How to properly use references with variadic templates

Question

I have something like the following code:

   template
   void inc(T1& t1, T2& t2, T3& t3, T         


        

Answer 1

I would not use rvalue references here, because that will allow you to bind to rvalues which can allow such nonsensical code as:

inc(1);

So, I would stick with regular references:

template
void inc(T& t) { ++t; }

template
void inc(T& t, Args& ... args) { ++t; inc(args...); }