anyone knows what is virtual path inheritance ?

i have seen this word in interview question .
i don't know if this kind of thing is existing or not. may be it is same as multiple path inheritance(diamond problem)!

Look here

Originally Posted by C_ntua

Look here

it is example of diamond problem.
are you saying that diamond problem is a virtual path inheritance or it is any inheritance in which class is inherited with virtual keyword?

I have never heard of the specific term "virtual path inheritance", but C_ntua seems to think that it is the same thing as virtual inheritance.

The "diamond of death" refers to a derived class having more than one instance of a base class through multiple inheritence, in circumstances where only one instance is wanted.

An example of the hierarchy is;

Code:

class Base
{
    // members
};

class A : public Base
{
    // members
};

class B : public Base
{
    // members
};

class Derived : public A, public B
{
    // members
}

Problems associated with the "diamond of death" are resolved by declaring the Base to be a virtual base of both A and B.

Doing this achieves what is sometimes described as "virtual path inheritence". Personally, I consider it a woeful description, but some people seem to like it.

Did anybody here actually ever encounter this problem? I've coded quite a lot in C++, all object oriented, but I've never created a diamond pattern...

Originally Posted by EVOEx

Did anybody here actually ever encounter this problem? I've coded quite a lot in C++, all object oriented, but I've never created a diamond pattern...

There is the rather famous example of std::basic_ios, std::basic_istream, std::basic_ostream and std::basic_iostream.