Negative lookahead or optional not supported

[tirthb]

Thank you for this useful regex utility in solidity. Is negative lookahead and optional not supported yet?
e.g. solregex --name TestRegex '(?!00)[0-9]{2}' or solregex --name TestRegex '[0-9]\-?[0-9]'
For reference: http://www.regular-expressions.info/lookaround.html

[tirthb]

Just noticed your readme, saying it is not supported.

[gnidan]

Oh, this could stay open. It's something I'd like to support with this project!