/usr/share/perl5/JE/Undefined.pm is in libje-perl 0.056-1.
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 | package JE::Undefined;
our $VERSION = '0.056';
use strict;
use warnings;
use overload fallback => 1,
'""' => 'typeof',
# cmp => sub { "$_[0]" cmp $_[1] },
bool => \&value,
'0+' => sub { sin 9**9**9 };
# ~~~ How should this numify?
require JE::String;
require JE::Boolean;
=head1 NAME
JE::Undefined - JavaScript undefined value
=head1 SYNOPSIS
use JE;
$j = new JE;
$js_undefined = $j->undef;
$js_undefined->value; # undef
=head1 DESCRIPTION
This class implements the JavaScript "undefined" type. There really
isn't much to it.
Undefined stringifies to 'undefined', and is false as a boolean.
=cut
# A JE::Undefined object is a reference to a global object.
sub new { bless \do{my $thing = $_[1]}, $_[0] }
sub value { undef }
sub typeof { 'undefined' }
sub id { 'undef' }
sub primitive { 1 }
sub to_primitive { $_[0] }
sub to_boolean { JE::Boolean->new(${+shift}, 0) }
sub to_string { JE::String->_new(${+shift}, 'undefined') };
sub to_number { JE::Number->new(${+shift}, 'NaN') }
sub global { ${$_[0]} }
return "undef";
__END__
=head1 SEE ALSO
=over 4
=item JE::Types
=item JE::Null
=item JE
|