gcc/testsuite/gcc.dg/cpp/mac-dir-1.c

   1 /* Copyright (C) 2002 Free Software Foundation, Inc.  */
   2
   3 /* { dg-do preprocess } */
   4
   5 /* Source: Neil Booth, 26 Feb 2002.
   6
   7    Test that we allow directives in macro arguments.  */
   8
   9 /* { dg-do run } */
  10 /* { dg-options "" } */
  11
  12 #define f(x) x
  13 extern void abort (void);
  14
  15 int main ()
  16 {
  17   if (f (
  18 #if f(1)                        /* True.  */
  19         0))                     /* False. */
  20 #else
  21         1))
  22 #endif
  23      abort ();
  24
  25      /* Outer f expands to original definition, f in argument expands
  26         to new definition, so result is: if (1 != 2 - 1).  */
  27      if (1 != f(2
  28 #undef f
  29 #define f - 1
  30      f))
  31      abort ();
  32
  33      return 0;
  34 }