passing __FILE__, __MODULE__, etc... with varadic types

[Jonathan M Davis]

On Friday, July 19, 2013 11:06:26 JS wrote:
> I would like to pass to all my templates the file and module
> locations where they are used(this goes into a debugging system I
> have come up with).
> 
> The problem is, with varadic types being passed I can't do this:
> 
> template T!(T..., string file = __FILE__)
> 
> doesn't work.
> 
> I think there is no way around except to explicitly pass
> __FILE__... which would be a mess?

As long as you're using a templated function and thus can use IFTI (implicit 
function template instantation) instead of giving the template arguments 
explicitly, you don't have to put the template parameters with default 
arguments last. You'd just have to put it after the variadic parameter if you 
intended to give the template arguments explicitly. So, as long as you don't 
have to give the template arguments explicitly, you're fine. If you need to 
give them explicitly though, I think that you're stuck.

- Jonathan M Davis