<!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 `Not` trait in crate `std`."> <meta name="keywords" content="rust, rustlang, rust-lang, Not"> <title>std::ops::Not - Rust</title> <link rel="stylesheet" type="text/css" href="../../normalize.css"> <link rel="stylesheet" type="text/css" href="../../rustdoc.css"> <link rel="stylesheet" type="text/css" href="../../main.css"> <link rel="shortcut icon" href="https://doc.rust-lang.org/favicon.ico"> </head> <body class="rustdoc trait"> <!--[if lte IE 8]> <div class="warning"> This old browser is unsupported and will most likely display funky things. </div> <![endif]--> <nav class="sidebar"> <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'>Trait Not</p><div class="block items"><ul><li><a href="#associated-types">Associated Types</a></li><li><a href="#required-methods">Required Methods</a></li><li><a href="#implementors">Implementors</a></li></ul></div><p class='location'><a href='../index.html'>std</a>::<wbr><a href='index.html'>ops</a></p><script>window.sidebarCurrent = {name: 'Not', ty: 'trait', relpath: ''};</script><script defer src="sidebar-items.js"></script> </nav> <nav class="sub"> <form class="search-form js-only"> <div class="search-container"> <input class="search-input" name="search" autocomplete="off" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"> </div> </form> </nav> <section id='main' class="content"> <h1 class='fqn'><span class='in-band'>Trait <a href='../index.html'>std</a>::<wbr><a href='index.html'>ops</a>::<wbr><a class="trait" href=''>Not</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/ops.rs.html#889-897' title='goto source code'>[src]</a></span></h1> <pre class='rust trait'><div class="docblock attributes">#[lang = "not"] </div>pub trait Not { type <a href='#associatedtype.Output' class="type">Output</a>; fn <a href='#tymethod.not' class='fnname'>not</a>(self) -> Self::<a class="trait" href="../../std/ops/trait.Not.html" title="trait std::ops::Not">Output</a>; }</pre><div class='docblock'><p>The unary logical negation operator <code>!</code>.</p> <h1 id='examples' class='section-header'><a href='#examples'>Examples</a></h1> <p>An implementation of <code>Not</code> for <code>Answer</code>, which enables the use of <code>!</code> to invert its value.</p> <pre class="rust rust-example-rendered"> <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">ops</span>::<span class="ident">Not</span>; <span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Debug</span>, <span class="ident">PartialEq</span>)]</span> <span class="kw">enum</span> <span class="ident">Answer</span> { <span class="ident">Yes</span>, <span class="ident">No</span>, } <span class="kw">impl</span> <span class="ident">Not</span> <span class="kw">for</span> <span class="ident">Answer</span> { <span class="kw">type</span> <span class="ident">Output</span> <span class="op">=</span> <span class="ident">Answer</span>; <span class="kw">fn</span> <span class="ident">not</span>(<span class="self">self</span>) <span class="op">-></span> <span class="ident">Answer</span> { <span class="kw">match</span> <span class="self">self</span> { <span class="ident">Answer</span>::<span class="ident">Yes</span> <span class="op">=></span> <span class="ident">Answer</span>::<span class="ident">No</span>, <span class="ident">Answer</span>::<span class="ident">No</span> <span class="op">=></span> <span class="ident">Answer</span>::<span class="ident">Yes</span> } } } <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="op">!</span><span class="ident">Answer</span>::<span class="ident">Yes</span>, <span class="ident">Answer</span>::<span class="ident">No</span>); <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="op">!</span><span class="ident">Answer</span>::<span class="ident">No</span>, <span class="ident">Answer</span>::<span class="ident">Yes</span>);<a class="test-arrow" target="_blank" href="https://play.rust-lang.org/?code=fn%20main()%20%7B%0Ause%20std%3A%3Aops%3A%3ANot%3B%0A%0A%23%5Bderive(Debug%2C%20PartialEq)%5D%0Aenum%20Answer%20%7B%0A%20%20%20%20Yes%2C%0A%20%20%20%20No%2C%0A%7D%0A%0Aimpl%20Not%20for%20Answer%20%7B%0A%20%20%20%20type%20Output%20%3D%20Answer%3B%0A%0A%20%20%20%20fn%20not(self)%20-%3E%20Answer%20%7B%0A%20%20%20%20%20%20%20%20match%20self%20%7B%0A%20%20%20%20%20%20%20%20%20%20%20%20Answer%3A%3AYes%20%3D%3E%20Answer%3A%3ANo%2C%0A%20%20%20%20%20%20%20%20%20%20%20%20Answer%3A%3ANo%20%3D%3E%20Answer%3A%3AYes%0A%20%20%20%20%20%20%20%20%7D%0A%20%20%20%20%7D%0A%7D%0A%0Aassert_eq!(!Answer%3A%3AYes%2C%20Answer%3A%3ANo)%3B%0Aassert_eq!(!Answer%3A%3ANo%2C%20Answer%3A%3AYes)%3B%0A%7D">Run</a></pre> </div> <h2 id='associated-types'>Associated Types</h2> <div class='methods'> <h3 id='associatedtype.Output' class='method'><span id='Output.t' class='invisible'><code>type <a href='#associatedtype.Output' class="type">Output</a></code></span></h3><div class='docblock'><p>The resulting type after applying the <code>!</code> operator</p> </div></div> <h2 id='required-methods'>Required Methods</h2> <div class='methods'> <h3 id='tymethod.not' class='method'><span id='not.v' class='invisible'><code>fn <a href='#tymethod.not' class='fnname'>not</a>(self) -> Self::<a class="trait" href="../../std/ops/trait.Not.html" title="trait std::ops::Not">Output</a></code></span></h3><div class='docblock'><p>The method for the unary <code>!</code> operator</p> </div></div> <h2 id='implementors'>Implementors</h2> <ul class='item-list' id='implementors-list'> <li><code>impl Not for <a class="primitive" href="../primitive.i128.html">i128</a></code></li> <li><code>impl<'a> Not for &'a <a class="struct" href="../../std/num/struct.Wrapping.html" title="struct std::num::Wrapping">Wrapping</a><<a class="primitive" href="../primitive.i128.html">i128</a>></code></li> <li><code>impl Not for <a class="primitive" href="../primitive.isize.html">isize</a></code></li> <li><code>impl<'a> Not for &'a <a class="primitive" href="../primitive.u32.html">u32</a></code></li> <li><code>impl Not for <a class="struct" href="../../std/num/struct.Wrapping.html" title="struct std::num::Wrapping">Wrapping</a><<a class="primitive" href="../primitive.i128.html">i128</a>></code></li> <li><code>impl<'a> Not for &'a <a class="struct" href="../../std/num/struct.Wrapping.html" title="struct std::num::Wrapping">Wrapping</a><<a class="primitive" href="../primitive.i16.html">i16</a>></code></li> <li><code>impl<'a> Not for &'a <a class="struct" href="../../std/num/struct.Wrapping.html" title="struct std::num::Wrapping">Wrapping</a><<a class="primitive" href="../primitive.u8.html">u8</a>></code></li> <li><code>impl Not for <a class="struct" href="../../std/num/struct.Wrapping.html" title="struct std::num::Wrapping">Wrapping</a><<a class="primitive" href="../primitive.i64.html">i64</a>></code></li> <li><code>impl<'a> Not for &'a <a class="primitive" href="../primitive.u16.html">u16</a></code></li> <li><code>impl<'a> Not for &'a <a class="struct" href="../../std/num/struct.Wrapping.html" title="struct std::num::Wrapping">Wrapping</a><<a class="primitive" href="../primitive.usize.html">usize</a>></code></li> <li><code>impl<'a> Not for &'a <a class="primitive" href="../primitive.u128.html">u128</a></code></li> <li><code>impl Not for <a class="struct" href="../../std/num/struct.Wrapping.html" title="struct std::num::Wrapping">Wrapping</a><<a class="primitive" href="../primitive.isize.html">isize</a>></code></li> <li><code>impl Not for <a class="struct" href="../../std/num/struct.Wrapping.html" title="struct std::num::Wrapping">Wrapping</a><<a class="primitive" href="../primitive.u64.html">u64</a>></code></li> <li><code>impl Not for <a class="struct" href="../../std/num/struct.Wrapping.html" title="struct std::num::Wrapping">Wrapping</a><<a class="primitive" href="../primitive.u128.html">u128</a>></code></li> <li><code>impl Not for <a class="primitive" href="../primitive.i32.html">i32</a></code></li> <li><code>impl<'a> Not for &'a <a class="primitive" href="../primitive.i8.html">i8</a></code></li> <li><code>impl<'a> Not for &'a <a class="struct" href="../../std/num/struct.Wrapping.html" title="struct std::num::Wrapping">Wrapping</a><<a class="primitive" href="../primitive.i8.html">i8</a>></code></li> <li><code>impl<'a> Not for &'a <a class="struct" href="../../std/num/struct.Wrapping.html" title="struct std::num::Wrapping">Wrapping</a><<a class="primitive" href="../primitive.u128.html">u128</a>></code></li> <li><code>impl<'a> Not for &'a <a class="struct" href="../../std/num/struct.Wrapping.html" title="struct std::num::Wrapping">Wrapping</a><<a class="primitive" href="../primitive.u16.html">u16</a>></code></li> <li><code>impl Not for <a class="primitive" href="../primitive.i64.html">i64</a></code></li> <li><code>impl Not for <a class="primitive" href="../primitive.u64.html">u64</a></code></li> <li><code>impl Not for <a class="struct" href="../../std/num/struct.Wrapping.html" title="struct std::num::Wrapping">Wrapping</a><<a class="primitive" href="../primitive.i32.html">i32</a>></code></li> <li><code>impl Not for <a class="struct" href="../../std/num/struct.Wrapping.html" title="struct std::num::Wrapping">Wrapping</a><<a class="primitive" href="../primitive.u32.html">u32</a>></code></li> <li><code>impl<'a> Not for &'a <a class="struct" href="../../std/num/struct.Wrapping.html" title="struct std::num::Wrapping">Wrapping</a><<a class="primitive" href="../primitive.i64.html">i64</a>></code></li> <li><code>impl<'a> Not for &'a <a class="primitive" href="../primitive.i32.html">i32</a></code></li> <li><code>impl Not for <a class="primitive" href="../primitive.bool.html">bool</a></code></li> <li><code>impl Not for <a class="struct" href="../../std/num/struct.Wrapping.html" title="struct std::num::Wrapping">Wrapping</a><<a class="primitive" href="../primitive.usize.html">usize</a>></code></li> <li><code>impl<'a> Not for &'a <a class="primitive" href="../primitive.isize.html">isize</a></code></li> <li><code>impl Not for <a class="primitive" href="../primitive.usize.html">usize</a></code></li> <li><code>impl<'a> Not for &'a <a class="struct" href="../../std/num/struct.Wrapping.html" title="struct std::num::Wrapping">Wrapping</a><<a class="primitive" href="../primitive.u64.html">u64</a>></code></li> <li><code>impl<'a> Not for &'a <a class="primitive" href="../primitive.usize.html">usize</a></code></li> <li><code>impl Not for <a class="primitive" href="../primitive.u32.html">u32</a></code></li> <li><code>impl Not for <a class="primitive" href="../primitive.i16.html">i16</a></code></li> <li><code>impl<'a> Not for &'a <a class="struct" href="../../std/num/struct.Wrapping.html" title="struct std::num::Wrapping">Wrapping</a><<a class="primitive" href="../primitive.i32.html">i32</a>></code></li> <li><code>impl Not for <a class="primitive" href="../primitive.i8.html">i8</a></code></li> <li><code>impl Not for <a class="primitive" href="../primitive.u128.html">u128</a></code></li> <li><code>impl<'a> Not for &'a <a class="primitive" href="../primitive.bool.html">bool</a></code></li> <li><code>impl<'a> Not for &'a <a class="primitive" href="../primitive.i16.html">i16</a></code></li> <li><code>impl Not for <a class="struct" href="../../std/num/struct.Wrapping.html" title="struct std::num::Wrapping">Wrapping</a><<a class="primitive" href="../primitive.u8.html">u8</a>></code></li> <li><code>impl Not for <a class="struct" href="../../std/num/struct.Wrapping.html" title="struct std::num::Wrapping">Wrapping</a><<a class="primitive" href="../primitive.i16.html">i16</a>></code></li> <li><code>impl<'a> Not for &'a <a class="primitive" href="../primitive.i64.html">i64</a></code></li> <li><code>impl Not for <a class="primitive" href="../primitive.u8.html">u8</a></code></li> <li><code>impl<'a> Not for &'a <a class="struct" href="../../std/num/struct.Wrapping.html" title="struct std::num::Wrapping">Wrapping</a><<a class="primitive" href="../primitive.isize.html">isize</a>></code></li> <li><code>impl<'a> Not for &'a <a class="primitive" href="../primitive.u8.html">u8</a></code></li> <li><code>impl<'a> Not for &'a <a class="struct" href="../../std/num/struct.Wrapping.html" title="struct std::num::Wrapping">Wrapping</a><<a class="primitive" href="../primitive.u32.html">u32</a>></code></li> <li><code>impl<'a> Not for &'a <a class="primitive" href="../primitive.u64.html">u64</a></code></li> <li><code>impl Not for <a class="struct" href="../../std/num/struct.Wrapping.html" title="struct std::num::Wrapping">Wrapping</a><<a class="primitive" href="../primitive.u16.html">u16</a>></code></li> <li><code>impl Not for <a class="struct" href="../../std/num/struct.Wrapping.html" title="struct std::num::Wrapping">Wrapping</a><<a class="primitive" href="../primitive.i8.html">i8</a>></code></li> <li><code>impl Not for <a class="primitive" href="../primitive.u16.html">u16</a></code></li> <li><code>impl<'a> Not for &'a <a class="primitive" href="../primitive.i128.html">i128</a></code></li> </ul><script type="text/javascript" async src="../../implementors/core/ops/trait.Not.js"> </script></section> <section id='search' class="content hidden"></section> <section class="footer"></section> <aside id="help" class="hidden"> <div> <h1 class="hidden">Help</h1> <div class="shortcuts"> <h2>Keyboard Shortcuts</h2> <dl> <dt>?</dt> <dd>Show this help dialog</dd> <dt>S</dt> <dd>Focus the search field</dd> <dt>⇤</dt> <dd>Move up in search results</dd> <dt>⇥</dt> <dd>Move down in search results</dd> <dt>⏎</dt> <dd>Go to active search result</dd> <dt>+</dt> <dd>Collapse/expand all sections</dd> </dl> </div> <div class="infos"> <h2>Search Tricks</h2> <p> Prefix searches with a type followed by a colon (e.g. <code>fn:</code>) to restrict the search to a given type. </p> <p> Accepted types are: 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