Hi, I (Shuxian) worked with Michael on this project. Happy to answer any questions! We'll also post a followup next week on formally verifying our unsafe primitives in the style of RustBelt (https://plv.mpi-sws.org/rustbelt), if that interests you.
I'm the author.
Thanks for the interest; I've never had a post on Hacker News before.
I'm happy to answer any questions.
Pretty sure I’ve done similar, combined a Rust multi-threaded emulator with single threaded SystemC simulation
Seems like objc2 crate uses same approach (MainThreadMarker).
It would be more interesting if it was on how to combine C++20 co-routines with Rust async-await models.
Combining single-threaded C++ with multi-threaded languages has been a thing for quite some time.