Why does D not have generics?

[Guillaume Piolat]

On Tuesday, 12 January 2021 at 14:45:36 UTC, Adam D. Ruppe wrote:
>
> The benefit of this is you have almost zero compile time cost 
> and runtime cost comparable to any other class. It avoids 
> template bloat in codegen that can be very significant in D.
>
> I'd love to have it as an option in D as well. There's a lot of 
> types that can use identical runtime code and just change 
> types. Not just classes, but like integer types too can be 
> identical and merged, const/immutable/shared/etc can be 
> identical and merged, and even other things with cast(void*) 
> can do it.
>

A practice I've heard from game industry people was to 
instantiate template with void* to avoid duplicate template 
instantiation, and then cast at boundaries. Typically for 
containers.