26 lines
6.9 KiB
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26 lines
6.9 KiB
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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<T, Error>`"><meta name="keywords" content="rust, rustlang, rust-lang, Result"><title>Result in anyhow - Rust</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../SourceSerif4-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../FiraSans-Regular.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../FiraSans-Medium.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../SourceCodePro-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../SourceSerif4-Bold.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../SourceCodePro-Semibold.ttf.woff2"><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="../ayu.css" disabled><link rel="stylesheet" type="text/css" href="../dark.css" disabled><link rel="stylesheet" type="text/css" href="../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../storage.js"></script><script src="../crates.js"></script><script defer src="../main.js"></script>
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</a><h2 class="location">Type Definition Result</h2><div class="sidebar-elems"><h2 class="location">Other items in<br><a href="index.html">anyhow</a></h2><div id="sidebar-vars" data-name="Result" data-ty="type" data-relpath=""></div><script defer src="sidebar-items.js"></script></div></nav><main><div class="width-limiter"><div class="sub-container"><a class="sub-logo-container" href="../anyhow/index.html"><img class="rust-logo" src="../rust-logo.png" alt="logo"></a><nav class="sub"><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!" aria-haspopup="menu" title="themes"><img width="18" height="18" alt="Pick another theme!" src="../brush.svg"></button><div id="theme-choices" role="menu"></div></div><form class="search-form"><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><button type="button" id="help-button" title="help">?</button><a id="settings-menu" href="../settings.html" title="settings"><img width="18" height="18" alt="Change settings" src="../wheel.svg"></a></div></form></nav></div><section id="main-content" class="content"><h1 class="fqn"><span class="in-band">Type Definition <a href="index.html">anyhow</a>::<wbr><a class="type" href="#">Result</a><button id="copy-path" onclick="copy_path(this)" title="Copy item path to clipboard"><img src="../clipboard.svg" width="19" height="18" alt="Copy item path"></button></span><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/anyhow/lib.rs.html#449" title="goto source code">[src]</a></span></h1><div class="docblock item-decl"><pre class="rust typedef"><code>pub type Result<T, E = <a class="struct" href="struct.Error.html" title="struct anyhow::Error">Error</a>> = <a class="enum" href="https://doc.rust-lang.org/1.59.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a><T, E>;</code></pre></div><details class="rustdoc-toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p><code>Result<T, Error></code></p>
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<p>This is a reasonable return type to use throughout your application but also
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for <code>fn main</code>; if you do, failures will be printed along with any
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<a href="trait.Context.html" title="Context">context</a> and a backtrace if one was captured.</p>
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<p><code>anyhow::Result</code> may be used with one <em>or</em> two type parameters.</p>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use</span> <span class="ident">anyhow::Result</span>;
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<span class="kw">fn</span> <span class="ident">demo1</span>() -> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {...}
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<span class="comment">// ^ equivalent to std::result::Result<T, anyhow::Error></span>
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<span class="kw">fn</span> <span class="ident">demo2</span>() -> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">T</span>, <span class="ident">OtherError</span><span class="op">></span> {...}
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<span class="comment">// ^ equivalent to std::result::Result<T, OtherError></span></code></pre></div>
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<h2 id="example" class="section-header"><a href="#example">Example</a></h2>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use</span> <span class="ident">anyhow::Result</span>;
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<span class="kw">fn</span> <span class="ident">main</span>() -> <span class="prelude-ty">Result</span><span class="op"><</span>()<span class="op">></span> {
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<span class="kw">let</span> <span class="ident">config</span> <span class="op">=</span> <span class="ident">std::fs::read_to_string</span>(<span class="string">"cluster.json"</span>)<span class="question-mark">?</span>;
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<span class="kw">let</span> <span class="ident">map</span>: <span class="ident">ClusterMap</span> <span class="op">=</span> <span class="ident">serde_json::from_str</span>(<span class="kw-2">&</span><span class="ident">config</span>)<span class="question-mark">?</span>;
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<span class="macro">println!</span>(<span class="string">"cluster info: {:#?}"</span>, <span class="ident">map</span>);
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<span class="prelude-val">Ok</span>(())
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}</code></pre></div>
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