Datasets:
File size: 232 Bytes
5eb110b | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 | class P(Protocol):
x: float
def f(arg: P) -> None:
arg.x = 0.42
class C:
x: int
c = C()
f(c) # Would typecheck if covariant subtyping
# of mutable attributes were allowed.
c.x >> 1 # But this fails at runtime
|