#include <iostream>

#include <string_view>

#include <nlohmann/json.hpp>

using namespace std::string_view_literals;

using json = nlohmann::json;

int main()

{

// create JSON object

json object =

{

{"the good", "il buono"},

{"the bad", "il cattivo"},

{"the ugly", "il brutto"}

};

// output element with key "the ugly" using string_view

std::cout << object.at("the ugly"sv) << '\n';

// change element with key "the bad" using string_view

object.at("the bad"sv) = "il cattivo";

// output changed array

std::cout << object << '\n';

// exception type_error.304

try

{

// use at() with string_view on a non-object type

json str = "I am a string";

str.at("the good"sv) = "Another string";

}

catch (const json::type_error& e)

{

std::cout << e.what() << '\n';

}

// exception out_of_range.401

try

{

// try to write at a nonexisting key using string_view

object.at("the fast"sv) = "il rapido";

}

catch (const json::out_of_range& e)

{

std::cout << e.what() << '\n';

}

}