Method add_node

src/config/implementation.hpp:3711–3736

    // Emplace/Insert

    inline node_pointer add_node(node_pointer n, std::size_t key_hash)
    {
        n->hash_ = key_hash;

        bucket_pointer b = this->get_bucket(this->hash_to_bucket(key_hash));

        if (!b->next_) {
            link_pointer start_node = this->get_previous_start();

            if (start_node->next_) {
                this->get_bucket(this->hash_to_bucket(
                                     node_algo::next_node(start_node)->hash_))
                    ->next_ = n;
            }

            b->next_ = start_node;
            n->next_ = start_node->next_;
            start_node->next_ = n;
        } else {
            n->next_ = b->next_->next_;
            b->next_->next_ = n;
        }

        ++this->size_;
        return n;
    }

    inline node_pointer resize_and_add_node(
        node_pointer n, std::size_t key_hash)