On: Banned C standard library functions in Git source ...

[tlb]

Here is an implementation of coroutines on top of setjmp/longjmp: https://fanf.livejournal.com/105413.html

[superpermutat0r → tlb]

How does it work for arbitrary arguments? What about function pointers. What about calling a coroutine inside a coroutine?

It also has a stack managed in runtime. I'm not sure that would work for any other application than the fun example here.

[vasama → tlb]

Looks more like an implementation of undefined behaviour to me.

[dang → vasama]

"Please don't post shallow dismissals, especially of other people's work. A good critical comment teaches us something."

https://news.ycombinator.com/newsguidelines.html

[monocasa → vasama]

The underlying implementations define the behavior here very well.

[fanf2 → monocasa]

Well, I would not go that far. My coroutine hack relies on “unwarranted chumminess with the implementation” (http://c-faq.com/struct/structhack.html) and there are lots of incidental things that can break it. It is best treated as an example of the principles of thread switching and stack allocation.