| <!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="Source of the Rust file `/root/.cargo/git/checkouts/rayon-3b3b152053499ede/a07ce2e/src/iter/try_reduce.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>try_reduce.rs - source</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceSerif4-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../FiraSans-Regular.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../FiraSans-Medium.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceCodePro-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceSerif4-Bold.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceCodePro-Semibold.ttf.woff2"><link rel="stylesheet" href="../../../normalize.css"><link rel="stylesheet" href="../../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" href="../../../ayu.css" disabled><link rel="stylesheet" href="../../../dark.css" disabled><link rel="stylesheet" href="../../../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../../../storage.js"></script><script defer src="../../../source-script.js"></script><script defer src="../../../source-files.js"></script><script defer src="../../../main.js"></script><noscript><link rel="stylesheet" href="../../../noscript.css"></noscript><link rel="alternate icon" type="image/png" href="../../../favicon-16x16.png"><link rel="alternate icon" type="image/png" href="../../../favicon-32x32.png"><link rel="icon" type="image/svg+xml" href="../../../favicon.svg"></head><body class="rustdoc source"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><a class="sidebar-logo" href="../../../rayon/index.html"><div class="logo-container"><img class="rust-logo" src="../../../rust-logo.svg" alt="logo"></div></a></nav><main><div class="width-limiter"><nav class="sub"><a class="sub-logo-container" href="../../../rayon/index.html"><img class="rust-logo" src="../../../rust-logo.svg" alt="logo"></a><form class="search-form"><div class="search-container"><span></span><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><div id="help-button" title="help" tabindex="-1"><a href="../../../help.html">?</a></div><div id="settings-menu" tabindex="-1"><a href="../../../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../../../wheel.svg"></a></div></div></form></nav><section id="main-content" class="content"><div class="example-wrap"><pre class="src-line-numbers"><span id="1">1</span> |
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| </pre><pre class="rust"><code><span class="kw">use </span><span class="kw">super</span>::plumbing::<span class="kw-2">*</span>; |
| <span class="kw">use </span><span class="kw">super</span>::ParallelIterator; |
| <span class="kw">use </span><span class="kw">super</span>::Try; |
| |
| <span class="kw">use </span>std::ops::ControlFlow::{<span class="self">self</span>, Break, Continue}; |
| <span class="kw">use </span>std::sync::atomic::{AtomicBool, Ordering}; |
| |
| <span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">fn </span>try_reduce<PI, R, ID, T>(pi: PI, identity: ID, reduce_op: R) -> T |
| <span class="kw">where |
| </span>PI: ParallelIterator<Item = T>, |
| R: Fn(T::Output, T::Output) -> T + Sync, |
| ID: Fn() -> T::Output + Sync, |
| T: Try + Send, |
| { |
| <span class="kw">let </span>full = AtomicBool::new(<span class="bool-val">false</span>); |
| <span class="kw">let </span>consumer = TryReduceConsumer { |
| identity: <span class="kw-2">&</span>identity, |
| reduce_op: <span class="kw-2">&</span>reduce_op, |
| full: <span class="kw-2">&</span>full, |
| }; |
| pi.drive_unindexed(consumer) |
| } |
| |
| <span class="kw">struct </span>TryReduceConsumer<<span class="lifetime">'r</span>, R, ID> { |
| identity: <span class="kw-2">&</span><span class="lifetime">'r </span>ID, |
| reduce_op: <span class="kw-2">&</span><span class="lifetime">'r </span>R, |
| full: <span class="kw-2">&</span><span class="lifetime">'r </span>AtomicBool, |
| } |
| |
| <span class="kw">impl</span><<span class="lifetime">'r</span>, R, ID> Copy <span class="kw">for </span>TryReduceConsumer<<span class="lifetime">'r</span>, R, ID> {} |
| |
| <span class="kw">impl</span><<span class="lifetime">'r</span>, R, ID> Clone <span class="kw">for </span>TryReduceConsumer<<span class="lifetime">'r</span>, R, ID> { |
| <span class="kw">fn </span>clone(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="self">Self </span>{ |
| <span class="kw-2">*</span><span class="self">self |
| </span>} |
| } |
| |
| <span class="kw">impl</span><<span class="lifetime">'r</span>, R, ID, T> Consumer<T> <span class="kw">for </span>TryReduceConsumer<<span class="lifetime">'r</span>, R, ID> |
| <span class="kw">where |
| </span>R: Fn(T::Output, T::Output) -> T + Sync, |
| ID: Fn() -> T::Output + Sync, |
| T: Try + Send, |
| { |
| <span class="kw">type </span>Folder = TryReduceFolder<<span class="lifetime">'r</span>, R, T>; |
| <span class="kw">type </span>Reducer = <span class="self">Self</span>; |
| <span class="kw">type </span><span class="prelude-ty">Result </span>= T; |
| |
| <span class="kw">fn </span>split_at(<span class="self">self</span>, _index: usize) -> (<span class="self">Self</span>, <span class="self">Self</span>, <span class="self">Self</span>) { |
| (<span class="self">self</span>, <span class="self">self</span>, <span class="self">self</span>) |
| } |
| |
| <span class="kw">fn </span>into_folder(<span class="self">self</span>) -> <span class="self">Self</span>::Folder { |
| TryReduceFolder { |
| reduce_op: <span class="self">self</span>.reduce_op, |
| control: Continue((<span class="self">self</span>.identity)()), |
| full: <span class="self">self</span>.full, |
| } |
| } |
| |
| <span class="kw">fn </span>full(<span class="kw-2">&</span><span class="self">self</span>) -> bool { |
| <span class="self">self</span>.full.load(Ordering::Relaxed) |
| } |
| } |
| |
| <span class="kw">impl</span><<span class="lifetime">'r</span>, R, ID, T> UnindexedConsumer<T> <span class="kw">for </span>TryReduceConsumer<<span class="lifetime">'r</span>, R, ID> |
| <span class="kw">where |
| </span>R: Fn(T::Output, T::Output) -> T + Sync, |
| ID: Fn() -> T::Output + Sync, |
| T: Try + Send, |
| { |
| <span class="kw">fn </span>split_off_left(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="self">Self </span>{ |
| <span class="kw-2">*</span><span class="self">self |
| </span>} |
| |
| <span class="kw">fn </span>to_reducer(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="self">Self</span>::Reducer { |
| <span class="kw-2">*</span><span class="self">self |
| </span>} |
| } |
| |
| <span class="kw">impl</span><<span class="lifetime">'r</span>, R, ID, T> Reducer<T> <span class="kw">for </span>TryReduceConsumer<<span class="lifetime">'r</span>, R, ID> |
| <span class="kw">where |
| </span>R: Fn(T::Output, T::Output) -> T + Sync, |
| T: Try, |
| { |
| <span class="kw">fn </span>reduce(<span class="self">self</span>, left: T, right: T) -> T { |
| <span class="kw">match </span>(left.branch(), right.branch()) { |
| (Continue(left), Continue(right)) => (<span class="self">self</span>.reduce_op)(left, right), |
| (Break(r), <span class="kw">_</span>) | (<span class="kw">_</span>, Break(r)) => T::from_residual(r), |
| } |
| } |
| } |
| |
| <span class="kw">struct </span>TryReduceFolder<<span class="lifetime">'r</span>, R, T: Try> { |
| reduce_op: <span class="kw-2">&</span><span class="lifetime">'r </span>R, |
| control: ControlFlow<T::Residual, T::Output>, |
| full: <span class="kw-2">&</span><span class="lifetime">'r </span>AtomicBool, |
| } |
| |
| <span class="kw">impl</span><<span class="lifetime">'r</span>, R, T> Folder<T> <span class="kw">for </span>TryReduceFolder<<span class="lifetime">'r</span>, R, T> |
| <span class="kw">where |
| </span>R: Fn(T::Output, T::Output) -> T, |
| T: Try, |
| { |
| <span class="kw">type </span><span class="prelude-ty">Result </span>= T; |
| |
| <span class="kw">fn </span>consume(<span class="kw-2">mut </span><span class="self">self</span>, item: T) -> <span class="self">Self </span>{ |
| <span class="kw">let </span>reduce_op = <span class="self">self</span>.reduce_op; |
| <span class="self">self</span>.control = <span class="kw">match </span>(<span class="self">self</span>.control, item.branch()) { |
| (Continue(left), Continue(right)) => reduce_op(left, right).branch(), |
| (control @ Break(<span class="kw">_</span>), <span class="kw">_</span>) | (<span class="kw">_</span>, control @ Break(<span class="kw">_</span>)) => control, |
| }; |
| <span class="kw">if let </span>Break(<span class="kw">_</span>) = <span class="self">self</span>.control { |
| <span class="self">self</span>.full.store(<span class="bool-val">true</span>, Ordering::Relaxed); |
| } |
| <span class="self">self |
| </span>} |
| |
| <span class="kw">fn </span>complete(<span class="self">self</span>) -> T { |
| <span class="kw">match </span><span class="self">self</span>.control { |
| Continue(c) => T::from_output(c), |
| Break(r) => T::from_residual(r), |
| } |
| } |
| |
| <span class="kw">fn </span>full(<span class="kw-2">&</span><span class="self">self</span>) -> bool { |
| <span class="kw">match </span><span class="self">self</span>.control { |
| Break(<span class="kw">_</span>) => <span class="bool-val">true</span>, |
| <span class="kw">_ </span>=> <span class="self">self</span>.full.load(Ordering::Relaxed), |
| } |
| } |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../../" data-current-crate="rayon" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |