12 lines
6.4 KiB
HTML
12 lines
6.4 KiB
HTML
<!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 `checked_pow` fn in crate `num_traits`."><meta name="keywords" content="rust, rustlang, rust-lang, checked_pow"><title>num_traits::pow::checked_pow - 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_traits/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_traits</a>::<wbr><a href='index.html'>pow</a></p><script>window.sidebarCurrent = {name: 'checked_pow', 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/pow.rs.html#229-261' title='goto source code'>[src]</a></span><span class='in-band'>Function <a href='../index.html'>num_traits</a>::<wbr><a href='index.html'>pow</a>::<wbr><a class="fn" href=''>checked_pow</a></span></h1><pre class='rust fn'>pub fn checked_pow<T: <a class="trait" href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a> + <a class="trait" href="../../num_traits/identities/trait.One.html" title="trait num_traits::identities::One">One</a> + <a class="trait" href="../../num_traits/ops/checked/trait.CheckedMul.html" title="trait num_traits::ops::checked::CheckedMul">CheckedMul</a>>(<br> base: T, <br> exp: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a><br>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><T></pre><div class='docblock'><p>Raises a value to the power of exp, returning <code>None</code> if an overflow occurred.</p>
|
||
<p>Note that <code>0⁰</code> (<code>checked_pow(0, 0)</code>) returnes <code>Some(1)</code>. Mathematically this is undefined.</p>
|
||
<p>Otherwise same as the <code>pow</code> function.</p>
|
||
<h1 id="example" class="section-header"><a href="#example">Example</a></h1>
|
||
<div class="example-wrap"><pre class="rust rust-example-rendered">
|
||
<span class="kw">use</span> <span class="ident">num_traits</span>::<span class="ident">checked_pow</span>;
|
||
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">checked_pow</span>(<span class="number">2i8</span>, <span class="number">4</span>), <span class="prelude-val">Some</span>(<span class="number">16</span>));
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">checked_pow</span>(<span class="number">7i8</span>, <span class="number">8</span>), <span class="prelude-val">None</span>);
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">checked_pow</span>(<span class="number">7u32</span>, <span class="number">8</span>), <span class="prelude-val">Some</span>(<span class="number">5_764_801</span>));
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">checked_pow</span>(<span class="number">0u32</span>, <span class="number">0</span>), <span class="prelude-val">Some</span>(<span class="number">1</span>)); <span class="comment">// Be aware if this case affect you</span></pre></div>
|
||
</div></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 = "num_traits";</script><script src="../../aliases.js"></script><script src="../../main.js"></script><script defer src="../../search-index.js"></script></body></html> |