Home/ Questions/Q 4043682
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-05-20T13:09:28+00:00

Virtual Public Class is used for a class to ensure that an object of

  • 0

Virtual Public Class is used for a class to ensure that an object of a class inherits only one subobject.

class L { /* ... */ }; // indirect base class
class B1 : virtual public L { /* ... */ };
class B2 : virtual public L { /* ... */ };
class D : public B1, public B2 { /* ... */ }; // valid

Do we have side effect when we use virtual public when we don’t use it for single inheritance. For example, is 

class L { /* ... */ }; // indirect base class
class B1 : virtual public L { /* ... */ };
class D : public B1 { /* ... */ }; // valid

the same as

class L { /* ... */ }; // indirect base class
class B1 : public L { /* ... */ };
class D : public B1 { /* ... */ }; // valid

? I mean, is it just safe to make the parent class as virtual for all possible cases?

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    It’s just as safe to make the parent class virtual “just in case.” The standard doesn’t specify how virtual inheritance will be implemented, but there will probably be a slight performance hit. Unless you’re writing something performance-critical, you shouldn’t need to worry about it.

    • 0