| <!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/serde_derive-1.0.163/src/internals/receiver.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>receiver.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="../../../serde_derive/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="../../../serde_derive/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>internals::respan::respan; |
| <span class="kw">use </span>proc_macro2::Span; |
| <span class="kw">use </span>quote::ToTokens; |
| <span class="kw">use </span>std::mem; |
| <span class="kw">use </span>syn::punctuated::Punctuated; |
| <span class="kw">use </span>syn::{ |
| parse_quote, Data, DeriveInput, Expr, ExprPath, GenericArgument, GenericParam, Generics, Macro, |
| Path, PathArguments, QSelf, ReturnType, Type, TypeParamBound, TypePath, WherePredicate, |
| }; |
| |
| <span class="kw">pub fn </span>replace_receiver(input: <span class="kw-2">&mut </span>DeriveInput) { |
| <span class="kw">let </span>self_ty = { |
| <span class="kw">let </span>ident = <span class="kw-2">&</span>input.ident; |
| <span class="kw">let </span>ty_generics = input.generics.split_for_impl().<span class="number">1</span>; |
| <span class="macro">parse_quote!</span>(#ident #ty_generics) |
| }; |
| <span class="kw">let </span><span class="kw-2">mut </span>visitor = ReplaceReceiver(<span class="kw-2">&</span>self_ty); |
| visitor.visit_generics_mut(<span class="kw-2">&mut </span>input.generics); |
| visitor.visit_data_mut(<span class="kw-2">&mut </span>input.data); |
| } |
| |
| <span class="kw">struct </span>ReplaceReceiver<<span class="lifetime">'a</span>>(<span class="kw-2">&</span><span class="lifetime">'a </span>TypePath); |
| |
| <span class="kw">impl </span>ReplaceReceiver<<span class="lifetime">'_</span>> { |
| <span class="kw">fn </span>self_ty(<span class="kw-2">&</span><span class="self">self</span>, span: Span) -> TypePath { |
| <span class="kw">let </span>tokens = <span class="self">self</span>.<span class="number">0</span>.to_token_stream(); |
| <span class="kw">let </span>respanned = respan(tokens, span); |
| syn::parse2(respanned).unwrap() |
| } |
| |
| <span class="kw">fn </span>self_to_qself(<span class="kw-2">&</span><span class="self">self</span>, qself: <span class="kw-2">&mut </span><span class="prelude-ty">Option</span><QSelf>, path: <span class="kw-2">&mut </span>Path) { |
| <span class="kw">if </span>path.leading_colon.is_some() || path.segments[<span class="number">0</span>].ident != <span class="string">"Self" </span>{ |
| <span class="kw">return</span>; |
| } |
| |
| <span class="kw">if </span>path.segments.len() == <span class="number">1 </span>{ |
| <span class="self">self</span>.self_to_expr_path(path); |
| <span class="kw">return</span>; |
| } |
| |
| <span class="kw">let </span>span = path.segments[<span class="number">0</span>].ident.span(); |
| <span class="kw-2">*</span>qself = <span class="prelude-val">Some</span>(QSelf { |
| lt_token: <span class="macro">Token!</span>[<](span), |
| ty: Box::new(Type::Path(<span class="self">self</span>.self_ty(span))), |
| position: <span class="number">0</span>, |
| as_token: <span class="prelude-val">None</span>, |
| gt_token: <span class="macro">Token!</span>[>](span), |
| }); |
| |
| path.leading_colon = <span class="prelude-val">Some</span>(<span class="kw-2">**</span>path.segments.pairs().next().unwrap().punct().unwrap()); |
| |
| <span class="kw">let </span>segments = mem::replace(<span class="kw-2">&mut </span>path.segments, Punctuated::new()); |
| path.segments = segments.into_pairs().skip(<span class="number">1</span>).collect(); |
| } |
| |
| <span class="kw">fn </span>self_to_expr_path(<span class="kw-2">&</span><span class="self">self</span>, path: <span class="kw-2">&mut </span>Path) { |
| <span class="kw">let </span>self_ty = <span class="self">self</span>.self_ty(path.segments[<span class="number">0</span>].ident.span()); |
| <span class="kw">let </span>variant = mem::replace(path, self_ty.path); |
| <span class="kw">for </span>segment <span class="kw">in </span><span class="kw-2">&mut </span>path.segments { |
| <span class="kw">if let </span>PathArguments::AngleBracketed(bracketed) = <span class="kw-2">&mut </span>segment.arguments { |
| <span class="kw">if </span>bracketed.colon2_token.is_none() && !bracketed.args.is_empty() { |
| bracketed.colon2_token = <span class="prelude-val">Some</span>(<<span class="macro">Token!</span>[::]>::default()); |
| } |
| } |
| } |
| <span class="kw">if </span>variant.segments.len() > <span class="number">1 </span>{ |
| path.segments.push_punct(<<span class="macro">Token!</span>[::]>::default()); |
| path.segments.extend(variant.segments.into_pairs().skip(<span class="number">1</span>)); |
| } |
| } |
| } |
| |
| <span class="kw">impl </span>ReplaceReceiver<<span class="lifetime">'_</span>> { |
| <span class="comment">// `Self` -> `Receiver` |
| </span><span class="kw">fn </span>visit_type_mut(<span class="kw-2">&mut </span><span class="self">self</span>, ty: <span class="kw-2">&mut </span>Type) { |
| <span class="kw">let </span>span = <span class="kw">if let </span>Type::Path(node) = ty { |
| <span class="kw">if </span>node.qself.is_none() && node.path.is_ident(<span class="string">"Self"</span>) { |
| node.path.segments[<span class="number">0</span>].ident.span() |
| } <span class="kw">else </span>{ |
| <span class="self">self</span>.visit_type_path_mut(node); |
| <span class="kw">return</span>; |
| } |
| } <span class="kw">else </span>{ |
| <span class="self">self</span>.visit_type_mut_impl(ty); |
| <span class="kw">return</span>; |
| }; |
| <span class="kw-2">*</span>ty = <span class="self">self</span>.self_ty(span).into(); |
| } |
| |
| <span class="comment">// `Self::Assoc` -> `<Receiver>::Assoc` |
| </span><span class="kw">fn </span>visit_type_path_mut(<span class="kw-2">&mut </span><span class="self">self</span>, ty: <span class="kw-2">&mut </span>TypePath) { |
| <span class="kw">if </span>ty.qself.is_none() { |
| <span class="self">self</span>.self_to_qself(<span class="kw-2">&mut </span>ty.qself, <span class="kw-2">&mut </span>ty.path); |
| } |
| <span class="self">self</span>.visit_type_path_mut_impl(ty); |
| } |
| |
| <span class="comment">// `Self::method` -> `<Receiver>::method` |
| </span><span class="kw">fn </span>visit_expr_path_mut(<span class="kw-2">&mut </span><span class="self">self</span>, expr: <span class="kw-2">&mut </span>ExprPath) { |
| <span class="kw">if </span>expr.qself.is_none() { |
| <span class="self">self</span>.self_to_qself(<span class="kw-2">&mut </span>expr.qself, <span class="kw-2">&mut </span>expr.path); |
| } |
| <span class="self">self</span>.visit_expr_path_mut_impl(expr); |
| } |
| |
| <span class="comment">// Everything below is simply traversing the syntax tree. |
| |
| </span><span class="kw">fn </span>visit_type_mut_impl(<span class="kw-2">&mut </span><span class="self">self</span>, ty: <span class="kw-2">&mut </span>Type) { |
| <span class="kw">match </span>ty { |
| Type::Array(ty) => { |
| <span class="self">self</span>.visit_type_mut(<span class="kw-2">&mut </span>ty.elem); |
| <span class="self">self</span>.visit_expr_mut(<span class="kw-2">&mut </span>ty.len); |
| } |
| Type::BareFn(ty) => { |
| <span class="kw">for </span>arg <span class="kw">in </span><span class="kw-2">&mut </span>ty.inputs { |
| <span class="self">self</span>.visit_type_mut(<span class="kw-2">&mut </span>arg.ty); |
| } |
| <span class="self">self</span>.visit_return_type_mut(<span class="kw-2">&mut </span>ty.output); |
| } |
| Type::Group(ty) => <span class="self">self</span>.visit_type_mut(<span class="kw-2">&mut </span>ty.elem), |
| Type::ImplTrait(ty) => { |
| <span class="kw">for </span>bound <span class="kw">in </span><span class="kw-2">&mut </span>ty.bounds { |
| <span class="self">self</span>.visit_type_param_bound_mut(bound); |
| } |
| } |
| Type::Macro(ty) => <span class="self">self</span>.visit_macro_mut(<span class="kw-2">&mut </span>ty.mac), |
| Type::Paren(ty) => <span class="self">self</span>.visit_type_mut(<span class="kw-2">&mut </span>ty.elem), |
| Type::Path(ty) => { |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(qself) = <span class="kw-2">&mut </span>ty.qself { |
| <span class="self">self</span>.visit_type_mut(<span class="kw-2">&mut </span>qself.ty); |
| } |
| <span class="self">self</span>.visit_path_mut(<span class="kw-2">&mut </span>ty.path); |
| } |
| Type::Ptr(ty) => <span class="self">self</span>.visit_type_mut(<span class="kw-2">&mut </span>ty.elem), |
| Type::Reference(ty) => <span class="self">self</span>.visit_type_mut(<span class="kw-2">&mut </span>ty.elem), |
| Type::Slice(ty) => <span class="self">self</span>.visit_type_mut(<span class="kw-2">&mut </span>ty.elem), |
| Type::TraitObject(ty) => { |
| <span class="kw">for </span>bound <span class="kw">in </span><span class="kw-2">&mut </span>ty.bounds { |
| <span class="self">self</span>.visit_type_param_bound_mut(bound); |
| } |
| } |
| Type::Tuple(ty) => { |
| <span class="kw">for </span>elem <span class="kw">in </span><span class="kw-2">&mut </span>ty.elems { |
| <span class="self">self</span>.visit_type_mut(elem); |
| } |
| } |
| |
| Type::Infer(<span class="kw">_</span>) | Type::Never(<span class="kw">_</span>) | Type::Verbatim(<span class="kw">_</span>) => {} |
| |
| <span class="attribute">#[cfg_attr(all(test, exhaustive), deny(non_exhaustive_omitted_patterns))] |
| </span><span class="kw">_ </span>=> {} |
| } |
| } |
| |
| <span class="kw">fn </span>visit_type_path_mut_impl(<span class="kw-2">&mut </span><span class="self">self</span>, ty: <span class="kw-2">&mut </span>TypePath) { |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(qself) = <span class="kw-2">&mut </span>ty.qself { |
| <span class="self">self</span>.visit_type_mut(<span class="kw-2">&mut </span>qself.ty); |
| } |
| <span class="self">self</span>.visit_path_mut(<span class="kw-2">&mut </span>ty.path); |
| } |
| |
| <span class="kw">fn </span>visit_expr_path_mut_impl(<span class="kw-2">&mut </span><span class="self">self</span>, expr: <span class="kw-2">&mut </span>ExprPath) { |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(qself) = <span class="kw-2">&mut </span>expr.qself { |
| <span class="self">self</span>.visit_type_mut(<span class="kw-2">&mut </span>qself.ty); |
| } |
| <span class="self">self</span>.visit_path_mut(<span class="kw-2">&mut </span>expr.path); |
| } |
| |
| <span class="kw">fn </span>visit_path_mut(<span class="kw-2">&mut </span><span class="self">self</span>, path: <span class="kw-2">&mut </span>Path) { |
| <span class="kw">for </span>segment <span class="kw">in </span><span class="kw-2">&mut </span>path.segments { |
| <span class="self">self</span>.visit_path_arguments_mut(<span class="kw-2">&mut </span>segment.arguments); |
| } |
| } |
| |
| <span class="kw">fn </span>visit_path_arguments_mut(<span class="kw-2">&mut </span><span class="self">self</span>, arguments: <span class="kw-2">&mut </span>PathArguments) { |
| <span class="kw">match </span>arguments { |
| PathArguments::None => {} |
| PathArguments::AngleBracketed(arguments) => { |
| <span class="kw">for </span>arg <span class="kw">in </span><span class="kw-2">&mut </span>arguments.args { |
| <span class="kw">match </span>arg { |
| GenericArgument::Type(arg) => <span class="self">self</span>.visit_type_mut(arg), |
| GenericArgument::AssocType(arg) => <span class="self">self</span>.visit_type_mut(<span class="kw-2">&mut </span>arg.ty), |
| GenericArgument::Lifetime(<span class="kw">_</span>) |
| | GenericArgument::Const(<span class="kw">_</span>) |
| | GenericArgument::AssocConst(<span class="kw">_</span>) |
| | GenericArgument::Constraint(<span class="kw">_</span>) => {} |
| <span class="attribute">#[cfg_attr(all(test, exhaustive), deny(non_exhaustive_omitted_patterns))] |
| </span><span class="kw">_ </span>=> {} |
| } |
| } |
| } |
| PathArguments::Parenthesized(arguments) => { |
| <span class="kw">for </span>argument <span class="kw">in </span><span class="kw-2">&mut </span>arguments.inputs { |
| <span class="self">self</span>.visit_type_mut(argument); |
| } |
| <span class="self">self</span>.visit_return_type_mut(<span class="kw-2">&mut </span>arguments.output); |
| } |
| } |
| } |
| |
| <span class="kw">fn </span>visit_return_type_mut(<span class="kw-2">&mut </span><span class="self">self</span>, return_type: <span class="kw-2">&mut </span>ReturnType) { |
| <span class="kw">match </span>return_type { |
| ReturnType::Default => {} |
| ReturnType::Type(<span class="kw">_</span>, output) => <span class="self">self</span>.visit_type_mut(output), |
| } |
| } |
| |
| <span class="kw">fn </span>visit_type_param_bound_mut(<span class="kw-2">&mut </span><span class="self">self</span>, bound: <span class="kw-2">&mut </span>TypeParamBound) { |
| <span class="kw">match </span>bound { |
| TypeParamBound::Trait(bound) => <span class="self">self</span>.visit_path_mut(<span class="kw-2">&mut </span>bound.path), |
| TypeParamBound::Lifetime(<span class="kw">_</span>) | TypeParamBound::Verbatim(<span class="kw">_</span>) => {} |
| <span class="attribute">#[cfg_attr(all(test, exhaustive), deny(non_exhaustive_omitted_patterns))] |
| </span><span class="kw">_ </span>=> {} |
| } |
| } |
| |
| <span class="kw">fn </span>visit_generics_mut(<span class="kw-2">&mut </span><span class="self">self</span>, generics: <span class="kw-2">&mut </span>Generics) { |
| <span class="kw">for </span>param <span class="kw">in </span><span class="kw-2">&mut </span>generics.params { |
| <span class="kw">match </span>param { |
| GenericParam::Type(param) => { |
| <span class="kw">for </span>bound <span class="kw">in </span><span class="kw-2">&mut </span>param.bounds { |
| <span class="self">self</span>.visit_type_param_bound_mut(bound); |
| } |
| } |
| GenericParam::Lifetime(<span class="kw">_</span>) | GenericParam::Const(<span class="kw">_</span>) => {} |
| } |
| } |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(where_clause) = <span class="kw-2">&mut </span>generics.where_clause { |
| <span class="kw">for </span>predicate <span class="kw">in </span><span class="kw-2">&mut </span>where_clause.predicates { |
| <span class="kw">match </span>predicate { |
| WherePredicate::Type(predicate) => { |
| <span class="self">self</span>.visit_type_mut(<span class="kw-2">&mut </span>predicate.bounded_ty); |
| <span class="kw">for </span>bound <span class="kw">in </span><span class="kw-2">&mut </span>predicate.bounds { |
| <span class="self">self</span>.visit_type_param_bound_mut(bound); |
| } |
| } |
| WherePredicate::Lifetime(<span class="kw">_</span>) => {} |
| <span class="attribute">#[cfg_attr(all(test, exhaustive), deny(non_exhaustive_omitted_patterns))] |
| </span><span class="kw">_ </span>=> {} |
| } |
| } |
| } |
| } |
| |
| <span class="kw">fn </span>visit_data_mut(<span class="kw-2">&mut </span><span class="self">self</span>, data: <span class="kw-2">&mut </span>Data) { |
| <span class="kw">match </span>data { |
| Data::Struct(data) => { |
| <span class="kw">for </span>field <span class="kw">in </span><span class="kw-2">&mut </span>data.fields { |
| <span class="self">self</span>.visit_type_mut(<span class="kw-2">&mut </span>field.ty); |
| } |
| } |
| Data::Enum(data) => { |
| <span class="kw">for </span>variant <span class="kw">in </span><span class="kw-2">&mut </span>data.variants { |
| <span class="kw">for </span>field <span class="kw">in </span><span class="kw-2">&mut </span>variant.fields { |
| <span class="self">self</span>.visit_type_mut(<span class="kw-2">&mut </span>field.ty); |
| } |
| } |
| } |
| Data::Union(<span class="kw">_</span>) => {} |
| } |
| } |
| |
| <span class="kw">fn </span>visit_expr_mut(<span class="kw-2">&mut </span><span class="self">self</span>, expr: <span class="kw-2">&mut </span>Expr) { |
| <span class="kw">match </span>expr { |
| Expr::Binary(expr) => { |
| <span class="self">self</span>.visit_expr_mut(<span class="kw-2">&mut </span>expr.left); |
| <span class="self">self</span>.visit_expr_mut(<span class="kw-2">&mut </span>expr.right); |
| } |
| Expr::Call(expr) => { |
| <span class="self">self</span>.visit_expr_mut(<span class="kw-2">&mut </span>expr.func); |
| <span class="kw">for </span>arg <span class="kw">in </span><span class="kw-2">&mut </span>expr.args { |
| <span class="self">self</span>.visit_expr_mut(arg); |
| } |
| } |
| Expr::Cast(expr) => { |
| <span class="self">self</span>.visit_expr_mut(<span class="kw-2">&mut </span>expr.expr); |
| <span class="self">self</span>.visit_type_mut(<span class="kw-2">&mut </span>expr.ty); |
| } |
| Expr::Field(expr) => <span class="self">self</span>.visit_expr_mut(<span class="kw-2">&mut </span>expr.base), |
| Expr::Index(expr) => { |
| <span class="self">self</span>.visit_expr_mut(<span class="kw-2">&mut </span>expr.expr); |
| <span class="self">self</span>.visit_expr_mut(<span class="kw-2">&mut </span>expr.index); |
| } |
| Expr::Paren(expr) => <span class="self">self</span>.visit_expr_mut(<span class="kw-2">&mut </span>expr.expr), |
| Expr::Path(expr) => <span class="self">self</span>.visit_expr_path_mut(expr), |
| Expr::Unary(expr) => <span class="self">self</span>.visit_expr_mut(<span class="kw-2">&mut </span>expr.expr), |
| <span class="kw">_ </span>=> {} |
| } |
| } |
| |
| <span class="kw">fn </span>visit_macro_mut(<span class="kw-2">&mut </span><span class="self">self</span>, _mac: <span class="kw-2">&mut </span>Macro) {} |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../../" data-current-crate="serde_derive" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |
