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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>`" > < title > Result in anyhow - Rust< / title > < script > if ( window . location . protocol !== "file:" ) document . head . insertAdjacentHTML ( "beforeend" , "SourceSerif4-Regular-46f98efaafac5295.ttf.woff2,FiraSans-Regular-018c141bf0843ffd.woff2,FiraSans-Medium-8f9a781e4970d388.woff2,SourceCodePro-Regular-562dcc5011b6de7d.ttf.woff2,SourceCodePro-Semibold-d899c5a5c4aeb14a.ttf.woff2" . split ( "," ) . map ( f => ` <link rel="preload" as="font" type="font/woff2" crossorigin href="../static.files/ ${ f } "> ` ) . join ( "" ) ) < / script > < link rel = "stylesheet" href = "../static.files/normalize-76eba96aa4d2e634.css" > < link rel = "stylesheet" href = "../static.files/rustdoc-dd39b87e5fcfba68.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 = "1.80.0 (051478957 2024-07-21)" data-channel = "1.80.0" data-search-js = "search-d52510db62a78183.js" data-settings-js = "settings-4313503d2e1961c2.js" > < script src = "../static.files/storage-118b08c4c78b968e.js" > < / script > < script defer src = "sidebar-items.js" > < / script > < script defer src = "../static.files/main-20a3ad099b048cf2.js" > < / script > < noscript > < link rel = "stylesheet" href = "../static.files/noscript-df360f571f6edeae.css" > < / noscript > < 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" > 1.0.86< / 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" > < rustdoc-search > < / rustdoc-search > < 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" > 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 > − < / span > ]< / button > < / span > < / div > < pre class = "rust item-decl" > < 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/1.80.0/core/result/enum.Result.html" title = "enum core::result::Result" > Result< / a > < T, E> ;< / code > < / pre > < details class = "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
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() -> < span class = "prelude-ty" > Result< / span > < T> {...}
< span class = "comment" > // ^ equivalent to std::result::Result< T, anyhow::Error>
< / span > < span class = "kw" > fn < / span > demo2() -> < span class = "prelude-ty" > Result< / span > < T, OtherError> {...}
< span class = "comment" > // ^ equivalent to std::result::Result< T, OtherError> < / span > < / code > < / pre > < / div >
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< h2 id = "example" > < a class = "doc-anchor" href = "#example" > §< / a > Example< / h2 >
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< div class = "example-wrap" > < pre class = "rust rust-example-rendered" > < code > < span class = "kw" > use < / span > anyhow::Result;
< span class = "kw" > fn < / span > main() -> < span class = "prelude-ty" > Result< / span > < ()> {
< 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" > & < / 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< T, E = < a class = "struct" href = "struct.Error.html" title = "struct anyhow::Error" > Error< / a > > {
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 >
