gcc/testsuite/gcc.dg/gnu23-attr-syntax-3.c

   1 /* Test C23 attribute syntax.  Invalid uses of attributes with GNU C
   2    features.  Non-permissive variant.  */
   3 /* { dg-do compile } */
   4 /* { dg-options "-std=gnu23 -w" } */
   5
   6 /* Attributes cannot be used as prefix attributes on old-style
   7    parameter declarations or on function declarators with identifier
   8    lists (removed from C23).  */
   9
  10 void (*f(a, b) [[]])() int a, b; { } /* { dg-error "expected" } */
  11
  12 void f(x, y) int x; [[]] int y; { } /* { dg-error "expected" } */
  13 /* { dg-error "type of 'y' defaults to 'int'" "" { target *-*-* } .-1 } */
  14
  15 /* Nonempty attributes cannot be used as postfix attributes with
  16    __auto_type.  */
  17 __auto_type [[gnu::no_such_attr]] x = 1; /* { dg-error "'__auto_type' followed by" } */