From: Jeff King <peff@peff•net>
To: shejialuo <shejialuo@gmail•com>
Cc: git@vger•kernel.org, Junio C Hamano <gitster@pobox•com>,
Patrick Steinhardt <ps@pks•im>
Subject: Re: [PATCH v2 3/8] string-list: return index directly when inserting an existing element
Date: Mon, 19 May 2025 03:58:13 -0400 [thread overview]
Message-ID: <20250519075813.GF102701@coredump.intra.peff.net> (raw)
In-Reply-To: <aCoDW8CcWeq8T9hp@ArchLinux>
On Sun, May 18, 2025 at 11:57:15PM +0800, shejialuo wrote:
> When inserting an existing element, "add_entry" would convert "index"
> value to "-1-index" to indicate the caller that this element is in the
> list already.
>
> However, in "string_list_insert", we would simply convert this to the
> original positive index without any further action. Let's directly
> return the index as we don't care about whether the element is in the
> list by using "add_entry".
>
> In the future, if we want to let "add_entry" tell the caller, we may add
> "int *exact_match" parameter to "add_entry" instead of converting the
> index to negative to indicate.
I assumed this was in the same boat as the previous change: something we
used to use and now don't. But I don't think we ever did. The "-1-index"
pattern goes all the way back to the beginning of the code.
It does match how other functions like string_list_find_insert_index()
behave. But I think that pattern doesn't make much sense for
add_entry(). After the function returns we know we've either found
something or added it, so the positive index will always point to a
matching entry.
So I think your patches are correct, but I was curious how we got to
this state.
-Peff
next prev parent reply other threads:[~2025-05-19 7:58 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-04-22 14:53 [PATCH 0/5] enhance "string_list" code and test shejialuo
2025-04-22 14:54 ` [PATCH 1/5] string-list: fix sign compare warnings shejialuo
2025-04-22 21:02 ` Junio C Hamano
2025-04-24 12:27 ` shejialuo
2025-04-22 14:54 ` [PATCH 2/5] u-string-list: move "test_split" into "u-string-list.c" shejialuo
2025-04-22 21:27 ` Junio C Hamano
2025-04-24 12:50 ` shejialuo
2025-04-23 11:52 ` Patrick Steinhardt
2025-04-24 12:53 ` shejialuo
2025-04-22 14:55 ` [PATCH 3/5] u-string-list: move "test_split_in_place" to "u-string-list.c" shejialuo
2025-04-23 11:53 ` Patrick Steinhardt
2025-04-22 14:55 ` [PATCH 4/5] u-string-list: move "filter string" test " shejialuo
2025-04-22 14:55 ` [PATCH 5/5] u-string-list: move "remove duplicates" " shejialuo
2025-04-23 11:53 ` Patrick Steinhardt
2025-04-24 12:56 ` shejialuo
2025-05-18 15:55 ` [PATCH v2 0/8] enhance "string_list" code and test shejialuo
2025-05-18 15:56 ` [PATCH v2 1/8] string-list: fix sign compare warnings for loop iterator shejialuo
2025-05-19 7:17 ` Patrick Steinhardt
2025-05-26 13:50 ` shejialuo
2025-05-18 15:57 ` [PATCH v2 2/8] string-list: remove unused "insert_at" parameter from add_entry shejialuo
2025-05-19 7:17 ` Patrick Steinhardt
2025-05-26 13:52 ` shejialuo
2025-05-19 7:51 ` Jeff King
2025-05-26 14:01 ` shejialuo
2025-05-26 14:21 ` Patrick Steinhardt
2025-05-18 15:57 ` [PATCH v2 3/8] string-list: return index directly when inserting an existing element shejialuo
2025-05-19 7:18 ` Patrick Steinhardt
2025-05-26 14:13 ` shejialuo
2025-05-19 7:58 ` Jeff King [this message]
2025-05-26 14:20 ` shejialuo
2025-05-18 15:57 ` [PATCH v2 4/8] string-list: enable sign compare warnings check shejialuo
2025-05-19 7:18 ` Patrick Steinhardt
2025-05-26 14:27 ` shejialuo
2025-05-18 15:57 ` [PATCH v2 5/8] u-string-list: move "test_split" into "u-string-list.c" shejialuo
2025-05-19 7:17 ` Patrick Steinhardt
2025-05-18 15:57 ` [PATCH v2 6/8] u-string-list: move "test_split_in_place" to "u-string-list.c" shejialuo
2025-05-18 15:58 ` [PATCH v2 7/8] u-string-list: move "filter string" test " shejialuo
2025-05-19 7:18 ` Patrick Steinhardt
2025-05-26 14:33 ` shejialuo
2025-05-18 15:58 ` [PATCH v2 8/8] u-string-list: move "remove duplicates" " shejialuo
2025-05-19 7:18 ` Patrick Steinhardt
2025-06-29 4:26 ` [PATCH v3 0/8] enhance "string_list" code and test shejialuo
2025-06-29 4:27 ` [PATCH v3 1/8] string-list: fix sign compare warnings for loop iterator shejialuo
2025-06-29 4:27 ` [PATCH v3 2/8] string-list: remove unused "insert_at" parameter from add_entry shejialuo
2025-06-29 4:27 ` [PATCH v3 3/8] string-list: return index directly when inserting an existing element shejialuo
2025-06-29 4:28 ` [PATCH v3 4/8] string-list: enable sign compare warnings check shejialuo
2025-06-29 4:28 ` [PATCH v3 5/8] u-string-list: move "test_split" into "u-string-list.c" shejialuo
2025-06-29 4:28 ` [PATCH v3 6/8] u-string-list: move "test_split_in_place" to "u-string-list.c" shejialuo
2025-06-29 4:28 ` [PATCH v3 7/8] u-string-list: move "filter string" test " shejialuo
2025-06-29 4:28 ` [PATCH v3 8/8] u-string-list: move "remove duplicates" " shejialuo
2025-07-04 5:24 ` [PATCH v3 0/8] enhance "string_list" code and test Patrick Steinhardt
2025-07-07 15:10 ` Junio C Hamano
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20250519075813.GF102701@coredump.intra.peff.net \
--to=peff@peff$(echo .)net \
--cc=git@vger$(echo .)kernel.org \
--cc=gitster@pobox$(echo .)com \
--cc=ps@pks$(echo .)im \
--cc=shejialuo@gmail$(echo .)com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox