如何为boost :: varivant * to be equal to some A*?类型的参数设置值>

Question

说我有

class A {
};
class B {
};

using AOrB = boost::variant <A,B>;

A* ptr2a = ....
AOrB* another_ptr2a = a;//this doesn't compile for me, what is the correct way to do it?
使用boost :: variant *是不好的做法吗？

说我有A类{}； B类{};使用AOrB = boost :: variant ; A* ptr2a = .... AOrB* another_ptr2a = a;//this doesn't compile for me, what is the correct way to do it? is using ...

Answer 1

你不能。 AOrB由A子对象或B子对象组成，这些对象都不能指向现有的A。

您可以将A复制到AOrB