I recently learned that empty class have size 1 instead of zero.Why it has no byte alignment, in which it's size should be 4 in 32bit environment? Wha ...
The following function appears in the OctoMap code: class AbstractOcTreeNode {}; -> They declare an empty class AbstractOcTreeNode** children; -& ...
I would like to craft an "interface"/mix-in class (template), and ensure nobody thinks that adding a member to this class template is a good idea, I'd ...
Suppose I have a type F. I know that F is empty, but F has no default constructor, so I can't use F() to construct it. Is there a way to obtain a vali ...
Are there still good reasons to use chainned base cases rather than a flat multiple inheritance? It used to be the case that some classes were design ...
Given this code: Need to add new setter method to change the person's age. I'm trying to add an empty age setter method, but get an error message U ...
In the book Effective C++, I saw the passage below: As a result, if you write it's essentially the same as if you'd written this: The ...
Its output is: 0 0 0 0xbff36ad0 0xbff36ac8 numbers of elements is: 4 The results are so surprising. As shown above, Empty is a class, th ...
In Base class , since i is private , it should not be inherited to the Derived Class . Hence , the Base class should act as empty class . And sizeof ...
Below is an excerpt from "Programming: Principles and Practice Using C++". I'm confused by the throw Bad_area() notation. The book tries to explain it ...
I have two classes: Now if i want to create new instance of Human, i have to do Human person = new Human(); But when i try to access like person.pr ...
Why is the empty base class optimization (EBO) not being fully applied in Visual C++? If I have a lot of base classes, is there any way for me to hel ...
I'm teaching a Python class on object-oriented programming and as I'm brushing up on how to explain classes, I saw an empty class definition: The e ...
The above code can't be compiled, could anyone of you tell me why? ...
What is the size of an empty class in C++ and Java? Why is it not zero? sizeof(); returns 1 in the case of C++. ...
Microsoft's GDI+ defines many empty classes to be treated as handles internally. For example, (source GdiPlusGpStubs.h) There are other two ways to ...