<!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/range_inclusive.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>range_inclusive.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>
<span id="68"> 68</span>
<span id="69"> 69</span>
<span id="70"> 70</span>
<span id="71"> 71</span>
<span id="72"> 72</span>
<span id="73"> 73</span>
<span id="74"> 74</span>
<span id="75"> 75</span>
<span id="76"> 76</span>
<span id="77"> 77</span>
<span id="78"> 78</span>
<span id="79"> 79</span>
<span id="80"> 80</span>
<span id="81"> 81</span>
<span id="82"> 82</span>
<span id="83"> 83</span>
<span id="84"> 84</span>
<span id="85"> 85</span>
<span id="86"> 86</span>
<span id="87"> 87</span>
<span id="88"> 88</span>
<span id="89"> 89</span>
<span id="90"> 90</span>
<span id="91"> 91</span>
<span id="92"> 92</span>
<span id="93"> 93</span>
<span id="94"> 94</span>
<span id="95"> 95</span>
<span id="96"> 96</span>
<span id="97"> 97</span>
<span id="98"> 98</span>
<span id="99"> 99</span>
<span id="100">100</span>
<span id="101">101</span>
<span id="102">102</span>
<span id="103">103</span>
<span id="104">104</span>
<span id="105">105</span>
<span id="106">106</span>
<span id="107">107</span>
<span id="108">108</span>
<span id="109">109</span>
<span id="110">110</span>
<span id="111">111</span>
<span id="112">112</span>
<span id="113">113</span>
<span id="114">114</span>
<span id="115">115</span>
<span id="116">116</span>
<span id="117">117</span>
<span id="118">118</span>
<span id="119">119</span>
<span id="120">120</span>
<span id="121">121</span>
<span id="122">122</span>
<span id="123">123</span>
<span id="124">124</span>
<span id="125">125</span>
<span id="126">126</span>
<span id="127">127</span>
<span id="128">128</span>
<span id="129">129</span>
<span id="130">130</span>
<span id="131">131</span>
<span id="132">132</span>
<span id="133">133</span>
<span id="134">134</span>
<span id="135">135</span>
<span id="136">136</span>
<span id="137">137</span>
<span id="138">138</span>
<span id="139">139</span>
<span id="140">140</span>
<span id="141">141</span>
<span id="142">142</span>
<span id="143">143</span>
<span id="144">144</span>
<span id="145">145</span>
<span id="146">146</span>
<span id="147">147</span>
<span id="148">148</span>
<span id="149">149</span>
<span id="150">150</span>
<span id="151">151</span>
<span id="152">152</span>
<span id="153">153</span>
<span id="154">154</span>
<span id="155">155</span>
<span id="156">156</span>
<span id="157">157</span>
<span id="158">158</span>
<span id="159">159</span>
<span id="160">160</span>
<span id="161">161</span>
<span id="162">162</span>
<span id="163">163</span>
<span id="164">164</span>
<span id="165">165</span>
<span id="166">166</span>
<span id="167">167</span>
<span id="168">168</span>
<span id="169">169</span>
<span id="170">170</span>
<span id="171">171</span>
<span id="172">172</span>
<span id="173">173</span>
<span id="174">174</span>
<span id="175">175</span>
<span id="176">176</span>
<span id="177">177</span>
<span id="178">178</span>
<span id="179">179</span>
<span id="180">180</span>
<span id="181">181</span>
<span id="182">182</span>
<span id="183">183</span>
<span id="184">184</span>
<span id="185">185</span>
<span id="186">186</span>
<span id="187">187</span>
<span id="188">188</span>
<span id="189">189</span>
<span id="190">190</span>
<span id="191">191</span>
<span id="192">192</span>
<span id="193">193</span>
<span id="194">194</span>
<span id="195">195</span>
<span id="196">196</span>
<span id="197">197</span>
<span id="198">198</span>
<span id="199">199</span>
<span id="200">200</span>
<span id="201">201</span>
<span id="202">202</span>
<span id="203">203</span>
</pre><div class="example-wrap"><pre class="rust ">
<span class="doccomment">//! Parallel iterator types for [inclusive ranges][std::range],</span>
<span class="doccomment">//! the type for values created by `a..=b` expressions</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! You will rarely need to interact with this module directly unless you have</span>
<span class="doccomment">//! need to name one of the iterator types.</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! ```</span>
<span class="doccomment">//! use rayon::prelude::*;</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! let r = (0..=100u64).into_par_iter()</span>
<span class="doccomment">//! .sum();</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! // compare result with sequential calculation</span>
<span class="doccomment">//! assert_eq!((0..=100).sum::<u64>(), r);</span>
<span class="doccomment">//! ```</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! [std::range]: https://doc.rust-lang.org/core/ops/struct.RangeInclusive.html</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">std</span>::<span class="ident">ops</span>::<span class="ident">RangeInclusive</span>;
<span class="doccomment">/// Parallel iterator over an inclusive range, implemented for all integer types.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// **Note:** The `zip` operation requires `IndexedParallelIterator`</span>
<span class="doccomment">/// which is only implemented for `u8`, `i8`, `u16`, and `i16`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use rayon::prelude::*;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let p = (0..=25u16).into_par_iter()</span>
<span class="doccomment">/// .zip(0..=25u16)</span>
<span class="doccomment">/// .filter(|&(x, y)| x % 5 == 0 || y % 5 == 0)</span>
<span class="doccomment">/// .map(|(x, y)| x * y)</span>
<span class="doccomment">/// .sum::<u16>();</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let s = (0..=25u16).zip(0..=25u16)</span>
<span class="doccomment">/// .filter(|&(x, y)| x % 5 == 0 || y % 5 == 0)</span>
<span class="doccomment">/// .map(|(x, y)| x * y)</span>
<span class="doccomment">/// .sum();</span>
<span class="doccomment">///</span>
<span class="doccomment">/// assert_eq!(p, s);</span>
<span class="doccomment">/// ```</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Debug</span>, <span class="ident">Clone</span>)]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Iter</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {
<span class="ident">range</span>: <span class="ident">RangeInclusive</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>,
}
<span class="kw">impl</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="ident">Iter</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>
<span class="kw">where</span>
<span class="ident">RangeInclusive</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>: <span class="ident">Clone</span> <span class="op">+</span> <span class="ident">Iterator</span><span class="op"><</span><span class="ident">Item</span> <span class="op">=</span> <span class="ident">T</span><span class="op">></span> <span class="op">+</span> <span class="ident">DoubleEndedIterator</span>,
{
<span class="doccomment">/// Returns `Some((start, end))` for `start..=end`, or `None` if it is exhausted.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Note that `RangeInclusive` does not specify the bounds of an exhausted iterator,</span>
<span class="doccomment">/// so this is a way for us to figure out what we've got. Thankfully, all of the</span>
<span class="doccomment">/// integer types we care about can be trivially cloned.</span>
<span class="kw">fn</span> <span class="ident">bounds</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="prelude-ty">Option</span><span class="op"><</span>(<span class="ident">T</span>, <span class="ident">T</span>)<span class="op">></span> {
<span class="prelude-val">Some</span>((<span class="self">self</span>.<span class="ident">range</span>.<span class="ident">clone</span>().<span class="ident">next</span>()<span class="question-mark">?</span>, <span class="self">self</span>.<span class="ident">range</span>.<span class="ident">clone</span>().<span class="ident">next_back</span>()<span class="question-mark">?</span>))
}
}
<span class="kw">impl</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="ident">IntoParallelIterator</span> <span class="kw">for</span> <span class="ident">RangeInclusive</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>
<span class="kw">where</span>
<span class="ident">Iter</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>: <span class="ident">ParallelIterator</span>,
{
<span class="kw">type</span> <span class="ident">Item</span> <span class="op">=</span> <span class="op"><</span><span class="ident">Iter</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="kw">as</span> <span class="ident">ParallelIterator</span><span class="op">></span>::<span class="ident">Item</span>;
<span class="kw">type</span> <span class="ident">Iter</span> <span class="op">=</span> <span class="ident">Iter</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>;
<span class="kw">fn</span> <span class="ident">into_par_iter</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">Iter</span> { <span class="ident">range</span>: <span class="self">self</span> }
}
}
<span class="macro">macro_rules</span><span class="macro">!</span> <span class="ident">convert</span> {
( <span class="macro-nonterminal">$</span><span class="self">self</span>:<span class="macro-nonterminal">ident</span> . <span class="macro-nonterminal">$</span><span class="macro-nonterminal">method</span>:<span class="ident">ident</span> ( $( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">arg</span>:<span class="ident">expr</span> ),<span class="op">*</span> ) ) <span class="op">=</span><span class="op">></span> {
<span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>((<span class="ident">start</span>, <span class="ident">end</span>)) <span class="op">=</span> <span class="macro-nonterminal">$</span><span class="self">self</span>.<span class="macro-nonterminal">bounds</span>() {
<span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">end</span>) <span class="op">=</span> <span class="ident">end</span>.<span class="ident">checked_add</span>(<span class="number">1</span>) {
(<span class="ident">start</span>..<span class="ident">end</span>).<span class="ident">into_par_iter</span>().<span class="macro-nonterminal">$</span><span class="macro-nonterminal">method</span>($( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">arg</span> ),<span class="kw-2">*</span>)
} <span class="kw">else</span> {
(<span class="ident">start</span>..<span class="ident">end</span>).<span class="ident">into_par_iter</span>().<span class="ident">chain</span>(<span class="ident">once</span>(<span class="ident">end</span>)).<span class="macro-nonterminal">$</span><span class="macro-nonterminal">method</span>($( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">arg</span> ),<span class="kw-2">*</span>)
}
} <span class="kw">else</span> {
<span class="ident">empty</span>::<span class="op"><</span><span class="self">Self</span>::<span class="ident">Item</span><span class="op">></span>().<span class="macro-nonterminal">$</span><span class="macro-nonterminal">method</span>($( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">arg</span> ),<span class="kw-2">*</span>)
}
};
}
<span class="macro">macro_rules</span><span class="macro">!</span> <span class="ident">parallel_range_impl</span> {
( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span>:<span class="ident">ty</span> ) <span class="op">=</span><span class="op">></span> {
<span class="kw">impl</span> <span class="ident">ParallelIterator</span> <span class="kw">for</span> <span class="ident">Iter</span><span class="op"><</span><span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span><span class="op">></span> {
<span class="kw">type</span> <span class="ident">Item</span> <span class="op">=</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span>;
<span class="kw">fn</span> <span class="ident">drive_unindexed</span><span class="op"><</span><span class="ident">C</span><span class="op">></span>(<span class="self">self</span>, <span class="ident">consumer</span>: <span class="ident">C</span>) <span class="op">-</span><span class="op">></span> <span class="ident">C</span>::<span class="prelude-ty">Result</span>
<span class="kw">where</span>
<span class="ident">C</span>: <span class="ident">UnindexedConsumer</span><span class="op"><</span><span class="self">Self</span>::<span class="ident">Item</span><span class="op">></span>,
{
<span class="macro">convert</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">drive_unindexed</span>(<span class="ident">consumer</span>))
}
<span class="kw">fn</span> <span class="ident">opt_len</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">usize</span><span class="op">></span> {
<span class="macro">convert</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">opt_len</span>())
}
}
};
}
<span class="macro">macro_rules</span><span class="macro">!</span> <span class="ident">indexed_range_impl</span> {
( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span>:<span class="ident">ty</span> ) <span class="op">=</span><span class="op">></span> {
<span class="macro">parallel_range_impl</span><span class="macro">!</span> { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span> }
<span class="kw">impl</span> <span class="ident">IndexedParallelIterator</span> <span class="kw">for</span> <span class="ident">Iter</span><span class="op"><</span><span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span><span class="op">></span> {
<span class="kw">fn</span> <span class="ident">drive</span><span class="op"><</span><span class="ident">C</span><span class="op">></span>(<span class="self">self</span>, <span class="ident">consumer</span>: <span class="ident">C</span>) <span class="op">-</span><span class="op">></span> <span class="ident">C</span>::<span class="prelude-ty">Result</span>
<span class="kw">where</span>
<span class="ident">C</span>: <span class="ident">Consumer</span><span class="op"><</span><span class="self">Self</span>::<span class="ident">Item</span><span class="op">></span>,
{
<span class="macro">convert</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">drive</span>(<span class="ident">consumer</span>))
}
<span class="kw">fn</span> <span class="ident">len</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="ident">usize</span> {
<span class="self">self</span>.<span class="ident">range</span>.<span class="ident">len</span>()
}
<span class="kw">fn</span> <span class="ident">with_producer</span><span class="op"><</span><span class="ident">CB</span><span class="op">></span>(<span class="self">self</span>, <span class="ident">callback</span>: <span class="ident">CB</span>) <span class="op">-</span><span class="op">></span> <span class="ident">CB</span>::<span class="ident">Output</span>
<span class="kw">where</span>
<span class="ident">CB</span>: <span class="ident">ProducerCallback</span><span class="op"><</span><span class="self">Self</span>::<span class="ident">Item</span><span class="op">></span>,
{
<span class="macro">convert</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">with_producer</span>(<span class="ident">callback</span>))
}
}
};
}
<span class="comment">// all RangeInclusive<T> with ExactSizeIterator</span>
<span class="macro">indexed_range_impl</span><span class="macro">!</span> {<span class="ident">u8</span>}
<span class="macro">indexed_range_impl</span><span class="macro">!</span> {<span class="ident">u16</span>}
<span class="macro">indexed_range_impl</span><span class="macro">!</span> {<span class="ident">i8</span>}
<span class="macro">indexed_range_impl</span><span class="macro">!</span> {<span class="ident">i16</span>}
<span class="comment">// other RangeInclusive<T> with just Iterator</span>
<span class="macro">parallel_range_impl</span><span class="macro">!</span> {<span class="ident">usize</span>}
<span class="macro">parallel_range_impl</span><span class="macro">!</span> {<span class="ident">isize</span>}
<span class="macro">parallel_range_impl</span><span class="macro">!</span> {<span class="ident">u32</span>}
<span class="macro">parallel_range_impl</span><span class="macro">!</span> {<span class="ident">i32</span>}
<span class="macro">parallel_range_impl</span><span class="macro">!</span> {<span class="ident">u64</span>}
<span class="macro">parallel_range_impl</span><span class="macro">!</span> {<span class="ident">i64</span>}
<span class="macro">parallel_range_impl</span><span class="macro">!</span> {<span class="ident">u128</span>}
<span class="macro">parallel_range_impl</span><span class="macro">!</span> {<span class="ident">i128</span>}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">target_pointer_width</span> <span class="op">=</span> <span class="string">"64"</span>)]</span>
<span class="kw">fn</span> <span class="ident">test_u32_opt_len</span>() {
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">u32</span>;
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="prelude-val">Some</span>(<span class="number">101</span>), (<span class="number">0</span>..<span class="op">=</span><span class="number">100u32</span>).<span class="ident">into_par_iter</span>().<span class="ident">opt_len</span>());
<span class="macro">assert_eq</span><span class="macro">!</span>(
<span class="prelude-val">Some</span>(<span class="ident">u32</span>::<span class="ident">MAX</span> <span class="kw">as</span> <span class="ident">usize</span>),
(<span class="number">0</span>..<span class="op">=</span><span class="ident">u32</span>::<span class="ident">MAX</span> <span class="op">-</span> <span class="number">1</span>).<span class="ident">into_par_iter</span>().<span class="ident">opt_len</span>()
);
<span class="macro">assert_eq</span><span class="macro">!</span>(
<span class="prelude-val">Some</span>(<span class="ident">u32</span>::<span class="ident">MAX</span> <span class="kw">as</span> <span class="ident">usize</span> <span class="op">+</span> <span class="number">1</span>),
(<span class="number">0</span>..<span class="op">=</span><span class="ident">u32</span>::<span class="ident">MAX</span>).<span class="ident">into_par_iter</span>().<span class="ident">opt_len</span>()
);
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_u64_opt_len</span>() {
<span class="kw">use</span> <span class="ident">std</span>::{<span class="ident">u64</span>, <span class="ident">usize</span>};
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="prelude-val">Some</span>(<span class="number">101</span>), (<span class="number">0</span>..<span class="op">=</span><span class="number">100u64</span>).<span class="ident">into_par_iter</span>().<span class="ident">opt_len</span>());
<span class="macro">assert_eq</span><span class="macro">!</span>(
<span class="prelude-val">Some</span>(<span class="ident">usize</span>::<span class="ident">MAX</span>),
(<span class="number">0</span>..<span class="op">=</span><span class="ident">usize</span>::<span class="ident">MAX</span> <span class="kw">as</span> <span class="ident">u64</span> <span class="op">-</span> <span class="number">1</span>).<span class="ident">into_par_iter</span>().<span class="ident">opt_len</span>()
);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="prelude-val">None</span>, (<span class="number">0</span>..<span class="op">=</span><span class="ident">usize</span>::<span class="ident">MAX</span> <span class="kw">as</span> <span class="ident">u64</span>).<span class="ident">into_par_iter</span>().<span class="ident">opt_len</span>());
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="prelude-val">None</span>, (<span class="number">0</span>..<span class="op">=</span><span class="ident">u64</span>::<span class="ident">MAX</span>).<span class="ident">into_par_iter</span>().<span class="ident">opt_len</span>());
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_u128_opt_len</span>() {
<span class="kw">use</span> <span class="ident">std</span>::{<span class="ident">u128</span>, <span class="ident">usize</span>};
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="prelude-val">Some</span>(<span class="number">101</span>), (<span class="number">0</span>..<span class="op">=</span><span class="number">100u128</span>).<span class="ident">into_par_iter</span>().<span class="ident">opt_len</span>());
<span class="macro">assert_eq</span><span class="macro">!</span>(
<span class="prelude-val">Some</span>(<span class="ident">usize</span>::<span class="ident">MAX</span>),
(<span class="number">0</span>..<span class="op">=</span><span class="ident">usize</span>::<span class="ident">MAX</span> <span class="kw">as</span> <span class="ident">u128</span> <span class="op">-</span> <span class="number">1</span>).<span class="ident">into_par_iter</span>().<span class="ident">opt_len</span>()
);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="prelude-val">None</span>, (<span class="number">0</span>..<span class="op">=</span><span class="ident">usize</span>::<span class="ident">MAX</span> <span class="kw">as</span> <span class="ident">u128</span>).<span class="ident">into_par_iter</span>().<span class="ident">opt_len</span>());
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="prelude-val">None</span>, (<span class="number">0</span>..<span class="op">=</span><span class="ident">u128</span>::<span class="ident">MAX</span>).<span class="ident">into_par_iter</span>().<span class="ident">opt_len</span>());
}
<span class="comment">// `usize as i64` can overflow, so make sure to wrap it appropriately</span>
<span class="comment">// when using the `opt_len` "indexed" mode.</span>
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">target_pointer_width</span> <span class="op">=</span> <span class="string">"64"</span>)]</span>
<span class="kw">fn</span> <span class="ident">test_usize_i64_overflow</span>() {
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">i64</span>;
<span class="kw">use</span> <span class="ident">ThreadPoolBuilder</span>;
<span class="kw">let</span> <span class="ident">iter</span> <span class="op">=</span> (<span class="op">-</span><span class="number">2</span>..<span class="op">=</span><span class="ident">i64</span>::<span class="ident">MAX</span>).<span class="ident">into_par_iter</span>();
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">iter</span>.<span class="ident">opt_len</span>(), <span class="prelude-val">Some</span>(<span class="ident">i64</span>::<span class="ident">MAX</span> <span class="kw">as</span> <span class="ident">usize</span> <span class="op">+</span> <span class="number">3</span>));
<span class="comment">// always run with multiple threads to split into, or this will take forever...</span>
<span class="kw">let</span> <span class="ident">pool</span> <span class="op">=</span> <span class="ident">ThreadPoolBuilder</span>::<span class="ident">new</span>().<span class="ident">num_threads</span>(<span class="number">8</span>).<span class="ident">build</span>().<span class="ident">unwrap</span>();
<span class="ident">pool</span>.<span class="ident">install</span>(<span class="op">|</span><span class="op">|</span> <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">iter</span>.<span class="ident">find_last</span>(<span class="op">|</span><span class="kw">_</span><span class="op">|</span> <span class="bool-val">true</span>), <span class="prelude-val">Some</span>(<span class="ident">i64</span>::<span class="ident">MAX</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>, <code>mod</code>, <code>struct</code>, <code>enum</code>, <code>trait</code>, <code>type</code>, <code>macro</code>, and <code>const</code>.</p><p>Search functions by type signature (e.g., <code>vec -> usize</code> or <code>* -> vec</code>)</p><p>Search multiple things at once by splitting your query with comma (e.g., <code>str,u8</code> or <code>String,struct:Vec,test</code>)</p></div></div></aside><script>window.rootPath = "../../";window.currentCrate = "rayon";</script><script src="../../aliases.js"></script><script src="../../main.js"></script><script src="../../source-script.js"></script><script src="../../source-files.js"></script><script defer src="../../search-index.js"></script></body></html>