object.h

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#pragma once
#include <cstdint>
#include <string>
#include <memory>

namespace xtd {
  class ustring;
  
  class object {
  public:
    object() = default;

    object(const object&) = default;
    object& operator=(const object&) = default;
    virtual ~object() = default;
    //friend std::ostream& operator <<(std::ostream& os, const object& obj) noexcept {return os << obj.to_string();}

    virtual bool equals(const object& obj) const noexcept;
    
    static bool equals(const object& object_a, const object& object_b) noexcept;
    
    virtual size_t get_hash_code() const noexcept;

    //virtual type get_type() const;
    
    template<typename object_t>
    std::unique_ptr<object_t> memberwise_clone() const {return std::make_unique<object_t>(dynamic_cast<const object_t&>(*this));}
    
    static bool reference_equals(const object& object_a, const object& object_b) noexcept;
    
    virtual xtd::ustring to_string() const noexcept;
  };
  
  std::ostream& operator <<(std::ostream& os, const object& obj) noexcept;
}