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)
13 if (X == NULL) S => if (!X) S
20 if (X != NULL) S => if (X) S