json/docs/examples/dump.cpp
2023-09-23 17:19:50 +02:00

49 lines
1.4 KiB
C++

#include <iostream>
#include <nlohmann/json.hpp>
using json = nlohmann::json;
int main()
{
// create JSON values
json j_object = {{"one", 1}, {"two", 2}};
json j_array = {1, 2, 4, 8, 16};
json j_string = "Hellö 😀!";
// call dump()
std::cout << "objects:" << '\n'
<< j_object.dump() << "\n\n"
<< j_object.dump(-1) << "\n\n"
<< j_object.dump(0) << "\n\n"
<< j_object.dump(4) << "\n\n"
<< j_object.dump(1, '\t') << "\n\n";
std::cout << "arrays:" << '\n'
<< j_array.dump() << "\n\n"
<< j_array.dump(-1) << "\n\n"
<< j_array.dump(0) << "\n\n"
<< j_array.dump(4) << "\n\n"
<< j_array.dump(1, '\t') << "\n\n";
std::cout << "strings:" << '\n'
<< j_string.dump() << '\n'
<< j_string.dump(-1, ' ', true) << '\n';
// create JSON value with invalid UTF-8 byte sequence
json j_invalid = "ä\xA9ü";
try
{
std::cout << j_invalid.dump() << std::endl;
}
catch (const json::type_error& e)
{
std::cout << e.what() << std::endl;
}
std::cout << "string with replaced invalid characters: "
<< j_invalid.dump(-1, ' ', false, json::error_handler_t::replace)
<< "\nstring with ignored invalid characters: "
<< j_invalid.dump(-1, ' ', false, json::error_handler_t::ignore)
<< '\n';
}