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<!-- Thank you for contributing to Ruff! To help us out with reviewing, please consider the following: - Does this pull request include a summary of the change? (See below.) - Does this pull request include a descriptive title? - Does this pull request include references to any relevant issues? --> ## Summary fixes #15048 We want to handle more types from Type::KnownInstance ## Test Plan Add tests for each type added explicitly in the match --------- Co-authored-by: Dhruv Manilawala <dhruvmanila@gmail.com>
1.3 KiB
1.3 KiB
Union
Annotation
typing.Union can be used to construct union types same as | operator.
from typing import Union
a: Union[int, str]
a1: Union[int, bool]
a2: Union[int, Union[bytes, str]]
a3: Union[int, None]
a4: Union[Union[bytes, str]]
a5: Union[int]
a6: Union[()]
def f():
# revealed: int | str
reveal_type(a)
# Since bool is a subtype of int we simplify to int here. But we do allow assigning boolean values (see below).
# revealed: int
reveal_type(a1)
# revealed: int | bytes | str
reveal_type(a2)
# revealed: int | None
reveal_type(a3)
# revealed: bytes | str
reveal_type(a4)
# revealed: int
reveal_type(a5)
# revealed: Never
reveal_type(a6)
Assignment
from typing import Union
a: Union[int, str]
a = 1
a = ""
a1: Union[int, bool]
a1 = 1
a1 = True
# error: [invalid-assignment] "Object of type `Literal[b""]` is not assignable to `int | str`"
a = b""
Typing Extensions
from typing_extensions import Union
a: Union[int, str]
def f():
# revealed: int | str
reveal_type(a)
Invalid
from typing import Union
# error: [invalid-type-form] "`typing.Union` requires at least one argument when used in a type expression"
def f(x: Union) -> None:
reveal_type(x) # revealed: Unknown