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All the Perl that's Practical to Extract and Report

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  • $/ Regex (Score:2, Interesting)

    This is a hard problem. Consider backtracking (stuff it back in a buffer) and greediness (how much do you read?). The trivial cases are pretty easy, but they rapidly get complex.

    • Re:$/ Regex (Score:2, Informative)

      There have been several threads about this on p5p, and I agree with what you say. However, I think that it may be possible to make it work reasonably for non-greedy regexps, and my hunch is that most of the time non-greedy regexps would be the correct way to express most people would want for a line ending.

      Here's the middle of one p5p thread on $/ regexp [] If people are searching, I think that some of the other threads have had qr// in the subject. (Mmm. I'm linking to a message by me. Blantant self-promotio

      • Yes, handling non-greedy regexes (simple alternations, bounded ranges) is possible. I could see disallowing unbounded ranges or the /m and /s flags. I wonder if that'd confuse people who don't know the implementation and the reason for the implementation, though.