article comparing Rust and Zig, many points relevant to D

[mw]

On Wednesday, 10 March 2021 at 18:08:24 UTC, H. S. Teoh wrote:
> On Wed, Mar 10, 2021 at 05:59:56PM +0000, VF via Digitalmars-d 
> wrote: [...]
>> Speaking of bugginess, here's the latest bug that I noticed 
>> (dmd 2.094):
>> 
>> mixin template X() { int x; }
>> 
>> struct A { mixin X; int x; } // <- that compiles!
>
> This is not a bug. It's a feature. (Although its value is 
> debatable.) Mixins exist in separate namespaces, which can be 
> useful if you have multiple mixins that declare the same 
> identifier. Note that there's an optional identifier after 
> `mixin X` that can be used to disambiguate between the two 
> instances of `x`, e.g.:
>
> 	struct A {
> 		mixin X x2;
> 		int x;
> 	}
>
> 	A.x2.x = 1;
> 	a.x = 2;
>

If there is no optional identifier x2,

a.x = 2;

will change which x? and how to disambiguate the two x in such 
case?