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>
#include <string>
#include "stackauto.hpp"
int main()
{
Stack<int,20u> int20Stack; // stack of up to 20 ints
Stack<std::string,40> stringStack; // stack of up to 40 strings
// manipulate stack of up to 20 ints
int20Stack.push(7);
std::cout << int20Stack.top() << '\n';
auto size1 = int20Stack.size();
// manipulate stack of up to 40 strings
stringStack.push("hello");
std::cout << stringStack.top() << '\n';
auto size2 = stringStack.size();
if (!std::is_same_v<decltype(size1), decltype(size2)>) {
std::cout << "size types differ" << '\n';
}
}