The year is 2019

[XavierAP]

On Saturday, 27 July 2019 at 08:32:07 UTC, Mike Franklin wrote:
>
> but what I'm proposing is NOT multiple inheritance.  It is 
> simply struct composition as it should be.

Ah well I was referring to simple plain old inheritance, so it'd 
be a separate topic/DIP. My question was whether a DIP about 
simple struct inheritance, and I interpreted Manu's past thread 
as requesting this (possibly among or together with other 
features); but I had misunderstood at least the former.

> We keep espousing "prefer composition over inheritance" but

I see the point in that statement, but I don't subscribe 100%. 
There's a pitfall in inheritance when you make too complex 
hierarchies, that are too inflexible to redesign. In this case if 
you had implemented the same from composition (e.g. 
entity-component-system architecture) it would be more 
flexible/better.

But those cases don't mean imo that inheritance is anathema or 
never useful. Every feature can be abused (even templates, or 
metaprogramming ;)

> I think D can be the first language to finally do composition 
> right with this feature.

Sounds interesting.