Class allocation from tuple

[bearophile]

I have a tuple of classes (D1 language), I'd like to instantiate one of them 
directly with new, but it seems I can't:

template Tuple(T...) { alias T Tuple; }

class Foo { static void foo(){} }
class Bar {}
alias Tuple!(Foo, Bar) ClassTuple;

void main() {
    alias ClassTuple[0] Foo0;
    new Foo0; // OK

    ClassTuple[0].foo(); // OK

    new ClassTuple[0]; // Not OK
    new (ClassTuple[0]); // Not OK
}

Can you tell me what the problem is?

Thank you and bye,
bearophile