><a href="#method.select_timeout" title="select_timeout">select_timeout</a></li><li><a href="#method.send" title="send">send</a></li><li><a href="#method.try_ready" title="try_ready">try_ready</a></li><li><a href="#method.try_select" title="try_select">try_select</a></li></ul><h3><a href="#trait-implementations">Trait Implementations</a></h3><ul class="block trait-implementation"><li><a href="#impl-Clone-for-Select%3C'a%3E" title="Clone">Clone</a></li><li><a href="#impl-Debug-for-Select%3C'_%3E" title="Debug">Debug</a></li><li><a href="#impl-Default-for-Select%3C'a%3E" title="Default">Default</a></li><li><a href="#impl-Send-for-Select%3C'_%3E" title="Send">Send</a></li><li><a href="#impl-Sync-for-Select%3C'_%3E" title="Sync">Sync</a></li></ul><h3><a href="#synthetic-implementations">Auto Trait Implementations</a></h3><ul class="block synthetic-implementation"><li><a href="#impl-RefUnwindSafe-for-Select%3C'a%3E" title="!RefUnwindSafe">!RefUnwindSafe</a></li><li><a href="#impl-UnwindSafe-for-Select%3C'a%3E" title="!UnwindSafe">!UnwindSafe</a></li><li><a href="#impl-Freeze-for-Select%3C'a%3E" title="Freeze">Freeze</a></li><li><a href="#impl-Unpin-for-Select%3C'a%3E" title="Unpin">Unpin</a></li></ul><h3><a href="#blanket-implementations">Blanket Implementations</a></h3><ul class="block blanket-implementation"><li><a href="#impl-Any-for-T" title="Any">Any</a></li><li><a href="#impl-Borrow%3CT%3E-for-T" title="Borrow<T>">Borrow<T></a></li><li><a href="#impl-BorrowMut%3CT%3E-for-T" title="BorrowMut<T>">BorrowMut<T></a></li><li><a href="#impl-CloneToUninit-for-T" title="CloneToUninit">CloneToUninit</a></li><li><a href="#impl-From%3CT%3E-for-T" title="From<T>">From<T></a></li><li><a href="#impl-Into%3CU%3E-for-T" title="Into<U>">Into<U></a></li><li><a href="#impl-ToOwned-for-T" title="ToOwned">ToOwned</a></li><li><a href="#impl-TryFrom%3CU%3E-for-T" title="TryFrom<U>">TryFrom<U></a></li><li><a href="#impl-TryInto%3CU%3E-for-T" title="TryInto<U>">TryInto<U></a></li></ul></section><div id="rustdoc-modnav"><h2 class="in-crate"><a href="index.html">In crate crossbeam_<wbr>channel</a></h2></div></div></nav><div class="sidebar-resizer"></div><main><div class="width-limiter"><rustdoc-search></rustdoc-search><section id="main-content" class="content"><div class="main-heading"><span class="rustdoc-breadcrumbs"><a href="index.html">crossbeam_channel</a></span><h1>Struct <span class="struct">Select</span><button id="copy-path" title="Copy item path to clipboard">Copy item path</button></h1><rustdoc-toolbar></rustdoc-toolbar><span class="sub-heading"><a class="src" href="../src/crossbeam_channel/select.rs.html#608-614">Source</a> </span></div><pre class="rust item-decl"><code>pub struct Select<'a> { <span class="comment">/* private fields */</span> }</code></pre><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>Selects from a set of channel operations.</p>
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<p><code>Select</code> allows you to define a set of channel operations, wait until any one of them becomes
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ready, and finally execute it. If multiple operations are ready at the same time, a random one
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among them is selected.</p>
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<p>An operation is considered to be ready if it doesn’t have to block. Note that it is ready even
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when it will simply return an error because the channel is disconnected.</p>
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<p>The <a href="macro.select.html" title="macro crossbeam_channel::select"><code>select!</code></a> macro is a convenience wrapper around <code>Select</code>. However, it cannot select over a
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dynamically created list of channel operations.</p>
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<p>Once a list of operations has been built with <code>Select</code>, there are two different ways of
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proceeding:</p>
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<ul>
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<li>
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<p>Select an operation with <a href="struct.Select.html#method.try_select" title="method crossbeam_channel::Select::try_select"><code>try_select</code></a>, <a href="struct.Select.html#method.select" title="method crossbeam_channel::Select::select"><code>select</code></a>, or <a href="struct.Select.html#method.select_timeout" title="method crossbeam_channel::Select::select_timeout"><code>select_timeout</code></a>. If successful,
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the returned selected operation has already begun and <strong>must</strong> be completed. If we don’t
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complete it, a panic will occur.</p>
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</li>
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<li>
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<p>Wait for an operation to become ready with <a href="struct.Select.html#method.try_ready" title="method crossbeam_channel::Select::try_ready"><code>try_ready</code></a>, <a href="struct.Select.html#method.ready" title="method crossbeam_channel::Select::ready"><code>ready</code></a>, or <a href="struct.Select.html#method.ready_timeout" title="method crossbeam_channel::Select::ready_timeout"><code>ready_timeout</code></a>. If
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successful, we may attempt to execute the operation, but are not obliged to. In fact, it’s
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possible for another thread to make the operation not ready just before we try executing it,
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so it’s wise to use a retry loop. However, note that these methods might return with success
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spuriously, so it’s a good idea to always double check if the operation is really ready.</p>
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</li>
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</ul>
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<h2 id="examples"><a class="doc-anchor" href="#examples">§</a>Examples</h2>
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<p>Use <a href="struct.Select.html#method.select" title="method crossbeam_channel::Select::select"><code>select</code></a> to receive a message from a list of receivers:</p>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>crossbeam_channel::{Receiver, RecvError, Select};
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<span class="kw">fn </span>recv_multiple<T>(rs: <span class="kw-2">&</span>[Receiver<T>]) -> <span class="prelude-ty">Result</span><T, RecvError> {
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<span class="comment">// Build a list of operations.
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</span><span class="kw">let </span><span class="kw-2">mut </span>sel = Select::new();
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<span class="kw">for </span>r <span class="kw">in </span>rs {
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sel.recv(r);
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}
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<span class="comment">// Complete the selected operation.
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</span><span class="kw">let </span>oper = sel.select();
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<span class="kw">let </span>index = oper.index();
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oper.recv(<span class="kw-2">&</span>rs[index])
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}</code></pre></div>
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<p>Use <a href="struct.Select.html#method.ready" title="method crossbeam_channel::Select::ready"><code>ready</code></a> to receive a message from a list of receivers:</p>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>crossbeam_channel::{Receiver, RecvError, Select};
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<span class="kw">fn </span>recv_multiple<T>(rs: <span class="kw-2">&</span>[Receiver<T>]) -> <span class="prelude-ty">Result</span><T, RecvError> {
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<span class="comment">// Build a list of operations.
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</span><span class="kw">let </span><span class="kw-2">mut </span>sel = Select::new();
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<span class="kw">for </span>r <span class="kw">in </span>rs {
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sel.recv(r);
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}
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<span class="kw">loop </span>{
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<span class="comment">// Wait until a receive operation becomes ready and try executing it.
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</span><span class="kw">let </span>index = sel.ready();
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<span class="kw">let </span>res = rs[index].try_recv();
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<span class="comment">// If the operation turns out not to be ready, retry.
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</span><span class="kw">if let </span><span class="prelude-val">Err</span>(e) = res {
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<span class="kw">if </span>e.is_empty() {
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<span class="kw">continue</span>;
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}
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}
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<span class="comment">// Success!
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</span><span class="kw">return </span>res.map_err(|<span class="kw">_</span>| RecvError);
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}
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}</code></pre></div>
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</div></details><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-Select%3C'a%3E" class="impl"><a class="src rightside" href="../src/crossbeam_channel/select.rs.html#619-1116">Source</a><a href="#impl-Select%3C'a%3E" class="anchor">§</a><h3 class="code-header">impl<'a> <a class="struct" href="struct.Select.html" title="struct crossbeam_channel::Select">Select</a><'a></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.new" class="method"><a class="src rightside" href="../src/crossbeam_channel/select.rs.html#632-637">Source</a><h4 class="code-header">pub fn <a href="#method.new" class="fn">new</a>() -> <a class="struct" href="struct.Select.html" title="struct crossbeam_channel::Select">Select</a><'a></h4></section></summary><div class="docblock"><p>Creates an empty list of channel operations for selection.</p>
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<h5 id="examples-1"><a class="doc-anchor" href="#examples-1">§</a>Examples</h5>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>crossbeam_channel::Select;
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<span class="kw">let </span><span class="kw-2">mut </span>sel = Select::new();
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<span class="comment">// The list of operations is empty, which means no operation can be selected.
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</span><span class="macro">assert!</span>(sel.try_select().is_err());</code></pre></div>
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</div></details><details class="toggle method-toggle" open><summary><section id="method.send" class="method"><a class="src rightside" href="../src/crossbeam_channel/select.rs.html#653-659">Source</a><h4 class="code-header">pub fn <a href="#method.send" class="fn">send</a><T>(&mut self, s: &'a <a class="struct" href="struct.Sender.html" title="struct crossbeam_channel::Sender">Sender</a><T>) -> <a class="primitive" href="https://doc.rust-lang.org/1.84.1/std/primitive.usize.html">usize</a></h4></section></summary><div class="docblock"><p>Adds a send operation.</p>
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<p>Returns the index of the added operation.</p>
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<h5 id="examples-2"><a class="doc-anchor" href="#examples-2">§</a>Examples</h5>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>crossbeam_channel::{unbounded, Select};
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<span class="kw">let </span>(s, r) = unbounded::<i32>();
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<span class="kw">let </span><span class="kw-2">mut </span>sel = Select::new();
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<span class="kw">let </span>index = sel.send(<span class="kw-2">&</span>s);</code></pre></div>
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</div></details><details class="toggle method-toggle" open><summary><section id="method.recv" class="method"><a class="src rightside" href="../src/crossbeam_channel/select.rs.html#675-681">Source</a><h4 class="code-header">pub fn <a href="#method.recv" class="fn">recv</a><T>(&mut self, r: &'a <a class="struct" href="struct.Receiver.html" title="struct crossbeam_channel::Receiver">Receiver</a><T>) -> <a class="primitive" href="https://doc.rust-lang.org/1.84.1/std/primitive.usize.html">usize</a></h4></section></summary><div class="docblock"><p>Adds a receive operation.</p>
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<p>Returns the index of the added operation.</p>
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<h5 id="examples-3"><a class="doc-anchor" href="#examples-3">§</a>Examples</h5>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>crossbeam_channel::{unbounded, Select};
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<span class="kw">let </span>(s, r) = unbounded::<i32>();
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<span class="kw">let </span><span class="kw-2">mut </span>sel = Select::new();
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<span class="kw">let </span>index = sel.recv(<span class="kw-2">&</span>r);</code></pre></div>
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</div></details><details class="toggle method-toggle" open><summary><section id="method.remove" class="method"><a class="src rightside" href="../src/crossbeam_channel/select.rs.html#719-736">Source</a><h4 class="code-header">pub fn <a href="#method.remove" class="fn">remove</a>(&mut self, index: <a class="primitive" href="https://doc.rust-lang.org/1.84.1/std/primitive.usize.html">usize</a>)</h4></section></summary><div class="docblock"><p>Removes a previously added operation.</p>
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<p>This is useful when an operation is selected because the channel got disconnected and we
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want to try again to select a different operation instead.</p>
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<p>If new operations are added after removing some, the indices of removed operations will not
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be reused.</p>
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<h5 id="panics"><a class="doc-anchor" href="#panics">§</a>Panics</h5>
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<p>An attempt to remove a non-existing or already removed operation will panic.</p>
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<h5 id="examples-4"><a class="doc-anchor" href="#examples-4">§</a>Examples</h5>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>crossbeam_channel::{unbounded, Select};
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<span class="kw">let </span>(s1, r1) = unbounded::<i32>();
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<span class="kw">let </span>(<span class="kw">_</span>, r2) = unbounded::<i32>();
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<span class="kw">let </span><span class="kw-2">mut </span>sel = Select::new();
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<span class="kw">let </span>oper1 = sel.recv(<span class="kw-2">&</span>r1);
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<span class="kw">let </span>oper2 = sel.recv(<span class="kw-2">&</span>r2);
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<span class="comment">// Both operations are initially ready, so a random one will be executed.
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</span><span class="kw">let </span>oper = sel.select();
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<span class="macro">assert_eq!</span>(oper.index(), oper2);
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<span class="macro">assert!</span>(oper.recv(<span class="kw-2">&</span>r2).is_err());
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sel.remove(oper2);
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s1.send(<span class="number">10</span>).unwrap();
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<span class="kw">let </span>oper = sel.select();
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<span class="macro">assert_eq!</span>(oper.index(), oper1);
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<span class="macro">assert_eq!</span>(oper.recv(<span class="kw-2">&</span>r1), <span class="prelude-val">Ok</span>(<span class="number">10</span>));</code></pre></div>
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</div></details><details class="toggle method-toggle" open><summary><section id="method.try_select" class="method"><a class="src rightside" href="../src/crossbeam_channel/select.rs.html#776-778">Source</a><h4 class="code-header">pub fn <a href="#method.try_select" class="fn">try_select</a>(&mut self) -> <a class="enum" href="https://doc.rust-lang.org/1.84.1/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="struct" href="struct.SelectedOperation.html" title="struct crossbeam_channel::SelectedOperation">SelectedOperation</a><'a>, <a class="struct" href="struct.TrySelectError.html" title="struct crossbeam_channel::TrySelectError">TrySelectError</a>></h4></section></summary><div class="docblock"><p>Attempts to select one of the operations without blocking.</p>
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<p>If an operation is ready, it is selected and returned. If multiple operations are ready at
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the same time, a random one among them is selected. If none of the operations are ready, an
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error is returned.</p>
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<p>An operation is considered to be ready if it doesn’t have to block. Note that it is ready
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even when it will simply return an error because the channel is disconnected.</p>
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<p>The selected operation must be completed with <a href="struct.SelectedOperation.html#method.send" title="method crossbeam_channel::SelectedOperation::send"><code>SelectedOperation::send</code></a>
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or <a href="struct.SelectedOperation.html#method.recv" title="method crossbeam_channel::SelectedOperation::recv"><code>SelectedOperation::recv</code></a>.</p>
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<h5 id="examples-5"><a class="doc-anchor" href="#examples-5">§</a>Examples</h5>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>crossbeam_channel::{unbounded, Select};
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<span class="kw">let </span>(s1, r1) = unbounded();
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<span class="kw">let </span>(s2, r2) = unbounded();
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||
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s1.send(<span class="number">10</span>).unwrap();
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s2.send(<span class="number">20</span>).unwrap();
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<span class="kw">let </span><span class="kw-2">mut </span>sel = Select::new();
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<span class="kw">let </span>oper1 = sel.recv(<span class="kw-2">&</span>r1);
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<span class="kw">let </span>oper2 = sel.recv(<span class="kw-2">&</span>r2);
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<span class="comment">// Both operations are initially ready, so a random one will be executed.
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</span><span class="kw">let </span>oper = sel.try_select();
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<span class="kw">match </span>oper {
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<span class="prelude-val">Err</span>(<span class="kw">_</span>) => <span class="macro">panic!</span>(<span class="string">"both operations should be ready"</span>),
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<span class="prelude-val">Ok</span>(oper) => <span class="kw">match </span>oper.index() {
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i <span class="kw">if </span>i == oper1 => <span class="macro">assert_eq!</span>(oper.recv(<span class="kw-2">&</span>r1), <span class="prelude-val">Ok</span>(<span class="number">10</span>)),
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i <span class="kw">if </span>i == oper2 => <span class="macro">assert_eq!</span>(oper.recv(<span class="kw-2">&</span>r2), <span class="prelude-val">Ok</span>(<span class="number">20</span>)),
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<span class="kw">_ </span>=> <span class="macro">unreachable!</span>(),
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}
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}</code></pre></div>
|
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</div></details><details class="toggle method-toggle" open><summary><section id="method.select" class="method"><a class="src rightside" href="../src/crossbeam_channel/select.rs.html#823-825">Source</a><h4 class="code-header">pub fn <a href="#method.select" class="fn">select</a>(&mut self) -> <a class="struct" href="struct.SelectedOperation.html" title="struct crossbeam_channel::SelectedOperation">SelectedOperation</a><'a></h4></section></summary><div class="docblock"><p>Blocks until one of the operations becomes ready and selects it.</p>
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<p>Once an operation becomes ready, it is selected and returned. If multiple operations are
|
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ready at the same time, a random one among them is selected.</p>
|
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<p>An operation is considered to be ready if it doesn’t have to block. Note that it is ready
|
||
even when it will simply return an error because the channel is disconnected.</p>
|
||
<p>The selected operation must be completed with <a href="struct.SelectedOperation.html#method.send" title="method crossbeam_channel::SelectedOperation::send"><code>SelectedOperation::send</code></a>
|
||
or <a href="struct.SelectedOperation.html#method.recv" title="method crossbeam_channel::SelectedOperation::recv"><code>SelectedOperation::recv</code></a>.</p>
|
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<h5 id="panics-1"><a class="doc-anchor" href="#panics-1">§</a>Panics</h5>
|
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<p>Panics if no operations have been added to <code>Select</code>.</p>
|
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<h5 id="examples-6"><a class="doc-anchor" href="#examples-6">§</a>Examples</h5>
|
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>std::thread;
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<span class="kw">use </span>std::time::Duration;
|
||
<span class="kw">use </span>crossbeam_channel::{unbounded, Select};
|
||
|
||
<span class="kw">let </span>(s1, r1) = unbounded();
|
||
<span class="kw">let </span>(s2, r2) = unbounded();
|
||
|
||
thread::spawn(<span class="kw">move </span>|| {
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thread::sleep(Duration::from_secs(<span class="number">1</span>));
|
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s1.send(<span class="number">10</span>).unwrap();
|
||
});
|
||
thread::spawn(<span class="kw">move </span>|| s2.send(<span class="number">20</span>).unwrap());
|
||
|
||
<span class="kw">let </span><span class="kw-2">mut </span>sel = Select::new();
|
||
<span class="kw">let </span>oper1 = sel.recv(<span class="kw-2">&</span>r1);
|
||
<span class="kw">let </span>oper2 = sel.recv(<span class="kw-2">&</span>r2);
|
||
|
||
<span class="comment">// The second operation will be selected because it becomes ready first.
|
||
</span><span class="kw">let </span>oper = sel.select();
|
||
<span class="kw">match </span>oper.index() {
|
||
i <span class="kw">if </span>i == oper1 => <span class="macro">assert_eq!</span>(oper.recv(<span class="kw-2">&</span>r1), <span class="prelude-val">Ok</span>(<span class="number">10</span>)),
|
||
i <span class="kw">if </span>i == oper2 => <span class="macro">assert_eq!</span>(oper.recv(<span class="kw-2">&</span>r2), <span class="prelude-val">Ok</span>(<span class="number">20</span>)),
|
||
<span class="kw">_ </span>=> <span class="macro">unreachable!</span>(),
|
||
}</code></pre></div>
|
||
</div></details><details class="toggle method-toggle" open><summary><section id="method.select_timeout" class="method"><a class="src rightside" href="../src/crossbeam_channel/select.rs.html#870-875">Source</a><h4 class="code-header">pub fn <a href="#method.select_timeout" class="fn">select_timeout</a>(
|
||
&mut self,
|
||
timeout: <a class="struct" href="https://doc.rust-lang.org/1.84.1/core/time/struct.Duration.html" title="struct core::time::Duration">Duration</a>,
|
||
) -> <a class="enum" href="https://doc.rust-lang.org/1.84.1/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="struct" href="struct.SelectedOperation.html" title="struct crossbeam_channel::SelectedOperation">SelectedOperation</a><'a>, <a class="struct" href="struct.SelectTimeoutError.html" title="struct crossbeam_channel::SelectTimeoutError">SelectTimeoutError</a>></h4></section></summary><div class="docblock"><p>Blocks for a limited time until one of the operations becomes ready and selects it.</p>
|
||
<p>If an operation becomes ready, it is selected and returned. If multiple operations are
|
||
ready at the same time, a random one among them is selected. If none of the operations
|
||
become ready for the specified duration, an error is returned.</p>
|
||
<p>An operation is considered to be ready if it doesn’t have to block. Note that it is ready
|
||
even when it will simply return an error because the channel is disconnected.</p>
|
||
<p>The selected operation must be completed with <a href="struct.SelectedOperation.html#method.send" title="method crossbeam_channel::SelectedOperation::send"><code>SelectedOperation::send</code></a>
|
||
or <a href="struct.SelectedOperation.html#method.recv" title="method crossbeam_channel::SelectedOperation::recv"><code>SelectedOperation::recv</code></a>.</p>
|
||
<h5 id="examples-7"><a class="doc-anchor" href="#examples-7">§</a>Examples</h5>
|
||
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>std::thread;
|
||
<span class="kw">use </span>std::time::Duration;
|
||
<span class="kw">use </span>crossbeam_channel::{unbounded, Select};
|
||
|
||
<span class="kw">let </span>(s1, r1) = unbounded();
|
||
<span class="kw">let </span>(s2, r2) = unbounded();
|
||
|
||
thread::spawn(<span class="kw">move </span>|| {
|
||
thread::sleep(Duration::from_secs(<span class="number">1</span>));
|
||
s1.send(<span class="number">10</span>).unwrap();
|
||
});
|
||
thread::spawn(<span class="kw">move </span>|| s2.send(<span class="number">20</span>).unwrap());
|
||
|
||
<span class="kw">let </span><span class="kw-2">mut </span>sel = Select::new();
|
||
<span class="kw">let </span>oper1 = sel.recv(<span class="kw-2">&</span>r1);
|
||
<span class="kw">let </span>oper2 = sel.recv(<span class="kw-2">&</span>r2);
|
||
|
||
<span class="comment">// The second operation will be selected because it becomes ready first.
|
||
</span><span class="kw">let </span>oper = sel.select_timeout(Duration::from_millis(<span class="number">500</span>));
|
||
<span class="kw">match </span>oper {
|
||
<span class="prelude-val">Err</span>(<span class="kw">_</span>) => <span class="macro">panic!</span>(<span class="string">"should not have timed out"</span>),
|
||
<span class="prelude-val">Ok</span>(oper) => <span class="kw">match </span>oper.index() {
|
||
i <span class="kw">if </span>i == oper1 => <span class="macro">assert_eq!</span>(oper.recv(<span class="kw-2">&</span>r1), <span class="prelude-val">Ok</span>(<span class="number">10</span>)),
|
||
i <span class="kw">if </span>i == oper2 => <span class="macro">assert_eq!</span>(oper.recv(<span class="kw-2">&</span>r2), <span class="prelude-val">Ok</span>(<span class="number">20</span>)),
|
||
<span class="kw">_ </span>=> <span class="macro">unreachable!</span>(),
|
||
}
|
||
}</code></pre></div>
|
||
</div></details><details class="toggle method-toggle" open><summary><section id="method.select_deadline" class="method"><a class="src rightside" href="../src/crossbeam_channel/select.rs.html#922-927">Source</a><h4 class="code-header">pub fn <a href="#method.select_deadline" class="fn">select_deadline</a>(
|
||
&mut self,
|
||
deadline: <a class="struct" href="https://doc.rust-lang.org/1.84.1/std/time/struct.Instant.html" title="struct std::time::Instant">Instant</a>,
|
||
) -> <a class="enum" href="https://doc.rust-lang.org/1.84.1/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="struct" href="struct.SelectedOperation.html" title="struct crossbeam_channel::SelectedOperation">SelectedOperation</a><'a>, <a class="struct" href="struct.SelectTimeoutError.html" title="struct crossbeam_channel::SelectTimeoutError">SelectTimeoutError</a>></h4></section></summary><div class="docblock"><p>Blocks until a given deadline, or until one of the operations becomes ready and selects it.</p>
|
||
<p>If an operation becomes ready, it is selected and returned. If multiple operations are
|
||
ready at the same time, a random one among them is selected. If none of the operations
|
||
become ready before the given deadline, an error is returned.</p>
|
||
<p>An operation is considered to be ready if it doesn’t have to block. Note that it is ready
|
||
even when it will simply return an error because the channel is disconnected.</p>
|
||
<p>The selected operation must be completed with <a href="struct.SelectedOperation.html#method.send" title="method crossbeam_channel::SelectedOperation::send"><code>SelectedOperation::send</code></a>
|
||
or <a href="struct.SelectedOperation.html#method.recv" title="method crossbeam_channel::SelectedOperation::recv"><code>SelectedOperation::recv</code></a>.</p>
|
||
<h5 id="examples-8"><a class="doc-anchor" href="#examples-8">§</a>Examples</h5>
|
||
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>std::thread;
|
||
<span class="kw">use </span>std::time::{Instant, Duration};
|
||
<span class="kw">use </span>crossbeam_channel::{unbounded, Select};
|
||
|
||
<span class="kw">let </span>(s1, r1) = unbounded();
|
||
<span class="kw">let </span>(s2, r2) = unbounded();
|
||
|
||
thread::spawn(<span class="kw">move </span>|| {
|
||
thread::sleep(Duration::from_secs(<span class="number">1</span>));
|
||
s1.send(<span class="number">10</span>).unwrap();
|
||
});
|
||
thread::spawn(<span class="kw">move </span>|| s2.send(<span class="number">20</span>).unwrap());
|
||
|
||
<span class="kw">let </span><span class="kw-2">mut </span>sel = Select::new();
|
||
<span class="kw">let </span>oper1 = sel.recv(<span class="kw-2">&</span>r1);
|
||
<span class="kw">let </span>oper2 = sel.recv(<span class="kw-2">&</span>r2);
|
||
|
||
<span class="kw">let </span>deadline = Instant::now() + Duration::from_millis(<span class="number">500</span>);
|
||
|
||
<span class="comment">// The second operation will be selected because it becomes ready first.
|
||
</span><span class="kw">let </span>oper = sel.select_deadline(deadline);
|
||
<span class="kw">match </span>oper {
|
||
<span class="prelude-val">Err</span>(<span class="kw">_</span>) => <span class="macro">panic!</span>(<span class="string">"should not have timed out"</span>),
|
||
<span class="prelude-val">Ok</span>(oper) => <span class="kw">match </span>oper.index() {
|
||
i <span class="kw">if </span>i == oper1 => <span class="macro">assert_eq!</span>(oper.recv(<span class="kw-2">&</span>r1), <span class="prelude-val">Ok</span>(<span class="number">10</span>)),
|
||
i <span class="kw">if </span>i == oper2 => <span class="macro">assert_eq!</span>(oper.recv(<span class="kw-2">&</span>r2), <span class="prelude-val">Ok</span>(<span class="number">20</span>)),
|
||
<span class="kw">_ </span>=> <span class="macro">unreachable!</span>(),
|
||
}
|
||
}</code></pre></div>
|
||
</div></details><details class="toggle method-toggle" open><summary><section id="method.try_ready" class="method"><a class="src rightside" href="../src/crossbeam_channel/select.rs.html#964-969">Source</a><h4 class="code-header">pub fn <a href="#method.try_ready" class="fn">try_ready</a>(&mut self) -> <a class="enum" href="https://doc.rust-lang.org/1.84.1/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/1.84.1/std/primitive.usize.html">usize</a>, <a class="struct" href="struct.TryReadyError.html" title="struct crossbeam_channel::TryReadyError">TryReadyError</a>></h4></section></summary><div class="docblock"><p>Attempts to find a ready operation without blocking.</p>
|
||
<p>If an operation is ready, its index is returned. If multiple operations are ready at the
|
||
same time, a random one among them is chosen. If none of the operations are ready, an error
|
||
is returned.</p>
|
||
<p>An operation is considered to be ready if it doesn’t have to block. Note that it is ready
|
||
even when it will simply return an error because the channel is disconnected.</p>
|
||
<p>Note that this method might return with success spuriously, so it’s a good idea to always
|
||
double check if the operation is really ready.</p>
|
||
<h5 id="examples-9"><a class="doc-anchor" href="#examples-9">§</a>Examples</h5>
|
||
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>crossbeam_channel::{unbounded, Select};
|
||
|
||
<span class="kw">let </span>(s1, r1) = unbounded();
|
||
<span class="kw">let </span>(s2, r2) = unbounded();
|
||
|
||
s1.send(<span class="number">10</span>).unwrap();
|
||
s2.send(<span class="number">20</span>).unwrap();
|
||
|
||
<span class="kw">let </span><span class="kw-2">mut </span>sel = Select::new();
|
||
<span class="kw">let </span>oper1 = sel.recv(<span class="kw-2">&</span>r1);
|
||
<span class="kw">let </span>oper2 = sel.recv(<span class="kw-2">&</span>r2);
|
||
|
||
<span class="comment">// Both operations are initially ready, so a random one will be chosen.
|
||
</span><span class="kw">match </span>sel.try_ready() {
|
||
<span class="prelude-val">Err</span>(<span class="kw">_</span>) => <span class="macro">panic!</span>(<span class="string">"both operations should be ready"</span>),
|
||
<span class="prelude-val">Ok</span>(i) <span class="kw">if </span>i == oper1 => <span class="macro">assert_eq!</span>(r1.try_recv(), <span class="prelude-val">Ok</span>(<span class="number">10</span>)),
|
||
<span class="prelude-val">Ok</span>(i) <span class="kw">if </span>i == oper2 => <span class="macro">assert_eq!</span>(r2.try_recv(), <span class="prelude-val">Ok</span>(<span class="number">20</span>)),
|
||
<span class="prelude-val">Ok</span>(<span class="kw">_</span>) => <span class="macro">unreachable!</span>(),
|
||
}</code></pre></div>
|
||
</div></details><details class="toggle method-toggle" open><summary><section id="method.ready" class="method"><a class="src rightside" href="../src/crossbeam_channel/select.rs.html#1013-1019">Source</a><h4 class="code-header">pub fn <a href="#method.ready" class="fn">ready</a>(&mut self) -> <a class="primitive" href="https://doc.rust-lang.org/1.84.1/std/primitive.usize.html">usize</a></h4></section></summary><div class="docblock"><p>Blocks until one of the operations becomes ready.</p>
|
||
<p>Once an operation becomes ready, its index is returned. If multiple operations are ready at
|
||
the same time, a random one among them is chosen.</p>
|
||
<p>An operation is considered to be ready if it doesn’t have to block. Note that it is ready
|
||
even when it will simply return an error because the channel is disconnected.</p>
|
||
<p>Note that this method might return with success spuriously, so it’s a good idea to always
|
||
double check if the operation is really ready.</p>
|
||
<h5 id="panics-2"><a class="doc-anchor" href="#panics-2">§</a>Panics</h5>
|
||
<p>Panics if no operations have been added to <code>Select</code>.</p>
|
||
<h5 id="examples-10"><a class="doc-anchor" href="#examples-10">§</a>Examples</h5>
|
||
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>std::thread;
|
||
<span class="kw">use </span>std::time::Duration;
|
||
<span class="kw">use </span>crossbeam_channel::{unbounded, Select};
|
||
|
||
<span class="kw">let </span>(s1, r1) = unbounded();
|
||
<span class="kw">let </span>(s2, r2) = unbounded();
|
||
|
||
thread::spawn(<span class="kw">move </span>|| {
|
||
thread::sleep(Duration::from_secs(<span class="number">1</span>));
|
||
s1.send(<span class="number">10</span>).unwrap();
|
||
});
|
||
thread::spawn(<span class="kw">move </span>|| s2.send(<span class="number">20</span>).unwrap());
|
||
|
||
<span class="kw">let </span><span class="kw-2">mut </span>sel = Select::new();
|
||
<span class="kw">let </span>oper1 = sel.recv(<span class="kw-2">&</span>r1);
|
||
<span class="kw">let </span>oper2 = sel.recv(<span class="kw-2">&</span>r2);
|
||
|
||
<span class="comment">// The second operation will be selected because it becomes ready first.
|
||
</span><span class="kw">match </span>sel.ready() {
|
||
i <span class="kw">if </span>i == oper1 => <span class="macro">assert_eq!</span>(r1.try_recv(), <span class="prelude-val">Ok</span>(<span class="number">10</span>)),
|
||
i <span class="kw">if </span>i == oper2 => <span class="macro">assert_eq!</span>(r2.try_recv(), <span class="prelude-val">Ok</span>(<span class="number">20</span>)),
|
||
<span class="kw">_ </span>=> <span class="macro">unreachable!</span>(),
|
||
}</code></pre></div>
|
||
</div></details><details class="toggle method-toggle" open><summary><section id="method.ready_timeout" class="method"><a class="src rightside" href="../src/crossbeam_channel/select.rs.html#1061-1066">Source</a><h4 class="code-header">pub fn <a href="#method.ready_timeout" class="fn">ready_timeout</a>(
|
||
&mut self,
|
||
timeout: <a class="struct" href="https://doc.rust-lang.org/1.84.1/core/time/struct.Duration.html" title="struct core::time::Duration">Duration</a>,
|
||
) -> <a class="enum" href="https://doc.rust-lang.org/1.84.1/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/1.84.1/std/primitive.usize.html">usize</a>, <a class="struct" href="struct.ReadyTimeoutError.html" title="struct crossbeam_channel::ReadyTimeoutError">ReadyTimeoutError</a>></h4></section></summary><div class="docblock"><p>Blocks for a limited time until one of the operations becomes ready.</p>
|
||
<p>If an operation becomes ready, its index is returned. If multiple operations are ready at
|
||
the same time, a random one among them is chosen. If none of the operations become ready
|
||
for the specified duration, an error is returned.</p>
|
||
<p>An operation is considered to be ready if it doesn’t have to block. Note that it is ready
|
||
even when it will simply return an error because the channel is disconnected.</p>
|
||
<p>Note that this method might return with success spuriously, so it’s a good idea to double
|
||
check if the operation is really ready.</p>
|
||
<h5 id="examples-11"><a class="doc-anchor" href="#examples-11">§</a>Examples</h5>
|
||
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>std::thread;
|
||
<span class="kw">use </span>std::time::Duration;
|
||
<span class="kw">use </span>crossbeam_channel::{unbounded, Select};
|
||
|
||
<span class="kw">let </span>(s1, r1) = unbounded();
|
||
<span class="kw">let </span>(s2, r2) = unbounded();
|
||
|
||
thread::spawn(<span class="kw">move </span>|| {
|
||
thread::sleep(Duration::from_secs(<span class="number">1</span>));
|
||
s1.send(<span class="number">10</span>).unwrap();
|
||
});
|
||
thread::spawn(<span class="kw">move </span>|| s2.send(<span class="number">20</span>).unwrap());
|
||
|
||
<span class="kw">let </span><span class="kw-2">mut </span>sel = Select::new();
|
||
<span class="kw">let </span>oper1 = sel.recv(<span class="kw-2">&</span>r1);
|
||
<span class="kw">let </span>oper2 = sel.recv(<span class="kw-2">&</span>r2);
|
||
|
||
<span class="comment">// The second operation will be selected because it becomes ready first.
|
||
</span><span class="kw">match </span>sel.ready_timeout(Duration::from_millis(<span class="number">500</span>)) {
|
||
<span class="prelude-val">Err</span>(<span class="kw">_</span>) => <span class="macro">panic!</span>(<span class="string">"should not have timed out"</span>),
|
||
<span class="prelude-val">Ok</span>(i) <span class="kw">if </span>i == oper1 => <span class="macro">assert_eq!</span>(r1.try_recv(), <span class="prelude-val">Ok</span>(<span class="number">10</span>)),
|
||
<span class="prelude-val">Ok</span>(i) <span class="kw">if </span>i == oper2 => <span class="macro">assert_eq!</span>(r2.try_recv(), <span class="prelude-val">Ok</span>(<span class="number">20</span>)),
|
||
<span class="prelude-val">Ok</span>(<span class="kw">_</span>) => <span class="macro">unreachable!</span>(),
|
||
}</code></pre></div>
|
||
</div></details><details class="toggle method-toggle" open><summary><section id="method.ready_deadline" class="method"><a class="src rightside" href="../src/crossbeam_channel/select.rs.html#1110-1115">Source</a><h4 class="code-header">pub fn <a href="#method.ready_deadline" class="fn">ready_deadline</a>(
|
||
&mut self,
|
||
deadline: <a class="struct" href="https://doc.rust-lang.org/1.84.1/std/time/struct.Instant.html" title="struct std::time::Instant">Instant</a>,
|
||
) -> <a class="enum" href="https://doc.rust-lang.org/1.84.1/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/1.84.1/std/primitive.usize.html">usize</a>, <a class="struct" href="struct.ReadyTimeoutError.html" title="struct crossbeam_channel::ReadyTimeoutError">ReadyTimeoutError</a>></h4></section></summary><div class="docblock"><p>Blocks until a given deadline, or until one of the operations becomes ready.</p>
|
||
<p>If an operation becomes ready, its index is returned. If multiple operations are ready at
|
||
the same time, a random one among them is chosen. If none of the operations become ready
|
||
before the deadline, an error is returned.</p>
|
||
<p>An operation is considered to be ready if it doesn’t have to block. Note that it is ready
|
||
even when it will simply return an error because the channel is disconnected.</p>
|
||
<p>Note that this method might return with success spuriously, so it’s a good idea to double
|
||
check if the operation is really ready.</p>
|
||
<h5 id="examples-12"><a class="doc-anchor" href="#examples-12">§</a>Examples</h5>
|
||
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>std::thread;
|
||
<span class="kw">use </span>std::time::{Duration, Instant};
|
||
<span class="kw">use </span>crossbeam_channel::{unbounded, Select};
|
||
|
||
<span class="kw">let </span>deadline = Instant::now() + Duration::from_millis(<span class="number">500</span>);
|
||
|
||
<span class="kw">let </span>(s1, r1) = unbounded();
|
||
<span class="kw">let </span>(s2, r2) = unbounded();
|
||
|
||
thread::spawn(<span class="kw">move </span>|| {
|
||
thread::sleep(Duration::from_secs(<span class="number">1</span>));
|
||
s1.send(<span class="number">10</span>).unwrap();
|
||
});
|
||
thread::spawn(<span class="kw">move </span>|| s2.send(<span class="number">20</span>).unwrap());
|
||
|
||
<span class="kw">let </span><span class="kw-2">mut </span>sel = Select::new();
|
||
<span class="kw">let </span>oper1 = sel.recv(<span class="kw-2">&</span>r1);
|
||
<span class="kw">let </span>oper2 = sel.recv(<span class="kw-2">&</span>r2);
|
||
|
||
<span class="comment">// The second operation will be selected because it becomes ready first.
|
||
</span><span class="kw">match </span>sel.ready_deadline(deadline) {
|
||
<span class="prelude-val">Err</span>(<span class="kw">_</span>) => <span class="macro">panic!</span>(<span class="string">"should not have timed out"</span>),
|
||
<span class="prelude-val">Ok</span>(i) <span class="kw">if </span>i == oper1 => <span class="macro">assert_eq!</span>(r1.try_recv(), <span class="prelude-val">Ok</span>(<span class="number">10</span>)),
|
||
<span class="prelude-val">Ok</span>(i) <span class="kw">if </span>i == oper2 => <span class="macro">assert_eq!</span>(r2.try_recv(), <span class="prelude-val">Ok</span>(<span class="number">20</span>)),
|
||
<span class="prelude-val">Ok</span>(<span class="kw">_</span>) => <span class="macro">unreachable!</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-Select%3C'a%3E" class="impl"><a class="src rightside" href="../src/crossbeam_channel/select.rs.html#1118-1125">Source</a><a href="#impl-Clone-for-Select%3C'a%3E" class="anchor">§</a><h3 class="code-header">impl<'a> <a class="trait" href="https://doc.rust-lang.org/1.84.1/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a> for <a class="struct" href="struct.Select.html" title="struct crossbeam_channel::Select">Select</a><'a></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="../src/crossbeam_channel/select.rs.html#1119-1124">Source</a><a href="#method.clone" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.84.1/core/clone/trait.Clone.html#tymethod.clone" class="fn">clone</a>(&self) -> <a class="struct" href="struct.Select.html" title="struct crossbeam_channel::Select">Select</a><'a></h4></section></summary><div class='docblock'>Returns a copy of the value. <a href="https://doc.rust-lang.org/1.84.1/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/1.84.1/src/core/clone.rs.html#174">Source</a></span><a href="#method.clone_from" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.84.1/core/clone/trait.Clone.html#method.clone_from" class="fn">clone_from</a>(&mut self, source: &Self)</h4></section></summary><div class='docblock'>Performs copy-assignment from <code>source</code>. <a href="https://doc.rust-lang.org/1.84.1/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-Select%3C'_%3E" class="impl"><a class="src rightside" href="../src/crossbeam_channel/select.rs.html#1133-1137">Source</a><a href="#impl-Debug-for-Select%3C'_%3E" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.84.1/core/fmt/trait.Debug.html" title="trait core::fmt::Debug">Debug</a> for <a class="struct" href="struct.Select.html" title="struct crossbeam_channel::Select">Select</a><'_></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="../src/crossbeam_channel/select.rs.html#1134-1136">Source</a><a href="#method.fmt" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.84.1/core/fmt/trait.Debug.html#tymethod.fmt" class="fn">fmt</a>(&self, f: &mut <a class="struct" href="https://doc.rust-lang.org/1.84.1/core/fmt/struct.Formatter.html" title="struct core::fmt::Formatter">Formatter</a><'_>) -> <a class="type" href="https://doc.rust-lang.org/1.84.1/core/fmt/type.Result.html" title="type core::fmt::Result">Result</a></h4></section></summary><div class='docblock'>Formats the value using the given formatter. <a href="https://doc.rust-lang.org/1.84.1/core/fmt/trait.Debug.html#tymethod.fmt">Read more</a></div></details></div></details><details class="toggle implementors-toggle" open><summary><section id="impl-Default-for-Select%3C'a%3E" class="impl"><a class="src rightside" href="../src/crossbeam_channel/select.rs.html#1127-1131">Source</a><a href="#impl-Default-for-Select%3C'a%3E" class="anchor">§</a><h3 class="code-header">impl<'a> <a class="trait" href="https://doc.rust-lang.org/1.84.1/core/default/trait.Default.html" title="trait core::default::Default">Default</a> for <a class="struct" href="struct.Select.html" title="struct crossbeam_channel::Select">Select</a><'a></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.default" class="method trait-impl"><a class="src rightside" href="../src/crossbeam_channel/select.rs.html#1128-1130">Source</a><a href="#method.default" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.84.1/core/default/trait.Default.html#tymethod.default" class="fn">default</a>() -> <a class="struct" href="struct.Select.html" title="struct crossbeam_channel::Select">Select</a><'a></h4></section></summary><div class='docblock'>Returns the “default value” for a type. <a href="https://doc.rust-lang.org/1.84.1/core/default/trait.Default.html#tymethod.default">Read more</a></div></details></div></details><section id="impl-Send-for-Select%3C'_%3E" class="impl"><a class="src rightside" href="../src/crossbeam_channel/select.rs.html#616">Source</a><a href="#impl-Send-for-Select%3C'_%3E" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.84.1/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> for <a class="struct" href="struct.Select.html" title="struct crossbeam_channel::Select">Select</a><'_></h3></section><section id="impl-Sync-for-Select%3C'_%3E" class="impl"><a class="src rightside" href="../src/crossbeam_channel/select.rs.html#617">Source</a><a href="#impl-Sync-for-Select%3C'_%3E" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.84.1/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a> for <a class="struct" href="struct.Select.html" title="struct crossbeam_channel::Select">Select</a><'_></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-Freeze-for-Select%3C'a%3E" class="impl"><a href="#impl-Freeze-for-Select%3C'a%3E" class="anchor">§</a><h3 class="code-header">impl<'a> <a class="trait" href="https://doc.rust-lang.org/1.84.1/core/marker/trait.Freeze.html" title="trait core::marker::Freeze">Freeze</a> for <a class="struct" href="struct.Select.html" title="struct crossbeam_channel::Select">Select</a><'a></h3></section><section id="impl-RefUnwindSafe-for-Select%3C'a%3E" class="impl"><a href="#impl-RefUnwindSafe-for-Select%3C'a%3E" class="anchor">§</a><h3 class="code-header">impl<'a> !<a class="trait" href="https://doc.rust-lang.org/1.84.1/core/panic/unwind_safe/trait.RefUnwindSafe.html" title="trait core::panic::unwind_safe::RefUnwindSafe">RefUnwindSafe</a> for <a class="struct" href="struct.Select.html" title="struct crossbeam_channel::Select">Select</a><'a></h3></section><section id="impl-Unpin-for-Select%3C'a%3E" class="impl"><a href="#impl-Unpin-for-Select%3C'a%3E" class="anchor">§</a><h3 class="code-header">impl<'a> <a class="trait" href="https://doc.rust-lang.org/1.84.1/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a> for <a class="struct" href="struct.Select.html" title="struct crossbeam_channel::Select">Select</a><'a></h3></section><section id="impl-UnwindSafe-for-Select%3C'a%3E" class="impl"><a href="#impl-UnwindSafe-for-Select%3C'a%3E" class="anchor">§</a><h3 class="code-header">impl<'a> !<a class="trait" href="https://doc.rust-lang.org/1.84.1/core/panic/unwind_safe/trait.UnwindSafe.html" title="trait core::panic::unwind_safe::UnwindSafe">UnwindSafe</a> for <a class="struct" href="struct.Select.html" title="struct crossbeam_channel::Select">Select</a><'a></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/1.84.1/src/core/any.rs.html#138">Source</a><a href="#impl-Any-for-T" class="anchor">§</a><h3 class="code-header">impl<T> <a class="trait" href="https://doc.rust-lang.org/1.84.1/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/1.84.1/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/1.84.1/src/core/any.rs.html#139">Source</a><a href="#method.type_id" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.84.1/core/any/trait.Any.html#tymethod.type_id" class="fn">type_id</a>(&self) -> <a class="struct" href="https://doc.rust-lang.org/1.84.1/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/1.84.1/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/1.84.1/src/core/borrow.rs.html#209">Source</a><a href="#impl-Borrow%3CT%3E-for-T" class="anchor">§</a><h3 class="code-header">impl<T> <a class="trait" href="https://doc.rust-lang.org/1.84.1/core/borrow/trait.Borrow.html" title="trait core::borrow::Borrow">Borrow</a><T> for T<div class="where">where
|
||
T: ?<a class="trait" href="https://doc.rust-lang.org/1.84.1/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/1.84.1/src/core/borrow.rs.html#211">Source</a><a href="#method.borrow" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.84.1/core/borrow/trait.Borrow.html#tymethod.borrow" class="fn">borrow</a>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/1.84.1/std/primitive.reference.html">&T</a></h4></section></summary><div class='docblock'>Immutably borrows from an owned value. <a href="https://doc.rust-lang.org/1.84.1/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/1.84.1/src/core/borrow.rs.html#217">Source</a><a href="#impl-BorrowMut%3CT%3E-for-T" class="anchor">§</a><h3 class="code-header">impl<T> <a class="trait" href="https://doc.rust-lang.org/1.84.1/core/borrow/trait.BorrowMut.html" title="trait core::borrow::BorrowMut">BorrowMut</a><T> for T<div class="where">where
|
||
T: ?<a class="trait" href="https://doc.rust-lang.org/1.84.1/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/1.84.1/src/core/borrow.rs.html#218">Source</a><a href="#method.borrow_mut" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.84.1/core/borrow/trait.BorrowMut.html#tymethod.borrow_mut" class="fn">borrow_mut</a>(&mut self) -> <a class="primitive" href="https://doc.rust-lang.org/1.84.1/std/primitive.reference.html">&mut T</a></h4></section></summary><div class='docblock'>Mutably borrows from an owned value. <a href="https://doc.rust-lang.org/1.84.1/core/borrow/trait.BorrowMut.html#tymethod.borrow_mut">Read more</a></div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-CloneToUninit-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.84.1/src/core/clone.rs.html#273">Source</a><a href="#impl-CloneToUninit-for-T" class="anchor">§</a><h3 class="code-header">impl<T> <a class="trait" href="https://doc.rust-lang.org/1.84.1/core/clone/trait.CloneToUninit.html" title="trait core::clone::CloneToUninit">CloneToUninit</a> for T<div class="where">where
|
||
T: <a class="trait" href="https://doc.rust-lang.org/1.84.1/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_to_uninit" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.84.1/src/core/clone.rs.html#275">Source</a><a href="#method.clone_to_uninit" class="anchor">§</a><h4 class="code-header">unsafe fn <a href="https://doc.rust-lang.org/1.84.1/core/clone/trait.CloneToUninit.html#tymethod.clone_to_uninit" class="fn">clone_to_uninit</a>(&self, dst: <a class="primitive" href="https://doc.rust-lang.org/1.84.1/std/primitive.pointer.html">*mut </a><a class="primitive" href="https://doc.rust-lang.org/1.84.1/std/primitive.u8.html">u8</a>)</h4></section></summary><span class="item-info"><div class="stab unstable"><span class="emoji">🔬</span><span>This is a nightly-only experimental API. (<code>clone_to_uninit</code>)</span></div></span><div class='docblock'>Performs copy-assignment from <code>self</code> to <code>dst</code>. <a href="https://doc.rust-lang.org/1.84.1/core/clone/trait.CloneToUninit.html#tymethod.clone_to_uninit">Read more</a></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/1.84.1/src/core/convert/mod.rs.html#765">Source</a><a href="#impl-From%3CT%3E-for-T" class="anchor">§</a><h3 class="code-header">impl<T> <a class="trait" href="https://doc.rust-lang.org/1.84.1/core/convert/trait.From.html" title="trait core::convert::From">From</a><T> for T</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/1.84.1/src/core/convert/mod.rs.html#768">Source</a><a href="#method.from" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.84.1/core/convert/trait.From.html#tymethod.from" class="fn">from</a>(t: T) -> 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/1.84.1/src/core/convert/mod.rs.html#748-750">Source</a><a href="#impl-Into%3CU%3E-for-T" class="anchor">§</a><h3 class="code-header">impl<T, U> <a class="trait" href="https://doc.rust-lang.org/1.84.1/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a><U> for T<div class="where">where
|
||
U: <a class="trait" href="https://doc.rust-lang.org/1.84.1/core/convert/trait.From.html" title="trait core::convert::From">From</a><T>,</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/1.84.1/src/core/convert/mod.rs.html#758">Source</a><a href="#method.into" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.84.1/core/convert/trait.Into.html#tymethod.into" class="fn">into</a>(self) -> U</h4></section></summary><div class="docblock"><p>Calls <code>U::from(self)</code>.</p>
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||
<p>That is, this conversion is whatever the implementation of
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||
<code><a href="https://doc.rust-lang.org/1.84.1/core/convert/trait.From.html" title="trait core::convert::From">From</a><T> 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/1.84.1/src/alloc/borrow.rs.html#82-84">Source</a><a href="#impl-ToOwned-for-T" class="anchor">§</a><h3 class="code-header">impl<T> <a class="trait" href="https://doc.rust-lang.org/1.84.1/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/1.84.1/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 class="src rightside" href="https://doc.rust-lang.org/1.84.1/src/alloc/borrow.rs.html#86">Source</a><a href="#associatedtype.Owned" class="anchor">§</a><h4 class="code-header">type <a href="https://doc.rust-lang.org/1.84.1/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/1.84.1/src/alloc/borrow.rs.html#87">Source</a><a href="#method.to_owned" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.84.1/alloc/borrow/trait.ToOwned.html#tymethod.to_owned" class="fn">to_owned</a>(&self) -> T</h4></section></summary><div class='docblock'>Creates owned data from borrowed data, usually by cloning. <a href="https://doc.rust-lang.org/1.84.1/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/1.84.1/src/alloc/borrow.rs.html#91">Source</a><a href="#method.clone_into" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.84.1/alloc/borrow/trait.ToOwned.html#method.clone_into" class="fn">clone_into</a>(&self, target: <a class="primitive" href="https://doc.rust-lang.org/1.84.1/std/primitive.reference.html">&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/1.84.1/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/1.84.1/src/core/convert/mod.rs.html#805-807">Source</a><a href="#impl-TryFrom%3CU%3E-for-T" class="anchor">§</a><h3 class="code-header">impl<T, U> <a class="trait" href="https://doc.rust-lang.org/1.84.1/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><U> for T<div class="where">where
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U: <a class="trait" href="https://doc.rust-lang.org/1.84.1/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a><T>,</div></h3></section></summary><div class="impl-items"><details class="toggle" open><summary><section id="associatedtype.Error-1" class="associatedtype trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.84.1/src/core/convert/mod.rs.html#809">Source</a><a href="#associatedtype.Error-1" class="anchor">§</a><h4 class="code-header">type <a href="https://doc.rust-lang.org/1.84.1/core/convert/trait.TryFrom.html#associatedtype.Error" class="associatedtype">Error</a> = <a class="enum" href="https://doc.rust-lang.org/1.84.1/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/1.84.1/src/core/convert/mod.rs.html#812">Source</a><a href="#method.try_from" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.84.1/core/convert/trait.TryFrom.html#tymethod.try_from" class="fn">try_from</a>(value: U) -> <a class="enum" href="https://doc.rust-lang.org/1.84.1/core/result/enum.Result.html" title="enum core::result::Result">Result</a><T, <T as <a class="trait" href="https://doc.rust-lang.org/1.84.1/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><U>>::<a class="associatedtype" href="https://doc.rust-lang.org/1.84.1/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a>></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/1.84.1/src/core/convert/mod.rs.html#790-792">Source</a><a href="#impl-TryInto%3CU%3E-for-T" class="anchor">§</a><h3 class="code-header">impl<T, U> <a class="trait" href="https://doc.rust-lang.org/1.84.1/core/convert/trait.TryInto.html" title="trait core::convert::TryInto">TryInto</a><U> for T<div class="where">where
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U: <a class="trait" href="https://doc.rust-lang.org/1.84.1/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><T>,</div></h3></section></summary><div class="impl-items"><details class="toggle" open><summary><section id="associatedtype.Error" class="associatedtype trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.84.1/src/core/convert/mod.rs.html#794">Source</a><a href="#associatedtype.Error" class="anchor">§</a><h4 class="code-header">type <a href="https://doc.rust-lang.org/1.84.1/core/convert/trait.TryInto.html#associatedtype.Error" class="associatedtype">Error</a> = <U as <a class="trait" href="https://doc.rust-lang.org/1.84.1/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><T>>::<a class="associatedtype" href="https://doc.rust-lang.org/1.84.1/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/1.84.1/src/core/convert/mod.rs.html#797">Source</a><a href="#method.try_into" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.84.1/core/convert/trait.TryInto.html#tymethod.try_into" class="fn">try_into</a>(self) -> <a class="enum" href="https://doc.rust-lang.org/1.84.1/core/result/enum.Result.html" title="enum core::result::Result">Result</a><U, <U as <a class="trait" href="https://doc.rust-lang.org/1.84.1/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><T>>::<a class="associatedtype" href="https://doc.rust-lang.org/1.84.1/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a>></h4></section></summary><div class='docblock'>Performs the conversion.</div></details></div></details></div></section></div></main></body></html> |