1 #define a a|
   2 #define b(x) x
   3 
   4 b(a)
   5 /*
   6  * check-name: Preprocessor #5
   7  * check-description: Yet more examples from comp.std.c.
   8  * check-command: sparse -E $file
   9  *
  10  * check-output-start
  11 
  12 a|
  13  * check-output-end
  14  */