in reply to Re: Perl named operators and builtin subs introduced since 5.6
in thread Finding when a feature or keyword was introduced
It's been that way since at least 5.8.9. ("t" means threaded. Ignore that.)
$ for v in 5.8.9 5.10t 5.12t 5.14t 5.16t 5.18t 5.20t; do echo $v $v/bin/perl -le'print ref( qr/x/ )' done 5.8.9 Regexp 5.10t Regexp 5.12t Regexp 5.14t Regexp 5.16t Regexp 5.18t Regexp 5.20t Regexp
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