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from enum import Enum, auto
from typing import Self, TypeGuard, TypeVar
from ._base import CRU
_T = TypeVar("_T")
class CruConstantBase(Enum):
@classmethod
def check(cls, v: _T | Self) -> TypeGuard[Self]:
return isinstance(v, cls)
@classmethod
def check_not(cls, v: _T | Self) -> TypeGuard[_T]:
return not cls.check(v)
@classmethod
def value(cls) -> Self:
return cls.VALUE # type: ignore
class CruNotFound(CruConstantBase):
VALUE = auto()
class CruUseDefault(CruConstantBase):
VALUE = auto()
class CruDontChange(CruConstantBase):
VALUE = auto()
class CruNoValue(CruConstantBase):
VALUE = auto()
class CruPlaceholder(CruConstantBase):
VALUE = auto()
CRU.add_objects(
CruNotFound,
CruUseDefault,
CruDontChange,
CruNoValue,
CruPlaceholder,
)
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