Vararg-templated class with matching member func

[Nick Sabalausky]

On Sun, 07 Apr 2013 01:53:34 +0200
"bearophile" <bearophileHUGS at lycos.com> wrote:

> 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...
> 

Actually, the missing parens around new were just part of my example,
not in my original code.

The "void func(TArgs args) {}" is something I had tried, but apparently
my real problem was something else:

class Foo(TArgs...) {
     void func(TArgs args) { func2(args); }
     void func2()(TArgs args) {}
}

void main() {
     (new Foo!(int)).func(5);
}

That fails. If func2 is *not* a template then it works. Looks like I
stumbled on a compiler bug. And idea offhand whether it's a known one?
I'm going to go ahead and file it, feel free to close if you know
it's a duplicate (I didn't see anything like it though):

http://d.puremagic.com/issues/show_bug.cgi?id=9894