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

   1 #include <iostream>
   2 #include <iomanip>
   3 #include <nlohmann/json.hpp>
   4
   5 using json = nlohmann::json;
   6
   7 int main()
   8 {
   9     std::cout << "hash(null) = " << std::hash<json> {}(json(nullptr)) << '\n'
  10               << "hash(false) = " << std::hash<json> {}(json(false)) << '\n'
  11               << "hash(0) = " << std::hash<json> {}(json(0)) << '\n'
  12               << "hash(0U) = " << std::hash<json> {}(json(0U)) << '\n'
  13               << "hash(\"\") = " << std::hash<json> {}(json("")) << '\n'
  14               << "hash({}) = " << std::hash<json> {}(json::object()) << '\n'
  15               << "hash([]) = " << std::hash<json> {}(json::array()) << '\n'
  16               << "hash({\"hello\": \"world\"}) = " << std::hash<json> {}("{\"hello\": \"world\"}"_json)
  17               << std::endl;
  18 }