| <!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="Performs subtraction that returns `None` instead of wrapping around on underflow."><meta name="keywords" content="rust, rustlang, rust-lang, CheckedSub"><title>CheckedSub in num::traits::ops::checked - Rust</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../../SourceSerif4-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../../FiraSans-Regular.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../../FiraSans-Medium.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../../SourceCodePro-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../../SourceSerif4-Bold.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../../SourceCodePro-Semibold.ttf.woff2"><link rel="stylesheet" href="../../../../normalize.css"><link rel="stylesheet" href="../../../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" href="../../../../ayu.css" disabled><link rel="stylesheet" href="../../../../dark.css" disabled><link rel="stylesheet" href="../../../../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../../../../storage.js"></script><script defer src="sidebar-items.js"></script><script defer src="../../../../main.js"></script><noscript><link rel="stylesheet" href="../../../../noscript.css"></noscript><link rel="alternate icon" type="image/png" href="../../../../favicon-16x16.png"><link rel="alternate icon" type="image/png" href="../../../../favicon-32x32.png"><link rel="icon" type="image/svg+xml" href="../../../../favicon.svg"></head><body class="rustdoc trait"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="mobile-topbar"><button class="sidebar-menu-toggle">☰</button><a class="sidebar-logo" href="../../../../num/index.html"><div class="logo-container"><img class="rust-logo" src="../../../../rust-logo.svg" alt="logo"></div></a><h2></h2></nav><nav class="sidebar"><a class="sidebar-logo" href="../../../../num/index.html"><div class="logo-container"><img class="rust-logo" src="../../../../rust-logo.svg" alt="logo"></div></a><h2 class="location"><a href="#">CheckedSub</a></h2><div class="sidebar-elems"><section><h3><a href="#required-methods">Required Methods</a></h3><ul class="block"><li><a href="#tymethod.checked_sub">checked_sub</a></li></ul><h3><a href="#foreign-impls">Implementations on Foreign Types</a></h3><ul class="block"><li><a href="#impl-CheckedSub-for-i128">i128</a></li><li><a href="#impl-CheckedSub-for-i16">i16</a></li><li><a href="#impl-CheckedSub-for-i32">i32</a></li><li><a href="#impl-CheckedSub-for-i64">i64</a></li><li><a href="#impl-CheckedSub-for-i8">i8</a></li><li><a href="#impl-CheckedSub-for-isize">isize</a></li><li><a href="#impl-CheckedSub-for-u128">u128</a></li><li><a href="#impl-CheckedSub-for-u16">u16</a></li><li><a href="#impl-CheckedSub-for-u32">u32</a></li><li><a href="#impl-CheckedSub-for-u64">u64</a></li><li><a href="#impl-CheckedSub-for-u8">u8</a></li><li><a href="#impl-CheckedSub-for-usize">usize</a></li></ul><h3><a href="#implementors">Implementors</a></h3></section><h2><a href="index.html">In num::traits::ops::checked</a></h2></div></nav><main><div class="width-limiter"><nav class="sub"><form class="search-form"><div class="search-container"><span></span><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><div id="help-button" title="help" tabindex="-1"><a href="../../../../help.html">?</a></div><div id="settings-menu" tabindex="-1"><a href="../../../../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../../../../wheel.svg"></a></div></div></form></nav><section id="main-content" class="content"><div class="main-heading"><h1 class="fqn">Trait <a href="../../../index.html">num</a>::<wbr><a href="../../index.html">traits</a>::<wbr><a href="../index.html">ops</a>::<wbr><a href="index.html">checked</a>::<wbr><a class="trait" href="#">CheckedSub</a><button id="copy-path" onclick="copy_path(this)" title="Copy item path to clipboard"><img src="../../../../clipboard.svg" width="19" height="18" alt="Copy item path"></button></h1><span class="out-of-band"><a class="srclink" href="../../../../src/num_traits/ops/checked.rs.html#39">source</a> · <a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class="inner">−</span>]</a></span></div><div class="item-decl"><pre class="rust trait"><code>pub trait CheckedSub: Sub<Self, Output = Self> { |
| fn <a href="#tymethod.checked_sub" class="fnname">checked_sub</a>(&self, v: &Self) -> Option<Self>; |
| }</code></pre></div><details class="rustdoc-toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>Performs subtraction that returns <code>None</code> instead of wrapping around on underflow.</p> |
| </div></details><h2 id="required-methods" class="small-section-header">Required Methods<a href="#required-methods" class="anchor"></a></h2><div class="methods"><details class="rustdoc-toggle method-toggle" open><summary><section id="tymethod.checked_sub" class="method has-srclink"><a class="srclink rightside" href="../../../../src/num_traits/ops/checked.rs.html#42">source</a><h4 class="code-header">fn <a href="#tymethod.checked_sub" class="fnname">checked_sub</a>(&self, v: &Self) -> Option<Self></h4></section></summary><div class="docblock"><p>Subtracts two numbers, checking for underflow. If underflow happens, |
| <code>None</code> is returned.</p> |
| </div></details></div><h2 id="foreign-impls" class="small-section-header">Implementations on Foreign Types<a href="#foreign-impls" class="anchor"></a></h2><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-CheckedSub-for-i128" class="impl has-srclink"><a class="srclink rightside" href="../../../../src/num_traits/ops/checked.rs.html#59">source</a><a href="#impl-CheckedSub-for-i128" class="anchor"></a><h3 class="code-header">impl <a class="trait" href="../../../trait.CheckedSub.html" title="trait num::CheckedSub">CheckedSub</a> for i128</h3></section></summary><div class="impl-items"><section id="method.checked_sub" class="method trait-impl has-srclink"><a class="srclink rightside" href="../../../../src/num_traits/ops/checked.rs.html#59">source</a><a href="#method.checked_sub" class="anchor"></a><h4 class="code-header">fn <a href="#tymethod.checked_sub" class="fnname">checked_sub</a>(&self, v: &i128) -> Option<i128></h4></section></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-CheckedSub-for-u128" class="impl has-srclink"><a class="srclink rightside" href="../../../../src/num_traits/ops/checked.rs.html#51">source</a><a href="#impl-CheckedSub-for-u128" class="anchor"></a><h3 class="code-header">impl <a class="trait" href="../../../trait.CheckedSub.html" title="trait num::CheckedSub">CheckedSub</a> for u128</h3></section></summary><div class="impl-items"><section id="method.checked_sub-1" class="method trait-impl has-srclink"><a class="srclink rightside" href="../../../../src/num_traits/ops/checked.rs.html#51">source</a><a href="#method.checked_sub-1" class="anchor"></a><h4 class="code-header">fn <a href="#tymethod.checked_sub" class="fnname">checked_sub</a>(&self, v: &u128) -> Option<u128></h4></section></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-CheckedSub-for-u64" class="impl has-srclink"><a class="srclink rightside" href="../../../../src/num_traits/ops/checked.rs.html#48">source</a><a href="#impl-CheckedSub-for-u64" class="anchor"></a><h3 class="code-header">impl <a class="trait" href="../../../trait.CheckedSub.html" title="trait num::CheckedSub">CheckedSub</a> for u64</h3></section></summary><div class="impl-items"><section id="method.checked_sub-2" class="method trait-impl has-srclink"><a class="srclink rightside" href="../../../../src/num_traits/ops/checked.rs.html#48">source</a><a href="#method.checked_sub-2" class="anchor"></a><h4 class="code-header">fn <a href="#tymethod.checked_sub" class="fnname">checked_sub</a>(&self, v: &u64) -> Option<u64></h4></section></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-CheckedSub-for-u16" class="impl has-srclink"><a class="srclink rightside" href="../../../../src/num_traits/ops/checked.rs.html#46">source</a><a href="#impl-CheckedSub-for-u16" class="anchor"></a><h3 class="code-header">impl <a class="trait" href="../../../trait.CheckedSub.html" title="trait num::CheckedSub">CheckedSub</a> for u16</h3></section></summary><div class="impl-items"><section id="method.checked_sub-3" class="method trait-impl has-srclink"><a class="srclink rightside" href="../../../../src/num_traits/ops/checked.rs.html#46">source</a><a href="#method.checked_sub-3" class="anchor"></a><h4 class="code-header">fn <a href="#tymethod.checked_sub" class="fnname">checked_sub</a>(&self, v: &u16) -> Option<u16></h4></section></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-CheckedSub-for-i16" class="impl has-srclink"><a class="srclink rightside" href="../../../../src/num_traits/ops/checked.rs.html#54">source</a><a href="#impl-CheckedSub-for-i16" class="anchor"></a><h3 class="code-header">impl <a class="trait" href="../../../trait.CheckedSub.html" title="trait num::CheckedSub">CheckedSub</a> for i16</h3></section></summary><div class="impl-items"><section id="method.checked_sub-4" class="method trait-impl has-srclink"><a class="srclink rightside" href="../../../../src/num_traits/ops/checked.rs.html#54">source</a><a href="#method.checked_sub-4" class="anchor"></a><h4 class="code-header">fn <a href="#tymethod.checked_sub" class="fnname">checked_sub</a>(&self, v: &i16) -> Option<i16></h4></section></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-CheckedSub-for-usize" class="impl has-srclink"><a class="srclink rightside" href="../../../../src/num_traits/ops/checked.rs.html#49">source</a><a href="#impl-CheckedSub-for-usize" class="anchor"></a><h3 class="code-header">impl <a class="trait" href="../../../trait.CheckedSub.html" title="trait num::CheckedSub">CheckedSub</a> for usize</h3></section></summary><div class="impl-items"><section id="method.checked_sub-5" class="method trait-impl has-srclink"><a class="srclink rightside" href="../../../../src/num_traits/ops/checked.rs.html#49">source</a><a href="#method.checked_sub-5" class="anchor"></a><h4 class="code-header">fn <a href="#tymethod.checked_sub" class="fnname">checked_sub</a>(&self, v: &usize) -> Option<usize></h4></section></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-CheckedSub-for-i64" class="impl has-srclink"><a class="srclink rightside" href="../../../../src/num_traits/ops/checked.rs.html#56">source</a><a href="#impl-CheckedSub-for-i64" class="anchor"></a><h3 class="code-header">impl <a class="trait" href="../../../trait.CheckedSub.html" title="trait num::CheckedSub">CheckedSub</a> for i64</h3></section></summary><div class="impl-items"><section id="method.checked_sub-6" class="method trait-impl has-srclink"><a class="srclink rightside" href="../../../../src/num_traits/ops/checked.rs.html#56">source</a><a href="#method.checked_sub-6" class="anchor"></a><h4 class="code-header">fn <a href="#tymethod.checked_sub" class="fnname">checked_sub</a>(&self, v: &i64) -> Option<i64></h4></section></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-CheckedSub-for-i8" class="impl has-srclink"><a class="srclink rightside" href="../../../../src/num_traits/ops/checked.rs.html#53">source</a><a href="#impl-CheckedSub-for-i8" class="anchor"></a><h3 class="code-header">impl <a class="trait" href="../../../trait.CheckedSub.html" title="trait num::CheckedSub">CheckedSub</a> for i8</h3></section></summary><div class="impl-items"><section id="method.checked_sub-7" class="method trait-impl has-srclink"><a class="srclink rightside" href="../../../../src/num_traits/ops/checked.rs.html#53">source</a><a href="#method.checked_sub-7" class="anchor"></a><h4 class="code-header">fn <a href="#tymethod.checked_sub" class="fnname">checked_sub</a>(&self, v: &i8) -> Option<i8></h4></section></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-CheckedSub-for-u32" class="impl has-srclink"><a class="srclink rightside" href="../../../../src/num_traits/ops/checked.rs.html#47">source</a><a href="#impl-CheckedSub-for-u32" class="anchor"></a><h3 class="code-header">impl <a class="trait" href="../../../trait.CheckedSub.html" title="trait num::CheckedSub">CheckedSub</a> for u32</h3></section></summary><div class="impl-items"><section id="method.checked_sub-8" class="method trait-impl has-srclink"><a class="srclink rightside" href="../../../../src/num_traits/ops/checked.rs.html#47">source</a><a href="#method.checked_sub-8" class="anchor"></a><h4 class="code-header">fn <a href="#tymethod.checked_sub" class="fnname">checked_sub</a>(&self, v: &u32) -> Option<u32></h4></section></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-CheckedSub-for-u8" class="impl has-srclink"><a class="srclink rightside" href="../../../../src/num_traits/ops/checked.rs.html#45">source</a><a href="#impl-CheckedSub-for-u8" class="anchor"></a><h3 class="code-header">impl <a class="trait" href="../../../trait.CheckedSub.html" title="trait num::CheckedSub">CheckedSub</a> for u8</h3></section></summary><div class="impl-items"><section id="method.checked_sub-9" class="method trait-impl has-srclink"><a class="srclink rightside" href="../../../../src/num_traits/ops/checked.rs.html#45">source</a><a href="#method.checked_sub-9" class="anchor"></a><h4 class="code-header">fn <a href="#tymethod.checked_sub" class="fnname">checked_sub</a>(&self, v: &u8) -> Option<u8></h4></section></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-CheckedSub-for-i32" class="impl has-srclink"><a class="srclink rightside" href="../../../../src/num_traits/ops/checked.rs.html#55">source</a><a href="#impl-CheckedSub-for-i32" class="anchor"></a><h3 class="code-header">impl <a class="trait" href="../../../trait.CheckedSub.html" title="trait num::CheckedSub">CheckedSub</a> for i32</h3></section></summary><div class="impl-items"><section id="method.checked_sub-10" class="method trait-impl has-srclink"><a class="srclink rightside" href="../../../../src/num_traits/ops/checked.rs.html#55">source</a><a href="#method.checked_sub-10" class="anchor"></a><h4 class="code-header">fn <a href="#tymethod.checked_sub" class="fnname">checked_sub</a>(&self, v: &i32) -> Option<i32></h4></section></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-CheckedSub-for-isize" class="impl has-srclink"><a class="srclink rightside" href="../../../../src/num_traits/ops/checked.rs.html#57">source</a><a href="#impl-CheckedSub-for-isize" class="anchor"></a><h3 class="code-header">impl <a class="trait" href="../../../trait.CheckedSub.html" title="trait num::CheckedSub">CheckedSub</a> for isize</h3></section></summary><div class="impl-items"><section id="method.checked_sub-11" class="method trait-impl has-srclink"><a class="srclink rightside" href="../../../../src/num_traits/ops/checked.rs.html#57">source</a><a href="#method.checked_sub-11" class="anchor"></a><h4 class="code-header">fn <a href="#tymethod.checked_sub" class="fnname">checked_sub</a>(&self, v: &isize) -> Option<isize></h4></section></div></details><h2 id="implementors" class="small-section-header">Implementors<a href="#implementors" class="anchor"></a></h2><div id="implementors-list"><section id="impl-CheckedSub-for-BigInt" class="impl has-srclink"><a class="srclink rightside" href="../../../../src/num_bigint/bigint/subtraction.rs.html#295">source</a><a href="#impl-CheckedSub-for-BigInt" class="anchor"></a><h3 class="code-header">impl <a class="trait" href="../../../trait.CheckedSub.html" title="trait num::CheckedSub">CheckedSub</a> for <a class="struct" href="../../../struct.BigInt.html" title="struct num::BigInt">BigInt</a></h3></section><section id="impl-CheckedSub-for-BigUint" class="impl has-srclink"><a class="srclink rightside" href="../../../../src/num_bigint/biguint/subtraction.rs.html#303">source</a><a href="#impl-CheckedSub-for-BigUint" class="anchor"></a><h3 class="code-header">impl <a class="trait" href="../../../trait.CheckedSub.html" title="trait num::CheckedSub">CheckedSub</a> for <a class="struct" href="../../../struct.BigUint.html" title="struct num::BigUint">BigUint</a></h3></section><section id="impl-CheckedSub-for-Ratio%3CT%3E" class="impl has-srclink"><a class="srclink rightside" href="../../../../src/num_rational/lib.rs.html#855">source</a><a href="#impl-CheckedSub-for-Ratio%3CT%3E" class="anchor"></a><h3 class="code-header">impl<T> <a class="trait" href="../../../trait.CheckedSub.html" title="trait num::CheckedSub">CheckedSub</a> for <a class="struct" href="../../../rational/struct.Ratio.html" title="struct num::rational::Ratio">Ratio</a><T><span class="where fmt-newline">where<br> T: Clone + <a class="trait" href="../../../trait.Integer.html" title="trait num::Integer">Integer</a> + <a class="trait" href="../../../trait.CheckedMul.html" title="trait num::CheckedMul">CheckedMul</a> + <a class="trait" href="../../../trait.CheckedSub.html" title="trait num::CheckedSub">CheckedSub</a>,</span></h3></section></div><script src="../../../../implementors/num_traits/ops/checked/trait.CheckedSub.js" data-ignore-extern-crates="num_bigint,core,num_rational" async></script></section></div></main><div id="rustdoc-vars" data-root-path="../../../../" data-current-crate="num" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |
