<!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="API documentation for the Rust `cmp` mod in crate `std`."><meta name="keywords" content="rust, rustlang, rust-lang, cmp"><title>std::cmp - Rust</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 mod"><!--[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='../../std/index.html'><img src='https://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png' alt='logo' width='100'></a><p class='location'>Module cmp</p><div class="sidebar-elems"><div class="block items"><ul><li><a href="#structs">Structs</a></li><li><a href="#enums">Enums</a></li><li><a href="#traits">Traits</a></li><li><a href="#functions">Functions</a></li></ul></div><p class='location'><a href='../index.html'>std</a></p><script>window.sidebarCurrent = {name: 'cmp', ty: 'mod', relpath: '../'};</script><script defer src="../sidebar-items.js"></script></div></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"><h1 class='fqn'><span class='in-band'>Module <a href='../index.html'>std</a>::<wbr><a class="mod" href=''>cmp</a></span><span class='out-of-band'><span class='since' title='Stable since Rust version 1.0.0'>1.0.0</span><span id='render-detail'><a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class='inner'>−</span>]</a></span><a class='srclink' href='../../src/core/lib.rs.html#181' title='goto source code'>[src]</a></span></h1><div class='docblock'><p>Functionality for ordering and comparison.</p>
<p>This module defines both <a href="trait.PartialOrd.html"><code>PartialOrd</code></a> and <a href="trait.PartialEq.html"><code>PartialEq</code></a> traits which are used
by the compiler to implement comparison operators. Rust programs may
implement <a href="trait.PartialOrd.html"><code>PartialOrd</code></a> to overload the <code><</code>, <code><=</code>, <code>></code>, and <code>>=</code> operators,
and may implement <a href="trait.PartialEq.html"><code>PartialEq</code></a> to overload the <code>==</code> and <code>!=</code> operators.</p>
<h1 id="examples" class="section-header"><a href="#examples">Examples</a></h1>
<pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="ident">x</span>: <span class="ident">u32</span> <span class="op">=</span> <span class="number">0</span>;
<span class="kw">let</span> <span class="ident">y</span>: <span class="ident">u32</span> <span class="op">=</span> <span class="number">1</span>;
<span class="comment">// these two lines are equivalent</span>
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">x</span> <span class="op"><</span> <span class="ident">y</span>, <span class="bool-val">true</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">x</span>.<span class="ident">lt</span>(<span class="kw-2">&</span><span class="ident">y</span>), <span class="bool-val">true</span>);
<span class="comment">// these two lines are also equivalent</span>
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">x</span> <span class="op">==</span> <span class="ident">y</span>, <span class="bool-val">false</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">x</span>.<span class="ident">eq</span>(<span class="kw-2">&</span><span class="ident">y</span>), <span class="bool-val">false</span>);<a class="test-arrow" target="_blank" href="https://play.rust-lang.org/?code=%23!%5Ballow(unused)%5D%0Afn%20main()%20%7B%0Alet%20x%3A%20u32%20%3D%200%3B%0Alet%20y%3A%20u32%20%3D%201%3B%0A%0A%2F%2F%20these%20two%20lines%20are%20equivalent%0Aassert_eq!(x%20%3C%20y%2C%20true)%3B%0Aassert_eq!(x.lt(%26y)%2C%20true)%3B%0A%0A%2F%2F%20these%20two%20lines%20are%20also%20equivalent%0Aassert_eq!(x%20%3D%3D%20y%2C%20false)%3B%0Aassert_eq!(x.eq(%26y)%2C%20false)%3B%0A%7D">Run</a></pre>
</div><h2 id='structs' class='section-header'><a href="#structs">Structs</a></h2>
<table>
<tr class=' module-item'>
<td><a class="struct" href="struct.Reverse.html"
title='struct std::cmp::Reverse'>Reverse</a></td>
<td class='docblock-short'>
<p>A helper struct for reverse ordering.</p>
</td>
</tr></table><h2 id='enums' class='section-header'><a href="#enums">Enums</a></h2>
<table>
<tr class=' module-item'>
<td><a class="enum" href="enum.Ordering.html"
title='enum std::cmp::Ordering'>Ordering</a></td>
<td class='docblock-short'>
<p>An <code>Ordering</code> is the result of a comparison between two values.</p>
</td>
</tr></table><h2 id='traits' class='section-header'><a href="#traits">Traits</a></h2>
<table>
<tr class=' module-item'>
<td><a class="trait" href="trait.Eq.html"
title='trait std::cmp::Eq'>Eq</a></td>
<td class='docblock-short'>
<p>Trait for equality comparisons which are <a href="https://en.wikipedia.org/wiki/Equivalence_relation">equivalence relations</a>.</p>
</td>
</tr>
<tr class=' module-item'>
<td><a class="trait" href="trait.Ord.html"
title='trait std::cmp::Ord'>Ord</a></td>
<td class='docblock-short'>
<p>Trait for types that form a <a href="https://en.wikipedia.org/wiki/Total_order">total order</a>.</p>
</td>
</tr>
<tr class=' module-item'>
<td><a class="trait" href="trait.PartialEq.html"
title='trait std::cmp::PartialEq'>PartialEq</a></td>
<td class='docblock-short'>
<p>Trait for equality comparisons which are <a href="http://en.wikipedia.org/wiki/Partial_equivalence_relation">partial equivalence
relations</a>.</p>
</td>
</tr>
<tr class=' module-item'>
<td><a class="trait" href="trait.PartialOrd.html"
title='trait std::cmp::PartialOrd'>PartialOrd</a></td>
<td class='docblock-short'>
<p>Trait for values that can be compared for a sort-order.</p>
</td>
</tr></table><h2 id='functions' class='section-header'><a href="#functions">Functions</a></h2>
<table>
<tr class=' module-item'>
<td><a class="fn" href="fn.max.html"
title='fn std::cmp::max'>max</a></td>
<td class='docblock-short'>
<p>Compares and returns the maximum of two values.</p>
</td>
</tr>
<tr class=' module-item'>
<td><a class="fn" href="fn.min.html"
title='fn std::cmp::min'>min</a></td>
<td class='docblock-short'>
<p>Compares and returns the minimum of two values.</p>
</td>
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