How do you handle a “cannot instantiate abstract class” error in C++?

Question

How do you handle a \"cannot instantiate abstract class\" error in C++? I have looked at some of the similar errors here and none of them seem to be exactly the same or prob

Answer 1

Visual Studio's Error List pane only shows you the first line of the error. Invoke View>Output and I bet you'll see something like:

c:\path\to\your\code.cpp(42): error C2259: 'AmbientOccluder' : cannot instantiate abstract class
          due to following members:
          'ULONG MysteryUnimplementedMethod(void)' : is abstract
          c:\path\to\some\include.h(8) : see declaration of 'MysteryUnimplementedMethod'

Answer 2

I have answered this question here..Covariant virtual functions return type problem

See if it helps for some one.