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* 🚚 move files * 🚚 rename doc folder to docs * 🚚 rename test folder to tests
53 lines
1.3 KiB
C++
53 lines
1.3 KiB
C++
#include <iostream>
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#include <nlohmann/json.hpp>
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using json = nlohmann::json;
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namespace ns
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{
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struct person
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{
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std::string name;
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std::string address;
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int age;
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};
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void to_json(nlohmann::json& nlohmann_json_j, const person& nlohmann_json_t)
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{
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nlohmann_json_j["name"] = nlohmann_json_t.name;
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nlohmann_json_j["address"] = nlohmann_json_t.address;
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nlohmann_json_j["age"] = nlohmann_json_t.age;
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}
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void from_json(const nlohmann::json& nlohmann_json_j, person& nlohmann_json_t)
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{
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nlohmann_json_t.name = nlohmann_json_j.at("name");
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nlohmann_json_t.address = nlohmann_json_j.at("address");
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nlohmann_json_t.age = nlohmann_json_j.at("age");
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}
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} // namespace ns
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int main()
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{
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ns::person p = {"Ned Flanders", "744 Evergreen Terrace", 60};
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// serialization: person -> json
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json j = p;
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std::cout << "serialization: " << j << std::endl;
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// deserialization: json -> person
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json j2 = R"({"address": "742 Evergreen Terrace", "age": 40, "name": "Homer Simpson"})"_json;
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auto p2 = j2.get<ns::person>();
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// incomplete deserialization:
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json j3 = R"({"address": "742 Evergreen Terrace", "name": "Maggie Simpson"})"_json;
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try
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{
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auto p3 = j3.get<ns::person>();
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}
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catch (json::exception& e)
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{
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std::cout << "deserialization failed: " << e.what() << std::endl;
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}
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}
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