Seconding the idea that you don't use something like this prolifically. The point is to only go slightly past the limits of the tooling and still primarily be w

Seconding the idea that you don't use something like this prolifically. The point is to only go slightly past the limits of the tooling and still primarily be writing C in the style that C is best at. For similar reasons, "cute" macro-heavy C code tends not to survive long-term, because it breaks too much tooling.