Why is Perl's smart-match operator considered broken?

Posted by Sean McMillan on Programmers See other posts from Programmers or by Sean McMillan
Published on 2011-11-28T22:25:15Z Indexed on 2011/11/29 2:07 UTC
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I've seen a number of comments across the web Perl's smart-match operator is broken. I know it originally was part of Perl 6, then was implemented in Perl 5.10 off of an old version of the spec, and was then corrected in 5.10.1 to match the current Perl 6 spec.

Is the problem fixed in 5.10.1+, or are there other problems with the smart-match operator that make it troublesome in practice?

What are the problems?

Is there a yet-more-updated version (Perl 6, perhaps) that fixes the problems?

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