Checking type of parameter pack using enable_if

Question

Since there is a restriction on allowed non-type variadic templates, I am trying to write a function taking an arbitrary number of doubles using enable_if. In essen

Answer 1

I think the simpler would be to use std::initializer_list:

foo(std::initializer_list args)
{
    // Your stuff.
}

instead of variadic template. It may require to use {} instead of/ in addition to ()