Function gen_read_single_payload

rust/fory-derive/src/object/derive_enum.rs:187–199

(source_fields: &[SourceField<'_>])

}

fn gen_read_single_payload(source_fields: &[SourceField<'_>]) -> TokenStream {
    match build_bindings(source_fields) {
        Ok(bindings) => match bindings.as_slice() {
            [FieldBinding::Codec(binding)] => binding
                .read_with_mode_expr(quote! { fory_core::RefMode::Tracking }, quote! { true }),
            [FieldBinding::Skipped(_)] => {
                quote! { compile_error!("skip is not valid for union payload fields") }
            }
            _ => quote! { compile_error!("union payload helper requires exactly one field") },
        },
        Err(err) => err.to_compile_error(),
    }
}

/// For Union-compatible enums with data variants, return UNION TypeId in xlang mode.
pub fn gen_actual_type_id(data_enum: &DataEnum) -> TokenStream {