deploy: cba5dc0ed8

examples/nlohmann_define_type_non_intrusive_with_names_explicit.cpp

@@ -0,0 +1,55 @@
+#include <iostream>
+#include <nlohmann/json.hpp>
+
+using json = nlohmann::json;
+using namespace nlohmann::literals;
+
+namespace ns
+{
+struct person
+{
+    std::string name;
+    std::string address;
+    int age;
+};
+
+template <typename BasicJsonType, nlohmann::detail::enable_if_t<nlohmann::detail::is_basic_json<BasicJsonType>::value, int> = 0>
+void to_json(BasicJsonType& nlohmann_json_j, const person& nlohmann_json_t)
+{
+    nlohmann_json_j["json_name"] = nlohmann_json_t.name;
+    nlohmann_json_j["json_address"] = nlohmann_json_t.address;
+    nlohmann_json_j["json_age"] = nlohmann_json_t.age;
+}
+
+template <typename BasicJsonType, nlohmann::detail::enable_if_t<nlohmann::detail::is_basic_json<BasicJsonType>::value, int> = 0>
+void from_json(const BasicJsonType& nlohmann_json_j, person& nlohmann_json_t)
+{
+    nlohmann_json_j.at("json_name").get_to(nlohmann_json_t.name);
+    nlohmann_json_j.at("json_address").get_to(nlohmann_json_t.address);
+    nlohmann_json_j.at("json_age").get_to(nlohmann_json_t.age);
+}
+} // namespace ns
+
+int main()
+{
+    ns::person p = {"Ned Flanders", "744 Evergreen Terrace", 60};
+
+    // serialization: person -> json
+    json j = p;
+    std::cout << "serialization: " << j << std::endl;
+
+    // deserialization: json -> person
+    json j2 = R"({"json_address": "742 Evergreen Terrace", "json_age": 40, "json_name": "Homer Simpson"})"_json;
+    auto p2 = j2.template get<ns::person>();
+
+    // incomplete deserialization:
+    json j3 = R"({"json_address": "742 Evergreen Terrace", "json_name": "Maggie Simpson"})"_json;
+    try
+    {
+        auto p3 = j3.template get<ns::person>();
+    }
+    catch (const json::exception& e)
+    {
+        std::cout << "deserialization failed: " << e.what() << std::endl;
+    }
+}

examples/nlohmann_define_type_non_intrusive_with_names_explicit.output

@@ -0,0 +1,2 @@
+serialization: {"json_address":"744 Evergreen Terrace","json_age":60,"json_name":"Ned Flanders"}
+deserialization failed: [json.exception.out_of_range.403] key 'json_age' not found

examples/nlohmann_define_type_non_intrusive_with_names_macro.cpp

@@ -0,0 +1,41 @@
+#include <iostream>
+#include <nlohmann/json.hpp>
+
+using json = nlohmann::json;
+using namespace nlohmann::literals;
+
+namespace ns
+{
+struct person
+{
+    std::string name;
+    std::string address;
+    int age;
+};
+
+NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE_WITH_NAMES(person, "json_name", name, "json_address", address, "json_age", age)
+} // namespace ns
+
+int main()
+{
+    ns::person p = {"Ned Flanders", "744 Evergreen Terrace", 60};
+
+    // serialization: person -> json
+    json j = p;
+    std::cout << "serialization: " << j << std::endl;
+
+    // deserialization: json -> person
+    json j2 = R"({"json_address": "742 Evergreen Terrace", "json_age": 40, "json_name": "Homer Simpson"})"_json;
+    auto p2 = j2.template get<ns::person>();
+
+    // incomplete deserialization:
+    json j3 = R"({"json_address": "742 Evergreen Terrace", "json_name": "Maggie Simpson"})"_json;
+    try
+    {
+        auto p3 = j3.template get<ns::person>();
+    }
+    catch (const json::exception& e)
+    {
+        std::cout << "deserialization failed: " << e.what() << std::endl;
+    }
+}

examples/nlohmann_define_type_non_intrusive_with_names_macro.output

@@ -0,0 +1,2 @@
+serialization: {"json_address":"744 Evergreen Terrace","json_age":60,"json_name":"Ned Flanders"}
+deserialization failed: [json.exception.out_of_range.403] key 'json_age' not found