coccinelle/systemd-definitions.iso

   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