Corner case: What about built-in generics' subclasses? #9
Description
To ensure full compatibility, I think that
from typing import ForwardRef
from eval_type_backport import eval_type_backport
class DictSubclass(dict):
pass
eval_type_backport(ForwardRef('DictSubclass[str, int]'), globals())should not raise an error on Python 3.8, since it doesn't on Python 3.9.
Normally you would re-bind the Generic signature, using
KT = TypeVar('KT')
VT = TypeVar('VT')
class DictSubclass(dict[KT, VT], Generic[KT, VT]):
...but we know that in Python 3.8 it's simply impossible without subclassing typing.Dict.
What do you think?