1 #include <iostream> 2 #include <nlohmann/json.hpp> 3 4 using json = nlohmann::json; 5 main()6int main() 7 { 8 // an invalid JSON text 9 std::string text = R"( 10 { 11 "key": "value without closing quotes 12 } 13 )"; 14 15 // parse with exceptions 16 try 17 { 18 json j = json::parse(text); 19 } 20 catch (json::parse_error& e) 21 { 22 std::cout << e.what() << std::endl; 23 } 24 25 // parse without exceptions 26 json j = json::parse(text, nullptr, false); 27 28 if (j.is_discarded()) 29 { 30 std::cout << "the input is invalid JSON" << std::endl; 31 } 32 else 33 { 34 std::cout << "the input is valid JSON: " << j << std::endl; 35 } 36 } 37