multiple-inheritance

Virtual Inheritance Memory Layouts I am trying to fully understand what is happening under the hood in the memory with virtual inheritance and vTables/vPtrs and what not. I have two examples of code I have written and I understand exactly why they work however I just want to make sure I have the right idea in my mind, of the object memory layouts. Here are the two examples in a picture, and I just wish to know if my idea of the memory layouts involved are correct. Example 1: class Top { public: int a; }; class Left : public virtual Top { public: int b; }; class Right : public virtual Top {

I'm trying to use C++ abstract base class in the way similar with Java interface. Supposed that we have following interface classes with only pure virtual functions: class Shape { virtual double area()=0; }; class Square : public Shape { virtual void setLength(double length)=0; }; class Rectangle : public Square { virtual void setWidth(double width)=0; }; and I try to implement Square and Rectangle the following way: class SquareImpl : public Square { /*implementation*/ }; class RectangleImpl : public SquareImpl, Rectangle { /*implementation*/ }; Where RectangleImpl inherits both SquareImpl

Currently im studying the C# with ASP.NET MVC 4 with Code First Approach . Im Visual Basic Developer, and Now i want to Start C#. And, now i came accross the situation where i've to manage Multiple Inheritance. But, it is not possible with Class i thought. So, how should i manage these classes i have : //I have the Following Person Class which Hold Common Properties //and a Type of Person e.g : Student, Faculty, Administrative public class Person { public int Id { get; set; } public string FirstName { get; set; } public string LastName { get; set; } public string Type { get; set; } } //This is

What is the limit of multiple inheritance in C++? i.e, how many classes can a class inherit from? Is it implementation dependent or is there a constraint placed on the number of classes you can inherit from in multiple inheritance? It's implementation defined. C++11 gives recommended minimums in the Implementation quantities section of the standard: — Direct and indirect base classes [16 384]. — Direct base classes for a single class [1 024]. [...] — Direct and indirect virtual bases of a class [1 024]. I'd say that's pretty generous. Per §10.1: 1 A class can be derived from any number of base

Raymond Hettinger showed a really cool way to combine collection classes: from collections import Counter, OrderedDict class OrderedCounter(Counter, OrderedDict): pass # if pickle support is desired, see original post I want to do something similar for OrderedDict and defaultdict. But of course, defaultdict has a different __init__ signature, so it requires extra work. What's the cleanest way to solve this problem? I use Python 3.3. I found a good solution here: https://stackoverflow.com/a/4127426/336527 , but I was thinking maybe deriving from defaultdict might make this even simpler? agf

I refer to the following as “multiple re-inheritance”: inheriting a class once directly and one or more times indirectly by inheriting one or more of its descendants inheriting a class indirectly two or more times by inheriting two or more of its descendants I want to know if it exists and how to unambiguously access embedded subobjects. 1.) [ Professional C++ , 2 nd ed.] † states a compilable program can't have a class that directly inherits both its immediate parent and said parent's parent class. Is it true? Given a GrandParent and Parent , which extends GrandParent , VC12 and g++ allows a

This question already has answers here : Can Super deal with multiple inheritance? (2 answers) Possible Duplicate: Can Super deal with multiple inheritance? Python inheritance? I have a class structure (below), and want the child class to call the __init__ of both parents. Is this possible to do in a 'super' way or is it just a terrible idea? class Parent1(object): def __init__(self): self.var1 = 1 class Parent2(object): def _init__(self): self.var2 = 2 class Child(Parent1, Parent2): def __init__(self): ## call __init__ of Parent1 ## call __init__ of Parent2 ## super(Child, self).__init__()