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from __future__ import annotations
# ruff: noqa: ARG004
from enum import Enum
from typing import Any
class NoAutoEnum(Enum):
"""Enum base class that prohibits the use of enum.auto() for value assignment.
This behavior is achieved by overriding the value generation mechanism.
Examples:
>>> from enum import auto
>>> from narwhals._enum import NoAutoEnum
>>>
>>> class Colors(NoAutoEnum):
... RED = 1
... GREEN = 2
>>> Colors.RED
<Colors.RED: 1>
>>> class ColorsWithAuto(NoAutoEnum):
... RED = 1
... GREEN = auto()
Traceback (most recent call last):
...
ValueError: Creating values with `auto()` is not allowed. Please provide a value manually instead.
Raises:
ValueError: If `auto()` is attempted to be used for any enum member value.
"""
@staticmethod
def _generate_next_value_(
name: str, start: int, count: int, last_values: list[Any]
) -> Any:
msg = "Creating values with `auto()` is not allowed. Please provide a value manually instead."
raise ValueError(msg)
__all__ = ["NoAutoEnum"]
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