mirror of
https://github.com/pezkuwichain/serde.git
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Move body generator for adjacently tagged enums to its own module
Cut-paste
This commit is contained in:
Mingun
+3
-307
@@ -12,6 +12,8 @@ use syn::punctuated::Punctuated;
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use syn::spanned::Spanned;
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use syn::spanned::Spanned;
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use syn::{parse_quote, Ident, Index, Member};
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use syn::{parse_quote, Ident, Index, Member};
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mod enum_adjacently;
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pub fn expand_derive_deserialize(input: &mut syn::DeriveInput) -> syn::Result<TokenStream> {
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pub fn expand_derive_deserialize(input: &mut syn::DeriveInput) -> syn::Result<TokenStream> {
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replace_receiver(input);
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replace_receiver(input);
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@@ -1262,7 +1264,7 @@ fn deserialize_homogeneous_enum(
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deserialize_internally_tagged_enum(params, variants, cattrs, tag)
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deserialize_internally_tagged_enum(params, variants, cattrs, tag)
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}
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}
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attr::TagType::Adjacent { tag, content } => {
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attr::TagType::Adjacent { tag, content } => {
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deserialize_adjacently_tagged_enum(params, variants, cattrs, tag, content)
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enum_adjacently::deserialize_adjacently_tagged_enum(params, variants, cattrs, tag, content)
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}
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}
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attr::TagType::None => deserialize_untagged_enum(params, variants, cattrs, None),
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attr::TagType::None => deserialize_untagged_enum(params, variants, cattrs, None),
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}
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}
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@@ -1449,312 +1451,6 @@ fn deserialize_internally_tagged_enum(
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}
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}
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}
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}
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/// Generates `Deserialize::deserialize` body for an `enum Enum {...}` with `#[serde(tag, content)]` attributes
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fn deserialize_adjacently_tagged_enum(
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params: &Parameters,
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variants: &[Variant],
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cattrs: &attr::Container,
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tag: &str,
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content: &str,
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) -> Fragment {
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let this_type = ¶ms.this_type;
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let this_value = ¶ms.this_value;
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let (de_impl_generics, de_ty_generics, ty_generics, where_clause) = params.generics();
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let delife = params.borrowed.de_lifetime();
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let (variants_stmt, variant_visitor) = prepare_enum_variant_enum(variants);
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let variant_arms: &Vec<_> = &variants
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.iter()
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.enumerate()
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.filter(|&(_, variant)| !variant.attrs.skip_deserializing())
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.map(|(i, variant)| {
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let variant_index = field_i(i);
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let block = Match(deserialize_untagged_variant(params, variant, cattrs));
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quote! {
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__Field::#variant_index => #block
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}
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})
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.collect();
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let rust_name = params.type_name();
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let expecting = format!("adjacently tagged enum {}", rust_name);
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let expecting = cattrs.expecting().unwrap_or(&expecting);
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let type_name = cattrs.name().deserialize_name();
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let deny_unknown_fields = cattrs.deny_unknown_fields();
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// If unknown fields are allowed, we pick the visitor that can step over
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// those. Otherwise we pick the visitor that fails on unknown keys.
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let field_visitor_ty = if deny_unknown_fields {
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quote! { _serde::#private::de::TagOrContentFieldVisitor }
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} else {
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quote! { _serde::#private::de::TagContentOtherFieldVisitor }
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};
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let mut missing_content = quote! {
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_serde::#private::Err(<__A::Error as _serde::de::Error>::missing_field(#content))
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};
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let mut missing_content_fallthrough = quote!();
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let missing_content_arms = variants
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.iter()
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.enumerate()
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.filter(|&(_, variant)| !variant.attrs.skip_deserializing())
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.filter_map(|(i, variant)| {
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let variant_index = field_i(i);
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let variant_ident = &variant.ident;
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let arm = match variant.style {
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Style::Unit => quote! {
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_serde::#private::Ok(#this_value::#variant_ident)
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},
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Style::Newtype if variant.attrs.deserialize_with().is_none() => {
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let span = variant.original.span();
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let func = quote_spanned!(span=> _serde::#private::de::missing_field);
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quote! {
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#func(#content).map(#this_value::#variant_ident)
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}
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}
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_ => {
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missing_content_fallthrough = quote!(_ => #missing_content);
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return None;
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}
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};
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Some(quote! {
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__Field::#variant_index => #arm,
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})
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})
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.collect::<Vec<_>>();
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if !missing_content_arms.is_empty() {
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missing_content = quote! {
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match __field {
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#(#missing_content_arms)*
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#missing_content_fallthrough
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}
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};
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}
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// Advance the map by one key, returning early in case of error.
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let next_key = quote! {
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_serde::de::MapAccess::next_key_seed(&mut __map, #field_visitor_ty {
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tag: #tag,
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content: #content,
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})?
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};
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let variant_from_map = quote! {
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_serde::de::MapAccess::next_value_seed(&mut __map, _serde::#private::de::AdjacentlyTaggedEnumVariantSeed::<__Field> {
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enum_name: #rust_name,
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variants: VARIANTS,
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fields_enum: _serde::#private::PhantomData
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})?
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};
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// When allowing unknown fields, we want to transparently step through keys
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// we don't care about until we find `tag`, `content`, or run out of keys.
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let next_relevant_key = if deny_unknown_fields {
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next_key
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} else {
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quote!({
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let mut __rk : _serde::#private::Option<_serde::#private::de::TagOrContentField> = _serde::#private::None;
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while let _serde::#private::Some(__k) = #next_key {
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match __k {
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_serde::#private::de::TagContentOtherField::Other => {
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let _ = _serde::de::MapAccess::next_value::<_serde::de::IgnoredAny>(&mut __map)?;
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continue;
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},
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_serde::#private::de::TagContentOtherField::Tag => {
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__rk = _serde::#private::Some(_serde::#private::de::TagOrContentField::Tag);
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break;
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}
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_serde::#private::de::TagContentOtherField::Content => {
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__rk = _serde::#private::Some(_serde::#private::de::TagOrContentField::Content);
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break;
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}
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}
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}
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__rk
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})
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};
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// Step through remaining keys, looking for duplicates of previously-seen
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// keys. When unknown fields are denied, any key that isn't a duplicate will
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// at this point immediately produce an error.
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let visit_remaining_keys = quote! {
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match #next_relevant_key {
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_serde::#private::Some(_serde::#private::de::TagOrContentField::Tag) => {
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_serde::#private::Err(<__A::Error as _serde::de::Error>::duplicate_field(#tag))
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}
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_serde::#private::Some(_serde::#private::de::TagOrContentField::Content) => {
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_serde::#private::Err(<__A::Error as _serde::de::Error>::duplicate_field(#content))
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}
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_serde::#private::None => _serde::#private::Ok(__ret),
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}
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};
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let finish_content_then_tag = if variant_arms.is_empty() {
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quote! {
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match #variant_from_map {}
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}
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} else {
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quote! {
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let __seed = __Seed {
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variant: #variant_from_map,
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marker: _serde::#private::PhantomData,
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lifetime: _serde::#private::PhantomData,
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};
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let __deserializer = _serde::#private::de::ContentDeserializer::<__A::Error>::new(__content);
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let __ret = _serde::de::DeserializeSeed::deserialize(__seed, __deserializer)?;
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// Visit remaining keys, looking for duplicates.
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#visit_remaining_keys
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}
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};
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quote_block! {
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#variant_visitor
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#variants_stmt
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#[doc(hidden)]
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struct __Seed #de_impl_generics #where_clause {
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variant: __Field,
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marker: _serde::#private::PhantomData<#this_type #ty_generics>,
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lifetime: _serde::#private::PhantomData<&#delife ()>,
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}
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#[automatically_derived]
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impl #de_impl_generics _serde::de::DeserializeSeed<#delife> for __Seed #de_ty_generics #where_clause {
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type Value = #this_type #ty_generics;
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fn deserialize<__D>(self, __deserializer: __D) -> _serde::#private::Result<Self::Value, __D::Error>
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where
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__D: _serde::Deserializer<#delife>,
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{
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match self.variant {
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#(#variant_arms)*
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}
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}
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}
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#[doc(hidden)]
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struct __Visitor #de_impl_generics #where_clause {
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marker: _serde::#private::PhantomData<#this_type #ty_generics>,
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lifetime: _serde::#private::PhantomData<&#delife ()>,
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}
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#[automatically_derived]
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impl #de_impl_generics _serde::de::Visitor<#delife> for __Visitor #de_ty_generics #where_clause {
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type Value = #this_type #ty_generics;
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fn expecting(&self, __formatter: &mut _serde::#private::Formatter) -> _serde::#private::fmt::Result {
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_serde::#private::Formatter::write_str(__formatter, #expecting)
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}
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fn visit_map<__A>(self, mut __map: __A) -> _serde::#private::Result<Self::Value, __A::Error>
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where
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__A: _serde::de::MapAccess<#delife>,
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{
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// Visit the first relevant key.
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match #next_relevant_key {
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// First key is the tag.
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_serde::#private::Some(_serde::#private::de::TagOrContentField::Tag) => {
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// Parse the tag.
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let __field = #variant_from_map;
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// Visit the second key.
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match #next_relevant_key {
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// Second key is a duplicate of the tag.
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_serde::#private::Some(_serde::#private::de::TagOrContentField::Tag) => {
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_serde::#private::Err(<__A::Error as _serde::de::Error>::duplicate_field(#tag))
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}
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// Second key is the content.
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_serde::#private::Some(_serde::#private::de::TagOrContentField::Content) => {
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let __ret = _serde::de::MapAccess::next_value_seed(&mut __map,
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__Seed {
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variant: __field,
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marker: _serde::#private::PhantomData,
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lifetime: _serde::#private::PhantomData,
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})?;
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// Visit remaining keys, looking for duplicates.
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#visit_remaining_keys
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}
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// There is no second key; might be okay if the we have a unit variant.
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_serde::#private::None => #missing_content
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}
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}
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// First key is the content.
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_serde::#private::Some(_serde::#private::de::TagOrContentField::Content) => {
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// Buffer up the content.
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let __content = _serde::de::MapAccess::next_value_seed(&mut __map, _serde::#private::de::ContentVisitor::new())?;
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// Visit the second key.
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match #next_relevant_key {
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// Second key is the tag.
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_serde::#private::Some(_serde::#private::de::TagOrContentField::Tag) => {
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#finish_content_then_tag
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}
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// Second key is a duplicate of the content.
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_serde::#private::Some(_serde::#private::de::TagOrContentField::Content) => {
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_serde::#private::Err(<__A::Error as _serde::de::Error>::duplicate_field(#content))
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}
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// There is no second key.
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_serde::#private::None => {
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_serde::#private::Err(<__A::Error as _serde::de::Error>::missing_field(#tag))
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}
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}
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}
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// There is no first key.
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_serde::#private::None => {
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_serde::#private::Err(<__A::Error as _serde::de::Error>::missing_field(#tag))
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}
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}
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}
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fn visit_seq<__A>(self, mut __seq: __A) -> _serde::#private::Result<Self::Value, __A::Error>
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where
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__A: _serde::de::SeqAccess<#delife>,
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{
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// Visit the first element - the tag.
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match _serde::de::SeqAccess::next_element(&mut __seq)? {
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_serde::#private::Some(__variant) => {
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// Visit the second element - the content.
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match _serde::de::SeqAccess::next_element_seed(
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&mut __seq,
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__Seed {
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variant: __variant,
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marker: _serde::#private::PhantomData,
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lifetime: _serde::#private::PhantomData,
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},
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)? {
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_serde::#private::Some(__ret) => _serde::#private::Ok(__ret),
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// There is no second element.
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_serde::#private::None => {
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_serde::#private::Err(_serde::de::Error::invalid_length(1, &self))
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}
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}
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}
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// There is no first element.
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_serde::#private::None => {
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_serde::#private::Err(_serde::de::Error::invalid_length(0, &self))
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}
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}
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}
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}
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#[doc(hidden)]
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const FIELDS: &'static [&'static str] = &[#tag, #content];
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_serde::Deserializer::deserialize_struct(
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__deserializer,
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#type_name,
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FIELDS,
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__Visitor {
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marker: _serde::#private::PhantomData::<#this_type #ty_generics>,
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lifetime: _serde::#private::PhantomData,
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},
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)
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}
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}
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/// Generates `Deserialize::deserialize` body for an `enum Enum {...}` with `#[serde(untagged)]` attribute
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/// Generates `Deserialize::deserialize` body for an `enum Enum {...}` with `#[serde(untagged)]` attribute
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fn deserialize_untagged_enum(
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fn deserialize_untagged_enum(
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params: &Parameters,
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params: &Parameters,
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||||||
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@@ -0,0 +1,320 @@
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//! Generator of the deserialization code for the adjacently tagged enums:
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||||||
|
//!
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||||||
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//! ```ignore
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||||||
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//! #[serde(tag = "...", content = "...")]
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||||||
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//! enum Enum {}
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//! ```
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|
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use crate::de::{deserialize_untagged_variant, field_i, prepare_enum_variant_enum, Parameters};
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||||||
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use crate::fragment::{Fragment, Match};
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use crate::internals::ast::{Style, Variant};
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||||||
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use crate::internals::attr;
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||||||
|
use crate::private;
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||||||
|
use quote::{quote, quote_spanned};
|
||||||
|
use syn::spanned::Spanned;
|
||||||
|
|
||||||
|
/// Generates `Deserialize::deserialize` body for an `enum Enum {...}` with `#[serde(tag, content)]` attributes
|
||||||
|
pub fn deserialize_adjacently_tagged_enum(
|
||||||
|
params: &Parameters,
|
||||||
|
variants: &[Variant],
|
||||||
|
cattrs: &attr::Container,
|
||||||
|
tag: &str,
|
||||||
|
content: &str,
|
||||||
|
) -> Fragment {
|
||||||
|
let this_type = ¶ms.this_type;
|
||||||
|
let this_value = ¶ms.this_value;
|
||||||
|
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);
|
||||||
|
|
||||||
|
let variant_arms: &Vec<_> = &variants
|
||||||
|
.iter()
|
||||||
|
.enumerate()
|
||||||
|
.filter(|&(_, variant)| !variant.attrs.skip_deserializing())
|
||||||
|
.map(|(i, variant)| {
|
||||||
|
let variant_index = field_i(i);
|
||||||
|
|
||||||
|
let block = Match(deserialize_untagged_variant(params, variant, cattrs));
|
||||||
|
|
||||||
|
quote! {
|
||||||
|
__Field::#variant_index => #block
|
||||||
|
}
|
||||||
|
})
|
||||||
|
.collect();
|
||||||
|
|
||||||
|
let rust_name = params.type_name();
|
||||||
|
let expecting = format!("adjacently tagged enum {}", rust_name);
|
||||||
|
let expecting = cattrs.expecting().unwrap_or(&expecting);
|
||||||
|
let type_name = cattrs.name().deserialize_name();
|
||||||
|
let deny_unknown_fields = cattrs.deny_unknown_fields();
|
||||||
|
|
||||||
|
// If unknown fields are allowed, we pick the visitor that can step over
|
||||||
|
// those. Otherwise we pick the visitor that fails on unknown keys.
|
||||||
|
let field_visitor_ty = if deny_unknown_fields {
|
||||||
|
quote! { _serde::#private::de::TagOrContentFieldVisitor }
|
||||||
|
} else {
|
||||||
|
quote! { _serde::#private::de::TagContentOtherFieldVisitor }
|
||||||
|
};
|
||||||
|
|
||||||
|
let mut missing_content = quote! {
|
||||||
|
_serde::#private::Err(<__A::Error as _serde::de::Error>::missing_field(#content))
|
||||||
|
};
|
||||||
|
let mut missing_content_fallthrough = quote!();
|
||||||
|
let missing_content_arms = variants
|
||||||
|
.iter()
|
||||||
|
.enumerate()
|
||||||
|
.filter(|&(_, variant)| !variant.attrs.skip_deserializing())
|
||||||
|
.filter_map(|(i, variant)| {
|
||||||
|
let variant_index = field_i(i);
|
||||||
|
let variant_ident = &variant.ident;
|
||||||
|
|
||||||
|
let arm = match variant.style {
|
||||||
|
Style::Unit => quote! {
|
||||||
|
_serde::#private::Ok(#this_value::#variant_ident)
|
||||||
|
},
|
||||||
|
Style::Newtype if variant.attrs.deserialize_with().is_none() => {
|
||||||
|
let span = variant.original.span();
|
||||||
|
let func = quote_spanned!(span=> _serde::#private::de::missing_field);
|
||||||
|
quote! {
|
||||||
|
#func(#content).map(#this_value::#variant_ident)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
_ => {
|
||||||
|
missing_content_fallthrough = quote!(_ => #missing_content);
|
||||||
|
return None;
|
||||||
|
}
|
||||||
|
};
|
||||||
|
Some(quote! {
|
||||||
|
__Field::#variant_index => #arm,
|
||||||
|
})
|
||||||
|
})
|
||||||
|
.collect::<Vec<_>>();
|
||||||
|
if !missing_content_arms.is_empty() {
|
||||||
|
missing_content = quote! {
|
||||||
|
match __field {
|
||||||
|
#(#missing_content_arms)*
|
||||||
|
#missing_content_fallthrough
|
||||||
|
}
|
||||||
|
};
|
||||||
|
}
|
||||||
|
|
||||||
|
// Advance the map by one key, returning early in case of error.
|
||||||
|
let next_key = quote! {
|
||||||
|
_serde::de::MapAccess::next_key_seed(&mut __map, #field_visitor_ty {
|
||||||
|
tag: #tag,
|
||||||
|
content: #content,
|
||||||
|
})?
|
||||||
|
};
|
||||||
|
|
||||||
|
let variant_from_map = quote! {
|
||||||
|
_serde::de::MapAccess::next_value_seed(&mut __map, _serde::#private::de::AdjacentlyTaggedEnumVariantSeed::<__Field> {
|
||||||
|
enum_name: #rust_name,
|
||||||
|
variants: VARIANTS,
|
||||||
|
fields_enum: _serde::#private::PhantomData
|
||||||
|
})?
|
||||||
|
};
|
||||||
|
|
||||||
|
// When allowing unknown fields, we want to transparently step through keys
|
||||||
|
// we don't care about until we find `tag`, `content`, or run out of keys.
|
||||||
|
let next_relevant_key = if deny_unknown_fields {
|
||||||
|
next_key
|
||||||
|
} else {
|
||||||
|
quote!({
|
||||||
|
let mut __rk : _serde::#private::Option<_serde::#private::de::TagOrContentField> = _serde::#private::None;
|
||||||
|
while let _serde::#private::Some(__k) = #next_key {
|
||||||
|
match __k {
|
||||||
|
_serde::#private::de::TagContentOtherField::Other => {
|
||||||
|
let _ = _serde::de::MapAccess::next_value::<_serde::de::IgnoredAny>(&mut __map)?;
|
||||||
|
continue;
|
||||||
|
},
|
||||||
|
_serde::#private::de::TagContentOtherField::Tag => {
|
||||||
|
__rk = _serde::#private::Some(_serde::#private::de::TagOrContentField::Tag);
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
_serde::#private::de::TagContentOtherField::Content => {
|
||||||
|
__rk = _serde::#private::Some(_serde::#private::de::TagOrContentField::Content);
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
__rk
|
||||||
|
})
|
||||||
|
};
|
||||||
|
|
||||||
|
// Step through remaining keys, looking for duplicates of previously-seen
|
||||||
|
// keys. When unknown fields are denied, any key that isn't a duplicate will
|
||||||
|
// at this point immediately produce an error.
|
||||||
|
let visit_remaining_keys = quote! {
|
||||||
|
match #next_relevant_key {
|
||||||
|
_serde::#private::Some(_serde::#private::de::TagOrContentField::Tag) => {
|
||||||
|
_serde::#private::Err(<__A::Error as _serde::de::Error>::duplicate_field(#tag))
|
||||||
|
}
|
||||||
|
_serde::#private::Some(_serde::#private::de::TagOrContentField::Content) => {
|
||||||
|
_serde::#private::Err(<__A::Error as _serde::de::Error>::duplicate_field(#content))
|
||||||
|
}
|
||||||
|
_serde::#private::None => _serde::#private::Ok(__ret),
|
||||||
|
}
|
||||||
|
};
|
||||||
|
|
||||||
|
let finish_content_then_tag = if variant_arms.is_empty() {
|
||||||
|
quote! {
|
||||||
|
match #variant_from_map {}
|
||||||
|
}
|
||||||
|
} else {
|
||||||
|
quote! {
|
||||||
|
let __seed = __Seed {
|
||||||
|
variant: #variant_from_map,
|
||||||
|
marker: _serde::#private::PhantomData,
|
||||||
|
lifetime: _serde::#private::PhantomData,
|
||||||
|
};
|
||||||
|
let __deserializer = _serde::#private::de::ContentDeserializer::<__A::Error>::new(__content);
|
||||||
|
let __ret = _serde::de::DeserializeSeed::deserialize(__seed, __deserializer)?;
|
||||||
|
// Visit remaining keys, looking for duplicates.
|
||||||
|
#visit_remaining_keys
|
||||||
|
}
|
||||||
|
};
|
||||||
|
|
||||||
|
quote_block! {
|
||||||
|
#variant_visitor
|
||||||
|
|
||||||
|
#variants_stmt
|
||||||
|
|
||||||
|
#[doc(hidden)]
|
||||||
|
struct __Seed #de_impl_generics #where_clause {
|
||||||
|
variant: __Field,
|
||||||
|
marker: _serde::#private::PhantomData<#this_type #ty_generics>,
|
||||||
|
lifetime: _serde::#private::PhantomData<&#delife ()>,
|
||||||
|
}
|
||||||
|
|
||||||
|
#[automatically_derived]
|
||||||
|
impl #de_impl_generics _serde::de::DeserializeSeed<#delife> for __Seed #de_ty_generics #where_clause {
|
||||||
|
type Value = #this_type #ty_generics;
|
||||||
|
|
||||||
|
fn deserialize<__D>(self, __deserializer: __D) -> _serde::#private::Result<Self::Value, __D::Error>
|
||||||
|
where
|
||||||
|
__D: _serde::Deserializer<#delife>,
|
||||||
|
{
|
||||||
|
match self.variant {
|
||||||
|
#(#variant_arms)*
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
#[doc(hidden)]
|
||||||
|
struct __Visitor #de_impl_generics #where_clause {
|
||||||
|
marker: _serde::#private::PhantomData<#this_type #ty_generics>,
|
||||||
|
lifetime: _serde::#private::PhantomData<&#delife ()>,
|
||||||
|
}
|
||||||
|
|
||||||
|
#[automatically_derived]
|
||||||
|
impl #de_impl_generics _serde::de::Visitor<#delife> for __Visitor #de_ty_generics #where_clause {
|
||||||
|
type Value = #this_type #ty_generics;
|
||||||
|
|
||||||
|
fn expecting(&self, __formatter: &mut _serde::#private::Formatter) -> _serde::#private::fmt::Result {
|
||||||
|
_serde::#private::Formatter::write_str(__formatter, #expecting)
|
||||||
|
}
|
||||||
|
|
||||||
|
fn visit_map<__A>(self, mut __map: __A) -> _serde::#private::Result<Self::Value, __A::Error>
|
||||||
|
where
|
||||||
|
__A: _serde::de::MapAccess<#delife>,
|
||||||
|
{
|
||||||
|
// Visit the first relevant key.
|
||||||
|
match #next_relevant_key {
|
||||||
|
// First key is the tag.
|
||||||
|
_serde::#private::Some(_serde::#private::de::TagOrContentField::Tag) => {
|
||||||
|
// Parse the tag.
|
||||||
|
let __field = #variant_from_map;
|
||||||
|
// Visit the second key.
|
||||||
|
match #next_relevant_key {
|
||||||
|
// Second key is a duplicate of the tag.
|
||||||
|
_serde::#private::Some(_serde::#private::de::TagOrContentField::Tag) => {
|
||||||
|
_serde::#private::Err(<__A::Error as _serde::de::Error>::duplicate_field(#tag))
|
||||||
|
}
|
||||||
|
// Second key is the content.
|
||||||
|
_serde::#private::Some(_serde::#private::de::TagOrContentField::Content) => {
|
||||||
|
let __ret = _serde::de::MapAccess::next_value_seed(&mut __map,
|
||||||
|
__Seed {
|
||||||
|
variant: __field,
|
||||||
|
marker: _serde::#private::PhantomData,
|
||||||
|
lifetime: _serde::#private::PhantomData,
|
||||||
|
})?;
|
||||||
|
// Visit remaining keys, looking for duplicates.
|
||||||
|
#visit_remaining_keys
|
||||||
|
}
|
||||||
|
// There is no second key; might be okay if the we have a unit variant.
|
||||||
|
_serde::#private::None => #missing_content
|
||||||
|
}
|
||||||
|
}
|
||||||
|
// First key is the content.
|
||||||
|
_serde::#private::Some(_serde::#private::de::TagOrContentField::Content) => {
|
||||||
|
// Buffer up the content.
|
||||||
|
let __content = _serde::de::MapAccess::next_value_seed(&mut __map, _serde::#private::de::ContentVisitor::new())?;
|
||||||
|
// Visit the second key.
|
||||||
|
match #next_relevant_key {
|
||||||
|
// Second key is the tag.
|
||||||
|
_serde::#private::Some(_serde::#private::de::TagOrContentField::Tag) => {
|
||||||
|
#finish_content_then_tag
|
||||||
|
}
|
||||||
|
// Second key is a duplicate of the content.
|
||||||
|
_serde::#private::Some(_serde::#private::de::TagOrContentField::Content) => {
|
||||||
|
_serde::#private::Err(<__A::Error as _serde::de::Error>::duplicate_field(#content))
|
||||||
|
}
|
||||||
|
// There is no second key.
|
||||||
|
_serde::#private::None => {
|
||||||
|
_serde::#private::Err(<__A::Error as _serde::de::Error>::missing_field(#tag))
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
// There is no first key.
|
||||||
|
_serde::#private::None => {
|
||||||
|
_serde::#private::Err(<__A::Error as _serde::de::Error>::missing_field(#tag))
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
fn visit_seq<__A>(self, mut __seq: __A) -> _serde::#private::Result<Self::Value, __A::Error>
|
||||||
|
where
|
||||||
|
__A: _serde::de::SeqAccess<#delife>,
|
||||||
|
{
|
||||||
|
// Visit the first element - the tag.
|
||||||
|
match _serde::de::SeqAccess::next_element(&mut __seq)? {
|
||||||
|
_serde::#private::Some(__variant) => {
|
||||||
|
// Visit the second element - the content.
|
||||||
|
match _serde::de::SeqAccess::next_element_seed(
|
||||||
|
&mut __seq,
|
||||||
|
__Seed {
|
||||||
|
variant: __variant,
|
||||||
|
marker: _serde::#private::PhantomData,
|
||||||
|
lifetime: _serde::#private::PhantomData,
|
||||||
|
},
|
||||||
|
)? {
|
||||||
|
_serde::#private::Some(__ret) => _serde::#private::Ok(__ret),
|
||||||
|
// There is no second element.
|
||||||
|
_serde::#private::None => {
|
||||||
|
_serde::#private::Err(_serde::de::Error::invalid_length(1, &self))
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
// There is no first element.
|
||||||
|
_serde::#private::None => {
|
||||||
|
_serde::#private::Err(_serde::de::Error::invalid_length(0, &self))
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
#[doc(hidden)]
|
||||||
|
const FIELDS: &'static [&'static str] = &[#tag, #content];
|
||||||
|
_serde::Deserializer::deserialize_struct(
|
||||||
|
__deserializer,
|
||||||
|
#type_name,
|
||||||
|
FIELDS,
|
||||||
|
__Visitor {
|
||||||
|
marker: _serde::#private::PhantomData::<#this_type #ty_generics>,
|
||||||
|
lifetime: _serde::#private::PhantomData,
|
||||||
|
},
|
||||||
|
)
|
||||||
|
}
|
||||||
|
}
|
||||||
Reference in New Issue
Block a user