variadic function template without formal parameters

Question

This is what I\'m trying to do:

// base case
void f() {}

template 
void f() {
             


        

Answer 1

Since c++20 you can use constraints to functions, instead of SFINAE.

template 
requires (sizeof...(Ts) == 0)
void f(){}

template 
void f() {
    // do something with T
    f();
}