draconisplusplus/include/rfl/parsing/Parser_skip.hpp

#ifndef RFL_PARSING_PARSER_SKIP_HPP_
#define RFL_PARSING_PARSER_SKIP_HPP_

#include <map>
#include <type_traits>

#include "../Result.hpp"
#include "../always_false.hpp"
#include "../internal/Skip.hpp"
#include "Parser_base.hpp"
#include "schema/Type.hpp"

namespace rfl {
  namespace parsing {

    template <
        class R,
        class W,
        class T,
        bool _skip_serialization,
        bool _skip_deserialization,
        class ProcessorsType>
      requires AreReaderAndWriter<
          R,
          W,
          internal::Skip<T, _skip_serialization, _skip_deserialization>>
    struct Parser<
        R,
        W,
        internal::Skip<T, _skip_serialization, _skip_deserialization>,
        ProcessorsType> {
      using InputVarType  = typename R::InputVarType;
      using OutputVarType = typename W::OutputVarType;

      static Result<
          internal::Skip<T, _skip_serialization, _skip_deserialization>>
      read(const R& _r, const InputVarType& _var) noexcept {
        if constexpr (_skip_deserialization) {
          return internal::Skip<T, _skip_serialization, _skip_deserialization>(
              std::remove_cvref_t<T>()
          );
        } else {
          const auto to_skip = [&](auto&& _t) {
            return internal::Skip<
                T, _skip_serialization, _skip_deserialization>(std::move(_t));
          };
          return Parser<R, W, std::remove_cvref_t<T>, ProcessorsType>::read(
                     _r, _var
          )
              .transform(to_skip);
        }
      }

      template <class P>
      static void write(
          const W& _w,
          const internal::Skip<T, _skip_serialization, _skip_deserialization>&
                   _skip,
          const P& _parent
      ) noexcept {
        if constexpr (_skip_serialization) {
          using ReflectionType = std::remove_cvref_t<typename internal::Skip<
              T, _skip_serialization, _skip_deserialization>::ReflectionType>;
          Parser<R, W, ReflectionType, ProcessorsType>::write(
              _w, ReflectionType(), _parent
          );
        } else {
          Parser<R, W, std::remove_cvref_t<T>, ProcessorsType>::write(
              _w, _skip.value(), _parent
          );
        }
      }

      static schema::Type to_schema(
          std::map<std::string, schema::Type>* _definitions
      ) {
        return Parser<R, W, std::remove_cvref_t<T>, ProcessorsType>::to_schema(
            _definitions
        );
      }
    };

  } // namespace parsing
} // namespace rfl

#endif