Some compile time help..

[simendsjo]

Hi.
I have the following code:
void f(Args...)(Args args) {
   needs_wchar_t(args);
}

I want to loop over Args, and if it's a string of some type, I want to run  
it through toUTFz. For all other values, I just want to push them as  
normal.
How could I solve this?