what are the use cases you had in mind with this one? I.e. when would a user want to apply a regular expression to a numeric property?

I think that came out of some Stackoverflow question or maybe even forum. AFAIR it appeared more than once, so I created the issue. More as a ground for a discussion. Personally I am a bit skeptical. There are two things which worries me:

• You need to do a type conversion (from number to string). So far we always refrained from type conversions of this type
• Obviously there is a problem with float/double types which get converted to strings

Given that (at least in BV) we tend to be more on the conservative side, I am not sure it is such a good thing to do. As said, open for discussion.