draconisplusplus/include/rfl/parsing/Parser_ptr.hpp

#ifndef RFL_PARSING_PARSER_PTR_HPP_
#define RFL_PARSING_PARSER_PTR_HPP_

#include <map>
#include <type_traits>

#include "../Ref.hpp"
#include "../Result.hpp"
#include "../always_false.hpp"
#include "Parent.hpp"
#include "Parser_base.hpp"
#include "schema/Type.hpp"

namespace rfl {
  namespace parsing {

    template <class R, class W, class T, class ProcessorsType>
      requires AreReaderAndWriter<R, W, T*>
    struct Parser<R, W, T*, ProcessorsType> {
      using InputVarType  = typename R::InputVarType;
      using OutputVarType = typename W::OutputVarType;

      using ParentType = Parent<W>;

      /// Expresses the variables as type T.
      static Result<T*> read(const R& _r, const InputVarType& _var) noexcept {
        static_assert(
            always_false_v<T>,
            "Reading into raw pointers is dangerous and "
            "therefore unsupported. "
            "Please consider using std::unique_ptr, rfl::Box, "
            "std::shared_ptr, "
            "rfl::Ref or std::optional instead."
        );
        return Error("Unsupported.");
      }

      template <class P>
      static void write(const W& _w, const T* _ptr, const P& _parent) noexcept {
        if (!_ptr) {
          ParentType::add_null(_w, _parent);
          return;
        }
        Parser<R, W, std::remove_cvref_t<T>, ProcessorsType>::write(
            _w, *_ptr, _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