Function size

include/behaviortree_cpp/contrib/json.hpp:22247–22282

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

    /// @brief returns the number of elements
    /// @sa https://json.nlohmann.me/api/basic_json/size/
    size_type size() const noexcept
    {
        switch (m_data.m_type)
        {
            case value_t::null:
            {
                // null values are empty
                return 0;
            }

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

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

            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 have size 1
                return 1;
            }
        }
    }

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