[Python-Dev] Can we use "designated initializer" widely in core modules?

[INADA Naoki]

On Wed, Jan 18, 2017 at 9:00 AM, Erik <python at lucidity.plus.com> wrote:
> On 17/01/17 06:32, INADA Naoki wrote:
>>
>> With designated initializer, it becomes:
>>
>>      0,                                  /* tp_free */
>> +    .tp_fastcall = (fastternaryfunc)attrgetter_call,
>>  };
>>
>> It's readable, and easy to review.
>
>
> FWIW, I dislike mixing the two forms (because it still prevents the
> structure layout changing - or introduces bugs if it does - though I guess
> in Python's case that's not likely to happen).
>
> PEP 7 doesn't mention anything about this and I doubt a wholesale conversion
> effort to the C99 syntax would be desirable, but perhaps a recommendation
> that if a new initializer is being added then the whole expression should be
> changed to the C99 syntax is reasonable.
>
> Regards, E.
>

I think mixing two forms is OK only if new form is used only at bottom.
(like keyword arguments are allowed after all positional arguments in
Python function calling)

Complete rewriting makes diff huge.  And there is PyVarObject_HEAD_INIT already.