我正在尝试在一个超类中实现一个方法,它应该可以在子类中使用,但不能改变。请考虑以下内容: universalBehavior(): void { specializedBehavior(); // Delegate specialized stuff to sub classes
protected abstract speci
class ClassSealer { friend class Sealed;}; // ...class FailsToDerive : public Sealed // This class is capable of being instantiatedclass ClassSealer { friend cl