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=iso9899:1999 -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, "12") || strcmp (u, "<:"))
      21      abort ();
      22    else
      23      return 0;
      24  }