/usr/share/perl5/Object/InsideOut/Chained.pm is in libobject-insideout-perl 3.87-1.
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 | package Object::InsideOut; {
use strict;
use warnings;
no warnings 'redefine';
my $GBL = {};
sub generate_CHAINED :Sub(Private)
{
($GBL) = @_;
my $g_ch = $$GBL{'sub'}{'chain'};
my $chain_td = $$g_ch{'new'}{'td'} || [];
my $chain_bu = $$g_ch{'new'}{'bu'} || [];
delete($$g_ch{'new'});
if (! exists($$g_ch{'td'})) {
$$GBL{'sub'}{'chain'} = {
td => {}, # 'Top down'
bu => {}, # 'Bottom up'
restrict => {}, # :Restricted
};
$g_ch = $$GBL{'sub'}{'chain'};
}
my $ch_td = $$g_ch{'td'};
my $ch_bu = $$g_ch{'bu'};
my $ch_restr = $$g_ch{'restrict'};
# Get names for :CHAINED methods
my (%chain_loc);
while (my $info = shift(@{$chain_td})) {
$$info{'name'} ||= sub_name($$info{'code'}, ':CHAINED', $$info{'loc'});
my $package = $$info{'pkg'};
my $name = $$info{'name'};
$chain_loc{$name}{$package} = $$info{'loc'};
$$ch_td{$name}{$package} = $$info{'wrap'};
if (exists($$info{'exempt'})) {
push(@{$$ch_restr{$package}{$name}},
sort grep {$_} split(/[,'\s]+/, $$info{'exempt'} || ''));
}
}
# Get names for :CHAINED(BOTTOM UP) methods
while (my $info = shift(@{$chain_bu})) {
$$info{'name'} ||= sub_name($$info{'code'}, ':CHAINED(BOTTOM UP)', $$info{'loc'});
my $package = $$info{'pkg'};
my $name = $$info{'name'};
# Check for conflicting definitions of 'name'
if ($$ch_td{$name}) {
foreach my $other_package (keys(%{$$ch_td{$name}})) {
if ($other_package->isa($package) ||
$package->isa($other_package))
{
my ($pkg, $file, $line) = @{$chain_loc{$name}{$other_package}};
my ($pkg2, $file2, $line2) = @{$$info{'loc'}};
OIO::Attribute->die(
'location' => $$info{'loc'},
'message' => "Conflicting definitions for chained method '$name'",
'Info' => "Declared as :CHAINED in class '$pkg' (file '$file', line $line), but declared as :CHAINED(BOTTOM UP) in class '$pkg2' (file '$file2' line $line2)");
}
}
}
$$ch_bu{$name}{$package} = $$info{'wrap'};
if (exists($$info{'exempt'})) {
push(@{$$ch_restr{$package}{$name}},
sort grep {$_} split(/[,'\s]+/, $$info{'exempt'} || ''));
}
}
# Propagate restrictions
my $reapply = 1;
my $trees = $$GBL{'tree'}{'td'};
while ($reapply) {
$reapply = 0;
foreach my $pkg (keys(%{$ch_restr})) {
foreach my $class (keys(%{$trees})) {
next if (! grep { $_ eq $pkg } @{$$trees{$class}});
foreach my $p (@{$$trees{$class}}) {
foreach my $n (keys(%{$$ch_restr{$pkg}})) {
if (exists($$ch_restr{$p}{$n})) {
next if ($$ch_restr{$p}{$n} == $$ch_restr{$pkg}{$n});
my $equal = (@{$$ch_restr{$p}{$n}} == @{$$ch_restr{$pkg}{$n}});
if ($equal) {
for (1..@{$$ch_restr{$p}{$n}}) {
if ($$ch_restr{$pkg}{$n}[$_-1] ne $$ch_restr{$p}{$n}[$_-1]) {
$equal = 0;
last;
}
}
}
if (! $equal) {
my %restr = map { $_ => 1 } @{$$ch_restr{$p}{$n}}, @{$$ch_restr{$pkg}{$n}};
$$ch_restr{$pkg}{$n} = [ sort(keys(%restr)) ];
$reapply = 1;
}
} else {
$reapply = 1;
}
$$ch_restr{$p}{$n} = $$ch_restr{$pkg}{$n};
}
}
}
}
}
no warnings 'redefine';
no strict 'refs';
# Implement :CHAINED methods
foreach my $name (keys(%{$ch_td})) {
my $code = create_CHAINED($name, $trees, $$ch_td{$name});
foreach my $package (keys(%{$$ch_td{$name}})) {
*{$package.'::'.$name} = $code;
add_meta($package, $name, 'kind', 'chained');
if (exists($$ch_restr{$package}{$name})) {
add_meta($package, $name, 'restricted', 1);
}
}
}
# Implement :CHAINED(BOTTOM UP) methods
foreach my $name (keys(%{$ch_bu})) {
my $code = create_CHAINED($name, $$GBL{'tree'}{'bu'}, $$ch_bu{$name});
foreach my $package (keys(%{$$ch_bu{$name}})) {
*{$package.'::'.$name} = $code;
add_meta($package, $name, 'kind', 'chained (bottom up)');
if (exists($$ch_restr{$package}{$name})) {
add_meta($package, $name, 'restricted', 1);
}
}
}
}
# Returns a closure back to initialize() that is used to setup CHAINED
# and CHAINED(BOTTOM UP) methods for a particular method name.
sub create_CHAINED :Sub(Private)
{
# $name - method name
# $tree - either $GBL{'tree'}{'td'} or $GBL{'tree'}{'bu'}
# $code_refs - hash ref by package of code refs for a particular method name
my ($name, $tree, $code_refs) = @_;
return sub {
my $thing = shift;
my $class = ref($thing) || $thing;
if (! $class) {
OIO::Method->die('message' => "Must call '$name' as a method");
}
my @args = @_;
# Caller must be in class hierarchy
my $restr = $$GBL{'sub'}{'chain'}{'restrict'};
if ($restr && exists($$restr{$class}{$name})) {
my $caller = caller();
if (! ((grep { $_ eq $caller } @{$$restr{$class}{$name}}) ||
$caller->isa($class) ||
$class->isa($caller)))
{
OIO::Method->die('message' => "Can't call restricted method '$class->$name' from class '$caller'");
}
}
# Chain results together
foreach my $pkg (@{$$tree{$class}}) {
if (my $code = $$code_refs{$pkg}) {
local $SIG{'__DIE__'} = 'OIO::trap';
@args = $thing->$code(@args);
}
}
# Return results
return (@args);
};
}
} # End of package's lexical scope
# Ensure correct versioning
($Object::InsideOut::VERSION == 3.87)
or die("Version mismatch\n");
# EOF
|