From: Julia Lawall <julia.lawall@inria.fr>
To: Markus Elfring <Markus.Elfring@web.de>
Cc: Wellington Wallace <wellingtonwallace@gmail.com>,
Coccinelle <cocci@systeme.lip6.fr>
Subject: Re: [Cocci] Replacing a std::string check by strcmp() with SmPL
Date: Mon, 3 Feb 2020 21:52:45 +0100 (CET) [thread overview]
Message-ID: <alpine.DEB.2.21.2002032151520.3356@hadrien> (raw)
In-Reply-To: <72729ef6-f8df-942f-57aa-4b3fac75a20d@web.de>
[-- Attachment #1: Type: text/plain, Size: 1631 bytes --]
On Mon, 3 Feb 2020, Markus Elfring wrote:
> Hello,
>
> I have tried the following small script variant out for
> the semantic patch language.
>
> @replacement@
> constant c;
> identifier text;
> expression x;
> statement is, es;
> @@
> char* text = x(...);
>
> if (
> + strcmp(
> text
> + ,
> - == std::string(
> c
> )
> )
> is
> else
> es
>
>
> A corresponding transformation result from the software
> “Coccinelle 1.0.8-00029-ga549b9f0” looks promising (in principle).
>
> elfring@Sonne:~/Projekte/Coccinelle/Probe> spatch --c++ replace_std_string_check_by_strcmp2.cocci PulseEffects-source_output_effects-excerpt2.cpp
> …
> @@ -1,7 +1,7 @@
> void on_message_element(const GstBus* gst_bus, GstMessage* message, SourceOutputEffects* soe) {
> char* src_name = GST_OBJECT_NAME(message->src);
>
> - if (src_name == std::string("equalizer_input_level")) {
> + if (strcmp(src_name, "equalizer_input_level")) {
> soe->equalizer_input_level.emit(soe->get_peak(message));
> // Deleted part
> } else if (src_name == std::string("webrtc_output_level")) {
>
>
> 1. But I wonder about an additional space character at the beginning
> of the shown function in the generated patch.
Where is the space that yoyu are concerned about?
>
> 2. Will it become possible to achieve a similar change
> if the specification “auto” would be used instead of
> the data type “char*”?
> https://github.com/wwmm/pulseeffects/blob/acb5161a6ab8d3b0c395ed2809d3318ccf4931bc/src/source_output_effects.cpp#L6
I guess it would be fine if you put
typedef auto;
among the metavariables?
julia
[-- Attachment #2: Type: text/plain, Size: 136 bytes --]
_______________________________________________
Cocci mailing list
Cocci@systeme.lip6.fr
https://systeme.lip6.fr/mailman/listinfo/cocci
next prev parent reply other threads:[~2020-02-03 20:53 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-03 20:45 [Cocci] Replacing a std::string check by strcmp() with SmPL Markus Elfring
2020-02-03 20:52 ` Julia Lawall [this message]
2020-02-03 21:13 ` Markus Elfring
2020-02-03 21:28 ` Julia Lawall
2020-02-04 8:11 ` Markus Elfring
2020-02-04 8:14 ` Julia Lawall
2020-02-04 8:39 ` Markus Elfring
2020-02-04 10:38 ` [Cocci] Replacing usages of “auto” with SmPL? Markus Elfring
2020-02-04 11:01 ` Julia Lawall
2020-02-04 11:45 ` Markus Elfring
2020-02-04 12:07 ` Julia Lawall
2020-02-04 12:18 ` Markus Elfring
2020-02-03 21:31 ` [Cocci] Replacing a std::string check by strcmp() with SmPL Julia Lawall
2020-02-04 8:19 ` Markus Elfring
2020-02-04 12:24 ` [Cocci] Searching for usage of “auto” with SmPL? Markus Elfring
2020-02-04 12:42 ` Julia Lawall
2020-02-04 12:52 ` Markus Elfring
2020-02-03 21:00 ` [Cocci] Replacing a std::string check by strcmp() with SmPL wellington wallace
2020-02-04 13:02 ` Markus Elfring
2020-02-04 13:19 ` Julia Lawall
2020-02-04 13:28 ` Markus Elfring
2020-02-04 13:47 ` Julia Lawall
2020-02-04 14:08 ` Markus Elfring
[not found] ` <alpine.DEB.2.21.2002041524400.3345@hadrien>
2020-02-04 14:42 ` [Cocci] Usage concerns around the SmPL construct “<+... … ...+>” 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=alpine.DEB.2.21.2002032151520.3356@hadrien \
--to=julia.lawall@inria.fr \
--cc=Markus.Elfring@web.de \
--cc=cocci@systeme.lip6.fr \
--cc=wellingtonwallace@gmail.com \
/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 NNTP newsgroup(s).