Detecting multiline input

[andrei572]

For backward compatibility reasons, I need to exempt multi-line input form certain rules, but I have not been able to do so using negative lookahead, presumably because of the stated limitation of Go Regex (no support for negative lookarounds). The discussion of the "substitution" extension on this page appears to hint at a workaround but I have to been able to make it work. Is there a recipe for what I am trying to do? Thanks.

[jdkato]

If you could provide an example of what you're trying to do (or what you've tried to do), it would be easier for me to help.

That said, as of v2.9.0, you can use lookarounds in existence-based rules.