could anyone please direct me to a discussion about dropping multiple
inheritance?
I'm sure this has been on the forum in the past but I can't find a search
function.

I consider multiple and virtual inheritance an important feature. dropping it means dropping a part of type safety, among other things.

thank you,
Stefan

Stefan wrote:

> could anyone please direct me to a discussion about dropping multiple
> inheritance?
> I'm sure this has been on the forum in the past but I can't find a search
> function.

You could try Thunderbird, which has an excellent news search function ?

http://www.mozilla.org/products/thunderbird/

> I consider multiple and virtual inheritance an important feature. dropping it
> means dropping a part of type safety, among other things.

D now has a single-rooted Object hierarchy, and the mixin feature.
Along with interfaces, that should cover *most* cases of using MI ?


http://www.digitalmars.com/d/overview.html says:

> Features To Drop

> Multiple inheritance. It's a complex feature of debatable value.
> It's very difficult to implement in an efficient manner, and compilers
> are prone to many bugs in implementing it. Nearly all the value of MI can
> be handled with single inheritance coupled with interfaces and aggregation.
> What's left does not justify the weight of MI implementation.

So I don't think that it will be in D, any more than it is in Java ?


Just as with the C++ references (&), there are a few cases left.
But they haven't been deemed important to change the language...

--anders

In article <csigv7$l8v$1@digitaldaemon.com>, Stefan says...
>
>could anyone please direct me to a discussion about dropping multiple
>inheritance?
>I'm sure this has been on the forum in the past but I can't find a search
>function.

Try this: http://www.digitalmars.com/advancedsearch.html

Also, Wiki4D is searchable: http://www.prowiki.org/wiki4d/wiki.cgi?Search


>I consider multiple and virtual inheritance an important feature. dropping it means dropping a part of type safety, among other things.

It's not so much that multiple inheritence has been dropped from D. It's more that it was never added. ;)

Here's a short explanation why D doesn't have MI: http://www.digitalmars.com/drn-bin/wwwnews?D/67

And here's some code that shows how the lack of MI might be worked-around: http://www.digitalmars.com/drn-bin/wwwnews?D/25856

I'm sure there's a lot more discussion about MI out there, but I'll leave for you to find it if you really want to beat that old dead horse. :)

>thank you,
>Stefan

jcc7