Program Listing for File clonable.h

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#ifndef CPPHOTS_INTERFACES_CLONABLE_H
#define CPPHOTS_INTERFACES_CLONABLE_H


namespace cpphots{

namespace interfaces {

template <class Base>
struct ClonableBase {

    virtual Base* clone() const = 0;

};

template <class Derived, class Base>
struct Clonable : public virtual Base {

    Base* clone() const override {
        return new Derived(static_cast<Derived const&>(*this));
    }

    using Base::Base;

};

}

}

# endif