static struct in C/C++

Question

static struct K {  int x; };

Is this valid in C and C++?

Answer 1

In C, it's valid but useless.

In C++ it's invalid. You can only specify storage class for objects and functions.

Answer 2

Valid in C. Ill-formed in C++

In C++, specifiers extern/static can only be applied to names of objects or functions

Check out

C.1.5 Clause 7: declarations (7.1.1) ISO C++03

---

Answer 3

No... That is not valid in C++. An alternative is (C++) : unnamed namespace

namespace 
{
   struct K {  int x; };
}

See this related topic:

Superiority of unnamed namespace over static?