在不使用未命名命名空间的情况下将 C++ 类隐藏在标头中
我正在编写一个 C++ 头文件，我在其中定义了一个
I am writing a C++ header in which I define a
class A {
// ...
};
我想对外界隐藏(因为它可能会在此标头的未来版本中更改甚至被删除).
that I would like to hide from the outside world (because it may change or even be removed in future versions of this header).
在同一个头文件中还有一个 B 类，它有一个 A 类的对象作为成员:
There is also a class B in the same header that has an object of class A as a member:
class B {
public:
// ...
private:
A a_;
};
什么是对外界隐藏A级的正确方法?
What is a proper way of hiding class A from the outside world?
如果我将 A 的定义放在未命名的命名空间中，编译器会发出警告，因此我假设由于内部链接问题，我应该做其他事情.
If I put the definition of A in an unnamed namespace, the compiler issues a warning, so I assume that, due to issues with internal linkage, I should do something else.
推荐答案
你可以做一个内部类:
class B
{
class A { /* ... */ };
A a_;
}
相关文章