[Pharo-users] Regex negative look behind

Hello - newbie question here. Is the regex implememtation meant to handle negative lookbehind, or is that out of scope? Something like (?<!-)\b[0-9]+ (which should not match negative integers) When I try to turn the string into a regex I'm getting a parsing error. If it’s out of scope, is there an alternative approach in Pharo? Thanks, Steve *Steve Hayes*