godotengine
Unable to Exporting Typed Arrays of Inner Classes
Godot version
4.0.stable
System information
Kubuntu 22.10, GLES 3, Intel HD Graphics 2000
Issue description
When trying to export typed arrays of a inner class, the type declaration in the resource file becomes Array[Object].
Steps to reproduce
# res://test.gd
class_name test
extends Resource
class example_class:
extends Resource
@export var example_array: Array[example_class] = [example_class.new()]
Create a new "test.gd" resource in the editor and add an empty example_class to the example_array.
Save the resource file to a file with a .tres extension.
Open the file and you can see example_array = Array[Object]([null]).
Minimal reproduction project
N/A
[example_class.new()] is a non-constant expression, so export won't work (at least without @tool). See #71091.
But it looks like inner classes are not supported, the "Cannot get class 'example_class'." error is displayed. As far as I remember, custom resources export requires a global name (class_name), which only scripts can have. In this case, we should add a compile-time error.
Exported variables need scripts that can be identified by path. I didn't test, but const SCRIPT = preload(some script) can theoretically work too as a type. But inner classes and built-in scripts won't work.
