mojo/public/tools/bindings/generators/cpp_templates/struct_serialization_declaration.tmpl

{%- import "struct_macros.tmpl" as struct_macros %}
{%- set data_view = struct|get_qualified_name_for_kind ~ "DataView" %}
{%- set data_type = struct|get_qualified_name_for_kind(internal=True) %}

namespace internal {

template <typename MaybeConstUserType>
struct Serializer<{{data_view}}, MaybeConstUserType> {
  using UserType = typename std::remove_const<MaybeConstUserType>::type;
  using Traits = StructTraits<{{data_view}}, UserType>;

  static size_t PrepareToSerialize(MaybeConstUserType& input,
                                   SerializationContext* context) {
    if (CallIsNullIfExists<Traits>(input))
      return 0;

    void* custom_context = CustomContextHelper<Traits>::SetUp(input, context);
    ALLOW_UNUSED_LOCAL(custom_context);

    {{struct_macros.get_serialized_size(
          struct, "CallWithContext(Traits::%s, input, custom_context)",
          "context", True)|indent(2)}}
    return size;
  }

  static void Serialize(MaybeConstUserType& input,
                        Buffer* buffer,
                        {{data_type}}** output,
                        SerializationContext* context) {
    if (CallIsNullIfExists<Traits>(input)) {
      *output = nullptr;
      return;
    }

    void* custom_context = CustomContextHelper<Traits>::GetNext(context);

    {{struct_macros.serialize(
          struct, struct.name ~ " struct",
          "CallWithContext(Traits::%s, input, custom_context)", "result",
          "buffer", "context", True)|indent(2)}}
    *output = result;

    CustomContextHelper<Traits>::TearDown(input, custom_context);
  }

  static bool Deserialize({{data_type}}* input,
                          UserType* output,
                          SerializationContext* context) {
    if (!input)
      return CallSetToNullIfExists<Traits>(output);

    {{data_view}} data_view(input, context);
    return Traits::Read(data_view, output);
  }
};

}  // namespace internal