Hello,

is it somehow possible to have struct prototypes?

I would like to declare circular types.

However, the following code does not work:

Code:

---

struct PARENT; // this is intended to be a struct prototype

typedef struct CHILD {
  PARENT* parent;
} CHILD;

typedef struct PARENT {
  CHILD* child;
} PARENT;

---

I receive the following compiler error message:

Quote:

---

PARENT (struct) undeclared identifier
struct PARENT;

---

Thanks

Normally you would do this like so:

Code:

---

typedef struct PARENT PARENT;
typedef struct CHILD CHILD;

struct CHILD {
PARENT  *parent;
};
struct PARENT  {
CHILD *child;
};

---

But that doesn't work, so I think it's a bug.

Use void*'s instead and do safe typecasting.

Thank you both very much for your help!

With void* and some typecasting it works fine now.