I've got nothing in my TestRe file except for a single line: ~<<<(?:^|\n\r).*(searchstring).*@.*\1.*>>>~
The idea is to log any time there's a line that includes "searchstring" on the right and left of an @. This is just a very rudimentary test because backreferences seem to error for me. I would expect this to match searchstring@searchstring something else seachstring more @ whatever searchstring bla If "searchstring" is to the right and left of an @ sign, it should match. Regex101.com seems to confirm that this works. Like I said, super basic. However, if I enter ~<<<(?:^|\n\r).*(searchstring).*@.*\1.*>>>~ as the only line in TestRe file, I get a warning in the log: - Reference to nonexistent group in regex; marked by <-- HERE in m/(?is:(?:^|\n\r).*(?:searchstring).*@.*\1 <-- HERE .*)/ - try using unoptimized regex To my understanding, the <<< >>> surround should turn of regex optimization for that line, which enables backreferencing (\1) to work and the ~ is required because there's an or in there. Shouldn't the \1 reference (searchstring) ? I don't understand why assp thinks that \1 is a reference to a non-existent group. I also tried removing the <<< >>> and adding assp-do-not-optimize to the top of the TestRe file. No difference. No matter how simple I make the regex, even (.*)@\1, it still complains about the invalid backreference. I've got to be missing something incredibly obvious. I've read through the regex doc in docs, but that doesn't talk about backreferencing in ASSP and I can't find anything in the GUI that makes mention. I've seen posts here indicating that backreferencing matches is possible with an unoptimized expression. A shove in the right direction would be greatly appreciated.
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