/usr/share/perl5/Sub/Info.pm is in libsub-info-perl 0.002-1.
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 | package Sub::Info;
use strict;
use warnings;
our $VERSION = '0.002';
use Carp qw/croak/;
use B();
use Importer Importer => 'import';
our @EXPORT_OK = qw{ sub_info };
sub sub_info {
my ($sub, @all_lines) = @_;
my %in = map {$_ => 1} @all_lines;
croak "sub_info requires a coderef as its first argument"
unless ref($sub) eq 'CODE';
my $cobj = B::svref_2object($sub);
my $name = $cobj->GV->NAME;
my $file = $cobj->FILE;
my $package = $cobj->GV->STASH->NAME;
my $op = $cobj->START;
while ($op) {
push @all_lines => $op->line if $op->can('line');
last unless $op->can('next');
$op = $op->next;
}
my ($start, $end, @lines);
if (@all_lines) {
@all_lines = sort { $a <=> $b } @all_lines;
($start, $end) = ($all_lines[0], $all_lines[-1]);
# Adjust start and end for the most common case of a multi-line block with
# parens on the lines before and after.
if ($start < $end) {
$start-- unless $start <= 1 || $in{$start};
$end++ unless $in{$end};
}
@lines = ($start, $end);
}
return {
ref => $sub,
cobj => $cobj,
name => $name,
file => $file,
package => $package,
start_line => $start,
end_line => $end,
all_lines => \@all_lines,
lines => \@lines,
};
}
1;
__END__
=pod
=encoding UTF-8
=head1 NAME
Sub::Info - Tool for inspecting subroutines.
=head1 DESCRIPTION
Tool to inspect subroutines.
=head1 EXPORTS
All exports are optional, you must specify subs to import.
=over 4
=item my $hr = sub_info(\&code)
=item my $hr = sub_info(\&code, @line_numbers)
This returns a hashref with information about the sub:
{
ref => \&code,
cobj => $cobj,
name => "Some::Mod::code",
file => "Some/Mod.pm",
package => "Some::Mod",
# Note: These have been adjusted based on guesswork.
start_line => 22,
end_line => 42,
lines => [22, 42],
# Not a bug, these lines are different!
all_lines => [23, 25, ..., 39, 41],
};
=over 4
=item $info->{ref} => \&code
This is the original sub passed to C<sub_info()>.
=item $info->{cobj} => $cobj
This is the c-object representation of the coderef.
=item $info->{name} => "Some::Mod::code"
This is the name of the coderef. For anonymous coderefs this may end with
C<'__ANON__'>. Also note that the package 'main' is special, and 'main::' may
be omitted.
=item $info->{file} => "Some/Mod.pm"
The file in which the sub was defined.
=item $info->{package} => "Some::Mod"
The package in which the sub was defined.
=item $info->{start_line} => 22
=item $info->{end_line} => 42
=item $info->{lines} => [22, 42]
These three fields are the I<adjusted> start line, end line, and array with both.
It is important to note that these lines have been adjusted and may not be
accurate.
The lines are obtained by walking the ops. As such, the first line is the line
of the first statement, and the last line is the line of the last statement.
This means that in multi-line subs the lines are usually off by 1. The lines
in these keys will be adjusted for you if it detects a multi-line sub.
=item $info->{all_lines} => [23, 25, ..., 39, 41]
This is an array with the lines of every statement in the sub. Unlike the other
line fields, these have not been adjusted for you.
=back
=back
=head1 SOURCE
The source code repository for Sub-Info can be found at
F<http://github.com/exodist/Sub-Info/>.
=head1 MAINTAINERS
=over 4
=item Chad Granum E<lt>exodist@cpan.orgE<gt>
=back
=head1 AUTHORS
=over 4
=item Chad Granum E<lt>exodist@cpan.orgE<gt>
=item Kent Fredric E<lt>kentnl@cpan.orgE<gt>
=back
=head1 COPYRIGHT
Copyright 2016 Chad Granum E<lt>exodist@cpan.orgE<gt>.
This program is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.
See F<http://dev.perl.org/licenses/>
=cut
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