On Sun, Oct 1, 2017 at 6:19 AM, Antoine Pitrou
Well, this is not really a bitfield, but a bitfield plus some irregular hardcoded values. Therefore I don't think it brings much in the way of discoverability / understandability.
That said, perhaps it makes implementation easier on the C side...
I think I'm coming to the same conclusion: using bitwise operations for the optimization levels seems to just boil down to a more cryptic version of the simple "level 3" solution, with public-facing impacts to the pycache and existing interfaces etc that I don't think are worth it in this case. My only other thought at the moment, would be to use the existing -X option to achieve something similar to what I did with the new -N option, but then just quickly map that back to an integer under the hood. That is, "-X opt-nodebug -X opt-noassert" would just become "level 3" internally so that the various interfaces wouldn't have to change. But there are lots of downsides to that solution too: - having to hardcode the various possible combinations of string options to an integer value - inelegant lookups like: if flag is greater than 2 but not 10 or 15, etc - un-zen: yet even more ways to set that integer flag (PYTHONOPTIMIZE, -OOO, "-X opt-nodebug -X opt-noassert") - mixed-bag -X options are less discoverable than just adding a new command line option (like -N or -OOO) - other downsides, I'm sure Hmmm.... stalled again, I think. --diana