adl_serializer.hpp 2.0 KB

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  1. #pragma once
  2. #include <type_traits>
  3. #include <utility>
  4. #include <nlohmann/detail/conversions/from_json.hpp>
  5. #include <nlohmann/detail/conversions/to_json.hpp>
  6. #include <nlohmann/detail/meta/identity_tag.hpp>
  7. #include <nlohmann/detail/meta/type_traits.hpp>
  8. namespace nlohmann
  9. {
  10. /// @sa https://json.nlohmann.me/api/adl_serializer/
  11. template<typename ValueType, typename>
  12. struct adl_serializer
  13. {
  14. /// @brief convert a JSON value to any value type
  15. /// @sa https://json.nlohmann.me/api/adl_serializer/from_json/
  16. template<typename BasicJsonType, typename TargetType = ValueType>
  17. static auto from_json(BasicJsonType && j, TargetType& val) noexcept(
  18. noexcept(::nlohmann::from_json(std::forward<BasicJsonType>(j), val)))
  19. -> decltype(::nlohmann::from_json(std::forward<BasicJsonType>(j), val), void())
  20. {
  21. ::nlohmann::from_json(std::forward<BasicJsonType>(j), val);
  22. }
  23. /// @brief convert a JSON value to any value type
  24. /// @sa https://json.nlohmann.me/api/adl_serializer/from_json/
  25. template<typename BasicJsonType, typename TargetType = ValueType>
  26. static auto from_json(BasicJsonType && j) noexcept(
  27. noexcept(::nlohmann::from_json(std::forward<BasicJsonType>(j), detail::identity_tag<TargetType> {})))
  28. -> decltype(::nlohmann::from_json(std::forward<BasicJsonType>(j), detail::identity_tag<TargetType> {}))
  29. {
  30. return ::nlohmann::from_json(std::forward<BasicJsonType>(j), detail::identity_tag<TargetType> {});
  31. }
  32. /// @brief convert any value type to a JSON value
  33. /// @sa https://json.nlohmann.me/api/adl_serializer/to_json/
  34. template<typename BasicJsonType, typename TargetType = ValueType>
  35. static auto to_json(BasicJsonType& j, TargetType && val) noexcept(
  36. noexcept(::nlohmann::to_json(j, std::forward<TargetType>(val))))
  37. -> decltype(::nlohmann::to_json(j, std::forward<TargetType>(val)), void())
  38. {
  39. ::nlohmann::to_json(j, std::forward<TargetType>(val));
  40. }
  41. };
  42. } // namespace nlohmann