Member function template with the number of parameters depending on an integral template parameter

Question

I have the following class template:

template
class MyClass;

where T is some type, N - num

Answer 1

May be, based on your 3rd variant, you can extract first argument from initializer list and deduce type by it

template::type = 0>
void foo(U u, T2... args)
{
    MyClass({u, args...});
}