#ifndef __STRING_RVALUE__
#define __STRING_RVALUE__

#include <iostream>

class String
{
private:
	char* ptr;
	int stringSize;	// number of chars in the string including '\0'

public:
	String() { ptr = NULL; stringSize = 0; }
	String(char c) 
	{ 
		ptr = new char[2]; 
		ptr[0] = c; 
		ptr[1] = '\0'; 
		stringSize = 2;
	}
	String(const char* str, int size)
	{
		stringSize = size;
		ptr = new char[size];
		for (int i = 0; i < size; i++)
			ptr[i] = str[i];
	}

	// copy constructor
	// 
	String(String& str2)	// str2 -- lvalue reference
	{
		stringSize = str2.stringSize;

		ptr = new char[stringSize];		// allocate new resource

		for (int i = 0; i < stringSize; i++)
		{
			ptr[i] = str2.ptr[i];
		}
	}

	// move constructor
	// 
	String(String&& str2)	// str2 -- rvalue reference
	{

		stringSize = str2.stringSize;

		// do not allocate new space for ptr array
		ptr = str2.ptr;

		str2.ptr = NULL;
		str2.stringSize = 0;

	}

	String & opertor=(String& str2)		// str2 -- lvalue reference
	{
		stringSize = str2.stringSize;

		if (ptr == NULL)
			ptr = new char[stringSize];		// allocate new resource
		else
		{
			delete ptr;
			ptr = new char[stringSize];		// allocate new resource
		}

		for (int i = 0; i < stringSize; i++)
		{
			ptr[i] = str2.ptr[i];
		}

		return *this;
	}

	// move assignment operator
	String& opertor = (String&& str2)		// str2 -- rvalue reference
	{
		if (this != &str2)
		{
			stringSize = str2.stringSize;

			if (ptr != NULL)
			{
				delete ptr;
				ptr = NULL;
			}

			ptr = str2.ptr;

			str2.ptr = NULL;
			str2.stringSize = 0;
		}
		return *this;
	}

};


#endif