Exported variable with a range that does not include zero

Question

How can I export a variable that allows only -1 and +1 as values?

export(int/float, -1, 1, 2) var direction

The declaration above only allows values of 0 and 1

Comments

EDIT: I misread your code, this actually looks like a bug in your particular case.

However, if you wanted to allow values between -2 and 2 for example, and forbidding zero, it would currently not be possible. What I do in this case usually is to either expose the variable in a different way (multiplier instead of a divider for example) or just add a defensive if in the setter to be sure to not set incorrect values.
If you need only a few values though, maybe you could export it as an enumeration?

In 3.0 there have been mentions of improving range definitions https://github.com/godotengine/godot/pull/11599 but I don't know what's the state of it.

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this seems a bug to me.
according to documentation for export, it should be possible i think.
http://docs.godotengine.org/en/stable/learning/scripting/gdscript/gdscript_basics.html#exports

in my short test,

export(int, -2, 2, 2) var direction

this allows -2, 0, 2

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yeah, I misread the code (though part of my answer is still valid).
Maybe that's because the editor snaps with zero instead of the min value?

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possibly. yeah.
the initial value of slider in the inspector should be handled properly.

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I'll try with some mutator, thanks for info!

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It could be a bug, maybe. I was thinking the same thing.