draconisplusplus/include/rfl/parsing/supports_attributes.hpp

#ifndef RFL_PARSING_SUPPORTSATTRIBUTES_HPP_
#define RFL_PARSING_SUPPORTSATTRIBUTES_HPP_

#include <concepts>
#include <string>
#include <string_view>

#include "../Result.hpp"

namespace rfl {
  namespace parsing {

    /// Determines whether a writer supports attributes.
    template <class W>
    concept supports_attributes = requires(
        W                            w,
        std::string_view             name,
        typename W::OutputObjectType obj,
        bool                         is_attribute
    ) {
      {
        w.add_value_to_object(name, name, &obj, is_attribute)
      } -> std::same_as<typename W::OutputVarType>;

      {
        w.add_null_to_object(name, &obj, is_attribute)
      } -> std::same_as<typename W::OutputVarType>;
    };

  } // namespace parsing
} // namespace rfl

#endif