Is virtual destructor needed even if we have other virtual method

Question

Hi

I was under assumption that virtual destructor is needed only if there is no other virtual methods.

If a class has at least one virtual method defined, destructor not marked as virtual will also work and call both derived and base destructor. This is not replicated in code below:
https://www.sololearn.com/en/compiler-playground/csccofAbbQ01

Is this behavior updated recently or we must mark destructor virtual irrespective of other method being virtual or not.

Answer 1

you need virtual destructor in your base class when you do polymorphic deletion.

inheritance really have big hidden costs...
https://softwareengineering.stackexchange.com/questions/284561/when-not-to-use-virtual-destructors

prefer composition instead of inheritance
https://stackoverflow.com/questions/49002/prefer-composition-over-inheritance