gcc/testsuite/gcc.dg/c90-digraph-1.c

   1 /* Test for recognition of digraphs: should be recognized in C94 and C99
   2    mode, but not in C90 mode.  Also check correct stringizing.
   3 */
   4 /* Origin: Joseph Myers <jsm28@cam.ac.uk> */
   5 /* { dg-do run } */
   6 /* { dg-options "-std=iso9899:1990 -pedantic-errors" } */
   7
   8 #define str(x) xstr(x)
   9 #define xstr(x) #x
  10 #define foo(p, q) str(p %:%: q)
  11
  12 extern void abort (void);
  13 extern int strcmp (const char *, const char *);
  14
  15 int
  16 main (void)
  17 {
  18   const char *t = foo (1, 2);
  19   const char *u = str (<:);
  20   if (strcmp (t, "1 %:%: 2") || strcmp (u, "<:"))
  21     abort ();
  22   else
  23     return 0;
  24 }