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 "elementtype.hpp"
#include <vector>
#include <iostream>
#include <typeinfo>
template<typename T>
void printElementType (T const& c)
{
std::cout << "Container of "
<< typeid(typename ElementT<T>::Type).name()
<< " elements.\n";
}
int main()
{
std::vector<bool> s;
printElementType(s);
int arr[42];
printElementType(arr);
}