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Re: [PATCH 1/5] *.h: move some *_INIT to designated initializers

From
Junio C Hamano <gitster@pobox.com>
Date
Jul 1, 2021, 15:56 UTC
Message-ID
<xmqq8s2qrps1.fsf@gitster.g>
In-Reply-To
<CAN0heSpsg=bwX9gbYfeWYqUbuen-zArR69FWxNmdtcQW_RubzA@mail.gmail.com>
Martin Ågren <martin.agren@gmail.com> writes:
Show 16 quoted lines
>> -#define STRING_LIST_INIT_NODUP { NULL, 0, 0, 0, NULL }
>> +#define STRING_LIST_INIT_NODUP { 0 }
>
> This "NODUP" one is a bit of an odd case though. You don't actually
> change it to use designated initializers, as the patch says. Instead you
> change it in a slightly different way. In a sense, you assign the
> literal zero not to strdup_strings, but to the first field, which is a
> pointer, where I would have expected NULL.
>
> I think there's been some recent-ish "we can assign `{ 0 }` even if the
> first field is a pointer, because it's idiomatic and works out fine"
> even if assigning 0 to a pointer looks a bit odd. So it might not be
> wrong as such, but it doesn't match what the commit message claims, and
> I think it would be more clear to use `{ .strdup_strings = 0 }` here:
> We're explicitly interested in *not* duplicating the strings. It's not
> just some default "let's leave everything as zero/NULL".

Well reasoned. I agree that it is not wrong per-se, and the solution to use designated initializer is indeed in line with the theme of the topic.

Previous: Martin ÅgrenNext: Ævar Arnfjörð Bjarmason
Message 6 of 10 in “*.[ch]: don't duplicate *_init() and *_INIT logic”
  1. 0/5 *.[ch]: don't duplicate *_init() and *_INIT logicÆvar Arnfjörð Bjarmason, Jul 1, 2021
  2. 3/5 dir.[ch]: replace dir_init() with DIR_INITÆvar Arnfjörð Bjarmason, Jul 1, 2021
  3. 2/5 *.c *_init(): define in terms of corresponding *_INIT macroÆvar Arnfjörð Bjarmason, Jul 1, 2021
  4. 1/5 *.h: move some *_INIT to designated initializersÆvar Arnfjörð Bjarmason, Jul 1, 2021
  5. Martin ÅgrenJul 1, 2021
  6. Junio C HamanoJul 1, 2021
  7. Ævar Arnfjörð BjarmasonJul 1, 2021
  8. 5/5 string-list.h users: change to use *_{nodup,dup}()Ævar Arnfjörð Bjarmason, Jul 1, 2021
  9. 4/5 string-list.[ch]: add a string_list_init_{nodup,dup}()Ævar Arnfjörð Bjarmason, Jul 1, 2021
  10. Jeff KingJul 1, 2021

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