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<!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 `cast` fn in crate `num`."><meta name="keywords" content="rust, rustlang, rust-lang, cast"><title>num::traits::cast::cast - 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><noscript><link rel="stylesheet" href="../../../noscript.css"></noscript><link rel="shortcut icon" href="../../../favicon.ico"><style type="text/css">#crate-search{background-image:url("../../../down-arrow.svg");}</style></head><body class="rustdoc fn"><!--[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='../../../num/index.html'><div class='logo-container'><img src='../../../rust-logo.png' alt='logo'></div></a><div class="sidebar-elems"><p class='location'><a href='../../index.html'>num</a>::<wbr><a href='../index.html'>traits</a>::<wbr><a href='index.html'>cast</a></p><script>window.sidebarCurrent = {name: 'cast', ty: 'fn', 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"><div><select id="crate-search"><option value="All crates">All crates</option></select><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"></div><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='out-of-band'><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/num_traits/cast.rs.html#635-637' title='goto source code'>[src]</a></span><span class='in-band'>Function <a href='../../index.html'>num</a>::<wbr><a href='../index.html'>traits</a>::<wbr><a href='index.html'>cast</a>::<wbr><a class="fn" href=''>cast</a></span></h1><pre class='rust fn'>pub fn cast<T, U>(n: T) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><U> <span class="where fmt-newline">where<br> T: <a class="trait" href="../../../num/traits/cast/trait.NumCast.html" title="trait num::traits::cast::NumCast">NumCast</a>,<br> U: <a class="trait" href="../../../num/traits/cast/trait.NumCast.html" title="trait num::traits::cast::NumCast">NumCast</a>, </span></pre><div class='docblock'><p>Cast from one machine scalar to another.</p>
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<h1 id="examples" class="section-header"><a href="#examples">Examples</a></h1>
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<div class="example-wrap"><pre class="rust rust-example-rendered">
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<span class="kw">let</span> <span class="ident">twenty</span>: <span class="ident">f32</span> <span class="op">=</span> <span class="ident">num</span>::<span class="ident">cast</span>(<span class="number">0x14</span>).<span class="ident">unwrap</span>();
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<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">twenty</span>, <span class="number">20f32</span>);</pre></div>
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