Mixin template overloads not working

[Rumbu]

On Friday, 3 December 2021 at 10:57:34 UTC, Stanislav Blinov 
wrote:
> On Friday, 3 December 2021 at 10:42:37 UTC, Rumbu wrote:
>
>> Bug or feature? Is there any workaround?
>
> The error message explains what to do :)
>
>> Error: class `mixinover.AnotherVisitor` use of 
>> `mixinover.Visitor.visit(S s)` is hidden by `AnotherVisitor`; 
>> use `alias visit = Visitor.visit;` to introduce base class 
>> overload set

Yes, I know, but in fact the compiler wrongly assumes that 
visit(A) is hiding visit(S). visit(A) is just an overload, it has 
a different signature than visit(S), theoretically the compiler 
must mangle it using a different name.

Finally I solved it by "finalizing" visit(S), so it's not taken 
into overrides set.

```d
class Visitor
{    
      final void visit(S s) {}
      //...
}