old-autovect-branch/gcc/testsuite/gcc.dg/cpp/vararg1.c

   1 /* { dg-do run } */
   2 /* { dg-options -w } */
   3
   4 /* count() used to give 1 owing to a buggy test for varargs.  */
   5 #define count(y...)  count1 ( , ##y)
   6 #define count1(y...) count2 (y,1,0)
   7 #define count2(_,x0,n,y...) n
   8 #if count() != 0 || count(A) != 1
   9 #error Incorrect vararg argument counts
  10 #endif
  11
  12 /* Test for changed behavior of the GNU varargs extension.
  13    ##args, where args is a rest argument which received zero tokens,
  14    used to delete the previous sequence of nonwhitespace characters.
  15    Now it deletes the previous token.  */
  16
  17 #include <string.h>
  18
  19 #define S(str, args...) "  " str "\n", ##args
  20
  21 int
  22 main()
  23 {
  24   const char *s = S("foo");
  25   return strchr (s, '\n') == NULL;
  26 }