Echo Writes Code

errors.hpp

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#ifndef CRUCIBLE_WINDOWS_ERRORS_HPP
#define CRUCIBLE_WINDOWS_ERRORS_HPP

#include "crucible/core/either.inl"
#include "crucible/core/errors.hpp"

#include <cstdint>
#include <functional>
#include <optional>
#include <string>
#include <variant>

namespace crucible::windows::errors {
  class HostError : public core::errors::AbstractError {
  public:
    HostError();

    ~HostError() override;

    [[nodiscard]]
    auto describe() const -> std::string override;

    [[nodiscard]]
    auto format() const -> std::string override;

    [[nodiscard]]
    auto source() const & -> std::optional<std::reference_wrapper<core::errors::AbstractError const>> override;

  private:
    std::uint32_t my_error_code { 0 };

    auto format_error_code() const -> std::string;
  };

  struct CreateDirectoryWFailed final {
    HostError host_error {};
  };

  struct CreateFileWFailed final {
    HostError host_error {};
  };

  struct GetFileAttributesWFailed final {
    HostError host_error {};
  };

  struct GetFileSizeExFailed final {
    HostError host_error {};
  };

  struct FindFirstFileWFailed final {
    HostError host_error {};
  };

  struct FindNextFileWFailed final {
    HostError host_error {};
  };

  struct MultiByteToWideCharFailed final {
    HostError host_error {};
  };

  struct ReadFileFailed final {
    HostError host_error {};
  };

  struct RemoveDirectoryWFailed final {
    HostError host_error {};
  };

  struct DeleteFileWFailed final {
    HostError host_error {};
  };

  struct WideCharToMultiByteFailed final {
    HostError host_error {};
  };

  struct WriteFileFailed final {
    HostError host_error {};
  };

  struct InputTooLarge final {
  };

  struct NegativeFileSize final {
  };

  struct OutputTruncated final {
  };

  class WindowsError final : public core::errors::AbstractError {
  public:
    explicit WindowsError(CreateDirectoryWFailed const &variant);

    explicit WindowsError(CreateFileWFailed const &variant);

    explicit WindowsError(GetFileAttributesWFailed const &variant);

    explicit WindowsError(GetFileSizeExFailed const &variant);

    explicit WindowsError(FindFirstFileWFailed const &variant);

    explicit WindowsError(FindNextFileWFailed const &variant);

    explicit WindowsError(MultiByteToWideCharFailed const &variant);

    explicit WindowsError(ReadFileFailed const &variant);

    explicit WindowsError(RemoveDirectoryWFailed const &variant);

    explicit WindowsError(DeleteFileWFailed const &variant);

    explicit WindowsError(WideCharToMultiByteFailed const &variant);

    explicit WindowsError(WriteFileFailed const &variant);

    explicit WindowsError(InputTooLarge const &variant);

    explicit WindowsError(NegativeFileSize const &variant);

    explicit WindowsError(OutputTruncated const &variant);

    ~WindowsError() override;

    template<typename T>
    [[nodiscard]]
    auto is() const -> bool {
      return std::holds_alternative<T>(my_variant);
    }

    [[nodiscard]]
    auto describe() const -> std::string override;

    [[nodiscard]]
    auto format() const -> std::string override;

    [[nodiscard]]
    auto source() const & -> std::optional<std::reference_wrapper<core::errors::AbstractError const>> override;

  private:
    std::variant<CreateDirectoryWFailed, CreateFileWFailed, GetFileAttributesWFailed, GetFileSizeExFailed, FindFirstFileWFailed, FindNextFileWFailed, MultiByteToWideCharFailed, ReadFileFailed, RemoveDirectoryWFailed, DeleteFileWFailed, WideCharToMultiByteFailed, WriteFileFailed, InputTooLarge, NegativeFileSize, OutputTruncated> my_variant;
  };

  template<typename T>
  using WindowsResult = core::either::Either<WindowsError, T>;
}

#endif // CRUCIBLE_WINDOWS_ERRORS_HPP