Challenge: write a reference counted slice that works as much as possible like a built-in slice

[zjh]

On Saturday, 13 November 2021 at 02:53:12 UTC, zjh wrote:
> On Saturday, 13 November 2021 at 01:12:32 UTC, H. S. Teoh wrote:

> Everybody's gone.

`Although` `D`'s Metaprogramming is beautiful, with a 'GC',I'd 
rather use a macro language.
Why there is no `GC` in the new language? Doesn't everyone see 
that `d` is biten by the `GC`?