From: Julia Lawall <julia.lawall@inria.fr>
To: Markus Elfring <Markus.Elfring@web.de>
Cc: cocci@inria.fr
Subject: Re: [cocci] Reconsidering application of selected SmPL isomorphisms
Date: Mon, 25 Nov 2024 10:37:43 -0500 (EST) [thread overview]
Message-ID: <efec9984-4eee-4c75-76ce-e6bd27442daa@inria.fr> (raw)
In-Reply-To: <434d257c-f0a5-483d-9fcb-3303301ad867@web.de>
[-- Attachment #1: Type: text/plain, Size: 1176 bytes --]
On Mon, 25 Nov 2024, Markus Elfring wrote:
> Hello,
>
> I would like to clarify software development consequences also for
> a simple script variant for the semantic patch language (like the following).
>
>
> @show_questionable_checks@
> expression e1, e2;
> statement s1, s2;
> @@
> if
> (
> *!(e1 || e2)
> )
> s1
> else
> s2
>
>
> Questionable test result:
> Markus_Elfring@Sonne:/home/altes_Heim2/elfring/Projekte/Coccinelle/janitor> spatch --parse-cocci show_questionable_OR_checks2.cocci
> …
> (
>
> (
>
> (
> if (*!*(*e1 *|| *e2*))
> |
> if (*!*e1 *|| *e2)
> )s1 else s2
> |
> …
>
>
> I would interpret such data display in the way that the isomorphism “paren”
> was applied here.
> https://gitlab.inria.fr/coccinelle/coccinelle/-/blob/04f71e76b0857ca12ec7207b26368df78d2b57d4/standard.iso#L389
>
> I find the shown SmPL code transformation inappropriate at this place.
> Would we like to apply De Morgan's laws instead?
> https://en.wikipedia.org/wiki/De_Morgan%27s_laws
>
> Would we like to reconsider the application of the isomorphism for the switching
> of if/else branches accordingly?
Indeed, it looks wrong.
Thanks for the report.
julia
next prev parent reply other threads:[~2024-11-25 15:37 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-11-25 13:16 [cocci] Reconsidering application of selected SmPL isomorphisms Markus Elfring
2024-11-25 15:37 ` Julia Lawall [this message]
2024-11-25 15:42 ` Julia Lawall
2024-11-25 16:13 ` Markus Elfring
2024-11-25 16:23 ` Julia Lawall
2024-11-25 16:34 ` Markus Elfring
2024-11-25 16:46 ` Julia Lawall
2024-11-25 16:57 ` [cocci] Advanced handling of logical operator chains (with SmPL)? Markus Elfring
2024-11-25 17:03 ` Julia Lawall
2024-11-25 17:08 ` Markus Elfring
2024-11-25 17:04 ` [cocci] Data processing challenges for pointer expressions Markus Elfring
2024-11-25 17:16 ` Julia Lawall
2024-11-25 17:58 ` Markus Elfring
2024-11-26 9:21 ` [cocci] Data processing challenges for source code analyses Markus Elfring
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=efec9984-4eee-4c75-76ce-e6bd27442daa@inria.fr \
--to=julia.lawall@inria.fr \
--cc=Markus.Elfring@web.de \
--cc=cocci@inria.fr \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
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;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).