1 #define TWO a, b
   2 
   3 #define UNARY(x) BINARY(x)
   4 #define BINARY(x, y) x + y
   5 
   6 UNARY(TWO)
   7 /*
   8  * check-name: Preprocessor #2
   9  * check-command: sparse -E $file
  10  *
  11  * check-output-start
  12 
  13 a + b
  14  * check-output-end
  15  */