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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="A hash set implemented as a `HashMap` where the value is `()`."><title>HashSet in hashbrown - Rust</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../static.files/SourceSerif4-Regular-46f98efaafac5295.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../static.files/FiraSans-Regular-018c141bf0843ffd.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../static.files/FiraSans-Medium-8f9a781e4970d388.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../static.files/SourceCodePro-Regular-562dcc5011b6de7d.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../static.files/SourceCodePro-Semibold-d899c5a5c4aeb14a.ttf.woff2"><link rel="stylesheet" href="../static.files/normalize-76eba96aa4d2e634.css"><link rel="stylesheet" href="../static.files/rustdoc-ac92e1bbe349e143.css"><meta name="rustdoc-vars" data-root-path="../" data-static-root-path="../static.files/" data-current-crate="hashbrown" data-themes="" data-resource-suffix="" data-rustdoc-version="1.76.0 (07dca489a 2024-02-04)" data-channel="1.76.0" data-search-js="search-2b6ce74ff89ae146.js" data-settings-js="settings-4313503d2e1961c2.js" ><script src="../static.files/storage-f2adc0d6ca4d09fb.js"></script><script defer src="sidebar-items.js"></script><script defer src="../static.files/main-305769736d49e732.js"></script><noscript><link rel="stylesheet" href="../static.files/noscript-feafe1bb7466e4bd.css"></noscript><link rel="alternate icon" type="image/png" href="../static.files/favicon-16x16-8b506e7a72182f1c.png"><link rel="alternate icon" type="image/png" href="../static.files/favicon-32x32-422f7d1d52889060.png"><link rel="icon" type="image/svg+xml" href="../static.files/favicon-2c020d218678b618.svg"></head><body class="rustdoc struct"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="mobile-topbar"><button class="sidebar-menu-toggle">☰</button></nav><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../hashbrown/index.html">hashbrown</a><span class="version">0.14.3</span></h2></div><h2 class="location"><a href="#">HashSet</a></h2><div class="sidebar-elems"><section><h3><a href="#implementations">Methods</a></h3><ul class="block method"><li><a href="#method.allocator">allocator</a></li><li><a href="#method.capacity">capacity</a></li><li><a href="#method.clear">clear</a></li><li><a href="#method.contains">contains</a></li><li><a href="#method.difference">difference</a></li><li><a href="#method.drain">drain</a></li><li><a href="#method.entry">entry</a></li><li><a href="#method.extract_if">extract_if</a></li><li><a href="#method.get">get</a></li><li><a href="#method.get_or_insert">get_or_insert</a></li><li><a href="#method.get_or_insert_owned">get_or_insert_owned</a></li><li><a href="#method.get_or_insert_with">get_or_insert_with</a></li><li><a href="#method.hasher">hasher</a></li><li><a href="#method.insert">insert</a></li><li><a href="#method.insert_unique_unchecked">insert_unique_unchecked</a></li><li><a href="#method.intersection">intersection</a></li><li><a href="#method.is_disjoint">is_disjoint</a></li><li><a href="#method.is_empty">is_empty</a></li><li><a href="#method.is_subset">is_subset</a></li><li><a href="#method.is_superset">is_superset</a></li><li><a href="#method.iter">iter</a></li><li><a href="#method.len">len</a></li><li><a href="#method.raw_table">raw_table</a></li><li><a href="#method.raw_table_mut">raw_table_mut</a></li><li><a href="#method.remove">remove</a></li><li><a href="#method.replace">replace</a></li><li><a href="#method.reserve">reserve</a></li><li><a href="#method.retain">retain</a></li><li><a href="#method.shrink_to">shrink_to</a></li><li><a href="#method.shrink_to_fit">shrink_to_fit</a></li><li><a href="#method.symm
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<main><div class="width-limiter"><nav class="sub"><form class="search-form"><span></span><div id="sidebar-button" tabindex="-1"><a href="../hashbrown/all.html" title="show sidebar"></a></div><input class="search-input" name="search" aria-label="Run search in the documentation" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><div id="help-button" tabindex="-1"><a href="../help.html" title="help">?</a></div><div id="settings-menu" tabindex="-1"><a href="../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../static.files/wheel-7b819b6101059cd0.svg"></a></div></form></nav><section id="main-content" class="content"><div class="main-heading"><h1>Struct <a href="index.html">hashbrown</a>::<wbr><a class="struct" href="#">HashSet</a><button id="copy-path" title="Copy item path to clipboard"><img src="../static.files/clipboard-7571035ce49a181d.svg" width="19" height="18" alt="Copy item path"></button></h1><span class="out-of-band"><a class="src" href="../src/hashbrown/set.rs.html#115-117">source</a> · <button id="toggle-all-docs" title="collapse all docs">[<span>−</span>]</button></span></div><pre class="rust item-decl"><code>pub struct HashSet<T, S = <a class="enum" href="hash_map/enum.DefaultHashBuilder.html" title="enum hashbrown::hash_map::DefaultHashBuilder">DefaultHashBuilder</a>, A: Allocator = Global> { <span class="comment">/* private fields */</span> }</code></pre><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>A hash set implemented as a <code>HashMap</code> where the value is <code>()</code>.</p>
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<p>As with the <a href="struct.HashMap.html"><code>HashMap</code></a> type, a <code>HashSet</code> requires that the elements
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implement the <a href="https://doc.rust-lang.org/std/cmp/trait.Eq.html"><code>Eq</code></a> and <a href="https://doc.rust-lang.org/std/hash/trait.Hash.html"><code>Hash</code></a> traits. This can frequently be achieved by
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using <code>#[derive(PartialEq, Eq, Hash)]</code>. If you implement these yourself,
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it is important that the following property holds:</p>
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<div class="example-wrap"><pre class="language-text"><code>k1 == k2 -> hash(k1) == hash(k2)
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</code></pre></div>
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<p>In other words, if two keys are equal, their hashes must be equal.</p>
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<p>It is a logic error for an item to be modified in such a way that the
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item’s hash, as determined by the <a href="https://doc.rust-lang.org/std/hash/trait.Hash.html"><code>Hash</code></a> trait, or its equality, as
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determined by the <a href="https://doc.rust-lang.org/std/cmp/trait.Eq.html"><code>Eq</code></a> trait, changes while it is in the set. This is
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normally only possible through <a href="https://doc.rust-lang.org/std/cell/struct.Cell.html"><code>Cell</code></a>, <a href="https://doc.rust-lang.org/std/cell/struct.RefCell.html"><code>RefCell</code></a>, global state, I/O, or
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unsafe code.</p>
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<p>It is also a logic error for the <a href="https://doc.rust-lang.org/std/hash/trait.Hash.html"><code>Hash</code></a> implementation of a key to panic.
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This is generally only possible if the trait is implemented manually. If a
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panic does occur then the contents of the <code>HashSet</code> may become corrupted and
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some items may be dropped from the table.</p>
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<h2 id="examples"><a href="#examples">Examples</a></h2>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>hashbrown::HashSet;
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<span class="comment">// Type inference lets us omit an explicit type signature (which
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// would be `HashSet<String>` in this example).
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</span><span class="kw">let </span><span class="kw-2">mut </span>books = HashSet::new();
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<span class="comment">// Add some books.
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</span>books.insert(<span class="string">"A Dance With Dragons"</span>.to_string());
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books.insert(<span class="string">"To Kill a Mockingbird"</span>.to_string());
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books.insert(<span class="string">"The Odyssey"</span>.to_string());
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books.insert(<span class="string">"The Great Gatsby"</span>.to_string());
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<span class="comment">// Check for a specific one.
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</span><span class="kw">if </span>!books.contains(<span class="string">"The Winds of Winter"</span>) {
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<span class="macro">println!</span>(<span class="string">"We have {} books, but The Winds of Winter ain't one."</span>,
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books.len());
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}
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<span class="comment">// Remove a book.
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</span>books.remove(<span class="string">"The Odyssey"</span>);
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<span class="comment">// Iterate over everything.
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</span><span class="kw">for </span>book <span class="kw">in </span><span class="kw-2">&</span>books {
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<span class="macro">println!</span>(<span class="string">"{}"</span>, book);
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}</code></pre></div>
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<p>The easiest way to use <code>HashSet</code> with a custom type is to derive
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<a href="https://doc.rust-lang.org/std/cmp/trait.Eq.html"><code>Eq</code></a> and <a href="https://doc.rust-lang.org/std/hash/trait.Hash.html"><code>Hash</code></a>. We must also derive <a href="https://doc.rust-lang.org/std/cmp/trait.PartialEq.html"><code>PartialEq</code></a>. This will in the
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future be implied by <a href="https://doc.rust-lang.org/std/cmp/trait.Eq.html"><code>Eq</code></a>.</p>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>hashbrown::HashSet;
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<span class="attr">#[derive(Hash, Eq, PartialEq, Debug)]
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</span><span class="kw">struct </span>Viking {
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name: String,
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power: usize,
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}
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<span class="kw">let </span><span class="kw-2">mut </span>vikings = HashSet::new();
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vikings.insert(Viking { name: <span class="string">"Einar"</span>.to_string(), power: <span class="number">9 </span>});
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vikings.insert(Viking { name: <span class="string">"Einar"</span>.to_string(), power: <span class="number">9 </span>});
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vikings.insert(Viking { name: <span class="string">"Olaf"</span>.to_string(), power: <span class="number">4 </span>});
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vikings.insert(Viking { name: <span class="string">"Harald"</span>.to_string(), power: <span class="number">8 </span>});
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<span class="comment">// Use derived implementation to print the vikings.
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</span><span class="kw">for </span>x <span class="kw">in </span><span class="kw-2">&</span>vikings {
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<span class="macro">println!</span>(<span class="string">"{:?}"</span>, x);
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}</code></pre></div>
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<p>A <code>HashSet</code> with fixed list of elements can be initialized from an array:</p>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>hashbrown::HashSet;
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<span class="kw">let </span>viking_names: HashSet<<span class="kw-2">&</span><span class="lifetime">'static </span>str> =
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[ <span class="string">"Einar"</span>, <span class="string">"Olaf"</span>, <span class="string">"Harald" </span>].iter().cloned().collect();
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<span class="comment">// use the values stored in the set</span></code></pre></div>
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</div></details><h2 id="implementations" class="section-header">Implementations<a href="#implementations" class="anchor">§</a></h2><div id="implementations-list"><details class="toggle implementors-toggle" open><summary><section id="impl-HashSet%3CT,+S,+A%3E" class="impl"><a class="src rightside" href="../src/hashbrown/set.rs.html#259-434">source</a><a href="#impl-HashSet%3CT,+S,+A%3E" class="anchor">§</a><h3 class="code-header">impl<T, S, A: Allocator> <a class="struct" href="hash_set/struct.HashSet.html" title="struct hashbrown::hash_set::HashSet">HashSet</a><T, S, A></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.capacity" class="method"><a class="src rightside" href="../src/hashbrown/set.rs.html#270-272">source</a><h4 class="code-header">pub fn <a href="#method.capacity" class="fn">capacity</a>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/1.76.0/core/primitive.usize.html">usize</a></h4></section></summary><div class="docblock"><p>Returns the number of elements the set can hold without reallocating.</p>
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<h5 id="examples-1"><a href="#examples-1">Examples</a></h5>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>hashbrown::HashSet;
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<span class="kw">let </span>set: HashSet<i32> = HashSet::with_capacity(<span class="number">100</span>);
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<span class="macro">assert!</span>(set.capacity() >= <span class="number">100</span>);</code></pre></div>
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</div></details><details class="toggle method-toggle" open><summary><section id="method.iter" class="method"><a class="src rightside" href="../src/hashbrown/set.rs.html#291-295">source</a><h4 class="code-header">pub fn <a href="#method.iter" class="fn">iter</a>(&self) -> <a class="struct" href="hash_set/struct.Iter.html" title="struct hashbrown::hash_set::Iter">Iter</a><'_, T> <a href="#" class="tooltip" data-notable-ty="Iter<'_, T>">ⓘ</a></h4></section></summary><div class="docblock"><p>An iterator visiting all elements in arbitrary order.
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The iterator element type is <code>&'a T</code>.</p>
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<h5 id="examples-2"><a href="#examples-2">Examples</a></h5>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>hashbrown::HashSet;
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<span class="kw">let </span><span class="kw-2">mut </span>set = HashSet::new();
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set.insert(<span class="string">"a"</span>);
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set.insert(<span class="string">"b"</span>);
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<span class="comment">// Will print in an arbitrary order.
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</span><span class="kw">for </span>x <span class="kw">in </span>set.iter() {
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<span class="macro">println!</span>(<span class="string">"{}"</span>, x);
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}</code></pre></div>
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</div></details><details class="toggle method-toggle" open><summary><section id="method.len" class="method"><a class="src rightside" href="../src/hashbrown/set.rs.html#310-312">source</a><h4 class="code-header">pub fn <a href="#method.len" class="fn">len</a>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/1.76.0/core/primitive.usize.html">usize</a></h4></section></summary><div class="docblock"><p>Returns the number of elements in the set.</p>
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<h5 id="examples-3"><a href="#examples-3">Examples</a></h5>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>hashbrown::HashSet;
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<span class="kw">let </span><span class="kw-2">mut </span>v = HashSet::new();
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<span class="macro">assert_eq!</span>(v.len(), <span class="number">0</span>);
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v.insert(<span class="number">1</span>);
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<span class="macro">assert_eq!</span>(v.len(), <span class="number">1</span>);</code></pre></div>
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</div></details><details class="toggle method-toggle" open><summary><section id="method.is_empty" class="method"><a class="src rightside" href="../src/hashbrown/set.rs.html#327-329">source</a><h4 class="code-header">pub fn <a href="#method.is_empty" class="fn">is_empty</a>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/1.76.0/core/primitive.bool.html">bool</a></h4></section></summary><div class="docblock"><p>Returns <code>true</code> if the set contains no elements.</p>
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<h5 id="examples-4"><a href="#examples-4">Examples</a></h5>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>hashbrown::HashSet;
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<span class="kw">let </span><span class="kw-2">mut </span>v = HashSet::new();
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<span class="macro">assert!</span>(v.is_empty());
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v.insert(<span class="number">1</span>);
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<span class="macro">assert!</span>(!v.is_empty());</code></pre></div>
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</div></details><details class="toggle method-toggle" open><summary><section id="method.drain" class="method"><a class="src rightside" href="../src/hashbrown/set.rs.html#349-353">source</a><h4 class="code-header">pub fn <a href="#method.drain" class="fn">drain</a>(&mut self) -> <a class="struct" href="hash_set/struct.Drain.html" title="struct hashbrown::hash_set::Drain">Drain</a><'_, T, A> <a href="#" class="tooltip" data-notable-ty="Drain<'_, T, A>">ⓘ</a></h4></section></summary><div class="docblock"><p>Clears the set, returning all elements in an iterator.</p>
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<h5 id="examples-5"><a href="#examples-5">Examples</a></h5>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>hashbrown::HashSet;
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<span class="kw">let </span><span class="kw-2">mut </span>set: HashSet<<span class="kw">_</span>> = [<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>].iter().cloned().collect();
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<span class="macro">assert!</span>(!set.is_empty());
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<span class="comment">// print 1, 2, 3 in an arbitrary order
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</span><span class="kw">for </span>i <span class="kw">in </span>set.drain() {
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<span class="macro">println!</span>(<span class="string">"{}"</span>, i);
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}
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<span class="macro">assert!</span>(set.is_empty());</code></pre></div>
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</div></details><details class="toggle method-toggle" open><summary><section id="method.retain" class="method"><a class="src rightside" href="../src/hashbrown/set.rs.html#369-374">source</a><h4 class="code-header">pub fn <a href="#method.retain" class="fn">retain</a><F>(&mut self, f: F)<div class="where">where
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F: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(<a class="primitive" href="https://doc.rust-lang.org/1.76.0/core/primitive.reference.html">&T</a>) -> <a class="primitive" href="https://doc.rust-lang.org/1.76.0/core/primitive.bool.html">bool</a>,</div></h4></section></summary><div class="docblock"><p>Retains only the elements specified by the predicate.</p>
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<p>In other words, remove all elements <code>e</code> such that <code>f(&e)</code> returns <code>false</code>.</p>
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<h5 id="examples-6"><a href="#examples-6">Examples</a></h5>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>hashbrown::HashSet;
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<span class="kw">let </span>xs = [<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="number">6</span>];
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<span class="kw">let </span><span class="kw-2">mut </span>set: HashSet<i32> = xs.iter().cloned().collect();
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set.retain(|<span class="kw-2">&</span>k| k % <span class="number">2 </span>== <span class="number">0</span>);
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<span class="macro">assert_eq!</span>(set.len(), <span class="number">3</span>);</code></pre></div>
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|
|
</div></details><details class="toggle method-toggle" open><summary><section id="method.extract_if" class="method"><a class="src rightside" href="../src/hashbrown/set.rs.html#405-416">source</a><h4 class="code-header">pub fn <a href="#method.extract_if" class="fn">extract_if</a><F>(&mut self, f: F) -> <a class="struct" href="hash_set/struct.ExtractIf.html" title="struct hashbrown::hash_set::ExtractIf">ExtractIf</a><'_, T, F, A> <a href="#" class="tooltip" data-notable-ty="ExtractIf<'_, T, F, A>">ⓘ</a><div class="where">where
|
|||
|
|
F: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(<a class="primitive" href="https://doc.rust-lang.org/1.76.0/core/primitive.reference.html">&T</a>) -> <a class="primitive" href="https://doc.rust-lang.org/1.76.0/core/primitive.bool.html">bool</a>,</div></h4></section></summary><div class="docblock"><p>Drains elements which are true under the given predicate,
|
|||
|
|
and returns an iterator over the removed items.</p>
|
|||
|
|
<p>In other words, move all elements <code>e</code> such that <code>f(&e)</code> returns <code>true</code> out
|
|||
|
|
into another iterator.</p>
|
|||
|
|
<p>If the returned <code>ExtractIf</code> is not exhausted, e.g. because it is dropped without iterating
|
|||
|
|
or the iteration short-circuits, then the remaining elements will be retained.
|
|||
|
|
Use <a href="hash_set/struct.HashSet.html#method.retain" title="method hashbrown::hash_set::HashSet::retain"><code>retain()</code></a> with a negated predicate if you do not need the returned iterator.</p>
|
|||
|
|
<h5 id="examples-7"><a href="#examples-7">Examples</a></h5>
|
|||
|
|
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>hashbrown::HashSet;
|
|||
|
|
|
|||
|
|
<span class="kw">let </span><span class="kw-2">mut </span>set: HashSet<i32> = (<span class="number">0</span>..<span class="number">8</span>).collect();
|
|||
|
|
<span class="kw">let </span>drained: HashSet<i32> = set.extract_if(|v| v % <span class="number">2 </span>== <span class="number">0</span>).collect();
|
|||
|
|
|
|||
|
|
<span class="kw">let </span><span class="kw-2">mut </span>evens = drained.into_iter().collect::<Vec<<span class="kw">_</span>>>();
|
|||
|
|
<span class="kw">let </span><span class="kw-2">mut </span>odds = set.into_iter().collect::<Vec<<span class="kw">_</span>>>();
|
|||
|
|
evens.sort();
|
|||
|
|
odds.sort();
|
|||
|
|
|
|||
|
|
<span class="macro">assert_eq!</span>(evens, <span class="macro">vec!</span>[<span class="number">0</span>, <span class="number">2</span>, <span class="number">4</span>, <span class="number">6</span>]);
|
|||
|
|
<span class="macro">assert_eq!</span>(odds, <span class="macro">vec!</span>[<span class="number">1</span>, <span class="number">3</span>, <span class="number">5</span>, <span class="number">7</span>]);</code></pre></div>
|
|||
|
|
</div></details><details class="toggle method-toggle" open><summary><section id="method.clear" class="method"><a class="src rightside" href="../src/hashbrown/set.rs.html#431-433">source</a><h4 class="code-header">pub fn <a href="#method.clear" class="fn">clear</a>(&mut self)</h4></section></summary><div class="docblock"><p>Clears the set, removing all values.</p>
|
|||
|
|
<h5 id="examples-8"><a href="#examples-8">Examples</a></h5>
|
|||
|
|
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>hashbrown::HashSet;
|
|||
|
|
|
|||
|
|
<span class="kw">let </span><span class="kw-2">mut </span>v = HashSet::new();
|
|||
|
|
v.insert(<span class="number">1</span>);
|
|||
|
|
v.clear();
|
|||
|
|
<span class="macro">assert!</span>(v.is_empty());</code></pre></div>
|
|||
|
|
</div></details></div></details><details class="toggle implementors-toggle" open><summary><section id="impl-HashSet%3CT,+S%3E" class="impl"><a class="src rightside" href="../src/hashbrown/set.rs.html#436-512">source</a><a href="#impl-HashSet%3CT,+S%3E" class="anchor">§</a><h3 class="code-header">impl<T, S> <a class="struct" href="hash_set/struct.HashSet.html" title="struct hashbrown::hash_set::HashSet">HashSet</a><T, S, Global></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.with_hasher" class="method"><a class="src rightside" href="../src/hashbrown/set.rs.html#469-473">source</a><h4 class="code-header">pub const fn <a href="#method.with_hasher" class="fn">with_hasher</a>(hasher: S) -> Self</h4></section></summary><div class="docblock"><p>Creates a new empty hash set which will use the given hasher to hash
|
|||
|
|
keys.</p>
|
|||
|
|
<p>The hash set is initially created with a capacity of 0, so it will not
|
|||
|
|
allocate until it is first inserted into.</p>
|
|||
|
|
<h5 id="hashdos-resistance"><a href="#hashdos-resistance">HashDoS resistance</a></h5>
|
|||
|
|
<p>The <code>hash_builder</code> normally use a fixed key by default and that does
|
|||
|
|
not allow the <code>HashSet</code> to be protected against attacks such as <a href="https://en.wikipedia.org/wiki/Collision_attack"><code>HashDoS</code></a>.
|
|||
|
|
Users who require HashDoS resistance should explicitly use
|
|||
|
|
[<code>ahash::RandomState</code>] or <a href="https://doc.rust-lang.org/std/collections/hash_map/struct.RandomState.html"><code>std::collections::hash_map::RandomState</code></a>
|
|||
|
|
as the hasher when creating a <a href="hash_set/struct.HashSet.html" title="struct hashbrown::hash_set::HashSet"><code>HashSet</code></a>.</p>
|
|||
|
|
<p>The <code>hash_builder</code> passed should implement the <a href="https://doc.rust-lang.org/std/hash/trait.BuildHasher.html"><code>BuildHasher</code></a> trait for
|
|||
|
|
the HashSet to be useful, see its documentation for details.</p>
|
|||
|
|
<h5 id="examples-9"><a href="#examples-9">Examples</a></h5>
|
|||
|
|
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>hashbrown::HashSet;
|
|||
|
|
<span class="kw">use </span>hashbrown::hash_map::DefaultHashBuilder;
|
|||
|
|
|
|||
|
|
<span class="kw">let </span>s = DefaultHashBuilder::default();
|
|||
|
|
<span class="kw">let </span><span class="kw-2">mut </span>set = HashSet::with_hasher(s);
|
|||
|
|
set.insert(<span class="number">2</span>);</code></pre></div>
|
|||
|
|
</div></details><details class="toggle method-toggle" open><summary><section id="method.with_capacity_and_hasher" class="method"><a class="src rightside" href="../src/hashbrown/set.rs.html#507-511">source</a><h4 class="code-header">pub fn <a href="#method.with_capacity_and_hasher" class="fn">with_capacity_and_hasher</a>(capacity: <a class="primitive" href="https://doc.rust-lang.org/1.76.0/core/primitive.usize.html">usize</a>, hasher: S) -> Self</h4></section></summary><div class="docblock"><p>Creates an empty <code>HashSet</code> with the specified capacity, using
|
|||
|
|
<code>hasher</code> to hash the keys.</p>
|
|||
|
|
<p>The hash set will be able to hold at least <code>capacity</code> elements without
|
|||
|
|
reallocating. If <code>capacity</code> is 0, the hash set will not allocate.</p>
|
|||
|
|
<h5 id="hashdos-resistance-1"><a href="#hashdos-resistance-1">HashDoS resistance</a></h5>
|
|||
|
|
<p>The <code>hash_builder</code> normally use a fixed key by default and that does
|
|||
|
|
not allow the <code>HashSet</code> to be protected against attacks such as <a href="https://en.wikipedia.org/wiki/Collision_attack"><code>HashDoS</code></a>.
|
|||
|
|
Users who require HashDoS resistance should explicitly use
|
|||
|
|
[<code>ahash::RandomState</code>] or <a href="https://doc.rust-lang.org/std/collections/hash_map/struct.RandomState.html"><code>std::collections::hash_map::RandomState</code></a>
|
|||
|
|
as the hasher when creating a <a href="hash_set/struct.HashSet.html" title="struct hashbrown::hash_set::HashSet"><code>HashSet</code></a>.</p>
|
|||
|
|
<p>The <code>hash_builder</code> passed should implement the <a href="https://doc.rust-lang.org/std/hash/trait.BuildHasher.html"><code>BuildHasher</code></a> trait for
|
|||
|
|
the HashSet to be useful, see its documentation for details.</p>
|
|||
|
|
<h5 id="examples-10"><a href="#examples-10">Examples</a></h5>
|
|||
|
|
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>hashbrown::HashSet;
|
|||
|
|
<span class="kw">use </span>hashbrown::hash_map::DefaultHashBuilder;
|
|||
|
|
|
|||
|
|
<span class="kw">let </span>s = DefaultHashBuilder::default();
|
|||
|
|
<span class="kw">let </span><span class="kw-2">mut </span>set = HashSet::with_capacity_and_hasher(<span class="number">10</span>, s);
|
|||
|
|
set.insert(<span class="number">1</span>);</code></pre></div>
|
|||
|
|
</div></details></div></details><details class="toggle implementors-toggle" open><summary><section id="impl-HashSet%3CT,+S,+A%3E-1" class="impl"><a class="src rightside" href="../src/hashbrown/set.rs.html#514-618">source</a><a href="#impl-HashSet%3CT,+S,+A%3E-1" class="anchor">§</a><h3 class="code-header">impl<T, S, A> <a class="struct" href="hash_set/struct.HashSet.html" title="struct hashbrown::hash_set::HashSet">HashSet</a><T, S, A><div class="where">where
|
|||
|
|
A: Allocator,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.allocator" class="method"><a class="src rightside" href="../src/hashbrown/set.rs.html#520-522">source</a><h4 class="code-header">pub fn <a href="#method.allocator" class="fn">allocator</a>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/1.76.0/core/primitive.reference.html">&A</a></h4></section></summary><div class="docblock"><p>Returns a reference to the underlying allocator.</p>
|
|||
|
|
</div></details><details class="toggle method-toggle" open><summary><section id="method.with_hasher_in" class="method"><a class="src rightside" href="../src/hashbrown/set.rs.html#556-560">source</a><h4 class="code-header">pub const fn <a href="#method.with_hasher_in" class="fn">with_hasher_in</a>(hasher: S, alloc: A) -> Self</h4></section></summary><div class="docblock"><p>Creates a new empty hash set which will use the given hasher to hash
|
|||
|
|
keys.</p>
|
|||
|
|
<p>The hash set is initially created with a capacity of 0, so it will not
|
|||
|
|
allocate until it is first inserted into.</p>
|
|||
|
|
<h5 id="hashdos-resistance-2"><a href="#hashdos-resistance-2">HashDoS resistance</a></h5>
|
|||
|
|
<p>The <code>hash_builder</code> normally use a fixed key by default and that does
|
|||
|
|
not allow the <code>HashSet</code> to be protected against attacks such as <a href="https://en.wikipedia.org/wiki/Collision_attack"><code>HashDoS</code></a>.
|
|||
|
|
Users who require HashDoS resistance should explicitly use
|
|||
|
|
[<code>ahash::RandomState</code>] or <a href="https://doc.rust-lang.org/std/collections/hash_map/struct.RandomState.html"><code>std::collections::hash_map::RandomState</code></a>
|
|||
|
|
as the hasher when creating a <a href="hash_set/struct.HashSet.html" title="struct hashbrown::hash_set::HashSet"><code>HashSet</code></a>.</p>
|
|||
|
|
<p>The <code>hash_builder</code> passed should implement the <a href="https://doc.rust-lang.org/std/hash/trait.BuildHasher.html"><code>BuildHasher</code></a> trait for
|
|||
|
|
the HashSet to be useful, see its documentation for details.</p>
|
|||
|
|
<h5 id="examples-11"><a href="#examples-11">Examples</a></h5>
|
|||
|
|
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>hashbrown::HashSet;
|
|||
|
|
<span class="kw">use </span>hashbrown::hash_map::DefaultHashBuilder;
|
|||
|
|
|
|||
|
|
<span class="kw">let </span>s = DefaultHashBuilder::default();
|
|||
|
|
<span class="kw">let </span><span class="kw-2">mut </span>set = HashSet::with_hasher(s);
|
|||
|
|
set.insert(<span class="number">2</span>);</code></pre></div>
|
|||
|
|
</div></details><details class="toggle method-toggle" open><summary><section id="method.with_capacity_and_hasher_in" class="method"><a class="src rightside" href="../src/hashbrown/set.rs.html#594-598">source</a><h4 class="code-header">pub fn <a href="#method.with_capacity_and_hasher_in" class="fn">with_capacity_and_hasher_in</a>(capacity: <a class="primitive" href="https://doc.rust-lang.org/1.76.0/core/primitive.usize.html">usize</a>, hasher: S, alloc: A) -> Self</h4></section></summary><div class="docblock"><p>Creates an empty <code>HashSet</code> with the specified capacity, using
|
|||
|
|
<code>hasher</code> to hash the keys.</p>
|
|||
|
|
<p>The hash set will be able to hold at least <code>capacity</code> elements without
|
|||
|
|
reallocating. If <code>capacity</code> is 0, the hash set will not allocate.</p>
|
|||
|
|
<h5 id="hashdos-resistance-3"><a href="#hashdos-resistance-3">HashDoS resistance</a></h5>
|
|||
|
|
<p>The <code>hash_builder</code> normally use a fixed key by default and that does
|
|||
|
|
not allow the <code>HashSet</code> to be protected against attacks such as <a href="https://en.wikipedia.org/wiki/Collision_attack"><code>HashDoS</code></a>.
|
|||
|
|
Users who require HashDoS resistance should explicitly use
|
|||
|
|
[<code>ahash::RandomState</code>] or <a href="https://doc.rust-lang.org/std/collections/hash_map/struct.RandomState.html"><code>std::collections::hash_map::RandomState</code></a>
|
|||
|
|
as the hasher when creating a <a href="hash_set/struct.HashSet.html" title="struct hashbrown::hash_set::HashSet"><code>HashSet</code></a>.</p>
|
|||
|
|
<p>The <code>hash_builder</code> passed should implement the <a href="https://doc.rust-lang.org/std/hash/trait.BuildHasher.html"><code>BuildHasher</code></a> trait for
|
|||
|
|
the HashSet to be useful, see its documentation for details.</p>
|
|||
|
|
<h5 id="examples-12"><a href="#examples-12">Examples</a></h5>
|
|||
|
|
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>hashbrown::HashSet;
|
|||
|
|
<span class="kw">use </span>hashbrown::hash_map::DefaultHashBuilder;
|
|||
|
|
|
|||
|
|
<span class="kw">let </span>s = DefaultHashBuilder::default();
|
|||
|
|
<span class="kw">let </span><span class="kw-2">mut </span>set = HashSet::with_capacity_and_hasher(<span class="number">10</span>, s);
|
|||
|
|
set.insert(<span class="number">1</span>);</code></pre></div>
|
|||
|
|
</div></details><details class="toggle method-toggle" open><summary><section id="method.hasher" class="method"><a class="src rightside" href="../src/hashbrown/set.rs.html#615-617">source</a><h4 class="code-header">pub fn <a href="#method.hasher" class="fn">hasher</a>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/1.76.0/core/primitive.reference.html">&S</a></h4></section></summary><div class="docblock"><p>Returns a reference to the set’s <a href="https://doc.rust-lang.org/std/hash/trait.BuildHasher.html"><code>BuildHasher</code></a>.</p>
|
|||
|
|
<h5 id="examples-13"><a href="#examples-13">Examples</a></h5>
|
|||
|
|
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>hashbrown::HashSet;
|
|||
|
|
<span class="kw">use </span>hashbrown::hash_map::DefaultHashBuilder;
|
|||
|
|
|
|||
|
|
<span class="kw">let </span>hasher = DefaultHashBuilder::default();
|
|||
|
|
<span class="kw">let </span>set: HashSet<i32> = HashSet::with_hasher(hasher);
|
|||
|
|
<span class="kw">let </span>hasher: <span class="kw-2">&</span>DefaultHashBuilder = set.hasher();</code></pre></div>
|
|||
|
|
</div></details></div></details><details class="toggle implementors-toggle" open><summary><section id="impl-HashSet%3CT,+S,+A%3E-2" class="impl"><a class="src rightside" href="../src/hashbrown/set.rs.html#620-1226">source</a><a href="#impl-HashSet%3CT,+S,+A%3E-2" class="anchor">§</a><h3 class="code-header">impl<T, S, A> <a class="struct" href="hash_set/struct.HashSet.html" title="struct hashbrown::hash_set::HashSet">HashSet</a><T, S, A><div class="where">where
|
|||
|
|
T: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/cmp/trait.Eq.html" title="trait core::cmp::Eq">Eq</a> + <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/hash/trait.Hash.html" title="trait core::hash::Hash">Hash</a>,
|
|||
|
|
S: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/hash/trait.BuildHasher.html" title="trait core::hash::BuildHasher">BuildHasher</a>,
|
|||
|
|
A: Allocator,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.reserve" class="method"><a class="src rightside" href="../src/hashbrown/set.rs.html#648-650">source</a><h4 class="code-header">pub fn <a href="#method.reserve" class="fn">reserve</a>(&mut self, additional: <a class="primitive" href="https://doc.rust-lang.org/1.76.0/core/primitive.usize.html">usize</a>)</h4></section></summary><div class="docblock"><p>Reserves capacity for at least <code>additional</code> more elements to be inserted
|
|||
|
|
in the <code>HashSet</code>. The collection may reserve more space to avoid
|
|||
|
|
frequent reallocations.</p>
|
|||
|
|
<h5 id="panics"><a href="#panics">Panics</a></h5>
|
|||
|
|
<p>Panics if the new capacity exceeds <a href="https://doc.rust-lang.org/std/primitive.isize.html"><code>isize::MAX</code></a> bytes and <a href="https://doc.rust-lang.org/alloc/alloc/fn.handle_alloc_error.html"><code>abort</code></a> the program
|
|||
|
|
in case of allocation error. Use <a href="hash_set/struct.HashSet.html#method.try_reserve" title="method hashbrown::hash_set::HashSet::try_reserve"><code>try_reserve</code></a> instead
|
|||
|
|
if you want to handle memory allocation failure.</p>
|
|||
|
|
<h5 id="examples-14"><a href="#examples-14">Examples</a></h5>
|
|||
|
|
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>hashbrown::HashSet;
|
|||
|
|
<span class="kw">let </span><span class="kw-2">mut </span>set: HashSet<i32> = HashSet::new();
|
|||
|
|
set.reserve(<span class="number">10</span>);
|
|||
|
|
<span class="macro">assert!</span>(set.capacity() >= <span class="number">10</span>);</code></pre></div>
|
|||
|
|
</div></details><details class="toggle method-toggle" open><summary><section id="method.try_reserve" class="method"><a class="src rightside" href="../src/hashbrown/set.rs.html#669-671">source</a><h4 class="code-header">pub fn <a href="#method.try_reserve" class="fn">try_reserve</a>(&mut self, additional: <a class="primitive" href="https://doc.rust-lang.org/1.76.0/core/primitive.usize.html">usize</a>) -> <a class="enum" href="https://doc.rust-lang.org/1.76.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/1.76.0/core/primitive.unit.html">()</a>, <a class="enum" href="enum.TryReserveError.html" title="enum hashbrown::TryReserveError">TryReserveError</a>></h4></section></summary><div class="docblock"><p>Tries to reserve capacity for at least <code>additional</code> more elements to be inserted
|
|||
|
|
in the given <code>HashSet<K,V></code>. The collection may reserve more space to avoid
|
|||
|
|
frequent reallocations.</p>
|
|||
|
|
<h5 id="errors"><a href="#errors">Errors</a></h5>
|
|||
|
|
<p>If the capacity overflows, or the allocator reports a failure, then an error
|
|||
|
|
is returned.</p>
|
|||
|
|
<h5 id="examples-15"><a href="#examples-15">Examples</a></h5>
|
|||
|
|
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>hashbrown::HashSet;
|
|||
|
|
<span class="kw">let </span><span class="kw-2">mut </span>set: HashSet<i32> = HashSet::new();
|
|||
|
|
set.try_reserve(<span class="number">10</span>).expect(<span class="string">"why is the test harness OOMing on 10 bytes?"</span>);</code></pre></div>
|
|||
|
|
</div></details><details class="toggle method-toggle" open><summary><section id="method.shrink_to_fit" class="method"><a class="src rightside" href="../src/hashbrown/set.rs.html#690-692">source</a><h4 class="code-header">pub fn <a href="#method.shrink_to_fit" class="fn">shrink_to_fit</a>(&mut self)</h4></section></summary><div class="docblock"><p>Shrinks the capacity of the set as much as possible. It will drop
|
|||
|
|
down as much as possible while maintaining the internal rules
|
|||
|
|
and possibly leaving some space in accordance with the resize policy.</p>
|
|||
|
|
<h5 id="examples-16"><a href="#examples-16">Examples</a></h5>
|
|||
|
|
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>hashbrown::HashSet;
|
|||
|
|
|
|||
|
|
<span class="kw">let </span><span class="kw-2">mut </span>set = HashSet::with_capacity(<span class="number">100</span>);
|
|||
|
|
set.insert(<span class="number">1</span>);
|
|||
|
|
set.insert(<span class="number">2</span>);
|
|||
|
|
<span class="macro">assert!</span>(set.capacity() >= <span class="number">100</span>);
|
|||
|
|
set.shrink_to_fit();
|
|||
|
|
<span class="macro">assert!</span>(set.capacity() >= <span class="number">2</span>);</code></pre></div>
|
|||
|
|
</div></details><details class="toggle method-toggle" open><summary><section id="method.shrink_to" class="method"><a class="src rightside" href="../src/hashbrown/set.rs.html#716-718">source</a><h4 class="code-header">pub fn <a href="#method.shrink_to" class="fn">shrink_to</a>(&mut self, min_capacity: <a class="primitive" href="https://doc.rust-lang.org/1.76.0/core/primitive.usize.html">usize</a>)</h4></section></summary><div class="docblock"><p>Shrinks the capacity of the set with a lower limit. It will drop
|
|||
|
|
down no lower than the supplied limit while maintaining the internal rules
|
|||
|
|
and possibly leaving some space in accordance with the resize policy.</p>
|
|||
|
|
<p>Panics if the current capacity is smaller than the supplied
|
|||
|
|
minimum capacity.</p>
|
|||
|
|
<h5 id="examples-17"><a href="#examples-17">Examples</a></h5>
|
|||
|
|
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>hashbrown::HashSet;
|
|||
|
|
|
|||
|
|
<span class="kw">let </span><span class="kw-2">mut </span>set = HashSet::with_capacity(<span class="number">100</span>);
|
|||
|
|
set.insert(<span class="number">1</span>);
|
|||
|
|
set.insert(<span class="number">2</span>);
|
|||
|
|
<span class="macro">assert!</span>(set.capacity() >= <span class="number">100</span>);
|
|||
|
|
set.shrink_to(<span class="number">10</span>);
|
|||
|
|
<span class="macro">assert!</span>(set.capacity() >= <span class="number">10</span>);
|
|||
|
|
set.shrink_to(<span class="number">0</span>);
|
|||
|
|
<span class="macro">assert!</span>(set.capacity() >= <span class="number">2</span>);</code></pre></div>
|
|||
|
|
</div></details><details class="toggle method-toggle" open><summary><section id="method.difference" class="method"><a class="src rightside" href="../src/hashbrown/set.rs.html#744-749">source</a><h4 class="code-header">pub fn <a href="#method.difference" class="fn">difference</a><'a>(&'a self, other: <a class="primitive" href="https://doc.rust-lang.org/1.76.0/core/primitive.reference.html">&'a Self</a>) -> <a class="struct" href="hash_set/struct.Difference.html" title="struct hashbrown::hash_set::Difference">Difference</a><'a, T, S, A> <a href="#" class="tooltip" data-notable-ty="Difference<'a, T, S, A>">ⓘ</a></h4></section></summary><div class="docblock"><p>Visits the values representing the difference,
|
|||
|
|
i.e., the values that are in <code>self</code> but not in <code>other</code>.</p>
|
|||
|
|
<h5 id="examples-18"><a href="#examples-18">Examples</a></h5>
|
|||
|
|
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>hashbrown::HashSet;
|
|||
|
|
<span class="kw">let </span>a: HashSet<<span class="kw">_</span>> = [<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>].iter().cloned().collect();
|
|||
|
|
<span class="kw">let </span>b: HashSet<<span class="kw">_</span>> = [<span class="number">4</span>, <span class="number">2</span>, <span class="number">3</span>, <span class="number">4</span>].iter().cloned().collect();
|
|||
|
|
|
|||
|
|
<span class="comment">// Can be seen as `a - b`.
|
|||
|
|
</span><span class="kw">for </span>x <span class="kw">in </span>a.difference(<span class="kw-2">&</span>b) {
|
|||
|
|
<span class="macro">println!</span>(<span class="string">"{}"</span>, x); <span class="comment">// Print 1
|
|||
|
|
</span>}
|
|||
|
|
|
|||
|
|
<span class="kw">let </span>diff: HashSet<<span class="kw">_</span>> = a.difference(<span class="kw-2">&</span>b).collect();
|
|||
|
|
<span class="macro">assert_eq!</span>(diff, [<span class="number">1</span>].iter().collect());
|
|||
|
|
|
|||
|
|
<span class="comment">// Note that difference is not symmetric,
|
|||
|
|
// and `b - a` means something else:
|
|||
|
|
</span><span class="kw">let </span>diff: HashSet<<span class="kw">_</span>> = b.difference(<span class="kw-2">&</span>a).collect();
|
|||
|
|
<span class="macro">assert_eq!</span>(diff, [<span class="number">4</span>].iter().collect());</code></pre></div>
|
|||
|
|
</div></details><details class="toggle method-toggle" open><summary><section id="method.symmetric_difference" class="method"><a class="src rightside" href="../src/hashbrown/set.rs.html#773-777">source</a><h4 class="code-header">pub fn <a href="#method.symmetric_difference" class="fn">symmetric_difference</a><'a>(
|
|||
|
|
&'a self,
|
|||
|
|
other: <a class="primitive" href="https://doc.rust-lang.org/1.76.0/core/primitive.reference.html">&'a Self</a>
|
|||
|
|
) -> <a class="struct" href="hash_set/struct.SymmetricDifference.html" title="struct hashbrown::hash_set::SymmetricDifference">SymmetricDifference</a><'a, T, S, A> <a href="#" class="tooltip" data-notable-ty="SymmetricDifference<'a, T, S, A>">ⓘ</a></h4></section></summary><div class="docblock"><p>Visits the values representing the symmetric difference,
|
|||
|
|
i.e., the values that are in <code>self</code> or in <code>other</code> but not in both.</p>
|
|||
|
|
<h5 id="examples-19"><a href="#examples-19">Examples</a></h5>
|
|||
|
|
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>hashbrown::HashSet;
|
|||
|
|
<span class="kw">let </span>a: HashSet<<span class="kw">_</span>> = [<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>].iter().cloned().collect();
|
|||
|
|
<span class="kw">let </span>b: HashSet<<span class="kw">_</span>> = [<span class="number">4</span>, <span class="number">2</span>, <span class="number">3</span>, <span class="number">4</span>].iter().cloned().collect();
|
|||
|
|
|
|||
|
|
<span class="comment">// Print 1, 4 in arbitrary order.
|
|||
|
|
</span><span class="kw">for </span>x <span class="kw">in </span>a.symmetric_difference(<span class="kw-2">&</span>b) {
|
|||
|
|
<span class="macro">println!</span>(<span class="string">"{}"</span>, x);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
<span class="kw">let </span>diff1: HashSet<<span class="kw">_</span>> = a.symmetric_difference(<span class="kw-2">&</span>b).collect();
|
|||
|
|
<span class="kw">let </span>diff2: HashSet<<span class="kw">_</span>> = b.symmetric_difference(<span class="kw-2">&</span>a).collect();
|
|||
|
|
|
|||
|
|
<span class="macro">assert_eq!</span>(diff1, diff2);
|
|||
|
|
<span class="macro">assert_eq!</span>(diff1, [<span class="number">1</span>, <span class="number">4</span>].iter().collect());</code></pre></div>
|
|||
|
|
</div></details><details class="toggle method-toggle" open><summary><section id="method.intersection" class="method"><a class="src rightside" href="../src/hashbrown/set.rs.html#798-808">source</a><h4 class="code-header">pub fn <a href="#method.intersection" class="fn">intersection</a><'a>(&'a self, other: <a class="primitive" href="https://doc.rust-lang.org/1.76.0/core/primitive.reference.html">&'a Self</a>) -> <a class="struct" href="hash_set/struct.Intersection.html" title="struct hashbrown::hash_set::Intersection">Intersection</a><'a, T, S, A> <a href="#" class="tooltip" data-notable-ty="Intersection<'a, T, S, A>">ⓘ</a></h4></section></summary><div class="docblock"><p>Visits the values representing the intersection,
|
|||
|
|
i.e., the values that are both in <code>self</code> and <code>other</code>.</p>
|
|||
|
|
<h5 id="examples-20"><a href="#examples-20">Examples</a></h5>
|
|||
|
|
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>hashbrown::HashSet;
|
|||
|
|
<span class="kw">let </span>a: HashSet<<span class="kw">_</span>> = [<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>].iter().cloned().collect();
|
|||
|
|
<span class="kw">let </span>b: HashSet<<span class="kw">_</span>> = [<span class="number">4</span>, <span class="number">2</span>, <span class="number">3</span>, <span class="number">4</span>].iter().cloned().collect();
|
|||
|
|
|
|||
|
|
<span class="comment">// Print 2, 3 in arbitrary order.
|
|||
|
|
</span><span class="kw">for </span>x <span class="kw">in </span>a.intersection(<span class="kw-2">&</span>b) {
|
|||
|
|
<span class="macro">println!</span>(<span class="string">"{}"</span>, x);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
<span class="kw">let </span>intersection: HashSet<<span class="kw">_</span>> = a.intersection(<span class="kw-2">&</span>b).collect();
|
|||
|
|
<span class="macro">assert_eq!</span>(intersection, [<span class="number">2</span>, <span class="number">3</span>].iter().collect());</code></pre></div>
|
|||
|
|
</div></details><details class="toggle method-toggle" open><summary><section id="method.union" class="method"><a class="src rightside" href="../src/hashbrown/set.rs.html#829-840">source</a><h4 class="code-header">pub fn <a href="#method.union" class="fn">union</a><'a>(&'a self, other: <a class="primitive" href="https://doc.rust-lang.org/1.76.0/core/primitive.reference.html">&'a Self</a>) -> <a class="struct" href="hash_set/struct.Union.html" title="struct hashbrown::hash_set::Union">Union</a><'a, T, S, A> <a href="#" class="tooltip" data-notable-ty="Union<'a, T, S, A>">ⓘ</a></h4></section></summary><div class="docblock"><p>Visits the values representing the union,
|
|||
|
|
i.e., all the values in <code>self</code> or <code>other</code>, without duplicates.</p>
|
|||
|
|
<h5 id="examples-21"><a href="#examples-21">Examples</a></h5>
|
|||
|
|
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>hashbrown::HashSet;
|
|||
|
|
<span class="kw">let </span>a: HashSet<<span class="kw">_</span>> = [<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>].iter().cloned().collect();
|
|||
|
|
<span class="kw">let </span>b: HashSet<<span class="kw">_</span>> = [<span class="number">4</span>, <span class="number">2</span>, <span class="number">3</span>, <span class="number">4</span>].iter().cloned().collect();
|
|||
|
|
|
|||
|
|
<span class="comment">// Print 1, 2, 3, 4 in arbitrary order.
|
|||
|
|
</span><span class="kw">for </span>x <span class="kw">in </span>a.union(<span class="kw-2">&</span>b) {
|
|||
|
|
<span class="macro">println!</span>(<span class="string">"{}"</span>, x);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
<span class="kw">let union</span>: HashSet<<span class="kw">_</span>> = a.union(<span class="kw-2">&</span>b).collect();
|
|||
|
|
<span class="macro">assert_eq!</span>(union, [<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>, <span class="number">4</span>].iter().collect());</code></pre></div>
|
|||
|
|
</div></details><details class="toggle method-toggle" open><summary><section id="method.contains" class="method"><a class="src rightside" href="../src/hashbrown/set.rs.html#861-866">source</a><h4 class="code-header">pub fn <a href="#method.contains" class="fn">contains</a><Q>(&self, value: <a class="primitive" href="https://doc.rust-lang.org/1.76.0/core/primitive.reference.html">&Q</a>) -> <a class="primitive" href="https://doc.rust-lang.org/1.76.0/core/primitive.bool.html">bool</a><div class="where">where
|
|||
|
|
Q: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/hash/trait.Hash.html" title="trait core::hash::Hash">Hash</a> + <a class="trait" href="trait.Equivalent.html" title="trait hashbrown::Equivalent">Equivalent</a><T> + ?<a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</div></h4></section></summary><div class="docblock"><p>Returns <code>true</code> if the set contains a value.</p>
|
|||
|
|
<p>The value may be any borrowed form of the set’s value type, but
|
|||
|
|
<a href="https://doc.rust-lang.org/std/hash/trait.Hash.html"><code>Hash</code></a> and <a href="https://doc.rust-lang.org/std/cmp/trait.Eq.html"><code>Eq</code></a> on the borrowed form <em>must</em> match those for
|
|||
|
|
the value type.</p>
|
|||
|
|
<h5 id="examples-22"><a href="#examples-22">Examples</a></h5>
|
|||
|
|
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>hashbrown::HashSet;
|
|||
|
|
|
|||
|
|
<span class="kw">let </span>set: HashSet<<span class="kw">_</span>> = [<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>].iter().cloned().collect();
|
|||
|
|
<span class="macro">assert_eq!</span>(set.contains(<span class="kw-2">&</span><span class="number">1</span>), <span class="bool-val">true</span>);
|
|||
|
|
<span class="macro">assert_eq!</span>(set.contains(<span class="kw-2">&</span><span class="number">4</span>), <span class="bool-val">false</span>);</code></pre></div>
|
|||
|
|
</div></details><details class="toggle method-toggle" open><summary><section id="method.get" class="method"><a class="src rightside" href="../src/hashbrown/set.rs.html#887-896">source</a><h4 class="code-header">pub fn <a href="#method.get" class="fn">get</a><Q>(&self, value: <a class="primitive" href="https://doc.rust-lang.org/1.76.0/core/primitive.reference.html">&Q</a>) -> <a class="enum" href="https://doc.rust-lang.org/1.76.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><<a class="primitive" href="https://doc.rust-lang.org/1.76.0/core/primitive.reference.html">&T</a>><div class="where">where
|
|||
|
|
Q: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/hash/trait.Hash.html" title="trait core::hash::Hash">Hash</a> + <a class="trait" href="trait.Equivalent.html" title="trait hashbrown::Equivalent">Equivalent</a><T> + ?<a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</div></h4></section></summary><div class="docblock"><p>Returns a reference to the value in the set, if any, that is equal to the given value.</p>
|
|||
|
|
<p>The value may be any borrowed form of the set’s value type, but
|
|||
|
|
<a href="https://doc.rust-lang.org/std/hash/trait.Hash.html"><code>Hash</code></a> and <a href="https://doc.rust-lang.org/std/cmp/trait.Eq.html"><code>Eq</code></a> on the borrowed form <em>must</em> match those for
|
|||
|
|
the value type.</p>
|
|||
|
|
<h5 id="examples-23"><a href="#examples-23">Examples</a></h5>
|
|||
|
|
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>hashbrown::HashSet;
|
|||
|
|
|
|||
|
|
<span class="kw">let </span>set: HashSet<<span class="kw">_</span>> = [<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>].iter().cloned().collect();
|
|||
|
|
<span class="macro">assert_eq!</span>(set.get(<span class="kw-2">&</span><span class="number">2</span>), <span class="prelude-val">Some</span>(<span class="kw-2">&</span><span class="number">2</span>));
|
|||
|
|
<span class="macro">assert_eq!</span>(set.get(<span class="kw-2">&</span><span class="number">4</span>), <span class="prelude-val">None</span>);</code></pre></div>
|
|||
|
|
</div></details><details class="toggle method-toggle" open><summary><section id="method.get_or_insert" class="method"><a class="src rightside" href="../src/hashbrown/set.rs.html#913-921">source</a><h4 class="code-header">pub fn <a href="#method.get_or_insert" class="fn">get_or_insert</a>(&mut self, value: T) -> <a class="primitive" href="https://doc.rust-lang.org/1.76.0/core/primitive.reference.html">&T</a></h4></section></summary><div class="docblock"><p>Inserts the given <code>value</code> into the set if it is not present, then
|
|||
|
|
returns a reference to the value in the set.</p>
|
|||
|
|
<h5 id="examples-24"><a href="#examples-24">Examples</a></h5>
|
|||
|
|
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>hashbrown::HashSet;
|
|||
|
|
|
|||
|
|
<span class="kw">let </span><span class="kw-2">mut </span>set: HashSet<<span class="kw">_</span>> = [<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>].iter().cloned().collect();
|
|||
|
|
<span class="macro">assert_eq!</span>(set.len(), <span class="number">3</span>);
|
|||
|
|
<span class="macro">assert_eq!</span>(set.get_or_insert(<span class="number">2</span>), <span class="kw-2">&</span><span class="number">2</span>);
|
|||
|
|
<span class="macro">assert_eq!</span>(set.get_or_insert(<span class="number">100</span>), <span class="kw-2">&</span><span class="number">100</span>);
|
|||
|
|
<span class="macro">assert_eq!</span>(set.len(), <span class="number">4</span>); <span class="comment">// 100 was inserted</span></code></pre></div>
|
|||
|
|
</div></details><details class="toggle method-toggle" open><summary><section id="method.get_or_insert_owned" class="method"><a class="src rightside" href="../src/hashbrown/set.rs.html#942-953">source</a><h4 class="code-header">pub fn <a href="#method.get_or_insert_owned" class="fn">get_or_insert_owned</a><Q>(&mut self, value: <a class="primitive" href="https://doc.rust-lang.org/1.76.0/core/primitive.reference.html">&Q</a>) -> <a class="primitive" href="https://doc.rust-lang.org/1.76.0/core/primitive.reference.html">&T</a><div class="where">where
|
|||
|
|
Q: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/hash/trait.Hash.html" title="trait core::hash::Hash">Hash</a> + <a class="trait" href="trait.Equivalent.html" title="trait hashbrown::Equivalent">Equivalent</a><T> + <a class="trait" href="https://doc.rust-lang.org/1.76.0/alloc/borrow/trait.ToOwned.html" title="trait alloc::borrow::ToOwned">ToOwned</a><Owned = T> + ?<a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</div></h4></section></summary><div class="docblock"><p>Inserts an owned copy of the given <code>value</code> into the set if it is not
|
|||
|
|
present, then returns a reference to the value in the set.</p>
|
|||
|
|
<h5 id="examples-25"><a href="#examples-25">Examples</a></h5>
|
|||
|
|
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>hashbrown::HashSet;
|
|||
|
|
|
|||
|
|
<span class="kw">let </span><span class="kw-2">mut </span>set: HashSet<String> = [<span class="string">"cat"</span>, <span class="string">"dog"</span>, <span class="string">"horse"</span>]
|
|||
|
|
.iter().map(|<span class="kw-2">&</span>pet| pet.to_owned()).collect();
|
|||
|
|
|
|||
|
|
<span class="macro">assert_eq!</span>(set.len(), <span class="number">3</span>);
|
|||
|
|
<span class="kw">for </span><span class="kw-2">&</span>pet <span class="kw">in </span><span class="kw-2">&</span>[<span class="string">"cat"</span>, <span class="string">"dog"</span>, <span class="string">"fish"</span>] {
|
|||
|
|
<span class="kw">let </span>value = set.get_or_insert_owned(pet);
|
|||
|
|
<span class="macro">assert_eq!</span>(value, pet);
|
|||
|
|
}
|
|||
|
|
<span class="macro">assert_eq!</span>(set.len(), <span class="number">4</span>); <span class="comment">// a new "fish" was inserted</span></code></pre></div>
|
|||
|
|
</div></details><details class="toggle method-toggle" open><summary><section id="method.get_or_insert_with" class="method"><a class="src rightside" href="../src/hashbrown/set.rs.html#974-986">source</a><h4 class="code-header">pub fn <a href="#method.get_or_insert_with" class="fn">get_or_insert_with</a><Q, F>(&mut self, value: <a class="primitive" href="https://doc.rust-lang.org/1.76.0/core/primitive.reference.html">&Q</a>, f: F) -> <a class="primitive" href="https://doc.rust-lang.org/1.76.0/core/primitive.reference.html">&T</a><div class="where">where
|
|||
|
|
Q: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/hash/trait.Hash.html" title="trait core::hash::Hash">Hash</a> + <a class="trait" href="trait.Equivalent.html" title="trait hashbrown::Equivalent">Equivalent</a><T> + ?<a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,
|
|||
|
|
F: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(<a class="primitive" href="https://doc.rust-lang.org/1.76.0/core/primitive.reference.html">&Q</a>) -> T,</div></h4></section></summary><div class="docblock"><p>Inserts a value computed from <code>f</code> into the set if the given <code>value</code> is
|
|||
|
|
not present, then returns a reference to the value in the set.</p>
|
|||
|
|
<h5 id="examples-26"><a href="#examples-26">Examples</a></h5>
|
|||
|
|
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>hashbrown::HashSet;
|
|||
|
|
|
|||
|
|
<span class="kw">let </span><span class="kw-2">mut </span>set: HashSet<String> = [<span class="string">"cat"</span>, <span class="string">"dog"</span>, <span class="string">"horse"</span>]
|
|||
|
|
.iter().map(|<span class="kw-2">&</span>pet| pet.to_owned()).collect();
|
|||
|
|
|
|||
|
|
<span class="macro">assert_eq!</span>(set.len(), <span class="number">3</span>);
|
|||
|
|
<span class="kw">for </span><span class="kw-2">&</span>pet <span class="kw">in </span><span class="kw-2">&</span>[<span class="string">"cat"</span>, <span class="string">"dog"</span>, <span class="string">"fish"</span>] {
|
|||
|
|
<span class="kw">let </span>value = set.get_or_insert_with(pet, str::to_owned);
|
|||
|
|
<span class="macro">assert_eq!</span>(value, pet);
|
|||
|
|
}
|
|||
|
|
<span class="macro">assert_eq!</span>(set.len(), <span class="number">4</span>); <span class="comment">// a new "fish" was inserted</span></code></pre></div>
|
|||
|
|
</div></details><details class="toggle method-toggle" open><summary><section id="method.entry" class="method"><a class="src rightside" href="../src/hashbrown/set.rs.html#1022-1027">source</a><h4 class="code-header">pub fn <a href="#method.entry" class="fn">entry</a>(&mut self, value: T) -> <a class="enum" href="hash_set/enum.Entry.html" title="enum hashbrown::hash_set::Entry">Entry</a><'_, T, S, A></h4></section></summary><div class="docblock"><p>Gets the given value’s corresponding entry in the set for in-place manipulation.</p>
|
|||
|
|
<h5 id="examples-27"><a href="#examples-27">Examples</a></h5>
|
|||
|
|
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>hashbrown::HashSet;
|
|||
|
|
<span class="kw">use </span>hashbrown::hash_set::Entry::<span class="kw-2">*</span>;
|
|||
|
|
|
|||
|
|
<span class="kw">let </span><span class="kw-2">mut </span>singles = HashSet::new();
|
|||
|
|
<span class="kw">let </span><span class="kw-2">mut </span>dupes = HashSet::new();
|
|||
|
|
|
|||
|
|
<span class="kw">for </span>ch <span class="kw">in </span><span class="string">"a short treatise on fungi"</span>.chars() {
|
|||
|
|
<span class="kw">if let </span>Vacant(dupe_entry) = dupes.entry(ch) {
|
|||
|
|
<span class="comment">// We haven't already seen a duplicate, so
|
|||
|
|
// check if we've at least seen it once.
|
|||
|
|
</span><span class="kw">match </span>singles.entry(ch) {
|
|||
|
|
Vacant(single_entry) => {
|
|||
|
|
<span class="comment">// We found a new character for the first time.
|
|||
|
|
</span>single_entry.insert()
|
|||
|
|
}
|
|||
|
|
Occupied(single_entry) => {
|
|||
|
|
<span class="comment">// We've already seen this once, "move" it to dupes.
|
|||
|
|
</span>single_entry.remove();
|
|||
|
|
dupe_entry.insert();
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
<span class="macro">assert!</span>(!singles.contains(<span class="kw-2">&</span><span class="string">'t'</span>) && dupes.contains(<span class="kw-2">&</span><span class="string">'t'</span>));
|
|||
|
|
<span class="macro">assert!</span>(singles.contains(<span class="kw-2">&</span><span class="string">'u'</span>) && !dupes.contains(<span class="kw-2">&</span><span class="string">'u'</span>));
|
|||
|
|
<span class="macro">assert!</span>(!singles.contains(<span class="kw-2">&</span><span class="string">'v'</span>) && !dupes.contains(<span class="kw-2">&</span><span class="string">'v'</span>));</code></pre></div>
|
|||
|
|
</div></details><details class="toggle method-toggle" open><summary><section id="method.is_disjoint" class="method"><a class="src rightside" href="../src/hashbrown/set.rs.html#1046-1048">source</a><h4 class="code-header">pub fn <a href="#method.is_disjoint" class="fn">is_disjoint</a>(&self, other: <a class="primitive" href="https://doc.rust-lang.org/1.76.0/core/primitive.reference.html">&Self</a>) -> <a class="primitive" href="https://doc.rust-lang.org/1.76.0/core/primitive.bool.html">bool</a></h4></section></summary><div class="docblock"><p>Returns <code>true</code> if <code>self</code> has no elements in common with <code>other</code>.
|
|||
|
|
This is equivalent to checking for an empty intersection.</p>
|
|||
|
|
<h5 id="examples-28"><a href="#examples-28">Examples</a></h5>
|
|||
|
|
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>hashbrown::HashSet;
|
|||
|
|
|
|||
|
|
<span class="kw">let </span>a: HashSet<<span class="kw">_</span>> = [<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>].iter().cloned().collect();
|
|||
|
|
<span class="kw">let </span><span class="kw-2">mut </span>b = HashSet::new();
|
|||
|
|
|
|||
|
|
<span class="macro">assert_eq!</span>(a.is_disjoint(<span class="kw-2">&</span>b), <span class="bool-val">true</span>);
|
|||
|
|
b.insert(<span class="number">4</span>);
|
|||
|
|
<span class="macro">assert_eq!</span>(a.is_disjoint(<span class="kw-2">&</span>b), <span class="bool-val">true</span>);
|
|||
|
|
b.insert(<span class="number">1</span>);
|
|||
|
|
<span class="macro">assert_eq!</span>(a.is_disjoint(<span class="kw-2">&</span>b), <span class="bool-val">false</span>);</code></pre></div>
|
|||
|
|
</div></details><details class="toggle method-toggle" open><summary><section id="method.is_subset" class="method"><a class="src rightside" href="../src/hashbrown/set.rs.html#1067-1069">source</a><h4 class="code-header">pub fn <a href="#method.is_subset" class="fn">is_subset</a>(&self, other: <a class="primitive" href="https://doc.rust-lang.org/1.76.0/core/primitive.reference.html">&Self</a>) -> <a class="primitive" href="https://doc.rust-lang.org/1.76.0/core/primitive.bool.html">bool</a></h4></section></summary><div class="docblock"><p>Returns <code>true</code> if the set is a subset of another,
|
|||
|
|
i.e., <code>other</code> contains at least all the values in <code>self</code>.</p>
|
|||
|
|
<h5 id="examples-29"><a href="#examples-29">Examples</a></h5>
|
|||
|
|
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>hashbrown::HashSet;
|
|||
|
|
|
|||
|
|
<span class="kw">let </span>sup: HashSet<<span class="kw">_</span>> = [<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>].iter().cloned().collect();
|
|||
|
|
<span class="kw">let </span><span class="kw-2">mut </span>set = HashSet::new();
|
|||
|
|
|
|||
|
|
<span class="macro">assert_eq!</span>(set.is_subset(<span class="kw-2">&</span>sup), <span class="bool-val">true</span>);
|
|||
|
|
set.insert(<span class="number">2</span>);
|
|||
|
|
<span class="macro">assert_eq!</span>(set.is_subset(<span class="kw-2">&</span>sup), <span class="bool-val">true</span>);
|
|||
|
|
set.insert(<span class="number">4</span>);
|
|||
|
|
<span class="macro">assert_eq!</span>(set.is_subset(<span class="kw-2">&</span>sup), <span class="bool-val">false</span>);</code></pre></div>
|
|||
|
|
</div></details><details class="toggle method-toggle" open><summary><section id="method.is_superset" class="method"><a class="src rightside" href="../src/hashbrown/set.rs.html#1092-1094">source</a><h4 class="code-header">pub fn <a href="#method.is_superset" class="fn">is_superset</a>(&self, other: <a class="primitive" href="https://doc.rust-lang.org/1.76.0/core/primitive.reference.html">&Self</a>) -> <a class="primitive" href="https://doc.rust-lang.org/1.76.0/core/primitive.bool.html">bool</a></h4></section></summary><div class="docblock"><p>Returns <code>true</code> if the set is a superset of another,
|
|||
|
|
i.e., <code>self</code> contains at least all the values in <code>other</code>.</p>
|
|||
|
|
<h5 id="examples-30"><a href="#examples-30">Examples</a></h5>
|
|||
|
|
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>hashbrown::HashSet;
|
|||
|
|
|
|||
|
|
<span class="kw">let </span>sub: HashSet<<span class="kw">_</span>> = [<span class="number">1</span>, <span class="number">2</span>].iter().cloned().collect();
|
|||
|
|
<span class="kw">let </span><span class="kw-2">mut </span>set = HashSet::new();
|
|||
|
|
|
|||
|
|
<span class="macro">assert_eq!</span>(set.is_superset(<span class="kw-2">&</span>sub), <span class="bool-val">false</span>);
|
|||
|
|
|
|||
|
|
set.insert(<span class="number">0</span>);
|
|||
|
|
set.insert(<span class="number">1</span>);
|
|||
|
|
<span class="macro">assert_eq!</span>(set.is_superset(<span class="kw-2">&</span>sub), <span class="bool-val">false</span>);
|
|||
|
|
|
|||
|
|
set.insert(<span class="number">2</span>);
|
|||
|
|
<span class="macro">assert_eq!</span>(set.is_superset(<span class="kw-2">&</span>sub), <span class="bool-val">true</span>);</code></pre></div>
|
|||
|
|
</div></details><details class="toggle method-toggle" open><summary><section id="method.insert" class="method"><a class="src rightside" href="../src/hashbrown/set.rs.html#1114-1116">source</a><h4 class="code-header">pub fn <a href="#method.insert" class="fn">insert</a>(&mut self, value: T) -> <a class="primitive" href="https://doc.rust-lang.org/1.76.0/core/primitive.bool.html">bool</a></h4></section></summary><div class="docblock"><p>Adds a value to the set.</p>
|
|||
|
|
<p>If the set did not have this value present, <code>true</code> is returned.</p>
|
|||
|
|
<p>If the set did have this value present, <code>false</code> is returned.</p>
|
|||
|
|
<h5 id="examples-31"><a href="#examples-31">Examples</a></h5>
|
|||
|
|
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>hashbrown::HashSet;
|
|||
|
|
|
|||
|
|
<span class="kw">let </span><span class="kw-2">mut </span>set = HashSet::new();
|
|||
|
|
|
|||
|
|
<span class="macro">assert_eq!</span>(set.insert(<span class="number">2</span>), <span class="bool-val">true</span>);
|
|||
|
|
<span class="macro">assert_eq!</span>(set.insert(<span class="number">2</span>), <span class="bool-val">false</span>);
|
|||
|
|
<span class="macro">assert_eq!</span>(set.len(), <span class="number">1</span>);</code></pre></div>
|
|||
|
|
</div></details><details class="toggle method-toggle" open><summary><section id="method.insert_unique_unchecked" class="method"><a class="src rightside" href="../src/hashbrown/set.rs.html#1138-1140">source</a><h4 class="code-header">pub fn <a href="#method.insert_unique_unchecked" class="fn">insert_unique_unchecked</a>(&mut self, value: T) -> <a class="primitive" href="https://doc.rust-lang.org/1.76.0/core/primitive.reference.html">&T</a></h4></section></summary><div class="docblock"><p>Insert a value the set without checking if the value already exists in the set.</p>
|
|||
|
|
<p>Returns a reference to the value just inserted.</p>
|
|||
|
|
<p>This operation is safe if a value does not exist in the set.</p>
|
|||
|
|
<p>However, if a value exists in the set already, the behavior is unspecified:
|
|||
|
|
this operation may panic, loop forever, or any following operation with the set
|
|||
|
|
may panic, loop forever or return arbitrary result.</p>
|
|||
|
|
<p>That said, this operation (and following operations) are guaranteed to
|
|||
|
|
not violate memory safety.</p>
|
|||
|
|
<p>This operation is faster than regular insert, because it does not perform
|
|||
|
|
lookup before insertion.</p>
|
|||
|
|
<p>This operation is useful during initial population of the set.
|
|||
|
|
For example, when constructing a set from another set, we know
|
|||
|
|
that values are unique.</p>
|
|||
|
|
</div></details><details class="toggle method-toggle" open><summary><section id="method.replace" class="method"><a class="src rightside" href="../src/hashbrown/set.rs.html#1158-1166">source</a><h4 class="code-header">pub fn <a href="#method.replace" class="fn">replace</a>(&mut self, value: T) -> <a class="enum" href="https://doc.rust-lang.org/1.76.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><T></h4></section></summary><div class="docblock"><p>Adds a value to the set, replacing the existing value, if any, that is equal to the given
|
|||
|
|
one. Returns the replaced value.</p>
|
|||
|
|
<h5 id="examples-32"><a href="#examples-32">Examples</a></h5>
|
|||
|
|
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>hashbrown::HashSet;
|
|||
|
|
|
|||
|
|
<span class="kw">let </span><span class="kw-2">mut </span>set = HashSet::new();
|
|||
|
|
set.insert(Vec::<i32>::new());
|
|||
|
|
|
|||
|
|
<span class="macro">assert_eq!</span>(set.get(<span class="kw-2">&</span>[][..]).unwrap().capacity(), <span class="number">0</span>);
|
|||
|
|
set.replace(Vec::with_capacity(<span class="number">10</span>));
|
|||
|
|
<span class="macro">assert_eq!</span>(set.get(<span class="kw-2">&</span>[][..]).unwrap().capacity(), <span class="number">10</span>);</code></pre></div>
|
|||
|
|
</div></details><details class="toggle method-toggle" open><summary><section id="method.remove" class="method"><a class="src rightside" href="../src/hashbrown/set.rs.html#1190-1195">source</a><h4 class="code-header">pub fn <a href="#method.remove" class="fn">remove</a><Q>(&mut self, value: <a class="primitive" href="https://doc.rust-lang.org/1.76.0/core/primitive.reference.html">&Q</a>) -> <a class="primitive" href="https://doc.rust-lang.org/1.76.0/core/primitive.bool.html">bool</a><div class="where">where
|
|||
|
|
Q: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/hash/trait.Hash.html" title="trait core::hash::Hash">Hash</a> + <a class="trait" href="trait.Equivalent.html" title="trait hashbrown::Equivalent">Equivalent</a><T> + ?<a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</div></h4></section></summary><div class="docblock"><p>Removes a value from the set. Returns whether the value was
|
|||
|
|
present in the set.</p>
|
|||
|
|
<p>The value may be any borrowed form of the set’s value type, but
|
|||
|
|
<a href="https://doc.rust-lang.org/std/hash/trait.Hash.html"><code>Hash</code></a> and <a href="https://doc.rust-lang.org/std/cmp/trait.Eq.html"><code>Eq</code></a> on the borrowed form <em>must</em> match those for
|
|||
|
|
the value type.</p>
|
|||
|
|
<h5 id="examples-33"><a href="#examples-33">Examples</a></h5>
|
|||
|
|
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>hashbrown::HashSet;
|
|||
|
|
|
|||
|
|
<span class="kw">let </span><span class="kw-2">mut </span>set = HashSet::new();
|
|||
|
|
|
|||
|
|
set.insert(<span class="number">2</span>);
|
|||
|
|
<span class="macro">assert_eq!</span>(set.remove(<span class="kw-2">&</span><span class="number">2</span>), <span class="bool-val">true</span>);
|
|||
|
|
<span class="macro">assert_eq!</span>(set.remove(<span class="kw-2">&</span><span class="number">2</span>), <span class="bool-val">false</span>);</code></pre></div>
|
|||
|
|
</div></details><details class="toggle method-toggle" open><summary><section id="method.take" class="method"><a class="src rightside" href="../src/hashbrown/set.rs.html#1216-1225">source</a><h4 class="code-header">pub fn <a href="#method.take" class="fn">take</a><Q>(&mut self, value: <a class="primitive" href="https://doc.rust-lang.org/1.76.0/core/primitive.reference.html">&Q</a>) -> <a class="enum" href="https://doc.rust-lang.org/1.76.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><T><div class="where">where
|
|||
|
|
Q: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/hash/trait.Hash.html" title="trait core::hash::Hash">Hash</a> + <a class="trait" href="trait.Equivalent.html" title="trait hashbrown::Equivalent">Equivalent</a><T> + ?<a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</div></h4></section></summary><div class="docblock"><p>Removes and returns the value in the set, if any, that is equal to the given one.</p>
|
|||
|
|
<p>The value may be any borrowed form of the set’s value type, but
|
|||
|
|
<a href="https://doc.rust-lang.org/std/hash/trait.Hash.html"><code>Hash</code></a> and <a href="https://doc.rust-lang.org/std/cmp/trait.Eq.html"><code>Eq</code></a> on the borrowed form <em>must</em> match those for
|
|||
|
|
the value type.</p>
|
|||
|
|
<h5 id="examples-34"><a href="#examples-34">Examples</a></h5>
|
|||
|
|
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>hashbrown::HashSet;
|
|||
|
|
|
|||
|
|
<span class="kw">let </span><span class="kw-2">mut </span>set: HashSet<<span class="kw">_</span>> = [<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>].iter().cloned().collect();
|
|||
|
|
<span class="macro">assert_eq!</span>(set.take(<span class="kw-2">&</span><span class="number">2</span>), <span class="prelude-val">Some</span>(<span class="number">2</span>));
|
|||
|
|
<span class="macro">assert_eq!</span>(set.take(<span class="kw-2">&</span><span class="number">2</span>), <span class="prelude-val">None</span>);</code></pre></div>
|
|||
|
|
</div></details></div></details><details class="toggle implementors-toggle" open><summary><section id="impl-HashSet%3CT,+S,+A%3E-3" class="impl"><a class="src rightside" href="../src/hashbrown/set.rs.html#1228-1268">source</a><a href="#impl-HashSet%3CT,+S,+A%3E-3" class="anchor">§</a><h3 class="code-header">impl<T, S, A: Allocator> <a class="struct" href="hash_set/struct.HashSet.html" title="struct hashbrown::hash_set::HashSet">HashSet</a><T, S, A></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.raw_table" class="method"><a class="src rightside" href="../src/hashbrown/set.rs.html#1245-1247">source</a><h4 class="code-header">pub fn <a href="#method.raw_table" class="fn">raw_table</a>(&self) -> &<a class="struct" href="raw/struct.RawTable.html" title="struct hashbrown::raw::RawTable">RawTable</a><(T, <a class="primitive" href="https://doc.rust-lang.org/1.76.0/core/primitive.unit.html">()</a>), A></h4></section></summary><div class="docblock"><p>Returns a reference to the <a href="raw/struct.RawTable.html" title="struct hashbrown::raw::RawTable"><code>RawTable</code></a> used underneath <a href="struct.HashSet.html"><code>HashSet</code></a>.
|
|||
|
|
This function is only available if the <code>raw</code> feature of the crate is enabled.</p>
|
|||
|
|
<h5 id="note"><a href="#note">Note</a></h5>
|
|||
|
|
<p>Calling this function is safe, but using the raw hash table API may require
|
|||
|
|
unsafe functions or blocks.</p>
|
|||
|
|
<p><code>RawTable</code> API gives the lowest level of control under the set that can be useful
|
|||
|
|
for extending the HashSet’s API, but may lead to <em><a href="https://doc.rust-lang.org/reference/behavior-considered-undefined.html">undefined behavior</a></em>.</p>
|
|||
|
|
</div></details><details class="toggle method-toggle" open><summary><section id="method.raw_table_mut" class="method"><a class="src rightside" href="../src/hashbrown/set.rs.html#1265-1267">source</a><h4 class="code-header">pub fn <a href="#method.raw_table_mut" class="fn">raw_table_mut</a>(&mut self) -> &mut <a class="struct" href="raw/struct.RawTable.html" title="struct hashbrown::raw::RawTable">RawTable</a><(T, <a class="primitive" href="https://doc.rust-lang.org/1.76.0/core/primitive.unit.html">()</a>), A></h4></section></summary><div class="docblock"><p>Returns a mutable reference to the <a href="raw/struct.RawTable.html" title="struct hashbrown::raw::RawTable"><code>RawTable</code></a> used underneath <a href="struct.HashSet.html"><code>HashSet</code></a>.
|
|||
|
|
This function is only available if the <code>raw</code> feature of the crate is enabled.</p>
|
|||
|
|
<h5 id="note-1"><a href="#note-1">Note</a></h5>
|
|||
|
|
<p>Calling this function is safe, but using the raw hash table API may require
|
|||
|
|
unsafe functions or blocks.</p>
|
|||
|
|
<p><code>RawTable</code> API gives the lowest level of control under the set that can be useful
|
|||
|
|
for extending the HashSet’s API, but may lead to <em><a href="https://doc.rust-lang.org/reference/behavior-considered-undefined.html">undefined behavior</a></em>.</p>
|
|||
|
|
</div></details></div></details></div><h2 id="trait-implementations" class="section-header">Trait Implementations<a href="#trait-implementations" class="anchor">§</a></h2><div id="trait-implementations-list"><details class="toggle implementors-toggle" open><summary><section id="impl-BitAnd%3C%26HashSet%3CT,+S,+A%3E%3E-for-%26HashSet%3CT,+S,+A%3E" class="impl"><a class="src rightside" href="../src/hashbrown/set.rs.html#1442-1473">source</a><a href="#impl-BitAnd%3C%26HashSet%3CT,+S,+A%3E%3E-for-%26HashSet%3CT,+S,+A%3E" class="anchor">§</a><h3 class="code-header">impl<T, S, A> <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/ops/bit/trait.BitAnd.html" title="trait core::ops::bit::BitAnd">BitAnd</a><&<a class="struct" href="hash_set/struct.HashSet.html" title="struct hashbrown::hash_set::HashSet">HashSet</a><T, S, A>> for &<a class="struct" href="hash_set/struct.HashSet.html" title="struct hashbrown::hash_set::HashSet">HashSet</a><T, S, A><div class="where">where
|
|||
|
|
T: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/cmp/trait.Eq.html" title="trait core::cmp::Eq">Eq</a> + <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/hash/trait.Hash.html" title="trait core::hash::Hash">Hash</a> + <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a>,
|
|||
|
|
S: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/hash/trait.BuildHasher.html" title="trait core::hash::BuildHasher">BuildHasher</a> + <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/default/trait.Default.html" title="trait core::default::Default">Default</a>,
|
|||
|
|
A: Allocator,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.bitand" class="method trait-impl"><a class="src rightside" href="../src/hashbrown/set.rs.html#1470-1472">source</a><a href="#method.bitand" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/ops/bit/trait.BitAnd.html#tymethod.bitand" class="fn">bitand</a>(self, rhs: &<a class="struct" href="hash_set/struct.HashSet.html" title="struct hashbrown::hash_set::HashSet">HashSet</a><T, S, A>) -> <a class="struct" href="hash_set/struct.HashSet.html" title="struct hashbrown::hash_set::HashSet">HashSet</a><T, S></h4></section></summary><div class="docblock"><p>Returns the intersection of <code>self</code> and <code>rhs</code> as a new <code>HashSet<T, S></code>.</p>
|
|||
|
|
<h5 id="examples-35"><a href="#examples-35">Examples</a></h5>
|
|||
|
|
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>hashbrown::HashSet;
|
|||
|
|
|
|||
|
|
<span class="kw">let </span>a: HashSet<<span class="kw">_</span>> = <span class="macro">vec!</span>[<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>].into_iter().collect();
|
|||
|
|
<span class="kw">let </span>b: HashSet<<span class="kw">_</span>> = <span class="macro">vec!</span>[<span class="number">2</span>, <span class="number">3</span>, <span class="number">4</span>].into_iter().collect();
|
|||
|
|
|
|||
|
|
<span class="kw">let </span>set = <span class="kw-2">&</span>a & <span class="kw-2">&</span>b;
|
|||
|
|
|
|||
|
|
<span class="kw">let </span><span class="kw-2">mut </span>i = <span class="number">0</span>;
|
|||
|
|
<span class="kw">let </span>expected = [<span class="number">2</span>, <span class="number">3</span>];
|
|||
|
|
<span class="kw">for </span>x <span class="kw">in </span><span class="kw-2">&</span>set {
|
|||
|
|
<span class="macro">assert!</span>(expected.contains(x));
|
|||
|
|
i += <span class="number">1</span>;
|
|||
|
|
}
|
|||
|
|
<span class="macro">assert_eq!</span>(i, expected.len());</code></pre></div>
|
|||
|
|
</div></details><details class="toggle" open><summary><section id="associatedtype.Output" class="associatedtype trait-impl"><a href="#associatedtype.Output" class="anchor">§</a><h4 class="code-header">type <a href="https://doc.rust-lang.org/1.76.0/core/ops/bit/trait.BitAnd.html#associatedtype.Output" class="associatedtype">Output</a> = <a class="struct" href="hash_set/struct.HashSet.html" title="struct hashbrown::hash_set::HashSet">HashSet</a><T, S></h4></section></summary><div class='docblock'>The resulting type after applying the <code>&</code> operator.</div></details></div></details><details class="toggle implementors-toggle" open><summary><section id="impl-BitOr%3C%26HashSet%3CT,+S,+A%3E%3E-for-%26HashSet%3CT,+S,+A%3E" class="impl"><a class="src rightside" href="../src/hashbrown/set.rs.html#1409-1440">source</a><a href="#impl-BitOr%3C%26HashSet%3CT,+S,+A%3E%3E-for-%26HashSet%3CT,+S,+A%3E" class="anchor">§</a><h3 class="code-header">impl<T, S, A> <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/ops/bit/trait.BitOr.html" title="trait core::ops::bit::BitOr">BitOr</a><&<a class="struct" href="hash_set/struct.HashSet.html" title="struct hashbrown::hash_set::HashSet">HashSet</a><T, S, A>> for &<a class="struct" href="hash_set/struct.HashSet.html" title="struct hashbrown::hash_set::HashSet">HashSet</a><T, S, A><div class="where">where
|
|||
|
|
T: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/cmp/trait.Eq.html" title="trait core::cmp::Eq">Eq</a> + <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/hash/trait.Hash.html" title="trait core::hash::Hash">Hash</a> + <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a>,
|
|||
|
|
S: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/hash/trait.BuildHasher.html" title="trait core::hash::BuildHasher">BuildHasher</a> + <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/default/trait.Default.html" title="trait core::default::Default">Default</a>,
|
|||
|
|
A: Allocator,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.bitor" class="method trait-impl"><a class="src rightside" href="../src/hashbrown/set.rs.html#1437-1439">source</a><a href="#method.bitor" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/ops/bit/trait.BitOr.html#tymethod.bitor" class="fn">bitor</a>(self, rhs: &<a class="struct" href="hash_set/struct.HashSet.html" title="struct hashbrown::hash_set::HashSet">HashSet</a><T, S, A>) -> <a class="struct" href="hash_set/struct.HashSet.html" title="struct hashbrown::hash_set::HashSet">HashSet</a><T, S></h4></section></summary><div class="docblock"><p>Returns the union of <code>self</code> and <code>rhs</code> as a new <code>HashSet<T, S></code>.</p>
|
|||
|
|
<h5 id="examples-39"><a href="#examples-39">Examples</a></h5>
|
|||
|
|
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>hashbrown::HashSet;
|
|||
|
|
|
|||
|
|
<span class="kw">let </span>a: HashSet<<span class="kw">_</span>> = <span class="macro">vec!</span>[<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>].into_iter().collect();
|
|||
|
|
<span class="kw">let </span>b: HashSet<<span class="kw">_</span>> = <span class="macro">vec!</span>[<span class="number">3</span>, <span class="number">4</span>, <span class="number">5</span>].into_iter().collect();
|
|||
|
|
|
|||
|
|
<span class="kw">let </span>set = <span class="kw-2">&</span>a | <span class="kw-2">&</span>b;
|
|||
|
|
|
|||
|
|
<span class="kw">let </span><span class="kw-2">mut </span>i = <span class="number">0</span>;
|
|||
|
|
<span class="kw">let </span>expected = [<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="kw">for </span>x <span class="kw">in </span><span class="kw-2">&</span>set {
|
|||
|
|
<span class="macro">assert!</span>(expected.contains(x));
|
|||
|
|
i += <span class="number">1</span>;
|
|||
|
|
}
|
|||
|
|
<span class="macro">assert_eq!</span>(i, expected.len());</code></pre></div>
|
|||
|
|
</div></details><details class="toggle" open><summary><section id="associatedtype.Output-3" class="associatedtype trait-impl"><a href="#associatedtype.Output-3" class="anchor">§</a><h4 class="code-header">type <a href="https://doc.rust-lang.org/1.76.0/core/ops/bit/trait.BitOr.html#associatedtype.Output" class="associatedtype">Output</a> = <a class="struct" href="hash_set/struct.HashSet.html" title="struct hashbrown::hash_set::HashSet">HashSet</a><T, S></h4></section></summary><div class='docblock'>The resulting type after applying the <code>|</code> operator.</div></details></div></details><details class="toggle implementors-toggle" open><summary><section id="impl-BitXor%3C%26HashSet%3CT,+S%3E%3E-for-%26HashSet%3CT,+S%3E" class="impl"><a class="src rightside" href="../src/hashbrown/set.rs.html#1475-1505">source</a><a href="#impl-BitXor%3C%26HashSet%3CT,+S%3E%3E-for-%26HashSet%3CT,+S%3E" class="anchor">§</a><h3 class="code-header">impl<T, S> <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/ops/bit/trait.BitXor.html" title="trait core::ops::bit::BitXor">BitXor</a><&<a class="struct" href="hash_set/struct.HashSet.html" title="struct hashbrown::hash_set::HashSet">HashSet</a><T, S>> for &<a class="struct" href="hash_set/struct.HashSet.html" title="struct hashbrown::hash_set::HashSet">HashSet</a><T, S><div class="where">where
|
|||
|
|
T: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/cmp/trait.Eq.html" title="trait core::cmp::Eq">Eq</a> + <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/hash/trait.Hash.html" title="trait core::hash::Hash">Hash</a> + <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a>,
|
|||
|
|
S: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/hash/trait.BuildHasher.html" title="trait core::hash::BuildHasher">BuildHasher</a> + <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/default/trait.Default.html" title="trait core::default::Default">Default</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.bitxor" class="method trait-impl"><a class="src rightside" href="../src/hashbrown/set.rs.html#1502-1504">source</a><a href="#method.bitxor" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/ops/bit/trait.BitXor.html#tymethod.bitxor" class="fn">bitxor</a>(self, rhs: &<a class="struct" href="hash_set/struct.HashSet.html" title="struct hashbrown::hash_set::HashSet">HashSet</a><T, S>) -> <a class="struct" href="hash_set/struct.HashSet.html" title="struct hashbrown::hash_set::HashSet">HashSet</a><T, S></h4></section></summary><div class="docblock"><p>Returns the symmetric difference of <code>self</code> and <code>rhs</code> as a new <code>HashSet<T, S></code>.</p>
|
|||
|
|
<h5 id="examples-36"><a href="#examples-36">Examples</a></h5>
|
|||
|
|
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>hashbrown::HashSet;
|
|||
|
|
|
|||
|
|
<span class="kw">let </span>a: HashSet<<span class="kw">_</span>> = <span class="macro">vec!</span>[<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>].into_iter().collect();
|
|||
|
|
<span class="kw">let </span>b: HashSet<<span class="kw">_</span>> = <span class="macro">vec!</span>[<span class="number">3</span>, <span class="number">4</span>, <span class="number">5</span>].into_iter().collect();
|
|||
|
|
|
|||
|
|
<span class="kw">let </span>set = <span class="kw-2">&</span>a ^ <span class="kw-2">&</span>b;
|
|||
|
|
|
|||
|
|
<span class="kw">let </span><span class="kw-2">mut </span>i = <span class="number">0</span>;
|
|||
|
|
<span class="kw">let </span>expected = [<span class="number">1</span>, <span class="number">2</span>, <span class="number">4</span>, <span class="number">5</span>];
|
|||
|
|
<span class="kw">for </span>x <span class="kw">in </span><span class="kw-2">&</span>set {
|
|||
|
|
<span class="macro">assert!</span>(expected.contains(x));
|
|||
|
|
i += <span class="number">1</span>;
|
|||
|
|
}
|
|||
|
|
<span class="macro">assert_eq!</span>(i, expected.len());</code></pre></div>
|
|||
|
|
</div></details><details class="toggle" open><summary><section id="associatedtype.Output-1" class="associatedtype trait-impl"><a href="#associatedtype.Output-1" class="anchor">§</a><h4 class="code-header">type <a href="https://doc.rust-lang.org/1.76.0/core/ops/bit/trait.BitXor.html#associatedtype.Output" class="associatedtype">Output</a> = <a class="struct" href="hash_set/struct.HashSet.html" title="struct hashbrown::hash_set::HashSet">HashSet</a><T, S></h4></section></summary><div class='docblock'>The resulting type after applying the <code>^</code> operator.</div></details></div></details><details class="toggle implementors-toggle" open><summary><section id="impl-Clone-for-HashSet%3CT,+S,+A%3E" class="impl"><a class="src rightside" href="../src/hashbrown/set.rs.html#119-129">source</a><a href="#impl-Clone-for-HashSet%3CT,+S,+A%3E" class="anchor">§</a><h3 class="code-header">impl<T: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a>, S: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a>, A: Allocator + <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a>> <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a> for <a class="struct" href="hash_set/struct.HashSet.html" title="struct hashbrown::hash_set::HashSet">HashSet</a><T, S, A></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.clone" class="method trait-impl"><a class="src rightside" href="../src/hashbrown/set.rs.html#120-124">source</a><a href="#method.clone" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/clone/trait.Clone.html#tymethod.clone" class="fn">clone</a>(&self) -> Self</h4></section></summary><div class='docblock'>Returns a copy of the value. <a href="https://doc.rust-lang.org/1.76.0/core/clone/trait.Clone.html#tymethod.clone">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.clone_from" class="method trait-impl"><a class="src rightside" href="../src/hashbrown/set.rs.html#126-128">source</a><a href="#method.clone_from" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/clone/trait.Clone.html#method.clone_from" class="fn">clone_from</a>(&mut self, source: <a class="primitive" href="https://doc.rust-lang.org/1.76.0/core/primitive.reference.html">&Self</a>)</h4></section></summary><div class='docblock'>Performs copy-assignment from <code>source</code>. <a href="https://doc.rust-lang.org/1.76.0/core/clone/trait.Clone.html#method.clone_from">Read more</a></div></details></div></details><details class="toggle implementors-toggle" open><summary><section id="impl-Debug-for-HashSet%3CT,+S,+A%3E" class="impl"><a class="src rightside" href="../src/hashbrown/set.rs.html#1293-1301">source</a><a href="#impl-Debug-for-HashSet%3CT,+S,+A%3E" class="anchor">§</a><h3 class="code-header">impl<T, S, A> <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/fmt/trait.Debug.html" title="trait core::fmt::Debug">Debug</a> for <a class="struct" href="hash_set/struct.HashSet.html" title="struct hashbrown::hash_set::HashSet">HashSet</a><T, S, A><div class="where">where
|
|||
|
|
T: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/fmt/trait.Debug.html" title="trait core::fmt::Debug">Debug</a>,
|
|||
|
|
A: Allocator,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.fmt" class="method trait-impl"><a class="src rightside" href="../src/hashbrown/set.rs.html#1298-1300">source</a><a href="#method.fmt" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/fmt/trait.Debug.html#tymethod.fmt" class="fn">fmt</a>(&self, f: &mut <a class="struct" href="https://doc.rust-lang.org/1.76.0/core/fmt/struct.Formatter.html" title="struct core::fmt::Formatter">Formatter</a><'_>) -> <a class="type" href="https://doc.rust-lang.org/1.76.0/core/fmt/type.Result.html" title="type core::fmt::Result">Result</a></h4></section></summary><div class='docblock'>Formats the value using the given formatter. <a href="https://doc.rust-lang.org/1.76.0/core/fmt/trait.Debug.html#tymethod.fmt">Read more</a></div></details></div></details><details class="toggle implementors-toggle" open><summary><section id="impl-Default-for-HashSet%3CT,+S,+A%3E" class="impl"><a class="src rightside" href="../src/hashbrown/set.rs.html#1395-1407">source</a><a href="#impl-Default-for-HashSet%3CT,+S,+A%3E" class="anchor">§</a><h3 class="code-header">impl<T, S, A> <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/default/trait.Default.html" title="trait core::default::Default">Default</a> for <a class="struct" href="hash_set/struct.HashSet.html" title="struct hashbrown::hash_set::HashSet">HashSet</a><T, S, A><div class="where">where
|
|||
|
|
S: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/default/trait.Default.html" title="trait core::default::Default">Default</a>,
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A: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/default/trait.Default.html" title="trait core::default::Default">Default</a> + Allocator,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.default" class="method trait-impl"><a class="src rightside" href="../src/hashbrown/set.rs.html#1402-1406">source</a><a href="#method.default" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/default/trait.Default.html#tymethod.default" class="fn">default</a>() -> Self</h4></section></summary><div class="docblock"><p>Creates an empty <code>HashSet<T, S></code> with the <code>Default</code> value for the hasher.</p>
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</div></details></div></details><details class="toggle implementors-toggle" open><summary><section id="impl-Extend%3C%26T%3E-for-HashSet%3CT,+S,+A%3E" class="impl"><a class="src rightside" href="../src/hashbrown/set.rs.html#1371-1393">source</a><a href="#impl-Extend%3C%26T%3E-for-HashSet%3CT,+S,+A%3E" class="anchor">§</a><h3 class="code-header">impl<'a, T, S, A> <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/iter/traits/collect/trait.Extend.html" title="trait core::iter::traits::collect::Extend">Extend</a><<a class="primitive" href="https://doc.rust-lang.org/1.76.0/core/primitive.reference.html">&'a T</a>> for <a class="struct" href="hash_set/struct.HashSet.html" title="struct hashbrown::hash_set::HashSet">HashSet</a><T, S, A><div class="where">where
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T: 'a + <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/cmp/trait.Eq.html" title="trait core::cmp::Eq">Eq</a> + <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/hash/trait.Hash.html" title="trait core::hash::Hash">Hash</a> + <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Copy.html" title="trait core::marker::Copy">Copy</a>,
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S: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/hash/trait.BuildHasher.html" title="trait core::hash::BuildHasher">BuildHasher</a>,
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A: Allocator,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.extend-1" class="method trait-impl"><a class="src rightside" href="../src/hashbrown/set.rs.html#1378-1380">source</a><a href="#method.extend-1" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/iter/traits/collect/trait.Extend.html#tymethod.extend" class="fn">extend</a><I: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/iter/traits/collect/trait.IntoIterator.html" title="trait core::iter::traits::collect::IntoIterator">IntoIterator</a><Item = <a class="primitive" href="https://doc.rust-lang.org/1.76.0/core/primitive.reference.html">&'a T</a>>>(&mut self, iter: I)</h4></section></summary><div class='docblock'>Extends a collection with the contents of an iterator. <a href="https://doc.rust-lang.org/1.76.0/core/iter/traits/collect/trait.Extend.html#tymethod.extend">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.extend_one-1" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/iter/traits/collect.rs.html#376">source</a><a href="#method.extend_one-1" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/iter/traits/collect/trait.Extend.html#method.extend_one" class="fn">extend_one</a>(&mut self, item: A)</h4></section></summary><span class="item-info"><div class="stab unstable"><span class="emoji">🔬</span><span>This is a nightly-only experimental API. (<code>extend_one</code>)</span></div></span><div class='docblock'>Extends a collection with exactly one element.</div></details><details class="toggle method-toggle" open><summary><section id="method.extend_reserve-1" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/iter/traits/collect.rs.html#384">source</a><a href="#method.extend_reserve-1" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/iter/traits/collect/trait.Extend.html#method.extend_reserve" class="fn">extend_reserve</a>(&mut self, additional: <a class="primitive" href="https://doc.rust-lang.org/1.76.0/core/primitive.usize.html">usize</a>)</h4></section></summary><span class="item-info"><div class="stab unstable"><span class="emoji">🔬</span><span>This is a nightly-only experimental API. (<code>extend_one</code>)</span></div></span><div class='docblock'>Reserves capacity in a collection for the given number of additional elements. <a href="https://doc.rust-lang.org/1.76.0/core/iter/traits/collect/trait.Extend.html#method.extend_reserve">Read more</a></div></details></div></details><details class="toggle implementors-toggle" open><summary><section id="impl-Extend%3CT%3E-for-HashSet%3CT,+S,+A%3E" class="impl"><a class="src rightside" href="../src/hashbrown/set.rs.html#1347-1369">source</a><a href="#impl-Extend%3CT%3E-for-HashSet%3CT,+S,+A%3E" class="anchor">§</a><h3 class="code-header">impl<T, S, A> <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/iter/traits/collect/trait.Extend.html" title="trait core::iter::traits::collect::Extend">Extend</a><T> for <a class="struct" href="hash_set/struct.HashSet.html" title="struct hashbrown::hash_set::HashSet">HashSet</a><T, S, A><div class="where">where
|
|||
|
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T: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/cmp/trait.Eq.html" title="trait core::cmp::Eq">Eq</a> + <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/hash/trait.Hash.html" title="trait core::hash::Hash">Hash</a>,
|
|||
|
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S: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/hash/trait.BuildHasher.html" title="trait core::hash::BuildHasher">BuildHasher</a>,
|
|||
|
|
A: Allocator,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.extend" class="method trait-impl"><a class="src rightside" href="../src/hashbrown/set.rs.html#1354-1356">source</a><a href="#method.extend" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/iter/traits/collect/trait.Extend.html#tymethod.extend" class="fn">extend</a><I: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/iter/traits/collect/trait.IntoIterator.html" title="trait core::iter::traits::collect::IntoIterator">IntoIterator</a><Item = T>>(&mut self, iter: I)</h4></section></summary><div class='docblock'>Extends a collection with the contents of an iterator. <a href="https://doc.rust-lang.org/1.76.0/core/iter/traits/collect/trait.Extend.html#tymethod.extend">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.extend_one" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/iter/traits/collect.rs.html#376">source</a><a href="#method.extend_one" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/iter/traits/collect/trait.Extend.html#method.extend_one" class="fn">extend_one</a>(&mut self, item: A)</h4></section></summary><span class="item-info"><div class="stab unstable"><span class="emoji">🔬</span><span>This is a nightly-only experimental API. (<code>extend_one</code>)</span></div></span><div class='docblock'>Extends a collection with exactly one element.</div></details><details class="toggle method-toggle" open><summary><section id="method.extend_reserve" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/iter/traits/collect.rs.html#384">source</a><a href="#method.extend_reserve" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/iter/traits/collect/trait.Extend.html#method.extend_reserve" class="fn">extend_reserve</a>(&mut self, additional: <a class="primitive" href="https://doc.rust-lang.org/1.76.0/core/primitive.usize.html">usize</a>)</h4></section></summary><span class="item-info"><div class="stab unstable"><span class="emoji">🔬</span><span>This is a nightly-only experimental API. (<code>extend_one</code>)</span></div></span><div class='docblock'>Reserves capacity in a collection for the given number of additional elements. <a href="https://doc.rust-lang.org/1.76.0/core/iter/traits/collect/trait.Extend.html#method.extend_reserve">Read more</a></div></details></div></details><details class="toggle implementors-toggle" open><summary><section id="impl-From%3CHashMap%3CT,+(),+S,+A%3E%3E-for-HashSet%3CT,+S,+A%3E" class="impl"><a class="src rightside" href="../src/hashbrown/set.rs.html#1303-1310">source</a><a href="#impl-From%3CHashMap%3CT,+(),+S,+A%3E%3E-for-HashSet%3CT,+S,+A%3E" class="anchor">§</a><h3 class="code-header">impl<T, S, A> <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.From.html" title="trait core::convert::From">From</a><<a class="struct" href="hash_map/struct.HashMap.html" title="struct hashbrown::hash_map::HashMap">HashMap</a><T, <a class="primitive" href="https://doc.rust-lang.org/1.76.0/core/primitive.unit.html">()</a>, S, A>> for <a class="struct" href="hash_set/struct.HashSet.html" title="struct hashbrown::hash_set::HashSet">HashSet</a><T, S, A><div class="where">where
|
|||
|
|
A: Allocator,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.from" class="method trait-impl"><a class="src rightside" href="../src/hashbrown/set.rs.html#1307-1309">source</a><a href="#method.from" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/convert/trait.From.html#tymethod.from" class="fn">from</a>(map: <a class="struct" href="hash_map/struct.HashMap.html" title="struct hashbrown::hash_map::HashMap">HashMap</a><T, <a class="primitive" href="https://doc.rust-lang.org/1.76.0/core/primitive.unit.html">()</a>, S, A>) -> Self</h4></section></summary><div class='docblock'>Converts to this type from the input type.</div></details></div></details><details class="toggle implementors-toggle" open><summary><section id="impl-FromIterator%3CT%3E-for-HashSet%3CT,+S,+A%3E" class="impl"><a class="src rightside" href="../src/hashbrown/set.rs.html#1312-1324">source</a><a href="#impl-FromIterator%3CT%3E-for-HashSet%3CT,+S,+A%3E" class="anchor">§</a><h3 class="code-header">impl<T, S, A> <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/iter/traits/collect/trait.FromIterator.html" title="trait core::iter::traits::collect::FromIterator">FromIterator</a><T> for <a class="struct" href="hash_set/struct.HashSet.html" title="struct hashbrown::hash_set::HashSet">HashSet</a><T, S, A><div class="where">where
|
|||
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T: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/cmp/trait.Eq.html" title="trait core::cmp::Eq">Eq</a> + <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/hash/trait.Hash.html" title="trait core::hash::Hash">Hash</a>,
|
|||
|
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S: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/hash/trait.BuildHasher.html" title="trait core::hash::BuildHasher">BuildHasher</a> + <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/default/trait.Default.html" title="trait core::default::Default">Default</a>,
|
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A: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/default/trait.Default.html" title="trait core::default::Default">Default</a> + Allocator,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.from_iter" class="method trait-impl"><a class="src rightside" href="../src/hashbrown/set.rs.html#1319-1323">source</a><a href="#method.from_iter" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/iter/traits/collect/trait.FromIterator.html#tymethod.from_iter" class="fn">from_iter</a><I: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/iter/traits/collect/trait.IntoIterator.html" title="trait core::iter::traits::collect::IntoIterator">IntoIterator</a><Item = T>>(iter: I) -> Self</h4></section></summary><div class='docblock'>Creates a value from an iterator. <a href="https://doc.rust-lang.org/1.76.0/core/iter/traits/collect/trait.FromIterator.html#tymethod.from_iter">Read more</a></div></details></div></details><details class="toggle implementors-toggle" open><summary><section id="impl-IntoIterator-for-%26HashSet%3CT,+S,+A%3E" class="impl"><a class="src rightside" href="../src/hashbrown/set.rs.html#1638-1646">source</a><a href="#impl-IntoIterator-for-%26HashSet%3CT,+S,+A%3E" class="anchor">§</a><h3 class="code-header">impl<'a, T, S, A: Allocator> <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/iter/traits/collect/trait.IntoIterator.html" title="trait core::iter::traits::collect::IntoIterator">IntoIterator</a> for &'a <a class="struct" href="hash_set/struct.HashSet.html" title="struct hashbrown::hash_set::HashSet">HashSet</a><T, S, A></h3></section></summary><div class="impl-items"><details class="toggle" open><summary><section id="associatedtype.Item" class="associatedtype trait-impl"><a href="#associatedtype.Item" class="anchor">§</a><h4 class="code-header">type <a href="https://doc.rust-lang.org/1.76.0/core/iter/traits/collect/trait.IntoIterator.html#associatedtype.Item" class="associatedtype">Item</a> = <a class="primitive" href="https://doc.rust-lang.org/1.76.0/core/primitive.reference.html">&'a T</a></h4></section></summary><div class='docblock'>The type of the elements being iterated over.</div></details><details class="toggle" open><summary><section id="associatedtype.IntoIter" class="associatedtype trait-impl"><a href="#associatedtype.IntoIter" class="anchor">§</a><h4 class="code-header">type <a href="https://doc.rust-lang.org/1.76.0/core/iter/traits/collect/trait.IntoIterator.html#associatedtype.IntoIter" class="associatedtype">IntoIter</a> = <a class="struct" href="hash_set/struct.Iter.html" title="struct hashbrown::hash_set::Iter">Iter</a><'a, T></h4></section></summary><div class='docblock'>Which kind of iterator are we turning this into?</div></details><details class="toggle method-toggle" open><summary><section id="method.into_iter" class="method trait-impl"><a class="src rightside" href="../src/hashbrown/set.rs.html#1643-1645">source</a><a href="#method.into_iter" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/iter/traits/collect/trait.IntoIterator.html#tymethod.into_iter" class="fn">into_iter</a>(self) -> <a class="struct" href="hash_set/struct.Iter.html" title="struct hashbrown::hash_set::Iter">Iter</a><'a, T> <a href="#" class="tooltip" data-notable-ty="Iter<'a, T>">ⓘ</a></h4></section></summary><div class='docblock'>Creates an iterator from a value. <a href="https://doc.rust-lang.org/1.76.0/core/iter/traits/collect/trait.IntoIterator.html#tymethod.into_iter">Read more</a></div></details></div></details><details class="toggle implementors-toggle" open><summary><section id="impl-IntoIterator-for-HashSet%3CT,+S,+A%3E" class="impl"><a class="src rightside" href="../src/hashbrown/set.rs.html#1648-1678">source</a><a href="#impl-IntoIterator-for-HashSet%3CT,+S,+A%3E" class="anchor">§</a><h3 class="code-header">impl<T, S, A: Allocator> <a class="
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of the set in arbitrary order. The set cannot be used after calling
|
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this.</p>
|
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<h5 id="examples-38"><a href="#examples-38">Examples</a></h5>
|
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>hashbrown::HashSet;
|
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|
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<span class="kw">let </span><span class="kw-2">mut </span>set = HashSet::new();
|
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set.insert(<span class="string">"a"</span>.to_string());
|
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set.insert(<span class="string">"b"</span>.to_string());
|
|||
|
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|
|||
|
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<span class="comment">// Not possible to collect to a Vec<String> with a regular `.iter()`.
|
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|
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</span><span class="kw">let </span>v: Vec<String> = set.into_iter().collect();
|
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|
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|
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<span class="comment">// Will print in an arbitrary order.
|
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|
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</span><span class="kw">for </span>x <span class="kw">in </span><span class="kw-2">&</span>v {
|
|||
|
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<span class="macro">println!</span>(<span class="string">"{}"</span>, x);
|
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|
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}</code></pre></div>
|
|||
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</div></details><details class="toggle" open><summary><section id="associatedtype.Item-1" class="associatedtype trait-impl"><a href="#associatedtype.Item-1" class="anchor">§</a><h4 class="code-header">type <a href="https://doc.rust-lang.org/1.76.0/core/iter/traits/collect/trait.IntoIterator.html#associatedtype.Item" class="associatedtype">Item</a> = T</h4></section></summary><div class='docblock'>The type of the elements being iterated over.</div></details><details class="toggle" open><summary><section id="associatedtype.IntoIter-1" class="associatedtype trait-impl"><a href="#associatedtype.IntoIter-1" class="anchor">§</a><h4 class="code-header">type <a href="https://doc.rust-lang.org/1.76.0/core/iter/traits/collect/trait.IntoIterator.html#associatedtype.IntoIter" class="associatedtype">IntoIter</a> = <a class="struct" href="hash_set/struct.IntoIter.html" title="struct hashbrown::hash_set::IntoIter">IntoIter</a><T, A></h4></section></summary><div class='docblock'>Which kind of iterator are we turning this into?</div></details></div></details><details class="toggle implementors-toggle" open><summary><section id="impl-PartialEq-for-HashSet%3CT,+S,+A%3E" class="impl"><a class="src rightside" href="../src/hashbrown/set.rs.html#1270-1283">source</a><a href="#impl-PartialEq-for-HashSet%3CT,+S,+A%3E" class="anchor">§</a><h3 class="code-header">impl<T, S, A> <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/cmp/trait.PartialEq.html" title="trait core::cmp::PartialEq">PartialEq</a> for <a class="struct" href="hash_set/struct.HashSet.html" title="struct hashbrown::hash_set::HashSet">HashSet</a><T, S, A><div class="where">where
|
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T: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/cmp/trait.Eq.html" title="trait core::cmp::Eq">Eq</a> + <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/hash/trait.Hash.html" title="trait core::hash::Hash">Hash</a>,
|
|||
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S: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/hash/trait.BuildHasher.html" title="trait core::hash::BuildHasher">BuildHasher</a>,
|
|||
|
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A: Allocator,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.eq" class="method trait-impl"><a class="src rightside" href="../src/hashbrown/set.rs.html#1276-1282">source</a><a href="#method.eq" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/cmp/trait.PartialEq.html#tymethod.eq" class="fn">eq</a>(&self, other: <a class="primitive" href="https://doc.rust-lang.org/1.76.0/core/primitive.reference.html">&Self</a>) -> <a class="primitive" href="https://doc.rust-lang.org/1.76.0/core/primitive.bool.html">bool</a></h4></section></summary><div class='docblock'>This method tests for <code>self</code> and <code>other</code> values to be equal, and is used
|
|||
|
|
by <code>==</code>.</div></details><details class="toggle method-toggle" open><summary><section id="method.ne" class="method trait-impl"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="src" href="https://doc.rust-lang.org/1.76.0/src/core/cmp.rs.html#242">source</a></span><a href="#method.ne" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/cmp/trait.PartialEq.html#method.ne" class="fn">ne</a>(&self, other: <a class="primitive" href="https://doc.rust-lang.org/1.76.0/core/primitive.reference.html">&Rhs</a>) -> <a class="primitive" href="https://doc.rust-lang.org/1.76.0/core/primitive.bool.html">bool</a></h4></section></summary><div class='docblock'>This method tests for <code>!=</code>. The default implementation is almost always
|
|||
|
|
sufficient, and should not be overridden without very good reason.</div></details></div></details><details class="toggle implementors-toggle" open><summary><section id="impl-Sub%3C%26HashSet%3CT,+S%3E%3E-for-%26HashSet%3CT,+S%3E" class="impl"><a class="src rightside" href="../src/hashbrown/set.rs.html#1507-1537">source</a><a href="#impl-Sub%3C%26HashSet%3CT,+S%3E%3E-for-%26HashSet%3CT,+S%3E" class="anchor">§</a><h3 class="code-header">impl<T, S> <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/ops/arith/trait.Sub.html" title="trait core::ops::arith::Sub">Sub</a><&<a class="struct" href="hash_set/struct.HashSet.html" title="struct hashbrown::hash_set::HashSet">HashSet</a><T, S>> for &<a class="struct" href="hash_set/struct.HashSet.html" title="struct hashbrown::hash_set::HashSet">HashSet</a><T, S><div class="where">where
|
|||
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T: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/cmp/trait.Eq.html" title="trait core::cmp::Eq">Eq</a> + <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/hash/trait.Hash.html" title="trait core::hash::Hash">Hash</a> + <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a>,
|
|||
|
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S: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/hash/trait.BuildHasher.html" title="trait core::hash::BuildHasher">BuildHasher</a> + <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/default/trait.Default.html" title="trait core::default::Default">Default</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.sub" class="method trait-impl"><a class="src rightside" href="../src/hashbrown/set.rs.html#1534-1536">source</a><a href="#method.sub" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/ops/arith/trait.Sub.html#tymethod.sub" class="fn">sub</a>(self, rhs: &<a class="struct" href="hash_set/struct.HashSet.html" title="struct hashbrown::hash_set::HashSet">HashSet</a><T, S>) -> <a class="struct" href="hash_set/struct.HashSet.html" title="struct hashbrown::hash_set::HashSet">HashSet</a><T, S></h4></section></summary><div class="docblock"><p>Returns the difference of <code>self</code> and <code>rhs</code> as a new <code>HashSet<T, S></code>.</p>
|
|||
|
|
<h5 id="examples-37"><a href="#examples-37">Examples</a></h5>
|
|||
|
|
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>hashbrown::HashSet;
|
|||
|
|
|
|||
|
|
<span class="kw">let </span>a: HashSet<<span class="kw">_</span>> = <span class="macro">vec!</span>[<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>].into_iter().collect();
|
|||
|
|
<span class="kw">let </span>b: HashSet<<span class="kw">_</span>> = <span class="macro">vec!</span>[<span class="number">3</span>, <span class="number">4</span>, <span class="number">5</span>].into_iter().collect();
|
|||
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|
|||
|
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<span class="kw">let </span>set = <span class="kw-2">&</span>a - <span class="kw-2">&</span>b;
|
|||
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|
|||
|
|
<span class="kw">let </span><span class="kw-2">mut </span>i = <span class="number">0</span>;
|
|||
|
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<span class="kw">let </span>expected = [<span class="number">1</span>, <span class="number">2</span>];
|
|||
|
|
<span class="kw">for </span>x <span class="kw">in </span><span class="kw-2">&</span>set {
|
|||
|
|
<span class="macro">assert!</span>(expected.contains(x));
|
|||
|
|
i += <span class="number">1</span>;
|
|||
|
|
}
|
|||
|
|
<span class="macro">assert_eq!</span>(i, expected.len());</code></pre></div>
|
|||
|
|
</div></details><details class="toggle" open><summary><section id="associatedtype.Output-2" class="associatedtype trait-impl"><a href="#associatedtype.Output-2" class="anchor">§</a><h4 class="code-header">type <a href="https://doc.rust-lang.org/1.76.0/core/ops/arith/trait.Sub.html#associatedtype.Output" class="associatedtype">Output</a> = <a class="struct" href="hash_set/struct.HashSet.html" title="struct hashbrown::hash_set::HashSet">HashSet</a><T, S></h4></section></summary><div class='docblock'>The resulting type after applying the <code>-</code> operator.</div></details></div></details><section id="impl-Eq-for-HashSet%3CT,+S,+A%3E" class="impl"><a class="src rightside" href="../src/hashbrown/set.rs.html#1285-1291">source</a><a href="#impl-Eq-for-HashSet%3CT,+S,+A%3E" class="anchor">§</a><h3 class="code-header">impl<T, S, A> <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/cmp/trait.Eq.html" title="trait core::cmp::Eq">Eq</a> for <a class="struct" href="hash_set/struct.HashSet.html" title="struct hashbrown::hash_set::HashSet">HashSet</a><T, S, A><div class="where">where
|
|||
|
|
T: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/cmp/trait.Eq.html" title="trait core::cmp::Eq">Eq</a> + <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/hash/trait.Hash.html" title="trait core::hash::Hash">Hash</a>,
|
|||
|
|
S: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/hash/trait.BuildHasher.html" title="trait core::hash::BuildHasher">BuildHasher</a>,
|
|||
|
|
A: Allocator,</div></h3></section></div><h2 id="synthetic-implementations" class="section-header">Auto Trait Implementations<a href="#synthetic-implementations" class="anchor">§</a></h2><div id="synthetic-implementations-list"><section id="impl-RefUnwindSafe-for-HashSet%3CT,+S,+A%3E" class="impl"><a href="#impl-RefUnwindSafe-for-HashSet%3CT,+S,+A%3E" class="anchor">§</a><h3 class="code-header">impl<T, S, A> <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/panic/unwind_safe/trait.RefUnwindSafe.html" title="trait core::panic::unwind_safe::RefUnwindSafe">RefUnwindSafe</a> for <a class="struct" href="hash_set/struct.HashSet.html" title="struct hashbrown::hash_set::HashSet">HashSet</a><T, S, A><div class="where">where
|
|||
|
|
A: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/panic/unwind_safe/trait.RefUnwindSafe.html" title="trait core::panic::unwind_safe::RefUnwindSafe">RefUnwindSafe</a>,
|
|||
|
|
S: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/panic/unwind_safe/trait.RefUnwindSafe.html" title="trait core::panic::unwind_safe::RefUnwindSafe">RefUnwindSafe</a>,
|
|||
|
|
T: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/panic/unwind_safe/trait.RefUnwindSafe.html" title="trait core::panic::unwind_safe::RefUnwindSafe">RefUnwindSafe</a>,</div></h3></section><section id="impl-Send-for-HashSet%3CT,+S,+A%3E" class="impl"><a href="#impl-Send-for-HashSet%3CT,+S,+A%3E" class="anchor">§</a><h3 class="code-header">impl<T, S, A> <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> for <a class="struct" href="hash_set/struct.HashSet.html" title="struct hashbrown::hash_set::HashSet">HashSet</a><T, S, A><div class="where">where
|
|||
|
|
A: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a>,
|
|||
|
|
S: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a>,
|
|||
|
|
T: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a>,</div></h3></section><section id="impl-Sync-for-HashSet%3CT,+S,+A%3E" class="impl"><a href="#impl-Sync-for-HashSet%3CT,+S,+A%3E" class="anchor">§</a><h3 class="code-header">impl<T, S, A> <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a> for <a class="struct" href="hash_set/struct.HashSet.html" title="struct hashbrown::hash_set::HashSet">HashSet</a><T, S, A><div class="where">where
|
|||
|
|
A: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a>,
|
|||
|
|
S: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a>,
|
|||
|
|
T: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a>,</div></h3></section><section id="impl-Unpin-for-HashSet%3CT,+S,+A%3E" class="impl"><a href="#impl-Unpin-for-HashSet%3CT,+S,+A%3E" class="anchor">§</a><h3 class="code-header">impl<T, S, A> <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a> for <a class="struct" href="hash_set/struct.HashSet.html" title="struct hashbrown::hash_set::HashSet">HashSet</a><T, S, A><div class="where">where
|
|||
|
|
A: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a>,
|
|||
|
|
S: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a>,
|
|||
|
|
T: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a>,</div></h3></section><section id="impl-UnwindSafe-for-HashSet%3CT,+S,+A%3E" class="impl"><a href="#impl-UnwindSafe-for-HashSet%3CT,+S,+A%3E" class="anchor">§</a><h3 class="code-header">impl<T, S, A> <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/panic/unwind_safe/trait.UnwindSafe.html" title="trait core::panic::unwind_safe::UnwindSafe">UnwindSafe</a> for <a class="struct" href="hash_set/struct.HashSet.html" title="struct hashbrown::hash_set::HashSet">HashSet</a><T, S, A><div class="where">where
|
|||
|
|
A: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/panic/unwind_safe/trait.UnwindSafe.html" title="trait core::panic::unwind_safe::UnwindSafe">UnwindSafe</a>,
|
|||
|
|
S: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/panic/unwind_safe/trait.UnwindSafe.html" title="trait core::panic::unwind_safe::UnwindSafe">UnwindSafe</a>,
|
|||
|
|
T: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/panic/unwind_safe/trait.UnwindSafe.html" title="trait core::panic::unwind_safe::UnwindSafe">UnwindSafe</a>,</div></h3></section></div><h2 id="blanket-implementations" class="section-header">Blanket Implementations<a href="#blanket-implementations" class="anchor">§</a></h2><div id="blanket-implementations-list"><details class="toggle implementors-toggle"><summary><section id="impl-Any-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/any.rs.html#140">source</a><a href="#impl-Any-for-T" class="anchor">§</a><h3 class="code-header">impl<T> <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/any/trait.Any.html" title="trait core::any::Any">Any</a> for T<div class="where">where
|
|||
|
|
T: 'static + ?<a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.type_id" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/any.rs.html#141">source</a><a href="#method.type_id" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/any/trait.Any.html#tymethod.type_id" class="fn">type_id</a>(&self) -> <a class="struct" href="https://doc.rust-lang.org/1.76.0/core/any/struct.TypeId.html" title="struct core::any::TypeId">TypeId</a></h4></section></summary><div class='docblock'>Gets the <code>TypeId</code> of <code>self</code>. <a href="https://doc.rust-lang.org/1.76.0/core/any/trait.Any.html#tymethod.type_id">Read more</a></div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-Borrow%3CT%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/borrow.rs.html#208">source</a><a href="#impl-Borrow%3CT%3E-for-T" class="anchor">§</a><h3 class="code-header">impl<T> <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/borrow/trait.Borrow.html" title="trait core::borrow::Borrow">Borrow</a><T> for T<div class="where">where
|
|||
|
|
T: ?<a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.borrow" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/borrow.rs.html#210">source</a><a href="#method.borrow" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/borrow/trait.Borrow.html#tymethod.borrow" class="fn">borrow</a>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/1.76.0/core/primitive.reference.html">&T</a></h4></section></summary><div class='docblock'>Immutably borrows from an owned value. <a href="https://doc.rust-lang.org/1.76.0/core/borrow/trait.Borrow.html#tymethod.borrow">Read more</a></div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-BorrowMut%3CT%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/borrow.rs.html#216">source</a><a href="#impl-BorrowMut%3CT%3E-for-T" class="anchor">§</a><h3 class="code-header">impl<T> <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/borrow/trait.BorrowMut.html" title="trait core::borrow::BorrowMut">BorrowMut</a><T> for T<div class="where">where
|
|||
|
|
T: ?<a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.borrow_mut" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/borrow.rs.html#217">source</a><a href="#method.borrow_mut" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/borrow/trait.BorrowMut.html#tymethod.borrow_mut" class="fn">borrow_mut</a>(&mut self) -> <a class="primitive" href="https://doc.rust-lang.org/1.76.0/core/primitive.reference.html">&mut T</a></h4></section></summary><div class='docblock'>Mutably borrows from an owned value. <a href="https://doc.rust-lang.org/1.76.0/core/borrow/trait.BorrowMut.html#tymethod.borrow_mut">Read more</a></div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-Equivalent%3CK%3E-for-Q" class="impl"><a class="src rightside" href="../src/hashbrown/lib.rs.html#165-173">source</a><a href="#impl-Equivalent%3CK%3E-for-Q" class="anchor">§</a><h3 class="code-header">impl<Q, K> <a class="trait" href="trait.Equivalent.html" title="trait hashbrown::Equivalent">Equivalent</a><K> for Q<div class="where">where
|
|||
|
|
Q: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/cmp/trait.Eq.html" title="trait core::cmp::Eq">Eq</a> + ?<a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,
|
|||
|
|
K: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/borrow/trait.Borrow.html" title="trait core::borrow::Borrow">Borrow</a><Q> + ?<a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.equivalent" class="method trait-impl"><a class="src rightside" href="../src/hashbrown/lib.rs.html#170-172">source</a><a href="#method.equivalent" class="anchor">§</a><h4 class="code-header">fn <a href="trait.Equivalent.html#tymethod.equivalent" class="fn">equivalent</a>(&self, key: <a class="primitive" href="https://doc.rust-lang.org/1.76.0/core/primitive.reference.html">&K</a>) -> <a class="primitive" href="https://doc.rust-lang.org/1.76.0/core/primitive.bool.html">bool</a></h4></section></summary><div class='docblock'>Checks if this value is equivalent to the given key. <a href="trait.Equivalent.html#tymethod.equivalent">Read more</a></div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-From%3CT%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/convert/mod.rs.html#763">source</a><a href="#impl-From%3CT%3E-for-T" class="anchor">§</a><h3 class="code-header">impl<T> <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.From.html" title="trait core::convert::From">From</a><T> for T</h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.from-1" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/convert/mod.rs.html#766">source</a><a href="#method.from-1" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/convert/trait.From.html#tymethod.from" class="fn">from</a>(t: T) -> T</h4></section></summary><div class="docblock"><p>Returns the argument unchanged.</p>
|
|||
|
|
</div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-Into%3CU%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/convert/mod.rs.html#747-749">source</a><a href="#impl-Into%3CU%3E-for-T" class="anchor">§</a><h3 class="code-header">impl<T, U> <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a><U> for T<div class="where">where
|
|||
|
|
U: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.From.html" title="trait core::convert::From">From</a><T>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.into" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/convert/mod.rs.html#756">source</a><a href="#method.into" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/convert/trait.Into.html#tymethod.into" class="fn">into</a>(self) -> U</h4></section></summary><div class="docblock"><p>Calls <code>U::from(self)</code>.</p>
|
|||
|
|
<p>That is, this conversion is whatever the implementation of
|
|||
|
|
<code><a href="https://doc.rust-lang.org/1.76.0/core/convert/trait.From.html" title="trait core::convert::From">From</a><T> for U</code> chooses to do.</p>
|
|||
|
|
</div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-ToOwned-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/alloc/borrow.rs.html#83-85">source</a><a href="#impl-ToOwned-for-T" class="anchor">§</a><h3 class="code-header">impl<T> <a class="trait" href="https://doc.rust-lang.org/1.76.0/alloc/borrow/trait.ToOwned.html" title="trait alloc::borrow::ToOwned">ToOwned</a> for T<div class="where">where
|
|||
|
|
T: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle" open><summary><section id="associatedtype.Owned" class="associatedtype trait-impl"><a href="#associatedtype.Owned" class="anchor">§</a><h4 class="code-header">type <a href="https://doc.rust-lang.org/1.76.0/alloc/borrow/trait.ToOwned.html#associatedtype.Owned" class="associatedtype">Owned</a> = T</h4></section></summary><div class='docblock'>The resulting type after obtaining ownership.</div></details><details class="toggle method-toggle" open><summary><section id="method.to_owned" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/alloc/borrow.rs.html#88">source</a><a href="#method.to_owned" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/alloc/borrow/trait.ToOwned.html#tymethod.to_owned" class="fn">to_owned</a>(&self) -> T</h4></section></summary><div class='docblock'>Creates owned data from borrowed data, usually by cloning. <a href="https://doc.rust-lang.org/1.76.0/alloc/borrow/trait.ToOwned.html#tymethod.to_owned">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.clone_into" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/alloc/borrow.rs.html#92">source</a><a href="#method.clone_into" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/alloc/borrow/trait.ToOwned.html#method.clone_into" class="fn">clone_into</a>(&self, target: <a class="primitive" href="https://doc.rust-lang.org/1.76.0/core/primitive.reference.html">&mut T</a>)</h4></section></summary><div class='docblock'>Uses borrowed data to replace owned data, usually by cloning. <a href="https://doc.rust-lang.org/1.76.0/alloc/borrow/trait.ToOwned.html#method.clone_into">Read more</a></div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-TryFrom%3CU%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/convert/mod.rs.html#803-805">source</a><a href="#impl-TryFrom%3CU%3E-for-T" class="anchor">§</a><h3 class="code-header">impl<T, U> <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><U> for T<div class="where">where
|
|||
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U: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a><T>,</div></h3></section></summary><div class="impl-items"><details class="toggle" open><summary><section id="associatedtype.Error" class="associatedtype trait-impl"><a href="#associatedtype.Error" class="anchor">§</a><h4 class="code-header">type <a href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html#associatedtype.Error" class="associatedtype">Error</a> = <a class="enum" href="https://doc.rust-lang.org/1.76.0/core/convert/enum.Infallible.html" title="enum core::convert::Infallible">Infallible</a></h4></section></summary><div class='docblock'>The type returned in the event of a conversion error.</div></details><details class="toggle method-toggle" open><summary><section id="method.try_from" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/convert/mod.rs.html#810">source</a><a href="#method.try_from" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html#tymethod.try_from" class="fn">try_from</a>(value: U) -> <a class="enum" href="https://doc.rust-lang.org/1.76.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a><T, <T as <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><U>>::<a class="associatedtype" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a>></h4></section></summary><div class='docblock'>Performs the conversion.</div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-TryInto%3CU%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/convert/mod.rs.html#788-790">source</a><a href="#impl-TryInto%3CU%3E-for-T" class="anchor">§</a><h3 class="code-header">impl<T, U> <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryInto.html" title="trait core::convert::TryInto">TryInto</a><U> for T<div class="where">where
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U: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><T>,</div></h3></section></summary><div class="impl-items"><details class="toggle" open><summary><section id="associatedtype.Error-1" class="associatedtype trait-impl"><a href="#associatedtype.Error-1" class="anchor">§</a><h4 class="code-header">type <a href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryInto.html#associatedtype.Error" class="associatedtype">Error</a> = <U as <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><T>>::<a class="associatedtype" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a></h4></section></summary><div class='docblock'>The type returned in the event of a conversion error.</div></details><details class="toggle method-toggle" open><summary><section id="method.try_into" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/convert/mod.rs.html#795">source</a><a href="#method.try_into" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryInto.html#tymethod.try_into" class="fn">try_into</a>(self) -> <a class="enum" href="https://doc.rust-lang.org/1.76.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a><U, <U as <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><T>>::<a class="associatedtype" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a>></h4></section></summary><div class='docblock'>Performs the conversion.</div></details></div></details></div><script type="text/json" id="notable-traits-data">{"Difference<'a, T, S, A>":"<h3>Notable traits for <code><a class=\"struct\" href=\"hash_set/struct.Difference.html\" title=\"struct hashbrown::hash_set::Difference\">Difference</a><'a, T, S, A></code></h3><pre><code><div class=\"where\">impl<'a, T, S, A> <a class=\"trait\" href=\"https://doc.rust-lang.org/1.76.0/core/iter/traits/iterator/trait.Iterator.html\" title=\"trait core::iter::traits::iterator::Iterator\">Iterator</a> for <a class=\"struct\" href=\"hash_set/struct.Difference.html\" title=\"struct hashbrown::hash_set::Difference\">Difference</a><'a, T, S, A><div class=\"where\">where\n T: <a class=\"trait\" href=\"https://doc.rust-lang.org/1.76.0/core/cmp/trait.Eq.html\" title=\"trait core::cmp::Eq\">Eq</a> + <a class=\"trait\" href=\"https://doc.rust-lang.org/1.76.0/core/hash/trait.Hash.html\" title=\"trait core::hash::Hash\">Hash</a>,\n S: <a class=\"trait\" href=\"https://doc.rust-lang.org/1.76.0/core/hash/trait.BuildHasher.html\" title=\"trait core::hash::BuildHasher\">BuildHasher</a>,\n A: Allocator,</div></div><div class=\"where\"> type <a href=\"https://doc.rust-lang.org/1.76.0/core/iter/traits/iterator/trait.Iterator.html#associatedtype.Item\" class=\"associatedtype\">Item</a> = <a class=\"primitive\" href=\"https://doc.rust-lang.org/1.76.0/core/primitive.reference.html\">&'a T</a>;</div>","Drain<'_, T, A>":"<h3>Notable traits for <code><a class=\"struct\" href=\"hash_set/struct.Drain.html\" title=\"struct hashbrown::hash_set::Drain\">Drain</a><'_, K, A></code></h3><pre><code><div class=\"where\">impl<K, A: Allocator> <a class=\"trait\" href=\"https://doc.rust-lang.org/1.76.0/core/iter/traits/iterator/trait.Iterator.html\" title=\"trait core::iter::traits::iterator::Iterator\">Iterator</a> for <a class=\"struct\" href=\"hash_set/struct.Drain.html\" title=\"struct hashbrown::hash_set::Drain\">Drain</a><'_, K, A></div><div class=\"where\"> type <a href=\"https://doc.rust-lang.org/1.76.0/core/iter/traits/iterator/trait.Iterator.html#associatedtype.Item\" class=
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