ceph/src/jaegertracing/opentelemetry-cpp/third_party/nlohmann-json/doc/examples/type.cpp

   1 #include <iostream>
   2 #include <nlohmann/json.hpp>
   3
   4 using json = nlohmann::json;
   5
   6 int main()
   7 {
   8     // create JSON values
   9     json j_null;
  10     json j_boolean = true;
  11     json j_number_integer = -17;
  12     json j_number_unsigned = 42u;
  13     json j_number_float = 23.42;
  14     json j_object = {{"one", 1}, {"two", 2}};
  15     json j_array = {1, 2, 4, 8, 16};
  16     json j_string = "Hello, world";
  17
  18     // call type()
  19     std::cout << std::boolalpha;
  20     std::cout << (j_null.type() == json::value_t::null) << '\n';
  21     std::cout << (j_boolean.type() == json::value_t::boolean) << '\n';
  22     std::cout << (j_number_integer.type() == json::value_t::number_integer) << '\n';
  23     std::cout << (j_number_unsigned.type() == json::value_t::number_unsigned) << '\n';
  24     std::cout << (j_number_float.type() == json::value_t::number_float) << '\n';
  25     std::cout << (j_object.type() == json::value_t::object) << '\n';
  26     std::cout << (j_array.type() == json::value_t::array) << '\n';
  27     std::cout << (j_string.type() == json::value_t::string) << '\n';
  28 }