Interface Callable

crates/vm/src/types/slot.rs:1692–1714

#[pyclass]
pub trait Callable: PyPayload {
    type Args: FromArgs;

    #[inline]
    #[pyslot]
    fn slot_call(zelf: &PyObject, args: FuncArgs, vm: &VirtualMachine) -> PyResult {
        let zelf = zelf.downcast_ref().ok_or_else(|| {
            let repr = zelf.repr(vm);
            let help: Wtf8Buf = if let Ok(repr) = repr.as_ref() {
                repr.as_wtf8().to_owned()
            } else {
                zelf.class().name().to_owned().into()
            };
            let mut msg = Wtf8Buf::from("unexpected payload for __call__ of ");
            msg.push_wtf8(&help);
            vm.new_type_error(msg)
        })?;
        let args = args.bind(vm)?;
        Self::call(zelf, args, vm)
    }

    fn call(zelf: &Py<Self>, args: Self::Args, vm: &VirtualMachine) -> PyResult;
}

#[pyclass]
pub trait GetDescriptor: PyPayload {