test/macros.c

   1 # include "bool.h"
   2
   3 # define mustard(a,b) ((a) + b + a) /* 1, 2, 3, 4. no proto, 2 no parens, a used twice */
   4 # define ketchup(a)   (a) /* 5. no proto */
   5
   6 # define ok(a, b) ((a) + (b))
   7 #define needparen(a, b) (a + b)           /* 6, 7. no parens a and b */
   8 # define needuse(a, b) (a)                /* 8. b not used */
   9 # define multuse(a, b) ((a) + (a) + (b))  /* 9. a used twice */
  10 # define badassign(a,b) ((a) = (b))       /* 10. assignment to macro */
  11 # define badassign(a,b) ((a)++, ++(b))    /* 11, 12, 13. badassign already defined,
  12                                                          ++ on macro param */
  13
  14 # define predok(a,b) (((a) == 9) ? (b) : -(b))
  15 # define predbad(a,b) (((a) == 8) ? (b) : -3)  /* 14. b not used on false */
  16 # define predbad2(a, b) (((a) == 2) ? (a) : (b) + (b)) /* 15, 16, 17. a used twice,
  17                                                           b used twice, not in true */
  18 # define badorder(a,b) ((b)+(a)) /* ok */
  19 # define okorder(a,b,c) (((a) == 2) ? (b) + (c) : (b) - (c))
  20 # define okorder2(a,b,c) (((a) == 2) ? (((b) == 3) ? (c) : -(c)) : (b) - (c))
  21
  22 # define badval(a, b) ((a) == (b)) /* 18. return value */
  23 # define badconst 5                /* 19. type */
  24 # define goodconst ((5) == (3))
  25 # define worseconst(a) ((a) == 7)  /* 20. constant as parameterized macro */
  26
  27 # define var 5                     /* 21. var as macro */
  28 # define var2(x) ((x) + (x))       /* 22, 23. var as parameterized macro, x used twice */
  29 typedef int twerp ;