How to find out the size of each element of the variable templates separately?

Question

C++ / C#

The variables float a, float a 2, MyClass a3, bool a4 were passed to the function instead of the parameter package. How can I find out the size of each of these variables in the function itself?

Answer 1

C++17 is required, for C++11 this is possible through template recursion. If necessary, I will explain how to do it.

template<typename ...Arg>
auto foo(){


    std::vector<unsigned int> _sizeofs;// массив с размерами каждого элемента
    ((_sizeofs.push_back(sizeof(Arg))),...);



}