How to correctly compare against enum values?

Krumelur

I'm saving an Image using this code:

var error = convert_image.save_png(img_name)

According to the docs, error is now an Error, an enum defined in the Image class.

But how would I now check if error is Error.OK? This does not work:

if error != Image.Error.OK:
	print("Error: " + str(error))

And it does not give me auto completion either in the editor. This does work:

if error != OK:

But how does it now that it's Error.OK and not some other OK? Is there a way to use Error.OK?

TwistedTwigleg

I did some searching around on Google, and couldn’t find anyone using Godot defined enumerators directly, as everything I found uses the values in global space.

It appears you can only use the enumerator values defined in global space directly. There is an open feature request to add a way to directly access enumerators though.

Interestingly, the Error enum’s OK, the Varient.Opperator enum’s OP_Equal, and JoystickList enum’s JOY_BUTTON_0 all are mapped to a integer with a value of 0. I have tested, and you can swap them out interchangeable without causing any issues. Not sure if this could possibility lead to unexpected behavior or not, but I thought it was interesting.

kryzmak

There is no global class "Error", therefore it cannot work. "OK" is a globalscope enumerator (like @TwistedTwigleg mentioned). Your second thought is correct, I think if error != OK: As far as I can see in the documentation, there is only one "OK" enum. Therefore it can be no kind of another "OK" (does that make sense?).