Bug 3999 and 4261

[Don]

so wrote:
>> Does this mean no more defining bits as enums?
> 
> Now that would be brutal, it is one of the best use cases of enum if not 
> the best...

Yes.
I reckon, if an enum doesn't explicitly define the value of each member, 
it shouldn't implicitly convert to int -- and it should not be possible 
to treat it as bits.

OTOH if each member has an explicitly defined value, it's reasonable to 
perform logical operations on it.