SE-0296: async/await

[anandabits (Matthew Johnson)]

@Douglas_Gregor

That's not the design of cancellation described in the Structured Concurrency proposal. A potential suspension point is not a return point. One manually checks for cancellation and can then choose to exit early via either of the normal mechanisms, whether it's return or throw . Cancellation is not a third kind of exit.

I know it’s off topic for this thread, but I have asked for a more clear justification of this approach to cancellation and none has been provided thus far. Given that Structured Concurrency is a pitch and not an accepted proposal, I don’t think reviewers of async / await should be expected to accept its design as a given. There is more discussion to be had around cancellation before a final design is accepted.