/usr/share/perl/5.18.2/Exporter.pm is in perl-base 5.18.2-2ubuntu1.
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 | package Exporter;
require 5.006;
# Be lean.
#use strict;
#no strict 'refs';
our $Debug = 0;
our $ExportLevel = 0;
our $Verbose ||= 0;
our $VERSION = '5.68';
our (%Cache);
sub as_heavy {
require Exporter::Heavy;
# Unfortunately, this does not work if the caller is aliased as *name = \&foo
# Thus the need to create a lot of identical subroutines
my $c = (caller(1))[3];
$c =~ s/.*:://;
\&{"Exporter::Heavy::heavy_$c"};
}
sub export {
goto &{as_heavy()};
}
sub import {
my $pkg = shift;
my $callpkg = caller($ExportLevel);
if ($pkg eq "Exporter" and @_ and $_[0] eq "import") {
*{$callpkg."::import"} = \&import;
return;
}
# We *need* to treat @{"$pkg\::EXPORT_FAIL"} since Carp uses it :-(
my $exports = \@{"$pkg\::EXPORT"};
# But, avoid creating things if they don't exist, which saves a couple of
# hundred bytes per package processed.
my $fail = ${$pkg . '::'}{EXPORT_FAIL} && \@{"$pkg\::EXPORT_FAIL"};
return export $pkg, $callpkg, @_
if $Verbose or $Debug or $fail && @$fail > 1;
my $export_cache = ($Cache{$pkg} ||= {});
my $args = @_ or @_ = @$exports;
if ($args and not %$export_cache) {
s/^&//, $export_cache->{$_} = 1
foreach (@$exports, @{"$pkg\::EXPORT_OK"});
}
my $heavy;
# Try very hard not to use {} and hence have to enter scope on the foreach
# We bomb out of the loop with last as soon as heavy is set.
if ($args or $fail) {
($heavy = (/\W/ or $args and not exists $export_cache->{$_}
or $fail and @$fail and $_ eq $fail->[0])) and last
foreach (@_);
} else {
($heavy = /\W/) and last
foreach (@_);
}
return export $pkg, $callpkg, ($args ? @_ : ()) if $heavy;
local $SIG{__WARN__} =
sub {require Carp; &Carp::carp} if not $SIG{__WARN__};
# shortcut for the common case of no type character
*{"$callpkg\::$_"} = \&{"$pkg\::$_"} foreach @_;
}
# Default methods
sub export_fail {
my $self = shift;
@_;
}
# Unfortunately, caller(1)[3] "does not work" if the caller is aliased as
# *name = \&foo. Thus the need to create a lot of identical subroutines
# Otherwise we could have aliased them to export().
sub export_to_level {
goto &{as_heavy()};
}
sub export_tags {
goto &{as_heavy()};
}
sub export_ok_tags {
goto &{as_heavy()};
}
sub require_version {
goto &{as_heavy()};
}
1;
__END__
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