| #include <iostream> |
| #include <nlohmann/json.hpp> |
| |
| using json = nlohmann::json; |
| |
| int main() |
| { |
| // create JSON values |
| json j_null; |
| json j_boolean = true; |
| json j_number_integer = -17; |
| json j_number_unsigned = 42u; |
| json j_number_float = 23.42; |
| json j_object = {{"one", 1}, {"two", 2}}; |
| json j_array = {1, 2, 4, 8, 16}; |
| json j_string = "Hello, world"; |
| |
| // call type() |
| std::cout << std::boolalpha; |
| std::cout << (j_null.type() == json::value_t::null) << '\n'; |
| std::cout << (j_boolean.type() == json::value_t::boolean) << '\n'; |
| std::cout << (j_number_integer.type() == json::value_t::number_integer) << '\n'; |
| std::cout << (j_number_unsigned.type() == json::value_t::number_unsigned) << '\n'; |
| std::cout << (j_number_float.type() == json::value_t::number_float) << '\n'; |
| std::cout << (j_object.type() == json::value_t::object) << '\n'; |
| std::cout << (j_array.type() == json::value_t::array) << '\n'; |
| std::cout << (j_string.type() == json::value_t::string) << '\n'; |
| } |