| PERLEXPERIMENT(1) | Perl Programmers Reference Guide | PERLEXPERIMENT(1) |
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.
Modified in Perl 5.10.1, 5.12.0
Using this feature triggers warnings in the category "experimental::smartmatch".
The ticket for this experiment is [perl #13173] <https://github.com/Perl/perl5/issues/13173>.
See "PL_keyword_plugin" in perlapi for the mechanism.
The ticket for this experiment is [perl #13199] <https://github.com/Perl/perl5/issues/13199>.
Using this feature triggers warnings in the category "experimental::regex_sets".
The ticket for this experiment is [perl #13197] <https://github.com/Perl/perl5/issues/13197>.
See also: "Extended Bracketed Character Classes" in perlrecharclass
Using this feature triggers warnings in the category "experimental::signatures".
The ticket for this experiment is [perl #13681] <https://github.com/Perl/perl5/issues/13681>.
Using this feature triggers warnings in the category "experimental::refaliasing".
The ticket for this experiment is [perl #14150] <https://github.com/Perl/perl5/issues/14150>.
See also: "Assigning to References" in perlref
Using this feature triggers warnings in the category "experimental::const_attr".
The ticket for this experiment is [perl #14428] <https://github.com/Perl/perl5/issues/14428>.
See also: "Constant Functions" in perlsub
Using this feature triggers warnings in the category "experimental::re_strict".
The ticket for this experiment is [perl #18755] <https://github.com/Perl/perl5/issues/18755>
See "'strict' mode" in re
The ticket for this experiment is [perl #13198] <https://github.com/Perl/perl5/issues/13198>.
See also "PERLIO" in perlrun
Using this feature triggers warnings in the category "experimental::declared_refs".
The ticket for this experiment is [perl #15458] <https://github.com/Perl/perl5/issues/15458>.
See also: "Declaring a Reference to a Variable" in perlref
Variability of up to 255 characters is handled.
Using this feature triggers warnings in the category "experimental::vlb".
The ticket for this experiment is [perl #18756] <https://github.com/Perl/perl5/issues/18756>.
See also: "(*positive_lookbehind:pattern)" in perlre and "(*negative_lookbehind:pattern)" in perlre
This feature is part of an interface intended for internal and experimental use by the perl5 developers. You are unlikely to encounter it in the wild.
Using this feature triggers warnings in the category "experimental::private_use".
The ticket for this experiment is [perl #18758] <https://github.com/Perl/perl5/issues/18758>.
This feature allows regular expression matching against Unicode character properties to be expressed more concisely.
Using this feature triggers warnings in the category "experimental::uniprop_wildcards".
The ticket for this experiment is [perl #18759] <https://github.com/Perl/perl5/issues/18759>.
Using this feature triggers warnings in the category "experimental::isa".
The ticket for this experiment is [perl #18754] <https://github.com/Perl/perl5/issues/18754>
Using this feature triggers warnings in the category "experimental::try".
The ticket for this experiment is [perl #18760] <https://github.com/Perl/perl5/issues/18760>
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.
See also perldebug, perldebtut
See also perlfork
Accepted in Perl 5.8.0
Accepted in Perl 5.8.1
Introduced in Perl 5.12
Exact version of acceptance unclear, but no later than Perl 5.18.
Accepted in Perl 5.20.0
See also perlre
Accepted before Perl 5.20.0. The Socket library is now primarily maintained on CPAN, rather than in the perl core.
See also Socket
Accepted in Perl 5.20.0
See also perlsub
Introduced in Perl 5.10
Accepted in Perl 5.20.0
Accepted in Perl 5.20.0
Accepted in Perl 5.24.0
Accepted in Perl 5.26.0
Accepted in Perl 5.28.0
Accepted in Perl 5.32.0
Accepted in Perl 5.32.0
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
Removed in Perl 5.8.8
Introduced in Perl 5.9.0
Removed in Perl 5.9.5
Introduced in Perl 5.11.2
Removed in Perl 5.11.3
Introduced in Perl 5.10.0
Removed in Perl 5.24.0
Superseded by "Postfix dereference syntax".
Introduced in Perl 5.14.0
Removed in Perl 5.24.0
Deprecated in Perl 5.10.0
Removed in Perl 5.28.0
For a complete list of features check feature.
brian d foy "<brian.d.foy@gmail.com>"
Sebastien Aperghis-Tramoni "<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.
| 2022-02-19 | perl v5.34.1 |