##C typedef struct struct_t struct_t;
typedef int (func)(const struct_t s); struct struct_t { int i; func f; };

int main()
{
	struct struct_t ttt_;
	return 0;
}

##C++

class struct_t;
typedef int (*func)(const struct_t* s);
class struct_t
{
	int i;
	func f;
};

int main()
{
	struct_t ttt_;
	return 0;
} 

gcc 4.4和msvc 2012测试OK

##参考

1. http://www.cppblog.com/codejie/archive/2009/11/19/101382.html
2. http://www.embedded.com/electronics-blogs/programming-pointers/4024450/Tag-vs-Type-Names