Not a complete answer, but just a note:  (?>...) is not a positive lookahead (which would be  (?=...) instead), but is an "atomic" grouping (update: also called an "independent" subexpression) that affects backtracking. See Extended Patterns in perlre.

Give a man a fish:  <%-{-{-{-<

In reply to Re: regex is not working as I intended by AnomalousMonk
in thread regex is not working as I intended by fireblood

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