perlexperiment - A listing of experimental features in Perl
This document lists the current and past experimental features in the perl core. Although all of these are documented with their appropriate topics, this succinct listing gives you an overview and basic facts about their status.
So far we've merely tried to find and list the experimental features and infer their inception, versions, etc. There's a lot of speculation here.
our
unique
Introduced in Perl 5.8.0
Deprecated in Perl 5.10.0
The ticket for this feature is [perl #119313].
~~
Introduced in Perl 5.10.0
Modified in Perl 5.10.1, 5.12.0
Using this feature triggers warnings in the category experimental::smartmatch.
experimental::smartmatch
The ticket for this feature is [perl #119317].
$_
Using this feature triggers warnings in the category experimental::lexical_topic.
experimental::lexical_topic
The ticket for this feature is [perl #119315].
The ticket for this feature is [perl #119455].
See "PL_keyword_plugin" in perlapi for the mechanism.
Introduced in: Perl 5.11.2
Introduced in Perl 5.14.0
The ticket for this feature is [perl #119437].
Introduced in: Perl 5.18
See also: "Lexical Subroutines" in perlsub
Using this feature triggers warnings in the category experimental::lexical_subs.
experimental::lexical_subs
The ticket for this feature is [perl #120085].
The ticket for this feature is [perl #119451].
See also: "Extended Bracketed Character Classes" in perlrecharclass
Using this feature triggers warnings in the category experimental::regex_sets.
experimental::regex_sets
\s
Introduced in Perl 5.18
Introduced in Perl 5.20.0
Using this feature triggers warnings in the category experimental::signatures.
experimental::signatures
The ticket for this feature is [perl #121481].
Using this feature triggers warnings in the category experimental::postderef.
experimental::postderef
The ticket for this feature is [perl #120162].
The ticket for this feature is [perl #119453].
See also perlrun
installhtml
The ticket for this feature is [perl #116487].
These features were so wildly successful and played so well with others that we decided to remove their experimental status and admit them as full, stable features in the world of Perl, lavishing all the benefits and luxuries thereof. They are also awarded +5 Stability and +3 Charisma.
Introduced in Perl 5.005
Introduced in Perl 5.6.0
See also perldebug, perldebtut
Introduced in Perl 5.6.1
See also perlfork
Accepted in Perl 5.8.0
Accepted in Perl 5.8.1
\N
The \N character class, not to be confused with the named character sequence \N{NAME}, denotes any non-newline character in a regular expression.
\N{NAME}
Introduced in Perl 5.12
Exact version of acceptance unclear, but no later than Perl 5.18.
(?{code})
(??{ code })
Accepted in Perl 5.20.0
See also perlre
Introduced in Perl 5.9.2
Accepted before Perl 5.20.0. The Socket library is now primarily maintained on CPAN, rather than in the perl core.
See also Socket
See also perlsub
(*ACCEPT)
Introduced in: Perl 5.10
These features are no longer considered experimental and their functionality has disappeared. It's your own fault if you wrote production programs using these features after we explicitly told you not to (see perlpolicy).
Removed in Perl 5.10
Moved from Perl 5.9.0 to CPAN
Removed in Perl 5.9.0
Getopt::Long upgraded to version 2.35
Getopt::Long
Removed in Perl 5.8.8
The -A command line switch
-A
Introduced in Perl 5.9.0
Removed in Perl 5.9.5
Moved from Perl 5.10.1 to CPAN
legacy
The experimental legacy pragma was swallowed by the feature pragma.
feature
Introduced in: 5.11.2
Removed in: 5.11.3
For a complete list of features check feature.
brian d foy <brian.d.foy@gmail.com>
<brian.d.foy@gmail.com>
Sébastien Aperghis-Tramoni <saper@cpan.org>
<saper@cpan.org>
Copyright 2010, brian d foy <brian.d.foy@gmail.com>
You can use and redistribute this document under the same terms as Perl itself.
To install vars, copy and paste the appropriate command in to your terminal.
cpanm
cpanm vars
CPAN shell
perl -MCPAN -e shell install vars
For more information on module installation, please visit the detailed CPAN module installation guide.