#include <iostream>
 
class Handle {
public:
  Handle(): mValue(newValue()) {};
 
  static const Handle kUndefHandle;
 
  int value() const { return mValue; }  // Added accessor for demonstration.
 
protected:
  Handle(int val): mValue(val) {};
  int mValue;
  static int mNextValue;
 
  static int newValue() { return mNextValue++; }
};
 
const Handle Handle::kUndefHandle(0);
 
int Handle::mNextValue = 1000;
 
class FakeHandle : public Handle
{
public:
	FakeHandle(int val) : Handle(val) { }
};
 
int main() {
	Handle bad = FakeHandle(5);
	std::cout << bad.value() << std::endl;
}

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