Variadic templates and switch statement?

Question

I have the following function which can take N arguments of different types, and forwards them to N functions templated on each individual type, in this manner (example with

Answer 1

Just for fun, I propose the following way

template 
bool func (int & cnt, Ts ... xs)
 {
   using unused = int[];

   int  i   { -1 };
   bool ret { true };

   (void)unused { 0, ((++i == cnt ? (ret = func(xs)) : true), 0)... };

   if ( ret && (cnt <= i) )
      ++cnt;

   return ret;
 }

but I don't think is a efficient way as the switch way.