<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Source to the Rust file `liballoc/btree/set.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>set.rs.html -- source</title><link rel="stylesheet" type="text/css" href="../../../normalize.css"><link rel="stylesheet" type="text/css" href="../../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../../../dark.css"><link rel="stylesheet" type="text/css" href="../../../light.css" id="themeStyle"><script src="../../../storage.js"></script><link rel="shortcut icon" href="https://doc.rust-lang.org/favicon.ico"></head><body class="rustdoc source"><!--[if lte IE 8]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu">☰</div><a href='../../../alloc/index.html'><img src='https://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png' alt='logo' width='100'></a></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!"><img src="../../../brush.svg" width="18" alt="Pick another theme!"></button><div id="theme-choices"></div></div><script src="../../../theme.js"></script><nav class="sub"><form class="search-form js-only"><div class="search-container"><input class="search-input" name="search" autocomplete="off" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><a id="settings-menu" href="../../../settings.html"><img src="../../../wheel.svg" width="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><pre class="line-numbers"><span id="1"> 1</span>
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</pre><pre class="rust ">
<span class="comment">// Copyright 2014 The Rust Project Developers. See the COPYRIGHT</span>
<span class="comment">// file at the top-level directory of this distribution and at</span>
<span class="comment">// http://rust-lang.org/COPYRIGHT.</span>
<span class="comment">//</span>
<span class="comment">// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or</span>
<span class="comment">// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license</span>
<span class="comment">// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your</span>
<span class="comment">// option. This file may not be copied, modified, or distributed</span>
<span class="comment">// except according to those terms.</span>
<span class="comment">// This is pretty much entirely stolen from TreeSet, since BTreeMap has an identical interface</span>
<span class="comment">// to TreeMap</span>
<span class="kw">use</span> <span class="ident">core</span>::<span class="ident">cmp</span>::<span class="ident">Ordering</span>::{<span class="self">self</span>, <span class="ident">Less</span>, <span class="ident">Greater</span>, <span class="ident">Equal</span>};
<span class="kw">use</span> <span class="ident">core</span>::<span class="ident">cmp</span>::{<span class="ident">min</span>, <span class="ident">max</span>};
<span class="kw">use</span> <span class="ident">core</span>::<span class="ident">fmt</span>::<span class="ident">Debug</span>;
<span class="kw">use</span> <span class="ident">core</span>::<span class="ident">fmt</span>;
<span class="kw">use</span> <span class="ident">core</span>::<span class="ident">iter</span>::{<span class="ident">Peekable</span>, <span class="ident">FromIterator</span>, <span class="ident">FusedIterator</span>};
<span class="kw">use</span> <span class="ident">core</span>::<span class="ident">ops</span>::{<span class="ident">BitOr</span>, <span class="ident">BitAnd</span>, <span class="ident">BitXor</span>, <span class="ident">Sub</span>, <span class="ident">RangeBounds</span>};
<span class="kw">use</span> <span class="ident">borrow</span>::<span class="ident">Borrow</span>;
<span class="kw">use</span> <span class="ident">btree_map</span>::{<span class="ident">BTreeMap</span>, <span class="ident">Keys</span>};
<span class="kw">use</span> <span class="kw">super</span>::<span class="ident">Recover</span>;
<span class="comment">// FIXME(conventions): implement bounded iterators</span>
<span class="doccomment">/// A set based on a B-Tree.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// See [`BTreeMap`]'s documentation for a detailed discussion of this collection's performance</span>
<span class="doccomment">/// benefits and drawbacks.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// It is a logic error for an item to be modified in such a way that the item's ordering relative</span>
<span class="doccomment">/// to any other item, as determined by the [`Ord`] trait, changes while it is in the set. This is</span>
<span class="doccomment">/// normally only possible through [`Cell`], [`RefCell`], global state, I/O, or unsafe code.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [`BTreeMap`]: struct.BTreeMap.html</span>
<span class="doccomment">/// [`Ord`]: ../../std/cmp/trait.Ord.html</span>
<span class="doccomment">/// [`Cell`]: ../../std/cell/struct.Cell.html</span>
<span class="doccomment">/// [`RefCell`]: ../../std/cell/struct.RefCell.html</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use std::collections::BTreeSet;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// // Type inference lets us omit an explicit type signature (which</span>
<span class="doccomment">/// // would be `BTreeSet<&str>` in this example).</span>
<span class="doccomment">/// let mut books = BTreeSet::new();</span>
<span class="doccomment">///</span>
<span class="doccomment">/// // Add some books.</span>
<span class="doccomment">/// books.insert("A Dance With Dragons");</span>
<span class="doccomment">/// books.insert("To Kill a Mockingbird");</span>
<span class="doccomment">/// books.insert("The Odyssey");</span>
<span class="doccomment">/// books.insert("The Great Gatsby");</span>
<span class="doccomment">///</span>
<span class="doccomment">/// // Check for a specific one.</span>
<span class="doccomment">/// if !books.contains("The Winds of Winter") {</span>
<span class="doccomment">/// println!("We have {} books, but The Winds of Winter ain't one.",</span>
<span class="doccomment">/// books.len());</span>
<span class="doccomment">/// }</span>
<span class="doccomment">///</span>
<span class="doccomment">/// // Remove a book.</span>
<span class="doccomment">/// books.remove("The Odyssey");</span>
<span class="doccomment">///</span>
<span class="doccomment">/// // Iterate over everything.</span>
<span class="doccomment">/// for book in &books {</span>
<span class="doccomment">/// println!("{}", book);</span>
<span class="doccomment">/// }</span>
<span class="doccomment">/// ```</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>, <span class="ident">Hash</span>, <span class="ident">PartialEq</span>, <span class="ident">Eq</span>, <span class="ident">Ord</span>, <span class="ident">PartialOrd</span>)]</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"rust1"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">BTreeSet</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {
<span class="ident">map</span>: <span class="ident">BTreeMap</span><span class="op"><</span><span class="ident">T</span>, ()<span class="op">></span>,
}
<span class="doccomment">/// An iterator over the items of a `BTreeSet`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// This `struct` is created by the [`iter`] method on [`BTreeSet`].</span>
<span class="doccomment">/// See its documentation for more.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [`BTreeSet`]: struct.BTreeSet.html</span>
<span class="doccomment">/// [`iter`]: struct.BTreeSet.html#method.iter</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"rust1"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Iter</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span>: <span class="lifetime">'a</span><span class="op">></span> {
<span class="ident">iter</span>: <span class="ident">Keys</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span>, ()<span class="op">></span>,
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"collection_debug"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.17.0"</span>)]</span>
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span>: <span class="lifetime">'a</span> <span class="op">+</span> <span class="ident">fmt</span>::<span class="ident">Debug</span><span class="op">></span> <span class="ident">fmt</span>::<span class="ident">Debug</span> <span class="kw">for</span> <span class="ident">Iter</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> {
<span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-></span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> {
<span class="ident">f</span>.<span class="ident">debug_tuple</span>(<span class="string">"Iter"</span>)
.<span class="ident">field</span>(<span class="kw-2">&</span><span class="self">self</span>.<span class="ident">iter</span>.<span class="ident">clone</span>())
.<span class="ident">finish</span>()
}
}
<span class="doccomment">/// An owning iterator over the items of a `BTreeSet`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// This `struct` is created by the [`into_iter`] method on [`BTreeSet`][`BTreeSet`]</span>
<span class="doccomment">/// (provided by the `IntoIterator` trait). See its documentation for more.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [`BTreeSet`]: struct.BTreeSet.html</span>
<span class="doccomment">/// [`into_iter`]: struct.BTreeSet.html#method.into_iter</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"rust1"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Debug</span>)]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">IntoIter</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {
<span class="ident">iter</span>: ::<span class="ident">btree_map</span>::<span class="ident">IntoIter</span><span class="op"><</span><span class="ident">T</span>, ()<span class="op">></span>,
}
<span class="doccomment">/// An iterator over a sub-range of items in a `BTreeSet`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// This `struct` is created by the [`range`] method on [`BTreeSet`].</span>
<span class="doccomment">/// See its documentation for more.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [`BTreeSet`]: struct.BTreeSet.html</span>
<span class="doccomment">/// [`range`]: struct.BTreeSet.html#method.range</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Debug</span>)]</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"btree_range"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.17.0"</span>)]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Range</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span>: <span class="lifetime">'a</span><span class="op">></span> {
<span class="ident">iter</span>: ::<span class="ident">btree_map</span>::<span class="ident">Range</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span>, ()<span class="op">></span>,
}
<span class="doccomment">/// A lazy iterator producing elements in the difference of `BTreeSet`s.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// This `struct` is created by the [`difference`] method on [`BTreeSet`].</span>
<span class="doccomment">/// See its documentation for more.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [`BTreeSet`]: struct.BTreeSet.html</span>
<span class="doccomment">/// [`difference`]: struct.BTreeSet.html#method.difference</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"rust1"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Difference</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span>: <span class="lifetime">'a</span><span class="op">></span> {
<span class="ident">a</span>: <span class="ident">Peekable</span><span class="op"><</span><span class="ident">Iter</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">>></span>,
<span class="ident">b</span>: <span class="ident">Peekable</span><span class="op"><</span><span class="ident">Iter</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">>></span>,
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"collection_debug"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.17.0"</span>)]</span>
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span>: <span class="lifetime">'a</span> <span class="op">+</span> <span class="ident">fmt</span>::<span class="ident">Debug</span><span class="op">></span> <span class="ident">fmt</span>::<span class="ident">Debug</span> <span class="kw">for</span> <span class="ident">Difference</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> {
<span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-></span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> {
<span class="ident">f</span>.<span class="ident">debug_tuple</span>(<span class="string">"Difference"</span>)
.<span class="ident">field</span>(<span class="kw-2">&</span><span class="self">self</span>.<span class="ident">a</span>)
.<span class="ident">field</span>(<span class="kw-2">&</span><span class="self">self</span>.<span class="ident">b</span>)
.<span class="ident">finish</span>()
}
}
<span class="doccomment">/// A lazy iterator producing elements in the symmetric difference of `BTreeSet`s.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// This `struct` is created by the [`symmetric_difference`] method on</span>
<span class="doccomment">/// [`BTreeSet`]. See its documentation for more.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [`BTreeSet`]: struct.BTreeSet.html</span>
<span class="doccomment">/// [`symmetric_difference`]: struct.BTreeSet.html#method.symmetric_difference</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"rust1"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">SymmetricDifference</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span>: <span class="lifetime">'a</span><span class="op">></span> {
<span class="ident">a</span>: <span class="ident">Peekable</span><span class="op"><</span><span class="ident">Iter</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">>></span>,
<span class="ident">b</span>: <span class="ident">Peekable</span><span class="op"><</span><span class="ident">Iter</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">>></span>,
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"collection_debug"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.17.0"</span>)]</span>
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span>: <span class="lifetime">'a</span> <span class="op">+</span> <span class="ident">fmt</span>::<span class="ident">Debug</span><span class="op">></span> <span class="ident">fmt</span>::<span class="ident">Debug</span> <span class="kw">for</span> <span class="ident">SymmetricDifference</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> {
<span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-></span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> {
<span class="ident">f</span>.<span class="ident">debug_tuple</span>(<span class="string">"SymmetricDifference"</span>)
.<span class="ident">field</span>(<span class="kw-2">&</span><span class="self">self</span>.<span class="ident">a</span>)
.<span class="ident">field</span>(<span class="kw-2">&</span><span class="self">self</span>.<span class="ident">b</span>)
.<span class="ident">finish</span>()
}
}
<span class="doccomment">/// A lazy iterator producing elements in the intersection of `BTreeSet`s.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// This `struct` is created by the [`intersection`] method on [`BTreeSet`].</span>
<span class="doccomment">/// See its documentation for more.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [`BTreeSet`]: struct.BTreeSet.html</span>
<span class="doccomment">/// [`intersection`]: struct.BTreeSet.html#method.intersection</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"rust1"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Intersection</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span>: <span class="lifetime">'a</span><span class="op">></span> {
<span class="ident">a</span>: <span class="ident">Peekable</span><span class="op"><</span><span class="ident">Iter</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">>></span>,
<span class="ident">b</span>: <span class="ident">Peekable</span><span class="op"><</span><span class="ident">Iter</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">>></span>,
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"collection_debug"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.17.0"</span>)]</span>
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span>: <span class="lifetime">'a</span> <span class="op">+</span> <span class="ident">fmt</span>::<span class="ident">Debug</span><span class="op">></span> <span class="ident">fmt</span>::<span class="ident">Debug</span> <span class="kw">for</span> <span class="ident">Intersection</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> {
<span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-></span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> {
<span class="ident">f</span>.<span class="ident">debug_tuple</span>(<span class="string">"Intersection"</span>)
.<span class="ident">field</span>(<span class="kw-2">&</span><span class="self">self</span>.<span class="ident">a</span>)
.<span class="ident">field</span>(<span class="kw-2">&</span><span class="self">self</span>.<span class="ident">b</span>)
.<span class="ident">finish</span>()
}
}
<span class="doccomment">/// A lazy iterator producing elements in the union of `BTreeSet`s.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// This `struct` is created by the [`union`] method on [`BTreeSet`].</span>
<span class="doccomment">/// See its documentation for more.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [`BTreeSet`]: struct.BTreeSet.html</span>
<span class="doccomment">/// [`union`]: struct.BTreeSet.html#method.union</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"rust1"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Union</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span>: <span class="lifetime">'a</span><span class="op">></span> {
<span class="ident">a</span>: <span class="ident">Peekable</span><span class="op"><</span><span class="ident">Iter</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">>></span>,
<span class="ident">b</span>: <span class="ident">Peekable</span><span class="op"><</span><span class="ident">Iter</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">>></span>,
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"collection_debug"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.17.0"</span>)]</span>
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span>: <span class="lifetime">'a</span> <span class="op">+</span> <span class="ident">fmt</span>::<span class="ident">Debug</span><span class="op">></span> <span class="ident">fmt</span>::<span class="ident">Debug</span> <span class="kw">for</span> <span class="ident">Union</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> {
<span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-></span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> {
<span class="ident">f</span>.<span class="ident">debug_tuple</span>(<span class="string">"Union"</span>)
.<span class="ident">field</span>(<span class="kw-2">&</span><span class="self">self</span>.<span class="ident">a</span>)
.<span class="ident">field</span>(<span class="kw-2">&</span><span class="self">self</span>.<span class="ident">b</span>)
.<span class="ident">finish</span>()
}
}
<span class="kw">impl</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">Ord</span><span class="op">></span> <span class="ident">BTreeSet</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {
<span class="doccomment">/// Makes a new `BTreeSet` with a reasonable choice of B.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// # #![allow(unused_mut)]</span>
<span class="doccomment">/// use std::collections::BTreeSet;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let mut set: BTreeSet<i32> = BTreeSet::new();</span>
<span class="doccomment">/// ```</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"rust1"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">new</span>() <span class="op">-></span> <span class="ident">BTreeSet</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {
<span class="ident">BTreeSet</span> { <span class="ident">map</span>: <span class="ident">BTreeMap</span>::<span class="ident">new</span>() }
}
<span class="doccomment">/// Constructs a double-ended iterator over a sub-range of elements in the set.</span>
<span class="doccomment">/// The simplest way is to use the range syntax `min..max`, thus `range(min..max)` will</span>
<span class="doccomment">/// yield elements from min (inclusive) to max (exclusive).</span>
<span class="doccomment">/// The range may also be entered as `(Bound<T>, Bound<T>)`, so for example</span>
<span class="doccomment">/// `range((Excluded(4), Included(10)))` will yield a left-exclusive, right-inclusive</span>
<span class="doccomment">/// range from 4 to 10.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use std::collections::BTreeSet;</span>
<span class="doccomment">/// use std::ops::Bound::Included;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let mut set = BTreeSet::new();</span>
<span class="doccomment">/// set.insert(3);</span>
<span class="doccomment">/// set.insert(5);</span>
<span class="doccomment">/// set.insert(8);</span>
<span class="doccomment">/// for &elem in set.range((Included(&4), Included(&8))) {</span>
<span class="doccomment">/// println!("{}", elem);</span>
<span class="doccomment">/// }</span>
<span class="doccomment">/// assert_eq!(Some(&5), set.range(4..).next());</span>
<span class="doccomment">/// ```</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"btree_range"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.17.0"</span>)]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">range</span><span class="op"><</span><span class="ident">K</span>: <span class="question-mark">?</span><span class="ident">Sized</span>, <span class="ident">R</span><span class="op">></span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">range</span>: <span class="ident">R</span>) <span class="op">-></span> <span class="ident">Range</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>
<span class="kw">where</span> <span class="ident">K</span>: <span class="ident">Ord</span>, <span class="ident">T</span>: <span class="ident">Borrow</span><span class="op"><</span><span class="ident">K</span><span class="op">></span>, <span class="ident">R</span>: <span class="ident">RangeBounds</span><span class="op"><</span><span class="ident">K</span><span class="op">></span>
{
<span class="ident">Range</span> { <span class="ident">iter</span>: <span class="self">self</span>.<span class="ident">map</span>.<span class="ident">range</span>(<span class="ident">range</span>) }
}
<span class="doccomment">/// Visits the values representing the difference,</span>
<span class="doccomment">/// i.e. the values that are in `self` but not in `other`,</span>
<span class="doccomment">/// in ascending order.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use std::collections::BTreeSet;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let mut a = BTreeSet::new();</span>
<span class="doccomment">/// a.insert(1);</span>
<span class="doccomment">/// a.insert(2);</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let mut b = BTreeSet::new();</span>
<span class="doccomment">/// b.insert(2);</span>
<span class="doccomment">/// b.insert(3);</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let diff: Vec<_> = a.difference(&b).cloned().collect();</span>
<span class="doccomment">/// assert_eq!(diff, [1]);</span>
<span class="doccomment">/// ```</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"rust1"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">difference</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span>(<span class="kw-2">&</span><span class="lifetime">'a</span> <span class="self">self</span>, <span class="ident">other</span>: <span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">BTreeSet</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>) <span class="op">-></span> <span class="ident">Difference</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> {
<span class="ident">Difference</span> {
<span class="ident">a</span>: <span class="self">self</span>.<span class="ident">iter</span>().<span class="ident">peekable</span>(),
<span class="ident">b</span>: <span class="ident">other</span>.<span class="ident">iter</span>().<span class="ident">peekable</span>(),
}
}
<span class="doccomment">/// Visits the values representing the symmetric difference,</span>
<span class="doccomment">/// i.e. the values that are in `self` or in `other` but not in both,</span>
<span class="doccomment">/// in ascending order.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use std::collections::BTreeSet;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let mut a = BTreeSet::new();</span>
<span class="doccomment">/// a.insert(1);</span>
<span class="doccomment">/// a.insert(2);</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let mut b = BTreeSet::new();</span>
<span class="doccomment">/// b.insert(2);</span>
<span class="doccomment">/// b.insert(3);</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let sym_diff: Vec<_> = a.symmetric_difference(&b).cloned().collect();</span>
<span class="doccomment">/// assert_eq!(sym_diff, [1, 3]);</span>
<span class="doccomment">/// ```</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"rust1"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">symmetric_difference</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span>(<span class="kw-2">&</span><span class="lifetime">'a</span> <span class="self">self</span>,
<span class="ident">other</span>: <span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">BTreeSet</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>)
<span class="op">-></span> <span class="ident">SymmetricDifference</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> {
<span class="ident">SymmetricDifference</span> {
<span class="ident">a</span>: <span class="self">self</span>.<span class="ident">iter</span>().<span class="ident">peekable</span>(),
<span class="ident">b</span>: <span class="ident">other</span>.<span class="ident">iter</span>().<span class="ident">peekable</span>(),
}
}
<span class="doccomment">/// Visits the values representing the intersection,</span>
<span class="doccomment">/// i.e. the values that are both in `self` and `other`,</span>
<span class="doccomment">/// in ascending order.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use std::collections::BTreeSet;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let mut a = BTreeSet::new();</span>
<span class="doccomment">/// a.insert(1);</span>
<span class="doccomment">/// a.insert(2);</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let mut b = BTreeSet::new();</span>
<span class="doccomment">/// b.insert(2);</span>
<span class="doccomment">/// b.insert(3);</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let intersection: Vec<_> = a.intersection(&b).cloned().collect();</span>
<span class="doccomment">/// assert_eq!(intersection, [2]);</span>
<span class="doccomment">/// ```</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"rust1"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">intersection</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span>(<span class="kw-2">&</span><span class="lifetime">'a</span> <span class="self">self</span>, <span class="ident">other</span>: <span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">BTreeSet</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>) <span class="op">-></span> <span class="ident">Intersection</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> {
<span class="ident">Intersection</span> {
<span class="ident">a</span>: <span class="self">self</span>.<span class="ident">iter</span>().<span class="ident">peekable</span>(),
<span class="ident">b</span>: <span class="ident">other</span>.<span class="ident">iter</span>().<span class="ident">peekable</span>(),
}
}
<span class="doccomment">/// Visits the values representing the union,</span>
<span class="doccomment">/// i.e. all the values in `self` or `other`, without duplicates,</span>
<span class="doccomment">/// in ascending order.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use std::collections::BTreeSet;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let mut a = BTreeSet::new();</span>
<span class="doccomment">/// a.insert(1);</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let mut b = BTreeSet::new();</span>
<span class="doccomment">/// b.insert(2);</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let union: Vec<_> = a.union(&b).cloned().collect();</span>
<span class="doccomment">/// assert_eq!(union, [1, 2]);</span>
<span class="doccomment">/// ```</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"rust1"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">union</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span>(<span class="kw-2">&</span><span class="lifetime">'a</span> <span class="self">self</span>, <span class="ident">other</span>: <span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">BTreeSet</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>) <span class="op">-></span> <span class="ident">Union</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> {
<span class="ident">Union</span> {
<span class="ident">a</span>: <span class="self">self</span>.<span class="ident">iter</span>().<span class="ident">peekable</span>(),
<span class="ident">b</span>: <span class="ident">other</span>.<span class="ident">iter</span>().<span class="ident">peekable</span>(),
}
}
<span class="doccomment">/// Clears the set, removing all values.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use std::collections::BTreeSet;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let mut v = BTreeSet::new();</span>
<span class="doccomment">/// v.insert(1);</span>
<span class="doccomment">/// v.clear();</span>
<span class="doccomment">/// assert!(v.is_empty());</span>
<span class="doccomment">/// ```</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"rust1"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">clear</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) {
<span class="self">self</span>.<span class="ident">map</span>.<span class="ident">clear</span>()
}
<span class="doccomment">/// Returns `true` if the set contains a value.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// The value may be any borrowed form of the set's value type,</span>
<span class="doccomment">/// but the ordering on the borrowed form *must* match the</span>
<span class="doccomment">/// ordering on the value type.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use std::collections::BTreeSet;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let set: BTreeSet<_> = [1, 2, 3].iter().cloned().collect();</span>
<span class="doccomment">/// assert_eq!(set.contains(&1), true);</span>
<span class="doccomment">/// assert_eq!(set.contains(&4), false);</span>
<span class="doccomment">/// ```</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"rust1"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">contains</span><span class="op"><</span><span class="ident">Q</span>: <span class="question-mark">?</span><span class="ident">Sized</span><span class="op">></span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">value</span>: <span class="kw-2">&</span><span class="ident">Q</span>) <span class="op">-></span> <span class="ident">bool</span>
<span class="kw">where</span> <span class="ident">T</span>: <span class="ident">Borrow</span><span class="op"><</span><span class="ident">Q</span><span class="op">></span>,
<span class="ident">Q</span>: <span class="ident">Ord</span>
{
<span class="self">self</span>.<span class="ident">map</span>.<span class="ident">contains_key</span>(<span class="ident">value</span>)
}
<span class="doccomment">/// Returns a reference to the value in the set, if any, that is equal to the given value.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// The value may be any borrowed form of the set's value type,</span>
<span class="doccomment">/// but the ordering on the borrowed form *must* match the</span>
<span class="doccomment">/// ordering on the value type.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use std::collections::BTreeSet;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let set: BTreeSet<_> = [1, 2, 3].iter().cloned().collect();</span>
<span class="doccomment">/// assert_eq!(set.get(&2), Some(&2));</span>
<span class="doccomment">/// assert_eq!(set.get(&4), None);</span>
<span class="doccomment">/// ```</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"set_recovery"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.9.0"</span>)]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">get</span><span class="op"><</span><span class="ident">Q</span>: <span class="question-mark">?</span><span class="ident">Sized</span><span class="op">></span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">value</span>: <span class="kw-2">&</span><span class="ident">Q</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">T</span><span class="op">></span>
<span class="kw">where</span> <span class="ident">T</span>: <span class="ident">Borrow</span><span class="op"><</span><span class="ident">Q</span><span class="op">></span>,
<span class="ident">Q</span>: <span class="ident">Ord</span>
{
<span class="ident">Recover</span>::<span class="ident">get</span>(<span class="kw-2">&</span><span class="self">self</span>.<span class="ident">map</span>, <span class="ident">value</span>)
}
<span class="doccomment">/// Returns `true` if `self` has no elements in common with `other`.</span>
<span class="doccomment">/// This is equivalent to checking for an empty intersection.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use std::collections::BTreeSet;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let a: BTreeSet<_> = [1, 2, 3].iter().cloned().collect();</span>
<span class="doccomment">/// let mut b = BTreeSet::new();</span>
<span class="doccomment">///</span>
<span class="doccomment">/// assert_eq!(a.is_disjoint(&b), true);</span>
<span class="doccomment">/// b.insert(4);</span>
<span class="doccomment">/// assert_eq!(a.is_disjoint(&b), true);</span>
<span class="doccomment">/// b.insert(1);</span>
<span class="doccomment">/// assert_eq!(a.is_disjoint(&b), false);</span>
<span class="doccomment">/// ```</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"rust1"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">is_disjoint</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">other</span>: <span class="kw-2">&</span><span class="ident">BTreeSet</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>) <span class="op">-></span> <span class="ident">bool</span> {
<span class="self">self</span>.<span class="ident">intersection</span>(<span class="ident">other</span>).<span class="ident">next</span>().<span class="ident">is_none</span>()
}
<span class="doccomment">/// Returns `true` if the set is a subset of another,</span>
<span class="doccomment">/// i.e. `other` contains at least all the values in `self`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use std::collections::BTreeSet;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let sup: BTreeSet<_> = [1, 2, 3].iter().cloned().collect();</span>
<span class="doccomment">/// let mut set = BTreeSet::new();</span>
<span class="doccomment">///</span>
<span class="doccomment">/// assert_eq!(set.is_subset(&sup), true);</span>
<span class="doccomment">/// set.insert(2);</span>
<span class="doccomment">/// assert_eq!(set.is_subset(&sup), true);</span>
<span class="doccomment">/// set.insert(4);</span>
<span class="doccomment">/// assert_eq!(set.is_subset(&sup), false);</span>
<span class="doccomment">/// ```</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"rust1"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">is_subset</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">other</span>: <span class="kw-2">&</span><span class="ident">BTreeSet</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>) <span class="op">-></span> <span class="ident">bool</span> {
<span class="comment">// Stolen from TreeMap</span>
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">x</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">iter</span>();
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">y</span> <span class="op">=</span> <span class="ident">other</span>.<span class="ident">iter</span>();
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">a</span> <span class="op">=</span> <span class="ident">x</span>.<span class="ident">next</span>();
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">b</span> <span class="op">=</span> <span class="ident">y</span>.<span class="ident">next</span>();
<span class="kw">while</span> <span class="ident">a</span>.<span class="ident">is_some</span>() {
<span class="kw">if</span> <span class="ident">b</span>.<span class="ident">is_none</span>() {
<span class="kw">return</span> <span class="bool-val">false</span>;
}
<span class="kw">let</span> <span class="ident">a1</span> <span class="op">=</span> <span class="ident">a</span>.<span class="ident">unwrap</span>();
<span class="kw">let</span> <span class="ident">b1</span> <span class="op">=</span> <span class="ident">b</span>.<span class="ident">unwrap</span>();
<span class="kw">match</span> <span class="ident">b1</span>.<span class="ident">cmp</span>(<span class="ident">a1</span>) {
<span class="ident">Less</span> <span class="op">=></span> (),
<span class="ident">Greater</span> <span class="op">=></span> <span class="kw">return</span> <span class="bool-val">false</span>,
<span class="ident">Equal</span> <span class="op">=></span> <span class="ident">a</span> <span class="op">=</span> <span class="ident">x</span>.<span class="ident">next</span>(),
}
<span class="ident">b</span> <span class="op">=</span> <span class="ident">y</span>.<span class="ident">next</span>();
}
<span class="bool-val">true</span>
}
<span class="doccomment">/// Returns `true` if the set is a superset of another,</span>
<span class="doccomment">/// i.e. `self` contains at least all the values in `other`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use std::collections::BTreeSet;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let sub: BTreeSet<_> = [1, 2].iter().cloned().collect();</span>
<span class="doccomment">/// let mut set = BTreeSet::new();</span>
<span class="doccomment">///</span>
<span class="doccomment">/// assert_eq!(set.is_superset(&sub), false);</span>
<span class="doccomment">///</span>
<span class="doccomment">/// set.insert(0);</span>
<span class="doccomment">/// set.insert(1);</span>
<span class="doccomment">/// assert_eq!(set.is_superset(&sub), false);</span>
<span class="doccomment">///</span>
<span class="doccomment">/// set.insert(2);</span>
<span class="doccomment">/// assert_eq!(set.is_superset(&sub), true);</span>
<span class="doccomment">/// ```</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"rust1"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">is_superset</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">other</span>: <span class="kw-2">&</span><span class="ident">BTreeSet</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>) <span class="op">-></span> <span class="ident">bool</span> {
<span class="ident">other</span>.<span class="ident">is_subset</span>(<span class="self">self</span>)
}
<span class="doccomment">/// Adds a value to the set.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// If the set did not have this value present, `true` is returned.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// If the set did have this value present, `false` is returned, and the</span>
<span class="doccomment">/// entry is not updated. See the [module-level documentation] for more.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [module-level documentation]: index.html#insert-and-complex-keys</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use std::collections::BTreeSet;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let mut set = BTreeSet::new();</span>
<span class="doccomment">///</span>
<span class="doccomment">/// assert_eq!(set.insert(2), true);</span>
<span class="doccomment">/// assert_eq!(set.insert(2), false);</span>
<span class="doccomment">/// assert_eq!(set.len(), 1);</span>
<span class="doccomment">/// ```</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"rust1"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">insert</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">value</span>: <span class="ident">T</span>) <span class="op">-></span> <span class="ident">bool</span> {
<span class="self">self</span>.<span class="ident">map</span>.<span class="ident">insert</span>(<span class="ident">value</span>, ()).<span class="ident">is_none</span>()
}
<span class="doccomment">/// Adds a value to the set, replacing the existing value, if any, that is equal to the given</span>
<span class="doccomment">/// one. Returns the replaced value.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use std::collections::BTreeSet;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let mut set = BTreeSet::new();</span>
<span class="doccomment">/// set.insert(Vec::<i32>::new());</span>
<span class="doccomment">///</span>
<span class="doccomment">/// assert_eq!(set.get(&[][..]).unwrap().capacity(), 0);</span>
<span class="doccomment">/// set.replace(Vec::with_capacity(10));</span>
<span class="doccomment">/// assert_eq!(set.get(&[][..]).unwrap().capacity(), 10);</span>
<span class="doccomment">/// ```</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"set_recovery"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.9.0"</span>)]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">replace</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">value</span>: <span class="ident">T</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {
<span class="ident">Recover</span>::<span class="ident">replace</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>.<span class="ident">map</span>, <span class="ident">value</span>)
}
<span class="doccomment">/// Removes a value from the set. Returns `true` if the value was</span>
<span class="doccomment">/// present in the set.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// The value may be any borrowed form of the set's value type,</span>
<span class="doccomment">/// but the ordering on the borrowed form *must* match the</span>
<span class="doccomment">/// ordering on the value type.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use std::collections::BTreeSet;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let mut set = BTreeSet::new();</span>
<span class="doccomment">///</span>
<span class="doccomment">/// set.insert(2);</span>
<span class="doccomment">/// assert_eq!(set.remove(&2), true);</span>
<span class="doccomment">/// assert_eq!(set.remove(&2), false);</span>
<span class="doccomment">/// ```</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"rust1"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">remove</span><span class="op"><</span><span class="ident">Q</span>: <span class="question-mark">?</span><span class="ident">Sized</span><span class="op">></span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">value</span>: <span class="kw-2">&</span><span class="ident">Q</span>) <span class="op">-></span> <span class="ident">bool</span>
<span class="kw">where</span> <span class="ident">T</span>: <span class="ident">Borrow</span><span class="op"><</span><span class="ident">Q</span><span class="op">></span>,
<span class="ident">Q</span>: <span class="ident">Ord</span>
{
<span class="self">self</span>.<span class="ident">map</span>.<span class="ident">remove</span>(<span class="ident">value</span>).<span class="ident">is_some</span>()
}
<span class="doccomment">/// Removes and returns the value in the set, if any, that is equal to the given one.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// The value may be any borrowed form of the set's value type,</span>
<span class="doccomment">/// but the ordering on the borrowed form *must* match the</span>
<span class="doccomment">/// ordering on the value type.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use std::collections::BTreeSet;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let mut set: BTreeSet<_> = [1, 2, 3].iter().cloned().collect();</span>
<span class="doccomment">/// assert_eq!(set.take(&2), Some(2));</span>
<span class="doccomment">/// assert_eq!(set.take(&2), None);</span>
<span class="doccomment">/// ```</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"set_recovery"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.9.0"</span>)]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">take</span><span class="op"><</span><span class="ident">Q</span>: <span class="question-mark">?</span><span class="ident">Sized</span><span class="op">></span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">value</span>: <span class="kw-2">&</span><span class="ident">Q</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>
<span class="kw">where</span> <span class="ident">T</span>: <span class="ident">Borrow</span><span class="op"><</span><span class="ident">Q</span><span class="op">></span>,
<span class="ident">Q</span>: <span class="ident">Ord</span>
{
<span class="ident">Recover</span>::<span class="ident">take</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>.<span class="ident">map</span>, <span class="ident">value</span>)
}
<span class="doccomment">/// Moves all elements from `other` into `Self`, leaving `other` empty.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use std::collections::BTreeSet;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let mut a = BTreeSet::new();</span>
<span class="doccomment">/// a.insert(1);</span>
<span class="doccomment">/// a.insert(2);</span>
<span class="doccomment">/// a.insert(3);</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let mut b = BTreeSet::new();</span>
<span class="doccomment">/// b.insert(3);</span>
<span class="doccomment">/// b.insert(4);</span>
<span class="doccomment">/// b.insert(5);</span>
<span class="doccomment">///</span>
<span class="doccomment">/// a.append(&mut b);</span>
<span class="doccomment">///</span>
<span class="doccomment">/// assert_eq!(a.len(), 5);</span>
<span class="doccomment">/// assert_eq!(b.len(), 0);</span>
<span class="doccomment">///</span>
<span class="doccomment">/// assert!(a.contains(&1));</span>
<span class="doccomment">/// assert!(a.contains(&2));</span>
<span class="doccomment">/// assert!(a.contains(&3));</span>
<span class="doccomment">/// assert!(a.contains(&4));</span>
<span class="doccomment">/// assert!(a.contains(&5));</span>
<span class="doccomment">/// ```</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"btree_append"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.11.0"</span>)]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">append</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">other</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">Self</span>) {
<span class="self">self</span>.<span class="ident">map</span>.<span class="ident">append</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">other</span>.<span class="ident">map</span>);
}
<span class="doccomment">/// Splits the collection into two at the given key. Returns everything after the given key,</span>
<span class="doccomment">/// including the key.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Basic usage:</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use std::collections::BTreeSet;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let mut a = BTreeSet::new();</span>
<span class="doccomment">/// a.insert(1);</span>
<span class="doccomment">/// a.insert(2);</span>
<span class="doccomment">/// a.insert(3);</span>
<span class="doccomment">/// a.insert(17);</span>
<span class="doccomment">/// a.insert(41);</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let b = a.split_off(&3);</span>
<span class="doccomment">///</span>
<span class="doccomment">/// assert_eq!(a.len(), 2);</span>
<span class="doccomment">/// assert_eq!(b.len(), 3);</span>
<span class="doccomment">///</span>
<span class="doccomment">/// assert!(a.contains(&1));</span>
<span class="doccomment">/// assert!(a.contains(&2));</span>
<span class="doccomment">///</span>
<span class="doccomment">/// assert!(b.contains(&3));</span>
<span class="doccomment">/// assert!(b.contains(&17));</span>
<span class="doccomment">/// assert!(b.contains(&41));</span>
<span class="doccomment">/// ```</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"btree_split_off"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.11.0"</span>)]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">split_off</span><span class="op"><</span><span class="ident">Q</span>: <span class="question-mark">?</span><span class="ident">Sized</span> <span class="op">+</span> <span class="ident">Ord</span><span class="op">></span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">key</span>: <span class="kw-2">&</span><span class="ident">Q</span>) <span class="op">-></span> <span class="self">Self</span> <span class="kw">where</span> <span class="ident">T</span>: <span class="ident">Borrow</span><span class="op"><</span><span class="ident">Q</span><span class="op">></span> {
<span class="ident">BTreeSet</span> { <span class="ident">map</span>: <span class="self">self</span>.<span class="ident">map</span>.<span class="ident">split_off</span>(<span class="ident">key</span>) }
}
}
<span class="kw">impl</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="ident">BTreeSet</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {
<span class="doccomment">/// Gets an iterator that visits the values in the `BTreeSet` in ascending order.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use std::collections::BTreeSet;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let set: BTreeSet<usize> = [1, 2, 3].iter().cloned().collect();</span>
<span class="doccomment">/// let mut set_iter = set.iter();</span>
<span class="doccomment">/// assert_eq!(set_iter.next(), Some(&1));</span>
<span class="doccomment">/// assert_eq!(set_iter.next(), Some(&2));</span>
<span class="doccomment">/// assert_eq!(set_iter.next(), Some(&3));</span>
<span class="doccomment">/// assert_eq!(set_iter.next(), None);</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Values returned by the iterator are returned in ascending order:</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use std::collections::BTreeSet;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let set: BTreeSet<usize> = [3, 1, 2].iter().cloned().collect();</span>
<span class="doccomment">/// let mut set_iter = set.iter();</span>
<span class="doccomment">/// assert_eq!(set_iter.next(), Some(&1));</span>
<span class="doccomment">/// assert_eq!(set_iter.next(), Some(&2));</span>
<span class="doccomment">/// assert_eq!(set_iter.next(), Some(&3));</span>
<span class="doccomment">/// assert_eq!(set_iter.next(), None);</span>
<span class="doccomment">/// ```</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"rust1"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">iter</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">Iter</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {
<span class="ident">Iter</span> { <span class="ident">iter</span>: <span class="self">self</span>.<span class="ident">map</span>.<span class="ident">keys</span>() }
}
<span class="doccomment">/// Returns the number of elements in the set.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use std::collections::BTreeSet;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let mut v = BTreeSet::new();</span>
<span class="doccomment">/// assert_eq!(v.len(), 0);</span>
<span class="doccomment">/// v.insert(1);</span>
<span class="doccomment">/// assert_eq!(v.len(), 1);</span>
<span class="doccomment">/// ```</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"rust1"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">len</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">usize</span> {
<span class="self">self</span>.<span class="ident">map</span>.<span class="ident">len</span>()
}
<span class="doccomment">/// Returns `true` if the set contains no elements.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use std::collections::BTreeSet;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let mut v = BTreeSet::new();</span>
<span class="doccomment">/// assert!(v.is_empty());</span>
<span class="doccomment">/// v.insert(1);</span>
<span class="doccomment">/// assert!(!v.is_empty());</span>
<span class="doccomment">/// ```</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"rust1"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">is_empty</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> {
<span class="self">self</span>.<span class="ident">len</span>() <span class="op">==</span> <span class="number">0</span>
}
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"rust1"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">impl</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">Ord</span><span class="op">></span> <span class="ident">FromIterator</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="kw">for</span> <span class="ident">BTreeSet</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {
<span class="kw">fn</span> <span class="ident">from_iter</span><span class="op"><</span><span class="ident">I</span>: <span class="ident">IntoIterator</span><span class="op"><</span><span class="ident">Item</span> <span class="op">=</span> <span class="ident">T</span><span class="op">>></span>(<span class="ident">iter</span>: <span class="ident">I</span>) <span class="op">-></span> <span class="ident">BTreeSet</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">set</span> <span class="op">=</span> <span class="ident">BTreeSet</span>::<span class="ident">new</span>();
<span class="ident">set</span>.<span class="ident">extend</span>(<span class="ident">iter</span>);
<span class="ident">set</span>
}
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"rust1"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">impl</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="ident">IntoIterator</span> <span class="kw">for</span> <span class="ident">BTreeSet</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {
<span class="kw">type</span> <span class="ident">Item</span> <span class="op">=</span> <span class="ident">T</span>;
<span class="kw">type</span> <span class="ident">IntoIter</span> <span class="op">=</span> <span class="ident">IntoIter</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>;
<span class="doccomment">/// Gets an iterator for moving out the `BTreeSet`'s contents.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use std::collections::BTreeSet;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let set: BTreeSet<usize> = [1, 2, 3, 4].iter().cloned().collect();</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let v: Vec<_> = set.into_iter().collect();</span>
<span class="doccomment">/// assert_eq!(v, [1, 2, 3, 4]);</span>
<span class="doccomment">/// ```</span>
<span class="kw">fn</span> <span class="ident">into_iter</span>(<span class="self">self</span>) <span class="op">-></span> <span class="ident">IntoIter</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {
<span class="ident">IntoIter</span> { <span class="ident">iter</span>: <span class="self">self</span>.<span class="ident">map</span>.<span class="ident">into_iter</span>() }
}
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"rust1"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> <span class="ident">IntoIterator</span> <span class="kw">for</span> <span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">BTreeSet</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {
<span class="kw">type</span> <span class="ident">Item</span> <span class="op">=</span> <span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">T</span>;
<span class="kw">type</span> <span class="ident">IntoIter</span> <span class="op">=</span> <span class="ident">Iter</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span>;
<span class="kw">fn</span> <span class="ident">into_iter</span>(<span class="self">self</span>) <span class="op">-></span> <span class="ident">Iter</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> {
<span class="self">self</span>.<span class="ident">iter</span>()
}
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"rust1"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">impl</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">Ord</span><span class="op">></span> <span class="ident">Extend</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="kw">for</span> <span class="ident">BTreeSet</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">extend</span><span class="op"><</span><span class="ident">Iter</span>: <span class="ident">IntoIterator</span><span class="op"><</span><span class="ident">Item</span> <span class="op">=</span> <span class="ident">T</span><span class="op">>></span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">iter</span>: <span class="ident">Iter</span>) {
<span class="kw">for</span> <span class="ident">elem</span> <span class="kw">in</span> <span class="ident">iter</span> {
<span class="self">self</span>.<span class="ident">insert</span>(<span class="ident">elem</span>);
}
}
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"extend_ref"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.2.0"</span>)]</span>
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span>: <span class="lifetime">'a</span> <span class="op">+</span> <span class="ident">Ord</span> <span class="op">+</span> <span class="ident">Copy</span><span class="op">></span> <span class="ident">Extend</span><span class="op"><</span><span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">T</span><span class="op">></span> <span class="kw">for</span> <span class="ident">BTreeSet</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {
<span class="kw">fn</span> <span class="ident">extend</span><span class="op"><</span><span class="ident">I</span>: <span class="ident">IntoIterator</span><span class="op"><</span><span class="ident">Item</span> <span class="op">=</span> <span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">T</span><span class="op">>></span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">iter</span>: <span class="ident">I</span>) {
<span class="self">self</span>.<span class="ident">extend</span>(<span class="ident">iter</span>.<span class="ident">into_iter</span>().<span class="ident">cloned</span>());
}
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"rust1"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">impl</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">Ord</span><span class="op">></span> <span class="ident">Default</span> <span class="kw">for</span> <span class="ident">BTreeSet</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {
<span class="doccomment">/// Makes an empty `BTreeSet<T>` with a reasonable choice of B.</span>
<span class="kw">fn</span> <span class="ident">default</span>() <span class="op">-></span> <span class="ident">BTreeSet</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {
<span class="ident">BTreeSet</span>::<span class="ident">new</span>()
}
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"rust1"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="lifetime">'b</span>, <span class="ident">T</span>: <span class="ident">Ord</span> <span class="op">+</span> <span class="ident">Clone</span><span class="op">></span> <span class="ident">Sub</span><span class="op"><</span><span class="kw-2">&</span><span class="lifetime">'b</span> <span class="ident">BTreeSet</span><span class="op"><</span><span class="ident">T</span><span class="op">>></span> <span class="kw">for</span> <span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">BTreeSet</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {
<span class="kw">type</span> <span class="ident">Output</span> <span class="op">=</span> <span class="ident">BTreeSet</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>;
<span class="doccomment">/// Returns the difference of `self` and `rhs` as a new `BTreeSet<T>`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use std::collections::BTreeSet;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let a: BTreeSet<_> = vec![1, 2, 3].into_iter().collect();</span>
<span class="doccomment">/// let b: BTreeSet<_> = vec![3, 4, 5].into_iter().collect();</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let result = &a - &b;</span>
<span class="doccomment">/// let result_vec: Vec<_> = result.into_iter().collect();</span>
<span class="doccomment">/// assert_eq!(result_vec, [1, 2]);</span>
<span class="doccomment">/// ```</span>
<span class="kw">fn</span> <span class="ident">sub</span>(<span class="self">self</span>, <span class="ident">rhs</span>: <span class="kw-2">&</span><span class="ident">BTreeSet</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>) <span class="op">-></span> <span class="ident">BTreeSet</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {
<span class="self">self</span>.<span class="ident">difference</span>(<span class="ident">rhs</span>).<span class="ident">cloned</span>().<span class="ident">collect</span>()
}
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"rust1"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="lifetime">'b</span>, <span class="ident">T</span>: <span class="ident">Ord</span> <span class="op">+</span> <span class="ident">Clone</span><span class="op">></span> <span class="ident">BitXor</span><span class="op"><</span><span class="kw-2">&</span><span class="lifetime">'b</span> <span class="ident">BTreeSet</span><span class="op"><</span><span class="ident">T</span><span class="op">>></span> <span class="kw">for</span> <span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">BTreeSet</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {
<span class="kw">type</span> <span class="ident">Output</span> <span class="op">=</span> <span class="ident">BTreeSet</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>;
<span class="doccomment">/// Returns the symmetric difference of `self` and `rhs` as a new `BTreeSet<T>`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use std::collections::BTreeSet;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let a: BTreeSet<_> = vec![1, 2, 3].into_iter().collect();</span>
<span class="doccomment">/// let b: BTreeSet<_> = vec![2, 3, 4].into_iter().collect();</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let result = &a ^ &b;</span>
<span class="doccomment">/// let result_vec: Vec<_> = result.into_iter().collect();</span>
<span class="doccomment">/// assert_eq!(result_vec, [1, 4]);</span>
<span class="doccomment">/// ```</span>
<span class="kw">fn</span> <span class="ident">bitxor</span>(<span class="self">self</span>, <span class="ident">rhs</span>: <span class="kw-2">&</span><span class="ident">BTreeSet</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>) <span class="op">-></span> <span class="ident">BTreeSet</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {
<span class="self">self</span>.<span class="ident">symmetric_difference</span>(<span class="ident">rhs</span>).<span class="ident">cloned</span>().<span class="ident">collect</span>()
}
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"rust1"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="lifetime">'b</span>, <span class="ident">T</span>: <span class="ident">Ord</span> <span class="op">+</span> <span class="ident">Clone</span><span class="op">></span> <span class="ident">BitAnd</span><span class="op"><</span><span class="kw-2">&</span><span class="lifetime">'b</span> <span class="ident">BTreeSet</span><span class="op"><</span><span class="ident">T</span><span class="op">>></span> <span class="kw">for</span> <span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">BTreeSet</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {
<span class="kw">type</span> <span class="ident">Output</span> <span class="op">=</span> <span class="ident">BTreeSet</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>;
<span class="doccomment">/// Returns the intersection of `self` and `rhs` as a new `BTreeSet<T>`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use std::collections::BTreeSet;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let a: BTreeSet<_> = vec![1, 2, 3].into_iter().collect();</span>
<span class="doccomment">/// let b: BTreeSet<_> = vec![2, 3, 4].into_iter().collect();</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let result = &a & &b;</span>
<span class="doccomment">/// let result_vec: Vec<_> = result.into_iter().collect();</span>
<span class="doccomment">/// assert_eq!(result_vec, [2, 3]);</span>
<span class="doccomment">/// ```</span>
<span class="kw">fn</span> <span class="ident">bitand</span>(<span class="self">self</span>, <span class="ident">rhs</span>: <span class="kw-2">&</span><span class="ident">BTreeSet</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>) <span class="op">-></span> <span class="ident">BTreeSet</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {
<span class="self">self</span>.<span class="ident">intersection</span>(<span class="ident">rhs</span>).<span class="ident">cloned</span>().<span class="ident">collect</span>()
}
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"rust1"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="lifetime">'b</span>, <span class="ident">T</span>: <span class="ident">Ord</span> <span class="op">+</span> <span class="ident">Clone</span><span class="op">></span> <span class="ident">BitOr</span><span class="op"><</span><span class="kw-2">&</span><span class="lifetime">'b</span> <span class="ident">BTreeSet</span><span class="op"><</span><span class="ident">T</span><span class="op">>></span> <span class="kw">for</span> <span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">BTreeSet</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {
<span class="kw">type</span> <span class="ident">Output</span> <span class="op">=</span> <span class="ident">BTreeSet</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>;
<span class="doccomment">/// Returns the union of `self` and `rhs` as a new `BTreeSet<T>`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use std::collections::BTreeSet;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let a: BTreeSet<_> = vec![1, 2, 3].into_iter().collect();</span>
<span class="doccomment">/// let b: BTreeSet<_> = vec![3, 4, 5].into_iter().collect();</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let result = &a | &b;</span>
<span class="doccomment">/// let result_vec: Vec<_> = result.into_iter().collect();</span>
<span class="doccomment">/// assert_eq!(result_vec, [1, 2, 3, 4, 5]);</span>
<span class="doccomment">/// ```</span>
<span class="kw">fn</span> <span class="ident">bitor</span>(<span class="self">self</span>, <span class="ident">rhs</span>: <span class="kw-2">&</span><span class="ident">BTreeSet</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>) <span class="op">-></span> <span class="ident">BTreeSet</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {
<span class="self">self</span>.<span class="ident">union</span>(<span class="ident">rhs</span>).<span class="ident">cloned</span>().<span class="ident">collect</span>()
}
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"rust1"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">impl</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">Debug</span><span class="op">></span> <span class="ident">Debug</span> <span class="kw">for</span> <span class="ident">BTreeSet</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {
<span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-></span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> {
<span class="ident">f</span>.<span class="ident">debug_set</span>().<span class="ident">entries</span>(<span class="self">self</span>.<span class="ident">iter</span>()).<span class="ident">finish</span>()
}
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"rust1"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> <span class="ident">Clone</span> <span class="kw">for</span> <span class="ident">Iter</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> {
<span class="kw">fn</span> <span class="ident">clone</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">Iter</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> {
<span class="ident">Iter</span> { <span class="ident">iter</span>: <span class="self">self</span>.<span class="ident">iter</span>.<span class="ident">clone</span>() }
}
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"rust1"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> <span class="ident">Iterator</span> <span class="kw">for</span> <span class="ident">Iter</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> {
<span class="kw">type</span> <span class="ident">Item</span> <span class="op">=</span> <span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">T</span>;
<span class="kw">fn</span> <span class="ident">next</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">T</span><span class="op">></span> {
<span class="self">self</span>.<span class="ident">iter</span>.<span class="ident">next</span>()
}
<span class="kw">fn</span> <span class="ident">size_hint</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> (<span class="ident">usize</span>, <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">usize</span><span class="op">></span>) {
<span class="self">self</span>.<span class="ident">iter</span>.<span class="ident">size_hint</span>()
}
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"rust1"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> <span class="ident">DoubleEndedIterator</span> <span class="kw">for</span> <span class="ident">Iter</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> {
<span class="kw">fn</span> <span class="ident">next_back</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">T</span><span class="op">></span> {
<span class="self">self</span>.<span class="ident">iter</span>.<span class="ident">next_back</span>()
}
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"rust1"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> <span class="ident">ExactSizeIterator</span> <span class="kw">for</span> <span class="ident">Iter</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> {
<span class="kw">fn</span> <span class="ident">len</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">usize</span> { <span class="self">self</span>.<span class="ident">iter</span>.<span class="ident">len</span>() }
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"fused"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.26.0"</span>)]</span>
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> <span class="ident">FusedIterator</span> <span class="kw">for</span> <span class="ident">Iter</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> {}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"rust1"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">impl</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="ident">Iterator</span> <span class="kw">for</span> <span class="ident">IntoIter</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {
<span class="kw">type</span> <span class="ident">Item</span> <span class="op">=</span> <span class="ident">T</span>;
<span class="kw">fn</span> <span class="ident">next</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {
<span class="self">self</span>.<span class="ident">iter</span>.<span class="ident">next</span>().<span class="ident">map</span>(<span class="op">|</span>(<span class="ident">k</span>, <span class="kw">_</span>)<span class="op">|</span> <span class="ident">k</span>)
}
<span class="kw">fn</span> <span class="ident">size_hint</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> (<span class="ident">usize</span>, <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">usize</span><span class="op">></span>) {
<span class="self">self</span>.<span class="ident">iter</span>.<span class="ident">size_hint</span>()
}
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"rust1"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">impl</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="ident">DoubleEndedIterator</span> <span class="kw">for</span> <span class="ident">IntoIter</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {
<span class="kw">fn</span> <span class="ident">next_back</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {
<span class="self">self</span>.<span class="ident">iter</span>.<span class="ident">next_back</span>().<span class="ident">map</span>(<span class="op">|</span>(<span class="ident">k</span>, <span class="kw">_</span>)<span class="op">|</span> <span class="ident">k</span>)
}
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"rust1"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">impl</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="ident">ExactSizeIterator</span> <span class="kw">for</span> <span class="ident">IntoIter</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {
<span class="kw">fn</span> <span class="ident">len</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">usize</span> { <span class="self">self</span>.<span class="ident">iter</span>.<span class="ident">len</span>() }
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"fused"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.26.0"</span>)]</span>
<span class="kw">impl</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="ident">FusedIterator</span> <span class="kw">for</span> <span class="ident">IntoIter</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"btree_range"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.17.0"</span>)]</span>
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> <span class="ident">Clone</span> <span class="kw">for</span> <span class="ident">Range</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> {
<span class="kw">fn</span> <span class="ident">clone</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">Range</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> {
<span class="ident">Range</span> { <span class="ident">iter</span>: <span class="self">self</span>.<span class="ident">iter</span>.<span class="ident">clone</span>() }
}
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"btree_range"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.17.0"</span>)]</span>
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> <span class="ident">Iterator</span> <span class="kw">for</span> <span class="ident">Range</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> {
<span class="kw">type</span> <span class="ident">Item</span> <span class="op">=</span> <span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">T</span>;
<span class="kw">fn</span> <span class="ident">next</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">T</span><span class="op">></span> {
<span class="self">self</span>.<span class="ident">iter</span>.<span class="ident">next</span>().<span class="ident">map</span>(<span class="op">|</span>(<span class="ident">k</span>, <span class="kw">_</span>)<span class="op">|</span> <span class="ident">k</span>)
}
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"btree_range"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.17.0"</span>)]</span>
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> <span class="ident">DoubleEndedIterator</span> <span class="kw">for</span> <span class="ident">Range</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> {
<span class="kw">fn</span> <span class="ident">next_back</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">T</span><span class="op">></span> {
<span class="self">self</span>.<span class="ident">iter</span>.<span class="ident">next_back</span>().<span class="ident">map</span>(<span class="op">|</span>(<span class="ident">k</span>, <span class="kw">_</span>)<span class="op">|</span> <span class="ident">k</span>)
}
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"fused"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.26.0"</span>)]</span>
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> <span class="ident">FusedIterator</span> <span class="kw">for</span> <span class="ident">Range</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> {}
<span class="doccomment">/// Compare `x` and `y`, but return `short` if x is None and `long` if y is None</span>
<span class="kw">fn</span> <span class="ident">cmp_opt</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">Ord</span><span class="op">></span>(<span class="ident">x</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">T</span><span class="op">></span>, <span class="ident">y</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">T</span><span class="op">></span>, <span class="ident">short</span>: <span class="ident">Ordering</span>, <span class="ident">long</span>: <span class="ident">Ordering</span>) <span class="op">-></span> <span class="ident">Ordering</span> {
<span class="kw">match</span> (<span class="ident">x</span>, <span class="ident">y</span>) {
(<span class="prelude-val">None</span>, <span class="kw">_</span>) <span class="op">=></span> <span class="ident">short</span>,
(<span class="kw">_</span>, <span class="prelude-val">None</span>) <span class="op">=></span> <span class="ident">long</span>,
(<span class="prelude-val">Some</span>(<span class="ident">x1</span>), <span class="prelude-val">Some</span>(<span class="ident">y1</span>)) <span class="op">=></span> <span class="ident">x1</span>.<span class="ident">cmp</span>(<span class="ident">y1</span>),
}
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"rust1"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> <span class="ident">Clone</span> <span class="kw">for</span> <span class="ident">Difference</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> {
<span class="kw">fn</span> <span class="ident">clone</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">Difference</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> {
<span class="ident">Difference</span> {
<span class="ident">a</span>: <span class="self">self</span>.<span class="ident">a</span>.<span class="ident">clone</span>(),
<span class="ident">b</span>: <span class="self">self</span>.<span class="ident">b</span>.<span class="ident">clone</span>(),
}
}
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"rust1"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span>: <span class="ident">Ord</span><span class="op">></span> <span class="ident">Iterator</span> <span class="kw">for</span> <span class="ident">Difference</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> {
<span class="kw">type</span> <span class="ident">Item</span> <span class="op">=</span> <span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">T</span>;
<span class="kw">fn</span> <span class="ident">next</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">T</span><span class="op">></span> {
<span class="kw">loop</span> {
<span class="kw">match</span> <span class="ident">cmp_opt</span>(<span class="self">self</span>.<span class="ident">a</span>.<span class="ident">peek</span>(), <span class="self">self</span>.<span class="ident">b</span>.<span class="ident">peek</span>(), <span class="ident">Less</span>, <span class="ident">Less</span>) {
<span class="ident">Less</span> <span class="op">=></span> <span class="kw">return</span> <span class="self">self</span>.<span class="ident">a</span>.<span class="ident">next</span>(),
<span class="ident">Equal</span> <span class="op">=></span> {
<span class="self">self</span>.<span class="ident">a</span>.<span class="ident">next</span>();
<span class="self">self</span>.<span class="ident">b</span>.<span class="ident">next</span>();
}
<span class="ident">Greater</span> <span class="op">=></span> {
<span class="self">self</span>.<span class="ident">b</span>.<span class="ident">next</span>();
}
}
}
}
<span class="kw">fn</span> <span class="ident">size_hint</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> (<span class="ident">usize</span>, <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">usize</span><span class="op">></span>) {
<span class="kw">let</span> <span class="ident">a_len</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">a</span>.<span class="ident">len</span>();
<span class="kw">let</span> <span class="ident">b_len</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">b</span>.<span class="ident">len</span>();
(<span class="ident">a_len</span>.<span class="ident">saturating_sub</span>(<span class="ident">b_len</span>), <span class="prelude-val">Some</span>(<span class="ident">a_len</span>))
}
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"fused"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.26.0"</span>)]</span>
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span>: <span class="ident">Ord</span><span class="op">></span> <span class="ident">FusedIterator</span> <span class="kw">for</span> <span class="ident">Difference</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> {}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"rust1"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> <span class="ident">Clone</span> <span class="kw">for</span> <span class="ident">SymmetricDifference</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> {
<span class="kw">fn</span> <span class="ident">clone</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">SymmetricDifference</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> {
<span class="ident">SymmetricDifference</span> {
<span class="ident">a</span>: <span class="self">self</span>.<span class="ident">a</span>.<span class="ident">clone</span>(),
<span class="ident">b</span>: <span class="self">self</span>.<span class="ident">b</span>.<span class="ident">clone</span>(),
}
}
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"rust1"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span>: <span class="ident">Ord</span><span class="op">></span> <span class="ident">Iterator</span> <span class="kw">for</span> <span class="ident">SymmetricDifference</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> {
<span class="kw">type</span> <span class="ident">Item</span> <span class="op">=</span> <span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">T</span>;
<span class="kw">fn</span> <span class="ident">next</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">T</span><span class="op">></span> {
<span class="kw">loop</span> {
<span class="kw">match</span> <span class="ident">cmp_opt</span>(<span class="self">self</span>.<span class="ident">a</span>.<span class="ident">peek</span>(), <span class="self">self</span>.<span class="ident">b</span>.<span class="ident">peek</span>(), <span class="ident">Greater</span>, <span class="ident">Less</span>) {
<span class="ident">Less</span> <span class="op">=></span> <span class="kw">return</span> <span class="self">self</span>.<span class="ident">a</span>.<span class="ident">next</span>(),
<span class="ident">Equal</span> <span class="op">=></span> {
<span class="self">self</span>.<span class="ident">a</span>.<span class="ident">next</span>();
<span class="self">self</span>.<span class="ident">b</span>.<span class="ident">next</span>();
}
<span class="ident">Greater</span> <span class="op">=></span> <span class="kw">return</span> <span class="self">self</span>.<span class="ident">b</span>.<span class="ident">next</span>(),
}
}
}
<span class="kw">fn</span> <span class="ident">size_hint</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> (<span class="ident">usize</span>, <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">usize</span><span class="op">></span>) {
(<span class="number">0</span>, <span class="prelude-val">Some</span>(<span class="self">self</span>.<span class="ident">a</span>.<span class="ident">len</span>() <span class="op">+</span> <span class="self">self</span>.<span class="ident">b</span>.<span class="ident">len</span>()))
}
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"fused"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.26.0"</span>)]</span>
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span>: <span class="ident">Ord</span><span class="op">></span> <span class="ident">FusedIterator</span> <span class="kw">for</span> <span class="ident">SymmetricDifference</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> {}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"rust1"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> <span class="ident">Clone</span> <span class="kw">for</span> <span class="ident">Intersection</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> {
<span class="kw">fn</span> <span class="ident">clone</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">Intersection</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> {
<span class="ident">Intersection</span> {
<span class="ident">a</span>: <span class="self">self</span>.<span class="ident">a</span>.<span class="ident">clone</span>(),
<span class="ident">b</span>: <span class="self">self</span>.<span class="ident">b</span>.<span class="ident">clone</span>(),
}
}
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"rust1"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span>: <span class="ident">Ord</span><span class="op">></span> <span class="ident">Iterator</span> <span class="kw">for</span> <span class="ident">Intersection</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> {
<span class="kw">type</span> <span class="ident">Item</span> <span class="op">=</span> <span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">T</span>;
<span class="kw">fn</span> <span class="ident">next</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">T</span><span class="op">></span> {
<span class="kw">loop</span> {
<span class="kw">match</span> <span class="ident">Ord</span>::<span class="ident">cmp</span>(<span class="self">self</span>.<span class="ident">a</span>.<span class="ident">peek</span>()<span class="question-mark">?</span>, <span class="self">self</span>.<span class="ident">b</span>.<span class="ident">peek</span>()<span class="question-mark">?</span>) {
<span class="ident">Less</span> <span class="op">=></span> {
<span class="self">self</span>.<span class="ident">a</span>.<span class="ident">next</span>();
}
<span class="ident">Equal</span> <span class="op">=></span> {
<span class="self">self</span>.<span class="ident">b</span>.<span class="ident">next</span>();
<span class="kw">return</span> <span class="self">self</span>.<span class="ident">a</span>.<span class="ident">next</span>();
}
<span class="ident">Greater</span> <span class="op">=></span> {
<span class="self">self</span>.<span class="ident">b</span>.<span class="ident">next</span>();
}
}
}
}
<span class="kw">fn</span> <span class="ident">size_hint</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> (<span class="ident">usize</span>, <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">usize</span><span class="op">></span>) {
(<span class="number">0</span>, <span class="prelude-val">Some</span>(<span class="ident">min</span>(<span class="self">self</span>.<span class="ident">a</span>.<span class="ident">len</span>(), <span class="self">self</span>.<span class="ident">b</span>.<span class="ident">len</span>())))
}
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"fused"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.26.0"</span>)]</span>
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span>: <span class="ident">Ord</span><span class="op">></span> <span class="ident">FusedIterator</span> <span class="kw">for</span> <span class="ident">Intersection</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> {}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"rust1"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> <span class="ident">Clone</span> <span class="kw">for</span> <span class="ident">Union</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> {
<span class="kw">fn</span> <span class="ident">clone</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">Union</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> {
<span class="ident">Union</span> {
<span class="ident">a</span>: <span class="self">self</span>.<span class="ident">a</span>.<span class="ident">clone</span>(),
<span class="ident">b</span>: <span class="self">self</span>.<span class="ident">b</span>.<span class="ident">clone</span>(),
}
}
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"rust1"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span>: <span class="ident">Ord</span><span class="op">></span> <span class="ident">Iterator</span> <span class="kw">for</span> <span class="ident">Union</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> {
<span class="kw">type</span> <span class="ident">Item</span> <span class="op">=</span> <span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">T</span>;
<span class="kw">fn</span> <span class="ident">next</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">T</span><span class="op">></span> {
<span class="kw">match</span> <span class="ident">cmp_opt</span>(<span class="self">self</span>.<span class="ident">a</span>.<span class="ident">peek</span>(), <span class="self">self</span>.<span class="ident">b</span>.<span class="ident">peek</span>(), <span class="ident">Greater</span>, <span class="ident">Less</span>) {
<span class="ident">Less</span> <span class="op">=></span> <span class="self">self</span>.<span class="ident">a</span>.<span class="ident">next</span>(),
<span class="ident">Equal</span> <span class="op">=></span> {
<span class="self">self</span>.<span class="ident">b</span>.<span class="ident">next</span>();
<span class="self">self</span>.<span class="ident">a</span>.<span class="ident">next</span>()
}
<span class="ident">Greater</span> <span class="op">=></span> <span class="self">self</span>.<span class="ident">b</span>.<span class="ident">next</span>(),
}
}
<span class="kw">fn</span> <span class="ident">size_hint</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> (<span class="ident">usize</span>, <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">usize</span><span class="op">></span>) {
<span class="kw">let</span> <span class="ident">a_len</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">a</span>.<span class="ident">len</span>();
<span class="kw">let</span> <span class="ident">b_len</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">b</span>.<span class="ident">len</span>();
(<span class="ident">max</span>(<span class="ident">a_len</span>, <span class="ident">b_len</span>), <span class="prelude-val">Some</span>(<span class="ident">a_len</span> <span class="op">+</span> <span class="ident">b_len</span>))
}
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"fused"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.26.0"</span>)]</span>
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span>: <span class="ident">Ord</span><span class="op">></span> <span class="ident">FusedIterator</span> <span class="kw">for</span> <span class="ident">Union</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> {}
</pre>
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distrib
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Mageia
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6
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armv7hl
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core-updates
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4e2dbb669434a7691662cb2f0ad38972
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