/usr/share/perl5/Sub/Exporter/Progressive.pm is in libsub-exporter-progressive-perl 0.001011-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 | package Sub::Exporter::Progressive;
use strict;
use warnings;
our $VERSION = '0.001011';
use Carp ();
use List::Util ();
sub import {
my ($self, @args) = @_;
my $inner_target = caller;
my $export_data = sub_export_options($inner_target, @args);
my $full_exporter;
no strict 'refs';
@{"${inner_target}::EXPORT_OK"} = @{$export_data->{exports}};
@{"${inner_target}::EXPORT"} = @{$export_data->{defaults}};
%{"${inner_target}::EXPORT_TAGS"} = %{$export_data->{tags}};
*{"${inner_target}::import"} = sub {
use strict;
my ($self, @args) = @_;
if (List::Util::first { ref || !m/ \A [:-]? \w+ \z /xm } @args) {
Carp::croak 'your usage of Sub::Exporter::Progressive requires Sub::Exporter to be installed'
unless eval { require Sub::Exporter };
$full_exporter ||= Sub::Exporter::build_exporter($export_data->{original});
goto $full_exporter;
} elsif (defined(my $num = List::Util::first { !ref and m/^\d/ } @args)) {
die "cannot export symbols with a leading digit: '$num'";
} else {
require Exporter;
s/ \A - /:/xm for @args;
@_ = ($self, @args);
goto \&Exporter::import;
}
};
return;
}
my $too_complicated = <<'DEATH';
You are using Sub::Exporter::Progressive, but the features your program uses from
Sub::Exporter cannot be implemented without Sub::Exporter, so you might as well
just use vanilla Sub::Exporter
DEATH
sub sub_export_options {
my ($inner_target, $setup, $options) = @_;
my @exports;
my @defaults;
my %tags;
if ($setup eq '-setup') {
my %options = %$options;
OPTIONS:
for my $opt (keys %options) {
if ($opt eq 'exports') {
Carp::croak $too_complicated if ref $options{exports} ne 'ARRAY';
@exports = @{$options{exports}};
Carp::croak $too_complicated if List::Util::first { ref } @exports;
} elsif ($opt eq 'groups') {
%tags = %{$options{groups}};
for my $tagset (values %tags) {
Carp::croak $too_complicated if List::Util::first { / \A - (?! all \b ) /x || ref } @{$tagset};
}
@defaults = @{$tags{default} || [] };
} else {
Carp::croak $too_complicated;
}
}
@{$_} = map { / \A [:-] all \z /x ? @exports : $_ } @{$_} for \@defaults, values %tags;
$tags{all} ||= [ @exports ];
my %exports = map { $_ => 1 } @exports;
my @errors = grep { not $exports{$_} } @defaults;
Carp::croak join(', ', @errors) . " is not exported by the $inner_target module\n" if @errors;
}
return {
exports => \@exports,
defaults => \@defaults,
original => $options,
tags => \%tags,
};
}
1;
=encoding utf8
=head1 NAME
Sub::Exporter::Progressive - Only use Sub::Exporter if you need it
=head1 SYNOPSIS
package Syntax::Keyword::Gather;
use Sub::Exporter::Progressive -setup => {
exports => [qw( break gather gathered take )],
groups => {
default => [qw( break gather gathered take )],
},
};
# elsewhere
# uses Exporter for speed
use Syntax::Keyword::Gather;
# somewhere else
# uses Sub::Exporter for features
use Syntax::Keyword::Gather 'gather', take => { -as => 'grab' };
=head1 DESCRIPTION
L<Sub::Exporter> is an incredibly powerful module, but with that power comes
great responsibility, er- as well as some runtime penalties. This module
is a C<Sub::Exporter> wrapper that will let your users just use L<Exporter>
if all they are doing is picking exports, but use C<Sub::Exporter> if your
users try to use C<Sub::Exporter>'s more advanced features, like
renaming exports, if they try to use them.
Note that this module will export C<@EXPORT>, C<@EXPORT_OK> and
C<%EXPORT_TAGS> package variables for C<Exporter> to work. Additionally, if
your package uses advanced C<Sub::Exporter> features like currying, this module
will only ever use C<Sub::Exporter>, so you might as well use it directly.
=head1 AUTHOR
frew - Arthur Axel Schmidt (cpan:FREW) <frioux+cpan@gmail.com>
=head1 CONTRIBUTORS
ilmari - Dagfinn Ilmari Mannsåker (cpan:ILMARI) <ilmari@ilmari.org>
mst - Matt S. Trout (cpan:MSTROUT) <mst@shadowcat.co.uk>
leont - Leon Timmermans (cpan:LEONT) <leont@cpan.org>
=head1 COPYRIGHT
Copyright (c) 2012 the Sub::Exporter::Progressive L</AUTHOR> and
L</CONTRIBUTORS> as listed above.
=head1 LICENSE
This library is free software and may be distributed under the same terms
as perl itself.
=cut
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