stop_when(sender) and timeout_after(scheduler, duration)

[nebkat]

One of the use cases of std::execution I am most excited about is simplification of asynchronous operations with timeouts.

I have thus far been able to achieve a partial result using:

exec::when_any(
    stdexec::let_value(exec::schedule_after(scheduler, 10s), [] { return stdexec::just_stopped(); }),
    exec::schedule_after(scheduler, 30s) | stdexec::then([] { std::cout << "Hello!\n"; })
)

Are there any plans for stop_when or timeout_after as found in cpp-baremetal-senders-and-receivers? I am unfortunately slightly out of my depth to attempt a contribution here...

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Separately, is there any mechanism to obtain a timed_scheduler from within a coroutine?

I suspect not based on this facebookexperimental/libunifex#296