Why does D not have generics?

[Paulo Pinto]

On Friday, 15 January 2021 at 11:58:13 UTC, Ola Fosheim Grøstad 
wrote:
> On Wednesday, 13 January 2021 at 08:33:58 UTC, Guillaume Piolat 
> wrote:
>> [...]
>
> Yes, that is what I suggested also. I implemented it yesterday 
> for deque, stack, etc, all using the same memory layout for 64 
> bit values (pointers, ints, doubles etc).
>
> What makes it cool is that you can construct datastructures 
> that use the same ranges code, despite having different types.
>
> However, it cannot be done without very negative effects on 
> precise collection, I think. So it is a bad fit for D, since it 
> is GC based, and precise collection is the future...
>
> So, trashed it. (I translated it to C++ instead... :-P)

If it is instantiated T = void* then it would only be safe to use 
with pointers anyway, thus using T = object would be an option.