deleter.h

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#ifndef DELETER_H
#define DELETER_H
 
namespace original {
    template<typename TYPE, template<typename> class DERIVED>
    class deleterBase {
    public:
        template<typename T>
        using rebound_deleter = DERIVED<T>;
 
        constexpr deleterBase() noexcept = default;
 
        virtual ~deleterBase() = 0;
 
        virtual void operator()(const TYPE* ptr) const noexcept = 0;
    };
 
    template<typename TYPE, template<typename> class DERIVED>
    class deleterBase<TYPE[], DERIVED> {
    public:
        template<typename T>
        using rebound_deleter = DERIVED<T>;
 
        constexpr deleterBase() noexcept = default;
 
        virtual ~deleterBase() = 0;
 
        virtual void operator()(const TYPE* ptr) const noexcept = 0;
    };
 
    template<typename TYPE>
    class deleter final : public deleterBase<TYPE, deleter>{
    public:
        constexpr deleter() noexcept = default;
 
        ~deleter() override = default;
 
        void operator()(const TYPE* ptr) const noexcept override;
    };
 
    template<typename TYPE>
    class deleter<TYPE[]> final : public deleterBase<TYPE[], deleter>{
    public:
        constexpr deleter() noexcept = default;
 
        ~deleter() override = default;
 
        void operator()(const TYPE* ptr) const noexcept override;
    };
}
 
template<typename TYPE, template<typename> class DERIVED>
original::deleterBase<TYPE, DERIVED>::~deleterBase() = default;
 
template<typename TYPE, template<typename> class DERIVED>
original::deleterBase<TYPE[], DERIVED>::~deleterBase() = default;
 
template<typename TYPE>
void original::deleter<TYPE>::operator()(const TYPE* ptr) const noexcept {
    delete ptr;
}
 
template<typename TYPE>
void original::deleter<TYPE[]>::operator()(const TYPE* ptr) const noexcept {
    delete[] ptr;
}
 
#endif //DELETER_H