Perl has been proven to be impossible to parse.
Yeah, that's why PPI is such a waste of time. Perlcritic and perltidy is just stabbing in the dark. And the perl-to-javascript compiler(*) that was shown at FOSDEM was just a scam. ;-)
Text editors do their best, but sometimes fall short.
Text editors have much different problem. They have to be 1) interactive (which means, instant response), and 2) work on code in progress -- most of the time, not even perl can parse the text, because it isn't finished yet.

(*) Yes, I know it isn't complete yet. Give Flavio some time.

In reply to Re^4: regex issue by JavaFan
in thread regex issue by perlNewby

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