Unhelpful RETURN_VALUE_DISCARDED warning on tweening functions

[m-r-hunt]

Godot version

4.0 beta 4

System information

Windows 10

Issue description

When using tweening functions, you get a GDScript RETURN_VALUE_DISCARDED warning which is pretty useless. For example I have some code like this:

text_tween = create_tween()
text_tween.tween_property(dialog_text, ^":visible_characters", chars, chars/CHARS_PER_SECOND)

I get a warning on the second line here because tween_property returns a PropertyTweener object that I can use to customise the tween further. However in this case I don't need to do so, and this warning is very useless. There's no hidden bug or issue that could arise from ignoring this return value.

To silence it I have a few options, all of which are kind of clunky:

• Declare and assign an _unused variable
• Disable the warning locally with an annotation
• Disable the warning globally in settings

I think there should be some way to have a return value that is marked as "OK to ignore", and these methods should be marked as such so this problem doesn't arise.

Steps to reproduce

Use tweening methods with warnings turned on.

Minimal reproduction project

No response

[Calinou]

Duplicate of godotengine/godot-proposals#682.