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Ref https://github.com/astral-sh/ruff/pull/18251#pullrequestreview-2881810681
957 B
957 B
Static binary operations using in
Basic functionality
This demonstrates type inference support for <str-literal> in <tuple>:
from ty_extensions import static_assert
static_assert("foo" in ("quux", "foo", "baz"))
static_assert("foo" not in ("quux", "bar", "baz"))
With variables
from ty_extensions import static_assert
x = ("quux", "foo", "baz")
static_assert("foo" in x)
x = ("quux", "bar", "baz")
static_assert("foo" not in x)
Statically unknown results in a bool
def _(a: str, b: str):
reveal_type("foo" in (a, b)) # revealed: bool
Values being unknown doesn't mean the result is unknown
For example, when the types are completely disjoint:
from ty_extensions import static_assert
def _(a: int, b: int):
static_assert("foo" not in (a, b))
Failure cases
# We don't support byte strings.
reveal_type(b"foo" not in (b"quux", b"foo", b"baz")) # revealed: bool