At my previous workplace we had a C macro that was something like
#define CheckWhatever(x__, true__, false__) \
whatever(x) ? (true__) : (false__)
I don't remember this shit, so I'm just paraphrasing cursed C. The question one would ask is... why? Well, because you also want to do
#define CheckWhatever2(x__, true__, false__) \
CheckWhatever((x__ ##1), (true__), (false__)) \
CheckWhatever((x__ ##2), (true__), (false__))
And, of course
#define CheckWhatever3(x__, true__, false__) \
CheckWhatever2((x__ ##1), (true__), (false__)) \
CheckWhatever2((x__ ##2), (true__), (false__))
Long story short, someone wanted to CheckWhatever6 inside another macro. While debugging code old enough to vote, my editor suggested expanding the macro, which expanded to ~1400 lines for a single ternary operator chain. Fun times!
I have bad news for you