vcmi/lib/ConstTransitivePtr.h

/*
 * ConstTransitivePtr.h, part of VCMI engine
 *
 * Authors: listed in file AUTHORS in main folder
 *
 * License: GNU General Public License v2.0 or later
 * Full text of license available in license.txt file, in main folder
 *
 */
#pragma once

class CGameHandler;

VCMI_LIB_NAMESPACE_BEGIN

template <typename T>
class ConstTransitivePtr
{
	T *ptr = nullptr;
	ConstTransitivePtr(const T *Ptr)
		: ptr(const_cast<T*>(Ptr)) 
	{}
public:
	ConstTransitivePtr(T *Ptr = nullptr)
		: ptr(Ptr) 
	{}
	ConstTransitivePtr(std::nullptr_t)
	{}
	const T& operator*() const
	{
		return *ptr;
	}
	T& operator*()
	{
		return *ptr;
	}
	operator const T*() const
	{
		return ptr;
	}
	T* get()
	{
		return ptr;
	}
	const T* get() const
	{
		return ptr;
	}
	operator T*() 
	{
		return ptr;
	}
	T *operator->() 
	{
		return ptr;
	}
	const T *operator->() const 
	{
		return ptr;
	}
	const T*operator=(T *t)
	{
		return ptr = t;
	}

	void dellNull()
	{
		delete ptr;
		ptr = nullptr;
	}

	template <typename Handler> void serialize(Handler &h, const int version)
	{
		h & ptr;
	}

	friend class ::CGameHandler;
};

VCMI_LIB_NAMESPACE_END