Class OptionalFieldsObject

python/pyfory/tests/test_struct.py:1079–1084

@dataclass
class OptionalFieldsObject:
    f1: Optional[int] = None
    f2: Optional[str] = None
    f3: Optional[List[int]] = None
    f4: int = 0
    f5: str = ""


@pytest.mark.parametrize("xlang", [False, True])