<!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 to the Rust file `/home/mrh/.cargo/registry/src/github.com-1ecc6299db9ec823/rayon-1.1.0/src/collections/hash_map.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>hash_map.rs.html -- 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="../../../dark.css"><link rel="stylesheet" type="text/css" href="../../../light.css" id="themeStyle"><script src="../../../storage.js"></script><noscript><link rel="stylesheet" href="../../../noscript.css"></noscript><link rel="shortcut icon" href="../../../favicon.ico"><style type="text/css">#crate-search{background-image:url("../../../down-arrow.svg");}</style></head><body class="rustdoc source"><!--[if lte IE 8]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu">☰</div><a href='../../../rayon/index.html'><div class='logo-container'><img src='../../../rust-logo.png' alt='logo'></div></a></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!"><img src="../../../brush.svg" width="18" alt="Pick another theme!"></button><div id="theme-choices"></div></div><script src="../../../theme.js"></script><nav class="sub"><form class="search-form js-only"><div class="search-container"><div><select id="crate-search"><option value="All crates">All crates</option></select><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"></div><a id="settings-menu" href="../../../settings.html"><img src="../../../wheel.svg" width="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><pre class="line-numbers"><span id="1"> 1</span> <span id="2"> 2</span> <span id="3"> 3</span> <span id="4"> 4</span> <span id="5"> 5</span> <span id="6"> 6</span> <span id="7"> 7</span> <span id="8"> 8</span> <span id="9"> 9</span> <span id="10">10</span> <span id="11">11</span> <span id="12">12</span> <span id="13">13</span> <span id="14">14</span> <span id="15">15</span> <span id="16">16</span> <span id="17">17</span> <span id="18">18</span> <span id="19">19</span> <span id="20">20</span> <span id="21">21</span> <span id="22">22</span> <span id="23">23</span> <span id="24">24</span> <span id="25">25</span> <span id="26">26</span> <span id="27">27</span> <span id="28">28</span> <span id="29">29</span> <span id="30">30</span> <span id="31">31</span> <span id="32">32</span> <span id="33">33</span> <span id="34">34</span> <span id="35">35</span> <span id="36">36</span> <span id="37">37</span> <span id="38">38</span> <span id="39">39</span> <span id="40">40</span> <span id="41">41</span> <span id="42">42</span> <span id="43">43</span> <span id="44">44</span> <span id="45">45</span> <span id="46">46</span> <span id="47">47</span> <span id="48">48</span> <span id="49">49</span> <span id="50">50</span> <span id="51">51</span> <span id="52">52</span> <span id="53">53</span> <span id="54">54</span> <span id="55">55</span> <span id="56">56</span> <span id="57">57</span> <span id="58">58</span> <span id="59">59</span> <span id="60">60</span> <span id="61">61</span> <span id="62">62</span> <span id="63">63</span> <span id="64">64</span> <span id="65">65</span> <span id="66">66</span> <span id="67">67</span> </pre><div class="example-wrap"><pre class="rust "> <span class="doccomment">//! This module contains the parallel iterator types for hash maps</span> <span class="doccomment">//! (`HashMap<K, V>`). You will rarely need to interact with it directly</span> <span class="doccomment">//! unless you have need to name one of the iterator types.</span> <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">collections</span>::<span class="ident">HashMap</span>; <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">hash</span>::{<span class="ident">BuildHasher</span>, <span class="ident">Hash</span>}; <span class="kw">use</span> <span class="ident">iter</span>::<span class="ident">plumbing</span>::<span class="kw-2">*</span>; <span class="kw">use</span> <span class="ident">iter</span>::<span class="kw-2">*</span>; <span class="kw">use</span> <span class="ident">vec</span>; <span class="doccomment">/// Parallel iterator over a hash map</span> <span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Debug</span>)]</span> <span class="comment">// std doesn't Clone</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">IntoIter</span><span class="op"><</span><span class="ident">K</span>: <span class="ident">Hash</span> <span class="op">+</span> <span class="ident">Eq</span> <span class="op">+</span> <span class="ident">Send</span>, <span class="ident">V</span>: <span class="ident">Send</span><span class="op">></span> { <span class="ident">inner</span>: <span class="ident">vec</span>::<span class="ident">IntoIter</span><span class="op"><</span>(<span class="ident">K</span>, <span class="ident">V</span>)<span class="op">></span>, } <span class="macro">into_par_vec</span><span class="macro">!</span> { <span class="ident">HashMap</span><span class="op"><</span><span class="ident">K</span>, <span class="ident">V</span>, <span class="ident">S</span><span class="op">></span> <span class="op">=</span><span class="op">></span> <span class="ident">IntoIter</span><span class="op"><</span><span class="ident">K</span>, <span class="ident">V</span><span class="op">></span>, <span class="kw">impl</span><span class="op"><</span><span class="ident">K</span>: <span class="ident">Hash</span> <span class="op">+</span> <span class="ident">Eq</span> <span class="op">+</span> <span class="ident">Send</span>, <span class="ident">V</span>: <span class="ident">Send</span>, <span class="ident">S</span>: <span class="ident">BuildHasher</span><span class="op">></span> } <span class="macro">delegate_iterator</span><span class="macro">!</span> { <span class="ident">IntoIter</span><span class="op"><</span><span class="ident">K</span>, <span class="ident">V</span><span class="op">></span> <span class="op">=</span><span class="op">></span> (<span class="ident">K</span>, <span class="ident">V</span>), <span class="kw">impl</span><span class="op"><</span><span class="ident">K</span>: <span class="ident">Hash</span> <span class="op">+</span> <span class="ident">Eq</span> <span class="op">+</span> <span class="ident">Send</span>, <span class="ident">V</span>: <span class="ident">Send</span><span class="op">></span> } <span class="doccomment">/// Parallel iterator over an immutable reference to a hash map</span> <span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Debug</span>)]</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Iter</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">K</span>: <span class="ident">Hash</span> <span class="op">+</span> <span class="ident">Eq</span> <span class="op">+</span> <span class="ident">Sync</span> <span class="op">+</span> <span class="lifetime">'a</span>, <span class="ident">V</span>: <span class="ident">Sync</span> <span class="op">+</span> <span class="lifetime">'a</span><span class="op">></span> { <span class="ident">inner</span>: <span class="ident">vec</span>::<span class="ident">IntoIter</span><span class="op"><</span>(<span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">K</span>, <span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">V</span>)<span class="op">></span>, } <span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">K</span>: <span class="ident">Hash</span> <span class="op">+</span> <span class="ident">Eq</span> <span class="op">+</span> <span class="ident">Sync</span>, <span class="ident">V</span>: <span class="ident">Sync</span><span class="op">></span> <span class="ident">Clone</span> <span class="kw">for</span> <span class="ident">Iter</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">K</span>, <span class="ident">V</span><span class="op">></span> { <span class="kw">fn</span> <span class="ident">clone</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="self">Self</span> { <span class="ident">Iter</span> { <span class="ident">inner</span>: <span class="self">self</span>.<span class="ident">inner</span>.<span class="ident">clone</span>(), } } } <span class="macro">into_par_vec</span><span class="macro">!</span> { <span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">HashMap</span><span class="op"><</span><span class="ident">K</span>, <span class="ident">V</span>, <span class="ident">S</span><span class="op">></span> <span class="op">=</span><span class="op">></span> <span class="ident">Iter</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">K</span>, <span class="ident">V</span><span class="op">></span>, <span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">K</span>: <span class="ident">Hash</span> <span class="op">+</span> <span class="ident">Eq</span> <span class="op">+</span> <span class="ident">Sync</span>, <span class="ident">V</span>: <span class="ident">Sync</span>, <span class="ident">S</span>: <span class="ident">BuildHasher</span><span class="op">></span> } <span class="macro">delegate_iterator</span><span class="macro">!</span> { <span class="ident">Iter</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">K</span>, <span class="ident">V</span><span class="op">></span> <span class="op">=</span><span class="op">></span> (<span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">K</span>, <span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">V</span>), <span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">K</span>: <span class="ident">Hash</span> <span class="op">+</span> <span class="ident">Eq</span> <span class="op">+</span> <span class="ident">Sync</span> <span class="op">+</span> <span class="lifetime">'a</span>, <span class="ident">V</span>: <span class="ident">Sync</span> <span class="op">+</span> <span class="lifetime">'a</span><span class="op">></span> } <span class="doccomment">/// Parallel iterator over a mutable reference to a hash map</span> <span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Debug</span>)]</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">IterMut</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">K</span>: <span class="ident">Hash</span> <span class="op">+</span> <span class="ident">Eq</span> <span class="op">+</span> <span class="ident">Sync</span> <span class="op">+</span> <span class="lifetime">'a</span>, <span class="ident">V</span>: <span class="ident">Send</span> <span class="op">+</span> <span class="lifetime">'a</span><span class="op">></span> { <span class="ident">inner</span>: <span class="ident">vec</span>::<span class="ident">IntoIter</span><span class="op"><</span>(<span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">K</span>, <span class="kw-2">&</span><span class="lifetime">'a</span> <span class="kw-2">mut</span> <span class="ident">V</span>)<span class="op">></span>, } <span class="macro">into_par_vec</span><span class="macro">!</span> { <span class="kw-2">&</span><span class="lifetime">'a</span> <span class="kw-2">mut</span> <span class="ident">HashMap</span><span class="op"><</span><span class="ident">K</span>, <span class="ident">V</span>, <span class="ident">S</span><span class="op">></span> <span class="op">=</span><span class="op">></span> <span class="ident">IterMut</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">K</span>, <span class="ident">V</span><span class="op">></span>, <span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">K</span>: <span class="ident">Hash</span> <span class="op">+</span> <span class="ident">Eq</span> <span class="op">+</span> <span class="ident">Sync</span>, <span class="ident">V</span>: <span class="ident">Send</span>, <span class="ident">S</span>: <span class="ident">BuildHasher</span><span class="op">></span> } <span class="macro">delegate_iterator</span><span class="macro">!</span> { <span class="ident">IterMut</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">K</span>, <span class="ident">V</span><span class="op">></span> <span class="op">=</span><span class="op">></span> (<span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">K</span>, <span class="kw-2">&</span><span class="lifetime">'a</span> <span class="kw-2">mut</span> <span class="ident">V</span>), <span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">K</span>: <span class="ident">Hash</span> <span class="op">+</span> <span class="ident">Eq</span> <span class="op">+</span> <span class="ident">Sync</span> <span class="op">+</span> <span class="lifetime">'a</span>, <span class="ident">V</span>: <span class="ident">Send</span> <span class="op">+</span> <span class="lifetime">'a</span><span class="op">></span> } </pre></div> </section><section id="search" class="content hidden"></section><section class="footer"></section><aside id="help" class="hidden"><div><h1 class="hidden">Help</h1><div class="shortcuts"><h2>Keyboard Shortcuts</h2><dl><dt><kbd>?</kbd></dt><dd>Show this help dialog</dd><dt><kbd>S</kbd></dt><dd>Focus the search field</dd><dt><kbd>↑</kbd></dt><dd>Move up in search results</dd><dt><kbd>↓</kbd></dt><dd>Move down in search results</dd><dt><kbd>↹</kbd></dt><dd>Switch tab</dd><dt><kbd>⏎</kbd></dt><dd>Go to active search result</dd><dt><kbd>+</kbd></dt><dd>Expand all sections</dd><dt><kbd>-</kbd></dt><dd>Collapse all sections</dd></dl></div><div class="infos"><h2>Search Tricks</h2><p>Prefix searches with a type followed by a colon (e.g., <code>fn:</code>) to restrict the search to a given type.</p><p>Accepted types are: <code>fn</code>, 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