wrapper.h

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#ifndef WRAPPER_H
#define WRAPPER_H
#pragma once
#include <sstream>
#include <string>
#include "printable.h"

 
namespace original {

template <typename TYPE>
class wrapper : public printable {
public:
    virtual TYPE& getVal() = 0;

    virtual const TYPE& getVal() const = 0;

    virtual void setVal(TYPE data) = 0;

    virtual wrapper* getPPrev() const = 0;

    virtual wrapper* getPNext() const = 0;

    ~wrapper() override = default;

    [[nodiscard]] std::string className() const override;

    [[nodiscard]] std::string toString(bool enter) const override;
};
 
} // namespace original
 
// ----------------- Definitions of wrapper.h -----------------
 
template <typename TYPE>
auto original::wrapper<TYPE>::className() const -> std::string
{
    return "wrapper";
}
 
template<typename TYPE>
auto original::wrapper<TYPE>::toString(const bool enter) const -> std::string
{
    std::stringstream ss;
    ss << this->className() << "("
       << formatString(this) << ", "
       << formatString(this->getVal()) << ")";
    if (enter) ss << "\n";
    return ss.str();
}
 
#endif // WRAPPER_H