/usr/share/perl5/Object/InsideOut/Universal.pm is in libobject-insideout-perl 4.02-1.
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 | package Object::InsideOut; {
use strict;
use warnings;
no warnings 'redefine';
# Install versions of UNIVERSAL::can/isa that understands :Automethod and
# foreign inheritance
sub install_UNIVERSAL
{
my ($GBL) = @_;
*Object::InsideOut::can = sub
{
my ($thing, $method) = @_;
return if (! defined($thing));
# Metadata call for methods
if (@_ == 1) {
my $meths = Object::InsideOut::meta(shift)->get_methods();
return (wantarray()) ? (keys(%$meths)) : [ keys(%$meths) ];
}
return if (! defined($method));
# First, try the original UNIVERSAL::can()
my $code;
if ($method =~ /^SUPER::/) {
# Superclass WRT caller
my $caller = caller();
eval { $code = $thing->Object::InsideOut::SUPER::can($caller.'::'.$method) };
} else {
eval { $code = $thing->Object::InsideOut::SUPER::can($method) };
}
if ($code) {
return ($code);
}
# Handle various calling methods
my ($class, $super);
if ($method !~ /::/) {
# Ordinary method check
# $obj->can('x');
$class = ref($thing) || $thing;
} elsif ($method !~ /SUPER::/) {
# Fully-qualified method check
# $obj->can('FOO::x');
($class, $method) = $method =~ /^(.+)::([^:]+)$/;
} elsif ($method =~ /^SUPER::/) {
# Superclass method check
# $obj->can('SUPER::x');
$class = caller();
$method =~ s/SUPER:://;
$super = 1;
} else {
# Qualified superclass method check
# $obj->can('Foo::SUPER::x');
($class, $method) = $method =~ /^(.+)::SUPER::([^:]+)$/;
$super = 1;
}
my $heritage = $$GBL{'heritage'};
my $automethods = $$GBL{'sub'}{'auto'};
# Next, check with heritage objects and Automethods
my ($code_type, $code_dir, %code_refs);
foreach my $pkg (@{$$GBL{'tree'}{'bu'}{$class}}) {
# Skip self's class if SUPER
if ($super && $class eq $pkg) {
next;
}
# Check heritage
if (exists($$heritage{$pkg})) {
no warnings;
foreach my $pkg2 (keys(%{$$heritage{$pkg}{'cl'}})) {
if ($code = $pkg2->can($method)) {
return ($code);
}
}
}
# Check with the Automethods
if (my $automethod = $$automethods{$pkg}) {
# Call the Automethod to get a code ref
local $CALLER::_ = $_;
local $_ = $method;
local $SIG{'__DIE__'} = 'OIO::trap';
if (my ($code, $ctype) = $automethod->($thing)) {
if (ref($code) ne 'CODE') {
# Not a code ref
OIO::Code->die(
'message' => ':Automethod did not return a code ref',
'Info' => ":Automethod in package '$pkg' invoked for method '$method'");
}
if (defined($ctype)) {
my ($type, $dir) = $ctype =~ /(\w+)(?:[(]\s*(.*)\s*[)])?/;
if ($type && $type =~ /CUM/i) {
if ($code_type) {
$type = ':Cumulative';
$dir = ($dir && $dir =~ /BOT/i) ? 'bottom up' : 'top down';
if ($code_type ne $type || $code_dir ne $dir) {
# Mixed types
my ($pkg2) = keys(%code_refs);
OIO::Code->die(
'message' => 'Inconsistent code types returned by :Automethods',
'Info' => "Class '$pkg' returned type $type($dir), and class '$pkg2' returned type $code_type($code_dir)");
}
} else {
$code_type = ':Cumulative';
$code_dir = ($dir && $dir =~ /BOT/i) ? 'bottom up' : 'top down';
}
$code_refs{$pkg} = $code;
next;
}
if ($type && $type =~ /CHA/i) {
if ($code_type) {
$type = ':Chained';
$dir = ($dir && $dir =~ /BOT/i) ? 'bottom up' : 'top down';
if ($code_type ne $type || $code_dir ne $dir) {
# Mixed types
my ($pkg2) = keys(%code_refs);
OIO::Code->die(
'message' => 'Inconsistent code types returned by :Automethods',
'Info' => "Class '$pkg' returned type $type($dir), and class '$pkg2' returned type $code_type($code_dir)");
}
} else {
$code_type = ':Chained';
$code_dir = ($dir && $dir =~ /BOT/i) ? 'bottom up' : 'top down';
}
$code_refs{$pkg} = $code;
next;
}
# Unknown automethod code type
OIO::Code->die(
'message' => "Unknown :Automethod code type: $ctype",
'Info' => ":Automethod in package '$pkg' invoked for method '$method'");
}
if ($code_type) {
# Mixed types
my ($pkg2) = keys(%code_refs);
OIO::Code->die(
'message' => 'Inconsistent code types returned by :Automethods',
'Info' => "Class '$pkg' returned an 'execute immediately' type, and class '$pkg2' returned type $code_type($code_dir)");
}
# Just a one-shot - return it
return ($code);
}
}
}
if ($code_type) {
my $tree = ($code_dir eq 'bottom up') ? $$GBL{'tree'}{'bu'} : $$GBL{'tree'}{'td'};
$code = ($code_type eq ':Cumulative')
? create_CUMULATIVE($method, $tree, \%code_refs)
: create_CHAINED($method, $tree, \%code_refs);
return ($code);
}
return; # Can't
};
*Object::InsideOut::isa = sub
{
my ($thing, $type) = @_;
return ('') if (! defined($thing));
# Metadata call for classes
if (@_ == 1) {
return Object::InsideOut::meta($thing)->get_classes();
}
# Workaround for Perl bug #47233
return ('') if (! defined($type));
# Try original UNIVERSAL::isa()
if (my $isa = eval { $thing->Object::InsideOut::SUPER::isa($type) }) {
return ($isa);
}
# Next, check heritage
foreach my $pkg (@{$$GBL{'tree'}{'bu'}{ref($thing) || $thing}}) {
if (exists($$GBL{'heritage'}{$pkg})) {
foreach my $pkg (keys(%{$$GBL{'heritage'}{$pkg}{'cl'}})) {
if (my $isa = $pkg->isa($type)) {
return ($isa);
}
}
}
}
return (''); # Isn't
};
# Stub ourself out
*Object::InsideOut::install_UNIVERSAL = sub { };
}
} # End of package's lexical scope
# Ensure correct versioning
($Object::InsideOut::VERSION eq '4.02')
or die("Version mismatch\n");
# EOF
|