Message282722
Alternatively, change the representation of flag values from integers to some class extension that supports the common bitwise operators.
As a very rough sketch:
>>> class FlagInt(int):
... def __or__(self, other):
... return FlagInt(int(self) | int(other))
...
>>> f1 = FlagInt(1)
>>> f2 = FlagInt(2)
>>> f1 | f2
3
>>> isinstance(3, FlagInt)
False
>>> isinstance(f1 | f2, FlagInt)
True
That way, flag arguments can be determined at runtime to have derived from the proper flag values.
This kind of approach may have some backwards-incompatibility, unfortunately, since other folks have been hardcoding integers rather than use the flag constants. Other concerns might include serialization, in case someone tries to save a FlagInt somewhere and pull it out at some other time. |
|
Date |
User |
Action |
Args |
2016-12-08 17:32:51 | Danny Yoo | set | recipients:
+ Danny Yoo |
2016-12-08 17:32:51 | Danny Yoo | set | messageid: <1481218371.67.0.185317403078.issue28905@psf.upfronthosting.co.za> |
2016-12-08 17:32:51 | Danny Yoo | link | issue28905 messages |
2016-12-08 17:32:51 | Danny Yoo | create | |
|