blob: ea674509ce2c6feddc21fe854198b26cf4279fc8 (
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from typing import Any
def make_unique_object() -> Any:
class _CruUnique:
_i = False
def __init__(self):
if self._i:
raise ValueError("_CruAttrNotSet is a singleton!")
self._i = True
def __copy__(self):
return self
def __eq__(self, other):
return isinstance(other, _CruUnique)
v = _CruUnique()
return v
def make_bool_unique_object(b: bool) -> Any:
class _CruBoolUnique:
_i = False
def __init__(self):
super().__init__(b)
if self._i:
raise ValueError("_CruAttrNotSet is a singleton!")
self._i = True
def __copy__(self):
return self
def __eq__(self, other):
return isinstance(other, _CruBoolUnique) or b == other
def __bool__(self):
return b
v = _CruBoolUnique()
return v
CRU_NOT_FOUND = make_bool_unique_object(False)
CRU_USE_DEFAULT = make_unique_object()
CRU_DONT_CHANGE = make_unique_object()
CRU_PLACEHOLDER = make_unique_object()
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