gcc/testsuite/gcc.dg/c90-array-lval-2.c

   1 /* Test for non-lvalue arrays decaying to pointers: in C99 only.  */
   2 /* Origin: Joseph Myers <jsm28@cam.ac.uk> */
   3 /* { dg-do compile } */
   4 /* { dg-options "-std=iso9899:1990 -pedantic-errors" } */
   5
   6 struct s { char c[17]; };
   7
   8 struct s x;
   9
  10 extern struct s foo (void);
  11
  12 #define ASSERT(v, a)    char v[((a) ? 1 : -1)]
  13
  14 ASSERT (p, sizeof (x.c) == 17);
  15 ASSERT (q, sizeof (0, x.c) == sizeof (char *));
  16 ASSERT (r, sizeof ((foo ()).c) == 17);
  17 /* The non-lvalue array does not decay to a pointer, so the comma expression
  18    has (non-lvalue) array type.
  19 */
  20 ASSERT (s, sizeof (0, (foo ()).c) == 17); /* { dg-bogus "array" "bad non-lvalue array handling" } */