in reply to Regex::Reverse tricky test cases

Why would you want to reverse a regex? Isn't $string =~ reverse(qr/.../) the same as reverse(reverse($string) =~ qr/.../);?
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Re^2: Regex::Reverse tricky test cases
by Roy Johnson (Monsignor) on May 17, 2005 at 13:11 UTC
    sexeger.

    Some patterns — notably those with negative lookbehinds, which cannot be variable-length, but also others — work better backwards. Yes, you have to reverse the string to be matched, as well as the regex, and then you have to reverse whatever you captured. Sometimes it's still a win.

    Caution: Contents may have been coded under pressure.
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