Current File : //var/opt/nydus/ops/referencing/_attrs.py
from __future__ import annotations
from typing import NoReturn, TypeVar
from attrs import define as _define, frozen as _frozen
_T = TypeVar("_T")
def define(cls: type[_T]) -> type[_T]: # pragma: no cover
cls.__init_subclass__ = _do_not_subclass
return _define(cls)
def frozen(cls: type[_T]) -> type[_T]:
cls.__init_subclass__ = _do_not_subclass
return _frozen(cls)
class UnsupportedSubclassing(Exception):
def __str__(self):
return (
"Subclassing is not part of referencing's public API. "
"If no other suitable API exists for what you're trying to do, "
"feel free to file an issue asking for one."
)
@staticmethod
def _do_not_subclass() -> NoReturn: # pragma: no cover
raise UnsupportedSubclassing()
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