<!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 `MulAssign` trait in crate `core`."> <meta name="keywords" content="rust, rustlang, rust-lang, MulAssign"> <title>core::ops::MulAssign - 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='../../core/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 MulAssign</p><div class="block items"><ul><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'>core</a>::<wbr><a href='index.html'>ops</a></p><script>window.sidebarCurrent = {name: 'MulAssign', 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'>core</a>::<wbr><a href='index.html'>ops</a>::<wbr><a class="trait" href=''>MulAssign</a></span><span class='out-of-band'><span class='since' title='Stable since Rust version 1.8.0'>1.8.0</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#1519-1523' title='goto source code'>[src]</a></span></h1> <pre class='rust trait'><div class="docblock attributes">#[lang = "mul_assign"] </div>pub trait MulAssign<Rhs = Self> { fn <a href='#tymethod.mul_assign' class='fnname'>mul_assign</a>(&mut self, rhs: Rhs); }</pre><div class='docblock'><p>The multiplication assignment operator <code>*=</code>.</p> <h1 id='examples' class='section-header'><a href='#examples'>Examples</a></h1> <p>A trivial implementation of <code>MulAssign</code>. When <code>Foo *= Foo</code> happens, it ends up calling <code>mul_assign</code>, and therefore, <code>main</code> prints <code>Multiplying!</code>.</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">MulAssign</span>; <span class="kw">struct</span> <span class="ident">Foo</span>; <span class="kw">impl</span> <span class="ident">MulAssign</span> <span class="kw">for</span> <span class="ident">Foo</span> { <span class="kw">fn</span> <span class="ident">mul_assign</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">_rhs</span>: <span class="ident">Foo</span>) { <span class="macro">println</span><span class="macro">!</span>(<span class="string">"Multiplying!"</span>); } } <span class="kw">fn</span> <span class="ident">main</span>() { <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">foo</span> <span class="op">=</span> <span class="ident">Foo</span>; <span class="ident">foo</span> <span class="op">*=</span> <span class="ident">Foo</span>; }<a class="test-arrow" target="_blank" href="https://play.rust-lang.org/?code=use%20std%3A%3Aops%3A%3AMulAssign%3B%0A%0Astruct%20Foo%3B%0A%0Aimpl%20MulAssign%20for%20Foo%20%7B%0A%20%20%20%20fn%20mul_assign(%26mut%20self%2C%20_rhs%3A%20Foo)%20%7B%0A%20%20%20%20%20%20%20%20println!(%22Multiplying!%22)%3B%0A%20%20%20%20%7D%0A%7D%0A%0A%23%5Ballow(unused_assignments)%5D%0Afn%20main()%20%7B%0A%20%20%20%20let%20mut%20foo%20%3D%20Foo%3B%0A%20%20%20%20foo%20*%3D%20Foo%3B%0A%7D%0A">Run</a></pre> </div> <h2 id='required-methods'>Required Methods</h2> <div class='methods'> <h3 id='tymethod.mul_assign' class='method'><span id='mul_assign.v' class='invisible'><code>fn <a href='#tymethod.mul_assign' class='fnname'>mul_assign</a>(&mut self, rhs: Rhs)</code></span></h3><div class='docblock'><p>The method for the <code>*=</code> operator</p> </div></div> <h2 id='implementors'>Implementors</h2> <ul class='item-list' id='implementors-list'> <li><code>impl MulAssign for <a class="struct" href="../../core/num/struct.Wrapping.html" title="struct core::num::Wrapping">Wrapping</a><usize></code></li> <li><code>impl MulAssign for <a class="struct" href="../../core/num/struct.Wrapping.html" title="struct core::num::Wrapping">Wrapping</a><u8></code></li> <li><code>impl MulAssign for <a class="struct" href="../../core/num/struct.Wrapping.html" title="struct core::num::Wrapping">Wrapping</a><u16></code></li> <li><code>impl MulAssign for <a class="struct" href="../../core/num/struct.Wrapping.html" title="struct core::num::Wrapping">Wrapping</a><u32></code></li> <li><code>impl MulAssign for <a class="struct" href="../../core/num/struct.Wrapping.html" title="struct core::num::Wrapping">Wrapping</a><u64></code></li> <li><code>impl MulAssign for <a class="struct" href="../../core/num/struct.Wrapping.html" title="struct core::num::Wrapping">Wrapping</a><u128></code></li> <li><code>impl MulAssign for <a class="struct" href="../../core/num/struct.Wrapping.html" title="struct core::num::Wrapping">Wrapping</a><isize></code></li> <li><code>impl MulAssign for <a class="struct" href="../../core/num/struct.Wrapping.html" title="struct core::num::Wrapping">Wrapping</a><i8></code></li> <li><code>impl MulAssign for <a class="struct" href="../../core/num/struct.Wrapping.html" title="struct core::num::Wrapping">Wrapping</a><i16></code></li> <li><code>impl MulAssign for <a class="struct" href="../../core/num/struct.Wrapping.html" title="struct core::num::Wrapping">Wrapping</a><i32></code></li> <li><code>impl MulAssign for <a class="struct" href="../../core/num/struct.Wrapping.html" title="struct core::num::Wrapping">Wrapping</a><i64></code></li> <li><code>impl MulAssign for <a class="struct" href="../../core/num/struct.Wrapping.html" title="struct core::num::Wrapping">Wrapping</a><i128></code></li> <li><code>impl MulAssign for usize</code></li> <li><code>impl MulAssign for u8</code></li> <li><code>impl MulAssign for u16</code></li> <li><code>impl MulAssign for u32</code></li> <li><code>impl MulAssign for u64</code></li> <li><code>impl MulAssign for u128</code></li> <li><code>impl MulAssign for isize</code></li> <li><code>impl MulAssign for i8</code></li> <li><code>impl MulAssign for i16</code></li> <li><code>impl MulAssign for i32</code></li> <li><code>impl MulAssign for i64</code></li> <li><code>impl MulAssign for i128</code></li> <li><code>impl MulAssign for f32</code></li> <li><code>impl MulAssign for f64</code></li> </ul><script type="text/javascript" async src="../../implementors/core/ops/trait.MulAssign.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: <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> </div> </div> </aside> <script> window.rootPath = "../../"; 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