Re: oop inheritance graph

From:

Pete Becker <pete@versatilecoding.com>

Newsgroups:

comp.lang.c++

Date:

Mon, 25 Jun 2007 07:36:21 -0400

Message-ID:

<tLednbmYL-MrNeLbnZ2dnUVZ_hGdnZ2d@giganews.com>

aaragon wrote:

On Jun 24, 11:25 pm, "a" <a...@mail.com> wrote:

Hi,
I have an oop inheritance graph problem.
What is the difference betweent the following 2 inheritance graph?
How does the C++ solve the naming conflict problem for multiple inheritance
problem?

Thanks

  A
/ \
B C
\ /
  D

A A
| |
B C
  \ /
  D

There is no difference between the two graphs that you draw since both
B and C inherit from A in both graphs. You have to use "virtual
inheritance" for class A. Scott Meyers discusses this point in detail
in his book Effective C++ (item 43). You may want to avoid this kind
of inheritance graph. The naming convention is defined by the closest
definition of a function to D. For example, if A defines foo() and
this is redefined in C, D uses the C version of foo(). Hope it helps.

No, you don't "have to" use virtual inheritance. That's the difference
between them: the top one uses it and the bottom one doesn't.

--

-- Pete
Roundhouse Consulting, Ltd. (www.versatilecoding.com)
Author of "The Standard C++ Library Extensions: a Tutorial and
Reference." (www.petebecker.com/tr1book)