> This is extraordinarily normal C code. I’ve worked with several large code bas...

steerablesafe · on July 2, 2020

Yes, a lot of C libraries reinvent dynamic dispatch with vtables or some other way. Sometimes they reinvent exceptions as well with longjmp.

enriquto · on July 2, 2020

> reinvent exceptions as well with longjmp.

What a bizarre way to phrase it. Shouldn't it be the other way round? Exceptions are just a "reinvention" of longjmp under a different name (yet identically noxious to program readability).

richardwhiuk · on July 2, 2020

Exceptions are a programming flow control concept.

longjump is a specific family of processor op codes.

This is the same idea that while loops are implemented using goto.

gjvc · on July 2, 2020

Well then, I agree with jnwatson.

miohtama · on July 2, 2020

Other C vtable implementations

- GTK (Gnome / GIMP)

- COM (Windows - though it is more intervined with C++)

- Quake / Doom and other old game engines though nobody uses C anymore today