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from typing import NoReturn
class CruException(Exception):
"""Base exception class of all exceptions in cru."""
class CruUnreachableError(CruException):
"""Raised when a code path is unreachable."""
def cru_unreachable() -> NoReturn:
raise CruUnreachableError()
class CruInternalError(CruException):
"""Raised when an internal logic error occurs."""
class CruUserFriendlyException(CruException):
def __init__(
self, message: str, user_message: str | None = None, *args, **kwargs
) -> None:
super().__init__(message, *args, **kwargs)
self._user_message = user_message or message
@property
def user_message(self) -> str:
return self._user_message
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