1b8e80941Smrg#define X(x) x 2b8e80941Smrg#if 0 3b8e80941Smrg#elif X( \ 4b8e80941Smrg 1 \ 5b8e80941Smrg ) 6b8e80941Smrgint foo(); 7b8e80941Smrg#endif 8