Do all classes have a Vtable created for them by the compiler?

Question

There are many resources online about VTables. They commonly have the same statement regarding them:

\"Whenever a class itself contains virtual functions or ove

Answer 1

Actually, nothing in C++ requires that any class has a vtable - it's entirely an implementation issue. However, a class with virtual functions must somehow support polymorphic function calls, and this will always require a table/map of some sort. This table/map will be created by the compiler for classes that have polymorphic functions, and might (depending on compiler quality) be created for those that don't.