Will using delete with a base class pointer cause a memory leak?

Question

Given two classes have only primitive data type and no custom destructor/deallocator. Does C++ spec guarantee it will deallocate with correct size?

struct A { in         


        

Answer 1

For only primitive data I believe you're fine. You might legitimately not want to incur the cost of a v-table in this case. Otherwise, a virtual d'tor is definitely preferred.