zone/OpenAssetTools
2
0
Fork 0
mirror of https://github.com/Laupetin/OpenAssetTools.git synced 2025-10-25 07:45:52 +00:00
Code Activity

chore: change std optional json serialization to not include property if unset

Browse Source
This commit is contained in:
Jan
2024-04-01 14:58:57 +02:00
parent f8c9e62624
commit a2d649ed66
5 changed files with 122 additions and 100 deletions
Download Patch File Download Diff File Expand all files Collapse all files

58
src/ObjCommon/Json/JsonExtension.h Normal file
View File

@@ -0,0 +1,58 @@
#pragma once
// Credits to
// https://www.kdab.com/jsonify-with-nlohmann-json/
#include <nlohmann/json.hpp>
#include <optional>
// partial specialization (full specialization works too)
namespace nlohmann
{
template<class T> void optional_to_json(nlohmann::json& j, const char* name, const std::optional<T>& value)
{
if (value)
j[name] = *value;
}
template<class T> void optional_from_json(const nlohmann::json& j, const char* name, std::optional<T>& value)
{
const auto it = j.find(name);
if (it != j.end())
value = it->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>)
nlohmann::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)
{
if constexpr (is_optional<T>)
nlohmann::optional_from_json(j, key, value);
else
j.at(key).get_to(value);
}
} // namespace nlohmann
#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_DEFINE_TYPE_EXTENSION(Type, ...) \
inline void to_json(nlohmann::json& nlohmann_json_j, const Type& nlohmann_json_t) \
{ \
NLOHMANN_JSON_EXPAND(NLOHMANN_JSON_PASTE(EXTEND_JSON_TO, __VA_ARGS__)) \
} \
inline void from_json(const nlohmann::json& nlohmann_json_j, Type& nlohmann_json_t) \
{ \
NLOHMANN_JSON_EXPAND(NLOHMANN_JSON_PASTE(EXTEND_JSON_FROM, __VA_ARGS__)) \
}