class A
{
public:
friend T;
private:
A() {}
~A() {}
};
class B:virtual public A<B>
{
public:
B() {}
~B() {}
};
class C :public B
{
public:
C() {} // 报错,A<T>::A(T = B)不可访问
~C() {}
};
写一个不能被继承的类(友元的不可继承性)
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转载自blog.csdn.net/m0_37313888/article/details/105171267
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