ref: 94f23734015424515144b54f0a9f9d6c9d2f34c2 dir: /tests/cc/execute/0197-cppcomment.c/
#define TEST1 1 // comment #define TEST2 2 int main(void) { if (TEST1 != 1) return 1; if (TEST2 != 2) return 2; return 0; }