| <!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/prost-derive-0.9.0/src/field/map.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>map.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="../../../prost_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="../../../prost_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>anyhow::{bail, Error}; |
| <span class="kw">use </span>proc_macro2::{Span, TokenStream}; |
| <span class="kw">use </span>quote::quote; |
| <span class="kw">use </span>syn::{Ident, Lit, Meta, MetaNameValue, NestedMeta}; |
| |
| <span class="kw">use </span><span class="kw">crate</span>::field::{scalar, set_option, tag_attr}; |
| |
| <span class="attribute">#[derive(Clone, Debug)] |
| </span><span class="kw">pub enum </span>MapTy { |
| HashMap, |
| BTreeMap, |
| } |
| |
| <span class="kw">impl </span>MapTy { |
| <span class="kw">fn </span>from_str(s: <span class="kw-2">&</span>str) -> <span class="prelude-ty">Option</span><MapTy> { |
| <span class="kw">match </span>s { |
| <span class="string">"map" </span>| <span class="string">"hash_map" </span>=> <span class="prelude-val">Some</span>(MapTy::HashMap), |
| <span class="string">"btree_map" </span>=> <span class="prelude-val">Some</span>(MapTy::BTreeMap), |
| <span class="kw">_ </span>=> <span class="prelude-val">None</span>, |
| } |
| } |
| |
| <span class="kw">fn </span>module(<span class="kw-2">&</span><span class="self">self</span>) -> Ident { |
| <span class="kw">match </span><span class="kw-2">*</span><span class="self">self </span>{ |
| MapTy::HashMap => Ident::new(<span class="string">"hash_map"</span>, Span::call_site()), |
| MapTy::BTreeMap => Ident::new(<span class="string">"btree_map"</span>, Span::call_site()), |
| } |
| } |
| |
| <span class="kw">fn </span>lib(<span class="kw-2">&</span><span class="self">self</span>) -> TokenStream { |
| <span class="kw">match </span><span class="self">self </span>{ |
| MapTy::HashMap => <span class="macro">quote! </span>{ std }, |
| MapTy::BTreeMap => <span class="macro">quote! </span>{ prost::alloc }, |
| } |
| } |
| } |
| |
| <span class="kw">fn </span>fake_scalar(ty: scalar::Ty) -> scalar::Field { |
| <span class="kw">let </span>kind = scalar::Kind::Plain(scalar::DefaultValue::new(<span class="kw-2">&</span>ty)); |
| scalar::Field { |
| ty, |
| kind, |
| tag: <span class="number">0</span>, <span class="comment">// Not used here |
| </span>} |
| } |
| |
| <span class="attribute">#[derive(Clone)] |
| </span><span class="kw">pub struct </span>Field { |
| <span class="kw">pub </span>map_ty: MapTy, |
| <span class="kw">pub </span>key_ty: scalar::Ty, |
| <span class="kw">pub </span>value_ty: ValueTy, |
| <span class="kw">pub </span>tag: u32, |
| } |
| |
| <span class="kw">impl </span>Field { |
| <span class="kw">pub fn </span>new(attrs: <span class="kw-2">&</span>[Meta], inferred_tag: <span class="prelude-ty">Option</span><u32>) -> <span class="prelude-ty">Result</span><<span class="prelude-ty">Option</span><Field>, Error> { |
| <span class="kw">let </span><span class="kw-2">mut </span>types = <span class="prelude-val">None</span>; |
| <span class="kw">let </span><span class="kw-2">mut </span>tag = <span class="prelude-val">None</span>; |
| |
| <span class="kw">for </span>attr <span class="kw">in </span>attrs { |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(t) = tag_attr(attr)<span class="question-mark">? </span>{ |
| set_option(<span class="kw-2">&mut </span>tag, t, <span class="string">"duplicate tag attributes"</span>)<span class="question-mark">?</span>; |
| } <span class="kw">else if let </span><span class="prelude-val">Some</span>(map_ty) = attr |
| .path() |
| .get_ident() |
| .and_then(|i| MapTy::from_str(<span class="kw-2">&</span>i.to_string())) |
| { |
| <span class="kw">let </span>(k, v): (String, String) = <span class="kw">match </span><span class="kw-2">&*</span>attr { |
| Meta::NameValue(MetaNameValue { |
| lit: Lit::Str(lit), .. |
| }) => { |
| <span class="kw">let </span>items = lit.value(); |
| <span class="kw">let </span><span class="kw-2">mut </span>items = items.split(<span class="string">','</span>).map(ToString::to_string); |
| <span class="kw">let </span>k = items.next().unwrap(); |
| <span class="kw">let </span>v = <span class="kw">match </span>items.next() { |
| <span class="prelude-val">Some</span>(k) => k, |
| <span class="prelude-val">None </span>=> <span class="macro">bail!</span>(<span class="string">"invalid map attribute: must have key and value types"</span>), |
| }; |
| <span class="kw">if </span>items.next().is_some() { |
| <span class="macro">bail!</span>(<span class="string">"invalid map attribute: {:?}"</span>, attr); |
| } |
| (k, v) |
| } |
| Meta::List(meta_list) => { |
| <span class="comment">// TODO(rustlang/rust#23121): slice pattern matching would make this much nicer. |
| </span><span class="kw">if </span>meta_list.nested.len() != <span class="number">2 </span>{ |
| <span class="macro">bail!</span>(<span class="string">"invalid map attribute: must contain key and value types"</span>); |
| } |
| <span class="kw">let </span>k = <span class="kw">match </span><span class="kw-2">&</span>meta_list.nested[<span class="number">0</span>] { |
| NestedMeta::Meta(Meta::Path(k)) <span class="kw">if </span>k.get_ident().is_some() => { |
| k.get_ident().unwrap().to_string() |
| } |
| <span class="kw">_ </span>=> <span class="macro">bail!</span>(<span class="string">"invalid map attribute: key must be an identifier"</span>), |
| }; |
| <span class="kw">let </span>v = <span class="kw">match </span><span class="kw-2">&</span>meta_list.nested[<span class="number">1</span>] { |
| NestedMeta::Meta(Meta::Path(v)) <span class="kw">if </span>v.get_ident().is_some() => { |
| v.get_ident().unwrap().to_string() |
| } |
| <span class="kw">_ </span>=> <span class="macro">bail!</span>(<span class="string">"invalid map attribute: value must be an identifier"</span>), |
| }; |
| (k, v) |
| } |
| <span class="kw">_ </span>=> <span class="kw">return </span><span class="prelude-val">Ok</span>(<span class="prelude-val">None</span>), |
| }; |
| set_option( |
| <span class="kw-2">&mut </span>types, |
| (map_ty, key_ty_from_str(<span class="kw-2">&</span>k)<span class="question-mark">?</span>, ValueTy::from_str(<span class="kw-2">&</span>v)<span class="question-mark">?</span>), |
| <span class="string">"duplicate map type attribute"</span>, |
| )<span class="question-mark">?</span>; |
| } <span class="kw">else </span>{ |
| <span class="kw">return </span><span class="prelude-val">Ok</span>(<span class="prelude-val">None</span>); |
| } |
| } |
| |
| <span class="prelude-val">Ok</span>(<span class="kw">match </span>(types, tag.or(inferred_tag)) { |
| (<span class="prelude-val">Some</span>((map_ty, key_ty, value_ty)), <span class="prelude-val">Some</span>(tag)) => <span class="prelude-val">Some</span>(Field { |
| map_ty, |
| key_ty, |
| value_ty, |
| tag, |
| }), |
| <span class="kw">_ </span>=> <span class="prelude-val">None</span>, |
| }) |
| } |
| |
| <span class="kw">pub fn </span>new_oneof(attrs: <span class="kw-2">&</span>[Meta]) -> <span class="prelude-ty">Result</span><<span class="prelude-ty">Option</span><Field>, Error> { |
| Field::new(attrs, <span class="prelude-val">None</span>) |
| } |
| |
| <span class="doccomment">/// Returns a statement which encodes the map field. |
| </span><span class="kw">pub fn </span>encode(<span class="kw-2">&</span><span class="self">self</span>, ident: TokenStream) -> TokenStream { |
| <span class="kw">let </span>tag = <span class="self">self</span>.tag; |
| <span class="kw">let </span>key_mod = <span class="self">self</span>.key_ty.module(); |
| <span class="kw">let </span>ke = <span class="macro">quote!</span>(::prost::encoding::#key_mod::encode); |
| <span class="kw">let </span>kl = <span class="macro">quote!</span>(::prost::encoding::#key_mod::encoded_len); |
| <span class="kw">let </span>module = <span class="self">self</span>.map_ty.module(); |
| <span class="kw">match </span><span class="kw-2">&</span><span class="self">self</span>.value_ty { |
| ValueTy::Scalar(scalar::Ty::Enumeration(ty)) => { |
| <span class="kw">let </span>default = <span class="macro">quote!</span>(#ty::default() <span class="kw">as </span>i32); |
| <span class="macro">quote! </span>{ |
| ::prost::encoding::#module::encode_with_default( |
| #ke, |
| #kl, |
| ::prost::encoding::int32::encode, |
| ::prost::encoding::int32::encoded_len, |
| <span class="kw-2">&</span>(#default), |
| #tag, |
| <span class="kw-2">&</span>#ident, |
| buf, |
| ); |
| } |
| } |
| ValueTy::Scalar(value_ty) => { |
| <span class="kw">let </span>val_mod = value_ty.module(); |
| <span class="kw">let </span>ve = <span class="macro">quote!</span>(::prost::encoding::#val_mod::encode); |
| <span class="kw">let </span>vl = <span class="macro">quote!</span>(::prost::encoding::#val_mod::encoded_len); |
| <span class="macro">quote! </span>{ |
| ::prost::encoding::#module::encode( |
| #ke, |
| #kl, |
| #ve, |
| #vl, |
| #tag, |
| <span class="kw-2">&</span>#ident, |
| buf, |
| ); |
| } |
| } |
| ValueTy::Message => <span class="macro">quote! </span>{ |
| ::prost::encoding::#module::encode( |
| #ke, |
| #kl, |
| ::prost::encoding::message::encode, |
| ::prost::encoding::message::encoded_len, |
| #tag, |
| <span class="kw-2">&</span>#ident, |
| buf, |
| ); |
| }, |
| } |
| } |
| |
| <span class="doccomment">/// Returns an expression which evaluates to the result of merging a decoded key value pair |
| /// into the map. |
| </span><span class="kw">pub fn </span>merge(<span class="kw-2">&</span><span class="self">self</span>, ident: TokenStream) -> TokenStream { |
| <span class="kw">let </span>key_mod = <span class="self">self</span>.key_ty.module(); |
| <span class="kw">let </span>km = <span class="macro">quote!</span>(::prost::encoding::#key_mod::merge); |
| <span class="kw">let </span>module = <span class="self">self</span>.map_ty.module(); |
| <span class="kw">match </span><span class="kw-2">&</span><span class="self">self</span>.value_ty { |
| ValueTy::Scalar(scalar::Ty::Enumeration(ty)) => { |
| <span class="kw">let </span>default = <span class="macro">quote!</span>(#ty::default() <span class="kw">as </span>i32); |
| <span class="macro">quote! </span>{ |
| ::prost::encoding::#module::merge_with_default( |
| #km, |
| ::prost::encoding::int32::merge, |
| #default, |
| <span class="kw-2">&mut </span>#ident, |
| buf, |
| ctx, |
| ) |
| } |
| } |
| ValueTy::Scalar(value_ty) => { |
| <span class="kw">let </span>val_mod = value_ty.module(); |
| <span class="kw">let </span>vm = <span class="macro">quote!</span>(::prost::encoding::#val_mod::merge); |
| <span class="macro">quote!</span>(::prost::encoding::#module::merge(#km, #vm, <span class="kw-2">&mut </span>#ident, buf, ctx)) |
| } |
| ValueTy::Message => <span class="macro">quote! </span>{ |
| ::prost::encoding::#module::merge( |
| #km, |
| ::prost::encoding::message::merge, |
| <span class="kw-2">&mut </span>#ident, |
| buf, |
| ctx, |
| ) |
| }, |
| } |
| } |
| |
| <span class="doccomment">/// Returns an expression which evaluates to the encoded length of the map. |
| </span><span class="kw">pub fn </span>encoded_len(<span class="kw-2">&</span><span class="self">self</span>, ident: TokenStream) -> TokenStream { |
| <span class="kw">let </span>tag = <span class="self">self</span>.tag; |
| <span class="kw">let </span>key_mod = <span class="self">self</span>.key_ty.module(); |
| <span class="kw">let </span>kl = <span class="macro">quote!</span>(::prost::encoding::#key_mod::encoded_len); |
| <span class="kw">let </span>module = <span class="self">self</span>.map_ty.module(); |
| <span class="kw">match </span><span class="kw-2">&</span><span class="self">self</span>.value_ty { |
| ValueTy::Scalar(scalar::Ty::Enumeration(ty)) => { |
| <span class="kw">let </span>default = <span class="macro">quote!</span>(#ty::default() <span class="kw">as </span>i32); |
| <span class="macro">quote! </span>{ |
| ::prost::encoding::#module::encoded_len_with_default( |
| #kl, |
| ::prost::encoding::int32::encoded_len, |
| <span class="kw-2">&</span>(#default), |
| #tag, |
| <span class="kw-2">&</span>#ident, |
| ) |
| } |
| } |
| ValueTy::Scalar(value_ty) => { |
| <span class="kw">let </span>val_mod = value_ty.module(); |
| <span class="kw">let </span>vl = <span class="macro">quote!</span>(::prost::encoding::#val_mod::encoded_len); |
| <span class="macro">quote!</span>(::prost::encoding::#module::encoded_len(#kl, #vl, #tag, <span class="kw-2">&</span>#ident)) |
| } |
| ValueTy::Message => <span class="macro">quote! </span>{ |
| ::prost::encoding::#module::encoded_len( |
| #kl, |
| ::prost::encoding::message::encoded_len, |
| #tag, |
| <span class="kw-2">&</span>#ident, |
| ) |
| }, |
| } |
| } |
| |
| <span class="kw">pub fn </span>clear(<span class="kw-2">&</span><span class="self">self</span>, ident: TokenStream) -> TokenStream { |
| <span class="macro">quote!</span>(#ident.clear()) |
| } |
| |
| <span class="doccomment">/// Returns methods to embed in the message. |
| </span><span class="kw">pub fn </span>methods(<span class="kw-2">&</span><span class="self">self</span>, ident: <span class="kw-2">&</span>Ident) -> <span class="prelude-ty">Option</span><TokenStream> { |
| <span class="kw">if let </span>ValueTy::Scalar(scalar::Ty::Enumeration(ty)) = <span class="kw-2">&</span><span class="self">self</span>.value_ty { |
| <span class="kw">let </span>key_ty = <span class="self">self</span>.key_ty.rust_type(); |
| <span class="kw">let </span>key_ref_ty = <span class="self">self</span>.key_ty.rust_ref_type(); |
| |
| <span class="kw">let </span>get = Ident::new(<span class="kw-2">&</span><span class="macro">format!</span>(<span class="string">"get_{}"</span>, ident), Span::call_site()); |
| <span class="kw">let </span>insert = Ident::new(<span class="kw-2">&</span><span class="macro">format!</span>(<span class="string">"insert_{}"</span>, ident), Span::call_site()); |
| <span class="kw">let </span>take_ref = <span class="kw">if </span><span class="self">self</span>.key_ty.is_numeric() { |
| <span class="macro">quote!</span>(<span class="kw-2">&</span>) |
| } <span class="kw">else </span>{ |
| <span class="macro">quote!</span>() |
| }; |
| |
| <span class="kw">let </span>get_doc = <span class="macro">format!</span>( |
| <span class="string">"Returns the enum value for the corresponding key in `{}`, \ |
| or `None` if the entry does not exist or it is not a valid enum value."</span>, |
| ident, |
| ); |
| <span class="kw">let </span>insert_doc = <span class="macro">format!</span>(<span class="string">"Inserts a key value pair into `{}`."</span>, ident); |
| <span class="prelude-val">Some</span>(<span class="macro">quote! </span>{ |
| <span class="attribute">#[doc=#get_doc] |
| </span><span class="kw">pub fn </span>#get(<span class="kw-2">&</span><span class="self">self</span>, key: #key_ref_ty) -> ::core::option::Option<#ty> { |
| <span class="self">self</span>.#ident.get(#take_ref key).cloned().and_then(#ty::from_i32) |
| } |
| <span class="attribute">#[doc=#insert_doc] |
| </span><span class="kw">pub fn </span>#insert(<span class="kw-2">&mut </span><span class="self">self</span>, key: #key_ty, value: #ty) -> ::core::option::Option<#ty> { |
| <span class="self">self</span>.#ident.insert(key, value <span class="kw">as </span>i32).and_then(#ty::from_i32) |
| } |
| }) |
| } <span class="kw">else </span>{ |
| <span class="prelude-val">None |
| </span>} |
| } |
| |
| <span class="doccomment">/// Returns a newtype wrapper around the map, implementing nicer Debug |
| /// |
| /// The Debug tries to convert any enumerations met into the variants if possible, instead of |
| /// outputting the raw numbers. |
| </span><span class="kw">pub fn </span>debug(<span class="kw-2">&</span><span class="self">self</span>, wrapper_name: TokenStream) -> TokenStream { |
| <span class="kw">let </span>type_name = <span class="kw">match </span><span class="self">self</span>.map_ty { |
| MapTy::HashMap => Ident::new(<span class="string">"HashMap"</span>, Span::call_site()), |
| MapTy::BTreeMap => Ident::new(<span class="string">"BTreeMap"</span>, Span::call_site()), |
| }; |
| |
| <span class="comment">// A fake field for generating the debug wrapper |
| </span><span class="kw">let </span>key_wrapper = fake_scalar(<span class="self">self</span>.key_ty.clone()).debug(<span class="macro">quote!</span>(KeyWrapper)); |
| <span class="kw">let </span>key = <span class="self">self</span>.key_ty.rust_type(); |
| <span class="kw">let </span>value_wrapper = <span class="self">self</span>.value_ty.debug(); |
| <span class="kw">let </span>libname = <span class="self">self</span>.map_ty.lib(); |
| <span class="kw">let </span>fmt = <span class="macro">quote! </span>{ |
| <span class="kw">fn </span>fmt(<span class="kw-2">&</span><span class="self">self</span>, f: <span class="kw-2">&mut </span>::core::fmt::Formatter) -> ::core::fmt::Result { |
| #key_wrapper |
| #value_wrapper |
| <span class="kw">let </span><span class="kw-2">mut </span>builder = f.debug_map(); |
| <span class="kw">for </span>(k, v) <span class="kw">in </span><span class="self">self</span>.<span class="number">0 </span>{ |
| builder.entry(<span class="kw-2">&</span>KeyWrapper(k), <span class="kw-2">&</span>ValueWrapper(v)); |
| } |
| builder.finish() |
| } |
| }; |
| <span class="kw">match </span><span class="kw-2">&</span><span class="self">self</span>.value_ty { |
| ValueTy::Scalar(ty) => { |
| <span class="kw">if let </span><span class="kw-2">&</span>scalar::Ty::Bytes(<span class="kw">_</span>) = ty { |
| <span class="kw">return </span><span class="macro">quote! </span>{ |
| <span class="kw">struct </span>#wrapper_name<<span class="lifetime">'a</span>>(<span class="kw-2">&</span><span class="lifetime">'a </span><span class="kw">dyn </span>::core::fmt::Debug); |
| <span class="kw">impl</span><<span class="lifetime">'a</span>> ::core::fmt::Debug <span class="kw">for </span>#wrapper_name<<span class="lifetime">'a</span>> { |
| <span class="kw">fn </span>fmt(<span class="kw-2">&</span><span class="self">self</span>, f: <span class="kw-2">&mut </span>::core::fmt::Formatter) -> ::core::fmt::Result { |
| <span class="self">self</span>.<span class="number">0</span>.fmt(f) |
| } |
| } |
| }; |
| } |
| |
| <span class="kw">let </span>value = ty.rust_type(); |
| <span class="macro">quote! </span>{ |
| <span class="kw">struct </span>#wrapper_name<<span class="lifetime">'a</span>>(<span class="kw-2">&</span><span class="lifetime">'a </span>::#libname::collections::#type_name<#key, #value>); |
| <span class="kw">impl</span><<span class="lifetime">'a</span>> ::core::fmt::Debug <span class="kw">for </span>#wrapper_name<<span class="lifetime">'a</span>> { |
| #fmt |
| } |
| } |
| } |
| ValueTy::Message => <span class="macro">quote! </span>{ |
| <span class="kw">struct </span>#wrapper_name<<span class="lifetime">'a</span>, V: <span class="lifetime">'a</span>>(<span class="kw-2">&</span><span class="lifetime">'a </span>::#libname::collections::#type_name<#key, V>); |
| <span class="kw">impl</span><<span class="lifetime">'a</span>, V> ::core::fmt::Debug <span class="kw">for </span>#wrapper_name<<span class="lifetime">'a</span>, V> |
| <span class="kw">where |
| </span>V: ::core::fmt::Debug + <span class="lifetime">'a</span>, |
| { |
| #fmt |
| } |
| }, |
| } |
| } |
| } |
| |
| <span class="kw">fn </span>key_ty_from_str(s: <span class="kw-2">&</span>str) -> <span class="prelude-ty">Result</span><scalar::Ty, Error> { |
| <span class="kw">let </span>ty = scalar::Ty::from_str(s)<span class="question-mark">?</span>; |
| <span class="kw">match </span>ty { |
| scalar::Ty::Int32 |
| | scalar::Ty::Int64 |
| | scalar::Ty::Uint32 |
| | scalar::Ty::Uint64 |
| | scalar::Ty::Sint32 |
| | scalar::Ty::Sint64 |
| | scalar::Ty::Fixed32 |
| | scalar::Ty::Fixed64 |
| | scalar::Ty::Sfixed32 |
| | scalar::Ty::Sfixed64 |
| | scalar::Ty::Bool |
| | scalar::Ty::String => <span class="prelude-val">Ok</span>(ty), |
| <span class="kw">_ </span>=> <span class="macro">bail!</span>(<span class="string">"invalid map key type: {}"</span>, s), |
| } |
| } |
| |
| <span class="doccomment">/// A map value type. |
| </span><span class="attribute">#[derive(Clone, Debug, PartialEq, Eq)] |
| </span><span class="kw">pub enum </span>ValueTy { |
| Scalar(scalar::Ty), |
| Message, |
| } |
| |
| <span class="kw">impl </span>ValueTy { |
| <span class="kw">fn </span>from_str(s: <span class="kw-2">&</span>str) -> <span class="prelude-ty">Result</span><ValueTy, Error> { |
| <span class="kw">if let </span><span class="prelude-val">Ok</span>(ty) = scalar::Ty::from_str(s) { |
| <span class="prelude-val">Ok</span>(ValueTy::Scalar(ty)) |
| } <span class="kw">else if </span>s.trim() == <span class="string">"message" </span>{ |
| <span class="prelude-val">Ok</span>(ValueTy::Message) |
| } <span class="kw">else </span>{ |
| <span class="macro">bail!</span>(<span class="string">"invalid map value type: {}"</span>, s); |
| } |
| } |
| |
| <span class="doccomment">/// Returns a newtype wrapper around the ValueTy for nicer debug. |
| /// |
| /// If the contained value is enumeration, it tries to convert it to the variant. If not, it |
| /// just forwards the implementation. |
| </span><span class="kw">fn </span>debug(<span class="kw-2">&</span><span class="self">self</span>) -> TokenStream { |
| <span class="kw">match </span><span class="self">self </span>{ |
| ValueTy::Scalar(ty) => fake_scalar(ty.clone()).debug(<span class="macro">quote!</span>(ValueWrapper)), |
| ValueTy::Message => <span class="macro">quote!</span>( |
| <span class="kw">fn </span>ValueWrapper<T>(v: T) -> T { |
| v |
| } |
| ), |
| } |
| } |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../../" data-current-crate="prost_derive" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |
