CONTENTS

• NAME
• DESCRIPTION
  • Current experiments
  • Accepted features
  • Removed features
• AUTHORS
• COPYRIGHT
• LICENSE

#NAME

perlexperiment - A listing of experimental features in Perl

#DESCRIPTION

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.

#Current experiments

#-Dusemultiplicity -Duseithreads

Introduced in Perl 5.6.0

#Long Doubles Still Don't Work In Solaris

Introduced in Perl 5.7.0

#our can now have an experimental optional attribute unique

Introduced in Perl 5.8.0

Deprecated in Perl 5.10.0

#Linux abstract Unix domain sockets

Introduced in Perl 5.9.2

See also Socket

#Pod::HTML2Pod

#Pod::PXML

#The <:pop> IO pseudolayer

See also perlrun

#The <:win32> IO pseudolayer

See also perlrun

#MLDBM

See also perldsc

#internal functions with M flag

See also perlguts

#lex_start API

Introduced in Perl 5.13.7

#internal API for %^H

Introduced in Perl 5.13.7

See also cophh_ in perlapi.

#alloccopstash

Introduced in Perl 5.18.0

#av_create_and_push

#av_create_and_unshift_one

#av_create_and_unshift_one

#cop_store_label

Introduced in Perl 5.16.0

#PL_keyword_plugin

#gv_fetchmethod_*_flags

Introduced in Perl 5.16.0

#hv_iternext_flags

#lex_bufutf8

#lex_discard_to

#lex_grow_linestr

#lex_next_chunk

#lex_peek_unichar

#lex_read_space

#lex_read_to

#lex_read_unichar

#lex_stuff_pv

#lex_stuff_pvn

#lex_stuff_pvs

#lex_stuff_sv

#lex_unstuff

#op_scope

#op_lvalue

#parse_fullstmt

#parse_stmtseq

#PL_parser->bufend

#PL_parser->bufptr

#PL_parser->linestart

#PL_parser->linestr

#Perl_signbit

#pad_findmy

#sv_utf8_decode

#sv_utf8_downgrade

#bytes_from_utf8

#bytes_to_utf8

#utf8_to_bytes

#Lvalue subroutines

Introduced in Perl 5.6.0

See also perlsub

#There is an installhtml target in the Makefile.

#Unicode in Perl on EBCDIC

#(?{code})

See also perlre

#(??{ code })

See also perlre

#Smart match (~~)

Introduced in Perl 5.10.0

Modified in Perl 5.10.1, 5.12.0

#Lexical $_

Introduced in Perl 5.10.0

#Backtracking control verbs

(*ACCEPT)

Introduced in: Perl 5.10

See also: "Special Backtracking Control Verbs" in perlre

#Code expressions, conditional expressions, and independent expressions in regexes

#gv_try_downgrade

See also perlintern

#Experimental Support for Sun Studio Compilers for Linux OS

See also perllinux

#Pluggable keywords

See "PL_keyword_plugin" in perlapi for the mechanism.

Introduced in: Perl 5.11.2

#Array and hash container functions accept references

Introduced in Perl 5.14.0

#Lexical subroutines

Introduced in: Perl 5.18

See also: "Lexical Subroutines" in perlsub

#Regular Expression Set Operations

Introduced in: Perl 5.18

See also: "Extended Bracketed Character Classes" in perlrecharclass

#Accepted features

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.

#The \N regex character class

The \N character class, not to be confused with the named character sequence \N{NAME}, denotes any non-newline character in a regular expression.

Introduced in: Perl 5.12

#fork() emulation

Introduced in Perl 5.6.1

See also perlfork

#DB module

Introduced in Perl 5.6.0

See also perldebug, perldebtut

#Weak references

Introduced in Perl 5.6.0

#Internal file glob

Introduced in Perl 5.6.0

#die accepts a reference

Introduced in Perl 5.005

#64-bit support

Introduced in Perl 5.005

#Removed features

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).

#legacy

The experimental legacy pragma was swallowed by the feature pragma.

Introduced in: 5.11.2

Removed in: 5.11.3

#Assertions

The -A command line switch

Introduced in Perl 5.9.0

Removed in Perl 5.9.5

#Test::Harness::Straps

Moved from Perl 5.10.1 to CPAN

#GetOpt::Long Options can now take multiple values at once (experimental)

Getopt::Long upgraded to version 2.35

Removed in Perl 5.8.8

#The pseudo-hash data type

Introduced in Perl 5.6.0

Removed in Perl 5.9.0

#5.005-style threading

Introduced in Perl 5.005

Removed in Perl 5.10

#perlcc

Introduced in Perl 5.005

Moved from Perl 5.9.0 to CPAN

#AUTHORS

brian d foy <brian.d.foy@gmail.com>

Sébastien Aperghis-Tramoni <saper@cpan.org>

#COPYRIGHT

Copyright 2010, brian d foy <brian.d.foy@gmail.com>

#LICENSE

You can use and redistribute this document under the same terms as Perl itself.

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