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Group some functions that used together

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Mingun 2025-09-19 21:39:47 +05:00
parent 88b6a9abf4
commit 8c3445efe4
4 changed files with 241 additions and 241 deletions
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28
serde_derive/src/de/enum_externally.rs
View File

@ -158,6 +158,20 @@ fn deserialize_externally_tagged_variant(
}
}
fn wrap_deserialize_variant_with(
params: &Parameters,
variant: &Variant,
deserialize_with: &syn::ExprPath,
) -> (TokenStream, TokenStream, TokenStream) {
let field_tys = variant.fields.iter().map(|field| field.ty);
let (wrapper, wrapper_ty) =
wrap_deserialize_with(params, &quote!((#(#field_tys),*)), deserialize_with);
let unwrap_fn = unwrap_to_variant_closure(params, variant, true);
(wrapper, wrapper_ty, unwrap_fn)
}
fn deserialize_externally_tagged_newtype_variant(
variant_ident: &syn::Ident,
params: &Parameters,
@ -195,17 +209,3 @@ fn deserialize_externally_tagged_newtype_variant(
}
}
}
fn wrap_deserialize_variant_with(
params: &Parameters,
variant: &Variant,
deserialize_with: &syn::ExprPath,
) -> (TokenStream, TokenStream, TokenStream) {
let field_tys = variant.fields.iter().map(|field| field.ty);
let (wrapper, wrapper_ty) =
wrap_deserialize_with(params, &quote!((#(#field_tys),*)), deserialize_with);
let unwrap_fn = unwrap_to_variant_closure(params, variant, true);
(wrapper, wrapper_ty, unwrap_fn)
}

120
serde_derive/src/de/identifier.rs
View File

@ -8,66 +8,6 @@ use crate::private;
use proc_macro2::{Literal, TokenStream};
use quote::{quote, ToTokens};
pub fn generate_identifier(
deserialized_fields: &[FieldWithAliases],
has_flatten: bool,
is_variant: bool,
ignore_variant: Option<TokenStream>,
fallthrough: Option<TokenStream>,
) -> Fragment {
let this_value = quote!(__Field);
let field_idents: &Vec<_> = &deserialized_fields
.iter()
.map(|field| &field.ident)
.collect();
let visitor_impl = Stmts(deserialize_identifier(
&this_value,
deserialized_fields,
is_variant,
fallthrough,
None,
!is_variant && has_flatten,
None,
));
let lifetime = if !is_variant && has_flatten {
Some(quote!(<'de>))
} else {
None
};
quote_block! {
#[allow(non_camel_case_types)]
#[doc(hidden)]
enum __Field #lifetime {
#(#field_idents,)*
#ignore_variant
}
#[doc(hidden)]
struct __FieldVisitor;
#[automatically_derived]
impl<'de> _serde::de::Visitor<'de> for __FieldVisitor {
type Value = __Field #lifetime;
#visitor_impl
}
#[automatically_derived]
impl<'de> _serde::Deserialize<'de> for __Field #lifetime {
#[inline]
fn deserialize<__D>(__deserializer: __D) -> _serde::#private::Result<Self, __D::Error>
where
__D: _serde::Deserializer<'de>,
{
_serde::Deserializer::deserialize_identifier(__deserializer, __FieldVisitor)
}
}
}
}
// Generates `Deserialize::deserialize` body for an enum with
// `serde(field_identifier)` or `serde(variant_identifier)` attribute.
pub fn generate_body(
@ -180,6 +120,66 @@ pub fn generate_body(
}
}
pub fn generate_identifier(
deserialized_fields: &[FieldWithAliases],
has_flatten: bool,
is_variant: bool,
ignore_variant: Option<TokenStream>,
fallthrough: Option<TokenStream>,
) -> Fragment {
let this_value = quote!(__Field);
let field_idents: &Vec<_> = &deserialized_fields
.iter()
.map(|field| &field.ident)
.collect();
let visitor_impl = Stmts(deserialize_identifier(
&this_value,
deserialized_fields,
is_variant,
fallthrough,
None,
!is_variant && has_flatten,
None,
));
let lifetime = if !is_variant && has_flatten {
Some(quote!(<'de>))
} else {
None
};
quote_block! {
#[allow(non_camel_case_types)]
#[doc(hidden)]
enum __Field #lifetime {
#(#field_idents,)*
#ignore_variant
}
#[doc(hidden)]
struct __FieldVisitor;
#[automatically_derived]
impl<'de> _serde::de::Visitor<'de> for __FieldVisitor {
type Value = __Field #lifetime;
#visitor_impl
}
#[automatically_derived]
impl<'de> _serde::Deserialize<'de> for __Field #lifetime {
#[inline]
fn deserialize<__D>(__deserializer: __D) -> _serde::#private::Result<Self, __D::Error>
where
__D: _serde::Deserializer<'de>,
{
_serde::Deserializer::deserialize_identifier(__deserializer, __FieldVisitor)
}
}
}
}
fn deserialize_identifier(
this_value: &TokenStream,
deserialized_fields: &[FieldWithAliases],

236
serde_derive/src/de/struct_.rs
View File

@ -195,124 +195,6 @@ pub fn generate_body(
}
}
/// Generates `Deserialize::deserialize_in_place` body for a `struct Struct {...}`
#[cfg(feature = "deserialize_in_place")]
pub fn generate_body_in_place(
params: &Parameters,
fields: &[Field],
cattrs: &attr::Container,
) -> Option<Fragment> {
// for now we do not support in_place deserialization for structs that
// are represented as map.
if has_flatten(fields) {
return None;
}
let this_type = &params.this_type;
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());
let expecting = cattrs.expecting().unwrap_or(&expecting);
let deserialized_fields: Vec<_> = fields
.iter()
.enumerate()
.filter(|&(_, field)| !field.attrs.skip_deserializing())
.map(|(i, field)| FieldWithAliases {
ident: field_i(i),
aliases: field.attrs.aliases(),
})
.collect();
let field_visitor = deserialize_field_identifier(&deserialized_fields, cattrs, false);
let mut_seq = if deserialized_fields.is_empty() {
quote!(_)
} else {
quote!(mut __seq)
};
let visit_seq = Stmts(deserialize_seq_in_place(params, fields, cattrs, expecting));
let visit_map = Stmts(deserialize_map_in_place(params, fields, cattrs));
let field_names = deserialized_fields.iter().flat_map(|field| field.aliases);
let type_name = cattrs.name().deserialize_name();
let in_place_impl_generics = de_impl_generics.in_place();
let in_place_ty_generics = de_ty_generics.in_place();
let place_life = place_lifetime();
Some(quote_block! {
#field_visitor
#[doc(hidden)]
struct __Visitor #in_place_impl_generics #where_clause {
place: &#place_life mut #this_type #ty_generics,
lifetime: _serde::#private::PhantomData<&#delife ()>,
}
#[automatically_derived]
impl #in_place_impl_generics _serde::de::Visitor<#delife> for __Visitor #in_place_ty_generics #where_clause {
type Value = ();
fn expecting(&self, __formatter: &mut _serde::#private::Formatter) -> _serde::#private::fmt::Result {
_serde::#private::Formatter::write_str(__formatter, #expecting)
}
#[inline]
fn visit_seq<__A>(self, #mut_seq: __A) -> _serde::#private::Result<Self::Value, __A::Error>
where
__A: _serde::de::SeqAccess<#delife>,
{
#visit_seq
}
#[inline]
fn visit_map<__A>(self, mut __map: __A) -> _serde::#private::Result<Self::Value, __A::Error>
where
__A: _serde::de::MapAccess<#delife>,
{
#visit_map
}
}
#[doc(hidden)]
const FIELDS: &'static [&'static str] = &[ #(#field_names),* ];
_serde::Deserializer::deserialize_struct(__deserializer, #type_name, FIELDS, __Visitor {
place: __place,
lifetime: _serde::#private::PhantomData,
})
})
}
/// Generates enum and its `Deserialize` implementation that represents each
/// non-skipped field of the struct
fn deserialize_field_identifier(
deserialized_fields: &[FieldWithAliases],
cattrs: &attr::Container,
has_flatten: bool,
) -> Stmts {
let (ignore_variant, fallthrough) = if has_flatten {
let ignore_variant = quote!(__other(_serde::#private::de::Content<'de>),);
let fallthrough = quote!(_serde::#private::Ok(__Field::__other(__value)));
(Some(ignore_variant), Some(fallthrough))
} else if cattrs.deny_unknown_fields() {
(None, None)
} else {
let ignore_variant = quote!(__ignore,);
let fallthrough = quote!(_serde::#private::Ok(__Field::__ignore));
(Some(ignore_variant), Some(fallthrough))
};
Stmts(identifier::generate_identifier(
deserialized_fields,
has_flatten,
false,
ignore_variant,
fallthrough,
))
}
fn deserialize_map(
struct_path: &TokenStream,
params: &Parameters,
@ -535,6 +417,96 @@ fn deserialize_map(
}
}
/// Generates `Deserialize::deserialize_in_place` body for a `struct Struct {...}`
#[cfg(feature = "deserialize_in_place")]
pub fn generate_body_in_place(
params: &Parameters,
fields: &[Field],
cattrs: &attr::Container,
) -> Option<Fragment> {
// for now we do not support in_place deserialization for structs that
// are represented as map.
if has_flatten(fields) {
return None;
}
let this_type = &params.this_type;
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());
let expecting = cattrs.expecting().unwrap_or(&expecting);
let deserialized_fields: Vec<_> = fields
.iter()
.enumerate()
.filter(|&(_, field)| !field.attrs.skip_deserializing())
.map(|(i, field)| FieldWithAliases {
ident: field_i(i),
aliases: field.attrs.aliases(),
})
.collect();
let field_visitor = deserialize_field_identifier(&deserialized_fields, cattrs, false);
let mut_seq = if deserialized_fields.is_empty() {
quote!(_)
} else {
quote!(mut __seq)
};
let visit_seq = Stmts(deserialize_seq_in_place(params, fields, cattrs, expecting));
let visit_map = Stmts(deserialize_map_in_place(params, fields, cattrs));
let field_names = deserialized_fields.iter().flat_map(|field| field.aliases);
let type_name = cattrs.name().deserialize_name();
let in_place_impl_generics = de_impl_generics.in_place();
let in_place_ty_generics = de_ty_generics.in_place();
let place_life = place_lifetime();
Some(quote_block! {
#field_visitor
#[doc(hidden)]
struct __Visitor #in_place_impl_generics #where_clause {
place: &#place_life mut #this_type #ty_generics,
lifetime: _serde::#private::PhantomData<&#delife ()>,
}
#[automatically_derived]
impl #in_place_impl_generics _serde::de::Visitor<#delife> for __Visitor #in_place_ty_generics #where_clause {
type Value = ();
fn expecting(&self, __formatter: &mut _serde::#private::Formatter) -> _serde::#private::fmt::Result {
_serde::#private::Formatter::write_str(__formatter, #expecting)
}
#[inline]
fn visit_seq<__A>(self, #mut_seq: __A) -> _serde::#private::Result<Self::Value, __A::Error>
where
__A: _serde::de::SeqAccess<#delife>,
{
#visit_seq
}
#[inline]
fn visit_map<__A>(self, mut __map: __A) -> _serde::#private::Result<Self::Value, __A::Error>
where
__A: _serde::de::MapAccess<#delife>,
{
#visit_map
}
}
#[doc(hidden)]
const FIELDS: &'static [&'static str] = &[ #(#field_names),* ];
_serde::Deserializer::deserialize_struct(__deserializer, #type_name, FIELDS, __Visitor {
place: __place,
lifetime: _serde::#private::PhantomData,
})
})
}
#[cfg(feature = "deserialize_in_place")]
fn deserialize_map_in_place(
params: &Parameters,
@ -693,3 +665,31 @@ fn deserialize_map_in_place(
_serde::#private::Ok(())
}
}
/// Generates enum and its `Deserialize` implementation that represents each
/// non-skipped field of the struct
fn deserialize_field_identifier(
deserialized_fields: &[FieldWithAliases],
cattrs: &attr::Container,
has_flatten: bool,
) -> Stmts {
let (ignore_variant, fallthrough) = if has_flatten {
let ignore_variant = quote!(__other(_serde::#private::de::Content<'de>),);
let fallthrough = quote!(_serde::#private::Ok(__Field::__other(__value)));
(Some(ignore_variant), Some(fallthrough))
} else if cattrs.deny_unknown_fields() {
(None, None)
} else {
let ignore_variant = quote!(__ignore,);
let fallthrough = quote!(_serde::#private::Ok(__Field::__ignore));
(Some(ignore_variant), Some(fallthrough))
};
Stmts(identifier::generate_identifier(
deserialized_fields,
has_flatten,
false,
ignore_variant,
fallthrough,
))
}

98
serde_derive/src/de/tuple.rs
View File

@ -131,6 +131,55 @@ pub fn generate_body(
}
}
fn deserialize_newtype_struct(
type_path: &TokenStream,
params: &Parameters,
field: &Field,
) -> TokenStream {
let delife = params.borrowed.de_lifetime();
let field_ty = field.ty;
let deserializer_var = quote!(__e);
let value = match field.attrs.deserialize_with() {
None => {
let span = field.original.span();
let func = quote_spanned!(span=> <#field_ty as _serde::Deserialize>::deserialize);
quote! {
#func(#deserializer_var)?
}
}
Some(path) => {
// If #path returns wrong type, error will be reported here (^^^^^).
// We attach span of the path to the function so it will be reported
// on the #[serde(with = "...")]
// ^^^^^
quote_spanned! {path.span()=>
#path(#deserializer_var)?
}
}
};
let mut result = quote!(#type_path(__field0));
if params.has_getter {
let this_type = &params.this_type;
let (_, ty_generics, _) = params.generics.split_for_impl();
result = quote! {
_serde::#private::Into::<#this_type #ty_generics>::into(#result)
};
}
quote! {
#[inline]
fn visit_newtype_struct<__E>(self, #deserializer_var: __E) -> _serde::#private::Result<Self::Value, __E::Error>
where
__E: _serde::Deserializer<#delife>,
{
let __field0: #field_ty = #value;
_serde::#private::Ok(#result)
}
}
}
/// Generates `Deserialize::deserialize_in_place` body for a `struct Tuple(...);` including `struct Newtype(T);`
#[cfg(feature = "deserialize_in_place")]
pub fn generate_body_in_place(
@ -230,52 +279,3 @@ pub fn generate_body_in_place(
#dispatch
}
}
fn deserialize_newtype_struct(
type_path: &TokenStream,
params: &Parameters,
field: &Field,
) -> TokenStream {
let delife = params.borrowed.de_lifetime();
let field_ty = field.ty;
let deserializer_var = quote!(__e);
let value = match field.attrs.deserialize_with() {
None => {
let span = field.original.span();
let func = quote_spanned!(span=> <#field_ty as _serde::Deserialize>::deserialize);
quote! {
#func(#deserializer_var)?
}
}
Some(path) => {
// If #path returns wrong type, error will be reported here (^^^^^).
// We attach span of the path to the function so it will be reported
// on the #[serde(with = "...")]
// ^^^^^
quote_spanned! {path.span()=>
#path(#deserializer_var)?
}
}
};
let mut result = quote!(#type_path(__field0));
if params.has_getter {
let this_type = &params.this_type;
let (_, ty_generics, _) = params.generics.split_for_impl();
result = quote! {
_serde::#private::Into::<#this_type #ty_generics>::into(#result)
};
}
quote! {
#[inline]
fn visit_newtype_struct<__E>(self, #deserializer_var: __E) -> _serde::#private::Result<Self::Value, __E::Error>
where
__E: _serde::Deserializer<#delife>,
{
let __field0: #field_ty = #value;
_serde::#private::Ok(#result)
}
}
}