djavu-asus/emacs/elpy/rpc-venv/lib/python3.11/site-packages/black/rusty.py

   1 """An error-handling model influenced by that used by the Rust programming language
   2
   3 See https://doc.rust-lang.org/book/ch09-00-error-handling.html.
   4 """
   5 from typing import Generic, TypeVar, Union
   6
   7 T = TypeVar("T")
   8 E = TypeVar("E", bound=Exception)
   9
  10
  11 class Ok(Generic[T]):
  12     def __init__(self, value: T) -> None:
  13         self._value = value
  14
  15     def ok(self) -> T:
  16         return self._value
  17
  18
  19 class Err(Generic[E]):
  20     def __init__(self, e: E) -> None:
  21         self._e = e
  22
  23     def err(self) -> E:
  24         return self._e
  25
  26
  27 Result = Union[Ok[T], Err[E]]