Commit | Line | Data |
c0e30cf5 |
1 | |
2 | package Moose::Meta::Class; |
3 | |
4 | use strict; |
5 | use warnings; |
6 | |
0addec44 |
7 | use Class::MOP; |
648e79ae |
8 | |
11c86f15 |
9 | use Carp (); |
f8b6827f |
10 | use List::Util qw( first ); |
11 | use List::MoreUtils qw( any all ); |
21f1e231 |
12 | use Scalar::Util 'weaken', 'blessed'; |
a15dff8d |
13 | |
e606ae5f |
14 | our $VERSION = '0.57'; |
15 | $VERSION = eval $VERSION; |
d44714be |
16 | our $AUTHORITY = 'cpan:STEVAN'; |
bc1e29b5 |
17 | |
8ee73eeb |
18 | use Moose::Meta::Method::Overriden; |
3f9e4b0a |
19 | use Moose::Meta::Method::Augmented; |
8ee73eeb |
20 | |
c0e30cf5 |
21 | use base 'Class::MOP::Class'; |
22 | |
598340d5 |
23 | __PACKAGE__->meta->add_attribute('roles' => ( |
ef333f17 |
24 | reader => 'roles', |
25 | default => sub { [] } |
26 | )); |
27 | |
e606ae5f |
28 | __PACKAGE__->meta->add_attribute('constructor_class' => ( |
29 | accessor => 'constructor_class', |
30 | default => sub { 'Moose::Meta::Method::Constructor' } |
31 | )); |
32 | |
33 | __PACKAGE__->meta->add_attribute('destructor_class' => ( |
34 | accessor => 'destructor_class', |
35 | default => sub { 'Moose::Meta::Method::Destructor' } |
36 | )); |
37 | |
11c86f15 |
38 | __PACKAGE__->meta->add_attribute('error_builder' => ( |
39 | reader => 'error_builder', |
40 | default => 'confess', |
41 | )); |
42 | |
43 | __PACKAGE__->meta->add_attribute('error_class' => ( |
44 | reader => 'error_class', |
45 | )); |
46 | |
47 | |
590868a3 |
48 | sub initialize { |
49 | my $class = shift; |
50 | my $pkg = shift; |
685f7e44 |
51 | return Class::MOP::get_metaclass_by_name($pkg) |
52 | || $class->SUPER::initialize($pkg, |
53 | 'attribute_metaclass' => 'Moose::Meta::Attribute', |
54 | 'method_metaclass' => 'Moose::Meta::Method', |
55 | 'instance_metaclass' => 'Moose::Meta::Instance', |
56 | @_ |
57 | ); |
ac2dc464 |
58 | } |
590868a3 |
59 | |
61bdd94f |
60 | sub create { |
61 | my ($self, $package_name, %options) = @_; |
62 | |
63 | (ref $options{roles} eq 'ARRAY') |
11c86f15 |
64 | || $self->throw_error("You must pass an ARRAY ref of roles", data => $options{roles}) |
61bdd94f |
65 | if exists $options{roles}; |
dd37a5be |
66 | |
67 | my $super = delete $options{superclasses}; |
68 | |
61bdd94f |
69 | my $class = $self->SUPER::create($package_name, %options); |
dd37a5be |
70 | |
71 | if ( my @super = @{ $super || [] } ) { |
0635500e |
72 | $class->_fix_metaclass_incompatibility(@super); |
dd37a5be |
73 | $class->superclasses(@super); |
74 | } |
75 | |
48045612 |
76 | if (exists $options{roles}) { |
61bdd94f |
77 | Moose::Util::apply_all_roles($class, @{$options{roles}}); |
78 | } |
79 | |
80 | return $class; |
81 | } |
82 | |
17594769 |
83 | my %ANON_CLASSES; |
84 | |
85 | sub create_anon_class { |
86 | my ($self, %options) = @_; |
87 | |
88 | my $cache_ok = delete $options{cache}; |
17594769 |
89 | |
90 | # something like Super::Class|Super::Class::2=Role|Role::1 |
91 | my $cache_key = join '=' => ( |
6d5cbd2b |
92 | join('|', sort @{$options{superclasses} || []}), |
93 | join('|', sort @{$options{roles} || []}), |
17594769 |
94 | ); |
95 | |
6d5cbd2b |
96 | if ($cache_ok && defined $ANON_CLASSES{$cache_key}) { |
17594769 |
97 | return $ANON_CLASSES{$cache_key}; |
98 | } |
99 | |
100 | my $new_class = $self->SUPER::create_anon_class(%options); |
101 | |
6d5cbd2b |
102 | $ANON_CLASSES{$cache_key} = $new_class |
103 | if $cache_ok; |
17594769 |
104 | |
105 | return $new_class; |
106 | } |
107 | |
ef333f17 |
108 | sub add_role { |
109 | my ($self, $role) = @_; |
110 | (blessed($role) && $role->isa('Moose::Meta::Role')) |
11c86f15 |
111 | || $self->throw_error("Roles must be instances of Moose::Meta::Role", data => $role); |
ef333f17 |
112 | push @{$self->roles} => $role; |
113 | } |
114 | |
b8aeb4dc |
115 | sub calculate_all_roles { |
116 | my $self = shift; |
117 | my %seen; |
118 | grep { !$seen{$_->name}++ } map { $_->calculate_all_roles } @{ $self->roles }; |
119 | } |
120 | |
ef333f17 |
121 | sub does_role { |
122 | my ($self, $role_name) = @_; |
123 | (defined $role_name) |
11c86f15 |
124 | || $self->throw_error("You must supply a role name to look for"); |
9c429218 |
125 | foreach my $class ($self->class_precedence_list) { |
81c3738f |
126 | next unless $class->can('meta') && $class->meta->can('roles'); |
9c429218 |
127 | foreach my $role (@{$class->meta->roles}) { |
128 | return 1 if $role->does_role($role_name); |
129 | } |
ef333f17 |
130 | } |
131 | return 0; |
132 | } |
133 | |
d79e62fd |
134 | sub excludes_role { |
135 | my ($self, $role_name) = @_; |
136 | (defined $role_name) |
11c86f15 |
137 | || $self->throw_error("You must supply a role name to look for"); |
ac2dc464 |
138 | foreach my $class ($self->class_precedence_list) { |
139 | next unless $class->can('meta'); |
5cb193ed |
140 | # NOTE: |
141 | # in the pretty rare instance when a Moose metaclass |
ac2dc464 |
142 | # is itself extended with a role, this check needs to |
5cb193ed |
143 | # be done since some items in the class_precedence_list |
ac2dc464 |
144 | # might in fact be Class::MOP based still. |
145 | next unless $class->meta->can('roles'); |
9c429218 |
146 | foreach my $role (@{$class->meta->roles}) { |
147 | return 1 if $role->excludes_role($role_name); |
148 | } |
d79e62fd |
149 | } |
150 | return 0; |
151 | } |
152 | |
8c9d74e7 |
153 | sub new_object { |
e606ae5f |
154 | my $class = shift; |
155 | my $params = @_ == 1 ? $_[0] : {@_}; |
156 | my $self = $class->SUPER::new_object($params); |
8c9d74e7 |
157 | foreach my $attr ($class->compute_all_applicable_attributes()) { |
4078709c |
158 | # if we have a trigger, then ... |
159 | if ($attr->can('has_trigger') && $attr->has_trigger) { |
160 | # make sure we have an init-arg ... |
161 | if (defined(my $init_arg = $attr->init_arg)) { |
162 | # now make sure an init-arg was passes ... |
e606ae5f |
163 | if (exists $params->{$init_arg}) { |
4078709c |
164 | # and if get here, fire the trigger |
165 | $attr->trigger->( |
166 | $self, |
167 | # check if there is a coercion |
168 | ($attr->should_coerce |
169 | # and if so, we need to grab the |
170 | # value that is actually been stored |
171 | ? $attr->get_read_method_ref->($self) |
172 | # otherwise, just get the value from |
173 | # the constructor params |
e606ae5f |
174 | : $params->{$init_arg}), |
4078709c |
175 | $attr |
176 | ); |
177 | } |
178 | } |
625d571f |
179 | } |
8c9d74e7 |
180 | } |
ac2dc464 |
181 | return $self; |
8c9d74e7 |
182 | } |
183 | |
a15dff8d |
184 | sub construct_instance { |
e606ae5f |
185 | my $class = shift; |
186 | my $params = @_ == 1 ? $_[0] : {@_}; |
ddd0ec20 |
187 | my $meta_instance = $class->get_meta_instance; |
575db57d |
188 | # FIXME: |
189 | # the code below is almost certainly incorrect |
190 | # but this is foreign inheritence, so we might |
ac2dc464 |
191 | # have to kludge it in the end. |
e606ae5f |
192 | my $instance = $params->{'__INSTANCE__'} || $meta_instance->create_instance(); |
ac2dc464 |
193 | foreach my $attr ($class->compute_all_applicable_attributes()) { |
e606ae5f |
194 | $attr->initialize_instance_slot($meta_instance, $instance, $params); |
a15dff8d |
195 | } |
196 | return $instance; |
197 | } |
198 | |
093b12c2 |
199 | # FIXME: |
200 | # This is ugly |
ac2dc464 |
201 | sub get_method_map { |
093b12c2 |
202 | my $self = shift; |
53dd42d8 |
203 | |
e606ae5f |
204 | my $current = Class::MOP::check_package_cache_flag($self->name); |
205 | |
206 | if (defined $self->{'_package_cache_flag'} && $self->{'_package_cache_flag'} == $current) { |
207 | return $self->{'methods'}; |
53dd42d8 |
208 | } |
209 | |
e606ae5f |
210 | $self->{_package_cache_flag} = $current; |
211 | |
212 | my $map = $self->{'methods'}; |
ac2dc464 |
213 | |
093b12c2 |
214 | my $class_name = $self->name; |
215 | my $method_metaclass = $self->method_metaclass; |
ac2dc464 |
216 | |
0addec44 |
217 | my %all_code = $self->get_all_package_symbols('CODE'); |
ac2dc464 |
218 | |
0addec44 |
219 | foreach my $symbol (keys %all_code) { |
220 | my $code = $all_code{$symbol}; |
ac2dc464 |
221 | |
222 | next if exists $map->{$symbol} && |
223 | defined $map->{$symbol} && |
224 | $map->{$symbol}->body == $code; |
225 | |
53dd42d8 |
226 | my ($pkg, $name) = Class::MOP::get_code_info($code); |
ac2dc464 |
227 | |
53dd42d8 |
228 | if ($pkg->can('meta') |
4f8f3aab |
229 | # NOTE: |
230 | # we don't know what ->meta we are calling |
53dd42d8 |
231 | # here, so we need to be careful cause it |
232 | # just might blow up at us, or just complain |
233 | # loudly (in the case of Curses.pm) so we |
4f8f3aab |
234 | # just be a little overly cautious here. |
235 | # - SL |
236 | && eval { no warnings; blessed($pkg->meta) } |
237 | && $pkg->meta->isa('Moose::Meta::Role')) { |
093b12c2 |
238 | #my $role = $pkg->meta->name; |
239 | #next unless $self->does_role($role); |
240 | } |
241 | else { |
2887c827 |
242 | |
243 | # NOTE: |
244 | # in 5.10 constant.pm the constants show up |
245 | # as being in the right package, but in pre-5.10 |
246 | # they show up as constant::__ANON__ so we |
247 | # make an exception here to be sure that things |
248 | # work as expected in both. |
249 | # - SL |
250 | unless ($pkg eq 'constant' && $name eq '__ANON__') { |
251 | next if ($pkg || '') ne $class_name || |
252 | (($name || '') ne '__ANON__' && ($pkg || '') ne $class_name); |
253 | } |
53dd42d8 |
254 | |
093b12c2 |
255 | } |
ac2dc464 |
256 | |
1b2aea39 |
257 | $map->{$symbol} = $method_metaclass->wrap( |
258 | $code, |
259 | package_name => $class_name, |
260 | name => $symbol |
261 | ); |
093b12c2 |
262 | } |
ac2dc464 |
263 | |
093b12c2 |
264 | return $map; |
a7d0cd00 |
265 | } |
266 | |
093b12c2 |
267 | ### --------------------------------------------- |
268 | |
a2eec5e7 |
269 | sub add_attribute { |
270 | my $self = shift; |
e472c9a5 |
271 | $self->SUPER::add_attribute( |
272 | (blessed $_[0] && $_[0]->isa('Class::MOP::Attribute') |
273 | ? $_[0] |
274 | : $self->_process_attribute(@_)) |
275 | ); |
a2eec5e7 |
276 | } |
277 | |
78cd1d3b |
278 | sub add_override_method_modifier { |
279 | my ($self, $name, $method, $_super_package) = @_; |
18c2ec0e |
280 | |
d05cd563 |
281 | (!$self->has_method($name)) |
11c86f15 |
282 | || $self->throw_error("Cannot add an override method if a local method is already present"); |
18c2ec0e |
283 | |
284 | $self->add_method($name => Moose::Meta::Method::Overriden->new( |
3f9e4b0a |
285 | method => $method, |
286 | class => $self, |
287 | package => $_super_package, # need this for roles |
288 | name => $name, |
18c2ec0e |
289 | )); |
78cd1d3b |
290 | } |
291 | |
292 | sub add_augment_method_modifier { |
ac2dc464 |
293 | my ($self, $name, $method) = @_; |
d05cd563 |
294 | (!$self->has_method($name)) |
11c86f15 |
295 | || $self->throw_error("Cannot add an augment method if a local method is already present"); |
3f9e4b0a |
296 | |
297 | $self->add_method($name => Moose::Meta::Method::Augmented->new( |
298 | method => $method, |
299 | class => $self, |
300 | name => $name, |
301 | )); |
78cd1d3b |
302 | } |
303 | |
1341f10c |
304 | ## Private Utility methods ... |
305 | |
05d9eaf6 |
306 | sub _find_next_method_by_name_which_is_not_overridden { |
307 | my ($self, $name) = @_; |
68efb014 |
308 | foreach my $method ($self->find_all_methods_by_name($name)) { |
ac2dc464 |
309 | return $method->{code} |
05d9eaf6 |
310 | if blessed($method->{code}) && !$method->{code}->isa('Moose::Meta::Method::Overriden'); |
311 | } |
312 | return undef; |
313 | } |
314 | |
41419b9e |
315 | sub _fix_metaclass_incompatibility { |
1341f10c |
316 | my ($self, @superclasses) = @_; |
e606ae5f |
317 | |
1341f10c |
318 | foreach my $super (@superclasses) { |
f8b6827f |
319 | next if $self->_superclass_meta_is_compatible($super); |
e606ae5f |
320 | |
321 | unless ( $self->is_pristine ) { |
f8b6827f |
322 | $self->throw_error( |
323 | "Cannot attempt to reinitialize metaclass for " |
324 | . $self->name |
325 | . ", it isn't pristine" ); |
1341f10c |
326 | } |
e606ae5f |
327 | |
0635500e |
328 | $self->_reconcile_with_superclass_meta($super); |
f8b6827f |
329 | } |
f8b6827f |
330 | } |
331 | |
332 | sub _superclass_meta_is_compatible { |
333 | my ($self, $super) = @_; |
334 | |
335 | my $super_meta = Class::MOP::Class->initialize($super) |
336 | or return 1; |
337 | |
338 | next unless $super_meta->isa("Class::MOP::Class"); |
339 | |
340 | my $super_meta_name |
341 | = $super_meta->is_immutable |
342 | ? $super_meta->get_mutable_metaclass_name |
343 | : ref($super_meta); |
344 | |
345 | return 1 |
346 | if $self->isa($super_meta_name) |
347 | and |
348 | $self->instance_metaclass->isa( $super_meta->instance_metaclass ); |
349 | } |
350 | |
351 | # I don't want to have to type this >1 time |
352 | my @MetaClassTypes = |
353 | qw( attribute_metaclass method_metaclass instance_metaclass constructor_class destructor_class ); |
354 | |
355 | sub _reconcile_with_superclass_meta { |
356 | my ($self, $super) = @_; |
357 | |
358 | my $super_meta = $super->meta; |
359 | |
dd37a5be |
360 | my $super_meta_name |
f8b6827f |
361 | = $super_meta->is_immutable |
362 | ? $super_meta->get_mutable_metaclass_name |
363 | : ref($super_meta); |
e606ae5f |
364 | |
f8b6827f |
365 | my $self_metaclass = ref $self; |
366 | |
367 | # If neither of these is true we have a more serious |
368 | # incompatibility that we just cannot fix (yet?). |
dd37a5be |
369 | if ( $super_meta_name->isa( ref $self ) |
f8b6827f |
370 | && all { $super_meta->$_->isa( $self->$_ ) } @MetaClassTypes ) { |
0635500e |
371 | $self->_reinitialize_with($super_meta); |
f8b6827f |
372 | } |
373 | elsif ( $self->_all_metaclasses_differ_by_roles_only($super_meta) ) { |
0635500e |
374 | $self->_reconcile_role_differences($super_meta); |
1341f10c |
375 | } |
1341f10c |
376 | } |
377 | |
f8b6827f |
378 | sub _reinitialize_with { |
379 | my ( $self, $new_meta ) = @_; |
380 | |
0635500e |
381 | my $new_self = $new_meta->reinitialize( |
f8b6827f |
382 | $self->name, |
383 | attribute_metaclass => $new_meta->attribute_metaclass, |
384 | method_metaclass => $new_meta->method_metaclass, |
385 | instance_metaclass => $new_meta->instance_metaclass, |
386 | ); |
387 | |
0635500e |
388 | $new_self->$_( $new_meta->$_ ) for qw( constructor_class destructor_class ); |
f8b6827f |
389 | |
0635500e |
390 | %$self = %$new_self; |
391 | |
392 | bless $self, ref $new_self; |
393 | |
394 | Class::MOP::store_metaclass_by_name( $self->name, $self ); |
f8b6827f |
395 | } |
396 | |
397 | # In the more complex case, we share a common ancestor with our |
398 | # superclass's metaclass, but each metaclass (ours and the parent's) |
399 | # has a different set of roles applied. We reconcile this by first |
400 | # reinitializing into the parent class, and _then_ applying our own |
401 | # roles. |
402 | sub _all_metaclasses_differ_by_roles_only { |
403 | my ($self, $super_meta) = @_; |
404 | |
405 | for my $pair ( |
406 | [ ref $self, ref $super_meta ], |
407 | map { [ $self->$_, $super_meta->$_ ] } @MetaClassTypes |
408 | ) { |
409 | |
410 | next if $pair->[0] eq $pair->[1]; |
411 | |
412 | my $self_meta_meta = Class::MOP::Class->initialize( $pair->[0] ); |
413 | my $super_meta_meta = Class::MOP::Class->initialize( $pair->[1] ); |
414 | |
415 | my $common_ancestor |
416 | = _find_common_ancestor( $self_meta_meta, $super_meta_meta ); |
417 | |
418 | return unless $common_ancestor; |
419 | |
420 | return |
421 | unless _is_role_only_subclass_of( |
422 | $self_meta_meta, |
423 | $common_ancestor, |
424 | ) |
425 | && _is_role_only_subclass_of( |
426 | $super_meta_meta, |
427 | $common_ancestor, |
428 | ); |
429 | } |
430 | |
431 | return 1; |
432 | } |
433 | |
434 | # This, and some other functions, could be called as methods, but |
435 | # they're not for two reasons. One, we just end up ignoring the first |
436 | # argument, because we can't call these directly on one of the real |
437 | # arguments, because one of them could be a Class::MOP::Class object |
438 | # and not a Moose::Meta::Class. Second, only a completely insane |
439 | # person would attempt to subclass this stuff! |
440 | sub _find_common_ancestor { |
441 | my ($meta1, $meta2) = @_; |
442 | |
443 | # FIXME? This doesn't account for multiple inheritance (not sure |
444 | # if it needs to though). For example, is somewhere in $meta1's |
445 | # history it inherits from both ClassA and ClassB, and $meta |
446 | # inherits from ClassB & ClassA, does it matter? And what crazy |
447 | # fool would do that anyway? |
448 | |
449 | my %meta1_parents = map { $_ => 1 } $meta1->linearized_isa; |
450 | |
451 | return first { $meta1_parents{$_} } $meta2->linearized_isa; |
452 | } |
453 | |
454 | sub _is_role_only_subclass_of { |
455 | my ($meta, $ancestor) = @_; |
456 | |
457 | return 1 if $meta->name eq $ancestor; |
458 | |
459 | my @roles = _all_roles_until( $meta, $ancestor ); |
460 | |
461 | my %role_packages = map { $_->name => 1 } @roles; |
462 | |
463 | my $ancestor_meta = Class::MOP::Class->initialize($ancestor); |
464 | |
465 | my %shared_ancestors = map { $_ => 1 } $ancestor_meta->linearized_isa; |
466 | |
467 | for my $method ( $meta->get_all_methods() ) { |
468 | next if $method->name eq 'meta'; |
469 | next if $method->can('associated_attribute'); |
470 | |
471 | next |
472 | if $role_packages{ $method->original_package_name } |
473 | || $shared_ancestors{ $method->original_package_name }; |
474 | |
475 | return 0; |
476 | } |
477 | |
478 | # FIXME - this really isn't right. Just because an attribute is |
479 | # defined in a role doesn't mean it isn't _also_ defined in the |
480 | # subclass. |
481 | for my $attr ( $meta->get_all_attributes ) { |
482 | next if $shared_ancestors{ $attr->associated_class->name }; |
483 | |
484 | next if any { $_->has_attribute( $attr->name ) } @roles; |
485 | |
486 | return 0; |
487 | } |
488 | |
489 | return 1; |
490 | } |
491 | |
492 | sub _all_roles { |
493 | my $meta = shift; |
494 | |
495 | return _all_roles_until($meta); |
496 | } |
497 | |
498 | sub _all_roles_until { |
499 | my ($meta, $stop_at_class) = @_; |
500 | |
501 | return unless $meta->can('calculate_all_roles'); |
502 | |
503 | my @roles = $meta->calculate_all_roles; |
504 | |
505 | for my $class ( $meta->linearized_isa ) { |
506 | last if $stop_at_class && $stop_at_class eq $class; |
507 | |
508 | my $meta = Class::MOP::Class->initialize($class); |
509 | last unless $meta->can('calculate_all_roles'); |
510 | |
511 | push @roles, $meta->calculate_all_roles; |
512 | } |
513 | |
514 | return @roles; |
515 | } |
516 | |
517 | sub _reconcile_role_differences { |
518 | my ($self, $super_meta) = @_; |
519 | |
520 | my $self_meta = $self->meta; |
521 | |
522 | my %roles; |
523 | |
524 | if ( my @roles = map { $_->name } _all_roles($self_meta) ) { |
525 | $roles{metaclass_roles} = \@roles; |
526 | } |
527 | |
528 | for my $thing (@MetaClassTypes) { |
529 | my $name = $self->$thing(); |
530 | |
531 | my $thing_meta = Class::MOP::Class->initialize($name); |
532 | |
533 | my @roles = map { $_->name } _all_roles($thing_meta) |
534 | or next; |
535 | |
536 | $roles{ $thing . '_roles' } = \@roles; |
537 | } |
538 | |
539 | $self = $self->_reinitialize_with($super_meta); |
540 | |
541 | Moose::Util::MetaRole::apply_metaclass_roles( |
542 | for_class => $self->name, |
543 | %roles, |
544 | ); |
545 | |
546 | return $self; |
547 | } |
548 | |
d7d8a8c7 |
549 | # NOTE: |
d9bb6c63 |
550 | # this was crap anyway, see |
551 | # Moose::Util::apply_all_roles |
d7d8a8c7 |
552 | # instead |
4498537c |
553 | sub _apply_all_roles { |
547dda77 |
554 | Carp::croak 'DEPRECATED: use Moose::Util::apply_all_roles($meta, @roles) instead' |
4498537c |
555 | } |
1341f10c |
556 | |
557 | sub _process_attribute { |
a3738e5b |
558 | my ( $self, $name, @args ) = @_; |
7e59b803 |
559 | |
560 | @args = %{$args[0]} if scalar @args == 1 && ref($args[0]) eq 'HASH'; |
d9bb6c63 |
561 | |
1341f10c |
562 | if ($name =~ /^\+(.*)/) { |
7e59b803 |
563 | return $self->_process_inherited_attribute($1, @args); |
1341f10c |
564 | } |
565 | else { |
7e59b803 |
566 | return $self->_process_new_attribute($name, @args); |
567 | } |
568 | } |
569 | |
570 | sub _process_new_attribute { |
571 | my ( $self, $name, @args ) = @_; |
7e59b803 |
572 | |
d5c30e52 |
573 | $self->attribute_metaclass->interpolate_class_and_new($name, @args); |
1341f10c |
574 | } |
575 | |
576 | sub _process_inherited_attribute { |
577 | my ($self, $attr_name, %options) = @_; |
578 | my $inherited_attr = $self->find_attribute_by_name($attr_name); |
579 | (defined $inherited_attr) |
11c86f15 |
580 | || $self->throw_error("Could not find an attribute by the name of '$attr_name' to inherit from", data => $attr_name); |
1341f10c |
581 | if ($inherited_attr->isa('Moose::Meta::Attribute')) { |
d7d8a8c7 |
582 | return $inherited_attr->clone_and_inherit_options(%options); |
1341f10c |
583 | } |
584 | else { |
585 | # NOTE: |
586 | # kind of a kludge to handle Class::MOP::Attributes |
d7d8a8c7 |
587 | return $inherited_attr->Moose::Meta::Attribute::clone_and_inherit_options(%options); |
ac2dc464 |
588 | } |
1341f10c |
589 | } |
590 | |
5cf3dbcf |
591 | ## ------------------------------------------------- |
592 | |
593 | use Moose::Meta::Method::Constructor; |
1f779926 |
594 | use Moose::Meta::Method::Destructor; |
5cf3dbcf |
595 | |
ac2dc464 |
596 | # This could be done by using SUPER and altering ->options |
597 | # I am keeping it this way to make it more explicit. |
598 | sub create_immutable_transformer { |
599 | my $self = shift; |
600 | my $class = Class::MOP::Immutable->new($self, { |
e606ae5f |
601 | read_only => [qw/superclasses/], |
602 | cannot_call => [qw/ |
603 | add_method |
604 | alias_method |
605 | remove_method |
606 | add_attribute |
607 | remove_attribute |
608 | remove_package_symbol |
609 | add_role |
610 | /], |
611 | memoize => { |
612 | class_precedence_list => 'ARRAY', |
613 | linearized_isa => 'ARRAY', # FIXME perl 5.10 memoizes this on its own, no need? |
614 | get_all_methods => 'ARRAY', |
615 | #get_all_attributes => 'ARRAY', # it's an alias, no need, but maybe in the future |
616 | compute_all_applicable_attributes => 'ARRAY', |
617 | get_meta_instance => 'SCALAR', |
618 | get_method_map => 'SCALAR', |
619 | calculate_all_roles => 'ARRAY', |
620 | }, |
621 | # NOTE: |
622 | # this is ugly, but so are typeglobs, |
623 | # so whattayahgonnadoboutit |
624 | # - SL |
625 | wrapped => { |
626 | add_package_symbol => sub { |
627 | my $original = shift; |
628 | $self->throw_error("Cannot add package symbols to an immutable metaclass") |
629 | unless (caller(2))[3] eq 'Class::MOP::Package::get_package_symbol'; |
630 | goto $original->body; |
631 | }, |
632 | }, |
ac2dc464 |
633 | }); |
634 | return $class; |
635 | } |
636 | |
637 | sub make_immutable { |
638 | my $self = shift; |
639 | $self->SUPER::make_immutable |
640 | ( |
e606ae5f |
641 | constructor_class => $self->constructor_class, |
642 | destructor_class => $self->destructor_class, |
ac2dc464 |
643 | inline_destructor => 1, |
644 | # NOTE: |
645 | # no need to do this, |
646 | # Moose always does it |
647 | inline_accessors => 0, |
648 | @_, |
649 | ); |
5cf3dbcf |
650 | } |
651 | |
11c86f15 |
652 | #{ package Moose::Meta::Class::ErrorRoutines; %Carp::Internal? |
653 | |
654 | our $level; |
655 | |
656 | sub throw_error { |
657 | my ( $self, @args ) = @_; |
658 | local $level = 1; |
659 | $self->raise_error($self->create_error(@args)); |
660 | } |
661 | |
662 | sub raise_error { |
663 | my ( $self, @args ) = @_; |
664 | die @args; |
665 | } |
666 | |
667 | sub create_error { |
668 | my ( $self, @args ) = @_; |
669 | |
670 | if ( @args % 2 == 1 ) { |
671 | unshift @args, "message"; |
672 | } |
673 | |
be05faea |
674 | my %args = ( meta => $self, error => $@, @args ); |
11c86f15 |
675 | |
676 | local $level = $level + 1; |
677 | |
678 | if ( my $class = $args{class} || ( ref $self && $self->error_class ) ) { |
679 | return $self->create_error_object( %args, class => $class ); |
680 | } else { |
681 | my $builder = $args{builder} || ( ref($self) ? $self->error_builder : "confess" ); |
682 | |
683 | my $builder_method = ( ( ref($builder) && ref($builder) eq 'CODE' ) |
684 | ? $builder |
685 | : ( $self->can("create_error_$builder") || "create_error_confess" )); |
686 | |
687 | return $self->$builder_method(%args); |
688 | } |
689 | } |
690 | |
691 | sub create_error_object { |
692 | my ( $self, %args ) = @_; |
693 | |
694 | my $class = delete $args{class}; |
695 | |
696 | $class->new( |
11c86f15 |
697 | %args, |
698 | depth => ( ($args{depth} || 1) + ( $level + 1 ) ), |
699 | ); |
700 | } |
701 | |
702 | sub create_error_croak { |
703 | my ( $self, @args ) = @_; |
704 | $self->_create_error_carpmess( @args ); |
705 | } |
706 | |
707 | sub create_error_confess { |
708 | my ( $self, @args ) = @_; |
709 | $self->_create_error_carpmess( @args, longmess => 1 ); |
710 | } |
711 | |
712 | sub _create_error_carpmess { |
713 | my ( $self, %args ) = @_; |
714 | |
715 | my $carp_level = $level + 1 + ( $args{depth} || 1 ); |
716 | |
717 | local $Carp::CarpLevel = $carp_level; # $Carp::CarpLevel + $carp_level ? |
718 | local $Carp::MaxArgNums = 20; # default is 8, usually we use named args which gets messier though |
719 | |
720 | my @args = exists $args{message} ? $args{message} : (); |
721 | |
722 | if ( $args{longmess} ) { |
723 | return Carp::longmess(@args); |
724 | } else { |
725 | return Carp::shortmess(@args); |
726 | } |
727 | } |
728 | |
c0e30cf5 |
729 | 1; |
730 | |
731 | __END__ |
732 | |
733 | =pod |
734 | |
735 | =head1 NAME |
736 | |
e522431d |
737 | Moose::Meta::Class - The Moose metaclass |
c0e30cf5 |
738 | |
c0e30cf5 |
739 | =head1 DESCRIPTION |
740 | |
ac2dc464 |
741 | This is a subclass of L<Class::MOP::Class> with Moose specific |
e522431d |
742 | extensions. |
743 | |
ac2dc464 |
744 | For the most part, the only time you will ever encounter an |
745 | instance of this class is if you are doing some serious deep |
746 | introspection. To really understand this class, you need to refer |
6ba6d68c |
747 | to the L<Class::MOP::Class> documentation. |
748 | |
c0e30cf5 |
749 | =head1 METHODS |
750 | |
751 | =over 4 |
752 | |
590868a3 |
753 | =item B<initialize> |
754 | |
61bdd94f |
755 | =item B<create> |
756 | |
17594769 |
757 | Overrides original to accept a list of roles to apply to |
61bdd94f |
758 | the created class. |
759 | |
17594769 |
760 | my $metaclass = Moose::Meta::Class->create( 'New::Class', roles => [...] ); |
761 | |
762 | =item B<create_anon_class> |
763 | |
764 | Overrides original to support roles and caching. |
765 | |
766 | my $metaclass = Moose::Meta::Class->create_anon_class( |
767 | superclasses => ['Foo'], |
768 | roles => [qw/Some Roles Go Here/], |
769 | cache => 1, |
770 | ); |
771 | |
5cf3dbcf |
772 | =item B<make_immutable> |
773 | |
ac2dc464 |
774 | Override original to add default options for inlining destructor |
775 | and altering the Constructor metaclass. |
776 | |
777 | =item B<create_immutable_transformer> |
778 | |
779 | Override original to lock C<add_role> and memoize C<calculate_all_roles> |
780 | |
8c9d74e7 |
781 | =item B<new_object> |
782 | |
02a0fb52 |
783 | We override this method to support the C<trigger> attribute option. |
784 | |
a15dff8d |
785 | =item B<construct_instance> |
786 | |
ac2dc464 |
787 | This provides some Moose specific extensions to this method, you |
788 | almost never call this method directly unless you really know what |
789 | you are doing. |
6ba6d68c |
790 | |
791 | This method makes sure to handle the moose weak-ref, type-constraint |
ac2dc464 |
792 | and type coercion features. |
ef1d5f4b |
793 | |
093b12c2 |
794 | =item B<get_method_map> |
e9ec68d6 |
795 | |
ac2dc464 |
796 | This accommodates Moose::Meta::Role::Method instances, which are |
797 | aliased, instead of added, but still need to be counted as valid |
e9ec68d6 |
798 | methods. |
799 | |
78cd1d3b |
800 | =item B<add_override_method_modifier ($name, $method)> |
801 | |
ac2dc464 |
802 | This will create an C<override> method modifier for you, and install |
02a0fb52 |
803 | it in the package. |
804 | |
78cd1d3b |
805 | =item B<add_augment_method_modifier ($name, $method)> |
806 | |
ac2dc464 |
807 | This will create an C<augment> method modifier for you, and install |
02a0fb52 |
808 | it in the package. |
809 | |
2b14ac61 |
810 | =item B<calculate_all_roles> |
811 | |
ef333f17 |
812 | =item B<roles> |
813 | |
ac2dc464 |
814 | This will return an array of C<Moose::Meta::Role> instances which are |
02a0fb52 |
815 | attached to this class. |
816 | |
ef333f17 |
817 | =item B<add_role ($role)> |
818 | |
ac2dc464 |
819 | This takes an instance of C<Moose::Meta::Role> in C<$role>, and adds it |
02a0fb52 |
820 | to the list of associated roles. |
821 | |
ef333f17 |
822 | =item B<does_role ($role_name)> |
823 | |
ac2dc464 |
824 | This will test if this class C<does> a given C<$role_name>. It will |
825 | not only check it's local roles, but ask them as well in order to |
02a0fb52 |
826 | cascade down the role hierarchy. |
827 | |
d79e62fd |
828 | =item B<excludes_role ($role_name)> |
829 | |
ac2dc464 |
830 | This will test if this class C<excludes> a given C<$role_name>. It will |
831 | not only check it's local roles, but ask them as well in order to |
d79e62fd |
832 | cascade down the role hierarchy. |
833 | |
9e93dd19 |
834 | =item B<add_attribute ($attr_name, %params|$params)> |
4e848edb |
835 | |
9e93dd19 |
836 | This method does the same thing as L<Class::MOP::Class::add_attribute>, but adds |
837 | support for taking the C<$params> as a HASH ref. |
ac1ef2f9 |
838 | |
e606ae5f |
839 | =item B<constructor_class ($class_name)> |
840 | |
841 | =item B<destructor_class ($class_name)> |
842 | |
843 | These are the names of classes used when making a class |
844 | immutable. These default to L<Moose::Meta::Method::Constructor> and |
845 | L<Moose::Meta::Method::Destructor> respectively. These accessors are |
846 | read-write, so you can use them to change the class name. |
847 | |
11c86f15 |
848 | =item B<throw_error $message, %extra> |
849 | |
850 | Throws the error created by C<create_error> using C<raise_error> |
851 | |
852 | =item B<create_error $message, %extra> |
853 | |
854 | Creates an error message or object. |
855 | |
856 | The default behavior is C<create_error_confess>. |
857 | |
858 | If C<error_class> is set uses C<create_error_object>. Otherwise uses |
859 | C<error_builder> (a code reference or variant name), and calls the appropriate |
860 | C<create_error_$builder> method. |
861 | |
862 | =item B<error_builder $builder_name> |
863 | |
864 | Get or set the error builder. Defaults to C<confess>. |
865 | |
866 | =item B<error_class $class_name> |
867 | |
868 | Get or set the error class. Has no default. |
869 | |
870 | =item B<create_error_confess %args> |
871 | |
872 | Creates an error using L<Carp/longmess> |
873 | |
874 | =item B<create_error_croak %args> |
875 | |
876 | Creates an error using L<Carp/shortmess> |
877 | |
878 | =item B<create_error_object %args> |
879 | |
880 | Calls C<new> on the C<class> parameter in C<%args>. Usable with C<error_class> |
881 | to support custom error objects for your meta class. |
882 | |
883 | =item B<raise_error $error> |
884 | |
885 | Dies with an error object or string. |
886 | |
c0e30cf5 |
887 | =back |
888 | |
889 | =head1 BUGS |
890 | |
ac2dc464 |
891 | All complex software has bugs lurking in it, and this module is no |
c0e30cf5 |
892 | exception. If you find a bug please either email me, or add the bug |
893 | to cpan-RT. |
894 | |
c0e30cf5 |
895 | =head1 AUTHOR |
896 | |
897 | Stevan Little E<lt>stevan@iinteractive.comE<gt> |
898 | |
899 | =head1 COPYRIGHT AND LICENSE |
900 | |
778db3ac |
901 | Copyright 2006-2008 by Infinity Interactive, Inc. |
c0e30cf5 |
902 | |
903 | L<http://www.iinteractive.com> |
904 | |
905 | This library is free software; you can redistribute it and/or modify |
ac2dc464 |
906 | it under the same terms as Perl itself. |
c0e30cf5 |
907 | |
8a7a9c53 |
908 | =cut |
1a563243 |
909 | |