A customer was asking about lookahead support when searching with regular expressions.
It seems that positive lookahead is supported as in q(?=u) to match a "q" that is followed by a "u".
However, negative lookahead as in q(?!u), positive lookbehind as in (?<=u)q, and negative lookbehind as in (?<!u)q are not supported and throw expression parsing errors.
Is this a limitation of the regular expression engine in SyntaxEdit? If so then can lookaround support be improved?