Not possible to set a typed array property from C#

[okla]

Godot version

4.0.stable.mono

System information

Fedora Linux 37

Issue description

In foo.gd there is a property var arr: Array[int]. Trying to set it from a C# script using

foo.Set("arr", Godot.Collections.Array<int>{ 0, 1, 2 });

doesn't work, the array stays empty. Making it untyped (var arr: Array) fixes the problem, so there is something with static types.

Steps to reproduce

1. Create a typed array property in a GDScript
2. Try to set it from a C# script

Minimal reproduction project

N/A

[Calinou]

Does the same set() syntax work on a typed array in GDScript?

[raulsntos]

It seems in GDScript setting a typed array works as long as the value is also a typed array with the same element type:

		set value
		Array	Array[int]	Array[float]
set property type	Array	✅	✅	✅
	Array[int]	❌	✅	❌
	Array[float]	❌	❌	✅

In C#, marshaling a Godot.Collections.Array<T> likely ends up marshaled as an untyped array which won't work (as can be seen in the first column of the previous table).

Also note that GDScript's INT is 64-bit so the C# equivalent would be long, not int.

[ArtyIF]

This also happens with setting values of C# scripts from other C# scripts as well (my script is deliberately not a [GlobalClass])

[filipinyo]

This becomes really essential if you use plugins that are made in gdscript and you want to interact with them through C#. Majority of plugins are in gdscript so it happens quite often.

[akien-mga]

@okla Could you clarify why this is closed? Was it resolved in a current Godot release?

[okla]

@akien-mga I was under the impression that this issue was resolved recently but I don't have a C# project at hand to check this. Will reopen the issue until someone confirms if this is resolved or not.

[raulsntos]

This was likely fixed by #98545, and I can't reproduce it in 4.6.0, so closing. Let us know if you still encounter the issue and we can reopen.