Method __subclasscheck__

crates/vm/src/builtins/union.rs:148–162

(
        zelf: PyRef<Self>,
        obj: PyObjectRef,
        vm: &VirtualMachine,
    )

    #[pymethod]
    fn __subclasscheck__(
        zelf: PyRef<Self>,
        obj: PyObjectRef,
        vm: &VirtualMachine,
    ) -> PyResult<bool> {
        if zelf
            .args
            .iter()
            .any(|x| x.class().is(vm.ctx.types.generic_alias_type))
        {
            Err(vm.new_type_error("issubclass() argument 2 cannot be a parameterized generic"))
        } else {
            obj.is_subclass(zelf.__args__().as_object(), vm)
        }
    }

    fn __or__(zelf: PyObjectRef, other: PyObjectRef, vm: &VirtualMachine) -> PyResult {
        type_::or_(zelf, other, vm)