Variant Parameter and Return Type Shows Up as (no base)

[Dheatly23]

I have method with complex multiple dispatch of arguments and maybe empty return value. Since Option<T> is not supported as parameters nor return value, i use Variant as workaround.

Example:

#[func]
fn method(&self, arg0: Variant) -> Variant {
    // ...
}

But when i call it in GDScript, it errors with:

Line [XXX]: Cannot get return value of call to "method()" because it returns "void".

When i checked into it's documentation i saw this in methods section:

(no base) method(arg0: (no base))

Is this normal? I can't call it since it returns "void" even though it's not.

[lilizoey]

does the class you're defining method on have a base field? could you show the class struct either way?

[Dheatly23]

Yes the class have base field. I can't exactly whip up a minimal example right now, but it's in (interim) port of my addon.

[Bromeon]

I wonder if this has been introduced with #147.

@Dheatly23 could you check if this also occurs with a revision before that was merged?

[dependencies]
godot = { git = "https://github.com/godot-rust/gdextension", rev = "7d42ebb425ada12459ca810e39f4277d6ddefd32" }

[Dheatly23]

Nope, still shows up as (no base)

For example, the call_wasm method has this signature:

#[func]
fn call_wasm(&self, name: StringName, args: Array) -> Variant {
    // ...
}

[primoze]

This issue has been present since at least #133 with godot rc5, that's where I first encountered it.

[the-ssd]

in docs everything shows up as (no base) but when you start wring function and helper shows up with correct types and names

example:

in the example I don't use Object because #[godot_api] errors and not callable because it is working

[the-ssd]

I just checked godot-cpp
docs in test project work and with Variant

[Dheatly23]

Yeah, i guess some part of it is in Godot docs system itself:

The biggest problem is return value is void, so i can't get the return value. If only i can turn off type checking 🤷‍♂️

[the-ssd]

I think you can return bool and ints
maybe as temporary solution convert to bytes and then back

like this:

and use var_to_bytes_with_objects() to convert to bytes
use godot::prelude::utilities::var_to_bytes_with_objects;