<!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 `C:\Users\Chrilieb\.cargo\registry\src\github.com-1ecc6299db9ec823\odds-0.2.25\src\vec.rs`.">
<meta name="keywords" content="rust, rustlang, rust-lang">
<title>vec.rs.html -- source</title>
<link rel="stylesheet" type="text/css" href="../../normalize.css">
<link rel="stylesheet" type="text/css" href="../../rustdoc.css">
<link rel="stylesheet" type="text/css" href="../../main.css">
</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">
</nav>
<nav class="sub">
<form class="search-form js-only">
<div class="search-container">
<input class="search-input" name="search"
autocomplete="off"
placeholder="Click or press ‘S’ to search, ‘?’ for more options…"
type="search">
</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>
<span id="204">204</span>
<span id="205">205</span>
<span id="206">206</span>
<span id="207">207</span>
<span id="208">208</span>
<span id="209">209</span>
<span id="210">210</span>
<span id="211">211</span>
<span id="212">212</span>
<span id="213">213</span>
<span id="214">214</span>
<span id="215">215</span>
</pre><pre class="rust ">
<span class="doccomment">//! Extensions to `Vec`</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! Requires `feature="std"`</span>
<span class="attribute">#<span class="op">!</span>[<span class="ident">cfg</span>(<span class="ident">feature</span><span class="op">=</span><span class="string">"std"</span>)]</span>
<span class="kw">use</span> <span class="ident">range</span>::<span class="ident">IndexRange</span>;
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">ptr</span>;
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">slice</span>;
<span class="kw">use</span> <span class="ident">slice</span>::<span class="ident">SliceFind</span>;
<span class="doccomment">/// Create a new vec from the iterable</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">vec</span><span class="op"><</span><span class="ident">I</span><span class="op">></span>(<span class="ident">iterable</span>: <span class="ident">I</span>) <span class="op">-></span> <span class="ident">Vec</span><span class="op"><</span><span class="ident">I</span>::<span class="ident">Item</span><span class="op">></span>
<span class="kw">where</span> <span class="ident">I</span>: <span class="ident">IntoIterator</span>
{
<span class="ident">iterable</span>.<span class="ident">into_iter</span>().<span class="ident">collect</span>()
}
<span class="doccomment">/// Extra methods for `Vec<T>`</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Requires `feature="std"`</span>
<span class="kw">pub</span> <span class="kw">trait</span> <span class="ident">VecExt</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {
<span class="doccomment">/// Remove elements in a range, and insert from an iterator in their place.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// The removed and inserted ranges don't have to match in length.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// **Panics** if range `r` is out of bounds.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// **Panics** if iterator `iter` is not of exact length.</span>
<span class="kw">fn</span> <span class="ident">splice</span><span class="op"><</span><span class="ident">R</span>, <span class="ident">I</span><span class="op">></span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">r</span>: <span class="ident">R</span>, <span class="ident">iter</span>: <span class="ident">I</span>)
<span class="kw">where</span> <span class="ident">I</span>: <span class="ident">IntoIterator</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="ident">I</span>::<span class="ident">IntoIter</span>: <span class="ident">ExactSizeIterator</span>,
<span class="ident">R</span>: <span class="ident">IndexRange</span>;
<span class="doccomment">/// Retains only the elements specified by the predicate.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// In other words, remove all elements `e` such that `f(&mut e)` returns false.</span>
<span class="doccomment">/// This method operates in place and preserves the order of the retained</span>
<span class="doccomment">/// elements.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use odds::vec::VecExt;</span>
<span class="doccomment">/// let mut vec = vec![1, 2, 3, 4];</span>
<span class="doccomment">/// vec.retain_mut(|x| {</span>
<span class="doccomment">/// let keep = *x % 2 == 0;</span>
<span class="doccomment">/// *x *= 10;</span>
<span class="doccomment">/// keep</span>
<span class="doccomment">/// });</span>
<span class="doccomment">/// assert_eq!(vec, [20, 40]);</span>
<span class="doccomment">/// ```</span>
<span class="kw">fn</span> <span class="ident">retain_mut</span><span class="op"><</span><span class="ident">F</span><span class="op">></span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">f</span>: <span class="ident">F</span>)
<span class="kw">where</span> <span class="ident">F</span>: <span class="ident">FnMut</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">T</span>) <span class="op">-></span> <span class="ident">bool</span>;
}
<span class="doccomment">/// `Vec::splice`: Remove elements in a range, and insert from an iterator</span>
<span class="doccomment">/// in their place.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// The removed and inserted ranges don't have to match in length.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// **Panics** if range `r` is out of bounds.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// **Panics** if iterator `iter` is not of exact length.</span>
<span class="kw">impl</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="ident">VecExt</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="kw">for</span> <span class="ident">Vec</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {
<span class="kw">fn</span> <span class="ident">splice</span><span class="op"><</span><span class="ident">R</span>, <span class="ident">I</span><span class="op">></span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">r</span>: <span class="ident">R</span>, <span class="ident">iter</span>: <span class="ident">I</span>)
<span class="kw">where</span> <span class="ident">I</span>: <span class="ident">IntoIterator</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="ident">I</span>::<span class="ident">IntoIter</span>: <span class="ident">ExactSizeIterator</span>,
<span class="ident">R</span>: <span class="ident">IndexRange</span>,
{
<span class="kw">let</span> <span class="ident">v</span> <span class="op">=</span> <span class="self">self</span>;
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">iter</span> <span class="op">=</span> <span class="ident">iter</span>.<span class="ident">into_iter</span>();
<span class="kw">let</span> (<span class="ident">input_len</span>, _) <span class="op">=</span> <span class="ident">iter</span>.<span class="ident">size_hint</span>();
<span class="kw">let</span> <span class="ident">old_len</span> <span class="op">=</span> <span class="ident">v</span>.<span class="ident">len</span>();
<span class="kw">let</span> <span class="ident">r</span> <span class="op">=</span> <span class="ident">r</span>.<span class="ident">start</span>().<span class="ident">unwrap_or</span>(<span class="number">0</span>)..<span class="ident">r</span>.<span class="ident">end</span>().<span class="ident">unwrap_or</span>(<span class="ident">old_len</span>);
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">r</span>.<span class="ident">start</span> <span class="op"><=</span> <span class="ident">r</span>.<span class="ident">end</span>);
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">r</span>.<span class="ident">end</span> <span class="op"><=</span> <span class="ident">v</span>.<span class="ident">len</span>());
<span class="kw">let</span> <span class="ident">rm_len</span> <span class="op">=</span> <span class="ident">r</span>.<span class="ident">end</span> <span class="op">-</span> <span class="ident">r</span>.<span class="ident">start</span>;
<span class="ident">v</span>.<span class="ident">reserve</span>(<span class="ident">input_len</span>.<span class="ident">saturating_sub</span>(<span class="ident">rm_len</span>));
<span class="kw">unsafe</span> {
<span class="kw">let</span> <span class="ident">ptr</span> <span class="op">=</span> <span class="ident">v</span>.<span class="ident">as_mut_ptr</span>();
<span class="ident">v</span>.<span class="ident">set_len</span>(<span class="ident">r</span>.<span class="ident">start</span>);
<span class="comment">// drop all elements in `r`</span>
{
<span class="kw">let</span> <span class="ident">mslc</span> <span class="op">=</span> <span class="ident">slice</span>::<span class="ident">from_raw_parts_mut</span>(<span class="ident">ptr</span>.<span class="ident">offset</span>(<span class="ident">r</span>.<span class="ident">start</span> <span class="kw">as</span> <span class="ident">isize</span>), <span class="ident">rm_len</span>);
<span class="kw">for</span> <span class="ident">elt_ptr</span> <span class="kw">in</span> <span class="ident">mslc</span> {
<span class="ident">ptr</span>::<span class="ident">read</span>(<span class="ident">elt_ptr</span>); <span class="comment">// Possible panic</span>
}
}
<span class="kw">if</span> <span class="ident">rm_len</span> <span class="op">!=</span> <span class="ident">input_len</span> {
<span class="comment">// move tail elements</span>
<span class="ident">ptr</span>::<span class="ident">copy</span>(<span class="ident">ptr</span>.<span class="ident">offset</span>(<span class="ident">r</span>.<span class="ident">end</span> <span class="kw">as</span> <span class="ident">isize</span>),
<span class="ident">ptr</span>.<span class="ident">offset</span>((<span class="ident">r</span>.<span class="ident">start</span> <span class="op">+</span> <span class="ident">input_len</span>) <span class="kw">as</span> <span class="ident">isize</span>),
<span class="ident">old_len</span> <span class="op">-</span> <span class="ident">r</span>.<span class="ident">end</span>);
}
<span class="comment">// fill in elements from the iterator</span>
<span class="comment">// FIXME: On panic, drop tail properly too (using panic guard)</span>
{
<span class="kw">let</span> <span class="ident">grow_slc</span> <span class="op">=</span> <span class="ident">slice</span>::<span class="ident">from_raw_parts_mut</span>(<span class="ident">ptr</span>.<span class="ident">offset</span>(<span class="ident">r</span>.<span class="ident">start</span> <span class="kw">as</span> <span class="ident">isize</span>), <span class="ident">input_len</span>);
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">len</span> <span class="op">=</span> <span class="ident">r</span>.<span class="ident">start</span>;
<span class="kw">for</span> <span class="ident">slot_ptr</span> <span class="kw">in</span> <span class="ident">grow_slc</span> {
<span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">input_elt</span>) <span class="op">=</span> <span class="ident">iter</span>.<span class="ident">next</span>() { <span class="comment">// Possible Panic</span>
<span class="ident">ptr</span>::<span class="ident">write</span>(<span class="ident">slot_ptr</span>, <span class="ident">input_elt</span>);
} <span class="kw">else</span> {
<span class="comment">// FIXME: Skip check with trusted iterators</span>
<span class="macro">panic</span><span class="macro">!</span>(<span class="string">"splice: iterator too short"</span>);
}
<span class="comment">// update length to drop as much as possible on panic</span>
<span class="ident">len</span> <span class="op">+=</span> <span class="number">1</span>;
<span class="ident">v</span>.<span class="ident">set_len</span>(<span class="ident">len</span>);
}
<span class="ident">v</span>.<span class="ident">set_len</span>(<span class="ident">old_len</span> <span class="op">-</span> <span class="ident">rm_len</span> <span class="op">+</span> <span class="ident">input_len</span>);
}
}
<span class="comment">//assert!(iter.next().is_none(), "splice: iterator not exact size");</span>
}
<span class="comment">// Adapted from libcollections/vec.rs in Rust</span>
<span class="comment">// Primary author in Rust: Michael Darakananda</span>
<span class="kw">fn</span> <span class="ident">retain_mut</span><span class="op"><</span><span class="ident">F</span><span class="op">></span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="kw-2">mut</span> <span class="ident">f</span>: <span class="ident">F</span>)
<span class="kw">where</span> <span class="ident">F</span>: <span class="ident">FnMut</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">T</span>) <span class="op">-></span> <span class="ident">bool</span>
{
<span class="kw">let</span> <span class="ident">len</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">len</span>();
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">del</span> <span class="op">=</span> <span class="number">0</span>;
{
<span class="kw">let</span> <span class="ident">v</span> <span class="op">=</span> <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="kw-2">*</span><span class="kw-2">*</span><span class="self">self</span>;
<span class="kw">for</span> <span class="ident">i</span> <span class="kw">in</span> <span class="number">0</span>..<span class="ident">len</span> {
<span class="kw">if</span> <span class="op">!</span><span class="ident">f</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">v</span>[<span class="ident">i</span>]) {
<span class="ident">del</span> <span class="op">+=</span> <span class="number">1</span>;
} <span class="kw">else</span> <span class="kw">if</span> <span class="ident">del</span> <span class="op">></span> <span class="number">0</span> {
<span class="ident">v</span>.<span class="ident">swap</span>(<span class="ident">i</span> <span class="op">-</span> <span class="ident">del</span>, <span class="ident">i</span>);
}
}
}
<span class="kw">if</span> <span class="ident">del</span> <span class="op">></span> <span class="number">0</span> {
<span class="self">self</span>.<span class="ident">truncate</span>(<span class="ident">len</span> <span class="op">-</span> <span class="ident">del</span>);
}
}
}
<span class="kw">pub</span> <span class="kw">trait</span> <span class="ident">VecFindRemove</span> {
<span class="kw">type</span> <span class="ident">Item</span>;
<span class="doccomment">/// Linear search for the first element equal to `elt` and remove</span>
<span class="doccomment">/// it if found.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Return its index and the value itself.</span>
<span class="kw">fn</span> <span class="ident">find_remove</span><span class="op"><</span><span class="ident">U</span><span class="op">></span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">elt</span>: <span class="kw-2">&</span><span class="ident">U</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span>(<span class="ident">usize</span>, <span class="self">Self</span>::<span class="ident">Item</span>)<span class="op">></span>
<span class="kw">where</span> <span class="self">Self</span>::<span class="ident">Item</span>: <span class="ident">PartialEq</span><span class="op"><</span><span class="ident">U</span><span class="op">></span>;
<span class="doccomment">/// Linear search for the last element equal to `elt` and remove</span>
<span class="doccomment">/// it if found.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Return its index and the value itself.</span>
<span class="kw">fn</span> <span class="ident">rfind_remove</span><span class="op"><</span><span class="ident">U</span><span class="op">></span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">elt</span>: <span class="kw-2">&</span><span class="ident">U</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span>(<span class="ident">usize</span>, <span class="self">Self</span>::<span class="ident">Item</span>)<span class="op">></span>
<span class="kw">where</span> <span class="self">Self</span>::<span class="ident">Item</span>: <span class="ident">PartialEq</span><span class="op"><</span><span class="ident">U</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">VecFindRemove</span> <span class="kw">for</span> <span class="ident">Vec</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {
<span class="kw">type</span> <span class="ident">Item</span> <span class="op">=</span> <span class="ident">T</span>;
<span class="kw">fn</span> <span class="ident">find_remove</span><span class="op"><</span><span class="ident">U</span><span class="op">></span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">elt</span>: <span class="kw-2">&</span><span class="ident">U</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span>(<span class="ident">usize</span>, <span class="self">Self</span>::<span class="ident">Item</span>)<span class="op">></span>
<span class="kw">where</span> <span class="self">Self</span>::<span class="ident">Item</span>: <span class="ident">PartialEq</span><span class="op"><</span><span class="ident">U</span><span class="op">></span>
{
<span class="self">self</span>.<span class="ident">find</span>(<span class="ident">elt</span>).<span class="ident">map</span>(<span class="op">|</span><span class="ident">i</span><span class="op">|</span> (<span class="ident">i</span>, <span class="self">self</span>.<span class="ident">remove</span>(<span class="ident">i</span>)))
}
<span class="kw">fn</span> <span class="ident">rfind_remove</span><span class="op"><</span><span class="ident">U</span><span class="op">></span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">elt</span>: <span class="kw-2">&</span><span class="ident">U</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span>(<span class="ident">usize</span>, <span class="self">Self</span>::<span class="ident">Item</span>)<span class="op">></span>
<span class="kw">where</span> <span class="self">Self</span>::<span class="ident">Item</span>: <span class="ident">PartialEq</span><span class="op"><</span><span class="ident">U</span><span class="op">></span>
{
<span class="self">self</span>.<span class="ident">rfind</span>(<span class="ident">elt</span>).<span class="ident">map</span>(<span class="op">|</span><span class="ident">i</span><span class="op">|</span> (<span class="ident">i</span>, <span class="self">self</span>.<span class="ident">remove</span>(<span class="ident">i</span>)))
}
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_splice</span>() {
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">iter</span>::<span class="ident">once</span>;
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">v</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>, <span class="number">4</span>];
<span class="ident">v</span>.<span class="ident">splice</span>(<span class="number">1</span>..<span class="number">1</span>, <span class="macro">vec</span><span class="macro">!</span>[<span class="number">9</span>, <span class="number">9</span>]);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">v</span>, <span class="kw-2">&</span>[<span class="number">1</span>, <span class="number">9</span>, <span class="number">9</span>, <span class="number">2</span>, <span class="number">3</span>, <span class="number">4</span>]);
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">v</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>, <span class="number">4</span>];
<span class="ident">v</span>.<span class="ident">splice</span>(<span class="number">1</span>..<span class="number">2</span>, <span class="macro">vec</span><span class="macro">!</span>[<span class="number">9</span>, <span class="number">9</span>]);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">v</span>, <span class="kw-2">&</span>[<span class="number">1</span>, <span class="number">9</span>, <span class="number">9</span>, <span class="number">3</span>, <span class="number">4</span>]);
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">v</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>, <span class="number">4</span>, <span class="number">5</span>];
<span class="ident">v</span>.<span class="ident">splice</span>(<span class="number">1</span>..<span class="number">4</span>, <span class="macro">vec</span><span class="macro">!</span>[<span class="number">9</span>, <span class="number">9</span>]);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">v</span>, <span class="kw-2">&</span>[<span class="number">1</span>, <span class="number">9</span>, <span class="number">9</span>, <span class="number">5</span>]);
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">v</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>, <span class="number">4</span>];
<span class="ident">v</span>.<span class="ident">splice</span>(<span class="number">0</span>..<span class="number">4</span>, <span class="ident">once</span>(<span class="number">9</span>));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">v</span>, <span class="kw-2">&</span>[<span class="number">9</span>]);
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">v</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>, <span class="number">4</span>];
<span class="ident">v</span>.<span class="ident">splice</span>(<span class="number">0</span>..<span class="number">4</span>, <span class="prelude-val">None</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">v</span>, <span class="kw-2">&</span>[]);
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">v</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>, <span class="number">4</span>];
<span class="ident">v</span>.<span class="ident">splice</span>(<span class="number">1</span>.., <span class="prelude-val">Some</span>(<span class="number">9</span>));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">v</span>, <span class="kw-2">&</span>[<span class="number">1</span>, <span class="number">9</span>]);
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_find</span>() {
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">v</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[<span class="number">0</span>, <span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>, <span class="number">1</span>, <span class="number">2</span>, <span class="number">1</span>];
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">v</span>.<span class="ident">rfind_remove</span>(<span class="kw-2">&</span><span class="number">1</span>), <span class="prelude-val">Some</span>((<span class="number">6</span>, <span class="number">1</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">v</span>.<span class="ident">find_remove</span>(<span class="kw-2">&</span><span class="number">2</span>), <span class="prelude-val">Some</span>((<span class="number">2</span>, <span class="number">2</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">v</span>.<span class="ident">find_remove</span>(<span class="kw-2">&</span><span class="number">7</span>), <span class="prelude-val">None</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="kw-2">&</span><span class="ident">v</span>, <span class="kw-2">&</span>[<span class="number">0</span>, <span class="number">1</span>, <span class="number">3</span>, <span class="number">1</span>, <span class="number">2</span>]);
}
</pre>
</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>?</dt>
<dd>Show this help dialog</dd>
<dt>S</dt>
<dd>Focus the search field</dd>
<dt>⇤</dt>
<dd>Move up in search results</dd>
<dt>⇥</dt>
<dd>Move down in search results</dd>
<dt>⏎</dt>
<dd>Go to active search result</dd>
<dt>+</dt>
<dd>Collapse/expand 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>
</div>
</div>
</aside>
<script>
window.rootPath = "../../";
window.currentCrate = "odds";
</script>
<script src="../../jquery.js"></script>
<script src="../../main.js"></script>
<script defer src="../../search-index.js"></script>
</body>
</html>