Function empty

third-party/nlohmann/include/nlohmann/json.hpp:2641–2676

@brief checks whether the container is empty. @sa https://json.nlohmann.me/api/basic_json/empty/

    /// @brief checks whether the container is empty.
    /// @sa https://json.nlohmann.me/api/basic_json/empty/
    bool empty() const noexcept
    {
        switch (m_type)
        {
            case value_t::null:
            {
                // null values are empty
                return true;
            }

            case value_t::array:
            {
                // delegate call to array_t::empty()
                return m_value.array->empty();
            }

            case value_t::object:
            {
                // delegate call to object_t::empty()
                return m_value.object->empty();
            }

            case value_t::string:
            case value_t::boolean:
            case value_t::number_integer:
            case value_t::number_unsigned:
            case value_t::number_float:
            case value_t::binary:
            case value_t::discarded:
            default:
            {
                // all other types are nonempty
                return false;
            }
        }
    }

    /// @brief returns the number of elements
    /// @sa https://json.nlohmann.me/api/basic_json/size/