Datasets:
File size: 1,243 Bytes
d8a7ddd | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 | """
Tests the handling of annotated "self" parameters in a protocol.
"""
# Specification: https://typing.readthedocs.io/en/latest/spec/protocol.html#self-types-in-protocols
from typing import Generic, Protocol, Self, TypeVar
C = TypeVar("C", bound="Copyable")
class Copyable(Protocol):
def copy(self: C) -> C:
return self
class One:
def copy(self) -> "One":
return One()
T = TypeVar("T", bound="Other")
class Other:
def copy(self: T) -> T:
return self
c: Copyable
c = One() # OK
c = Other() # OK
T1_co = TypeVar("T1_co", covariant=True)
T2_co = TypeVar("T2_co", covariant=True)
class P1Parent(Protocol[T2_co]):
def f0(self, /) -> Self:
...
class P1Child(P1Parent[T2_co], Protocol[T2_co]):
...
class C1(Generic[T1_co]):
def f0(self, /) -> Self:
return self
a1: P1Parent[str] = C1[str]()
b1: P1Child[str] = C1[str]()
class P2Parent(Protocol[T1_co]):
def f0(self, right: Self, /) -> "P2Parent[T1_co]":
return right
class P2Child(P2Parent[T1_co], Protocol[T1_co]):
...
class C2(Generic[T2_co]):
def f0(self, other: Self) -> "C2[T2_co]":
return other
a2: P2Parent[str] = C2[str]() # OK
b2: P2Child[str] = C2[str]() # OK
|