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Convert split_with_de_lifetime to method of Parameters

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Mingun 2025-06-14 19:59:09 +05:00
parent 4855fb467f
commit ddb7c4b30f
1 changed files with 28 additions and 34 deletions
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62
serde_derive/src/de.rs
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@ -25,7 +25,7 @@ pub fn expand_derive_deserialize(input: &mut syn::DeriveInput) -> syn::Result<To
let ident = &cont.ident;
let params = Parameters::new(&cont);
let (de_impl_generics, _, ty_generics, where_clause) = split_with_de_lifetime(&params);
let (de_impl_generics, _, ty_generics, where_clause) = params.generics();
let body = Stmts(deserialize_body(&cont, &params));
let delife = params.borrowed.de_lifetime();
let allow_deprecated = allow_deprecated(input);
@ -157,6 +157,23 @@ impl Parameters {
fn type_name(&self) -> String {
self.this_type.segments.last().unwrap().ident.to_string()
}
/// Split a deserialized type's generics into the pieces required for impl'ing
/// a `Deserialize` trait for that type. Additionally appends the `'de` lifetime
/// to list of impl generics.
fn generics(
&self,
) -> (
DeImplGenerics,
DeTypeGenerics,
syn::TypeGenerics,
Option<&syn::WhereClause>,
) {
let de_impl_generics = DeImplGenerics(self);
let de_ty_generics = DeTypeGenerics(self);
let (_, ty_generics, where_clause) = self.generics.split_for_impl();
(de_impl_generics, de_ty_generics, ty_generics, where_clause)
}
}
// All the generics in the input, plus a bound `T: Deserialize` for each generic
@ -418,8 +435,7 @@ fn deserialize_unit_struct(params: &Parameters, cattrs: &attr::Container) -> Fra
let this_type = &params.this_type;
let this_value = &params.this_value;
let type_name = cattrs.name().deserialize_name();
let (de_impl_generics, de_ty_generics, ty_generics, where_clause) =
split_with_de_lifetime(params);
let (de_impl_generics, de_ty_generics, ty_generics, where_clause) = params.generics();
let delife = params.borrowed.de_lifetime();
let expecting = format!("unit struct {}", params.type_name());
@ -488,8 +504,7 @@ fn deserialize_tuple(
let this_type = &params.this_type;
let this_value = &params.this_value;
let (de_impl_generics, de_ty_generics, ty_generics, where_clause) =
split_with_de_lifetime(params);
let (de_impl_generics, de_ty_generics, ty_generics, where_clause) = params.generics();
let delife = params.borrowed.de_lifetime();
// If there are getters (implying private fields), construct the local type
@ -610,8 +625,7 @@ fn deserialize_tuple_in_place(
.count();
let this_type = &params.this_type;
let (de_impl_generics, de_ty_generics, ty_generics, where_clause) =
split_with_de_lifetime(params);
let (de_impl_generics, de_ty_generics, ty_generics, where_clause) = params.generics();
let delife = params.borrowed.de_lifetime();
let expecting = format!("tuple struct {}", params.type_name());
@ -952,8 +966,7 @@ fn deserialize_struct(
) -> Fragment {
let this_type = &params.this_type;
let this_value = &params.this_value;
let (de_impl_generics, de_ty_generics, ty_generics, where_clause) =
split_with_de_lifetime(params);
let (de_impl_generics, de_ty_generics, ty_generics, where_clause) = params.generics();
let delife = params.borrowed.de_lifetime();
// If there are getters (implying private fields), construct the local type
@ -1140,8 +1153,7 @@ fn deserialize_struct_in_place(
}
let this_type = &params.this_type;
let (de_impl_generics, de_ty_generics, ty_generics, where_clause) =
split_with_de_lifetime(params);
let (de_impl_generics, de_ty_generics, ty_generics, where_clause) = params.generics();
let delife = params.borrowed.de_lifetime();
let expecting = format!("struct {}", params.type_name());
@ -1308,8 +1320,7 @@ fn deserialize_externally_tagged_enum(
cattrs: &attr::Container,
) -> Fragment {
let this_type = &params.this_type;
let (de_impl_generics, de_ty_generics, ty_generics, where_clause) =
split_with_de_lifetime(params);
let (de_impl_generics, de_ty_generics, ty_generics, where_clause) = params.generics();
let delife = params.borrowed.de_lifetime();
let type_name = cattrs.name().deserialize_name();
@ -1454,8 +1465,7 @@ fn deserialize_adjacently_tagged_enum(
) -> Fragment {
let this_type = &params.this_type;
let this_value = &params.this_value;
let (de_impl_generics, de_ty_generics, ty_generics, where_clause) =
split_with_de_lifetime(params);
let (de_impl_generics, de_ty_generics, ty_generics, where_clause) = params.generics();
let delife = params.borrowed.de_lifetime();
let (variants_stmt, variant_visitor) = prepare_enum_variant_enum(variants);
@ -2182,8 +2192,7 @@ fn deserialize_custom_identifier(
Some(fields)
};
let (de_impl_generics, de_ty_generics, ty_generics, where_clause) =
split_with_de_lifetime(params);
let (de_impl_generics, de_ty_generics, ty_generics, where_clause) = params.generics();
let delife = params.borrowed.de_lifetime();
let visitor_impl = Stmts(deserialize_identifier(
&this_value,
@ -2861,7 +2870,7 @@ fn deserialize_map_in_place(
});
let this_type = &params.this_type;
let (_, _, ty_generics, _) = split_with_de_lifetime(params);
let (_, _, ty_generics, _) = params.generics();
let let_default = match cattrs.default() {
attr::Default::Default => Some(quote!(
@ -2906,8 +2915,7 @@ fn wrap_deserialize_with(
deserialize_with: &syn::ExprPath,
) -> (TokenStream, TokenStream) {
let this_type = &params.this_type;
let (de_impl_generics, de_ty_generics, ty_generics, where_clause) =
split_with_de_lifetime(params);
let (de_impl_generics, de_ty_generics, ty_generics, where_clause) = params.generics();
let delife = params.borrowed.de_lifetime();
let deserializer_var = quote!(__deserializer);
@ -3227,17 +3235,3 @@ fn place_lifetime() -> syn::LifetimeParam {
bounds: Punctuated::new(),
}
}
fn split_with_de_lifetime(
params: &Parameters,
) -> (
DeImplGenerics,
DeTypeGenerics,
syn::TypeGenerics,
Option<&syn::WhereClause>,
) {
let de_impl_generics = DeImplGenerics(params);
let de_ty_generics = DeTypeGenerics(params);
let (_, ty_generics, where_clause) = params.generics.split_for_impl();
(de_impl_generics, de_ty_generics, ty_generics, where_clause)
}