Effective C++学习笔记 条款06：如不想使用编译器自动生成的函数，就该明确拒绝

class A
{
    public:
        A(const string& name):m_name(name) {}
    private:
        //拒绝copy和赋值,声明为private，并且只声明不实现
        A(const A&);
        A& operator=(const A&);
    private:
        string m_name;
};

class Uncopyable
{
    public:
        Uncopyable() {}
        ~Uncopyable() {}
    private:
        Uncopyable(const Uncopyable&);
        Uncopyable& operator=(const Uncopyable&);
};

class A: public Uncopyable // 继承Uncopyable不一定要是public !
{
    public:
        A(const string& name): m_name(name) {}
    private:
        string m_name;

};