[info]
type_name = "std::reference_wrapper"
ctype = "REF_WRAPPER_TYPE"
header = "functional"

# Old:
typeName = "std::reference_wrapper<"
ns = ["namespace std"]
numTemplateParams = 1
replaceTemplateParamIndex = []

[codegen]
decl = """
template<typename T>
void getSizeType(const %1%<T> &ref, size_t& returnArg);
"""

func = """
template<typename T>
void getSizeType(const %1%<T> &ref, size_t& returnArg)
{
    SAVE_SIZE(sizeof(%1%<T>));
    SAVE_DATA((uintptr_t)&(ref.get()));
    if (ctx.pointers.add((uintptr_t)&ref.get())) {
        SAVE_DATA(1);
        getSizeType(ref.get(), returnArg);
    } else {
        SAVE_DATA(0);
    }
}
"""

traversal_func = """
auto tail = returnArg.write((uintptr_t)&(container.get()));

if (ctx.pointers.add((uintptr_t)&container.get())) {
  return tail.template delegate<1>([&ctx, &container](auto ret) {
    return OIInternal::getSizeType<Ctx>(ctx, container.get(), ret);
  });
} else {
  return tail.template delegate<0>(std::identity());
}
"""

[[codegen.processor]]
type = "types::st::VarInt<DB>"
func = """
el.pointer = std::get<ParsedData::VarInt>(d.val).value;
"""

[[codegen.processor]]
type = """
types::st::Sum<DB,
  types::st::Unit<DB>,
  typename TypeHandler<Ctx, T0>::type>
"""
func = """
auto sum = std::get<ParsedData::Sum>(d.val);
el.container_stats.emplace(result::Element::ContainerStats {
  .capacity = 1,
  .length = sum.index, // 0 if in a cycle, 1 otherwise
});

if constexpr (oi_is_complete<T0>) {
  if (sum.index == 1) {
    static constexpr auto element = make_field<Ctx, T0>("ref_val");
    stack_ins(element);
  }
}
"""