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From: Julia Lawall <julia.lawall@lip6.fr>
To: Markus Elfring <Markus.Elfring@web.de>
Cc: cocci@systeme.lip6.fr
Subject: Re: [Cocci] How to replace obsolete #ifdef's?
Date: Fri, 7 Jun 2019 18:33:48 +0200 (CEST)
Message-ID: <alpine.DEB.2.20.1906071833010.14523@hadrien> (raw)
In-Reply-To: <c2cf2b61-990d-af7b-2228-0e79e0daa0ce@web.de>

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On Fri, 7 Jun 2019, Markus Elfring wrote:

> > but not:
> >
> > @@
> > @@
> >
> > - #ifdef FOO
> >   bar();
> > - #endif
>
> The deletion of these preprocessor statements is not directly supported
> in the shown way by the Coccinelle software at the moment.
> But I got another code transformation idea which would not be so convenient.
>
> The semantic patch language supports the metavariable type “statement list”
> for a while.
> https://github.com/coccinelle/coccinelle/blob/cad4c0705f9e37f501531e133d3a47bc56ed0ce2/docs/manual/cocci_syntax.tex#L209
>
> I imagine then that the function call can be “intentionally” deleted
> and added back in such a simple SmPL script example.
>
> * Should any extra C code vanish after such a special adjustment
>   because specific parts were not restored?
>
> * Can it make sense here to change a bit of code even if it was originally
>   intended to keep it untouched?
>
>
> Will similar software updates become more challenging for the initially
> described handling of designated initialisers for known data structures?

This is in the spirit of the solution I already proposed.  The original
issue was about structure field initializations, not statements, so
statement list is not appropriate.

julia

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Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-05 16:25 [Cocci] how to replace obsolete #ifdef's Enrico Weigelt, metux IT consult
2019-06-05 19:51 ` [Cocci] How to replace obsolete #ifdef's? Markus Elfring
2019-06-05 20:52 ` [Cocci] how to replace obsolete #ifdef's Julia Lawall
2019-06-05 21:42   ` Enrico Weigelt, metux IT consult
2019-06-06  5:46     ` Julia Lawall
2019-06-06  9:30       ` [Cocci] How to replace obsolete #ifdef's? Markus Elfring
2019-06-06 10:34         ` Julia Lawall
2019-06-06 14:20           ` Markus Elfring
2019-06-06 15:34             ` David Young
2019-06-07 12:01           ` Enrico Weigelt, metux IT consult
2019-06-07 12:30             ` Julia Lawall
2019-06-06  9:15     ` Markus Elfring
2019-06-06  9:39       ` Julia Lawall
2019-06-07 12:05         ` Enrico Weigelt, metux IT consult
2019-06-07 12:32           ` Julia Lawall
2019-06-07 13:40             ` Markus Elfring
2019-06-07 16:33               ` Julia Lawall [this message]
2019-06-07 17:26                 ` Markus Elfring
2019-06-07 17:36                 ` Markus Elfring
2019-06-07 18:48 ` Markus Elfring
2019-06-07 18:59   ` Julia Lawall
2019-06-08  7:49   ` [Cocci] Handling of designated initialisers by SmPL? Markus Elfring

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