Re: Struct Error

bart <bc@freeuk.com> writes:

Gcc 14.1 gives me an error compiling this code:
>
  struct vector;
  struct scenet;
>
  struct vector {
      double x;
      double y;
      double z;
  };
>
  struct scenet {
      struct vector center;
      double radius;
      struct scenet (*child)[];
  };
>
The error is:
>
  error: array type has incomplete element type 'struct scenet'
   struct scenet (*child)[];
                  ^~~~~
>
Is there any way to fix this, or is it not possible?
>
(This comes from generated code.  Idiomatic C would use a T* here
rather than T(*)[], but that is not an option.  Other compilers like
tcc, DMC and mine have no problem with it.)

The code shown violates a constraint in the C standard, because
the element type of the array declarator is an incomplete type
at the point the 'child' member is declared, so a diagnostic
is required.