[thomasjames]

I had only seen them in the context of userspace threading. I wonder what mainstream libs use them. Do you know of any?

[fucking_tragedy]

Generators are a subset of coroutines, and coroutines are useful in lexing and parsing.

[thomasjames]

Whoops, I meant that use set/longjmp() to implement coroutines. My wording in retrospect was super unclear. Sorry!