_typing.py 995 B

1234567891011121314151617181920212223242526
  1. # Copyright (c) 2025-2026 Buf Technologies, Inc.
  2. #
  3. # Licensed under the Apache License, Version 2.0 (the "License");
  4. # you may not use this file except in compliance with the License.
  5. # You may obtain a copy of the License at
  6. #
  7. # http://www.apache.org/licenses/LICENSE-2.0
  8. #
  9. # Unless required by applicable law or agreed to in writing, software
  10. # distributed under the License is distributed on an "AS IS" BASIS,
  11. # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12. # See the License for the specific language governing permissions and
  13. # limitations under the License.
  14. # Small set of helpers and Python 3.10 compatibility shims
  15. from __future__ import annotations
  16. from typing import NoReturn as Never, TypeAlias
  17. JsonPrimitive: TypeAlias = bool | int | float | str | None
  18. JsonValue: TypeAlias = JsonPrimitive | list["JsonValue"] | dict[str, "JsonValue"]
  19. def assert_never(value: Never) -> Never:
  20. msg = f"unexpected value: {value!r}"
  21. raise AssertionError(msg)