Commit | Line | Data |
38bf2a25 |
1 | |
2 | package Class::MOP; |
3 | |
4 | use strict; |
5 | use warnings; |
6 | |
7 | use 5.008; |
8 | |
9 | use MRO::Compat; |
10 | |
11 | use Carp 'confess'; |
12 | use Scalar::Util 'weaken', 'isweak', 'reftype', 'blessed'; |
13 | use Data::OptList; |
14 | use Try::Tiny; |
15 | |
16 | use Class::MOP::Mixin::AttributeCore; |
17 | use Class::MOP::Mixin::HasAttributes; |
18 | use Class::MOP::Mixin::HasMethods; |
19 | use Class::MOP::Class; |
20 | use Class::MOP::Attribute; |
21 | use Class::MOP::Method; |
22 | |
23 | BEGIN { |
24 | *IS_RUNNING_ON_5_10 = ($] < 5.009_005) |
25 | ? sub () { 0 } |
26 | : sub () { 1 }; |
27 | |
28 | # this is either part of core or set up appropriately by MRO::Compat |
29 | *check_package_cache_flag = \&mro::get_pkg_gen; |
30 | } |
31 | |
38bf2a25 |
32 | XSLoader::load( |
33 | 'Moose', |
202b6e57 |
34 | $Class::MOP::{VERSION} ? ${ $Class::MOP::{VERSION} } : () |
38bf2a25 |
35 | ); |
36 | |
37 | { |
38 | # Metaclasses are singletons, so we cache them here. |
39 | # there is no need to worry about destruction though |
40 | # because they should die only when the program dies. |
41 | # After all, do package definitions even get reaped? |
42 | # Anonymous classes manage their own destruction. |
43 | my %METAS; |
44 | |
45 | sub get_all_metaclasses { %METAS } |
46 | sub get_all_metaclass_instances { values %METAS } |
47 | sub get_all_metaclass_names { keys %METAS } |
48 | sub get_metaclass_by_name { $METAS{$_[0]} } |
49 | sub store_metaclass_by_name { $METAS{$_[0]} = $_[1] } |
50 | sub weaken_metaclass { weaken($METAS{$_[0]}) } |
51 | sub metaclass_is_weak { isweak($METAS{$_[0]}) } |
52 | sub does_metaclass_exist { exists $METAS{$_[0]} && defined $METAS{$_[0]} } |
53 | sub remove_metaclass_by_name { delete $METAS{$_[0]}; return } |
54 | |
55 | # This handles instances as well as class names |
56 | sub class_of { |
57 | return unless defined $_[0]; |
58 | my $class = blessed($_[0]) || $_[0]; |
59 | return $METAS{$class}; |
60 | } |
61 | |
62 | # NOTE: |
63 | # We only cache metaclasses, meaning instances of |
64 | # Class::MOP::Class. We do not cache instance of |
65 | # Class::MOP::Package or Class::MOP::Module. Mostly |
66 | # because I don't yet see a good reason to do so. |
67 | } |
68 | |
69 | sub _class_to_pmfile { |
70 | my $class = shift; |
71 | |
72 | my $file = $class . '.pm'; |
73 | $file =~ s{::}{/}g; |
74 | |
75 | return $file; |
76 | } |
77 | |
78 | sub load_first_existing_class { |
79 | my $classes = Data::OptList::mkopt(\@_) |
80 | or return; |
81 | |
82 | foreach my $class (@{ $classes }) { |
83 | my $name = $class->[0]; |
84 | unless ( _is_valid_class_name($name) ) { |
85 | my $display = defined($name) ? $name : 'undef'; |
86 | confess "Invalid class name ($display)"; |
87 | } |
88 | } |
89 | |
90 | my $found; |
91 | my %exceptions; |
92 | |
93 | for my $class (@{ $classes }) { |
94 | my ($name, $options) = @{ $class }; |
95 | |
96 | if ($options) { |
97 | return $name if is_class_loaded($name, $options); |
98 | if (is_class_loaded($name)) { |
99 | # we already know it's loaded and too old, but we call |
100 | # ->VERSION anyway to generate the exception for us |
101 | $name->VERSION($options->{-version}); |
102 | } |
103 | } |
104 | else { |
105 | return $name if is_class_loaded($name); |
106 | } |
107 | |
108 | my $file = _class_to_pmfile($name); |
109 | return $name if try { |
110 | local $SIG{__DIE__}; |
111 | require $file; |
112 | $name->VERSION($options->{-version}) |
113 | if defined $options->{-version}; |
114 | return 1; |
115 | } |
116 | catch { |
117 | unless (/^Can't locate \Q$file\E in \@INC/) { |
118 | confess "Couldn't load class ($name) because: $_"; |
119 | } |
120 | |
121 | return; |
122 | }; |
123 | } |
124 | |
125 | if ( @{ $classes } > 1 ) { |
126 | my @list = map { $_->[0] } @{ $classes }; |
127 | confess "Can't locate any of @list in \@INC (\@INC contains: @INC)."; |
128 | } else { |
129 | confess "Can't locate " . _class_to_pmfile($classes->[0]->[0]) . " in \@INC (\@INC contains: @INC)."; |
130 | } |
131 | } |
132 | |
133 | sub load_class { |
134 | load_first_existing_class($_[0], ref $_[1] ? $_[1] : ()); |
135 | |
136 | # This is done to avoid breaking code which checked the return value. Said |
137 | # code is dumb. The return value was _always_ true, since it dies on |
138 | # failure! |
139 | return 1; |
140 | } |
141 | |
142 | sub _is_valid_class_name { |
143 | my $class = shift; |
144 | |
145 | return 0 if ref($class); |
146 | return 0 unless defined($class); |
147 | return 0 unless length($class); |
148 | |
149 | return 1 if $class =~ /^\w+(?:::\w+)*$/; |
150 | |
151 | return 0; |
152 | } |
153 | |
dc2b7cc8 |
154 | sub _definition_context { |
155 | my %context; |
156 | @context{qw(package file line)} = caller(1); |
157 | |
158 | return ( |
159 | definition_context => \%context, |
160 | ); |
161 | } |
162 | |
38bf2a25 |
163 | ## ---------------------------------------------------------------------------- |
164 | ## Setting up our environment ... |
165 | ## ---------------------------------------------------------------------------- |
166 | ## Class::MOP needs to have a few things in the global perl environment so |
167 | ## that it can operate effectively. Those things are done here. |
168 | ## ---------------------------------------------------------------------------- |
169 | |
170 | # ... nothing yet actually ;) |
171 | |
172 | ## ---------------------------------------------------------------------------- |
173 | ## Bootstrapping |
174 | ## ---------------------------------------------------------------------------- |
175 | ## The code below here is to bootstrap our MOP with itself. This is also |
176 | ## sometimes called "tying the knot". By doing this, we make it much easier |
177 | ## to extend the MOP through subclassing and such since now you can use the |
178 | ## MOP itself to extend itself. |
179 | ## |
180 | ## Yes, I know, thats weird and insane, but it's a good thing, trust me :) |
181 | ## ---------------------------------------------------------------------------- |
182 | |
183 | # We need to add in the meta-attributes here so that |
184 | # any subclass of Class::MOP::* will be able to |
185 | # inherit them using _construct_instance |
186 | |
187 | ## -------------------------------------------------------- |
188 | ## Class::MOP::Mixin::HasMethods |
189 | |
190 | Class::MOP::Mixin::HasMethods->meta->add_attribute( |
191 | Class::MOP::Attribute->new('_methods' => ( |
192 | reader => { |
193 | # NOTE: |
194 | # we just alias the original method |
195 | # rather than re-produce it here |
196 | '_method_map' => \&Class::MOP::Mixin::HasMethods::_method_map |
197 | }, |
dc2b7cc8 |
198 | default => sub { {} }, |
199 | _definition_context(), |
38bf2a25 |
200 | )) |
201 | ); |
202 | |
203 | Class::MOP::Mixin::HasMethods->meta->add_attribute( |
204 | Class::MOP::Attribute->new('method_metaclass' => ( |
205 | reader => { |
206 | # NOTE: |
207 | # we just alias the original method |
208 | # rather than re-produce it here |
209 | 'method_metaclass' => \&Class::MOP::Mixin::HasMethods::method_metaclass |
210 | }, |
211 | default => 'Class::MOP::Method', |
dc2b7cc8 |
212 | _definition_context(), |
38bf2a25 |
213 | )) |
214 | ); |
215 | |
216 | Class::MOP::Mixin::HasMethods->meta->add_attribute( |
217 | Class::MOP::Attribute->new('wrapped_method_metaclass' => ( |
218 | reader => { |
219 | # NOTE: |
220 | # we just alias the original method |
221 | # rather than re-produce it here |
222 | 'wrapped_method_metaclass' => \&Class::MOP::Mixin::HasMethods::wrapped_method_metaclass |
223 | }, |
224 | default => 'Class::MOP::Method::Wrapped', |
dc2b7cc8 |
225 | _definition_context(), |
38bf2a25 |
226 | )) |
227 | ); |
228 | |
229 | ## -------------------------------------------------------- |
230 | ## Class::MOP::Mixin::HasMethods |
231 | |
232 | Class::MOP::Mixin::HasAttributes->meta->add_attribute( |
233 | Class::MOP::Attribute->new('attributes' => ( |
234 | reader => { |
235 | # NOTE: we need to do this in order |
236 | # for the instance meta-object to |
237 | # not fall into meta-circular death |
238 | # |
239 | # we just alias the original method |
240 | # rather than re-produce it here |
241 | '_attribute_map' => \&Class::MOP::Mixin::HasAttributes::_attribute_map |
242 | }, |
dc2b7cc8 |
243 | default => sub { {} }, |
244 | _definition_context(), |
38bf2a25 |
245 | )) |
246 | ); |
247 | |
248 | Class::MOP::Mixin::HasAttributes->meta->add_attribute( |
249 | Class::MOP::Attribute->new('attribute_metaclass' => ( |
250 | reader => { |
251 | # NOTE: |
252 | # we just alias the original method |
253 | # rather than re-produce it here |
254 | 'attribute_metaclass' => \&Class::MOP::Mixin::HasAttributes::attribute_metaclass |
255 | }, |
256 | default => 'Class::MOP::Attribute', |
dc2b7cc8 |
257 | _definition_context(), |
38bf2a25 |
258 | )) |
259 | ); |
260 | |
261 | ## -------------------------------------------------------- |
262 | ## Class::MOP::Package |
263 | |
264 | Class::MOP::Package->meta->add_attribute( |
265 | Class::MOP::Attribute->new('package' => ( |
266 | reader => { |
267 | # NOTE: we need to do this in order |
268 | # for the instance meta-object to |
269 | # not fall into meta-circular death |
270 | # |
271 | # we just alias the original method |
272 | # rather than re-produce it here |
273 | 'name' => \&Class::MOP::Package::name |
274 | }, |
dc2b7cc8 |
275 | _definition_context(), |
38bf2a25 |
276 | )) |
277 | ); |
278 | |
279 | Class::MOP::Package->meta->add_attribute( |
280 | Class::MOP::Attribute->new('namespace' => ( |
281 | reader => { |
282 | # NOTE: |
283 | # we just alias the original method |
284 | # rather than re-produce it here |
285 | 'namespace' => \&Class::MOP::Package::namespace |
286 | }, |
287 | init_arg => undef, |
dc2b7cc8 |
288 | default => sub { \undef }, |
289 | _definition_context(), |
38bf2a25 |
290 | )) |
291 | ); |
292 | |
293 | ## -------------------------------------------------------- |
294 | ## Class::MOP::Module |
295 | |
296 | # NOTE: |
297 | # yeah this is kind of stretching things a bit, |
298 | # but truthfully the version should be an attribute |
299 | # of the Module, the weirdness comes from having to |
300 | # stick to Perl 5 convention and store it in the |
301 | # $VERSION package variable. Basically if you just |
302 | # squint at it, it will look how you want it to look. |
303 | # Either as a package variable, or as a attribute of |
304 | # the metaclass, isn't abstraction great :) |
305 | |
306 | Class::MOP::Module->meta->add_attribute( |
307 | Class::MOP::Attribute->new('version' => ( |
308 | reader => { |
309 | # NOTE: |
310 | # we just alias the original method |
311 | # rather than re-produce it here |
312 | 'version' => \&Class::MOP::Module::version |
313 | }, |
314 | init_arg => undef, |
dc2b7cc8 |
315 | default => sub { \undef }, |
316 | _definition_context(), |
38bf2a25 |
317 | )) |
318 | ); |
319 | |
320 | # NOTE: |
321 | # By following the same conventions as version here, |
322 | # we are opening up the possibility that people can |
323 | # use the $AUTHORITY in non-Class::MOP modules as |
324 | # well. |
325 | |
326 | Class::MOP::Module->meta->add_attribute( |
327 | Class::MOP::Attribute->new('authority' => ( |
328 | reader => { |
329 | # NOTE: |
330 | # we just alias the original method |
331 | # rather than re-produce it here |
332 | 'authority' => \&Class::MOP::Module::authority |
333 | }, |
334 | init_arg => undef, |
dc2b7cc8 |
335 | default => sub { \undef }, |
336 | _definition_context(), |
38bf2a25 |
337 | )) |
338 | ); |
339 | |
340 | ## -------------------------------------------------------- |
341 | ## Class::MOP::Class |
342 | |
343 | Class::MOP::Class->meta->add_attribute( |
344 | Class::MOP::Attribute->new('superclasses' => ( |
345 | accessor => { |
346 | # NOTE: |
347 | # we just alias the original method |
348 | # rather than re-produce it here |
349 | 'superclasses' => \&Class::MOP::Class::superclasses |
350 | }, |
351 | init_arg => undef, |
dc2b7cc8 |
352 | default => sub { \undef }, |
353 | _definition_context(), |
38bf2a25 |
354 | )) |
355 | ); |
356 | |
357 | Class::MOP::Class->meta->add_attribute( |
358 | Class::MOP::Attribute->new('instance_metaclass' => ( |
359 | reader => { |
360 | # NOTE: we need to do this in order |
361 | # for the instance meta-object to |
362 | # not fall into meta-circular death |
363 | # |
364 | # we just alias the original method |
365 | # rather than re-produce it here |
366 | 'instance_metaclass' => \&Class::MOP::Class::instance_metaclass |
367 | }, |
368 | default => 'Class::MOP::Instance', |
dc2b7cc8 |
369 | _definition_context(), |
38bf2a25 |
370 | )) |
371 | ); |
372 | |
373 | Class::MOP::Class->meta->add_attribute( |
374 | Class::MOP::Attribute->new('immutable_trait' => ( |
375 | reader => { |
376 | 'immutable_trait' => \&Class::MOP::Class::immutable_trait |
377 | }, |
378 | default => "Class::MOP::Class::Immutable::Trait", |
dc2b7cc8 |
379 | _definition_context(), |
38bf2a25 |
380 | )) |
381 | ); |
382 | |
383 | Class::MOP::Class->meta->add_attribute( |
384 | Class::MOP::Attribute->new('constructor_name' => ( |
385 | reader => { |
386 | 'constructor_name' => \&Class::MOP::Class::constructor_name, |
387 | }, |
388 | default => "new", |
dc2b7cc8 |
389 | _definition_context(), |
38bf2a25 |
390 | )) |
391 | ); |
392 | |
393 | Class::MOP::Class->meta->add_attribute( |
394 | Class::MOP::Attribute->new('constructor_class' => ( |
395 | reader => { |
396 | 'constructor_class' => \&Class::MOP::Class::constructor_class, |
397 | }, |
398 | default => "Class::MOP::Method::Constructor", |
dc2b7cc8 |
399 | _definition_context(), |
38bf2a25 |
400 | )) |
401 | ); |
402 | |
403 | |
404 | Class::MOP::Class->meta->add_attribute( |
405 | Class::MOP::Attribute->new('destructor_class' => ( |
406 | reader => { |
407 | 'destructor_class' => \&Class::MOP::Class::destructor_class, |
408 | }, |
dc2b7cc8 |
409 | _definition_context(), |
38bf2a25 |
410 | )) |
411 | ); |
412 | |
413 | # NOTE: |
414 | # we don't actually need to tie the knot with |
415 | # Class::MOP::Class here, it is actually handled |
416 | # within Class::MOP::Class itself in the |
417 | # _construct_class_instance method. |
418 | |
419 | ## -------------------------------------------------------- |
420 | ## Class::MOP::Mixin::AttributeCore |
421 | Class::MOP::Mixin::AttributeCore->meta->add_attribute( |
422 | Class::MOP::Attribute->new('name' => ( |
423 | reader => { |
424 | # NOTE: we need to do this in order |
425 | # for the instance meta-object to |
426 | # not fall into meta-circular death |
427 | # |
428 | # we just alias the original method |
429 | # rather than re-produce it here |
430 | 'name' => \&Class::MOP::Mixin::AttributeCore::name |
dc2b7cc8 |
431 | }, |
432 | _definition_context(), |
38bf2a25 |
433 | )) |
434 | ); |
435 | |
436 | Class::MOP::Mixin::AttributeCore->meta->add_attribute( |
437 | Class::MOP::Attribute->new('accessor' => ( |
438 | reader => { 'accessor' => \&Class::MOP::Mixin::AttributeCore::accessor }, |
439 | predicate => { 'has_accessor' => \&Class::MOP::Mixin::AttributeCore::has_accessor }, |
dc2b7cc8 |
440 | _definition_context(), |
38bf2a25 |
441 | )) |
442 | ); |
443 | |
444 | Class::MOP::Mixin::AttributeCore->meta->add_attribute( |
445 | Class::MOP::Attribute->new('reader' => ( |
446 | reader => { 'reader' => \&Class::MOP::Mixin::AttributeCore::reader }, |
447 | predicate => { 'has_reader' => \&Class::MOP::Mixin::AttributeCore::has_reader }, |
dc2b7cc8 |
448 | _definition_context(), |
38bf2a25 |
449 | )) |
450 | ); |
451 | |
452 | Class::MOP::Mixin::AttributeCore->meta->add_attribute( |
453 | Class::MOP::Attribute->new('initializer' => ( |
454 | reader => { 'initializer' => \&Class::MOP::Mixin::AttributeCore::initializer }, |
455 | predicate => { 'has_initializer' => \&Class::MOP::Mixin::AttributeCore::has_initializer }, |
dc2b7cc8 |
456 | _definition_context(), |
38bf2a25 |
457 | )) |
458 | ); |
459 | |
460 | Class::MOP::Mixin::AttributeCore->meta->add_attribute( |
461 | Class::MOP::Attribute->new('definition_context' => ( |
462 | reader => { 'definition_context' => \&Class::MOP::Mixin::AttributeCore::definition_context }, |
dc2b7cc8 |
463 | _definition_context(), |
38bf2a25 |
464 | )) |
465 | ); |
466 | |
467 | Class::MOP::Mixin::AttributeCore->meta->add_attribute( |
468 | Class::MOP::Attribute->new('writer' => ( |
469 | reader => { 'writer' => \&Class::MOP::Mixin::AttributeCore::writer }, |
470 | predicate => { 'has_writer' => \&Class::MOP::Mixin::AttributeCore::has_writer }, |
dc2b7cc8 |
471 | _definition_context(), |
38bf2a25 |
472 | )) |
473 | ); |
474 | |
475 | Class::MOP::Mixin::AttributeCore->meta->add_attribute( |
476 | Class::MOP::Attribute->new('predicate' => ( |
477 | reader => { 'predicate' => \&Class::MOP::Mixin::AttributeCore::predicate }, |
478 | predicate => { 'has_predicate' => \&Class::MOP::Mixin::AttributeCore::has_predicate }, |
dc2b7cc8 |
479 | _definition_context(), |
38bf2a25 |
480 | )) |
481 | ); |
482 | |
483 | Class::MOP::Mixin::AttributeCore->meta->add_attribute( |
484 | Class::MOP::Attribute->new('clearer' => ( |
485 | reader => { 'clearer' => \&Class::MOP::Mixin::AttributeCore::clearer }, |
486 | predicate => { 'has_clearer' => \&Class::MOP::Mixin::AttributeCore::has_clearer }, |
dc2b7cc8 |
487 | _definition_context(), |
38bf2a25 |
488 | )) |
489 | ); |
490 | |
491 | Class::MOP::Mixin::AttributeCore->meta->add_attribute( |
492 | Class::MOP::Attribute->new('builder' => ( |
493 | reader => { 'builder' => \&Class::MOP::Mixin::AttributeCore::builder }, |
494 | predicate => { 'has_builder' => \&Class::MOP::Mixin::AttributeCore::has_builder }, |
dc2b7cc8 |
495 | _definition_context(), |
38bf2a25 |
496 | )) |
497 | ); |
498 | |
499 | Class::MOP::Mixin::AttributeCore->meta->add_attribute( |
500 | Class::MOP::Attribute->new('init_arg' => ( |
501 | reader => { 'init_arg' => \&Class::MOP::Mixin::AttributeCore::init_arg }, |
502 | predicate => { 'has_init_arg' => \&Class::MOP::Mixin::AttributeCore::has_init_arg }, |
dc2b7cc8 |
503 | _definition_context(), |
38bf2a25 |
504 | )) |
505 | ); |
506 | |
507 | Class::MOP::Mixin::AttributeCore->meta->add_attribute( |
508 | Class::MOP::Attribute->new('default' => ( |
509 | # default has a custom 'reader' method ... |
510 | predicate => { 'has_default' => \&Class::MOP::Mixin::AttributeCore::has_default }, |
dc2b7cc8 |
511 | _definition_context(), |
38bf2a25 |
512 | )) |
513 | ); |
514 | |
515 | Class::MOP::Mixin::AttributeCore->meta->add_attribute( |
516 | Class::MOP::Attribute->new('insertion_order' => ( |
517 | reader => { 'insertion_order' => \&Class::MOP::Mixin::AttributeCore::insertion_order }, |
518 | writer => { '_set_insertion_order' => \&Class::MOP::Mixin::AttributeCore::_set_insertion_order }, |
519 | predicate => { 'has_insertion_order' => \&Class::MOP::Mixin::AttributeCore::has_insertion_order }, |
dc2b7cc8 |
520 | _definition_context(), |
38bf2a25 |
521 | )) |
522 | ); |
523 | |
524 | ## -------------------------------------------------------- |
525 | ## Class::MOP::Attribute |
526 | Class::MOP::Attribute->meta->add_attribute( |
527 | Class::MOP::Attribute->new('associated_class' => ( |
528 | reader => { |
529 | # NOTE: we need to do this in order |
530 | # for the instance meta-object to |
531 | # not fall into meta-circular death |
532 | # |
533 | # we just alias the original method |
534 | # rather than re-produce it here |
535 | 'associated_class' => \&Class::MOP::Attribute::associated_class |
dc2b7cc8 |
536 | }, |
537 | _definition_context(), |
38bf2a25 |
538 | )) |
539 | ); |
540 | |
541 | Class::MOP::Attribute->meta->add_attribute( |
542 | Class::MOP::Attribute->new('associated_methods' => ( |
543 | reader => { 'associated_methods' => \&Class::MOP::Attribute::associated_methods }, |
dc2b7cc8 |
544 | default => sub { [] }, |
545 | _definition_context(), |
38bf2a25 |
546 | )) |
547 | ); |
548 | |
549 | Class::MOP::Attribute->meta->add_method('clone' => sub { |
550 | my $self = shift; |
551 | $self->meta->clone_object($self, @_); |
552 | }); |
553 | |
554 | ## -------------------------------------------------------- |
555 | ## Class::MOP::Method |
556 | Class::MOP::Method->meta->add_attribute( |
557 | Class::MOP::Attribute->new('body' => ( |
558 | reader => { 'body' => \&Class::MOP::Method::body }, |
dc2b7cc8 |
559 | _definition_context(), |
38bf2a25 |
560 | )) |
561 | ); |
562 | |
563 | Class::MOP::Method->meta->add_attribute( |
564 | Class::MOP::Attribute->new('associated_metaclass' => ( |
565 | reader => { 'associated_metaclass' => \&Class::MOP::Method::associated_metaclass }, |
dc2b7cc8 |
566 | _definition_context(), |
38bf2a25 |
567 | )) |
568 | ); |
569 | |
570 | Class::MOP::Method->meta->add_attribute( |
571 | Class::MOP::Attribute->new('package_name' => ( |
572 | reader => { 'package_name' => \&Class::MOP::Method::package_name }, |
dc2b7cc8 |
573 | _definition_context(), |
38bf2a25 |
574 | )) |
575 | ); |
576 | |
577 | Class::MOP::Method->meta->add_attribute( |
578 | Class::MOP::Attribute->new('name' => ( |
579 | reader => { 'name' => \&Class::MOP::Method::name }, |
dc2b7cc8 |
580 | _definition_context(), |
38bf2a25 |
581 | )) |
582 | ); |
583 | |
584 | Class::MOP::Method->meta->add_attribute( |
585 | Class::MOP::Attribute->new('original_method' => ( |
586 | reader => { 'original_method' => \&Class::MOP::Method::original_method }, |
587 | writer => { '_set_original_method' => \&Class::MOP::Method::_set_original_method }, |
dc2b7cc8 |
588 | _definition_context(), |
38bf2a25 |
589 | )) |
590 | ); |
591 | |
592 | ## -------------------------------------------------------- |
593 | ## Class::MOP::Method::Wrapped |
594 | |
595 | # NOTE: |
596 | # the way this item is initialized, this |
597 | # really does not follow the standard |
598 | # practices of attributes, but we put |
599 | # it here for completeness |
600 | Class::MOP::Method::Wrapped->meta->add_attribute( |
dc2b7cc8 |
601 | Class::MOP::Attribute->new('modifier_table' => ( |
602 | _definition_context(), |
603 | )) |
38bf2a25 |
604 | ); |
605 | |
606 | ## -------------------------------------------------------- |
607 | ## Class::MOP::Method::Generated |
608 | |
609 | Class::MOP::Method::Generated->meta->add_attribute( |
610 | Class::MOP::Attribute->new('is_inline' => ( |
611 | reader => { 'is_inline' => \&Class::MOP::Method::Generated::is_inline }, |
dc2b7cc8 |
612 | default => 0, |
613 | _definition_context(), |
38bf2a25 |
614 | )) |
615 | ); |
616 | |
617 | Class::MOP::Method::Generated->meta->add_attribute( |
618 | Class::MOP::Attribute->new('definition_context' => ( |
619 | reader => { 'definition_context' => \&Class::MOP::Method::Generated::definition_context }, |
dc2b7cc8 |
620 | _definition_context(), |
38bf2a25 |
621 | )) |
622 | ); |
623 | |
624 | |
625 | ## -------------------------------------------------------- |
626 | ## Class::MOP::Method::Inlined |
627 | |
628 | Class::MOP::Method::Inlined->meta->add_attribute( |
629 | Class::MOP::Attribute->new('_expected_method_class' => ( |
630 | reader => { '_expected_method_class' => \&Class::MOP::Method::Inlined::_expected_method_class }, |
dc2b7cc8 |
631 | _definition_context(), |
38bf2a25 |
632 | )) |
633 | ); |
634 | |
635 | ## -------------------------------------------------------- |
636 | ## Class::MOP::Method::Accessor |
637 | |
638 | Class::MOP::Method::Accessor->meta->add_attribute( |
639 | Class::MOP::Attribute->new('attribute' => ( |
640 | reader => { |
641 | 'associated_attribute' => \&Class::MOP::Method::Accessor::associated_attribute |
642 | }, |
dc2b7cc8 |
643 | _definition_context(), |
38bf2a25 |
644 | )) |
645 | ); |
646 | |
647 | Class::MOP::Method::Accessor->meta->add_attribute( |
648 | Class::MOP::Attribute->new('accessor_type' => ( |
649 | reader => { 'accessor_type' => \&Class::MOP::Method::Accessor::accessor_type }, |
dc2b7cc8 |
650 | _definition_context(), |
38bf2a25 |
651 | )) |
652 | ); |
653 | |
654 | ## -------------------------------------------------------- |
655 | ## Class::MOP::Method::Constructor |
656 | |
657 | Class::MOP::Method::Constructor->meta->add_attribute( |
658 | Class::MOP::Attribute->new('options' => ( |
659 | reader => { |
660 | 'options' => \&Class::MOP::Method::Constructor::options |
661 | }, |
dc2b7cc8 |
662 | default => sub { +{} }, |
663 | _definition_context(), |
38bf2a25 |
664 | )) |
665 | ); |
666 | |
667 | Class::MOP::Method::Constructor->meta->add_attribute( |
668 | Class::MOP::Attribute->new('associated_metaclass' => ( |
669 | init_arg => "metaclass", # FIXME alias and rename |
670 | reader => { |
671 | 'associated_metaclass' => \&Class::MOP::Method::Constructor::associated_metaclass |
672 | }, |
dc2b7cc8 |
673 | _definition_context(), |
38bf2a25 |
674 | )) |
675 | ); |
676 | |
677 | ## -------------------------------------------------------- |
678 | ## Class::MOP::Instance |
679 | |
680 | # NOTE: |
681 | # these don't yet do much of anything, but are just |
682 | # included for completeness |
683 | |
684 | Class::MOP::Instance->meta->add_attribute( |
685 | Class::MOP::Attribute->new('associated_metaclass', |
686 | reader => { associated_metaclass => \&Class::MOP::Instance::associated_metaclass }, |
dc2b7cc8 |
687 | _definition_context(), |
38bf2a25 |
688 | ), |
689 | ); |
690 | |
691 | Class::MOP::Instance->meta->add_attribute( |
692 | Class::MOP::Attribute->new('_class_name', |
693 | init_arg => undef, |
694 | reader => { _class_name => \&Class::MOP::Instance::_class_name }, |
695 | #lazy => 1, # not yet supported by Class::MOP but out our version does it anyway |
696 | #default => sub { $_[0]->associated_metaclass->name }, |
dc2b7cc8 |
697 | _definition_context(), |
38bf2a25 |
698 | ), |
699 | ); |
700 | |
701 | Class::MOP::Instance->meta->add_attribute( |
702 | Class::MOP::Attribute->new('attributes', |
703 | reader => { attributes => \&Class::MOP::Instance::get_all_attributes }, |
dc2b7cc8 |
704 | _definition_context(), |
38bf2a25 |
705 | ), |
706 | ); |
707 | |
708 | Class::MOP::Instance->meta->add_attribute( |
709 | Class::MOP::Attribute->new('slots', |
710 | reader => { slots => \&Class::MOP::Instance::slots }, |
dc2b7cc8 |
711 | _definition_context(), |
38bf2a25 |
712 | ), |
713 | ); |
714 | |
715 | Class::MOP::Instance->meta->add_attribute( |
716 | Class::MOP::Attribute->new('slot_hash', |
717 | reader => { slot_hash => \&Class::MOP::Instance::slot_hash }, |
dc2b7cc8 |
718 | _definition_context(), |
38bf2a25 |
719 | ), |
720 | ); |
721 | |
722 | ## -------------------------------------------------------- |
723 | ## Class::MOP::Object |
724 | |
725 | # need to replace the meta method there with a real meta method object |
726 | Class::MOP::Object->meta->_add_meta_method('meta'); |
727 | |
728 | ## -------------------------------------------------------- |
729 | ## Class::MOP::Mixin |
730 | |
731 | # need to replace the meta method there with a real meta method object |
732 | Class::MOP::Mixin->meta->_add_meta_method('meta'); |
733 | |
734 | require Class::MOP::Deprecated unless our $no_deprecated; |
735 | |
736 | # we need the meta instance of the meta instance to be created now, in order |
737 | # for the constructor to be able to use it |
738 | Class::MOP::Instance->meta->get_meta_instance; |
739 | |
740 | # pretend the add_method never happenned. it hasn't yet affected anything |
741 | undef Class::MOP::Instance->meta->{_package_cache_flag}; |
742 | |
743 | ## -------------------------------------------------------- |
744 | ## Now close all the Class::MOP::* classes |
745 | |
746 | # NOTE: we don't need to inline the the accessors this only lengthens |
747 | # the compile time of the MOP, and gives us no actual benefits. |
748 | |
749 | $_->meta->make_immutable( |
750 | inline_constructor => 0, |
751 | constructor_name => "_new", |
752 | inline_accessors => 0, |
753 | ) for qw/ |
754 | Class::MOP::Package |
755 | Class::MOP::Module |
756 | Class::MOP::Class |
757 | |
758 | Class::MOP::Attribute |
759 | Class::MOP::Method |
760 | Class::MOP::Instance |
761 | |
762 | Class::MOP::Object |
763 | |
764 | Class::MOP::Method::Generated |
765 | Class::MOP::Method::Inlined |
766 | |
767 | Class::MOP::Method::Accessor |
768 | Class::MOP::Method::Constructor |
769 | Class::MOP::Method::Wrapped |
770 | |
771 | Class::MOP::Method::Meta |
772 | /; |
773 | |
774 | $_->meta->make_immutable( |
775 | inline_constructor => 0, |
776 | constructor_name => undef, |
777 | inline_accessors => 0, |
778 | ) for qw/ |
779 | Class::MOP::Mixin |
780 | Class::MOP::Mixin::AttributeCore |
781 | Class::MOP::Mixin::HasAttributes |
782 | Class::MOP::Mixin::HasMethods |
783 | /; |
784 | |
785 | 1; |
786 | |
787 | # ABSTRACT: A Meta Object Protocol for Perl 5 |
788 | |
789 | __END__ |
790 | |
791 | =pod |
792 | |
793 | =head1 DESCRIPTION |
794 | |
795 | This module is a fully functioning meta object protocol for the |
796 | Perl 5 object system. It makes no attempt to change the behavior or |
797 | characteristics of the Perl 5 object system, only to create a |
798 | protocol for its manipulation and introspection. |
799 | |
800 | That said, it does attempt to create the tools for building a rich set |
801 | of extensions to the Perl 5 object system. Every attempt has been made |
802 | to abide by the spirit of the Perl 5 object system that we all know |
803 | and love. |
804 | |
805 | This documentation is sparse on conceptual details. We suggest looking |
806 | at the items listed in the L<SEE ALSO> section for more |
807 | information. In particular the book "The Art of the Meta Object |
808 | Protocol" was very influential in the development of this system. |
809 | |
810 | =head2 What is a Meta Object Protocol? |
811 | |
812 | A meta object protocol is an API to an object system. |
813 | |
814 | To be more specific, it abstracts the components of an object system |
815 | (classes, object, methods, object attributes, etc.). These |
816 | abstractions can then be used to inspect and manipulate the object |
817 | system which they describe. |
818 | |
819 | It can be said that there are two MOPs for any object system; the |
820 | implicit MOP and the explicit MOP. The implicit MOP handles things |
821 | like method dispatch or inheritance, which happen automatically as |
822 | part of how the object system works. The explicit MOP typically |
823 | handles the introspection/reflection features of the object system. |
824 | |
825 | All object systems have implicit MOPs. Without one, they would not |
826 | work. Explicit MOPs are much less common, and depending on the |
827 | language can vary from restrictive (Reflection in Java or C#) to wide |
828 | open (CLOS is a perfect example). |
829 | |
830 | =head2 Yet Another Class Builder! Why? |
831 | |
832 | This is B<not> a class builder so much as a I<class builder |
833 | B<builder>>. The intent is that an end user will not use this module |
834 | directly, but instead this module is used by module authors to build |
835 | extensions and features onto the Perl 5 object system. |
836 | |
837 | This system is used by L<Moose>, which supplies a powerful class |
838 | builder system built entirely on top of C<Class::MOP>. |
839 | |
840 | =head2 Who is this module for? |
841 | |
842 | This module is for anyone who has ever created or wanted to create a |
843 | module for the Class:: namespace. The tools which this module provides |
844 | make doing complex Perl 5 wizardry simpler, by removing such barriers |
845 | as the need to hack symbol tables, or understand the fine details of |
846 | method dispatch. |
847 | |
848 | =head2 What changes do I have to make to use this module? |
849 | |
850 | This module was designed to be as unintrusive as possible. Many of its |
851 | features are accessible without B<any> change to your existing |
852 | code. It is meant to be a compliment to your existing code and not an |
853 | intrusion on your code base. Unlike many other B<Class::> modules, |
854 | this module B<does not> require you subclass it, or even that you |
855 | C<use> it in within your module's package. |
856 | |
857 | The only features which requires additions to your code are the |
858 | attribute handling and instance construction features, and these are |
859 | both completely optional features. The only reason for this is because |
860 | Perl 5's object system does not actually have these features built |
861 | in. More information about this feature can be found below. |
862 | |
863 | =head2 About Performance |
864 | |
865 | It is a common misconception that explicit MOPs are a performance hit. |
866 | This is not a universal truth, it is a side-effect of some specific |
867 | implementations. For instance, using Java reflection is slow because |
868 | the JVM cannot take advantage of any compiler optimizations, and the |
869 | JVM has to deal with much more runtime type information as well. |
870 | |
871 | Reflection in C# is marginally better as it was designed into the |
872 | language and runtime (the CLR). In contrast, CLOS (the Common Lisp |
873 | Object System) was built to support an explicit MOP, and so |
874 | performance is tuned for it. |
875 | |
876 | This library in particular does its absolute best to avoid putting |
877 | B<any> drain at all upon your code's performance. In fact, by itself |
878 | it does nothing to affect your existing code. So you only pay for what |
879 | you actually use. |
880 | |
881 | =head2 About Metaclass compatibility |
882 | |
883 | This module makes sure that all metaclasses created are both upwards |
884 | and downwards compatible. The topic of metaclass compatibility is |
885 | highly esoteric and is something only encountered when doing deep and |
886 | involved metaclass hacking. There are two basic kinds of metaclass |
887 | incompatibility; upwards and downwards. |
888 | |
889 | Upwards metaclass compatibility means that the metaclass of a |
890 | given class is either the same as (or a subclass of) all of the |
891 | class's ancestors. |
892 | |
893 | Downward metaclass compatibility means that the metaclasses of a |
894 | given class's ancestors are all either the same as (or a subclass |
895 | of) that metaclass. |
896 | |
897 | Here is a diagram showing a set of two classes (C<A> and C<B>) and |
898 | two metaclasses (C<Meta::A> and C<Meta::B>) which have correct |
899 | metaclass compatibility both upwards and downwards. |
900 | |
901 | +---------+ +---------+ |
902 | | Meta::A |<----| Meta::B | <....... (instance of ) |
903 | +---------+ +---------+ <------- (inherits from) |
904 | ^ ^ |
905 | : : |
906 | +---------+ +---------+ |
907 | | A |<----| B | |
908 | +---------+ +---------+ |
909 | |
910 | In actuality, I<all> of a class's metaclasses must be compatible, |
911 | not just the class metaclass. That includes the instance, attribute, |
912 | and method metaclasses, as well as the constructor and destructor |
913 | classes. |
914 | |
915 | C<Class::MOP> will attempt to fix some simple types of |
916 | incompatibilities. If all the metaclasses for the parent class are |
917 | I<subclasses> of the child's metaclasses then we can simply replace |
918 | the child's metaclasses with the parent's. In addition, if the child |
919 | is missing a metaclass that the parent has, we can also just make the |
920 | child use the parent's metaclass. |
921 | |
922 | As I said this is a highly esoteric topic and one you will only run |
923 | into if you do a lot of subclassing of L<Class::MOP::Class>. If you |
924 | are interested in why this is an issue see the paper I<Uniform and |
925 | safe metaclass composition> linked to in the L<SEE ALSO> section of |
926 | this document. |
927 | |
928 | =head2 Using custom metaclasses |
929 | |
930 | Always use the L<metaclass> pragma when using a custom metaclass, this |
931 | will ensure the proper initialization order and not accidentally |
932 | create an incorrect type of metaclass for you. This is a very rare |
933 | problem, and one which can only occur if you are doing deep metaclass |
934 | programming. So in other words, don't worry about it. |
935 | |
936 | Note that if you're using L<Moose> we encourage you to I<not> use |
937 | L<metaclass> pragma, and instead use L<Moose::Util::MetaRole> to apply |
938 | roles to a class's metaclasses. This topic is covered at length in |
939 | various L<Moose::Cookbook> recipes. |
940 | |
941 | =head1 PROTOCOLS |
942 | |
943 | The meta-object protocol is divided into 4 main sub-protocols: |
944 | |
945 | =head2 The Class protocol |
946 | |
947 | This provides a means of manipulating and introspecting a Perl 5 |
948 | class. It handles symbol table hacking for you, and provides a rich |
949 | set of methods that go beyond simple package introspection. |
950 | |
951 | See L<Class::MOP::Class> for more details. |
952 | |
953 | =head2 The Attribute protocol |
954 | |
955 | This provides a consistent representation for an attribute of a Perl 5 |
956 | class. Since there are so many ways to create and handle attributes in |
957 | Perl 5 OO, the Attribute protocol provide as much of a unified |
958 | approach as possible. Of course, you are always free to extend this |
959 | protocol by subclassing the appropriate classes. |
960 | |
961 | See L<Class::MOP::Attribute> for more details. |
962 | |
963 | =head2 The Method protocol |
964 | |
965 | This provides a means of manipulating and introspecting methods in the |
966 | Perl 5 object system. As with attributes, there are many ways to |
967 | approach this topic, so we try to keep it pretty basic, while still |
968 | making it possible to extend the system in many ways. |
969 | |
970 | See L<Class::MOP::Method> for more details. |
971 | |
972 | =head2 The Instance protocol |
973 | |
974 | This provides a layer of abstraction for creating object instances. |
975 | Since the other layers use this protocol, it is relatively easy to |
976 | change the type of your instances from the default hash reference to |
977 | some other type of reference. Several examples are provided in the |
978 | F<examples/> directory included in this distribution. |
979 | |
980 | See L<Class::MOP::Instance> for more details. |
981 | |
982 | =head1 FUNCTIONS |
983 | |
984 | Note that this module does not export any constants or functions. |
985 | |
38bf2a25 |
986 | =head2 Utility functions |
987 | |
988 | Note that these are all called as B<functions, not methods>. |
989 | |
990 | =over 4 |
991 | |
992 | =item B<Class::MOP::load_class($class_name, \%options?)> |
993 | |
994 | This will load the specified C<$class_name>, if it is not already |
995 | loaded (as reported by C<is_class_loaded>). This function can be used |
996 | in place of tricks like C<eval "use $module"> or using C<require> |
997 | unconditionally. |
998 | |
999 | If the module cannot be loaded, an exception is thrown. |
1000 | |
1001 | You can pass a hash reference with options as second argument. The |
7bb4be82 |
1002 | only option currently recognized is C<-version>, which will ensure |
38bf2a25 |
1003 | that the loaded class has at least the required version. |
1004 | |
38bf2a25 |
1005 | For historical reasons, this function explicitly returns a true value. |
1006 | |
1007 | =item B<Class::MOP::is_class_loaded($class_name, \%options?)> |
1008 | |
1009 | Returns a boolean indicating whether or not C<$class_name> has been |
1010 | loaded. |
1011 | |
1012 | This does a basic check of the symbol table to try and determine as |
1013 | best it can if the C<$class_name> is loaded, it is probably correct |
1014 | about 99% of the time, but it can be fooled into reporting false |
1015 | positives. In particular, loading any of the core L<IO> modules will |
1016 | cause most of the rest of the core L<IO> modules to falsely report |
1017 | having been loaded, due to the way the base L<IO> module works. |
1018 | |
1019 | You can pass a hash reference with options as second argument. The |
7bb4be82 |
1020 | only option currently recognized is C<-version>, which will ensure |
38bf2a25 |
1021 | that the loaded class has at least the required version. |
1022 | |
38bf2a25 |
1023 | =item B<Class::MOP::get_code_info($code)> |
1024 | |
1025 | This function returns two values, the name of the package the C<$code> |
1026 | is from and the name of the C<$code> itself. This is used by several |
1027 | elements of the MOP to determine where a given C<$code> reference is |
1028 | from. |
1029 | |
1030 | =item B<Class::MOP::class_of($instance_or_class_name)> |
1031 | |
1032 | This will return the metaclass of the given instance or class name. If the |
1033 | class lacks a metaclass, no metaclass will be initialized, and C<undef> will be |
1034 | returned. |
1035 | |
38bf2a25 |
1036 | =back |
1037 | |
1038 | =head2 Metaclass cache functions |
1039 | |
1040 | Class::MOP holds a cache of metaclasses. The following are functions |
1041 | (B<not methods>) which can be used to access that cache. It is not |
1042 | recommended that you mess with these. Bad things could happen, but if |
1043 | you are brave and willing to risk it: go for it! |
1044 | |
1045 | =over 4 |
1046 | |
1047 | =item B<Class::MOP::get_all_metaclasses> |
1048 | |
1049 | This will return a hash of all the metaclass instances that have |
1050 | been cached by L<Class::MOP::Class>, keyed by the package name. |
1051 | |
1052 | =item B<Class::MOP::get_all_metaclass_instances> |
1053 | |
1054 | This will return a list of all the metaclass instances that have |
1055 | been cached by L<Class::MOP::Class>. |
1056 | |
1057 | =item B<Class::MOP::get_all_metaclass_names> |
1058 | |
1059 | This will return a list of all the metaclass names that have |
1060 | been cached by L<Class::MOP::Class>. |
1061 | |
1062 | =item B<Class::MOP::get_metaclass_by_name($name)> |
1063 | |
1064 | This will return a cached L<Class::MOP::Class> instance, or nothing |
1065 | if no metaclass exists with that C<$name>. |
1066 | |
1067 | =item B<Class::MOP::store_metaclass_by_name($name, $meta)> |
1068 | |
1069 | This will store a metaclass in the cache at the supplied C<$key>. |
1070 | |
1071 | =item B<Class::MOP::weaken_metaclass($name)> |
1072 | |
1073 | In rare cases (e.g. anonymous metaclasses) it is desirable to |
1074 | store a weakened reference in the metaclass cache. This |
1075 | function will weaken the reference to the metaclass stored |
1076 | in C<$name>. |
1077 | |
1078 | =item B<Class::MOP::metaclass_is_weak($name)> |
1079 | |
1080 | Returns true if the metaclass for C<$name> has been weakened |
1081 | (via C<weaken_metaclass>). |
1082 | |
1083 | =item B<Class::MOP::does_metaclass_exist($name)> |
1084 | |
1085 | This will return true of there exists a metaclass stored in the |
1086 | C<$name> key, and return false otherwise. |
1087 | |
1088 | =item B<Class::MOP::remove_metaclass_by_name($name)> |
1089 | |
1090 | This will remove the metaclass stored in the C<$name> key. |
1091 | |
1092 | =back |
1093 | |
38bf2a25 |
1094 | =head1 SEE ALSO |
1095 | |
1096 | =head2 Books |
1097 | |
1098 | There are very few books out on Meta Object Protocols and Metaclasses |
1099 | because it is such an esoteric topic. The following books are really |
1100 | the only ones I have found. If you know of any more, B<I<please>> |
1101 | email me and let me know, I would love to hear about them. |
1102 | |
1103 | =over 4 |
1104 | |
1105 | =item I<The Art of the Meta Object Protocol> |
1106 | |
1107 | =item I<Advances in Object-Oriented Metalevel Architecture and Reflection> |
1108 | |
1109 | =item I<Putting MetaClasses to Work> |
1110 | |
1111 | =item I<Smalltalk: The Language> |
1112 | |
1113 | =back |
1114 | |
1115 | =head2 Papers |
1116 | |
1117 | =over 4 |
1118 | |
1119 | =item "Uniform and safe metaclass composition" |
1120 | |
1121 | An excellent paper by the people who brought us the original Traits paper. |
1122 | This paper is on how Traits can be used to do safe metaclass composition, |
1123 | and offers an excellent introduction section which delves into the topic of |
1124 | metaclass compatibility. |
1125 | |
1126 | L<http://www.iam.unibe.ch/~scg/Archive/Papers/Duca05ySafeMetaclassTrait.pdf> |
1127 | |
1128 | =item "Safe Metaclass Programming" |
1129 | |
1130 | This paper seems to precede the above paper, and propose a mix-in based |
1131 | approach as opposed to the Traits based approach. Both papers have similar |
1132 | information on the metaclass compatibility problem space. |
1133 | |
1134 | L<http://citeseer.ist.psu.edu/37617.html> |
1135 | |
1136 | =back |
1137 | |
1138 | =head2 Prior Art |
1139 | |
1140 | =over 4 |
1141 | |
1142 | =item The Perl 6 MetaModel work in the Pugs project |
1143 | |
1144 | =over 4 |
1145 | |
1146 | =item L<http://svn.openfoundry.org/pugs/misc/Perl-MetaModel/> |
1147 | |
1148 | =item L<http://github.com/perl6/p5-modules/tree/master/Perl6-ObjectSpace/> |
1149 | |
1150 | =back |
1151 | |
1152 | =back |
1153 | |
1154 | =head2 Articles |
1155 | |
1156 | =over 4 |
1157 | |
1158 | =item CPAN Module Review of Class::MOP |
1159 | |
1160 | L<http://www.oreillynet.com/onlamp/blog/2006/06/cpan_module_review_classmop.html> |
1161 | |
1162 | =back |
1163 | |
1164 | =head1 SIMILAR MODULES |
1165 | |
1166 | As I have said above, this module is a class-builder-builder, so it is |
1167 | not the same thing as modules like L<Class::Accessor> and |
1168 | L<Class::MethodMaker>. That being said there are very few modules on CPAN |
1169 | with similar goals to this module. The one I have found which is most |
69229b40 |
1170 | like this module is L<Class::Meta>, although its philosophy and the MOP it |
38bf2a25 |
1171 | creates are very different from this modules. |
1172 | |
1173 | =head1 BUGS |
1174 | |
1175 | All complex software has bugs lurking in it, and this module is no |
1176 | exception. |
1177 | |
1178 | Please report any bugs to C<bug-class-mop@rt.cpan.org>, or through the |
1179 | web interface at L<http://rt.cpan.org>. |
1180 | |
1181 | You can also discuss feature requests or possible bugs on the Moose |
1182 | mailing list (moose@perl.org) or on IRC at |
1183 | L<irc://irc.perl.org/#moose>. |
1184 | |
1185 | =head1 ACKNOWLEDGEMENTS |
1186 | |
1187 | =over 4 |
1188 | |
1189 | =item Rob Kinyon |
1190 | |
1191 | Thanks to Rob for actually getting the development of this module kick-started. |
1192 | |
1193 | =back |
1194 | |
1195 | =cut |