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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="Macro allowing for easy generation of Generic Arrays. Example: `let test = arr![u32; 1, 2, 3];`"><meta name="keywords" content="rust, rustlang, rust-lang, arr"><title>arr in generic_array - Rust</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../static.files/SourceSerif4-Regular-1f7d512b176f0f72.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/SourceSerif4-Bold-124a1ca42af929b6.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-6827029ac823cab7.css" id="mainThemeStyle"><link rel="stylesheet" id="themeStyle" href="../static.files/light-ebce58d0a40c3431.css"><link rel="stylesheet" disabled href="../static.files/dark-f23faae4a2daf9a6.css"><link rel="stylesheet" disabled href="../static.files/ayu-8af5e100b21cd173.css"><script id="default-settings" ></script><script src="../static.files/storage-d43fa987303ecbbb.js"></script><script defer src="sidebar-items.js"></script><script defer src="../static.files/main-c55e1eb52e1886b4.js"></script><noscript><link rel="stylesheet" href="../static.files/noscript-13285aec31fa243e.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 macro"><!--[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">&#9776;</button><a class="sidebar-logo" href="../generic_array/index.html"><div class="logo-container"><img class="rust-logo" src="../static.files/rust-logo-151179464ae7ed46.svg" alt="logo"></div></a><h2></h2></nav><nav class="sidebar"><a class="sidebar-logo" href="../generic_array/index.html"><div class="logo-container"><img class="rust-logo" src="../static.files/rust-logo-151179464ae7ed46.svg" alt="logo"></div></a><div class="sidebar-elems"><h2><a href="index.html">In generic_array</a></h2></div></nav><main><div class="width-limiter"><nav class="sub"><form class="search-form"><span></span><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" title="help" tabindex="-1"><a href="../help.html">?</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-5ec35bf9ca753509.svg"></a></div></form></nav><section id="main-content" class="content"><div class="main-heading"><h1 class="fqn">Macro <a href="index.html">generic_array</a>::<wbr><a class="macro" href="#">arr</a><button id="copy-path" onclick="copy_path(this)" 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="srclink" href="../src/generic_array/arr.rs.html#58-67">source</a> · <button id="toggle-all-docs" title="collapse all docs">[<span>&#x2212;</span>]</button></span></div><div class="item-decl"><div class="example-wrap"><pre class="rust macro"><code><span class="macro">macro_rules! </span>arr {
(<span class="macro-nonterminal">$T</span>:ty; $(,)<span class="kw-2">*</span>) =&gt; { ... };
(<span class="macro-nonterminal">$T</span>:ty; $(<span class="macro-nonterminal">$x</span>:expr),* $(,)<span class="kw-2">*</span>) =&gt; { ... };
($(<span class="macro-nonterminal">$x</span>:expr,)+) =&gt; { ... };
() =&gt; { ... };
}</code></pre></div>
</div><details class="rustdoc-toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>Macro allowing for easy generation of Generic Arrays.
Example: <code>let test = arr![u32; 1, 2, 3];</code></p>
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