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Add '.vim/bundle/black/' from commit '2f3fa1f6d0cbc2a3f31c7440c422da173b068e7b'
[etc/vim.git] / .vim / bundle / black / src / 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
8 T = TypeVar("T")
9 E = TypeVar("E", bound=Exception)
10
11
12 class Ok(Generic[T]):
13     def __init__(self, value: T) -> None:
14         self._value = value
15
16     def ok(self) -> T:
17         return self._value
18
19
20 class Err(Generic[E]):
21     def __init__(self, e: E) -> None:
22         self._e = e
23
24     def err(self) -> E:
25         return self._e
26
27
28 Result = Union[Ok[T], Err[E]]