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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="Source of the Rust file `/home/sangenya/.cargo/registry/src/github.com-1ecc6299db9ec823/rayon-1.5.1/src/lib.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>lib.rs - source</title><link rel="stylesheet" type="text/css" href="../../normalize.css"><link rel="stylesheet" type="text/css" href="../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../../light.css"  id="themeStyle"><link rel="stylesheet" type="text/css" href="../../dark.css" disabled ><link rel="stylesheet" type="text/css" href="../../ayu.css" disabled ><script id="default-settings"></script><script src="../../storage.js"></script><script src="../../crates.js"></script><noscript><link rel="stylesheet" href="../../noscript.css"></noscript><link rel="icon" type="image/svg+xml" href="../../favicon.svg">
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<link rel="alternate icon" type="image/png" href="../../favicon-32x32.png"><style type="text/css">#crate-search{background-image:url("../../down-arrow.svg");}</style></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"><div class="sidebar-menu" role="button">&#9776;</div><a href='../../rayon/index.html'><div class='logo-container rust-logo'><img src='../../rust-logo.png' alt='logo'></div></a></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!" aria-haspopup="menu" title="themes"><img src="../../brush.svg" width="18" height="18" alt="Pick another theme!"></button><div id="theme-choices" role="menu"></div></div><nav class="sub"><form class="search-form"><div class="search-container"><div><select id="crate-search"><option value="All crates">All crates</option></select><input class="search-input" name="search" disabled autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"></div><button type="button" id="help-button" title="help">?</button><a id="settings-menu" href="../../settings.html" title="settings"><img src="../../wheel.svg" width="18" height="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><div class="example-wrap"><pre class="line-numbers"><span id="1">  1</span>
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</pre><pre class="rust">
<span class="attribute">#![<span class="ident">doc</span>(<span class="ident">html_root_url</span> <span class="op">=</span> <span class="string">&quot;https://docs.rs/rayon/1.5&quot;</span>)]</span>
<span class="attribute">#![<span class="ident">deny</span>(<span class="ident">missing_debug_implementations</span>)]</span>
<span class="attribute">#![<span class="ident">deny</span>(<span class="ident">missing_docs</span>)]</span>
<span class="attribute">#![<span class="ident">deny</span>(<span class="ident">unreachable_pub</span>)]</span>
<span class="attribute">#![<span class="ident">warn</span>(<span class="ident">rust_2018_idioms</span>)]</span>

<span class="doccomment">//! Data-parallelism library that makes it easy to convert sequential</span>
<span class="doccomment">//! computations into parallel</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! Rayon is lightweight and convenient for introducing parallelism into existing</span>
<span class="doccomment">//! code. It guarantees data-race free executions and takes advantage of</span>
<span class="doccomment">//! parallelism when sensible, based on work-load at runtime.</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! # How to use Rayon</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! There are two ways to use Rayon:</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! - **High-level parallel constructs** are the simplest way to use Rayon and also</span>
<span class="doccomment">//!   typically the most efficient.</span>
<span class="doccomment">//!   - [Parallel iterators][iter module] make it easy to convert a sequential iterator to</span>
<span class="doccomment">//!     execute in parallel.</span>
<span class="doccomment">//!     - The [`ParallelIterator`] trait defines general methods for all parallel iterators.</span>
<span class="doccomment">//!     - The [`IndexedParallelIterator`] trait adds methods for iterators that support random</span>
<span class="doccomment">//!       access.</span>
<span class="doccomment">//!   - The [`par_sort`] method sorts `&amp;mut [T]` slices (or vectors) in parallel.</span>
<span class="doccomment">//!   - [`par_extend`] can be used to efficiently grow collections with items produced</span>
<span class="doccomment">//!     by a parallel iterator.</span>
<span class="doccomment">//! - **Custom tasks** let you divide your work into parallel tasks yourself.</span>
<span class="doccomment">//!   - [`join`] is used to subdivide a task into two pieces.</span>
<span class="doccomment">//!   - [`scope`] creates a scope within which you can create any number of parallel tasks.</span>
<span class="doccomment">//!   - [`ThreadPoolBuilder`] can be used to create your own thread pools or customize</span>
<span class="doccomment">//!     the global one.</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! [iter module]: iter/index.html</span>
<span class="doccomment">//! [`join`]: fn.join.html</span>
<span class="doccomment">//! [`scope`]: fn.scope.html</span>
<span class="doccomment">//! [`par_sort`]: slice/trait.ParallelSliceMut.html#method.par_sort</span>
<span class="doccomment">//! [`par_extend`]: iter/trait.ParallelExtend.html#tymethod.par_extend</span>
<span class="doccomment">//! [`ThreadPoolBuilder`]: struct.ThreadPoolBuilder.html</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! # Basic usage and the Rayon prelude</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! First, you will need to add `rayon` to your `Cargo.toml`.</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! Next, to use parallel iterators or the other high-level methods,</span>
<span class="doccomment">//! you need to import several traits. Those traits are bundled into</span>
<span class="doccomment">//! the module [`rayon::prelude`]. It is recommended that you import</span>
<span class="doccomment">//! all of these traits at once by adding `use rayon::prelude::*` at</span>
<span class="doccomment">//! the top of each module that uses Rayon methods.</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! These traits give you access to the `par_iter` method which provides</span>
<span class="doccomment">//! parallel implementations of many iterative functions such as [`map`],</span>
<span class="doccomment">//! [`for_each`], [`filter`], [`fold`], and [more].</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! [`rayon::prelude`]: prelude/index.html</span>
<span class="doccomment">//! [`map`]: iter/trait.ParallelIterator.html#method.map</span>
<span class="doccomment">//! [`for_each`]: iter/trait.ParallelIterator.html#method.for_each</span>
<span class="doccomment">//! [`filter`]: iter/trait.ParallelIterator.html#method.filter</span>
<span class="doccomment">//! [`fold`]: iter/trait.ParallelIterator.html#method.fold</span>
<span class="doccomment">//! [more]: iter/trait.ParallelIterator.html#provided-methods</span>
<span class="doccomment">//! [`ParallelIterator`]: iter/trait.ParallelIterator.html</span>
<span class="doccomment">//! [`IndexedParallelIterator`]: iter/trait.IndexedParallelIterator.html</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! # Crate Layout</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! Rayon extends many of the types found in the standard library with</span>
<span class="doccomment">//! parallel iterator implementations. The modules in the `rayon`</span>
<span class="doccomment">//! crate mirror [`std`] itself: so, e.g., the `option` module in</span>
<span class="doccomment">//! Rayon contains parallel iterators for the `Option` type, which is</span>
<span class="doccomment">//! found in [the `option` module of `std`]. Similarly, the</span>
<span class="doccomment">//! `collections` module in Rayon offers parallel iterator types for</span>
<span class="doccomment">//! [the `collections` from `std`]. You will rarely need to access</span>
<span class="doccomment">//! these submodules unless you need to name iterator types</span>
<span class="doccomment">//! explicitly.</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! [the `option` module of `std`]: https://doc.rust-lang.org/std/option/index.html</span>
<span class="doccomment">//! [the `collections` from `std`]: https://doc.rust-lang.org/std/collections/index.html</span>
<span class="doccomment">//! [`std`]: https://doc.rust-lang.org/std/</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! # Other questions?</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! See [the Rayon FAQ][faq].</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! [faq]: https://github.com/rayon-rs/rayon/blob/master/FAQ.md</span>

<span class="attribute">#[<span class="ident">macro_use</span>]</span>
<span class="kw">mod</span> <span class="ident">delegate</span>;

<span class="attribute">#[<span class="ident">macro_use</span>]</span>
<span class="kw">mod</span> <span class="ident">private</span>;

<span class="kw">mod</span> <span class="ident">split_producer</span>;

<span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">array</span>;
<span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">collections</span>;
<span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">iter</span>;
<span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">option</span>;
<span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">prelude</span>;
<span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">range</span>;
<span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">range_inclusive</span>;
<span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">result</span>;
<span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">slice</span>;
<span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">str</span>;
<span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">string</span>;
<span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">vec</span>;

<span class="kw">mod</span> <span class="ident">math</span>;
<span class="kw">mod</span> <span class="ident">par_either</span>;

<span class="kw">mod</span> <span class="ident">compile_fail</span>;

<span class="kw">pub</span> <span class="kw">use</span> <span class="ident">rayon_core::FnContext</span>;
<span class="kw">pub</span> <span class="kw">use</span> <span class="ident">rayon_core::ThreadBuilder</span>;
<span class="kw">pub</span> <span class="kw">use</span> <span class="ident">rayon_core::ThreadPool</span>;
<span class="kw">pub</span> <span class="kw">use</span> <span class="ident">rayon_core::ThreadPoolBuildError</span>;
<span class="kw">pub</span> <span class="kw">use</span> <span class="ident">rayon_core::ThreadPoolBuilder</span>;
<span class="kw">pub</span> <span class="kw">use</span> <span class="ident">rayon_core</span>::{<span class="ident">current_num_threads</span>, <span class="ident">current_thread_index</span>};
<span class="kw">pub</span> <span class="kw">use</span> <span class="ident">rayon_core</span>::{<span class="ident">in_place_scope</span>, <span class="ident">scope</span>, <span class="ident">Scope</span>};
<span class="kw">pub</span> <span class="kw">use</span> <span class="ident">rayon_core</span>::{<span class="ident">in_place_scope_fifo</span>, <span class="ident">scope_fifo</span>, <span class="ident">ScopeFifo</span>};
<span class="kw">pub</span> <span class="kw">use</span> <span class="ident">rayon_core</span>::{<span class="ident">join</span>, <span class="ident">join_context</span>};
<span class="kw">pub</span> <span class="kw">use</span> <span class="ident">rayon_core</span>::{<span class="ident">spawn</span>, <span class="ident">spawn_fifo</span>};
</pre></div>
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