1 #include <iostream> 2 #include <nlohmann/json.hpp> 3 4 using json = nlohmann::json; 5 6 namespace ns 7 { 8 // a simple struct to model a person 9 struct person 10 { 11 std::string name; 12 std::string address; 13 int age; 14 }; 15 } // namespace ns 16 17 namespace ns 18 { to_json(json & j,const person & p)19void to_json(json& j, const person& p) 20 { 21 j = json{ {"name", p.name}, {"address", p.address}, {"age", p.age} }; 22 } 23 } // namespace ns 24 main()25int main() 26 { 27 ns::person p = {"Ned Flanders", "744 Evergreen Terrace", 60}; 28 29 json j = p; 30 31 std::cout << j << std::endl; 32 } 33