> You cannot use it for values that you want to return from the function I would say this is only half true. With some macro magic you can actually also return

> You cannot use it for values that you want to return from the function I would say this is only half true. With some macro magic you can actually also return the values :) https://github.com/systemd/systemd/blob/0201114bb7f347015ed4d85256637921dc304fe0/src/fundamental/macro-fundamental.h#L413-L422 https://github.com/systemd/systemd/blob/0201114bb7f347015ed4... To be fair though, you probably meant without any such shenanigans.