Coverage for /pythoncovmergedfiles/medio/medio/usr/local/lib/python3.8/site-packages/black/rusty.py: 71%

1"""An error-handling model influenced by that used by the Rust programming language 

2 

3See https://doc.rust-lang.org/book/ch09-00-error-handling.html. 

4""" 

5from typing import Generic, TypeVar, Union 

6 

7T = TypeVar("T") 

8E = TypeVar("E", bound=Exception) 

9 

10 

11class 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 

19class 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 

27Result = Union[Ok[T], Err[E]]