union test

class Value
{
public:
  Value() { printf(" Value \n"); }
  ~Value() { printf("~Value \n"); }
};

class Optional
{
public:
   Optional() {}
  ~Optional() {}
private:
  union {
    Value m_value; ///< should be uninitialized ! But Intel Compiler will call Constructor and Destructor here!
  };
};