Function gen_variants_fields_info

rust/fory-derive/src/object/derive_enum.rs:236–277

(enum_name: &syn::Ident, data_enum: &DataEnum)

}

pub fn gen_variants_fields_info(enum_name: &syn::Ident, data_enum: &DataEnum) -> TokenStream {
    let variant_info: Vec<TokenStream> = data_enum
        .variants
        .iter()
        .filter(|v| !is_runtime_unknown_variant(v))
        .map(|v| {
            let variant_name = v.ident.to_string();
            match &v.fields {
                Fields::Named(_fields_named) => {
                    // Generate meta type identifier for this named variant
                    let meta_type_ident = Ident::new(
                        &format!("{}_{}VariantMeta", enum_name, v.ident),
                        proc_macro2::Span::call_site()
                    );
                    quote! {
                        (
                            #variant_name.to_string(),
                            ::std::any::TypeId::of::<#meta_type_ident>(),
                            <#meta_type_ident as fory_core::serializer::enum_::NamedEnumVariantMetaTrait>::fory_fields_info(type_resolver)?
                        )
                    }
                }
                _ => {
                    // Unit or unnamed variants - return empty field info
                    quote! {
                        (
                            #variant_name.to_string(),
                            ::std::any::TypeId::of::<()>(), // Placeholder type ID
                            ::std::vec::Vec::new()
                        )
                    }
                }
            }
        })
        .collect();

    quote! {
        ::std::result::Result::Ok(::std::vec![
            #(#variant_info),*
        ])
    }
}

pub fn gen_reserved_space() -> TokenStream {
    quote! {