运算符重载,拷贝构造------C++

运算符重载,拷贝构造

=运算符重载和类的拷贝构造

enum enum_type {
	mNone = 0,				// 无效
	mInt = 1,				// 整形
	mDouble = 2,			// 浮点数
	mLong = 3,				// 长整形
	mString = 4			// 字符串
};

class text_class
{
public:
	enum_type type{ mNone };
	size_t length{ 0 };
	unsigned char* data{ nullptr };

	// = 运算符重载
	text_class& operator=(const text_class& other)
	{
		if (this != &other) // 避免自我赋值
		{
			this->type = other.type;
			this->length = other.length;
			// 释放原有的 data
			if (this->data != nullptr)
			{
				delete[] this->data;
			}
			// 分配新的内存并复制数据
			this->data = new unsigned char[other->length];
			memcpy(this->data, other.data, other->length);
		}
		return *this;
	}


	// 拷贝函数
	text_class(const text_class& other)
	{
		this->type = other.type;
		this->length = other.length;
		// 释放原有的 data
		if (this->data != nullptr)
		{
			delete[] this->data;
		}
		this->data = new unsigned char[other.length];
		memcpy(this->data, other.data, other.length);
	}

    // 析构
	~text_class()
	{
		if (data != nullptr)
		{
			// 释放 data
			delete[] data;
		}
	}
	// 构造函数
	text_class() {}
};