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From: Eric Sunshine <sunshine@sunshineco.com>
To: ZheNing Hu <adlternative@gmail.com>
Cc: ZheNing Hu via GitGitGadget <gitgitgadget@gmail.com>,
	Git List <git@vger.kernel.org>,
	Junio C Hamano <gitster@pobox.com>,
	Denton Liu <liu.denton@gmail.com>
Subject: Re: [PATCH v4] format-patch: allow a non-integral version numbers
Date: Tue, 16 Mar 2021 02:15:04 -0400	[thread overview]
Message-ID: <CAPig+cRkGvKU8b2vauUZ4=EtTj4DU2e9k0HciTVEz-6-P6X5KQ@mail.gmail.com> (raw)
In-Reply-To: <CAOLTT8T14P1VfbbXnXpAV-6GfZ8jXUqqCVaY1Uxs3UtfnFvKvw@mail.gmail.com>

On Tue, Mar 16, 2021 at 1:48 AM ZheNing Hu <adlternative@gmail.com> wrote:
> Eric Sunshine <sunshine@sunshineco.com> 于2021年3月16日周二 上午7:41写道:
> > > +               strtol_i(reroll_count_string, 10, &reroll_count);
> >
> > This code can be confusing to readers since it appears to ignore the
> > result of strtol_i() [...]
> > [...] I think it would be clearer if you move the strtol_i()
> > call into the diff_title() function since -- following your changes --
> > that function is the only code which cares whether `reroll_count` can
> > be parsed as a number (the rest of the code, after your change, just
> > uses it as a string).
>
> Well, The reason `strtol_i` does not check the return value is that
> `strtol_i` will
> only modify the value of `reroll_count` if the `reroll_count_string`
> we provide is
>  an integer string, so if `reroll_count_string` is not an integer string, then
> `reroll_count` will remain -1, and then `diff_title` will only execute
>
>         if (reroll_count <= 0)
>                 strbuf_addstr(sb, generic);
>
> So don't need check strtol_i return value.

Yes, I understand the reason, but it is not easy for someone new to
this code to figure it out without looking at diff_title() and its
callers. The place where the return value of strtol_i() is ignored is
very far removed from the place where the value of `reroll_count` is
consumed in diff_title(), so it's not obvious to the reader how this
is all supposed to work. If you move strtol_i() into diff_title(),
then the parsing and the consuming of that value happen in the same
place, making it easier to understand.

> But what you said to put
> `strtol_i` in
> `diff_title` is indeed a good idea. Of course, we need to modify the declaration
>  and parameters of `diff_title`.

Yes, it is a very minor modification to diff_title(), changing
`reroll_count` from int to string.

Moving the parsing into diff_title() also allows you to use the
simpler name `reroll_count` for the string variable in cmd_fmt_patch()
rather than the longer `reroll_count_string`; just change
`reroll_count` from int to string.

  reply	other threads:[~2021-03-16  6:16 UTC|newest]

Thread overview: 49+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-25 16:15 [PATCH] format-patch: allow a non-integral version numbers ZheNing Hu via GitGitGadget
2021-02-25 17:56 ` Eric Sunshine
2021-02-27  7:00   ` ZheNing Hu
2021-02-25 18:13 ` Junio C Hamano
2021-02-27  7:30   ` ZheNing Hu
2021-03-17 11:46   ` Đoàn Trần Công Danh
2021-03-17 19:17     ` Junio C Hamano
2021-03-01  8:40 ` [PATCH v2] " ZheNing Hu via GitGitGadget
2021-03-03  3:44   ` Junio C Hamano
2021-03-03  9:02   ` Denton Liu
2021-03-04  0:54     ` Junio C Hamano
2021-03-04  2:08       ` ZheNing Hu
2021-03-04  3:27         ` Eric Sunshine
2021-03-04  8:41           ` Denton Liu
2021-03-04 12:12   ` [PATCH v3] " ZheNing Hu via GitGitGadget
2021-03-04 12:49     ` Denton Liu
2021-03-05  4:56       ` ZheNing Hu
2021-03-05  7:10     ` [PATCH v4] " ZheNing Hu via GitGitGadget
2021-03-15 23:41       ` Eric Sunshine
2021-03-16  5:48         ` ZheNing Hu
2021-03-16  6:15           ` Eric Sunshine [this message]
2021-03-17 17:27             ` Junio C Hamano
2021-03-16  8:25       ` [PATCH v5] " ZheNing Hu via GitGitGadget
2021-03-16 23:36         ` Eric Sunshine
2021-03-17  2:05           ` ZheNing Hu
2021-03-18  6:00         ` [PATCH v6] " ZheNing Hu via GitGitGadget
2021-03-19  6:00           ` Eric Sunshine
2021-03-19  7:25             ` ZheNing Hu
2021-03-19 11:21           ` [PATCH v7] " ZheNing Hu via GitGitGadget
2021-03-19 16:01             ` Junio C Hamano
2021-03-20  3:08               ` ZheNing Hu
2021-03-19 17:28             ` Junio C Hamano
2021-03-20  3:04               ` ZheNing Hu
2021-03-20 14:56             ` [PATCH v8] " ZheNing Hu via GitGitGadget
2021-03-20 19:55               ` Junio C Hamano
2021-03-21  2:45                 ` ZheNing Hu
2021-03-21  4:05               ` Eric Sunshine
2021-03-21  5:45                 ` Junio C Hamano
2021-03-21  5:54                   ` Eric Sunshine
2021-03-24  8:46                     ` Denton Liu
2021-03-21  7:22                 ` ZheNing Hu
2021-03-21  9:00               ` [PATCH v9] " ZheNing Hu via GitGitGadget
2021-03-23  5:31                 ` Eric Sunshine
2021-03-23  6:42                   ` Junio C Hamano
2021-03-23  8:53                   ` ZheNing Hu
2021-03-23  9:16                     ` ZheNing Hu
2021-03-23 11:12                 ` [PATCH v10] " ZheNing Hu via GitGitGadget
2021-03-24  3:58                   ` Eric Sunshine
2021-03-24  4:43                     ` ZheNing Hu

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