[thirdparty/systemd.git] / coccinelle / systemd-definitions.iso

/* Statement isomorphisms - replace explicit checks against NULL with a
 * shorter variant, which relies on C's downgrade-to-bool feature.
 * The expression metavariables should be declared as pointers, however,
 * that doesn't work well with complex expressions like:
 * if (UNIT(p)->default_dependencies != NULL)
 */

Statement
@@
expression X;
statement S;
@@
if (X == NULL) S => if (!X) S

Statement
@@
expression X;
statement S;
@@
if (X != NULL) S => if (X) S
Commit	Line	Data
b3fd7b53 FS	1	/* Statement isomorphisms - replace explicit checks against NULL with a
	2	* shorter variant, which relies on C's downgrade-to-bool feature.
	3	* The expression metavariables should be declared as pointers, however,
	4	* that doesn't work well with complex expressions like:
	5	* if (UNIT(p)->default_dependencies != NULL)
	6	*/
	7
	8	Statement
	9	@@
	10	expression X;
	11	statement S;
	12	@@
	13	if (X == NULL) S => if (!X) S
	14
	15	Statement
	16	@@
	17	expression X;
	18	statement S;
	19	@@
	20	if (X != NULL) S => if (X) S