Method key

native/thirdpart/json/json.hpp:4715–4730

    }

    bool key(string_t& val)
    {
        BasicJsonType k = BasicJsonType(val);

        // check callback for key
        const bool keep = callback(static_cast<int>(ref_stack.size()), parse_event_t::key, k);
        key_keep_stack.push_back(keep);

        // add discarded value at given key and store the reference for later
        if (keep and ref_stack.back())
        {
            object_element = &(ref_stack.back()->m_value.object->operator[](val) = discarded);
        }

        return true;
    }

    bool end_object()
    {