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RPM build fix (reverted CI changes which will need to be un-reverted or made conditional) and vendor Rust dependencies to make builds much faster in any CI system.

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This commit is contained in:
Adam Ierymenko
2022-06-08 07:32:16 -04:00
parent 373ca30269
commit d5ca4e5f52
12611 changed files with 2898014 additions and 284 deletions
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# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO
#
# When uploading crates to the registry Cargo will automatically
# "normalize" Cargo.toml files for maximal compatibility
# with all versions of Cargo and also rewrite `path` dependencies
# to registry (e.g., crates.io) dependencies.
#
# If you are reading this file be aware that the original Cargo.toml
# will likely look very different (and much more reasonable).
# See Cargo.toml.orig for the original contents.
[package]
rust-version = "1.31"
name = "serde_derive"
version = "1.0.137"
authors = [
"Erick Tryzelaar <erick.tryzelaar@gmail.com>",
"David Tolnay <dtolnay@gmail.com>",
]
include = [
"build.rs",
"src/**/*.rs",
"crates-io.md",
"README.md",
"LICENSE-APACHE",
"LICENSE-MIT",
]
description = "Macros 1.1 implementation of #[derive(Serialize, Deserialize)]"
homepage = "https://serde.rs"
documentation = "https://serde.rs/derive.html"
readme = "crates-io.md"
keywords = [
"serde",
"serialization",
"no_std",
]
license = "MIT OR Apache-2.0"
repository = "https://github.com/serde-rs/serde"
[package.metadata.docs.rs]
targets = ["x86_64-unknown-linux-gnu"]
[lib]
name = "serde_derive"
proc-macro = true
[dependencies.proc-macro2]
version = "1.0"
[dependencies.quote]
version = "1.0"
[dependencies.syn]
version = "1.0.90"
[dev-dependencies.serde]
version = "1.0"
[features]
default = []
deserialize_in_place = []

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Apache License
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Permission is hereby granted, free of charge, to any
person obtaining a copy of this software and associated
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# Serde &emsp; [![Build Status]][actions] [![Latest Version]][crates.io] [![serde: rustc 1.13+]][Rust 1.13] [![serde_derive: rustc 1.31+]][Rust 1.31]
[Build Status]: https://img.shields.io/github/workflow/status/serde-rs/serde/CI/master
[actions]: https://github.com/serde-rs/serde/actions?query=branch%3Amaster
[Latest Version]: https://img.shields.io/crates/v/serde.svg
[crates.io]: https://crates.io/crates/serde
[serde: rustc 1.13+]: https://img.shields.io/badge/serde-rustc_1.13+-lightgray.svg
[serde_derive: rustc 1.31+]: https://img.shields.io/badge/serde_derive-rustc_1.31+-lightgray.svg
[Rust 1.13]: https://blog.rust-lang.org/2016/11/10/Rust-1.13.html
[Rust 1.31]: https://blog.rust-lang.org/2018/12/06/Rust-1.31-and-rust-2018.html
**Serde is a framework for *ser*ializing and *de*serializing Rust data structures efficiently and generically.**
---
You may be looking for:
- [An overview of Serde](https://serde.rs/)
- [Data formats supported by Serde](https://serde.rs/#data-formats)
- [Setting up `#[derive(Serialize, Deserialize)]`](https://serde.rs/derive.html)
- [Examples](https://serde.rs/examples.html)
- [API documentation](https://docs.serde.rs/serde/)
- [Release notes](https://github.com/serde-rs/serde/releases)
## Serde in action
<details>
<summary>
Click to show Cargo.toml.
<a href="https://play.rust-lang.org/?edition=2018&gist=72755f28f99afc95e01d63174b28c1f5" target="_blank">Run this code in the playground.</a>
</summary>
```toml
[dependencies]
# The core APIs, including the Serialize and Deserialize traits. Always
# required when using Serde. The "derive" feature is only required when
# using #[derive(Serialize, Deserialize)] to make Serde work with structs
# and enums defined in your crate.
serde = { version = "1.0", features = ["derive"] }
# Each data format lives in its own crate; the sample code below uses JSON
# but you may be using a different one.
serde_json = "1.0"
```
</details>
<p></p>
```rust
use serde::{Serialize, Deserialize};
#[derive(Serialize, Deserialize, Debug)]
struct Point {
x: i32,
y: i32,
}
fn main() {
let point = Point { x: 1, y: 2 };
// Convert the Point to a JSON string.
let serialized = serde_json::to_string(&point).unwrap();
// Prints serialized = {"x":1,"y":2}
println!("serialized = {}", serialized);
// Convert the JSON string back to a Point.
let deserialized: Point = serde_json::from_str(&serialized).unwrap();
// Prints deserialized = Point { x: 1, y: 2 }
println!("deserialized = {:?}", deserialized);
}
```
## Getting help
Serde is one of the most widely used Rust libraries so any place that Rustaceans
congregate will be able to help you out. For chat, consider trying the
[#rust-questions] or [#rust-beginners] channels of the unofficial community
Discord (invite: <https://discord.gg/rust-lang-community>), the [#rust-usage] or
[#beginners] channels of the official Rust Project Discord (invite:
<https://discord.gg/rust-lang>), or the [#general][zulip] stream in Zulip. For
asynchronous, consider the [\[rust\] tag on StackOverflow][stackoverflow], the
[/r/rust] subreddit which has a pinned weekly easy questions post, or the Rust
[Discourse forum][discourse]. It's acceptable to file a support issue in this
repo but they tend not to get as many eyes as any of the above and may get
closed without a response after some time.
[#rust-questions]: https://discord.com/channels/273534239310479360/274215136414400513
[#rust-beginners]: https://discord.com/channels/273534239310479360/273541522815713281
[#rust-usage]: https://discord.com/channels/442252698964721669/443150878111694848
[#beginners]: https://discord.com/channels/442252698964721669/448238009733742612
[zulip]: https://rust-lang.zulipchat.com/#narrow/stream/122651-general
[stackoverflow]: https://stackoverflow.com/questions/tagged/rust
[/r/rust]: https://www.reddit.com/r/rust
[discourse]: https://users.rust-lang.org
<br>
#### License
<sup>
Licensed under either of <a href="LICENSE-APACHE">Apache License, Version
2.0</a> or <a href="LICENSE-MIT">MIT license</a> at your option.
</sup>
<br>
<sub>
Unless you explicitly state otherwise, any contribution intentionally submitted
for inclusion in Serde by you, as defined in the Apache-2.0 license, shall be
dual licensed as above, without any additional terms or conditions.
</sub>

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use std::env;
use std::process::Command;
use std::str;
// The rustc-cfg strings below are *not* public API. Please let us know by
// opening a GitHub issue if your build environment requires some way to enable
// these cfgs other than by executing our build script.
fn main() {
let minor = match rustc_minor_version() {
Some(minor) => minor,
None => return,
};
// Underscore const names stabilized in Rust 1.37:
// https://blog.rust-lang.org/2019/08/15/Rust-1.37.0.html#using-unnamed-const-items-for-macros
if minor >= 37 {
println!("cargo:rustc-cfg=underscore_consts");
}
// The ptr::addr_of! macro stabilized in Rust 1.51:
// https://blog.rust-lang.org/2021/03/25/Rust-1.51.0.html#stabilized-apis
if minor >= 51 {
println!("cargo:rustc-cfg=ptr_addr_of");
}
}
fn rustc_minor_version() -> Option<u32> {
let rustc = env::var_os("RUSTC")?;
let output = Command::new(rustc).arg("--version").output().ok()?;
let version = str::from_utf8(&output.stdout).ok()?;
let mut pieces = version.split('.');
if pieces.next() != Some("rustc 1") {
return None;
}
pieces.next()?.parse().ok()
}

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<!-- Serde readme rendered on crates.io -->
**Serde is a framework for *ser*ializing and *de*serializing Rust data structures efficiently and generically.**
---
You may be looking for:
- [An overview of Serde](https://serde.rs/)
- [Data formats supported by Serde](https://serde.rs/#data-formats)
- [Setting up `#[derive(Serialize, Deserialize)]`](https://serde.rs/derive.html)
- [Examples](https://serde.rs/examples.html)
- [API documentation](https://docs.serde.rs/serde/)
- [Release notes](https://github.com/serde-rs/serde/releases)
## Serde in action
```rust
use serde::{Serialize, Deserialize};
#[derive(Serialize, Deserialize, Debug)]
struct Point {
x: i32,
y: i32,
}
fn main() {
let point = Point { x: 1, y: 2 };
// Convert the Point to a JSON string.
let serialized = serde_json::to_string(&point).unwrap();
// Prints serialized = {"x":1,"y":2}
println!("serialized = {}", serialized);
// Convert the JSON string back to a Point.
let deserialized: Point = serde_json::from_str(&serialized).unwrap();
// Prints deserialized = Point { x: 1, y: 2 }
println!("deserialized = {:?}", deserialized);
}
```
## Getting help
Serde is one of the most widely used Rust libraries so any place that Rustaceans
congregate will be able to help you out. For chat, consider trying the
[#rust-questions] or [#rust-beginners] channels of the unofficial community
Discord (invite: <https://discord.gg/rust-lang-community>, the [#rust-usage] or
[#beginners] channels of the official Rust Project Discord (invite:
<https://discord.gg/rust-lang>), or the [#general][zulip] stream in Zulip. For
asynchronous, consider the [\[rust\] tag on StackOverflow][stackoverflow], the
[/r/rust] subreddit which has a pinned weekly easy questions post, or the Rust
[Discourse forum][discourse]. It's acceptable to file a support issue in this
repo but they tend not to get as many eyes as any of the above and may get
closed without a response after some time.
[#rust-questions]: https://discord.com/channels/273534239310479360/274215136414400513
[#rust-beginners]: https://discord.com/channels/273534239310479360/273541522815713281
[#rust-usage]: https://discord.com/channels/442252698964721669/443150878111694848
[#beginners]: https://discord.com/channels/442252698964721669/448238009733742612
[zulip]: https://rust-lang.zulipchat.com/#narrow/stream/122651-general
[stackoverflow]: https://stackoverflow.com/questions/tagged/rust
[/r/rust]: https://www.reddit.com/r/rust
[discourse]: https://users.rust-lang.org

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use std::collections::HashSet;
use syn;
use syn::punctuated::{Pair, Punctuated};
use internals::ast::{Container, Data};
use internals::{attr, ungroup};
use proc_macro2::Span;
// Remove the default from every type parameter because in the generated impls
// they look like associated types: "error: associated type bindings are not
// allowed here".
pub fn without_defaults(generics: &syn::Generics) -> syn::Generics {
syn::Generics {
params: generics
.params
.iter()
.map(|param| match param {
syn::GenericParam::Type(param) => syn::GenericParam::Type(syn::TypeParam {
eq_token: None,
default: None,
..param.clone()
}),
_ => param.clone(),
})
.collect(),
..generics.clone()
}
}
pub fn with_where_predicates(
generics: &syn::Generics,
predicates: &[syn::WherePredicate],
) -> syn::Generics {
let mut generics = generics.clone();
generics
.make_where_clause()
.predicates
.extend(predicates.iter().cloned());
generics
}
pub fn with_where_predicates_from_fields(
cont: &Container,
generics: &syn::Generics,
from_field: fn(&attr::Field) -> Option<&[syn::WherePredicate]>,
) -> syn::Generics {
let predicates = cont
.data
.all_fields()
.filter_map(|field| from_field(&field.attrs))
.flat_map(<[syn::WherePredicate]>::to_vec);
let mut generics = generics.clone();
generics.make_where_clause().predicates.extend(predicates);
generics
}
pub fn with_where_predicates_from_variants(
cont: &Container,
generics: &syn::Generics,
from_variant: fn(&attr::Variant) -> Option<&[syn::WherePredicate]>,
) -> syn::Generics {
let variants = match &cont.data {
Data::Enum(variants) => variants,
Data::Struct(_, _) => {
return generics.clone();
}
};
let predicates = variants
.iter()
.filter_map(|variant| from_variant(&variant.attrs))
.flat_map(<[syn::WherePredicate]>::to_vec);
let mut generics = generics.clone();
generics.make_where_clause().predicates.extend(predicates);
generics
}
// Puts the given bound on any generic type parameters that are used in fields
// for which filter returns true.
//
// For example, the following struct needs the bound `A: Serialize, B:
// Serialize`.
//
// struct S<'b, A, B: 'b, C> {
// a: A,
// b: Option<&'b B>
// #[serde(skip_serializing)]
// c: C,
// }
pub fn with_bound(
cont: &Container,
generics: &syn::Generics,
filter: fn(&attr::Field, Option<&attr::Variant>) -> bool,
bound: &syn::Path,
) -> syn::Generics {
struct FindTyParams<'ast> {
// Set of all generic type parameters on the current struct (A, B, C in
// the example). Initialized up front.
all_type_params: HashSet<syn::Ident>,
// Set of generic type parameters used in fields for which filter
// returns true (A and B in the example). Filled in as the visitor sees
// them.
relevant_type_params: HashSet<syn::Ident>,
// Fields whose type is an associated type of one of the generic type
// parameters.
associated_type_usage: Vec<&'ast syn::TypePath>,
}
impl<'ast> FindTyParams<'ast> {
fn visit_field(&mut self, field: &'ast syn::Field) {
if let syn::Type::Path(ty) = ungroup(&field.ty) {
if let Some(Pair::Punctuated(t, _)) = ty.path.segments.pairs().next() {
if self.all_type_params.contains(&t.ident) {
self.associated_type_usage.push(ty);
}
}
}
self.visit_type(&field.ty);
}
fn visit_path(&mut self, path: &'ast syn::Path) {
if let Some(seg) = path.segments.last() {
if seg.ident == "PhantomData" {
// Hardcoded exception, because PhantomData<T> implements
// Serialize and Deserialize whether or not T implements it.
return;
}
}
if path.leading_colon.is_none() && path.segments.len() == 1 {
let id = &path.segments[0].ident;
if self.all_type_params.contains(id) {
self.relevant_type_params.insert(id.clone());
}
}
for segment in &path.segments {
self.visit_path_segment(segment);
}
}
// Everything below is simply traversing the syntax tree.
fn visit_type(&mut self, ty: &'ast syn::Type) {
match ty {
syn::Type::Array(ty) => self.visit_type(&ty.elem),
syn::Type::BareFn(ty) => {
for arg in &ty.inputs {
self.visit_type(&arg.ty);
}
self.visit_return_type(&ty.output);
}
syn::Type::Group(ty) => self.visit_type(&ty.elem),
syn::Type::ImplTrait(ty) => {
for bound in &ty.bounds {
self.visit_type_param_bound(bound);
}
}
syn::Type::Macro(ty) => self.visit_macro(&ty.mac),
syn::Type::Paren(ty) => self.visit_type(&ty.elem),
syn::Type::Path(ty) => {
if let Some(qself) = &ty.qself {
self.visit_type(&qself.ty);
}
self.visit_path(&ty.path);
}
syn::Type::Ptr(ty) => self.visit_type(&ty.elem),
syn::Type::Reference(ty) => self.visit_type(&ty.elem),
syn::Type::Slice(ty) => self.visit_type(&ty.elem),
syn::Type::TraitObject(ty) => {
for bound in &ty.bounds {
self.visit_type_param_bound(bound);
}
}
syn::Type::Tuple(ty) => {
for elem in &ty.elems {
self.visit_type(elem);
}
}
syn::Type::Infer(_) | syn::Type::Never(_) | syn::Type::Verbatim(_) => {}
#[cfg_attr(all(test, exhaustive), deny(non_exhaustive_omitted_patterns))]
_ => {}
}
}
fn visit_path_segment(&mut self, segment: &'ast syn::PathSegment) {
self.visit_path_arguments(&segment.arguments);
}
fn visit_path_arguments(&mut self, arguments: &'ast syn::PathArguments) {
match arguments {
syn::PathArguments::None => {}
syn::PathArguments::AngleBracketed(arguments) => {
for arg in &arguments.args {
match arg {
syn::GenericArgument::Type(arg) => self.visit_type(arg),
syn::GenericArgument::Binding(arg) => self.visit_type(&arg.ty),
syn::GenericArgument::Lifetime(_)
| syn::GenericArgument::Constraint(_)
| syn::GenericArgument::Const(_) => {}
}
}
}
syn::PathArguments::Parenthesized(arguments) => {
for argument in &arguments.inputs {
self.visit_type(argument);
}
self.visit_return_type(&arguments.output);
}
}
}
fn visit_return_type(&mut self, return_type: &'ast syn::ReturnType) {
match return_type {
syn::ReturnType::Default => {}
syn::ReturnType::Type(_, output) => self.visit_type(output),
}
}
fn visit_type_param_bound(&mut self, bound: &'ast syn::TypeParamBound) {
match bound {
syn::TypeParamBound::Trait(bound) => self.visit_path(&bound.path),
syn::TypeParamBound::Lifetime(_) => {}
}
}
// Type parameter should not be considered used by a macro path.
//
// struct TypeMacro<T> {
// mac: T!(),
// marker: PhantomData<T>,
// }
fn visit_macro(&mut self, _mac: &'ast syn::Macro) {}
}
let all_type_params = generics
.type_params()
.map(|param| param.ident.clone())
.collect();
let mut visitor = FindTyParams {
all_type_params,
relevant_type_params: HashSet::new(),
associated_type_usage: Vec::new(),
};
match &cont.data {
Data::Enum(variants) => {
for variant in variants.iter() {
let relevant_fields = variant
.fields
.iter()
.filter(|field| filter(&field.attrs, Some(&variant.attrs)));
for field in relevant_fields {
visitor.visit_field(field.original);
}
}
}
Data::Struct(_, fields) => {
for field in fields.iter().filter(|field| filter(&field.attrs, None)) {
visitor.visit_field(field.original);
}
}
}
let relevant_type_params = visitor.relevant_type_params;
let associated_type_usage = visitor.associated_type_usage;
let new_predicates = generics
.type_params()
.map(|param| param.ident.clone())
.filter(|id| relevant_type_params.contains(id))
.map(|id| syn::TypePath {
qself: None,
path: id.into(),
})
.chain(associated_type_usage.into_iter().cloned())
.map(|bounded_ty| {
syn::WherePredicate::Type(syn::PredicateType {
lifetimes: None,
// the type parameter that is being bounded e.g. T
bounded_ty: syn::Type::Path(bounded_ty),
colon_token: <Token![:]>::default(),
// the bound e.g. Serialize
bounds: vec![syn::TypeParamBound::Trait(syn::TraitBound {
paren_token: None,
modifier: syn::TraitBoundModifier::None,
lifetimes: None,
path: bound.clone(),
})]
.into_iter()
.collect(),
})
});
let mut generics = generics.clone();
generics
.make_where_clause()
.predicates
.extend(new_predicates);
generics
}
pub fn with_self_bound(
cont: &Container,
generics: &syn::Generics,
bound: &syn::Path,
) -> syn::Generics {
let mut generics = generics.clone();
generics
.make_where_clause()
.predicates
.push(syn::WherePredicate::Type(syn::PredicateType {
lifetimes: None,
// the type that is being bounded e.g. MyStruct<'a, T>
bounded_ty: type_of_item(cont),
colon_token: <Token![:]>::default(),
// the bound e.g. Default
bounds: vec![syn::TypeParamBound::Trait(syn::TraitBound {
paren_token: None,
modifier: syn::TraitBoundModifier::None,
lifetimes: None,
path: bound.clone(),
})]
.into_iter()
.collect(),
}));
generics
}
pub fn with_lifetime_bound(generics: &syn::Generics, lifetime: &str) -> syn::Generics {
let bound = syn::Lifetime::new(lifetime, Span::call_site());
let def = syn::LifetimeDef {
attrs: Vec::new(),
lifetime: bound.clone(),
colon_token: None,
bounds: Punctuated::new(),
};
let params = Some(syn::GenericParam::Lifetime(def))
.into_iter()
.chain(generics.params.iter().cloned().map(|mut param| {
match &mut param {
syn::GenericParam::Lifetime(param) => {
param.bounds.push(bound.clone());
}
syn::GenericParam::Type(param) => {
param
.bounds
.push(syn::TypeParamBound::Lifetime(bound.clone()));
}
syn::GenericParam::Const(_) => {}
}
param
}))
.collect();
syn::Generics {
params,
..generics.clone()
}
}
fn type_of_item(cont: &Container) -> syn::Type {
syn::Type::Path(syn::TypePath {
qself: None,
path: syn::Path {
leading_colon: None,
segments: vec![syn::PathSegment {
ident: cont.ident.clone(),
arguments: syn::PathArguments::AngleBracketed(
syn::AngleBracketedGenericArguments {
colon2_token: None,
lt_token: <Token![<]>::default(),
args: cont
.generics
.params
.iter()
.map(|param| match param {
syn::GenericParam::Type(param) => {
syn::GenericArgument::Type(syn::Type::Path(syn::TypePath {
qself: None,
path: param.ident.clone().into(),
}))
}
syn::GenericParam::Lifetime(param) => {
syn::GenericArgument::Lifetime(param.lifetime.clone())
}
syn::GenericParam::Const(_) => {
panic!("Serde does not support const generics yet");
}
})
.collect(),
gt_token: <Token![>]>::default(),
},
),
}]
.into_iter()
.collect(),
},
})
}

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use proc_macro2::{Ident, TokenStream};
use quote::format_ident;
use syn;
use try;
pub fn wrap_in_const(
serde_path: Option<&syn::Path>,
trait_: &str,
ty: &Ident,
code: TokenStream,
) -> TokenStream {
let try_replacement = try::replacement();
let dummy_const = if cfg!(underscore_consts) {
format_ident!("_")
} else {
format_ident!("_IMPL_{}_FOR_{}", trait_, unraw(ty))
};
let use_serde = match serde_path {
Some(path) => quote! {
use #path as _serde;
},
None => quote! {
#[allow(unused_extern_crates, clippy::useless_attribute)]
extern crate serde as _serde;
},
};
quote! {
#[doc(hidden)]
#[allow(non_upper_case_globals, unused_attributes, unused_qualifications)]
const #dummy_const: () = {
#use_serde
#try_replacement
#code
};
}
}
#[allow(deprecated)]
fn unraw(ident: &Ident) -> String {
// str::trim_start_matches was added in 1.30, trim_left_matches deprecated
// in 1.33. We currently support rustc back to 1.15 so we need to continue
// to use the deprecated one.
ident.to_string().trim_left_matches("r#").to_owned()
}

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use proc_macro2::TokenStream;
use quote::ToTokens;
use syn::token;
pub enum Fragment {
/// Tokens that can be used as an expression.
Expr(TokenStream),
/// Tokens that can be used inside a block. The surrounding curly braces are
/// not part of these tokens.
Block(TokenStream),
}
macro_rules! quote_expr {
($($tt:tt)*) => {
$crate::fragment::Fragment::Expr(quote!($($tt)*))
}
}
macro_rules! quote_block {
($($tt:tt)*) => {
$crate::fragment::Fragment::Block(quote!($($tt)*))
}
}
/// Interpolate a fragment in place of an expression. This involves surrounding
/// Block fragments in curly braces.
pub struct Expr(pub Fragment);
impl ToTokens for Expr {
fn to_tokens(&self, out: &mut TokenStream) {
match &self.0 {
Fragment::Expr(expr) => expr.to_tokens(out),
Fragment::Block(block) => {
token::Brace::default().surround(out, |out| block.to_tokens(out));
}
}
}
}
/// Interpolate a fragment as the statements of a block.
pub struct Stmts(pub Fragment);
impl ToTokens for Stmts {
fn to_tokens(&self, out: &mut TokenStream) {
match &self.0 {
Fragment::Expr(expr) => expr.to_tokens(out),
Fragment::Block(block) => block.to_tokens(out),
}
}
}
/// Interpolate a fragment as the value part of a `match` expression. This
/// involves putting a comma after expressions and curly braces around blocks.
pub struct Match(pub Fragment);
impl ToTokens for Match {
fn to_tokens(&self, out: &mut TokenStream) {
match &self.0 {
Fragment::Expr(expr) => {
expr.to_tokens(out);
<Token![,]>::default().to_tokens(out);
}
Fragment::Block(block) => {
token::Brace::default().surround(out, |out| block.to_tokens(out));
}
}
}
}
impl AsRef<TokenStream> for Fragment {
fn as_ref(&self) -> &TokenStream {
match self {
Fragment::Expr(expr) => expr,
Fragment::Block(block) => block,
}
}
}

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//! A Serde ast, parsed from the Syn ast and ready to generate Rust code.
use internals::attr;
use internals::check;
use internals::{Ctxt, Derive};
use syn;
use syn::punctuated::Punctuated;
/// A source data structure annotated with `#[derive(Serialize)]` and/or `#[derive(Deserialize)]`,
/// parsed into an internal representation.
pub struct Container<'a> {
/// The struct or enum name (without generics).
pub ident: syn::Ident,
/// Attributes on the structure, parsed for Serde.
pub attrs: attr::Container,
/// The contents of the struct or enum.
pub data: Data<'a>,
/// Any generics on the struct or enum.
pub generics: &'a syn::Generics,
/// Original input.
pub original: &'a syn::DeriveInput,
}
/// The fields of a struct or enum.
///
/// Analogous to `syn::Data`.
pub enum Data<'a> {
Enum(Vec<Variant<'a>>),
Struct(Style, Vec<Field<'a>>),
}
/// A variant of an enum.
pub struct Variant<'a> {
pub ident: syn::Ident,
pub attrs: attr::Variant,
pub style: Style,
pub fields: Vec<Field<'a>>,
pub original: &'a syn::Variant,
}
/// A field of a struct.
pub struct Field<'a> {
pub member: syn::Member,
pub attrs: attr::Field,
pub ty: &'a syn::Type,
pub original: &'a syn::Field,
}
#[derive(Copy, Clone)]
pub enum Style {
/// Named fields.
Struct,
/// Many unnamed fields.
Tuple,
/// One unnamed field.
Newtype,
/// No fields.
Unit,
}
impl<'a> Container<'a> {
/// Convert the raw Syn ast into a parsed container object, collecting errors in `cx`.
pub fn from_ast(
cx: &Ctxt,
item: &'a syn::DeriveInput,
derive: Derive,
) -> Option<Container<'a>> {
let mut attrs = attr::Container::from_ast(cx, item);
let mut data = match &item.data {
syn::Data::Enum(data) => Data::Enum(enum_from_ast(cx, &data.variants, attrs.default())),
syn::Data::Struct(data) => {
let (style, fields) = struct_from_ast(cx, &data.fields, None, attrs.default());
Data::Struct(style, fields)
}
syn::Data::Union(_) => {
cx.error_spanned_by(item, "Serde does not support derive for unions");
return None;
}
};
let mut has_flatten = false;
match &mut data {
Data::Enum(variants) => {
for variant in variants {
variant.attrs.rename_by_rules(attrs.rename_all_rules());
for field in &mut variant.fields {
if field.attrs.flatten() {
has_flatten = true;
}
field
.attrs
.rename_by_rules(variant.attrs.rename_all_rules());
}
}
}
Data::Struct(_, fields) => {
for field in fields {
if field.attrs.flatten() {
has_flatten = true;
}
field.attrs.rename_by_rules(attrs.rename_all_rules());
}
}
}
if has_flatten {
attrs.mark_has_flatten();
}
let mut item = Container {
ident: item.ident.clone(),
attrs,
data,
generics: &item.generics,
original: item,
};
check::check(cx, &mut item, derive);
Some(item)
}
}
impl<'a> Data<'a> {
pub fn all_fields(&'a self) -> Box<Iterator<Item = &'a Field<'a>> + 'a> {
match self {
Data::Enum(variants) => {
Box::new(variants.iter().flat_map(|variant| variant.fields.iter()))
}
Data::Struct(_, fields) => Box::new(fields.iter()),
}
}
pub fn has_getter(&self) -> bool {
self.all_fields().any(|f| f.attrs.getter().is_some())
}
}
fn enum_from_ast<'a>(
cx: &Ctxt,
variants: &'a Punctuated<syn::Variant, Token![,]>,
container_default: &attr::Default,
) -> Vec<Variant<'a>> {
variants
.iter()
.map(|variant| {
let attrs = attr::Variant::from_ast(cx, variant);
let (style, fields) =
struct_from_ast(cx, &variant.fields, Some(&attrs), container_default);
Variant {
ident: variant.ident.clone(),
attrs,
style,
fields,
original: variant,
}
})
.collect()
}
fn struct_from_ast<'a>(
cx: &Ctxt,
fields: &'a syn::Fields,
attrs: Option<&attr::Variant>,
container_default: &attr::Default,
) -> (Style, Vec<Field<'a>>) {
match fields {
syn::Fields::Named(fields) => (
Style::Struct,
fields_from_ast(cx, &fields.named, attrs, container_default),
),
syn::Fields::Unnamed(fields) if fields.unnamed.len() == 1 => (
Style::Newtype,
fields_from_ast(cx, &fields.unnamed, attrs, container_default),
),
syn::Fields::Unnamed(fields) => (
Style::Tuple,
fields_from_ast(cx, &fields.unnamed, attrs, container_default),
),
syn::Fields::Unit => (Style::Unit, Vec::new()),
}
}
fn fields_from_ast<'a>(
cx: &Ctxt,
fields: &'a Punctuated<syn::Field, Token![,]>,
attrs: Option<&attr::Variant>,
container_default: &attr::Default,
) -> Vec<Field<'a>> {
fields
.iter()
.enumerate()
.map(|(i, field)| Field {
member: match &field.ident {
Some(ident) => syn::Member::Named(ident.clone()),
None => syn::Member::Unnamed(i.into()),
},
attrs: attr::Field::from_ast(cx, i, field, attrs, container_default),
ty: &field.ty,
original: field,
})
.collect()
}

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//! Code to convert the Rust-styled field/variant (e.g. `my_field`, `MyType`) to the
//! case of the source (e.g. `my-field`, `MY_FIELD`).
// See https://users.rust-lang.org/t/psa-dealing-with-warning-unused-import-std-ascii-asciiext-in-today-s-nightly/13726
#[allow(deprecated, unused_imports)]
use std::ascii::AsciiExt;
use std::fmt::{self, Debug, Display};
use self::RenameRule::*;
/// The different possible ways to change case of fields in a struct, or variants in an enum.
#[derive(Copy, Clone, PartialEq)]
pub enum RenameRule {
/// Don't apply a default rename rule.
None,
/// Rename direct children to "lowercase" style.
LowerCase,
/// Rename direct children to "UPPERCASE" style.
UpperCase,
/// Rename direct children to "PascalCase" style, as typically used for
/// enum variants.
PascalCase,
/// Rename direct children to "camelCase" style.
CamelCase,
/// Rename direct children to "snake_case" style, as commonly used for
/// fields.
SnakeCase,
/// Rename direct children to "SCREAMING_SNAKE_CASE" style, as commonly
/// used for constants.
ScreamingSnakeCase,
/// Rename direct children to "kebab-case" style.
KebabCase,
/// Rename direct children to "SCREAMING-KEBAB-CASE" style.
ScreamingKebabCase,
}
static RENAME_RULES: &[(&str, RenameRule)] = &[
("lowercase", LowerCase),
("UPPERCASE", UpperCase),
("PascalCase", PascalCase),
("camelCase", CamelCase),
("snake_case", SnakeCase),
("SCREAMING_SNAKE_CASE", ScreamingSnakeCase),
("kebab-case", KebabCase),
("SCREAMING-KEBAB-CASE", ScreamingKebabCase),
];
impl RenameRule {
pub fn from_str(rename_all_str: &str) -> Result<Self, ParseError> {
for (name, rule) in RENAME_RULES {
if rename_all_str == *name {
return Ok(*rule);
}
}
Err(ParseError {
unknown: rename_all_str,
})
}
/// Apply a renaming rule to an enum variant, returning the version expected in the source.
pub fn apply_to_variant(&self, variant: &str) -> String {
match *self {
None | PascalCase => variant.to_owned(),
LowerCase => variant.to_ascii_lowercase(),
UpperCase => variant.to_ascii_uppercase(),
CamelCase => variant[..1].to_ascii_lowercase() + &variant[1..],
SnakeCase => {
let mut snake = String::new();
for (i, ch) in variant.char_indices() {
if i > 0 && ch.is_uppercase() {
snake.push('_');
}
snake.push(ch.to_ascii_lowercase());
}
snake
}
ScreamingSnakeCase => SnakeCase.apply_to_variant(variant).to_ascii_uppercase(),
KebabCase => SnakeCase.apply_to_variant(variant).replace('_', "-"),
ScreamingKebabCase => ScreamingSnakeCase
.apply_to_variant(variant)
.replace('_', "-"),
}
}
/// Apply a renaming rule to a struct field, returning the version expected in the source.
pub fn apply_to_field(&self, field: &str) -> String {
match *self {
None | LowerCase | SnakeCase => field.to_owned(),
UpperCase => field.to_ascii_uppercase(),
PascalCase => {
let mut pascal = String::new();
let mut capitalize = true;
for ch in field.chars() {
if ch == '_' {
capitalize = true;
} else if capitalize {
pascal.push(ch.to_ascii_uppercase());
capitalize = false;
} else {
pascal.push(ch);
}
}
pascal
}
CamelCase => {
let pascal = PascalCase.apply_to_field(field);
pascal[..1].to_ascii_lowercase() + &pascal[1..]
}
ScreamingSnakeCase => field.to_ascii_uppercase(),
KebabCase => field.replace('_', "-"),
ScreamingKebabCase => ScreamingSnakeCase.apply_to_field(field).replace('_', "-"),
}
}
}
pub struct ParseError<'a> {
unknown: &'a str,
}
impl<'a> Display for ParseError<'a> {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
f.write_str("unknown rename rule `rename_all = ")?;
Debug::fmt(self.unknown, f)?;
f.write_str("`, expected one of ")?;
for (i, (name, _rule)) in RENAME_RULES.iter().enumerate() {
if i > 0 {
f.write_str(", ")?;
}
Debug::fmt(name, f)?;
}
Ok(())
}
}
#[test]
fn rename_variants() {
for &(original, lower, upper, camel, snake, screaming, kebab, screaming_kebab) in &[
(
"Outcome", "outcome", "OUTCOME", "outcome", "outcome", "OUTCOME", "outcome", "OUTCOME",
),
(
"VeryTasty",
"verytasty",
"VERYTASTY",
"veryTasty",
"very_tasty",
"VERY_TASTY",
"very-tasty",
"VERY-TASTY",
),
("A", "a", "A", "a", "a", "A", "a", "A"),
("Z42", "z42", "Z42", "z42", "z42", "Z42", "z42", "Z42"),
] {
assert_eq!(None.apply_to_variant(original), original);
assert_eq!(LowerCase.apply_to_variant(original), lower);
assert_eq!(UpperCase.apply_to_variant(original), upper);
assert_eq!(PascalCase.apply_to_variant(original), original);
assert_eq!(CamelCase.apply_to_variant(original), camel);
assert_eq!(SnakeCase.apply_to_variant(original), snake);
assert_eq!(ScreamingSnakeCase.apply_to_variant(original), screaming);
assert_eq!(KebabCase.apply_to_variant(original), kebab);
assert_eq!(
ScreamingKebabCase.apply_to_variant(original),
screaming_kebab
);
}
}
#[test]
fn rename_fields() {
for &(original, upper, pascal, camel, screaming, kebab, screaming_kebab) in &[
(
"outcome", "OUTCOME", "Outcome", "outcome", "OUTCOME", "outcome", "OUTCOME",
),
(
"very_tasty",
"VERY_TASTY",
"VeryTasty",
"veryTasty",
"VERY_TASTY",
"very-tasty",
"VERY-TASTY",
),
("a", "A", "A", "a", "A", "a", "A"),
("z42", "Z42", "Z42", "z42", "Z42", "z42", "Z42"),
] {
assert_eq!(None.apply_to_field(original), original);
assert_eq!(UpperCase.apply_to_field(original), upper);
assert_eq!(PascalCase.apply_to_field(original), pascal);
assert_eq!(CamelCase.apply_to_field(original), camel);
assert_eq!(SnakeCase.apply_to_field(original), original);
assert_eq!(ScreamingSnakeCase.apply_to_field(original), screaming);
assert_eq!(KebabCase.apply_to_field(original), kebab);
assert_eq!(ScreamingKebabCase.apply_to_field(original), screaming_kebab);
}
}

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use internals::ast::{Container, Data, Field, Style};
use internals::attr::{Identifier, TagType};
use internals::{ungroup, Ctxt, Derive};
use syn::{Member, Type};
/// Cross-cutting checks that require looking at more than a single attrs
/// object. Simpler checks should happen when parsing and building the attrs.
pub fn check(cx: &Ctxt, cont: &mut Container, derive: Derive) {
check_getter(cx, cont);
check_flatten(cx, cont);
check_identifier(cx, cont);
check_variant_skip_attrs(cx, cont);
check_internal_tag_field_name_conflict(cx, cont);
check_adjacent_tag_conflict(cx, cont);
check_transparent(cx, cont, derive);
check_from_and_try_from(cx, cont);
}
/// Getters are only allowed inside structs (not enums) with the `remote`
/// attribute.
fn check_getter(cx: &Ctxt, cont: &Container) {
match cont.data {
Data::Enum(_) => {
if cont.data.has_getter() {
cx.error_spanned_by(
cont.original,
"#[serde(getter = \"...\")] is not allowed in an enum",
);
}
}
Data::Struct(_, _) => {
if cont.data.has_getter() && cont.attrs.remote().is_none() {
cx.error_spanned_by(
cont.original,
"#[serde(getter = \"...\")] can only be used in structs that have #[serde(remote = \"...\")]",
);
}
}
}
}
/// Flattening has some restrictions we can test.
fn check_flatten(cx: &Ctxt, cont: &Container) {
match &cont.data {
Data::Enum(variants) => {
for variant in variants {
for field in &variant.fields {
check_flatten_field(cx, variant.style, field);
}
}
}
Data::Struct(style, fields) => {
for field in fields {
check_flatten_field(cx, *style, field);
}
}
}
}
fn check_flatten_field(cx: &Ctxt, style: Style, field: &Field) {
if !field.attrs.flatten() {
return;
}
match style {
Style::Tuple => {
cx.error_spanned_by(
field.original,
"#[serde(flatten)] cannot be used on tuple structs",
);
}
Style::Newtype => {
cx.error_spanned_by(
field.original,
"#[serde(flatten)] cannot be used on newtype structs",
);
}
_ => {}
}
}
/// The `other` attribute must be used at most once and it must be the last
/// variant of an enum.
///
/// Inside a `variant_identifier` all variants must be unit variants. Inside a
/// `field_identifier` all but possibly one variant must be unit variants. The
/// last variant may be a newtype variant which is an implicit "other" case.
fn check_identifier(cx: &Ctxt, cont: &Container) {
let variants = match &cont.data {
Data::Enum(variants) => variants,
Data::Struct(_, _) => {
return;
}
};
for (i, variant) in variants.iter().enumerate() {
match (
variant.style,
cont.attrs.identifier(),
variant.attrs.other(),
cont.attrs.tag(),
) {
// The `other` attribute may not be used in a variant_identifier.
(_, Identifier::Variant, true, _) => {
cx.error_spanned_by(
variant.original,
"#[serde(other)] may not be used on a variant identifier",
);
}
// Variant with `other` attribute cannot appear in untagged enum
(_, Identifier::No, true, &TagType::None) => {
cx.error_spanned_by(
variant.original,
"#[serde(other)] cannot appear on untagged enum",
);
}
// Variant with `other` attribute must be the last one.
(Style::Unit, Identifier::Field, true, _) | (Style::Unit, Identifier::No, true, _) => {
if i < variants.len() - 1 {
cx.error_spanned_by(
variant.original,
"#[serde(other)] must be on the last variant",
);
}
}
// Variant with `other` attribute must be a unit variant.
(_, Identifier::Field, true, _) | (_, Identifier::No, true, _) => {
cx.error_spanned_by(
variant.original,
"#[serde(other)] must be on a unit variant",
);
}
// Any sort of variant is allowed if this is not an identifier.
(_, Identifier::No, false, _) => {}
// Unit variant without `other` attribute is always fine.
(Style::Unit, _, false, _) => {}
// The last field is allowed to be a newtype catch-all.
(Style::Newtype, Identifier::Field, false, _) => {
if i < variants.len() - 1 {
cx.error_spanned_by(
variant.original,
format!("`{}` must be the last variant", variant.ident),
);
}
}
(_, Identifier::Field, false, _) => {
cx.error_spanned_by(
variant.original,
"#[serde(field_identifier)] may only contain unit variants",
);
}
(_, Identifier::Variant, false, _) => {
cx.error_spanned_by(
variant.original,
"#[serde(variant_identifier)] may only contain unit variants",
);
}
}
}
}
/// Skip-(de)serializing attributes are not allowed on variants marked
/// (de)serialize_with.
fn check_variant_skip_attrs(cx: &Ctxt, cont: &Container) {
let variants = match &cont.data {
Data::Enum(variants) => variants,
Data::Struct(_, _) => {
return;
}
};
for variant in variants.iter() {
if variant.attrs.serialize_with().is_some() {
if variant.attrs.skip_serializing() {
cx.error_spanned_by(
variant.original,
format!(
"variant `{}` cannot have both #[serde(serialize_with)] and #[serde(skip_serializing)]",
variant.ident
),
);
}
for field in &variant.fields {
let member = member_message(&field.member);
if field.attrs.skip_serializing() {
cx.error_spanned_by(
variant.original,
format!(
"variant `{}` cannot have both #[serde(serialize_with)] and a field {} marked with #[serde(skip_serializing)]",
variant.ident, member
),
);
}
if field.attrs.skip_serializing_if().is_some() {
cx.error_spanned_by(
variant.original,
format!(
"variant `{}` cannot have both #[serde(serialize_with)] and a field {} marked with #[serde(skip_serializing_if)]",
variant.ident, member
),
);
}
}
}
if variant.attrs.deserialize_with().is_some() {
if variant.attrs.skip_deserializing() {
cx.error_spanned_by(
variant.original,
format!(
"variant `{}` cannot have both #[serde(deserialize_with)] and #[serde(skip_deserializing)]",
variant.ident
),
);
}
for field in &variant.fields {
if field.attrs.skip_deserializing() {
let member = member_message(&field.member);
cx.error_spanned_by(
variant.original,
format!(
"variant `{}` cannot have both #[serde(deserialize_with)] and a field {} marked with #[serde(skip_deserializing)]",
variant.ident, member
),
);
}
}
}
}
}
/// The tag of an internally-tagged struct variant must not be
/// the same as either one of its fields, as this would result in
/// duplicate keys in the serialized output and/or ambiguity in
/// the to-be-deserialized input.
fn check_internal_tag_field_name_conflict(cx: &Ctxt, cont: &Container) {
let variants = match &cont.data {
Data::Enum(variants) => variants,
Data::Struct(_, _) => return,
};
let tag = match cont.attrs.tag() {
TagType::Internal { tag } => tag.as_str(),
TagType::External | TagType::Adjacent { .. } | TagType::None => return,
};
let diagnose_conflict = || {
cx.error_spanned_by(
cont.original,
format!("variant field name `{}` conflicts with internal tag", tag),
);
};
for variant in variants {
match variant.style {
Style::Struct => {
for field in &variant.fields {
let check_ser = !field.attrs.skip_serializing();
let check_de = !field.attrs.skip_deserializing();
let name = field.attrs.name();
let ser_name = name.serialize_name();
if check_ser && ser_name == tag {
diagnose_conflict();
return;
}
for de_name in field.attrs.aliases() {
if check_de && de_name == tag {
diagnose_conflict();
return;
}
}
}
}
Style::Unit | Style::Newtype | Style::Tuple => {}
}
}
}
/// In the case of adjacently-tagged enums, the type and the
/// contents tag must differ, for the same reason.
fn check_adjacent_tag_conflict(cx: &Ctxt, cont: &Container) {
let (type_tag, content_tag) = match cont.attrs.tag() {
TagType::Adjacent { tag, content } => (tag, content),
TagType::Internal { .. } | TagType::External | TagType::None => return,
};
if type_tag == content_tag {
cx.error_spanned_by(
cont.original,
format!(
"enum tags `{}` for type and content conflict with each other",
type_tag
),
);
}
}
/// Enums and unit structs cannot be transparent.
fn check_transparent(cx: &Ctxt, cont: &mut Container, derive: Derive) {
if !cont.attrs.transparent() {
return;
}
if cont.attrs.type_from().is_some() {
cx.error_spanned_by(
cont.original,
"#[serde(transparent)] is not allowed with #[serde(from = \"...\")]",
);
}
if cont.attrs.type_try_from().is_some() {
cx.error_spanned_by(
cont.original,
"#[serde(transparent)] is not allowed with #[serde(try_from = \"...\")]",
);
}
if cont.attrs.type_into().is_some() {
cx.error_spanned_by(
cont.original,
"#[serde(transparent)] is not allowed with #[serde(into = \"...\")]",
);
}
let fields = match &mut cont.data {
Data::Enum(_) => {
cx.error_spanned_by(
cont.original,
"#[serde(transparent)] is not allowed on an enum",
);
return;
}
Data::Struct(Style::Unit, _) => {
cx.error_spanned_by(
cont.original,
"#[serde(transparent)] is not allowed on a unit struct",
);
return;
}
Data::Struct(_, fields) => fields,
};
let mut transparent_field = None;
for field in fields {
if allow_transparent(field, derive) {
if transparent_field.is_some() {
cx.error_spanned_by(
cont.original,
"#[serde(transparent)] requires struct to have at most one transparent field",
);
return;
}
transparent_field = Some(field);
}
}
match transparent_field {
Some(transparent_field) => transparent_field.attrs.mark_transparent(),
None => match derive {
Derive::Serialize => {
cx.error_spanned_by(
cont.original,
"#[serde(transparent)] requires at least one field that is not skipped",
);
}
Derive::Deserialize => {
cx.error_spanned_by(
cont.original,
"#[serde(transparent)] requires at least one field that is neither skipped nor has a default",
);
}
},
}
}
fn member_message(member: &Member) -> String {
match member {
Member::Named(ident) => format!("`{}`", ident),
Member::Unnamed(i) => format!("#{}", i.index),
}
}
fn allow_transparent(field: &Field, derive: Derive) -> bool {
if let Type::Path(ty) = ungroup(field.ty) {
if let Some(seg) = ty.path.segments.last() {
if seg.ident == "PhantomData" {
return false;
}
}
}
match derive {
Derive::Serialize => !field.attrs.skip_serializing(),
Derive::Deserialize => !field.attrs.skip_deserializing() && field.attrs.default().is_none(),
}
}
fn check_from_and_try_from(cx: &Ctxt, cont: &mut Container) {
if cont.attrs.type_from().is_some() && cont.attrs.type_try_from().is_some() {
cx.error_spanned_by(
cont.original,
"#[serde(from = \"...\")] and #[serde(try_from = \"...\")] conflict with each other",
);
}
}

62
zeroidc/vendor/serde_derive/src/internals/ctxt.rs vendored Normal file
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use quote::ToTokens;
use std::cell::RefCell;
use std::fmt::Display;
use std::thread;
use syn;
/// A type to collect errors together and format them.
///
/// Dropping this object will cause a panic. It must be consumed using `check`.
///
/// References can be shared since this type uses run-time exclusive mut checking.
#[derive(Default)]
pub struct Ctxt {
// The contents will be set to `None` during checking. This is so that checking can be
// enforced.
errors: RefCell<Option<Vec<syn::Error>>>,
}
impl Ctxt {
/// Create a new context object.
///
/// This object contains no errors, but will still trigger a panic if it is not `check`ed.
pub fn new() -> Self {
Ctxt {
errors: RefCell::new(Some(Vec::new())),
}
}
/// Add an error to the context object with a tokenenizable object.
///
/// The object is used for spanning in error messages.
pub fn error_spanned_by<A: ToTokens, T: Display>(&self, obj: A, msg: T) {
self.errors
.borrow_mut()
.as_mut()
.unwrap()
// Curb monomorphization from generating too many identical methods.
.push(syn::Error::new_spanned(obj.into_token_stream(), msg));
}
/// Add one of Syn's parse errors.
pub fn syn_error(&self, err: syn::Error) {
self.errors.borrow_mut().as_mut().unwrap().push(err);
}
/// Consume this object, producing a formatted error string if there are errors.
pub fn check(self) -> Result<(), Vec<syn::Error>> {
let errors = self.errors.borrow_mut().take().unwrap();
match errors.len() {
0 => Ok(()),
_ => Err(errors),
}
}
}
impl Drop for Ctxt {
fn drop(&mut self) {
if !thread::panicking() && self.errors.borrow().is_some() {
panic!("forgot to check for errors");
}
}
}

28
zeroidc/vendor/serde_derive/src/internals/mod.rs vendored Normal file
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@@ -0,0 +1,28 @@
pub mod ast;
pub mod attr;
mod ctxt;
pub use self::ctxt::Ctxt;
mod receiver;
pub use self::receiver::replace_receiver;
mod case;
mod check;
mod respan;
mod symbol;
use syn::Type;
#[derive(Copy, Clone)]
pub enum Derive {
Serialize,
Deserialize,
}
pub fn ungroup(mut ty: &Type) -> &Type {
while let Type::Group(group) = ty {
ty = &group.elem;
}
ty
}

285
zeroidc/vendor/serde_derive/src/internals/receiver.rs vendored Normal file
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use internals::respan::respan;
use proc_macro2::Span;
use quote::ToTokens;
use std::mem;
use syn::punctuated::Punctuated;
use syn::{
parse_quote, Data, DeriveInput, Expr, ExprPath, GenericArgument, GenericParam, Generics, Macro,
Path, PathArguments, QSelf, ReturnType, Type, TypeParamBound, TypePath, WherePredicate,
};
pub fn replace_receiver(input: &mut DeriveInput) {
let self_ty = {
let ident = &input.ident;
let ty_generics = input.generics.split_for_impl().1;
parse_quote!(#ident #ty_generics)
};
let mut visitor = ReplaceReceiver(&self_ty);
visitor.visit_generics_mut(&mut input.generics);
visitor.visit_data_mut(&mut input.data);
}
struct ReplaceReceiver<'a>(&'a TypePath);
impl ReplaceReceiver<'_> {
fn self_ty(&self, span: Span) -> TypePath {
let tokens = self.0.to_token_stream();
let respanned = respan(tokens, span);
syn::parse2(respanned).unwrap()
}
fn self_to_qself(&self, qself: &mut Option<QSelf>, path: &mut Path) {
if path.leading_colon.is_some() || path.segments[0].ident != "Self" {
return;
}
if path.segments.len() == 1 {
self.self_to_expr_path(path);
return;
}
let span = path.segments[0].ident.span();
*qself = Some(QSelf {
lt_token: Token![<](span),
ty: Box::new(Type::Path(self.self_ty(span))),
position: 0,
as_token: None,
gt_token: Token![>](span),
});
path.leading_colon = Some(**path.segments.pairs().next().unwrap().punct().unwrap());
let segments = mem::replace(&mut path.segments, Punctuated::new());
path.segments = segments.into_pairs().skip(1).collect();
}
fn self_to_expr_path(&self, path: &mut Path) {
let self_ty = self.self_ty(path.segments[0].ident.span());
let variant = mem::replace(path, self_ty.path);
for segment in &mut path.segments {
if let PathArguments::AngleBracketed(bracketed) = &mut segment.arguments {
if bracketed.colon2_token.is_none() && !bracketed.args.is_empty() {
bracketed.colon2_token = Some(<Token![::]>::default());
}
}
}
if variant.segments.len() > 1 {
path.segments.push_punct(<Token![::]>::default());
path.segments.extend(variant.segments.into_pairs().skip(1));
}
}
}
impl ReplaceReceiver<'_> {
// `Self` -> `Receiver`
fn visit_type_mut(&mut self, ty: &mut Type) {
let span = if let Type::Path(node) = ty {
if node.qself.is_none() && node.path.is_ident("Self") {
node.path.segments[0].ident.span()
} else {
self.visit_type_path_mut(node);
return;
}
} else {
self.visit_type_mut_impl(ty);
return;
};
*ty = self.self_ty(span).into();
}
// `Self::Assoc` -> `<Receiver>::Assoc`
fn visit_type_path_mut(&mut self, ty: &mut TypePath) {
if ty.qself.is_none() {
self.self_to_qself(&mut ty.qself, &mut ty.path);
}
self.visit_type_path_mut_impl(ty);
}
// `Self::method` -> `<Receiver>::method`
fn visit_expr_path_mut(&mut self, expr: &mut ExprPath) {
if expr.qself.is_none() {
self.self_to_qself(&mut expr.qself, &mut expr.path);
}
self.visit_expr_path_mut_impl(expr);
}
// Everything below is simply traversing the syntax tree.
fn visit_type_mut_impl(&mut self, ty: &mut Type) {
match ty {
Type::Array(ty) => {
self.visit_type_mut(&mut ty.elem);
self.visit_expr_mut(&mut ty.len);
}
Type::BareFn(ty) => {
for arg in &mut ty.inputs {
self.visit_type_mut(&mut arg.ty);
}
self.visit_return_type_mut(&mut ty.output);
}
Type::Group(ty) => self.visit_type_mut(&mut ty.elem),
Type::ImplTrait(ty) => {
for bound in &mut ty.bounds {
self.visit_type_param_bound_mut(bound);
}
}
Type::Macro(ty) => self.visit_macro_mut(&mut ty.mac),
Type::Paren(ty) => self.visit_type_mut(&mut ty.elem),
Type::Path(ty) => {
if let Some(qself) = &mut ty.qself {
self.visit_type_mut(&mut qself.ty);
}
self.visit_path_mut(&mut ty.path);
}
Type::Ptr(ty) => self.visit_type_mut(&mut ty.elem),
Type::Reference(ty) => self.visit_type_mut(&mut ty.elem),
Type::Slice(ty) => self.visit_type_mut(&mut ty.elem),
Type::TraitObject(ty) => {
for bound in &mut ty.bounds {
self.visit_type_param_bound_mut(bound);
}
}
Type::Tuple(ty) => {
for elem in &mut ty.elems {
self.visit_type_mut(elem);
}
}
Type::Infer(_) | Type::Never(_) | Type::Verbatim(_) => {}
#[cfg_attr(all(test, exhaustive), deny(non_exhaustive_omitted_patterns))]
_ => {}
}
}
fn visit_type_path_mut_impl(&mut self, ty: &mut TypePath) {
if let Some(qself) = &mut ty.qself {
self.visit_type_mut(&mut qself.ty);
}
self.visit_path_mut(&mut ty.path);
}
fn visit_expr_path_mut_impl(&mut self, expr: &mut ExprPath) {
if let Some(qself) = &mut expr.qself {
self.visit_type_mut(&mut qself.ty);
}
self.visit_path_mut(&mut expr.path);
}
fn visit_path_mut(&mut self, path: &mut Path) {
for segment in &mut path.segments {
self.visit_path_arguments_mut(&mut segment.arguments);
}
}
fn visit_path_arguments_mut(&mut self, arguments: &mut PathArguments) {
match arguments {
PathArguments::None => {}
PathArguments::AngleBracketed(arguments) => {
for arg in &mut arguments.args {
match arg {
GenericArgument::Type(arg) => self.visit_type_mut(arg),
GenericArgument::Binding(arg) => self.visit_type_mut(&mut arg.ty),
GenericArgument::Lifetime(_)
| GenericArgument::Constraint(_)
| GenericArgument::Const(_) => {}
}
}
}
PathArguments::Parenthesized(arguments) => {
for argument in &mut arguments.inputs {
self.visit_type_mut(argument);
}
self.visit_return_type_mut(&mut arguments.output);
}
}
}
fn visit_return_type_mut(&mut self, return_type: &mut ReturnType) {
match return_type {
ReturnType::Default => {}
ReturnType::Type(_, output) => self.visit_type_mut(output),
}
}
fn visit_type_param_bound_mut(&mut self, bound: &mut TypeParamBound) {
match bound {
TypeParamBound::Trait(bound) => self.visit_path_mut(&mut bound.path),
TypeParamBound::Lifetime(_) => {}
}
}
fn visit_generics_mut(&mut self, generics: &mut Generics) {
for param in &mut generics.params {
match param {
GenericParam::Type(param) => {
for bound in &mut param.bounds {
self.visit_type_param_bound_mut(bound);
}
}
GenericParam::Lifetime(_) | GenericParam::Const(_) => {}
}
}
if let Some(where_clause) = &mut generics.where_clause {
for predicate in &mut where_clause.predicates {
match predicate {
WherePredicate::Type(predicate) => {
self.visit_type_mut(&mut predicate.bounded_ty);
for bound in &mut predicate.bounds {
self.visit_type_param_bound_mut(bound);
}
}
WherePredicate::Lifetime(_) | WherePredicate::Eq(_) => {}
}
}
}
}
fn visit_data_mut(&mut self, data: &mut Data) {
match data {
Data::Struct(data) => {
for field in &mut data.fields {
self.visit_type_mut(&mut field.ty);
}
}
Data::Enum(data) => {
for variant in &mut data.variants {
for field in &mut variant.fields {
self.visit_type_mut(&mut field.ty);
}
}
}
Data::Union(_) => {}
}
}
fn visit_expr_mut(&mut self, expr: &mut Expr) {
match expr {
Expr::Binary(expr) => {
self.visit_expr_mut(&mut expr.left);
self.visit_expr_mut(&mut expr.right);
}
Expr::Call(expr) => {
self.visit_expr_mut(&mut expr.func);
for arg in &mut expr.args {
self.visit_expr_mut(arg);
}
}
Expr::Cast(expr) => {
self.visit_expr_mut(&mut expr.expr);
self.visit_type_mut(&mut expr.ty);
}
Expr::Field(expr) => self.visit_expr_mut(&mut expr.base),
Expr::Index(expr) => {
self.visit_expr_mut(&mut expr.expr);
self.visit_expr_mut(&mut expr.index);
}
Expr::Paren(expr) => self.visit_expr_mut(&mut expr.expr),
Expr::Path(expr) => self.visit_expr_path_mut(expr),
Expr::Unary(expr) => self.visit_expr_mut(&mut expr.expr),
_ => {}
}
}
fn visit_macro_mut(&mut self, _mac: &mut Macro) {}
}

16
zeroidc/vendor/serde_derive/src/internals/respan.rs vendored Normal file
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use proc_macro2::{Group, Span, TokenStream, TokenTree};
pub(crate) fn respan(stream: TokenStream, span: Span) -> TokenStream {
stream
.into_iter()
.map(|token| respan_token(token, span))
.collect()
}
fn respan_token(mut token: TokenTree, span: Span) -> TokenTree {
if let TokenTree::Group(g) = &mut token {
*g = Group::new(g.delimiter(), respan(g.stream(), span));
}
token.set_span(span);
token
}

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zeroidc/vendor/serde_derive/src/internals/symbol.rs vendored Normal file
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use std::fmt::{self, Display};
use syn::{Ident, Path};
#[derive(Copy, Clone)]
pub struct Symbol(&'static str);
pub const ALIAS: Symbol = Symbol("alias");
pub const BORROW: Symbol = Symbol("borrow");
pub const BOUND: Symbol = Symbol("bound");
pub const CONTENT: Symbol = Symbol("content");
pub const CRATE: Symbol = Symbol("crate");
pub const DEFAULT: Symbol = Symbol("default");
pub const DENY_UNKNOWN_FIELDS: Symbol = Symbol("deny_unknown_fields");
pub const DESERIALIZE: Symbol = Symbol("deserialize");
pub const DESERIALIZE_WITH: Symbol = Symbol("deserialize_with");
pub const FIELD_IDENTIFIER: Symbol = Symbol("field_identifier");
pub const FLATTEN: Symbol = Symbol("flatten");
pub const FROM: Symbol = Symbol("from");
pub const GETTER: Symbol = Symbol("getter");
pub const INTO: Symbol = Symbol("into");
pub const OTHER: Symbol = Symbol("other");
pub const REMOTE: Symbol = Symbol("remote");
pub const RENAME: Symbol = Symbol("rename");
pub const RENAME_ALL: Symbol = Symbol("rename_all");
pub const SERDE: Symbol = Symbol("serde");
pub const SERIALIZE: Symbol = Symbol("serialize");
pub const SERIALIZE_WITH: Symbol = Symbol("serialize_with");
pub const SKIP: Symbol = Symbol("skip");
pub const SKIP_DESERIALIZING: Symbol = Symbol("skip_deserializing");
pub const SKIP_SERIALIZING: Symbol = Symbol("skip_serializing");
pub const SKIP_SERIALIZING_IF: Symbol = Symbol("skip_serializing_if");
pub const TAG: Symbol = Symbol("tag");
pub const TRANSPARENT: Symbol = Symbol("transparent");
pub const TRY_FROM: Symbol = Symbol("try_from");
pub const UNTAGGED: Symbol = Symbol("untagged");
pub const VARIANT_IDENTIFIER: Symbol = Symbol("variant_identifier");
pub const WITH: Symbol = Symbol("with");
pub const EXPECTING: Symbol = Symbol("expecting");
impl PartialEq<Symbol> for Ident {
fn eq(&self, word: &Symbol) -> bool {
self == word.0
}
}
impl<'a> PartialEq<Symbol> for &'a Ident {
fn eq(&self, word: &Symbol) -> bool {
*self == word.0
}
}
impl PartialEq<Symbol> for Path {
fn eq(&self, word: &Symbol) -> bool {
self.is_ident(word.0)
}
}
impl<'a> PartialEq<Symbol> for &'a Path {
fn eq(&self, word: &Symbol) -> bool {
self.is_ident(word.0)
}
}
impl Display for Symbol {
fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
formatter.write_str(self.0)
}
}

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//! This crate provides Serde's two derive macros.
//!
//! ```edition2018
//! # use serde_derive::{Serialize, Deserialize};
//! #
//! #[derive(Serialize, Deserialize)]
//! # struct S;
//! #
//! # fn main() {}
//! ```
//!
//! Please refer to [https://serde.rs/derive.html] for how to set this up.
//!
//! [https://serde.rs/derive.html]: https://serde.rs/derive.html
#![doc(html_root_url = "https://docs.rs/serde_derive/1.0.137")]
#![allow(unknown_lints, bare_trait_objects)]
// Ignored clippy lints
#![allow(
// clippy false positive: https://github.com/rust-lang/rust-clippy/issues/7054
clippy::branches_sharing_code,
clippy::cognitive_complexity,
// clippy bug: https://github.com/rust-lang/rust-clippy/issues/7575
clippy::collapsible_match,
clippy::enum_variant_names,
// clippy bug: https://github.com/rust-lang/rust-clippy/issues/6797
clippy::manual_map,
clippy::match_like_matches_macro,
clippy::needless_pass_by_value,
clippy::too_many_arguments,
clippy::trivially_copy_pass_by_ref,
clippy::used_underscore_binding,
clippy::wildcard_in_or_patterns,
// clippy bug: https://github.com/rust-lang/rust-clippy/issues/5704
clippy::unnested_or_patterns,
)]
// Ignored clippy_pedantic lints
#![allow(
clippy::cast_possible_truncation,
clippy::checked_conversions,
clippy::doc_markdown,
clippy::enum_glob_use,
clippy::indexing_slicing,
clippy::items_after_statements,
clippy::let_underscore_drop,
clippy::manual_assert,
clippy::map_err_ignore,
clippy::match_same_arms,
// clippy bug: https://github.com/rust-lang/rust-clippy/issues/6984
clippy::match_wildcard_for_single_variants,
clippy::module_name_repetitions,
clippy::must_use_candidate,
clippy::option_if_let_else,
clippy::similar_names,
clippy::single_match_else,
clippy::struct_excessive_bools,
clippy::too_many_lines,
clippy::unseparated_literal_suffix,
clippy::unused_self,
clippy::use_self,
clippy::wildcard_imports
)]
#![cfg_attr(all(test, exhaustive), feature(non_exhaustive_omitted_patterns_lint))]
#[macro_use]
extern crate quote;
#[macro_use]
extern crate syn;
extern crate proc_macro;
extern crate proc_macro2;
mod internals;
use proc_macro::TokenStream;
use syn::DeriveInput;
#[macro_use]
mod bound;
#[macro_use]
mod fragment;
mod de;
mod dummy;
mod pretend;
mod ser;
mod try;
#[proc_macro_derive(Serialize, attributes(serde))]
pub fn derive_serialize(input: TokenStream) -> TokenStream {
let mut input = parse_macro_input!(input as DeriveInput);
ser::expand_derive_serialize(&mut input)
.unwrap_or_else(to_compile_errors)
.into()
}
#[proc_macro_derive(Deserialize, attributes(serde))]
pub fn derive_deserialize(input: TokenStream) -> TokenStream {
let mut input = parse_macro_input!(input as DeriveInput);
de::expand_derive_deserialize(&mut input)
.unwrap_or_else(to_compile_errors)
.into()
}
fn to_compile_errors(errors: Vec<syn::Error>) -> proc_macro2::TokenStream {
let compile_errors = errors.iter().map(syn::Error::to_compile_error);
quote!(#(#compile_errors)*)
}

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zeroidc/vendor/serde_derive/src/pretend.rs vendored Normal file
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use proc_macro2::TokenStream;
use quote::format_ident;
use internals::ast::{Container, Data, Field, Style, Variant};
// Suppress dead_code warnings that would otherwise appear when using a remote
// derive. Other than this pretend code, a struct annotated with remote derive
// never has its fields referenced and an enum annotated with remote derive
// never has its variants constructed.
//
// warning: field is never used: `i`
// --> src/main.rs:4:20
// |
// 4 | struct StructDef { i: i32 }
// | ^^^^^^
//
// warning: variant is never constructed: `V`
// --> src/main.rs:8:16
// |
// 8 | enum EnumDef { V }
// | ^
//
pub fn pretend_used(cont: &Container, is_packed: bool) -> TokenStream {
let pretend_fields = pretend_fields_used(cont, is_packed);
let pretend_variants = pretend_variants_used(cont);
quote! {
#pretend_fields
#pretend_variants
}
}
// For structs with named fields, expands to:
//
// match None::<&T> {
// Some(T { a: __v0, b: __v1 }) => {}
// _ => {}
// }
//
// For packed structs on sufficiently new rustc, expands to:
//
// match None::<&T> {
// Some(__v @ T { a: _, b: _ }) => {
// let _ = addr_of!(__v.a);
// let _ = addr_of!(__v.b);
// }
// _ => {}
// }
//
// For packed structs on older rustc, we assume Sized and !Drop, and expand to:
//
// match None::<T> {
// Some(T { a: __v0, b: __v1 }) => {}
// _ => {}
// }
//
// For enums, expands to the following but only including struct variants:
//
// match None::<&T> {
// Some(T::A { a: __v0 }) => {}
// Some(T::B { b: __v0 }) => {}
// _ => {}
// }
//
fn pretend_fields_used(cont: &Container, is_packed: bool) -> TokenStream {
match &cont.data {
Data::Enum(variants) => pretend_fields_used_enum(cont, variants),
Data::Struct(Style::Struct, fields) => {
if is_packed {
pretend_fields_used_struct_packed(cont, fields)
} else {
pretend_fields_used_struct(cont, fields)
}
}
Data::Struct(_, _) => quote!(),
}
}
fn pretend_fields_used_struct(cont: &Container, fields: &[Field]) -> TokenStream {
let type_ident = &cont.ident;
let (_, ty_generics, _) = cont.generics.split_for_impl();
let members = fields.iter().map(|field| &field.member);
let placeholders = (0usize..).map(|i| format_ident!("__v{}", i));
quote! {
match _serde::__private::None::<&#type_ident #ty_generics> {
_serde::__private::Some(#type_ident { #(#members: #placeholders),* }) => {}
_ => {}
}
}
}
fn pretend_fields_used_struct_packed(cont: &Container, fields: &[Field]) -> TokenStream {
let type_ident = &cont.ident;
let (_, ty_generics, _) = cont.generics.split_for_impl();
let members = fields.iter().map(|field| &field.member).collect::<Vec<_>>();
#[cfg(ptr_addr_of)]
{
quote! {
match _serde::__private::None::<&#type_ident #ty_generics> {
_serde::__private::Some(__v @ #type_ident { #(#members: _),* }) => {
#(
let _ = _serde::__private::ptr::addr_of!(__v.#members);
)*
}
_ => {}
}
}
}
#[cfg(not(ptr_addr_of))]
{
let placeholders = (0usize..).map(|i| format_ident!("__v{}", i));
quote! {
match _serde::__private::None::<#type_ident #ty_generics> {
_serde::__private::Some(#type_ident { #(#members: #placeholders),* }) => {}
_ => {}
}
}
}
}
fn pretend_fields_used_enum(cont: &Container, variants: &[Variant]) -> TokenStream {
let type_ident = &cont.ident;
let (_, ty_generics, _) = cont.generics.split_for_impl();
let patterns = variants
.iter()
.filter_map(|variant| match variant.style {
Style::Struct => {
let variant_ident = &variant.ident;
let members = variant.fields.iter().map(|field| &field.member);
let placeholders = (0usize..).map(|i| format_ident!("__v{}", i));
Some(quote!(#type_ident::#variant_ident { #(#members: #placeholders),* }))
}
_ => None,
})
.collect::<Vec<_>>();
quote! {
match _serde::__private::None::<&#type_ident #ty_generics> {
#(
_serde::__private::Some(#patterns) => {}
)*
_ => {}
}
}
}
// Expands to one of these per enum variant:
//
// match None {
// Some((__v0, __v1,)) => {
// let _ = E::V { a: __v0, b: __v1 };
// }
// _ => {}
// }
//
fn pretend_variants_used(cont: &Container) -> TokenStream {
let variants = match &cont.data {
Data::Enum(variants) => variants,
Data::Struct(_, _) => {
return quote!();
}
};
let type_ident = &cont.ident;
let (_, ty_generics, _) = cont.generics.split_for_impl();
let turbofish = ty_generics.as_turbofish();
let cases = variants.iter().map(|variant| {
let variant_ident = &variant.ident;
let placeholders = &(0..variant.fields.len())
.map(|i| format_ident!("__v{}", i))
.collect::<Vec<_>>();
let pat = match variant.style {
Style::Struct => {
let members = variant.fields.iter().map(|field| &field.member);
quote!({ #(#members: #placeholders),* })
}
Style::Tuple | Style::Newtype => quote!(( #(#placeholders),* )),
Style::Unit => quote!(),
};
quote! {
match _serde::__private::None {
_serde::__private::Some((#(#placeholders,)*)) => {
let _ = #type_ident::#variant_ident #turbofish #pat;
}
_ => {}
}
}
});
quote!(#(#cases)*)
}

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24
zeroidc/vendor/serde_derive/src/try.rs vendored Normal file
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use proc_macro2::{Punct, Spacing, TokenStream};
// None of our generated code requires the `From::from` error conversion
// performed by the standard library's `try!` macro. With this simplified macro
// we see a significant improvement in type checking and borrow checking time of
// the generated code and a slight improvement in binary size.
pub fn replacement() -> TokenStream {
// Cannot pass `$expr` to `quote!` prior to Rust 1.17.0 so interpolate it.
let dollar = Punct::new('$', Spacing::Alone);
quote! {
#[allow(unused_macros)]
macro_rules! try {
(#dollar __expr:expr) => {
match #dollar __expr {
_serde::__private::Ok(__val) => __val,
_serde::__private::Err(__err) => {
return _serde::__private::Err(__err);
}
}
}
}
}
}