Let's write a setjmp
After learning about effect systems, and generalising effects, my view on `setjmp` has changed considerably -- it seems effect systems "effectively" offer a design pattern for their use in languages without them.ie., it feels that there's an async-await.h, try-catch.h, etc. to be written which would serve as c-ish design patterns. I'd be interested, then, in to what degree other langs can do the same.As a side point, i've not yet read a good defence of why programming in C is so fun and satisfying in this way. People reduce the Rust/C issue to memory saftey... but isn't there something inherently wonderful about `while(*this++ = *that++)` (etc. etc.) ?(A sense of fun beaten out of you by too many annotation guaranteeing its saftey?)