__before_ready() is not called if there's no #[godot_api] trait impl

[Houtamelo]

Some features we implemented require __before_ready() to work:

• OnReady initialization
• Rpcs configuration

Consider the class:

#[derive(GodotClass)]
#[class(init, base = Node)]
struct MyClass;

If it does not have a IClass impl:

#[godot_api]
impl INode for MyClass {}

Then __before_ready() will never be run, which makes the features above fail "silently".

---

__before_ready() is only called in code generated by the macro expansion of the #[godot_api] trait impl:

impl ::godot::obj::cap::ImplementsGodotVirtual for OwnerDataApi {
	fn __virtual_call(name: &str) -> ::godot::sys::GDExtensionClassCallVirtual {
		use ::godot::obj::UserClass   as _;
		match name {
			"_ready" => {
				use ::godot::sys;
				type Sig = ((),);
				unsafe extern "C" fn virtual_fn(instance_ptr: sys::GDExtensionClassInstancePtr, args_ptr: *const sys::GDExtensionConstTypePtr, ret: sys::GDExtensionTypePtr) {
					let call_ctx = ::godot::meta::CallContext::func("OwnerDataApi", "ready");
					let _success = ::godot::private::handle_ptrcall_panic(&call_ctx, || <Sig as ::godot::meta::PtrcallSignatureTuple>::in_ptrcall(instance_ptr, &call_ctx, args_ptr, ret, |instance_ptr, params| {
						let () = params;
						let storage = unsafe { ::godot::private::as_storage::<OwnerDataApi>(instance_ptr) };
						let mut instance = ::godot::private::Storage::get_mut(storage);
						instance.__before_ready(); // <---------------------------
					}, sys::PtrcallType::Virtual, ));
				}
				Some(virtual_fn)
			}
			_ => None,
		}
	}
}

A temporary fix is to simply add an empty impl if you don't need to override it:

#[godot_api]
impl INode for MyClass {}