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From: "Ævar Arnfjörð Bjarmason" <avarab@gmail.com>
To: "brian m. carlson" <sandals@crustytoothpaste.net>
Cc: git@vger.kernel.org, Derrick Stolee <dstolee@microsoft.com>
Subject: Re: [PATCH 09/15] hash: set and copy algo field in struct object_id
Date: Mon, 12 Apr 2021 00:12:38 +0200	[thread overview]
Message-ID: <87wnt8eai1.fsf@evledraar.gmail.com> (raw)
In-Reply-To: <YHNusqcmwv75P6Ck@camp.crustytoothpaste.net>


On Sun, Apr 11 2021, brian m. carlson wrote:

> On 2021-04-11 at 11:57:30, Ævar Arnfjörð Bjarmason wrote:
>> 
>> On Sat, Apr 10 2021, brian m. carlson wrote:
>> 
>> >  const struct object_id null_oid;
>> >  static const struct object_id empty_tree_oid = {
>> > -	EMPTY_TREE_SHA1_BIN_LITERAL
>> > +	EMPTY_TREE_SHA1_BIN_LITERAL,
>> > +	GIT_HASH_SHA1,
>> >  };
>> >  static const struct object_id empty_blob_oid = {
>> > -	EMPTY_BLOB_SHA1_BIN_LITERAL
>> > +	EMPTY_BLOB_SHA1_BIN_LITERAL,
>> > +	GIT_HASH_SHA1,
>> >  };
>> >  static const struct object_id empty_tree_oid_sha256 = {
>> > -	EMPTY_TREE_SHA256_BIN_LITERAL
>> > +	EMPTY_TREE_SHA256_BIN_LITERAL,
>> > +	GIT_HASH_SHA256,
>> >  };
>> >  static const struct object_id empty_blob_oid_sha256 = {
>> > -	EMPTY_BLOB_SHA256_BIN_LITERAL
>> > +	EMPTY_BLOB_SHA256_BIN_LITERAL,
>> > +	GIT_HASH_SHA256,
>> >  };
>> 
>> In this and some other patches we're continuing to add new fields to
>> structs without using designated initializers.
>> 
>> Not a new problem at all, just a note that if you re-roll I for one
>> would very much appreciate starting by migrating over to that. It makes
>> for much easier reading in subsequent patches in this series, and in
>> future ones.
>
> I'm happy to do that.  I thought we were not allowed to use C99 features
> because only recent versions of MSVC support modern C.  I was previously
> under the impression that MSVC didn't support anything but C89, but they
> now support C11 and C17 in their latest release[0], much to my surprise.
>
> If we're willing to require C99 features, then I'm happy to add those.
> I'll also send a follow-up series to require C99 support, which I think
> is overdue considering the standard is 22 years old.
>
> [0] https://devblogs.microsoft.com/cppblog/c11-and-c17-standard-support-arriving-in-msvc/

I don't think we can in general require C99, e.g. I found just the other
day that our CI's MSVC will fail on %zu (to print size_t without %lu & a
cast).

But we can use some subset of C99 features, and happily designated
initializers is one of those, see cbc0f81d96f (strbuf: use designated
initializers in STRBUF_INIT, 2017-07-10). It's been used all over the
place since then.

See e.g.: git grep -P '^\s+\.\S+ = ' -- '*.[ch]'

  reply	other threads:[~2021-04-11 22:12 UTC|newest]

Thread overview: 71+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-10 15:21 [PATCH 00/15] SHA-256 / SHA-1 interop, part 1 brian m. carlson
2021-04-10 15:21 ` [PATCH 01/15] sha1-file: allow hashing objects literally with any algorithm brian m. carlson
2021-04-15  8:55   ` Denton Liu
2021-04-15 23:03     ` brian m. carlson
2021-04-16 15:04   ` Ævar Arnfjörð Bjarmason
2021-04-16 18:55     ` Junio C Hamano
2021-04-10 15:21 ` [PATCH 02/15] builtin/hash-object: allow literally hashing with a given algorithm brian m. carlson
2021-04-11  8:52   ` Ævar Arnfjörð Bjarmason
2021-04-11 21:07     ` brian m. carlson
2021-04-16 15:21   ` Ævar Arnfjörð Bjarmason
2021-04-16 17:27   ` Ævar Arnfjörð Bjarmason
2021-04-10 15:21 ` [PATCH 03/15] cache: add an algo member to struct object_id brian m. carlson
2021-04-11 11:55   ` Ævar Arnfjörð Bjarmason
2021-04-11 21:37     ` brian m. carlson
2021-04-13 12:12   ` Derrick Stolee
2021-04-14  1:08     ` brian m. carlson
2021-04-15  8:47       ` Ævar Arnfjörð Bjarmason
2021-04-15 23:51         ` brian m. carlson
2021-04-10 15:21 ` [PATCH 04/15] Always use oidread to read into " brian m. carlson
2021-04-10 15:21 ` [PATCH 05/15] hash: add a function to finalize object IDs brian m. carlson
2021-04-10 15:21 ` [PATCH 06/15] Use the final_oid_fn to finalize hashing of " brian m. carlson
2021-04-10 15:21 ` [PATCH 07/15] builtin/pack-redundant: avoid casting buffers to struct object_id brian m. carlson
2021-04-10 15:21 ` [PATCH 08/15] cache: compare the entire buffer for " brian m. carlson
2021-04-11  8:17   ` Chris Torek
2021-04-11 11:36   ` Ævar Arnfjörð Bjarmason
2021-04-11 21:05     ` brian m. carlson
2021-04-10 15:21 ` [PATCH 09/15] hash: set and copy algo field in " brian m. carlson
2021-04-11 11:57   ` Ævar Arnfjörð Bjarmason
2021-04-11 21:48     ` brian m. carlson
2021-04-11 22:12       ` Ævar Arnfjörð Bjarmason [this message]
2021-04-11 23:52         ` brian m. carlson
2021-04-12 11:02           ` [PATCH 0/2] C99: harder dependency on variadic macros Ævar Arnfjörð Bjarmason
2021-04-12 11:02             ` [PATCH 1/2] git-compat-util.h: clarify comment on GCC-specific code Ævar Arnfjörð Bjarmason
2021-04-13  7:57               ` Jeff King
2021-04-13 21:07                 ` Junio C Hamano
2021-04-14  5:21                   ` Jeff King
2021-04-14  6:12                     ` Ævar Arnfjörð Bjarmason
2021-04-14  7:31                       ` Jeff King
2021-05-21  2:06               ` Jonathan Nieder
2021-04-12 11:02             ` [PATCH 2/2] C99 support: remove non-HAVE_VARIADIC_MACROS code Ævar Arnfjörð Bjarmason
2021-04-12 17:58               ` Junio C Hamano
2021-04-13  8:00                 ` Jeff King
2021-05-21  2:50               ` Jonathan Nieder
2021-04-12 12:14             ` [PATCH 0/2] C99: harder dependency on variadic macros Bagas Sanjaya
2021-04-12 12:41               ` Ævar Arnfjörð Bjarmason
2021-04-12 22:57                 ` brian m. carlson
2021-04-12 23:19                   ` Junio C Hamano
2022-01-28 11:11             ` [PATCH v2 0/2] C99: remove hardcoded-out !HAVE_VARIADIC_MACROS code Ævar Arnfjörð Bjarmason
2022-01-28 11:11               ` [PATCH v2 1/2] git-compat-util.h: clarify GCC v.s. C99-specific in comment Ævar Arnfjörð Bjarmason
2022-01-28 11:11               ` [PATCH v2 2/2] C99: remove hardcoded-out !HAVE_VARIADIC_MACROS code Ævar Arnfjörð Bjarmason
2022-01-28 22:40                 ` Junio C Hamano
2022-02-19 10:41               ` [PATCH v3 0/3] C99: remove dead " Ævar Arnfjörð Bjarmason
2022-02-19 10:41                 ` [PATCH v3 1/3] git-compat-util.h: clarify GCC v.s. C99-specific in comment Ævar Arnfjörð Bjarmason
2022-02-19 10:41                 ` [PATCH v3 2/3] C99: remove hardcoded-out !HAVE_VARIADIC_MACROS code Ævar Arnfjörð Bjarmason
2022-02-19 10:41                 ` [PATCH v3 3/3] trace.h: remove never-used TRACE_CONTEXT Ævar Arnfjörð Bjarmason
2022-02-20 12:02                   ` Junio C Hamano
2022-02-20 12:38                     ` Ævar Arnfjörð Bjarmason
2022-02-20 20:12                       ` Junio C Hamano
2022-02-21 16:05                 ` [PATCH v4 0/2] C99: remove dead !HAVE_VARIADIC_MACROS code Ævar Arnfjörð Bjarmason
2022-02-21 16:05                   ` [PATCH v4 1/2] git-compat-util.h: clarify GCC v.s. C99-specific in comment Ævar Arnfjörð Bjarmason
2022-02-21 16:05                   ` [PATCH v4 2/2] C99: remove hardcoded-out !HAVE_VARIADIC_MACROS code Ævar Arnfjörð Bjarmason
2021-04-12 10:53         ` [PATCH 09/15] hash: set and copy algo field in struct object_id Junio C Hamano
2021-04-12 11:13           ` Ævar Arnfjörð Bjarmason
2021-04-10 15:21 ` [PATCH 10/15] hash: provide per-algorithm null OIDs brian m. carlson
2021-04-11 14:03   ` Junio C Hamano
2021-04-11 21:51     ` brian m. carlson
2021-04-10 15:21 ` [PATCH 11/15] builtin/show-index: set the algorithm for object IDs brian m. carlson
2021-04-10 15:21 ` [PATCH 12/15] commit-graph: don't store file hashes as struct object_id brian m. carlson
2021-04-10 15:21 ` [PATCH 13/15] builtin/pack-objects: avoid using struct object_id for pack hash brian m. carlson
2021-04-10 15:21 ` [PATCH 14/15] hex: default to the_hash_algo on zero algorithm value brian m. carlson
2021-04-10 15:21 ` [PATCH 15/15] hex: print objects using the hash algorithm member brian m. carlson

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