[英]Fine grained access specifiers c++
I have the following class :- 我有以下课程: -
class A {
public:
// some stuff that everyone should see
protected:
// some stuff that derived classes should see
private:
// some stuff that only I can see
void f();
void g();
};
Now, I want f() to only be accessible from a certain set of classes (say classes B,C,D) and g() to be accessible from a certain other set of classes (say classes D,E,F). 现在,我希望f()只能从一组特定的类(比如类B,C,D)和g()访问,以便可以从某些其他类(例如D,E,F类)访问。 Is there any way to specify this in C++?
有没有办法在C ++中指定它? If I make all the classes friends of A, then both f & g will be accessible from B,C,D,E,F (along with the other private members of A) which is not what I want.
如果我把A的所有班级成为朋友,那么这两个f&g都可以从B,C,D,E,F(以及A的其他私人成员)访问,这不是我想要的。
Is this possible or should I change my object model? 这是可能的,还是应该更改我的对象模型?
class A_f {
friend class B;
void f();
};
class A_g {
friend class C;
void g();
};
class A: public A_f, public A_g {
friend class A_f;
friend class A_g;
private:
void do_f();
void do_g();
};
inline void A_f::f() { static_cast<A *>(this)->do_f(); }
inline void A_g::g() { static_cast<A *>(this)->do_g(); }
void B::something(A *a) {
a->f();
}
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