| <!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="Source of the Rust file `/root/.cargo/registry/src/github.com-1ecc6299db9ec823/thiserror-impl-1.0.40/src/ast.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>ast.rs - source</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" href="../../normalize.css"><link rel="stylesheet" href="../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" href="../../ayu.css" disabled><link rel="stylesheet" href="../../dark.css" disabled><link rel="stylesheet" href="../../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../../storage.js"></script><script defer src="../../source-script.js"></script><script defer src="../../source-files.js"></script><script defer src="../../main.js"></script><noscript><link rel="stylesheet" href="../../noscript.css"></noscript><link rel="alternate icon" type="image/png" href="../../favicon-16x16.png"><link rel="alternate icon" type="image/png" href="../../favicon-32x32.png"><link rel="icon" type="image/svg+xml" href="../../favicon.svg"></head><body class="rustdoc source"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><a class="sidebar-logo" href="../../thiserror_impl/index.html"><div class="logo-container"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></div></a></nav><main><div class="width-limiter"><nav class="sub"><a class="sub-logo-container" href="../../thiserror_impl/index.html"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></a><form class="search-form"><div class="search-container"><span></span><input class="search-input" name="search" 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="../../wheel.svg"></a></div></div></form></nav><section id="main-content" class="content"><div class="example-wrap"><pre class="src-line-numbers"><span id="1">1</span> |
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| </pre><pre class="rust"><code><span class="kw">use </span><span class="kw">crate</span>::attr::{<span class="self">self</span>, Attrs}; |
| <span class="kw">use </span><span class="kw">crate</span>::generics::ParamsInScope; |
| <span class="kw">use </span>proc_macro2::Span; |
| <span class="kw">use </span>syn::{ |
| Data, DataEnum, DataStruct, DeriveInput, Error, Fields, Generics, Ident, Index, Member, <span class="prelude-ty">Result</span>, |
| Type, |
| }; |
| |
| <span class="kw">pub enum </span>Input<<span class="lifetime">'a</span>> { |
| Struct(Struct<<span class="lifetime">'a</span>>), |
| Enum(Enum<<span class="lifetime">'a</span>>), |
| } |
| |
| <span class="kw">pub struct </span>Struct<<span class="lifetime">'a</span>> { |
| <span class="kw">pub </span>original: <span class="kw-2">&</span><span class="lifetime">'a </span>DeriveInput, |
| <span class="kw">pub </span>attrs: Attrs<<span class="lifetime">'a</span>>, |
| <span class="kw">pub </span>ident: Ident, |
| <span class="kw">pub </span>generics: <span class="kw-2">&</span><span class="lifetime">'a </span>Generics, |
| <span class="kw">pub </span>fields: Vec<Field<<span class="lifetime">'a</span>>>, |
| } |
| |
| <span class="kw">pub struct </span>Enum<<span class="lifetime">'a</span>> { |
| <span class="kw">pub </span>original: <span class="kw-2">&</span><span class="lifetime">'a </span>DeriveInput, |
| <span class="kw">pub </span>attrs: Attrs<<span class="lifetime">'a</span>>, |
| <span class="kw">pub </span>ident: Ident, |
| <span class="kw">pub </span>generics: <span class="kw-2">&</span><span class="lifetime">'a </span>Generics, |
| <span class="kw">pub </span>variants: Vec<Variant<<span class="lifetime">'a</span>>>, |
| } |
| |
| <span class="kw">pub struct </span>Variant<<span class="lifetime">'a</span>> { |
| <span class="kw">pub </span>original: <span class="kw-2">&</span><span class="lifetime">'a </span>syn::Variant, |
| <span class="kw">pub </span>attrs: Attrs<<span class="lifetime">'a</span>>, |
| <span class="kw">pub </span>ident: Ident, |
| <span class="kw">pub </span>fields: Vec<Field<<span class="lifetime">'a</span>>>, |
| } |
| |
| <span class="kw">pub struct </span>Field<<span class="lifetime">'a</span>> { |
| <span class="kw">pub </span>original: <span class="kw-2">&</span><span class="lifetime">'a </span>syn::Field, |
| <span class="kw">pub </span>attrs: Attrs<<span class="lifetime">'a</span>>, |
| <span class="kw">pub </span>member: Member, |
| <span class="kw">pub </span>ty: <span class="kw-2">&</span><span class="lifetime">'a </span>Type, |
| <span class="kw">pub </span>contains_generic: bool, |
| } |
| |
| <span class="kw">impl</span><<span class="lifetime">'a</span>> Input<<span class="lifetime">'a</span>> { |
| <span class="kw">pub fn </span>from_syn(node: <span class="kw-2">&</span><span class="lifetime">'a </span>DeriveInput) -> <span class="prelude-ty">Result</span><<span class="self">Self</span>> { |
| <span class="kw">match </span><span class="kw-2">&</span>node.data { |
| Data::Struct(data) => Struct::from_syn(node, data).map(Input::Struct), |
| Data::Enum(data) => Enum::from_syn(node, data).map(Input::Enum), |
| Data::Union(<span class="kw">_</span>) => <span class="prelude-val">Err</span>(Error::new_spanned( |
| node, |
| <span class="string">"union as errors are not supported"</span>, |
| )), |
| } |
| } |
| } |
| |
| <span class="kw">impl</span><<span class="lifetime">'a</span>> Struct<<span class="lifetime">'a</span>> { |
| <span class="kw">fn </span>from_syn(node: <span class="kw-2">&</span><span class="lifetime">'a </span>DeriveInput, data: <span class="kw-2">&</span><span class="lifetime">'a </span>DataStruct) -> <span class="prelude-ty">Result</span><<span class="self">Self</span>> { |
| <span class="kw">let </span><span class="kw-2">mut </span>attrs = attr::get(<span class="kw-2">&</span>node.attrs)<span class="question-mark">?</span>; |
| <span class="kw">let </span>scope = ParamsInScope::new(<span class="kw-2">&</span>node.generics); |
| <span class="kw">let </span>span = attrs.span().unwrap_or_else(Span::call_site); |
| <span class="kw">let </span>fields = Field::multiple_from_syn(<span class="kw-2">&</span>data.fields, <span class="kw-2">&</span>scope, span)<span class="question-mark">?</span>; |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(display) = <span class="kw-2">&mut </span>attrs.display { |
| display.expand_shorthand(<span class="kw-2">&</span>fields); |
| } |
| <span class="prelude-val">Ok</span>(Struct { |
| original: node, |
| attrs, |
| ident: node.ident.clone(), |
| generics: <span class="kw-2">&</span>node.generics, |
| fields, |
| }) |
| } |
| } |
| |
| <span class="kw">impl</span><<span class="lifetime">'a</span>> Enum<<span class="lifetime">'a</span>> { |
| <span class="kw">fn </span>from_syn(node: <span class="kw-2">&</span><span class="lifetime">'a </span>DeriveInput, data: <span class="kw-2">&</span><span class="lifetime">'a </span>DataEnum) -> <span class="prelude-ty">Result</span><<span class="self">Self</span>> { |
| <span class="kw">let </span>attrs = attr::get(<span class="kw-2">&</span>node.attrs)<span class="question-mark">?</span>; |
| <span class="kw">let </span>scope = ParamsInScope::new(<span class="kw-2">&</span>node.generics); |
| <span class="kw">let </span>span = attrs.span().unwrap_or_else(Span::call_site); |
| <span class="kw">let </span>variants = data |
| .variants |
| .iter() |
| .map(|node| { |
| <span class="kw">let </span><span class="kw-2">mut </span>variant = Variant::from_syn(node, <span class="kw-2">&</span>scope, span)<span class="question-mark">?</span>; |
| <span class="kw">if let </span>display @ <span class="prelude-val">None </span>= <span class="kw-2">&mut </span>variant.attrs.display { |
| <span class="kw-2">*</span>display = attrs.display.clone(); |
| } |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(display) = <span class="kw-2">&mut </span>variant.attrs.display { |
| display.expand_shorthand(<span class="kw-2">&</span>variant.fields); |
| } <span class="kw">else if </span>variant.attrs.transparent.is_none() { |
| variant.attrs.transparent = attrs.transparent; |
| } |
| <span class="prelude-val">Ok</span>(variant) |
| }) |
| .collect::<<span class="prelude-ty">Result</span><<span class="kw">_</span>>>()<span class="question-mark">?</span>; |
| <span class="prelude-val">Ok</span>(Enum { |
| original: node, |
| attrs, |
| ident: node.ident.clone(), |
| generics: <span class="kw-2">&</span>node.generics, |
| variants, |
| }) |
| } |
| } |
| |
| <span class="kw">impl</span><<span class="lifetime">'a</span>> Variant<<span class="lifetime">'a</span>> { |
| <span class="kw">fn </span>from_syn(node: <span class="kw-2">&</span><span class="lifetime">'a </span>syn::Variant, scope: <span class="kw-2">&</span>ParamsInScope<<span class="lifetime">'a</span>>, span: Span) -> <span class="prelude-ty">Result</span><<span class="self">Self</span>> { |
| <span class="kw">let </span>attrs = attr::get(<span class="kw-2">&</span>node.attrs)<span class="question-mark">?</span>; |
| <span class="kw">let </span>span = attrs.span().unwrap_or(span); |
| <span class="prelude-val">Ok</span>(Variant { |
| original: node, |
| attrs, |
| ident: node.ident.clone(), |
| fields: Field::multiple_from_syn(<span class="kw-2">&</span>node.fields, scope, span)<span class="question-mark">?</span>, |
| }) |
| } |
| } |
| |
| <span class="kw">impl</span><<span class="lifetime">'a</span>> Field<<span class="lifetime">'a</span>> { |
| <span class="kw">fn </span>multiple_from_syn( |
| fields: <span class="kw-2">&</span><span class="lifetime">'a </span>Fields, |
| scope: <span class="kw-2">&</span>ParamsInScope<<span class="lifetime">'a</span>>, |
| span: Span, |
| ) -> <span class="prelude-ty">Result</span><Vec<<span class="self">Self</span>>> { |
| fields |
| .iter() |
| .enumerate() |
| .map(|(i, field)| Field::from_syn(i, field, scope, span)) |
| .collect() |
| } |
| |
| <span class="kw">fn </span>from_syn( |
| i: usize, |
| node: <span class="kw-2">&</span><span class="lifetime">'a </span>syn::Field, |
| scope: <span class="kw-2">&</span>ParamsInScope<<span class="lifetime">'a</span>>, |
| span: Span, |
| ) -> <span class="prelude-ty">Result</span><<span class="self">Self</span>> { |
| <span class="prelude-val">Ok</span>(Field { |
| original: node, |
| attrs: attr::get(<span class="kw-2">&</span>node.attrs)<span class="question-mark">?</span>, |
| member: node.ident.clone().map(Member::Named).unwrap_or_else(|| { |
| Member::Unnamed(Index { |
| index: i <span class="kw">as </span>u32, |
| span, |
| }) |
| }), |
| ty: <span class="kw-2">&</span>node.ty, |
| contains_generic: scope.intersects(<span class="kw-2">&</span>node.ty), |
| }) |
| } |
| } |
| |
| <span class="kw">impl </span>Attrs<<span class="lifetime">'_</span>> { |
| <span class="kw">pub fn </span>span(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><Span> { |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(display) = <span class="kw-2">&</span><span class="self">self</span>.display { |
| <span class="prelude-val">Some</span>(display.fmt.span()) |
| } <span class="kw">else if let </span><span class="prelude-val">Some</span>(transparent) = <span class="kw-2">&</span><span class="self">self</span>.transparent { |
| <span class="prelude-val">Some</span>(transparent.span) |
| } <span class="kw">else </span>{ |
| <span class="prelude-val">None |
| </span>} |
| } |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../" data-current-crate="thiserror_impl" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |
