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From: Julia Lawall <julia.lawall@inria.fr>
To: Timur Tabi <timur@kernel.org>
Cc: cocci <cocci@systeme.lip6.fr>
Subject: Re: [Cocci] Concatenating parameters into a string
Date: Tue, 14 Jan 2020 00:04:36 +0100 (CET)
Message-ID: <alpine.DEB.2.21.2001140003030.2574@hadrien> (raw)
In-Reply-To: <CAOZdJXWwKUPf_4oGk4G2j438n47fntf7J0AEJd7nFbg6+pR6Qw@mail.gmail.com>


On Mon, 13 Jan 2020, Timur Tabi wrote:

> On Mon, Jan 13, 2020 at 4:33 PM Julia Lawall <julia.lawall@inria.fr> wrote:
> >
> > Sorry, I don't follow what you are trying to do here.  Could you send an
> > example of the desired before after C code?  I see what you have above,
> > but I don't see the connection to the rule you have tried to write.
> >
> > I have the feeling that you will want to use some python code to do
> > something with the ##s, but I'm not sure.
>
> I'm hoping to avoid Python.
>
> I'm basically trying to recreate the ## feature of C macros.  For
> example, given:
>
> #define MACRO(a, b)   a##b
>
> I'm looking for a cocci script that replaces
>
>    x = 1 << MACRO(HELLO, _THERE);
>
> with
>
>   x = 1 << HELLO_THERE;

It might be possible to use

@@
identifier a,b;
fresh identifier x = a ## "_" ## b;
@@

- MACRO(a,b)
+ x

julia

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Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-13 22:21 Timur Tabi
2020-01-13 22:33 ` Julia Lawall
2020-01-13 22:46   ` Timur Tabi
2020-01-13 23:04     ` Julia Lawall [this message]
2020-01-14  0:01       ` Timur Tabi
2020-01-14  7:16         ` Julia Lawall

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