Method do_add

src/core/impl/utils/metahelper.cpp:18–22

}

void UserDataContainer::do_add(Typeinfo* type, std::shared_ptr<UserData> data) {
    auto ins = m_refkeeper.emplace(std::move(data));
    mgb_assert(ins.second, "duplicated user data: %p", ins.first->get());
    m_storage[type].push_back(ins.first->get());
}

std::pair<void* const*, size_t> UserDataContainer::do_get(Typeinfo* type) const {
    auto iter = m_storage.find(type);