Author: Zoltán Herczeg Date: To: pcre-dev@exim.org Subject: Re: [pcre-dev] Remove some restrictions of lookbehind assertions
> as normal groups, not as assertion groups. What happens when they are > repeated must be defined - or maybe they should not be allowed to
> repeat, because once again that might be an easy way to infinite loops.
You are right. Since you can put it into a group, it is not possible to prevent repetitions. However the rule that empty matches break (non-fixed) loops may solve this problem.
I start to understand why perl choose to implement assertions as atomic.
