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authorValentin Popov <valentin@popov.link>2024-07-19 15:37:58 +0300
committerValentin Popov <valentin@popov.link>2024-07-19 15:37:58 +0300
commita990de90fe41456a23e58bd087d2f107d321f3a1 (patch)
tree15afc392522a9e85dc3332235e311b7d39352ea9 /vendor/serde_derive/src/bound.rs
parent3d48cd3f81164bbfc1a755dc1d4a9a02f98c8ddd (diff)
downloadfparkan-a990de90fe41456a23e58bd087d2f107d321f3a1.tar.xz
fparkan-a990de90fe41456a23e58bd087d2f107d321f3a1.zip
Deleted vendor folder
Diffstat (limited to 'vendor/serde_derive/src/bound.rs')
-rw-r--r--vendor/serde_derive/src/bound.rs408
1 files changed, 0 insertions, 408 deletions
diff --git a/vendor/serde_derive/src/bound.rs b/vendor/serde_derive/src/bound.rs
deleted file mode 100644
index fe8ccff..0000000
--- a/vendor/serde_derive/src/bound.rs
+++ /dev/null
@@ -1,408 +0,0 @@
-use crate::internals::ast::{Container, Data};
-use crate::internals::{attr, ungroup};
-use proc_macro2::Span;
-use std::collections::HashSet;
-use syn::punctuated::{Pair, Punctuated};
-use syn::Token;
-
-// 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 {
- #![cfg_attr(all(test, exhaustive), deny(non_exhaustive_omitted_patterns))]
- 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(_) => {}
-
- _ => {}
- }
- }
-
- 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 {
- #![cfg_attr(all(test, exhaustive), deny(non_exhaustive_omitted_patterns))]
- syn::GenericArgument::Type(arg) => self.visit_type(arg),
- syn::GenericArgument::AssocType(arg) => self.visit_type(&arg.ty),
- syn::GenericArgument::Lifetime(_)
- | syn::GenericArgument::Const(_)
- | syn::GenericArgument::AssocConst(_)
- | syn::GenericArgument::Constraint(_) => {}
- _ => {}
- }
- }
- }
- 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 {
- #![cfg_attr(all(test, exhaustive), deny(non_exhaustive_omitted_patterns))]
- syn::TypeParamBound::Trait(bound) => self.visit_path(&bound.path),
- syn::TypeParamBound::Lifetime(_) | syn::TypeParamBound::Verbatim(_) => {}
- _ => {}
- }
- }
-
- // 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 {
- 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::LifetimeParam {
- 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(),
- },
- })
-}