[pkolaczk]

Rust async streams or rayon come very close to what you describe as structured concurrency. Actually much closer than anything I saw in other mainstream languages eg Java or Go.

[empath75]

Rayon is about as pure an example of it as you can imagine. In a lot of cases you just need to replace iter() with par_iter() and it just works.

[masklinn]

scoped threads as well, though at a lower level of semantics (and probably less efficiently due to not being on top of a thread pool).

[seanw444]

> Actually much closer than anything I saw in other mainstream languages eg Java or Go.

https://github.com/sourcegraph/conc