When you use a wildcard tag search on questions with any perl* tag, it erroneously includes the regex tag in the search set:
Notice the regex tag at the bottom. It should not be there, because contrary to popular belief, perl != regex. :)
1 Answer
There is a tag - perl-regex which is a synonym of regex, as can be seen on its synonym page
perl* will catch perl-regex which shows up as regex due to the synonym relationship.
answered Jul 23, 2013 at 17:06
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How can this be a good thing? I’m pretty sure there are non-Perl regexes in existence.– tchristCommented Jul 23, 2013 at 17:07
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1@tchrist - Did I say it was a good thing? Synonyms are suggested and accepted by the community. Commented Jul 23, 2013 at 17:07
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4No, it's not a mistake. The point of the synonym for perl-regex mapping to regex is that anything tagged perl-regex gets moved to regex, which is fine. regex is not assumed to be related to perl in any way. It just happens to come up with the wildcard search; perhaps that should be fixed, but I'm not sure it should be - in other similar cases you might prefer the synonym to be included.– JoeCommented Jul 23, 2013 at 17:09
-[regex]perl*, I shouldn’t therefore getregextoo.