c++ - 如何创建可以在 C++ 中分配任何类型的对象

Question

我有这样一个类定义:

class Paint{
 AnyType* Color;
};

我想做的是创建一个类(AnyType)，其对象可以分配给任何类类型的任何对象。像这样:

class Blue{}; 
class Green {};`

Paint MyPaint;
MyPaint.Color = new Green();
// color gets changed
MyPaint.Color = new Blue();

如何声明 AnyType？

Class AnyType{
//class definition
};

Answer 1

class Paint{
 BaseColor* Color;
};

class BaseColor {}

class Blue : BaseColor {}; 
class Green : BaseColor {};`

Paint MyPaint;
MyPaint.Color = new Green();
// color gets changed
MyPaint.Color = new Blue();