Function merge

include/jsoncons/basic_json.hpp:4278–4307

        // merge

        void merge(const basic_json& source)
        {
            switch (source.storage_kind())
            {
                case json_storage_kind::empty_object:
                    break;
                case json_storage_kind::object:
                    switch (storage_kind())
                    {
                        case json_storage_kind::empty_object:
                            create_object_implicitly();
                            cast<object_storage>().value().merge(source.cast<object_storage>().value());
                            break;
                        case json_storage_kind::object:
                            cast<object_storage>().value().merge(source.cast<object_storage>().value());
                            break;
                        case json_storage_kind::json_ref:
                            cast<json_ref_storage>().value().merge(source);
                            break;
                        default:
                            JSONCONS_THROW(json_runtime_error<std::domain_error>("Attempting to merge a value that is not an object"));
                    }
                    break;
                case json_storage_kind::json_ref:
                    merge(source.cast<json_ref_storage>().value());
                    break;
               default:
                   JSONCONS_THROW(json_runtime_error<std::domain_error>("Attempting to merge a value that is not an object"));
           }
        }

        void merge(basic_json&& source)
        {