Need help understanding Tuple

[bearophile]

d coder:

> template Tuple(T...) {
>   alias T Tuple;
> }
>
> enum Bar;
> class Foo {
>   @Bar int a;
> }
>
> void main()
> {
>   Foo foo = new Foo;
>   alias Tuple!(__traits(getAttributes, foo.a)) tp;
>   pragma(msg, tp);
> }

As first step, don't use that Tuple, use std.typetuple.TypeTuple 
instead. It's the same, but using the standardized name helps 
readability.

Bye,
bearophile