76 lines
2.3 KiB
C++
76 lines
2.3 KiB
C++
//
|
|
// Created by selim on 06.11.22.
|
|
//
|
|
|
|
#ifndef AUTOCAT_GNOME_JSONOPTIONAL_H
|
|
#define AUTOCAT_GNOME_JSONOPTIONAL_H
|
|
|
|
#include <nlohmann/json.hpp>
|
|
#include <iostream>
|
|
|
|
namespace nlohmann {
|
|
|
|
template<class J, class T>
|
|
void optional_to_json(J& j, const char* name, const std::optional<T>& value)
|
|
{
|
|
if (value)
|
|
{
|
|
j[name] = *value;
|
|
}
|
|
}
|
|
|
|
template<class J, class T>
|
|
void optional_from_json(const J& j, const char* name, std::optional<T>& value)
|
|
{
|
|
const auto it = j.find(name);
|
|
if (it != j.end())
|
|
{
|
|
if(j.at(name).is_null()) {
|
|
value = std::nullopt;
|
|
} else {
|
|
value = it->template get<T>();
|
|
}
|
|
}
|
|
else
|
|
{
|
|
value = std::nullopt;
|
|
}
|
|
}
|
|
|
|
template <typename>
|
|
constexpr bool is_optional = false;
|
|
template <typename T>
|
|
constexpr bool is_optional<std::optional<T>> = true;
|
|
|
|
template <typename T>
|
|
void extended_to_json(const char *key, nlohmann::json &j, const T &value) {
|
|
if constexpr (is_optional<T>)
|
|
optional_to_json(j, key, value);
|
|
else
|
|
j[key] = value;
|
|
}
|
|
template <typename T>
|
|
void extended_from_json(const char *key, const nlohmann::json &j, T &value) {
|
|
//std::cout << "parsing key " << key << std::endl;
|
|
if constexpr (is_optional<T>) {
|
|
optional_from_json(j, key, value);
|
|
} else {
|
|
j.at(key).get_to(value);
|
|
}
|
|
}
|
|
|
|
#define EXTEND_JSON_TO(v1) extended_to_json(#v1, nlohmann_json_j, nlohmann_json_t.v1);
|
|
#define EXTEND_JSON_FROM(v1) extended_from_json(#v1, nlohmann_json_j, nlohmann_json_t.v1);
|
|
|
|
#define NLOHMANN_JSONIFY_ALL_THINGS(Type, ...) \
|
|
friend void to_json(nlohmann::json &nlohmann_json_j, const Type &nlohmann_json_t) { \
|
|
NLOHMANN_JSON_EXPAND(NLOHMANN_JSON_PASTE(EXTEND_JSON_TO, __VA_ARGS__)) \
|
|
} \
|
|
friend void from_json(const nlohmann::json &nlohmann_json_j, Type &nlohmann_json_t) { \
|
|
NLOHMANN_JSON_EXPAND(NLOHMANN_JSON_PASTE(EXTEND_JSON_FROM, __VA_ARGS__)) \
|
|
}
|
|
|
|
}
|
|
|
|
#endif //AUTOCAT_GNOME_JSONOPTIONAL_H
|