Why is !() need with default template arguments

[Lars T. Kyllingstad]

Jeremie Pelletier wrote:
> Jacob Carlborg Wrote:
> 
>> If I have a class like this:
>>
>> class Class (T = int) {}
>>
>> Then why can't I use it like this:
>>
>> auto c = new C;
>>
>> I have to do this:
>>
>> auto c = new C!();
> 
> I think it is so the parser knows how to make the difference between the template symbol and an instance symbol.
> 

Can you do anything with a template except instantiate it?

-Lars