<!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 `libcore/ops/range.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>range.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='../../../core/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 2012 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="kw">use</span> <span class="ident">fmt</span>;
<span class="doccomment">/// An unbounded range (`..`).</span>
<span class="doccomment">///</span>
<span class="doccomment">/// `RangeFull` is primarily used as a [slicing index], its shorthand is `..`.</span>
<span class="doccomment">/// It cannot serve as an [`Iterator`] because it doesn't have a starting point.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// The `..` syntax is a `RangeFull`:</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// assert_eq!((..), std::ops::RangeFull);</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">///</span>
<span class="doccomment">/// It does not have an [`IntoIterator`] implementation, so you can't use it in</span>
<span class="doccomment">/// a `for` loop directly. This won't compile:</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```compile_fail,E0277</span>
<span class="doccomment">/// for i in .. {</span>
<span class="doccomment">/// // ...</span>
<span class="doccomment">/// }</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Used as a [slicing index], `RangeFull` produces the full array as a slice.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// let arr = [0, 1, 2, 3];</span>
<span class="doccomment">/// assert_eq!(arr[ .. ], [0,1,2,3]); // RangeFull</span>
<span class="doccomment">/// assert_eq!(arr[ ..3], [0,1,2 ]);</span>
<span class="doccomment">/// assert_eq!(arr[1.. ], [ 1,2,3]);</span>
<span class="doccomment">/// assert_eq!(arr[1..3], [ 1,2 ]);</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [`IntoIterator`]: ../iter/trait.Iterator.html</span>
<span class="doccomment">/// [`Iterator`]: ../iter/trait.IntoIterator.html</span>
<span class="doccomment">/// [slicing index]: ../slice/trait.SliceIndex.html</span>
<span class="attribute">#[<span class="ident">doc</span>(<span class="ident">alias</span> <span class="op">=</span> <span class="string">".."</span>)]</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Copy</span>, <span class="ident">Clone</span>, <span class="ident">PartialEq</span>, <span class="ident">Eq</span>, <span class="ident">Hash</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">RangeFull</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="ident">fmt</span>::<span class="ident">Debug</span> <span class="kw">for</span> <span class="ident">RangeFull</span> {
<span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">fmt</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="macro">write</span><span class="macro">!</span>(<span class="ident">fmt</span>, <span class="string">".."</span>)
}
}
<span class="doccomment">/// A (half-open) range bounded inclusively below and exclusively above</span>
<span class="doccomment">/// (`start..end`).</span>
<span class="doccomment">///</span>
<span class="doccomment">/// The `Range` `start..end` contains all values with `x >= start` and</span>
<span class="doccomment">/// `x < end`. It is empty unless `start < end`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// assert_eq!((3..5), std::ops::Range { start: 3, end: 5 });</span>
<span class="doccomment">/// assert_eq!(3 + 4 + 5, (3..6).sum());</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let arr = ['a', 'b', 'c', 'd'];</span>
<span class="doccomment">/// assert_eq!(arr[ .. ], ['a', 'b', 'c', 'd']);</span>
<span class="doccomment">/// assert_eq!(arr[ ..3], ['a', 'b', 'c', ]);</span>
<span class="doccomment">/// assert_eq!(arr[1.. ], [ 'b', 'c', 'd']);</span>
<span class="doccomment">/// assert_eq!(arr[1..3], [ 'b', 'c' ]); // Range</span>
<span class="doccomment">/// ```</span>
<span class="attribute">#[<span class="ident">doc</span>(<span class="ident">alias</span> <span class="op">=</span> <span class="string">".."</span>)]</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>, <span class="ident">PartialEq</span>, <span class="ident">Eq</span>, <span class="ident">Hash</span>)]</span> <span class="comment">// not Copy -- see #27186</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">Range</span><span class="op"><</span><span class="ident">Idx</span><span class="op">></span> {
<span class="doccomment">/// The lower bound of the range (inclusive).</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="ident">start</span>: <span class="ident">Idx</span>,
<span class="doccomment">/// The upper bound of the range (exclusive).</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="ident">end</span>: <span class="ident">Idx</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">Idx</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">Range</span><span class="op"><</span><span class="ident">Idx</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">fmt</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="macro">write</span><span class="macro">!</span>(<span class="ident">fmt</span>, <span class="string">"{:?}..{:?}"</span>, <span class="self">self</span>.<span class="ident">start</span>, <span class="self">self</span>.<span class="ident">end</span>)
}
}
<span class="kw">impl</span><span class="op"><</span><span class="ident">Idx</span>: <span class="ident">PartialOrd</span><span class="op"><</span><span class="ident">Idx</span><span class="op">>></span> <span class="ident">Range</span><span class="op"><</span><span class="ident">Idx</span><span class="op">></span> {
<span class="doccomment">/// Returns `true` if `item` is contained in the range.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// #![feature(range_contains)]</span>
<span class="doccomment">///</span>
<span class="doccomment">/// use std::f32;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// assert!(!(3..5).contains(&2));</span>
<span class="doccomment">/// assert!( (3..5).contains(&3));</span>
<span class="doccomment">/// assert!( (3..5).contains(&4));</span>
<span class="doccomment">/// assert!(!(3..5).contains(&5));</span>
<span class="doccomment">///</span>
<span class="doccomment">/// assert!(!(3..3).contains(&3));</span>
<span class="doccomment">/// assert!(!(3..2).contains(&3));</span>
<span class="doccomment">///</span>
<span class="doccomment">/// assert!( (0.0..1.0).contains(&0.5));</span>
<span class="doccomment">/// assert!(!(0.0..1.0).contains(&f32::NAN));</span>
<span class="doccomment">/// assert!(!(0.0..f32::NAN).contains(&0.5));</span>
<span class="doccomment">/// assert!(!(f32::NAN..1.0).contains(&0.5));</span>
<span class="doccomment">/// ```</span>
<span class="attribute">#[<span class="ident">unstable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"range_contains"</span>, <span class="ident">reason</span> <span class="op">=</span> <span class="string">"recently added as per RFC"</span>, <span class="ident">issue</span> <span class="op">=</span> <span class="string">"32311"</span>)]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">contains</span><span class="op"><</span><span class="ident">U</span><span class="op">></span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">item</span>: <span class="kw-2">&</span><span class="ident">U</span>) <span class="op">-></span> <span class="ident">bool</span>
<span class="kw">where</span>
<span class="ident">Idx</span>: <span class="ident">PartialOrd</span><span class="op"><</span><span class="ident">U</span><span class="op">></span>,
<span class="ident">U</span>: <span class="question-mark">?</span><span class="ident">Sized</span> <span class="op">+</span> <span class="ident">PartialOrd</span><span class="op"><</span><span class="ident">Idx</span><span class="op">></span>,
{
<span class="op"><</span><span class="self">Self</span> <span class="kw">as</span> <span class="ident">RangeBounds</span><span class="op"><</span><span class="ident">Idx</span><span class="op">>></span>::<span class="ident">contains</span>(<span class="self">self</span>, <span class="ident">item</span>)
}
<span class="doccomment">/// Returns `true` if the range contains no items.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// #![feature(range_is_empty)]</span>
<span class="doccomment">///</span>
<span class="doccomment">/// assert!(!(3..5).is_empty());</span>
<span class="doccomment">/// assert!( (3..3).is_empty());</span>
<span class="doccomment">/// assert!( (3..2).is_empty());</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">///</span>
<span class="doccomment">/// The range is empty if either side is incomparable:</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// #![feature(range_is_empty)]</span>
<span class="doccomment">///</span>
<span class="doccomment">/// use std::f32::NAN;</span>
<span class="doccomment">/// assert!(!(3.0..5.0).is_empty());</span>
<span class="doccomment">/// assert!( (3.0..NAN).is_empty());</span>
<span class="doccomment">/// assert!( (NAN..5.0).is_empty());</span>
<span class="doccomment">/// ```</span>
<span class="attribute">#[<span class="ident">unstable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"range_is_empty"</span>, <span class="ident">reason</span> <span class="op">=</span> <span class="string">"recently added"</span>, <span class="ident">issue</span> <span class="op">=</span> <span class="string">"48111"</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="op">!</span>(<span class="self">self</span>.<span class="ident">start</span> <span class="op"><</span> <span class="self">self</span>.<span class="ident">end</span>)
}
}
<span class="doccomment">/// A range only bounded inclusively below (`start..`).</span>
<span class="doccomment">///</span>
<span class="doccomment">/// The `RangeFrom` `start..` contains all values with `x >= start`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// *Note*: Currently, no overflow checking is done for the [`Iterator`]</span>
<span class="doccomment">/// implementation; if you use an integer range and the integer overflows, it</span>
<span class="doccomment">/// might panic in debug mode or create an endless loop in release mode. **This</span>
<span class="doccomment">/// overflow behavior might change in the future.**</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// assert_eq!((2..), std::ops::RangeFrom { start: 2 });</span>
<span class="doccomment">/// assert_eq!(2 + 3 + 4, (2..).take(3).sum());</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let arr = [0, 1, 2, 3];</span>
<span class="doccomment">/// assert_eq!(arr[ .. ], [0,1,2,3]);</span>
<span class="doccomment">/// assert_eq!(arr[ ..3], [0,1,2 ]);</span>
<span class="doccomment">/// assert_eq!(arr[1.. ], [ 1,2,3]); // RangeFrom</span>
<span class="doccomment">/// assert_eq!(arr[1..3], [ 1,2 ]);</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [`Iterator`]: ../iter/trait.IntoIterator.html</span>
<span class="attribute">#[<span class="ident">doc</span>(<span class="ident">alias</span> <span class="op">=</span> <span class="string">".."</span>)]</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>, <span class="ident">PartialEq</span>, <span class="ident">Eq</span>, <span class="ident">Hash</span>)]</span> <span class="comment">// not Copy -- see #27186</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">RangeFrom</span><span class="op"><</span><span class="ident">Idx</span><span class="op">></span> {
<span class="doccomment">/// The lower bound of the range (inclusive).</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="ident">start</span>: <span class="ident">Idx</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">Idx</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">RangeFrom</span><span class="op"><</span><span class="ident">Idx</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">fmt</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="macro">write</span><span class="macro">!</span>(<span class="ident">fmt</span>, <span class="string">"{:?}.."</span>, <span class="self">self</span>.<span class="ident">start</span>)
}
}
<span class="kw">impl</span><span class="op"><</span><span class="ident">Idx</span>: <span class="ident">PartialOrd</span><span class="op"><</span><span class="ident">Idx</span><span class="op">>></span> <span class="ident">RangeFrom</span><span class="op"><</span><span class="ident">Idx</span><span class="op">></span> {
<span class="doccomment">/// Returns `true` if `item` is contained in the range.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// #![feature(range_contains)]</span>
<span class="doccomment">///</span>
<span class="doccomment">/// use std::f32;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// assert!(!(3..).contains(&2));</span>
<span class="doccomment">/// assert!( (3..).contains(&3));</span>
<span class="doccomment">/// assert!( (3..).contains(&1_000_000_000));</span>
<span class="doccomment">///</span>
<span class="doccomment">/// assert!( (0.0..).contains(&0.5));</span>
<span class="doccomment">/// assert!(!(0.0..).contains(&f32::NAN));</span>
<span class="doccomment">/// assert!(!(f32::NAN..).contains(&0.5));</span>
<span class="doccomment">/// ```</span>
<span class="attribute">#[<span class="ident">unstable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"range_contains"</span>, <span class="ident">reason</span> <span class="op">=</span> <span class="string">"recently added as per RFC"</span>, <span class="ident">issue</span> <span class="op">=</span> <span class="string">"32311"</span>)]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">contains</span><span class="op"><</span><span class="ident">U</span><span class="op">></span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">item</span>: <span class="kw-2">&</span><span class="ident">U</span>) <span class="op">-></span> <span class="ident">bool</span>
<span class="kw">where</span>
<span class="ident">Idx</span>: <span class="ident">PartialOrd</span><span class="op"><</span><span class="ident">U</span><span class="op">></span>,
<span class="ident">U</span>: <span class="question-mark">?</span><span class="ident">Sized</span> <span class="op">+</span> <span class="ident">PartialOrd</span><span class="op"><</span><span class="ident">Idx</span><span class="op">></span>,
{
<span class="op"><</span><span class="self">Self</span> <span class="kw">as</span> <span class="ident">RangeBounds</span><span class="op"><</span><span class="ident">Idx</span><span class="op">>></span>::<span class="ident">contains</span>(<span class="self">self</span>, <span class="ident">item</span>)
}
}
<span class="doccomment">/// A range only bounded exclusively above (`..end`).</span>
<span class="doccomment">///</span>
<span class="doccomment">/// The `RangeTo` `..end` contains all values with `x < end`.</span>
<span class="doccomment">/// It cannot serve as an [`Iterator`] because it doesn't have a starting point.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// The `..end` syntax is a `RangeTo`:</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// assert_eq!((..5), std::ops::RangeTo { end: 5 });</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">///</span>
<span class="doccomment">/// It does not have an [`IntoIterator`] implementation, so you can't use it in</span>
<span class="doccomment">/// a `for` loop directly. This won't compile:</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```compile_fail,E0277</span>
<span class="doccomment">/// // error[E0277]: the trait bound `std::ops::RangeTo<{integer}>:</span>
<span class="doccomment">/// // std::iter::Iterator` is not satisfied</span>
<span class="doccomment">/// for i in ..5 {</span>
<span class="doccomment">/// // ...</span>
<span class="doccomment">/// }</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">///</span>
<span class="doccomment">/// When used as a [slicing index], `RangeTo` produces a slice of all array</span>
<span class="doccomment">/// elements before the index indicated by `end`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// let arr = [0, 1, 2, 3];</span>
<span class="doccomment">/// assert_eq!(arr[ .. ], [0,1,2,3]);</span>
<span class="doccomment">/// assert_eq!(arr[ ..3], [0,1,2 ]); // RangeTo</span>
<span class="doccomment">/// assert_eq!(arr[1.. ], [ 1,2,3]);</span>
<span class="doccomment">/// assert_eq!(arr[1..3], [ 1,2 ]);</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [`IntoIterator`]: ../iter/trait.Iterator.html</span>
<span class="doccomment">/// [`Iterator`]: ../iter/trait.IntoIterator.html</span>
<span class="doccomment">/// [slicing index]: ../slice/trait.SliceIndex.html</span>
<span class="attribute">#[<span class="ident">doc</span>(<span class="ident">alias</span> <span class="op">=</span> <span class="string">".."</span>)]</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Copy</span>, <span class="ident">Clone</span>, <span class="ident">PartialEq</span>, <span class="ident">Eq</span>, <span class="ident">Hash</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">RangeTo</span><span class="op"><</span><span class="ident">Idx</span><span class="op">></span> {
<span class="doccomment">/// The upper bound of the range (exclusive).</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="ident">end</span>: <span class="ident">Idx</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">Idx</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">RangeTo</span><span class="op"><</span><span class="ident">Idx</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">fmt</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="macro">write</span><span class="macro">!</span>(<span class="ident">fmt</span>, <span class="string">"..{:?}"</span>, <span class="self">self</span>.<span class="ident">end</span>)
}
}
<span class="kw">impl</span><span class="op"><</span><span class="ident">Idx</span>: <span class="ident">PartialOrd</span><span class="op"><</span><span class="ident">Idx</span><span class="op">>></span> <span class="ident">RangeTo</span><span class="op"><</span><span class="ident">Idx</span><span class="op">></span> {
<span class="doccomment">/// Returns `true` if `item` is contained in the range.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// #![feature(range_contains)]</span>
<span class="doccomment">///</span>
<span class="doccomment">/// use std::f32;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// assert!( (..5).contains(&-1_000_000_000));</span>
<span class="doccomment">/// assert!( (..5).contains(&4));</span>
<span class="doccomment">/// assert!(!(..5).contains(&5));</span>
<span class="doccomment">///</span>
<span class="doccomment">/// assert!( (..1.0).contains(&0.5));</span>
<span class="doccomment">/// assert!(!(..1.0).contains(&f32::NAN));</span>
<span class="doccomment">/// assert!(!(..f32::NAN).contains(&0.5));</span>
<span class="doccomment">/// ```</span>
<span class="attribute">#[<span class="ident">unstable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"range_contains"</span>, <span class="ident">reason</span> <span class="op">=</span> <span class="string">"recently added as per RFC"</span>, <span class="ident">issue</span> <span class="op">=</span> <span class="string">"32311"</span>)]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">contains</span><span class="op"><</span><span class="ident">U</span><span class="op">></span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">item</span>: <span class="kw-2">&</span><span class="ident">U</span>) <span class="op">-></span> <span class="ident">bool</span>
<span class="kw">where</span>
<span class="ident">Idx</span>: <span class="ident">PartialOrd</span><span class="op"><</span><span class="ident">U</span><span class="op">></span>,
<span class="ident">U</span>: <span class="question-mark">?</span><span class="ident">Sized</span> <span class="op">+</span> <span class="ident">PartialOrd</span><span class="op"><</span><span class="ident">Idx</span><span class="op">></span>,
{
<span class="op"><</span><span class="self">Self</span> <span class="kw">as</span> <span class="ident">RangeBounds</span><span class="op"><</span><span class="ident">Idx</span><span class="op">>></span>::<span class="ident">contains</span>(<span class="self">self</span>, <span class="ident">item</span>)
}
}
<span class="doccomment">/// An range bounded inclusively below and above (`start..=end`).</span>
<span class="doccomment">///</span>
<span class="doccomment">/// The `RangeInclusive` `start..=end` contains all values with `x >= start`</span>
<span class="doccomment">/// and `x <= end`. It is empty unless `start <= end`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// This iterator is [fused], but the specific values of `start` and `end` after</span>
<span class="doccomment">/// iteration has finished are **unspecified** other than that [`.is_empty()`]</span>
<span class="doccomment">/// will return `true` once no more values will be produced.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [fused]: ../iter/trait.FusedIterator.html</span>
<span class="doccomment">/// [`.is_empty()`]: #method.is_empty</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// assert_eq!((3..=5), std::ops::RangeInclusive::new(3, 5));</span>
<span class="doccomment">/// assert_eq!(3 + 4 + 5, (3..=5).sum());</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let arr = [0, 1, 2, 3];</span>
<span class="doccomment">/// assert_eq!(arr[ ..=2], [0,1,2 ]);</span>
<span class="doccomment">/// assert_eq!(arr[1..=2], [ 1,2 ]); // RangeInclusive</span>
<span class="doccomment">/// ```</span>
<span class="attribute">#[<span class="ident">doc</span>(<span class="ident">alias</span> <span class="op">=</span> <span class="string">"..="</span>)]</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>, <span class="ident">PartialEq</span>, <span class="ident">Eq</span>, <span class="ident">Hash</span>)]</span> <span class="comment">// not Copy -- see #27186</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"inclusive_range"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.26.0"</span>)]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">RangeInclusive</span><span class="op"><</span><span class="ident">Idx</span><span class="op">></span> {
<span class="comment">// FIXME: The current representation follows RFC 1980,</span>
<span class="comment">// but it is known that LLVM is not able to optimize loops following that RFC.</span>
<span class="comment">// Consider adding an extra `bool` field to indicate emptiness of the range.</span>
<span class="comment">// See #45222 for performance test cases.</span>
<span class="kw">pub</span>(<span class="kw">crate</span>) <span class="ident">start</span>: <span class="ident">Idx</span>,
<span class="kw">pub</span>(<span class="kw">crate</span>) <span class="ident">end</span>: <span class="ident">Idx</span>,
}
<span class="kw">impl</span><span class="op"><</span><span class="ident">Idx</span><span class="op">></span> <span class="ident">RangeInclusive</span><span class="op"><</span><span class="ident">Idx</span><span class="op">></span> {
<span class="doccomment">/// Creates a new inclusive range. Equivalent to writing `start..=end`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use std::ops::RangeInclusive;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// assert_eq!(3..=5, RangeInclusive::new(3, 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">"inclusive_range_methods"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.27.0"</span>)]</span>
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">pub</span> <span class="kw">const</span> <span class="kw">fn</span> <span class="ident">new</span>(<span class="ident">start</span>: <span class="ident">Idx</span>, <span class="ident">end</span>: <span class="ident">Idx</span>) <span class="op">-></span> <span class="self">Self</span> {
<span class="self">Self</span> { <span class="ident">start</span>, <span class="ident">end</span> }
}
<span class="doccomment">/// Returns the lower bound of the range (inclusive).</span>
<span class="doccomment">///</span>
<span class="doccomment">/// When using an inclusive range for iteration, the values of `start()` and</span>
<span class="doccomment">/// [`end()`] are unspecified after the iteration ended. To determine</span>
<span class="doccomment">/// whether the inclusive range is empty, use the [`is_empty()`] method</span>
<span class="doccomment">/// instead of comparing `start() > end()`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Note: the value returned by this method is unspecified after the range</span>
<span class="doccomment">/// has been iterated to exhaustion.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [`end()`]: #method.end</span>
<span class="doccomment">/// [`is_empty()`]: #method.is_empty</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// assert_eq!((3..=5).start(), &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">"inclusive_range_methods"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.27.0"</span>)]</span>
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">start</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="kw-2">&</span><span class="ident">Idx</span> {
<span class="kw-2">&</span><span class="self">self</span>.<span class="ident">start</span>
}
<span class="doccomment">/// Returns the upper bound of the range (inclusive).</span>
<span class="doccomment">///</span>
<span class="doccomment">/// When using an inclusive range for iteration, the values of [`start()`]</span>
<span class="doccomment">/// and `end()` are unspecified after the iteration ended. To determine</span>
<span class="doccomment">/// whether the inclusive range is empty, use the [`is_empty()`] method</span>
<span class="doccomment">/// instead of comparing `start() > end()`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Note: the value returned by this method is unspecified after the range</span>
<span class="doccomment">/// has been iterated to exhaustion.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [`start()`]: #method.start</span>
<span class="doccomment">/// [`is_empty()`]: #method.is_empty</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// assert_eq!((3..=5).end(), &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">"inclusive_range_methods"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.27.0"</span>)]</span>
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">end</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="kw-2">&</span><span class="ident">Idx</span> {
<span class="kw-2">&</span><span class="self">self</span>.<span class="ident">end</span>
}
<span class="doccomment">/// Destructures the `RangeInclusive` into (lower bound, upper (inclusive) bound).</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Note: the value returned by this method is unspecified after the range</span>
<span class="doccomment">/// has been iterated to exhaustion.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// assert_eq!((3..=5).into_inner(), (3, 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">"inclusive_range_methods"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.27.0"</span>)]</span>
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">into_inner</span>(<span class="self">self</span>) <span class="op">-></span> (<span class="ident">Idx</span>, <span class="ident">Idx</span>) {
(<span class="self">self</span>.<span class="ident">start</span>, <span class="self">self</span>.<span class="ident">end</span>)
}
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"inclusive_range"</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">Idx</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">RangeInclusive</span><span class="op"><</span><span class="ident">Idx</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">fmt</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="macro">write</span><span class="macro">!</span>(<span class="ident">fmt</span>, <span class="string">"{:?}..={:?}"</span>, <span class="self">self</span>.<span class="ident">start</span>, <span class="self">self</span>.<span class="ident">end</span>)
}
}
<span class="kw">impl</span><span class="op"><</span><span class="ident">Idx</span>: <span class="ident">PartialOrd</span><span class="op"><</span><span class="ident">Idx</span><span class="op">>></span> <span class="ident">RangeInclusive</span><span class="op"><</span><span class="ident">Idx</span><span class="op">></span> {
<span class="doccomment">/// Returns `true` if `item` is contained in the range.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// #![feature(range_contains)]</span>
<span class="doccomment">///</span>
<span class="doccomment">/// use std::f32;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// assert!(!(3..=5).contains(&2));</span>
<span class="doccomment">/// assert!( (3..=5).contains(&3));</span>
<span class="doccomment">/// assert!( (3..=5).contains(&4));</span>
<span class="doccomment">/// assert!( (3..=5).contains(&5));</span>
<span class="doccomment">/// assert!(!(3..=5).contains(&6));</span>
<span class="doccomment">///</span>
<span class="doccomment">/// assert!( (3..=3).contains(&3));</span>
<span class="doccomment">/// assert!(!(3..=2).contains(&3));</span>
<span class="doccomment">///</span>
<span class="doccomment">/// assert!( (0.0..=1.0).contains(&1.0));</span>
<span class="doccomment">/// assert!(!(0.0..=1.0).contains(&f32::NAN));</span>
<span class="doccomment">/// assert!(!(0.0..=f32::NAN).contains(&0.0));</span>
<span class="doccomment">/// assert!(!(f32::NAN..=1.0).contains(&1.0));</span>
<span class="doccomment">/// ```</span>
<span class="attribute">#[<span class="ident">unstable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"range_contains"</span>, <span class="ident">reason</span> <span class="op">=</span> <span class="string">"recently added as per RFC"</span>, <span class="ident">issue</span> <span class="op">=</span> <span class="string">"32311"</span>)]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">contains</span><span class="op"><</span><span class="ident">U</span><span class="op">></span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">item</span>: <span class="kw-2">&</span><span class="ident">U</span>) <span class="op">-></span> <span class="ident">bool</span>
<span class="kw">where</span>
<span class="ident">Idx</span>: <span class="ident">PartialOrd</span><span class="op"><</span><span class="ident">U</span><span class="op">></span>,
<span class="ident">U</span>: <span class="question-mark">?</span><span class="ident">Sized</span> <span class="op">+</span> <span class="ident">PartialOrd</span><span class="op"><</span><span class="ident">Idx</span><span class="op">></span>,
{
<span class="op"><</span><span class="self">Self</span> <span class="kw">as</span> <span class="ident">RangeBounds</span><span class="op"><</span><span class="ident">Idx</span><span class="op">>></span>::<span class="ident">contains</span>(<span class="self">self</span>, <span class="ident">item</span>)
}
<span class="doccomment">/// Returns `true` if the range contains no items.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// #![feature(range_is_empty)]</span>
<span class="doccomment">///</span>
<span class="doccomment">/// assert!(!(3..=5).is_empty());</span>
<span class="doccomment">/// assert!(!(3..=3).is_empty());</span>
<span class="doccomment">/// assert!( (3..=2).is_empty());</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">///</span>
<span class="doccomment">/// The range is empty if either side is incomparable:</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// #![feature(range_is_empty)]</span>
<span class="doccomment">///</span>
<span class="doccomment">/// use std::f32::NAN;</span>
<span class="doccomment">/// assert!(!(3.0..=5.0).is_empty());</span>
<span class="doccomment">/// assert!( (3.0..=NAN).is_empty());</span>
<span class="doccomment">/// assert!( (NAN..=5.0).is_empty());</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">///</span>
<span class="doccomment">/// This method returns `true` after iteration has finished:</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// #![feature(range_is_empty)]</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let mut r = 3..=5;</span>
<span class="doccomment">/// for _ in r.by_ref() {}</span>
<span class="doccomment">/// // Precise field values are unspecified here</span>
<span class="doccomment">/// assert!(r.is_empty());</span>
<span class="doccomment">/// ```</span>
<span class="attribute">#[<span class="ident">unstable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"range_is_empty"</span>, <span class="ident">reason</span> <span class="op">=</span> <span class="string">"recently added"</span>, <span class="ident">issue</span> <span class="op">=</span> <span class="string">"48111"</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="op">!</span>(<span class="self">self</span>.<span class="ident">start</span> <span class="op"><=</span> <span class="self">self</span>.<span class="ident">end</span>)
}
}
<span class="doccomment">/// A range only bounded inclusively above (`..=end`).</span>
<span class="doccomment">///</span>
<span class="doccomment">/// The `RangeToInclusive` `..=end` contains all values with `x <= end`.</span>
<span class="doccomment">/// It cannot serve as an [`Iterator`] because it doesn't have a starting point.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// The `..=end` syntax is a `RangeToInclusive`:</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// assert_eq!((..=5), std::ops::RangeToInclusive{ end: 5 });</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">///</span>
<span class="doccomment">/// It does not have an [`IntoIterator`] implementation, so you can't use it in a</span>
<span class="doccomment">/// `for` loop directly. This won't compile:</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```compile_fail,E0277</span>
<span class="doccomment">/// // error[E0277]: the trait bound `std::ops::RangeToInclusive<{integer}>:</span>
<span class="doccomment">/// // std::iter::Iterator` is not satisfied</span>
<span class="doccomment">/// for i in ..=5 {</span>
<span class="doccomment">/// // ...</span>
<span class="doccomment">/// }</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">///</span>
<span class="doccomment">/// When used as a [slicing index], `RangeToInclusive` produces a slice of all</span>
<span class="doccomment">/// array elements up to and including the index indicated by `end`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// let arr = [0, 1, 2, 3];</span>
<span class="doccomment">/// assert_eq!(arr[ ..=2], [0,1,2 ]); // RangeToInclusive</span>
<span class="doccomment">/// assert_eq!(arr[1..=2], [ 1,2 ]);</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [`IntoIterator`]: ../iter/trait.Iterator.html</span>
<span class="doccomment">/// [`Iterator`]: ../iter/trait.IntoIterator.html</span>
<span class="doccomment">/// [slicing index]: ../slice/trait.SliceIndex.html</span>
<span class="attribute">#[<span class="ident">doc</span>(<span class="ident">alias</span> <span class="op">=</span> <span class="string">"..="</span>)]</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Copy</span>, <span class="ident">Clone</span>, <span class="ident">PartialEq</span>, <span class="ident">Eq</span>, <span class="ident">Hash</span>)]</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"inclusive_range"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.26.0"</span>)]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">RangeToInclusive</span><span class="op"><</span><span class="ident">Idx</span><span class="op">></span> {
<span class="doccomment">/// The upper bound of the range (inclusive)</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"inclusive_range"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.26.0"</span>)]</span>
<span class="kw">pub</span> <span class="ident">end</span>: <span class="ident">Idx</span>,
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"inclusive_range"</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">Idx</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">RangeToInclusive</span><span class="op"><</span><span class="ident">Idx</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">fmt</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="macro">write</span><span class="macro">!</span>(<span class="ident">fmt</span>, <span class="string">"..={:?}"</span>, <span class="self">self</span>.<span class="ident">end</span>)
}
}
<span class="attribute">#[<span class="ident">unstable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"range_contains"</span>, <span class="ident">reason</span> <span class="op">=</span> <span class="string">"recently added as per RFC"</span>, <span class="ident">issue</span> <span class="op">=</span> <span class="string">"32311"</span>)]</span>
<span class="kw">impl</span><span class="op"><</span><span class="ident">Idx</span>: <span class="ident">PartialOrd</span><span class="op"><</span><span class="ident">Idx</span><span class="op">>></span> <span class="ident">RangeToInclusive</span><span class="op"><</span><span class="ident">Idx</span><span class="op">></span> {
<span class="doccomment">/// Returns `true` if `item` is contained in the range.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// #![feature(range_contains)]</span>
<span class="doccomment">///</span>
<span class="doccomment">/// use std::f32;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// assert!( (..=5).contains(&-1_000_000_000));</span>
<span class="doccomment">/// assert!( (..=5).contains(&5));</span>
<span class="doccomment">/// assert!(!(..=5).contains(&6));</span>
<span class="doccomment">///</span>
<span class="doccomment">/// assert!( (..=1.0).contains(&1.0));</span>
<span class="doccomment">/// assert!(!(..=1.0).contains(&f32::NAN));</span>
<span class="doccomment">/// assert!(!(..=f32::NAN).contains(&0.5));</span>
<span class="doccomment">/// ```</span>
<span class="attribute">#[<span class="ident">unstable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"range_contains"</span>, <span class="ident">reason</span> <span class="op">=</span> <span class="string">"recently added as per RFC"</span>, <span class="ident">issue</span> <span class="op">=</span> <span class="string">"32311"</span>)]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">contains</span><span class="op"><</span><span class="ident">U</span><span class="op">></span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">item</span>: <span class="kw-2">&</span><span class="ident">U</span>) <span class="op">-></span> <span class="ident">bool</span>
<span class="kw">where</span>
<span class="ident">Idx</span>: <span class="ident">PartialOrd</span><span class="op"><</span><span class="ident">U</span><span class="op">></span>,
<span class="ident">U</span>: <span class="question-mark">?</span><span class="ident">Sized</span> <span class="op">+</span> <span class="ident">PartialOrd</span><span class="op"><</span><span class="ident">Idx</span><span class="op">></span>,
{
<span class="op"><</span><span class="self">Self</span> <span class="kw">as</span> <span class="ident">RangeBounds</span><span class="op"><</span><span class="ident">Idx</span><span class="op">>></span>::<span class="ident">contains</span>(<span class="self">self</span>, <span class="ident">item</span>)
}
}
<span class="comment">// RangeToInclusive<Idx> cannot impl From<RangeTo<Idx>></span>
<span class="comment">// because underflow would be possible with (..0).into()</span>
<span class="doccomment">/// An endpoint of a range of keys.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// `Bound`s are range endpoints:</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use std::ops::Bound::*;</span>
<span class="doccomment">/// use std::ops::RangeBounds;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// assert_eq!((..100).start_bound(), Unbounded);</span>
<span class="doccomment">/// assert_eq!((1..12).start_bound(), Included(&1));</span>
<span class="doccomment">/// assert_eq!((1..12).end_bound(), Excluded(&12));</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Using a tuple of `Bound`s as an argument to [`BTreeMap::range`].</span>
<span class="doccomment">/// Note that in most cases, it's better to use range syntax (`1..5`) instead.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use std::collections::BTreeMap;</span>
<span class="doccomment">/// use std::ops::Bound::{Excluded, Included, Unbounded};</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let mut map = BTreeMap::new();</span>
<span class="doccomment">/// map.insert(3, "a");</span>
<span class="doccomment">/// map.insert(5, "b");</span>
<span class="doccomment">/// map.insert(8, "c");</span>
<span class="doccomment">///</span>
<span class="doccomment">/// for (key, value) in map.range((Excluded(3), Included(8))) {</span>
<span class="doccomment">/// println!("{}: {}", key, value);</span>
<span class="doccomment">/// }</span>
<span class="doccomment">///</span>
<span class="doccomment">/// assert_eq!(Some((&3, &"a")), map.range((Unbounded, Included(5))).next());</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [`BTreeMap::range`]: ../../std/collections/btree_map/struct.BTreeMap.html#method.range</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"collections_bound"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.17.0"</span>)]</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>, <span class="ident">Copy</span>, <span class="ident">Debug</span>, <span class="ident">Hash</span>, <span class="ident">PartialEq</span>, <span class="ident">Eq</span>)]</span>
<span class="kw">pub</span> <span class="kw">enum</span> <span class="ident">Bound</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {
<span class="doccomment">/// An inclusive bound.</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"collections_bound"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.17.0"</span>)]</span>
<span class="ident">Included</span>(<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"collections_bound"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.17.0"</span>)]</span> <span class="ident">T</span>),
<span class="doccomment">/// An exclusive bound.</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"collections_bound"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.17.0"</span>)]</span>
<span class="ident">Excluded</span>(<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"collections_bound"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.17.0"</span>)]</span> <span class="ident">T</span>),
<span class="doccomment">/// An infinite endpoint. Indicates that there is no bound in this direction.</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"collections_bound"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.17.0"</span>)]</span>
<span class="ident">Unbounded</span>,
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"collections_range"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.28.0"</span>)]</span>
<span class="doccomment">/// `RangeBounds` is implemented by Rust's built-in range types, produced</span>
<span class="doccomment">/// by range syntax like `..`, `a..`, `..b` or `c..d`.</span>
<span class="kw">pub</span> <span class="kw">trait</span> <span class="ident">RangeBounds</span><span class="op"><</span><span class="ident">T</span>: <span class="question-mark">?</span><span class="ident">Sized</span><span class="op">></span> {
<span class="doccomment">/// Start index bound.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Returns the start value as a `Bound`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// # fn main() {</span>
<span class="doccomment">/// use std::ops::Bound::*;</span>
<span class="doccomment">/// use std::ops::RangeBounds;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// assert_eq!((..10).start_bound(), Unbounded);</span>
<span class="doccomment">/// assert_eq!((3..10).start_bound(), Included(&3));</span>
<span class="doccomment">/// # }</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">"collections_range"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.28.0"</span>)]</span>
<span class="kw">fn</span> <span class="ident">start_bound</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">Bound</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">T</span><span class="op">></span>;
<span class="doccomment">/// End index bound.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Returns the end value as a `Bound`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// # fn main() {</span>
<span class="doccomment">/// use std::ops::Bound::*;</span>
<span class="doccomment">/// use std::ops::RangeBounds;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// assert_eq!((3..).end_bound(), Unbounded);</span>
<span class="doccomment">/// assert_eq!((3..10).end_bound(), Excluded(&10));</span>
<span class="doccomment">/// # }</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">"collections_range"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.28.0"</span>)]</span>
<span class="kw">fn</span> <span class="ident">end_bound</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">Bound</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">T</span><span class="op">></span>;
<span class="doccomment">/// Returns `true` if `item` is contained in the range.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// #![feature(range_contains)]</span>
<span class="doccomment">///</span>
<span class="doccomment">/// use std::f32;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// assert!( (3..5).contains(&4));</span>
<span class="doccomment">/// assert!(!(3..5).contains(&2));</span>
<span class="doccomment">///</span>
<span class="doccomment">/// assert!( (0.0..1.0).contains(&0.5));</span>
<span class="doccomment">/// assert!(!(0.0..1.0).contains(&f32::NAN));</span>
<span class="doccomment">/// assert!(!(0.0..f32::NAN).contains(&0.5));</span>
<span class="doccomment">/// assert!(!(f32::NAN..1.0).contains(&0.5));</span>
<span class="attribute">#[<span class="ident">unstable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"range_contains"</span>, <span class="ident">reason</span> <span class="op">=</span> <span class="string">"recently added as per RFC"</span>, <span class="ident">issue</span> <span class="op">=</span> <span class="string">"32311"</span>)]</span>
<span class="kw">fn</span> <span class="ident">contains</span><span class="op"><</span><span class="ident">U</span><span class="op">></span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">item</span>: <span class="kw-2">&</span><span class="ident">U</span>) <span class="op">-></span> <span class="ident">bool</span>
<span class="kw">where</span>
<span class="ident">T</span>: <span class="ident">PartialOrd</span><span class="op"><</span><span class="ident">U</span><span class="op">></span>,
<span class="ident">U</span>: <span class="question-mark">?</span><span class="ident">Sized</span> <span class="op">+</span> <span class="ident">PartialOrd</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>,
{
(<span class="kw">match</span> <span class="self">self</span>.<span class="ident">start_bound</span>() {
<span class="ident">Included</span>(<span class="kw-2">ref</span> <span class="ident">start</span>) <span class="op">=></span> <span class="kw-2">*</span><span class="ident">start</span> <span class="op"><=</span> <span class="ident">item</span>,
<span class="ident">Excluded</span>(<span class="kw-2">ref</span> <span class="ident">start</span>) <span class="op">=></span> <span class="kw-2">*</span><span class="ident">start</span> <span class="op"><</span> <span class="ident">item</span>,
<span class="ident">Unbounded</span> <span class="op">=></span> <span class="bool-val">true</span>,
})
<span class="op">&&</span>
(<span class="kw">match</span> <span class="self">self</span>.<span class="ident">end_bound</span>() {
<span class="ident">Included</span>(<span class="kw-2">ref</span> <span class="ident">end</span>) <span class="op">=></span> <span class="ident">item</span> <span class="op"><=</span> <span class="kw-2">*</span><span class="ident">end</span>,
<span class="ident">Excluded</span>(<span class="kw-2">ref</span> <span class="ident">end</span>) <span class="op">=></span> <span class="ident">item</span> <span class="op"><</span> <span class="kw-2">*</span><span class="ident">end</span>,
<span class="ident">Unbounded</span> <span class="op">=></span> <span class="bool-val">true</span>,
})
}
}
<span class="kw">use</span> <span class="self">self</span>::<span class="ident">Bound</span>::{<span class="ident">Excluded</span>, <span class="ident">Included</span>, <span class="ident">Unbounded</span>};
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"collections_range"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.28.0"</span>)]</span>
<span class="kw">impl</span><span class="op"><</span><span class="ident">T</span>: <span class="question-mark">?</span><span class="ident">Sized</span><span class="op">></span> <span class="ident">RangeBounds</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="kw">for</span> <span class="ident">RangeFull</span> {
<span class="kw">fn</span> <span class="ident">start_bound</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">Bound</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">T</span><span class="op">></span> {
<span class="ident">Unbounded</span>
}
<span class="kw">fn</span> <span class="ident">end_bound</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">Bound</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">T</span><span class="op">></span> {
<span class="ident">Unbounded</span>
}
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"collections_range"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.28.0"</span>)]</span>
<span class="kw">impl</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="ident">RangeBounds</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="kw">for</span> <span class="ident">RangeFrom</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {
<span class="kw">fn</span> <span class="ident">start_bound</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">Bound</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">T</span><span class="op">></span> {
<span class="ident">Included</span>(<span class="kw-2">&</span><span class="self">self</span>.<span class="ident">start</span>)
}
<span class="kw">fn</span> <span class="ident">end_bound</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">Bound</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">T</span><span class="op">></span> {
<span class="ident">Unbounded</span>
}
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"collections_range"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.28.0"</span>)]</span>
<span class="kw">impl</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="ident">RangeBounds</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="kw">for</span> <span class="ident">RangeTo</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {
<span class="kw">fn</span> <span class="ident">start_bound</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">Bound</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">T</span><span class="op">></span> {
<span class="ident">Unbounded</span>
}
<span class="kw">fn</span> <span class="ident">end_bound</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">Bound</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">T</span><span class="op">></span> {
<span class="ident">Excluded</span>(<span class="kw-2">&</span><span class="self">self</span>.<span class="ident">end</span>)
}
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"collections_range"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.28.0"</span>)]</span>
<span class="kw">impl</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="ident">RangeBounds</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="kw">for</span> <span class="ident">Range</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {
<span class="kw">fn</span> <span class="ident">start_bound</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">Bound</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">T</span><span class="op">></span> {
<span class="ident">Included</span>(<span class="kw-2">&</span><span class="self">self</span>.<span class="ident">start</span>)
}
<span class="kw">fn</span> <span class="ident">end_bound</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">Bound</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">T</span><span class="op">></span> {
<span class="ident">Excluded</span>(<span class="kw-2">&</span><span class="self">self</span>.<span class="ident">end</span>)
}
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"collections_range"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.28.0"</span>)]</span>
<span class="kw">impl</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="ident">RangeBounds</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="kw">for</span> <span class="ident">RangeInclusive</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {
<span class="kw">fn</span> <span class="ident">start_bound</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">Bound</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">T</span><span class="op">></span> {
<span class="ident">Included</span>(<span class="kw-2">&</span><span class="self">self</span>.<span class="ident">start</span>)
}
<span class="kw">fn</span> <span class="ident">end_bound</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">Bound</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">T</span><span class="op">></span> {
<span class="ident">Included</span>(<span class="kw-2">&</span><span class="self">self</span>.<span class="ident">end</span>)
}
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"collections_range"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.28.0"</span>)]</span>
<span class="kw">impl</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="ident">RangeBounds</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="kw">for</span> <span class="ident">RangeToInclusive</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {
<span class="kw">fn</span> <span class="ident">start_bound</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">Bound</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">T</span><span class="op">></span> {
<span class="ident">Unbounded</span>
}
<span class="kw">fn</span> <span class="ident">end_bound</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">Bound</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">T</span><span class="op">></span> {
<span class="ident">Included</span>(<span class="kw-2">&</span><span class="self">self</span>.<span class="ident">end</span>)
}
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"collections_range"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.28.0"</span>)]</span>
<span class="kw">impl</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="ident">RangeBounds</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="kw">for</span> (<span class="ident">Bound</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>, <span class="ident">Bound</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>) {
<span class="kw">fn</span> <span class="ident">start_bound</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">Bound</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">T</span><span class="op">></span> {
<span class="kw">match</span> <span class="kw-2">*</span><span class="self">self</span> {
(<span class="ident">Included</span>(<span class="kw-2">ref</span> <span class="ident">start</span>), <span class="kw">_</span>) <span class="op">=></span> <span class="ident">Included</span>(<span class="ident">start</span>),
(<span class="ident">Excluded</span>(<span class="kw-2">ref</span> <span class="ident">start</span>), <span class="kw">_</span>) <span class="op">=></span> <span class="ident">Excluded</span>(<span class="ident">start</span>),
(<span class="ident">Unbounded</span>, <span class="kw">_</span>) <span class="op">=></span> <span class="ident">Unbounded</span>,
}
}
<span class="kw">fn</span> <span class="ident">end_bound</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">Bound</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">T</span><span class="op">></span> {
<span class="kw">match</span> <span class="kw-2">*</span><span class="self">self</span> {
(<span class="kw">_</span>, <span class="ident">Included</span>(<span class="kw-2">ref</span> <span class="ident">end</span>)) <span class="op">=></span> <span class="ident">Included</span>(<span class="ident">end</span>),
(<span class="kw">_</span>, <span class="ident">Excluded</span>(<span class="kw-2">ref</span> <span class="ident">end</span>)) <span class="op">=></span> <span class="ident">Excluded</span>(<span class="ident">end</span>),
(<span class="kw">_</span>, <span class="ident">Unbounded</span>) <span class="op">=></span> <span class="ident">Unbounded</span>,
}
}
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"collections_range"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.28.0"</span>)]</span>
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span>: <span class="question-mark">?</span><span class="ident">Sized</span> <span class="op">+</span> <span class="lifetime">'a</span><span class="op">></span> <span class="ident">RangeBounds</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="kw">for</span> (<span class="ident">Bound</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="ident">Bound</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">fn</span> <span class="ident">start_bound</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">Bound</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">T</span><span class="op">></span> {
<span class="self">self</span>.<span class="number">0</span>
}
<span class="kw">fn</span> <span class="ident">end_bound</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">Bound</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">T</span><span class="op">></span> {
<span class="self">self</span>.<span class="number">1</span>
}
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"collections_range"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.28.0"</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">RangeBounds</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="kw">for</span> <span class="ident">RangeFrom</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">fn</span> <span class="ident">start_bound</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">Bound</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">T</span><span class="op">></span> {
<span class="ident">Included</span>(<span class="self">self</span>.<span class="ident">start</span>)
}
<span class="kw">fn</span> <span class="ident">end_bound</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">Bound</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">T</span><span class="op">></span> {
<span class="ident">Unbounded</span>
}
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"collections_range"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.28.0"</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">RangeBounds</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="kw">for</span> <span class="ident">RangeTo</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">fn</span> <span class="ident">start_bound</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">Bound</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">T</span><span class="op">></span> {
<span class="ident">Unbounded</span>
}
<span class="kw">fn</span> <span class="ident">end_bound</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">Bound</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">T</span><span class="op">></span> {
<span class="ident">Excluded</span>(<span class="self">self</span>.<span class="ident">end</span>)
}
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"collections_range"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.28.0"</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">RangeBounds</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="kw">for</span> <span class="ident">Range</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">fn</span> <span class="ident">start_bound</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">Bound</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">T</span><span class="op">></span> {
<span class="ident">Included</span>(<span class="self">self</span>.<span class="ident">start</span>)
}
<span class="kw">fn</span> <span class="ident">end_bound</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">Bound</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">T</span><span class="op">></span> {
<span class="ident">Excluded</span>(<span class="self">self</span>.<span class="ident">end</span>)
}
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"collections_range"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.28.0"</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">RangeBounds</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="kw">for</span> <span class="ident">RangeInclusive</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">fn</span> <span class="ident">start_bound</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">Bound</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">T</span><span class="op">></span> {
<span class="ident">Included</span>(<span class="self">self</span>.<span class="ident">start</span>)
}
<span class="kw">fn</span> <span class="ident">end_bound</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">Bound</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">T</span><span class="op">></span> {
<span class="ident">Included</span>(<span class="self">self</span>.<span class="ident">end</span>)
}
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"collections_range"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.28.0"</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">RangeBounds</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="kw">for</span> <span class="ident">RangeToInclusive</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">fn</span> <span class="ident">start_bound</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">Bound</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">T</span><span class="op">></span> {
<span class="ident">Unbounded</span>
}
<span class="kw">fn</span> <span class="ident">end_bound</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">Bound</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">T</span><span class="op">></span> {
<span class="ident">Included</span>(<span class="self">self</span>.<span class="ident">end</span>)
}
}
</pre>
</section><section id="search" class="content hidden"></section><section class="footer"></section><aside id="help" class="hidden"><div><h1 class="hidden">Help</h1><div class="shortcuts"><h2>Keyboard Shortcuts</h2><dl><dt><kbd>?</kbd></dt><dd>Show this help dialog</dd><dt><kbd>S</kbd></dt><dd>Focus the search field</dd><dt><kbd>↑</kbd></dt><dd>Move up in search results</dd><dt><kbd>↓</kbd></dt><dd>Move down in search results</dd><dt><kbd>↹</kbd></dt><dd>Switch tab</dd><dt><kbd>⏎</kbd></dt><dd>Go to active search result</dd><dt><kbd>+</kbd></dt><dd>Expand all sections</dd><dt><kbd>-</kbd></dt><dd>Collapse all sections</dd></dl></div><div class="infos"><h2>Search Tricks</h2><p>Prefix searches with a type followed by a colon (e.g. <code>fn:</code>) to restrict the search to a given type.</p><p>Accepted types are: <code>fn</code>, <code>mod</code>, <code>struct</code>, <code>enum</code>, <code>trait</code>, <code>type</code>, <code>macro</code>, and <code>const</code>.</p><p>Search functions by type signature (e.g. <code>vec -> usize</code> or <code>* -> vec</code>)</p><p>Search multiple things at once by splitting your query with comma (e.g. <code>str,u8</code> or <code>String,struct:Vec,test</code>)</p></div></div></aside><script>window.rootPath = "../../../";window.currentCrate = "core";</script><script src="../../../aliases.js"></script><script src="../../../main.js"></script><script defer src="../../../search-index.js"></script></body></html>
