--- /dev/null
+#include <iostream>
+#include <nlohmann/json.hpp>
+
+using json = nlohmann::json;
+
+int main()
+{
+ // create JSON values
+ json j_boolean = true;
+ json j_number_integer = 17;
+ json j_number_float = 23.42;
+ json j_object = {{"one", 1}, {"two", 2}};
+ json j_object_empty(json::value_t::object);
+ json j_array = {1, 2, 4, 8, 16};
+ json j_array_empty(json::value_t::array);
+ json j_string = "Hello, world";
+
+ // call back()
+ std::cout << j_boolean.back() << '\n';
+ std::cout << j_number_integer.back() << '\n';
+ std::cout << j_number_float.back() << '\n';
+ std::cout << j_object.back() << '\n';
+ //std::cout << j_object_empty.back() << '\n'; // undefined behavior
+ std::cout << j_array.back() << '\n';
+ //std::cout << j_array_empty.back() << '\n'; // undefined behavior
+ std::cout << j_string.back() << '\n';
+
+ // back() called on a null value
+ try
+ {
+ json j_null;
+ j_null.back();
+ }
+ catch (json::invalid_iterator& e)
+ {
+ std::cout << e.what() << '\n';
+ }
+}