cloneable.h

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#ifndef CLONEABLE_H
#define CLONEABLE_H
 
 
namespace original {
template<typename DERIVED>
class baseCloneable {
protected:
    baseCloneable() = default;
 
public:
    [[nodiscard]] virtual DERIVED* clone() const;
 
    virtual ~baseCloneable() = default;
};
 
class cloneable : public baseCloneable<cloneable> {
protected:
    cloneable() = default;
 
public:
    ~cloneable() override = default;
};
 
} // namespace original
 
// ----------------- Definitions of cloneable.h -----------------
 
template<typename DERIVED>
auto original::baseCloneable<DERIVED>::clone() const -> DERIVED* {
    return new DERIVED(static_cast<const DERIVED&>(*this));
}
 
#endif //CLONEABLE_H