On 04/29, Yury Selivanov wrote: > Because you want operators to be resolved in the > order you see them, generally. > > You want '(await -fut)' to: > > 1. Suspend on fut; > 2. Get the result; > 3. Negate it. > > This is a non-obvious thing. I would myself interpret it > as: > > 1. Get fut.__neg__(); > 2. await on it.
Both you and Paul are correct on this, thank you. The proper resolution of await -coro() is indeed to get the result of coro(), call it's __neg__ method, and then await on that. And that is perfectly reasonable, and should not be a SyntaxError; what it might be is an AttributeError (no __neg__ method) or an AsyncError (__neg__ returned non-awaitable object), or might even just work [1]... but it definitely should /not/ be a SyntaxError. -- ~Ethan~ [1] http://stackoverflow.com/q/7719018/208880 _______________________________________________ Python-Dev mailing list [email protected] https://mail.python.org/mailman/listinfo/python-dev Unsubscribe: https://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com