On Thu, 11 Oct 2018, Timur Tabi wrote:
> I'm trying to write a rule that will remove __FUNCTION__ from
> printf-like statements. That is:
>
> NV_PRINTF(x, "%s: ...", __FUNCTION__, ...)
>
> into
>
> NV_PRINTF(x, "...", ...)
>
> I have this, which is based on existing Python code that works, but I
> can't even get it to compile:
>
> @script:python s@
> c << r.c;
> c2;
> @@
> import re
>
> print c, c.find('%s')
> coccinelle.c2 = c
>
> // Get rid of __FUNCTION__ at the beginning of the string
> @@
> expression list[r.n] r.es;
> constant char[] r.c;
> identifier s.c2;
> @@
> NV_PRINTF(es,
> -c, __FUNCTION__
> +c2
> ,...);
>
> This produces:
>
> 23 24
> Fatal error: exception Failure("scriptmeta: parse error: \n = File
> \"/home/ttabi/nv_printf2.cocci\", line 2, column 5, charpos = 23\n
> around = 'r', whole content = c << r.c;\n")
It always checks the metavariables when parsing the semantic patch. That
doesn't involve invoking the python code. It looks like you are missing
the rule r, although I don't know if you have given the complete semantic
patch above.
julia
>
> Besides whatever is wrong with the script, I'm confused as to how
> spatch knows to invoke the Python script in the first place. What is
> it about my unnamed rule that tells spatch to invoke the script?
>
> Also, why is the first parameter (es) an expression list? Can't I
> just use "expression x;" instead?
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>
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