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 <initializer_list>
#include <string>
#include <iostream>
template<typename T>
struct Array {
Array(std::initializer_list<T>) {
std::cout << "#1\n";
}
Array(unsigned n, T const&) {
std::cout << "#2\n";
}
};
void arr1(Array<int>) {
}
void arr2(Array<std::string>) {
}
int main()
{
arr1({1, 2, 3, 4, 5}); // prints \#1
arr1({1, 2}); // prints \#1
arr1({10u, 5}); // prints \#1
arr2({"hello", "initializer", "list"}); // prints \#1
arr2({10, "hello"}); // prints \#2
}