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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="Define `Command` line arguments"><title>clap::builder - Rust</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/SourceSerif4-Regular-46f98efaafac5295.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/FiraSans-Regular-018c141bf0843ffd.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/FiraSans-Medium-8f9a781e4970d388.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/SourceCodePro-Regular-562dcc5011b6de7d.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/SourceCodePro-Semibold-d899c5a5c4aeb14a.ttf.woff2"><link rel="stylesheet" href="../../static.files/normalize-76eba96aa4d2e634.css"><link rel="stylesheet" href="../../static.files/rustdoc-5bc39a1768837dd0.css"><meta name="rustdoc-vars" data-root-path="../../" data-static-root-path="../../static.files/" data-current-crate="clap" 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" ><script src="../../static.files/storage-4c98445ec4002617.js"></script><script defer src="../sidebar-items.js"></script><script defer src="../../static.files/main-48f368f3872407c8.js"></script><noscript><link rel="stylesheet" href="../../static.files/noscript-04d5337699b92874.css"></noscript><link rel="alternate icon" type="image/png" href="../../static.files/favicon-16x16-8b506e7a72182f1c.png"><link rel="alternate icon" type="image/png" href="../../static.files/favicon-32x32-422f7d1d52889060.png"><link rel="icon" type="image/svg+xml" href="../../static.files/favicon-2c020d218678b618.svg"></head><body class="rustdoc mod"><!--[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" title="show sidebar"></button><a class="logo-container" href="../../clap/index.html"><img src="https://raw.githubusercontent.com/clap-rs/clap/master/assets/clap.png" alt=""></a></nav><nav class="sidebar"><div class="sidebar-crate"><a class="logo-container" href="../../clap/index.html"><img src="https://raw.githubusercontent.com/clap-rs/clap/master/assets/clap.png" alt="logo"></a><h2><a href="../../clap/index.html">clap</a><span class="version">4.5.2</span></h2></div><h2 class="location"><a href="#">Module builder</a></h2><div class="sidebar-elems"><section><ul class="block"><li><a href="#modules">Modules</a></li><li><a href="#structs">Structs</a></li><li><a href="#enums">Enums</a></li><li><a href="#traits">Traits</a></li></ul></section><h2><a href="../index.html">In crate clap</a></h2></div></nav><div class="sidebar-resizer"></div>
<main><div class="width-limiter"><nav class="sub"><form class="search-form"><span></span><div id="sidebar-button" tabindex="-1"><a href="../../clap/all.html" title="show sidebar"></a></div><input class="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"><div id="help-button" tabindex="-1"><a href="../../help.html" title="help">?</a></div><div id="settings-menu" tabindex="-1"><a href="../../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../../static.files/wheel-7b819b6101059cd0.svg"></a></div></form></nav><section id="main-content" class="content"><div class="main-heading"><h1>Module <a href="../index.html">clap</a>::<wbr><a class="mod" href="#">builder</a><button id="copy-path" title="Copy item path to clipboard"><img src="../../static.files/clipboard-7571035ce49a181d.svg" width="19" height="18" alt="Copy item path"></button></h1><span class="out-of-band"><a class="src" href="../../src/clap_builder/lib.rs.html#57">source</a> · <button id="toggle-all-docs" title="collapse all docs">[<span>&#x2212;</span>]</button></span></div><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>Define <a href="../struct.Command.html" title="struct clap::Command"><code>Command</code></a> line <a href="../struct.Arg.html" title="struct clap::Arg">arguments</a></p>
</div></details><h2 id="modules" class="section-header">Modules<a href="#modules" class="anchor">§</a></h2><ul class="item-table"><li><div class="item-name"><a class="mod" href="styling/index.html" title="mod clap::builder::styling">styling</a></div><div class="desc docblock-short">Terminal <a href="struct.Styles.html" title="struct clap::builder::Styles"><code>Styles</code></a> for help and error output</div></li></ul><h2 id="structs" class="section-header">Structs<a href="#structs" class="anchor">§</a></h2><ul class="item-table"><li><div class="item-name"><a class="struct" href="struct.Arg.html" title="struct clap::builder::Arg">Arg</a></div><div class="desc docblock-short">The abstract representation of a command line argument. Used to set all the options and
relationships that define a valid argument for the program.</div></li><li><div class="item-name"><a class="struct" href="struct.ArgGroup.html" title="struct clap::builder::ArgGroup">ArgGroup</a></div><div class="desc docblock-short">Family of related <a href="../struct.Arg.html" title="struct clap::Arg">arguments</a>.</div></li><li><div class="item-name"><a class="struct" href="struct.BoolValueParser.html" title="struct clap::builder::BoolValueParser">BoolValueParser</a></div><div class="desc docblock-short">Implementation for <a href="struct.ValueParser.html#method.bool" title="associated function clap::builder::ValueParser::bool"><code>ValueParser::bool</code></a></div></li><li><div class="item-name"><a class="struct" href="struct.BoolishValueParser.html" title="struct clap::builder::BoolishValueParser">BoolishValueParser</a></div><div class="desc docblock-short">Parse bool-like string values, everything else is <code>true</code></div></li><li><div class="item-name"><a class="struct" href="struct.Command.html" title="struct clap::builder::Command">Command</a></div><div class="desc docblock-short">Build a command-line interface.</div></li><li><div class="item-name"><a class="struct" href="struct.EnumValueParser.html" title="struct clap::builder::EnumValueParser">EnumValueParser</a></div><div class="desc docblock-short">Parse an <a href="../trait.ValueEnum.html" title="trait clap::ValueEnum"><code>ValueEnum</code></a> value.</div></li><li><div class="item-name"><a class="struct" href="struct.FalseyValueParser.html" title="struct clap::builder::FalseyValueParser">FalseyValueParser</a></div><div class="desc docblock-short">Parse false-like string values, everything else is <code>true</code></div></li><li><div class="item-name"><a class="struct" href="struct.MapValueParser.html" title="struct clap::builder::MapValueParser">MapValueParser</a></div><div class="desc docblock-short">Adapt a <code>TypedValueParser</code> from one value to another</div></li><li><div class="item-name"><a class="struct" href="struct.NonEmptyStringValueParser.html" title="struct clap::builder::NonEmptyStringValueParser">NonEmptyStringValueParser</a></div><div class="desc docblock-short">Parse non-empty string values</div></li><li><div class="item-name"><a class="struct" href="struct.OsStr.html" title="struct clap::builder::OsStr">OsStr</a></div><div class="desc docblock-short">A UTF-8-encoded fixed string</div></li><li><div class="item-name"><a class="struct" href="struct.OsStringValueParser.html" title="struct clap::builder::OsStringValueParser">OsStringValueParser</a></div><div class="desc docblock-short">Implementation for <a href="struct.ValueParser.html#method.os_string" title="associated function clap::builder::ValueParser::os_string"><code>ValueParser::os_string</code></a></div></li><li><div class="item-name"><a class="struct" href="struct.PathBufValueParser.html" title="struct clap::builder::PathBufValueParser">PathBufValueParser</a></div><div class="desc docblock-short">Implementation for <a href="struct.ValueParser.html#method.path_buf" title="associated function clap::builder::ValueParser::path_buf"><code>ValueParser::path_buf</code></a></div></li><li><div class="item-name"><a class="struct" href="struct.PossibleValue.html" title="struct clap::builder::PossibleValue">PossibleValue</a></div><div class="desc docblock-short">A possible value of an argument.</div></li><li><div class="item-name"><a class="struct" href="struct.PossibleValuesParser.html" title="struct clap::builder::PossibleValuesParser">PossibleValuesParser</a></div><div class="desc docblock-short">Verify the value is from an enumerated set of <a href="struct.PossibleValue.html" title="struct clap::builder::PossibleValue"><code>PossibleValue</code></a>.</div></li><li><div class="item-name"><a class="struct" href="struct.RangedI64ValueParser.html" title="struct clap::builder::RangedI64ValueParser">RangedI64ValueParser</a></div><div class="desc docblock-short">Parse number that fall within a range of values</div></li><li><div class="item-name"><a class="struct" href="struct.RangedU64ValueParser.html" title="struct clap::builder::RangedU64ValueParser">RangedU64ValueParser</a></div><div class="desc docblock-short">Parse number that fall within a range of values</div></li><li><div class="item-name"><a class="struct" href="struct.Str.html" title="struct clap::builder::Str">Str</a></div><div class="desc docblock-short">A UTF-8-encoded fixed string</div></li><li><div class="item-name"><a class="struct" href="struct.StringValueParser.html" title="struct clap::builder::StringValueParser">StringValueParser</a></div><div class="desc docblock-short">Implementation for <a href="struct.ValueParser.html#method.string" title="associated function clap::builder::ValueParser::string"><code>ValueParser::string</code></a></div></li><li><div class="item-name"><a class="struct" href="struct.StyledStr.html" title="struct clap::builder::StyledStr">StyledStr</a></div><div class="desc docblock-short">Terminal-styling container</div></li><li><div class="item-name"><a class="struct" href="struct.Styles.html" title="struct clap::builder::Styles">Styles</a></div><div class="desc docblock-short">Terminal styling definitions</div></li><li><div class="item-name"><a class="struct" href="struct.TryMapValueParser.html" title="struct clap::builder::TryMapValueParser">TryMapValueParser</a></div><div class="desc docblock-short">Adapt a <code>TypedValueParser</code> from one value to another</div></li><li><div class="item-name"><a class="struct" href="struct.UnknownArgumentValueParser.html" title="struct clap::builder::UnknownArgumentValueParser">UnknownArgumentValueParser</a></div><div class="desc docblock-short">When encountered, report <a href="../error/enum.ErrorKind.html#variant.UnknownArgument" title="variant clap::error::ErrorKind::UnknownArgument">ErrorKind::UnknownArgument</a></div></li><li><div class="item-name"><a class="struct" href="struct.ValueParser.html" title="struct clap::builder::ValueParser">ValueParser</a></div><div class="desc docblock-short">Parse/validate argument values</div></li><li><div class="item-name"><a class="struct" href="struct.ValueRange.html" title="struct clap::builder::ValueRange">ValueRange</a></div><div class="desc docblock-short">Values per occurrence for an argument</div></li></ul><h2 id="enums" class="section-header">Enums<a href="#enums" class="anchor">§</a></h2><ul class="item-table"><li><div class="item-name"><a class="enum" href="enum.ArgAction.html" title="enum clap::builder::ArgAction">ArgAction</a></div><div class="desc docblock-short">Behavior of arguments when they are encountered while parsing</div></li><li><div class="item-name"><a class="enum" href="enum.ArgPredicate.html" title="enum clap::builder::ArgPredicate">ArgPredicate</a></div><div class="desc docblock-short">Operations to perform on argument values</div></li><li><div class="item-name"><a class="enum" href="enum.Resettable.html" title="enum clap::builder::Resettable">Resettable</a></div><div class="desc docblock-short">Clearable builder value</div></li><li><div class="item-name"><a class="enum" href="enum.ValueHint.html" title="enum clap::builder::ValueHint">ValueHint</a></div><div class="desc docblock-short">Provide shell with hint on how to complete an argument.</div></li></ul><h2 id="traits" class="section-header">Traits<a href="#traits" class="anchor">§</a></h2><ul class="item-table"><li><div class="item-name"><a class="trait" href="trait.IntoResettable.html" title="trait clap::builder::IntoResettable">IntoResettable</a></div><div class="desc docblock-short">Convert to the intended resettable type</div></li><li><div class="item-name"><a class="trait" href="trait.TypedValueParser.html" title="trait clap::builder::TypedValueParser">TypedValueParser</a></div><div class="desc docblock-short">Parse/validate argument values</div></li><li><div class="item-name"><a class="trait" href="trait.ValueParserFactory.html" title="trait clap::builder::ValueParserFactory">ValueParserFactory</a></div><div class="desc docblock-short">Register a type with <a href="../macro.value_parser.html" title="macro clap::value_parser">value_parser!</a></div></li></ul></section></div></main></body></html>