Q: Upper/Lower casing in Advanced Text Processor

How do I upper/lowercase the found patterns in Advanced Text Processor? Using \L or \U does not seem to work.

Are you referring to regular expressions in the replace pattern?
I think it doesn't support \L \U modifiers in replace patterns, pretty much limited to groups only

Ohh :( I guess that makes creating a ruleset that could convert variable names between snake case and camel case not possible, right?

Possible with one letter replaced at a time, which would require doing the entire alphabet. Not very efficient.

FYI, There is a enhancement ticket to replace current regex engine, which is kind of limited to a subset of Perl regex, with a .NET standard regex engine, but that ticket is on hold pending further investigation. It would be backward incompatible and also not optimized for large text processing, which we require for some functions.