empty string in String features

[jmhorcas]

I have a question regarding if empty strings should be allowed or not in a String typed feature.
For instance, the following constraint is not valid according to the current grammar:
MyStringFeature != ''

where MyStringFeature is a String feature, and '' is the empty string.

[SundermannC]

Thanks a lot for pointing that out, @jmhorcas! I do not see a reason why this should not be possible and would rather consider this a bug that should be rather simple to resolve. What do you think @coemgen1992 and @jagalindo?

[jagalindo]

Good point. Its quite easy to solve. We can discuss that on next meeting. I'm trying to think on use cases for that, but surely there are some. Its quite easy to solve