DIP66 - Multiple alias this

[IGotD-]

On Sunday, 27 September 2020 at 21:52:15 UTC, 12345swordy wrote:
>
> It been deprecated as Walter discovered that the current alias 
> this introduce the diamond problem. That and other sorts of 
> bugs that it has.
>
> -Alex

I must criticize the cop out that many language designers claim 
about the diamond problem. The diamond problem is mainly an 
academic problem which doesn't happen much in real life. I have 
programmed C++ for decades and I have only encountered the 
diamond problem once in my lifetime and this because I was 
hacking around, changed the solution shortly after so that it 
could do without "public virtual". You can come very far with 
multiple inheritance without the diamond pattern.

Are you saying that the detection of the diamond inheritance 
pattern is hard to implement, I would say that it isn't. If it 
detects, just emit a compiler error telling the user that such 
pattern isn't allowed.

The diamond problem is like a fantasy monster under the bed of 
the language designers.