2,756 questions
13
votes
3
answers
1k
views
The 'this' pointer in multiple inheritance of a C++ class
#include <iostream>
using namespace std;
class Base1 {
public:
virtual void foo() { cout << "Base1::foo\n"; }
int b1_data = 1;
};
class Base2 {
public:
virtual void ...
- 313
-1
votes
1
answer
130
views
Python and multiple inheritance [duplicate]
I tried to understand multiple inheritance behaviour with Python, so I tried something but I have no idea why the output of my code is what it is. (I know that diamond inheritance is bad, but was ...
- 3,519
-3
votes
1
answer
68
views
How do I implement multi-inheritance DUPLICATE method in Java?
I have an 8-level hierarchy of classes in Java. This is useful so each abstract class implements methods that are common in the whole sub-branch of the tree. That's working fine.
However, after going ...
- 1,061
1
vote
2
answers
196
views
What does the presence of the keyword `virtual` really do in the context of inheritance?
There are lots of posts on the internet about virtual inheritance in C++.
Typically these posts say something like this:
Virtual inheritance solves the Diamond Inheritance Problem
Virtual inheritance ...
- 18.6k
0
votes
0
answers
114
views
Multiple inheritance in C++ with ambiguous (or duplicated) virtual function names [duplicate]
Let's start with a code example:
#include <iostream>
class Base1 {
public:
virtual ~Base1() {}
virtual void f() {
std::cout << "Base1.f()" << std::...
- 18.6k
-1
votes
2
answers
105
views
C# - Derived class that can inherit either one class OR another
This question is NOT about inheriting two classes.
This question is about inheriting ONE of two classes. One OR the other.
I have an external unchangeable DLL that provides me with two abstract ...
- 86.7k
7
votes
2
answers
185
views
C++ class with multiple inheritance and covariant return types
I am trying to understand a compile error from the latest version of
VC++. The error occurs in a class that inherits from two base classes and
includes a virtual function that overrides functions in ...
- 235
0
votes
1
answer
151
views
Subclass of tkinter's Toplevel class doesn't seem to inherit "tk" attribute
I'm writing a Python application using tkinter GUI.
I created the TimestampWindow class which should be one of my Windows and made it extend the Toplevel class of tkinter's library and Window, a ...
- 401
2
votes
1
answer
136
views
Methods with same names in multiple inteheritance in C++ [duplicate]
I have a program
#include <iostream>
struct A {
virtual char f() = 0;
};
struct B {
virtual char f() = 0;
};
struct Derived : A, B {
public:
char A::f() override { return CA; }
...
- 154
3
votes
2
answers
100
views
Template resolution in method with a class template parameter is not working when using multiple inheritance in base class. Why? How?
Consider the following code:
template<typename T>
struct Ambiguous_C {
void func(T);
};
struct Ambiguous_F {
template<typename T>
void func(T);
};
struct Conflicted_F : ...
- 33
2
votes
0
answers
85
views
Ruby Inheritance Chain: Reusability [closed]
How would be possible to re-use a full inheritance chain by changing configuration parameters? (i.e. constants)
The base inheritance chain
So let's say we have this inheritance chain C < B < A
...
- 781
0
votes
1
answer
85
views
How to "collect" all items associated with a chain of superclasses?
Problem
Let's say I have a hierarchy of classes where each class has an associated list of class-specific items, e.g.
class Thing:
Items = ['Exist']
class Being(Thing):
Items = ['Live', 'Die']...
0
votes
2
answers
99
views
Inheriting a Class during Construction/Initialization in Python?
For a minimalist example, say I have three classes:
class A():
def method(self):
print('A')
self._method()
def _method(self):
pass
class B(A):
def _method(self):
...
- 121
1
vote
1
answer
78
views
How to fix inconsistent method resolution order when deriving from ctypes.Structure and Mapping
Given the following Python code:
import ctypes
from collections.abc import Mapping
class StructureMeta(type(ctypes.Structure), type(Mapping)):
pass
class Structure(ctypes.Structure, Mapping, ...
- 3,397
0
votes
3
answers
112
views
Python initialization with multiple inheritance
I have the following class hierarchy. The goal is for the calling code to choose either a base Foo object or a Foobar object that also provides the additional Bar functionality.
class Foo:
def ...
- 645