gcc/testsuite/gcc.dg/cpp/digraphs.c

   1 /* Copyright (C) 2000 Free Software Foundation, Inc.  */
   2
   3 /* { dg-do run } */
   4 /* { dg-options "-std=c99" } */
   5
   6 /* Fully test the 6 digraphs under c99 assumptions.  Four are pasted,
   7    to check that digraph pasting works.  */
   8
   9 extern int strcmp (const char *, const char *);
  10 extern void abort (void);
  11 extern int puts (const char *);
  12 #define err(str) do { puts(str); abort(); } while (0)
  13
  14 %:define glue(x, y) x %:%: y    /* #define glue(x, y) x ## y. */
  15 #ifndef glue
  16 #error glue not defined!
  17 #endif
  18 %:define str(x) %:x             /* #define str(x) #x */
  19
  20 int main (int argc, char *argv<::>) /* argv[] */
  21 glue (<, %) /* { */
  22              /* di_str[] = */
  23   const char di_str glue(<, :)glue(:, >) = str(%:%:<::><%%>%:);
  24
  25   /* Check the glue macro actually pastes, and that the spelling of
  26      all digraphs is preserved.  */
  27   if (glue(str, cmp) (di_str, "%:%:<::><%%>%:"))
  28     err ("Digraph spelling not preserved!");
  29
  30   return 0;
  31 glue (%, >) /* } */