The following code example is taken from the book
C++ Templates - The Complete Guide, 2nd Edition
by David Vandevoorde, Nicolai M. Josuttis, and Douglas Gregor,
Addison-Wesley, 2017
© Copyright David Vandevoorde, Nicolai M. Josuttis, Douglas Gregor 2017
#include <iostream>
class EmptyClass {
};
int main()
{
std::cout << "sizeof(EmptyClass): " << sizeof(EmptyClass) << '\n';
}