40 lines
5.8 KiB
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40 lines
5.8 KiB
HTML
<!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="Marks async function to be executed by selected runtime. This macro helps set up a `Runtime` without requiring the user to use Runtime or Builder directly."><title>main_rt in tokio_macros - Rust</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-6b053e98.ttf.woff2,FiraSans-Italic-81dc35de.woff2,FiraSans-Regular-0fe48ade.woff2,FiraSans-MediumItalic-ccf7e434.woff2,FiraSans-Medium-e1aa3f0a.woff2,SourceCodePro-Regular-8badfe75.ttf.woff2,SourceCodePro-Semibold-aa29a496.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2"href="../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../static.files/normalize-9960930a.css"><link rel="stylesheet" href="../static.files/rustdoc-ca0dd0c4.css"><meta name="rustdoc-vars" data-root-path="../" data-static-root-path="../static.files/" data-current-crate="tokio_macros" data-themes="" data-resource-suffix="" data-rustdoc-version="1.93.1 (01f6ddf75 2026-02-11) (Arch Linux rust 1:1.93.1-1)" data-channel="1.93.1" data-search-js="search-9e2438ea.js" data-stringdex-js="stringdex-a3946164.js" data-settings-js="settings-c38705f0.js" ><script src="../static.files/storage-e2aeef58.js"></script><script defer src="sidebar-items.js"></script><script defer src="../static.files/main-a410ff4d.js"></script><noscript><link rel="stylesheet" href="../static.files/noscript-263c88ec.css"></noscript><link rel="alternate icon" type="image/png" href="../static.files/favicon-32x32-eab170b8.png"><link rel="icon" type="image/svg+xml" href="../static.files/favicon-044be391.svg"></head><body class="rustdoc attr"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><rustdoc-topbar><h2><a href="#">main_rt</a></h2></rustdoc-topbar><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../tokio_macros/index.html">tokio_<wbr>macros</a><span class="version">2.6.0</span></h2></div><div class="sidebar-elems"><section id="rustdoc-toc"><h2 class="location"><a href="#">main_rt</a></h2><h3><a href="#">Sections</a></h3><ul class="block top-toc"><li><a href="#function-arguments" title="Function arguments:">Function arguments:</a></li><li><a href="#usage" title="Usage">Usage</a><ul><li><a href="#using-default" title="Using default">Using default</a></li><li><a href="#rename-package" title="Rename package">Rename package</a></li></ul></li></ul></section><div id="rustdoc-modnav"><h2 class="in-crate"><a href="index.html">In crate tokio_<wbr>macros</a></h2></div></div></nav><div class="sidebar-resizer" title="Drag to resize sidebar"></div><main><div class="width-limiter"><section id="main-content" class="content"><div class="main-heading"><div class="rustdoc-breadcrumbs"><a href="index.html">tokio_macros</a></div><h1>Attribute Macro <span class="attr">main_rt</span> <button id="copy-path" title="Copy item path to clipboard">Copy item path</button></h1><rustdoc-toolbar></rustdoc-toolbar><span class="sub-heading"><a class="src" href="../src/tokio_macros/lib.rs.html#370-372">Source</a> </span></div><pre class="rust item-decl"><code>#[main_rt]</code></pre><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>Marks async function to be executed by selected runtime. This macro helps set up a <code>Runtime</code>
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without requiring the user to use <a href="../tokio/runtime/struct.Runtime.html">Runtime</a> or
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<a href="../tokio/runtime/struct.Builder.html">Builder</a> directly.</p>
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<h3 id="function-arguments"><a class="doc-anchor" href="#function-arguments">§</a>Function arguments:</h3>
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<p>Arguments are allowed for any functions aside from <code>main</code> which is special</p>
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<h3 id="usage"><a class="doc-anchor" href="#usage">§</a>Usage</h3><h4 id="using-default"><a class="doc-anchor" href="#using-default">§</a>Using default</h4>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="attr">#[tokio::main(flavor = <span class="string">"current_thread"</span>)]
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</span><span class="kw">async fn </span>main() {
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<span class="macro">println!</span>(<span class="string">"Hello world"</span>);
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}</code></pre></div>
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<p>Equivalent code not using <code>#[tokio::main]</code></p>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">fn </span>main() {
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tokio::runtime::Builder::new_current_thread()
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.enable_all()
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.build()
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.unwrap()
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.block_on(<span class="kw">async </span>{
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<span class="macro">println!</span>(<span class="string">"Hello world"</span>);
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})
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}</code></pre></div><h4 id="rename-package"><a class="doc-anchor" href="#rename-package">§</a>Rename package</h4>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>tokio <span class="kw">as </span>tokio1;
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<span class="attr">#[tokio1::main(<span class="kw">crate </span>= <span class="string">"tokio1"</span>)]
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</span><span class="kw">async fn </span>main() {
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<span class="macro">println!</span>(<span class="string">"Hello world"</span>);
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}</code></pre></div>
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<p>Equivalent code not using <code>#[tokio::main]</code></p>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>tokio <span class="kw">as </span>tokio1;
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<span class="kw">fn </span>main() {
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tokio1::runtime::Builder::new_multi_thread()
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.enable_all()
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.build()
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.unwrap()
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.block_on(<span class="kw">async </span>{
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<span class="macro">println!</span>(<span class="string">"Hello world"</span>);
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})
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}</code></pre></div></div></details></section></div></main></body></html> |