Function vectorcall_wrapper

crates/vm/src/builtins/descriptor.rs:445–472

Vectorcall for wrapper_descriptor: calls wrapped slot function

(
    zelf_obj: &PyObject,
    mut args: Vec<PyObjectRef>,
    nargs: usize,
    kwnames: Option<&[PyObjectRef]>,
    vm: &VirtualMachine,
)

/// Vectorcall for wrapper_descriptor: calls wrapped slot function
fn vectorcall_wrapper(
    zelf_obj: &PyObject,
    mut args: Vec<PyObjectRef>,
    nargs: usize,
    kwnames: Option<&[PyObjectRef]>,
    vm: &VirtualMachine,
) -> PyResult {
    let zelf: &Py<PyWrapper> = zelf_obj.downcast_ref().unwrap();
    // First positional arg is self
    if nargs == 0 {
        return Err(vm.new_type_error(format!(
            "descriptor '{}' of '{}' object needs an argument",
            zelf.name.as_str(),
            zelf.typ.name()
        )));
    }
    let obj = args.remove(0);
    if !obj.fast_isinstance(zelf.typ) {
        return Err(vm.new_type_error(format!(
            "descriptor '{}' requires a '{}' object but received a '{}'",
            zelf.name.as_str(),
            zelf.typ.name(),
            obj.class().name()
        )));
    }
    let rest = FuncArgs::from_vectorcall_owned(args, nargs - 1, kwnames);
    zelf.wrapped.call(obj, rest, vm)
}

pub fn init(ctx: &'static Context) {
    PyMemberDescriptor::extend_class(ctx, ctx.types.member_descriptor_type);