Flex regex patterns are incorrect.

[justinmeiners]

Set subtraction is translated to the # symbol. Flex doesn't seem to work with patterns containing this symbol. According to this manual this is invalid syntax.

Code:
https://github.com/BNFC/bnfc/blob/master/source/src/BNFC/Backend/CPP/NoSTL/RegToFlex.hs#L52

[andreasabel]

Ah, thanks for reporting. That explains why my token definition is not working. ;)

It seems that the syntax [...]{-}[...] could be used for subtraction in some cases at least.

[andreasabel]

Fixed in PR #238.