Recursively defined structures

[sraiderk]

Recursively defined structures not permitted why?

typedef struct x
{
struct x y *z1
struct x y *z2
} sdf

[PCM programmer]

It probably doesn't work, but if you want us to test it, you need to
post code that is compilable on at least some compiler (like MSVC).
Your current code is not compilable.

[Wayne_]

First of all your code is flawed.
You are missing commas and a semicolons.
You are also redefining y.


Now the problem is it will take up infinate space as when you create the structure (The sdf at the end does this) it then goes on to reserve memory for itself and within that you create another version of itself, the struct x y, *Z1; does this. The pointer is OK but the struct x y actually reserves memory for a new structure and calls it y (sdf.y). This in turn creates another structure of type x with a struct y in it (sdf.y.y) and so on and so on (sdf.y.y.y.y.y.y.y.y.y......).

As I said, pointers are ok so:-

typedef struct X {
struct X *z;
} myX;

Is the way you should do it.