#ifndef __STRING_RVALUE_HPP__
#define __STRING_RVALUE_HPP__

class String
{
private:
	char* ptr;
	int size;	// size is the maximum size of the array (string) including '\0'

public:
	String() { ptr = NULL; size = 0; }
	String(int s) { ptr = new char[s]; size = s; }

	String(String& str2);	// copy constructor; lvalue reference; 
	String(String&& str2);	// move constructor; rvalue reference;

	String& operator= (String& str2); // overloading assignment operator; lvalue reference; 
	String& operator= (String&& str2); // overloading move assignment operator; rvalue reference; 

};

// copy constructor; lvalue reference;
String::String(String& str2)
{
	size = str2.size;
	ptr = new char[size];		// allocate new space

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

// move constructor; rvalue reference;
String::String(String&& str2)
{
	size = str2.size;
	ptr = str2.ptr;		// do not allocate new space

	str2.ptr = NULL;	// important

}

// overloading assignment operator; lvalue reference; 
String& String::operator= (String& str2)
{
	if (this != &str2)
	{
		if (ptr != NULL)
			delete[] ptr;
		size = str2.size;
		ptr = new char[size];

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

	return *this;
}

// overloading move assignment operator; rvalue reference; 
String& String::operator= (String&& str2)
{
	if (this != &str2)
	{
		if (ptr != NULL)
			delete[] ptr;

		ptr = str2.ptr;
		size = str2.size;

		str2.ptr = NULL;

	}

	return *this;
}


#endif