PolymorphicCloneFluentCpp.cpp

struct Interface1
{
    virtual std::unique_ptr<Interface1> cloneInterface1() const = 0;
    //...
};
 
struct Interface2
{
    virtual std::unique_ptr<Interface2> cloneInterface2() const = 0;
    //...
};
 
class Implementation : public Interface1, public Interface2
{
public:
    virtual std::unique_ptr<Interface1> cloneInterface1() const override { /* ... */ }
    virtual std::unique_ptr<Interface2> cloneInterface2() const override { /* ... */ }
    //...
};