[Cocci] Match #define with SmPL

[elfring@users.sourceforge.net (SF Markus Elfring)]

> One more, I use 1.0.2 version as I had a problem with  1.0.5
> compilation previously.

Thanks that you added a bit more version information to your bug report.


> I will try bump to 1.0. 5 anyway and check the behavior.

Thanks for your interest to try additional software variants out.

I have tried also the following script out for the semantic patch language
of the software combination "Coccinelle 1.0.5-00089-g0849d71-dirty (OCaml 4.03.0)"
a moment ago.


@macro_deletion@
@@
-#define pr_fmt(fmt) "SVM: " fmt


elfring at Sonne:~/Projekte/Linux/next-patched> spatch.opt ~/Projekte/Coccinelle/Probe/delete_macro1.cocci arch/x86/kvm/svm.c
init_defs_builtins: /usr/local/lib64/coccinelle/standard.h
minus: parse error: 
  File "/home/elfring/Projekte/Coccinelle/Probe/delete_macro1.cocci", line 3, column 29, charpos = 49
  around = 'fmt',
  whole content = -#define pr_fmt(fmt) "SVM: " fmt


Do you eventually know any more software developers who would like to help in the task
"Completion of support for preprocessor statements by the Coccinelle software"?


I would be also looking for an interface to store the text from the macro definition
into a corresponding data structure.

* How do think about to look at another "story" like "Checking printk() calls with SmPL"
  once more?
  https://github.com/coccinelle/coccinelle/issues/54#issuecomment-169988424

* Which metavariable types would be appropriate for the discussed source code transformation?


I would like to point another detail out for further considerations according to
your initial request.

1. I guess that you should use the SmPL asterisk functionality if you are interested
   in only finding (or "matching") a bit of code.

@macro_definition@
@@
*#define pr_fmt(fmt) "SVM: " fmt


init_defs_builtins: /usr/local/lib64/coccinelle/standard.h
minus: parse error: 
  File "/home/elfring/Projekte/Coccinelle/Probe/show_macro_definition1.cocci", line 3, column 29, charpos = 51
  around = 'fmt',
  whole content = *#define pr_fmt(fmt) "SVM: " fmt


2. Do you want to try another source code adjustment out?

@statement_addition@
@@
+#undef  pr_fmt
 #define pr_fmt(fmt) "SVM: " fmt


elfring at Sonne:~/Projekte/Linux/next-patched> spatch.opt ~/Projekte/Coccinelle/Probe/add_undef1.cocci arch/x86/kvm/svm.c
init_defs_builtins: /usr/local/lib64/coccinelle/standard.h
minus: parse error: 
  File "/home/elfring/Projekte/Coccinelle/Probe/add_undef1.cocci", line 4, column 29, charpos = 69
  around = 'fmt',
  whole content =  #define pr_fmt(fmt) "SVM: " fmt


How often would you like to use such search patterns for your source files?

Regards,
Markus