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* [Cocci] Checking parsing difficulties around SmPL when constraints
@ 2019-09-11  7:42 Markus Elfring
  2019-09-11  8:19 ` Julia Lawall
  0 siblings, 1 reply; 3+ messages in thread
From: Markus Elfring @ 2019-09-11  7:42 UTC (permalink / raw)
  To: Coccinelle

Hello,

A specific test case is available for the semantic patch language.
https://github.com/coccinelle/coccinelle/blob/560c3d02e2085e83e9bcd40842eec7e774140131/tests/nest3.cocci

Can the following code variant work also under other circumstances?

@extra@
expression x;
position p;
@@
(sizeof(*(x@p))
|__alignof__(*(x@p))
)

@display@
expression action, x, y, z;
position p != extra.p;
statement es;
@@
*if (!x)
 {
    (<+... when != (x) = y
(
*   *(x@p)
|   action(z,
*          x@p
           , ...)
)
    ...+>);
 }
 else
    es


elfring@Sonne:~/Projekte/Coccinelle/janitor> spatch --parse-cocci show_null_pointer_usage13.cocci
…
minus: parse error:
  File "show_null_pointer_usage13.cocci", line 16, column 11, charpos = 178
  around = 'when',
  whole content =     (<+... when != (x) = y


Regards,
Markus
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2019-09-11  7:42 [Cocci] Checking parsing difficulties around SmPL when constraints Markus Elfring
2019-09-11  8:19 ` Julia Lawall
2019-09-11  9:09   ` Markus Elfring

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