gcc/testsuite/gcc.dg/cpp/macro6.c

   1 /* { dg-do run } */
   2
   3 /* Test that, when a macro expansion spills into the source file, we
   4    expand macros we suck in from there, as the standard clearly states
   5    they are not nested.
   6
   7    Submitter: Neil Booth, with minor modifications to the originals. 3
   8    Dec 2000.
   9    Source: PR 962 and Thomas Pornin.  */
  10
  11 extern void abort (void);
  12 int e = 10, f = 100;
  13
  14 #define e(n) 4 + n
  15 #define X e
  16 #define f(x) x
  17 #define h(x) x + f
  18
  19 int
  20 main ()
  21 {
  22   if (X(X) != 14)               /* Should expand to "4 + e".  */
  23     abort ();
  24
  25   if (X(X(f)) != 108)           /* Should expand to "4 + 4 + f".  */
  26     abort ();
  27
  28   if (h(e)(h(e)) != 120)        /* Should expand to "e + e + f".  */
  29     abort ();
  30
  31   return 0;
  32 }