+
−/* Test for recognition of digraphs: should be recognized in C94 and C99
+
−   mode, but not in C90 mode.  Also check correct stringizing.
+
−*/
+
−/* Origin: Joseph Myers <jsm28@cam.ac.uk> */
+
−/* { dg-do run } */
+
−/* { dg-options "-std=iso9899:1999 -pedantic-errors" } */
+
−
+
−#define str(x) xstr(x)
+
−#define xstr(x) #x
+
−#define foo(p, q) str(p %:%: q)
+
−
+
−extern void abort (void);
+
−extern int strcmp (const char *, const char *);
+
−
+
−int
+
−main (void)
+
−{
+
−  const char *t = foo (1, 2);
+
−  const char *u = str (<:);
+
−  if (strcmp (t, "12") || strcmp (u, "<:"))
+
−    abort ();
+
−  else
+
−    return 0;
+
−}