#include <tuple>
#include <utility>
 
template< typename... DataMembers > 
class SwapMethodProvider
{
public:
 
    inline void Swap( SwapMethodProvider& other );
 
private:
 
    std::tuple< DataMembers... > member_dataMembers;
 
};
 
template< typename... DataMembers >
inline void SwapMethodProvider< DataMembers... >::Swap( SwapMethodProvider& other )
{
    // Swap between the tuples that contain the data members
    std::swap( member_dataMembers, other.member_dataMembers );
}
 
class ExtraSauce : public SwapMethodProvider< int, double >
{};
 
class EvenMoreExtraSauce : public ExtraSauce, public SwapMethodProvider< std::string >
{};
 
int main(){}

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