[Python-Dev] Re: name for new Enum decorator

2021年6月06日 03:05:14 -0700

On Fri, May 28, 2021 at 10:26 PM Ethan Furman <[email protected]> wrote:
> On 5/28/21 12:43 AM, Petr Viktorin wrote:
> > On 28. 05. 21 5:24, Ethan Furman wrote:
>
> >> class FlagWithMasks(IntFlag):
> >> DEFAULT = 0x0
> >>
> >> FIRST_MASK = 0xF
> >> FIRST_ROUND = 0x0
> >> FIRST_CEIL = 0x1
> >> FIRST_TRUNC = 0x2
> >>
> >> SECOND_MASK = 0xF0
> >> SECOND_RECALC = 0x00
> >> SECOND_NO_RECALC = 0x10
> >>
> >> THIRD_MASK = 0xF00
> >> THIRD_DISCARD = 0x000
> >> THIRD_KEEP = 0x100
> >>
> >> Here we have three flags (FIRST_MASK, SECOND_MASK, THIRD_MASK) that
> are aliasing values
> >> that don't exist, but it seems intentional and not an error.
> >
> > Are you looking for a decorator for the whole Enum, or a way to mark
> individual *values* as masks?
>
> The decorator is for whole enum. The issue is not that some values are
> masks, but whether the absence of named bits
> covered by the mask is an error.
>
> If all masked bits must be defined by individual values then it's a
completely_masked enum? This is quite a bikeshed we're painting here! ;-)
Kind regards,
Steve
> Message archived at
> https://mail.python.org/archives/list/[email protected]/message/OM5M774MP5QPLFXZ7OVGBPR7ZFB6X35A/
>
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