<!DOCTYPE html><htmllang="en"><head><metacharset="utf-8"><metaname="viewport"content="width=device-width, initial-scale=1.0"><metaname="generator"content="rustdoc"><metaname="description"content="Generate types for C-style flags with ergonomic APIs."><title>bitflags - Rust</title><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../static.files/SourceSerif4-Regular-46f98efaafac5295.ttf.woff2"><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../static.files/FiraSans-Regular-018c141bf0843ffd.woff2"><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../static.files/FiraSans-Medium-8f9a781e4970d388.woff2"><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../static.files/SourceCodePro-Regular-562dcc5011b6de7d.ttf.woff2"><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../static.files/SourceCodePro-Semibold-d899c5a5c4aeb14a.ttf.woff2"><linkrel="stylesheet"href="../static.files/normalize-76eba96aa4d2e634.css"><linkrel="stylesheet"href="../static.files/rustdoc-5bc39a1768837dd0.css"><metaname="rustdoc-vars"data-root-path="../"data-static-root-path="../static.files/"data-current-crate="bitflags"data-themes=""data-resource-suffix=""data-rustdoc-version="1.77.0 (aedd173a2 2024-03-17)"data-channel="1.77.0"data-search-js="search-dd67cee4cfa65049.js"data-settings-js="settings-4313503d2e1961c2.js"><scriptsrc="../static.files/storage-4c98445ec4002617.js"></script><scriptdefersrc="../crates.js"></script><scriptdefersrc="../static.files/main-48f368f3872407c8.js"></script><noscript><linkrel="stylesheet"href="../static.files/noscript-04d5337699b92874.css"></noscript><linkrel="alternate icon"type="image/png"href="../static.files/favicon-16x16-8b506e7a72182f1c.png"><linkrel="alternate icon"type="image/png"href="../static.files/favicon-32x32-422f7d1d52889060.png"><linkrel="icon"type="image/svg+xml"href="../static.files/favicon-2c020d218678b618.svg"></head><bodyclass="rustdoc mod crate"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><navclass="mobile-topbar"><buttonclass="sidebar-menu-toggle"title="show sidebar"></button></nav><navclass="sidebar"><divclass="sidebar-crate"><h2><ahref="../bitflags/index.html">bitflags</a><spanclass="version">2.5.0</span></h2></div><divclass="sidebar-elems"><ulclass="block">
<main><divclass="width-limiter"><navclass="sub"><formclass="search-form"><span></span><divid="sidebar-button"tabindex="-1"><ahref="../bitflags/all.html"title="show sidebar"></a></div><inputclass="search-input"name="search"aria-label="Run search in the documentation"autocomplete="off"spellcheck="false"placeholder="Click or press ‘S’ to search, ‘?’ for more options…"type="search"><divid="help-button"tabindex="-1"><ahref="../help.html"title="help">?</a></div><divid="settings-menu"tabindex="-1"><ahref="../settings.html"title="settings"><imgwidth="22"height="22"alt="Change settings"src="../static.files/wheel-7b819b6101059cd0.svg"></a></div></form></nav><sectionid="main-content"class="content"><divclass="main-heading"><h1>Crate <aclass="mod"href="#">bitflags</a><buttonid="copy-path"title="Copy item path to clipboard"><imgsrc="../static.files/clipboard-7571035ce49a181d.svg"width="19"height="18"alt="Copy item path"></button></h1><spanclass="out-of-band"><aclass="src"href="../src/bitflags/lib.rs.html#11-923">source</a> · <buttonid="toggle-all-docs"title="collapse all docs">[<span>−</span>]</button></span></div><detailsclass="toggle top-doc"open><summaryclass="hideme"><span>Expand description</span></summary><divclass="docblock"><p>Generate types for C-style flags with ergonomic APIs.</p>
<p>You can also define your own flags type outside of the <ahref="macro.bitflags.html"title="macro bitflags::bitflags"><code>bitflags</code></a> macro and then use it to generate methods.
This can be useful if you need a custom <code>#[derive]</code> attribute for a library that <code>bitflags</code> doesn’t
<p>The <ahref="macro.bitflags.html"title="macro bitflags::bitflags"><code>bitflags</code></a> macro supports attributes on generated flags types within the macro itself, while
<code>impl</code> blocks can be added outside of it:</p>
<p>See the docs for the <ahref="trait.Flags.html"title="trait bitflags::Flags"><code>Flags</code></a> trait for more details on operators and how they behave.</p>
<p>Flags with no bits set should be avoided because they interact strangely with <ahref="trait.Flags.html#method.contains"title="method bitflags::Flags::contains"><code>Flags::contains</code></a>
and <ahref="trait.Flags.html#method.intersects"title="method bitflags::Flags::intersects"><code>Flags::intersects</code></a>. A zero-bit flag is always contained, but is never intersected. The
names of zero-bit flags can be parsed, but are never formatted.</p>
</div></details><h2id="reexports"class="section-header">Re-exports<ahref="#reexports"class="anchor">§</a></h2><ulclass="item-table"><li><divclass="item-name"id="reexport.BitFlags"><code>pub use traits::BitFlags;</code></div><divclass="desc docblock-short"><spanclass="stab deprecated"title="">Deprecated</span></div></li></ul><h2id="modules"class="section-header">Modules<ahref="#modules"class="anchor">§</a></h2><ulclass="item-table"><li><divclass="item-name"><aclass="mod"href="iter/index.html"title="mod bitflags::iter">iter</a></div><divclass="desc docblock-short">Yield the bits of a source flags value in a set of contained flags values.</div></li><li><divclass="item-name"><aclass="mod"href="parser/index.html"title="mod bitflags::parser">parser</a></div><divclass="desc docblock-short">Parsing flags from text.</div></li></ul><h2id="macros"class="section-header">Macros<ahref="#macros"class="anchor">§</a></h2><ulclass="item-table"><li><divclass="item-name"><aclass="macro"href="macro.bitflags.html"title="macro bitflags::bitflags">bitflags</a></div><divclass="desc docblock-short">Generate a flags type.</div></li></ul><h2id="structs"class="section-header">Structs<ahref="#structs"class="anchor">§</a></h2><ulclass="item-table"><li><divclass="item-name"><aclass="struct"href="struct.Flag.html"title="struct bitflags::Flag">Flag</a></div><divclass="desc docblock-short">A defined flags value that may be named or unnamed.</div></li></ul><h2id="traits"class="section-header">Traits<ahref="#traits"class="anchor">§</a></h2><ulclass="item-table"><li><divclass="item-name"><aclass="trait"href="trait.Bits.html"title="trait bitflags::Bits">Bits</a></div><divclass="desc docblock-short">A bits type that can be used as storage for a flags type.</div></li><li><divclass="item-name"><aclass="trait"href="trait.Flags.html"title="trait bitflags::Flags">Flags</a></div><divclass="desc docblock-short">A set of defined flags using a bits type as storage.</div></li></ul></section></div></main></body></html>
