/usr/lib/perl5/Class/MOP/Method/Wrapped.pm is in libmoose-perl 2.0401-1.
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 | package Class::MOP::Method::Wrapped;
BEGIN {
$Class::MOP::Method::Wrapped::AUTHORITY = 'cpan:STEVAN';
}
{
$Class::MOP::Method::Wrapped::VERSION = '2.0401';
}
use strict;
use warnings;
use Carp 'confess';
use Scalar::Util 'blessed';
use base 'Class::MOP::Method';
# NOTE:
# this ugly beast is the result of trying
# to micro optimize this as much as possible
# while not completely loosing maintainability.
# At this point it's "fast enough", after all
# you can't get something for nothing :)
my $_build_wrapped_method = sub {
my $modifier_table = shift;
my ($before, $after, $around) = (
$modifier_table->{before},
$modifier_table->{after},
$modifier_table->{around},
);
if (@$before && @$after) {
$modifier_table->{cache} = sub {
for my $c (@$before) { $c->(@_) };
my @rval;
((defined wantarray) ?
((wantarray) ?
(@rval = $around->{cache}->(@_))
:
($rval[0] = $around->{cache}->(@_)))
:
$around->{cache}->(@_));
for my $c (@$after) { $c->(@_) };
return unless defined wantarray;
return wantarray ? @rval : $rval[0];
}
}
elsif (@$before && !@$after) {
$modifier_table->{cache} = sub {
for my $c (@$before) { $c->(@_) };
return $around->{cache}->(@_);
}
}
elsif (@$after && !@$before) {
$modifier_table->{cache} = sub {
my @rval;
((defined wantarray) ?
((wantarray) ?
(@rval = $around->{cache}->(@_))
:
($rval[0] = $around->{cache}->(@_)))
:
$around->{cache}->(@_));
for my $c (@$after) { $c->(@_) };
return unless defined wantarray;
return wantarray ? @rval : $rval[0];
}
}
else {
$modifier_table->{cache} = $around->{cache};
}
};
sub wrap {
my ( $class, $code, %params ) = @_;
(blessed($code) && $code->isa('Class::MOP::Method'))
|| confess "Can only wrap blessed CODE";
my $modifier_table = {
cache => undef,
orig => $code->body,
before => [],
after => [],
around => {
cache => $code->body,
methods => [],
},
};
$_build_wrapped_method->($modifier_table);
return $class->SUPER::wrap(
sub { $modifier_table->{cache}->(@_) },
# get these from the original
# unless explicitly overriden
package_name => $params{package_name} || $code->package_name,
name => $params{name} || $code->name,
original_method => $code,
modifier_table => $modifier_table,
);
}
sub _new {
my $class = shift;
return Class::MOP::Class->initialize($class)->new_object(@_)
if $class ne __PACKAGE__;
my $params = @_ == 1 ? $_[0] : {@_};
return bless {
# inherited from Class::MOP::Method
'body' => $params->{body},
'associated_metaclass' => $params->{associated_metaclass},
'package_name' => $params->{package_name},
'name' => $params->{name},
'original_method' => $params->{original_method},
# defined in this class
'modifier_table' => $params->{modifier_table}
} => $class;
}
sub get_original_method {
my $code = shift;
$code->original_method;
}
sub add_before_modifier {
my $code = shift;
my $modifier = shift;
unshift @{$code->{'modifier_table'}->{before}} => $modifier;
$_build_wrapped_method->($code->{'modifier_table'});
}
sub before_modifiers {
my $code = shift;
return @{$code->{'modifier_table'}->{before}};
}
sub add_after_modifier {
my $code = shift;
my $modifier = shift;
push @{$code->{'modifier_table'}->{after}} => $modifier;
$_build_wrapped_method->($code->{'modifier_table'});
}
sub after_modifiers {
my $code = shift;
return @{$code->{'modifier_table'}->{after}};
}
{
# NOTE:
# this is another possible candidate for
# optimization as well. There is an overhead
# associated with the currying that, if
# eliminated might make around modifiers
# more manageable.
my $compile_around_method = sub {{
my $f1 = pop;
return $f1 unless @_;
my $f2 = pop;
push @_, sub { $f2->( $f1, @_ ) };
redo;
}};
sub add_around_modifier {
my $code = shift;
my $modifier = shift;
unshift @{$code->{'modifier_table'}->{around}->{methods}} => $modifier;
$code->{'modifier_table'}->{around}->{cache} = $compile_around_method->(
@{$code->{'modifier_table'}->{around}->{methods}},
$code->{'modifier_table'}->{orig}
);
$_build_wrapped_method->($code->{'modifier_table'});
}
}
sub around_modifiers {
my $code = shift;
return @{$code->{'modifier_table'}->{around}->{methods}};
}
sub _make_compatible_with {
my $self = shift;
my ($other) = @_;
# XXX: this is pretty gross. the issue here is that CMOP::Method::Wrapped
# objects are subclasses of CMOP::Method, but when we get to moose, they'll
# need to be compatible with Moose::Meta::Method, which isn't possible. the
# right solution here is to make ::Wrapped into a role that gets applied to
# whatever the method_metaclass happens to be and get rid of
# wrapped_method_metaclass entirely, but that's not going to happen until
# we ditch cmop and get roles into the bootstrapping, so. i'm not
# maintaining the previous behavior of turning them into instances of the
# new method_metaclass because that's equally broken, and at least this way
# any issues will at least be detectable and potentially fixable. -doy
return $self unless $other->_is_compatible_with($self->_real_ref_name);
return $self->SUPER::_make_compatible_with(@_);
}
1;
# ABSTRACT: Method Meta Object for methods with before/after/around modifiers
=pod
=head1 NAME
Class::MOP::Method::Wrapped - Method Meta Object for methods with before/after/around modifiers
=head1 VERSION
version 2.0401
=head1 DESCRIPTION
This is a L<Class::MOP::Method> subclass which implements before,
after, and around method modifiers.
=head1 METHODS
=head2 Construction
=over 4
=item B<< Class::MOP::Method::Wrapped->wrap($metamethod, %options) >>
This is the constructor. It accepts a L<Class::MOP::Method> object and
a hash of options.
The options are:
=over 8
=item * name
The method name (without a package name). This will be taken from the
provided L<Class::MOP::Method> object if it is not provided.
=item * package_name
The package name for the method. This will be taken from the provided
L<Class::MOP::Method> object if it is not provided.
=item * associated_metaclass
An optional L<Class::MOP::Class> object. This is the metaclass for the
method's class.
=back
=item B<< $metamethod->get_original_method >>
This returns the L<Class::MOP::Method> object that was passed to the
constructor.
=item B<< $metamethod->add_before_modifier($code) >>
=item B<< $metamethod->add_after_modifier($code) >>
=item B<< $metamethod->add_around_modifier($code) >>
These methods all take a subroutine reference and apply it as a
modifier to the original method.
=item B<< $metamethod->before_modifiers >>
=item B<< $metamethod->after_modifiers >>
=item B<< $metamethod->around_modifiers >>
These methods all return a list of subroutine references which are
acting as the specified type of modifier.
=back
=head1 AUTHOR
Moose is maintained by the Moose Cabal, along with the help of many contributors. See L<Moose/CABAL> and L<Moose/CONTRIBUTORS> for details.
=head1 COPYRIGHT AND LICENSE
This software is copyright (c) 2011 by Infinity Interactive, Inc..
This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.
=cut
__END__
|