[Cocci] Checking the usage of a SmPL disjunction within a sizeof()

[Cocci] Checking the usage of a SmPL disjunction within a sizeof()

[Markus Elfring]

Hello,

I have tried another tiny script variant out for the semantic patch language
(according to the software combination “Coccinelle 1.0.8-00159-g730dbb03”).

@display@
identifier array, instance;
type T;
@@
*sizeof( \( T \| *(instance->array) \) )


elfring@Sonne:~/Projekte/Coccinelle/Probe> spatch --parse-cocci sizeof-test-20200828.cocci
…
minus: parse error:
  File "sizeof-test-20200828.cocci", line 5, column 17, charpos = 66
  around = '*',
  whole content = *sizeof( \( T \| *(instance->array) \) )


May I expect that such a SmPL disjunction should also work?

Regards,
Markus
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Re: [Cocci] Checking the usage of a SmPL disjunction within a sizeof()

[Julia Lawall]

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On Fri, 28 Aug 2020, Markus Elfring wrote:

> Hello,
>
> I have tried another tiny script variant out for the semantic patch language
> (according to the software combination “Coccinelle 1.0.8-00159-g730dbb03”).
>
> @display@
> identifier array, instance;
> type T;
> @@
> *sizeof( \( T \| *(instance->array) \) )
>

No, you can't compbine a type and an expression in a disjunction.

julia

>
> elfring@Sonne:~/Projekte/Coccinelle/Probe> spatch --parse-cocci sizeof-test-20200828.cocci
> …
> minus: parse error:
>   File "sizeof-test-20200828.cocci", line 5, column 17, charpos = 66
>   around = '*',
>   whole content = *sizeof( \( T \| *(instance->array) \) )
>
>
> May I expect that such a SmPL disjunction should also work?
>
> Regards,
> Markus
> _______________________________________________
> Cocci mailing list
> Cocci@systeme.lip6.fr
> https://systeme.lip6.fr/mailman/listinfo/cocci
>

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Re: [Cocci] Usage of a SmPL disjunction with sizeof()

[Julia Lawall]

On Sat, 29 Aug 2020, Markus Elfring wrote:

> > No, you can't compbine a type and an expression in a disjunction.
>
> Such an information can be reconsidered once more
> because the following script variant for the semantic patch language
> gets accepted by the Coccinelle software.
>
> @display@
> identifier instance, member;
> type T;
> @@
> *\( sizeof(T) \| sizeof(*(instance->member)) \)

The above is fine.  Both branches of the disjunction are expressions.

julia
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