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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 `StructOpt` trait in crate `structopt`."><meta name="keywords" content="rust, rustlang, rust-lang, StructOpt"><title>structopt::StructOpt - 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='../structopt/index.html'><div class='logo-container'><img src='../rust-logo.png' alt='logo'></div></a><p class='location'>Trait StructOpt</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.clap">clap</a><a href="#tymethod.from_clap">from_clap</a></div><a class="sidebar-title" href="#provided-methods">Provided Methods</a><div class="sidebar-links"><a href="#method.from_args">from_args</a><a href="#method.from_iter">from_iter</a><a href="#method.from_iter_safe">from_iter_safe</a></div><a class="sidebar-title" href="#implementors">Implementors</a></div><p class='location'><a href='index.html'>structopt</a></p><script>window.sidebarCurrent = {name: 'StructOpt', 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 js-only"><div class="search-container"><div><select id="crate-search"><option value="All crates">All crates</option></select><input class="search-input" name="search" 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/structopt/lib.rs.html#516-557' title='goto source code'>[src]</a></span><span class='in-band'>Trait <a href='index.html'>structopt</a>::<wbr><a class="trait" href=''>StructOpt</a></span></h1><div class="docblock type-decl hidden-by-usual-hider"><pre class='rust trait'>pub trait StructOpt {
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fn <a href='#tymethod.clap' class='fnname'>clap</a><'a, 'b>() -> <a class="struct" href="../structopt/clap/struct.App.html" title="struct structopt::clap::App">App</a><'a, 'b>;
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<div class='item-spacer'></div> fn <a href='#tymethod.from_clap' class='fnname'>from_clap</a>(_: &<a class="struct" href="../structopt/clap/struct.ArgMatches.html" title="struct structopt::clap::ArgMatches">ArgMatches</a>) -> Self;
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fn <a href='#method.from_args' class='fnname'>from_args</a>() -> Self<br> <span class="where">where<br> Self: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a></span>,
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{ ... }
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<div class='item-spacer'></div> fn <a href='#method.from_iter' class='fnname'>from_iter</a><I>(iter: I) -> Self<br> <span class="where">where<br> Self: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,<br> I: <a class="trait" href="https://doc.rust-lang.org/nightly/core/iter/traits/collect/trait.IntoIterator.html" title="trait core::iter::traits::collect::IntoIterator">IntoIterator</a>,<br> I::<a class="type" href="https://doc.rust-lang.org/nightly/core/iter/traits/collect/trait.IntoIterator.html#associatedtype.Item" title="type core::iter::traits::collect::IntoIterator::Item">Item</a>: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a><<a class="struct" href="https://doc.rust-lang.org/nightly/std/ffi/os_str/struct.OsString.html" title="struct std::ffi::os_str::OsString">OsString</a>> + <a class="trait" href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a></span>,
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{ ... }
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<div class='item-spacer'></div> fn <a href='#method.from_iter_safe' class='fnname'>from_iter_safe</a><I>(iter: I) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><Self, <a class="struct" href="../structopt/clap/struct.Error.html" title="struct structopt::clap::Error">Error</a>><br> <span class="where">where<br> Self: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,<br> I: <a class="trait" href="https://doc.rust-lang.org/nightly/core/iter/traits/collect/trait.IntoIterator.html" title="trait core::iter::traits::collect::IntoIterator">IntoIterator</a>,<br> I::<a class="type" href="https://doc.rust-lang.org/nightly/core/iter/traits/collect/trait.IntoIterator.html#associatedtype.Item" title="type core::iter::traits::collect::IntoIterator::Item">Item</a>: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a><<a class="struct" href="https://doc.rust-lang.org/nightly/std/ffi/os_str/struct.OsString.html" title="struct std::ffi::os_str::OsString">OsString</a>> + <a class="trait" href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a></span>,
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{ ... }
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}</pre></div><div class='docblock'><p>A struct that is converted from command line arguments.</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.clap' class='method'><code id='clap.v'>fn <a href='#tymethod.clap' class='fnname'>clap</a><'a, 'b>() -> <a class="struct" href="../structopt/clap/struct.App.html" title="struct structopt::clap::App">App</a><'a, 'b></code></h3><div class='docblock'><p>Returns the corresponding <code>clap::App</code>.</p>
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</div><h3 id='tymethod.from_clap' class='method'><code id='from_clap.v'>fn <a href='#tymethod.from_clap' class='fnname'>from_clap</a>(_: &<a class="struct" href="../structopt/clap/struct.ArgMatches.html" title="struct structopt::clap::ArgMatches">ArgMatches</a>) -> Self</code></h3><div class='docblock'><p>Creates the struct from <code>clap::ArgMatches</code>. It cannot fail
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with a parameter generated by <code>clap</code> by construction.</p>
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</div></div><span class='loading-content'>Loading content...</span>
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<h2 id='provided-methods' class='small-section-header'>Provided methods<a href='#provided-methods' class='anchor'></a></h2><div class='methods'><h3 id='method.from_args' class='method'><code id='from_args.v'>fn <a href='#method.from_args' class='fnname'>from_args</a>() -> Self <span class="where fmt-newline">where<br> Self: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>, </span></code></h3><div class='docblock'><p>Gets the struct from the command line arguments. Print the
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error message and quit the program in case of failure.</p>
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</div><h3 id='method.from_iter' class='method'><code id='from_iter.v'>fn <a href='#method.from_iter' class='fnname'>from_iter</a><I>(iter: I) -> Self <span class="where fmt-newline">where<br> Self: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,<br> I: <a class="trait" href="https://doc.rust-lang.org/nightly/core/iter/traits/collect/trait.IntoIterator.html" title="trait core::iter::traits::collect::IntoIterator">IntoIterator</a>,<br> I::<a class="type" href="https://doc.rust-lang.org/nightly/core/iter/traits/collect/trait.IntoIterator.html#associatedtype.Item" title="type core::iter::traits::collect::IntoIterator::Item">Item</a>: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a><<a class="struct" href="https://doc.rust-lang.org/nightly/std/ffi/os_str/struct.OsString.html" title="struct std::ffi::os_str::OsString">OsString</a>> + <a class="trait" href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a>, </span></code></h3><div class='docblock'><p>Gets the struct from any iterator such as a <code>Vec</code> of your making.
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Print the error message and quit the program in case of failure.</p>
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</div><h3 id='method.from_iter_safe' class='method'><code id='from_iter_safe.v'>fn <a href='#method.from_iter_safe' class='fnname'>from_iter_safe</a><I>(iter: I) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><Self, <a class="struct" href="../structopt/clap/struct.Error.html" title="struct structopt::clap::Error">Error</a>> <span class="where fmt-newline">where<br> Self: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,<br> I: <a class="trait" href="https://doc.rust-lang.org/nightly/core/iter/traits/collect/trait.IntoIterator.html" title="trait core::iter::traits::collect::IntoIterator">IntoIterator</a>,<br> I::<a class="type" href="https://doc.rust-lang.org/nightly/core/iter/traits/collect/trait.IntoIterator.html#associatedtype.Item" title="type core::iter::traits::collect::IntoIterator::Item">Item</a>: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a><<a class="struct" href="https://doc.rust-lang.org/nightly/std/ffi/os_str/struct.OsString.html" title="struct std::ffi::os_str::OsString">OsString</a>> + <a class="trait" href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a>, </span></code></h3><div class='docblock'><p>Gets the struct from any iterator such as a <code>Vec</code> of your making.</p>
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<p>Returns a <code>clap::Error</code> in case of failure. This does <em>not</em> exit in the
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case of <code>--help</code> or <code>--version</code>, to achieve the same behavior as
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<code>from_iter()</code> you must call <code>.exit()</code> on the error value.</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'></div><span class='loading-content'>Loading content...</span><script type="text/javascript">window.inlined_types=new Set([]);</script><script type="text/javascript" async
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