json/doc/examples/dump.cpp

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#include <iostream>
#include <nlohmann/json.hpp>
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using json = nlohmann::json;
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int main()
{
// create JSON values
json j_object = {{"one", 1}, {"two", 2}};
json j_array = {1, 2, 4, 8, 16};
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json j_string = "Hellö 😀!";
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// call dump()
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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 = "\xF0\xA4\xAD\xC0";
try
{
std::cout << j_invalid.dump() << std::endl;
}
catch (json::type_error& e)
{
std::cout << e.what() << std::endl;
}
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}