Structs do not see each other

I have two structs. One of them includes pointer member that points to other one. This situation is valid for both structs.

For example;

myHeader.h:

Code:

---

struct A{
   
    B* x;
};

struct B{

    A* y;
};

---

No matter what I do, A does not see B. Finally, I wrote struct B; at the top of the code, which eliminated the problem. Is this terminologically right ? Can you give another solution to me for this ?

Quote:

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Originally Posted by goktug1514

Finally, I wrote struct B; at the top of the code, which eliminated the problem. Is this terminologically right ? Can you give another solution to me for this ?

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That is correct. The compiler needs to see B, the type you're trying to use when you're declaring an instance of its type. Since the definition of B comes later, you have to tell the compiler it exists by forwarding declaring the struct.

As for whether there's another solution or not, that's usually difficult to say unless we know what you're trying to do. One idea might be to try to find a common intersection of A and B and break that out into a class/struct C which both A and B can reference.

Code:

---

struct B;

---

That's a declaration of B. It's also known as "forward declaration". At this point type B is incomplete, but you can use it to declare pointers to B or references to B (it's a tad more complicated with smart pointers... But it's possible).

Thank you for your helps :)
I handled it.