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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="Parse a sub-command into a user-defined enum."><title>Subcommand in clap_builder - Rust</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-46f98efaafac5295.ttf.woff2,FiraSans-Regular-018c141bf0843ffd.woff2,FiraSans-Medium-8f9a781e4970d388.woff2,SourceCodePro-Regular-562dcc5011b6de7d.ttf.woff2,SourceCodePro-Semibold-d899c5a5c4aeb14a.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2" crossorigin href="../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../static.files/normalize-76eba96aa4d2e634.css"><link rel="stylesheet" href="../static.files/rustdoc-dd39b87e5fcfba68.css"><meta name="rustdoc-vars" data-root-path="../" data-static-root-path="../static.files/" data-current-crate="clap_builder" data-themes="" data-resource-suffix="" data-rustdoc-version="1.80.0 (051478957 2024-07-21)" data-channel="1.80.0" data-search-js="search-d52510db62a78183.js" data-settings-js="settings-4313503d2e1961c2.js" ><script src="../static.files/storage-118b08c4c78b968e.js"></script><script defer src="sidebar-items.js"></script><script defer src="../static.files/main-20a3ad099b048cf2.js"></script><noscript><link rel="stylesheet" href="../static.files/noscript-df360f571f6edeae.css"></noscript><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 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" title="show sidebar"></button><a class="logo-container" href="../clap_builder/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_builder/index.html"><img src="https://raw.githubusercontent.com/clap-rs/clap/master/assets/clap.png" alt="logo"></a><h2><a href="../clap_builder/index.html">clap_builder</a><span class="version">4.5.13</span></h2></div><h2 class="location"><a href="#">Subcommand</a></h2><div class="sidebar-elems"><section><h3><a href="#required-methods">Required Methods</a></h3><ul class="block"><li><a href="#tymethod.augment_subcommands">augment_subcommands</a></li><li><a href="#tymethod.augment_subcommands_for_update">augment_subcommands_for_update</a></li><li><a href="#tymethod.has_subcommand">has_subcommand</a></li></ul><h3><a href="#foreign-impls">Implementations on Foreign Types</a></h3><ul class="block"><li><a href="#impl-Subcommand-for-Box%3CT%3E">Box&lt;T&gt;</a></li></ul><h3><a href="#object-safety">Object Safety</a></h3><h3><a href="#implementors">Implementors</a></h3></section><h2><a href="index.html">In crate clap_builder</a></h2></div></nav><div class="sidebar-resizer"></div><main><div class="width-limiter"><rustdoc-search></rustdoc-search><section id="main-content" class="content"><div class="main-heading"><h1>Trait <a href="index.html">clap_builder</a>::<wbr><a class="trait" href="#">Subcommand</a><button id="copy-path" title="Copy item path to clipboard">Copy item path</button></h1><span class="out-of-band"><a class="src" href="../src/clap_builder/derive.rs.html#241-254">source</a> · <button id="toggle-all-docs" title="collapse all docs">[<span>&#x2212;</span>]</button></span></div><pre class="rust item-decl"><code>pub trait Subcommand: <a class="trait" href="trait.FromArgMatches.html" title="trait clap_builder::FromArgMatches">FromArgMatches</a> + <a class="trait" href="https://doc.rust-lang.org/1.80.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> {
deploy: 4a83cfd6f9c58b14a87234162281aad1aef83c3e
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// Required methods
fn <a href="#tymethod.augment_subcommands" class="fn">augment_subcommands</a>(cmd: <a class="struct" href="builder/struct.Command.html" title="struct clap_builder::builder::Command">Command</a>) -&gt; <a class="struct" href="builder/struct.Command.html" title="struct clap_builder::builder::Command">Command</a>;
<span class="item-spacer"></span> fn <a href="#tymethod.augment_subcommands_for_update" class="fn">augment_subcommands_for_update</a>(cmd: <a class="struct" href="builder/struct.Command.html" title="struct clap_builder::builder::Command">Command</a>) -&gt; <a class="struct" href="builder/struct.Command.html" title="struct clap_builder::builder::Command">Command</a>;
deploy: b3bd34a9bbae9c73eb2d66a212d6921bd7499b69
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<span class="item-spacer"></span> fn <a href="#tymethod.has_subcommand" class="fn">has_subcommand</a>(name: &amp;<a class="primitive" href="https://doc.rust-lang.org/1.80.0/std/primitive.str.html">str</a>) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.80.0/std/primitive.bool.html">bool</a>;
deploy: 4a83cfd6f9c58b14a87234162281aad1aef83c3e
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}</code></pre><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>Parse a sub-command into a user-defined enum.</p>
<p>Implementing this trait lets a parent container delegate subcommand behavior to <code>Self</code>.
with:</p>
<ul>
<li><code>#[command(subcommand)] field: SubCmd</code>: Attribute can be used with either struct fields or enum
variants that impl <code>Subcommand</code>.</li>
<li><code>#[command(flatten)] Variant(SubCmd)</code>: Attribute can only be used with enum variants that impl
<code>Subcommand</code>.</li>
</ul>
<p><strong>NOTE:</strong> Deriving requires the <code>derive</code> feature flag</p>
</div></details><h2 id="required-methods" class="section-header">Required Methods<a href="#required-methods" class="anchor">§</a></h2><div class="methods"><details class="toggle method-toggle" open><summary><section id="tymethod.augment_subcommands" class="method"><a class="src rightside" href="../src/clap_builder/derive.rs.html#245">source</a><h4 class="code-header">fn <a href="#tymethod.augment_subcommands" class="fn">augment_subcommands</a>(cmd: <a class="struct" href="builder/struct.Command.html" title="struct clap_builder::builder::Command">Command</a>) -&gt; <a class="struct" href="builder/struct.Command.html" title="struct clap_builder::builder::Command">Command</a></h4></section></summary><div class="docblock"><p>Append to <a href="builder/struct.Command.html" title="struct clap_builder::builder::Command"><code>Command</code></a> so it can instantiate <code>Self</code>.</p>
<p>See also <a href="trait.CommandFactory.html" title="trait clap_builder::CommandFactory"><code>CommandFactory</code></a>.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="tymethod.augment_subcommands_for_update" class="method"><a class="src rightside" href="../src/clap_builder/derive.rs.html#251">source</a><h4 class="code-header">fn <a href="#tymethod.augment_subcommands_for_update" class="fn">augment_subcommands_for_update</a>(cmd: <a class="struct" href="builder/struct.Command.html" title="struct clap_builder::builder::Command">Command</a>) -&gt; <a class="struct" href="builder/struct.Command.html" title="struct clap_builder::builder::Command">Command</a></h4></section></summary><div class="docblock"><p>Append to <a href="builder/struct.Command.html" title="struct clap_builder::builder::Command"><code>Command</code></a> so it can update <code>self</code>.</p>
<p>This is used to implement <code>#[command(flatten)]</code></p>
<p>See also <a href="trait.CommandFactory.html" title="trait clap_builder::CommandFactory"><code>CommandFactory</code></a>.</p>
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</div></details><details class="toggle method-toggle" open><summary><section id="tymethod.has_subcommand" class="method"><a class="src rightside" href="../src/clap_builder/derive.rs.html#253">source</a><h4 class="code-header">fn <a href="#tymethod.has_subcommand" class="fn">has_subcommand</a>(name: &amp;<a class="primitive" href="https://doc.rust-lang.org/1.80.0/std/primitive.str.html">str</a>) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.80.0/std/primitive.bool.html">bool</a></h4></section></summary><div class="docblock"><p>Test whether <code>Self</code> can parse a specific subcommand</p>
</div></details></div><h2 id="object-safety" class="section-header">Object Safety<a href="#object-safety" class="anchor">§</a></h2><div class="object-safety-info">This trait is <b>not</b> <a href="https://doc.rust-lang.org/1.80.0/reference/items/traits.html#object-safety">object safe</a>.</div><h2 id="foreign-impls" class="section-header">Implementations on Foreign Types<a href="#foreign-impls" class="anchor">§</a></h2><details class="toggle implementors-toggle"><summary><section id="impl-Subcommand-for-Box%3CT%3E" class="impl"><a class="src rightside" href="../src/clap_builder/derive.rs.html#346-356">source</a><a href="#impl-Subcommand-for-Box%3CT%3E" class="anchor">§</a><h3 class="code-header">impl&lt;T: <a class="trait" href="trait.Subcommand.html" title="trait clap_builder::Subcommand">Subcommand</a>&gt; <a class="trait" href="trait.Subcommand.html" title="trait clap_builder::Subcommand">Subcommand</a> for <a class="struct" href="https://doc.rust-lang.org/1.80.0/alloc/boxed/struct.Box.html" title="struct alloc::boxed::Box">Box</a>&lt;T&gt;</h3></section></summary><div class="impl-items"><section id="method.augment_subcommands" class="method trait-impl"><a class="src rightside" href="../src/clap_builder/derive.rs.html#347-349">source</a><a href="#method.augment_subcommands" class="anchor">§</a><h4 class="code-header">fn <a href="#tymethod.augment_subcommands" class="fn">augment_subcommands</a>(cmd: <a class="struct" href="builder/struct.Command.html" title="struct clap_builder::builder::Command">Command</a>) -&gt; <a class="struct" href="builder/struct.Command.html" title="struct clap_builder::builder::Command">Command</a></h4></section><section id="method.augment_subcommands_for_update" class="method trait-impl"><a class="src rightside" href="../src/clap_builder/derive.rs.html#350-352">source</a><a href="#method.augment_subcommands_for_update" class="anchor">§</a><h4 class="code-header">fn <a href="#tymethod.augment_subcommands_for_update" class="fn">augment_subcommands_for_update</a>(cmd: <a class="struct" href="builder/struct.Command.html" title="struct clap_builder::builder::Command">Command</a>) -&gt; <a class="struct" href="builder/struct.Command.html" title="struct clap_builder::builder::Command">Command</a></h4></section><section id="method.has_subcommand" class="method trait-impl"><a class="src rightside" href="../src/clap_builder/derive.rs.html#353-355">source</a><a href="#method.has_subcommand" class="anchor">§</a><h4 class="code-header">fn <a href="#tymethod.has_subcommand" class="fn">has_subcommand</a>(name: &amp;<a class="primitive" href="https://doc.rust-lang.org/1.80.0/std/primitive.str.html">str</a>) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.80.0/std/primitive.bool.html">bool</a></h4></section></div></details><h2 id="implementors" class="section-header">Implementors<a href="#implementors" class="anchor">§</a></h2><div id="implementors-list"></div><script src="../trait.impl/clap_builder/derive/trait.Subcommand.js" data-ignore-extern-crates="alloc" async></script></section></div></main></body></html>
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