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8 lines
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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 `CheckedSub` trait in crate `num_traits`."><meta name="keywords" content="rust, rustlang, rust-lang, CheckedSub"><title>num_traits::ops::checked::CheckedSub - 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 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"><div class="sidebar-menu">☰</div><a href='../../../num_traits/index.html'><div class='logo-container'><img src='../../../rust-logo.png' alt='logo'></div></a><p class='location'>Trait CheckedSub</p><div class="sidebar-elems"><div class="block items"><a class="sidebar-title" href="#required-methods">Required Methods</a><div class="sidebar-links"><a href="#tymethod.checked_sub">checked_sub</a></div><a class="sidebar-title" href="#implementors">Implementors</a></div><p class='location'><a href='../../index.html'>num_traits</a>::<wbr><a href='../index.html'>ops</a>::<wbr><a href='index.html'>checked</a></p><script>window.sidebarCurrent = {name: 'CheckedSub', ty: 'trait', 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"><div class="search-container"><div><select id="crate-search"><option value="All crates">All crates</option></select><input class="search-input" name="search" disabled 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/ops/checked.rs.html#39-43' title='goto source code'>[src]</a></span><span class='in-band'>Trait <a href='../../index.html'>num_traits</a>::<wbr><a href='../index.html'>ops</a>::<wbr><a href='index.html'>checked</a>::<wbr><a class="trait" href=''>CheckedSub</a></span></h1><div class="docblock type-decl hidden-by-usual-hider"><pre class='rust trait'>pub trait CheckedSub: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/arith/trait.Sub.html" title="trait core::ops::arith::Sub">Sub</a><Self, Output = Self> {
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fn <a href='#tymethod.checked_sub' class='fnname'>checked_sub</a>(&self, v: &Self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><Self>;
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}</pre></div><div class='docblock'><p>Performs subtraction that returns <code>None</code> instead of wrapping around on underflow.</p>
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</div>
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<h2 id='required-methods' class='small-section-header'>Required methods<a href='#required-methods' class='anchor'></a></h2><div class='methods'><h3 id='tymethod.checked_sub' class='method'><code id='checked_sub.v'>fn <a href='#tymethod.checked_sub' class='fnname'>checked_sub</a>(&self, v: &Self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><Self></code></h3><div class='docblock'><p>Subtracts two numbers, checking for underflow. If underflow happens,
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<code>None</code> is returned.</p>
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</div></div><span class='loading-content'>Loading content...</span>
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<h2 id='implementors' class='small-section-header'>Implementors<a href='#implementors' class='anchor'></a></h2><div class='item-list' id='implementors-list'><h3 id='impl-CheckedSub' class='impl'><code class='in-band'>impl CheckedSub for i8</code><a href='#impl-CheckedSub' class='anchor'></a><a class='srclink' href='../../../src/num_traits/ops/checked.rs.html#13-18' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.checked_sub' class="method hidden"><code id='checked_sub.v-1'>fn <a href='#method.checked_sub' class='fnname'>checked_sub</a>(&self, v: &i8) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><i8></code><a class='srclink' href='../../../src/num_traits/ops/checked.rs.html#15-17' title='goto source code'>[src]</a></h4></div><h3 id='impl-CheckedSub-1' class='impl'><code class='in-band'>impl CheckedSub for i16</code><a href='#impl-CheckedSub-1' class='anchor'></a><a class='srclink' href='../../../src/num_traits/ops/checked.rs.html#13-18' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.checked_sub-1' class="method hidden"><code id='checked_sub.v-2'>fn <a href='#method.checked_sub-1' class='fnname'>checked_sub</a>(&self, v: &i16) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><i16></code><a class='srclink' href='../../../src/num_traits/ops/checked.rs.html#15-17' title='goto source code'>[src]</a></h4></div><h3 id='impl-CheckedSub-2' class='impl'><code class='in-band'>impl CheckedSub for i32</code><a href='#impl-CheckedSub-2' class='anchor'></a><a class='srclink' href='../../../src/num_traits/ops/checked.rs.html#13-18' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.checked_sub-2' class="method hidden"><code id='checked_sub.v-3'>fn <a href='#method.checked_sub-2' class='fnname'>checked_sub</a>(&self, v: &i32) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><i32></code><a class='srclink' href='../../../src/num_traits/ops/checked.rs.html#15-17' title='goto source code'>[src]</a></h4></div><h3 id='impl-CheckedSub-3' class='impl'><code class='in-band'>impl CheckedSub for i64</code><a href='#impl-CheckedSub-3' class='anchor'></a><a class='srclink' href='../../../src/num_traits/ops/checked.rs.html#13-18' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.checked_sub-3' class="method hidden"><code id='checked_sub.v-4'>fn <a href='#method.checked_sub-3' class='fnname'>checked_sub</a>(&self, v: &i64) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><i64></code><a class='srclink' href='../../../src/num_traits/ops/checked.rs.html#15-17' title='goto source code'>[src]</a></h4></div><h3 id='impl-CheckedSub-4' class='impl'><code class='in-band'>impl CheckedSub for i128</code><a href='#impl-CheckedSub-4' class='anchor'></a><a class='srclink' href='../../../src/num_traits/ops/checked.rs.html#13-18' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.checked_sub-4' class="method hidden"><code id='checked_sub.v-5'>fn <a href='#method.checked_sub-4' class='fnname'>checked_sub</a>(&self, v: &i128) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><i128></code><a class='srclink' href='../../../src/num_traits/ops/checked.rs.html#15-17' title='goto source code'>[src]</a></h4></div><h3 id='impl-CheckedSub-5' class='impl'><code class='in-band'>impl CheckedSub for isize</code><a href='#impl-CheckedSub-5' class='anchor'></a><a class='srclink' href='../../../src/num_traits/ops/checked.rs.html#13-18' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.checked_sub-5' class="method hidden"><code id='checked_sub.v-6'>fn <a href='#method.checked_sub-5' class='fnname'>checked_sub</a>(&self, v: &isize) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><isize></code><a class='srclink' href='../../../src/num_traits/ops/checked.rs.html#15-17' title='goto source code'>[src]</a></h4></div><h3 id='impl-CheckedSub-6' class='impl'><code class='in-band'>impl CheckedSub for u8</code><a href='#impl-CheckedSub-6' class='anchor'></a><a class='srclink' href='../../../src/num_traits/ops/checked.rs.html#13-18' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.checked_sub-6' class="method hidden"><code id='checked_sub.v-7'>fn <a href='#method.checked_sub-6' class='fnname'>checked_sub</a>(&self, v: &u8) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><u8></code><a class='srclink' href='../../../src/num_traits/ops/checked.rs.html#15-17' title='goto source code'>[src]</a></h4></div><h3 id='impl-CheckedSub-7' class='impl'><code class='in-band'>impl CheckedSub for u16</code><a href='#impl-CheckedSub-7' class='anchor'></a><a class='srclink' href='../../../src/num_traits/ops/checked.rs.html#13-18' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.checked_sub-7' class="method hidden"><code id='checked_sub.v-8'>fn <a href='#method.checked_sub-7' class='fnname'>checked_sub</a>(&self, v: &u16) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><u16></code><a class='srclink' href='../../../src/num_traits/ops/checked.rs.html#15-17' title='goto source code'>[src]</a></h4></div><h3 id='impl-CheckedSub-8' class='impl'><code class='in-band'>impl CheckedSub for u32</code><a href='#impl-CheckedSub-8' class='anchor'></a><a class='srclink' href='../../../src/num_traits/ops/checked.rs.html#13-18' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.checked_sub-8' class="method hidden"><code id='checked_sub.v-9'>fn <a href='#method.checked_sub-8' class='fnname'>checked_sub</a>(&self, v: &u32) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><u32></code><a class='srclink' href='../../../src/num_traits/ops/checked.rs.html#15-17' title='goto source code'>[src]</a></h4></div><h3 id='impl-CheckedSub-9' class='impl'><code class='in-band'>impl CheckedSub for u64</code><a href='#impl-CheckedSub-9' class='anchor'></a><a class='srclink' href='../../../src/num_traits/ops/checked.rs.html#13-18' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.checked_sub-9' class="method hidden"><code id='checked_sub.v-10'>fn <a href='#method.checked_sub-9' class='fnname'>checked_sub</a>(&self, v: &u64) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><u64></code><a class='srclink' href='../../../src/num_traits/ops/checked.rs.html#15-17' title='goto source code'>[src]</a></h4></div><h3 id='impl-CheckedSub-10' class='impl'><code class='in-band'>impl CheckedSub for u128</code><a href='#impl-CheckedSub-10' class='anchor'></a><a class='srclink' href='../../../src/num_traits/ops/checked.rs.html#13-18' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.checked_sub-10' class="method hidden"><code id='checked_sub.v-11'>fn <a href='#method.checked_sub-10' class='fnname'>checked_sub</a>(&self, v: &u128) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><u128></code><a class='srclink' href='../../../src/num_traits/ops/checked.rs.html#15-17' title='goto source code'>[src]</a></h4></div><h3 id='impl-CheckedSub-11' class='impl'><code class='in-band'>impl CheckedSub for usize</code><a href='#impl-CheckedSub-11' class='anchor'></a><a class='srclink' href='../../../src/num_traits/ops/checked.rs.html#13-18' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.checked_sub-11' class="method hidden"><code id='checked_sub.v-12'>fn <a href='#method.checked_sub-11' class='fnname'>checked_sub</a>(&self, v: &usize) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><usize></code><a class='srclink' href='../../../src/num_traits/ops/checked.rs.html#15-17' title='goto source code'>[src]</a></h4></div></div><span class='loading-content'>Loading content...</span><script type="text/javascript" src="../../../implementors/num_traits/ops/checked/trait.CheckedSub.js" async></script></section><section id="search" class="content hidden"></section><section 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