FM / 5.34.0

/usr/share/perl/5.34.0/

/usr/share/perl/5.34.0

Name	Size	Mode	Actions
App/	-	0755	rm
Archive/	-	0755	rm
Attribute/	-	0755	rm
autodie/	-	0755	rm
B/	-	0755	rm
Carp/	-	0755	rm
Class/	-	0755	rm
Compress/	-	0755	rm
Config/	-	0755	rm
CPAN/	-	0755	rm
DBM_Filter/	-	0755	rm
Devel/	-	0755	rm
Digest/	-	0755	rm
Encode/	-	0755	rm
encoding/	-	0755	rm
Exporter/	-	0755	rm
ExtUtils/	-	0755	rm
File/	-	0755	rm
Filter/	-	0755	rm
Getopt/	-	0755	rm
HTTP/	-	0755	rm
I18N/	-	0755	rm
IO/	-	0755	rm
IPC/	-	0755	rm
JSON/	-	0755	rm
Locale/	-	0755	rm
Math/	-	0755	rm
Memoize/	-	0755	rm
Module/	-	0755	rm
Net/	-	0755	rm
overload/	-	0755	rm
Params/	-	0755	rm
Parse/	-	0755	rm
Perl/	-	0755	rm
PerlIO/	-	0755	rm
Pod/	-	0755	rm
pod/	-	0755	rm
Search/	-	0755	rm
TAP/	-	0755	rm
Term/	-	0755	rm
Test/	-	0755	rm
Test2/	-	0755	rm
Text/	-	0755	rm
Thread/	-	0755	rm
Tie/	-	0755	rm
Time/	-	0755	rm
Unicode/	-	0755	rm
unicore/	-	0755	rm
User/	-	0755	rm
version/	-	0755	rm
warnings/	-	0755	rm
AnyDBM_File.pm	2618	0644	edit dl rm
autodie.pm	12436	0644	edit dl rm
AutoLoader.pm	15797	0644	edit dl rm
AutoSplit.pm	19637	0644	edit dl rm
autouse.pm	4238	0644	edit dl rm
base.pm	10961	0644	edit dl rm
Benchmark.pm	31026	0644	edit dl rm
bigint.pm	23398	0644	edit dl rm
bignum.pm	21137	0644	edit dl rm
bigrat.pm	16154	0644	edit dl rm
blib.pm	2062	0644	edit dl rm
bytes.pm	3782	0644	edit dl rm
bytes_heavy.pl	758	0644	edit dl rm
Carp.pm	35985	0644	edit dl rm
charnames.pm	20931	0644	edit dl rm
constant.pm	14724	0644	edit dl rm
CORE.pod	3188	0644	edit dl rm
CPAN.pm	146520	0644	edit dl rm
DB.pm	18922	0644	edit dl rm
DBM_Filter.pm	14385	0644	edit dl rm
deprecate.pm	5036	0644	edit dl rm
diagnostics.pm	19299	0644	edit dl rm
Digest.pm	11225	0644	edit dl rm
DirHandle.pm	2085	0644	edit dl rm
Dumpvalue.pm	17668	0644	edit dl rm
dumpvar.pl	15555	0644	edit dl rm
English.pm	4761	0644	edit dl rm
Env.pm	5571	0644	edit dl rm
experimental.pm	7600	0644	edit dl rm
Exporter.pm	18774	0644	edit dl rm
Fatal.pm	59085	0644	edit dl rm
feature.pm	22644	0644	edit dl rm
fields.pm	9475	0644	edit dl rm
FileCache.pm	5549	0644	edit dl rm
FileHandle.pm	6784	0644	edit dl rm
filetest.pm	4003	0644	edit dl rm
FindBin.pm	4648	0644	edit dl rm
if.pm	3626	0644	edit dl rm
integer.pm	3254	0644	edit dl rm
Internals.pod	2575	0644	edit dl rm
less.pm	3204	0644	edit dl rm
locale.pm	4885	0644	edit dl rm
Memoize.pm	36192	0644	edit dl rm
meta_notation.pm	2117	0644	edit dl rm
NEXT.pm	18982	0644	edit dl rm
ok.pm	967	0644	edit dl rm
open.pm	8512	0644	edit dl rm
overload.pm	53349	0644	edit dl rm
overloading.pm	1808	0644	edit dl rm
parent.pm	2702	0644	edit dl rm
perl5db.pl	317295	0644	edit dl rm
perlfaq.pm	77	0644	edit dl rm
PerlIO.pm	14441	0644	edit dl rm
Safe.pm	25352	0644	edit dl rm
SelectSaver.pm	1076	0644	edit dl rm
SelfLoader.pm	17686	0644	edit dl rm
sigtrap.pm	8736	0644	edit dl rm
sort.pm	3911	0644	edit dl rm
strict.pm	4783	0644	edit dl rm
subs.pm	945	0644	edit dl rm
Symbol.pm	4905	0644	edit dl rm
Test.pm	30042	0644	edit dl rm
Test2.pm	6393	0644	edit dl rm
Thread.pm	8289	0644	edit dl rm
UNIVERSAL.pm	6594	0644	edit dl rm
utf8.pm	10756	0644	edit dl rm
vars.pm	2458	0644	edit dl rm
version.pm	1976	0644	edit dl rm
version.pod	9832	0644	edit dl rm
vmsish.pm	4313	0644	edit dl rm
warnings.pm	53221	0644	edit dl rm
XSLoader.pm	11252	0644	edit dl rm
_charnames.pm	34151	0644	edit dl rm

Edit: /usr/share/perl/5.34.0/experimental.pm (7600B)

package experimental;
$experimental::VERSION = '0.024';
use strict;
use warnings;
use version ();

BEGIN { eval { require feature } };
use Carp qw/croak carp/;

my %warnings = map { $_ => 1 } grep { /^experimental::/ } keys %warnings::Offsets;
my %features = map { $_ => 1 } $] > 5.015006 ? keys %feature::feature : do {
	my @features;
	if ($] >= 5.010) {
		push @features, qw/switch say state/;
		push @features, 'unicode_strings' if $] > 5.011002;
	}
	@features;
};

my %min_version = (
	array_base      => '5',
	autoderef       => '5.14.0',
	bitwise         => '5.22.0',
	const_attr      => '5.22.0',
	current_sub     => '5.16.0',
	declared_refs   => '5.26.0',
	evalbytes       => '5.16.0',
	fc              => '5.16.0',
	isa             => '5.31.7',
	lexical_topic   => '5.10.0',
	lexical_subs    => '5.18.0',
	postderef       => '5.20.0',
	postderef_qq    => '5.20.0',
	refaliasing     => '5.22.0',
	regex_sets      => '5.18.0',
	say             => '5.10.0',
	smartmatch      => '5.10.0',
	signatures      => '5.20.0',
	state           => '5.10.0',
	switch          => '5.10.0',
	try             => '5.33.6',
	unicode_eval    => '5.16.0',
	unicode_strings => '5.12.0',
);
my %removed_in_version = (
	array_base      => '5.29.4',
	autoderef       => '5.23.1',
	lexical_topic   => '5.23.4',
);

$_ = version->new($_) for values %min_version;
$_ = version->new($_) for values %removed_in_version;

my %additional = (
	postderef     => ['postderef_qq'],
	switch        => ['smartmatch'],
	declared_refs => ['refaliasing'],
);

sub _enable {
	my $pragma = shift;
	if ($warnings{"experimental::$pragma"}) {
		warnings->unimport("experimental::$pragma");
		feature->import($pragma) if exists $features{$pragma};
		_enable(@{ $additional{$pragma} }) if $additional{$pragma};
	}
	elsif ($features{$pragma}) {
		feature->import($pragma);
		_enable(@{ $additional{$pragma} }) if $additional{$pragma};
	}
	elsif (not exists $min_version{$pragma}) {
		croak "Can't enable unknown feature $pragma";
	}
	elsif ($] < $min_version{$pragma}) {
		my $stable = $min_version{$pragma};
		if ($stable->{version}[1] % 2) {
			$stable = version->new(
				"5.".($stable->{version}[1]+1).'.0'
			);
		}
		croak "Need perl $stable or later for feature $pragma";
	}
	elsif ($] >= ($removed_in_version{$pragma} || 7)) {
		croak "Experimental feature $pragma has been removed from perl in version $removed_in_version{$pragma}";
	}
}

sub import {
	my ($self, @pragmas) = @_;

for my $pragma (@pragmas) {
		_enable($pragma);
	}
	return;
}

sub _disable {
	my $pragma = shift;
	if ($warnings{"experimental::$pragma"}) {
		warnings->import("experimental::$pragma");
		feature->unimport($pragma) if exists $features{$pragma};
		_disable(@{ $additional{$pragma} }) if $additional{$pragma};
	}
	elsif ($features{$pragma}) {
		feature->unimport($pragma);
		_disable(@{ $additional{$pragma} }) if $additional{$pragma};
	}
	elsif (not exists $min_version{$pragma}) {
		carp "Can't disable unknown feature $pragma, ignoring";
	}
}

sub unimport {
	my ($self, @pragmas) = @_;

for my $pragma (@pragmas) {
		_disable($pragma);
	}
	return;
}

#ABSTRACT: Experimental features made easy

__END__

=pod

=encoding UTF-8

=head1 NAME

experimental - Experimental features made easy

=head1 VERSION

version 0.024

=head1 SYNOPSIS

use experimental 'lexical_subs', 'smartmatch';
 my sub foo { $_[0] ~~ 1 }

=head1 DESCRIPTION

This pragma provides an easy and convenient way to enable or disable
experimental features.

Every version of perl has some number of features present but considered
"experimental."  For much of the life of Perl 5, this was only a designation
found in the documentation.  Starting in Perl v5.10.0, and more aggressively in
v5.18.0, experimental features were placed behind pragmata used to enable the
feature and disable associated warnings.

The C<experimental> pragma exists to combine the required incantations into a
single interface stable across releases of perl.  For every experimental
feature, this should enable the feature and silence warnings for the enclosing
lexical scope:

use experimental 'feature-name';

To disable the feature and, if applicable, re-enable any warnings, use:

no experimental 'feature-name';

The supported features, documented further below, are:

=over 4

=item * C<array_base> - allow the use of C<$[> to change the starting index of C<@array>.

This is supported on all versions of perl.

=item * C<autoderef> - allow push, each, keys, and other built-ins on references.

This was added in perl 5.14.0 and removed in perl 5.23.1.

=item * C<bitwise> - allow the new stringwise bit operators

This was added in perl 5.22.0.

=item * C<const_attr> - allow the :const attribute on subs

This was added in perl 5.22.0.

=item * C<declared_refs> - enables aliasing via assignment to references

This was added in perl 5.26.0.

=item * C<isa> - allow the use of the C<isa> infix operator

This was added in perl 5.32.0.

=item * C<lexical_topic> - allow the use of lexical C<$_> via C<my $_>.

This was added in perl 5.10.0 and removed in perl 5.23.4.

=item * C<lexical_subs> - allow the use of lexical subroutines.

This was added in 5.18.0.

=item * C<postderef> - allow the use of postfix dereferencing expressions

This was added in perl 5.20.0, and became non-experimental (and always enabled) in 5.24.0.

=item * C<postderef_qq> - allow the use of postfix dereferencing expressions inside interpolating strings

This was added in perl 5.20.0, and became non-experimental (and always enabled) in 5.24.0.

=item * C<re_strict> - enables strict mode in regular expressions

This was added in perl 5.22.0.

=item * C<refaliasing> - allow aliasing via C<\$x = \$y>

This was added in perl 5.22.0.

=item * C<regex_sets> - allow extended bracketed character classes in regexps

This was added in perl 5.18.0.

=item * C<signatures> - allow subroutine signatures (for named arguments)

This was added in perl 5.20.0.

=item * C<smartmatch> - allow the use of C<~~>

This was added in perl 5.10.0, but it should be noted there are significant
incompatibilities between 5.10.0 and 5.10.1.

=item * C<switch> - allow the use of C<~~>, given, and when

This was added in perl 5.10.0.

=item * C<win32_perlio> - allows the use of the :win32 IO layer.

This was added on perl 5.22.0.

=back

=head2 Ordering matters

Using this pragma to 'enable an experimental feature' is another way of saying
that this pragma will disable the warnings which would result from using that
feature.  Therefore, the order in which pragmas are applied is important.  In
particular, you probably want to enable experimental features I<after> you
enable warnings:

use warnings;
  use experimental 'smartmatch';

You also need to take care with modules that enable warnings for you.  A common
example being Moose.  In this example, warnings for the 'smartmatch' feature are
first turned on by the warnings pragma, off by the experimental pragma and back
on again by the Moose module (fix is to switch the last two lines):

use warnings;
  use experimental 'smartmatch';
  use Moose;

=head2 Disclaimer

Because of the nature of the features it enables, forward compatibility can not
be guaranteed in any way.

=head1 SEE ALSO

L<perlexperiment|perlexperiment> contains more information about experimental features.

=head1 AUTHOR

Leon Timmermans <leont@cpan.org>

=head1 COPYRIGHT AND LICENSE

This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.

=cut

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