Vararg-templated class with matching member func

[bearophile]

Nick Sabalausky:

> I have a feeling I'm missing something obvious, but how do I 
> create
> something like this?:
>
> class Foo(TArgs...)
> {
>     void func(/+ args must exactly match TArgs +/)
>     {
>     }
> }
>
> new Foo(int).func(5); // Ok
> new Foo(int, string).func(5, "hello"); // Ok
>
> // Error! Overload not found!
> new Foo(int).func(5, 8);
> new Foo(int).func("hellO");
>
> // Error! Overload not found!
> new Foo(int, string).func(5);
> new Foo(int, string).func("hello");
>
> Maybe it's just a slow-brain day, but I'm having trouble 
> working out
> the right syntax for that.

Do you mean something like this?



class Foo(TArgs...) {
     void func(TArgs args) {}
}

void main() {
     (new Foo!(int)).func(5); // Ok
     (new Foo!(int, string)).func(5, "hello"); // Ok

     // Error! Overload not found!
     (new Foo!(int)).func(5, 8);
     (new Foo!(int)).func("hellO");

     // Error! Overload not found!
     (new Foo!(int, string)).func(5);
     (new Foo!(int, string)).func("hello");
}


The extra () around the new is something that we are asking to be 
not required. But Walter for unknown reasons seems to not like 
the idea...

Bye,
bearophile