From: Eric Sunshine <sunshine@sunshineco.com>
To: Derrick Stolee <stolee@gmail.com>
Cc: "Derrick Stolee via GitGitGadget" <gitgitgadget@gmail.com>,
"Git List" <git@vger.kernel.org>,
"Nguyễn Thái Ngọc Duy" <pclouds@gmail.com>,
"Junio C Hamano" <gitster@pobox.com>,
"Elijah Newren" <newren@gmail.com>,
"Alban Gruin" <alban.gruin@gmail.com>,
"Derrick Stolee" <derrickstolee@github.com>,
"Derrick Stolee" <dstolee@microsoft.com>
Subject: Re: [PATCH v2 14/14] update-index: remove static globals from callbacks
Date: Thu, 7 Jan 2021 13:53:40 -0500 [thread overview]
Message-ID: <CAPig+cSLsLibDik3YYTPdwbHpywStMxR_4rRBZfYrX7S-cFnNA@mail.gmail.com> (raw)
In-Reply-To: <73f51832-583a-27e8-65fa-86eb0ebac4cf@gmail.com>
On Thu, Jan 7, 2021 at 6:19 AM Derrick Stolee <stolee@gmail.com> wrote:
> On 1/7/2021 12:09 AM, Eric Sunshine wrote:
> > Will there ever be a case in which `cd.istate` will be different from
> > `cd.repo->index`? If not, then we could get by with having only
> > `cd.repo`; callers requiring access to `istate` can fetch it from
> > `cd.repo`. If, on the other hand, `cd.istate` can be different from
> > `cd.repo->istate` -- or if that might become a possibility in the
> > future -- then having `cd.istate` makes sense. Not a big deal, though.
> > Just generally curious about it.
>
> I don't believe that 'istate' and 'repo->index' will ever be
> different in this file. This includes the members of the
> callback_data struct, but also the method parameters throughout.
>
> It could be possible to replace all references to 'istate' with
> 'repo->index' but the patches get slightly more messy. I also
> think the code looks messier, but you do make a good point that
> there is no concrete reason to separate the two.
I agree that it would make the code a bit noisier (to read) if
`istate` is eliminated from the callback structure, however, even
though I didn't originally feel strongly one way or the other about
having both `repo` and `istate` in the structure, I'm now leaning more
toward seeing `istate` eliminated. My one (big) concern with `istate`
is that it confuses readers into wondering whether `istate` and
`repo->istate` will ever be different. One way to avoid such confusion
would be to leave a comment in the code stating that the two values
will always be the same. The other way, of course, is to eliminate
`istate` from the structure altogether. I don't want to make more work
for you, but the more I think about it, the more I feel that removing
`istate` is the sensible thing to do. (And it doesn't require an extra
patch -- it can just be how this patch is crafted -- without ever
introducing `istate` to the structure in the first place.)
next prev parent reply other threads:[~2021-01-07 18:54 UTC|newest]
Thread overview: 65+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-01 13:06 [PATCH 00/12] Remove more index compatibility macros Derrick Stolee via GitGitGadget
2021-01-01 13:06 ` [PATCH 01/12] merge-index: drop " Derrick Stolee via GitGitGadget
2021-01-03 23:31 ` Alban Gruin
2021-01-04 11:08 ` Derrick Stolee
2021-01-01 13:06 ` [PATCH 02/12] mv: remove " Derrick Stolee via GitGitGadget
2021-01-01 13:06 ` [PATCH 03/12] rm: remove compatilibity macros Derrick Stolee via GitGitGadget
2021-01-01 13:07 ` [PATCH 04/12] update-index: drop the_index, the_repository Derrick Stolee via GitGitGadget
2021-01-01 21:05 ` Elijah Newren
2021-01-04 0:56 ` Derrick Stolee
2021-01-01 13:07 ` [PATCH 05/12] update-index: use istate->cache over active_cache Derrick Stolee via GitGitGadget
2021-01-01 13:07 ` [PATCH 06/12] update-index: use index->cache_nr over active_nr Derrick Stolee via GitGitGadget
2021-01-01 13:07 ` [PATCH 07/12] update-index: use istate->cache_changed Derrick Stolee via GitGitGadget
2021-01-01 13:07 ` [PATCH 08/12] update-index: use index_name_pos() over cache_name_pos() Derrick Stolee via GitGitGadget
2021-01-01 13:07 ` [PATCH 09/12] update-index: use remove_file_from_index() Derrick Stolee via GitGitGadget
2021-01-01 13:07 ` [PATCH 10/12] update-index: use add_index_entry() Derrick Stolee via GitGitGadget
2021-01-01 13:07 ` [PATCH 11/12] update-index: replace several compatibility macros Derrick Stolee via GitGitGadget
2021-01-01 13:07 ` [PATCH 12/12] update-index: remove ce_match_stat(), all macros Derrick Stolee via GitGitGadget
2021-01-01 21:12 ` Elijah Newren
2021-01-01 21:16 ` [PATCH 00/12] Remove more index compatibility macros Elijah Newren
2021-01-02 6:12 ` Eric Sunshine
2021-01-04 1:01 ` Derrick Stolee
2021-01-04 6:22 ` Eric Sunshine
2021-01-05 4:41 ` Derrick Stolee
2021-01-05 4:42 ` [PATCH v2 00/14] " Derrick Stolee via GitGitGadget
2021-01-05 4:42 ` [PATCH v2 01/14] mv: remove " Derrick Stolee via GitGitGadget
2021-01-05 4:42 ` [PATCH v2 02/14] rm: remove compatilibity macros Derrick Stolee via GitGitGadget
2021-01-05 4:42 ` [PATCH v2 03/14] update-index: drop the_index, the_repository Derrick Stolee via GitGitGadget
2021-01-05 4:42 ` [PATCH v2 04/14] update-index: use istate->cache over active_cache Derrick Stolee via GitGitGadget
2021-01-05 4:42 ` [PATCH v2 05/14] update-index: use index->cache_nr over active_nr Derrick Stolee via GitGitGadget
2021-01-05 4:42 ` [PATCH v2 06/14] update-index: use istate->cache_changed Derrick Stolee via GitGitGadget
2021-01-05 4:42 ` [PATCH v2 07/14] update-index: use index_name_pos() over cache_name_pos() Derrick Stolee via GitGitGadget
2021-01-05 4:42 ` [PATCH v2 08/14] update-index: use remove_file_from_index() Derrick Stolee via GitGitGadget
2021-01-05 4:42 ` [PATCH v2 09/14] update-index: use add_index_entry() Derrick Stolee via GitGitGadget
2021-01-05 4:42 ` [PATCH v2 10/14] update-index: replace several compatibility macros Derrick Stolee via GitGitGadget
2021-01-05 4:43 ` [PATCH v2 11/14] update-index: remove ce_match_stat(), all macros Derrick Stolee via GitGitGadget
2021-01-05 4:43 ` [PATCH v2 12/14] update-index: reduce static globals, part 1 Derrick Stolee via GitGitGadget
2021-01-05 4:43 ` [PATCH v2 13/14] update-index: reduce static globals, part 2 Derrick Stolee via GitGitGadget
2021-01-05 4:43 ` [PATCH v2 14/14] update-index: remove static globals from callbacks Derrick Stolee via GitGitGadget
2021-01-07 5:09 ` Eric Sunshine
2021-01-07 11:19 ` Derrick Stolee
2021-01-07 18:53 ` Eric Sunshine [this message]
2021-01-07 19:57 ` Junio C Hamano
2021-01-08 1:52 ` Derrick Stolee
2021-01-08 20:02 ` [PATCH v3 00/14] Remove more index compatibility macros Derrick Stolee via GitGitGadget
2021-01-08 20:02 ` [PATCH v3 01/14] mv: remove " Derrick Stolee via GitGitGadget
2021-01-08 20:02 ` [PATCH v3 02/14] rm: remove compatilibity macros Derrick Stolee via GitGitGadget
2021-01-08 20:02 ` [PATCH v3 03/14] update-index: drop the_index, the_repository Derrick Stolee via GitGitGadget
2021-01-08 20:02 ` [PATCH v3 04/14] update-index: use istate->cache over active_cache Derrick Stolee via GitGitGadget
2021-01-08 20:02 ` [PATCH v3 05/14] update-index: use istate->cache_nr over active_nr Derrick Stolee via GitGitGadget
2021-01-08 20:02 ` [PATCH v3 06/14] update-index: use istate->cache_changed Derrick Stolee via GitGitGadget
2021-01-08 20:02 ` [PATCH v3 07/14] update-index: use index_name_pos() over cache_name_pos() Derrick Stolee via GitGitGadget
2021-01-08 20:02 ` [PATCH v3 08/14] update-index: use remove_file_from_index() Derrick Stolee via GitGitGadget
2021-01-08 20:02 ` [PATCH v3 09/14] update-index: use add_index_entry() Derrick Stolee via GitGitGadget
2021-01-08 20:02 ` [PATCH v3 10/14] update-index: replace several compatibility macros Derrick Stolee via GitGitGadget
2021-01-08 20:02 ` [PATCH v3 11/14] update-index: remove ce_match_stat(), all macros Derrick Stolee via GitGitGadget
2021-01-08 20:02 ` [PATCH v3 12/14] update-index: reduce static globals, part 1 Derrick Stolee via GitGitGadget
2021-01-08 20:02 ` [PATCH v3 13/14] update-index: reduce static globals, part 2 Derrick Stolee via GitGitGadget
2021-01-08 20:02 ` [PATCH v3 14/14] update-index: remove static globals from callbacks Derrick Stolee via GitGitGadget
2021-01-10 7:03 ` [PATCH v3 00/14] Remove more index compatibility macros Junio C Hamano
2021-01-10 7:32 ` Eric Sunshine
2021-01-10 11:57 ` Derrick Stolee
2021-01-25 13:04 ` Derrick Stolee
2021-01-06 3:55 ` [PATCH 00/12] " Junio C Hamano
2021-01-06 11:35 ` Derrick Stolee
2021-01-06 20:52 ` Junio C Hamano
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