include/book_store/purchase_error.hh


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#ifndef PURCHASE_ERROR_HH
#define PURCHASE_ERROR_HH

#include <string_view>

namespace book_store {
class purchase_error {
public:
  enum purchase_error_type {
    person_not_found,
    book_not_found,
    not_enough_stock,
  };

private:
  purchase_error_type _error;

public:
  purchase_error(purchase_error_type error) : _error(error) {}

  [[nodiscard]] auto error() const noexcept -> purchase_error_type;
  [[nodiscard]] auto what() const noexcept -> std::string_view;
};
} // namespace book_store

#endif // PURCHASE_ERROR_HH