#include <iostream>
using namespace std;
 
class Worker;
 
class SomeClass
{
    void* data;
public:
    template<class T> void* GetData(const T*)
    {
        enum { eTEST_FRIEND = T::eFRIEND_SOMECLASS };
        return data;
    }
};
 
struct IWorker
{
	enum { eFRIEND_SOMECLASS =1 };
};
 
class Worker1:public IWorker
{
    SomeClass* object;
public:
    void doSomeWork(){ clear(object->GetData(this));  }
    void clear(void*) { cout<<"Worker1: clear data success\n"; }
};
 
class Worker2:public IWorker
{
    SomeClass* object;
public:
    void doSomeWork(){ clear(object->GetData(this));  }
    void clear(void*) { cout<<"Worker2: clear data success\n"; }
};
 
int main() {
	// your code goes here
 
 
	Worker1().doSomeWork();
	Worker2().doSomeWork();
 
	return 0;
}

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