I have a code like this using CRTP and C++20: Is there a way to remove "vptr" so the object won't take 8 bytes (for x64) and instead will take o ...
I have a code like this using CRTP and C++20: Is there a way to remove "vptr" so the object won't take 8 bytes (for x64) and instead will take o ...
Base class: Derived class: Above code throws a "return type is not identical/covariant error". I've read few discussions on it. This one is sim ...
Consider that: I thought that in C++ the implementation of B::f() is something like that: Is D::vf() called through the virtual mechanism in the ...
Given: Example.h Example.cpp Say that I wanted to create an instance of Derived from "scratch". As it contains a virtual function, from Base, h ...
The output is I expected it to be 8 bytes longer - vptr pointer. But for what the rest 4 bytes is used? I found quite many forum posts (all from ...
I know that if a class contains any virtual functions, most compilers (if not all) add a vptr pointer to its objects. Some add it as the first element ...
I am watching the BackToBasics talk: Virtual Dispatch and Its Alternatives from CppCon2019. The presenter says and the slide shows (assuming I haven' ...
I read this question: C++ Virtual class inheritance object size issue, and was wondering why virtual inheritance results in an additional vtable point ...
As can be seen, D3 introduces a new virtual function, @function3(), in the middle of the chain of inheritance. I am wondering what is happening with * ...
As far i know when we make a function virtual in base class a pointer which can be referred as vptr is created by the compiler and a vtable which hold ...
In the following question one of the answers suggested that the dynamic type of an object cannot change: When may the dynamic type of a referred to ob ...
I want to know if there be two "vptr" created for resolving virtual functions, one in the "Base" class which will be inherited in Derived class obje ...
I think sizeof(Base) should be 12. Why is it 16? Without the virtual function, I get 4 and 8. class Base{ public: int i; virtual void Prin ...
In object slicing,when a derived class object is copied to a Base class object , does the _vptr of Derived class also gets copied to _vptr of Base cla ...
C++ gurus. Need your help with this little head scratcher: The code is pretty straightforward: have a base object on stack, placement-new a derived ...
Let say I have a simple class hierarchy as follows with a common api: when I use the base class pointer I get the correct dispatch as follow: Wh ...
The below code is of multiple inheritance where every class has one member variable, one normal function and one virtual function. Output of the pr ...
I can understand why dynamic_cast does work in this case : But why if you remove the polymorphism from B it still works : Is it because dynamic_ ...
I read that an abstract class can still have a table. But I'm confused on how many entries it would have in its vtable. For example, if my abstract cl ...
I read this article: https://shaharmike.com/cpp/vtable-part2/ And I can not understand why in the vtable (at the end of article) we have this pointer ...