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From: Junio C Hamano <gitster@pobox.com>
To: Shengfa Lin <shengfa@google.com>
Cc: jrnieder@gmail.com, git@vger.kernel.org, nathaniel@google.com,
	rsbecker@nexbridge.com, santiago@nyu.edu
Subject: Re: [RFC PATCH 1/1] hideTimezone: add a user.hideTimezone config
Date: Fri, 02 Oct 2020 21:57:42 -0700	[thread overview]
Message-ID: <xmqqzh537vp5.fsf@gitster.c.googlers.com> (raw)
In-Reply-To: <20201002223212.93266-1-shengfa@google.com> (Shengfa Lin's message of "Fri, 2 Oct 2020 22:32:12 +0000")

Shengfa Lin <shengfa@google.com> writes:

>>>>> +  git_config(git_default_config, NULL);
>>>>
>>>> Declaration after statement is not tolerated in this codebase.
>>>
>>> If I use the DEVELOPER=1 flag in config.mak and call make again, would the compiler
>>> catches this as an error?
>>
>> Yes, DEVELOPER_CFLAGS includes -Wdeclaration-after-statement.
>
> Got the error from int hide_timezone = 0; but not
> git_config(git_default_config, NULL);.
> ...
>>>>> +  int hide_timezone = 0;

That is exactly expected.

The problematic sequence was

	...
	s.colopts = 0;

	git_config(git_default_config, NULL);
	int hide_timezone = 0;

The assignment of 0 to s.colopts, which existed before your patch,
was already a statement.  So is a new call to git_config() function
you added.  As the existing "s.colopts = 0" were in a place where a
statement can legally appear, the place you added git_config() call
is also where a statement can legally appear.  There is nothing for
the compiler to complain about.

The declaration of hide_timezone added _after_ that statement is a
different story.  Because the -Wdeclaration-after-statement is about
starting a function (or "a block" in general) with all the necessary
declarations before we write a single statement, and also forbidding
us from adding other declarations after we write a statement.  Since
there are bunch of statements in the same block already, including
the assignment to s.colopts and a call to git_config(), we cannot
add a declaration after that.

Thanks.


  reply	other threads:[~2020-10-03  4:57 UTC|newest]

Thread overview: 47+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-12-05 17:14 [ISSUE] Stop accessing, storing, and sharing the user's time zone Nathaniel Manista
2019-12-05 17:31 ` Junio C Hamano
2019-12-05 17:33 ` Randall S. Becker
2019-12-05 17:43   ` Junio C Hamano
2019-12-05 17:53     ` Santiago Torres Arias
2019-12-05 18:00     ` Randall S. Becker
2020-09-30 23:21 ` [RFC PATCH 0/1] adding user.hideTimezone for setting UTC timezone Shengfa Lin
2020-09-30 23:21   ` [RFC PATCH 1/1] hideTimezone: add a user.hideTimezone config Shengfa Lin
2020-09-30 23:41     ` Junio C Hamano
2020-10-01  0:17       ` Junio C Hamano
2020-10-02  6:07         ` Shengfa Lin
2020-10-01  0:31       ` Junio C Hamano
2020-10-01  0:35         ` Junio C Hamano
2020-10-02  6:41           ` Shengfa Lin
2020-10-02  6:46             ` Shengfa Lin
2020-10-02  6:37         ` Shengfa Lin
2020-10-02  6:02       ` Shengfa Lin
2020-10-02  6:15         ` Jonathan Nieder
2020-10-02 22:32           ` Shengfa Lin
2020-10-03  4:57             ` Junio C Hamano [this message]
2020-09-30 23:55     ` Junio C Hamano
2020-10-02  6:51       ` Shengfa Lin
2020-10-01  0:05     ` Junio C Hamano
2020-10-01  2:44     ` Jonathan Nieder
2020-10-02 21:17       ` Shengfa Lin
2020-09-30 23:53   ` [RFC PATCH 0/1] adding user.hideTimezone for setting UTC timezone Junio C Hamano
2020-10-01  2:17     ` Junio C Hamano
2020-10-01  3:43       ` Jonathan Nieder
2020-10-01 15:48         ` Junio C Hamano
2020-10-08 19:49           ` Junio C Hamano
     [not found]             ` <CAEOYnASgxCE5NjhoSgDwyQyAmdLhw5UyFq_Fu==8q7y6uXGz6w@mail.gmail.com>
2020-10-09 16:48               ` Junio C Hamano
2020-10-02 21:56         ` Shengfa Lin
2020-10-02 22:06           ` Junio C Hamano
2020-10-03  3:50             ` Shengfa Lin
2020-10-03  4:42               ` Junio C Hamano
2020-10-03 19:53         ` brian m. carlson
2020-10-03 22:14           ` Junio C Hamano
2020-10-02 21:42       ` Shengfa Lin
2020-10-02 21:23     ` Shengfa Lin
2020-10-13  5:28 ` [WIP v2 0/2] experiment with commit option record-time-zone Shengfa Lin
2020-10-13  5:28   ` [WIP v2 1/2] Adding a record-time-zone command option for commit Shengfa Lin
2020-10-13 20:03     ` Junio C Hamano
2020-10-21  5:01       ` Shengfa Lin
2020-10-21 18:55         ` Junio C Hamano
2020-10-22 16:27           ` Junio C Hamano
2020-10-26  4:14             ` Shengfa Lin
2020-10-13  5:28   ` [WIP v2 2/2] Demonstrate failing and passing tests Shengfa Lin

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