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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="`Result&lt;T, Error&gt;`"><title>Result in anyhow - 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="anyhow" 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 type"><!--[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></nav><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../anyhow/index.html">anyhow</a><span class="version">1.0.80</span></h2></div><h2 class="location"><a href="#">Result</a></h2><div class="sidebar-elems"><section><h3><a href="#aliased-type">Aliased type</a></h3><h3><a href="#variants">Variants</a></h3><ul class="block variant"><li><a href="#variant.Err">Err</a></li><li><a href="#variant.Ok">Ok</a></li></ul></section><h2><a href="index.html">In crate anyhow</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="../anyhow/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>Type Alias <a href="index.html">anyhow</a>::<wbr><a class="type" href="#">Result</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/anyhow/lib.rs.html#466">source</a> · <button id="toggle-all-docs" title="collapse all docs">[<span>&#x2212;</span>]</button></span></div><pre class="rust item-decl"><code>pub type Result&lt;T, E = <a class="struct" href="struct.Error.html" title="struct anyhow::Error">Error</a>&gt; = <a class="enum" href="https://doc.rust-lang.org/1.77.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;T, E&gt;;</code></pre><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p><code>Result&lt;T, Error&gt;</code></p>
deploy: 22498719e1dbb1ddc4a5584a4fcba2f337ccb991
2024-03-11 08:39:13 +00:00
<p>This is a reasonable return type to use throughout your application but also
for <code>fn main</code>; if you do, failures will be printed along with any
<a href="trait.Context.html" title="trait anyhow::Context">context</a> and a backtrace if one was captured.</p>
<p><code>anyhow::Result</code> may be used with one <em>or</em> two type parameters.</p>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>anyhow::Result;
<span class="kw">fn </span>demo1() -&gt; <span class="prelude-ty">Result</span>&lt;T&gt; {...}
<span class="comment">// ^ equivalent to std::result::Result&lt;T, anyhow::Error&gt;
</span><span class="kw">fn </span>demo2() -&gt; <span class="prelude-ty">Result</span>&lt;T, OtherError&gt; {...}
<span class="comment">// ^ equivalent to std::result::Result&lt;T, OtherError&gt;</span></code></pre></div>
deploy: 39fc7f2b9fd58ce67982b1c71c788f3b031ae3df
2024-03-27 11:12:16 +00:00
<h2 id="example"><a class="doc-anchor" href="#example">§</a>Example</h2>
deploy: 22498719e1dbb1ddc4a5584a4fcba2f337ccb991
2024-03-11 08:39:13 +00:00
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>anyhow::Result;
<span class="kw">fn </span>main() -&gt; <span class="prelude-ty">Result</span>&lt;()&gt; {
<span class="kw">let </span>config = std::fs::read_to_string(<span class="string">"cluster.json"</span>)<span class="question-mark">?</span>;
<span class="kw">let </span>map: ClusterMap = serde_json::from_str(<span class="kw-2">&amp;</span>config)<span class="question-mark">?</span>;
<span class="macro">println!</span>(<span class="string">"cluster info: {:#?}"</span>, map);
<span class="prelude-val">Ok</span>(())
}</code></pre></div>
</div></details><h2 id="aliased-type" class="section-header">Aliased Type<a href="#aliased-type" class="anchor">§</a></h2><pre class="rust item-decl"><code>enum Result&lt;T, E = <a class="struct" href="struct.Error.html" title="struct anyhow::Error">Error</a>&gt; {
Ok(T),
Err(E),
}</code></pre><h2 id="variants" class="variants section-header">Variants<a href="#variants" class="anchor">§</a></h2><div class="variants"><section id="variant.Ok" class="variant"><a href="#variant.Ok" class="anchor">§</a><span class="since rightside" title="Stable since Rust version 1.0.0">1.0.0</span><h3 class="code-header">Ok(T)</h3></section><div class="docblock"><p>Contains the success value</p>
</div><section id="variant.Err" class="variant"><a href="#variant.Err" class="anchor">§</a><span class="since rightside" title="Stable since Rust version 1.0.0">1.0.0</span><h3 class="code-header">Err(E)</h3></section><div class="docblock"><p>Contains the error value</p>
</div></div><script src="../type.impl/core/result/enum.Result.js" data-self-path="anyhow::Result" async></script></section></div></main></body></html>
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